Collisions of low-energy electrons with isopropanol

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bettega, M. H. F.; Winstead, C.; McKoy, V.

2011-10-15

We report measured and calculated cross sections for elastic scattering of low-energy electrons by isopropanol (propan-2-ol). The experimental data were obtained using the relative flow technique with helium as the standard gas and a thin aperture as the collimating target gas source, which permits use of this method without the restrictions imposed by the relative flow pressure conditions on helium and the unknown gas. The differential cross sections were measured at energies of 1.5, 2, 3, 5, 6, 8, 10, 15, 20, and 30 eV and for scattering angles from 10 deg. to 130 deg. The cross sections were computedmore » over the same energy range employing the Schwinger multichannel method in the static-exchange plus polarization approximation. Agreement between theory and experiment is very good. The present data are compared with previously calculated and measured results for n-propanol, the other isomer of C{sub 3}H{sub 7}OH. Although the integral and momentum transfer cross sections for the isomers are very similar, the differential cross sections show a strong isomeric effect: In contrast to the f-wave behavior seen in scattering by n-propanol, d-wave behavior is observed in the cross sections of isopropanol. These results corroborate our previous observations in electron collisions with isomers of C{sub 4}H{sub 9}OH.« less

Callous-unemotional behavior and early-childhood onset of behavior problems: the role of parental harshness and warmth

PubMed Central

Waller, Rebecca; Gardner, Frances; Shaw, Daniel S.; Dishion, Thomas J.; Wilson, Melvin N.; Hyde, Luke W.

2014-01-01

Objective Youth with callous unemotional (CU) behavior are at risk of developing more severe forms of aggressive and antisocial behavior. Previous cross-sectional studies suggest that associations between parenting and conduct problems are less strong when children or adolescents have high levels of CU behavior, implying lower malleability of behavior compared to low-CU children. The current study extends previous findings by examining the moderating role of CU behavior on associations between parenting and behavior problems in a very young sample, both concurrently and longitudinally, and using a variety of measurement methods. Methods Data were collected from a multi-ethnic, high-risk sample at ages 2–4 (N = 364; 49% female). Parent-reported CU behavior was assessed at age 3 using a previously validated measure (Hyde et al., 2013). Parental harshness was coded from observations of parent-child interactions and parental warmth was coded from five-minute speech samples. Results In this large and young sample, CU behavior moderated cross-sectional correlations between parent-reported and observed warmth and child behavior problems. However, in cross-sectional and longitudinal models testing parental harshness, and longitudinal models testing warmth, there was no moderation by CU behavior. Conclusions The findings are in line with recent literature suggesting parental warmth may be important to child behavior problems at high levels of CU behavior. In general, however, the results of this study contrast with much of the extant literature and suggest that in young children, affective aspects of parenting appear to be related to emerging behavior problems, regardless of the presence of early CU behavior. PMID:24661288

Constitutive Behavior and Finite Element Analysis of FRP Composite and Concrete Members

PubMed Central

Ann, Ki Yong; Cho, Chang-Geun

2013-01-01

The present study concerns compressive and flexural constitutive models incorporated into an isoparametric beam finite element scheme for fiber reinforced polymer (FRP) and concrete composites, using their multi-axial constitutive behavior. The constitutive behavior of concrete was treated in triaxial stress states as an orthotropic hypoelasticity-based formulation to determine the confinement effect of concrete from a three-dimensional failure surface in triaxial stress states. The constitutive behavior of the FRP composite was formulated from the two-dimensional classical lamination theory. To predict the flexural behavior of circular cross-section with FRP sheet and concrete composite, a layered discretization of cross-sections was incorporated into nonlinear isoparametric beam finite elements. The predicted constitutive behavior was validated by a comparison to available experimental results in the compressive and flexural beam loading test. PMID:28788312

Application of cross-sectional time series modeling for the prediction of energy expenditure from heart rate and accelerometry

USDA-ARS?s Scientific Manuscript database

Accurate estimation of energy expenditure (EE) in children and adolescents is required for a better understanding of physiological, behavioral, and environmental factors affecting energy balance. Cross-sectional time series (CSTS) models, which account for correlation structure of repeated observati...

Nanoscale size effects on the mechanical properties of platinum thin films and cross-sectional grain morphology

NASA Astrophysics Data System (ADS)

Abbas, K.; Alaie, S.; Ghasemi Baboly, M.; Elahi, M. M. M.; Anjum, D. H.; Chaieb, S.; Leseman, Z. C.

2016-01-01

The mechanical behavior of polycrystalline Pt thin films is reported for thicknesses of 75 nm, 100 nm, 250 nm, and 400 nm. These thicknesses correspond to transitions between nanocrystalline grain morphology types as found in TEM studies. Thinner samples display a brittle behavior, but as thickness increases the grain morphology evolves, leading to a ductile behavior. During evolution of the morphology, dramatic differences in elastic moduli (105-160 GPa) and strengths (560-1700 MPa) are recorded and explained by the variable morphology. This work suggests that in addition to the in-plane grain size of thin films, the transitions in cross-sectional morphologies of the Pt films significantly affect their mechanical behavior.

The liquid fuel jet in subsonic crossflow

NASA Technical Reports Server (NTRS)

Nguyen, T. T.; Karagozian, A. R.

1990-01-01

An analytical/numerical model is described which predicts the behavior of nonreacting and reacting liquid jets injected transversely into subsonic cross flow. The compressible flowfield about the elliptical jet cross section is solved at various locations along the jet trajectory by analytical means for free-stream local Mach number perpendicular to jet cross section smaller than 0.3 and by numerical means for free-stream local Mach number perpendicular to jet cross section in the range 0.3-1.0. External and internal boundary layers along the jet cross section are solved by integral and numerical methods, and the mass losses due to boundary layer shedding, evaporation, and combustion are calculated and incorporated into the trajectory calculation. Comparison of predicted trajectories is made with limited experimental observations.

Analysis of temperature-dependent neutron transmission and self-indication measurements on tantalum at 2-keV neutron energy

NASA Technical Reports Server (NTRS)

Semler, T. T.

1973-01-01

The method of pseudo-resonance cross sections is used to analyze published temperature-dependent neutron transmission and self-indication measurements on tantalum in the unresolved region. In the energy region analyzed, 1825.0 to 2017.0 eV, a direct application of the pseudo-resonance approach using a customary average strength function will not provide effective cross sections which fit the measured cross section behavior. Rather a local value of the strength function is required, and a set of resonances which model the measured behavior of the effective cross sections is derived. This derived set of resonance parameters adequately represents the observed resonance hehavior in this local energy region. Similar analyses for the measurements in other unresolved energy regions are necessary to obtain local resonance parameters for improved reactor calculations. This study suggests that Doppler coefficients calculated by sampling from grand average statistical distributions over the entire unresolved resonance region can be in error, since significant local variations in the statistical distributions are not taken into consideration.

Comparative study of the neutrino-nucleon cross section at ultrahigh energies

NASA Astrophysics Data System (ADS)

Gonçalves, V. P.; Hepp, P.

2011-01-01

The high-energy neutrino cross section is a crucial ingredient in the calculation of the event rate in high-energy neutrino telescopes. Currently, there are several approaches that predict different behaviors for its magnitude for ultrahigh energies. In this paper, we present a comparison between the predictions based on linear Dokshitzer-Gribov-Lipatov-Altarelli-Parisi dynamics, nonlinear QCD, and the imposition of a Froissart-like behavior at high energies. In particular, we update the predictions based on the color glass condensate, presenting for the first time the results for σνN using the solution of the running coupling Balitsky-Kovchegov equation. Our results demonstrate that the current theoretical uncertainty for the neutrino-nucleon cross section reaches a factor of three for neutrino energies around 1011GeV and increases to a factor of five for 1013GeV.

Optimal cross-sectional sampling for river modelling with bridges: An information theory-based method

DOE Office of Scientific and Technical Information (OSTI.GOV)

Ridolfi, E.; Napolitano, F., E-mail: francesco.napolitano@uniroma1.it; Alfonso, L.

2016-06-08

The description of river topography has a crucial role in accurate one-dimensional (1D) hydraulic modelling. Specifically, cross-sectional data define the riverbed elevation, the flood-prone area, and thus, the hydraulic behavior of the river. Here, the problem of the optimal cross-sectional spacing is solved through an information theory-based concept. The optimal subset of locations is the one with the maximum information content and the minimum amount of redundancy. The original contribution is the introduction of a methodology to sample river cross sections in the presence of bridges. The approach is tested on the Grosseto River (IT) and is compared to existingmore » guidelines. The results show that the information theory-based approach can support traditional methods to estimate rivers’ cross-sectional spacing.« less

Single and double capture in F9+ + Ar collisions: Comparison of total capture with capture occurring from the Ar K shell

NASA Astrophysics Data System (ADS)

La Mantia, David; Kumara, Nuwan; Kayani, Asghar; Simon, Anna; Tanis, John

2016-05-01

Total cross sections for single and double capture, as well as the corresponding cross sections for capture resulting in the emission of an Ar K x ray, were measured. This work was performed at Western Michigan University with the use of the tandem Van de Graaff accelerator. A 45 MeV beam of fully-stripped fluorine ions was collided with argon gas molecules in a differentially pumped cell. Surface barrier detectors were used to observe the charge changed projectiles and a Si(Li) x-ray detector, placed at 90o to the incident beam, were used to measure coincidences with Ar K x rays. The total capture cross sections are compared to previously measured cross sections in the existing literature. The coincidence cross sections, considerably smaller than the total cross sections, are found to be nearly equal for single and double capture in contrast to the total cross sections, which vary by about an order of magnitude. Possible reasons for this behavior are discussed. Supported in part by the NSF.

Evolution processes of the corrosion behavior and structural characteristics of plasma electrolytic oxidation coatings on AZ31 magnesium alloy

NASA Astrophysics Data System (ADS)

Chen, Dong; Wang, Ruiqiang; Huang, Zhiquan; Wu, Yekang; Zhang, Yi; Wu, Guorui; Li, Dalong; Guo, Changhong; Jiang, Guirong; Yu, Shengxue; Shen, Dejiu; Nash, Philip

2018-03-01

Evolution processes of the corrosion behavior and structural characteristics of the plasma electrolytic oxidation (PEO) coated AZ31 magnesium alloy were investigated by using scanning electron microscope (SEM) equipped with energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), potentio-dynamic polarization curves and electrochemical impedance spectroscopy (EIS) measurements. Detached coating samples were fabricated by an electrochemical method and more details of the internal micro-structure of coatings were clearly observed on the fractured cross-section morphologies of the samples compared to general polished cross-section morphologies. Evolution mechanisms of the coating corrosion behavior in relation to the evolution of micro-structural characteristics were discussed in detail.

Calculation of Centrally Loaded Thin-Walled Columns Above the Buckling Limit

NASA Technical Reports Server (NTRS)

Reinitzhuber, F.

1945-01-01

When thin-walled columns formed from flanged sheet, such as used in airplane construction, are subjected to axial load, their behavior at failure varies according to the slenderness ratio. On long columns the axis deflects laterally while the cross section form is maintained; buckling results. The respective breaking load in the elastic range is computed by Euler's formula and for the plastic range by the Engesser- Karman formula. Its magnitude is essentially dependent upon the length. On intermediate length columns, especially where open sections are concerned, the cross section is distorted while the cross section form is preserved; twisting failure results. The buckling load in twisting is calculated according to Wagner and Kappus. On short columns the straight walls of low-bending resistance that form the column are deflected at the same time that the cross section form changes - buckling occurs without immediate failure. Then the buckling load of the total section computable from the buckling loads of the section walls is not the ultimate load; quite often, especially on thin-walled sections, it lies considerably higher and is secured by tests. Both loads, the buckling and the ultimate load are only in a small measure dependent upon length. The present report is an attempt to theoretically investigate the behavior of such short, thin-walled columns above the buckling load with the conventional calculating methods.

Direct contact as a moderator of extended contact effects: cross-sectional and longitudinal impact on outgroup attitudes, behavioral intentions, and attitude certainty.

PubMed

Christ, Oliver; Hewstone, Miles; Tausch, Nicole; Wagner, Ulrich; Voci, Alberto; Hughes, Joanne; Cairns, Ed

2010-12-01

Cross-group friendships (the most effective form of direct contact) and extended contact (i.e., knowing ingroup members who have outgroup friends) constitute two of the most important means of improving outgroup attitudes. Using cross-sectional and longitudinal samples from different intergroup contexts, this research demonstrates that extended contact is most effective when individuals live in segregated neighborhoods having only few, or no, direct friendships with outgroup members. Moreover, by including measures of attitudes and behavioral intentions the authors showed the broader impact of these forms of contact, and, by assessing attitude certainty as one dimension of attitude strength, they tested whether extended contact can lead not only to more positive but also to stronger outgroup orientations. Cross-sectional data showed that direct contact was more strongly related to attitude certainty than was extended contact, but longitudinal data showed both forms of contact affected attitude certainty in the long run.

Single and double diffractive dissociation and the problem of extraction of the proton-Pomeron cross-section

NASA Astrophysics Data System (ADS)

Petrov, V. A.; Ryutin, R. A.

2016-04-01

Diffractive dissociation processes are analyzed in the framework of covariant reggeization. We have considered the general form of hadronic tensor and its asymptotic behavior for t → 0 in the case of conserved tensor currents before reggeization. Resulting expressions for differential cross-sections of single dissociation (SD) process (pp → pM), double dissociation (DD) (pp → M1M2) and for the proton-Pomeron cross-section are given in detail, and corresponding problems of the approach are discussed.

Predictors of Parental Locus of Control in Mothers of Pre- and Early-Adolescents

PubMed Central

Freed, Rachel D.; Tompson, Martha C.

2016-01-01

Parental locus of control refers to parents’ perceived power and efficacy in child-rearing situations. This study explored parental locus of control and its correlates in 160 mothers of children ages 8–14 cross-sectionally and 1 year later. Maternal depression, maternal expressed emotion, and child internalizing and externalizing behavior were examined, along with a number of sociodemographic factors. Cross-sectional analyses indicated that external parental locus of control was associated with child externalizing behavior, maternal depression, less maternal education, lower income, and older maternal age. Longitudinal analyses showed that child age and externalizing behavior also predicted increases in external parental locus of control 1 year later. Finally, lower income and less parental perceived control predicted increases in child externalizing behavior over time. PMID:21229447

A Cross-sectional population-based investigation into behavioral change in amyotrophic lateral sclerosis: subphenotypes, staging, cognitive predictors, and survival.

PubMed

Burke, Tom; Pinto-Grau, Marta; Lonergan, Katie; Bede, Peter; O'Sullivan, Meabhdh; Heverin, Mark; Vajda, Alice; McLaughlin, Russell L; Pender, Niall; Hardiman, Orla

2017-05-01

Amyotrophic Lateral Sclerosis (ALS) is a clinically heterogeneous neurodegenerative disorder associated with cognitive and behavioral impairment. The primary aim of this study was to identify behavioral subphenotypes in ALS using a custom designed behavioral assessment tool (Beaumont Behavioural Inventory, BBI). Secondary aims were to (1) investigate the predictive nature of cognitive assessment on behavioral change, (2) report the behavioral profile associated with the C9 orf 72 expansion, (3) categorize behavioral change through disease staging, and (4) to investigate the relationship between cross-sectional behavioral classification and survival. A cross-sectional population-based research design was applied to examine behavioral data from ALS patients ( n  = 317) and healthy controls ( n  = 66). Patients were screened for the C9orf72 repeat expansion. A subcohort of ALS patients completed an extensive cognitive assessment battery ( n  = 65), to investigate predictors of behavior change. Principal component analysis (PCA) determined factors associated with altered behavior. Survival data were extracted from the Irish ALS register. No behavioral changes were reported in 180 patients (57%); 95 patients had mild-moderate behavioral change (30%); 42 patients met the cut-off for Clinically Severe Behavioral Change (13%), suggestive of a bvFTD diagnosis. The most frequently endorsed behaviors in ALS were reduced concern for hygiene (36.8%), irritability (36.2%), new unusual habits (33.4%), and increased apathy (31.1%). Five independent factors were identified through factor analysis. Social cognitive performance was predictive of behavior change ( P  = 0.031), yielding an R 2  = 0.188. Behavioral categorization (mild/moderate/severe) at the time of assessment was not associated with survival ( P  = 0.198). These data imply the presence of distinct subphenotypes of behavioral change in ALS, which most likely reflect subcategories of extramotor network disruption.

Factors associated with bystander behaviors of Korean youth in school bullying situations: A cross-sectional study.

PubMed

Yang, Seung Ae; Kim, Dong Hee

2017-08-01

The behaviors of bystanders can have important effects on their peers. The aim of this study was to identify psychosocial and contextual factors associated with 3 types of bystander behavior (bully followers, outsiders, and defenders of victims) among Korean youth. A descriptive and cross-sectional study was conducted among 416 7th and 8th-grade students from 1 middle school in Korea. The Rosenberg Self Esteem Scale, the Korean version of the Social Problem-Solving Inventory, and measurements of relationships with friends and teachers, empathy, concerns about being bullied, attitudes toward bullying, and bystander behaviors were all used in the assessment. Empathy, relationship of teachers, attitudes toward bullying, and concerns about being bullied were significantly associated with all 3 types of bystanders' behaviors. Although, self-esteem, social problem solving ability were significantly associated with just defender of victim behaviors. These results suggest that several significant factors to cultivate constructive bystander behaviors should be considered to develop effective antibullying intervention.

The wire material and cross-section effect on double delta closing loops regarding load and spring rate magnitude: an in vitro study.

PubMed

Ferreira, M do A

1999-03-01

The mechanical behavior of orthodontics closing loops, with three different wire materials (stainless steel, cobalt-chromium and titanium-molybdenum) and with different cross-sections and a double delta design, was studied in tension tests. The springs were stress-relieved, except the titanium-molybdenum wires. There were 72 sample springs, divided into 33 stainless steel, 26 cobalt-chromium and 13 titanium-molybdenum, activated at 0.5 mm intervals, from neutral position to 3.0 mm. It was hypothesized that loads, after spring activation, and spring rate, are dependent on cross-section, wire material, and activation. The analysis of variance and the Tukey-Kramer test were applied to verify the differences between all coupled averages of the loads. Regression analysis was also used to verify if closing loops behavior was in accordance with Hooke's law and to obtain the spring rate. The results show that the loads are dependent on activation, cross-section, and wire material. Titanium-molybdenum 0.017 x 0.025 inch (Ormco) springs showed the smallest loads and the best spring rate. (beta = 84.9 g/mm)

Transverse vibrations of shear-deformable beams using a general higher order theory

NASA Technical Reports Server (NTRS)

Kosmatka, J. B.

1993-01-01

A general higher order theory is developed to study the static and vibrational behavior of beam structures having an arbitrary cross section that utilizes both out-of-plane shear-dependent warping and in-plane (anticlastic) deformations. The equations of motion are derived via Hamilton's principle, where the full 3D constitutive relations are used. A simplified version of the general higher-order theory is also presented for beams having an arbitrary cross section that includes out-of-plane shear deformation but assumes that stresses within the cross section and in-plane deformations are negligible. This simplified model, which is accurate for long to moderately short wavelengths, offers substantial improvements over existing higher order theories that are limited to beams with thin rectangular cross sections. The current approach will be very useful in the study of thin-wall closed-cell beams such as airfoil-type sections where the magnitude of shear-related cross-sectional warping is significant.

Human Behavior, Learning, and the Developing Brain: Typical Development

ERIC Educational Resources Information Center

Coch, Donna, Ed.; Fischer, Kurt W., Ed.; Dawson, Geraldine, Ed.

2010-01-01

This volume brings together leading authorities from multiple disciplines to examine the relationship between brain development and behavior in typically developing children. Presented are innovative cross-sectional and longitudinal studies that shed light on brain-behavior connections in infancy and toddlerhood through adolescence. Chapters…

Longitudinal Associations between Externalizing Behavior and Dysfunctional Eating Attitudes and Behaviors: A Community-Based Study

ERIC Educational Resources Information Center

Marmorstein, Naomi R.; von Ranson, Kristin M.; Iacono, William G.; Succop, Paul A.

2007-01-01

This study investigated longitudinal associations between externalizing behavior and dysfunctional eating attitudes and behaviors. Participants were girls drawn from the community-based Minnesota Twin Family Study and assessed at ages 11, 14, and 17. Cross-sectional correlations indicated that the strength of the associations between externalizing…

Stress, Health Risk Behaviors, and Weight Status among Community College Students

ERIC Educational Resources Information Center

Pelletier, Jennifer E.; Lytle, Leslie A.; Laska, Melissa N.

2016-01-01

The objective of this study was to describe the relationship between stress, weight-related health risk behaviors (e.g., eating behaviors, physical activity, sedentary behavior, sleep, cigarette smoking, and binge drinking), and weight status using cross-sectional data on 2-year community college students enrolled in a randomized controlled weight…

Electron impact excitation of methane

NASA Technical Reports Server (NTRS)

Vuskovic, L.; Trajmar, S.

1983-01-01

A crossed molecular beam-electron beam apparatus was employed to examine the excitation cross-sections of CH4. Attention was given to 20, 30, and 200 eV impact energies at angles from 8-130 deg. Spectra were obtained in the elastic and inelastic realms as well as in the ionization continuum in the 12.99-15.0 eV energy-loss range. Differential cross-sections were also determined. The results are useful for modeling the behavior of CH4 in planetary atmospheres.

The presence of maladaptive eating behaviors after bariatric surgery in a cross sectional study: importance of picking or nibbling on weight regain.

PubMed

Conceição, Eva; Mitchell, James E; Vaz, Ana R; Bastos, Ana P; Ramalho, Sofia; Silva, Cátia; Cao, Li; Brandão, Isabel; Machado, Paulo P P

2014-12-01

Maladaptive eating behaviors after bariatric surgery are thought to compromise weight outcomes, but little is known about their frequency over time. This study investigates the presence of subjective binge eating (SBE), objective binge eating (OBE) and picking and nibbling (P&N) before surgery and at different time periods postoperative, and their association with weight outcomes. This cross-sectional study assessed a group of patients before surgery (n=61), and three post-operative groups: 1) 90 patients (27 with laparoscopic adjustable gastric band (LAGB) and 63 with Laparoscopic Roux-en-Y Gastric Bypass (LRYGB)) assessed during their 6month follow-up medical appointment; 2) 96 patients (34 LAGB and 62 LRYGB) assessed during their one year follow-up medical appointment; and 3) 127 patients (62 LAGB and 55 LRYGB) assessed during their second year follow-up medical appointment. Assessment included the Eating Disorders Examination and a set of self-report measures. In the first ten months after surgery fewer participants reported maladaptive eating behaviors. No OBEs were reported at 6months. SBE episodes were present in all groups. P&N was the most frequently reported eating behavior. Eating behavior (P&N) was significantly associated with weight regain, and non-behavioral variables were associated with weight loss. This study is cross-sectional study which greatly limits the interpretation of outcomes and no causal association can be made. However, a subgroup of postoperative patients report eating behaviors that are associated with greater weight regain. The early detection of these eating behaviors might be important in the prevention of problematic outcomes after bariatric surgery. Copyright © 2014 Elsevier Ltd. All rights reserved.

Urinary Estrogen Metabolites, Active and Sedentary Behaviors, and Breast Cancer Risk

Cancer.gov

A cross-sectional study of approximately 600 postmenopausal controls in the Breast Cancer Case-Control Study in Poland to assess urinary estrogen metabolites in relation to accelerometer-based measures of active and sedentary behaviors

Cross-Sectional Relationships Between Household Food Insecurity and Child BMI, Feeding Behaviors, and Public Assistance Utilization Among Head Start Children From Predominantly Hispanic and American Indian Communities in the CHILE Study

PubMed Central

Trappmann, Jessica L.; Jimenez, Elizabeth Yakes; Keane, Patricia C.; Cohen, Deborah A.; Davis, Sally M.

2016-01-01

Associations between food insecurity and overweight/obesity, feeding behaviors, and public food assistance utilization have been explored to a greater extent among adults and adolescents than among young children. This cross-sectional study examines a subset of pre-intervention implementation data (n = 347) among families participating in the Child Health Initiative for Lifelong Eating and Exercise (CHILE) study conducted in rural New Mexico among predominantly Hispanic and American Indian Head Start centers. No significant relationships emerged between food insecurity and child overweight/obesity, certain feeding behaviors, or public food assistance utilization. Additional research is necessary to understand relationships between food insecurity and child overweight/obesity status, use of public assistance benefits, and certain feeding behaviors among rural preschool-aged children in predominantly Hispanic and American Indian communities. PMID:27547288

Statistical investigation of avalanches of three-dimensional small-world networks and their boundary and bulk cross-sections

NASA Astrophysics Data System (ADS)

Najafi, M. N.; Dashti-Naserabadi, H.

2018-03-01

In many situations we are interested in the propagation of energy in some portions of a three-dimensional system with dilute long-range links. In this paper, a sandpile model is defined on the three-dimensional small-world network with real dissipative boundaries and the energy propagation is studied in three dimensions as well as the two-dimensional cross-sections. Two types of cross-sections are defined in the system, one in the bulk and another in the system boundary. The motivation of this is to make clear how the statistics of the avalanches in the bulk cross-section tend to the statistics of the dissipative avalanches, defined in the boundaries as the concentration of long-range links (α ) increases. This trend is numerically shown to be a power law in a manner described in the paper. Two regimes of α are considered in this work. For sufficiently small α s the dominant behavior of the system is just like that of the regular BTW, whereas for the intermediate values the behavior is nontrivial with some exponents that are reported in the paper. It is shown that the spatial extent up to which the statistics is similar to the regular BTW model scales with α just like the dissipative BTW model with the dissipation factor (mass in the corresponding ghost model) m2˜α for the three-dimensional system as well as its two-dimensional cross-sections.

Elastic positron scattering by C{sub 2}H{sub 2}: Differential cross sections and virtual state formation

DOE Office of Scientific and Technical Information (OSTI.GOV)

Carvalho, Claudia R.C. de; Varella, Marcio T. do N; Lima, Marco A.P.

2003-12-01

We present calculated elastic differential cross sections for positron-acetylene scattering, obtained by using the Schwinger multichannel method. Our results are in very good agreement with quasielastic experimental data of Kauppila et al. [Nucl. Instrum. Meth. Phys. Res. B 192, 162 (2002)]. We also discuss the existence of a virtual state (zero-energy resonance) in e{sup +}-C{sub 2}H{sub 2} collisions, based on the behavior of the integral cross section and of the s-wave phase shift. As expected the fixed-nuclei cross section and annihilation parameter (Z{sub eff}) present the same energy dependence at very low impact energies. As the virtual state energy approachesmore » zero, the magnitude of both cross section and Z{sub eff} are extremely enhanced (at zero impact energy). The possibility of shifting from a low-lying virtual state to a shallow bound state is not expected to significantly affect room-temperature annihilation rates.« less

Young People's Sexual Risk Behaviors in Nigeria

ERIC Educational Resources Information Center

Abdulraheem, I. S.; Fawole, O. I.

2009-01-01

The prevalence and correlates of HIV-related risk behaviors among adolescents and youths in Nigeria are poorly documented. This study aims at determining the prevalence and correlates of HIV-related risk behaviors among adolescents and youths in order to plan appropriate intervention measures. This is a descriptive cross-sectional survey using…

The association of outdoor vegetation with ADHD-related behavior among children living in an urban community

EPA Science Inventory

Introduction: Emerging research supports potential benefits of green space on children's behavior. Methods: We evaluated the cross-sectional association of outdoor vegetation (OV) and distance to parks with ADHD-like behavior in 560 eight-year-olds from a prospective, sociodemogr...

Characteristics Associated with Sleep Duration, Chronotype, and Social Jet Lag in Adolescents

ERIC Educational Resources Information Center

Malone, Susan Kohl; Zemel, Babette; Compher, Charlene; Souders, Margaret; Chittams, Jesse; Thompson, Aleda Leis; Lipman, Terri H.

2016-01-01

Sleep is a complex behavior with numerous health implications. Identifying sociodemographic and behavioral characteristics of sleep is important for determining those at greatest risk for sleep-related health disparities. In this cross-sectional study, general linear models were used to examine sociodemographic and behavioral characteristics…

The Effects of Developmental Quotient and Diagnostic Criteria on Challenging Behaviors in Toddlers with Developmental Disabilities

ERIC Educational Resources Information Center

Medeiros, Kristen; Kozlowski, Alison M.; Beighley, Jennifer S.; Rojahn, Johannes; Matson, Johnny L.

2012-01-01

Previous research has found that individuals with intellectual disability and/or autism spectrum disorder (ASD), and those with greater symptom severity within these diagnoses, show higher rates of aggressive/destructive behavior, stereotypic behavior, and self-injurious behavior. In this exploratory cross-sectional study, toddlers at-risk for a…

Suicide ideation and attempt in a community cohort of urban Aboriginal youth: a cross-sectional study.

PubMed

Luke, Joanne N; Anderson, Ian P; Gee, Graham J; Thorpe, Reg; Rowley, Kevin G; Reilly, Rachel E; Thorpe, Alister; Stewart, Paul J

2013-01-01

There has been increasing attention over the last decade on the issue of indigenous youth suicide. A number of studies have documented the high prevalence of suicide behavior and mortality in Australia and internationally. However, no studies have focused on documenting the correlates of suicide behavior for indigenous youth in Australia. To examine the prevalence of suicide ideation and attempt and the associated factors for a community1 cohort of Koori2 (Aboriginal) youth. Data were obtained from the Victorian Aboriginal Health Service (VAHS) Young People's Project (YPP), a community initiated cross-sectional data set. In 1997/1998, self-reported data were collected for 172 Koori youth aged 12-26 years living in Melbourne, Australia. The data were analyzed to assess the prevalence of current suicide ideation and lifetime suicide attempt. Principal components analysis (PCA) was used to identify closely associated social, emotional, behavioral, and cultural variables at baseline and Cox regression modeling was then used to identify associations between PCA components and suicide ideation and attempt. Ideation and attempt were reported at 23.3% and 24.4%, respectively. PCA yielded five components: (1) emotional distress, (2) social distress A, (3) social distress B, (4) cultural connection, (5) behavioral. All were positively and independently associated with suicide ideation and attempt, while cultural connection showed a negative association. Suicide ideation and attempt were common in this cross-section of indigenous youth with an unfavorable profile for the emotional, social, cultural, and behavioral factors.

Design of the Cross Section Shape of AN Aluminum Crash Box for Crashworthiness Enhancement of a CAR

NASA Astrophysics Data System (ADS)

Kim, S. B.; Huh, H.; Lee, G. H.; Yoo, J. S.; Lee, M. Y.

This paper deals with the crashworthiness of an aluminum crash box for an auto-body with the various shapes of cross section such as a rectangle, a hexagon and an octagon. First, crash boxes with various cross sections were tested with numerical simulation to obtain the energy absorption capacity and the mean load. In case of the simple axial crush, the octagon shape shows higher mean load and energy absorption than the other two shapes. Secondly, the crash boxes were assembled to a simplified auto-body model for the overall crashworthiness. The model consists of a bumper, crash boxes, front side members and a sub-frame representing the behavior of a full car at the low speed impact. The analysis result shows that the rectangular cross section shows the best performance as a crash box which deforms prior to the front side member. The hexagonal and octagonal cross sections undergo torsion and local buckling as the width of cross section decreases while the rectangular cross section does not. The simulation result of the rectangular crash box was verified with the experimental result. The simulation result shows close tendency in the deformed shape and the load-displacement curve to the experimental result.

Calculation of the extinction cross section and lifetime of a gold nanoparticle using FDTD simulations

DOE Office of Scientific and Technical Information (OSTI.GOV)

Radhakrishnan, Archana, E-mail: anju.archana@gmail.com; Murugesan, Dr V., E-mail: murugesh@serc.iisc.in

The electromagnetic theory of light explains the behavior of light in most of the domains quite accurately. The problem arises when the exact solution of the Maxwell's equation is not present, in case of objects with arbitrary geometry. To find the extinction cross-section and lifetime of the gold nanoparticle, the software FDTD solutions 8.6 by Lumerical is employed. The extinction cross-sections and lifetimes of Gold nanospheres of different sizes and arrangements are studied using pulse lengths of the order of femtoseconds. The decay constant and other properties are compared. Further, the lifetimes are calculated using frequency and time domain calculations.

Exploring incomplete fusion fraction in 6,7Li induced nuclear reactions

NASA Astrophysics Data System (ADS)

Parkar, V. V.; Jha, V.; Kailas, S.

2017-11-01

We have included breakup effects explicitly to simultaneously calculate the measured cross-sections of the complete fusion, incomplete fusion, and total fusion for 6,7Li projectiles on various targets using the Continuum Discretized Coupled Channels method. The breakup absorption cross-sections obtained with different choices of short range imaginary potentials are utilized to evaluate the individual α-capture and d/t-capture cross-sections and compare with the measured data. It is interesting to note, while in case of 7Li projectile the cross-sections for triton-ICF/triton-capture is far more dominant than α-ICF/α-capture at all energies, similar behavior is not observed in case of 6Li projectile for the deuteron-ICF/deuteron-capture and α-ICF/α-capture. Both these observations are also corroborated by the experimental data for all the systems studied.

Resonance charge transfer, transport cross sections, and collision integrals for N(+)(3P)-N(4S0) and O(+)(4S0)-O(3P) interactions

NASA Technical Reports Server (NTRS)

Stallcop, James R.; Partridge, Harry; Levin, Eugene

1991-01-01

N2(+) and O2(+) potential energy curves have been constructed by combining measured data with the results from electronic structure calculations. These potential curves have been employed to determine accurate charge exchange cross sections, transport cross sections, and collision integrals for ground state N(+)-N and O(+)-O interactions. The cross sections have been calculated from a semiclassical approximation to the scattering using a computer code that fits a spline curve through the discrete potential data and incorporates the proper long-range behavior of the interactions forces. The collision integrals are tabulated for a broad range of temperatures 250-100,000 K and are intended to reduce the uncertainty in the values of the transport properties of nonequilibrium air, particularly at high temperatures.

Disturbed eating attitudes and behaviors in South Korean boys and girls: a school-based cross-sectional study.

PubMed

Yang, Su-Jin; Kim, Jae-Min; Yoon, Jin-Sang

2010-05-01

This study was designed to assess the prevalence and correlates of disturbed eating attitudes and behaviors in South Korean students. In a cross-sectional survey, 2,226 fourth and seventh grade students filled out questionnaires on eating attitudes and behaviors (Eating Attitude Test -26, EAT-26), coping strategies, fear of being overweight, behavioral problems, anxiety, depression, and self-esteem. Disturbed eating attitudes and behaviors were found in 7 percent of students. In the multivariate analyses, disturbed eating attitudes and behaviors were associated with the passive coping strategies, fear of being overweight, total behavioral difficulties, fourth grade, and high socioeconomic status (SES). Differences in the associations were found between boys and girls. There were significant associations between elevated EAT-26 scores and passive coping strategies, desired underweight body mass index (BMI), and low SES in boys; and between elevated EAT-26 scores and passive coping strategies, fear of being overweight, behavioral problems, being in the fourth grade, and high and low SES in girls. In South Korean children, disturbed eating attitudes and behaviors were associated with various psychological and sociocultural factors; some gender-related differences are also evident.

Autism Symptoms across Adulthood in Men with Fragile X Syndrome: A Cross-Sectional Analysis

ERIC Educational Resources Information Center

Hartley, Sigan L.; Wheeler, Anne C.; Mailick, Marsha R.; Raspa, Melissa; Mihaila, Iulia; Bishop, Ellen; Bailey, Donald B.

2015-01-01

A cross-sectional analysis was used to examine age-related differences in ASD symptoms and corresponding differences in disruptive behavior and social skills in 281 adult men with fragile X syndrome. Four age groups were created: 18-21, 22-29, 30-39, and 40-49 years. The 18-21 year-old group was reported to have more impairments in verbal…

Prediction of the Stress-Strain Behavior of Open-Cell Aluminum Foam under Compressive Loading and the Effects of Various RVE Boundary Conditions

NASA Astrophysics Data System (ADS)

Hamidi Ghaleh Jigh, Behrang; Farsi, Mohammad Ali; Hosseini Toudeshky, Hossein

2018-05-01

The prediction of the mechanical behavior of metallic foams with realistic microstructure and the effects of various boundary conditions on the mechanical behavior is an important and challenging issue in modeling representative volume elements (RVEs). A numerical investigation is conducted to determine the effects of various boundary conditions and cell wall cross sections on the compressive mechanical properties of aluminum foam, including the stiffness, plateau stress and onset strain of densification. The open-cell AA6101-T6 aluminum foam Duocel is used in the analyses in this study. Geometrical characteristics including the cell size, foam relative density, and cross-sectional shape and thickness of the cell walls are extracted from images of the foam. Then, the obtained foam microstructure is analyzed as a 2D model. The ligaments are modeled as shear deformable beams with elastic-plastic material behavior. To prevent interpenetration of the nodes and walls inside the cells with large deformations, self-contact-type frictionless interaction is stipulated between the internal surfaces. Sensitivity analyses are performed using several boundary conditions and cells wall cross-sectional shapes. The predicted results from the finite element analyses are compared with the experimental results. Finally, the most appropriate boundary conditions, leading to more consistent results with the experimental data, are introduced.

Prediction of the Stress-Strain Behavior of Open-Cell Aluminum Foam under Compressive Loading and the Effects of Various RVE Boundary Conditions

NASA Astrophysics Data System (ADS)

Hamidi Ghaleh Jigh, Behrang; Farsi, Mohammad Ali; Hosseini Toudeshky, Hossein

2018-04-01

The prediction of the mechanical behavior of metallic foams with realistic microstructure and the effects of various boundary conditions on the mechanical behavior is an important and challenging issue in modeling representative volume elements (RVEs). A numerical investigation is conducted to determine the effects of various boundary conditions and cell wall cross sections on the compressive mechanical properties of aluminum foam, including the stiffness, plateau stress and onset strain of densification. The open-cell AA6101-T6 aluminum foam Duocel is used in the analyses in this study. Geometrical characteristics including the cell size, foam relative density, and cross-sectional shape and thickness of the cell walls are extracted from images of the foam. Then, the obtained foam microstructure is analyzed as a 2D model. The ligaments are modeled as shear deformable beams with elastic-plastic material behavior. To prevent interpenetration of the nodes and walls inside the cells with large deformations, self-contact-type frictionless interaction is stipulated between the internal surfaces. Sensitivity analyses are performed using several boundary conditions and cells wall cross-sectional shapes. The predicted results from the finite element analyses are compared with the experimental results. Finally, the most appropriate boundary conditions, leading to more consistent results with the experimental data, are introduced.

Cross Sections and Transport Properties of BR- Ions in AR

NASA Astrophysics Data System (ADS)

Jovanovic, Jasmina; Stojanovic, Vladimir; Raspopovic, Zoran; Petrovic, Zoran

2014-10-01

We have used a combination of a simple semi-analytic theory - Momentum Transfer Theory (MTT) and exact Monte Carlo (MC) simulations to develop Br- in Ar momentum transfer cross section based on the available data for reduced mobility at the temperature T = 300 K over the range 10 Td <= E / N <= 300 Td. At very low energies, we have extrapolated obtained cross sections towards Langevin's cross section. Also, we have extrapolated data to somewhat higher energies based on behavior of similar ions in similar gases and by the addition of the total detachment cross section that was used from the threshold around 7.7 eV. Relatively complete set was derived which can be used in modeling of plasmas by both hybrid, particle in cell (PIC) and fluid codes. A good agreement between calculated and measured ion mobilities and longitudinal diffusion coefficients is an independent proof of the validity of the cross sections that were derived for the negative ion mobility data. In addition to transport coefficients we have also calculated the net rate coefficients of elastic scattering and detachment. Author acknowledge Ministry of Education, Science and Technology, Proj. Nos. 171037 and 410011.

Secondary neutron-production cross sections from heavy-ioninteractions in composite targets.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Heilbronn, L.; Iwata, Y.; Iwase,H.

Secondary neutron-production cross-sections have been measured from interactions of 290 MeV/nucleon C and 600 MeV/nucleon Ne in a target composed of simulated Martian regolith and polyethylene, and from 400 MeV/nucleon Ne interactions in wall material from the International Space Station. The data were measured between 5 and 80 deg in the laboratory. We report the double-differential cross sections, angular distributions, and total neutron-production cross sections from all three systems. The spectra from all three systems exhibit behavior previously reported in other heavy-ion, neutron production experiments; namely, a peak at forward angles near the energy corresponding to the beam velocity, withmore » the remaining spectra generated by pre-equilibrium and equilibrium processes. The double differential cross sections are fitted with a moving-source parameterization. Also reported are the data without corrections for neutron flux attenuation in the target and other intervening materials, and for neutron production in non-target materials near the target position. These uncorrected spectra are compared with SHIELD-HIT and PHITS transport model calculations. The transport model calculations reproduce the spectral shapes well, but, on average, underestimate the magnitudes of the cross sections.« less

Secondary neutron-production cross sections from heavy-ion interactions in composite targets

DOE Office of Scientific and Technical Information (OSTI.GOV)

Heilbronn, L.; Iwata, Y.; Murakami, T.

Secondary neutron-production cross sections have been measured from interactions of 290 MeV/nucleon C and 600 MeV/nucleon Ne in a target composed of simulated Martian regolith and polyethylene, and from 400 MeV/nucleon Ne interactions in wall material from the International Space Station. The data were measured between 5 deg. and 80 deg. in the laboratory. We report the double-differential cross sections, angular distributions, and total neutron-production cross sections from all three systems. The spectra from all three systems exhibit behavior previously reported in other heavy-ion neutron-production experiments, namely, a peak at forward angles near the energy corresponding to the beam velocity,more » with the remaining spectra generated by pre-equilibrium and equilibrium processes. The double-differential cross sections are fitted with a moving-source parametrization. Also reported are the data without corrections for neutron flux attenuation in the target and other intervening materials and for neutron production in nontarget materials near the target position. These uncorrected spectra are compared with SHIELD-HIT and PHITS transport model calculations. The transport model calculations reproduce the spectral shapes well but, on average, underestimate the magnitudes of the cross sections.« less

Correction of the near threshold behavior of electron collisional excitation cross-sections in the plane-wave Born approximation

NASA Astrophysics Data System (ADS)

Kilcrease, D. P.; Brookes, S.

2013-12-01

The modeling of NLTE plasmas requires the solution of population rate equations to determine the populations of the various atomic levels relevant to a particular problem. The equations require many cross sections for excitation, de-excitation, ionization and recombination. A simple and computational fast way to calculate electron collisional excitation cross-sections for ions is by using the plane-wave Born approximation. This is essentially a high-energy approximation and the cross section suffers from the unphysical problem of going to zero near threshold. Various remedies for this problem have been employed with varying degrees of success. We present a correction procedure for the Born cross-sections that employs the Elwert-Sommerfeld factor to correct for the use of plane waves instead of Coulomb waves in an attempt to produce a cross-section similar to that from using the more time consuming Coulomb Born approximation. We compare this new approximation with other, often employed correction procedures. We also look at some further modifications to our Born Elwert procedure and its combination with Y.K. Kim's correction of the Coulomb Born approximation for singly charged ions that more accurately approximate convergent close coupling calculations.

The Development and Preliminary Validation of the Behavior, Environment, and Changeability Survey (BECS)

ERIC Educational Resources Information Center

Walsh, Jennifer R.; Hebert, Angel; Byrd-Bredbenner, Carol; Carey, Gale; Colby, Sarah; Brown-Esters, Onikia N.; Greene, Geoffrey; Hoerr, Sharon; Horacek, Tanya; Kattelmann, Kendra; Kidd, Tandalayo; Koenings, Mallory; Phillips, Beatrice; Shelnutt, Karla P.; White, Adrienne A.

2012-01-01

Objective: To develop and test the validity of the Behavior, Environment, and Changeability Survey (BECS) for identifying the importance and changeability of nutrition, exercise, and stress management behavior and related aspects of the environment. Design: A cross-sectional, online survey of the BECS and selected validated instruments. Setting:…

Sexually Transmitted Diseases and Risk Behaviors among California Farmworkers: Results from a Population-Based Survey

ERIC Educational Resources Information Center

Brammeier, Monique; Chow, Joan M.; Samuel, Michael C.; Organista, Kurt C.; Miller, Jamie; Bolan, Gail

2008-01-01

Context: The prevalence of sexually transmitted diseases and associated risk behaviors among California farmworkers is not well described. Purpose: To estimate the prevalence of sexually transmitted diseases (STDs) and associated risk behaviors among California farmworkers. Methods: Cross-sectional analysis of population-based survey data from 6…

Relationship among Food-Safety Knowledge, Beliefs, and Risk-Reduction Behavior in University Students in Japan

ERIC Educational Resources Information Center

Takeda, Sayaka; Akamatsu, Rie; Horiguchi, Itsuko; Marui, Eiji

2011-01-01

Objective: To identify whether university students who have both food-safety knowledge and beliefs perform risk-reduction behaviors. Design: Cross-sectional research using a questionnaire that included food-safety knowledge, perceptions, risk-reduction behavior, stages for the selection of safer food based on the Transtheoretical Model, and…

Risky Behaviors among Adolescents in the Midwest: Personal Gratification or Peer Pressure?

ERIC Educational Resources Information Center

May, David C.; Nichols, Joe D.; Eltzroth, Patricia L.

The present study was a cross-sectional examination of the causes of adolescent participation in risky behaviors, using a diverse sample of adolescents from a Midwestern state. This research compared the relative effects of a traditional explanation of deviant behavior, differential association theory, with a modern derivative, nonsocial…

Associations between Adolescent Risk Behaviors and Injury: The Modifying Role of Disability

ERIC Educational Resources Information Center

Raman, Sudha R.; Boyce, William F.; Pickett, William

2009-01-01

Background: Adolescents with disabilities are at risk for poor health outcomes including injury. The objective of this study was to examine if disability status modifies the association between risk behavior and injury among adolescents. Methods: The cross-sectional Health Behavior in School-Aged Children Survey was administered to a…

Bullying Behavior, Parents' Work Hours and Early Adolescents' Perceptions of Time Spent with Parents

ERIC Educational Resources Information Center

Christie-Mizell, C. Andre; Keil, Jacqueline M.; Laske, Mary Therese; Stewart, Jennifer

2011-01-01

This research investigates the relationships among bullying behavior, mother's and father's work hours, and early adolescents' perceptions of whether they spend sufficient time with their parents. In cross-sectional models, we find maternal work hours are modestly associated with increases in bullying behavior. However, in more rigorous change…

Bullying and Victimization Behaviors in Boys and Girls at South Korean Primary Schools

ERIC Educational Resources Information Center

Yang, Su-Jin; Kim, Jae-Min; Kim, Sung-Wan; Shin, Il-Seon; Yoon, Jin-Sang

2006-01-01

Objective: To investigate the prevalence and correlates of bullying and victimization behaviors in boys and girls at South Korean primary schools. Method: In a cross-sectional survey, 1,344 fourth-grade primary school children completed a questionnaire on self-reported bullying and victimization behaviors, depression, anxiety, body image, coping…

Factors Associated with Aggressive Behavior among Nursing Home Residents with Dementia

ERIC Educational Resources Information Center

Whall, Ann L.; Colling, Kathleen B.; Kolanowski, Ann; Kim, HyoJeong; Hong, Gwi-Ryung Son; DeCicco, Barry; Ronis, David L.; Richards, Kathy C.; Algase, Donna; Beck, Cornelia

2008-01-01

Purpose: In an attempt to more thoroughly describe aggressive behavior in nursing home residents with dementia, we examined background and proximal factors as guided by the Need-Driven Dementia-Compromised Behavior model. Design and Methods: We used a multivariate cross-sectional survey with repeated measures; participants resided in nine randomly…

Online Testing of Hungarian Children's Prosocial Behavior

ERIC Educational Resources Information Center

Zsolnai, Anikó; Kasik, László

2017-01-01

The aim of our cross-sectional investigation was to explore prosocial behavior at the ages of 9, 11, and 13, and to reveal associations between this social behavior and some background variables such as age, gender, and parents' educational attainment. The participants were 185 Hungarian students and their teachers. Two Likert-type questionnaires…

Lifestyle and Clinical Health Behaviors and PSA Tests

ERIC Educational Resources Information Center

Norris, Cynthia; McFall, Stephanie

2006-01-01

This study assessed the association of lifestyle and clinical health behaviors with prostate specific antigen (PSA) tests. The study used cross-sectional data from the 2002 Behavioral Risk Factor Surveillance System (BRFSS). We used Stata 8.0 to take into account the complex sample design in analyses. Both lifestyle and clinical health behaviors…

Time perspective, optimistic bias, and self-control among different statuses of university smokers in China: a cross-sectional study.

PubMed

Xu, Ying; Yang, Yang; Ma, Xiao

2018-01-09

Risk behavior often seems 'self-defeating' to the observers. Most people understand the basic health-related knowledge, but some of them still choose to continue risk behaviors, especially for the young. This study aimed to examine time perspective, optimism bias and self control correlated with smoking behavior in Chinese college students. A cross-sectional survey enrolling 3016 university students in Chengdu City, Sichuan Province, China. Influence Factors were identified using multiple logistic regression analyses. Prevalence of current smoking was 20.92% (631 smokers), including 272 daily smokers (9.02%) and 359 non-daily smokers (11.90%). Future-oriented time perspective, general capacity for self-discipline, reliability and ethnicity were protective factors of smoking behavior. Possibility of self-suffering diseases and gender were risk factors of smoking behavior. Smoking in University of Chengdu, China is a severe problem. Results in this research have suggested that irrespective of the smoking level, improving health-related knowledge, time management awareness and self-control ability may contribute to reducing the prevalence of smoking behavior.

Correlates of self-efficacy for disease management in adolescent/young adult cancer survivors: A systematic review.

PubMed

Herts, Kate L; Khaled, Mona M; Stanton, Annette L

2017-03-01

The primary objective of this review was to summarize the literature regarding factors associated with self-efficacy for disease management (SEDM) in cross-sectional studies and the efficacy/effectiveness of psychosocial interventions that are designed to improve SEDM in adolescent and young adult (AYA) cancer survivors. The secondary aim was to assess the quality of included studies. We conducted a systematic review using PsycINFO and PubMed to identify studies for review. Eligible studies were conducted in AYA cancer survivors ages 15 to 39; included a measure of SEDM assessed as an outcome or in a cross-sectional analysis; and were published in a peer-reviewed, English-language journal. From the 2,910 records screened, 7 cross-sectional studies and 4 intervention studies met criteria for inclusion. Eleven of the 12 SEDM measures in the studies were author-constructed, limiting the ability to draw conclusions across studies. All cross-sectional studies met at least 21 of 26 relevant quality assessment criteria, and intervention studies met between 4 and 11 of 14 criteria. Cross-sectional findings indicate that SEDM is positively associated with health-promoting behaviors and inversely related to physical and mental health problems. The intervention studies demonstrated that behavioral and educational interventions have the potential to increase SEDM. Directions for research include the need for validated measures of SEDM for AYA cancer survivors, as well as interventions that target both the health care team's and the patient's role in promoting SEDM. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Inelastic collisions of positrons with one-valence-electron targets

NASA Technical Reports Server (NTRS)

Abdel-Raouf, Mohamed Assad

1990-01-01

The total elastic and positronium formation cross sections of the inelastic collisions between positrons and various one-valence-electron atoms, (namely hydrogen, lithium, sodium, potassium and rubidium), and one-valence-electron ions, (namely hydrogen-like, lithium-like and alkaline-earth positive ions) are determined using an elaborate modified coupled-static approximation. Special attention is devoted to the behavior of the Ps cross sections at the energy regions lying above the Ps formation thresholds.

Temperature-tuned Maxwell-Boltzmann neutron spectra for kT ranging from 30 up to 50 keV for nuclear astrophysics studies.

PubMed

Martín-Hernández, G; Mastinu, P F; Praena, J; Dzysiuk, N; Capote Noy, R; Pignatari, M

2012-08-01

The need of neutron capture cross section measurements for astrophysics motivates present work, where calculations to generate stellar neutron spectra at different temperatures are performed. The accelerator-based (7)Li(p,n)(7)Be reaction is used. Shaping the proton beam energy and the sample covering a specific solid angle, neutron activation for measuring stellar-averaged capture cross section can be done. High-quality Maxwell-Boltzmann neutron spectra are predicted. Assuming a general behavior of the neutron capture cross section a weighted fit of the spectrum to Maxwell-Boltzmann distributions is successfully introduced. Copyright © 2012 Elsevier Ltd. All rights reserved.

Behavior of very high energy hadronic cross-sections

NASA Astrophysics Data System (ADS)

Stodolsky, L.

2017-10-01

Analysis of the data for proton and antiproton scattering leads to a simple picture for very high energy hadronic cross-sections. There is, asymptotically, a simple “black disc” with a smooth “edge”. The radius of the “disc” is expanding logarithmically with energy, while the “edge” is constant. These conclusions follow from extensive fits to accelerator and cosmic ray data, combined with the observation that a certain combination of elastic and total cross-sections allows extraction of the “edge”. An interesting feature of the results is that the “edge” is rather large compared to the “disc”. This explains the slow approach to “asymptopia” where the “disc” finally dominates.

Risk factors for adult overweight and obesity in the Quebec Family Study: have we been barking up the wrong tree?

PubMed

Chaput, Jean-Philippe; Leblanc, Claude; Pérusse, Louis; Després, Jean-Pierre; Bouchard, Claude; Tremblay, Angelo

2009-10-01

The aim of this study was to determine the independent contribution of previously reported risk factors for adult overweight and obesity. A cross-sectional (n=537) and a longitudinal (n=283; 6-year follow-up period) analysis was performed for nine risk factors for overweight and obesity assessed in adult participants (aged 18-64 years) of the Quebec Family Study (QFS). The main outcome measure was overweight/obesity, defined as a BMI>or=25 kg/m2. Using logistic regression analysis adjusted for age, sex, and socioeconomic status, short sleep duration, high disinhibition eating behavior, low dietary calcium intake, high susceptibility to hunger behavior, nonparticipation in high-intensity physical exercise, high dietary restraint behavior, nonconsumption of multivitamin and dietary supplements, high dietary lipid intake, and high alcohol intake were all significantly associated with overweight and obesity in the cross-sectional sample. The analysis of covariance adjusted for age, socioeconomic status, and all other risk factors revealed that only individuals characterized by short sleep duration, high disinhibition eating behavior, and low dietary calcium intake had significantly higher BMI compared to the reference category in both sexes. Over the 6-year follow-up period, short-duration sleepers, low calcium consumers, and those with a high disinhibition and restraint eating behavior score were significantly more likely to gain weight and develop obesity. These results show that excess body weight or weight gain results from a number of obesogenic behaviors that have received considerable attention over the past decade. They also indicate that the four factors, which have the best predictive potential of variations in BMI, be it in a cross-sectional or a longitudinal analytical design, do not have a "caloric value" per se.

Susceptibility to upper respiratory tract infection and touching of the eyes or nose: a cross-sectional study of Japanese workers.

PubMed

Fukunaka, Yasushi; Sawada, Susumu S; Nishiura, Chihiro; Noguchi, Jun; Tsukamoto, Koji; Otsuji, Yutaka; Marui, Eiji

2013-01-01

This study was a cross-sectional survey of Japanese workers regarding the relationship between touching the eyes or nose and susceptibility to URTI in workers. The survey respondents were 4,663 Japanese workers. Subjects were surveyed via a self-administered questionnaire regarding their susceptibility to URTI and how often they touched their eyes or nose. In addition, subjects were surveyed regarding their preventive behaviors and routine behaviors thought to be associated with URTIs. A multiple logistic regression model was used to assess the relationship between susceptibility to URTI and how often the eyes or nose are touched. Responses from 3,663 individuals who answered the self-administered questionnaire were analyzed. There were 1,590 individuals (42.9%) with a "frequent incidence of URTIs", defined as URTIs more than once a year. In terms of how often the eyes or nose are touched, the odds ratios (95% CI) for a frequent incidence of URTIs among the groups responding "sometimes" and "often" were 1.41 (1.21-1.63) and 1.96 (1.59-2.42) (trend test: p<0.001) compared with the groups responding "never" and "almost never". Multivariate-adjusted odds ratios adjusted for confounding factors, i.e., behaviors to prevent URTIs, routine behaviors associated with URTIs, age, sex and BMI, were 1.33 (1.14-1.54) and 1.69 (1.36-2.09) (trend test: p<0.001). The present cross-sectional study indicates that susceptibility to URTI and how often the eyes or nose are touched are significantly associated in Japanese workers, independent of preventive behaviors and routine behaviors associated with URTIs

Does Parental Divorce Increase Risk Behaviors among 15/16 and 18/19 year-old Adolescents? A Study from Oslo, Norway.

PubMed

Zeratsion, Henok; Bjertness, Cecilie B; Lien, Lars; Haavet, Ole R; Dalsklev, Madeleine; Halvorsen, Jon A; Bjertness, Espen; Claussen, Bjørgulf

2014-01-01

Several studies have reported an increase in risk behaviors among adolescents after experience of parental divorce. The aim of the study was to investigate whether parental divorce is associated with risk behavior among adolescents independent of mental health problems, first when early divorce was experienced, and second after experience of late parental divorce. One prospective (n=1861) and one cross-sectional study (n=2422) were conducted using data from two Young-HUBRO surveys in Oslo, Norway. All 15/16 year-old 10(th) grade students who participated in the first survey in the school year 2000/01 were followed-up in 2004 when they were 18/19 year-olds. The follow-up rate was 68%. The prospective study investigated the influence of late parental divorce that occurred between the age of 15/16 and 18/19. In the cross-sectional study we focused on early parental divorce that occurred before the participants were 15/16 year-old. In the prospective study we could not discern a significant association between experiencing late parental divorce and an increase in risk behaviors among 18/19 year-old adolescents. In the cross-sectional study parental divorce was significantly associated with cigarette smoking and using doping agents. Parental divorce that occurs when the children of divorced parents are 15/16 year-old or younger is associated with an increase in cigarette smoking and use of doping agents. However, no evidence of significant association is found between experience of late parental divorce and risk behaviors in late adolescence.

Does Parental Divorce Increase Risk Behaviors among 15/16 and 18/19 year-old Adolescents? A Study from Oslo, Norway

PubMed Central

Zeratsion, Henok; Bjertness, Cecilie B; Lien, Lars; Haavet, Ole R; Dalsklev, Madeleine; Halvorsen, Jon A; Bjertness, Espen; Claussen, Bjørgulf

2014-01-01

Background: Several studies have reported an increase in risk behaviors among adolescents after experience of parental divorce. The aim of the study was to investigate whether parental divorce is associated with risk behavior among adolescents independent of mental health problems, first when early divorce was experienced, and second after experience of late parental divorce. Method: One prospective (n=1861) and one cross-sectional study (n=2422) were conducted using data from two Young-HUBRO surveys in Oslo, Norway. All 15/16 year-old 10th grade students who participated in the first survey in the school year 2000/01 were followed-up in 2004 when they were 18/19 year-olds. The follow-up rate was 68%. The prospective study investigated the influence of late parental divorce that occurred between the age of 15/16 and 18/19. In the cross-sectional study we focused on early parental divorce that occurred before the participants were 15/16 year-old. Results:In the prospective study we could not discern a significant association between experiencing late parental divorce and an increase in risk behaviors among 18/19 year-old adolescents. In the cross-sectional study parental divorce was significantly associated with cigarette smoking and using doping agents. Conclusion: Parental divorce that occurs when the children of divorced parents are 15/16 year-old or younger is associated with an increase in cigarette smoking and use of doping agents. However, no evidence of significant association is found between experience of late parental divorce and risk behaviors in late adolescence. PMID:25006342

Photo-ionization cross-section of donor-related in (In,Ga)N/GaN core/shell under hydrostatic pressure and electric field effects

NASA Astrophysics Data System (ADS)

El Ghazi, Haddou; John Peter, A.

2017-04-01

Hydrogenic-like donor-impurity related self and induced polarizations, bending energy and photo-ionization cross section in spherical core/shell zinc blende (In,Ga)N/GaN are computed. Based on the variational approach and within effective-mass and one parabolic approximations, the calculations are made under finite potential barrier taking into account of the discontinuity of the effective-mass and the constant dielectric. The photo-ionization cross section is studied according to the photon incident energy considering the effects of hydrostatic pressure, applied electric field, structure's radius, impurity's position and indium composition in the core. It is obtained that the influences mentioned above lead to either blue shifts or redshifts of the resonant peak of the photo-ionization cross section spectrum. The unusual behavior related to the structure radius is discussed which is as a consequence of the finite potential confinement. We have shown that the photo-ionization cross section can be controlled with adjusting the internal and external factors. These properties can be useful for producing some device applications such as quantum dot infrared photodetectors.

Fog Collection on Polyethylene Terephthalate (PET) Fibers: Influence of Cross Section and Surface Structure.

PubMed

Azad, M A K; Krause, Tobias; Danter, Leon; Baars, Albert; Koch, Kerstin; Barthlott, Wilhelm

2017-06-06

Fog-collecting meshes show a great potential in ensuring the availability of a supply of sustainable freshwater in certain arid regions. In most cases, the meshes are made of hydrophilic smooth fibers. Based on the study of plant surfaces, we analyzed the fog collection using various polyethylene terephthalate (PET) fibers with different cross sections and surface structures with the aim of developing optimized biomimetic fog collectors. Water droplet movement and the onset of dripping from fiber samples were compared. Fibers with round, oval, and rectangular cross sections with round edges showed higher fog-collection performance than those with other cross sections. However, other parameters, for example, width, surface structure, wettability, and so forth, also influenced the performance. The directional delivery of the collected fog droplets by wavy/v-shaped microgrooves on the surface of the fibers enhances the formation of a water film and their fog collection. A numerical simulation of the water droplet spreading behavior strongly supports these findings. Therefore, our study suggests the use of fibers with a round cross section, a microgrooved surface, and an optimized width for an efficient fog collection.

Association of Electronic Health Literacy With Health-Promoting Behaviors in Patients With Type 2 Diabetes: A Cross-sectional Study.

PubMed

Kim, Kyoung A; Kim, Yu Jin; Choi, Mona

2018-05-04

It is important to know how well patients with type 2 diabetes understand and use health information available online in relation to health-promoting behaviors. Thus, the purposes of this study were to examine the association among electronic health literacy, perceived benefits, self-efficacy, and health-promoting behaviors in patients with type 2 diabetes, and to identify factors that affect health-promoting behaviors. A cross-sectional survey was conducted in a diabetes center in Seoul, South Korea. It was found that health-promoting behaviors were significantly correlated with electronic health literacy (r = 0.15, P < .05), perceived benefits (r = 0.15, P < .05), and self-efficacy (r = 0.47, P < .01). In the multiple linear regression analysis to identify the factors influencing health-promoting behaviors, electronic health literacy (β = .13, P = .040) and self-efficacy (β = .38, P < .001) were found to be significant factors, even after adjusting for general and disease-related characteristics. Strategies to improve health-promoting behaviors in patients with type 2 diabetes should focus on analyzing levels of electronic health literacy and deepening their understanding of online information accordingly.

Body image flexibility moderates the association between disordered eating cognition and disordered eating behavior in a non-clinical sample of women: a cross-sectional investigation.

PubMed

Moore, Makeda; Masuda, Akihiko; Hill, Mary L; Goodnight, Bradley L

2014-12-01

Body image flexibility, a regulation process of openly and freely experiencing disordered eating thoughts and body dissatisfaction, has been found to be a buffering factor against disordered eating symptomatology. The present cross-sectional study investigates whether body image flexibility accounts for disordered eating behavior above and beyond disordered eating cognition, mindfulness, and psychological inflexibility in a sample of nonclinical women, and whether body image flexibility moderates the associations between these correlates and disordered eating behavior. Participants were 421 women, age 21±5.3 years old on average, who completed a web-based survey that included the self-report measures of interest. Results demonstrate the incremental effects of body image flexibility on disordered eating behavior above and beyond disordered eating cognition, mindfulness, and psychological inflexibility. Women with greater body image flexibility endorse disordered eating behavior less so than those with lower body image flexibility. Body image flexibility moderates the association between disordered eating cognition and disordered eating behavior; for women with greater body image flexibility, disordered eating cognition is not positively associated with disordered eating behavior. Copyright © 2014 Elsevier Ltd. All rights reserved.

Aggressive and Violent Behavior and Emotional Self-Efficacy: Is There a Relationship for Adolescents?

ERIC Educational Resources Information Center

Valois, Robert F.; Zullig, Keith J.; Revels, Asa A.

2017-01-01

Background: In this cross-sectional study we explored relationships between aggressive and violent behaviors and emotional self-efficacy (ESE) in a statewide sample of public high school adolescents in South Carolina (N = 3836). Methods: The US Centers for Disease Control and Prevention Youth Risk Behavior Survey items on aggressive and violent…

Oppositional Behavior and Anxiety in Boys and Girls: A Cross-Sectional Study in Two Community Samples

ERIC Educational Resources Information Center

Mireault, Gina; Rooney, Siri; Kouwenhoven, Kristen; Hannan, Carolyn

2008-01-01

Studies have repeatedly shown that oppositional behavior is linked to anxiety in clinical samples of children. This study explored whether these variables were similarly related in nonclinical samples of elementary and middle school students (N = 302). Despite greater self-reported oppositional behavior among boys in these samples, anxiety…

Investigating Predictors of Pre-Service Science Teachers' Behavioral Intention toward e-Resources for Teaching

ERIC Educational Resources Information Center

Shittu, Ahmed Tajudeen; Kareem, Bamidele Wahab; Obielodan, Omotayo Olabo; Fakomogbon, Michael Ayodele

2017-01-01

This study examined predictors of pre-service science teachers' behavioral intention toward e-resources use for teaching in Nigeria. The study used cross-sectional survey research method and a questionnaire with a set of items that measure technology preparedness, perceived usefulness, perceived ease of use and behavioral intention to gather the…

Correlates of Precoital Behaviors, Intentions, and Sexual Initiation among Thai Adolescents

ERIC Educational Resources Information Center

Atwood, Katharine A.; Zimmerman, Rick; Cupp, Pamela K.; Fongkaew, Warunee; Miller, Brenda A.; Byrnes, Hilary F.; Chamratrithirong, Aphichat; Rhucharoenpornpanich, Orratai; Chaiphet, Nonthathorn; Rosati, Michael J.; Chookhare, Warunee

2012-01-01

This paper examines the risk and protective factors associated with sexual behaviors among Thai youth ages 13-14 (N=420) living in Bangkok, Thailand. Cross-sectional data were collected using a random sample of households methodology. Three outcomes were assessed: (1) intention to engage in sexual intercourse, (2) pre-coital behaviors, and (3)…

Price-Minimizing Behaviors in Response to Increasing Tobacco Price: A Cross-Sectional Study of Students

ERIC Educational Resources Information Center

Rutter, Lucy; Britton, John; Langley, Tessa

2017-01-01

Background: The public health benefits of tobacco taxation are undermined when smokers engage in price-minimizing behaviors other than quitting in response to rising prices. Methods: 314 students at the University of Nottingham, UK, completed an online survey about their smoking behavior and their likely responses to hypothetical tobacco price…

Projecting Sexual and Injecting HIV Risks into Future Outcomes with Agent-Based Modeling

NASA Astrophysics Data System (ADS)

Bobashev, Georgiy V.; Morris, Robert J.; Zule, William A.

Longitudinal studies of health outcomes for HIV could be very costly cumbersome and not representative of the risk population. Conversely, cross-sectional approaches could be representative but rely on the retrospective information to estimate prevalence and incidence. We present an Agent-based Modeling (ABM) approach where we use behavioral data from a cross-sectional representative study and project the behavior into the future so that the risks of acquiring HIV could be studied in a dynamical/temporal sense. We show how the blend of behavior and contact network factors (sexual, injecting) play the role in the risk of future HIV acquisition and time till obtaining HIV. We show which subjects are the most likely persons to get HIV in the next year, and whom they are likely to infect. We examine how different behaviors are related to the increase or decrease of HIV risks and how to estimate the quantifiable risk measures such as survival HIV free.

Analysis of the cross flow in a radial inflow turbine scroll

NASA Technical Reports Server (NTRS)

Hamed, A.; Abdallah, S.; Tabakoff, W.

1977-01-01

Equations of motion were derived, and a computational procedure is presented, for determining the nonviscous flow characteristics in the cross-sectional planes of a curved channel due to continuous mass discharge or mass addition. An analysis was applied to the radial inflow turbine scroll to study the effects of scroll geometry and the through flow velocity profile on the flow behavior. The computed flow velocity component in the scroll cross-sectional plane, together with the through flow velocity profile which can be determined in a separate analysis, provide a complete description of the three dimensional flow in the scroll.

Psychosocial factors and health behavior among Korean adults: a cross-sectional study.

PubMed

Kye, Su Yeon; Park, Keeho

2012-01-01

This study was an attempt to identify associations between health behavior, such as smoking, alcohol consumption, healthy diet, and physical activity, and psychosocial factors. This cross- sectional study was conducted among 1,500 participants aged between 30 and 69 years, selected from a population-based database in October 2009 through multiple-stratified random sampling. Information was collected about the participants' smoking and drinking habits, dietary behavior, level of physical activity, stress, coping strategies, impulsiveness, personality, social support, sense of coherence, self-efficacy, health communication, and sociodemographics. Agreeableness, as a personality trait, was negatively associated with smoking and a healthy diet, while extraversion was positively associated with drinking. The tendency to consume a healthy diet decreased in individuals with perceived higher stress, whereas it increased in individuals who had access to greater social support. Self-efficacy was found to be a strong predictor of all health behaviors. Provider-patient communication and physical environment were important factors in promoting positive healthy behavior, such as consumption of a healthy diet and taking regular exercise. Psychosocial factors influence individuals' smoking and drinking habits, dietary intake, and exercise patterns.

Motivational maturity and helping behavior.

PubMed

Haymes, M; Green, L

1977-12-01

This study was undertaken to examine the independent influences of conative development (the Maslow needs hierarchy) upon behavioral aspects of prosocial orientations. It provides a behavioral demonstration of conative effects in a helping paradigm, among college-age men. A comparison of the conative data across the ages of 15-22 provided a cross-sectional view of conative development itself. Conative maturity was found to be predictive of greater helping among college-age men. Situational demands were demonstrated which tended to mask, but not override, these predispositional influences on helping. The cross-sectional data on conative development point to probable movement to early esteem concerns among high school men who have reached the conative level of love and belonging. On the other hand, the stability across the years of 15-22 of proportion of safety concerns suggests fixation of such concerns in those exhibiting them in high school. Results are discussed in terms of conative growth for development of prosocial orientations.

Correction of the near threshold behavior of electron collisional excitation cross-sections in the plane-wave Born approximation

DOE PAGES

Kilcrease, D. P.; Brookes, S.

2013-08-19

The modeling of NLTE plasmas requires the solution of population rate equations to determine the populations of the various atomic levels relevant to a particular problem. The equations require many cross sections for excitation, de-excitation, ionization and recombination. Additionally, a simple and computational fast way to calculate electron collisional excitation cross-sections for ions is by using the plane-wave Born approximation. This is essentially a high-energy approximation and the cross section suffers from the unphysical problem of going to zero near threshold. Various remedies for this problem have been employed with varying degrees of success. We present a correction procedure formore » the Born cross-sections that employs the Elwert–Sommerfeld factor to correct for the use of plane waves instead of Coulomb waves in an attempt to produce a cross-section similar to that from using the more time consuming Coulomb Born approximation. We compare this new approximation with other, often employed correction procedures. Furthermore, we also look at some further modifications to our Born Elwert procedure and its combination with Y.K. Kim's correction of the Coulomb Born approximation for singly charged ions that more accurately approximate convergent close coupling calculations.« less

Parentification, Stress, and Problem Behavior of Adolescents who have a Parent with Mental Health Problems.

PubMed

Van Loon, Linda M A; Van de Ven, Monique O M; Van Doesum, Karin T M; Hosman, Clemens M H; Witteman, Cilia L M

2017-03-01

When adolescents live with a parent with mental illness, they often partly take over the parental role. Little is known about the consequences of this so-called parentification on the adolescents' internalizing and externalizing problems. This survey study examined this effect cross-sectionally and longitudinally in a sample of 118 adolescents living with a parent suffering from mental health problems. In addition, the study examined a possible indirect effect via perceived stress. Path analyses were used to examine the direct associations between parentification and problem behavior as well as the indirect relations via perceived stress. The results showed that parentification was associated with both internalizing and externalizing problems cross-sectionally, but it predicted only internalizing problems 1 year later. An indirect effect of parentification on adolescent internalizing and externalizing problems via perceived stress was found, albeit only cross-sectionally. These findings imply that parentification can be stressful for adolescents who live with a parent with mental health problems, and that a greater awareness of parentification is needed to prevent adolescents from developing internalizing problems. © 2015 Family Process Institute.

Reasonable Cause for Dismissal of Teachers.

ERIC Educational Resources Information Center

Delon, Floyd G.

The speaker examines a cross-section of the cases illustrating reasonable cause for dismissal of teachers. He considers teacher behavior both in and out of the schools in covering such topics as insubordination, cruelty, personal appearance, curriculum decisions, immoral behavior, political activity, illegal strikes, and criminal conduct. Court…

Alcohol Use, Eating Patterns, and Weight Behaviors in a University Population

ERIC Educational Resources Information Center

Nelson, Melissa C.; Lust, Katherine; Story, Mary; Ehlinger, Ed

2009-01-01

Objective: To explore associations between alcohol, alcohol-related eating, and weight-related health indicators. Methods: Cross-sectional, multivariate regression of weight behaviors, binge drinking, and alcohol-related eating, using self-reported student survey data (n = 3206 undergraduates/graduates). Results: Binge drinking was associated with…

Unified nonlinear analysis for nonhomogeneous anisotropic beams with closed cross sections

NASA Technical Reports Server (NTRS)

Atilgan, Ali R.; Hodges, Dewey H.

1991-01-01

A unified methodology for geometrically nonlinear analysis of nonhomogeneous, anisotropic beams is presented. A 2D cross-sectional analysis and a nonlinear 1D global deformation analysis are derived from the common framework of a 3D, geometrically nonlinear theory of elasticity. The only restrictions are that the strain and local rotation are small compared to unity and that warping displacements are small relative to the cross-sectional dimensions. It is concluded that the warping solutions can be affected by large deformation and that this could alter the incremental stiffnes of the section. It is shown that sectional constants derived from the published, linear analysis can be used in the present nonlinear, 1D analysis governing the global deformation of the beam, which is based on intrinsic equations for nonlinear beam behavior. Excellent correlation is obtained with published experimental results for both isotropic and anisotropic beams undergoing large deflections.

Flow behavior in the Wright Brothers Facility

NASA Technical Reports Server (NTRS)

Genn, S.

1984-01-01

It has become increasingly apparent that a reexamination of the flow characteristics in the low speed Wright Brothers Facility (WBF) is of some importance in view of recent improvements in the precision of the data acquisition system. In particular, the existence of local regions of separation, if any, in back portions of the circuit, and possible related unsteadiness, are of interest. Observations from that initial experiment did indicate some unsteady air flow problems in the cross leg, and thereafter the test region (Section A) was calibrated quantitatively. The intent was to learn something about the effect of upstream intermittent behavior flow on the test section flow, as well as to provide an extensive calibration as a standard for the effects induced by future alteration of the tunnel. Distributions of total pressure coefficients were measured first at one cross-section plane of the test section, namely the model station. Data were obtained for several tunnel speeds. The reduced data yielded an unexpected distribution involving larger pressures along the inside wall.

Influence of cross-sectional design and dimension on mechanical behavior of nickel-titanium instruments under torsion and bending: a numerical analysis.

PubMed

Zhang, En-Wei; Cheung, Gary S P; Zheng, Yu-Feng

2010-08-01

The aim of this study was to examine the influence of the cross-sectional configuration and dimensions (size and taper) on the torsional and bending behavior of nickel-titanium rotary instruments, taking into account the nonlinear mechanical properties of material. Ten cross-sectional configurations, square, triangular, U-type, S-type (large and small), convex-triangle, and 4 proprietary ones (Mani NRT and RT2, Quantec, and Mtwo), were analyzed under torsion or bending by using a 3-dimensional finite element method. The von Mises stresses were correlated with the critical values for various phases of the nickel-titanium material. Different loading conditions led to unequal patterns of stress distribution. Increasing the applied torque or bending angle resulted in a rise in the corresponding stresses in the instrument. Favorable stress distribution without dangerous stress concentration was observed if the material was undergoing superelastic transformation at that applied load. The ultimate strength of the material was not exceeded when the instrument was bent up to a 50-degree curvature. On the other hand, when a torsional moment of greater than 1.0 N*mm was applied, the maximum stresses developed in some designs would exceed the ultimate strength of the material. Little variation in the von Mises stresses was observed for instruments of different nominal sizes and tapers on bending to similar extent. The cross-sectional design has a greater impact than taper or size of the instrument on the stresses developed in the instrument under either torsion or bending. Certain cross-sectional configurations are prone to fracture by excess torsional stresses. Copyright 2010 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

Two-Dimensional Nonlinear Finite Element Analysis of CMC Microstructures

NASA Technical Reports Server (NTRS)

Mital, Subodh K.; Goldberg, Robert K.; Bonacuse, Peter J.

2011-01-01

Detailed two-dimensional finite element analyses of the cross-sections of a model CVI (chemical vapor infiltrated) SiC/SiC (silicon carbide fiber in a silicon carbide matrix) ceramic matrix composites are performed. High resolution images of the cross-section of this composite material are generated using serial sectioning of the test specimens. These images are then used to develop very detailed finite element models of the cross-sections using the public domain software OOF2 (Object Oriented Analysis of Material Microstructures). Examination of these images shows that these microstructures have significant variability and irregularity. How these variabilities manifest themselves in the variability in effective properties as well as the stress distribution, damage initiation and damage progression is the overall objective of this work. Results indicate that even though the macroscopic stress-strain behavior of various sections analyzed is very similar, each section has a very distinct damage pattern when subjected to in-plane tensile loads and this damage pattern seems to follow the unique architectural and microstructural details of the analyzed sections.

Coulomb effects in low-energy nuclear fragmentation

NASA Technical Reports Server (NTRS)

Wilson, John W.; Chun, Sang Y.; Badavi, Francis F.; John, Sarah

1993-01-01

Early versions of the Langley nuclear fragmentation code NUCFRAG (and a publicly released version called HZEFRG1) assumed straight-line trajectories throughout the interaction. As a consequence, NUCFRAG and HZEFRG1 give unrealistic cross sections for large mass removal from the projectile and target at low energies. A correction for the distortion of the trajectory by the nuclear Coulomb fields is used to derive fragmentation cross sections. A simple energy-loss term is applied to estimate the energy downshifts that greatly alter the Coulomb trajectory at low energy. The results, which are far more realistic than prior versions of the code, should provide the data base for future transport calculations. The systematic behavior of charge-removal cross sections compares favorably with results from low-energy experiments.

The use of cross-section warping functions in composite rotor blade analysis

NASA Technical Reports Server (NTRS)

Kosmatka, J. B.

1992-01-01

During the contracted period, our research was concentrated into three areas. The first was the development of an accurate and a computationally efficient method for predicting the cross-section warping functions in an arbitrary cross-section composed of isotropic and/or anisotropic materials. The second area of research was the development of a general higher-order one-dimensional theory for anisotropic beams. The third area of research was the development of an analytical model for assessing the extension-bend-twist coupling behavior of nonhomogeneous anisotropic beams with initial twist. In the remaining six chapters of this report, the three different research areas and associated sub-research areas are covered independently including separate introductions, theoretical developments, numerical results, and references.

Pricing behavior of non-profit agencies. The case of blood products.

PubMed

Jacobs, P; Wilder, R P

1984-04-01

In this study we examine the pricing behavior of a non-profit agency, the American National Red Cross blood service units. Two alternative hypotheses are presented: one in which the agency maximizes profits,, and one in which output is maximized subject to a breakeven constraint. Following a general approach developed by Eckstein and Fromm , pricing equations for separate blood products are applied to cross-sectional data from Red Cross blood centers to determine the impact of demand, cost, competition, and subsidy variables. The impact of these variables, in particular the impact of the fixed subsidy on price, is shown to be consistent with the output-maximizing model.

Sexual Behaviors and Drinking Patterns among Middle School and High School Students in Southeastern North Carolina

ERIC Educational Resources Information Center

Kim-Godwin, Yeoun Soo; Clements, Carrie; Bullers, Susan; Maume, Michael; Demski, Elizabeth

2007-01-01

Considering that current trends in sexual behavior and alcohol use among adolescents pose a significant public health risk, more research is needed in this area. Using a cross-sectional design, this study examined sex and alcohol behaviors among middle school and high school students in southeastern North Carolina. The findings suggested that…

Let's Talk about Sex, Maybe: Interviewers, Respondents, and Sexual Behavior Reporting in Rural South Africa

ERIC Educational Resources Information Center

Houle, Brian; Angotti, Nicole; Clark, Samuel J.; Williams, Jill; Gómez-Olivé, F. Xavier; Menken, Jane; Kabudula, Chodziwadziwa; Klipstein-Grobusch, Kerstin; Tollman, Stephen M.

2016-01-01

Researchers are often skeptical of sexual behavior surveys: Respondents may lie or forget details of their intimate lives, and interviewers may exercise authority in how they capture responses. We use data from a 2010-2011 cross-sectional sexual behavior survey in rural South Africa to explore who says what to whom about their sexual lives.…

Theory of Planned Behavior: Sensitivity and Specificity in Predicting Graduation and Drop-Out among College and University Students?

ERIC Educational Resources Information Center

Fichten, Catherine S.; Amsel, Rhonda; Jorgensen, Mary; Nguyen, Mai Nhu; Budd, Jillian; King, Laura; Jorgensen, Shirley; Asuncion, Jennison

2016-01-01

We examined sensitivity and specificity when using the three theory of planned behavior (TPB) scales (Perceived Behavioral Control, Subjective Norms, Attitude) to predict graduation and drop-out in a longitudinal study of 252 college and university students with disabilities and in a separate cross-sectional study of a random sample of 1380…

Torsional Buckling Tests of a Simulated Solar Array

NASA Technical Reports Server (NTRS)

Thornton, E. A.

1996-01-01

Spacecraft solar arrays are typically large structures supported by long, thin deployable booms. As such, they may be particularly susceptible to abnormal structural behavior induced by mechanical and thermal loading. One example is the Hubble Space Telescope solar arrays which consist of two split tubes fit one inside the other called BiSTEMs. The original solar arrays on the Hubble Space Telescope were found to be severely twisted following deployment and later telemetry data showed the arrays were vibrating during daylight to night and night to daylight transition. The solar array twist however can force the BiSTEM booms to change in cross-section and cause tile solar arrays to react unpredictably to future loading. The solar arrays were redesigned to correct for tile vibration, however, upon redeployment they again twisted. To assess the influence of boom cross-sectional configuration, experiments were conducted on two types of booms, (1)booms with closed cross-sections, and (2) booms with open cross-sections. Both models were subjected to compressive loading and imposed tip deflections. An existing analytical model by Chung and Thornton was used to define the individual load ranges for each model solar array configuration. The load range for the model solar array using closed cross-section booms was 0-120 Newtons and 0-160 Newtons for the model solar array using open cross-section booms. The results indicate the model solar array with closed cross-section booms buckled only in flexure. However, the results of the experiment with open cross-section booms indicate the model solar array buckled only in torsion and with imposed tip deflections the cross section can degrade by rotation of the inner relative to the outer STEM. For tile Hubble Space Telescope solar arrays the results of these experiments indicate the twisting resulted from the initial mechanical loading of the open cross-section booms.

Associations among Text Messaging, Academic Performance, and Sexual Behaviors of Adolescents

ERIC Educational Resources Information Center

Perry, Raymond C. W.; Braun, Rebecca A.; Cantu, Michelle; Dudovitz, Rebecca N.; Sheoran, Bhupendra; Chung, Paul J.

2014-01-01

Background: Text messaging is an increasingly common mode of communication, especially among adolescents, and frequency of texting may be a measure of one's sociability. This study examined how text messaging ("texting") frequency and academic performance are associated with adolescent sexual behaviors. Methods: A cross-sectional survey…

University Students' Subjective Knowledge of Green Computing and Pro-Environmental Behavior

ERIC Educational Resources Information Center

Ahmad, Tunku Badariah Tunku; Nordin, Mohamad Sahari

2014-01-01

This cross-sectional survey examined the structure of university students' subjective knowledge of green computing--hypothesized to be a multidimensional construct with three important dimensions--and its association with pro-environmental behavior (PEB). Using a previously validated green computing questionnaire, data were collected from 842…

Predictors of Low-income, Obese Mothers' Use of Healthful Weight Management Behaviors

ERIC Educational Resources Information Center

Chang, Mei-Wei; Nitzke, Susan; Brown, Roger; Baumann, Linda

2011-01-01

Objective: To examine the influence of personal and environmental factors on healthful weight management behaviors mediated through self-efficacy among low-income obese mothers. Design: Cross-sectional design. Setting: Special Supplemental Nutrition Program for Women, Infants, and Children in Wisconsin. Participants: Two hundred eighty-four obese…

Delinquent Behavior of Dutch Rural Adolescents

ERIC Educational Resources Information Center

Weenink, Don

2011-01-01

This article compares Dutch rural and non-rural adolescents' delinquent behavior and examines two social correlates of rural delinquency: communal social control and traditional rural culture. The analyses are based on cross-sectional data, containing 3,797 participants aged 13-18 (48.7% females). The analyses show that rural adolescents are only…

Screen-Related Sedentary Behaviors: Children's and Parents' Attitudes, Motivations, and Practices

ERIC Educational Resources Information Center

He, Meizi; Piche, Leonard; Beynon, Charlene; Harris, Stewart

2010-01-01

Objective: To investigate school-aged children's and parents' attitudes, social influences, and intentions toward excessive screen-related sedentary behavior (S-RSB). Design: A cross-sectional study using a survey methodology. Setting: Elementary schools in London, Ontario, Canada. Participants: All grades 5 and 6 students, their parents, and…

Protein - Calorie Malnutrition in Children and its Relation to Psychological Development and Behavior

ERIC Educational Resources Information Center

Latham, Michael C.

1974-01-01

Encompassing only human and excluding animal studies, this review surveys the literature on protein-calorie malnutrition and its possible role in retarding psychological, intellectual or behavioral development. Areas reviewed include types of protein-calorie malnutrition, the effects of malnutrition on brain development, cross-sectional and…

Commitment and Consistency Can Promote Student Course Scheduling Effectiveness

ERIC Educational Resources Information Center

Benfield, Jacob A.; Bernstein, Michael J.; Shultz, Norah

2016-01-01

Using social psychological theory, the authors demonstrate in two studies, one cross sectional and one experimental, commitment interventions for timely course scheduling can significantly hasten course-scheduling behavior. Using a simple intervention, the authors were able to alter a regularly occurring student behavior tied to both retention and…

Associations among food insecurity and parental influences of children’s dietary intake

USDA-ARS?s Scientific Manuscript database

The purpose of this study was to assess the overall relationships among food insecurity, parent mediators, and parent behaviors towards children’s dietary behavior in a predominantly Hispanic population. This cross-sectional study was a secondary analysis of baseline data from women with families wh...

Racial and Socioeconomic Disparities in Nutrition Behaviors: Targeted Interventions Needed

ERIC Educational Resources Information Center

Fahlman, Mariane M.; McCaughtry, Nate; Martin, Jeffrey; Shen, Bo

2010-01-01

Objective: To compare dietary knowledge, behaviors and self-efficacy of black middle school students of low socioeconomic status with their white counterparts of higher socioeconomic status. Design: Cross-sectional, school-based survey. Setting: Large metropolitan area in the United States. Participants: Middle school students (1,208 of low…

Collective Definition of Practices Causing Dysfunction in Children.

ERIC Educational Resources Information Center

Niehoff, Michael A.

The development of psychopathology stems, in large measure, from antecedent childhood stresses of maltreatment. This paper creates a list of factors that have been shown to lead to dysfunctional behavior. Such a list could be a valuable resource in the prevention and treatment of psychopathological behavior. A comprehensive cross-section of…

Examining Multiple Parenting Behaviors on Young Children's Dietary Fat Consumption

ERIC Educational Resources Information Center

Eisenberg, Christina M.; Ayala, Guadalupe X.; Crespo, Noe C.; Lopez, Nanette V.; Zive, Michelle Murphy; Corder, Kirsten; Wood, Christine; Elder, John P.

2012-01-01

Objective: To understand the association between parenting and children's dietary fat consumption, this study tested a comprehensive model of parenting that included parent household rules, parent modeling of rules, parent mediated behaviors, and parent support. Design: Cross-sectional. Setting: Baseline data from the "MOVE/me Muevo"…

Photodetachment cross sections of negative ions - The range of validity of the Wigner threshold law

NASA Technical Reports Server (NTRS)

Farley, John W.

1989-01-01

The threshold behavior of the photodetachment cross section of negative ions as a function of photon frequency is usually described by the Wigner law. This paper reports the results of a model calculation using the zero-core-contribution (ZCC) approximation. Theoretical expressions for the leading correction to the Wigner law are developed, giving the range of validity of the Wigner law and the expected accuracy. The results are relevant to extraction of electron affinities from experimental photodetachment data.

Cross-Sectional Relationships of Physical Activity and Sedentary Behavior With Cognitive Function in Older Adults With Probable Mild Cognitive Impairment.

PubMed

Falck, Ryan S; Landry, Glenn J; Best, John R; Davis, Jennifer C; Chiu, Bryan K; Liu-Ambrose, Teresa

2017-10-01

Mild cognitive impairment (MCI) represents a transition between normal cognitive aging and dementia and may represent a critical time frame for promoting cognitive health through behavioral strategies. Current evidence suggests that physical activity (PA) and sedentary behavior are important for cognition. However, it is unclear whether there are differences in PA and sedentary behavior between people with probable MCI and people without MCI or whether the relationships of PA and sedentary behavior with cognitive function differ by MCI status. The aims of this study were to examine differences in PA and sedentary behavior between people with probable MCI and people without MCI and whether associations of PA and sedentary behavior with cognitive function differed by MCI status. This was a cross-sectional study. Physical activity and sedentary behavior in adults dwelling in the community (N = 151; at least 55 years old) were measured using a wrist-worn actigraphy unit. The Montreal Cognitive Assessment was used to categorize participants with probable MCI (scores of <26/30) and participants without MCI (scores of ≥26/30). Cognitive function was indexed using the Alzheimer Disease Assessment Scale-Cognitive-Plus (ADAS-Cog Plus). Physical activity and sedentary behavior were compared based on probable MCI status, and relationships of ADAS-Cog Plus with PA and sedentary behavior were examined by probable MCI status. Participants with probable MCI (n = 82) had lower PA and higher sedentary behavior than participants without MCI (n = 69). Higher PA and lower sedentary behavior were associated with better ADAS-Cog Plus performance in participants without MCI (β = -.022 and β = .012, respectively) but not in participants with probable MCI (β < .001 for both). This study was cross-sectional and therefore could not establish whether conversion to MCI attenuated the relationships of PA and sedentary behavior with cognitive function. The diagnosis of MCI was not confirmed with a physician; therefore, this study could not conclude how many of the participants categorized as having probable MCI would actually have been diagnosed with MCI by a physician. Participants with probable MCI were less active and more sedentary. The relationships of these behaviors with cognitive function differed by MCI status; associations were found only in participants without MCI. © 2017 American Physical Therapy Association

Hybridization and classification of the white pines (Pinus section strobus)

Treesearch

William B. Critchfield

1986-01-01

Many North American and Eurasian white pines retain their ability to hybridize even after long isolation, and about half of all white pine hybrids from controlled pollinations are inter-hemisphere crosses. Within the morphologically homogeneous and otherwise highly crossable core group of white pines, an exception in crossing behavior is Pinus lambertiana...

Trojan horse particle invariance studied with the {sup 6}Li(d,{alpha}){sup 4}He and {sup 7}Li(p,{alpha}){sup 4}He reactions

DOE Office of Scientific and Technical Information (OSTI.GOV)

Pizzone, R. G.; Spitaleri, C.; Lamia, L.

2011-04-15

The Trojan horse nucleus invariance for the binary reaction cross section extracted from the Trojan horse reaction was tested using the quasifree {sup 3}He({sup 6}Li,{alpha}{alpha})H and {sup 3}He({sup 7}Li,{alpha}{alpha}){sup 2}H reactions. The cross sections for the {sup 6}Li(d,{alpha}){sup 4}He and {sup 7}Li(p,{alpha}){sup 4}He binary processes were extracted in the framework of the plane wave approximation. They are compared with direct behaviors as well as with cross sections extracted from previous indirect investigations of the same binary reactions using deuteron as the Trojan horse nucleus instead of {sup 3}He. The very good agreement confirms the applicability of the plane wave approximationmore » which suggests the independence of the binary indirect cross section on the chosen Trojan horse nucleus, at least for the investigated cases.« less

Vanadium fine-structure K-shell electron impact ionization cross sections for fast-electron diagnostic in laser–solid experiments

DOE Office of Scientific and Technical Information (OSTI.GOV)

Palmeri, P., E-mail: patrick.palmeri@umons.ac.be; Quinet, P., E-mail: pascal.quinet@umons.ac.be; IPNAS, Université de Liège, B-4000 Liège

2015-09-15

The K-shell electron impact ionization (EII) cross section, along with the K-shell fluorescence yield, is one of the key atomic parameters for fast-electron diagnostic in laser–solid experiments through the K-shell emission cross section. In addition, in a campaign dedicated to the modeling of the K lines of astrophysical interest (Palmeri et al. (2012)), the K-shell fluorescence yields for the K-vacancy fine-structure atomic levels of all the vanadium isonuclear ions have been calculated. In this study, the K-shell EII cross sections connecting the ground and the metastable levels of the parent vanadium ions to the daughter ions K-vacancy levels considered in Palmerimore » et al. (2012) have been determined. The relativistic distorted-wave (DW) approximation implemented in the FAC atomic code has been used for the incident electron kinetic energies up to 20 times the K-shell threshold energies. Moreover, the resulting DW cross sections have been extrapolated at higher energies using the asymptotic behavior of the modified relativistic binary encounter Bethe model (MRBEB) of Guerra et al. (2012) with the density-effect correction proposed by Davies et al. (2013)« less

Individual and environmental factors related to stage of change in exercise behavior: a cross-sectional study of female Japanese undergraduate students.

PubMed

Yasunaga, Akitomo; Kawano, Yukari; Kamahori, Yumiko; Noguchi, Kyoko

2014-01-01

The purpose of the current study was to examine the association between the level of exercise behavior and individual and environmental factors related to exercise behavior among female Japanese undergraduate students. The participants were 2482 female Japanese undergraduate students. Participants' level of exercise behavior was measured by the stage of change to exercise in the transtheoretical model. Individual and environmental factors related to exercise behavior were assessed using body mass index, self-efficacy, social support, perceived positive and negative aspects of exercise, perceived neighborhood environment, attitude toward physical education lessons in childhood and puberty, and depression. Scores for self-efficacy, social support, positive aspects of exercise, and perceived neighborhood environment were significantly higher among women who were more active compared with those who were inactive. On the other hand, scores for negative aspects of exercise and depression were greater among inactive women compared with those who were insufficiently active and/or active. In addition, past attitude toward exercise in primary school, junior high school, and high school was associated with current level of exercise behavior. This cross-sectional study confirmed that psychosocial and environmental factors were closely associated with level of exercise behavior among female Japanese undergraduate students.

Fitness, fatness, cognition, behavior, and academic achievement among overweight children: Do cross-sectional associations correspond to exercise trial outcomes?

PubMed Central

Davis, Catherine L.; Cooper, Stephanie

2011-01-01

Background This study examined associations of fitness and fatness with cognitive processes, academic achievement, and behavior, independent of demographic factors, at the baseline of an exercise trial. Methods Overweight, sedentary but otherwise healthy 7–11 year olds (N=170) participated in a study of health, cognition and achievement in the Augusta, GA area from 2003–2006. Children underwent evaluations of fatness and fitness, psychological assessments of cognition and academic achievement, and behavior ratings by parents and teachers. Partial correlations examined associations of fitness and fatness with cognitive and achievement scores and behavior ratings, controlling for demographic factors. Results Fitness was associated with better cognition, achievement and behavior, and fatness with worse scores. Specifically, executive function, mathematics and reading achievement, and parent ratings of child behavior were related to fitness and fatness. Teacher ratings were related to fitness. Conclusion These results extend prior studies by providing reliable, standardized measures of cognitive processes, achievement, and behavior in relation to detailed measures of fitness and fatness. However, cross-sectional associations do not necessarily indicate that improving one factor, such as fatness or fitness, will result in improvements in factors that were associated with it. Thus, randomized clinical trials are necessary to determine the effects of interventions. PMID:21281668

Fitness, fatness, cognition, behavior, and academic achievement among overweight children: do cross-sectional associations correspond to exercise trial outcomes?

PubMed

Davis, Catherine L; Cooper, Stephanie

2011-06-01

This study examined associations of fitness and fatness with cognitive processes, academic achievement, and behavior, independent of demographic factors, at the baseline of an exercise trial. Overweight, sedentary but otherwise healthy 7-11 year olds (N=170) participated in a study of health, cognition and achievement in the Augusta, GA area from 2003-2006. Children underwent evaluations of fatness and fitness, psychological assessments of cognition and academic achievement, and behavior ratings by parents and teachers. Partial correlations examined associations of fitness and fatness with cognitive and achievement scores and behavior ratings, controlling for demographic factors. Fitness was associated with better cognition, achievement and behavior, and fatness with worse scores. Specifically, executive function, mathematics and reading achievement, and parent ratings of child behavior were related to fitness and fatness. Teacher ratings were related to fitness. These results extend prior studies by providing reliable, standardized measures of cognitive processes, achievement, and behavior in relation to detailed measures of fitness and fatness. However, cross-sectional associations do not necessarily indicate that improving one factor, such as fatness or fitness, will result in improvements in factors that were associated with it. Thus, randomized clinical trials are necessary to determine the effects of interventions. Copyright © 2011. Published by Elsevier Inc.

Poverty dynamics in Germany: Evidence on the relationship between persistent poverty and health behavior.

PubMed

Aue, Katja; Roosen, Jutta; Jensen, Helen H

2016-03-01

Previous studies have found poverty to be related to lower levels of health due to poor health behavior such as unhealthy eating, smoking or less physical activity. Longer periods of poverty seem to be especially harmful for individual health behavior. Studies have shown that poverty has a dynamic character. Moreover, poverty is increasingly regarded as being a multidimensional construct and one that considers more aspects than income alone. Against this background this paper analyzes the relationship between health behavior and persistent spells of income poverty as well as a combined poverty indicator using data of the German Socio-Economic Panel (2000-2010). Next to cross-sectional logistic regression models we estimate fixed-effects models to analyze the effect of persistent poverty on dietary behavior, tobacco consumption, and physical activity. Cross-sectional results suggest that persistent poverty is related to poor health behavior, particularly regarding tobacco consumption and physical activity. Results also show that multidimensional and dynamic aspects of poverty matter. Complementary panel analyses reveal negative effects for the combined poverty indicator only for dietary behavior in the total sample. However, by analyzing the sample by gender we identify further effects of persistent poverty on health behavior. The analyses show that not only do individuals in poverty but also those in precarious situations show health-damaging behavior more often. Copyright © 2016 Elsevier Ltd. All rights reserved.

Cognitive Development in Children with Brain Damage.

ERIC Educational Resources Information Center

Bortner, Morton

Presented is a report on a cross-sectional and longitudinal study concerned with the course of intellectual development in 210 children (6-12 years old) educationally designated as brain damaged (learning disabled and/or behavior problems) and assigned to special school placement. The report is divided into four sections which focus on…

The Relation of Age, Gender, Ethnicity, and Risk Behaviors to Self-Esteem among Students in Nonmainstream Schools

ERIC Educational Resources Information Center

Connor, Jennifer M.; Poyrazli, Senel; Ferrer-Wreder, Laura; Grahame, Kamini Maraj

2004-01-01

This cross-sectional study investigated self-esteem in relation to age, gender, ethnicity, and risk behaviors among a sample of nonmainstream students. Participants were 149 students in the 6th to 12th grades from two non-mainstream schools (one charter and one alternative school). Self-esteem and youth risk behaviors were determined by using a…

A nonlinear theory for spinning anisotropic beams using restrained warping functions

NASA Technical Reports Server (NTRS)

Ie, C. A.; Kosmatka, J. B.

1993-01-01

A geometrically nonlinear theory is developed for spinning anisotropic beams having arbitrary cross sections. An assumed displacement field is developed using the standard 3D kinematics relations to describe the global beam behavior supplemented with an additional field that represents the local deformation within the cross section and warping out of the cross section plane. It is assumed that the magnitude of this additional field is directly proportional to the local stress resultants. In order to take into account the effects of boundary conditions, a restraining function is introduced. This function plays the role of reducing the amount of free warping deformation throughout the field due to the restraint of the cross section(s) at the end(s) of the beam, e.g., in the case of a cantilever beam. Using a developed ordering scheme, the nonlinear strains are calculated to the third order. The FEM is developed using the weak form variational formulation. Preliminary interesting numerical results have been obtained that indicate the role of the restraining function in the case of a cantilever beam with circular cross section. These results are for the cases of a tip displacement (static) and free vibration studies for both isotropic and anisotropic materials with varied fiber orientations.

An energy harvesting solution based on the post-buckling response of non-prismatic slender beams

NASA Astrophysics Data System (ADS)

Jiao, Pengcheng; Borchani, Wassim; Hasni, Hassene; Alavi, Amir H.; Lajnef, Nizar

2017-04-01

Systems based on post-buckled structural elements have been extensively used in many applications such as actuation, remote sensing and energy harvesting thanks to their efficiency enhancement. The post-buckling snap- through behavior of bilaterally constrained beams has been used to create an efficient energy harvesting mechanism under quasi-static excitations. The conversion mechanism has been used to transform low-rate and low-frequency excitations into high-rate motions. Electric energy can be generated from such high-rate motions using piezoelectric transducers. However, lack of control over the post-buckling behavior severely limits the mechanism's efficiency. This study aims to maximize the levels of the harvestable power by controlling the location of the snapping point along the beam at different buckling transitions. Since the snap-through location cannot be controlled by tuning the geometry properties of a uniform cross-section beam, non-uniform cross sections are examined. An energy-based theoretical model is herein developed to predict the post-buckling response of non-uniform cross-section beams. The total potential energy is minimized under constraints that represent the physical confinement of the beam between the lateral boundaries. Experimentally validated results show that changing the shape and geometry dimensions of non- uniform cross-section beams allows for the accurate control of the snap-through location at different buckling transitions. A 78.59% increase in harvested energy levels is achieved by optimizing the beam's shape.

Investigation of large α production in reactions involving weakly bound 7Li

NASA Astrophysics Data System (ADS)

Pandit, S. K.; Shrivastava, A.; Mahata, K.; Parkar, V. V.; Palit, R.; Keeley, N.; Rout, P. C.; Kumar, A.; Ramachandran, K.; Bhattacharyya, S.; Nanal, V.; Palshetkar, C. S.; Nag, T. N.; Gupta, Shilpi; Biswas, S.; Saha, S.; Sethi, J.; Singh, P.; Chatterjee, A.; Kailas, S.

2017-10-01

The origin of the large α -particle production cross sections in systems involving weakly bound 7Li projectiles has been investigated by measuring the cross sections of all possible fragment-capture as well as complete fusion using the particle-γ coincidence, in-beam, and off-beam γ -ray counting techniques for the 7Li+93Nb system at near Coulomb barrier energies. Almost all of the inclusive α -particle yield has been accounted for. While the t -capture mechanism is found to be dominant (˜70 % ), compound nuclear evaporation and breakup processes contribute ˜15 % each to the inclusive α -particle production in the measured energy range. Systematic behavior of the t capture and inclusive α cross sections for reactions involving 7Li over a wide mass range is also reported.

The Development of Adult Leisure Behaviors: An Exploratory Inquiry.

ERIC Educational Resources Information Center

Ray, Robert O.

Although research has identified leisure as a significant factor of individual well-being in different stages of adult life, there is little insight into how leisure behaviors and attitudes are acquired. A cross-sectional sample of 300 rural adults was interviewed. Leisure attitudes were assessed on a leisure ethic scale, and well-being was…

The Behavioral Effects of Father Absence on Children and Their Mothers.

ERIC Educational Resources Information Center

McCarthy, E. Doyle; And Others

1982-01-01

Investigated effect of father presence or absence in the home in New York City families: welfare AFDC families and lower-middle income families. Results indicated that children of surrogate fathers revealed significantly more behavioral difficulties. Cross-section children and mothers were more adversely affected by father absence than others.…

Exploring the Theory of Planned Behavior to Explain Sugar-Sweetened Beverage Consumption

ERIC Educational Resources Information Center

Zoellner, Jamie; Estabrooks, Paul A.; Davy, Brenda M.; Chen, Yi-Chun; You, Wen

2012-01-01

Objective: To describe sugar-sweetened beverage (SSB) consumption and to establish psychometric properties and utility of a Theory of Planned Behavior (TPB) instrument for SSB consumption. Methods: This cross-sectional survey included 119 southwest Virginia participants. Most of the respondents were female (66%), white (89%), and had at least a…

Exposure to Situations Conducive to Delinquent Behavior: The Effects of Time Use, Income, and Transportation

ERIC Educational Resources Information Center

Anderson, Amy L.; Hughes, Lorine A.

2009-01-01

Multilevel cross-sectional data from the National Longitudinal Study of Adolescent Health were used to test predictions based on Osgood and colleagues' extension of routine activity theory to individual offending. Specifically, the authors examined the associations between delinquent behavior and three variables hypothesized to increase exposure…

Socioeconomic Disparities in Emerging Adult Weight and Weight Behaviors

ERIC Educational Resources Information Center

VanKim, Nicole A.; Laska, Melissa N.

2012-01-01

Objectives: To explore weight, weight behaviors, and tobacco and alcohol use among emerging adults by parental education and financial strain. Methods: Cross-sectional analyses of 2010 survey data from an urban Minnesota public 4-year university and 2-year community college (n=1201). Results: Low parental education was associated with lower…

Predictors of Caregiver Supportive Behaviors towards Reproductive Health Care for Women with Intellectual Disabilities

ERIC Educational Resources Information Center

Lin, Lan-Ping; Lin, Pei-Ying; Chu, Cordia M.; Lin, Jin-Ding

2011-01-01

Although many previous studies have begun to address the reproductive health needs of women with intellectual disabilities; however, the supportive behaviors of caregivers to assist their reproductive health is not well understood. Data from a cross-sectional survey of ""2009 National Survey on Reproductive Health Care Needs and Health…

Dating and Sexual Attitudes in Asian-American Adolescents

ERIC Educational Resources Information Center

Lau, May; Markham, Christine; Lin, Hua; Flores, Glenn; Chacko, Mariam R.

2009-01-01

Dating behaviors and sexual attitudes of Asian-American youth were examined in a cross-sectional, mixed-methods study in the context of adherence to Asian values, measured by the Asian Values Scale (AVS). In all, 31 Asian-American adolescents (age 14-18 years old) from a Houston community center were interviewed regarding dating behaviors and…

Youth Activity Involvement, Neighborhood Adult Support, Individual Decision Making Skills, and Early Adolescent Delinquent Behaviors: Testing a Conceptual Model

ERIC Educational Resources Information Center

Crean, Hugh F.

2012-01-01

This study examines a cross-sectional structural equation model of participation in youth activities, neighborhood adult support, individual decision making skills, and delinquent behavior in urban middle school youths (n = 2611). Results indicate extracurricular activity participation had both direct and indirect associations with delinquent…

Social-Cognitive Influences on Students' Physical Activity Behavior across the First College Year

ERIC Educational Resources Information Center

Barfield, J. P.; Hutchinson, Jasmin

2012-01-01

Background. The purpose of this study was to examine the cross-sectional and longitudinal influence of specific social-cognitive variables on students' physical activity behavior across the first college year. Methods. First-year college students (N = 406) from a regional higher education institution participated. Email solicitation was sent to…

Living in Partner-Violent Families: Developmental Links to Antisocial Behavior and Relationship Violence

ERIC Educational Resources Information Center

Ireland, Timothy O.; Smith, Carolyn A.

2009-01-01

Links between living in a partner-violent home and subsequent aggressive and antisocial behavior are suggested by the "cycle of violence" hypothesis derived from social learning theory. Although there is some empirical support, to date, findings have been generally limited to cross-sectional studies predominantly of young children, or…

Relationship of nurses' intrapersonal characteristics with work performance and caring behaviors: A cross-sectional study.

PubMed

Geyer, Nelouise-Marié; Coetzee, Siedine K; Ellis, Suria M; Uys, Leana R

2018-02-28

This study aimed to describe intrapersonal characteristics (professional values, personality, empathy, and job involvement), work performance as perceived by nurses, and caring behaviors as perceived by patients, and to examine the relationships among these variables. A cross-sectional design was employed. A sample was recruited of 218 nurses and 116 patients in four private hospitals and four public hospitals. Data were collected using self-report measures. Data analysis included descriptive statistics, exploratory and confirmatory factor analyses, hierarchical linear modelling, correlations, and structural equation modeling. Nurses perceived their work performance to be of high quality. Among the intrapersonal characteristics, nurses had high scores for professional values, and moderately high scores for personality, empathy and job involvement. Patients perceived nurses' caring behaviors as moderately high. Professional values of nurses were the only selected intrapersonal characteristic with a statistically significant positive relationship, of practical importance, with work performance as perceived by nurses and with caring behaviors as perceived by patients at ward level. Managers can enhance nurses' work performance and caring behaviors through provision of in-service training that focuses on development of professional values. © 2018 John Wiley & Sons Australia, Ltd.

Intrinsic acoustical cross sections in the multiple scattering by a pair of rigid cylindrical particles in 2D

NASA Astrophysics Data System (ADS)

Mitri, F. G.

2017-08-01

The multiple scattering effects occurring between two scatterers are described based upon the multipole expansion formalism as well as the addition theorem of cylindrical wave functions. An original approach is presented in which an effective incident acoustic field on a particular object, which includes both the primary and re-scattered waves from the other particle is determined first, and then used with the scattered field to derive closed-form analytical expressions for the inherent (i.e. intrinsic) cross-sections based on the far-field scattering. This method does not introduce any approximation in the calculation of the intrinsic cross-sections since the procedure is reduced to the one-body problem. The mathematical expressions for the intrinsic cross-sections are formulated in partial-wave series expansions (PWSEs) in cylindrical coordinates involving the angle of incidence, the addition theorem for the cylindrical wave functions, and the expansion coefficients of the scatterers. Numerical examples illustrate the analysis for two rigid circular cylindrical cross-sections with different radii immersed in a non-viscous fluid. Computations for the dimensionless extrinsic and intrinsic extinction cross-section factors are evaluated with particular emphasis on varying the angle of incidence, the interparticle distance, as well as the sizes of the particles. A symmetric behavior is observed for the dimensionless extrinsic extinction cross-section, while asymmetry arises for the intrinsic extinction cross-section of each particle with respect to the angle of incidence. The present analysis provides a complete analytical and computational method for the prediction of the intrinsic (local) scattering, absorption and extinction cross-sections in the multiple acoustic scatterings of plane progressive waves of arbitrary incidence by a pair of scatterers. The results and computational analyses can be used as a priori information for future applications to guide the direct or inverse characterization of multiple scattering systems in acoustically-engineered metamaterials, cloaking devices, particle dynamics, levitation, manipulation and handling, and other areas.

Autism Symptomatology in Boys with Fragile X Syndrome: A Cross Sectional Developmental Trajectories Comparison with Nonsyndromic Autism Spectrum Disorder

ERIC Educational Resources Information Center

Thurman, Angela John; McDuffie, Andrea; Kover, Sara T.; Hagerman, Randi J.; Abbeduto, Leonard

2015-01-01

Although males with fragile X syndrome (FXS) are frequently described as demonstrating autism symptomatology, there is much debate regarding whether the behavioral symptoms representing the core domains of autism are the result of the same or different underlying neurological/psychological mechanisms. The present study used a cross-sectional…

''Reading'' the photoelectron {beta}-parameter spectrum in a resonance region

DOE Office of Scientific and Technical Information (OSTI.GOV)

Dolmatov, V. K.; Guler, E.; Manson, S. T.

2007-09-15

The behavior of the dipole photoelectron angular distribution parameter {beta}{sub nl}({omega}) in the vicinity of autoionizing resonances is discussed. It is shown that from this behavior, surprisingly, many photoionization parameters that cannot be measured experimentally can be extracted. These are the energy positions and ordering of autoionizing resonance minima in the partial photoionization cross sections {sigma}{sub l+1} and {sigma}{sub l-1}, the energies at which these two cross sections intersect, and signs and magnitudes of the cos({delta}{sub l+1}-{delta}{sub l-1}) ({delta}{sub l{+-}}{sub 1} being the phase shifts of the dipole photoionization amplitudes D{sub l{+-}}{sub 1}, respectively) through the autoionizing resonance energy region.more » Based on this, a deeper interpretation of such effects as the width-narrowing, width-fluctuating, and q-reversal in the {beta}{sub nl} parameter spectrum in the autoionizing resonance energy region is given. As an example, calculated data for partial photoionization cross sections {sigma}{sub 3d{r_reversible}}{sub f} and {sigma}{sub 3d{r_reversible}}{sub p}, and {beta}{sub 3d} parameters for 3d photoelectrons from Cr{sup +} are presented.« less

Severe Behavior Disorders of Children and Youth. Monograph in Behavioral Disorders. Volume 7. Selected Papers Presented at the Annual ASU/TECBD Conference on Severe Behavior Disorders of Children and Youth (7th, Tempe, Arizona, November, 1983).

ERIC Educational Resources Information Center

Rutherford, Robert B., Jr., Ed.; Nelson, C. Michael, Ed.

Twelve author-contributed papers representing a cross-section of resarch, practice, and professional opinion are presented from a conference on severe behavior disorders of children and youth. The keynote paper, "In Search of Excellence in Special Education" by T. Lovitt is followed by these papers: "Autism: Some Commonly Accepted Presumptions"…

Low-energy electron scattering from C{sub 4}H{sub 9}OH isomers

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bettega, M. H. F.; Winstead, C.; McKoy, V.

2010-12-15

We present differential, integral, and momentum-transfer cross sections for elastic scattering of low-energy electrons by three butanol isomers, isobutanol, t-butanol, and 2-butanol. Our results were calculated with the Schwinger multichannel method in the static-exchange plus polarization approximation for collision energies from 1 to 50 eV. The present results are compared with previous calculations and measurements for the remaining C{sub 4}H{sub 9}OH isomer, n-butanol [Khakoo et al., Phys. Rev. A 78, 062714 (2008)]. Distinctive behavior is observed in the differential cross sections at collision energies between 5 and 10 eV. In particular, whereas n-butanol exhibits an f-wave scattering pattern, the othermore » isomers exhibit d-wave behavior. A similar pattern is found in the related alkanes when comparing straight-chain versus branched isomers. We discuss the possible connection of this behavior to shape resonances that influence the scattering.« less

Intention and Willingness in Understanding Ritalin Misuse Among Iranian Medical College Students: A Cross-Sectional Study

PubMed Central

Eslami, Ahmad Ali; Jalilian, Farzad; Ataee, Mari; Alavijeh, Mehdi Mirzaei; Mahboubi, Mohammad; Afsar, Ali; Aghaei, Abbas

2014-01-01

Ritalin misuse can create powerful stimulant effects and serious health risks. The main aim of present study was compared that two cognitive construct (behavioral intention or behavioral willingness) for predicting Ritalin misuse. This cross-sectional study was conducted among 264 Iranian medical college students; participants selected in random sampling, and data were collected by using self-report questionnaire. Data were analyzed by SPSS version 21 at 95% significant level. Our findings showed, the three predictor variables of (1) attitude, (2) subjective norms, and (3) prototype accounted for 29% of the variation in intention and 25% of the variation in willingness to Ritalin misuse. In addition, behavioral intention was a stronger prediction factor compared to willingness for Ritalin misuse, with odds ratio estimate of 1.607 [95% CI: 1.167, 2.213]. There is some support to use the prototype willingness model to design interventions to improve individuals’ beliefs that academic goals are achievable without the misuse of Ritalin. PMID:25363098

Cognitive Bias as a Mediator in the Relation Between Fear-Enhancing Parental Behaviors and Anxiety Symptoms in Children: A Cross-Sectional Study.

PubMed

Fliek, Lorraine; Dibbets, Pauline; Roelofs, Jeffrey; Muris, Peter

2017-02-01

The present cross-sectional study explored the relations between fear-enhancing parenting behaviors (modeling and threat information transmission) and children's cognitive biases and anxiety symptoms. Participants were 258 children aged 7-12 years (132 boys and 126 girls), and their mothers (n = 199) and/or fathers (n = 117). Children and parents completed the Parental Enhancement of Anxious Cognitions questionnaire, which measures parental modeling and threat information transmission, while children also filled in a scale for assessing anxiety symptoms. In addition, children conducted a number of computerized tasks for measuring confirmation and interpretation bias. The data indicated that both biases mediated the relationship between threat information transmission (of both parents) and children's anxiety symptoms. Only interpretation bias significantly mediated the relationship between modeling (of mothers) and anxiety symptoms. These findings give partial support for the hypothesis that cognitive biases play a mediating role in the relation between fear-enhancing parental behaviors and children's anxiety symptoms.

The Behavioral Economics and Neuroeconomics of Alcohol Use Disorders

PubMed Central

MacKillop, James

2016-01-01

Background Behavioral economics and neuroeconomics bring together perspectives and methods from psychology, economics, and cognitive neuroscience to understand decision making and choice behavior. Extending an operant behavioral theoretical framework, these perspectives have increasingly been applied to understanding alcohol use disorders (AUDs) and this review surveys the theory, methods, and findings from this approach. The focus is on three key behavioral economic concepts: delay discounting (i.e., preferences for smaller immediate rewards relative to larger delayed rewards), alcohol demand (i.e., alcohol reinforcing value), and proportionate alcohol-related reinforcement (i.e., relative amount of psychosocial reinforcement associated with alcohol use). Findings Delay discounting has been linked to AUDs in both cross-sectional and longitudinal studies, and has been investigated cross-sectionally using neuroimaging. Alcohol demand and proportionate alcohol-related reinforcement have both been robustly associated with drinking and alcohol misuse cross-sectionally, but not over time. Both have also been found to predict treatment response to brief interventions. Alcohol demand has also been used to enhance the measurement of acute motivation for alcohol in laboratory studies. Interventions that focus on reducing the value of alcohol by increasing alternative reinforcement and response cost have been found to be efficacious, albeit in relatively small numbers of randomized controlled trials (RCTs). Mediators and moderators of response to these interventions have not been extensively investigated. Future Directions The application of behavioral economics and neuroeconomics to AUDs has given rise to an extensive body of empirical work, although significant gaps in knowledge remain. In particular, there is a need for more longitudinal investigations to clarify the etiological roles of these behavioral economic processes, especially alcohol demand and proportionate alcohol reinforcement. Additional RCTs are needed to extend and generalize the findings from reinforcement-based interventions and to investigate mediators and moderators of treatment success for optimization. Applying neuroeconomics to AUDs remains at an early stage and has been primarily descriptive to date, but has high potential for important translational insights in the future. The same is true for using these behavioral economic indicators to understand genetic influences on AUDs. PMID:26993151

The Relation between Popularity and Aggressive, Destructive, and Norm-Breaking Behaviors: Moderating Effects of Athletic Abilities, Physical Attractiveness, and Prosociality

ERIC Educational Resources Information Center

Dijkstra, Jan Kornelis; Lindenberg, Siegwart; Verhulst, Frank C.; Ormel, Johan; Veenstra, Rene

2009-01-01

The aim of this study was to examine the relations between popularity and different types of aggressive, destructive, and norm-breaking behaviors in a large cross-sectional sample of adolescents (N=3,312, M age=13.60). We were interested in the extent to which the relations of these behaviors with popularity were moderated by positive features…

Aerodynamics of the flying snake Chrysopelea paradisi: how a bluff body cross-sectional shape contributes to gliding performance.

PubMed

Holden, Daniel; Socha, John J; Cardwell, Nicholas D; Vlachos, Pavlos P

2014-02-01

A prominent feature of gliding flight in snakes of the genus Chrysopelea is the unique cross-sectional shape of the body, which acts as the lifting surface in the absence of wings. When gliding, the flying snake Chrysopelea paradisi morphs its circular cross-section into a triangular shape by splaying its ribs and flattening its body in the dorsoventral axis, forming a geometry with fore-aft symmetry and a thick profile. Here, we aimed to understand the aerodynamic properties of the snake's cross-sectional shape to determine its contribution to gliding at low Reynolds numbers. We used a straight physical model in a water tunnel to isolate the effects of 2D shape, analogously to studying the profile of an airfoil of a more typical flyer. Force measurements and time-resolved (TR) digital particle image velocimetry (DPIV) were used to determine lift and drag coefficients, wake dynamics and vortex-shedding characteristics of the shape across a behaviorally relevant range of Reynolds numbers and angles of attack. The snake's cross-sectional shape produced a maximum lift coefficient of 1.9 and maximum lift-to-drag ratio of 2.7, maintained increases in lift up to 35 deg, and exhibited two distinctly different vortex-shedding modes. Within the measured Reynolds number regime (Re=3000-15,000), this geometry generated significantly larger maximum lift coefficients than many other shapes including bluff bodies, thick airfoils, symmetric airfoils and circular arc airfoils. In addition, the snake's shape exhibited a gentle stall region that maintained relatively high lift production even up to the highest angle of attack tested (60 deg). Overall, the cross-sectional geometry of the flying snake demonstrated robust aerodynamic behavior by maintaining significant lift production and near-maximum lift-to-drag ratios over a wide range of parameters. These aerodynamic characteristics help to explain how the snake can glide at steep angles and over a wide range of angles of attack, but more complex models that account for 3D effects and the dynamic movements of aerial undulation are required to fully understand the gliding performance of flying snakes.

Injecting drug users and their health seeking behavior: a cross-sectional study in dhaka, bangladesh.

PubMed

Shariful Islam, Sheikh Mohammed; Biswas, Tuhin; Bhuiyan, Faiz Ahmed; Islam, Md Serajul; Rahman, Mohammad Mizanur; Nessa, Hurun

2015-01-01

Introduction and Aim. Injecting drug users (IDUs) are amongst the most vulnerable people to acquisition of HIV/AIDS. This study aims to collect information on IDUs and their health seeking behavior in Bangladesh. Design and Methods. A cross-sectional study was conducted among 120 IDUs attending a drug rehabilitation center in Dhaka, Bangladesh. Data were collected on sociodemographics, drug use, health seeking behavior, knowledge of injecting drugs, and sexual behavior. Results. The mean ± SD and median (IQR) age of the participants were 32.5 ± 21.3 and 33 (27-38) years, respectively, with only 9.2% females. Injection buprenorphine was the drug of choice for 40% of participants, and 58% of the participants first started drug use with smoking cannabis. 73.3% of participants shared needles sometimes and 57.5% were willing to use the needle exchange programs. 60% of the participants had no knowledge about the diseases spread by injection. Condom use during the last intercourse with regular partners was 11.7% and with any partners 15.8%. Conclusion. IDUs in Bangladesh are a high-risk group for HIV/AIDS due to lack of knowledge and risky behaviors. Education and interventions specifically aimed at IDUs are needed, because traditional education may not reach IDUs or influence their behavior.

Injecting Drug Users and Their Health Seeking Behavior: A Cross-Sectional Study in Dhaka, Bangladesh

PubMed Central

Biswas, Tuhin; Bhuiyan, Faiz Ahmed; Islam, Md. Serajul; Rahman, Mohammad Mizanur; Nessa, Hurun

2015-01-01

Introduction and Aim. Injecting drug users (IDUs) are amongst the most vulnerable people to acquisition of HIV/AIDS. This study aims to collect information on IDUs and their health seeking behavior in Bangladesh. Design and Methods. A cross-sectional study was conducted among 120 IDUs attending a drug rehabilitation center in Dhaka, Bangladesh. Data were collected on sociodemographics, drug use, health seeking behavior, knowledge of injecting drugs, and sexual behavior. Results. The mean ± SD and median (IQR) age of the participants were 32.5 ± 21.3 and 33 (27–38) years, respectively, with only 9.2% females. Injection buprenorphine was the drug of choice for 40% of participants, and 58% of the participants first started drug use with smoking cannabis. 73.3% of participants shared needles sometimes and 57.5% were willing to use the needle exchange programs. 60% of the participants had no knowledge about the diseases spread by injection. Condom use during the last intercourse with regular partners was 11.7% and with any partners 15.8%. Conclusion. IDUs in Bangladesh are a high-risk group for HIV/AIDS due to lack of knowledge and risky behaviors. Education and interventions specifically aimed at IDUs are needed, because traditional education may not reach IDUs or influence their behavior. PMID:25692067

Disentangling Heterogeneity of Childhood Disruptive Behavior Problems Into Dimensions and Subgroups.

PubMed

Bolhuis, Koen; Lubke, Gitta H; van der Ende, Jan; Bartels, Meike; van Beijsterveldt, Catharina E M; Lichtenstein, Paul; Larsson, Henrik; Jaddoe, Vincent W V; Kushner, Steven A; Verhulst, Frank C; Boomsma, Dorret I; Tiemeier, Henning

2017-08-01

Irritable and oppositional behaviors are increasingly considered as distinct dimensions of oppositional defiant disorder. However, few studies have explored this multidimensionality across the broader spectrum of disruptive behavior problems (DBPs). This study examined the presence of dimensions and distinct subgroups of childhood DBPs, and the cross-sectional and longitudinal associations between these dimensions. Using factor mixture models (FMMs), the presence of dimensions and subgroups of DBPs was assessed in the Generation R Study at ages 6 (n = 6,209) and 10 (n = 4,724) years. Replications were performed in two population-based cohorts (Netherlands Twin Registry, n = 4,402, and Swedish Twin Study of Child and Adolescent Development, n = 1,089) and a clinical sample (n = 1,933). We used cross-lagged modeling in the Generation R Study to assess cross-sectional and longitudinal associations between dimensions. DBPs were assessed using mother-reported responses to the Child Behavior Checklist. Empirically obtained dimensions of DBPs were oppositional behavior (age 6 years), disobedient behavior, rule-breaking behavior (age 10 years), physical aggression, and irritability (both ages). FMMs suggested that one-class solutions had the best model fit for all dimensions in all three population-based cohorts. Similar results were obtained in the clinical sample. All three dimensions, including irritability, predicted subsequent physical aggression (range, 0.08-0.16). This study showed that childhood DBPs should be regarded as a multidimensional phenotype rather than comprising distinct subgroups. Incorporating multidimensionality will improve diagnostic accuracy and refine treatment. Future studies need to address the biological validity of the DBP dimensions observed in this study; herein lies an important opportunity for neuroimaging and genetic measures. Copyright © 2017 American Academy of Child and Adolescent Psychiatry. Published by Elsevier Inc. All rights reserved.

Calculation of the Effective Cross Sections of the Reaction X(n,p)Y with Neutrons in the Energy Range 2-5 Mev; CALCULO DE SECCIONES EFICACES X(n,p)Y CON NEUTRONES DE ENERGIAS ENTRE 2-5 Mev

DOE Office of Scientific and Technical Information (OSTI.GOV)

Rapaport, J.; Trier, A.

1960-05-01

Parallel with experimental work to measure the ic neutrons between 2 and 3.6 Mev, it was necessary to estimate the theoretical behavior of these cross sections. The statistical theory of Blatt and Weisskopf was used in the calculation. The theoretical results obtained for squarewell and diffuse-well development are compared with the experimental results. (J.S.R.)

Inband radar cross section of phased arrays with parallel feeds

NASA Astrophysics Data System (ADS)

Flokas, Vassilios

1994-06-01

Approximate formulas for the inband radar cross section of arrays with parallel feeds are presented. To obtain the formulas, multiple reflections are neglected, and devices of the same type are assumed to have identical electrical performance. The approximate results were compared to the results obtained using a scattering matrix formulation. Both methods were in agreement in predicting RCS lobe positions, levels, and behavior with scanning. The advantages of the approximate method are its computational efficiency and its flexibility in handling an arbitrary number of coupler levels.

Modeling of the Magnetization Behavior of Realistic Self-Organized InAs/GaAs Quantum Craters as Observed with Cross-Sectional STM

NASA Astrophysics Data System (ADS)

Fomin, V. M.; Gladilin, V. N.; Devreese, J. T.; Offermans, P.; Koenraad, P. M.; Wolter, J. H.; García, J. M.; Granados, D.

2005-06-01

Recently, using cross-sectional scanning-tunneling microscopy (X-STM), it was shown that self-organized ring-like InAs quantum dots are much smaller in diameter than it is expected from atomic force microscopy measurements and, moreover, that they possess a depression rather than an opening in the central region. For those quantum craters, we analyze the possibility to reveal the electronic properties (like the Aharonov-Bohm oscillations) peculiar to doubly connected geometry of quantum rings.

Numerical Modeling of Mechanical Behavior for Buried Steel Pipelines Crossing Subsidence Strata

PubMed Central

Han, C. J.

2015-01-01

This paper addresses the mechanical behavior of buried steel pipeline crossing subsidence strata. The investigation is based on numerical simulation of the nonlinear response of the pipeline-soil system through finite element method, considering large strain and displacement, inelastic material behavior of buried pipeline and the surrounding soil, as well as contact and friction on the pipeline-soil interface. Effects of key parameters on the mechanical behavior of buried pipeline were investigated, such as strata subsidence, diameter-thickness ratio, buried depth, internal pressure, friction coefficient and soil properties. The results show that the maximum strain appears on the outer transition subsidence section of the pipeline, and its cross section is concave shaped. With the increasing of strata subsidence and diameter-thickness ratio, the out of roundness, longitudinal strain and equivalent plastic strain increase gradually. With the buried depth increasing, the deflection, out of roundness and strain of the pipeline decrease. Internal pressure and friction coefficient have little effect on the deflection of buried pipeline. Out of roundness is reduced and the strain is increased gradually with the increasing of internal pressure. The physical properties of soil have a great influence on the mechanical properties of buried pipeline. The results from the present study can be used for the development of optimization design and preventive maintenance for buried steel pipelines. PMID:26103460

Health-Related Coping Behaviors and Mental Health in Military Personnel.

PubMed

Morgan, Jessica Kelley; Hourani, Laurel; Tueller, Stephen

2017-03-01

Our previous research has highlighted the important link between coping behaviors and mental health symptoms in military personnel. This study seeks to extend these findings by examining each coping behavior and mental health issue individually. This study has four specific aims: (1) test cross-sectional relationships between coping and mental health at baseline and follow-up, (2) examine stability of each variable over time, (3) determine the predictive nature of baseline mental health and coping on subsequent mental health and coping, (4) assess the magnitude of each effect to evaluate the differential predictive value of coping behaviors and mental health symptoms. A convenience sample of U.S. Army platoons of the 82nd Airborne was surveyed. We used a two-wave, cross-lagged autoregression design with structural equation modeling to disentangle elements of temporality and to examine the predictive value of mental health status vis-à-vis coping behaviors and vice versa. Separate analyses were performed with each coping strategy and each set of mental health symptoms. This design allowed for the analysis of two synchronous associations (i.e., cross-sectional correlations between the coping strategy and mental health symptoms at each time point), two autoregressive effects (i.e., baseline mental health predicting mental health at follow-up and baseline coping predicting coping at follow-up), and two cross-lagged effects (i.e., baseline coping strategy predicting mental health at follow-up and baseline mental health predicting follow-up coping). Results of descriptive statistics revealed that the most frequently reported coping behavior was thinking of a plan to solve the problem, followed by talking to a friend, engaging in a hobby, and exercising or playing sports. The least often endorsed coping behaviors were smoking marijuana or using illicit drugs and thinking about hurting or killing oneself, followed by having a drink or lighting up a cigarette. We verified many cross-sectional relationships between coping behaviors and mental health symptoms. Specifically, talking to a friend, exercising or playing sports, engaging in a hobby, and thinking of a plan were associated with fewer anxiety, perceived stress, and depression symptoms, whereas smoking a cigarette, having a drink, and thinking about hurting or killing oneself were associated with more anxiety, perceived stress, and depressive symptoms. Marijuana and illicit drug use was also associated with higher depressive symptoms. Saying a prayer was not significantly related to mental health. Only four cross-lagged effects were significant. Those who reported more depressive symptoms at Time 1 reported talking to friends and family less and exercising or playing sports less as coping behaviors at Time 2. Baseline perceived stress predicted less likelihood of engaging in a hobby at follow-up, whereas exercising or playing sports as a coping behavior at baseline predicted lower perceived stress at follow-up. This study expands the evidence for the associations between coping behaviors and psychological health or distress to specific mental health symptoms, particularly in military service members, and provides comparisons of magnitude of each association. Clinically, this knowledge is critical to more efficiently target behaviors with the greatest associations to mental health in military personnel. Reprint & Copyright © 2017 Association of Military Surgeons of the U.S.

Sex Differences in Childhood Sexual Abuse and Suicide-Related Behaviors

ERIC Educational Resources Information Center

Rhodes, Anne E.; Boyle, Michael H.; Tonmyr, Lil; Wekerle, Christine; Goodman, Deborah; Leslie, Bruce; Mironova, Polina; Bethell, Jennifer; Manion, Ian

2011-01-01

Child sexual abuse and suicide-related behaviors are associated, but it remains unclear if the strength of this association differs in boys and girls. In a systematic review of this association in children and youth, we identified 16 relevant studies, all cross-sectional surveys of students. The association is stronger in boys specific to suicide…

Stress Coping Behaviors of Faith-Based College Non-Student Athletes vs. Student-Athletes

ERIC Educational Resources Information Center

Jennings, R. A.; Henderson, C. S.; Erla, M. A.; Abraham, S.; Gillum, D.

2018-01-01

Problem and Purpose: A review of the literature revealed that college non-student athletes and student-athletes experience stress during their college years but do not always have the appropriate coping behaviors to manage the stress. The purpose of this descriptive, cross-sectional, non-experimental study was to determine the stress coping…

Dietary Supplement Use, Perceptions, and Associated Lifestyle Behaviors in Undergraduate College Students, Student-Athletes, and ROTC Cadets

ERIC Educational Resources Information Center

Valentine, Arthur A.; Schumacher, Julie Raeder; Murphy, Jan; Ma, Yoon Jin

2018-01-01

Objective: To identify the prevalence of dietary supplement (DS) use, perceptions of DS efficacy, and lifestyle behaviors of DS users and non-users. Participants: Undergraduate students, student-athletes, and ROTC cadets at a Midwestern University between September 2014 and January 2015. Methods: A cross-sectional online survey was administered.…

Does Concern Motivate Behavior Change?: Exploring the Relationship between Physical Activity and Body Mass Index among Low-Income Housing Residents

ERIC Educational Resources Information Center

Tamers, Sara L.; Allen, Jennifer; Yang, May; Stoddard, Anne; Harley, Amy; Sorensen, Glorian

2014-01-01

Objective: To explore relationships between concerns and physical activity and body mass index (BMI) among a racially/ethnically diverse low-income population. Method: A cross-sectional survey documented behavioral risks among racially/ethnically diverse low-income residents in the Boston area (2005-2009). Multivariable logistic regressions were…

Gender-Related Quality of Parent-Child Interactions and Early Adolescent Problem Behaviors: Exploratory Study with Midwestern Samples

ERIC Educational Resources Information Center

Spoth, Richard; Neppl, Tricia; Goldberg-Lillehoj, Catherine; Jung, Tony; Ramisetty-Mikler, Suhasini

2006-01-01

This article reports two exploratory studies testing a model guided by a social interactional perspective, positing an inverse relation between the quality of parent-child interactions and adolescent problem behaviors. It addresses mixed findings in the literature related to gender differences. Study 1 uses cross-sectional survey data from…

An Evaluation of the Validity and Reliability of a Food Behavior Checklist Modified for Children

ERIC Educational Resources Information Center

Branscum, Paul; Sharma, Manoj; Kaye, Gail; Succop, Paul

2010-01-01

Objective: The objective of this study was to report the construct validity and internal consistency reliability of the Food Behavior Checklist modified for children (FBC-MC), with low-income, Youth Expanded Food and Nutrition Education Program (EFNEP)-eligible children. Methods: Using a cross-sectional research design, construct validity was…

Weight Perception and Dieting Behavior among Korean Adolescents

ERIC Educational Resources Information Center

Lee, Gyuyoung; Ha, Yeongmi; Vann, Julie Jacobson; Choi, Eunsook

2009-01-01

This study examines relationships among weight status, weight perceptions, and dieting behaviors in South Korean adolescents. As perceptions of an ideal body for teens in Korea have changed over time, it is important for school nurses to understand these relationships to help students achieve health. A cross-sectional survey of 3,191 8th and 2,252…

Correlates of Body Mass Index, Weight Goals, and Weight-Management Practices among Adolescents

ERIC Educational Resources Information Center

Paxton, Raheem J.; Valois, Robert F.; Drane, J. Wanzer

2004-01-01

The study examined associations among physical activity, cigarette smoking, body mass index, perceptions of body weight, weight-management goals, and weight-management behaviors of public high school adolescents. The CDC Youth Risk Behavior Survey provided a cross-sectional sample (n = 3,089) of public high school students in South Carolina.…

Are Body Dissatisfaction, Eating Disturbance, and Body Mass Index Predictors of Suicidal Behavior in Adolescents? A Longitudinal Study

ERIC Educational Resources Information Center

Crow, Scott; Eisenberg, Marla E.; Story, Mary; Neumark-Sztainer, Dianne

2008-01-01

Disordered eating, body dissatisfaction, and obesity have been associated cross sectionally with suicidal behavior in adolescents. To determine the extent to which these variables predicted suicidal ideation and attempts, the authors examined these relationships in a longitudinal design. The study population included 2,516 older adolescents and…

Factors Associated with Motorcycle Risk Behavior in Thai University Students, Khon Kaen

ERIC Educational Resources Information Center

Puratmaja, Yudha; Handayani, Lina; Sunardi, Kartika Setyaningsih

2017-01-01

The aim of this research was to assess motorcycle risk behavior (MRB) among Thai students in Khon Kaen University. The research used a cross sectional study. Fifty Thai students recruited using purposive sample technique and the chi-square test was used to analyze relationship between characteristic associated with MRB. The most common MRB were…

Rates of Physical Activity among Appalachian Adolescents in Ohio

ERIC Educational Resources Information Center

Hortz, Brian; Stevens, Emily; Holden, Becky; Petosa, R. Lingyak

2009-01-01

Purpose: The purpose of this study was to describe the physical activity behavior of high school students living in the Appalachian region of Ohio. Methods: A cross-sectional sample of 1,024 subjects from 11 schools in Appalachian Ohio was drawn. Previously validated instruments were used to measure physical activity behavior over 7 days.…

Physical activity and nicotine dependence among a national sample of young U.S. adults who smoke daily: evaluation of cross-sectional and longitudinal associations to determine which behavior drives this relationship.

PubMed

Loprinzi, Paul D; Kane, Christy J; Mahoney, Sara; Walker, Jerome F

2015-02-01

The association between nicotine dependence and physical activity (PA) is relatively unknown. No study has concurrently examined the cross-sectional and longitudinal associations between PA and nicotine dependence, which was the primary purpose of this study. A secondary purpose was to examine how well nicotine dependence and PA behavior track over a two-year period. Data from the 2003-2005 National Youth Smoking Cessation Survey (NYSCS) were used, with young adults (18-24 yrs; n=1168) being followed over a two-year period. Physical activity was assessed using a questionnaire and nicotine dependence was assessed using the modified Fagerstrom Test for Nicotine Dependence scale. This study identified three notable findings: 1) baseline PA and nicotine dependence demonstrated a bidirectional, cross-sectional association (e.g., β=-0.23; 95% CI: -0.44 to -0.02; p=0.02); 2) when examined longitudinally, nicotine dependence influenced PA (OR=0.90; 95% CI: 0.82-0.99; p=0.04), but there was no evidence of the reverse pathway (i.e., PA influencing 2-year follow-up smoking status [OR=0.95; 95% CI: 0.66-1.39; p=0.82) or nicotine dependence (β=0.05; 95% CI: -0.14 to 0.24, p=0.61]); and 3) both PA (OR=3.52, 95% CI: 2.68-4.69; p<0.001) and nicotine dependence (β=0.52; 95% CI: 0.46-0.58, p<0.001) tracked relatively well over a two-year period during early adulthood. These findings suggest that both behaviors (physical activity and nicotine dependence) track over time, but nicotine dependence appears to be driving the cross-sectional relationship between nicotine dependence and physical activity, as opposed to the reverse pathway. Copyright © 2014 Elsevier Inc. All rights reserved.

Using Multitheory Model of Health Behavior Change to Predict Adequate Sleep Behavior.

PubMed

Knowlden, Adam P; Sharma, Manoj; Nahar, Vinayak K

The purpose of this article was to use the multitheory model of health behavior change in predicting adequate sleep behavior in college students. A valid and reliable survey was administered in a cross-sectional design (n = 151). For initiation of adequate sleep behavior, the construct of behavioral confidence (P < .001) was found to be significant and accounted for 24.4% of the variance. For sustenance of adequate sleep behavior, changes in social environment (P < .02), emotional transformation (P < .001), and practice for change (P < .001) were significant and accounted for 34.2% of the variance.

Impulsive Behavior and Associated Clinical Variables in Parkinson's Disease

PubMed Central

Abosch, Aviva; Gupte, Akshay; Eberly, Lynn E.; Tuite, Paul J.; Nance, Martha; Grant, Jon E.

2011-01-01

Parkinson's disease (PD) is a degenerative brain disorder accompanied by the loss of dopaminergic neurons and the presence of motor and non-motor symptoms. We performed a cross-sectional, questionnaire-based analysis of impulsive behavior in our PD clinic population to assess prevalence and associated characteristics. We found a higher prevalence of impulsive behavior (29.7%) than previously reported, and found multiple, concurrent impulsive behaviors in 26% of subjects reporting impulsive behavior. Our findings contribute to the growing awareness of impulsive behavior in PD, and support the need for longitudinal studies to assess changes in impulsive behaviors in Parkinson's patients. PMID:21300194

Adsorption on Nanopores of Different Cross Sections Made by Electron Beam Nanolithography.

PubMed

Bruschi, Lorenzo; Mistura, Giampaolo; Prasetyo, Luisa; Do, Duong D; Dipalo, Michele; De Angelis, Francesco

2018-01-09

Adsorption on nanoporous matrices is characterized by a pronounced hysteresis loop in the adsorption isotherm, when the substrate is loaded and unloaded with adsorbate, the origin of which is a matter of immense debate in the literature. In this work, we report a study of argon adsorption at 85 K on nonconnecting nanopores with one end closed to the surrounding where the effects of different pore cross sections fabricated by electron beam lithography (EBL) are investigated. A polymethylmethacrylate (PMMA) resist is deposited on the electrodes of a sensitive quartz crystal microbalance without degradation of the resonance quality factor or the long-term and short-term stabilities of the device even at cryogenic temperatures. Four different pores' cross sections: circular, square, rectangular, and triangular, are produced from EBL, and the isotherms for these pore shapes exhibit pronounced hysteresis loops whose adsorption and desorption branches are nearly vertical and have almost the same slopes. No difference is observed in the hysteresis loops of the isotherms for the pores with triangular and square cross sections, whereas the hysteresis loop for the pore with circular cross sections is much narrower, suggesting that they are more regular than the other pores. All of these observations suggest that the hysteresis behavior resulted mainly from microscopic geometric irregularities present in these porous matrices.

Sports Participation and Alcohol Use: Associations With Sports-Related Identities and Well-Being.

PubMed

Zhou, Jin; Heim, Derek; Levy, Andrew

2016-01-01

Studies indicate that those participating in sports are a high-risk population for hazardous alcohol use. Previous research identifies psychosocial drivers underpinning this link between sports participation and risky drinking behavior; however, the evidence is restricted to cross-sectional prevalence studies. Theoretical evaluations suggest that psychologically constructed identities are a defining factor for behaviors in this context. Therefore, the present study sought to examine longitudinally the relationships among sports-related identities, well-being, and alcohol behaviors in those participating in sports. Respondents completed self-report questionnaires on their alcohol consumption, drinking motives, athlete identity (personal identity), sports group identification (social identity), and general well-being. A sample of 475 participants (male = 55.6%; mean age = 20.2 years) provided data at Time 1 for cross-sectional analysis. Longitudinal associations were conducted with 92 participants (male = 42.4%; mean age = 20.8 years) who provided follow-up data (Time 1 and 6 months later). Cross-sectional results revealed an association between social identity and alcohol consumption, which was fully mediated by positive reinforcement drinking motives. Correlation analysis found a significant positive relationship between Time 1 alcohol consumption and social identity 6 months later. Furthermore, social identity was positively associated with consumption, whereas athlete identity was negatively associated therewith. Finally, well-being was positively associated only with sports group identification over time. Our findings suggest that sport-related drinking may be an avenue for building group identification, and this identification is linked to well-being.

Electron Collision Processes with Carbon Dioxide: Resolving Long-Standing Paradoxes

NASA Astrophysics Data System (ADS)

Rescigno, T. N.; Haxton, D. J.; McCurdy, C. W.

2012-10-01

The principal features of low-energy electron-CO2 collisions have been known and studied for over forty years. The scattering is characterized by a rapid rise in the total cross section below 1 eV, anomalous threshold behavior for excitation of symmetric stretch and bending vibrational modes, resonant vibrational excitation near 4 eV with weak ``boomerang'' structure in the excitation cross sections and dissociative electron attachment cross sections leading to CO + O^- which peak near 4 eV and 8 eV and have angular distributions which show large deviations from axial recoil. The nuclear dynamics associated with all these features is intrinsically polyatomic in nature and cannot be described with one-dimensional models. The present study provides a consistent description of all these phenomena and resolves a number long-standing paradoxes and misconceptions found in the extant literature.

Associations between poor health and school-related behavior problems at the child and family levels: a cross-sectional study of migrant children and adolescents in southwest urban China.

PubMed

Zhang, Jing-Jing; Li, Ning-Xiu; Liu, Chao-Jie

2010-06-01

Due to urbanization in China, the numbers of migrant children and adolescents in urban environments have increased. Previous studies have indicated that children and adolescents are more likely to suffer from health problems and poor school achievement. The present study identified associations between poor health and school-related behavior problems (ie, learning attitudes and learning disabilities [LL], antisocial behavior and risk behavior [AR], and social adaptation and role function [SR]) at the child and family levels. A cross-sectional design was used. Seven hundred and eighty-one participants were recruited in inclusive settings. Correlational analysis was conducted to assess the associations between demographic variables and the primary study variables. Logistic regression analysis was used to determine which study factors were the strongest predictors of general health problems. School-aged migrants who had poorer health tended to be more likely to suffer from school-related behavior problems. Poor health was also found to hinder scholastic achievement in migrant children and adolescents through a higher prevalence of school-related behavior problems, including negative learning attitudes and learning disabilities, antisocial behavior and risk behavior, and social maladjustment. Health risk factors included inappropriate parental education methods, fewer classmates, and less social support. Health and individual risk factors should be explored further to determine their causal role in migrant children and adolescents with school-related behavior problems. These results have implications for future school health education for these students.

Bullying Behavior and Psychosocial Health - A Cross-sectional Study among School Students of Pyuthan Municipality.

PubMed

Mishra, Durga Khadka; Thapa, Tulsi Ram; Marahatta, Sujan Babu; Mahotra, Anita

2018-03-13

Bullying remains as pervasive phenomenon affecting children worldwide. Bullying in school has long been a matter of concern as wide range of adjustment problems including poor mental health and violent behavior in school are associated with it. The present study examined the prevalence of bullying behavior (bullies, victims and bully-victims) and their association with depression and psychosomatic symptoms. A cross-sectional descriptive study was carried out among 8th, 9th and 10th grade students of Pyuthan Municipality, Mid-Western Nepal. A total of 405 students responded to the structured self-administered questionnaire. Data was collected from randomly selected public and private schools. Descriptive and inferential statistics were used for analysis. The result of this study showed higher prevalence of bully (55.8%) among students of Relatively Advantaged Janajati whereas victims (64.86%) belonged to Disadvantaged Janajatis. Students who bully were found more in grade 8 and 10 whilst the students of grade 9 were more victims. Bullying behavior prevailed more in private schools than in public schools. The overall prevalence of bullying behavior (either bully or victim) is 69.14%. The finding bolsters an association between bullying behavior and depression, psychosomatic symptoms and school type. Higher prevalence of bullying behavior suggested by this study portends the alarming consequences among school students. Bullying needs to be addressed fleetly. Effective interventions that reduce bullying practice in school is essential.

Depression remission, receipt of problem-solving therapy, and self-care behavior frequency among low-income, predominantly Hispanic diabetes patients.

PubMed

Oh, Hyunsung; Ell, Kathleen

2016-01-01

This study explored whether depression remission and problem-solving therapy (PST) receipt are associated with more frequent self-care behaviors via cross-sectional and prospective analyses. We analyzed data from a randomized clinical trial (N=387) that tested collaborative depression care among predominantly Hispanic patients with diabetes in safety-net clinics. Data at 12-month follow-up, measured with the Patient Health Questionnaire-9 and Hopkins Symptom Checklist-20, were used to define depression remission. PST was provided by a bilingual social worker. Multivariate regression analysis was used to examine associations between predictors and frequency change of each self-care behavior (healthy diet, exercise, self-blood glucose monitoring, and foot care between baseline and 12-month (N=281), 18-month (N=249), and 24-month (N=235) follow-up surveys. Inconsistent relationships were observed depending on the instrument to identify depression remission, type of self-care behaviors, and time when self-care behavior was measured. Significant associations were more likely to be observed in cross-sectional analyses. PST receipt was not associated with self-care behaviors. Depression remission or the receipt of PST may not be a reliable antecedent for more frequent self-care behaviors among this group. A few recommendations for studies were offered to enhance existing depression care for diabetes patients. Copyright © 2016 Elsevier Inc. All rights reserved.

Home feeding environment and picky eating behavior in preschool-aged children: A prospective analysis.

PubMed

Cole, Natasha Chong; Musaad, Salma M; Lee, Soo-Yeun; Donovan, Sharon M

2018-06-07

Picky eating is prevalent in young children and is associated with poor dietary quality and nutrient deficiencies. Identifying predictors of picky eating could inform the development of anticipatory feeding guidance for parents and caregivers of young children. This study identified the association between factors of the home feeding environment with picky eating behavior in a cohort of preschool-aged children. Parents of preschool-aged children (n = 497) completed questionnaires including measures of the home feeding environment (i.e., television during mealtime, family mealtime routines, and feeding practices) and child picky eating behavior. The questionnaire was repeated one year later, in which 326 parent-child dyads participated. Logistic regression was used to determine the cross-sectional and prospective associations between home feeding environment measures and child picky eating behavior outcomes. Child control over feeding and watching television during mealtime were associated with higher odds of picky eating behavior in both cross-sectional and prospective analyses. A higher sense of positive climate during family meals and mealtime ritualization was associated with lower odds of picky eating behavior one year later. The home feeding environment plays a role in the development of young children's picky eating behavior. Avoiding the television and maintaining parent control of food choices during mealtimes could lead to improvements in children's food preferences and dietary intake. Copyright © 2018. Published by Elsevier Ltd.

Low-temperature collisional quenching of NO A{sup 2}Σ{sup +}(v′ = 0) by NO(X{sup 2}Π) and O{sub 2} between 34 and 109 K

DOE Office of Scientific and Technical Information (OSTI.GOV)

Sánchez-González, R.; Eveland, W. D.; West, N. A.

2014-08-21

We present measurements of collisional fluorescence quenching cross sections of NO(A{sup 2}Σ{sup +}, v′ = 0) by NO(X{sup 2}Π) and O{sub 2} between 34 and 109 K using a pulsed converging-diverging nozzle gas expansion, extending the temperature range of previous measurements. The thermally averaged fluorescence quenching cross sections for both species show a monotonic increase as temperature decreases in this temperature range, consistent with earlier observations. These new measurements, however, allow discrimination between predictions obtained by extrapolating fits of previous data using different functional forms that show discrepancies exceeding 120% for NO and 160% for O{sub 2} at 34 K.more » The measured self-quenching cross section is 52.9 Å{sup 2} near 112 K and increases to 64.1 Å{sup 2} at 35 K, whereas the O{sub 2} fluorescence quenching cross section is 42.9 Å{sup 2} at 109 K and increases to 58.3 Å{sup 2} at 34 K. Global fits of the quenching cross section temperature dependence show that, when including our current measurements, the low temperature behavior of the quenching cross sections for NO and O{sub 2} is better described by a parameterization that accounts for the long-range interactions leading to the collisional deactivation via an inverse power law model.« less

Modeling Drinking Behavior Progression in Youth: a Non-identified Probability Discrete Event System Using Cross-sectional Data

PubMed Central

Hu, Xingdi; Chen, Xinguang; Cook, Robert L.; Chen, Ding-Geng; Okafor, Chukwuemeka

2016-01-01

Background The probabilistic discrete event systems (PDES) method provides a promising approach to study dynamics of underage drinking using cross-sectional data. However, the utility of this approach is often limited because the constructed PDES model is often non-identifiable. The purpose of the current study is to attempt a new method to solve the model. Methods A PDES-based model of alcohol use behavior was developed with four progression stages (never-drinkers [ND], light/moderate-drinker [LMD], heavy-drinker [HD], and ex-drinker [XD]) linked with 13 possible transition paths. We tested the proposed model with data for participants aged 12–21 from the 2012 National Survey on Drug Use and Health (NSDUH). The Moore-Penrose (M-P) generalized inverse matrix method was applied to solve the proposed model. Results Annual transitional probabilities by age groups for the 13 drinking progression pathways were successfully estimated with the M-P generalized inverse matrix approach. Result from our analysis indicates an inverse “J” shape curve characterizing pattern of experimental use of alcohol from adolescence to young adulthood. We also observed a dramatic increase for the initiation of LMD and HD after age 18 and a sharp decline in quitting light and heavy drinking. Conclusion Our findings are consistent with the developmental perspective regarding the dynamics of underage drinking, demonstrating the utility of the M-P method in obtaining a unique solution for the partially-observed PDES drinking behavior model. The M-P approach we tested in this study will facilitate the use of the PDES approach to examine many health behaviors with the widely available cross-sectional data. PMID:26511344

Does work-to-family conflict really matter for health? Cross-sectional, prospective cohort and fixed-effects analyses.

PubMed

Oshio, Takashi; Inoue, Akiomi; Tsutsumi, Akizumi

2017-02-01

It is well known that work-to-family conflict (WFC) is negatively associated with employees' health outcomes, including mental health and health behavior. However, the associations may be overstated because of insufficient control for unobserved individual attributes. To address this possibility, we compared the associations between WFC and health observed from a cross-sectional, prospective cohort and from fixed-effects regression models. We analyzed data from a Japanese occupational cohort survey of 15,102 observations from 7551 individuals (5947 men and 1604 women), which were collected in two waves with a one-year interval. We constructed a binary variable of high WFC and considered psychological distress measured using the Kessler 6 (K6) score, job and life dissatisfaction, and five types of health behavior (current smoking, problem drinking, leisure-time physical inactivity, sickness absence, and refraining from medical care). Results showed that for men, a high WFC increased the probability of reporting psychological distress (K6 score ≥ 5); this increased by 12.4% in a fixed-effects model. The association was substantially limited, as compared to the increase of 30.9% and 23.2% observed in cross-sectional and prospective cohort models, respectively; however, the association remained significant. Similar patterns were observed for job and life dissatisfaction. In contrast, the associations of WFC with all five types of health behavior were non-significant after controlling for fixed effects. We obtained generally similar results for women and found no substantial gender difference in the fixed-effects models. We concluded that the associations of WFC with employees' mental health and subjective well-being were robust, whereas the association between WFC and health behavior was generally limited. Copyright © 2016 Elsevier Ltd. All rights reserved.

Measurements of the $$\\Upsilon$$(1S), $$\\Upsilon$$(2S), and $$\\Upsilon$$(3S) differential cross sections in pp collisions at $$\\sqrt{s} =$$ 7 TeV

DOE PAGES

Khachatryan, Vardan

2015-07-22

Differential cross sections as a function of transverse momentum p T are presented for the production of Υ(nS) (n = 1, 2, 3) states decaying into a pair of muons. Thus, data corresponding to an integrated luminosity of 4.9 fb -1 in pp collisions at √s = 7 TeV were collected with the CMS detector at the LHC. The analysis selects events with dimuon rapidity |y| < 1.2 and dimuon transverse momentum in the range 10 < p T < 100 GeV. The measurements show a transition from an exponential to a power-law behavior at p T ≈ 20 GeVmore » for the three Υ states. Above that transition, the Υ(3S) spectrum is significantly harder than that of the Υ(1S). The ratios of the Υ(3S) and Υ(2S) differential cross sections to theγ Υ(1S) cross section show a rise as p T increases at low p T, then become flatter at higher p T.« less

Nuclear medium effects in muonic neutrino interactions with energies from 0.2 to 1.5 GeV

NASA Astrophysics Data System (ADS)

Vargas, D.; Samana, A. R.; Velasco, F. G.; Hoyos, O. R.; Guzmán, F.; Bernal-Castillo, J. L.; Andrade-II, E.; Perez, R.; Deppman, A.; Barbero, C. A.; Mariano, A. E.

2017-11-01

Nuclear reactions induced by muon neutrinos with energies from 0.2 to 1.5 GeV in the Monte Carlo calculation framework in the intranuclear cascade model are studied. This study was done by comparing the available experimental data and theoretical values of total cross section, and the energy distribution of emitted lepton energy in the reaction muon neutrino nucleus, using the targets 12C, 16O, 27Al, 40Ar, 56Fe, and 208Pb. A phenomenological model of primary neutrino-nucleon interaction gives good agreement between our theoretical inclusive neutrino nucleus cross section and the available experimental data. Some interesting results on the behavior of the cross section as function of 1 p -1 n and higher contributions are also sketched. The previous results on the fraction of fake events in available experiments in 12C were expanded for the set of studied nuclei. With the increase of mass targets, the nuclear effects in the cross sections were observed and the importance of taking into account fake events in the reactions was noted.

Clinical Significance of Cerebrovascular Biomarkers and White Matter Tract Integrity in Alzheimer Disease: Clinical correlations With Neurobehavioral Data in Cross-Sectional and After 18 Months Follow-ups.

PubMed

Wu, Ming-Kung; Lu, Yan-Ting; Huang, Chi-Wei; Lin, Pin-Hsuan; Chen, Nai-Ching; Lui, Chun-Chung; Chang, Wen-Neng; Lee, Chen-Chang; Chang, Ya-Ting; Chen, Sz-Fan; Chang, Chiung-Chih

2015-07-01

Cerebrovascular risk factors and white matter (WM) damage lead to worse cognitive performance in Alzheimer dementia (AD). This study investigated WM microstructure using diffusion tensor imaging in patients with mild to moderate AD and investigated specific fiber tract involvement with respect to predefined cerebrovascular risk factors and neurobehavioral data prediction cross-sectionally and after 18 months. To identify the primary pathoanatomic relationships of risk biomarkers to fiber tract integrity, we predefined 11 major association tracts and calculated tract specific fractional anisotropy (FA) values. Eighty-five patients with AD underwent neurobehavioral assessments including the minimental state examination (MMSE) and 12-item neuropsychiatric inventory twice with a 1.5-year interval to represent major outcome factors. In the cross-sectional data, total cholesterol, low-density lipoprotein, vitamin B12, and homocysteine levels correlated variably with WM FA values. After entering the biomarkers and WM FA into a regression model to predict neurobehavioral outcomes, only fiber tract FA or homocysteine level predicted the MMSE score, and fiber tract FA or age predicted the neuropsychiatric inventory total scores and subdomains of apathy, disinhibition, and aberrant motor behavior. In the follow-up neurobehavioral data, the mean global FA value predicted the MMSE and aberrant motor behavior subdomain, while age predicted the anxiety and elation subdomains. Cerebrovascular risk biomarkers may modify WM microstructural organization, while the association with fiber integrity showed greater clinical significance to the prediction of neurobehavioral outcomes both cross-sectionally and longitudinally.

Objectively Measured Sedentary Behavior, Obesity, and Psychological Well-Being: A Cross-Sectional Study of Japanese Schoolchildren.

PubMed

Ishii, Kaori; Shibata, Ai; Adachi, Minoru; Mano, Yoshiyuki; Oka, Koichiro

2017-04-01

Sedentary behaviors (SB) are associated with health indicators; however, there are currently very few studies that have examined these associations, especially in conjunction with psychological factors, in children. The current study examined the independent relationship between objectively assessed SB, and indicators of obesity and psychological well-being, among Japanese children. A total of 967 elementary-school children completed a cross-sectional survey. SB was measured with accelerometers for 7 consecutive days. Psychological well-being data (eg, anxiety and behavior problems) were collected via a self-report questionnaire. To determine the relationship of SB with degree of obesity and psychological well-being, linear regression analyses were conducted to relate the indicators of obesity and psychological well-being on SB, adjusted by gender, grade, percentage of moderate-to-vigorous physical activity per day, duration spent wearing the accelerometer, and degree of obesity. SB was significantly related to behavioral/emotional problems (β = .280, P = .010, R 2 = .015). There was a statistically significant relationship between SB and anxiety (β = .206, P = .059, R 2 = .007). No significant association with degree of obesity was found. Excess SB relates higher levels of behavioral/emotional problems and anxiety. These results can inspire the development of interventions that promote well-being and enhance psychological health, by focusing on SB in Japanese children.

Development of Search Behavior Through Visual Representation in Infancy. RIEEC Research Bulletin RRB-11.

ERIC Educational Resources Information Center

Shimada, Shoko; And Others

The purpose of this study was to cross-sectionally and longitudinally examine the developmental process of search behavior in infancy. Subjects were 23 Japanese normal infants (11 males and 12 females) who were individually tested once a month from the age of six to 13 months in laboratory settings. Small toys and three white opaque cubic boxes…

Differences in Students' Smoking-Related Knowledge, Attitudes, and Behaviors among Public, Factory, and Private Secondary Schools in Guangzhou, China

ERIC Educational Resources Information Center

Wen, Xiaozhong; Chen, Weiqing; Qian, Zhengmin; Muscat, Joshua E.; Lu, Ciyong; Ling, Wenhua

2008-01-01

Background: The prevalence of smoking among Chinese adolescents has dramatically increased in recent years. The purpose of this study was to examine the differences in smoking-related knowledge, attitudes, and behaviors among Chinese students in 3 types of secondary schools. Methods: This cross-sectional study was conducted among 3957 students of…

A Cross-Sectional Behavioral Genetic Analysis of Task Persistence in the Transition to Middle Childhood

ERIC Educational Resources Information Center

Deater-Deckard, Kirby; Petrill, Stephen A.; Thompson, Lee A.; DeThorne, Laura S.

2005-01-01

Task persistence, measured by a composite score of independent teacher, tester and observer reports, was examined using behavioral genetic analysis. Participants included 92 monozygotic and 137 same-sex dizygotic twin pairs in Kindergarten or 1st grade (4.3 to 7.9 years old). Task persistence was widely distributed, higher among older children,…

Adolescents' Smoking Behaviors, Beliefs on the Risks of Smoking, and Exposure to ETS in Juarez, Mexico

ERIC Educational Resources Information Center

Bird, Yelena; Moraros, John; Olsen, Larry K.; Coronado, Gloria D.; Thompson, Beti

2006-01-01

Objective: To assess the smoking behaviors, beliefs about the risks of smoking, and exposure to ETS among adolescents in Juarez, Mexico. Methods: A cross-sectional study was conducted with sixth-grade students (N=506), aged 11-13 years old, attending 6 randomly selected schools. Schools were classified by school setting and SES. Results:…

Methamphetamine Use and Sexual Risk Behavior among High School Students in Cape Town, South Africa

ERIC Educational Resources Information Center

Pluddemann, Andreas; Flisher, Alan J.; McKetin, Rebecca; Parry, Charles D.; Lombard, Carl J.

2012-01-01

Objective: To investigate whether methamphetamine use is associated with sexual risk behavior among adolescents. Method: A cross-sectional survey of 1,561 male and female high school students in Cape Town (mean age 14.9 years) was conducted using items from the Problem Oriented Screening Instrument for Teenagers (POSIT) HIV Risk Scale. Results:…

Energy Balance--Related Behavior and Anthropometric Measures among Adolescents across Three Educational Levels: A Cross-Sectional Study in Dutch Schools

ERIC Educational Resources Information Center

Ridder, Monica A. M.; Koning, Maaike; Visscher, Tommy L. S.; Hirasing, Remy A.; Seidell, Jacob C.; Renders, Carry M.

2018-01-01

Energy balance-related behavior on schooldays and beliefs about school-based interventions may differ between students in different educational levels, sexes, and BMI (body mass index) categories. In Zwolle (the Netherlands), 1,084 adolescents (13-15 years) at 9 secondary schools completed a questionnaire. Overweight prevalence (boys 18.1%, girls…

Sensation Seeking and Risk-Taking Propensity as Mediators in the Relationship between Childhood Abuse and HIV-Related Risk Behavior

ERIC Educational Resources Information Center

Bornovalova, Marina A.; Gwadz, Marya A.; Kahler, Christopher; Aklin, W. M.; Lejuez, C. W.

2008-01-01

Objectives: Although a wealth of literature suggests that childhood physical, emotional, and sexual abuse are related to later-life HIV-related risk behaviors, few studies have explored disinhibition (e.g., impulsivity, risk-taking propensity, and sensation-seeking) as a risk factor in this relationship. Method: This cross-sectional study examined…

Principal Influence on Teacher Behavior: Substitutes for Leadership. Final Report.

ERIC Educational Resources Information Center

Pitner, Nancy J.; Charter, W. W., Jr.

This document reports on a review of the leadership literature, a cross-sectional correlation study, and a series of in-depth teacher interviews, all of which were parts of an effort to better understand the conditions under which a principal can lead. The correlation study makes use of S. Kerr's theory that the effect of the leader's behavior on…

The Relation between Students' Justice Experiences and Their School Refusal Behavior

ERIC Educational Resources Information Center

Donat, Matthias; Gallschütz, Christoph; Dalbert, Claudia

2018-01-01

In a cross-sectional questionnaire study with N = 1658 German students, aged between 12 and 17 years (M = 14.1, SD = 0.5), we investigated the relation of students' personal belief in a just world (BJW) to their school absenteeism and functions of school refusal behavior. In accordance with recent studies which identified negative relations…

Sunscreen Use among US High School Students, 1999-2003

ERIC Educational Resources Information Center

Jones, Sherry Everett; Saraiya, Mona

2006-01-01

The purpose of this paper was to examine sunscreen use among US high school students. Data were derived from the Centers for Disease Control and Prevention's 1999, 2001, and 2003 national Youth Risk Behavior Surveys, which are cross-sectional surveys of health risk behaviors among high school students in the United States. In 2003, 1 in 7 (14.2%)…

Irregular Breakfast Eating and Associated Health Behaviors: A Pilot Study among College Students

ERIC Educational Resources Information Center

Thiagarajah, Krisha; Torabi, Mohammad R.

2009-01-01

The purpose of this study was to examine prevalence of eating breakfast and associated health compromising behaviors. This study utilized a cross-sectional survey methodology. A purposive cluster sampling technique was utilized to collect data from a representative sample of college students in a Midwestern university in the U.S. A total of 1,257…

HIV Risk Behavior among Amphetamine Injectors at U.S. Syringe Exchange Programs

ERIC Educational Resources Information Center

Braine, Naomi; Des Jarlais, Don C.; Goldblatt, Cullen; Zadoretzky, Cathy; Turner, Charles

2005-01-01

The goal of this study was to compare HIV risk behaviors of amphetamine and non-amphetamine injectors at syringe exchange programs (SEP) in the United States and to identify factors associated with injection risk. This analysis is based on data from a random cross-section of participants at 13 SEPs in different parts of the country. All interviews…

Relationship between Eating Behaviors and Physical Activity among Primary and Secondary School Students: Results of a Cross-Sectional Study

ERIC Educational Resources Information Center

Morin, Pascale; Turcotte, Sylvain; Perreault, Gino

2013-01-01

Background: With a view toward developing concerted efforts in fostering healthy eating habits and a physically active lifestyle among young people, a study was carried out to explore associations between eating behavior and physical activity (PA). Methods: In the school district, questionnaires were completed at home by parents of primary school…

Diet- and Body Size-related Attitudes and Behaviors Associated with Vitamin Supplement Use in a Representative Sample of Fourth-grade Students in Texas

USDA-ARS?s Scientific Manuscript database

The objective of this research was to examine diet- and body size-related attitudes and behaviors associated with supplement use in a representative sample of fourth-grade students in Texas. The research design consisted of cross-sectional data from the School Physical Activity and Nutrition study, ...

Perception, Knowledge and Behaviors Related to Typhoon: A Cross Sectional Study among Rural Residents in Zhejiang, China

PubMed Central

Zhang, Wenchao; Wang, Wei; Lin, Junfen; Zhang, Ying; Shang, Xiaopeng; Wang, Xin; Huang, Meilin; Liu, Shike; Ma, Wei

2017-01-01

(1) The objective of this study was to assess the risk perceptions, attitudes, knowledge, and behaviors related to typhoon among rural residents in Zhejiang province of China. A cross-sectional study was conducted among rural residents in Zhejiang province, China. Information was collected from 659 participants using a structured questionnaire. Univariate analysis and multivariable analysis were used to analyze the data. Participants were most concerned about property damage, followed by their health and life. Television, short message service (SMS), relatives and friends were the most common information sources. Most people had not been educated with disaster prevention measures. The complementary log–log (CLL) model showed that understanding typhoon warning signal, preparation time, risk perception of health damage and life threat, and fears of typhoon were independent predictors of adoption of coping behaviors. We found that: 1. Residents’ risk perception of health and life threat caused by typhoon is inadequate; 2. There is a gap between residents’ cognition or knowledge and behavior in rural areas; 3. The government should further make strategies to develop educational activities, in order to eliminate the gap and improve the ability of preparing for typhoon among rural residents. PMID:28481262

The HIV/AIDS epidemic in Grenada: A cross-sectional approach used to measure response variation regarding sexual behavior and health depending on the method of data collection.

PubMed

Chaudhry, Muhammad Reza; Husain, Faisal; Armstrong, Elan G; Ferguson, James A

2018-06-01

The objective of this study was to determine the association between high-risk sexual behavior in relation to HIV transmission and prevalence among different groups of people in Grenada. In addition, this study intends to increase the involvement and improved services by Grenadian chapter of the Caribbean HIV/AIDS Partnership (GrenCHAP).A cross-sectional study was conducted over a 2-month period in Grenada, West Indies, to measure the responsive nature of different populations to an inquiry about HIV and sexual behavior. The 2 methods used to collect the data were online (via social media) and through an in-person interaction with local NGO GrenCHAP personnel. Survey responses were recorded via SurveyMonkey ending on April 11, 2014.The findings of the study were that there was an increased degree of frankness and demographic diversity in participants who responded online as opposed to in-person.People who responded online were more likely to engage in high-risk sexual behavior. GrenCHAP has the opportunity to contribute in the collection of invaluable data concerning HIV and other STIs because of its NGO status and anonymity.

Perception, Knowledge and Behaviors Related to Typhoon: A Cross Sectional Study among Rural Residents in Zhejiang, China.

PubMed

Zhang, Wenchao; Wang, Wei; Lin, Junfen; Zhang, Ying; Shang, Xiaopeng; Wang, Xin; Huang, Meilin; Liu, Shike; Ma, Wei

2017-05-06

(1) The objective of this study was to assess the risk perceptions, attitudes, knowledge, and behaviors related to typhoon among rural residents in Zhejiang province of China. A cross-sectional study was conducted among rural residents in Zhejiang province, China. Information was collected from 659 participants using a structured questionnaire. Univariate analysis and multivariable analysis were used to analyze the data. Participants were most concerned about property damage, followed by their health and life. Television, short message service (SMS), relatives and friends were the most common information sources. Most people had not been educated with disaster prevention measures. The complementary log-log (CLL) model showed that understanding typhoon warning signal, preparation time, risk perception of health damage and life threat, and fears of typhoon were independent predictors of adoption of coping behaviors. We found that: 1. Residents' risk perception of health and life threat caused by typhoon is inadequate; 2. There is a gap between residents' cognition or knowledge and behavior in rural areas; 3. The government should further make strategies to develop educational activities, in order to eliminate the gap and improve the ability of preparing for typhoon among rural residents.

Partner aggression and problem drinking across the lifespan: how much do they decline?

PubMed

O'Leary, K Daniel; Woodin, Erica M

2005-11-01

Cross-sectional analyses from nationally-representative samples demonstrate significant age-related trends in partner aggression and problem drinking. Both behaviors are most prevalent in the early to mid-twenties and increasingly less common thereafter. Aggregate associations based on percentage of individuals displaying the behavior in each age range are dramatically stronger than those found when correlating individuals' ages and behavior. Multilevel modeling demonstrates that group-level effects do not mask associations found at the level of the individual for either problem drinking or partner aggression. An analysis of recent abstracts from psychology journals showed that issues of aggregate and individual data are rarely if ever discussed, and even well-known statistics books in psychology rarely discuss such issues. The interpretation of aggregate data will become increasing important as psychologists themselves, and in collaboration with epidemiologists and sociologists, have access to large data sets that allow for data aggregation. Both aggregate and individual analyses are valid, although they provide answers to different questions. Individual analyses are necessary for predicting individual behavior; aggregate analyses are useful in policy planning for large scale prevention and intervention. Strengths and limitations of cross-sectional community samples and aggregate data are also discussed.

Personal health behaviors and role-modeling attitudes of physical therapists and physical therapist students: a cross-sectional study.

PubMed

Black, Beth; Marcoux, Beth C; Stiller, Christine; Qu, Xianggui; Gellish, Ronald

2012-11-01

Physical therapists have been encouraged to engage in health promotion practice. Health professionals who engage in healthy behaviors themselves are more apt to recommend those behaviors, and patients are more motivated to change their behaviors when their health care provider is a credible role model. The purpose of this study was to describe the health behaviors and role-modeling attitudes of physical therapists and physical therapist students. This study was a descriptive cross-sectional survey. A national sample of 405 physical therapists and 329 physical therapist students participated in the survey. Participants' attitudes toward role modeling and behaviors related to physical activity, fruit and vegetable consumption, abstention from smoking, and maintenance of a healthy weight were measured. Wilcoxon rank sum tests were used to examine differences in attitudes and behaviors between physical therapists and physical therapist students. A majority of the participants reported that they engage in regular physical activity (80.8%), eat fruits and vegetables (60.3%), do not smoke (99.4%), and maintain a healthy weight (78.7%). Although there were no differences in behaviors, physical therapist students were more likely to believe that role modeling is a powerful teaching tool, physical therapist professionals should "practice what they preach," physical activity is a desirable behavior, and physical therapist professionals should be role models for nonsmoking and maintaining a healthy weight. Limitations of this study include the potential for response bias and social desirability bias. Physical therapists and physical therapist students engage in health-promoting behaviors at similarly high rates but differ in role-modeling attitudes.

Subjective Age in Early Adolescence: Relationships with Chronological Age, Pubertal Timing, Desired Age, and Problem Behaviors

ERIC Educational Resources Information Center

Hubley, Anita M.; Arim, Rubab G.

2012-01-01

Subjective age generally refers to the age that one feels. In a cross-sectional questionnaire study of 245 adolescents ages 10-14 years, we examined (a) whether, and when, a cross-over in subjective age occurs, (b) differences in subjective age among pubertal timing groups, (c) correlations between subjective age and each of desired age and five…

Higher acid-chlorite reactivity of cell corner middle lamella lignin in black spruce

Treesearch

Umesh P. Agarwal

2007-01-01

To determine if there was a delignification behavior difference between secondary wall (S2) and middle lamella (cell corner or CC) lignin, black spruce cross-sections were acid-chlorite delignified and the tissue was evaluated in-situ by Raman imaging. Lignin concentration in S2 and CC was determined in numerous latewood cell areas in the two hour delignified cross...

Investigation of the leading and subleading high-energy behavior of hadron-hadron total cross sections using a best-fit analysis of hadronic scattering data

NASA Astrophysics Data System (ADS)

Giordano, M.; Meggiolaro, E.; Silva, P. V. R. G.

2017-08-01

In the present investigation we study the leading and subleading high-energy behavior of hadron-hadron total cross sections using a best-fit analysis of hadronic scattering data. The parametrization used for the hadron-hadron total cross sections at high energy is inspired by recent results obtained by Giordano and Meggiolaro [J. High Energy Phys. 03 (2014) 002, 10.1007/JHEP03(2014)002] using a nonperturbative approach in the framework of QCD, and it reads σtot˜B ln2s +C ln s ln ln s . We critically investigate if B and C can be obtained by means of best-fits to data for proton-proton and antiproton-proton scattering, including recent data obtained at the LHC, and also to data for other meson-baryon and baryon-baryon scattering processes. In particular, following the above-mentioned nonperturbative QCD approach, we also consider fits where the parameters B and C are set to B =κ Bth and C =κ Cth, where Bth and Cth are universal quantities related to the QCD stable spectrum, while κ (treated as an extra free parameter) is related to the asymptotic value of the ratio σel/σtot. Different possible scenarios are then considered and compared.

Near-Threshold Ionization of Argon by Positron Impact

NASA Astrophysics Data System (ADS)

Babij, T. J.; Machacek, J. R.; Murtagh, D. J.; Buckman, S. J.; Sullivan, J. P.

2018-03-01

The direct single-ionization cross section for Ar by positron impact has been measured in the region above the first ionization threshold. These measurements are compared to semiclassical calculations which give rise to a power law variation of the cross section in the threshold region. The experimental results appear to be in disagreement with extensions to the Wannier theory applied to positron impact ionization, with a smaller exponent than that calculated by most previous works. In fact, in this work, we see no difference in threshold behavior between the positron and electron cases. Possible reasons for this discrepancy are discussed.

Design and simulation of MEMS vector hydrophone with reduced cross section based meander beams

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kumar, Manoj; Dutta, S.; Pal, Ramjay

MEMS based vector hydrophone is being one of the key device in the underwater communications. In this paper, we presented a bio-inspired MEMS vector hydrophone. The hydrophone structure consists of a proof mass suspended by four meander type beams with reduced cross-section. Modal patterns of the structure were studied. First three modal frequencies of the hydrophone structure were found to be 420 Hz, 420 Hz and 1646 Hz respectively. The deflection and stress of the hydrophone is found have linear behavior in the 1 µPa – 1Pa pressure range.

Connection of the virtual γ*p cross section of ep deep inelastic scattering to real γp scattering, and the implications for νN and ep total cross sections

NASA Astrophysics Data System (ADS)

Block, Martin M.; Durand, Loyal; Ha, Phuoc

2014-05-01

We show that it is possible to fit all of the HERA deep inelastic scattering data on F2γp at small values of Bjorken x, including the data at very low Q2, using a new model for F2γp which both includes an asymptotic (high-energy) part that satisfies a saturated Froissart bound behavior, with a vector-dominance-like mass factor in the parametrization, and extends smoothly to Q2=0. We require that the corresponding part of the virtual γ*p cross section match the known asymptotic part of the real γp cross section at Q2=0, a cross section which is determined by strong interactions and asymptotically satisfies a saturated Froissart bound of the form α+βlns+γln2s. Using this model for the asymptotic part of F2γp plus a known valence contribution, we fit the asymptotic high-energy part of the HERA data with x ≤0.1 and W ≥25 GeV; the fit is excellent. We find that the mass parameter in the fit lies in the region of the light vector mesons, somewhat above the ρ-meson mass, and is compatible with vector dominance. We use this fit to obtain accurate results for the high-energy ep and isoscalar νN total cross sections. Both cross sections obey an analytic expression of the type a+blnE+cln2E+dln3E at large energies E of the incident particle, reflecting the fact that the underlying strong interaction parts of the γ*p, Z*N and W*N cross sections satisfy the saturated Froissart bound. Since approximately 50% of the νN center-of-mass (cms) energy is found in W—the cms energy of the strongly interacting intermediate vector boson-nucleon system—a study of ultra-high-energy neutrino-nucleon cross sections would allow us, for the first time, to explore strong interactions at incredibly high energies.

Risky online behaviors among adolescents: Longitudinal relations among problematic Internet use, cyberbullying perpetration, and meeting strangers online.

PubMed

Gámez-Guadix, Manuel; Borrajo, Erika; Almendros, Carmen

2016-03-01

Background and aims This study aims to analyze the cross-sectional and longitudinal relationship between three major risky online behaviors during adolescence: problematic Internet use, cyberbullying perpetration, and meeting strangers online. An additional objective was to study the role of impulsivity-irresponsibility as a possible explanatory variable of the relationships between these risky online behaviors. Methods The study sample was 888 adolescents that completed self-report measures at time 1 and time 2 with an interval of 6 months. Results The findings showed a significant cross-sectional relationship between the risky online behaviors analyzed. At the longitudinal level, problematic Internet use at time 1 predicted an increase in the perpetration of cyberbullying and meeting strangers online at time 2. Furthermore, meeting strangers online increased the likelihood of cyberbullying perpetration at time 2. Finally, when impulsivity-irresponsibility was included in the model as an explanatory variable, the relationships previously found remained significant. Discussion These results extend traditional problem behavior theory during adolescence, also supporting a relationship between different risky behaviors in cyberspace. In addition, findings highlighted the role of problematic Internet use, which increased the chances of developing cyberbullying perpetration and meeting strangers online over time. However, the results suggest a limited role of impulsivity-irresponsibility as an explicative mechanism. Conclusions The findings suggest that various online risk activities ought to be addressed together when planning assessment, prevention and intervention efforts.

Heavy Ion Fragmentation Experiments at the Bevatron

NASA Technical Reports Server (NTRS)

Heckman, H. H.

1975-01-01

Fragmentation processes of heavy nuclei in matter using the heavy-ion capability of the Bevatron were studied. The purpose was to obtain the single particle inclusive spectra of secondary nuclei produced at 0 deg by the fragmentation of heavy ion beam projectiles. The process being examined is B+T yields F + anything, where B is the beam nucleus, T is the target nucleus, and F is the detected fragment. The fragments F are isotopically identified by experimental procedures involving magnetic analysis, energy loss and time-of-flight measurements. Attempts were also made to: (1) measure the total and partial production cross section for all isotopes, (2) test the applicability of high-energy multi-particle interaction theory to nuclear fragmentation, (3) apply the cross-section data and fragmentation probabilities to cosmic ray transport theory, and (4) search for systematic behavior of fragment production as a means to improve existing semi-empirical theories of cross sections.

Optimal Shakedown of the Thin-Wall Metal Structures Under Strength and Stiffness Constraints

NASA Astrophysics Data System (ADS)

Alawdin, Piotr; Liepa, Liudas

2017-06-01

Classical optimization problems of metal structures confined mainly with 1st class cross-sections. But in practice it is common to use the cross-sections of higher classes. In this paper, a new mathematical model for described shakedown optimization problem for metal structures, which elements are designed from 1st to 4th class cross-sections, under variable quasi-static loads is presented. The features of limited plastic redistribution of forces in the structure with thin-walled elements there are taken into account. Authors assume the elastic-plastic flexural buckling in one plane without lateral torsional buckling behavior of members. Design formulae for Methods 1 and 2 for members are analyzed. Structures stiffness constrains are also incorporated in order to satisfy the limit serviceability state requirements. With the help of mathematical programming theory and extreme principles the structure optimization algorithm is developed and justified with the numerical experiment for the metal plane frames.

Binding energy and photoionization cross-section of hydrogen-like donor impurity in strongly oblate ellipsoidal quantum dot

NASA Astrophysics Data System (ADS)

Hayrapetyan, D. B.; Ohanyan, G. L.; Baghdasaryan, D. A.; Sarkisyan, H. A.; Baskoutas, S.; Kazaryan, E. M.

2018-01-01

Hydrogen-like donor impurity states in strongly oblate ellipsoidal quantum dot have been studied. The hydrogen-like donor impurity states are investigated within the framework of variational method. The trial wave function constructed on the base of wave functions of the system without impurity. The dependence of the energy and binding energy for the ground and first excited states on the geometrical parameters of the ellipsoidal quantum dot and on the impurity position have been calculated. The behavior of the oscillator strength for different angles of incident light and geometrical parameters have been revealed. Photoionization cross-section of the electron transitions from the impurity ground state to the size-quantized ground and first excited states have been studied. The effects of impurity position and the geometrical parameters of the ellipsoidal quantum dot on the photoionization cross section dependence on the photon energy have been considered.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Y.H. Feng; X.X. Zhang; M.L. Wu

The coke descending behavior in a CDQ cooling shaft is studied experimentally by means of a tracing method with a digital camera. For three different blast-caps, the law of coke flow is studied under five conditions of coke charge. The experimental results show that, for the sake of the uniformity of the coke burden descending, a blast-cap with elliptical cross-section is a better choice than that with circular cross-section regardless of high or low placement. A coke charge pattern with a flat top burden surface is preferable to that with peak-valley surface, a double-peak superior to a one-peak. Trajectory andmore » average velocity distribution of coke behavior depend weakly on whether the coke is continuously fed or not as the discharging began. The blast-caps have local effects on the descending coke and hardly affect whether the cokes flow smoothly or not in the case of coke burden with enough depth.« less

Nutritional attitudes of homosexual people living with human immunodeficiency virus (HIV) in Chongqing, Southwest China: a cross-sectional study.

PubMed

Zhou, Wenjie; Ma, Rui; Sharma, Manoj; Zhao, Yong

This article aimed at understanding nutritional knowledge, attitudes, and behaviors of homosexual persons living with HIV/AIDS in Chongqing, China. A cross sectional design using a valid and reliable survey was used. The survey was completed in Chongqing, Southwest China (n = 172). Knowledge of nutrition was deficient regarding sources of nutrients such as calcium and iron, relationships between diet/nutrients and disease, and only 36.1% of participants knew about the Balanced Diet Pagoda for Chinese. Eating habits did not meet the nutritional requirements, and a majority (59.3%) did not eat breakfast every day. The average score on the knowledge quiz was 51.8%. This study showed that homosexual persons with HIV/AIDS in China longed for nutrition knowledge, and this was supported by objective data. Efforts and targeted education programs aiming to improve their nutrition knowledge, attitudes, and behaviors need to be emphasized.

A transmission electron microscopy study of the deformation behavior underneath nanoindents in nanoscale Al-TiN multilayered composites

NASA Astrophysics Data System (ADS)

Bhattacharyya, D.; Mara, N. A.; Dickerson, P.; Hoagland, R. G.; Misra, A.

2010-05-01

Nanoscale multilayered Al-TiN composites were deposited using the dc magnetron sputtering technique in two different layer thickness ratios, Al : TiN = 1 : 1 and Al : TiN = 9 : 1. The Al layer thickness varied from 2 nm to 450 nm. The hardness of the samples was tested by nanoindentation using a Berkovich tip. Cross-sectional transmission electron microscopy (TEM) was carried out on samples extracted with focused ion beam from below the nanoindents. The results of the hardness tests on the Al-TiN multilayers with two different thickness ratios are presented, together with observations from the cross-sectional TEM studies of the regions underneath the indents. These studies revealed remarkable strength in the multilayers, as well as some very interesting deformation behavior in the TiN layers at extremely small length scales, where the hard TiN layers undergo co-deformation with the Al layers.

Extrinsic extinction cross-section in the multiple acoustic scattering by fluid particles

NASA Astrophysics Data System (ADS)

Mitri, F. G.

2017-04-01

Cross-sections (and their related energy efficiency factors) are physical parameters used in the quantitative analysis of different phenomena arising from the interaction of waves with a particle (or multiple particles). Earlier works with the acoustic scattering theory considered such quadratic (i.e., nonlinear) quantities for a single scatterer, although a few extended the formalism for a pair of scatterers but were limited to the scattering cross-section only. Therefore, the standard formalism applied to viscous particles is not suitable for the complete description of the cross-sections and energy balance of the multiple-particle system because both absorption and extinction phenomena arise during the multiple scattering process. Based upon the law of the conservation of energy, this work provides a complete comprehensive analysis for the extrinsic scattering, absorption, and extinction cross-sections (i.e., in the far-field) of a pair of viscous scatterers of arbitrary shape, immersed in a nonviscous isotropic fluid. A law of acoustic extinction taking into consideration interparticle effects in wave propagation is established, which constitutes a generalized form of the optical theorem in multiple scattering. Analytical expressions for the scattering, absorption, and extinction cross-sections are derived for plane progressive waves with arbitrary incidence. The mathematical expressions are formulated in partial-wave series expansions in cylindrical coordinates involving the angle of incidence, the addition theorem for the cylindrical wave functions, and the expansion coefficients of the scatterers. The analysis shows that the multiple scattering cross-section depends upon the expansion coefficients of both scatterers in addition to an interference factor that depends on the interparticle distance. However, the extinction cross-section depends on the expansion coefficients of the scatterer located in a particular system of coordinates, in addition to the interference term. Numerical examples illustrate the analysis for two viscous fluid circular cylindrical cross-sections immersed in a non-viscous fluid. Computations for the (non-dimensional) scattering, absorption, and extinction cross-section factors are performed with particular emphasis on varying the angle of incidence, the interparticle distance, and the sizes, and the physical properties of the particles. A symmetric behavior is observed for the dimensionless multiple scattering cross-section, while asymmetries arise for both the dimensionless absorption and extinction cross-sections with respect to the angle of incidence. The present analysis provides a complete analytical and computational method for the prediction of cross-section and energy efficiency factors in multiple acoustic scattering of plane waves of arbitrary incidence by a pair of scatterers. The results can be used as a priori information in the direct or inverse characterization of multiple scattering systems such as acoustically engineered fluid metamaterials with reconfigurable periodicities, cloaking devices, liquid crystals, and other applications.

Breast cancer prevention information seeking behavior and interest on cell phone and text use: a cross-sectional study in Malaysia.

PubMed

Akhtari-Zavare, Mehrnoosh; Ghanbari-Baghestan, Abbas; Latiff, Latiffah A; Khaniki, Hadi

2015-01-01

Breast cancer is the most common cancer and the second principal cause of cancer deaths among women worldwide, including Malaysia. This study focused on media choice and attempted to determine the communication channels mostly used and preferred by women in seeking information and knowledge about breast cancer. A cross sectional study was carried out to examine the breast cancer prevention information seeking behavior among 450 students at one private university in Malaysia. The mean age of respondents was 25±4.3 years. Common interpersonal information sources were doctors, friends, and nurses and common channel information sources were television, brochure, and internet. Overall, 89.9% used cell phones, 46.1% had an interest in receiving cell phone breast cancer prevention messages, 73.9% used text messaging, and 36.7% had an interest in receiving text breast cancer prevention messages. Bivariate analysis revealed significant differences among age, eduation, nationality and use of cell phones. Assessment of health information seeking behavior is important for community health educators to target populations for program development.

Health-Promoting Behaviors and Their Predictors in Iranian Women of Reproductive Age: A Cross-Sectional Study.

PubMed

Bakouei, Sareh; Bakouei, Fatemeh; Omidvar, Shabnam; Bakhtiari, Afsaneh

2017-10-01

Health-promoting behaviors are one of the main determinative components of health in the prevention of many diseases. This cross-sectional study aimed to determine health-promoting behaviors and their relationship to sociodemographic variables on 330 women of reproductive age admitted to the selected primary health-care centers in Qom city (one of the biggest cities in Iran) from March 2016 to July 2016. Data were collected using the health-promoting lifestyle profile II (HPLP-II) questionnaire and the sociodemographic characteristics and also were analyzed by one-way analysis of variance, with post hoc (if necessary), and multivariable linear regression. The total HPLP-II mean score of women was 136.64 ± 22.37. The highest score in the HPLP-II subscales of women was found for interpersonal relations subscale (26.43 ± 4.21) and the lowest score for physical activity subscale (14.66 ± 4.62). The educational level and income had significant association with some subscales ( p < .05).

Modeling of molecular nitrogen collisions and dissociation processes for direct simulation Monte Carlo.

PubMed

Parsons, Neal; Levin, Deborah A; van Duin, Adri C T; Zhu, Tong

2014-12-21

The Direct Simulation Monte Carlo (DSMC) method typically used for simulating hypersonic Earth re-entry flows requires accurate total collision cross sections and reaction probabilities. However, total cross sections are often determined from extrapolations of relatively low-temperature viscosity data, so their reliability is unknown for the high temperatures observed in hypersonic flows. Existing DSMC reaction models accurately reproduce experimental equilibrium reaction rates, but the applicability of these rates to the strong thermal nonequilibrium observed in hypersonic shocks is unknown. For hypersonic flows, these modeling issues are particularly relevant for nitrogen, the dominant species of air. To rectify this deficiency, the Molecular Dynamics/Quasi-Classical Trajectories (MD/QCT) method is used to accurately compute collision and reaction cross sections for the N2(Σg+1)-N2(Σg+1) collision pair for conditions expected in hypersonic shocks using a new potential energy surface developed using a ReaxFF fit to recent advanced ab initio calculations. The MD/QCT-computed reaction probabilities were found to exhibit better physical behavior and predict less dissociation than the baseline total collision energy reaction model for strong nonequilibrium conditions expected in a shock. The MD/QCT reaction model compared well with computed equilibrium reaction rates and shock-tube data. In addition, the MD/QCT-computed total cross sections were found to agree well with established variable hard sphere total cross sections.

Promoting tolerance and moral engagement through peer modeling.

PubMed

McAlister, A L; Ama, E; Barroso, C; Peters, R J; Kelder, S

2000-11-01

Behavioral journalism influences audiences by presenting peer modeling for cognitive processes that lead to behavior change. This technique was used in student newsletters promoting intergroup tolerance and moral engagement in a Houston high school with a diverse ethnic composition. Pretest (N = 393) and posttest (N = 363) cross-sectional comparisons of the student population in that school provided evidence of short-term (6 month) communication effects on attitudes and behavior. Tolerance and moral engagement increased among students in the school where behavioral journalism newsletters were distributed, and there was a corresponding reduction in hostile behavioral intentions and in reports of verbal aggression.

Steel-reinforced concrete-filled steel tubular columns under axial and lateral cyclic loading

NASA Astrophysics Data System (ADS)

Farajpourbonab, Ebrahim; Kute, Sunil Y.; Inamdar, Vilas M.

2018-03-01

SRCFT columns are formed by inserting a steel section into a concrete-filled steel tube. These types of columns are named steel-reinforced concrete-filled steel tubular (SRCFT) columns. The current study aims at investigating the various types of reinforcing steel section to improve the strength and hysteresis behavior of SRCFT columns under axial and lateral cyclic loading. To attain this objective, a numerical study has been conducted on a series of composite columns. First, FEM procedure has been verified by the use of available experimental studies. Next, eight composite columns having different types of cross sections were analyzed. For comparison purpose, the base model was a CFT column used as a benchmark specimen. Nevertheless, the other specimens were SRCFT types. The results indicate that reinforcement of a CFT column through this method leads to enhancement in load-carrying capacity, enhancement in lateral drift ratio, ductility, preventing of local buckling in steel shell, and enhancement in energy absorption capacity. Under cyclic displacement history, it was observed that the use of cross-shaped reinforcing steel section causes a higher level of energy dissipation and the moment of inertia of the reinforcing steel sections was found to be the most significant parameter affecting the hysteresis behavior of SRCFT columns.

Light intensity physical activity and sedentary behavior in relation to body mass index and grip strength in older adults: cross-sectional findings from the Lifestyle Interventions and Independence for Elders (LIFE) study

USDA-ARS?s Scientific Manuscript database

Background: Identifying modifiable determinants of fat mass and muscle strength in older adults is important given their impact on physical functioning and health. Light intensity physical activity and sedentary behavior are potential determinants, but their relations to these outcomes are poorly un...

Nutrition Knowledge Predicts Eating Behavior of All Food Groups "except" Fruits and Vegetables among Adults in the Paso del Norte Region: Que Sabrosa Vida

ERIC Educational Resources Information Center

Sharma, Shreela V.; Gernand, Alison D.; Day, R. Sue

2008-01-01

Objective: To examine the association between nutrition knowledge and eating behavior in a predominantly Mexican American population on the Texas-Mexico border. Design: Cross-sectional using data from the baseline survey of the Que Sabrosa Vida community nutrition initiative. Setting: El Paso and surrounding counties in Texas. Participants: Data…

Onset of Smoking Behaviors and Participation in Leisure Physical Activities of Turkish Adolescents Attending Vocational Health Schools

ERIC Educational Resources Information Center

Subasi, Feryal; Hey, William; Mumcu, Gonca; Koksal, Leyla; Luleci, Emel; Sur, Haydar

2006-01-01

This cross-sectional study was conducted with the aim of examining the relationships between smoking behavior and leisure physical activity habits of adolescents (n=170, 85F & 85M, mean age= 15.42 [plus or minus] 0.58, age range=15-17 years) attending vocational health schools in Turkey. Participants were randomly selected from four provinces…

Associations between Sexual Abuse and Family Conflict/Violence, Self-Injurious Behavior, and Substance Use: The Mediating Role of Depressed Mood and Anger

ERIC Educational Resources Information Center

Asgeirsdottir, Bryndis Bjork; Sigfusdottir, Inga Dora; Gudjonsson, Gisli H.; Sigurdsson, Jon Fridrik

2011-01-01

Objective: To examine whether depressed mood and anger mediate the effects of sexual abuse and family conflict/violence on self-injurious behavior and substance use. Methods: A cross-sectional national survey was conducted including 9,085 16-19 year old students attending all high schools in Iceland in 2004. Participants reported frequency of…

Links between Self-Reported Media Violence Exposure and Teacher Ratings of Aggression and Prosocial Behavior among German Adolescents

ERIC Educational Resources Information Center

Krahe, Barbara; Moller, Ingrid

2011-01-01

The relations between adolescents' habitual usage of media violence and their tendency to engage in aggressive and prosocial behavior in a school setting were examined in a cross-sectional study with 1688 7th and 8th graders in Germany who completed measures of violent media exposure and normative acceptance of aggression. For each participant,…

Diet- and Body Size-Related Attitudes and Behaviors Associated with Vitamin Supplement Use in a Representative Sample of Fourth-Grade Students in Texas

ERIC Educational Resources Information Center

George, Goldy C.; Hoelscher, Deanna M.; Nicklas, Theresa A.; Kelder, Steven H.

2009-01-01

Objective: To examine diet- and body size-related attitudes and behaviors associated with supplement use in a representative sample of fourth-grade students in Texas. Design: Cross-sectional data from the School Physical Activity and Nutrition study, a probability-based sample of schoolchildren. Children completed a questionnaire that assessed…

Gender, Alcohol Consumption Patterns, and Engagement in Sexually Intimate Behaviors among Adolescents and Young Adults in Nha Trang, Viet Nam

ERIC Educational Resources Information Center

Kaljee, Linda M.; Green, Mackenzie S.; Zhan, Min; Riel, Rosemary; Lerdboon, Porntip; Lostutter, Ty W.; Tho, Le Huu; Luong, Vo Van; Minh, Truong Tan

2011-01-01

A randomly selected cross-sectional survey was conducted with 880 youth (16 to 24 years) in Nha Trang City to assess relationships between alcohol consumption and sexual behaviors. A timeline followback method was employed. Chi-square, generalized logit modeling and logistic regression analyses were performed. Of the sample, 78.2% male and 56.1%…

A spectral-Tchebychev solution for three-dimensional dynamics of curved beams under mixed boundary conditions

NASA Astrophysics Data System (ADS)

Bediz, Bekir; Aksoy, Serdar

2018-01-01

This paper presents the application of the spectral-Tchebychev (ST) technique for solution of three-dimensional dynamics of curved beams/structures having variable and arbitrary cross-section under mixed boundary conditions. To accurately capture the vibrational behavior of curved structures, a three-dimensional (3D) solution approach is required since these structures generally exhibit coupled motions. In this study, the integral boundary value problem (IBVP) governing the dynamics of the curved structures is found using extended Hamilton's principle where the strain energy is expressed using 3D linear elasticity equation. To solve the IBVP numerically, the 3D spectral Tchebychev (3D-ST) approach is used. To evaluate the integral and derivative operations defined by the IBVP and to render the complex geometry into an equivalent straight beam with rectangular cross-section, a series of coordinate transformations are applied. To validate and assess the performance of the presented solution approach, two case studies are performed: (i) curved beam with rectangular cross-section, (ii) curved and pretwisted beam with airfoil cross-section. In both cases, the results (natural frequencies and mode shapes) are also found using a finite element (FE) solution approach. It is shown that the difference in predicted natural frequencies are less than 1%, and the mode shapes are in excellent agreement based on the modal assurance criteria (MAC) analyses; however, the presented spectral-Tchebychev solution approach significantly reduces the computational burden. Therefore, it can be concluded that the presented solution approach can capture the 3D vibrational behavior of curved beams as accurately as an FE solution, but for a fraction of the computational cost.

Anxiety, worry and cognitive risk estimate in relation to protective behaviors during the 2009 influenza A/H1N1 pandemic in Hong Kong: ten cross-sectional surveys

PubMed Central

2014-01-01

Background Few studies have investigated associations between psychological and behavioral indices throughout a major epidemic. This study was aimed to compare the strength of associations between different cognitive and affective measures of risk and self-reported protective behaviors in a series of ten cross-sectional surveys conducted throughout the first wave of influenza A/H1N1 pandemic. Methods All surveys were conducted using questionnaire-based telephone interviews, with random digit dialing to recruit adults from the general population. Measures of anxiety and worry (affective) and perceived risk (cognitive) regarding A/H1N1 were made in 10 serial surveys. Multivariate logistic regression models were used to estimate the cognitive/affective-behavioral associations in each survey while multilevel logistic models were conducted to estimate the average effects of each cognitive/affective measure on adoption of protective behaviors throughout the ten surveys. Results Excepting state anxiety, other affective measures including “anticipated worry”, “experienced worry” and “current worry” specific to A/H1N1 risk were consistently and strongly associated with adoption of protective behaviors across different survey periods. However, the cognitive-behavioral associations were weaker and inconsistent across the ten surveys. Perceived A/H1N1 severity relative to SARS had stronger associations with adoption of protective behaviors in the late epidemic periods than in the early epidemic periods. Conclusion Risk-specific worries appear to be significantly associated with the adoption of protective behaviors at different epidemic stages, whereas cognitive measures may become more important in understanding people’s behavioral responses later in epidemics. Future epidemic-related psycho-behavioral research should include more affective-loaded measures of risk. PMID:24674239

Re-Evaluation of the Lower San Fernando Dam. Report 3. The Behavior of Undrained Contractive Sand and Its Effect on Seismic Liquefaction Flow Failures of Earth Structures

DTIC Science & Technology

1989-09-01

34 nrn. 4th World Crnf. n 7rthquake Engr., Vol 2, Santiago , Chile , pp. 1-11. 137. Seed, H.B., Lee, K.L. and Idriss, I.M. (1969): "An Analysis of...391 Fig. 8.10. Approximate Sections Through Large Slide Area Near Lake Rinihue, Chile (after Seed, 1967) . . . 392 Fig. 8.11. Cross Section of...to clarify the fundamental behavior of these soils. Previous work on contractive sands concentrated on steady-state or residual strength

A conceptual model of nurses' goal orientation, service behavior, and service performance.

PubMed

Chien, Chun-Cheng; Chou, Hsin-Kai; Hung, Shuo-Tsung

2008-01-01

Based on the conceptual framework known as the "service triangle," the authors constructed a model of nurses' goal orientation, service behavior, and service performance to investigate the antecedents and consequences of the medical service behavior provided by nurses. This cross-sectional study collected data from 127 nurses in six hospitals using a mail-in questionnaire. Analysis of the model revealed that the customer-oriented behavior of nurses had a positive influence on organizational citizenship behavior; and both of these behaviors had a significant positive influence on service performance. The results also indicate that a higher learning goal orientation among nurses was associated with the performance of both observable customer-oriented behavior and organizational-citizenship behavior.

Off-energy-shell p-p scattering at sub-Coulomb energies via the Trojan horse method

DOE Office of Scientific and Technical Information (OSTI.GOV)

Tumino, A.; Dipartimento di Metodologie Fisiche e Chimiche per l'Ingegneria, Universita di Catania, Catania; Universita Kore di Enna, Enna

2008-12-15

Two-proton scattering at sub-Coulomb energies has been measured indirectly via the Trojan horse method applied to the p + d{yields}p + p + n reaction to investigate off-energy shell effects for scattering processes. The three-body experiment was performed at 5 and 4.7 MeV corresponding to a p-p relative energy ranging from 80 to 670 keV. The free p-p cross section exhibits a deep minimum right within this relative energy region due to Coulomb plus nuclear destructive interference. No minimum occurs instead in the Trojan horse p-p cross section, which was extracted by employing a simple plane-wave impulse approximation. A detailedmore » formalism was developed to build up the expression of the theoretical half-off-shell p-p cross section. Its behavior agrees with the Trojan horse data and in turn formally fits the n-n, n-p, and nuclear p-p cross sections given the fact that in its expression the Coulomb amplitude is negligible with respect to the nuclear one. These results confirm the Trojan horse suppression of the Coulomb amplitude for scattering due to the off-shell character of the process.« less

HIV/AIDS preventive self-efficacy, depressive symptoms, and risky sexual behavior in adolescents: a cross-sectional questionnaire survey.

PubMed

Lee, Yi-Hui; Salman, Ali; Fitzpatrick, Joyce J

2009-05-01

High incidence rates of HIV/AIDS infections among youth draw attention to the need for emphasizing the reduction of risky sexual behavior, a major contributor to the spread of HIV/AIDS. Few researchers have examined the relationship between self-efficacy for HIV/AIDS preventions, depressive symptoms, and adolescent risky sexual behavior. This insufficient understanding limits nurses' ability to provide effective programs for reducing adolescents' risky sexual behaviors. This study was conducted to investigate the relationships among HIV/AIDS preventive self-efficacy, depressive symptoms, and risky sexual behavior in Taiwanese adolescents. A cross-sectional, correlational study. Seven vocational high schools located in a metropolitan area in southern Taiwan. A convenience sample of 16-18-year-old vocational high school Taiwanese adolescents (n=734) participated in this study. Several self-administrated questionnaires, including HIV/AIDS Preventive Self-efficacy scale, the Center for Epidemiological Studies-Depression scale, Safe Sex Behavior Questionnaire, and a form for demographic data, were used to collect data. Taiwanese adolescents who had higher HIV/AIDS preventive self-efficacy scores had less overall risky sexual behavior. Adolescents who had less depressive symptoms had higher HIV/AIDS preventive self-efficacy. More depressive symptoms were correlated to more risky sexual behavior. Improving Taiwanese adolescents' HIV/AIDS preventive self-efficacy could be useful to reduce risky sexual behaviors in this population. Results of this study may assist nurses in understanding factors related to adolescents HIV/AIDS related risky sexual behavior and its' preventions. However, future longitudinal studies are needed to clarify whether depressive symptoms is a major influential factor that might interfere with the effectiveness of HIV/AIDS prevention programs.

Radar cross-section reduction based on an iterative fast Fourier transform optimized metasurface

NASA Astrophysics Data System (ADS)

Song, Yi-Chuan; Ding, Jun; Guo, Chen-Jiang; Ren, Yu-Hui; Zhang, Jia-Kai

2016-07-01

A novel polarization insensitive metasurface with over 25 dB monostatic radar cross-section (RCS) reduction is introduced. The proposed metasurface is comprised of carefully arranged unit cells with spatially varied dimension, which enables approximate uniform diffusion of incoming electromagnetic (EM) energy and reduces the threat from bistatic radar system. An iterative fast Fourier transform (FFT) method for conventional antenna array pattern synthesis is innovatively applied to find the best unit cell geometry parameter arrangement. Finally, a metasurface sample is fabricated and tested to validate RCS reduction behavior predicted by full wave simulation software Ansys HFSSTM and marvelous agreement is observed.

Optimal utilization of total elastic scattering cross section data for the determination of interatomic potentials

NASA Technical Reports Server (NTRS)

Bernstein, R. B.; Labudde, R. A.

1972-01-01

The problem of inversion is considered in relation to absolute total cross sections Q(v) for atom-atom collisions and their velocity dependence, and the glory undulations and the transition to high velocity behavior. There is a limit to the amount of information available from Q(v) even when observations of good accuracy (e.g., + or - 0.25%) are in hand over an extended energy range (from thermal energies upward by a factor of greater than 1000 in relative kinetic energy). Methods were developed for data utilization, which take full advantage of the accuracy of the experimental Q(v) measurements.

Connecting Ellipses to Rectangles in Passive Scalar Transport

NASA Astrophysics Data System (ADS)

Aminian, Manuchehr; Bernardi, Francesca; Camassa, Roberto; Harris, Daniel; McLaughlin, Richard

2017-11-01

We study how passive scalar transport in Poiseuille flow is affected by the shape of the pipe cross section. Our previous results have established nontrivial dependence of the skewness of the tracer distribution upon the pipe shape. Previously, we have studied the families of rectangles and ellipses, with the behavior past diffusive timescales primarily depending on aspect ratio, and the type of geometry being secondary. However, at timescales well before the diffusion timescale, the family of ellipses is distinct compared to rectangles. We investigate this phenomenon by studying a collection of exotic cross sections connecting the ellipses and rectangles, using a combination of theoretical and computational tools.

Solutions of the Helmholtz equation with boundary conditions for force-free magnetic fields

NASA Technical Reports Server (NTRS)

Rasband, S. N.; Turner, L.

1981-01-01

It is shown that the solution, with one ignorable coordinate, for the Taylor minimum energy state (resulting in a force-free magnetic field) in either a straight cylindrical or a toroidal geometry with arbitrary cross section can be reduced to the solution of either an inhomogeneous Helmholtz equation or a Grad-Shafranov equation with simple boundary conditions. Standard Green's function theory is, therefore, applicable. Detailed solutions are presented for the Taylor state in toroidal and cylindrical domains having a rectangular cross section. The focus is on solutions corresponding to the continuous eigenvalue spectra. Singular behavior at 90 deg corners is explored in detail.

Triple Photoionization of Neon and Argon Near Threshold

NASA Astrophysics Data System (ADS)

Bluett, Jaques B.; Lukić, Dragan; Sellin, Ivan A.; Whitfield, Scott B.; Wehlitz, Ralf

2003-05-01

The threshold behavior of the triple ionization cross-section of neon and argon was investigated using monochromatized synchrotron radiation and ion time-of-flight spectrometry. The Ne^3+ and Ar^3+ cross-sections are found to follow the Wannier power law(G.H. Wannier, Phys. Rev. 90), 817 (1953). consistent with a Wannier exponent of 2.162 predicted by theory. This is also consistent with the findings of Samson and Angel(J.A.R. Samson and G.C. Angel, Phys. Lett. 61), 1584 (1988). for the case of Ne. In the case of argon we find a much shorter range of validity than for neon.

USING THE THEORY OF PLANNED BEHAVIOR TO DETERMINE THE CONDOM USE BEHAVIOR AMONG COLLEGE STUDENTS

PubMed Central

Asare, Matthew

2015-01-01

The study utilized the Theory of Planned Behavior (TPB) to determine condom use behavior among college students. A total of 218 college students with mean age of 20.9 years old participated in the study. A 32- item cross-sectional survey was administered among the participants. The constructs of attitude towards behavior, perceived behavioral control, and subjective norm (p<0.001) significantly predicted intention to use condoms and they accounted for 64% of the variance. Behavioral intention significantly predicted condom use and it accounted for 15% of the variance. The TPB could be used to guide programs in promoting condom use among college students. PMID:26512197

Beverage Intake, Smoking Behavior, and Alcohol Consumption in Contemporary China-A Cross-Sectional Analysis from the 2011 China Health and Nutrition Survey.

PubMed

Lee, Yen-Han; Wang, Zhi; Chiang, Timothy C; Liu, Ching-Ti

2017-05-07

Chinese residents enjoy various types of beverages in their daily life. With the rapid Westernization of contemporary China, several adverse health concerns-such as diabetes linked to sweetened beverages-have emerged. Until now, no research that examines associations between beverage consumption and smoking/drinking behaviors has been made available, despite the large Chinese populations partaking in such activities. We conducted a cross-sectional study to explore the association between beverage intake frequencies and smoking/drinking behaviors in 12,634 adult respondents who participated in the latest wave (2011) of the China Health and Nutrition Survey (CHNS). Further, we applied Tukey's Honest Significance test for pairwise comparisons. We defined the consumption categories as daily (at least one serving per day), weekly (less than one serving per day, at least one serving per week), monthly (less than one serving per week, at least one serving per month), and less than monthly or none-for sweetened beverage, water, tea, and coffee consumptions. The data showed that both tea and sweetened beverages are associated with smoking/drinking behaviors. Compared to respondents who consume tea and sweetened beverages daily, the odds of smoking behaviors are lower for those who consume such beverages less frequently. Further policy implications are discussed, including higher taxes on sweetened beverages and lessons from other countries.

Beverage Intake, Smoking Behavior, and Alcohol Consumption in Contemporary China—A Cross-Sectional Analysis from the 2011 China Health and Nutrition Survey

PubMed Central

Lee, Yen-Han; Wang, Zhi; Chiang, Timothy C.; Liu, Ching-Ti

2017-01-01

Chinese residents enjoy various types of beverages in their daily life. With the rapid Westernization of contemporary China, several adverse health concerns—such as diabetes linked to sweetened beverages—have emerged. Until now, no research that examines associations between beverage consumption and smoking/drinking behaviors has been made available, despite the large Chinese populations partaking in such activities. We conducted a cross-sectional study to explore the association between beverage intake frequencies and smoking/drinking behaviors in 12,634 adult respondents who participated in the latest wave (2011) of the China Health and Nutrition Survey (CHNS). Further, we applied Tukey’s Honest Significance test for pairwise comparisons. We defined the consumption categories as daily (at least one serving per day), weekly (less than one serving per day, at least one serving per week), monthly (less than one serving per week, at least one serving per month), and less than monthly or none—for sweetened beverage, water, tea, and coffee consumptions. The data showed that both tea and sweetened beverages are associated with smoking/drinking behaviors. Compared to respondents who consume tea and sweetened beverages daily, the odds of smoking behaviors are lower for those who consume such beverages less frequently. Further policy implications are discussed, including higher taxes on sweetened beverages and lessons from other countries. PMID:28481283

Social influences, social norms, social support, and smoking behavior among adolescent workers.

PubMed

Fagan, P; Eisenberg, M; Stoddard, A M; Frazier, L; Sorensen, G

2001-01-01

To examine the relationships between worksite interpersonal influences and smoking and quitting behavior among adolescent workers. The cross-sectional survey assessed factors influencing tobacco use behavior. During the fall of 1998, data were collected from 10 grocery stores in Massachusetts that were owned and managed by the same company. Eligible participants included 474 working adolescents ages 15 to 18. Eighty-three percent of workers (n = 379) completed the survey. The self-report questionnaire assessed social influences, social norms, social support, friendship networks, stage of smoking and quitting behavior, employment patterns, and demographic factors. Thirty-five percent of respondents were never smokers, 21% experimental, 5% occasional, 18% regular, and 23% former smokers. Using analysis of variance (ANOVA), results indicate that regular smokers were 30% more likely than experimental or occasional smokers to report coworker encouragement to quit (p = .0002). Compared with regular smokers, never smokers were 15% more likely to report greater nonacceptability of smoking (p = .01). chi 2 tests of association revealed no differences in friendship networks by stage of smoking. These data provide evidence for the need to further explore social factors inside and outside the work environment that influence smoking and quitting behavior among working teens. Interpretations of the data are limited because of cross-sectional and self-report data collection methods used in one segment of the retail sector.

Family Health Climate and Adolescents' Physical Activity and Healthy Eating: A Cross-Sectional Study with Mother-Father-Adolescent Triads.

PubMed

Niermann, Christina Y N; Kremers, Stef P J; Renner, Britta; Woll, Alexander

2015-01-01

The importance of the family environment for children's and adolescents' health behavior has been demonstrated, the underlying mechanisms of this influence remain unclear. Therefore, the aim of the study was to investigate the relationship between family environmental and individual determinants. It was hypothesized that the Family Health Climate (FHC) is associated with adolescents' physical activity and dietary behavior and that intrinsic motivation mediates this association. Cross-sectional data were collected from 198 families (mother, father, and child) using questionnaires. Perceptions of FHC of mothers, fathers, and their children were assessed using the FHC-scales for physical activity (FHC-PA) and nutrition (FHC-NU). The adolescents also rated their intrinsic motivation for exercise and healthy eating, their physical activity and consumption of healthful food. A structural equation model was analyzed and a bootstrapping procedure was used to test direct and indirect effects. The FHC-PA was related to the amount of weekly physical activity and the FHC-NU to the consumption of fruit, vegetables and salad. These effects were mediated by adolescents' intrinsic motivation; the indirect effects were significant for both behaviors. These results emphasize the importance of the FHC in shaping adolescents' physical activity and dietary behavior. Individual motivational factors are potential mediators of family and parental influences. Considering family-level variables and their interaction with individual factors contributes to the understanding of adolescents' health behavior.

Integrated Theory of Planned Behavior with Extrinsic Motivation to Predict Intention Not to Use Illicit Drugs by Fifth-Grade Students in Taiwan

ERIC Educational Resources Information Center

Liao, Jung-Yu; Chang, Li-Chun; Hsu, Hsiao-Pei; Huang, Chiu-Mieh; Huang, Su-Fei; Guo, Jong-Long

2017-01-01

This study assessed the effects of a model that integrated the theory of planned behavior (TPB) with extrinsic motivation (EM) in predicting the intentions of fifth-grade students to not use illicit drugs. A cluster-sampling design was adopted in a cross-sectional survey (N = 571). The structural equation modeling results showed that the model…

Talking about Quitting: Interpersonal Communication as a Mediator of Campaign Effects on Smokers’ Quit Behaviors

PubMed Central

Jeong, Michelle; Tan, Andy; Brennan, Emily; Gibson, Laura; Hornik, Robert C.

2015-01-01

This study examined the role of interpersonal communication in the context of a mass media anti-smoking campaign. Specifically, it explored whether conversations about campaign ads and/or about quitting mediated campaign exposure effects on two quitting behaviors (sought help to quit and tried to quit smoking completely), as well as the relationship between ad-related and quitting-related conversations. Data were collected prior to the campaign and monthly for 16 months during the campaign through cross-sectional telephone surveys among a sample of 3277 adult Philadelphian smokers. Follow-up interviews were conducted among 877 participants three months after their first survey. Cross-sectional and longitudinal mediation models with bootstrap procedures assessed the indirect effects of campaign exposure on outcomes through conversations, and of conversations about ads on outcomes through conversations about quitting. In addition, lagged regression analyses tested the causal direction of associations between the variables of interest. The results partially support hypotheses that conversations about quitting mediate campaign effects on quitting-related behaviors, and, in line with previous research, that conversations about the ads have indirect effects on quitting-related behaviors by triggering conversations about quitting. These findings demonstrate the importance of considering interpersonal communication as a route of campaign exposure effects when evaluating and designing future public health campaigns. PMID:26147367

Authoritative School Climate and High School Student Risk Behavior: A Cross-sectional Multi-level Analysis of Student Self-Reports.

PubMed

Cornell, Dewey; Huang, Francis

2016-11-01

Many adolescents engage in risk behaviors such as substance use and aggression that jeopardize their healthy development. This study tested the hypothesis that an authoritative school climate characterized by strict but fair discipline and supportive teacher-student relationships is conducive to lower risk behavior for high school students. Multilevel logistic regression models were used to analyze cross-sectional, student-report survey data from a statewide sample of 47,888 students (50.6 % female) in 319 high schools. The students included ninth (26.6 %), tenth (25.5 %), eleventh (24.1 %) and twelfth (23.8 %) grade with a racial/ethnic breakdown of 52.2 % White, 18.0 % Black, 13.1 % Hispanic, 5.9 % Asian, and 10.8 % reporting another or two or more race/ethnicities. Schools with an authoritative school climate had lower levels of student-reported alcohol and marijuana use; bullying, fighting, and weapon carrying at school; interest in gang membership; and suicidal thoughts and behavior. These results controlled for demographic variables of student gender, race, grade, and parent education level as well as school size, percentage of minority students, and percentage of low income students. Overall, these findings add new evidence that an authoritative school climate is associated with positive student outcomes.

Femoral strength and posture in terrestrial birds and non-avian theropods.

PubMed

Farke, Andrew A; Alicea, Justy

2009-09-01

Osteological and experimental evidence suggest a change in femoral posture between non-avian dinosaurs (in which the femur presumably was carried in a subvertical position) and birds (in which the femur is held nearly horizontal during most phases of terrestrial locomotion). In this study, we used a broad comparative sample to test the hypothesis that cross-sectional properties of the femur records evidence of this presumed change in posture. I(max) and I(min) (second moment of area, related to resistance to bending) and cross-sectional area (indicating resistance to compression) were measured from computed tomography scans of the femora of 30 species of flightless or primarily terrestrial birds, one probable non-dinosaur dinosauromorph, and at least four species of non-avian theropods. It was predicted that birds should have more eccentrically shaped femoral midshafts as measured by I(max)/II(min) (reflecting greater bending) and comparatively smaller cross-sectional areas than non-avians. Results show that no significant differences occur between non-avian dinosaurs and birds for any parameter, and the samples overlapped broadly in many cases. Thus, cross-sectional properties cannot be used to infer differences in femoral posture between the two groups. This surprising finding might be explained by the fact that femoral postures were not drastically different or that a gradation of postures occurred in each sample. It is also possible that bone loading during life was not closely correlated with cross-sectional morphology. We conclude that cross-sectional properties should be used with caution in determining the posture and behaviors of extinct animals, and only in conjunction with other morphological information. (c) 2009 Wiley-Liss, Inc.

A dependence of quasielastic charged-current neutrino-nucleus cross sections

NASA Astrophysics Data System (ADS)

Van Dessel, N.; Jachowicz, N.; González-Jiménez, R.; Pandey, V.; Van Cuyck, T.

2018-04-01

Background: 12C has been and is still widely used in neutrino-nucleus scattering and oscillation experiments. More recently, 40Ar has emerged as an important nuclear target for current and future experiments. Liquid argon time projection chambers (LArTPCs) possess various advantages in measuring electroweak neutrino-nucleus cross sections. Concurrent theoretical research is an evident necessity. Purpose: 40Ar is larger than 12C , and one expects nuclear effects to play a bigger role in reactions. We present inclusive differential and total cross section results for charged-current neutrino scattering on 40Ar and perform a comparison with 12C , 16O , and 56Fe targets, to find out about the A -dependent behavior of model predictions. Method: Our model starts off with a Hartree-Fock description of the nucleus, with the nucleons interacting through a mean field generated by an effective Skyrme force. Long-range correlations are introduced by means of a continuum random phase approximation approach. Further methods to improve the accuracy of model predictions are also incorporated in the calculations. Results: We present calculations for 12C , 16O , 40Ar , and 56Fe , showcasing differential cross sections over a broad range of kinematic values in the quasielastic regime. We furthermore show flux-folded results for 40Ar and we discuss the differences between nuclear responses. Conclusions: At low incoming energies and forward scattering we identify an enhancement in the 40Ar cross section compared to 12C , as well as in the high ω (low Tμ) region across the entire studied Eν range. The contribution to the folded cross section of the reaction strength at values of ω lower than 50 MeV for forward scattering is sizable.

Numerical analysis of flows of rarefied gases in long channels with octagonal cross section shapes

NASA Astrophysics Data System (ADS)

Szalmas, L.

2014-12-01

Isothermal, pressure driven rarefied gas flows through long channels with octagonal cross section shapes are analyzed computationally. The capillary is between inlet and outlet reservoirs. The cross section is constant along the axial direction. The boundary condition at the solid-gas interface is assumed to be diffuse reflection. Since the channel is long, the gaseous velocity is small compared to the average molecular speed. Consequently, a linearized description can be used. The flow is described by the linearized Bhatnagar-Gross-Krook kinetic model. The solution of the problem is divided into two stages. First, the local flow field is determined by assuming the local pressure gradient. Secondly, the global flow behavior is deduced by the consideration of the conservation of the mass along the axis of the capillary. The kinetic equation is solved by the discrete velocity method on the cross section. Both spatial and velocity spaces are discretized. A body fitted rectangular grid is used for the spatial space. Near the boundary, first-order, while in the interior part of the flow domain, second-order finite-differences are applied to approximate the spatial derivatives. This combination results into an efficient and straightforward numerical treatment. The velocity space is represented by a Gauss-Legendre quadrature. The kinetic equation is solved in an iterative manner. The local dimensionless flow rate is calculated and tabulated for a wide range of the gaseous rarefaction for octagonal cross sections with various geometrical parameters. It exhibits the Knudsen minimum phenomenon. The flow rates in the octagonal channel are compared to those through capillaries with circular and square cross sections. Typical velocity profiles are also shown. The mass flow rate and the distribution of the pressure are determined and presented for global pressure driven flows.

An evaluation of fruit and vegetable consumption and cigarette smoking among youth.

PubMed

Haibach, Jeffrey P; Homish, Gregory G; Collins, R Lorraine; Ambrosone, Christine B; Giovino, Gary A

2015-06-01

Research across the past 4 decades has supported a cross-sectional association between adult cigarette smoking and lower fruit and vegetable consumption (FVC), and emerging research suggests higher FVC may predict cessation. Among youth, findings are limited to a few cross-sectional studies with somewhat mixed results. Here we evaluated the FVC-smoking association among youth both cross-sectionally and longitudinally. We analyzed data from a subsample of the National Longitudinal Survey of Youth 1979: Child and Young Adult. The subsample included adolescents aged 14-18 years at baseline in the year 2004. Multivariable cross-sectional analyses assessed whether baseline FVC was associated with smoking frequency among ever-smokers (n = 578). Longitudinally, the study assessed whether baseline FVC predicted smoking progression among baseline never-smokers who tried a cigarette by 4-year follow-up (n = 388). Multivariable regression models adjusted for age, gender, race/ethnicity, parental education, and health behavior orientation. Cross-sectionally, youth who consumed fruit ≥2 times per day were 53% less likely (RR = 0.47; p < .05) than those who typically did not consume fruit to be in a higher smoking frequency category. Longitudinally, the fruit consumption and smoking association was not significant (RR = 0.61; p = .282). There were no significant associations observed between vegetable consumption and smoking. Fruit consumption, but not vegetable consumption, was inversely associated with smoking frequency cross-sectionally but not longitudinally. Further research is needed to provide information on the consistency of the FVC-smoking relationship among youth and may help to elucidate possible explanatory mechanisms. © The Author 2014. Published by Oxford University Press on behalf of the Society for Research on Nicotine and Tobacco. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Risky online behaviors among adolescents: Longitudinal relations among problematic Internet use, cyberbullying perpetration, and meeting strangers online

PubMed Central

Gámez-Guadix, Manuel; Borrajo, Erika; Almendros, Carmen

2016-01-01

Background and aims This study aims to analyze the cross-sectional and longitudinal relationship between three major risky online behaviors during adolescence: problematic Internet use, cyberbullying perpetration, and meeting strangers online. An additional objective was to study the role of impulsivity–irresponsibility as a possible explanatory variable of the relationships between these risky online behaviors. Methods The study sample was 888 adolescents that completed self-report measures at time 1 and time 2 with an interval of 6 months. Results The findings showed a significant cross-sectional relationship between the risky online behaviors analyzed. At the longitudinal level, problematic Internet use at time 1 predicted an increase in the perpetration of cyberbullying and meeting strangers online at time 2. Furthermore, meeting strangers online increased the likelihood of cyberbullying perpetration at time 2. Finally, when impulsivity–irresponsibility was included in the model as an explanatory variable, the relationships previously found remained significant. Discussion These results extend traditional problem behavior theory during adolescence, also supporting a relationship between different risky behaviors in cyberspace. In addition, findings highlighted the role of problematic Internet use, which increased the chances of developing cyberbullying perpetration and meeting strangers online over time. However, the results suggest a limited role of impulsivity–irresponsibility as an explicative mechanism. Conclusions The findings suggest that various online risk activities ought to be addressed together when planning assessment, prevention and intervention efforts. PMID:28092196

Weight-related concerns and diet behaviors among urban young females: A cross-sectional study

PubMed Central

Omidvar, Shabnam; Amiri, Fatemeh Nasiri; Bakouei, Fatemeh; Begum, Khyrunnisa

2016-01-01

Background: Females are more likely than males to perceive themselves as too heavy, this has been explained in terms of the equation of “female beauty with extreme thinness.” Therefore, females are in general prone to develop unhealthy behaviors for weight management. Wrong weight control behaviors have significant health consequences. Objectives: To investigate the body weight concerns, body satisfaction, and weight control behaviors among young females and their association with age and socioeconomic status (SES). Materials and Methods: A cross-sectional study conducted in urban areas from a major city in South India. About 650 healthy unmarried females aged 15–25 years formed the study population. Self-reporting questionnaires were used to obtain relevant data. The categorical data were analyzed using Chi-square, correlation, and regression analyses by SPSS version 16. Results: Most overweight and obese subjects perceived themselves as overweight. Adolescents were more likely to report themselves as overweight. The perceived weight, body satisfaction, and weight control behaviors are influenced by weight status and age of the subjects. However, SES of the participants did not exhibit effect of others’ opinion about their weight and body satisfaction as well as weight management behaviors. Conclusion: The high prevalence of weight-related concerns suggests that all females should be reached with appropriate information and interventions. Healthy weight control practices need to be explicitly promoted and unhealthy practices discouraged. Young females need special attention toward weight management. PMID:27843836

Suicidal behaviors among Moroccan school students: prevalence and association with socio-demographic characteristics and psychoactive substances use: a cross-sectional study.

PubMed

Zarrouq, Btissame; Bendaou, B; Elkinany, S; Rammouz, I; Aalouane, R; Lyoussi, B; Khelafa, S; Bout, A; Berhili, N; Hlal, H; Nejjari, C; El Rhazi, K

2015-11-14

Suicidal behavior is a major cause of injury and death worldwide, especially among adolescents and young adults. Few studies have tackled this issue in the Arab world. The present study investigated the prevalence and the risk factors of suicidal behaviors among Moroccan school students. From April 2012 to November 2013, a cross-sectional study was conducted in the North-Centre region of Morocco among students in public secondary schools selected using stratified cluster random sampling. The data were collected via anonymous self-administered questionnaires. The Mini International Neuropsychiatric Interview was used in its Moroccan Colloquial Arabic version to assess suicidality according to the DSM-IV criteria. A total of 3020 students (53 % boys) aged 11-23 years (average age = 16 ± 2.1 years) were included in the study. The prevalence of suicide ideation, suicide planning and suicide attempts during the last month were 15.7, 6.3, and 6.5 % respectively. Univariate analyses demonstrated that suicidal behaviors followed different epidemiological patterns. According to the multivariate analyses, the risk factors for all suicidal behaviors among Moroccan school students were the female gender, middle school level, urban locations, low family income, parents' divorce, tobacco consumption and psychoactive substances (alcohol and cannabis) use. The intervention of preventive programs has become an emergency to overcome the issue of suicidality in Morocco. Further researches on adolescents' suicidal behaviors are suggested to update temporal data and assess the effectiveness of potential interventions.

Cross-sectional and prospective associations between sleep, screen time, active school travel, sports/exercise participation and physical activity in children and adolescents.

PubMed

Dalene, Knut Eirik; Anderssen, Sigmund A; Andersen, Lars Bo; Steene-Johannessen, Jostein; Ekelund, Ulf; Hansen, Bjørge H; Kolle, Elin

2018-06-07

The aim of this study was to investigate how sleep, screen time, active school travel and sport and/or exercise participation associates with moderate-to-vigorous physical activity (MVPA) in nationally representative samples of Norwegian 9- and 15-y-olds, and whether these four behaviors at age nine predict change in MVPA from age nine to 15 years. We pooled cross-sectional accelerometer and questionnaire data from 9- (n = 2366) and 15-y-olds (n = 1554) that participated in the first (2005/06) and second (2011/12) wave of the Physical Activity among Norwegian Children Study to investigate cross-sectional associations. To investigate prospective associations, we used data from a sub-sample that participated in both waves (at age nine and 15 years, n = 517). Cross-sectional analyses indicated a modest, inverse association between screen time and MVPA among 9- (- 2.2 min/d (95% CI: -3.1, - 1.3)) and 15-y-olds (- 1.7 min/d (95% CI: -2.7, - 0.8)). Compared to their peers with 0-5 min/d of active travel to school, 9- and 15-y-olds with ≥16 min/d accumulated 7.2 (95% CI: 4.0, 10.4) and 9.0 (95% CI: 3.8, 14.1) more min/d of MVPA, respectively. Nine-y-old boys and 15-y-olds reporting ≥8 h/week of sports and/or exercise participation accumulated 14.7 (95% CI: 8.2, 21.3) and 17.9 (95% CI: 14.0, 21.8) more min/d of MVPA, respectively, than those reporting ≤2 h/week. We found no cross-sectional association between sleep duration and MVPA in either age group. None of the four behaviors predicted change in MVPA from age nine to 15 years (p ≥ 0.102). Active travel to school and sport/exercise participation may be important targets for future interventions aimed at increasing MVPA in children and adolescents. However, future studies are needed to determine causality.

Change in the contractile behavior of muscle fibers in subjects with primary muscle dysfunction.

PubMed

Back, Claudio Gregório Nuernberg; Benedini-Elias, Priscila C O; Mattiello, Stela M; Sobreira, Claudia; Martinez, Edson Z; Mattiello-Sverzut, Ana Claudia

2013-01-01

The mechanical and metabolic characteristics of skeletal muscle fibers can interfere with muscle contractile performance in healthy subjects. Few studies have investigated the degree of association between muscle function and muscle fiber morphology in patients with myopathy. A biopsy was obtained from the left biceps brachii muscle of 12 subjects with myopathic disorders. The relative cross-sectional area of type 2 fibers and their subtypes was determined by the ATPase technique. Relative torque (RT) was calculated by dividing isokinetic elbow flexion peak torque (PT) values (90 and 180° s-1) by isometric PT values. Correlations were analyzed using Spearman's coefficient (r). The relative cross-sectional area of type 2b fibers was positively correlated with RT90 (r = 0.71, P = 0.009) and RT180 (r = 0.73, P = 0.007). The relative cross-sectional area of type 2a fibers showed a moderate and negative correlation with RT180 (r = -0.62, P = 0.03) and a low correlation with RT90 (r = -0.57, P = 0.05). In contrast to healthy subjects, patients with myopathy presented changes in the contractile behavior of type 2a fibers and compensatory adaptations in type 2b fibers. The results suggest that RT in combination with morphometric parameters provides data regarding muscle function in patients with myopathic disorders and can contribute to the establishment of therapeutic exercises.

Temporal scaling of the growth dependent optical properties of microalgae

NASA Astrophysics Data System (ADS)

Zhao, J. M.; Ma, C. Y.; Liu, L. H.

2018-07-01

The optical properties of microalgae are basic parameters for analyzing light field distribution in photobioreactors (PBRs). With the growth of microalgae cell, their optical properties will vary with growth time due to accumulation of pigment and lipid, cell division and metabolism. In this work, we report a temporal scaling behavior of the growth dependent optical properties of microalgae cell suspensions with both experimental and theoretical evidence presented. A new concept, the temporal scaling function (TSF), defined as the ratio of absorption or scattering cross-sections at growth phase to that at stationary phase, is introduced to characterize the temporal scaling behavior. The temporal evolution and temporal scaling characteristics of the absorption and scattering cross-sections of three example microalgae species, Chlorella vulgaris, Chlorella pyrenoidosa, and Chlorella protothecoides, were experimentally studied at spectral range 380-850 nm. It is shown that the TSFs of the absorption and scattering cross-sections for different microalgae species are approximately constant at different wavelength, which confirms theoretical predictions very well. With the aid of the temporal scaling relation, the optical properties at any growth time can be calculated based on those measured at stationary phase, hence opens a new way to determine the time-dependent optical properties of microalgae. The findings of this work will help the understanding of time dependent optical properties of microalgae and facilitate their applications in light field analysis in PBRs design.

Macroscopic strain controlled ion current in an elastomeric microchannel

DOE Office of Scientific and Technical Information (OSTI.GOV)

Kuo, Chin-Chang; Nguyen, Du; Buchsbaum, Steven

We report on the fabrication of an ultra-high aspect ratio ionically conductive single microchannel with tunable diameter from ≈ 20 μm to fully closed. The 4 mm-long channel is fabricated in a Polydimethylsiloxane (PDMS) mold and its cross-sectional area is controlled by applying macroscopic compressive strain to the mold in a direction perpendicular to the channel length. We investigated the ionic conduction properties of the channel. For a wide range of compressive strain up to ≈ 0.27, the strain dependence of the resistance is monotonic and fully reversible. For strain > 0.27, ionic conduction suddenly shuts off and the system becomes hystereticmore » (whereby a finite strain reduction is required to reopen the channel). Upon unloading, the original behavior is retrieved. This reversible behavior is observed over 200 compression cycles. The cross-sectional area of the channel can be inferred from the ion current measurement, as confirmed by a Nano-Computed Tomography investigation. We show that the cross-sectional area decreases monotonically with the applied compressive strain in the reversible range, in qualitative agreement with linear elasticity theory. We find that the shut-off strain is affected by the spatial extent of the applied strain, which provides additional tunability. Our tunable channel is well-suited for multiple applications in micro/nano-fluidic devices.« less

Premarital Predictors of Marital Quality and Stability.

ERIC Educational Resources Information Center

Larson, Jeffry H.; Holman, Thomas B.

1994-01-01

Reviews research on premarital factors associated with later marital quality and stability in first marriages. Three major categories of factors are described, including background and context, individual traits and behaviors, and couple interactional processes. Both cross-sectional and longitudinal research are summarized. Recommendations for…

Highway-railway at-grade crossing structures : long term settlement measurements and assessments.

DOT National Transportation Integrated Search

2016-03-22

A common maintenance technique to correct track geometry at bridge transitions is hand tamping. The first section presents a non-invasive track monitoring system involving high-speed video cameras that evaluates the change in track behavior before an...

Salt intake belief, knowledge, and behavior: a cross-sectional study of older rural Chinese adults.

PubMed

Zhang, Jing; Wu, Tao; Chu, Hongling; Feng, Xiangxian; Shi, Jingpu; Zhang, Ruijuan; Zhang, Yuhong; Zhang, Jianxin; Li, Nicole; Yan, Lijing; Niu, Wenyi; Wu, Yangfeng

2016-08-01

Excess sodium consumption is a major cause of high blood pressure and subsequent vascular disease. However, the factors driving people's salt intake behavior remains largely unknown. This study aims to assess the relationship of salt intake behaviors with knowledge and belief on salt and health among older adults in rural China.A cross-sectional survey was conducted among 4693 older participants (men ≥50 and women ≥60 years old) randomly selected from 120 rural villages in 5 northern provinces in China. Healthy salt intake behavior was defined as either not eating pickled foods or not adding pickles/soy sauce/salt when food was not salty enough in prior 3 months.There were 81% participants having healthy salt intake behavior. Healthy salt intake behavior was more common among women (P < 0.01) and was positively associated with age (P < 0.01) and poorer health status (P < 0.01), but negatively associated with years in school (P < 0.05). After adjusting for age, sex, years in school, and health status, participants who believed in the harm of high salt intake were more likely to have healthy salt intake behavior, compared with those who did not believe (Odds Ratio = 1.6, P < 0.001). Knowledge of salt intake was not significantly related to healthy salt intake behavior.Our study demonstrated that belief in the harm of high salt intake rather than knowledge about salt and health was associated with healthy salt intake behavior, independent of age, sex, years in school, and health status. Future population salt reduction programs should place more emphasis on establishing health beliefs rather than only delivering salt-related knowledge.Clinical trial registration number of the study is NCT01259700.

Health-related behaviors and technology usage among college students.

PubMed

Melton, Bridget F; Bigham, Lauren E; Bland, Helen W; Bird, Matthew; Fairman, Ciaran

2014-07-01

To examine associations between technology usage and specific health factors among college students. The research employed was a quantitative, descriptive, cross-sectional design; undergraduate students enrolled in spring 2012 general health education courses were recruited to participate. To explore college students' specific technology usage and health-related behaviors, a 28-item questionnaire was utilized. Statistical significant differences of technology usage were found between 3 of the 4 health-related behaviors under study (BMI, sleep, and nutrition) (p < .05). As technology usage continues to evolve within the college student population, health professionals need to understand its implications on health behaviors.

Moderating effect of nurses' customer-oriented perception between organizational citizenship behaviors and satisfaction.

PubMed

Chang, Ching Sheng; Chang, Hae Ching

2010-08-01

This study investigates whether organizational citizenship behaviors enhance job satisfaction among nursing personnel, while exploring whether customer-oriented perception has a moderating effect between nursing personnel's organizational citizenship behaviors and job satisfaction.The authors used a cross-sectional survey sent to 500 nurses with 232 valid responses. According to the research findings, nurses' organizational citizenship behaviors have a positive and significant influence on job satisfaction. Results also indicated that the moderating effect of nurses' customer-oriented perception on the relationship between their organizational citizenship behaviors and job satisfaction was stronger for high customer-oriented perception than it was low customer-oriented perception.

"Broken windows": Relationship between neighborhood conditions and behavioral health among low-income African American adolescents.

PubMed

Voisin, Dexter R; Kim, Dong Ha

2018-03-01

This study explored the association between neighborhood conditions and behavioral health among African American youth. Cross-sectional data were collected from 683 African American youth from low-income communities. Measures for demographics, neighborhood conditions (i.e. broken windows index), mental health, delinquency, substance use, and sexual risk behaviors were assessed. Major findings indicated that participants who reported poorer neighborhood conditions compared to those who lived in better living conditions were more likely to report higher rates of mental health problems, delinquency, substance use, and unsafe sexual behaviors. Environmental factors need to be considered when addressing the behavioral health of low-income African American youth.

Death Anxiety and Pain Catastrophizing Among Male Inmates With Nonsuicidal Self-Injury Behavior: A Comparative Study.

PubMed

Enea, Violeta; Dafinoiu, Ion; Bogdan, Georgiana; Matei, Carmen

2017-07-01

Most of the studies concerning nonsuicidal self-injury behaviors of persons deprived of liberty were on female participants. This cross-sectional comparative study compared the levels of death anxiety, pain catastrophizing, dissociative experiences, and state-trait anger among male inmates with nonsuicidal self-injury behaviors and noninjuring controls. The results indicated high levels of death anxiety, dissociation, and pain catastrophizing in both groups of participants and the absence of significant differences between the groups. The implications of the results suggest the need of taking into consideration these variables in the behavior management plans used with inmates who engage in self-injurious behavior.

HIV, syphilis, and behavioral risk factors among female sex workers before and after implementation of harm reduction programs in a high drug-using area of China.

PubMed

Zhang, Li; Liang, Shu; Lu, Weixia; Pan, Stephen W; Song, Benli; Liu, Qianping; Xu, Yunan; Dong, Hui; Xing, Hui; Shao, Yiming; Ruan, Yuhua

2014-01-01

To evaluate the impact of harm reduction programs on HIV and syphilis infection and related risk behaviors among female sex workers (FSWs) in a drug trafficking city in Southwest China. Before and after harm reduction program study. Two cross-sectional surveys were conducted among FSWs before and after harm reduction programs were launched in Xichang city, Sichuan province. The first and second cross-sectional surveys were conducted in 2004 and 2010, respectively. Temporal changes in odds of HIV, syphilis, and behavioral risk factors were assessed by multivariable logistic regression while controlling for socio-demographics. The 2004 and 2010 cross-sectional surveys recruited 343 and 404 FSWs, respectively. From 2004 to 2010, the odds of syphilis infection decreased by 35% and was of borderline statistical significance (AOR: 0.65, 95% CI: 0.41-1.03), while odds of HIV infection rose, but not significantly (AOR: 4.12, 95% CI: 0.76-22.45). Although odds of unprotected sex with primary sex partners did not significantly change over time (AOR: 0.96; 95% CI: 0.61-1.50), odds of unprotected sex with clients declined significantly and remarkably (AOR: 0.14, 95% CI: 0.09-0.21). Notably, the odds of reporting ≥10 new sex partners in the previous month increased by 37% (AOR: 1.37; 95% CI: 0.98-1.90). Harm reduction strategies may be an effective means of reducing unprotected sex with clients among FSWs. Future research is needed to better target both FSWs and IDUs and interrupt bridging networks for HIV transmission in high drug-using areas of China.

The effects of lane width, shoulder width, and road cross-sectional reallocation on drivers' behavioral adaptations.

PubMed

Mecheri, Sami; Rosey, Florence; Lobjois, Régis

2017-07-01

Previous research has shown that lane-width reduction makes drivers operate vehicles closer to the center of the road whereas hard-shoulder widening induces a position farther away from the road's center. The goal of the present driving-simulator study was twofold. First, it was aimed at further investigating the respective effects of lane and shoulder width on in-lane positioning strategies, by examining vehicle distance from the center of the lane. The second aim was to assess the impact on safety of three possible cross-sectional reallocations of the width of the road (i.e., three lane-width reductions with concomitant shoulder widening at a fixed cross-sectional width) as compared to a control road. The results confirmed that lane-width reduction made participants drive closer to the road's center. However, in-lane position was affected differently by lane narrowing, depending on the traffic situation. In the absence of oncoming traffic, lane narrowing gave rise to significant shifts in the car's distance from the lane's center toward the edge line, whereas this distance remained similar across lane widths during traffic periods. When the shoulders were at least 0.50m wide, participants drove farther away from both the road center and the lane center. Road reallocation operations resulted in vehicles positioned farther away from the edge of the road and less swerving behavior, without generating higher driving speeds. Finally, it is argued that road-space reallocation may serve as a good low-cost tool for providing a recovery area for steering errors, without impairing drivers' behavior. Copyright © 2017 Elsevier Ltd. All rights reserved.

[Influence of diet and behavior related factors on the peripheral blood triglyceride levels in adults: a cross-sectional study].

PubMed

Liang, M B; Wang, H; Zhang, J; He, Q F; Fang, L; Wang, L X; Su, D T; Zhao, M; Zhang, X W; Hu, R Y; Cong, L M; Ding, G G; Ye, Z; Yu, M

2017-12-10

Objective: To study the influence of diet and behavior related factors on the peripheral blood triglyceride levels in adults, through a cross-sectional survey. Methods: The current study included 13 434 subjects without histories of major chronic diseases from a population-based cross-sectional survey: the 2010 Metabolic Syndrome Survey in Zhejiang Province. A generalized linear model was used to investigate the influence of diet/behavior-related factors on the peripheral blood triglyceride levels. Results: Mean TG of the sample population appeared as (1.36±1.18) mmol/L. The proportions of elevated TG and marginally elevated TG were 10.3% and 11.0% respectively, with statistically significant difference seen between males and females ( χ (2)=44.135, P <0.001). In this sampled population, the daily intake of cooking oil was exceeding the recommendation levels by over 50% while the intake of fruit, milk, nuts and physical exercise were much below the recommendation. There were statistically significant differences between smoking, alcohol-intake, meat, fruit and water intake in male population from this study. However, in females, the intake of aquatic product and physical exercise showed statistically significant differences. After controlling for other variables, factors as age, drinking, staple food and aquatic products showed positive influence on TG, while milk presented negative influence on TG. Through interaction analysis, fruit and meat intake in males and staple food in females showed positive influence on TG, when compared to the reference group. Conclusion: Hyperglyceridemia appeared as one of the major metabolic abnormities in Zhejiang province. Programs on monitoring the alcohol, staple food and meat intake should be priority on intervention, in the communities.

Sleep problems outperform depression and hopelessness as cross-sectional and longitudinal predictors of suicidal ideation and behavior in young adults in the military.

PubMed

Ribeiro, Jessica D; Pease, James L; Gutierrez, Peter M; Silva, Caroline; Bernert, Rebecca A; Rudd, M David; Joiner, Thomas E

2012-02-01

Sleep problems appear to represent an underappreciated and important warning sign and risk factor for suicidal behaviors. Given past research indicating that disturbed sleep may confer such risk independent of depressed mood, in the present report we compared self-reported insomnia symptoms to several more traditional, well-established suicide risk factors: depression severity, hopelessness, PTSD diagnosis, as well as anxiety, drug abuse, and alcohol abuse symptoms. Using multiple regression, we examined the cross-sectional and longitudinal relationships between insomnia symptoms and suicidal ideation and behavior, controlling for depressive symptom severity, hopelessness, PTSD diagnosis, anxiety symptoms, and drug and alcohol abuse symptoms in a sample of military personnel (N=311). In support of a priori hypotheses, self-reported insomnia symptoms were cross-sectionally associated with suicidal ideation, even after accounting for symptoms of depression, hopelessness, PTSD diagnosis, anxiety symptoms and drug and alcohol abuse. Self-reported insomnia symptoms also predicted suicide attempts prospectively at one-month follow up at the level of a non-significant trend, when controlling for baseline self-reported insomnia symptoms, depression, hopelessness, PTSD diagnosis and anxiety, drug and alcohol abuse symptoms. Insomnia symptoms were unique predictors of suicide attempt longitudinally when only baseline self-reported insomnia symptoms, depressive symptoms and hopelessness were controlled. The assessment of insomnia symptoms consisted of only three self-report items. Findings may not generalize outside of populations at severe suicide risk. These findings suggest that insomnia symptoms may be an important target for suicide risk assessment and the treatment development of interventions to prevent suicide. Copyright © 2011 Elsevier B.V. All rights reserved.

Scaling Deviations for Neutrino Reactions in Aysmptotically Free Field Theories

DOE R&D Accomplishments Database

Wilczek, F. A.; Zee, A.; Treiman, S. B.

1974-11-01

Several aspects of deep inelastic neutrino scattering are discussed in the framework of asymptotically free field theories. We first consider the growth behavior of the total cross sections at large energies. Because of the deviations from strict scaling which are characteristic of such theories the growth need not be linear. However, upper and lower bounds are established which rather closely bracket a linear growth. We next consider in more detail the expected pattern of scaling deviation for the structure functions and, correspondingly, for the differential cross sections. The analysis here is based on certain speculative assumptions. The focus is on qualitative effects of scaling breakdown as they may show up in the X and y distributions. The last section of the paper deals with deviations from the Callan-Gross relation.

The interpersonal theory of suicide and adolescent suicidal behavior.

PubMed

Barzilay, S; Feldman, D; Snir, A; Apter, A; Carli, V; Hoven, C W; Wasserman, C; Sarchiapone, M; Wasserman, D

2015-09-01

Joiner's interpersonal theory of suicide (IPTS) proposes that suicide results from the combination of a perception of burdening others, social alienation, and the capability for self-harm. The theory gained some empirical support, however the overall model has yet to be tested. This study aimed to test the main predictions of IPTS in a large community sample of Israeli adolescents. 1196 Israeli Jewish and Arab high-school pupils participating in the SEYLE project completed a self-report questionnaire measuring perceived burdensomeness, thwarted belongingness, health risk behaviors, and non-suicidal self-injury (risk variables), and suicidal ideation and suicide attempts (outcome measures). The data were tested in cross-sectional regression models. Consistent with IPTS, perceived burdensomeness was found to interact with thwarted belongingness, predicting suicidal ideation. Depression mediated most of the effect of thwarted belongingness and perceived burdensomeness on suicidal ideation. Acquired capability for self-harm, as measured by health risk behaviors and direct non-suicidal self-injurious behaviors, predicted suicide attempt. However, this mechanism operated independently from ideation rather than in interaction with it, at variance with IPTS-based predictions. The cross-sectional design precludes conclusions about causality and directionality. Proxy measures were used to test the interpersonal theory constructs. The findings support some of the IPTS predictions but not all, and imply two separate pathways for suicidal behavior in adolescents: one related to internalizing psychopathology and the other to self-harm behaviors. This conceptualization has clinical implications for the differential identification of adolescents at risk for suicidal behavior and for the development of prevention strategies. Copyright © 2015 Elsevier B.V. All rights reserved.

Factors relating to adolescent suicidal behavior: a cross-sectional Malaysian school survey.

PubMed

Chen, Paul C Y; Lee, Lai Kah; Wong, Kam Cheong; Kaur, Jagmohni

2005-10-01

This study was undertaken to examine factors relating to adolescent suicide behavior. This was a cross-sectional school survey of 4,500 adolescent students based on a structured questionnaire. Data were collected using the supervised self-administered questionnaire (modified version of the Youth Risk Behavior Surveillance in the Malaysian National Language, Bahasa Malaysia). Seven percent (312 of 4,454) of the adolescent students had seriously considered attempting suicide. Among the adolescents, 4.6% had attempted suicide at least once during the 12 months preceding the survey. Female adolescents were more likely to put their suicidal thoughts into suicidal action than were male adolescents. Malay and Indian people are more likely than the Chinese to respond, "Felt sad and hopeless." However, Malay adolescents had the lowest rate of attempted suicide. Based on multiple logistic regression, factors significantly related to urban adolescents' suicide behavior are "Felt sad or hopeless," "Number of days felt unsafe to go to school," "Riding with a driver who had been drinking alcohol," "Physical fight," and "Number of days absent from school." In comparison, factors relating to rural adolescents' suicide behavior are "Felt sad or hopeless," "Physical fight," "Physical fight resulting in injury," and "Drive a vehicle after drinking alcohol." Adolescent suicide behavior should be viewed as a serious problem. Measures can be taken to prevent suicide by looking at the factors significantly linked to suicidal behavior among adolescents. Steps can then be taken to identify adolescents who have serious suicidal ideation so that intervention can be taken to reduce the suicidal rate.

The prevalence and correlates of severe social withdrawal (hikikomori) in Hong Kong: A cross-sectional telephone-based survey study.

PubMed

Wong, Paul W C; Li, Tim M H; Chan, Melissa; Law, Y W; Chau, Michael; Cheng, Cecilia; Fu, K W; Bacon-Shone, John; Yip, Paul S F

2015-06-01

Severe social withdrawal behaviors among young people have been a subject of public and clinical concerns. This study aimed to explore the prevalence of social withdrawal behaviors among young people aged 12-29 years in Hong Kong. A cross-sectional telephone-based survey was conducted with 1,010 young individuals. Social withdrawal behaviors were measured with the proposed research diagnostic criteria for hikikomori and were categorized according to the (a) international proposed duration criterion (more than 6 months), (b) local proposed criterion (less than 6 months) and (c) with withdrawal behaviors but self-perceived as non-problematic. The correlates of social withdrawal among the three groups were examined using multinomial and ordinal logistic regression analyses. The prevalence rates of more than 6 months, less than 6 months and self-perceived non-problematic social withdrawal were 1.9%, 2.5% and 2.6%, respectively. In terms of the correlates, the internationally and locally defined socially withdrawn youths are similar, while the self-perceived non-problematic group is comparable to the comparison group. The study finds that the prevalence of severe social withdrawal in Hong Kong is comparable to that in Japan. Both groups with withdrawal behaviors for more or less than 6 months share similar characteristics and are related to other contemporary youth issues, for example, compensated dating and self-injury behavior. The self-perceived non-problematic group appears to be a distinct group and the withdrawal behaviors of its members may be discretionary. © The Author(s) 2014.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Ren, X.; Senftleben, A.; Pflueger, T.

Absolutely normalized (e,2e) measurements for H{sub 2} and He covering the full solid angle of one ejected electron are presented for 16 eV sum energy of both final state continuum electrons. For both targets rich cross-section structures in addition to the binary and recoil lobes are identified and studied as a function of the fixed electron's emission angle and the energy sharing among both electrons. For H{sub 2} their behavior is consistent with multiple scattering of the projectile as discussed before [Al-Hagan et al., Nature Phys. 5, 59 (2009)]. For He the binary and recoil lobes are significantly larger thanmore » for H{sub 2} and partly cover the multiple scattering structures. To highlight these patterns we propose a alternative representation of the triply differential cross section. Nonperturbative calculations are in good agreement with the He results and show discrepancies for H{sub 2} in the recoil peak region. For H{sub 2} a perturbative approach reasonably reproduces the cross-section shape but deviates in absolute magnitude.« less

Heavy ion fragmentation experiments at the bevatron

NASA Technical Reports Server (NTRS)

Heckman, H. H.

1976-01-01

Collaborative research efforts to study the fragmentation processes of heavy nuclei in matter using heavy ion beams of the Bevatron/Bevalac are described. The goal of the program is to obtain the single particle inclusive spectra of secondary nuclei produced at 0 deg by the fragmentation of heavy ion beam projectiles. The process being examined is B+T yields F + anything, where B is the beam nucleus, T is the target nucleus, and F is the detected fragment. The fragments F are isotopically identified by experimental procedures involving magnetic analysis, energy loss and time-of-flight measurements. Effects were also made to: (a) study processes of heavy nuclei in matter, (b) measure the total and partial production cross section for all isotopes, (c) test the applicability of high energy multiparticle interaction theory to nuclear fragmentation, (d) apply the cross section data and fragmentation probabilities to cosmic ray transport theory, and (e) search for systematic behavior of fragment production as a means to improve existing semi-empirical theories of cross-sections.

Collision cross sections and diffusion parameters for H and D in atomic oxygen. [in upper earth and Venus atmospheres

NASA Technical Reports Server (NTRS)

Hodges, R. R., Jr.

1993-01-01

Modeling the behavior of H and D in planetary exospheres requires detailed knowledge of the differential scattering cross sections for all of the important neutral-neutral and ion-neutral collision processes affecting these species over their entire ranges of interaction energies. In the upper atmospheres of Earth, Venus, and other planets as well, the interactions of H and D with atomic oxygen determine the rates of diffusion of escaping hydrogen isotopes through the thermosphere, the velocity distributions of exospheric atoms that encounter the upper thermosphere, the lifetimes of exospheric orbiters with periapsides near the exobase, and the transfer of momentum in collisions with hot O. The nature of H-O and D-O collisions and the derivation of a data base consisting of phase shifts and the differential, total, and momentum transfer cross sections for these interactions in the energy range 0.001 - 10 eV are discussed. Coefficients of mutual diffusion and thermal diffusion factors are calculated for temperatures of planetary interest.

Convergent close-coupling calculations of positron-magnesium scattering

DOE Office of Scientific and Technical Information (OSTI.GOV)

Savage, Jeremy S.; Fursa, Dmitry V.; Bray, Igor

2011-06-15

The single-center convergent close-coupling method has been applied to positron-magnesium scattering at incident energies from 0.01 to 100 eV. Cross sections are presented for elastic scattering and excitation of 3 {sup 1}P, as well as for the total ionization and total scattering processes. We also provide an estimate of the positronium formation cross section. The results agree very well with the measurements of the total cross section by Stein et al. [Nucl. Instrum. Methods Phys. Res. Sect. B 143, 68 (1998)], and consistent with the positronium formation measurements of Surdutovich et al. [Phys. Rev. A 68, 022709 (2003)] for positronmore » energies above the ionization threshold. For energies below the positronium formation threshold (0.8 eV) we find a large P-wave resonance at 0.17 eV. A similar resonance behavior was found by Mitroy and Bromley [Phys. Rev. Lett. 98, 173001 (2007)] at an energy of 0.1 eV.« less

Oscillations above the barrier in the fusion of 28Si + 28Si

DOE PAGES

Montagnoli, G.; Stefanini, A.M.; Esbensen, H.; ...

2015-05-13

Fusion cross sections of 28Si+ 28Si have been measured in a range above the barrier with a very small energy step (Delta E lab=0.5 MeV). Regular oscillations have been observed, best evidenced in the first derivative of the energy-weighted excitation function. For the first time, quite different behaviors (the appearance of oscillations and the trend of sub-barrier cross sections) have been reproduced within the same theoretical frame, i.e., the coupled-channel model using the shallow M3Y+repulsion potential. The calculations suggest that channel couplings play an important role in the appearance of the oscillations, and that the simple relation between a peakmore » in the derivative of the energy-weighted cross section and the height of a centrifugal barrier is lost, and so is the interpretation of the second derivative of the excitation function as a barrier distribution for this system, at energies above the Coulomb barrier.« less

Time-resolved flowmetering of gas-liquid two-phase pipe flow by ultrasound pulse Doppler method

NASA Astrophysics Data System (ADS)

Murai, Yuichi; Tasaka, Yuji; Takeda, Yasushi

2012-03-01

Ultrasound pulse Doppler method is applied for componential volumetric flow rate measurement in multiphase pipe flow consisted of gas and liquid phases. The flowmetering is realized with integration of measured velocity profile over the cross section of the pipe within liquid phase. Spatio-temporal position of interface is detected also with the same ultrasound pulse, which further gives cross sectional void fraction. A series of experimental demonstration was shown by applying this principle of measurement to air-water two-phase flow in a horizontal tube of 40 mm in diameter, of which void fraction ranges from 0 to 90% at superficial velocity from 0 to 15 m/s. The measurement accuracy is verified with a volumetric type flowmeter. We also analyze the accuracy of area integration of liquid velocity distribution for many different patterns of ultrasound measurement lines assigned on the cross section of the tube. The present method is also identified to be pulsation sensor of flow rate that fluctuates with complex gas-liquid interface behavior.

Applying the Problem Behavior Theory to Adolescent Drug Use Among a Cross-Sectional Sample of Boys Participating in a Community-Based Youth Organization.

PubMed

Alexander, Adam C; Obong'o, Christopher O; Chavan, Prachi; Vander Weg, Mark W; Ward, Kenneth D

2018-03-21

Drug use remains an important public health concern in the United States, and understanding drug use among young adolescents is vital towards improving the health of the population. This study applied the Problem Behavior Theory (PBT) to lifetime drug use among a cross-sectional sample of Boy Scouts (N = 770). The PBT provides a conceptual framework for identifying risk and protective factors for adolescent problem behaviors, including drug use. Scouts reported their drug use and socio-demographics, and were assessed on several risk and protective factors. For analyses, sociodemographic and risk and protective factors were selected according to the framework provided by PBT, and use of each drug was regressed logistically on these selected factors. Final logistic models were assessed for goodness of fit and discriminatory power. The PBT demonstrated discriminatory power for all drugs (Tjur's R 2 values ≥.29), but fell sharply for illicit drug use (Tjur's R 2 =.20). There were no consistent correlates of drug use. Conclusions/Importance: The PBT had less explanatory power for illicit drug use compared to tobacco, alcohol, and marijuana, which suggests different risk and protective factors were associated with illicit drug use.

Needle and syringe sharing practices of injecting drug users participating in an outreach HIV prevention program in Tehran, Iran: A cross-sectional study

PubMed Central

Vazirian, Mohsen; Nassirimanesh, Bijan; Zamani, Saman; Ono-Kihara, Masako; Kihara, Masahiro; Mortazavi Ravari, Shahrzad; Gouya, Mohammad Mehdi

2005-01-01

HIV infection rates have reached epidemic proportions amongst injecting drug users (IDUs) in Iran. Although a number of community-based interventions have being implemented in the country, there is little information on the risk behaviors of IDU participants in these programs. This cross-sectional report aimed to compare the risk behaviors of injecting drug users with differential exposure rates to an HIV outreach program in Tehran, Iran. Results indicated that shared use of needle/syringe in the past month was significantly lower among IDUs who received estimated ≥ 7 syringes per week than those who did not [adjusted odds ratio (OR) = 14.36, 95% confidence interval (CI) 2.30–89.56]. While the effectiveness of this outreach program needs further evaluation through a longitudinal investigation, our preliminary findings suggest that the outreach program in Tehran may have been beneficial in reducing direct sharing among those who received more than several needles/syringes from the program. PMID:16212655

Duality symmetry and power-law fading of frustration in a quantum multiconnected superconductor

DOE Office of Scientific and Technical Information (OSTI.GOV)

Sun, S.N.; Ralston, J.P.

1991-03-01

We generalize the Alexander--de Gennes equations to a new system of superconducting-wire networks, allowing for variation of the cross-sectional area of wires. The generalized equations are solved for a square lattice of different cross-sectional-area ratios {lambda} in the {ital x} and {ital y} directions. A symmetry of {lambda}{r arrow}1/{lambda} is related to the Aubry-Andre duality and an obvious geometric property. We find that even a slight geometric asymmetry can soften the fine structure of the magnetic phase boundary considerably. We obtain a power-law dependence on the parameter {lambda} as {lambda}{r arrow}{infinity} and {lambda}{r arrow}0. For a finite-area ratio {lambda}, wemore » speculate that a simple analytic fit incorporating the dual symmetry is close to the exact nonperturbative behavior. The system is also related analytically to a recent study of Hu and Chen, which revealed a power-law behavior for a rectangular lattice.« less

[Social-emotional and cognitive markers in children of divorce and in children from 2-parent families--a cross sectional study].

PubMed

Kardas, J; Langenmayr, A

1999-04-01

Related to the research of the effects of separation and divorce on children there is a lack of empirical studies in Germany. The following cross-sectional field-study directly investigate 48 children from divorced and 32 children from two-parent-families regarding socio-emotional and some cognitive characteristics (nonclinical samples). Projective and semi-projective tests were the preferred instruments. One of the main questions was related to frustration behavior, measured by the Rosenzweig-Picture-Frustration Test (childrens form). This test was used for the first time by a population of German children of divorce. Children of divorce showed a special frustration behavior, a so called M-profile showing many impunitive reactions. They avoid direct conflicts or struggle and try to deny the frustration. Also the subtests of the Hamburg-Wechsler-Intelligence test for children (HAWIK) show clearly that children from divorced families obtain much poorer test values in contrast to children from two-parent homes.

Electron attachment in F2 - Conclusive demonstration of nonresonant, s-wave coupling in the limit of zero electron energy

NASA Technical Reports Server (NTRS)

Chutjian, A.; Alajajian, S. H.

1987-01-01

Dissociative electron attachment to F2 has been observed in the energy range 0-140 meV, at a resolution of 6 meV (full width at half maximum). Results show conclusively a sharp, resolution-limited threshold behavior consistent with an s-wave cross section varying as sq rt of epsilon. Two accurate theoretical calculations predict only p-wave behavior varying as the sq rt of epsilon. Several nonadiabatic coupling effects leading to s-wave behavior are outlined.

Comparison of healthy lifestyle behaviors among individuals with and without cardiovascular diseases from urban and rural areas in China: A cross-sectional study.

PubMed

Wang, Chuangshi; Li, Wei; Yin, Lu; Bo, Jian; Peng, Yaguang; Wang, Yang

2017-01-01

The study aimed to explore the gap of prevalence of healthy lifestyle behaviors including smoking cessation, quitting drinking, physical activity and healthy eating between Chinese adults with and without cardiovascular diseases (CVDs). This study is a cross-sectional component of Prospective Urban Rural Epidemiology (PURE)-China study, which recruited ~46,000 participants from 70 rural and 45 urban communities between 2005 and 2009. Participants were divided into disease (with CVDs) and control (without any diseases) groups. The adjusted rates were estimated for different strata by the generalized, linear mixed-effects model, including community as a random effect with additional adjustment for age, sex, education and income. Among 40,490 participants, <10% had all four healthy lifestyle behaviors (disease group versus control group: urban areas: 7.8% versus 8.1%; rural areas: 3.4% versus 3.2%). The rates of smoking cessation and quitting drinking were significantly higher in disease group for both urban and rural residents (P<0.001). In urban areas, higher rates were observed in all other three healthy lifestyle behaviors except physical activity in low-income regions (P<0.05). Similarly, the higher trends were observed for stopping smoking and drinking while opposite trends for healthy eating among rural residents from low-income regions (P<0.05). Our study showed that the prevalence of adopting all four behaviors was low among Chinese adults. Individuals with CVDs were more likely to follow healthy lifestyle behaviors, but it still indicated a large gap between the actual and ideal adoption of healthy lifestyle behaviors, which called for the promotion of population-wide strategies to modify lifestyle behaviors in addition to individual health-care intervention strategies.

Prevalence of factors related to active reproductive health behavior: a cross-sectional study Indonesian adolescent.

PubMed

Susanto, Tantut; Rahmawati, Iis; Wuryaningsih, Emi Wuri; Saito, Ruka; Syahrul; Kimura, Rumiko; Tsuda, Akiko; Tabuchi, Noriko; Sugama, Junko

2016-01-01

Complex and diverse factors are related to reproductive health (RH) behavior among adolescents according to the social and cultural context of each countries. This study examined the prevalence of active RH and factors related to active RH behavior among Indonesian adolescents. A cross-sectional study was conducted among 1,040 of students who were selected through a multi-stage random sampling technique. A self-administered questionnaire was developed, including the World Health Organization Illustrative Questionnaire for Interview-Surveys with Young People, pubertal development scale, and sexual activity scale, modified in accordance to the Indonesian context. The data were analyzed using descriptive and comparative statistics, as well as logistic regression analyses. The prevalence of active RH behavior were more higher in boys (56.6%; 95% confidence interval [CI], 50.6% to 62.6%) than in girls (43.7%; 95% CI, 37.6% to 49.8%). Negative attitudes towards RH were a factor related to active RH behavior in both boys and girls. Smoking and kind relationship envisioned before marriage ( pacaran [courtship] and nikah siri [non-registered marriage]) were factors related to active RH behavior in boys; whereas the absence of access to information on substance abuse was an additional factor in girls. Moreover, an interaction was found between access to information on development and smoking (boys) and attitudes on RH (girls) as independent variables associated with active RH behavior. Sex education for adolescents in Indonesia, particularly in the context of a health promotion program, should be developed based on prevalent social, cultural, and religious values to prevent active RH behavior. Such programs should focus on the kind of relationship envisioned before marriage and smoking for boys and access to information on subtance abuse for girls.

Comparison of healthy lifestyle behaviors among individuals with and without cardiovascular diseases from urban and rural areas in China: A cross-sectional study

PubMed Central

Wang, Chuangshi; Yin, Lu; Bo, Jian; Peng, Yaguang; Wang, Yang

2017-01-01

Introduction The study aimed to explore the gap of prevalence of healthy lifestyle behaviors including smoking cessation, quitting drinking, physical activity and healthy eating between Chinese adults with and without cardiovascular diseases (CVDs). Methods This study is a cross-sectional component of Prospective Urban Rural Epidemiology (PURE)-China study, which recruited ~46,000 participants from 70 rural and 45 urban communities between 2005 and 2009. Participants were divided into disease (with CVDs) and control (without any diseases) groups. The adjusted rates were estimated for different strata by the generalized, linear mixed-effects model, including community as a random effect with additional adjustment for age, sex, education and income. Results Among 40,490 participants, <10% had all four healthy lifestyle behaviors (disease group versus control group: urban areas: 7.8% versus 8.1%; rural areas: 3.4% versus 3.2%). The rates of smoking cessation and quitting drinking were significantly higher in disease group for both urban and rural residents (P<0.001). In urban areas, higher rates were observed in all other three healthy lifestyle behaviors except physical activity in low-income regions (P<0.05). Similarly, the higher trends were observed for stopping smoking and drinking while opposite trends for healthy eating among rural residents from low-income regions (P<0.05). Conclusions Our study showed that the prevalence of adopting all four behaviors was low among Chinese adults. Individuals with CVDs were more likely to follow healthy lifestyle behaviors, but it still indicated a large gap between the actual and ideal adoption of healthy lifestyle behaviors, which called for the promotion of population-wide strategies to modify lifestyle behaviors in addition to individual health-care intervention strategies. PMID:28771516

A cross-sectional study on self-management of pressure ulcer prevention in paraplegic patients.

PubMed

de Laat, H E W; de Munter, A C; van der Burg, M J; Ulrich, D J O; Kloeters, O

2017-02-01

Little is known about health activation and self-management behavior in preventing pressure ulcers (PU) in paraplegic patients. Therefore this study aimed to describe the extent of health activation and self-management behavior in paraplegics to prevent PU's and associations between this behavior and patient characteristics. Furthermore, we aimed to find differences in health activation in paraplegics who never had a PU compared to paraplegics with a previous history of PU's or a new-onset PU's. A cross-sectional survey on health activation and self-management behavior was conducted among adult paraplegics recruited from two rehabilitation centers in the Netherlands. The Patient Activation Measure (PAM-score) was used to measure the extent of health activation. Patient statements on their level of self management behavior to prevent PU were evaluated. The mean PAM-score (0-100) was 54 (±8.1; n = 162) indicating a low level of health activation. Two indicators turned out to be statistically significant associated with health activation: level of education (OR = 2.2, p = 0.017) and degree of paraplegia (OR = 2.8, p = 0.036). Evaluation of health activation levels amongst paraplegics with or without a PU- history showed no significant difference. Analysis of patients statements demonstrated a large discrepancy between intended and actual behavior to prevent pressure ulcers. Level of education and level of paraplegia are significantly associated with health activation. A positive PU-history is not associated with future responsible behavior nor for compliant behavior in terms of health management. Copyright © 2016 Tissue Viability Society. Published by Elsevier Ltd. All rights reserved.

Prevalence of factors related to active reproductive health behavior: a cross-sectional study Indonesian adolescent

PubMed Central

Kimura, Rumiko; Tsuda, Akiko; Tabuchi, Noriko

2016-01-01

OBJECTIVES Complex and diverse factors are related to reproductive health (RH) behavior among adolescents according to the social and cultural context of each countries. This study examined the prevalence of active RH and factors related to active RH behavior among Indonesian adolescents. METHODS A cross-sectional study was conducted among 1,040 of students who were selected through a multi-stage random sampling technique. A self-administered questionnaire was developed, including the World Health Organization Illustrative Questionnaire for Interview-Surveys with Young People, pubertal development scale, and sexual activity scale, modified in accordance to the Indonesian context. The data were analyzed using descriptive and comparative statistics, as well as logistic regression analyses. RESULTS The prevalence of active RH behavior were more higher in boys (56.6%; 95% confidence interval [CI], 50.6% to 62.6%) than in girls (43.7%; 95% CI, 37.6% to 49.8%). Negative attitudes towards RH were a factor related to active RH behavior in both boys and girls. Smoking and kind relationship envisioned before marriage (pacaran [courtship] and nikah siri [non-registered marriage]) were factors related to active RH behavior in boys; whereas the absence of access to information on substance abuse was an additional factor in girls. Moreover, an interaction was found between access to information on development and smoking (boys) and attitudes on RH (girls) as independent variables associated with active RH behavior. CONCLUSIONS Sex education for adolescents in Indonesia, particularly in the context of a health promotion program, should be developed based on prevalent social, cultural, and religious values to prevent active RH behavior. Such programs should focus on the kind of relationship envisioned before marriage and smoking for boys and access to information on subtance abuse for girls. PMID:27866406

Understanding Air Force members' intentions to participate in pro-environmental behaviors: an application of the theory of planned behavior.

PubMed

Laudenslager, Mark S; Lofgren, Steven T; Holt, Daniel T

2004-06-01

At a single installation, a cross section of 307 active duty Air Force members completed questionnaires to assess whether the theory of planned behavior was useful in explaining the service members' intentions to participate in three environmentally protective behaviors-recycling, carpooling, and energy conservation. While the individual tenets of the theory of planned behavior, i.e., attitude toward the behavior, subjective norms, and perceived control, accounted for differing amounts of variance in intentions, the results indicated that the intentions of these Air Force members to recycle, conserve energy, and carpool were moderately explained by the tenets of the theory of planned behavior collectively when the results of a multiple regression were analyzed.

Cross-cultural validity of the theory of planned behavior for predicting healthy food choice in secondary school students of Inner Mongolia.

PubMed

Shimazaki, Takashi; Bao, Hugejiletu; Deli, Geer; Uechi, Hiroaki; Lee, Ying-Hua; Miura, Kayo; Takenaka, Koji

2017-11-01

Unhealthy eating behavior is a serious health concern among secondary school students in Inner Mongolia. To predict their healthy food choices and devise methods of correcting unhealthy choices, we sought to confirm the cross-cultural validity of the theory of planned behavior among Inner Mongolian students. A cross-sectional study, conducted between November and December 2014. Overall, 3047 students were enrolled. We devised a questionnaire based on the theory of planned behavior to measure its components (intentions, attitudes, subjective norms, and perceived behavioral control) in relation to healthy food choices; we also assessed their current engagement in healthy food choices. A principal component analysis revealed high contribution rates for the components (69.32%-88.77%). A confirmatory factor analysis indicated that the components of the questionnaire had adequate model fit (goodness of fit index=0.997, adjusted goodness of fit index=0.984, comparative fit index=0.998, and root mean square error of approximation=0.049). Notably, data from participants within the suburbs did not support the theory of planned behavior construction. Several paths did not predict the hypothesis variables. However, attitudes toward healthy food choices strongly predicted behavioral intention (path coefficients 0.49-0.77, p<0.01), regardless of demographic characteristics. Our results support that the theory of planned behavior can apply to secondary school students in urban areas. Furthermore, attitudes towards healthy food choices were the best predictor of behavioral intentions to engage in such choices in Inner Mongolian students. Copyright © 2017 Diabetes India. Published by Elsevier Ltd. All rights reserved.

Shear-horizontal vibration modes of an oblate elliptical cylinder and energy trapping in contoured acoustic wave resonators.

PubMed

He, Huijing; Yang, Jiashi; Kosinski, John A

2012-08-01

We study shear-horizontal free vibrations of an elastic cylinder with an oblate elliptical cross section and a traction-free surface. Exact vibration modes and frequencies are obtained. The results show the existence of thickness-shear and thickness-twist modes. The energy-trapping behavior of these modes is examined. Trapped modes are found wherein the vibration energy is largely confined to the central portion of the cross section and little vibration energy is found at the edges. It is also shown that face-shear modes are not allowed in such a cylinder. The results are useful for the understanding of the energy trapping phenomenon in contoured acoustic wave resonators.

Parent-child interactions and objectively measured child physical activity: a cross-sectional study

USDA-ARS?s Scientific Manuscript database

Parents influence their children's behaviors directly through specific parenting practices and indirectly through their parenting style. Some practices such as logistical and emotional support have been shown to be positively associated with child physical activity (PA) levels, while for others (e.g...

Community Violence Exposure and Children's Academic Functioning.

ERIC Educational Resources Information Center

Schwartz, David; Gorman, Andrea Hopmeyer

2003-01-01

Reports a cross-sectional investigation of the link between community violence exposure and academic difficulties for 237 urban elementary school children. Analyses indicated that community violence exposure was associated with poor academic performance. These relations appear to be mediated by symptoms of depression and disruptive behavior.…

Predicting use of ineffective vegetable parenting practices with the Model of Goal Directed Behavior

USDA-ARS?s Scientific Manuscript database

Increasing a parent's ability to influence a child's vegetable intake may require reducing the parent's use of ineffective vegetable parenting practices. This study assessed the psychosocial influences on ineffective vegetable parenting practices. A cross-sectional web-based survey was conducted to ...

Medications Do Not Necessarily Normalize Cognition in ADHD Patients

ERIC Educational Resources Information Center

Gualtieri, C. Thomas; Johnson, Lynda G.

2008-01-01

Objective: Although ADHD medications are effective for the behavioral components of the disorder, little information exists concerning their effects on cognition, especially in community samples. Method: A cross-sectional study of ADHD patients treated with three different ADHD drugs was conducted. Patients' performance on a computerized…

Type A Behavior Pattern, Impulsiveness, Risk Propensity, and Empathy as Predictors of Dyspnea and Number of Infections in Men with Chronic Obstructive Pulmonary Disease: A Cross-Sectional Study.

PubMed

Witusik, Andrzej; Mokros, Łukasz; Kuna, Piotr; Nowakowska-Domagała, Katarzyna; Antczak, Adam; Pietras, Tadeusz

2018-06-06

BACKGROUND Stress and psychological factors can induce dyspnea in patients with chronic obstructive pulmonary disease (COPD). The aim of this study was to assess selected elements of the clinical presentation of COPD in the context of the severity of type A pattern of behavior, impulsiveness, and tendency for empathy. MATERIAL AND METHODS This was a cross-sectional study. The study group consisted of 179 men with COPD and the control group consisted of 31 healthy male smokers. In all patients, the number of infectious exacerbations over the past year, the result on the dyspnea scale (MRC), and the FEV1-to- predicted FEV1 ratio was assessed. The A pattern of behavior was measured using the Type A scale. To measure impulsivity, risk propensity, and empathy, the IVE impulsivity questionnaire was used. RESULTS An increase in the number of infectious exacerbations was associated with an increased score on the Type A scale, an increase in risk propensity, and a decrease in impulsivity score. Increased severity of dyspnea was associated with an increase in Type A behavior pattern score and an increase in the risk propensity score. CONCLUSIONS Type A behavior pattern and risk propensity are independent predictors of the number of infections in the last year and of the subjective severity of dyspnea among men with COPD and healthy male smokers.

Mechanical behavior and shape optimization of lining structure for subsea tunnel excavated in weathered slot

NASA Astrophysics Data System (ADS)

Li, Peng-fei; Zhou, Xiao-jun

2015-12-01

Subsea tunnel lining structures should be designed to sustain the loads transmitted from surrounding ground and groundwater during excavation. Extremely high pore-water pressure reduces the effective strength of the country rock that surrounds a tunnel, thereby lowering the arching effect and stratum stability of the structure. In this paper, the mechanical behavior and shape optimization of the lining structure for the Xiang'an tunnel excavated in weathered slots are examined. Eight cross sections with different geometric parameters are adopted to study the mechanical behavior and shape optimization of the lining structure. The hyperstatic reaction method is used through finite element analysis software ANSYS. The mechanical behavior of the lining structure is evidently affected by the geometric parameters of crosssectional shape. The minimum safety factor of the lining structure elements is set to be the objective function. The efficient tunnel shape to maximize the minimum safety factor is identified. The minimum safety factor increases significantly after optimization. The optimized cross section significantly improves the mechanical characteristics of the lining structure and effectively reduces its deformation. Force analyses of optimization process and program are conducted parametrically so that the method can be applied to the optimization design of other similar structures. The results obtained from this study enhance our understanding of the mechanical behavior of the lining structure for subsea tunnels. These results are also beneficial to the optimal design of lining structures in general.

Family Health Climate and Adolescents’ Physical Activity and Healthy Eating: A Cross-Sectional Study with Mother-Father-Adolescent Triads

PubMed Central

Niermann, Christina Y. N.; Kremers, Stef P. J.; Renner, Britta; Woll, Alexander

2015-01-01

Introduction The importance of the family environment for children’s and adolescents’ health behavior has been demonstrated, the underlying mechanisms of this influence remain unclear. Therefore, the aim of the study was to investigate the relationship between family environmental and individual determinants. It was hypothesized that the Family Health Climate (FHC) is associated with adolescents’ physical activity and dietary behavior and that intrinsic motivation mediates this association. Methods Cross-sectional data were collected from 198 families (mother, father, and child) using questionnaires. Perceptions of FHC of mothers, fathers, and their children were assessed using the FHC-scales for physical activity (FHC-PA) and nutrition (FHC-NU). The adolescents also rated their intrinsic motivation for exercise and healthy eating, their physical activity and consumption of healthful food. A structural equation model was analyzed and a bootstrapping procedure was used to test direct and indirect effects. Results The FHC-PA was related to the amount of weekly physical activity and the FHC-NU to the consumption of fruit, vegetables and salad. These effects were mediated by adolescents’ intrinsic motivation; the indirect effects were significant for both behaviors. Discussion These results emphasize the importance of the FHC in shaping adolescents’ physical activity and dietary behavior. Individual motivational factors are potential mediators of family and parental influences. Considering family-level variables and their interaction with individual factors contributes to the understanding of adolescents’ health behavior. PMID:26606157

Employee empowerment, innovative behavior and job productivity of public health nurses: a cross-sectional questionnaire survey.

PubMed

Chang, Li-Chun; Liu, Chieh-Hsing

2008-10-01

Employee empowerment is an important organizational issue. Empowered employees with new ideas and innovative attributes may increase their ability to respond more effectively to face extensive changes in current public health care work environments. The objective of this study was to investigate the relationships between employee empowerment, innovative behaviors and job productivity of public health nurses (PHNs). This study conducted a cross-sectional research design. Purposive sampling was conducted from six health bureaus in northern Taiwan. 670 PHNs were approached and 576 valid questionnaires were collected, with a response rate of 85.9%. Structured questionnaires were used to collect data by post. Meaning and competence subscales of psychological empowerment, information and opportunity subscales of organizational empowerment, and innovative behaviors were the predictors of job productivity, only accounting for 16.4% of the variance. The competence subscale of psychological empowerment made the most contribution to job productivity (beta = 0.31). Meaning subscale of psychological empowerment has a negative impact on job productivity. Employee empowerment and innovative behavior of PHNs have little influence on job productivity. Employees with greater competence for delivering public health showed higher self-evaluated job productivity. The negative influences on job productivity possibly caused by conflict meaning on public health among PHNs in current public health policy. It should be an issue in further researches. Public health department should strengthen continuing education to foster competence of psychological sense of empowerment and innovative behavior to increase job productivity

Child Pedestrian Injury: A Review of Behavioral Risks and Preventive Strategies

PubMed Central

Schwebel, David C.; Davis, Aaron L.; O’Neal, Elizabeth E.

2011-01-01

Pedestrian injury is among the leading causes of pediatric death in the United States and much of the world. This paper is divided into two sections. First, we review the literature on behavioral risk factors for child injury. Cognitive and perceptual development risks are discussed. The roles of distraction, temperament and personality, and social influences from parents and peers are presented. We conclude the first section with brief reviews of environmental risks, pedestrian safety among special populations, and the role of sleep and fatigue on pediatric pedestrian safety. The second section of the review considers child pedestrian injury prevention strategies. Categorized by mode of presentation, we discuss parent instruction strategies, school-based instruction strategies (including crossing guards), and streetside training techniques. Technology-based training strategies using video, internet, and virtual reality are reviewed. We conclude the section on prevention with discussion of community-based interventions. PMID:23066380

Death Anxiety and Pain Catastrophizing Among Male Inmates With Nonsuicidal Self-Injury Behavior: A Comparative Study

PubMed Central

Enea, Violeta; Dafinoiu, Ion; Bogdan, Georgiana; Matei, Carmen

2015-01-01

Most of the studies concerning nonsuicidal self-injury behaviors of persons deprived of liberty were on female participants. This cross-sectional comparative study compared the levels of death anxiety, pain catastrophizing, dissociative experiences, and state-trait anger among male inmates with nonsuicidal self-injury behaviors and noninjuring controls. The results indicated high levels of death anxiety, dissociation, and pain catastrophizing in both groups of participants and the absence of significant differences between the groups. The implications of the results suggest the need of taking into consideration these variables in the behavior management plans used with inmates who engage in self-injurious behavior. PMID:26186948

Emotional autonomy and problem behavior among Chinese adolescents.

PubMed

Chou, Kee-Lee

2003-12-01

The author examined the association between emotional autonomy and problem behavior among Chinese adolescents living in Hong Kong. The respondents were 512 adolescents, 16 to 18 years of age, who were interviewed for a cross-sectional study. Three dimensions of emotional autonomy including individuation, nondependency on parents, and de-idealization of parents were significantly and positively correlated with the amount of problem behavior the participants engaged in during the past 6 months. Using a simple linear multiple regression model, the author found that problem behavior was associated with only one aspect of emotional autonomy-individuation. Results indicated that the relationship between problem behavior and three aspects of emotional autonomy was similar in both individualistic and collectivistic societies.

Let’s Talk about Sex, Maybe: Interviewers, Respondents, and Sexual Behavior Reporting in Rural South Africa

PubMed Central

Angotti, Nicole; Clark, Samuel J.; Williams, Jill; Gómez-Olivé, F. Xavier; Menken, Jane; Kabudula, Chodziwadziwa; Klipstein-Grobusch, Kerstin; Tollman, Stephen M.

2016-01-01

Researchers are often skeptical of sexual behavior surveys: respondents may lie or forget details of their intimate lives, and interviewers may exercise authority in how they capture responses. We use data from a 2010–2011 cross-sectional sexual behavior survey in rural South Africa to explore who says what to whom about their sexual lives. Results show an effect of fieldworker age across outcomes -- respondents report “safer”, more “responsible” sexual behavior to older fieldworkers; and an effect of fieldworker sex -- men report more sexual partners to female fieldworkers. Understanding fieldworker effects on the production of sexual behavior survey data serves methodological and analytical goals. PMID:28190977

Problematic eating and its association with early childhood caries among 46-71-month-old children using Children's Eating Behavior Questionnaire (CEBQ): a cross sectional study.

PubMed

Anandakrishna, Latha; Bhargav, Neha; Hegde, Amitha; Chandra, Prakash; Gaviappa, Dhananjaya; Shetty, Ashmitha Kishan

2014-01-01

Problematic eating behavior in children presents a wide spectrum from anorexia, selective eating, and fussy eating to neophobia. Pouching of food and slow eating represents eating behavioral problems that may be relevant to pediatric dentist as far as early childhood caries (ECC) is concerned. The aim of this study was to determine the prevalence of problematic eating and its association with ECC among 46-71-month-old children in Bengaluru city, India. A cross-sectional study was carried out in 250 children aged 46-71 months old in various schools of Bengaluru city. All the selected children were clinically examined for dental caries using decayed, missing, filled surfaces index. Children's eating behavior was assessed using Children's Eating Behavior Questionnaire (CEBQ) which was filled by the parents. Both descriptive statistics as well as Chi-square test was used with SPSS 16.00. The prevalence of dental caries was found to be 34%. It was observed that 81.6% of the children did not have a tendency to keep food in their mouth all the time and ECC was found to be significantly less. Furthermore, approximately 90% of the children did not have a tendency to eat too much and in those, 68% of them were caries free which was statistically significant. Prevalence of ECC was highest (52.6%) in children who ate more when they had nothing else to do. Problematic eating behavior is prevalent in the preschooler group and needs to be considered by the pediatric dentist.

The Mediating Role of Mental Health in the Relations between Dietary Behaviors and General Health: A Cross-sectional Study

PubMed Central

Nematollahi, Shahrzad; Keshteli, Ammar Hassanzadeh; Esmaillzadeh, Ahmad; Roohafza, Hamidreza; Afshar, Hamid; Adibi, Peyman; Maracy, Mohammad Reza

2017-01-01

Background: The aim of this study is to find a pathway to explaining the relations between dietary behaviors with mental health and psychological functioning. Materials and Methods: This cross-sectional study contains 4763 participants from the employees of Isfahan University of Medical Sciences. In this study, four questionnaires were administered which were provided as follows: demographic characteristics, 21-item dietary behaviors questionnaire, Hospital Anxiety and Depression Scale questionnaire, and 12-item General Health Questionnaire (GHQ-12). We started the analysis with the structural equation modeling (SEM) model with 4 unobserved latent and 16 observed variables. Results: The results show that the regression coefficient (standard error) of diet behavior on mental health and mental health on GHQ were − 1 (0.37) and 0.02 (0.01) with their P values as 0.007 and 0.01, respectively. For this model, the estimated root mean square error of approximation is 0.062 with 90% confidence interval of (0.060–0.065). In addition, the comparative fit indices (CFIs) were as 0.866 for incremental fit index and 0.866 for CFI. All these indices represent fairly good fit of the model to the data. Conclusion: We can conclude that “lower scores on diet behavior – higher scores on mental health problems” and “higher mean scores in depression and/or anxiety – higher scores in GHQ domains.” The SEM results showed that dietary behaviors have significance related to depression and/or anxiety and general health status. PMID:28349024

[Health Information Behavior of the South Tyrolean Population: An Epidemiological Cross-Sectional Study].

PubMed

Vögele, Anna; Becker, Ulrich; Gögele, Anna; Schneider, Antonius; Engl, Adolf

2018-06-04

Investigation of the health information behavior, self-rated health, confidence in health issues and specific attitudes to health among the South Tyrolean population. Our study is an epidemiological cross-sectional study; data were collected via telephone interviews, using a questionnaire developed for this purpose that covered various aspects of information and health-related behavior. For the elaboration of the typology of the most distinctive stereotypes in terms of health information and health-related behavior, a hierarchical cluster analysis was performed. We assessed 504 correct telephone interviews. The majority of the respondents considered themselves health-conscious and preferred heterogeneous information media. The most used information media for health issues were mass media, i. e. newspapers or magazines and television or radio. The internet was used less as a source of information. Younger individuals assessed themselves to be healthier than older people, and older women aged 65 years or more were the most health-impaired group. Respondents had greatest confidence in their general practitioner, their own feeling or experience. Thus, in terms of health information and health behavior, the following four classes of people could be distinguished, namely "internet information elite", "robust fatalists", "stricken" and "health-conscious mainstreamers". Our results show that the South Tyrolean population has a high level of health consciousness and gathers health information from various media. The characterization of different patient typologies of information processing in combination with health-related behavior indicates that information about health and illness should be appropriately addressed to the respective stereotype. © Georg Thieme Verlag KG Stuttgart · New York.

Relationship between religion and school students' road behavior in southern Iran.

PubMed

Tabrizi, Reza; Akbari, Maryam; Lankarani, Kamran B; Heydari, Seyed Taghi; Masoudi, Alireza; Shams, Amir Hossein; Akbarzadeh, Armin; Moalemi, Saba; Mehr, Maryam Mahmoodi; Sadati, Ahmad Kalateh; Peymani, Payam

2017-10-01

Unsafe behaviors are an important cause of accidents in adolescent age groups. This study was designed to examine the behaviors of adolescent pedestrians in southern Iran. This is a descriptive analytical cross-sectional study. The study population consisted of high school students in Shiraz, capital city of Fars Province, Iran. Five hundred and sixteen students were selected by multi-stage sampling. Data were collected by the use of three questionnaires, which included Persian copies of adolescent road user behavior questionnaire (ARBQ), Duke University Religious Index (DUREL), as well as the context and independent variables questionnaire. The results showed that a decrease in dangerous behaviors on the road resulted in an increase in respondents' intrinsic religiosity. Also, engagement in unsafe crossing behavior in the road decreased with increasing respondents' intrinsic religiosity. Another finding showed that female students were less involved in dangerous play and planned protective behaviors on the road. Findings clearly indicate that intrinsic religiosity has a significant role in reducing the risky road behaviors of students. Hence, religion may improve road safety in school students' road behavior in Iran. Copyright © 2017 Daping Hospital and the Research Institute of Surgery of the Third Military Medical University. Production and hosting by Elsevier B.V. All rights reserved.

Cross-cultural differences and sexual risk behavior of emerging adults.

PubMed

Thomas, Tami L; Yarandi, Hossein N; Dalmida, Safiya George; Frados, Andrew; Klienert, Kathleen

2015-01-01

The authors examined population-specific risk factors that increase emerging adults' risk of acquiring sexually transmitted infections (STIs), including the human papillomavirus (HPV). A cross-sectional sample of 335 diverse, emerging adults ages 18 to 24 years was recruited from a health center at a large university in the Southeastern United States. The mean age was 20.6 ± 1.9 years, majority were females (74.0%), and 61.0% were Hispanic. Findings revealed inconsistent condom use, reasons for not using condoms, and a need for more culturally specific intervention strategies. Healthcare providers should identify culturally specific reasons for inconsistent condom use, examine cultural and geographic differences in sexual risk behaviors among groups and communities, and modify communication, educational programs, and interventions accordingly. By adopting a multicultural approach to the control of STIs, nurses can address specific cultural attitudes and behaviors that may influence exposure to STIs, including HPV. © The Author(s) 2014.

Electron-impact-ionization dynamics of S F6

NASA Astrophysics Data System (ADS)

Bull, James N.; Lee, Jason W. L.; Vallance, Claire

2017-10-01

A detailed understanding of the dissociative electron ionization dynamics of S F6 is important in the modeling and tuning of dry-etching plasmas used in the semiconductor manufacture industry. This paper reports a crossed-beam electron ionization velocity-map imaging study on the dissociative ionization of cold S F6 molecules, providing complete, unbiased kinetic energy distributions for all significant product ions. Analysis of these distributions suggests that fragmentation following single ionization proceeds via formation of S F5 + or S F3 + ions that then dissociate in a statistical manner through loss of F atoms or F2, until most internal energy has been liberated. Similarly, formation of stable dications is consistent with initial formation of S F4 2 + ions, which then dissociate on a longer time scale. These data allow a comparison between electron ionization and photoionization dynamics, revealing similar dynamical behavior. In parallel with the ion kinetic energy distributions, the velocity-map imaging approach provides a set of partial ionization cross sections for all detected ionic fragments over an electron energy range of 50-100 eV, providing partial cross sections for S2 +, and enables the cross sections for S F4 2 + from S F+ to be resolved.

Level of modern health care seeking behaviors among mothers having under five children in Dangila town, north West Ethiopia, 2016: a cross sectional study.

PubMed

Dagnew, Amare Belachew; Tewabe, Tilahun; Murugan, Rajalakshmi

2018-05-29

Health seeking behavior is an action taken by an individual who perceive to have a health problem. In most developing countries including Ethiopia the health of the children is strongly dependant on maternal health care behavior. Most childhood morbidities and mortalities are associated with low level of mothers health care seeking behavior. Therefore, the objective of this study was to assess level of modern health care seeking behavior among mothers having under five children in Dangila town, North West Ethiopia. Community based quantitative cross-sectional study was conducted from April 15 to May 15, 2016. Systematic random sampling technique was used to select study participants. A total of273 mothers with children less than five years were included in this study. The data was collected from all five Kebeles using interviewer administered questionnaire. Descriptive and inferential statistics were used to present the data. Both bivariate and multivariate logistic regression analyses were used to identify factors associated with level of modern health care seeking behavior. Prevalence of modern health care seeking behavior was 82.1%. Age of mothers (AOR = 2.4(1.1, 5.3), age of the child (AOR = 6.7(2.8, 22.2), severity of illness (AOR = 5.2(1.2, 22.6) and family number (AOR = 6.4(2.1, 20.2) were predictors of modern health care seeking behavior among mothers. Majority of the mothers preferred to take their children to modern health care when they got illness. Age of children, age of mother, number of family and severity of illness were the determinant factors for modern health care seeking behavior. Therefore, health care services should be strengthened at community level through community integrated management of childhood illness, information, education communication / behavioral change communication strategies to improve mothers health care seeking behaviors.

Theoretical investigation of two-particle two-hole effects on spin-isospin excitations through charge-exchange reactions

NASA Astrophysics Data System (ADS)

Fukui, Tokuro; Minato, Futoshi

2017-11-01

Background: Coherent one-particle one-hole (1p1h) excitations have given us effective insights into general nuclear excitations. However, the two-particle two-hole (2p2h) excitation beyond 1p1h is now recognized as critical for the proper description of experimental data of various nuclear responses. Purpose: The spin-flip charge-exchange reactions 48Ca(p ,n )48Sc are investigated to clarify the role of the 2p2h effect on their cross sections. The Fermi transition of 48Ca via the (p ,n ) reaction is also investigated in order to demonstrate our framework. Methods: The transition density is calculated microscopically with the second Tamm-Dancoff approximation, and the distorted-wave Born approximation is employed to describe the reaction process. A phenomenological one-range Gaussian interaction is used to prepare the form factor. Results: For the Fermi transition, our approach describes the experimental behavior of the cross section better than the Lane model, which is the conventional method. For spin-flip excitations including the GT transition, the 2p2h effect decreases the magnitude of the cross section and does not change the shape of the angular distribution. The Δ l =2 transition of the present reaction is found to play a negligible role. Conclusions: The 2p2h effect will not change the angular-distributed cross section of spin-flip responses. This is because the transition density of the Gamow-Teller response, the leading contribution to the cross section, is not significantly varied by the 2p2h effect.

Effects of quantum interference between radiative and dielectronic recombination on photorecombination cross-section profiles for the He-like ions Ar{sup 16+} and Fe{sup 24+}

DOE Office of Scientific and Technical Information (OSTI.GOV)

Behar, Ehud; Jacobs, Verne L.; Oreg, Joseph

Total cross sections for electron-ion photorecombination (PR) processes are calculated using a projection-operator and resolvent-operator approach. This approach provides a unified quantum-mechanical description of the combined electron-ion PR process, including radiative and dielectronic recombination as coherent, interfering components. An especially adapted version of the Hebrew-University Lawrence-Livermore Atomic Code HULLAC is developed and employed for the calculations. In particular, PR cross sections for He-like argon and iron ions are calculated for incident-electron energies in the vicinity of the 1s2l2l{sup '} and 1s2l3l{sup '} doubly-excited, autoionizing levels of the Li-like ions. Significant effects of quantum interference between radiative and dielectronic recombination, inmore » the form of asymmetric PR cross-section profiles, are predicted, especially for weak transitions. The general behavior of the interference effect, as a function of the ion charge q and as a function of the principal quantum number n{sup '} of the outer electron in the autoionizing state, is investigated using a hydrogenic-scaling analysis. It is found that the degree of asymmetry in the PR cross-section profile can be substantial for close-to-neutral ions and also for very highly-charged ions. In the intermediate-charge regime, on the other hand, the asymmetry is anticipated to be less prominent. The dependence of the quantum-interference effect on n{sup '} is predicted to be much weaker.« less

Cross sections and Rosenbluth separations from kaon electroproduction on protons up to Q(2) = 2.35(GeV/c)(2)

NASA Astrophysics Data System (ADS)

Coman, Marius

The kaon electroproduction reaction H(e, e 'K+)Λ was studied as a function of the four momentum transfer, Q2, for different values of the virtual photon polarization parameter. Electrons and kaons were detected in coincidence in two High Resolution Spectrometers (HRS) at Jefferson Lab. Data were taken at electron beam energies ranging from 3.4006 to 5.7544 GeV. The kaons were identified using combined time of flight information and two Aerogel Cerenkov detectors used for particle identification. For different values of Q2 ranging from 1.90 to 2.35 GeV/c2 the center of mass cross sections for the Λ hyperon were determined for 20 kinematics and the longitudinal, sigma L, and transverse, sigmaT, terms were separated using the Rosenbluth separation technique. Comparisons between available models and data have been studied. The comparison supports the t-channel dominance behavior for kaon electroproduction. All models seem to underpredict the transverse cross section. An estimate of the kaon form factor has been explored by determining the sensitivity of the separated cross sections to variations of the kaon EM form factor. From comparison between models and data we can conclude that interpreting the data using the Regge model is quite sensitive to a particular choice for the EM form factors. The data from the E98-108 experiment extends the range of the available kaon electroproduction cross section data to an unexplored region of Q2 where no separations have ever been performed.

Correlating Resolving Power, Resolution, and Collision Cross Section: Unifying Cross-Platform Assessment of Separation Efficiency in Ion Mobility Spectrometry.

PubMed

Dodds, James N; May, Jody C; McLean, John A

2017-11-21

Here we examine the relationship among resolving power (R p ), resolution (R pp ), and collision cross section (CCS) for compounds analyzed in previous ion mobility (IM) experiments representing a wide variety of instrument platforms and IM techniques. Our previous work indicated these three variables effectively describe and predict separation efficiency for drift tube ion mobility spectrometry experiments. In this work, we seek to determine if our previous findings are a general reflection of IM behavior that can be applied to various instrument platforms and mobility techniques. Results suggest IM distributions are well characterized by a Gaussian model and separation efficiency can be predicted on the basis of the empirical difference in the gas-phase CCS and a CCS-based resolving power definition (CCS/ΔCCS). Notably traveling wave (TWIMS) was found to operate at resolutions substantially higher than a single-peak resolving power suggested. When a CCS-based R p definition was utilized, TWIMS was found to operate at a resolving power between 40 and 50, confirming the previous observations by Giles and co-workers. After the separation axis (and corresponding resolving power) is converted to cross section space, it is possible to effectively predict separation behavior for all mobility techniques evaluated (i.e., uniform field, trapped ion mobility, traveling wave, cyclic, and overtone instruments) using the equations described in this work. Finally, we are able to establish for the first time that the current state-of-the-art ion mobility separations benchmark at a CCS-based resolving power of >300 that is sufficient to differentiate analyte ions with CCS differences as small as 0.5%.

Delinquent and Aggressive Behavior and Social Desirability Among Roma and Non-Roma Adolescents in Slovakia: A Cross-Sectional Study.

PubMed

Kolarcik, Peter; Madarasova Geckova, Andrea; Reijneveld, Sijmen A; van Dijk, Jitse P

2016-02-01

Rates of aggression and delinquency are assumed to be higher among Roma and other minorities, but sound evidence of this is lacking. Our aim was to assess delinquent and aggressive behavior among Roma and non-Roma adolescents and the effects on ethnic differences of parental education and social desirability. We conducted a cross-sectional study among Roma from separated and segregated settlements in the eastern part of Slovakia (N = 330; Mage = 14.50; interview) and non-Roma adolescents (N = 722; Mage = 14.86; questionnaire). The effect of ethnicity on antisocial behaviors was analyzed using linear regression (crude) and adjusted for gender, parental education, and social desirability. Adjustment for social desirability diminished the ethnic differences in delinquency (B = 1.08; 95% confidence interval [CI] = [2.12, -0.04]), led to an increase in the differences in hostility (B = 2.43; 95% CI = [0.87, 3.99]), and led to the disappearance of differences in physical aggression (B = 0.45; 95% CI = [1.14, 2.07]). Parental education did not affect the associations in an important way. Our findings indicate that Roma are not that much different from non-Roma, in terms of antisocial behavior, which contradicts the general perception of Roma. Our findings should be confirmed in other settings. © The Author(s) 2014.

The Relationship between Perceived Training Opportunities, Work Motivation and Employee Outcomes

ERIC Educational Resources Information Center

Dysvik, Anders; Kuvaas, Bard

2008-01-01

The purpose of this study was to explore alternative relationships between training opportunities and employee outcomes. A cross-sectional survey of 343 trainees from a broad range of Norwegian service organizations showed that the relationship between perceived training opportunities, and both task performance and citizenship behaviors were fully…

Association of objectively measured physical activity with cardiovascular risk in mobility-limited older adults

USDA-ARS?s Scientific Manuscript database

Background: Data are sparse regarding the impacts of habitual physical activity (PA) and sedentary behavior on cardiovascular (CV) risk in older adults with mobility limitations. Methods and Results: This study examined the baseline, cross-sectional association between CV risk and objectively measur...

Adolescent Ethnolinguistic Stability and Change: A Longitudinal Study

ERIC Educational Resources Information Center

Kohn, Mary Elizabeth

2013-01-01

Most sociolinguistic studies rely on apparent time, cross-sectional methods to analyze language change. On the basis of apparent time data, sociolinguists have hypothesized that cultural processes of lifespan change create predictable cycles of linguistic behavior in which adolescents lead in the use of vernacular variants and advance sound change…

Dietary & health predictors associated with overweight & obesity in young adults: the Bogalusa Heart Study

USDA-ARS?s Scientific Manuscript database

We examined independent associations between diet and lifestyle behaviors; differences in markers of cardiovascular disease (CVD), and type 2 diabetes mellitus (T2DM); and self-reported health problems among normal weight (NW); overweight (OW), and obese (OB) young adults. Cross-sectional data on pa...

A Supervisory View of Unit Effectiveness. Technical Report.

ERIC Educational Resources Information Center

Weitzel, William; And Others

First-level supervisors from a cross section of business and industrial organizations provided evaluative and descriptive information about the immediate work group which each supervised. From this information, a model was built depicting first-level supervisory perceptions of behaviors which lead to work unit effectiveness. This model was…

Young Girls' Eating Attitudes and Body Image Dissatisfaction: Associations with Communication and Modeling

ERIC Educational Resources Information Center

Kichler, Jessica C.; Crowther, Janis H.

2009-01-01

The relationships among communication, modeling, body image dissatisfaction, and maladaptive eating attitudes and behaviors in preadolescent girls were investigated in a cross-sectional study of 69 girls in fourth through sixth grade and their mothers. Participants completed questionnaires assessing familial and peer influences, body image…

Cultural Participation in the Philadelphia Area.

ERIC Educational Resources Information Center

Hanford, Terry; And Others

Described are the results of two separate surveys of cross-sections of the Philadelphia public concerning their cultural behavior, attitudes, and perceptions. The more recent survey was conducted in 1984 with a random telephone sample of 404 Philadelphia residents. The other survey consisted of a subset of approximately 400 Philadelphia area…

Urban Men's Knowledge and Perceptions regarding Sexually Transmitted Infections in Pakistan

ERIC Educational Resources Information Center

Mohammad Mir, Ali; Reichenbach, Laura; Wajid, Abdul

2009-01-01

In a pioneering study undertaken in Pakistan, urban men's sexual behaviors, perceptions and knowledge regarding sexually transmitted infections including HIV/AIDS were determined by employing both qualitative and quantitative research methods. Focus group discussions were carried out initially and followed by a structured cross sectional survey…

Media and Sex among Alternative School Students

ERIC Educational Resources Information Center

Escobar-Chaves, Soledad Liliana; Tortolero, Susan R.; Markham, Christine; Baumler, Elizabeth

2006-01-01

A school-based, cross-sectional survey was conducted among 927 Latino and African American students attending 10 alternative schools in Houston, Texas, to investigate mass media consumption and its influence on sexual risk-taking behavior. Among males, exposure to television increased their risk of engaging in early sexual intercourse. Females who…

Weight Misperception and Health Risk Behaviors among Early Adolescents

ERIC Educational Resources Information Center

Pasch, Keryn E.; Klein, Elizabeth G.; Laska, Melissa N.; Velazquez, Cayley E.; Moe, Stacey G.; Lytle, Leslie A.

2011-01-01

Objectives: To examine associations between weight misperception and youth health risk and protective factors. Methods: Three thousand ten US seventh-graders (72.1% white, mean age: 12.7 years) self-reported height, weight, risk, and protective factors. Analyses were conducted to determine cross-sectional and longitudinal associations between…

Favorable Impact of Nutrition Education on California WIC Families

ERIC Educational Resources Information Center

Ritchie, Lorrene D.; Whaley, Shannon E.; Spector, Phil; Gomez, Judy; Crawford, Patricia B.

2010-01-01

Objective: To explore the impact of coordinated statewide nutrition education on Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) family behavior regarding fruits and vegetables, whole grains, and lower-fat milk. Design: Survey of different cross-sectional samples of WIC families before and after education. Setting:…

Evaluation of Intervention Reach on a Citywide Health Behavior Change Campaign: Cross-Sectional Study Results

ERIC Educational Resources Information Center

Shimazaki, Takashi; Takenaka, Koji

2015-01-01

Little is known about dissemination strategies that contribute to health information recognition. This study examined (a) health campaign exposure and awareness (slogan and logo recognition); (b) perceived communication channels; (c) differences between perceptions of researcher-developed and enhancement community health information materials; and…

A Longitudinal Analysis of Adolescent Decision-Making with the Iowa Gambling Task

ERIC Educational Resources Information Center

Almy, Brandon; Kuskowski, Michael; Malone, Stephen M.; Myers, Evan; Luciana, Monica

2018-01-01

Many researchers have used the standard Iowa Gambling Task (IGT) to assess decision-making in adolescence given increased risk-taking during this developmental period. Most studies are cross-sectional and do not observe behavioral trajectories over time, limiting interpretation. This longitudinal study investigated healthy adolescents' and young…

Canada Youth & AIDS Study.

ERIC Educational Resources Information Center

King, Alan J. C.; And Others

This report contains the findings from a survey of over 38,000 youth in grades 7, 9, 11, and the first year of college or university, designed to obtain a cross-sectional perspective of the development of knowledge, attitudes, and behaviors related to Acquired Immune Deficiency Syndrome and other sexually transmitted diseases (STDs). Also included…

Examining Differences between Light and Heavier Smoking Vocational Students: A Pilot Study

ERIC Educational Resources Information Center

de Araujo, Vanessa A.; Loukas, Alexandra; Gottlieb, Nell H.

2011-01-01

Objective: To examine differences between light and heavier smoking vocational/technical students in tobacco use, related behaviors, and cessation. Design: Cross-sectional. Setting and Methods: Two hundred and four smokers attending two vocational/technical colleges in east Texas, USA, completed an anonymous survey during a regularly scheduled…

Predicting use of ineffective responsive, structure and control vegetable parenting practices with the Model of Goal Directed Behavior

USDA-ARS?s Scientific Manuscript database

This study reports the modeling of three categories of ineffective vegetable parenting practices (IVPP) separately (responsive, structure, and control vegetable parenting practices). An internet survey was employed for a cross sectional assessment of parenting practices and cognitive-emotional varia...

Do Hostile Attribution Biases in Children and Parents Predict Relationally Aggressive Behavior?

ERIC Educational Resources Information Center

Werner, Nicole E.

2012-01-01

Relatively little is understood about the role of hostile attributions in children's use of relational aggression with peers, or about the impact of family processes on children's attributions about ambiguous provocations. This cross-sectional study investigated associations among hostile attributions made by children, mothers, and fathers, and…

School Violence and Student Achievement in Reading and Mathematics among Eighth Graders.

ERIC Educational Resources Information Center

Coleman, Beverly Eugene

This study analyzed base-year student data files from the 1988 National Education Longitudinal Study (NELS:88) cross-sectionally to identify relationships between school violence and student achievement in reading and mathematics. The analysis identified student behavior variables related to three measures of school violence: (1) personal…

Determinants of Prescription Drug Use by Adolescents with Intellectual Disabilities in Taiwan

ERIC Educational Resources Information Center

Yen, Chia-Feng; Lin, Jin-Ding; Loh, Ching-Hui; Shi, Leiyu; Hsu, Shang-Wei

2009-01-01

Direct family caregivers of population-based adolescents with intellectual disabilities in Taiwan were surveyed regarding their perceptions of the use of prescribed medication and its relationship with health-related behaviors, medical care and preventive health utilization of people with intellectual disabilities. Cross-sectional data on 1419…

Beyond Risk: Examining College Students' Sexual Decision Making

ERIC Educational Resources Information Center

Oswalt, Sara B.

2010-01-01

Sexual health education often focuses on prevention of sexually transmitted infections and unintended pregnancies, but the decision to engage in sexual activity is equally important. This cross-sectional study examined the decisions of college students (n = 422) to engage in oral sex, vaginal sex, and other sexual behaviors. Regression analyses…

Gang Membership and Drug Involvement: Untangling the Complex Relationship

ERIC Educational Resources Information Center

Bjerregaard, Beth

2010-01-01

Previous research has consistently demonstrated a relationship between gang membership and involvement in illegal substances. In addition, researchers have noted that gang members are frequently more heavily involved in drug sales, which often lead to increases in violent behaviors. Most of this research, however, is either cross-sectional or…

Parenting Style and Family Meals: Cross-Sectional and 5-year Longitudinal Associations

PubMed Central

Berge, Jerica M.; Wall, Melanie; Neumark-Sztainer, Dianne; Larson, Nicole; Story, Mary

2010-01-01

Background Research on family meals in the last decade has shown a positive association between family meal frequency and adolescent healthy dietary intake. However, less is known about factors within the home environment, such as parenting style, which may be associated with family meal patterns. Objective The purpose of this study is to test cross-sectional and five-year longitudinal associations between parenting styles (authoritative, authoritarian, permissive, neglectful) and the frequency of family meals among adolescents. Study Design Data were from Project EAT (Eating Among Teens), a population-based study comprised of youth from diverse ethnic/racial and socioeconomic backgrounds. Two cohorts of adolescents (middle school, high school) completed in-class surveys in 1999 (Time 1) and mailed surveys in 2004 (Time 2). Multiple linear regression models were used to predict mean frequency of family meals at Time 1 and Time 2 from adolescent report of parenting style (both mother and father) at Time 1. Cross-sectional analyses included both adolescent cohorts (n = 4,746) and longitudinal analyses included only the younger cohort (n = 806) because family meal frequency was not assessed in the older cohort at Time 2. Results Cross-sectional results for adolescent girls indicated a positive association between maternal and paternal authoritative parenting style and frequency of family meals. For adolescent boys, maternal authoritative parenting style was associated with more frequent family meals. Longitudinal results indicated that authoritative parenting style predicted higher frequency of family meals five years later, but only between opposite sex parent/adolescent dyads. Conclusions Future research should identify additional factors within the home environment that are associated with family meal frequency in order to develop effective interventions that result in increased family meals for youth. Also, future research should investigate the mealtime behaviors of authoritative parents and identify specific behaviors that dietitians and other health care providers could share with parents of adolescents to help them increase family meal frequency. PMID:20630160

Parenting style and family meals: cross-sectional and 5-year longitudinal associations.

PubMed

Berge, Jerica M; Wall, Melanie; Neumark-Sztainer, Dianne; Larson, Nicole; Story, Mary

2010-07-01

Research on family meals in the past decade has shown a positive association between family meal frequency and adolescent healthy dietary intake. However, less is known about factors within the home environment, such as parenting style, that may be associated with family meal patterns. The purpose of this study is to test cross-sectional and 5-year longitudinal associations between parenting styles (authoritative, authoritarian, permissive, and neglectful) and the frequency of family meals among adolescents. Data were from Project Eating Among Teens, a population-based study comprised of youth from diverse ethnic/racial and socioeconomic backgrounds. Two cohorts of adolescents (middle school and high school) completed in-class surveys in 1999 (Time 1) and mailed surveys in 2004 (Time 2). Multiple linear regression models were used to predict mean frequency of family meals at Time 1 and Time 2 from adolescent report of parenting style (both mother and father) at Time 1. Cross-sectional analyses included both adolescent cohorts (n=4,746) and longitudinal analyses included only the younger cohort (n=806) because family meal frequency was not assessed in the older cohort at Time 2. Cross-sectional results for adolescent girls indicated a positive association between maternal and paternal authoritative parenting style and frequency of family meals. For adolescent boys, maternal authoritative parenting style was associated with more frequent family meals. Longitudinal results indicated that authoritative parenting style predicted higher frequency of family meals 5 years later, but only between opposite sex parent/adolescent dyads. Future research should identify additional factors within the home environment that are associated with family meal frequency to develop effective interventions that result in increased family meals for youth. Also, future research should investigate the mealtime behaviors of authoritative parents and identify specific behaviors that dietetics practitioners and other health care providers could share with parents of adolescents to help them increase family meal frequency. Copyright 2010 American Dietetic Association. Published by Elsevier Inc. All rights reserved.

Agreement between parents and adolescents on emotional and behavioral problems and its associated factors among Chinese school adolescents: a cross-sectional study.

PubMed

Wang, Jiana; Liu, Li; Wu, Hui; Yang, Xiaoshi; Wang, Yang; Wang, Lie

2014-04-15

Most studies about informant agreements on adolescents' emotional and behavioral problems have been conducted in Western countries, but this subject has not been well researched in China. The aim of this study was to evaluate the pattern of parent-adolescent agreement on adolescents' problems and its associated factors among school-age adolescents in China. This cross-sectional study was conducted in November and December of 2010. A questionnaire including the Child Behavior Checklist (CBCL), the Youth Self-Report (YSR), the Family Environment Scale (FES) and the characteristics of the child (age and gender), parents (parent-adolescent relationship and parental expectations) and family (family structure, negative life events) was distributed to our study population. A total of 2,199 Chinese adolescents (aged 11-18) from 15 public schools in Liaoning Province, who completed the questionnaire, became our final participants. Pearson's correlation coefficient was used to assess parent-adolescent agreement, and linear regression analysis was used to explore the associated factors of parent-adolescent discrepancies on emotional and behavioral problems. The parent-adolescent agreement on emotional and behavioral problems was high (mean r = 0.6). The scores of YSR were higher than those of CBCL. Factors that increased informant discrepancies on emotional and behavioral problems were boys, older age, the experience of negative life events, low levels of cohesion and organization, and high levels of conflict in the family. A high level of parent-adolescent agreement on emotional and behavioral problems was found. Adolescents reported more problems than their parents did. Family environment is an important factor to be considered when interpreting informant discrepancies on the mental health of Chinese adolescents.

Longitudinal effects of religious involvement on religious coping and health behaviors in a national sample of African Americans.

PubMed

Holt, Cheryl L; Roth, David L; Huang, Jin; Park, Crystal L; Clark, Eddie M

2017-08-01

Many studies have examined associations between religious involvement and health, linking various dimensions of religion with a range of physical health outcomes and often hypothesizing influences on health behaviors. However, far fewer studies have examined explanatory mechanisms of the religion-health connection, and most have overwhelmingly relied on cross-sectional analyses. Given the relatively high levels of religious involvement among African Americans and the important role that religious coping styles may play in health, the present study tested a longitudinal model of religious coping as a potential mediator of a multidimensional religious involvement construct (beliefs; behaviors) on multiple health behaviors (e.g., diet, physical activity, alcohol use, cancer screening). A national probability sample of African Americans was enrolled in the RHIAA (Religion and Health In African Americans) study and three waves of telephone interviews were conducted over a 5-year period (N = 565). Measurement models were fit followed by longitudinal structural models. Positive religious coping decreased modestly over time in the sample, but these reductions were attenuated for participants with stronger religious beliefs and behaviors. Decreases in negative religious coping were negligible and were not associated with either religious beliefs or religious behaviors. Religious coping was not associated with change in any of the health behaviors over time, precluding the possibility of a longitudinal mediational effect. Thus, mediation observed in previous cross-sectional analyses was not confirmed in this more rigorous longitudinal model over a 5-year period. However, findings do point to the role that religious beliefs have in protecting against declines in positive religious coping over time, which may have implications for pastoral counseling and other faith-based interventions. Copyright © 2017 Elsevier Ltd. All rights reserved.

Understanding young adult physical activity, alcohol and tobacco use in community colleges and 4-year post-secondary institutions: A cross-sectional analysis of epidemiological surveillance data

PubMed Central

2010-01-01

Background Young adults experience many adverse health behavior changes as they transition from adolescence into adulthood. A better understanding of the relationships between health promoting and risky health behaviors may aid in the development of health promotion interventions for various types of young adult post-secondary students. Therefore, the purpose of this study was to examine associations between alcohol and tobacco use and physical activity among 2-year and 4-year college students. Methods Cross-sectional analyses were conducted using 2007 survey data, collected as part of an on-going post-secondary health surveillance system in Minnesota. Students were randomly selected to participant from 14 Minnesota colleges and universities (six 2-year community and/or technical colleges, eight 4-year post-secondary institutions). The 2007 surveillance data included 9,931 respondents. Results The prevalence of demographic characteristics and health behaviors (e.g., physical activity, tobacco use) differed between young adults attending 2-year and 4-year post-secondary institutions; in general, those attending 2-year institutions are representative of more at-risk populations. Overall, higher levels of moderate, vigorous and strengthening physical activity were associated with higher levels of alcohol consumption and lower levels of smoking. In general, despite the disparities in the prevalence of these risk behaviors, the associations between the behaviors did not differ substantially between 2-year and 4-year post-secondary populations. Conclusions These findings illustrate links between leading risk behaviors. Interventions targeting multiple risk behaviors among young adults may warrant further consideration. Overall, future research is needed to support and inform young adult health promotion efforts that may be implemented in a wide array of post-secondary institutions. PMID:20420678

Exploring effects of self-management on glycemic control using a modified information-motivation-behavioral skills model in type 2 diabetes mellitus patients in Shanghai, China: A cross-sectional study.

PubMed

Chen, Qi; Wang, Huwen; Wang, Yichen; Wang, Zezhou; Zhao, Daijun; Cai, Yong

2018-02-19

The original information-motivation-behavioral skills (IMB) model has been verified in type 2 diabetes mellitus (T2DM) patients, but the effects of the model on glycemic control remain unclear. The aim of this study was to modify the IMB model to explore the effects of self-management on glycemic control in T2DM patients in Shanghai, China. A cross-sectional study was conducted on participants recruited using a convenience sampling method between June and August 2015 in three tertiary hospitals and four community health service centers; 796 participants meeting the inclusion criteria (age ≥18 years and a diagnosis of T2DM) completed a questionnaire and blood test for glycemic control. Structural equation models were used to test the IMB framework. The modified model demonstrated an acceptable fit of the data. Paths from information to self-management behaviors (β = 0.119, P = 0.001) and HbA1c (β = -0.140, P < 0.001), from motivation to behavioral skills (β = 0.670, P < 0.001), from behavioral skills to self-management behaviors (β = 0.562, P < 0.001), and from self-management behaviors to HbA1c (β = -0.343, P < 0.001) were all significant and in the predicted direction. Information and motivation varied with each other (r = 0.350, P < 0.001). Glycemic control can be incorporated into the IMB model. The utility of the modified model in the study population is validated. Type 2 diabetes mellitus patients with poor control of glucose levels may be a better target population for application of the modified IMB model. © 2018 Ruijin Hospital, Shanghai Jiaotong University School of Medicine and John Wiley & Sons Australia, Ltd.

A Cross-Cultural Comparison of Health Behaviors between Saudi and British Adolescents Living in Urban Areas: Gender by Country Analyses

PubMed Central

Al-Hazzaa, Hazzaa M.; Al-Nakeeb, Yahya; Duncan, Michael J.; Al-Sobayel, Hana I.; Abahussain, Nada A.; Musaiger, Abdulrahman O.; Lyons, Mark; Collins, Peter; Nevill, Alan

2013-01-01

This study investigated the cross-cultural differences and similarity in health behaviors between Saudi and British adolescents. A school-based cross-sectional study was conducted at four cities in Saudi Arabia (Riyadh and Al-Khobar; N = 1,648) and Britain (Birmingham and Coventry; N = 1,158). The participants (14–18 year-olds) were randomly selected using a multistage stratified cluster sampling technique. Measurements included anthropometric, screen time, validated physical activity (PA) questionnaire and dietary habits. The overweight/obesity prevalence among Saudi adolescents (38.3%) was significantly (p < 0.001) higher than that found among British adolescents (24.1%). The British adolescents demonstrated higher total PA energy expenditure than Saudi adolescents (means ± SE = 3,804.8 ± 81.5 vs. 2,219.9 ± 65.5 METs-min/week). Inactivity prevalence was significantly (p < 0.001) higher among Saudi adolescents (64%) compared with that of British adolescents (25.5%). The proportions of adolescents exceeding 2 h of daily screen time were high (88.0% and 90.8% among Saudis and British, respectively). The majority of Saudi and British adolescents did not have daily intakes of breakfast, fruit, vegetables and milk. MANCOVA showed significant (p < 0.05) gender by country interactions in several lifestyle factors. There was a significant (p < 0.001) gender differences in the ratio of physical activity to sedentary behaviors. In conclusion, Saudi and British adolescents demonstrated some similarities and differences in their PA levels, sedentary behaviors and dietary habits. Unhealthy lifestyle behaviors among adolescents appear to be a cross-cultural phenomenon. PMID:24300072

Burnout and health behaviors in health professionals from seven European countries.

PubMed

Alexandrova-Karamanova, Anna; Todorova, Irina; Montgomery, Anthony; Panagopoulou, Efharis; Costa, Patricia; Baban, Adriana; Davas, Asli; Milosevic, Milan; Mijakoski, Dragan

2016-10-01

Within an underlying health-impairing process, work stressors exhaust employees' mental and physical resources and lead to exhaustion/burnout and to health problems, with health-impairing behaviors being one of the potential mechanisms, linking burnout to ill health. The study aims to explore the associations between burnout and fast food consumption, exercise, alcohol consumption and painkiller use in a multinational sample of 2623 doctors, nurses and residents from Greece, Portugal, Bulgaria, Romania, Turkey, Croatia and Macedonia, adopting a cross-national approach. Data are part of the international cross-sectional quantitative ORCAB survey. The measures included the Maslach Burnout Inventory and the Health Behaviors Questionnaire. Burnout was significantly positively associated with higher fast food consumption, infrequent exercise, higher alcohol consumption and more frequent painkiller use in the full sample, and these associations remained significant after the inclusion of individual differences factors and country of residence. Cross-national comparisons showed significant differences in burnout and health behaviors, and some differences in the statistical significance and magnitude (but not the direction) of the associations between them. Health professionals from Turkey, Greece and Bulgaria reported the most unfavorable experiences. Burnout and risk health behaviors among health professionals are important both in the context of health professionals' health and well-being and as factors contributing to medical errors and inadequate patient safety. Organizational interventions should incorporate early identification of such behaviors together with programs promoting health and aimed at the reduction of burnout and work-related stress.

Semihard processes with BLM renormalization scale setting

DOE Office of Scientific and Technical Information (OSTI.GOV)

Caporale, Francesco; Ivanov, Dmitry Yu.; Murdaca, Beatrice

We apply the BLM scale setting procedure directly to amplitudes (cross sections) of several semihard processes. It is shown that, due to the presence of β{sub 0}-terms in the NLA results for the impact factors, the obtained optimal renormalization scale is not universal, but depends both on the energy and on the process in question. We illustrate this general conclusion considering the following semihard processes: (i) inclusive production of two forward high-p{sub T} jets separated by large interval in rapidity (Mueller-Navelet jets); (ii) high-energy behavior of the total cross section for highly virtual photons; (iii) forward amplitude of the productionmore » of two light vector mesons in the collision of two virtual photons.« less

Heat treatment effect on the mechanical properties of industrial drawn copper wires

NASA Astrophysics Data System (ADS)

Beribeche, Abdellatif; Boumerzoug, Zakaria; Ji, Vincent

2013-12-01

In this present investigation, the mechanical properties of industrial drawn copper wires have been studied by tensile tests. The effect of prior heat treatments at 500°C on the drawn wires behavior was the main goal of this investigation. We have found that the mechanical behavior of drawn wires depends strongly on those treatments. SEM observations of the wire cross section after tensile tests have shown that the mechanism of rupture was mainly controlled by the void formation.

NLO QCD corrections to B c( B*c) production around the Z pole at an e + e - collider

NASA Astrophysics Data System (ADS)

Zheng, XuChang; Chang, ChaoHsi; Feng, TaiFu; Pan, Zan

2018-03-01

The production of B c and B*c mesons at a Z-factory (an e + e - collider operating at energies around the Z pole) is calculated up to the next-to-leading order (NLO) QCD accuracy. The results show that the dependence of the total cross sections on the renormalization scale μ is suppressed by the corrections, and the NLO corrections enhance the total cross sections of B c by 52% and of B*c by 33% when the renormalization scale is taken at μ = 2 m b . To observe the various behaviors of the production of the mesons B c and B*c, such as the differential cross section vs. the out-going angle, the forward-backward asymmetry, and the distribution vs. the energy fraction z up to NLO QCD accuracy as well as the relevant K-factor (NLO to LO) for the production, are calculated, and it is pointed out that some of the observables obtained in the present work may be used as a specific precision test of the standard model.

Investigations of the valence-shell excitations of molecular ethane by high-energy electron scattering

NASA Astrophysics Data System (ADS)

Xu, Wei-Qing; Xu, Long-Quan; Qi, De-Guang; Chen, Tao; Liu, Ya-Wei; Zhu, Lin-Fan

2018-04-01

The differential cross sections and generalized oscillator strengths for the low-lying excitations of the valence-shell 1eg orbital electron in ethane have been measured for the first time at a high incident electron energy of 1500 eV and a scattering angular range of 1.5°-10°. A weak feature, termed X here, with a band center of about 7.5 eV has been observed, which was also announced by the previous experimental and theoretical studies. The dynamic behaviors of the generalized oscillator strengths for the 3s (8.7 eV), 3s+3p (9.31 eV, 9.41 eV), and X (˜7.5 eV) transitions on the momentum transfer squared have been obtained. The integral cross sections of these transitions from their thresholds to 5000 eV have been obtained with the aid of the BE-scaling (B is the binding energy and E is the excitation energy) method. The optical oscillator strengths of the above transitions determined by extrapolating their generalized oscillator strengths to the limit of the squared momentum transfer K2 → 0 are in good agreement with the ones from the photoabsorption spectrum [J. W. Au et al., Chem. Phys. 173, 209 (1993)], which indicates that the present differential cross sections, generalized oscillator strengths, and integral cross sections can serve as benchmark data.

Separated kaon electroproduction cross section and the kaon form factor from 6 GeV JLab data

DOE PAGES

Carmignotto, M.; Ali, S.; Aniol, K.; ...

2018-02-28

The 1H(e,e 'K +)Λ reaction was studied as a function of the Mandelstam variable -t using data from the E01-004 (FPI-2) and E93-018 experiments that were carried out in Hall C at the 6 GeV Jefferson Laboratory. The cross section was fully separated into longitudinal and transverse components, and two interference terms at four-momentum transfers Q 2 of 1.00, 1.36, and 2.07 GeV 2. The kaon form factor was extracted from the longitudinal cross section using the Regge model by Vanderhaeghen et al. [Phys. Rev. C 57, 1454 (1998)]. Here, the results establish the method, previously used successfully for pionmore » analyses, for extracting the kaon form factor. Data from 12 GeV Jefferson Laboratory experiments are expected to have sufficient precision to distinguish between theoretical predictions, for example, recent perturbative QCD calculations with modern parton distribution amplitudes. The leading-twist behavior for light mesons is predicted to set in for values of Q 2 between 5 and 10 GeV 2, which makes data in the few-GeV regime particularly interesting. Finally, the Q 2 dependence at fixed x and -t of the longitudinal cross section that we extracted seems consistent with the QCD factorization prediction within the experimental uncertainty.« less

Separated kaon electroproduction cross section and the kaon form factor from 6 GeV JLab data

DOE Office of Scientific and Technical Information (OSTI.GOV)

Carmignotto, M.; Ali, S.; Aniol, K.

The 1H(e,e 'K +)Λ reaction was studied as a function of the Mandelstam variable -t using data from the E01-004 (FPI-2) and E93-018 experiments that were carried out in Hall C at the 6 GeV Jefferson Laboratory. The cross section was fully separated into longitudinal and transverse components, and two interference terms at four-momentum transfers Q 2 of 1.00, 1.36, and 2.07 GeV 2. The kaon form factor was extracted from the longitudinal cross section using the Regge model by Vanderhaeghen et al. [Phys. Rev. C 57, 1454 (1998)]. Here, the results establish the method, previously used successfully for pionmore » analyses, for extracting the kaon form factor. Data from 12 GeV Jefferson Laboratory experiments are expected to have sufficient precision to distinguish between theoretical predictions, for example, recent perturbative QCD calculations with modern parton distribution amplitudes. The leading-twist behavior for light mesons is predicted to set in for values of Q 2 between 5 and 10 GeV 2, which makes data in the few-GeV regime particularly interesting. Finally, the Q 2 dependence at fixed x and -t of the longitudinal cross section that we extracted seems consistent with the QCD factorization prediction within the experimental uncertainty.« less

Separated kaon electroproduction cross section and the kaon form factor from 6 GeV JLab data

NASA Astrophysics Data System (ADS)

Carmignotto, M.; Ali, S.; Aniol, K.; Arrington, J.; Barrett, B.; Beise, E. J.; Blok, H. P.; Boeglin, W.; Brash, E. J.; Breuer, H.; Chang, C. C.; Christy, M. E.; Dittmann, A.; Ent, R.; Fenker, H.; Gaskell, D.; Gibson, E.; Holt, R. J.; Horn, T.; Huber, G. M.; Jin, S.; Jones, M. K.; Keppel, C. E.; Kim, W.; King, P. M.; Kovaltchouk, V.; Liu, J.; Lolos, G. J.; Mack, D. J.; Margaziotis, D. J.; Markowitz, P.; Matsumura, A.; Meekins, D.; Miyoshi, T.; Mkrtchyan, H.; Niculescu, G.; Niculescu, I.; Okayasu, Y.; Pegg, I. L.; Pentchev, L.; Perdrisat, C.; Potterveld, D.; Punjabi, V.; Reimer, P. E.; Reinhold, J.; Roche, J.; Sarty, A.; Smith, G. R.; Tadevosyan, V.; Tang, L. G.; Trotta, R.; Tvaskis, V.; Vargas, A.; Vidakovic, S.; Volmer, J.; Vulcan, W.; Warren, G.; Wood, S. A.; Xu, C.; Zheng, X.; JLAB FPI-2; E93-018 Collaboration

2018-02-01

The 1H(e ,e'K+ )Λ reaction was studied as a function of the Mandelstam variable -t using data from the E01-004 (FPI-2) and E93-018 experiments that were carried out in Hall C at the 6 GeV Jefferson Laboratory. The cross section was fully separated into longitudinal and transverse components, and two interference terms at four-momentum transfers Q2 of 1.00, 1.36, and 2.07 GeV2. The kaon form factor was extracted from the longitudinal cross section using the Regge model by Vanderhaeghen et al. [Phys. Rev. C 57, 1454 (1998), 10.1103/PhysRevC.57.1454]. The results establish the method, previously used successfully for pion analyses, for extracting the kaon form factor. Data from 12 GeV Jefferson Laboratory experiments are expected to have sufficient precision to distinguish between theoretical predictions, for example, recent perturbative QCD calculations with modern parton distribution amplitudes. The leading-twist behavior for light mesons is predicted to set in for values of Q2 between 5 and 10 GeV2, which makes data in the few-GeV regime particularly interesting. The Q2 dependence at fixed x and -t of the longitudinal cross section that we extracted seems consistent with the QCD factorization prediction within the experimental uncertainty.

3D Non-Woven Polyvinylidene Fluoride Scaffolds: Fibre Cross Section and Texturizing Patterns Have Impact on Growth of Mesenchymal Stromal Cells

PubMed Central

Schellenberg, Anne; Ross, Robin; Abagnale, Giulio; Joussen, Sylvia; Schuster, Philipp; Arshi, Annahit; Pallua, Norbert; Jockenhoevel, Stefan; Gries, Thomas; Wagner, Wolfgang

2014-01-01

Several applications in tissue engineering require transplantation of cells embedded in appropriate biomaterial scaffolds. Such structures may consist of 3D non-woven fibrous materials whereas little is known about the impact of mesh size, pore architecture and fibre morphology on cellular behavior. In this study, we have developed polyvinylidene fluoride (PVDF) non-woven scaffolds with round, trilobal, or snowflake fibre cross section and different fibre crimp patterns (10, 16, or 28 needles per inch). Human mesenchymal stromal cells (MSCs) from adipose tissue were seeded in parallel on these scaffolds and their growth was compared. Initial cell adhesion during the seeding procedure was higher on non-wovens with round fibres than on those with snowflake or trilobal cross sections. All PVDF non-woven fabrics facilitated cell growth over a time course of 15 days. Interestingly, proliferation was significantly higher on non-wovens with round or trilobal fibres as compared to those with snowflake profile. Furthermore, proliferation increased in a wider, less dense network. Scanning electron microscopy (SEM) revealed that the MSCs aligned along the fibres and formed cellular layers spanning over the pores. 3D PVDF non-woven scaffolds support growth of MSCs, however fibre morphology and mesh size are relevant: proliferation is enhanced by round fibre cross sections and in rather wide-meshed scaffolds. PMID:24728045

Self-efficacy, self-care behavior, anxiety, and depression in Taiwanese with type 2 diabetes: A cross-sectional survey.

PubMed

Wu, Shu-Fang Vivienne; Huang, Yi-Ching; Lee, Mei-Chen; Wang, Tsae-Jyy; Tung, Heng-Hsin; Wu, Meng-Ping

2013-06-01

The relationships between self-efficacy, self-care behavior, anxiety, and depression for Taiwanese individuals with type 2 diabetes were determined in this study. Depression and anxiety are common symptoms that can contribute toward adverse medical outcomes. A descriptive, cross-sectional, correlational design was used. The sample comprised 201 patients with type 2 diabetes from diabetes outpatient clinics at three teaching hospitals in Taiwan. The results of this study revealed that people with diabetes who had received diabetes health education, regularly made clinical visits, underwent treatment, and did not smoke demonstrated a high self-efficacy score (P < 0.05). Self-efficacy among people with diabetes positively correlated with illness duration (P < 0.05), treatment (P < 0.01), and self-care behavior (P < 0.01). Self-efficacy among people with diabetes negatively correlated with anxiety and depression (P < 0.01). Self-efficacy can be a predictor of anxiety and depression (P < 0.01). This study revealed that enhancing self-efficacy levels might reduce anxiety and depression. Self-efficacy-enhancing programs should be held regularly in clinical practices. Conducting psychological research on diabetes drives policy and healthcare system change. © 2012 Wiley Publishing Asia Pty Ltd.

Investigation of flood routing by a dynamic wave model in trapezoidal channels

NASA Astrophysics Data System (ADS)

Sulistyono, B. A.; Wiryanto, L. H.

2017-08-01

The problems of flood wave propagation, in bodies of waters, cause by intense rains or breaking of control structures, represent a great challenge in the mathematical modeling processes. This research concerns about the development and application of a mathematical model based on the Saint Venant's equations, to study the behavior of the propagation of a flood wave in trapezoidal channels. In these equations, the momentum equation transforms to partial differential equation which has two parameters related to cross-sectional area and discharge of the channel. These new formulas have been solved by using an explicit finite difference scheme. In computation procedure, after computing the discharge from the momentum equation, the cross-sectional area will be obtained from the continuity equation for a given point of channel. To evaluate the behavior of the control variables, several scenarios for the main channel as well as for flood waves are considered and different simulations are performed. The simulations demonstrate that for the same bed width, the peak discharge in trapezoidal channel smaller than in rectangular one at a specific distance along the channel length and so, that roughness coefficient and bed slope of the channel play a strong game on the behavior of the flood wave propagation.

CLAS g10 Analysis on Single Photopion Productions from Deuterium

NASA Astrophysics Data System (ADS)

Chen, Wei

2006-04-01

Photopion productions from nucleons are essential probes of the transition from meson-nucleon degrees of freedom to quark-gluon degrees of freedom in exclusive processes. The cross sections of these processes are also advantageous, for the investigation of the oscillatory behavior around the quark counting prediction, since they decrease relatively slower with energy compared with other photon-induced processes. Recent data from JLab experiment E94-104 [1,2] show dramatic change in the scaled differential cross-section from the γn ->&-circ;p and γp ->&+circ;n processes in the center of mass energy between 1.8 GeV to about 2.4 GeV. We are carrying out a CLAS approved analysis [3] of the JLab CLAS g10 data on the γn ->&-circ;p to investigate this dramatic behavior in much finer photon energy bins. Furthermore, the angular dependence of the scaling behavior for this process will also be studied in detail. We will report the status of the analysis in this presentation. References: [1] L.Y. Zhu et al., Phys. Rev. Lett. 91, 022003 (2003).[2] L.Y. Zhu et al., Phys. Rev. C 71, 044603 (2005); nucl-ex/0409018.[3] http://www.tunl.duke.edu/˜mep/clas/caapion.pdf

Self-weighing throughout adolescence and young adulthood: implications for well-being

PubMed Central

Pacanowski, Carly R; Loth, Katie A; Hannan, Peter J; Linde, Jennifer A; Neumark-Sztainer, Dianne R

2015-01-01

Objective This paper describes the prevalence of self-weighing in the transition period from adolescence to young adulthood and examines cross-sectional and longitudinal associations between self-weighing and weight status, psychological, and behavioral outcomes. Design Project EAT (Eating and Activity in Teens and Young Adults), a longitudinal cohort study that assessed variables 3 times over 10 years. Participants 1,868 adolescents and young adults. Main Outcome Measures weight, BMI, weight disparity, body satisfaction, weight concern, self-esteem, depression and unhealthy weight control behaviors. Analysis cross-sectional and longitudinal. Results Significant positive correlations were found at each time point between self-weighing and weight concern for both genders. Self-weighing was significantly inversely related to self-esteem at each time point in female participants. Increases in endorsement of self-weighing were significantly related to decreases in body satisfaction and self-esteem and increases in weight concern and depression in female participants; and increases in weight concern in male participants. Conclusions and Implications Findings suggest that self-weighing may not be an innocuous behavior for young people, particularly women. Interventions should assess potential harmful consequences of self-weighing in addition to any potential benefits. It may be appropriate for clinicians to ask about self-weighing, and if frequent, explore motivations, perceived benefits, and potential adverse correlates or consequences. PMID:26566095

Maternal responsivity in mothers of young children with Down syndrome.

PubMed

Sterling, Audra; Warren, Steven F

2014-10-01

The purpose of this study was to examine maternal responsivity and directive behaviors in mothers of children with Down syndrome (DS). Participants included 22 mothers with a young child with DS compared to 22 mothers of chronologically age-matched typically developing (TD) children using a cross-sectional design. The dyads participated in videotaped structured activities that were coded for responsive and directive behaviors. RESULTS indicated that the mothers of children with DS used a more facilitative style with the older children while these behaviors decreased with older children with TD; one directive behavior, request for behavioral comply, increased with the older children with DS. The mothers of children with DS adapted their parenting style to be facilitative of their children's linguistic development.

How are lung cancer risk perceptions and cigarette smoking related?-testing an accuracy hypothesis.

PubMed

Chen, Lei-Shih; Kaphingst, Kimberly A; Tseng, Tung-Sung; Zhao, Shixi

2016-10-01

Subjective risk perception is an important theoretical construct in the field of cancer prevention and control. Although the relationship between subjective risk perception and health behaviors has been widely studied in many health contexts, the causalities and associations between the risk perception of developing lung cancer and cigarette smoking have been inconsistently reported among studies. Such inconsistency may be from discrepancies between study designs (cross-sectional versus longitudinal designs) and the three hypotheses (i.e., the behavior motivation hypothesis, the risk reappraisals hypothesis, and the accuracy hypothesis) testing different underlying associations between risk perception and cigarette-smoking behaviors. To clarify this issue, as an initial step, we examined the association between absolute and relative risk perceptions of developing lung cancer and cigarette-smoking behaviors among a large, national representative sample of 1,680 U.S. adults by testing an accuracy hypothesis (i.e., people who smoke accurately perceived a higher risk of developing lung cancer). Data from the U.S. Health Information National Trends Survey (HINTS) were analyzed using logistic regression and multivariate linear regression to examine the associations between risk perception and cigarette-smoking behaviors among 1,680 U.S. adults. Findings from this cross-sectional survey suggest that absolute and relative risk perceptions were positively and significantly correlated with having smoked >100 cigarettes during lifetime and the frequency of cigarette smoking. Only absolute risk perception was significantly associated with the number of cigarettes smoked per day among current smokers. Because both absolute and relative risk perceptions are positively related to most cigarette-smoking behaviors, this study supports the accuracy hypothesis. Moreover, absolute risk perception might be a more sensitive measurement than relative risk perception for perceived lung cancer risk. Longitudinal research is needed in the future to investigate other types of risk perception-risk behavior hypotheses-the behavior motivation and the risk reappraisals hypotheses-among nationally representative samples to further examine the causations between risk perception of obtaining lung cancer and smoking behaviors.

Effect of residence on mothers' health care seeking behavior for common childhood illness in Northwest Ethiopia: a community based comparative cross--sectional study.

PubMed

Gelaw, Yalemzewod Assefa; Biks, Gashaw Andargie; Alene, Kefyalew Addis

2014-10-08

Children are at higher risk of acquiring infections and developing severe disease. This study assessed the health care seeking behavior and associated factors of urban and rural mothers for common childhood illness in Northwest Ethiopia. A comparative community based cross-sectional study was conducted among urban and rural mothers living in the district. A multistage sampling technique was used to select the study participants. A pre-tested and structured questioner via interview was used to collect the data. Binary logistic regression analysis was used to identify associated factors. Odds ratio with 95% CI was computed to assess the strength of the associations. A total of 827 (274 urban and 553 rural) mothers were interviewed. Among these, 79.3% (95% CI: (76.5%, 82.06%)) of the mothers were sought health care in the district. Health care seeking behavior was higher among urban mothers (84.6%) than rural mothers (76.7%). Marital status, completion health extension package, and sex of child were significantly associated with health care seeking behavior of urban mothers. Whereas age of child, age and occupation of mothers, educational level of fathers, wealth quintile, and type of reported illness were significantly associated with rural mothers. Perceived severity of illness was significantly associated with both urban and rural mothers for health care seeking behavior. The overall health seeking behaviors of mothers for common childhood illness was high. However, urban mothers seek health care more than rural. Socio Economic position and types of reported illness has an effect for health seeking behavior of rural mothers. Whereas child sex preference and graduation status for health extension package has an effect for health care seeking behavior of urban mothers. Work on strengthen accessibility of health care services in the rural mothers and increase awareness of mothers about the disadvantage of sex preferences will improve the health care seek behavior of families regardless of the severity of illness and types of illnesses.

Tobacco Use and Cessation Behavior Among Adolescents Participating in Organized Sports

ERIC Educational Resources Information Center

Castrucci, Brian C.; Gerlach, Karen K.; Kaufman, Nancy J.; Orleans, C. Tracy

2004-01-01

Objectives: To examine the difference in tobacco use between adolescents who participate in organized sports and those who do not. Methods: Using a cross-sectional study design, this study uses data from a nationally representative sample of adolescents enrolled in public high schools in the United States. Results: Those participating in organized…

Activation and Self-Efficacy in a Randomized Trial of a Depression Self-Care Intervention

ERIC Educational Resources Information Center

McCusker, Jane; Lambert, Sylvie D.; Cole, Martin G.; Ciampi, Antonio; Strumpf, Erin; Freeman, Ellen E.; Belzile, Eric

2016-01-01

Objectives: In a sample of primary care participants with chronic physical conditions and comorbid depressive symptoms: to describe the cross-sectional and longitudinal associations of activation and self-efficacy with demographic, physical and mental health status, health behaviors, depression self-care, health care utilization, and use of…

Infants' Emotion Expressions to Acute Pain: Developmental Change and Stability of Individual Differences.

ERIC Educational Resources Information Center

Izard, Carroll E.; And Others

1987-01-01

A longitudinal study addressed the question of stability of individual expressive behaviors and replicated the basic findings of a cross-sectional study. Subjects were 25 infants for whom videotape records were available of four diptheria-pertussis-tetanus (DPT) inocculations scheduled at roughly 2, 4, 6, and 18 months. (Author/RH)

Managerial and Organizational Career Development: An Annotated Bibliography.

ERIC Educational Resources Information Center

Maddox, E. Nick; And Others

1988-01-01

This annotated bibliography is an extension of an earlier work published in the "Career Planning and Adult Development Journal" in 1983. It represents a cross-sectional look at the expanding field of career development as it relates to organizational behavior and human resource management disciplines and practice. Citations are included of 295…

Sexual Orientation, Weight Concerns, and Eating-Disordered Behaviors in Adolescent Girls and Boys.

ERIC Educational Resources Information Center

Austin, S. Bryn; Ziyadeh, Najat; Kahn, Jessica A.; Camargo, Carlos A.; Colditz, Graham A.; Field, Alison E.

2004-01-01

Objective: To examine sexual orientation group differences in eating disorder symptoms in adolescent girls and boys. Method: Cross-sectional associations were examined using multivariate regression techniques using data gathered in 1999 from 10,583 adolescents in the Growing Up Today Study, a cohort of children of women participating in the…

Linking Teacher Competences to Organizational Citizenship Behaviour: The Role of Empowerment

ERIC Educational Resources Information Center

Kasekende, Francis; Munene, John C.; Otengei, Samson Omuudu; Ntayi, Joseph Mpeera

2016-01-01

Purpose: The purpose of this paper is to examine relationship between teacher competences and organizational citizenship behavior (OCB) with empowerment as a mediating factor. Design/methodology/approach: The study took a cross-sectional descriptive and analytical design. Using cluster and random sampling procedures, data were obtained from 383…

Brief Report: A Longitudinal Study of Excessive Smiling and Laughing in Children with Angelman Syndrome

ERIC Educational Resources Information Center

Adams, Dawn; Horsler, Kate; Mount, Rebecca; Oliver, Chris

2015-01-01

Elevated laughing and smiling is a key characteristic of the Angelman syndrome behavioral phenotype, with cross-sectional studies reporting changes with environment and age. This study compares levels of laughing and smiling in 12 participants across three experimental conditions [full social interaction (with eye contact), social interaction with…

The Impact of Family Violence, Family Functioning, and Parental Partner Dynamics on Korean Juvenile Delinquency

ERIC Educational Resources Information Center

Kim, Hyun-Sil; Kim, Hun-Soo

2008-01-01

The present study was aimed at determining the family factors related to juvenile delinquency and identifying the effect of family violence, family functioning, parental partner dynamics, and adolescents' personality on delinquent behavior among Korean adolescents. A cross-sectional study was performed using an anonymous, self-reporting…

Association between Travel Times and Food Procurement Practices among Female Supplemental Nutrition Assistance Program Participants in Eastern North Carolina

ERIC Educational Resources Information Center

Jilcott, Stephanie B.; Moore, Justin B.; Wall-Bassett, Elizabeth D.; Liu, Haiyong; Saelens, Brian E.

2011-01-01

Objective: To examine associations between self-reported vehicular travel behaviors, perceived stress, food procurement practices, and body mass index among female Supplemental Nutrition Assistance Program (SNAP) participants. Analysis: The authors used correlation and regression analyses to examine cross-sectional associations between travel time…

Factors Associated with Screen Time among School-Age Children in Korea

ERIC Educational Resources Information Center

Ham, Ok Kyung; Sung, Kyung Mi; Kim, Hee Kyung

2013-01-01

The purpose of this study was to investigate the association of sociodemographic, psychosocial, and behavioral characteristics with screen time among school-age children in Korea. This study employed a nonexperimental, cross-sectional study design. A total of 370 children attending four elementary schools participated in the study. Self-report…

African-American Males' Health Perceptions and Knowledge

ERIC Educational Resources Information Center

McNeal, CoSandra; Perkins, Isaac; Lyons, Shenia

2006-01-01

Research on African American men's health is limited. Perception and knowledge of health may have a significant effect on health seeking behavior and self care. This study was designed to examine factors that may influence health perception and knowledge among African American males. This is a cross-sectional study of 343 African American males…

Domains of Risk in the Developmental Continuity of Fire Setting

ERIC Educational Resources Information Center

McCarty, Carolyn A.; McMahon, Robert J.

2005-01-01

Juvenile fire setting is a serious, dangerous, and costly behavior. The majority of research examining youth fire setting has been cross-sectional. We sought to examine early risk attributes that could differentiate fire setters from non-fire setters, in addition to examining their association with the developmental continuity of fire-setting…

Review of the Literature Regarding the Short- and Long-Term Consequences of Corporal Punishment on Children.

ERIC Educational Resources Information Center

Cheng, Karen O.

Controversies continue regarding the effects of corporal punishment on children. Research has demonstrated an association between levels of corporal punishment and negative outcome behaviors such as aggression and other mental health problems. However, most of these studies have been cross-sectional and correlational in design, thereby precluding…

Exploration of Social Cognitive Factors Associated with Physical Activity among Chinese-American Children

ERIC Educational Resources Information Center

Zhang, Yan; DeBate, Rita DiGioacchino

2006-01-01

This study examined the social cognitive factors associated with participation in physical activity among Chinese-American youth. Utilizing an observational cross-sectional design, data were collected via a self-administered survey from 84 Chinese-American children ages 6-18. The survey employed items from the Health Behavior Questionnaire and the…

Using the Health Belief Model to Predict Bystander Behavior among College Students

ERIC Educational Resources Information Center

Blavos, Alexis A.; Glassman, Tavis; Sheu, Jiunn-Jye; Diehr, Aaron; Deakins, Bethany

2014-01-01

This investigation used the Health Belief Model (HBM) to examine perceived barriers and benefits college students hold concerning medical amnesty. Researchers employed a cross-sectional research design with 369 students completing the survey (97% response rate). A path analysis revealed that college students are more likely to seek help during an…

Determinants of Low-Fat Eating Behaviors among Midlife African American Women

ERIC Educational Resources Information Center

Evans, Gina L.; McNeil, Lorna H.; Laufman, Larry; Bowman, Sharon L.

2009-01-01

Objective: The purpose of this study was to explore midlife African American women's low-fat eating habits in the context of health attitudes, social support, and food preferences. Design: A cross-sectional design was used. Settings: One Midwestern and 1 national African American women's organization were targeted for data collection.…

Developmental Trajectories of Bullying and Social Dominance in Youth

ERIC Educational Resources Information Center

Reijntjes, Albert; Vermande, Marjolijn; Goossens, Frits A.; Olthof, Tjeert; van de Schoot, Rens; Aleva, Liesbeth; van der Meulen, Matty

2013-01-01

Objective: Bullying is increasingly conceptualized as strategic behavior motivated by a desire to gain social dominance in the peer group. Cross-sectional research has shown that relative to their peers bullies are higher in social dominance as indexed by resource control, and are often perceived as powerful and "cool." However, research examining…

Financial Socialization of First-Year College Students: The Roles of Parents, Work, and Education

ERIC Educational Resources Information Center

Shim, Soyeon; Barber, Bonnie L.; Card, Noel A.; Xiao, Jing Jian; Serido, Joyce

2010-01-01

This cross-sectional study tests a conceptual financial socialization process model, specifying four-levels that connect anticipatory socialization during adolescence to young adults' current financial learning, to their financial attitudes, and to their financial behavior. A total of 2,098 first-year college students (61.9% females) participated…

Interagency Collaboration with High-Risk Gang Youth.

ERIC Educational Resources Information Center

Okamoto, Scott K.

This article describes the results of a study on interagency collaboration required to make major systemic changes in order to address the needs of emotionally and behaviorally disturbed youth. Interviews were conducted with practitioners from a cross-section of agencies that worked with high-risk gang youth. The intent was to examine both the…

The Development of Menstrual-Related Beliefs and Behaviors during Early Adolescence.

ERIC Educational Resources Information Center

Brooks-Gunn, Jeanne; Ruble, Diane N.

1982-01-01

A cross-sectional and a longitudinal study were conducted to answer questions about (1) the development and nature of premenstrual adolescent girls' expectations about menstrual symptoms, (2) expectations for and beliefs about menstrual symptoms as they relate to the actual experience of menarche, and (3) sources of information about menstruation…

Sex and Self-Control Theory: The Measures and Causal Model May Be Different

ERIC Educational Resources Information Center

Higgins, George E.; Tewksbury, Richard

2006-01-01

This study examines the distribution differences across sexes in key measures of self-control theory and differences in a causal model. Using cross-sectional data from juveniles ("n" = 1,500), the study shows mean-level differences in many of the self-control, risky behavior, and delinquency measures. Structural equation modeling…

Temperament and Early Stuttering Development: Cross-Sectional Findings from a Community Cohort

ERIC Educational Resources Information Center

Kefalianos, Elaina; Onslow, Mark; Ukoumunne, Obioha C.; Block, Susan; Reilly, Sheena

2017-01-01

Purpose: The purpose of this study was to ascertain if there is an association between stuttering severity and behaviors and the expression of temperament characteristics, including precursors of anxiety. Method: We studied temperament characteristics of a prospectively recruited community cohort of children who stutter (N = 173) at ages 3, 4, and…

Racial and Ethnic Disparities in Police-Reported Intimate Partner Violence Perpetration: A Mixed Methods Approach

ERIC Educational Resources Information Center

Lipsky, Sherry; Cristofalo, Meg; Reed, Sarah; Caetano, Raul; Roy-Byrne, Peter

2012-01-01

The objectives of this study were to examine racial and ethnic disparities in perpetrator and incident characteristics and discrepancies between police charges and reported perpetrator behaviors in police-reported intimate partner violence (IPV). This cross-sectional study used standardized police data and victim narratives of IPV incidents…

A Physics-Based Engineering Methodology for Calculating Soft Error Rates of Bulk CMOS and SiGe Heterojunction Bipolar Transistor Integrated Circuits

NASA Astrophysics Data System (ADS)

Fulkerson, David E.

2010-02-01

This paper describes a new methodology for characterizing the electrical behavior and soft error rate (SER) of CMOS and SiGe HBT integrated circuits that are struck by ions. A typical engineering design problem is to calculate the SER of a critical path that commonly includes several circuits such as an input buffer, several logic gates, logic storage, clock tree circuitry, and an output buffer. Using multiple 3D TCAD simulations to solve this problem is too costly and time-consuming for general engineering use. The new and simple methodology handles the problem with ease by simple SPICE simulations. The methodology accurately predicts the measured threshold linear energy transfer (LET) of a bulk CMOS SRAM. It solves for circuit currents and voltage spikes that are close to those predicted by expensive 3D TCAD simulations. It accurately predicts the measured event cross-section vs. LET curve of an experimental SiGe HBT flip-flop. The experimental cross section vs. frequency behavior and other subtle effects are also accurately predicted.

Time-lagged relationships between leadership behaviors and psychological distress after a workplace terrorist attack.

PubMed

Birkeland, Marianne Skogbrott; Nielsen, Morten Birkeland; Knardahl, Stein; Heir, Trond

2016-05-01

The impact of leadership practices on employee health may be especially evident after extreme events that have physical, psychological, or material consequences for the members of an organization. In this prospective study, we aimed to examine the association between leadership behavior and psychological distress in employees who had experienced a workplace terror attack. Ten and 22 months after the 2011 Oslo bombing attack targeting their workplace, ministerial employees (n = 2272) responded to a questionnaire assessing fair, empowering, supportive, and laissez-faire leadership, as well as psychological distress. Cross-sectional and time-lagged associations between the constructs were tested using structural equation modeling. Cross-sectionally, higher levels of supportive leadership were associated with lower levels of psychological distress. Longitudinally, negative relationships were found between psychological distress and subsequent ratings of fair and empowering leadership. Supportive leadership was associated with employees' psychological health after trauma, but seems not to have long-term effects on subsequent psychological distress. Rather, psychological distress may lead the employees to perceive their leaders as more negative across time.

Correlates of mammography utilization among working Muslim Iranian women.

PubMed

Hatefnia, Effat; Niknami, Shamsaddin; Bazargan, Mohsen; Mahmoodi, Mahmood; Lamyianm, Minoor; Alavi, Nasrien

2010-06-01

Most countries in Middle East have been successful in establishing and furthering basic facilities for screening, diagnosis, and treatment of breast cancer. The rate of compliance with mammography screening, however, remains well below North American and Western European countries. We utilized the Health Belief Model (HBM) to explore factors associated with mammography screening behavior among a sample of 320 Muslim women aged > or = 35. Carrying out this cross-sectional study, we found that screening behavior was associated with older age, higher perceived benefit of breast cancer screening, and lower perceived barrier. Additionally, we demonstrate the importance of religious beliefs in influencing mammography screening behavior and explaining the link between religious involvement and mammography behavior.

Does the perception that God controls health outcomes matter for health behaviors?

PubMed

Karvinen, Kristina H; Carr, Lucas J

2014-04-01

The purpose of this study was to examine the associations between God Locus of Health Control, health behaviors, and beliefs utilizing a cross-sectional online survey (N = 549). Results indicated that God Locus of Health Control was correlated with alcohol use, physical activity, perceived risk of chronic disease, and beliefs that poor health behaviors contribute to chronic disease (all p values < .05). Multiple regression analyses including covariates and other locus of control variables revealed that God Locus of Health Control was only an independent correlate of the belief that physical inactivity contributed to chronic disease. Insights from this study may be important for future faith-based health behavior change interventions.

Dietary Patterns and Their Socioeconomic and Behavioral Determinants in 6- to 8-Year-Old Portuguese Children.

PubMed

Rodrigues, D; Muc, M; Rodrigues, P R M; Pinto, A Mota; Padez, C

2016-01-01

Adherence to a healthier diet is declining, with children consuming more saturated fats and simple carbohydrates. Factors influencing this choice were studied using a cross-sectional study with children (6 to 8 years old) living in Coimbra. Socioeconomic and behavioral factors were obtained from the parents. Dietary patterns of 1,063 children were identified: Mediterranean (MedDiet), saturated fats (SFatDiet), and base of Portuguese diet (BPDiet). Their relationship with socioeconomic and behavioral determinants was analyzed. SES determined strongly the dietary choices with lower SES being associated with higher consumption of SFatDiet and higher SES with BPDiet. Worse diet quality was shown to coexist with other unhealthy behaviors.

Systematic determination of absolute absorption cross-section of individual carbon nanotubes

PubMed Central

Liu, Kaihui; Hong, Xiaoping; Choi, Sangkook; Jin, Chenhao; Capaz, Rodrigo B.; Kim, Jihoon; Wang, Wenlong; Bai, Xuedong; Louie, Steven G.; Wang, Enge; Wang, Feng

2014-01-01

Optical absorption is the most fundamental optical property characterizing light–matter interactions in materials and can be most readily compared with theoretical predictions. However, determination of optical absorption cross-section of individual nanostructures is experimentally challenging due to the small extinction signal using conventional transmission measurements. Recently, dramatic increase of optical contrast from individual carbon nanotubes has been successfully achieved with a polarization-based homodyne microscope, where the scattered light wave from the nanostructure interferes with the optimized reference signal (the reflected/transmitted light). Here we demonstrate high-sensitivity absorption spectroscopy for individual single-walled carbon nanotubes by combining the polarization-based homodyne technique with broadband supercontinuum excitation in transmission configuration. To our knowledge, this is the first time that high-throughput and quantitative determination of nanotube absorption cross-section over broad spectral range at the single-tube level was performed for more than 50 individual chirality-defined single-walled nanotubes. Our data reveal chirality-dependent behaviors of exciton resonances in carbon nanotubes, where the exciton oscillator strength exhibits a universal scaling law with the nanotube diameter and the transition order. The exciton linewidth (characterizing the exciton lifetime) varies strongly in different nanotubes, and on average it increases linearly with the transition energy. In addition, we establish an empirical formula by extrapolating our data to predict the absorption cross-section spectrum for any given nanotube. The quantitative information of absorption cross-section in a broad spectral range and all nanotube species not only provides new insight into the unique photophysics in one-dimensional carbon nanotubes, but also enables absolute determination of optical quantum efficiencies in important photoluminescence and photovoltaic processes. PMID:24821815

Systematic determination of absolute absorption cross-section of individual carbon nanotubes.

PubMed

Liu, Kaihui; Hong, Xiaoping; Choi, Sangkook; Jin, Chenhao; Capaz, Rodrigo B; Kim, Jihoon; Wang, Wenlong; Bai, Xuedong; Louie, Steven G; Wang, Enge; Wang, Feng

2014-05-27

Optical absorption is the most fundamental optical property characterizing light-matter interactions in materials and can be most readily compared with theoretical predictions. However, determination of optical absorption cross-section of individual nanostructures is experimentally challenging due to the small extinction signal using conventional transmission measurements. Recently, dramatic increase of optical contrast from individual carbon nanotubes has been successfully achieved with a polarization-based homodyne microscope, where the scattered light wave from the nanostructure interferes with the optimized reference signal (the reflected/transmitted light). Here we demonstrate high-sensitivity absorption spectroscopy for individual single-walled carbon nanotubes by combining the polarization-based homodyne technique with broadband supercontinuum excitation in transmission configuration. To our knowledge, this is the first time that high-throughput and quantitative determination of nanotube absorption cross-section over broad spectral range at the single-tube level was performed for more than 50 individual chirality-defined single-walled nanotubes. Our data reveal chirality-dependent behaviors of exciton resonances in carbon nanotubes, where the exciton oscillator strength exhibits a universal scaling law with the nanotube diameter and the transition order. The exciton linewidth (characterizing the exciton lifetime) varies strongly in different nanotubes, and on average it increases linearly with the transition energy. In addition, we establish an empirical formula by extrapolating our data to predict the absorption cross-section spectrum for any given nanotube. The quantitative information of absorption cross-section in a broad spectral range and all nanotube species not only provides new insight into the unique photophysics in one-dimensional carbon nanotubes, but also enables absolute determination of optical quantum efficiencies in important photoluminescence and photovoltaic processes.

Association between Self-Reported Academic Performance and Risky Sexual Behavior among Ugandan University Students- A Cross Sectional Study

PubMed Central

Mehra, Devika; Kyagaba, Emmanuel; Östergren, Per-Olof; Agardh, Anette

2014-01-01

Little is known about the association between self-reported academic performance and risky sexual behaviors and if this differs by gender, among university students. Academic performance can create psychological pressure in young students. Poor academic performance might thus potentially contribute to risky sexual behavior among university students. The aim of this study was to investigate the association between self-reported academic performance and risky sexual behaviors, and whether gender affects this relationship among Ugandan university students. In 2010, 1,954 students participated in a cross-sectional survey, conducted at Mbarara University of Science and Technology in southwestern Uganda (72% response rate). Multivariate logistic regression analysis was used for the analysis. 1,179 (60.3%) students in our study sample reported having debuted sexually. Of these 440 (42.2%) used condoms inconsistently with new sexual partners, and 344 (33.6%) had had multiple sexual partners. We found a statistically significant association between poor academic performance and inconsistent condom use with a new sex partner and this association remained significant even after adjusting for all the potential confounders. There was no such association detected regarding multiple sexual partners. We also found that gender modified the effect of poor academic performance on inconsistent condom use. Females, who were poor academic performers, were found to be at a higher risk of inconsistent condom use than their male counterparts. Interventions should be designed to provide extra support to poor academic performers, which may improve their performance and self-esteem, which in turn might reduce their risky sexual behaviors. PMID:24999121

Association between self-reported academic performance and risky sexual behavior among Ugandan university students- a cross sectional study.

PubMed

Mehra, Devika; Kyagaba, Emmanuel; Ostergren, Per-Olof; Agardh, Anette

2014-04-16

Little is known about the association between self-reported academic performance and risky sexual behaviors and if this differs by gender, among university students. Academic performance can create psychological pressure in young students. Poor academic performance might thus potentially contribute to risky sexual behavior among university students. The aim of this study was to investigate the association between self-reported academic performance and risky sexual behaviors, and whether gender affects this relationship among Ugandan university students. In 2010, 1,954 students participated in a cross-sectional survey, conducted at Mbarara University of Science and Technology in southwestern Uganda (72% response rate). Multivariate logistic regression analysis was used for the analysis. 1,179 (60.3%) students in our study sample reported having debuted sexually. Of these 440 (42.2%) used condoms inconsistently with new sexual partners, and 344 (33.6%) had had multiple sexual partners. We found a statistically significant association between poor academic performance and inconsistent condom use with a new sex partner and this association remained significant even after adjusting for all the potential confounders. There was no such association detected regarding multiple sexual partners. We also found that gender modified the effect of poor academic performance on inconsistent condom use. Females, who were poor academic performers, were found to be at a higher risk of inconsistent condom use than their male counterparts. Interventions should be designed to provide extra support to poor academic performers, which may improve their performance and self-esteem, which in turn might reduce their risky sexual behaviors.

Age of alcohol use initiation, suicidal behavior, and peer and dating violence victimization and perpetration among high-risk, seventh-grade adolescents.

PubMed

Swahn, Monica H; Bossarte, Robert M; Sullivent, Ernest E

2008-02-01

We examined the cross-sectional associations between reports of an early age of alcohol use initiation and suicidal ideation, suicide attempts, and peer and dating violence victimization and perpetration among high-risk adolescents. Data were obtained from the Youth Violence Survey conducted in 2004 and administered to all public school students enrolled in grades 7, 9, and 11/12 (N = 4131) in a high-risk school district in the United States. Our analyses were limited to seventh-grade students who either began drinking before the age of 13 or were nondrinkers, with complete information on all covariates (n = 856). Cross-sectional logistic and multinomial logistic regression analyses were conducted to determine the associations between early alcohol use and each of the 6 outcome behaviors (dating violence victimization and perpetration, peer violence victimization and perpetration, suicidal ideation, and suicide attempts) while controlling for demographic characteristics and other potential confounders (ie, heavy episodic drinking, substance use, peer drinking, depression, impulsivity, peer delinquency, and parental monitoring). In our study, 35% of students reported alcohol use initiation before 13 years of age (preteen alcohol use initiators). Students who reported preteen alcohol use initiation reported involvement in significantly more types of violent behaviors (mean: 2.8 behaviors), compared with nondrinkers (mean: 1.8 behaviors). Preteen alcohol use initiation was associated significantly with suicide attempts, relative to nondrinkers, controlling for demographic characteristics and all other potential confounders. Early alcohol use is an important risk factor for involvement in violent behaviors and suicide attempts among youths. Increased efforts to delay and to reduce early alcohol use among youths are needed and may reduce both violence and suicide attempts.

Theory of Planned Behavior Constructs Associated with Nurses' Pain Assessment and Pro Re Nata (PRN) Opioid Analgesic Administration: A Cross-sectional Study.

PubMed

Youngcharoen, Phichpraorn; Vincent, Catherine; Park, Chang G

2017-06-01

Little theory-based research has been performed to better understand nurses' perceptions of pain management. Framed by the theory of planned behavior, the aims of the study were to describe nurses' beliefs (behavioral, normative, and control) about pain management for hospitalized elderly patients with postoperative pain; to present an item analysis for beliefs, attitudes, perceived norms, perceived behavioral control, intentions, and behaviors (measured in case study vignettes) for nurses (a) with different durations of nursing experience, (b) working in university, public health, and military hospitals, and (c) who either had or had not received pain management training in the past six months; and to compare differences in the constructs across these three groups. A comparative descriptive cross-sectional design was used with a convenience sample of 140 Thai nurses working in three Bangkok hospitals. Participants responded to pain assessment and management questionnaires. Most nurses expressed fairly strong beliefs about pain assessment and pro re nata (PRN) opioid analgesic administration. Nurses with more than 10 years of experience had the highest scores for attitudes toward pain assessment and perceptions of others' expectations about PRN opioid analgesic administration. Responses of nurses working in different types of hospitals indicated significantly different pain assessment and PRN opioid analgesic administration behaviors. No significant differences were found for nurses who did and did not receive pain management training. The study highlighted the need for improved pain management education for nurses to enhance the quality of patient care. Copyright © 2017 American Society for Pain Management Nursing. Published by Elsevier Inc. All rights reserved.

Antipsychotics and dementia in Canada: a retrospective cross-sectional study of four health sectors.

PubMed

Rios, Sebastian; Perlman, Christopher M; Costa, Andrew; Heckman, George; Hirdes, John P; Mitchell, Lori

2017-10-23

Antipsychotic medications are not recommended for the management of symptoms of dementia, particularly among persons with no behavioral or psychological symptoms. We examine patterns of antipsychotic medication use among persons with dementia across health sectors in Canada, with a focus on factors related to use among those without behavioral or psychotic symptoms. Using a retrospective cross-sectional design, this study examines antipsychotic use among adults aged 65 or older with dementia in home care (HC), complex continuing care (CCC), long-term care (LTC), and among alternate level care patients in acute hospitals (ALC). Using clinical data from January 1, 2009 to December 31, 2014, the prevalence of antipsychotic medication use was estimated by the presence of behavioral and psychotic symptoms. Logistic regression was used to identify sector specific factors associated with antipsychotic use in the absence of behavioral and psychotic symptoms. The total prevalence of antipsychotic use among older adults with dementia was 26% in HC, 54% in ALC, 41% in CCC, and 48% in LTC. This prevalence ranged from 38% (HC) to 73% (ALC) for those with both behavioral and psychotic symptoms and from 15% (HC) to 31% (ALC) among those with no symptoms. The regression models identified a number of variables were related to antipsychotic use in the absence of behavior or psychotic symptoms, such as bipolar disorder (OR = 6.63 in CCC; OR = 5.52 in LTC), anxious complaints (OR = 1.54 in LTC to 2.01 in CCC), and wandering (OR = 1.83 in ALC). Potentially inappropriate use of antipsychotic medications is prevalent among older adults with dementia across health sectors. The variations in prevalence observed from community to facility based care suggests that system issues may exist in appropriately managing persons with dementia.

Water-hammer pressure waves interaction at cross-section changes in series in viscoelastic pipes

NASA Astrophysics Data System (ADS)

Meniconi, S.; Brunone, B.; Ferrante, M.

2012-08-01

In view of scarcity of both experimental data and numerical models concerning transient behavior of cross-section area changes in pressurized liquid flow, the paper presents laboratory data and numerical simulation of the interaction of a surge wave with a partial blockage by a valve, a single pipe contraction or expansion and a series of pipe contraction/expansion in close proximity.With regard to a single change of cross-section area, laboratory data point out the completely different behavior with respect to one of the partially closed in-line valves with the same area ratio. In fact, for the former the pressure wave interaction is not regulated by the steady-state local head loss. With regard to partial blockages, transient tests have shown that the smaller the length, the more intense the overlapping of pressure waves due to the expansion and contraction in series.Numerically, the need for taking into account both the viscoelasticity and unsteady friction is demonstrated, since the classical water-hammer theory does not simulate the relevant damping of pressure peaks and gives rise to a time shifting between numerical and laboratory data. The transient behavior of a single local head loss has been checked by considering tests carried out in a system with a partially closed in-line valve. As a result, the reliability of the quasi steady-state approach for local head loss simulation has been demonstrated in viscoelastic pipes. The model parameters obtained on the basis of transients carried out in single pipe systems have then been used to simulate transients in the more complex pipe systems. These numerical experiments show the great importance of the length of the small-bore pipe with respect to one of the large-bore pipes. Precisely, until a gradually flow establishes in the small-bore pipe, the smaller such a length, the better the quality of the numerical simulation.

Social, behavioral, and sleep characteristics associated with depression symptoms among undergraduate students at a women's college: a cross-sectional depression survey, 2012.

PubMed

Wilson, Katherine T; Bohnert, Ashley E; Ambrose, Alex; Davis, Destiny Y; Jones, Dina M; Magee, Matthew J

2014-01-13

The association between student characteristics and depression among students attending women's colleges (single-sex institutions of higher education that exclude or limit males from admission) is poorly understood. Our objective was to estimate the prevalence of depression and determine behavioral and social characteristics associated with depression among students attending a women's college. We administered a cross-sectional Internet-based survey between April and May 2012 to students (n = 277) enrolled at a private women's college in the southeastern US. Center for Epidemiologic Studies Depression (CES-D) and Depression Anxiety Stress Scale 21 (DASS-21) instruments measured self-reported depression. Bivariate and multivariable logistic regression methods were used to estimate adjusted associations. Prevalence of depression measured by CES-D and DASS-21 instruments was 26.3% (95% confidence interval [CI] 20.8-32.3%) and 26.0% (95% CI 20.4-32.3%), respectively. After adjusting for confounders, absence of strong social support (prevalence odds ratio [OR] = 4.3, 95% CI 1.4-13.7), history of mental health disorder (OR = 4.8 95% CI 1.9-12.4), and poor sleep hygiene (OR = 2.8, 95% CI 1.3-5.8) were associated with depression. This cross-sectional survey identified absence of strong social support, history of mental health disorder, and poor sleep hygiene as potential predictors of depression among students attending a women's college. Further investigation of these factors may inform depression interventions for students attending women's colleges and other undergraduate student populations.

Vector scattering analysis of TPF coronagraph pupil masks

NASA Astrophysics Data System (ADS)

Ceperley, Daniel P.; Neureuther, Andrew R.; Lieber, Michael D.; Kasdin, N. Jeremy; Shih, Ta-Ming

2004-10-01

Rigorous finite-difference time-domain electromagnetic simulation is used to simulate the scattering from proto-typical pupil mask cross-section geometries and to quantify the differences from the normally assumed ideal on-off behavior. Shaped pupil plane masks are a promising technology for the TPF coronagraph mission. However the stringent requirements placed on the optics require that the detailed behavior of the edge-effects of these masks be examined carefully. End-to-end optical system simulation is essential and an important aspect is the polarization and cross-section dependent edge-effects which are the subject of this paper. Pupil plane masks are similar in many respects to photomasks used in the integrated circuit industry. Simulation capabilities such as the FDTD simulator, TEMPEST, developed for analyzing polarization and intensity imbalance effects in nonplanar phase-shifting photomasks, offer a leg-up in analyzing coronagraph masks. However, the accuracy in magnitude and phase required for modeling a chronograph system is extremely demanding and previously inconsequential errors may be of the same order of magnitude as the physical phenomena under study. In this paper, effects of thick masks, finite conductivity metals, and various cross-section geometries on the transmission of pupil-plane masks are illustrated. Undercutting the edge shape of Cr masks improves the effective opening width to within λ/5 of the actual opening but TE and TM polarizations require opposite compensations. The deviation from ideal is examined at the reference plane of the mask opening. Numerical errors in TEMPEST, such as numerical dispersion, perfectly matched layer reflections, and source haze are also discussed along with techniques for mitigating their impacts.

Children's sleep and autonomic function: low sleep quality has an impact on heart rate variability.

PubMed

Michels, Nathalie; Clays, Els; De Buyzere, Marc; Vanaelst, Barbara; De Henauw, Stefaan; Sioen, Isabelle

2013-12-01

Short sleep duration and poor sleep quality in children have been associated with concentration, problem behavior, and emotional instability, but recently also with disrupted autonomic nervous function, which predicts cardiovascular health. Heart rate variability (HRV) was used as noninvasive indicator of autonomic function to examine the influence of sleep. Cross-sectional and longitudinal observational study on the effect of sleep on HRV. Belgian children (5-11 years) of the ChiBS study in 2010 (N = 334) and 2011 (N = 293). N/A. Sleep duration was reported and in a subgroup sleep quality (efficiency, latency, awakenings) was measured with accelerometry. High-frequency (HF) power and autonomic balance (LF/HF) were calculated on supine 5-minute HRV measurements. Stress was measured by emotion and problem behavior questionnaires. Sleep duration and quality were used as HRV predictors in corrected cross-sectional and longitudinal regressions. Stress was tested as mediator (intermediate pathway) or moderator (interaction) in sleep-HRV associations. In both cross-sectional and longitudinal analyses, long sleep latency could predict lower HF (parasympathetic activity), while nocturnal awakenings, sleep latency, low sleep efficiency, and low corrected sleep duration were related to higher LF/HF (sympathetic/parasympathetic balance). Parental reported sleep duration was not associated with HRV. The significances remained after correction for stress. Stress was not a mediator, but a moderator (enhancer) in the relationship between sleep quality and HRV. Low sleep quality but not parent-reported low sleep duration leads to an unhealthier heart rate variability pattern (sympathetic over parasympathetic dominance). This stresses the importance of good sleep quality for cardiovascular health in children.

Do chronic medical conditions increase the risk of eating disorder? A cross-sectional investigation of eating pathology in adolescent females with scoliosis and diabetes.

PubMed

Smith, Fiona M; Latchford, Gary J; Hall, Richard M; Dickson, Robert A

2008-01-01

To investigate levels of eating pathology in female adolescents diagnosed with a chronic condition causing appearance change (adolescent-onset idiopathic scoliosis), a chronic condition affecting nutritional behavior (insulin-dependent diabetes mellitus), and healthy age-matched controls. Cross-sectional comparison of 192 females aged 11-19 years; 76 individuals diagnosed with scoliosis, 40 diagnosed with diabetes, and 76 control participants. Disordered eating behavior was quantified using the Eating Disorder Examination Questionnaire, and weight and body mass index (weight [kg]/height [m(2)]) measurements were taken for each participant. The scoliosis group weighed less and had lower BMI scores (p < .001) than control participants. Of the participants with scoliosis, 25% were severely underweight, but only two met the behavioral criteria for anorexia nervosa; in others no association with disordered eating behaviour was found. Eating disorders were significantly more common (p < .05) in the diabetes participants than in the control group, with 27.5% of the group classified as having bulimia or binge eating disorder. All those classified as overweight or obese in the diabetes group were classified as pathological in terms of eating behavior. The relationship between scoliosis and low body mass is a concern but is not a result of an eating disorder. Etiological mechanisms remain unclear and require further investigation. In the diabetes participants, bulimia and binge eating may prejudice effective condition management. Implications for successful adaptation, treatment intervention, and future research are discussed.

Violent video game effects on aggression, empathy, and prosocial behavior in eastern and western countries: a meta-analytic review.

PubMed

Anderson, Craig A; Shibuya, Akiko; Ihori, Nobuko; Swing, Edward L; Bushman, Brad J; Sakamoto, Akira; Rothstein, Hannah R; Saleem, Muniba

2010-03-01

Meta-analytic procedures were used to test the effects of violent video games on aggressive behavior, aggressive cognition, aggressive affect, physiological arousal, empathy/desensitization, and prosocial behavior. Unique features of this meta-analytic review include (a) more restrictive methodological quality inclusion criteria than in past meta-analyses; (b) cross-cultural comparisons; (c) longitudinal studies for all outcomes except physiological arousal; (d) conservative statistical controls; (e) multiple moderator analyses; and (f) sensitivity analyses. Social-cognitive models and cultural differences between Japan and Western countries were used to generate theory-based predictions. Meta-analyses yielded significant effects for all 6 outcome variables. The pattern of results for different outcomes and research designs (experimental, cross-sectional, longitudinal) fit theoretical predictions well. The evidence strongly suggests that exposure to violent video games is a causal risk factor for increased aggressive behavior, aggressive cognition, and aggressive affect and for decreased empathy and prosocial behavior. Moderator analyses revealed significant research design effects, weak evidence of cultural differences in susceptibility and type of measurement effects, and no evidence of sex differences in susceptibility. Results of various sensitivity analyses revealed these effects to be robust, with little evidence of selection (publication) bias.

Traffic-Related Air Pollution, Noise at School, and Behavioral Problems in Barcelona Schoolchildren: A Cross-Sectional Study.

PubMed

Forns, Joan; Dadvand, Payam; Foraster, Maria; Alvarez-Pedrerol, Mar; Rivas, Ioar; López-Vicente, Mònica; Suades-Gonzalez, Elisabet; Garcia-Esteban, Raquel; Esnaola, Mikel; Cirach, Marta; Grellier, James; Basagaña, Xavier; Querol, Xavier; Guxens, Mònica; Nieuwenhuijsen, Mark J; Sunyer, Jordi

2016-04-01

The available evidence of the effects of air pollution and noise on behavioral development is limited, and it overlooks exposure at schools, where children spend a considerable amount of time. We aimed to investigate the associations of exposure to traffic-related air pollutants (TRAPs) and noise at school on behavioral development of schoolchildren. We evaluated children 7-11 years of age in Barcelona (Catalonia, Spain) during 2012-2013 within the BREATHE project. Indoor and outdoor concentrations of elemental carbon (EC), black carbon (BC), and nitrogen dioxide (NO2) were measured at schools in two separate 1-week campaigns. In one campaign we also measured noise levels inside classrooms. Parents filled out the strengths and difficulties questionnaire (SDQ) to assess child behavioral development, while teachers completed the attention deficit/hyperactivity disorder criteria of the DSM-IV (ADHD-DSM-IV) list to assess specific ADHD symptomatology. Negative binomial mixed-effects models were used to estimate associations between the exposures and behavioral development scores. Interquartile range (IQR) increases in indoor and outdoor EC, BC, and NO2 concentrations were positively associated with SDQ total difficulties scores (suggesting more frequent behavioral problems) in adjusted multivariate models, whereas noise was significantly associated with ADHD-DSM-IV scores. In our study population of 7- to 11-year-old children residing in Barcelona, exposure to TRAPs at school was associated with increased behavioral problems in schoolchildren. Noise exposure at school was associated with more ADHD symptoms. Forns J, Dadvand P, Foraster M, Alvarez-Pedrerol M, Rivas I, López-Vicente M, Suades-Gonzalez E, Garcia-Esteban R, Esnaola M, Cirach M, Grellier J, Basagaña X, Querol X, Guxens M, Nieuwenhuijsen MJ, Sunyer J. 2016. Traffic-related air pollution, noise at school, and behavioral problems in Barcelona schoolchildren: a cross-sectional study. Environ Health Perspect 124:529-535; http://dx.doi.org/10.1289/ehp.1409449.

Traffic-Related Air Pollution, Noise at School, and Behavioral Problems in Barcelona Schoolchildren: A Cross-Sectional Study

PubMed Central

Forns, Joan; Dadvand, Payam; Foraster, Maria; Alvarez-Pedrerol, Mar; Rivas, Ioar; López-Vicente, Mònica; Suades-Gonzalez, Elisabet; Garcia-Esteban, Raquel; Esnaola, Mikel; Cirach, Marta; Grellier, James; Basagaña, Xavier; Querol, Xavier; Guxens, Mònica; Nieuwenhuijsen, Mark J.; Sunyer, Jordi

2015-01-01

Background: The available evidence of the effects of air pollution and noise on behavioral development is limited, and it overlooks exposure at schools, where children spend a considerable amount of time. Objective: We aimed to investigate the associations of exposure to traffic-related air pollutants (TRAPs) and noise at school on behavioral development of schoolchildren. Methods: We evaluated children 7–11 years of age in Barcelona (Catalonia, Spain) during 2012–2013 within the BREATHE project. Indoor and outdoor concentrations of elemental carbon (EC), black carbon (BC), and nitrogen dioxide (NO2) were measured at schools in two separate 1-week campaigns. In one campaign we also measured noise levels inside classrooms. Parents filled out the strengths and difficulties questionnaire (SDQ) to assess child behavioral development, while teachers completed the attention deficit/hyperactivity disorder criteria of the DSM-IV (ADHD-DSM-IV) list to assess specific ADHD symptomatology. Negative binomial mixed-effects models were used to estimate associations between the exposures and behavioral development scores. Results: Interquartile range (IQR) increases in indoor and outdoor EC, BC, and NO2 concentrations were positively associated with SDQ total difficulties scores (suggesting more frequent behavioral problems) in adjusted multivariate models, whereas noise was significantly associated with ADHD-DSM-IV scores. Conclusion: In our study population of 7- to 11-year-old children residing in Barcelona, exposure to TRAPs at school was associated with increased behavioral problems in schoolchildren. Noise exposure at school was associated with more ADHD symptoms. Citation: Forns J, Dadvand P, Foraster M, Alvarez-Pedrerol M, Rivas I, López-Vicente M, Suades-Gonzalez E, Garcia-Esteban R, Esnaola M, Cirach M, Grellier J, Basagaña X, Querol X, Guxens M, Nieuwenhuijsen MJ, Sunyer J. 2016. Traffic-related air pollution, noise at school, and behavioral problems in Barcelona schoolchildren: a cross-sectional study. Environ Health Perspect 124:529–535; http://dx.doi.org/10.1289/ehp.1409449 PMID:26241036

Medical Writing Competency Model - Section 1: Functions, Tasks, and Activities.

PubMed

Clemow, David B; Wagner, Bertil; Marshallsay, Christopher; Benau, Dan; L'Heureux, Darryl; Brown, David H; Dasgupta, Devjani Ghosh; Girten, Eileen; Hubbard, Frank; Gawrylewski, Helle-Mai; Ebina, Hiroko; Stoltenborg, Janet; York, J P; Green, Kim; Wood, Linda Fossati; Toth, Lisa; Mihm, Michael; Katz, Nancy R; Vasconcelos, Nina-Maria; Sakiyama, Norihisa; Whitsell, Robin; Gopalakrishnan, Shobha; Bairnsfather, Susan; Wanderer, Tatyana; Schindler, Thomas M; Mikyas, Yeshi; Aoyama, Yumiko

2018-01-01

This article provides Section 1 of the 2017 Edition 2 Medical Writing Competency Model that describes the core work functions and associated tasks and activities related to professional medical writing within the life sciences industry. The functions in the Model are scientific communication strategy; document preparation, development, and finalization; document project management; document template, standard, format, and style development and maintenance; outsourcing, alliance partner, and client management; knowledge, skill, ability, and behavior development and sharing; and process improvement. The full Model also includes Section 2, which covers the knowledge, skills, abilities, and behaviors needed for medical writers to be effective in their roles; Section 2 is presented in a companion article. Regulatory, publication, and other scientific writing as well as management of writing activities are covered. The Model was developed to aid medical writers and managers within the life sciences industry regarding medical writing hiring, training, expectation and goal setting, performance evaluation, career development, retention, and role value sharing to cross-functional partners.

Medical Writing Competency Model - Section 2: Knowledge, Skills, Abilities, and Behaviors.

PubMed

Clemow, David B; Wagner, Bertil; Marshallsay, Christopher; Benau, Dan; L'Heureux, Darryl; Brown, David H; Dasgupta, Devjani Ghosh; Girten, Eileen; Hubbard, Frank; Gawrylewski, Helle-Mai; Ebina, Hiroko; Stoltenborg, Janet; York, J P; Green, Kim; Wood, Linda Fossati; Toth, Lisa; Mihm, Michael; Katz, Nancy R; Vasconcelos, Nina-Maria; Sakiyama, Norihisa; Whitsell, Robin; Gopalakrishnan, Shobha; Bairnsfather, Susan; Wanderer, Tatyana; Schindler, Thomas M; Mikyas, Yeshi; Aoyama, Yumiko

2018-01-01

This article provides Section 2 of the 2017 Edition 2 Medical Writing Competency Model that describes the knowledge, skills, abilities, and behaviors that professional medical writers need in order to perform effectively within the life sciences industry. What a medical writer should know, what they should be able to do, and how they should use this knowledge and these skills to facilitate their primary work function is a focus. Regulatory, publication, and other scientific writing as well as management of writing activities are covered. The full Model also includes Section 1, which covers the core work functions and associated tasks and activities related to professional medical writing within the life sciences industry; Section 1 is included in a companion article. The Model was developed to aid medical writers and managers within the life sciences industry regarding medical writing hiring, training, expectation and goal setting, performance evaluation, career development, retention, and role value sharing to cross-functional partners.

Factors associated with nurses' reporting of patients' aggressive behavior: a cross-sectional survey.

PubMed

Sato, Kana; Wakabayashi, Takeko; Kiyoshi-Teo, Hiroko; Fukahori, Hiroki

2013-10-01

Aggressive behavior and violence directed by patients at nurses are increasing worldwide. Aggressive behavior against nurses in their workplace can result in personal problems, such as impairment of physical and mental well-being, and, consequently, in organizational problems. Underreporting of patients' aggressive behavior is prevalent among nurses. Although underreporting might lead to inefficient attention to strategies for preventing aggressive behavior, the reasons for such behavior not being reported frequently have not been well examined. To explore the frequency of nurses' reporting to their managers of patients' aggressive behavior by type and degree of impact suffered by the nurses, to examine the association between reporting of aggressive behavior and demographic factors, and to determine the reasons for underreporting. A questionnaire-based cross-sectional survey. Six acute care hospitals in two regions in Japan. A total of 1953 nurses working at general acute care hospitals participated. Data were collected through a questionnaire seeking sociodemographic information, information on experience of aggressive behavior from patients, and the frequency with which they had reported such behavior in the previous month. The questionnaire also contained items assessing barriers to reporting of patients' aggressive behavior. The association between the possible influencing factors and reporting behavior was assessed using multiple logistic regression analyses. Of the 1953 questionnaires distributed, 1498 (76.7%) were returned, and 1385 (70.9%) fully completed questionnaires were analyzed. More than one-third of the respondents had experienced the mildest assessed level of impact from patients' aggressive behavior, and 70% of those hardly reported any incidents. The milder the impact was, the less the nurse victims tended to report the incident. Nurse's tendency to feel that aggressive behavior was mitigated by the situation, less work experience, and lack of confidence that management would defend staff nurses from patients' aggressive behavior were found to be negatively associated with reporting behavior. This study identified factors associated with nurses' reporting of patients' aggressive behavior. Underreporting was found to be associated with the level of impact, managerial attitudes, nurses' work experience, and nurses' perception that the behavior was mitigated by the situation. Improving education among nurses to promote reporting incidents and establishing an organized system is needed. Copyright © 2012 Elsevier Ltd. All rights reserved.

Eating behavior and nutrition knowledge among musical theatre students.

PubMed

Vitzthum, Karin; Endres, Eva; Koch, Franziska; Groneberg, David A; Quarcoo, David; Wanke, Eileen; Mache, Stefanie

2013-03-01

Eating is a central part in human (social) life. Athletic performance and physical attractiveness are linked to appropriate nutritional behavior, especially for performing artists. Eating behavior and nutrition knowledge have not been examined in musical theatre students so far, which this study aims to analyze. We administered a cross-sectional questionnaire study to 37 musical theatre students. Results for the Eating Disorder Examination-Questionnaire (EDE-Q) showed non-pathological values for 92% of all participants, but 81% of participants answered correctly on only 30-59% of questions on the General Nutrition Knowledge Questionnaire (GNKQ). Our study results reveal the need for specific nutritional knowledge transfer programs for this target group.

Autism Symptomatology in Boys with Fragile X Syndrome: A Cross Sectional Developmental Trajectories Comparison with Nonsyndromic Autism Spectrum Disorder

PubMed Central

Thurman, Angela John; McDuffie, Andrea; Kover, Sara T.; Hagerman, Randi J.; Abbeduto, Leonard

2015-01-01

Although males with fragile X syndrome (FXS) are frequently described as demonstrating autism symptomatology, there is much debate regarding whether the behavioral symptoms representing the core domains of autism are the result of the same or different underlying neurological/psychological mechanisms. The present study used a cross-sectional developmental trajectories approach to compare the profiles of autism symptomatology relative to chronological age (CA), nonverbal IQ, and expressive vocabulary ability between individuals with FXS and individuals with nonsyndromic ASD. Results suggest that the onset of autism symptoms and their developmental trajectories in males with FXS differ in important ways as a function of chronological age, nonverbal cognitive ability, and expressive vocabulary relative to males with nonsyndromic ASD. Theoretical and clinical implications are discussed. PMID:25904201

Masonry Columns Confined by Steel Fiber Composite Wraps

PubMed Central

Borri, Antonio; Castori, Giulio; Corradi, Marco

2011-01-01

The application of steel fiber reinforced polymer (SRP) as a means of increasing the capacity of masonry columns is investigated in this study. The behavior of 23 solid-brick specimens that are externally wrapped by SRP sheets in low volumetric ratios is presented. The specimens are subjected to axial monotonic load until failure occurs. Two widely used types of masonry columns of differing square cross-sections were tested in compression (square and octagonal cross-sections). It is concluded that SRP-confined masonry behaves very much like fiber reinforced polymers (FRP)-confined masonry. Confinement increases both the load-carrying capacity and the deformability of masonry almost linearly with average confining stress. A comparative analysis between experimental and theoretical values computed in compliance with the Italian Council of Research (CNR) was also developed. PMID:28879991

Synchrotron radiation based cross-sectional scanning photoelectron microscopy and spectroscopy of n-ZnO:Al/p-GaN:Mg heterojunction

NASA Astrophysics Data System (ADS)

Lee, Kai-Hsuan; Chang, Ping-Chuan; Chen, Tse-Pu; Chang, Sheng-Po; Shiu, Hung-Wei; Chang, Lo-Yueh; Chen, Chia-Hao; Chang, Shoou-Jinn

2013-02-01

Al-doped ZnO (AZO) deposited by radio frequency co-sputtering is formed on epitaxial Mg-doped GaN template at room temperature to achieve n-AZO/p-GaN heterojunction. Alignment of AZO and GaN bands is investigated using synchrotron radiation based cross-sectional scanning photoelectron microscopy and spectroscopy on the nonpolar side-facet of a vertically c-axis aligned heterostructure. It shows type-II band configuration with valence band offset of 1.63 ± 0.1 eV and conduction band offset of 1.61 ± 0.1 eV, respectively. Rectification behavior is clearly observed, with a ratio of forward-to-reverse current up to six orders of magnitude when the bias is applied across the p-n junction.

Masonry Columns Confined by Steel Fiber Composite Wraps.

PubMed

Borri, Antonio; Castori, Giulio; Corradi, Marco

2011-01-21

The application of steel fiber reinforced polymer (SRP) as a means of increasing the capacity of masonry columns is investigated in this study. The behavior of 23 solid-brick specimens that are externally wrapped by SRP sheets in low volumetric ratios is presented. The specimens are subjected to axial monotonic load until failure occurs. Two widely used types of masonry columns of differing square cross-sections were tested in compression (square and octagonal cross-sections). It is concluded that SRP-confined masonry behaves very much like fiber reinforced polymers (FRP)-confined masonry. Confinement increases both the load-carrying capacity and the deformability of masonry almost linearly with average confining stress. A comparative analysis between experimental and theoretical values computed in compliance with the Italian Council of Research (CNR) was also developed.

Synchrotron radiation based cross-sectional scanning photoelectron microscopy and spectroscopy of n-ZnO:Al/p-GaN:Mg heterojunction

DOE Office of Scientific and Technical Information (OSTI.GOV)

Lee, Kai-Hsuan; Chen, Chia-Hao; Chang, Ping-Chuan

2013-02-18

Al-doped ZnO (AZO) deposited by radio frequency co-sputtering is formed on epitaxial Mg-doped GaN template at room temperature to achieve n-AZO/p-GaN heterojunction. Alignment of AZO and GaN bands is investigated using synchrotron radiation based cross-sectional scanning photoelectron microscopy and spectroscopy on the nonpolar side-facet of a vertically c-axis aligned heterostructure. It shows type-II band configuration with valence band offset of 1.63 {+-} 0.1 eV and conduction band offset of 1.61 {+-} 0.1 eV, respectively. Rectification behavior is clearly observed, with a ratio of forward-to-reverse current up to six orders of magnitude when the bias is applied across the p-n junction.

Modeling the intention to choose natural vaginal delivery: using reasoned action and social cognitive theories.

PubMed

Kanani, Safieh; Allahverdipour, Hamid; AsghariJafarabadi, Mohammad

2015-01-01

The Behavioral Intention Model is one of the best and most widely models used regarding attitude of behavioral of pregnancy and decrease the rate of cesarean section (CS) among pregnant women, except effect of attitude and subjective norms on behavioral intention. Two variables of self-efficacy, and outcome expectation, relate to individual's behavior in an upcoming situation, and both of them are important at the development of behavior. The purpose of the present study was to develop a model to explain women's inten-tion to choose natural vaginal delivery (NVD). The variables of self-efficacy and outcome expectations, derived from Bandura's Social Cognitive Theory, and Behavioral Intention Model constructs were used to define the model. The study was descriptive and cross-sectional in nature and took place in Pars Abad, Iran in 2014. The non-probability sample consisted of 200 pregnant women who voluntarily participated in the study and provided the data. SPSS 21 and MPLUS 6.8 were employed to analyze the data. Self-efficacy, outcome expectations, and attitude toward NVD were associated with intention to choose the NVD. The study findings may play a role in designing educational interventions aimed at influencing the NVD and improving childbirth programs.

Exploring the Relationship between Experiential Avoidance, Alcohol Use Disorders, and Alcohol-Related Problems among First-Year College Students

ERIC Educational Resources Information Center

Levin, Michael E.; Lillis, Jason; Seeley, John; Hayes, Steven C.; Pistorello, Jacqueline; Biglan, Anthony

2012-01-01

Objective: This study explored the relationship of experiential avoidance (eg, the tendency to avoid, suppress, or otherwise control internal experiences even when doing so causes behavioral harm) to alcohol use disorders and alcohol-related problems. Participants: Cross-sectional data were collected from 240 undergraduate college students in…

Rotordynamic Behavior Of Sawtooth-Pattern Damping Seals

NASA Technical Reports Server (NTRS)

Nolan, Steven A.

1992-01-01

Report describes comparative experimental and theoretical study of rotordynamics of several different annular liquid pump seals. Introduces damping seals of new type in which inner surfaces of stators have saw-tooth-cross-section axial grooves interrupted at regular axial intervals by circumferential dams. Teeth of sawtooth patterns directed against rotations in attempt to reduce further asymptotic circumferential velocities of fluids.

Relationships between Event-Related Potentials and Behavioral and Scholastic Measures of Reading Ability: A Large-Scale, Cross-Sectional Study

ERIC Educational Resources Information Center

Khalifian, Negin; Stites, Mallory C.; Laszlo, Sarah

2016-01-01

In the cognitive, computational, neuropsychological, and educational literatures, it is established that children approach text in unique ways, and that even adult readers can differ in the strategies they bring to reading. In the developmental event-related potential (ERP) literature, however, children with differing degrees of reading ability…

Evaluation of HIV/AIDS Secondary School Peer Education in Rural Nigeria

ERIC Educational Resources Information Center

van der Maas, Frank; Otte, Willem M.

2009-01-01

In this study, we assessed whether peer education is an effective method of HIV/AIDS awareness, in terms of knowledge, misconception and behavior, among adolescents in the rural area of Nigeria. A comparative case series (n = 250), cross-sectional structured survey (n = 135) and focus group discussions (n = 80) were undertaken among adolescents.…

Sexual Abuse among Female High School Students in Istanbul, Turkey

ERIC Educational Resources Information Center

Alikasifoglu, Mujgan; Erginoz, Ethem; Ercan, Oya; Albayrak-Kaymak, Deniz; Uysal, Omer; Ilter, Ozdemir

2006-01-01

Objective: The objective of the study was to determine the prevalence of sexual abuse in female adolescents in Istanbul, Turkey from data collected as part of a school-based population study on health and health behaviors. Method: A stratified cluster sampling procedure was used for this cross-sectional study. The study sample included 1,955…

Body Satisfaction and Sexual Health Behaviors among New Zealand Secondary School Students

ERIC Educational Resources Information Center

Larson, Bridget K.; Clark, Terryann C.; Robinson, Elizabeth M.; Utter, Jennifer

2012-01-01

This population-based study of 2931 respondents to Youth07 (a cross-sectional survey of New Zealand secondary students' health) examines associations between weight-related variables and sexual risk-taking. It is hypothesized that girls who report poorer body satisfaction or previous weight-loss attempts will be: more likely to be currently…

College Students' Ageist Behavior: The Role of Aging Knowledge and Perceived Vulnerability to Disease

ERIC Educational Resources Information Center

Stahl, Sarah T.; Metzger, Aaron

2013-01-01

This cross-sectional study examined the associations among perceived vulnerability to disease, aging knowledge, and ageism (positive and negative) in a sample of undergraduate students enrolled in a human development course (N = 649; M age = 19.94 years, SD = 2.84 years). Perceived vulnerability to disease and aging knowledge were associated with…

Help-Seeking Stigma in Asian American College Women: The Role of Disordered Eating Cognitions and Psychological Inflexibility

ERIC Educational Resources Information Center

Masuda, Akihiko; Goodnight, Bradly L.; Ng, Stacey Y.; Ward Schaefer, L.; Tully, Erin C.; Chan, Wing Yi; Drake, Chad E.

2017-01-01

Help-seeking stigma is considered a major obstacle to seeking professional psychological services in Asian American college women. Informed in part by objectification theory and the psychological flexibility model of behavior change, the present cross-sectional study examines the role of disordered eating cognition and psychological inflexibility…

Adolescents' Exposure to Sexy Media Does Not Hasten the Initiation of Sexual Intercourse

ERIC Educational Resources Information Center

Steinberg, Laurence; Monahan, Kathryn C.

2011-01-01

It is widely believed that exposure to sexy content in the mass media leads teenagers to become sexually active. Although most research linking sexy media exposure to adolescents' sexual behavior is cross-sectional, several recent, well-publicized longitudinal studies purport to find a causal connection, which has alarmed the public and prompted…

Effects of Attention Cueing on Learning Speech Organ Operation through Mobile Phones

ERIC Educational Resources Information Center

Yang, Hui-Yu

2017-01-01

The studies regarding using a cross sectional view of speech organs enriched with attention cueing and written text to probe learners' learning efficiency and behavior through mobile phones is scant. The purpose of this study was to examine whether the presence of attention cueing can benefit learners with different amounts of prior knowledge in…

The Production and Cost Behavior of Higher Education Institutions.

ERIC Educational Resources Information Center

Carlson, Daryl E.

This report is an empirical analysis of the "frontier" production and cost relationships between the number of students enrolled and the labor and capital inputs observed over a wide cross-section of four-year higher education institutions in the United States. In the analysis, students are differentiated as to type and as to part-time versus…

Prevalence of Cardiovascular Risk Factors in Older People with Intellectual Disability

ERIC Educational Resources Information Center

de Winter, Channa F.; Magilsen, Karla W.; van Alfen, J. Claudia; Penning, Corine; Evenhuis, Heleen M.

2009-01-01

The prevalence and correlates of cardiovascular risk factors in older adults with intellectual disability was examined. We conducted a cross-sectional study with 50- to 90-year-old clients (N = 470) of three Dutch intellectual disability care providing organizations and found that healthy behavior was low, with 98.9% of the participants having an…

Lifetime Incidences of Traumatic Events and Mental Health among Children Affected by HIV/AIDS in Rural China

ERIC Educational Resources Information Center

Li, Xiaoming; Barnett, Douglas; Fang, Xiaoyi; Lin, Xiuyun; Zhao, Guoxiang; Zhao, Junfeng; Hong, Yan; Zhang, Liying; Naar-King, Sylvie; Stanton, Bonita

2009-01-01

Cross-sectional data were gathered from 1,625 children (M age = 12.85, SD = 2.21) which included 755 AIDS orphans, 466 vulnerable children, and 404 comparison children. Participants completed self-report measures of exposure to traumatic events, and psychosocial adjustment including behavior problems, depression, self-esteem, and future…

Meeting Contemporary Statistical Needs of Instructional Communication Research: Modeling Teaching and Learning as a Conditional Process. Forum: The Future of Instructional Communication

ERIC Educational Resources Information Center

Goodboy, Alan K.

2017-01-01

For decades, instructional communication scholars have relied predominantly on cross-sectional survey methods to generate empirical associations between effective teaching and student learning. These studies typically correlate students' perceptions of their instructor's teaching behaviors with subjective self-report assessments of their own…

Sex Differences in Contraception Non-Use among Urban Adolescents: Risk Factors for Unintended Pregnancy

ERIC Educational Resources Information Center

Casola, Allison R.; Nelson, Deborah B.; Patterson, Freda

2017-01-01

Background: Contraception non-use among sexually active adolescents is a major cause of unintended pregnancy (UP). Methods: In this cross-sectional study we sought to identify overall and sex-specific correlates of contraception non-use using the 2015 Philadelphia Youth Risk Behavior Survey (YRBS) (N = 9540). Multivariate regression models were…

Determinants of Quality of Life in Primary Care Patients with Diabetes: Implications for Social Workers

ERIC Educational Resources Information Center

Ayalon, Liat; Gross, Revital; Tabenkin, Hava; Porath, Avi; Heymann, Anthony; Porter, Boaz

2008-01-01

Using a cross-sectional design of 400 primary care patients with diabetes, the authors evaluated demographics, health status, subjective health and mental health, health behaviors, health beliefs, knowledge of diabetes treatment, satisfaction with medical care, and quality of medical care as potential predictors of QoL and QoL in the hypothetical…

Cultural and Environmental Influences on Footedness: Cross-Sectional Study in Urban and Semi-Urban Malawi

ERIC Educational Resources Information Center

Zverev, Y. P.; Mipando, M.

2007-01-01

The present study was designed to assess cultural and environmental pressure against left-foot preference in urban and semi-urban Malawi. The findings demonstrated that, when compared to handedness, footedness appeared to be less biased behavioral laterality in culturally restrictive communities. The percentage of responders with negative views on…

Characteristics of Students in Traditional versus Alternative High Schools: A Cross-Sectional Analysis of Enrollment in One Urban District

ERIC Educational Resources Information Center

Perzigian, Aaron B.; Afacan, Kemal; Justin, Whitney; Wilkerson, Kimber L.

2017-01-01

Urban school districts are comprised of many diverse high school environments including comprehensive neighborhood schools as well as a variety of smaller alternative models that focus on innovative practices, behavior remediation, or academic recovery. In terms of enrollment distribution, urban school districts are increasingly offering…

Attitudes and Descriptive Norms of Alcohol-Related Problems as Predictors of Alcohol Use among College Students

ERIC Educational Resources Information Center

Sheppard, Meg E.; Usdan, Stuart L.; Higginbotham, John C.; Cremeens-Matthews, Jennifer L.

2016-01-01

Background: The purpose of this study is to identify predictors of alcohol use based on personal values and several constructs from the Integrated Behavioral Model (i.e., attitudes, injunctive norms and descriptive norms) among undergraduate college students. Methods: A cross sectional study design was used with a convenience sample of college…

Predictors of Obesity in a US Sample of High School Adolescents with and without Disabilities

ERIC Educational Resources Information Center

Papas, Mia A.; Trabulsi, Jillian C.; Axe, Michelle; Rimmer, James H.

2016-01-01

Background: Childhood obesity is a major public health concern. Children with disabilities have a higher prevalence of obesity. Objective: We examined factors associated with obesity within a cross-sectional study of US adolescents with and without disabilities. Methods: Data were obtained from the 2011 Youth Risk Behavior Survey. Logistic…

School as a Determinant for Health Outcomes--A Structural Equation Model Analysis

ERIC Educational Resources Information Center

Ravens-Sieberer, Ulrike; Freeman, John; Kokonyei, Gyongyi; Thomas, Christiane A.; Erhart, Michael

2009-01-01

Purpose: The purpose of this paper is to investigate whether students' perceptions of their school environment and their adjustment to school are associated with health outcomes across gender and age groups. Design/methodology/approach: Data from the cross-sectional international Health Behavior in School-aged Children Survey of the year 2002…

Associations between Parental Limits, School Vending Machine Purchases, and Soft Drink Consumption among Kentucky Middle School Students

ERIC Educational Resources Information Center

Nickelson, Jen; Roseman, Mary G.; Forthofer, Melinda S.

2010-01-01

Objective: To examine associations between parental limits on soft drinks and purchasing soft drinks from school vending machines and consuming soft drinks among middle school students. Design: Secondary analysis of cross-sectional data from the middle school Youth Risk Behavior Survey. Setting: Eight public middle schools in central Kentucky.…

Predictors of Parental Locus of Control in Mothers of Pre- and Early Adolescents

ERIC Educational Resources Information Center

Freed, Rachel D.; Tompson, Martha C.

2011-01-01

Parental locus of control refers to parents' perceived power and efficacy in child-rearing situations. This study explored parental locus of control and its correlates in 160 mothers of children ages 8 to 14 cross-sectionally and 1 year later. Maternal depression, maternal expressed emotion, and child internalizing and externalizing behavior were…

Level of Motivation in Mastering Challenging Tasks in Children with Cerebral Palsy

ERIC Educational Resources Information Center

Majnemer, Annette; Shevell, Michael; Law, Mary; Poulin, Chantal; Rosenbaum, Peter

2010-01-01

Aim: The aim of this study was to describe and identify factors associated with motivation in children with cerebral palsy (CP). Method: Children with CP were recruited for this cross-sectional study. Children were assessed using the Leiter Intelligence Test, the Gross Motor Function Measure, and the Vineland Adaptive Behavior Scale. Parents…

An Association between College Students' Health Promotion Practices and Perceived Stress

ERIC Educational Resources Information Center

Li, Ying; Lindsey, Billie J.

2013-01-01

This study was undertaken to gain a better understanding of health promotion practices among college students and the relationship of stress and the practice of various health behaviors. Method: In Fall 2008, 319 students from a mid-size university participated in a cross-sectional survey utilizing the Perceived Stress Scale (PSS) and the Health…

The Measurement of Power Perception Through Cartoon Strip Completion.

ERIC Educational Resources Information Center

Goodchilds, Jacqueline D.; Raven, Bertram H.

Two cartoon strips were the vehicle for surveying perceptions of power use in everyday situations. A stratified cross-sectional sample of 430 adults in Los Angeles were interviewed. Their task was to choose a behavior, illustrated by a cartoon panel, most likely to be employed by a policeman in one instance and a nurse in another to secure…

Social Influences, Social Context, and Health Behaviors among Working-Class, Multi-Ethnic Adults

ERIC Educational Resources Information Center

Emmons, Karen M.; Barbeau, Elizabeth M.; Gutheil, Caitlin; Stryker, Jo Ellen; Stoddard, Anne M.

2007-01-01

Little research has explored the relationship between social influences (e.g., social networks, social support, social norms) and health as related to modifying factors that may contribute to health disparities. This is a cross-sectional analysis of fruit and vegetable intake and physical activity, using baseline data from two cancer prevention…

Trait Anger, Anger Expression, and Suicide Attempts among Adolescents and Young Adults: A Prospective Study

ERIC Educational Resources Information Center

Daniel, Stephanie S.; Goldston, David B.; Erkanli, Alaattin; Franklin, Joseph C.; Mayfield, Andrew M.

2009-01-01

Previous studies of the relationship between anger, anger expression, and suicidal behavior have been largely cross-sectional and have yielded mixed findings. In a prospective, naturalistic study, we examined how trait anger and anger expression influenced the likelihood of suicide attempts among 180 adolescents followed for up to 13.3 years after…

The Effect of Audio Tours on Learning and Social Interaction: An Evaluation at Carlsbad Caverns National Park

ERIC Educational Resources Information Center

Novey, Levi T.; Hall, Troy E.

2007-01-01

Auditory forms of nonpersonal communication have rarely been evaluated in informal settings like parks and museums. This study evaluated the effect of an interpretive audio tour on visitor knowledge and social behavior at Carlsbad Caverns National Park. A cross-sectional pretest/posttest quasi-experimental design compared the responses of audio…

Association of Self-Efficacy and Self-Regulation with Nutrition and Exercise Behaviors in a Community Sample of Adults.

PubMed

Shieh, Carol; Weaver, Michael T; Hanna, Kathleen M; Newsome, Kathleen; Mogos, Mulubrhan

2015-01-01

This study examined the association of self-efficacy and self-regulation with nutrition and exercise behaviors. The study used a cross-sectional design and included 108 participants (54 men, 54 women). Nutrition behaviors (fruit/vegetable consumption, dinner cooking, and restaurant eating) and exercise were measured using total days in last week a behavior was reported. Instruments measuring self-efficacy and self-regulation demonstrated excellent Cronbach's alphas (.93-.95). Path analysis indicated only fruit/vegetable consumption and exercise were associated with self-efficacy and self-regulation. Self-regulation showed direct association with fruit/vegetable consumption and exercise, but self-efficacy had direct association only with exercise. Self-efficacy and self-regulation should be strategically used to promote health behaviors.

Smoking, alcohol consumption and betal-quid chewing among young adult Myanmar laborers in Thailand.

PubMed

Htin, Kyaw; Howteerakull, Nopporn; Suwannapong, Nawarat; TipayamongkholgulI, Mathuros

2014-07-01

Health-risk behaviors among young adults are a serious public health problem. This cross sectional study aimed to estimate the prevalence of single and concurrent multiple health-risk behaviors: smoking tobacco, consuming alcohol, and chewing betel quid among young adult Myanmar laborers in Mae Sot District, Tak Province, Thailand. Three hundred Myanmar laborers, aged 18-24 years, were interviewed using a structured questionnaire. About 33.6% reported no risk behaviors, 24.7% had one, and 41.7% had two or three risk behaviors. Multinomial logistic regression analysis showed six variables were significantly associated with health-risk behaviors: male gender, high/moderate custom/traditional influences, friends who smoked/consumed alcohol/chewed betel quid, and exposure to betel-quid chewing by other family members.

Crossing the "line": College students and academic integrity in nursing.

PubMed

Bultas, Margaret W; Schmuke, Ashley D; Davis, Renée L; Palmer, Janice L

2017-09-01

Researchers have shown a relationship between academic integrity in the classroom and acts of dishonest behavior in the clinical setting which is concerning for nursing faculty and the health care field. The purpose of this study was to compare the attitudes toward academic integrity and the frequency of behaviors related to academic dishonesty in nursing and non-nursing students at a religiously affiliated institution. A cross-sectional, descriptive design was used to collect data regarding the knowledge, behavior, perceptions, and attitudes related to academic integrity via an online survey. Nursing students and non-nursing students who attended a religiously affiliated (Jesuit) University in the United States were surveyed for this study. Results of the study suggest upper division and second degree nursing students are less tolerant and more condemnatory of cheating than younger students. Frequent dishonest classroom behaviors include asking and telling other students what was on the exam while the most frequent dishonest clinical behaviors included documenting findings that were not assessed or findings that were false. Recommendations for nursing faculty include frequent and timely discussion of expected behaviors and values of nurses in order to support students' development of honesty and integrity beyond the classroom and into the clinical setting. Copyright © 2017 Elsevier Ltd. All rights reserved.

The development and preliminary validation of the behavior, environment, and changeability survey (BECS).

PubMed

Walsh, Jennifer R; Hebert, Angel; Byrd-Bredbenner, Carol; Carey, Gale; Colby, Sarah; Brown-Esters, Onikia N; Greene, Geoffrey; Hoerr, Sharon; Horacek, Tanya; Kattelmann, Kendra; Kidd, Tandalayo; Koenings, Mallory; Phillips, Beatrice; Shelnutt, Karla P; White, Adrienne A

2012-01-01

To develop and test the validity of the Behavior, Environment, and Changeability Survey (BECS) for identifying the importance and changeability of nutrition, exercise, and stress management behavior and related aspects of the environment. A cross-sectional, online survey of the BECS and selected validated instruments. Ten state universities. A convenience sample of college students (n = 1,283), ages 18-24 years. Principal component analysis was used to confirm a 6-component structure of the BECS in 2 independent samples for the purpose of cross-validation. Internal consistency was measured and construct and criterion-related analyses were conducted to test the reliability and validity of the BECS subscales. Six components representing 34 BECS items were revealed from the original 69 items and explained 64% of the total variance. Six scales were retained, and internal consistency of each ranged from α = .82 to .93. BECS Nutrition Behavior and Nutrition Changeability scale scores were highest for participants in action/maintenance Stages of Change for fruit and vegetable intake. There is strong support for the use of the BECS when planning health programs to gain insight into behavior that young adults are willing to improve, specifically related to nutrition, exercise, and sleep. Copyright © 2012 Society for Nutrition Education and Behavior. Published by Elsevier Inc. All rights reserved.

The Timing of School Transitions and Early Adolescent Problem Behavior

PubMed Central

Lippold, Melissa A.; Powers, Christopher J.; Syvertsen, Amy K.; Feinberg, Mark E.; Greenberg, Mark T.

2013-01-01

This longitudinal study investigates whether rural adolescents who transition to a new school in sixth grade have higher levels of risky behavior than adolescents who transition in seventh grade. Our findings indicate that later school transitions had little effect on problem behavior between sixth and ninth grades. Cross-sectional analyses found a small number of temporary effects of transition timing on problem behavior: Spending an additional year in elementary school was associated with higher levels of deviant behavior in the Fall of Grade 6 and higher levels of antisocial peer associations in Grade 8. However, transition effects were not consistent across waves and latent growth curve models found no effects of transition timing on the trajectory of problem behavior. We discuss policy implications and compare our findings with other research on transition timing. PMID:24089584

The Impact of Entrepreneurial Leadership on Nurses' Innovation Behavior.

PubMed

Bagheri, Afsaneh; Akbari, Morteza

2018-01-01

The purpose of this study was to examine the influence of entrepreneurial leadership on nurses' innovation work behavior and its dimensions. This cross-sectional study employed the 10-item Innovation Work Behavior Questionnaire and the 8-item Entrepreneurial Leadership Questionnaire to explore the impact of entrepreneurial leadership on the innovation work behavior of 273 nurses from public and private hospitals in Iran. Entrepreneurial leadership had a significant positive impact on nurses' innovation work behavior and most strongly improved idea exploration, followed by idea generation, idea implementation, and idea championing. Entrepreneurial leadership was effective in enhancing nurses' innovation work behavior. More attention needs to be focused on developing entrepreneurial leadership competencies and on developing nurse leaders. Healthcare policies and strategies are needed to facilitate the implementation of entrepreneurial leadership by providing healthcare leaders with the appropriate environment. © 2017 Sigma Theta Tau International.

Callous-unemotional traits and antisocial behavior among adolescents: the role of self-serving cognitions.

PubMed

van Leeuwen, Nikki; Rodgers, Rachel F; Gibbs, John C; Chabrol, Henri

2014-02-01

Self-serving cognitions and callous-unemotional traits play important roles in adolescent antisocial behavior. The objective of this study was to cross-sectionally explore the mediating role of self-serving cognitions in the relationship between callous-unemotional traits and antisocial behavior. A sample of 972 high-school students completed self-report questionnaires assessing callous-unemotional traits, self-serving cognitive distortions and antisocial behavior. Two competing models exploring indirect effects accounting for the relationships between self-serving cognitive distortions, callous-unemotional traits and antisocial behaviors were tested. Both models revealed significant indirect effects, suggesting both pathways are possible. Gender was found to moderate these models. These findings suggest the importance of targeting self-serving cognitions in therapeutic interventions and increase our understanding of the role of self-serving cognitions in antisocial behavior.

History of childhood trauma and disruptive behaviors in the medical setting.

PubMed

Sansone, Randy A; Farukhi, Shahzad; Wiederman, Michael W

2012-03-01

In this study, we examined relationships between five types of childhood trauma and 17 disruptive behaviors in the medical setting. Using a cross-sectional consecutive sample of 394 internal medicine outpatients, we surveyed participants about five types of childhood trauma (i.e. witnessing of violence, physical neglect, emotional abuse, physical abuse, and sexual abuse) and 17 disruptive behaviors in the medical setting (e.g., yelling, cursing, threatening medical personnel). Initial correlations indicated relationships between four of the five forms of childhood trauma and the number of different disruptive behaviors endorsed. However, using multiple regression analysis, only witnessing violence and physical abuse remained independent predictors of disruptive behaviors in the medical setting. Individuals with childhood histories of witnessing violence and/or physical abuse are at-risk for perpetrating various disruptive behaviors in the medical setting.

The Influence of Corrosion and Cross-Section Diameter on the Mechanical Properties of B500c Steel

NASA Astrophysics Data System (ADS)

Apostolopoulos, Ch. Alk.

2009-03-01

Corrosion is a negative contributor on the structural integrity of concrete structures and leads to degradation of the mechanical properties of steel rebar. Exposure to chloride, seawater, salt and saltwater and deicing chemical environments influences the concrete-steel bond and weakens it. A considerable strength factor of the two-phase steel B500c (martensitic, ferritic-perlitic) is considered to be the outer martensitic cortex thickness, which varies according to the area of the rebar cross section. In order to evaluate the influence of corrosion and the size of the area on the mechanical properties of B500c steel, an experimental investigation was conducted on B500c ribbed steel rebar of 8, 12, 16, and 18 mm diameter, and which were artificially corroded for 10, 20, 30, 45, 60, 90, and 120 days. The laboratory tests suggest that corrosion duration and rebar cross-sectional area size had a significant impact on the strength and ductility degradation of the specimens. The tensile mechanical properties before and after corrosion indicated progressive variation and drastic drop in their values. The extended salt spray exposure enhanced the damage and created pits and notches, resulting in stress concentration points and progressive reduction of ductility and available energy. Anti-seismic design and codes that ignore the influence of the size of the cross-section area and the level of corrosion and mechanical behavior of reinforcing steel could lead to unpredictable performance during severe ground motion.

The influence of physical activity, sedentary behavior on health-related quality of life among the general population of children and adolescents: A systematic review

PubMed Central

Han, Li Hui; Zhang, Jian Hua; Luo, Sheng; Hu, Jin Wei; Sun, Kui

2017-01-01

Background The association between physical activity, sedentary behavior and health-related quality of life in children and adolescents has been mostly investigated in those young people with chronic disease conditions. No systematic review to date has synthesized the relationship between physical activity, sedentary behavior and health-related quality of life in the general healthy population of children and adolescents. The purpose of this study was to review systematically the existing literature that evaluated the relations between physical activity, sedentary behavior and health-related quality of life in the general population of children and adolescents. Methods We conducted a computer search for English language literature from databases of MEDLINE, EMBASE, PSYCINFO and PubMed-related articles as well as the reference lists of existing literature between 1946 and the second week of January 2017 to retrieve eligible studies. We included the studies that assessed associations between physical activity and/or sedentary behavior and health-related quality of life among the general population of children and adolescents aged between 3–18 years. The study design included cross-sectional, longitudinal and health intervention studies. We excluded the studies that examined associations between physical activity, sedentary behavior and health-related quality of life among children and adolescents with specific chronic diseases, and other studies and reports including reviews, meta-analyses, study protocols, comments, letters, case reports and guidelines. We followed up the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) statement in the reporting of this review. The risk of bias of the primary studies was assessed by the Newcastle-Ottawa Scale. We synthesized the difference in health-related quality of life scores between different levels of physical activity and sedentary time. Results In total, 31 studies met the inclusion criteria and were synthesized in the review. Most of the included studies used a cross-sectional design (n = 21). There were six longitudinal studies and three school-based physical activity intervention studies. One study used both cross-sectional and longitudinal designs. We found that higher levels of physical activity were associated with better health-related quality of life and increased time of sedentary behavior was linked to lower health-related quality of life among children and adolescents. A dose-response relation between physical activity, sedentary behavior and health-related quality of life was observed in several studies suggesting that the higher frequency of physical activity or the less time being sedentary, the better the health-related quality of life. Conclusions The findings in this study suggest that school health programs promoting active lifestyles among children and adolescents may contribute to the improvement of health-related quality of life. Future research is needed to extend studies on longitudinal relationships between physical activity, sedentary behavior and health-related quality of life, and on effects of physical activity interventions on health-related quality of life among children and youth. PMID:29121640

Sexual Activity and Physical Tenderness in Older Adults: Cross-Sectional Prevalence and Associated Characteristics.

PubMed

Freak-Poli, Rosanne; Kirkman, Maggie; De Castro Lima, Gustavo; Direk, Nese; Franco, Oscar H; Tiemeier, Henning

2017-07-01

Despite a common misconception, older adults engage in sexual behavior. However, there is limited sexual behavior research in older adults, which is often restricted to small samples, to cohorts recruiting adults from 45 years old, and to questions regarding only sexual intercourse. To assess the cross-sectional prevalence of and characteristics associated with sexual activity and physical tenderness in community-dwelling older adults. From the Rotterdam Study, sexual activity and physical tenderness were assessed in 2,374 dementia-free, community-dwelling men and women at least 65 years old from 2009 through 2012 in the Netherlands. Analyses were stratified by sex and partner status. Sexual activity and physical tenderness (eg, fondling or kissing) in the last 6 months. Potential associated characteristics included measurements of demographics, socioeconomic position, health behavior, and health status. The vast majority of partnered participants (men, n = 858; women, n = 724) had experienced physical tenderness in the previous 6 months (83.7% of men and 82.9% of women) and nearly half had engaged in sexual activity (49.5% and 40.4% respectively). Very few unpartnered women (n = 675) had engaged in sexual activity (1.3%) or physical tenderness (5.2%), whereas prevalence rates were slightly higher for unpartnered men (n = 117; 13.7% or 17.1%). Engaging in sexual behavior was generally associated with younger age, greater social support, healthier behaviors, and better physical and psychological health. Findings show that older adults engage in sexual activity. It is important not to assume that an older person is not interested in sexual pleasure or that an older person is unhappy with not having a sexual partner. Offering an opportunity for open discussion of sexuality and medical assistance without imposing is a difficult balance. We encourage health care professionals to proactively address sexuality and extend knowledge about safe sex and sexual function to older adults. Thus far, this is one of the largest samples of sexual behavior assessment in adults older than 60 years. Limitations of this study are common in sexual behavior research, including low sexual behavior engagement among unpartnered older adults and a small sample of unpartnered men, which restricted sex- and age-specific implications. Almost half of partnered older adults engaged in sexual activity and more than two thirds engaged in physical tenderness, but very few unpartnered older adults engaged in these behaviors. The greatest barrier to being sexually active at an older age is lack of a partner, which particularly affects women. Sexuality is an important aspect of active aging. Freak-Poli R, Kirkman M, De Castro Lima G, et al. Sexual Activity and Physical Tenderness in Older Adults: Cross-Sectional Prevalence and Associated Characteristics. J Sex Med 2017;14:918-927. Copyright © 2017 International Society for Sexual Medicine. Published by Elsevier Inc. All rights reserved.

Leadership behaviors of frontline staff nurses.

PubMed

Fardellone, Christine; Musil, Carol M; Smith, Elaine; Click, Elizabeth R

2014-11-01

A recommendation in the Institute of Medicine's report, The Future of Nursing: Leading Change, Advancing Health, challenges the nursing profession to enhance nursing's leadership role in health care redesign. This descriptive, correlational, cross-sectional study examined the self-perceived leadership behaviors of RNs enrolled in a clinical ladder career pathway. A self-report survey was conducted using the Leadership Practice Inventory and a demographic questionnaire. Significant associations between continuous and categorical demographic factors and ladder levels were reported. Nurses with more experience showed fewer leadership behaviors. Leadership development is necessary for nurses in all areas of practice. The findings from this study provide evidence of the strengths and weaknesses in leadership behaviors of staff clinical RNs who often make frontline decisions for patients. Copyright 2014, SLACK Incorporated.

Effects of task performance, helping, voice, and organizational loyalty on performance appraisal ratings.

PubMed

Whiting, Steven W; Podsakoff, Philip M; Pierce, Jason R

2008-01-01

Despite the fact that several studies have investigated the relationship between organizational citizenship behavior and performance appraisal ratings, the vast majority of these studies have been cross-sectional, correlational investigations conducted in organizational settings that do not allow researchers to establish the causal nature of this relationship. To address this lack of knowledge regarding causality, the authors conducted 2 studies designed to investigate the effects of task performance, helping behavior, voice, and organizational loyalty on performance appraisal evaluations. Findings demonstrated that each of these forms of behavior has significant effects on performance evaluation decisions and suggest that additional attention should be directed at both voice and organizational loyalty as important forms of citizenship behavior aimed at the organization. 2008 APA

Aggressive Marital Conflict, Maternal Harsh Punishment, and Child Aggressive-Disruptive Behavior: Evidence for Direct and Mediated Relations

PubMed Central

Erath, Stephen A.; Bierman, Karen L.

2009-01-01

Direct associations between aggressive marital conflict and child aggressive-disruptive behavior at home and school were explored in this cross-sectional study of 360 kindergarten children. In addition, mediated pathways linking aggressive marital conflict to maternal harsh punishment to child aggressive-disruptive behavior were examined. Moderation analyses explored how the overall frequency of marital disagreement might buffer or exacerbate the impact of aggressive marital conflict on maternal harsh punishment and child aggressive-disruptive behavior. Hierarchical regressions revealed direct pathways linking aggressive marital conflict to child aggressive-disruptive behavior at home and school and a partially mediated pathway linking aggressive marital conflict to child aggressive-disruptive behavior at home. Further analyses revealed that rates of marital disagreement moderated the association between aggressive marital conflict and child aggressive-disruptive behavior at home, with an attenuated association at high rates of marital disagreement as compared with low rates of marital disagreement. PMID:16756397

Happiness and health behaviors in South Korean adolescents: a cross-sectional study.

PubMed

Kye, Su Yeon; Kwon, Jeong Hyun; Park, Keeho

2016-01-01

We examined the associations between happiness and a wide range of health behaviors in South Korean adolescents. Study data were derived from the ninth Korea Youth Risk Behavior Web-based Survey administered from June to July 2013. In addition to happiness levels, the questionnaire included items on sociodemographics and health-related lifestyle factors (smoking, drinking, eating breakfast, fruit and vegetable consumption, physical activity, sedentary behavior, and hours of sleep). The multivariate analysis revealed that higher levels of happiness were associated with not smoking or drinking, eating breakfast, eating fruits daily, vegetable consumption, participating in at least 60 minutes of physical activity a day, avoiding sedentary behavior, and hours of sleep. Additionally, sex differences were found in relationships between happiness and eating fruit daily, participation in physical activity, and sedentary behavior. These results encourage public health professionals to consider the psychological aspects of adolescent life in working to improve their health behaviors and outcomes.

An assessment of health behavior peer effects in Peking University dormitories: a randomized cluster-assignment design for interference.

PubMed

Yuan, Changzheng; Lv, Jun; VanderWeele, Tyler J

2013-01-01

Relatively little is known about the peer influence in health behaviors within university dormitory rooms. Moreover, in China, the problem of unhealthy behaviors among university students has not yet been sufficiently recognized. We thus investigated health behavior peer influence in Peking University dormitories utilizing a randomized cluster-assignment design. Cross-sectional in-dormitory survey. Current students from Peking University Health Science Center from April to June, 2009. Self-reported questionnaire on health behaviors: physical activity (including bicycling), dietary intake and tobacco use. Use of bicycle, moderate-intensity exercise, frequency of sweet food and soybean milk intake, frequency of roasted/baked/toasted food intake were behaviors significantly or marginally significantly affected by peer influence. Health behavior peer effects exist within dormitory rooms among university students. This could provide guidance on room assignment, or inform intervention programs. Examining these may demand attention from university administrators and policy makers.

Intention to Seek Mental Health Treatment for Adolescent Girls: Comparison of Predictors in Mothers and Daughters

PubMed Central

Logsdon, M. Cynthia; Pinto, Melissa D.; LaJoie, A. Scott; Hertweck, Paige; Lynch, Tania; Flamini, Laura

2013-01-01

PROBLEM To examine predictors of intention to seek mental health treatment for adolescent girls in mothers and daughters. METHODS In this cross-sectional study, mothers and adolescent daughters (n = 71) completed measures of behavioral attitudes, subjective norms, perceived behavioral control, and intention to seek mental health treatment for the adolescent daughter. FINDINGS Behavioral attitude and perceived behavioral control predicted intention to seek mental health treatment among mothers. Behavioral attitude predicted intention among daughters. There were no associations between mothers and daughters on study variables. CONCLUSIONS To promote shared decision making and engagement in mental health treatment, clinicians may target interventions to the mother’s perceived behavioral control and behavioral attitudes of daughters and mothers. Based upon study results, clinicians should promote shared decision making and concordance between mothers and daughters on attitudes toward mental health treatment. PMID:24180603

HIV Risky Sexual Behaviors and HIV Infection Among Immigrants: A Cross-Sectional Study in Lisbon, Portugal

PubMed Central

Dias, Sónia; Marques, Adilson; Gama, Ana; Martins, Maria O.

2014-01-01

This study aimed to examine risky sexual behavior, its associated factors and HIV infection among immigrants. A participatory cross-sectional survey was conducted with 1187 immigrants at the National Immigrant Support Centre, in Lisbon (52.2% female; 34.0% Africans, 33.8% Brazilians, 32.2% Eastern Europeans). About 38% of participants reported ≥2 sexual partners in the previous year, 16.2% both regular and occasional sexual partners (last 12 months), 33.1% inconsistent condom use with occasional partners, and 64% no condom use in the last sexual intercourse. Unprotected sex in the last sexual intercourse was more likely among women, Africans, those older, with elementary education, those married and those who didn’t receive free condoms in the previous year. No condom use was less likely among those having only occasional sexual partners and both regular and occasional sexual partners. One third of participants had never been tested for HIV. Those never tested reported more frequently inconsistent condom use than those ever tested. Overall, 2.0% reported being HIV positive (2.5% of men; 4.4% of Africans); 4.3% admitted having a STI in previous year. HIV-positive immigrants reported high-risk sexual behaviors. Tailored interventions to promote awareness of HIV serostatus among immigrants as well as culturally adapted risk reduction strategies should be strengthened. PMID:25141001

Predictors of condom use behaviors based on the Health Belief Model (HBM) among female sex workers: a cross-sectional study in Hubei Province, China.

PubMed

Zhao, Jinzhu; Song, Fujian; Ren, Shuhua; Wang, Yan; Wang, Liang; Liu, Wei; Wan, Ying; Xu, Hong; Zhou, Tao; Hu, Tian; Bazzano, Lydia; Sun, Yi

2012-01-01

HIV infection related to commercial sexual contact is a serious public health issue in China. The objectives of the present study are to explore the predictors of condom use among female sex workers (FSWs) in China and examine the relationship between Health Belief Model (HBM) constructs. A cross-sectional study was conducted in two cities (Wuhan and Suizhou) in Hubei Province, China, between July 2009 and June 2010. A total of 427 FSWs were recruited through mediators from the 'low-tier' entertainment establishments. Data were obtained by self-administered questionnaires. Structural equation models were constructed to examine the association. We collected 363 valid questionnaires. Within the context of HBM, perceived severity of HIV mediated through perceived benefits of condom use had a weak effect on condom use (r=0.07). Perceived benefits and perceived barriers were proximate determinants of condom use (r=0.23 and r=-0.62, respectively). Self-efficacy had a direct effect on perceived severity, perceived benefits, and perceived barriers, which was indirectly associated with condom use behaviors (r=0.36). The HBM provides a useful framework for investigating predictors of condom use behaviors among FSWs. Future HIV prevention interventions should focus on increasing perceived benefits of condom use, reducing barriers to condoms use, and improving self-efficacy among FSWs.

Applying Multi-Theory Model (MTM) of Health Behavior Change to Predict Water Consumption Instead of Sugar-Sweetened Beverages.

PubMed

Sharma, Manoj; Catalano, Hannah Priest; Nahar, Vinayak K; Lingam, Vimala C; Johnson, Paul; Ford, M Allison

2017-02-25

A substantial proportion of college students to not drink enough water and consume sugar-sweetened beverages (SSBs). Consumption of SSBs is associated with weight gain, obesity, type 2 diabetes mellitus, dental carries, and increased risk for cardiovascular disease. Hence, the purpose of this study was to use the multi-theory model (MTM) in predicting initiation and sustenance of plain water consumption instead of sugar-sweetened beverages among college students. A cross-sectional study. In this cross-sectional study, a 37-item valid and reliable MTM-based survey was administered to college students in 2016 via Qualtrics at a large public university in the Southeastern United States. Overall, 410 students responded to the survey; of those, 174 were eligible for the study and completed it. Stepwise multiple regression analysis revealed that 61.8% of the variance in the initiation of drinking plain water instead of SSBs was explained by behavioral confidence (P<0.001) and changes in the physical environment (P<0.001). Further, 58.3% of the variance in the sustenance of drinking plain water instead of SSBs was explained by emotional transformation (P<0.001) and practice for change (P=0.001). Multi-theory model of health behavior change is a robust theory for predicting plain water consumption instead of SSBs in college students. Interventions should be developed based on this theory for this target population.

Attitudes, knowledge and behavior of Japanese physical therapists with regard to evidence-based practice and clinical practice guidelines: a cross-sectional mail survey

PubMed Central

Fujimoto, Shuhei; Kon, Noriko; Takasugi, Jun; Nakayama, Takeo

2017-01-01

[Purpose] This study aimed to investigate Japanese physical therapists’ attitudes of evidence-based practice and clinical practice guidelines. [Subjects and Methods] In 2014, a cross-sectional postal mail survey using a self-administered questionnaire was conducted. Of 2,982 physical therapists belonging to the Chiba Prefecture Physical Therapist Association, 1,000 were randomly selected. The questionnaire comprised 42 items pertaining to the attitudes of and behavior toward evidence-based practice and clinical practice guidelines. It was investigated to reveal the relationship between clinical practice guidelines/evidence-based practice and therapist characteristics. [Results] The response rate was 39.6%, and 384 questionnaires were available. The main results were as follows: 83.3% participants agreed to the importance of evidence-based practice, 77.1% agree to that evidence-based practice supports clinical decision of physical therapists, and about 11% agreed to have been educated about evidence-based practice. Then, 29.2% used, 54.9% agreed to the importance of, and 13.3% agreed to the utility of clinical practice guidelines. An important factor related mostly to a positive attitude, knowledge and behavior of evidence-based practice and clinical practice guidelines was participating in research activities. [Conclusion] Many of physical therapists do not use and understand the importance of clinical practice guidelines. Participating in research activities may partially contribute to improving these conditions. PMID:28265139

Adolescent Bullying Involvement and Psychosocial Aspects of Family and School Life: A Cross-Sectional Study from Guangdong Province in China

PubMed Central

Lu, Ciyong; Wu, Jie; Deng, Xueqing; Hong, Lingyao; Gao, Xue; He, Yuan

2012-01-01

Background School bullying is an emerging problem in China. The present study aimed to measure the prevalence of bullying behaviors among Chinese adolescents and to examine the association of bullying and being bullied with family factors, school factors and indicators of psychosocial adjustment. Methods A cross-sectional study was conducted. A total of 8,342 middle school students were surveyed in four cities in the Guangdong Province. Self-reports on bullying involvement and information regarding family factors, school factors and psychosocial adjustment were collected. Descriptive statistics and multi-level logistic regression analysis were used to evaluate the prevalence of school bullying and explore potentially influential factors. Results Of the total sample, 20.83% (1,738) reported being involved in bullying behaviors. Of the respondents, 18.99% were victims of bullying, 8.60% were bullies and 6.74% both bullied themselves and bullied others. Factors that were determined to be correlated with bullying behaviors included grade, parental caring, consideration of suicide, running away from home, time spent online per day and being in a physical fight. Conclusion Bullying was determined to be prevalent among Chinese adolescents. Given the concurrent psychosocial adjustment, family and school factors associated with bullying, as well as the potential long-term negative outcomes for these youth, this issue merits serious attention, both for future research and preventive intervention. PMID:22815693

Transfer couplings and hindrance far below the barrier for 40 Ca + 96 Zr

DOE PAGES

Stefanini, A. M.; Montagnoli, G.; Esbensen, H.; ...

2015-01-29

The sub-barrier fusion excitation function of 40Ca + 96Zr has been measured down to cross sections ≃2.4µb, i.e. two orders of magnitude smaller than obtained in the previous experiment, where the sub-barrier fusion of this system was found to be greatly enhanced with respect to 40Ca + 90Zr, and the need of coupling to transfer channels was suggested. The purpose of this work was to investigate the behavior of 40Ca + 96Zr fusion far below the barrier. The smooth trend of the excitation function has been found to continue, and the logarithmic slope increases very slowly. No indication of hindrancemore » shows up, and a comparison with 48Ca + 96Zr is very useful in this respect. A new CC analysis of the complete excitation function has been performed, including explicitly one- and two-nucleon Q >0 transfer channels. Such transfer couplings bring significant cross section enhancements, even at the level of a few µb. Locating the hindrance threshold, if any, in 40Ca + 96Zr would require challenging measurements of cross sections in the sub-µb range.« less

Measurement of the top anti-top quark pair production cross-section in the [tau] + jets channel at [square root of s] = 7 TeV using ATLAS detector

NASA Astrophysics Data System (ADS)

Rashid, Teeba

Large Hadron Collider (LHC) is a top quark factory, which is the heaviest elementary particle discovered so far. Due to its small life-time top quark decays before hadronization, and hence most of its properties are not washed out. Top quark events are often a large background in many beyond the Standard Model scenarios. For this reason, a deep knowledge of its properties and behavior is of crucial importance in searches for new physics at the LHC. This dissertation describes a measurement of the top anti-top pair production cross-section in tau + jets channel. The measurement is obtained by using 4.7 fb-1 data collected in year 2011 by ATLAS detector from proton proton (pp) collisions at the center of mass energy s = 7 TeV. Selected events are required to have one isolated tau with missing transverse energy and hadronic jets, at least one of which must be originated from a b quark. The measured cross section is 152 +/- 12 (stat.) +28-30 (syst.); +/- 3(lumi.) pb, which is in agreement with standard model predictions.

Study of inclusive single-jet production in the framework of kt-factorization unintegrated parton distributions

NASA Astrophysics Data System (ADS)

Aminzadeh Nik, R.; Modarres, M.; Masouminia, M. R.

2018-05-01

The present work is intended to study the double-differential cross section of the inclusive single-jet production as the functions of the transverse momentum and the rapidity of the jet in the high-energy hadron-hadron collisions. The angular-ordering-constraint kt-factorization framework is used to calculate the above cross section that is available experimentally. The conditions are taken in accordance with the LHC experiments. The results are compared and analyzed using the existing CMS LHC data. The scheme-dependent unintegrated parton distribution functions (UPDF) of Kimber-Martin-Ryskin (KMR) and Martin-Ryskin-Watt (MRW) in the leading-order and the next-to-leading order (NLO) are used to predict the input partonic UPDF. The utilized phenomenological frameworks prove to be relatively successful in generating satisfactory results compared to the different experiment data, such as CMS (8 and 13 TeV). Extensive discussions and comparisons are made regarding the behavior of the contributing partonic subprocesses. Finally, it is shown that the application of the KMR UPDF to the single-jet differential cross sections have better agreement with the CMS data; on the other hand, they are very similar to those of NLO-MRW.

Cross-sectional data on alcohol and marijuana use and sexual behavior among male and female secondary school students in New Providence, The Bahamas.

PubMed

Kaljee, Linda; Wang, Bo; Deveaux, Lynette; Lunn, Sonja; Rolle, Glenda; Villar, Maria Elena; Stanton, Bonita

2016-05-01

While The Bahamas have significantly reduced poor reproductive health outcomes among adolescents and emerging adults, data indicate that youth are engaged in sexual risk behaviors. Substance use has been linked to increased risk for HIV and sexually transmitted infections in other contexts. There are limited data on Bahamian youth in relation to consumption of alcohol and marijuana use and engagement in sexual behaviors. This study aimed to assess potential relationships between alcohol and marijuana use and engagement in sexual behavior among government secondary school students in New Providence, The Bahamas. Total sample size was 2572, and about 56% of respondents were female. Mean age was 14.2 (SD 2.7 years). Cross-sectional data came from a baseline survey conducted as part of a longitudinal randomized controlled evaluation of a school-based HIV prevention and reproductive health program in New Providence. Overall, 46.5% (519) males and 44.8% (652) females reported alcohol consumption; 7.3% (82) males and 1.7% (25) females reported use of marijuana in the last 6 months. About 43% (477) male respondents and 16% (231) female respondents reported ever having vaginal sex. Logistic regression analysis indicates that increased likelihood of engaging in sex during the past 6 months is associated with being older, male, and consuming alcohol and marijuana. These data provide a 'global correlation' between substance use and engagement in sexual behaviors among Bahamian adolescents. Longitudinal research is needed to assess event specific risks and identify mediating and moderating factors. These findings indicate the importance of integrating reproductive health and substance use education.

Sheehan Suicidality Tracking Scale (S-STS): reliability, convergent and discriminative validity in young Italian adults.

PubMed

Preti, Antonio; Sheehan, David V; Coric, Vladimir; Distinto, Marco; Pitanti, Mirko; Vacca, Irene; Siddi, Alessandra; Masala, Carmelo; Petretto, Donatella Rita

2013-10-01

The Sheehan Suicidality Tracking Scale (S-STS) is a patient self-report or clinician-administered rating scale that tracks spontaneous and treatment-emergent suicidal ideation and behaviors. This study set out to evaluate the reliability, convergent and divergent validity of the S-STS in a sample of college students, a population with a high risk of completed and attempted suicide. Cross-sectional, survey design. Participants (303 undergraduate students; males: 42%) completed several measures assessing psychological distress (General Health Questionnaire; GHQ); self-esteem (Rosenberg Self Esteem Scale; RSES); social support (Modified Social Support Survey; MOSSS); and suicidal behavior, including ideation and attempts (S-STS). Both internal consistency and test-retest stability were excellent for the S-STS-global score. The S-STS subscale on suicide ideation also showed good reliability, while the subscale on suicidal behavior showed some inconsistency at retest. Convergent and divergent validity of S-STS was confirmed. All S-STS items loaded on a single factor, which had an excellent fit for the unidimensional model, thus justifying the use of the S-STS as a screening tool. In a mediation model, self-esteem and social support explained 45% of the effects of psychological distress on suicide ideation and behavior as measured by the S-STS-global score. This study provided promising evidence on the convergent, divergent, internal consistency and test-retest stability of the Sheehan Suicidality Tracking Scale. The cross-sectional design and lack of measures of hopelessness and helplessness prevent any conclusion about the links of suicidal behavior with self-esteem and social support. Copyright © 2013 Elsevier Inc. All rights reserved.

Factors associated with physical therapists' implementation of physical activity interventions in The Netherlands.

PubMed

Huijg, Johanna M; Dusseldorp, Elise; Gebhardt, Winifred A; Verheijden, Marieke W; van der Zouwe, Nicolette; Middelkoop, Barend J C; Duijzer, Geerke; Crone, Mathilde R

2015-04-01

Physical therapists play an important role in the promotion of physical activity (PA) and the effectiveness of PA interventions. However, little is known about the extent to which they implement PA interventions following the intervention protocol and about the factors influencing their implementation behaviors. The study objective was to investigate physical therapists' implementation fidelity regarding PA interventions, including completeness and quality of delivery, and influencing factors with a Theoretical Domains Framework-based questionnaire. The study was based on a cross-sectional design. A total of 268 physical therapists completed the Determinants of Implementation Behavior Questionnaire. Questions about completeness and quality of delivery were based on components and tasks of PA interventions as described by the Royal Dutch Society for Physical Therapy. Multilevel regression analyses were used to identify factors associated with completeness and quality of delivery. High implementation fidelity was found for the physical therapists, with higher scores for completeness of delivery than for quality of delivery. Physical therapists' knowledge, skills, beliefs about capabilities and consequences, positive emotions, behavioral regulation, and the automaticity of PA intervention delivery were the most important predictors of implementation fidelity. Together, the Theoretical Domains Framework accounted for 23% of the variance in both total completeness and total quality scores. The cross-sectional design precluded the determination of causal relationships. Also, the use of a self-report measure to assess implementation fidelity could have led to socially desirable responses, possibly resulting in more favorable ratings for completeness and quality. This study enhances the understanding of how physical therapists implement PA interventions and which factors influence their behaviors. Knowledge about these factors may assist in the development of strategies to improve physical therapists' implementation behaviors. © 2015 American Physical Therapy Association.

Sensation seeking as a common factor in opioid dependent subjects and high risk sport practicing subjects. A cross sectional study.

PubMed

Franques, P; Auriacombe, M; Piquemal, E; Verger, M; Brisseau-Gimenez, S; Grabot, D; Tignol, J

2003-03-01

Animal research has outlined a vulnerability trait to drug dependence like behavior. The behavioral characteristic of this vulnerability is hyperactivity in response to a novel environment of which sensation seeking (SS) has been suggested as a possible equivalent in humans. If this is the case, SS should be more frequent in drug dependent and risky sports practicing subjects then controls. The objective of this study was to determine if opioid dependent subjects (ODS) and regular paragliders (RP) would be more SS then normal controls. Cross sectional study. Three groups of 34 individuals (total 102) matched for age and sex were selected from ODS seeking treatment, a paragliding club, and a college staff. Global and sub-scores of the Zuckerman sensation seeking scale (SSS). Non parametric statistics (Kruskal Wallis and Wilcoxon 2-Sample Tests) were used given the non-normal distribution of SSS scores in the ODS and RP groups. Significant differences were found across the three groups for the Thrill and Adventure Seeking (TAS) (P = 0.001), dishinibition (Dis) (P = 0.0003) and total score (P = 0.001). ODS and RP scored significantly higher than controls on two (Dis and the TAS scales). RP also scored significantly higher on the Boredom Susceptibility (BS) scale (P = 0.04). Our results show that RP and ODS differ from controls and have some similarities based on the SSS. In this study, the ODS and the RP could express different forms of a general tendency to seek intense and abrupt sensations through various behaviors. Our results in humans are in favor of the hypothesis that the behavioral trait of vulnerability to drug dependence behavior is expressed through SS. Copyright 2002 Elsevier Science Ireland Ltd.

Cross-sectional data on alcohol and marijuana use and sexual behavior among male and female secondary school students in New Providence, The Bahamas

PubMed Central

Kaljee, Linda; Wang, Bo; Deveaux, Lynette; Lunn, Sonja; Rolle, Glenda; Villar, Maria Elena; Stanton, Bonita

2015-01-01

Background While The Bahamas have significantly reduced poor reproductive health outcomes among adolescents and emerging adults, data indicate that youth are engaged in sexual risk behaviors. Substance use has been linked to increased risk for HIV and STIs in other contexts. There is limited data on Bahamian youth in relation to consumption of alcohol and use marijuana and engagement in sexual behaviors. Objective To assess potential relationships between alcohol and marijuana use and engagement in sexual behavior among government secondary school students in New Providence, The Bahamas. Subjects Total sample size was 2,572. Fifty-six percent of respondents were female. Mean age was 14.2 (SD 2.7 years). Methods Cross-sectional data are from a baseline survey conducted as part of a longitudinal randomized controlled evaluation of a school-based HIV prevention and reproductive health program in New Providence. Results Overall, 46.5% (519) males and 44.8% (652) females reported alcohol consumption; 7.3% (82) males and 1.7% (25) females reported use of marijuana in the last six months. Forty-three percent (477) male respondents and 16% (231) female respondents reported ever having vaginal sex. Logistic regression analysis indicates increased likelihood of engaging in sex during the past six months is associated with being older, male, and consuming alcohol and marijuana. Conclusion These data provide a ‘global correlation’ between substance use and engagement in sexual behaviors among Bahamian adolescents. Longitudinal research is needed to assess event specific risks and identify mediating and moderating factors. These findings indicate the importance of integrating reproductive health and substance use education. PMID:25781669

Bullying in the American Graduate Medical Education System: A National Cross-Sectional Survey

PubMed Central

2016-01-01

Objectives To deliver an estimate of bullying among residents and fellows in the United States graduate medical education system and to explore its prevalence within unique subgroups. Design/Setting/Participants A national cross-sectional survey from a sample of residents and fellows who completed an online bullying survey conducted in June 2015. The survey was distributed using a chain sampling method that relied on electronic referrals from 4,055 training programs, with 1,791 residents and fellows completing the survey in its entirety. Survey respondents completed basic demographic and programmatic information plus four general bullying and 20 specific bullying behavior questions. Between-group differences were compared for demographic and programmatic stratifications. Main Outcomes/Measures Self-reported subjected to workplace bullying from peers, attendings, nurses, ancillary staff, or patients in the past 12 months. Results Almost half of the respondents (48%) reported being subjected to bullying although both those subjected and not subjected reported experiencing ≥ 1 bullying behaviors (95% and 39% respectively). Attendings (29%) and nurses (27%) were the most frequently identified source of bullying, followed by patients, peers, consultants and staff. Attempts to belittle and undermine work and unjustified criticism and monitoring of work were the most frequently reported bullying behaviors (44% each), followed by destructive innuendo and sarcasm (37%) and attempts to humiliate (32%). Specific bullying behaviors were more frequently reported by female, non-white, shorter than < 5’8 and BMI ≥ 25 individuals. Conclusions/Relevance Many trainees report experiencing bullying in the United States graduate medical education programs. Including specific questions on bullying in the Accreditation Council for Graduate Medical Education annual resident/fellow survey, implementation of anti-bullying policies, and a multidisciplinary approach engaging all stakeholders may be of great value to eliminate these pervasive behaviors in the field of healthcare. PMID:26982705

Promoting energy-balance behaviors among ethnically diverse adolescents: overview and baseline findings of The Central Texas CATCH Middle School Project.

PubMed

Springer, Andrew E; Kelder, Steven H; Byrd-Williams, Courtney E; Pasch, Keryn E; Ranjit, Nalini; Delk, Joanne E; Hoelscher, Deanna M

2013-10-01

The Central Texas Coordinated Approach To Child Health (CATCH) Middle School Project is a 3.5-year school-based project aimed at promoting physical activity (PA), healthy eating, and obesity prevention among public middle school students in Texas. This article describes the CATCH intervention model and presents baseline findings from spring 2009. CATCH comprises six core components: CATCH Team, CATCH PE, CATCH Classroom, CATCH Eat Smart Cafeteria, CATCH Family, and CATCH Social Marketing. A group randomized serial cross-sectional design is being employed to test the effect of three program support conditions (n = 10 schools each) on energy-balance behaviors: Basic (training and curriculum only), Basic Plus (training and curriculum plus CATCH facilitator support), and Basic Plus Social Marketing (all inputs plus social marketing component). The study sample is composed of a cross-sectional sample of eighth-grade students (primary outcome evaluation sample) and sixth- and seventh-grade students (PE process evaluation sample) who are selected and measured each year. At baseline, 37.9% of eight-grade students (n = 2,841; 13.9 years) were overweight/obese and 19.2% were obese. Eighth-grade students reported, on average, consuming sugar-sweetened beverages more than two times on the previous day and fruits and vegetables roughly three times on the previous day; only two of five school districts surpassed the recommended 50% cut-point for class time spent in moderate-and-vigorous PA as measured in classes of sixth- and seventh-grade students. Additional behavioral findings are reported. Body mass index and behaviors were comparable across conditions. Baseline findings underscore the need to promote student energy-balance behaviors.

Sex tourism among Chinese men who have sex with men: a cross-sectional observational study.

PubMed

Mao, Jessica; Tang, Weiming; Liu, Chuncheng; Wong, Ngai Sze; Tang, Songyuan; Wei, Chongyi; Tucker, Joseph D

2018-03-02

Sex tourism among men who have sex with men (MSM) may exacerbate transmission of HIV and other sexually transmitted infections (STIs). Sex tourism is defined as purchasing sex with gifts or money outside of one's hometown. Our objective was to characterize the frequency, socio-demographic characteristics, and sexual risk behaviors among Chinese MSM sex tourists. An online, cross-sectional survey for high-risk MSM throughout China was conducted in November 2015 covering sociodemographic characteristics, sexual risk behaviors, and sex tourism. Univariate and multivariable logistic regressions were performed to identify correlates of sex tourism. The mean MSM HIV prevalence of sex tourism journey origins and destinations were compared. Of 1189 MSM who completed the survey, 62 (5%) men identified as sex tourists; among these sex tourists, twenty (32%) traveled primarily to purchase sex and the remainder purchased sex while traveling for another purpose. There was minimal socio-demographic and behavioral difference between the two groups. In multivariable analyses, adjusting for age and income, sex tourism was correlated with high-risk sexual behaviors, higher income (aOR 4.44, 95%CI 1.77-11.18) and living with HIV (aOR 2.79, 95%CI 1.03-7.55). Sex tourism was more often from locations with lower to higher MSM HIV prevalence (mean = 4.47, SD = 2.01 versus mean = 6.86, SD = 5.24). MSM sex tourists were more likely to have risky sexual behaviors and travel to locations with a higher HIV prevalence. MSM sex tourists may be part of core groups that are disproportionately responsible for MSM HIV transmission. Enhanced surveillance and interventions tailored to MSM sex tourists should be considered.

Predicting Physical Activity and Healthy Nutrition Behaviors Using Social Cognitive Theory: Cross-Sectional Survey among Undergraduate Students in Chongqing, China.

PubMed

Xu, Xianglong; Pu, Yang; Sharma, Manoj; Rao, Yunshuang; Cai, Yilin; Zhao, Yong

2017-11-05

(1) Background: Generally suggested public health measures to reduce obesity were to limit television (TV) viewing, enhance daily physical activities, enable the consumption of fruit and vegetables, and reduce sugar-sweetened beverage intake. This study analyzed the extent to which selected social cognitive theory constructs can predict these behaviors among Chinese undergraduate students. (2) Methods: This cross-sectional study included 1976 undergraduate students from six universities in Chongqing, China. A self-administered five-point Likert common physical activity and nutrition behavior scale based on social cognitive theory was utilized. (3) Results: This study included 687 (34.77%) males and 1289 (65.23%) females. A total of 60.14% of the students engaged in exercise for less than 30 min per day. Approximately 16.5%of the participants spent at least 4 h watching TV and sitting in front of a computer daily. Approximately 79% of the participants consumed less than five cups of fruit and vegetables daily. Undergraduate students who had high self-efficacy scores had more leisure time physical activities. Those who have high expectation scores had considerable time watching TV and sitting in front of a computer. Undergraduate students who had high expectation and self-efficacy scores had substantially low consumption of sugar-sweetened beverages. Those who had high self-efficacy scores consumed considerable amounts of fruit and vegetables. Furthermore, the type of university, BMI group, gender, age, lack of siblings, and grade level were associated with the aforementioned four behaviors. (4) Conclusion: Physical inactivity and unhealthy nutrition behaviors are common among undergraduate students. This study used social cognitive theory to provide several implications for limiting the TV viewing, enhancing daily physical activities, consuming fruit and vegetables, and reducing sugar-sweetened beverage intake among undergraduate students.

Race/Ethnicity and gender differences in health intentions and behaviors regarding exercise and diet for adults with type 2 diabetes: A cross-sectional analysis

PubMed Central

2011-01-01

Background Self-management is the cornerstone of diabetes control and prevention of complications; however, it is undetermined whether differences in intention to adopt healthy lifestyles and actual healthy behavior exist across race/ethnic groups. This study evaluated the differences across racial-ethnic groups in self-reported medical advice received and health intentions and behaviors among adults with type 2 diabetes mellitus. Methods A cross-sectional analysis of the 2007 SHIELD US survey ascertained self-reported health intentions and behaviors for regular exercise, diet, and weight management among Non-Hispanic Caucasian (n = 2526), Non-Hispanic African-American (n = 706), and Hispanic (n = 179) respondents with type 2 diabetes. Results A similar proportion of respondents from each race-gender group (43%-56%) reported receiving healthcare advice to increase their exercise (P = 0.32). Significantly more minorities reported an intention to follow the exercise recommendation compared with Non-Hispanic Caucasians (P = 0.03). More Non-Hispanic African-American (29%) and Hispanic (27%) men reported exercising regularly compared with other race-gender groups (P = 0.02). Significantly more Non-Hispanic Caucasian women (74%) and Hispanic women (79%) reported trying to lose weight compared with other groups (P < 0.0001). Conclusions Differences in health intentions and healthy behaviors were noted across race-gender groups. More Non-Hispanic African-American men reported an intention to follow advice on exercising and self-report of exercising regularly was also higher compared with other race-gender groups. More Hispanic men reported high physical activity levels than other groups. Despite an increased willingness to follow healthcare recommendations for diet, >50% of respondents were obese among all race-gender groups. PMID:21729303

Predicting Physical Activity and Healthy Nutrition Behaviors Using Social Cognitive Theory: Cross-Sectional Survey among Undergraduate Students in Chongqing, China

PubMed Central

Pu, Yang; Sharma, Manoj; Rao, Yunshuang; Cai, Yilin; Zhao, Yong

2017-01-01

(1) Background: Generally suggested public health measures to reduce obesity were to limit television (TV) viewing, enhance daily physical activities, enable the consumption of fruit and vegetables, and reduce sugar-sweetened beverage intake. This study analyzed the extent to which selected social cognitive theory constructs can predict these behaviors among Chinese undergraduate students. (2) Methods: This cross-sectional study included 1976 undergraduate students from six universities in Chongqing, China. A self-administered five-point Likert common physical activity and nutrition behavior scale based on social cognitive theory was utilized. (3) Results: This study included 687 (34.77%) males and 1289 (65.23%) females. A total of 60.14% of the students engaged in exercise for less than 30 min per day. Approximately 16.5% of the participants spent at least 4 h watching TV and sitting in front of a computer daily. Approximately 79% of the participants consumed less than five cups of fruit and vegetables daily. Undergraduate students who had high self-efficacy scores had more leisure time physical activities. Those who have high expectation scores had considerable time watching TV and sitting in front of a computer. Undergraduate students who had high expectation and self-efficacy scores had substantially low consumption of sugar-sweetened beverages. Those who had high self-efficacy scores consumed considerable amounts of fruit and vegetables. Furthermore, the type of university, BMI group, gender, age, lack of siblings, and grade level were associated with the aforementioned four behaviors. (4) Conclusion: Physical inactivity and unhealthy nutrition behaviors are common among undergraduate students. This study used social cognitive theory to provide several implications for limiting the TV viewing, enhancing daily physical activities, consuming fruit and vegetables, and reducing sugar-sweetened beverage intake among undergraduate students. PMID:29113089

Race/Ethnicity and gender differences in health intentions and behaviors regarding exercise and diet for adults with type 2 diabetes: a cross-sectional analysis.

PubMed

Gavin, James R; Fox, Kathleen M; Grandy, Susan

2011-07-05

Self-management is the cornerstone of diabetes control and prevention of complications; however, it is undetermined whether differences in intention to adopt healthy lifestyles and actual healthy behavior exist across race/ethnic groups. This study evaluated the differences across racial-ethnic groups in self-reported medical advice received and health intentions and behaviors among adults with type 2 diabetes mellitus. A cross-sectional analysis of the 2007 SHIELD US survey ascertained self-reported health intentions and behaviors for regular exercise, diet, and weight management among Non-Hispanic Caucasian (n = 2526), Non-Hispanic African-American (n = 706), and Hispanic (n = 179) respondents with type 2 diabetes. A similar proportion of respondents from each race-gender group (43%-56%) reported receiving healthcare advice to increase their exercise (P = 0.32). Significantly more minorities reported an intention to follow the exercise recommendation compared with Non-Hispanic Caucasians (P = 0.03). More Non-Hispanic African-American (29%) and Hispanic (27%) men reported exercising regularly compared with other race-gender groups (P = 0.02). Significantly more Non-Hispanic Caucasian women (74%) and Hispanic women (79%) reported trying to lose weight compared with other groups (P < 0.0001). Differences in health intentions and healthy behaviors were noted across race-gender groups. More Non-Hispanic African-American men reported an intention to follow advice on exercising and self-report of exercising regularly was also higher compared with other race-gender groups. More Hispanic men reported high physical activity levels than other groups. Despite an increased willingness to follow healthcare recommendations for diet, >50% of respondents were obese among all race-gender groups.

Cross-sectional study of social behaviors in preschool children and exposure to flame retardants.

PubMed

Lipscomb, Shannon T; McClelland, Megan M; MacDonald, Megan; Cardenas, Andres; Anderson, Kim A; Kile, Molly L

2017-03-09

Children are exposed to flame retardants from the built environment. Brominated diphenyl ethers (BDE) and organophosphate-based flame retardants (OPFRs) are associated with poorer neurocognitive functioning in children. Less is known, however, about the association between these classes of compounds and children's emotional and social behaviors. The objective of this study was to determine if flame retardant exposure was associated with measurable differences in social behaviors among children ages 3-5 years. We examined teacher-rated social behaviors measured using the Social Skills Improvement Rating Scale (SSIS) and personal exposure to flame retardants in children aged 3-5 years who attended preschool (n = 72). Silicone passive samplers worn for 7 days were used to assess personal exposure to 41 compounds using gas chromatography-mass spectrophotometer. These concentrations were then summed into total BDE and total OPFR exposure prior to natural log transformation. Separate generalized additive models were used to evaluate the relationship between seven subscales of the SSIS and lnΣBDE or lnΣOPFR adjusting for other age, sex, adverse social experiences, and family context. All children were exposed to a mixture of flame retardant compounds. We observed a dose dependent relationship between lnΣOPFR and two subscales where children with higher exposures were rated by their preschool teachers as having less responsible behavior (p = 0.07) and more externalizing behavior problems (p = 0.03). Additionally, children with higher lnΣBDE exposure were rated by teachers as less assertive (p = 0.007). We observed a cross-sectional association between children's exposure to flame retardant compounds and teacher-rated social behaviors among preschool-aged children. Children with higher flame retardant exposures exhibited poorer social skills in three domains that play an important role in a child's ability to succeed academically and socially.

Major depressive disorder and suicidal behavior among urban dwelling Ethiopian adult outpatients at a general hospital.

PubMed

Whittier, Anjalene B; Gelaye, Bizu; Deyessa, Negussie; Bahretibeb, Yonas; Kelkile, Teshome Shibre; Berhane, Yemane; Williams, Michelle A

2016-06-01

We sought to evaluate the prevalence and correlates of major depressive disorder (MDD) and suicidal behavior among urban dwelling Ethiopian adults. This was a cross-sectional study of 1097 outpatient adults (≥18 years of age) in a major hospital in Addis Ababa, Ethiopia. Sociodemographic and lifestyle characteristics were collected via structured interviews. MDD and suicidal behavior were assessed using the Composite International Diagnostic Interview (CIDI) among all study participants. Multivariable logistic regression models were fitted to estimate odds ratios (OR) and 95% confidence intervals (95% CI). Prevalence estimates for lifetime and 12-month MDD were 18.0% and 6.7%, respectively. The prevalence of suicidal behavior during the previous year (i.e., suicidal ideation, plan or attempt) was 15.2% with approximately 4% having reported attempts. Overall, women were more likely to report suicidal behavior (17.8%) than men (11.3%). MDD odds were 1.53-fold higher among women as compared with men (aOR=1.53, 95% CI 1.05-2.23). Lifetime MDD was significantly associated with age, sex, marital status, and self-reported physical health. Participants reporting poor mental health had approximately 3-fold increased odds of MDD (OR=2.93; 95%CI: 1.05-2.23); those between 35 and 44 years old (aOR=1.92; 95%CI: 1.06-3.49) and those older than 55 years (aOR=2.54; 95%CI: 1.16-5.57) had higher odds of MDD. Similarly suicidal behavior was significantly associated with sex, marital status, and self-reported physical and mental health. This cross-sectional study utilized self-reported data from outpatients. Causality cannot be inferred, and results may not be fully generalizable. Overall results show that MDD and suicidal behavior are highly prevalent among urban-dwelling Ethiopian adults. Women and middle-age adults constitute a high-risk group and may therefore benefit from targeted interventions. Copyright © 2016 Elsevier B.V. All rights reserved.

The mediating role of self-efficacy in the relationship between premotivational cognitions and engagement in multiple health behaviors: a theory-based cross-sectional study among township residents in South Africa

PubMed Central

Tshuma, Ndumiso; Muloongo, Keith; Nkwei, Emile S; Alaba, Olufunke A; Meera, Maheedhariah S; Mokgobi, Maboe G; Nyasulu, Peter S

2017-01-01

Background Noncommunicable diseases (NCDs) are one of the major global health challenges in developed countries and are rapidly increasing globally. Perception of self-efficacy is important for complex activities and long-term changes in health behavior. This study aimed to determine whether self-efficacy mediates the effect of individual beliefs (perceived severity, susceptibility, benefits and barriers) among informal settlement residents’ health behavior in relation to the prevention and management of NCDs. Methods A cross-sectional survey was conducted using a closed-ended questionnaire among informal settlement residents in Diepsloot, Johannesburg. The proposed model was tested using structural equation modeling (AMOS software). Results A total of 2,277 participants were interviewed during this survey, consisting of 1,236 (54.3%) females, with the majority of them aged between 20 and 29 years. All constructs in the questionnaire had a good reliability with a Cronbach’s alpha of >0.7. Perceived benefits and perceived barriers were the strongest predictors of self-efficacy, with the highest beta values of 0.14 and 0.15, respectively. Once associated with perceived self-efficacy, the direct effect of perceived susceptibility and perceived benefits on health behavior was statistically nonsignificant (P=0.0894 and P=0.2839, respectively). Perceived benefits and perceived susceptibility were totally mediated by self-efficacy. The indirect effects of perceived severity and perceived barriers (through self-efficacy) on health behavior were significant. Thus, perceived severity and perceived barriers were partially mediated by self-efficacy. Conclusion Perceived susceptibility and perceived benefits did not affect health behavior unless associated with self-efficacy. In contrast, individual perception of the seriousness of NCDs and perceived barriers might still have a direct influence on health behavior even if the person does not feel able to prevent NCDs. However, this influence would be more significant when perceived severity and perceived barriers of NCDs are associated with self-efficacy. PMID:28176923

The mediating role of self-efficacy in the relationship between premotivational cognitions and engagement in multiple health behaviors: a theory-based cross-sectional study among township residents in South Africa.

PubMed

Tshuma, Ndumiso; Muloongo, Keith; Nkwei, Emile S; Alaba, Olufunke A; Meera, Maheedhariah S; Mokgobi, Maboe G; Nyasulu, Peter S

2017-01-01

Noncommunicable diseases (NCDs) are one of the major global health challenges in developed countries and are rapidly increasing globally. Perception of self-efficacy is important for complex activities and long-term changes in health behavior. This study aimed to determine whether self-efficacy mediates the effect of individual beliefs (perceived severity, susceptibility, benefits and barriers) among informal settlement residents' health behavior in relation to the prevention and management of NCDs. A cross-sectional survey was conducted using a closed-ended questionnaire among informal settlement residents in Diepsloot, Johannesburg. The proposed model was tested using structural equation modeling (AMOS software). A total of 2,277 participants were interviewed during this survey, consisting of 1,236 (54.3%) females, with the majority of them aged between 20 and 29 years. All constructs in the questionnaire had a good reliability with a Cronbach's alpha of >0.7. Perceived benefits and perceived barriers were the strongest predictors of self-efficacy, with the highest beta values of 0.14 and 0.15, respectively. Once associated with perceived self-efficacy, the direct effect of perceived susceptibility and perceived benefits on health behavior was statistically nonsignificant ( P =0.0894 and P =0.2839, respectively). Perceived benefits and perceived susceptibility were totally mediated by self-efficacy. The indirect effects of perceived severity and perceived barriers (through self-efficacy) on health behavior were significant. Thus, perceived severity and perceived barriers were partially mediated by self-efficacy. Perceived susceptibility and perceived benefits did not affect health behavior unless associated with self-efficacy. In contrast, individual perception of the seriousness of NCDs and perceived barriers might still have a direct influence on health behavior even if the person does not feel able to prevent NCDs. However, this influence would be more significant when perceived severity and perceived barriers of NCDs are associated with self-efficacy.

Prevalence and associated factors of risky sexual behaviors among undergraduate students in state universities of Western Province in Sri Lanka: a descriptive cross sectional study.

PubMed

Perera, Upuli Amaranganie Pushpakumari; Abeysena, Chrishantha

2018-06-04

Risky sexual behaviors (RSB) are becoming an important problem all over the world. RSB are defined as behaviors leading to sexually transmitted diseases and unintended pregnancies. The objective of this study was to determine the prevalence and associated factors of RSB among undergraduate students in state universities of Western Province in Sri Lanka. A descriptive cross sectional study was conducted on1575 second and third year undergraduates using stratified cluster sampling of the selected universities. A pretested self-administered questionnaire was used to assess socio-demographic, knowledge attitudes and behavior on reproductive health. RSB was defined as reporting of one or more following behavior/s; having more than one sexual partner, use of alcohol or inability to use condom or other contraceptive methods in sexual activities. The results were expressed as prevalence and its 95% confidence interval (CI) of RSB. Multiple logistic regression was performed ascertain the association between RSB and possible associated factors. The results were expressed as adjusted odds ratios (AOR). Prevalence of RSB in last 1 year and 3 months periods were 12.4%, (95% CI: 11.8-13.1) and 12.1% (95% CI: 11.5-12.7) respectively. The significantly associated risk factors for RSB were, attended night clubs in last month (AOR = 3.58, 95% CI: 1.29-9.88), alcohol consumption within last 3 months (AOR = 2.67, 95% CI: 1.87-3.80) and good knowledge on condoms (AOR = 2.82, 95% CI: 1.94-4.10). Those who thought religion was very important to their lives (AOR = 0.68, 95% CI: 0.48-0.95) was a protective factor. Alcohol consumption and attending night clubs were associated with RSB. Necessary measures should be taken to reduce risk behaviors within university to reduce RSB.

Behavioral Risk Profile of Men Who Have Sex with Men in Beijing, China: Results from a Cross-sectional Survey with Randomized Response Techniques.

PubMed

Geng, Guo-Zhu; Gao, Ge; Ruan, Yu-Hua; Yu, Ming-Run; Zhou, Yun-Hua

2016-03-05

Human immunodeficiency virus (HIV) is spreading rapidly among men who have sex with men (MSM) in China. Anonymous questionnaires or direct interviews have been frequently used to study their behavior. The aim of the study was to describe the behavioral risk profile of the MSM in Beijing using the randomized response techniques (RRTs). A cross-sectional survey of sexual behavior among a sample of MSM was conducted in two HIV counseling and testing clinics in Beijing. The survey was carried out with an anonymous questionnaire containing sensitive questions on sexual behavior. To obtain the honest responses to the sensitive questions, three distinctive RRTs were used in the questionnaire: (1) Additive randomized response model for quantitative questions, (2) randomized response model for multiple choice questions, and (3) Simmons randomized response model for binomial questions. Formulae for the point estimate, variance, and confidence interval (CI) were provided for each specific model. Using RRTs in a sample of 659 participants, the mean age at first homosexual encounter was estimated to be 21.7 years (95% CI: 21.2-22.2), and each had sex with about three (2.9, 95% CI: 2.4-3.4) male partners on average in the past month. The estimated rate for consistent condom use was 56.4% (95% CI: 50.1-62.8%). In addition, condom was estimated to be used among 80.0% (95% CI: 74.1-85.9%) of the population during last anal sex with a male partner. Our study employed RRTs in a survey containing questions on sexual behavior among MSM, and the results showed that RRT might be a useful tool to obtain truthful feedback on sensitive information such as sexual behavior from the respondents, especially in traditional Chinese cultural settings.

Gender differences in and factors related to self-care behaviors: a cross-sectional, correlational study of patients with heart failure.

PubMed

Heo, Seongkum; Moser, Debra K; Lennie, Terry A; Riegel, Barbara; Chung, Misook L

2008-12-01

Although self-care may reduce exacerbations of heart failure, reported rates of effective self-care in patients with heart failure are low. Modifiable factors, including psychosocial status, knowledge, and physical factors, are thought to influence heart failure self-care, but little is known about their combined impact on self-care. The objective of this study was to identify factors related to self-care behaviors in patients with heart failure. A cross-sectional, correlational study design was used. One hundred twenty-two patients (77 men and 45 women, mean age 60+/-12 years old, 66% New York Heart Association functional class III/IV) were recruited from the outpatient clinics of an academic medical center and two community hospitals. Data on self-care behaviors (Self-Care of Heart Failure Index), depressive symptoms, perceived control, self-care confidence, knowledge, functional status, and social support were collected. Factors related to self-care were examined using hierarchical multiple regression. Mean self-care behavior scores were less than 70 indicating the majority of men and women with HF did not consistently engage in self-care behaviors. Higher self-care confidence and perceived control and better heart failure management knowledge were associated with better self-care (r2=.25, p<.001). Higher perceived control and better knowledge were related to better self-care behaviors in men (r2=.18, p=.001), while higher self-care confidence and poorer functional status were related to better self-care behaviors in women (r2=.35, p<.001). This study demonstrates the substantial impact of modifiable factors such as confidence in one's self-care abilities, perceived control, and knowledge on self-care behaviors. This study demonstrates that there are gender differences in factors affecting self-care, even though at baseline men and women have similar knowledge levels, physical, psychological, and behavioral status. Effective interventions focusing on modifiable factors and the unique characteristics of men and women should be provided to improve self-care behaviors in patients with heart failure.

School-Based Obesity-Prevention Policies and Practices and Weight-Control Behaviors among Adolescents.

PubMed

Larson, Nicole; Davey, Cynthia S; Caspi, Caitlin E; Kubik, Martha Y; Nanney, Marilyn S

2017-02-01

The promotion of healthy eating and physical activity within school settings is an important component of population-based strategies to prevent obesity; however, adolescents may be vulnerable to weight-related messages, as rapid development during this life stage often leads to preoccupation with body size and shape. This study examines secular trends in secondary school curricula topics relevant to the prevention of unhealthy weight-control behaviors; describes cross-sectional associations between weight-related curricula content and students' use of weight-control behaviors; and assesses whether implementation of school-based obesity-prevention policies/practices is longitudinally related to students' weight-control behaviors. The Minnesota School Health Profiles and Minnesota Student Survey (grades 9 and 12) data were used along with National Center for Education Statistics data to examine secular trends, cross-sectional associations (n=141 schools), and longitudinal associations (n=42 schools). Students self-reported their height and weight along with past-year use of healthy (eg, exercise), unhealthy (eg, fasting), and extreme (eg, use laxatives) weight-control behaviors. Descriptive statistics, generalized estimating equations, and generalized linear regression models accounting for school-level demographics. There was no observable pattern during the years 2008 to 2014 in the mean number of curricula topics addressing unhealthy weight-control behaviors, despite an increase in the prevalence of curricula addressing acceptance of body-size differences. Including three vs fewer weight-control topics and specifically including the topic of eating disorders in the curricula was related to a lower school-level percent of students using any extreme weight-control behaviors. In contrast, an overall measure of implementing school-based obesity-prevention policies/practices (eg, prohibited advertising) was unrelated to use of unhealthy or extreme behaviors. Results suggest obesity-prevention policies/practices do not have unintended consequences for student weight-control behaviors and support the importance of school-based health education as part of efforts to prevent unhealthy behaviors. Copyright © 2017 Academy of Nutrition and Dietetics. Published by Elsevier Inc. All rights reserved.

School-based obesity prevention policies and practices and weight-control behaviors among adolescents

PubMed Central

Davey, Cynthia S.; Caspi, Caitlin E.; Kubik, Martha Y.; Nanney, Marilyn S.

2016-01-01

Background The promotion of healthy eating and physical activity within school settings is an important component of population-based strategies to prevent obesity; however, adolescents may be vulnerable to weight-related messages as rapid development during this lifestage often leads to preoccupation with body size and shape. Objective This study (1) examines secular trends in secondary school curricula topics relevant to the prevention of unhealthy weight-control behaviors; (2) describes cross-sectional associations between weight-related curricula content and students’ use of weight-control behaviors; and (3) assesses whether implementation of school-based obesity prevention policies/practices are longitudinally related to students’ weight-control behaviors. Design/participants The Minnesota School Health Profiles and Minnesota Student Survey (grades 9 and 12) data were used along with National Center for Education Statistics data to examine secular trends; cross-sectional associations (n=141 schools); and longitudinal associations (n=42 schools). Main Outcome Measures Students self-reported their height and weight along with past-year use of healthy (e.g., exercise), unhealthy (e.g., fasting), and extreme (e.g., use laxatives) weight-control behaviors. Statistical analyses performed Descriptive statistics, generalized estimating equations, and generalized linear regression models accounting for school-level demographics. Results There was no observable pattern over the years 2008 to 2014 in the mean number of curricula topics addressing unhealthy weight-control behaviors despite an increase in the prevalence of curricula addressing acceptance of body size differences. Including three versus fewer weight-control topics and specifically including the topic of eating disorders in the curricula were related to a lower school-level percent of students using any extreme weight-control behaviors. In contrast, an overall measure of implementing school-based obesity prevention policies/practices (e.g., prohibited advertising) was unrelated to use of unhealthy or extreme behaviors. Conclusions Results suggest obesity prevention policies/practices do not have unintended consequences for student weight-control behaviors and support the importance of school-based health education as part of efforts to prevent unhealthy behaviors. PMID:27889315

Phylogenetic patterns and correlation of key structures for jumping: bone crests and cross-sectional areas of muscles in Leptodactylus (Anura, Leptodactylidae).

PubMed

Ponssa, María Laura; Fratani, Jéssica; Abdala, Virginia

2018-05-01

Anurans are characterized by their saltatory mode of locomotion, which is associated with a specific morphology. The coordinated action of the muscles and bones of the pelvic girdle is key to the transmission of the force of the hindlimbs to the axial skeleton during jumping. Two features are critical for optimal locomotory performance: the cross-sectional area of muscle and the bone crest attachment sites. The first character is a proxy of the force exerted by the muscle, whereas the crests are muscle attachments sites related to muscle force. The provisory relationship between these features has previously been identified and bone crest size can be used to infer the magnitude and, therefore, muscle force in fossils records. In this work, we explore the correlation between the cross-sectional area of essential muscles to the jumping mechanism (longissimus dorsi, extensor iliotibialis B, tenuissimus, puboischiofemoralis internus B, coccygeo-sacralis and coccygeo-iliacus) and the bone crests where these muscles are inserted (dorsal tubercle, dorsal crest and urostylar crest) in species of the genus Leptodactylus. This genus, along with other leptodactylids, exhibits a diversity of locomotor modes, including jumping, hopping, swimming and burrowing. We therefore analyzed the morphometric variation in the two features, cross-sectional area and bone crest area, expecting a correlation with different locomotor types. Our results showed: (i) a correlation between the urostylar crest and the cross-sectional area of the related muscles; (ii) that the bone crest surface area of urostyle and ilium and the cross-sectional area of the corresponding muscles can be utilized to infer locomotor faculties in leptodactylid frogs; and (iii) that the evolution of both characters demonstrates a general tendency from lower values in leptodactylid ancestors to higher values in the Leptodactylus genus. The results attest to the importance of the comparison of current ecological and phylogenetic analogues as they allow us to infer functionality and behavior in fossil and extant groups based on skeletal evidence. Phylogenetic patterns in character evolution and their correlation with locomotory types could imply that functional restrictions are also inherited in leptodactylid. © 2018 Anatomical Society.