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1

42 CFR 455.14 - Preliminary investigation.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Preliminary investigation. 455.14 Section 455.14 Public... Medicaid Agency Fraud Detection and Investigation Program § 455.14 Preliminary investigation. If the agency receives a...

2012-10-01

2

Preliminary Investigation of Profiling Tools and Methods.  

National Technical Information Service (NTIS)

The purpose of this technical memorandum is to outline the proposed component of project 15AG: Canadian Forces (CF) Enhanced Influence Operations and the preliminary investigation of profiling tools for CF application and purposes. There are several diffe...

A. Hawton C. Powlesland K. Richards Q. Lam W. Sullivan-Kwantes

2011-01-01

3

19 CFR 207.20 - Investigative activity following preliminary determination.  

Code of Federal Regulations, 2010 CFR

...2009-04-01 false Investigative activity following preliminary determination...207.20 Investigative activity following preliminary determination...shall continue investigative activities pending notice by the administering...Director shall circulate draft questionnaires for the final phase of...

2009-04-01

4

19 CFR 207.20 - Investigative activity following preliminary determination.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Investigative activity following preliminary determination...207.20 Investigative activity following preliminary determination...shall continue investigative activities pending notice by the administering...Director shall circulate draft questionnaires for the final phase of...

2010-04-01

5

Preliminary Investigation of Electrodeposited Asphalt Coatings.  

National Technical Information Service (NTIS)

A preliminary laboratory study was conducted to determine the feasibility of using electrodeposited asphalt coatings for controlling irrigation well casing corrosion. Black iron pipe sections (2 in. inside dia by 4 in. in length) corroded by nitric acid w...

W. R. Morrison

1966-01-01

6

A Preliminary Investigation of Corona Discharge Phenomena.  

National Technical Information Service (NTIS)

A preliminary study of corona breakdown between highly charged moving aerosols and grounded objects was conducted. The experimental facility was improved to the extent that the current carried by the aerosol, before and after a grounded needle, can be acc...

E. Barreto K. Martinot

1965-01-01

7

Ecological Investigations: Vegetation Studies, Preliminary Findings.  

National Technical Information Service (NTIS)

The objective of the vegetation studies conducted on the research site is to produce a descriptive data base that can be applied to determinations of carrying capacity of the site and surrounding area. Additional information obtained about parameters that...

E. R. Olgeirson R. B. Martin

1978-01-01

8

Preliminary Mycological Investigation of Endemic Nephropathy in Yugoslavia.  

National Technical Information Service (NTIS)

A preliminary mycological investigation of two areas of Yugoslavia in which endemic nephropathy occurs has shown that mold fungi occur abundantly in the domestic environments and follow their normal development in stored foodstuffs to provide a potential ...

J. L. Longbottom L. P. Smith P. Krog P. K. C. Austwick

1972-01-01

9

19 CFR 207.20 - Investigative activity following preliminary determination.  

Code of Federal Regulations, 2013 CFR

...FROM IMPORTS SOLD AT LESS THAN FAIR VALUE OR FROM SUBSIDIZED EXPORTS TO THE UNITED STATES Final Determinations, Short Life Cycle Products § 207.20 Investigative activity following preliminary determination. (a) If the...

2013-04-01

10

New methods in arthroscopy: preliminary investigations.  

PubMed Central

The microhysteroscope, which affords direct in vivo observation of otherwise inaccessible surfaces, can be used to great advantage in arthroscopy. Although conventional arthroscopy can distinguish between 'inflammatory' and 'reactive' (post-traumatic) synovial changes, the microendoscope offers the possibility of more precise differentiation. Synovial membranes, joint cartilage, and menisci were studied at four different magnifications, including microscopic observation of vitally stained cells. Frankly pathological synovia (e.g., rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis) were compared and distinguished from examples of less florid synovial changes. The fibrocartilaginous structure of the menisci and secondary undulations and tertiary depression of joint cartilage become visible in vivo with the microendoscope; these may well point to early damage to these structures. The authors believe that the three dimensional images at the magnifications provided by this microendoscope go some way towards bridging the gap between the conventional arthroscope, the light microscope, and the scanning electron microscope. This report presents preliminary findings with this new technique. Images

Frizziero, L; Zizzi, F; Leghissa, R; Ferruzzi, A

1986-01-01

11

The Language of Intoxication: Preliminary Investigations  

PubMed Central

Background The extensive vocabulary individuals use to describe alcohols subjective effects has largely gone unexamined in contemporary alcohol research. The present study examined the language drinkers use to describe their own intoxication. It is argued that this language can provide a more complete characterization of alcohols subjective effects than is available from existing objective and subjective measures of alcohol use and can inform future self-report research. Method Toward this goal, a preliminary, cross-sectional, web-based study of the familiarity and usage of current intoxication-related words was conducted in 2 different samples (n = 290 and 146, respectively) of university undergraduates. Results Exploratory factor analyses using data from the first sample and confirmatory factor analyses using data from the second sample similarly showed that commonly used terms loaded onto 2 factors, which directly reflected the number of drinks required to be considered moderately or heavily intoxicated, respectively. Gender differences were also found in the familiarity and self-use of some terms across both samples. Conclusions The findings suggest that alcohol researchers include multiple intoxication-related terms in future self-report research, and to periodically assess current intoxication-related vocabulary considering demographic, generational, and socio-cultural differences.

Levit, Ash; Sher, Kenneth J.; Bartholow, Bruce D.

2009-01-01

12

42 CFR 457.925 - Preliminary investigation.  

Code of Federal Regulations, 2012 CFR

...DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) STATE CHILDREN'S HEALTH INSURANCE PROGRAMS (SCHIPs) ALLOTMENTS AND GRANTS...investigation. If the State agency receives a complaint of fraud or abuse from any source or identifies questionable practices, the...

2012-10-01

13

Stress amongst district nurses: a preliminary investigation  

Microsoft Academic Search

Summary This paper presents the results of a pilot study investigating stress among district nurses in the north-west of England. Nurses completed questionnaires covering job satisfaction, mental health, stress, Type A behaviour, health behaviour, coping skills and demographic details. A specific measure of stress was developed following in-depth interviews with primary care professionals, including district nurses. A total

USHA USHA; RANI ROUT; M Sc

14

Experimental investigation of bearing capacity of highway loess foundations  

Microsoft Academic Search

In the representative area of loess in the northwestern part of China, three typical highway foundation projects were selected to conduct experimental investigations on the bearing capacity of the subgrade soil. The three highway projects were the Can-Liu highway project in Gansu province, the Da-Yun highway project in Shanxi province, and the Yan-Yu highway project in Shanxi province. Each selected

WANG JI-LI; LIU YI-LIN; LUAN MAO-TIAN; PENG SHENG-PING

15

Preliminary Heat Capacity and Vapor Pressure Measurements of 2D 4He on ZYX Graphite  

NASA Astrophysics Data System (ADS)

We report preliminary heat capacity and vapor pressure measurements of the first and second layers of 4He adsorbed on ZYX graphite. ZYX is known to have much better crystallinity than Grafoil, the most commonly-used exfoliated graphite substrate, such as a ten-times larger platelet size. This allows us to distinguish different phases in 2D 4He much more clearly and may provide qualitatively different insights into this system. We found a significantly asymmetric density-dependence of the heat-capacity peak associated with the sqrt{3}sqrt{3} phase formation comparing with that obtained with Grafoil. The 2nd-layer promotion density is determined as 11.80.3 nm-2 from the heat-capacity measurement of low density samples in the 2nd layer and vapor pressure measurement.

Nakamura, S.; Matsui, K.; Matsui, T.; Fukuyama, Hiroshi

2013-06-01

16

Collateral Information for Equating in Small Samples: A Preliminary Investigation  

ERIC Educational Resources Information Center

This article describes a preliminary investigation of an empirical Bayes (EB) procedure for using collateral information to improve equating of scores on test forms taken by small numbers of examinees. Resampling studies were done on two different forms of the same test. In each study, EB and non-EB versions of two equating methods--chained linear

Kim, Sooyeon; Livingston, Samuel A.; Lewis, Charles

2011-01-01

17

49 CFR 850.10 - Preliminary investigation by the Coast Guard.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Preliminary investigation by the Coast Guard. 850.10 Section...TRANSPORTATION SAFETY BOARD MARINE CASUALTY INVESTIGATIONS § 850.10 Preliminary investigation by the Coast Guard. (a) The...

2011-10-01

18

49 CFR 850.10 - Preliminary investigation by the Coast Guard.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Preliminary investigation by the Coast Guard. 850.10 Section...TRANSPORTATION SAFETY BOARD MARINE CASUALTY INVESTIGATIONS § 850.10 Preliminary investigation by the Coast Guard. (a) The...

2012-10-01

19

A preliminary investigation of ethical problems in publication and research.  

PubMed

This paper describes a preliminary study investigating the nature of publication and research ethics problems encountered by psychologists. Descriptions of 25 ethical dilemmas were written by 22 psychologists. Those dilemmas involved conflicts about authorship credit (13), plagiarism (9), unethical research (1), and other related problems (2). Stage of career did not determine the likelihood of their being confronted with an ethical dilemma. The most often cited causes of problems and sources of distress were unethical demands by more dominant individuals who were perceived to hold power over the respondents. PMID:15719502

Holaday, M; Yost, T E

1995-01-01

20

Building partnership capacity for the collaborative management of marine protected areas in the UK: A preliminary analysis  

Microsoft Academic Search

This paper reports the findings of a preliminary analysis of 15 case studies of inshore marine protected areas in the UK. It draws on the common-pool resource (CPR) literature and is premised on the thesis that building partnership capacity amongst relevant authorities and resource users provides a critical basis for overcoming collective action problems (CAPs), through the development of incentive

Peter J. S. Jones; Jacquelin Burgess

2005-01-01

21

Preliminary analysis to guide the choice of the power capacity of the future French Sodium Fast Reactor prototype  

Microsoft Academic Search

This paper presents a preliminary analysis aiming to guide the choice of the power capacity of the future French Sodium Fast Reactor (SFR) prototype. Given the French background on SFRs, the reactor prototype, called ASTRID (Advanced Sodium Technological Reactor for Industrial Demonstration), will be a demonstration reactor to validate at an industrial scale, the future commercial reactor technologies (1) mainly

G. Mignot; M. S. Chenaud; N. Devictor; L. Paret; G. Rodriguez; P. Dubuisson; J. Rouault

22

Preliminary Investigation of Economics Issues in Hospitalized Patients with Stroke  

PubMed Central

Background: The study of economics is important in Iranian stroke patients, because it is one of the costly diseases that could be linked to disability, mortality, and morbidity. The aim of this preliminary study was to investigate total treatment costs of hospitalized patients with stroke. Methods: A cross-sectional study of 24 patients conducted to Isfahan Neurosciences Research Centre was carried out between April 1, 2012 and September 31, 2012. Demographic (sex, age) and economic variables (Raise tariffs, accumulated surplus, the total amount, of patients, patients paid, and home insurance contribution) were extracted from the patients profiles. All information recorded and processed using Excel. Results: The mean age of patients was 71 years (ranged; 40-93 years old). Preliminary analysis of available costs issues could be described as: Raise tariffs (mean: 3500256 Rial, ranged: 504460-9775455 Rial), accumulated surplus (mean: 565578 Rial, ranged: 56700-2343664 Rial), the total amount (mean: 4045556 Rial, ranged: 715460-12219119 Rial), of patients (mean: 756037 Rial, ranged: 0-8365447 Rial), patients paid (mean: 1307762 Rial, ranged: 45300-9193000 Rial), and home insurance contribution (mean: 3070713 Rial, ranged 0-8887907 Rial). Conclusions: The cost disparity within this study after stroke could be mainly connected to variations in duration of hospital stay. Inspecting agenda towards this direction could reduce the economic cost of stroke significantly. Therefore, further assessment correlated to attain strategies in order to reduce costs associated to patients paid and home insurance contribution could be much more advantageous.

Tolou-Ghamari, Zahra; Shaygannejad, Vahid; Khorvash, Fariborz

2013-01-01

23

An Investigation about Antioxidant Capacity of Fruit Nectars  

Microsoft Academic Search

Nectars of some fruits, including orange, sour cherry, peach and apricot sold in Samsun markets were analyzed for total antioxidant capacity, total phenolic content, ascorbic acid content and total carotenoids (except sour cherry). Ferric reducing\\/antioxidant power (FRAP) assay was used to measure the total antioxidant power. Expressed as mol of antioxidant power\\/ml of nectars, average FRAP values were as 6.54

2003-01-01

24

Preliminary Investigation of the Dosimetric Properties of 'RadGel'  

NASA Astrophysics Data System (ADS)

A preliminary investigation into the efficacy of a new 3D dosimetry material, RadGelTM, for verification of radiation therapy dose distributions is presented. Small volumes of RadGelTM were found to exhibit a linear, reproducible response to dose. A gradual increase in optical-density (OD) with time was observed, suggesting scanning should be completed within 18 hours to keep a linear correlation of R2 > 0.99. A larger 10 cm diameter volume of RadGelTM was irradiated with a rotationally symmetric "spoke" plan designed to rigorously evaluate scanner/dosimeter combined performance. The dosimeter was imaged with the Duke Mid-sized Optical-CT Scanner (DMOS). Promising OD and corresponding dose maps were obtained. Edge artefacts were observed and are suspected to be exacerbated by the particular container used in this early study. Further studies will evaluate new containers and methods for refractive matching at the gel-container-fluid interface.

Newton, J. R.; Thomas, A.; Appleby, A.; Marsden, C.; Christman, E. A.; Wolodzko, J. G.; Oldham, M.

2010-11-01

25

In vivo depression of reserve albumin binding capacity by cadmium: a preliminary evaluation  

SciTech Connect

The effect of cadmium upon the depression of reserve albumin binding capacity (%RABC) was investigated in male, New Zealand white rabbits at daily dosages of 0.65 mg and 0.90 mg Cd/kg body weight. Correlations of % RABC to the duration of exposure were strongest at the higher dosage. After 30-35 days exposure, the decline in % RABC was partially reversed. Levels of total protein in urine increased sharply within a few days after the % RABC had been reduced by cadmium to their lowest values.

Roberts, C.A.; Clark, J.M.

1988-01-01

26

Preliminary investigation of CTH:YAG laser for cochlear implantation  

NASA Astrophysics Data System (ADS)

Cochlear implantation is a treatment for deafness that requires the surgical placement of electrodes within the cochlea, using a high-speed drill. While the drill is effective, the tip of the drill or the drill shaft may damage critical adjacent structures, such as the facial nerve. In addition, the narrow working spaces involved in this surgery make the drill a relatively cumbersome tool for such delicate work. The use of a flexible fiber to deliver the laser energy may make the surgery easier by allowing a more maneuverable instrument to access the region, while reducing the risk of injuring adjacent structures. We report our preliminary investigation of fiber delivery of CTH:YAG energy ((lambda) equals 2091 nm) for the purpose of bony ablation. A 550 micron diameter low-OH silica fiber was used to drill through up to 2.5 mm thick human temporal bone specimens. An average of 14 pulses was required for 1 mm thick bones, and an average of 33 pulses required to ablate 2 mm of bone. The holes drilled were precise, and showed limited adjacent tissue effect by gross and histopathologic evaluation. This work demonstrates the effective fiberoptic delivery of CTH:YAG energy for bone ablation. Further work is warranted to explore the clinical possibilities offered by this technique for precise bony ablation with limited adjacent tissue effect.

Shah, Udayan K.; Pawel, Bruce R.; Potsic, William P.

2000-05-01

27

Preliminary investigation of a novel controlled stiffness proximal femoral prosthesis.  

PubMed

Previous studies have suggested that a controlled stiffness prosthesis is required to address the conflicting requirements of minimizing stress shielding and micromotion. The design for a controlled stiffness prosthesis is proposed and a preliminary analytical investigation performed to assess its predicted performance before fabrication of a prototype component. The novel prosthesis consisted of a cobalt-chrome core and a flexible composite outer layer. Varying the composite layer thickness allowed the prosthesis stiffness to be controlled. Three variants of the controlled stiffness prosthesis were critically assessed using the finite element method and their predicted performance compared with those of conventional prosthesis designs. The potential for stress shielding was assessed by examining the periosteal strain energy and the potential for migration assessed by examining the endosteal minimum principal cancellous bone stresses. Both the conventional and controlled stiffness implants performed poorly as press-fit prostheses. All the press-fit prostheses generated high cancellous bone stresses, suggesting that excessive migration of these implants would be likely. The controlled stiffness implants performed better than the conventional implants when bonded to the surrounding bone. Although the controlled stiffness implants did not eliminate stress shielding of the calcar, they produced higher strain energies than the conventional designs. The findings of this study are that osseointegrated controlled stiffness implants may perform better than current osseointegrated cementless prostheses and therefore it is worth while progressing to the next stage, of prototyping an implant. PMID:9695635

Simes, J A; Taylor, M; Marques, A T; Jeronimidis, G

1998-01-01

28

46 CFR 4.40-10 - Preliminary investigation by the Coast Guard.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Preliminary investigation by the Coast Guard. 4...PUBLIC MARINE CASUALTIES AND INVESTIGATIONS Coast Guard-National Transportation...Safety Board Marine Casualty Investigations § 4.40-10...

2011-10-01

29

46 CFR 4.40-10 - Preliminary investigation by the Coast Guard.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Preliminary investigation by the Coast Guard. 4...PUBLIC MARINE CASUALTIES AND INVESTIGATIONS Coast Guard-National Transportation...Safety Board Marine Casualty Investigations § 4.40-10...

2012-10-01

30

Preliminary investigation on the natural durability of guayule ...  

Treesearch

Section 5, Environmental Aspects : 31st annual meeting, Kona, Hawaii, USA, 14- 19 ... The objective of this preliminary study was to determine the effects of the ... the residue or whole plant and plastic binder, which was used to improve the...

31

Investigation of Heat capacity and Specific Heat: Using Different Temperatures of Water and Solids  

NSDL National Science Digital Library

This activity is a chemistry lab-based investigation where students apply observational skills and critical thinking skills to finding specific heat and heat capacity using different temperatures of water and solids. A final activity will assess students understanding of specific heat and heat capacity and promote data analysis skills, using real-life situations.

32

43 CFR 3271.12 - What do I need to start preliminary site investigations that may disturb the surface?  

Code of Federal Regulations, 2012 CFR

...preliminary site investigations that may disturb...Continued) BUREAU OF LAND MANAGEMENT...preliminary site investigations that may disturb...the requirements of either § 3251...begin the site investigation or surface...

2012-10-01

33

Public relations ethics and communitarianism : A preliminary investigation  

Microsoft Academic Search

This study presents a preliminary examination of communitarianism and its emphasis on community and responsibility as an ethical base for public relations. It suggests that the emphasis business currently places on quality, social responsibility and stewardship may fit within a communitarian approach.Because public relations seeks to establish a sense of community, a communitarian base to public relations ethics may enable

Kathie A. Leeper

1996-01-01

34

A Preliminary Investigation of Bird Classification by Doppler Radar.  

National Technical Information Service (NTIS)

A preliminary study of the application of Doppler radar to the classification of birds is reported. The desirability for improvements in bird classification stems primarily from the hazards they present to jet aircraft in flight and in the vicinity of air...

L. W. Martinson

1973-01-01

35

PRELIMINARY Investigation of the Counter-Flow Jet Flap.  

National Technical Information Service (NTIS)

Preliminary experimental studies were conducted to provide design information for a three-dimensional wing model containing a counter-flow jet flap. This high-lift device uses a forward-facing ejector to induce airflow into a blunt, opened trailing edge. ...

M. R. Fink R. C. Stoeffler

1970-01-01

36

Preliminary Investigation of a Video-Based Stimulus Preference Assessment  

ERIC Educational Resources Information Center

|Video clips may be an effective format for presenting complex stimuli in preference assessments. In this preliminary study, we evaluated the correspondence between preference hierarchies generated from preference assessments that included either toys or videos of the toys. The top-ranked item corresponded in both assessments for 5 of the 6

Snyder, Katie; Higbee, Thomas S.; Dayton, Elizabeth

2012-01-01

37

PREDICTING THE ENTREPRENEURIAL INTENTIONS OF NONBUSINESS MAJORS: A PRELIMINARY INVESTIGATION  

Microsoft Academic Search

This paper reports preliminary results of an ongoing project to profile entrepreneurial intentions of Family and Consumer Sciences (FCS) majors. The study used a self-administered questionnaire to explore the influence of vicarious experience, entrepreneurial orientation, image of entrepreneurship, and subjective norms on EI in a non business student sample. Students who expressed stronger interest in entrepreneurial careers are proactive, creative,

Barbara J. Frazier; Linda S. Niehm

38

Examining the Reinforcing Properties of Making Sense: A Preliminary Investigation  

ERIC Educational Resources Information Center

|Acceptance and commitment therapy asserts that in clinical problems such as rumination and depression, making sense continues despite accompanying aversive consequences, because sense-making is reinforcing, particularly when it leads to experiential avoidance. The following series of experiments aimed to provide preliminary empirical evidence for

Wray, Alisha M.; Dougher, Michael J.; Hamilton, Derek A.; Guinther, Paul M.

2012-01-01

39

Regional Patterns of Exurban Industrialization: Results of a Preliminary Investigation  

Microsoft Academic Search

This article reports preliminary results of current research into the changing spatial pattern of manufacturing in the contiguous states. Complete results are not due for two years. Results reported here are general in nature but portray trends important to those involved in economic development, especially activities aimed at attracting manufacturing firms. Between 1965 and 1985 total employment in the contiguous

Arthur C. Nelson

1990-01-01

40

Midlife Transition and Women's Spirituality Groups: A Preliminary Investigation  

ERIC Educational Resources Information Center

|The purpose of this preliminary study was to describe midlife transition, spirituality, and healing of relationships for members of women's spirituality groups. Ten women completed the Spiritual Well-Being Scale (R. Paloutzian & C. Ellison, 1982) and a 45-minute interview about spirituality, religion, life transitions, relationships, and

Geertsma, Elisabeth J.; Cummings, Anne L.

2004-01-01

41

Preliminary Investigation of a Video-Based Stimulus Preference Assessment  

ERIC Educational Resources Information Center

Video clips may be an effective format for presenting complex stimuli in preference assessments. In this preliminary study, we evaluated the correspondence between preference hierarchies generated from preference assessments that included either toys or videos of the toys. The top-ranked item corresponded in both assessments for 5 of the 6

Snyder, Katie; Higbee, Thomas S.; Dayton, Elizabeth

2012-01-01

42

Islam, media, and cultural policy: a preliminary investigation  

Microsoft Academic Search

This article seeks to expand the purview of cultural policy studies of the Middle East by offering some preliminary observations on implicit Islamic cultural policies in Egypt since the 1990s. It argues that there has been an ascending moment of industrial, market?oriented media culture and practice in Egypt during the past two decades, which has been shaped by a new

Karim Tartoussieh

2009-01-01

43

DEVELOPMENT OF A DATABASE FOR TOTAL ANTIOXIDANT CAPACITY IN FOODS: A PRELIMINARY STUDY  

Technology Transfer Automated Retrieval System (TEKTRAN)

For the first time a database of the antioxidant capacities of both the lipophilic and hydrophilic components of food samples has been developed using the Oxygen Radical Absorbance Capacity (ORACFL) Assay and a peroxyl radical generator. For lipophilic components, randomly methylated -cyclodextrin ...

44

Improving CAD performance in pulmonary embolism detection: preliminary investigation  

NASA Astrophysics Data System (ADS)

In this preliminary study, a new computer-aided detection (CAD) scheme for pulmonary embolism (PE) detection was developed and tested. The scheme applies multiple steps including lung segmentation, candidate extraction using intensity mask and tobogganing method, feature extraction, false positive reduction using a multifeature based artificial neural network (ANN) and a k-nearest neighbor (KNN) classifier to detect and classify suspicious PE lesions. In particular, a new method to define the surrounding background regions of interest (ROI) depicting PE candidates was proposed and tested in an attempt to reduce the detection of false positive regions. In this study, the authors also investigated following methods to improve CAD performance, which include a grouping and scoring method, feature selection using genetic algorithm, and limitation on allowed suspicious lesions to be cued in one examination. To test the scheme performance, a set of 20 chest CT examinations were selected. Among them, 18 are positive cases depicted 44 verified PE lesions and the remaining 2 were negative cases. The dataset was also divided into a training subset (9 examinations) and a testing subset (11 examinations), respectively. The experimental results showed when applying to the testing dataset CAD scheme using tobogganing method alone achieved 2D region-based sensitivity of 72.1% (220/305) and 3D lesion-based sensitivity of 83.3% (20/24) with total 19,653 2D false-positive (FP) PE regions (1,786.6 per case or approximately 6.3 per CT slice). Applying the proposed new method to improve lung region segmentation and better define the surrounding background ROI, the scheme reduced the region-based sensitivity by 6.5% to 65.6% or lesion-based sensitivity by 4.1% to 79.2% while reducing the FP rate by 65.6% to 6,752 regions (or 613.8 per case). After applying the methods of grouping, the maximum scoring, a genetic algorithm (GA) to delete "redundant" features, and limiting the maximum number of cued-lesions in one examination, CAD scheme further reduced FP rate to 50 per case. Based on the FROC curve, an operating threshold was set up in which the CAD scheme could ultimately achieve 63.2% detection sensitivity with 18.4 FP regions per case when applying to the testing dataset. This study investigated the feasibility of several methods applying to the CAD scheme in detecting PE lesions and demonstrated that CAD performance could depend on many factors including better defining candidate ROI and its background, optimizing the 2D region grouping and scoring methods, selecting the optimal feature set, and limiting the number of allowed cueing lesions per examination.

Park, Sang Cheol; Chapman, Brian; Deible, Christopher; Lee, Sean; Zheng, Bin

2010-03-01

45

Properties of Distillers Grains Composites: A Preliminary Investigation  

Microsoft Academic Search

Interest in renewable biofuel sources has intensified in recent years, leading to greatly increased production of ethanol\\u000a and its primary coproduct, Distillers Dried Grain with Solubles (DDGS). Consequently, the development of new outlets for DDGS\\u000a has become crucial to maintaining the economic viability of the industry. In light of these developments, this preliminary\\u000a study aimed to determine the suitability of

Vanessa Cheesbrough; Kurt A. Rosentrater; Jerry Visser

2008-01-01

46

Preliminary investigation for a cylindrical magnetic storage system  

Microsoft Academic Search

A cylindrical magnetic storage system was built and preliminary measurements were made. The system is expected to overcome the writing problems at high areal densities caused by write head skew angle and is aimed at the realization of 1 Tb\\/in2 2 Gb\\/s perpendicular magnetic recording. Cylindrical substrates, sputtering equipment, and a read\\/write tester for a cylindrical magnetic storage were fabricated.

Hiroshi Yamada; Takehito Shimatsu; Isao Watanabe; Hiroaki Muraoka; Yoshihisa Nakamura

2003-01-01

47

Preliminary investigation of a video-based stimulus preference assessment.  

PubMed

Video clips may be an effective format for presenting complex stimuli in preference assessments. In this preliminary study, we evaluated the correspondence between preference hierarchies generated from preference assessments that included either toys or videos of the toys. The top-ranked item corresponded in both assessments for 5 of the 6 participants, and the top- and bottom-ranked items corresponded for 4 participants. The implications of these results for future research on video preference assessments are discussed. PMID:22844148

Snyder, Katie; Higbee, Thomas S; Dayton, Elizabeth

2012-01-01

48

Fathers of Persons with Mental Illness: A Preliminary Study of Coping Capacity and Service Needs  

Microsoft Academic Search

Issues faced by fathers coping with the mental illness of an adult child represent an unexplored dimension of service needs. A preliminary exploratory study found that a group of 25 such fathers manifested important indicators of emotional stress that were largely unrecognized and unacknowledged. They also demonstrated typical patterns of healing that were different from those experienced by their wives.

Richard T. Wintersteen; Kathryn L. Rasmussen

1997-01-01

49

POREC: Preliminary Investigations Into the Slot Gap Model  

NASA Astrophysics Data System (ADS)

Optical observations of pulsars, uniquely for the high energy regime, can determine all Stokes' parameters and thus fully characterize the photon flux detectable at the Earth. As polarization can give a insight into the geometry of emission zone we can use the measured Stokes parameters to determine through an inverse mapping process the location within the magnetosphere where the optical emission is likely to occur. In this paper we present some preliminary results namely the emission is mainly from 300 km above the neutron star surface.

de Brca, D.; McDonald, J.; O'Connor, P.; Shearer, A.

2012-12-01

50

Everyday episodic memory in amnestic mild cognitive impairment: a preliminary investigation  

PubMed Central

Background Decline in episodic memory is one of the hallmark features of Alzheimer's disease (AD) and is also a defining feature of amnestic Mild Cognitive Impairment (MCI), which is posited as a potential prodrome of AD. While deficits in episodic memory are well documented in MCI, the nature of this impairment remains relatively under-researched, particularly for those domains with direct relevance and meaning for the patient's daily life. In order to fully explore the impact of disruption to the episodic memory system on everyday memory in MCI, we examined participants' episodic memory capacity using a battery of experimental tasks with real-world relevance. We investigated episodic acquisition and delayed recall (story-memory), associative memory (face-name pairings), spatial memory (route learning and recall), and memory for everyday mundane events in 16 amnestic MCI and 18 control participants. Furthermore, we followed MCI participants longitudinally to gain preliminary evidence regarding the possible predictive efficacy of these real-world episodic memory tasks for subsequent conversion to AD. Results The most discriminating tests at baseline were measures of acquisition, delayed recall, and associative memory, followed by everyday memory, and spatial memory tasks, with MCI patients scoring significantly lower than controls. At follow-up (mean time elapsed: 22.4 months), 6 MCI cases had progressed to clinically probable AD. Exploratory logistic regression analyses revealed that delayed associative memory performance at baseline was a potential predictor of subsequent conversion to AD. Conclusions As a preliminary study, our findings suggest that simple associative memory paradigms with real-world relevance represent an important line of enquiry in future longitudinal studies charting MCI progression over time.

2011-01-01

51

Preliminary geothermal investigations at Manley Hot Springs, Alaska  

SciTech Connect

Manley Hot Springs is one of several hot springs which form a belt extending from the Seward Peninsula to east-central Alaska. All of the hot springs are low-temperature, water-dominated geothermal systems, having formed as the result of circulation of meteoric water along deepseated fractures near or within granitic intrusives. Shallow, thermally disturbed ground at Manley Hot Springs constitutes an area of 1.2 km by 0.6 km along the lower slopes of Bean Ridge on the north side of the Tanana Valley. This area includes 32 springs and seeps and one warm (29.1/sup 0/C) well. The hottest springs range in temperature from 61/sup 0/ to 47/sup 0/C and are presently utilized for space heating and irrigation. This study was designed to characterize the geothermal system present at Manley Hot Springs and delineate likely sites for geothermal drilling. Several surveys were conducted over a grid system which included shallow ground temperature, helium soil gas, mercury soil and resistivity surveys. In addition, a reconnaissance ground temperature survey and water chemistry sampling program was undertaken. The preliminary results, including some preliminary water chemistry, show that shallow hydrothermal activity can be delineated by many of the surveys. Three localities are targeted as likely geothermal well sites, and a model is proposed for the geothermal system at Manley Hot Springs.

East, J.

1982-04-01

52

Preliminary estimates of electrical generating capacity of slim holes--a theoretical approach  

SciTech Connect

The feasibility of using small geothermal generators (< 1 MWe) for off-grid electrical power in remote areas or for rural electrification in developing nations would be enhanced if drilling costs could be reduced. This paper examines the electrical generating capacity of fluids which can be produced from typical slim holes (six-inch diameter or less), both by binary techniques (with downhole pumps) and, for hotter reservoir fluids, by conventional spontaneous-discharge flash-steam methods. Depending mainly on reservoir temperature, electrical capacities from a few hundred kilowatts to over one megawatt per slim hole appear to be possible.

Pritchett, John W.

1995-01-26

53

Preliminary Findings of the LDEF Materials Special Investigation Group (Abstract Only).  

National Technical Information Service (NTIS)

Presented here are the charter and scope of the Long Duration Exposure Facility's (LDEF) Space Environmental Effects on Materials Special Investigation Group (MSIG) activities, and an overview of of preliminary observations. These observations of low-Eart...

B. A. Stein H. G. Pippin

1991-01-01

54

Preliminary Investigation of Sulfur Loading in Hanford LAW Glass  

SciTech Connect

A preliminary estimate was developed for loading limits for high-sulfur low-activity waste (LAW) feeds that will be vitrified into borosilicate glass at the Hanford Site in the waste-cleanup effort. Previous studies reported in the literature were consulted to provide a basis for the estimate. The examination of previous studies led to questions about sulfur loading in Hanford LAW glass, and scoping tests were performed to help answer these questions. These results of these tests indicated that a formulation approach developed by Vienna and colleagues shows promise for maximizing LAW loading in glass. However, there is a clear need for follow-on work. The potential for significantly lowering the amount of LAW glass produced at Hanford (after the initial phase of processing) because of higher sulfur tolerances may outweigh the cost and effort required to perform the necessary testing.

Vienna, John D.; Hrma, Pavel R.; Buchmiller, William C.; Ricklefs, Joel S.

2004-04-01

55

Mixing of Salinity-Stratified Water by Pneumatic Barriers. Report 1. Preliminary Investigations. Hydraulic Model Investigation.  

National Technical Information Service (NTIS)

Preliminary tests were conducted at the U. S. Army Engineer Waterways Experiment Station to identify the process involved in mixing salinity-stratified bodies of water by means of a pneumatic (bubble) screen. Salinity, velocity, and photographic data from...

W. H. McAnally

1973-01-01

56

An Algebraic, Analytic, and Algorithmic Investigation on the Capacity and Capacity-Achieving Input Probability Distributions of Finite-Input- Finite-Output Discrete Memoryless Channels  

Microsoft Academic Search

In this paper, we investigate the capacity and capacity-achieving input probability distributions (IPDs) of finite-input-finite-output discrete memoryless channels (DMCs). In the general respect, we establish a novel and simple characterization for the capacity-achieving IPDs of a DMC, which is equivalent to the conventional Kuhn-Tucker conditions. We then prove a conjecture of Majani and Rumsey, which claims that every probability component

Xue-bin Liang

2008-01-01

57

Functional capacity of patients in the early period after the embolization of cerebrovascular malformations: preliminary findings.  

PubMed

Research into outcomes of endovascular intervention for cerebral blood vessel malformations has previously focused on the clinical picture of the disease, death rate, comparison of surgical methods, and the most common postoperative and postbleeding complications. From the nursing standpoint, the crucial elements in assessing postoperative patients are functional outcome defining patients' ability to function in life and recognition of impairments in which patients will be dependent on the nursing staff. The aim of the study was to assess functional capacity of patients before and after the embolization of cerebral blood vessel malformations in the aspect of nursing care. The study included 38 patients after embolization of cerebral blood vessels. The assessment of their condition using the Functional Capacity Scale was performed twice: before and after the surgical procedure. The research shows that on the day of admission to hospital, patients had greatest difficulty performing hygienic activities (p < .0001), satisfying physiological needs (p < .0001), and consuming their meals (p < .004). Headache (p < .002) and poor psychological state (p < .0001) manifesting itself through mild depression constituted other serious problems. After the surgery, vast majority of patients were independent in terms of self-care (p ? .03). Headache occurred in the case of 21% of patients, and psychological state improved in 34% of patients, which shows that there is a major demand for care in this sphere. PMID:22955239

Slusarz, Robert; Biercewicz, Monika; Rybicka, Roksana; Beuth, Wojciech; Sniegocki, Maciej

2012-10-01

58

Preliminary estimation of the reservoir capacity and the longevity of the Baca Geothermal Field, New Mexico  

SciTech Connect

A 50 MW geothermal power plant is currently under development at the Baca site in the Valles Caldera, New Mexico, as a joint venture of the Department of Energy (DOE), Union Oil Company of California, and the Public Service Company of New Mexico (PNM). To date, over 20 wells have been drilled on the prospect, and the data from these wells indicate the presence of a high-temperature liquid dominated reservoir. Data from open literature on the field are used to estimate the amount of hot water in place (reservoir capacity) and the length of time the reservoir can supply steam for a 50 MW power plant (reservoir longevity). The reservoir capacity is estimated by volumetric calculations using existing geological, geophysical, and well data. The criteria used are described and the sensitivity of the results discussed. The longevity of the field is studied using a two-phase numerical simulator (SHAFT79). A number of cases are studied based upon different boundary conditions, and injection and production criteria. Constant or variable mass production is employed in the simulations with closed, semi-infinite or infinite reservoir boundaries. In one of the cases, a fault zone feeding the production region is modeled. The injection strategy depends on the available waste water. The results of these simulations are discussed and the sensitivity of the results, with respect to mesh size and the relative permeability curves used, are briefly studied.

Bodvarsson, G.S.; Vonder Haar, S.; Wilt, M.; Tsang, C.F.

1980-07-01

59

A Preliminary Investigation of the Reactivity of Amorphous Red Phosphorus.  

National Technical Information Service (NTIS)

The reactivity of amorphous red phosphorus specimens obtained from six commercial manufacturers was investigated by a non-isothermal reaction with a sulfuryl chloride-benzene medium. Variations in the reactivity of the phosphorus specimens were measured. ...

W. Ripley C. A. Lipscomb

1968-01-01

60

Preliminary Investigations of Risk Sharing in Construction Contracts.  

National Technical Information Service (NTIS)

This report presents the results of an investigation to delineate the current assignments of risk between the owner and the contractor in typical Corps of Engineers firm-fixed-price construction contracts. A working definition of risk is formulated. Resea...

C. A. Erikson M. J. O'Connor O. E. Rood

1978-01-01

61

Dual-task practice enhances motor learning: a preliminary investigation.  

PubMed

Practicing a motor task under dual-task conditions can be beneficial to motor learning when the secondary task is difficult (Roche et al. in Percept Psychophys 69(4):513-522, 2007) or when it engages similar processes as the primary motor task (Hemond et al. in J Neurosci 30(2):650-654, 2010). The purpose of this pilot study was to determine which factor, difficulty level or engaged processes, of a secondary task is more critical in determining dual-task benefit. Participants practiced a discrete arm task in conjunction with an audio-vocal reaction time (RT) task. We presented two different RT tasks that differed in difficulty, simple versus choice (i.e., more difficult), at two different arm task phases that differed in engaged processes, preparation versus execution, resulting in four dual-task conditions. A simple RT task is thought to predominantly engage motor execution processes, therefore would engage similar processes as the arm movement task when it is presented during the execution phase, while a choice RT task is thought to engage planning processes and therefore would engage similar processes too when it is presented during the preparation phase. Enhanced motor learning was found in those who engaged similar process as the primary task during dual-tasking (i.e., choice RT presented during preparation and simple RT presented during execution). Moreover, those who showed enhanced learning also demonstrated high dual-task cost (poor RT task performance) during practice, indicating that both tasks were taxing the same resource pool possibly due to engaging similar cognitive processes. To further test the relation between dual-task cost and enhanced learning, we delayed the presentation timing of the choice RT task during the preparation phase and the simple RT task during the execution phase in two control experiments. Dual-task cost was reduced in these delayed timing conditions, and the enhanced learning effect was attenuated. Together, our preliminary findings suggest that it is the similarity hypothesis and not the difficulty hypothesis that mediates the enhanced motor learning under dual-task conditions. PMID:22886044

Goh, Hui-Ting; Sullivan, Katherine J; Gordon, James; Wulf, Gabriele; Winstein, Carolee J

2012-08-12

62

Antioxidant capacity in rat brain after intracerebroventricular treatment with streptozotocin and alloxan--a preliminary study.  

PubMed

Intracerebroventricular (icv) administration of betacytotoxic drug streptozotocin (STZ) produces long-term and progressive cognitive deficits in rats, as well as deficits in cerebral glucose and energy metabolism. These changes resemble those found in the brain of patients with sporadic Alzheimer's disease (sAD), and therefore, STZ-icv treated rats have been proposed as an experimental model of sAD. In this study the antioxidant capacity (AC), using manual oxygen radical absorbance capacity (ORAC) assay, was measured in the rat brain frontoparietal cortex (FC) and brainstem-cerebellum region (BS-CB) after administration of STZ and another betacytotoxic drug alloxan (AL). Region-specific differences of AC were found, which were more expressed when hydroxyl radical (ORAC(-OHo)) generator was used in the assay. AC against ORAC(-OHo) was significantly lower in BS-CB than in FC of the control rats. Furthermore, ORAC(-OHo) significantly decreased in BS-CB 3-months following the icv administration of AL, but significantly increased following the TG+AL combined treatment in comparison with the controls. However, 3-months following the icv treatment of AL combination with a different glucose transport inhbitor, 3-O-methyl-D-glucose, ORAC(-OHo) values in BS-CB and ORAC(-ROOo) values in FC were significantly decreased in comparison to the controls. Our results suggest that betacytotoxic-icv treatment alters antioxidant defense systems in the brain, which particularly regarding the STZ-icv treatment, could be a useful tool in search for possible new antioxidant treatments of the neurodegenerative disorders such as sAD. PMID:18515212

Sapcanin, A; Sofic, E; Tahirovic, I; Salkovic-Petrisic, M; Hoyer, S; Riederer, P

2008-04-01

63

Gambling Behaviors Among Oxford House Residents: A Preliminary Investigation.  

PubMed

The present study investigated the prevalence of gambling behaviors among 71 individuals recovering from substance-dependent disorders and living in self-run recovery homes (Oxford Houses). Residents were given the South Oaks Gambling Screen to assess gambling behaviors and pathological gambling, and 19.7% of the sample was identified as having probable pathological gambling. These residents reported proportionately more involvement in a variety of gambling behaviors than other residents. Engagement in various gambling activities was consistent with previous investigations and suggested that self-run recovery homes such as Oxford Houses might be suitable referral sources for recovering persons who have comorbid gambling problems. PMID:21949457

Majer, John M; Angulo, Robert S; Aase, Darrin M; Jason, Leonard A

2011-07-01

64

Preliminary Investigation of Ego Stage and Leadership Effectiveness.  

National Technical Information Service (NTIS)

The purpose of this thesis was to investigate a possible relationship between a leader's stage of ego development and his/her effectiveness as a leader. Results, using a small sample of Naval officers and enlisted personnel attached to Naval Communication...

J. H. Garner

1988-01-01

65

A Preliminary Investigation of Asthma Mortality in Schools  

ERIC Educational Resources Information Center

Although asthma deaths in children are rare, most asthma deaths should be preventable. No information has been identified in the professional literature addressing the occurrence of asthma deaths in schools. This investigation identified asthma deaths that occurred in US schools between 1990 and 2003 and the circumstances surrounding those deaths.

Greiling, Andrea K.; Boss, Leslie P.; Wheeler, Lani S.

2005-01-01

66

Preliminary investigation of the characteristics of an oscillating windpowered generator  

Microsoft Academic Search

The requirements for active turbulence generating systems are discussed and measurements with an oscillating vane generator are described. The excitation of lateral velocity fluctuations was investigated. The oscillating vane concept allows these fluctuations to be adjusted within a limited domain directly by the incident angle variations of the generator blades. This enables a turbulence structure in the frequency, amplitude, and

P. E. J. Vermeulen

1981-01-01

67

A Preliminary Investigation of Asthma Mortality in Schools  

ERIC Educational Resources Information Center

|Although asthma deaths in children are rare, most asthma deaths should be preventable. No information has been identified in the professional literature addressing the occurrence of asthma deaths in schools. This investigation identified asthma deaths that occurred in US schools between 1990 and 2003 and the circumstances surrounding those

Greiling, Andrea K.; Boss, Leslie P.; Wheeler, Lani S.

2005-01-01

68

A Preliminary Investigation of Factors Associated with Job Loss Grief  

ERIC Educational Resources Information Center

This study investigated relationships among factors hypothesized as related to job loss grief. A summary grief score correlated positively with time since job loss and number of dependents, and negatively with length of notice. Perceived reemployment prospects and income loss related positively to some grief index subscales, as did the condition

Brewington, Janice O.; Nassar-McMillan, Sylvia C.; Flowers, Claudia P.; Furr, Susan R.

2004-01-01

69

Preliminary investigation on concentrating of acetol from wood vinegar  

Microsoft Academic Search

Acetol, as one of the components in biomass pyrolysis liquid, is a high value added compound for medicine synthesis. Benefit may be obtained if acetol can be extracted from the pyrolysis liquid, while the instability of acetol makes the concentrating difficult. In this paper, the concentrating of acetol from wood vinegar is preliminarily investigated, and the conditions of distillation, solvent

Ze Wang; Weigang Lin; Wenli Song; Jianzhong Yao

2010-01-01

70

A preliminary investigation of chlorine XANES in silicate glasses  

Microsoft Academic Search

Chlorine speciation in silicate melts affects volatile exsolution, rheology, and thermodynamic properties of the melt but is poorly known. X-Ray Absorption Near Edge Structure (XANES) spectra have been used to investigate Cl speciation in 26 silicate glasses and to test the hypothesis that Cl in silicate melts is hosted by species that combine Cl and network-modifying cations such as Ca

K. A. Evans; J. A. Mavrogenes; H. S. O'Neill; N. S. Keller; L.-Y. Jang

2008-01-01

71

Intonation Abilities of Children with Williams Syndrome: A Preliminary Investigation  

ERIC Educational Resources Information Center

|Purpose: The authors investigated expressive and receptive intonation abilities in children with Williams syndrome (WS) and the relation of these abilities to other linguistic abilities. Method: Fourteen children with WS, 14 typically developing children matched to the WS group for receptive language (LA), and 15 typically developing children

Stojanovik, Vesna; Setter, Jane; van Ewijk, Lizet

2007-01-01

72

Spirituality and Young Women in Transition: A Preliminary Investigation  

ERIC Educational Resources Information Center

|This study contributes to the growing body of knowledge about spirituality and life transitions. Through qualitative investigation, 9 young women in professional education programs described their definition of spirituality, their spiritual activities, and how they used their spirituality to cope with life transitions as they prepared to enter

Livingston, Kimberly A.; Cummings, Anne L.

2009-01-01

73

Map Interpretation Instruction in Introductory Textbooks: A Preliminary Investigation  

ERIC Educational Resources Information Center

|Maps are often understood as the primary tool in geography; however, recent research indicates that the number of students taking map interpretation courses has declined. As geography students are expected to master the uses of maps, this study investigates the materials available in introductory collegiate textbooks that promote the development

Gillen, Jamie; Skryzhevska, Liza; Henry, Mary C.; Green, Jerry

2010-01-01

74

A Preliminary Investigation into the Hydroelastic Behaviour of a Non-Rigidly Mounted Hydrofoil  

Microsoft Academic Search

A preliminary investigation into the behaviour of a non-rigidly mounted hydrofoil is described. The foil was excited by boundary layer turbulence and trailing edge vortex shedding. The investigation involved the development and commissioning of specialised equipment to mount a hydrofoil in the Australian Maritime College Cavitation tunnel to enable parameters such as the stiffness and clearances about the 1st torsion

D. Clarke; B. Anderson; P. Brandner; B. Kidd; S. Kanev

75

Gambling Behaviors Among Oxford House Residents: A Preliminary Investigation  

Microsoft Academic Search

The present study investigated the prevalence of gambling behaviors among 71 individuals recovering from substance-dependent disorders and living in self-run recovery homes (Oxford Houses). Residents were given the South Oaks Gambling Screen to assess gambling behaviors and pathological gambling, and 19.7% of the sample was identified as having probable pathological gambling. These residents reported proportionately more involvement in a variety

John M. Majer; Robert S. Angulo; Darrin M. Aase; Leonard A. Jason

2011-01-01

76

Preliminary results using computerized telediaphanography for investigating breast disease.  

PubMed

An instrument (telediaphanograph) for examination of the female breast has been developed which is optically based and carries no risk to the patient. Malignant lesions, which are strongly light absorbing, can be visualized by dark shadows cast on the superior aspect of the breast. The discriminating ability of telediaphanography for carcinoma has been investigated in relation to 129 patients with suspected breast disease. The sensitivity was found to be 0.94 and the specificity 0.89. PMID:3814887

Bundred, N; Levack, P; Watmough, D J; Watmough, J A

1987-01-01

77

MALDI analysis of adhesive constituents: a preliminary investigation  

Microsoft Academic Search

Oligomer distributions in epoxides and toughening agents typical of those used in adhesives have been investigated using matrix assisted laser desorption\\/ionization (MALDI) time-of-flight mass spectrometry. In the case of a typical epoxide, the technique showed the presence of a number of oligomers that have not been detected by any other means. Mean molecular weight was also higher than that found

P. Humphrey

1995-01-01

78

Role of Working Memory in Children's Understanding Spoken Narrative: A Preliminary Investigation  

ERIC Educational Resources Information Center

|The role of phonological short-term memory (PSTM), attentional resource capacity/allocation, and processing speed on children's spoken narrative comprehension was investigated. Sixty-seven children (6-11 years) completed a digit span task (PSTM), concurrent verbal processing and storage (CPS) task (resource capacity/allocation), auditory-visual

Montgomery, James W.; Polunenko, Anzhela; Marinellie, Sally A.

2009-01-01

79

A preliminary investigation on the distribution of cannabinoids in man.  

PubMed

An LC/MS/MS procedure to determine THC along with its major metabolites 11-OH-THC, THC-COOH and its glucuronide as well as the cannabinoids CBD and CBN was applied to 5 post mortem cases to study their distribution into some less commonly studied matrices. Analytes were determined in fluids and tissue homogenates following protein precipitation and liquid-liquid extraction. Gall bladder fluid exhibited maximum concentrations of all analytes except THC, which was detectable in high concentrations in muscle tissue along with CBD. THC was also present in lung specimens, whereas its concentration in liver samples was low or not detectable at all. Liver und kidney specimens contained appreciable amounts of THC-COOglu. Findings from bile support extensive enterohepatic recirculation of the glucuronide. Muscle tissue seems an interesting specimen to detect multiple cannabis use, and brain may serve as an alternative specimen for blood; nevertheless, the present findings should be substantiated by further investigations. PMID:21570784

Gronewold, Antonia; Skopp, Gisela

2011-05-13

80

Age Dating of Mixed SNM--Preliminary Investigations  

SciTech Connect

Recently we investigated the nuclear forensics problem of age determination for mixed special nuclear material (SNM). Through limited computational mixing experiments and interactive age analysis, it was observed that age dating results are generally affected by the mixing of samples with different assays or even by small radioactive material contamination. The mixing and contamination can be detected through interactive age analysis, a function provided by the Decay Interaction, Visualization and Analysis (DIVA) software developed by NSTec. It is observed that for mixed SNM with two components, the age estimators typically fall into two distinct clusters on the time axis. This suggests that averaging or other simple statistical methods may not always be suitable for age dating SNM mixtures. Instead, an interactive age analysis would be more suitable for age determination of material components of such SNM mixtures. This work was supported by the National Center for Nuclear Security (NCNS).

Yuan, D., Guss, P. P., Yfantis, E., Klingensmith, A., Emer, D.

2011-12-01

81

Traditional East asian medical pulse diagnosis: a preliminary physiologic investigation.  

PubMed

Abstract Background: Toyohari Meridian Therapy (TMT) is a Japanese system of acupuncture that utilizes radial pulse diagnosis to diagnose and guide acupuncture treatment, including ascertaining when the treatment has concluded. The "root" treatment involves manipulation of the body's Qi without penetration of the needle. There has been little research into the physiologic correlates of the changes detected through pulse diagnosis by Traditional East Asian Medicine practitioners practicing TMT. Objectives: The study objective was to investigate whether there were any concurrent changes in physiologic cardiovascular variables, specifically the Central (Buckberg) Sub Endocardial Viability Ratio (SEVR) or Heart Rate (HR) adjusted Augmentation Index (AI), with changes in the radial pulses produced by a TMT "root treatment." Materials and methods: A parallel, single-blind, randomized controlled design was utilized. Sixty-two (62) healthy volunteers were randomized to receive either a TMT root treatment or a sham-treatment. Two (2) TMT practitioners participated, with the same practitioner conducting the needling in each case. The SEVR and HR-adjusted AI were measured by a third researcher. Statistical analysis: Within-groups analysis (paired Student t-test) and between-groups analysis (analysis of covariance) were used; a p-value of 0.05 was designated as statistically significant. Results: SEVR improved significantly within the treatment group but not in the control group. Conclusions: Results indicate that changes detected in the pulse by the TMT practitioners were associated with a measurable improvement in the SEVR. The findings of this study offer the possibility for further investigation into radial pulse diagnosis practices in an effort to find a physiologic understanding or basis of TMT practice and the system of pulse diagnosis it uses. PMID:23611083

O'Brien, Kylie A; Birch, Stephen; Abbas, Estelle; Movsessian, Paul; Hook, Michael; Komesaroff, Paul A

2013-04-23

82

Preliminary investigations of thermionic converters utilizing HOTEMA and DFVLR electrodes  

SciTech Connect

Experiment results obtained from three thermionic converters using improved electrodes are reported. Two converters with ZrO/sub 2/-Mo cermet electrodes produced by a low pressure plasma spray technique at the DFVLR in Stuttgart were fabricated and tested. The first of this pair of diodes was outgassed and operated at high temperatures and did not show improved thermionic performance. The second of the two was outgassed and operated at more moderate temperatures. An encouraging barrier index of 2.00 eV at T/sub E/ = 1400/sup 0/K was recorded. Additionally, pre- and postoperational diagnostics confirmed that elemental concentrations on the emitter were nearly equal before and after operation. However, these electrodes did not give stable performance at emitter temperatures corresponding to practical ouput power densities. The Mo-Al/sub 2/O/sub 3/, Cr/sub 2/O/sub 3/ eutectic emitter developed by HOTEMA in the Netherlands exhibited stable performance at emitter temperatures up to 1650/sup 0/K. The barrier index at T/sub E/ = 1400/sup 0/K was 2.04 eV. The minimum collector work function as measured by the retarding plot method was 1.53 eV. This low work function may be related to the presence of oxygen (which was verified by postoperational diagnostics) on both the emitter and collector. These results suggest that an emitter of this type has the potential of providing significantly improved thermionic converter performance, and should be investigated further.

Saunders, M.; Danielson, L.; Huffman, F.

1982-11-01

83

[Preliminary investigation of neurasthenic syndrome induced by occupational hazards].  

PubMed

In this article, an investigation on prevalence of neurasthenic syndrome applying the Clinical Operational Diagnostic Criteria formulated by the Editorial Committee of Chinese Journal of Neurology and Psychiatry (1985), in 166 workers exposed to three kinds of occupational hazard including industrial noise, high frequency magnetic field, and benzene compounds, and matching with 166 workers selected from other workshop in same factory as the controls, was carried out in a diesel engine factory at suburban area, Changzhou City. It was found that the prevalence of neurasthenic syndrome in former group were 26.6%, 35.4%, and 33.3%, respectively. In corresponding control group were 1.06%, 4.2%, and zero percent, respectively. The results revealed no statistic difference among three subgroups of the former, but there were significantly higher then that of the control group with P value in 0.01 level. Base on above data, the authors considered that along the development of industrial modernization, the occupational hazardous factors will be seriously affected the workers health from various aspect. Therefore, these occupational health problems, should be concerned as a top priority in industrial hygiene. We also stressed that the personal protective measure must be set up and put into practice immediately, as it may be play an important role to decrease the prevalence of neurasthenic syndrome. Finally, the possible mechanism of occupational hazards damaging the function of C.N.S. and some related questions were briefly discussed. PMID:2636097

Wang, H L

1989-10-01

84

Preliminary investigations of active pixel sensors in Nuclear Medicine imaging  

NASA Astrophysics Data System (ADS)

Three CMOS active pixel sensors have been investigated for their application to Nuclear Medicine imaging. Startracker with 525525 25 ?m square pixels has been coupled via a fibre optic stud to a 2 mm thick segmented CsI(Tl) crystal. Imaging tests were performed using 99mTc sources, which emit 140 keV gamma rays. The system was interfaced to a PC via FPGA-based DAQ and optical link enabling imaging rates of 10 f/s. System noise was measured to be >100e and it was shown that the majority of this noise was fixed pattern in nature. The intrinsic spatial resolution was measured to be 80 ?m and the system spatial resolution measured with a slit was 450 ?m. The second sensor, On Pixel Intelligent CMOS (OPIC), had 6472 40 ?m pixels and was used to evaluate noise characteristics and to develop a method of differentiation between fixed pattern and statistical noise. The third sensor, Vanilla, had 520520 25 ?m pixels and a measured system noise of 25e. This sensor was coupled directly to the segmented phosphor. Imaging results show that even at this lower level of noise the signal from 140 keV gamma rays is small as the light from the phosphor is spread over a large number of pixels. Suggestions for the ideal sensor are made.

Ott, Robert; Evans, Noel; Evans, Phil; Osmond, J.; Clark, A.; Turchetta, R.

2009-06-01

85

A Functional Perspective on Learning and Innovation: Investigating the Organization of Absorptive Capacity  

Microsoft Academic Search

We investigate the intra-organizational antecedents of firm-level absorptive capacity (AC). Specifically, we examine how the functional areas of R&D, manufacturing and marketing contribute to the absorption of knowledge coming from different external knowledge sources. The econometric results on a representative sample of Swiss firms show that non-R&D-based AC plays a significantly different role compared to the standard R&D-based one that

Marcel Bogers; Stephane Lhuillery

2011-01-01

86

Music therapy assessment in school settings: a preliminary investigation.  

PubMed

The present investigation was undertaken in response to music therapists working in school settings for information relating to the availability of music therapy assessments and the feasibility of standardizing an assessment instrument for music therapists to use in school settings. Five research questions were identified, and the music therapy literature was surveyed to compile responses to those questions. Three different online data bases (ERIC, PsycINFO, and Article 1st) were used, covering articles published between 1980 and 1997. Individual hand searches were done of the Arts in Psychotherapy, Journal of Music Therapy, Journal of Research in Music Education, Journal of the International Association of Music for the Handicapped, Music Therapy and Music Therapy Perspectives. The questions and responses were as follows: 1. Which music-based assessment tools are being used with children with disabilities? Little commonality in assessment tools being used by music therapists and researchers was discovered. Of the total 41 studies, 20 (49%) reported using a "named" or "titled" assessment tool, and in the remaining 51% of studies, the authors reported using an untitled, and usually experimenter-designed, original assessment tool. 2. Have certain assessments been used in more than one study? Very limited replication of existing assessments was found. Of the 16 "named" assessments, only 3 were found to be used in more than one research study. 3. Are the actual assessments published along with the articles describing their use? Only 3 of the 20 studies using named assessments were published along with the journal article. Of the remaining 21 studies using original, experimenter-designed assessment tools, only 6 (28%) had the assessment instrument published with the article. 4. What is the primary purpose for using the assessment? Six primary purposes emerged from the review of the literature: to compare with data obtained from other assessment measures or from other populations (39%), as a baseline or pretest measure (29%), to determine eligibility for services or the receipt of treatment (12%), to determine the psychometric properties of the assessment (7%), suitability of the instrument for the given population (7%), and the identification of musical preferences (5%). 5. What are the musical or nonmusic elements being assessed? Musical elements were: music perception (37%), musical aptitude (29%), musical preferences (12%), and attention to/enjoyment of music (2%). Nonmusical behaviors/responses were: self-expression (10%), motor responses (10%), behavioral responses (7%), cognitive development (2%), and acts of communication (2%). 6. What subject populations are being assessed? Subject populations were: children with developmental disabilities/mental retardation (44%), children with autism (10%), children with hearing impairments (17%), "psychiatric" clients or emotionally disturbed (22%), individuals described as "handicapped" (5%), individuals with physical disabilities (2%), and a student with a speech impairment (2%). Nondisabled individuals were also included in 12 of the aforementioned studies. PMID:10932124

Wilson, B L; Smith, D S

2000-01-01

87

Groundwater flow analyses in preliminary site investigations. Modelling strategy and computer codes.  

National Technical Information Service (NTIS)

The analyses of groundwater flow comprised a part of the preliminary site investigations which were carried out by Teollisuuden Voima Oy (TVO) for five areas in Finland during 1987 -1992. The main objective of the flow analyses was to characterize groundw...

V. Taivassalo L. Koskinen K. Meling

1994-01-01

88

A Quantitative Approach to Investigating Spanish HL Speakers' Characteristics and Motivation: A Preliminary Study  

Microsoft Academic Search

The present preliminary study empirically investigated Spanish heritage language (HL) speakers in Spanish for native speakers (SNS) college courses. It focused on their attitudes and motivation to improve their HL and on their varying linguistic competences in that language. A well-established second language acquisition (SLA) motivational model was used as a theoretical framework so that these affective variables could be

igo Yanguas

2010-01-01

89

A Quantitative Approach to Investigating Spanish HL Speakers' Characteristics and Motivation: A Preliminary Study  

ERIC Educational Resources Information Center

The present preliminary study empirically investigated Spanish heritage language (HL) speakers in Spanish for native speakers (SNS) college courses. It focused on their attitudes and motivation to improve their HL and on their varying linguistic competences in that language. A well-established second language acquisition (SLA) motivational model

Yanguas, Inigo

2010-01-01

90

A Quantitative Approach to Investigating Spanish HL Speakers' Characteristics and Motivation: A Preliminary Study  

Microsoft Academic Search

:The present preliminary study empirically investigated Spanish heritage language (HL) speakers in Spanish for native speakers (SNS) college courses. It focused on their attitudes and motivation to improve their HL and on their varying linguistic competences in that language. A well-established second language acquisition (SLA) motivational model was used as a theoretical framework so that these affective variables could be

igo Yanguas

2010-01-01

91

Mechanical Chair Massage and Stress Reduction in the Seriously Mentally Ill Consumer: A Preliminary Investigation  

Microsoft Academic Search

In the present study, the authors evaluate the effectiveness of a mechanical massage chair in reducing stress for people with serious and persistent mental illness. This preliminary investigation involves the use of massage therapy for 19 people with serious mental illness, using a standardized massage protocol. Stress levels were assessed using a 7-point Likert scale, administered before and after each

C. P. Heard; A. Tetzlaff; P. Fryer; L. Fazakas DeHoog; A. M. Johnson; J. Wyburd; J. D. Holmes

2012-01-01

92

18 CFR 367.1830 - Account 183, Preliminary survey and investigation charges.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 2013-04-01 false Account 183, Preliminary survey and investigation...AND NATURAL GAS ACT UNIFORM SYSTEM OF ACCOUNTS FOR CENTRALIZED SERVICE COMPANIES SUBJECT...NATURAL GAS ACT Balance Sheet Chart of Accounts Deferred Debits § 367.1830...

2013-04-01

93

Efficacy of Attention Regulation in Preschool-Age Children Who Stutter: A Preliminary Investigation  

ERIC Educational Resources Information Center

|Purpose: This preliminary investigation assessed the attentional processes of preschool-age children who do (CWS) and do not stutter (CWNS) during Traditional cueing and Affect cueing tasks. Method: Participants consisted of 12 3- to 5-year-old CWS and the same number of CWNS (all boys). Both talker groups participated in two tasks of shifting

Johnson, Kia N.; Conture, Edward G.; Walden, Tedra A.

2012-01-01

94

A Preliminary Investigation into an Integrated Approach to the Planning of Higher Educational Facilities. Final Report.  

ERIC Educational Resources Information Center

Findings are presented of a preliminary investigation into an integrated approach to the planning of higher education facilities. Problems confronting college and university planners are defined; factors affecting current conditions isolated; and opportunities for seeking solutions suggested. In this first step of a two-phase program, resources

Goodfriend, Harvey J; Mosher, Robert

95

A preliminary investigation and analysis of student learning style preferences in further and higher education  

Microsoft Academic Search

In the current further education (FE) and higher education (HE) environment, students are under increasing pressure to perform well and achieve good results. As educators we must strive to enable students to make the most of their higher education by providing an education of the highest quality and enhance the learning experience. This study was undertaken as a preliminary investigation

Katherine Mary Ann Rogers

2009-01-01

96

Preliminary Investigation of Al-Jahra Waste Disposal Site Using Electrical Resistivity (ER) Surveys  

Microsoft Academic Search

In this preliminary study, a surface geophysical investigation consisting of electrical resistivity (ER) survey techniques, one of the most promising techniques was carried out on a pilot area at Al-Jahra waste dumpsite. This dumpsite, which is situated very close to a highly populated city, was decommissioned early 2007 after twenty years of service. The dumpsite was reactivated in August of

Rana A. Al-Fares; Rawa S. Al-Jarallah; Ziad Abdulsalam

97

A Preliminary Investigation of Factors Affecting Employment Motivation in People with Intellectual Disabilities  

ERIC Educational Resources Information Center

|Relatively small numbers of people with intellectual disabilities (ID) are engaging in paid employment and those who are tend to be working only part-time. This preliminary study addressed the question of what factors motivate people with ID to work. The issue was investigated in a sample of 10 young work-age adults attending supported learning

Andrews, Abbye; Rose, John L.

2010-01-01

98

"Capacity is key": investigating new legal provisions in England and Wales for adult safeguarding.  

PubMed

This study aimed to investigate the views and experiences of local Safeguarding Adults Coordinators of the newly implemented Mental Capacity Act 2005. This legislation in England and Wales has both protection and empowerment as its dual goals. Fifteen Safeguarding Adults Coordinators (SACs) employed by local authorities in the London area were interviewed in 2008, and again 2 years later. A total of 12 SACs participated in the 2010 follow-up interviews. The findings are reported here, covering experiences and views on the implementation and uses of the Act. There was overwhelming support for the Act as enhancing people's rights to a life free from abuse, of providing a framework for the assessment of decision-making capacity, and of assisting practitioners in reducing risks and responding to abusive situations. Participants urged better publicity about the Act, more detailed guidance on the new offenses, and greater attention to the interactions with other government policy goals. PMID:23768417

Manthorpe, Jill; Samsi, Kritika; Rapaport, Joan

2013-01-01

99

Investigation of the carbon dioxide sorption capacity and structural deformation of coal  

SciTech Connect

Due to increasing atmospheric CO2 concentrations causing the global energy and environmental crises, geological sequestration of carbon dioxide is now being actively considered as an attractive option to mitigate greenhouse gas emissions. One of the important strategies is to use deep unminable coal seams, for those generally contain significant quantities of coal bed methane that can be recovered by CO2 injection through enhanced coal bed natural gas production, as a method to safely store CO2. It has been well known that the adsorbing CO2 molecules introduce structural deformation, such as distortion, shrinkage, or swelling, of the adsorbent of coal organic matrix. The accurate investigations of CO2 sorption capacity as well as of adsorption behavior need to be performed under the conditions that coals deform. The U.S. Department of Energy-National Energy Technology Laboratory and Regional University Alliance are conducting carbon dioxide sorption isotherm experiments by using manometric analysis method for estimation of CO2 sorption capacity of various coal samples and are constructing a gravimetric apparatus which has a visual window cell. The gravimetric apparatus improves the accuracy of carbon dioxide sorption capacity and provides feasibility for the observation of structural deformation of coal sample while carbon dioxide molecules interact with coal organic matrix. The CO2 sorption isotherm measurements have been conducted for moist and dried samples of the Central Appalachian Basin (Russell County, VA) coal seam, received from the SECARB partnership, at the temperature of 55 C.

Hur, Tae-Bong; Fazio, James; Romanov, Vyacheslav; Harbert, William

2010-01-01

100

Hypnotically Assisted Diaphragmatic Exercises in the Treatment of Stuttering: A Preliminary Investigation  

Microsoft Academic Search

This preliminary study investigates the combined effect of intensive hypnotherapy and diaphragmatic exercises in the management of stuttering. Fifty-nine clients with stuttering were trained to practice abdominal weightlifting to strengthen their respiratory muscles and to improve their diaphragmatic movements. The weightlifting exercises involved lifting a dumbbell (2.04.0 kg) with the abdomen for 2 hours daily for 8 consecutive days. Hypnotherapy

Yalcin Kaya; Assen Alladin

2012-01-01

101

Investigation of polarized-proton target materials by differential calorimetry: preliminary results  

SciTech Connect

A simple differential calorimeter was designed and operated for an investigation of the thermodynamic properties of polarized target materials. The calibration and use of the calorimeter are discussed, after a brief exposition of our motivation for this work. The results of a preliminary study of target materials is presented with emphasis on the relevance of the glass state to dynamic polarization in chemically-doped targets.

Hill, D.A.; Hill, J.J.

1980-10-15

102

A Preliminary Investigation of the Effectiveness of Attachment Therapy for Adopted Children with Reactive Attachment Disorder  

Microsoft Academic Search

The purpose of this preliminary investigation was to examine the effectiveness of attachment therapy for adopted children\\u000a diagnosed with Reactive Attachment Disorder (RAD). Although attachment therapy is widely utilized in the practice community,\\u000a outcomes of such therapy have not been well documented. In this study a pretestposttest one-group design was used with a\\u000a sample of 24 adopted children who received

Jane S. Wimmer; M. Elizabeth Vonk; Patrick Bordnick

2009-01-01

103

Detection of Darbepoetin Alfa Misuse in Urine and Blood: A Preliminary Investigation  

Microsoft Academic Search

MORKEBERG, J., C. LUNDBY, G. NISSEN-LIE, T. K. NIELSEN, P. HEMMERSBACH, and R. DAMSGAARD. Detection of Darbepoetin Alfa Misuse in Urine and Blood: A Preliminary Investigation. Med. Sci. Sports Exerc., Vol. 39, No. 10, pp. 1742-1747, 2007. Introduction: Darbepoetin alfa is a modified erythropoietin (EPO) molecule with a longer serum half-life than recombinant human erythropoietin (rhEPO). Because the detection period

JAKOB MORKEBERG; CARSTEN LUNDBY; GRO NISSEN-LIE; THOMAS KJAEREM NIELSEN; PETER HEMMERSBACH; RASMUS DAMSGAARD

104

Preliminary investigations on available and potentially available phosphorus using electro-ultrafiltration (EUF)  

Microsoft Academic Search

SummaryPreliminary investigations were carried out on calcareous silty loam (clay content 25%, pH 8.0) at the Cotton Research Institute,\\u000a Multan to determine the solubility and desorption rates of phosphorus at various soil depths throughout the cotton growing\\u000a season using the EUF technique. The treatments included two applications of single superphosphate, equivalent to 0, 75, 150,\\u000a 250 and 350 kg P2O5\\/ha.

M. A. Taha; M. N. Malik; M. I. Makhdum; F. I. Chaudhry

1982-01-01

105

A Preliminary Investigation of the Management of Alcohol Dependence With Naltrexone by Primary Care Providers  

Microsoft Academic Search

PURPOSE: To describe a preliminary investigation of a model of naltrexone therapy and counselling for use by primary care providers and evaluate its impact on drinking behaviors in a cohort of alcohol-dependent subjects.PATIENTS AND METHODS: The subjects enrolled in this study were 29 alcohol-dependent individuals. They were managed within a primary care treatment model located at a university-affiliated substance research

Patrick G OConnor; Conor K Farren; Bruce J Rounsaville; Stephanie S OMalley

1997-01-01

106

The effect of Cinnamaldehyde on mucositis and salivary antioxidant capacity in gamma-irradiated rats (a preliminary study)  

PubMed Central

Background and purpose of the study The aim of this study was to investigate the effect of cinnamaldehyde on mucositis and salivary total antioxidant capacity in gamma-irradiated rats. Methods The study was conducted on 28 male Wistar rats, 711 weeks of age and 160??20 g body weight, divided into four groups of seven rats each. The first group receiving normal saline (S), the second group receiving saline and gamma radiation (SR), the third group receiving 50 mg/kg cinnamaldehyde 98% (C), and the fourth group receiving 50 mg/kg cinnamaldehyde 98% and gamma radiation (CR). SR and CR groups were exposed to 15 Gy gamma irradiation for 7 min and 39 s. Rats were intraperitoneally injected each day during the 10-day period of the experiment, and their tongues and lips were examined to assess the incidence and severity of mucositis. The saliva samples were taken from the animals three times on day zero, six, and ten. Results The mean mucositis incidence appeared to be delayed in the CR than the SR group (P?=?0.024), and the severity was significantly higher in the SR compared to the CR group;the difference was statistically significant on the second?day (P?=?0.027). In the evaluation of salivary antioxidant capacity, salivary antioxidant concentration was significantly higher in the C than the S, SR, and CR groups on the tenth day of the experiment (p <0.05). Conclusion The clinical effects in the CR group seem to be due to antioxidant, anti-bacterial and anti-inflammatory effects of cinnamaldehyde; this conclusion, however, requires further investigations. Delayed antioxidant effect in the CR group was evident in ip cinnamaldehyde injection, the exact mechanism is not clear.

2012-01-01

107

Investigation of an improved relativistic backward wave oscillator in efficiency and power capacity  

SciTech Connect

Investigation of relativistic backward wave oscillator with high efficiency and power capacity is presented in this paper. To obtain high power and high efficiency, a TM{sub 021} mode resonant reflector is used to reduce the pulse shortening and increase power capacity to about 1.7 times. Meanwhile, an extraction cavity at the end of slow wave structure is employed to improve the efficiency from less than 30% to over 40%, through the beam-wave interaction intensification and better energy conversion from modulated electron beam to the electromagnetic field. Consistent with the numerical results, microwave with a power of 3.2 GW, a frequency of 9.75 GHz, and a pulse width of 27 ns was obtained in the high power microwave generation experiment, where the electron beam energy was configured to be {approx}910 kV and its current to be {approx}8.6 kA. The efficiency of the RBWO exceeds 40% at a voltage range of 870 kV-1000 kV.

Song, W.; Chen, C. H.; Sun, J.; Zhang, X. W.; Shao, H.; Song, Z. M.; Huo, S. F.; Shi, Y. C.; Li, X. Z. [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China)

2012-10-15

108

In-depth investigation of escalator riding accidents in heavy capacity MRT stations.  

PubMed

In 2000, the accident rate for escalator riding was about 0.815 accidents per million passenger trips through Taipei Metro Rapid Transit (MRT) heavy capacity stations. In order to reduce the probability and severity of escalator riding accidents and enhance the safety of passengers, the Drury and Brill model [Drury, C.G., Brill, M., 1983. Human factors in consumer product accident investigation. Hum. Factors 25 (3), 329-342] for in-depth investigation was adopted to analyze the 194 escalator riding accidents in terms of victim, task, product and environment. Prevention measures have been developed based on the major causes of accidents and other related contributing factors. The results from the analysis indicated that the majority of the escalator riding accidents was caused by passengers' carrying out other tasks (38 cases, including carrying luggage 24 cases, looking after accompany persons 9 cases, and 5 others), loss of balance (26 cases, 13.4%), not holding the handrail (20 cases, 10.3%), unhealthy passengers (18 cases, 9.3%), followed by people struck by other passenger (16 cases, 8.2%). For female passengers aged 15-64 years, their rushing for trains accidents could have been prevented by wearing safer footwear or by appropriate signing being provided indicating the location and traveling direction of escalators. Female passengers aged 65 years and above whose accidents were caused by loss of balance, should be encouraged to take the elevator instead. To prevent entrapment injuries, following a stricter design code can be most effective. Further in-depth accident investigation is suggested to cover the activity of the victim prior to the accident, any involved product, the location of the accident on the escalator, any medical treatment, what went wrong, opinion of the respondent on the causes of the accident, and personal characteristics of the passengers. Also, management must trade off productivity and safety appropriately to prevent "Organizational Accidents". PMID:16434013

Chi, Chia-Fen; Chang, Tin-Chang; Tsou, Chi-Lin

2006-01-23

109

Preliminary results of numerical investigations at SECARB Cranfield, MS field test site  

NASA Astrophysics Data System (ADS)

The Southeast Regional Carbon Sequestration partnership sponsored by DOE has chosen the Cranfield, MS field as a test site for its Phase II experiment. It will provide information on CO2 storage in oil and gas fields, in particular on storage permanence, storage capacity, and pressure buildup as well as on sweep efficiency. The 10,300 ft-deep reservoir produced 38 MMbbl of oil and 677 MMSCF of gas from the 1940's to the 1960's and is being retrofitted by Denbury Resources for tertiary recovery. CO2 injection started in July 2008 with a scheduled ramp up during the next few months. The Cranfield modeling team selected the northern section of the field for development of a numerical model using the multiphase-flow, compositional CMG-GEM software. Model structure was determined through interpretation of logs from old and recently-drilled wells and geophysical data. PETREL was used to upscale and export permeability and porosity data to the GEM model. Preliminary sensitivity analyses determined that relative permeability parameters and oil composition had the largest impact on CO2 behavior. The first modeling step consisted in history-matching the total oil, gas, and water production out of the reservoir starting from its natural state to determine the approximate current conditions of the reservoir. The fact that pressure recovered in the 40 year interval since end of initial production helps in constraining boundary conditions. In a second step, the modeling focused on understanding pressure evolution and CO2 transport in the reservoir. The presentation will introduce preliminary results of the simulations and confirm/explain discrepancies with field measurements.

Choi, J.; Nicot, J.; Meckel, T. A.; Chang, K.; Hovorka, S. D.

2008-12-01

110

An investigation of capacity fading of manganese spinels stored at elevated temperature  

SciTech Connect

The storage characteristics of a manganese spinel at various discharge depths and 80 C were examined in 1 M LiPF{sub 6} ethylene carbonate/dimethyl carbonate (1:2 by volume) electrolyte. The quantities of Mn dissolution and discharge-capacity loss were measured after the cathode at each discharge depth had been exposed to the electrolyte at 80 C. The quantities of dissolved manganese in the solution were less than 1.2% of the total manganese in all cathodes examined. Little capacity fading (3%) was found in the fully charged cathode, but a 59% capacity loss was observed in the fully discharged cathode. Correlations of the capacity loss with the X-ray diffraction peak widths were found, and the amount of capacity loss increased with broadening peak width. On the other hand, no correlation between the amount of Mn dissolution and the capacity loss was found. From these results, the authors propose a mechanism of the capacity fading of the spinel LiMn{sub 2}O{sub 4} stored at elevated temperatures as follows: lattice defects in the spinel due to Mn dissolution cause disordered crystal structures and as a result, the Li insertion-extraction paths are blocked, leading to capacity fading.

Inoue, Takao; Sano, Mitsuru [Nagoya Univ. (Japan). Graduate School of Human Informatics

1998-11-01

111

An investigation of capacity and safety in near-terminal airspace for guiding information technology adoption  

Microsoft Academic Search

The nation's air traffic infrastructure, operating under current rules, regulations, practices, and technologies, is approaching its capacity. At some future date, it will be unable to accommodate an increase in air traffic. Travellers, airline operators, industry, and government all desire to see capacity increased in order to avoid delays, increased costs, inconveniences, and negative impacts on the economy. Various information

Rudolph Clinton Haynie

2002-01-01

112

Efficacy of attention regulation in preschool-age children who stutter: A preliminary investigation  

PubMed Central

Purpose This preliminary investigation assessed the attentional processes of preschoolage children who do (CWS) and do not stutter (CWNS) during Traditional cueing and Affect cueing tasks. Method Participants consisted of 12 3- to 5-year-old CWS and the same number of CWNS (all boys). Both talker groups participated in two tasks of shifting and focusing attention: (a) Traditional cueing and (b) Affect cueing. The Affect cueing task was preceded by stress-heightening instructions intended to influence participants' emotionality. In both tasks participants provided non-speech motor responses (i.e., button pressing) to computer-presented target stimuli. Targets were preceded by a visual cue (i.e., highlighted box) occurring in the same (i.e., Valid trials) or opposite (i.e., Invalid trials) location as the target stimuli. Reaction times (RT) were measured (in ms) from the onset of the target stimuli to the onset of the non-speech motor response. Errors were tallied for both experimental conditions and were categorized by type. Results Findings of this preliminary investigation indicated that there were no significant between-group differences in RT or frequency of erroneous responses. There were differences in error type that were correlated with RT for both CWS and CWNS when stress-heightening instructions were introduced. Conclusion Preliminary findings suggest that speed of attentional disengaging, shifting and re-engaging does not differ between preschool-age CWS and CWNS during the experimental paradigm employed in this study and that introducing stress-heightening instructions does affect components of performance for both preschool-age CWS and CWNS. Caveats for the present study include a limited sample size of young preschool-aged children as well as methodological concerns. Learning outcomes Readers will be able to: (1) Define attention regulation and describe findings that investigate the role of attention regulation in developmental stuttering of preschool-age children; (2) Describe the components of attention regulation employed during a Posner Cueing Task; (3) Describe the findings of the present study in relation to other studies investigating attention regulation and developmental stuttering in preschool-age children.

Johnson, Kia N.; Conture, Edward G.; Walden, Tedra A.

2012-01-01

113

High Temperature Category III Plastic Vent Pipe Investigation: Preliminary Results. Topical Report, July-December 1994.  

National Technical Information Service (NTIS)

This report presents the preliminary results of studies conducted at Battelle and Canadian Gas Research Institute (CGRI), and includes preliminary recommendations for reducing the potential for failure of plastic Category III venting systems. Analysis of ...

A. L. Rutz G. H. Stickford S. G. Talbert R. E. Barrett A. E. Weller V. McGinniss D. R. Stephens A. L. P. Joseph

1994-01-01

114

Capacity investigation of brine-bearing sands of the Fwwm formation for geologic sequestration of CO{sub 2}  

SciTech Connect

The capacity of fluvial brine-bearing formations to sequester CO{sub 2} is investigated using numerical simulations of CO{sub 2} injection and storage. Capacity is defined as the volume fraction of the subsurface available for CO{sub 2} storage and is conceptualized as a product of factors that account for two-phase flow and transport processes, formation geometry, formation heterogeneity, and formation porosity. The space and time domains used to define capacity must be chosen with care to obtain meaningful results, especially when comparing different authors' work. Physical factors that impact capacity include permeability anisotropy and relative permeability to CO{sub 2}, brine/CO{sub 2} density and viscosity ratios, the shape of the trapping structure, formation porosity and the presence of low-permeability layering.

Doughty, Christine; Pruess, Karsten; Benson, Sally M.; Hovorka, Susan D.; Knox, Paul R.; Green, Christopher T.

2001-05-01

115

Technology Transfer from Acquisition FDI and the Absorptive Capacity of Domestic Firms: An Empirical Investigation  

Microsoft Academic Search

This paper seeks to establish the role of absorptive capacity in technology transfer from acquisition FDI in U.K. manufacturing. It finds that the rate of productivity change following a foreign take-over is higher the higher the pre-acquisition productivity level of the acquired firm, indicating the importance of absorptive capacity. However, beyond some critical level of initial productivity, the rate of

Sourafel Girma

2005-01-01

116

An investigation of capacity and safety in near-terminal airspace for guiding information technology adoption  

NASA Astrophysics Data System (ADS)

The nation's air traffic infrastructure, operating under current rules, regulations, practices, and technologies, is approaching its capacity. At some future date, it will be unable to accommodate an increase in air traffic. Travellers, airline operators, industry, and government all desire to see capacity increased in order to avoid delays, increased costs, inconveniences, and negative impacts on the economy. Various information technology (IT) based solutions have been proposed and/or fielded as a means to extend or augment human capabilities in an effort to increase capacity. Although there is promise in the ability of IT to increase capacity, there is very little scholarly literature and no verifiable proof that capacity is related to safety. My effort examined the relationship between capacity and safety and illustrates its interactive nature. Understanding this relationship is a major consideration when determining whether to adopt information-based technologies, the employment of which should be aimed at increasing safety and capacity, not as individual entities or quantitative values, but as inextricably related and vital components of the air traffic infrastructure. My thesis was that the differences between increasing or decreasing demand on available capacity influence the levels of safety. Further, information technology solutions will have a direct effect on whether increased demand can be accommodated safely while remaining within the constraints imposed by current operational practices and rules. The primary research effort involved collection and analysis of landing time intervals observed between arrival aircraft at selected locations. This effort assumes that a snapshot of current operating practices and procedures is obtainable by observing and recording how aircraft separation standards are actually employed at various airports. The primary data collection also assumed that audio and visual monitoring of aircraft and tower operations provided insights in establishing a relationship between safety and capacity, because difficulties encountered by aircraft pilots or air traffic controllers at high-demand times can be observed and understood. Historical evidence to support the hypothesis that safety and capacity have a relationship was shown in two ways. The first historical correlation establishes a relationship between historical demands with safety incidents filed at the four airports under study. The second historical correlation relied on near mid-air collision reports filed at the thirty-one busiest airports in the United States and also correlated these reports with the recorded demand on the facility at the time. A potential information technology process was developed and employed to demonstrate that a safety-capacity relationship exists and that selecting the appropriate information technologies for aircrews, aircraft, and controllers is the only viable means of achieving an increase in both safety and capacity. The primary landing time interval data obtained at LaGuardia was used to demonstrate the current state and the benefits of potential improvements. This effort is the only known experimental or empirical effort to establish that a relationship between capacity and safety exists. All the evidence and findings support my thesis and the three additional sub-hypotheses, which hypothesize that there is a relationship between capacity and safety. My research also shows that current rules, technologies, and methods of operation in near-terminal airspace appear to artificially limit the ability of the existing air traffic control system to safely handle the projected growth in aircraft operations. A paradigm shift in the way aircraft are controlled is required if the National Airspace System is to safely accommodate increases in operational demand.

Haynie, Rudolph Clinton

117

Scaling the Information Load of Occupations: Preliminary Findings of the Fit between Individual Capacities and Environmental Demands  

ERIC Educational Resources Information Center

|Person-Environment (P-E) fit models provide a conceptually powerful way to think about career development, vocational choice, and occupational success. The work reported here focuses on yet another pair of P-E criteria: self-reported individual capacity for information processing (the ability to tolerate information overload from a variety of

Haase, Richard F.; Ferreira, Joaquim Armando G. A.; Santos, Eduardo J. R.; Aguayo, Gina M.; Fallon, Melissa M.

2008-01-01

118

A Preliminary Investigation of Acceptance and Commitment Therapy as a Treatment for Marijuana Dependence in Adults  

PubMed Central

In this investigation, 3 adults who met criteria for marijuana dependence were treated using an abbreviated version of acceptance and commitment therapy (ACT). The treatment was delivered in eight weekly 90-min individual sessions. The effects of the intervention were assessed using a nonconcurrent multiple baseline across participants design. Self-reported marijuana use, confirmed through oral swabs, reached zero levels for all participants at posttreatment. At a 3-month follow-up, 1 participant was still abstinent and the other 2 were using but at a lower average level of consumption compared to baseline. Depression, anxiety, withdrawal symptoms, and general levels of experiential avoidance generally improved. This preliminary test suggests that additional development and testing of ACT for marijuana use are warranted.

Twohig, Michael P; Shoenberger, Deacon; Hayes, Steven C

2007-01-01

119

Hypnotically assisted diaphragmatic exercises in the treatment of stuttering: a preliminary investigation.  

PubMed

This preliminary study investigates the combined effect of intensive hypnotherapy and diaphragmatic exercises in the management of stuttering. Fifty-nine clients with stuttering were trained to practice abdominal weightlifting to strengthen their respiratory muscles and to improve their diaphragmatic movements. The weightlifting exercises involved lifting a dumbbell (2.0-4.0 kg) with the abdomen for 2 hours daily for 8 consecutive days. Hypnotherapy was utilized to alleviate anxiety, to boost self-confidence, and to increase motivation for weightlifting exercise. The pre- and postmeasures were statistically significant (p < .001). Results of the study provide support for the effectiveness of hypnotically assisted diaphragmatic training in the management of stuttering but should be further studied in controlled trials. PMID:22443525

Kaya, Yalcin; Alladin, Assen

2012-01-01

120

Preliminary Investigation of the Thermal Decomposition of Ablefoam and EF-AR20 Foam (Ablefoam Replacement)  

SciTech Connect

Preliminary thermal decomposition experiments with Ablefoam and EF-AR20 foam (Ablefoam replacement) were done to determine the important chemical and associated physical phenomena that should be investigated to develop the foam decomposition chemistry sub-models that are required in numerical simulations of the fire-induced response of foam-filled engineered systems for nuclear safety applications. Although the two epoxy foams are physically and chemically similar, the thermal decomposition of each foam involves different chemical mechanisms, and the associated physical behavior of the foams, particularly ''foaming'' and ''liquefaction,'' have significant implications for modeling. A simplified decomposition chemistry sub-model is suggested that, subject to certain caveats, may be appropriate for ''scoping-type'' calculations.

ULIBARRI, TAMARA A.; DERZON, DORA K.; ERICKSON, KENNETH L.; CASTANEDA, JAIME N.; BOREK III, THEODORE T.; RENLUND, ANITA M.; MILLER, JILL C.; CLAYTON, DANIEL; FLETCHER, THOMAS H.

2002-01-01

121

Investigation of fracture-matrix interaction: Preliminary experiments in a simple system  

SciTech Connect

Paramount to the modeling of unsaturated flow and transport through fractured porous media is a clear understanding of the processes controlling fracture-matrix interaction. As a first step toward such an understanding, two preliminary experiments have been performed to investigate the influence of matrix imbibition on water percolation through unsaturated fractures in the plane normal to the fracture. Test systems consisted of thin slabs of either tuff or an analog material cut by a single vertical fracture into which a constant fluid flux was introduced. Transient moisture content and solute concentration fields were imaged by means of x-ray absorption. Flow fields associated with the two different media were significantly different owing to differences in material properties relative to the imposed flux. Richards` equation was found to be a valid means of modeling the imbibition of water into the tuff matrix from a saturated fracture for the current experiment.

Foltz, S.D. [New Mexico Univ., Albuquerque, NM (United States). Dept. of Physics and Astronomy; Tidwell, V.C.; Glass, R.J.; Sobolik, S.R. [Sandia National Labs., Albuquerque, NM (United States)

1992-12-31

122

The investigation on cationic exchange capacity of zeolites: The use as selective ion trappers in the electrokinetic soil technique  

Microsoft Academic Search

The cation exchange capacity (CEC) of porous zeolites allows to adsorb in the framework cavities the cations as pollutant heavy metal ions. We investigate the CEC behaviour of different zeolites in different experimental conditions; in solution where the ion's mobility is spontaneous and free and in the electrokinetic system where the ion's mobility is driven by the electric field. The

Ornella Ursini; Edo Lilla; Roberta Montanari

2006-01-01

123

Experimental Investigation of the Carrying Capacity of an Ice Cover (Eksperimentalnye Issledovaniya Gruzopodbemnosti Ledyanogo Pokrova).  

National Technical Information Service (NTIS)

In the report, the author discusses an experimental method permitting one to determine the carrying capacity of an ice cover with adequate accuracy and with minor expenditures of time and resources. Results are given from tests conducted by the author und...

D. F. Panfilov

1972-01-01

124

Investigation to Increase the Viricidal Capacity of Disinfectant, Germicidal and Fungicidal, Phenolic, Dry-Type.  

National Technical Information Service (NTIS)

The straight O-D-1435 Type II disinfectant had little capacity to inactivate the poliovirus type I when used in concentrations up to 15,000 mg/l with contact times up to 24 hours. The Coxsackie A9 and Echo 12 viruses showed no inactivation with 10,000 mg/...

O. J. Sproul

1975-01-01

125

A small capacity steamejector refrigerator: experimental investigation of a system using ejector with movable primary nozzle  

Microsoft Academic Search

This paper describes an experimental study of a steam-ejector refrigerator using an ejector with a primary nozzle that could be moved axially within the mixing chamber section. The effects on coefficient of performance and cooling capacity produced by adjusting the position of the nozzle were studied. The experimental rig and method are described and results are presented which clearly show

Ian W Eames

1997-01-01

126

Contribution of Working Memory Capacity to Children's Reading Comprehension: A Longitudinal Investigation  

ERIC Educational Resources Information Center

|We examined the contribution of working memory capacity to the development of children's reading comprehension. We present data from three waves of a longitudinal study when the children were 7 years (Grade 1), 8 years (Grade 2) and 9 years (Grade 3). Two questions were raised: The first question concerned the developmental changes of the

Seigneuric, Alix; Ehrlich, Marie-France

2005-01-01

127

Preliminary investigation of cement materials in the Taif area, Saudi Arabia  

USGS Publications Warehouse

A preliminary investigation of possible sources of cement rock in the Taft area was made during the latter part of August 1968. Adequate deposits of limestone, clay, quartz conglomerate and sandstone, and pisolitic iron ore, yet no gypsum, were located to support a Cement plant should it prove feasible to establish one in this area. These materials, made up mostly of Tertiary and later sediments, crop out in isolated, inconspicuous low hills in a north- trending belt, 10 to 15 kilometers wide, lying about 90 kilometers to-the east of At Taft. The belt extends for more than 90 kilometers from the vicinity of Jabal 'An in the south to the crushed rock pits at Radwan and beyond in the north. The area is readily accessible either from the Talf-Riyadh highway or from the Taif-Bishah road presently under construction. The limestone, which is quite pure and dense in some localities but dolomitic, argillaceous, and cherty in others, occurs in a variety of colors and would make suitable decorative building stone. The volcanic rocks of the Harrat Hadan, lying directly to the east of the limestone belt, include volcanic ash beds some of which may have been altered to bentonitlc clays. Others may have been lithified and might be suitable for light-weight aggregate. These possibilities remain to be investigated. Precambrian metamorphic rocks lying directly to the south and southeast of Taif were also investigated as possible cement rock sources, but no suitable material was found here.

Martin, Conrad

1970-01-01

128

Investigation of Channel Capacity of Railway Power Lines for Track and Level Cross Monitoring Application  

Microsoft Academic Search

\\u000a Security and monitoring of remote railway tracks and level crosses is an important issue these days in view of terrorist attacks\\u000a and accidents. This paper analyzes the channel capacity of the railway power lines as broad band carrier for developing monitoring\\u000a applications for railways. The BPLC technology has underwent significant advancements through developments in coding and modulation.\\u000a The paper applies

Anish Francis; Geevarghese Titus

129

Investigation of the Capacity of Underground Water Pumping Using Wind Energy in Dhahran  

Microsoft Academic Search

The capacity of pumping ground water with wind energy conversion systems in Dhahran, Saudi Arabia was statistically analyzed.\\u000a Experimental data of half-hourly wind energy measurements made for a period of 5years (19952000) were used in the analysis.\\u000a Seven horizontal-axis wind turbines with different power ratings were considered in the study. Eight water pumps with different\\u000a power ratings to be powered

Ahmet Z. Sahin; Ahmet Bolat; Abdulrahman Al-Ahmari

130

Preliminary Results from an Investigation into Nanostructured Nuclear Radiation Detectors for Non-Proliferation Applications  

SciTech Connect

In recent years, the concept of embedding composite scintillators consisting of nanosized inorganic crystals in an organic matrix has been actively pursued. Nanocomposite detectors have the potential to meet many of the homeland security, non-proliferation, and border and cargo-screening needs of the nation and, by virtue of their superior nuclear identification capability over plastic, at roughly the same cost as plastic, have the potential to replace all plastic detectors. Nanocomposites clearly have the potential of being a gamma ray detection material that would be sensitive yet less expensive and easier to produce on a large scale than growing large, whole crystals of similar sensitivity. These detectors would have a broad energy range and a sufficient energy resolution to perform isotopic identification. The material can also be fabricated on an industrial scale, further reducing cost. This investigation focused on designing and fabricating prototype core/shell and quantum dot (QD) detectors. Fourteen core/shell and four QD detectors, all with the basic consistency of a mixture of nanoparticles in a polymer matrix with different densities of nanoparticles, were prepared. Nanoparticles with sizes <10 nm were fabricated, embedded in a polystyrene matrix, and the resultant scintillators radiation detector properties were characterized. This work also attempted to extend the gamma energy response on both low- and high-energy regimes by demonstrating the ability to detect low-energy and high-energy gamma rays. Preliminary results of this investigation are consistent with a significant response of these materials to nuclear radiation.

,

2012-10-01

131

A preliminary investigation: the impact of microscopic condenser on depth of field in cytogenetic imaging  

NASA Astrophysics Data System (ADS)

As one of the important components of optical microscopes, the condenser has a considerable impact on system performance, especially on the depth of field (DOF). DOF is a critical technical feature in cytogenetic imaging that may affect the efficiency and accuracy of clinical diagnosis. The purpose of this study is to investigate the influence of microscopic condenser on DOF using a prototype of transmitted optical microscope, based on objective and subjective evaluations. After the description of the relationship between condenser and objective lens and the theoretical analysis of the condenser impact on system numerical aperture and DOF, a standard resolution pattern and several cytogenetic samples are adopted to assess the condenser impact on DOF, respectively. The experimental results of these objective and subjective evaluations are in agreement with the theoretical analysis and show that, under the specific intermediate range of condenser numerical aperture ( NAcond ), the DOF value decreases with the increase of NAcond . Although the above qualitative results are obtained under the experimental conditions with a specific prototype system, the methods presented in this preliminary investigation could offer useful guidelines for optimizing operational parameters in cytogenetic imaging.

Ren, Liqiang; Qiu, Yuchen; Li, Zheng; Li, Yuhua; Zheng, Bin; Li, Shibo; Chen, Wei R.; Liu, Hong

2013-02-01

132

Preliminary results from an investigation into nanostructured nuclear radiation detectors for non-proliferation applications  

NASA Astrophysics Data System (ADS)

In recent years, the concept of embedding composite scintillators consisting of nanosized inorganic crystals in an organic matrix has been actively pursued. Nanocomposite detectors have the potential to meet many of the homeland security, non-proliferation, and border and cargo-screening needs of the nation and, by virtue of their superior nuclear identification capability over plastic, at roughly the same cost as plastic, have the potential to replace all plastic detectors. Nanocomposites clearly have the potential of being a gamma ray detection material that would be sensitive yet less expensive and easier to produce on a large scale than growing large, whole crystals of similar sensitivity. These detectors would have a broad energy range and a sufficient energy resolution to perform isotopic identification. The material can also be fabricated on an industrial scale, further reducing cost. This investigation focused on designing and fabricating prototype core/shell and quantum dot (QD) detectors. Fourteen core/shell and four QD detectors, all with the basic consistency of a mixture of nanoparticles in a polymer matrix with different densities of nanoparticles, were prepared. Nanoparticles with sizes <10 nm were fabricated, embedded in a polystyrene matrix, and the resultant scintillators' radiation detector properties were characterized. This work also attempted to extend the gamma energy response on both low- and high-energy regimes by demonstrating the ability to detect low-energy and high-energy gamma rays. Preliminary results of this investigation are consistent with a significant response of these materials to nuclear radiation.

Guss, Paul; Guise, Ronald; Yuan, Ding; Mukhopadhyay, Sanjoy

2012-10-01

133

Preliminary investigation of absent nociceptive flexion reflex responses among more symptomatic women with fibromyalgia syndrome.  

PubMed

Fibromyalgia syndrome (FMS) is a widespread musculoskeletal pain condition with unclear physiologic mechanisms. The purpose of this investigation was to compare the responsiveness of nociceptive flexion reflex (NFR) pathways between women with and without FMS. A secondary purpose was to examine the influence of depression, fibromyalgia symptom severity, and cardiovascular health on NFR responses among women with FMS. Fifteen women with FMS and 14 healthy controls participated in an experimental session to assess NFR responses to sural nerve stimulation, resting mean arterial pressure (MAP) and heart rate (HR), and scores on the Beck Depression Inventory (BDI) and Fibromyalgia Impact Questionnaire (FIQ). NFR responses were successfully elicited from all healthy individuals, but only eight (53%) of the women with FMS. These women did not differ in the minimum stimulus intensity required to elicit an NFR response compared to healthy controls (p?0.35). Further, these women had lower BDI (p=0.04) and FIQ (p=0.02) scores compared to women with FMS from whom NFR responses could not be elicited. Resting HR was higher in both groups of women with FMS compared to healthy individuals (p<0.05), and MAP was strongly associated with NFR thresholds only among women with FMS (r=0.88, p<0.01). Findings from this preliminary investigation suggest that NFR pathways are impaired in women who are more severely impacted by symptoms of depression and fibromyalgia, potentially due to desensitization of NFR pathways with chronic autonomic arousal. PMID:23553516

Umeda, Masataka; Corbin, Lisa W; Maluf, Katrina S

2013-04-04

134

A preliminary investigation into the development of 3-D printing of prosthetic sockets.  

PubMed

The socket is considered an element of major importance in the makeup of a prosthesis. Each socket is a tailor-made device, designed to fit the unique geometry of the patient's residual limb. The design and manufacture of a prosthetic socket traditionally has been a manual process that relies on the use of plaster of Paris casts to capture the shape of the patient's residual limb and then artisan fabrication techniques to manufacture the socket. Computer-aided design and manufacturing technologies have overcome some of the shortcomings of the traditional process, but the final manufacture of the prosthetic socket is still performed manually. Rapid prototyping (RP), a relatively new class of manufacturing technologies, creates physical models directly from three-dimensional (3-D) computer data. Previous research into the application of RP systems to the manufacture of prosthetic sockets has focused on expensive, high-end technologies that have proven too expensive. This paper investigates the use of a cheaper, low-end RP technology known as 3-D printing. Our investigation was an initial approach to using a technology that is normally associated with producing prototypes quickly, some of which could not be manufactured by alternative means. Under normal circumstances, these printed components are weak and relatively fragile. However, comfortable prosthetic sockets manufactured with 3-D printing have been used in preliminary fittings with patients. PMID:15944878

Herbert, Nicholas; Simpson, David; Spence, William D; Ion, William

135

Cocos nucifera Linn. (Palmae) husk fiber ethanolic extract: antioxidant capacity and electrochemical investigation.  

PubMed

The present study aims to determine the antioxidant capacity of the ethanolic extracts of husk fiber of four coconut (Cocos nucifera L.) varieties (yellow dwarf, green dwarf, giant and hybrid) and to evaluate the electrochemical behavior of these extracts on a glassy carbon electrode and on a modified glassy carbon electrode. The highest values of total phenolic content were obtained for the hybrid (531 24 mg GAE g(-1) dry extract) and yellow dwarf (501 29 mg GAE g(-1) dry extract) varieties and the lowest was for the green dwarf variety with 58 9 mg GAE g(-1) dry extract. The ability of the extracts to scavenge DPPH? radicals was in the order of giant > yellow dwarf > hybrid > green dwarf and the IC50 values varied from 8.6 to 55.9 ?g mL(-1). All varieties showed reducing potential by the use of FRAP and CUPRAC methods, with the lowest performance obtained for the green dwarf variety. Additionally, through the use of mimetic biomembranes, ethanolic extracts of coconut husk were shown to protect lipids against oxidative damage independent of the variety. The main antioxidants identified in the extract of yellow dwarf variety by UPLC-MS were quercetin and catechin. Cyclic voltammetric studies of the ethanolic extracts on glassy carbon electrode confirmed the presence of easily oxidized compounds, and the high antioxidant capacity of the varieties. This capacity was expressed as mg quercetin equivalents g(-1) dry extract and ranged from 25.9 up to 53.5 mg QE g(-1). A poly-xanthurenic acid (poly-Xa)/multi-walled carbon nanotube (MWCNT) / glassy carbon modified electrode (poly-Xa/MWCNT/GCE) was used for this purpose. Our findings suggest that these extracts are potentially important antioxidant supplements for the everyday human diet, pharmaceutical and cosmetic industries, thereby aggregating value to the enormous amount of waste from the coconut industry, mostly used for burning purposes. PMID:23092165

Oliveira, Monika Bezerra dos Santos; Valentim, Iara Barros; de Vasconcelos, Camila Calado; Omena, Cristhiane Maria Bazlio; Bechara, Etelvino Jos Henriques; da Costa, Joo Gomes; Freitas, Mikael de Lima; Sant'Ana, Antnio Euzbio Goulart; Goulart, Marlia Oliveira Fonseca

2013-02-01

136

Preliminary Geophysical Investigations of the Ship Rock Diatreme, Navajo Nation, New Mexico  

NASA Astrophysics Data System (ADS)

Magnetic and gravity data were collected at the Ship Rock minette neck and dikes, part of the Navajo volcanic field in the central Colorado Plateau, to investigate their subsurface structure. The deep root system of Ship Rock, an exhumed Oligocene maar-diatreme complex, has not been resolved. The diatreme is largely composed of minette tuff-breccia with a large wallrock fraction, whereas the dikes are composed of hypabyssal minette. The country rock is the Upper Cretaceous Mancos Shale. Density and magnetic contrasts between the igneous rock and surrounding shale suggest that the buried structure of Ship Rock can be imaged. Preliminary geophysical investigations were carried out in order to test this hypothesis. We collected magnetic and gravitational data along four lines selected to transect the major south and northeast dikes and to partly encircle the diatreme. Modeling differently sized, oriented and shaped intrusions, we created theoretical Free Air anomaly curves to try to match the two clearest anomalies. Modeling necessitates (i) that the major north-south dike dips west and (ii) the presence of a high-density, deep body near the diatreme. The Free Air anomaly curves show that smaller dikes might not be detected from gravity data; however, they are necessary to determine the presence of large, dense bodies. Although not modeled, the magnetics curves show that smaller dikes can easily be detected. Our study results are promising, and we plan a more thorough investigation in the future which will produce a magnetic map to determine if further buried dikes exist in the vicinity, and measure gravity along additional profiles to better constrain the location of the dense body at depth.

Gruen, E. M.; McCarthy, L.; Namingha, G.; Bank, C.; Noblett, J.; Semken, S.

2003-12-01

137

Usefulness of the Human Body as a Metaphor to Study the Resilience of Systems and Enterprises: A Preliminary Investigation  

Microsoft Academic Search

Resilience is an important attribute that systems and enterprises require in order to survive in today's challenging, unpredictable and competitive environment. The human body could be a useful metaphor to study the concept of resilience and to extract resilience lessons. This assumption is tested here in this preliminary investigation, by considering simplified versions of three typical scenarios that humans face:

Devanandham Henry; Dinesh Verma

2009-01-01

138

The Adaptation of the Mathematics Anxiety Rating Scale-Elementary Form into Turkish, Language Validity, and Preliminary Psychometric Investigation  

ERIC Educational Resources Information Center

|The purpose of the present study was to adapt the Mathematics Anxiety Rating Scale- Elementary Form (MARS-E, Suinn, 1988) into Turkish by first doing the translation of its items and then the preliminary psychometric investigation of the Turkish form. The study included four different samples: 30 bilingual language experts, 50 Turkish language

Baloglu, Mustafa; Balgalmis, Esra

2010-01-01

139

Combination of Modafinil and d-amphetamine for the Treatment of Cocaine Dependence: A Preliminary Investigation  

PubMed Central

Background: Two stimulant medications, modafinil and d-amphetamine, when tested individually, have shown safety and efficacy for treatment of cocaine addiction. We hypothesized that the combination of modafinil and d-amphetamine, at low doses, would show equivalent or greater benefit in reducing cocaine use compared to higher doses of each individual medication or placebo. Methods: Sixteen week, randomized, parallel-group design with four treatment arms comparing placebo to modafinil 400?mg; d-amphetamine 60?mg; modafinil 200?mg plus d-amphetamine 30?mg. Primary outcome variables, retention and cocaine use, were analyzed on the sample of 73 participants who received the first dose of the study medication. Results: Retention rates did not differ between groups and were generally low, with 40% remaining in treatment at week 12 and 20% at week 16. Participants receiving the combination of modafinil and d-amphetamine showed a trend of increased cocaine use over time with a corresponding low Bayesian probability of benefit (33%). Relatively better cocaine outcomes were observed in the placebo and d-amphetamine only groups. The study medications were generally well-tolerated with few adverse effects, yet rates of adherence were suboptimal (?80%). Conclusion: Data from this preliminary investigation fail to provide evidential support for conducting a larger study of this dual-agonist medication combination for treatment of cocaine dependence.

Schmitz, Joy M.; Rathnayaka, Nuvan; Green, Charles E.; Moeller, F. Gerard; Dougherty, Anne E.; Grabowski, John

2012-01-01

140

Preliminary investigation of the frequency response and distortion properties of nonlinear image processing algorithms  

NASA Astrophysics Data System (ADS)

Assessment of the resolution properties of nonlinear imaging systems is a useful but challenging task. While the modulation transfer function (MTF) fully describes contrast resolution as a function of spatial frequency for linear systems, an equivalent metric does not exist for systems with significant nonlinearity. Therefore, this preliminary investigation attempts to classify and quantify the amount of scaling and distortion imposed on a given image signal as the result of a nonlinear process (nonlinear image processing algorithm). As a proof-of-concept, a median filter is assessed in terms of its principle frequency response (PFR) and distortion response (DR) functions. These metrics are derived in frequency space using a sinusoidal basis function, and it is shown that, for a narrow-band sinusoidal input signal, the scaling and distortion properties of the nonlinear filter are described exactly by PFR and DR, respectively. The use of matched sinusoidal basis and input functions accurately reveals the frequency response to long linear structures of different scale. However, when more complex (multi-band) input signals are considered, PFR and DR fail to adequately characterize the frequency response due to nonlinear interaction effects between different frequency components during processing. Overall, the results reveal the context-dependent nature of nonlinear image processing algorithm performance, and they emphasize the importance of the basis function choice in algorithm assessment. In the future, more complex forms of nonlinear systems analysis may be necessary to fully characterize the frequency response properties of nonlinear algorithms in a context-dependent manner.

Wells, Jered R.; Dobbins, James T.

2013-03-01

141

Eastern Mediterranean high resolution paleoclimate investigations using south Adriatic finely laminated sediment: preliminary data  

NASA Astrophysics Data System (ADS)

The formation of distinct organic-rich units (sapropels) in the Medditerenean is well-known, and intensively studied , however less is known of the smaller scale variability during their formation. Multicore GeoB 107-39-03 was taken in 2006, in the central part of the straits of Otranto, south Adriatic. Over the main part of the core, fine, sub-milimetric scale laminae are found. Preliminary dating indicates a Sapropel 1 age for these sediments. The fine, laminae permit high-resolution climate variability to be studied in this area during sapropel formation. Besides conventional geochemical analyses on discrete samples (XRF, ICP-OES, organic C/N, 13C) a novel technique was used to investigate the sediment chemistry at the laminae scale: the sediment has been resin-impregnated to enable laser ablation coupled to ICP-MS analyses (LA-ICP-MS). This method recently developed (Jilbert et al., 2008) permits extremely high resolution geochemical profiling of the laminated sediment, to unravel the forcing mechanisms generating the laminae. Furthermore, in order to compare the data to modern sediment geochemistry, a series of analyses were carried out on a batch of sediment surface samples in collaboration with the MOCCHA project partners (see Posters/Talks in session OS15). This work is supported by the EUROCORES/EUROMARC Program of the European Science Foundation (NWO.817.01.002 MOCCHA project).

Goudeau, Marie-Louise; Robert, Brice; Jilbert, Tom; Fhlaithearta, Shauna Ni; Zonneveld, K. A. F.; Versteegh, G. J. M.; Grauel, A.; Bernasconi, S.; de Lange, G. J.

2010-05-01

142

Preliminary investigation of the hazard faced by Western Australia from tsunami generated along the Sunda Arc  

NASA Astrophysics Data System (ADS)

Since the Boxing Day tsunami various countries surrounding the Indian Ocean have been investigating the potential hazard from trans-Indian Ocean tsunami generated along the Sunda Arc, south of Indonesia. This study presents some preliminary estimates of the tsunami hazard faced by Western Australia from tsunami generated along the Arc. To estimate the hazard, a suite of tsunami spaced evenly along the subduction zone to the south of Indonesia were numerically modelled. Offshore wave heights from tsunami generated in this region are significantly higher along northwestern part of the Western Australian coast from Exmouth to the Kimberly than they are along the rest of the coast south of Exmouth. Due to the offshore bathymetry, the area around Onslow in particular may face a higher tsunami than other areas the West Australian coast. Earthquakes between Java and Timor are likely to produce the greatest hazard to northwest WA. Earthquakes off Sumatra are likely the main source of tsunami hazard to locations south of Exmouth, however the hazard here is likely to be lower than that along the north western part of the West Australian coast. Tsunami generated by other sources (eg large intra-plate events, volcanoes, landslides and asteroids) could threaten other parts of the coast.

Burbidge, D.; Cummins, P. R.

2005-12-01

143

Preliminary investigations on the rheology and boundary stresses associated with granular mixtures  

NASA Astrophysics Data System (ADS)

Recent advances in rheological models for monodisperse dense granular materials are exciting. However, they do not account for the effect of local particle size distributions on the rheology mixtures of particles. It is well-known that particulate mixtures tend to unmix, and their rheological properties are dependent on species concentration. Typically, expressions for the rheology of dense granular flows are explicitly dependent on particle size. However, there is no indication of what may be used for a representative size in a mixture of particles of different sizes. We find, in the absence of gravity, plane Couette cells present an effective geometry for investigating the rheology of binary mixtures of different sized particles. Unlike the behavior of more sparse systems, we find that the dense systems do not segregate much, indicating the usefulness of the geometry for studying the dependence of the mixture rheology on particle sized distribution systematically. In our preliminary studies we find that the pressure at the boundary has a skewed probability distribution function (pdf). We also find that the pdf of the boundary pressure for a particular mixture scales according to the inertial stress.

Yohannes, B.; Hill, K. M.

2010-05-01

144

Sorption of lead, copper, cadmium, zinc, and nickel by marine algal biomass: characterization of biosorptive capacity and investigation of mechanisms  

Microsoft Academic Search

The marine algae Sargassum sp., Padina sp., Ulva sp., and Gracillaria sp., harvested locally, were investigated for their biosorption performance in the removal of lead, copper, cadmium, zinc, and nickel from dilute aqueous solutions. It was found that the biosorption capacities were significantly affected by solution pH, with higher pH favoring higher metal-ion removal. Kinetic and isotherm experiments were carried

Ping Xin Sheng; Yen-Peng Ting; J. Paul Chen; Liang Hong

2004-01-01

145

Preliminary investigation of an additive approach to the fabrication of precision aspheres.  

National Technical Information Service (NTIS)

We report progress in the aspherization of precision optical substrates via deposition of graded period Mo/Si multilayer coatings using a masking technique. These preliminary results show good agreement between the measured and desired thickness profiles ...

F. W. Weber C. Montcalm S. P. Vernon D. R. Kania

1996-01-01

146

MX Siting Investigation. Water Resources Program. Volume I. Preliminary Water Management Report.  

National Technical Information Service (NTIS)

The preliminary water management planning information in this report represents the integration of over two years of intensive MX Water Resources Program activities in the Nevada-Utah siting area. (Author)

1981-01-01

147

Hazards by shock waves during explosive eruptions: preliminary results of experimental investigations.  

NASA Astrophysics Data System (ADS)

A recent study (Scolamacchia and Shouwenaars, 2009) investigated the nature of microscopic craters on the steel surface of a basketball pole left standing in one of the villages destroyed by the 1982 eruption of El Chichn volcano. The craters were attributed to the impacts of ash particles (70-280 ?m) accelerated by shock waves due to an efficient momentum coupling with a gas phase, such that a sudden expansion of the gas, caused by shock wave propagation, drag the particles up to speeds of 710 to 980 m/s. Several open questions existed on this kind of phenomena. Preliminary tests were performed to investigate the correlation between particle size and the high velocities calculated, based on inner deformation of the steel and crater geometry. We used a shock tube apparatus consisting of a high-pressure (HP) steel autoclave, pressurized with Ar gas, and a low pressure (LP) tank at atmospheric conditions. We used ash and lapilli bulk samples from El Chichn trachyandesites, and lapilli with random irregular shapes obtained by crushing and abrading dacitic blocks from pyroclastic flow deposits of Unzen volcano. The samples were placed inside an autoclave at ambient T and P, located between the HP autoclave and the LP tank. Steel plates (same type of the original impacted material), were fixed to the LP tank walls, 10 cm above the autoclave that contained the samples. Shock waves were generated by the sudden decompression of the Ar gas due to the systematical failure of a diaphragm (which separate the LP from the HP section). Air expansion accelerated the particles from below toward the steel plate. The speed of the particles was measured using a system of 4 copper wires conducting an electric signal. The signals dropped when the particles reached the wires. We used low pressure ranges (3.1 to 9.8 MPa) for all experimental runs, obtaining a range of particles velocities between 40 and 257 m/s. These velocities can be attained by pyroclastic density currents. Higher velocities (205 to 257 m/s) were obtained for smaller grain-sizes, in a range of fine lapilli-medium ash (2.8 to 177 ?m). Lower velocities, 40 m/s to 85 m/s, were attained by medium (8 mm) and fine lapilli (4 mm), respectively. These values seem not directly related to the the material composition. Impacts craters on steel plates were experimentally obtained, but we did not observe a modification of the steel inner structure, as observed in the original impacted pole. These results are in agreement with impacts occurred at low particle velocities, typical for gravity driven currents, as those reached in these experiments. We observed a great reduction in grain-size of samples recovered after all experiments with respect to the original material. Such evidence coud be due not only to the disruption of grains when impacting the metal plate, but also to processes stricly related to shock wave propagation and gas expansion. These preliminary results need to be further investigated.

Scolamacchia, Teresa; Alatorre Ibarguengotia, Miguel; Spieler, Oliver; Dingwell, Donald B.

2010-05-01

148

Preliminary investigation of KTN as a surface acoustic wave infrared/thermal detector  

SciTech Connect

This paper presents the results of preliminary investigations of thin films of KTN (KTa1?xNbxO3) surface acoustic wave (SAW) structures for their suitability as thermal detectors. The goal is to use the technique for infrared (IR) detection and imaging. The thin films (0.6 m) of K(Ta1?xNbx)O3 [x = 0.5] epitaxial films were grown and polished on KTaO3 (0 0 1) substrates approximately 1 mm thick. SAW resonators with a center frequency of approximately 480 MHz were fabricated using these substrates. To form the basis of comparison to commonly used, thermally sensitive SAW substrates, SAW devices using lithium niobate (LiNbO3) as the substrate material were also fabricated. The phase response as a function of temperature for the KTN as well as the LiNbO3 SAW devices was measured with a network analyzer. The largest phase change exhibited by the LiNbO3 was about ?4.7 / C, whereas the largest phase change exhibited by the KTN was about twice as much (11 / C). Assuming a worst case network analyzer phase resolution of 0.5 , this corresponds to a temperature resolution of 0.1 C for the LiNbO3 and 0.05 C for the KTN. By comparison, typical sensitivity of (uncooled) microbolometers is of the order of 50 mK. We believe that with improved fabrication and signal processing, the KTN/SAW-based detection approach can achieve a temperature resolution of better than 50 mK.

Korsah, Kofi [ORNL

2005-01-01

149

Preliminary investigation of KTN as a surface acoustic wave infrared/thermal detector  

SciTech Connect

This paper presents the results of preliminary investigations of thin films of KTN (KTa1 xNbxO3) surface acoustic wave (SAW) structures for their suitability as thermal detectors. The goal is to use the technique for infrared (IR) detection and imaging. The thin films (0.6 m) of K(Ta1 xNbx)O3 [x = 0.5] epitaxial films were grown and polished on KTaO3 (0 0 1) substrates approximately 1mm thick. SAW resonators with a center frequency of approximately 480MHz were fabricated using these substrates. To form the basis of comparison to commonly used, thermally sensitive SAW substrates, SAW devices using lithium niobate (LiNbO3) as the substrate material were also fabricated. The phase response as a function of temperature for the KTN as well as the LiNbO3 SAW devices was measured with a network analyzer. The largest phase change exhibited by the LiNbO3 was about 4.7 / C, whereas the largest phase change exhibited by the KTN was about twice as much (11 / C). Assuming a worst case network analyzer phase resolution of 0.5 , this corresponds to a temperature resolution of 0.1 C for the LiNbO3 and 0.05 C for the KTN. By comparison, typical sensitivity of (uncooled) microbolometers is of the order of 50 mK. We believe that with improved fabrication and signal processing, the KTN/SAW-based detection approach can achieve a temperature resolution of better than 50 mK.

Korsah, Kofi [ORNL; Kisner, Roger [ORNL; Boatner, Lynn A [ORNL; Christen, Hans M [ORNL; Paris, Deidre E [ORNL

2005-01-01

150

Investigation of psychophysical measure for evaluation of similar images for mammographic masses: Preliminary results  

SciTech Connect

We investigated a psychophysical similarity measure for selection of images similar to those of unknown masses on mammograms, which may assist radiologists in the distinction between benign and malignant masses. Sixty pairs of masses were selected from 1445 mass images prepared for this study, which were obtained from the Digital Database for Screening Mammography by the University of South Florida. Five radiologists provided subjective similarity ratings for these 60 pairs of masses based on the overall impression for diagnosis. Radiologists' subjective ratings were marked on a continuous rating scale and quantified between 0 and 1, which correspond to pairs not similar at all and pairs almost identical, respectively. By use of the subjective ratings as 'gold standard', similarity measures based on the Euclidean distance between pairs in feature space and the psychophysical measure were determined. For determination of the psychophysical similarity measure, an artificial neural network (ANN) was employed to learn the relationship between radiologists' average subjective similarity ratings and computer-extracted image features. To evaluate the usefulness of the similarity measures, the agreement with the radiologists' subjective similarity ratings was assessed in terms of correlation coefficients between the average subjective ratings and the similarity measures. A commonly used similarity measure based on the Euclidean distance was moderately correlated (r=0.644) with the radiologists' average subjective ratings, whereas the psychophysical measure by use of the ANN was highly correlated (r=0.798). The preliminary result indicates that a psychophysical similarity measure would be useful in the selection of images similar to those of unknown masses on mammograms.

Muramatsu, Chisako; Li Qiang; Suzuki, Kenji; Schmidt, Robert A.; Shiraishi, Junji; Newstead, Gillian M.; Doi, Kunio [Kurt Rossmann Laboratories for Radiologic Image Research, Department of Radiology, University of Chicago, 5841 S. Maryland Avenue, MC 2026, Chicago, Illinois 60637 (United States)

2005-07-15

151

Investigation of the regenerative capacity of an acellular porcine medial meniscus for tissue engineering applications.  

PubMed

Previously, we have described the development of an acellular porcine meniscal scaffold. The aims of this study were to determine the immunocompatibility of the scaffold and capacity for cellular attachment and infiltration to gain insight into its potential for meniscal repair and replacement. Porcine menisci were decellularized by exposing the tissue to freeze-thaw cycles, incubation in hypotonic tris buffer, 0.1% (w/v) sodium dodecyl sulfate in hypotonic buffer plus protease inhibitors, nucleases, hypertonic buffer followed by disinfection using 0.1% (v/v) peracetic, and final washing in phosphate-buffered saline. In vivo immunocompatibility was assessed after implantation of the acellular meniscal scaffold subcutaneously into galactosyltransferase knockout mice for 3 months in comparison to fresh and acellular tissue treated with ?-galactosidase (negative control). The cellular infiltrates in the explants were assessed by histology and characterized using monoclonal antibodies against: CD3, CD4, CD34, F4/80, and C3c. Static culture was used to assess the potential of acellular porcine meniscal scaffold to support the attachment and infiltration of primary human dermal fibroblasts and primary porcine meniscal cells in vitro. The explants were surrounded by capsules that were more pronounced for the fresh meniscal tissue compared to the acellular tissues. Cellular infiltrates compromised mononuclear phagocytes, CD34-positive cells, and nonlabeled fibroblastic cells. T-lymphocytes were sparse in all explanted tissue types and there was no evidence of C3c deposition. The analysis revealed an absence of a specific immune response to all of the implanted tissues. Acellular porcine meniscus was shown to be capable of supporting the attachment and infiltration of primary human fibroblasts and primary porcine meniscal cells. In conclusion, acellular porcine meniscal tissue exhibits excellent immunocompatibility and potential for cellular regeneration in the longer term. PMID:20695759

Stapleton, Thomas W; Ingram, Joanne; Fisher, John; Ingham, Eileen

2010-09-28

152

Investigation of the Regenerative Capacity of an Acellular Porcine Medial Meniscus for Tissue Engineering Applications  

PubMed Central

Previously, we have described the development of an acellular porcine meniscal scaffold. The aims of this study were to determine the immunocompatibility of the scaffold and capacity for cellular attachment and infiltration to gain insight into its potential for meniscal repair and replacement. Porcine menisci were decellularized by exposing the tissue to freezethaw cycles, incubation in hypotonic tris buffer, 0.1% (w/v) sodium dodecyl sulfate in hypotonic buffer plus protease inhibitors, nucleases, hypertonic buffer followed by disinfection using 0.1% (v/v) peracetic, and final washing in phosphate-buffered saline. In vivo immunocompatibility was assessed after implantation of the acellular meniscal scaffold subcutaneously into galactosyltransferase knockout mice for 3 months in comparison to fresh and acellular tissue treated with ?-galactosidase (negative control). The cellular infiltrates in the explants were assessed by histology and characterized using monoclonal antibodies against: CD3, CD4, CD34, F4/80, and C3c. Static culture was used to assess the potential of acellular porcine meniscal scaffold to support the attachment and infiltration of primary human dermal fibroblasts and primary porcine meniscal cells in vitro. The explants were surrounded by capsules that were more pronounced for the fresh meniscal tissue compared to the acellular tissues. Cellular infiltrates compromised mononuclear phagocytes, CD34-positive cells, and nonlabeled fibroblastic cells. T-lymphocytes were sparse in all explanted tissue types and there was no evidence of C3c deposition. The analysis revealed an absence of a specific immune response to all of the implanted tissues. Acellular porcine meniscus was shown to be capable of supporting the attachment and infiltration of primary human fibroblasts and primary porcine meniscal cells. In conclusion, acellular porcine meniscal tissue exhibits excellent immunocompatibility and potential for cellular regeneration in the longer term.

Ingram, Joanne; Fisher, John; Ingham, Eileen

2011-01-01

153

75 FR 13761 - Fact Finding Investigation No. 26; Vessel Capacity and Equipment Availability in the United...  

Federal Register 2010, 2011, 2012, 2013

...in the United States Export and Import Liner Trades; Order of Investigation March 17...foreign commerce of the United States (``liner service''). In doing so, the Commission...During this economic downturn, U.S. liner exports fell by 14 percent and...

2010-03-23

154

The load capacity of PC\\/ABS spur gears and investigation of gear damage  

Microsoft Academic Search

Recently, Polyamide 66 and Teflon as plastic materials are widely used at the manufacturing of gear mechanism. The using of PC\\/ ABC materials provides many advantages due to fire, air and ultraviolet light durability and low moisture holding properties. In this study, the usability of PC\\/ABS composite plastic materials as spur gear was investigated. PC\\/ABS gears were tested by applying

Rifat Yakut; Mehmet Turan Demirci

155

The investigation on cationic exchange capacity of zeolites: the use as selective ion trappers in the electrokinetic soil technique.  

PubMed

The cation exchange capacity (CEC) of porous zeolites allows to adsorb in the framework cavities the cations as pollutant heavy metal ions. We investigate the CEC behaviour of different zeolites in different experimental conditions; in solution where the ion's mobility is spontaneous and free and in the electrokinetic system where the ion's mobility is driven by the electric field. The aim of this study is to investigate if the CEC is an useful property to create a special interface region of zeolites, that if placed in the electrokinetic cell, just before the cathode, could allow to capture and concentrate the heavy metallic ions, during their migrating process. The zeolite 13X investigated in the electrokinetic proofs, retains a good high ions adsorption, even if quite smaller than the relevant free solution condition and well acts as confined trap for the heavy metal ions. In fact no trace of metallic deposition are present on the electrode's surface. PMID:16716501

Ursini, Ornella; Lilla, Edo; Montanari, Roberta

2006-04-28

156

Synthesis, Physical Properties and Preliminary Investigation of Hemocompatibility of Polyurethanes from Aliphatic Resources with Castor Oil Participation  

Microsoft Academic Search

The synthesis of polyurethanes (PURs) from oligoetherdiol, two low molecular diols, castor oil and 4,4?-Methylenebis(cyclohexylisocyanate) is described. These polymers are characterized by measurements of the mechanical bulk and surface properties, preliminary investigation of compatibility with human blood and calcification in static conditions.The critical surface energy of synthesized PURs is similar to the critical surface energy of natural surfaces. Material-induced hemolysis

A. Szelest-Lewandowska; B. Masiulanis; A. Klocke; B. Glasmacher

2003-01-01

157

Preliminary investigation of an additive approach to the fabrication of precision aspheres  

Microsoft Academic Search

We report progress in the aspherization of precision optical substrates via deposition of graded period Mo\\/Si multilayer coatings using a masking technique. These preliminary results show good agreement between the measured and desired thickness profiles over 85% of the sample, however, thickness deviations of up to 7 % are observed in the central area. The errors are attributed to misalignments

F. W. Weber; C. Montcalm; S. P. Vernon; D. R. Kania

1996-01-01

158

Preliminary Investigation of Manganese-Catalyzed Ozonation for the Destruction of Atrazine  

Microsoft Academic Search

A preliminary experimental study conducted with a conventional bubble ozonation contactor column has shown that small amounts of Mn(II) greatly enhanced the destruction of atrazine by ozone. There is an inversely linear relationship between the dosed Mn(II) concentration and the residual ozone concentration at a specific reaction time. The ozone transfer efficiency into water is greater with the increase of

Jun Ma; Nigel J. D. Graham

1997-01-01

159

Preliminary Investigation of Radiation Level and Some Radionuclides in Imported Food and Food Products.  

National Technical Information Service (NTIS)

A preliminary study of gross beta activity and content of some long-lived radionuclides associated with fission products in various types of imported food and food-products was carried out. Food samples were purchased monthly during 1976-1977 from general...

F. Sinakhom S. Mongkolphantha

1980-01-01

160

A Preliminary Environmental Site Investigation for a Bridge over the Mississippi River at Moline, Illinois  

Microsoft Academic Search

A preliminary environmental site assessment along the alignment of I-74 and its bridge over the Mississippi River was completed by the Illinois State Geological Survey for the Illinois Department of Transportation in 2002. The purpose of the survey was to determine the presence of any environmental concerns, both natural and man-made, that the Illinois DOT might encounter during activities to

C. Trask

161

Preliminary Investigation of the 1991 Medical College Admission Test Factor Structure.  

ERIC Educational Resources Information Center

A substantially revised Medical College Admission Test (MCAT) was introduced in spring 1991. The new examination is designed to assess critical thinking skills, basic concepts and problem solving facility in science, and writing skills. This paper reports preliminary findings on the factor structure of the revised MCAT, which consists of four

Li, Weichang; Mitchell, Karen J.

162

Preliminary Investigation of the Use of OTD Lightning Data to Better Understand Global Lightning Behavior  

Microsoft Academic Search

Lighting flash data from the Optical Transient Detector satellite for two seasonally opposite months were examined in a preliminary attempt to understand and characterize global lightning behavior. In particular, the study focused on events with extreme values of the satellite- observable physical parameters (duration, size, and energy) to identify and understand previously observed rare natural phenomena. The distributions of these

Daniel C. Stevenson; Earle R. Williams

1997-01-01

163

Identifying Predictors of Emotional Exhaustion among Special Education Paraeducators: A Preliminary Investigation  

ERIC Educational Resources Information Center

|The purpose of this preliminary study was to identify predictors of emotional exhaustion among special education paraeducators. A sample of 100 paraeducators in public and specialized alternative setting schools was used to determine whether self-reported levels of emotional exhaustion and other job-related factors were reported. Using

Shyman, Eric

2010-01-01

164

Preliminary investigations into the mechanical properties of a novel shock absorbing elastomeric composite  

Microsoft Academic Search

Impact absorbing pads, filled with an elastic fluid, consisting of numerous, small elastomeric capsules and a viscous matrix liquid are described. The capsules can take many forms, including beads of expanded foams, bubble packing and air filled, open ended tubes. The matrix liquid contributes lubrication, viscous damping and pressure equalisation properties. Preliminary experimental results relating to the impact absorbing and

W. A. Courtney; S. O. Oyadiji

2001-01-01

165

A Preliminary Qualitative Investigation of Group Processes in Group Supervision: Perspectives of Master's Level Practicum Students  

Microsoft Academic Search

Despite its wide use, group supervision remains a poorly understood component of counselor training programs. Using qualitative methods, this preliminary study attempted to add to the group supervision literature and develop hypotheses for further study. Four counselors in training enrolled in a practicum participated in the study. Participants were asked questions regarding their experiences in group supervision and provided examples

Jeremy M. Linton

2003-01-01

166

Preliminary investigation of interconnected systems interactions for the safety injection system of Indian Point3  

Microsoft Academic Search

The rich diversity of ideas and techniques for analyzing interconnected systems interaction has presented the NRC with the problem of identifying methods appropriate for their own review and audit. This report presents the findings of a preliminary study using the Digraph Matrix Analysis method to evaluate interconnected systems interactions for the safety injection system of Indian Point-3. The analysis effort

H. P. Alesso; D. A. Lappa; C. F. Smith; I. J. Sacks

1983-01-01

167

Adaptation Processes during the Implementation of an Information System: Preliminary Results from a Longitudinal Investigation.  

ERIC Educational Resources Information Center

|Describes preliminary results of a longitudinal study that examined implementation of an automated library system in a three-college consortium, focusing on technical services departments. Mutual adaptation research and factors affecting implementation are discussed. Findings on organizational issues, changes in work and workflow, role changes,

Lopata, Cynthia

1991-01-01

168

Parental Choice of Infant Feeding Behaviours in South West Sydney: A Preliminary Investigation  

ERIC Educational Resources Information Center

|Objective: The purpose of this study was to test a research instrument that could possibly be used for longitudinal research on infant feeding and to report on the preliminary results from the data collected. Design: Mixed methods approach--cross-sectional survey and qualitative research. Setting: Mother-infant dyads in South West Sydney,

Arora, A.; Gay, M.; Thirukumar, D.

2012-01-01

169

A Preliminary Investigation on Possible Role of Allelopathy in Saffron (Crocus sativus L.)  

Microsoft Academic Search

A preliminary experiment was conducted on possible role of allelopathy in saffron. Seven treatments composing of soil and corm extracts of saffron were applied on seed germination of wheat (cv. Omid). The statistical method used for data analysis was carried out on the basis of Completely Randomized Design. The results showed that effect of substances present in saffron corms was

M. Hosseini; S. J. H. Rizvi

170

Preliminary Design and Economic Investigations of Diffuser-Augmented Wind Turbines (DAWT). Executive Summary. Final Report.  

National Technical Information Service (NTIS)

A preferred design and configuration approach for the DAWT innovative wind energy conversion system is suggested. A preliminary economic assessment is made for limited production rates of units between 5 and 150 kW rated output. Nine point designs are use...

K. M. Foreman

1981-01-01

171

Model Fly Program. Part I. Theoretical Investigations and Preliminary Design Considerations.  

National Technical Information Service (NTIS)

A status report of the MODEL FLY program is presented. The report presents the results of the preliminary con siderations for development of the MODEL FLY testing technique. The MODEL FLY program objective is to develop a wind tunnel testing technique for...

J. A. Hill X. A. Gikas A. G. Fonda A. J. Gargani

1964-01-01

172

Preliminary Results of an Experimental Investigation of the Qu Superconducting Heat Pipe.  

National Technical Information Service (NTIS)

This note on preliminary results of our evaluation of the so-called Qu Tube is prompted in part by recent concerns expressed to the authors by some researchers regarding the performance characteristics of the superconducting, solid-state heat pipe as desc...

J. B. Blackmon S. F. Entrekin

2006-01-01

173

Investigation of the thermal expansion and heat capacity of the CaCu3Ti4O12 ceramics  

NASA Astrophysics Data System (ADS)

The thermal expansion of the CaCu3Ti4O12 ceramics has been measured over a wide temperature range 120-1200 K. The high quality of the samples under study has been confirmed by good agreement of the results of measurements of the heat capacity in the range 2-300 K and in the vicinity of the phase transition of magnetic nature at 25 K with the data for the single crystal. No anomalies in the thermal expansion that can be associated with the phase transition at 726-732 K assumed by other investigators have been found. The influence exerted on the thermal expansion by the heat treatment of the sample in a helium atmosphere and in air has been investigated.

Gorev, M. V.; Flerov, I. N.; Kartashev, A. V.; Guillemet-Fritsch, S.

2012-09-01

174

Preliminary investigation of an additive approach to the fabrication of precision aspheres  

SciTech Connect

We report progress in the aspherization of precision optical substrates via deposition of graded period Mo/Si multilayer coatings using a masking technique. These preliminary results show good agreement between the measured and desired thickness profiles over 85% of the sample, however, thickness deviations of up to 7 % are observed in the central area. The errors are attributed to misalignments of the mask relative to the substrate during deposition.

Weber, F.W.; Montcalm, C.; Vernon, S.P.; Kania, D.R.

1996-05-24

175

A preliminary investigation on MEMS based immunosensor for E. coli O157:H7 detection  

Microsoft Academic Search

Bio-recognition layers on sensors can be designed in various ways; however the most popular approach is to immobilise antibodies for specific capture of analytes also known as immunosensor. This paper presents a preliminary study on MEMS based immunosensor for detecting Escherichia coli 0157:H7. In this paper, the recent progress within biosensors for E. coli O157:H7 detection will be reviewed. We

M. H. Abu Bakar; M. H. Ibrahim; N. M. Kassim; A. B. Mohammad

2009-01-01

176

An Investigation of the Effect of Graphite Degradation on the Irreversible Capacity in Lithium-ion Cells  

SciTech Connect

The effect of surface structural damage on graphitic anodes, commonly observed in tested Li-ion cells, was investigated. Similar surface structural disorder was artificially induced in Mag-10 synthetic graphite anodes using argon-ion sputtering. Raman microscopy, scanning electron microscopy (SEM) and Brunauer Emmett Teller (BET) measurements confirmed that Ar-ion sputtered Mag-10 electrodes display similar degree of surface degradation as the anodes from tested Li-ion cells. Artificially modified Mag-10 anodes showed double the irreversible charge capacity during the first formation cycle, compared to fresh un-altered anodes. Impedance spectroscopy and Fourier transform infrared (FTIR) spectroscopy on surface modified graphite anodes indicated the formation of a thicker and slightly more resistive SEI layer. Gas chromatography/mass spectroscopy (GC/MS) analysis of solvent extracts from the electrodes detected the presence of new compounds with M{sub w} on the order of 1600 g mol{sup -1} for the surface modified electrode with no evidence of elevated M{sub w} species for the unmodified electrode. The structural disorder induced in the graphite during long-term cycling maybe responsible for the slow and continuous SEI layer reformation, and consequently, the loss of reversible capacity due to the shift of lithium inventory in cycled Li-ion cells.

Stevenson, Cynthia; Hardwick, Laurence J.; Marcinek, Marek; Beer, Leanne; Kerr, John B.; Kostecki, Robert

2008-03-03

177

Sorption of lead, copper, cadmium, zinc, and nickel by marine algal biomass: characterization of biosorptive capacity and investigation of mechanisms.  

PubMed

The marine algae Sargassum sp., Padina sp., Ulva sp., and Gracillaria sp., harvested locally, were investigated for their biosorption performance in the removal of lead, copper, cadmium, zinc, and nickel from dilute aqueous solutions. It was found that the biosorption capacities were significantly affected by solution pH, with higher pH favoring higher metal-ion removal. Kinetic and isotherm experiments were carried out at the optimal pH: at pH 5.0 for lead and copper, and at pH 5.5 for cadmium, zinc, and nickel. The metal removal rates were rapid, with 90% of the total adsorption taking place within 60 min. Sargassum sp. and Padina sp. showed the highest potential for the sorption of the metal ions, with the maximum uptake capacities ranging from 0.61 to 1.16 mmol/g for Sargassum sp. and 0.63 to 1.25 mmol/g for Padina sp. The general affinity sequence for Padina sp. was Pb>Cu>Cd>Zn>Ni, while that for Sargassum sp. was Pb>Zn>Cd>Cu>Ni. XPS and FTIR analysis of Sargassum sp. and Padina sp. revealed the chelating character of the ion coordination to carboxyl groups. It was confirmed that carboxyl, ether, alcoholic, and amino groups are responsible for the binding of the metal ions. PMID:15158390

Sheng, Ping Xin; Ting, Yen-Peng; Chen, J Paul; Hong, Liang

2004-07-01

178

Process-oriented investigation of the nitrate-removal-capacity of the aquifers in the Hessian Ried  

NASA Astrophysics Data System (ADS)

The quarternary sediments of the Hessian Ried, a part of the Rhine valley, hold an important groundwater resource for the densely populated Rhine-Main region in germany. Studies related to the implementation of the EU Water Framework Directive (WFD) have shown high nitrate concentrations in the groundwater, especially in the upper parts of the aquifers. Recently, there are signs which indicate that the nitrate-removal-capacity may be exhausted and the denitrification is slowing down. In aquifers, microbial autolitho- and heterotrophic denitrification is coupled to the consumption of the reactive phases pyrite (FeS2) and organic carbon (TOC), respectively. These reducing phases occur often only in trace amounts which makes it difficult to determine their distribution, reactivity and content in the field. However, a process-based knowledge of the occurring reactions and the quantification of the nitrate-removal-capacity and -kinetic is required to predict future nitrate fate. For this aim we combined different methods on a laboratory and field scale to identify the relevant nitrate degradation processes in the Hessian Ried. For determining the reactive phases (TOC and pyrite) in sediment samples, we modified and validated a combination of methods, ranging from sequential combustion for TOC and XRF for elemental and chromium reducible sulphur (CRS) for sulphide/disulphide determination. The analyses of core samples from different field sites in the Hessian Ried (forest and agricultural area) showed that especially the sediments under agricultural areas have much lower pyrite contents. Laboratory batch experiments with these sediment samples showed a much faster denitrification for sediments having higher sulphide content. ?34S isotope analyses of solid-phase sulphide and water-phase sulphate proved to be a good tool for determining the progress of the autolithotrophic denitrification. With in-situ multi-parameter measurements (Eh, pH, nitrate, temperature and conductivity) in several monitoring wells in combination with water analyses, especially sulphur-isotopic-ratios, we were able to identify high risk areas with a low nitrate-removal-capacity which is mainly caused by the consumption of the pyrite during the denitrification process. Furthermore, we are focusing on process-based investigations of denitrification using ?15N-isotopes and N2/Ar-measurements. The identified high risk areas allow intensifying the implementation of programs planed under the WFD in agricultural areas with low nitrate removal capacity.

Kludt, Christoph; Weber, Frank-Andreas; Bergmann, Axel; Knipp, Elena; Prei, Indriani; Schth, Christoph

2013-04-01

179

A preliminary investigation into the nature of shock absorbency in synthetic sports materials  

Microsoft Academic Search

Tests were conducted on three athletic shoe midsole materials and on three synthetic sports surfaces. All specimens were found to absorb energy when loaded. For a specific maximum load the amount of energy absorbed by each material was found to decrease as the load application rate increased. The materials exhibited different capacities to dissipate energy under the application of the

P. J. J. McCullagh; I. D. Graham

1985-01-01

180

A Conceptual Model of Coaching Efficacy: Preliminary Investigation and Instrument Development  

Microsoft Academic Search

The authors present a conceptual model of coaching efficacy and develop a reliable and valid instrument to measure the concept and to examine its hypothesized sources and outcomes. Coaching efficacy is defined as the extent to which coaches believe they have the capacity to affect the learning and performance of their athletes. Using high school coaches, confirmatory factor analysis supported

Deborah L. Feltz; Melissa A. Chase; Sandra E. Moritz; Phillip J. Sullivan

1999-01-01

181

Road-map to plan and structure the preliminary site investigation program for a geological repository in Japan  

SciTech Connect

Available in abstract form only. Full text of publication follows: A stepwise site selection process has been adopted for geological disposal of HLW in Japan. Literature surveys (LS), followed by preliminary investigations (PI) and, finally, detailed investigations (DI) in underground facilities will be carried out in the successive selection stages. In the PI stage, surface-based investigations such as borehole surveys and geophysical prospecting will be implemented with two main objectives. The first is to obtain information relating to legal requirements on siting, such as the occurrence of igneous or fault activity, and to confirm the extremely low likelihood of adverse impacts on the candidate site resulting from such phenomena. The second is to obtain the information required for the design and performance assessment of the engineered barrier system and the repository. In order to implement these preliminary investigations rigorously and efficiently within the constraints of a limited time period, budget and resources, PI planning before commencing investigations and on-site PI management during the investigation phase are very important issues. The planning and management of PI have to be performed by NUMO staff, but not all staff have sufficient experience in the range of disciplines involved. NUMO therefore decided to compile existing knowledge and experience in the planning and management of investigations in the form of manuals to be used to improve and maintain internal expertise. Experts with experience in overseas investigation programs were requested to prepare these manuals. This paper outlines the structure and scope of the upper level manual (road-map) and discusses NUMO's experience in applying it in 'dry-runs' to model sites. (authors)

Deguchi, Akira; Tsuchi, Hiroyuki; Kitayama, Kazumi [Nuclear Waste Management Organization of Japan (NUMO), Mita NN Bldg., 1-23, Shiba 4-Chome, Minato-ku, Tokyo 108-0014 (Japan); Chapman, Neil [ITC School of Underground Waste Storage and Disposal, Postfach, 3862 Innertkirchen (Switzerland); Andersson, Johan [JA Streamflow AB, Vinodlargatan 6, 117 59 Stockholm (Sweden); Tanaka, Tatsuya [Obayashi Corporation, SHinagawa InterCity B, 2-15-2, Konan, Minatoku, Tokyo, 108-8502 (Japan)

2007-07-01

182

75 FR 38079 - Postponement of Preliminary Determination of Antidumping Duty Investigation: Polyvinyl Alcohol...  

Federal Register 2010, 2011, 2012, 2013

...Antidumping Duty Investigation: Polyvinyl Alcohol From Taiwan AGENCY: Import...antidumping duty investigation on polyvinyl alcohol from Taiwan. See Initiation...Anti-Dumping Duty Investigation: Polyvinyl Alcohol From Taiwan, 69 FR...

2010-07-01

183

Preliminary investigation of changes in x-ray multilayer optics subjected to high radiation flux  

SciTech Connect

A variety of metal multilayers was exposed to high x-ray flux using Sandia National Laboratories' PROTO II machine in the gas puff mode. Fluxes incident on the multilayers above 700 MW/cm/sup 2/ in total radiation, in nominal 20 ns pulses, were realized. The neon hydrogen- and helium-like resonance lines were used to probe the x-ray reflectivity properties of the multilayers as they underwent change of state during the heating pulse. A fluorescer-fiber optic-streak camera system was used to monitor the changes in x-ray reflectivity as a function of time and irradiance. Preliminary results are presented for a W/C multilayer. Work in progress to model the experiment is discussed. 13 refs., 4 figs.

Hockaday, M.P.; Blake, R.L.; Grosso, J.S.; Selph, M.M.; Klein, M.M.; Matuska, W. Jr.; Palmer, M.A.; Liefeld, R.J.

1985-01-01

184

Human olfactory sensitivity for bourgeonal and male infertility: a preliminary investigation.  

PubMed

Olfactory receptor (OR) expression is also present in the sperm cells and could mediate sperm chemotaxis. OR1D2 was the first OR expressed in the testis demonstrated to be involved in chemotaxis and to be expressed also in the nose with a similar behavior. Bourgeonal is the OR1D2 most potent known agonist. Infertility affects ~15% of couples in western countries and sometimes it is unexplained. This pilot study compared the bourgeonal olfactory thresholds, the ability of sperm to sense the bourgeonal and the frequency of 13 single nucleotide polymorphisms (SNPs) of OR1D2 gene in nine males suffering of unexplained infertility with a control group of 15 healthy males. The mean olfactory threshold for bourgeonal was statistically different between the study group (10.53.7; median 12.3) and the control group (14.02.8; median 15.5) (p=0.006). Statistical analysis showed a significantly higher percentage of spermatozoa that migrated toward the capillaries filled with bourgeonal in the control group compared to the study group (p<0.0001). Sperm migration was equally inhibited in both groups of subjects when, together with bourgeonal, capillaries were filled with undecanal, a strong bourgeonal inhibitor (p=0.42). The 13 SNPs of OR1D2 revealed a statistically significant difference for allele and genotype frequency of rs769423 in study group versus control group (p=0.02). The present preliminary study seems to confirm the important role of OR1D2 both in nose and spermatozoa and may explain the idiopathic infertility of the study group. Further studies on larger series are mandatory to confirm our preliminary evidence. PMID:23525651

Ottaviano, G; Zuccarello, D; Menegazzo, M; Perilli, L; Marioni, G; Frigo, A C; Staffieri, A; Foresta, C

2013-03-24

185

A detailed X-ray investigation of ? Puppis. I. The dataset and some preliminary results  

NASA Astrophysics Data System (ADS)

Aims: One of the closest and brightest massive stars, ? Puppis, was the first early-type object observed by the current generation of X-ray observatories. These observations provided some surprising results, partly confirming the theoretical predictions while simultaneously unveiling some problematic mismatches with expectations. In this series of papers, we perform a thorough study of ? Puppis in X-rays, using a decade of XMM-Newton observations. Methods: The star ? Puppis was observed 18 times by XMM-Newton, totaling 1 Ms in exposure. This provides the highest quality high-resolution X-ray spectrum of a massive star to date, as well as a perfect dataset for studying X-ray variability in an "archetype" object. Results: This first paper reports on the data reduction of this unique dataset and provides a few preliminary results. On the one hand, analysis of EPIC low-resolution spectra shows the star to have a remarkably stable X-ray emission from one observation to the next. On the other hand, fitting by a wind model of individual line profiles recorded by RGS confirms the wavelength dependence of the line morphology. Based on observations collected with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member States and the USA (NASA).Table 1 is available in electronic form at http://www.aanda.org

Naz, Y.; Flores, C. A.; Rauw, G.

2012-02-01

186

Synthesis, Characterization, and Preliminary Investigation of Cell Interaction of Magnetic Nanoparticles with Catechol-Containing Shells  

SciTech Connect

Superparamagnetic iron oxide cores were synthesized by co-precipitation of Fe(II) and Fe(III) salts and subsequently stabilized by coating with different catechols (levodopa, dopamine, hydrocaffeic acid, dopamine-containing carboxymethyl dextran) known to act as high-affinity, bidentate ligands for Fe(III). The prepared stable magnetic fluids were characterized with regard to their chemical composition (content of iron and shell material, Fe(II)/Fe(III) ratio) and their physical properties (size, surface charge, magnetic parameters). The nanoparticles showed no or only slight cytotoxic effects within 1 and 4 days of incubation with 3T3 fibroblast cells. Preliminary experiments were performed to study the interaction of the prepared nanoparticles with human MCF-7 breast cancer cells and leukocytes. An intense interaction of the MCF-7 cells with these particles was found whereas the leukocytes showed a lower tendency of interaction. Based on these finding, the novel magnetic nanoparticles possess the potential for use in depletion of tumor cells from peripheral blood.

Wagner, Kerstin; Seemann, Thomas; Wyrwa, Ralf; Schnabelrauch, Matthias [Biomaterials Department, INNOVENT e. V., Pruessingstrasse 27 B, D-07745 Jena (Germany); Clement, Joachim H. [Department of Internal Medicine II, University Hospital Jena, Erlanger Allee 101, D-07740 Jena (Germany); Mueller, Robert [Institute of Photonic Technology, Albert-Einstein-Strasse 9, D-07745 Jena (Germany); Nietzsche, Sandor [Center for Electron Microscopy, University Hospital Jena, Ziegelmuehlenweg 1, D-07743 Jena (Germany)

2010-12-02

187

Preliminary investigation of the feasibility of magnetic propulsion for future microdevices in blood vessels.  

PubMed

The Magnetic Resonance Submarine (MR-Sub) project is a first attempt to validate a new propulsion method for future small magnetically controlled microdevices suited for minimally invasive applications in blood vessels. A Magnetic Resonance Imaging (MRI) system provides the driving force in three dimensions to a ferromagnetic core that could be embedded onto a specialised microdevice. The paper describes preliminary tests made to match the magnetic force induced by an MRI system on a ferromagnetic sphere with the drag force it encompasses in a cylindrical tube. These tests provide a proof of concept demonstrating that this new method of propulsion is very promising within the constraints of such types of operations. This conclusion is based on specific measurements showing that 1010/1020 carbon steel spheres (3.175 mm and 2.381 mm in diameter) can withstand a maximum flow of 0.370 +/- 0.0064 l/min (19.5 cm/s) and 0.311 +/- 0.01209 l/min (16.4 cm/s) respectively when placed inside a 6.35 mm diameter PMMA tube and subjected to a 18 mT/m magnetic field gradient. PMID:16179757

Mathieu, Jean-Baptiste; Martel, Sylvain; Yahia, L'Hocine; Soulez, Gilles; Beaudoin, Gilles

2005-01-01

188

Investigation of lapses of consciousness using a tracking task: preliminary results.  

PubMed

In many high-risk occupations, it is critical that a person remains alert at all times. There is much to be gained by being able to monitor a person on-line and detect lapses of consciousness (LoC) so that remedial action can be taken (e.g., a rest break) to ensure that safety is maintained. In this study, 15 normal subjects were observed on two sessions while they performed a continuous tracking task for a period of 1 hour. EEG, eye movements, tracking performance data and a video of the subject were recorded during the session. This work presents some preliminary results on the phenomenon of lapsing. Only 4 of the 15 subjects did not have a LoC at some stage. Seven subjects had LoCs more than 45 times and 4 more than 100 times during the 2 hours. The mean rate of lapsing over all subjects was 29.1 LoC/h. In contrast, lapses in performance were caused by both lapses of consciousness (30.1%) and attention (69.9%). There was no correlation found between age of subject and number of lapses of consciousness. PMID:17271363

R Peiris, Malik; Jones, Richard; Carroll, Grant; Bones, Philip

2004-01-01

189

High blood and urine levels of cadmium in phosphate workers: A preliminary investigation  

SciTech Connect

A preliminary study is described in which blood and urine levels of cadmium are determined in phosphate fertilizer workers exposed to phosphate dust. Control samples were taken from non-smokers who did not eat oysters regularly and who had eaten none for at least four weeks prior to the study. A cross section of phosphate workers was sampled. Various blends of phosphate fertilizers were analyzed. Analysis was by graphite furnace atomic absorption spectrometry. Results show that levels in fertilizers ranged from 42-147 ppm. The mean whole blood level of phosphate workers was 7.21 + or - 2.05 ng/ml and 0.92 + or - 0.18 ng/ml in controls. The mean urine level of phosphate workers was 5.24 + or - 0.53 ng/ml compared to 0.54 + or - 0.20 ng/ml for controls. No immediate symptoms of acute or subacute cadmium intoxication were observed but high levels indicate a need for studies to elucidate any long-term effects of exposure to cadmium-containing phosphate dust. 3 tables (JMT)

Sharma, R.P.

1981-12-01

190

Preliminary investigation of the impulsive and neuroanatomical characteristics of compulsive sexual behavior  

PubMed Central

In recent years there has been increased attention in a clinical syndrome characterized by excessive sexual thoughts, sexual urges, and/or sexual behaviors that has many aspects in common with impulse control disorders. This study provides a preliminary examination of the impulsive aspects of this syndrome, Compulsive Sexual Behavior (CSB), as conceptualized by Coleman and colleagues. Sixteen male subjects, 8 CSB patients and 8 non-patient controls, completed psychometric measures of impulsivity and compulsive sexual behavior, a behavioral task designed to assess impulse control (go/no-go task), and underwent diffusion tensor imaging (DTI) procedures. The results indicated that CSB patients were significantly more impulsive; whether measured by psychometric testing or the go/no-go procedure than controls. The results also indicate that CSB patients showed significantly higher superior frontal region mean diffusivity (MD) than controls. A correlational analysis indicated significant associations between impulsivity measures and inferior frontal region fractional anisotrophy (FA) and MD, but no associations with superior frontal region measures. Similar analyses indicated a significant negative association between superior frontal lobe MD and the compulsive sexual behavior inventory. Thus, while CSB patients were more impulsive than controls, the DTI results were not consistent with impulse control disorders.

Miner, Michael H.; Raymond, Nancy; Mueller, Bryon A.; Lloyd, Martin; Lim, Kelvin O.

2009-01-01

191

Multisource geophysical investigation of the Acigl caldera structure (central Turkey): preliminary results  

NASA Astrophysics Data System (ADS)

Neogene and Quaternary volcanic activity formed the large volume ignimbritic units (about 10 different units, namely Cappadocian ignimbritic field) around Nev?ehir, Derinkuyu and Ac?gl districts. These large volume ignimbrites are mostly caldera-related products but the calderas are partially or totally buried by later pyroclastic and sedimentary cover. Source estimations for the caldera-related pyroclastics in Nev?ehir plateau indicate that the calderas concentrate around Derinkuyu and Ac?gl plains. Geophysical methods (resistivity imaging, self-potential, TDEM and magnetic surveys) were applied around Ac?gl plain and Mt. Erda? to reveal out the near-surface structural elements related to the Ac?gl caldera system. Additionally, remote sensing coupled with morphology was used. Preliminary results show that the Ac?gl caldera complex may have an elongated shape. Possible structural models for the caldera system/complex are explained. Future geophysical studies and a detailed study of the geological relationship between the caldera-related products are necessary to better understand the Ac?gl caldera system.

Ulusoy, I.; Labazuy, P.; Aydar, E.; Atak, O.; Yrr, T.; Artuner, H.; Dahlin, T.

2009-04-01

192

Preliminary design and economic investigations of Diffuser-Augmented Wind Turbines (DAWT)  

SciTech Connect

A preferred design and configuration approach is suggested for the DAWT innovative wind energy conversion system. A preliminary economic asessment is made for limited production rates of units between 5 and 150 kw rated output. Nine point designs are used to arrive at the conclusions regarding best construction material for the diffuser and busbar cost of electricity (COE). It is estimated that for farm and REA cooperative end users, the COE can range between 2 and 3.5 cents/kWh for sites with annual average wind speeds of 16 and 12 mph (25.7 and 19.3 km/h) respectively, and 150 kW rated units. No tax credits are included in these COE figures. For commercial end users of these 150 kW units the COE ranges between 4.0 and 6.5 cents/kWh for 16 and 12 mph sites. These estimates in 1979 dollars are lower than DOE goals set in 1978 for the rating size and end applications. Recommendations are made for future activities to maintain steady, systematic progress toward mature development of the DAWT.

Foreman, K.M.

1981-12-01

193

A preliminary investigation for an Al/AlCl3-NaCl/FeS2 secondary cell  

NASA Astrophysics Data System (ADS)

The development of an Al/AlCl3-NaCl/FeS2 cell as a potential candidate for advanced secondary cells is investigated, considering that aluminum has a negative potential and a high theoretical capacity, and the system has a low melting point and is stable as molten salt not in the presence of air or moisture. Discharge curves at various temperatures showed a high plateau at about 0.9 V and a low plateau at about 0.6 V; it was also shown that the more the current density increased, the greater was the high plateau capacity. In addition, FeS was detected from the FeS2 electrode discharged up to 0.65 V, and Al2S3 was detected up to 0.20 V by X-ray analysis.

Koura, N.

1980-07-01

194

Alu Insertions and Genetic Diversity: A Preliminary Investigation by an Undergraduate Bioinformatics Class  

ERIC Educational Resources Information Center

"Alu"-insertion polymorphisms were used by an undergraduate Bioinformatics class to study how these insertion sites could be the basis for an investigation in human population genetics. Based on the students' investigation, both allele and genotype "Alu" frequencies were determined for African-American and Japanese populations as well as a

Elwess, Nancy L.; Duprey, Stephen L.; Harney, Lindesay A.; Langman, Jessie E.; Marino, Tara C.; Martinez, Carolina; McKeon, Lauren L.; Moss, Chantel I. E.; Myrie, Sasha S.; Taylor, Luke Ryan

2008-01-01

195

Life Stress and Adherence to Antiretroviral Therapy among HIV-Positive Individuals: A Preliminary Investigation  

Microsoft Academic Search

The present study sought to investigate the impact of life stress on treatment adherence and viral load of HIV-positive individuals. Three different aspects of life stress were examined in this investigation (perceived stress, acute life events unrelated to the HIV illness, and HIV- related acute life events). Furthermore, we examined whether these relationships were mod- erated by depressive severity, self-esteem,

Kathryn A. Bottonari; John E. Roberts; Jeffrey A. Ciesla; Ross G. Hewitt

2005-01-01

196

A preliminary investigation of early smoking initiation and nicotine dependence in Korean adults  

Microsoft Academic Search

Background: Few studies have investigated the association between age at smoking initiation and Fagerstrm test for nicotine dependence (FTND) in adulthood. The goal of this study was to develop the Korean version of FTND (FTND-K) and to examine the relationship between age at smoking initiation and nicotine dependence. Methods: This investigation used data from 268 current smokers who visited the

Sang Min Park; Ki Young Son; Young Joon Lee; Hee-Choon S. Lee; Ji Ho Kang; Yeon Ji Lee; Yoon Jung Chang; Young Ho Yun

2004-01-01

197

Paleoseismic investigations of the Paintbrush Canyon fault in southern Midway Valley, Yucca Mountain, Nevada: Preliminary results  

SciTech Connect

Trench mapping in southern Midway Valley provides evidence of multiple surface-faulting events on a western splay of the Paintbrush Canyon fault during the middle to late Pleistocene. The 6-m-wide fault zone exposed in the trench strikes N30-45E and dips steeply ([approximately]78[degree]) to the west, although some shears within the zone dip to the east. Tertiary volcanic bedrock is exposed only on the footwall block within the trench. Unconsolidated colluvial and eolian deposits are present in the hanging-wall block and above bedrock in the footwall block. These deposits tentatively are assigned, respectively, mid Pleistocene and late Pleistocene ages based on correlations with surficial map units in Midway Valley. Three to five displacement events are inferred based on faulted colluvial and eolian deposits, and scarp-derived colluvial wedges. Total cumulative dip-slip displacement of the oldest middle Pleistocene subunit is estimated to be about 170 to 270 cm. The dip-slip displacement associated with the youngest event is about 15 cm. The earlier displacements are estimated to have produced between 40 and 85 cm of dip-slip displacement per event. The most recent event occurred after deposition of late Pleistocene colluvium deposited against the fault scarp but before deposition of an overlying hillslope-derived colluvium of probable late pleistocene age. Based on the preliminary results of the authors study, the middle to late Quaternary rate of dip-slip displacement is approximately 0.01 m/kyr or less. Ongoing work, including soil-stratigraphic studies and numerical dating of deposits, should better constrain the timing and a rate of faulting along this western splay of the Paintbrush Canyon fault.

Swan, F.H.; Wesling, J.R.; Thomas, A.P. (Geomatrix Consultants, San Francisco, CA (United States))

1993-04-01

198

Preliminary investigations of bony fish--tench (Tinca tinca L.)--erythrocyte insulin receptors.  

PubMed

Specific insulin receptors were identified on tench (Tinca tinca L.) erythrocytes. The samples of blood from 3-4 fish per experiment were pooled in summer. Erythrocytes were washed twice with saline solution, then centrifuged and resuspended in the assay buffer. Incubations were carried out in 0.5 ml samples containing 10(9) cells, with addition of 0.03 nmol/l of 125I-pork insulin in the absence or presence of unlabelled pork or salmon insulin (0.05-2000 nmol/l) for 24 h at 4 degrees C. Calculated from seven experiments specific binding of 125I-insulin was 6.2 +/- 0.2% (mean +/- SD). Scatchard analysis of the binding data from insulin radioreceptor assay showed two different binding sites with high (HAIR) and low (LAIR) affinity. KD values were 0.82 +/- 0.17 nmol/l and 2.05 +/- 1.62 mumol/l, and maximal binding capacity (Bmax) 24.9 +/- 1.6 fmol/10(9) cells and 17.5 +/- 12.2 pmol/10(9) cells, respectively (N = 4). If compared with pork insulin, six to seven times more of salmon insulin was required to displace 50% of iodine labelled hormone. Thus, insulin receptors of tench erythrocytes are similar to those described in other species of fish and other lower vertebrates. PMID:8262459

Nowak, K W; Mackowiak, P

1993-10-01

199

Radio science investigations of the saturn system with voyager 1: preliminary results.  

PubMed

Voyager 1 radio occultation measurements of Titan's equatorial atmosphere successfully probed to the surface, which is provisionally placed at a radius of 2570 kilometers. Derived scale heights plus other experimental and theoretical results indicate that molecular nitrogen is the predominant atmospheric constituent. The surface pressure and temperature appear to be about 1.6 bars and 93 K, respectively. The main clouds are probably methane ice, although some condensation of nitrogen cannot be ruled out. Solar abundance arguments suggest and the measurements allow large quantities of surface methane near its triple-point temperature, so that the three phases of methane could play roles in the atmosphere and on the surface of Titan similar to those of water on Earth. Radio occultation measurements of Saturn's atmosphere near 75 degrees south latitude reached a maximum pressure of 1.4 bars, where the temperature is about 156 K. The minimum temperature is about 91 K near the 60-millibar pressure level. The measured part of the polar ionosphere of Saturn has a peak electron concentration of 2.3 x 10(4) per cubic centimeter at an altitude of 2500 kilometers above the 1-bar level in the atmosphere, and a plasma scale height at the top of the ionosphere of 560 kilometers. Attenuation of monochromatic radiation at a wavelength of 3.6 centimeters propagating obliquely through Saturn's rings is consistent with traditional values for the normal optical depth of the rings, but the near-forward scattering of this radiation by the rings indicates effective scattering particles with larger than expected diameters of 10, 8, and 2 meters in the A ring, the outer Cassini division, and the C ring, respectively. Preliminary analysis of the radio tracking data yields new values for the masses of Rhea and Titan of 4.4 +/- 0.3 x 10(-6) and 236.64 +/- 0.08 x 10(-6) times the mass of Saturn. Corresponding values for the mean densities of these objects are 1.33 +/- 0.10 and about 1.89 grams per cubic centimeter. The density of Rhea is consistent with a solar-composition mix of anhydrous rock and volatiles, while Titan is apparently enriched in silicates relative to the solar composition. PMID:17783830

Tyler, G L; Eshleman, V R; Anderson, J D; Levy, G S; Lindal, G F; Wood, G E; Croft, T A

1981-04-10

200

Kinetics investigation of oxygen storage capacity in La2O3-CeO2 solid solution.  

PubMed

La2O3-CeO2 nanopowders with different La2O3 (0-20 mol%) were prepared by the sol-gel method. The modification of the cubic structure of ceria by substituting La3+ for Ce4+ into the lattice of CeO2 has been investigated. The crystal structure of La2O3-CeO2 nanomaterials has been examined by X-ray powder diffraction and analyzed by the Rietveld refinement method. The introduction of La3+ enlarges the octahedral void of unit cell in the cubic CeO2, which favors the oxygen migration in the crystal lattice. Raman characterization results show that the wavenumber of the La2O3-CeO2 solid solution shifted to red and the oxygen vacancy increased with lanthana content in Ce(1-x)La(x)O(2-x/2). The oxygen vacancy, generated by La3+ substituting for Ce4+, could supply more channels for oxygen migration through the lattice. The changes of lattice structure and the oxygen vacancy with La2O3 are correspondence with the results of oxygen storage capacity (OSC) measurement, which indicate that the changes of macro-performance are connected with the microstructure deformation of La2O3-CeO2. The kinetics of Ce0.9La0.2O1.9 nanomaterials with the highest OSC value was studied and the apparent activation energy (E(a)) of reduction and oxidation process was calculated to be 5.6 and 6.0 kJ/mol, respectively. The low E(a) value might be one of the reasons for Ce0.8La0.2O1.9 nanomaterials with the high OSC value. PMID:21449363

Liu, Lili; Wang, Xidong; Guo, Min; Zhang, Mei

2011-03-01

201

Does Tibetan lower crust flow? Preliminary constraints from a reconnaissance investigation of lacustrine shorelines around Siling Co, Tibet  

NASA Astrophysics Data System (ADS)

Although rheology of crust and lithosphere is central to all models of lithospheric deformation during orogenesis, recent propositions that lateral flow of weak mid-to-lower crust is an active participant in the growth and evolution of the Tibetan Plateau demand close scrutiny of whether the appropriate conditions exist for such behavior. Unfortunately, determining crustal rheology from geologic and geophysical investigations remains challenging, and many lines of evidence are equivocal. One of the most definitive approaches to this problem exploits the flexural/isostatic response to changes in surface loads, often lacustrine in origin [Gilbert, 1890]. Here we present the results of a reconnaissance expedition to Siling Co, in east-central Tibet. With a present-day area of > 1800 km2, Siling Co is the second-largest lake in Tibet, and the presence of high shorelines assumed to have formed during glacial lake highstands afford the opportunity to investigate deformation associated with isostatic adjustment to changes in lake levels. Shoreline features around Siling Co are remarkably well-preserved and consist of both erosional (wave-cut cliffs, notches) and constructional (beach ridges, spits, tombolos). The highest of these stands approximately 50m above the lake. Surveys of this shoreline, correlated by landscape position and geomorphic character, appear to be consistent with slight (several meter), but systematic, increases in elevation toward the center of the former lake. These results are preliminary, as they depend on correlations among undated shorelines. Early results from U-Th chronology of lacustrine tufas indicate the presence of a Stage 6 lake, but may not directly constrain the age of the shoreline. Future work with cosmogenic isotopes will allow us to both test shoreline correlations and also place age constraints on the timing of lake level fall . Our preliminary analysis indicates that length scales and the inferred magnitudes of shoreline deflection are appropriate to distinguish between models of middle/lower crustal flow or upper mantle (asthenospheric) flow in central Tibet.

Shi, X.; Kirby, E.; Furlong, K.; Wang, E.; Asmerom, Y.; Polyak, V.

2007-12-01

202

Relationships between Tattling, Likeability, and Social Classification: A Preliminary Investigation of Adolescents in Residential Care  

ERIC Educational Resources Information Center

Little research has been published on tattling, even less on its social impact, and we found none directly investigating tattling by adolescents. This study assessed the extent to which tattling, as perceived by peers and caregivers of adolescents in a residential care program, was associated with various dimensions of social status and other

Friman, Patrick C.; Woods, Douglas W.; Freeman, Kurt A.; Gilman, Rich; Short, Mary; McGrath, Ann M.; Handwerk, Michael L.

2004-01-01

203

A Preliminary Investigation of Acceptance and Commitment Therapy as a Treatment for Marijuana Dependence in Adults  

ERIC Educational Resources Information Center

|In this investigation, 3 adults who met criteria for marijuana dependence were treated using an abbreviated version of acceptance and commitment therapy (ACT). The treatment was delivered in eight weekly 90-min individual sessions. The effects of the intervention were assessed using a nonconcurrent multiple baseline across participants design.

Twohig, Michael P.; Shoenberger, Deacon; Hayes, Steven C.

2007-01-01

204

Joint magnetotelluric and seismic investigation of the Cascadia subduction zone structure: Preliminary results and outlook  

Microsoft Academic Search

Using magnetotelluric data from EARTHSCOPE and EMSLAB, and passive seismic data from CAF and EARTHSCOPE, we investigate the substructure of the Cascadia subduction zone. Through a series of two dimensional magnetotelluric inversions and migrated seismic sections, we explore some of the constraints to slab geometry, volatile release, and melting within the subduction zone structure. We consider what each geophysical method

R. S. McGary; R. L. Evans; S. Rondenay; G. A. Abers; K. C. Creager; P. E. Wannamaker

2009-01-01

205

Impact of Chromosome 4p- Syndrome on Communication and Expressive Language Skills: A Preliminary Investigation  

ERIC Educational Resources Information Center

|Purpose: The purpose of this investigation was to examine the impact of Chromosome 4p- syndrome on the communication and expressive language phenotype of a large cross-cultural population of children, adolescents, and adults. Method: A large-scale survey study was conducted and a descriptive research design was used to analyze quantitative and

Marshall, Althea T.

2010-01-01

206

A preliminary investigation of the relationship between induced rumination and state body image dissatisfaction and anxiety  

Microsoft Academic Search

The current study investigated the relationship between cognitive rumination and state body image distress using an experimental design. Specifically, the study examined whether participants induced to ruminate about an imagined negative body image event would report more body image dissatisfaction and anxiety compared to those induced to distract themselves. Ninety-nine undergraduate women completed two measures to assess depressive symptomology and

Sarah F. Etu; James J. Gray

2010-01-01

207

A Preliminary Qualitative Investigation of Voice Hearing and Its Association with Dissociation in Chronic PTSD  

Microsoft Academic Search

Following on from a quantitative study, this research used a qualitative methodology to investigate the lived experience of 3 men with chronic posttraumatic stress disorder associated with the conflict in Northern Ireland who reported auditory hallucinations. Data analysis used the Framework method. Results showed that beliefs about voices, dissociation of identity and body, and interpersonal impact were central superordinate themes

Caroline Anketell; Martin J. Dorahy; David Curran

2010-01-01

208

Relationships Between Tattling, Likeability, and Social ClassificationA Preliminary Investigation of Adolescents in Residential Care  

Microsoft Academic Search

Little research has been published on tattling, even less on its social impact, and we found none directly investigating tattling by adolescents. This study assessed the extent to which tattling, as perceived by peers and caregivers of adolescents in a residential care program, was associated with various dimensions of social status and other behavioral correlates. Eighty-eight adolescent participants rated their

Patrick C. Friman; Douglas W. Woods; Kurt A. Freeman; Rich Gilman; Mary Short; Ann M. McGrath; Michael L. Handwerk

2004-01-01

209

Ethical Reasoning Used by Teachers of Children with Severe and Profound Intellectual Disabilities: A Preliminary Investigation.  

ERIC Educational Resources Information Center

|A study investigated the ethical reasoning of five Canadian teachers of children with severe and profound intellectual disabilities in segregated classrooms. Findings indicated that teachers gave almost exclusive consideration to individual student interests in their discussion of four ethical dilemmas. The governing principle in their argument

Bredberg, Elizabeth; Davidson, Iain F. W. K.

1999-01-01

210

A Preliminary Investigation of Stimulus Control Training for Worry: Effects on Anxiety and Insomnia  

ERIC Educational Resources Information Center

|For individuals with generalized anxiety disorder, worry becomes associated with numerous aspects of life (e.g., time of day, specific stimuli, environmental cues) and is thus under poor discriminative stimulus control (SC). In addition, excessive worry is associated with anxiety, depressed mood, and sleep difficulties. This investigation sought

McGowan, Sarah Kate; Behar, Evelyn

2013-01-01

211

PRELIMINARY INVESTIGATION OF SUBMERGED AQUATIC VEGETATION MAPPING USING HYPERSPECTRAL REMOTE SENSING  

EPA Science Inventory

The use of airborne hyperspectral remote sensing imagery for automated mapping of submersed aquatic vegetation in the tidal Potomac River was investigated for near to real-time resource assessment and monitoring. Airborne hyperspectral imagery, together with in-situ spectral refl...

212

Integrating Children with Special Needs: Singapore Preschool Teachers Share Their Feelings--A Preliminary Investigation  

ERIC Educational Resources Information Center

There has been a marked change in the Singapore Educational System where general and special education schools will receive extra funding for special needs children. While this financial support is encouraging, it is uncertain if preschool teachers and their respective kindergartens are ready for integration. This study investigated how teachers

Nonis, Karen P.

2006-01-01

213

A Preliminary Investigation of Business Opportunities on the Internet in Asia Pacific  

Microsoft Academic Search

Abstract As an increasing number of firms have started to use the Internet to conduct their business, we need to gain ,a better insight into the effects of computer ,mediated commerce ,on various activities of a firms value chain. In a multifaceted survey of 80 Asian Pacific companies,we investigated 1) the way the use of the Internet is affecting different

Morris Kwok Wai-pun; Ali F. Farhoomand; Virpi Kristiina Tuunainen

214

Preliminary investigation of the use of air injection to mitigate cavitation erosion  

Microsoft Academic Search

This project was initiated as part of a new research and development focus to improve hydropower generation. One aspect of the problem is severe cavitation erosion which is experienced when hydroturbines are operated at best power or in spinning reserve. Air injection has been used successfully to minimize or eliminate cavitation erosion in other applications. Thus, an investigation was initiated

R. E. A. Arndt; C. R. Ellis; S. Paul

1995-01-01

215

A preliminary investigation of chitosan film as dressing for punch biopsy wounds in rats  

Microsoft Academic Search

Purpose. To investigate the wound healing effi- cacy of two chitosan films, Chit-AA and Chit-LA, in com- parison with a commercial preparation, Omiderm, using punch biopsy wounds in rats. Methods. The punch biopsy wounds were created in the abdominal region of male Wistar rats. The films were evaluated in terms of transpar- ency, flexibility, adherence property, ease of removal from

Tanveer Ahmad Khan; Kok Khiang Peh

216

Paleontologic investigations at Big Bone Lick State Park, Kentucky: A preliminary report  

USGS Publications Warehouse

The Big Bone Lick area in Kentucky, the first widely known collecting locality for vertebrate fossils in North America, is being investigated for further faunal and geologic evidence. Mammal bones, ranging in age from Wisconsin (Tazewell?) to Recent, were recovered in 1962 from four different faunal zones in two terrace fills.

Schultz, C. B.; Tanner, L. G.; Whitmore, Jr. , F. C.; Ray, L. L.; Crawford, E. C.

1963-01-01

217

Failure of Prospective Memory after Acquired Brain Damage: Preliminary Investigation and Suggestions for Future Directions  

Microsoft Academic Search

This paper investigates the premise that the greater frequency of errors after acquired brain damage will facilitate identification of essential components of successful prospective memory. It examines performance by patients with recent acquired non-progressive brain damage and age-matched control subjects on two experimental measures of prospective memory. A significant difference between patients and control subjects arises mainly from performance on

Janet Cockburn

1996-01-01

218

Surface hardening of AISI 4340 steel by machining: a preliminary investigation  

Microsoft Academic Search

An attempt has been made to investigate feasibility of applying machining, a material removal process, to surface harden steel parts. The idea is to utilize transient thermomechanical loading induced during machining to purposely generate a hardened layer while simultaneously removing excess materials. This approach, if capable, will be a cost-effective alternative to conventional surface hardening, giving possible benefits such as

Y. Kevin Chou

2002-01-01

219

Preliminary investigation of a sealed, remotely activated silver-zinc battery  

Microsoft Academic Search

Methods necessary to provide a remotely activated, silver zinc battery capable of an extended activated stand while in a sealed condition were investigated. These requirements were to be accomplished in a battery package demonstrating an energy density of at least 35 watt hours per pound. Several methods of gas suppression were considered in view of the primary nature of this

C. G. Wheat

1977-01-01

220

Using data mining to investigate cognitive processes by a creativity test-a preliminary study  

Microsoft Academic Search

This article presents a novel researched method for investigating the cognitive processes of children. This study designed an activity to observe characteristics of cognitive process. In the activity, children were asked to engage in thinking and using scientific concept to draw as many as possible optical paths between the laser gun and target. There were 95 fifth graders participate in

Yu-Ling Lu; Yuan-Chang Wu; Wei-Ming Chen; Yu-Cheng Lien; Chi-Jui Lien

2010-01-01

221

A Preliminary Investigation of Phonological Encoding Skills in Children Who Stutter  

ERIC Educational Resources Information Center

Purpose: The present study investigated phonological encoding skills in children who stutter (CWS) and those who do not (CNS). Participants were 9 CWS (M=11.8 years, SD=1.5) and 9 age and sex matched CNS (M=11.8 years, SD=1.5). Method: Participants monitored target phonemes located at syllable onsets and offsets of bisyllabic words. Performance in

Sasisekaran, Jayanthi; Brady, Alison; Stein, Jillian

2013-01-01

222

SMS-based library catalogue system: a preliminary investigation of user acceptance  

Microsoft Academic Search

Purpose The purpose of this paper is to investigate potential users' cognitive beliefs and intention to use (IU) a proposed short message service (SMS)-based library catalogue system. The motivation for this research is the growing popularity of mobile information systems and the need to explore if SMS is a technology that libraries could tap into to enhance their services

Tiong T. Goh; Chern Li Liew

2009-01-01

223

A Preliminary Study Investigating the Mere Exposure Effect Using Divided and Full Attention Conditions  

Microsoft Academic Search

There has been considerable concern exposed by marketers and advertisers about the effectiveness of different forms of message presentation. This, in turn has fuelled an on-going debate about the most efficient means of measuring advertising effectiveness. Two experiments were conducted with undergraduate and postgraduate students to investigate the application of mere exposure to marketing practice. Results indicate support for the

Kerryn Jackson; Mark Gabbott

1999-01-01

224

Preliminary Geophysical Investigations of the Ship Rock Diatreme, Navajo Nation, New Mexico  

Microsoft Academic Search

Magnetic and gravity data were collected at the Ship Rock minette neck and dikes, part of the Navajo volcanic field in the central Colorado Plateau, to investigate their subsurface structure. The deep root system of Ship Rock, an exhumed Oligocene maar-diatreme complex, has not been resolved. The diatreme is largely composed of minette tuff-breccia with a large wallrock fraction, whereas

E. M. Gruen; L. McCarthy; G. Namingha; C. Bank; J. Noblett; S. Semken

2003-01-01

225

Manganese Sulfate from the People's Republic of China. Investigation No. 731-TA-725 (Preliminary).  

National Technical Information Service (NTIS)

On the basis of the record developed in the subject investigation, the Commission unanimously determines, pursuant to section 733(a) of the Tariff Act of 1930 (19 U.S.C. section 1673b(a)), that there is a reasonable indication that an industry in the Unit...

1995-01-01

226

A preliminary investigation of the variation of vitamin B12 in oceanic and coastal waters  

Microsoft Academic Search

The presence in the sea of vitamin Bm or of its analogues, has been found necessary for the growth of several species of unicellular plants (e.g. Provasoli & Pintner, 1953; Droop, 1954, 1955). Bioassaysof the quantities in inshore waters during winter have been made by Lewin (1954)and by Droop (1954).The present investigation, carried out in 1955,wasdesigned to extend this study

C. B. Cowey

1956-01-01

227

Attitudes to Poverty, the Protestant Ethic, and Political Affiliation: A Preliminary Investigation.  

ERIC Educational Resources Information Center

|Investigated British attitudes toward the poor as measured by MacDonald's Povery Scale and the Protestant Ethic Scale. Supporters of the British Conservative Party had more negative attitudes toward the poor, and were more likely to blame the poor for their fate than supporters of the British Labour Party. (JAC)|

Wagstaff, Graham F.

1983-01-01

228

Preliminary optical coherence tomography investigation of the temporo-mandibular joint disc  

Microsoft Academic Search

Aim and objectives. The morphology and position of the temporo-mandibular disc are key issues in the diagnosis and treatment of arthrogenous temporo-mandibular disorders. Magnetic resonance imaging and arthroscopy are used today to identify: flattening of the pars posterior of the disc, perforation and\\/or adhesions in the pars intermedia of the disc and disc displacements. The present study proposes the investigation

Corina Marcauteanu; Enik Demjan; Cosmin Sinescu; Meda Negrutiu; Adrian Motoc; Rodica Lighezan; Liliana Vasile; Mike Hughes; Adrian Bradu; George Dobre; Adrian G. Podoleanu

2010-01-01

229

Preliminary Investigation by Raman Spectroscopy of Some Polymeric Matrix with Pharmaceutical Applications  

NASA Astrophysics Data System (ADS)

The possibility to use poly(ethylene oxide) as a polymeric matrix for some pharmaceutical products was analyzed. The behavior of the polymer in the aqueous solutions and the possible interactions between the polymer and the clotrimazole were investigated by Raman spectroscopy. Repeated action of the water on the polymeric conformation is a reversible process and the introduction of the clotrimazole in the polymeric gel do not modify the properties of the active substance of the pharmaceutical product.

Todica, M.; Pop, C. V.; Dinte, E.; Farcau, C.; Astilean, S.

230

A PRELIMINARY INVESTIGATION OF THE DIFFERENCES IN CHILDREN'S RETENTION OF INCONSIDERATE TEXT  

Microsoft Academic Search

Although findings from earlier studies suggest text?related reasons for why children experience difficulty reading content?area textbooks, they do not address the instructional implications associated with inconsiderate (Armbruster and Anderson, 1981) text, or more specifically, with text that lacks unity. The purpose of this study, therefore, was to investigate transition?stage readers retention of text lacking in unity. Thirty?three above average fourth

Donna E. Alvermann; Paula R. Boothby

1983-01-01

231

Alkali-free bioactive glasses for bone tissue engineering: A preliminary investigation  

SciTech Connect

An alkali-free series of bioactive glasses has been designed and developed in the glass system CaO-MgO-SiO2-P2O5-CaF2 along diopside (CaMgSi2O6) fluorapatite [Ca5(PO4)3F] tricalcium phosphate (3CaOP2O5) join. The silicate network in all the investigated glasses is predominantly coordinated in Q2 (Si) units while phosphorus tends to remain in orthophosphate (Q0) environment. The in vitro bioactivity analysis of glasses has been made by immersion of glass powders in simulated body fluid (SBF) while chemical degradation has been studied in Tris-HCl in accordance with ISO-10993-14. Some of the investigated glasses exhibit hydroxyapatite (HA) formation on their surface with in 1-12 h of their immersion in SBF solution. The sintering and crystallization kinetics of glasses has been investigated by differential thermal analysis (DTA) and hot-stage microscopy (HSM), respectively while the crystalline phase evolution in resultant glass-ceramics (GCs) has been studied in the temperature range of 800-900 oC using powder X-ray diffraction (XRD) and scanning electron microscope (SEM). The cell growth and osteogenic differentiation for glasses has been studied in vitro on sintered glass powder compacts using rat bone marrow mesenchymal stem cells. The as designed glasses are ideal candidates for their potential applications in bone tissue engineering in the form of bioactive glasses as well as glass/GC scaffolds.

Goel, Ashutosh; Kapoor, Saurabh; Rajagopal, Raghu R.; Pascual, Maria J.; Kim, Hae-Won; Ferreira, Jose M.

2011-08-25

232

Whistle register: a preliminary investigation by HSDI visualization and acoustics on female cases  

NASA Astrophysics Data System (ADS)

In this study we investigated laryngeal behaviors involved during vocal production of highest female vocal ranges in Flute in M3 Register, in Whistle Register and in a newly formulated by us, Hiss Register. Observations were carried with stroboscopy and High Speed Digital Imaging and with spectrographic and psycho-acoustic analysis by means of a software system having a wide spectral range (0-20.000 Hz). Results indicate that at the highest pitch vocal folds vibration is absent or significantly reduced, glottic contact is incomplete. These acoustic form of extreme pitch levels comprised intra-harmonic noise and overtones within 10 to 18 kHz range.

Di Corcia, Antonio; Fussi, Franco

2012-02-01

233

A preliminary investigation of cognitive function in rheumatoid arthritis patients on long-term methotrexate treatment.  

PubMed

Some studies suggest that cognitive function is impaired in rheumatoid arthritis patients. One possible influence may be commonly used rheumatoid arthritis treatment, methotrexate. This study examined cognitive function in long-term methotrexate users with rheumatoid arthritis and, using a 24-hour pre- and post-methotrexate dose administration, investigated whether there may be transient cognitive function changes. Rheumatoid arthritis patients (n = 35) were assessed immediately before taking methotrexate and 24 hours later. Low and high methotrexate dose groups were then compared. Cognitive performance was unchanged across two assessment points and was within the normal range, although lower in high methotrexate dose group. PMID:23188915

Meade, Tanya; Cumming, Steven; Hallab, Lisa; Spencer, David; Howe, Graydon; Manolios, Nicholas

2012-11-26

234

Preliminary dosimetry investigation of Tc-99m diagnostic radionuclide by NIPAM gel dosimeter  

NASA Astrophysics Data System (ADS)

The N-isopropylacrylamide (NIPAM) gel dosimeter was investigated as a suitable material for measuring absorbed doses from radionuclide sources. In this study, NIPAM gel dosimeter was used to evaluate the dose distributions of the Tc-99m radionuclide in NIPAM gel. The accumulated radioactivity range of the Tc-99m NIPAM gel is from approximately 0 MBq to 13.6 MBq (about 0.37 mCi). The NIPAM gel dosimeter with high stability and high-dose linear and non-energy dependent properties can provide various radiopharmaceutical activity intensities in the conduct of dose assessment in nuclear medicine, thereby producing the most promising dose verification tools.

Huang, You-Ruei; Chang, Yuan-Jen; Hsieh, Ling-Ling; Yu, Bi-Wei; Chu, Chien-Hau; Hsieh, Bor-Tsung

2013-06-01

235

Preliminary investigations of rat skin after topical application of optical clearing agent  

NASA Astrophysics Data System (ADS)

The tissue optical clearing technique based on immersion of tissues into optical clearing agents (OCAs) can enhance the penetration depth of light in tissues, thus improve the capabilities of noninvasive optical diagnosis and therapeutic treatment. However, the optical clearing efficiency of skin caused by topical application of OCAs usually suffers from the barrier of stratum corneum and epithelium. The addition of chemical penetration enhancers to OCAs could significantly improve the optical clearing of skin, but the investigations on their safety are seldom concerned. In this study, based on the direct observation and histological examinations, the short-term and long-term effects of the mixture of PEG-400 and Thiazone on morphology and microstructure of in vivo rat skin were investigated. The results demonstrated that, in the first week, the hair growth was stunted, some degree of abnormal thickens and vacuoles occurred at the epidermis layer, and the collagen arranged denser. After 2 week, the morphology and microstructure of rat skin was completely recovered. It means that there is no long-term effect on rat skin by the mixture of PEG-400 and Thiazone. In addition, this work provides a useful method for assessing the safety of OCAs to skin.

Wang, Jing; Zhu, Dan

2010-10-01

236

A Preliminary Investigation of Rapid Depressurization Phenomena Following a Sudden DLOFC in a VHTR  

SciTech Connect

Air ingress has been identified as a potential threat for Very High Temperature gas-cooled Reactors (VHTR). Reactor components constructed of graphite will, at high temperatures, produce exothermic reactions in the presence of oxygen. The danger lies in the possibility of fuel element damage and core structural failure. Previous investigations of air ingress mechanisms have focused on thermal and molecular diffusion, density-driven stratified flow due to hydrodynamic instability, and natural convection. Here, we investigate the possibility of a rapid flow reversal of helium coolant due to a Taylor (rarefaction) wave expansion after a hypothetical sudden Depressurized Loss of Forced Cooling (DLOFC) scenario in a VHTR. Conceivably, flow reversal of the helium coolant could entrain significant quantities of air into the reactor vessel. Our analysis starts with a one-dimensional shock tube simulation to simply illustrate the development of a Taylor wave with resulting reentrant flow. Then, a simulation is performed of an idealized two-dimensional axisymmetric representation of the lower plenum of General Atomics GT-MHR subjected to a hypothetical catastrophic break of the hot duct. Analysis shows the potential for significant and rapid air ingress into the reactor vessel in the case of a large break in the cooling system.

Richard C. Martineau; Ray A. Berry

2010-05-01

237

A preliminary investigation of the effect of force variation for myoelectric control of hand prosthesis.  

PubMed

The myoelectric control of prostheses has been an important area of research for the past 40 years. Significant advances have been achieved with Pattern Recognition (PR) systems regarding the number of movements to be classified with high accuracy. However, practical robustness still needs further research. This paper focuses on investigating the effect of the change in force levels by transradial amputee persons on the performance of PR systems. Two below-elbow amputee persons participated in the study. Three levels of forces (low, medium, and high) were recorded for different hand grips with the help of visual feedback from the Electromyography (EMG) signals. Results showed that changing the force level degraded the performance of the myoelectric control system by up to 60% with 12 EMG channels for 4 hand grips and a rest position. We investigated different EMG feature sets in combination with a Linear Discriminant Analysis (LDA) classifier. The performance was slightly better with Time Domain (TD) features compared to Auto Regression (AR) coefficients and Root Mean Square (RMS) features. Finally, the error of the classification was considerably reduced to approximately 17% when the PR system was trained with all force levels. PMID:24111046

Al-Timemy, Ali H; Bugmann, Guido; Escudero, Javier; Outram, Nicholas

2013-07-01

238

Investigation of Halogenated Components Formed from Chlorination of Natural Waters: Preliminary Studies  

SciTech Connect

Chlorination of power plant cooling water is extensively used as a means of controlling biofouling. This practice presents the potential for formation of halogenated organic compounds hazardous to man and his environment. Accordingly, the organic composition resulting from the chlorination of natural waters (northern Olympic Penn1sula sea water and the Columbia River in Washington State} has been investigated. Nonpolar lipophilic organic halogens were extracted by passing large volumes of water over columns of XAD-2 macroreticular resins. Examination of ether extracts from the resin columns using capillary gas chromatography revealed the presence of halogenated methanes, as well as other electron-capturing components~ that were not found when unchlorinated water was sampled. Examination of the chlorinated water extracts using gas chromatography/mass spectrometry revealed complex mixtures which generally were not separable into individual components~ even when high efficiency WCOT capillary columns were used. The samples were separated into fractions of increasing polarity using a water-deactivated silica gel column. Fractions were thus obtained which were more amenable to GC/MS investigation. Haloforms were identified as the major halogenated product from chlorination of the waters studied. Other halogenated products were found at much lower concentrations.

Bean, R. M.; Riley, R. G.

1980-11-01

239

The magnetic field investigation on the ULYSSES mission - Instrumentation and preliminary scientific results  

NASA Astrophysics Data System (ADS)

A fundamental feature of the heliosphere is the three-dimensional structure of the interplanetary magnetic field. The magnetic field investigation on Ulysses, the first space probe to explore the out-of-ecliptic and polar heliosphere, aims at determining the large-scale features and gradients of the field, as well as the heliolatitude dependence of interplanetary phenomena so far only observed near the ecliptic plane. The Ulysses magnetometer uses two sensors, one a Vector Helium Magnetometer, the other a Fluxgate Magnetometer. Onboard data processing yields measurements of the magnetic field vector with a time resolution up to 2 vectors/second and a sensitivity of about 10 pT. Since the switch-on of the instrument in flight on 25 October 1990, a steady stream of observations has been made, indicating that at this phase of the solar cycle the field is generally disturbed: several shock waves and a large number of discontinuities have been observed, as well as several periods with apparently intense wave activity. The paper gives a brief summary of the scientific objectives of the investigation, followed by a detailed description of the instrument and its characteristics. Examples of wave bursts, interplanetary shocks and crossings of the heliospheric current sheet are given to illustrate the observations made with the instrument.

Balogh, A.; Beek, T. J.; Forsyth, R. J.; Hedgecock, P. C.; Marquedant, R. J.; Smith, E. J.; Southwood, D. J.; Tsurutani, B. T.

1992-01-01

240

A preliminary investigation of cell growth after irradiation using a modulated x-ray intensity pattern  

NASA Astrophysics Data System (ADS)

In this study we have investigated a spatial distribution of cell growth after their irradiation using a modulated x-ray intensity pattern. An A549 human non-small cell lung cancer cell line was grown in a 6-well culture. Two of the wells were the unirradiated control wells, whilst another two wells were irradiated with a modulated x-ray intensity pattern and the third two wells were uniformly irradiated. A number of plates were incubated for various times after irradiation and stained with crystal violet. The spatial distribution of the stained cells within each well was determined by measurement of the crystal violet optical density at multiple positions in the plate using a microplate photospectrometer. The crystal violet optical density for a range of cell densities was measured for the unirradiated well and this correlated with cell viability as determined by the MTT cell viability assay. An exponential dose response curve was measured for A549 cells from the average crystal violet optical density in the uniformly irradiated well up to a dose of 30 Gy. By measuring the crystal violet optical density distribution within a well the spatial distribution of cell growth after irradiation with a modulated x-ray intensity pattern can be plotted. This method can be used for in vitro investigation into the changes in radiation response associated with treatment using intensity modulated radiation therapy (IMRT).

Bromley, Regina; Davey, Ross; Oliver, Lyn; Harvie, Rozelle; Baldock, Clive

2006-08-01

241

Urinary metabolomics in newborns infected by human cytomegalovirus: a preliminary investigation.  

PubMed

Human cytomegalovirus (HCMV) represents one of the most significant viral risks of birth defects and long-term sequelae. The severity of the infection depends on the form of the disease, which can be symptomatic or asymptomatic with or without sequelae. The aim of this study was to investigate in a population of newborns the impact of HCMV infection on the urine metabolome by using (1)H-nuclear magnetic resonance (NMR) spectroscopy combined with multivariate statistical analysis. Twenty-three children born from women with a primary HCMV infection during pregnancy were recruited. Twelve were HCMV infected at birth whereas eleven were not infected (control). The (1)H-NMR spectra were analyzed using a PLS-DA mathematical model in order to identify the discriminant metabolites between the asymptomatic and the control group. The most important metabolites characterizing the clustering of the samples were: myoinositol, glycine, 3-hydroxybutyrate, 3-aminoisobutyrate, creatine, taurine and betaine. These findings suggest the use of metabolomics as a useful new tool in the investigation of HCMV congenital infection. PMID:23809353

Fanos, Vassilios; Locci, Emanuela; Noto, Antonio; Lazzarotto, Tiziana; Manzoni, Paolo; Atzori, Luigi; Lanari, Marcello

2013-06-01

242

Investigations of the low- and high-frequency response of ?sensors used in dynamic heat capacity measurements  

Microsoft Academic Search

The 0957-0233\\/9\\/11\\/013\\/img6-method is used to study time dependent processes through measurements of dynamic heat capacity. The 0957-0233\\/9\\/11\\/013\\/img6-sensor is a thin 0957-0233\\/9\\/11\\/013\\/img8 metal strip which is evaporated onto a substrate. The sample is probed by periodic diffusive thermal waves of frequency 0957-0233\\/9\\/11\\/013\\/img9 emitted from the strip. The heater temperature 0957-0233\\/9\\/11\\/013\\/img10 measured at frequency 0957-0233\\/9\\/11\\/013\\/img6 yields the dynamic heat capacity. The validity

Ulf G. Jonsson; Ove Andersson

1998-01-01

243

A preliminary qualitative investigation of voice hearing and its association with dissociation in chronic PTSD.  

PubMed

Following on from a quantitative study, this research used a qualitative methodology to investigate the lived experience of 3 men with chronic posttraumatic stress disorder associated with the conflict in Northern Ireland who reported auditory hallucinations. Data analysis used the Framework method. Results showed that beliefs about voices, dissociation of identity and body, and interpersonal impact were central superordinate themes associated with auditory hallucinations in posttraumatic stress disorder. Central subordinate themes included feeling a lack of controllability over voices, experiencing them as ego-dystonic, and feeling an increased sense of isolation and shame because of their presence. Results provide an in-depth analysis of participants' lived experiences and enhance understanding of previous quantitative findings. PMID:21240740

Anketell, Caroline; Dorahy, Martin J; Curran, David

2011-01-01

244

Long-term maintenance following attainment of goal weight: a preliminary investigation.  

PubMed

The present study sought to determine whether the high relapse rates observed among subjects in fixed length behavioral-based weight loss programs would be lowered if subjects were allowed to continue in treatment until they had reached their desired weights. Five hundred seventeen (517) clients at a commercial weight-loss program were surveyed approximately 1 year posttreatment regarding their current weight status. Of the 267 subjects who responded to the mailed survey, it was found that 82% remained within 10% of their posttreatment weights at the time of the follow-up. Of particular interest was the fact that weight trends during the intervening year suggested subjects were actively and effectively calibrating their weight. It was concluded that the high relapse rates typical for this mode of treatment may be an artifact of premature treatment cessation and further investigation is indeed merited. PMID:1442240

Wolfe, B L

245

Preliminary investigation and application of alternate dry gas seal face materials{copyright}  

SciTech Connect

Traditional seal mating ring materials such as tungsten carbide (WC) are commonly used in high pressure centrifugal gas compressor dry gas (gas lubricating film) seal applications. Although these materials possess desirable properties for minimizing thermal distortion and deformation when subjected to pressure and centrifugal force, they have low toughness, i.e., they are brittle and have poor resistance to thermal shock. It has been found that these materials are easily heat checked during seal face touchdown. Heat checking as well as other crack indications inherent in these materials can quickly propagate, resulting in a catastrophic seal ring failure. In this paper, an investigation of alternate seal face materials is described. Two ductile, nitrided, low ferrous materials proved to be readily manufacturable into dry gas seal rings and performed comparably to tungsten carbide in natural gas service. 10 refs., 13 figs., 5 tabs.

Evenson, R.; Peterson, R.; Hanson, R. [NOVA Corp. of Alberta, Calgary (Canada)

1994-01-01

246

Preliminary investigation of seismic damage to two steel space structures during the 2013 Lushan earthquake  

NASA Astrophysics Data System (ADS)

Severe damage to steel space structures is rarely reported when compared to other structural systems damaged during past major earthquakes around the world. Two gymnasiums of steel space structures in downtown Lushan County that were damaged during the 2013 M7.0 Lushan earthquake in China were investigated and the observations are summarized in this paper. Typical damage to these two steel space structures ranges from moderate to severe. Moderate damage includes global buckling and dislocation of bolted connections of truss members, and inelastic elongation of anchor bolts and sliding of pedestal plates of supports. Severe damage includes member fracture caused by local buckling, and fracture failure of anchor bolts and welds. The distribution of structural damage to these two structures is described in detail and future research opportunities are suggested.

Dai, Junwu; Qu, Zhe; Zhang, Chenxiao; Weng, Xuran

2013-09-01

247

Preliminary investigation of PAGAT polymer gel radionuclide dosimetry of Tc-99m  

NASA Astrophysics Data System (ADS)

PAGAT polymer gel was investigated as a suitable dosimeter materials for measuring absorbed dose from the unsealed source radionuclide Tc-99m. Differing amounts of Tc-99m over the range of 25-5000 MBq were introduced into a normoxic polymer gel mixture (PAGAT) in sealed nitrogen-filled P6 glass vials. After irradiation the gels were evaluated using MRI more than 48 hours after preparation to allow for radioactive decay. The dose delivered to the vial was also calculated empirically. R2 versus total activity curves were obtained over a number of experiments and these were used to evaluate the relationship between the amount of gel polymerization and the dose deposited by the radionuclide. A linear response up to 1000 MBq (corresponding to 20Gy) was displayed and was still behaving monotonically at 5000 MBq. Polymer gels offer the potential to measure radiation dose three-dimensionally using MRI.

Braun, Kelly; Bailey, Dale; Hill, Brendan; Baldock, Clive

2009-05-01

248

Predicting diagnostic error in radiology via eye-tracking and image analytics: Preliminary investigation in mammography.  

PubMed

Purpose: The primary aim of the present study was to test the feasibility of predicting diagnostic errors in mammography by merging radiologists' gaze behavior and image characteristics. A secondary aim was to investigate group-based and personalized predictive models for radiologists of variable experience levels.Methods: The study was performed for the clinical task of assessing the likelihood of malignancy of mammographic masses. Eye-tracking data and diagnostic decisions for 40 cases were acquired from four Radiology residents and two breast imaging experts as part of an IRB-approved pilot study. Gaze behavior features were extracted from the eye-tracking data. Computer-generated and BIRADS images features were extracted from the images. Finally, machine learning algorithms were used to merge gaze and image features for predicting human error. Feature selection was thoroughly explored to determine the relative contribution of the various features. Group-based and personalized user modeling was also investigated.Results: Machine learning can be used to predict diagnostic error by merging gaze behavior characteristics from the radiologist and textural characteristics from the image under review. Leveraging data collected from multiple readers produced a reasonable group model [area under the ROC curve (AUC) = 0.792 0.030]. Personalized user modeling was far more accurate for the more experienced readers (AUC = 0.837 0.029) than for the less experienced ones (AUC = 0.667 0.099). The best performing group-based and personalized predictive models involved combinations of both gaze and image features.Conclusions: Diagnostic errors in mammography can be predicted to a good extent by leveraging the radiologists' gaze behavior and image content. PMID:24089908

Voisin, Sophie; Pinto, Frank; Morin-Ducote, Garnetta; Hudson, Kathleen B; Tourassi, Georgia D

2013-10-01

249

Pathophysiology of chronic constipation in anorectal malformations. Long-term results and preliminary anatomical investigations.  

PubMed

Posterior sagittal anorectoplasty provides an optimal access to reconstruct the muscle complex in anorectal malformations. It gives much better results than the abdominoperineal pullthrough procedures performed before 1984. However, severe chronic constipation occurs postoperatively in about 10 % of the patients, which can only be treated by washouts. Clinical investigations of 578 patients treated from 1962 to 1984 and from 1985 to 1997 are presented here and both groups are compared to each other. In addition, a new continence score with special regard to chronic constipation and overflow incontinence was used to follow up 133 patients of the second group. The score distinguishes between children above and below the age of 3 years. To study the underlying reasons of severe chronic constipation in children with anorectal malformations, macro- and microanatomical investigations on 4 normal newborns, 3 neonatal piglets with imperforate anus and 25 rectal biopsies from the caecum were performed. The following reasons have been found to be probably responsible for postoperative constipation and overflow incontinence: 1. Malformations of the smooth and striated muscle fibres or connective tissue of the caecum; 2. Malformations of the intramural nerve plexus such as aganglionosis, hypoganglionosis or IND; 3. Malformations and/or iatrogenic lesions of the extramural nerve supply which runs anterior to the rectum and in front of the fascia of Denonvilliers, which can hardly be identified in neonates with imperforate anus. Therefore iatrogenic bladder injuries may occur after PSARP after extended mobilisation of the caecum. The macro- and microanatomical situation in the piglet with imperforate anus is totally different from the human newborn. PMID:11719867

Holschneider, A M; Koebke, J; Meier-Ruge, W; Land, N; Jesch, N K; Pfrommer, W

2001-10-01

250

Investigation of the Variation of the Specific Heat Capacity of Local Soil Samples from the Niger delta, Nigeria with Moisture Content.  

National Technical Information Service (NTIS)

Results of an investigation of the variation, with moisture content, of the specific heat capacity of samples of three texturally different types of soil (clayey, sandy and sandy loam) obtained from the Niger delta area of Nigeria, are presented. The resu...

C. O. Ofoegbu S. K. Adjepong

1987-01-01

251

Preliminary Investigations of Joining Technologies for Attaching Refractory Metals to Ni-Based Superalloys  

SciTech Connect

In this study, a range of joining technologies has been investigated for creating attachments between refractory metal and Ni-based superalloys. Refractory materials of interest include Mo-47%Re, T-111, and Ta-10%W. The Ni-based superalloys include Hastelloy X and MarM 247. During joining with conventional processes, these materials have potential for a range of solidification and intermetallic formation-related defects. For this study, three non-conventional joining technologies were evaluated. These included inertia welding, electro-spark deposition (ESD) welding, and magnetic pulse welding (MPW). The developed inertia welding practice closely paralleled that typically used for the refractory metals alloys. Metallographic investigations showed that forging during inertia welding occurred predominantly on the refractory metal side. It was also noted that at least some degree of forging on the Ni-based superalloy side of the joint was necessary to achieve consistent bonding. Both refractory metals were readily weldable to the Hastelloy X material. When bonding to the MarM 247, results were inconsistent. This was related to the higher forging temperatures of the MarM 247, and subsequent reduced deformation on that material during welding. ESD trials using a Hastelloy X filler were successful for all material combinations. ESD places down very thin (5- to 10-{mu}m) layers per pass, and interactions between the substrates and the fill were limited (at most) to that layer. For the refractory metals, the fill only appeared to wet the surface, with minimal dilution effects. Microstructures of the deposits showed high weld metal integrity with maximum porosity on the order of a few percent. Some limited success was also obtained with MPW. In these trials, only the T-111 tubes were used. Joints were possible for the T-111 tube to the Hastelloy X bar stock, but the stiffness of the tube (resisting collapse) necessitated the use of very high power levels. These power levels resulted in damage to the equipment (concentrator) during welding. It is of note that the joint made showed the typical wavy bond microstructure associated with magnetic pulse/explosion bond joints. Joints were not possible between the T-111 tube and the MarM 247 bar stock. In this case, the MarM 247 shattered before sufficient impact forces could be developed for bonding.

Gould, Jerry E. [Edison Welding Institute, 1250 Arthur E. Adams Drive, Columbus, OH 43221 (United States); Ritzert, Frank J. [NASA Glenn Research Center, 21000 Brookpark Road, Mail Stop 49-1, Cleveland, OH 44135 (United States); Loewenthal, William S. [Ohio Aerospace Institute, 21000 Brookpark Road, Mail Stop 49-1, Cleveland, OH 44135 (United States)

2006-01-20

252

CHARACTERIZATION OF PHENOLIC COMPOUNDS IN STRAWBERRY FRUITS BY RP-HPLC-DAD AND INVESTIGATION OF THEIR ANTIOXIDANT CAPACITY  

Microsoft Academic Search

This research was undertaken to evaluate the phenolic compositions and antioxidant capacities of strawberry cultivars (Camarosa, Seyhun, and Osmanli) grown in Turkey. High performance liquid chromatography coupled with diode array and coulometric array detectors were used to characterize and quantify organic acids and phenolic compounds. Four organic acids (citric, malic, shikimic, and ascorbic acids) were determined. The major organic acid

Hasim Kelebek; Serkan Selli

2011-01-01

253

Investigation of the spatial distribution of the maximum water retention capacity of soil in a small river basin  

Microsoft Academic Search

The maximum water retention capacity of soils is crucial for runoff generation, flow regime and hence also for the watershed behaviour during rainfall events. High infiltration rates of soils lead to a decreased in peak discharge reducing flood risk in river basins. In catchments where agricultural lands are prevailing, American Soil Conservation Service (SCS) - Runoff Curve Number Method is

Angelantonio Calabrese; Anna Maria de Girolamo; Antonio Lo Porto; Giuseppe Pappagallo; Gerardina Santese

2010-01-01

254

A preliminary investigation into the aetiology of Meares-Irlen syndrome.  

PubMed

A recent double-masked placebo-controlled trial has confirmed that some children experience a reduction in symptoms of eyestrain and headache when they read through individually prescribed coloured filters and has shown that this benefit cannot be solely attributed to a placebo effect. People who are helped by coloured filters in this way have been described as having "Meares-Irlen syndrome'. We investigated the mechanism of this benefit by studying the optometric and visual perceptual characteristics of the children in the double-masked study. This population had normal refractive errors and heterophorias (none of the subjects had strabismus). They demonstrated slightly, but significantly, reduced amplitudes of accommodation and vergence and poor stereo-acuity. However, these factors seemed to be correlates of Meares-Irlen syndrome rather than the underlying cause. Pattern glare, a sensitivity to striped patterns (e.g. lines of text), was prevalent in our sample and was significantly associated with the subjects' symptoms. The spatial contrast sensitivity function was normal. PMID:8796197

Evans, B J; Wilkins, A J; Brown, J; Busby, A; Wingfield, A; Jeanes, R; Bald, J

1996-07-01

255

A preliminary investigation into optimising the response of vibrating systems used for ultrasonic cutting  

NASA Astrophysics Data System (ADS)

The coupling of two non-linear oscillators is investigated, each with opposing non-linear overhang characteristics in the frequency domain as a result of positive and negative cubic stiffness. This leads to the definition of a two-degree-of-freedom Duffing oscillator in which such non-linear effects can be neutralised under certain dynamic conditions. The physical motivation for this system stems from applications in ultrasonic cutting in which an exciter drives a tuned blade. The exciter and the blade are both strongly non-linear, with features strongly reminiscent of positive and negative cubic effects. It is shown by means of approximate analysis that in the case of simple idealised coupled oscillator models a practically useful mitigating effect on the overall non-linear response of the system is observed when one of the cubic stiffnesses is varied. Experimentally, it has also been demonstrated that coupling of ultrasonic components with different non-linear characteristics can strongly influence the performance of the system and that the general behaviour of the hypothetical theoretical model is indeed borne out in practice.

Lim, F. C. N.; Cartmell, M. P.; Cardoni, A.; Lucas, M.

2004-05-01

256

Preliminary experimental investigation of a dual-band relativistic backward wave oscillator with dual beams  

SciTech Connect

A dual-band relativistic backward wave oscillator with dual electron beams generating C-band and X-band microwaves is investigated experimentally. The frequencies, powers, and radiation patterns of the dual-band microwaves are measured. With the diode voltage of 657 kV and the total beam current of 14 kA guided by a magnetic field of about 1.7 T, the dual-band microwaves are generated with dominant frequencies of 4.58 and 8.30 GHz close to the results from the particle-in-cell simulation. The powers of the C-band and X-band microwaves are 520 and 113 MW, respectively. The effects of variations in the guiding magnetic field and diode voltage on the powers of the dual-band microwaves are presented and discussed. The radiation patterns of the dual-band microwaves from the radiating antenna are tested both corresponding to a TM{sub 01} mode and the independency of the operation processes of them is discussed.

Wang Ting; Qian Baoliang; Zhang Jiande; Zhang Xiaoping; Cao Yibing; Zhang Qiang [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2011-01-15

257

Preliminary investigation of /sup 252/Cf-driven neutron noise analysis for subcritical fuel solution systems  

SciTech Connect

A method for determining the reactivity of highly subcritical systems of fissile material, using neutron-noise power spectral densities in conjunction with a /sup 252/Cf source, had previousy been tested in two fast reactor critical assemblies (a mockup of the Fast Flux Test Facility reactor and unreflected enriched uranium metal assemblies) and one thermal reactor (a light-water moderated and reflected lattice of Oak Ridge Research Reactor fuel elements). The last-mentioned test demonstrated the effectiveness of the method in water-moderated systems and thereby prompted the present study of its application to facilities for fuel preparation, reprocessing, and storage. To investigate the applicability of this method to facilities for fuel preparation, reprocessing, and storage, limited experiments were performed with a uranyl fluoride solution. The Los Alamos National Laboratory SHEBA facility, an unreflected cylindrical tank (56 cm diam), was partially filled with a solution containing 5 wt % /sup 235/U-enriched uranium (rho (U) approx. 1 g/cm/sup 3/, H/U atomic ratio approx. 550). The tank had a central 5-cm-diam axial hole in which the /sup 252/Cf source was placed at the midpoint of the solution. Measurements were performed at various solution heights from 60% of the critical height to near-critical height (approx. 36 cm).

Mihalczo, J.T.; Kryter, R.C.; King, W.T.

1981-01-01

258

Does using an ejector chair affect muscle activation patterns in rheumatoid arthritic patients? A preliminary investigation.  

PubMed

The present study examined knee and arm extensor muscle activation patterns displayed by 12 elderly female rheumatoid arthritic patients (mean age = 65.5 +/- 8.6 yr) rising from an instrumented Eser ejector chair under four conditions: high seat (540 mm), low seat (450 mm), with and without ejector assistance. Electromyographic (EMG) signals were sampled (1000 Hz) for vastus lateralis (VL), vastus medialis (VM), rectus femoris (RF) and triceps brachii (TB) using a Noraxon Telemyo System (bandwidth 0-340 Hz). Muscle onset, offset and peak activity relative to loss of seat contact (SS), and integrated EMG, were calculated for each muscle burst before SS. A high seat significantly (p < or = 005) decreased VL and TB intensity but did not change muscle activation patterns compared with rising from a low seat. Ejector assistance significantly increased VM and RF burst duration and RF intensity but had no effect on vastii muscle intensity. It was concluded that concerns pertaining to muscle disuse when rising with ejector assistance were unfounded in the present study. However, further research is required to investigate the effects of habitual use of a mechanical ejector device on muscle activation patterns. PMID:10659447

Munro, B J; Steele, J R

2000-02-01

259

Friction Stir Lap Welding of Magnesium Alloy to Steel: A Preliminary Investigation  

SciTech Connect

An initial study was made to evaluate the feasibility of joining Magnesium alloy AZ31 sheet to galvanized steel sheet in lap configuration using friction stir welding (FSW). Two different automotive sheet steels were used for comparative evaluation of the dissimilar joining potential; a 0.8mm thick, electro galvanized (EG) mild steel, and a 1.5mm thick hot dipped galvanized (HDG) high-strength, low-alloy steel (HSLA). These steels were joined to 2.33mm thick AZ31B magnesium sheet. A single FSW tool design was used for both dissimilar welds, and process parameters were kept the same. Average peak load for the AZ31-1.5 mm steel weld joint in lap shear mode was found to be 6.3 1.0 kN. For the AZ31-0.8 mm steel weld, joint strength was 5.1 1.5 kN. Microstructural investigation indicates melting of the Zn coating at the interface and subsequent alloying with the Mg sheet resulting in formation of solidified Zn-Mg alloy layer at AZ31/steel interface.

Jana, Saumyadeep; Hovanski, Yuri; Grant, Glenn J.

2010-12-01

260

Preliminary investigation on CAD system update: effect of selection of new cases on classifier performance  

NASA Astrophysics Data System (ADS)

When a computer-aided diagnosis (CAD) system is used in clinical practice, it is desirable that the system is constantly and automatically updated with new cases obtained for performance improvement. In this study, the effect of different case selection methods for the system updates was investigated. For the simulation, the data for classification of benign and malignant masses on mammograms were used. Six image features were used for training three classifiers: linear discriminant analysis (LDA), support vector machine (SVM), and k-nearest neighbors (kNN). Three datasets, including dataset I for initial training of the classifiers, dataset T for intermediate testing and retraining, and dataset E for evaluating the classifiers, were randomly sampled from the database. As a result of intermediate testing, some cases from dataset T were selected to be added to the previous training set in the classifier updates. In each update, cases were selected using 4 methods: selection of (a) correctly classified samples, (b) incorrectly classified samples, (c) marginally classified samples, and (d) random samples. For comparison, system updates using all samples in dataset T were also evaluated. In general, the average areas under the receiver operating characteristic curves (AUCs) were almost unchanged with method (a), whereas AUCs generally degraded with method (b). The AUCs were improved with method (c) and (d), although use of all available cases generally provided the best or nearly best AUCs. In conclusion, CAD systems may be improved by retraining with new cases accumulated during practice.

Muramatsu, Chisako; Nishimura, Kohei; Hara, Takeshi; Fujita, Hiroshi

2013-02-01

261

Investigation on the high efficiency volume Bragg gratings performances for spectrometry in space environment: preliminary results  

NASA Astrophysics Data System (ADS)

The special properties of Volume Bragg Gratings (VBGs) make them good candidates for spectrometry applications where high spectral resolution, low level of straylight and low polarisation sensitivity are required. Therefore it is of interest to assess the maturity and suitability of VBGs as enabling technology for future ESA missions with demanding requirements for spectrometry. The VBGs suitability for space application is being investigated in the frame of a project led by CSL and funded by the European Space Agency. The goal of this work is twofold: first the theoretical advantages and drawbacks of VBGs with respect to other technologies with identical functionalities are assessed, and second the performances of VBG samples in a representative space environment are experimentally evaluated. The performances of samples of two VBGs technologies, the Photo-Thermo-Refractive (PTR) glass and the DiChromated Gelatine (DCG), are assessed and compared in the H?, O2-B and NIR bands. The tests are performed under vacuum condition combined with temperature cycling in the range of 200 K to 300K. A dedicated test bench experiment is designed to evaluate the impact of temperature on the spectral efficiency and to determine the optical wavefront error of the diffracted beam. Furthermore the diffraction efficiency degradation under gamma irradiation is assessed. Finally the straylight, the diffraction efficiency under conical incidence and the polarisation sensitivity is evaluated.

Loicq, Jrme; Gaspar Venancio, Luis Miguel; Georges, Marc

2012-09-01

262

A preliminary investigation of acid-catalyzed polymerization reactions of shale oil distillates  

SciTech Connect

Sinor (1989) reported that a major specialty market may exist for shale oil as an asphalt blending material. Shale oil can be converted to an asphalt blending material by acid catalyzed condensation and polymerization reactions of the many molecular species comprising the composition of shale oil. To simplify the investigation, crude shale oil was separated by distillation into three distillates of different hydrocarbon and heteroaromatic compositions. These distillates were then treated with two different types of acids to determine the effect of acid type on the end products. Three western shale oil distillates, a naphtha, a middle distillate, and an atmospheric gas oil, were reacted with anhydrous AlCl{sub 3} and 85% H{sub 2}SO{sub 4} under low-severity conditions. At relatively low temperatures, little change in the hydrocarbon composition was noted for the AlCl{sub 3} reactions. AlCl{sub 3}{center_dot} (a polymerized product and/or complex) was formed. However, it is assumed that the sludge was mainly the result of heteroaromatic-AlCl{sub 3} reactions.

Netzel, D.A.

1991-04-01

263

A preliminary investigation of acid-catalyzed polymerization reactions of shale oil distillates  

SciTech Connect

Sinor (1989) reported that a major specialty market may exist for shale oil as an asphalt blending material. Shale oil can be converted to an asphalt blending material by acid catalyzed condensation and polymerization reactions of the many molecular species comprising the composition of shale oil. To simplify the investigation, crude shale oil was separated by distillation into three distillates of different hydrocarbon and heteroaromatic compositions. These distillates were then treated with two different types of acids to determine the effect of acid type on the end products. Three western shale oil distillates, a naphtha, a middle distillate, and an atmospheric gas oil, were reacted with anhydrous AlCl{sub 3} and 85% H{sub 2}SO{sub 4} under low-severity conditions. At relatively low temperatures, little change in the hydrocarbon composition was noted for the AlCl{sub 3} reactions. AlCl{sub 3}{center dot} (a polymerized product and/or complex) was formed. However, it is assumed that the sludge was mainly the result of heteroaromatic-AlCl{sub 3} reactions.

Netzel, D.A.

1991-04-01

264

Changes of substance P in the crevicular fluid in relation to orthodontic movement preliminary investigation.  

PubMed

Substance P (SP) is a tachykinin released from both the central and the peripheral endings of primary afferent neurons and functions as a neurotransmitter. As a transmitter signaling pain, substance P is involved in nociception and is an extremely potent vasodilator. We found several studies about this neuropeptide especially in relation to parodontology and a few orthodontic reviews. This is because in the past the importance of this neuropeptide in dental element undergoing periodontal inflammation was observed. The aims of the present pilot study was to investigate whether the substance P was present in gingival crevicular fluid in dental elements undergoing orthodontic treatment with Invisalign technique compared to teeth belonging to the same series but not undergoing orthodontic movement. We analysed gengival crevicular fluid (GCF) collected from four young subjects, using a paper cone for a time of 60 seconds. The results showed that SP is present in the gengival sulcus in elements undergoing orthodontic forces during treatment with Invisalign technique and not in the control teeth. During the literature analysis, we have found a lot of papers describing involvement of SP in periodontitis and inflammatory diseases, but further studies are needed in order to demonstrate the role of this neuropeptide during teeth movement. PMID:23737731

Levrini, Luca; Sacerdote, Paola; Moretti, Sarah; Panzi, Silvia; Caprioglio, Alberto

2013-04-23

265

Preliminary experimental investigation of a dual-band relativistic backward wave oscillator with dual beams  

NASA Astrophysics Data System (ADS)

A dual-band relativistic backward wave oscillator with dual electron beams generating C-band and X-band microwaves is investigated experimentally. The frequencies, powers, and radiation patterns of the dual-band microwaves are measured. With the diode voltage of 657 kV and the total beam current of 14 kA guided by a magnetic field of about 1.7 T, the dual-band microwaves are generated with dominant frequencies of 4.58 and 8.30 GHz close to the results from the particle-in-cell simulation. The powers of the C-band and X-band microwaves are 520 and 113 MW, respectively. The effects of variations in the guiding magnetic field and diode voltage on the powers of the dual-band microwaves are presented and discussed. The radiation patterns of the dual-band microwaves from the radiating antenna are tested both corresponding to a TM01 mode and the independency of the operation processes of them is discussed.

Ting, Wang; Bao-Liang, Qian; Jian-de, Zhang; Xiao-Ping, Zhang; Yi-Bing, Cao; Qiang, Zhang

2011-01-01

266

The effects of subgingival irrigation with chlorhexidine and stannous fluoride. A preliminary investigation.  

PubMed

This pilot study compared the effectiveness of subgingival irrigation with 0.12% chlorhexidine, 1.64% stannous fluoride, and sterile saline, in addition to scaling and root planing, on levels of Bacteroides porphyromonas and the clinical parameters bleeding tendency, probing depth, and attachment level. A convenience sample of eight patients, exhibiting 32 sites with moderate periodontal disease, was randomly assigned to receive all treatments according to a four-quadrant treatment design. Subgingival irrigation was performed at 0, 1, 2, and 3 weeks following scaling and root planing. Clinical and microbial assessments were measured at baseline, 4, 8, and 12 weeks. Data were analyzed using a two-factor repeated measure analysis of variance, and the Newman-Keuls sequential range test or Friedman test and Kruskal-Wallis test revealed statistically significant (p less than .01) improvements in probing depths, attachment levels, and Bacteroides porphyromonas for all groups at 12 weeks when compared to baseline values. No statistically significant differences occurred between any of the treatment groups at any time period. Based on the findings of this investigation, it has been concluded that four weekly irrigations with 0.12% chlorhexidine, 1.64% stannous fluoride, or saline irrigation did not enhance the beneficial effects of scaling and root planing alone. PMID:1668099

Krust, K S; Drisko, C L; Gross, K; Overman, P; Tira, D E

267

Preliminary investigation of the use of air injection to mitigate cavitation erosion  

SciTech Connect

This project was initiated as part of a new research and development focus to improve hydropower generation. One aspect of the problem is severe cavitation erosion which is experienced when hydroturbines are operated at best power or in spinning reserve. Air injection has been used successfully to minimize or eliminate cavitation erosion in other applications. Thus, an investigation was initiated to determine whether or not air injection would be an effective solution for turbine erosion problems. A specially instrumented hydrofoil of elliptic planform and a NACA 0015 cross section was tested at flow velocities up to 20 m s{sup {minus}1}, at various values of cavitation index. Although pit sizes were measured on a soft aluminum insert, pitting rate was not measured directly but was inferred from direct measurement of impulsive pressures on the surface of the hydrofoil and by monitoring accelerometers mounted at the base of the hydrofoil. Cavitation noise was also measured by a hydrophone positioned in the water tunnel test section. Air was injected through small holes in the leading edge of the foil. Air injection was found to be very effective in minimizing erosion as inferred from all three cavitation erosion detection techniques.

Arndt, R.E.A.; Ellis, C.R.; Paul, S. [Univ. of Minnesota, Minneapolis, MN (United States). St. Anthony Falls Hydraulic Lab.

1995-09-01

268

Multifractal detrended fluctuation analysis of human EEG: preliminary investigation and comparison with the wavelet transform modulus maxima technique.  

PubMed

Recently, many lines of investigation in neuroscience and statistical physics have converged to raise the hypothesis that the underlying pattern of neuronal activation which results in electroencephalography (EEG) signals is nonlinear, with self-affine dynamics, while scalp-recorded EEG signals themselves are nonstationary. Therefore, traditional methods of EEG analysis may miss many properties inherent in such signals. Similarly, fractal analysis of EEG signals has shown scaling behaviors that may not be consistent with pure monofractal processes. In this study, we hypothesized that scalp-recorded human EEG signals may be better modeled as an underlying multifractal process. We utilized the Physionet online database, a publicly available database of human EEG signals as a standardized reference database for this study. Herein, we report the use of multifractal detrended fluctuation analysis on human EEG signals derived from waking and different sleep stages, and show evidence that supports the use of multifractal methods. Next, we compare multifractal detrended fluctuation analysis to a previously published multifractal technique, wavelet transform modulus maxima, using EEG signals from waking and sleep, and demonstrate that multifractal detrended fluctuation analysis has lower indices of variability. Finally, we report a preliminary investigation into the use of multifractal detrended fluctuation analysis as a pattern classification technique on human EEG signals from waking and different sleep stages, and demonstrate its potential utility for automatic classification of different states of consciousness. Therefore, multifractal detrended fluctuation analysis may be a useful pattern classification technique to distinguish among different states of brain function. PMID:23844189

Zorick, Todd; Mandelkern, Mark A

2013-07-03

269

A preliminary investigation assessing the viability of classifying hand postures in seniors  

PubMed Central

Background Fear of frailty is a main concern for seniors. Surface electromyography (sEMG) controlled assistive devices for the upper extremities could potentially be used to augment seniors' force while training their muscles and reduce their fear of frailty. In fact, these devices could both improve self confidence and facilitate independent leaving in domestic environments. The successful implementation of sEMG controlled devices for the elderly strongly relies on the capability of properly determining seniors' actions from their sEMG signals. In this research we investigated the viability of classifying hand postures in seniors from sEMG signals of their forearm muscles. Methods Nineteen volunteers, including seniors (70 years old in average) and young people (27 years old in average), participated in this study and sEMG signals from four of their forearm muscles (i.e. Extensor Digitorum, Palmaris Longus, Flexor Carpi Ulnaris and Extensor Carpi Radialis) were recorded. The feature vectors were built by extracting features from each channel of sEMG including autoregressive (AR) model coefficients, waveform length and root mean square (RMS). Multi-class support vector machines (SVM) was used as a classifier to distinguish between fifteen different essential hand gestures including finger pinching. Results Classification of hand gestures both in the pronation and supination positions of the arm was possible. Classified hand gestures were: rest, ulnar deviation, radial deviation, grasp and four different finger pinching configurations. The obtained average classification accuracy was 90.6% for the seniors and 97.6% for the young volunteers. Conclusions The obtained results proved that the pattern recognition of sEMG signals in seniors is feasible for both pronation and supination positions of the arm and the use of only four EMG channel is sufficient. The outcome of this study therefore validates the hypothesis that, although there are significant neurological and physical changes occurring in humans while ageing, sEMG controlled hand assistive devices could potentially be used by the older people.

2011-01-01

270

Investigation of unstabilized polyvinyl chloride (PVC) for use as a long-term UV dosimeter: preliminary results  

NASA Astrophysics Data System (ADS)

A new chemical UV dosimeter with a larger dose capacity than existing chemical dosimeters has been investigated for long-term UV measurements. Unstabilized polyvinyl chloride (PVC), cast in 40 m thick film, has been found to respond to at least 745 SED (Standard Erythema Dose = 100 J m-2) of solar UV radiation, which is equivalent to about two to three summer weeks of exposure in subtropical sites. The UV-induced changes in the PVC dosimeter were quantified using a Fourier transform infrared spectrophotometer and the decrease in the absorption intensity of the 1064 cm-1 peak was employed to quantify these changes. Dose response curves have been established by relating the decrease in the PVC dosimeter's absorption intensity at 1064 cm-1 to the corresponding absolute and erythemal UV exposure dose.

Amar, Abdurazaq; Parisi, Alfio V.

2012-08-01

271

Buffer-gas-cooled ion clouds in a classical Paul trap: superimposed stability diagrams and trapping capacity investigations  

NASA Astrophysics Data System (ADS)

Ion clouds of different species and variable size are stored in a 3D Paul trap and detected after extraction from the trap. We report on measurements of the superimposed stability regions of four simultaneously stored ion species. We determine the operating conditions for trapping capacity under variation of buffer gas pressure and observe space charge shifts for a specific ion in the presence of other elements.

Leuthner, H.; Werth, G.

2013-10-01

272

Testing Positive versus Negative Claims: A Preliminary Investigation of the Role of Cover Story on the Assessment of Experimental Design Skills. CSE Technical Report.  

ERIC Educational Resources Information Center

This paper presents results from a preliminary investigation in which researchers manipulated the cover story of an open-ended assessment that required students to design an experiment. Participants were 27 sixth graders from a culturally diverse urban school. In one version of the cover story, students were asked to design an experiment to test a

Zimmerman, Corinne; Glaser, Robert

273

Preliminary investigation of the biomechanics of internal fixation of sagittal split osteotomies with miniplates using a newly designed in vitro testing model  

Microsoft Academic Search

Purpose: This article reports a preliminary study undertaken to investigate the biomechanics of internal fixation systems for sagittal split ramus osteotomy of the mandible with advancement, using a newly designed 3-point bovine rib testing model. Materials and Methods: After 1 of 5 different miniplates internal fixation systems was placed, a vertical load was applied just below the superior border of

Jerrold E. A Armstrong; Henry J Lapointe; Nicolas J. V Hogg; Alvin D Kwok

2001-01-01

274

Computer-Based Reading Programs: A Preliminary Investigation of Two Parent Implemented Programs with Students At-Risk for Reading Failure  

ERIC Educational Resources Information Center

|In 2000, National Reading Panelists (NRP) reported that computer delivered reading instruction has potential for promoting the reading skills of students at-risk for reading failure. However, panelists also noted a scarcity of data present in the literature on the effects of computer-based reading instruction. This preliminary investigation

Pindiprolu, Sekhar S.; Forbush, David

2009-01-01

275

Game-Based Cognitive-Behavioral Therapy (GB-CBT) Group Program for Children Who Have Experienced Sexual Abuse: A Preliminary Investigation  

ERIC Educational Resources Information Center

This preliminary investigation examined the efficacy of a game-based cognitive-behavioral therapy group program for elementary school-aged children who have experienced sexual abuse. Treatment aimed to improve: (a) internalizing symptoms, (b) externalizing behaviors, (c) sexually inappropriate behaviors, (d) social skills deficits, (e) self-esteem

Misurell, Justin R.; Springer, Craig; Tryon, Warren W.

2011-01-01

276

Game-Based Cognitive-Behavioral Therapy (GB-CBT) Group Program for Children Who Have Experienced Sexual Abuse: A Preliminary Investigation  

ERIC Educational Resources Information Center

|This preliminary investigation examined the efficacy of a game-based cognitive-behavioral therapy group program for elementary school-aged children who have experienced sexual abuse. Treatment aimed to improve: (a) internalizing symptoms, (b) externalizing behaviors, (c) sexually inappropriate behaviors, (d) social skills deficits, (e)

Misurell, Justin R.; Springer, Craig; Tryon, Warren W.

2011-01-01

277

Preliminary investigation of using volatile organic compounds from human expired air, blood and urine for locating entrapped people in earthquakes.  

PubMed

A preliminary investigation on the possibility of using volatile organic compounds (VOCs) determination of expired air, blood and urine, for the early location of entrapped people in earthquakes, has been carried out. A group of 15 healthy subjects has been sampled. The identification of a common "core" of substances might provide indications of human presence that can be used for the development of a real time field analytical method for the on site detection of entrapped people. Expired air samples have been analyzed by thermal desorption GC/MS and VOCs from blood and urine by headspace SPME-GC/MS. Acetone was the only compound found common in all three matrices. Isoprene was found in both expired air and blood samples. Acetone and isoprene along with a number of saturated hydrocarbons were among the major constituents identified in expired air analysis. Various ketones (2-pentanone, 4-heptanone, 2-butanone) were also determined over urine specimens. Using the techniques and methods of field analytical chemistry and technology appears to be the proper approach for applying the results of the present study in real situations. PMID:15996539

Statheropoulos, M; Sianos, E; Agapiou, A; Georgiadou, A; Pappa, A; Tzamtzis, N; Giotaki, H; Papageorgiou, C; Kolostoumbis, D

2005-08-01

278

A preliminary investigation of within-year growth patterns in reading and mathematics curriculum-based measures.  

PubMed

This study examined patterns of growth across benchmark assessments for curriculum-based measures (CBM) over 2 academic years, with the twofold purpose of replicating earlier findings of growth patterns on R-CBM and conducting a preliminary investigation of growth patterns on M-CBM and CBM-Maze. The sample included 898 cases from 3rd through 5th grade over 2 academic years from one elementary school in the rural Midwest. All students participated in tri-annual benchmark assessments in which they were administered R-CBM, CBM-Maze, and M-CBM. Repeated measures analysis of variance was used to examine patterns of growth for all three measures. Students demonstrated greater R-CBM weekly growth during winter-to-spring than fall-to-winter across grade levels. Patterns for CBM-Maze and M-CBM were somewhat inconsistent across school years and grade levels. Results are discussed in terms of contextual variables that may impact within-year growth patterns and technical characteristics of CBM slopes. PMID:19217437

Graney, Suzanne B; Missall, Kristen N; Martnez, Rebecca S; Bergstrom, Melissa

2009-01-29

279

A Preliminary Experimental Investigation of the Overland Behavior of the JEFF-B Amphibious Assault Landing Craft.  

National Technical Information Service (NTIS)

A series of preliminary experiments performed to evaluate the overland behavior of the Amphibious Assault Landing Craft Model designated as the JEFF-B are described. The experiments were designed to establish design criteria for a complete overland test p...

D. D. Moran T. M. Pemberton K. S. Knight

1975-01-01

280

RP-HPLC analysis of the phenolic compounds of plant extracts. investigation of their antioxidant capacity and antimicrobial activity.  

PubMed

Extracts of aromatic plants of Greek origin were examined as potential sources of phenolic compounds. RP-HPLC with UV detection was employed for the identification and quantification of the phenolic antioxidants, present in methanolic extracts. The most abundant phenolic acids were ferulic acid (1.1-280 mg/100 g of dry sample) and caffeic acid (1.2-60 mg/100 g of dry sample). (+)-Catechin and quercetin were the most abundant flavonoids. Apigenin and luteolin were detected in high amounts in Menta pulegium and Thymus vulgaris, respectively. The antioxidant capacity was determined, in dried ground plants and in their methanol extracts, with the Rancimat test using sunflower oil as substrate. Both pulverized plants and extracts showed antioxidant capacity. Total phenolic content in the extracts was determined spectrometrically according to the Folin-Ciocalteu assay and ranged from 1 to 21 mg of gallic acid/100 g of dry sample. Antimicrobial activity of the extracts against selected microbes was also conducted in this study. PMID:15713039

Proestos, C; Chorianopoulos, N; Nychas, G-J E; Komaitis, M

2005-02-23

281

Investigating short-term exposure to electromagnetic fields on reproductive capacity of invertebrates in the field situation.  

PubMed

Abstract Organisms are exposed to electromagnetic fields from the introduction of wireless networks that send information all over the world. In this study we examined the impact of exposure to the fields from mobile phone base stations (GSM 900?MHz) on the reproductive capacity of small, virgin, invertebrates. A field experiment was performed exposing four different invertebrate species at different distances from a radiofrequency electromagnetic fields (RF EMF) transmitter for a 48-h period. The control groups were isolated from EMF exposure by use of Faraday cages. The response variables as measured in the laboratory were fecundity and number of offspring. Results showed that distance was not an adequate proxy to explain dose-response regressions. No significant impact of the exposure matrices, measures of central tendency and temporal variability of EMF, on reproductive endpoints was found. Finding no impact on reproductive capacity does not fully exclude the existence of EMF impact, since mechanistically models hypothesizing non-thermal-induced biological effects from RF exposure are still to be developed. The exposure to RF EMF is ubiquitous and is still increasing rapidly over large areas. We plea for more attention toward the possible impacts of EMF on biodiversity. PMID:23781930

Vijver, Martina G; Bolte, John F B; Evans, Tracy R; Tamis, Wil L M; Peijnenburg, Willie J G M; Musters, C J M; de Snoo, Geert R

2013-06-19

282

Preliminary investigation of the effects of sea-level rise on groundwater levels in New Haven, Connecticut  

USGS Publications Warehouse

Global sea level rose about 0.56 feet (ft) (170 millimeters (mm)) during the 20th century. Since the 1960s, sea level has risen at Bridgeport, Connecticut, about 0.38 ft (115 mm), at a rate of 0.008 ft (2.56 mm + or - 0.58 mm) per year. With regional subsidence, and with predicted global climate change, sea level is expected to continue to rise along the northeast coast of the United States through the 21st century. Increasing sea levels will cause groundwater levels in coastal areas to rise in order to adjust to the new conditions. Some regional climate models predict wetter climate in the northeastern United States under some scenarios. Scenarios for the resulting higher groundwater levels have the potential to inundate underground infrastructure in lowlying coastal cities. New Haven is a coastal city in Connecticut surrounded and bisected by tidally affected waters. Monitoring of water levels in wells in New Haven from August 2009 to July 2010 indicates the complex effects of urban influence on groundwater levels. The response of groundwater levels to recharge and season varied considerably from well to well. Groundwater temperatures varied seasonally, but were warmer than what was typical for Connecticut, and they seem to reflect the influence of the urban setting, including the effects of conduits for underground utilities. Specific conductance was elevated in many of the wells, indicating the influence of urban activities or seawater in Long Island Sound. A preliminary steady-state model of groundwater flow for part of New Haven was constructed using MODFLOW to simulate current groundwater levels (2009-2010) and future groundwater levels based on scenarios with a rise of 3 ft (0.91 meters (m)) in sea level, which is predicted for the end of the 21st century. An additional simulation was run assuming a 3-ft rise in sea level combined with a 12-percent increase in groundwater recharge. The model was constructed from existing hydrogeologic information for the New Haven area and from new information on groundwater levels collected during October 2009-June 2010. For the scenario with a 3-ft rise in sea level and no increase in recharge, simulated groundwater levels near the coast rose 3 ft; this increased water level tapered off toward a discharge area at the only nontidal stream in the study area. Simulated stream discharge increased at the nontidal stream because of the increased gradient. Although groundwater levels rose, the simulated difference between the groundwater levels in the aquifer and the increased sea level declined, indicating that the depth to the interface between freshwater and saltwater may possibly decline. Simulated water levels were affected by rise in sea level even in areas where the water table was at 17-24 ft (5.2-7.3 m) above current (2011) sea level. For the scenario with increased recharge, simulated groundwater levels were as much as an additional foot higher at some locations in the study area. The results of this preliminary investigation indicate that groundwater levels in coastal areas can be expected to rise and may rise higher if groundwater recharge also increases. This finding has implications for the disposal of stormwater through infiltration, a low-impact development practice designed to improve water quality and reduce overland peak discharge. Other implications include increased risk of basement flooding and increased groundwater seepage into underground sewer pipes and utility corridors in some areas. These implications will present engineering challenges to New Haven and Yale University. The preliminary model developed for this study can be the starting point for further simulation of future alternative scenarios for sea-level rise and recharge. Further simulations could identify those areas of New Haven where infrastructure may be at greatest risk from rising levels of groundwater. The simulations described in this report have limitations due to the preliminary scope of the work. Approaches to improve simulations include but are not limited to incorporating: * The variable

Bjerklie, David M.; Mullaney, John R.; Stone, Janet R.; Skinner, Brian J.; Ramlow, Matthew A.

2012-01-01

283

Preliminary on the isotope hydrology investigations at the Nevada test site: Hydrologic resources management program; FY 1992--1993  

SciTech Connect

A comprehensive isotope data base of the NTS groundwaters collected during FY 92-93 is presented with preliminary interpretations. Multiple samples were collected from over 30 sites on pumped wells and open-holes by wireline bailing. Field water level measurements indicate essentially a bimodal distribution separated by water levels at higher elevations (e.g. Pahute Mesa) from water levels of lower elevations (e.g. Yucca and Frenchman Flats). Down hole temperature measurements have confirmed anomalous temperature gradients in the eastern Yucca Flat area and on Pahute Mesa, where horizontal temperature gradients up to 0.33{degrees}F/100ft are found. Consistent with previous reports by others, the major ion geochemistry of the NTS groundwater are dominated by Na-K-HCO{sub 3} and Ca-Mg-HCO{sub 3} water types, where the Na-rich water appears to be related to dissolution in the volcanic tuffs and the Ca-rich water to the Paleozoic carbonates. Increases in dissolved Si also seems to be indicative of groundwater that resides in the volcanic tuffs. Processes controlling the Na/Ca ratios are complex and may include ion exchange reactions with clays, evaporative concentration in the vadose zone, and lithological heterogeneities in addition to simple differential dissolution between the volcanic tuffs and the Paleozoic carbonates. Apparent {sup 14}C ages range between 4000 and 38,000 years for groundwaters at the NTS. The uncertainty is large for exact age determinations at this time. The {sup 14}C abundance decreases with increased dissolved HCO{sub 3}, and {sup 13}C suggests dissolution of the ``dead`` Paleozoic carbonates significantly influence the ages, but more work is needed to investigate the influence of vadose zone carbonate.

Davisson, M.L.; Kenneally, J.M.; Smith, D.K.; Hudson, G.B.; Nimz, G.J.; Rego, J.H.

1994-01-01

284

Early prediction of water-holding capacity in meat by multivariate vibrational spectroscopy  

Microsoft Academic Search

This study had the dual purpose of (a) investigating the feasibility of measuring fundamental vibrational information in fresh porcine meat using infrared (IR) absorption and Raman scattering, and (b) investigating if the vibrational spectra obtained within 1 h after slaughter contained information about the water-holding capacity (WHC) of the meat. Preliminary studies performed at a research slaughterhouse revealed a high

Dorthe Kjr Pedersen; Sophie Morel; Henrik Jrgen Andersen; Sren Balling Engelsen

2003-01-01

285

A Novel Physiological Investigation of the Functional Residual Capacity by the Bias Flow Nitrogen Washout Technique in Infants  

PubMed Central

Summary The dynamic functional residual capacity (FRCdyn), the lung volume most routinely measured in infants, is an unreliable volume landmark. In addition to the FRCdyn, we measured the (passive) static FRC (FRCst) by inducing a brief post-hyperventilation apnea (PHA) in 33 healthy infants aged 7.4127.2 weeks. A commercial system for nitrogen (N2) washout to measure FRC, and a custom made system to monitor and record flow and airwayopening pressure signals in real-time were used in unison. Infants were manually hyperventilated to induce a PHA. After the last passive expiration, FRCst was estimated by measuring the volume of N2 expired after end-passive expiratory switching of the inspired gas from room air to 100% oxygen during the post-expiratory apneic pause. Repeatable intrasubject FRCst and FRCdyn measurements overlapped in most infants including the younger ones (P = 0.2839). Mean (95% confidence interval [CI]) FRCst was 21.1 (20.022.3), and error-corrected FRCdyn was 21.4 (20.422.4) ml/kg. Mean (washout time [t]) tFRCst was longer than tFRCdyn 60 sec (95% CI 5565) versus 47 sec (95% CI 4351) (P<0.0001). The FRC and washout time were dependent on body length, weight and age. We conclude that the FRCst is not different from the FRCdyn in infants. The FRCst is a reliable volume landmark because the PHA stabilizes the end-expiratory level by potentially abolishing the sedated infants breathing strategies. The FRCst lacks potential sources of errors and disadvantages associated with measuring the FRCdyn. The findings cast significant doubt on the traditional physiology of air trapping in healthy infants lungs.

Morris, Mohy G.

2011-01-01

286

A Preliminary Investigation of the Components of a Curriculum for the Preparation of Master's-Level Addiction Counselors  

ERIC Educational Resources Information Center

|This study identified the preliminary curriculum components for the preparation of graduate-level addiction counselors. A review of the related literature revealed no agreed upon standards for post baccalaureate instruction of addiction counseling. The Delphi method was used to establish curriculum items from a list of 198 previously identified

Whittinghill, David

2006-01-01

287

Preliminary in vitro investigation into the use of alkaline elution assay for the biomonitoring of humans exposed to genotoxic agents  

Microsoft Academic Search

1 This in vitro study was undertaken as a preliminary approach before assessing whether the alkaline elution assay can be applied to peripheral blood lymphocytes (PBL) for the monitoring of humans exposed to genotoxic agents such as polycyclic aromatic hydrocarbons (PAH). We have compared in vitro, with the aid of the alkaline elution assay, the formation and the repair of

Therese Leroy; Dominique Lison; Robert Lauwerys

1995-01-01

288

Reducing cognitive vulnerability to depression: A preliminary investigation of MEmory Specificity Training (MEST) in inpatients with depressive symptomatology  

Microsoft Academic Search

Reduced specificity of autobiographical memory retrieval represents an enduring vulnerability factor for depression. The present study is a preliminary evaluation of a newly developed group-based intervention program to increase specificity of memory retrieval. The MEmory Specificity Training (MEST) was administered on a weekly basis for 4 consecutive weeks to 10 inpatients with depressive symptomatology. Whereas earlier studies found that memory

Filip Raes; J. Mark G. Williams; Dirk Hermans

2009-01-01

289

On the accuracy of conservation managers' beliefs and if they learn fromevidence-based knowledge: A preliminary investigation.  

PubMed

Despite the significant impetus placed on the need for conservation managers to base their decisions on evidence-based findings, few studies have compared the accuracy of "evidence" versus experience-based knowledge. Furthermore we are not aware of any study that has tested the willingness of managers to change their beliefs after being exposed to evidence-based findings. Here, we tested nine managers' beliefs before-and-after being shown findings from an evidence-based study. The questions centered on the effectiveness of 'Working for Water' (WfW) in reducing invasive alien plant cover in two large catchment projects over a seven year period, as well as the managers' forecasts of WfW's effectiveness of reducing invasive alien plant cover, and the factors that underpin its effectiveness. We also assessed the financial cost of implementing the evidence-based assessment. We found that in comparison to the evidence-based findings, the managers underestimated the ineffectiveness of operations in reducing invasive alien plant cover in the one catchment and overestimated the ineffectiveness of the other catchment. All the managers whose estimates differed from the evidence-based findings were willing to change their beliefs. Surprisingly, however, when it came to forecasting WfW's effectiveness in the catchments, all the managers, with the exception of one project manager, were unwilling to reduce their optimistic estimates of the time required to control invasive alien plants from the two catchments. With regard to the drivers of effectiveness, the managers ranked their performance as the most important criterion whereas the data model emphasized variables related to site suitability for alien plant growth. Finally, we showed that it would only cost between 0.33% and 1.67% of the two projects' annual budgets to assess all sites, depending on the frequency of the monitoring. This preliminary investigation highlights how evidence-based findings alone, even if presented and explained to managers, might not result in managers learning and updating their beliefs. PMID:23722171

McConnachie, Matthew M; Cowling, Richard M

2013-05-27

290

Exploring Teachers' Capacity to Reflect on Their Practice: An Investigation into the Development of Mathematical Knowledge for Teaching  

ERIC Educational Resources Information Center

|Although the idea of pedagogical content knowledge (PCK) has been elaborated in numerous studies, there has been little clarification of what constitutes it or research into its development. Furthermore, studies that have investigated PCK, or mathematical knowledge for teaching (MKT) as introduced by Thompson and Thompson, have historically

Courtney, Scott Allen

2010-01-01

291

High-resolution electron microscopy investigation of capacity fade in SnO{sub 2} electrodes for lithium-ion batteries  

SciTech Connect

Nanocrystalline SnO{sub 2} thin films have been cycled electrochemically vs. a lithium electrode. They have shown a reversible capacity of about 400--500 mAh/g over more than 100 cycles. However, a capacity fade usually occurs after a few hundred cycles. A high-resolution electron microscopy (HREM) investigation has shown the decomposition of SnO{sub 2} crystallites into 10 to 50 nm wide tin grains during the first cycle as previously reported. An amorphous phase containing carbon and oxygen has also been detected in the cycled samples. Furthermore, the tin particles are surrounded by an amorphous 5 to 10 nm wide ring made of Sn and O. The size of the tin crystallites formed during the first cycle increases from 40 nm to an average value of 110 nm after 500 cycles. In addition, the structure of the amorphous compound made of Sn and O surrounding the tin particles changes after 500 cycles, suggesting that a beginning of crystallization has occurred. The authors assume that either particle expansion or the formation of this semicrystalline layer is responsible for the capacity fade observed in SnO{sub 2} negative electrodes.

Retoux, R. [Univ. du Maine, Le Mans (France). Lab. des Fluorures; Brousse, T.; Schleich, D.M. [ISITEM, Nantes (France). Lab. de Genie des Materiaux

1999-07-01

292

Allura Red Coloring from India. Investigations Nos. 701-TA-433 (Preliminary) and 731-TA-1029 (Preliminary). Determination and Views of the Commission.  

National Technical Information Service (NTIS)

On the basis of the record developed in the subject investigations, the United States International Trade Commission (Commission) determines, pursuant to section 703(a) of the Tariff Act of 1930 (19 U.S.C. paragraph 1671b(a)) (the Act), that there is no r...

2003-01-01

293

A preliminary investigation of pollution in the River Yamuna, Delhi, India: Metal concentrations in river bank soils and plants  

Microsoft Academic Search

A preliminary study of inorganic elements in the river bank soil and plants from the River Yamuna in Delhi has been carried out. Soil at Okhla, near the Water Works plant has a high zinc content (1,215 g g-1 and this is reflected in the high concentration of zinc (2,029 g g-1) in Eichhornia plants growing in the river at

M. E. Farago; A. Mehra; D. K. Banerjee

1989-01-01

294

Preliminary on the isotope hydrology investigations at the Nevada test site: Hydrologic resources management program; FY 1992--1993  

Microsoft Academic Search

A comprehensive isotope data base of the NTS groundwaters collected during FY 92-93 is presented with preliminary interpretations. Multiple samples were collected from over 30 sites on pumped wells and open-holes by wireline bailing. Field water level measurements indicate essentially a bimodal distribution separated by water levels at higher elevations (e.g. Pahute Mesa) from water levels of lower elevations (e.g.

M. L. Davisson; J. M. Kenneally; D. K. Smith; G. B. Hudson; G. J. Nimz; J. H. Rego

1994-01-01

295

Investigation of surfactant/cosurfactant synergism impact on ibuprofen solubilization capacity and drug release characteristics of nonionic microemulsions.  

PubMed

The current study investigates the performances of the multicomponent mixtures of nonionic surfactants regarding the microemulsion stabilisation, drug solubilization and in vitro drug release kinetic. The primary surfactant was PEG-8 caprylic/capric glycerides (Labrasol). The cosurfactants were commercially available mixtures of octoxynol-12 and polysorbate 20 without or with the addition of PEG-40 hydrogenated castor oil (Solubilisant gamma 2421 and Solubilisant gamma 2429, respectively). The oil phase of microemulsions was isopropyl myristate. Phase behaviour study of the pseudo-ternary systems Labrasol/cosurfactant/oil/water at surfactant-to-cosurfactant weight ratios (K(m)) 40:60, 50:50 and 60:40, revealed a strong synergism in the investigated tensides mixtures for stabilisation of microemulsions containing up to 80% (w/w) of water phase at surfactant +cosurfactant-to-oil weight ratio (SCoS/O) 90:10. Solubilization of a model drug ibuprofen in concentration common for topical application (5%, w/w) was achieved at the water contents below 50% (w/w). Drug free and ibuprofen-loaded microemulsions M1-M6, containing 45% (w/w) of water phase, were prepared and characterized by polarized light microscopy, conductivity, pH, rheological and droplet size measurements. In vitro ibuprofen release kinetics from the microemulsions was investigated using paddle-over-enhancer cell method and compared with the commercial 5% (w/w) ibuprofen hydrogel product (Deep Relief, Mentholatum Company Ltd., USA). The investigated microemulsions were isotropic, low viscous Bingham-type liquids with the pH value (4.70-6.61) suitable for topical application. The different efficiency of the tensides mixtures for microemulsion stabilisation was observed, depending on the cosurfactant type and K(m) value. Solubilisant gamma 2429 as well as higher K(m) (i.e., lower relative content of the cosurfactant) provided higher surfactant/cosurfactant synergism. The drug molecules were predominantly solubilized within the interface film. The amount of drug released from the formulations M3 (10.75%, w/w) and M6 (13.45%, w/w) (K(m) 60:40) was limited in comparison with the reference (22.22%, w/w) and follows the Higuchi model. Microemulsions M2 and M5 (K(m) 50:50) gave zero order drug release pattern and ?15% (w/w) ibuprofen released. The release profiles from microemulsions M1 and M4 (K(m) 40:60) did not fit well with the models used for analysis, although the amounts of ibuprofen released (24.47%, w/w) and 17.99% (w/w), respectively) were comparable to that of the reference hydrogel. The drug release mechanism was related with the surfactant/cosurfactant synergism, thus the lower efficiency of the tensides corresponded to the faster drug release. PMID:22579578

Djekic, Ljiljana; Primorac, Marija; Filipic, Slavica; Agbaba, Danica

2012-05-03

296

Preliminary Investigation of the Role of Cellular Immunity in Estrous Cycle Modulation of Post-Resection Breast Cancer Spread.  

National Technical Information Service (NTIS)

It is proposed to use this breast cancer of C(3)H mice to determine whether or not hormone dependent immunocyte suppression is, in part, responsible for the mammalian fertility cycle modulation of the capacity of the cancer to spread after attempted surgi...

W. J. Hrushesky

1999-01-01

297

Carrying Capacity  

NSDL National Science Digital Library

This lesson helps students understand the notion of carrying capacity as it relates to ecosystems by considering an image of a bucket filled with water, and then filled with an "ecosystem." Students are asked to consider the factors on which carrying capacity is determined, and that a ecosystem's carrying capacity can change when certain variables are also changed.

298

Study of the Binding Capacity of Heparin Functionalized Magnetic Microparticles for Cardiac Lipoprotein Lipase and their Preliminary Evaluation Ex Vivo in Rat Hearts  

NASA Astrophysics Data System (ADS)

Magnetic particles were modified with covalently-bound surface heparin (HEPMag). The amount and activity of bound heparin was investigated with the toluidine blue, APTT, Kinetichrome Anti-IIa and western blot assays. The particles bound 40 ?g/mg (0.42 U/mg) and exhibited excellent anticoagulant activity. However, the activity was 5x less than that of free heparin. The HEPMag particles were then utilized to measure their lipoprotein lipase (LPL) binding potential and compared to commercially available heparin-bound particles (SiMAG-Heparin). HEPMag particles bound 98% LPL compared to 79% for SiMAG-Heparin particles. In addition, the HEPMag particles retained the LPL much better: Upon incubation with 5 U/mL free heparin, HEPMag particles released only 7% of the bound LPL compared to 67% for the SiMAG-Heparin particles. Being able to capture LPL in the heart might be useful for the investigation of the fat acid metabolism in diabetes. Ex vivo retrograde heart perfusion studies in rats with the HEPMag particles showed that LPL could be removed from the coronary lumen. These heparin surface modified parties are thus potential tools to magnetically target the coronary arteries and remove LPL in a selective way.

Schmitt, Veronika; Rodrigues, Brian; Hfeli, Urs O.; Saatchi, Katayoun

2010-12-01

299

Self reported injury patterns among competitive curlers in the United States: a preliminary investigation into the epidemiology of curling injuries  

PubMed Central

Methods: Participants at two curling championship events were asked to complete injury history questionnaires. Results: 76 curlers (39%) participated; 79% of these reported curling related musculoskeletal pain, most commonly involving the knee (54%), back (33%), and shoulder (20%). Sweeping and delivering the stone were most likely to provoke symptoms. Time loss injuries were estimated to occur at a rate of 2 per 1000 athlete exposures. Conclusions: Curling appears to be a relatively safe winter sport. Prospective studies are needed to confirm these preliminary findings and to further define the risk factors for curling related injuries.

Reeser, J; Berg, R

2004-01-01

300

Self-compassion and fear of self-compassion interact to predict response to eating disorders treatment: A preliminary investigation  

Microsoft Academic Search

Gilbert (2005) proposed that the capacity for self-compassion is integral to overcoming shame and psychopathology. We tested this model among 74 individuals with an eating disorder admitted to specialized treatment. Participants completed measures assessing self-compassion, fear of self-compassion, shame, and eating disorder symptoms at admission and every 3 weeks during treatment. At baseline, lower self-compassion and higher fear of self-compassion

Allison C. Kelly; Jacqueline C. Carter; David C. Zuroff; Sahar Borairi

2012-01-01

301

The administration of psilocybin to healthy, hallucinogen-experienced volunteers in a mock-functional magnetic resonance imaging environment: a preliminary investigation of tolerability.  

PubMed

This study sought to assess the tolerability of intravenously administered psilocybin in healthy, hallucinogen-experienced volunteers in a mock-magnetic resonance imaging environment as a preliminary stage to a controlled investigation using functional magnetic resonance imaging to explore the effects of psilocybin on cerebral blood flow and activity. The present pilot study demonstrated that up to 2 mg of psilocybin delivered as a slow intravenous injection produces short-lived but typical drug effects that are psychologically and physiologically well tolerated. With appropriate care, this study supports the viability of functional magnetic resonance imaging work with psilocybin. PMID:20395317

Carhart-Harris, Robin L; Williams, Tim M; Sessa, Ben; Tyacke, Robin J; Rich, Ann S; Feilding, Amanda; Nutt, David J

2010-04-15

302

A preliminary investigation of the effects of giving testimony and learning yogic breathing techniques on battered women's feelings of depression.  

PubMed

Researchers have shown that mood and sense of control over one's life are significantly affected by testimony and other forms of disclosure and that learning to control breathing has positive effects on mood and anxiety. This preliminary experiment tests whether African American and European American abused women who give testimony about their experiences of intimate partner violence and learn how to use yogic breathing techniques have reduced feelings of depression. Results indicate that learning yogic breathing techniques alone and combined with giving testimony significantly reduces feelings of depression. Recasting women as authorities on domestic violence and teaching them how to calm their minds by focusing on yogic breathing may be simple and effective ways to help women take control over their bodies and lives. PMID:18319369

Franzblau, Susan H; Echevarria, Sonia; Smith, Michelle; Van Cantfort, Thomas E

2008-03-04

303

Preliminary investigation of biogenic gas production in Indonesian low rank coals and implications for a renewable energy source  

NASA Astrophysics Data System (ADS)

Indonesia has abundant coal resources at depths suitable to contain substantial volumes of naturally occurring methane, which are currently being explored. Most Indonesian coals are thermally immature, but are composed of hydrogen-rich organic components that are presumed to make them excellent substrates for biogenic methane production. Gas isotope results from pilot wells in South Sumatra, reported in this study, are interpreted to indicate biogenic origins for the methane. Corresponding formation water samples were collected and incubated, and show the presence of indigenous microbial communities capable of producing methane from Indonesian and Australian coal. Although these results are only preliminary, they are promising and support the possibility of Indonesia developing bio renewable energy from coal seams.

Susilawati, Rita; Papendick, Sam L.; Gilcrease, Patrick C.; Esterle, Joan S.; Golding, Suzanne D.; Mares, Tennille E.

2013-11-01

304

Healthcare capacity measurement  

Microsoft Academic Search

Purpose The purpose of this paper is to present findings from an action research intervention in the outpatient department of a National Health Service (NHS) Hospital. It investigates the perceived and actual problems of measuring capacity at a UK hospital. Design\\/methodology\\/approach An action research methodology was adopted: relevant literature on capacity measurement and performance was reviewed; the motivation

David Bamford; Elizabeth Chatziaslan

2009-01-01

305

Coregistration of Ultrasound and Magnetic Resonance Imaging with a Preliminary Investigation of the Spatial Colocalization of VEGFR2 Expression and Tumor Perfusion in a Murine Tumor Model  

PubMed Central

We present an US-MRI coregistration technique and examine its application in a preliminary multi-modal, multi-parametric study in a pre-clinical model of breast cancer. Nine mice were injected with 67NR breast cancer cells and imaged 6 and 9 days later with 4.7T MRI and high frequency US. Tumor volumes from each data set were segmented independently by two investigators and co-registered using an iterative closest point algorithm. In addition to anatomical images, VEGFR2 distribution images from the central tumor slice using VEGFR2-targeted UCA and measurements of perfusion and extravascular-extracellular volume fraction using DCE-MRI were acquired from five mice for multi-parametric coregistration. Parametric maps from each modality were co-registered and examined for spatial correlation. Average registration RMS error was 0.36 mm +/- 0.11 mm, less than approximately two voxels. Segmented volumes were compared between investigators to minimize inter-observer variability; average RMS error was 0.23 mm +/- 0.09 mm. In the preliminary study, VEGFR2-targeted UCA data did not demonstrate direct spatial correlation with MR measures of vascular properties. In summary, a method for accurately co-registering small animal US and MRI has been presented which allows for comparison of quantitative metrics provided by the two modalities.

Loveless, Mary E.; Whisenant, Jennifer G.; Wilson, Kevin; Lyshchik, Andrej; Sinha, Tuhin K.; Gore, John C.; Yankeelov, Thomas E.

2009-01-01

306

Preliminary Listing of Municipal Water Supply Capacities.  

National Technical Information Service (NTIS)

The publication is a current listing of available data on water supply facilities of all U.S. communities with a serviced population of over 2,000. The tables presented are essentially a first-cut consolidation of available facility data. The data are pre...

1976-01-01

307

Capacity Value of Solar Power  

SciTech Connect

Evaluating the capacity value of renewable energy sources can pose significant challenges due to their variable and uncertain nature. In this paper the capacity value of solar power is investigated. Solar capacity value metrics and their associated calculation methodologies are reviewed and several solar capacity studies are summarized. The differences between wind and solar power are examined, the economic importance of solar capacity value is discussed and other assessments and recommendations are presented.

Duignan, Roisin; Dent, Chris; Mills, Andrew; Samaan, Nader A.; Milligan, Michael; Keane, Andrew; O'Malley, Mark

2012-11-10

308

Preliminary analyses of the excavation investigation experiments proposed for the exploratory shaft at Yucca Mountain, Nevada Test Site  

SciTech Connect

The Yucca Mountain Project (YMP), is examining the feasibility of siting a repository for high-level nuclear waste at Yucca Mountain on and adjacent to the Nevada Test Site. Three excavation experiments, Shaft Convergence, Demonstration Breakout Rooms, and Sequential Drift Mining, will provide some of the data required to (1) assess the mechanical behavior of repository-size openings and (2) validate numerical models that may be used in the repository design process. In this report, the results of preliminary analyses of the three excavation experiments are presented. The major objective of these analyses was to provide some guidance to the experiment planners regarding the expected displacements and stresses near the experimental drifts so that selection and placement of instrumentation could be optimized. Further, successful completion of these analyses demonstrates the ability to model the experiments, given the simplifying assumptions presented. Limitations of the analyses performed and the experiments as currently designed are also discussed. Finally, the results of these analyses provided some indication of how the variation of some key geometric and material parameters would affect the predicted results. Once the experiment design is finalized and site-specific material data are collected, pretest predictive analyses will be conducted using the mechanical and material models that require validation. 15 refs., 123 figs., 13 tabs.

Costin, L.S.; Bauer, S.J.

1988-12-01

309

A coupled mechanical-hydrological investigation of crystalline rocks: Annual technical progress report, proposed test matrix, and preliminary results  

SciTech Connect

This report reviews the Fracture Flow Behavior in Rock Study being performed at the Pacific Northwest Laboratory. The study's objective is to determine the feasibility of predicting mechanical-hydrological behavior of natural rock fractures by accurately characterizing fracture surface topography and mineralization. A laboratory-scale facility is currently being used to ensure optimum control of variables. Devising a technique to study small-scale samples is the first step to understanding the complex coupled processes encountered in geomechanics and hydrology. The major accomplishments during fiscal year 1987 were initial development of the innovative testing method, identification of appropriate specimens, substantial renovation to the facility, completion of several sets of experiments, and procurement of hardware components for a laser-imaging device used to characterize fracture surfaces. A complete set of preliminary results and findings is presented in this report. These results, gathered from a basalt core with a natural fracture, have demonstrated that the methodology is valid, and definite trends in the data are readily apparent. 10 refs., 14 figs., 1 tab.

Bastian, R.J.; Voss, C.F.; Apted, M.J.; Shotwell, L.R.

1988-02-01

310

Preliminary field investigations and findings of thermokarst evolution and sediment transport in a sub-arctic watershed  

NASA Astrophysics Data System (ADS)

The rapid thermokarst development in the Caribou Poker Creeks Research Watershed is a relatively new feature in this predominantly discontinuous permafrost region. The thermokarst was initiated by permafrost degradation and precipitated primarily by the rain event that occurred in July 2003. Initial results of a field study on the thermokarst evolution and sediment transport are presented here. The rapid morphologic changes have been observed by comparing topographical surveys carried out during two consecutive summer seasons. Groundwater flow from ground ice thaw coupled with summer precipitation has led to an enormous amount of sediment being transported from the upstream end of the thermokarst to a considerable distance downstream of the site. However, liquid discharge measurements at the input and downstream locations show a loss in the discharge, suggesting a complex network for the transport of water and sediment within the active layer. Preliminary data on suspended sediment concentration indicate that higher sediment transport occurs during and after rainfall events with infilling of the thermokarst by sedimentation to a depth of 18 inches in the downstream reaches. The high sediment transport is a clear indication that erosion of the area is an active and ongoing process. It shows the extreme sensitivity of permafrost to climate induced surface modifications.

Kodial, P. S.; Toniolo, H. A.; Hinzman, L. D.; Yoshikawa, K.

2004-12-01

311

A preliminary spectroscopic investigation on the molecular interaction of metal-diphenylthiocarbazone complex with cellulose biopolymer and its application  

NASA Astrophysics Data System (ADS)

Biopolymer adsorbents are versatile in their application for removal of heavy metals. The present work is focused towards the preliminary study of the interaction of diphenylthiocarbazone (DTZ) complex of chromium(VI) in acidic medium with cellulose biopolymer. Chromium-DTZ complex could be quantitatively adsorbed on a cellulose column in the pH range 1.0-2.5 and the effect of various experimental parameters such as stability of the column and the complex, column breakthrough volume, and interfering ions have been studied in detail. The probable mechanism of adsorption of complex on the cellulose biopolymer was corroborated using Fourier transform infra-red spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and solid state 13C nuclear magnetic resonance techniques (CP-MAS). The pores formed due to the hydrogen bond between the cellulose layers and then the ensuing occupation of the complex between these layers and on the surface of the biopolymer layer through electrostatic attractive force and ? interaction of aromatic ring with cellulose are expected to play a vital role in the interaction. The cellulose column could be regenerated using environmentally benign polyethylene glycol-400 (PEG-400) in acidic medium. The cellulose biosorbent has been successfully tested to study the removal of chromium as its dithizone complex from synthetic and real waste water samples.

Kalidhasan, S.; KrishnaKumar, A. S.; Rajesh, Vidya; Rajesh, N.

2011-09-01

312

Self-regulation abilities in children with severe traumatic brain injury: a preliminary investigation of naturalistic action.  

PubMed

Research suggests that the occurrence of a traumatic brain injury (TBI) in childhood may disrupt self-regulation abilities, putting children at risk for difficulty on everyday tasks requiring self-regulation throughout their development. In the current exploratory study, a novel age-appropriate task assessed the ability to perform three familiar tasks using real objects while adhering to specific rules. Performance of children (ages 8-16) with severe TBI (n = 11) on the naturalistic task was compared to that of typically developing children (n = 21), including measures of the amount/types of errors and number of broken rules. The children with TBI exhibited significantly increased use of distractor objects in place of target objects as compared to the non-injured children. Additionally, children with TBI demonstrated trends of increased breaking of rules during the task and failure to include necessary steps. The preliminary results support the theory that children with severe TBI possess inefficient supervisory processes of self-regulation, corresponding to a decreased ability to carry out goal-based top-down processing. They may instead exhibit a bias towards a bottom-up approach, depending primarily on environmental cues such as the objects present to guide their actions, thus impeding self-regulation abilities. PMID:19127000

Cook, Lori G; Chapman, Sandra B; Levin, Harvey S

2008-01-01

313

A Preliminary Investigation of the Effects of Experimentally-Induced Mindfulness on Emotional Responding to Film Clips  

PubMed Central

Despite encouraging preliminary findings regarding the efficacy of mindfulness and acceptance-based treatments for a range of psychological presentations, we have yet to elucidate mechanisms of action within these treatments. One mechanism through which mindfulness may reduce psychological symptoms and promote functioning is through enhancing emotional responding and regulation. In this study, we used multimodal assessment to examine the effects of a brief mindfulness intervention in a laboratory setting on emotional experiences and regulation in response to distressing, positive, and affectively mixed film clips. Although there were no condition (mindfulness versus control) effects on reports of difficulties in emotional response or regulation after the distressing film clip, participants in the mindfulness condition reported significantly greater positive affect in response to the positive film. Additionally, participants in the mindfulness condition reported more adaptive regulation (approaching significance, medium to large effect size) in response to the affectively mixed clip, and also reported significantly less negative affect immediately following this clip, although not after a recovery period. No significant differences emerged between conditions on physiological measures (skin conductance and heart rate) throughout the study.

Erisman, Shannon M.; Roemer, Lizabeth

2010-01-01

314

Psychometric properties of the functions and addictive features scales of the Ottawa Self-Injury Inventory: A preliminary investigation using a university sample.  

PubMed

Nonsuicidal self-injury (NSSI) is an issue primarily of concern in adolescents and young adults. Thus far, no single NSSI self-report measure offers a fully comprehensive assessment of NSSI, particularly including measurement of both its functions and potential addictive features. The Ottawa Self-Injury Inventory (OSI) permits simultaneous assessment of both these characteristics; the current study examined the psychometric properties of this measure in a sample of 149 young adults in a university student sample (82.6% girls, Mage = 19.43 years). Exploratory factor analyses revealed 4 functions factors (internal emotion regulation, social influence, external emotion regulation, and sensation seeking) and a single addictive features factor. Convergent evidence for the functions factor scores was demonstrated through significant correlations with an existing measure of NSSI functions and indicators of psychological well-being, risky behaviors, and context and frequency of NSSI behaviors. Convergent evidence was also shown for the addictive features scores, through associations with NSSI frequency, feeling relieved following NSSI, and inability to resist NSSI urges. Additional comment is made regarding the potential for addictive features of NSSI to be both negatively and positively reinforcing. Results show preliminary psychometric support for the OSI as a valid and reliable assessment tool to be used in both research and clinical contexts. The OSI can provide important information for case formulation and treatment planning, given the comprehensive and all-inclusive nature of its assessment capacities. (PsycINFO Database Record (c) 2013 APA, all rights reserved). PMID:23647037

Martin, Jodi; Cloutier, Paula F; Levesque, Christine; Bureau, Jean-Franois; Lafontaine, Marie-France; Nixon, Mary K

2013-05-06

315

Bearing Capacity of Soils.  

National Technical Information Service (NTIS)

This manual presents guidelines for calculation of the bearing capacity of soil under shallow and deep foundations supporting various types of structures and embankments. This information is generally applicable to foundation investigation and design cond...

1992-01-01

316

Neurofeedback for Adult Attention-Deficit\\/Hyperactivity Disorder: Investigation of Slow Cortical Potential NeurofeedbackPreliminary Results  

Microsoft Academic Search

Attention deficit\\/hyperactivity disorder (ADHD) is characterized by symptoms of inattention, impulsivity, and hyperactivity. Compared to ADHD in children, only a few studies have investigated ADHD in an adult population, and even less have investigated new forms of treatment such as neurofeedback. Neurofeedback has been applied effectively in various areas, especially in the treatment of children with ADHD, and symptom improvements

Kerstin Mayer; Sarah N. Wyckoff; Ulrike Schulz; Ute Strehl

2012-01-01

317

A preliminary investigation on the interaction between sol-gel immobilized glucose oxidase and freely diffusing glucose by means of two-photon microscopy  

NASA Astrophysics Data System (ADS)

To study immobilized protein interactions with dissolved substrates is a very important topic both from a fundamental and technological standpoint. In the present report we illustrate the preliminary results obtained on sol-gel immobilized glucose oxidase (GOD) using a standard de-scanned two-photon microscope based on a modified confocal scanhead with internal detectors and a Ti:sapphire laser as a source. Data acquisition conditions were preliminary defined using functionalized beads of different dimensions. Various sol-gel supports were then investigated by monitoring endogeneous fluorescence due to the flavoadenine (FAD) molecules, present in GOD. Linear absorption and fluorescence spectroscopy along with Fourier Transform Infrared microscopy were employed for a full-optical characterization of the samples. The results show that GOD immobilization processes can be successfully monitored in some cases and also the interaction with glucose could be studied by this approach. This assessment holds potentials to better understand the characteristic of immobilized enzymes biocatalysis and to develop new biosensing schemes.

Delfino, I.; Portaccio, M.; De Rosa, M.; Lepore, M.

2013-02-01

318

Preliminary investigation on a primary energy saving heat supply system for the residential district "Maria Lindenhof" in Dorsten, West Germany  

NASA Astrophysics Data System (ADS)

Ways and means to operate a heating station by gas motor-driven heat pumps, using river water as heat source are investigated. The economic viability of the scheme is considered. A comparison with conventional technologies clearly shows the feasibility and effectiveness of this application, and at the same time supplies guidelines for design and dimensioning. Because of possible energy saving, the present investigation supports the realization of the project.

Bechtel, A.; Berlinghoff, K.; Grossmann, H.; Kaschube, H.; Reinmuth, F.

1980-12-01

319

Controlled-source seismic investigations of the crustal structure beneath Erebus volcano and Ross Island, Antarctica: Preliminary Results  

NASA Astrophysics Data System (ADS)

During the 2008-09 Austral summer field season we undertook a controlled-source seismic experiment (Tomo-Erebus, TE) to examine the shallow magmatic system beneath the active Erebus volcano (TE-3D) and the crustal structure beneath Ross Island. Here we report on the TE-2D component, which was designed to produce a two-dimensional P-wave velocity model along an east-west profile across Ross Island. Marine geophysical observations near Ross Island have identified the north-south trending Terror Rift within the older and broader Victoria Land Basin, which are a component of the intraplate West Antarctic Rift System. Mount Erebus and Ross Island are circumstantially associated with the Terror Rift and its thin (~20 km) crust. The nature, extent and role of the Terror Rift in controlling the evolution of Ross Island volcanism and the on-going eruptive activity of Erebus volcano are unknown. In TE-2D, we deployed 21 seismic recorders (Ref Tek 130) with three-component 4.5 Hz geophones (Sercel L-28-3D) along a 90-km east-west line between Capes Royds and Crozier. These were supplemented by 79 similar instruments deployed for the high-resolution TE-3D experiment within a 3 x 3 km grid around the summit crater of Erebus, an array of 8 permanent short period and broadband sensors used to monitor the activity of Erebus and 23 three-component sensors (Guralp CMG-40T, 30s-100 Hz) positioned around the flanks and summit of Erebus. Fifteen chemical sources were loaded in holes drilled about 15 m deep in the snow and ice. The size of these shots ranged from 75 to 600 kg of ANFO with the largest shots at the ends of the profile. An additional shot was detonated in the sea (McMurdo Sound) using 200 kg of dynamite. Due to the rugged terrain, short field seasons and large area to be covered, the seismometer spacing along the TE-2D profile is quite large (~ 5 km spacing), resulting in poor near-surface data resolution. However, the data have a high signal to noise ratio with clear first arrivals and wide-angle reflections across the array. We will present a preliminary P-wave velocity model of the TE-2D data to constrain the middle to lower crust and upper mantle beneath Ross Island.

Maraj, S.; Kyle, P. R.; Zandomeneghi, D.; Knox, H. A.; Aster, R. C.; Snelson, C. M.; Miller, P. E.; Kaip, G. M.

2009-12-01

320

Our Nation's Schools--A Report Card: "A" in School Violence and Vandalism. Preliminary Report of the Subcommittee to Investigate Juvenile Delinquency, Based on Investigations, 1971-1975.  

ERIC Educational Resources Information Center

|Since 1971 the Senate Subcommittee to Investigate Juvenile Delinquency has held 55 days of hearings and received testimony from 419 witnesses on topics including the extent and causes of drug abuse, runaway youth, school dropouts, and the confinement of juveniles in detention and correctional facilities. A questionnaire designed to obtain

Bayh, Birch

321

Preliminary Investigation on a Primary Energy Saving Heat Supply System for the Residential District 'Maria Lindenhof' in Dorsten, West Germany.  

National Technical Information Service (NTIS)

Ways and means to operate a heating station by gas motor-driven heat pumps, using river water as heat source are investigated. The economic viability of the scheme is considered. A comparison with conventional technologies clearly shows the feasibility an...

A. Bechtel K. Berlinghoff H. Grossmann H. Kaschube F. Reinmuth

1980-01-01

322

Preliminary Investigation of Prebreakdown Phenomena and Chemical Reactions Using a Pulsed High-Voltage Discharge in Water  

Microsoft Academic Search

Prebreakdown phenomena in water were investigated for point-plane geometries using high-voltage pulses. Spot discharges, filamentary magenta streamers, isolated microdischarges, and microbubbles were observed and photographed. Emission spectra were obtained using a prism spectrograph. Maximum streamer lengths were determined as a function of applied voltage, pulsewidth (decay constant), and water conductivity. The bubbling of gas through the underwater discharge resulted in

J. Sidney Clements; Masayuki Sato; Robert H. Davis

1987-01-01

323

The role of religiousness in anxiety, depression, and happiness in a Jewish community sample: A preliminary investigation  

Microsoft Academic Search

Although social scientists have convincingly demonstrated relationships between religious beliefs\\/practices and mental health, almost none of the empirical findings or related theory apply specifically to Jews. To address this limitation, we investigated the role of Jewish religiousness in anxiety, depression, and happiness, in a large Jewish community sample (n = 565). Several facets of global Jewish religiousness were examined, as

David H. Rosmarin; Kenneth I. Pargament; Annette Mahoney

2009-01-01

324

A Preliminary Study to Investigate the Influence of Different Teaching Styles on Pupils' Goal Orientations in Physical Education  

ERIC Educational Resources Information Center

Via a Greek sample of 75 sixth grade pupils, the influences of teaching styles on pupils' goal orientations were investigated. LAPOPECQ was distributed twice, before and after the application of the teaching programme consisting of four teaching style groups. Employing a paired samples t test, the results indicated significant pre-to-post changes.

Salvara, Marina I.; Jess, Mike; Abbott, Angela; Bognar, Jozsef

2006-01-01

325

Ni-Resist Piston Inserts from Argentina and Korea, Investigation Nos. 701-ta-460-461 (Preliminary).  

National Technical Information Service (NTIS)

On the basis of the record1 developed in the subject investigations, the United States International Trade Commission (Commission) determines, pursuant to section 703(a) of the Tariff Act of 1930 (19 U.S.C. Section 1671b(a)) (the Act), that there is a rea...

2009-01-01

326

A Preliminary Investigation of Associations between Disorders of Behavior and Language in Children with Chronic Otitis Media.  

ERIC Educational Resources Information Center

|The relationship between language and behavior disorders was investigated. The teacher and parents of 12 children in a special public preschool for children with documented chronic otitis media and language disorders completed the Louisville Behavior Checklist. Most deviant behavior was reported on scales measuring cognitive and

Funk, Jeanne B.; Ruppert, Elizabeth S.

1986-01-01

327

Preliminary investigation of a sealed, remotely activated silver--zinc battery. Final report. [> 35 wh\\/lb  

Microsoft Academic Search

Methods necessary to provide a remotely activated, silver--zinc battery capable of an extended activated stand while in a sealed condition were investigated. These requirements were to be accomplished in a battery package demonstrating an energy density of at least 35 watt-hours per pound. Several methods of gas suppression were considered in view of the primary nature of this unit and

Wheat

1977-01-01

328

Optimizing Speech Production in the Ventilator-Assisted Individual Following Cervical Spinal Cord Injury: A Preliminary Investigation  

ERIC Educational Resources Information Center

|Background: Mechanical ventilation is commonly used during the acute management of cervical spinal cord injury, and is required on an ongoing basis in the majority of patients with injuries at or above C3. However, to date there have been limited systematic investigations of the options available to improve speech while ventilator-assisted

MacBean, Naomi; Ward, Elizabeth; Murdoch, Bruce; Cahill, Louise; Solley, Maura; Geraghty, Timothy; Hukins, Craig

2009-01-01

329

Alterations in autonomic tone during trauma exposure using eye movement desensitization and reprocessing (EMDR)Results of a preliminary investigation  

Microsoft Academic Search

EMDR combines stimuli that evoke divided attention e.g. eye movements with exposure to traumatic memories. Our objective was to investigate psycho-physiological correlates of EMDR during treatment sessions. A total of 55 treatment sessions from 10 patients with PTSD was monitored applying impedance cardiography. Onset of every stimulation\\/exposure period (n=811) was marked and effects within and across stimulation sets

Martin Sack; Wolfgang Lempa; Adrian Steinmetz; Friedhelm Lamprecht; Arne Hofmann

2008-01-01

330

The evacuation of British children during World War II: A preliminary investigation into the long-term psychological effects  

Microsoft Academic Search

The authors used attachment theory to hypothesize about the possible long-term psychological effects of evacuation during World War II, focusing on children who were evacuated unaccompanied by their parents. The study aimed to establish whether this experience had long-term effects on psychological well-being, and to investigate mediating and moderating factors. The study utilized a retrospective non-randomized design, comparing 169 former

D. Foster; S. Davies; H. Steele

2003-01-01

331

A preliminary investigation of the relationships between employee motivation\\/vision, service learning, and perceived service quality  

Microsoft Academic Search

Most experts agree that a learning organization whose employees have a clear vision of the importance of service quality and are motivated to provide that quality will achieve superior service quality. We develop a theoretical framework and conduct a cross-sectional empirical study to investigate the inter-relationships among these constructs. The results indicate that higher levels of both employees motivation\\/vision and

Julie M. Hays; Arthur V. Hill

2001-01-01

332

A preliminary investigation into the physical and chemical properties of biomass ashes used as aggregate fillers for bituminous mixtures.  

PubMed

Fly and bottom ashes are the main by-products arising from the combustion of solid biomass. Since the production of energy from this source is increasing, the processing and disposal of the resulting ashes has become an environmental and economic issue. Such ashes are of interest as a construction material because they are composed of very fine particles similar to fillers normally employed in bituminous and cementitious mixtures. This research investigates the potential use of ash from biomass as filler in bituminous mixtures. The morphological, physical and chemical characteristics of 21 different ashes and two traditional fillers (calcium carbonate and "recovered" plant filler) were evaluated and discussed. Leaching tests, performed in order to quantify the release of pollutants, revealed that five ashes do not comply with the Italian environmental re-use limits. Experimental results show a wide range of values for almost all the investigated properties and a low correlation with biomass type in terms of origin and chemical composition. Furthermore, sieving and milling processes were found to improve the properties of the raw material in terms of grading and sample porosity. The effectiveness of these treatments and the low content of organic matter and harmful fines suggest that most of the biomass ashes investigated may be regarded as potential replacements for natural filler in bituminous mixtures. PMID:23790672

Melotti, Roberto; Santagata, Ezio; Bassani, Marco; Salvo, Milena; Rizzo, Stefano

2013-06-19

333

Preliminary data report of investigations conducted at the Salmon Site, Lamar County, Mississippi. Nevada Environmental Restoration Project  

SciTech Connect

The US Department of Energy (DOE) conducted ecological studies at the Salmon Site (SS), Lamar County, Mississippi, from the middle of June 1992 to the end of April 1993. The studies are part of the Remedial Investigation and Feasibility Study (RI/FS) being conducted by the DOE. The RI/FS is the methodology under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended by the Superfund Amendments and Reauthorization Act of 1986 (CERCLA/SARA) for evaluating hazardous waste sites on the National Priorities List (NPL). The Salmon Site is not listed on the NPL but DOE has voluntarily elected to conduct the evaluation of the SS in accordance with CERCLA/SARA. As part of the remedial investigation, baseline human health and ecological risk assessments will be conducted. These baseline risk assessments will evaluate the potential impact on human health and the environment if remedial actions are not conducted, identify locations where additional information needs to be collected, help determine whether remedial actions are necessary, and provide justification for performing remedial actions. This report describes the sampling activities conducted between February and April 1993 to aid in evaluating the possible environmental impacts at the SS tailored to the specific circumstances and conditions found there. The initial investigations included identification of the flora and fauna in and around the SS, with particular emphasis on identifying sensitive environments, endangered species and their habitats, and those species consumed by humans or found in human food chains.

Not Available

1994-04-01

334

Preliminary investigation on the use of a light-trap for sampling malaria vectors in the Gambia  

PubMed Central

Light-traps have been used successfully as mechanical sampling tools for insects of agricultural importance but medical entomologists have had only limited success because of the assumption that light-traps would attract vectors, even when sited in open fields well away from hosts. The investigations reported in this paper suggest that vectors are attracted primarily by their hosts and that only when light-traps are placed in the immediate vicinity of hosts, or in the narrow flight paths followed by host-seeking females, are appreciable numbers caught. When the CDC miniature light-trap was placed at various distances from hosts, the number of anopheline and culicine species captured decreased as the distance from the host increased. There were statistically significant differences between the means of catches in light-traps suspended on or in human dwellings, placed inside village compounds, and placed near the breeding site about 1.6 km from the nearest house. The maximum catch of Anopheles gambiae s.l. and culicines exceeded 3000 and 7000 per trap per night, respectively, and the average was in excess of 1200 A. gambiae s.l. The investigations showed that 6 anopheline species could be caught in appreciable numbers in human dwellings and thus demonstrated that light-traps could be used for sampling both endophilic and exophilic anophelines. It also appears that the effective range of the CDC miniature light-trap is about 5 m.

Odetoyinbo, J. A.

1969-01-01

335

New observations of infiltration through fractured alluvium in Yucca Flat, Nevada Test Site: A preliminary field investigation  

SciTech Connect

Regional tectonics coupled with the subsurface detonation of nuclear explosives has caused widespread fracturing of the alluvium of Yucca Flat. Fractures deeper than 30 meters have been observed in boreholes. Some of these fractures are large enough to capture significant amounts of runoff during storm events. Evidence of stream capture by fractures and observations of runoff flowing into open fractures give qualitative evidence of infiltration to depths greater than several meters and possibly to the saturated zone. Our field observations contradict the assumption that little infiltration occurs on Yucca Flat. The larger, hydrologically important fractures are associated with geologic faults or the regional stress field. Additional field studies are needed to investigate the impact of fractures on the transport of contaminants.

Kao, C.S. [California Univ., Berkeley, CA (United States). Dept. of Civil Engineering; Smith, D.K. [Lawrence Livermore National Lab., CA (United States); McKinnis, W.B. [Lawrence Livermore National Lab., Mercury, NV (United States)

1994-02-01

336

A multistage approach to improve performance of computer-aided detection of pulmonary embolisms depicted on CT images: preliminary investigation.  

PubMed

This study developed a computer-aided detection (CAD) scheme for pulmonary embolism (PE) detection and investigated several approaches to improve CAD performance. In the study, 20 computed tomography examinations with various lung diseases were selected, which include 44 verified PE lesions. The proposed CAD scheme consists of five basic steps: 1) lung segmentation; 2) PE candidate extraction using an intensity mask and tobogganing region growing; 3) PE candidate feature extraction; 4) false-positive (FP) reduction using an artificial neural network (ANN); and 5) a multifeature-based k-nearest neighbor for positive/negative classification. In this study, we also investigated the following additional methods to improve CAD performance: 1) grouping 2-D detected features into a single 3-D object; 2) selecting features with a genetic algorithm (GA); and 3) limiting the number of allowed suspicious lesions to be cued in one examination. The results showed that 1) CAD scheme using tobogganing, an ANN, and grouping method achieved the maximum detection sensitivity of 79.2%; 2) the maximum scoring method achieved the superior performance over other scoring fusion methods; 3) GA was able to delete "redundant" features and further improve CAD performance; and 4) limiting the maximum number of cued lesions in an examination reduced FP rate by 5.3 times. Combining these approaches, CAD scheme achieved 63.2% detection sensitivity with 18.4 FP lesions per examination. The study suggested that performance of CAD schemes for PE detection depends on many factors that include 1) optimizing the 2-D region grouping and scoring methods; 2) selecting the optimal feature set; and 3) limiting the number of allowed cueing lesions per examination. PMID:20693106

Park, Sang Cheol; Chapman, Brian E; Zheng, Bin

2010-08-05

337

Detection of silver protein complex injections in the bovine udder using x-ray fluorescence: A preliminary investigation  

PubMed Central

Abstract To determine the feasibility of using x-ray fluorescence (XRF) to detect the presence of silver in the mammary gland of dairy cows injected with mild silver protein suspension. The XRF spectroscopy was conducted on cadaver udders with and without mild silver protein injected. Spectral analysis was performed in order to determine the amplitude of the silver K-alpha peak that was detected. By comparing the amplitude of the K-alpha peak to the background, a minimum time of collection was determined, as a measure of the time required to observe a silver signal that is significantly non-zero. The minimum detection time required for evidence of injected silver suspension was calculated to be 2.8 0.2 s. Even with an additional requirement that the net signal exceed 50 counts, the clear indication of the presence of silver will be observed within 4 min of interrogation. X-ray fluorescence spectroscopy was shown to be a viable method for the detection of injected silver protein in cadaver mammary glands of dairy cows. While these findings are promising, further studies must be conducted to investigate the time dependence of the silver signal when diffusion, absorption, and redistribution are involved, under conditions that better mimic those encountered at an exhibition. This technique, used in conjunction with screening ultrasound examinations, has the potential to confirm sites of injection of silver compounds.

2005-01-01

338

Front-face fluorescence spectroscopy as a rapid and nondestructive tool for differentiating various cereal products: a preliminary investigation.  

PubMed

The potential of intrinsic fluorescence spectroscopy was investigated for differentiating between processed grains (flours, pasta, and semolinas) of different wheat cereal products. A total of 59 samples (e.g., 20 complete Kamut, semicomplete Kamut, and soft wheat flours, 28 pasta, and 11 semolinas manufactured from complete Kamut, semicomplete Kamut, and hard wheat flours) were analyzed by front-face fluorescence spectroscopy. Tryptophan fluorescence spectra were scanned between 305 and 400 nm on samples following excitation at 290 nm. The principal component analysis (PCA) performed on flour spectra clearly differentiated complete Kamut and semicomplete Kamut samples from those produced from complete and semicomplete soft wheat flours. The PCA performed on pasta spectra discriminated samples manufactured from complete Kamut and complete hard wheat flours from those made with semicomplete Kamut and semicomplete hard wheat flours. The best discrimination was obtained from tryptophan spectra recorded on semolinas since the four groups were well discriminated. Correct classification amounting to 61.9% was obtained for pasta spectra. A better classification was obtained for flour and semolina spectra since correct classification amounted to 86.7% and 87.9%, respectively. Front-face fluorescence spectroscopy has the potential to be a rapid, low-cost, and efficient method for the authentication of cereal products. PMID:16536571

Karoui, Romdhane; Cartaud, Gerald; Dufour, Eric

2006-03-22

339

Preliminary investigation of the supply of chemical species to an aqueous solution using a hydrogen-oxygen flame.  

PubMed

A new method of supplying radical species to aqueous solutions using a hydrogen-oxygen flame is investigated. When a hydrogen-oxygen flame is directed on the surface of an aqueous solution, hydroxyl radicals (*OH) produced in the flame are extracted into the aqueous phase. The presence of *OH in the aqueous solution was confirmed by electron paramagnetic resonance with spin trapping using 5,5-dimethyl-1-pyrroline-N-oxide. The extraction of *OH into the aqueous solution was monitored using a quantitative analysis of hydrogen peroxide (H2O2). The effects of the hydrogen and oxygen gas flow rates, hydrogen/oxygen ratio, and atmosphere on H2O2 formation were studied. When the hydrogen-oxygen flame blew on a phosphate buffer solution (pH 6.7) under an Ar atmosphere, the concentration of H2O2 increased with the blowing time of the flame and the flow rate of hydrogen gas. Under air, nitrate and nitrite ions were formed in the aqueous phase in addition to H2O2, and the H2O2 concentration was lower than that under argon. The application of this new method to an aqueous solution of Cu(II)-ethylenediaminetetraacetic acid (EDTA) caused a remarkable decrease in the concentration of Cu(II)-EDTA and total organic carbon. PMID:16124325

Uchida, Miho; Sogabe, Takahiro; Ikoma, Tadaaki; Okuwakit, Akitsugu

2005-08-01

340

Preliminary technique assessment for nondestructive evaluation certification of the NNWSI [Nevada Nuclear Waste Storage Investigations] disposal container closure  

SciTech Connect

Under the direction of the Department of Energy`s (DOE) Office of Civilian Radioactive Waste Management (OCRWM) program, the Nevada Nuclear Waste Storage Investigations (NNWSI) project is evaluating a candidate repository site at Yucca Mountain, Nevada, for permanent disposal of high-level nuclear waste. The Lawrence Livermore National Laboratory (LLNL), a participant in the NNWSI project, is developing waste package designs to meet the NRC requirements. One aspect of this waste package is the nondestructive testing of the final closure of the waste container. The container closure weld can best be nondestructively examined (NDE) by a combination of ultrasonics and liquid penetrants. This combination can be applied remotely and can meet stringent quality control requirements common to nuclear applications. Further development in remote systems and inspection will be required to meet anticipated requirements for flaw detection reliability and sensitivity. New research is not required but might reduce cost or inspection time. Ultrasonic and liquid penetrant methods can examine all closure methods currently being considered, which include fusion welding and inertial welding, among others. These NDE methods also have a history of application in high radiation environments and a well developed technology base for remote operation that can be used to reduce development and design costs. 43 refs., 23 figs., 3 tabs.

Day, R.A.

1988-12-31

341

The Role of Social Support in Exposure Therapy for Operation Iraqi Freedom/Operation Enduring Freedom Veterans: A Preliminary Investigation  

PubMed Central

The lack of social support has consistently been identified as a relevant factor in the development, maintenance, and treatment of posttraumatic stress disorder (PTSD). Prospective studies with combat veterans have supported the erosion model of social support in the development of PTSD. This model posits that increased PTSD symptoms lead to diminished social support over time. Additional epidemiological work that has investigated mental health and functional impairment in recently returning Operation Iraqi Freedom and Operation Enduring Freedom (OIF/OEF) veterans has suggested that interpersonal problems coincide with the onset of PTSD. Despite research that suggests OIF/OEF veterans experience high rates of PTSD and associated interpersonal problems, no studies have examined social support in relation to treatment response in this group. The current study examined the role of four theorized functional aspects of social support emotional/informational support, positive social interactions, affectionate support, and tangible support on pretreatment PTSD symptom severity and treatment response in a sample of OIF/OEF veterans receiving exposure-based psychotherapy. Findings showed that positive social interactions were negatively correlated with pretreatment symptom severity, and emotional/informational support was positively related to increased treatment response. Together, these findings suggest that specific types of social support may have an important influence on the course of exposure treatment.

Price, Matthew; Gros, Daniel F.; Strachan, Martha; Ruggiero, Kenneth J.; Acierno, Ron

2012-01-01

342

Preliminary investigation fo the non-linear response of image intensifiers used for gamma-ray imaging  

NASA Astrophysics Data System (ADS)

Image intensifiers combined with columnar scintillators have found application in x-ray and gamma-ray, biomedical imaging and other fields. In scintillator imaging, hundreds or thousands of optical photons can illuminate the faceplate of the image intensifier in a small area, essentially simultaneously. This is a situation not found in the typical design application for an image intensifier, night vision or low-light-level imaging. Microchannel plates (MCPs) are known to exhibit gain saturation that could result in non-linear signal response in scintillator imaging, limiting quantitative measurement capabilities. A calibrated LED photon source was developed that can provide a known average number of photons per unit area in a small spot size, similar to that seen due to a gamma-ray interaction in a BazookaSPECT imager. A BazookaSPECT imager is composed of a columnar scintillator and an image intensifier, with output light optically imaged onto a CCD camera. The calibrated source was used to investigate gain-saturation effects for two Proxivision, GmbH image intensifiers, a single-stage BV 2583 EZ and a two stage BV 2583 QZ-V 100N in a BazookaSPECT imaging configuration. No gain saturation was found for the single-stage image intensifier up to more than 100 optical photons per microchannel, but significant gain-saturation non-linearities were measured in the two-stage image intensifier at high gains for >12 optical photons per microchannel. Implications for scintillator imaging using such systems are discussed.

Fastje, David; Barber, H. Bradford; Bora, Vaibhav; Lemieux, Daniel; Miller, Brian; Grim, Gary P.

2013-09-01

343

Preliminary investigation of bovine tuberculosis in suspected beef from a metropolitan abattoir in Ghana with Ziehl-Neelsen microscopy.  

PubMed

Bovine tuberculosis is an important zoonotic disease transmissible through aerosols inhalation and the ingestion of contaminated milk and meat from cattle. Abattoirs in Ghana mainly depend on post-mortem examinations as means of diagnosing the presence of mycobacterium in meat (beef). A Ziehl-Neelsen microscopy was used to investigate the presence of Mycobacterium bovis as Acid-Fast Bacilli (AFBs) in beef samples from the Kumasi Metropolitan abattoir; thereby vetting post-mortem examinations at the abattoir. Lesioned lung tissues and calcified or puss-filled thoracic lymph nodes were collected at post-mortem as directed by an expert veterinarian. A total of 159 samples from 130 cattle (bulls and cows) were used in this study from April to July 2006. Ninety-five (i.e., 73.1%) of the 130 cattle sampled were positive for AFBs, whilst the remaining thirty-five (26.9%) were negative. Out of the total 159 individual samples specimen collected, 114 (71.7%) were found with AFBs. A total of 64 lung tissues and 95 lymph nodes were collected, respectively. Interestingly, 70.3% of the lung tissues were AFB-positive with 69 (72.6%) out of the 95 lymph nodes, also being positive. The ZN microscopy was effective in detecting the presence of mycobacteria, as 73.1% of the suspected samples were AFB-positive. It presupposes that, abattoir post-mortem examinations were also efficient however; the lapses of non-detection of asymptomatic carcasses could also pose a serious health risk to consumers. Also, lack of a functional on-site laboratory and a practical monitoring system was found to be unfavourable to the maintenance of meat quality. Detailed laboratory examinations (such as culture, PCR and other biochemical tests) to augment ZN microscopy is recommended for thorough detection of bovine tuberculosis. PMID:19943459

Adu-Bobi, N A K; Mak-Mensah, E E; Achel, D G; Gyamfi, O K; Bedzra, K D

2009-09-01

344

Hemocyte responses of Dreissena polymorpha following a short-term in vivo exposure to titanium dioxide nanoparticles: preliminary investigations.  

PubMed

The widespread use of titanium-based nanoparticles and their environmental release may pose a significant risk to aquatic organisms within freshwater ecosystems. Suspension-feeder invertebrates like bivalve molluscs represent a unique target group for nanoparticle toxicology. The aim of this work was to investigate the short-term responses of Dreissena polymorpha hemocytes after in vivo exposure to titanium dioxide nanoparticles (TiO(2) NP). For this purpose, freshwater mussels were exposed to P25 TiO(2) NP at the concentrations of 0.1, 1, 5 and 25mg/L during 24h. Viability, phagocytosis activity and mitogen activated protein kinase (MAPK) phosphorylation level of ERK 1/2 and p38 in hemocytes extracted from exposed mussels were compared to those from control specimens. Results demonstrated an inhibition of the phagocytosis activity after exposure to TiO(2) NP at 0.1 and 1mg/L. Similar trends, albeit less pronounced, were reported for higher concentrations of NP. Transmission electron microscopy showed for the first time the internalization of TiO(2) NP into Dreissena polymorpha hemocytes. Besides, exposure to NP increased the ERK 1/2 phosphorylation levels in all treatments. Concerning the phosphorylation level of p38, only exposures to 5 and 25mg/L of NP induced significant p38 activation in comparison to that of the control. Finally, these short-term effects observed at environmentally relevant concentrations highlighted the need for further studies concerning ecotoxicological evaluation of nanoparticle release into an aquatic environment. PMID:23032565

Couleau, Nicolas; Techer, Didier; Pagnout, Christophe; Jomini, Stphane; Foucaud, Laurent; Laval-Gilly, Philippe; Falla, Jairo; Bennasroune, Amar

2012-09-30

345

Investigating the effects of microbial communities on electrical properties of soils: preliminary results from a pilot scale column experiment  

NASA Astrophysics Data System (ADS)

In this study, we describe the results of a mesoscale pilot experiment designed to investigate the influence of biogeochemical processes on electrical conductivity of soils impacted by hydrocarbons. This is an interdisciplinary study integrating geophysics, geochemistry, and microbiology which was undertaken to: 1) verify microbial hydrocarbon degradation by monitoring changes in microbial types, population, and community structure, 2) document temporal changes in the electrical conductivity of soils, and 3) document changes in pore fluid geochemistry using major ions and stable carbon isotopes. We constructed duplicate soil columns as follows: Columns 1 and 2 had no bacteria, no diesel; columns 3 and 4 had diesel and no bacteria; columns 5 and 6 had bacteria and no diesel; and columns 7 and 8 had bacteria and diesel. Soil cores were sampled at 5 cm intervals and analyzed for bacteria using the most probable number (MPN) and the rDNA intergenic spacer region analyses (RISA) techniques. The MPN method showed an increase in the percentage of alkane degraders with time, and accounted for 1.2x (120%) the number of heterotrophic bacteria in colums 7 and 8 compared to less than 15% for the other columns. The RISA analysis of the communities in columns 7 and 8 showed a shift towards less diversity over time in response to the contaminant stress to a composition that is more capable of the utilization of an alkane as a carbon source. These results confirm microbial mineralization of diesel within contaminated columns. Electrical conductivity measurements were made using a Wenner array at 2 cm spacing. The electrical measurements show an initial decrease in conductivity. This is consistent with the diesel replacing the more conductive pore waters and changes in water saturation, especially within the unsaturated zone. However, a slow increase in conductivity was observed in column 7 overtime compared to the other columns. The slight increase in electrical conductivity for the contaminated column may be attributed to microbial degradation of hydrocarbon and secondary weathering of the soil minerals. However, the magnitude in the shift of the pore fluid chemistry does not appear to directly translate to changes in soil electrical conductivity. At present, since the experiment is still ongoing, we expect that as more degradation and mineral weathering occur in the soils columns, we should be able to model the magnitude of the pore fluid chemical change on the soil conductivity.

Atekwana, E.; Atekwana, E.; Werkema, D.; Duris, J.; Rossbach, S.; Sauck, W.; Koretsky, C.; Cassidy, D.; Means, J.; Sherrod, L.

2003-04-01

346

The MTOR LM-MHD Flow Facility, and Preliminary Experimental Investigation of Thin Layer, Liquid Metal Flow in a 1/R Toroidal Magnetic Field  

SciTech Connect

Fairly recently, a new experimental free surface liquid metal MHD facility, the so-called MTOR facility, has come on-line, and new data has been taken concerning flows of gallium alloy across a moderately strong toroidal field with characteristic 1/R field gradient. The purpose of these experiments has been two-fold: to gather data for benchmarking currently existing one and two dimensional free surface computational flow models (as well as 3D models currently under development), and to investigate phenomena not predicted by models, especially effects of nozzles, drains, waves and turbulence. Data is presented concerning MHD effects on the mean flow height and wave structure, both with and without the so-called Zakharov magnetic propulsion current added to help control and stabilize the flow. The test section is wide enough so that the characteristic factor (Hartmann Number * Aspect Ratio) is less than unity. In this case the Hartmann layer drag effects are small, allowing comparison of experimental data to two-dimensional axisymmetric models. Preliminary conclusions suggest that the field gradient in these experiments does not adversely affect the stability of the surface, and that magnetic propulsion current is effective in flattening and accelerating the liquid metal flow.

Morley, Neil B.; Burris, Jonathan [University of California at Los Angeles (United States)

2003-07-15

347

Spiritual Bypass: A Preliminary Investigation  

ERIC Educational Resources Information Center

|The phenomenon of spiritual bypass has received limited attention in the transpersonal psychology and counseling literature and has not been subjected to empirical inquiry. This study examines the phenomenon of spiritual bypass by considering how spirituality, mindfulness, alexithymia (emotional restrictiveness), and narcissism work together to

Cashwell, Craig S.; Glosoff, Harriet L.; Hammond, Cheree

2010-01-01

348

Spiritual Bypass: A Preliminary Investigation  

ERIC Educational Resources Information Center

The phenomenon of spiritual bypass has received limited attention in the transpersonal psychology and counseling literature and has not been subjected to empirical inquiry. This study examines the phenomenon of spiritual bypass by considering how spirituality, mindfulness, alexithymia (emotional restrictiveness), and narcissism work together to

Cashwell, Craig S.; Glosoff, Harriet L.; Hammond, Cheree

2010-01-01

349

A possible link between Balkan endemic nephropathy and the leaching of toxic organic compounds from Pliocene lignite by groundwater: Preliminary investigation  

USGS Publications Warehouse

Balkan endemic nephropathy (BEN) is a fatal kidney disease that is known to occur only in clusters of villages in alluvial valleys of tributaries of the Danube River in Bulgaria, Romania, Yugoslavia, Bosnia, and Croatia. The confinement of this disease to a specific geographic area has led to speculation that an environmental factor may be involved in the etiology of BEN. Numerous environmental factors have been suggested as causative agents for producing BEN, including toxic metals in drinking water, metal deficiency in soils of BEN areas, and environmental mycotoxins to name a few. These hypotheses have either been disproved or have failed to conclusively demonstrate a connection to the etiology of BEN, or the clustering of BEN villages. In previous work, we observed a distinct geographic relationship between the distribution of Pliocene lignites in the Balkans and BEN villages. We hypothesized that the long-term consumption of well water containing toxic organic compounds derived from the leaching of nearby Pliocene lignites by groundwater was a primary factor in the etiology of BEN. In our current work, chemical analysis using 13C nuclear magnetic resonance (13CNMR) spectroscopy indicated a high degree of organic functionality in Pliocene lignite from the Balkans, and suggested that groundwater can readily leach organic matter from these coal beds. Semi-quantitative gas chromatography/mass spectroscopy analysis of solvent extracts of groundwater from shallow wells in BEN villages indicated the presence of potentially toxic aromatic compounds, such as napthalene, fluorene, phenanthrene, and pyrene at concentrations in the ppb range. Laboratory leaching of Balkan Pliocene lignites with distilled water yielded soluble organic matter (> 500 MW) containing large amounts of aromatic structures similar to the simple/discrete aromatic compounds detected in well water from BEN villages. These preliminary results are permissive of our hypothesis and suggest that further work on the possible relationship between the etiology of BEN and toxic aromatic substances leached from Pliocene lignites in well water is warranted.A distinct geographic relationship between the distribution of Pliocene lignites in the Balkans and villages where Balkan endemic nephropathy (BEN) occurs has been observed, indicating a possible link between BEN and the long-term consumption of well water containing toxic organic compounds derived from the leaching of nearby Pliocene lignites. Preliminary investigations by NMR spectroscopy, gas chromatography/mass spectroscopy and leaching experiments show a high degree of organic functionality in the Pliocene lignites, high-leachability by groundwater of organic matter from these beds, and the presence of toxic aromatic compounds.

Orem, W. H.; Feder, G. L.; Finkelman, R. B.

1999-01-01

350

Pesticide/herbicide pollutants in the Kafue River and a preliminary investigation into their biological effect through catalase levels in fish.  

PubMed

The study determined the types of pesticide/herbicide pollutants in water, sediment and fish from the Kafue River. A preliminary investigation of the oxidative stress from these pesticides/herbicides was also assessed by measurement of catalase activity. Water, sediment and fish samples were collected upstream, midstream and downstream the Kafue river in Chingola, Kitwe, Kafue National Park and Kafue Town. Water, sediment and fish muscle were sampled and analysed for pesticides using Gas chromatography. For catalase activity fish liver samples only were examined. The pesticides/herbicides detected in all samples collectively included: Heptachlor, pp'-DDE, Cypermethrin, Chlordane, Toxaphene, Terbufos, Kelthane, Endosulfan, Dieldrin, pp'-DDD, pp'-DDT, Atrazine, Disulfoton, d-trans-Allethrin and Endrin. On the other hand, catalase activity was detected in all fish liver samples from all sites. Its levels increased significantly from Chingola upstream to sites downstream with highest being in Kafue town. This study therefore, demonstrates that there is widespread contamination of the Kafue River with pesticides/ herbicides. It also demonstrates that organochlorides are found throughout the river especially in fish samples. The spectrum of pesticides/herbicides was much wider in fish probably due to bioaccumulation. It was also observed that fish are subjected to oxidative stress as determined by catalase levels. The stress is more pronounced downstream where the catalase levels were significantly higher than Chingola. The observation that more pesticide varieties are also found downstream may suggest a likely causative effect of the pesticides on oxidative stress although this needs further investigation. This study further tentatively highlights the potential dangers of these agro-related substances to dependants of the Kafue River water body and the need to carry out risk assessments and thereafter institute corrective measures to help reduce contamination and adverse effects. PMID:17201197

Syakalima, Michelo; Choongo, Kennedy; Mwenechanya, Roy; Wepener, Victor; Yamasaki, Masahiro; Maede, Yoshimitsu

2006-11-01

351

Carbon and Certain Alloy Steel Wire Rod from Egypt, South Africa, and Venezuela. Investigation Nos. 731-TA-955, 960 and 963 (Preliminary) (Second Remand).  

National Technical Information Service (NTIS)

By decision dated June 7, 2005, the Court of International Trade (the 'Court') remanded the Commission's preliminary determinations that subject imports of carbon and certain alloy steel wire rod ('wire rod') from South Africa individually, and Egypt, Sou...

2005-01-01

352

Radiative Capacity of Pyrographite.  

National Technical Information Service (NTIS)

Pyrographite possesses a highly-oriented structure which conditions the anisotropy of its properties. An investigation was made of the radiative capacity of pyrographite at a wavelength of 0.55 microns which was obtained by the vacuum method at various de...

A. N. Romanov B. M. Barykin E. G. Spiridonov

1972-01-01

353

Sandia Solar Dryer: Preliminary Performance Evaluation.  

National Technical Information Service (NTIS)

Preliminary performance evaluations were conducted with the prototype modular solar dryer for wastewater sludge at Sandia National Laboratories. Operational parameters which appeared to influence sludge drying efficiency included condensation system capac...

J. S. Glass T. Holm-Hansen J. Tills J. D. Pierce

1986-01-01

354

Beyond Capacity  

ERIC Educational Resources Information Center

|Over the past few years, 300,000 students have been turned away from California community colleges. Those that remain jockey for classes with ever-narrower registration deadlines. City College of San Francisco may be forced to close its doors to its 90,000 students after a state investigation found that the administration hadn't managed budget

Boerner, Heather

2012-01-01

355

Preliminary phytochemical and antimicrobial investigations on Melia Dubia Bark: Department of Pharmaceutical Chemistry, J.S.S. College of Pharmacy, Rocklands, P.B. No.20, Ootacamund - 643 001, Tamilnadu, India.  

PubMed

The various parts of Melia dubia (Meliaceae) plant was observed to be used by the local tribes of Nilgiris for various infections. There was no report on antimicrobial activity of Melia dubia. Therefore, a preliminary phytochemical analysis and antimicrobial investigations were carried out on different extracts of Melia dubia bark. Ethanolic and aqueous extracts of the bark were found to posses significant antibacterial activity against Staphylococcus aureus. PMID:22556908

1999-07-01

356

Preliminary phytochemical and antimicrobial investigations on Melia Dubia Bark: Department of Pharmaceutical Chemistry, J.S.S. College of Pharmacy, Rocklands, P.B. No.20, Ootacamund - 643 001, Tamilnadu, India.  

PubMed Central

The various parts of Melia dubia (Meliaceae) plant was observed to be used by the local tribes of Nilgiris for various infections. There was no report on antimicrobial activity of Melia dubia. Therefore, a preliminary phytochemical analysis and antimicrobial investigations were carried out on different extracts of Melia dubia bark. Ethanolic and aqueous extracts of the bark were found to posses significant antibacterial activity against Staphylococcus aureus.

1999-01-01

357

A preliminary investigation of insect colonization and succession on remains of rabbits treated with an organophosphate insecticide in El-Qalyubiya Governorate of Egypt  

Microsoft Academic Search

A preliminary field study in the summer in a rural village in El-Qalyubiya Governorate (Egypt) compared the necrophagous insects colonizing the cadavers of two male rabbits (Oryctolagus cunicullus domesticus L.) killed by asphyxia (control), with two poisoned by the organophosphate (OP) pesticide pirimiphos-methyl (test). Decay of control carcasses was rapid since they reached the skeletal stage in only 19 days.

M. M. Abd El-bar; R. F. Sawaby

2011-01-01

358

Preliminary investigation of catchment hydrology in response to agricultural water use innovations: A case study of the Potshini catchment South Africa  

NASA Astrophysics Data System (ADS)

Water use system innovations encompass various techniques for storing and conserving water resources in different mediums for domestic and livestock use including agricultural production. Although, several authors have indicated that rainwater harvesting techniques, especially for upgrading smallholder farming systems, are not new but have been practiced since ancient civilizations, the impacts of such water use innovations on eco-hydrological systems are rarely assessed, especially from a cascading spatial and temporal perspective. The need to quantify the supposedly potential and related hydrological impacts of water use innovations on a catchment and river basin at large, led to the on-going research study aimed at investigating the biophysical consequences at different spatial and temporal scales in the Thukela river basin, of increased productivity in smallholder rainfed agriculture enabled through adoption at larger spatial scale of integrated land use management and water use system innovations. In this paper we discuss and outline the approach used in setting up the research study in one of the catchments in the Thukela river basin, the Potshini catchment, in the KwaZulu-Natal Province of South Africa in an effort to seek answers to the question: What is the impact of adapting water use innovations in a predominantly agricultural area on catchment ecology and hydrology? The approach incorporates a catchment monitoring network, hydrological modelling and application of a remote sensing technique, the Surface Energy Balance Algorithm for Land (SEBAL), for spatially estimating the total evaporation in the region covering the Potshini catchment and beyond. Preliminary results indicate that water use innovations in the Potshini catchment have influenced the partitioning of rainfall, by significantly reducing surface runoff over agricultural lands under conservation tillage practices, with a reduction of above 100%, while encouraging infiltration and deeper percolation into the soil. It is envisaged that, on accomplishment, the study will contribute to formulation of sustainable adaptation of water use innovations and up-scaling strategies to enhance food production and hydro-ecological balance in semi-arid savannahs of Africa, at which stage hydrological modelling will form an important part of the study.

Kongo, V. M.; Jewitt, G. P. W.

359

An investigation into the compatibility of some irreversible hydrocolloid impression materials and dental gypsum products. Part I. Capacity to record grooves on the international standard die.  

PubMed

Some alginate impression materials produce rough, chalky, soft surfaces on gypsum casts. This is recognized by various standards, which include tests for an alginate's compatibility with gypsum, and its capacity to record details and impart these to a gypsum cast. These qualities were looked at in this study. The method used closely followed that laid down by International Standard ISO 1563-1978(E) for alginate impression materials. Ten alginates and seven gypsum products were tested. Using the criteria specified by this Standard, it was found that none of the materials tested was able to record the finest (0.020 mm) line on the test block. However, two elastomeric impression materials tested in the same manner also failed to reproduce this line, as did all the gypsum products when tested directly against the block. These findings cast some doubt on the efficacy of utilising such a fine line in the classification of these materials. Only thirty-four of the seventy possible combinations were able to reproduce the 0.050 mm line. Eight combinations reproduced the 0.075 mm line as the finest line, and the remainder (thirty-eight) failed to record any of the lines. Some of the alginate materials were treated with fixing solutions of varying concentrations of potassium sulphate and alum. The results obtained varied, sometimes producing marked improvement, sometimes deterioration in the surface quality of the subsequent gypsum casts, despite the fact that none of the manufacturers of the alginates recommended the use of fixing solutions. PMID:3511200

Owen, C P

1986-01-01

360

Preliminary investigations for technology assessment of /sup 99/Mo production from LEU (low enriched uranium) targets. [For production of /sup 99m/Tc; by different methods  

SciTech Connect

This paper presents the results of preliminary studies on the effects of substituting low enriched uranium (LEU) for highly enriched uranium (HEU) in targets for the production of fission product /sup 99/Mo. Issues that were addressed are: (1) purity and yield of the /sup 99/Mo//sup 99m/Tc product, (2) fabrication of LEU targets and related concerns, and (3) radioactive waste. Laboratory experimentation was part of the efforts for issues (1) and (2); thus far, radioactive waste disposal has only been addressed in a paper study. Although the reported results are still preliminary, there is reason to be optimistic about the feasibility of utilizing LEU targets for /sup 99/Mo production. 37 refs., 1 fig., 5 tabs.

Vandegrift, G.F.; Chaiko, D.J.; Heinrich, R.R.; Kucera, E.T.; Jensen, K.J.; Poa, D.S.; Varma, R.; Vissers, D.R.

1986-11-01

361

Using Pilot-Scale Investigations to Estimate the Remaining Geosmin and MIB Removal Capacity of Full-Scale GAC-Capped Drinking Water Filters  

Microsoft Academic Search

Pilot tests were conducted to investigate the removal of geosmin and 2-methylisoborneol (MIB) by new and semi-exhausted granular activated carbon (GAC) extracted from full-scale filters located in the City of Toronto's drinking water treatment facilities. Four pilot filters containing core-sampled GAC and new sand were fed with settled water from a full-scale plant and operated under conditions similar to those

Souleymane Ndiongue; William B. Anderson; Abhay Tadwalkar; John Rudnickas; Margaret Lin; Peter M. Huck

2006-01-01

362

Preliminary in-situ major and trace element and isotopic investigation of carbonatites and associated alkaline silica-undersaturated rocks from the Oka complex, Qubec (Canada)  

NASA Astrophysics Data System (ADS)

The Oka carbonatite complex is one of the most westerly intrusions of the Monteregian Igneous Province (MIP), which is composed of plutons and dykes of alkaline compositions emplaced within southern Qubec. Oka is geologically significant because: i. it is one of the youngest carbonatites in North America (between 109 2 and 131 7 Ma), ii. contains both a variety of carbonatitic and silicate rocks (e.g. alnite, okaite), and iii. mined in the past for Nb (pyrochlore). The exact origin of the MIP alkaline intrusions still remains unknown and has been attributed to either melting of lithospheric mantle during the opening of the North Atlantic Ocean, a mantle plume origin, or linked to magmatism associated with the Vermont White Mountains and the New England seamounts. However, there remains much debate as to the exact origin of parental melts to carbonatites; i.e. models include derivation from lithosphere, a mixture between lithosphere and asthenosphere, or an asthenospheric (plume) origin. Whole rock Nd, Sr, and Pb isotope data from previous investigations of the Oka carbonatites indicate derivation from a time-integrated depleted mantle source. However, deciphering mantle sources and melt crystallization histories based on whole rock isotopic data is rendered difficult since previous studies of carbonatite-bearing, alkaline complexes indicate isotopic disequilibrium amongst co-existing minerals and/or with their corresponding host rock. Consequently, a multi-faceted study was initiated involving in-situ chemical (major and trace element) and isotopic (C, O, Sr, Nd, Pb, U-Pb) characterization of the dominant minerals at the micron scale in the carbonatites and associated alkaline Si-undersaturated rocks from Oka. Preliminary major and trace element analyses (electron microprobe analysis and laser ablation-ICP-MS) and in-situ Sr isotope analyses (laser ablation-MC-ICP-MS) of mainly carbonates were obtained for several carbonatites and a melilite-bearing okaite. Major element analyses reveal that carbonates are calcite and apatite is REE-enriched (>4 wt% total REEs). In-situ trace element analyses of calcite within 5 distinct areas of carbonatite sample Oka2.2 indicate similar REE abundances, and corresponding in-situ 87Sr/86Sr isotope values are extremely uniform (0.70322-0.70339; given associated uncertainties). In contrast, in-situ trace element analyses of calcite from okaite (Oka2.3) show variable REE abundances that correlate positively with their 87Sr/86Sr values (0.70270 - 0.70303). Apatite blades from sample Oka2.3 have higher 87Sr/86Sr ratios (0.70325 - 0.70345) that overlap those for calcite from sample Oka2.2. Thus, the chemical and Sr isotope data obtained for calcites from samples Oka2.2 and Oka2.3 cannot be explained by either simple closed system crystal fractionation, assimilation-fractional crystallization (AFC), derivation by liquid immiscibility, or partial melting from the same mantle source. These first results clearly demonstrate that a complex crystallization history must be invoked, perhaps mixing of melts derived from isotopically distinct mantle reservoirs.

Simonetti, A.; Chen, W.

2010-12-01

363

Investigation of the characteristics of the nickle oxide electrode under the conditions of operation of high-capacity storage batteries of the TNZhK type  

SciTech Connect

There have been virtually no investigations of the behavior of laminated NOE at elevated temperatures. It was therefore desirable to study the joint influence of electrolyte temperature and addition of cobalt on the behavior of NOE at high discharge rates and in the course of charging; this was the purpose of the present work. Laminated NOE 36 x 14 x 3.5 mm in size were taken for the investigation. The content of active material in each electrode was 3 g. Cobalt was introduced into the prepared material in the form of sulfate solution in the ratio of 3% Co/Ni. The tests were conducted in a gastight cell made of transparent plastic and connected to a buret for collecting the gas. The electrolyte consisted of NaOH solution (d = 1.20 g/cm/sup 3/) + 5 g/liter LiOH. The auxiliary electrodes were made of Ni foil. The anode and cathode currents were chosen in accordance with the conditions of operation of TNZhK batteries. The potentials were measured against a mercury oxide reference electrode in the same solution. Two series of experiments were carried out. In the first series the electrodes were charged in the temperature range 25 to 70/sup 0/, with simultaneous collection of gas. The discharge temperature was 25/sup 0/. In the second series the electrodes were charged at 25/sup 0/ and discharged at temperatures in the range 25 to 70/sup 0/.

Leshcheva, E.N.; Glazatova, T.N.; Aguf, I.A.

1982-07-01

364

Capacity Scaling of Ad Hoc Networks with Spatial Diversity  

Microsoft Academic Search

This paper derives the exact outage probability and transmission capacity of ad hoc wireless networks with nodes em- ploying multiple antenna diversity techniques. The analysis enables a direct comparison of the number of simultaneous transmissions achieving a certain data rate under different diversity techniques. Preliminary results derive the outage probability and transmission capacity for a general class of signal distributions

Andrew M. Hunter; Jeffrey G. Andrews; Steven P. Weber

2007-01-01

365

Photovoltaics effective capacity: Interim final report 2  

SciTech Connect

The authors provide solid evidence, based on more than 8 million data points, that regional photovoltaic (PV) effective capacity is largely unrelated to the region`s solar resource. They confirm, however, that effective capacity is strongly related to load-shape characteristics. The load-shape effective-capacity relationship appears to be valid for end-use loads as small as 100 kW, except possibly in the case of electrically heated buildings. This relationship was used as a tool to produce a US map of PV`s effective capacity. The regions of highest effective capacities include (1) the central US from the northern Great Plains to the metropolitan areas of Chicago and Detroit, down to the lower Mississippi Valley, (2) California and western Arizona, and (3) the northeast metropolitan corridor. The features of this map are considerably different from the traditional solar resource maps. They tend to reflect the socio-economic and climatic factors that indirectly drive PV`s effective capacity: e.g., commercial air-conditioning, little use of electric heat, and strong summer heat waves. The map provides a new and significant insight to a comprehensive valuation of the PV resource. The authors assembled preliminary evidence showing that end-use load type may be related to PV`s effective capacity. Highest effective capacities were found for (nonelectrically heated) office buildings, followed by hospitals. Lowest capacities were found for airports and residences. Many more data points are needed, however, to ascertain and characterize these preliminary findings.

Perez, R.; Seals, R. [State Univ. of New York, Albany, NY (United States). Atmospheric Sciences Research Center

1997-11-01

366

Preliminary X-ray investigations of several crystal forms of the ferripyoverdine FpvA outer membrane receptor from Pseudomonas aeruginosa bound to ferripyoverdine  

PubMed Central

Ferripyoverdine transport across the outer membrane of Pseudomonas aeruginosa by the pyoverdine receptor FpvA and the transcriptional regulation of FpvA involve interactions of the FpvA N-terminal TonB box and signalling domain with proteins from the inner membrane. Several crystallization conditions of FpvAPvd-Fe solubilized in C8E4 detergent were obtained and X-ray data were collected from three crystal forms. The resolution limits range from 3.15 to 2.7? depending on the crystal form. From preliminary analysis of the electron-density maps, the first full-length structure of an outer membrane receptor including a signalling domain should be determined.

Wirth, Christophe; Hoegy, Francoise; Pattus, Franc; Cobessi, David

2006-01-01

367

Marketing and production capacity strategy for non-differentiated products: Winning and losing at the capacity cycle game  

Microsoft Academic Search

Customer satisfaction and supplier loyalty in markets where products are mainly undifferentiated are heavily affected by assurance of supply. Marketers manage production capacity in such markets to assure supply, but the resulting capacity competition leads to cycles of over-capacity followed by capacity deletions, which lead to under-capacity. We investigate some of the possible causes of this form of industry behavior

James A. Dearden; Gary L. Lilien; Eunsang Yoon

1999-01-01

368

Bearing capacity of desiccated tailings  

SciTech Connect

The development of matric suctions in soils contributes to their shear strength, resulting in an enhanced factor of safety against bearing-capacity failure. In this paper, matric suction profiles of desiccated mine tailings are predicted from a steady-state solution for evaporative conditions, and from an isothermal mathematical model that simulates liquid and vapor water flow through soils. The shear-strength envelope with respect to matric suction is established by testing reconstituted tailings samples in a modified triaxial cell, in which matric suction can be controlled. The contribution of matric suction to the shear strength is interpreted as an additional apparent cohesion for use in bearing-capacity calculations. Because of the nonlinearity of the shear-strength profile, a numerical method of analysis is adopted to predict the ultimate bearing capacity of the desiccated tailings. A subsequent decrease in bearing capacity following 2D water infiltration into a partially capped tailings deposit and accompanying suction loss is investigated.

Rassam, D.W.; Williams, D.J. [Univ. of Queensland, Brisbane, Queensland (Australia). Dept. of Civil Engineering

1999-07-01

369

A preliminary investigation of Large Eddy Simulation (LES) of the flow around a cylinder at ReD = 3900 using a commercial CFD code  

SciTech Connect

Engineering fluid mechanics simulations at high Reynolds numbers have traditionally been performed using the Reynolds-Averaged Navier Stokes (RANS) equations and a turbulence model. The RANS methodology has well-documented shortcomings in the modeling of separated or bluff body wake flows that are characterized by unsteady vortex shedding. The resulting turbulence statistics are strongly influenced by the detailed structure and dynamics of the large eddies, which are poorly captured using RANS models (Rodi 1997; Krishnan et al. 2004). The Large Eddy Simulation (LES) methodology offers the potential to more accurately simulate these flows as it resolves the large-scale unsteady motions and entails modeling of only the smallest-scale turbulence structures. Commercial computational fluid dynamics products are beginning to offer LES capability, allowing practicing engineers an opportunity to apply this turbulence modeling technique to much wider array of problems than in dedicated research codes. Here, we present a preliminary evaluation of the LES capability in the commercial CFD solver StarCD by simulating the flow around a cylinder at a Reynolds number based on the cylinder diameter, D, of 3900 using the constant coefficient Smagorinsky LES model. The results are compared to both the experimental and computational results provided in Kravchenko & Moin (2000). We find that StarCD provides predictions of lift and drag coefficients that are within 15% of the experimental values. Reasonable agreement is obtained between the time-averaged velocity statistics and the published data. The differences in these metrics may be due to the use of a truncated domain in the spanwise direction and the short time-averaging period used for the statistics presented here. The instantaneous flow field visualizations show a coarser, larger-scale structure than the study of Kravchenko & Moin (2000), which may be a product of the LES implementation or of the domain and resolution used. Based on this preliminary study, we conclude that StarCD's LES implementation may useful for low Reynolds number LES computations if proper care is used in the problem and mesh definition.

Paschkewitz, J S

2006-02-14

370

Neural substrates of cognitive capacity limitations  

PubMed Central

Cognition has a severely limited capacity: Adult humans can retain only about four items in mind. This limitation is fundamental to human brain function: Individual capacity is highly correlated with intelligence measures and capacity is reduced in neuropsychiatric diseases. Although human capacity limitations are well studied, their mechanisms have not been investigated at the single-neuron level. Simultaneous recordings from monkey parietal and frontal cortex revealed that visual capacity limitations occurred immediately upon stimulus encoding and in a bottom-up manner. Capacity limitations were found to reflect a dual model of working memory. The left and right halves of visual space had independent capacities and thus are discrete resources. However, within each hemifield, neural information about successfully remembered objects was reduced by adding further objects, indicating that resources are shared. Together, these results suggest visual capacity limitation is due to discrete, slot-like, resources, each containing limited pools of neural information that can be divided among objects.

Buschman, Timothy J.; Siegel, Markus; Roy, Jefferson E.; Miller, Earl K.

2011-01-01

371

In vitro investigations of the potential health benefits of Australian-grown faba beans (Vicia faba L.): chemopreventative capacity and inhibitory effects on the angiotensin-converting enzyme, ?-glucosidase and lipase.  

PubMed

The functional properties, including antioxidant and chemopreventative capacities as well as the inhibitory effects on angiotensin-converting enzyme (ACE), ?-glucosidase and pancreatic lipase, of three Australian-grown faba bean genotypes (Nura, Rossa and TF(Ic*As)*483/13) were investigated using an array of in vitro assays. Chromatograms of on-line post column derivatisation assay coupled with HPLC revealed the existence of active phenolics (hump) in the coloured genotypes, which was lacking in the white-coloured breeding line, TF(Ic*As)*483/13. Roasting reduced the phenolic content, and diminished antioxidant activity by 10-40 % as measured by the reagent-based assays (diphenylpicrylhydrazyl, 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) and oxygen radical absorbance capacity) in all genotypes. Cell culture-based antioxidant activity assay (cellular antioxidant activity) showed an increase of activity in the coloured genotypes after roasting. Faba bean extracts demonstrated cellular protection ability against H?O?-induced DNA damage (assessed using RAW264.7 cells), and inhibited the proliferation of all human cancer cell lines (BL13, AGS, Hep G2 and HT-29) evaluated. However, the effect of faba bean extracts on the non-transformed human cells (CCD-18Co) was negligible. Flow cytometric analyses showed that faba bean extracts successfully induced apoptosis of HL-60 (acute promyelocytic leukaemia) cells. The faba bean extracts also exhibited ACE, ?-glucosidase and pancreatic lipase inhibitory activities. Overall, extracts from Nura (buff-coloured) and Rossa (red-coloured) were comparable, while TF(Ic*As)*483/13 (white-coloured) contained the lowest phenolic content and exhibited the least antioxidant and enzyme inhibition activities. These results are important to promote the utilisation of faba beans in human diets for various health benefits. PMID:22916808

Siah, Siem D; Konczak, Izabela; Agboola, Samson; Wood, Jennifer A; Blanchard, Christopher L

2012-08-01

372

Capacity and Currere  

Microsoft Academic Search

My first epigraph above speaks of an arena little talked about these days of terrorism, acrimony, and road rage. It speaks\\u000a of interiority, that which is within all things and so has capacity. The word capacity interests me. Capacity suggests\\u000a wideness, not narrowness; openness; space for possibilities not yet even imagined, or if imagined done so with a tremble.\\u000a Capacity

Mary Doll

373

MIMO environmental capacity sensitivity  

Microsoft Academic Search

Wireless communications using multiple input multiple output (MIMO) systems enable increased spectral efficiency for a given total transmit power. The increased capacity is achieved through the introduction of additional spatial channels (space-time coding). In this paper, MIMO capacity is calculated as a function of environmental factors, including channel complexity, external interference and channel estimation error. The capacity of MIMO systems,

Daniel W. Bliss; K. W. Forsythe; A. O. Hero; A. L. Swindlehurst

2000-01-01

374

The Relationship of Resting Cerebral Blood Flow and Brain Activation during a Social Cognition Task in Adolescents with Chronic Moderate to Severe Traumatic Brain Injury: A Preliminary Investigation  

PubMed Central

Alterations in cerebrovascular function are evident acutely in moderate to severe traumatic brain injury (TBI), although less is known about their chronic effects. Adolescent and adult patients with moderate to severe TBI have been reported to demonstrate diffuse activation throughout the brain during functional magnetic resonance imaging (fMRI). Because fMRI is a measure related to blood flow, it is possible that any deficits in blood flow may alter activation. An arterial spin labeling (ASL) perfusion sequence was performed on seven adolescents with chronic moderate to severe TBI and seven typically developing (TD) adolescents during the same session in which they had performed a social cognition task during fMRI. In the TD group, prefrontal CBF was positively related to prefrontal activation and negatively related to non-prefrontal, posterior, brain activation. This relationship was not seen in the TBI group, who demonstrated a greater relationship between prefrontal CBF and non-prefrontal activation than the TD group. An analysis of CBF data independent of fMRI showed reduced CBF in the right non-prefrontal region (p<.055) in the TBI group. To understand any role reduced CBF may play in diffuse, extra-activation, we then related the right non-prefrontal CBF to activation. CBF in the right non-prefrontal region in the TD group was positively associated with prefrontal activation, suggesting an interactive role of non-prefrontal and prefrontal blood flow throughout the right hemisphere in healthy brains. However, the TBI group demonstrated a positive association with activation constrained to the right non-prefrontal region. These data suggest a relationship between impaired non-prefrontal CBF and the presence of non-prefrontal extra-activation, where the region with more limited blood flow is associated with activation limited to that region. In a secondary analysis, pathology associated with hyperintensities on T2-weighted FLAIR imaging over the whole brain was related to whole brain activation, revealing a negative relationship between lesion volume and frontal activation, and a positive relationship between lesion volume and posterior activation. These preliminary data, albeit collected with small sample sizes, suggest that reduced non-prefrontal CBF, and possibly pathological tissue associated with T2-hyperintensities, may provide contributions to the diffuse, primarily posterior extra-activation observed in adolescents following moderate to severe TBI.

Newsome, Mary R.; Scheibel, Randall S.; Chu, Zili; Hunter, Jill V.; Li, Xiaoqi; Wilde, Elisabeth A.; Lu, Hanzhang; Wang, Zhiyue J.; Lin, Xiaodi; Steinberg, Joel L.; Vasquez, Ana C.; Cook, Lori; Levin, Harvey S.

2011-01-01

375

The worker role interview--preliminary data on the predictive validity of return to work of clients after an insurance medicine investigation.  

PubMed

The aim was to investigate the predictive validity of the Worker Role Interview (WRI) for return to work at a 2-year follow-up of clients who attended an insurance medicine investigation center. The WRI identifies psychosocial and environmental factors that influence a person's abilities to return to work. Forty-eight of 202 consecutively selected clients constituted the study group. The Mann-Whitney U test was used to test the statistically significant differences in WRI ratings between those who were working (n = 6) and those who were not (n = 42) 2 years after their investigations. Five of the 17 items in WRI had a tentative predictive validity of return to work. The content area "personal causation" in WRI, had the best predictive validity. The results emphasize the importance of considering the unique individual's beliefs and expectations of his/her effectiveness at work when assessing clients' work ability and planning for further rehabilitation. PMID:15074365

Ekbladh, Elin; Haglund, Lena; Thorell, Lars-Hkan

2004-06-01

376

Short communication: Preliminary investigation into the effect of freezing and a cryopreservant on the recovery of mastitis pathogens from ewe milk  

Microsoft Academic Search

The objective of this study was to investigate the recovery of bacteria from ewe milk after freezing for 4 or 8 wk with and without the addition of glycerol as a cryopreservant. A total of 50 udder-half milk samples with a known range of bacterial species were selected, stored, and analyzed in 5 treatment groups: time zero; frozen for 4

E. M. Smith; E. M. Monaghan; S. J. Huntley; L. E. Green

2011-01-01

377

Certain Frozen or Canned Warmwater Shrimp and Prawns from Brazil, China, Ecuador, India, Thailand, and Vietnam. Investigations Nos. 731-TA-1063-1068 (Preliminary).  

National Technical Information Service (NTIS)

On the basis of the record developed in the subject investigations, the United States International Trade Commission (Commission) determines, pursuant to sections 733(a) of the Tariff Act of 1930 (19 U.S.C. paragraph 1673b(a) (the Act)), that there is rea...

2004-01-01

378

REVIEW OF LITERATURE AND A PRELIMINARY EXPERIMENTAL INVESTIGATION ON START-UP INSTABILITIES IN AN R-11 THERMOSIPHON LOOP WITH APPLICATIONS IN MICROELECTRONIC CHIP COOLING  

Microsoft Academic Search

A literature review on the recent applications and developments of thermosiphon loop is conducted. In particular, systems suitable for cooling of microelectron ic chips are reviewed in greater detail. The advantages of using a thermosiphon loop in microelectronic applications are discussed. The instability and temperature overshoot at the start-up have been identified as major problems which require further investigation. An

Satish G. Kandlikar; Sandor Habsberg

379

Certain Color Television Receivers from China and Malaysia. Investigation No. 731-TA-1034 and 1035 (Preliminary). Determinations and Views of the Commission.  

National Technical Information Service (NTIS)

On the basis of the record developed in the subject investigations, the United States International Trade Commission (Commission) determines, pursuant to section 733(a) of the Tariff Act of 1930 (19 U.S.C. Section 1673b(a)) (the Act), that there is a reas...

2003-01-01

380

Chemical body composition of 20 Thoroughbred foals at 160 days of age, and preliminary investigation of techniques used to predict body fatness  

Microsoft Academic Search

AIMS: To determine the chemical body composition of Thoroughbred foals born in two consecutive years, and to investigate several techniques used to predict body composition in foals born in the second year, with particular reference to fat.METHODS: The chemical composition of 20 foals at around 160 days of age, born in two years, was determined. In vivo techniques to predict

EK Gee; PF Fennessy; PCH Morel; ND Grace; EC Firth; TD Mogg

2003-01-01

381

Certain Non-Frozen Concentrated Apple Juice from China. Investigation No. 731-TA-841 (Preliminary). Determination and Views of the Commission.  

National Technical Information Service (NTIS)

On the basis of the record developed in the subject investigation, the United States International Trade Commission determines, pursuant to section 733(a) of the Tariff Act of 1930, that there is a reasonable indication that an industry in the United Stat...

1999-01-01

382

Certain Expandable Polystyrene Resins from Indonesia and Korea. Investigations Nos. 731-TA-861 and 862 (Preliminary). Determinations and Views of the Commission.  

National Technical Information Service (NTIS)

On the basis of the record developed in the subject investigations, the United States International Trade Commission determines, pursuant to section 733(a) of the Tariff Act of 1930 (19 U.S.C. Section 1673b(a)) (the Act), that there is a reasonable indica...

2000-01-01

383

A Preliminary Investigation of the Yallalie Basin: A Buried 15 KM Diameter Structure of Possible Impact Origin in the Perth Basin, Western Australia  

NASA Astrophysics Data System (ADS)

In late 1990, Ampol Exploration drew the attention of the senior author to an enigmatic structure located in Mesozoic rocks in the Dandaragan Trough of the Perth Basin about 200 km north of Perth, Western Australia. The basin-like Yallalie structure, centred on coordinates ca. 30 degrees 28'S, 115 degrees 47'E, is subcircular in plan view and about 15 km in diameter. Recognizing structures beneath the basin likely to contain oil, Ampol carried out an intensive geophysical survey of the area, and subsequently drilled a well (Yallalie 1). The well proved to be dry and exploration ceased. Generously, Ampol and their partners have made available the results of their exploration for a research project into the nature of the structure. Geology and regional setting: The exposed geology of the Yallalie basin area comprises discontinuous sequences of sedimentary rocks (sandstones, siltstones and shales) of Middle Jurassic to Late Cretaceous age that are capped by laterite and locally covered by thin (<50 m) Cenozoic eolian, colluvial and alluvial deposits (Cockbain, 1990). Modern, high-resolution, seismic reflection profiles across the Yallalie structure show a basin-shaped area of chaotic reflections that extend down to a depth of approximately 2 km below the surface. The structure has sharp boundaries with surrounding faulted, but otherwise relatively undisturbed rocks. At the base of the structure there is a central uplifted area approximately 3-4 km across similar to those described from complex impact structures (Dence et al., 1977). A preliminary survey of the area has shown that exposed rocks of the Yarragadee Formation (Middle Jurassic to Lower Cretaceous) and the succeeding Warnbro (Lower Cretaceous) and Coolyena (Late Cretaceous) Groups dip gently and their deposition appears to have postdated the underlying structure of intensely disturbed rocks. Although the structure is "draped" by a thin (a few hundred metres) veneer of late Jurassic to Cretaceous rocks it has some surface expression. A broad depression approximately 120 m deep is centered on Yallalie Well and is bounded to the west and north by a marked "rim." The area is characterized by a radial pattern of drainage that flows into the depression and which is gradually exhuming the buried structure. A southerly flowing stream drains the depression and has breached the "rim" to the south. Evidence for impact at Yallalie: Quartz grains taken from the core at a depth of 430-460 m in the Yallalie 1 well show widesprad development of prismatic cleavage fractures and irregular, slightly curved planes formed by brittle fracture. Quartz grains from a depth of 150-180 m in the well are essentially undeformed (McInerney, 1991). However, multiple sets of closely spaced planar features in quartz, characteristic of highly shocked rocks, have yet to be observed in core material from the Yallalie structure. Nevertheless, the morphology of the Yallalie structure determined from geophysical data suggests strongly that it is of impact origin. Work is continuing on the core material to search for diagnostic shock-metamorhic effects, and to constrain the age of the structure. References Cockbain A. E. (1990) In Geology and Mineral Resources of Western Australia, Western Australia Geological Survey, Memoir 3, pp. 514-516. Dence M. R., Grieve R. A. F., and Robertson P. B. (1977) In Impact and Explosion Cratering (eds. D. J. Roddy, R. O. Pepin, and R. B. Merrill), Pergamon Press, pp. 247-275. McInerney K. B. (1991) Honors Thesis (unpublished), University of Western Australia.

Dentith, M. C.; Bevan, A. W. R.; McInerney, K. B.

1992-07-01

384

Preliminary trial to investigate temperature of the iPulse intense pulsed light (IPL) glass transmission block during treatment of Fitzpatrick II, IV, V, and VI skin types  

Microsoft Academic Search

The glass transmission block, a key component of all intense pulsed light (IPL) devices, is responsible for the delivery of\\u000a IPL energy from the xenon discharge lamp to hair and skin structures during treatment. The purpose of this study was to investigate\\u000a the variation in temperature of the quartz glass block used in the iPulse (CyDen, Swansea, UK) handset during

C. Ash; G. A. Town; G. R. Martin

2007-01-01

385

Preliminary investigation on safety of post-UV disinfection of wastewater: bio-stability in laboratory-scale simulated reuse water pipelines  

Microsoft Academic Search

The bio-stability of ultraviolet disinfected reused water from a tertiary biological wastewater treatment plant was investigated, using laboratory-scale simulated static water pipelines. UV disinfection was found not to be able to maintain its disinfection effect over a few days, such that the total bacterial count increased up to the same level as that for non-disinfected samples in only 5 days.

Meiting Guo; Hongying Hu; Wenjun Liu

2009-01-01

386

Portable XRF as a valuable device for preliminary in situ pigment investigation of wooden inventory in the Trski Vrh Church in Croatia  

Microsoft Academic Search

The aim of this work was the investigation of pigments from the painted wooden inventory of the pilgrimage church of Saint\\u000a Mary of Jerusalem in Trski Vrh one of the most beautiful late-baroque sacral ensembles in Croatia. Being an object of high\\u000a relevance for the national cultural heritage, an extensive research on the wooden polychromy was undertaken in order

V. Desnica; K. kari?; D. Jembrih-Simbuerger; S. Fazinic; M. Jaksic; D. Mudronja; M. Pavlicic; I. Perani?; M. Schreiner

2008-01-01

387

White matter integrity, as measured by diffusion tensor imaging, distinguishes between impaired and unimpaired older adult decision-makers: A preliminary investigation  

Microsoft Academic Search

In the context of normal ageing, some individuals experience cognitive changes that affect their decision-making abilities. We investigated whether such cognitive changes could be related to the integrity of cortical white matter, as measured by diffusion tensor imaging (DTI). Participants were administered a well-validated laboratory decision-making task, and were subsequently grouped as either poor decision-makers (older-impaired, n=9) or strong decision-makers

J. C. Timpe; K. C. Rowe; J. Matsui; V. A. Magnotta; N. L. Denburg

2011-01-01

388

Preliminary investigation on the production of fuels and bio-char from Chlamydomonas reinhardtii biomass residue after bio-hydrogen production  

Microsoft Academic Search

The aim of this work was to investigate the potential conversion of Chlamydomonas reinhardtii biomass harvested after hydrogen production. The spent algal biomass was converted into nitrogen-rich bio-char, biodiesel and pyrolysis oil (bio-oil). The yield of lipids (algal oil), obtained by solvent extraction, was 152% w\\/wdry-biomass. This oil was converted into biodiesel with a 8.71% w\\/wdry-biomass yield. The extraction residue

Cristian Torri; Chiara Samor; Alessio Adamiano; Daniele Fabbri; Cecilia Faraloni; Giuseppe Torzillo

2011-01-01

389

Pain Intensity, Psychological Inflexibility, and Acceptance of Pain as Predictors of Functioning in Adolescents with Juvenile Idiopathic Arthritis: A Preliminary Investigation  

Microsoft Academic Search

Juvenile Idiopathic Arthritis (JIA) is a chronic rheumatic disease associated with pain and maladjustment. This study investigated\\u000a whether pain, acceptance of pain, and psychological inflexibility uniquely predicted functional disability, anxiety, general\\u000a quality of life (QOL), and health-related quality of life (HQOL) among adolescents with JIA. Twenty-three adolescents with\\u000a JIA and pain were recruited from a pediatric rheumatology clinic. Participants completed

Amanda B. FeinsteinEvan; Evan M. Forman; Akihiko Masuda; Lindsey L. Cohen; James D. Herbert; L. Nandini Moorthy; Donald P. Goldsmith

390

Testing the Predictions of the Central Capacity Sharing Model  

ERIC Educational Resources Information Center

|The divergent predictions of 2 models of dual-task performance are investigated. The central bottleneck and central capacity sharing models argue that a central stage of information processing is capacity limited, whereas stages before and after are capacity free. The models disagree about the nature of this central capacity limitation. The

Tombu, Michael; Jolicoeur, Pierre

2005-01-01

391

[Capacity for peripheral nerve regeneration. Experimental study--preliminary results].  

PubMed

Any injury affecting peripheral nerve continuity is followed by a degenerative reaction from nerve itself and its muscule. Nerve regeneration is possibly when the two ends are put in direct contact (direct suture), proximity (autologus or artificial grafts) or through muscle neurotization. The aim of this experimental study was to evaluate sciatic nerve degeneration and regeneration in rat after no suture (group 1), direct suture (group 2), nerve grafting (group 3) and muscle neurotization (group 4). Nerve samples were analyzed in optical microscopy at 8 and 16 weeks after surgery and nerve degeneration (group 1), axonal growth (group 2) and neuromuscular regeneration (group 4) were evaluated. Neuromuscular synapses after direct muscular neurotization are to be searched using the cholinesterase test. PMID:20509290

Per?ea, Mihaela; Lunc?, S

392

[Aqueous humor outflow capacity after argon laser trabeculoplasty. Preliminary report].  

PubMed

In a prospective study of 44 eyes with open angle-glaucoma and 27 with pseudocapsular glaucoma, the aqueous humor outflow facility was controlled for up to 12 months following argon laser trabeculoplasty (ALT). The average increase in the facility of outflow, which was 70% in open-angle glaucoma, was 25% higher in pseudocapsular glaucoma. In successful ALT, this increase in outflow facility was established within the first 20 hours after coagulation and did not decrease during the following year. There were no major complications such as transitory elevations of intraocular pressure, hyphema, or severe uveitis; this fact is interpreted as a result of the authors' technique, in which only the light-pigmented trabecular meshwork is coagulated. PMID:4039773

Mert, H J; von Denffer, H; Hirsch, B

1985-03-01

393

Preliminary Listing of Municipal Waste Water Treatment Capacities.  

National Technical Information Service (NTIS)

This publication is a current listing of available data on waste water treatment facilities of all U.S. communities with a served population of over 2,000. The data are presented alphabetically by state and alphabetically by community name within each sta...

1976-01-01

394

Enhanced capacity CCD  

Microsoft Academic Search

This paper introduces a method for enhancing the charge capacity and lowering the leakage current in CCD's. The two-phase coplanar electrode structure is chosen as a vehicle for demonstrating the concept. The charge capacity enhancement is achieved by a combination of p-type and n-type implantations. This method of charge capacity enhancement relies on the increase of depletion capacitance in the

P. K. Chatterjee; A. F. Tasch; Horng-Sen Fu; T. C. Holloway

1978-01-01

395

[Clinical analysis of cardiac arrhythmias in patients with chronic renal failure treated conservatively. II. Evaluation of the relationship between cardiac arrhythmias and some echocardiographic indices--preliminary investigations].  

PubMed

Cardiac arrhythmias detected during 24-hr electrocardiographic Holter monitoring were correlated with some echocardiographic indices in 20 patients chronic renal failure (c.r.f.) on conservative treatment (10 women and 10 men, aged 43.6 +/- 9.8 years). Comparative groups consisted of 10 patients with chronic primary glomerulonephritis without arterial hypertension and renal failure (2 women and 8 men, aged 34.2 +/- 10.5 years), and 10 patients with primary arterial hypertension without clinical symptoms of renal disease (1 woman and 9 men, aged 36.6 +/- 9.5 years). In c.r.f. patients echocardiographic investigations disclosed that the left atrial diastolic dimension was within a normal range. The right ventricular diastolic dimension (RVDD) was, left ventricular systolic (LVDS) and diastolic (LVDD) dimensions and left ventricular end-diastolic volume (LVEDV) were slightly increased. The left ventricular ejection fraction (EF) was significantly lowered. In c.r.f. patients the left ventricular mass (LVM) was increased to approximately 300 g. In c.r.f. patients a significant positive correlation was found between number of ventricular extrasystoles registered within 24 hrs and RVDD. The investigation disclosed that: 1) in c.r.f. patients with arterial hypertension showed ultrasonographic signs of hypertrophic-dilated cardiomyopathy with impaired left ventricular ejection fraction; 2) in c.r.f. patients incidence and nature of cardiac arrhythmias were independent of LVM, LVDD and LVDS; 3) numbers of ventricular extrasystoles registered within 24 hrs can increase with the increase in RVDD and the decrease in EF. PMID:8146049

Mamczur, D; Kidawa, Z; Dryja?ski, T

1993-12-01

396

Photoprotective capacities of lichen metabolites: a joint theoretical and experimental study.  

PubMed

The adaptative capacity of lichens to UV radiation could be expressed by the production of photo-absorbing secondary metabolites in thalli. A preliminary screening performed on twelve lichen species by high performance thin layer chromatography (HPTLC) revealed five major compounds absorbing in the UVA (315-400nm) or UVB (280-315nm) ranges in Diploicia canescens. After phytochemical investigation of this lichen, twelve metabolites have been isolated and characterized. Those obtained in sufficient quantities were evaluated for their photoprotective capacities and compared to three referent sunscreens. Experimental spectra were compared to theoretical spectra as obtained at the TD-DFT level of theory. Different DFT functionals were tested to accurately reproduce the UV/Vis spectra of five depsidones, one diphenylether and two bisxanthones. Results indicate that absorption wavelengths and molecular extinction coefficients (oscillator strengths) obtained for the bisxanthones were similar to those of the UVA referent sunscreen. PMID:22516892

Millot, Marion; Di Meo, Florent; Tomasi, Sophie; Boustie, Jol; Trouillas, Patrick

2012-03-24

397

Heat Capacity Analysis Report  

SciTech Connect

The purpose of this report is to provide heat capacity values for the host and surrounding rock layers for the waste repository at Yucca Mountain. The heat capacity representations provided by this analysis are used in unsaturated zone (UZ) flow, transport, and coupled processes numerical modeling activities, and in thermal analyses as part of the design of the repository to support the license application. Among the reports that use the heat capacity values estimated in this report are the ''Multiscale Thermohydrologic Model'' report, the ''Drift Degradation Analysis'' report, the ''Ventilation Model and Analysis Report, the Igneous Intrusion Impacts on Waste Packages and Waste Forms'' report, the ''Dike/Drift Interactions report, the Drift-Scale Coupled Processes (DST and TH Seepage) Models'' report, and the ''In-Drift Natural Convection and Condensation'' report. The specific objective of this study is to determine the rock-grain and rock-mass heat capacities for the geologic stratigraphy identified in the ''Mineralogic Model (MM3.0) Report'' (BSC 2004 [DIRS 170031], Table 1-1). This report provides estimates of the heat capacity for all stratigraphic layers except the Paleozoic, for which the mineralogic abundance data required to estimate the heat capacity are not available. The temperature range of interest in this analysis is 25 C to 325 C. This interval is broken into three separate temperature sub-intervals: 25 C to 95 C, 95 C to 114 C, and 114 C to 325 C, which correspond to the preboiling, trans-boiling, and postboiling regimes. Heat capacity is defined as the amount of energy required to raise the temperature of a unit mass of material by one degree (Nimick and Connolly 1991 [DIRS 100690], p. 5). The rock-grain heat capacity is defined as the heat capacity of the rock solids (minerals), and does not include the effect of water that exists in the rock pores. By comparison, the rock-mass heat capacity considers the heat capacity of both solids and pore water. For temperatures in the trans-boiling regime (95 C to 114 C), the additional energy required to vaporize the pore water is accounted for in the rock-mass heat capacity. The rock-grain heat capacities are intended to be used in models and analyses that explicitly account for the thermodynamic effects of the water within the rock porosity. The rock-mass heat capacities are intended to be used in models and analyses that do not explicitly account for these thermodynamic effects, particularly boiling. The term specific heat is often used synonymously with heat capacity; however, the latter term is used throughout this document.

A. Findikakis

2004-11-01

398

Preliminary investigation of the effects of mineralogy and fluid composition on the growth of thermophilic bacteria in geothermal hot springs on the island of Vulcano, Italy  

SciTech Connect

Hydrothermal experiments were carried out recently on the island of Vulcano to investigate at in situ temperatures the relation of thermophilic bacterial growth to the mineralogy and fluid chemistry of geothermal hot springs. A preheated nutrient medium was inoculated with geothermal fluid and placed in the hydrothermal reactor, together with a sample of the mineralogic matrix through which the fluid flows. The results of the experiments are somewhat equivocal owing to (1) the inability to maintain the pH of the reactor fluid at the in situ pH (2.9 at 98 C), (2) apparent phase separation of what is probably a CO[sub 2]-rich gas leading to abnormally high pressures as the reactor temperature was increased in stages to 125 C, and (3) the fact that (unexpectedly) all of the bacteria were found to occur on the surfaces of mineral grains, which could not be sequentially collected in a representative manner with the apparatus at hand. Nevertheless, it appeared qualitatively that the population of bacteria increased during the experiment. Although this observation requires future confirmation and quantification with a more sophisticated reactor, the experimental results clearly indicate that conventional microbiological growth experiments using thermophilic bacteria that have been removed from their natural nutrient, in situ pH, and mineralogic environment may have little to do with the behavior of such bacteria in geothermal systems. Understanding this behavior requires integrated studies of the organobiogeochemistry of geothermal systems.

Amend, J.P.; Helgeson, H.C. (Univ. of California, Berkeley, CA (United States). Dept. of Geology and Geophysics); Gurrieri, S.; Valenza, M. (Inst. di Geochimica dei Fluidi, Palermo (Italy)); Clark, D.S. (Univ. of California, Berkeley, CA (United States). Dept. of Chemical Engineering)

1992-01-01

399

A preliminary investigation of pre-dispersal seed predation by Acanthoscelides schrankiae Horn (Coleoptera: Bruchidae) in Mimosa bimucronata (DC.) Kuntze trees.  

PubMed

This is the first record of Acanthoscelides schrankiae Horn. feeding in seeds of Mimosa bimucronata (DC.) Kuntze. We investigated the pattern of oviposition and seed exploitation by A. schrankiae, and the distribution of mature fruits and seed predation in the inflorescences. We also compared the percentage of predated seeds, the total dry weight of fruits and non-predated seeds, the percentage of aborted seeds, and the percentage of non-emergent insects, among different quadrants of the M. bimucronata canopy. To determine the occurring species, the emergence of bruchids and parasitoids was observed in the laboratory, resulting altogether, only in individuals of A. schrankiae and Horismenus sp. (Hymenoptera: Eulophidae) species, respectively. Mean number of fruits produced in the median region of inflorescence was significantly higher than in the inferior and superior regions, and the frequencies (observed and expected) of predated and non-predated seeds differed among the different regions of inflorescence. Females of A. schrankiae laid their eggs on fruits, and larvae, after emergence, perforated the exocarp to reach the seeds. Most fruits presented one to three eggs and only one bruchid larva was observed in each seed. The highest value of the rate "number of eggs/fruit" and the highest percentage of predated seeds were recorded in April. Dry weight of fruits (total) and seeds (non-predated), proportions of predated seeds, seed abortions, and non-emergent seed predators, were evenly distributed in the canopy. PMID:17607452

Silva, Laura A; Maimoni-Rodella, Rita C S; Rossi, Marcelo N

400

Preliminary investigation of the NMR, optical and x-ray CT dose-response of polymer gel dosimeters incorporating cosolvents to improve dose sensitivity  

NASA Astrophysics Data System (ADS)

This study reports on efforts to increase the dose sensitivity of polymer gel dosimeters used in 3D radiation dosimetry. The potential of several different cosolvents is investigated, with the aim of increasing the solubility of N,N'-methylene-bisacrylamide crosslinker in polymer gel dosimeters. Glycerol and isopropanol increase the limit for the crosslinker solubility from approximately 3% to 5% and 10% by weight, respectively. This enables the manufacture of polymer gel dosimeters with much higher levels of crosslinking than was previously possible. New dosimeter recipes containing up to 5 wt% N,N'-methylene-bisacrylamide were subjected to spatially uniform radiation and were studied using nuclear magnetic resonance (NMR), as well as x-ray and optical CT techniques. The resulting dosimeters exhibit dose sensitivities that are up to 2.7 times higher than measured for a typical dosimeters with 3% N,N'-methylene-bisacrylamide without the addition of cosolvent. Two additional cosolvents (n-propanol and sec-butanol) were deemed unsuitable for practical dosimeters due to incompatibility with gelatin, cloudiness prior to irradiation, and immiscibility with water when large quantities of cosolvent were used. The dosimeters with high N,N'-methylene-bisacrylamide content that used isopropanol or glycerol as cosolvents had high optical clarity prior to irradiation, but did not produce suitable optical CT results for non-uniformly irradiated gels due to polymer development outside of the high dose regions of the pencil beams and significant light scatter. Further experiments are required to determine whether cosolvents can be used to manufacture gels with sufficiently high dose sensitivity for readout using x-ray computed tomography.

Koeva, V. I.; Olding, T.; Jirasek, A.; Schreiner, L. J.; McAuley, K. B.

2009-05-01

401

Liquid heat capacity lasers  

DOEpatents

The heat capacity laser concept is extended to systems in which the heat capacity lasing media is a liquid. The laser active liquid is circulated from a reservoir (where the bulk of the media and hence waste heat resides) through a channel so configured for both optical pumping of the media for gain and for light amplification from the resulting gain.

Comaskey, Brian J. (Walnut Creek, CA); Scheibner, Karl F. (Tracy, CA); Ault, Earl R. (Livermore, CA)

2007-05-01

402

Cutaneous Channel Capacity.  

National Technical Information Service (NTIS)

This report discusses experiments to measure the upper limit of cutaneous channel capacity using a simple binary signal. The limit channel capacity appears to be in the neighborhood of 50 bits/sec. This compared with 8,000 to 10,000 bits/sec for the human...

K. Kokjer

1966-01-01

403

Variable capacity gasification burner  

Microsoft Academic Search

A variable capacity burner that may be used in gasification processes, the burner being adjustable when operating in its intended operating environment to operate at two different flow capacities, with the adjustable parts being dynamically sealed within a statically sealed structural arrangement to prevent dangerous blow-outs of the reactants to the atmosphere.

Saxon

1985-01-01

404

Prospects for OPEC capacity  

Microsoft Academic Search

OPEC capacity is not exogenous, but responds to demand. Price increases have not been caused by capacity shortages. OPEC nations find it hard to set aside even very small portions of their revenues for oil investment, despite its extreme profitability. Foreign investors face high risks. Production sharing makes their after-tax return even more unstable.

MA Adelman

1995-01-01

405

Nanofluid heat capacities  

NASA Astrophysics Data System (ADS)

Significant increases in the heat capacity of heat transfer fluids are needed not only to reduce the costs of liquid heating and cooling processes, but also to bring clean energy producing technologies like concentrating solar power (CSP) to price parity with conventional energy generation. It has been postulated that nanofluids could have higher heat capacities than conventional fluids. In this work, nano- and micron-sized particles were added to five base fluids (poly-? olefin, mineral oil, ethylene glycol, a mixture of water and ethylene glycol, and calcium nitrate tetrahydrate), and the resulting heat capacities were measured and compared with those of the neat base fluids and the weighted average of the heat capacities of the components. The particles used were inert metals and metal oxides that did not undergo any phase transitions over the temperature range studied. In the nanofluids studied here, we found no increase in heat capacity upon the addition of the particles larger than the experimental error.

Starace, Anne K.; Gomez, Judith C.; Wang, Jun; Pradhan, Sulolit; Glatzmaier, Greg C.

2011-12-01

406

Study of intermolecular contacts in proteins and oligomer interfaces and preliminary investigations into the design and production of nanomaterials from proteins  

NASA Astrophysics Data System (ADS)

The first part of this research involved a study of the nature and extent of nonbonded interactions at crystal and oligomer interfaces. A survey was compiled of several characteristics of intersubunit contacts in 58 different oligomeric proteins, and of the intermolecular contacts in 223 protein crystal structures. Routines written in "S" language were utilized for the generation of the observed and expected contacts. The information in the Protein Data Bank (PDB) was extracted using the database management system, Protein Knowledge Base (PKB). Potentials of mean force for atom-atom contacts and residue-residue contacts were derived by comparison of the number of observed interactions with the number expected by mass action. Preference association matrices and log-linear analyses were applied to determine the different factors that could contribute to the overall interactions at the interfaces of oligomers and crystals. Surface patches at oligomer and crystal interfaces were also studied to further investigate the origin of the differences in their stabilities. Total number of atoms in contact and the secondary structure elements involved are similar in the two types of interfaces. Crystal contacts result from more numerous interactions by polar residues, compared with a tendency toward nonpolar amino acid prominent in oligomer interfaces. Contact potentials indicate that hydrophobic interactions at oligomer interfaces favor aromatic amino acids and methionine over aliphatic amino acids; and that crystal contacts form in such a way as to avoid inclusion of hydrophobic interactions. The second part involved the development of a new class of biomaterials from two-dimensional arrays of ordered proteins. Point mutations were planned to introduce cysteine residues at appropriate locations to enable cross-linking at the molecular interface within given crystallographic planes. Crystallization and subsequent cross-linking of the modified protein would lead to the formation of arrays on subsequent dissociation of the crystal. Novel protein architectures can be generated from these cross-linked nanostructures. Experiments with model protein, maltose-binding protein (MBP) were performed to develop purification, cross-linking and crystallization techniques. The long-term goal of this project is to apply the experience gained with MBP to the fabrication of nanomaterials from other, application-specific proteins for ultrafiltration and microelectronic devices.

Iyer, Ganesh Hariharan

407

Preliminary investigations on ethyl glucuronide and ethyl sulfate cutoffs for detecting alcohol consumption on the basis of an ingestion experiment and on data from withdrawal treatment.  

PubMed

Ethyl glucuronide (EtG) and ethyl sulfate (EtS) are commonly used alcohol markers for previous alcohol consumption. Nevertheless, the optimum EtG cutoff for urinary abstinence tests is still being discussed, and no cutoff has been recommended for EtS yet. The aim of this study was to verify cutoffs by investigating EtG and EtS concentrations (c(EtG) and c(EtS)) in the urine of healthy persons after drinking small, but realistic amounts of alcohol (one or two glasses of beer or white wine), and to look for the window of detection in strongly alcohol-intoxicated patients who were beginning withdrawal treatment. Very high EtG and EtS concentrations were measured in the first urine samples of patients under withdrawal treatment. However, 24 h later, concentrations decreased considerably, and c (EtG)?

Albermann, Maria Elena; Musshoff, Frank; Doberentz, Elke; Heese, Peter; Banger, Markus; Madea, Burkhard

2012-06-30

408

Investigation of a hydrological system related to the stability of slope sediments off the Nice Aiport, Ligurian Sea - preliminary data and a sketch for a MSP drilling proposal  

NASA Astrophysics Data System (ADS)

The sedimentary instability of submarine slopes poses a major geohazard and threatens coastal infrastructure both on- and offshore. The Ligurian Margin, Southern France, represents such a potentially unstable slope where factors favouring instability include seismicity, groundwater charging, presence of weak minerals, high sediment accumulation rates, anthropogenic impact by construction, and slope oversteepening. On the 16th of October 1979 a major submarine landslide (~8.7 km2) affected the coastal system offshore Nice and resulted in destruction of an embankment at the Nice airport, a debris flow cutting two submarine cables tens of kilometres away from the sliding area, and a tsunami wave of 2-3 m at the nearby coast. It was proposed several years ago that overpressuring linked to the hydrogeological condition could have been the trigger mechanism of the Nice Airport failure, and seawater composition in this area further suggested that fresh ground water is released offshore by coastal aquifers. The hydrogeological triggering model is also supported by sedimentary and seismic data indicating that gently seaward-dipping permeable layers of sediment may provide aquifer pathways down to a maximum depth of 150 m. An investigation of the superficial sediments (max. 30 mbsf) was recently performed in close collaboration between France (e.g. PRISME cruise with RV L'Atalante, 2007) and Germany (e.g. M73 cruise with RV Meteor, 2007). The study included geophysical acquisition, in situ pore pressure and shear strength measurements (CPTU devices, Penfeld penetrometer) as well as gravity coring. For long- and mid-term measurements, piezometers, which acquire the pore pressure at five different depth levels within the sediment, were installed by IFREMER Brest, France. Short-term measurements were carried out with the marine shallow-water FF-CPTU probe by the MARUM Bremen, Germany, while geochemical analysis was performed on pore water extracted from the cores. The main results at this stage include: Long-term pore pressure measurements (Nov 2006 - Nov 2007) in the scar of the 1979 landslide with a piezometer indicate a direct relationship to precipitation events, as the variability of the measured pore pressure follows the rate of rainfall. Mid-term pore pressure records (34 h) acquired in the landslide scar at different depth levels show contrasting pore pressure evolutions. At 4.25 m below seafloor an increase of pore pressure (~2 kPa) over time could be observed, whereas the pressure in the other levels steadily decreases over time. FF-CPTU short-term deployments (25-310 mins) in the area of the Nice Airport indicate higher than hydrostatic pore pressures in sediments in the upper part of the slope, close to the scar of the 1979 landslide. Geochemical analyses of pore waters from the overpressured sediment layers show salinities of 5-50% seawater (SW) concentration and depletion in other constituents (e.g. Cl, Fe, sulfate). Cores E or W of the landslide scar in the undisturbed slope show regular SW profiles, which reveal that the zone of freshening (i.e. groundwater charging through coarse-grained, permeable sands/gravels) is limited in extension, or lies at a deeper level there than in the landslide scar. ROV surveys indicate that parts of the surface sediment is currently creeping. The Nice airport area is now the focus of a mission-specific (MSP) drilling proposal to study the regional extension of the fluid-charged, metastable slope along the French Riviera. This portion of the Mediterranean coastline receives millions of tourists each year and comprises valuable infrastructure all along. Understanding the preconditioning factors and governing trigger mechanisms for near-shore submarine slope instability is one of the key objectives to be addressed. We hence propose a low-cost drilling project in an area of highest societal and scientific relevance. Both natural and anthropogenic factors can be easily quantified at this location, and a link to long-term monitoring projects is established through the EU

Henry, P.; Stegmann, S.; Sultan, N.; Sage, F.; Migeon, S.; Kopf, A.

2009-04-01

409

THORIUM IN IRON METEORITES: A PRELIMINARY INVESTIGATION  

Microsoft Academic Search

By means of neutron activation analysis, thorium concentrations ln two ; iron meteorites have been found in the approximate range of from 6 x 10⁻¹² ; to 20 x l0⁻¹² g Th\\/g meteorite. These values are lower by at least two ; orders of magnitude than previoualy detsrmined levels of thorium concentration in ; trons. It is possible that the

G. L. bate; H. A. Potratz; J. R. Huizenga

1958-01-01

410

Thorium in iron meteorites: a preliminary investigation  

Microsoft Academic Search

By means of neutron activation analysis, thorium concentrations in two iron meteorites have been found in the approximate range of from 6 10 -12 to 20 10 -12 g Th \\/ g meteorite. These values are lower by at least two orders of magnitude than previously determined levels of thorium concentration in irons. It is possible that the

G. L. Bate; H. A. Potratz; R. J. Huizenga

1958-01-01

411

Controlling an Anthropomimetic Robot: A Preliminary Investigation  

Microsoft Academic Search

The human body has a complex skeleton, giving a very high number of degrees of freedom, and is actuated by a large number\\u000a of elastic elements muscles and tendons. As a consequence, it has extremely challenging dynamics. Conventional humanoid\\u000a robots use reduced degrees of freedom and traditional stiff actuators, and so fail to capture or exploit the important dynamic

Hugo Gravato Marques; Richard Newcombe; Owen Holland

2007-01-01

412

Preliminary geothermal investigations in West Virginia  

SciTech Connect

Deep sedimentary basins and warm spring systems are potential geothermal resources in West Virginia. A temperature gradient map based on 800 BHT for WV shows that variation of temperature gradients trend NE parallel to regional structure. Highest temperature gradient values of about 28/sup 0/C/km occur in the eastcentral WV and the lowest gradients (18/sup 0/C/km) are found over the Rome trough. Results of groundwater geochemistry indicate that the warm springs circulate in very shallow aquifers and are subject to seasonal temperature fluctuations. Silica heat flow data in WV varies from about .89 to 1.4 HFU and generally increases towards the west. Bouguer, magnetic and temperature gradient profiles suggest that an ancient rift transects the State and is the site of several deep sedimentary basins.

Hendry, R. (State Univ. of New York/Buffalo, Amherst); Hilfiker, K.; Hodge, D.; Morgan, P.; Swanberg, C.

1981-10-01

413

Preliminary subsidence investigation of Sacramento Valley, California  

USGS Publications Warehouse

Although a number of agencies have made leveling surveys in Sacramento Valley and a valleywide network of first- and second-order control exists, few areas have sufficient control for determining whether land subsidence has occurred and if so, how much, within the time span of vertical control. Available data suggest that 0.2 to 0.9 foot (0.06 to 0.3 m) of subsidence probably has occurred from 1935-42 to 1964 in an extensive agricultural area of heavy ground-water pumping between Zamora and Davis, and that as much as 2 feet (0.6 m) of subsidence has occurred in at least two areas of pumping overdraft--east of Zamora, and west of Arbuckle. A comparison of maps showing long-term water-level decline and average annual ground-water pumpage indicates several other areas of probable subsidence. In six general areas--northwest of Sacramento; northeast of Sacramento; southeast of Yuba City; 10 miles (16 km) north of Willows; 20 miles (32 km) north of Willows; and especially in the Arbuckle area,ground-water declines have quite probably produced significant subsidence. In two areas of most intensive pumping, no long-term water-level declines have occurred, and no subsidence is indicated. If problems of land subsidence are of concern in Sacramento Valley, and if estimates of historic subsidence or subsidence potential are needed, serious consideration should be given to a field program of basic-data collection. Second-order leveling along a few carefully selected lines of existing control, and the installation and operation of two or three compaction recorders in areas of continuing water-level decline, would provide helpful data for estimating .past and future subsidence.

Lofgren, B. E.; Ireland, R. L.

1973-01-01

414

A preliminary scientometric investigation of malaria research  

Microsoft Academic Search

An analysis of2275 papers on malaria research published in journals and indexed by Commonwealth Agricuitural Bureaux International (CABI) CD-ROM incorporating Tropical Diseases Bulletin (TDB), and Pub Med Medline (web edition) in 1990 and 2000 indicates that the Science Citation Index (SCI) covered only about 68% of the output indexed by CAB! and Pub Med. Malaria research output is highly scattered

B. Dutt; Suresh Kumar; Pusa Gate

2006-01-01

415

Psychache and Suicide: A Preliminary Investigation  

ERIC Educational Resources Information Center

|Shneidman's Psychological Pain Assessment Scale (PPAS; 1999) was administered to 88 psychiatric patients. Both current and worst-ever psychache were significantly higher in those patients judged by a psychiatrist, on the basis of a structured clinical interview, to be at risk of suicide. However, current and worst-ever psychache were not

Pompili, Maurizio; Lester, David; Leenaars, Antoon A.; Tatarelli, Roberto; Girardi, Paolo

2008-01-01

416

Psychache and Suicide: A Preliminary Investigation  

ERIC Educational Resources Information Center

Shneidman's Psychological Pain Assessment Scale (PPAS; 1999) was administered to 88 psychiatric patients. Both current and worst-ever psychache were significantly higher in those patients judged by a psychiatrist, on the basis of a structured clinical interview, to be at risk of suicide. However, current and worst-ever psychache were not

Pompili, Maurizio; Lester, David; Leenaars, Antoon A.; Tatarelli, Roberto; Girardi, Paolo

2008-01-01

417

Forward capacity market CONEfusion  

SciTech Connect

In ISO New England and PJM it was assumed that sponsors of new capacity projects would offer them into the newly established forward centralized capacity markets at prices based on their levelized net cost of new entry, or ''Net CONE.'' But the FCCMs have not operated in the way their proponents had expected. To clear up the CONEfusion, FCCM designs should be reconsidered to adapt them to the changing circumstances and to be grounded in realistic expectations of market conduct. (author)

Wilson, James F.

2010-11-15

418

Refinery Capacity Report 2009  

EIA Publications

Data series include fuel, electricity, and steam purchased for consumption at the refinery; refinery receipts of crude oil by method of transportation; current and projected capacities for atmospheric crude oil distillation, downstream charge, production, and storage capacities. Respondents are operators of all operating and idle petroleum refineries (including new refineries under construction) and refineries shut down during the previous year, located in the 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, and other U.S. possessions.

Information Center

2009-06-25

419

Refinery Capacity Report 2007  

EIA Publications

Data series include fuel, electricity, and steam purchased for consumption at the refinery; refinery receipts of crude oil by method of transportation; current and projected capacities for atmospheric crude oil distillation, downstream charge, production, and storage capacities. Respondents are operators of all operating and idle petroleum refineries (including new refineries under construction) and refineries shut down during the previous year, located in the 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, and other U.S. possessions.

Information Center

2007-06-29

420

Refinery Capacity Report 2008  

EIA Publications

Data series include fuel, electricity, and steam purchased for consumption at the refinery; refinery receipts of crude oil by method of transportation; current and projected capacities for atmospheric crude oil distillation, downstream charge, production, and storage capacities. Respondents are operators of all operating and idle petroleum refineries (including new refineries under construction) and refineries shut down during the previous year, located in the 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, and other U.S. possessions.

Information Center

2008-06-20

421

77 FR 13631 - Drawn Stainless Steel Sinks From China; Institution and Scheduling of Preliminary Phase...  

Federal Register 2010, 2011, 2012, 2013

...INTERNATIONAL TRADE COMMISSION [Investigation Nos. 701-TA-489 and 731-TA-1201 (Preliminary)] Drawn Stainless Steel Sinks...antidumping and countervailing duty investigations Nos. 701-TA-489 and 731-TA-1201 (Preliminary) under...

2012-03-07

422

Study on Traffic carrying capacity of Tangshan City  

Microsoft Academic Search

capacity calculation model based on time and space consuming method is used to analyse Traffic carrying capacity problems in Tangshan City. the the traffic carrying capacity of Tangshan City, are analyzed.Structure through the traffic situation and traffic investigation and study on the defects in Tangshan and traffic problems to be solved fully analyzed.On this basis, the paper on economic development,

Chao Chen; Zhang Yabin

2011-01-01

423

Capacity and mutual information of wideband multipath fading channels  

Microsoft Academic Search

We investigate the capacity and mutual information of a broadband fading channel consisting of a finite number of time-varying paths. We show that the capacity of the channel in the wideband limit is the same as that of a wideband Gaussian channel with the same average received power. However, the input signals needed to achieve the capacity must be peaky

. Emre Telatar; David N. C. Tse

2000-01-01

424

Capacity and Mutual Information of Wideband Multipath Fading Channels  

Microsoft Academic Search

In this paper we will investigate the capacity and mutual information of a broadbandfading channel consisting of a finite number of time-varying paths. We willshow that the capacity of the channel in the wideband limit is the same as thatof a wideband Gaussian channel with the same average received power. However,the input signals needed to achieve the capacity must be

Emre Telatar; David Tse

1999-01-01

425

Capacity and mutual information of broadband multipath fading channels  

Microsoft Academic Search

We investigate the capacity and mutual information of a broadband fading channel consisting of a finite number of time-varying paths. We show that the capacity of the channel in the wide band limit is the same as that of a wide band Gaussian channel with the same average received power. However, the input signals needed to achieve the capacity must

I. Emre Telatar; D. Tse

1998-01-01

426

Redox internal capacity improvement  

Microsoft Academic Search

This review indicates the present limiting capacities within the Redox plant and presents courses of action necessary to realize an instantaneous rate of 12\\/TD. The changes contemplated to reach this goal are time cycle reductions, procedural changes, and equipment changes which can be undertaken and achieved by the Redox organization presumably without recourse to project funds or special authorizations. The

Beaulieu

1955-01-01

427

MIMO capacity with interference  

Microsoft Academic Search

System capacity is considered for a group of interfering users employing single-user detection and multiple transmit and receive antennas for flat Rayleigh-fading channels with independent fading coefficients for each path. The focus is on the case where there is no channel state information at the transmitter, but channel state information is assumed at the receiver. It is shown that the

Rick S. Blum

2003-01-01

428

Maximising rotor thermal capacity  

Microsoft Academic Search

Not only is there no uniformity in the method adopted for generator rotor overcurrent protection, but the AVR control algorithms do not directly assess the rotor's temperature. Often, after rotor overcurrent protection has functioned following a sharp increase of excitation current, 90% of the rotor's thermal capacity is still unused. A computationally reliable and fast method has been devised for

W. R. Lachs

2001-01-01

429

Steam-trap capacities  

Microsoft Academic Search

Factors that affect steam-trap capacity are listed and include: trap inlet pressure, trap discharge pressure, subcooling of inlet condensate, static head of condensate on trap, design of the trap, design of the piping. Some of the things that a user might look for in a steam pipe are examined: low installed cost, low maintenance cost, low cost of owning, and

1985-01-01

430

Science Shorts: Maximum Capacity  

NSDL National Science Digital Library

Many adults are more skilled in estimating "how long" and "how far" than in estimating other ways to measure--possibly because of the many instances of linear measurements in our everyday lives. Asking students to think about "how much it will hold" leads to an understanding of three-dimensional space and the attribute of capacity.

Adams, Barbara

2006-10-01

431

[Athletes' physical working capacity].  

PubMed

Physical working capacity (PWC) and maximum oxygen consumption (VO2max) depend on athlete's sports activity. Average amount of PWC for qualified athletes in cyclic kinds of sports activity is 1586+/-339.8 kgm/min (21.8+/-0.638 kgm/min kg), endurance-trained athlete's PWC is 1625+/-359 kgm/min (23.1+/-4.1 kgm/min kg) and speed-power trained athlete's PWC is 1418+/-214 kgm/min (20.3+/-2.76 kgm/min kg). The study of athletes' physical working capacity by PWC170 test allows estimating physical preparation of athletes' organism, but its high indices may not be in straight connection with their sports achievements. Physical working capacity researchers are more objective when they are carried out by four moment PWC170 test compare to standard two moment PWC170 test. The study of PWC170 among preschool children allows including corrections in their motion regime. During the process of training high-qualified athletes' PWC170 can increase compared to hemodynamic indices. Maximum oxygen consumption--VO2max is in straight correlation as with end systolic and diastolic function, as well as with left ventricle mass. As bigger is left ventricle mass as higher are VO2max indices. The study of PWC by specific tests allows determining aerobic-anaerobic and aerobic working capacity among high-qualified wrestlers. PMID:19202224

Svannshvili, R A; Sopromadze, Z G; Kakhabrishvili, Z G; Svannshvili, T R; Maskhuliia, L M

2009-01-01

432

Satiation, capacity, and within-session responding.  

PubMed Central

Responding may change substantially over the course of a session (McSweeney, Hinson, & Cannon, 1996). The role of satiation in this effect was investigated in three experiments. Experiment 1 showed that the capacity of pigeons to consume milo over a 1-hr period was relatively stable across three different methods of measurement. In Experiment 2, pigeons were divided into two groups that differed in their capacity based on one of those measures. Key pecking was then reinforced under a variable-interval 30-s schedule with hopper durations of 2 or 5 s. According to the satiation hypothesis, subjects with small capacities should satiate faster and therefore show greater decreases in food-reinforced responding than would subjects with larger capacities. The results confirmed this prediction and showed that the magnitudes of within-session decreases were better predicted by the amount an animal consumed relative to its capacity than by absolute amount alone. In Experiment 3, each pigeon was prefed 0, 5, 15, or 25 g of milo prior to each session. Consistent with the satiation hypothesis, increases in prefeeding produced lower overall response rates in the smaller capacity subjects than in the larger capacity subjects at each level of prefeeding. These experiments demonstrate the importance of a new variable in the control of behavior, and provide a recommended technique for its measurement.

DeMarse, T B; Killeen, P R; Baker, D

1999-01-01

433

Seismic capacity of switchgear  

SciTech Connect

As part of a component fragility program sponsored by the USNRC, BNL has collected existing information on the seismic capacity of switchgear assemblies from major manufacturers. Existing seismic test data for both low and medium voltage switchgear assemblies have been evaluated and the generic results are presented in this paper. The failure modes are identified and the corresponding generic lower bound capacity levels are established. The test response spectra have been used as a measure of the test vibration input. The results indicate that relays chatter at a very low input level at the base of the switchgear cabinet. This change of state of devices including relays have been observed. Breaker tripping occurs at a higher vibration level. Although the structural failure of internal elements have been noticed, the overall switchgear cabinet structure withstands a high vibration level. 5 refs., 2 figs., 2 tabs.

Bandyopadhyay, K.; Hofmayer, C.; Kassir, M.; Pepper, S.

1989-01-01

434

Steam-trap capacities  

SciTech Connect

Factors that affect steam-trap capacity are listed and include: trap inlet pressure, trap discharge pressure, subcooling of inlet condensate, static head of condensate on trap, design of the trap, design of the piping. Some of the things that a user might look for in a steam pipe are examined: low installed cost, low maintenance cost, low cost of owning, and maximum performance from the trapped equipment. The author notes that it is no coincidence that heating and ventilating engineers tend to use float-and-thermostative types of traps in large numbers, or that vendors of steam-heated equipment often specify inverted-bucket traps for use on their equipment. They may keep the equipment drained and operating at maximum capacity.

Monroe, E.S.

1985-04-15

435

Lead-acid battery pulse-discharge investigation, phase 2  

NASA Astrophysics Data System (ADS)

In the first phase of the study, the effects of high current pulses caused by electric vehicle controllers on the energy, life, and microstructure of ESB EV-106 batteries were investigated. The above studies showed that there were detrimental effects associated with pulse discharges on the positive plate, and that, while the results require further quantitative analysis, preliminary indications are that the capacity of the batteries exhibited to significant anomalies associated with the pulsed nature of the discharge. The purpose of this study was to obtain preliminary information regarding the following: (1) the relationship between the internal morphological changes of the battery and the numbers of pulsed discharge cycles, and (2) how different sequences of pulsed and steady state discharges affect the internal morphology of the battery. Test procedures and results are detailed.

Dowgiallo, E.; Caulder, S.; Simon, A.

1982-08-01

436

Damping capacity of Fe-Ru alloys  

SciTech Connect

In previous studies, some of the authors have reported that an Fe-17%Mn alloy undergoing non-thermoelastic {gamma}(fcc){r_arrow}{epsilon}(hcp) martensitic transformation possesses a high damping capacity, and that the damping capacity is closely related to the amount of {epsilon} martensite. Blackburn et al. investigated the transformation behaviors of Fe-Ru binary alloys, and reported that Fe-Ru alloys containing above 24%Ru (by weight) experience a {gamma}{r_arrow}{epsilon} martensitic transformation, while Fe-Ru alloys with below 19%Ru undergoes a {gamma}{r_arrow}{alpha}{prime}(bcc) martensitic transformation. it is, thus, expected that the Fe-Ru alloys which undergo a {gamma}{r_arrow}{epsilon} martensitic transformation would exhibit high damping capacity parallel to the Fe-17%Mn alloy. However, there are no studies about the damping properties of a {gamma}{r_arrow}{epsilon} martensitic Fe-Ru alloy. In the present study, the authors investigate the sampling capacity of a {gamma}{r_arrow}{epsilon} martensitic Fe-25%Ru alloy and evaluate the damping mechanisms. In addition, the damping capacity of a {gamma}{r_arrow}{alpha}{prime} martensitic Fe-13%Ru alloy is investigated in comparison with an Fe-25%Ru alloy.

Shin, H.C.; Jun, J.H.; Choi, C.S.

2000-05-10

437

Surface retention capacity calculation  

NASA Astrophysics Data System (ADS)

Flood wave transformation in the floodplain is the phenomenon which is researched within interdisciplinary project NIVA - Water Retention in Floodplains and Possibilities of Retention Capacity Increase. The project focuses on broad range of floodplain ecosystem services and mitigation of flooding is one of them. Despite main influence on flood wave transformation is due to flow retardation, retention in surface depressions within floodplain has been analyzed to get better overview of whole transformation process. Detail digital relief model (DRM) has been used for given purposes to be able to analyze terrain depressions volumes. The model was developed with use of stereophotogrammetric evaluation of airborne images with high resolution of 10 cm. It was essential for purposes of presented analysis not to apply pit removal routines which are often used for generation of DRM for hydrological modelling purposes. First, the methodology of analysis was prepared and tested on artificial surface. This surface was created using random raster generation, filtration and resampling with final resolution of 1000 x 1000 units and height of maximum 10 units above datum. The methodology itself is based on analysis of areas inundated by water at different elevation levels. Volume is than calculated for each depression using extraction of terrain elevations under corresponding water level. The method was then applied on the area of Lunice River floodplain section to assess retention capacity of real floodplain. The floodplain had to be cut into sections perpendicular to main river orientation for analyses as the method was tested for square shaped area without any significant inclination. Results obtained by mentioned analysis are presented in this paper. Acknowledgement Presented research was accomplished within national project NIVA - Water Retention in Floodplains and Possibilities of Retention Capacity Increase, nr. QH82078. The project is funded by Ministry of Agriculture of the Czech Republic. The support is highly acknowledged.

David, Vaclav; Dostal, Tomas

2010-05-01

438

Variable capacity flywheel  

SciTech Connect

A variable capacity flywheel comprises a main flywheel coupled with the rotating shaft of an engine and at least one rotatable auxiliary flywheel. Both are selectively engaged and disengaged with one another by means of an electromagnetic clutch. Both flywheels are engaged with one another by an energizing member in the low speed range of said engine. Both are disengaged from one another by means of excitation control of the electromagnetic clutch in the high speed range of the engine. A generator driven by the engine rotating shaft is connected in series with the electromagnetic clutch and a battery.

Ban, M.

1985-06-04

439

Capacity Utilisation and Excess Capacity: Theory, Evidence, and Policy  

Microsoft Academic Search

This paper models capacity utilisation as a cyclical variable that reflects both the value of precautionary capacity and the desire to hold strategic excess capacity. Business unit data from the Profit Impact on Marketing Strategy (PIMS) database of large, predominantly US, companies are used. Separate estimation is carried out for a number of SIC industry groups. Panel data estimation in

Ciaran Driver

2000-01-01

440

Heat Capacity in Proteins  

NASA Astrophysics Data System (ADS)

Heat capacity (Cp) is one of several major thermodynamic quantities commonly measured in proteins. With more than half a dozen definitions, it is the hardest of these quantities to understand in physical terms, but the richest in insight. There are many ramifications of observed Cp changes: The sign distinguishes apolar from polar solvation. It imparts a temperature (T) dependence to entropy and enthalpy that may change their signs and which of them dominate. Protein unfolding usually has a positive ?Cp, producing a maximum in stability and sometimes cold denaturation. There are two heat capacity contributions, from hydration and protein-protein interactions; which dominates in folding and binding is an open question. Theoretical work to date has dealt mostly with the hydration term and can account, at least semiquantitatively, for the major Cp-related features: the positive and negative Cp of hydration for apolar and polar groups, respectively; the convergence of apolar group hydration entropy at T ? 112C; the decrease in apolar hydration Cp with increasing T; and the T-maximum in protein stability and cold denaturation.

Prabhu, Ninad V.; Sharp, Kim A.

2005-05-01

441

Alkaline solution neutralization capacity of soil.  

PubMed

Alkaline eluate from municipal solid waste (MSW) incineration residue deposited in landfill alkalizes waste and soil layers. From the viewpoint of accelerating stability and preventing heavy metal elution, pH of the landfill layer (waste and daily cover soil) should be controlled. On the other hand, pH of leachate from existing MSW landfill sites is usually approximately neutral. One of the reasons is that daily cover soil can neutralize alkaline solution containing Ca(2+) as cation. However, in landfill layer where various types of wastes and reactions should be taken into consideration, the ability to neutralize alkaline solutions other than Ca(OH)(2) by soil should be evaluated. In this study, the neutralization capacities of various types of soils were measured using Ca(OH)(2) and NaOH solutions. Each soil used in this study showed approximately the same capacity to neutralize both alkaline solutions of Ca(OH)(2) and NaOH. The cation exchange capacity was less than 30% of the maximum alkali neutralization capacity obtained by the titration test. The mechanism of neutralization by the pH-dependent charge can explain the same neutralization capacities of the soils. Although further investigation on the neutralization capacity of the soils for alkaline substances other than NaOH is required, daily cover soil could serve as a buffer zone for alkaline leachates containing Ca(OH)(2) or other alkaline substances. PMID:20395123

Asakura, Hiroshi; Sakanakura, Hirofumi; Matsuto, Toshihiko

2010-04-14

442

Airport capacity: representation, estimation, optimization  

Microsoft Academic Search

A major goal of air traffic management is to strategically control the flow of traffic so that the demand at an airport meets but does not exceed the operational capacity. This work considers the major aspects of airport operational capacities relevant to the strategic management of air traffic. A representation of airport capacity that properly reflects an airport's operational limits

Eugene P. Gilbo

1993-01-01

443

Pressure Carrying Capacity of Reinforced Plastic Tubes  

Microsoft Academic Search

The effect of the reinforcement of plastic tubes by composite material layers on the internal pressure carrying capacity has been investigated throughout this project. Basic plastic tubes, composite tubes and reinforced plastic tubes, by filament fibers and woven roving glass composite material, with one and two layers under internal pressure have been tested experimentally. Internal pressure has been applied for

Y. A. Khalid; A. F. Hamed; S. M. Sapuan

2007-01-01

444

A Computational Model of Spatial Visualization Capacity  

ERIC Educational Resources Information Center

|Visualizing spatial material is a cornerstone of human problem solving, but human visualization capacity is sharply limited. To investigate the sources of this limit, we developed a new task to measure visualization accuracy for verbally-described spatial paths (similar to street directions), and implemented a computational process model to

Lyon, Don R.; Gunzelmann, Glenn; Gluck, Kevin A.

2008-01-01

445

A Computational Model of Spatial Visualization Capacity  

ERIC Educational Resources Information Center

Visualizing spatial material is a cornerstone of human problem solving, but human visualization capacity is sharply limited. To investigate the sources of this limit, we developed a new task to measure visualization accuracy for verbally-described spatial paths (similar to street directions), and implemented a computational process model to

Lyon, Don R.; Gunzelmann, Glenn; Gluck, Kevin A.

2008-01-01

446

High Capacity Heat Pipe Performance Demonstration.  

National Technical Information Service (NTIS)

A high capacity heat pipe which will operate in one-g and in zero-g is investigated. An artery configuration which is self-priming in one-g was emphasized. Two artery modifications were evolved as candidates to achieve one-g priming and will provide the v...

1983-01-01

447

The Milking Capacity of a Milking Robot  

Microsoft Academic Search

The automatic milking process is represented by means of a model which allows the factors affecting the capacity of an automatic milking system to be studied. The main factors investigated are the times required for cow movements, milking processes and robot motions. With one robot serving two stalls, the idle time of the robot arm was 54%. From an analysis

B. R. Sonck; H. W. J. Donkers

1995-01-01

448

A definition and systems view of anaerobic capacity.  

PubMed

The purpose of this paper is both to define terms used in exercise physiology, i.e. anaerobic capacity, anaerobic work capacity and anaerobic potential, and develop a systems perspective of anaerobic capacity. Philosophical argument is used to support the proposed definitions and systems view, which is an approach to assist in the universal acceptance of such terms amongst scientific investigators, coaches and athletes, and provide a focus on physiological mechanisms associated with anaerobic capacity which may be the subject of future investigation. PMID:7805673

Green, S

1994-01-01

449

[Buffer capacity of polyproton substances].  

PubMed

Mathematical analysis of protolytic properties of a polyelectrolite with arbitrary set of stepwise dissotiation constants is carried out, based on disintegration of summary titration curves and buffer capacity for basic functions. It is demonstrated, that in some cases (for example, investigation of biomembranes and their components) simplified disintegration variants can be used. Buffer titration curve of biopolymers and biomembranes is a "buffer spectrum", the position of bands on the pH scale, their intensity and half-width being determined by the nature of the object (the quantity and quality of hydrophilic groups and the set of its conformation states). Sharp peaks of the buffer spectrum correspond to the conformation transition of the object, and their half-width on the pH scale determines the cooperative degree of each conformation transition. The mathematical analysis described is not specific to the formation of polyprotonic complex, and it can be used in investigation of the complex formation with any monodentant ligand. It is concluded that the method described can be used in the investigation of complex biomembranes and different processes, in which these membranes participate. PMID:32925

Opanasenko, V K; Gerts, S M; Makarov, A D

1978-08-01

450

Enhanced Preliminary Assessment.  

National Technical Information Service (NTIS)

An Enhanced Preliminary Assessment was conducted at Fort Benjamin Harrison (FBH) Indiana, which is located approximately 12 miles from downtown Indianapolis in Lawrence Township, Marion County. FBH contains 2,501 acres, of which approximately 1,069 acres ...

1992-01-01

451

Serum antioxidant capacity in neurological, psychiatric, renal diseases and cardiomyopathy  

Microsoft Academic Search

Summary. The role of free radicals (FR) in the pathogenesis and in the progression of many diseases has been often discussed, but\\u000a not widely investigated. However, the total antioxidant capacity in the serum seems to be of great evidence. Total antioxidant\\u000a capacity was determined using oxygen absorbance capacity assay (ORAC) in serum of patients suffering from depression, schizophrenia,\\u000a Alzheimer's disease

E. Sofic; A. Rustembegovic; G. Kroyer; G. Cao

2002-01-01

452

First mideast capacity planned  

SciTech Connect

Kuwait catalyst Co.`s (KCC) plans to build a hydrodesulfurization (HDS) catalysts plant in Kuwait will mark the startup of the first refining catalysts production in the Persian Gulf region. KCC, owned by a conglomerate of Kuwait companies and governmental agencies, has licensed catalyst manufacturing technology from Japan Energy in a deal estimated at more than 7 billion ($62 million). Plant design will be based on technology from Orient Catalyst, Japan Energy`s catalysts division. Construction is expected to begin in January 1997 for production startup by January 1998. A sou