Intracellular pressure is a motive force for cell motion in Amoeba proteus.

PubMed

Yanai, M; Kenyon, C M; Butler, J P; Macklem, P T; Kelly, S M

1996-01-01

The cortical filament layer of free-living amoebae contains concentrated actomyosin, suggesting that it can contract and produce an internal hydrostatic pressure. We report here on direct and dynamic intracellular pressure (P(ic)) measurements in Amoeba proteus made using the servo-null technique. In resting apolar A. proteus, P(ic) increased while the cells remained immobile and at apparently constant volume. P(ic) then decreased approximately coincident with pseudopod formation. There was a positive correlation between P(ic) at the onset of movement and the rate of pseudopod formation. These results are the first direct evidence that hydrostatic pressure may be a motive force for cell motion. We postulate that contractile elements in the amoeba's cortical layer contract and increase P(ic) and that this P(ic) is utilized to overcome the viscous flow resistance of the intracellular contents during pseudopod formation.

Extrinsic Motivation as Correlates of Work Attitude of the Nigerian Police Force: Implications for Counselling

ERIC Educational Resources Information Center

Igun, Sylvester Nosakhare

2008-01-01

The study examined Extrinsic motivation as correlates of work attitude of the Nigeria Police Force and its implications for counselling. 300 Police personnel were selected by random sampling technique from six departments that make up police force Headquarters, Abuja. The personnel were selected from each department using simple sampling…

M-type thioredoxins are involved in the xanthophyll cycle and proton motive force to alter NPQ under low-light conditions in Arabidopsis.

PubMed

Da, Qingen; Sun, Ting; Wang, Menglong; Jin, Honglei; Li, Mengshu; Feng, Dongru; Wang, Jinfa; Wang, Hong-Bin; Liu, Bing

2018-02-01

M-type thioredoxins are required to regulate zeaxanthin epoxidase activity and to maintain the steady-state level of the proton motive force, thereby influencing NPQ properties under low-light conditions in Arabidopsis. Non-photochemical quenching (NPQ) helps protect photosynthetic organisms from photooxidative damage via the non-radiative dissipation of energy as heat. Energy-dependent quenching (qE) is a major constituent of NPQ. However, the mechanism underlying the regulation of qE is not well understood. In this study, we demonstrate that the m-type thioredoxins TRX-m1, TRX-m2, and TRX-m4 (TRX-ms) interact with the xanthophyll cycle enzyme zeaxanthin epoxidase (ZE) and are required for maintaining the redox-dependent stabilization of ZE by regulating its intermolecular disulfide bridges. Reduced ZE activity and accumulated zeaxanthin levels were observed under TRX-ms deficiency. Furthermore, concurrent deficiency of TRX-ms resulted in a significant increase in proton motive force (pmf) and acidification of the thylakoid lumen under low irradiance, perhaps due to the significantly reduced ATP synthase activity under TRX-ms deficiency. The increased pmf, combined with acidification of the thylakoid lumen and the accumulation of zeaxanthin, ultimately contribute to the elevated stable qE in VIGS-TRX-m2m4/m1 plants under low-light conditions. Taken together, these results indicate that TRX-ms are involved in regulating NPQ-dependent photoprotection in Arabidopsis.

What motivates Australian health service users with chronic illness to engage in self-management behaviour?

PubMed

Jowsey, Tanisha; Pearce-Brown, Carmen; Douglas, Kirsty A; Yen, Laurann

2014-04-01

Health policy in Australia emphasizes the role of health service users (HSU) in managing their own care but does not include mechanisms to assist HSUs to do so. To describe motivation towards or away from self-management in a diverse group of older Australians with diabetes, chronic heart failure (CHF) or chronic obstructive pulmonary disease (COPD) and suggest policy interventions to increase patient motivation to manage effectively. Content and thematic analyses of in-depth semi-structured interviews. Participants were asked to describe their experience of having chronic illness, including experiences with health professionals and health services. Secondary analysis was undertaken to expose descriptions of self-management behaviours and their corresponding motivational factors. Health service users with diabetes, COPD and/or CHF (N=52). Participant descriptions exposed internal and external sources of motivation. Internal motivation was most often framed positively in terms of the desire to optimize health, independence and wellness and negatively in terms of avoiding the loss of those attributes. External motivation commonly arose from interactions with family, carers and health professionals. Different motivators appeared to work simultaneously and interactively in individuals, and some motivators seemed to be both positive and negative drivers. Successful management of chronic illness requires recognition that the driving forces behind motivation are interconnected. In particular, the significance of family as an external source of motivation suggests a need for increased investment in the knowledge and skill building of family members who contribute to care. © 2011 John Wiley & Sons Ltd.

Stimulus conflict triggers behavioral avoidance.

PubMed

Dignath, David; Eder, Andreas B

2015-12-01

According to a recent extension of the conflict-monitoring theory, conflict between two competing response tendencies is registered as an aversive event and triggers a motivation to avoid the source of conflict. In the present study, we tested this assumption. Over five experiments, we examined whether conflict is associated with an avoidance motivation and whether stimulus conflict or response conflict triggers an avoidance tendency. Participants first performed a color Stroop task. In a subsequent motivation test, participants responded to Stroop stimuli with approach- and avoidance-related lever movements. These results showed that Stroop-conflict stimuli increased the frequency of avoidance responses in a free-choice motivation test, and also increased the speed of avoidance relative to approach responses in a forced-choice test. High and low proportions of response conflict in the Stroop task had no effect on avoidance in the motivation test. Avoidance of conflict was, however, obtained even with new conflict stimuli that had not been presented before in a Stroop task, and when the Stroop task was replaced with an unrelated filler task. Taken together, these results suggest that stimulus conflict is sufficient to trigger avoidance.

Mature-Aged Workers' Learning Needs and Motivations for Participation in Training Programs

ERIC Educational Resources Information Center

Meyers, Rebecca; Billett, Stephen; Kelly, Ann

2010-01-01

Issues arising from an ageing society, a low fertility rate and growing need for a skilled work force have seen increased government commitment to improving the participation rate of mature-aged workers. Education and training are seen as a principal strategy to increase the employability of these workers, yet participation in training is low and…

Limitations to photosynthesis by proton motive force-induced photosystem II photodamage

PubMed Central

Davis, Geoffry A; Kanazawa, Atsuko; Schöttler, Mark Aurel; Kohzuma, Kaori; Froehlich, John E; Rutherford, A William; Satoh-Cruz, Mio; Minhas, Deepika; Tietz, Stefanie; Dhingra, Amit; Kramer, David M

2016-01-01

The thylakoid proton motive force (pmf) generated during photosynthesis is the essential driving force for ATP production; it is also a central regulator of light capture and electron transfer. We investigated the effects of elevated pmf on photosynthesis in a library of Arabidopsis thaliana mutants with altered rates of thylakoid lumen proton efflux, leading to a range of steady-state pmf extents. We observed the expected pmf-dependent alterations in photosynthetic regulation, but also strong effects on the rate of photosystem II (PSII) photodamage. Detailed analyses indicate this effect is related to an elevated electric field (Δψ) component of the pmf, rather than lumen acidification, which in vivo increased PSII charge recombination rates, producing singlet oxygen and subsequent photodamage. The effects are seen even in wild type plants, especially under fluctuating illumination, suggesting that Δψ-induced photodamage represents a previously unrecognized limiting factor for plant productivity under dynamic environmental conditions seen in the field. DOI: http://dx.doi.org/10.7554/eLife.16921.001 PMID:27697149

Limitations to photosynthesis by proton motive force-induced photosystem II photodamage

DOE PAGES

Davis, Geoffry A.; Kanazawa, Atsuko; Schöttler, Mark Aurel; ...

2016-10-04

The thylakoid proton motive force (pmf) generated during photosynthesis is the essential driving force for ATP production; it is also a central regulator of light capture and electron transfer. We investigated the effects of elevated pmf on photosynthesis in a library of Arabidopsis thaliana mutants with altered rates of thylakoid lumen proton efflux, leading to a range of steady-state pmf extents. We observed the expected pmf-dependent alterations in photosynthetic regulation, but also strong effects on the rate of photosystem II (PSII) photodamage. Detailed analyses indicate this effect is related to an elevated electric field (Δψ) component of the pmf, rathermore » than lumen acidification, which in vivo increased PSII charge recombination rates, producing singlet oxygen and subsequent photodamage. The effects are seen even in wild type plants, especially under fluctuating illumination, suggesting that Δψ-induced photodamage represents a previously unrecognized limiting factor for plant productivity under dynamic environmental conditions seen in the field.« less

Factors Influencing Learner Conceptions of Force: Exploring the Interaction among Visuospatial Ability, Motivation, and Conceptions of Newtonian Mechanics in University Undergraduates from an Evolutionary Perspective

ERIC Educational Resources Information Center

Vallett, David Bruce

2013-01-01

This study examined the relationships among visuospatial ability, motivation to learn science, and learner conceptions of force across commonly measured demographics with university undergraduates with the aim of examining the support for an evolved sense of force and motion. Demographic variables of interest included age, ethnicity, and gender,…

Motivation in Education.

ERIC Educational Resources Information Center

Ray, Nancy L.

This paper presents basic principles and theories of motivation, attempts to provide a better understanding of the concept, and explores the role motivation plays in learning. Basic theories of motivation are reviewed including: Freud's belief in motivation by the id, unconscious forces, and sexual stages; Jung and Adler's belief that people are…

In Silico Analysis of the Regulation of the Photosynthetic Electron Transport Chain in C3 Plants1[OPEN

PubMed Central

Kramer, David M.

2018-01-01

We present a new simulation model of the reactions in the photosynthetic electron transport chain of C3 species. We show that including recent insights about the regulation of the thylakoid proton motive force, ATP/NADPH balancing mechanisms (cyclic and noncyclic alternative electron transport), and regulation of Rubisco activity leads to emergent behaviors that may affect the operation and regulation of photosynthesis under different dynamic environmental conditions. The model was parameterized with experimental results in the literature, with a focus on Arabidopsis (Arabidopsis thaliana). A dataset was constructed from multiple sources, including measurements of steady-state and dynamic gas exchange, chlorophyll fluorescence, and absorbance spectroscopy under different light intensities and CO2, to test predictions of the model under different experimental conditions. Simulations suggested that there are strong interactions between cyclic and noncyclic alternative electron transport and that an excess capacity for alternative electron transport is required to ensure adequate redox state and lumen pH. Furthermore, the model predicted that, under specific conditions, reduction of ferredoxin by plastoquinol is possible after a rapid increase in light intensity. Further analysis also revealed that the relationship between ATP synthesis and proton motive force was highly regulated by the concentrations of ATP, ADP, and inorganic phosphate, and this facilitated an increase in nonphotochemical quenching and proton motive force under conditions where metabolism was limiting, such as low CO2, high light intensity, or combined high CO2 and high light intensity. The model may be used as an in silico platform for future research on the regulation of photosynthetic electron transport. PMID:28924017

Motivation and Resolve of U.S. Air Force Pilot Candidates

DTIC Science & Technology

2017-06-15

6 4.1.1 Motivation Survey (ACS Survey I...6 4.1.2 Resolve Survey (ACS Survey II) .............................................................................. 7 4.2...8 5.1 Motivation Survey (Intrinsic

A Qualitative Investigation of Prospective Teachers' Hopes, Their Sources, and Motivational Forces

ERIC Educational Resources Information Center

Eren, Altay; Yesilbursa, Amanda

2017-01-01

This grounded theory study examined prospective teachers' (PTs) dispositional hopes, teaching-specific hopes, their sources, and motivational force of teaching-specific hopes. A total of 41 PTs enrolled on different teacher education programmes voluntarily participated in the semi-structured interviews. Findings showed that PTs' dispositional…

Exogenous energy supply to the plasma membrane of dark anaerobic cyanobacterium Anacystis nidulans: thermodynamic and kinetic characterization of the ATP synthesis effected by an artificial proton motive force.

PubMed

Peschek, G A; Hinterstoisser, B; Riedler, M; Muchl, R; Nitschmann, W H

1986-05-15

The net synthesis of ATP in dark anaerobic cells of Anacystis nidulans subjected to acid jumps and/or valinomycin pulses was characterized thermodynamically and kinetically. Maximum initial rates of 75 nmol ATP/min per mg dry weight at an applied proton motive force of -350 mV were obtained, the flow-force relationship (rate of ATP synthesis vs applied proton motive force) being linear between -240 and -320 mV irrespective of the source of the proton motive force. The pulse-induced ATP synthesis was inhibited by uncouplers (H+ ionophores) and F0F1-ATPase inhibitors but not by KCN or CO. In order to obtain maximum rates of pulse-induced ATP synthesis both a favorable stationary delta psi (-100 mV at pHo 9, preceding the acid jumps) and a favorable stationary delta pH (+2 units at pHo 4.1, preceding the valinomycin pulse) of the plasma membrane were obligatory, the effects of delta psi and delta pH being strictly additive. Moreover, the pulse-induced ATP synthesis required a minimum total proton motive force of -200 to -250 mV across the plasma membrane; it also required low preexisting phosphorylation potentials corresponding to -400 mV in dark anaerobic, i.e., energy-depleted, cells. The results are discussed in terms of both a reversible H+-ATPase and a respiratory electron transport system occurring in the plasma membrane of intact Anacystis nidulans.

The Measurement of Motivation with Science Students

ERIC Educational Resources Information Center

Mubeen, Sarwat; Reid, Norman

2014-01-01

Motivation is an inner force that activates and provides direction to our thought, feelings and actions. Two main characteristics of motivation are goal directed behavior and persistence. Motivated people persistently work for the goal until it is achieved. This paper explores the nature of motivation in the context of learning and seeks to relate…

Lost Opportunity: The High Quality, Reduced Military Force of the 1990’s: Is there a Role for the Nation’s Disadvantaged Youth?

DTIC Science & Technology

1990-12-01

others based on detailed, quantitative "manpower engineering " techniques (White and Hosek, in Scowcroft, 1982, p. 51). 3. The Military Force and...complex technology does not involve a corresponding increase in more highly trained personnel. Trends in industry suggest that job titles are often...theories of motivation, two of which are relevant to this analysis and will be briefly described below. Expectancy theory, with roots in industrial

Leadership and the Force of Love: Six Keys to Motivating with Love.

ERIC Educational Resources Information Center

Hoyle, John R.

Although educators are frequently faced with the challenges of politics, hostility, selfishness, and violence, this book demonstrates that these obstacles can be overcome through vision, teamwork, motivation, empowerment, and communication. By using love as a guiding force in the daily interactions with others, the way one conducts business is…

Motivations for the introduction of new environmental technology

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

Palmer, J.R.

1994-09-01

While I am not a social scientist or psychologist, it is my personal observation that there are three principal motives which cause companies (and also individuals) to contribute to the common good of society. These three motives are love, fear, and greed. Of course companies and people are motivated toward positive action by many other factors such as survival, hunger, and motivated by other negative factors such as hate and revenge, but with respect to taking actions which benefit persons other than themselves, I contend that the principal factors which motivate such behavior are the three cited. Before proceeding further,more » let me point out that while the term {open_quotes}greed{close_quotes} has a lot of negative connotations associated with it, it can be a strong driving force for the common good. Our treasured capitalistic economic system is based upon it. Of course greed can also be a strong driving force for social destruction. Monopolies and dictatorships are also based upon greed. The trick therefore is to extract the potential social benefits from greed without causing it to turn upon the society and devour it. While I could use a more euphemistic term than greed, such as {open_quotes}profit motive{close_quotes}, to describe this motivating factor, I have chosen to stick with the term {open_quotes}greed{close_quotes} because it cuts to the level of basic human instincts, and it adds some spice to an otherwise dull subject. Let me also assure you that I am not using the term in a cynical manner. I believe that it can be a very positive force (in fact, I contend, the most effective force) in promoting the introduction of new environmental technology. But, before getting into that, let us first examine the role of the other two motives for maximizing the common environmental good: love and fear.« less

Finding the Forgotten: Motivating Military Veterans to Register with a Primary Healthcare Practice.

PubMed

Finnegan, Alan; Jackson, Robin; Simpson, Robin

2018-05-09

In the UK, primary healthcare practices choose from a series of Read codes to detail certain characteristics onto a patient's medical documentation. One of these codes is for military veterans indicating a history relating to military service. However, veterans are poor at seeking help, with research indicating that this code is only applied in 7.9% of cases. Clinical staff have a clear role in motivating veterans to declare their ex-Forces status or register with a primary healthcare center. The aim of this study was to motivate veterans to notify primary healthcare staff of their armed forces status or register with a general practitioner, and to improve primary healthcare staff's understanding of veterans' health and social care issues. Data were provided by four primary healthcare centers' containing 40,470 patients in Lancashire, England during 2017. Pre- and post-patient medical record Read Code searches were conducted either side of a 6-wk intervention period centered on an advertising campaign. The data identified those veterans with the military specific Read code attached to their medical record and their age, gender, marital status and mental health disorders. Further information was gathered from interviews with eight members of staff, some of whom had completed an e-learning veteran healthcare academic module. The study was approved by the University of Chester's Research Ethics Committee. The pre-intervention search indicated that 8.7% (N = 180) of veterans were registered and had the correct military specific code applied to their medical record. Post-intervention, this figure increased by nearly 200% to N = 537. Mental health disorders were present in 28% (N = 152) of cases, including 15% (N = 78) with depression. Interviews revealed the primary healthcare staff's interpretation of the factors that motivated patients to declare their ex-Forces status and the key areas for development. The primary healthcare staff took ownership and responsibility for this initiative. They were creative in introducing new ways of engaging with the local armed forces community. Many veterans' and staff were unaware of veterans' entitlement to priority medical services, or the wider provisions available to them. It is probable that veterans declaring their military status within primary healthcare, or registering with a general practitioner for the first time is likely to increase. Another review will be undertaken after 12 mo, which will provide a better indication of success. There remains however an ongoing need to reach out to those veterans who never access a primary healthcare practice. This paper adds to the limited international empirical evidence undertaken to explore help-seeking behavior in an armed forces community. The positive outcomes of increased awareness and staff commitment provide a template for improvement across the UK, and will potentially stimulate similar initiatives with international colleagues.

Clustering Teachers' Motivations for Teaching

ERIC Educational Resources Information Center

Visser-Wijnveen, Gerda J.; Stes, Ann; Van Petegem, Peter

2014-01-01

The motivation to teach is a powerful, yet neglected, force in teaching at institutes of higher education. A better understanding of academics' motivations for teaching is necessary. The aim of this mixed-method study was to identify groups with distinctively different motivations for teaching. Six clusters were identified: expertise, duty,…

Analysis of adjusting effects of mounting force on frequency conversion of mounted nonlinear optics.

PubMed

Su, Ruifeng; Liu, Haitao; Liang, Yingchun; Lu, Lihua

2014-01-10

Motivated by the need to increase the second harmonic generation (SHG) efficiency of nonlinear optics with large apertures, a novel mounting configuration with active adjusting function on the SHG efficiency is proposed and mechanically and optically studied. The adjusting effects of the mounting force on the distortion and stress are analyzed by the finite element methods (FEM), as well as the contribution of the distortion and stress to the change in phase mismatch, and the SHG efficiency are theoretically stated. Further on, the SHG efficiency is calculated as a function of the mounting force. The changing trends of the distortion, stress, and the SHG efficiency with the varying mounting force are obtained, and the optimal ones are figured out. Moreover, the mechanism of the occurrence of the optimal values is studied and the adjusting strategy is put forward. Numerical results show the robust adjustment of the mounting force, as well as the effectiveness of the mounting configuration, in increasing the SHG efficiency.

In Silico Analysis of the Regulation of the Photosynthetic Electron Transport Chain in C3 Plants.

PubMed

Morales, Alejandro; Yin, Xinyou; Harbinson, Jeremy; Driever, Steven M; Molenaar, Jaap; Kramer, David M; Struik, Paul C

2018-02-01

We present a new simulation model of the reactions in the photosynthetic electron transport chain of C3 species. We show that including recent insights about the regulation of the thylakoid proton motive force, ATP/NADPH balancing mechanisms (cyclic and noncyclic alternative electron transport), and regulation of Rubisco activity leads to emergent behaviors that may affect the operation and regulation of photosynthesis under different dynamic environmental conditions. The model was parameterized with experimental results in the literature, with a focus on Arabidopsis ( Arabidopsis thaliana ). A dataset was constructed from multiple sources, including measurements of steady-state and dynamic gas exchange, chlorophyll fluorescence, and absorbance spectroscopy under different light intensities and CO 2 , to test predictions of the model under different experimental conditions. Simulations suggested that there are strong interactions between cyclic and noncyclic alternative electron transport and that an excess capacity for alternative electron transport is required to ensure adequate redox state and lumen pH. Furthermore, the model predicted that, under specific conditions, reduction of ferredoxin by plastoquinol is possible after a rapid increase in light intensity. Further analysis also revealed that the relationship between ATP synthesis and proton motive force was highly regulated by the concentrations of ATP, ADP, and inorganic phosphate, and this facilitated an increase in nonphotochemical quenching and proton motive force under conditions where metabolism was limiting, such as low CO 2 , high light intensity, or combined high CO 2 and high light intensity. The model may be used as an in silico platform for future research on the regulation of photosynthetic electron transport. © 2018 American Society of Plant Biologists. All Rights Reserved.

Motivational Forces in a Growth-Centered Model of Teacher Evaluation

ERIC Educational Resources Information Center

Bruski, Nicholas Aron

2012-01-01

This paper presents the results of a study that explored the effects of using an action research process to examine and develop a system of teacher evaluation that leads to real changes in teacher behaviors. The study explored motivational forces and psychological processes related to the change process in adult behaviors. Data were collected by…

Exploring Community College Faculty Job Satisfaction: Application of the Satisfaction-Performance Motivation Model

ERIC Educational Resources Information Center

Lyons, Frankie Woodard

2012-01-01

Community colleges are becoming increasingly important organizations within the modern structure of higher education. Nearly half of all U.S. college students are enrolled in community colleges. Forces driving the expanding reliance upon community colleges to provide the postsecondary educational needs of U.S. citizens include: the current…

Creativity and the Transformation of Higher Education: The Need for a Black Mountain College Approach

ERIC Educational Resources Information Center

Emanuel, Richard C.; Challons-Lipton, Siu

2013-01-01

The need for increased creativity in education is currently being proposed in much innovative thinking on higher education as universities are forced to recreate themselves. There are four conditions facing higher education worldwide: alignment, motivation, connection, and direction. Higher education is characterized by a hierarchy of subjects and…

Advancing Engaged Scholarship in Promotion and Tenure: A Roadmap and Call for Reform

ERIC Educational Resources Information Center

O'Meara, KerryAnn; Eatman, Timothy; Petersen, Saul

2015-01-01

Despite the precipitous increase in nontenure-track faculty appointments, the promotion and tenure process continues to operate as a central "motivational and cultural force in the academic lives" of many faculty members. As a part of larger reward systems, the promotion and tenure process reflects institutional values, aspirations,…

Excellence in Television for Young Children--Entertainment, Engagement and Empowerment

ERIC Educational Resources Information Center

Harrison, Cathie

2004-01-01

The notion of excellence in early childhood education is increasingly recognised as both subjective and problematic. The search for excellence can be, however, a motivating force for those committed to providing experiences that enrich and enhance the lives of young children within diverse Australian communities. This commitment is shared by the…

Negative emotions facilitate isometric force through activation of prefrontal cortex and periaqueductal gray.

PubMed

Blakemore, Rebekah L; Rieger, Sebastian W; Vuilleumier, Patrik

2016-01-01

Emotions are considered to modulate action readiness. Previous studies have demonstrated increased force production following exposure to emotionally arousing visual stimuli; however the neural mechanisms underlying how precise force output is controlled within varying emotional contexts remain poorly understood. To identify the neural correlates of emotion-modulated motor behaviour, twenty-two participants produced a submaximal isometric precision-grip contraction while viewing pleasant, unpleasant, neutral or blank images (without visual feedback of force output). Force magnitude was continuously recorded together with change in brain activity using functional magnetic resonance imaging. Viewing unpleasant images resulted in reduced force decay during force maintenance as compared with pleasant, neutral and blank images. Subjective valence and arousal ratings significantly predicted force production during maintenance. Neuroimaging revealed that negative valence and its interaction with force output correlated with increased activity in right inferior frontal gyrus (rIFG), while arousal was associated with amygdala and periaqueductal gray (PAG) activation. Force maintenance alone was correlated with cerebellar activity. These data demonstrate a valence-driven modulation of force output, mediated by a cortico-subcortical network involving rIFG and PAG. These findings are consistent with engagement of motor pathways associated with aversive motivation, eliciting defensive behaviour and action preparedness in response to negative emotional signals. Copyright © 2015 Elsevier Inc. All rights reserved.

Change and Innovation in the Funeral Industry.

PubMed

Beard, Virginia R; Burger, William C

2017-05-01

The "modern" or traditional funeral, as it is known in the funeral industry today, that includes embalming, casket, service, and burial in a cemetery, emerged as a result of four forces in American society: the Industrial Revolution, the Civil War, the emergence of a genteel code of conduct as a result of increased wealth in our society, and changing cultural views toward death. While the traditional funeral ritual remains the most popular funeral selection in the United States today, the industry is experiencing changes that are reshaping the death rituals and methods of body disposal. A meta-analysis of relevant news articles from 1987 through 2014 finds that these changes are occurring as a result of two general motivational themes: a Business-Related Motivation and a Consumer-Related Motivation, each with corresponding subthemes.

Enslaving in a serial chain: interactions between grip force and hand force in isometric tasks.

PubMed

Paclet, Florent; Ambike, Satyajit; Zatsiorsky, Vladimir M; Latash, Mark L

2014-03-01

This study was motivated by the double action of extrinsic hand muscles that produce grip force and also contribute to wrist torque. We explored interactions between grip force and wrist torque in isometric force production tasks. In particular, we tested a hypothesis that an intentional change in one of the two kinetic variables would produce an unintentional change in the other (enslaving). When young healthy subjects produced accurate changes in the grip force, only minor effects on the force produced by the hand (by wrist flexion/extension action) were observed. In contrast, a change in the hand force produced consistent changes in grip force in the same direction. The magnitude of such unintentional grip force change was stronger for intentional hand force decrease as compared to hand force increase. These effects increased with the magnitude of the initial grip force. When the subjects were asked to produce accurate total force computed as the sum of the hand and grip forces, strong negative covariation between the two forces was seen across trials interpreted as a synergy stabilizing the total force. An index of this synergy was higher in the space of "modes," hypothetical signals to the two effectors that could be changed by the controller one at a time. We interpret the complex enslaving effects (positive force covariation) as conditioned by typical everyday tasks. The presence of synergic effects (negative, task-specific force covariation) can be naturally interpreted within the referent configuration hypothesis.

Enslaving in a serial chain: Interactions between grip force and hand force in isometric tasks

PubMed Central

Paclet, Florent; Ambike, Satyajit; Zatsiorsky, Vladimir M.; Latash, Mark L.

2014-01-01

This study was motivated by the double action of extrinsic hand muscles that produce grip force and also contribute to wrist torque. We explored interactions between grip force and wrist torque in isometric force production tasks. In particular, we tested a hypothesis that an intentional change in one of the two kinetic variables would produce an unintentional change in the other (enslaving). When young healthy subjects produced accurate changes in the grip force, only minor effects on the force produced by the hand (by wrist flexion/extension action) were observed. In contrast, a change in the hand force produced consistent changes in grip force in the same direction. The magnitude of such unintentional grip force change was stronger for intentional hand force decrease as compared to hand force increase. These effects increased with the magnitude of the initial grip force. When the subjects were asked to produce accurate total force computed as the sum of the hand and grip forces, strong negative co-variation between the two forces was seen across trials interpreted as a synergy stabilizing the total force. An index of this synergy was higher in the space of “modes”, hypothetical signals to the two effectors that could be changed by the controller one at a time. We interpret the complex enslaving effects (positive force co-variation) as conditioned by typical everyday tasks. The presence of synergic effects (negative, task-specific force co-variation) can be naturally interpreted within the referent configuration hypothesis. PMID:24309747

Creativity as Mediator for Intrinsic Motivation and Sales Performance

ERIC Educational Resources Information Center

Bodla, Mahmood A.; Naeem, Basharat

2014-01-01

Substantial theoretical and empirical literature indicates inconsistent performance implications of intrinsic motivation, suggesting the possibility of some explanatory mechanisms. However, little is known about the factors that might explain intrinsic motivation and sales force performance relation, particularly in highly competitive and…

Professional Motivation Formation of Future Specialists under the Conditions of Regional Educational Complex

ERIC Educational Resources Information Center

Kargina, Elena Mikhaylovna

2015-01-01

Motivation plays the leading role in the organization of the personality structure. It is a driving force of the activity. Motivation accounts for the behavior and activity and has a great impact on professional self-determination and person's satisfaction with the work. The problem of professional motivation formation of a future specialist is…

Stimulating Central Carbon Metabolism to Re-sensitize Pseudomonas aeruginosa to Aminoglycosides.

PubMed

Martins, Dorival; Nguyen, Dao

2017-02-16

In this issue of Cell Chemical Biology, Meylan et al. (2017) examine how stimulation of central carbon metabolism of Pseudomonas aeruginosa modulates aminoglycoside lethality in tolerant bacteria. They identify fumarate as a tobramycin potentiator that stimulates proton motive force-dependent drug uptake and increases respiration-dependent killing. Copyright © 2017. Published by Elsevier Ltd.

Harmonic Fluxes and Electromagnetic Forces of Concentric Winding Brushless Permanent Magnet Motor

NASA Astrophysics Data System (ADS)

Ishibashi, Fuminori; Takemasa, Ryo; Matsushita, Makoto; Nishizawa, Takashi; Noda, Shinichi

Brushless permanent magnet motors have been widely used in home applications and industrial fields. These days, high efficiency and low noise motors are demanded from the view point of environment. Electromagnetic noise and iron loss of the motor are produced by the harmonic fluxes and electromagnetic forces. However, order and space pattern of these have not been discussed in detail. In this paper, fluxes, electromagnetic forces and magneto-motive forces of brushless permanent magnet motors with concentric winding were analyzed analytically, experimentally and numerically. Time harmonic fluxes and time electromagnetic forces in the air gap were measured by search coils on the inner surface of the stator teeth and analyzed by FEM. Space pattern of time harmonic fluxes and time electromagnetic forces were worked out with experiments and FEM. Magneto motive forces due to concentric winding were analyzed with equations and checked by FEM.

Taking the Test Taker's Perspective: Response Process and Test Motivation in Multidimensional Forced-Choice Versus Rating Scale Instruments.

PubMed

Sass, Rachelle; Frick, Susanne; Reips, Ulf-Dietrich; Wetzel, Eunike

2018-03-01

The multidimensional forced-choice (MFC) format has been proposed as an alternative to the rating scale (RS) response format. However, it is unclear how changing the response format may affect the response process and test motivation of participants. In Study 1, we investigated the MFC response process using the think-aloud technique. In Study 2, we compared test motivation between the RS format and different versions of the MFC format (presenting 2, 3, 4, and 5 items simultaneously). The response process to MFC item blocks was similar to the RS response process but involved an additional step of weighing the items within a block against each other. The RS and MFC response format groups did not differ in their test motivation. Thus, from the test taker's perspective, the MFC format is somewhat more demanding to respond to, but this does not appear to decrease test motivation.

Coupling between Current and Dynamic Magnetization : from Domain Walls to Spin Waves

NASA Astrophysics Data System (ADS)

Lucassen, M. E.

2012-05-01

So far, we have derived some general expressions for domain-wall motion and the spin motive force. We have seen that the β parameter plays a large role in both subjects. In all chapters of this thesis, there is an emphasis on the determination of this parameter. We also know how to incorporate thermal fluctuations for rigid domain walls, as shown above. In Chapter 2, we study a different kind of fluctuations: shot noise. This noise is caused by the fact that an electric current consists of electrons, and therefore has fluctuations. In the process, we also compute transmission and reflection coefficients for a rigid domain wall, and from them the linear momentum transfer. More work on fluctuations is done in Chapter 3. Here, we consider a (extrinsically pinned) rigid domain wall under the influence of thermal fluctuations that induces a current via spin motive force. We compute how the resulting noise in the current is related to the β parameter. In Chapter 4 we look into in more detail into the spin motive forces from field driven domain walls. Using micro magnetic simulations, we compute the spin motive force due to vortex domain walls explicitly. As mentioned before, this gives qualitatively different results than for a rigid domain wall. The final subject in Chapter 5 is the application of the general expression for spin motive forces to magnons. Although this might seem to be unrelated to domain-wall motion, this calculation allows us to relate the β parameter to macroscopic transport coefficients. This work was supported by Stichting voor Fundamenteel Onderzoek der Materie (FOM), the Netherlands Organization for Scientific Research (NWO), and by the European Research Council (ERC) under the Seventh Framework Program (FP7).

On the application of motivation theory to human factors/ergonomics: motivational design principles for human-technology interaction.

PubMed

Szalma, James L

2014-12-01

Motivation is a driving force in human-technology interaction. This paper represents an effort to (a) describe a theoretical model of motivation in human technology interaction, (b) provide design principles and guidelines based on this theory, and (c) describe a sequence of steps for the. evaluation of motivational factors in human-technology interaction. Motivation theory has been relatively neglected in human factors/ergonomics (HF/E). In both research and practice, the (implicit) assumption has been that the operator is already motivated or that motivation is an organizational concern and beyond the purview of HF/E. However, technology can induce task-related boredom (e.g., automation) that can be stressful and also increase system vulnerability to performance failures. A theoretical model of motivation in human-technology interaction is proposed, based on extension of the self-determination theory of motivation to HF/E. This model provides the basis for both future research and for development of practical recommendations for design. General principles and guidelines for motivational design are described as well as a sequence of steps for the design process. Human motivation is an important concern for HF/E research and practice. Procedures in the design of both simple and complex technologies can, and should, include the evaluation of motivational characteristics of the task, interface, or system. In addition, researchers should investigate these factors in specific human-technology domains. The theory, principles, and guidelines described here can be incorporated into existing techniques for task analysis and for interface and system design.

Effects of social identity salience on motivational orientation and conflict strategies in intergenerational conflict.

PubMed

Ho, Henry C Y; Yeung, Dannii Y

2017-06-01

With the upsurge of older adults still working, the labour force is becoming increasingly diverse in age. Age diversity in an organisation can increase the likelihood of intergenerational conflict. The present study aims to integrate the dual concern model and social identity theory to explain the underlying mechanisms of intergenerational conflict by examining the effects of social identity salience on motivational orientation and conflict strategies. A 2 (subgroup identity salience: low vs. high younger/older group membership) × 2 (superordinate identity salience: low vs. high organisational group membership) factorial design with a structured questionnaire on motivational orientation and conflict strategies in relation to a hypothetical work conflict scenario was implemented among 220 postgraduate university students in Hong Kong. Results revealed that subgroup and superordinate identities had a combined influence on conflict strategies but not in motivational orientation. Subgroup and superordinate identification promoted integrating and compromising strategies, superordinate identification promoted obliging strategy, subgroup identification promoted dominating strategy and no identification promoted avoiding strategy. Age did not moderate these relationships. This study contributes to the development of the integrated model of conflict. © 2017 International Union of Psychological Science.

Andragogy and medical education: are medical students internally motivated to learn?

PubMed

Misch, Donald A

2002-01-01

Andragogy - the study of adult education - has been endorsed by many medical educators throughout North America. There remains, however, considerable controversy as to the validity and utility of adult education principles as espoused by the field's founder, Malcolm Knowles. Whatever the utility of andragogic doctrine in general education settings, there is reason to doubt its wholesale applicability to the training of medical professionals. Malcolm Knowles' last tenet of andragogy holds that adult learners are more motivated by internal than by external factors. The validity of this hypothesis in medical education is examined, and it is demonstrated that medical students' internal and external motivation are context-dependent, not easily distinguishable, and interrelate with one another in complex ways. Furthermore, the psychological motivation for medical student learning is determined by a variety of factors that range from internal to external, unconscious to conscious, and individual to societal. The andragogic hypothesis of increased internal motivation to learn on the part of adults in general, and medical trainees in particular, is rejected as simplistic, misleading, and counterproductive to developing a greater understanding of the forces that drive medical students to learn.

The women in science and engineering scholars program

NASA Technical Reports Server (NTRS)

Falconer, Etta Z.; Guy, Lori Ann

1989-01-01

The Women in Science and Engineering Scholars Program provides scientifically talented women students, including those from groups underrepresented in the scientific and technical work force, with the opportunity to pursue undergraduate studies in science and engineering in the highly motivating and supportive environment of Spelman College. It also exposes students to research training at NASA Centers during the summer. The program provides an opportunity for students to increase their knowledge of career opportunities at NASA and to strengthen their motivation through exposure to NASA women scientists and engineers as role models. An extensive counseling and academic support component to maximize academic performance supplements the instructional and research components. The program is designed to increase the number of women scientists and engineers with graduate degrees, particularly those with an interest in a career with NASA.

The Effect of Jigsaw Technique on 6th Graders' Learning of Force and Motion Unit and Their Science Attitudes and Motivation

ERIC Educational Resources Information Center

Ural, Evrim; Ercan, Orhan; Gençoglan, Durdu Mehmet

2017-01-01

The study aims to investigate the effects of jigsaw technique on 6th graders' learning of "Force and Motion" unit, their science learning motivation and their attitudes towards science classes. The sample of the study consisted of 49 6th grade students from two different classes taking the Science and Technology course at a government…

ASEAN and Indochina: A Strategy for Regional Stability in the 1980’s.

DTIC Science & Technology

1984-12-01

regional powers. The resultant regional balance of power is precarious, unstable, and ever threatens to deteriorate into armed conflict. The unequal...an armed force that is capable of large scale defense. Ironically, while ostensibly defensively motivated, these efforts have resulted in a war machine... resulted in the atmosphere of tense uncertainty in Southeast Asia today. In contrast to Vietnamese motivations for their force -- structure, the other

[The motive force of evolution based on the principle of organismal adjustment evolution.].

PubMed

Cao, Jia-Shu

2010-08-01

From the analysis of the existing problems of the prevalent theories of evolution, this paper discussed the motive force of evolution based on the knowledge of the principle of organismal adjustment evolution to get a new understanding of the evolution mechanism. In the guide of Schrodinger's theory - "life feeds on negative entropy", the author proposed that "negative entropy flow" actually includes material flow, energy flow and information flow, and the "negative entropy flow" is the motive force for living and development. By modifying my own theory of principle of organismal adjustment evolution (not adaptation evolution), a new theory of "regulation system of organismal adjustment evolution involved in DNA, RNA and protein interacting with environment" is proposed. According to the view that phylogenetic development is the "integral" of individual development, the difference of negative entropy flow between organisms and environment is considered to be a motive force for evolution, which is a new understanding of the mechanism of evolution. Based on such understanding, evolution is regarded as "a changing process that one subsystem passes all or part of its genetic information to the next generation in a larger system, and during the adaptation process produces some new elements, stops some old ones, and thereby lasts in the larger system". Some other controversial questions related to evolution are also discussed.

Motivation and Adult Education.

ERIC Educational Resources Information Center

Taylor, J. Rodney

1982-01-01

The author reviews theories of human motivation: Lewin's force field analysis, Skinner's operant reinforcement theory, and Maslow's hierarchy of needs. He then extracts the implications of these theories for adult learning. SK)

Integration of Fiber-Optic Sensor Arrays into a Multi-Modal Tactile Sensor Processing System for Robotic End-Effectors

PubMed Central

Kampmann, Peter; Kirchner, Frank

2014-01-01

With the increasing complexity of robotic missions and the development towards long-term autonomous systems, the need for multi-modal sensing of the environment increases. Until now, the use of tactile sensor systems has been mostly based on sensing one modality of forces in the robotic end-effector. The use of a multi-modal tactile sensory system is motivated, which combines static and dynamic force sensor arrays together with an absolute force measurement system. This publication is focused on the development of a compact sensor interface for a fiber-optic sensor array, as optic measurement principles tend to have a bulky interface. Mechanical, electrical and software approaches are combined to realize an integrated structure that provides decentralized data pre-processing of the tactile measurements. Local behaviors are implemented using this setup to show the effectiveness of this approach. PMID:24743158

Health worker motivation in the context of HIV care and treatment challenges in Mbeya Region, Tanzania: A qualitative study

PubMed Central

2011-01-01

Background Health worker motivation can potentially affect the provision of health services. The HIV pandemic has placed additional strain on health service provision through the extra burden of increased testing and counselling, treating opportunistic infections and providing antiretroviral treatment. The aim of this paper is to explore the challenges generated by HIV care and treatment and their impact on health worker motivation in Mbeya Region, Tanzania. Methods Thirty in-depth interviews were conducted with health workers across the range of health care professions in health facilities in two high HIV-prevalence districts of Mbeya Region, Tanzania. A qualitative framework analysis was adopted for data analysis. Results The negative impact of HIV-related challenges on health worker motivation was confirmed by this study. Training seminars and workshops related to HIV contributed to the shortage of health workers in the facilities. Lower status workers were frequently excluded from training and were more severely affected by the consequent increase in workload as seminars were usually attended by higher status professionals who controlled access. Constant and consistent complaints by clients have undermined health workers' expectations of trust and recognition. Health workers were forced to take responsibility for dealing with problems arising from organisational inefficiencies within the health system. Conclusion HIV-related challenges undermine motivation among health workers in Mbeya, Tanzania with the burden falling most heavily on lower status workers. Strained relations between health workers and the community they serve, further undermine motivation of health workers. PMID:21992700

Women in Apprenticeship for Nontraditional Occupations. Graduate Study Research. Final Report, April 1, 1979-June 30, 1979.

ERIC Educational Resources Information Center

Green, Deborah A.

Though women are entering the paid work force in increasing numbers, their distribution across occupational categories is far from even. Women workers are clustered in traditional women's work jobs and represent only five percent of the nation's craft workers. In an effort to discover the motivations, experiences, and attitudes of women in…

The Finnish multisource national forest inventory: small-area estimation and map production

Treesearch

Erkki Tomppo

2009-01-01

A driving force motivating development of the multisource national forest inventory (MS-NFI) in connection with the Finnish national forest inventory (NFI) was the desire to obtain forest resource information for smaller areas than is possible using field data only without significantly increasing the cost of the inventory. A basic requirement for the method was that...

Multidrug Transport Protein NorM from Vibrio cholerae Simultaneously Couples to Sodium- and Proton-Motive Force*

PubMed Central

Jin, Yoonhee; Nair, Asha; van Veen, Hendrik W.

2014-01-01

Membrane transporters belonging to the multidrug and toxic compound extrusion family mediate the efflux of unrelated pharmaceuticals from the interior of the cell in organisms ranging from bacteria to human. These proteins are thought to fall into two classes that couple substrate efflux to the influx of either Na+ or H+. We studied the energetics of drug extrusion by NorM from Vibrio cholerae in proteoliposomes in which purified NorM protein was functionally reconstituted in an inside-out orientation. We establish that NorM simultaneously couples to the sodium-motive force and proton-motive force, and biochemically identify protein regions and residues that play important roles in Na+ or H+ binding. As the positions of protons are not available in current medium and high-resolution crystal structures of multidrug and toxic compound extrusion transporters, our findings add a previously unrecognized parameter to mechanistic models based of these structures. PMID:24711447

Environmental enrichment reduces the impact of novelty and motivational properties of ethanol in spontaneously hypertensive rats.

PubMed

de Carvalho, Cristiane Ribeiro; Pandolfo, Pablo; Pamplona, Fabrício Alano; Takahashi, Reinaldo Naoto

2010-03-17

The present study investigated the consequences of environmental enrichment on the impact of novelty and motivational properties of ethanol in spontaneously hypertensive rats (SHR), a validated model of attention deficit hyperactivity disorder (ADHD). This rat strain displays increased sensitivity to distinct classes of abused drugs, which makes it an interesting model for the study of the association between ADHD and drug abuse. Female SHR reared from weaning to adulthood in standard (SE) or enriched (EE) environment were tested on novelty-induced locomotion, saccharin consumption, ethanol consumption (forced and free-choice schedules) and ethanol-induced conditioned place preference (CPP). SHR reared in an EE showed reduced novelty-induced locomotion, consumed less saccharin and ethanol in a forced schedule and showed less ethanol preference in a free-choice schedule compared to SE rats. Moreover, EE rats did not develop CPP, whereas SE rats developed preference for ethanol (1.2g/kg). These results show that exposure to stimuli mimicking positive life experiences (environmental enrichment) induces persistent changes in the reward/motivational system of female SHR, suggesting an important role of the familiar environment during early stages of the neurodevelopment on the co-morbidity of ADHD and drug abuse. Copyright 2009 Elsevier B.V. All rights reserved.

Hope and Anxiety in Physics Class: Exploring Their Motivational Antecedents and Influence on Metacognition and Performance

ERIC Educational Resources Information Center

González, Antonio; Fernández, María-Victoria Carrera; Paoloni, Paola-Verónica

2017-01-01

Recent research on achievement in science asserts that motivation, emotion, and metacognition are important driving forces for learning. This study sought to examine the relationships between two physics class emotions (hope and anxiety), their motivational predictors (instrumentality and self-efficacy), and their effects on metacognitive problem…

Aniracetam restores motivation reduced by satiation in a choice reaction task in aged rats.

PubMed

Nakamura, K; Kurasawa, M

2001-01-01

This study aims to examine the effects of aniracetam on satiation-induced poor performance in a choice reaction task. Aged rats that mastered the task under food restriction stably maintained the task performance for a long period. Satiation by successive free feeding greatly diminished the performance. Satiation resulted in a decreased % correct, increased % omission and prolonged choice reaction time, indicating a reduction in lever response with low choice accuracy and slow responding speed. Repeated administration of aniracetam (30 mg/kg, po, for 14 days) partially recovered the choice accuracy and lever response, but not the responding speed, task-associated motor activity or impulsivity. In addition, aniracetam did not affect the animals' weights. These results indicate that satiation reduces motivation to perform and attain the task. Aniracetam may restore motivation, probably by improving poor behavioral states (daily attentional and vigilance failures), thereby creating the driving force.

Jemaah Islamiyah: Reevaluating the Most Dangerous Terrorist Threat in Southeast Asia

DTIC Science & Technology

2010-12-01

why some terrorist groups last longer than others, namely “ideological motivation , economic conditions, regime type, the size of groups, and/or the...States Air Force, RAND Corporation and Project Air Force (U.S.), The Dynamic Terrorist Threat: An Assessment of Group Motivations and Capabilities in a...in 2003 and 2004, then shifted tactics from car bombs to backpack bombs for their 2005 and 2009 attacks.58 Their operatives received safe haven and

Factors Influencing Learner Conceptions of Force: Exploring the Interaction among Visuospatial Ability, Motivation, and Conceptions of Newtonian Mechanics in University Undergraduates from an Evolutionary Perspective

NASA Astrophysics Data System (ADS)

Vallett, David Bruce

This study examined the relationships among visuospatial ability, motivation to learn science, and learner conceptions of force across commonly measured demographics with university undergraduates with the aim of examining the support for an evolved sense of force and motion. Demographic variables of interest included age, ethnicity, and gender, which served to determine the ubiquity of the effects of the exogenous variables. Participants (n=91) self selected from introductory physics courses at a large public university in the Mid-Atlantic region of the United States. Utilizing a single-group exploratory design, all participants completed a series of anonymous online instruments to assess the variables of interest. Analysis consisted of an ANOVA for significance testing of demographic variables and a single-level structural equation model (SEM) to ascertain the causal influence of visuospatial ability and affect in the form of motivation on learner conceptions of force. Results of the SEM indicated that while motivation had a nonsignificant (p>.05) impact with this sample, visuospatial ability had a strong (.5 unit change in physics achievement per unit of VSA, p<.05) influence on Newtonian conceptions of mechanics. The results of this study inform physics educators as to the factors underlying conceptual change in Newtonian physics and generate hypotheses regarding the cognitive processes and corresponding neural substrates associated with successful Newtonian reasoning.

Clinical ladder program implementation: a project guide.

PubMed

Ko, Yu Kyung; Yu, Soyoung

2014-11-01

This article describes the development of a clinical ladder program (CLP) implementation linked to a promotion system for nurses. The CLP task force developed criteria for each level of performance and a performance evaluation tool reflecting the self-motivation of the applicant for professional development. One year after implementation, the number of nurses taking graduate courses increased, and 7 nurses were promoted to nurse manager positions.

38 CFR 21.6054 - Criteria for determining good employment potential.

Code of Federal Regulations, 2012 CFR

2012-07-01

... employment prior to the onset of disability. (2) Strong motivation to return to the work force. (3... disagreement with a negative finding shall be considered evidence of motivation for employment, and may, when...

38 CFR 21.6054 - Criteria for determining good employment potential.

Code of Federal Regulations, 2013 CFR

2013-07-01

... employment prior to the onset of disability. (2) Strong motivation to return to the work force. (3... disagreement with a negative finding shall be considered evidence of motivation for employment, and may, when...

38 CFR 21.6054 - Criteria for determining good employment potential.

Code of Federal Regulations, 2014 CFR

2014-07-01

... employment prior to the onset of disability. (2) Strong motivation to return to the work force. (3... disagreement with a negative finding shall be considered evidence of motivation for employment, and may, when...

38 CFR 21.6054 - Criteria for determining good employment potential.

Code of Federal Regulations, 2010 CFR

2010-07-01

... employment prior to the onset of disability. (2) Strong motivation to return to the work force. (3... disagreement with a negative finding shall be considered evidence of motivation for employment, and may, when...

The Relationship among Strategic Writing Behavior, Writing Motivation, and Writing Performance with Young, Developing Writers

ERIC Educational Resources Information Center

Graham, Steve; Harris, Karen R.; Kiuhara, Sharlene A.; Fishman, Evan J.

2017-01-01

Our study tested whether learning is shaped by fundamental cognitive and motivational forces in the academic domain of writing. We examined whether strategic writing behavior and motivation (attitudes toward writing and self-efficacy) made a statistically significant and unique contribution to the prediction of writing quality and number of words…

Why We Need "Why": Addressing Implicit Motivation in Human Sexuality Education

ERIC Educational Resources Information Center

Dyson, Donald A.

2005-01-01

Within the study of human sexuality, researchers have undergone a cognitive shift toward the use of self-report measures to identify motivations for sexual behaviors. This article creates an argument for a re-orientation to including implicit or "drive" motivations within the field in order to better understand the forces that likely determine…

Intrinsic-extrinsic factors in sport motivation.

PubMed

Pedersen, Darhl M

2002-10-01

Participants were 83 students (36 men and 47 women). 10 intrinsic-extrinsic factors involved in sport motivation were obtained. The factors were generated from items obtained from the participants rather than items from the experimenter. This was done to avoid the possible influence of preconceptions on the part of the experimenter regarding what the final dimensions may be. Obtained motivational factors were Social Reinforcement, Fringe Benefits, Fame and Fortune, External Forces, Proving Oneself, Social Benefits, Mental Enrichment, Expression of Self, Sense of Accomplishment, and Self-enhancement. Each factor was referred to an intrinsic-extrinsic dimension to describe its relative position on that dimension. The order of the factors as listed indicates increasing intrinsic motivation. i.e., the first four factors were rated in the extrinsic range, whereas the remaining six were rated to be in the intrinsic range. Next, the participants rated the extent to which each of the various factors was involved in their decision to participate in sport activities. The pattern of use of the motivational factors was the same for both sexes except that men indicated greater use of the Fringe Benefits factor. Overall, the more intrinsic a sport motivation factor was rated, the more likely it was to be rated as a factor in actual sport participation.

Treatment motivation of men with ED: what motivates men with ED to seek professional help and how can women support their partners?

PubMed

Gerster, S; Günzler, C; Roesler, C; Leiber, C; Berner, M M

2013-01-01

Although ED can impair sexual satisfaction as well as the quality of partnership and life, men affected often avoid seeking treatment. There is growing evidence that women have an influence on their partner's help-seeking behavior. This qualitative study examined men with ED and their female partners in order to detect motivational factors for men to seek treatment and motivational actions of the women to support their partners. Twelve couples took part in a semi-structured telephone interview, which was performed separately in men and women. Analysis was on the basis of the Grounded Theory. The identified motivational factors could be divided into extrinsic (for example, media, female partner) and intrinsic (for example, desire to clarify the cause of the ED, hope for improvement) factors. Women can support their partners in treatment-seeking through various motivational actions such as talking with each other, showing interest and dealing actively with the problem, appealing to the male self-esteem, supporting the doctor's visit, forcing the treatment, active cooperation and participation in the treatment or initiating sexual intercourse. On the basis of these findings, recommendations for women were developed to support their partners and increase the probability of help-seeking behavior.

Health in our hands, but not in our heads: understanding hygiene motivation in Ghana.

PubMed

Scott, Beth; Curtis, Val; Rabie, Tamer; Garbrah-Aidoo, Nana

2007-07-01

Each year more than 2 million children die from diarrhoeal diseases; the same number again die from acute respiratory infections. The simple hygiene behaviour of washing hands with soap represents an effective way of preventing the transmission of many of these infections. However, rates of handwashing across the globe are low, presenting a challenge for health promotion programmes. Behaviour change is not easy, and past efforts based upon health education have met with limited success. New approaches are needed. We propose that much can be learnt from the world of consumer marketing. Rather than base communications programmes for behaviour change on increasing knowledge, marketers aim to respond to the inner desires and motivations of their target audiences. This study used consumer research to investigate the factors motivating handwashing with soap in order to inform a national communications campaign for Ghana. It revealed that the strongest motivators for handwashing with soap were related to nurturance, social acceptance and disgust of faeces and latrines, especially their smell. Protection from disease is mentioned as a driving force, but was not a key motivator of handwashing behaviour. The ways in which these findings have been translated into a handwash promotion campaign are discussed.

The brain correlates of the effects of monetary and verbal rewards on intrinsic motivation.

PubMed

Albrecht, Konstanze; Abeler, Johannes; Weber, Bernd; Falk, Armin

2014-01-01

Apart from everyday duties, such as doing the laundry or cleaning the house, there are tasks we do for pleasure and enjoyment. We do such tasks, like solving crossword puzzles or reading novels, without any external pressure or force; instead, we are intrinsically motivated: we do the tasks because we enjoy doing them. Previous studies suggest that external rewards, i.e., rewards from the outside, affect the intrinsic motivation to engage in a task: while performance-based monetary rewards are perceived as controlling and induce a business-contract framing, verbal rewards praising one's competence can enhance the perceived self-determination. Accordingly, the former have been shown to decrease intrinsic motivation, whereas the latter have been shown to increase intrinsic motivation. The present study investigated the neural processes underlying the effects of monetary and verbal rewards on intrinsic motivation in a group of 64 subjects applying functional magnetic resonance imaging (fMRI). We found that, when participants received positive performance feedback, activation in the anterior striatum and midbrain was affected by the nature of the reward; compared to a non-rewarded control group, activation was higher while monetary rewards were administered. However, we did not find a decrease in activation after reward withdrawal. In contrast, we found an increase in activation for verbal rewards: after verbal rewards had been withdrawn, participants showed a higher activation in the aforementioned brain areas when they received success compared to failure feedback. We further found that, while participants worked on the task, activation in the lateral prefrontal cortex was enhanced after the verbal rewards were administered and withdrawn.

The brain correlates of the effects of monetary and verbal rewards on intrinsic motivation

PubMed Central

Albrecht, Konstanze; Abeler, Johannes; Weber, Bernd; Falk, Armin

2014-01-01

Apart from everyday duties, such as doing the laundry or cleaning the house, there are tasks we do for pleasure and enjoyment. We do such tasks, like solving crossword puzzles or reading novels, without any external pressure or force; instead, we are intrinsically motivated: we do the tasks because we enjoy doing them. Previous studies suggest that external rewards, i.e., rewards from the outside, affect the intrinsic motivation to engage in a task: while performance-based monetary rewards are perceived as controlling and induce a business-contract framing, verbal rewards praising one's competence can enhance the perceived self-determination. Accordingly, the former have been shown to decrease intrinsic motivation, whereas the latter have been shown to increase intrinsic motivation. The present study investigated the neural processes underlying the effects of monetary and verbal rewards on intrinsic motivation in a group of 64 subjects applying functional magnetic resonance imaging (fMRI). We found that, when participants received positive performance feedback, activation in the anterior striatum and midbrain was affected by the nature of the reward; compared to a non-rewarded control group, activation was higher while monetary rewards were administered. However, we did not find a decrease in activation after reward withdrawal. In contrast, we found an increase in activation for verbal rewards: after verbal rewards had been withdrawn, participants showed a higher activation in the aforementioned brain areas when they received success compared to failure feedback. We further found that, while participants worked on the task, activation in the lateral prefrontal cortex was enhanced after the verbal rewards were administered and withdrawn. PMID:25278834

Chloroplast ATP Synthase Modulation of the Thylakoid Proton Motive Force: Implications for Photosystem I and Photosystem II Photoprotection

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

Kanazawa, Atsuko; Ostendorf, Elisabeth; Kohzuma, Kaori

In wild type plants, decreasing CO 2 lowers the activity of the chloroplast ATP synthase, slowing proton efflux from the thylakoid lumen resulting in buildup of thylakoid proton motive force (pmf). The resulting acidification of the lumen regulates both light harvesting, via the qE mechanism, and photosynthetic electron transfer through the cytochrome b 6f complex. Here in this paper, we show that the cfq mutant of Arabidopsis, harboring single point mutation in its γ-subunit of the chloroplast ATP synthase, increases the specific activity of the ATP synthase and disables its down-regulation under low CO 2. The increased thylakoid proton conductivitymore » (g H +) in cfq results in decreased pmf and lumen acidification, preventing full activation of qE and more rapid electron transfer through the b6f complex, particularly under low CO 2 and fluctuating light. These conditions favor the accumulation of electrons on the acceptor side of PSI, and result in severe loss of PSI activity. Comparing the current results with previous work on the pgr5 mutant suggests a general mechanism where increased PSI photodamage in both mutants is caused by loss of pmf, rather than inhibition of CEF per se. Overall, our results support a critical role for ATP synthase regulation in maintaining photosynthetic control of electron transfer to prevent photodamage.« less

Chloroplast ATP Synthase Modulation of the Thylakoid Proton Motive Force: Implications for Photosystem I and Photosystem II Photoprotection

DOE PAGES

Kanazawa, Atsuko; Ostendorf, Elisabeth; Kohzuma, Kaori; ...

2017-05-03

In wild type plants, decreasing CO 2 lowers the activity of the chloroplast ATP synthase, slowing proton efflux from the thylakoid lumen resulting in buildup of thylakoid proton motive force (pmf). The resulting acidification of the lumen regulates both light harvesting, via the qE mechanism, and photosynthetic electron transfer through the cytochrome b 6f complex. Here in this paper, we show that the cfq mutant of Arabidopsis, harboring single point mutation in its γ-subunit of the chloroplast ATP synthase, increases the specific activity of the ATP synthase and disables its down-regulation under low CO 2. The increased thylakoid proton conductivitymore » (g H +) in cfq results in decreased pmf and lumen acidification, preventing full activation of qE and more rapid electron transfer through the b6f complex, particularly under low CO 2 and fluctuating light. These conditions favor the accumulation of electrons on the acceptor side of PSI, and result in severe loss of PSI activity. Comparing the current results with previous work on the pgr5 mutant suggests a general mechanism where increased PSI photodamage in both mutants is caused by loss of pmf, rather than inhibition of CEF per se. Overall, our results support a critical role for ATP synthase regulation in maintaining photosynthetic control of electron transfer to prevent photodamage.« less

Micro-telerobotic applications for microsurgery

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

Ford, W.E.; Morimoto, A.K.; Kozlowski, D.M.

MicroDexterity Systems Inc. and Sandia National Laboratories are collaborating on the design of a six degree-of-freedom surgeon-controlled micropositioner and a six degree-of-freedom surgeon-controlled master for use in microsurgery. A control system will provide the linkage between the force-reflecting master and micropositioner for force scaling, position scaling, and tremor filtering. The technologies developed by this project are expected to enhance the skills of surgeons, improve the success rates for existing microsurgical procedures, make new high-dexterity procedures possible, and ultimately reduce surgical costs by increasing the precision and speed of operations. This paper discusses the motivation, approach, and accomplishments to date.

Relations among appetitive aggression, post-traumatic stress and motives for demobilization: a study in former Colombian combatants

PubMed Central

2013-01-01

Background Former combatants have frequently reported that aggressive behaviour can be appetitive and appealing. This appetitive aggression (AA) may be adaptive for survival in a violent environment, as it is associated with a reduced risk of combat-related psychological traumatization. At the same time, AA might impair motivation for re-integration to civil life after ending active duty. Whereas in Colombia those combatants who volunteered for demobilization were mostly tired of fighting, those who demobilized collectively did so mainly by force of the government. We predicted those who were demobilized collectively would still be attracted to violence, and benefit from the resilience against trauma-related mental suffering, moderated by appetitive aggression, as they would have continued fighting had they not been forced to stop. Method A sample of 252 former Colombian former combatants from paramilitary and guerrilla forces was investigated. Appetitive aggression was assessed using the Appetitive Aggression Scale (AAS) and post-traumatic stress disorder (PTSD) symptoms with the PTSD Symptom Scale-Interview (PSS-I). We distinguished between individual and group demobilization and assessed reasons for disarmament. Results Most of the guerrilla troops who demobilized individually and were tired of fighting reported both an attraction to violence as well as increased trauma symptoms, owing to their former engagement in violent behaviour. In contrast, among those who were demobilized collectively, appetitive aggression was associated with a reduced risk of PTSD. However, this effect was not present in those combatants in the upper quartile of PTSD symptom severity. Conclusion The influence of combat experience on traumatization, as well as the motivation for demobilization, differs remarkably between those combatants who demobilized individually and those who were members of a group that was forced to demobilize. This has important implications for the implementation of re-integration programmes and therapeutic interventions. PMID:23575192

"We Are Not as They Think about Us": Exploring Omani EFL Learners' "Selves" in Digital Social Spaces

ERIC Educational Resources Information Center

Little, Sabine; Al Wahaibi, Suad

2017-01-01

This paper reports a research study of Omani EFL learners' motivation to engage in social technologies through the medium of English, adopting Dörnyei's L2 Motivational Self System as the main theoretical framework, whilst exploring other emergent context-sensitive motivational driving forces. The purpose of the research study was to explore…

Personal Variation in Preference for Sweetness: Effects of Age and Obesity.

PubMed

Bobowski, Nuala; Mennella, Julie A

2017-10-01

Use of nonnutritive sweeteners (NNSs), which provide sweet taste with few to no calories, has increased, but data on whether children's hedonic responses to NNSs differ from nutritive sugars or from adults' hedonic responses are limited. Most preferred levels of sucrose and the NNS sucralose were determined via a forced-choice tracking procedure in 48 children, 7-14 years (mean = 10 years), and 34 adults. Each participant also rated the liking of these taste stimuli, as well as varying concentrations of aspartame on 3- and 5-point facial hedonic scales. Anthropometric measures were obtained, and motives for palatable food intake were assessed with the Palatable Eating Motives Scale (PEMS, adults) and Kids PEMS. While use of the 3-point scale showed no age-related differences in liking of sweeteners, the 5-point scale showed that more children than adults liked higher concentrations of sucrose, sucralose, and aspartame, and the tracking procedure showed that children most preferred higher concentrations of sucrose and sucralose than adults. Regardless of age, sweet preference did not differ between obese and nonobese participants and showed no association with motives for eating palatable foods. Children's body mass index z-scores were positively associated with social and conformity motive scores for eating palatable foods. Research should move beyond measures of variation in sweet taste hedonics to include identifying motives, and the physiological and psychological consequences of eating sweets, to shed light on what children are more vulnerable to develop unfavorable eating habits, increasing risk for obesity, and other diseases.

Multidrug transport protein norM from vibrio cholerae simultaneously couples to sodium- and proton-motive force.

PubMed

Jin, Yoonhee; Nair, Asha; van Veen, Hendrik W

2014-05-23

Membrane transporters belonging to the multidrug and toxic compound extrusion family mediate the efflux of unrelated pharmaceuticals from the interior of the cell in organisms ranging from bacteria to human. These proteins are thought to fall into two classes that couple substrate efflux to the influx of either Na(+) or H(+). We studied the energetics of drug extrusion by NorM from Vibrio cholerae in proteoliposomes in which purified NorM protein was functionally reconstituted in an inside-out orientation. We establish that NorM simultaneously couples to the sodium-motive force and proton-motive force, and biochemically identify protein regions and residues that play important roles in Na(+) or H(+) binding. As the positions of protons are not available in current medium and high-resolution crystal structures of multidrug and toxic compound extrusion transporters, our findings add a previously unrecognized parameter to mechanistic models based of these structures. © 2014 by The American Society for Biochemistry and Molecular Biology, Inc.

Characteristics of motive force derived from trajectory analysis of Amoeba proteus.

PubMed

Masaki, Noritaka; Miyoshi, Hiromi; Tsuchiya, Yoshimi

2007-01-01

We used a monochromatic charge-coupled-device camera to observe the migration behavior of Amoeba proteus every 5 s over a time course of 10000 s in order to investigate the characteristics of its centroid movement (cell velocity) over the long term. Fourier transformation of the time series of the cell velocity revealed that its power spectrum exhibits a Lorentz type profile with a relaxation time of a few hundred seconds. Moreover, some sharp peaks were found in the power spectrum, where the ratios of any two frequencies corresponding to the peaks were expressed as simple rational numbers. Analysis of the trajectory using a Langevin equation showed that the power spectrum reflects characteristics of the cell's motive force. These results suggest that some phenomena relating to the cell's motility, such as protoplasmic streaming and the sol-gel transformation of actin filaments, which seem to be independent phenomena and have different relaxation times, interact with each other and cooperatively participate in the generation process of the motive force.

Recruitment and retention of psychosocial rehabilitation workers.

PubMed

Blankertz, L E; Robinson, S E

1997-01-01

Recruitment and retention of direct service workers can be a major problem for administrators of community mental health organizations. This paper, based on a nationwide study of psychosocial rehabilitation workers and administrators, examines the congruity of worker and administrator perceptions of worker motivation for entering and leaving the field. Workers are motivated by the intrinsic nature of the work to enter into and stay in the field. Job burnout is as important as low pay in forcing workers out of the field. Administrators, however, perceive money to be a major factor motivating workers to enter the field and perceive external opportunities as forces that pull them away. Thus, administrators must address their workers' needs if their agencies are to offer quality services.

Your Language or Mine? Or English as a Lingua Franca? Comparing Effectiveness in English as a Lingua Franca and L1-L2 Interactions: Implications for Corporate Language Policies

ERIC Educational Resources Information Center

van Mulken, Margot; Hendriks, Berna

2015-01-01

For multinational corporations, the need for efficiency and control has motivated the choice for a corporate language. However, increasing internationalisation has forced corporations to rethink their language policies to cater to the changing demands of the multicultural and multilingual workplace. This paper explores two related issues. First,…

Hypothalamic orexin stimulates feeding-associated glucose utilization in skeletal muscle via sympathetic nervous system.

PubMed

Shiuchi, Tetsuya; Haque, Mohammad Shahidul; Okamoto, Shiki; Inoue, Tsuyoshi; Kageyama, Haruaki; Lee, Suni; Toda, Chitoku; Suzuki, Atsushi; Bachman, Eric S; Kim, Young-Bum; Sakurai, Takashi; Yanagisawa, Masashi; Shioda, Seiji; Imoto, Keiji; Minokoshi, Yasuhiko

2009-12-01

Hypothalamic neurons containing orexin (hypocretin) are activated during motivated behaviors and active waking. We show that injection of orexin-A into the ventromedial hypothalamus (VMH) of mice or rats increased glucose uptake and promoted insulin-induced glucose uptake and glycogen synthesis in skeletal muscle, but not in white adipose tissue, by activating the sympathetic nervous system. These effects of orexin were blunted in mice lacking beta-adrenergic receptors but were restored by forced expression of the beta(2)-adrenergic receptor in both myocytes and nonmyocyte cells of skeletal muscle. Orexin neurons are activated by conditioned sweet tasting and directly excite VMH neurons, thereby increasing muscle glucose metabolism and its insulin sensitivity. Orexin and its receptor in VMH thus play a key role in the regulation of muscle glucose metabolism associated with highly motivated behavior by activating muscle sympathetic nerves and beta(2)-adrenergic signaling.

[Attempted and completed homicide in Hamburg--a comparison of two six-year periods].

PubMed

Herrmann, Julia; Gehl, Axel; Püschel, Klaus; Anders, Sven

2010-01-01

The present study compared cases of attempted and completed homicide in Hamburg from 1984 to 1989 and from 1995 to 2000 (n = 887). Data collection was performed using the police records. Attempted homicide showed a significant increase (34.8% vs. 57.9%, P < 0.0001). The majority of the victims and offenders were male with the share of male victims increasing from 59.7% to 74.2% (P < 0.0001). The age of the victims and offenders ranged between 22 and 40 years in both periods. The share of persons with a nationality other than German increased both in the victims (23.1% vs. 37.2%, P < 0.0001) and in the offenders (26.8% vs. 37.2%, P < 0.0001). The most common motives were interpersonal conflicts and robbery. The most frequently used forms of violence were sharp force, blunt force and strangulation.

Hexameric and pentameric complexes of the ExbBD energizer in the Ton system.

PubMed

Maki-Yonekura, Saori; Matsuoka, Rei; Yamashita, Yoshiki; Shimizu, Hirofumi; Tanaka, Maiko; Iwabuki, Fumie; Yonekura, Koji

2018-04-17

Gram-negative bacteria import essential nutrients such as iron and vitamin B 12 through outer membrane receptors. This process utilizes proton motive force harvested by the Ton system made up of three inner membrane proteins, ExbB, ExbD and TonB. ExbB and ExbD form the proton channel that energizes uptake through TonB. Recently, crystal structures suggest that the ExbB pentamer is the scaffold. Here, we present structures of hexameric complexes of ExbB and ExbD revealed by X-ray crystallography and single particle cryo-EM. Image analysis shows that hexameric and pentameric complexes coexist, with the proportion of hexamer increasing with pH. Channel current measurement and 2D crystallography support the existence and transition of the two oligomeric states in membranes. The hexameric complex consists of six ExbB subunits and three ExbD transmembrane helices enclosed within the central channel. We propose models for activation/inactivation associated with hexamer and pentamer formation and utilization of proton motive force. © 2018, Maki-Yonekura et al.

Learning in a Virtual Environment Using Haptic Systems for Movement Re-Education: Can This Medium Be Used for Remodeling Other Behaviors and Actions?

PubMed Central

Merians, Alma S; Fluet, Gerard G; Qiu, Qinyin; Lafond, Ian; Adamovich, Sergei V

2011-01-01

Robotic systems that are interfaced with virtual reality gaming and task simulations are increasingly being developed to provide repetitive intensive practice to promote increased compliance and facilitate better outcomes in rehabilitation post-stroke. A major development in the use of virtual environments (VEs) has been to incorporate tactile information and interaction forces into what was previously an essentially visual experience. Robots of varying complexity are being interfaced with more traditional virtual presentations to provide haptic feedback that enriches the sensory experience and adds physical task parameters. This provides forces that produce biomechanical and neuromuscular interactions with the VE that approximate real-world movement more accurately than visual-only VEs, simulating the weight and force found in upper extremity tasks. The purpose of this article is to present an overview of several systems that are commercially available for ambulation training and for training movement of the upper extremity. We will also report on the system that we have developed (NJIT-RAVR system) that incorporates motivating and challenging haptic feedback effects into VE simulations to facilitate motor recovery of the upper extremity post-stroke. The NJIT-RAVR system trains both the upper arm and the hand. The robotic arm acts as an interface between the participants and the VEs, enabling multiplanar movements against gravity in a three-dimensional workspace. The ultimate question is whether this medium can provide a motivating, challenging, gaming experience with dramatically decreased physical difficulty levels, which would allow for participation by an obese person and facilitate greater adherence to exercise regimes. PMID:21527097

Achievement Motivation of the High School Students: A Case Study among Different Communities of Goalpara District of Assam

ERIC Educational Resources Information Center

Sarangi, C.

2015-01-01

Achievement motivation is a consistent striving force of an individual to achieve success to a certain standard of excellence in competing situation. In this study an attempt was made to study the effect of achievement motivation on the academic achievement of the high school students of tribal and non tribal communities in relation to their sex…

Prison hunger strikes: why the motive matters.

PubMed

Annas, G J

1982-12-01

Force feeding of hunger-striking prisoners is discussed in the context of three 1982 state appellate court decisions involving the right to refuse treatment. The Supreme Court of Georgia accepted a prisoner's argument; courts in New York and West Virginia found a compelling state interest that justified force feeding, as did an earlier Massachusetts decision that rejected a prisoner's refusal of renal dialysis. The author contends that the Georgia court erred in not distinguishing the motivation of the prisoner--to manipulate the prison system--from that of patients who refuse treatment.

Job satisfaction and motivation: how do we inspire employees?

PubMed

Alshallah, Sahar

2004-01-01

Productivity is defined as the efficient and effective use of resources with minimum waste and effort to achieve outcome. We live in a world that has limited resources. The health care industry faces this limitation more than any other industry. With these challenges facing health care administrators, the concept of productivity, job satisfaction and motivation become very important. Employee satisfaction and retention have always been an important issue for physicians, medical centers and businesses in general. Conventional human resources theories, developed some 50 years ago by Maslow and Herzberg, suggest that satisfied employees tend to be more productive, creative and committed to their employers. People are essential to productivity. The success of productivity improvement strategy is dependent on employee commitment, job satisfaction, skills, and motivation. Maslow's theory consists of a 5-level pyramid: physiologic or basic survival; physical and mental safety; sense of belonging; accomplishment, creativity, and growth; and self-actualization. Herzberg's theory suggests there are 2 groups of factors: hygiene (which satisfy) and motivation. The terms "job satisfaction" and "motivation" have, in my experience, become used interchangeably. There is a difference. Job satisfaction is an individual's emotional response to his or her current job condition, while motivation is the driving force to pursue and satisfy one's needs. Maslow and Herzberg's theories can be easily applied to the workplace. Managers can help employees achieve overall job satisfaction, which, with the employee's internal motivation drive, increase performance on the job.

Joint Operating Environment: Trends and Challenges for the Future Joint Force Through 2030

DTIC Science & Technology

2007-12-01

unmanned underwater vehicles loom on the horizon that can be swarmed against our ports and cities. Self - healing , networked minefields will... robots in an effort to provide the basic physical labor needed by the society. Russia has seen a major withdrawal of it population from the Far...of criminal elements. International organized crime, motivated by greed and self -interest, may increase as potential security threats to the

An investigation into electromagnetic force models: differences in global and local effects demonstrated by selected problems

NASA Astrophysics Data System (ADS)

Reich, Felix A.; Rickert, Wilhelm; Müller, Wolfgang H.

2018-03-01

This study investigates the implications of various electromagnetic force models in macroscopic situations. There is an ongoing academic discussion which model is "correct," i.e., generally applicable. Often, gedankenexperiments with light waves or photons are used in order to motivate certain models. In this work, three problems with bodies at the macroscopic scale are used for computing theoretical model-dependent predictions. Two aspects are considered, total forces between bodies and local deformations. By comparing with experimental data, insight is gained regarding the applicability of the models. First, the total force between two cylindrical magnets is computed. Then a spherical magnetostriction problem is considered to show different deformation predictions. As a third example focusing on local deformations, a droplet of silicone oil in castor oil is considered, placed in a homogeneous electric field. By using experimental data, some conclusions are drawn and further work is motivated.

African Immigrants in Low-Wage Direct Health Care: Motivations, Job Satisfaction, and Occupational Mobility.

PubMed

Covington-Ward, Yolanda

2017-06-01

This study explores motivations, job satisfaction, and overall perceived occupational mobility for African immigrants working in low-wage direct health care occupations. The study uses qualitative semi-structured interviews with a sample of thirty African immigrant workers in the greater Pittsburgh metropolitan area. Results show that four major themes captured the motivations of interviewees for doing direct care work: passion for care work, quick money, easily obtained employment, and direct care work as a pathway to other health occupations. The majority of the interviewees were satisfied with their jobs, yet almost all of them saw their occupations as temporary or transitional employment. Most of the interviewees also saw their jobs as lacking occupational mobility. In light of the increased national demand for direct care workers, the growing numbers of immigrants in the direct care labor force, and the high turnover and low retention rates of direct care workers overall, the study suggests that more must be done to make direct care work attractive and rewarding for African immigrant workers.

Exploring Leader Identity and Development.

PubMed

Priest, Kerry L; Middleton, Eric

2016-01-01

Taking on a leader identity can be a motivating force for pursuing leader development. This chapter explores the reciprocal and recursive nature of identity development and leader development, emphasizing how shifting views of self influence one's motivation to develop as a leader. © 2016 Wiley Periodicals, Inc., A Wiley Company.

Phenazine redox cycling enhances anaerobic survival in Pseudomonas aeruginosa by facilitating generation of ATP and a proton-motive force

PubMed Central

Glasser, Nathaniel R.; Kern, Suzanne E.

2014-01-01

Summary While many studies have explored the growth of Pseudomonas aeruginosa, comparatively few have focused on its survival. Previously, we reported that endogenous phenazines support the anaerobic survival of P. aeruginosa, yet the physiological mechanism underpinning survival was unknown. Here, we demonstrate that phenazine redox cycling enables P. aeruginosa to oxidize glucose and pyruvate into acetate, which promotes survival by coupling acetate and ATP synthesis through the activity of acetate kinase. By measuring intracellular NAD(H) and ATP concentrations, we show that survival is correlated with ATP synthesis, which is tightly coupled to redox homeostasis during pyruvate fermentation but not during arginine fermentation. We also show that ATP hydrolysis is required to generate a proton-motive force using the ATP synthase complex during fermentation. Together, our results suggest that phenazines enable maintenance of the proton-motive force by promoting redox homeostasis and ATP synthesis. This work demonstrates the more general principle that extracellular redox-active molecules, such as phenazines, can broaden the metabolic versatility of microorganisms by facilitating energy generation. PMID:24612454

Hacking the thylakoid proton motive force for improved photosynthesis: modulating ion flux rates that control proton motive force partitioning into Δψ and ΔpH.

PubMed

Davis, Geoffry A; Rutherford, A William; Kramer, David M

2017-09-26

There is considerable interest in improving plant productivity by altering the dynamic responses of photosynthesis in tune with natural conditions. This is exemplified by the 'energy-dependent' form of non-photochemical quenching ( q E ), the formation and decay of which can be considerably slower than natural light fluctuations, limiting photochemical yield. In addition, we recently reported that rapidly fluctuating light can produce field recombination-induced photodamage (FRIP), where large spikes in electric field across the thylakoid membrane (Δ ψ ) induce photosystem II recombination reactions that produce damaging singlet oxygen ( 1 O 2 ). Both q E and FRIP are directly linked to the thylakoid proton motive force ( pmf ), and in particular, the slow kinetics of partitioning pmf into its ΔpH and Δ ψ components. Using a series of computational simulations, we explored the possibility of 'hacking' pmf partitioning as a target for improving photosynthesis. Under a range of illumination conditions, increasing the rate of counter-ion fluxes across the thylakoid membrane should lead to more rapid dissipation of Δ ψ and formation of ΔpH. This would result in increased rates for the formation and decay of q E while resulting in a more rapid decline in the amplitudes of Δ ψ -spikes and decreasing 1 O 2 production. These results suggest that ion fluxes may be a viable target for plant breeding or engineering. However, these changes also induce transient, but substantial mismatches in the ATP : NADPH output ratio as well as in the osmotic balance between the lumen and stroma, either of which may explain why evolution has not already accelerated thylakoid ion fluxes. Overall, though the model is simplified, it recapitulates many of the responses seen in vivo , while spotlighting critical aspects of the complex interactions between pmf components and photosynthetic processes. By making the programme available, we hope to enable the community of photosynthesis researchers to further explore and test specific hypotheses.This article is part of the themed issue 'Enhancing photosynthesis in crop plants: targets for improvement'. © 2017 The Author(s).

The Influence of Swirl Brakes and a Tip Discharge Orifice on the Rotordynamic Forces Generated by Discharge-to-Suction Leakage Flows in Shrouded Centrifugal Pumps

NASA Technical Reports Server (NTRS)

Sivo, Joseph M.; Acosta, A. J.; Brennen, C. E.; Caughey, T. K.

1993-01-01

Recent experiments conducted in the Rotor Force Test Facility at the California Institute of Technology have examined the effects of a tip leakage restriction and swirl brakes on the rotordynamic forces due to leakage flows on an impeller undergoing a prescribed circular whirl. The experiments simulate the leakage flow conditions and geometry of the Alternate Turbopump Design (ATD) of the Space Shuttle High Pressure Oxygen Turbopump and are critical to evaluating the pump's rotordynamic instability problems. Previous experimental and analytical results have shown that discharge-to-suction leakage flows in the annulus of a shrouded centrifugal pump contribute substantially to the fluid induced rotordynamic forces. Also, previous experiments have shown that leakage inlet (pump discharge) swirl can increase the cross-coupled stiffness coefficient and hence increase the range of positive whirl for which the tangential force is destabilizing. In recent experimental work, the present authors demonstrated that when the swirl velocity within the leakage path is reduced by the introduction of ribs or swirl brakes, then a substantial decrease in both the destabilizing normal and tangential forces could be achieved. Motivation for the present research is that previous experiments have shown that restrictions such as wear rings or orifices at pump inlets affect the leakage forces. Recent pump designs such as the Space Shuttle Alternate Turbopump Design (ATD) utilize tip orifices at discharge for the purpose of establishing axial thrust balance. The ATD has experienced rotordynamic instability problems and one may surmise that these tip discharge orifices may also have an important effect on the normal and tangential forces in the plane of impeller rotation. The present study determines if such tip leakage restrictions contribute to undesirable rotordynamic forces. Additional motivation for the present study is that the widening of the leakage path annular clearance and the installation of swirl brakes in the ATD has been proposed to solve its instability problems. The present study assesses the effect of such a design modification on the rotordynamic forces. The experimental apparatus consists of a solid or dummy impeller, a housing instrumented for pressure measurements, a rotating dynamometer and an eccentric whirl mechanism. The solid impeller is used so that leakage flow contributions to the forces are measured, but the main throughflow contributions are not experienced. The inner surface of the housing has been modified to accommodate meridional ribs or swirl brakes within the leakage annulus. In addition, the housing has been modified to accommodate a discharge orifice that qualitatively simulates one side of the balance piston orifice of the Space Shuttle ATD. Results indicate the detrimental effects of a discharge orifice and the beneficial effects of brakes. Plots of the tangential and normal forces versus whirl ratio show a substantial increase in these forces along with destabilizing resonances at some positive whirl ratios when a discharge orifice is added. When brakes are added, some of the detrimental effects of the orifice are reduced. For the tangential force, a plot versus whirl ratio shows a significant reduction and a destabilizing resonance appears to be eliminated. For the normal force, although the overall force is not reduced, again a destabilizing resonance appears to be eliminated.

Distinct effects of apathy and dopamine on effort-based decision-making in Parkinson's disease.

PubMed

Le Heron, Campbell; Plant, Olivia; Manohar, Sanjay; Ang, Yuen-Siang; Jackson, Matthew; Lennox, Graham; Hu, Michele T; Husain, Masud

2018-05-01

Effort-based decision-making is a cognitive process crucial to normal motivated behaviour. Apathy is a common and disabling complication of Parkinson's disease, but its aetiology remains unclear. Intriguingly, the neural substrates associated with apathy also subserve effort-based decision-making in animal models and humans. Furthermore, the dopaminergic system plays a core role in motivating effortful behaviour for reward, and its dysfunction has been proposed to play a crucial role in the aetiology of apathy in Parkinson's disease. We hypothesized that disrupted effort-based decision-making underlies the syndrome of apathy in Parkinson's disease, and that this disruption may be modulated by the dopaminergic system. An effort-based decision-making task was administered to 39 patients with Parkinson's disease, with and without clinical apathy, ON and OFF their normal dopaminergic medications across two separate sessions, as well as 32 healthy age- and gender-matched controls. On a trial-by-trial basis, participants decided whether to accept or reject offers of monetary reward in return for exerting different levels of physical effort via handheld, individually calibrated dynamometers. Effort and reward were manipulated independently, such that offers spanned the full range of effort/reward combinations. Apathy was assessed using the Lille apathy rating scale. Motor effects of the dopamine manipulation were assessed using the Unified Parkinson's Disease Rating Scale part three motor score. The primary outcome variable was choice (accept/decline offer) analysed using a hierarchical generalized linear mixed effects model, and the vigour of squeeze (Newtons exerted above required force). Both apathy and dopamine depletion were associated with reduced acceptance of offers. However, these effects were driven by dissociable patterns of responding. While apathy was characterized by increased rejection of predominantly low reward offers, dopamine increased responding to high effort, high reward offers, irrespective of underlying motivational state. Dopamine also exerted a main effect on motor vigour, increasing force production independently of reward offered, while apathy did not affect this measure. The findings demonstrate that disrupted effort-based decision-making underlies Parkinson's disease apathy, but in a manner distinct to that caused by dopamine depletion. Apathy is associated with reduced incentivization by the rewarding outcomes of actions. In contrast, dopamine has a general effect in motivating behaviour for high effort, high reward options without altering the response pattern that characterizes the apathetic state. Thus, the motivational deficit observed in Parkinson's disease appears not to be simply secondary to dopaminergic depletion of mesocorticolimbic pathways, suggesting non-dopaminergic therapeutic strategies for apathy may be important future targets.

Jet-images — deep learning edition

DOE PAGES

de Oliveira, Luke; Kagan, Michael; Mackey, Lester; ...

2016-07-13

Building on the notion of a particle physics detector as a camera and the collimated streams of high energy particles, or jets, it measures as an image, we investigate the potential of machine learning techniques based on deep learning architectures to identify highly boosted W bosons. Modern deep learning algorithms trained on jet images can out-perform standard physically-motivated feature driven approaches to jet tagging. We develop techniques for visualizing how these features are learned by the network and what additional information is used to improve performance. Finally, this interplay between physically-motivated feature driven tools and supervised learning algorithms is generalmore » and can be used to significantly increase the sensitivity to discover new particles and new forces, and gain a deeper understanding of the physics within jets.« less

Jet-images — deep learning edition

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

de Oliveira, Luke; Kagan, Michael; Mackey, Lester

Building on the notion of a particle physics detector as a camera and the collimated streams of high energy particles, or jets, it measures as an image, we investigate the potential of machine learning techniques based on deep learning architectures to identify highly boosted W bosons. Modern deep learning algorithms trained on jet images can out-perform standard physically-motivated feature driven approaches to jet tagging. We develop techniques for visualizing how these features are learned by the network and what additional information is used to improve performance. Finally, this interplay between physically-motivated feature driven tools and supervised learning algorithms is generalmore » and can be used to significantly increase the sensitivity to discover new particles and new forces, and gain a deeper understanding of the physics within jets.« less

Preliminary Evaluation of the Effectiveness of Air Force Advertising.

ERIC Educational Resources Information Center

Vitola, Bart M.

The Airman Enlistment Questionnaire was administered to a sample of non prior service enlistees, 1,667 males and 300 females. Analysis of the responses shows (1)educational opportunity is the strongest motivator for enlisting in the Air Force; (2) there is an indication that Air Force advertising should make different appeals to men and women; and…

Implications of Birth Order for Motivational and Achievement-Related Characteristics of Adults Enrolled in Non-Traditional Instruction

ERIC Educational Resources Information Center

Farley, Frank; And Others

1974-01-01

The present study was designed to investigate the relationship of birth order to achievement motivation and achievement-related variables employing a random sample of students enrolled in the courses offered through the United States Armed Forces Institute (USAFI) in 1970. (Author)

The paradox of moral focus.

PubMed

Young, Liane; Phillips, Jonathan

2011-05-01

When we evaluate moral agents, we consider many factors, including whether the agent acted freely, or under duress or coercion. In turn, moral evaluations have been shown to influence our (non-moral) evaluations of these same factors. For example, when we judge an agent to have acted immorally, we are subsequently more likely to judge the agent to have acted freely, not under force. Here, we investigate the cognitive signatures of this effect in interpersonal situations, in which one agent ("forcer") forces another agent ("forcee") to act either immorally or morally. The structure of this relationship allowed us to ask questions about both the "forcer" and the "forcee." Paradoxically, participants judged that the "forcer" forced the "forcee" to act immorally (i.e. X forced Y), but that the "forcee" was not forced to act immorally (i.e. Y was not forced by X). This pattern obtained only for human agents who acted intentionally. Directly changing participants' focus from one agent to another (forcer versus forcee) also changed the target of moral evaluation and therefore force attributions. The full pattern of judgments may provide a window into motivated moral reasoning and focusing bias more generally; participants may have been motivated to attribute greater force to the immoral forcer and greater freedom to the immoral forcee. Copyright © 2011 Elsevier B.V. All rights reserved.

High-sucrose diets in male rats disrupt aspects of decision making tasks, motivation and spatial memory, but not impulsivity measured by operant delay-discounting.

PubMed

Wong, Alanna; Dogra, Vimi R; Reichelt, Amy C

2017-06-01

Excessive consumption of sugar sweetened drinks is proposed to produce functional changes in the hippocampus and prefrontal cortex, leading to perturbations in behavioural control. Impairments in behavioural control have been observed in obese people on tasks that involve making choices, including delay-discounting, indicative of increased impulsivity. In this study we examined the impact of 2h daily access to 10% sucrose (or no sucrose in controls) in young male rats on behavioural tasks reliant on hippocampal function including delay-discounting, T-maze forced choice alternation and place recognition memory, as well as progressive ratio to measure motivation. We observed deficits in place recognition memory and T-maze forced choice alternation, indicative of hippocampal deficits in rats with a history of sucrose consumption. Moreover, rats with a history of sucrose consumption were less motivated to lever press for rewards on a progressive ratio schedule. However, rats with a history of sucrose consumption performed equally to control animals during the delay-discounting task, suggesting that they discounted for reward size over a delay in a manner comparable to control animals. These findings indicate that high-sucrose diets impact on spatial and working memory processes, but do not induce impulsive-like choice behaviours in rats, suggesting that unhealthy diet choices may not influence this aspect of decision-making behaviour. Copyright © 2017 Elsevier B.V. All rights reserved.

Elastic Molecular Machines and a New Motive Force in Protein Mechanisms,

DTIC Science & Technology

1987-01-01

coupling of the second kind. It is proposed that these new considerations are relevant to mechanisms for the turning on and off of elastic forces in protein mechanisms as varied as those of enzymes and muscle contraction .

Brain hyperthermia and temperature fluctuations during sexual interaction in female rats.

PubMed

Mitchum, Robert D; Kiyatkin, Eugene A

2004-03-12

Since the metabolic activity of neural cells is accompanied by heat release, brain temperature monitoring provides insight into behavior-associated changes in neural activity. In the present study, local temperatures were continuously recorded in several brain structures (nucleus accumbens, medial-preoptic hypothalamus and hippocampus) and a non-locomotor head muscle (musculus temporalis) in a receptive female rat during sexually arousing stimulation and subsequent copulatory behavior with an experienced male. Placement of the male into a neighboring compartment increased the female's temperature (approximately 0.8 degrees C) and additional, transient increases (approximately 0.2 degrees C) occurred when the rats were allowed to see and smell each other through a transparent barrier. Temperatures gradually increased further as the male repeatedly mounted and achieved intromissions, peaked 2-3 min after male's ejaculation (0.2-0.4 degrees C), and abruptly dropped until the male initiated a new copulatory cycle. Similar biphasic fluctuations accompanied subsequent copulatory cycles. Although both arousal-related temperature increases and biphasic fluctuations associated with copulatory cycles were evident in each recording location, brain sites showed consistently faster and stronger increases than the muscle, suggesting metabolic brain activation as the primary source of brain temperature fluctuations and a force behind associated changes in brain temperature. Robust brain hyperthermia and the generally similar pattern of phasic temperature fluctuations associated with individual events of sexual interaction found in males and females suggest widespread neural activation (motivational arousal) as a driving force underlying this cooperative motivated behavior in animals of both sexes. Females, however, showed different temperature changes in association with the initial (first mount or intromission) and final (ejaculation) events of each copulatory cycle, suggesting sex-specific differences in neural activity associated with the initiation and regulation of sexual behavior.

Learning in a virtual environment using haptic systems for movement re-education: can this medium be used for remodeling other behaviors and actions?

PubMed

Merians, Alma S; Fluet, Gerard G; Qiu, Qinyin; Lafond, Ian; Adamovich, Sergei V

2011-03-01

Robotic systems that are interfaced with virtual reality gaming and task simulations are increasingly being developed to provide repetitive intensive practice to promote increased compliance and facilitate better outcomes in rehabilitation post-stroke. A major development in the use of virtual environments (VEs) has been to incorporate tactile information and interaction forces into what was previously an essentially visual experience. Robots of varying complexity are being interfaced with more traditional virtual presentations to provide haptic feedback that enriches the sensory experience and adds physical task parameters. This provides forces that produce biomechanical and neuromuscular interactions with the VE that approximate real-world movement more accurately than visual-only VEs, simulating the weight and force found in upper extremity tasks. The purpose of this article is to present an overview of several systems that are commercially available for ambulation training and for training movement of the upper extremity. We will also report on the system that we have developed (NJIT-RAVR system) that incorporates motivating and challenging haptic feedback effects into VE simulations to facilitate motor recovery of the upper extremity post-stroke. The NJIT-RAVR system trains both the upper arm and the hand. The robotic arm acts as an interface between the participants and the VEs, enabling multiplanar movements against gravity in a three-dimensional workspace. The ultimate question is whether this medium can provide a motivating, challenging, gaming experience with dramatically decreased physical difficulty levels, which would allow for participation by an obese person and facilitate greater adherence to exercise regimes. © 2011 Diabetes Technology Society.

Features of motivation of the crewmembers in an enclosed space at atmospheric pressure changes during breathing inert gases.

NASA Astrophysics Data System (ADS)

Komarevcev, Sergey

Since the 1960s, our psychologists are working on experimenting with small groups in isolation .It was associated with the beginning of spaceflight and necessity to study of human behaviors in ways different from the natural habitat of man .Those, who study human behavior especially in isolation, know- that the behavior in isolation markedly different from that in the natural situations. It associated with the development of new, more adaptive behaviors (1) What are the differences ? First of all , isolation is achieved by the fact ,that the group is in a closed space. How experiments show - the crew members have changed the basic personality traits, such as motivation Statement of the problem and methods. In our experimentation we were interested in changing the features of human motivation (strength, stability and direction of motivation) in terms of a closed group in the modified atmosphere pressure and breathing inert gases. Also, we were interested in particular external and internal motivation of the individual in the circumstances. To conduct experimentation , we used an experimental barocomplex GVK -250 , which placed a group of six mans. A task was to spend fifteen days in isolation on barokomplex when breathing oxigen - xenon mixture of fifteen days in isolation on the same complex when breathing oxygen- helium mixture and fifteen days of isolation on the same complex when breathing normal air All this time, the subjects were isolated under conditions of atmospheric pressure changes , closer to what you normally deal divers. We assumed that breathing inert mixtures can change the strength and stability , and with it , the direction and stability of motivation. To check our results, we planned on using the battery of psychological techniques : 1. Schwartz technique that measures personal values and behavior in society, DORS procedure ( measurement of fatigue , monotony , satiety and stress ) and riffs that give the test once a week. Our assumption is , that personal values , especially in understanding Schwartz, strongly depend on the orientation motivating force for we understand the desire - force under stability - ability to achieve goal, depending on the process of excitation - inhibition in the central nervous system , and under the direct - oriented activity of the individual ( 4). However, in this case , we just needed to see change features of motivation Conclusions : 1. Stress, monotony , fatigue and satiety have not changed throughout the experimentation and remained at a stable average level 2.In the second experimentation the subjects changed the hierarchy of personal values - when breathing helium mixture while pressure - risen strongly indicators such personal values as authoritativeness and the pursuit of that in our opinion indicates change individual self-esteem 3.On the second stage of experimentation (breathing helium mixture ) increased indicators of positive attitude towards life and independence. Svdietelstvovat can increase independence of a melancholic temperament traits , but in vivo positivism and independence are not found together and positivism growth rate can be regarded as an indicator of pharmacologic effects

New constitutionalism and the social reproduction of caring institutions.

PubMed

Gill, Stephen; Bakker, Isabella

2006-01-01

This essay analyzes neo-liberal economic agreements and legal and political frameworks or what has been called the "new constitutionalism," a governance framework that empowers market forces to reshape economic and social development worldwide. The article highlights some consequences of new constitutionalism for caring institutions specifically, and for what feminists call social reproduction more generally: the biological reproduction of the species; the reproduction of labor power; and the reproduction of social institutions and processes associated with the creation and maintenance of communities. New constitutional governance frameworks fundamentally reshape conditions under which the care of human beings takes place. Caring institutions once governed by enabling professions geared to universal care are now determined increasingly by market values and private forces, and driven directly by the profit motive. This is one of the reasons why neo-liberalism is increasingly contested in both the North and the global South.

Forced synchronization of thermoacoustic oscillations in a ducted flame

NASA Astrophysics Data System (ADS)

Guan, Yu; Gupta, Vikrant; Kashinath, Karthik; Li, Larry K. B.

2016-11-01

Forced synchronization is a process in which a self-excited system subjected to external forcing starts to oscillate at the forcing frequency ff in place of its own natural frequency fn. There are two motivations for studying this in thermoacoustics: (i) to determine how external forcing could be used to control thermoacoustic oscillations, which are harmful to many combustors; and (ii) to better understand the nonlinear interactions between self-excited hydrodynamic and thermoacoustic oscillations. In this experimental study, we examine the response of a ducted premixed flame to harmonic acoustic forcing, for two natural states of the system: (1) a state with periodic oscillations at f1 and a marginally stable mode at f2; and (2) a state with quasiperiodic oscillations at two incommensurate frequencies f1 and f2. When forcing the periodic state, we find that the forcing amplitude required for lock-in increases linearly with | ff -f1 | and that the marginally stable mode becomes excited when ff f2 . When forcing the quasiperiodic state, we find that the system locks into the forcing when ff f1 or f2 or 1 / 2 (f1 +f2) . These findings should lead to improved control of periodic and aperiodic thermoacoustic oscillations in combustors. This work was supported by the Research Grants Council of Hong Kong (Project No. 16235716 and 26202815).

An Investigation of Motivation's Role in Postsecondary Vocational Training Programs for At-Risk Learners and Their Entry into the Work Force. Proceedings of the National Symposium on Motivation and Empowerment (St. Paul, Minnesota, May 20, 1987).

ERIC Educational Resources Information Center

Brown, James M., Ed.

This document reports on a national symposium that constituted the first phase of a research study designed to determine how to use intrinsic motivation and self-empowerment concepts to retain special needs learners who are potential dropouts in postsecondary vocational education programs. The first chapter (by Brown and Wotruba) contains the…

Managing healthcare services in the global marketplace.

PubMed

Fried, Bruce J; Harris, Dean M

2007-01-01

The world is getting "flatter"; people, information, technology, and ideas are increasingly crossing national borders. U.S. healthcare is not immune from the forces of globalization. Competition from medical tourism and the rapid growth in the number of undocumented aliens requiring care represent just two challenges healthcare organizations face. An international workforce requires leaders to confront the legal, financial, and ethical implications of using foreign-trained personnel. Cross-border institutional arrangements are emerging, drawing players motivated by social responsibility, globalization of competitors, growth opportunities, or an awareness of vulnerability to the forces of globalization. Forward-thinking healthcare leaders will begin to identify global strategies that address global pressures, explore the opportunities, and take practical steps to prepare for a flatter world.

Motivating Students to Do Homework

NASA Astrophysics Data System (ADS)

Kontur, Frederick J.; Terry, Nathan B.

2014-05-01

How do you motivate students to do their homework? Some instructors make students' homework scores a significant percentage of the final course grade. In that case, how much course credit is required? Some instructors do not grade homework at all, instead relying on students' intrinsic motivation to learn the course material. Will this actually work? Some instructors might motivate students by having quiz and/or exam problems closely match the assigned homework problems. In this article, we report on the effectiveness of grade incentives, homework-based quiz problems, and intrinsic motivation for 16 semesters of introductory mechanics and introductory electricity and magnetism (E&M) courses at the United States Air Force Academy (USAFA) between fall 2008 and spring 2012.

Management of Social Incentives in Air Force Technical Training: A Field Experiment. Final Report.

ERIC Educational Resources Information Center

Hakel, Milton D.; And Others

The report is a study of the utility of social reinforcement for improving Air Force training. It was conducted through a field evaluation of social incentive instructional systems which would serve to improve student motivation, classroom performance, and attitudes. The participants included a total of 300 trainees from two Air Force bases; 25…

Leveraging Human Assets: Interpersonal Skill Development Program

DTIC Science & Technology

2006-11-01

workforce. Washington, DC: American Psychological Association. Vroom , V . (1964). Work and motivation . New York: John Wiley. ...considering the impact of motivation on interpersonal skills. Expectancy theory ( Vroom , 1964) includes expectancy and instrumentality. Expectancy is...important for success in special operations areas such as Civil Affairs (CA) or Special Forces (SF) that work closely with indigenous populations

[THE INFLUENCE OF LEU-ENKEPHALIN AND MEDICAL PLANTS ON MOTOR ACTIVITY OF STOMACH IN DOGS].

PubMed

Vymjatnina, Z K; Prosekina, E Y; Tomova, T A

2015-01-01

The aim of the real research was a study influence of leu-enkephalin and extracts from the leaves of goose-grass large, of burdock of felted and root of chicory on the motor function of stomach for dogs. The study was carried out on 6 outbred dogs-males, by mass 14-17 kg, with the fistula of stomach by Basov. A leu-enkephalin ("Vector", Russia) was entered intravenously in a dose 7 mcg/kg. The corresponding plant-based preparations entered perorally during 10-14 days to beginning of experiments, on an empty stomach, in a volume a no more than 20 ml. Experiments put in a morning clock, in 16-18 hours after eating, after the careful washing of stomach. For 30 mines to the record of motive activity of stomach an animal was enter a peptide or gave a corresponding extract as water or spirit infusion. At the choice of doses of vegetable preparations came from the before obtained data about the antiulcerous action of the used plants. The conduct of peptide rendered considerable stimulant influence on motor activity of stomach, that was expressed in the increase of period of work and increase of force of reductions especially tonic. All used plants preparations rendered modulating influence on motive activity of stomach. Changes consisted in strengthening of tonic and oppressing of phase component. The most considerable decline of amount of phase reductions caused application of extract of goose-grass. Not only an amount but also force of phase reductions diminished thus. An extract from the root of chicory less considerably reduced the arnount of Phase reJuctions, but here substantially increased their force. All used herbal medicines stimulated tonic activity. Thus, peptide and all studied herbal medicines stimulated motion activity of the stomach that could cause acceleration of evacuation of food to duodenum. Such effect should be considered while choosing the medicine for correction of stomach functional activity.

Motivating forces of human actions. Neuroimaging reward and social interaction.

PubMed

Walter, Henrik; Abler, Birgit; Ciaramidaro, Angela; Erk, Susanne

2005-11-15

In neuroeconomics, reward and social interaction are central concepts to understand what motivates human behaviour. Both concepts are investigated in humans using neuroimaging methods. In this paper, we provide an overview about these results and discuss their relevance for economic behaviour. For reward it has been shown that a system exists in humans that is involved in predicting rewards and thus guides behaviour, involving a circuit including the striatum, the orbitofrontal cortex and the amygdala. Recent studies on social interaction revealed a mentalizing system representing the mental states of others. A central part of this system is the medial prefrontal cortex, in particular the anterior paracingulate cortex. The reward as well as the mentalizing system is engaged in economic decision-making. We will discuss implications of this study for neuromarketing as well as general implications of these results that may help to provide deeper insights into the motivating forces of human behaviour.

Worthington Industries, Incorporated, a Case Study in Employee Motivation Via Recognition and Profit Sharing.

DTIC Science & Technology

1983-09-01

productivity and a greater sense of job satisfaction among Department of Defense employees. The Army, Navy, and Air Force were all found to have gain...routine for Worthington Industries, and for the past ten years, its return on shareholders’ equity has averaged 30 percent a year. Cash dividends have also...increased steadily since Worthington Industries’stock went public in 1968, and since 1975, dividend growth has been around 45 percent a year (35

The Dynamic Terrorist Threat: An Assessment of Group Motivations and Capabilities in a Changing World

DTIC Science & Technology

2004-01-01

performed in four programs: Aerospace Force Development; Manpower, Personnel, and Training; Resource Management ; and Strategy and Doctrine. Additional...in- capable group, such as the Palestinian Islamic Jihad (PIJ), would likely be just as challenging if it managed to increase its capabilities to the...2002, p. A1; “The Old West Comes to Israel,” Asia Times, November 16, 2002. 69McGeary (2001, p. 52). 70Jared Kotler , “Guerrillas to Study Curbing the

Driving forces for home-based reablement; a qualitative study of older adults' experiences.

PubMed

Hjelle, Kari Margrete; Tuntland, Hanne; Førland, Oddvar; Alvsvåg, Herdis

2017-09-01

As a result of the ageing population worldwide, there has been a growing international interest in a new intervention termed 'reablement'. Reablement is an early and time-limited home-based intervention with emphasis on intensive, goal-oriented and interdisciplinary rehabilitation for older adults in need of rehabilitation or at risk of functional decline. The aim of this qualitative study was to describe how older adults experienced participation in reablement. Eight older adults participated in semi-structured interviews. A qualitative content analysis was used as the analysis strategy. Four main themes emerged from the participants' experiences of participating in reablement: 'My willpower is needed', 'Being with my stuff and my people', 'The home-trainers are essential', and 'Training is physical exercises, not everyday activities'. The first three themes in particular reflected the participants' driving forces in the reablement process. Driving forces are intrinsic motivation in interaction with extrinsic motivation. Intrinsic motivation was based on the person's willpower and responsibility, and extrinsic motivation was expressed to be strengthened by being in one's home environment with 'own' people, as well as by the co-operation with the reablement team. The reablement team encouraged and supported the older adults to regain confidence in performing everyday activities as well as participating in the society. Our findings have practical significance for politicians, healthcare providers and healthcare professionals by contributing to an understanding of how intrinsic and extrinsic motivation influence reablement. Some persons need apparently more extrinsic motivational support also after the time-limited reablement period is completed. The municipal health and care services need to consider individualised follow-up programmes after the intensive reablement period in order to maintain the achieved skills to perform everyday activities and participate in society. © 2016 The Authors. Health and Social Care in the Community Published by John Wiley & Sons Ltd.

Public spirometry for primary prevention of COPD.

PubMed

Zirlik, Sabine; Wich, Christina; Frieser, Markus; Hildner, Kai; Kleye, Christin; Neurath, Markus F; Fuchs, Florian S

2014-02-01

The most effective action for primary prevention of chronic obstructive lung disease is smoking cessation early enough. In secondary prevention, smokers with airway obstruction were more likely to quit smoking. The aim of this study was to evaluate the impact of a public spirometry on smoking habits in terms of primary prevention. Spirometry with its medical analysis was offered to visitors of a local public event called 'Lange Nacht der Wissenschaften' ('Long night of sciences'). The impact of results on smoking habits was evaluated in all smokers with an anonymized questionnaire afterwards. Two hundred fifty-seven people with the median age of 30 years (interquartile range 22-46) were examined. Out of 44 current smokers (17.1%), only two individuals showed a prebronchodilator FEV1/forced vital capacity-value <0.7. Fourteen smokers stated to have an increased motivation to quit smoking whereas 28 smokers declared that their motivation to quit smoking was independent of spirometry result. These smokers were significantly younger (median age 28 vs. 40 years, P = 0.025) without differences in spirometry results or smoking habits. In an unselected population with a high amount of younger adults, normal spirometry did not show a short-term benefit for primary prevention of chronic obstructive lung disease in terms of increasing motivation to quit smoking. © 2013 John Wiley & Sons, Ltd.

Optical legacy of Imperial College London

NASA Astrophysics Data System (ADS)

Kidger Webb-Moore, Tina E.

2016-10-01

The Industrial Revolution, beginning primarily in the UK, generated an increasing need for highly skilled technical people. Throughout the 19th century, technical instruction increased dramatically and the formation of schools specializing in science and technology grew quickly. In England, there was much motivation in favour of a national prestige center for science and technology centered in London. Central among the motivating forces was Queen Victoria's husband, Prince Albert. Although there were already existing specialist science and technology institutions in major English cities, the growth of superior institutions in other countries within Europe, especially Germany and the Charlottenburg area of Berlin (e.g., the Berlin Technical High School), encouraged important English dignitaries to become more competitive with continental Europe. As a result of this strong continental motivation, several science and technology institutions were built in the south Kensington part of London during the latter half of the 19th century. Imperial College, founded at the start of the 20th century, was a culmination and consolidation of several of these 19th century English institutions. Optical science and technology was an early beneficiary of the founding of Imperial College. This paper will attempt to provide the reader with an understanding of how great was the influence of the optical section of Imperial College in the further development of the world's optical science and technology.

Effect of carbon limitation on photosynthetic electron transport in Nannochloropsis oculata.

PubMed

Zavřel, Tomáš; Szabó, Milán; Tamburic, Bojan; Evenhuis, Christian; Kuzhiumparambil, Unnikrishnan; Literáková, Petra; Larkum, Anthony W D; Raven, John A; Červený, Jan; Ralph, Peter J

2018-04-01

This study describes the impacts of inorganic carbon limitation on the photosynthetic efficiency and operation of photosynthetic electron transport pathways in the biofuel-candidate microalga Nannochloropsis oculata. Using a combination of highly-controlled cultivation setup (photobioreactor), variable chlorophyll a fluorescence and transient spectroscopy methods (electrochromic shift (ECS) and P 700 redox kinetics), we showed that net photosynthesis and effective quantum yield of Photosystem II (PSII) decreased in N. oculata under carbon limitation. This was accompanied by a transient increase in total proton motive force and energy-dependent non-photochemical quenching as well as slightly elevated respiration. On the other hand, under carbon limitation the rapid increase in proton motive force (PMF, estimated from the total ECS signal) was also accompanied by reduced conductivity of ATP synthase to protons (estimated from the rate of ECS decay in dark after actinic illumination). This indicates that the slow operation of ATP synthase results in the transient build-up of PMF, which leads to the activation of fast energy dissipation mechanisms such as energy-dependent non-photochemical quenching. N. oculata also increased content of lipids under carbon limitation, which compensated for reduced NAPDH consumption during decreased CO 2 fixation. The integrated knowledge of the underlying energetic regulation of photosynthetic processes attained with a combination of biophysical methods may be used to identify photo-physiological signatures of the onset of carbon limitation in microalgal cultivation systems, as well as to potentially identify microalgal strains that can better acclimate to carbon limitation. Copyright © 2018 Elsevier B.V. All rights reserved.

Fundamental Experiments at Liquid Helium Temperatures (Low Temperature Studies of Anomalous Surface Shielding and Related Phenomena).

DTIC Science & Technology

1984-09-30

EXPERIMENT BACKGROUND Motivated by the desire to measure for the first time the force of 27 gravity on antimatter , Witteborn and Fairbank (WF...and antimatter . There are, however, no direct experimental tests of the gravitational forces on antimatter . Having measured the force of gravity on...electrons, a measurement using positrons would give the first measurement of the force of gravity on antimatter as well as giving a definitive value for

Race-Conscious Professionalism and African American Representation in Academic Medicine.

PubMed

Powers, Brian W; White, Augustus A; Oriol, Nancy E; Jain, Sachin H

2016-07-01

African Americans remain substantially less likely than other physicians to hold academic appointments. The roots of these disparities stem from different extrinsic and intrinsic forces that guide career development. Efforts to ameliorate African American underrepresentation in academic medicine have traditionally focused on modifying structural and extrinsic barriers through undergraduate and graduate outreach, diversity and inclusion initiatives at medical schools, and faculty development programs. Although essential, these initiatives fail to confront the unique intrinsic forces that shape career development. America's ignoble history of violence, racism, and exclusion exposes African American physicians to distinct personal pressures and motivations that shape professional development and career goals. This article explores these intrinsic pressures with a focus on their historical roots; reviews evidence of their effect on physician development; and considers the implications of these trends for improving African American representation in academic medicine. The paradigm of "race-conscious professionalism" is used to understand the dual obligation encountered by many minority physicians not only to pursue excellence in their field but also to leverage their professional stature to improve the well-being of their communities. Intrinsic motivations introduced by race-conscious professionalism complicate efforts to increase the representation of minorities in academic medicine. For many African American physicians, a desire to have their work focused on the community will be at odds with traditional paths to professional advancement. Specific policy options are discussed that would leverage race-conscious professionalism as a draw to a career in academic medicine, rather than a force that diverts commitment elsewhere.

Self-folding mechanics of graphene tearing and peeling from a substrate

NASA Astrophysics Data System (ADS)

He, Ze-Zhou; Zhu, Yin-Bo; Wu, Heng-An

2018-06-01

Understanding the underlying mechanism in the tearing and peeling processes of graphene is crucial for the further hierarchical design of origami-like folding and kirigami-like cutting of graphene. However, the complex effects among bending moduli, adhesion, interlayer interaction, and local crystal structure during origami-like folding and kirigami-like cutting remain unclear, resulting in challenges to the practical applications of existing theoretical and experimental findings as well as to potential manipulations of graphene in metamaterials and nanodevices. Toward this end, classical molecular dynamics (MD) simulations are performed with synergetic theoretical analysis to explore the tearing and peeling of self-folded graphene from a substrate driven by external force and by thermal activation. It is found that the elastic energy localized at the small folding ridge plays a significant role in the crack trajectory. Due to the extremely small bending modulus of monolayer graphene, its taper angle when pulled by an external force follows a scaling law distinct from that in case of bilayer graphene. With the increase in the initial width of the folding ridge, the self-folded graphene, motivated by thermal fluctuations, can be self-assembled by spontaneous self-tearing and peeling from a substrate. Simultaneously, the scaling law between the taper angle and adhesive energy is independent of the motivations for thermal activation-induced self-assembly and external force tearing, providing effective insights into the underlying physics for graphene-based origami-like folding and kirigami-like cutting.

A Meta-Model Architecture for Fusing Battlefield Information

DTIC Science & Technology

2005-05-01

that a body of force acts as a (possibly loosely) coordinated organization. The totality of actions motivated by force intent define an operational...assume that deception and operational errors represent a minority propotion of the total evidence present on the battlefield based on the principles of

Negative mood-induced alcohol-seeking is greater in young adults who report depression symptoms, drinking to cope, and subjective reactivity.

PubMed

Hogarth, Lee; Hardy, Lorna; Mathew, Amanda R; Hitsman, Brian

2018-04-01

Acute negative mood powerfully motivates alcohol-seeking behavior, but it remains unclear whether sensitivity to this effect is greater in drinkers who report depression symptoms, drinking to cope, and subjective reactivity. To examine these questions, 128 young adult alcohol drinkers (ages 18-25) completed questionnaires of alcohol use disorder symptoms, depression symptoms, and drinking to cope with negative affect. Baseline alcohol choice was measured by preference to enlarge alcohol versus food thumbnail images in two-alternative forced-choice trials. Negative mood was then induced by depressive statements and music, before alcohol choice was tested. Subjective reactivity was indexed by increased sadness pre- to post-mood induction. Baseline alcohol choice correlated with alcohol dependence symptoms (p = .001), and drinking coping motives (ps ≤ .01). Mood induction increased alcohol choice and subjective sadness overall (ps < .001). The mood-induced increase in alcohol choice was associated with depression symptoms (p = .007), drinking to cope (ps ≤ .03), and subjective reactivity (p = .007). The relationship between mood-induced alcohol choice and drinking to cope remained significant after covarying for other drinking motives. Furthermore, the three predictors (depression, drinking to cope, and subjective reactivity) accounted for unique variance in mood-induced alcohol choice (ps ≥ .03), and collectively accounted for 18% of the variance (p < .001). These findings validate the pictorial alcohol choice task as sensitive to the relative value of alcohol and acute negative mood. The findings also accord with the core prediction of negative reinforcement theory that sensitivity to the motivational impact of negative mood on alcohol-seeking behavior may be an important mechanism that links depression and alcohol dependence. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

Negative Mood-Induced Alcohol-Seeking Is Greater in Young Adults Who Report Depression Symptoms, Drinking to Cope, and Subjective Reactivity

PubMed Central

2018-01-01

Acute negative mood powerfully motivates alcohol-seeking behavior, but it remains unclear whether sensitivity to this effect is greater in drinkers who report depression symptoms, drinking to cope, and subjective reactivity. To examine these questions, 128 young adult alcohol drinkers (ages 18–25) completed questionnaires of alcohol use disorder symptoms, depression symptoms, and drinking to cope with negative affect. Baseline alcohol choice was measured by preference to enlarge alcohol versus food thumbnail images in two-alternative forced-choice trials. Negative mood was then induced by depressive statements and music, before alcohol choice was tested. Subjective reactivity was indexed by increased sadness pre- to post-mood induction. Baseline alcohol choice correlated with alcohol dependence symptoms (p = .001), and drinking coping motives (ps ≤ .01). Mood induction increased alcohol choice and subjective sadness overall (ps < .001). The mood-induced increase in alcohol choice was associated with depression symptoms (p = .007), drinking to cope (ps ≤ .03), and subjective reactivity (p = .007). The relationship between mood-induced alcohol choice and drinking to cope remained significant after covarying for other drinking motives. Furthermore, the three predictors (depression, drinking to cope, and subjective reactivity) accounted for unique variance in mood-induced alcohol choice (ps ≥ .03), and collectively accounted for 18% of the variance (p < .001). These findings validate the pictorial alcohol choice task as sensitive to the relative value of alcohol and acute negative mood. The findings also accord with the core prediction of negative reinforcement theory that sensitivity to the motivational impact of negative mood on alcohol-seeking behavior may be an important mechanism that links depression and alcohol dependence. PMID:29389212

Motivating Students to Read with Collaborative Reading Quizzes

ERIC Educational Resources Information Center

Quinn, Timothy; Eckerson, Todd

2010-01-01

One of the most important challenges a teacher faces is motivating his or her students to complete reading assignments and to complete them carefully. After all, if students bring to class a basic understanding of the text up for discussion, much deeper learning can occur than if the teacher is forced to spend time explaining the reading to…

The Situational Leadership Approach Effects on Employee Motivation in Multi-Generational Information Technology Organizations

ERIC Educational Resources Information Center

Irby, Thaddaeus

2011-01-01

This study examines the three generations comprising today's IT organizations to determine whether the Situational Leadership approach is effective in motivating this diverse work force to perform project-related tasks. Baby Boomer employees, Generation X employees, and Generation Y employees are the three generations actively employed in IT…

The Relation between Self-Determination and Retirement Satisfaction among Active Retired Individuals

ERIC Educational Resources Information Center

Stephan, Yannick; Fouquereau, Evelyne; Fernandez, Anne

2008-01-01

Little is known about the motivational forces leading retired individuals to engage in post-retirement activities and how they could be related to satisfaction with retirement. Using the self-determination framework, the purpose of the present exploratory study was to examine the nature of active retirees' motivation and its impact on satisfaction…

Which Love of Country? Tensions, Questions and Contexts for Patriotism and Cosmopolitanism in Education

ERIC Educational Resources Information Center

Schumann, Claudia

2016-01-01

The paper considers Martha Nussbaum's motivation for departing from her earlier cosmopolitan position in favour of now promoting a globally sensitive patriotism. Her reasons for endorsing patriotism will be shown as exemplary for related argumentations by other authors, especially insofar as love of country as a motivating force for civic duty is…

Childbearing motivation and its measurement.

PubMed

Miller, W B

1995-10-01

This paper conceptualises the motive force behind human childbearing as originating in two broad traits which have biological bases, are shaped by experiences during early life and are expressed through their effect on desires and intentions. An instrument for measuring childbearing motivation, the Childbearing Questionnaire (CBQ), is presented. Using a sample of 401 married couples two main scales, nine subscales, and several independent items are described. Evidence for the reliability and validity of this instrument is presented. The versatility of the CBQ as a research instrument and the usefulness of the conceptualisation from which it is derived as a way of integrating social, behavioural, and biological science approaches to childbearing motivation are discussed.

Consumer motivation towards purchasing fruit from integrated production in Belgium.

PubMed

Vannoppen, J; Verbeke, W; Van Huylenbroeck, G

2001-01-01

Consumer concerns about food safety have been steadily growing during the last decade. Along with the recognition of the increasing power from the consumer side of food chains, this has forced agricultural producers to innovate and adapt their production methods. One of those developments is integrated production of pip fruit (IFP). This research analyses and presents motivational structures of consumers towards purchasing IP fruit in Belgium. The research methodology builds on means-end-chain (MEC) theory, with data collected through personal laddering interviews with consumers. A hierarchical value map, indicating motivational structures for farm shop purchase of IP-labelled apples, is presented. IP-apple buyers pursue typical values, with health being paramount. The findings reveal interactions between market channel characteristics and product attributes, including characteristics that refer to production methods. Also, the study shows how outlet choice influences the perception and the motivation structure of the respondents for the specific product, fresh fruit in this case. From the findings, two sets of implications are set forth. First, marketing implications pertaining to advertising through the application of the "Means-End Conceptualization of the Components of Advertising Strategy" or MECCAS model. Second, implications to producers with respect to adapting their production methods to the needs and wants of the present end consumers.

Displaced Pride: Attacking Cynicism at the United States Air Force Academy

DTIC Science & Technology

2009-04-01

or civilian life. I for one am very cynical when it comes to our political leadership...their attempts to solve the current financial crisis...cadet shenanigans might doom your Air Force career with UCMJ action. Fear was the only motivator, unless you held on to your own intrinsic

The Perceived Effectiveness of Mentoring by Company Grade Officers in the United States Air Force

DTIC Science & Technology

2007-03-01

indicated receiving mentoring having reported higher levels of career motivation, self efficacy, and career success compared to non-mentored respondents... career success . Journal of Vocational Behavior, 64, 72-91. Defense Manpower Data Center (2003). 2002 status of the armed forces survey- workplace and

Cross-Cultural Competence: Leader Requirements for Intercultural Effectiveness in the Human Domain

DTIC Science & Technology

2014-06-13

the psychology of dehumanizing enemies, to facilitate warfighter forces being able to more easily kill them in combat. Within this discussion, it...nationalism) within the force, being necessary to motivate service to country and dehumanizing of enemies, against the research that shows it as

Motility of catalytic nanoparticles through self-generated forces.

PubMed

Paxton, Walter F; Sen, Ayusman; Mallouk, Thomas E

2005-11-04

Small-scale synthetic motors capable of generating their own motive forces by exploiting the chemical free energy of their environment represent an important step in developing practical nanomachines. Catalytic particles are capable of generating concentration and other gradients that can be used to self-propel small objects. However, the autonomous movement of catalytic nanoparticles by self-generated forces is a relatively unexplored area in colloid and interfacial chemistry. This paper explores the potential of catalytically self-generated forces for propulsion of small objects through fluids.

The Bacterial Flagellar Type III Export Gate Complex Is a Dual Fuel Engine That Can Use Both H+ and Na+ for Flagellar Protein Export

PubMed Central

Minamino, Tohru; Morimoto, Yusuke V.; Hara, Noritaka; Aldridge, Phillip D.; Namba, Keiichi

2016-01-01

The bacterial flagellar type III export apparatus utilizes ATP and proton motive force (PMF) to transport flagellar proteins to the distal end of the growing flagellar structure for self-assembly. The transmembrane export gate complex is a H+–protein antiporter, of which activity is greatly augmented by an associated cytoplasmic ATPase complex. Here, we report that the export gate complex can use sodium motive force (SMF) in addition to PMF across the cytoplasmic membrane to drive protein export. Protein export was considerably reduced in the absence of the ATPase complex and a pH gradient across the membrane, but Na+ increased it dramatically. Phenamil, a blocker of Na+ translocation, inhibited protein export. Overexpression of FlhA increased the intracellular Na+ concentration in the presence of 100 mM NaCl but not in its absence, suggesting that FlhA acts as a Na+ channel. In wild-type cells, however, neither Na+ nor phenamil affected protein export, indicating that the Na+ channel activity of FlhA is suppressed by the ATPase complex. We propose that the export gate by itself is a dual fuel engine that uses both PMF and SMF for protein export and that the ATPase complex switches this dual fuel engine into a PMF-driven export machinery to become much more robust against environmental changes in external pH and Na+ concentration. PMID:26943926

The Bacterial Flagellar Type III Export Gate Complex Is a Dual Fuel Engine That Can Use Both H+ and Na+ for Flagellar Protein Export.

PubMed

Minamino, Tohru; Morimoto, Yusuke V; Hara, Noritaka; Aldridge, Phillip D; Namba, Keiichi

2016-03-01

The bacterial flagellar type III export apparatus utilizes ATP and proton motive force (PMF) to transport flagellar proteins to the distal end of the growing flagellar structure for self-assembly. The transmembrane export gate complex is a H+-protein antiporter, of which activity is greatly augmented by an associated cytoplasmic ATPase complex. Here, we report that the export gate complex can use sodium motive force (SMF) in addition to PMF across the cytoplasmic membrane to drive protein export. Protein export was considerably reduced in the absence of the ATPase complex and a pH gradient across the membrane, but Na+ increased it dramatically. Phenamil, a blocker of Na+ translocation, inhibited protein export. Overexpression of FlhA increased the intracellular Na+ concentration in the presence of 100 mM NaCl but not in its absence, suggesting that FlhA acts as a Na+ channel. In wild-type cells, however, neither Na+ nor phenamil affected protein export, indicating that the Na+ channel activity of FlhA is suppressed by the ATPase complex. We propose that the export gate by itself is a dual fuel engine that uses both PMF and SMF for protein export and that the ATPase complex switches this dual fuel engine into a PMF-driven export machinery to become much more robust against environmental changes in external pH and Na+ concentration.

Analysis of stochastic model for non-linear volcanic dynamics

NASA Astrophysics Data System (ADS)

Alexandrov, D.; Bashkirtseva, I.; Ryashko, L.

2014-12-01

Motivated by important geophysical applications we consider a dynamic model of the magma-plug system previously derived by Iverson et al. (2006) under the influence of stochastic forcing. Due to strong nonlinearity of the friction force for solid plug along its margins, the initial deterministic system exhibits impulsive oscillations. Two types of dynamic behavior of the system under the influence of the parametric stochastic forcing have been found: random trajectories are scattered on both sides of the deterministic cycle or grouped on its internal side only. It is shown that dispersions are highly inhomogeneous along cycles in the presence of noises. The effects of noise-induced shifts, pressure stabilization and localization of random trajectories have been revealed with increasing the noise intensity. The plug velocity, pressure and displacement are highly dependent of noise intensity as well. These new stochastic phenomena are related with the nonlinear peculiarities of the deterministic phase portrait. It is demonstrated that the repetitive stick-slip motions of the magma-plug system in the case of stochastic forcing can be connected with drumbeat earthquakes.

Permeation profiles of Antibiotics

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

Lopez Bautista, Cesar Augusto; Gnanakaran, Sandrasegaram

Presentation describes motivation: Combating bacterial inherent resistance; Drug development mainly uses brute force rather than rational design; Current experimental approaches lack molecular detail.

Dark Forces at KLOE/KLOE-2

NASA Astrophysics Data System (ADS)

Curciarello, Francesca

2014-05-01

Searches for dark matter particles in the GeV mass range and for dark forces are strongly motivated by the numerous striking astrophysical observations recently reported by many experiments. Flavor factories, like the Frascati Φ-factory DAΦNE, are particularly suited to search for the light gauge vector boson, called U boson, which is thought to mediate an unknown interaction between hypothetical dark matter particles. By using the KLOE detector, limits on U boson coupling factor ɛ2 of the order of 10-5 ÷ 10-7 have been set through the study of the ϕ Dalitz decay, the Higgsstrahlung process and Uγ events. New experiments with the upgraded KLOE detector and the increased luminosity of DAΦNE are expected to improve the already set upper limits by a factor of two or better.

The fifth force: A personal history

NASA Astrophysics Data System (ADS)

Fischbach, Ephraim

2015-12-01

On January 6, 1986, a paper written by our group appeared in Physical Review Letters entitled "Reanalysis of the Eötvös Experiment". In that Letter we reanalyzed a well-known 1922 paper by Eötvös, Pekár, and Fekete (EPF) which compared the accelerations of samples of different composition to the Earth. Our surprising conclusion was that "Although the Eötvös experiment has been universally interpreted as having given null results, we find in fact that this is not the case". Two days later a front page story appeared in the New York Times under the headline "Hints of 5th Force in Universe Challenge Galileo's Findings", and so was born the concept of a "fifth force". In this personal history I review the pre-history which motivated our paper, and discuss details of our reanalysis of the EPF paper that have not been presented previously. Our work led to illuminating correspondence with Robert Dicke and Richard Feynman which are presented here for the first time. I also discuss an interesting meeting with T.D. Lee, one of whose papers with C.N. Yang provided part of the theoretical motivation for our work. Although there is almost no support from the many experiments motivated by the EPF data for a fifth force with properties similar to those that we hypothesized in our original paper, interest in the EPF experiment continues for reasons I outline in the Epilogue.

The Actiotope Model of Giftedness: Its Relationship with Motivation, and the Prediction of Academic Achievement among Turkish Students

ERIC Educational Resources Information Center

Leana-Tascilar, Marilena Z.

2015-01-01

The Actiotope Model of Giftedness (AMG) focuses on person-environment interactions instead of on the personality traits associated with actions. Motivation is a combination of intrinsic and extrinsic forces that are fundamental to the production of actions. Therefore, the resources provided by the environment or person are important for the…

Convention on the Rights of the Child: Background, Motivation, Strategies, Main Themes. Third Edition.

ERIC Educational Resources Information Center

Verhellen, Eugeen

Noting that the adoption and entry into force of the U.N. Convention on the Rights of the Child in 1989 was an important milestone in history reflecting the changing image of the child, this book examines the relationship between education and children's rights. Chapter 1 deals with motivation, the different but interconnected reasons for…

Anticipated Guilt as Behavioral Motivation: An Examination of Appeals to Help Unknown Others through Bone Marrow Donation

ERIC Educational Resources Information Center

Lindsey, Lisa L. Massi

2005-01-01

The current study posits that messages used to elicit behaviors to help unknown others must present substantial perceptions of a threat and efficacy to be successful. Given that many prosocial helping messages depict a threat to unknown others, the current investigation proposed that anticipated guilt is a motivating force behind individuals'…

Inhibition of electron transfer and uncoupling effects by emodin and emodinanthrone in Escherichia coli

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

Ubbink-Kok, T.; Anderson, J.A.; Konings, W.N.

1986-07-01

The anthraquinones emodin (1,3,delta-trihydroxy-6-methylanthraquinone) and emodinanthrone (1,3,8-trihydroxy-6-methylanthrone) inhibited respiration-driven solute transport at micromolar concentrations in membrane vesicles of Escherichia coli. This inhibition was enhanced by Ca ions. The inhibitory action on solute transport is caused by inhibition of electron flow in the respiratory chain, most likely at the level between ubiquinone and cytochrome b, and by dissipation of the proton motive force. The uncoupling action was confirmed by studies on the proton motive force in beef heart cytochrome oxidase proteoliposomes. These two effects on energy transduction in cytoplasmic membranes explain the antibiotic properties of emodin and emodinanthrone.

Inhibition of electron transfer and uncoupling effects by emodin and emodinanthrone in Escherichia coli.

PubMed

Ubbink-Kok, T; Anderson, J A; Konings, W N

1986-07-01

The anthraquinones emodin (1,3,delta-trihydroxy-6-methylanthraquinone) and emodinanthrone (1,3,8-trihydroxy-6-methylanthrone) inhibited respiration-driven solute transport at micromolar concentrations in membrane vesicles of Escherichia coli. This inhibition was enhanced by Ca ions. The inhibitory action on solute transport is caused by inhibition of electron flow in the respiratory chain, most likely at the level between ubiquinone and cytochrome b, and by dissipation of the proton motive force. The uncoupling action was confirmed by studies on the proton motive force in beef heart cytochrome oxidase proteoliposomes. These two effects on energy transduction in cytoplasmic membranes explain the antibiotic properties of emodin and emodinanthrone.

Choosing Fighting Competitors Among Men: Testosterone, Personality, and Motivations.

PubMed

Borráz-León, Javier I; Cerda-Molina, Ana Lilia; Rantala, Markus J; Mayagoitia-Novales, Lilian

2018-01-01

Higher testosterone levels have been positively related to a variety of social behaviors and personality traits associated with intrasexual competition. The aim of this study was to evaluate the role of testosterone levels and personality traits such as aggressiveness, competitiveness, and self-esteem on the task of choosing a fighting competitor (a rival) with or without a motivation to fight. In Study 1, a group of 119 men participated in a task for choosing a rival through pictures of men with high-dominant masculinity versus low-dominant masculinity. Participants completed three personality questionnaires and donated two saliva samples (pre-test and post-test sample) to quantify their testosterone levels. We found that the probability of choosing high-dominant masculine men as rivals increased with higher aggressiveness scores. In Study 2, the task of choosing rivals was accompanied by motivations to fight (pictures of women with high or low waist-to-hip ratio [WHR]). In this context, we observed that the probability of choosing dominant masculine men as rivals depended on the WHR of the women. Overall, average levels of post-test testosterone, aggressiveness, and high self-esteem increased the probability to fight for women with low WHR independently of the dominance masculinity of the rivals. Our results indicate that human decisions, in the context of intrasexual competition and mate choice, are regulated by physiological and psychological mechanisms allowing men to increase their biological fitness. We discuss our results in the light of the plasticity of human behavior according to biological and environmental forces.

What makes coaches tick? The impact of coaches' intrinsic and extrinsic motives on their own satisfaction and that of their athletes.

PubMed

Jowett, S

2008-10-01

This study aims to investigate the influence of two types of motivational forces on coach and athlete satisfaction. The focus is on intrinsic and extrinsic motives that initiate coach-related behavior. A questionnaire that measures both types of motivation and three facets of satisfaction (i.e., satisfaction with performance, with instruction, and with the coach-athlete relationship) was completed by 138 coaches. One athlete from each of the coaches who participated in the study was also asked to complete a questionnaire that measures their satisfaction with performance, instruction, and the coach-athlete relationship. Results from a series of regression analyses indicated that while intrinsic motivation was moderately and positively related to all facets of coach satisfaction, extrinsic motivation was only related to coach satisfaction with the coach-athlete relationship. Athletes' satisfaction with the coach-athlete relationship was only associated with the coach's intrinsic motivation. Interaction effects among the two types of motivation were significant suggesting that extrinsic motivation can potentially undermine intrinsic motivation when intrinsic motivation is low. The findings are discussed based on assumptions put forward by self-determination theory.

Speed of the bacterial flagellar motor near zero load depends on the number of stator units.

PubMed

Nord, Ashley L; Sowa, Yoshiyuki; Steel, Bradley C; Lo, Chien-Jung; Berry, Richard M

2017-10-31

The bacterial flagellar motor (BFM) rotates hundreds of times per second to propel bacteria driven by an electrochemical ion gradient. The motor consists of a rotor 50 nm in diameter surrounded by up to 11 ion-conducting stator units, which exchange between motors and a membrane-bound pool. Measurements of the torque-speed relationship guide the development of models of the motor mechanism. In contrast to previous reports that speed near zero torque is independent of the number of stator units, we observe multiple speeds that we attribute to different numbers of units near zero torque in both Na + - and H + -driven motors. We measure the full torque-speed relationship of one and two H + units in Escherichia coli by selecting the number of H + units and controlling the number of Na + units in hybrid motors. These experiments confirm that speed near zero torque in H + -driven motors increases with the stator number. We also measured 75 torque-speed curves for Na + -driven chimeric motors at different ion-motive force and stator number. Torque and speed were proportional to ion-motive force and number of stator units at all loads, allowing all 77 measured torque-speed curves to be collapsed onto a single curve by simple rescaling. Published under the PNAS license.

Speed of the bacterial flagellar motor near zero load depends on the number of stator units

PubMed Central

Nord, Ashley L.; Sowa, Yoshiyuki; Steel, Bradley C.; Lo, Chien-Jung; Berry, Richard M.

2017-01-01

The bacterial flagellar motor (BFM) rotates hundreds of times per second to propel bacteria driven by an electrochemical ion gradient. The motor consists of a rotor 50 nm in diameter surrounded by up to 11 ion-conducting stator units, which exchange between motors and a membrane-bound pool. Measurements of the torque–speed relationship guide the development of models of the motor mechanism. In contrast to previous reports that speed near zero torque is independent of the number of stator units, we observe multiple speeds that we attribute to different numbers of units near zero torque in both Na+- and H+-driven motors. We measure the full torque–speed relationship of one and two H+ units in Escherichia coli by selecting the number of H+ units and controlling the number of Na+ units in hybrid motors. These experiments confirm that speed near zero torque in H+-driven motors increases with the stator number. We also measured 75 torque–speed curves for Na+-driven chimeric motors at different ion-motive force and stator number. Torque and speed were proportional to ion-motive force and number of stator units at all loads, allowing all 77 measured torque–speed curves to be collapsed onto a single curve by simple rescaling. PMID:29078322

Using Television Technology to Teach Technical Writing.

ERIC Educational Resources Information Center

Wallisch, Bill

Technical writing teachers at the U.S. Air Force Academy enhance student motivation by bringing real Air Force writing situations into the classroom through short videotapes which allow students to see how scientists and engineers cope with report writing in their daily work. Also, a special English honors course, which is part of the "Blue…

Air Force Commanders and Barriers to Entry into a Doctoral Business Program

ERIC Educational Resources Information Center

Williams, Tony; LeMire, Steven D.

2011-01-01

The authors examined professionally qualified Air Force commanders' barriers to entry into a business doctoral degree program related to the factors of time, financial means, academics, and motivation. Of the 116 present commanders, 63% were interested in pursuing a doctorate in business. For the commanders interested in obtaining a doctorate…

The Dynamic Force Table

ERIC Educational Resources Information Center

Geddes, John B.; Black, Kelly

2008-01-01

We examine an experimental apparatus that is used to motivate the connections between the basic properties of vectors, potential functions, systems of nonlinear equations, and Newton's method for nonlinear systems of equations. The apparatus is an adaptation of a force table where we remove the center-pin and allow the center-ring to move freely.…

Study on Extremizing Adaptive Systems and Applications to Synthetic Aperture Radars.

DTIC Science & Technology

1983-05-01

Air Force Office of Scientific Research/NL Bolling Air Force Base. DC 20332 ’,, , ..... -.. .. -.. -.. .. . . - . - - -. .. jjTVI E ()y T1-.’! Nt1 AL...This project was motivated by A. H. Klopf’s insightful observation and proposition on the functioning of the neuron cell and the nervous system in

Parallels in Conflict: The American Revolution and the Vietnam War

DTIC Science & Technology

1986-05-01

in World War * 14 II. American forces were psychologically ill-prepared to fight a jungle war against highly motivated, indigenous Communist forces... atar - : a by/ necessity a realistic consequLence cf that ob 1,ecz~e The- ’::nm- tainment" objective spawned a political polt- wh-c :ra’-e dilemma

Inherent characteristics of sawtooth cycles can explain different glacial periodicities

NASA Astrophysics Data System (ADS)

Omta, Anne Willem; Kooi, Bob W.; van Voorn, George A. K.; Rickaby, Rosalind E. M.; Follows, Michael J.

2016-01-01

At the Mid-Pleistocene Transition about 1 Ma, the dominant periodicity of the glacial-interglacial cycles shifted from 40 to 100 kyr. Here, we use a previously developed mathematical model to investigate the possible dynamical origin of these different periodicities. The model has two variables, one of which exhibits sawtooth oscillations, resembling the glacial-interglacial cycles, whereas the other variable exhibits spikes at the rapid transitions. When applying a sinusoidal forcing with a fixed period, there emerges a rich variety of cycles with different periodicities, each being a multiple of the forcing period. Furthermore, the dominant periodicity of the system can change, while the forcing periodicity remains fixed, due to either random variations or different frequency components of the orbital forcing. Two key relationships stand out as predictions to be tested against observations: (1) the amplitude and the periodicity of the cycles are approximately linearly proportional to each other, a relationship that is also found in the δ ^{18}O temperature proxy. (2) The magnitude of the spikes increases with increasing periodicity and amplitude of the sawtooth. This prediction could be used to identify one or more currently hidden spiking variables driving the glacial-interglacial transitions. Essentially, the quest would be for any proxy record, concurrent with a dynamical model prediction, that exhibits deglacial spikes which increase at times when the amplitude/periodicity of the glacial cycles increases. In the specific context of our calcifier-alkalinity mechanism, the records of interest would be calcifier productivity and calcite accumulation. We believe that such a falsifiable hypothesis should provide a strong motivation for the collection of further records.

High friction on ice provided by elastomeric fiber composites with textured surfaces

NASA Astrophysics Data System (ADS)

Rizvi, R.; Naguib, H.; Fernie, G.; Dutta, T.

2015-03-01

Two main applications requiring high friction on ice are automobile tires and footwear. The main motivation behind the use of soft rubbers in these applications is the relatively high friction force generated between a smooth rubber contacting smooth ice. Unfortunately, the friction force between rubber and ice is very low at temperatures near the melting point of ice and as a result we still experience automobile accidents and pedestrian slips and falls in the winter. Here, we report on a class of compliant fiber-composite materials with textured surfaces that provide outstanding coefficients of friction on wet ice. The fibrous composites consist of a hard glass-fiber phase reinforcing a compliant thermoplastic polyurethane matrix. The glass-fiber phase is textured such that it is aligned transversally and protruding out of the elastomer surface. Our analysis indicates that the exposed fiber phase exhibits a "micro-cleat" effect, allowing for it to fracture the ice and increase the interfacial contact area thereby requiring a high force to shear the interface.

Short-Term Retrospective Land Data Assimilation Schemes

NASA Technical Reports Server (NTRS)

Houser, P. R.; Cosgrove, B. A.; Entin, J. K.; Lettenmaier, D.; ODonnell, G.; Mitchell, K.; Marshall, C.; Lohmann, D.; Schaake, J. C.; Duan, Q.;

Future discharge drought across climate regions around the world modelled with a synthetic hydrological modelling approach forced by three general circulation models

NASA Astrophysics Data System (ADS)

Wanders, N.; Van Lanen, H. A. J.

2015-03-01

Hydrological drought characteristics (drought in groundwater and streamflow) likely will change in the 21st century as a result of climate change. The magnitude and directionality of these changes and their dependency on climatology and catchment characteristics, however, is uncertain. In this study a conceptual hydrological model was forced by downscaled and bias-corrected outcome from three general circulation models for the SRES A2 emission scenario (GCM forced models), and the WATCH Forcing Data set (reference model). The threshold level method was applied to investigate drought occurrence, duration and severity. Results for the control period (1971-2000) show that the drought characteristics of each GCM forced model reasonably agree with the reference model for most of the climate types, suggesting that the climate models' results after post-processing produce realistic outcomes for global drought analyses. For the near future (2021-2050) and far future (2071-2100) the GCM forced models show a decrease in drought occurrence for all major climates around the world and increase of both average drought duration and deficit volume of the remaining drought events. The largest decrease in hydrological drought occurrence is expected in cold (D) climates where global warming results in a decreased length of the snow season and an increased precipitation. In the dry (B) climates the smallest decrease in drought occurrence is expected to occur, which probably will lead to even more severe water scarcity. However, in the extreme climate regions (desert and polar), the drought analysis for the control period showed that projections of hydrological drought characteristics are most uncertain. On a global scale the increase in hydrological drought duration and severity in multiple regions will lead to a higher impact of drought events, which should motivate water resource managers to timely anticipate the increased risk of more severe drought in groundwater and streamflow and to design pro-active measures.

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

Bates, T.R. Jr.; Tait, S.; Mumford, G.

The authors discuss how improvements that can increase rig safety can be made in equipment, regulations, and stabilized personnel levels. With regard to equipment, exposure to material handling must be reduced through automation, and well-control technology must be improved by enhanced use of computers and better systems to handle gas. According to this analysis, regulations are needed that are global in scope and have had their costs-to-benefits fully and fairly assessed. Self regulation must be used effectively throughout the industry. Job security and wages should be made adequate to maintain an experienced, motivated, and safe work force.

Employee commitment and motivation: a conceptual analysis and integrative model.

PubMed

Myer, John P; Becker, Thomas E; Vandenberghe, Christian

2004-12-01

Theorists and researchers interested in employee commitment and motivation have not made optimal use of each other's work. Commitment researchers seldom address the motivational processes through which commitment affects behavior, and motivation researchers have not recognized important distinctions in the forms, foci, and bases of commitment. To encourage greater cross-fertilization, the authors present an integrative framework in which commitment is presented as one of several energizing forces for motivated behavior. E. A. Locke's (1997) model of the work motivation process and J. P. Meyer and L. Herscovitch's (2001) model of workplace commitments serve as the foundation for the development of this new framework. To facilitate the merger, a new concept, goal regulation, is derived from self-determination theory (E. L. Deci & R. M. Ryan, 1985) and regulatory focus theory (E. I. Higgins, 1997). By including goal regulation, it is acknowledged that motivated behavior can be accompanied by different mindsets that have particularly important implications for the explanation and prediction of discretionary work behavior. 2004 APA, all rights reserved

Effects of Specific Vs. Nonspecific and Absolute Vs. Comparative Feedback on Performance and Satisfaction. Final Report for Period 1 July 1975-30 September 1976.

ERIC Educational Resources Information Center

Pritchard, Robert D.; Montagno, Ray V.

In a study focusing on intrinsic motivation as a possible approach to improving the motivation and productivity of Air Force personnel, a factors list was generated from a literature review and intuitive analysis. Performance feedback was selected for further study. Fourteen feedback dimensions were identified and defined; and a number of…

Development of an Analysis Method to Identify the Root Causes of Finding from the Air Force Environmental Compliance Assessment and Management Program (ECAMP)

DTIC Science & Technology

1994-09-01

Theories and Applications ..................... 17 Theories of Motivation ........................... 18 Maslow’s Hierarchy of Needs...18 Herzberg’s Motivation-Hygiene Theory ............. 19 Instrinsic vs Extrinsic Assumptions ................... 22 McGregor’s Theory X and Theory ...Y Assumptions ...... ... 22 Vroom’s Expectancy Theory ..................... 24 Applications ........ .......................... 25 Tell People What

On the effect of gyroscopic forces on the instability of certain fluid-elastic systems. Part 1: Definitions

NASA Astrophysics Data System (ADS)

Kornecki, A.

1983-09-01

This study was motivated by work on the stability of nonconservative elastic systems and flutter of certain fluid-elastic systems. A literature review revealed that the concepts of conservative forces (and systems) and gyroscopic forces (and systems) need clarifications, and the definitions formulated by different authors for the forces and systems are sometimes conflicting. In this report, these controversies are thoroughly discussed and conservative and gyroscopic systems are redefined within the framework of the classical dynamics of a system of particles.

Magneto-motive detection of tissue-based macrophages by differential phase optical coherence tomography.

PubMed

Oh, Junghwan; Feldman, Marc D; Kim, Jihoon; Kang, Hyun Wook; Sanghi, Pramod; Milner, Thomas E

2007-03-01

A novel method to detect tissue-based macrophages using a combination of superparamagnetic iron oxide (SPIO) nanoparticles and differential phase optical coherence tomography (DP-OCT) with an external oscillating magnetic field is reported. Magnetic force acting on iron-laden tissue-based macrophages was varied by applying a sinusoidal current to a solenoid containing a conical iron core that substantially focused and increased magnetic flux density. Nanoparticle motion was detected with DP-OCT, which can detect tissue movement with nanometer resolution. Frequency response of iron-laden tissue movement was twice the modulation frequency since the magnetic force is proportional to the product of magnetic flux density and gradient. Results of our experiments indicate that DP-OCT can be used to identify tissue-based macrophage when excited by an external focused oscillating magnetic field. (c) 2007 Wiley-Liss, Inc

Sources of motivation for abstinence: a replication analysis of the reasons for quitting questionnaire.

PubMed

Downey, L; Rosengren, D B; Donovan, D M

2001-01-01

The Reasons for Quitting Questionnaire (RFQ) as modified by McBride and colleagues (C. M. McBride et al., 1994) for use with substance users other than tobacco smokers, was administered to individuals approved for public-sector addiction treatment. Four motivation dimensions, similar to those found by McBride et al., were identified: self-concept issues, health concerns, legal issues, and social influence. A forced two-component solution yielded dimensions interpretable as intrinsic and extrinsic motivation. Self-concept issues provided the highest levels of motivation for abstinence in this sample, with moderate levels provided by health concerns, and the lowest levels provided by legal and social influence components. Intrinsic motivation was higher than extrinsic motivation. Logistic regression models, with adjustment for total motivation, tested the association of successful abstinence during a follow-up period with baseline extrinsic and intrinsic motivation, and with the difference between intrinsic and extrinsic levels. All three associations were significant: intrinsic motivation (positive association), extrinsic motivation (negative association), and the difference score (positive association). The results suggest the usefulness of the 20-item modified RFQ in evaluating motivation for abstinence among treatment seekers exhibiting severe negative consequences of addiction. Testing with samples varying in severity of addiction consequences is recommended.

Promotion and Prevention Focused Feeding Strategies: Exploring the Effects on Healthy and Unhealthy Child Eating.

PubMed

Melbye, Elisabeth L; Hansen, Håvard

2015-01-01

There is a general lack of research addressing the motivations behind parental use of various feeding practices. Therefore, the present work aims to extend the current literature on parent-child feeding interactions by integrating the traditional developmental psychological perspective on feeding practices with elements of Regulatory Focus Theory (RFT) derived from the field of motivational psychology. In this paper, we seek to explain associations between parental feeding practices and child (un)healthy eating behaviors by categorizing parental feeding practices into promotion and prevention focused strategies, thus exploring parent-child feeding interactions within the framework of RFT. Our analyses partly supported the idea that (1) child healthy eating is positively associated with feeding practices characterized as promotion focused, and (2) child unhealthy eating is negatively associated with feeding practices characterized as prevention focused. However, a general observation following from our results suggests that parents' major driving forces behind reducing children's consumption of unhealthy food items and increasing their consumption of healthy food items are strategies that motivate rather than restrict. In particular, parents' provision of a healthy home food environment seems to be essential for child eating.

Promotion and Prevention Focused Feeding Strategies: Exploring the Effects on Healthy and Unhealthy Child Eating

PubMed Central

Melbye, Elisabeth L.; Hansen, Håvard

2015-01-01

There is a general lack of research addressing the motivations behind parental use of various feeding practices. Therefore, the present work aims to extend the current literature on parent-child feeding interactions by integrating the traditional developmental psychological perspective on feeding practices with elements of Regulatory Focus Theory (RFT) derived from the field of motivational psychology. In this paper, we seek to explain associations between parental feeding practices and child (un)healthy eating behaviors by categorizing parental feeding practices into promotion and prevention focused strategies, thus exploring parent-child feeding interactions within the framework of RFT. Our analyses partly supported the idea that (1) child healthy eating is positively associated with feeding practices characterized as promotion focused, and (2) child unhealthy eating is negatively associated with feeding practices characterized as prevention focused. However, a general observation following from our results suggests that parents' major driving forces behind reducing children's consumption of unhealthy food items and increasing their consumption of healthy food items are strategies that motivate rather than restrict. In particular, parents' provision of a healthy home food environment seems to be essential for child eating. PMID:26380269

Bilateral upper limb trainer with virtual reality for post-stroke rehabilitation: case series report.

PubMed

Sampson, Michael; Shau, Yio-Wha; King, Marcus James

2012-01-01

Stroke is a leading cause of disability with many survivors having upper limb (UL) hemiparesis. UL rehabilitation using bilateral exercise enhances outcomes and the Bilateral Upper Limb Trainer (BUiLT) was developed to provide symmetrical, bilateral arm exercise in a 'forced' and self-assistive manner, incorporating virtual reality (VR) to provide direction and task specificity to users as well as action observation-execution and greater motivation to exercise. The BUiLT + VR system was trialled on five post-stroke participants with UL hemiparesis: one sub-acute and four chronic. The intervention was supplied for 45 min, 4 days/week for 6 weeks. The Fugl-Meyer Upper Extremity score (FMA-UE) was used as the primary outcome measure. Secondary outcome measures used were UL isometric strength and the Intrinsic Motivation Inventory (IMI) questionnaire. The BUiLT + VR therapy increased FMA-UE scores from 1 to 5 and overall strength in the shoulder and elbow. Motivation at the end of intervention was positive. Therapy using the BUiLT + VR system is reliable, can be administered safely and has a positive trend of benefit as measured by the FMA-UE, isometric strength testing and IMI questionnaire.

Inflation of USAF Officer Performance Reports: Analyzing the Organizational Environment

DTIC Science & Technology

2009-12-01

satisfying Maslow’s hierarchy of needs (physiological, safety, belongingness and love, esteem, and self- actualization [Lawler, 1973]). 18 1. Intrinsic...Rewards/Motivation Extrinsic rewards are those rewards that are tangible outcomes given to an employee . Extrinsic motivation comes from “behaviors in...evaluators are forced to rate employees in fixed “bins” such as “below average,” “average,” or “excellent”  Ranking: evaluator must rank

Motivational and Productivity Factors that Influence the Naval Construction Force

DTIC Science & Technology

1990-08-01

rework, unavailability of tools and equipment, disrespectful treatment, lack of recognition, little participation in decision-making, M 0 T I V A M(l...can be used by management as a motivating tool for workers. Herzberg recommends the following guidelines to for an effective job enrichment program...misconception is to focus solely on labor. One must consider all resources available within the work environment, including tools , equipment, materials

The effectiveness of constructivist science instructional methods on middle school students' student achievement and motivation

NASA Astrophysics Data System (ADS)

Brooks, John

A problem facing science educators is determining the most effective means of science instruction so that students will meet or exceed the new rigorous standards. The theoretical framework for this study was based on reform and research efforts that have informed science teachers that using constructivism is the best method of science instruction. The purpose of this study was to investigate how the constructivist method of science instruction affected student achievement and student motivation in a sixth grade science classroom. The guiding research question involved understanding which method of science instruction would be most effective at improving student achievement in science. Other sub-questions included the factors that contribute to student motivation in science and the method of science instruction students receive that affects motivation to learn science. Quantitative data were collected using a pre-test and post-test single group design. T-test and ANCOVA were used to test quantitative hypotheses. Qualitative data were collected using student reflective journals and classroom discussions. Students' perspectives were transcribed, coded and used to further inform quantitative findings. The findings of this study supported the recommendations made by science reformists that the best method of science instruction was a constructivist method. This study also found that participant comments favored constructivist taught classes. The implications for social change at the local level included potential increases in student achievement in science and possibly increased understanding that can facilitate similar changes at other schools. From a global perspective, constructivist-oriented methods might result in students becoming more interested in majoring in science at the college level and in becoming part of a scientifically literate work force.

The relation between self-determination and retirement satisfaction among active retired individuals.

PubMed

Stephan, Yannick; Fouquereau, Evelyne; Fernandez, Anne

2008-01-01

Little is known about the motivational forces leading retired individuals to engage in post-retirement activities and how they could be related to satisfaction with retirement. Using the self-determination framework, the purpose of the present exploratory study was to examine the nature of active retirees' motivation and its impact on satisfaction with life in retirement. The Global Motivation Scale and measures of satisfaction with retirement were administered to 150 active retired individuals engaged in organized post-retirement activities in a University-based organization. Results revealed that these individuals were mainly characterized by higher levels of intrinsic motivation for knowledge, stimulation and accomplishment, rather than extrinsic dimensions. Regression analysis further demonstrated that intrinsic motivation for both accomplishment and stimulation were positively related to satisfaction with retirement, over and above the significant contribution of time since retirement, anticipated satisfaction with retirement, and subjective health. This exploratory study highlights the motivational mechanisms through which post-retirement behaviors could positively influence satisfaction with life in retirement among active retirees.

Changing me to keep you: state jealousy promotes perceiving similarity between the self and a romantic rival.

PubMed

Slotter, Erica B; Lucas, Gale M; Jakubiak, Brittany; Lasslett, Heather

2013-10-01

Individuals sometimes alter their self-views to be more similar to others--traditionally romantic partners--because they are motivated to do so. A common motivating force is the desire to affiliate with a partner. The current research examined whether a different motivation--romantic jealousy--might promote individuals to alter their self-views to be more similar to a romantic rival, rather than a partner. Romantic jealousy occurs when individuals perceive a rival as a threat to their relationship and motivates individuals to defend their relationship. We proposed that one novel way that individuals might defend their relationship is by seeing themselves as more similar to a perceived romantic rival. We predicted individuals would alter their self-views to be more similar to a rival that they believed their partner found attractive. Importantly, we predicted that state romantic jealousy would motivate these self-alterations. Three studies confirmed these hypotheses.

Models of misbelief: Integrating motivational and deficit theories of delusions.

PubMed

McKay, Ryan; Langdon, Robyn; Coltheart, Max

2007-12-01

The impact of our desires and preferences upon our ordinary, everyday beliefs is well-documented [Gilovich, T. (1991). How we know what isn't so: The fallibility of human reason in everyday life. New York: The Free Press.]. The influence of such motivational factors on delusions, which are instances of pathological misbelief, has tended however to be neglected by certain prevailing models of delusion formation and maintenance. This paper explores a distinction between two general classes of theoretical explanation for delusions; the motivational and the deficit. Motivational approaches view delusions as extreme instances of self-deception; as defensive attempts to relieve pain and distress. Deficit approaches, in contrast, view delusions as the consequence of defects in the normal functioning of belief mechanisms, underpinned by neuroanatomical or neurophysiological abnormalities. It is argued that although there are good reasons to be sceptical of motivational theories (particularly in their more floridly psychodynamic manifestations), recent experiments confirm that motives are important causal forces where delusions are concerned. It is therefore concluded that the most comprehensive account of delusions will involve a theoretical unification of both motivational and deficit approaches.

The mnemonic mover: nostalgia regulates avoidance and approach motivation.

PubMed

Stephan, Elena; Wildschut, Tim; Sedikides, Constantine; Zhou, Xinyue; He, Wuming; Routledge, Clay; Cheung, Wing-Yee; Vingerhoets, Ad J J M

2014-06-01

In light of its role in maintaining psychological equanimity, we proposed that nostalgia--a self-relevant, social, and predominantly positive emotion--regulates avoidance and approach motivation. We advanced a model in which (a) avoidance motivation triggers nostalgia and (b) nostalgia, in turn, increases approach motivation. As a result, nostalgia counteracts the negative impact of avoidance motivation on approach motivation. Five methodologically diverse studies supported this regulatory model. Study 1 used a cross-sectional design and showed that avoidance motivation was positively associated with nostalgia. Nostalgia, in turn, was positively associated with approach motivation. In Study 2, an experimental induction of avoidance motivation increased nostalgia. Nostalgia then predicted increased approach motivation. Studies 3-5 tested the causal effect of nostalgia on approach motivation and behavior. These studies demonstrated that experimental nostalgia inductions strengthened approach motivation (Study 3) and approach behavior as manifested in reduced seating distance (Study 4) and increased helping (Study 5). The findings shed light on nostalgia's role in regulating the human motivation system.

Using Center of Gravity Analysis to Defeat Violent Extremist Organizations

DTIC Science & Technology

2016-04-04

ideologically motivated violence to further political goals.”8 Joint Publication 3-26 describes terrorism as, “the unlawful use of violence or...threat of violence , often motivated by religious, political or other ideological beliefs, to instill fear and coerce governments or societies in pursuit...of goals that are usually politicized.”9 The Federal Bureau of Investigation (FBI) defines terrorism as “the unlawful use of force or violence

Defeat: A Motivation for Organizational Change?

DTIC Science & Technology

2007-03-28

GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) Scott Carlson 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER 7. PERFORMING...DEFEAT: A MOTIVATION FOR ORGANIZATIONAL CHANGE? The era of procrastinating , of half-measures, of soothing and baffling expedients, of delays, is...point has not worked in Iraq, as U.S. and coalition forces remain bogged down in what appears to be a long, protracted war that is making no apparent

Peptide Probes Reveal a Hydrophobic Steric Ratchet in the Anthrax Toxin Protective Antigen Translocase.

PubMed

Colby, Jennifer M; Krantz, Bryan A

2015-11-06

Anthrax toxin is a tripartite virulence factor produced by Bacillus anthracis during infection. Under acidic endosomal pH conditions, the toxin's protective antigen (PA) component forms a transmembrane channel in host cells. The PA channel then translocates its two enzyme components, lethal factor and edema factor, into the host cytosol under the proton motive force. Protein translocation under a proton motive force is catalyzed by a series of nonspecific polypeptide binding sites, called clamps. A 10-residue guest/host peptide model system, KKKKKXXSXX, was used to functionally probe polypeptide-clamp interactions within wild-type PA channels. The guest residues were Thr, Ala, Leu, Phe, Tyr, and Trp. In steady-state translocation experiments, the channel blocked most tightly with peptides that had increasing amounts of nonpolar surface area. Cooperative peptide binding was observed in the Trp-containing peptide sequence but not the other tested sequences. Trp substitutions into a flexible, uncharged linker between the lethal factor amino-terminal domain and diphtheria toxin A chain expedited translocation. Therefore, peptide-clamp sites in translocase channels can sense large steric features (like tryptophan) in peptides, and while these steric interactions may make a peptide translocate poorly, in the context of folded domains, they can make the protein translocate more rapidly presumably via a hydrophobic steric ratchet mechanism. Copyright © 2015 The Authors. Published by Elsevier Ltd.. All rights reserved.

Electrochemical methods for generation of a biological proton motive force

DOEpatents

Zeikus, Joseph Gregory [Okemos, MI; Shin, Hyoun S [Lansing, MI; Jain, Mahendra K [Lexington, KY

2008-12-02

Disclosed are methods using neutral red to mediate the interconversion of chemical and electrical energy. Electrically reduced neutral red has been found to promote cell growth and formation of reduced products by reversibly increasing the ratio of the reduced:oxidized forms of NAD(H) or NADP(H). Electrically reduced neutral red is able to serve as the sole source of reducing power for microbial cell growth. Neutral red is also able to promote conversion of chemical energy to electrical energy by facilitating the transfer of electrons from microbial reducing power to a fuel cell cathode.

Electrochemical methods for generation of a biological proton motive force and pyridine nucleotide cofactor regeneration

DOEpatents

Zeikus, Gregory J.; Shin, Hyoun S.; Jain, Mahendra K.

2002-01-01

Disclosed are methods using neutral red to mediate the interconversion of chemical and electrical energy. Electrically reduced neutral red has been found to promote cell growth and formation of reduced products by reversibly increasing the ratio of the reduced:oxidized forms of NAD(H) or NADP(H). Electrically reduced neutral red is able to serve as the sole source of reducing power for microbial, cell growth. Neutral red is also able to promote conversion of chemical energy to electrical energy by facilitating the transfer of electrons from microbial reducing power to a fuel cell cathode.

Electrochemical methods for generation of a biological proton motive force and pyridine nucleotide cofactor regeneration

DOEpatents

Zeikus, Joseph G.; Park, Doo

2001-01-01

Disclosed are methods using neutral red to mediate the interconversion of chemical and electrical energy. Electrically reduced neutral red has been found to promote cell growth and formation of reduced products by reversibly increasing the ratio of the reduced:oxidized forms of NAD(H) or NADP(H). Electrically reduced neutral red is able to serve as the sole source of reducing power for microbial cell growth. Neutral red is also able to promote conversion of chemical energy to electrical energy by facilitating the transfer of electrons from microbial reducing power to a fuel cell cathode.

Design, manufacture and performance evaluation of HTS electromagnets for the hybrid magnetic levitation system

NASA Astrophysics Data System (ADS)

Chu, S. Y.; Hwang, Y. J.; Choi, S.; Na, J. B.; Kim, Y. J.; Chang, K. S.; Bae, D. K.; Lee, C. Y.; Ko, T. K.

2011-11-01

A high speed electromagnetic suspension (EMS) maglev has emerged as the solution to speed limit problem that conventional high-speed railroad has. In the EMS maglev, small levitation gap needs uniform guide-way which leads to increase the construction cost. The large levitation gap can reduce the construction cost. However it is hard for normal conducting electromagnet to produce larger magneto-motive force (MMF) for generating levitation force as increased levitation gap. This is because normal conductors have limited rating current to their specific volume. Therefore, the superconducting electromagnet can be one of the solutions for producing both large levitation gap and sufficient MMF. The superconducting electromagnets have incomparably high allowable current density than what normal conductors have. In this paper, the prototype of high temperature superconducting (HTS) electromagnets were designed and manufactured applicable to hybrid electromagnetic suspension system (H-EMS). The H-EMS consists of control coils for levitation control and superconducting coils for producing MMF for levitation. The required MMF for generating given levitation force was calculated by both equations of ideal U-core magnet and magnetic field analysis using the finite element method (FEM). The HTS electromagnets were designed as double pancakes with Bi-2223/Ag tapes. Experiments to confirm its operating performance were performed in liquid nitrogen (LN2).

Origins of the Tactical Nuclear Weapons Modernization Program: 1969-1979

NASA Astrophysics Data System (ADS)

Yaffe, Michael David

On December 12, 1979, the North Atlantic Treaty Organization decided to deploy new long-range theater nuclear forces, Pershing II and Ground-Launched Cruise Missiles. This marked the first major change in NATO's nuclear stockpile since the adoption of the flexible response strategy in 1967. The decision was controversial inasmuch as the Allies disagreed on the fundamental role of nuclear weapons in this strategy and, thereby, the types and number of weapons required for an effective deterrent posture. Europeans generally preferred long-range weapons capable of striking the Soviet Union and small conventional forces while Americans preferred shorter-range nuclear weapons and a stalwart conventional defense. Thus, the December decision is often described as purely politically motivated, in which the Americans reluctantly acquiesced to a European initiative for long-range weapons, prominently expressed by West German Chancellor Helmut Schmidt in 1977. Recently declassified US government documents reveal, however, that long-range missiles were part of a long-term comprehensive nuclear modernization program conceived in the Pentagon under Defense Secretary James Schlesinger during the period of 1973 through 1975, and presented to skeptical European elites who favored arms control negotiations over costly new deployments. This program was motivated as much by changes in the American national security culture as by an increase in the Soviet military threat to Europe. It was grounded on a clear military rationale: "that a feasible and affordable conventional defense is only possible if NATO has modern nuclear forces" that can effectively hold at risk Warsaw Pact ground and air forces throughout the depth of their employment from the inner-German border to the western military districts of the Soviet Union. When the new US administration in 1977 disagreed with the modernization plan and its rationale, opting instead for more conventional forces, the Allies in a reversal of roles lobbied the US President to deploy the long-range weapons being developed by the Defense Department. In the course of deliberations, political preferences suppressed military considerations of deterrence and only a small portion of the original modernization program was implemented.

Complexion of forces in an anisotropic self-gravitating system

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

Kandrup, H.E.

Chandrasekhar and von Neumann developed a completely stochastic formalism to analyze the complexion of forces acting upon a test star situated in an infinite, homogeneous distribution of field stars. This formalism is generalized here to allow for more realistic inhomogeneous and anisotropic systems. It is demonstrated that the forces acting upon a test star decompose ''naturally'' into the incoherent sum of a mean force associated with the average spatial inhomogeneity and a fluctuating force associated with stochastic deviations from these mean conditions. Moreover, as in the special case considered by Chandrasekhar and von Neumann, one can apparently associate the fluctuatingmore » forces with the effects of particularly proximate field stars, thereby motivating the ''nearest neighbor'' interpretation first introduced by Chandrasekhar.« less

Methodological Issues in the Study of Air Force Organizational Structures,

DTIC Science & Technology

MOTIVATION, MORALE, PERFORMANCE(HUMAN), LEADERSHIP , SKILLS, MANAGEMENT PLANNING AND CONTROL, MODEL THEORY , SYMPOSIA...RESOURCE MANAGEMENT , *HUMAN RESOURCES, *MANPOWER UTILIZATION, *JOB ANALYSIS, *ORGANIZATIONS, STRUCTURES, PERSONNEL MANAGEMENT , DECISION MAKING

A method for the on-site determination of prestressing forces using long-gauge fiber optic strain sensors

NASA Astrophysics Data System (ADS)

Abdel-Jaber, H.; Glisic, B.

2014-07-01

Structural health monitoring (SHM) consists of the continuous or periodic measurement of structural parameters and their analysis with the aim of deducing information about the performance and health condition of a structure. The significant increase in the construction of prestressed concrete bridges motivated this research on an SHM method for the on-site determination of the distribution of prestressing forces along prestressed concrete beam structures. The estimation of the distribution of forces is important as it can give information regarding the overall performance and structural integrity of the bridge. An inadequate transfer of the designed prestressing forces to the concrete cross-section can lead to a reduced capacity of the bridge and consequently malfunction or failure at lower loads than predicted by design. This paper researches a universal method for the determination of the distribution of prestressing forces along concrete beam structures at the time of transfer of the prestressing force (e.g., at the time of prestressing or post-tensioning). The method is based on the use of long-gauge fiber optic sensors, and the sensor network is similar (practically identical) to the one used for damage identification. The method encompasses the determination of prestressing forces at both healthy and cracked cross-sections, and for the latter it can yield information about the condition of the cracks. The method is validated on-site by comparison to design forces through the application to two structures: (1) a deck-stiffened arch and (2) a curved continuous girder. The uncertainty in the determination of prestressing forces was calculated and the comparison with the design forces has shown very good agreement in most of the structures’ cross-sections, but also helped identify some unusual behaviors. The method and its validation are presented in this paper.

False memories for dissonance inducing events.

PubMed

Rodriguez, Dario N; Strange, Deryn

2015-01-01

Memories serve as a "database" of the self and people often produce distorted memories that support their self-concepts. One, surprisingly untested, possibility is that cognitive dissonance may be one mechanism by which people may misremember their past. We tested this hypothesis using an induced-compliance paradigm: participants either chose or were forced to write a counterattitudinal essay supporting a tuition increase and were afforded the opportunity to reduce dissonance via attitude shift or denial of responsibility. They then reported their memories for the experimental instructions and their initial attitudes (assessed two days prior to the laboratory session). Participants who chose to write the essay exhibited the predicted attitude-shift effect, and were more likely to misremember their initial attitudes and the experimental instruction than those who were forced to write the essay. Overall, our results provide evidence that cognitive dissonance may yield memory distortion, filling a significant gap in the motivated cognition and memory literatures.

A novel concurrent pictorial choice model of mood-induced relapse in hazardous drinkers.

PubMed

Hardy, Lorna; Hogarth, Lee

2017-12-01

This study tested whether a novel concurrent pictorial choice procedure, inspired by animal self-administration models, is sensitive to the motivational effect of negative mood induction on alcohol-seeking in hazardous drinkers. Forty-eight hazardous drinkers (scoring ≥7 on the Alcohol Use Disorders Inventory) recruited from the community completed measures of alcohol dependence, depression, and drinking coping motives. Baseline alcohol-seeking was measured by percent choice to enlarge alcohol- versus food-related thumbnail images in two alternative forced-choice trials. Negative and positive mood was then induced in succession by means of self-referential affective statements and music, and percent alcohol choice was measured after each induction in the same way as baseline. Baseline alcohol choice correlated with alcohol dependence severity, r = .42, p = .003, drinking coping motives (in two questionnaires, r = .33, p = .02 and r = .46, p = .001), and depression symptoms, r = .31, p = .03. Alcohol choice was increased by negative mood over baseline (p < .001, ηp2 = .280), and matched baseline following positive mood (p = .54, ηp2 = .008). The negative mood-induced increase in alcohol choice was not related to gender, alcohol dependence, drinking to cope, or depression symptoms (ps ≥ .37). The concurrent pictorial choice measure is a sensitive index of the relative value of alcohol, and provides an accessible experimental model to study negative mood-induced relapse mechanisms in hazardous drinkers. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Life cycles of transient planetary waves

NASA Technical Reports Server (NTRS)

Nathan, Terrence

1993-01-01

In recent years there has been an increasing effort devoted to understanding the physical and dynamical processes that govern the global-scale circulation of the atmosphere. This effort has been motivated, in part, from: (1) a wealth of new satellite data; (2) an urgent need to assess the potential impact of chlorofluorocarbons on our climate; (3) an inadequate understanding of the interactions between the troposphere and stratosphere and the role that such interactions play in short and long-term climate variability; and (4) the realization that addressing changes in our global climate requires understanding the interactions among various components of the earth system. The research currently being carried out represents an effort to address some of these issues by carrying out studies that combine radiation, ozone, seasonal thermal forcing and dynamics. Satellite and ground-based data that is already available is being used to construct basic states for our analytical and numerical models. Significant accomplishments from 1991-1992 are presented and include the following: ozone-dynamics interaction; (2) periodic local forcing and low frequency variability; and (3) steady forcing and low frequency variability.

The 1969–1985 Pozzuoli event and active volcanisms

PubMed Central

Yokoyama, Izumi

2006-01-01

Pozzuoli is located at the center of the Campi Flegrei caldera, near Naples and is famous for its anomalous subsidence and upheaval documented since the Roman period. Its secular and gradual subsidence can be interpreted as self-loading compaction of the caldera fills while abrupt upheavals are geologically suspected to be caused by magmagenic movements or steam forces. In order to interpret the origin and the process of the Pozzuoli upheavals, they are compared with active volcanisms represented by the 1977–1982 eruption of Usu volcano in Hokkaido. Usu volcano outburst in 1977 in major pumice eruptions and repeated magmatic and phreatomagmatic eruptions, and manifested remarkable ground deformations accompanying earthquake swarms. In 1969, the ground of Pozzuoli began to upheave with increases in seismicity but finally failed to cause any eruptive phenomena at the surface; nevertheless there are common characteristics of their motives and processes between the two events. The motive of the Usu deformation is clearly due to magma movements while that of the Pozzuoli upheaval has not been completely settled. A quantitative relationship between seismicity and deformation gives a clue for discussing the motive of the Pozzuoli deformations. The discharge rates of seismic energy and the deformation rates are compared between the two events and a certain similarity is found. This suggests that the origin of the Pozzuoli event may be partly magmatic as well as the Usu eruption, but its behavior largely depends on the property of the caldera deposits. When their deformation volumes are taken into consideration, their characteristics become quantitatively conspicuous. The ground at Pozzuoli is much more easily deformed by the upward motive force than Usu volcano. This is due to the rheological property of the caldera deposits of Campi Flegrei, and agrees to the theory that interprets the secular subsidence observed in historical times, as self-loading compaction. It is interesting that there is a point of contact between anomalous movements of the ground along the seashore in Italy and remarkable magmatic movements at the active volcano in Japan. PMID:25873752

Evaluation of DOD Contracts Regarding Combating Trafficking in Persons

DTIC Science & Technology

2010-01-15

involving sexual slavery, human trafficking, and debt bondage attracted media attention and motivated Congressional action. Prior to 2000, instances of...forced into prostitution in bars in South Korea frequented by U.S. military personnel. In 2004, reports chronicled allegations of forced labor and debt ... bondage against U.S. contractors in Iraq, leading to foreign embassy involvement. These incidents were contrary to U.S. Government policy regarding

Role of motive forces for the spin torque transfer for nano-structures

NASA Astrophysics Data System (ADS)

Barnes, Stewart

2009-03-01

Despite an announced imminent commercial realization of spin transfer random access memory (SPRAM) the current theory evolved from that of Slonczewski [1,2] does not conserve energy. Barnes and Maekawa [3] have shown, in order correct this defect, forces which originate from the spin rather than the charge of an electron must be accounted for, this leading to the concept of spin-motive-forces (smf) which must appear in Faraday's law and which significantly modifies the theory for spin-valves and domain wall devices [4]. A multi-channel theory in which these smf's redirect the spin currents will be described. In nano-structures it is now well known that the Kondo effect is reflected by conductance peaks. In essence, the spin degrees of freedom are used to enhance conduction. In a system with nano-magnets and a Coulomb blockade [5] the similar spin channels can be the only means of effective conduction. This results in a smf which lasts for minutes and an enormous magneto-resistance [5]. This implies the possibility of ``single electron memory'' in which the magnetic state is switched by a single electron. [4pt] [1] J. C. Slonczewski, Current-Driven Excitation of Magnetic Multilayers J. Magn. Magn. Mater. 159, L1 (1996). [0pt] [2] Y. Tserkovnyak, A. Brataas, G. E. W. Bauer, and B. I. Halperin, Nonlocal magnetization dynamics in ferromagnetic heterostructures, Rev. Mod. Phys. 77, 1375 (2005). [0pt] [3] S. E. Barnes and S. Maekawa, Generalization of Faraday's Law to Include Nonconservative Spin Forces Phys. Rev. Lett. 98, 246601 (2007); S. E. Barnes and S. Maekawa, Currents induced by domain wall motion in thin ferromagnetic wires. arXiv:cond-mat/ 0410021v1 (2004). [0pt] [4] S. E., Barnes, Spin motive forces, measurement, and spin-valves. J. Magn. Magn. Mat. 310, 2035-2037 (2007); S. E. Barnes, J. Ieda. J and S. Maekawa, Magnetic memory and current amplification devices using moving domain walls. Appl. Phys. Lett. 89, 122507 (2006). [0pt] [5] Pham-Nam Hai, Byung-Ho Yu, Shinobu Ohya, Masaaki Tanaka, Stewart E. Barnes and Sadamichi Maekawa, Electromotive force and huge magnetoresistance in magnetic tunnel junctions. Submitted Nature, August, (2008).

Military Review. Volume 91, Number 3, May-June 2011

DTIC Science & Technology

2011-06-01

resistance is pervasive. Pashtun concepts of shame and honor are often the impetus to fight. Channeling these impulses to work against the insurgency is...that many factors motivate anti-coalition sentiment—political aims, tribal infighting, economic rewards, and shame or honor motivations. Many...Force to The Bockscar and its crew, who dropped the “ Fat Man” atomic bomb on Nagasaki, 1945. U .S . A ir Fo rc e 86 May-June 2011  MILITARY REVIEW

Three Principles to REVISE People's Unethical Behavior.

PubMed

Ayal, Shahar; Gino, Francesca; Barkan, Rachel; Ariely, Dan

2015-11-01

Dishonesty and unethical behavior are widespread in the public and private sectors and cause immense annual losses. For instance, estimates of U.S. annual losses indicate $1 trillion paid in bribes, $270 billion lost due to unreported income, and $42 billion lost in retail due to shoplifting and employee theft. In this article, we draw on insights from the growing fields of moral psychology and behavioral ethics to present a three-principle framework we call REVISE. This framework classifies forces that affect dishonesty into three main categories and then redirects those forces to encourage moral behavior. The first principle, reminding, emphasizes the effectiveness of subtle cues that increase the salience of morality and decrease people's ability to justify dishonesty. The second principle, visibility, aims to restrict anonymity, prompt peer monitoring, and elicit responsible norms. The third principle, self-engagement, increases people's motivation to maintain a positive self-perception as a moral person and helps bridge the gap between moral values and actual behavior. The REVISE framework can guide the design of policy interventions to defeat dishonesty. © The Author(s) 2015.

The profit motive and spine surgery.

PubMed

Weiner, Bradley K; Levi, Benjamin H

2004-11-15

The profit motive and market medicine have had a significant impact on clinical practice and research in the field of spine surgery. An overview of current concerns is presented. The objective of this study was to provide those involved in the study and treatment of spinal disorders with a critical overview of the effects of the profit motive on our practices. Historically, the profit motive has been viewed as eroding the standards of spine surgery, encouraging surgeons to operate aggressively and researchers to bias their results. Although there are legitimate concerns regarding the role played by such market forces, the profit motive exerts several quite positive effects on spine surgery as well. Negative and positive aspects of the profit motive in spine surgery are explored along with alternative approaches. The profit motive in spine surgery can result in unnecessary surgery, as well as the push to market of unproven technologies. Yet, without a robust profit motive, it is unclear where sufficient funding could be found to support research and education, and to underwrite the advancement of new technologies. The profit motive significantly influences the way we practice and conduct research in spine surgery. To minimize the negative aspects of the profit motive, spine surgeons and researchers must refrain from being used by companies to rush products to market and/or compromising patient care out of self-interest.

Using Expectancy Theory to quantitatively dissociate the neural representation of motivation from its influential factors in the human brain: An fMRI study.

PubMed

Kohli, Akshay; Blitzer, David N; Lefco, Ray W; Barter, Joseph W; Haynes, M Ryan; Colalillo, Sam A; Ly, Martina; Zink, Caroline F

2018-05-08

Researchers have yet to apply a formal operationalized theory of motivation to neurobiology that would more accurately and precisely define neural activity underlying motivation. We overcome this challenge with the novel application of the Expectancy Theory of Motivation to human fMRI to identify brain activity that explicitly reflects motivation. Expectancy Theory quantitatively describes how individual constructs determine motivation by defining motivation force as the product of three variables: expectancy - belief that effort will better performance; instrumentality - belief that successful performance leads to particular outcome, and valence - outcome desirability. Here, we manipulated information conveyed by reward-predicting cues such that relative cue-evoked activity patterns could be statistically mapped to individual Expectancy Theory variables. The variable associated with activity in any voxel is only reported if it replicated between two groups of healthy participants. We found signals in midbrain, ventral striatum, sensorimotor cortex, and visual cortex that specifically map to motivation itself, rather than other factors. This is important because, for the first time, it empirically clarifies approach motivation neural signals during reward anticipation. It also highlights the effectiveness of the application of Expectancy Theory to neurobiology to more precisely and accurately probe motivation neural correlates than has been achievable previously. Copyright © 2018 Elsevier Inc. All rights reserved.

What Effect Did General Order Number 1 and the Force Protection Measures Have on Task Force Eagle Operations in Bosnia During Implementation Force?

DTIC Science & Technology

2002-06-06

avoidance of casualties is essential to preserve domestic support, it may be a necessary price to pay. Another possible motive, however, could be...higher. Right or wrong, this discrepancy nurtured a variety of interpretations. Whilst describing the measures as “based on a profound concern with...soldiers in twos and threes, on PT runs in town, dressed in spiffy Adidas gear, was he confident that the area really was secure. As an aside, this is a

Defense at Low Force Levels: The Effect of Force to Space Ratios on Conventional Combat Dynamics

DTIC Science & Technology

1991-08-01

Ii-ng said mylewisg the caledcion d ancmldice Said cmlusnase r garing fti bunhen sestaf r & m aydw mapsad "iti cabdimi ci of I, ", ikoluing ge Iu... m and effect underlying the more detailed formulation in the appendices, and in so doing, to motivate the relationship between force to space ratios...esp. pp. 609-610; Hugh M . Cole, The Ardennes: Baole of the Bulge (Washington, D.C.: Department of the Army, Office of the Chief of Military Hiswy

Minimum Surface-Effect Microgripper Design for Force-Reflective Telemanipulation of a Microscopic Environment

NASA Technical Reports Server (NTRS)

Goldfarb, Michael; Celanovic, Nikola

1996-01-01

This paper describes the fundamental physical motivations for minimum surface effect design, and presents a microgripper that incorporates a piezoelectric ceramic actuator and a flexure-based structure and transmission. The microgripper serves effectively as a one degree-of-freedom prototype of minimum surface effect micromanipulator design. Data is presented that characterizes the microgripper performance under both pure position and pure force control, followed by a discussion of the attributes and limitations of flexure-based design. The microgripper is interfaced with a force-reflective macrogripper, and the pair controlled with a hybrid position/force scheme. Data is presented that illustrates the effective operation of the telerobotic pair.

The regulation of the chloroplast proton motive force plays a key role for photosynthesis in fluctuating light.

PubMed

Armbruster, Ute; Correa Galvis, Viviana; Kunz, Hans-Henning; Strand, Deserah D

2017-06-01

Plants use sunlight as their primary energy source. During photosynthesis, absorbed light energy generates reducing power by driving electron transfer reactions. These are coupled to the transfer of protons into the thylakoid lumen, generating a proton motive force (pmf) required for ATP synthesis. Sudden alterations in light availability have to be met by regulatory mechanisms to avoid the over-accumulation of reactive intermediates and maximize energy efficiency. Here, the acidification of the lumen, as an intermediate product of photosynthesis, plays an important role by regulating photosynthesis in response to excitation energy levels. Recent findings reveal pmf regulation and the modulation of its composition as key determinants for efficient photosynthesis, plant growth, and survival in fluctuating light environments. Copyright © 2017 The Authors. Published by Elsevier Ltd.. All rights reserved.

Nisin depletes ATP and proton motive force in mycobacteria.

PubMed

Chung, H J; Montville, T J; Chikindas, M L

2000-12-01

This study examined the inhibitory effect of nisin and its mode of action against Mycobacterium smegmatis, a non-pathogenic species of mycobacteria, and M. bovis-Bacill Carmette Guerin (BCG), a vaccine strain of pathogenic M. bovis. In agar diffusion assays, 2.5 mg ml(-1) nisin was required to inhibit M. bovis-BCG. Nisin caused a slow, gradual, time- and concentration-dependent decrease in internal ATP levels in M. bovis-BCG, but no ATP efflux was detected. In mycobacteria, nisin decreased both components of proton motive force (membrane potential, Delta Psi and Delta pH) in a time- and concentration-dependent manner. However, mycobacteria maintained their intracellular ATP levels during the initial time period of Delta Psi and Delta pH dissipation. These data suggest that the mechanism of nisin in mycobacteria is similar to that in food-borne pathogens.

Magnetic design and method of a superconducting magnet for muon g - 2/EDM precise measurements in a cylindrical volume with homogeneous magnetic field

NASA Astrophysics Data System (ADS)

Abe, M.; Murata, Y.; Iinuma, H.; Ogitsu, T.; Saito, N.; Sasaki, K.; Mibe, T.; Nakayama, H.

2018-05-01

A magnetic field design method of magneto-motive force (coil block (CB) and iron yoke) placements for g - 2/EDM measurements has been developed and a candidate placements were designed under superconducting limitations of current density 125 A/mm2 and maximum magnetic field on CBs less than 5.5 T. Placements of CBs and an iron yoke with poles were determined by tuning SVD (singular value decomposition) eigenmode strengths. The SVD was applied on a response matrix from magneto-motive forces to the magnetic fields in the muon storage region and two-dimensional (2D) placements of magneto-motive forces were designed by tuning the magnetic field eigenmode strengths obtained by the magnetic field. The tuning was performed iteratively. Magnetic field ripples in the azimuthal direction were minimized for the design. The candidate magnetic design had five CBs and an iron yoke with center iron poles. The magnet satisfied specifications of homogeneity (0.2 ppm peak-to-peak in 2D placements (the cylindrical coordinate of the radial position R and axial position Z) and less than 1.0 ppm ripples in the ring muon storage volume (0.318 m < R < 0 . 348 m and -0.05 < Z < 0.05 m) with 3.0 T strength and a slightly negative BR (magnetic field radial component) at Z > 0.0 m) for the spiral muon injection from the iron yoke at top.

Exploring children's movement characteristics during virtual reality video game play.

PubMed

Levac, Danielle; Pierrynowski, Michael R; Canestraro, Melissa; Gurr, Lindsay; Leonard, Laurean; Neeley, Christyann

2010-12-01

There is increasing interest in the use of commercially-available virtual reality video gaming systems within pediatric rehabilitation, yet little is known about the movement characteristics of game play. This study describes quantity and quality of movement during Nintendo Wii and Wii Fit game play, explores differences in these movement characteristics between games and between novice and experienced players, and investigates whether motivation to succeed at the game impacts movement characteristics. Thirty-eight children (aged 7-12) with and without previous game experience played Wii (boxing and tennis) and Wii Fit (ski slalom and soccer heading) games. Force plate data provided center of pressure displacement (quantity) and processed pelvis motion indicated smoothness of pelvic movement (quality). Children rated their motivation to succeed at each game. Movement quantity and quality differed between games (p<.001). Children with previous experience playing Wii Fit games demonstrated greater movement quantity during Wii Fit game play (p<.001); quality of movement did not differ between groups. Motivation to succeed did not influence the relationship between experience and outcomes. Findings enhance clinical understanding of this technology and inform the development of research questions to explore its potential to improve movement skills in children with motor impairments. Copyright © 2010 Elsevier B.V. All rights reserved.

Thoughts on why in CESM a more poleward TOA energy imbalance favors more ocean-centric energy transport and weaker ITCZ shift responses

NASA Astrophysics Data System (ADS)

Yu, S.; Pritchard, M. S.

2017-12-01

The role of different location of top-of-atmosphere (TOA) solar forcing to the annual-mean, zonal-mean ITCZ location is examined in a dynamic ocean coupled Community Earth System Model. We observe a damped ITCZ shift response that is now a familiar response of coupled GCMs, but a new finding is that the damping efficiency is increases monotonically as the latitudinal location of forcing is moved poleward. More Poleward forcing cases exhibit weaker shifts of the annual-mean ITCZ position consistent with a more ocean-centric cross-equatorial energy partitioning response to the forcing, which is in turn linked to changes in ocean circulation, not thermodynamic structure. The ocean's dynamic response is partly due to Ekman-driven shallow overturning circulation responses, as expected from a recent theory, but also contains a significant Atlantic meridional overturning circulation (AMOC) component--which is in some sense surprising given that it is activated even in near-tropical forcing experiments. Further analysis of the interhemispheric energy budget reveals the surface heating feedback response provides a useful framework for interpreting the cross-equatorial energy transport partitioning between atmosphere and ocean. Overall, the results of this study may help explain the mixed results of the degree of ITCZ shift response to interhemispheric asymmetric forcing documented in coupled GCMs in recent years. Furthermore, the sensitive AMOC response motivates expanding current coupled theoretical frameworks on meridional energy transport partitioning to include effects beyond Ekman transport.

REDUCTIONS WITHOUT REGRET: DETAILS - AVOIDING BOX CANYONS, ROACH MOTELS, AND WRONG TURNS

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

Swegle, John A.; Tincher, Douglas J.

The United States is concurrently pursuing the goals of reducing the size of its nuclear weapons force – strategic and non-strategic, deployed and non-deployed – and of modernizing the weapons it continues to possess. Many of the existing systems were deployed 30 to 50 years ago, and the modernization process can be expected to extend over the next decade or more. Given the impossibility of predicting the future over the lifetime of systems that could extend to the end of this century, it is essential that dead ends in force development be avoided, and the flexibility and availability of optionsmore » be retained that allow for • Scalability downward in the event that further reductions are agreed upon; • Reposturing to respond to changes in threat levels and to new nuclear actors; and • Breakout response in the event that a competitor significantly increases its force size or force capability, In this paper, we examine the current motivations for reductions and modernization; review a number of historical systems and the attendant capabilities that have been eliminated in recent decades; discuss the current path forward for the U.S. nuclear force; provide a view of the evolving deterrence situation and our assessment of the uncertainties involved; and present examples of possibly problematic directions in force development. We close with our thoughts on how to maintain flexibility and the availability of options for which a need might recur in the future.« less

The right side? Under time pressure, approach motivation leads to right-oriented bias.

PubMed

Roskes, Marieke; Sligte, Daniel; Shalvi, Shaul; De Dreu, Carsten K W

2011-11-01

Approach motivation, a focus on achieving positive outcomes, is related to relative left-hemispheric brain activation, which translates to a variety of right-oriented behavioral biases. In two studies, we found that approach-motivated individuals display a right-oriented bias, but only when they are forced to act quickly. In a task in which they had to divide lines into two equal parts, approach-motivated individuals bisected the line at a point farther to the right than avoidance-motivated individuals did, but only when they worked under high time pressure. In our analysis of all Fédération Internationale de Football Association (FIFA) World Cup penalty shoot-outs, we found that goalkeepers were two times more likely to dive to the right than to the left when their team was behind, a situation that we conjecture induces approach motivation. Because penalty takers shot toward the two sides of the goal equally often, the goalkeepers' right-oriented bias was dysfunctional, allowing more goals to be scored. Directional biases may facilitate group coordination but prove maladaptive in individual settings and interpersonal competition.

Studying Food Reward and Motivation in Humans

PubMed Central

Ziauddeen, Hisham; Subramaniam, Naresh; Cambridge, Victoria C.; Medic, Nenad; Farooqi, Ismaa Sadaf; Fletcher, Paul C.

2014-01-01

A key challenge in studying reward processing in humans is to go beyond subjective self-report measures and quantify different aspects of reward such as hedonics, motivation, and goal value in more objective ways. This is particularly relevant for the understanding of overeating and obesity as well as their potential treatments. In this paper are described a set of measures of food-related motivation using handgrip force as a motivational measure. These methods can be used to examine changes in food related motivation with metabolic (satiety) and pharmacological manipulations and can be used to evaluate interventions targeted at overeating and obesity. However to understand food-related decision making in the complex food environment it is essential to be able to ascertain the reward goal values that guide the decisions and behavioral choices that people make. These values are hidden but it is possible to ascertain them more objectively using metrics such as the willingness to pay and a method for this is described. Both these sets of methods provide quantitative measures of motivation and goal value that can be compared within and between individuals. PMID:24686284

Studying food reward and motivation in humans.

PubMed

Ziauddeen, Hisham; Subramaniam, Naresh; Cambridge, Victoria C; Medic, Nenad; Farooqi, Ismaa Sadaf; Fletcher, Paul C

2014-03-19

A key challenge in studying reward processing in humans is to go beyond subjective self-report measures and quantify different aspects of reward such as hedonics, motivation, and goal value in more objective ways. This is particularly relevant for the understanding of overeating and obesity as well as their potential treatments. In this paper are described a set of measures of food-related motivation using handgrip force as a motivational measure. These methods can be used to examine changes in food related motivation with metabolic (satiety) and pharmacological manipulations and can be used to evaluate interventions targeted at overeating and obesity. However to understand food-related decision making in the complex food environment it is essential to be able to ascertain the reward goal values that guide the decisions and behavioral choices that people make. These values are hidden but it is possible to ascertain them more objectively using metrics such as the willingness to pay and a method for this is described. Both these sets of methods provide quantitative measures of motivation and goal value that can be compared within and between individuals.

Impressions of Milgram's obedient teachers: situational cues inform inferences about motives and traits.

PubMed

Reeder, Glenn D; Monroe, Andrew E; Pryor, John B

2008-07-01

The research investigated impressions formed of a "teacher" who obeyed an experimenter by delivering painful electric shocks to an innocent person (S. Milgram, 1963, 1974). Three findings emerged across different methodologies and different levels of experimenter-induced coercion. First, contrary to conventional wisdom, perceivers both recognized and appreciated situational forces, such as the experimenter's orders that prompted the aggression. Second, perceivers' explanations of the teacher's behavior focused on the motive of obedience (i.e., wanting to appease the experimenter) rather than on hurtful (or evil) motivation. Despite this overall pattern, perceptions of hurtful versus helpful motivation varied as a function of information regarding the level of coercion applied by the experimenter. Finally, theoretically important relationships were revealed among perceptions of situations, motives, and traits. In particular, situational cues (such as aspects of the experimenter's behavior) signaled the nature of the teacher's motives, which in turn informed inferences of the teacher's traits. Overall, the findings pose problems for the lay dispositionism perspective but fit well with multiple inference models of dispositional inference.

Promoting Transformational Leadership Through Air Force Culture

DTIC Science & Technology

2013-03-01

this, leaders tailor their behavior toward their fellow Airmen’s need for motivation, achievement, and sense of belonging, recognition, self - esteem ...first, service before self and excellence in all we do – while pursuing adaptive and innovative solutions for our nation’s security. —Air Force...extraverted leaders one would expect. In fact, Collins found most of the leaders to be, “ self -effacing, quiet, reserved, even shy – these are a

Moderate High Fat Diet Increases Sucrose Self-Administration In Young Rats

PubMed Central

Figlewicz, Dianne P.; Jay, Jennifer L.; Acheson, Molly A.; Magrisso, Irwin J.; West, Constance H.; Zavosh, Aryana; Benoit, Stephen C.; Davis, Jon F.

2012-01-01

We have previously reported that a moderately high fat diet increases motivation for sucrose in adult rats. In this study, we tested the motivational, neurochemical, and metabolic effects of the high fat diet in male rats transitioning through puberty, during 5-8 weeks of age. We observed that the high fat diet increased motivated responding for sucrose, which was independent of either metabolic changes or changes in catecholamine neurotransmitter metabolites in the nucleus accumbens. However, AGRP mRNA levels in the hypothalamus were significantly elevated. We demonstrated that increased activation of AGRP neurons is associated with motivated behavior, and that exogenous (third cerebroventricular) AGRP administration resulted in significantly increased motivation for sucrose. These observations suggest that increased expression and activity of AGRP in the medial hypothalamus may underlie the increased responding for sucrose caused by the high fat diet intervention. Finally, we compared motivation for sucrose in pubertal vs. adult rats and observed increased motivation for sucrose in the pubertal rats, which is consistent with previous reports that young animals and humans have an increased preference for sweet taste, compared with adults. Together, our studies suggest that background diet plays a strong modulatory role in motivation for sweet taste in adolescent animals. PMID:23023044

Women and changes in the Chilean economy: some questions.

PubMed

Smiaroski, M S

1996-10-01

The author argues that a new development model that encourages greater participation of women in the work force in domestic piecework, temporary work, and subcontracting may further lead to the exploitation of women in Chile. The importance of women in economic development in Chile should be based on building skills, providing support child care services, reorienting women's education, and tax incentives. Chile over the past decade has achieved relatively stable economic growth and increased employment of women. During 1990-93 the growth of women in the work force increased at a rate of 16.8%, while men's presence increased by only 9.8%. The Chilean economy is based on a sophisticated modern sector and a labor-intensive informal sector. The Chilean model of development relies on cheap, flexible labor and a government approval of this model. Increased participation of women in the labor force is usually perceived as increased economic empowerment. A 1994 Oxfam study found that women were being forced into the labor market due to declines in family income and low wages. 46% of men and women received wages that did not cover basic necessities. The Chilean labor market is gender-stratified. Men are paid better than women for the same work. Men are in more permanent positions. Labor laws are either inadequate or violated, particularly for hours of work and overtime pay and conditions of employment and benefits. Traditional female jobs are those that rely on women's natural attributes. These unskilled attributes are rewarded with low wages. Little opportunity is provided for upgrading skills or acquiring new skills. Some women turn down advancement because of a lack of role models. Women have little opportunity to develop their self-image as workers. Poor self-images affect women's work attitudes and motivation. Some firms use competition between women to boost production. Chilean women remain in subordinate roles.

Agent-Based Modeling and Simulation: Proposal for Department of Defense Support to the Whole of Government Approach In Afghanistan

DTIC Science & Technology

2012-05-11

September 1, 2011). 5 Abraham Maslow , Motivation and Personality, Third Edition, Harper and Row Publishers, 1954, 91-236. 6 Joshua M. Epstein, “Why...Response Program." Joint Force Quarterly, no. 37 (2005): 46, http://www.dtic.mil/doctrine/jel/jfq_pubs/0937.pdf (accessed October 15, 2011). Maslow ... Abraham . Motivation and Personality. Third ed. New York, New York: Harper and Row, 1954. Mattis, James. US Central Command Commander’s Posture

An Investigation of the Factors Motivating Meaningful Learning of Statistics by Graduate Systems Management Students at AFIT.

DTIC Science & Technology

1987-09-01

DAC-RiB 271 AN INVESTIGATION OF THE FACTORS MOTIVATING MEANINGFUL v’ LEARNING OF STATIST (U) AIR FORCE INST OF TECH WRIGHT-PATTERSON RFB OH SCHOOL OF...Furthermore, the views expressed in the document are those of the author and do not necessarily reflect the views of the School of Systems and...MEANINGFUL LEARNING OF STATISTICS BY GRADUATE SYSTEMS MANAGEMENT STUDENTS AT AFIT THESIS Presented to the Faculty of the School of Systems and Logistics

Self-determination theory and physical activity among breast cancer survivors.

PubMed

Milne, Helen M; Wallman, Karen E; Guilfoyle, Andrew; Gordon, Sandy; Corneya, Kerry S

2008-02-01

The study aim was to examine constructs of autonomy support and competence as well as the motivation continuum from the self-determination theory (SDT) as a framework for understanding physical activity (PA) motivation and behavior in breast cancer survivors. Questionnaires assessing demographics, medical factors, PA, motivation continuum, perceived autonomy support, and competence were completed by 558 breast cancer survivors. Results showed that lymphedema (chi2 = 7.9, p < .01) (chi2 = 4.6, p < .05) were associated with meeting PA guidelines. Moreover, survivors meeting PA guidelines reported more identified regulations and intrinsic motivation (p < .01), autonomy support (p < .01), and competence (p < .01). Forced entry hierarchical regression analysis showed that SDT constructs explained 20.2% (p < .01) of the PA variance. Significant independent SDT predictors included identified regulation (Beta = .14, p < .05) and competence (Beta = .23, p < .01), with autonomy support approaching significance (Beta = .9, p = .057). SDT may be a useful model for understanding PA motivation and behavior in breast cancer survivors.

Use of the Exponential and Exponentiated Demand Equations to Assess the Behavioral Economics of Negative Reinforcement

PubMed Central

Fragale, Jennifer E. C.; Beck, Kevin D.; Pang, Kevin C. H.

2017-01-01

Abnormal motivation and hedonic assessment of aversive stimuli are symptoms of anxiety and depression. Symptoms influenced by motivation and anhedonia predict treatment success or resistance. Therefore, a translational approach to the study of negatively motivated behaviors is needed. We describe a novel use of behavioral economics demand curve analysis to investigate negative reinforcement in animals that separates hedonic assessment of footshock termination (i.e., relief) from motivation to escape footshock. In outbred Sprague Dawley (SD) rats, relief increased as shock intensity increased. Likewise, motivation to escape footshock increased as shock intensity increased. To demonstrate the applicability to anxiety disorders, hedonic and motivational components of negative reinforcement were investigated in anxiety vulnerable Wistar Kyoto (WKY) rats. WKY rats demonstrated increased motivation for shock cessation with no difference in relief as compared to control SD rats, consistent with a negative bias for motivation in anxiety vulnerability. Moreover, motivation was positively correlated with relief in SD, but not in WKY. This study is the first to assess the hedonic and motivational components of negative reinforcement using behavioral economic analysis. This procedure can be used to investigate positive and negative reinforcement in humans and animals to gain a better understanding of the importance of motivated behavior in stress-related disorders. PMID:28270744

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

Gust, Devens; Moore, Thomas A.; Moore, Ana L.

OAK B188 The goal of this project is to mimic the energy transduction processes by which photosynthetic organisms harvest sunlight and convert it to forms of energy that are more easily used and stored. The results may lead to new technologies for solar energy harvesting based on the natural photosynthetic process. They may also enrich our understanding and control of photosynthesis in living organisms, and lead to methods for increasing natural biomass production, carbon dioxide removal, and oxygen generation. In our work to date, we have learned how to make synthetic antenna and reaction center molecules that absorb light andmore » undergo photoinduced electron transfer to generate long-lived, energetic charge-separated states. We have assembled a prototype system in which artificial reaction centers are inserted into liposomes (artificial cell-like constructs), where they carry out light-driven transmembrane translocation of hydrogen ions to generate proton motive force. By insertion of natural ATP synthase into the liposomal bilayer, this proton motive force has been used to power the synthesis of ATP. ATP is a natural biological energy currency. We are carrying out a systematic investigation of these artificial photosynthetic energy harvesting constructs in order to understand better how they operate. In addition, we are exploring strategies for reversing the direction of the light-powered proton pumping. Most recently, we have extended these studies to develop a light-powered transmembrane calcium ion pump that converts sunlight into energy stored as a calcium ion concentration gradient across a lipid bilayer.« less

Motivating Students in the 21st Century.

PubMed

Sedden, Mandy L; Clark, Kevin R

2016-07-01

To examine instructors' and students' perspectives on motivation in the classroom and clinical environments and to explore instructional strategies educators can use to motivate college students in the 21st century. Articles selected for this review were from peer-reviewed journals and scholarly sources that emphasized student and educator perspectives on motivation and instructional strategies to increase student motivation. Understanding how college students are motivated can help educators engage students in lessons and activities, ultimately improving the students' academic performance. Students exhibit increased motivation in classes when educators have high expectations, conduct an open-atmosphere classroom, and use multidimensional teaching strategies. Instructional styles such as connecting with students, creating an interactive classroom, and guiding and reminding students improved student motivation. Radiologic science educators must be mindful of how college students are motivated and use various instructional strategies to increase students' motivation in the classroom and clinical setting. ©2016 American Society of Radiologic Technologists.

Minimum surface-effect microgripper design for force-reflective telemanipulation of a microscopic environment

NASA Technical Reports Server (NTRS)

Goldfarb, Michael; Celanovic, Nikola

1996-01-01

This paper describes the fundamental physical motivations for a minimum surface effect design, and presents a microgripper that incorporates a piezoelectric ceramic actuator and a flexure-based structure and transmission. The microgripper serves effectively as a one degree-of-freedom prototype of a minimum surface effect micromanipulator design. Data is presented that characterizes the microgripper performance under both pure position and pure force control, followed by a discussion of the attributes and limitations of flexure-based design. The microgripper is interfaced with a force reflective macrogripper, and the pair is controlled with a hybrid position/force scheme. Data is presented that illustrates the effective operation of the telerobotic pair.

Supersonic Inlet Flow Control Using Localized Arc Filament Plasma Actuators

DTIC Science & Technology

2011-05-10

Jon Schmisseur and by the Air Vehicle Directorate of the Air Force Research Laboratory is greatly appreciated. 4 Table of Contents Abstract...of interest to the U.S. Air Force and could pose significant problems depending on the specific application. This study has undertaken to investigate...experiments motivated the design of a new, larger, more flexible facility that utilize a Variable Angle Wedge to generate the impinging shock wave for

Reasons for Using and Not Using Air Force Morale, Welfare, and Recreation Programs

DTIC Science & Technology

1987-02-01

February 2, 11 Draft Report: February 24 I I 1-2 I 1.2 SURVEY APPROACH This study supplies information on MWR usage and underlying motivations ...objective was to complete interviews with 500 officers and 500 enlisted personnel whose distribution exactly matched the distribution of the original...insured the distribution of the 1000 completed interviews across the strata matched the distribution of all Air Force personnel. The data collection

An Analysis of the Twenty-One Missions of the Marine Corps Expeditionary Unit (Special Operations Capable)

DTIC Science & Technology

1994-06-03

unconventional warfare capability, consist of Army Special Forces and certain Navy, Air Force, and Marine Corps units as assigned. 4. Foreign ;ntgnal Pef~nse (JCS...7. Psychological Operations (JC5 Pub J-Q2): Planned operations to convey selected information and indicators to foreign audiences to influence their...emotions, motives, objective reasoning, and ultimately, the behavior of foreign governments, organizations groups, and individuals. The purpose of

The American Expeditionary Force Siberia: A Case Study of Operational Art with Ambiguous Strategic Objectives

DTIC Science & Technology

2014-05-22

Service Corp SecDef Secretary of Defense 1 CHAPTER 1: INTRODUCTION The political object-the original motive for the war-will thus determine...committed to the original strategic objective even though it limited his tactical options. 8 In the end, the campaign concluded with limited tangible...of these Russian military theorists. Originally , the United States Army defined operational art as “the employment of military forces to attain

Moderate high fat diet increases sucrose self-administration in young rats.

PubMed

Figlewicz, Dianne P; Jay, Jennifer L; Acheson, Molly A; Magrisso, Irwin J; West, Constance H; Zavosh, Aryana; Benoit, Stephen C; Davis, Jon F

2013-02-01

We have previously reported that a moderately high fat diet increases motivation for sucrose in adult rats. In this study, we tested the motivational, neurochemical, and metabolic effects of the high fat diet in male rats transitioning through puberty, during 5-8 weeks of age. We observed that the high fat diet increased motivated responding for sucrose, which was independent of either metabolic changes or changes in catecholamine neurotransmitter metabolites in the nucleus accumbens. However, AGRP mRNA levels in the hypothalamus were significantly elevated. We demonstrated that increased activation of AGRP neurons is associated with motivated behavior, and that exogenous (third cerebroventricular) AGRP administration resulted in significantly increased motivation for sucrose. These observations suggest that increased expression and activity of AGRP in the medial hypothalamus may underlie the increased responding for sucrose caused by the high fat diet intervention. Finally, we compared motivation for sucrose in pubertal vs. adult rats and observed increased motivation for sucrose in the pubertal rats, which is consistent with previous reports that young animals and humans have an increased preference for sweet taste, compared with adults. Together, our studies suggest that background diet plays a strong modulatory role in motivation for sweet taste in adolescent animals. Published by Elsevier Ltd.

Energy Equivalence of Information in the Mitochondrion and the Thermodynamic Efficiency of ATP Synthase.

PubMed

Matta, Chérif F; Massa, Lou

2015-09-01

Half a century ago, Johnson and Knudsen resolved the puzzle of the apparent low efficiency of the kidney (∼ 0.5%) compared to most other bodily organs (∼ 40%) by taking into account the entropic cost of ion sorting, the principal function of this organ. Similarly, it is shown that the efficiency of energy transduction of the chemiosmotic proton-motive force by ATP synthase is closer to 90% instead of the oft-quoted textbook value of only 60% when information theoretic considerations are applied to the mitochondrion. This high efficiency is consistent with the mechanical energy transduction of ATP synthase known to be close to the 100% thermodynamic limit. It would have been wasteful for evolution to maximize the mechanical energy transduction to 100% while wasting 40% of the chemiosmotic free energy in the conversion of the proton-motive force into mechanical work before being captured as chemical energy in adenosine 5'-triphosphate.

Costs of using motivational interviewing for problem drinking in the U.S. Air Force.

PubMed

Cowell, Alexander J; Brown, Janice M; Wedehase, Brendan J; Masuda, Yuta J

2010-12-01

Despite the popularity of motivational interviewing (MI) to address heavy drinking, limited evidence exists on the costs of using MI to address heavy drinking. This study examines the costs of using MI to address heavy drinking at four U.S. Air Force (USAF) bases. Clients were referred to and assessed at a base program to address their drinking as a result of an incident; those who were not alcohol dependent were invited to participate in the study. Participants consented and were randomly assigned to one of three intervention arms: individual MI (IMI), group MI (GMI), and Substance Abuse Awareness Seminar (SAAS). Three cost perspectives were taken: USAF, client, and the two combined. Data were collected from bases and public sources. The start-up cost per base ranged from $1340 to $2400 per provider staff member. Average implementation costs across bases were highest for the SAAS intervention ($148 per client).

Motivation for aggressive religious radicalization: goal regulation theory and a personality × threat × affordance hypothesis

PubMed Central

McGregor, Ian; Hayes, Joseph; Prentice, Mike

2015-01-01

A new set of hypotheses is presented regarding the cause of aggressive religious radicalization (ARR). It is grounded in classic and contemporary theory of human motivation and goal regulation, together with recent empirical advances in personality, social, and neurophysiological psychology. We specify personality traits, threats, and group affordances that combine to divert normal motivational processes toward ARR. Conducive personality traits are oppositional, anxiety-prone, and identity-weak (i.e., morally bewildered). Conducive threats are those that arise from seemingly insurmountable external forces and frustrate effective goal regulation. Conducive affordances include opportunity for immediate and concrete engagement in active groups that are powered by conspiracy narratives, infused with cosmic significance, encouraging of moral violence, and sealed with religious unfalsifiability. We propose that ARR is rewarding because it can spur approach motivated states that mask vulnerability for people whose dispositions and circumstances would otherwise leave them mired in anxious distress. PMID:26441709

Cosmocultural Evolution: Cosmic Motivation for Interstellar Travel?

NASA Astrophysics Data System (ADS)

Lupisella, M.

Motivations for interstellar travel can vary widely from practical survival motivations to wider-ranging moral obligations to future generations. But it may also be fruitful to explore what, if any, "cosmic" relevance there may be regarding interstellar travel. Cosmocultural evolution can be defined as the coevolution of cosmos and culture, with cultural evolution playing an important and perhaps critical role in the overall evolution of the universe. Strong versions of cosmocultural evolution might suggest that cultural evolution may have unlimited potential as a cosmic force. In such a worldview, the advancement of cultural beings throughout the universe could have significant cosmic relevance, perhaps providing additional motivation for interstellar travel. This paper will explore some potential philosophical and policy implications for interstellar travel of a cosmocultural evolutionary perspective and other related concepts, including some from a recent NASA book, Cosmos and Culture: Cultural Evolution in a Cosmic Context.

Motivation for aggressive religious radicalization: goal regulation theory and a personality × threat × affordance hypothesis.

PubMed

McGregor, Ian; Hayes, Joseph; Prentice, Mike

2015-01-01

A new set of hypotheses is presented regarding the cause of aggressive religious radicalization (ARR). It is grounded in classic and contemporary theory of human motivation and goal regulation, together with recent empirical advances in personality, social, and neurophysiological psychology. We specify personality traits, threats, and group affordances that combine to divert normal motivational processes toward ARR. Conducive personality traits are oppositional, anxiety-prone, and identity-weak (i.e., morally bewildered). Conducive threats are those that arise from seemingly insurmountable external forces and frustrate effective goal regulation. Conducive affordances include opportunity for immediate and concrete engagement in active groups that are powered by conspiracy narratives, infused with cosmic significance, encouraging of moral violence, and sealed with religious unfalsifiability. We propose that ARR is rewarding because it can spur approach motivated states that mask vulnerability for people whose dispositions and circumstances would otherwise leave them mired in anxious distress.

The relationship between physical activity and health status in patients with chronic obstructive pulmonary disease following pulmonary rehabilitation.

PubMed

Meshe, Oluwasomi Festus; Claydon, Leica Sarah; Bungay, Hilary; Andrew, Sharon

2017-04-01

To investigate the relationship between physical activity (PA) and measures of health-related quality of life (HRQoL) and hospital admissions in people with chronic obstructive pulmonary disease (COPD) following pulmonary rehabilitation (PR). CINAHL, Medline, PubMed, AMED, PsycINFO and Cochrane Library (database inception to July 2014) were searched. Relevant outcomes included relationships between PA and HRQoL, lung function (forced expiratory volume in one second, FEV 1 ) and/or hospital admission. Six quantitative and 11 qualitative studies were included and Harden's method of data synthesis in a mixed-methods systematic review was applied. Six months following PR, increase activity levels was associated with improvement of 62m in 6MWD, 2.31 and 15.55 points increase in SGRQ and CRDQ total scores, respectively, 1.3% FEV 1 and reduced dyspnoea. No study reported on hospital admission. Reported relationships were facilitated by healthcare professionals, social supporters, motivation and encouragement, reduced fear and seeing benefits and hindered by changing physical health, environment, lack of motivation, fear and social isolation. The associations between increased levels of PA and quality of life, respiratory function and dyspnoea are largely based on 6MWD and PA questionnaires. Objective measurement of free living activity in exercise maintenance phase is required along with participants' views. Implications for rehabilitation Pulmonary rehabilitation (PR) is a non-therapeutic intervention in which a team of multidisciplinary health care professionals use individually tailored supervised exercise training, self-management education, psychological and social support to optimize the physical and social performance and autonomy of patients with chronic respiratory impairment. Initial benefits from PR decline after program completion. Clinical guidelines advocate increase exercise and activity in sustaining initial benefits of PR. Following PR, increased levels of physical activity in people with COPD undertaking exercise maintenance programmes are positively related with improvements in exercise capacity, quality of life and dyspnoea. Barriers to activity participation in exercise maintenance programmes, which need to be overcome, are fear, lack of motivation, environmental factors, such as social isolation and changes in physical health. Rehabilitation professionals and social supporters can make rehabilitation more long-lasting and facilitate people with COPD to participate in activity by motivating and encouraging them, reducing their fears and reinforcing the benefits of activity participation.

Grip force control during virtual object interaction: effect of force feedback,accuracy demands, and training.

PubMed

Gibo, Tricia L; Bastian, Amy J; Okamura, Allison M

2014-03-01

When grasping and manipulating objects, people are able to efficiently modulate their grip force according to the experienced load force. Effective grip force control involves providing enough grip force to prevent the object from slipping, while avoiding excessive force to avoid damage and fatigue. During indirect object manipulation via teleoperation systems or in virtual environments, users often receive limited somatosensory feedback about objects with which they interact. This study examines the effects of force feedback, accuracy demands, and training on grip force control during object interaction in a virtual environment. The task required subjects to grasp and move a virtual object while tracking a target. When force feedback was not provided, subjects failed to couple grip and load force, a capability fundamental to direct object interaction. Subjects also exerted larger grip force without force feedback and when accuracy demands of the tracking task were high. In addition, the presence or absence of force feedback during training affected subsequent performance, even when the feedback condition was switched. Subjects' grip force control remained reminiscent of their employed grip during the initial training. These results motivate the use of force feedback during telemanipulation and highlight the effect of force feedback during training.

Tetramers of Two Heavy and Two Light Bosons

NASA Astrophysics Data System (ADS)

Naidon, Pascal

2018-07-01

This article considers the bound states of two heavy and two light bosons, when a short-range force attracts the bosons of different mass, and a short-range force repels the light bosons. The existence of such four-body bound states results from the competition between these two forces. For a given strength of the attraction, the critical strength of the repulsion necessary to unbind the four particles is calculated. This study is motivated by the experimental realisation of impurity atoms immersed in an atomic Bose-Einstein condensate, and aims at determining in which regime only one boson contributes to binding two impurities.

Unbinding of targeted ultrasound contrast agent microbubbles by secondary acoustic forces.

PubMed

Garbin, Valeria; Overvelde, Marlies; Dollet, Benjamin; de Jong, Nico; Lohse, Detlef; Versluis, Michel

2011-10-07

Targeted molecular imaging with ultrasound contrast agent microbubbles is achieved by incorporating targeting ligands on the bubble coating and allows for specific imaging of tissues affected by diseases. Improved understanding of the interplay between the acoustic forces acting on the bubbles during insonation with ultrasound and other forces (e.g. shear due to blood flow, binding of targeting ligands to receptors on cell membranes) can help improve the efficacy of this technique. This work focuses on the effects of the secondary acoustic radiation force, which causes bubbles to attract each other and may affect the adhesion of targeted bubbles. First, we examine the translational dynamics of ultrasound contrast agent microbubbles in contact with (but not adherent to) a semi-rigid membrane due to the secondary acoustic radiation force. An equation of motion that effectively accounts for the proximity of the membrane is developed, and the predictions of the model are compared with experimental data extracted from optical recordings at 15 million frames per second. A time-averaged model is also proposed and validated. In the second part of the paper, initial results on the translation due to the secondary acoustic radiation force of targeted, adherent bubbles are presented. Adherent bubbles are also found to move due to secondary acoustic radiation force, and a restoring force is observed that brings them back to their initial positions. For increasing magnitude of the secondary acoustic radiation force, a threshold is reached above which the adhesion of targeted microbubbles is disrupted. This points to the fact that secondary acoustic radiation forces can cause adherent bubbles to detach and alter the spatial distribution of targeted contrast agents bound to tissues during activation with ultrasound. While the details of the rupture of intermolecular bonds remain elusive, this work motivates the use of the secondary acoustic radiation force to measure the strength of adhesion of targeted microbubbles.

Smart Manufacturing.

PubMed

Davis, Jim; Edgar, Thomas; Graybill, Robert; Korambath, Prakashan; Schott, Brian; Swink, Denise; Wang, Jianwu; Wetzel, Jim

2015-01-01

Historic manufacturing enterprises based on vertically optimized companies, practices, market share, and competitiveness are giving way to enterprises that are responsive across an entire value chain to demand dynamic markets and customized product value adds; increased expectations for environmental sustainability, reduced energy usage, and zero incidents; and faster technology and product adoption. Agile innovation and manufacturing combined with radically increased productivity become engines for competitiveness and reinvestment, not simply for decreased cost. A focus on agility, productivity, energy, and environmental sustainability produces opportunities that are far beyond reducing market volatility. Agility directly impacts innovation, time-to-market, and faster, broader exploration of the trade space. These changes, the forces driving them, and new network-based information technologies offering unprecedented insights and analysis are motivating the advent of smart manufacturing and new information technology infrastructure for manufacturing.

Exercising self-control increases approach motivation.

PubMed

Schmeichel, Brandon J; Harmon-Jones, Cindy; Harmon-Jones, Eddie

2010-07-01

The present research tested the hypothesis that exercising self-control causes an increase in approach motivation. Study 1 found that exercising (vs. not exercising) self-control increases self-reported approach motivation. Study 2a identified a behavior--betting on low-stakes gambles--that is correlated with approach motivation but is relatively uncorrelated with self-control, and Study 2b observed that exercising self-control temporarily increases this behavior. Last, Study 3 found that exercising self-control facilitates the perception of a reward-relevant symbol (i.e., a dollar sign) but not a reward-irrelevant symbol (i.e., a percent sign). Altogether, these results support the hypothesis that exercising self-control temporarily increases approach motivation. Failures of self-control that follow from prior efforts at self-control (i.e., ego depletion) may be explained in part by increased approach motivation.

Explosive lower limb extension mechanics: An on-land vs. in-water exploratory comparison.

PubMed

Guignard, Brice; Lauer, Jessy; Samozino, Pierre; Mourão, Luis; Vilas-Boas, João Paulo; Rouard, Annie Hélène

2017-12-08

During a horizontal underwater push-off, performance is strongly limited by the presence of water, inducing resistances due to its dense and viscous nature. At the same time, aquatic environments offer a support to the swimmer with the hydrostatic buoyancy counteracting the effects of gravity. Squat jump is a vertical terrestrial push-off with a maximal lower limb extension limited by the gravity force, which attracts the body to the ground. Following this observation, we characterized the effects of environment (water vs. air) on the mechanical characteristics of the leg push-off. Underwater horizontal wall push-off and vertical on-land squat jumps of two local swimmers were evaluated with force plates, synchronized with a lateral camera. To better understand the resistances of the aquatic movement, a quasi-steady Computational Fluid Dynamics (CFD) analysis was performed. The force-, velocity- and power-time curves presented similarities in both environments corresponding to a proximo-distal joints organization. In water, swimmers developed a three-step explosive rise of force, which the first one mainly related to the initiation of body movement. Drag increase, which was observed from the beginning to the end of the push-off, related to the continuous increase of body velocity with high values of drag coefficient (C D ) and frontal areas before take-off. Specifically, with velocity, frontal area was the main drag component to explain inter-individual differences, suggesting that the streamlined position of the lower limbs is decisive to perform an efficient push-off. This study motivates future CFD simulations under more ecological, unsteady conditions. Copyright © 2017 Elsevier Ltd. All rights reserved.

A Conceptual Framework for Inclusive Digital Storytelling to Increase Diversity and Motivation for Cultural Tourism in Thailand.

PubMed

Kasemsarn, Kittichai; Nickpour, Farnaz

2016-01-01

Cultural tourism is considered to be a niche market and little attention has been paid to it, as compared with mass tourism. Moreover, visitors have little motivation to visit actual historical sites and read the story displayed behind the exhibitions. These issues highlight a good opportunity to increase further potential extended tourism and increase the motivation of visitors. To broaden and increase the potential market, this study applies inclusive design principles as 'understanding and designing for diversity' and presents reports on the first study. To increase the motivation of tourists, this study adopts digital storytelling as 'the guideline to increase motivation' and illustrates this in the second study.

Protein export through the bacterial flagellar type III export pathway.

PubMed

Minamino, Tohru

2014-08-01

For construction of the bacterial flagellum, which is responsible for bacterial motility, the flagellar type III export apparatus utilizes both ATP and proton motive force across the cytoplasmic membrane and exports flagellar proteins from the cytoplasm to the distal end of the nascent structure. The export apparatus consists of a membrane-embedded export gate made of FlhA, FlhB, FliO, FliP, FliQ, and FliR and a water-soluble ATPase ring complex consisting of FliH, FliI, and FliJ. FlgN, FliS, and FliT act as substrate-specific chaperones that do not only protect their cognate substrates from degradation and aggregation in the cytoplasm but also efficiently transfer the substrates to the export apparatus. The ATPase ring complex facilitates the initial entry of the substrates into the narrow pore of the export gate. The export gate by itself is a proton-protein antiporter that uses the two components of proton motive force, the electric potential difference and the proton concentration difference, for different steps of the export process. A specific interaction of FlhA with FliJ located in the center of the ATPase ring complex allows the export gate to efficiently use proton motive force to drive protein export. The ATPase ring complex couples ATP binding and hydrolysis to its assembly-disassembly cycle for rapid and efficient protein export cycle. This article is part of a Special Issue entitled: Protein trafficking and secretion in bacteria. Guest Editors: Anastassios Economou and Ross Dalbey. © 2013 Elsevier B.V. All rights reserved.

Leadership Skills.

ERIC Educational Resources Information Center

Hutchison, Cathleen; And Others

1988-01-01

Lists skills identified by the Leadership Development Task Force as being critical skills for a leader. Discussion focuses on information managing skills, including problem solving, decision making, setting goals and objectives; project management; and people managing skills, including interpersonal communications, conflict management, motivation,…

An Approach to Mimicking Abiotic Hydrogenation of Carbon Dioxide in Alkaline Hydrothermal Vents

NASA Astrophysics Data System (ADS)

Wade, L. A.; Fraser, S.; Haile, S.; Collier, P.

2010-04-01

A microfludic approach is considered to determine whether the natural proton-motive and chemiosmotic forces seen in alkaline hydrothermal vents were purely coincidental or if they had a real bearing on how life emerged.

Determination of Dynamic Fracture Toughness Properties of Rail Steels

DOT National Transportation Integrated Search

1987-11-01

Motivated by the occurrence of a long-running rail web fracture in service, dynamic fracture mechanics research was undertaken to (1) quantify the crack driving force due to the residual stresses induced by roller straightening operations, (2) determ...

Chameleon gravity, electrostatics, and kinematics in the outer galaxy

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

Pourhasan, R.; Mann, R.B.; Afshordi, N.

2011-12-01

Light scalar fields are expected to arise in theories of high energy physics (such as string theory), and find phenomenological motivations in dark energy, dark matter, or neutrino physics. However, the coupling of light scalar fields to ordinary (or dark) matter is strongly constrained from laboratory, solar system, and astrophysical tests of the fifth force. One way to evade these constraints in dense environments is through the chameleon mechanism, where the field's mass steeply increases with ambient density. Consequently, the chameleonic force is only sourced by a thin shell near the surface of dense objects, which significantly reduces its magnitude.more » In this paper, we argue that thin-shell conditions are equivalent to ''conducting'' boundary conditions in electrostatics. As an application, we use the analogue of the method of images to calculate the back-reaction (or self-force) of an object around a spherical gravitational source. Using this method, we can explicitly compute the violation of the equivalence principle in the outskirts of galactic haloes (assuming an NFW dark matter profile): Intermediate mass satellites can be slower than their larger/smaller counterparts by as much as 10% close to a thin shell.« less

The drugs industry and peasant self-defence in a Peruvian cocaine enclave.

PubMed

van Dun, Mirella

2012-11-01

This article gives a detailed account of the cocaine industry and the related violence in the Peruvian Upper Huallaga. It is argued that in this cocaine producing region violence increased during state-led forced eradication operations of the coca plants. Most of the violent incidents were closely related to the diminishing cocaine industry, but they were also related to the actions of the state security forces. Instead of receiving support from the state's security apparatus, the population mobilized its own forces to fight the violence. As will be argued, the causes of violence in this cocaine enclave are part of a dynamic interaction amongst many factors - an interaction that is influenced by the local context, a partial state vacuum, and the social utility and the economic advantages of violence. One needs to be aware that motivations of those who engage in the violent behaviour can change over time, as underlying power structures are influenced by changes in local conditions. The study covers an in-depth account of events taking place in the Upper Huallaga during the years 2003-2007. The research material was collected by several ethnographical fieldwork methods. Copyright © 2012 Elsevier B.V. All rights reserved.

Prerequisites and driving forces behind an extended working life among older workers.

PubMed

Hovbrandt, Pia; Håkansson, Carita; Albin, Maria; Carlsson, Gunilla; Nilsson, Kerstin

2017-11-28

Reforms are changing pension systems in many European countries, in order to both restrict early retirement and force people to extend their working life. From occupational therapy and occupational science perspectives, studies focusing on aspects of working life that motivate the older worker is urgent. The aim was to describe incentives behind an extended working life among people over age 65. Focus group methodology was used, with participants ages 66-71, from varying work fields: construction and technical companies and the municipal elderly care sector. Work was considered important and valuable to the degree of how challenging work was, the possibilities for inclusion in a team of colleagues and the chances for better personal finances. Amongst all, the participants expressed a feeling of a strengthened identity by being challenged and having the opportunity to manage working tasks. The finding showed the actual reasons behind an extended working life among older workers. However, a risk of rising social inequity may appear with increased working life if older people are forced to extend their working life due to a difficult financial situation as a pensioner. A variety of retirement options and initiatives in order to support older workers are justified.

Local dynamics and spatiotemporal chaos. The Kuramoto- Sivashinsky equation: A case study

NASA Astrophysics Data System (ADS)

Wittenberg, Ralf Werner

The nature of spatiotemporal chaos in extended continuous systems is not yet well-understood. In this thesis, a model partial differential equation, the Kuramoto- Sivashinsky (KS) equation ut+uxxxx+uxx+uux =0 on a large one-dimensional periodic domain, is studied analytically, numerically, and through modeling to obtain a more detailed understanding of the observed spatiotemporally complex dynamics. In particular, with the aid of a wavelet decomposition, the relevant dynamical interactions are shown to be localized in space and scale. Motivated by these results, and by the idea that the attractor on a large domain may be understood via attractors on smaller domains, a spatially localized low- dimensional model for a minimal chaotic box is proposed. A (de)stabilized extension of the KS equation has recently attracted increased interest; for this situation, dissipativity and analyticity areproven, and an explicit shock-like solution is constructed which sheds light on the difficulties in obtaining optimal bounds for the KS equation. For the usual KS equation, the spatiotemporally chaotic state is carefully characterized in real, Fourier and wavelet space. The wavelet decomposition provides good scale separation which isolates the three characteristic regions of the dynamics: large scales of slow Gaussian fluctuations, active scales containing localized interactions of coherent structures, and small scales. Space localization is shown through a comparison of various correlation lengths and a numerical experiment in which different modes are uncoupled to estimate a dynamic interaction length. A detailed picture of the contributions of different scales to the spatiotemporally complex dynamics is obtained via a Galerkin projection of the KS equation onto the wavelet basis, and an extensive series of numerical experiments in which different combinations of wavelet levels are eliminated or forced. These results, and a formalism to derive an effective equation for periodized subsystems externally forced from a larger system, motivate various models for spatially localized forced systems. There is convincing evidence that short periodized systems, internally forced at the largest scales, form a minimal model for the observed extensively chaotic dynamics in larger domains.

Testing the incentive-sensitization theory with at-risk drinkers: wanting, liking, and alcohol consumption.

PubMed

Ostafin, Brian D; Marlatt, G Alan; Troop-Gordon, Wendy

2010-03-01

Motivational models of addiction typically propose that alcohol and drugs are desired because of their hedonic effects (i.e., increasing pleasure or reducing distress). In contrast, the incentive-sensitization theory proposes that wanting motivation and liking motivation are separable and that after repeated substance use, motivation shifts from liking to wanting. Using a sample of 85 at-risk drinkers (as defined by the National Institute on Alcohol Abuse and Alcoholism), in the current study we examined the separability of liking motivation and wanting motivation for alcohol and whether years of drinking experience was associated with an increased role for wanting motivation and a decreased role for liking motivation. Consumption was measured with a free-drinking task. Wanting motivation was assessed immediately before drinking, and liking was assessed immediately after drinking had begun. The results indicated that (a) wanting motivation predicted variance of consumption unique from that accounted for by liking motivation, (b) longer drinking experience was associated with a decreased relation between liking motivation and consumption, and (c) longer drinking experience was not associated with an increased relation between wanting motivation and consumption. The results provide partial support for the incentive-sensitization theory.

Principles of War for Cyberspace

DTIC Science & Technology

2011-01-15

knowing that relationships between things matter most in the strategy of war . It is essential to examine which tradition is the best guide for...Clausewitzian Cyberthink Clausewitz’s principles of war are based on a western Newtonian view of the world. Clausewitz states war is an act of force...to compel our enemy to do our will, maximum use of force is required, the aim is to disarm the enemy, and the motive of war is the political

Self-forces on static bodies in arbitrary dimensions

NASA Astrophysics Data System (ADS)

Harte, Abraham I.; Flanagan, Éanna É.; Taylor, Peter

2016-06-01

We derive exact expressions for the scalar and electromagnetic self-forces and self-torques acting on arbitrary static extended bodies in arbitrary static spacetimes with any number of dimensions. Nonperturbatively, our results are identical in all dimensions. Meaningful point particle limits are quite different in different dimensions, however. These limits are defined and evaluated, resulting in simple "regularization algorithms" which can be used in concrete calculations. In these limits, self-interaction is shown to be progressively less important in higher numbers of dimensions; it generically competes in magnitude with increasingly high-order extended-body effects. Conversely, we show that self-interaction effects can be relatively large in 1 +1 and 2 +1 dimensions. Our motivations for this work are twofold: First, no previous derivation of the self-force has been provided in arbitrary dimensions, and heuristic arguments presented by different authors have resulted in conflicting conclusions. Second, the static self-force problem in arbitrary dimensions provides a valuable test bed with which to continue the development of general, nonperturbative methods in the theory of motion. Several new insights are obtained in this direction, including a significantly improved understanding of the renormalization process. We also show that there is considerable freedom to use different "effective fields" in the laws of motion—a freedom which can be exploited to optimally simplify specific problems. Different choices give rise to different inertias, gravitational forces, and electromagnetic or scalar self-forces, but there is a sense in which none of these quantities are individually accessible to experiment. Certain combinations are observable, however, and these remain invariant under all possible field redefinitions.

The Trailwatcher: A Collection of Colonel Mike Malone’s Writings

DTIC Science & Technology

1982-06-21

washtub-sized turtle is boat Stand reaches but more brute force. the six eases its noose ’s head and neck. As the noose , the , short on... nebulous term for who would that?" I saw a functions: was constrain them to work on what to be down here won’t like range cards that any told me...the process never ceases. me on now our factor: mot ion. What motivates a of books that have been written on motivation handle on this nebulous term

Improving Acquisition Through Innovation in Workforce Incentives

DTIC Science & Technology

2015-04-30

2013) in “Negative Effects of Extrinsic Rewards on Intrinsic Motivation : More Smoke Than Fire.” The authors have catalogued theories on motivation ...increase total motivation ( extrinsic plus intrinsic). Detrimental effects of extrinsic rewards are not inevitable, and appropriate use of rewards can...increase intrinsic as well as extrinsic motivation . Negative effects on motivation can be averted systematically by clearly understanding and avoiding

Oxygenated-Blood Colour Change Thresholds for Perceived Facial Redness, Health, and Attractiveness

PubMed Central

Re, Daniel E.; Whitehead, Ross D.; Xiao, Dengke; Perrett, David I.

2011-01-01

Blood oxygenation level is associated with cardiovascular fitness, and raising oxygenated blood colouration in human faces increases perceived health. The current study used a two-alternative forced choice (2AFC) psychophysics design to quantify the oxygenated blood colour (redness) change threshold required to affect perception of facial colour, health and attractiveness. Detection thresholds for colour judgments were lower than those for health and attractiveness, which did not differ. The results suggest redness preferences do not reflect a sensory bias, rather preferences may be based on accurate indications of health status. Furthermore, results suggest perceived health and attractiveness may be perceptually equivalent when they are assessed based on facial redness. Appearance-based motivation for lifestyle change can be effective; thus future studies could assess the degree to which cardiovascular fitness increases face redness and could quantify changes in aerobic exercise needed to increase facial attractiveness. PMID:21448270

Oxygenated-blood colour change thresholds for perceived facial redness, health, and attractiveness.

PubMed

Re, Daniel E; Whitehead, Ross D; Xiao, Dengke; Perrett, David I

2011-03-23

Blood oxygenation level is associated with cardiovascular fitness, and raising oxygenated blood colouration in human faces increases perceived health. The current study used a two-alternative forced choice (2AFC) psychophysics design to quantify the oxygenated blood colour (redness) change threshold required to affect perception of facial colour, health and attractiveness. Detection thresholds for colour judgments were lower than those for health and attractiveness, which did not differ. The results suggest redness preferences do not reflect a sensory bias, rather preferences may be based on accurate indications of health status. Furthermore, results suggest perceived health and attractiveness may be perceptually equivalent when they are assessed based on facial redness. Appearance-based motivation for lifestyle change can be effective; thus future studies could assess the degree to which cardiovascular fitness increases face redness and could quantify changes in aerobic exercise needed to increase facial attractiveness.

Improving Temporal Cognition by Enhancing Motivation

PubMed Central

Avlar, Billur; Kahn, Julia B.; Jensen, Greg; Kandel, Eric R.; Simpson, Eleanor H.; Balsam, Peter D.

2015-01-01

Increasing motivation can positively impact cognitive performance. Here we employed a cognitive timing task that allows us to detect changes in cognitive performance that are not influenced by general activity or arousal factors such as the speed or persistence of responding. This approach allowed us to manipulate motivation using three different methods; molecular/genetic, behavioral and pharmacological. Increased striatal D2Rs resulted in deficits in temporal discrimination. Switching off the transgene improved motivation in earlier studies, and here partially rescued the temporal discrimination deficit. To manipulate motivation behaviorally, we altered reward magnitude and found that increasing reward magnitude improved timing in control mice and partially rescued timing in the transgenic mice. Lastly, we manipulated motivation pharmacologically using a functionally selective 5-HT2C receptor ligand, SB242084, which we previously found to increase incentive motivation. SB242084 improved temporal discrimination in both control and transgenic mice. Thus, while there is a general intuitive belief that motivation can affect cognition, we here provide a direct demonstration that enhancing motivation, in a variety of ways, can be an effective strategy for enhancing temporal cognition. Understanding the interaction of motivation and cognition is of clinical significance since many psychiatric disorders are characterized by deficits in both domains. PMID:26371378

Youth motivation as a predictor of treatment outcomes in a community mental health system.

PubMed

Merrill, Brett M; Warren, Jared S; Garcia, Darren J; Hardy, Sam A

2017-03-01

The purpose of this study was to examine the relationship between youth motivation and psychotherapy outcomes in routine community mental health settings. One hundred fifty youth, ages 12-17, from three community mental health clinics completed the Youth Outcome Questionnaire and Treatment Support Measure at frequent intervals over the course of treatment. Increases in motivation followed a curvilinear trajectory. On average, youth motivation significantly increased over the course of therapy according to both self- and parent reports (p < .001). The slope for youth motivation over the course of therapy was negatively associated with the slope for mental health symptoms (p < .001). Initial youth motivation did not predict overall change or the rate of change in symptoms. However, there was significant individual variability in patterns of youth motivation. Our findings demonstrate that youth show increases in motivation over the course of therapy with most gains occurring in the first few sessions. Because increases in motivation over the course of therapy were related to decreases in mental health symptoms, further research is needed to examine how treatment interventions or other factors such as parent motivation may moderate this relationship. Additional research examining the likely complex relationship between initial youth motivation and treatment outcomes in community mental health settings is needed.

Distinct Motivational Effects of Contingent and Noncontingent Rewards.

PubMed

Manohar, Sanjay G; Finzi, Rebecca Dawn; Drew, Daniel; Husain, Masud

2017-07-01

When rewards are available, people expend more energy, increasing their motivational vigor. In theory, incentives might drive behavior for two distinct reasons: First, they increase expected reward; second, they increase the difference in subjective value between successful and unsuccessful performance, which increases contingency-the degree to which action determines outcome. Previous studies of motivational vigor have never compared these directly. Here, we indexed motivational vigor by measuring the speed of eye movements toward a target after participants heard a cue indicating how outcomes would be determined. Eye movements were faster when the cue indicated that monetary rewards would be contingent on performance than when the cue indicated that rewards would be random. But even when the cue indicated that a reward was guaranteed regardless of speed, movement was still faster than when no reward was available. Motivation by contingent and certain rewards was uncorrelated across individuals, which suggests that there are two separable, independent components of motivation. Contingent motivation generated autonomic arousal, and unlike noncontingent motivation, was effective with penalties as well as rewards.

Evaluation of transradial body-powered prostheses using a robotic simulator.

PubMed

Ayub, Rafi; Villarreal, Dario; Gregg, Robert D; Gao, Fan

2017-04-01

Transradial body-powered prostheses are extensively used by upper-limb amputees. This prosthesis requires large muscle forces and great concentration by the patient, often leading to discomfort, muscle fatigue, and skin breakdown, limiting the capacity of the amputee to conduct daily activities. Since body-powered prostheses are commonplace, understanding their optimal operation to mitigate these drawbacks would be clinically meaningful. To find the optimal operation of the prosthesis where the activation force is minimized and the grip force is maximized. Experimental design. A computer-controlled robotic amputee simulator capable of rapidly testing multiple elbow, shoulder, and scapular combinations of the residual human arm was constructed. It was fitted with a transradial prosthesis and used to systematically test multiple configurations. We found that increased shoulder flexion, scapular abduction, elbow extension, and the placement of the ring harness near the vertebra C7 correlate with higher gripper operation efficiency, defined as the ratio of grip force to cable tension. We conclude that force transmission efficiency is closely related to body posture configuration. These results could help guide practitioners in clinical practice as well as motivate future studies in optimizing the operation of a body-powered prosthesis. Clinical relevance The results from this study suggest that clinicians ought to place the ring harness inferior and to the sound side of the vertebra prominens in order to maximize grip efficiency. The results will also help clinicians better instruct patients in body posture during prosthesis operation to minimize strain.

Sexual selection and the opportunity cost of free mate choice.

PubMed

Apostolou, Menelaos

2016-06-01

The model of sexual selection under parental choice has been proposed to account for the control that parents exercise over their children's mating decisions. The present paper attempts to formalize and advance this model with the purpose of providing a better understanding of how parental choice mandates the course of sexual selection. In particular, in the proposed formulation, free mate choice involves an opportunity cost which motivates parents to place their children's mate choices under their control. When they succeed in doing so, they become a significant sexual selection force, as traits that appeal to parents in an in-law are selected and increase in frequency in the population. The degree of parental control over mating, and thus the strength of sexual selection under parental choice, is positively predicted by the size of the opportunity cost of free mate choice. The primary factors that affect the level of opportunity cost vary between society types, affecting the strength of parental choice as a sexual selection force.

Vortex dynamics in a thin superconducting film with a non-uniform magnetic field applied at its center with a small coil

DOE PAGES

Lemberger, Thomas R.; Loh, Yen Lee

2016-10-27

This article models the dynamics of vortices that are generated in the middle of a thin, large-area, superconducting film by a low-frequency magnetic field from a small coil, motivated by a desire to better understand measurements of the superconducting coherence length made with a two-coil apparatus. When the applied field exceeds a critical value, vortices and antivortices originate near the middle of the film at the radius where the Lorentz force of the screening supercurrent is largest. The Lorentz force from the screening supercurrent pushes vortices toward the center of the film and antivortices outward. In an experiment, vortices aremore » detected as an increase in mutual inductance between drive coil and a coaxial “pickup” coil on the opposite side of the film. Lastly, the model shows that the essential features of measurements are well described when vortex pinning and the attendant hysteresis are included.« less

Primary healthcare nurses' experiences with motivational interviewing in health promotion practice.

PubMed

Brobeck, Elisabeth; Bergh, Håkan; Odencrants, Sigrid; Hildingh, Cathrine

2011-12-01

The aim of the study was to describe primary healthcare nurses' experiences with motivational interviewing as a method for health promotion practice. A person's lifestyle has a major effect on his or her health. Motivational interviewing is one way of working with lifestyle changes in health promotion practice. The basic plan of motivational interviewing is to help people understand their lifestyle problems and make positive lifestyle changes. Motivational interviewing has been proven to be more effective than conventional methods in increasing patient motivation. This study has a descriptive design and uses a qualitative method. Twenty nurses who worked in primary health care and actively used motivational interviewing in their work were interviewed. Qualitative content analysis was used to process the data. The primary healthcare nurses' experiences with motivational interviewing as a method of health promotion practice demonstrate that motivational interviewing is a demanding, enriching and useful method that promotes awareness and guidance in the care relationship. The results also show that motivational interviewing is a valuable tool for primary healthcare nurses' health promotion practice. This study shows that motivational interviewing places several different demands on nurses who use this method. Those who work with motivational interviewing must make an effort to incorporate this new method to avoid falling back into the former practice of simply giving advice. Maintaining an open mind while implementing motivational interviewing in real healthcare settings is crucial for nurses to increase this method's effectiveness. The nurses in the study had a positive experience with motivational interviewing, which can contribute to the increased use, adaption and development of motivational interviewing among primary healthcare professionals. Increased motivational interviewing knowledge and skills would also contribute to promotion of health lifestyle practices. © 2011 Blackwell Publishing Ltd.

Motivational Text Message Intervention for Eating Disorders: A Single-Case Alternating Treatment Design Using Ecological Momentary Assessment.

PubMed

Shingleton, Rebecca M; Pratt, Elizabeth M; Gorman, Bernard; Barlow, David H; Palfai, Tibor P; Thompson-Brenner, Heather

2016-05-01

This study tested a motivational text message treatment adjunct for individuals with eating disorders (EDs) who exhibited high dietary restraint/restriction. A replicated single-case alternating treatment design was used to examine (a) the feasibility of combining a brief motivational interview with subsequent text messages and (b) the influence of the text messages on eating behaviors and motivation to change in individuals with EDs (N=12). The protocol was 8weeks and the text messages were adjunctive to cognitive-behavioral therapy. The intervention was well accepted (mean rating=7/10) and feasible within the context of monetary compensation (mean daily monitoring compliance =91%). Text messages did not impact behavioral outcomes: dietary restraint and kilocalorie intake. They had mixed effects on motivation to change dietary restraint, measured by the Readiness and Motivation Questionnaire (RMQ). When receiving text messages, RMQ precontemplation scores (desire to restrict) significantly increased, indicating decreased motivation; however, action scores (effort toward reducing dietary restraint) significantly increased, indicating increased motivation. These effects were moderated by weight status. Underweight individuals (n=4; body mass index [BMI]<19.0) reported increased ambivalence-that is, an increased desire to restrict and increased action toward reducing restriction-in response to the text messages. Normal weight participants (n=8; BMI>19.0) reported only increased action toward reducing restriction in response to the text messages. These data demonstrate text messages are a potentially feasible and acceptable treatment adjunct and may be effective at increasing motivation to change for normal weight individuals, while their influence on underweight patients is more complex. These findings provide a foundation for future research in technology-based motivational interventions for EDs and offer preliminary evidence for using these methods among normal weight individuals. Copyright © 2016. Published by Elsevier Ltd.

GeoFORCE Texas: An Outreach Program that is Increasing the Number and Diversity of Students Completing STEM Degrees and Entering the Workforce

NASA Astrophysics Data System (ADS)

Snow, E.; Moore, S. L.

2014-12-01

GeoFORCE Texas is an outreach program of the Jackson School of Geosciences, University of Texas at Austin. Established in 2005 with the goal of increasing the number and diversity of students studying geosciences and engineering and entering the high-tech workforce, GeoFORCE has been highly successful. Key elements to that success will be presented here. GeoFORCE targets bright students in rural and inner-city schools where they are generally not academically challenged. Every summer throughout high school we take them on geologic field trips all over the country. In 2014, GeoFORCE led 15 field academies for about 600 students. The program is rigorous and academic. We emphasize college-level thinking skills. Because it is a 4-year program, they have a pretty good grounding in physical geology by the time they graduate. More importantly, they develop confidence in their ability to handle college, and a strong motivation to earn a college degree. GeoFORCE students are mostly minority (85%) and more than half will be the first in their family to graduate from college. GeoFORCE students exceed national averages in rates of going to college (97%), majoring in STEM fields (66%), majoring in geosciences (15%) and engineering (13%), and graduating from college (~85%). GeoFORCE is a public/private partnership and a workforce-focused program. The Jackson School funds staff and operating expenses (37%). Money for student programs comes from private industry (44%), state and federal grants (14%), and foundations and individual donors (5%). Our corporate partners are in the energy sector. In addition to funding, corporate sponsors attend the summer field programs, mentor GeoFORCE students, and provide opportunities for the students to visit the companies. As our students move toward college graduation, our industry and government partners have begun to hire them as interns. GeoFORCE graduates are now entering the workforce. Our first two cohorts are 4 and 5 years past high school graduation. That group of 155 students boasts 70 college graduates and another 60 still pursuing degrees. There are 19 geoscience majors and 9 engineers. They are also contributing to the body of science with a growing list of publications, including at least one at this meeting.

IN SITU SOIL VAPOR EXTRACTION TREATMENT

EPA Science Inventory

Soil vapor extraction (SVE) is designed to physically remove volatile compounds, generally from the vadose or unsaturated zone. t is an in situ process employing vapor extraction wells alone or in combination with air injection wells. acuum blowers supply the motive force, induci...

Motivating employees through incentives: productive or a counterproductive strategy.

PubMed

Qayum, Mehran; Sawal, Shefa Haider; Khan, Hassan Mehmood

2014-05-01

The disparity between human resource in health and provision of health services is a growing concern worldwide. Many developing countries are facing this crisis and therefore human resource in health is considered a high priority on their agenda.This imbalance between supplies of human resource is exacerbated by migration of health workers in many countries. Understanding the motivational factor is an important aspect to retain the migrating health workforce. This paper analyses the role of financial and non financial incentives in motivating the health work force. A review of available literature was conducted to understand the role of motivational factor in retaining health workforce. A review of current literature found that an incentive plays a key role in motivating a health worker. Financial incentives are useful in improving the compliance to standard policies and procedures. Comprehensive integrated incentive system approach should be established to develop a sustainable health workforce with required skill. Likewise monetary incentives should be linked to adherence to provincial and national guidelines and procedures. Sustainability could be ensured by commitment of government, political will and involvement of key stakeholders and decision makers.

Reduced evoked fos expression in activity-related brain regions in animal models of behavioral depression.

PubMed

Stone, Eric A; Lehmann, Michael L; Lin, Yan; Quartermain, David

2007-08-15

A previous study showed that two mouse models of behavioral depression, immune system activation and depletion of brain monoamines, are accompanied by marked reductions in stimulated neural activity in brain regions involved in motivated behavior. The present study tested whether this effect is common to other depression models by examining the effects of repeated forced swimming, chronic subordination stress or acute intraventricular galanin injection - three additional models - on baseline or stimulated c-fos expression in several brain regions known to be involved in motor or motivational processes (secondary motor, M2, anterior piriform cortex, APIR, posterior cingulate gyrus, CG, nucleus accumbens, NAC). Each of the depression models was found to reduce the fos response stimulated by exposure to a novel cage or a swim stress in all four of these brain areas but not to affect the response of a stress-sensitive region (paraventricular hypothalamus, PVH) that was included for control purposes. Baseline fos expression in these structures was either unaffected or affected in an opposite direction to the stimulated response. Pretreatment with either desmethylimipramine (DMI) or tranylcypromine (tranyl) attenuated these changes. It is concluded that the pattern of a reduced neural function of CNS motor/motivational regions with an increased function of stress areas is common to 5 models of behavioral depression in the mouse and is a potential experimental analog of the neural activity changes occurring in the clinical condition.

Do Responses to Different Anthropogenic Forcings Add Linearly in Climate Models?

NASA Technical Reports Server (NTRS)

Marvel, Kate; Schmidt, Gavin A.; Shindell, Drew; Bonfils, Celine; LeGrande, Allegra N.; Nazarenko, Larissa; Tsigaridis, Kostas

2015-01-01

Many detection and attribution and pattern scaling studies assume that the global climate response to multiple forcings is additive: that the response over the historical period is statistically indistinguishable from the sum of the responses to individual forcings. Here, we use the NASA Goddard Institute for Space Studies (GISS) and National Center for Atmospheric Research Community Climate System Model (CCSM) simulations from the CMIP5 archive to test this assumption for multi-year trends in global-average, annual-average temperature and precipitation at multiple timescales. We find that responses in models forced by pre-computed aerosol and ozone concentrations are generally additive across forcings; however, we demonstrate that there are significant nonlinearities in precipitation responses to di?erent forcings in a configuration of the GISS model that interactively computes these concentrations from precursor emissions. We attribute these to di?erences in ozone forcing arising from interactions between forcing agents. Our results suggest that attribution to specific forcings may be complicated in a model with fully interactive chemistry and may provide motivation for other modeling groups to conduct further single-forcing experiments.

Do responses to different anthropogenic forcings add linearly in climate models?

DOE PAGES

Marvel, Kate; Schmidt, Gavin A.; Shindell, Drew; ...

2015-10-14

Many detection and attribution and pattern scaling studies assume that the global climate response to multiple forcings is additive: that the response over the historical period is statistically indistinguishable from the sum of the responses to individual forcings. Here, we use the NASA Goddard Institute for Space Studies (GISS) and National Center for Atmospheric Research Community Climate System Model (CCSM4) simulations from the CMIP5 archive to test this assumption for multi-year trends in global-average, annual-average temperature and precipitation at multiple timescales. We find that responses in models forced by pre-computed aerosol and ozone concentrations are generally additive across forcings. However,more » we demonstrate that there are significant nonlinearities in precipitation responses to different forcings in a configuration of the GISS model that interactively computes these concentrations from precursor emissions. We attribute these to differences in ozone forcing arising from interactions between forcing agents. Lastly, our results suggest that attribution to specific forcings may be complicated in a model with fully interactive chemistry and may provide motivation for other modeling groups to conduct further single-forcing experiments.« less

Macro-level social forces and micro-level consequences: poverty, alternate occupations, and drug dealing.

PubMed

Dunlap, Eloise; Johnson, Bruce D; Kotarba, Joseph A; Fackler, Jennifer L

2010-01-01

This article is an empirical examination of the ways in which macro-level social forces have had micro-level consequences in the New Orleans drug market. The article illustrates a clear connection between poverty and entrance into the drug market, as mitigated by race, lack of societal opportunity, lack of social capital, distressed families, and closed neighborhoods. Specifically, the research illustrates the mechanisms by which macro-level social forces intersect to legitimize drug dealing as a viable alternative method of acquiring money and social capital. These intersecting macro-level social forces, such as poverty, race, family structure, and neighborhood characteristics, ultimately constrain the life chances of those living in the inner city irrespective of personal traits, individual motivations, or private achievements.

Life-space foam: A medium for motivational and cognitive dynamics

NASA Astrophysics Data System (ADS)

Ivancevic, Vladimir; Aidman, Eugene

2007-08-01

General stochastic dynamics, developed in a framework of Feynman path integrals, have been applied to Lewinian field-theoretic psychodynamics [K. Lewin, Field Theory in Social Science, University of Chicago Press, Chicago, 1951; K. Lewin, Resolving Social Conflicts, and, Field Theory in Social Science, American Psychological Association, Washington, 1997; M. Gold, A Kurt Lewin Reader, the Complete Social Scientist, American Psychological Association, Washington, 1999], resulting in the development of a new concept of life-space foam (LSF) as a natural medium for motivational and cognitive psychodynamics. According to LSF formalisms, the classic Lewinian life space can be macroscopically represented as a smooth manifold with steady force fields and behavioral paths, while at the microscopic level it is more realistically represented as a collection of wildly fluctuating force fields, (loco)motion paths and local geometries (and topologies with holes). A set of least-action principles is used to model the smoothness of global, macro-level LSF paths, fields and geometry. To model the corresponding local, micro-level LSF structures, an adaptive path integral is used, defining a multi-phase and multi-path (multi-field and multi-geometry) transition process from intention to goal-driven action. Application examples of this new approach include (but are not limited to) information processing, motivational fatigue, learning, memory and decision making.

Modeling of the motion of the actin filament on the myosin motility assays

NASA Astrophysics Data System (ADS)

Young, Yuan; Shelley, Mike

2007-11-01

In motility assays, cytoskeletal actin filaments (actin filaments) glide over a surface coated with motor proteins, and the different modes of motion provide a simple measure of the force exerted by the motor proteins (Bourdieu, 1995). Motivated by these experiments, we consider the actin filament as a slender, elastic filament immersed in Stokesian flow, driven by a tangential forcing that mimics the force by the motor proteins. We find qualitative agreement on several points between our analysis and simulations and experimental observations. Furthermore, we study the correlation between filament transport and the characteristics of motion with the spatial pattern of motor protein density.

[Role of proton-motive force in the conjugative DNA transport in Staphylococci].

PubMed

Gavriliuk, V G; Vinnikov, A I

1997-01-01

Sensitivity of the conjugative process in staphylococci to the action of uncouplers of oxidative phosphorylation and inhibitors of electron transport systems have been proved, that testifies to the energy-dependent character of conjugative transport of DNA. Proceeding of the conjugation process depends upon the generation of delta microH+ on the membrane of both the donor and recipient cells. contribution of protonmotive forces to providing for the transfer of plasmids during conjugation to staphylococci has been defined.

Distributed Operations: The Way Forward

DTIC Science & Technology

2007-01-01

those recruits who participated in physical-type sports – boxing, football, rugby , and wrestling – and have a desire for aggressive competition and...Operating Forces, Marines would be imbued with a thorough knowledge of basic infantry skills. Today’s infantry Marine is motivated , willing, and

The Population Boom in Rural America.

ERIC Educational Resources Information Center

Wilvert, Calvin H.

1980-01-01

Explores the recent demographic and settlement trend toward city to rural area migration. Topics discussed include population influx to the Sunbelt, motivations and characterizations of the migrants, forces that encourage people to seek an alternative to urban life, and classroom relevance of the migration. (DB)

An Assessment of Team Development at the Air Force Flight Dynamics Laboratory.

DTIC Science & Technology

1979-09-01

criterion variables: employee job satisfaction; job motivation; absenteeism ; five factor dimensions of organizational climate; and for Scientists and...Engineers (S and Es), three productivity factors. All variables except absenteeism were measured with a questionnaire. Absenteeism data was obtained from

Implementation of the physician assistant in Dutch health care organizations: primary motives and outcomes.

PubMed

van Vught, Anneke J A H; van den Brink, Geert T W J; Wobbes, Theo

2014-01-01

Physician assistants (PAs) are trained to perform medical procedures that were traditionally performed by medical physicians. Physician assistants seem to be deployed not only to increase efficiency but also to ensure the quality of care. What is not known is the primary motive for employing PAs within Dutch health care and whether the employment of the PAs fulfills the perceived need for them. Supervising medical specialists who used PAs in their practices were interviewed about their primary motives and outcomes. The interviews were semistructured. Two scientists coded the findings with respect to motives and outcomes. In total, 55 specialists were interviewed about their motives for employing a PA, and 15 were interviewed about the outcomes of employing a PA. With respect to the primary motives for employing a PA, the most frequent motive was to increase continuity and quality of care, followed by relieving the specialist's workload, increasing efficiency of care, and substituting for medical residents. The outcomes were found to be consistent with the motives. In conclusion, the primary motive for employing a PA in Dutch health care is to increase continuity and quality of care.

Enhancing Congruence between Implicit Motives and Explicit Goal Commitments: Results of a Randomized Controlled Trial.

PubMed

Roch, Ramona M; Rösch, Andreas G; Schultheiss, Oliver C

2017-01-01

Objective: Theory and research suggest that the pursuit of personal goals that do not fit a person's affect-based implicit motives results in impaired emotional well-being, including increased symptoms of depression. The aim of this study was to evaluate an intervention designed to enhance motive-goal congruence and study its impact on well-being. Method: Seventy-four German students (mean age = 22.91, SD = 3.68; 64.9% female) without current psychopathology, randomly allocated to three groups: motivational feedback (FB; n = 25; participants learned about the fit between their implicit motives and explicit goals), FB + congruence-enhancement training (CET; n = 22; participants also engaged in exercises to increase the fit between their implicit motives and goals), and a no-intervention control group ( n = 27), were administered measures of implicit motives, personal goal commitments, happiness, depressive symptoms, and life satisfaction 3 weeks before (T1) and 6 weeks after (T2) treatment. Results: On two types of congruence measures derived from motive and goal assessments, treated participants showed increases in agentic (power and achievement) congruence, with improvements being most consistent in the FB+CET group. Treated participants also showed a trend-level depressive symptom reduction, but no changes on other well-being measures. Although increases in overall and agentic motivational congruence were associated with increases in affective well-being, treatment-based reduction of depressive symptoms was not mediated by treatment-based agentic congruence changes. Conclusion: These findings document that motivational congruence can be effectively enhanced, that changes in motivational congruence are associated with changes in affective well-being, and they suggest that individuals' implicit motives should be considered when personal goals are discussed in the therapeutic process.

Enhancing Congruence between Implicit Motives and Explicit Goal Commitments: Results of a Randomized Controlled Trial

PubMed Central

Roch, Ramona M.; Rösch, Andreas G.; Schultheiss, Oliver C.

2017-01-01

Objective: Theory and research suggest that the pursuit of personal goals that do not fit a person's affect-based implicit motives results in impaired emotional well-being, including increased symptoms of depression. The aim of this study was to evaluate an intervention designed to enhance motive-goal congruence and study its impact on well-being. Method: Seventy-four German students (mean age = 22.91, SD = 3.68; 64.9% female) without current psychopathology, randomly allocated to three groups: motivational feedback (FB; n = 25; participants learned about the fit between their implicit motives and explicit goals), FB + congruence-enhancement training (CET; n = 22; participants also engaged in exercises to increase the fit between their implicit motives and goals), and a no-intervention control group (n = 27), were administered measures of implicit motives, personal goal commitments, happiness, depressive symptoms, and life satisfaction 3 weeks before (T1) and 6 weeks after (T2) treatment. Results: On two types of congruence measures derived from motive and goal assessments, treated participants showed increases in agentic (power and achievement) congruence, with improvements being most consistent in the FB+CET group. Treated participants also showed a trend-level depressive symptom reduction, but no changes on other well-being measures. Although increases in overall and agentic motivational congruence were associated with increases in affective well-being, treatment-based reduction of depressive symptoms was not mediated by treatment-based agentic congruence changes. Conclusion: These findings document that motivational congruence can be effectively enhanced, that changes in motivational congruence are associated with changes in affective well-being, and they suggest that individuals' implicit motives should be considered when personal goals are discussed in the therapeutic process. PMID:28955267

Beyond-proximity-force-approximation Casimir force between two spheres at finite temperature

NASA Astrophysics Data System (ADS)

Bimonte, Giuseppe

2018-04-01

A recent experiment [J. L. Garrett, D. A. T. Somers, and J. N. Munday, Phys. Rev. Lett. 120, 040401 (2018), 10.1103/PhysRevLett.120.040401] measured for the first time the gradient of the Casimir force between two gold spheres at room temperature. The theoretical analysis of the data was carried out using the standard proximity force approximation (PFA). A fit of the data, using a parametrization of the force valid for the sphere-plate geometry, was used by the authors to place a bound on deviations from PFA. Motivated by this work, we compute the Casimir force between two gold spheres at finite temperature. The semianalytic formula for the Casimir force that we construct is valid for all separations, and can be easily used to interpret future experiments in both the sphere-plate and sphere-sphere configurations. We describe the correct parametrization of the corrections to PFA for two spheres that should be used in data analysis.

Motivating Students by Increasing Student Choice

ERIC Educational Resources Information Center

Birdsell, Becky S.; Ream, Sarah M.; Seyller, Ann M.; Zobott, Pam L.

2009-01-01

The purpose of this study was to increase motivation in 7th grade students. Four teacher researchers examined the change in motivational levels as a result of choice strategies. They gathered data from four different classes, 101 students in all, to track levels of motivation. They monitored their levels of observable behavioral patterns with a…

Distinct Motivational Effects of Contingent and Noncontingent Rewards

PubMed Central

Manohar, Sanjay G.; Finzi, Rebecca Dawn; Drew, Daniel; Husain, Masud

2017-01-01

When rewards are available, people expend more energy, increasing their motivational vigor. In theory, incentives might drive behavior for two distinct reasons: First, they increase expected reward; second, they increase the difference in subjective value between successful and unsuccessful performance, which increases contingency—the degree to which action determines outcome. Previous studies of motivational vigor have never compared these directly. Here, we indexed motivational vigor by measuring the speed of eye movements toward a target after participants heard a cue indicating how outcomes would be determined. Eye movements were faster when the cue indicated that monetary rewards would be contingent on performance than when the cue indicated that rewards would be random. But even when the cue indicated that a reward was guaranteed regardless of speed, movement was still faster than when no reward was available. Motivation by contingent and certain rewards was uncorrelated across individuals, which suggests that there are two separable, independent components of motivation. Contingent motivation generated autonomic arousal, and unlike noncontingent motivation, was effective with penalties as well as rewards. PMID:28488927

Are the Motivational Effects of Autonomy-Supportive Conditions Universal? Contrasting Results Among Indians and Americans.

PubMed

Tripathi, Ritu; Cervone, Daniel; Savani, Krishna

2018-04-01

In Western theories of motivation, autonomy is conceived as a universal motivator of human action; enhancing autonomy is expected to increase motivation panculturally. Using a novel online experimental paradigm that afforded a behavioral measure of motivation, we found that, contrary to this prevailing view, autonomy cues affect motivation differently among American and Indian corporate professionals. Autonomy-supportive instructions increased motivation among Americans but decreased motivation among Indians. The motivational Cue × Culture interaction was extraordinarily large; the populations exhibited little statistical overlap. A second study suggested that this interaction reflects culturally specific norms that are widely understood by members of the given culture. When evaluating messages to motivate workers, Indians, far more than Americans, preferred a message invoking obligations to one invoking autonomous personal choice norms. Results cast doubt on the claim, made regularly in both basic and applied psychology, that enhancing autonomy is a universally preferred method for boosting motivation.

Differentiation between electron transport sensing and proton motive force sensing by the Aer and Tsr receptors for aerotaxis

PubMed Central

Edwards, Jessica C.; Johnson, Mark S.; Taylor, Barry L.

2007-01-01

SUMMARY Aerotaxis (oxygen-seeking) behavior in Escherichia coli is a response to changes in the electron transport system and not oxygen per se. Because changes in proton motive force (PMF) are coupled to respiratory electron transport, it is difficult to differentiate between PMF, electron transport or redox, all primary candidates for the signal sensed by the aerotaxis receptors, Aer and Tsr. We constructed electron transport mutants that produced different respiratory H+/e- stoichiometries. These strains expressed binary combinations of one NADH dehydrogenase and one quinol oxidase. We then introduced either an aer or tsr mutation into each mutant to create two sets of electron transport mutants. In vivo H+/e- ratios for strains grown in glycerol medium ranged from 1.46 ± 0.18 to 3.04 ± 0.47, but rates of respiration and growth were similar. The PMF jump in response to oxygen was proportional to the H+/e- ratio in each set of mutants (r2 = 0.986 to 0.996). The length of Tsr-mediated aerotaxis responses increased with the PMF jump (r2 = 0.988), but Aer-mediated responses did not correlate with either PMF changes (r2 = 0.297) or the rate of electron transport (r2 = 0.066). Aer-mediated responses were linked to NADH dehydrogenase I, although there was no absolute requirement. The data indicate that Tsr responds to changes in PMF, but strong Aer responses to oxygen are associated with redox changes in NADH dehydrogenase I PMID:16995896

The interactive roles of mastery climate and performance climate in predicting intrinsic motivation.

PubMed

Buch, R; Nerstad, C G L; Säfvenbom, R

2017-02-01

This study examined the interplay between perceived mastery and performance climates in predicting increased intrinsic motivation. The results of a two-wave longitudinal study comprising of 141 individuals from three military academies revealed a positive relationship between a perceived mastery climate and increased intrinsic motivation only for individuals who perceived a low performance climate. This finding suggests a positive relationship between a perceived mastery climate and increased intrinsic motivation only when combined with low perceptions of a performance climate. Hence, introducing a performance climate in addition to a mastery climate can be an undermining motivational strategy, as it attenuates the positive relationship between a mastery climate and increased intrinsic motivation. Implications for future research and practice are discussed. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

Persistence motives in irrational decisions to complete a boring task.

PubMed

Halkjelsvik, Torleif; Rise, Jostein

2015-01-01

We explored a novel task paradigm where participants from the online work marketplace Amazon Mechanical Turk were given the choice to quit or continue an unfinished boring task for identical economic rewards. In Studies 1a and 1b, about half the participants chose to continue (corresponding to an average of 55 and 35 cents in foregone earnings). Participants' self-reported reasons for continuing involved various types of persistence motives, reflecting a desire to persist or complete per se. Studies 2, 3a, 3b, and 3c ruled out the possibility that people continued because they enjoyed the task or believed there were additional rewards for continuing. Study 4 showed that the choice to quit/continue was associated with the manner in which the choice was presented (persistence test vs. decision-making test) and individual differences in dispositional persistence motives. The present data indicate that motivational forces independent of the focal reward may affect intertemporal decisions. © 2014 by the Society for Personality and Social Psychology, Inc.

Using a medical volunteer program to motivate medical freshmen.

PubMed

Na, Beag Ju; Hur, Yera; Yun, Jungmin; Kang, Jaegu; Han, Seungyeon; Whang, Wonmin; Lee, Keumho; Lee, Jungmin

2013-09-01

A task force identified 4 core properties of motivation-related improvement and developed a medical volunteer program for 63 medical freshmen in 2012. Three overarching topics were examined: What were the contents of the program? Did students' motivation improve? Were the students satisfied with the course? Pretest and posttest motivation levels and program evaluation forms were analyzed. We organized a series of committee meetings and identified 4 core factors of motivation. The program was conducted for 63 medical freshmen in March 2012. The program evaluation form was analyzed using SPSS 17.0. The core factors of motivation were interest in medical studies, volunteer-mindedness, medical humanities, and self-management. The program was composed of lectures, medical volunteer hours, and program evaluation and feedback sessions. Students' motivation differed significantly with regard to interest in medical studies (t=-2.40, p=0.020) and volunteer-mindedness (t=-3.45, p=0.001). Ninety percent of students were satisfied with the program, 67.8% of students were satisfied with the medical volunteer activity, and the feedback session of the program was meaningful (66.1%). The medical volunteer program, held in the first month of the medical education year, was meaningful, but the reasons for dissatisfaction with the program should be examined. We should also develop a system that has lasting beneficial effects on academic achievement and career selection.

Temporal associations between individual changes in hormones, training motivation and physical performance in elite and non-elite trained men.

PubMed

Crewther, B T; Carruthers, J; Kilduff, L P; Sanctuary, C E; Cook, C J

2016-09-01

To advance our understanding of the hormonal contribution to athletic performance, we examined the temporal associations between individual changes in testosterone (T) and/or cortisol (C) concentrations, training motivation and physical performance in elite and non-elite trained men. Two male cohorts classified as elites (n = 12) and non-elites (n = 12) completed five testing sessions over a six-week period. The athletes were tested for salivary T, C, T/C ratio, self-perceived training motivation, countermovement jump (CMJ) height and isometric mid-thigh pull peak force (IMTP PF), after which an actual training workout was performed. The elite men reported higher motivation to train and they produced greater CMJ height overall, whereas the non-elites had higher pooled T levels (p < 0.05). No significant group differences in C concentrations, T/C ratio or IMTP PF were found. The individual changes in T levels were positively associated with training motivation in the elite men only (p = 0.033), but the hormonal and motivation measures did not predict CMJ height or IMTP PF in either group. The monitoring of elite and non-elite men across a short training block revealed differences in T levels, motivation and lower-body power, which may reflect training and competitive factors in each group. Despite having lower T levels, the elite athletes showed better linkage between pre-training T fluctuations and subsequent motivation to train. The nature of the performance tests (i.e. single repetition trials) could partly explain the lack of an association with the hormonal and motivational measures.

Temporal associations between individual changes in hormones, training motivation and physical performance in elite and non-elite trained men

PubMed Central

Carruthers, J; Kilduff, LP; Sanctuary, CE; Cook, CJ

2016-01-01

To advance our understanding of the hormonal contribution to athletic performance, we examined the temporal associations between individual changes in testosterone (T) and/or cortisol (C) concentrations, training motivation and physical performance in elite and non-elite trained men. Two male cohorts classified as elites (n = 12) and non-elites (n = 12) completed five testing sessions over a six-week period. The athletes were tested for salivary T, C, T/C ratio, self-perceived training motivation, countermovement jump (CMJ) height and isometric mid-thigh pull peak force (IMTP PF), after which an actual training workout was performed. The elite men reported higher motivation to train and they produced greater CMJ height overall, whereas the non-elites had higher pooled T levels (p < 0.05). No significant group differences in C concentrations, T/C ratio or IMTP PF were found. The individual changes in T levels were positively associated with training motivation in the elite men only (p = 0.033), but the hormonal and motivation measures did not predict CMJ height or IMTP PF in either group. The monitoring of elite and non-elite men across a short training block revealed differences in T levels, motivation and lower-body power, which may reflect training and competitive factors in each group. Despite having lower T levels, the elite athletes showed better linkage between pre-training T fluctuations and subsequent motivation to train. The nature of the performance tests (i.e. single repetition trials) could partly explain the lack of an association with the hormonal and motivational measures. PMID:27601775

Influence of virtual reality soccer game on walking performance in robotic assisted gait training for children.

PubMed

Brütsch, Karin; Schuler, Tabea; Koenig, Alexander; Zimmerli, Lukas; -Koeneke, Susan Mérillat; Lünenburger, Lars; Riener, Robert; Jäncke, Lutz; Meyer-Heim, Andreas

2010-04-22

Virtual reality (VR) offers powerful therapy options within a functional, purposeful and motivating context. Several studies have shown that patients' motivation plays a crucial role in determining therapy outcome. However, few studies have demonstrated the potential of VR in pediatric rehabilitation. Therefore, we developed a VR-based soccer scenario, which provided interactive elements to engage patients during robotic assisted treadmill training (RAGT). The aim of this study was to compare the immediate effect of different supportive conditions (VR versus non-VR conditions) on motor output in patients and healthy control children during training with the driven gait orthosis Lokomat*. A total of 18 children (ten patients with different neurological gait disorders, eight healthy controls) took part in this study. They were instructed to walk on the Lokomat in four different, randomly-presented conditions: (1) walk normally without supporting assistance, (2) with therapists' instructions to promote active participation, (3) with VR as a motivating tool to walk actively and (4) with the VR tool combined with therapists' instructions. The Lokomat gait orthosis is equipped with sensors at hip and knee joint to measure man-machine interaction forces. Additionally, subjects' acceptance of the RAGT with VR was assessed using a questionnaire. The mixed ANOVA revealed significant main effects for the factor CONDITIONS (p < 0.001) and a significant interaction CONDITIONS x GROUP (p = 0.01). Tests of between-subjects effects showed no significant main effect for the GROUP (p = 0.592). Active participation in patients and control children increased significantly when supported and motivated either by therapists' instructions or by a VR scenario compared with the baseline measurement "normal walking" (p < 0.001). The VR scenario used here induces an immediate effect on motor output to a similar degree as the effect resulting from verbal instructions by the therapists. Further research needs to focus on the implementation of interactive design elements, which keep motivation high across and beyond RAGT sessions, especially in pediatric rehabilitation.

Chronic aerial exposure to glucorticoids or beta-agonists affects avoidance learning and exploratory motivation in rats.

PubMed

Elías, Pedro C; Sagua, Delia; Alvarez, Edgardo O

2004-02-04

The purpose of the present work was to examine if the conventional asthma treatments in humans (inhalation of glucocorticoids or beta-agonists, administered in a chronic regimen) might affect behavioral processes (learning and exploratory motivation) in rats. Adult male rats were exposed to an atmosphere saturated with either saline, budesonide (a glucocorticoid), or salbutamol (a beta-adrenergic receptor agonist) in a forced ventilation cage, connected to a nebulizer for 5 min twice a day for 15 days at the same hours of the day. Doses of budesonide in the nebulizing solution were 0.116, 1.16, and 11.6mM. Doses of salbutamol in the nebulizing solution were 1.3, 13, and 130 mM. Forty-eight hours after treatment, the different groups were subjected to exploration of an elevated asymmetric plus-maze (APM, model of exploratory motivation), and 24h later to learning of an avoidance response to an ultrasonic tone in a two-compartment cage (model of memory and learning). Results showed that budesonide induces moderate effects on exploratory motivation. In one of the fear-inducing arms (single wall arm), exploration decreased and this effect was not dose dependent. In the cognitive model, glucocorticoids affected slightly the latency to escape but with no interference in memory efficiency. On the other hand, at the lower dose in the APM, salbutamol increased significantly the exploration of both fear-inducing arms (no walls and single wall arms). In the learning model, the beta-agonist induced two opposing effects. The lower dose (1.3mM) facilitated learning and the higher dose (13 mM) inhibited learning instead. In conclusion, results are compatible with the notion that inhaled glucocorticoids or beta-agonists might cross the lung aerial barrier into the blood compartment, exerting effects on learning and motivation functions.

The Chief Clinical Informatics Officer (CCIO): AMIA Task Force Report on CCIO Knowledge, Education, and Skillset Requirements.

PubMed

Kannry, Joseph; Sengstack, Patricia; Thyvalikakath, Thankam Paul; Poikonen, John; Middleton, Blackford; Payne, Thomas; Lehmann, Christoph U

2016-01-01

The emerging operational role of the "Chief Clinical Informatics Officer" (CCIO) remains heterogeneous with individuals deriving from a variety of clinical settings and backgrounds. The CCIO is defined in title, responsibility, and scope of practice by local organizations. The term encompasses the more commonly used Chief Medical Informatics Officer (CMIO) and Chief Nursing Informatics Officer (CNIO) as well as the rarely used Chief Pharmacy Informatics Officer (CPIO) and Chief Dental Informatics Officer (CDIO). The American Medical Informatics Association (AMIA) identified a need to better delineate the knowledge, education, skillsets, and operational scope of the CCIO in an attempt to address the challenges surrounding the professional development and the hiring processes of CCIOs. An AMIA task force developed knowledge, education, and operational skillset recommendations for CCIOs focusing on the common core aspect and describing individual differences based on Clinical Informatics focus. The task force concluded that while the role of the CCIO currently is diverse, a growing body of Clinical Informatics and increasing certification efforts are resulting in increased homogeneity. The task force advised that 1.) To achieve a predictable and desirable skillset, the CCIO must complete clearly defined and specified Clinical Informatics education and training. 2.) Future education and training must reflect the changing body of knowledge and must be guided by changing day-to-day informatics challenges. A better defined and specified education and skillset for all CCIO positions will motivate the CCIO workforce and empower them to perform the job of a 21st century CCIO. Formally educated and trained CCIOs will provide a competitive advantage to their respective enterprise by fully utilizing the power of Informatics science.

Shopping the World for Knowledge.

ERIC Educational Resources Information Center

Simpson, Liz

2002-01-01

Discusses why employers with a global work force partner with vendors in India, Russia, the Philippines, China, or other countries to recruit workers. Reasons include reduced employee costs, speed, a high level of technically educated and highly motivated individuals, and the uncertainty of the global situation. (JOW)

[Dehiberations over the semantics of mass communication media].

PubMed

Martines, R

1975-09-12

The radio, cinema and T.V. have developed their own idiolects and aesthetic standards. These in turn have influenced social relationships and education. Their effect is the reduction of society to a common mass, in which no attentuon is paid to individual motive forces.

PARTICIPATION OF ADULTS IN EDUCATION, A FORCE-FIELD ANALYSIS.

ERIC Educational Resources Information Center

MILLER, HARRY L.

VARIOUS SOCIOLOGICAL AND PSYCHOLOGICAL THEORIES RELATING TO MOTIVATION ARE POTENTIALLY USEFUL TOOLS FOR PREDICTING AND INFLUENCING ADULT EDUCATION PARTICIPATION. MASLOW'S NEED HIERARCHY IS BASED ON FUNDAMENTAL NEEDS (SURVIVAL, SAFETY, AND BELONGING), WHICH ARE NORMALLY FOLLOWED BY EGO NEEDS (RECOGNITION OR STATUS, ACHIEVEMENT, AND…

Research on Leadership, Motivation and Quality of Life in the Air Force Missile and Tanker Units

DTIC Science & Technology

1977-06-01

studying directly the results of applying different management principles in leading organizations. Enlight - ened management had demonstrated In... technologies for handling individual differences are fairly simple and straightforward. The demands placed upon analyses involving relationships and

Personalizing Sample Databases with Facebook Information to Increase Intrinsic Motivation

ERIC Educational Resources Information Center

Marzo, Asier; Ardaiz, Oscar; Sanz de Acedo, María Teresa; Sanz de Acedo, María Luisa

2017-01-01

Motivation is fundamental for students to achieve successful and complete learning. Motivation can be extrinsic, i.e., driven by external rewards, or intrinsic, i.e., driven by internal factors. Intrinsic motivation is the most effective and must be inspired by the task at hand. Here, a novel strategy is presented to increase intrinsic motivation…

Reducing Aggressive Behavior and Increasing Motivation in School: The Evolution of an Intervention to Strengthen School Adjustment

ERIC Educational Resources Information Center

Hudley, Cynthia; Graham, Sandra; Taylor, April

2007-01-01

The pervasive links between problem behaviors and school adjustment suggest that effective intervention programs to enhance school adjustment must focus both on decreasing the motivation to aggress and increasing the motivation to achieve. We describe a program of intervention research to improve social behavior and academic motivation in…

Fuel of the Bacterial Flagellar Type III Protein Export Apparatus.

PubMed

Minamino, Tohru; Kinoshita, Miki; Namba, Keiichi

2017-01-01

The flagellar type III export apparatus utilizes ATP and proton motive force (PMF) across the cytoplasmic membrane as the energy sources and transports flagellar component proteins from the cytoplasm to the distal growing end of the growing structure to construct the bacterial flagellum beyond the cellular membranes. The flagellar type III export apparatus coordinates flagellar protein export with assembly by ordered export of substrates to parallel with their order of the assembly. The export apparatus is composed of a PMF-driven transmembrane export gate complex and a cytoplasmic ATPase complex. Since the ATPase complex is dispensable for flagellar protein export, PMF is the primary fuel for protein unfolding and translocation. Interestingly, the export gate complex can also use sodium motive force across the cytoplasmic membrane in addition to PMF when the ATPase complex does not work properly. Here, we describe experimental protocols, which have allowed us to identify the export substrate class and the primary fuel of the flagellar type III protein export apparatus in Salmonella enterica serovar Typhimurium.

Spin-motive Force Induced by Domain Wall Dynamics in the Antiferromagnetic Spin Valve

NASA Astrophysics Data System (ADS)

Sugano, Ryoko; Ichimura, Masahiko; Takahashi, Saburo; Maekawa, Sadamichi; Crest Collaboration

2014-03-01

In spite of no net magnetization in antiferromagnetic (AF) textures, the local magnetic properties (Neel magnetization) can be manipulated in a similar fashion to ferromagnetic (F) ones. It is expected that, even in AF metals, spin transfer torques (STTs) lead to the domain wall (DW) motion and that the DW motion induces spin-motive force (SMF). In order to study the Neel magnetization dynamics and the resultant SMF, we treat the nano-structured F1/AF/F2 junction. The F1 and F2 leads behave as a spin current injector and a detector, respectively. Each F lead is fixed in the different magnetization direction. Torsions (DW in AF) are introduced reflecting the fixed magnetization of two F leads. We simulated the STT-induced Neel magnetization dynamics with the injecting current from F1 to F2 and evaluate induced SMF. Based on the adiabatic electron dynamics in the AF texture, Langevin simulations are performed at finite temperature. This research was supported by JST, CREST, Japan.

Functional rotation induced by alternating protonation states in the multidrug transporter AcrB: all-atom molecular dynamics simulations.

PubMed

Yamane, Tsutomu; Murakami, Satoshi; Ikeguchi, Mitsunori

2013-10-29

The multidrug transporter AcrB actively exports a wide variety of noxious compounds using proton-motive force as an energy source in Gram-negative bacteria. AcrB adopts an asymmetric structure comprising three protomers with different conformations that are sequentially converted during drug export; these cyclic conformational changes during drug export are referred to as functional rotation. To investigate functional rotation driven by proton-motive force, all-atom molecular dynamics simulations were performed. Using different protonation states for the titratable residues in the middle of the transmembrane domain, our simulations revealed the correlation between the specific protonation states and the side-chain configurations. Changing the protonation state for Asp408 induced a spontaneous structural transition, which suggests that the proton translocation stoichiometry may be one proton per functional rotation cycle. Furthermore, our simulations demonstrate that alternating the protonation states in the transmembrane domain induces functional rotation in the porter domain, which is primarily responsible for drug transport.

Motivation and temporal distance: effect on cognitive and affective manifestations.

PubMed

Bjørnebekk, Gunnar; Gjesme, Torgrim

2009-10-01

The implications of temporal distance on motivation-related concepts were examined. The results of an experiment, based on 585 Grade 6 students, indicated that both positive (approach) and negative (avoidance) motivation increased as the future goal or event approached in time. This increase in approach and avoidance motivation influenced the performance of the pupils differently. For pupils with success orientation, the performance increased. For pupils with failure orientation, the performance remained about the same.

A note on the microeconomics of migration.

PubMed

Stahl, K

1983-11-01

"The purpose of this note is to demonstrate in a simple model that an individual's migration from a small town to a large city may be rationalized purely by a consumption motive, rather than the motive of obtaining a higher income. More specifically, it is shown that in a large city an individual may derive a higher utility from spending a given amount of income than in a small town." A formal model is first developed that includes the principal forces at work and is then illustrated using a graphic example. The theoretical and empirical issues raised are considered in the concluding section. excerpt

Troubled parents, motivated adolescents: predicting motivation to change substance use among runaways.

PubMed

Slesnick, Natasha; Bartle-Haring, Suzanne; Erdem, Gizem; Budde, Hannah; Letcher, Amber; Bantchevska, Denitza; Patton, Rikki

2009-08-01

Runaway adolescents engage in high rates of substance use and report significant family and individual problems. However, in general, adolescents report low motivation to change their substance use. Because a higher level of motivation for changing substance use is associated with greater substance abuse treatment success, identifying variables associated with motivation for change can be useful for enhancing treatment success. In this study, predictors of motivation for changing substance use were examined among 140 shelter-recruited adolescents and their parents/primary caretakers. Several findings were noteworthy. A perceived negative family environment increased parents' and adolescents' depressive symptoms, which increased adolescent's motivation to change. Also, greater severity of adolescent substance use predicted higher motivation to change. Consideration of the family environment and parent problems when addressing motivation for changing substance use among these adolescents might be important foci for motivational interventions and future research.

Troubled Parents, Motivated Adolescents: Predicting Motivation to Change Substance Use among Runaways

PubMed Central

Slesnick, Natasha; Bartle-Haring, Suzanne; Erdem, Gizem; Budde, Hannah; Letcher, Amber; Bantchevska, Denitza; Garren, Rikki

2009-01-01

Runaway adolescents engage in high rates of substance use and report significant family and individual problems. However, in general, adolescents report low motivation to change their substance use. Because a higher level of motivation for changing substance use is associated with greater substance abuse treatment success, identifying variables associated with motivation for change can be useful for enhancing treatment success. In this study, predictors of motivation for changing substance use were examined among 140 shelter-recruited adolescents and their parents/primary caretakers. Several findings were noteworthy. A perceived negative family environment increased parents' and adolescents' depressive symptoms, which increased adolescent's motivation to change. Also, greater severity of adolescent substance use predicted higher motivation to change. Consideration of the family environment and parent problems when addressing motivation for changing substance use among these adolescents might be important foci for motivational interventions and future research. PMID:19411144

It's about time: Earlier rewards increase intrinsic motivation.

PubMed

Woolley, Kaitlin; Fishbach, Ayelet

2018-06-01

Can immediate (vs. delayed) rewards increase intrinsic motivation? Prior research compared the presence versus absence of rewards. By contrast, this research compared immediate versus delayed rewards, predicting that more immediate rewards increase intrinsic motivation by creating a perceptual fusion between the activity and its goal (i.e., the reward). In support of the hypothesis, framing a reward from watching a news program as more immediate (vs. delayed) increased intrinsic motivation to watch the program (Study 1), and receiving more immediate bonus (vs. delayed, Study 2; and vs. delayed and no bonus, Study 3) increased intrinsic motivation in an experimental task. The effect of reward timing was mediated by the strength of the association between an activity and a reward, and was specific to intrinsic (vs. extrinsic) motivation-immediacy influenced the positive experience of an activity, but not perceived outcome importance (Study 4). In addition, the effect of the timing of rewards was independent of the effect of the magnitude of the rewards (Study 5). (PsycINFO Database Record (c) 2018 APA, all rights reserved).

Making sense by making sentient: effectance motivation increases anthropomorphism.

PubMed

Waytz, Adam; Morewedge, Carey K; Epley, Nicholas; Monteleone, George; Gao, Jia-Hong; Cacioppo, John T

2010-09-01

People commonly anthropomorphize nonhuman agents, imbuing everything from computers to pets to gods with humanlike capacities and mental experiences. Although widely observed, the determinants of anthropomorphism are poorly understood and rarely investigated. We propose that people anthropomorphize, in part, to satisfy effectance motivation-the basic and chronic motivation to attain mastery of one's environment. Five studies demonstrated that increasing effectance motivation by manipulating the perceived unpredictability of a nonhuman agent or by increasing the incentives for mastery increases anthropomorphism. Neuroimaging data demonstrated that the neural correlates of this process are similar to those engaged when mentalizing other humans. A final study demonstrated that anthropomorphizing a stimulus makes it appear more predictable and understandable, suggesting that anthropomorphism satisfies effectance motivation. Anthropomorphizing nonhuman agents seems to satisfy the basic motivation to make sense of an otherwise uncertain environment. (PsycINFO Database Record (c) 2010 APA, all rights reserved).

Forces on wheels and fuel consumption in cars

NASA Astrophysics Data System (ADS)

Güémez, J.; Fiolhais, M.

2013-07-01

Motivated by real classroom discussions, we analyze the forces acting on moving vehicles, specifically friction on their wheels. In typical front-wheel-drive cars when the car accelerates these forces are in the forward direction in the front wheels, but they are in the opposite direction in the rear wheels. The situation may be intriguing for students, but it may also be helpful and stimulating to clarify the role of friction forces on rolling objects. In this paper we also study the thermodynamical aspects of an accelerating car, relating the distance traveled to the amount of fuel consumed. The fuel consumption is explicitly shown to be Galilean invariant and we identify the Gibbs free energy as the relevant quantity that enters into the thermodynamical description of the accelerating car. The more realistic case of the car's motion with the dragging forces taken into account is also discussed.

A comparison of methods for computing the sigma-coordinate pressure gradient force for flow over sloped terrain in a hybrid theta-sigma model

NASA Technical Reports Server (NTRS)

Johnson, D. R.; Uccellini, L. W.

1983-01-01

In connection with the employment of the sigma coordinates introduced by Phillips (1957), problems can arise regarding an accurate finite-difference computation of the pressure gradient force. Over steeply sloped terrain, the calculation of the sigma-coordinate pressure gradient force involves computing the difference between two large terms of opposite sign which results in large truncation error. To reduce the truncation error, several finite-difference methods have been designed and implemented. The present investigation has the objective to provide another method of computing the sigma-coordinate pressure gradient force. Phillips' method is applied for the elimination of a hydrostatic component to a flux formulation. The new technique is compared with four other methods for computing the pressure gradient force. The work is motivated by the desire to use an isentropic and sigma-coordinate hybrid model for experiments designed to study flow near mountainous terrain.

Stability of Granular Packings Jammed under Gravity: Avalanches and Unjamming

NASA Astrophysics Data System (ADS)

Merrigan, Carl; Birwa, Sumit; Tewari, Shubha; Chakraborty, Bulbul

Granular avalanches indicate the sudden destabilization of a jammed state due to a perturbation. We propose that the perturbation needed depends on the entire force network of the jammed configuration. Some networks are stable, while others are fragile, leading to the unpredictability of avalanches. To test this claim, we simulated an ensemble of jammed states in a hopper using LAMMPS. These simulations were motivated by experiments with vibrated hoppers where the unjamming times followed power-law distributions. We compare the force networks for these simulated states with respect to their overall stability. The states are classified by how long they remain stable when subject to continuous vibrations. We characterize the force networks through both their real space geometry and representations in the associated force-tile space, extending this tool to jammed states with body forces. Supported by NSF Grant DMR1409093 and DGE1068620.

Effects of changes in membrane sodium flux on virulence gene expression in Vibrio cholerae

PubMed Central

Häse, Claudia C.; Mekalanos, John J.

1999-01-01

The expression of several virulence factors of Vibrio cholerae is coordinately regulated by the ToxT molecule and the membrane proteins TcpP/H and ToxR/S, which are required for toxT transcription. To identify proteins that negatively affect toxT transcription, we screened transposon mutants of V. cholerae carrying a chromosomally integrated toxT∷lacZ reporter construct for darker blue colonies on media containing 5-bromo-4-chlor-3-indolyl β-d galactoside (X-gal). Two mutants had transposon insertions in a region homologous to the nqr gene cluster of Vibrio alginolyticus, encoding a sodium-translocating NADH–ubiquinone oxidoreductase (NQR). In V. alginolyticus, NQR is a respiration-linked Na+ extrusion pump generating a sodium motive force that can be used for solute import, ATP synthesis, and flagella rotation. Inhibition of NQR enzyme function in V. cholerae by the specific inhibitor 2-n-heptyl-4-hydroxyquinoline N-oxide (HQNO) resulted in elevated toxT∷lacZ activity. Increased toxT∷lacZ expression in an nqr mutant strain compared with the parental strain was observed when the TcpP/H molecules alone were strongly expressed, suggesting that the negative effect of the NQR complex on toxT transcription is mediated through TcpP/H. However, the ability of the TcpP/H proteins to activate the toxT∷lacZ reporter construct was greatly diminished in the presence of high NaCl concentrations in the growth medium. The flagellar motor of V. cholerae appears to be driven by a sodium motive force, and modulation of flagella rotation by inhibitory drugs, high media viscosity, or specific mutations resulted in increases of toxT∷lacZ expression. Thus, the regulation of the main virulence factors of V. cholerae appears to be modulated by endogenous and exogenous sodium levels in a complex way. PMID:10077658

Design of a pulse-type strain gauge balance for a long-test-duration hypersonic shock tunnel

NASA Astrophysics Data System (ADS)

Wang, Y.; Liu, Y.; Jiang, Z.

2016-11-01

When the measurement of aerodynamic forces is conducted in a hypersonic shock tunnel, the inertial forces lead to low-frequency vibrations of the model, and its motion cannot be addressed through digital filtering because a sufficient number of cycles cannot be obtained during a tunnel run. This finding implies restrictions on the model size and mass as the natural frequencies are inversely proportional to the length scale of the model. Therefore, the force measurement still has many problems, particularly for large and heavy models. Different structures of a strain gauge balance (SGB) are proposed and designed, and the measurement element is further optimized to overcome the difficulties encountered during the measurement of aerodynamic forces in a shock tunnel. The motivation for this study is to assess the structural performance of the SGB used in a long-test-duration JF12 hypersonic shock tunnel, which has more than 100 ms of test time. Force tests were conducted for a large-scale cone with a 10^° semivertex angle and a length of 0.75 m in the JF12 long-test-duration shock tunnel. The finite element method was used for the analysis of the vibrational characteristics of the Model-Balance-Sting System (MBSS) to ensure a sufficient number of cycles, particularly for the axial force signal during a shock tunnel run. The higher-stiffness SGB used in the test shows good performance, wherein the frequency of the MBSS increases because of the stiff construction of the balance. The experimental results are compared with the data obtained in another wind tunnel and exhibit good agreement at M = 7 and α =5°.

Quantitative study of FORC diagrams in thermally corrected Stoner- Wohlfarth nanoparticles systems

NASA Astrophysics Data System (ADS)

De Biasi, E.; Curiale, J.; Zysler, R. D.

2016-12-01

The use of FORC diagrams is becoming increasingly popular among researchers devoted to magnetism and magnetic materials. However, a thorough interpretation of this kind of diagrams, in order to achieve quantitative information, requires an appropriate model of the studied system. For that reason most of the FORC studies are used for a qualitative analysis. In magnetic systems thermal fluctuations "blur" the signatures of the anisotropy, volume and particle interactions distributions, therefore thermal effects in nanoparticles systems conspire against a proper interpretation and analysis of these diagrams. Motivated by this fact, we have quantitatively studied the degree of accuracy of the information extracted from FORC diagrams for the special case of single-domain thermal corrected Stoner- Wohlfarth (easy axes along the external field orientation) nanoparticles systems. In this work, the starting point is an analytical model that describes the behavior of a magnetic nanoparticles system as a function of field, anisotropy, temperature and measurement time. In order to study the quantitative degree of accuracy of our model, we built FORC diagrams for different archetypical cases of magnetic nanoparticles. Our results show that from the quantitative information obtained from the diagrams, under the hypotheses of the proposed model, is possible to recover the features of the original system with accuracy above 95%. This accuracy is improved at low temperatures and also it is possible to access to the anisotropy distribution directly from the FORC coercive field profile. Indeed, our simulations predict that the volume distribution plays a secondary role being the mean value and its deviation the only important parameters. Therefore it is possible to obtain an accurate result for the inversion and interaction fields despite the features of the volume distribution.

Examining the relationship between recreational sport participation and intrinsic and extrinsic motivation and amotivation.

PubMed

Tsorbatzoudis, Haralambos; Alexandris, Konstantinos; Zahariadis, Panagiotis; Grouios, George

2006-10-01

This study aimed at investigating the effect of motivational dimensions proposed by Pelletier, et al. in 1995, both on sport participation levels and on intention for continuing participation among adult recreational sport participants. Two hundred and fifty-seven adult individuals, who reported participation in some type of sport and physical activity, completed the Sport Motivation Scale and a scale measuring intention. The study provided evidence to suggest that increased motivation leads to increased participation. Amotivation significantly decreased from the least to the most frequent participant groups, while both extrinsic and intrinsic motivation followed the reverse pattern. The results also indicated that increased intrinsic motivation to gain knowledge and accomplishment and extrinsic motivation (introjected regulation) are positively correlated with individuals' intentions to continue participation, while amotivation is negatively related. These results provide limited support for the self-determination theory. Implications for sport participation promotion are discussed.

Yokukansankachimpihange increased body weight but not food-incentive motivation in wild-type mice.

PubMed

Hamaguchi, Takuya; Tsutsui-Kimura, Iku; F Tanaka, Kenji; Mimura, Masaru

2017-08-01

Yokukansankachimpihange (YKSCH), a traditional Japanese medicine, is widely used for the amelioration of the behavioral and psychological symptoms of dementia with digestive dysfunction. Regardless of its successful use for digestive dysfunction, the effect of YKSCH on body weight was unknown. Furthermore, if YKSCH increased body weight, it might increase motivation according to Kampo medicine theory. Therefore, we investigated whether YKSCH had the potential to increase body weight and enhance motivation in mice. To address this, C57BL/6J mice were used to evaluate the long-term effect of YKSCH on body weight and food-incentive motivation. As part of the evaluation, we optimized an operant test for use over the long-term. We found that feeding mice YKSCH-containing chow increased body weight, but did not increase their motivation to food reward. We propose that YKSCH may be a good treatment option for preventing decrease in body weight in patients with dementia.

Estradiol, dopamine and motivation.

PubMed

Yoest, Katie E; Cummings, Jennifer A; Becker, Jill B

2014-01-01

The gonadal hormone estradiol modulates mesolimbic dopamine systems in the female rat. This modulatory effect is thought to be responsible for the observed effects of estradiol on motivated behaviors. Dopamine acting in the nucleus accumbens is thought to be important for the attribution of incentive motivational properties to cues that predict reward delivery, while dopamine in the striatum is associated with the expression of repetitive or stereotyped behaviors. Elevated concentrations of estradiol are associated with increased motivation for sex or cues associated with access to a mate, while simultaneously attenuating motivation for food. This shift in motivational salience is important for adaptive choice behavior in the natural environment. Additionally, estradiol's adaptive effects on motivation can be maladaptive when increasing motivation for non-natural reinforcers, such as drugs of abuse. Here we discuss the effect of estradiol on mesotelencephalic dopamine transmission and subsequent effects on motivated behaviors.

Autonomy supportive environments and mastery as basic factors to motivate physical activity in children: a controlled laboratory study

USDA-ARS?s Scientific Manuscript database

Background Choice promotes the experience of autonomy, which enhances intrinsic motivation. Providing a greater choice of traditional active toys may increase children’s activity time. Mastery also increases intrinsic motivation and is designed into exergames, which may increase play time of a singl...

Transport Pathways—Proton Motive Force Interrelationship in Durum Wheat Mitochondria

PubMed Central

Trono, Daniela; Laus, Maura N.; Soccio, Mario; Pastore, Donato

2014-01-01

In durum wheat mitochondria (DWM) the ATP-inhibited plant mitochondrial potassium channel (PmitoKATP) and the plant uncoupling protein (PUCP) are able to strongly reduce the proton motive force (pmf) to control mitochondrial production of reactive oxygen species; under these conditions, mitochondrial carriers lack the driving force for transport and should be inactive. However, unexpectedly, DWM uncoupling by PmitoKATP neither impairs the exchange of ADP for ATP nor blocks the inward transport of Pi and succinate. This uptake may occur via the plant inner membrane anion channel (PIMAC), which is physiologically inhibited by membrane potential, but unlocks its activity in de-energized mitochondria. Probably, cooperation between PIMAC and carriers may accomplish metabolite movement across the inner membrane under both energized and de-energized conditions. PIMAC may also cooperate with PmitoKATP to transport ammonium salts in DWM. Interestingly, this finding may trouble classical interpretation of in vitro mitochondrial swelling; instead of free passage of ammonia through the inner membrane and proton symport with Pi, that trigger metabolite movements via carriers, transport of ammonium via PmitoKATP and that of the counteranion via PIMAC may occur. Here, we review properties, modulation and function of the above reported DWM channels and carriers to shed new light on the control that they exert on pmf and vice-versa. PMID:24821541

Focus on People and the Science Will Follow: Motivating Forces for Professional Movement in Stem Cell Research.

PubMed

Jacob, K J; Longstaff, H; Scott, C T; Illes, J

2015-08-01

The migration of researchers across geographic borders, or "brain drain" as it is commonly called, remains an important issue for governments around the world as loss or gain of highly qualified personnel in research can have substantial social, economic and political consequences. In the present study we seek to examine the forces that drive international professional migration of stem cell (SC) researchers, for which variation of SC policy in different jurisdictions has previously been implicated as a driving force. Structured interviews were carried out with a purposive sample of SC researchers in the professoriate who had made international moves after postdoctoral work between the years 2001-2014, or were actively anticipating a future move. Participants were asked to rank motivators of international movement on a 5-point Likert scale and prompted to elaborate on their answers. The results suggest that career considerations, availability of research funding, and personal considerations are of high importance to the participants when considering an international move, while the permissiveness or restrictiveness SC research policy is of comparably lower importance. Participants also expressed that international movements are beneficial to scientific careers overall. The findings have important implications for policy and strategies to attract and retain members of the SC research community.

An Action Research Study Using the Music Model of Academic Motivation to Increase Reading Motivation in a Fourth-Grade Classroom

ERIC Educational Resources Information Center

Williams, Angela W.

2013-01-01

This study involved examination of the processes employed in tailoring fourth-grade reading instruction to increase levels of student motivation. A participatory action research approach was utilized to design and conduct reading instruction that fourth-grade students perceived to be motivating. The reading instructional program was designed using…

Dissociating motivation from reward in human striatal activity.

PubMed

Miller, Eric M; Shankar, Maya U; Knutson, Brian; McClure, Samuel M

2014-05-01

Neural activity in the striatum has consistently been shown to scale with the value of anticipated rewards. As a result, it is common across a number of neuroscientific subdiscliplines to associate activation in the striatum with anticipation of a rewarding outcome or a positive emotional state. However, most studies have failed to dissociate expected value from the motivation associated with seeking a reward. Although motivation generally scales positively with increases in potential reward, there are circumstances in which this linkage does not apply. The current study dissociates value-related activation from that induced by motivation alone by employing a task in which motivation increased as anticipated reward decreased. This design reverses the typical relationship between motivation and reward, allowing us to differentially investigate fMRI BOLD responses that scale with each. We report that activity scaled differently with value and motivation across the striatum. Specifically, responses in the caudate and putamen increased with motivation, whereas nucleus accumbens activity increased with expected reward. Consistent with this, self-report ratings indicated a positive association between caudate and putamen activity and arousal, whereas activity in the nucleus accumbens was more associated with liking. We conclude that there exist regional limits on inferring reward expectation from striatal activation.

Dissociating Motivation from Reward in Human Striatal Activity

PubMed Central

Miller, Eric M.; Shankar, Maya U.; Knutson, Brian; McClure, Samuel M.

2018-01-01

Neural activity in the striatum has consistently been shown to scale with the value of anticipated rewards. As a result, it is common across a number of neuroscientific subdiscliplines to associate activation in the striatum with anticipation of a rewarding outcome or a positive emotional state. However, most studies have failed to dissociate expected value from the motivation associated with seeking a reward. Although motivation generally scales positively with increases in potential reward, there are circumstances in which this linkage does not apply. The current study dissociates value-related activation from that induced by motivation alone by employing a task in which motivation increased as anticipated reward decreased. This design reverses the typical relationship between motivation and reward, allowing us to differentially investigate fMRI BOLD responses that scale with each. We report that activity scaled differently with value and motivation across the striatum. Specifically, responses in the caudate and putamen increased with motivation, whereas nucleus accumbens activity increased with expected reward. Consistent with this, self-report ratings indicated a positive association between caudate and putamen activity and arousal, whereas activity in the nucleus accumbens was more associated with liking. We conclude that there exist regional limits on inferring reward expectation from striatal activation. PMID:24345173

Adam M. Grant: Award for Distinguished Scientific Early Career Contributions to Psychology.

PubMed

2011-11-01

Presents Adam M. Grant, the 2011 winner of the American Psychological Association Award for Distinguished Scientific Early Career Contributions to Psychology. "For extensive, elegant, and programmatic research on the power of relational job design in enhancing employee motivation, productivity, and satisfaction; for creative and rigorous studies documenting the profound and surprising effects of connecting employees to their impact on others; for highlighting prosocial motivation, not only extrinsic and intrinsic motivations, as a key force behind employee behavior; and for demonstrating by example the feasibility and benefits of conducting field experiments, yielding studies rich in internal validity, external validity, and practical impact. In addition to his accomplishments, Adam M. Grant is known for his generosity as a scholar, teacher, and colleague." (PsycINFO Database Record (c) 2011 APA, all rights reserved). 2011 APA, all rights reserved

The terrorist mind: I. A psychological and political analysis.

PubMed

Miller, Laurence

2006-04-01

Part I of this two-part article describes the major forms of domestic and foreign terrorism, the motivations of the perpetrators, and the psychological, social, and political forces that contribute to this most particular expression of violence. The article addresses the question of whether all terrorists are sick or evil and considers the possibility that some forms of terrorism, however odious their result, can be a rational response to a situation of perceived intolerable injustice. The article examines what motivates people to join terrorist groups and what may later move them to leave the terrorist lifestyle. Special consideration is given to the psychological and religious dynamics of suicide terrorism and what might motivate some people to give their lives for their cause. Finally, the article offers recommendations for a multipronged approach to dealing with this modern yet ageless scourge.

Motivation in pediatric motor rehabilitation: A systematic search of the literature using the self-determination theory as a conceptual framework.

PubMed

Meyns, Pieter; Roman de Mettelinge, Tine; van der Spank, Judith; Coussens, Marieke; Van Waelvelde, Hilde

2017-03-09

Motivation is suggested as an important factor in pediatric motor rehabilitation. Therefore, we reviewed the existing evidence of (motivational) motor rehabilitation paradigms, and how motivation influences rehabilitation outcome using self-determination theory as conceptual framework. PubMed and Web-of-Science databases were systematically searched until June 2015. Data were independently extracted and critiqued for quality by three authors. Studies reporting motivational aspects were included. Most studies examined new technology (e.g., virtual reality [VR]). Out of 479 records, three RCT, six case-control, and six non-comparative studies were included with mixed quality. Motivation was rarely reported. Training individualization to the child's capabilities with more variety seemed promising to increase motivation. Motivation increased when the exercises seemed helpful for daily activities. Motivation in pediatric rehabilitation should be comprehensively assessed within a theoretical framework as there are indications that motivated children have better rehabilitation outcomes, depending on the aspect of motivation.

32 CFR 700.405 - Delegated authority and responsibility.

Code of Federal Regulations, 2010 CFR

2010-07-01

... education training and equal opportunities for personal advancement, and maintaining the morale and motivation of Navy personnel and the prestige of a Navy career; (4) To plan and provide health care for... determine the requirements of naval forces and activities, to include requirements for research, development...

Microgravity Storage Vessels and Conveying-Line Feeders for Cohesive Regolith

NASA Technical Reports Server (NTRS)

Walton, Otis R.; Vollmer, Hubert J.

2013-01-01

Under microgravity, the usual methods of placing granular solids into, or extracting them from, containers or storage vessels will not function. Alternative methods are required to provide a motive force to move the material. New configurations for microgravity regolith storage vessels that do not resemble terrestrial silos, hoppers, or tanks are proposed. The microgravity-compatible bulk-material storage vessels and exit feed configurations are designed to reliably empty and feed cohesive material to transfer vessels or conveying ducts or lines without gravity. A controllable motive force drives the cohesive material to the exit opening(s), and provides a reliable means to empty storage vessels and/or to feed microgravity conveying lines. The proposed designs will function equally well in vacuum, or inside of pressurized enclosures. Typical terrestrial granular solids handling and storage equipment will not function under microgravity, since almost all such equipment relies on gravity to at least move material to an exit location or to place it in the bottom of a container. Under microgravity, there effectively are no directions of up or down, and in order to effect movement of material, some other motive force must be applied to the material. The proposed storage vessels utilize dynamic centrifugal force to effect movement of regolith whenever material needs to be removed from the storage vessel. During simple storage, no dynamic motion or forces are required. The rotation rate during emptying can be controlled to ensure that material will move to the desired exit opening, even if the material is highly cohesive, or has acquired an electrostatic charge. The general concept of this Swirl Action Utilized for Centrifugal Ejection of Regolith (SAUCER) microgravity storage unit/dynamic feeder is to have an effective slot-hopper (based on the converging angles of the top and bottom conical section of the vessel) with an exit slot around the entire periphery of the SAUCER. The basic shape of such a unit is like two Chinese straw hats (douli) - one upside down, on the bottom, and another on top; or two wokpans, one upright on the bottom and another inverted on top, with a small gap between the upright and inverted pans or hats (around the periphery). A stationary outer ring, much like an unmounted bicycle tire, surrounds the gap between the two coaxial, nearly conical pieces, forming the top and bottom of the unit.

Validation of Multibody Program to Optimize Simulated Trajectories II Parachute Simulation with Interacting Forces

NASA Technical Reports Server (NTRS)

Raiszadeh, Behzad; Queen, Eric M.; Hotchko, Nathaniel J.

2009-01-01

A capability to simulate trajectories of multiple interacting rigid bodies has been developed, tested and validated. This capability uses the Program to Optimize Simulated Trajectories II (POST 2). The standard version of POST 2 allows trajectory simulation of multiple bodies without force interaction. In the current implementation, the force interaction between the parachute and the suspended bodies has been modeled using flexible lines, allowing accurate trajectory simulation of the individual bodies in flight. The POST 2 multibody capability is intended to be general purpose and applicable to any parachute entry trajectory simulation. This research paper explains the motivation for multibody parachute simulation, discusses implementation methods, and presents validation of this capability.

Motivated mind perception: treating pets as people and people as animals.

PubMed

Epley, Nicholas; Schroeder, Juliana; Waytz, Adam

2013-01-01

Human beings have a sophisticated ability to reason about the minds of others, often referred to as using one's theory of mind or mentalizing. Just like any other cognitive ability, people engage in reasoning about other minds when it seems useful for achieving particular goals, but this ability remains disengaged otherwise. We suggest that understanding the factors that engage our ability to reason about the minds of others helps to explain anthropomorphism: cases in which people attribute minds to a wide range of nonhuman agents, including animals, mechanical and technological objects, and supernatural entities such as God. We suggest that engagement is guided by two basic motivations: (1) the motivation to explain and predict others' actions, and (2) the motivation to connect socially with others. When present, these motivational forces can lead people to attribute minds to almost any agent. When absent, the likelihood of attributing a mind to others, even other human beings, decreases. We suggest that understanding the factors that engage our theory of mind can help to explain the inverse process of dehumanization, and also why people might be indifferent to other people even when connecting to them would improve their momentary wellbeing.

Passion and intrinsic motivation in digital gaming.

PubMed

Wang, Chee Keng John; Khoo, Angeline; Liu, Woon Chia; Divaharan, Shanti

2008-02-01

Digital gaming is fast becoming a favorite activity all over the world. Yet very few studies have examined the underlying motivational processes involved in digital gaming. One motivational force that receives little attention in psychology is passion, which could help us understand the motivation of gamers. The purpose of the present study was to identify subgroups of young people with distinctive passion profiles on self-determined regulations, flow dispositions, affect, and engagement time in gaming. One hundred fifty-five students from two secondary schools in Singapore participated in the survey. There were 134 males and 8 females (13 unspecified). The participants completed a questionnaire to measure harmonious passion (HP), obsessive passion (OP), perceived locus of causality, disposition flow, positive and negative affects, and engagement time in gaming. Cluster analysis found three clusters with distinct passion profiles. The first cluster had an average HP/OP profile, the second cluster had a low HP/OP profile, and the third cluster had a high HP/OP profile. The three clusters displayed different levels of cognitive, affective, and behavioral outcomes. Cluster analysis, as this study shows, is useful in identifying groups of gamers with different passion profiles. It has helped us gain a deeper understanding of motivation in digital gaming.

Effects of adolescent online gaming time and motives on depressive, musculoskeletal, and psychosomatic symptoms.

PubMed

Hellström, Charlotta; Nilsson, Kent W; Leppert, Jerzy; Åslund, Cecilia

2015-01-01

To investigate whether adolescent online gaming time and the additive effect of gaming motives were associated with depressive, musculoskeletal, and psychosomatic symptoms. The hypothesis was that adolescents who engage in online gaming with escape motives and increased online gaming time have higher probability for depressive, musculoskeletal, and psychosomatic symptoms compared to adolescents with other online gaming motives and/or less online gaming time. An anonymous and voluntary questionnaire was completed during class hours by 7,757 Swedish adolescents aged 13-18 years. The questionnaire included demographic background, gaming habits, and depressive, musculoskeletal, and psychosomatic symptoms. It was found that increased online gaming time during weekdays increased the probability of having depressive, musculoskeletal, and psychosomatic symptoms. However, these relations with time spent gaming were further explained by online gaming motives. Weekday online gaming for more than five hours a day, in combination with escape motives, was associated with an increased probability of depressive symptoms (odds ratio (OR) 4.614, 95% CI 3.230-6.590), musculoskeletal symptoms (OR 2.494, 95% CI 1.598-3.892), and psychosomatic symptoms (OR 4.437, 95% CI 2.966-6.637). The probability of ill health decreased when gaming was for fun or had social motives. Excessive gaming time and escape motives were found to be associated with increased probability of ill health among adolescents. Gaming motives may identify gamers in need of support to reduce unhealthy gaming behaviour as well as identify individuals at risk for ill health.

Age and motives for volunteering: testing hypotheses derived from socioemotional selectivity theory.

PubMed

Okun, Morris A; Schultz, Amy

2003-06-01

Following a meta-analysis of the relations between age and volunteer motives (career, understanding, enhancement, protective, making friends, social, and values), the authors tested hypotheses derived from socioemotional selectivity theory regarding the effects of age on these volunteer motives. The Volunteer Functions Inventory was completed by 523 volunteers from 2 affiliates of the International Habitat for Humanity. Multiple regression analyses revealed, as predicted, that as age increases, career and understanding volunteer motivation decrease and social volunteer motivation increases. Contrary to expectations, age did not contribute to the prediction of enhancement, protective, and values volunteer motivations and the relation between age and making friends volunteer motivation was nonlinear. The results were discussed in the context of age-differential and age-similarity perspectives on volunteer motivation.

Injury prevention during physical activity in the Australian Defence Force.

PubMed

Sherrard, J; Lenné, M; Cassell, E; Stokes, M; Ozanne-Smith, J

2004-03-01

Injuries sustained by Australian Defence Force (ADF) personnel during non-combat military training and sports activity are associated with increasing costs due to work days lost, medical treatment, compensation, and early retirement. In 2001, the ADF commissioned a systematic review of the evidence-base for reducing injuries associated with physical activity, while at the same time improving physical activity participation rates to sustain a trained, fit and deployable workforce. Literature from on-line library databases, relevant unclassified military reports, and material from previously published sport-specific injury countermeasure reviews were systematically and critically analysed to address the study aims. Modification of intensity, frequency and duration of basic military training activities and improved equipment is likely to reduce injury occurrence. Sports injury countermeasures used for the civilian population have merit for the ADF physical activity program. Injury countermeasures should be designed to minimise any possible deterrent effect on the motivation to participate in regular physical activity. Increasing the participation of ADF personnel in physical activity in the presence of evidence-based injury prevention strategies has the potential to increase health, fitness and deployability with minimal impact on injury frequency. Recommendations arising from the review include injury intervention trials in basic military training and sports. These and other interventions should be supported by refinement to ADF injury surveillance systems. Research should focus on interventions with the greatest gain for fitness, deployability, and cost effectiveness.

Incubation of sucrose craving: effects of reduced training and sucrose pre-loading

PubMed Central

Grimm, Jeffrey W.; Fyall, Amber M.; Osincup, Dan P.

2010-01-01

Time-dependent increases in cue-induced reward seeking after forced abstinence were described in rats with a history of cocaine or sucrose self-administration, suggesting reward craving incubates over time. In the present study, we examined the effects of reduced training experience, or sucrose pre-loading just prior to testing, on the incubation of sucrose craving. Sucrose seeking (responding in extinction and then for a sucrose-paired cue) increased over time in groups of rats that self-administered sucrose 6 h/day for 10 days and were tested at 1, 7, or 30 days of forced abstinence. We found that groups of rats that had self-administered 2 instead of 6 h/day showed a similar profile of responding. Incubation of sucrose craving was attenuated by free access to sucrose in home cages for 17 h immediately prior to testing assessed as extinction responding on days 1 and 30. However, this sucrose pre-loading had no effect on the time-dependent increase in responding for the sucrose-paired cue. In summary, reducing the training experience had no effect on the incubation of sucrose craving and free access to sucrose had only a limited effect–attenuating extinction responding. These results illustrate the strength of the incubation of craving and further suggest long-term changes in brain motivational circuitry following sucrose self-administration. PMID:15642609

Computational modeling of muscular thin films for cardiac repair

NASA Astrophysics Data System (ADS)

Böl, Markus; Reese, Stefanie; Parker, Kevin Kit; Kuhl, Ellen

2009-03-01

Motivated by recent success in growing biohybrid material from engineered tissues on synthetic polymer films, we derive a computational simulation tool for muscular thin films in cardiac repair. In this model, the polydimethylsiloxane base layer is simulated in terms of microscopically motivated tetrahedral elements. Their behavior is characterized through a volumetric contribution and a chain contribution that explicitly accounts for the polymeric microstructure of networks of long chain molecules. Neonatal rat ventricular cardiomyocytes cultured on these polymeric films are modeled with actively contracting truss elements located on top of the sheet. The force stretch response of these trusses is motivated by the cardiomyocyte force generated during active contraction as suggested by the filament sliding theory. In contrast to existing phenomenological models, all material parameters of this novel model have a clear biophyisical interpretation. The predictive features of the model will be demonstrated through the simulation of muscular thin films. First, the set of parameters will be fitted for one particular experiment documented in the literature. This parameter set is then used to validate the model for various different experiments. Last, we give an outlook of how the proposed simulation tool could be used to virtually predict the response of multi-layered muscular thin films. These three-dimensional constructs show a tremendous regenerative potential in repair of damaged cardiac tissue. The ability to understand, tune and optimize their structural response is thus of great interest in cardiovascular tissue engineering.

Motivation and social contexts: a crossnational pilot study of achievement, power, and affiliation motives.

PubMed

Xu, Xiaoyan; Xu, Yangang; Mellor, David; Duan, Liqiong

2012-01-01

Previous research suggests that there is a relationship between social contexts (e.g., economic growth, engagement in wars) and motives within populations. In particular, high achievement motive is associated with subsequent economic growth, which in turn increases power motive. Increased national achievement and power motives have been argued to precede social changes that lead to decreased affiliation motives, and engagement in wars. The present study aimed to examine differences in achievement, power, and affiliation motives between 266 college students in China (a nation with sustained high economic growth) and 255 college students in the USA (a nation with previously strong but now slowing economic growth, and engaged in war). Analysis of personal strivings suggested that Chinese college students showed significantly higher levels of achievement motive than the American college students, but American college students showed significantly higher levels of affiliation motive than Chinese college students. Overall, males exhibited higher achievement motivation than females. No significant interaction effects were found for gender by location for any of the three motives. The findings are discussed in relation to previous research.

Increasing Reading Motivation in Elementary and Middle School Students through the Use of Multiple Intelligences

ERIC Educational Resources Information Center

Buschick, Mary E.; Shipton, Tracey A.; Winner, Laurie M.; Wise, Melissa D.

2007-01-01

The problem is that with each passing year it becomes increasingly harder to maintain student motivation to read and improve reading comprehension. The purpose of this project was to increase reading motivation in elementary and middle school students through the use of multiple intelligences. This project was conducted by four teacher researchers…

Attitudes toward working mothers: accommodating the needs of mothers in the work force.

PubMed

Albright, A

1992-10-01

More women, including mothers, are part of the work force than ever before. In the workplace, barriers often exist that restrict promotion and advancement of mothers. Mothers often are penalized in attempting to meet the demands of parent and worker roles. Parenting practices have been considered primarily the domain of mothers. However, nurturing may be done effectively by fathers or other motivated adults. Policies of employers must change to accommodate needs of families. Examples of supportive practices may include flexible working hours, parental leave, and on-site child care.

Decreased prefrontal cortical sensitivity to monetary reward is associated with impaired motivation and self-control in cocaine addiction

PubMed Central

Goldstein, Rita Z.; Alia-Klein, Nelly; Tomasi, Dardo; Zhang, Lei; Cottone, Lisa A.; Maloney, Thomas; Telang, Frank; Caparelli, Elisabeth C.; Chang, Linda; Ernst, Thomas; Samaras, Dimitris; Squires, Nancy K.; Volkow, Nora D.

2008-01-01

Objective To examine the brain’s sensitivity to monetary rewards of different magnitudes in cocaine abusers and to study its association with motivation and self-control. Method Sixteen cocaine abusers and 13 matched healthy comparison subjects performed a forced-choice task under three monetary value conditions while brain activation was measured with functional magnetic resonance imaging. Objective measures of state motivation were assessed by reaction time and accuracy, and subjective measures were assessed by self-reports of task engagement. Measures of trait motivation and self-control were assessed with the Multidimensional Personality Questionnaire. Results The cocaine abusers demonstrated an overall reduced regional brain responsivity to differences between the monetary value conditions. Also, in comparison subjects but not in cocaine abusers reward-induced improvements in performance were associated with self-reports of task engagement, and money-induced activations in the lateral prefrontal cortex were associated with activations in the orbitofrontal cortex. For cocaine subjects, prefrontal cortex sensitivity to money was instead associated with motivation and self-control. Conclusions These findings suggest that in cocaine addiction (1) activation of the corticolimbic reward circuit to gradations of money is altered; (2) lack of a correlation between objective and subjective measures of state motivation may be indicative of disrupted perception of motivational drive, which could contribute to impairments in self-control; and (3) the lateral prefrontal cortex modulates trait motivation and deficits in self-control, and a possible underlying mechanism may encompass a breakdown in prefrontal-orbitofrontal cortical communication. PMID:17202543

Catastrophe Theory: A Unified Model for Educational Change.

ERIC Educational Resources Information Center

Cryer, Patricia; Elton, Lewis

1990-01-01

Catastrophe Theory and Herzberg's theory of motivation at work was used to create a model of change that unifies and extends Lewin's two separate stage and force field models. This new model is used to analyze the behavior of academics as they adapt to the changing university environment. (Author/MLW)

Marketing Education in the Postmodern Age.

ERIC Educational Resources Information Center

Kenway, Jane; And Others

1993-01-01

In Australia, education is expected to serve national and international market economies and is being steered by market forces within and beyond education. Recent forms of education markets raise social-justice issues inadequately treated in literature. Markets operate according to profit motive and are not premised on equality or fairness…

Value from Hedonic Experience and Engagement

ERIC Educational Resources Information Center

Higgins, E. Tory

2006-01-01

Recognizing that value involves experiencing pleasure or pain is critical to understanding the psychology of value. But hedonic experience is not enough. I propose that it is also necessary to recognize that strength of engagement can contribute to experienced value through its contribution to the experience of motivational force--an experience of…

Self-Esteem: A Model.

ERIC Educational Resources Information Center

Steffenhagen, R. A.

Alfred Adler's Individual Psychology theory is actually a theory of self-esteem psychology. For Adler the most important motivating force for behavior is a striving for superiority. A self-esteem theory of deviance was developed with the underlying proposition being that low self-esteem is the basic psychodynamic mechanism underlying deviance. For…

Enhancing Higher Learning through Engagement in Community and Human Development

ERIC Educational Resources Information Center

Mason, Ronald, Jr.

2006-01-01

Universities are structurally constrained from engaging in community development. Traditional concepts of teaching, research, and service make it difficult to focus on the needs of the community as a motivating force in the higher learning process. Historically black public universities, however, may have fewer such constraints than large private…

Predeployment Motivation and Ambivalence Among Canadian Forces Augmentees: The Influence of Demographic Factors

DTIC Science & Technology

2003-12-01

consequences (pp. 361-386). Hillsdale, NJ: Erlbaum. 31. Conner, M., Sherlock , K., & Orbell, S. (1998). Psychosocial detreminant5s of ecstasy use in young...donate. Health Psychology, 5, 565-580. 35. Thompson, M. M. & Holmes , J. G., (1996). Ambivalence in Close Relationships: Conflicted cognitions as a

Service Quality in Higher Education Using an Enhanced SERVQUAL Approach

ERIC Educational Resources Information Center

Tan, Kay C.; Kek, Sei W.

2004-01-01

Customer service and quality are driving forces in the business community. As higher educational institutions tussle for competitive advantage and high service quality, the evaluation of educational service quality is essential to provide motivation for and to give feedback on the effectiveness of educational plans and implementation. This…

The Secret Siphon

ERIC Educational Resources Information Center

Hughes, Stephen W.

2011-01-01

Although the siphon has been in use since ancient times, the exact mechanism of operation is still under discussion. For example, most dictionaries assert that atmospheric pressure is essential to the operation of a siphon rather than gravity. Although there is general agreement that gravity is the motivating force in a siphon, there is…

Annotated Bibliography on Relative Motion

DTIC Science & Technology

1992-03-01

displace the sheave, and motive means operating the power ram. Preferably, the power run is subjected to i constant upward pneumatic force to provide...NCIEI- Report N- 1187 (Oct 1971). The theory is de\\ eloped for the swinging rmotion induced in a wire suspended load due to the hori7zontal motion of a

A Comparison of Transpersonal, Wholistic, and Other Major Counseling Theories.

ERIC Educational Resources Information Center

Peterson, J. Vincent; Nisenholz, Bernard

Transpersonal Counseling and Wholistic Counseling are two relatively new approaches to psychotherapy. Transpersonal counseling is based on the work of transpersonal psychologists who believe that there are potential cognitive, moral, and motivational stages of development beyond those reached by most adults. It suggests a "fourth force"…

A steep cline in Pinus muricata

Treesearch

Constance I. Millar

1983-01-01

Clines, including hybrid zones, have long been studied empirically and theoretically, especially for the opportunity they present to study evolutionary forces (Sumner, 1929; Haldane, 1948; Barber and Jackson, 195 7). Recent theoretical studies have emphasized that clines may be important in speciation (summarized in Endler, 1977). This emphasis has motivated...

Motivational "spill-over" during weight control: increased self-determination and exercise intrinsic motivation predict eating self-regulation.

PubMed

Mata, Jutta; Silva, Marlene N; Vieira, Paulo N; Carraça, Eliana V; Andrade, Ana M; Coutinho, Sílvia R; Sardinha, Luis B; Teixeira, Pedro J

2009-11-01

Successful weight management relies on at least two health behaviors, eating and exercise. However, little is known about their interaction on a motivational and behavioral level. Based on the Hierarchical Model of Motivation the authors examined whether exercise-specific motivation can transfer to eating regulation during a lifestyle weight control program. The authors further investigated whether general, treatment-related, and exercise motivation underlie the relation between increased exercise and improved eating regulation. Overweight/obese women participated in a 1-year randomized controlled trial (N = 239). The intervention focused on promoting physical activity and internal motivation for exercise and weight loss, following Self-Determination Theory. The control group received general health education. General and exercise specific self-determination, eating self-regulation variables, and physical activity behavior. General self-determination and more autonomous exercise motivation predicted eating self-regulation over 12 months. Additionally, general and exercise self-determination fully mediated the relation between physical activity and eating self-regulation. Increased general self-determination and exercise motivation seem to facilitate improvements in eating self-regulation during weight control in women. These motivational mechanisms also underlie the relationship between improvements in exercise behavior and eating regulation. PsycINFO Database Record (c) 2009 APA, all rights reserved.

Motivational Interviewing to prevent dropout from an education and employment program for young adults: A randomized controlled trial.

PubMed

Sayegh, Caitlin S; Huey, Stanley J; Barnett, Elizabeth; Spruijt-Metz, Donna

2017-07-01

This study tested the efficacy of Motivational Interviewing for improving retention at a "second chance" program in the United States for unemployed young adults who had not graduated high school (ages 18-24; 60% male). We investigated how Motivational Interviewing effects might be mediated by change talk (i.e., arguments for change) and moderated by preference for consistency (PFC). Participants (N = 100) were randomly assigned to (1) Motivational Interviewing designed to elicit change talk, (2) placebo counseling designed not to elicit change talk, or (3) no additional treatment. Motivational Interviewing sessions increased change talk, but did not increase program retention or diploma earning. PFC was a significant moderator of Motivational Interviewing's impact on program retention; Motivational Interviewing was most effective at increasing 8 week retention for high PFC participants, and least effective for low PFC participants. These results suggest that Motivational Interviewing could be a useful tool for improving retention in education and employment programs, but clinicians should be attentive to how participant characteristics might enhance or diminish Motivational Interviewing effects. Copyright © 2017 The Foundation for Professionals in Services for Adolescents. Published by Elsevier Ltd. All rights reserved.

Combining motivational and volitional interventions to promote exercise participation: protection motivation theory and implementation intentions.

PubMed

Milne, Sarah; Orbell, Sheina; Sheeran, Paschal

2002-05-01

This study compared a motivational intervention based on protection motivation theory (PMT, Rogers, 1975, 1983) with the same motivational intervention augmented by a volitional intervention based on implementation intentions (Gollwitzer, 1993). The study had a longitudinal design, involving three waves of data collection over a 2-week period, incorporating an experimental manipulation of PMT variables at Time 1 and a volitional, implementation intention intervention at Time 2. Participants (N=248) were randomly allocated to a control group or one of two intervention groups. Cognitions and exercise behaviour were measured at three time-points over a 2-week period. The motivational intervention significantly increased threat and coping appraisal and intentions to engage in exercise but did not bring about a significant increase in subsequent exercise behaviour. In contrast, the combined protection motivation theory/implementation intention intervention had a dramatic effect on subsequent exercise behaviour. This volitional intervention did not influence behavioural intention or any other motivational variables. It is concluded that supplementing PMT with implementation intentions strengthens the ability of the model to explain behaviour. This has implications for health education programmes, which should aim to increase both participants' motivation and their volition.

Morphing unmanned aerial vehicles

NASA Astrophysics Data System (ADS)

Gomez, Juan Carlos; Garcia, Ephrahim

2011-10-01

Research on aircraft morphing has exploded in recent years. The motivation and driving force behind this has been to find new and novel ways to increase the capabilities of aircraft. Materials advancements have helped to increase possibilities with respect to actuation and, hence, a diversity of concepts and unimagined capabilities. The expanded role of unmanned aerial vehicles (UAVs) has provided an ideal platform for exploring these emergent morphing concepts since at this scale a greater amount of risk can be taken, as well as having more manageable fabrication and cost requirements. This review focuses on presenting the role UAVs have in morphing research by giving an overview of the UAV morphing concepts, designs, and technologies described in the literature. A presentation of quantitative information as well as a discussion of technical issues is given where possible to begin gaining some insight into the overall assessment and performance of these technologies.

An update on the regulation of photosynthesis by thylakoid ion channels and transporters in Arabidopsis.

PubMed

Spetea, Cornelia; Herdean, Andrei; Allorent, Guillaume; Carraretto, Luca; Finazzi, Giovanni; Szabo, Ildikò

2017-09-01

In natural, variable environments, plants rapidly adjust photosynthesis for optimal balance between light absorption and utilization. There is increasing evidence suggesting that ion fluxes across the chloroplast thylakoid membrane play an important role in this regulation by affecting the proton motive force and consequently photosynthesis and thylakoid membrane ultrastructure. This article presents an update on the thylakoid ion channels and transporters characterized in Arabidopsis thaliana as being involved in these processes, as well as an outlook at the evolutionary conservation of their functions in other photosynthetic organisms. This is a contribution to shed light on the thylakoid network of ion fluxes and how they help plants to adjust photosynthesis in variable light environments. © 2017 Scandinavian Plant Physiology Society.

Aggress to impress: hostility as an evolved context-dependent strategy.

PubMed

Griskevicius, Vladas; Tybur, Joshua M; Gangestad, Steven W; Perea, Elaine F; Shapiro, Jenessa R; Kenrick, Douglas T

2009-05-01

Given the high costs of aggression, why have people evolved to act aggressively? Comparative biologists have frequently observed links between aggression, status, and mating in nonhuman animals. In this series of experiments, the authors examined the effects of status, competition, and mating motives on men's and women's aggression. For men, status motives increased direct aggression (face-to-face confrontation). Men's aggression was also boosted by mating motives, but only when observers were other men. For women, both status and mating motives increased indirect aggression (e.g., socially excluding the perpetrator). Although neither status nor mating motives increased women's direct aggression, women did become more directly aggressive when motivated to compete for scarce resources. These context- and sex-specific effects on human aggression contribute to a broader understanding of the functional nature of aggressive behavior. Copyright (c) 2009 APA, all rights reserved.

Building Motivation in African American Caregivers of Adolescents With Obesity: Application of Sequential Analysis.

PubMed

Jacques-Tiura, Angela J; Carcone, April Idalski; Naar, Sylvie; Brogan Hartlieb, Kathryn; Albrecht, Terrance L; Barton, Ellen

2017-03-01

We sought to examine communication between counselors and caregivers of adolescents with obesity to determine what types of counselor behaviors increased caregivers' motivational statements regarding supporting their child's weight loss. We coded 20-min Motivational Interviewing sessions with 37 caregivers of African American 12-16-year-olds using the Minority Youth Sequential Coding for Observing Process Exchanges. We used sequential analysis to determine which counselor communication codes predicted caregiver motivational statements. Counselors' questions to elicit motivational statements and emphasis on autonomy increased the likelihood of both caregiver change talk and commitment language statements. Counselors' reflections of change talk predicted further change talk, and reflections of commitment language predicted more commitment language. When working to increase motivation among caregivers of adolescents with overweight or obesity, providers should strive to reflect motivational statements, ask questions to elicit motivational statements, and emphasize caregivers' autonomy. © The Author 2016. Published by Oxford University Press on behalf of the Society of Pediatric Psychology. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com

Perceived Threat Associated with Police Officers and Black Men Predicts Support for Policing Policy Reform

PubMed Central

Skinner, Allison L.; Haas, Ingrid J.

2016-01-01

Racial disparities in policing and recent high-profile incidents resulting in the deaths of Black men have ignited a national debate on policing policies. Given evidence that both police officers and Black men may be associated with threat, we examined the impact of perceived threat on support for reformed policing policies. Across three studies we found correlational evidence that perceiving police officers as threatening predicts increased support for reformed policing practices (e.g., limiting the use of lethal force and matching police force demographics to those of the community). In contrast, perceiving Black men as threatening predicted reduced support for policing policy reform. Perceived threat also predicted willingness to sign a petition calling for police reform. Experimental evidence indicated that priming participants to associate Black men with threat could also reduce support for policing policy reform, and this effect was moderated by internal motivation to respond without prejudice. Priming participants to associate police officers with threat did not increase support for policing policy reform. Results indicate that resistance to policing policy reform is associated with perceiving Black men as threatening. Moreover, findings suggest that publicizing racially charged police encounters, which may conjure associations between Black men and threat, could reduce support for policing policy reform. PMID:27462294

What is this Motivation?

ERIC Educational Resources Information Center

Waters, T. R.

1971-01-01

Maslow's Hierarchial Theory, Mcgregor's X & Y Theory, and Hertsberg's Hygiene Theory all based on motivation, are examined as to their effectiveness to increase worker production. The author feels management should not concentrate on motivation and offers his own theory, Spiral Web Theory, to help increase employee productiveness. (RB)

A Daily Diary Study of Reading Motivation inside and outside of School: A Dynamic Approach to Motivation to Read

ERIC Educational Resources Information Center

Neugebauer, Sabina Rak

2013-01-01

Qualitative literacy motivation research increasingly documents students' divergent motivations to read in and outside of the school setting. However, commonly used assessments of literacy motivation do not measure the contribution of in-school and outside-school settings to students' motivation to read. Consequently, quantitative research has not…

Locomotor Adaptation to an Asymmetric Force on the Human Pelvis Directed Along the Right Leg.

PubMed

Vashista, Vineet; Martelli, Dario; Agrawal, Sunil

2015-09-11

In this work, we study locomotor adaptation in healthy adults when an asymmetric force vector is applied to the pelvis directed along the right leg. A cable-driven Active Tethered Pelvic Assist Device (A-TPAD) is used to apply an external force on the pelvis, specific to a subject's gait pattern. The force vector is intended to provide external weight bearing during walking and modify the durations of limb supports. The motivation is to use this paradigm to improve weight bearing and stance phase symmetry in individuals with hemiparesis. An experiment with nine healthy subjects was conducted. The results show significant changes in the gait kinematics and kinetics while the healthy subjects developed temporal and spatial asymmetry in gait pattern in response to the applied force vector. This was followed by aftereffects once the applied force vector was removed. The adaptation to the applied force resulted in asymmetry in stance phase timing and lower limb muscle activity. We believe this paradigm, when extended to individuals with hemiparesis, can show improvements in weight bearing capability with positive effects on gait symmetry and walking speed.

Effects of adolescent online gaming time and motives on depressive, musculoskeletal, and psychosomatic symptoms

PubMed Central

Nilsson, Kent W; Leppert, Jerzy; Åslund, Cecilia

2015-01-01

Aim. To investigate whether adolescent online gaming time and the additive effect of gaming motives were associated with depressive, musculoskeletal, and psychosomatic symptoms. The hypothesis was that adolescents who engage in online gaming with escape motives and increased online gaming time have higher probability for depressive, musculoskeletal, and psychosomatic symptoms compared to adolescents with other online gaming motives and/or less online gaming time. Method. An anonymous and voluntary questionnaire was completed during class hours by 7,757 Swedish adolescents aged 13–18 years. The questionnaire included demographic background, gaming habits, and depressive, musculoskeletal, and psychosomatic symptoms. Results. It was found that increased online gaming time during weekdays increased the probability of having depressive, musculoskeletal, and psychosomatic symptoms. However, these relations with time spent gaming were further explained by online gaming motives. Weekday online gaming for more than five hours a day, in combination with escape motives, was associated with an increased probability of depressive symptoms (odds ratio (OR) 4.614, 95% CI 3.230–6.590), musculoskeletal symptoms (OR 2.494, 95% CI 1.598–3.892), and psychosomatic symptoms (OR 4.437, 95% CI 2.966–6.637). The probability of ill health decreased when gaming was for fun or had social motives. Conclusion. Excessive gaming time and escape motives were found to be associated with increased probability of ill health among adolescents. Gaming motives may identify gamers in need of support to reduce unhealthy gaming behaviour as well as identify individuals at risk for ill health. PMID:26072677

Evidence for aversive withdrawal response to own errors.

PubMed

Hochman, Eldad Yitzhak; Milman, Valery; Tal, Liron

2017-10-01

Recent model suggests that error detection gives rise to defensive motivation prompting protective behavior. Models of active avoidance behavior predict it should grow larger with threat imminence and avoidance. We hypothesized that in a task requiring left or right key strikes, error detection would drive an avoidance reflex manifested by rapid withdrawal of an erring finger growing larger with threat imminence and avoidance. In experiment 1, three groups differing by error-related threat imminence and avoidance performed a flanker task requiring left or right force sensitive-key strikes. As predicted, errors were followed by rapid force release growing faster with threat imminence and opportunity to evade threat. In experiment 2, we established a link between error key release time (KRT) and the subjective sense of inner-threat. In a simultaneous, multiple regression analysis of three error-related compensatory mechanisms (error KRT, flanker effect, error correction RT), only error KRT was significantly associated with increased compulsive checking tendencies. We propose that error response withdrawal reflects an error-withdrawal reflex. Copyright © 2017 Elsevier B.V. All rights reserved.

Changes in Intrinsic Motivation as a Function of Negative Feedback and Threats.

ERIC Educational Resources Information Center

Deci, Edward L.; Cascio, Wayne F.

Recent studies have demonstrated that external rewards can affect intrinsic motivation to perform an activity. Money tends to decrease intrinsic motivation, whereas positive verbal reinforcements tend to increase intrinsic motivation. This paper presents evidence that negative feedback and threats of punishment also decrease intrinsic motivation.…

Transcriptomic Analysis of Carboxylic Acid Challenge in Escherichia coli: Beyond Membrane Damage

PubMed Central

Royce, Liam A.; Boggess, Erin; Fu, Yao; Liu, Ping; Shanks, Jacqueline V.; Dickerson, Julie; Jarboe, Laura R.

2014-01-01

Carboxylic acids are an attractive biorenewable chemical. Enormous progress has been made in engineering microbes for production of these compounds though titers remain lower than desired. Here we used transcriptome analysis of Escherichia coli during exogenous challenge with octanoic acid (C8) at pH 7.0 to probe mechanisms of toxicity. This analysis highlights the intracellular acidification and membrane damage caused by C8 challenge. Network component analysis identified transcription factors with altered activity including GadE, the activator of the glutamate-dependent acid resistance system (AR2) and Lrp, the amino acid biosynthesis regulator. The intracellular acidification was quantified during exogenous challenge, but was not observed in a carboxylic acid producing strain, though this may be due to lower titers than those used in our exogenous challenge studies. We developed a framework for predicting the proton motive force during adaptation to strong inorganic acids and carboxylic acids. This model predicts that inorganic acid challenge is mitigated by cation accumulation, but that carboxylic acid challenge inverts the proton motive force and requires anion accumulation. Utilization of native acid resistance systems was not useful in terms of supporting growth or alleviating intracellular acidification. AR2 was found to be non-functional, possibly due to membrane damage. We proposed that interaction of Lrp and C8 resulted in repression of amino acid biosynthesis. However, this hypothesis was not supported by perturbation of lrp expression or amino acid supplementation. E. coli strains were also engineered for altered cyclopropane fatty acid content in the membrane, which had a dramatic effect on membrane properties, though C8 tolerance was not increased. We conclude that achieving higher production titers requires circumventing the membrane damage. As higher titers are achieved, acidification may become problematic. PMID:24586888

Fluid sampling system for a nuclear reactor

DOEpatents

Lau, Louis K.; Alper, Naum I.

1994-01-01

A system of extracting fluid samples, either liquid or gas, from the interior of a nuclear reactor containment utilizes a jet pump. To extract the sample fluid, a nonradioactive motive fluid is forced through the inlet and discharge ports of a jet pump located outside the containment, creating a suction that draws the sample fluid from the containment through a sample conduit connected to the pump suction port. The mixture of motive fluid and sample fluid is discharged through a return conduit to the interior of the containment. The jet pump and means for removing a portion of the sample fluid from the sample conduit can be located in a shielded sample grab station located next to the containment. A non-nuclear grade active pump can be located outside the grab sampling station and the containment to pump the nonradioactive motive fluid through the jet pump.

Fluid sampling system for a nuclear reactor

DOEpatents

Lau, L.K.; Alper, N.I.

1994-11-22

A system of extracting fluid samples, either liquid or gas, from the interior of a nuclear reactor containment utilizes a jet pump. To extract the sample fluid, a nonradioactive motive fluid is forced through the inlet and discharge ports of a jet pump located outside the containment, creating a suction that draws the sample fluid from the containment through a sample conduit connected to the pump suction port. The mixture of motive fluid and sample fluid is discharged through a return conduit to the interior of the containment. The jet pump and means for removing a portion of the sample fluid from the sample conduit can be located in a shielded sample grab station located next to the containment. A non-nuclear grade active pump can be located outside the grab sampling station and the containment to pump the nonradioactive motive fluid through the jet pump. 1 fig.

The work motivations of mothers with preschool children.

PubMed

Cotton, S; Antill, J K; Cunningham, J D

1989-06-01

This article provides a qualitative and quantitative analysis of the motivations for employment among a sample of 166 Sydney mothers, each of whom had at least 1 preschool-aged child. Mothers with high and moderate work attachment indicated a multiplicity of motives, of both an extrinsic (financial) and intrinsic (personal satisfaction, sense of achievement) nature. In contrast, the majority of women with low work attachment cited extreme financial need as the only possible reason that would impel them to enter the labor force. When asked which was, or would be, their most important reason for working, women with high work attachment endorsed more nonfinancial than financial reasons, women with moderate work attachment were about equally likely to give either reason, and women with low work attachment predominantly gave financial reasons. Husbands' perceptions of the reasons their wives were working, or would work, showed some, but not complete, agreement with those of their wives.

Dissociating motivational direction and affective valence: specific emotions alter central motor processes.

PubMed

Coombes, Stephen A; Cauraugh, James H; Janelle, Christopher M

2007-11-01

We aimed to clarify the relation between affective valence and motivational direction by specifying how central and peripheral components of extension movements are altered according to specific unpleasant affective states. As predicted, premotor reaction time was quicker for extension movements initiated during exposure to attack than for extension movements initiated during exposure to all other valence categories (mutilation, erotic couples, opposite-sex nudes, neutral humans, household objects, blank). Exposure to erotic couples and mutilations yielded greater peak force than exposure to images of attack, neutral humans, and household objects. Finally, motor reaction time and peak electromyographic amplitude were not altered by valence. These findings indicate that unpleasant states do not unilaterally prime withdrawal movements, and that the quick execution of extension movements during exposure to threatening images is due to rapid premotor, rather than motor, reaction time. Collectively, our findings support the call for dissociating motivational direction and affective valence.

From needs to goals and representations: Foundations for a unified theory of motivation, personality, and development.

PubMed

Dweck, Carol S

2017-11-01

Drawing on both classic and current approaches, I propose a theory that integrates motivation, personality, and development within one framework, using a common set of principles and mechanisms. The theory begins by specifying basic needs and by suggesting how, as people pursue need-fulfilling goals, they build mental representations of their experiences (beliefs, representations of emotions, and representations of action tendencies). I then show how these needs, goals, and representations can serve as the basis of both motivation and personality, and can help to integrate disparate views of personality. The article builds on this framework to provide a new perspective on development, particularly on the forces that propel development and the roles of nature and nurture. I argue throughout that the focus on representations provides an important entry point for change and growth. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

Situational and respondent-level motives for drinking and alcohol-related aggression: a multilevel analysis of drinking events in a sample of Canadian university students.

PubMed

Mihic, Ljiljana; Wells, Samantha; Graham, Kathryn; Tremblay, Paul F; Demers, Andrée

2009-03-01

Situational drinking motives (i.e., motives specific to the drinking situation) as well as respondent-level drinking motives (i.e., usual drinking motives across drinking situations) were examined in terms of their relations with aggression experienced by university students. Secondary, multi-level analyses were conducted on the Canadian Campus Survey (CCS), a national survey of 40 Canadian universities conducted between March 1 and April 30, 2004 (N=6,282). For their three most recent drinking events, students reported their motive for drinking (i.e., situational motive) and whether they had an argument/fight. Respondent-level drinking motives were computed by averaging motives across drinking events. Drinking to cope at the situational-level increased the likelihood of aggression. Respondent-level enhancement motives also increased the risk of aggression. Aesthetic motives were important at both situational and respondent levels decreasing the risk for alcohol-related aggression. Gender did not moderate these relations. These results suggest that prevention programming might benefit from a focus on altering drinking motives, or their underlying causes, in order to reduce alcohol-related aggression among young adults.

Self-Initiated Development of Leadership Capabilities: Toward Establishing the Validity of Key Motivational Constructs and Assessment Tools

DTIC Science & Technology

2010-11-01

such as pay increases, promotions, increases in leader- ship responsibility, leadership performance /behavior ratings, and satisfaction at work. The... Vroom , 1964), self-efficacy (or expectation that one will succeed at a task) is a sub-component or direct predictor of overall motivation to perform a... satisfaction . Comparing Motivation to Lead and Motivation to Develop Leadership in Predicting Leadership Performance and Career Success In this

Trait approach motivation moderates the aftereffects of self-control

PubMed Central

Crowell, Adrienne; Kelley, Nicholas J.; Schmeichel, Brandon J.

2014-01-01

Numerous experiments have found that exercising self-control reduces success on subsequent, seemingly unrelated self-control tasks. Such evidence lends support to a strength model that posits a limited and depletable resource underlying all manner of self-control. Recent theory and evidence suggest that exercising self-control may also increase approach-motivated impulse strength. The two studies reported here tested two implications of this increased approach motivation hypothesis. First, aftereffects of self-control should be evident even in responses that require little or no self-control. Second, participants higher in trait approach motivation should be particularly susceptible to such aftereffects. In support, exercising self-control led to increased optimism (Study 1) and broadened attention (Study 2), but only among individuals higher in trait approach motivation. These findings suggest that approach motivation is an important key to understanding the aftereffects of exercising self-control. PMID:25324814

[Motivation effect on EEG spectral power and heart rate parameters in students during examination stress].

PubMed

Dzhebrailova, T D; Korobeĭnikova, I I; Rudneva, L P

2014-09-01

EEG spectral power was calculated in 24 students (18-21 years) with different levels of motivation and anxiety (tested by Spielberger) in two experimental conditions: during the common educational process and the examination stress. Before examination tests, in subjects with high motivation and anxiety level the relative delta activity power increased in right frontal (F4) brain areas. In students with medium motivation immediately before an examination the relative beta2-activity power increased in right frontal (F4) brain areas. It is suggested that delta oscillati- ons reflect activity of the defensive motivational system, whereas beta2 oscillations may be associated with the achievement motivation.

Motivation from control.

PubMed

Eitam, Baruch; Kennedy, Patrick M; Tory Higgins, E

2013-09-01

Human motivation is sensitive to value-to the outcomes of actions. People invest mental and physical resources for obtaining desired results or for stopping and reversing undesired ones. Accordingly, people's motivation is sensitive to information about their standing in relation to outcome attainment ('outcome feedback'). In this paper, we argue and present the first evidence for the existence of another motivational sensitivity in humans-a sensitivity to our degree of control on the environment and hence to information about that control ('control feedback'). We show that when actions have even trivial and constant perceptual effects, participants' motivation to perform is enhanced. We then show that increased motivation is not because more information about task performance is available and that motivation is increased only in conditions in which control over the effects can be firmly established by the mind. We speculate on the implications for understanding motivation, and potentially, physical and mental health.

Increasing Academic Growth through Motivating Students To Read.

ERIC Educational Resources Information Center

Duignan, Sandra; Klioris, Ann; Porter, Jennifer; Rockett, Nicole; Vogwill, Kathy

This report describes a program for increasing academic growth through motivating students to read. The targeted population includes kindergarten, first, third, and high school special education students. The lack of motivation in reading was documented through data revealed by pre-surveys and post-surveys of students' interest in books. Analysis…

A contact stress model for multifingered grasps of rough objects

NASA Technical Reports Server (NTRS)

Sinha, Pramath Raj; Abel, Jacob M.

1990-01-01

The model developed utilizes a contact-stress analysis of an arbitrarily shaped object in a multifingered grasp. The fingers and the object are all treated as elastic bodies, and the region of contact is modeled as a deformable surface patch. The relationship between the friction and normal forces is nonlocal and nonlinear in nature and departs from the Coulomb approximation. The nature of the constraints arising out of conditions for compatibility and static equilibrium motivated the formulation of the model as a nonlinear constrained minimization problem. The model is able to predict the magnitude of the inwardly directed normal forces and both the magnitude and direction of the tangential (friction) forces at each finger-object interface for grasped objects in static equilibrium.

A brief motivational interview promotes internal motivation to donate blood among young adults with and without a prior donation history.

PubMed

Livitz, Irina E; Fox, Kristen R; Himawan, Lina K; France, Christopher R

2017-06-01

Recruitment and retention of first-time and repeat donors is essential to maintain a stable blood supply. Recent evidence has shown that promoting internal motivation may be an effective strategy to enhance donation behavior. We tested the efficacy of an in-person motivational interview at increasing internal motivation and intention to donate. A sample of 219 donors and nondonors (69.4% female; mean ± SD age, 19.2 ± 1.1 years; 52.1% nondonors) were randomly assigned to either a motivational or a knowledge interview. Immediately before and after the interview participants completed a measure of donation intention and the Blood Donor Identity Survey, which is a multidimensional measure of donor motivation. A latent profile analysis revealed three distinct latent classes, which were identified as low internal motivation, mid internal motivation, and high internal motivation. Comparison of change in latent class from pre- to postinterview revealed that a higher proportion of participants in the motivational interview group moved to a more internally motivated class compared to the knowledge interview group (i.e., 34% vs. 4%, respectively). Further, relative to the knowledge interview group, participants in the motivational interview group reported greater increases in intention to donate. A brief motivational interview may enhance donation intention and intrinsic motivation among both experienced donors and nondonors alike. © 2017 AABB.

The creation of a healthy eating motivation score and its association with food choice and physical activity in a cross sectional sample of Irish adults.

PubMed

Naughton, Paul; McCarthy, Sinéad N; McCarthy, Mary B

2015-06-06

This study aimed to develop a healthy eating motivation score and to determine if dietary, lifestyle and activity behaviours vary across levels of motivation to eat a healthy diet with a view to informing health promotion interventions. A cross-sectional survey of food intake, physical activity, lifestyles and food choice attitudes was conducted in a nationally representative sample of 1262 adults in the Republic of Ireland aged 18 years and over. Increasing score for health motivation was significantly and positively related to healthy eating and exercise. Women, increasing age, normal BMI, regular exercise and increasing intakes of fruit and vegetables were associated with a higher odds ratio (OR) for having a high healthy eating motivation score. However, despite a high motivation score only 31% of consumers in the strong motivation group achieved the recommendations for daily fruit and vegetable consumption, while 57% achieved the fat recommendation. A higher intake of calorie dense foods from the top shelf of the food pyramid and increased time spent watching T.V. was associated with a decreased OR for positive motivation towards healthy eating. Healthy eating promotions directed at women and older adults should focus on supporting people's motivations to attain a healthy diet by addressing issues such as dietary self-control and self-regulation. For men and younger adults, healthy eating promotions will need to address the issues underlying their weak attitudes towards healthy eating.

Tan and thin? Associations between attitudes toward thinness, motives to tan and tanning behaviors in adolescent girls.

PubMed

Darlow, Susan D; Heckman, Carolyn J; Munshi, Teja

2016-07-01

Tanning during adolescence increases skin cancer risk. Relatively few studies have examined the association between thinness attitudes and tanning attitudes and behaviors. The purpose of the current study was to examine psychosocial predictors of sunbathing and tanning bed use, specifically thin ideal internalization (TII) and motives for tanning among high school girls. Adolescent girls (N = 229) completed a 10-minute questionnaire designed to assess sunbathing and indoor tanning, TII and motives to tan (appearance, social and well-being). Hierarchical regression analyses showed that TII, β = .05, p < .05, appearance motives, β = .11, p < .01 and well-being motives, β = .11, p < .01 were all independently positively associated with sunbathing. Social motives were negatively associated with sunbathing, β = -.07, p < .05. A three-way interaction was found between the three types of motives on indoor tanning, in that appearance and well-being motives interacted to increase indoor tanning levels, especially among those who strongly endorsed social motives for tanning, β = .22, p < .05. Motives for tanning, specifically those associated with appearance and well-being, can interact to increase tanning bed use. When designing tailored interventions for skin cancer prevention in young people, researchers should consider tailoring based on motivation. Researchers and healthcare professionals who work with adolescents should attend to tanners who are motivated for both appearance and mood-related reasons, as they may be most at risk for tanning dependence and skin cancer.

Smoker Identity Development among Adolescents who Smoke

PubMed Central

Hertel, Andrew W.; Mermelstein, Robin J.

2016-01-01

Adolescents who smoke are more likely to escalate their smoking frequency if they believe smoking is self-defining. Knowing factors that are associated with development of a smoker identity among adolescents who smoke may help to identify who will become a regular smoker. We investigated whether smoker identity development is associated with internal and external motives for smoking. For comparison, we also investigated whether social smoker identity development is associated with internal and external motives for smoking. Adolescents who smoke (n = 292) completed measures of smoker and social smoker identity, internal motives for smoking (negative affect coping, positive affect enhancement), and external motives for smoking (social fit) at baseline, 6-, 15-, and 24-month assessments of an ongoing longitudinal study of smoking patterns. We examined whether change in smoker and social smoker identity from 6 to 24 months was associated with change in motives at earlier assessment waves. We also explored whether gender moderated these relationships. Increases in negative affect coping motives were associated with smoker identity development among both males and females. Increases in social motives were associated with smoker identity development among males, and increases in negative affect coping motives were associated with social smoker identity development among females. Smoker and social smoker identities are signaled by negative affect coping as well as social motives for smoking. PMID:27136374

Twenty Strategies to Increase Student Motivation. Information Capsule. Volume 0907

ERIC Educational Resources Information Center

Blazer, Christie

2010-01-01

Keeping students interested in school and motivating them to succeed are challenges that even the most experienced teachers face every year. A host of student variables can lead to low levels of motivation, but research indicates that educational settings also influence motivation levels. Some studies have found that motivation is a stronger…

Examining the Prediction of Reading Comprehension on Different Multiple-Choice Tests

ERIC Educational Resources Information Center

Andreassen, Rune; Braten, Ivar

2010-01-01

In this study, 180 Norwegian fifth-grade students with a mean age of 10.5 years were administered measures of word recognition skills, strategic text processing, reading motivation and working memory. Six months later, the same students were given three different multiple-choice reading comprehension measures. Based on three forced-order…

"SOAR" to the Stars through Revising.

ERIC Educational Resources Information Center

Johnson, Jan

1995-01-01

Explains how a teacher uses the acronym SOAR (Sentences Organized and Revised) as the core of a game designed to motivate a class to revise their work through the promise of popcorn, free time, or snacks for their revision work. Describes a worksheet that forces students to pay attention to various parts of their paper. (TB)

Rand Symposium on Pilot Training and the Pilot Career; Recollections of the Chairman.

ERIC Educational Resources Information Center

Stewart, W. A.

Topics discussed in this 1970 symposium included the economics of flight training, careers in flying, college versus high school graduates, defining the trained pilot, motivation and selection, innovation in pilot training, training goals, transfer of training, and the role of simulators. Conferees agreed that the present Air Force undergraduate…

On-Site Field-Feeding Waste to Energy Converter

DTIC Science & Technology

2008-12-01

fundamentals The feedstock and part of the air needed for gasifica- tion enter through the open top of the downdraft gasifier. The motive force for the air...combustion air before entering the TQG, where the gas/air mixture is compressed by the turbocharger and distributed to the cylinders. The amount of JP-8

Developing Guidelines for IRM: A Grassroots Process in a Decentralized Environment.

ERIC Educational Resources Information Center

Balkan, Lore; Sheldon, Philip

1990-01-01

The offices of Information Resource Management and Institutional Research at Virginia Tech developed a set of guidelines for information management. This article describes the historical evolution, the forces that motivated the development of the guidelines, and the consensus-building activities that led to the acceptance of the guidelines.…

Future Time Perspective in Sociocultural Contexts: A Discussion Paper

ERIC Educational Resources Information Center

Phan, Huy P.

2009-01-01

Future time perspective (FTP) serves as a strong motivational force for individuals to engage in activities that may be instrumental in future outcomes. There has been a voluminous body of research studies, to date, that explored the importance of FTP. This article discusses FTP from sociocultural perspectives. Based on previous empirical…

Generation of the membrane potential and its impact on the motility, ATP production and growth in Campylobacter jejuni

USDA-ARS?s Scientific Manuscript database

The generation of an electrical membrane potential (''), the major constituent of the proton motive force (pmf) is crucial for the ATP synthesis, bacterial growth and motility. The pmf drives the rotation of flagella and is vital for the microaerophilic human pathogen Campylobacter jejuni to coloniz...

The Resiliency of Children and Spirituality: A Practical Theological Reflection

ERIC Educational Resources Information Center

Dillen, Annemie

2012-01-01

Resilience is described by Richardson as "the motivational force within everyone that drives them to pursue wisdom, self-actualisation, and altruism and to be in harmony with a spiritual source of strength". The author discusses this view from a Christian theological perspective and in reference to the debate concerning the self-actualisation…

Teaching with Autoharps in the 21st Century

ERIC Educational Resources Information Center

Birnie, Rebecca A.

2014-01-01

The excitement of playing an instrument is one of the greatest motivating forces in teaching general music to students. The autoharp, which may be long forgotten in the general music classrooms of the 21st century, is an ideal instrument to "re-introduce" to students. The teaching of a traditional folk instrument provides advantages for…

The Relationship of Learning Traits, Motivation and Performance-Learning Response Dynamics

ERIC Educational Resources Information Center

Hwang, Wu-Yuin; Chang, Chen-Bin; Chen, Gan-Jung

2004-01-01

This paper proposes a model of learning dynamics and learning energy, one that analyzes learning systems scientifically. This model makes response to the learner action by means of some equations relating to learning dynamics, learning energy, learning speed, learning force, and learning acceleration, which is analogous to the notion of Newtonian…

Will America Choose High Skills or Low Wages?

ERIC Educational Resources Information Center

Magaziner, Ira; Clinton, Hillary Rodham

1992-01-01

To compete more effectively in the global economy, the U.S. must reorganize the way people work in stores, factories, and elsewhere. Two factors hinder production of a highly educated work force: lack of a clear standard of achievement and insufficient student motivation. A new educational performance standard (Certificate of Initial Mastery) is…

"Fleshing Out Consensus": Radical Pragmatism, Civil Rights, and the Algebra Project

ERIC Educational Resources Information Center

Wahman, Jessica

2009-01-01

It has been said that pragmatism's "merely instrumental" truths fail to motivate radical change whereas absolute ideals make excellent guiding and driving forces for justice. However, in "Radical Equations: Math Literacy and Civil Rights," Robert Moses speaks of the radical success of pragmatic principles, used in the Civil Rights Movement, that…

"Water as Rough as an Elephant's Foot..." Learning Geography through Poetry Writing at KS2.

ERIC Educational Resources Information Center

Cunningham, Peter

2000-01-01

Describes how bilingual fourth and fifth graders at one London elementary school learned geography by writing poetry. This effort involved: engaging with the topic, consolidating knowledge and understanding, and extending knowledge and understanding. Children were highly motivated to learn. Poetry was the driving force behind their learning as…

Cyclodextrin-based microcapsules as bioreactors for ATP biosynthesis.

PubMed

Li, Jian-Hu; Wang, Yi-Fu; Ha, Wei; Liu, Yan; Ding, Li-Sheng; Li, Bang-Jing; Zhang, Sheng

2013-09-09

A biomimetic energy converter was fabricated via the assembly of CF0F1-ATPase on lipid-coated hollow nanocapsules composed of α-cyclodextrins/chitosan-graft-poly(ethylene glycol) methacrylate. Upon entrapped GOD into these capsules, the addition of glucose could trigger proton-motive force and then drive the rotation of ATPase to synthesize ATP.

Merck's Open Letters and the Teaching of Ethos

ERIC Educational Resources Information Center

Griffin, Frank

2009-01-01

In fall 2004, Merck faced a significant threat to the company's public image because of the withdrawal of VIOXX, and Merck executives were forced to defend the company's actions, its motivation for those actions, and its reputation. Confronted with enormous rhetorical challenges, Merck tried to generate public goodwill toward the company by…

Profiles of For-Profit Education Management Companies: Sixth Annual Report. 2003-2004.

ERIC Educational Resources Information Center

Molnar, Alex; Wilson, Glen; Allen, Daniel

2004-01-01

The for-profit management of public schools by for-profit corporations continues to be a controversial innovation. Proponents argue for-profit schools will result in educational improvement by harnessing the profit seeking motive of the marketplace. Competition, they maintain, forces companies to earn their profits by reducing administrative…

Scratching the Surface

ERIC Educational Resources Information Center

Bartholomeo, Linda

2011-01-01

The drab, cold days of winter were not helping to motivate the author's painting students. Still-life work appeared forced, tight, and overworked. A downed white birch in her front yard provided the author a resource and inspiration. In this article, students do some timed gestural drawings of still life using sticks as paintbrushes. (Contains 1…

A Quantitative Investigation of Prospective Teachers' Hopes and Their Motivational Forces

ERIC Educational Resources Information Center

Eren, Altay; Yesilbursa, Amanda

2017-01-01

The present study aimed to investigate the diverse aspects of prospective teachers' dispositional hopes, teaching-specific hopes, and their sources, as well as to explore whether these would significantly predict their preparation for the teaching profession. A total of 851 prospective teachers voluntarily participated in the study. A series of…

Boosting the Potency of Resistance: Combining the Motivational Forces of Inoculation and Psychological Reactance

ERIC Educational Resources Information Center

Miller, Claude H.; Ivanov, Bobi; Sims, Jeanetta; Compton, Josh; Harrison, Kylie J.; Parker, Kimberly A.; Parker, James L.; Averbeck, Joshua M.

2013-01-01

The efficacy of inoculation theory has been confirmed by decades of empirical research, yet optimizing its effectiveness remains a vibrant line of investigation. The present research turns to psychological reactance theory for a means of enhancing the core mechanisms of inoculation--threat and refutational preemption. Findings from a multisite…

Using Sports and Physical Education to Strengthen Reading Skills.

ERIC Educational Resources Information Center

Gentile, Lance M.

Written primarily for coaches and physical education instructors, this booklet also may be used by reading teachers to diversify their programs and motivate students to read. The ideas and exercises presented are intended to combine the forces of intellectual and physical activity and have been developed through actual teaching. Chapters discuss…

A Sociocultural View of Language Learning: The Importance of Meaning-Based Instruction

ERIC Educational Resources Information Center

Eun, Barohny; Lim, Hye-Soon

2009-01-01

The process of second-language teaching is grounded in the sociocultural theory of Vygotsky, which emphasizes meaningful interaction among individuals as the greatest motivating force in human development and learning. In this theoretical framework, the concepts of meaning and mediation are considered as the two essential elements affecting an…

Group-Based Hatred in Intractable Conflict in Israel

ERIC Educational Resources Information Center

Halperin, Eran

2008-01-01

Countless theoretical texts have been written regarding the centrality of hatred as a force that motivates intergroup conflicts. However, surprisingly, at present, almost no empirical study has been conducted either on the nature and character of group-based hatred or on its implications for conflicts. Therefore, the goal of the current work has…

Evidence that bacteriophage λ lysogens may induce in response to the proton motive force uncoupler CCCP.

PubMed

Thomason, Lynn C; Court, Donald L

2016-02-01

We describe a genetic β-galactoside reporter system using a disk diffusion assay on MacConkey Lactose agar petri plates to monitor maintenance of the bacteriophage λ prophage state and viral induction in Escherichia coli K-12. Evidence is presented that the phage λ major lytic promoters, pL and pR, are activated when cells containing the reporters are exposed to the energy poison carbonyl cyanide m-chlorophenyl hydrazine, CCCP. This uncoupler of oxidative phosphorylation inhibits ATP synthesis by collapsing the proton motive force. Expression of the λ lytic promoters in response to CCCP requires host RecA function and an autocleavable CI repressor, as does SOS induction of the λ prophage that occurs by a DNA damage-dependent pathway. λ Cro function is required for CCCP-mediated activation of the λ lytic promoters. CCCP does not induce an sfi-lacZ SOS reporter. Published by Oxford University Press on behalf of FEMS 2015. This work is written by (a) US Government employee(s) and is in the public domain in the US.

Arginine promotes Proteus mirabilis motility and fitness by contributing to conservation of the proton gradient and proton motive force

PubMed Central

Armbruster, Chelsie E; Hodges, Steven A; Smith, Sara N; Alteri, Christopher J; Mobley, Harry L T

2014-01-01

Swarming contributes to Proteus mirabilis pathogenicity by facilitating access to the catheterized urinary tract. We previously demonstrated that 0.1–20 mmol/L arginine promotes swarming on normally nonpermissive media and that putrescine biosynthesis is required for arginine-induced swarming. We also previously determined that arginine-induced swarming is pH dependent, indicating that the external proton concentration is critical for arginine-dependent effects on swarming. In this study, we utilized survival at pH 5 and motility as surrogates for measuring changes in the proton gradient (ΔpH) and proton motive force (μH+) in response to arginine. We determined that arginine primarily contributes to ΔpH (and therefore μH+) through the action of arginine decarboxylase (speA), independent of the role of this enzyme in putrescine biosynthesis. In addition to being required for motility, speA also contributed to fitness during infection. In conclusion, consumption of intracellular protons via arginine decarboxylase is one mechanism used by P. mirabilis to conserve ΔpH and μH+ for motility. PMID:25100003

Light weakly coupled axial forces: models, constraints, and projections

DOE PAGES

Kahn, Yonatan; Krnjaic, Gordan; Mishra-Sharma, Siddharth; ...

2017-05-01

Here, we investigate the landscape of constraints on MeV-GeV scale, hidden U(1) forces with nonzero axial-vector couplings to Standard Model fermions. While the purely vector-coupled dark photon, which may arise from kinetic mixing, is a well-motivated scenario, several MeV-scale anomalies motivate a theory with axial couplings which can be UV-completed consistent with Standard Model gauge invariance. Moreover, existing constraints on dark photons depend on products of various combinations of axial and vector couplings, making it difficult to isolate the e ects of axial couplings for particular flavors of SM fermions. We present a representative renormalizable, UV-complete model of a darkmore » photon with adjustable axial and vector couplings, discuss its general features, and show how some UV constraints may be relaxed in a model with nonrenormalizable Yukawa couplings at the expense of fine-tuning. We survey the existing parameter space and the projected reach of planned experiments, brie y commenting on the relevance of the allowed parameter space to low-energy anomalies in π 0 and 8Be* decay.« less

The role of personal biases in the explanation of confabulation.

PubMed

Metcalf, Kasey; Langdon, Robyn; Coltheart, Max

2010-01-01

Previous research has demonstrated that motivational forces play an important role in determining the content of confabulation. In particular the content of confabulation has been shown to contain a positive emotional bias. This study investigated the role of personal biases in the confabulations of six patients with diverse aetiologies. Confabulations were elicited with a series of structured interviews. We then compared the patients' confabulations to their actual situations. Further analyses compared confabulations about current (i.e., the postmorbid period) and past (i.e., premorbid events and general life circumstances) events. Group analysis confirmed a general bias to recall events that were more positive than the reality. However, examination of individual cases revealed that positive biases were not universal. Confabulations about current circumstances showed the positive bias, whereas an emotional bias was not evident in past confabulations. We conclude that motivational forces play a role in determining the content of confabulations but conceive of this role primarily in terms of a need to maintain a consistent self-concept (whether positive or negative) overlaid upon the ease with which an individual can retrieve familiar premorbid daily activities and routines.

Light weakly coupled axial forces: models, constraints, and projections

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

Kahn, Yonatan; Krnjaic, Gordan; Mishra-Sharma, Siddharth

Here, we investigate the landscape of constraints on MeV-GeV scale, hidden U(1) forces with nonzero axial-vector couplings to Standard Model fermions. While the purely vector-coupled dark photon, which may arise from kinetic mixing, is a well-motivated scenario, several MeV-scale anomalies motivate a theory with axial couplings which can be UV-completed consistent with Standard Model gauge invariance. Moreover, existing constraints on dark photons depend on products of various combinations of axial and vector couplings, making it difficult to isolate the e ects of axial couplings for particular flavors of SM fermions. We present a representative renormalizable, UV-complete model of a darkmore » photon with adjustable axial and vector couplings, discuss its general features, and show how some UV constraints may be relaxed in a model with nonrenormalizable Yukawa couplings at the expense of fine-tuning. We survey the existing parameter space and the projected reach of planned experiments, brie y commenting on the relevance of the allowed parameter space to low-energy anomalies in π 0 and 8Be* decay.« less

Characteristics of trajectory in the migration of Amoeba proteus.

PubMed

Miyoshi, Hiromi; Masaki, Noritaka; Tsuchiya, Yoshimi

2003-01-01

We investigated the behavior of migration of Amoeba proteus in an isotropic environment. We found that the trajectory in the migration of A. proteus is smooth in the observation time of 500-1000 s, but its migration every second (the cell velocity) on the trajectory randomly changes. Stochastic analysis of the cell velocity and the turn angle of the trajectory has shown that the histograms of the both variables well fit to Gaussian curves. Supposing a simple model equation for the cell motion, we have estimated the motive force of the migrating cell, which is of the order of piconewton. Furthermore, we have found that the cell velocity and the turn angle have a negative cross-correlation coefficient, which suggests that the amoeba explores better environment by changing frequently its migrating direction at a low speed and it moves rectilinearly to the best environment at a high speed. On the other hand, the model equation has simulated the negative correlation between the cell velocity and the turn angle. This indicates that the apparently rational behavior comes from intrinsic characteristics in the dynamical system where the motive force is not torquelike.

A motivational interview promotes retention of blood donors with high internal motivation.

PubMed

France, Christopher R; France, Janis L; Carlson, Bruce W; Himawan, Lina K; Kessler, Debra A; Rebosa, Mark; Shaz, Beth H; Madden, Katrala; Carey, Patricia M; Slepian, P Maxwell; Ankawi, Brett; Livitz, Irina E; Fox, Kristen R

2017-10-01

Based on the hypothesis that self-determined motivation is associated with an increased likelihood of future behavior, the present study examined the ability of a motivational interview to promote internal motivation for giving blood and future donation attempts. A sample of 484 recent whole-blood and double red blood cell donors (62.4% female; age = 30.2 ± 11.8 years) were randomly assigned to either a telephone-delivered motivational interview or a control call approximately 6 weeks after donating. Several weeks before the call and again 1 week after the call, participants completed the Blood Donor Identity Survey, a multidimensional measure of donor motivation, to derive indices of amotivation, external motivation, and internal motivation to give blood. Repeat donation attempts were tracked using blood center records. Relative to controls, participants in the motivational interview group showed a shift toward more self-determined motivation, as indicated by significant decreases in amotivation (p = 0.01) and significant increases in external (p = 0.009) and internal (p = 0.002) motivation. Furthermore, those with initially high levels of autonomous motivation were more likely to make a donation attempt in the subsequent year if they completed the motivational interview (71.1%) versus the control call (55.1%). Motivational interviewing is a potentially useful strategy to enhance retention of existing blood donors, particularly among those who express a greater sense of internal motivation for giving. © 2017 AABB.

Motivation in rehabilitation and acquired brain injury: can theory help us understand it?

PubMed

Kusec, Andrea; Velikonja, Diana; DeMatteo, Carol; Harris, Jocelyn E

2018-04-25

In acquired brain injury (ABI) populations, low motivation to engage in rehabilitation is associated with poor rehabilitation outcomes. Motivation in ABI is thought to be influenced by internal and external factors. This is consistent with Self-determination Theory, which posits that motivation is intrinsic and extrinsic. This paper discusses the benefit of using Self-determination Theory to guide measurement of motivation in ABI. Using a narrative review of the Self-determination Theory literature and clinical rehabilitation research, this paper discusses the unique role intrinsic and extrinsic motivation has in healthcare settings and the importance of understanding both when providing rehabilitation in ABI. Based on the extant literature, it is possible that two independently developed measures of motivation for ABI populations, the Brain Injury Rehabilitation Trust Motivation Questionnaire-Self and the Motivation for Traumatic Brain Injury Rehabilitation Questionnaire, may assess intrinsic and extrinsic motivation, respectively. Intrinsic and extrinsic motivation in ABI may be two equally important but independent factors that could provide a comprehensive understanding of motivation in individuals with ABI. This increased understanding could help facilitate behavioural approaches in rehabilitation. Implications for Rehabilitation Conceptualization of motivation in ABI would benefit from drawing upon Self-determination Theory. External factors of motivation such as the therapeutic environment or social support should be carefully considered in rehabilitation in order to increase engagement. Assessing motivation as a dual rather than a global construct may provide more precise information about the extent to which a patient is motivated.

Retirees' motivational orientations and bridge employment: Testing the moderating role of gender.

PubMed

Zhan, Yujie; Wang, Mo; Shi, Junqi

2015-09-01

Bridge employment refers to the labor force participation after people retire from career jobs. It is becoming a prevalent phenomenon for retirees transitioning from employment to complete work withdrawal. Building on existing literature on retirement transition and older adults' work motivation, the present study examined the effects of 3 motivational orientations (i.e., status striving, communion striving, and generativity striving) in relating to retirees' bridge employment participation (i.e., bridge employment status and bridge employment work hours). This study also applied the social gender role theory to examine the effect of gender in moderating the effects of motivational orientations. Data from 507 Chinese retirees in Beijing revealed that communion striving and generativity striving were positively related to bridge employment participation. Further, gender moderated the effect of status striving such that status striving was positively related to bridge employment participation for male retirees but not for female retirees. In addition, exploratory analysis was conducted to examine the effects of the same set of motivational orientations on postretirement volunteering activities. Results showed that status striving was negatively related to volunteering after retirement. The findings are discussed in terms of their theoretical implications for the bridge employment literature and practical implications for recruiting and retaining older workers. (c) 2015 APA, all rights reserved).

Harnessing motivational forces in the promotion of physical activity: the Community Health Advice by Telephone (CHAT) project.

PubMed

King, Abby C; Friedman, Robert; Marcus, Bess; Castro, Cynthia; Forsyth, LeighAnn; Napolitano, Melissa; Pinto, Bernardine

2002-10-01

Physical inactivity among middle- and older-aged adults is pervasive, and is linked with numerous chronic conditions that diminish health and functioning. Counselor-directed physical activity programs may enhance extrinsic motivation (reflected in social influence theories, such as self-presentation theory) and, in turn, physical activity adherence, while the counselor is in charge of program delivery. However, external influences can undermine intrinsic motivation, making it more difficult to maintain physical activity once counselor-initiated contact ends. In contrast, programs that diminish the socially evaluative and controlling aspects of the counseling interchange may promote intrinsic motivation (described in cognitive evaluation theory), and, thus, physical activity maintenance, even when counselor-initiated contact ceases. The objective of the Community Health Advice by Telephone (CHAT) project is to compare these two theories by conducting a randomized controlled trial evaluating the effects of a telephone-administered counseling program delivered by a person (social influence enhancement) or computer (cognitive evaluation enhancement) on physical activity adoption and maintenance over 18 months. Healthy, sedentary adults (n = 225) aged 55 years and older are randomized to one of these programs or to a control arm. This study will contribute to advancing motivational theory as well as provide information on the sustained effectiveness of interventions with substantial public health applicability.

Factors associated with motivation and hesitation to work among health professionals during a public crisis: a cross sectional study of hospital workers in Japan during the pandemic (H1N1) 2009.

PubMed

Imai, Hissei; Matsuishi, Kunitaka; Ito, Atsushi; Mouri, Kentaro; Kitamura, Noboru; Akimoto, Keiko; Mino, Koichi; Kawazoe, Ayako; Isobe, Masanori; Takamiya, Shizuo; Mita, Tatsuo

2010-11-04

The professionalism of hospital workers in Japan was challenged by the pandemic (H1N1) 2009. To maintain hospital function under critical situations such as a pandemic, it is important to understand the factors that increase and decrease the willingness to work. Previous hospital-based studies have examined this question using hypothetical events, but so far it has not been examined in an actual pandemic. Here, we surveyed the factors that influenced the motivation and hesitation of hospital workers to work in Japan soon after the pandemic (H1N1) 2009. Self-administered anonymous questionnaires about demographic character and stress factors were distributed to all 3635 employees at three core hospitals in Kobe city, Japan and were collected from June to July, 2009, about one month after the pandemic (H1N1) in Japan. Of a total of 3635 questionnaires distributed, 1693 (46.7%) valid questionnaires were received. 28.4% (N = 481) of workers had strong motivation and 14.7% (N = 249) had strong hesitation to work. Demographic characters and stress-related questions were categorised into four types according to the odds ratios (OR) of motivation and hesitation to work: some factors increased motivation and lowered hesitation; others increased motivation only; others increased hesitation only and others increased both motivation and hesitation. The strong feeling of being supported by the national and local governments (Multivariate OR: motivation; 3.5; CI 2.2-5.4, hesitation; 0.2; CI 0.1-0.6) and being protected by hospital (Multivariate OR: motivation; 2.8; CI 2.2-3.7, hesitation; 0.5; CI 0.3-0.7) were related to higher motivation and lower hesitation. Here, protection included taking precautions to prevent illness among workers and their families, providing for the care of those who do become ill, reducing malpractice threats, and financial support for families of workers who die on duty. But 94.1% of the respondents answered protection by the national and local government was weak and 79.7% answered protection by the hospital was weak. Some factors have conflicting effects because they increase both motivation and hesitation. Giving workers the feeling that they are being protected by the national and local government and hospital is especially valuable because it increases their motivation and lowers their hesitation to work.

Construction of a dual axis force reflection stick and test station

NASA Astrophysics Data System (ADS)

Repperger, Daniel E.; Scarborough, Eric L.; Chelette, Tamara L.

1991-11-01

This report describes the construction of a dual axis force reflecting stick controller and test station which was constructed through the use of basic research funds (ILIR monies). The prototype described in this report is powered only by electric motors and used the latest technology in computers. This was an advancement over a previous prototype which involved pneumatic devices and was very large, bulky, and awkward to use. An experiment was conducted with 5 subjects as described herein to test the overall system for its use in experimental design. The motivation for developing such a small test station for the use of force reflection in stick controllers is because with this new compact and portable system, many new applications now appear for this technology. The system described herein minimizes both weight and electric power requirements to produce the same force reflection. By upgrading the technology in the components used in this test station, wider use of force reflection is now available for a host of new applications.

Tug of war in motility assay experiments

NASA Astrophysics Data System (ADS)

Hexner, Daniel; Kafri, Yariv

2009-09-01

The dynamics of two groups of molecular motors pulling in opposite directions on a rigid filament is studied theoretically. To this end we first consider the behavior of one set of motors pulling in a single direction against an external force using a new mean-field approach. Based on these results we analyze a similar setup with two sets of motors pulling in opposite directions in a tug of war in the presence of an external force. In both cases we find that the interplay of fluid friction and protein friction leads to a complex phase diagram where the force-velocity relations can exhibit regions of bistability and spontaneous symmetry breaking. Finally, motivated by recent work, we turn to the case of motility assay experiments where motors bound to a surface push on a bundle of filaments. We find that, depending on the absence or the presence of bistability in the force-velocity curve at zero force, the bundle exhibits anomalous or biased diffusion on long-time and large-length scales.

Use of a force-sensing automated open field apparatus in a longitudinal study of multiple behavioral deficits in CAG140 Huntington's disease model mice.

PubMed

Fowler, Stephen C; Muma, Nancy A

2015-11-01

Behavioral testing of mouse models of Huntington's disease (HD) is a key component of preclinical assessment for potential pharmacological intervention. An open field with a force plate floor was used to quantify numerous spontaneous behaviors in a slowly progressing model of HD. CAG140 (+/+, +/-, -/-) male and female mice were compared in a longitudinal study from 6 to 65 weeks of age. Distance traveled, wall rears, wall rear duration, number of low mobility bouts, in-place movements, number of high velocity runs, and gait parameters (stride rate, stride length, and velocity) were extracted from the ground reaction forces recorded in 20-min actometer sessions. Beginning at 11 weeks, HD mice (both +/- and +/+) were consistently hypoactive throughout testing. Robust hypoactivity at 39 weeks of age was not accompanied by gait disturbances. By 52 and 65 weeks of age the duration of wall rears increased and in-place tremor-like movements emerged at 65 weeks of age in the +/+, but not in the +/- HD mice. Taken together, these results suggest that hypoactivity preceding frank motor dysfunction is a characteristic of CAG140 mice that may correspond to low motivation to move seen clinically in the premanifest/prediagnostic stage in human HD. The results also show that the force plate method provides a means for tracking the progression of behavioral dysfunction in HD mice beyond the stage when locomotion is lost while enabling quantification of tremor-like and similar in-place behaviors without a change in instrumentation. Use of force plate actometry also minimizes testing-induced enrichment effects when batteries of different tests are carried out longitudinally. Copyright © 2015 Elsevier B.V. All rights reserved.

Evaluating Motivation for the Use of an Electronic Health Record Simulation Game.

PubMed

McLeod, Alexander; Hewitt, Barbara; Gibbs, David; Kristof, Caitlin

2017-01-01

Experiential learning via simulation offers a variety of benefits including reduced risks, repetitive exposure, and mastery of complex processes. How to motivate people to engage in and enjoy playing games is an important concept in the creation of serious games focused on learning new skills. This study sought to determine the motivators that increase users' pleasurable experience when playing an electronic health record simulation game. To examine how intrinsic and extrinsic motivation affected both engagement and enjoyment, we surveyed students of health professions at one university. Results indicate that while both forms of motivation are significant in increasing engagement and enjoyment, extrinsic motivation such as badges, points, and scoreboards were much more important than internal motivations for our participants. These findings have implications for the development of an electronic health record simulation game.

Evaluating Motivation for the Use of an Electronic Health Record Simulation Game

PubMed Central

McLeod, Alexander; Hewitt, Barbara; Gibbs, David; Kristof, Caitlin

2017-01-01

Experiential learning via simulation offers a variety of benefits including reduced risks, repetitive exposure, and mastery of complex processes. How to motivate people to engage in and enjoy playing games is an important concept in the creation of serious games focused on learning new skills. This study sought to determine the motivators that increase users’ pleasurable experience when playing an electronic health record simulation game. To examine how intrinsic and extrinsic motivation affected both engagement and enjoyment, we surveyed students of health professions at one university. Results indicate that while both forms of motivation are significant in increasing engagement and enjoyment, extrinsic motivation such as badges, points, and scoreboards were much more important than internal motivations for our participants. These findings have implications for the development of an electronic health record simulation game. PMID:28566987

The implications of Herzberg's "motivation-hygiene" theory for management in the Irish health sector.

PubMed

Byrne, Michael

2006-01-01

Given that they create what it sells, employees are the Irish Health service's most valuable asset. They are increasingly being asked to embrace change on many different levels. In order to facilitate this process, it behooves management to actively promote employee motivation. Herzberg et al's "motivation-hygiene" theory of motivation proposes that certain "motivator" and "hygiene" factors can respectively affect job satisfaction and dissatisfaction. Considering "motivators," better on-the-job performance may increase motivation. However, work overload can become a dissatisfier. Devolving equal levels of authority and responsibility and providing appropriate recognition may also serve to motivate. Likewise, providing opportunities for promotion and personal growth may maintain motivation, as might re-engineering of jobs so that work remains meaningful. Over time both salary and incentives may come to be viewed as entitlements and lose their ability to motivate. Other "hygiene" factors such as organizational policy and administrative structure, relations with others, job insecurity, physical working conditions, and quality of supervision can lead to job dissatisfaction. Hence, the theory of Herzberg et al usefully highlights many factors that may serve to motivate or demotivate employees. However, this theory does not reflect some of the realities of the modern health care work environment.

Effect of practical training on the learning motivation profile of Japanese pharmacy students using structural equation modeling.

PubMed

Yamamura, Shigeo; Takehira, Rieko

2017-01-01

To establish a model of Japanese pharmacy students' learning motivation profile and investigate the effects of pharmaceutical practical training programs on their learning motivation. The Science Motivation Questionnaire II was administered to pharmacy students in their 4th (before practical training), 5th (before practical training at clinical sites), and 6th (after all practical training) years of study at Josai International University in April, 2016. Factor analysis and multiple-group structural equation modeling were conducted for data analysis. A total of 165 students participated. The learning motivation profile was modeled with 4 factors (intrinsic, career, self-determination, and grade motivation), and the most effective learning motivation was grade motivation. In the multiple-group analysis, the fit of the model with the data was acceptable, and the estimated mean value of the factor of 'self-determination' in the learning motivation profile increased after the practical training programs (P= 0.048, Cohen's d = 0.43). Practical training programs in a 6-year course were effective for increasing learning motivation, based on 'self-determination' among Japanese pharmacy students. The results suggest that practical training programs are meaningful not only for providing clinical experience but also for raising learning motivation.

Student Motivation.

ERIC Educational Resources Information Center

Practitioner, 1987

1987-01-01

Although ability partly explains why some students are eager to learn in school whereas others are disinterested, motivation is another significant factor. This newsletter discusses factors that affect students' motivation to learn, considers techniques that can increase motivation, and identifies schools that have developed activities to enhance…

Adding Badging to a Marketing Simulation to Increase Motivation to Learn

ERIC Educational Resources Information Center

Saxton, M. Kim

2015-01-01

Badging has become a popular tool for obtaining social recognition for personal accomplishments. This innovation describes a way to add badging to a marketing simulation to increase student motivation to achieve the simulation's goals. Assessments indicate that badging both motivates students to perform better and helps explain students' perceived…

Gamification in science education: The relationship of educational games to motivation and achievement

NASA Astrophysics Data System (ADS)

Rouse, Kelly Elizabeth

Community colleges have become increasingly more important in America's higher education system. Part of this emphasis has been directly due to President Obama's 2010 directive to produce a competitive workforce in the United States by increasing the community college graduation rate by five million over the next decade (Madhani, 2010). Community colleges allow open admission for students which permits marginally prepared students to enter. These students may lack motivation, which contributes to student attrition (Williams, 2010). The focus of this study is to examine methods that may improve student learning and motivation, which could ultimately lead to higher graduation rates. This study investigates the relationship of gamification to motivation and achievement in a community college microbiology class. Gamification is defined as "the process of adding game mechanics to processes, programs, and platforms that would not traditionally use such concepts" (Swan, 2012). The goal of game-based learning is to increase student motivation and learning. The results of this investigation indicate that educational games increase motivation and achievement of students in a community college microbiology class.

Targeting the subthalamic nucleus in a preclinical model of alcohol use disorder.

PubMed

Pelloux, Yann; Baunez, Christelle

2017-07-01

The subthalamic nucleus (STN) has only recently been considered to have a role in reward processing. In rats, inactivation of the STN by lesion or high-frequency stimulation (HFS) decreases motivation for cocaine but increases motivation for sucrose. For ethanol, the effect of STN lesion depends on the individual's baseline intake; decreasing motivation for ethanol in rats with lower ethanol intake, while increasing motivation for ethanol in rats with higher-but still limited-ethanol intake. However, the involvement of the STN in behaviour more closely resembling some aspects of alcohol use disorder has not been assessed. This study aimed to determine the effect of STN lesions on the escalation of ethanol intake, subsequent increases in the motivation to "work" for ethanol and the choice of ethanol over a non-drug alternative. We found that STN lesion prevented increases in ethanol intake observed during intermittent ethanol access and after a long period of ethanol privation. STN lesion also decreased the motivation to work for ethanol after escalated intake. Surprisingly, STN lesion increased the choice of alcohol over saccharin. This was associated with a blunting of the hedonic responses to the taste of the reinforcement alternatives. These results evidence the involvement of the STN in different ethanol-motivated behaviours and therefore position the STN as an interesting target for the treatment of alcohol use disorders.

Short-range components of nuclear forces: Experiment versus mythology

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

Kukulin, V. I.; Platonova, M. N., E-mail: platonova@nucl-th.sinp.msu.ru

2013-12-15

The present-day situation around the description of various (central, spin-orbit, and tensor) components of short-range nuclear forces is discussed. A traditional picture of these interactions based on the idea of one-meson exchange is contrasted against numerous results of recent experiments. As is shown in the present study, these results often deviate strongly from the predictions of traditional models. One can therefore state that such models are inapplicable to describing short-range nuclear forces and that it is necessary to go over from a traditional description to some alternative QCD-based (or QCD-motivated) picture. This means that, despite the widespread popularity of traditionalmore » concepts of short-range nuclear forces and their applicability in many particular cases, these concepts are not more than scientific myths that show their inconsistency when analyzed from the viewpoint of the modern experiment.« less

Modelling vertical human walking forces using self-sustained oscillator

NASA Astrophysics Data System (ADS)

Kumar, Prakash; Kumar, Anil; Racic, Vitomir; Erlicher, Silvano

2018-01-01

This paper proposes a model of a self-sustained oscillator which can generate reliably the vertical contact force between the feet of a healthy pedestrian and the supporting flat rigid surface. The model is motivated by the self-sustained nature of the walking process, i.e. a pedestrian generates the required inner energy to sustain its repetitive body motion. The derived model is a fusion of the well-known Rayleigh, Van der Pol and Duffing oscillators. Some additional nonlinear terms are added to produce both the odd and even harmonics observed in the experimentally measured force data. The model parameters were derived from force records due to twelve pedestrians walking on an instrumented treadmill at ten speeds using a linear least square technique. The stability analysis was performed using the energy balance method and perturbation method. The results obtained from the model show a good agreement with the experimental results.

Force sensing using 3D displacement measurements in linear elastic bodies

NASA Astrophysics Data System (ADS)

Feng, Xinzeng; Hui, Chung-Yuen

2016-07-01

In cell traction microscopy, the mechanical forces exerted by a cell on its environment is usually determined from experimentally measured displacement by solving an inverse problem in elasticity. In this paper, an innovative numerical method is proposed which finds the "optimal" traction to the inverse problem. When sufficient regularization is applied, we demonstrate that the proposed method significantly improves the widely used approach using Green's functions. Motivated by real cell experiments, the equilibrium condition of a slowly migrating cell is imposed as a set of equality constraints on the unknown traction. Our validation benchmarks demonstrate that the numeric solution to the constrained inverse problem well recovers the actual traction when the optimal regularization parameter is used. The proposed method can thus be applied to study general force sensing problems, which utilize displacement measurements to sense inaccessible forces in linear elastic bodies with a priori constraints.

Changes in coping and social motives for drinking and alcohol consumption across the menstrual cycle.

PubMed

Joyce, Kayla M; Hudson, Amanda; O'Connor, Roisin; Thompson, Kara; Hodgin, Megan; Perrot, Tara; Stewart, Sherry H

2018-04-01

Alcohol use has been reported to fluctuate over women's menstrual cycles (MCs), with increased intake occurring premenstrually/menstrually (phases characterized by heightened negative affect) and during the ovulatory phase (a phase characterized by positive affect). This suggests women may drink for particular emotion-focused reasons at specific points in their cycles. However, no research had yet examined MC variability in drinking motives, or links between cycle-related changes in drinking motives and alcohol consumption. Ninety-four normally cycling women (M age  = 22.9 years old, SD age  = 4.7) completed daily diary measures (via Smartphone surveys), with questions pertaining to state drinking motives and quantity of alcohol consumed for the course of a full MC. Drinking motives differed by cycle phase. Women reported a slight increase in drinking to self-medicate for negative affect premenstrually, with drinking to cope peaking in the menstrual phase and declining mid-cycle. Women reported a slight increasing trend across the cycle in social motives for drinking, while enhancement motives remained relatively stable across the cycle. Cycle-related changes in drinking motives predicted increases in the quantity of alcohol consumed. Drinking to cope with negative affect predicted a greater number of drinks menstrually (days 1-5). While social motives predicted a greater number of drinks during the follicular and ovulatory phases (days 5-16), enhancement motives were unrelated to drinking quantity across cycle phase. Clinicians should be attentive to cycle phase when treating reproductive-aged women with alcohol disorders (e.g., encouraging the use of healthier means of coping with negative affect during menses). © 2017 Wiley Periodicals, Inc.

Increasing motivation changes subjective reports of listening effort and choice of coping strategy.

PubMed

Picou, Erin M; Ricketts, Todd A

2014-06-01

The purpose of this project was to examine the effect of changing motivation on subjective ratings of listening effort and on the likelihood that a listener chooses either a controlling or an avoidance coping strategy. Two experiments were conducted, one with auditory-only (AO) and one with auditory-visual (AV) stimuli, both using the same speech recognition in noise materials. Four signal-to-noise ratios (SNRs) were used, two in each experiment. The two SNRs targeted 80% and 50% correct performance. Motivation was manipulated by either having participants listen carefully to the speech (low motivation), or listen carefully to the speech and then answer quiz questions about the speech (high motivation). Sixteen participants with normal hearing participated in each experiment. Eight randomly selected participants participated in both. Using AO and AV stimuli, motivation generally increased subjective ratings of listening effort and tiredness. In addition, using auditory-visual stimuli, motivation generally increased listeners' willingness to do something to improve the situation, and decreased their willingness to avoid the situation. These results suggest a listener's mental state may influence listening effort and choice of coping strategy.

Alcohol preference influences the subthalamic nucleus control on motivation for alcohol in rats.

PubMed

Lardeux, Sylvie; Baunez, Christelle

2008-02-01

In addition to its role in motor and attentional processes, the subthalamic nucleus (STN) has also been recently demonstrated to be involved in motivational function. Indeed, bilateral STN lesions modulate differentially the motivation for natural rewards and drugs of abuse, increasing motivation for food and decreasing motivation for cocaine in rats. Here, we show that in outbred rats, the STN can modulate the motivation for alcohol according to alcohol preference, without affecting alcohol intake. When performed on 'High-Drinker' rats, STN lesions enhanced the breaking point (BP) under a progressive ratio schedule of reinforcement and increased the time spent in the environment previously paired with alcohol access in the place preference paradigm. In contrast, when performed on 'Low-Drinker' rats, STN lesions decreased the BP and increased the time spent in the environment paired with water. These results show that STN lesions enhance the motivation for alcohol in rats showing a high alcohol preference, whereas they decrease it in rats showing a low preference for alcohol. These results suggest that the STN plays a complex role in the reward circuit, that is not limited to a

Children's moral motivation, sympathy, and prosocial behavior.

PubMed

Malti, Tina; Gummerum, Michaela; Keller, Monika; Buchmann, Marlis

2009-01-01

Two studies investigated the role of children's moral motivation and sympathy in prosocial behavior. Study 1 measured other-reported prosocial behavior and self- and other-reported sympathy. Moral motivation was assessed by emotion attributions and moral reasoning following hypothetical transgressions in a representative longitudinal sample of Swiss 6-year-old children (N = 1,273). Prosocial behavior increased with increasing sympathy, especially if children displayed low moral motivation. Moral motivation and sympathy were also independently related to prosocial behavior. Study 2 extended the findings of Study 1 with a second longitudinal sample of Swiss 6-year-old children (N = 175) using supplementary measures of prosocial behavior, sympathy, and moral motivation. The results are discussed in regard to the precursors of the moral self in childhood.

"Why do you want your child to have braces?" Investigating the motivations of Hispanic/Latino and white parents.

PubMed

Davis, Blake B; Bayirli, Burcu; Ramsay, Douglas S; Turpin, David L; Paige, Andrew; Riedy, Christine A

2015-11-01

Many psychological, social, and cultural factors influence parents' motivation to seek orthodontic care for their children. In this study, we used Q methodology to identify and categorize shared motives and determine whether cultural differences exist between Hispanic/Latino (H/L) and non-Hispanic/Latino, white (W) parents. The fundamental question posed to the parents was "Why do you want your child to have braces?" Q methodology involves 3 stages. (1) Interviews of H/L (n = 5) and W (n = 5) parents generated 35 statements that represented different motives to seek orthodontic care. (2) In the Q sort, 70 new parents (22 H/L, 48 W) ranked statements in order of relative importance using a forced distribution grid. (3) Factor analysis was performed separately for the H/L and W groups to uncover cultural differences. Four motivational profiles were described for both the H/L and W parents based on the significant factors identified in each group. More H/L parents (18 of 22 parents) than W parents (22 of 48 parents) were characterized by 1 of their group's 4 profiles. Comparisons of the motivational profiles across the groups showed 4 global themes: well-timed treatment that prevents future dental problems, parental responsibility, perceived benefits, and perceived need instilled by the dentist. Four global themes captured the motives of most parents seeking orthodontic treatment for their children. Understanding these global themes can help clinicians frame their treatment discussions with parents. Copyright © 2015 American Association of Orthodontists. Published by Elsevier Inc. All rights reserved.

Mechanics of the animate.

PubMed Central

Killeen, P R

1992-01-01

Behavior is treated as basic physics. Dimensions are identified and their transformations from physical specification to axes in behavioral space are suggested. Responses are treated as action patterns arrayed along a continuum of activation energy. Behavior is seen as movement along a trajectory through this behavior space. Incentives or reinforcers are attractors in behavior space, at the centers of basins of lowered potential. Trajectories impinging on such basins may be captured; repeated capture will warp the trajectory toward a geodesic, a process called conditioning. Conditioning is enhanced by contiguity, the proximity between the measured behavior and the incentive at the end of the trajectory, and by contingency, the depth of the trajectory below the average level of the potential energy landscape. Motivation is seen as the potential of an organism for motion under the forces impinging on it. Degree of motivation is characterized by the depth of the potential field, with low motivation corresponding to a flat field and a flat gradient of activation energy. Drives are the forces of incentives propagated through behavior space. Different laws for the attenuation of drive with behavioral distance are discussed, as is the dynamics of action. The basic postulate of behavior mechanics is incentive-tracking in behavior space, the energy for which is provided by decreases in potential. The relation of temporal gradients to response differentiation and temporal discrimination is analyzed. Various two-body problems are sketched to illustrate the application of these ideas to association, choice, scalar timing, self-control, and freedom. PMID:1602272

Theory and Practice of Sustainable Development: Path to Managing Rural Grass-roots Party Organization from the Perspective of Impetus

NASA Astrophysics Data System (ADS)

Zhong, Xianzhe

2018-02-01

Impetus is the most fundamental guarantee for the survival and progress of organization. The rural grass-roots party organization should serve as a battle fortress of party helping realize the purpose of party in the village. Therefore, to strengthen the management of rural party branches, it is imperative to optimize their impetus, stepping on the basic paths: developing and utilizing material force, and digging and stimulating spiritual force for rural grass-roots party organization construction; adhering to the dialectical view on impetus to highlight both material and spiritual motivations.

K-12 Aerospace Education Programs

NASA Technical Reports Server (NTRS)

1999-01-01

NASA, the United States Air Force Academy, the Air Force Space Command, the University of Colorado at Colorado Springs (UCCS), and the United States Space Foundation teamed to produce a dynamic and successful graduate course and in-service program for K-12 educators that has a positive impact on education trends across the nation. Since 1986, more than 10,000 educators from across the United States have participated in Space Discovery and Teaching with Space affecting nearly a million students in grades K-12. The programs are designed to prepare educators to use the excitement of space to motivate students in all curriculum subjects.

Using TARGET to Enhance Preservice Classroom Teachers' Ability to Identify and Develop a Motivational Climate in Physical Education

ERIC Educational Resources Information Center

Perlman, Dana J.; Karp, Grace Goc

2007-01-01

Motivation is often a major concern for educators in all subject areas. Educational benefits associated with increased levels of student motivation have been well-documented within educational research. Improving student motivation can be affected by the educational environment (motivational climate), developed by the teacher. This study examined…

Teacher-student interpersonal relationships do change and affect academic motivation: a multilevel growth curve modelling.

PubMed

Maulana, Ridwan; Opdenakker, Marie-Christine; Bosker, Roel

2014-09-01

Research has shown that the teacher-student interpersonal relationship (TSIR) is important for student motivation. Although TSIR has received a growing interest, there are only few studies that focus on changes and links between TSIR and student academic motivation in a longitudinal fashion in non-Western contexts. This study investigated changes in TSIR and links with academic motivation as perceived by first-grade secondary school students in Indonesia. TSIR was studied from the perspective of interpersonal behaviour in terms of Influence and Proximity. Students' academic motivation was studied from the perspective of self-determination theory. A total of 504 first-grade secondary school students of 16 mathematics and English classes participated in the study. Surveys were administered in five waves throughout the school year. Multilevel growth curve modelling was applied. Contrary to the (limited) general research findings from Western contexts, we found that the quality of TSIR (student perceptions) increased over time. The increase was slightly more pronounced for Proximity than for Influence. In accordance with the findings for the Western countries, the level of students' controlled motivation increased, while that of autonomous motivation decreased over time. However, the negative change in autonomous motivation was less pronounced. As in Western countries, TSIR was longitudinally linked with academic motivation, in particular, with autonomous motivation. Evidence is found that TSIR can change in a favourable way, and this positively affects student motivation. Future research could benefit from unravelling the influences of cultures on changes in TSIR in broader contexts. © 2013 The British Psychological Society.

Medical students' situational motivation to participate in simulation based team training is predicted by attitudes to patient safety.

PubMed

Escher, Cecilia; Creutzfeldt, Johan; Meurling, Lisbet; Hedman, Leif; Kjellin, Ann; Felländer-Tsai, Li

2017-02-10

Patient safety education, as well as the safety climate at clinical rotations, has an impact on students' attitudes. We explored medical students' self-reported motivation to participate in simulation-based teamwork training (SBTT), with the hypothesis that high scores in patient safety attitudes would promote motivation to SBTT and that intrinsic motivation would increase after training. In a prospective cohort study we explored Swedish medical students' attitudes to patient safety, their motivation to participate in SBTT and how motivation was affected by the training. The setting was an integrated SBTT course during the surgical semester that focused on non-technical skills and safe treatment of surgical emergencies. Data was collected using the Situational Motivation Scale (SIMS) and the Attitudes to Patient Safety Questionnaire (APSQ). We found a positive correlation between students' individual patient safety attitudes and self-reported motivation (identified regulation) to participate in SBTT. We also found that intrinsic motivation increased after training. Female students in our study scored higher than males regarding some of the APSQ sub-scores and the entire group scored higher or on par with comparable international samples. In order to enable safe practice and professionalism in healthcare, students' engagement in patient safety education is important. Our finding that students' patient safety attitudes show a positive correlation to motivation and that intrinsic motivation increases after training underpins patient safety climate and integrated teaching of patient safety issues at medical schools in order to help students develop the knowledge, skills and attitudes required for safe practice.

Influence of virtual reality soccer game on walking performance in robotic assisted gait training for children

PubMed Central

2010-01-01

Background Virtual reality (VR) offers powerful therapy options within a functional, purposeful and motivating context. Several studies have shown that patients' motivation plays a crucial role in determining therapy outcome. However, few studies have demonstrated the potential of VR in pediatric rehabilitation. Therefore, we developed a VR-based soccer scenario, which provided interactive elements to engage patients during robotic assisted treadmill training (RAGT). The aim of this study was to compare the immediate effect of different supportive conditions (VR versus non-VR conditions) on motor output in patients and healthy control children during training with the driven gait orthosis Lokomat®. Methods A total of 18 children (ten patients with different neurological gait disorders, eight healthy controls) took part in this study. They were instructed to walk on the Lokomat in four different, randomly-presented conditions: (1) walk normally without supporting assistance, (2) with therapists' instructions to promote active participation, (3) with VR as a motivating tool to walk actively and (4) with the VR tool combined with therapists' instructions. The Lokomat gait orthosis is equipped with sensors at hip and knee joint to measure man-machine interaction forces. Additionally, subjects' acceptance of the RAGT with VR was assessed using a questionnaire. Results The mixed ANOVA revealed significant main effects for the factor CONDITIONS (p < 0.001) and a significant interaction CONDITIONS × GROUP (p = 0.01). Tests of between-subjects effects showed no significant main effect for the GROUP (p = 0.592). Active participation in patients and control children increased significantly when supported and motivated either by therapists' instructions or by a VR scenario compared with the baseline measurement "normal walking" (p < 0.001). Conclusions The VR scenario used here induces an immediate effect on motor output to a similar degree as the effect resulting from verbal instructions by the therapists. Further research needs to focus on the implementation of interactive design elements, which keep motivation high across and beyond RAGT sessions, especially in pediatric rehabilitation. PMID:20412572

A Quantitative Evaluation of Gender, Nationality, and Generational/Age Influence on Academic Motivation

ERIC Educational Resources Information Center

Rush, Karen

2013-01-01

Universities are challenged with finding ways to motivate the increasing number of diverse students so that the largest number of students can be expected to succeed. University success is measured by retention and graduation rates, which affect profit. A lack of academic motivation among increasingly diverse students influences student retention,…

Increase Student Motivation with More Choices

ERIC Educational Resources Information Center

Dennis, Sophie Lampard

2017-01-01

When students are offered choices within assignments it increases buy-in and, therefore, motivation toward the task--and ultimately for the class itself. As a professor in an academic setting in which many millennials seem to be suffering from a persistent lack of motivation, it was a no-brainer for the author to consider creating a way to offer…

Enhancing Student Motivation as Evidenced by Improved Academic Growth and Increased Work Completion.

ERIC Educational Resources Information Center

Belcher, Gay; Macari, Nancy

This project evaluated a program for enhancing student motivation as evidenced by improved academic growth and increased work completion. The targeted population consisted of fifth graders in a small school in a medium-sized rural community in the Midwest. The problem of lack of achievement motivation and lack of student concern about academic…

Increasing Motivation To Write by Enhancing Self-Perception, Utilizing Collaboration, Modeling and Relevance.

ERIC Educational Resources Information Center

Cook, Pamela J.; Green, Roxanne M.; Meyer, Tammy S.; Saey, Laura A.

This report describes a program for increasing motivation in writing that will enhance students' skills at a variety of grade levels. The targeted population consisted of first, second, and third grade classes as well as ninth through twelfth grade Learning Disabled students in a Midwestern state. The evidence of lack of motivation was documented…

The Motivated Project Team

DTIC Science & Technology

2009-12-01

Herzberg, “Extrinsic satisfaction only leads to movements, not mo- tivation.” Motivated team mem- bers, on the other hand, possess an internal...other hand, consider how individuals make decisions and how rewards influence future performance . What follow are some key motivators stemming from com...can increase job satisfaction : • Challenging assignments • Increased responsibility • The possibility of achievement, advancement, personal

A Brief Instructional Intervention to Increase Students' Motivation on the First Day of Class

ERIC Educational Resources Information Center

McGinley, Jared J.; Jones, Brett D.

2014-01-01

What an instructor does on the first day of a course can impact students' motivation in the course. To build upon these prior research findings, we implemented a first-day intervention to influence students' motivation by increasing their perceptions of course interest, course usefulness, and instructor caring. The participants were undergraduate…

Motivation, Management, and Performance.

ERIC Educational Resources Information Center

Olmstead, Joseph A.

There is an increasing interest today in the ways in which human motivation contributes to the productivity and performance of personnel. This early study of motivation management emphasizes that the organizational environment is a principal determinant of the quality of employee motivation. Concrete considerations in the management of motivation…

Elements of the Competitive Situation That Affect Intrinsic Motivation.

ERIC Educational Resources Information Center

Reeve, Johnmarshall; Deci, Edward L.

1996-01-01

Explores the effects of three elements of the competitive situation (competitive set, competitive outcome, and interpersonal context) on intrinsic motivation in a sample of college students (n=100). Competitive outcome and interpersonal context affected intrinsic motivation: winning increased intrinsic motivation, while pressured interpersonal…

Enhancing excitability of dopamine neurons promotes motivational behaviour through increased action initiation.

PubMed

Boekhoudt, Linde; Wijbrans, Ellen C; Man, Jodie H K; Luijendijk, Mieneke C M; de Jong, Johannes W; van der Plasse, Geoffrey; Vanderschuren, Louk J M J; Adan, Roger A H

2018-01-01

Motivational deficits are a key symptom in multiple psychiatric disorders, including major depressive disorder, schizophrenia and addiction. A likely neural substrate for these motivational deficits is the brain dopamine (DA) system. In particular, DA signalling in the nucleus accumbens, which originates from DA neurons in the ventral tegmental area (VTA), has been identified as a crucial substrate for effort-related and activational aspects of motivation. Unravelling how VTA DA neuronal activity relates to motivational behaviours is required to understand how motivational deficits in psychiatry can be specifically targeted. In this study, we therefore used designer receptors exclusively activated by designer drugs (DREADD) in TH:Cre rats, in order to determine the effects of chemogenetic DA neuron activation on different aspects of motivational behaviour. We found that chemogenetic activation of DA neurons in the VTA, but not substantia nigra, significantly increased responding for sucrose under a progressive ratio schedule of reinforcement. More specifically, high effort exertion was characterized by increased initiations of reward-seeking actions. This effect was dependent on effort requirements and instrumental contingencies, but was not affected by sucrose pre-feeding. Together, these findings indicate that VTA DA neuronal activation drives motivational behaviour by facilitating action initiation. With this study, we show that enhancing excitability of VTA DA neurons is a viable strategy to improve motivational behaviour. Copyright © 2017 Elsevier B.V. and ECNP. All rights reserved.

Me Time, or We Time? Age Differences in Motivation for Exercise.

PubMed

Steltenpohl, Crystal N; Shuster, Michael; Peist, Eric; Pham, Amber; Mikels, Joseph A

2018-04-23

Increasing exercise continues to be an important health issue for both older and younger adults. Researchers have suggested several methods for increasing exercise motivation. Socioemotional selectivity theory (SST) posits that people's motivation shift from future-oriented instrumental goals to present-oriented emotionally meaningful goals as we age, which provides insight into how people's motivations for exercise may differ for older versus younger adults. The aim of our study was to examine how exercise motivation differs for older versus younger adults. Older (greater than 59 years old) and younger (aged 18-26 years) adults participated in focus groups. They discussed exercise motivation (or lack thereof), motivators and barriers to exercise, and preferences about when, where, and with whom they exercise. Focus group transcripts were analyzed using direct content analysis and iterative categorization. Consistent with SST, younger adults generally preferred to exercise alone to achieve instrumental fitness goals, whereas older adults preferred to exercise with others. Additionally, older adults tend to consider peripheral others (e.g., strangers, acquaintances), as a positive rather than a negative influence. SST provides a framework for exploring age-related shifts in exercise motivation. Additionally, the positivity effect was reflected in how older adults evaluated the influence of peripheral others. Motivational messages could be tailored to increase health behavior changes by focusing on instrumental exercise goals for younger adults and exercise focused on meaningful relationships for older adults.

For love or money? What motivates people to know the minds of others?

PubMed

Harkness, Kate L; Jacobson, Jill A; Sinclair, Brooke; Chan, Emilie; Sabbagh, Mark A

2012-01-01

Mood affects social cognition and "theory of mind", such that people in a persistent negative mood (i.e., dysphoria) have enhanced abilities at making subtle judgements about others' mental states. Theorists have argued that this hypersensitivity to subtle social cues may have adaptive significance in terms of solving interpersonal problems and/or minimising social risk. We tested whether increasing the social salience of a theory of mind task would preferentially increase dyspshoric individuals' performance on the task. Forty-four dysphoric and 51 non-dysphoric undergraduate women participated in a theory of mind decoding task following one of three motivational manipulations: (i) social motivation (ii) monetary motivation, or (iii) no motivation. Social motivation was associated with the greatest accuracy of mental state decoding for the dysphoric group, whereas the non-dysphoric group showed the highest accuracy in the monetary motivation condition. These results suggest that dysphoric individuals may be especially, and preferentially, motivated to understand the mental states of others.

"I help because I want to, not because you tell me to": empathy increases autonomously motivated helping.

PubMed

Pavey, Louisa; Greitemeyer, Tobias; Sparks, Paul

2012-05-01

Empathetic arousal has been found to be a strong predictor of helping behavior. However, research has neglected the motivational mechanisms whereby empathetic concern elicits help giving. Three studies examined the extent to which autonomous and controlled motives for helping mediated the relationship between empathy and helping. Study 1 found that state empathy predicted willingness to offer time and money to help a person in need, with this relationship mediated by autonomous motivation for helping. Study 2 demonstrated that dispositional, empathetic concern predicted prosocial intentions and behavior via the mediation of autonomous motivation. Study 3 revealed that participants who focused on the emotions of another person in distress reported greater willingness to help than did participants who remained emotionally detached, with this effect mediated by autonomous motivation to help. Controlled motivation had no positive effects on helping in any of the studies. The results suggest that empathy encourages prosocial behavior by increasing autonomous motivation to help.

Changes in Parent Motivation Predicts Changes in Body Mass Index z-Score (zBMI) and Dietary Intake Among Preschoolers Enrolled in a Family-Based Obesity Intervention

PubMed Central

Kuhl, Elizabeth S.; Filigno, Stephanie S.; Clifford, Lisa M.; Connor, Jared M.; Stark, Lori J.

2014-01-01

Objectives To examine whether changes in parent motivation over the course of a pediatric obesity intervention are significantly associated with long-term changes in treatment outcomes. Methods Study hypotheses were tested with a secondary data analysis of a randomized controlled trial (N = 42). Study analyses tested whether baseline to posttreatment change in total score for a self-report parent motivation measure (Parent Motivation Inventory [PMI]) was significantly associated with baseline to 6-month follow-up changes in body mass index z-score (zBMI), dietary variables, and physical activity. Results Increases in PMI were significantly associated with decreased zBMI, decreased consumption of sugar-sweetened beverages and sweets, and increased consumption of artificially sweetened beverages. Conclusions Given that increases in parent motivation were associated with some treatment benefits, future research should evaluate the impact of directly assessing and targeting parent motivation on weight outcomes for preschoolers participating in a weight management program. PMID:25016604

Effects of Classroom Practices on Reading Comprehension, Engagement, and Motivations for Adolescents

PubMed Central

Guthrie, John T.; Klauda, Susan Lutz

2014-01-01

We investigated the roles of classroom supports for multiple motivations and engagement in students’ informational text comprehension, motivation, and engagement. A composite of classroom contextual variables consisting of instructional support for choice, importance, collaboration, and competence, accompanied by cognitive scaffolding for informational text comprehension, was provided in four-week instructional units for 615 grade 7 students. These classroom motivational-engagement supports were implemented within integrated literacy/history instruction in the Concept-Oriented Reading Instruction (CORI) framework. CORI increased informational text comprehension compared with traditional instruction (TI) in a switching replications experimental design. Students’ perceptions of the motivational-engagement supports were associated with increases in students’ intrinsic motivation, value, perceived competence, and increased positive engagement (dedication) more markedly in CORI than in TI, according to multiple regression analyses. Results extended the evidence for the effectiveness of CORI to literacy/history subject matter and informational text comprehension among middle school students. The experimental effects in classroom contexts confirmed effects from task-specific, situated experimental studies in the literature. PMID:25506087

Social power and approach-related neural activity

PubMed Central

Smolders, Ruud; Cremer, David De

2012-01-01

It has been argued that power activates a general tendency to approach whereas powerlessness activates a tendency to inhibit. The assumption is that elevated power involves reward-rich environments, freedom and, as a consequence, triggers an approach-related motivational orientation and attention to rewards. In contrast, reduced power is associated with increased threat, punishment and social constraint and thereby activates inhibition-related motivation. Moreover, approach motivation has been found to be associated with increased relative left-sided frontal brain activity, while withdrawal motivation has been associated with increased right sided activations. We measured EEG activity while subjects engaged in a task priming either high or low social power. Results show that high social power is indeed associated with greater left-frontal brain activity compared to low social power, providing the first neural evidence for the theory that high power is associated with approach-related motivation. We propose a framework accounting for differences in both approach motivation and goal-directed behaviour associated with different levels of power. PMID:19304842

Effects of Classroom Practices on Reading Comprehension, Engagement, and Motivations for Adolescents.

PubMed

Guthrie, John T; Klauda, Susan Lutz

2014-10-01

We investigated the roles of classroom supports for multiple motivations and engagement in students' informational text comprehension, motivation, and engagement. A composite of classroom contextual variables consisting of instructional support for choice, importance, collaboration, and competence, accompanied by cognitive scaffolding for informational text comprehension, was provided in four-week instructional units for 615 grade 7 students. These classroom motivational-engagement supports were implemented within integrated literacy/history instruction in the Concept-Oriented Reading Instruction (CORI) framework. CORI increased informational text comprehension compared with traditional instruction (TI) in a switching replications experimental design. Students' perceptions of the motivational-engagement supports were associated with increases in students' intrinsic motivation, value, perceived competence, and increased positive engagement (dedication) more markedly in CORI than in TI, according to multiple regression analyses. Results extended the evidence for the effectiveness of CORI to literacy/history subject matter and informational text comprehension among middle school students. The experimental effects in classroom contexts confirmed effects from task-specific, situated experimental studies in the literature.

Social power and approach-related neural activity.

PubMed

Boksem, Maarten A S; Smolders, Ruud; De Cremer, David

2012-06-01

It has been argued that power activates a general tendency to approach whereas powerlessness activates a tendency to inhibit. The assumption is that elevated power involves reward-rich environments, freedom and, as a consequence, triggers an approach-related motivational orientation and attention to rewards. In contrast, reduced power is associated with increased threat, punishment and social constraint and thereby activates inhibition-related motivation. Moreover, approach motivation has been found to be associated with increased relative left-sided frontal brain activity, while withdrawal motivation has been associated with increased right sided activations. We measured EEG activity while subjects engaged in a task priming either high or low social power. Results show that high social power is indeed associated with greater left-frontal brain activity compared to low social power, providing the first neural evidence for the theory that high power is associated with approach-related motivation. We propose a framework accounting for differences in both approach motivation and goal-directed behaviour associated with different levels of power.

Activation of D2 dopamine receptor-expressing neurons in the nucleus accumbens increases motivation

PubMed Central

Soares-Cunha, Carina; Coimbra, Barbara; David-Pereira, Ana; Borges, Sonia; Pinto, Luisa; Costa, Patricio; Sousa, Nuno; Rodrigues, Ana J.

2016-01-01

Striatal dopamine receptor D1-expressing neurons have been classically associated with positive reinforcement and reward, whereas D2 neurons are associated with negative reinforcement and aversion. Here we demonstrate that the pattern of activation of D1 and D2 neurons in the nucleus accumbens (NAc) predicts motivational drive, and that optogenetic activation of either neuronal population enhances motivation in mice. Using a different approach in rats, we further show that activating NAc D2 neurons increases cue-induced motivational drive in control animals and in a model that presents anhedonia and motivational deficits; conversely, optogenetic inhibition of D2 neurons decreases motivation. Our results suggest that the classic view of D1–D2 functional antagonism does not hold true for all dimensions of reward-related behaviours, and that D2 neurons may play a more prominent pro-motivation role than originally anticipated. PMID:27337658

Research on psychological encouragement in business management

NASA Astrophysics Data System (ADS)

Cui, Kebing

2018-03-01

With the rapid development of society, the competition in the market is aggravating day by day. The loyalty of employees to the enterprises is decreasing. With the constant improvement of the employees' abilities, the willingness of job-hopping and the needs of employees become more diversified. Employees as an important driving force for the development of enterprises is the basic and necessary factor to support the operation of enterprises. In the face of increasingly fierce market competition, enterprises must use reasonable ways to motivate their employees and maintain the sense of belonging and trust with their employees. Continuous development to enhance staff treatment, so that employees dedicated to enterprise development services [1]. This article briefly discusses the exploration and research on the practical thinking of psychological incentive in business management.

New methods for new questions: obstacles and opportunities.

PubMed

Foster, E Michael; Kalil, Ariel

2008-03-01

Two forces motivate this special section, "New Methods for New Questions in Developmental Psychology." First are recent developments in social science methodology and the increasing availability of those methods in common software packages. Second, at the same time psychologists' understanding of developmental phenomena has continued to grow. At their best, these developments in theory and methods work in tandem, fueling each other. Newer methods make it possible for scientists to better test their ideas; better ideas lead methodologists to techniques that better reflect, capture, and quantify the underlying processes. The articles in this special section represent a sampling of these new methods and new questions. The authors describe common themes in these articles and identify barriers to future progress, such as the lack of data sharing by and analytical training for developmentalists.

The AstroHDF Effort

NASA Astrophysics Data System (ADS)

Masters, J.; Alexov, A.; Folk, M.; Hanisch, R.; Heber, G.; Wise, M.

2012-09-01

Here we update the astronomy community on our effort to deal with the demands of ever-increasing astronomical data size and complexity, using the Hierarchical Data Format, version 5 (HDF5) format (Wise et al. 2011). NRAO, LOFAR and VAO have joined forces with The HDF Group to write an NSF grant, requesting funding to assist in the effort. This paper briefly summarizes our motivation for the proposed project, an outline of the project itself, and some of the material discussed at the ADASS Birds of a Feather (BoF) discussion. Topics of discussion included: community experiences with HDF5 and other file formats; toolsets which exist and/or can be adapted for HDF5; a call for development towards visualizing large (> 1 TB) image cubes; and, general lessons learned from working with large and complex data.

Donkey-assisted rehabilitation program for children: a pilot study.

PubMed

De Rose, Paola; Cannas, Elisabetta; Reinger Cantiello, Patrizia

2011-01-01

Bonding with animals grants access to the sphere of affectivity and facilitates therapeutic engagement. The methodological approach of donkey-assisted programs is based on mediation, which is characterized by multidirectional relationships (patient-donkey-therapist). The donkey is an excellent facilitator in the motivation-building process, being able to stimulate the child's development by way of active and positive forces that foster psycho-affective and psycho-cognitive development processes. Results of this study, which focused on the child's approach to the donkey, indicate that while communicating with the animal, children rely more on physical expressions than on verbal language. Donkey-assisted rehabilitative sessions can help in identifying children's strong points, on which motivation could be built.

"I'll have one of each": how separating rewards into (meaningless) categories increases motivation.

PubMed

Wiltermuth, Scott S; Gino, Francesca

2013-01-01

We propose that separating rewards into categories can increase motivation, even when those categories are meaningless. Across six experiments, people were more motivated to obtain one reward from one category and another reward from another category than they were to obtain two rewards from a pool that included all items from either reward category. As a result, they worked longer when potential rewards for their work were separated into meaningless categories. This categorization effect persisted regardless of whether the rewards were presented using a gain or loss frame. Using both moderation and mediation analyses, we found that categorizing rewards had these positive effects on motivation by increasing the degree to which people felt they would "miss out" if they did not obtain the second reward. We discuss implications for research on motivation and incentives.

Uptake and metabolic effects of salicylic acid on the pulvinar motor cells of Mimosa pudica L.

PubMed

Dédaldéchamp, Fabienne; Saeedi, Saed; Fleurat-Lessard, Pierrette; Roblin, Gabriel

2014-01-01

In this paper, the salicylic acid (o-hydroxy benzoic acid) (SA) uptake by the pulvinar tissues of Mimosa pudica L. pulvini was shown to be strongly pH-dependent, increasing with acidity of the assay medium. This uptake was performed according to a unique affinity system (K(m) = 5.9 mM, V(m) = 526 pmol mgDW(-1)) in the concentration range of 0.1-5 mM. The uptake rate increased with increasing temperature (5-35 °C) and was inhibited following treatment with sodium azide (NaN3) and carbonyl cyanide m-chlorophenylhydrazone (CCCP), suggesting the involvement of an active component. Treatment with p-chloromercuribenzenesulfonic acid (PCMBS) did not modify the uptake, indicating that external thiol groups were not necessary. KCl, which induced membrane depolarization had no significant effect, and fusicoccin (FC), which hyperpolarized cell membrane, stimulated the uptake, suggesting that the pH component of the proton motive force was likely a driving force. These data suggest that the SA uptake by the pulvinar tissues may be driven by two components: an ion-trap mechanism playing a pivotal role and a putative carrier-mediated mechanism. Unlike other benzoic acid derivatives acting as classical respiration inhibitors (NaN3 and KCN), SA modified the pulvinar cell metabolism by increasing the respiration rate similar to CCCP and 2,4-dinitrophenol (DNP). Furthermore, SA inhibited the osmoregulated seismonastic reaction in a pH dependent manner and induced characteristic damage to the ultrastructural features of the pulvinar motor cells, particularly at the mitochondrial level. Copyright © 2013 Elsevier Masson SAS. All rights reserved.

The Art of Instituting and Maintaining Learners' Motivation

ERIC Educational Resources Information Center

Tran, Thu H.

2013-01-01

Whereas teachers' responsibilities with accountability, class sizes and workload increase, their benefits, income and job security seem to decrease. Motivating and keeping classroom teachers motivated to successfully and happily perform their instructional duties can be challenging. One feasible approach to motivating teachers is offering…

The role of word choice and criterion on intentional memory.

PubMed

Toyota, Hiroshi

2015-02-01

The relationship between the criterion for choosing and the self-choice effects (greater recall in a self-choice compared to a forced-choice condition) on intentional memory was examined. Thirty-three female nursing school volunteers were administered 24 word pairs in a 2 × 2 design to assess the influence of motivation upon free recall. When word pairs were presented to participants, they were asked to choose a word to-be-remembered, either in a self-choice condition or a forced-choice condition. Words chosen by the participants were recalled more often than those chosen by the experimenter (forced choice). Thus, the self-choice effect was greater for words chosen with a self-reference criterion compared to a metamemory criterion, supporting the integration hypothesis as the origin of the self-choice effect.

Do incentives undermine intrinsic motivation? Increases in intrinsic motivation within an incentive-based intervention for people living with HIV in Tanzania

PubMed Central

Dow, William H.; Njau, Prosper F.

2018-01-01

Background Cash and in-kind incentives can improve health outcomes in various settings; however, there is concern that incentives may ‘crowd out’ intrinsic motivation to engage in beneficial behaviors. We examined this hypothesis in a randomized trial of food and cash incentives for people living with HIV infection in Tanzania. Methods We analyzed data from 469 individuals randomized to one of three study arms: standard of care, short-term cash transfers, or short-term food assistance. Eligible participants were: 1) ≥18 years old; 2) HIV-infected; 3) food insecure; and 4) initiated antiretroviral therapy (ART) ≤90 days before the study. Food or cash transfers, valued at ~$11 per month and conditional on attending clinic visits, were provided for ≤6 months. Intrinsic motivation was measured at baseline, 6, and 12 months using the autonomous motivation section of the Treatment Self-Regulation Questionnaire (TSRQ). We compared the change in TSRQ score from baseline to 6 and 12 months and the change within study arms. Results The mean intrinsic motivation score was 2.79 at baseline (range: 1–3), 2.91 at 6 months (range: 1–3), and 2.95 at 12 months (range: 2–3), which was 6 months after the incentives had ended. Among all patients, the intrinsic motivation score increased by 0.13 points at 6 months (95% CI (0.09, 0.17), Cohen’s d = 0.29) and 0.19 points at 12 months (95% CI (0.14, 0.24), Cohen’s d = 0.49). Intrinsic motivation also increased within each study group at 6 months: 0.15 points in the food arm (95% CI (0.09, 0.21), Cohen’s d = 0.37), 0.11 points in the cash arm (95% CI (0.05, 0.18), Cohen’s d = 0.25), and 0.08 points in the comparison arm (95% CI (-0.03, 0.19), Cohen’s d = 0.21); findings were similar at 12 months. Increases in motivation were statistically similar between arms at 6 and 12 months. Conclusion Intrinsic motivation for ART adherence increased significantly both overall and within the food and cash incentive arms, even after the incentive period was over. Increases in motivation did not differ by study group. These results suggest that incentive interventions for treatment adherence should not be withheld due to concerns of crowding out intrinsic motivation. PMID:29902177

Effect of practical training on the learning motivation profile of Japanese pharmacy students using structural equation modeling

PubMed Central

2017-01-01

Purpose To establish a model of Japanese pharmacy students’ learning motivation profile and investigate the effects of pharmaceutical practical training programs on their learning motivation. Methods The Science Motivation Questionnaire II was administered to pharmacy students in their 4th (before practical training), 5th (before practical training at clinical sites), and 6th (after all practical training) years of study at Josai International University in April, 2016. Factor analysis and multiple-group structural equation modeling were conducted for data analysis. Results A total of 165 students participated. The learning motivation profile was modeled with 4 factors (intrinsic, career, self-determination, and grade motivation), and the most effective learning motivation was grade motivation. In the multiple-group analysis, the fit of the model with the data was acceptable, and the estimated mean value of the factor of ‘self-determination’ in the learning motivation profile increased after the practical training programs (P= 0.048, Cohen’s d= 0.43). Conclusion Practical training programs in a 6-year course were effective for increasing learning motivation, based on ‘self-determination’ among Japanese pharmacy students. The results suggest that practical training programs are meaningful not only for providing clinical experience but also for raising learning motivation. PMID:28167812

Recurrent flow analysis in spatiotemporally chaotic 2-dimensional Kolmogorov flow

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

Lucas, Dan, E-mail: dan.lucas@ucd.ie; Kerswell, Rich R., E-mail: r.r.kerswell@bris.ac.uk

2015-04-15

Motivated by recent success in the dynamical systems approach to transitional flow, we study the efficiency and effectiveness of extracting simple invariant sets (recurrent flows) directly from chaotic/turbulent flows and the potential of these sets for providing predictions of certain statistics of the flow. Two-dimensional Kolmogorov flow (the 2D Navier-Stokes equations with a sinusoidal body force) is studied both over a square [0, 2π]{sup 2} torus and a rectangular torus extended in the forcing direction. In the former case, an order of magnitude more recurrent flows are found than previously [G. J. Chandler and R. R. Kerswell, “Invariant recurrent solutionsmore » embedded in a turbulent two-dimensional Kolmogorov flow,” J. Fluid Mech. 722, 554–595 (2013)] and shown to give improved predictions for the dissipation and energy pdfs of the chaos via periodic orbit theory. Analysis of the recurrent flows shows that the energy is largely trapped in the smallest wavenumbers through a combination of the inverse cascade process and a feature of the advective nonlinearity in 2D. Over the extended torus at low forcing amplitudes, some extracted states mimic the statistics of the spatially localised chaos present surprisingly well recalling the findings of Kawahara and Kida [“Periodic motion embedded in plane Couette turbulence: Regeneration cycle and burst,” J. Fluid Mech. 449, 291 (2001)] in low-Reynolds-number plane Couette flow. At higher forcing amplitudes, however, success is limited highlighting the increased dimensionality of the chaos and the need for larger data sets. Algorithmic developments to improve the extraction procedure are discussed.« less

Nucleus Accumbens Microcircuit Underlying D2-MSN-Driven Increase in Motivation.

PubMed

Soares-Cunha, Carina; Coimbra, Bárbara; Domingues, Ana Verónica; Vasconcelos, Nivaldo; Sousa, Nuno; Rodrigues, Ana João

2018-01-01

The nucleus accumbens (NAc) plays a central role in reinforcement and motivation. Around 95% of the NAc neurons are medium spiny neurons (MSNs), divided into those expressing dopamine receptor D1 (D1R) or dopamine receptor D2 (D2R). Optogenetic activation of D2-MSNs increased motivation, whereas inhibition of these neurons produced the opposite effect. Yet, it is still unclear how activation of D2-MSNs affects other local neurons/interneurons or input terminals and how this contributes for motivation enhancement. To answer this question, in this work we combined optogenetic modulation of D2-MSNs with in loco pharmacological delivery of specific neurotransmitter antagonists in rats. First, we showed that optogenetic activation of D2-MSNs increases motivation in a progressive ratio (PR) task. We demonstrated that this behavioral effect relies on cholinergic-dependent modulation of dopaminergic signalling of ventral tegmental area (VTA) terminals, which requires D1R and D2R signalling in the NAc. D2-MSN optogenetic activation decreased ventral pallidum (VP) activity, reducing the inhibitory tone to VTA, leading to increased dopaminergic activity. Importantly, optogenetic activation of D2-MSN terminals in the VP was sufficient to recapitulate the motivation enhancement. In summary, our data suggests that optogenetic stimulation of NAc D2-MSNs indirectly modulates VTA dopaminergic activity, contributing for increased motivation. Moreover, both types of dopamine receptors signalling in the NAc are required in order to produce the positive behavioral effects.

Nucleus Accumbens Microcircuit Underlying D2-MSN-Driven Increase in Motivation

PubMed Central

Soares-Cunha, Carina; Coimbra, Bárbara; Domingues, Ana Verónica; Vasconcelos, Nivaldo; Sousa, Nuno

2018-01-01

Abstract The nucleus accumbens (NAc) plays a central role in reinforcement and motivation. Around 95% of the NAc neurons are medium spiny neurons (MSNs), divided into those expressing dopamine receptor D1 (D1R) or dopamine receptor D2 (D2R). Optogenetic activation of D2-MSNs increased motivation, whereas inhibition of these neurons produced the opposite effect. Yet, it is still unclear how activation of D2-MSNs affects other local neurons/interneurons or input terminals and how this contributes for motivation enhancement. To answer this question, in this work we combined optogenetic modulation of D2-MSNs with in loco pharmacological delivery of specific neurotransmitter antagonists in rats. First, we showed that optogenetic activation of D2-MSNs increases motivation in a progressive ratio (PR) task. We demonstrated that this behavioral effect relies on cholinergic-dependent modulation of dopaminergic signalling of ventral tegmental area (VTA) terminals, which requires D1R and D2R signalling in the NAc. D2-MSN optogenetic activation decreased ventral pallidum (VP) activity, reducing the inhibitory tone to VTA, leading to increased dopaminergic activity. Importantly, optogenetic activation of D2-MSN terminals in the VP was sufficient to recapitulate the motivation enhancement. In summary, our data suggests that optogenetic stimulation of NAc D2-MSNs indirectly modulates VTA dopaminergic activity, contributing for increased motivation. Moreover, both types of dopamine receptors signalling in the NAc are required in order to produce the positive behavioral effects. PMID:29780881

Laser bottom hole assembly

DOEpatents

Underwood, Lance D; Norton, Ryan J; McKay, Ryan P; Mesnard, David R; Fraze, Jason D; Zediker, Mark S; Faircloth, Brian O

2014-01-14

There is provided for laser bottom hole assembly for providing a high power laser beam having greater than 5 kW of power for a laser mechanical drilling process to advance a borehole. This assembly utilizes a reverse Moineau motor type power section and provides a self-regulating system that addresses fluid flows relating to motive force, cooling and removal of cuttings.

Dark Sectors 2016 Workshop: Community Report

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

Alexander, Jim; et al.

This report, based on the Dark Sectors workshop at SLAC in April 2016, summarizes the scientific importance of searches for dark sector dark matter and forces at masses beneath the weak-scale, the status of this broad international field, the important milestones motivating future exploration, and promising experimental opportunities to reach these milestones over the next 5-10 years.

Reading Incentives that Work: No-Cost Strategies to Motivate Kids to Read and Love It!

ERIC Educational Resources Information Center

Small, Ruth V.

2009-01-01

In education, it is possible to find dozens of examples of "forced" reading incentive programs that categorize student reading levels, provide limited reading lists coordinated with those reading levels, assess student reading through computer-based tests, and award tangible prizes when they pass the test. Those who perform best get the most…

Economic, Demographic, and Sociological Factors Influencing the Geographic Mobility of Young Workers.

ERIC Educational Resources Information Center

Smith, Lewis H.

Geographic mobility of the labor force is an adjustment mechanism essential to the maintenance of a growing economy which is undergoing technological change and a rising educational level. This study analyzes the factors which influence mobility decisions to determine whether these choices are made on the basis of rational economic motives. To…

Birth Control as Obscenity: Margaret Sanger and "The Woman Rebel."

ERIC Educational Resources Information Center

Masel-Walters, Lynne

In spite of the negative aspects of her determination to be the sole motivator, controller, and martyr for the birth control movement, Margaret Sanger was a positive social force in testing and denouncing the Comstock law. The law, named for Anthony Comstock, a postal inspector who had lobbied Congress to forbid the distribution of obscene…

The Management of Self-Interest: Phenomenology and Staff Motivation. Coombe Lodge Working Paper: Information Bank Number 1634. Revised.

ERIC Educational Resources Information Center

Theodossin, Ernest

Theorists have named environmental forces, organizational structure, group interaction, individual needs, or some combination of these factors in accounting for organizational behavior. Phenomenology argues that organizations do not exist apart from the people of whom they are composed; in this view their private perceptions and personal…

Hot under the Collar: Weighing the Dangers of a Weight-Loss Drug

ERIC Educational Resources Information Center

DeSimone, Susan M.; Genereux, Annie Prud'homme

2011-01-01

This column provides original articles on innovations in case study teaching, assessment of the method, as well as case studies with teaching notes. In this month's issue the goal of the case study is for students to expand their understanding of membrane permeability and the proton motive force in mitochondria through the study of…

Misfit Structures & Lost Opportunities: The Urgent Case for Restructuring Teacher Compensation and Career Paths

ERIC Educational Resources Information Center

Shields, Regis Anne

2013-01-01

Teaching effectiveness is the most important in-school factor for improving student achievement. In order to attract, retain, develop, and motivate the most effective teaching force possible, many argue that teacher salaries should be elevated to compete with other professions that attract and retain strong talent. This paper explores how to…

The Acceptance of Microblogging in the Learning Process: The µBAM Model

ERIC Educational Resources Information Center

Rejón-Guardia, Francisco; Sánchez-Fernández, Juan; Muñoz-Leiva, Francisco

2013-01-01

Microblogging social networks (µBSNs) provide the opportunity to communicate worldwide while using a small number of characters; this is an apparent limitation that forces users to share only essential information when linking to the world with which they interact. These platforms can serve to motivate students by narrowing the physical and…

Aiming Higher. 25 Stories of How Companies Prosper by Combining Sound Management and Social Vision.

ERIC Educational Resources Information Center

Bollier, David

This collection of real-life stories profiles chief executive officers, managers, and employees who view social challenges as opportunities to create new markets, build motivated work forces, and attract loyal customers. The companies profiled have been honored by The Business Enterprise Trust, founded by Norman Lear. The following profiles are…

"It's a Big Mystery, Isn't It?" Mitigating Placement Challenges with a Model of Student Teacher Placement Decision-Making

ERIC Educational Resources Information Center

Parot-Juraska, Maribeth

2009-01-01

This phenomenological study explores how external forces, internal motivations and environmental conditions may influence school personnel when considering placement requests. Seidman's three-stage interview process was implemented to conduct semi-structured interviews with five principals and five teachers in a large, urban school district. Four…

Handbook for Dynamic Data Acquisition and Analysis - IES Recommended Practices 012.1

NASA Technical Reports Server (NTRS)

Himelblau, H.; Wise, J. W.; Piersol, A. G.; Grundvig, M. R.

1994-01-01

The original motivation for this Handbook came from personnel of The Aerospace Corporation (TAC), who are technical advisors to the Air Force Space and Missile Systems Center. Over the preceding two decades, TAC has observed a seemingly endless series of errors and anomalies in the acquisition and analysis of structural dynamic and aeroacoustic data.