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Sample records for subject performing organization

  1. It matters how old you feel: Antecedents and performance consequences of average relative subjective age in organizations.

    Science.gov (United States)

    Kunze, Florian; Raes, Anneloes M L; Bruch, Heike

    2015-09-01

    This article extends the conceptual knowledge of average relative subjective age in organizations by exploring organizational-level antecedents and consequences of employees, on average, feeling younger than their chronological age. We draw from the theories of selection-optimization-compensation and socioemotional selectivity to build a theoretical framework for relative subjective age in organizations. We hypothesize that companies in which employees, on average, perceive themselves to be younger than they actually are have a higher average individual goal accomplishment and, in turn, experience higher company performance. We further hypothesize that employees' average experience of high work-related meaning relates to a lower subjective age in organizations. In addition, we assess the role of environmental dynamism and age-inclusive human resource management as moderators in this theoretical model. Through empirically testing this model in a multisource dataset, including 107 companies with 15,164 participating employees, we received support for the hypothesized relationships. Our results contribute to current debates in the scientific literature on age and have important practical implications in light of the demographic changes faced by many companies. This research indicates to both researchers and practitioners that it is not employees' chronological age but their subjective age, a factor that can be influenced, which drives organizational performance outcomes. (c) 2015 APA, all rights reserved).

  2. Performance in Public Organizations

    DEFF Research Database (Denmark)

    Andersen, Lotte Bøgh; Boesen, Andreas; Pedersen, Lene Holm

    2016-01-01

    Performance in public organizations is a key concept that requires clarification. Based on a conceptual review of research published in 10 public administration journals, this article proposes six distinctions to describe the systematic differences in performance criteria: From which stakeholder...... of management and performance are classified. The results illustrate how a systematization of the conceptual space of performance in public organizations can help researchers select what to study and what to leave out with greater accuracy while also bringing greater clarity to public debates about performance....

  3. Subjective performance evaluations and employee careers

    DEFF Research Database (Denmark)

    Frederiksen, Anders; Lange, Fabian; Kriechell, Ben

    Firms commonly use supervisor evaluations to assess the performance of employees who work in complex environments. Doubts persist whether their subjective nature invalidates using these performance measures to learn about careers of individuals and to inform theory in personnel economics. We...... examine personnel data from six large companies and establish how subjective ratings, interpreted as ordinal rankings of employee performances within narrowly defined peer-groups, correlate with objective career outcomes. We find many similarities across firms in how subjective ratings correlate with base...

  4. Subjective performance evaluation and gender discrimination

    NARCIS (Netherlands)

    Maas, V.S.; Torres-Gonzalez, R.

    2011-01-01

    Gender discrimination continues to be a problem in organizations. It is therefore important that organizations use performance evaluation methods that ensure equal opportunities for men and women. This article reports the results of an experiment to investigate whether and, if so, how the gender of

  5. Performance pinned down: studying subjectivity and the language of performance

    NARCIS (Netherlands)

    Hoedemaekers, C.; Keegan, A.

    2010-01-01

    We draw on Lacan’s notion of language to study employee subjectivity in a public sector organization (Publica) in the Netherlands. Our main contribution lies in using Lacan’s theorization of language and subjectivity as a basis for a detailed textual analysis of how local organizational discourses

  6. Subjective performance evaluations and employee careers

    DEFF Research Database (Denmark)

    Frederiksen, Anders; Lange, Fabian; Kriechel, Ben

    Firms commonly use supervisor ratings to evaluate employees when objective performance measures are unavailable. Supervisor ratings are subjective and data containing supervisor ratings typically stem from individual firm level data sets. For both these reasons, doubts persist on how useful...... such data are for evaluating theories in personnel economics and whether findings from such data generalize to the labor force at large. In this paper, we examine personnel data from six large companies and establish how subjective ratings, interpreted as ordinal rankings of employees within narrowly...

  7. Subject to Form: Research Interviews, Performative Subjectivity, Professional Development

    Science.gov (United States)

    Sarigianides, Sophia Tatiana

    2010-01-01

    In this dissertation, I analyze teacher, literacy coach and researcher subjectivities in a five-year study of on-site professional development with middle-grade Language Arts teachers in a school designated by its district and state as severely underperforming. Interested in the role of research interviews as both research method and cultural…

  8. Determining organ doses from computed tomography scanners using cadaveric subjects

    Science.gov (United States)

    Griglock, Thomas M.

    The use of computed tomographic (CT) imaging has increased greatly since its inception in 1972. Technological advances have increased both the applicability of CT exams for common health problems as well as the radiation doses used to perform these exams. The increased radiation exposures have garnered much attention in the media and government agencies, and have brought about numerous attempts to quantify the amount of radiation received by patients. While the overwhelming majority of these attempts have focused on creating models of the human body (physical or computational), this research project sought to directly measure the radiation inside an actual human being. Three female cadaveric subjects of varying sizes were used to represent live patients. Optically-stimulated luminescent (OSL) dosimeters were used to measure the radiation doses. A dosimeter placement system was developed, tested, and optimized to allow accurate and reproducible placement of the dosimeters within the cadaveric subjects. A broad-beam, 320-slice, volumetric CT scanner was utilized to perform all CT exams, including five torso exams, four cardiac exams, and three organ perfusion exams. Organ doses ranged in magnitude from less than 1 to over 120 mGy, with the largest doses measured for perfusion imaging. A methodology has been developed that allows fast and accurate measurement of actual organ doses resulting from CT exams. The measurements made with this methodology represent the first time CT organ doses have been directly measured within a human body. These measurements are of great importance because they allow comparison to the doses measured using previous methods, and can be used to more accurately assess the risks from CT imaging.

  9. The Validity of Subjective Performance Measures

    DEFF Research Database (Denmark)

    Meier, Kenneth J.; Winter, Søren C.; O'Toole, Laurence J.

    2015-01-01

    Public management studies are increasingly using survey data on managers’ perceptions of performance to measure organizational performance. The perceptual measures are tempting to apply because archival performance data or surveys of target group outcomes and satisfaction are often lacking, costly...... to provide, and are highly policy specific rendering generalization difficult. But are perceptual performance measures valid, and do they generate unbiased findings? We examine these questions in a comparative study of middle managers in schools in Texas and Denmark. The findings are remarkably similar...... the resources it has. Even worse, the use of perceptual performance measures seems to provide biased estimates when examining how management affects performance....

  10. All-day performance variations in normal and narcoleptic subjects.

    Science.gov (United States)

    Godbout, R; Montplaisir, J

    1986-01-01

    This study compared the performance of narcoleptic and control subjects on one psychomotor task, examined the recuperative power of naps in narcoleptic subjects, and evaluated the respective recuperative values of REM and NREM sleep. Ten untreated narcoleptic and eight control subjects repeatedly responded to a choice reaction time task during days with and days without napping. Narcoleptic subjects exhibited low performance levels relative to control subjects on all variables. Napping improved the performance of narcoleptic subjects except for the number of long latency (reaction time greater than 1,000 ms) responses. Finally, performance, particularly on accuracy measures, was better, although not significantly, after NREM naps when compared with REM naps.

  11. Occupational performance of women subjected to mastectomy

    Directory of Open Access Journals (Sweden)

    Jamylle Silva de Brito

    2014-12-01

    Full Text Available Among the several therapeutic approaches to combat breast cancer, mastectomy is the most feared by women, not only because of its aggressive invasive characteristics to the female body, but also because of its biological, functional, emotional, and social repercussions. The objective of the present study was to outline the occupational performance profile through the description of daily life, productive and leisure activities of women that have undergone mastectomy. This is a descriptive cross-sectional study with 21 women carried out at a school hospital in Recife, Pernambuco state, Brazil, from June to September, 2011. We used a sociodemographic questionnaire and occupational assessment by the Canadian Model of Occupational Performance (CMOP. In the occupational performance evaluation, Productivity was the most compromised area, followed by Leisure. Taking care of the body after mastectomy was not a restraint to the development of the daily-life, productive and leisure activities for the operated women, although some reorganization was needed to maintain a satisfactory performance.

  12. Occupational performance of women subjected to mastectomy

    OpenAIRE

    Jamylle Silva de Brito; Juliana Fonsêca de Queiroz Marcelino

    2014-01-01

    Among the several therapeutic approaches to combat breast cancer, mastectomy is the most feared by women, not only because of its aggressive invasive characteristics to the female body, but also because of its biological, functional, emotional, and social repercussions. The objective of the present study was to outline the occupational performance profile through the description of daily life, productive and leisure activities of women that have undergone mastectomy. This is a descriptive ...

  13. Subjectivity

    Directory of Open Access Journals (Sweden)

    Jesús Vega Encabo

    2015-11-01

    Full Text Available In this paper, I claim that subjectivity is a way of being that is constituted through a set of practices in which the self is subject to the dangers of fictionalizing and plotting her life and self-image. I examine some ways of becoming subject through narratives and through theatrical performance before others. Through these practices, a real and active subjectivity is revealed, capable of self-knowledge and self-transformation. 

  14. Subjective performance evaluations and reciprocity in principal-agent relations

    DEFF Research Database (Denmark)

    Sebald, Alexander Christopher; Walzl, Markus

    2014-01-01

    . In contrast to existing models of reciprocity, we find that agents tend to sanction whenever the feedback of principals is below their subjective self-evaluations even if agents' pay-offs are independent of it. In turn, principals provide more positive feedback (relative to their actual performance assessment......We conduct a laboratory experiment with agents working on, and principals benefiting from, a real effort task in which the agents' performance can only be evaluated subjectively. Principals give subjective performance feedback to agents, and agents have an opportunity to sanction principals...

  15. Relations between subjective evaluations of memory and objective memory performance

    NARCIS (Netherlands)

    Schmidt, I.W; Berg, I.J; Deelman, B.G

    2001-01-01

    Several explanations for the weak relations between subjective memory judgments and objective memory performance were investigated in two groups of normal older adults. Group 1 sampled a general population (mean age 61.6 yr., range 46-891, while Group 2 sampled subjects who were on a waiting Est for

  16. Measuring organizational performance in the hospital industry: an exploratory comparison of objective and subjective methods.

    Science.gov (United States)

    McCracken, M J; McIlwain, T F; Fottler, M D

    2001-11-01

    One of the major challenges facing health services management researchers is the measurement of various aspects of organizational performance. This challenge is exacerbated by a reluctance of many healthcare organizations to share data with researchers because of a fear of competitor access to these data. Even where objective, reliable and valid measures of organizational performance are available, typically they are available only in aggregate form, rather than for individual organizations. In response to these constraints, researchers have used subjective measures of performance often based on the perception of key executives. This research compares the subjective perceptions of hospital executives to the objective financial performance data of 60 hospitals. While the correlations between the subjective and objective measures vary, return of assets (ROA) and operating margin are the most valid subjective financial measures of hospital performance. Implications for future research are discussed.

  17. Performance of Pekin ducks subjected to qualitative feed restriction ...

    African Journals Online (AJOL)

    Performance of Pekin ducks subjected to qualitative feed restriction at various ages during the rearing period. Different diets low in lysine were fed to ducklings of various ages in three separate trials to investigate the effect of these diets on bodymass and subsequent reproductive performance. The results showed that when ...

  18. Optimal contracts based on subjective performance evaluations and reciprocity

    DEFF Research Database (Denmark)

    Sebald, Alexander Christopher; Walzl, Markus

    2015-01-01

    As demonstrated in a recent laboratory experiment (see Sebald & Walzl, 2014), individuals tend to sanction others who subjectively evaluate their performance whenever this assessment falls short of the individuals’ self-evaluation. Interestingly, this is the case even if the individuals’ earnings...... are unaffected by the subjective performance appraisal. Hence, performance feedback which falls short of agents’ self- evaluations can be interpreted as an unkind act that triggers a negatively reciprocal response not only if the assessment determines agents’ earnings but also when it lacks monetary consequences...

  19. Performance, Pinned Down: A Lacanian Analysis of Subjectivity at Work

    NARCIS (Netherlands)

    C.M.W. Hoedemaekers (Casper)

    2008-01-01

    textabstractThis study seeks to create an account of how the performing subject comes into being within a specific organizational context. It looks at some of the ways in which managerial practices impact upon the selfhood of employees by means of the language in which they are couched. Drawing

  20. Toward High-Performance Organizations.

    Science.gov (United States)

    Lawler, Edward E., III

    2002-01-01

    Reviews management changes that companies have made over time in adopting or adapting four approaches to organizational performance: employee involvement, total quality management, re-engineering, and knowledge management. Considers future possibilities and defines a new view of what constitutes effective organizational design in management.…

  1. ORGANIZATION PERFORMANCE AND EMPLOYEE SATISFACTION

    OpenAIRE

    Milica Jakšiæ, Miloš Jakšiæ

    2014-01-01

    Employee satisfaction related to their job, possibilities of career development, mechanisms of performance measurement and reward, as remuneration systems are of growing importance. Expectations of highly educated workforce continuously increase, so recruiting and retention of such workers becomes key factor of success for modern companies. Success of companies is expected to change together with employee saticfaction.

  2. Performance management practices in public sector organizations : Impact on performance

    NARCIS (Netherlands)

    Verbeeten, Frank H.M.

    2008-01-01

    Purpose - The aim of this study is to investigate whether performance management practices affect performance in public sector organizations. Design/methodology/approach - Theoretically, the research project is based on economic as well as behavioral theories. The study distinguishes amongst

  3. Factor structure of trunk performance data for healthy subjects.

    Science.gov (United States)

    Lee, Y; Kuo, C

    2000-05-01

    To examine the factor structure of various measurements of trunk muscle performance for healthy subjects. A total of 22 performance scores were collected and their univariate and multi-variate relationships were examined. Extensive literature exists on the measurement of trunk performance data and the relationships between measurements but what needs to be collected to realize a true performance score remains unclear. Trunk muscle performance scores of 150 subjects (71 males and 79 females) were obtained on an Isostation B-200 Dynamometer. Twenty-two parameters measuring range of motion, isometric strength, velocity, and endurance on all three planes of motion were collected. The factor structures were constructed using Principal Components Analysis. Clear-cut factor patterns (explained 96.3% of the total variance) suggests that the five-factor structure might be valid and appropriate for this population. The major loading on each factor indicated that: Factor 1 could be labeled as a static strength measure; Factor 2 as velocity; Factor 3 as flexibility; and Factors 4 and 5 as fatigue-resistance. No single mode of measurement can provide a good representation of a total trunk muscle performance. RelevanceFor the realization of trunk muscle performance, clinics have to measure all modes of isometric strength, velocity, range of motion, and endurance. Care must be taken in eliminating any parameter.

  4. Association of Chronic Subjective Tinnitus with Neuro- Cognitive Performance.

    Science.gov (United States)

    Gudwani, Sunita; Munjal, Sanjay K; Panda, Naresh K; Kohli, Adarsh

    2017-12-01

    Chronic subjective tinnitus is associated with cognitive disruptions affecting perception, thinking, language, reasoning, problem solving, memory, visual tasks (reading) and attention. To evaluate existence of any association between tinnitus parameters and neuropsychological performance to explain cognitive processing. Study design was prospective, consisting 25 patients with idiopathic chronic subjective tinnitus and gave informed consent before planning their treatment. Neuropsychological profile included (i) performance on verbal information, comprehension, arithmetic and digit span; (ii) non-verbal performance for visual pattern completion analogies; (iii) memory performance for long-term, recent, delayed-recall, immediate-recall, verbal-retention, visualretention, visual recognition; (iv) reception, interpretation and execution for visual motor gestalt. Correlation between tinnitus onset duration/ loudness perception with neuropsychological profile was assessed by calculating Spearman's coefficient. Findings suggest that tinnitus may interfere with cognitive processing especially performance on digit span, verbal comprehension, mental balance, attention & concentration, immediate recall, visual recognition and visual-motor gestalt subtests. Negative correlation between neurocognitive tasks with tinnitus loudness and onset duration indicated their association. Positive correlation between tinnitus and visual-motor gestalt performance indicated the brain dysfunction. Tinnitus association with non-auditory processing of verbal, visual and visuo-spatial information suggested neuroplastic changes that need to be targeted in cognitive rehabilitation.

  5. Nota Técnica: Comportamiento productivo de la morera sometida a dos alternativas de fertilización orgánica Technical Note: Productive performance of mulberry subject to two alternatives of organic fertilization

    Directory of Open Access Journals (Sweden)

    Gertrudis Pentón

    2007-11-01

    Full Text Available Con el objetivo de evaluar el comportamiento agronómico de la morera (Morus alba L. var. Acorazonada ante dos alternativas de fertilización orgánica, se realizó un estudio en áreas de la EEPF «Indio Hatuey». El suelo característico del lugar es del tipo Ferralítico Rojo hidratado; las precipitaciones oscilaron entre 1 000 y 1 145 mm de lluvia por año. En el corte de establecimiento se obtuvieron variaciones altamente significativas entre los tratamientos: testigo sin fertilizar, asociación morera-Albizia lebbeck como abono verde vs morera fertilizada con materia orgánica (41,6; 45,0 y 72,4 g de biomasa seca comestible por individuo, respectivamente. Sin embargo, en la época lluviosa del segundo año de explotación, la producción acumulada no mostró variaciones significativas entre la asociación y la morera fertilizada (88,8 y 86,7 g de biomasa seca comestible por individuo, aunque sí con respecto al testigo que solo produjo 40,7 g. Se concluye que el aporte de materia orgánica al suelo durante el establecimiento de las plantaciones de morera y/o la asociación de A. lebbeck manejada como abono verde, proporcionan una ventaja significativa en la respuesta productiva del arbusto forrajero, y se destacó la segunda alternativa por su carácter endógeno.A study was carried out in areas of the EEPF “Indio Hatuey”, with the objective of evaluating the agronomic performance of mulberry (Morus alba L. var. Acorazonada before two alternatives of organic fertilization. The soil of the site is hydrated Ferralitic Red; rainfall oscillated between 1 000 and 1 145 mm per year. In the establishment cutting highly significant variations were obtained among the treatments: control without fertilization, association mulberry-Albizia lebbeck as green manure vs mulberry fertilized with organic matter (41,6; 45,0 and 72,4 g of edible dry biomass per individual, respectively. Nevertheless, in the rainy season of the second year of exploitation

  6. Which one Enhances Muscular Performance in ACL Reconstructed Subjects

    Science.gov (United States)

    Harput, Gulcan; Ulusoy, Burak; Atay, Ahmet Ozgur; Baltacı, Gul

    2014-01-01

    Objectives: The aim of this study was to investigate the effects of functional knee brace and kinesiotaping on muscular performance in anterior cruciate ligament reconstructed subjects who reached return to sport phase of the rehabilitation. Methods: Twenty (17 males, 3 females, Age: 24.7±7.1 years, Body weight: 74.4±12.0 kg, Height: 177.9±6.5 cm, BMI: 23.9±3.6 kg/m2) subjects who underwent anterior cruciate ligament reconstruction by using hamstring tendon auto graft were included in this study. When the subjects reached the return to sports phase of rehabilitation which was 6th months after surgery, knee muscle strength, jump performance and balance tests were performed 3 times: bare, with knee brace and with kinesio taping. The order of the tests were randomized to eliminate the effects of fatigue and motor learning. Quadriceps and hamstring muscle strength was measured on an isokinetic dynamometer at 180 °/s and 60°/s angular velocities. Vertical Jump (VJ) and One Leg Hop Tests (OLHT) were used to assess jump performance. Star Excursion Balance Test (SEBT) with anterior, posteromedial and posterolateral reach distance was used to assess the dynamic balance. When all tests were performed, the subjects were asked under which test condition they felt more confident. Repeated measures of ANOVA was used to analyze the difference among three test conditions (bare, kinesiotaping, knee brace). Bonferroni post hoc test was used for pairwise comparison. Results: SEBT posteromedial (PM)and posterolateral (PL) reach distances were found significantly different among three test conditions(PM: F(2,38)=3.42,p=0.04), PL: F(2,38)=4.37,p=0.02). Kinesiotaping increased posteromedial reach distance (p=0.03). On the other hand, brace decreased posterolateral reach distance (p=0.04). VJ and OLHT performance were also found significantly different between three test conditions (VJ: F (2,38)=3.44,p=0.04, OLHT: (F(2,38)=4.04,p=0.02). Kinesio taping increased one leg hop distance

  7. Staff Performance Evaluation in Public Organizations

    Directory of Open Access Journals (Sweden)

    Drumea C.

    2014-12-01

    Full Text Available In public Organizations staff performance is difficult to measure in absence of overall quantitative performance indicators. There are also the qualitative indicators that give an overview on staff’s motivation, strive, ability, commitment to values, teamwork. These aspects are even less easy to illustrate, in private and public sectors equally. In both cases, measuring staff performance at work, as well as its input on the global performance of the organization is a difficult task which has in practice different approaches. Subsequently, this paper is discussing the system indicators and performance triggers used in International Organizations UN affiliated, in order to adjust staff classification and benefits to their staff’s performance.

  8. Public management: organizations, governance, and performance

    National Research Council Canada - National Science Library

    O'Toole, Laurence J; Meier, Kenneth J

    2011-01-01

    ...? Can their separable contributions to performance be estimated? The fate of public policies in today's world lies in the hands of public organizations, which in turn are often intertwined with others in latticed patterns of governance...

  9. Ethographic ubiquity: original fake, expanded codex, transurban subject, performative doll

    Directory of Open Access Journals (Sweden)

    Massimo Canevacci

    2012-12-01

    Full Text Available My essay presents the emerging of fake as a concept that does not mean false, but a post-dualistic mix of false/truth. The relation between digital culture and ubiquitous subjectivity is fundamental during its process; in the same way, the relation between aura and reproducibility cannot be determined dialectically as Benjamin did. Digital auratic reproducibility is the contemporary context and communicational metropolis is characterized by spontaneous and public performance: so, my conclusion is an analysis of some “living” doll and their uncanny presence.

  10. An opportunity cost model of subjective effort and task performance.

    Science.gov (United States)

    Kurzban, Robert; Duckworth, Angela; Kable, Joseph W; Myers, Justus

    2013-12-01

    Why does performing certain tasks cause the aversive experience of mental effort and concomitant deterioration in task performance? One explanation posits a physical resource that is depleted over time. We propose an alternative explanation that centers on mental representations of the costs and benefits associated with task performance. Specifically, certain computational mechanisms, especially those associated with executive function, can be deployed for only a limited number of simultaneous tasks at any given moment. Consequently, the deployment of these computational mechanisms carries an opportunity cost--that is, the next-best use to which these systems might be put. We argue that the phenomenology of effort can be understood as the felt output of these cost/benefit computations. In turn, the subjective experience of effort motivates reduced deployment of these computational mechanisms in the service of the present task. These opportunity cost representations, then, together with other cost/benefit calculations, determine effort expended and, everything else equal, result in performance reductions. In making our case for this position, we review alternative explanations for both the phenomenology of effort associated with these tasks and for performance reductions over time. Likewise, we review the broad range of relevant empirical results from across sub-disciplines, especially psychology and neuroscience. We hope that our proposal will help to build links among the diverse fields that have been addressing similar questions from different perspectives, and we emphasize ways in which alternative models might be empirically distinguished.

  11. Measuring Student Performance in General Organic Chemistry

    Science.gov (United States)

    Austin, Ara C.; Ben-Daat, Hagit; Zhu, Mary; Atkinson, Robert; Barrows, Nathan; Gould, Ian R.

    2015-01-01

    Student performance in general organic chemistry courses is determined by a wide range of factors including cognitive ability, motivation and cultural capital. Previous work on cognitive factors has tended to focus on specific areas rather than exploring performance across all problem types and cognitive skills. In this study, we have categorized…

  12. Growth performance of pigs subjected to multiple concurrent environmental stressors.

    Science.gov (United States)

    Hyun, Y; Ellis, M; Riskowski, G; Johnson, R W

    1998-03-01

    The effects of many single stressors have been reported, but how pigs perform when subjected to more than one or two stressors at a time, as is common in commercial swine production, has not. To study this, 256 Yorkshire x Hampshire or purebred Duroc pigs (34.7+/-.5 kg) were subjected to one of the eight treatment combinations (2 x 2 x 2 factorial) of ambient temperature (constant thermoneutral [24 degrees C] or high cycling temperature [28 to 34 degrees C]), stocking density (.56 or .25 m2/pig), and social group (static group or regrouped at the start of wk 1 and 3) during a 4-wk experiment. The temperature regimens were imposed in two adjacent mechanically ventilated rooms, and each temperature was imposed in each room across two trials. Four barrows and four gilts were assigned to each of the eight pens in the two rooms, and they always had free access to water and a corn-soybean meal-based diet. Treatments were imposed after a 7-d acclimation period at 24 degrees C and .56 m2/pig. Weight gain and feed intake were measured weekly. The main effects of each of the stressors for 4-wk ADG and ADFI were significant (P stressor interactions for ADG, ADFI, and gain:feed (G:F), there were no significant three-way interactions and only six two-way interactions, suggesting that the effects of the individual stressors were additive. Accordingly, the growth rate of pigs subjected to the single stressor of high cycling temperature, restricted space allowance, or regrouping was depressed 10, 16, and 11%, respectively, and ADG of pigs subjected to all three stressors simultaneously was depressed by 31%. Stressor additivity was further corroborated by examining the effect of stressor order, or the number of stressors imposed simultaneously. As the number of stressors increased from 0 to 3, ADG, ADFI, and G:F decreased linearly. These data suggest that multiple concurrent stressors affect growth performance of pigs in a predictable fashion (i.e., additively) and indicate that

  13. [Dyschromatopsia in subjects occupationally exposed to organic solvents].

    Science.gov (United States)

    Blain, L; Mergler, D

    1986-01-01

    Chromatic discrimination loss was evaluated with the Lanthony D-15 desaturated Panel among 89 workers professionally exposed to organic solvents and 114 non-exposed workers. Quantitative and qualitative analysis of the results reveal the following: among the non-exposed workers, the prevalence of tritanomalies and the mean colour confusion index increase with age; among the exposed workers, the prevalence of dyschromatopsia and the mean colour confusion index increase with age and with exposure level; for 4% of the moderately exposed workers and 26% of the highly exposed workers, protanomaly, deuteranomaly or scotopic loss were observed with the tritanomaly. Chromatic discrimination impairment may be an important indicator of neuro-ophthalmologic changes associated with professional exposure to organic solvents.

  14. Working memory performance and thalamus microstructure in healthy subjects.

    Science.gov (United States)

    Piras, F; Caltagirone, C; Spalletta, G

    2010-12-01

    Research on the neural basis of working memory (WM) has generally focused on cortical regions, specifically frontal and parietal areas. Comparatively, evidence of a possible involvement of deep gray matter structures, that are parts of cortico-cortical circuits linking anterior and posterior cortical areas, is far less clear. The goal of the present study is to test the hypothesis that individual structural variations within deep gray matter structures may affect the cortical networks involved in WM. To this aim, a large sample (n=181) of healthy subjects underwent a high-resolution structural magnetic resonance imaging (MRI) and a diffusion tensor imaging (DTI) scan protocol. Data of micro- (mean diffusivity, MD) and macro- (volume) structural variations of six bilateral deep gray matter structures (thalamus, caudate nucleus, putamen, hippocampus, amygdala and pallidum) and lateral ventriculi volume were analyzed in association with score in a WM (the so-called n-back task) and other neuropsychological tasks. Results showed that increased MD of bilateral thalami was the only structural parameter that significantly correlated with reduced WM performance. In particular, a voxel-by-voxel analysis revealed that the greater percentage of voxels showing significant anticorrelation between WM score and MD values were localized in those thalamic nuclei projecting to prefrontal and posterior parietal cortices. Results highlight the specific involvement of thalamus microstructure, not volume, in modulating WM performance, possibly by regulating the connections among cortical areas that are recruited during WM tasks. Copyright © 2010 IBRO. Published by Elsevier Ltd. All rights reserved.

  15. Viscoelastic performance of dielectric elastomer subject to different voltage stimulation

    Science.gov (United States)

    Sheng, Junjie; Zhang, Yuqing; Liu, Lei; Li, Bo; Chen, Hualing

    2017-04-01

    Dielectric elastomer (DE) is capable of giant deformation subject to an electric field, and demonstrates significant advantages in the potentially application of soft machines with muscle-like characteristics. Due to an inherent property of all macromolecular materials, DE exhibits strong viscoelastic properties. Viscoelasticity could cause a time-dependent deformation and lower the response speed and energy conversion efficiency of DE based actuators, thus strongly affect its electromechanical performance and applications. Combining with the rheological model of viscoelastic relaxation, the viscoelastic performance of a VHB membrane in a circular actuator configuration undergoing separately constant, ramp and sinusoidal voltages are analyzed both theoretically and experimentally. The theoretical results indicated that DE could attain a big deformation under a small constant voltage with a longer time or under a big voltage with a shorter time. The model also showed that a higher critical stretch could be achieved by applying ramping voltage with a lower rate and the stretch magnitude under sinusoidal voltage is much larger at a relatively low frequency. Finally, experiments were designed to validate the simulation and show well consistent with the simulation results.

  16. A Comparison of Tandem Walk Performance Between Bed Rest Subjects and Astronauts

    Science.gov (United States)

    Miller, Chris; Peters, Brian; Kofman, Igor; Philips, Tiffany; Batson, Crystal; Cerisano, Jody; Fisher, Elizabeth; Mulavara, Ajitkumar; Feiveson, Alan; Reschke, Millard; hide

    2015-01-01

    Astronauts experience a microgravity environment during spaceflight, which results in a central reinterpretation of both vestibular and body axial-loading information by the sensorimotor system. Subjects in bed rest studies lie at 6deg head-down in strict bed rest to simulate the fluid shift and gravity-unloading of the microgravity environment. However, bed rest subjects still sense gravity in the vestibular organs. Therefore, bed rest isolates the axial-unloading component, thus allowing for the direct study of its effects. The Tandem Walk is a standard sensorimotor test of dynamic postural stability. In a previous abstract, we compared performance on a Tandem Walk test between bed rest control subjects, and short- and long-duration astronauts both before and after flight/bed rest using a composite index of performance, called the Tandem Walk Parameter (TWP), that takes into account speed, accuracy, and balance control. This new study extends the previous data set to include bed rest subjects who performed exercise countermeasures. The purpose of this study was to compare performance during the Tandem Walk test between bed rest subjects (with and without exercise), short-duration (Space Shuttle) crewmembers, and long-duration International Space Station (ISS) crewmembers at various time points during their recovery from bed rest or spaceflight.

  17. Knowledge management performance methodology regarding manufacturing organizations

    Science.gov (United States)

    Istrate, C.; Herghiligiu, I. V.

    2016-08-01

    The current business situation is extremely complicated. Business must adapt to the changes in order (a) to survive on the increasingly dynamic markets, (b) to meet customers’ new request for complex, customized and innovative products. In modern manufacturing organizations it can be seen a substantial improvement regarding the management of knowledge. This occurs due to the fact that organizations realized that knowledge and an efficient management of knowledge generates the highest value. Even it could be said that the manufacturing organizations were and are the biggest beneficiary of KM science. Knowledge management performance (KMP) evaluation in manufacturing organizations can be considered as extremely important because without measuring it, they are unable to properly assess (a) what goals, targets and activities must have continuity, (b) what must be improved and (c) what must be completed. Therefore a proper KM will generate multiple competitive advantages for organizations. This paper presents a developed methodological framework regarding the KMP importance regarding manufacturing organizations. This methodological framework was developed using as research methods: bibliographical research and a panel of specialists. The purpose of this paper is to improve the evaluation process of KMP and to provide a viable tool for manufacturing organizations managers.

  18. Speech perception performance of subjects with type I diabetes mellitus in noise

    Directory of Open Access Journals (Sweden)

    Bárbara Cristiane Sordi Silva

    Full Text Available Abstract Introduction: Diabetes mellitus (DM is a chronic metabolic disorder of various origins that occurs when the pancreas fails to produce insulin in sufficient quantities or when the organism fails to respond to this hormone in an efficient manner. Objective: To evaluate the speech recognition in subjects with type I diabetes mellitus (DMI in quiet and in competitive noise. Methods: It was a descriptive, observational and cross-section study. We included 40 participants of both genders aged 18-30 years, divided into a control group (CG of 20 healthy subjects with no complaints or auditory changes, paired for age and gender with the study group, consisting of 20 subjects with a diagnosis of DMI. First, we applied basic audiological evaluations (pure tone audiometry, speech audiometry and immittance audiometry for all subjects; after these evaluations, we applied Sentence Recognition Threshold in Quiet (SRTQ and Sentence Recognition Threshold in Noise (SRTN in free field, using the List of Sentences in Portuguese test. Results: All subjects showed normal bilateral pure tone threshold, compatible speech audiometry and "A" tympanometry curve. Group comparison revealed a statistically significant difference for SRTQ (p = 0.0001, SRTN (p < 0.0001 and the signal-to-noise ratio (p < 0.0001. Conclusion: The performance of DMI subjects in SRTQ and SRTN was worse compared to the subjects without diabetes.

  19. Predicting the Performance of Organic Corrosion Inhibitors

    Directory of Open Access Journals (Sweden)

    David A. Winkler

    2017-12-01

    Full Text Available The withdrawal of effective but toxic corrosion inhibitors has provided an impetus for the discovery of new, benign organic compounds to fill that role. Concurrently, developments in the high-throughput synthesis of organic compounds, the establishment of large libraries of available chemicals, accelerated corrosion inhibition testing technologies, and the increased capability of machine learning methods have made discovery of new corrosion inhibitors much faster and cheaper than it used to be. We summarize these technical developments in the corrosion inhibition field and describe how data-driven machine learning methods can generate models linking molecular properties to corrosion inhibition that can be used to predict the performance of materials not yet synthesized or tested. We briefly summarize the literature on quantitative structure–property relationships models of small organic molecule corrosion inhibitors. The success of these models provides a paradigm for rapid discovery of novel, effective corrosion inhibitors for a range of metals and alloys in diverse environments.

  20. The performance of organic electronic ratchets

    Directory of Open Access Journals (Sweden)

    Erik M. Roeling

    2012-03-01

    Full Text Available Organic electronic ratchets rectify time-correlated external driving forces, giving output powers that can drive electronic circuitry. In this work their performance characteristics are investigated using numerical modeling and measurements. It is shown how the characteristic parameters of the time–varying asymmetric potential like length scales and amplitude, as well as the density and mobility of the charge carriers in the device influence the performance characteristics. Various ratchet efficiencies and their relations are discussed. With all settings close to optimum, a ratchet with charge displacement and power efficiencies close to 50% and 7% respectively is obtained.

  1. Incentives and performance governance of research organizations

    CERN Document Server

    Wollersheim, Jutta; Ringelhan, Stefanie; Osterloh, Margit

    2015-01-01

    ​This book contributes to the current discussion in society, politics and higher education on innovation capacity and the financial and non-financial incentives for researchers. The expert contributions in the book deal with implementation of incentive systems at higher education institutions in order to foster innovation. On the other hand, the book also discusses the extent to which governance structures from economy can be transferred to universities and how scientific performance can be measured and evaluated. This book is essential for decision-makers in knowledge-intensive organizations and higher-educational institutions dealing with the topic of performance management.

  2. Performance of FRCM strengthened beams subject to fatigue.

    Science.gov (United States)

    2017-05-31

    Fabric Reinforced Cementitious Matrix (FRCM) systems have been developed to strengthen or rehabilitate existing concrete and masonry structures subject to damage, steel reinforcement corrosion or requiring resistance capacity improvements due to incr...

  3. The impact of subjectivity in performance evaluation practices on public sector managers' motivation

    NARCIS (Netherlands)

    van Rinsum, M.; Verbeeten, F.H.M.

    2012-01-01

    We conduct an explorative study to investigate the effect of subjectivity in performance evaluation practices on managerial motivation in public sector organisations. Increased subjectivity can enhance motivation if supervisors are able to provide better informational feedback. However, subjectivity

  4. Subjective sleepiness and sleep quality in adolescents are related to objective and subjective measures of school performance

    OpenAIRE

    Annemarie eBoschloo; Lydia eKrabbendam; Sanne eDekker; Lee, Nikki C.; Renate ede Groot; Jelle eJolles

    2013-01-01

    This study investigated the relation between sleep and school performance in a large sample of 561 adolescents aged 11-18 years. Three subjective measures of sleep were used: sleepiness, sleep quality and sleep duration. They were compared to three measures of school performance: objective school grades, self-reported school performance, and parent-reported school performance. Sleepiness – ‘I feel sleepy during the first hours at school’ – appeared to predict both school grades and self-repor...

  5. Subjective sleepiness and sleep quality in adolescents are related to objective and subjective measures of school performance

    NARCIS (Netherlands)

    Boschloo, Annemarie; Krabbendam, Lydia; Dekker, Sanne; Lee, Nikki; De Groot, Renate; Jolles, Jelle

    2016-01-01

    This study investigated the relation between sleep and school performance in a large sample of 561 adolescents aged 11–18 years. Three subjective measures of sleep were used: sleepiness, sleep quality, and sleep duration. They were compared to three measures of school performance: objective school

  6. Subjective sleepiness and sleep quality in adolescents are related to objective and subjective measures of school performance

    NARCIS (Netherlands)

    Boschloo, Annemarie; Krabbendam, Lydia; Dekker, Sanne; Lee, Nikki; De Groot, Renate; Jolles, Jelle

    2018-01-01

    This study investigated the relation between sleep and school performance in a large sam- ple of 561 adolescents aged 11–18 years. Three subjective measures of sleep were used: sleepiness, sleep quality, and sleep duration. They were compared to three measures of school performance: objective school

  7. Subjective sleepiness and sleep quality in adolescents are related to objective and subjective measures of school performance

    NARCIS (Netherlands)

    Boschloo, A.; Krabbendam, L.; Dekker, S.; Lee, N.; Groot, R. de; Jolles, J.

    2013-01-01

    This study investigated the relation between sleep and school performance in a large sample of 561 adolescents aged 11-18 years. Three subjective measures of sleep were used: sleepiness, sleep quality, and sleep duration. They were compared to three measures of school performance: objective school

  8. 26 CFR 301.6104(d)-3 - Tax-exempt organization subject to harassment campaign.

    Science.gov (United States)

    2010-04-01

    ... campaign. 301.6104(d)-3 Section 301.6104(d)-3 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE... Returns and Records § 301.6104(d)-3 Tax-exempt organization subject to harassment campaign. (a) In general... subject of a harassment campaign and compliance with the requests that are part of the harassment campaign...

  9. Performance of organic grain legumes in Tuscany

    Directory of Open Access Journals (Sweden)

    Valentina Moschini

    2014-03-01

    Full Text Available In 2005-2007 growing season, few varieties of field bean, high protein pea and white lupin were compared in an organic farm of Central Italy (Mugello area, Tuscany, to evaluate their agronomic performance in terms of grain yield, nutritional quality and competitive ability against weeds. The experiment was performed under rain-fed conditions. Furthermore, grain legumes features were compared between two different sowing seasons (autumnal vs late-winter for two years, in order to get information on the best time of sowing of these species, and the stability of yields of different genotypes in those climatic and soil conditions. These legumes could be an alternative protein source to external soybean, a high-risk alimentary source of genetically modified organisms, in the organic livestock sector. The main findings indicate that higher yields in grain and crude protein were obtained with the pea species and in particular with cultivars Hardy (4.0 t/ha grain yield; 626 kg/ha crude protein yield and Classic (3.1 t/ha grain yield; 557 kg/ha crude protein yield; followed by field bean cv. Chiaro di Torre Lama (2.9 t/ha grain yield; 624 kg/ha crude protein yield and cv. Vesuvio (2.5 t/ha grain yield; 549 kg/ha crude protein yield. Furthermore the field bean is interesting for the stability of yield in both years despite climatic conditions rather different. The white lupin has showed the lower yield but the best values of grain quality, with higher values in lupin Multitalia for dry matter, crude protein and ether extract and in lupin Luxe also for crude fibre, respect to the other legumes analysed. Among lupin varieties, lupin Multitalia showed the best yield results for the pedo-climatic conditions of Mugello area (0.9 t/ha lupin Multitalia; 0.2 t/ha lupin Luxe. The total yield of organic grain legumes, in the experimental site, is resulted higher with an autumnal seeding respect to the late-winter seeding (2.8 t/ha vs 1.9 t/ha.

  10. The Impact of a Learning Organization on Performance: Focusing on Knowledge Performance and Financial Performance

    Science.gov (United States)

    Kim, Kyoungshin; Watkins, Karen E.; Lu, Zhenqiu

    2017-01-01

    Purpose: The purpose of this study is to examine the relationships among a learning organization, knowledge and financial performance using the Dimensions of the Learning Organization Questionnaire and its abbreviated version. Design/methodology/approach: This study used a secondary data set and performed second-order factor analysis and…

  11. Performativity / Expressivity: The Mobile Micro Screen and Its Subject.

    NARCIS (Netherlands)

    Verhoeff, N.|info:eu-repo/dai/nl/241603471

    2014-01-01

    Informed by a tradition of cinema and visual culture studies on the one hand, and science and technology studies and new materialism on the other, we mobilize Peircean semiotics in order to theorize new media technologies and related practices. Our question is, in what way performativity and

  12. Effect of oral dietary supplement for chicks subjected to thermal oscillation on performance and intestinal morphometry

    Directory of Open Access Journals (Sweden)

    Jovanir Inês Müller Fernandes

    2017-09-01

    Full Text Available The aim of the study was to evaluate the efficacy of a nutritional formulation based on amino acids and vitamins supplemented in the drinking water for chicks in the first week of life subjected to thermal oscillation on performance, organ development and intestinal morphometry from 1 to 21 days. 640-male broiler chicks were distributed in a 2x2 factorial completely randomized design (with or without dietary supplementation and at comfort temperature or thermal oscillation. Chicks subjected to thermal oscillation presented worse performance (p < 0.05 than those under thermal comfort of 1 to 7, 1 to 14 and 1 to 21 days. Nutritional supplementation did not alter the performance (p < 0.05 of the birds, but resulted in a higher body weight (p < 0.05 regardless of the environmental thermal condition. At 7 days, chicks under thermal comfort had better intestinal morphometric parameters (p < 0.05, in relation to birds under thermal oscillation. In conclusion, the temperature oscillations caused negative consequences to the productive performance and the intestinal morphology of chicks for which dietary supplementation was not enough to mitigate the effects of the environmental challenge during the first week of life of the birds.

  13. Subjective Sleepiness and Sleep Quality in Adolescents are Related to Objective and Subjective Measures of School Performance

    OpenAIRE

    Boschloo, Annemarie; Krabbendam, Lydia; Dekker, Sanne; Lee, Nikki; De Groot, Renate; Jolles, Jelle

    2013-01-01

    This study investigated the relation between sleep and school performance in a large sample of 561 adolescents aged 11–18 years. Three subjective measures of sleep were used: sleepiness, sleep quality, and sleep duration. They were compared to three measures of school performance: objective school grades, self-reported school performance, and parent-reported school performance. Sleepiness – “I feel sleepy during the first hours at school” – appeared to predict both school grades and self-repo...

  14. Interactions of task and subject variables among continuous performance tests.

    Science.gov (United States)

    Denney, Colin B; Rapport, Mark D; Chung, Kyong-Mee

    2005-04-01

    Contemporary models of working memory suggest that target paradigm (TP) and target density (TD) should interact as influences on error rates derived from continuous performance tests (CPTs). The present study evaluated this hypothesis empirically in a typically developing, ethnically diverse sample of children. The extent to which scores based on different combinations of these task parameters showed different patterns of relationship to age, intelligence, and gender was also assessed. Four continuous performance tests were derived by combining two target paradigms (AX and repeated letter target stimuli) with two levels of target density (8.3% and 33%). Variations in mean omission (OE) and commission (CE) error rates were examined within and across combinations of TP and TD. In addition, a nested series of structural equation models was utilized to examine patterns of relationship among error rates, age, intelligence, and gender. Target paradigm and target density interacted as influences on error rates. Increasing density resulted in higher OE and CE rates for the AX paradigm. In contrast, the high density condition yielded a decline in OE rates accompanied by a small increase in CEs using the repeated letter CPT. Target paradigms were also distinguishable on the basis of age when using OEs as the performance measure, whereas combinations of age and intelligence distinguished between density levels but not target paradigms using CEs as the dependent measure. Different combinations of target paradigm and target density appear to yield scores that are conceptually and psychometrically distinguishable. Consequently, developmentally appropriate interpretation of error rates across tasks may require (a) careful analysis of working memory and attentional resources required for successful performance, and (b) normative data bases that are differently stratified with respect to combinations of age and intelligence.

  15. Ecological performance of construction materials subject to ocean climate change.

    Science.gov (United States)

    Davis, Kay L; Coleman, Melinda A; Connell, Sean D; Russell, Bayden D; Gillanders, Bronwyn M; Kelaher, Brendan P

    2017-10-01

    Artificial structures will be increasingly utilized to protect coastal infrastructure from sea-level rise and storms associated with climate change. Although it is well documented that the materials comprising artificial structures influence the composition of organisms that use them as habitat, little is known about how these materials may chemically react with changing seawater conditions, and what effects this will have on associated biota. We investigated the effects of ocean warming, acidification, and type of coastal infrastructure material on algal turfs. Seawater acidification resulted in greater covers of turf, though this effect was counteracted by elevated temperatures. Concrete supported a greater cover of turf than granite or high-density polyethylene (HDPE) under all temperature and pH treatments, with the greatest covers occurring under simulated ocean acidification. Furthermore, photosynthetic efficiency under acidification was greater on concrete substratum compared to all other materials and treatment combinations. These results demonstrate the capacity to maximise ecological benefits whilst still meeting local management objectives when engineering coastal defense structures by selecting materials that are appropriate in an ocean change context. Therefore, mitigation efforts to offset impacts from sea-level rise and storms can also be engineered to alter, or even reduce, the effects of climatic change on biological assemblages. Copyright © 2017 Elsevier Ltd. All rights reserved.

  16. Islamic founding principles on organ transplantation and the evolution of Islamic scholarly opinions on the subject.

    Science.gov (United States)

    Kuddus, R H

    2014-01-01

    Muslims constitute about one-fourth of the human population, and a significant fraction of the organ recipients identify themselves as Muslims. A large fraction of the Muslim population is devout but unclear regarding the religious principles on organ donation and transplantation and is dependent on scholars' and imams' opinions. The Qur'an, the authentic Prophetic Traditions, and expert opinions on the subject were investigated. The sources of the Islamic founding principles on organ donation and transplantation are the Qur'an, the Prophetic Traditions, Usulul Fiqh or expert opinions based on the Qur'an and Traditions, and Maslaha or the principles of public interest deduced by the scholars. Some Muslim scholars, mostly from the Indian subcontinent, opine that live organ donation, extraction of organs from dead persons, and transplantation are prohibited. Many Arab scholars and Muslim scholars settled in the western hemisphere opine that live organ donation, organ extraction from dead persons, and transplantation are permitted, but organ donation must be a voluntary act of charity. Of late, the Iranian imams/scholars have recognized that the national government may acquire live donor organs for a uniform compensation and equitably distribute the acquired organs to patients with failing organs. The current Islamic working principles on transplantation medicine are nonuniform, transitory, and somewhat detached from the bulk of the population. How such heterogeneity is affecting transplantation medicine, and organ donation in particular, among Muslim populations warrants further investigation. Copyright © 2014 Elsevier Inc. All rights reserved.

  17. The organization of interaction of subjects of educational process when using platforms of distance learning

    Directory of Open Access Journals (Sweden)

    F. S. Mukhametzyanova

    2016-01-01

    Full Text Available Within research in article the special attention is paid to the organization of distance training by means of the specialized local tool information systems oriented to provision of a certain set of educational services on the Internet. On the basis of the carried-out analysis advantages of platforms of distance training are noted: availability, a personifitsirovannost, a modularity on structure, usability, etc. Characteristics «the subject - subject» interactions are described in case of remote form of education: an active position trained in the course of activities, equality of persons training and trained, the joint problem resolution, game, dialogue, work in microgroups, admissibility of coexistence and acceptance of the opposite points of view. Specifics of process of interaction of subjects of educational process in higher education institution of physical culture on the basis of use of the Moodle platform, performed with participation of students athletes, teachers, the trainer, the staff of department of information technologies, managerial control are considered. Feature of such interaction is caused by need students athletes to combine sport and training in the conditions of long sports trainings and participation in competitions in the cities remote from educational institution. The accurate list of functions of each of subjects in the scheme of interaction is provided. In tabular option the example of a matrix of elements of the training remote rate for students of different forms of education (internal, correspondence and full-time according to the individual training plan which implementation is impossible without harmonious work of all subjects involved in educational process is given. The schemes «the subject-subject» of interaction in case of distance training in higher education institution of physical culture with use of the Moodle platform are described. So for example, for students athletes of full-time courses

  18. The psychophysics of workload - A second look at the relationship between subjective measures and performance

    Science.gov (United States)

    Gopher, D.; Chillag, N.; Arzi, N.

    1985-01-01

    Load estimates based upon subjective and performance indices were compared for subjects performing size matching and letter typing tasks under 6 levels of priorities, in single and dual task conditions. Each half of the group used a different task as reference in their subjective judgement. The results are interpreted to indicate that subjective measures are especially sensitive to voluntary allocation of attention and to the load on working memory. Association with performance is expected whenever these two factors are main determinants of performance efficiency, otherwise the two are likely to dissociate.

  19. Subjective sleepiness and sleep quality in adolescents are related to objective and subjective measures of school performance

    Directory of Open Access Journals (Sweden)

    Annemarie eBoschloo

    2013-02-01

    Full Text Available This study investigated the relation between sleep and school performance in a large sample of 561 adolescents aged 11-18 years. Three subjective measures of sleep were used: sleepiness, sleep quality and sleep duration. They were compared to three measures of school performance: objective school grades, self-reported school performance, and parent-reported school performance. Sleepiness – ‘I feel sleepy during the first hours at school’ – appeared to predict both school grades and self-reported school performance. Sleep quality on the other hand – as a measure of (uninterrupted sleep and/or problems falling asleep or waking up – predicted parent-reported school performance. Self- and parent-reported school performance correlated only moderately with school grades. So it turns out that the measures used to measure either sleep or school performance impacts whether or not a relation is found. Further research on sleep and school performance should take this into account. The findings do underscore the notion that sleep in adolescence can be important for learning. They are compatible with the hypothesis that a reduced sleep quality can give rise to sleepiness in the first hours at school which results in lower school performance. This notion could have applied value in counseling adolescents and their parents in changing adolescents’ sleep behavior.

  20. Subjective Sleepiness and Sleep Quality in Adolescents are Related to Objective and Subjective Measures of School Performance.

    Science.gov (United States)

    Boschloo, Annemarie; Krabbendam, Lydia; Dekker, Sanne; Lee, Nikki; de Groot, Renate; Jolles, Jelle

    2013-01-01

    This study investigated the relation between sleep and school performance in a large sample of 561 adolescents aged 11-18 years. Three subjective measures of sleep were used: sleepiness, sleep quality, and sleep duration. They were compared to three measures of school performance: objective school grades, self-reported school performance, and parent-reported school performance. Sleepiness - "I feel sleepy during the first hours at school" - appeared to predict both school grades and self-reported school performance. Sleep quality on the other hand - as a measure of (un)interrupted sleep and/or problems falling asleep or waking up - predicted parent-reported school performance. Self- and parent-reported school performance correlated only moderately with school grades. So it turns out that the measures used to measure either sleep or school performance impacts whether or not a relation is found. Further research on sleep and school performance should take this into account. The findings do underscore the notion that sleep in adolescence can be important for learning. They are compatible with the hypothesis that a reduced sleep quality can give rise to sleepiness in the first hours at school which results in lower school performance. This notion could have applied value in counseling adolescents and their parents in changing adolescents' sleep behavior.

  1. THE STRESS RESISTANCE OF STUDENTS. THE PARADIGM OF SUBJECT PERSONALITY SELF- ORGANIZATION

    Directory of Open Access Journals (Sweden)

    Sergey I. Dyakov

    2016-01-01

    Full Text Available The aim of the investigation is to consider a problem of stress resistance of students in the context of subject self-organization of the personality. Methods. The following methods of research are used: questioning; psychological and diagnostic tests «Tolerance of Uncertainty» (NTN and «Personal Factors of Decisions» (PFD by T. V. Kornilova; original experimental experiences – «Coding», a technique of a self-assessment (scaling and «A locus control». While data processing the methods of mathematical statistics (SPSS 12 package – the correlation analysis of Pearson and the factorial analysis with rotation use a component by «verimax» method are applied. Results and scientific novelty. Types of subjectivity and strategy of stress resistance are allocated. The nature and a role of the emotional and stressful mechanism having information and semantic properties in its basis are disclosed. Communication of irresponsible mechanisms of mentality with the sphere of consciousness in the context of subjectivity of the personality is shown. Mechanisms of emotional and rational self-control of system of mental self-organization of the person are presented. The statistical and qualitative data opening communications between properties of subjectivity and stress resistance of the personality are empirically obtained. Variation of the relations and also types of subjectivity and stress resistance emphasized based on the results of the presented research. Original (author’s methods of studying of subjectivity and factors of stress resistance are presented. Practical significance. The revealed factors of subject self-organization reveal the stress-producing directions of the environment and the relation of the personality to situations of changes and uncertainty: and also indicate subject properties of resistance to stress which need to be developed to increase the level of health of students, to reduce risk of deviance and delinquency of

  2. Understanding Academic Performance in Organic Chemistry

    Science.gov (United States)

    Szu, Evan; Nandagopal, Kiruthiga; Shavelson, Richard J.; Lopez, Enrique J.; Penn, John H.; Scharberg, Maureen; Hill, Geannine W.

    2011-01-01

    Successful completion of organic chemistry is a prerequisite for many graduate and professional programs in science, technology, engineering, and mathematics, yet the failure rate for this sequence of courses is notoriously high. To date, few studies have examined why some students succeed while others have difficulty in organic chemistry. This…

  3. Multi-organ distribution of phosphorylated alpha-synuclein histopathology in subjects with Lewy body disorders.

    Science.gov (United States)

    Beach, Thomas G; Adler, Charles H; Sue, Lucia I; Vedders, Linda; Lue, Lihfen; White Iii, Charles L; Akiyama, Haru; Caviness, John N; Shill, Holly A; Sabbagh, Marwan N; Walker, Douglas G

    2010-06-01

    A sensitive immunohistochemical method for phosphorylated alpha-synuclein was used to stain sets of sections of spinal cord and tissue from 41 different sites in the bodies of 92 subjects, including 23 normal elderly, 7 with incidental Lewy body disease (ILBD), 17 with Parkinson's disease (PD), 9 with dementia with Lewy bodies (DLB), 19 with Alzheimer's disease with Lewy bodies (ADLB) and 17 with Alzheimer's disease with no Lewy bodies (ADNLB). The relative densities and frequencies of occurrence of phosphorylated alpha-synuclein histopathology (PASH) were tabulated and correlated with diagnostic category. The greatest densities and frequencies of PASH occurred in the spinal cord, followed by the paraspinal sympathetic ganglia, the vagus nerve, the gastrointestinal tract and endocrine organs. The frequency of PASH within other organs and tissue types was much lower. Spinal cord and peripheral PASH was most common in subjects with PD and DLB, where it appears likely that it is universally widespread. Subjects with ILBD had lesser densities of PASH within all regions, but had frequent involvement of the spinal cord and paraspinal sympathetic ganglia, with less-frequent involvement of end-organs. Subjects with ADLB had infrequent involvement of the spinal cord and paraspinal sympathetic ganglia with rare involvement of end-organs. Within the gastrointestinal tract, there was a rostrocaudal gradient of decreasing PASH frequency and density, with the lower esophagus and submandibular gland having the greatest involvement and the colon and rectum the lowest.

  4. Authors' response: 'Lung cancer risk in subjects exposed to organic dust'

    NARCIS (Netherlands)

    Peters, S.; Kromhout, H.; Olsson, A.; Straif, K.; Vermeulen, R.

    2012-01-01

    Response to: Mastrangelo, G., Rylander, R., Cegolon, L. & Lange, J.H. (2012). Lung cancer risk in subjects exposed to organic dust: an unexpected and surprising story. Thorax 67(12), 1112–1112. Original article: Peters, S., Kromhout, H., Olsson, A.C., Wichmann, H.-E., Brüske, I., Consonni, D.,

  5. The impact of Knowledge Management Infrastructure on Performance Effectiveness in Jordanian Organizations

    Directory of Open Access Journals (Sweden)

    Nasser Mohammad Soud Jaradat, Dr.

    2014-06-01

    Full Text Available This study aims to determine the impact of knowledge management infrastructure on the performance effectiveness of the Jordanian organizations that need knowledge to perform their work and tasks. The study sample includes some public and private organizations working in Jordan and dealing with the knowledge subjects. The findings indicated that there was a strong effect for knowledge management infrastructure on the performance effectiveness. Organizations should establish knowledge directorates to discover and transmit knowledge to workers with a view to improve the creativeness and distinctiveness of organizations.

  6. A multilevel approach to relating subjective workload to performance after shifts in task demand.

    Science.gov (United States)

    Mracek, Derek L; Arsenault, Matthew L; Day, Eric Anthony; Hardy, Jay H; Terry, Robert A

    2014-12-01

    The aim of this laboratory experiment was to demonstrate how taking a longitudinal, multilevel approach can be used to examine the dynamic relationship between subjective workload and performance over a given period of activity involving shifts in task demand. Subjective workload and conditions of the performance environment are oftentimes examined via cross-sectional designs without distinguishing within-from between-person effects. Given the dynamic nature of performance phenomena, multilevel designs coupled with manipulations of task demand shifts are needed to better model the dynamic relationships between state and trait components of subjective workload and performance. With a sample of 75 college students and a computer game representing a complex decision-making environment, increases and decreases in task demand were counterbalanced and subjective workload and performance were measured concurrently in regular intervals within performance episodes. Data were analyzed using hierarchical linear modeling. Both between- and especially within-person effects were dynamic. Nevertheless, at both levels of analysis, higher subjective workload reflected performance problems, especially more downstream from increases in task demand. As a function of cognitive-energetic processes, shifts in task demand are associated with changes in how subjective workload is related to performance over a given period of activity. Multilevel, longitudinal approaches are useful for distinguishing and examining the dynamic relationships between state and trait components of subjective workload and performance. The findings of this research help to improve the understanding of how a sequence of demands can exceed a performer's capability to respond to further demands.

  7. Determinants of Girls' Performance in Science, Mathematics and Technology Subjects in Public Secondary Schools in Kenya

    Science.gov (United States)

    Musau, Lydia Mbaki; Migosi, Joash; Muola, James Matee

    2013-01-01

    There has been incessant low academic performance in Science, Mathematics and Technology (SMT) subjects especially among girls at form four level in Kitui Central District over the years. The aim of this study was to investigate the determinants of girls' performance in SMT subjects in public secondary schools. Using ex-post-facto survey research…

  8. Authenticity and Subjective Wellbeing within the Context of a Religious Organization

    Directory of Open Access Journals (Sweden)

    Antonio Ariza-Montes

    2017-07-01

    Full Text Available Although authenticity has a long history as a philosophical and psychological idea, this concept has received scarce attention in the business literature until very lately. Nevertheless, scholars belonging to a broad array of disciplines have pointed out the escalation in the individuals’ search for authenticity within developed societies. Hence, the purpose of this paper is to assess the link between authenticity and subjective wellbeing within the rarely explored context of faith-driven organizations, where the management of emotions attains a particular significance. Specifically, this study links authenticity with subjective wellbeing among the distinct groups that shape a large international Catholic organization. This study uses Partial Least Squares (PLS to test our research model and hypotheses. This paper covers two noteworthy research gaps. On the one hand, it provides evidence of the relationship between authenticity and subjective wellbeing within the context of religious organizations. On the other hand, our results suggest that this relationship is not homogeneous among the distinct groups that shape the organization. Implications of the research are finally discussed.

  9. Authenticity and Subjective Wellbeing within the Context of a Religious Organization

    Science.gov (United States)

    Ariza-Montes, Antonio; Giorgi, Gabriele; Leal-Rodríguez, Antonio; Ramírez-Sobrino, Jesús

    2017-01-01

    Although authenticity has a long history as a philosophical and psychological idea, this concept has received scarce attention in the business literature until very lately. Nevertheless, scholars belonging to a broad array of disciplines have pointed out the escalation in the individuals’ search for authenticity within developed societies. Hence, the purpose of this paper is to assess the link between authenticity and subjective wellbeing within the rarely explored context of faith-driven organizations, where the management of emotions attains a particular significance. Specifically, this study links authenticity with subjective wellbeing among the distinct groups that shape a large international Catholic organization. This study uses Partial Least Squares (PLS) to test our research model and hypotheses. This paper covers two noteworthy research gaps. On the one hand, it provides evidence of the relationship between authenticity and subjective wellbeing within the context of religious organizations. On the other hand, our results suggest that this relationship is not homogeneous among the distinct groups that shape the organization. Implications of the research are finally discussed. PMID:28769854

  10. Authenticity and Subjective Wellbeing within the Context of a Religious Organization.

    Science.gov (United States)

    Ariza-Montes, Antonio; Giorgi, Gabriele; Leal-Rodríguez, Antonio; Ramírez-Sobrino, Jesús

    2017-01-01

    Although authenticity has a long history as a philosophical and psychological idea, this concept has received scarce attention in the business literature until very lately. Nevertheless, scholars belonging to a broad array of disciplines have pointed out the escalation in the individuals' search for authenticity within developed societies. Hence, the purpose of this paper is to assess the link between authenticity and subjective wellbeing within the rarely explored context of faith-driven organizations, where the management of emotions attains a particular significance. Specifically, this study links authenticity with subjective wellbeing among the distinct groups that shape a large international Catholic organization. This study uses Partial Least Squares (PLS) to test our research model and hypotheses. This paper covers two noteworthy research gaps. On the one hand, it provides evidence of the relationship between authenticity and subjective wellbeing within the context of religious organizations. On the other hand, our results suggest that this relationship is not homogeneous among the distinct groups that shape the organization. Implications of the research are finally discussed.

  11. Impact of glucose metabolism and birth size on cognitive performance in elderly subjects.

    Science.gov (United States)

    Paile-Hyvärinen, Maria; Räikkönen, Katri; Kajantie, Eero; Darby, David; Ylihärsilä, Hilkka; Salonen, Minna K; Osmond, Clive; Eriksson, Johan G

    2009-03-01

    We aimed to investigate the impact of diabetes and impaired glucose tolerance on cognitive performance and to explore the association between birth weight and cognitive performance among diabetic subjects. We performed a standard oral glucose tolerance test and a computerised test for assessment of cognitive performance (CogState) in 1243 subjects; 173 of them had type 2 diabetes. At the time of cognitive testing the mean age of the subjects was 64 years. Subjects with type 1 diabetes or a history of stroke were excluded. Subjects with known diabetes performed significantly poorer in cognitive tasks measuring visual attention, working memory and episodic learning than subjects with normal glucose tolerance. Subjects with newly diagnosed diabetes or milder impairments in glucose regulation did not differ from the normoglycaemic group. A low birth weight enhanced the association between diabetes and poor performance in the working memory and episodic learning tasks. Poorer cognitive performance was associated with known type 2 diabetes but not with newly diagnosed diabetes or milder impairments in glucose regulation. Low birth weight was found to be an additional vulnerability factor enhancing cognitive decline in diabetic subjects.

  12. Round robin performance testing of organic photovoltaic devices

    DEFF Research Database (Denmark)

    Gevorgyan, Suren; Zubillaga, Oihana; de Seoane, José María Vega

    2014-01-01

    This study addresses the issue of poor intercomparability of measurements of organic photovoltaic (OPV) devices among different laboratories. We present a round robin performance testing of novel OPV devices among 16 laboratories, organized within the framework of European Research Infrastructure...

  13. Differentiation, Interdependence, and Performance in Formal Organizations.

    Science.gov (United States)

    Pennings, Johannes M.

    Studying 40 branch offices of a large brokerage firm, the investigator attempted to develop a framework for theoretically and operationally defining the concept of interdependence in organizations. After defining task, position-role, social, and skill interdependence, the author explores the consequences of differentiation in terms of the…

  14. PLAN FOR PERFORMANCE ADMINISTRATION IN PYRAMIDAL STRUCTURE ORGANIZATIONS

    Directory of Open Access Journals (Sweden)

    Domingo Alarcón Ortiz

    2013-11-01

    Full Text Available Performance administration has become a current strategy in evaluating management within organizations, but its implementation often lacks an action plan, resulting from the valuation of climate and leadership styles embedded in the culture of the organization. This paper proposes a model action plan for performance management, which has been implemented, executed and evaluated in pyramidal organizational structure organizations where a diagnosis of the cultural climate and leadership styles recurring in the organization have been previously made.

  15. Accounting for results: how conservation organizations report performance information.

    Science.gov (United States)

    Rissman, Adena R; Smail, Robert

    2015-04-01

    Environmental program performance information is in high demand, but little research suggests why conservation organizations differ in reporting performance information. We compared performance measurement and reporting by four private-land conservation organizations: Partners for Fish and Wildlife in the US Fish and Wildlife Service (national government), Forest Stewardship Council-US (national nonprofit organization), Land and Water Conservation Departments (local government), and land trusts (local nonprofit organization). We asked: (1) How did the pattern of performance reporting relationships vary across organizations? (2) Was political conflict among organizations' principals associated with greater performance information? and (3) Did performance information provide evidence of program effectiveness? Based on our typology of performance information, we found that most organizations reported output measures such as land area or number of contracts, some reported outcome indicators such as adherence to performance standards, but few modeled or measured environmental effects. Local government Land and Water Conservation Departments reported the most types of performance information, while local land trusts reported the fewest. The case studies suggest that governance networks influence the pattern and type of performance reporting, that goal conflict among principles is associated with greater performance information, and that performance information provides unreliable causal evidence of program effectiveness. Challenging simple prescriptions to generate more data as evidence, this analysis suggests (1) complex institutional and political contexts for environmental program performance and (2) the need to supplement performance measures with in-depth evaluations that can provide causal inferences about program effectiveness.

  16. A Self-Organizing Approach to Subject-Verb Number Agreement.

    Science.gov (United States)

    Smith, Garrett; Franck, Julie; Tabor, Whitney

    2018-02-01

    We present a self-organizing approach to sentence processing that sheds new light on notional plurality effects in agreement attraction, using pseudopartitive subject noun phrases (e.g., a bottle of pills). We first show that notional plurality ratings (numerosity judgments for subject noun phrases) predict verb agreement choices in pseudopartitives, in line with the "Marking" component of the Marking and Morphing theory of agreement processing. However, no account to date has derived notional plurality values from independently needed principles of language processing. We argue on the basis of new experimental evidence and a dynamical systems model that the theoretical black box of notional plurality can be unpacked into objectively measurable semantic features. With these semantic features driving structure formation (and hence agreement choice), our model reproduces the human verb production patterns as a byproduct of normal processing. Finally, we discuss how the self-organizing approach might be extended to other agreement attraction phenomena. © 2018 Cognitive Science Society, Inc.

  17. High performance organic solar cell architectures

    Science.gov (United States)

    Inoue, Kanzan

    This research is dedicated to the study of physical processes in solar cells based on organic polymers and small molecules, which may replace fossil-fuel based energy sources in future. The bulk of this research involves (1) improving charge generation and collection in well known bulk heterojunction polymer/fullerene-based devices via creating a percolating interpenetrating networks for further efficiency improvement, (2) developing new device architectures for multi-junction organic photovoltaics, and (3) developing new methods for encapsulation of organic solar cells by multilayer coatings. For bulk heterojunction Regio Regular P3HT/PCBM-based devices, the importance of pre-production and optimum post-production heat treatment conditions have been studied for different P3HT molecular weights and a record-breaking power conversion efficiency near 4% was achieved. This effect is partially achieved because annealing induces better crystalinity and hence increases the charge mobility in Regio Regular P3HT and initiates a diffusion controlled formation of PCBM network. This is reflected in the improvement of Fill Factor. The importance of pre-production to create a fine homogenization was discovered in this project. The novel electron and hole blocking layers deployed bulk heterojunction devices have been developed and the further improvement in the charge collection efficiency and fill factor were observed. Combining the P3HT/PCBM-based back cell with small organic molecular front cell, a new spectrally asymmetric multi-junction tandem device prototype has been created. With this device, wide range of solar spectra can be observed and open-circuit voltage greater than 1V can be routinely achieved, compared to 0.5--0.6V in conventional one layer devices. Purely polymeric tandem cell has also been tested. Such devices have a great prospect of low cost mass production.

  18. Double coupling: modeling subjectivity and asymmetric organization in social-ecological systems

    Directory of Open Access Journals (Sweden)

    David Manuel-Navarrete

    2015-09-01

    Full Text Available Social-ecological organization is a multidimensional phenomenon that combines material and symbolic processes. However, the coupling between social and ecological subsystem is often conceptualized as purely material, thus reducing the symbolic dimension to its behavioral and actionable expressions. In this paper I conceptualize social-ecological systems as doubly coupled. On the one hand, material expressions of socio-cultural processes affect and are affected by ecological dynamics. On the other hand, coupled social-ecological material dynamics are concurrently coupled with subjective dynamics via coding, decoding, personal experience, and human agency. This second coupling operates across two organizationally heterogeneous dimensions: material and symbolic. Although resilience thinking builds on the recognition of organizational asymmetry between living and nonliving systems, it has overlooked the equivalent asymmetry between ecological and socio-cultural subsystems. Three guiding concepts are proposed to formalize double coupling. The first one, social-ecological asymmetry, expands on past seminal work on ecological self-organization to incorporate reflexivity and subjectivity in social-ecological modeling. Organizational asymmetry is based in the distinction between social rules, which are symbolically produced and changed through human agents' reflexivity and purpose, and biophysical rules, which are determined by functional relations between ecological components. The second guiding concept, conscious power, brings to the fore human agents' distinctive capacity to produce our own subjective identity and the consequences of this capacity for social-ecological organization. The third concept, congruence between subjective and objective dynamics, redefines sustainability as contingent on congruent relations between material and symbolic processes. Social-ecological theories and analyses based on these three guiding concepts would support the

  19. Theta power decreases in preparation for voluntary isometric contractions performed with maximal subjective effort.

    Science.gov (United States)

    Weiss, T; Sust, M; Beyer, L; Hansen, E; Rost, R; Schmalz, T

    1995-07-07

    In order to find EEG parameters that can be attributed to movements performed with maximal subjective effort, EEG recordings and force measurements were realized in connection with isometric contractions (IMC). IMC were performed with submaximal and maximal subjective effort. Mean spectral power density within the theta band was found as an indicator for maximal subjective effort. The theta power across the parieto-occipital area decreases from rest through movements performed with submaximal force to movements performed with maximal effort. It is argued that this theta decrease possibly reflects a down-regulation of the posterior attention system in order to minimize the influences of external stimuli during the preparation for voluntary IMC performed with maximal subjective effort.

  20. Trends in Schooling: Demography, Performance and Organization.

    Science.gov (United States)

    Mare, Robert D.

    1981-01-01

    Utilizing "Social Indicators" (1979), discusses growth and distribution of schooling in the U.S., trends in student test performance, and major organizational changes in elementary/secondary education. Comments on quality of available data and suggests improvements for future reporting of educational indicators. (Reprint of article is available…

  1. Strategic Performance Options in Professional Service Organizations

    NARCIS (Netherlands)

    Doorewaard, J.A.C.M.; Meihuizen, H.E.

    2000-01-01

    In the current debate on HRM and organisational performance (Mahoney and Pandian, 1992; Storey, 1992; Paauwe, 1994; Wright et al, 1994; Flood et al, 1995; Becker and Gerhardt, 1996; Boxall, 1996; Mueller, 1996; Beatty and Schneider, 1997; Coff, 1997; Guest, 1997; Paauwe and Richardson, 1997;

  2. MANAGING SOCIAL CAPITAL AND DIVERSITY FOR PERFORMANCE IN PUBLIC ORGANIZATIONS

    NARCIS (Netherlands)

    Compton, Mallory E.; Meier, Kenneth J.

    Managers concerned with the performance of their organizations will exploit available social, administrative, and human capital resources. However, extant theory and mixed empirical evidence leave the effect of social capital on performance unclear. The gains from these norms of reciprocity,

  3. Forest products research and development organizations : organization, governance, and measures of performance in a worldwide setting

    Science.gov (United States)

    Paul V. Ellefson; M.A. Kilgore; Kenneth E. Skog; Christopher D. Risbrudt

    2007-01-01

    The ability of forest products research and development organizations to contribute to a nation’s well-being requires that they be well organized, effectively managed, and held to high standards of performance. In order to obtain a better understanding of how such organizations are structured and administered, and how they judge organizational performance, a review of...

  4. Forward lunge as a functional performance test in ACL deficient subjects: test-retest reliability

    DEFF Research Database (Denmark)

    Alkjaer, Tine; Henriksen, Marius; Dyhre-Poulsen, Poul

    2009-01-01

    The forward lunge movement may be used as a functional performance test of anterior cruciate ligament (ACL) deficient and reconstructed subjects. The purposes were 1) to determine the test-retest reliability of a forward lunge in healthy subjects and 2) to determine the required numbers...

  5. Subjective Performance Evaluations, Self-esteem, and Ego-threats in Principal-agent Relations

    DEFF Research Database (Denmark)

    Sebald, Alexander Christopher; Walzl, Markus

    find that agents sanction whenever the feedback of principals is below their subjective self-evaluations even if the agents' payoff is independent of the principals' feedback. Based on our experimental analysis we propose a principal-agent model with subjective performance evaluations that accommodates...

  6. Stress and Performance: Effects of Subjective Work Load and Time Urgency.

    Science.gov (United States)

    Friend, Kenneth E.

    1982-01-01

    Measured subjective work load, time urgency, and other stress/motivation variables for management personnel taking a demanding problem-solving exam. Data suggest increases in psychological stresses like subjectively high work load and time urgency uniformly impair performance across the whole range of these variables. (Author)

  7. A method to evaluate performance reliability of individual subjects in laboratory research applied to work settings.

    Science.gov (United States)

    1978-10-01

    This report presents a method that may be used to evaluate the reliability of performance of individual subjects, particularly in applied laboratory research. The method is based on analysis of variance of a tasks-by-subjects data matrix, with all sc...

  8. Subjective user experience and performance with active tangibles on a tabletop interface

    NARCIS (Netherlands)

    Erp, J.B. van; Toet, A.; Meijer, K.; Janssen, J.; Jong, A. de

    2015-01-01

    We developed active tangibles (Sensators) that can be used in combination with multitouch tabletops and that can provide multisensory (visual, auditory, and vibrotactile) feedback. For spatial alignment and rotation tasks we measured subjective user experience and objective performance with these

  9. Subjective User Experience and Performance with Active Tangibles on a Tabletop Interfaces.

    NARCIS (Netherlands)

    van Erp, Johannes Bernardus Fransiscus; Toet, Alexander; Meijer, Koos; Janssen, Joris; Jong, Arnoud

    We developed active tangibles (Sensators) that can be used in combination with multitouch tabletops and that can provide multisensory (visual, auditory, and vibrotactile) feedback. For spatial alignment and rotation tasks we measured subjective user experience and objective performance with these

  10. The Relationship between Learning Organization Dimensions and Library Performance

    Science.gov (United States)

    Haley, Qing Kong

    2010-01-01

    The purpose of this research was to examine the relationship between learning organization dimensions and academic library performance. It studied whether differences existed in learning organization dimensions given the predictor variables of performance indicators, library resources, and demographics of the academic library. This research…

  11. Conceptualizing Learning Organization towards Sustaining Learning Organization’s Performance

    OpenAIRE

    Muhammad Faizal Iylia Mohd Ghazali; Norliya Ahmad Kassim; Lokman Hakim Khalib; Muhammad Nurjufri Jaafar; Muhammad Ariff Idris

    2015-01-01

    A learning organization is a place where people in the organization are powerfully learning collectively and by their own to expand their knowledge and skills so that they can enhance and optimize their organizational performance at the maximum. This paper reviews the literature that leads to developing a conceptual framework of a study on the factors of learning organization towards sustaining an organization’s performance. Based on the literature review, three main independent variables are...

  12. Conversion to organic wine production: exploring the economic performance impacts

    OpenAIRE

    Nisén, Pia

    2014-01-01

    This study focuses on understanding the relationship between organic wine production and economic performance. The aim of this study is to clarify, what are the economic impacts that result from the conversion of wine production from conventional to organic. This is an interesting topic to be explored in more detail because despite the increasing demand of organic wine and share of vineyard area used for organic winemaking, the economic consequences of the conversion are still somewhat unclea...

  13. Automated abdominal multi-organ segmentation with subject-specific atlas generation.

    Science.gov (United States)

    Wolz, Robin; Chu, Chengwen; Misawa, Kazunari; Fujiwara, Michitaka; Mori, Kensaku; Rueckert, Daniel

    2013-09-01

    A robust automated segmentation of abdominal organs can be crucial for computer aided diagnosis and laparoscopic surgery assistance. Many existing methods are specialized to the segmentation of individual organs and struggle to deal with the variability of the shape and position of abdominal organs. We present a general, fully-automated method for multi-organ segmentation of abdominal computed tomography (CT) scans. The method is based on a hierarchical atlas registration and weighting scheme that generates target specific priors from an atlas database by combining aspects from multi-atlas registration and patch-based segmentation, two widely used methods in brain segmentation. The final segmentation is obtained by applying an automatically learned intensity model in a graph-cuts optimization step, incorporating high-level spatial knowledge. The proposed approach allows to deal with high inter-subject variation while being flexible enough to be applied to different organs. We have evaluated the segmentation on a database of 150 manually segmented CT images. The achieved results compare well to state-of-the-art methods, that are usually tailored to more specific questions, with Dice overlap values of 94%, 93%, 70%, and 92% for liver, kidneys, pancreas, and spleen, respectively.

  14. The effects of posture and subject-to-subject variations on the position, shape and volume of abdominal and thoracic organs.

    Science.gov (United States)

    Beillas, Philippe; Lafon, Yoann; Smith, Francis W

    2009-11-01

    In this study, the thorax and the abdomen of nine subjects were imaged in four postures using a positional MRI scanner. The four postures were seated, standing, forward-flexed and supine. They were selected to represent car occupants, pedestrians, cyclists and a typical position for medical imaging, respectively. Geometrical models of key anatomical structures were registered from the imaging dataset using a custom registration toolbox. The analysis of the images and models allowed the quantification of the respective effects of posture and subject-to-subject variation on the position, shape and volume of the abdominal organs, skeletal components and thoracic cavity. In summary, except for the supine posture, the organ volumes and their positions in the spinal frame were mostly unaffected by the posture. The supine posture was associated with a motion of all solid organs of up to 39 mm (interpostural maximum for the liver, n=9), and a reduction of the thoracic cavity volume of up to 1300 cm3. Subject-to-subject variations were especially large for the volume of the spleen (variations between 120 and 400 cm3) and the position of the kidneys. As a result, subject-to-subject variations were larger than most postural effects. Other results include values of parameters that can help positioning human models such as positions, volumes and inertial properties of organs as well as skeletal parameters. Overall, this study suggests that subject-to-subject variations and the use of supine geometrical data can be problematic for finite element modeling of the abdomen for injury prediction.

  15. Predicting subjective vitality and performance in sports: the role of passion and achievement goals.

    Science.gov (United States)

    Li, Chiung-Huang

    2010-06-01

    The major purpose of this study was to test the hypothesized paths from dualistic passions through achievement goals to subjective vitality and performance in sports. 645 high school athletes participated. The proposed structural equation model, with relationships between dualistic passions and subjective vitality and sports performance mediated by achievement goals, fit the data well, especially for mastery-approach and performance-approach goals. Harmonious and obsessive passions may lead athletes to high performance via the adoption of mastery-approach goals. However, these passions seem to have two paths influencing personal functioning: direct effects make players feel energetic, and indirect effects on subjective vitality through adoption of mastery-approach and performance-approach goals.

  16. Static, dynamic balance and functional performance in subjects with and without plantar fasciitis

    Directory of Open Access Journals (Sweden)

    Geiseane Aguiar Gonçalves

    Full Text Available Abstract Introduction: Plantar fasciitis (PF is characterized by non-inflammatory degeneration and pain under the heel, and is one of the most common foot complaints. The compensations and adjustments made to decrease the discomfort caused by the disease are clinical findings and can be a factor that contributes to impaired balance and decreased functional performance. Objective: To compare functional performance as well as static and dynamic balance among subjects with and without PF. Methods: The sample consisted of 124 subjects of both sexes aged 20-60 years. Participants were divided into two groups: a bilateral PF group (PFG; n = 62 and a control group (CG, n = 62. The following outcomes were analyzed: static and dynamic balance (using functional tests and functional performance (using a questionnaire. We used Student’s t test for independent samples to compare variables between the groups. The alpha error was set at 0.05. Results: Subjects with PF showed greater impairment in their overall dynamic balance performance (p < 0.001 than the control group, except for left posteromedial movement (p = 0.19. The CG showed showed better functional performance (p < 0.001 than the PF group. There was no difference between groups for the variable static balance on stable (p = 0.160 and unstable surfaces (p = 0.085. Conclusion: Subjects with PF displayed smaller reach distances in the overall Star Excursion Balance Test (SEBT, demonstrating a deficit in dynamic balance and functional performance when compared with healthy subjects.

  17. Nutritional status, yield and composition of peach fruit subjected to the application of organic compost

    Directory of Open Access Journals (Sweden)

    George Wellington Bastos de Melo

    2016-01-01

    Full Text Available The purpose of this study was to evaluate the nutritional state, yield and composition of peaches on peach trees subjected to the application of organic compost to the soil. This experiment was conducted during the 2008 and 2009 cropping season in an orchard containing Chimarrita cultivars grafted onto Capdeboscq rootstocks and Haplumbrept soils in the municipality of Farroupilha (RS, Brazil. The treatments included 0, 9, 18, 36, 72 and 144 liters of organic compost per plant-1 year-1. The total nutrient contents in the leaves, yield components, yields per plant and hectare and compositions of the fruits were evaluated in 2008 and 2009 soon after harvest and after 30 days of storage. The application of organic compost to the soil increased the yield components and the yields per plant and hectare in the two treatments with the highest compost additions, which indicated that the addition of 72 L of compost per plant-1 is ideal economically. The organic compost had little effect on the composition of the peach fruit after harvest and after 30 days of storage.

  18. The Mulligan ankle taping does not affect balance performance in healthy subjects: a prospective, randomized blinded trial.

    Science.gov (United States)

    de-la-Morena, Jose Maria Delfa; Alguacil-Diego, Isabel Maria; Molina-Rueda, Francisco; Ramiro-González, Maria; Villafañe, Jorge Hugo; Fernández-Carnero, Josué

    2015-05-01

    [Purpose] The aim of this study was to evaluate the immediate effects of Mulligan fibular taping on static and dynamic postural balance in healthy subjects using computerized dynamic posturography (CDP). [Subjects and Methods] Forty-four volunteers (26 males and 18 females) aged 21 ±2 years participated in the study. The Mulligan tape was applied by a specialist in this technique. The placebo group received a treatment with a similar tape but with several cuts to avoid the fibular repositioning effect produced by Mulligan tape. The Sensory Organization Test (SOT) and the Motor Control Test (MCT) were performed by each subject at baseline and after the interventions. Outcome measures included equilibrium and strategy scores from each trial and condition of the SOT, and speed of reaction (latency period) from the MCT. [Results] Mulligan ankle taping did not have an impact on postural control during static and dynamic balance in subjects with healthy ankles when compared with placebo taping. [Conclusion] There was no difference in, equilibrium and strategy (SOT) and speed of reaction (MCT) in any of the subjects in this study. Therefore, this study suggests that Mulligan ankle taping does not have an impact on balance in healthy subjects.

  19. The effects of energy drink in combination with alcohol on performance and subjective awareness

    OpenAIRE

    Alford, Chris; Hamilton-Morris, Jennifer; Verster, Joris C

    2012-01-01

    Rationale This study investigated the coadministration of an energy drink with alcohol to study the effects on subjective intoxication and objective performance. Objectives This study aims to evaluate the objective and subjective effects of alcohol versus placebo at two alcohol doses, alone and in combination with an energy drink, in a balanced order, placebo-controlled, double-blind design. Methods Two groups of ten healthy volunteers, mean (SD) age of 24 (6.5), participated in the study. On...

  20. Subjective trust, perceived risk and exchange performance in buyer-supplier relationships

    OpenAIRE

    Emanuela Delbufalo

    2012-01-01

    This article offers some theoretical and empirical contributions to the literature on relational exchange by examining the nature of subjective trust and perceived risk in buyer-supplier relationships. The relational view represents the theoretical framework for the research. The study explores the theoretical proposition that subjective trust and perceived risk in buyer-supplier relationships impact on exchange performance through the mediating effects of four sources of relational rents: as...

  1. Identification of Employee Performance Appraisal Methods in Agricultural Organizations

    Directory of Open Access Journals (Sweden)

    Venclova Katerina

    2013-06-01

    Full Text Available A formal employee performance appraisal is regarded as one of the tools of human resources performance management. People, their knowledge and skills are currently considered to be the most valuable resource a company has. The article focuses on methods of employee performance appraisal in agricultural organizations in the Czech Republic. The first part of the article deals with the theoretical background of the term “formal appraisal” and employee performance appraisal methods as defined by Czech and foreign specialists. Further, the article describes, based on a questionnaire survey, employee performance appraisal methods that are considered importantfor the agricultural organizations in the Czech Republic. The aim of the article is to identify the current state of formal employee appraisal in a sample group of agricultural organizationsand to test dependencies between selected qualitative characteristics. The outcomes show that the most commonly used methods of employee performance appraisal in agricultural organizations include predefined goal-based performance appraisal, predefined standard outcome-based performance appraisal and appraisal interviews. Agricultural organizations apply these methodsin particular due to the fact that their findings are further utilized in other areas of human resource management, such as reward system and personnel planning. In statistical terms, dependencybetween the method of employee performance appraisal according to predefined goals applied by agricultural organizations and personnel planning (an area of human resources managementhas been proven (p-value: 0.032, Phi coefficient: 4.578.

  2. Improved automated perimetry performance in elderly subjects after listening to Mozart

    Directory of Open Access Journals (Sweden)

    Junia Cabral Marques

    2009-01-01

    Full Text Available PURPOSE: To evaluate the performance of automated perimetry of elderly subjects naïve to AP after listening to a Mozart sonata. INTRODUCTION: Automated perimetry (AP is a psychophysical test used to assess visual fields in patients with neurological disorders and glaucoma. In a previous study, Fiorelli et al. showed that young subjects who listened to a Mozart sonata prior to undergoing AP performed better in terms of reliability than those who did not listen to the sonata. METHODS: Fifty-two AP-naïve, normal subjects underwent Automated perimetry (SITA 24-2. The study group (25 subjects underwent AP after listening to Mozart's Sonata for Two Pianos in D Major, and the control group (27 subjects underwent Automated perimetry without prior exposure to the music. RESULTS: The study group had significantly lower false negative rates and a lower visual field reliability score than the controls (P=0.04 and P=0.04, respectively. The test time was shorter for the study group (P=0.03. DISCUSSION: This study shows that elderly subjects, when exposed to the Mozart sonata immediately before AP testing, have lower false negative rates and lower visual field reliability scores when compared with an age- and gender-matched control group. Our results differ from those of Fiorelli et al. who found lower false positive rates and less fixation loss in addition to lower false negative rates. CONCLUSION: Listening to a Mozart sonata seems to improve automated perimetry reliability in elderly subjects.

  3. Improved automated perimetry performance in elderly subjects after listening to Mozart.

    Science.gov (United States)

    Marques, Junia Cabral; Vanessa, Adriana Chaves Oliveira; Fiorelli, Macedo Batista; Kasahara, Niro

    2009-01-01

    To evaluate the performance of automated perimetry of elderly subjects naïve to AP after listening to a Mozart sonata. Automated perimetry (AP) is a psychophysical test used to assess visual fields in patients with neurological disorders and glaucoma. In a previous study, Fiorelli et al. showed that young subjects who listened to a Mozart sonata prior to undergoing AP performed better in terms of reliability than those who did not listen to the sonata. Fifty-two AP-naïve, normal subjects underwent Automated perimetry (SITA 24-2). The study group (25 subjects) underwent AP after listening to Mozart's Sonata for Two Pianos in D Major, and the control group (27 subjects) underwent Automated perimetry without prior exposure to the music. The study group had significantly lower false negative rates and a lower visual field reliability score than the controls (P=0.04 and P=0.04, respectively). The test time was shorter for the study group (P=0.03). This study shows that elderly subjects, when exposed to the Mozart sonata immediately before AP testing, have lower false negative rates and lower visual field reliability scores when compared with an age- and gender-matched control group. Our results differ from those of Fiorelli et al. who found lower false positive rates and less fixation loss in addition to lower false negative rates. Listening to a Mozart sonata seems to improve automated perimetry reliability in elderly subjects.

  4. CULTURE – GROWTH FACTOR OF THE PERFORMANCE OF THE ORGANIZATION

    OpenAIRE

    MIRCEA DRAGHICI

    2011-01-01

    One of the main issues reflected in this paper is that of the relationship between organizational culture, organizational change and the strategy of the organization. Besides this, another underlined aspect is that there is a strong connection between organizational culture and the community and environment the organization presides in. Also, by understanding the organizational culture we take a step forward in improving the performance of the organizations. Another fact to be taken into acco...

  5. Advanced Organic Permeable-Base Transistor with Superior Performance.

    Science.gov (United States)

    Klinger, Markus P; Fischer, Axel; Kaschura, Felix; Scholz, Reinhard; Lüssem, Björn; Kheradmand-Boroujeni, Bahman; Ellinger, Frank; Kasemann, Daniel; Leo, Karl

    2015-12-16

    An optimized vertical organic permeable-base transistor (OPBT) competing with the best organic field-effect transistors in performance, while employing low-cost fabrication techniques, is presented. The OPBT stands out by its excellent power efficiency at the highest frequencies. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  6. Impact of Performance Management in Public and Private Organizations

    DEFF Research Database (Denmark)

    Hvidman, Ulrik; Andersen, Simon Calmar

    2014-01-01

    of management is less effective in public organizations. A difference-in-differences model based on survey data on management in Danish public and private schools, combined with administrative data of students’ test scores, confirms the hypothesis. The results have important implications for the transfer......Recent theoretical developments suggest that management actions have different impacts on outcomes in public and private organizations. This proposition is important to public organizations’ widespread import of private sector management tools such as performance management. This article examines...... how performance management influences performance outcomes in otherwise similar public and private organizations. Showing that the factors expected to diminish the impact of performance management parallel the organizational characteristics of public organizations, we hypothesize that this type...

  7. Advanced Risk Analysis for High-Performing Organizations

    National Research Council Canada - National Science Library

    Alberts, Christopher; Dorofee, Audrey

    2006-01-01

    ...) are not readily identified using traditional risk analysis techniques. High-performing organizations have the basic skills needed to identify and manage these new types of risk, but lack sufficient techniques...

  8. Effect of organic mulch materials on maize performance and weed ...

    African Journals Online (AJOL)

    Effect of organic mulch materials on maize performance and weed growth in the derived savanna of south eastern Nigeria. ... Nigeria Agricultural Journal ... The experiment was conducted at the Research and Teaching Farm of the Federal ...

  9. Identification of Employee Performance Appraisal Methods in Agricultural Organizations

    OpenAIRE

    Venclova Katerina; Salkova Andrea; Kolackova Gabriela

    2013-01-01

    A formal employee performance appraisal is regarded as one of the tools of human resources performance management. People, their knowledge and skills are currently considered to be the most valuable resource a company has. The article focuses on methods of employee performance appraisal in agricultural organizations in the Czech Republic. The first part of the article deals with the theoretical background of the term “formal appraisal” and employee performance appraisal methods as defined by ...

  10. Organizations

    DEFF Research Database (Denmark)

    Hatch, Mary Jo

    Most of us recognize that organizations are everywhere. You meet them on every street corner in the form of families and shops, study in them, work for them, buy from them, pay taxes to them. But have you given much thought to where they came from, what they are today, and what they might become...... and considers many more. Mary Jo Hatch introduces the concept of organizations by presenting definitions and ideas drawn from the a variety of subject areas including the physical sciences, economics, sociology, psychology, anthropology, literature, and the visual and performing arts. Drawing on examples from...... prehistory and everyday life, from the animal kingdom as well as from business, government, and other formal organizations, Hatch provides a lively and thought provoking introduction to the process of organization....

  11. Market performance of organic food brands in Denmark

    DEFF Research Database (Denmark)

    Chrysochou, Polymeros; Vasilev, Boyan

    products. Such information would be useful since some researchers argue that one way to grow the organic market is by making (existing) consumers more loyal to organic food brands (Wier et al, 2008). This is true if we accept the argument that organic food brands are small and therefore behave as niche...... brands showing excess repeat purchase behaviour given their market share. However, niche brands rarely exist (Sharp, 2010), and other factors, such as lack of availability and competition from conventional brands, may lead organic food brands to show higher switching rates. If this holds true, then what...... has led to this growth? In this study we aimed at exploring what has contributed to the growth of organic food market and whether organic food brands perform better than conventional brands. To do so, we used panel data provided by GfK in Denmark and analysed 9 product categories across a series of 10...

  12. Assessment of pilot workload - Converging measures from performance based, subjective and psychophysiological techniques

    Science.gov (United States)

    Kramer, Arthur F.; Sirevaag, Erik J.; Braune, Rolf

    1986-01-01

    This study explores the relationship between the P300 component of the event-related brain potential (ERP) and the processing demands of a complex real-world task. Seven male volunteers enrolled in an Instrument Flight Rule (IFR) aviation course flew a series of missions in a single engine fixed-based simulator. In dual task conditions subjects were also required to discriminate between two tones differing in frequency. ERPs time-locked to the tones, subjective effort ratings and overt performance measures were collected during two 45 min flights differing in difficulty (manipulated by varying both atmospheric conditions and instrument reliability). The more difficult flight was associated with poorer performance, increased subjective effort ratings, and smaller secondary task P300s. Within each flight, P300 amplitude was negatively correlated with deviations from command headings indicating that P300 amplitude was a sensitive workload metric both between and within the flight missions.

  13. Motor performance during and following acute alcohol intoxication in healthy non-alcoholic subjects

    DEFF Research Database (Denmark)

    Poulsen, Mette Buch; Jakobsen, Johannes Klitgaard; Andersen, Henning

    2007-01-01

    Chronic alcohol abuse has adverse effects on skeletal muscle, and reduced muscle strength is frequently seen in chronic alcoholics. In this study the acute effects of moderate alcohol intoxication on motor performance was evaluated in 19 non-alcoholic healthy subjects (10 women, 9 men). A randomi...... of moderate alcohol intoxication (1,4 g/l) does not impair motor performance, and no accelerated exercise-induced muscle damage is seen. Udgivelsesdato: 2007-Nov...

  14. Student Performance on the NBME Part II Subtest and Subject Examination in Obstetrics-Gynecology.

    Science.gov (United States)

    Metheny, William P.; Holzman, Gerald B.

    1988-01-01

    Comparison of the scores of 342 third-year medical students on the National Board of Medical Examiners subject examination and the Part II subtest on obstetrics-gynecology found significantly better performance on the former, suggesting a need to interpret the scores differently. (Author/MSE)

  15. Multimodal decoding and congruent sensory information enhance reaching performance in subjects with cervical spinal cord injury

    Directory of Open Access Journals (Sweden)

    Elaine Anna Corbett

    2014-05-01

    Full Text Available Cervical spinal cord injury (SCI paralyzes muscles of the hand and arm, making it difficult to perform activities of daily living. Restoring the ability to reach can dramatically improve quality of life for people with cervical SCI. Any reaching system requires a user interface to decode parameters of an intended reach, such as trajectory and target. A challenge in developing such decoders is that often few physiological signals related to the intended reach remain under voluntary control, especially in patients with high cervical injuries. Furthermore, the decoding problem changes when the user is controlling the motion of their limb, as opposed to an external device. The purpose of this study was to investigate the benefits of combining disparate signal sources to control reach in people with a range of impairments, and to consider the effect of two feedback approaches. Subjects with cervical SCI performed robot-assisted reaching, controlling trajectories with either shoulder electromyograms (EMGs or EMGs combined with gaze. We then evaluated how reaching performance was influenced by task-related sensory feedback, testing the EMG-only decoder in two conditions. The first involved moving the arm with the robot, providing congruent sensory feedback through their remaining sense of proprioception. In the second, the subjects moved the robot without the arm attached, as in applications that control external devices. We found that the multimodal decoding algorithm worked well for all subjects, enabling them to perform straight, accurate reaches. The inclusion of gaze information, used to estimate target location, was especially important for the most impaired subjects. In the absence of gaze information, congruent sensory feedback improved performance. These results highlight the importance of proprioceptive feedback, and suggest that multi-modal decoders are likely to be most beneficial for highly impaired subjects and in tasks where such

  16. High Performance Work Practices In Indian Organizations- An Understanding

    OpenAIRE

    Awasthi, Shakti

    2013-01-01

    In todays global competitive era, every business aims to optimize their processes. High performance work practices are such a practice, which can lead to the optimal utilization of human resources. In the present article I have tried to bring into light different aspects related to the high performing work practices in the organizational setup and their implementation can make a difference in the organization. The high performance work practices not only can bring the change in human resource...

  17. PERFORMANCE MANAGEMENT APPROACHES IN ECONOMIC ORGANIZATIONS USING INFORMATION TECHNOLOGY

    Directory of Open Access Journals (Sweden)

    Anca Mehedintu

    2012-03-01

    Full Text Available Performance management includes activities that ensure that goals are consistently being met inan effective and efficient manner. Performance management can focus on the performance of an organization, adepartment, employee, or even the processes to build a product or service, as well as many other areas.In these days of globalization and intensive use of information technology, the organizations must defineand implement an appropriate strategy that would support their medium-term development, stability andcompetitiveness. This is achieved through a coherent and interrelated set of activities for understanding thecustomer expectations and the level at which the offer of organization add value to customers and satisfy theirneeds, define their internal organization to allow timely response to market demands without losing focus on client,tracking strategy and business model for the accomplishment of the organization mission, aligning the existing ITproject management or under development implementation in organization with the strategic management oforganization etc. Strategic Management determines the improvement of processes, effective use of resources, focuson critical areas in terms of finance, creating opportunities for innovation and technological progress, improvementof the supply mechanism and the duty to promote personal interaction and negotiation at all levels, continuousassessment of organization and its technological trends, analyze the market potential and competence field etc.Strategic management system will not give good results if the strategy is not defined by a set of operationalobjectives clearly at all levels.Business performance is based on a set of analytical processes of business, supported by informationtechnology that defines the strategic goals that can be measured by performance indicators. EnterprisePerformance Management creates a powerful and precise environment, characterized by data consistency,efficiency analysis

  18. Improved Automated Perimetry Performance in Elderly Subjects after Listening To Mozart

    Science.gov (United States)

    Marques, Junia Cabral; Vanessa, Adriana Chaves Oliveira; Fiorelli, Macedo Batista; Kasahara, Niro

    2009-01-01

    PURPOSE: To evaluate the performance of automated perimetry of elderly subjects naïve to AP after listening to a Mozart sonata. INTRODUCTION: Automated perimetry (AP) is a psychophysical test used to assess visual fields in patients with neurological disorders and glaucoma. In a previous study, Fiorelli et al. showed that young subjects who listened to a Mozart sonata prior to undergoing AP performed better in terms of reliability than those who did not listen to the sonata. METHODS: Fifty-two AP-naïve, normal subjects underwent Automated perimetry (SITA 24-2). The study group (25 subjects) underwent AP after listening to Mozart’s Sonata for Two Pianos in D Major, and the control group (27 subjects) underwent Automated perimetry without prior exposure to the music. RESULTS: The study group had significantly lower false negative rates and a lower visual field reliability score than the controls (P=0.04 and P=0.04, respectively). The test time was shorter for the study group (P=0.03). DISCUSSION: This study shows that elderly subjects, when exposed to the Mozart sonata immediately before AP testing, have lower false negative rates and lower visual field reliability scores when compared with an age- and gender-matched control group. Our results differ from those of Fiorelli et al. who found lower false positive rates and less fixation loss in addition to lower false negative rates. CONCLUSION: Listening to a Mozart sonata seems to improve automated perimetry reliability in elderly subjects. PMID:19606243

  19. Monocular and binocular reading performance in subjects with normal binocular vision.

    Science.gov (United States)

    Johansson, Jan; Pansell, Tony; Ygge, Jan; Seimyr, Gustaf Öqvist

    2014-07-01

    It is well known that problems with binocular vision can cause issues for reading; less known is to what extent binocular vision improves reading performance. The purpose of this study was to explore the role of binocularity by directly comparing monocular and binocular reading in subjects with typical reading skills and normal binocular vision. A secondary purpose was to assess any asymmetry in monocular performance and its association with the sighting dominant eye. In a balanced repeated measures experiment, 18 subjects read paragraphs of text under monocular and binocular conditions. All subjects went through an optometric examination before inclusion. Reading speed and eye movements were recorded with an eye tracker. The mean difference in reading speed (2.1 per cent) between monocular (dominant and non-dominant eye averaged) and binocular reading speed was not significant. A significant difference in reading speed was found between binocular and the non-dominant eye, as determined by the far sighting test (p = 0.03). Monocular reading showed significantly increased (8.9 per cent) fixation duration (p binocular vision, there is no marked enhancement in reading performance by binocular vision when reading paragraphs of text. Furthermore, the monocular reading performance appears to be close to equal and any small differences in performance appear not to be strongly associated with ocular dominance. © 2014 The Authors. Clinical and Experimental Optometry © 2014 Optometrists Association Australia.

  20. Precompetitive state anxiety, objective and subjective performance, and causal attributions in competitive swimmers.

    Science.gov (United States)

    Polman, Remco; Rowcliffe, Naomi; Borkoles, Erika; Levy, Andrew

    2007-02-01

    This study investigated the nature of the relationship between precompetitive state anxiety (CSAI-2C), subjective (race position) and objective (satisfaction) performance outcomes, and self-rated causal attributions (CDS-IIC) for performance in competitive child swimmers. Race position, subjective satisfaction, self-confidence, and, to a lesser extent, cognitive state anxiety (but not somatic state anxiety) were associated with the attributions provided by the children for their swimming performance. The study partially supported the self-serving bias hypothesis; winners used the ego-enhancing attributional strategy, but the losers did not use an ego-protecting attributional style. Age but not gender appeared to influence the attributions provided in achievement situations.

  1. Single subject analyses reveal consistent recruitment of frontal operculum in performance monitoring.

    Science.gov (United States)

    Amiez, Céline; Wutte, Magdalena G; Faillenot, Isabelle; Petrides, Michael; Burle, Boris; Procyk, Emmanuel

    2016-06-01

    There are continuing uncertainties regarding whether performance monitoring recruits the anterior insula (aI) and/or the frontal operculum (fO). The proximity and morphological complexity of these two regions make proper identification and isolation of the loci of activation extremely difficult. The use of group averaging methods in human neuroimaging might contribute to this problem. The result has been heterogeneous labeling of this region as aI, fO, or aI/fO, and a discussion of results oriented towards either cognitive or interoceptive functions depending on labeling. In the present article, we adapted the spatial preprocessing of functional magnetic resonance imaging data to account for group averaging artifacts and performed a subject-by-subject analysis in three performance monitoring tasks. Results show that functional activity related to feedback or action monitoring consistently follows local morphology in this region and demonstrate that the activity is located predominantly in the fO rather than in the aI. From these results, we propose that a full understanding of the respective role of aI and fO would benefit from increased spatial resolution and subject-by-subject analysis. Copyright © 2016 Elsevier Inc. All rights reserved.

  2. Key Performance Characteristics of Organic Shrimp Aquaculture in Southwest Bangladesh

    Directory of Open Access Journals (Sweden)

    Christian Reinhard Vogl

    2012-05-01

    Full Text Available In Bangladesh, black tiger shrimp (Penaeus monodon; Fabricius, 1798 aquaculture has come to be one of the most important sectors in both the rural and national economies. Likewise, organic shrimp aquaculture has emerged as an alternative farming enterprise for farmers especially in the southwestern districts of Bangladesh. The present study aims to show key performance characteristics of organic shrimp farmers and farming in a prototypical shrimp farming area in Bangladesh. Data was collected in 2009 from organic shrimp farmers in the Kaligonj and Shyamnagar sub-districts through questionnaire interviews, transect walks and focus group discussions. The mean productivity of organic shrimp farming in the area is 320 kg ha−1 yr−1 (ranging from 120 to 711 kg ha−1year−1. Organic farmers are more likely to have a higher monthly income and less aquaculture experience. Moreover, suitable landholdings and classified labor distribution have been found to play an important role in the development of organic shrimp aquaculture. The most common assets of organic shrimp aquaculture are high yield, low production cost, available post larvae and high market prices. Small business farmers are likely to earn more income benefits from organic shrimp aquaculture than their larger-scale counterparts. Finally, the paper suggests that more research is needed to stimulate the success of organic shrimp aquaculture.

  3. Subjective Evaluation of Packet Service Performance in UMTS and Heterogeneous Networks

    DEFF Research Database (Denmark)

    Teyeb, Oumer Mohammed; Sørensen, Troels Bundgaard; Mogensen, Preben

    2006-01-01

    Quality of Service (QoS) in mobile telecommunication systems is usually identified by some basic performance metrics such as delay, throughput and jitter. However, the main impact of service quality is on the end user, and as such a detailed study of service performance should involve the end user....... In this paper, such an approach is taken where subjective performance evaluation is undertaken for web browsing and video streaming services in Universal Mobile Telecommunication System (UMTS) and a heterogeneous network comprised of UMTS and Wireless LAN (WLAN). Using a real-time network emulation testbed...

  4. Performance effects and subjective disturbance of speech in acoustically different office types--a laboratory experiment.

    Science.gov (United States)

    Haka, M; Haapakangas, A; Keränen, J; Hakala, J; Keskinen, E; Hongisto, V

    2009-12-01

    This study examined how the intelligibility of irrelevant speech, determined with the Speech Transmission Index (STI), affects demanding cognitive task performance. Experiment was carried out in a laboratory that resembled an open-plan office. Three speech conditions were tested corresponding to a private office (STI = 0.10), an acoustically excellent open office (STI = 0.35) and an acoustically poor open office (STI = 0.65). All conditions were presented at equal level, 48 dBA. The STI was adjusted by the relative levels of speech and masking sound. Thirty-seven students participated in the experiment that lasted for 4 h. All participants performed five tasks in each of the three speech conditions. Questionnaires were used to assess subjective perceptions of the speech conditions. Performance in the operation span task, the serial recall and the activation of prior knowledge from long-term memory were deteriorated in the speech condition with the highest speech intelligibility (STI = 0.65) in comparison with the other two conditions (STI = 0.10 and STI = 0.35). Unlike performance measures, questionnaire results showed consistent differences among all three speech conditions, i.e. subjective disturbance increased with ascending speech intelligibility. Thus, subjective comfort was disturbed more easily than performance. The results support the use of STI as an essential room acoustic design measure in open-plan offices. Reduction of speech intelligibility in office environments by proper acoustic design would be beneficial in terms of both work performance and subjective comfort. Proper acoustic design requires both the use of high acoustic absorption and an appropriate masking sound.

  5. Evaluation of Subjective and Objective Performance Metrics for Haptically Controlled Robotic Systems

    Directory of Open Access Journals (Sweden)

    Cong Dung Pham

    2014-07-01

    Full Text Available This paper studies in detail how different evaluation methods perform when it comes to describing the performance of haptically controlled mobile manipulators. Particularly, we investigate how well subjective metrics perform compared to objective metrics. To find the best metrics to describe the performance of a control scheme is challenging when human operators are involved; how the user perceives the performance of the controller does not necessarily correspond to the directly measurable metrics normally used in controller evaluation. It is therefore important to study whether there is any correspondence between how the user perceives the performance of a controller, and how it performs in terms of directly measurable metrics such as the time used to perform a task, number of errors, accuracy, and so on. To perform these tests we choose a system that consists of a mobile manipulator that is controlled by an operator through a haptic device. This is a good system for studying different performance metrics as the performance can be determined by subjective metrics based on feedback from the users, and also as objective and directly measurable metrics. The system consists of a robotic arm which provides for interaction and manipulation, which is mounted on a mobile base which extends the workspace of the arm. The operator thus needs to perform both interaction and locomotion using a single haptic device. While the position of the on-board camera is determined by the base motion, the principal control objective is the motion of the manipulator arm. This calls for intelligent control allocation between the base and the manipulator arm in order to obtain intuitive control of both the camera and the arm. We implement three different approaches to the control allocation problem, i.e., whether the vehicle or manipulator arm actuation is applied to generate the desired motion. The performance of the different control schemes is evaluated, and our

  6. PERFORMANCE IN ORGANIZATIONS IN A HUMAN RESOURCE PERSPECTIVE

    Directory of Open Access Journals (Sweden)

    LOGOFĂTU MONICA

    2017-08-01

    Full Text Available In turbulent financial and economic present conditions a major challenge for the general management of organizations and in particular for the strategic human resources management is to establish a clear, coherent and consistent framework in terms of measuring organizational performance and economic efficiency. This paper aims to conduct an exploratory research of literature concerning measuring organizational performance. Based on the results of research the paper proposes a multi-dimensional model for measuring organizational performance providing a mechanism that will allow quantification of performance based on selected criteria. The model will attempt to eliminate inconsistencies and incongruities of organizational effectiveness models developed by specialists from organization theory area, performance measurement models developed by specialists from accounting management area and models of measuring the efficiency and effectiveness developed by specialists from strategic management and entrepreneurship areas.

  7. MEASURING PERFORMANCE IN ORGANIZATIONS FROM MULTI-DIMENSIONAL PERSPECTIVE

    Directory of Open Access Journals (Sweden)

    ȘTEFĂNESCU CRISTIAN

    2017-08-01

    Full Text Available In turbulent financial and economic present conditions a major challenge for the general management of organizations and in particular for the strategic human resources management is to establish a clear, coherent and consistent framework in terms of measuring organizational performance and economic efficiency. This paper aims to conduct an exploratory research of literature concerning measuring organizational performance. Based on the results of research the paper proposes a multi-dimensional model for measuring organizational performance providing a mechanism that will allow quantification of performance based on selected criteria. The model will attempt to eliminate inconsistencies and incongruities of organizational effectiveness models developed by specialists from organization theory area, performance measurement models developed by specialists from accounting management area and models of measuring the efficiency and effectiveness developed by specialists from strategic management and entrepreneurship areas.

  8. The Impact of Knowledge Management, Learning Organization, and Educations Organization on Organization Performance: A Case in Brawijaya University

    OpenAIRE

    Giuma Omar Al Ahmar; Ainur Rofiq; Djumilah Zain Hadiwodjojo

    2015-01-01

    This study aims to investigate the impact of knowledge management, learning organization, and education organization on organization performance at University of Brawijaya. The Quantitative   method was applied to conduct this study. A questionnaire of four dimensions with 41 items was distributed to the sample target of 140 administrative employees at University of Brawijaya. Structural Equation modeling was used to analyze the data. The results show that there are positive relationships bet...

  9. Performance Management in Healthcare Organizations: Concept and Practicum.

    Science.gov (United States)

    Dimitropoulos, Panagiotis E

    2017-01-01

    Organizational performance can create and sustain competitive advantages for corporations and even improve their sustainability and future prospects. Health care organizations present a sector where performance management is structured by multiple dimensions. The scope of this study is to analyze the issue of performance management in healthcare organizations and specifically the implementation of the Balanced Scorecard (BSC) methodology on organizations providing health services. The study provides a discussion on the BSC development process, the steps that management has to take in order to prepare the implementation of the BSC and finally discusses a practical example of a scorecard with specific strategic goals and performance indicators. Managers of healthcare organizations and specifically those providing services to the elderly and the general population could use the propositions of the study as a roadmap for processing, analyzing, evaluating and implementing the balanced scorecard approach in their organizations' daily operations. BSC methodology can give an advantage in terms of enhanced stakeholder management and preservation within a highly volatile and competitive economic environment.

  10. Music performance anxiety in skilled pianists: effects of social-evaluative performance situation on subjective, autonomic, and electromyographic reactions.

    Science.gov (United States)

    Yoshie, Michiko; Kudo, Kazutoshi; Murakoshi, Takayuki; Ohtsuki, Tatsuyuki

    2009-11-01

    Music performance anxiety (MPA), or stage fright in music performance, is a serious problem for many musicians, because performance impairment accompanied by MPA can threaten their career. The present study sought to clarify on how a social-evaluative performance situation affects subjective, autonomic, and motor stress responses in pianists. Measurements of subjective state anxiety, heart rate (HR), sweat rate (SR), and electromyographic (EMG) activity of upper extremity muscles were obtained while 18 skilled pianists performed a solo piano piece(s) of their choice under stressful (competition) and non-stressful (rehearsal) conditions. Participants reported greater anxiety in the competition condition, which confirmed the effectiveness of stress manipulation. The HR and SR considerably increased from the rehearsal to competition condition reflecting the activation of sympathetic division of the autonomic nervous system. Furthermore, participants showed higher levels of the EMG magnitude of proximal muscles (biceps brachii and upper trapezius) and the co-contraction of antagonistic muscles in the forearm (extensor digitorum communis and flexor digitorum superficialis) in the competition condition. Although these responses can be interpreted as integral components of an adaptive biological system that creates a state of motor readiness in an unstable or unpredictable environment, they can adversely influence pianists by disrupting their fine motor control on stage and by increasing the risk of playing-related musculoskeletal disorders.

  11. Performance analysis of organic Rankine cycles using different working fluids

    Directory of Open Access Journals (Sweden)

    Zhu Qidi

    2015-01-01

    Full Text Available Low-grade heat from renewable or waste energy sources can be effectively recovered to generate power by an organic Rankine cycle (ORC in which the working fluid has an important impact on its performance. The thermodynamic processes of ORCs using different types of organic fluids were analyzed in this paper. The relationships between the ORC’s performance parameters (including evaporation pressure, condensing pressure, outlet temperature of hot fluid, net power, thermal efficiency, exergy efficiency, total cycle irreversible loss, and total heat-recovery efficiency and the critical temperatures of organic fluids were established based on the property of the hot fluid through the evaporator in a specific working condition, and then were verified at varied evaporation temperatures and inlet temperatures of the hot fluid. Here we find that the performance parameters vary monotonically with the critical temperatures of organic fluids. The values of the performance parameters of the ORC using wet fluids are distributed more dispersedly with the critical temperatures, compared with those of using dry/isentropic fluids. The inlet temperature of the hot fluid affects the relative distribution of the exergy efficiency, whereas the evaporation temperature only has an impact on the performance parameters using wet fluid.

  12. Effect of a Bluetooth-implemented hearing aid on speech recognition performance: subjective and objective measurement.

    Science.gov (United States)

    Kim, Min-Beom; Chung, Won-Ho; Choi, Jeesun; Hong, Sung Hwa; Cho, Yang-Sun; Park, Gyuseok; Lee, Sangmin

    2014-06-01

    The object was to evaluate speech perception improvement through Bluetooth-implemented hearing aids in hearing-impaired adults. Thirty subjects with bilateral symmetric moderate sensorineural hearing loss participated in this study. A Bluetooth-implemented hearing aid was fitted unilaterally in all study subjects. Objective speech recognition score and subjective satisfaction were measured with a Bluetooth-implemented hearing aid to replace the acoustic connection from either a cellular phone or a loudspeaker system. In each system, participants were assigned to 4 conditions: wireless speech signal transmission into hearing aid (wireless mode) in quiet or noisy environment and conventional speech signal transmission using external microphone of hearing aid (conventional mode) in quiet or noisy environment. Also, participants completed questionnaires to investigate subjective satisfaction. Both cellular phone and loudspeaker system situation, participants showed improvements in sentence and word recognition scores with wireless mode compared to conventional mode in both quiet and noise conditions (P Bluetooth-implemented hearing aids helped to improve subjective and objective speech recognition performances in quiet and noisy environments during the use of electronic audio devices.

  13. Three-Dimensional Modeling of the Pelvic Floor Support Systems of Subjects with and without Pelvic Organ Prolapse

    Science.gov (United States)

    Xie, Bing; Wang, Jianliu

    2015-01-01

    The purpose of this study was to develop three-dimensional finite element models of the whole pelvic support systems of subjects with and without pelvic organ prolapse (POP) that can be used to simulate anterior and posterior wall prolapses. Magnetic resonance imaging was performed in one healthy female volunteer (55 years old, para 2) and one patient (56 years old, para 1) with anterior vaginal wall prolapse. Contours of the pelvic structures were traced by a trained gynecologist. Smoothing of the models was conducted and attachments among structures were established. Finite element models of the pelvic support system with anatomic details were established for both the healthy subject and the POP patient. The models include the uterus, vagina with cavity, cardinal and uterosacral ligaments, levator ani muscle, rectum, bladder, perineal body, pelvis, obturator internus, and coccygeal muscle. Major improvements were provided in the modeling of the supporting ligaments and the vagina with high anatomic precision. These anatomically accurate models can be expected to allow study of the mechanism of POP in more realistic physiological conditions. The resulting knowledge may provide theoretical help for clinical prevention and treatment of POP. PMID:25710033

  14. Three-Dimensional Modeling of the Pelvic Floor Support Systems of Subjects with and without Pelvic Organ Prolapse

    Directory of Open Access Journals (Sweden)

    Shuang Ren

    2015-01-01

    Full Text Available The purpose of this study was to develop three-dimensional finite element models of the whole pelvic support systems of subjects with and without pelvic organ prolapse (POP that can be used to simulate anterior and posterior wall prolapses. Magnetic resonance imaging was performed in one healthy female volunteer (55 years old, para 2 and one patient (56 years old, para 1 with anterior vaginal wall prolapse. Contours of the pelvic structures were traced by a trained gynecologist. Smoothing of the models was conducted and attachments among structures were established. Finite element models of the pelvic support system with anatomic details were established for both the healthy subject and the POP patient. The models include the uterus, vagina with cavity, cardinal and uterosacral ligaments, levator ani muscle, rectum, bladder, perineal body, pelvis, obturator internus, and coccygeal muscle. Major improvements were provided in the modeling of the supporting ligaments and the vagina with high anatomic precision. These anatomically accurate models can be expected to allow study of the mechanism of POP in more realistic physiological conditions. The resulting knowledge may provide theoretical help for clinical prevention and treatment of POP.

  15. Research and Development on Automatic Information Organization and Subject Analysis in Recent Decades

    Directory of Open Access Journals (Sweden)

    Yuen-Hsien Tseng

    2014-10-01

    Full Text Available Information organization and subject analysis (IOSA is an important issue in the field of library and information science(LIS.As the fast advance in information technology, more and more digital documents are emerging in a pace such that automated IOSA become inevitable. This article firstly introduces the development of related automatic techniques in recent decades and promotes a tranditional viewpoint based on the workflow of:(1 data collection and aggregation, (2 cataloguing, (3 regulation, (4 archving, and (5 usage,to regulate the whole process when applying automated techniques to any IOSA task.Some application examples are then described to let the readers have a feel of the feasibility of these techniques; specifically the applications of keyword extraction, association analysis, document clustering, and topic categorization are mentioned.We conclude that the related techniques and applications are still developing in a quick pace such that only a few percentages of them can be mentioned.This article is intended to promote the mutual cooperation among the LIS and other fields.

  16. The efficacy of objective and subjective predictors of driving performance during sleep restriction and circadian misalignment.

    Science.gov (United States)

    Kosmadopoulos, Anastasi; Sargent, Charli; Zhou, Xuan; Darwent, David; Matthews, Raymond W; Dawson, Drew; Roach, Gregory D

    2017-02-01

    Fatigue is a significant contributor to motor-vehicle accidents and fatalities. Shift workers are particularly susceptible to fatigue-related risks as they are often sleep-restricted and required to commute around the clock. Simple assays of performance could provide useful indications of risk in fatigue management, but their effectiveness may be influenced by changes in their sensitivity to sleep loss across the day. The aim of this study was to evaluate the sensitivity of several neurobehavioral and subjective tasks to sleep restriction (SR) at different circadian phases and their efficacy as predictors of performance during a simulated driving task. Thirty-two volunteers (M±SD; 22.8±2.9 years) were time-isolated for 13-days and participated in one of two 14-h forced desynchrony protocols with sleep opportunities equivalent to 8h/24h (control) or 4h/24h (SR). At regular intervals during wake periods, participants completed a simulated driving task, several neurobehavioral tasks, including the psychomotor vigilance task (PVT), and subjective ratings, including a self-assessment measure of ability to perform. Scores transformed into standardized units relative to baseline were folded into circadian phase bins based on core body temperature. Sleep dose and circadian phase effect sizes were derived via mixed models analyses. Predictors of driving were identified with regressions. Performance was most sensitive to sleep restriction around the circadian nadir. The effects of sleep restriction around the circadian nadir were larger for simulated driving and neurobehavioral tasks than for subjective ratings. Tasks did not significantly predict driving performance during the control condition or around the acrophase during the SR condition. The PVT and self-assessed ability were the best predictors of simulated driving across circadian phases during SR. These results show that simple performance measures and self-monitoring explain a large proportion of the variance in

  17. PERFORMANCE IN ORGANIZATIONS IN A HUMAN RESOURCE PERSPECTIVE

    OpenAIRE

    LOGOFĂTU MONICA; ȘTEFĂNESCU CRISTIAN

    2017-01-01

    In turbulent financial and economic present conditions a major challenge for the general management of organizations and in particular for the strategic human resources management is to establish a clear, coherent and consistent framework in terms of measuring organizational performance and economic efficiency. This paper aims to conduct an exploratory research of literature concerning measuring organizational performance. Based on the results of research the paper proposes a mult...

  18. MEASURING PERFORMANCE IN ORGANIZATIONS FROM MULTI-DIMENSIONAL PERSPECTIVE

    OpenAIRE

    ȘTEFĂNESCU CRISTIAN; LOGOFĂTU MONICA

    2017-01-01

    In turbulent financial and economic present conditions a major challenge for the general management of organizations and in particular for the strategic human resources management is to establish a clear, coherent and consistent framework in terms of measuring organizational performance and economic efficiency. This paper aims to conduct an exploratory research of literature concerning measuring organizational performance. Based on the results of research the paper proposes a mult...

  19. Effect of tone-based sound stimulation on balance performance of normal subjects: preliminary investigation.

    Science.gov (United States)

    Pagnacco, Guido; Klotzek, Adam S; Carrick, Frederick R; Wright, Cameron H G; Oggero, Elena

    2015-01-01

    Sound is known to affect the human brain, hence sound or music therapy is sometimes used to improve a subject's physicaland mental health. In this study, the effects sound stimulation has on balance were investigated by means of computerizeddynamic posturography tests performed with eyes closed on an unstable surface using a CAPS® system, exceeding theInternational Society for Posture and Gait Research (ISPGR) recommended metrological performance standards. Subjectswere tested without listening to any music (baseline), listening to “pure music”, and listening to the same music with differenttones embedded into it (one for each key). We found that different subjects react differently to different tones. Music alonedid not have a statistically significant effect on balance compared to the baseline, but the “best” tone significantly improvedbalance compared to the baseline or the “pure music” conditions. Furthermore, the “worst” tone reduced the balancecompared to “pure music”, but the reduction was not statistically significant relative to the baseline. The results thereforeindicate that, at least relative to balance performance, the tone-based sound stimulation we investigated is effective andinherently safe, but that tone selection depends on the individual subject.

  20. The relationship between family orientation, organization context, organization structure and firm performance

    NARCIS (Netherlands)

    Meijaard, J.; Uhlaner, L.M.

    2004-01-01

    This study focuses on the prediction of three firm performance indicators, sales growth, innovation performance and profitability, on a sample of small and medium-sized firms in the Netherlands. Predictions from agency theory and the resource based view of organizations lead to alternate hypotheses

  1. The Role of Performance Management in Creating and Maintaining a High-Performance Organization

    NARCIS (Netherlands)

    Waal, A.A. de; Heijden, B.I.J.M. van der

    2015-01-01

    There is still a good deal of confusion in the literature about how the use of a performance management system affects overall organizational performance. Some researchers find that performance management enhances both the financial and non-financial results of an organization, while others do not

  2. Effects of Background Music on Objective and Subjective Performance Measures in an Auditory BCI.

    Science.gov (United States)

    Zhou, Sijie; Allison, Brendan Z; Kübler, Andrea; Cichocki, Andrzej; Wang, Xingyu; Jin, Jing

    2016-01-01

    Several studies have explored brain computer interface (BCI) systems based on auditory stimuli, which could help patients with visual impairments. Usability and user satisfaction are important considerations in any BCI. Although background music can influence emotion and performance in other task environments, and many users may wish to listen to music while using a BCI, auditory, and other BCIs are typically studied without background music. Some work has explored the possibility of using polyphonic music in auditory BCI systems. However, this approach requires users with good musical skills, and has not been explored in online experiments. Our hypothesis was that an auditory BCI with background music would be preferred by subjects over a similar BCI without background music, without any difference in BCI performance. We introduce a simple paradigm (which does not require musical skill) using percussion instrument sound stimuli and background music, and evaluated it in both offline and online experiments. The result showed that subjects preferred the auditory BCI with background music. Different performance measures did not reveal any significant performance effect when comparing background music vs. no background. Since the addition of background music does not impair BCI performance but is preferred by users, auditory (and perhaps other) BCIs should consider including it. Our study also indicates that auditory BCIs can be effective even if the auditory channel is simultaneously otherwise engaged.

  3. Effects of background music on objective and subjective performance measures in an auditory BCI

    Directory of Open Access Journals (Sweden)

    Sijie Zhou

    2016-10-01

    Full Text Available Several studies have explored brain computer interface (BCI systems based on auditory stimuli, which could help patients with visual impairments. Usability and user satisfaction are important considerations in any BCI. Although background music can influence emotion and performance in other task environments, and many users may wish to listen to music while using a BCI, auditory and other BCIs are typically studied without background music. Some work has explored the possibility of using polyphonic music in auditory BCI systems. However, this approach requires users with good musical skills, and has not been explored in online experiments. Our hypothesis was that an auditory BCI with background music would be preferred by subjects over a similar BCI without background music, without any difference in BCI performance. We introduce a simple paradigm (which does not require musical skill using percussion instrument sound stimuli and background music, and evaluated it in both offline and online experiments. The result showed that subjects preferred the auditory BCI with background music. Different performance measures did not reveal any significant performance effect when comparing background music vs. no background. Since the addition of background music does not impair BCI performance but is preferred by users, auditory (and perhaps other BCIs should consider including it. Our study also indicates that auditory BCIs can be effective even if the auditory channel is simultaneously otherwise engaged.

  4. Concentration dynamics and biodegradability of dissolved organic matter in wetland soils subjected to experimental warming.

    Science.gov (United States)

    Wang, Hang; Holden, Joseph; Zhang, Zhijian; Li, Meng; Li, Xia

    2014-02-01

    Dissolved organic matter (DOM) is the most bioavailable soil organic pool. Understanding how DOM responds to elevated temperature is important for forecasting soil carbon (C) dynamics under climate warming. Here a 4.5-year field microcosm experiment was carried out to examine temporal DOM concentration dynamics in soil pore-water from six different subtropical wetlands. Results are compared between control (ambient temperature) and warmed (+5°C) treatments. UV-visible and fluorescence spectroscopy was performed to reveal DOM structural complexity at the end of the warming incubation. Elevated temperature resulted in initially (1 to 2.5 years) high pore-water DOM concentrations in warmed samples. These effects gradually diminished over longer time periods. Of the spectral indices, specific UV absorbance at 280 nm and humification index were significantly higher, while the signal intensity ratio of the fulvic-like to humic-like fluorescence peak was lower in warmed samples, compared to the control. Fluorescence regional integration analysis further suggested that warming enhanced the contribution of humic-like substances to DOM composition for all tested wetlands. These spectral fingerprints implied a declined fraction of readily available substrates in DOM allocated to microbial utilization in response to 4.5 years of warming. As a negative feedback, decreased DOM biodegradability may have the potential to counteract initial DOM increases and alleviate C loss in water-saturated wetland soils. © 2013.

  5. Learning Organization and Transfer: Strategies for Improving Performance

    Science.gov (United States)

    Weldy, Teresa G.

    2009-01-01

    Purpose: This study aims to explore a relationship between the learning organization and transfer of training as strategies for learning and managing knowledge to make performance improvements and gain or maintain a competitive advantage. Design/methodology/approach: Various similarities are identified in the literature that are indicative of a…

  6. Organic acids for performance enhancement in pig diets

    NARCIS (Netherlands)

    Partanen, K.H.; Mroz, Z.

    1999-01-01

    Organic acids and their salts appear to be potential alternatives to prophylactic in-feed antibiotics and growth promoters in order to improve the performance of weaned piglets, fattening pigs and reproductive sows, although their growth-promoting effects are generally less than that of antibiotics.

  7. Performance, organ growth and economics of finisher broiler fed ...

    African Journals Online (AJOL)

    A 28-day feeding trial was conducted to evaluate the effects of dietary inclusion of neem (Azadirachta indica) leaf meal on the performance, organ growth and economics of finishing broilers. The harvested neem leaves were chopped and air dried under room temperature for ten days until they became crispy while retaining ...

  8. Impact Of Staff Morale On Performance In School Organizations ...

    African Journals Online (AJOL)

    The relationship between the morale of staff (i.e. teachers' morale) and performance in school organizations was looked at in this study. The research was carried out on a randomly selected sample of one hundred and twenty (120) students and teaching staff from the three colleges in Covenant University, Ota, Ogun State.

  9. the performance of maize crop during acid amelioration with organic ...

    African Journals Online (AJOL)

    Mgina

    amelioration compared to senescent cowpea and wild spikenard, which had lower alkalinity. The performance of maize grown in respective soil incorporated with the organic residues followed the same pattern. The finding suggests different acid ameliorating potential of residues, pigeon peas and cordia being the most ...

  10. Effects of organic acid and probiotic on performance and gut ...

    African Journals Online (AJOL)

    The effects of organic acid, probiotic and a combination of the two on performance and gut morphology in broiler chickens were investigated. Two hundred and forty one-day-old Arbor Acre broiler chicks were randomly assigned to five dietary treatments with six replicates, each with eight birds. The treatments were basal ...

  11. Growth performance, immune status and organ morphometry in ...

    African Journals Online (AJOL)

    The present research aimed to investigate the effects of Bacillus subtilis (B. subtilis) on performance, immune system, gut, and lymphoid organs' microarchitecture in broilers. A total of 120 day-old broiler chicks were randomly distributed into four groups. The birds were fed a corn-soy-based basal diet (BD) (control) or the ...

  12. Preserving Subject Variability in Group fMRI Analysis: Performance Evaluation of GICA versus IVA

    Directory of Open Access Journals (Sweden)

    Andrew eMichael

    2014-06-01

    Full Text Available Independent component analysis (ICA is a widely applied technique to derive functionally connected brain networks from fMRI data. Group ICA (GICA and Independent Vector Analysis (IVA are extensions of ICA that enable users to perform group fMRI analyses; however a full comparison of the performance limits of GICA and IVA has not been investigated. Recent interest in resting state fMRI data with potentially higher degree of subject variability makes the evaluation of the above techniques important. In this paper we compare component estimation accuracies of GICA and an improved version of IVA using simulated fMRI datasets. We systematically change the degree of component spatial variability and evaluate estimation accuracy over all spatial maps (SMs and time courses (TCs of the decomposition. Our results indicate the following: (1 at low levels of SM variability or when just one SM is varied, both GICA and IVA perform well, (2 at higher levels of SM variability or when more than one SMs are varied, IVA continues to perform well but GICA yields SM estimates that are composites of other SMs with errors in TCs, (3 both GICA and IVA remove spatial correlations of overlapping SMs and introduce artificial correlations in their TCs, (4 if number of SMs is over estimated, IVA continues to perform well but GICA introduces artifacts in the varying and extra SMs with artificial correlations in the TCs of extra components, and (5 in the absence or presence of SMs unique to one subject, GICA produces errors in TCs and IVA estimates are accurate. In summary, our simulation experiments (both simplistic and realistic and our holistic analyses approach indicate that IVA produces results that are closer to ground truth and thereby better preserves subject variability. The improved version of IVA is now packaged into the GIFT toolbox (http://mialab.mrn.org/software/gift.

  13. Influence of blend microstructure on bulk heterojunction organic photovoltaic performance.

    Science.gov (United States)

    Brabec, Christoph J; Heeney, Martin; McCulloch, Iain; Nelson, Jenny

    2011-03-01

    The performance of organic photovoltaic devices based upon bulk heterojunction blends of donor and acceptor materials has been shown to be highly dependent on the thin film microstructure. In this tutorial review, we discuss the factors responsible for influencing blend microstructure and how these affect device performance. In particular we discuss how various molecular design approaches can affect the thin film morphology of both the donor and acceptor components, as well as their blend microstructure. We further examine the influence of polymer molecular weight and blend composition upon device performance, and discuss how a variety of processing techniques can be used to control the blend microstructure, leading to improvements in solar cell efficiencies.

  14. Assessing the Sustainability Performance of Organic Farms in Denmark

    Directory of Open Access Journals (Sweden)

    Evelien M. de Olde

    2016-09-01

    Full Text Available The growth of organic agriculture in Denmark raises the interest of both producers and consumers in the sustainability performance of organic production. The aim of this study was to examine the sustainability performance of farms in four agricultural sectors (vegetable, dairy, pig and poultry using the sustainability assessment tool RISE 2.0. Thirty seven organic farms were assessed on 10 themes, including 51 subthemes. For one theme (water use and 17 subthemes, a difference between sectors was found. Using the thresholds of RISE, the vegetable, dairy and pig sector performed positively for seven themes and the poultry sector for eight themes. The performance on the nutrient flows and energy and climate themes, however, was critical for all sectors. Moreover, the performance on the economic viability theme was critical for vegetable, dairy and pig farms. The development of a tool, including decisions, such as the selection of themes and indicators, reference values, weights and aggregation methods, influences the assessment results. This emphasizes the need for transparency and reflection on decisions made in sustainability assessment tools. The results of RISE present a starting point to discuss sustainability at the farm-level and contribute to an increase in awareness and learning about sustainability.

  15. Changing Metrics of Organ Procurement Organization Performance in Order to Increase Organ Donation Rates in the United States.

    Science.gov (United States)

    Goldberg, D; Kallan, M J; Fu, L; Ciccarone, M; Ramirez, J; Rosenberg, P; Arnold, J; Segal, G; Moritsugu, K P; Nathan, H; Hasz, R; Abt, P L

    2017-12-01

    The shortage of deceased-donor organs is compounded by donation metrics that fail to account for the total pool of possible donors, leading to ambiguous donor statistics. We sought to assess potential metrics of organ procurement organizations (OPOs) utilizing data from the Nationwide Inpatient Sample (NIS) from 2009-2012 and State Inpatient Databases (SIDs) from 2008-2014. A possible donor was defined as a ventilated inpatient death ≤75 years of age, without multi-organ system failure, sepsis, or cancer, whose cause of death was consistent with organ donation. These estimates were compared to patient-level data from chart review from two large OPOs. Among 2,907,658 inpatient deaths from 2009-2012, 96,028 (3.3%) were a "possible deceased-organ donor." The two proposed metrics of OPO performance were: (1) donation percentage (percentage of possible deceased-donors who become actual donors; range: 20.0-57.0%); and (2) organs transplanted per possible donor (range: 0.52-1.74). These metrics allow for comparisons of OPO performance and geographic-level donation rates, and identify areas in greatest need of interventions to improve donation rates. We demonstrate that administrative data can be used to identify possible deceased donors in the US and could be a data source for CMS to implement new OPO performance metrics in a standardized fashion. © 2017 The American Society of Transplantation and the American Society of Transplant Surgeons.

  16. Performance of non-profit organizations: Empirical contrasts between privately and publicly funded Croatian humanitarian organizations

    Directory of Open Access Journals (Sweden)

    Alfirević Nikša

    2014-01-01

    Full Text Available In this paper we contrast different aspects of non-profit organizations’ performance from the perspective of their funding sources. Based on previous empirical results indicating that sources of funding influence fundraising performance, we extend the existing research to the analysis of overall non-profit organizational performance. We use the social constructivist approach to non-profit performance to discuss contrasts between privately and publicly funded humanitarian organizations in Croatia. Some differences in growth- and development-oriented measures of nonprofit performance for these groups are identified and discussed in the context of future regional research.

  17. Tracking Systems for Virtual Rehabilitation: Objective Performance vs. Subjective Experience. A Practical Scenario

    Directory of Open Access Journals (Sweden)

    Roberto Lloréns

    2015-03-01

    Full Text Available Motion tracking systems are commonly used in virtual reality-based interventions to detect movements in the real world and transfer them to the virtual environment. There are different tracking solutions based on different physical principles, which mainly define their performance parameters. However, special requirements have to be considered for rehabilitation purposes. This paper studies and compares the accuracy and jitter of three tracking solutions (optical, electromagnetic, and skeleton tracking in a practical scenario and analyzes the subjective perceptions of 19 healthy subjects, 22 stroke survivors, and 14 physical therapists. The optical tracking system provided the best accuracy (1.074 ± 0.417 cm while the electromagnetic device provided the most inaccurate results (11.027 ± 2.364 cm. However, this tracking solution provided the best jitter values (0.324 ± 0.093 cm, in contrast to the skeleton tracking, which had the worst results (1.522 ± 0.858 cm. Healthy individuals and professionals preferred the skeleton tracking solution rather than the optical and electromagnetic solution (in that order. Individuals with stroke chose the optical solution over the other options. Our results show that subjective perceptions and preferences are far from being constant among different populations, thus suggesting that these considerations, together with the performance parameters, should be also taken into account when designing a rehabilitation system.

  18. Intra-Subject Variability of 5 Km Time Trial Performance Completed by Competitive Trained Runners

    Directory of Open Access Journals (Sweden)

    Fisher James

    2017-06-01

    Full Text Available Time-trials represent an ecologically valid approach to assessment of endurance performance. Such information is useful in the application of testing protocols and estimation of sample sizes required for research/magnitude based inference methods. The present study aimed to investigate the intra-subject variability of 5 km time-trial running performance in trained runners. Six competitive trained male runners (age = 33.8 ± 10.1 years; stature = 1.78 ± 0.01 m; body mass = 69.0 ± 10.4 kg, V. $\\it V^{.}$ O2max = 62.6 ± 11.0 ml·kg·min-1 completed an incremental exercise test to volitional exhaustion followed by 5 x 5 km time-trials (including a familiarisation trial, individually spaced by 48 hours. The time taken to complete each trial, heart rate, rating of perceived exertion and speed were all assessed. Intra-subject absolute standard error of measurement and the coefficient of variance were calculated for time-trial variables in addition to the intra-class correlation coefficient for time taken to complete the time-trial. For the primary measure time, results showed a coefficient of variation score across all participants of 1.5 ± 0.59% with an intra-class correlation coefficient score of 0.990. Heart rate, rating of perceived exertion and speed data showed a variance range between 0.8 and 3.05%. It was concluded that when compared with related research, there was observed low intra-subject variability in trained runners over a 5 km distance. This supports the use of this protocol for 5 km time-trial performance for assessment of nutritional strategies, ergogenic aids or training interventions on endurance running performance.

  19. The effects of glycine on subjective daytime performance in partially sleep-restricted healthy volunteers

    Directory of Open Access Journals (Sweden)

    Makoto eBannai

    2012-04-01

    Full Text Available Approximately 30% of the general population suffers from insomnia. Given that insomnia causes many problems, amelioration of the symptoms is crucial. Recently, we found that a nonessential amino acid, glycine subjectively and objectively improves sleep quality in humans who have difficulty sleeping. We evaluated the effects of glycine on daytime sleepiness, fatigue and performances in sleep-restricted healthy subjects. Sleep was restricted to 25% less than the usual sleep time for three consecutive nights. Before bedtime, 3 g of glycine or placebo were ingested, sleepiness and fatigue were evaluated using the visual analogue scale (VAS and a questionnaire, and performance were estimated by personal computer (PC performance test program on the following day. In subjects given glycine, the VAS data showed a significant reduction in fatigue and a tendency toward reduced sleepiness. These observations were also found via the questionnaire, indicating that glycine improves daytime sleepiness and fatigue induced by acute sleep restriction. PC performance test revealed significant improvement in psychomotor vigilance test. We also measured plasma melatonin and the expression of circadian-modulated genes expression in the rat suprachiasmatic nucleus (SCN to evaluate the effects of glycine on circadian rhythms. Glycine did not show significant effects on plasma melatonin concentrations during either the dark or light period. Moreover, the expression levels of clock genes such as Bmal1 and Per2 remained unchanged. However, we observed a glycine-induced increase in the neuropeptides arginine vasopressin and vasoactive intestinal polypeptide in the light period. Although no alterations in the circadian clock itself were observed, our results indicate that glycine modulated SCN function. Thus, glycine modulates certain neuropeptides in the SCN and this phenomenon may indirectly contribute to improving the occasional sleepiness and fatigue induced by sleep

  20. The Role of Performance Management in Creating and Maintaining a High-Performance Organization

    OpenAIRE

    Waal, A.A. de; Heijden, B.I.J.M. van der

    2015-01-01

    There is still a good deal of confusion in the literature about how the use of a performance management system affects overall organizational performance. Some researchers find that performance management enhances both the financial and non-financial results of an organization, while others do not find any positive effects or, at most, ambiguous effects. An important step toward getting more clarity in this relationship is to investigate the role performance management plays in creating and m...

  1. Reliability and validity of videotaped functional performance tests in ACL-injured subjects

    DEFF Research Database (Denmark)

    von Porat, Anette; Holmström, Eva; Roos, Ewa

    2008-01-01

    during five functional tests in subjects with an anterior cruciate ligament (ACL) injury. METHOD: Twelve ACL-injured men, mean age 40 years, were video filmed before and after 12 weeks of knee-specific training when performing five different functional tests: walking, knee bending, step activity......, crossover hop on one leg and one-leg hop. The videos were observed by four physiotherapists, and the knee movement pattern quality, a feature of the loading strategy of the lower extremity, was scored on an 11-point rating scale. To assess the criterion validity, the observational rating was correlated...... validity found indicate that the knee movement pattern quality in ACL-injured subjects can be determined by visual observation of more demanding functional tests such as crossover hop on one leg and one-leg hop for distance....

  2. Pilot study of light therapy and neurocognitive performance of attention and memory in healthy subjects.

    Science.gov (United States)

    Bersani, Giuseppe; Marconi, Daniela; Limpido, Lucilla; Tarolla, Emanuele; Caroti, Eleonora

    2008-02-01

    The aim of this pilot study was to investigate whether light therapy improves healthy subjects' neurocognitive performance of attention, memory, and language. Ten subjects were treated with white bright light for 5 days and a control group of 10 with no treatment were assessed with a battery of neurocognitive tests which included the Stroop Colour Word Interference Test, the Verbal Fluency Test, the Story Recall Test, and the Word Pairs Recall Test. Analysis showed improvements in cognitive scores in both groups, although on all the cognitive tests the mean difference scores between baseline and endpoint were significantly larger in the light-treated group. These preliminary results suggest that short-term bright light may exert beneficial effects on cognitive functions.

  3. A Comparative Study of the Empirical Relationship in Student Performance between Physics and Other STEM Subjects

    Science.gov (United States)

    Guerra, Maricela

    The Next Generation Science Standards (NGSS) advocated by the National Research Council emphasize the connections among Science, Technology, Engineering, and Mathematics (STEM) disciplines. By design, NGSS is expected to replace the previous science education standards to enhance the quality of STEM education across the nation. To support this initiative, this investigation was conducted to fill a void in the research literature by developing an empirical indicator for the relationship of student performance across STEM subjects using a large-scale database from the Trends in Mathematics and Science Study (TIMSS). In particular, an innovative approach has been taken in this study to support the canonical correlation analysis of student plausible scores between physics and other STEM subjects at different grade levels and in a cross-country context. Results from this doctoral research revealed the need to strengthen the alignment between the intended, implemented, and attained curricula to support the integration of STEM disciplines in the United States.

  4. Performance effect of multiple control forms in a Lean organization

    DEFF Research Database (Denmark)

    Kristensen, Thomas Borup; Israelsen, Poul

    2012-01-01

    Over the last decades Lean has developed into a prominent management philosophy reaching beyond shop floor tools. However, substantial support of performance effects from Lean is still scarce and at best with mixed results. Recently, research has turned its focus towards perceiving Lean...... as a control package. In this paper we present statistical support for enhanced performance coming from Lean. Furthermore, our results strongly support the perception of Lean as a set of multiple control forms (output, behavioral, and social controls) that complement each other. Therefore, performance...... is increased if the average level of control forms is increased, and performance is further increased if the control forms are balanced at the same level representing a complementary effect between them. Our data are archival data spanning multiple years in a strong Lean organization. The dependent performance...

  5. Alpine skiing and anaerobic performance in solid organ transplant recipients.

    Science.gov (United States)

    Roi, G S; Mosconi, G; Capelli, I; Cuna, V; Persici, E; Parigino, M; Pisoni, D; Todeschini, P; Costa, A Nanni; Stefoni, S

    2010-05-01

    Limited information has been published about sporting activities in solid organ transplant recipients. The aim of this study was to assess "in the field" performance capacities of a group of transplant recipients involved in an alpine skiing competition. We studied 16 transplant recipients (13 men and 3 women) who had undergone transplantations (11 kidney, 4 liver, and 1 heart) at 89 +/- 68 months prior while participating in an alpine skiing race. The patients performed a countermovement jumping test to measure the explosive power of the lower limbs. In all patients blood lactate concentrations (La) were measured at the end of a giant slalom race. The maximum displacement of the center of mass during the jumping test was 22.4 +/- 9.3 cm; the time to complete the giant slalom was 75.5 +/- 16.5 seconds and La was 3.5 +/- 0.8 mmol/L. We observed significant linear relationships between race time and La (R(2) = 0.4733; P < .01) and between race time and performance in the jumping test (R(2) = 0.3655; P < .05). This study indicated that recovery of anaerobic and technical sporting activities is possible in organ transplant recipients. Muscular power and anaerobic performances among a selected group of solid organ transplant recipients were similar to those of the general untrained population. Copyright (c) 2010 Elsevier Inc. All rights reserved.

  6. Using a standardized donor ratio to assess the performance of organ procurement organizations.

    Science.gov (United States)

    Stogis, Sheryl; Hirth, Richard A; Strawderman, Robert L; Banaszak-Holl, Jane; Smith, Dean G

    2002-10-01

    To develop a Standardized Donor Ratio (SDR) as an outcome measure for evaluating the effectiveness of organ procurement organizations (OPOs). All deaths by cause in the United States during 1993-1994 as reported in the Vital Mortality Statistics, Multiple Cause of Death files. The OPO-specific data were provided by the United Network for Organ Sharing (UNOS). Each OPO's expected number of donors was calculated by applying national donation rates to deaths with potential for donation in 24 age, sex, and race cells. The SDR was calculated by dividing the observed number of donors by the expected number. The chi2 tests of the hypothesis that the OPO's performance differed from the national norm of 1.0 were performed. The SDR was compared to the existing performance standard based on the unadjusted number of donors per million live population in the OPO's service area. An ordinary least squares (OLS) regression assessed predictors of the SDR. The SDRs ranged from 0.41 to 1.99. Twenty-nine of 64 OPOs had SDRs significantly different than 1.0. The SDRs were positively associated with the percent of white living population and the number of organ types transplanted per transplant center served by the OPO. The SDRs can be used by Centers for Medicare and Medicaid Services (CMS), UNOS, and OPOs to target quality improvement initiatives, present more accurate comparisons of OPO performance, and develop public policy on the evaluation of the effectiveness of organ procurement efforts.

  7. School-performance indicators and subjective health complaints: are there gender differences?

    Science.gov (United States)

    Brolin Låftman, Sara; Modin, Bitte

    2012-05-01

    Although boys and girls are generally located in the same physical school environment, it may be experienced differently by, and have varying implications for, boys and girls. Girls like school more and achieve higher school marks, but they also perceive more school-related pressure. Based on a total sample of 8456 ninth grade pupils in Stockholm in 2004, this study uses multilevel linear regression to analyse differences between boys and girls with regard to a number of school-performance indicators (demands, motivation, teacher support and school marks) and their association with subjective health complaints. Results showed that girls perceive more demands, show greater academic motivation, perform better in school and report more emotional support from teachers than boys. In contrast, instrumental and appraisal support from teachers are more commonly reported by boys. Associations between school-performance indicators and subjective health complaints were slightly stronger for girls than for boys. Contextual variation in health complaints, especially between classes, was found only for girls. High achievement motivation and emotional teacher support in the school class was associated with better pupil health, suggesting that a positive climate in terms of motivation and support favours class health as a whole. © 2011 The Authors. Sociology of Health & Illness © 2011 Foundation for the Sociology of Health & Illness/Blackwell Publishing Ltd.

  8. Performance Testing of Lidar Components Subjected to Space Exposure in Space via MISSE 7 Mission

    Science.gov (United States)

    Prasad, Narasimha S.

    2012-01-01

    .The objective of the Materials International Space Station Experiment (MISSE) is to study the performance of novel materials when subjected to the synergistic effects of the harsh space environment for several months. MISSE missions provide an opportunity for developing space qualifiable materials. Several laser and lidar components were sent by NASA Langley Research Center (LaRC) as a part of the MISSE 7 mission. The MISSE 7 module was transported to the international space station (ISS) via STS 129 mission that was launched on Nov 16, 2009. Later, the MISSE 7 module was brought back to the earth via the STS 134 that landed on June 1, 2011. The MISSE 7 module that was subjected to exposure in space environment for more than one and a half year included fiber laser, solid-state laser gain materials, detectors, and semiconductor laser diode. Performance testing of these components is now progressing. In this paper, the current progress on post-flight performance testing of a high-speed photodetector and a balanced receiver is discussed. Preliminary findings show that detector characteristics did not undergo any significant degradation.

  9. Effects of habitual variations in napping on psychomotor performance, memory and subjective states.

    Science.gov (United States)

    Taub, J M

    1979-01-01

    Effects of habitual variations in napping on psychomotor performance, short-term memory and subjective states were investigated. The subjects were 32 healthy male university students who napped twice or more weekly in themorning and at night. Sixteen were randomly assigned to a control group and 16 to a nap(treatment) group. The experiment comprised two conditions of electrographically (EEG) recorded sleep for the nap group and two EEG monitored conditions of wakefulness for the controls. These conditions were scheduled from 9:35 to 11:35 a.m. and 12 hr later between 9:35 p.m. and 11:35 p.m. Measurements were obtained from: (a) a continuous 10-min auditory reaction time task, (b) a free recall task of short-term memory, (c) an activation-mood adjective check list, and (d) the Stanford Sleepiness scale. Except for memory the dependent variables of waking function were assessed 20 min before and 20 min after all conditions. Following each sleep condition the nap group as opposed to the controls showed a statistically significant improvement in reaction time performance, higher short-term retention, less reported sleepiness and elevated subjective states reflected by fice factors on the adjective mood-activation check list. Among the correlations computed the largest significant coefficients were of stage 4 and REM with posttreatment Stanford Sleepiness ratings. After naps, increased postdormital sleepiness was correlated with stage 4 and decreased sleepiness with REM sleep. Although few strikingly divergent functional effects were associated with morning and nocturanal naps, these did covary with sleep psychophysiology. It is postulated that the phase, the EEG-sleep stages and possibly the duration of accustomed naps are less salient factors influencing performance when the time since awakening until behavioral assessment can be kept constant.

  10. Subjective experiences of occupational performance of activities of daily living in patients with mild stroke

    DEFF Research Database (Denmark)

    Kristensen, Hanne Kaae; Postat, Annemette; Poulsen, Trine

    2014-01-01

    and risk of accidents. Conclusion: It is important to view the patients with mild stroke as heterogeneous, and consider post-stroke fatigue and emotional reactions when evaluating rehabilitation needs. Therefore, it is important to look further into structured tools, which examine how well the participant......Aim: To investigate the subjective experiences of occupational performance of activities of daily living (ADL) in patients with mild stroke. Methodology: Data was generated from January – December 2011 and consisted of 41 individual ADL-I interviews with patients in hospital and another 41...

  11. Measuring business performance using indicators of ecologically sustainable organizations

    Science.gov (United States)

    Snow, Charles G., Jr.; Snow, Charles C.

    2001-02-01

    The purpose of this paper is to explore the use of ecology-based performance measures as a way of augmenting the Balanced Scorecard approach to organizational performance measurement. The Balanced Scorecard, as proposed by Kaplan and Norton, focuses on four primary dimensions; financial, internal-business-process, customer, and learning and growth perspectives. Recently, many 'green' organizational theorists have developed the concept of "Ecologically Sustainable Organizations" or ESOs, a concept rooted in open systems theory. The ESO is called upon to consider resource use and conservation as a strategy for long-term viability. This paper asserts that in order to achieve ESO status, an organization must not only measure but also reward resource conservation measures. Only by adding a fifth perspective for ecological dimensions will the entity be truly motivated toward ESO status.

  12. CHAPTER 3. High-performance Organic Photovoltaic Donor Polymers

    KAUST Repository

    Wadsworth, Andrew

    2017-11-08

    The field of organic photovoltaics has advanced a great deal over the last decade, with device efficiencies now exceeding 11%. A large part of this success can be attributed to the development of donor polymer materials, from their humble beginnings as homopolymers to the highly tuned push-pull copolymer and terpolymer materials that are now being reported on a regular basis. Through the careful use of chemical modification, it has been possible to design and synthesize a wide variety of donor polymers, allowing optimization of both the optoelectronic and structural properties of the materials. In doing so, more favourable active layer blends have been achieved and therefore significant improvements in device performance have been observed. Herein we discuss how the chemical design of donor polymers for organic photovoltaics has led to the emergence of high-performance materials.

  13. Growth performance, carcass and organ characteristics of growing ...

    African Journals Online (AJOL)

    Growth performance, carcass and organ characteristics of growing rabbits fed graded levels of Moringa oleifera leaf meal in diets. ... Similarly, the weight of liver (40.35-57.05g), lungs (10.22-11.24g), heart (2.95-4.10g), kidney (8.30-10.70g), kidney fat (11.10-12.65g), small intestine (81.25-99.80g), large intestine ...

  14. Thermal effect on the morphology and performance of organic photovoltaics.

    Science.gov (United States)

    Kawashima, Eisuke; Fujii, Mikiya; Yamashita, Koichi

    2016-09-29

    The morphology of organic photovoltaics (OPVs) is a significant factor in improving performance, and establishing a method for controlling morphology is necessary. In this study, we propose a device-size simulation model, combining reptation and the dynamic Monte Carlo (DMC) algorithm, to investigate the relationship between the manufacturing process, morphology, and OPV performance. The reptation reproduces morphologies under thermal annealing, and DMC showed morphology-dependence of performance: not only short-circuit current density but also open-circuit voltage had optimal interfacial areas due to competition between exciton dissociation and charge collection. Besides, we performed transient absorption spectroscopy of various BHJ morphologies under realistic conditions, which revealed prompt and delayed dynamics of charge generation-the majority of the charges were from excitons that were generated on interfaces and dissociated within a few picoseconds, and the others from excitons that migrated to interfaces and dissociated on the order of sub-nanoseconds.

  15. Effects of Sleep Hygiene Education on Subjective Sleep Quality and Academic Performance

    Directory of Open Access Journals (Sweden)

    Erkan Sahin

    2014-12-01

    Full Text Available Aim: Sleep problems are common in students with one third of university students reporting insufficient sleep. It is known that sleep quality and daytime sleepiness cause decrasing academic performans. For this reason we aimed to investigate the effects of a sleep hygiene education on sleep quality and academic performance of first year medical students. Material and Method: Self-reported sleep data and academic performance of 131 first grade medical students were collected. To all students enrolled Pittsburg Sleep Quality Scale in the assessment of sleep quality and Epworth Sleepiness Scale for assessment of daytime sleepiness in the evaluation.The students were divided into two subgroups and the intervention group received a 30 minute structured sleep hygiene education. Global academic performance was assessed by grade point average at the end of the year. Results: Mean Pittsburgh sleep quality index score of the students was 7.9±3.5 and 106 (82.8% of then had a score %u22655.After intervention, .the worse the initial sleep quality, the more improvement by the sleep hygiene education on sleep quality and academic performance. Discussion: An education on sleep hygiene might improve subjective sleep quality and academic performance of medical students.

  16. Alternative computer mouse designs: performance, posture, and subjective evaluations for college students aged 18-25.

    Science.gov (United States)

    Feathers, David J; Rollings, Kimberly; Hedge, Alan

    2013-01-01

    Students are faced with work demands requiring intense computer use throughout the week, often with cumulative hourly use per day exceeding that of adult workers. Extended daily computer use has been associated with a reported increase of musculoskeletal symptoms for college-aged students. New mouse designs offer alternative movement and postural strategies to potentially mitigate musculoskeletal stress for students. This study investigates the use of alternative computer mouse designs by college-aged students (18-25) through a precision task (point-and-click an on-screen target). Wrist movements, hand posture, and associated subjective user data were collected across innovative mouse designs to understand the physical impact and basic usability issues for this population. Twenty-one (21) healthy, right handed students (11 female; 10 male) were enrolled in this study. Five mouse designs were assessed by investigating hand fit, wrist movements, and subjective accounts of ease of use, perceived control, comfort and aesthetics. Human performance was captured for each mouse design in terms of peak velocity, average movement time, and fastest movement direction using an electrogoniometer as participants performed the ISO 9241 multipoint standard Fitts' task using the Generalized Fitts' Law Model Builder software (GFLMB v.1.1C; [1]) within a zero-error setting (point-and-click task). Hand measurements were taken in both standardized anthropometric positions and adapted hand positions on five alternative mouse designs for a total of seven sets of measurements for each participant. Subjective data was collected through a series of questionnaires that were administered before, during, and after the mouse tasks. Results for human performance, distal upper extremity posture (hand/wrist), and subjective data such as overall preference, ease of use, perceived control, and comfort are given for this population. Wrist extension exceeded 30 degrees for over 50% of the total

  17. Objective and subjective visual performance of multifocal contact lenses: pilot study.

    Science.gov (United States)

    Vasudevan, Balamurali; Flores, Michael; Gaib, Sara

    2014-06-01

    The aim of the present study was to compare the objective and subjective visual performance of three different soft multifocal contact lenses. 10 subjects (habitual soft contact lens wearers) between the ages of 40 and 45 years participated in the study. Three different multifocal silicone hydrogel contact lenses (Acuvue Oasys, Air Optix and Biofinity) were fit within the same visit. All the lenses were fit according to the manufacturers' recommendation using the respective fitting guide. Visual performance tests included low and high contrast distance and near visual acuity, contrast sensitivity, range of clear vision and through-focus curve. Objective visual performance tests included measurement of open field accommodative response at different defocus levels and optical aberrations at different viewing distances. Accommodative response was not significantly different between the three types of multifocal contact lenses at each of the accommodative stimulus levels (p>0.05). Accommodative lag increased for higher stimulus levels for all 3 types of contact lenses. Ocular aberrations were not significantly different between these 3 contact lens designs at each of the different viewing distances (p>0.05). In addition, optical aberrations did not significantly differ between different viewing distances for any of these lenses (p>0.05). ANOVA revealed no significant difference in high and low contrast distance visual acuity as well as near visual acuity and contrast sensitivity function between the 3 multifocal contact lenses and spectacles (p>0.05). There was no statistically significant difference in accommodative response, optical aberrations or visual performance between the 3 multifocal contact lenses in early presbyopes. Copyright © 2013 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.

  18. Juventud Sin Futuro : Subjective experiences of Spanish youth: resistance and organization in the context of economic crisis

    NARCIS (Netherlands)

    P. Trejo Mendez (Paulina)

    2014-01-01

    textabstractThis paper looks at the subjective experiences of Spanish organized youth who are being affected by the economic crisis. This paper follows a standpoint epistemology. This research focuses on how their practices question the current dominant discourse depicting today’s Spanish youth as a

  19. Performance of Purunã beef calves subjected to different weaning systems

    Directory of Open Access Journals (Sweden)

    Fernando Kuss

    2014-09-01

    Full Text Available The study was developed at Fazenda Modelo an Experimental Station belonged to the Instituto Agronômico do Paraná - IAPAR, in the city of Ponta Grossa, PR, from June to November 2011. The objective was to evaluate the performance of calves subjected to different weaning systems. 161 calves crossbred Purunã were divided into three groups: calves subjected to early weaning (DP, weaned at an average of 75 days old; calves subjected to controlled nursing system (AC with 75 days of age, exposed to suck only once a day during the duration of the breeding season (85 days and; the control group, calves submitted to the system of conventional weaning (DC, were kept together with cow, without interfering in breastfeeding until the end of the breeding season (85 days. Calves fed the DP had lower mean (P<0.05 average daily gain (0.56 kg during the experimental group compared to the AC and DC (0.95 kg and 0.88 kg, respectively which did not differ (P<0.05. Thus, the DP had calves at the end of the breeding season, 32.36 kg and 26.48 kg unless the AC group (167.44 kg and DC (161.56 kg, respectively. The system controlled breastfeeding does not provid damage on the performance of calves at 150 days of age. Already early weaning at 75 days cause decrease of 19.6% in weight of calves at 150 days of age compared to suckler calves.

  20. Effects of Visual Communication Tool and Separable Status Display on Team Performance and Subjective Workload in Air Battle Management

    National Research Council Canada - National Science Library

    Schwartz, Daniel; Knott, Benjamin A; Galster, Scott M

    2008-01-01

    ... ambient cabin noise while performing several visual and manual tasks. The purpose of this study is to compare team performance and subjective workload on a simulated AWACS scenario, for two conditions of communication...

  1. Using subjective judgement to determine the validity of a tutorial performance evaluation instrument

    Directory of Open Access Journals (Sweden)

    Melanie L. Lack

    2009-04-01

    Full Text Available

    Evaluating students’ learning performance is dependent on assessment criteria from which valid inferences can be made about student learning. An existing 36-item instrument used to evaluate baccalaureate nursing students’ performance in problem-based learning tutorials was presented to experts in nursing for their subjective judgement of item validity. Quantitative analysis of data sets from experts’ judgements was used to construct a valid measurement scale for evaluating students’ tutorial performance. The objectives of the study were to determine the content validity of items in a tutorial performance evaluation (TPE instrument and to determine the construct validity of items through paired comparison of main and sub-items in the instrument. Academic experts (n = 8 from two South African universities were selected by means of purposive, maximum variation sampling. Data were collected in three rounds of the Delphi technique, which incorporated the Subjective Judgement Model for paired comparison of instrument items. Experts’ ratings were captured on a visual analogue scale for each item. Relative item weights were determined using
    paired comparisons. Statistical analysis resulted in ratio scale data, each item being assigned a ratio relative to its weight. It was concluded that quantitative analysis of subjective judgements is useful to determine the construct validity of items through paired comparison of items in a TPE instrument. This article presents the methodological perspectives of subjective judgement to establish instrument validity.

    Opsomming

    Die evaluering van studente se leervermoë is afhanklik van die waardebepalingskriteria waarvan geldige afleidings betreffende die student se leerervaring gemaak kan word. ’n Bestaande instrument met 36 items waarmee baccalaureus-verpleegkundestudente se prestasie in die probleemgebaseerde leertutoriale geëvalueer is, is aan kundiges in

  2. Multisource feedback, human capital, and the financial performance of organizations.

    Science.gov (United States)

    Kim, Kyoung Yong; Atwater, Leanne; Patel, Pankaj C; Smither, James W

    2016-11-01

    We investigated the relationship between organizations' use of multisource feedback (MSF) programs and their financial performance. We proposed a moderated mediation framework in which the employees' ability and knowledge sharing mediate the relationship between MSF and organizational performance and the purpose for which MSF is used moderates the relationship of MSF with employees' ability and knowledge sharing. With a sample of 253 organizations representing 8,879 employees from 2005 to 2007 in South Korea, we found that MSF had a positive effect on organizational financial performance via employees' ability and knowledge sharing. We also found that when MSF was used for dual purpose (both administrative and developmental purposes), the relationship between MSF and knowledge sharing was stronger, and this interaction carried through to organizational financial performance. However, the purpose of MSF did not moderate the relationship between MSF and employees' ability. The theoretical relevance and practical implications of the findings are discussed. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  3. 40 CFR 80.820 - What gasoline is subject to the toxics performance requirements of this subpart?

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false What gasoline is subject to the toxics... PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) REGULATION OF FUELS AND FUEL ADDITIVES Gasoline Toxics Gasoline Toxics Performance Requirements § 80.820 What gasoline is subject to the toxics performance...

  4. Organization of monitoring of health of subjects of the educational process

    OpenAIRE

    Kuptsova Svetlana Anatolyevna

    2015-01-01

    The article is devoted to presenting the organization of monitoring somatic health and social and psychological health of all participants of the educational process. Monitoring is defined as the central part in the development of scientific fundamentals of psychology and pedagogy of education. Organization of the health monitoring system is presented. It can be implemented through using the laboratory of health psychology.

  5. Bioinspired phospholipid polymer biomaterials for making high performance artificial organs

    Directory of Open Access Journals (Sweden)

    K Ishihara

    2000-01-01

    Full Text Available Novel polymer biomaterials, which can be used in contact with blood, are prepared with strong inspiration from the surface structure of biomembrane. That is, the polymers with a phospholipid polar group in the side chain, 2-methacrylooyloxyethyl phosphorylcholine (MPC polymers were synthesized. The MPC polymers can inhibit surface-induced clot formation effectively, when they are in contact with blood even in the absence of an anticoagulant. This phenomenon was due to the reduction of plasma protein and suppression of denaturation of adsorbed proteins, that is the MPC polymers interact with blood components very mildly. As the molecular structure of the MPC polymer was easily designed by changing the monomer units and their composition, it could be applied to surface modification of artificial organs and biomedical devices for improving blood and tissue compatibility. Thus, the MPC polymers are useful polymer biomaterials for manufacturing high performance artificial organs and biomedical devices to provide safe medical treatments.

  6. Evaluating the subject-performed task effect in healthy older adults: relationship with neuropsychological tests

    Directory of Open Access Journals (Sweden)

    Ana Rita Silva

    2015-04-01

    Full Text Available Background: An enhancement in recall of simple instructions is found when actions are performed in comparison to when they are verbally presented – the subject-performed task (SPT effect. This enhancement has also been found with older adults. However, the reason why older adults, known to present a deficit in episodic memory, have a better performance for this type of information remains unclear. In this article, we explored this effect by comparing the performance on the SPT task with the performance on other tasks, in order to understand the underlying mechanisms that may explain this effect. Objective: We hypothesized that both young and older adult groups should show higher recall in SPT compared with the verbal learning condition, and that the differences between age groups should be lower in the SPT condition. We aimed to explore the correlations between these tasks and known neuropsychological tests, and we also measured source memory for the encoding condition. Design: A mixed design was used with 30 healthy older adults, comparing their performance with 30 healthy younger adults. Each participant was asked to perform 16 simple instructions (SPT condition and to only read the other 16 instructions (Verbal condition – VT. The test phase included a free recall task. Participants were also tested with a set of neuropsychological measures (speed of processing, working memory and verbal episodic memory. Results: The SPT effect was found for both age groups; but even for SPT materials, group differences in recall persisted. Source memory was found to be preserved for the two groups. Simple correlations suggested differences in correlates of SPT performance between the two groups. However, when controlling for age, the SPT and VT tasks correlate with each other, and a measure of episodic memory correlated moderately with both SPT and VT performance. Conclusions: A strong effect of SPT was observed for all but one, which still displayed the

  7. Occupational performance in daily life activities of subjects hospitalized because of chronic malnutrition

    Directory of Open Access Journals (Sweden)

    Lauren Machado Pinto

    2013-08-01

    Full Text Available : Introduction: Malnutrition is configured as a health condition that causes deficits in occupational performance. Objective: To establish a correlation between nutritional status and occupational performance in activities of daily life (ADLs according to the desnutrition state level. Methodology: A descriptive, exploratory, cross-sectional evaluation of 50 patients diagnosed with chronic malnutrition admitted to a University Hospital in Curitiba, Parana state. We used the Functional Independence Measure (FIM and a semi-structured questionnaire in which the subjects named the three main performance limiting reasons. The Kruskal-Wallis test was used to identify the existence of differences between at least two groups in the analysis, while the test of Multiple Comparisons was used to determine which pairs of groups showed statistically significant differences at 95% significance level (p ≤ 0.05. Results: We assessed 28 (56% female and 22 (44% male patients with mean age of 50.16 (±16.74 for one year. Out of these, 19 (38% presented mild chronic malnutrition, 16 (32% showed moderate chronic malnutrition, and 14 (28% presented severe chronic malnutrition. We identified changes particularly in activities evaluated in the use of motor FIM, with relevant alterations of dependence level for the states of moderate to severe malnutrition. Patients’ complaints were in agreement with those pointed by the literature as symptoms of malnutrition. Conclusion: This study confirms the correlation between deterioration in nutritional status and high dependence level upon ADLs.

  8. Effort provides its own reward: endeavors reinforce subjective expectation and evaluation of task performance.

    Science.gov (United States)

    Wang, Lei; Zheng, Jiehui; Meng, Liang

    2017-04-01

    Although many studies have investigated the relationship between the amount of effort invested in a certain task and one's attitude towards the subsequent reward, whether exerted effort would impact one's expectation and evaluation of performance feedback itself still remains to be examined. In the present study, two types of calculation tasks that varied in the required effort were adopted, and we resorted to electroencephalography to probe the temporal dynamics of how exerted effort would affect one's anticipation and evaluation of performance feedback. In the high-effort condition, a more salient stimulus-preceding negativity was detected during the anticipation stage, which was accompanied with a more salient FRN/P300 complex (a more positive P300 and a less negative feedback-related negativity) in response to positive outcomes in the evaluation stage. These results suggested that when more effort was invested, an enhanced anticipatory attention would be paid toward one's task performance feedback and that positive outcomes would be subjectively valued to a greater extent.

  9. Performance of Hybrid Steel Fibers Reinforced Concrete Subjected to Air Blast Loading

    Directory of Open Access Journals (Sweden)

    Mohammed Alias Yusof

    2013-01-01

    Full Text Available This paper presents the results of the experimental data and simulation on the performance of hybrid steel fiber reinforced concrete (HSFRC and also normal reinforced concrete (NRC subjected to air blast loading. HSFRC concrete mix consists of a combination of 70% long steel hook end fibre and also 30% of short steel hook end fibre with a volume fraction of 1.5% mix. A total of six concrete panels were subjected to air blast using plastic explosive (PE4 weighing 1 kg each at standoff distance of 0.3 meter. The parameters measured are mode of failure under static and blast loading and also peak overpressure that resulted from detonation using high speed data acquisition system. In addition to this simulation work using AUTODYN was carried out and validated using experimental data. The experimental results indicate that hybrid steel fiber reinforced concrete panel (HSFRC possesses excellent resistance to air blast loading as compared to normal reinforced concrete (NRC panel. The simulation results were also found to be close with experimental data. Therefore the results have been validated using experimental data.

  10. COMT Val158Met modulates subjective responses to intravenous nicotine and cognitive performance in abstinent smokers

    Science.gov (United States)

    Herman, Aryeh I.; Jatlow, Peter I.; Gelernter, Joel; Listman, Jennifer B.; Sofuoglu, Mehmet

    2013-01-01

    The COMT Val158Met polymorphism may be a risk factor for nicotine addiction. This study examined the influence of the COMT Val158Met polymorphism on subjective, physiological, and cognitive effects of intravenous (IV) nicotine use in African American (AAs) (n=56) and European American (EAs) (n=68) smokers. Overnight abstinent smokers received saline followed by 0.5 and 1.0 mg/70 kg doses of nicotine, administered 30 minutes apart. Smokers with Val/Val genotype, compared to Met carriers, had greater negative subjective effects from IV nicotine and had more severe withdrawal severity following overnight abstinence from smoking. Women with Val/Val genotype reported greater difficulty concentrating and irritability than men with Val/Val or Met carrier genotypes. The Val/Val genotype was associated with better performance on the math task and in AA smokers it was associated with greater systolic blood pressure. These results support the rationale of pharmacologically inhibiting COMT to aid with smoking cessation among Val/Val genotype smokers. PMID:23459442

  11. Subjective Preference of Cellists for the Delay Time of a Single Reflection in a Performance

    Science.gov (United States)

    SATO, S.; ANDO, Y.; OTA, S.

    2000-04-01

    To provide knowledge useful in designing the stage enclosure in a concert hall, Nakayama reported the subjective preference of alto-recorder players for sound fields with a single reflection [Acustica54, 217-221 (1984)]. The present study evaluates the subjective preferences, with regard to ease of performance, of five cello soloists for the delay time of a single reflection. The scale values of preference for the delay time of a single reflection were obtained using a paired comparison method, and the results were compared with those for the alto-recorder players and listeners. The scale values of preference for both individuals and for global cellists with regard to the delay time of reflection can be expressed by a single approximate formula, normalizing the delay time by the most-preferred delay time observed for different music motifs. A notable finding is that the most-preferred delay time of a single reflection for each cellist can be calculated from the amplitude of the reflection and the minimum value of the effective duration (τe)minof the running autocorrelation function of the music motifs played by each cellist.

  12. Life events, salivary cortisol, and cognitive performance in nondemented subjects: a population-based study.

    Science.gov (United States)

    Ouanes, Sami; Castelao, Enrique; Gebreab, Sirak; von Gunten, Armin; Preisig, Martin; Popp, Julius

    2017-03-01

    Older people are particularly exposed to stressful events, known to activate the hypothalamus-pituitary-adrenal axis resulting in increased cortisol levels. High cortisol has been associated with deleterious effects on cognition. We hypothesized that stressful life events could increase cortisol secretion leading to cognitive impairment. A cross-sectional analysis was conducted using data from Colaus/PsyColaus, a longitudinal population-based study among Lausanne residents. Salivary cortisol samples were obtained from 796 nondemented subjects aged at least 65. A neuropsychological battery was used to assess cognitive performance and determine the Clinical Dementia Rating Sum of Boxes (CDRSOB). Lifetime life events and their subjective impact were assessed using a validated questionnaire. The total impact of life events was associated neither with cortisol area under the curve (AUC) nor with CDRSOB nor with any cognitive domain performance. The CDRSOB was associated with the cortisol AUC, controlling for age, sex, body mass index, education and depressive symptoms (p = 0.003; B = 0.686 [0.240; 1.333]; r = 0.114). This association between CDRSOB and the cortisol AUC remained significant after controlling for life events total impact (p = 0.040; B = 0.591 [0.027; 1.155]; r = 0.106). These findings do not support the hypothesis that stressful life events increase cortisol secretion leading to cognitive impairment. The association of higher cortisol levels with poorer cognition might be not a mere reflection of stressful events but rather explained by other factors, yet to be elucidated. Copyright © 2016 Elsevier Inc. All rights reserved.

  13. Metformin improves performance in high-intensity exercise, but not anaerobic capacity in healthy male subjects.

    Science.gov (United States)

    Learsi, S K; Bastos-Silva, V J; Lima-Silva, A E; Bertuzzi, R; De Araujo, G G

    2015-10-01

    The aim of this study was to determine the ergogenic effects of metformin in high-intensity exercise, as well as its effects on anaerobic capacity, in healthy and physically active men. Ten subjects (mean (± standard deviation) maximal oxygen uptake (V˙O2max ) 38.6 ± 4.5 mL/kg per min) performed the following tests in a cycle ergometer: (i) an incremental test; (ii) six submaximal constant workload tests at 40%-90% (V˙O2max ); and (iii) two supramaximal tests (110% (V˙O2max ). Metformin (500 mg) or placebo was ingested 60 min before the supramaximal test. There were no significant differences between the placebo and metformin groups in terms of maximum accumulated oxygen deficit (2.8 ± 0.6 vs 3.0 ± 0.8 L, respectively; P = 0.08), lactate concentrations (7.8 ± 2.6 vs 7.5 ± 3.0 mmol/L, respectively; P = 0.75) or O2 consumed in either the last 30 s of exercise (40.4 ± 4.4 vs 39.9 ± 4.0 mL/kg per min, respectively; P = 0.35) or the first 110 s of exercise (29.0 ± 2.5 vs 29.5 ± 3.0 mL/kg per min, respectively; P = 0.42). Time to exhaustion was significantly higher after metformin than placebo ingestion (191 ± 33 vs 167 ± 32 s, respectively; P = 0.001). The fast component of V˙O2 recovery was higher in the metformin than placebo group (12.71 vs 12.18 mL/kg per min, respectively; P = 0.025). Metformin improved performance and anaerobic alactic contribution during high-intensity exercise, but had no effect on overall anaerobic capacity in healthy subjects. © 2015 Wiley Publishing Asia Pty Ltd.

  14. Financial Performance Determinants of Organizations: The Case of Mongolian Companies

    Directory of Open Access Journals (Sweden)

    Bayaraa Batchimeg

    2017-09-01

    Full Text Available This paper is aimed at examining what ratios can determine financial performance of Mongolian companies which are divided into 6 major sectors to increase their competitiveness. This study analyzes the performance of companies in terms of profitability and its association with multiple determinants for 100 Mongolian joint stock companies (JSC listed in Mongolian Stock Exchange (MSE. Financial statements of those companies from MSE are evaluated by panel regression covering the period of 2012-2015. Return on Assets (ROA, Return on Equity (ROE, and Return on Sales (ROS are chosen as performance indicators, while growth in sales, growth in profit, growth in assets, earnings per share, gross profit margin, cost to revenue ratio, return on costs, short-term debt to assets ratio, current assets to total assets ratio, long-term debt to total assets, quick ratio, current ratio, and cash ratio are used as explanatory variables. The panel regression results show that ROA has more determinants than ROE and ROS, such as earnings per share, return on costs have positive impacts, while short-term debts to total assets ratio and cost to revenue ratio have negative impacts. Growth in sales, earnings per share and costs to revenue ratio influence positively the financial performance of an organization by ROS, while return on cost has a positive effect on the financial performance measured by return on sale.

  15. The role of religiosity, religious norms, subjective norms, and bodily integrity in signing an organ donor card.

    Science.gov (United States)

    Stephenson, Michael T; Morgan, Susan E; Roberts-Perez, Samaria D; Harrison, Tyler; Afifi, Walid; Long, Shawn D

    2008-09-01

    This article examines the influence of religiosity, religious norms, subjective norms, and bodily integrity (the extent to which people think the body should remain unaltered after death) on intent to donate organs postmortem. A total of 4,426 participants from 6 universities completed surveys for this study. The results indicate that religiosity and religious norms had a nonsignificant effect on willingness to donate. In addition, attitudes toward donation had a weak positive relationship on intent to donate, whereas subjective norms exerted a modest positive relationship on intent to donate. Finally, the results reveal a strong direct and indirect effect of bodily integrity on intent to donate.

  16. Organizing English Learner Instruction in New Immigrant Destinations: District Infrastructure and Subject-Specific School Practice

    Science.gov (United States)

    Hopkins, Megan; Lowenhaupt, Rebecca; Sweet, Tracy M.

    2015-01-01

    In the context of shifting demographics and standards-based reform, school districts in new immigrant destinations are charged with designing infrastructures that support teaching and learning for English learners (ELs) in core academic subjects. This article uses qualitative data and social network analysis to examine how one district in the…

  17. Understanding organic photovoltaic cells: Electrode, nanostructure, reliability, and performance

    Science.gov (United States)

    Kim, Myung-Su

    My Ph.D. research has focused on alternative renewable energy using organic semiconductors. During my study, first, I have established reliable characterization methods of organic photovoltaic devices. More specifically, less than 5% variation of power conversion efficiency of fabricated organic blend photovoltaic cells (OBPC) was achieved after optimization. The reproducibility of organic photovoltaic cell performance is one of the essential issues that must be clarified before beginning serious investigations of the application of creative and challenging ideas. Second, the relationships between fill factor (FF) and process variables have been demonstrated with series and shunt resistance, and this provided a chance to understand the electrical device behavior. In the blend layer, series resistance (Rs) and shunt resistance (Rsh) were varied by controlling the morphology of the blend layer, the regioregularity of the conjugated polymer, and the thickness of the blend layer. At the interface between the cathode including PEDOT:PSS and the blend layer, cathode conductivity was controlled by varying the structure of the cathode or adding an additive. Third, we thoroughly examined possible characterization mistakes in OPVC. One significant characterization mistake is observed when the crossbar electrode geometry of OPVC using PEDOT:PSS was fabricated and characterized with illumination which is larger than the actual device area. The hypothesis to explain this overestimation was excess photo-current generated from the cell region outside the overlapped electrode area, where PEDOT:PSS plays as anode and this was clearly supported with investigations. Finally, I incorporated a creative idea, which enhances the exciton dissociation efficiency by increasing the interface area between donor and acceptor to improve the power conversion efficiency of organic photovoltaic cells. To achieve this, nanoimprint lithography was applied for interface area increase. To clarify the

  18. Objective and subjective assessments of lighting in a hospital setting: implications for health, safety and performance.

    Science.gov (United States)

    Dianat, Iman; Sedghi, Ali; Bagherzade, Javad; Jafarabadi, Mohammad Asghari; Stedmon, Alex W

    2013-01-01

    A field study was conducted to evaluate the illumination levels, to examine the effect of lighting conditions (including lighting characteristics and disturbances) on employee satisfaction, job performance, safety and health, and to compare the employees' perception of lighting level with actual illuminance levels in a hospital setting using both questionnaire and physical illuminance measurements. The illumination levels varied across different locations within the hospital and were lower than standards for 52.2% of the workplaces surveyed. Most respondents indicated that at least one of the four lighting characteristics (i.e. light level, type of light sources, light colour and use of daylight) was inappropriate, and that at least one of the three lighting disturbances (i.e. flickering lights, glare and unwanted shadows) was a major disturbance to them. The employees' perceptions of illuminance generally reflected the actual illuminance levels. The more appropriate maintenance or installation of lighting fixtures was rated as the most appropriate for improving lighting. The findings suggest that environmental ergonomics should be given a more prominent role in hospital building and workplace design to support safer healthcare facilities (for staff and potentially for patients). Good lighting is essential to improve employee performance, health and safety. The findings suggest that quantitative physical measurements should be supplemented by qualitative subjective assessments to provide a more holistic approach where specific details about the lighting condition in each working environment are incorporated from the workers' perspective.

  19. Functional asymmetries in early learning during right, left, and bimanual performance in right-handed subjects.

    Science.gov (United States)

    Aznárez-Sanado, Maite; Fernández-Seara, Maria A; Loayza, Francis R; Pastor, Maria A

    2013-03-01

    To elucidate differences in activity and connectivity during early learning due to the performing hand. Twenty right-handed subjects were recruited. The neural correlates of explicit visuospatial learning executed with the right, the left hand, and bimanually were investigated using functional magnetic resonance imaging. Connectivity analyses were carried out using the psychophysiological interactions model, considering right and left anterior putamen as index regions. A common neural network was found for the three tasks during learning. Main activity increases were located in posterior cingulate cortex, supplementary motor area, parietal cortex, anterior putamen, and cerebellum (IV-V), whereas activity decrements were observed in prefrontal regions. However, the left hand task showed a greater recruitment of left hippocampal areas when compared with the other tasks. In addition, enhanced connectivity between the right anterior putamen and motor cortical and cerebellar regions was found for the left hand when compared with the right hand task. An additional recruitment of brain regions and increased striato-cortical and striato-cerebellar functional connections is needed when early learning is performed with the nondominant hand. In addition, access to brain resources during learning may be directed by the dominant hand in the bimanual task. Copyright © 2012 Wiley Periodicals, Inc.

  20. Stability Criterion of Linear Stochastic Systems Subject to Mixed H2/Passivity Performance

    Directory of Open Access Journals (Sweden)

    Cheung-Chieh Ku

    2015-01-01

    Full Text Available The H2 control scheme and passivity theory are applied to investigate the stability criterion of continuous-time linear stochastic system subject to mixed performance. Based on the stochastic differential equation, the stochastic behaviors can be described as multiplicative noise terms. For the considered system, the H2 control scheme is applied to deal with the problem on minimizing output energy. And the asymptotical stability of the system can be guaranteed under desired initial conditions. Besides, the passivity theory is employed to constrain the effect of external disturbance on the system. Moreover, the Itô formula and Lyapunov function are used to derive the sufficient conditions which are converted into linear matrix inequality (LMI form for applying convex optimization algorithm. Via solving the sufficient conditions, the state feedback controller can be established such that the asymptotical stability and mixed performance of the system are achieved in the mean square. Finally, the synchronous generator system is used to verify the effectiveness and applicability of the proposed design method.

  1. Performance Evaluation on Transmission Tower-Line System with Passive Friction Dampers Subjected to Wind Excitations

    Directory of Open Access Journals (Sweden)

    Bo Chen

    2015-01-01

    Full Text Available The vibration control and performance evaluation on a transmission-tower line system by using friction dampers subjected to wind excitations are carried out in this study. The three-dimensional finite element (FE model of a transmission tower is firstly constructed. A two-dimensional lumped mass model of a transmission tower is developed for dynamic analysis. The analytical model of transmission tower-line system is proposed by taking the dynamic interaction between the tower and the transmission lines into consideration. The mechanical model of passive friction damper is presented by involving the effects of damper axial stiffness. The equation of motion of the transmission tower-line system incorporated with the friction dampers disturbed by wind excitations is established. A real transmission tower-line system is taken as an example to examine the feasibility and reliability of the proposed control approach. An extensive parameter study is carried out to find the optimal parameters of friction damper and to assess the effects of slipping force axial stiffness and hysteresis loop on control performance. The work on an example structure indicates that the application of friction dampers with optimal parameters could significantly reduce wind-induced responses of the transmission tower-line system.

  2. 40 CFR Table 11 to Subpart Uuu of... - Requirements for Performance Tests for Organic HAP Emissions From Catalytic Cracking Units Not...

    Science.gov (United States)

    2010-07-01

    ... Organic HAP Emissions From Catalytic Cracking Units Not Subject to New Source Performance Standard (NSPS... Refineries: Catalytic Cracking Units, Catalytic Reforming Units, and Sulfur Recovery Units Pt. 63, Subpt. UUU... From Catalytic Cracking Units Not Subject to New Source Performance Standard (NSPS) for Carbon Monoxide...

  3. Organizing Scientific Data Sets: Studying Similarities and Differences in Metadata and Subject Term Creation

    Science.gov (United States)

    White, Hollie C.

    2012-01-01

    Background: According to Salo (2010), the metadata entered into repositories are "disorganized" and metadata schemes underlying repositories are "arcane". This creates a challenging repository environment in regards to personal information management (PIM) and knowledge organization systems (KOSs). This dissertation research is…

  4. Leadership in Diversity Organizations, and Immigrants' Organizational Commitment and Subjective General Health

    OpenAIRE

    Huynh, Victoria Tran

    2014-01-01

    The purpose of this paper is to examine leadership styles in managing cultural diversity from the LIDO-model at workplaces in Norway, and investigate the relationships between perceived leadership styles with immigrants’ organizational commitment and subjective general health through online survey. The leadership styles from the LIDO-model are diversity leadership, assimilation leadership, separation leadership, and laissez-faire leadership. The relationships were measured by t...

  5. Authenticity and Subjective Wellbeing within the Context of a Religious Organization

    OpenAIRE

    Ariza-Montes, Antonio; Giorgi, Gabriele; Leal-Rodríguez, Antonio; Ramírez-Sobrino, Jesús

    2017-01-01

    Although authenticity has a long history as a philosophical and psychological idea, this concept has received scarce attention in the business literature until very lately. Nevertheless, scholars belonging to a broad array of disciplines have pointed out the escalation in the individuals’ search for authenticity within developed societies. Hence, the purpose of this paper is to assess the link between authenticity and subjective wellbeing within the rarely explored context of faith-driven org...

  6. The role of subjective norms in theory of planned behavior in the context of organic food consumption

    OpenAIRE

    Al-Swidi, Abdullah; Huque, Sheikh Mohammed Rafiul; Hafeez, Muhammad Haroon; Shariff, Mohd Noor Mohd

    2014-01-01

    The purpose of the paper is to investigate the applicability of theory of planned behavior (TPB) with special emphasis on measuring the direct and moderating effect of subjective norms on attitude, perceived behavioral control and buying intention in context of buying organic food. Structured questionnaires were randomly distributed among academic staffs and students of two universities in southern Punjab, Pakistan. Structural equation modeling was employed to test the proposed model fit....

  7. Differences in performance on the functional movement screen between chronic low back pain patients and healthy control subjects

    OpenAIRE

    Ko, Min-Joo; Noh, Kyung-Hee; Kang, Min-Hyeok; Oh, Jae-Seop

    2016-01-01

    [Purpose] Differences in scores on the Functional Movement Screen between patients with chronic lower back pain and healthy control subjects were investigated. [Subjects and Methods] In all, 20 chronic lower back pain patients and 20 healthy control subjects were recruited. Chronic lower back pain patients and healthy controls performed the Functional Movement Screen (deep squat, hurdle step, inline lunge, shoulder mobility, active straight leg raise, trunk stability pushup, and rotary stabil...

  8. The Relationship between Happiness, Subjective Well-Being, Creativity and Job Performance of Primary School Teachers in Ramhormoz City

    Science.gov (United States)

    Jalali, Zohreh; Heidari, Alireza

    2016-01-01

    The research aimed to investigate the relationship between happiness, subjective well-being, creativity and job performance of primary school teachers in Ramhormoz City. Hence, a sample of 330 individuals was selected through random stratified sampling. The research tools included Oxford Happiness Inventory, Subjective Well-being Scale by Keyes…

  9. Directory of Book Trade and Related Organizations. Books Trade Associations, United States and Canada; International and Foreign Book Trade Associations; National Information Standards Organization (NISO) Standards; Calendar, 2003-2012; Acronyms; Index of Organizations; Subject Index.

    Science.gov (United States)

    Bowker Annual Library and Book Trade Almanac, 2003

    2003-01-01

    Includes two lists: one of book trade associations in the United States and Canada, and one of international and foreign book trade associations. Concludes with National Information Standards Organization (NISO) standards; calendar, 2003-2012; acronyms; index of organizations; and subject index. (LRW)

  10. Performance of diffusion absorption refrigeration cycle with organic working fluids

    Energy Technology Data Exchange (ETDEWEB)

    Zohar, A.; Jelinek, M.; Levy, A.; Borde, I. [Pearlstone Center for Aeronautical Engineering Studies, Mechanical Engineering Department, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105 (Israel)

    2009-09-15

    A diffusion absorption refrigeration (DAR) cycle is driven by heat and utilizes a binary solution of refrigerant and absorbent as working fluid, together with an auxiliary inert gas. Commercial DAR systems operate with ammonia-water solution and hydrogen or helium as the inert gas. In this work, the performance of a simplified DAR system working with an organic absorbent (DMAC - dimethylacetamide) and five different refrigerants and helium as inert gas was examined numerically, with the aim of lowering the generator temperature and system pressure along with a non-toxic refrigerant The refrigerants were: chlorodifluoromethane (R22), difluoromethane (R32), 2-chloro-1,1,1,2-tetrafluoroethane (R124), pentafluoroethane (R125) and 1,1,1,2-tetrafluoroethane (R134a). The results were compared with the performance of the same system working with ammonia-water and helium. Similar behavior was found for all systems, regarding the coefficient of performance (COP) and rich and poor solution concentrations as functions of generator temperature. It was found that typical generator temperature with the new substances was 150 C, yet lower COPs, higher evaporator temperatures and lower condensation temperature of about 40 C governed these systems. (author)

  11. Performance limits of plasmon-enhanced organic photovoltaics

    Energy Technology Data Exchange (ETDEWEB)

    Karatay, Durmus U.; Ginger, David S., E-mail: ginger@chem.washington.edu [Department of Physics, University of Washington, Seattle, Washington 98195 (United States); Department of Chemistry, University of Washington, Seattle, Washington 98195 (United States); Salvador, Michael [Department of Chemistry, University of Washington, Seattle, Washington 98195 (United States); Yao, Kai [Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195 (United States); Jen, Alex K.-Y. [Department of Chemistry, University of Washington, Seattle, Washington 98195 (United States); Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195 (United States)

    2014-07-21

    We use a combination of experiment and modeling to explore the promise and limitations of using plasmon-resonant metal nanoparticles to enhance the device performance of organic photovoltaics (OPVs). We focus on optical properties typical of the current generation of low-bandgap donor polymers blended with the fullerene (6,6)-phenyl C{sub 71}-butyric acid methyl ester (PC{sub 71}BM) and use the polymer poly(indacenodithiophene-co-phenanthro[9,10-b]quinoxaline) (PIDT-PhanQ) as our test case. We model the optical properties and performance of these devices both in the presence and absence of a variety of colloidal silver nanoparticles. We show that for these materials, device performance is sensitive to the relative z-position and the density of nanoparticles inside the active layer. Using conservative estimates of the internal quantum efficiency for the PIDT-PhanQ/PC{sub 71}BM blend, we calculate that optimally placed silver nanoparticles could yield an enhancement in short-circuit current density of over 31% when used with ∼ 80-nm-thick active layers, resulting in an absolute increase in power conversion efficiency of up to ∼2% for the device based on optical engineering.

  12. Characterizing “fibrofog”: Subjective appraisal, objective performance, and task-related brain activity during a working memory task

    Directory of Open Access Journals (Sweden)

    Brian Walitt

    2016-01-01

    Full Text Available The subjective experience of cognitive dysfunction (“fibrofog” is common in fibromyalgia. This study investigated the relation between subjective appraisal of cognitive function, objective cognitive task performance, and brain activity during a cognitive task using functional magnetic resonance imaging (fMRI. Sixteen fibromyalgia patients and 13 healthy pain-free controls completed a battery of questionnaires, including the Multiple Ability Self-Report Questionnaire (MASQ, a measure of self-perceived cognitive difficulties. Participants were evaluated for working memory performance using a modified N-back working memory task while undergoing Blood Oxygen Level Dependent (BOLD fMRI measurements. Fibromyalgia patients and controls did not differ in working memory performance. Subjective appraisal of cognitive function was associated with better performance (accuracy on the working memory task in healthy controls but not in fibromyalgia patients. In fibromyalgia patients, increased perceived cognitive difficulty was positively correlated with the severity of their symptoms. BOLD response during the working memory task did not differ between the groups. BOLD response correlated with task accuracy in control subjects but not in fibromyalgia patients. Increased subjective cognitive impairment correlated with decreased BOLD response in both groups but in different anatomic regions. In conclusion, “fibrofog” appears to be better characterized by subjective rather than objective impairment. Neurologic correlates of this subjective experience of impairment might be separate from those involved in the performance of cognitive tasks.

  13. Exploring the state of health and safety management system performance measurement in mining organizations

    Science.gov (United States)

    Haas, Emily Joy; Yorio, Patrick

    2016-01-01

    Complex arguments continue to be articulated regarding the theoretical foundation of health and safety management system (HSMS) performance measurement. The culmination of these efforts has begun to enhance a collective understanding. Despite this enhanced theoretical understanding, however, there are still continuing debates and little consensus. The goal of the current research effort was to empirically explore common methods to HSMS performance measurement in mining organizations. The purpose was to determine if value and insight could be added into the ongoing approaches of the best ways to engage in health and safety performance measurement. Nine site-level health and safety management professionals were provided with 133 practices corresponding to 20 HSMS elements, each fitting into the plan, do, check, act phases common to most HSMS. Participants were asked to supply detailed information as to how they (1) assess the performance of each practice in their organization, or (2) would assess each practice if it were an identified strategic imperative. Qualitative content analysis indicated that the approximately 1200 responses provided could be described and categorized into interventions, organizational performance, and worker performance. A discussion of how these categories relate to existing indicator frameworks is provided. The analysis also revealed divergence in two important measurement issues; (1) quantitative vs qualitative measurement and reporting; and (2) the primary use of objective or subjective metrics. In lieu of these findings we ultimately recommend a balanced measurement and reporting approach within the three metric categories and conclude with suggestions for future research. PMID:26823642

  14. PERFORMANCE OPTIMIZATION OF AN ORGANIC MUD AGITATOR SCREW

    Directory of Open Access Journals (Sweden)

    Mircea Dimitrie CAZACU

    2009-11-01

    Full Text Available Due to the special performances obtained by means of the optimisation method applied to the axial runners of run-of-river hydraulic turbines and of wind turbines, as well as in the case of the screws for boat propulsion, perfected by the first of the authors [1] - [10], in this work one extend the application of this method at the case of an organic mud agitator screw for fermentation and biogas production. One presents the obtaining of the bio liquid circulation minimal velocity in the two possible cases [3]: extracting the fluid velocity from the peripheral force exerted by the runner, as well as from the mechanical power consumed for its driving. After the obtaining of the optimal relative peripheral angle one determines also the optimal incidence angles of the profile for other blade radii. This method permits in the same time to find the optimal profile, using the multitude of the profile characteristics, experimentally studied.

  15. Effect of Protectants on the Fermentation Performance of Wine Yeasts Subjected to Osmotic Stress

    Directory of Open Access Journals (Sweden)

    Andrea Caridi

    2003-01-01

    Full Text Available During alcoholic fermentation of must from dried grapes, yeasts are subjected to very high sugar concentrations, besides other environmental stresses, and they modify their metabolic behaviour giving low ethanol yield and abnormally high acetic acid production. To investigate the protective effect of catechin, inositol, and SO2 on wine yeasts, three thermotolerant strains of Saccharomyces cerevisiae, selected for wine making of must from dried grapes, and three strains of Saccharomyces selected for the production of wine, were inoculated in a sample of must at very high osmotic strength. A significant (p<0.01 or p<0.05 relationship between the addition of 100 mg/L of catechin, inositol or SO2 to the grape must and the change in the metabolic behaviour of the yeasts was observed. Compared to the control and depending on strain and protectant, the fermentation rate after 3 days increased up to 55 %, the ethanol content of the wines increased up to 16 %, the unitary succinic acid production increased up to 55 %, the unitary acetic acid production decreased up to 53 %, and the unitary glycerol production decreased up to 69 %. So by adding catechin, inositol or SO2 to the grape must it is possible to minimise the abnormal fermentation performance that wine yeasts exhibit in wine making of must from dried grapes.

  16. COMT Val158Met modulates subjective responses to intravenous nicotine and cognitive performance in abstinent smokers

    National Research Council Canada - National Science Library

    Herman, A I; Jatlow, P I; Gelernter, J; Listman, J B; Sofuoglu, M

    2013-01-01

    ...)/Val genotype, compared with methionine (Met) carriers, had greater negative subjective effects from IV nicotine and had more severe withdrawal severity following overnight abstinence from smoking...

  17. Longitudinal Associations of Subjective Memory with Memory Performance and Depressive Symptoms: Between-Person and Within-Person Perspectives

    Science.gov (United States)

    Hülür, Gizem; Hertzog, Christopher; Pearman, Ann; Ram, Nilam; Gerstorf, Denis

    2015-01-01

    Clinical diagnostic criteria for memory loss in adults typically assume that subjective memory ratings accurately reflect compromised memory functioning. Research has documented small positive between-person associations between subjective memory and memory performance in older adults. Less is known, however, about whether within-person fluctuations in subjective memory covary with within-person variance in memory performance and depressive symptoms. The present study applied multilevel models of change to nine waves of data from 27,395 participants of the Health and Retirement Study (HRS; mean age at baseline = 63.78; SD = 10.30; 58% women) to examine whether subjective memory is associated with both between-person differences and within-person variability in memory performance and depressive symptoms and explored the moderating role of known correlates (age, gender, education, and functional limitations). Results revealed that across persons, level of subjective memory indeed covaried with level of memory performance and depressive symptoms, with small-to-moderate between-person standardized effect sizes (0.19 for memory performance and 0.21 for depressive symptoms). Within individuals, occasions when participants scored higher than usual on a test of episodic memory or reported fewer-than-average depressive symptoms generated above-average subjective memory. At the within-person level, subjective memory ratings became more sensitive to within-person alterations in memory performance over time and those suffering from functional limitations were more sensitive to within-person alterations in memory performance and depressive symptoms. We take our results to suggest that within-person changes in subjective memory in part reflect monitoring flux in one’s own memory functioning, but are also influenced by flux in depressive symptoms. PMID:25244464

  18. Morphology optimization for enhanced performance in organic photovoltaics

    Science.gov (United States)

    Wodo, Olga; Zola, Jaroslaw; Ganapathysubramanian, Baskar

    2015-03-01

    Organic solar cells have the potential for widespread usage due to their low cost-per-watt and mechanical flexibility. Their wide spread use, however, is bottlenecked primarily by their low solar efficiencies. Experimental evidence suggests that a key property determining the solar efficiency of such devices is the final morphological distribution of the electron-donor and electron-acceptor constituents. By carefully designing the morphology of the device, one could potentially significantly enhance their performance. This is an area of intense experimental effort that is mostly trial-and-error based, and serves as a fertile area for introducing mechanics and computational thinking. In this work, we use optimization techniques coupled with computational modeling to identify the optimal structures for high efficiency solar cells. In particular, we use adaptive population-based incremental learning method linked to graph-based surrogate model to evaluate properties for given structure. We study several different criterions and find optimal structure that that improve the performance of currently hypothesized optimal structures by 29%.

  19. Perceiving the Causes of Objective and Subjective Outcomes Following Motor Performance

    Science.gov (United States)

    Iso-Ahola, Seppo

    1978-01-01

    Subjective perceptions of outcomes (both success and failure) may vary considerably from those of the experimenter's, and causal attributions are based as much on subject's own perceptions of success and failure as on the experimenter's definitions of outcomes. (Author/MJB)

  20. Probabilistic and single-subject retinotopic maps reveal the topographic organization of face patches in the macaque cortex.

    Science.gov (United States)

    Janssens, Thomas; Zhu, Qi; Popivanov, Ivo D; Vanduffel, Wim

    2014-07-30

    Face perception is crucial to survival among social primates. It has been suggested that a group of extrastriate cortical regions responding more strongly to faces than to nonface objects is critical for face processing in primates. It is generally assumed that these regions are not retinotopically organized, as with human face-processing areas, showing foveal bias but lacking any organization with respect to polar angle. Despite many electrophysiological studies targeting monkey face patches, the retinotopic organization of these patches remains largely unclear. We have examined the relationship between cortical face patches and the topographic organization of extrastriate cortex using biologically relevant, phase-encoded retinotopic mapping stimuli in macaques. Single-subject fMRI results indicated a gradual shift from highly retinotopic to no topographic organization from posterior to anterior face patches in inferotemporal cortex. We also constructed a probabilistic retinotopic atlas of occipital and ventral extrastriate visual cortex. By comparing this probabilistic map to the locations of face patches at the group level, we showed that a previously identified posterior lateral temporal face patch (PL) is located within the posterior inferotemporal dorsal (PITd) retinotopic area. Furthermore, we identified a novel face patch posterior PL, which is located in retinotopically organized transitional area V4 (V4t). Previously published coordinates of human PITd coincide with the group-level occipital face area (OFA), according to a probabilistic map derived from a large population, implying a potential correspondence between monkey PL/PITd and human OFA/PITd. Furthermore, the monkey middle lateral temporal face patch (ML) shows consistent foveal biases but no obvious polar-angle structure. In contrast, middle fundus temporal (MF), anterior temporal and prefrontal monkey face patches lacked topographic organization. Copyright © 2014 the authors 0270-6474/14/3410156-12$15.00/0.

  1. Impaired cognitive performance in subjects with methamphetamine dependence during exposure to neutral versus methamphetamine-related cues.

    Science.gov (United States)

    Tolliver, Bryan K; Price, Kimber L; Baker, Nathaniel L; LaRowe, Steven D; Simpson, Annie N; McRae-Clark, Aimee L; Saladin, Michael E; DeSantis, Stacia M; Chapman, Elizabeth; Garrett, Margaret; Brady, Kathleen T

    2012-05-01

    Chronic methamphetamine abuse is associated with cognitive deficits that may impede treatment in methamphetamine-dependent patients. Exposure to methamphetamine-related cues can elicit intense craving in chronic users of the drug, but the effects of exposure to drug cues on cognitive performance in these individuals are unknown. This study assessed whether exposure to methamphetamine-related visual cues can elicit craving and/or alter dual task cognitive performance in 30 methamphetamine-dependent subjects and 30 control subjects in the laboratory. Reaction time, response errors, and inhibition errors were assessed on an auditory Go-No Go task performed by adult participants (total N = 60) while watching neutral versus methamphetamine-related video cues. Craving was assessed with the Within-Session Rating Scale modified for methamphetamine-dependent subjects. Exposure to methamphetamine-related cues elicited craving only in methamphetamine-dependent subjects. Even in the absence of methamphetamine cues, methamphetamine-dependent subjects exhibited slower reaction times and higher rates of both inhibition and response errors than control subjects did. Upon exposure to methamphetamine cues, rates of both response errors and inhibition errors increased significantly in methamphetamine-dependent subjects. Control subjects exhibited no increase in inhibition errors and only slightly increased rates of response errors upon exposure to methamphetamine cues. Response error rates, but not inhibition error rates or reaction times, during methamphetamine cue exposure were significantly associated with craving scores in methamphetamine-dependent subjects. Methamphetamine-dependent individuals exhibit cognitive performance deficits that are more pronounced during exposure to methamphetamine-related cues. Interventions that reduce cue reactivity may have utility in the treatment of methamphetamine dependence.

  2. Assessment of volatile organic compounds from banana Terra subjected to different alcoholic fermentation processes

    Directory of Open Access Journals (Sweden)

    Michely CAPOBIANGO

    2016-01-01

    Full Text Available Abstract Banana characteristics could provide yeast growth and support the action of yeast to produce beverages. The effects of enzymatic treatment, centrifugation, commercial yeast and two selected strains of Saccharomyces cerevisiae were investigated using the fermented banana Terra. Volatile organic compounds (VOCs were determined by solid phase microextraction using gas chromatography mass spectrometry. The results showed that the condition employing enzymatic treatment, centrifugation and wet commercial yeast provided maximum ethanol yield (86% and effiency (98%. Twenty-two compounds of distinct chemical classes were analysed including alcohols, esters, acids and aldehydes. The concentrations of the VOCs differed depending on the fermentation condition and were more influenced by using different yeasts. The limits of detection and quantification ranged from 0.056 to 2.694 mg L–1 and 0.057 to 2.904 mg L–1 respectively. Among the most prevalent VOCs the higher alcohols ranged from 353 to 1017 mg per 100 mL of anhydrous alcohol. The fermented banana studied showed a composition similar to other fermented fruit pulps.

  3. SUBJECTIVITY AND HYBRIDITY IN THE AGE OF INTERACTIVE INTERNET MEDIA: THE MUSICAL PERFORMANCES OF CHARICE PEMPENGCO AND ARNEL PINEDA

    Directory of Open Access Journals (Sweden)

    Christi-Anne Castro

    2010-06-01

    Full Text Available This paper examines hybrid subjectivity in the performances by and in the reception of musical artists utilizing the technology of interactive Internet media. It focuses on the career trajectories of the popular Filipino music performers Charice Pempengco and Arnel Pineda, taking into account how their transnational presence and dissemination through internet media communities affect perceptions of locality, nationality and race.

  4. Performance Levels in Science and Other Subjects for Jamaican Adolescents Attending Single-Sex and Co-Educational High Schools.

    Science.gov (United States)

    Hamilton, Marlene A.

    1985-01-01

    Examination results from 1146 Jamaican high school students in single-sex and coeducational schools indicated students from coeducational schools had lower performance on all measures. A subsample provided more information on sex differences, performance in individual subjects, and students receiving grades of A or B. (DH)

  5. A pilot study to evaluate simulated driving performance and cognitive function in healthy subjects and patients with restless legs syndrome

    Directory of Open Access Journals (Sweden)

    Chen D

    2013-10-01

    Full Text Available Dan Chen,1 Paula Shaw,2 Daniel M Canafax,1,3 James Catesby Ware4 1XenoPort, Inc., Santa Clara, CA, USA; 2Charles River Northwest, Tacoma, WA, USA; 3Theravance Inc., South San Francisco, CA, USA; 4Division of Sleep Medicine, Eastern Virginia Medical School, Norfolk, VA, USA Objective: Symptoms of restless legs syndrome (RLS usually occur during the evening and night time, resulting in disrupted sleep and subsequent daytime fatigue. This study compared simulated driving performance, alertness, and cognitive function between healthy subjects and patients with a diagnosis of RLS. Methods: Fifteen healthy subjects and 15 untreated RLS subjects were enrolled and completed two driving tests. The first test occurred at 4 PM followed by the second test at 8 AM the next morning. Outcome measures included lane position variability (LPV, speed variability, frequency of simulated crashes (off-road events or collision, and brake reaction time. Other assessments included visual analog scale (VAS of alertness and the Brief Assessment of Cognition (BAC. Results: Overall, RLS patients and healthy subjects performed similarly on driving assessments. Two subjects within each group experienced off-road events. RLS patients had less alertness on the VAS than healthy subjects before and after driving assessments. Both groups scored similarly on the cognitive function assessments. Conclusion: Despite reported diminished alertness, RLS patients did not demonstrate impairment in driving or cognitive performance. Keywords: restless legs syndrome, simulated driving performance, cognitive function

  6. Water- versus land-based exercise in elderly subjects: effects on physical performance and body composition

    National Research Council Canada - National Science Library

    Bergamin, Marco; Ermolao, Andrea; Tolomio, Silvia; Berton, Linda; Sergi, Giuseppe; Zaccaria, Marco

    2013-01-01

    The aim of this study was to assess the effectiveness of a 24-week exercise protocol carried out in geothermal spring water to improve overall physical function and muscle mass in a group of healthy elderly subjects...

  7. Evaluation of performance, safety, subject acceptance, and compliance of a disposable autoinjector for subcutaneous injections in healthy volunteers.

    Science.gov (United States)

    Berteau, Cecile; Schwarzenbach, Florence; Donazzolo, Yves; Latreille, Mathilde; Berube, Julie; Abry, Herve; Cotten, Joël; Feger, Celine; Laurent, Philippe E

    2010-10-05

    A disposable autoinjector was developed for subcutaneous (SC) self-injection by patients with chronic diseases. To verify its performance and evaluate its acceptance, a clinical study was conducted in healthy volunteers, comparing SC injections performed by subjects using the autoinjector with SC injections performed by nurses using a syringe. This was a randomized, single-center, crossover study comparing SC self-injection using an autoinjector with SC nurse-administered injection using a syringe. Two volumes (0.2 mL and 1 mL) were injected into healthy volunteers. Study objectives included assessment of the accuracy and consistency of the volume injected by the injection systems, and skin reaction and pain associated with the injection. The fluid depot in the SC tissue layer was evaluated by ultrasound. Subject acceptance was evaluated using questionnaires on attitudes and emotions towards the injection technique, and challenged by seeking the subjects' preferred system for a final study injection or future treatment. A total of 960 injections (480 with autoinjector, 480 with syringe) were performed in 40 subjects. There were no significant differences in mean fluid leakage and injected volumes between the systems. Pain associated with the injection was significantly lower with the auto-injector than with the syringe. Local skin reaction at the injection site was overall satisfactory. Injections were appropriately performed by all subjects. At study end, all 40 subjects preferred the autoinjector for a final study injection and for future treatment. This study indicated that the autoinjector used by the subject was similar to a syringe used by a nurse in terms of performance and safety in administering the injections, and better in terms of pain, overall acceptance, and preference.

  8. High Performance Organ-Specific Nuclear Medicine Imagers.

    Science.gov (United States)

    Majewski, Stan

    2006-04-01

    One of the exciting applications of nuclear science is nuclear medicine. Well-known diagnostic imaging tools such as PET and SPECT (as well as MRI) were developed as spin-offs of basic scientific research in atomic and nuclear physics. Development of modern instrumentation for applications in particle physics experiments offers an opportunity to contribute to development of improved nuclear medicine (gamma and positron) imagers, complementing the present set of standard imaging tools (PET, SPECT, MRI, ultrasound, fMRI, MEG, etc). Several examples of new high performance imagers developed in national laboratories in collaboration with academia will be given to demonstrate this spin-off activity. These imagers are designed to specifically image organs such as breast, heart, head (brain), or prostate. The remaining and potentially most important challenging application field for dedicated nuclear medicine imagers is to assist with cancer radiation treatments. Better control of radiation dose delivery requires development of new compact in-situ imagers becoming integral parts of the radiation delivery systems using either external beams or based on radiation delivery by inserting or injecting radioactive sources (gamma, beta or alpha emitters) into tumors.

  9. Evaluation of performance, safety, subject acceptance, and compliance of a disposable autoinjector for subcutaneous injections in healthy volunteers

    OpenAIRE

    Berteau, Cecile; Schwarzenbach, Florence; Donazzolo, Yves; Latreille, Mathilde; Berube, Julie; Abry, Herve; Cotten, Jo?l; Feger, Celine; Laurent, Philippe E

    2010-01-01

    Objective: A disposable autoinjector was developed for subcutaneous (SC) self-injection by patients with chronic diseases. To verify its performance and evaluate its acceptance, a clinical study was conducted in healthy volunteers, comparing SC injections performed by subjects using the autoinjector with SC injections performed by nurses using a syringe. Methods: This was a randomized, single-center, crossover study comparing SC self-injection using an autoinjector with SC nurse-administered ...

  10. Enhanced performance of dicationic ionic liquid electrolytes by organic solvents.

    Science.gov (United States)

    Li, Song; Zhang, Pengfei; Fulvio Pasquale, F; Hillesheim Patrick, C; Feng, Guang; Dai, Sheng; Cummings Peter, T

    2014-07-16

    The use of dicationic ionic liquid (DIL) electrolytes in supercapacitors is impeded by the slow dynamics of DILs, whereas the addition of organic solvents into DIL electrolytes improves ion transport and then enhances the power density of supercapacitors. In this work, the influences of organic solvents on the conductivity of DILs and the electrical double layer (EDL) of DIL-based supercapacitors are investigated using classical molecular dynamics simulation. Two types of organic solvents, acetonitrile (ACN) and propylene carbonate (PC), were used to explore the effects of different organic solvents on the EDL structure and capacitance of DIL/organic solvent-based supercapacitors. Firstly, it was found that the conductivity of DIL electrolytes was greatly enhanced in the presence of the organic solvent ACN. Secondly, a stronger adsorption of PC on graphite results in different EDL structures formed by DIL/ACN and DIL/PC electrolytes. The expulsion of co-ions from EDLs was observed in DIL/organic solvent electrolytes rather than neat DILs and this feature is more evident in DIL/PC. Furthermore, the bell-shaped differential capacitance-electric potential curve was not essentially changed by the presence of organic solvents. Comparing DIL/organic solvent electrolytes with neat DILs, the capacitance is slightly increased by organic solvents, which is in agreement with experimental observation.

  11. Agreement between the methods: Subjective Global Nutritional Assessment and the nutritional assessment of the World Health Organization.

    Science.gov (United States)

    Pimenta, Fabiana S; Oliveira, Cássia M; Hattori, Wallisen T; Teixeira, Kely R

    2017-11-12

    To assess the agreement between the results of the Subjective Global Nutritional Assessment questionnaire, adapted for children and adolescents of the Brazilian population, and the nutritional status assessment method through growth curves and the classification of the World Health Organization in a pediatric hospital service. This was an analytical, quantitative, cross-sectional study. During the data collection period, the nutritional status of all patients from 0 to 12 years of age, admitted to the pediatric unit of a university hospital, was concomitantly assessed according to the Subjective Global Nutritional Assessment and World Health Organization curves. To determine the assessment and agreement between these methods, the Kappa and Kendall coefficients were used, respectively, considering a significance level of 5%. Sixty-one children participated, with a predominance of males. It was observed that the highest frequency of equivalent results occurred among the group classified as well nourished, and that only the height/age variable showed a close agreement between the methods. Additionally, there was a good correlation only for the weight/height variable between the assessment tools used. Due to the low agreement between the methods, the combination of both may be beneficial for the nutritional assessment of pediatric patients, collaborating with the early diagnosis of nutritional alterations and facilitating the use of adequate dietary therapy. Copyright © 2017. Published by Elsevier Editora Ltda.

  12. A genome-wide supported psychiatric risk variant in NCAN influences brain function and cognitive performance in healthy subjects.

    Science.gov (United States)

    Raum, Heidelore; Dietsche, Bruno; Nagels, Arne; Witt, Stephanie H; Rietschel, Marcella; Kircher, Tilo; Krug, Axel

    2015-01-01

    The A allele of the single nucleotide polymorphism (SNP) rs1064395 in the NCAN gene has recently been identified as a susceptibility factor for bipolar disorder and schizophrenia. NCAN encodes neurocan, a brain-specific chondroitin sulfate proteoglycan that is thought to influence neuronal adhesion and migration. Several lines of research suggest an impact of NCAN on neurocognitive functioning. In the present study, we investigated the effects of rs1064395 genotype on neural processing and cognitive performance in healthy subjects. Brain activity was measured with functional magnetic resonance imaging (fMRI) during an overt semantic verbal fluency task in 110 healthy subjects who were genotyped for the NCAN SNP rs1064395. Participants additionally underwent comprehensive neuropsychological testing. Whole brain analyses revealed that NCAN risk status, defined as AA or AG genotype, was associated with a lack of task-related deactivation in a large left lateral temporal cluster extending from the middle temporal gyrus to the temporal pole. Regarding neuropsychological measures, risk allele carriers demonstrated poorer immediate and delayed verbal memory performance when compared to subjects with GG genotype. Better verbal memory performance was significantly associated with greater deactivation of the left temporal cluster during the fMRI task in subjects with GG genotype. The current data demonstrate that common genetic variation in NCAN influences both neural processing and cognitive performance in healthy subjects. Our study provides new evidence for a specific genetic influence on human brain function. © 2014 Wiley Periodicals, Inc.

  13. Secondary School Science Predictors of Academic Performance in University Bioscience Subjects

    Science.gov (United States)

    Green, Rod; Brown, Elizabeth; Ward, Alex

    2009-01-01

    In 2009 the Faculty of Health Sciences at La Trobe University in Melbourne, Australia is introducing a common first year for 11 different undergraduate courses in the faculty. Current prerequisite science entry requirements vary with course and range from none to at least two science or mathematics subjects and from [approximately]50 to 99 in…

  14. Effect of fish oil on cognitive performance in older subjects: a randomized, controlled trial

    NARCIS (Netherlands)

    van de Rest, O.; Geleijnse, J.M.; Kok, F. J.; van Staveren, W.A.; Dullemeijer, C.; Olde Rikkert, M.G.M.; Beekman, A.T.F.; de Groot, C.P.

    2008-01-01

    Background: High intake of n-3 polyunsaturated fatty acids may protect against age-related cognitive decline. However, results from epidemiologic studies are inconclusive, and results from randomized trials in elderly subjects without dementia are lacking. Objective: To investigate the effect of

  15. Subjective vs objective predictors of functional knee joint performance in anterior cruciate ligament-reconstructed patients

    DEFF Research Database (Denmark)

    Holsgaard-Larsen, Anders; Jensen, Carsten; Aagaard, Per

    2014-01-01

    BACKGROUND: Associations between objective and subjective measures of knee function may facilitate rehabilitation in ACL-patients. AIM: The aim of this study is to investigate if a test-battery of functional and/or muscle outcomes are associated with Knee osteoarthritis outcome score (KOOS) subsc...

  16. Subspecialty Exposure in a Psychiatry Clerkship Does Not Improve Student Performance in the Subject Examination

    Science.gov (United States)

    Retamero, Carolina; Ramchandani, Dilip

    2013-01-01

    Objective: The authors compared the NBME subject examination scores and subspecialty profiles of 3rd-year medical students who were assigned to psychiatry subspecialties during their clerkship with those who were not. Method: The authors collated and analyzed the shelf examination scores, the clinical grades, and the child psychiatry and emergency…

  17. Effect of fish oil on cognitive performance in older subjects: a randomized, controlled trial.

    NARCIS (Netherlands)

    Rest, O van de; Geleijnse, J.M.; Kok, F.J.; Staveren, W.A. van; Dullemeijer, C.; Olderikkert, M.G.; Beekman, A.T.; Groot, CP de

    2008-01-01

    BACKGROUND: High intake of n-3 polyunsaturated fatty acids may protect against age-related cognitive decline. However, results from epidemiologic studies are inconclusive, and results from randomized trials in elderly subjects without dementia are lacking. OBJECTIVE: To investigate the effect of

  18. RESTRICTION OF RIGHTS OF NON-GOVERNMENTAL ORGANIZATIONS IN RUSSIA AS A SUBJECT OF JUDICIAL CONTROL

    Directory of Open Access Journals (Sweden)

    P. Vinogradova

    2016-01-01

    Full Text Available This article examines the issue of the regulation of the Russian state’s control over the activities of non-governmental organizations and the limits to that control. Important changes made in 2014–2016 in the regulation of the organization and activity of judicial power show that the tasks of transformation of the judicial power structure, establishment of effective control mechanisms and strengthening of the requirements on substantiation of court judgments have become more topical. Addressing this issue and taking it as the subject of study are motivated by the small number of works dealing with this issue. The task of enhancing the effectiveness of the exercise of their powers by public authorities necessitates consideration of special features of judicial control over disputes related to restriction of rights. The adoption of the Administrative Procedure Code of the Russian Federation and the statutory formalization of special features of judicial control with respect to certain non-commercial organizations imply changes in judicial practice related to challenging the decisions made by public authorities. In addition to special procedural features such changes also facilitate the spread in law enforcement practice of legal arrangements like the ‘proportionality test’ and determining the balance between competing constitutional values and conditions of public order observance. The analysis carried out by the author reveals tendencies of improvement in legislative action and allows identification of future lines of improvement in judicial practice.

  19. Differences between Functional and Subjective Overconfidence in Postdiction Judgments of Test Performance

    Science.gov (United States)

    Shake, Matthew C.; Shulley, Leah J.

    2014-01-01

    Introduction: Recent research has shown that students tend to be overconfident when judging future performance on coursework, particularly students with lower academic ability. Some research suggests that these lower performing students are "doubly cursed" in that they are not only less capable of assessing their own performance, but…

  20. Associations of subjective vitality with DNA damage, cardiovascular risk factors and physical performance

    DEFF Research Database (Denmark)

    Maynard, Scott; Keijzers, Guido; Hansen, A-M

    2015-01-01

    To examine associations of DNA damage, cardiovascular risk factors and physical performance with vitality, in middle-aged men. We also sought to elucidate underlying factors of physical performance by comparing physical performance parameters to DNA damage parameters and cardiovascular risk factors....

  1. Beyond feedback control: the interactive use of performance management systems. Implications for process innovation in Italian healthcare organizations.

    Science.gov (United States)

    Demartini, Chiara; Mella, Piero

    2014-01-01

    This paper shows how the use of performance management systems affects managers' perception of satisfaction, the effectiveness of the control system and the performance related to process innovation. An exploratory empirical research has been conducted on 85 managers operating in Italian healthcare organizations. Empirical findings put forward that the interactive--as opposed to diagnostic--use of performance management systems enhances managerial satisfaction with the control system and managerial perception of effectiveness. The present study then showed that it is not the control itself that is an obstacle to innovation in organizations in general (and in health organizations in particular) but the diagnostic use of the control mechanisms, which impedes the interaction between the control personnel and those subject to the control. Finally, this paper addresses managerial implications and further research avenues. Copyright © 2013 John Wiley & Sons, Ltd.

  2. The Performance of Edge Organizations in a Collaborative Task

    National Research Council Canada - National Science Library

    Chang, Kok M

    2005-01-01

    .... In this thesis, the author investigates how the various characteristics of agents influence the efficiency of an edge organization in an intelligence-gathering task using an agent-based simulation...

  3. PERFORMANCE MANAGEMENT APPROACHES IN ECONOMIC ORGANIZATIONS USING INFORMATION TECHNOLOGY

    National Research Council Canada - National Science Library

    Anca Mehedintu; Cerasela Pîrvu; Cristian Pîrvu

    2012-01-01

    ... areas.In these days of globalization and intensive use of information technology, the organizations must defineand implement an appropriate strategy that would support their medium-term development...

  4. Organic solar cells: Degradation processes and approaches to enhance performance

    Science.gov (United States)

    Fungura, Fadzai

    Organic solar cells (OSCs) have attracted a lot of attention due to their potential as flexible, lightweight, and low-cost renewable energy sources. Significant improvements have been made in increasing the devices' power conversion efficiency (PCE) and extensive efforts to understand degradation mechanisms and increase OSCs' lifetimes are ongoing. OSCs with higher than 10% efficiency have been reported. Enhanced stability and efficiency of inverted poly(3-hexylthiophene) (P3HT) solar cells with Cesium (Cs) halides were achieved by spin-coating Bphen (4,7-di(phenyl)-1,10-phenanthroline) on the halide layer and adding an 100nm polystyrene beads layer on the blank side of the OSC. To investigate photodegradation in a low-bandgap polymer, PBDTTT-EFT (benzo[1,2-b:4,5-b']dithiophene (BDT) and thieno[3,4-b]-thiophene), PBDTTT-EFT:PCBM bulk heterojunction (BHJ) solar cells were irradiated under 1X sun intensity and their electronic measurements were monitored over time. The electronic measurements revealed an increase in deep defect density in the polymer and at the donor-acceptor (D/A) interface of BHJ SCs and an increase in charge recombination as well as a decrease in external quantum efficiency, charge collection, short circuit current, open circuit voltage and hole mobility. Filtering blue and UV light resulted in drastically reduced photodegradation. Electron paramagnetic resonance measurements were performed on the photodegraded polymer and BHJ films, and revealed for the first time experimental evidence for metastable carbon dangling bonds (g=2.0029+/-0.0004) formed by blue/UV irradiation of the films. Dark EPR showed an increase in densities of other spin-active sites in the polymer, fullerene and polymer:fullerene blends in agreement with electronic measurements. The EPR results revealed that the carbon dangling bonds were at the D/A interface. These studies helped to better understand degradation mechanisms in a low-bandgap polymer, PBDTTT-EFT, ways to enhance

  5. Subjective Perception of Sports Performance, Training, Sleep and Dietary Patterns of Malaysian Junior Muslim Athletes during Ramadan Intermittent Fasting

    OpenAIRE

    Singh, Rabindarjeet; Hwa, Ooi Cheong; Roy, Jolly; Jin, Chai Wen; Ismail, Siti Musyrifah; Lan, Mohamad Faizal; Hiong, Loo Lean; Aziz, Abdul-Rashid

    2011-01-01

    Purpose To examine the subjective perception of daily acute fasting on sports performance, training, sleep and dietary patterns of Muslim athletes during the Ramadan month. Methods Seven hundred and thirty-four (411 male and 323 female) Malaysian Junior-level Muslim athletes (mean age 16.3 ± 2.6 y) participated in the survey which was designed to establish the personal perception of their sport performance, sleep pattern, food and fluid intake during Ramadan fasting. The survey was conducted ...

  6. Performance Gaps between Online and Face-to-Face Courses: Differences across Types of Students and Academic Subject Areas

    Science.gov (United States)

    Xu, Di; Jaggars, Shanna S.

    2014-01-01

    Using a dataset containing nearly 500,000 courses taken by over 40,000 community and technical college students in Washington State, this study examines the performance gap between online and face-to-face courses and how the size of that gap differs across student subgroups and academic subject areas. While all types of students in the study…

  7. Subjective Estimates of Job Performance after Job Preview: Determinants of Anticipated Learning Curves

    Science.gov (United States)

    Ackerman, Phillip L.; Shapiro, Stacey; Beier, Margaret E.

    2011-01-01

    When people choose a particular occupation, they presumably make an implicit judgment that they will perform well on a job at some point in the future, typically after extensive education and/or on-the-job experience. Research on learning and skill acquisition has pointed to a power law of practice, where large gains in performance come early in…

  8. Towards High Performance Organic Photovoltaic Cells: A Review of Recent Development in Organic Photovoltaics

    Directory of Open Access Journals (Sweden)

    Junsheng Yu

    2014-09-01

    Full Text Available Organic photovoltaic cells (OPVs have been a hot topic for research during the last decade due to their promising application in relieving energy pressure and environmental problems caused by the increasing combustion of fossil fuels. Much effort has been made toward understanding the photovoltaic mechanism, including evolving chemical structural motifs and designing device structures, leading to a remarkable enhancement of the power conversion efficiency of OPVs from 3% to over 15%. In this brief review, the advanced progress and the state-of-the-art performance of OPVs in very recent years are summarized. Based on several of the latest developed approaches to accurately detect the separation of electron-hole pairs in the femtosecond regime, the theoretical interpretation to exploit the comprehensive mechanistic picture of energy harvesting and charge carrier generation are discussed, especially for OPVs with bulk and multiple heterojunctions. Subsequently, the novel structural designs of the device architecture of OPVs embracing external geometry modification and intrinsic structure decoration are presented. Additionally, some approaches to further increase the efficiency of OPVs are described, including thermotics and dynamics modification methods. Finally, this review highlights the challenges and prospects with the aim of providing a better understanding towards highly efficient OPVs.

  9. Organization and firm performance in the Czech Republic

    Czech Academy of Sciences Publication Activity Database

    Jurajda, Štěpán; Stančík, Juraj

    2013-01-01

    Roč. 22, č. 1 (2013), s. 85-110 ISSN 1210-0455 Institutional support: PRVOUK-P23 Keywords : linked employer-employee data * organizational workers * productivity differentials Subject RIV: AH - Economics Impact factor: 0.208, year: 2013 http://www.vse.cz/polek/download.php?jnl=pep&pdf=442.pdf

  10. A Framework for Assessing the Performance of Nonprofit Organizations

    Science.gov (United States)

    Lee, Chongmyoung; Nowell, Branda

    2015-01-01

    Performance measurement has gained increased importance in the nonprofit sector, and contemporary literature is populated with numerous performance measurement frameworks. In this article, we seek to accomplish two goals. First, we review contemporary models of nonprofit performance measurement to develop an integrated framework in order to…

  11. RCT - subjective physical performance and quality of life after a 6-month programmed sports therapy (PST) in patients with haemophilia.

    Science.gov (United States)

    Runkel, B; Von Mackensen, S; Hilberg, T

    2017-01-01

    Musculoskeletal bleedings lead to limitations in the locomotor system and consequently, in health-related quality of life (HRQoL) in patients with haemophilia (PwH). Sports therapy is increasingly recommended to improve their physical performance. Until today, randomised controlled studies investigating changes in physical performance in PwH are rare. This study investigates the impact of programmed sports therapy on the subjective physical performance and the HRQoL in PwH. A randomised controlled trial (RCT) was conducted with a training intervention for over 6 months. For this purpose, 64 PwH with moderate (n = 5) or severe (n = 59) haemophilia A (n = 57) or B (n = 7) were randomised into two groups - intervention (IG) or control group (CG). The HRQoL was assessed with the SF-36 questionnaire and the disease-specific Haem-A-QoL before and after the intervention. The subjective physical performance was tested by the HEP-Test-Q. After the 6-month training intervention, PwH in the IG subjectively reported significant better 'endurance' (P = 0.000) in the HEP-Test-Q compared to the CG. In the SF-36, a significant difference in the domains 'general health perceptions' (P = 0.005) and 'mental health' (P = 0.001) was detected. The haemophilia-specific HRQoL questionnaire showed a significant improvement in the dimensions 'feeling' (P = 0.049), 'work' (P = 0.046) and 'family' (P = 0.040). In the first RCT evaluating the impact of a 6-month training intervention on the subjective perception of PwH, an increase in subjective physical performance and some domains of HRQoL was demonstrated in the IG. Specific sports therapy should be included into the comprehensive treatment under supervision and monitoring by experienced staff. © 2016 John Wiley & Sons Ltd.

  12. Performance of Pre-Stressed Sandwich Composites Subjected to Shock Wave Loading

    Directory of Open Access Journals (Sweden)

    Shukla A.

    2010-06-01

    Full Text Available The present paper experimentally studies the dynamic behaviour of prestressed sandwich composites under blast loading. The in-plane static compression loadings are implemented on the sandwich composites before they are subjected to the transverse shock wave loading. Three different pre-stress levels are chosen. 3-D realtime deformation data are captured by two high-speed photography systems: a backview Digital Image Correlation (DIC system and a side-view camera system. The results show that pre-stresses can induce local buckling in the front face-sheet of sandwich composites, consequently reduce the blast resistance of sandwich composites.

  13. Aligning the down-sized organization for high performance

    Energy Technology Data Exchange (ETDEWEB)

    Cort, G.; Holsapple, K.

    1997-12-31

    The Quality Management Group (QMG) at the Los Alamos National Laboratory provides expert support to the Laboratory`s diverse programs, projects and facilities. Organized as an internal consulting group, the QMG furnishes comprehensive quality management services to requesting organizations throughout the Laboratory. Based upon the needs and expectations of the requester, these services range from classical quality control to regulatory compliance to process characterization and improvement, customer relationship management, information gathering and metrics. In September 1995 the Laboratory Director announced a downsizing effort targeted to reduce the Laboratory`s cost of doing business and thereby improve its competitiveness. The downsizing effort was targeted on support organizations--laboratory divisions, groups, programs, and projects chartered with operating the administrative infrastructure within which Los Alamos` technical programs function. This report discusses the downsizing, its aftermath, strategies for solutions to lower morale, initiatives, and results.

  14. Concept mapping improves academic performance in problem solving questions in biochemistry subject

    National Research Council Canada - National Science Library

    Baig, Mukhtiar; Tariq, Saba; Rehman, Rehana; Ali, Sobia; Gazzaz, Zohair J

    2016-01-01

    To assess the effectiveness of concept mapping (CM) on the academic performance of medical students' in problem-solving as well as in declarative knowledge questions and their perception regarding CM...

  15. Effects of Sleep Hygiene Education on Subjective Sleep Quality and Academic Performance

    National Research Council Canada - National Science Library

    Şahin, Erkan Melih

    .... It is known that sleep quality and daytime sleepiness cause decrasing academic performans. For this reason we aimed to investigate the effects of a sleep hygiene education on sleep quality and academic performance of first year medical students...

  16. Relationship between ACE-DD polymorphism and diastolic performance in healthy subjects.

    Science.gov (United States)

    Di Pasquale, Pietro; Cannizzaro, Sergio; Scalzo, Sebastiano; Giubilato, Alfonso; Maringhini, Giorgio; Giambanco, Francesco; Sarullo, Filippo; Tarsia, Giandomenico; Giammanco, Marco; Gaspare, Parrinello; Paterna, Salvatore

    2004-05-01

    The ACE-D allele has been associated with cardiovascular disease. The study evaluates the relationship between the ACE-ID genotypes and diastolic function in healthy subjects after 6 years of follow-up. Two hundred and seventy-five healthy volunteers aged 25-55 years had normal physical examination, 12-lead ECG, acceptable echocardiographic windows and echocardiogram at entry. Venous blood was drawn for DNA analysis. Two hundred and forty-two subjects completed 6 years of follow-up. Three genetically distinct groups were obtained: ACE-DD group (n=71, 26F/45M, mean age 48 +/- 7 years); ACE-ID (n=115, 39F/76M, mean age 40 +/- 7 years); and ACE-II (n=56, 20F/36M, mean age 47 +/- 6 years). Significant differences in E/A ratio were found between ACE-DD and ACE-ID, and ACE II (p=0.028, <0.0001, 0.0001), respectively. After 6 years, echocardiography showed a significant reduction of E/A ratio in the ACE-DD group, p=0.0001. The data suggest that ACE-DD is associated with deteriorating myocardial diastolic properties.

  17. Relation of eye dominancy with color vision discrimination performance ability in normal subjects

    Directory of Open Access Journals (Sweden)

    Belkıs Koçtekin

    2013-10-01

    Full Text Available AIM: To evaluate the performance of dominant eye (DE for color vision discrimination ability among the medical students with normal color vision.CONCLUSION: The color vision discrimination performance ability was found prominent for DE. This superiority was attributed to higher sensitivityof the r/g local color spectral region. We conclude that DE has priority in r/g color spectral region, probably including inhibition of NDE.

  18. Effects of Sleep Hygiene Education on Subjective Sleep Quality and Academic Performance

    OpenAIRE

    Erkan Sahin

    2014-01-01

    Aim: Sleep problems are common in students with one third of university students reporting insufficient sleep. It is known that sleep quality and daytime sleepiness cause decrasing academic performans. For this reason we aimed to investigate the effects of a sleep hygiene education on sleep quality and academic performance of first year medical students. Material and Method: Self-reported sleep data and academic performance of 131 first grade medical students were collected. To all students e...

  19. Flupentixolhydrochloride in low dosages: effects on perceptual and psychomotor performance in emotionally stable and emotionally labile healthy subjects.

    Science.gov (United States)

    Rösler, F; Stieglitz, R D; Manzey, D

    1986-01-01

    Effects of flupentixol on performance were evaluated in a double-blind study with 107 healthy male subjects. Experimental factors were dosage (0, 1, and 2 mg Fluanxol 0.5/day), the trait variable 'neuroticism' (high vs. low score on a questionnaire scale), and time of measurement (before and after 4 days of treatment). Drug effects were measured by means of seven paper-and-pencil tests and eight apparatus tests covering the following cognitive functions: endurance in attention, spacial orientation, flexibility and speed of closure, perceptual speed, response speed, psychomotor coordination, knowledge of traffic rules, and basic motoric tempo. Univariate and multivariate ANOVAs disclosed that flupentixol has detrimental effects on perceptual and psychomotor functions, in particular when administered in a dosage of 2 mg/day. These treatment effects did not interact with the trait variable neuroticism. Nevertheless, there were substantial differences between emotionally stable and emotionally labile subjects in both absolute performance level and change of performance over time.

  20. Mismatch negativity and cognitive performance for the prediction of psychosis in subjects with at-risk mental state.

    Directory of Open Access Journals (Sweden)

    Yuko Higuchi

    Full Text Available BACKGROUND: A shorter duration of untreated psychosis has been associated with better prognosis in schizophrenia. In this study, we measured the duration mismatch negativity (dMMN, an event-related potential, and cognitive performance in subjects with at-risk mental state (ARMS, patients with first-episode or chronic schizophrenia, and healthy volunteers. The main interest was to determine if these neurocognitive measures predict progression to overt schizophrenia in ARMS subjects. METHODOLOGY/PRINCIPAL FINDINGS: Seventeen ARMS subjects, meeting the criteria of the Comprehensive Assessment of At-Risk Mental State, 31 schizophrenia patients (20 first-episode and 11 chronic and healthy controls (N=20 participated in the study. dMMN was measured by an auditory odd-ball paradigm at baseline. Neuropsychological performance was evaluated by the Japanese version of the Brief assessment of cognitive function of schizophrenia (BACS-J. The first-episode schizophrenia group showed significantly smaller amplitudes at frontal electrodes than did control subjects whereas chronic patients elicited smaller amplitudes at frontal and central electrodes, consistent with previous reports. During the follow-up period, 4 out of the 17 ARMS subjects transitioned to schizophrenia (converters while 13 did not (non-converters. Specifically, dMMN amplitudes of non-converters did not differ from those of healthy controls, while converters showed significantly smaller dMMN amplitudes at some electrodes compared to control subjects. Converters performed significantly worse on tests of working memory, verbal fluency, and attention/information processing than did non-converters. There was a significant positive correlation between dMMN amplitudes at the frontal electrodes and verbal fluency, as measured by the BACS, in the AMRS subjects as a whole. CONCLUSIONS/SIGNIFICANCE: ARMS subjects who later developed schizophrenia elicited smaller dMMN amplitudes to begin with, compared

  1. Views from the Outside: How the Nonprofit Community Characterizes High Performance Nonprofit Organizations

    Directory of Open Access Journals (Sweden)

    Claudia PETRESCU

    2006-10-01

    Full Text Available What high performance means for nonprofit organizations and how to define high performance is still a discussed issue. Building on Paul Light’s work and the Standards of Excellence Codes of Conduct developed by the Maryland Association of Nonprofit Organizations, this research presents how the community, respectively the nonprofit organizations themselves, views high performance and define the characteristics of high performing organizations. The paper also analysis how the community’s perception of high performance compares with the Standards of Excellence Codes of Conduct.

  2. Comparison of the pedalling performance induced by magnetic and electrical stimulation cycle ergometry in able-bodied subjects.

    Science.gov (United States)

    Szecsi, J; Straube, A; Fornusek, C

    2014-04-01

    The purpose of the study was to compare the mechanical power and work generated by able-bodied subjects during functional magnetic stimulation (FMS) vs. functional electrical stimulation (FES) induced ergometer training conditions. Both stimulation methods were applied at a 30 Hz frequency to the quadriceps muscles of 22 healthy able-bodied subjects to induce cycling for 4× four minutes or until exhaustion. FMS was performed via large surface, cooled coils, while FES was applied with a typical stimulation setup used for cycling. Significantly more (pstimulation induced pain and fatigue mechanisms of the neuromuscular system. Copyright © 2013 IPEM. Published by Elsevier Ltd. All rights reserved.

  3. Organization and firm performance in the Czech Republic

    Czech Academy of Sciences Publication Activity Database

    Jurajda, Štěpán; Stančík, Juraj

    2013-01-01

    Roč. 22, č. 1 (2013), s. 85-110 ISSN 1210-0455 R&D Projects: GA MŠk(CZ) 7E08096 Institutional support: RVO:67985998 Keywords : linked employer-employee data * organizational workers * productivity differentials Subject RIV: AH - Economics Impact factor: 0.208, year: 2013 http://www.vse.cz/polek/download.php?jnl=pep&pdf=442.pdf

  4. PERFORMANCE MEASUREMENT AND CIVIL SERVICES REFORMS IN PAKISTAN: A STUDY OF PUBLIC SECTOR ORGANIZATIONS

    OpenAIRE

    Rehman Safdar

    2012-01-01

    Research interest in the area of performance measurement (PM) in public sector organizations is increasing. The main purpose of the paper is to explore the research interest in the area of performance measurement (PM) in the public sector organizations. Recently, literature on this topic recognized the relevant critique of public sector organizations pivoting around its view of managers and organizations as primarily passive adaptors to change. This paper also explores how the public sector o...

  5. Can a multimedia tool help students' learning performance in complex biology subjects?

    Directory of Open Access Journals (Sweden)

    Pinar Koseoglu

    2015-11-01

    Full Text Available The aim of the present study was to determine the effects of multimedia-based biology teaching (Mbio and teacher-centered biology (TCbio instruction approaches on learners' biology achievements, as well as their views towards learning approaches. During the research process, an experimental design with two groups, TCbio (n = 22 and Mbio (n = 26, were used. The results of the study proved that the Mbio approach was more effective than the TCbio approach with regard to supporting meaningful learning, academic achievement, enjoyment and motivation. Moreover, the TCbio approach is ineffective in terms of time management, engaging attention, and the need for repetition of subjects. Additionally, the results were discussed in terms of teaching, learning, multimedia design as well as biology teaching/learning.

  6. Performances on simulator and da Vinci robot on subjects with and without surgical background.

    Science.gov (United States)

    Moglia, Andrea; Ferrari, Vincenzo; Melfi, Franca; Ferrari, Mauro; Mosca, Franco; Cuschieri, Alfred; Morelli, Luca

    2017-08-17

    To assess whether previous training in surgery influences performance on da Vinci Skills Simulator and da Vinci robot. In this prospective study, thirty-seven participants (11 medical students, 17 residents, and 9 attending surgeons) without previous experience in laparoscopy and robotic surgery performed 26 exercises at da Vinci Skills Simulator. Thirty-five then executed a suture using a da Vinci robot. The overall scores on the exercises at the da Vinci Skills Simulator show a similar performance among the groups with no statistically significant pair-wise differences (p robotic surgery, insignificant differences in the scores at the da Vinci Skills Simulator and at the da Vinci robot on inanimate models.

  7. Cultural performances: the zombie invasion, the death of the subject and other disorientation

    Directory of Open Access Journals (Sweden)

    Sainy C.B. Veloso

    2013-06-01

    Full Text Available The article considers how contemporary cultural performances indicial, the worldwide proliferation of fictional theme of the zombie apocalypse, through comic books, board games, movies, games, television serials, posters, rallies. Since then, reflects the theme and looks at this set of products and actions, limited the issue: the current crisis is a crisis of guidance within a world not interpretable, as demonstrates the zombie invasion? To this end, rests on concepts of cultural performances delimiters (GOFFMAN, 2011; social drama (TURNER, 1974; culture (GEERTZ, 1989; and social crisis (JAMESON, 1997; SENNETT, 1998.

  8. A unified model of non-profit sport organizations performance

    NARCIS (Netherlands)

    Manu Claessens; Erik Thibaut; Mathieu Winand; Jeroen Scheerder; Steven Vos

    2014-01-01

    Little consensus has emerged about how organizational performance should be defined and measured. Most studies have used traditional approaches to give their own perspective about organizational performance and effectiveness, but none have recently tried to encompass these different views into one

  9. Effect of simultaneous electrical and thermal treatment on the performance of bulk heterojunction organic solar cell blended with organic salt

    Energy Technology Data Exchange (ETDEWEB)

    Sabri, Nasehah Syamin; Yap, Chi Chin; Yahaya, Muhammad [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia); Salleh, Muhamad Mat [Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor (Malaysia)

    2013-11-27

    This work presents the influence of simultaneous electrical and thermal treatment on the performance of organic solar cell blended with organic salt. The organic solar cells were composed of indium tin oxide as anode, poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene]: (6,6)-phenyl-C61 butyric acid methyl ester: tetrabutylammonium hexafluorophosphate blend as organic active layer and aluminium as cathode. The devices underwent a simultaneous fixed-voltage electrical and thermal treatment at different temperatures of 25, 50 and 75 °C. It was found that photovoltaic performance improved with the thermal treatment temperature. Accumulation of more organic salt ions in the active layer leads to broadening of p-n doped regions and hence higher built-in electric field across thin intrinsic layer. The simultaneous electrical and thermal treatment has been shown to be able to reduce the electrical treatment voltage.

  10. A Two-Step Method to Identify Positive Deviant Physician Organizations of Accountable Care Organizations with Robust Performance Management Systems.

    Science.gov (United States)

    Pimperl, Alexander F; Rodriguez, Hector P; Schmittdiel, Julie A; Shortell, Stephen M

    2017-04-06

    To identify positive deviant (PD) physician organizations of Accountable Care Organizations (ACOs) with robust performance management systems (PMSYS). Third National Survey of Physician Organizations (NSPO3, n = 1,398). Organizational and external factors from NSPO3 were analyzed. Linear regression estimated the association of internal and contextual factors on PMSYS. Two cutpoints (75th/90th percentiles) identified PDs with the largest residuals and highest PMSYS scores. A total of 65 and 41 PDs were identified using 75th and 90th percentiles cutpoints, respectively. The 90th percentile more strongly differentiated PDs from non-PDs. Having a high proportion of vulnerable patients appears to constrain PMSYS development. Our PD identification method increases the likelihood that PD organizations selected for in-depth inquiry are high-performing organizations that exceed expectations. © Health Research and Educational Trust.

  11. Validation of a novel automatic sleep spindle detector with high performance during sleep in middle aged subjects

    DEFF Research Database (Denmark)

    Wendt, Sabrina Lyngbye; Christensen, Julie A. E.; Kempfner, Jacob

    2012-01-01

    Many of the automatic sleep spindle detectors currently used to analyze sleep EEG are either validated on young subjects or not validated thoroughly. The purpose of this study is to develop and validate a fast and reliable sleep spindle detector with high performance in middle aged subjects....... An automatic sleep spindle detector using a bandpass filtering approach and a time varying threshold was developed. The validation was done on sleep epochs from EEG recordings with manually scored sleep spindles from 13 healthy subjects with a mean age of 57.9 ± 9.7 years. The sleep spindle detector reached...... a mean sensitivity of 84.6 % and a mean specificity of 95.3 %. The sleep spindle detector can be used to obtain measures of spindle count and density together with quantitative measures such as the mean spindle frequency, mean spindle amplitude, and mean spindle duration....

  12. Structural Performance of a Hybrid FRP-Aluminum Modular Triangular Truss System Subjected to Various Loading Conditions

    Directory of Open Access Journals (Sweden)

    Dongdong Zhang

    2014-01-01

    Full Text Available A novel hybrid FRP-aluminum truss system has been employed in a two-rut modular bridge superstructure composed of twin inverted triangular trusses. The actual flexural behavior of a one-rut truss has been previously investigated under the on-axis loading test; however, the structural performance of the one-rut truss subjected to an off-axis load is still not fully understood. In this paper, a geometrical linear finite element model is introduced and validated by the on-axis loading test; the structural performance of the one-rut truss subjected to off-axis load was numerically obtained; the dissimilarities of the structural performance between the two different loading cases are investigated in detail. The results indicated that (1 the structural behavior of the off-axis load differs from that of the on-axis load, and the off-axis load is the critical loading condition controlling the structural performance of the triangular truss; (2 under the off-axis load, the FRP trussed members and connectors bear certain out-of-plane bending moments and are subjected to a complicated stress state; and (3 the stress state of these members does not match that of the initial design, and optimization for the redesign of these members is needed, especially for the pretightened teeth connectors.

  13. A within-subjects comparison of learning and memory performance before and after cardiac catheterization.

    NARCIS (Netherlands)

    Verwey, B.; Derikx, R.L.; Waarde, J.A. van; Essink, G.; Rooij, I.A.L.M. van; Zitman, F.G.

    2007-01-01

    OBJECTIVE: To investigate the influence of stress on the recall of neutral information in a clinical setting, a prospective study was performed on patients who were admitted to the hospital for cardiac catheterization. METHODS: During their hospital stay, 39 cardiac patients were tested for verbal

  14. Clearing the air : The effect of experimenter race on target's test performance and subjective experience

    NARCIS (Netherlands)

    Marx, DM; Goff, PA

    2005-01-01

    According to stereotype threat theory (Steele, 1997), stereotyped targets under-perform on challenging tests, in part because they are worried about being viewed in terms of the negative stereotype that they are intellectually inferior. How then are the negative effects of stereotype threat reduced

  15. Executive Functions in Older Adults With Autism Spectrum Disorder : Objective Performance and Subjective Complaints

    NARCIS (Netherlands)

    Davids, Roeliena C. D.; Groen, Yvonne; Berg, Ina J.; Tucha, Oliver M.; van Balkom, Ingrid D. C.

    Although deficits in Executive Functioning (EF) are reported frequently in young individuals with Autism Spectrum Disorders (ASD), they remain relatively unexplored later in life (> 50 years). We studied objective performance on EF measures (Tower of London, Zoo map, phonetic/semantic fluency) as

  16. International Differences in Subjective Performance Evaluation, Compensation and Career Dynamics in a Global Company

    DEFF Research Database (Denmark)

    Halse, Nikolaj; Smeets, Valerie Anne Rolande; Warzynski, Frederic Michel Patrick

    .S. and Asia (Japan and China). We try to understand why performance evaluation is distributed differently across countries, and how these differences affect wage growth, the size of the bonus and promotion decisions. We find that evaluations tend to be better on average at the headquarter, but also that wages...

  17. First year medical students' learning style preferences and their correlation with performance in different subjects within the medical course.

    Science.gov (United States)

    Hernández-Torrano, Daniel; Ali, Syed; Chan, Chee-Kai

    2017-08-08

    Students commencing their medical training arrive with different educational backgrounds and a diverse range of learning experiences. Consequently, students would have developed preferred approaches to acquiring and processing information or learning style preferences. Understanding first-year students' learning style preferences is important to success in learning. However, little is understood about how learning styles impact learning and performance across different subjects within the medical curriculum. Greater understanding of the relationship between students' learning style preferences and academic performance in specific medical subjects would be valuable. This cross-sectional study examined the learning style preferences of first-year medical students and how they differ across gender. This research also analyzed the effect of learning styles on academic performance across different subjects within a medical education program in a Central Asian university. A total of 52 students (57.7% females) from two batches of first-year medical school completed the Index of Learning Styles Questionnaire, which measures four dimensions of learning styles: sensing-intuitive; visual-verbal; active-reflective; sequential-global. First-year medical students reported preferences for visual (80.8%) and sequential (60.5%) learning styles, suggesting that these students preferred to learn through demonstrations and diagrams and in a linear and sequential way. Our results indicate that male medical students have higher preference for visual learning style over verbal, while females seemed to have a higher preference for sequential learning style over global. Significant associations were found between sensing-intuitive learning styles and performance in Genetics [β = -0.46, B = -0.44, p styles and performance in Genetics [β = 0.36, B = 0.43, p learning techniques. Instructors can also benefit by modifying and adapting more appropriate teaching approaches in these

  18. Magnetic field enhancement of organic photovoltaic cells performance

    OpenAIRE

    Oviedo-Casado, S.; Urbina, A.; Prior, J.

    2017-01-01

    Charge separation is a critical process for achieving high efficiencies in organic photovoltaic cells. The initial tightly bound excitonic electron-hole pair has to dissociate fast enough in order to avoid photocurrent generation and thus power conversion efficiency loss via geminate recombination. Such process takes place assisted by transitional states that lie between the initial exciton and the free charge state. Due to spin conservation rules these intermediate charge transfer states typ...

  19. The prefrontal model revisited: double dissociations between young sleep deprived and elderly subjects on cognitive components of performance.

    Science.gov (United States)

    Tucker, Adrienne M; Stern, Yaakov; Basner, Robert C; Rakitin, Brian C

    2011-08-01

    The prefrontal model suggests that total sleep deprivation (TSD) and healthy aging produce parallel cognitive deficits. Here we decompose global performance on two common tasks into component measures of specific cognitive processes to pinpoint the source of impairments in elderly and young TSD participants relative to young controls and to each other. The delayed letter recognition task (DLR) was performed in 3 studies. The psychomotor vigilance task (PVT) was performed in 1 of the DLR studies and 2 additional studies. For DLR, young TSD (n=20, age=24.60 ± 0.62 years) and young control (n=17, age=24.00 ± 2.42); elderly (n=26, age=69.92 ± 1.06). For the PVT, young TSD (n=18, age=26.65 ± 4.57) and young control (n=16, age=25.19 ± 2.90); elderly (n=21, age=71.1 ± 4.92). Both elderly and young TSD subjects displayed impaired reaction time (RT), our measure of global performance, on both tasks relative to young controls. After decomposing global performance on the DLR, however, a double dissociation was observed as working memory scanning speed was impaired only in elderly subjects while other components of performance were impaired only by TSD. Similarly, for the PVT a second double dissociation was observed as vigilance impairments were present only in TSD while short-term response preparation effects were altered only in the elderly. The similarity between TSD and the elderly in impaired performance was evident only when examining global RT. In contrast, when specific cognitive components were examined double dissociations were observed between TSD and elderly subjects. This demonstrates the heterogeneity in those cognitive processes impaired in TSD versus the elderly.

  20. The impact of sleep duration and subject intelligence on declarative and motor memory performance: how much is enough?

    Science.gov (United States)

    Tucker, Matthew A; Fishbein, William

    2009-09-01

    Recent findings clearly demonstrate that daytime naps impart substantial memory benefits compared with equivalent periods of wakefulness. Using a declarative paired associates task and a procedural motor sequence task, this study examined the effect of two lengthier durations of nocturnal sleep [either a half night (3.5 h) or a full night (7.5 h) of sleep] on over-sleep changes in memory performance. We also assessed whether subject intelligence is associated with heightened task acquisition and, more importantly, whether greater intelligence translates to greater over-sleep declarative and procedural memory enhancement. Across both tasks, we demonstrate that postsleep performance gains are nearly equivalent, regardless of whether subjects obtain a half night or a full night of sleep. Remarkably, the over-sleep memory changes observed on both tasks are very similar to findings from studies examining performance following a daytime nap. Consistent with previous research, we also observed a strong positive correlation between amount of Stage 2 sleep and motor skill performance in the full-night sleep group. This finding contrasts with a highly significant correlation between spectral power in the spindle frequency band (12-15 Hz) and motor skill enhancement only in the half-night group, suggesting that sigma power and amount of Stage 2 sleep are both important for optimal motor memory processing. While subject intelligence correlated positively with acquisition and retest performance on both tasks, it did not correlate with over-sleep changes in performance on either task, suggesting that intelligence may not be a powerful modulator of sleep's effect on memory performance.

  1. Objective vs. Subjective Evaluation of Cognitive Performance During 0.4-MPa Dives Breathing Air or Nitrox.

    Science.gov (United States)

    Germonpré, Peter; Balestra, Costantino; Hemelryck, Walter; Buzzacott, Peter; Lafère, Pierre

    2017-05-01

    Divers try to limit risks associated with their sport, for instance by breathing enriched air nitrox (EANx) instead of air. This double blinded, randomized trial was designed to see if the use of EANx could effectively improve cognitive performance while diving. Eight volunteers performed two no-decompression dry dives breathing air or EANx for 20 min at 0.4 MPa. Cognitive functions were assessed with a computerized test battery, including MathProc and Ptrail. Measurements were taken before the dive, upon arrival and after 15 min at depth, upon surfacing, and at 30 min postdive. After each dive subjects were asked to identify the gas they had just breathed. Identification of the breathing gas was not possible on subjective assessment alone, while cognitive assessments showed significantly better performance while breathing EANx. Before the dives, breathing air, mean time to complete the task was 1795 ms for MathProc and 1905 ms for Ptrail. When arriving at depth MathProc took 1616 ms on air and 1523 ms on EANx, and Ptrail took 1318 ms on air and and 1356 ms on EANx, followed 15 min later by significant performance inhibition while breathing air during the ascent and the postdive phase, supporting the concept of late dive/postdive impairment. The results suggest that EANx could protect against decreased neuro-cognitive performance induced by inert gas narcosis. It was not possible for blinded divers to identify which gas they were breathing and differences in postdive fatigue between air and EANx diving deserve further investigation.Germonpré P, Balestra C, Hemelryck W, Buzzacott P, Lafère P. Objective vs. subjective evaluation of cognitive performance during 0.4-MPa dives breathing air or nitrox. Aerosp Med Hum Perform. 2017; 88(5):469-475.

  2. Organization of Language Behavior and Cognitive Performance in Chronic Schizophrenia

    Science.gov (United States)

    Grand, Stanley; And Others

    1975-01-01

    The present study reports data obtained from chronic schizophrenic patients which relate formal categories of language behavior to performance on the Stroop Color-Word Interference Test--a task of verbal encoding under distracting and nondistracting conditions. (Editor)

  3. Where next? Research directions on performance in public organizations

    NARCIS (Netherlands)

    Boyne, George A.; O'Toole, Laurence J.; Meier, Kenneth J.; Walker, Richard M.

    2005-01-01

    The dependent variable in all the articles presented in this symposium issue of JPART was organizational performance in public agencies. Management variables included organizational strategy, resources, leadership, goals, workforce diversity, and representation. The empirical articles also

  4. Effects of Background Music on Objective and Subjective Performance Measures in an Auditory BCI

    OpenAIRE

    Zhou, Sijie; Allison, Brendan Z.; Kübler, Andrea; Cichocki, Andrzej; Wang, Xingyu; Jin, Jing

    2016-01-01

    Several studies have explored brain computer interface (BCI) systems based on auditory stimuli, which could help patients with visual impairments. Usability and user satisfaction are important considerations in any BCI. Although background music can influence emotion and performance in other task environments, and many users may wish to listen to music while using a BCI, auditory, and other BCIs are typically studied without background music. Some work has explored the possibility of using po...

  5. Comparison of design procedures and observed performance of bridges subjected to lateral spreading

    OpenAIRE

    Turner, Benjamin J; Brandenberg, Scott J.; Stewart, Jonathan P.

    2014-01-01

    Recently developed guidelines for analyzing deep foundations in liquefiable soils are compared with the performance of a highway bridge and adjacent railroad bridge that suffered damage during the 2010 Mw 7.2 El Mayor-Cucapah earthquake in Baja California, Mexico. A span of the pile-supported railroad bridge collapsed due to movement of a pier from lateral spreading. The highway bridge, supported on drilled shafts, suffered moderate structural damage but did not collapse. An overview of the s...

  6. Subjective cognitive complaints and neuropsychological performance in former smokers with and without chronic obstructive pulmonary disease.

    Science.gov (United States)

    Brunette, Amanda M; Holm, Kristen E; Wamboldt, Frederick S; Kozora, Elizabeth; Moser, David J; Make, Barry J; Crapo, James D; Meschede, Kimberly; Weinberger, Howard D; Moreau, Kerrie L; Bowler, Russell P; Hoth, Karin F

    2017-08-02

    This study examined the association of perceived cognitive difficulties with objective cognitive performance in former smokers. We hypothesized that greater perceived cognitive difficulties would be associated with poorer performance on objective executive and memory tasks. Participants were 95 former smokers recruited from the COPDGene study. They completed questionnaires (including the Cognitive Difficulties Scale [CDS] and the Hospital Anxiety and Depression Scale [HADS]), neuropsychological assessment, and pulmonary function testing. Pearson correlations and t-tests were conducted to examine the bivariate association of the CDS (total score and subscales for attention/concentration, praxis, delayed recall, orientation for persons, temporal orientation, and prospective memory) with each domain of objective cognitive functioning (memory recall, executive functioning/processing speed, visuospatial processing, and language). Simultaneous multiple linear regression was used to further examine all statistically significant bivariate associations. The following covariates were included in all regression models: age, sex, pack-years, premorbid functioning (WRAT-IV Reading), HADS total score, and chronic obstructive pulmonary disease (COPD) status (yes/no based on GOLD criteria). In regression models, greater perceived cognitive difficulties overall (using CDS total score) were associated with poorer performance on executive functioning/processing speed tasks (b = -0.07, SE = 0.03, p = .037). Greater perceived cognitive difficulties on the CDS praxis subscale were associated with poorer performance on executive functioning/processing speed tasks (b = -3.65, SE = 1.25, p = .005), memory recall tasks (b = -4.60, SE = 1.75, p = .010), and language tasks (b = -3.89, SE = 1.39, p = .006). Clinicians should be aware that cognitive complaints may be indicative of problems with the executive functioning/processing speed and memory of former smokers with

  7. Effects of the handle diameter and tip angle of chopsticks on the food-serving performance of male subjects.

    Science.gov (United States)

    Wu, S P

    1995-12-01

    The effects of chopsticks handle diameter and tip angle on the food-serving performance of pinching food, pulling food, shearing food and thrusting food, were investigated in this study. A total of 24 male subjects was tested using 12 pairs of experimental chopsticks, consisting of three types of different handle diameters and four types of different tip angles. These results indicated that chopstick handle diameter and tip angle have a significant influence on eating efficiency, and that these two variables have a significant interaction. In addition, chopstick tip diameter also had significant effects on performance at the four tasks and subjective ratings. Generally, according to the results, when the chopsticks design is presented in terms of handle diameter, tip angle and tip diameter, a pair of chopsticks with 6 mm handle diameter x 2 degrees tip angle x 4 mm tip diameter would be optimum.

  8. Medical Student Dissection of Cadavers Improves Performance on Practical Exams but not on the NBME Anatomy Subject Exam

    OpenAIRE

    Sargent Jones, Leslie; Paulman, Lance E.; Thadani, Raj; Terracio, Louis

    2009-01-01

    We have examined whether cadaver dissection by first year medical students (MIs) affected their performance in two test measures: the NBME Gross Anatomy and Embryology Subject Exam (dissection-relevant questions only), and practical exams given at the end of each major section within the course. The dissections for the entire course were divided into 18 regional dissection units and each student was assigned to dissect one third of the regional units; the other two-thirds of the material was ...

  9. Performance Measures for Edge Organizations: A Preliminary Report

    Science.gov (United States)

    2008-03-06

    sufficiently reducing  uncertainty about alternatives  to make a reasonable choice  from among them. The  completeness of  apriori   information, which...reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of...Desouza (2006b), an agile organization will be able to (1) sense signals ( data ) in the environment, (2) process (construct information) them adequately

  10. Functional knee brace use by non-injured subjects while performing an anaerobic capacity task: preliminary study.

    Science.gov (United States)

    Rishiraj, N; Taunton, J E; Lloyd-Smith, R; Niven, B; Regan, W; Woollard, R

    2010-12-01

    The objective of this paper was to investigate if performance was hindered in non-injured braced athletes during an anaerobic task. If performance was affected, could accommodation to wearing a knee brace occur and thus decreasing performance hindrance concern while using a functional knee brace (FKB). A 2x3 non-braced (NBr) and braced repeated measure factorial design. Five healthy athletes completed all testing. Subjects performed the Repeated High Intensity Shuttle Test (RHIST) over six days (three days NBr and three days braced). Running times were recorded each testing day to determine performance measures and percent fatigue levels while using a FKB and if accommodation to FKB use was possible. Non significant (F1,4=1.42, P=0.299) faster group mean performance time, was recorded for braced subjects relative to the non-braced condition. Although relatively faster performance levels were noted during the braced testing conditions during days 1 and 3 compared to the non-braced condition, these results were also not significant (F2,8=2.82, P=0.118). Lower percent fatigue level was recorded during all three braced days compared to non-braced days. Further, a tendency for accommodation to knee brace trend use was noted as the percentage performance difference between the two conditions had decreased by the last day of testing. Use of a knee brace did not hinder performance once accommodation to using the knee brace occurred and fatigue was not a factor while using a knee brace. Additional research, using a larger sample size and longer testing duration, is required to confirm the potential accommodation trend.

  11. Cardiopulmonary performance testing using a robotics-assisted tilt table: feasibility assessment in able-bodied subjects.

    Science.gov (United States)

    Saengsuwan, J; Laubacher, M; Nef, T; Hunt, K J

    2014-01-01

    Robotics-assisted tilt table technology was introduced for early rehabilitation of neurological patients. It provides cyclical stepping movement and physiological loading of the legs. The aim of the present study was to assess the feasibility of this type of device for peak cardiopulmonary performance testing using able-bodied subjects. A robotics-assisted tilt table was augmented with force sensors in the thigh cuffs and a work rate estimation algorithm. A custom visual feedback system was employed to guide the subjects' work rate and to provide real time feedback of actual work rate. Feasibility assessment focused on: (i) implementation (technical feasibility), and (ii) responsiveness (was there a measurable, high-level cardiopulmonary reaction?). For responsiveness testing, each subject carried out an incremental exercise test to the limit of functional capacity with a work rate increment of 5 W/min in female subjects and 8 W/min in males. 11 able-bodied subjects were included (9 male, 2 female; age 29.6 ± 7.1 years: mean ± SD). Resting oxygen uptake (O_{2}) was 4.6 ± 0.7 mL/min/kg and O_{2}peak was 32.4 ± 5.1 mL/min/kg; this mean O_{2}peak was 81.1% of the predicted peak value for cycle ergometry. Peak heart rate (HRpeak) was 177.5 ± 9.7 beats/min; all subjects reached at least 85% of their predicted HRpeak value. Respiratory exchange ratio (RER) at O_{2}peak was 1.02 ± 0.07. Peak work rate) was 61.3 ± 15.1 W. All subjects reported a Borg CR10 value for exertion and leg fatigue of 7 or more. The robotics-assisted tilt table is deemed feasible for peak cardiopulmonary performance testing: the approach was found to be technically implementable and substantial cardiopulmonary responses were observed. Further testing in neurologically-impaired subjects is warranted.

  12. School Achievement and Performance in Chilean High Schools: The Mediating Role of Subjective Wellbeing in School-Related Evaluations

    Directory of Open Access Journals (Sweden)

    Verónica López

    2017-07-01

    Full Text Available School achievement gaps and school failure are problematic issues in Latin America, and are mainly explained by the socio-economic status (SES of the students. What schools can do to improve school achievement and reduce school failure is a critical issue, both for school management and teacher training. In this study, we present the association of individual and school-related socio-emotional variables with school achievement and performance, controlling for the effects of SES. A probabilistic sample of 4,964 students, drawn from 191 schools enrolled in year 10 in urban areas of Chile, answered questionnaires assessing subjective wellbeing, social wellbeing in school, school climate, school social wellbeing and students’ perceptions of teachers’ wellbeing. Using structural equation modeling, and controlling for SES, we modeled subjective wellbeing as a mediator of the relationship between school-related variables, such as school climate and perception of teacher’s wellbeing, and (a school achievement, and (b school performance. School achievement was computed as a product of (a the probability of passing the school year, and (b the percentage of yearly attendance at school. Data on school achievement was drawn from administrative registries from the Chilean Ministry of Education. School performance was computed as the estimated grade point average (GPA at the end of the school year, based on the students’ previous 5-year GPAs, and was also obtained through administrative data of the last 5 years. Findings reveal the mediating role of subjective wellbeing in the relationship between school-related evaluations (students’ social wellbeing at school, their perception of teachers’ wellbeing and school climate and school achievement. For school achievement, two variables were mediated (students’ social wellbeing at school and school climate. However, for school performance, no significant mediations were found. We conclude that, on the

  13. School Achievement and Performance in Chilean High Schools: The Mediating Role of Subjective Wellbeing in School-Related Evaluations

    Science.gov (United States)

    López, Verónica; Oyanedel, Juan C.; Bilbao, Marian; Torres, Javier; Oyarzún, Denise; Morales, Macarena; Ascorra, Paula; Carrasco, Claudia

    2017-01-01

    School achievement gaps and school failure are problematic issues in Latin America, and are mainly explained by the socio-economic status (SES) of the students. What schools can do to improve school achievement and reduce school failure is a critical issue, both for school management and teacher training. In this study, we present the association of individual and school-related socio-emotional variables with school achievement and performance, controlling for the effects of SES. A probabilistic sample of 4,964 students, drawn from 191 schools enrolled in year 10 in urban areas of Chile, answered questionnaires assessing subjective wellbeing, social wellbeing in school, school climate, school social wellbeing and students’ perceptions of teachers’ wellbeing. Using structural equation modeling, and controlling for SES, we modeled subjective wellbeing as a mediator of the relationship between school-related variables, such as school climate and perception of teacher’s wellbeing, and (a) school achievement, and (b) school performance. School achievement was computed as a product of (a) the probability of passing the school year, and (b) the percentage of yearly attendance at school. Data on school achievement was drawn from administrative registries from the Chilean Ministry of Education. School performance was computed as the estimated grade point average (GPA) at the end of the school year, based on the students’ previous 5-year GPAs, and was also obtained through administrative data of the last 5 years. Findings reveal the mediating role of subjective wellbeing in the relationship between school-related evaluations (students’ social wellbeing at school, their perception of teachers’ wellbeing and school climate) and school achievement. For school achievement, two variables were mediated (students’ social wellbeing at school and school climate). However, for school performance, no significant mediations were found. We conclude that, on the one hand

  14. School Achievement and Performance in Chilean High Schools: The Mediating Role of Subjective Wellbeing in School-Related Evaluations.

    Science.gov (United States)

    López, Verónica; Oyanedel, Juan C; Bilbao, Marian; Torres, Javier; Oyarzún, Denise; Morales, Macarena; Ascorra, Paula; Carrasco, Claudia

    2017-01-01

    School achievement gaps and school failure are problematic issues in Latin America, and are mainly explained by the socio-economic status (SES) of the students. What schools can do to improve school achievement and reduce school failure is a critical issue, both for school management and teacher training. In this study, we present the association of individual and school-related socio-emotional variables with school achievement and performance, controlling for the effects of SES. A probabilistic sample of 4,964 students, drawn from 191 schools enrolled in year 10 in urban areas of Chile, answered questionnaires assessing subjective wellbeing, social wellbeing in school, school climate, school social wellbeing and students' perceptions of teachers' wellbeing. Using structural equation modeling, and controlling for SES, we modeled subjective wellbeing as a mediator of the relationship between school-related variables, such as school climate and perception of teacher's wellbeing, and (a) school achievement, and (b) school performance. School achievement was computed as a product of (a) the probability of passing the school year, and (b) the percentage of yearly attendance at school. Data on school achievement was drawn from administrative registries from the Chilean Ministry of Education. School performance was computed as the estimated grade point average (GPA) at the end of the school year, based on the students' previous 5-year GPAs, and was also obtained through administrative data of the last 5 years. Findings reveal the mediating role of subjective wellbeing in the relationship between school-related evaluations (students' social wellbeing at school, their perception of teachers' wellbeing and school climate) and school achievement. For school achievement, two variables were mediated (students' social wellbeing at school and school climate). However, for school performance, no significant mediations were found. We conclude that, on the one hand, after

  15. Eccentric training for shoulder abductors improves pain, function and isokinetic performance in subjects with shoulder impingement syndrome: a case series.

    Science.gov (United States)

    Camargo, Paula R; Avila, Mariana A; Alburquerque-Sendín, Francisco; Asso, Naoe A; Hashimoto, Larissa H; Salvini, Tania F

    2012-01-01

    Conservative treatments have been proposed for people with shoulder impingement syndrome (SIS), such as strengthening of the rotator cuff and scapular muscles and stretching of the soft tissues of the shoulder. However, there is a lack of studies analyzing the effectiveness of eccentric training in the treatment of SIS. To evaluate the effects of eccentric training for shoulder abductors on pain, function, and isokinetic performance during concentric and eccentric abduction of the shoulder in subjects with SIS. Twenty subjects (7 females, 34.2 SD 10.2 years, 1.7 SD 0.1 m, 78.0 SD 16.3 kg) with unilateral SIS completed the study protocol. Bilateral isokinetic eccentric training at 60º/s for shoulder abductors was performed for six consecutive weeks, twice a week, on alternate days. For each training day, three sets of 10 repetitions were performed with a 3-minute rest period between the sets for each side. The range of motion trained was 60° (ranging from 80° to 20°). The Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire was used to evaluate functional status and symptoms of the upper limbs. Peak torque, total work and acceleration time were measured during concentric and eccentric abduction of the arm at 60º/s and 180º/s using an isokinetic dynamometer. DASH scores, peak torque, total work and acceleration time improved (pshoulder abductors improves physical function of the upper limbs in subjects with SIS.

  16. Trajectories in glycemic control over time are associated with cognitive performance in elderly subjects with type 2 diabetes.

    Science.gov (United States)

    Ravona-Springer, Ramit; Heymann, Anthony; Schmeidler, James; Moshier, Erin; Godbold, James; Sano, Mary; Leroith, Derek; Johnson, Sterling; Preiss, Rachel; Koifman, Keren; Hoffman, Hadas; Silverman, Jeremy M; Beeri, Michal Schnaider

    2014-01-01

    To study the relationships of long-term trajectories of glycemic control with cognitive performance in cognitively normal elderly with type 2 diabetes (T2D). Subjects (n = 835) pertain to a diabetes registry (DR) established in 1998 with an average of 18 HbA1c measurements per subject, permitting identification of distinctive trajectory groups of HbA1c and examining their association with cognitive function in five domains: episodic memory, semantic categorization, attention/working memory, executive function, and overall cognition. Analyses of covariance compared cognitive function among the trajectory groups adjusting for sociodemographic, cardiovascular, diabetes-related covariates and depression. Subjects averaged 72.8 years of age. Six trajectories of HbA1c were identified, characterized by HbA1c level at entry into the DR (Higher/Lower), and trend over time (Stable/Decreasing/Increasing). Both groups with a trajectory of decreasing HbA1c levels had high HbA1c levels at entry into the DR (9.2%, 10.7%), and high, though decreasing, HbA1c levels over time. They had the worst cognitive performance, particularly in overall cognition (pperformed best in cognitive tests. Glycemic control trajectories, which better reflect chronicity of T2D than a single HbA1c measurement, predict cognitive performance. A trajectory of stable HbA1c levels over time is associated with better cognitive function.

  17. Technological Innovation Management and its Role in Performance of Organizations

    Directory of Open Access Journals (Sweden)

    Laura-Diana Radu

    2012-10-01

    Full Text Available This paper aims to identify the main benefits of technological innovation in organizations and how it should be managed to ensure economic efficiency. The current level of social and economic evolution was possible only through active involvement of individuals and organizations in the innovative process. Adoption of appropriate policies and strategies at institutional, national and international level has significant impact on both the innovation process and innovation results. At company level, involvement in an innovative process depends on the financial and human resources and on the availability and interest of management and employees. The main motivating factor in adoption of technological innovation is, most often, obtaining financial benefits. This reflects itself either as a direct increase in profits, or by obtaining competitive advantage which leads, in the long run, to profits increase and achieving a favorable position on the market. Should not be neglected other motivating factors of innovation, such as compliance with environmental standards, ensuring a secure position on the market with opportunities for further expansion, reducing the cost of raw materials and / or production process, improving company image, attitude and achievements of partners in the field (competitors, suppliers, customers etc. Managers need to carefully analyze these factors and decide the manner and degree of involvement in an innovative process.

  18. Magnetic field enhancement of organic photovoltaic cells performance.

    Science.gov (United States)

    Oviedo-Casado, S; Urbina, A; Prior, J

    2017-06-27

    Charge separation is a critical process for achieving high efficiencies in organic photovoltaic cells. The initial tightly bound excitonic electron-hole pair has to dissociate fast enough in order to avoid photocurrent generation and thus power conversion efficiency loss via geminate recombination. Such process takes place assisted by transitional states that lie between the initial exciton and the free charge state. Due to spin conservation rules these intermediate charge transfer states typically have singlet character. Here we propose a donor-acceptor model for a generic organic photovoltaic cell in which the process of charge separation is modulated by a magnetic field which tunes the energy levels. The impact of a magnetic field is to intensify the generation of charge transfer states with triplet character via inter-system crossing. As the ground state of the system has singlet character, triplet states are recombination-protected, thus leading to a higher probability of successful charge separation. Using the open quantum systems formalism we demonstrate that the population of triplet charge transfer states grows in the presence of a magnetic field, and discuss the impact on carrier population and hence photocurrent, highlighting its potential as a tool for research on charge transfer kinetics in this complex systems.

  19. Medicare health maintenance organization benefits packages and plan performance measures.

    Science.gov (United States)

    Cox, Don; Lanyi, Bettina; Strabic, Allison

    2002-01-01

    This article reports the results of an analysis of the relationship between supplemental benefits offered by Medicare+Choice (M+C) plans and their plan performance ratings. We examined two measures of plan performance: (1) plan ratings as reported in the Medicare Managed Care (MMC) Consumer Assessment of Health Care Study (CAHPS), and (2) disenrollment rates. The results of our analysis indicated that variations in plan supplemental offerings have little impact on enrollees' plan performance ratings--both overall ratings and access to care measures. Furthermore, disenrollment rates were found to be more sensitive to the availability of alternative M+C plans, either in general, or for specific benefits than to variations in benefit offerings.

  20. Concept mapping improves academic performance in problem solving questions in biochemistry subject.

    Science.gov (United States)

    Baig, Mukhtiar; Tariq, Saba; Rehman, Rehana; Ali, Sobia; Gazzaz, Zohair J

    2016-01-01

    To assess the effectiveness of concept mapping (CM) on the academic performance of medical students' in problem-solving as well as in declarative knowledge questions and their perception regarding CM. The present analytical and questionnaire-based study was carried out at Bahria University Medical and Dental College (BUMDC), Karachi, Pakistan. In this analytical study, students were assessed with problem-solving questions (A-type MCQs), and declarative knowledge questions (short essay questions), and 50% of the questions were from the topics learned by CM. Students also filled a 10-item, 3-point Likert scale questionnaire about their perception regarding the effectiveness of the CM approach, and two open-ended questions were also asked. There was a significant difference in the marks obtained in those problem-solving questions, which were learned by CM as compared to those topics which were taught by the traditional lectures (pstudents' perception regarding CM showed that majority of the students perceive that CM is a helpful technique and it is enjoyed by the students. In open-ended questions, the majority of the students commented positively about the effectiveness of CM. Our results indicate that CM improves academic performance in problem solving but not in declarative knowledge questions. Students' perception about the effectiveness of CM was overwhelmingly positive.

  1. Concept mapping improves academic performance in problem solving questions in biochemistry subject

    Science.gov (United States)

    Baig, Mukhtiar; Tariq, Saba; Rehman, Rehana; Ali, Sobia; Gazzaz, Zohair J

    2016-01-01

    Objective: To assess the effectiveness of concept mapping (CM) on the academic performance of medical students’ in problem-solving as well as in declarative knowledge questions and their perception regarding CM. Methods: The present analytical and questionnaire-based study was carried out at Bahria University Medical and Dental College (BUMDC), Karachi, Pakistan. In this analytical study, students were assessed with problem-solving questions (A-type MCQs), and declarative knowledge questions (short essay questions), and 50% of the questions were from the topics learned by CM. Students also filled a 10-item, 3-point Likert scale questionnaire about their perception regarding the effectiveness of the CM approach, and two open-ended questions were also asked. Results: There was a significant difference in the marks obtained in those problem-solving questions, which were learned by CM as compared to those topics which were taught by the traditional lectures (p<0.001), while no significant difference was observed in marks in declarative knowledge questions (p=0.704). Analysis of students’ perception regarding CM showed that majority of the students perceive that CM is a helpful technique and it is enjoyed by the students. In open-ended questions, the majority of the students commented positively about the effectiveness of CM. Conclusion: Our results indicate that CM improves academic performance in problem solving but not in declarative knowledge questions. Students’ perception about the effectiveness of CM was overwhelmingly positive. PMID:27648017

  2. Performance of dairy cattle subjected to different food strategies during the growing and finishing phases

    Directory of Open Access Journals (Sweden)

    Marcondes Dias de Freitas Neto

    2014-09-01

    Full Text Available The objective of this study was to evaluate the performance of the crossbreed animals, in feedlot, previously fed with different supplemented energetic systems and Brachiaria brizantha pasture. The treatments were: TAA – high level intake of energy during the growing and finishing phases; TAM – high intake of energy during the growing phase and medium intake of energy during of the finishing phase; TMA – medium intake of energy during growing phase and high intake of energy during finishing phase; TMM – medium intake of energy during the growing and finishing phases. During the growth phase the animals received supplementation of 1.0% and 0.5% body weight of animals. In the finishing phase, the animals were fed diets containing 50% of concentrate (medium intake of energy, TDN = 71% or 80% of concentrate (high intake of energy, TDN = 80% in the dry matter of the total diet. The animals of the TAA and TAM treatments had higher average body weight at the beginning of feedlot due to that achieved average slaughter weights of 42 and 21 days less than the other treatments. The animals of the TAA and TAM treatments were more dry matter intake (P 0.05 between treatments for these measures at the end of the termination. The high level of energy supplementation during the growing phase allowed animals to a greater initial weight input in confinement, and consequently, the best performance.

  3. Artificial gait in complete spinal cord injured subjects: how to assess clinical performance

    Directory of Open Access Journals (Sweden)

    Karla Rocha Pithon

    2015-02-01

    Full Text Available Objective Adapt the 6 minutes walking test (6MWT to artificial gait in complete spinal cord injured (SCI patients aided by neuromuscular electrical stimulation. Method Nine male individuals with paraplegia (AIS A participated in this study. Lesion levels varied between T4 and T12 and time post injured from 4 to 13 years. Patients performed 6MWT 1 and 6MWT 2. They used neuromuscular electrical stimulation, and were aided by a walker. The differences between two 6MWT were assessed by using a paired t test. Multiple r-squared was also calculated. Results The 6MWT 1 and 6MWT 2 were not statistically different for heart rate, distance, mean speed and blood pressure. Multiple r-squared (r2 = 0.96 explained 96% of the variation in the distance walked. Conclusion The use of 6MWT in artificial gait towards assessing exercise walking capacity is reproducible and easy to apply. It can be used to assess SCI artificial gait clinical performance.

  4. Bright side of organizations: Cultura organizacional de elevada performance

    OpenAIRE

    Fernandes, Joana Veiga

    2017-01-01

    Dissertação de Mestrado apresentada no ISPA - Instituto Universitário para a obtenção de grau de Mestre na especialidade de Psicologia Social e das Organizações A presente investigação visa o desenvolvimento e validação de um modelo de Cultura Organizacional de Elevada Performance e compreender a sua relação com o Work Engagement e com o Compromisso Organizacional Afetivo. Para esse efeito hipotetizou-se que a Cultura Organizacional de Elevada Performance exerce um efeito positivo...

  5. Interaction between physiological and subjective states predicts the effect of a judging panel on the postures of cellists in performance

    Directory of Open Access Journals (Sweden)

    Satoshi eEndo

    2014-08-01

    Full Text Available This study investigated the effect of a panel of judges on the movements and postures of cellists in performance. 24 expert cellists played a short piece of music, to a metronome beat, in the presence and absence of the panel. Kinematic analyses showed that in the presence of the panel the temporal execution of left arm shifting movements became less variable and closer to the metronome beat. In contrast, the panel's presence had no reliable effect on their spatial accuracy. A detailed postural analysis indicated that left elbow angle during execution of a given high note was correlated with level of heart rate, though the nature of this correlation was systematically affected by the relevant participant's subjective state: if anxious, a higher heart rate correlated with a more flexed elbow, if not anxious then with a more extended elbow. Our results suggest a change in physiological state alone does not reliably predict a change in behaviour in performing cellists, which instead depends on the interaction between physiological state and subjective experience of anxiety. This highlights a need to distinguish performance anxiety from physiological arousal, to which end we advocate currency for the specific term performance arousal to describe heightened physiological activity in a performer.

  6. Performance indicators for participation in organized mammography screening

    DEFF Research Database (Denmark)

    von Euler-Chelpin, My Catarina; Jacobsen, Katja Kemp

    2012-01-01

    A population's acceptance of a screening programme is reflected by its participation. Participation can be measured by cross-section, in an individual screening round, or by cumulative examination rate, which covers participation in numerous rounds at a pre-specified frequency. To establish an in...... an informed overview of programme performance, the relationship between these measures was analysed....

  7. RADIATION PERFORMANCE OF GAN AND INAS/GAAS QUANTUM DOT BASED DEVICES SUBJECTED TO NEUTRON RADIATION

    Directory of Open Access Journals (Sweden)

    Dhiyauddin Ahmad Fauzi

    2017-05-01

    Full Text Available In addition to their useful optoelectronics functions, gallium nitride (GaN and quantum dots (QDs based structures are also known for their radiation hardness properties. With demands on such semiconductor material structures, it is important to investigate the differences in reliability and radiation hardness properties of these two devices. For this purpose, three sets of GaN light-emitting diode (LED and InAs/GaAs dot-in-a well (DWELL samples were irradiated with thermal neutron of fluence ranging from 3×1013 to 6×1014 neutron/cm2 in PUSPATI TRIGA research reactor. The radiation performances for each device were evaluated based on the current-voltage (I-V and capacitance-voltage (C-V electrical characterisation method. Results suggested that the GaN based sample is less susceptible to electrical changes due to the thermal neutron radiation effects compared to the QD based sample.

  8. Performance of asphaltic concrete incorporating styrene butadiene rubber subjected to varying aging condition

    Science.gov (United States)

    Salah, Faisal Mohammed; Jaya, Ramadhansyah Putra; Mohamed, Azman; Hassan, Norhidayah Abdul; Rosni, Nurul Najihah Mad; Mohamed, Abdullahi Ali; Agussabti

    2017-12-01

    The influence of styrene butadiene rubber (SBR) on asphaltic concrete properties at different aging conditions was presented in this study. These aging conditions were named as un-aged, short-term, and long-term aging. The conventional asphalt binder of penetration grade 60/70 was used in this work. Four different levels of SBR addition were employed (i.e., 0 %, 1 %, 3 %, and 5 % by binder weight). Asphalt concrete mixes were prepared at selected optimum asphalt content (5 %). The performance was evaluated based on Marshall Stability, resilient modulus, and dynamic creep tests. Results indicated the improving stability and permanent deformation characteristics that the mixes modified with SBR polymer have under aging conditions. The result also showed that the stability, resilient modulus, and dynamic creep tests have the highest rates compared to the short-term aging and un-aged samples. Thus, the use of 5 % SBR can produce more durable asphalt concrete mixtures with better serviceability.

  9. Using Performance Analysis for Training in an Organization Implementing ISO-9000 Manufacturing Practices: A Case Study.

    Science.gov (United States)

    Kunneman, Dale E.; Sleezer, Catherine M.

    2000-01-01

    This case study examines the application of the Performance Analysis for Training (PAT) Model in an organization that was implementing ISO-9000 (International Standards Organization) processes for manufacturing practices. Discusses the interaction of organization characteristics, decision maker characteristics, and analyst characteristics to…

  10. Effects of team-based learning on perceived teamwork and academic performance in a health assessment subject.

    Science.gov (United States)

    Park, Hyung-Ran; Kim, Chun-Ja; Park, Jee-Won; Park, Eunyoung

    2015-01-01

    The purpose of this study was to examine the effectiveness of team-based learning (a well-recognized learning and teaching strategy), applied in a health assessment subject, on nursing students' perceived teamwork (team-efficacy and team skills) and academic performance (individual and team readiness assurance tests, and examination scores). A prospective, one-group, pre- and post-test design enrolled a convenience sample of 74 second-year nursing students at a university in Suwon, Korea. Team-based learning was applied in a 2-credit health assessment subject over a 16-week semester. All students received written material one week before each class for readiness preparation. After administering individual- and team-readiness assurance tests consecutively, the subject instructor gave immediate feedback and delivered a mini-lecture to the students. Finally, students carried out skill based application exercises. The findings showed significant improvements in the mean scores of students' perceived teamwork after the introduction of team-based learning. In addition, team-efficacy was associated with team-adaptability skills and team-interpersonal skills. Regarding academic performance, team readiness assurance tests were significantly higher than individual readiness assurance tests over time. Individual readiness assurance tests were significantly related with examination scores, while team readiness assurance tests were correlated with team-efficacy and team-interpersonal skills. The application of team-based learning in a health assessment subject can enhance students' perceived teamwork and academic performance. This finding suggests that team-based learning may be an effective learning and teaching strategy for improving team-work of nursing students, who need to collaborate and effectively communicate with health care providers to improve patients' health.

  11. Formalizing Theatrical Performances Using Multi-Agent Organizations

    DEFF Research Database (Denmark)

    Jensen, Andreas Schmidt; Spurkeland, Johannes Svante; Villadsen, Jørgen

    2013-01-01

    Theatrical performances usually follow strict scripts and actors are not allowed to deviate. A Danish theatrical group, Theater 770◦ Celsius, has invented a new method called In Real Life, in which only certain events in the storyline are specified and the actors are supposed to improvise to reac...... these events. The method bears a resemblance to multi-agent systems and we show how it can be formalized using the multi-agent organizational model OperA....

  12. The effect of subjective awareness measures on performance in artificial grammar learning task.

    Science.gov (United States)

    Ivanchei, Ivan I; Moroshkina, Nadezhda V

    2018-01-01

    Systematic research into implicit learning requires well-developed awareness-measurement techniques. Recently, trial-by-trial measures have been widely used. However, they can increase complexity of a study because they are an additional experimental variable. We tested the effects of these measures on performance in artificial grammar learning study. Four groups of participants were assigned to different awareness measures conditions: confidence ratings, post-decision wagering, decision strategy attribution or none. Decision-strategy-attribution participants demonstrated better grammar learning and longer response times compared to controls. They also exhibited a conservative bias. Grammaticality by itself was a stronger predictor of strings endorsement in decision-strategy-attribution group compared to other groups. Confidence ratings and post-decision wagering only affected the response times. These results were supported by an additional experiment that used a balanced chunk strength design. We conclude that a decision-strategy-attribution procedure may force participants to adopt an analytical decision-making strategy and rely mostly on conscious knowledge of artificial grammar. Copyright © 2017 Elsevier Inc. All rights reserved.

  13. PERFORMANCE-RELIABILITY – THE MAIN SUBJECT OF THE BANKING ANALYSIS OF THE CREDITED SOCIETIES

    Directory of Open Access Journals (Sweden)

    AVRAM (BOITOŞ CAMELIA

    2013-12-01

    Full Text Available Since the crediting activity occupies the primary role in any banking institution, the necessity of study and its analysis is required by following some steps both at a microeconomic level and at a macroeconomic one. Going over the theme, which aims at the importance of a thorough study of the clients' reliability for highlighting the existing risks in the banking activity in general, and particularly in the crediting activity, becomes as more interesting as their approach at the level of the member states of the European Union tends towards a common theme. Starting from these premises, we have considered as being extremely important the selection of a research theme which aims at the risks in the crediting activity, emphasizing the analysis of the clients' reliability both in the decision of crediting in order to assume the risk of credit and in determining the financial and banking performances. Being given the complexity of the existing risks in the banking activity in general and particularly of the credit risk, the clients' reliability represents an extremely important field, of research and application, bearing in mind both the actual stage of developing the Romanian banking system and the attempts of its alignment to the requirements imposed by the European Union.

  14. Performance Evaluation of Submerged Floating Tunnel Subjected to Hydrodynamic and Seismic Excitations

    Directory of Open Access Journals (Sweden)

    Naik Muhammad

    2017-10-01

    Full Text Available Submerged floating tunnels (SFTs are innovative structural solutions to waterway crossings, such as sea-straits, fjords and lakes. As the width and depth of straits increase, the conventional structures such as cable-supported bridges, underground tunnels or immersed tunnels become uneconomical alternatives. For the realization of SFT, the structural response under extreme environmental conditions needs to be evaluated properly. This study evaluates the displacements and internal forces of SFT under hydrodynamic and three-dimensional seismic excitations to check the global performance of an SFT in order to conclude on the optimum design. The formulations incorporate modeling of ocean waves, currents and mooring cables. The SFT responses were evaluated using three different mooring cable arrangements to determine the stability of the mooring configuration, and the most promising configuration was then used for further investigations. A comparison of static, hydrodynamic and seismic response envelope curves of the SFT is provided to determine the dominant structural response. The study produces useful conclusions regarding the structural behavior of the SFT using a three-dimensional numerical model.

  15. Electromechanical performance of induction motor/drive systems subjected to voltage sags

    Science.gov (United States)

    Tunaboylu, Serdar N.

    Induction Motors are workhorses for many industries. They are extensively utilized in industrial variable-frequency drive (VFD) or adjustable-speed drive (ASD) applications as well as constant speed applications. Recent advances in power electronics have made AC motor drives an economically viable solution for ASD applications traditionally dominated by dc motor drives. In this study, electromechanical performance variables of an Induction Motor (IM) have been studied during the balanced voltage sags. For this purpose a laboratory prototype of an industrial mixer has been designed. IM has been coupled to a speed reducer that is worm gear type with a ratio 10 to 1. Then the reducer is vertically coupled to a food process mixer within a metal canister. The mixer represents a high friction load with practically zero inertia. Voltage, current, speed, and power measurements have been collected and compared with the simulation results from Simnon. An open-loop control Volts per Hertz boost strategy has been used in order to compensate the speed loss during the three-phase balanced voltage sags. Both compensated and uncompensated cases have been run and compared with simulation results. Results are verified with a reasonably good agreement that the total system modeling is successful and boost compensation circuit is effective.

  16. Assessment of Mechanical Properties and Damage of High Performance Concrete Subjected to Magnesium Sulfate Environment

    Directory of Open Access Journals (Sweden)

    Sheng Cang

    2017-01-01

    Full Text Available Sulfate attack is one of the most important problems affecting concrete structures, especially magnesium sulfate attack. This paper presents an investigation on the mechanical properties and damage evolution of high performance concrete (HPC with different contents of fly ash exposure to magnesium sulfate environment. The microstructure, porosity, mass loss, dimensional variation, compressive strength, and splitting tensile strength of HPC were investigated at various erosion times up to 392 days. The ultrasonic pulse velocity (UPV propagation in HPC at different erosion time was determined by using ultrasonic testing technique. A relationship between damage and UPV of HPC was derived according to damage mechanics, and a correlation between the damage of HPC and erosion time was obtained eventually. The results indicated that (1 the average increasing amplitude of porosity for HPCs was 34.01% before and after exposure to magnesium sulfate solution; (2 the damage evolution of HPCs under sulfate attack could be described by an exponential fitting; (3 HPC containing 20% fly ash had the strongest resistance to magnesium sulfate attack.

  17. Differences in performance on the functional movement screen between chronic low back pain patients and healthy control subjects.

    Science.gov (United States)

    Ko, Min-Joo; Noh, Kyung-Hee; Kang, Min-Hyeok; Oh, Jae-Seop

    2016-07-01

    [Purpose] Differences in scores on the Functional Movement Screen between patients with chronic lower back pain and healthy control subjects were investigated. [Subjects and Methods] In all, 20 chronic lower back pain patients and 20 healthy control subjects were recruited. Chronic lower back pain patients and healthy controls performed the Functional Movement Screen (deep squat, hurdle step, inline lunge, shoulder mobility, active straight leg raise, trunk stability pushup, and rotary stability). The Mann-Whitney test was used to analyze differences in Functional Movement Screen scores between the two groups. [Results] Chronic lower back pain patients scored lower on the Functional Movement Screen total composite compared with healthy control subjects. Chronic lower back pain patients scored lower on Functional Movement Screen subtests including the deep squat, hurdle step, active straight leg raise, and rotary stability tests. [Conclusion] The deep squat, hurdle step, active straight leg raise, and rotary stability tasks of the Functional Movement Screen can be recommended as a functional assessment tools to identify functional deficits in chronic lower back pain patients.

  18. Quantification of intestinal bacteria, operating cost and performance of fingerlings Nile tilapia subjected to probiotics

    Directory of Open Access Journals (Sweden)

    Nilton Garcia-Marengoni

    2015-05-01

    Full Text Available The use of microorganisms of the genus Bacillus in aquaculture is a nutritional management practice that is rapidly expanding in regions with intensive fish farming. This study aimed to quantify the total bacteria and total coliforms from the intestinal microbiota and estimate the partial operating costs and growth performance of Nile tilapia (Oreochromis niloticus of the GIFT strain. A total of 1,200 post-larvae (24.7 ± 0.50 mg were distributed into 24 aquaria (0.03-m³ capacity within a completely randomized design in 2 x 3 factorial (phase x bacteria, with four replications. Each aquarium, containing 50 post-larvae (sex reversal phase or 30 fish (fingerlings phase, it was considered to be an experimental unit, consisting of three treatments (diet+Bacillus subtilis C-3102, diet+Bacillus cereus var. toyoi and diet without probiotic addition. The quantification of the total bacteria and total coliforms of the intestinal microbiota of tilapia were influenced (P 0.05 by adding probiotics in the diets and no effect of the interaction between phase and bacteria was observed. The weight gain, average daily weight gain, specific growth rate and apparent feed conversion were not affected (P > 0.05 by inclusion of probiotics as part of the diets. The inclusion of B. subtilis and B. cereus as part of diets for Nile tilapia promotes intestinal colonization and improves the survival rate without negatively influencing the feed intake, total biomass, gross revenue and partial operating costs and net revenue. Therefore it recommends the use of these probiotics to growth of tilapia fingerlings Nile, GIFT strain.

  19. Cognitive performance and the thymus among HIV-infected subjects receiving HAART

    Directory of Open Access Journals (Sweden)

    Maria J Miguez-Burbano

    2008-06-01

    Full Text Available Maria J Miguez-Burbano1, John E Lewis2, Jose Moreno3, Joel Fishman41Robert Stempel School of Public Health & School of Medicine, Florida International University, Miami, FL, USA; 2Department of Psychiatry and Behavioral Sciences, 3Department of Medicine, 4Department of Radiology, University of Miami Miller School of Medicine, Miami, FL, USAObjective: To evaluate the impact of alcohol use, which is widespread in human immunodeficiency virus (HIV+ individuals, on highly active antiretroviral therapy (HAART-associated immune and cognitive improvements and the relationship between those two responses.Methods: In a case-control longitudinal study, thymic volume, cognition, and immune responses were evaluated at baseline and after 6 months therapy in HIV+ and HIV- controls. Cognitive performance was evaluated using the HIV Dementia Score (HDS and the California Verbal Learning Test (CVLT.Results: Prior to HAART, thymic volume varied considerably from 2.7 to 29.3 cm3 (11 ± 7.2 cm3. Thymic volume at baseline showed a significantly inverse correlation with the patient’s number of years of drinking (r2 = 0.207; p < 0.01, as well as HDS and the CVLT scores in both HIV-infected (r2 = 0.37, p = 0.03 and noninfected (r2 = 0.8, p = 0.01. HIV-infected individuals with a small thymic volume scored in the demented range, as compared with those with a larger thymus (7 ± 2.7 vs. 12 ± 2.3, p = 0.005. After HAART, light/moderate drinkers exhibited thymus size twice that of heavy drinkers (14.8 ± 10.4 vs. 6.9 ± 3.3 cm3.Conclusions: HAART-associated increases of thymus volume appear to be negatively affected by alcohol consumption and significantly related to their cognitive status. This result could have important clinical implications.Keywords: thymus, CNS, immune, alcohol

  20. The Construct Validation of Learning Organization and Its Influence upon Firm Performance in Mainland China

    Science.gov (United States)

    Li, Mingfei; Lu, Xiaojun

    2007-01-01

    This paper examines the applicability of the learning organization concept and its influence upon firm performance in mainland China. Based on the theoretical framework proposed by Watkins and Marsick, four dimensions of the learning organization instead of seven dimensions were identified. A balanced scorecard-based performance evaluation…

  1. Quantitative performance of E-Scribe warehouse in detecting quality issues with digital annotated ECG data from healthy subjects.

    Science.gov (United States)

    Sarapa, Nenad; Mortara, Justin L; Brown, Barry D; Isola, Lamberto; Badilini, Fabio

    2008-05-01

    The US Food and Drug Administration recommends submission of digital electrocardiograms in the standard HL7 XML format into the electrocardiogram warehouse to support preapproval review of new drug applications. The Food and Drug Administration scrutinizes electrocardiogram quality by viewing the annotated waveforms and scoring electrocardiogram quality by the warehouse algorithms. Part of the Food and Drug Administration warehouse is commercially available to sponsors as the E-Scribe Warehouse. The authors tested the performance of E-Scribe Warehouse algorithms by quantifying electrocardiogram acquisition quality, adherence to QT annotation protocol, and T-wave signal strength in 2 data sets: "reference" (104 digital electrocardiograms from a phase I study with sotalol in 26 healthy subjects with QT annotations by computer-assisted manual adjustment) and "test" (the same electrocardiograms with an intentionally introduced predefined number of quality issues). The E-Scribe Warehouse correctly detected differences between the 2 sets expected from the number and pattern of errors in the "test" set (except for 1 subject with QT misannotated in different leads of serial electrocardiograms) and confirmed the absence of differences where none was expected. E-Scribe Warehouse scores below the threshold value identified individual electrocardiograms with questionable T-wave signal strength. The E-Scribe Warehouse showed satisfactory performance in detecting electrocardiogram quality issues that may impair reliability of QTc assessment in clinical trials in healthy subjects.

  2. Organic Solar Cells: Degradation Processes and Approaches to Enhance Performance

    Energy Technology Data Exchange (ETDEWEB)

    Fungura, Fadzai [Iowa State Univ., Ames, IA (United States)

    2016-12-17

    Intrinsic photodegradation of organic solar cells, theoretically attributed to C-H bond rearrangement/breaking, remains a key commercialization barrier. This work presents, via dark electron paramagnetic resonance (EPR), the first experimental evidence for metastable C dangling bonds (DBs) (g=2.0029±0.0004) formed by blue/UV irradiation of polymer:fullerene blend films in nitrogen. The DB density increased with irradiation and decreased ~4 fold after 2 weeks in the dark. The dark EPR also showed increased densities of other spin-active sites in photodegraded polymer, fullerene, and polymer:fullerene blend films, consistent with broad electronic measurements of fundamental properties, including defect/gap state densities. The EPR enabled identification of defect states, whether in the polymer, fullerene, or at the donor/acceptor (D/A) interface. Importantly, the EPR results indicate that the DBs are at the D/A interface, as they were present only in the blend films. The role of polarons in interface DB formation is also discussed.

  3. Production performance of quails given chromium organic in ration

    Directory of Open Access Journals (Sweden)

    Deden Sudrajat

    2014-12-01

    Full Text Available Egg production of quails depends on quality of ration. Nutrient manipulation by chromiun inclusion in ration is a possible way to improve production. It is known that chromium mineral in form of GTF in blood has a role not only in enhancement of glucose entering cells through improvement of insulin activity but also in metabolism of lipid and synthesis of protein and elimination of heat stress to improve egg production. This study aimed at assessing egg production of quails fed ration containing chromium-yeast. Sixty-four quails aged 40 days were used. A completely randomized design with 4 treatments and 4 replication was applied in this study. Treatment consisted of commercial ration + Cr 0 ppm (R1, commercial ration + Cr 0.5 ppm (R2, commercial ration + Cr 1 ppm (R3, and commercial ration+ Cr 1.5 ppm (R4. Measurements were taken on feed intake, egg weight, egg mass production, hen day, feed conversion rate, egg index, and egg shell thickness. Results showed that A ration containing organic chromium as much as 1,5 ppm did not affect feed intake, egg production, egg weight, and eggshell thickness, however lowered feed conversion rate by up to 32.25% from that of control. Supplementation of 0,5 ppm chromium in the ration lowered the value of eggs index in the fourth week.

  4. MODERN TENDENCIES OF USING INTEGRATIVE APPROACH TO ORGANIZING ART TEACHERS’ INSTRUMENTAL AND PERFORMING TRAINING

    Directory of Open Access Journals (Sweden)

    Zhanna Kartashova

    2016-04-01

    Full Text Available In the article the modern tendencies of using integrative approach to organizing art teachers’ instrumental and performing training. The concept “integration” is singled out; it is defined as the process of recovery, replenishment, combining previously isolated parts; moving of the system to a great organic integrity. It is disclosed that the integration means considering multidimensionality of element features which are being integrated while accumulating quantitative features and emerging a new quality and individual features of integral elements are saved. It is proved that integrating is interrelation of art varieties in the process of their aesthetic and educational impact on pupils that is the whole perception of a work (its content and its emotional, rational, ethical and aesthetic form in the unity of tasks of developing artistic and aesthetic senses, thoughts, tastes and pupils’ ideals. It is thought that integration in art pedagogy is held at three levels: internal artistic and aesthetic synthesis of various arts organically combined with students creative activity; interdisciplinary humanistic synthesis of the arts, the native language, literature, and folklore; looking for semantic blocks, images, concepts that have universal meaning, which, entering all spheres of human consciousness, such as science and mathematics, seamlessly combining them into a coherent system. It is noted that the most efficient approach is appeal to the learning subjects of Humanities cycle – music, literature and art. It is concluded that designing of training should be started with the analyzing prospective art teacher’s activity. It should be understood what the teacher has to do, not in general formulation, but at the level of actions and operations.

  5. Performing Organization Sebuah Format Pengembangan Organisasional (PO Dalam Era Perubahan

    Directory of Open Access Journals (Sweden)

    Noor Arifin

    2009-08-01

    Full Text Available Ciri utama organisasi masa depan menurut Alfin Tofler adalah fleksibilitas, kreativitas, dan inovasi (enterpreneurship. Apa yang harus dilakukan oleh manajemen agar organisasi yang dipimpinnnya mampu mem¬pertahankan eksistensinya dalam gelombang perubahan tersebut? Perubahan di masa depan akan semakin dahsyat dan radikal, menembus ke segala segi kehidupan. Para anggota dan pimpinan organisasional pada se¬mua jajarannya akan dituntut kerja keras, dibarengi dengan menciptakan metode yang mutakhir, teknologi tinggi yang canggih, prosedur yang ringkas dan jelas, perumusan kebijaksanaan yang transparan dan selalu member¬dayakan karyawan (employee empowerment.Format PO masa depan yang bisa survive terhadap perubahan adalah Performing Organizational yang senantiasa menciptakan strategi kecocokan (fit terhadap gejolak internal dan eksternal.Indonesia dalam menghadapi krisis sekarang perlu mencari solusi terbaik dan menyiapkan untuk menghadapi perdagangan bebas dunia. Untuk jangka pendek Indonesia perlu perubahan transformasi organi¬sasional (yang dilakukan secara radikal dengan benar agar krisis dapat berlalu. Namun untuk jangka panjang perlu mengkombinasikan perubahan internal dan mengantisipasi perubahan eksternal dengan menerapkan kon¬sep Performing Organizational. Konsep ini dapat dilaksanakan jika memang situasi dan kondisi memungkinkan, sehingga pendekatan yang dilakukan adalah contingency atau situasional.

  6. Cognitive Performance in Subjects With Multiple Sclerosis Is Robustly Influenced by Gender in Canonical-Correlation Analysis.

    Science.gov (United States)

    Lin, Sue-Jin; Lam, Janet; Beveridge, Samantha; Vavasour, Irene; Traboulsee, Anthony; Li, David K B; MacKay, Alex; McKeown, Martin; Kosaka, Brenda

    2017-01-01

    The authors explored the relations between clinical/demographic characteristics and performance on a neuropsychological battery (eight tests) in a cohort (N=46) of multiple sclerosis (MS) subjects. Findings resulted from a secondary analysis of a study examining the relationships between imaging biomarkers in MS and cognitive tasks of executive functioning. The objective was to determine whether the overlapping test results could be judiciously combined and associated with clinical/demographic variables. Canonical-correlation analysis (CCA) was utilized, and it was found that differences between performance on untimed tests, and the sum of performance on timed Trail-Making Tests, Parts A and B, best matched clinical/demographic variables, and gender was the most important feature.

  7. Best practices on institutional performance indicators system in R and D and I public organizations - the case of military organizations

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Maria Cecilia [Centro Tecnologico da Marinha em Sao Paulo (CTMSP), SP (Brazil). Superintendencia da Qualidade]. E-mail: mcecilia37@hotmail.com; ctmsp-70b1@ctmsp.mar.mil.br; Zouain, Desiree Moraes [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)]. E-mail: dmzouain@ipen.br

    2007-07-01

    This paper reflects the partial results of a Master degree research, performed in IPEN and CTMSP in Brazil. The focus of this research is to establish the best practices for an Institutional Performance Indicators System in Public Research, Development and Innovation (R and D and I) Organizations, particularly, the military ones. In public sector, especially military Institutes that are strongly committed to R and D and I, there have been changes in order to modernize the organization management. The focus, in our days, is on the Performance Indicator System, financial or not, strategic, tactic and operational, as a tool for the organizational control over the accomplishment of settled plans, the completion of the mission, everything according to a continuous improvement process. Among the many approaches underlying the development of a Performance Indicator System, since the 90s, the Balanced Scorecard - BSC stands out. It is based on the studies developed by Kaplan and Norton in 1986. By using the BSC approach, it is possible to construct a Performance Indicator System that makes available the information, financial or non-financial data, in logical format. This paper presents the results of the international and national experiences review of Institutional Performance Indicator Systems, applicable to the public organizations of R and D and I, preferably military organizations, and identify the best practices of these Systems. At the end of this paper, it is conducted a comparison among the experiences analyzed, in operation or planned, and are established some suggestions for an Institutional Performance Indicator System for a Military R and D and I Organization. (author)

  8. The effects of receiver placement on probe microphone, performance, and subjective measures with open canal hearing instruments.

    Science.gov (United States)

    Alworth, Lynzee N; Plyler, Patrick N; Reber, Monika Bertges; Johnstone, Patti M

    2010-04-01

    Open canal hearing instruments differ in method of sound delivery to the ear canal, distance between the microphone and the receiver, and physical size of the devices. Moreover, RITA (receiver in the aid) and RITE (receiver in the ear) hearing instruments may also differ in terms of retention and comfort as well as ease of use and care for certain individuals. What remains unclear, however, is if any or all of the abovementioned factors contribute to hearing aid outcome. To determine the effect of receiver location on performance and/or preference of listeners using open canal hearing instruments. An experimental study in which subjects were exposed to a repeated measures design. Twenty-five adult listeners with mild sloping to moderately severe sensorineural hearing loss (mean age 67 yr). Participants completed two six-week trial periods for each device type. Probe microphone, objective, and subjective measures (quiet, noise) were conducted unaided and aided at the end of each trial period. Occlusion effect results were not significantly different between the RITA and RITE instruments; however, frequency range was extended in the RITE instruments, resulting in significantly greater maximum gain for the RITE instruments than the RITA instruments at 4000 and 6000 Hz. Objective performance in quiet or in noise was unaffected by receiver location. Subjective measures revealed significantly greater satisfaction ratings for the RITE than for the RITA instruments. Similarly, preference in quiet and overall preference were significantly greater for the RITE than for the RITA instruments. Although no occlusion differences were noted between instruments, the RITE did demonstrate a significant difference in reserve gain before feedback at 4000 and 6000 Hz. Objectively; no positive benefit was noted between unaided and aided conditions on speech recognition tests. These results suggest that such testing may not be sensitive enough to determine aided benefit with open canal

  9. Effects of three therapeutic doses of codeine/paracetamol on driving performance, a psychomotor vigilance test, and subjective feelings.

    Science.gov (United States)

    Amato, Jean-Noël; Marie, Sullivan; Lelong-Boulouard, Véronique; Paillet-Loilier, Magalie; Berthelon, Catherine; Coquerel, Antoine; Denise, Pierre; Bocca, Marie-Laure

    2013-07-01

    Some recent pharmacoepidemiological studies revealed an elevated risk of driving accidents after opioid analgesics uses. Among analgesics, codeine is often associated with paracetamol in numerous pharmaceutical specialties. The objective of this study was to evaluate the dose-effect relationship of three usual therapeutic doses of codeine/paracetamol on driving ability, psychomotor performance, subjective alertness, in link with blood concentrations in healthy young volunteers. Driving performance, responses to psychomotor vigilance tests, and scales reflecting alertness were evaluated during the morning after drug intake in a double-blind, randomized, placebo-controlled study. Sixteen healthy volunteers (23.4 ± 2.7 years old, 8 men and 8 women) participated in this balanced, cross-over study. Three doses of codeine/paracetamol (20/400, 40/800, 60/1200 mg) were evaluated against placebo. Two blood samples were collected, 1 and 4 h after drug intake. In serum, codeine and morphine concentrations were determined in serum using high-performance liquid chromatography electrospray ionization-tandem mass spectrometry, and paracetamol concentrations using fluorescence polarization immunoassay. Driving and psychomotor performance were not affected by any of the three codeine/paracetamol doses. However, significant, though modest, correlations were observed between the driving parameters and both morphine and codeine blood concentrations. This study did not reveal any significant impairment in performance due to the three therapeutic doses used in healthy young volunteers. However, the relationships between drug blood concentration and behavioral measures suggest that an inter-subject variability in blood concentration may influence the power of the observed drug effect.

  10. Papanicolaou smear findings in solid-organ transplant recipients compared with normal subjects according to the Bethesda 2001 system.

    Science.gov (United States)

    Ok Atılgan, Alev; Tepeoğlu, Merih; Haberal, A Nihan; Durukan, Elif; Kuşcu, Esra; Haberal, Mehmet

    2015-04-01

    Solid-organ transplant recipients are at increased risk of developing cancer including cervical cancer compared with woman in the general population, mostly due to long-term immunosuppressive therapy. The Papanicolaou smear remains the primary method of screening cervical pathology including preinvasive and invasive lesions. The objective of this study was to evaluate Pap smear findings in solid-organ transplant recipients, determine the prevalence of abnormal smears, and compare these patients with the general population. We retrospectively examined 111 women patients who received liver or kidney transplant between January 1990 to December 2012 at Başkent University Ankara Hospital. Pap smear findings were compared with normal control patients matched for same age and technical procedure of cervical cytology. To selection of control patients, propensity score matching program was performed. All Pap smears were re-examined according to Bethesda 2001 criteria. In 111 transplant patients, 2 patients (1.8%) had atypical squamous cells of undetermined significance, 8 patients (7.2%) had low-grade squamous intraepithelial lesion, 15 patients (13.5%) had Candida infection, 2 patients (1.8%) had Trichomonas vaginalis, 1 patient (0.9%) had herpes simplex infection, 13 patients (11.7%) had bacterial vaginosis, 15 patients (13.5%) had reactive changes due to inflammation, and 18 patients (16.2%) had atrophy. When we compared our results with the control group, there were statistically significant differences (P ≤ .05) between the 2 groups in epithelial cell abnormalities (low-grade squamous intraepithelial lesion), Candida infection, bacterial vaginosis, and atrophy. Pap smear screening potentially may help recognize cervical preinvasive and invasive lesions. The risk of developing cervical intraepithelial neoplasia is greater in transplant recipients because of immunosuppressive therapy. The incidence of low-grade squamous intraepithelial lesion was significantly greater

  11. A Comparison of Robotic Simulation Performance on Basic Virtual Reality Skills: Simulator Subjective Versus Objective Assessment Tools.

    Science.gov (United States)

    Dubin, Ariel K; Smith, Roger; Julian, Danielle; Tanaka, Alyssa; Mattingly, Patricia

    2017-07-27

    To answer the question of whether there is a difference between robotic virtual reality simulator performance assessment and validated human reviewers. Current surgical education relies heavily on simulation. Several assessment tools are available to the trainee, including the actual robotic simulator assessment metrics and the Global Evaluative Assessment of Robotic Skills (GEARS) metrics, both of which have been independently validated. GEARS is a rating scale through which human evaluators can score trainees' performances on 6 domains: depth perception, bimanual dexterity, efficiency, force sensitivity, autonomy, and robotic control. Each domain is scored on a 5-point Likert scale with anchors. We used 2 common robotic simulators, the dV-Trainer (dVT; Mimic Technologies Inc., Seattle, WA) and the da Vinci Skills Simulator (dVSS; Intuitive Surgical, Sunnyvale, CA), to compare the performance metrics of robotic surgical simulators with the GEARS for a basic robotic task on each simulator. A prospective single-blinded randomized study. A surgical education and training center. Surgeons and surgeons in training. Demographic information was collected including sex, age, level of training, specialty, and previous surgical and simulator experience. Subjects performed 2 trials of ring and rail 1 (RR1) on each of the 2 simulators (dVSS and dVT) after undergoing randomization and warm-up exercises. The second RR1 trial simulator performance was recorded, and the deidentified videos were sent to human reviewers using GEARS. Eight different simulator assessment metrics were identified and paired with a similar performance metric in the GEARS tool. The GEARS evaluation scores and simulator assessment scores were paired and a Spearman rho calculated for their level of correlation. Seventy-four subjects were enrolled in this randomized study with 9 subjects excluded for missing or incomplete data. There was a strong correlation between the GEARS score and the simulator metric

  12. When does stress help or harm? The effects of stress controllability and subjective stress response on stroop performance.

    Science.gov (United States)

    Henderson, Roselinde K; Snyder, Hannah R; Gupta, Tina; Banich, Marie T

    2012-01-01

    The ability to engage in goal-directed behavior despite exposure to stress is critical to resilience. Questions of how stress can impair or improve behavioral functioning are important in diverse settings, from athletic competitions to academic testing. Previous research suggests that controllability is a key factor in the impact of stress on behavior: learning how to control stressors buffers people from the negative effects of stress on subsequent cognitively demanding tasks. In addition, research suggests that the impact of stress on cognitive functioning depends on an individual's response to stressors: moderate responses to stress can lead to improved performance while extreme (high or low) responses can lead to impaired performance. The present studies tested the hypothesis that (1) learning to behaviorally control stressors leads to improved performance on a test of general executive functioning, the color-word Stroop, and that (2) this improvement emerges specifically for people who report moderate (subjective) responses to stress. Experiment 1: Stroop performance, measured before and after a stress manipulation, was compared across groups of undergraduate participants (n = 109). People who learned to control a noise stressor and received accurate performance feedback demonstrated reduced Stroop interference compared with people exposed to uncontrollable noise stress and feedback indicating an exaggerated rate of failure. In the group who learned behavioral control, those who reported moderate levels of stress showed the greatest reduction in Stroop interference. In contrast, in the group exposed to uncontrollable events, self-reported stress failed to predict performance. Experiment 2: In a second sample (n = 90), we specifically investigated the role of controllability by keeping the rate of failure feedback constant across groups. In the group who learned behavioral control, those who reported moderate levels of stress showed the greatest Stroop

  13. Performance evaluation method of electric energy data acquire system based on combination of subjective and objective weights

    Science.gov (United States)

    Gao, Chen; Ding, Zhongan; Deng, Bofa; Yan, Shengteng

    2017-10-01

    According to the characteristics of electric energy data acquire system (EEDAS), considering the availability of each index data and the connection between the index integrity, establishing the performance evaluation index system of electric energy data acquire system from three aspects as master station system, communication channel, terminal equipment. To determine the comprehensive weight of each index based on triangular fuzzy number analytic hierarchy process with entropy weight method, and both subjective preference and objective attribute are taken into consideration, thus realize the performance comprehensive evaluation more reasonable and reliable. Example analysis shows that, by combination with analytic hierarchy process (AHP) and triangle fuzzy numbers (TFN) to establish comprehensive index evaluation system based on entropy method, the evaluation results not only convenient and practical, but also more objective and accurate.

  14. Recent progress of high performance polymer OLED and OPV materials for organic printed electronics.

    Science.gov (United States)

    Sekine, Chizu; Tsubata, Yoshiaki; Yamada, Takeshi; Kitano, Makoto; Doi, Shuji

    2014-06-01

    The development of organic printed electronics has been expanding to a variety of applications and is expected to bring innovations to our future life. Along with this trend, high performance organic materials with cost-efficient fabrication processes and specific features such as thin, light weight, bendable, and low power consumption are required. A variety of organic materials have been investigated in the development of this field. The basic guidelines for material design and the recent progress of polymer-based organic light-emitting diodes (OLEDs) and organic photovoltaic cells (OPVs) are reported.

  15. Utilizing an ANP framework for prioritizing effective criteria on performance management in cooperative organization

    Directory of Open Access Journals (Sweden)

    Hosein Akhavan Alavi

    2012-09-01

    Full Text Available Performance management plays an essential role on increasing efficiency of business units. It helps find important barriers against a business unit helping us setup better strategies for handling troubles. In this paper, we present an empirical study to find important factors influencing performance management in cooperative organizations. The proposed study uses analytical hierarchy process to rank important factors in three groups of team level, individual and organization levels. The survey is based on receiving feedbacks from decision makers and making a pairwise comparison on measuring the relative importance of each criterion influencing performance management. The results of our survey indicate that setting appropriate standards for performance management is the most important item followed by relationship between organization structure and performance management, performance management based on future events. The other three factors including continuous improvement and updating systems, encouraging employee for change culture and relationship between future outlook and performance management are other important factors.

  16. Subjectivation and Performative Politics--Butler Thinking Althusser and Foucault: Intelligibility, Agency and the Raced-Nationed-Religioned Subjects of Education

    Science.gov (United States)

    Youdell, Deborah

    2006-01-01

    Judith Butler is perhaps best known for her take-up of the debate between Derrida and Austin over the function of the performative and her subsequent suggestion that the subject be understood as performatively constituted. Another important but less often noted move within Butler's consideration of the processes through which the subject is…

  17. Distraction and task engagement: How interesting and boring information impact driving performance and subjective and physiological responses.

    Science.gov (United States)

    Horrey, William J; Lesch, Mary F; Garabet, Angela; Simmons, Lucinda; Maikala, Rammohan

    2017-01-01

    As more devices and services are integrated into vehicles, drivers face new opportunities to perform additional tasks while driving. While many studies have explored the detrimental effects of varying task demands on driving performance, there has been little attention devoted to tasks that vary in terms of personal interest or investment-a quality we liken to the concept of task engagement. The purpose of this study was to explore the impact of task engagement on driving performance, subjective appraisals of performance and workload, and various physiological measurements. In this study, 31 participants (M = 37 yrs) completed three driving conditions in a driving simulator: listening to boring auditory material; listening to interesting material; and driving with no auditory material. Drivers were simultaneously monitored using near-infrared spectroscopy, heart monitoring and eye tracking systems. Drivers exhibited less variability in lane keeping and headway maintenance for both auditory conditions; however, response times to critical braking events were longer in the interesting audio condition. Drivers also perceived the interesting material to be less demanding and less complex, although the material was objectively matched for difficulty. Drivers showed a reduced concentration of cerebral oxygenated hemoglobin when listening to interesting material, compared to baseline and boring conditions, yet they exhibited superior recognition for this material. The practical implications, from a safety standpoint, are discussed. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

  18. High Performance Short-Channel Organic Field-Effect Transistors with Graphene Electrodes

    Science.gov (United States)

    Kang, Narae; Khondaker, Saiful I.

    2015-03-01

    Organic Field-Effect Transistors (OFETs) have received a great deal of attention due to their easy-processing, low-cost, flexibility, and transparency that can lead to future electronic applications such as flexible display, solar cell, and sensors. One of the major challenges in fabricating high-performance OFETs is to reduce a large injection barrier formed at metal/organic interface, which results in poor electrical transport performance. In order to overcome this issue, graphene has been suggested as a promising electrode material for OFETs due to its unique electronic properties as well as strong π- π interaction with organic molecule, which can reduce the injection barrier at the electrode/organic interface. In this study, we fabricated short-channel OEFTs using mechanically exfoliated graphene electrodes, and performed temperature dependent transport studies. We will present the detailed temperature dependent data and discuss the charge carrier injection mechanism at graphene/organic interface. US NSF Grant No. ECCS 1102228.

  19. HUMAN RESOURCES EMPOWERMENT, WORKING MOTIVATION AND ORGANIZATION CHANGE IN IMPROVING HOTEL BUSINESS PERFORMANCE IN BALI

    Directory of Open Access Journals (Sweden)

    Gusti Kade Sutawa

    2016-03-01

    Full Text Available This study aims to test and analyze impact of human resource development on working motivation of hotel business workers in Bali, impact of human resource development on organizational changes of hotel business in Bali, impact of human resource development on the performance of hotel business in Bali, impact of working motivation against organizational changes in hotel business in Bali, impact of working motivation on the organizations performance of the hotel business in Bali, and impact of organizational changes against organizations performance of the hotel business in Bali. There were 170 respondents of star-rated hotel employees which were selected through purposive sampling technique. Structural Equation Modeling with the application Analysis of Moment Structure was used to analyze the data. The results show that empowerment of human resources (HR has positive and significant impact on working motivation, organizational changes, and the organization performance of hotel business in Bali, working motivation has positive and significant impact on organizational changes and the organization performance of hotel business in Bali and organizational changes have significant and positive impact on the organization performance of hotel business in Bali. Empowerment variables have the most powerful impact to support the improvement of organizational performance, followed by organizational changes and working motivation variables. The results indicate that human resource empowerment improves the performance of the hotel business in Bali. Therefore, human resource development need to be prioritized in order to improve organizational performance of star hotels in Bali.

  20. Comparison of the perceived subjective exertion and total load lifted response in resistance exercises performed on stable and unstable platforms

    Directory of Open Access Journals (Sweden)

    Liliane Cunha Aranda

    2015-03-01

    Full Text Available This study aimed to compare the perceived subjective exertion (PSE and total load lifted in resistance exercises performed on stable platforms (SP and unstable platforms (UP. Participants were 20 men (24.6 ± 3.4 years, 179 ± 0.1 cm, 80.6 ± 9.1 kg and 11.8 ± 3.4% fat. Each subject performed a 15 maximum repetition test in half squat exercises (soil and balance discs, pronated barbell row (soil and bosu and biceps curl (soil and balance discs in both conditions. PSE was measured using the OMNI-RES scale and the load lifted value (kg. To verify the normality of data, the Shapiro-Wilk test was used. Possible differences related to loads and PSE on the platforms were performed by the paired t test. Significance level of p <0.05 was adopted. No significant differences between PSE values on SP and UP were respectively observed in the half squat (8.2 and 8.5 / p = 0.8, pronated barbell row (8.4 and 8.4 / p = 0.7 and biceps curl (8.6 and 8.7 / p = 1.0. Higher load values on SP and UP were respectively found in half squat (83.9kg and 70.3kg / p <0.001 and pronated barbell row exercises (53.2kg and 48.6kg / p = 0.01 on SP. However, biceps curl showed dissimilar behavior (48.2kg and 47.4kg / p = 0.5. It was concluded that UP does not promote differences in PSE responses even working with smaller load or similar load.

  1. When does stress help or harm? The effects of stress controllability and subjective stress response on Stroop performance.

    Directory of Open Access Journals (Sweden)

    Roselinde Kaiser Henderson

    2012-06-01

    Full Text Available The ability to engage in goal-directed behavior despite exposure to stress is critical to resilience. Questions of how stress can impair or improve behavioral functioning are important in diverse settings, from athletic competitions to academic testing to clinical therapy. Previous research suggests that controllability is a key factor in the impact of stress on behavior: learning how to control stressors buffers people from the negative effects of stress on subsequent cognitively demanding tasks. In addition, research suggests that the impact of stress on cognitive functioning depends on an individual’s response to stressors: moderate responses to stress can lead to improved performance while extreme (high or low responses can lead to impaired performance. The present studies tested the hypothesis that 1 learning to behaviorally control stressors leads to improved performance on a test of general executive functioning, the color-word Stroop, and that 2 this improvement emerges specifically for people who report moderate (subjective responses to stress. Experiment 1: Stroop performance, measured before and after a stress manipulation, was compared across groups of undergraduate participants (n=109. People who learned to control a noise stressor and received accurate performance feedback demonstrated reduced Stroop interference compared with people exposed to uncontrollable noise stress and feedback indicating an exaggerated rate of failure. In the group who learned behavioral control, those who reported moderate levels of stress showed the greatest reduction in Stroop interference. In contrast, in the group exposed to uncontrollable events, self-reported stress failed to predict performance. Experiment 2: In a second sample (n=90, we specifically investigated the role of controllability by keeping the rate of failure feedback constant across groups. In the group who learned behavioral control, those who reported moderate levels of stress

  2. Simultaneous analysis of small organic acids and humic acids using high performance size exclusion chromatography

    NARCIS (Netherlands)

    Qin, X.P.; Liu, F.; Wang, G.C.; Weng, L.P.

    2012-01-01

    An accurate and fast method for simultaneous determination of small organic acids and much larger humic acids was developed using high performance size exclusion chromatography. Two small organic acids, i.e. salicylic acid and 2,3-dihydroxybenzoic acid, and one purified humic acid material were used

  3. THE INSUFFICIENCY OF FINANCIAL ANALYSIS FOR THE PERFORMANCE OF NON-PROFIT ORGANIZATIONS

    Directory of Open Access Journals (Sweden)

    Delia Corina MIHĂLŢAN

    2015-07-01

    Full Text Available The paper work is based on the hypothesis that the financial analysis is insufficient when it comes to reflecting the performance of nonprofit organizations. Our main argument is the social purpose of non-profit organization, which is the reason why the analyst has to find optimal solutions for analyzing their performance while taking into account their social impact. Our research focused on the conceptualizations of the performance of non-profit organizations and the adequacy of the existing models for analyzing it. The research results refer to the limits of financial analysis regarding the performance of non-profit organizations because it can only offer relevant information regarding its effectiveness.

  4. Organizational Performance: Integration of the Value, Rarity, Imitability and Organization Framework in Project Management

    Directory of Open Access Journals (Sweden)

    Ronielton Rezende Oliveira

    2017-08-01

    Full Text Available Organizational performance is often associated with competitive advantage. In strategy studie saimed at expanding communication on a global vision of organizations and their initiatives, strategic project management stands out, whichis related to the mechanisms and set of management decisions that determine long term organizational performance. This study verify how the Resource-based view adds value to organizational initiatives seeking to achieve organizational performance through projects. The study considers strategic management practiced by the project managers o asto present a conceptual framework with four propositions that demonstrate the integration of the Value, Rarity, Imitability and Organization framework with project management and its relations to organizational performance.

  5. Hygienic quality of artificial greywater subjected to aerobic treatment: a comparison of three filter media at increasing organic loading rates.

    Science.gov (United States)

    Lalander, Cecilia; Dalahmeh, Sahar; Jönsson, Håkan; Vinnerås, Björn

    2013-01-01

    With a growing world population, the lack of reliable water sources is becoming an increasing problem. Reusing greywater could alleviate this problem. When reusing greywater for crop irrigation it is paramount to ensure the removal of pathogenic organisms. This study compared the pathogen removal efficiency of pine bark and activated charcoal filters with that of conventional sand filters at three organic loading rates. The removal efficiency of Escherichia coli O157:H7 decreased drastically when the organic loading rate increased fivefold in the charcoal and sand filters, but increased by 2 log10 in the bark filters. The reduction in the virus model organism coliphage phiX174 remained unchanged with increasing organic loading in the charcoal and sand filters, but increased by 2 log10 in the bark filters. Thus, bark was demonstrated to be the most promising material for greywater treatment in terms of pathogen removal.

  6. Subjective Perception of Sports Performance, Training, Sleep and Dietary Patterns of Malaysian Junior Muslim Athletes during Ramadan Intermittent Fasting.

    Science.gov (United States)

    Singh, Rabindarjeet; Hwa, Ooi Cheong; Roy, Jolly; Jin, Chai Wen; Ismail, Siti Musyrifah; Lan, Mohamad Faizal; Hiong, Loo Lean; Aziz, Abdul-Rashid

    2011-09-01

    To examine the subjective perception of daily acute fasting on sports performance, training, sleep and dietary patterns of Muslim athletes during the Ramadan month. Seven hundred and thirty-four (411 male and 323 female) Malaysian Junior-level Muslim athletes (mean age 16.3 ± 2.6 y) participated in the survey which was designed to establish the personal perception of their sport performance, sleep pattern, food and fluid intake during Ramadan fasting. The survey was conducted during and immediately after the month of Ramadan in 2009. Twenty-four percent of the athletes perceived that there was an adverse effect of the Ramadan fast on their sporting performance and 29.3% reported that quality of training during Ramadan was also negatively influenced. Majority (48.2%) of the athletes stated that Ramadan fasting did not affect their normal sleep pattern but 66.6% of them complained of sleepiness during the daytime. Half of the athletes (41.4%) maintained the caloric intake during Ramadan as they normally would with the majority of them (76.2%) reporting that they consumed more fluids during Ramadan. Overall, Malaysian Junior-level Muslim athletes showed diverse views in their perception of changes in their training, sleep and dietary patterns during Ramadan fast. These individual differences probably indicate differences in the athletes' adaptability and coping strategies during fasting and training in Ramadan.

  7. Electrically evoked and voluntary maximal isometric tension in relation to dynamic muscle performance in elderly male subjects, aged 69 years.

    Science.gov (United States)

    Davies, C T; White, M J; Young, K

    1983-01-01

    The dynamic performance and electrically evoked mechanical properties of elderly triceps surae muscle have been investigated in 9 men, aged 69 yr. Dynamic performance consisted of cycling on a force bicycle and a vertical jump off two feet from a force platform. The results showed that the time to peak tension (TPT) and half relaxation time (1/2 RT) were significantly greater (p less than 0.001) by 30 ms and 22 ms and the supramaximal twitch (Pt) and tetanic (20 Hz-P020) tensions and maximal voluntary contraction (MVC) were less by 45 N (-33%), 708 N (-49%), and 899 N (-43%) in the elderly compared with young male control subjects. On the force platform, the height jumped (Ht), maximal force exerted (P), take-off velocity (VT), net impulse (NI) and peak power output (W) were less by 18.6 cm, 173 N, 0.9 ms-1, 52 Ns and 1120 w respectively. Similar differences of power, force and velocity were observed on the force bicycle. The reduction of W in the elderly was associated with the contractile characteristics of the leg muscle. The loss of contractile speed and capacity to to generate force in old people was reflected in their inability to develop power during the performance of a maximal vertical jump and cycling.

  8. Subjective Perception of Sports Performance, Training, Sleep and Dietary Patterns of Malaysian Junior Muslim Athletes during Ramadan Intermittent Fasting

    Science.gov (United States)

    Singh, Rabindarjeet; Hwa, Ooi Cheong; Roy, Jolly; Jin, Chai Wen; Ismail, Siti Musyrifah; Lan, Mohamad Faizal; Hiong, Loo Lean; Aziz, Abdul-Rashid

    2011-01-01

    Purpose To examine the subjective perception of daily acute fasting on sports performance, training, sleep and dietary patterns of Muslim athletes during the Ramadan month. Methods Seven hundred and thirty-four (411 male and 323 female) Malaysian Junior-level Muslim athletes (mean age 16.3 ± 2.6 y) participated in the survey which was designed to establish the personal perception of their sport performance, sleep pattern, food and fluid intake during Ramadan fasting. The survey was conducted during and immediately after the month of Ramadan in 2009. Results Twenty-four percent of the athletes perceived that there was an adverse effect of the Ramadan fast on their sporting performance and 29.3% reported that quality of training during Ramadan was also negatively influenced. Majority (48.2%) of the athletes stated that Ramadan fasting did not affect their normal sleep pattern but 66.6% of them complained of sleepiness during the daytime. Half of the athletes (41.4%) maintained the caloric intake during Ramadan as they normally would with the majority of them (76.2%) reporting that they consumed more fluids during Ramadan. Conclusions Overall, Malaysian Junior-level Muslim athletes showed diverse views in their perception of changes in their training, sleep and dietary patterns during Ramadan fast. These individual differences probably indicate differences in the athletes’ adaptability and coping strategies during fasting and training in Ramadan. PMID:22375236

  9. “How many sums can I do”? Performative strategies and diffractive thinking as methodological tools for rethinking mathematical subjectivity

    Directory of Open Access Journals (Sweden)

    Anna Palmer

    2011-12-01

    Full Text Available The aim of this article is to illustrate how the understanding of mathematical subjectivity changes when transiting theoretically and methodologically from a discursive and performative thinking, as suggested by Judith Butler (1990, 1993, 1997, to an agential realist and diffractive thinking, inspired by Karen Barad’s theories (2007, 2008. To show this I have examined narrative memory stories about mathematics written by students participating in Teacher Education maths courses. I provide examples of such stories and present an in-depth analysis of one such story. The first part of the analysis has been carried out using performative methodological strategies – in relation to Judith Butler’s theories – while the latter part of analysis has been performed with the aid of diffractive methodological thinking – in relation to Barad’s theoretical perspectives. When summarising the different analyses, it becomes evident that the understanding of data – and of me as researcher – changes when transiting from one theoretical and methodological arena to another. Depending on which questions we pose, what methodological strategies we use, and which theoretical fields we get involved in, we would see and understand this differently.

  10. Performance Evaluation of Waterproofing Membrane Systems Subject to the Concrete Joint Load Behavior of Below-Grade Concrete Structures

    Directory of Open Access Journals (Sweden)

    Jaeyoung Song

    2017-11-01

    Full Text Available Below-grade structures such as parking lots, underground subway tunnels, and basements are growing in scale and reaching deeper below-ground levels. In this type of environment, they become subject to higher water pressure. The concrete material of the structures is exposed to wet conditions for longer periods of time, which makes the proper adhesion of waterproofing membranes difficult. Joint movements from increased structural settlement, thermal expansion/shrinkage, and physical loads from external sources (e.g., vehicles make securing durable waterproofing challenging. While ASTM Guides, Korean Codes, and BS Practice Codes on below-grade waterproofing stress the importance of manufacturer specification for quality control, ensuring high quality waterproofing for the ever-changing scale of construction remains a challenge. This study proposes a new evaluation method and criteria which allow for the selection of waterproofing membranes based on specific performance attributes and workmanship. It subjects six different waterproofing membrane systems (installed on dry and wet surface conditioned mortar slab specimens with an artificial joint to different cyclic movement widths to 300 cycles in water to demonstrate that inadequate material properties and workmanship are key causes for leakages.

  11. Neurocognitive performance, subjective well-being, and psychosocial functioning after benzodiazepine withdrawal in patients with schizophrenia or bipolar disorder

    DEFF Research Database (Denmark)

    Baandrup, Lone; Fagerlund, Birgitte; Glenthoj, Birte

    2017-01-01

    Chronic benzodiazepine use is common in patients with mental illness and is associated with cognitive impairment. It is unclear whether benzodiazepine-induced cognitive impairment is reversible. Amelioration of cognitive dysfunction may be facilitated during benzodiazepine tapering by add......-on melatonin due to its anti-inflammatory and neuroprotective properties. We examined how melatonin and benzodiazepine withdrawal affect cognition, subjective well-being, and psychosocial functioning. Eighty patients with schizophrenia or bipolar disorder were randomized to add-on treatment once daily...... with either prolonged-release melatonin or placebo in a 24-week, double-blind clinical trial. All participants gradually tapered usual benzodiazepine dosage in a closely monitored treatment setting. We used the Brief Assessment of Cognition in Schizophrenia (BACS) to assess neurocognitive performance...

  12. Many shades of gray-The context-dependent performance of organic agriculture.

    Science.gov (United States)

    Seufert, Verena; Ramankutty, Navin

    2017-03-01

    Organic agriculture is often proposed as a more sustainable alternative to current conventional agriculture. We assess the current understanding of the costs and benefits of organic agriculture across multiple production, environmental, producer, and consumer dimensions. Organic agriculture shows many potential benefits (including higher biodiversity and improved soil and water quality per unit area, enhanced profitability, and higher nutritional value) as well as many potential costs including lower yields and higher consumer prices. However, numerous important dimensions have high uncertainty, particularly the environmental performance when controlling for lower organic yields, but also yield stability, soil erosion, water use, and labor conditions. We identify conditions that influence the relative performance of organic systems, highlighting areas for increased research and policy support.

  13. Many shades of gray—The context-dependent performance of organic agriculture

    Science.gov (United States)

    Seufert, Verena; Ramankutty, Navin

    2017-01-01

    Organic agriculture is often proposed as a more sustainable alternative to current conventional agriculture. We assess the current understanding of the costs and benefits of organic agriculture across multiple production, environmental, producer, and consumer dimensions. Organic agriculture shows many potential benefits (including higher biodiversity and improved soil and water quality per unit area, enhanced profitability, and higher nutritional value) as well as many potential costs including lower yields and higher consumer prices. However, numerous important dimensions have high uncertainty, particularly the environmental performance when controlling for lower organic yields, but also yield stability, soil erosion, water use, and labor conditions. We identify conditions that influence the relative performance of organic systems, highlighting areas for increased research and policy support. PMID:28345054

  14. THE RELATIONSHIP BETWEEN THE USE OF A PERFORMANCE MEASUREMENT SYSTEM, ORGANIZATIONAL FACTORS, ACCOUNTABILITY, AND THE PERFORMANCE OF PUBLIC SECTOR ORGANIZATIONS

    Directory of Open Access Journals (Sweden)

    Muhammad Ahyaruddin

    2016-01-01

    Full Text Available This research studies the accountability and performance of public sector organizations. It provides empirical evidence about the relationship between the use of a performance measurement system and the organizational factors of accountability and organizational performance. We investigate the three roles of a performance measurement system (its operational use, incentive use, and exploratory use, and three organizational factors (contractibility, the legislative mandate, and management commitment. A mixed method approach with sequential explanatory design was used to answer the research question. The hypotheses testing used Structural Equation Modelling-Partial Least Square (SEM-PLS. Our findings were based on survey data from 137 SKPD officers in the local government of Yogyakarta Province, and showed that management commitment had a positive association with accountability and organizational performance. We also found a positive association between the legislative mandate and accountability. However, this research did not find any significant association among the three roles of the performance measurement system with accountability and organizational performance. Based on the institutional theory, our findings show substantial contributions by the institutional isomorphism, which was used in an appropriate manner to explain the context of public sector organizations, especially in the local government of Yogyakarta Province.

  15. Development of high-performance printed organic field-effect transistors and integrated circuits.

    Science.gov (United States)

    Xu, Yong; Liu, Chuan; Khim, Dongyoon; Noh, Yong-Young

    2015-10-28

    Organic electronics is regarded as an important branch of future microelectronics especially suited for large-area, flexible, transparent, and green devices, with their low cost being a key benefit. Organic field-effect transistors (OFETs), the primary building blocks of numerous expected applications, have been intensively studied, and considerable progress has recently been made. However, there are still a number of challenges to the realization of high-performance OFETs and integrated circuits (ICs) using printing technologies. Therefore, in this perspective article, we investigate the main issues concerning developing high-performance printed OFETs and ICs and seek strategies for further improvement. Unlike many other studies in the literature that deal with organic semiconductors (OSCs), printing technology, and device physics, our study commences with a detailed examination of OFET performance parameters (e.g., carrier mobility, threshold voltage, and contact resistance) by which the related challenges and potential solutions to performance development are inspected. While keeping this complete understanding of device performance in mind, we check the printed OFETs' components one by one and explore the possibility of performance improvement regarding device physics, material engineering, processing procedure, and printing technology. Finally, we analyze the performance of various organic ICs and discuss ways to optimize OFET characteristics and thus develop high-performance printed ICs for broad practical applications.

  16. Minimal Impact of Organic Chemistry Prerequisite on Student Performance in Introductory Biochemistry

    Science.gov (United States)

    Wright, Robin; Cotner, Sehoya; Winkel, Amy

    2009-01-01

    Curriculum design assumes that successful completion of prerequisite courses will have a positive impact on student performance in courses that require the prerequisite. We recently had the opportunity to test this assumption concerning the relationship between completion of the organic chemistry prerequisite and performance in introductory…

  17. Effects of zeolite supplementation on parameters of intestinal barrier integrity, inflammation, redoxbiology and performance in aerobically trained subjects.

    Science.gov (United States)

    Lamprecht, Manfred; Bogner, Simon; Steinbauer, Kurt; Schuetz, Burkhard; Greilberger, Joachim F; Leber, Bettina; Wagner, Bernhard; Zinser, Erwin; Petek, Thomas; Wallner-Liebmann, Sandra; Oberwinkler, Tanja; Bachl, Norbert; Schippinger, Gert

    2015-01-01

    Zeolites are crystalline compounds with microporous structures of Si-tetrahedrons. In the gut, these silicates could act as adsorbents, ion-exchangers, catalysts, detergents or anti-diarrheic agents. This study evaluated whether zeolite supplementation affects biomarkers of intestinal wall permeability and parameters of oxidation and inflammation in aerobically trained individuals, and whether it could improve their performance. In a randomized, double-blinded, placebo controlled trial, 52 endurance trained men and women, similar in body fat, non-smokers, 20-50 years, received 1.85 g of zeolite per day for 12 weeks. Stool samples for determination of intestinal wall integrity biomarkers were collected. From blood, markers of redox biology, inflammation, and DNA damage were determined at the beginning and the end of the study. In addition, VO2max and maximum performance were evaluated at baseline and after 12 weeks of treatment. For statistical analyses a 2-factor ANOVA was used. At baseline both groups showed slightly increased stool zonulin concentrations above normal. After 12 weeks with zeolite zonulin was significantly (p zeolite group. There were no significant changes observed in the other measured parameters. Twelve weeks of zeolite supplementation exerted beneficial effects on intestinal wall integrity as indicated via decreased concentrations of the tight junction modulator zonulin. This was accompanied by mild anti-inflammatory effects in this cohort of aerobically trained subjects. Further research is needed to explore mechanistic explanations for the observations in this study.

  18. Measuring cognitive load during simulation-based psychomotor skills training: sensitivity of secondary-task performance and subjective ratings.

    Science.gov (United States)

    Haji, Faizal A; Khan, Rabia; Regehr, Glenn; Drake, James; de Ribaupierre, Sandrine; Dubrowski, Adam

    2015-12-01

    As interest in applying cognitive load theory (CLT) to the study and design of pedagogic and technological approaches in healthcare simulation grows, suitable measures of cognitive load (CL) are needed. Here, we report a two-phased study investigating the sensitivity of subjective ratings of mental effort (SRME) and secondary-task performance (signal detection rate, SDR and recognition reaction time, RRT) as measures of CL. In phase 1 of the study, novice learners and expert surgeons attempted a visual-monitoring task under two conditions: single-task (monitoring a virtual patient's heart-rate) and dual-task (tying surgical knots on a bench-top simulator while monitoring the virtual patient's heart-rate). Novices demonstrated higher mental effort and inferior secondary-task performance on the dual-task compared to experts (RRT 1.76 vs. 0.73, p = 0.012; SDR 0.27 vs. 0.97, p instructional design research are discussed.

  19. How academic career and habits related to the school environment influence on academic performance in the physical education subject

    Directory of Open Access Journals (Sweden)

    Vizuete Carrizosa, Manuel

    2012-01-01

    Full Text Available The main objective of this study was to analyze the degree of influence of some school habits and scholar trayectory on academic achievement in physical education (PE students in secondary education (ESO in the city of Badajoz. A total sample of 1197 students in compulsory secondary education 49.9% men, and 50.1% women, participated in the study. They spent a questionnaire filled out by the river questions about major school habits, of which eight variables were analyzed also included the final course in the subject of EF as a variable for analysis of academic performance. Through statistical analysis with ANOVA, Mann-Whitney U, and Kruskal Wallis H, there are significant differences in PE scores in all variables analyzed (p d».001, among which being repetitive, being truant, the time to read and study daily. In the variable environment perceived in class, there is a degree of significance (p d».05. Pupils who were repeaters, missing more classes or were delayed more times than read and studied less and earned a worse environment in their classes, are those who obtained poorer performance on EF.

  20. Objective and subjective evaluation of the performance of medical contact lenses fitted using a contact lens selection algorithm.

    Science.gov (United States)

    Visser, Esther-Simone; Wisse, Robert P L; Soeters, Nienke; Imhof, Saskia M; Van der Lelij, Allegonda

    2016-08-01

    To evaluate the performance of medical contact lenses (CLs) for a wide range of clinical indications. Prospective cross-sectional study. A total of 281 eyes were evaluated in 281 consecutive patients (≥18 years of age; CL use ≥3 months) who visited the contact lens service in a tertiary academic clinic for a scheduled follow-up visit. The main outcome measured were clinical indications for CL wear; CL type; change in corrected distance visual acuity (CDVA) with CL use; CL wearing duration; CL wearing time; subjective performance measured using a visual analog scale (VAS) questionnaire (score range: 0-100); and effectiveness of the lens-selection algorithm. Wearing CLs significantly improved CDVA compared to wearing spectacles (median change: -0.15 logMAR, range: 1.00 to -2.10; Plenses and users of soft lenses. These results underscore the importance of prescribing scleral lenses and the need for tertiary eye clinics to offer patients a variety of CL types. Copyright © 2016 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.

  1. Assessing performance of Botswana's public hospital system: the use of the World Health Organization Health System Performance Assessment Framework.

    Science.gov (United States)

    Seitio-Kgokgwe, Onalenna; Gauld, Robin Dc; Hill, Philip C; Barnett, Pauline

    2014-09-01

    Very few studies have assessed performance of Botswana public hospitals. We draw from a large research study assessing performance of the Botswana Ministry of Health (MoH) to evaluate the performance of public hospital system using the World Health Organization Health Systems Performance Assessment Framework (WHO HSPAF). We aimed to evaluate performance of Botswana public hospital system; relate findings of the assessment to the potential for improvements in hospital performance; and determine the usefulness of the WHO HSPAF in assessing performance of hospital systems in a developing country. This article is based on data collected from document analysis, 54 key informants comprising senior managers and staff of the MoH (N= 40) and senior officers from stakeholder organizations (N= 14), and surveys of 42 hospital managers and 389 health workers. Data from documents and transcripts were analyzed using content and thematic analysis while data analysis for surveys was descriptive determining proportions and percentages. The organizational structure of the Botswana's public hospital system, authority and decision-making are highly centralized. Overall physical access to health services is high. However, challenges in the distribution of facilities and inpatient beds create inequities and inefficiencies. Capacity of the hospitals to deliver services is limited by inadequate resources. There are significant challenges with the quality of care. While Botswana invested considerably in building hospitals around the country resulting in high physical access to services, the organization and governance of the hospital system, and inadequate resources limit service delivery. The ongoing efforts to decentralize management of hospitals to district level entities should be expedited. The WHO HSPAF enabled us to conduct a comprehensive assessment of the public hospital system. Though relatively new, this approach proved useful in this study.

  2. Family perception of the process of organ donation. Qualitative psychosocial analysis of the subjective interpretation of donor and nondonor families.

    Science.gov (United States)

    López Martínez, Jorge S; Martín López, María Jesús; Scandroglio, Barbara; Martínez García, José Manuel

    2008-05-01

    Family perception of organ donation has been explored by numerous authors using statements by the people who decided whether or not to donate the organs of a relative in a situation of brain death. Within this tradition, in this work, we analyze the discourse of six families who granted permission for organ donation and three who refused. We describe the process-based interpretation of this experience and identify psychosocial variables and processes that further our understanding of the decision finally adopted. We have identified two heuristics that guide family decision when organ donation is requested: the explicit or inferred will of the deceased and family attitudes to organ donation and transplant. It is postulated that the interaction of these two factors explains a large amount of the decisions made. We also hypothesize that a marked discrepancy between these two factors increases the importance of other aspects, especially the role of the transplant coordinator and of other healthcare personnel. These results support, at a social level, the implementation of transplant promotion programs; and at a healthcare level, the combined use of techniques of crisis intervention and attitude change.

  3. Psychomotor performance in relation to acute oral administration of Delta9-tetrahydrocannabinol and standardized cannabis extract in healthy human subjects.

    Science.gov (United States)

    Roser, Patrik; Gallinat, Jürgen; Weinberg, Gordon; Juckel, Georg; Gorynia, Inge; Stadelmann, Andreas M

    2009-08-01

    Abnormalities in psychomotor performance are a consistent finding in schizophrenic patients as well as in chronic cannabis users. The high levels of central cannabinoid (CB(1)) receptors in the basal ganglia, the cerebral cortex and the cerebellum indicate their implication in the regulation of motor activity. Based on the close relationship between cannabis use, the endogenous cannabinoid system and motor disturbances found in schizophrenia, we expected that administration of cannabinoids may change pattern of psychomotor activity like in schizophrenic patients. This prospective, double-blind, placebo-controlled cross-over study investigated the acute effects of cannabinoids on psychomotor performance in 24 healthy right-handed volunteers (age 27.9 +/- 2.9 years, 12 male) by comparing Delta(9)-tetrahydrocannabinol (Delta(9)-THC) and standardized cannabis extract containing Delta(9)-THC and cannabidiol. Psychomotor performance was assessed by using a finger tapping test series. Cannabis extract, but not Delta(9)-THC, revealed a significant reduction of right-hand tapping frequencies that was also found in schizophrenia. As to the pure Delta(9)-THC condition, left-hand tapping frequencies were correlated with the plasma concentrations of the Delta(9)-THC metabolite 11-OH-THC. These effects are thought to be related to cannabinoid actions on CB(1) receptors in the basal ganglia, the cerebral cortex and the cerebellum. Our data further demonstrate that acute CB(1) receptor activation under the cannabis extract condition may also affect intermanual coordination (IMC) as an index of interhemispheric transfer. AIR-Scale scores as a measure of subjective perception of intoxication were dose-dependently related to IMC which was shown by an inverted U-curve. This result may be due to functional changes involving GABAergic and glutamatergic neurotransmission within the corpus callosum.

  4. Job performance evaluations as gender barriers in male dominated organizations and occupations

    OpenAIRE

    Serghini Idrissi, Aïcha

    2016-01-01

    In an effort to make documented and fair decisions on work‐related opportunities and career progressions, job performance has emerged as a pivotal Human Resource tool due to its link to quasi‐every career‐related decision in the organization. Indeed, differences in performance evaluations can influence a number of career advancement variables. Performance measurement differences can impart both pay and promotions (Roth, Purvis & Bobko, 2012), lead to lower levels of job satisfaction (Colquitt...

  5. Organization and multidisciplinary work in an olympic high performance centers in USA

    OpenAIRE

    William J. Moreau, DC Dacbsp.; Dustin Nabhan, DC, Dacbsp.

    2012-01-01

    The organization and methodology of providing services to athletes through Olympic high performance centers varies among the National Olympic Committees (NOC). Between NOCs, provider composition and methodology for the delivery of services differs. Services provided typically include sports medicine and sports performance. NOCs may provide service through a university-based system or high performance centers. The United States Olympic Committee (USOC) provides services using multiple approach...

  6. Organization of ambulatory care provision: a critical determinant of health system performance in developing countries.

    Science.gov (United States)

    Berman, P

    2000-01-01

    Success in the provision of ambulatory personal health services, i.e. providing individuals with treatment for acute illness and preventive health care on an ambulatory basis, is the most significant contributor to the health care system's performance in most developing countries. Ambulatory personal health care has the potential to contribute the largest immediate gains in health status in populations, especially for the poor. At present, such health care accounts for the largest share of the total health expenditure in most lower income countries. It frequently comprises the largest share of the financial burden on households associated with health care consumption, which is typically regressively distributed. The "organization" of ambulatory personal health services is a critical determinant of the health system's performance which, at present, is poorly understood and insufficiently considered in policies and programmes for reforming health care systems. This article begins with a brief analysis of the importance of ambulatory care in the overall health system performance and this is followed by a summary of the inadequate global data on ambulatory care organization. It then defines the concept of "macro organization of health care" at a system level. Outlined also is a framework for analysing the organization of health care services and the major pathways through which the organization of ambulatory personal health care services can affect system performance. Examples of recent policy interventions to influence primary care organization--both government and nongovernmental providers and market structure--are reviewed. It is argued that the characteristics of health care markets in developing countries and of most primary care goods result in relatively diverse and competitive environments for ambulatory care services, compared with other types of health care. Therefore, governments will be required to use a variety of approaches beyond direct public provision

  7. Environmental impacts and production performances of organic agriculture in China: A monetary valuation.

    Science.gov (United States)

    Meng, Fanqiao; Qiao, Yuhui; Wu, Wenliang; Smith, Pete; Scott, Steffanie

    2017-03-01

    Organic agriculture has developed rapidly in China since the 1990s, driven by the increasing domestic and international demand for organic products. Quantification of the environmental benefits and production performances of organic agriculture on a national scale helps to develop sustainable high yielding agricultural production systems with minimum impacts on the environment. Data of organic production for 2013 were obtained from a national survey organized by the Certification and Accreditation Administration of China. Farming performance and environmental impact indicators were screened and indicator values were defined based on an intensive literature review and were validated by national statistics. The economic (monetary) values of farming inputs, crop production and individual environmental benefits were then quantified and integrated to compare the overall performances of organic vs. conventional agriculture. In 2013, organically managed farmland accounted for approximately 0.97% of national arable land, covering 1.158 million ha. If organic crop yields were assumed to be 10%-15% lower than conventional yields, the environmental benefits of organic agriculture (i.e., a decrease in nitrate leaching, an increase in farmland biodiversity, an increase in carbon sequestration and a decrease in greenhouse gas emissions) were valued at 1921 million RMB (320.2 million USD), or 1659 RMB (276.5 USD) per ha. By reducing the farming inputs, the costs saved was 3110 million RMB (518.3 million USD), or 2686 RMB (447.7 USD) per ha. The economic loss associated with the decrease in crop yields from organic agriculture was valued at 6115 million RMB (1019.2 million USD), or 5280 RMB (880 USD) per ha. Although they were likely underestimated because of the complex relationships among farming operations, ecosystems and humans, the production costs saved and environmental benefits of organic agriculture that were quantified in our study compensated substantially for the

  8. Analisa Pengaruh Leadership Style terhadap Firm Performance melalui Learning Organization dan Employee Satisfaction pada Perusahaan Sektor Manufaktur di Surabaya

    OpenAIRE

    Yulia, Yemima

    2015-01-01

    This study aimed to examine the direct and significant affect of leadership style to learning organization, leadership style to employee's satisfaction, learning organization to firm's performance, employee's satisfaction to firm's performance, leadership style to firm's performance, and learning organization to employee's satisfaction on manufacturing companies in Surabaya. This study used quantitative approach and the data were obtained through the distribution of questionnaire to manufactu...

  9. The responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact sound: a pilot study

    National Research Council Canada - National Science Library

    Seok Hyeon Yun; Sang Jin Park; Chang Sun Sim; Joo Hyun Sung; Ahra Kim; Jang Myeong Lee; Sang Hyun Lee; Jiho Lee

    2017-01-01

    ...) may have the different effects on the human’s body and mind. The purpose of this study is to assess the responses of subjective feeling, task performance ability, cortisol and HRV for the various types of floor impact...

  10. Study On Spatial Organization Of Device Performance South Sulawesi Provincial Government

    Directory of Open Access Journals (Sweden)

    Andi Amin Akhiruddin

    2015-01-01

    Full Text Available Abstract This study aims to describe the identification of regional Organization Structuring South Sulawesi Provincial Government under Government Regulation No. 38 of 2007 and Government Regulation No. 41 of 2007 knowing Planning Implications regional organization based on Government Regulation No. 38 of 2007 and Government Regulation No. 41 of 2007 on Performance government of South Sulawesi and analyze models of regional Organization Structuring South Sulawesi Provincial Government ideal based on Government Regulation No. 38 of 2007 and Government Regulation No. 41 of 2007. The method used is descriptive to assess the condition of the South Sulawesi provincial government organizations as a result of the implementation of Government Regulation No. 38 of 2007 and Government Regulation No. 41 Year 2007 on Organizational Structure Model of the Region of South Sulawesi Provincial Government and the resulting impact on South Sulawesi Provincial Government Performance. Data collection techniques used were interviews questionnaires and study documents analyzed by descriptive qualitative and quantitative in percentage. The results showed that the arrangement of the South Sulawesi Provincial Government Organizations related mass organizations using maximal patterns based on Government Regulation No. 41 of 2007 has not kept pace even found no addition of several fields and sub-sub-fields in the affairs handled by the regional work units of South Sulawesi Province. But seen from the Organization Structuring implications arising on the performance of the Government of South Sulawesi showed quite good results this is in line with some of the responses of respondents who said it was very appropriate views of some of the indicators used by the author in a variable rate Accountability Responsibility and Innovation as a parameter in describing South Sulawesi provincial government performance. Structuring the ideal model of the regional organization of South

  11. Performance Analysis of Organic Rankine-vapor Compression Ice Maker Utilizing Food Industry Waste Heat

    OpenAIRE

    Bing Hu; Yuanshu Cao; Weibin Ma

    2015-01-01

    To develop the organic Rankine-vapor compression ice maker driven by food industry exhaust gases and engine cooling water, an organic Rankine-vapor compression cycle system was employed for ice making and a thermodynamic model was developed and the effects of working fluid types, hot water temperature and condensation temperature on the system performance were analyzed and the ice making capacity from unit mass hot water and unit power waste heat were evaluated. The calculated results show th...

  12. Influence of containing of asphaltenes and naphthenic acids over organic deposition inhibitor performance

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Geiza E.; Mansur, Claudia R.E.; Pires, Renata V.; Passos, Leonardo B.; Lucas, Elizabete F. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Macromoleculas; Alvares, Dellyo R.S.; Gonzalez, Gaspar [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)

    2004-07-01

    Organic deposition is a serious problem confronted by the petroleum industry in Brazil and worldwide. Among the main petroleum components that may cause deposition problems are waxes and asphaltenes. This work aims at evaluating the influence of petroleum fractions (asphaltenes and naphthenic acids) on the organic deposition phenomenon as well as on organic deposition inhibitors performance. The influence of the organic fractions was evaluated by their ability to change wax crystals, to lower the pour point and to alter the initial wax appearance temperature. The efficiency of the additives was tested by pour point measurements. The results show that asphaltenes seem to act as organic deposition inhibitors, while naphthenic acids do not significantly change the system. Moreover, employing both of them produces no synergic effect. Among polymeric inhibitors, all of the chemically modified EVA copolymer presented better results than the non-modified commercial EVA copolymer. The best result was observed for EVA28C{sub 16}. (author)

  13. Underground verification of the large deflection performance of fibre reinforced shotcrete subjected to high stresses and convergence and to dynamic loading.

    CSIR Research Space (South Africa)

    Joughin, WC

    2002-04-01

    Full Text Available Committee Final Project Report Underground verification of the large deflection performance of fibre reinforced shotcrete subjected to high stresses and convergence and to dynamic loading W.C. Joughin, J.L. Human and P.J. Terbrugge Research agency...: Steffen, Robertson and Kirsten Project number: GAP 710 Date: April 2002 2 Executive summary The underground verification of the performance of fibre reinforced shotcrete, subject to high stresses, convergence and dynamic loading, was identified...

  14. "Using common work environment metrics to improve performance in healthcare organizations": the leadership imperative.

    Science.gov (United States)

    Higgins, E Michael

    2010-01-01

    The authors' proposition to use "common work environment metrics to improve performance in healthcare organizations" is a concept that has merit and whose time has come. Like all good ideas, however, it remains only a good idea until it is acted on and implemented successfully. Healthcare organizations are complex. That complexity must be accounted for in efforts to implement common metrics as a tool to incent fundamental change. The change management challenge is all about the quality of leadership in health organizations: the vision and visible commitment of senior leaders; the determination to support the transformation with effective accountability mechanisms; and the will to solve the limitations of front-line leadership capacity.

  15. Top Management Team Diversity and Company Performance: The moderating effect of Organization Life Cycle

    Directory of Open Access Journals (Sweden)

    Emil Velinov

    2016-12-01

    Full Text Available The research paper examines the moderating impact of Organizational Life Cycle on the relationship between Top Management Team Diversity and Company Performance. The study first elaborates and establishes the theoretical link between organization lifecycle and composition of management elites. Second, a quantitative empirical study is conducted to test the OLC stages moderating impact on the upper echelons diversity and firm performance of the top companies in the Czech Republic. A detailed procedure is developed to accurately classify organizations at different lifecycle stages, drawing extensively on existing literature and scales. Paper findings state that more mature the company becomes, more diversified the senior management is regardless the firm performance. Also, the industry dynamism impact has its own role in the relationship between the organization life cycle and senior management diversity which is expressed by the paper findings as well.

  16. Economic, ecological, and social performance of conventional and organic broiler production in the Netherlands.

    Science.gov (United States)

    Bokkers, E A M; de Boer, I J M

    2009-09-01

    1. In this study, we compared a conventional broiler production system keeping fast growing broilers with an organic broiler production system keeping slow growing broilers in the Netherlands, both managed by one person working a full time year (Full Time Equivalent, FTE). This comparison was based on a quantification of economic, ecological and social indicators. Indicators were quantified using scientific literature and national data sets. 2. The organic system performed better for the economic indicator net farm income per FTE than the conventional system. 3. Regarding ecological indicators, calculations showed a higher on-farm emission of ammonia per kg live weight for the organic system. Moreover, an organic system includes a higher risk for eutrophication per ha due to outdoor access. Emission of green house gasses, use of fossil fuels and use of land required for the production of one kg of live weight is higher for an organic than for a conventional system. This is mainly due to a lower feed conversion in organic production and use of organic feed. 4. The organic system performed better than the conventional system for the social indicators related to animal welfare time spent on walking, footpad lesions, mortality, and sound legs. Regarding the social indicator food safety was found that meat from an organic system contained less antibiotic residues and Salmonella contaminations but more Campylobacter contaminations than meat from a conventional system. 5. Changing from a conventional to an organic broiler production system, therefore, not only affects animal welfare, but also affects economic, ecological and other social issues. In this study, we ran into the situation that some information needed was lacking in literature and quantifications had to be based upon several sources. Therefore, an integrated on-farm assessment is needed, which can be used to develop a broiler production system that is economically profitable, ecologically sound, and

  17. Current state of the employee performance appraisal system in agricultural organizations in the Czech Republic

    Directory of Open Access Journals (Sweden)

    Kateřina Venclová

    2013-01-01

    Full Text Available Employee performance appraisal is one of the most important human resource management tools. The first part of the article concentrates on the theoretical background. The second part evaluates the results of the quantitative survey. The aim of the article is to evaluate the use of formal appraisal of employees in agricultural organizations in the Czech Republic and to test dependencies between selected qualitative characteristics. The results of the survey show that only 12.3% of agricultural organizations (n = 332 use formal appraisal of employees. They also confirm that the application of the formal appraisal of employees in agricultural organizations depends on the size of the agricultural organization (p-value 0.006, Phi coefficient 0.151 and the existence of a personnel department (p-value 0.000, Phi coefficient 0.210. 49.1% of agricultural organizations did not consider formal appraisal important. Only 5.8% of agricultural organizations that do not use any system of formal employee performance appraisal plan its implementation, despite the fact that currently people are considered to be the most important strategic asset of any organization for achieving a competitive advantage.

  18. Tribological performance evaluation of coated steels with TiNbCN subjected to tribo-chemical wear in Ringers solution

    Energy Technology Data Exchange (ETDEWEB)

    Caballero G, J.; Aperador, W. [Universidad Militar Nueva Granada, Volta Research Group, 101-80 Bogota (Colombia); Caicedo, J. C., E-mail: g.ing.materiales@gmail.com [Universidad del Valle, Tribology Polymers, Powder Metallurgy and Processing of Solid Recycled Research Group, Cali (Colombia)

    2016-11-01

    With the aim of generating solutions against the deterioration of the joint prostheses, it was studied the tribo-corrosive behavior of titanium niobium carbonitride (TiNbCN) deposited on stainless steel AISI 316 LVM using the technique of magnetron sputtering physical vapor deposition. The tests were performed in a balanced saline solution (Ringers solution) which represents the characteristics of the body fluids, using an equipment where the micro-abrasive wear is generated by the contact of micro particles in the system; the micro-abrasion-corrosion mechanism is described by means of the incorporation of an electrochemical cell consisting of three electrodes. Both the substrate and the coating, were subjected to micro-abrasive wear simultaneously with the electrochemical tests of Tafel polarization curves and electrochemical impedance spectroscopy (EIS); subsequently of the tests, the specimens were analyzed by optical microscopy and scanning electron microscopy characterizing the surface morphology. It was observed that the coating presents an increase in its corrosion and wear resistance with the presence of a simulated biological fluid. The samples were characterized via X-ray diffraction. (Author)

  19. Performance of Patient-Generated Subjective Global Assessment (PG-SGA) in Patients With Advanced Cancer in Palliative Care.

    Science.gov (United States)

    Wiegert, Emanuelly Varea Maria; Padilha, Patricia de Carvalho; Peres, Wilza Arantes Ferreira

    2017-10-01

    The purpose of this study was to evaluate the prognostic significance of the Patient-Generated Subjective Global Assessment (PG-SGA) in patients receiving palliative care for advanced cancer. The PG-SGA was used to assess nutrition status of 120 patients admitted to the Palliative Care Unit at the National Cancer Institute in Brazil. According to the PG-SGA, 94.2% (n = 113) of the patients were evaluated as malnourished. The PG-SGA evaluated that xerostomia was the only symptom associated with a short survival (odds ratio [OR], 2.54; 95% confidence interval [CI], 1.2-5.38; P = .014). Survival was found to be significantly higher in well-nourished (PG-SGA A) than malnourished (PG-SGA B [ P = .021] or C [ P = .013]) patients. Total PG-SGA score (hazard ratio [HR], 1.06; 95% CI, 1.001-1.09; P = .045) and Karnofsky Performance Status of 20%-30% (HR, 15.4; 95% CI, 1.63-92.9; P = .001) and 40%-50% (HR, 10.0; 95% CI, 1.22-64.9; P = .031) were found to be independent prognostic survival factors. The scored PG-SGA is an independent prognostic factor of survival and thus can be a useful tool for nutrition evaluation in palliative care.

  20. Objective and subjective outcome 3 years after synthetic transobturator nonabsorbable anterior mesh use in symptomatic advanced pelvic organ prolapse surgery

    Directory of Open Access Journals (Sweden)

    Tsia-Shu Lo

    2015-05-01

    Conclusion: The Perigee System gave a favorable result in both anatomical and subjective success rates with a low rate of mesh-related morbidities. The strength of the study reported here is its long-term follow up of a relatively large number of patients and the use of validated questionnaires. Limitations are that it is not a RCT; hence, selection and indication bias is unavoidable. The favorable outcome and low morbidities resulting from mesh use is from a single surgeon's perspective and may not be generalized to others.

  1. Accounting for External Turbulence of Logistics Organizations via Performance Measurement Systems

    DEFF Research Database (Denmark)

    Bühler, Andreas; Wallenburg, Carl Marcus; Wieland, Andreas

    2016-01-01

    distribution service performance. Originality/value: This paper is the first to introduce the concept of PMS design for turbulence to the literature and to show that it is relevant for supply chain risk management by fostering the capabilities and the performance of logistics organizations. Further....... Design/methodology/approach: Hypotheses are developed by integrating management accounting and strategic management perspectives into supply chain management and subsequently tested based on data from 431 logistics organizations (i.e. both logistics companies and internal logistics departments...

  2. Self-organization leads to supraoptimal performance in public transportation systems.

    Science.gov (United States)

    Gershenson, Carlos

    2011-01-01

    The performance of public transportation systems affects a large part of the population. Current theory assumes that passengers are served optimally when vehicles arrive at stations with regular intervals. In this paper, it is shown that self-organization can improve the performance of public transportation systems beyond the theoretical optimum by responding adaptively to local conditions. This is possible because of a "slower-is-faster" effect, where passengers wait more time at stations but total travel times are reduced. The proposed self-organizing method uses "antipheromones" to regulate headways, which are inspired by the stigmergy (communication via environment) of some ant colonies.

  3. Enhancing the performance of organic thin-film transistors using an organic-doped inorganic buffer layer

    Energy Technology Data Exchange (ETDEWEB)

    Su, Shui-Hsiang, E-mail: shsu@isu.edu.tw; Wu, Chung-Ming; Kung, Shu-Yi; Yokoyama, Meiso

    2013-06-01

    Organic thin-film transistors (OTFTs) with various buffer layers between the active layer and source/drain electrodes were investigated. The structure was polyethylene terephthalate/indium-tin oxide/poly(methyl methacrylate) (PMMA)/pentacene/buffer layer/Au (source/drain). V{sub 2}O{sub 5}, 4,4′,4″-tris{N,(3-methylpheny)-N-phenylamino}-triphenylamine (m-MTDATA) and m-MTDATA-doped V{sub 2}O{sub 5} films were utilized as buffer layers. The electrical performances of OTFTs in terms of drain current, threshold voltage, mobility and on/off current ratio have been determined. As a result, the saturation current of − 40 μA is achieved in OTFTs with a 10% m-MTDATA-doped V{sub 2}O{sub 5} buffer layer at a V{sub GS} of − 60 V. The on/off current ratio reaches 2 × 10{sup 5}, which is approximately double of the device without a buffer layer. The energy band diagrams of the electrode/buffer layer/pentacene were measured using ultra-violet photoelectron spectroscopy. The improvement in electrical characteristics of the OTFTs is attributable to the weakening of the interface dipole and the lowering of the barrier to enhance holes transportation from the source electrode to the active layer. - Highlights: • A buffer layer enhances the performance of organic thin-film transistors (OTFTs). • The buffer layer consists of organic-doped inorganic material. • Interface dipole is weakened at the active layer/electrodes interface of OTFTs.

  4. Using performance parameters, metrified performance objectives, and quality management assessments to improve the effectiveness of research organizations

    Energy Technology Data Exchange (ETDEWEB)

    Bodnarczuk, M

    1995-04-01

    This paper begins by raising the issue of whether the theoretical model of customer-suppliers-products-services usefully describes the activities of laboratory life, using a case study from Fermilab. After describing scientific activities as work, not volunteerism, I present a model that has four performance parameters that can be used to evaluate DOE-funded research laboratories: (1) Do they have a well-defined management system? (2) Are they doing good science? (3) Are they managing their resources effectively? (4) Are they responsive to their customers? From these four parameters I describe how to metrify performance objectives, then use them to evaluate research organizations. I describe these performance objectives within the context of views I have published elsewhere, and according to Stephen R. Covey`s metaphor of production/production capability (P/PC) balance in his book The 7 Habits of Highly Effective People.

  5. Self-organization of topological defects for a triangular-lattice magnetic dots array subject to a perpendicular magnetic field

    Directory of Open Access Journals (Sweden)

    R.S. Khymyn

    2014-09-01

    Full Text Available The regular array of magnetic particles (magnetic dots of the form of a two-dimensional triangular lattice in the presence of external magnetic field demonstrates complicated magnetic structures. The magnetic symmetry of the ground state for such a system is lower than that for the underlying lattice. Long range dipole-dipole interaction leads to a specific antiferromagnetic order in small fields, whereas a set of linear topological defects appears with the growth of the magnetic field. Self-organization of such defects determines the magnetization process for a system within a wide range of external magnetic fields.

  6. The Learning Organization Dimensions and Their Impact on Organizational Performance: Orange Jordan as a Case Study

    Directory of Open Access Journals (Sweden)

    Farid M. Qawasmeh

    2013-12-01

    Full Text Available The objective of this study is to measure the impact of learning organization's seven key dimensions (continuous learning opportunities, inquiry and dialogue, employee empowerment, establish systems to capture and share learning, connect the organization to its environment, collaboration and team learning, strategic leadership on organizational performance in Jordan Telecom. It also aims to figure out the type and magnitude of correlation among these seven dimensions as well as to assess the credibility of the questionnaire in a different context such as the Arab business environment. The sample size was (312 employees in this case study. The study results are as follows: The status of the learning organization dimensions was moderate (3.44 out of 5 on 5-step Likert scale. A positive statistical correlation exists among the seven learning organization dimensions as well as a positive statistical correlation with organizational performance. The questionnaire proved to be suitable in the Arab business context. Finally, the study recommends that organizations must consider the seven learning organizations’ dimensions due to their role in enhancing organizational performance and assuring a competitive edge.

  7. Effects of ISO 9001 on Non-Financial and Financial Performance in the Organizations: A Review

    OpenAIRE

    Neyestani, Behnam

    2017-01-01

    The main purpose of this paper was to specify the impact of ISO 9001 on financial and non-financial performance. For this aim, a comprehensive literature review was carried out on the scholarly published studies, which investigated empirically the effects of ISO 9001 standard on the organization's performance in different sectors. Subsequently, the ISO 9001 studies identified and selected carefully that were relevant to the objectives and criteria of the study with the aim of achieving the re...

  8. Forest products research and development organizations in a worldwide setting: A review of structure, governance, and measures of performance of organizations outside the United States

    Science.gov (United States)

    Paul V. Ellefson; Michael A. Kilgore; Kenneth E. Skog; Christopher D. Risbrudt

    2007-01-01

    Located in 23 countries, 40 forest-products research and development organizations outside the United States were reviewed in 2004 and 2005. The intent was to obtain a better understanding of how such organizations are structured and administered and their performance judged. Investing over $600 million annually, the 40 organizations employed 7,000 to 7,500 scientists...

  9. Critical Care Organizations: Business of Critical Care and Value/Performance Building.

    Science.gov (United States)

    Leung, Sharon; Gregg, Sara R; Coopersmith, Craig M; Layon, A Joseph; Oropello, John; Brown, Daniel R; Pastores, Stephen M; Kvetan, Vladimir

    2018-01-01

    New, value-based regulations and reimbursement structures are creating historic care management challenges, thinning the margins and threatening the viability of hospitals and health systems. The Society of Critical Care Medicine convened a taskforce of Academic Leaders in Critical Care Medicine on February 22, 2016, during the 45th Critical Care Congress to develop a toolkit drawing on the experience of successful leaders of critical care organizations in North America for advancing critical care organizations (Appendix 1). The goal of this article was to provide a roadmap and call attention to key factors that adult critical care medicine leadership in both academic and nonacademic setting should consider when planning for value-based care. Relevant medical literature was accessed through a literature search. Material published by federal health agencies and other specialty organizations was also reviewed. Collaboratively and iteratively, taskforce members corresponded by electronic mail and held monthly conference calls to finalize this report. The business and value/performance critical care organization building section comprised of leaders of critical care organizations with expertise in critical care administration, healthcare management, and clinical practice. Two phases of critical care organizations care integration are described: "horizontal," within the system and regionalization of care as an initial phase, and "vertical," with a post-ICU and postacute care continuum as a succeeding phase. The tools required for the clinical and financial transformation are provided, including the essential prerequisites of forming a critical care organization; the manner in which a critical care organization can help manage transformational domains is considered. Lastly, how to achieve organizational health system support for critical care organization implementation is discussed. A critical care organization that incorporates functional clinical horizontal and

  10. Evaporation-induced self-organization of inkjet-printed organic semiconductors on surface-modified dielectrics for high-performance organic transistors.

    Science.gov (United States)

    Lim, Jungah; Lee, Wihyoung; Kwak, Donghoon; Cho, Kilwon

    2009-05-05

    We demonstrate the influence of the surface wettability of a dielectric substrate on the crystalline microstructure and film morphology of an inkjet-printed organic semiconductor, namely 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS_PEN), using various self-assembled monolayers (SAMs). Self-aligned crystals with highly ordered crystalline structure are developed by printing on hydrophilic surfaces with high surface energy. It is found that the pinning of the contact line induces an outward convective flow as the evaporation proceeds, which results in the nucleation of crystals and the self-assembly of TIPS_PEN molecules from the periphery to the central region of the droplet. However, for hydrophobic surfaces with low surface energy, small agglomerates with random orientation of molecules are formed, which is induced by depinning of the contact line. The field-effect transistors fabricated with self-organized crystals printed on hydrophilic surfaces exhibit a high field-effect mobility of 0.15 cm(2) V(-1 )s(-1). These results indicate that the control of both the evaporation behavior and the contact line dynamics in a drying droplet plays an important role in the printing of organic semiconductor films with uniform morphology and desired molecular orientation for the direct-write fabrication of high-performance organic transistors.

  11. Photovoltaic effect on the performance enhancement of organic light-emitting diodes with planar heterojunction architecture

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Dan; Huang, Wei; Guo, Hao [State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054 (China); Wang, Hua, E-mail: wanghua001@tyut.edu.cn [Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology (TYUT), Taiyuan 030024 (China); Yu, Junsheng, E-mail: jsyu@uestc.edu.cn [State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054 (China)

    2017-04-15

    Highlights: • The photovoltaic effect on the performance of OLEDs was studied. • The device performance with different planar heterojunctions was investigated. • The mechanism relies on the overlap of electroluminescence and absorption spectrum. - Abstract: Organic light-emitting diodes (OLEDs) with planar heterojunction (PHJ) architecture consisting of photovoltaic organic materials of fullerene carbon 60 (C{sub 60}) and copper (II) phthalocyanine (CuPc) inserted between emitting unit and cathode were constructed, and the photovoltaic effect on OLEDs performance was studied. The electroluminescent (EL) characteristics and mechanism of device performance variation without and with different PHJs (herein including C{sub 60}/CuPc, CuPc/C{sub 60} and CuPc) were systematically investigated in red, green and blue OLEDs. Of the three combinations, OLEDs with C{sub 60}/CuPc showed the highest efficiency. It is revealed that the photovoltaic C{sub 60}/CuPc PHJ can absorb part of photons, which are radiated from emission zone, then form excitons, and dissociated into free charges. Consequently, the high device efficiency of OLEDs performance improvement was acquired. This research demonstrates that PHJ consisting of two n- and p-type photovoltaic organic materials could be a promising methodology for high performance OLEDs.

  12. Strategic Leadership And Organizational Performance In Not-For-Profit Organizations In Nairobi County In Kenya

    Directory of Open Access Journals (Sweden)

    Daniel Mwendwa Kitonga

    2015-08-01

    Full Text Available This paper sought to examine the link between strategic leadership practices and organizational performance in not-for-profit organizations. A survey assessing strategic leadership practice and organizational performance was completed by managers representing 328 not-for-profit organizations in Nairobi County in Kenya. The study established a significant positive relationship between strategic leadership variables and organizational performance. The results found R value of 0.730 and R2 value of 0.532 that is 53.2 of corresponding change in the Organizational Performance of NFPs for every change explained by predictor variables. The findings demonstrate that if not-for-profit leaders use well the strategic leadership they are likely to improve their organizational performance significantly. This paper examined the practice of strategic leadership in not-for-profit organizations in Nairobi County in Kenya. Future research that seeks to replicate these findings is warranted. This paper proposes the study of strategic leadership as a way of enhancing not-for-profit organizational performance.

  13. Comparison of Performance, Meat Lipids and Oxidative Status of Pigs from Commercial Breed and Organic Crossbreed

    Directory of Open Access Journals (Sweden)

    Giuseppe Martino

    2014-06-01

    Full Text Available The aim of this research was to determine the effect of rearing systems for pig production, as concerns performance, meat lipid content, the fatty acid profile, histidinic antioxidants, coenzyme Q10, and TBARs. One hundred pigs were assigned to one of three treatments: intensively reared commercial hybrid pig (I, free range commercial hybrid pig (FR or organically reared crossbred pig (O, according to organic EU Regulations. I pigs showed the best productive performance, but FR and O increased: C20:1n9, Δ9-desaturase (C18 and thioesterase indices in meat. Lipid, dipeptides and CoQ10 appeared correlated to glycolytic and oxidative metabolic pathways. We can conclude that all studied parameters were influenced by the rearing system used, and that differences were particularly evident in the O system, which produced leaner meat with higher oxidative stability. In this respect, the organic pig rearing system promotes and enhances biodiversity, environmental sustainability and food quality.

  14. WHAT MEANS HIGH PERFORMANCE WORK PRACTICES FOR HUMAN RESOURCES IN AN ORGANIZATION?

    Directory of Open Access Journals (Sweden)

    ANCA-IOANA MUNTEANU

    2014-10-01

    Full Text Available This paper focused on an overview of the different approaches in the literature to the concept of high performance work practices (HPWP, showing how this term evolves over time. Analyzing the literature, the significance of this term are seen as an evolved with customer requirements. Organizations need employees easily adaptable, able to meet customer needs in a timely manner. Therefore, organizations must on the one hand to satisfy their customers, on the other hand, employees, those in which firms can achieve their goals. Currently have placed particular emphasis on employee motivation, training, their involvement in decision making, delegation of authority, remuneration based on performance, rewarding loyalty. All above are considered HPWP and the AMO model is representative of these. The implementation of HPWP is a current problem for organizations wishing to achieve a sustainable competitive advantage. In this sense, this article may provide information of interest to business.

  15. Testing of Performance of Optical Fibers Under Irradiation in Intense Radiation Fields, When Subjected to Very High Temperatures

    Energy Technology Data Exchange (ETDEWEB)

    Blue, Thomas [The Ohio State Univ., Columbus, OH (United States); Windl, Wolfgang [The Ohio State Univ., Columbus, OH (United States); Dickerson, Bryan [Luna Innovations, Inc. (United States)

    2013-01-03

    The primary objective of this project is to measure and model the performance of optical fibers in intense radiation fields when subjected to very high temperatures. This research will pave the way for fiber optic and optically based sensors under conditions expected in future high-temperature gas-cooled reactors. Sensor life and signal-to-noise ratios are susceptible to attenuation of the light signal due to scattering and absorbance in the fibers. This project will provide an experimental and theoretical study of the darkening of optical fibers in high-radiation and high-temperature environments. Although optical fibers have been studied for moderate radiation fluence and flux levels, the results of irradiation at very high temperatures have not been published for extended in-core exposures. Several previous multi-scale modeling efforts have studied irradiation effects on the mechanical properties of materials. However, model-based prediction of irradiation-induced changes in silica's optical transport properties has only recently started to receive attention due to possible applications as optical transmission components in fusion reactors. Nearly all damage-modeling studies have been performed in the molecular-dynamics domain, limited to very short times and small systems. Extended-time modeling, however, is crucial to predicting the long-term effects of irradiation at high temperatures, since the experimental testing may not encompass the displacement rate that the fibers will encounter if they are deployed in the VHTR. The project team will pursue such extended-time modeling, including the effects of the ambient and recrystallization. The process will be based on kinetic MC modeling using the concept of amorphous material consisting of building blocks of defect-pairs or clusters, which has been successfully applied to kinetic modeling in amorphized and recrystallized silicon. Using this procedure, the team will model compensation for rate effects, and

  16. Effects of repeated snowboard exercise in virtual reality with time lags of visual scene behind body rotation on head stability and subjective slalom run performance in healthy young subjects.

    Science.gov (United States)

    Wada, Yoshiro; Nishiike, Suetaka; Kitahara, Tadashi; Yamanaka, Toshiaki; Imai, Takao; Ito, Taeko; Sato, Go; Matsuda, Kazunori; Kitamura, Yoshiaki; Takeda, Noriaki

    2016-11-01

    After repeated snowboard exercises in the virtual reality (VR) world with increasing time lags in trials 3-8, it is suggested that the adaptation to repeated visual-vestibulosomatosensory conflict in the VR world improved dynamic posture control and motor performance in the real world without the development of motion sickness. The VR technology was used and the effects of repeated snowboard exercise examined in the VR world with time lags between visual scene and body rotation on the head stability and slalom run performance during exercise in healthy subjects. Forty-two healthy young subjects participated in the study. After trials 1 and 2 of snowboard exercise in the VR world without time lag, trials 3-8 were conducted with 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6 s time lags of the visual scene that the computer creates behind board rotation, respectively. Finally, trial 9 was conducted without time lag. Head linear accelerations and subjective slalom run performance were evaluated. The standard deviations of head linear accelerations in inter-aural direction were significantly increased in trial 8, with a time lag of 0.6 s, but significantly decreased in trial 9 without a time lag, compared with those in trial 2 without a time lag. The subjective scores of slalom run performance were significantly decreased in trial 8, with a time lag of 0.6 s, but significantly increased in trial 9 without a time lag, compared with those in trial 2 without a time lag. Motion sickness was not induced in any subjects.

  17. Measuring Dynamic Knowledge and Performance at the Tactical Edges of Organizations: Assessing Acquisition Workforce Quality

    Science.gov (United States)

    2013-04-01

    knowledge, the greater its amplification and potential impact on positive performance becomes ( Nonaka , 1994). Measurements can be made using ordinal...Series. Monterey, CA: Naval Postgraduate School. Nonaka , I. (1994). A dynamic theory of organizational knowledge creation. Organization Science, 5(1), 14

  18. A Performance Enhanced Interactive Learning Workshop Model as a Supplement for Organic Chemistry Instruction

    Science.gov (United States)

    Phillips, Karen E. S.; Grose-Fifer, Jilliam

    2011-01-01

    In this study, the authors describe a Performance Enhanced Interactive Learning (PEIL) workshop model as a supplement for organic chemistry instruction. This workshop model differs from many others in that it includes public presentations by students and other whole-class-discussion components that have not been thoroughly investigated in the…

  19. Organization development and performance improvement planning: a case study of STFA ENERCOM

    OpenAIRE

    Düzgün, Alev

    1991-01-01

    Ankara : The Department of Management and the Graduate School of Business Administration of Bilkent Univ., 1991. Thesis (Master's) -- Bilkent University, 1991. Includes bibliographical references. Organization Development is a guidance of the Performance Improvement Planning Method, which is widely used to operationalize organizational change. The fundemental assumption of this study is that the Process Consultation Technique is an effective means to facilitate organiz...

  20. Health Care, Heal Thyself! An Exploration of What Drives (and Sustains) High Performance in Organizations Today

    Science.gov (United States)

    Wolf, Jason A.

    2008-01-01

    What happens when researching the radical unveils the simplest of solutions? This article tells the story of the 2007 ISPI Annual Conference Encore Presentation, Healthcare, Heal Thyself, sharing the findings of an exploration into high-performance health care facilities and their relevance to all organizations today. It shows how to overcome…

  1. A Conceptual Framework of Corporate and Business Ethics across Organizations: Structures, Processes and Performance

    Science.gov (United States)

    Svensson, Goran; Wood, Greg

    2011-01-01

    Purpose: The objective of this paper is to introduce and describe a conceptual framework of corporate and business ethics across organizations in terms of ethical structures, ethical processes and ethical performance. Design/methodology/approach: A framework is outlined and positioned incorporating an ethical frame of reference in the field of…

  2. Is Participation in Organized Leisure-Time Activities Associated with School Performance in Adolescence?

    NARCIS (Netherlands)

    Badura, Petr; Sigmund, Erik; Madarasova Geckova, Andrea; Sigmundova, Dagmar; Sirucek, Jan; van Dijk, Jitse P; Reijneveld, Sijmen A

    2016-01-01

    Background Organized leisure-time activities (OLTA) have been identified as a context suitable for improvement of school performance. This study aimed to assess the associations between participation in OLTA and school engagement, school-related stress, academic achievement and whether these

  3. Performance Monitoring: Evaluating an Organic Carbon-Limestone PRB for Treatment of Heavy Metals and Acidity

    Science.gov (United States)

    Since 2004, researchers from the U.S. EPA National Risk Management Research Laboratory (NRMRL) have annually evaluated performance of an organic carbon-limestone permeable reactive barrier (PRB) system installed in 2003 by EPA Region 6 at the Delatte Metals Superfund site in Ponc...

  4. Milk yield, udder health and reproductive performance in Swedish organic and conventional dairy herds.

    Science.gov (United States)

    Fall, Nils; Emanuelson, Ulf

    2009-11-01

    Organic dairy farming is an expanding segment of the dairy sector where cow management differs from the conventional model in many respects. Thus, a comparative evaluation of disease and welfare status in organically and conventionally managed dairy cows is required. Assessment of milk yield, udder health and reproductive performance (RP) was done in 20 organically and 20 conventionally managed Swedish dairy herds. In accordance with earlier findings we confirmed lower milk yield in organic cows. Udder health and RP were chosen as indicators of animal health in view of their clinical relevance and the availability of appropriate data bases providing good background knowledge for further animal health assessment. No obvious differences were found in the investigations of somatic cell count (SCC) profiles or time to veterinary-treated cases of mastitis between organically and conventional managed cows. Pregnancy success at first insemination, an appropriate measurement of RP with biological interpretation and background, did not reveal any difference between management types, whereas the hazard rate-ratio (HR) of having a calving-interval was significantly lower (HR=0.71) in organically managed cows. The calving-interval is an important financial determinator in dairy production, but it is not considered an optimal indicator of biologic relevance as it partially reflects farmer decisions. In conclusion, the organically managed cows in this study did not differ from conventionally managed cows in udder health or RP, with the exception of calving interval.

  5. The effects of using of mineral and organic toxin absorbents on broiler performance and internal organs weight in experimental aflatoxicosis

    Directory of Open Access Journals (Sweden)

    Behnam Heidarpour

    2016-04-01

    Full Text Available Introduction The occurrence of mycotoxins in foods and feeds is a problem of major concern in all over the world. Profitability of poultry production can be greatly affected due to the frequency of feed contamination and the detrimental effects of these toxins on the performance. Aflatoxins, a group of closely related and biologically active mycotoxins, are produced by strains of Aspergillus flavus and Aspergillus parasiticus. They commonly occur as natural contaminant of poultry feeds. Domestic animal species such as chickens, ducks, cattle and turkeys consuming sublethal doses of aflatoxins for several days developed a toxic syndrome in which liver damage was the most significant change. The biological effects of aflatoxins could be categorized into two groups, long term and short term effects. Long term effects included chronic toxicity, cancer, birth defects and genetic alterations. Aflatoxins affected all poultry species, although they generally take relatively high levels to cause mortality, low levels can be detrimental if continually fed. Material and Methods This study was conducted to determine the efficacy of mineral, organic toxin absorbents, humic acid and yeast cell wall on performance and internal organs weight of broilers in experimental aflatoxicosis. This study was conducted in a completely randomize design with 432 Ross-308 broilers with 9 treatments, 4 replicates and 12 broilers in each replicate. Treatments included diet without aflatoxin, 2: diet contaminated with aflatoxin, 3: diet contaminated with aflatoxin and supplemented with 0.20 Humic acid, 4: diet contaminated with aflatoxin and supplemented with 0.40 Humic acid, 5: diet contaminated with aflatoxin and supplemented with 0.60 Humic acid, 5: diet contaminated with aflatoxin and supplemented with 0.80 Humic acid, 6: diet contaminated with aflatoxin and supplemented with 0.80 Humic acid, 7: diet contaminated with aflatoxin and supplemented with 1.00 Humic acid, 8: diet

  6. High Performance, Low Operating Voltage n-Type Organic Field Effect Transistor Based on Inorganic-Organic Bilayer Dielectric System

    Science.gov (United States)

    Dey, A.; Singh, A.; Kalita, A.; Das, D.; Iyer, P. K.

    2016-04-01

    The performance of organic field-effect transistors (OFETs) fabricated utilizing vacuum deposited n-type conjugated molecule N,N’-Dioctadecyl-1,4,5,8-naphthalenetetracarboxylic diimide (NDIOD2) were investigated using single and bilayer dielectric system over a low-cost glass substrate. Single layer device structure consists of Poly (vinyl alcohol) (PVA) as the dielectric material whereas the bilayer systems contain two different device configuration namely aluminum oxide/Poly (vinyl alcohol) (Al2O3/PVA) and aluminum oxide/Poly (methyl mefhacrylate) (Al2O3/PMMA) in order to reduce the operating voltage and improve the device performance. It was observed that the devices with Al2O3/PMMA bilayer dielectric system and top contact aluminum electrodes exhibit excellent n-channel behaviour under vacuum compared to the other two structures with electron mobility value of 0.32 cm2/Vs, threshold voltages ~1.8 V and current on/off ratio ~104, operating under a very low voltage (6 V). These devices demonstrate highly stable electrical behaviour under multiple scans and low threshold voltage instability in vacuum condition even after 7 days than the Al2O3/PVA device structure. This low operating voltage, high performance OTFT device with bilayer dielectric system is expected to have diverse applications in the next generation of OTFT technologies.

  7. Organization and multidisciplinary work in an olympic high performance centers in USA

    Directory of Open Access Journals (Sweden)

    William J. Moreau, DC Dacbsp.

    2012-05-01

    Full Text Available The organization and methodology of providing services to athletes through Olympic high performance centers varies among the National Olympic Committees (NOC. Between NOCs, provider composition and methodology for the delivery of services differs. Services provided typically include sports medicine and sports performance. NOCs may provide service through a university-based system or high performance centers. The United States Olympic Committee (USOC provides services using multiple approaches through a hybrid model that includes three Olympic Training Centers, National Governing Bodies (NGB high performance centers and independent specialty care centers. Some highly developed National Governing Bodies have dedicated high performance training centers that serve only their sport. The model of sports medicine and sports performance programming utilized by the USOC Olympic Training Centers is described in this manuscript.

  8. Performance Evaluation of Research and Business Development: A Case Study of Korean Public Organizations

    Directory of Open Access Journals (Sweden)

    Jaehun Park

    2017-12-01

    Full Text Available This study presents data envelopment analysis (DEA-based systematic and simultaneous performance measures for research and business development (R&BD and internal processes. In particular, we focus on the relationship between the research and development (R&D process and business development (BD process in evaluating R&BD overall performance, and provide effective guidelines for relatively underperforming decision-making units to help them establish an optimal strategy to increase their performance. To that end, we develop a two-stage network DEA model based on performance measures by defining variables and transforming R&D and BD performances into a serial network structure. In addition, based on the proposed method, we present a practical application of R&BD performance measurement for Korean public organizations, specifically public research institutes and universities.

  9. THE MANAGERIAL CONCEPTS OF THE QUALITY AND PERFORMANCE AND THEIR INTEGRATION IN THE SPORTS ORGANIZATIONS

    Directory of Open Access Journals (Sweden)

    Jana Nová

    2014-06-01

    Full Text Available Introduction: This paper explores the possibilities of interconnection between the concepts of quality management systems and the concepts of the performance in sports organizations so to achieve the greater effectiveness and efficiency in terms of their operations. Therefore the paper provides an overview of the quality management systems and principles which are applicable in sports organizations and special attention is also paid to the analysis of the Balanced Scorecard principles in the sport context. Via the chosen methodology the author analyses the potential of this performance measurement tool for the integration into quality management system in sports organizations. Methods: In the paper the author used different methods of scientific research namely systematic observation, desk research, descriptive and causal method as well as the inductive and deductive method. The methods of analysis and synthesis of the existing perspectives were exploited in order to analyse and describe the interrelatedness between the different concepts. Results: The profound analysis and synthesis of the existing theoretical and practical tools applied in the quality of sport and performance of sport has proved the rightfulness of the assumptions that these two concepts can be based on their logic integrated in the managerial practice in one framework. Discussion: Implementing the integrated concept of the quality management and performance management in the sport organizations can be very efficient, considering the characteristics of the quality management systems and performance measurement. This approach can improve the realisation and results of the core processes in sport organizations and enhance their accountability towards the stakeholders´ requirements and expectations. References: Hoye R at al. (2012. Sport Management - principles and applications. Third edition. Routledge NY. Kaplan RE, Norton DP (1992. Harvard Business Review, 71-9. Nová J (2013

  10. Performance Evaluation of Waterproofing Membrane Systems Subject to the Concrete Joint Load Behavior of Below-Grade Concrete Structures

    National Research Council Canada - National Science Library

    Jaeyoung Song; Kyuhwan Oh; Byoungil Kim; Sangkeun Oh

    2017-01-01

    .... In this type of environment, they become subject to higher water pressure. The concrete material of the structures is exposed to wet conditions for longer periods of time, which makes the proper adhesion of waterproofing membranes difficult...

  11. Organizations and social worker wellbeing: the intra-organizational context of practice and its impact on a practitioner's subjective well-being.

    Science.gov (United States)

    Shier, Micheal L; Graham, John R

    2013-01-01

    This study aimed to better understand the varied factors that contribute to social worker subjective well-being (SWB) (the social science concept for happiness). Using qualitative methods of inquiry 19 social workers who reported having low to medium levels of workplace and profession satisfaction were interviewed to assess those factors within their lives that they perceived as impacting their well-being. One thematic category from the analysis was aspects of the intraorganizational context of workplaces that can impact social worker SWB. Respondents identified interpersonal workplace relationships, decision-making processes, management/supervisory dynamics, workload and workplace expectations, access to resources and infrastructure support, and inter-organizational relationships as key intra-organizational factors contributing to their overall wellbeing. In conclusion, these findings have practical application within organizations for structured policies and unstructured practices to improve social worker subjective well-being.

  12. Enhancing learning, innovation, adaptation, and sustainability in health care organizations: the ELIAS performance management framework.

    Science.gov (United States)

    Persaud, D David

    2014-01-01

    The development of sustainable health care organizations that provide high-quality accessible care is a topic of intense interest. This article provides a practical performance management framework that can be utilized to develop sustainable health care organizations. It is a cyclical 5-step process that is premised on accountability, performance management, and learning practices that are the foundation for a continuous process of measurement, disconfirmation, contextualization, implementation, and routinization This results in the enhancement of learning, innovation, adaptation, and sustainability (ELIAS). Important considerations such as recognizing that health care organizations are complex adaptive systems and the presence of a dynamic learning culture are necessary contextual factors that maximize the effectiveness of the proposed framework. Importantly, the ELIAS framework utilizes data that are already being collected by health care organizations for accountability, improvement, evaluation, and strategic purposes. Therefore, the benefit of the framework, when used as outlined, would be to enhance the chances of health care organizations achieving the goals of ongoing adaptation and sustainability, by design, rather than by chance.

  13. The significance of organic carbon and nutrient export from peatland-dominated landscapes subject to disturbance, a stoichiometric perspective

    Directory of Open Access Journals (Sweden)

    S. Waldron

    2009-03-01

    Full Text Available The terrestrial-aquatic interface is a crucial environment in which to consider the fate of exported terrestrial carbon in the aquatic system. Here the fate of dissolved organic carbon (DOC may be controlled by nutrient availability. However, peat-dominated headwater catchments are normally of low nutrient status and thus there is little data on how DOC and nutrient export co-varies. We present nutrient and DOC data for two UK catchments dominated by peat headwaters. One, Whitelee, is undergoing development for Europe's largest windfarm. Glen Dye by comparison is relatively undisturbed. At both sites there are significant linear relationships between DOC and soluble reactive phosphorus and nitrate concentrations in the drainage waters. However, inter-catchment differences exist. Changes in the pattern of nutrient and carbon export at Whitelee reveal that landscape disturbance associated with windfarm development impacts the receiving waters, and that nutrient export does not increase in a stoichiometric manner that will promote increase in microbial biomass but rather supports aquatic respiration. In turn greater CO2 efflux may prevail. Hence disturbance of terrestrial carbon stores may impact the both the aquatic and gaseous carbon cycle. We suggest estimates of aquatic carbon export should inform the decision-making process prior to development in ecosystems and catchments with high terrestrial carbon storage.

  14. EFFECT OF THE USE OF MOS AND ORGANIC ACIDS IN PERFORMANCE PIGLETS

    Directory of Open Access Journals (Sweden)

    L. Vargas

    2017-02-01

    Full Text Available The production chain of swine has been developed to meet the consumer market , seeking a more lean meat and produced cleanly. Faced with this demand , key areas of swine as genetics, nutrition , health , ambience , animal welfare, management of costs and environmental management are increasingly studied and debated to the organs concerned . Have advances in the field of nutrition has also contributed to a cleaner animal production through the use of enhancers efficiency as prebiotics and organic acids in the diets of pigs as potential substitutes for conventional growth promoters . The mannan oligosaccharides ( MOS along with organic acids , are able to maintain the integrity of the digestive tract , by benefiting the multiplication of beneficial bacteria and also in the specific case of MOS , act as adsorbents of pathogenic bacteria , preventing their adhesion in the intestinal epithelium and causing their elimination . Since these effects improve the absorption of nutrients with gains in production rates . Given the above , the objective of this study is to evaluate the effects of MOS and organic acid in the performance parameters of piglets during 15-30 Kg The experiment will be conducted in the UEP on Swine Campuses Two Neighbors - UTFPR . Crusaders 18 pigs with an initial average weight of 15kg with 50 days of age , distributed in a completely randomized design with two treatments will be used : T1 - basal ration T2 - ration + 0.2% MOS + organic acid , with 3 replications and 3 animals per experimental unit . The parameters evaluated were weight gain , feed intake , feed conversion , stool consistency and feed cost per kg of produced pig . There was no difference ( P > 0.05 on growth performance and fecal consistency between treatments . However , the cost per kg pig was highest in treatment 2 (with additives compared to Treatment 1 (control. In the conditions of the present study was conducted , it can be concluded that the use of MOS and

  15. PERFORMANCE, CARCASS YIELD AND LITTER QUALITY OF BROILERS RAISED ON LITTERS TREATED WITH MICRO-ORGANISMS

    Directory of Open Access Journals (Sweden)

    Dayane Prado da Cruz

    2013-03-01

    Full Text Available The present paper aimed at evaluating the effect of adding beneficial micro-organisms to the litters on litter quality, performance and carcass yield for broilers. A total of 240 one-day chicks were used, and randomly distributed in blocks with four treatments and four replications. The following treatments were carried out in the housing: Treatment 1 – Control with weekly spraying of water on the litters; Treatment 2 – Litter treated with a mixture of inoculated and fermented meal by micro-organisms and weekly spraying of water; Treatment 3 – Litter treated by weekly spraying of micro-organisms; Treatment 4 – Litter treated with the same mixture of meals from treatment two and weekly spraying of micro-organisms. Performance was evaluated by the feed consumption, weight gain, feed conversion, viability and carcass, breast and leg yield. From litter samples, pH, dry matter, ashes and nitrogen were evaluated. No differences were found among the treatments. In the conditions the animals were raised, it can be concluded that the treatment on the litter does not affect performance, carcass yield and quality of the litter for broilers.

  16. An expert performance approach to examining factors contributing to academic success in organic chemistry

    Science.gov (United States)

    Nandagopal, Kiruthiga

    Successful completion of the introductory course in organic chemistry is a prerequisite for many graduate and professional science programs, yet the failure rate for this course is notoriously high. To date, there have been few studies examining factors contributing to academic success in organic chemistry. This study demonstrates that the online, longitudinal methods used by investigations of expert performance can examine and successfully identify factors contributing to academic success at the college level. Sixty-four students enrolled in introductory organic chemistry during the Fall 2007 and Spring 2008 semesters completed motivation questionnaires, interviews, diaries, and think-aloud reading and problem-solving tasks at three different points across a semester. Measures of spatial ability, general ability, and background preparation were also collected. Each measure was analyzed to determine significant differences between groups differing in grade-point average (GPA) prior to the start of the course and to identify predictors of organic chemistry grade. Variables measuring background preparation, problem-solving strategies and studying strategies were found to be the best predictors of academic success in organic chemistry. Implications for instruction in organic chemistry and effective studying behaviors are discussed.

  17. Coordination Incentives, Performance Measurement and Resource Allocation in Public Sector Organizations

    DEFF Research Database (Denmark)

    Dietrichson, Jens

    Why are coordination problems common when public sector organizations share responsibilities, and what can be done to mitigate such problems? This paper uses a multi-task principal-agent model to examine two related reasons: the incentives to coordinate resource allocation and the difficulties...... of measuring performance. The analysis shows that when targets are set individually for each organization, the resulting incentives normally induce inefficient resource allocations. If the principal impose shared targets, this may improve the incentives to coordinate but the success of this instrument depends...

  18. Brazilian Solidarity Economy Rural Organizations: Validating Performance Evaluation Criteria Based on Decision Makers’ Perception

    Directory of Open Access Journals (Sweden)

    Leomara Battisti Telles

    2017-06-01

    Full Text Available The majority of the world’s current economic models are destructive and unsustainable. Little progress has been made in recent years to change this, despite significant discussion surrounding the theme. In this context, the solidarity economy presents itself as an alternative that seeks environmental and economic sustainability, as well as social promotion. In Brazil, Solidarity Economy Rural Organizations (SEROs began in the 1970s. As with organizations from other sectors, they should be evaluated in relation to their ability to achieve social and solidarity objectives. Thus, this study aims to present a theoretical model of performance evaluation indicators for Solidarity Economy Rural Organizations in Southern Brazil based on the perceptions of the organizations’ decision makers. SERO representatives interviewed were asked to rank 36 criteria commonly used in performance evaluations, which were grouped into six dimensions: (1 legal documents and standards; (2 valuing of human work; (3 technology and economy; (4 acknowledgment of women; (5 preservation of and respect for nature; and (6 cooperation and solidarity. The results show that SERO representatives consider that performance evaluations should adhere to the Brazilian Declaration of Solidarity Economy Principles. Additionally, we identified a greater concern with criteria correlated to technical and legal aspects than criteria related to solidarity and humanitarianism. These results are relevant for the maintenance of rural solidarity economy organization as they provide a base for developing processes and tools to be used in SERO performance evaluations; such processes are necessary to maintain sustainable development in low-income economies, and to enable solidarity organizations to reach their objectives.

  19. Modeling the performance limits of novel microcantilever heaters for volatile organic compound detection

    Science.gov (United States)

    Jahangir, Ifat; Koley, Goutam

    2017-01-01

    We present a theoretical model estimating the performance limits of novel AlGaN/GaN heterostructure based microcantilever heater sensors to perform advanced volatile organic compound (VOC) detection and mixture analysis. Operating without any specific surface functionalization or treatment; these devices utilize the strong surface polarization of AlGaN as well as the unique device geometries, to perform selective detection of analytes based on their latent heat of evaporation and molecular dipole moment over a wide concentration range. The presented model incorporates heat transfer, Joule heating, thermal expansion and evaporative heat loss mechanisms, to predict device behaviors such as temperature profiles and sensing performance limits under various steady-state and transient test conditions. In addition, the versatility of the proposed model enables us to successfully predict the capability of the device to perform mixture analysis, and provides guidelines to further optimize the device properties to achieve a limit of detection in sub-ppm concentration.

  20. The Search is on for Coherent Performance Measurement in Healthcare Organizations. Has Quebec Reached a Crossroads?

    Science.gov (United States)

    Fache, Philippe; Sicotte, Claude; Minvielle, Étienne

    2016-05-01

    This research looks back at a 10-year period (2004-2014) to understand the development and outlook for healthcare organization performance measurement in the Quebec healthcare system, in an attempt to objectivize relationships within the configuration of its principal institutional actors. This is a qualitative study combining the use of official publications and fieldwork based on 13 semi-directed interviews, conducted in 2014, with informers in key performance measurement positions within the Quebec healthcare system. Performance measurement has generated tensions, both internally between different branches of the Department of Health and externally against a strong coalition of external institutional actors, which were defending a shared homogeneous vision of performance. Four major types of political power plays, owing to the power struggles around performance models and indicators, converged around the same implicit issue of the need to attain greater legitimacy in order to impose an authoritative frame of reference. Copyright © 2016 Longwoods Publishing.

  1. Organização do trabalho, subjetividade e confiabilidade na atividade de mergulho profundo Labor organization, subjectivity and reliability on the deep-sea diving activity

    Directory of Open Access Journals (Sweden)

    Marcelo Gonçalves Figueiredo

    2005-08-01

    Full Text Available Neste artigo destacamos a dimensão coletiva do trabalho na atividade de mergulho profundo e os componentes subjetivos aí implicados, por considerarmos que tais aspectos são fundamentais para pensar a segurança e a confiabilidade nos sistemas sociotécnicos complexos. Tomamos como material empírico privilegiado a investigação inicial conduzida por Figueiredo (2001 acerca das condições em que se desenvolve esta atividade na bacia de Campos (região norte do Estado do Rio de Janeiro, que é permanentemente terceirizada e está inserida na indústria petrolífera offshore. Ao desconsiderar algumas das chamadas regras de trabalho fundamentais, assim como o papel decisivo que estas desempenham no curso das tarefas, o modo de organização do trabalho vigente cria obstáculos sérios à coesão e à consolidação dos coletivos, minando o potencial de cooperação aí presente, com graves riscos para a confiabilidade do sistema analisado e para a saúde (mental e segurança dos mergulhadores.In this paper, we focus on the collective dimension of the deep-sea diving work and, specially, the subjective compounds implicated in such activity, because we consider such aspects so fundamental to think the security and the reliability of the complex social-technical systems. We took as empirical field the investigation conducted by Figueiredo (2001 concerning the conditions in which this activity is developed in the Campos Oil Fields (Northern region of the state of Rio de Janeiro, that is permanently outsourced and inserted in the offshore oil industry. Our analysis showed that when some of the so-called fundamental rules of work are not considered, such as the decisive role that these rules perform in the execution of the tasks, the way of labor organization is presented, creates serious obstacles to cohesion and to consolidation of the work collectives, mining the inner cooperation potential, with serious risks to the reliability of the analyzed

  2. Kaiser Permanente's performance improvement system, Part 4: Creating a learning organization.

    Science.gov (United States)

    Schilling, Lisa; Dearing, James W; Staley, Paul; Harvey, Patti; Fahey, Linda; Kuruppu, Francesca

    2011-12-01

    In 2006, recognizing variations in performance in quality, safety, service, and efficiency, Kaiser Permanente leaders initiated the development of a performance improvement (PI) system. Kaiser Permanente has implemented a strategy for creating the systemic capacity for continuous improvement that characterizes a learning organization. Six "building blocks" were identified to enable Kaiser Permanente to make the transition to becoming a learning organization: real-time sharing of meaningful performance data; formal training in problem-solving methodology; workforce engagement and informal knowledge sharing; leadership structures, beliefs, and behaviors; internal and external benchmarking; and technical knowledge sharing. Putting each building block into place required multiple complex strategies combining top-down and bottom-up approaches. Although the strategies have largely been successful, challenges remain. The demand for real-time meaningful performance data can conflict with prioritized changes to health information systems. It is an ongoing challenge to teach PI, change management, innovation, and project management to all managers and staff without consuming too much training time. Challenges with workforce engagement include low initial use of tools intended to disseminate information through virtual social networking. Uptake of knowledge-sharing technologies is still primarily by innovators and early adopters. Leaders adopt new behaviors at varying speeds and have a range of abilities to foster an environment that is psychologically safe and stimulates inquiry. A learning organization has the capability to improve, and it develops structures and processes that facilitate the acquisition and sharing of knowledge.

  3. Key Element Performance In Occupational Safety And Health Management System In Organization (A Literature

    Directory of Open Access Journals (Sweden)

    Agus Salim Nuzaihan Aras

    2016-01-01

    Full Text Available Setting an effective safety and health management system is crucial in order to reduce problem relating to accident and ill in management organizational. It is involve with multiple level of management and stakeholders who empower the organization to the management in handling the safety and health cases and issues in organizational. It is necessary to prepare a well knowledge about safety and health management systems and preparing the framework for setting a certain scale in measuring its performance in this area. The successful or failure of management does showing the capability of the organization in delivering the responsible to management levels [1]. The problem in safe work issues and practices cause by the management commitment and involvement that create improper safety program and procedures, and this crisis keep continuing till present [2]. This paper describes about key element of safety and health management system and measuring the performance in order to get an effective management system in organization that describes the process in achieving effectiveness in management. The literature review will be conducted through the data collection from research findings and defined the strong character of key element in which focusing on measuring performance. A guide on key element performance in occupational safety and health management system is specifically drawn to prepare for a future research.

  4. Significant alterations in reported clinical practice associated with increased oversight of organ transplant center performance.

    Science.gov (United States)

    Schold, Jesse D; Arrington, Charlotte J; Levine, Greg

    2010-09-01

    In the past several years, emphasis on quality metrics in the field of organ transplantation has increased significantly, largely because of the new conditions of participation issued by the Centers for Medicare and Medicaid Services. These regulations directly associate patients' outcomes and measured performance of centers with the distribution of public funding to institutions. Moreover, insurers and marketing ventures have used publicly available outcomes data from transplant centers for business decision making and advertisement purposes. We gave a 10-question survey to attendees of the Transplant Management Forum at the 2009 meeting of the United Network for Organ Sharing to ascertain how centers have responded to the increased oversight of performance. Of 63 responses, 55% indicated a low or near low performance rating at their center in the past 3 years. Respondents from low-performing centers were significantly more likely to indicate increased selection criteria for candidates (81% vs 38%, P = .001) and donors (77% vs 31%, P vs 52%, P = .007). Among respondents indicating lost insurance contracts (31%), these differences were also highly significant. Based on respondents' perceptions, outcomes of performance evaluations are associated with significant changes in clinical practice at transplant centers. The transplant community and policy makers should practice vigilance that performance evaluations and regulatory oversight do not inadvertently lead to diminished access to care among viable candidates or decreased transplant volume.

  5. Chemical principles underpinning the performance of the metal–organic framework HKUST-1

    Science.gov (United States)

    Hendon, Christopher H.

    2015-01-01

    A common feature of multi-functional metal–organic frameworks is a metal dimer in the form of a paddlewheel, as found in the structure of Cu3(btc)2 (HKUST-1). The HKUST-1 framework demonstrates exceptional gas storage, sensing and separation, catalytic activity and, in recent studies, unprecedented ionic and electrical conductivity. These results are a promising step towards the real-world application of metal–organic materials. In this perspective, we discuss progress in the understanding of the electronic, magnetic and physical properties of HKUST-1, representative of the larger family of Cu···Cu containing metal–organic frameworks. We highlight the chemical interactions that give rise to its favourable properties, and which make this material well suited to a range of technological applications. From this analysis, we postulate key design principles for tailoring novel high-performance hybrid frameworks. PMID:28706713

  6. Chemical principles underpinning the performance of the metal-organic framework HKUST-1.

    Science.gov (United States)

    Hendon, Christopher H; Walsh, Aron

    2015-07-15

    A common feature of multi-functional metal-organic frameworks is a metal dimer in the form of a paddlewheel, as found in the structure of Cu3(btc)2 (HKUST-1). The HKUST-1 framework demonstrates exceptional gas storage, sensing and separation, catalytic activity and, in recent studies, unprecedented ionic and electrical conductivity. These results are a promising step towards the real-world application of metal-organic materials. In this perspective, we discuss progress in the understanding of the electronic, magnetic and physical properties of HKUST-1, representative of the larger family of Cu···Cu containing metal-organic frameworks. We highlight the chemical interactions that give rise to its favourable properties, and which make this material well suited to a range of technological applications. From this analysis, we postulate key design principles for tailoring novel high-performance hybrid frameworks.

  7. Implementation of a new emergency medical communication centre organization in Finland - an evaluation, with performance indicators

    Directory of Open Access Journals (Sweden)

    Castrén Maaret

    2011-03-01

    Full Text Available Abstract Background There is a great variety in how emergency medical communication centers (EMCC are organized in different countries and sometimes, even within countries. Organizational changes in the EMCC have often occurred because of outside world changes, limited resources and the need to control costs, but historically there is often a lack of structured evaluation of these organization changes. The aim of this study was to evaluate if the performance in emergency medical dispatching changed in a smaller community outside Helsinki after the emergency medical call centre organization reform in Finland. Methods A retrospective observational study was conducted in the EMCC in southern Finland. The data from the former system, which had municipality-based centers, covered the years 2002-2005 and was collected from several databases. From the new EMCC, data was collected from January 1 to May 31, 2006. Identified performance indicators were used to evaluate and compare the old and new EMCC organizations. Results A total of 67 610 emergency calls were analyzed. Of these, 54 026 were from the municipality-based centers and 13 584 were from the new EMCC. Compared to the old municipality-based centers the new EMCC dispatched the highest priority to 7.4 percent of the calls compared to 3.6 percent in the old system. The high priority cases not detected by dispatchers increased significantly (p Conclusion After implementation of a new EMCC organization in Finland the percentage and number of high priority calls increased. There was a trend, but no statistically significant increase in the emergency medical dispatchers' ability to detect patients with life-threatening conditions despite structured education, regular evaluation and standardization of protocols in the new EMCC organization.

  8. The nonprofit marketing process and fundraising performance of humanitarian organizations: empirical analysis

    Directory of Open Access Journals (Sweden)

    Ljiljana Najec Čačija

    2016-12-01

    Full Text Available This paper links the fundraising success of nonprofit organizations to their marketing process. Financial and non-financial dimensions of fundraising performance are included in the study, as to demonstrate both aspects of the intended outcomes. The empirical part of the paper is based on research focusing on Croatian humanitarian organizations and employs the Structural Equation Modeling (SEM methodology to assess the hypotheses regarding the positive influence of the nonprofit marketing activities on two dimensions of fundraising performance. In addition, the paper discusses and empirically verifies the influence of fundraising feedback on the (redefinition of marketing activities. Implications for nonprofit marketing and management practice(s are discussed, along with recommendations for future research.

  9. Does CSR Improve Organization Financial Performance? Evidence from Nigeria Using Triangulation Analysis

    Directory of Open Access Journals (Sweden)

    Taiwo Adewale MURITALA

    2013-12-01

    Full Text Available The study examines the impact of corporate social responsibility (CSR on organizational financial performance of some selected banks in Nigeria using time series of annual data of ten banks over the period of 1990 to 2010. Pearson Correlation coefficient was used to analyse the correlation that exist between CSR and organization performance while collected data were regressed using Ordinary Least Square technique. Findings indicate a positive relationship between CSR cost and Profit after Tax (PAT. The study therefore recommends that top management in an organization must ensure prudence in its spending and get committed to any social activity it wants to embark upon and allow the members of the public to associate such an activity or activities.

  10. Effect of ZnO:Cs2CO3 on the performance of organic photovoltaics

    Science.gov (United States)

    2014-01-01

    We demonstrate a new solution-processed electron transport layer (ETL), zinc oxide doped with cesium carbonate (ZnO:Cs2CO3), for achieving organic photovoltaics (OPVs) with good operational stability at ambient air. An OPV employing the ZnO:Cs2CO3 ETL exhibits a fill factor of 62%, an open circuit voltage of 0.90 V, and a short circuit current density of −6.14 mA/cm2 along with 3.43% power conversion efficiency. The device demonstrated air stability for a period over 4 weeks. In addition, we also studied the device structure dependence on the performance of organic photovoltaics. Thus, we conclude that ZnO:Cs2CO3 ETL could be employed in a suitable architecture to achieve high-performance OPV. PMID:25045340

  11. Improved uniformity in high-performance organic photovoltaics enabled by (3-aminopropyl)triethoxysilane cathode functionalization.

    Science.gov (United States)

    Luck, Kyle A; Shastry, Tejas A; Loser, Stephen; Ogien, Gabriel; Marks, Tobin J; Hersam, Mark C

    2013-12-28

    Organic photovoltaics have the potential to serve as lightweight, low-cost, mechanically flexible solar cells. However, losses in efficiency as laboratory cells are scaled up to the module level have to date impeded large scale deployment. Here, we report that a 3-aminopropyltriethoxysilane (APTES) cathode interfacial treatment significantly enhances performance reproducibility in inverted high-efficiency PTB7:PC71BM organic photovoltaic cells, as demonstrated by the fabrication of 100 APTES-treated devices versus 100 untreated controls. The APTES-treated devices achieve a power conversion efficiency of 8.08 ± 0.12% with histogram skewness of -0.291, whereas the untreated controls achieve 7.80 ± 0.26% with histogram skewness of -1.86. By substantially suppressing the interfacial origins of underperforming cells, the APTES treatment offers a pathway for fabricating large-area modules with high spatial performance uniformity.

  12. Measuring Cognitive Load during Simulation-Based Psychomotor Skills Training: Sensitivity of Secondary-Task Performance and Subjective Ratings

    Science.gov (United States)

    Haji, Faizal A.; Khan, Rabia; Regehr, Glenn; Drake, James; de Ribaupierre, Sandrine; Dubrowski, Adam

    2015-01-01

    As interest in applying cognitive load theory (CLT) to the study and design of pedagogic and technological approaches in healthcare simulation grows, suitable measures of cognitive load (CL) are needed. Here, we report a two-phased study investigating the sensitivity of subjective ratings of mental effort (SRME) and secondary-task performance…

  13. Using high-performance work practices in health care organizations: a perspective for nursing.

    Science.gov (United States)

    McAlearney, Ann Scheck; Robbins, Julie

    2014-01-01

    Studies suggest that the use of high-performance work practices (HPWPs) may help improve quality in health care. We interviewed 67 administrators and clinicians across 5 health care organizations and found that the use of HPWPs was valued and salient for nurses. Communication appeared particularly important to facilitate HPWP use. Enhancing our understanding of HPWP use may help improve the work environment for nurses while also increasing care quality.

  14. The ritual of coffee break inside organizations: toward social efficiency and/or performance?

    Directory of Open Access Journals (Sweden)

    Cécilia BRASSIER-RODRIGUES

    2015-07-01

    Full Text Available This research examines a non-formal ritual practice – the coffee break – inside organizations. Based on a survey conducted on 12 marketing and commercial teams in France, we analyse if the coffee break has an objective of social efficiency or of performance. While solving this question, our results also reveal the importance of seniority in the observed behaviors, suggesting that it symbolizes an informal level of authority in front of the formal authority symbolized by the status.

  15. The relationship between participation in extracurricular organizations and the academic performance and retention of college freshman

    OpenAIRE

    Boling, Bruce

    1996-01-01

    The purpose of this study was to investigate differences in academic performance and persistence among freshman participating in fraternities, corps of cadets, and athletics in comparison to matched samples of non-members. The study showed that, on average, students were adversely affected by participation in athletics and fraternities when sex, race, college, major, and academic ability were controlled. There was no evidence to conclude that participation in these organizations had any consi...

  16. Performance specifications for technology development: Application for characterization of volatile organic compounds in the environment

    Energy Technology Data Exchange (ETDEWEB)

    Carpenter, S.E.; Doskey, P.V.; Erickson, M.D.; Lindahl, P.C.

    1994-07-01

    This report contains information about technology development for the monitoring and remediation of environmental pollution caused by the release of volatile organic compounds. Topics discussed include: performance specification processes, gas chromatography, mass spectrometer, fiber-optic chemical sensors, infrared spectroscopy, Raman spectroscopy, piezoelectric sensors and electrochemical sensors. These methods are analyzed for their cost efficiency, accuracy, and the ability to meet the needs of the customer.

  17. Work function tuning for high-performance solution-processed organic photodetectors with inverted structure.

    Science.gov (United States)

    Saracco, Emeline; Bouthinon, Benjamin; Verilhac, Jean-Marie; Celle, Caroline; Chevalier, Nicolas; Mariolle, Denis; Dhez, Olivier; Simonato, Jean-Pierre

    2013-12-03

    Organic photodetectors with inverted structure are fabricated by solution process techniques. A very thin interfacing layer of polyethyleneimine leads to a homogenous interface with low work function. The devices exhibit excellent performances, in particular in terms of low dark current density, wide range linearity, high detectivity, and remarkable stability in ambient air without encapsulation. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  18. Current state of the employee performance appraisal system in agricultural organizations in the Czech Republic

    OpenAIRE

    Kateřina Venclová; Martina Königová; Jiří Fejfar

    2013-01-01

    Employee performance appraisal is one of the most important human resource management tools. The first part of the article concentrates on the theoretical background. The second part evaluates the results of the quantitative survey. The aim of the article is to evaluate the use of formal appraisal of employees in agricultural organizations in the Czech Republic and to test dependencies between selected qualitative characteristics. The results of the survey show that only 12.3% of agricultural...

  19. Effects of organic mineral dietary supplementation on production performance and egg quality of white layers

    Directory of Open Access Journals (Sweden)

    JIM Fernandes

    2008-03-01

    Full Text Available This trial aimed at evaluating the effect of organic trace mineral supplementation of commercial layer diets on productive performance and egg quality. One-hundred-ninety-two Hy Line W36 white 69-w-old layers were distributed into a completely randomized design with three treatments, and eight replicates, with eight birds each. Treatments consisted of a basal diet supplemented with inorganic trace minerals (R1, and two others experimental diets containing 0.250 ppm (R2 and 0.500 ppm (R3 of an organic source of zinc, manganese, and selenium. Feed intake (g/bird/day, feed conversion ratio (kg/dozen egg and kg/kg egg, egg weight (g, egg production (%, thin and cracked eggshells (%, specific gravity (g/mL, Haugh Units, total egg solids (%, yolk yield, white and shell yields (%, eggshell thickness, and egg Se content were evaluated Tukey's test analyzed differences among means at 5% of probability using PROC GLM in SAS (2000. Although not significant as compared to the non-supplemented diet, improvements on relative cracked-plus-thin shells were observed with the use of organic mineral blend. The addition of the organic blend to the diet at 0.250 kg/ton resulted in (p<0.05 higher total egg solids. Also, as compared to eggs from control group, fresh and dried yolk yields were higher with the dietary inclusion of the organic mineral blend at 0.250 and 0.500 kg/ton.

  20. Innovative architecture design for high performance organic and hybrid multi-junction solar cells

    Science.gov (United States)

    Li, Ning; Spyropoulos, George D.; Brabec, Christoph J.

    2017-08-01

    The multi-junction concept is especially attractive for the photovoltaic (PV) research community owing to its potential to overcome the Schockley-Queisser limit of single-junction solar cells. Tremendous research interests are now focused on the development of high-performance absorbers and novel device architectures for emerging PV technologies, such as organic and perovskite PVs. It has been predicted that the multi-junction concept is able to boost the organic and perovskite PV technologies approaching the 20% and 30% benchmarks, respectively, showing a bright future of commercialization of the emerging PV technologies. In this contribution, we will demonstrate innovative architecture design for solution-processed, highly functional organic and hybrid multi-junction solar cells. A simple but elegant approach to fabricating organic and hybrid multi-junction solar cells will be introduced. By laminating single organic/hybrid solar cells together through an intermediate layer, the manufacturing cost and complexity of large-scale multi-junction solar cells can be significantly reduced. This smart approach to balancing the photocurrents as well as open circuit voltages in multi-junction solar cells will be demonstrated and discussed in detail.

  1. Measuring the effect of e-business on organizational performance in project based organizations

    Directory of Open Access Journals (Sweden)

    Soheil Sadi-Nezhad

    2017-12-01

    Full Text Available Recently, there have been significant development on e-business and nearly all business partners try to offer their products and services via internet. One primary question for the implementation of e-business is to measure the effect of this new facility on supply chain in project based organizations. Although e-business may not directly influence on organizational performance, it definitely influences on unifying customers and suppliers, which yields to a better performance of organizations. This study performs a study to measure the indirect effect of e-business on project based organizational performance. The proposed study of this paper designs a questionnaire and distributes it among 140 professional experts in different industries in province of Ontario, Canada. The survey examines different hypotheses for a possible correlation between e-business and integrated suppliers, e-business and customers, integrated customers and suppliers with organizational performance. The results of this survey indicate a positive relationship between all these components either directly or indirectly.

  2. The performance model of dynamic virtual organization (VO) formations within grid computing context

    Energy Technology Data Exchange (ETDEWEB)

    Han Liangxiu [National eScience Centre, School of Physics, University of Edinburgh, EH8 9AA (United Kingdom)], E-mail: lhan@nesc.ac.uk

    2009-05-30

    Grid computing aims to enable 'resource sharing and coordinated problem solving in dynamic, multi-institutional virtual organizations (VOs)'. Within the grid computing context, successful dynamic VO formations mean a number of individuals and institutions associated with certain resources join together and form new VOs in order to effectively execute tasks within given time steps. To date, while the concept of VOs has been accepted, few research has been done on the impact of effective dynamic virtual organization formations. In this paper, we develop a performance model of dynamic VOs formation and analyze the effect of different complex organizational structures and their various statistic parameter properties on dynamic VO formations from three aspects: (1) the probability of a successful VO formation under different organizational structures and statistic parameters change, e.g. average degree; (2) the effect of task complexity on dynamic VO formations; (3) the impact of network scales on dynamic VO formations. The experimental results show that the proposed model can be used to understand the dynamic VO formation performance of the simulated organizations. The work provides a good path to understand how to effectively schedule and utilize resources based on the complex grid network and therefore improve the overall performance within grid environment.

  3. Validation of a rapid type 1 diabetes autoantibody screening assay for community-based screening of organ donors to identify subjects at increased risk for the disease.

    Science.gov (United States)

    Wasserfall, C; Montgomery, E; Yu, L; Michels, A; Gianani, R; Pugliese, A; Nierras, C; Kaddis, J S; Schatz, D A; Bonifacio, E; Atkinson, M A

    2016-07-01

    The Network for Pancreatic Organ donors with Diabetes (nPOD) programme was developed in response to an unmet research need for human pancreatic tissue obtained from individuals with type 1 diabetes mellitus and people at increased risk [i.e. autoantibody (AAb)-positive] for the disease. This necessitated the establishment of a type 1 diabetes-specific AAb screening platform for organ procurement organizations (OPOs). Assay protocols for commercially available enzyme-linked immunosorbent assays (elisas) determining AAb against glutamic acid decarboxylase (GADA), insulinoma-associated protein-2 (IA-2A) and zinc transporter-8 (ZnT8A) were modified to identify AAb-positive donors within strict time requirements associated with organ donation programmes. These rapid elisas were evaluated by the international islet AAb standardization programme (IASP) and used by OPO laboratories as an adjunct to routine serological tests evaluating donors for organ transplantation. The rapid elisas performed well in three IASPs (2011, 2013, 2015) with 98-100% specificity for all three assays, including sensitivities of 64-82% (GADA), 60-64% (IA-2A) and 62-68% (ZnT8A). Since 2009, nPOD has screened 4442 organ donors by rapid elisa; 250 (5·6%) were identified as positive for one AAb and 14 (0.3%) for multiple AAb with 20 of these cases received by nPOD for follow-up studies (14 GADA+, two IA-2A(+) , four multiple AAb-positive). Rapid screening for type 1 diabetes-associated AAb in organ donors is feasible, allowing for identification of non-diabetic, high-risk individuals and procurement of valuable tissues for natural history studies of this disease. © 2016 British Society for Immunology.

  4. Performance Evaluation of Waterproofing Membrane Systems Subject to the Concrete Joint Load Behavior of Below-Grade Concrete Structures

    OpenAIRE

    Jaeyoung Song; Kyuhwan Oh; Byoungil Kim; Sangkeun Oh

    2017-01-01

    Below-grade structures such as parking lots, underground subway tunnels, and basements are growing in scale and reaching deeper below-ground levels. In this type of environment, they become subject to higher water pressure. The concrete material of the structures is exposed to wet conditions for longer periods of time, which makes the proper adhesion of waterproofing membranes difficult. Joint movements from increased structural settlement, thermal expansion/shrinkage, and physical loads from...

  5. Side-Chain Effects on Energy-Level Modulation and Device Performance of Organic Semiconductor Acceptors in Organic Solar Cells.

    Science.gov (United States)

    Luo, Zhenghui; Zhao, Yuan; Zhang, Zhi-Guo; Li, Guanghao; Wu, Kailong; Xie, Dongjun; Gao, Wei; Li, Yongfang; Yang, Chuluo

    2017-10-04

    Two new non-fullerene acceptors, IDTC and IDTO, were designed and synthesized for the application in organic solar cells (OSCs). Compared with IDTC, the introduction of electron-donating alkoxy groups of IDTO leads to a higher LUMO level with a slightly blue-shifted absorption. Using the polymer PBDB-T as donor and the two small molecules as acceptors in the conventional device structure, the IDTC-based OSC exhibits a power conversion efficiency (PCE) of 9.35% with an open-circuit voltage (VOC) of 0.917 V, a short-circuit current density (JSC) of 16.56 mA cm-2, and a fill factor (FF) of 61.61%. For the OSC based on IDTO, a higher PCE of 10.02% with a VOC of 0.943 V, a JSC of 16.25 mA cm-2, and an FF of 65.41% are obtained. The more balanced μe/μh, evident aggregation, and phase separation contribute to the higher FF for the device based on IDTO. The increased JSC for the device based on PBDB-T:IDTC can be attributed to the red-shifted and stronger absorption of the PBDB-T:IDTC blend film. These results indicate fine-tuning the electronic energy and absorption of non-fullerene acceptors is feasible to improve the performance of OSCs.

  6. Silicon Carbide (SiC) Device and Module Reliability, Performance of a Loop Heat Pipe Subjected to a Phase-Coupled Heat Input to an Acceleration Field

    Science.gov (United States)

    2016-05-01

    magnitude and direction, which are generated from a transitory and spatial acceleration vector field and their impact on the dynamical performance of two...Heat Input to an Acceleration Field Kirk L. Yerkes (AFRL/RQQI) and James D. Scofield (AFRL/RQQE) Flight Systems Integration Branch (AFRL/RQQI...CARBIDE (SiC) DEVICE AND MODULE RELIABILITY Performance of a Loop Heat Pipe Subjected to a Phase-Coupled Heat Input to an Acceleration Field 5a

  7. Being a SportParent: Buffering the effect of your talented child's poor performance on his or her subjective well-being

    NARCIS (Netherlands)

    Van Yperen, N.W.

    1998-01-01

    The focus of this longitudinal study was the process that can explain why poor performance (as assessed by the coach) may lead to less subjective well-being. The participants were 59 young, highly skilled male soccer players (mean age: 15.6 years) attending a prestigious soccer school. In line with

  8. Perceptions, Attitudes and Institutional Factors That Influence Academic Performance of Visual Arts Students in Ghana's Senior High School Core Curriculum Subjects

    Science.gov (United States)

    Opoku-Asare, Nana Afia; Tachie-Menson, Akosua; Essel, Harry Barton

    2015-01-01

    Senior High School (SHS) students in Ghana are required to pass all core and elective curricula subjects in the West Africa Senior School Certificate Examination (WASSCE) to qualify for higher education. Unfortunately, many Visual Arts students perform poorly or fail in English, Mathematics, Integrated Science and Social Studies, which constitute…

  9. Attitudes, subjective norms, and intention to perform routine oral examination for oropharyngeal candidiasis as perceived by primary health-care providers in Nairobi Province

    NARCIS (Netherlands)

    Koyio, L.N.; Kikwilu, E.N.; Mulder, J.; Frencken, J.E.F.M.

    2013-01-01

    Objectives: To assess attitudes, subjective norms, and intentions of primary health-care (PHC) providers in performing routine oral examination for oropharyngeal candidiasis (OPC) during outpatient consultations. Methods: A 47-item Theory of Planned Behaviour-based questionnaire was developed and

  10. Examining the Effects of Perceived Relevance and Work-Related Subjective Well-Being on Individual Performance for Co-Op Students

    Science.gov (United States)

    Drewery, Dave; Pretti, T. Judene; Barclay, Sage

    2016-01-01

    The purpose of this study was to examine the relationships between co-op students' perceived relevance of their work term, work-related subjective well-being (SWB), and individual performance at work. Data were collected using a survey of co-op students (n = 1,989) upon completion of a work term. Results of regression analyses testing a…

  11. A study on effects of organizational structure on performance of research organizations

    Directory of Open Access Journals (Sweden)

    Seyed Mahdi Mousavi

    2013-02-01

    Full Text Available Organizational structure plays an important role on survival of any business units and it is important to understand different factors influencing it. In this paper, we present an empirical study to learn the effects of three parameters including formality, concentration and complexity on organizational performance. The proposed study of this paper is implemented for one of research-based organization located in city of Qom, Iran. There were 120 employees working for this organization and the proposed study of this paper has selected a sample of 100 people, designed, and distributed a questionnaire among them. The proposed study uses two methods of regression analysis as well as structural equation modeling to study the impacts of three variables on organizational performance. The results show that there are some positive and meaningful relationship between formality and concentration from one side and organizational performance from the other side. In addition, there is a meaningful and negative relationship between complexity and organizational performance. The results of structural equation modeling are also consistent with the results of structural equation modeling.

  12. [Balanced scorecard for performance measurement of a nursing organization in a Korean hospital].

    Science.gov (United States)

    Hong, Yoonmi; Hwang, Kyung Ja; Kim, Mi Ja; Park, Chang Gi

    2008-02-01

    The purpose of this study was to develop a balanced scorecard (BSC) for performance measurement of a Korean hospital nursing organization and to evaluate the validity and reliability of performance measurement indicators. Two hundred fifty-nine nurses in a Korean hospital participated in a survey questionnaire that included 29-item performance evaluation indicators developed by investigators of this study based on the Kaplan and Norton's BSC (1992). Cronbach's alpha was used to test the reliability of the BSC. Exploratory and confirmatory factor analysis with a structure equation model (SEM) was applied to assess the construct validity of the BSC. Cronbach's alpha of 29 items was .948. Factor analysis of the BSC showed 5 principal components (eigen value >1.0) which explained 62.7% of the total variance, and it included a new one, community service. The SEM analysis results showed that 5 components were significant for the hospital BSC tool. High degree of reliability and validity of this BSC suggests that it may be used for performance measurements of a Korean hospital nursing organization. Future studies may consider including a balanced number of nurse managers and staff nurses in the study. Further data analysis on the relationships among factors is recommended.

  13. Strategies for Improving the Performance of Sensors Based on Organic Field-Effect Transistors.

    Science.gov (United States)

    Wu, Xiaohan; Mao, Shun; Chen, Junhong; Huang, Jia

    2018-01-29

    Organic semiconductors (OSCs) have been extensively studied as sensing channel materials in field-effect transistors due to their unique charge transport properties. Stimulation caused by its environmental conditions can readily change the charge-carrier density and mobility of OSCs. Organic field-effect transistors (OFETs) can act as both signal transducers and signal amplifiers, which greatly simplifies the device structure. Over the past decades, various sensors based on OFETs have been developed, including physical sensors, chemical sensors, biosensors, and integrated sensor arrays with advanced functionalities. However, the performance of OFET-based sensors still needs to be improved to meet the requirements from various practical applications, such as high sensitivity, high selectivity, and rapid response speed. Tailoring molecular structures and micro/nanofilm structures of OSCs is a vital strategy for achieving better sensing performance. Modification of the dielectric layer and the semiconductor/dielectric interface is another approach for improving the sensor performance. Moreover, advanced sensory functionalities have been achieved by developing integrated device arrays. Here, a brief review of strategies used for improving the performance of OFET sensors is presented, which is expected to inspire and provide guidance for the design of future OFET sensors for various specific and practical applications. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  14. Quality_Family Deployment: A New Perspective in Determining Priority Importance for Improving Work Performance in Organization

    Science.gov (United States)

    Fatimah, P. L. Rika; Jemain, A. A.; Ibrahim, K.; Nasir, S. Mohammad; Anuar, M. A. Khairul

    2009-01-01

    Determining priority importance is a matter of concerns among the organization to improve their performance. One of the important aspects that should be considered by the organization is management of human resources, comprising of members who have their own family life. In this paper, we deliver a new perspective for organization to provide…

  15. Fabrication of organic semiconducting materials and high-performance organic thin-film transistors based on electron-irradiated polystyrene

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Hyeok Moo

    2011-02-15

    It was discovered that non-luminescent polystyrene (PS) can be converted to luminescent materials whose color can be changed in a wide visible range by electron irradiation. After the analyses of electron-irradiated PS, it was found that polycyclic aromatic hydrocarbons are produced by the irradiation and these PAHs are the origin of the luminescence from the electron-irradiated polymer. Based on the finding, a straightforward approach to produce desired light-emitting nanoarchitectures and nanopatterns only by irradiating an electron beam to the polymer was presented. In particular, the top-down irradiation approach provides a powerful tool to fabricate a variety of interesting nanoarchitectures when combined with bottom-up approaches; PS nanostructures prepared by self-assembling techniques can be directly transformed to luminescent nanostructures by electron irradiation while keeping their pristine morphologies. Light-emitting materials are widely used for optical, photonic, chemical and biomedical devices and a rapid progress in the devices requires well-defined luminescent nanoarchitectures. The approach presented here will be useful for a wide range of research fields including optics, photonics, chemistry, and biologics. On the other hand, a very simple but effective approach to produce high-performance rubrene organic thin-film transistors (OTFTs) with characteristics better than amorphous silicon TFTs was presented. Only by an abrupt heating process, high-quality crystalline rubrene semiconductor thin films that have almost ideal structures for OTFTs are created. The produced crystalline thin films consist of highly ordered, uniaxially oriented single-crystalline grains with large average sizes and the grains are interconnected with one another to form continuous films over the whole dielectric surfaces. Such high-quality crystalline rubrene thin films are remarkably rapidly produced in just 30 sec through this approach. Moreover, the increase of carrier

  16. Strategies to Achieve High-Performance White Organic Light-Emitting Diodes

    Directory of Open Access Journals (Sweden)

    Lirong Zhang

    2017-12-01

    Full Text Available As one of the most promising technologies for next-generation lighting and displays, white organic light-emitting diodes (WOLEDs have received enormous worldwide interest due to their outstanding properties, including high efficiency, bright luminance, wide viewing angle, fast switching, lower power consumption, ultralight and ultrathin characteristics, and flexibility. In this invited review, the main parameters which are used to characterize the performance of WOLEDs are introduced. Subsequently, the state-of-the-art strategies to achieve high-performance WOLEDs in recent years are summarized. Specifically, the manipulation of charges and excitons distribution in the four types of WOLEDs (fluorescent WOLEDs, phosphorescent WOLEDs, thermally activated delayed fluorescent WOLEDs, and fluorescent/phosphorescent hybrid WOLEDs are comprehensively highlighted. Moreover, doping-free WOLEDs are described. Finally, issues and ways to further enhance the performance of WOLEDs are briefly clarified.

  17. Steady enhancement of organic solar cell performance by doping phosphorescent iridium complex

    Science.gov (United States)

    Huang, Jiang; Yu, Junsheng; Wang, Hong; Jiang, Yadong

    2010-10-01

    Efficient organic photovoltaic cells based on a phosphor of (t-bt)2Ir(acac) were demonstrated. Also, the photovoltaic performances of organic solar cells with a device structure of ITO/(t-bt)2Ir(acac):CuPc (doping rate R=0 and 0.25)/C60/BCP/Ag were determined based on the current density (J)-voltage (V) curves of a series of devices. The absorption spectra of doping layer (t-bt)2Ir(acac):CuPc and C60 films on quart substrates were measured to gain a direct insight of absorption ability of dopant (t-bt)2Ir(acac). Then, revised optical transfer matrix theory was adopted to study inner effect of dopant (t-bt)2Ir(acac) on the enhanced device performance, which shows that (t-bt)2Ir(acac) dopant increases the light density of doping layer by reorganizing the light distribution inside organic films. However, the light absorption efficiency ηA of device with R=0.25 does not improve. According to the unchanging value of open circuit voltage VOC and similar fill factor FF, the assumption that two devices with R=0 and 0.25 possess similar charge carrier collection efficiency ηCTηCC can be made. Thus, the inner enhancement of exciton diffusion efficiency ηED is discovered with the assistance of longer triplet exciton diffusion length of (t-bt)2Ir(acac).

  18. Nitrogen removal performance of anaerobic ammonia oxidation (ANAMMOX) in presence of organic matter.

    Science.gov (United States)

    Zhu, Weiqiang; Zhang, Peiyu; Yu, Deshuang; Dong, Huiyu; Li, Jin

    2017-06-01

    A sequencing batch reactor (SBR) was used to test the nitrogen removal performance of anaerobic ammonium oxidation (ANAMMOX) in presence of organic matter. Mesophilic operation (30 ± 0.5 °C) was performed with influent pH 7.5. The results showed, independent of organic matter species, ANAMMOX reaction was promoted when COD was lower than 80 mg/L. However, specific ANAMMOX activity decreased with increasing organic matter content. Ammonium removal efficiency decreased to 80% when COD of sodium succinate, sodium potassium tartrate, peptone and lactose were 192.5, 210, 225 and 325 mg/L, respectively. The stoichiometry ratio resulting from different OM differed largely and R 1 could be as an indicator for OM inhibition. When COD concentration was 240 mg/L, the loss of SAA resulting from lactose, peptone, sodium potassium tartrate and sodium succinate were 28, 36, 50 and 55%, respectively. Sodium succinate had the highest inhibitory effect on SAA. When ANAMMOX process was used to treat wastewater containing OM, the modified Logistic model could be employed to predict the NRE max .

  19. Implementing high-performance work practices in healthcare organizations: qualitative and conceptual evidence.

    Science.gov (United States)

    McAlearney, Ann Scheck; Robbins, Julie; Garman, Andrew N; Song, Paula H

    2013-01-01

    Studies across industries suggest that the systematic use of high-performance work practices (HPWPs) may be an effective but underused strategy to improve quality of care in healthcare organizations. Optimal use of HPWPs depends on how they are implemented, yet we know little about their implementation in healthcare. We conducted 67 key informant interviews in five healthcare organizations, each considered to have exemplary work practices in place and to deliver high-quality care, as part of an extensive study of HPWP use in healthcare. We analyzed interview transcripts inductively and deductively to examine why and how organizations implement HPWPs. We used an evidence-based model of complex innovation adoption to guide our exploration of factors that facilitate HPWP implementation. We found considerable variability in interviewees' reasons for implementing HPWPs, including macro-organizational (strategic level) and micro-organizational (individual level) reasons. This variability highlighted the complex context for HPWP implementation in many organizations. We also found that our application of an innovation implementation model helped clarify and categorize facilitators of HPWP implementation, thus providing insight on how these factors can contribute to implementation effectiveness. Focusing efforts on clarifying definitions, building commitment, and ensuring consistency in the application of work practices may be particularly important elements of successful implementation.

  20. Cognitive performance and perceived effort in speech processing tasks: effects of different noise backgrounds in normal-hearing and hearing-impaired subjects.

    Science.gov (United States)

    Larsby, Birgitta; Hällgren, Mathias; Lyxell, Björn; Arlinger, Stig

    2005-03-01

    Cognitive tests of speech understanding were administered (presented as text, or in auditory or audiovisual modality) and perceived effort was rated. This was done in four background conditions: in silence, and in three types of noise (S/N=+10 dB) varying in temporal structure and meaningfulness. Four groups of 12 subjects each (young/elderly with normal hearing and young/elderly with hearing impairment) participated. The presence of noise had a negative effect on accuracy and speed of performance in the speech processing tasks, and resulted in higher scores of perceived effort, even when the stimuli were presented as text. Differences in performance between noise conditions existed. In the subjective scores, the noise with temporal variations, but without meaningful content, was the most disruptive of the three noise conditions. In the objective scores the hearing-impaired subjects showed poorer results in noise with temporal variations. The elderly subjects were more distracted by noise with temporal variations, and especially by noise with meaningful content. In noise, all subjects, particularly those with impaired hearing, were more dependent upon visual cues than in the quiet condition.

  1. [Investigation of team processes that enhance team performance in business organization].

    Science.gov (United States)

    Nawata, Kengo; Yamaguchi, Hiroyuki; Hatano, Toru; Aoshima, Mika

    2015-02-01

    Many researchers have suggested team processes that enhance team performance. However, past team process models were based on crew team, whose all team members perform an indivisible temporary task. These models may be inapplicable business teams, whose individual members perform middle- and long-term tasks assigned to individual members. This study modified the teamwork model of Dickinson and McIntyre (1997) and aimed to demonstrate a whole team process that enhances the performance of business teams. We surveyed five companies (member N = 1,400, team N = 161) and investigated team-level-processes. Results showed that there were two sides of team processes: "communication" and "collaboration to achieve a goal." Team processes in which communication enhanced collaboration improved team performance with regard to all aspects of the quantitative objective index (e.g., current income and number of sales), supervisor rating, and self-rating measurements. On the basis of these results, we discuss the entire process by which teamwork enhances team performance in business organizations.

  2. The COFU3 Study. Improvement in cognitive function, attention, mental performance with Pycnogenol® in healthy subjects (55-70) with high oxidative stress.

    Science.gov (United States)

    Belcaro, G; Dugall, M; Ippolito, E; Hu, S; Saggino, A; Feragalli, B

    2015-12-01

    This 12-month product registry study evaluated the effects of supplementation with French pine bark extract (Pycnogenol(®)) on cognitive function, attention, and mental performance in healthy subjects with high oxidative stress. Healthy subjects (age range 55-70) were screened - within a cardiovascular screening program - for oxidative stress. Out of 150 subjects, high oxidative stress was present in 44; the use of the supplement Pycnogenol(®) was suggested (100 mg/day). These subjects decided to use Pycnogenol(®) and accepted to be evaluated by assessing cognitive functions. A group of subjects with comparable oxidative stress was followed as a reference. IQ Code (Informant Questionnaire on Cognitive Decline in the Elderly), daily tasks, cognitive function, oxidative stress and the short Blessed tests (SBT) were used (in defined scales) to evaluate cognitive functions (COFU). As for the IQ Code, at 12 months there was a significantlty total lower score in Pycnogenol(®) patients and also a lower value (PPycnogenol(®) (-28.07%; PPycnogenol(®) group (PPycnogenol(®) were optimal with >97% of the doses of the supplement correctly used. No side effects were observed, recorded or described. Pycnogenol(®) supplementation for 12 months appears to improve cognitive function and oxidative stress in normal subjects between 55 and 70 years of age.

  3. Effect of Processing Parameters on Performance of Spray-Deposited Organic Thin-Film Transistors

    Directory of Open Access Journals (Sweden)

    Jack W. Owen

    2011-01-01

    Full Text Available The performance of organic thin-film transistors (OTFTs is often strongly dependent on the fabrication procedure. In this study, we fabricate OTFTs of soluble small-molecule organic semiconductors by spray-deposition and explore the effect of processing parameters on film morphology and device mobility. In particular, we report on the effect of the nature of solvent, the pressure of the carrier gas used in deposition, and the spraying distance. We investigate the surface morphology using scanning force microscopy and show that the molecules pack along the π-stacking direction, which is the preferred charge transport direction. Our results demonstrate that we can tune the field-effect mobility of spray-deposited devices two orders of magnitude, from 10−3 cm2/Vs to 10−1 cm2/Vs, by controlling fabrication parameters.

  4. Technical Efficiency and Organ Transplant Performance: A Mixed-Method Approach

    Science.gov (United States)

    de-Pablos-Heredero, Carmen; Fernández-Renedo, Carlos; Medina-Merodio, Jose-Amelio

    2015-01-01

    Mixed methods research is interesting to understand complex processes. Organ transplants are complex processes in need of improved final performance in times of budgetary restrictions. As the main objective a mixed method approach is used in this article to quantify the technical efficiency and the excellence achieved in organ transplant systems and to prove the influence of organizational structures and internal processes in the observed technical efficiency. The results show that it is possible to implement mechanisms for the measurement of the different components by making use of quantitative and qualitative methodologies. The analysis show a positive relationship between the levels related to the Baldrige indicators and the observed technical efficiency in the donation and transplant units of the 11 analyzed hospitals. Therefore it is possible to conclude that high levels in the Baldrige indexes are a necessary condition to reach an increased level of the service offered. PMID:25950653

  5. Effects of visual demonstration, verbal instructions, and prompted verbal descriptions on the performance of human subjects in conditional discriminations

    Science.gov (United States)

    Ribes-Iñesta, Emilio; Cepeda, Ma. Luisa; Hickman, Hortencia; Moreno, Diana; Peñalosa, Eduardo

    1992-01-01

    A study was conducted to confirm prior results concerning the role of prompted verbal descriptions of visually demonstrated stimulus relations in the acquisition and transfer of identity, difference, and similarity-matching relations (Ribes et al., 1988). Four groups of human adults were trained with these three matching relations under four different procedures: (1) visual demonstration without response requirement, (2) verbal instructions, (3) visual demonstration plus prompted verbal description, and (4) visual demonstration plus verbal instructions. These procedures were presented at the beginning of the training period before subjects could respond to the experimental task. Although most subjects in the four groups acquired the conditional discrimination under the three matching relations, only those in the two instruction-related groups showed some intramodal and extramodal transfer in tests with stimuli that had not been used in training. These results suggest the importance of measuring extra-situational and trans-situational generalization, and raise the need to distinguish between formal and functional verbal factors in the regulation of human behavior. ImagesFig. 3Fig. 4 PMID:22477044

  6. Effect of organic selenium and zinc on the performance and egg quality of Japanese quails

    Directory of Open Access Journals (Sweden)

    VC Cruz

    2011-06-01

    Full Text Available The present study aimed at evaluating the effect of the dietary inclusion of organic trace minerals selenium and zinc on the performance and internal and external egg quality of Japanese quails submitted to heat stress. Data on egg production, feed conversion (kg feed intake/kg eggs and dozen eggs, egg weight, egg specific gravity, eggshell thickness and weight, Haugh unit, yolk index, albumen index and mortality (% of 144 quails were evaluated for 112 days, divided in eight cycles of 14 days. Birds were distributed according to a randomized block experimental design into four treatments (control; 0.3ppm Se; 60ppm Zn and 0.3ppm Se + 60ppm Zn with six replicates each. There were no differences (p> 0.05 in egg production (%, egg mass (g/hen/day, feed conversion per egg mass (kg/kg, feed conversion per dozen eggs (kg/dz, average egg weight (g, egg specific gravity, eggshell thickness and weight (g, Haugh unit, yolk index, albumen index and mortality (%. However, quails fed the combination of Se and Zn presented higher (p < 0.05 feed intake (28.73 g/hen/day. Those fed only organic selenium had higher average daily egg production (30.17 eggs/day, and those fed the diet only supplemented with zinc presented higher mortality (p < 0.05. The results of the present study suggest that the supplementation of organic trace minerals in Japanese quails diets submitted to heat stress does not significantly influence quail performance and internal egg quality, whereas the supplementation of the combination of organic Zn and Se increases feed intake.

  7. Morphological Effect on Performance of Organic Photovoltaics-In Terms of Entropy and Helmholtz Energy

    Science.gov (United States)

    Kawashima, Eisuke; Fujii, Mikiya; Yamashita, Koichi

    Organic photovoltaics (OPVs) are promising alternatives to conventional silicon solar cells, but the current major challenge is their low performance. Morphology-phase separation and crystallinity of organic semiconductors-is a key factor to improve performance, and depends not only on materials but also on manufacturing processes, e.g., thermal annealing. At present, however, optimization scheme of morphologies is not established. In our previous study, we examined temperature dependence of morphologies and effects of morphology on performance by device-scale simulations. Bulk heterojunction morphologies were generated by reptation, and current density-voltage characteristics and transient absorption spectroscopy were simulated by Dynamic Monte Carlo (DMC); we elucidated the existence of the optimal annealing temperature for efficiency. In this presentation, we show Helmholtz energy F and entropy S of charge separation evaluated by graph theory and DMC simulations. We revealed that (i) S drastically decreases F, (ii) F attains a maximum at e-h distance of ca. 6 nm, and (iii) charge separation efficiency is determined by barrier height of F.

  8. Influence of Farmer demographics and Supply Chain Issues on Organized Retailer Performance

    Directory of Open Access Journals (Sweden)

    Prabhu Aruna

    2018-01-01

    Full Text Available Advances in information technology and increased social networking have increased health awareness among people in this era. The increased health awareness has prompted people to eat healthy and stay fit. In this regard, the food sector has seen tremendous demand in terms of good quality vegetables/fruits, cereals, with hygiene, nutrition, proteins etc. With the consumer willing to pay an extra premium for the quality expected, it has been observed that the producers are still offered low prices for a good quality produce whereas the intermediaries grab a huge share of the price paid by the consumer. This research tried to understand the supply chain with the farmers in focus and explored the influence of farmer demographics and the supply chain issues on the performance of the organized retail. Linear regression analysis was used to test the linear relationship of supply chain issues with organized retailer performance. The outcome of the study implies that independent variables like demographic characteristics and supply chain issues had no control over the retailer’s performance.

  9. Low-Temperature Solution-Processed Gate Dielectrics for High-Performance Organic Thin Film Transistors

    Directory of Open Access Journals (Sweden)

    Jaekyun Kim

    2015-10-01

    Full Text Available A low-temperature solution-processed high-k gate dielectric layer for use in a high-performance solution-processed semiconducting polymer organic thin-film transistor (OTFT was demonstrated. Photochemical activation of sol-gel-derived AlOx films under 150 °C permitted the formation of a dense film with low leakage and relatively high dielectric-permittivity characteristics, which are almost comparable to the results yielded by the conventionally used vacuum deposition and high temperature annealing method. Octadecylphosphonic acid (ODPA self-assembled monolayer (SAM treatment of the AlOx was employed in order to realize high-performance (>0.4 cm2/Vs saturation mobility and low-operation-voltage (<5 V diketopyrrolopyrrole (DPP-based OTFTs on an ultra-thin polyimide film (3-μm thick. Thus, low-temperature photochemically-annealed solution-processed AlOx film with SAM layer is an attractive candidate as a dielectric-layer for use in high-performance organic TFTs operated at low voltages.

  10. High-Performance Nonvolatile Organic Field-Effect Transistor Memory Based on Organic Semiconductor Heterostructures of Pentacene/P13/Pentacene as Both Charge Transport and Trapping Layers.

    Science.gov (United States)

    Li, Wen; Guo, Fengning; Ling, Haifeng; Zhang, Peng; Yi, Mingdong; Wang, Laiyuan; Wu, Dequn; Xie, Linghai; Huang, Wei

    2017-08-01

    Nonvolatile organic field-effect transistor (OFET) memory devices based on pentacene/N,N'-ditridecylperylene-3,4,9,10-tetracarboxylic diimide (P13)/pentacene trilayer organic heterostructures have been proposed. The discontinuous n-type P13 embedded in p-type pentacene layers can not only provide electrons in the semiconductor layer that facilitates electron trapping process; it also works as charge trapping sites, which is attributed to the quantum well-like pentacene/P13/pentacene organic heterostructures. The synergistic effects of charge trapping in the discontinuous P13 and the charge-trapping property of the poly(4-vinylphenol) (PVP) layer remarkably improve the memory performance. In addition, the trilayer organic heterostructures have also been successfully applied to multilevel and flexible nonvolatile memory devices. The results provide a novel design strategy to achieve high-performance nonvolatile OFET memory devices and allow potential applications for different combinations of various organic semiconductor materials in OFET memory.

  11. Identifying and weighting of key performance indicators of knowledge management2.0 in organizations

    Directory of Open Access Journals (Sweden)

    Saeed Khalilazar

    2016-03-01

    Full Text Available Main purpose of this research is identifying and weighting of key performance indicators of knowledge management2.0 in organizations. According to widespread permeation of technology, especially social media in different organizational dimensions and functional view to this phenomenon in knowledge management, performance measurement of this kind of media in order to meet organizational goals seems necessary. KM2.0 key performance indicators in this article has been identified and weighted through Delphi methodology, via questionnaire in three rounds. KM2.0 KPIs which are identified and weighted in this article are applicable in organizations that are eager to implement KM2.0 initiative and they can measure the performance of KM2.0 activities therefore this research is applicable in goal oriented approach. According to the results, KM2.0 participation process consists of 3 stages and 8 steps as mentioned below: First stage which is presence, consists of 3 steps which are registration, visit and download. Second stage which is feedback consists of 3 steps which are conversation, applause and amplification. Finally, third stage which is creation consists of 2 steps which are codification and personalization. Ultimate contribution of this research is identifying and weighting KPIs of KM2.0 in conceptual framework of KM2.0. Based on developing a conceptual framework and participation process in KM2.0 and listing related KPIs as an applicable solution in order to measure and improve the performance of organizational social media, this research has unique innovation among related and other articles.

  12. Short-Term Intra-Subject Variation in Exhaled Volatile Organic Compounds (VOCs in COPD Patients and Healthy Controls and Its Effect on Disease Classification

    Directory of Open Access Journals (Sweden)

    Christopher Phillips

    2014-05-01

    Full Text Available Exhaled volatile organic compounds (VOCs are of interest for their potential to diagnose disease non-invasively. However, most breath VOC studies have analyzed single breath samples from an individual and assumed them to be wholly consistent representative of the person. This provided the motivation for an investigation of the variability of breath profiles when three breath samples are taken over a short time period (two minute intervals between samples for 118 stable patients with Chronic Obstructive Pulmonary Disease (COPD and 63 healthy controls and analyzed by gas chromatography and mass spectroscopy (GC/MS. The extent of the variation in VOC levels differed between COPD and healthy subjects and the patterns of variation differed for isoprene versus the bulk of other VOCs. In addition, machine learning approaches were applied to the breath data to establish whether these samples differed in their ability to discriminate COPD from healthy states and whether aggregation of multiple samples, into single data sets, could offer improved discrimination. The three breath samples gave similar classification accuracy to one another when evaluated separately (66.5% to 68.3% subjects classified correctly depending on the breath repetition used. Combining multiple breath samples into single data sets gave better discrimination (73.4% subjects classified correctly. Although accuracy is not sufficient for COPD diagnosis in a clinical setting, enhanced sampling and analysis may improve accuracy further. Variability in samples, and short-term effects of practice or exertion, need to be considered in any breath testing program to improve reliability and optimize discrimination.

  13. Competition and health plan performance: evidence from health maintenance organization insurance markets.

    Science.gov (United States)

    Scanlon, Dennis P; Swaminathan, Shailender; Chernew, Michael; Bost, James E; Shevock, John

    2005-04-01

    We sought to assess whether health maintenance organizations (HMOs) operating in competitive markets, or markets with substantial HMO penetration, perform better on the standardized Health Plan Employer Data and Information Set (HEDIS) and Consumer Assessment of Health Plans Survey (CAHPS) measures. We performed a secondary analysis of nonexperimental, cross-sectional data. Data were obtained from a variety of sources, including the National Committee for Quality Assurance (NCQA), Interstudy, the Area Resource File, the U.S. Office of Personnel Management, and the U.S. Department of Labor. Multiple Indicator Multiple Cause models were used to simultaneously estimate 6 latent quality variables from 35 HEDIS and CAHPS measures and to relate these latent variables to HMO competition and HMO penetration while controlling for other health plan and market characteristics. Greater competition, as measured by the Herfindahl index, was associated with inferior health plan performance on 3 of 6 quality dimensions. Plans in markets with greater HMO penetration perform better on HEDIS- but not CAHPS-based dimensions of performance. Plans that make their data available publicly perform significantly better on both the HEDIS and CAHPS domains, performing one third to three quarters of a standard deviation better than plans that don't make their results available publicly. Plans in more competitive markets in 1999 did not achieve better quality after controlling for other important covariates, although plans in markets with a high degree of HMO penetration are performing better on the HEDIS quality dimensions. Although our study design cannot determine causality, the results suggest reason to revisit the belief that competition among HMOs will inherently improve quality.

  14. Computational Methodologies for Developing Structure–Morphology–Performance Relationships in Organic Solar Cells: A Protocol Review

    KAUST Repository

    Do, Khanh

    2016-09-08

    We outline a step-by-step protocol that incorporates a number of theoretical and computational methodologies to evaluate the structural and electronic properties of pi-conjugated semiconducting materials in the condensed phase. Our focus is on methodologies appropriate for the characterization, at the molecular level, of the morphology in blend systems consisting of an electron donor and electron acceptor, of importance for understanding the performance properties of bulk-heterojunction organic solar cells. The protocol is formulated as an introductory manual for investigators who aim to study the bulk-heterojunction morphology in molecular details, thereby facilitating the development of structure morphology property relationships when used in tandem with experimental results.

  15. High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cells.

    Science.gov (United States)

    Kesters, Jurgen; Govaerts, Sanne; Pirotte, Geert; Drijkoningen, Jeroen; Chevrier, Michèle; Van den Brande, Niko; Liu, Xianjie; Fahlman, Mats; Van Mele, Bruno; Lutsen, Laurence; Vanderzande, Dirk; Manca, Jean; Clément, Sébastien; Von Hauff, Elizabeth; Maes, Wouter

    2016-03-01

    Conjugated polyelectrolyte (CPE) interfacial layers present a powerful way to boost the I-V characteristics of organic photovoltaics. Nevertheless, clear guidelines with respect to the structure of high-performance interlayers are still lacking. In this work, impedance spectroscopy is applied to probe the dielectric permittivity of a series of polythiophene-based CPEs. The presence of ionic pendant groups grants the formation of a capacitive double layer, boosting the charge extraction and device efficiency. A counteracting effect is the diminishing affinity with the underlying photoactive layer. To balance these two effects, we found copolymer structures containing nonionic side chains to be beneficial.

  16. Performance analysis of different organic Rankine cycle configurations on board liquefied natural gas-fuelled vessels

    DEFF Research Database (Denmark)

    Baldasso, Enrico; Andreasen, Jesper Graa; Meroni, Andrea

    2017-01-01

    natural gas (LNG). The study compares the performance of six different ORC configurations both in design and off-design operation, and provides guidelines with respect to the most promising heat sources and sinks to be utilized by an ORC unit in order to maximize the annual fuel savings. In addition......Gas-fuelled shipping is expected to increase significantly in the coming years. Similarly, much effort is devoted to the study of waste heat recovery systems to be implemented on board ships. In this context, the organic Rankine cycle (ORC) technology is considered one of the most promising...

  17. Lesson from performing SCORADs in children with atopic dermatitis: subjective symptoms do not correlate well with disease extent or intensity.

    Science.gov (United States)

    Hon, K L E; Leung, T F; Wong, Y; Fok, T F

    2006-06-01

    Atopic dermatitis (AD) is a distressing disease associated with pruritus and sleep disturbance. It is not known how well these symptoms correlate with the extent and intensity of eczematous involvement. We evaluated whether: (i) the level of sleep loss correlates with pruritus and (ii) the level of pruritus correlates with the extent or severity of AD in children according to the SCORing Atopic Dermatitis (SCORAD) index. Patients with AD younger than 18 years old were recruited from the pediatric dermatology clinic of a university teaching hospital, and AD severity was evaluated by the SCORAD index. One hundred and eighty-two Chinese children with AD (107 boys and 75 girls) [mean (SD) age of 9.6 (4.2) years] were recruited. Their mean (SD) overall SCORAD was 30.1 (19.2). Sleep loss was strongly correlated with pruritus (r = 0.57, P < 0.001). However, the two subjective symptoms were only weakly correlated with the objective signs (extent and intensity) of AD. The correlations between pruritus and extent and intensity were 0.42 (P < 0.001) and 0.38 (P < 0.001), respectively, and the correlations between sleep loss and extent and intensity were 0.38 (P < 0.001) and 0.34 (P < 0.001), respectively. We speculate that the lack of a better correlation was either because pruritus and sleep loss as reported by parents were imprecise, or that mechanisms other than disease extent or severity are responsible for the pathogenesis of these subjective symptoms.

  18. Conjugated block copolymers: A building block for high-performance organic photovoltaics

    Science.gov (United States)

    Guo, Changhe

    State-of-the-art organic photovoltaics rely on kinetically trapped, partially phase-separated structures of donor/acceptor mixtures to create a high interfacial area for exciton dissociation and networks of bicontinuous phases for charge transport. Nevertheless, intrinsic structural disorder and weak intermolecular interactions in polymer blends limit the performance and stability of organic electronic devices. We demonstrate a potential strategy to control morphology and donor/acceptor heterojunctions through conjugated block copolymer poly(3-hexylthiophene)- block-poly((9,9-dioctylfluorene)-2,7-diyl-alt-[4,7-bis(thiophen-5-yl)-2,1,3-benzothiadiazole]-2',2''-diyl) (P3HT-b-PFTBT). Block copolymers can self-assemble into well-ordered nanostructures ideal for photovoltaic applications. When utilized as the photovoltaic active layer, P3HT-b-PFTBT block copolymer devices demonstrate thermal stability and photoconversion efficiency of 3% well beyond devices composed of the constituent polymer blends. Resonant soft X-ray scattering (RSOXS) is used to elucidate the structural origin for efficient block copolymer photovoltaics. Energy tuning in soft X-ray ranges gives RSOXS chemical sensitivity to characterize organic thin films with compositionally similar phases or complicated multiphase systems. RSOXS reveals that the remarkable performance of P3HT-b-PFTBT devices is due to self-assembly into nanoscale in-plane lamellar morphology, which not only establishes an equilibrium microstructure amenable for exciton dissociation but also provides pathways for efficient charge transport. Furthermore, we find evidence that covalent control of donor/acceptor interfaces in block copolymers has the potential to promote charge separation and optimize the photoconversion process by limiting charge recombination. To visualize the nanostructure in organic thin films, we introduce low energy-loss energy-filtered transmission electron microscopy (EFTEM) as an important alternative

  19. Objective and subjective evaluation of the performance of medical contact lenses fitted using a contact lens selection algorithm

    NARCIS (Netherlands)

    Visser, Esther-Simone; Wisse, Robert P L; Soeters, Nienke; Imhof, Saskia M; van der Lelij, Allegonda

    PURPOSE: To evaluate the performance of medical contact lenses (CLs) for a wide range of clinical indications. DESIGN: Prospective cross-sectional study. METHODS: A total of 281 eyes were evaluated in 281 consecutive patients (≥18 years of age; CL use ≥3 months) who visited the contact lens service

  20. The Evaluation of Preprocessing Choices in Single-Subject BOLD fMRI Using NPAIRS Performance Metrics

    DEFF Research Database (Denmark)

    Stephen, LaConte; Rottenberg, David; Strother, Stephen

    2003-01-01

    signal-to-noise and our reproducibility estimates as derived previously. Second, we submit our model complexity curves in the prediction versus reproducibility space as reflecting classic bias-variance tradeoffs. Among the particular analysis chains considered, we found little impact in performance...... metrics with alignment, some benefit with temporal detrending, and greatest improvement with spatial smoothing....

  1. The Influence of Motivation and Adaptation on Students' Subjective Well-Being, Meaning in Life and Academic Performance

    Science.gov (United States)

    Bailey, Thomas Hamilton; Phillips, Lisa J.

    2016-01-01

    High rates of mental illness among students and discontinuation with university studies are regularly reported. The current study sought to explore relationships between motivation, university adaptation and indicators of mental health and well-being and academic performance of 184 first-year university students (73% female, mean age?=?19.3…

  2. Organizers.

    Science.gov (United States)

    Callison, Daniel

    2000-01-01

    Focuses on "organizers," tools or techniques that provide identification and classification along with possible relationships or connections among ideas, concepts, and issues. Discusses David Ausubel's research and ideas concerning advance organizers; the implications of Ausubel's theory to curriculum and teaching; "webbing," a…

  3. Subjetividade e projetos coletivos: mal-estar e governabilidade nas organizações de saúde Subjectivity and collective projects: discontents and governability in health organizations

    Directory of Open Access Journals (Sweden)

    Marilene de Castilho Sá

    2001-01-01

    Full Text Available O presente texto procura explorar algumas questões derivadas das relações entre subjetividade, processos intersubjetivos/grupais e processos de planejamento e gestão nas organizações de saúde. Essa problemática tem-se destacado, fundamentalmente, a partir da constatação dos obstáculos à implementação dos processos de mudança nas organizações, bem como dos limites dos instrumentais teórico-metodológicos disponíveis em planejamento e gestão para favorecer tais processos. O setor saúde no Brasil tem sido, simultânea e paradoxalmente, espaço de experimentação de propostas inovadoras nos campos da assistência e da gestão pública, bem como locus privilegiado de manifestação das contradições sociais e do intenso processo de exclusão, segregação e desvalorização da vida que tem marcado nossa sociedade. Neste contexto, o que nos interessa essencialmente examinar é até que ponto é viável a construção de projetos coletivos, no âmbito das organizações de saúde, e como é possível abordar suas dimensões cultural, subjetiva e inconsciente - condição, nos parece, indispensável para se aprender sobre os limites (e possibilidades de governabilidade dessas organizações.This paper explores some topics regarding the relations among subjectivity, group processes and planning and management processes within health organizations. These issues turn out to be important when we consider the obstacles involved in the organizational change processes, as well as the limitations of management theoretical and methodological tools in subsidizing these processes. Health sector in Brazil has been, simultaneously and paradoxically, a space for innovations in health assistance and public management, as well as the privileged locus for the social contradictions and for the intense exclusion, segregation and undervaluation of life in our society. In this context, we are particularly interested in examine the possibilities of

  4. Modulating phonemic fluency performance in healthy subjects with transcranial magnetic stimulation over the left or right lateral frontal cortex.

    Science.gov (United States)

    Smirni, Daniela; Turriziani, Patrizia; Mangano, Giuseppa Renata; Bracco, Martina; Oliveri, Massimiliano; Cipolotti, Lisa

    2017-07-28

    A growing body of evidence have suggested that non-invasive brain stimulation techniques, such as transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS), can improve the performance of aphasic patients in language tasks. For example, application of inhibitory rTMS or tDCs over the right frontal lobe of dysphasic patients resulted in improved naming abilities. Several studies have also reported that in healthy controls (HC) tDCS application over the left prefrontal cortex (PFC) improve performance in naming and semantic fluency tasks. The aim of this study was to investigate in HC, for the first time, the effects of inhibitory repetitive TMS (rTMS) over left and right lateral frontal cortex (BA 47) on two phonemic fluency tasks (FAS or FPL). 44 right-handed HCs were administered rTMS or sham over the left or right lateral frontal cortex in two separate testing sessions, with a 24h interval, followed by the two phonemic fluency tasks. To account for possible practice effects, an additional 22 HCs were tested on only the phonemic fluency task across two sessions with no stimulation. We found that rTMS-inhibition over the left lateral frontal cortex significantly worsened phonemic fluency performance when compared to sham. In contrast, rTMS-inhibition over the right lateral frontal cortex significantly improved phonemic fluency performance when compared to sham. These results were not accounted for practice effects. We speculated that rTMS over the right lateral frontal cortex may induce plastic neural changes to the left lateral frontal cortex by suppressing interhemispheric inhibitory interactions. This resulted in an increased excitability (disinhibition) of the contralateral unstimulated left lateral frontal cortex, consequently enhancing phonemic fluency performance. Conversely, application of rTMS over the left lateral frontal cortex may induce a temporary, virtual lesion, with effects similar to those reported in left frontal

  5. Effects of cortisol on hippocampal subfields volumes and memory performance in healthy control subjects and patients with major depressive disorder.

    Science.gov (United States)

    Travis, Scott G; Coupland, Nicholas J; Hegadoren, K; Silverstone, Peter H; Huang, Yushan; Carter, Rawle; Fujiwara, Esther; Seres, Peter; Malykhin, Nikolai V

    2016-09-01

    Overactivity of the hypothalamic-pituitary-adrenal (HPA) axis in major depressive disorder (MDD) is among the most consistently replicated biological findings in psychiatry. Magnetic resonance imaging (MRI) studies have consistently demonstrated that hippocampal (HC) volume is decreased in patients with MDD. The improved spatial resolution of high field strength MRI has recently enabled measurements of HC subfield volumes in vivo. The main goal of the present study was to examine the relationship between cortisol concentrations over a day and HC subfield volumes in patients with MDD compared to healthy controls and to investigate whether diurnal cortisol measures are related to memory performance. Fourteen MDD patients with moderate or severe episodes were recruited, together with 14 healthy controls. Imaging was performed using a 4.7T whole-body imaging system. HC subfields and subregions were segmented manually using previously defined protocol. Memory performance was assessed using the Wechsler Memory Scale IV. The salivary cortisol levels were measured over the course of one day. We found that cortisol awakening response to 8h (CAR-8h) was higher in MDD patients compared to controls and that this increase in CAR-8h in MDD patients correlated negatively with left total Cornu Ammonis (CA)1-3 and left HC head volume. In healthy controls mean cortisol levels were negatively associated with right total CA1-3, right HC head, and right total HC volume. In addition, in healthy controls higher CAR-8h was related to worse performance on the immediate content memory. These results provide the first in vivo evidence of the negative associations between cortisol level, CA1-3 HC subfield volume and memory performance in patients with MDD and healthy controls. Copyright © 2016 Elsevier B.V. All rights reserved.

  6. Enhancement of device performance of organic solar cells by an interfacial perylene derivative layer

    KAUST Repository

    Kim, Inho

    2010-05-26

    We report that device performance of organic solar cells consisting of zinc phthalocyanine and fullerene (C60) can be enhanced by insertion of a perylene derivative interfacial layer between fullerene and bathocuproine (BCP) exciton blocking layer (EBL). The morphology of the BCP is influenced by the underlying N,N′-dihexyl-perylene-3,4,9,10-bis(dicarboximide) (PTCDI-C6), which promotes migration of the cathode metal into the BCP layer. Insertion of a PTCDI-C6 layer between fullerene and BCP layers enhances the power conversion efficiency to 2.5%, an improvement of 32% over devices without PTCDI-C6 layer. The enhancement in device performance by insertion of PTCDI-C6 is attributed to a reduction in series resistance due to promoted metal migration into BCP and optimized optical interference effects in multilayered devices. © 2010 American Chemical Society.

  7. Organic field effect transistors - Study of performance parameters for different dielectric layer thickness

    Science.gov (United States)

    Assis, Anu; Shahul Hameed T., A.; Predeep, P.

    2017-06-01

    Mobility and current handling capabilities of Organic Field Effect Transistor (OFET) are vitally important parameters in the electrical performance where the material parameters and thickness of different layers play significant role. In this paper, we report the simulation of an OFET using multi physics tool, where the active layer is pentacene and Poly Methyl Methacrylate (PMMA) forms the dielectric. Electrical characterizations of the OFET on varying the thickness of the dielectric layer from 600nm to 400nm are simulated and drain current, transconductance and mobility are analyzed. In the study it is found that even though capacitance increases with reduction in dielectric layer thickness, the transconductance effect is reflected many more times in the mobility which in turn could be attributed to the variations in transverse electric field. The layer thickness below 300nm may result in gate leakage current points to the requirement of optimizing the thickness of different layers for better performance.

  8. Effect of calibration environment on the performance of direct-reading organic vapor monitors.

    Science.gov (United States)

    LeBouf, Ryan F; Slaven, James E; Coffey, Christopher C

    2013-05-01

    The performance of two direct-reading organic vapor monitors (monitors) when calibrated at different environmental conditions was compared with charcoal tube results. Three MIRAN SapphIRe portable ambient air analyzers (SAP) and three Century portable toxic vapor analyzers (TVAs) were evaluated. Prior to sampling, the monitors were calibrated per the manufacturer's instructions using methane for the TVA flame ionization detector (FID) and isobutylene for the photoionization detector (PID), whereas the SapphIRe instruments were zeroed and the instrument's manufacturer-supplied library was used. For the first series of tests ("Part 1--Same condition"), the monitors were calibrated under the same environmental conditions as those present during sampling. They were then challenged with four cyclohexane concentrations (30, 150, 300, and 475 ppm) under two extreme environmental conditions: 5 degrees C and 30% relative humidity (RH) (same/cold) and 38 degrees C and 90% RH (same/hot). For the second series of tests ("Part 2--Different condition"), the monitors were calibrated at approximately normal indoor environmental conditions (21 degrees C and 50% RH) and sampled at extreme environmental conditions (different/cold and different/hot). The monitor readings from the two methods were compared with the actual cyclohexane concentration determined from charcoal tubes using ratios and root mean square errors. A number of monitor failures, both below detection limit values in the presence of a known challenge concentration and erroneously high measurements, occurred in each part: same condition 20.7% (149/720) and different condition 42.4% (305/ 720), with a majority of the failures (> 78%) during the hot and humid conditions. All monitors performed best at the same/cold, followed by the same/hot, in terms of closeness to the reference standard method and low within-monitor variability. The ranked choice of monitors for same/cold is PID > SAP > FID; for different/cold FID

  9. EFFECT OF THE FILL VENTILATION WINDOW ON PERFORMANCE OF A NATURAL DRAFT COOLING TOWER SUBJECTED TO CROSS-WINDS

    Directory of Open Access Journals (Sweden)

    K. V. Dobrego

    2016-01-01

    Full Text Available Various aerodynamic design elements and technics (wind deflectors, wind walls, etc. are utilized for improvement of the thermal efficiency of the natural draft cooling towers, particularly in conditions of cross wind. One of the technical methods, proposed by engineers of Belarus Academy of Sciences, is installation of the ventilation window in the center of the fill. This method is substantiated by the fact that the flow of cooling gas obtains maximum temperature and humidity near the center of the under-fill space of cooling tower and, as a consequence, performs minimal heat exchange. The influence of the fill ventilation window and wind deflectors in the inlet windows of the cooling tower on its thermal performance in condition of cross-wind is investigated in the paper numerically. The cooling tower of the “Woo-Jin” power plant (China 150 m of the height and 114 m of the base diameter was taken as a prototype. The analogy (equivalence between the heat and mass transfer was taken into consideration, which enabled us to consider single-phase flow and perform complicated 3D simulation by using modern personal computers. Heat transfer coefficient for the fill and its hydrodynamic resistance were defined by using actual data on total flow rate in the cooling tower. The numerical model and computational methods were tested and verified in numerous previous works. The non-linear dependence of the thermal performance of the cooling tower on wind velocity (with the minimum in vicinity of Ucr ~ 8 m/s for the simulated system was demonstrated. Calculations show that in the condition of the average wind speed the fill ventilation window doesn’t improve, but slightly decrease (by 3–7 % performance of the cooling tower. Situation changes in the condition of strong winds Ucw > 12 m/s, which are not typical for Belarus. Utilization of airflow deflectors at the inlet windows of cooling tower, conversely, increases thermal performance of the

  10. An exploratory study of the combined effects of orally administered methylphenidate and delta-9-tetrahydrocannabinol (THC) on cardiovascular function, subjective effects, and performance in healthy adults.

    Science.gov (United States)

    Kollins, Scott H; Schoenfelder, Erin N; English, Joseph S; Holdaway, Alex; Van Voorhees, Elizabeth; O'Brien, Benjamin R; Dew, Rachel; Chrisman, Allan K

    2015-01-01

    Methylphenidate (MPH) is commonly prescribed for the treatment of Attention Deficit Hyperactivity Disorder (ADHD), and is often used illicitly by young adults. Illicit users often coadminister MPH with marijuana. Little is known about physiologic and subjective effects of these substances used in combination. In this double-blind, cross-over experiment, sixteen healthy adult subjects free from psychiatric illness (including ADHD) and reporting modest levels of marijuana use participated in 6 experimental sessions wherein all combinations of placebo or 10mg oral doses of delta-9-tetrahydocannibinol (THC); and 0mg, 10mg and 40 mg of MPH were administered. Sessions were separated by at least 48 hours. Vital signs, subjective effects, and performance measure were collected. THC and MPH showed additive effects on heart rate and rate pressure product (e.g., peak heart rate for 10mg THC+0mg, 10mg, and 40 mg MPH=89.1, 95.9, 102.0 beats/min, respectively). Main effects of THC and MPH were also observed on a range of subjective measures of drug effects, and significant THC dose × MPH dose interactions were found on measures of "Feel Drug," "Good Effects," and "Take Drug Again." THC increased commission errors on a continuous performance test (CPT) and MPH reduced reaction time variability on this measure. Effects of THC, MPH, and their combination were variable on a measure of working memory (n-back task), though in general, MPH decreased reaction times and THC mitigated these effects. These results suggest that the combination of low to moderate doses of MPH and THC produces unique effects on cardiovascular function, subjective effects and performance measures. Copyright © 2014 Elsevier Inc. All rights reserved.

  11. Performance evaluation of a motor-imagery-based EEG-Brain computer interface using a combined cue with heterogeneous training data in BCI-Naive subjects

    Directory of Open Access Journals (Sweden)

    Lee Youngbum

    2011-10-01

    Full Text Available Abstract Background The subjects in EEG-Brain computer interface (BCI system experience difficulties when attempting to obtain the consistent performance of the actual movement by motor imagery alone. It is necessary to find the optimal conditions and stimuli combinations that affect the performance factors of the EEG-BCI system to guarantee equipment safety and trust through the performance evaluation of using motor imagery characteristics that can be utilized in the EEG-BCI testing environment. Methods The experiment was carried out with 10 experienced subjects and 32 naive subjects on an EEG-BCI system. There were 3 experiments: The experienced homogeneous experiment, the naive homogeneous experiment and the naive heterogeneous experiment. Each experiment was compared in terms of the six audio-visual cue combinations and consisted of 50 trials. The EEG data was classified using the least square linear classifier in case of the naive subjects through the common spatial pattern filter. The accuracy was calculated using the training and test data set. The p-value of the accuracy was obtained through the statistical significance test. Results In the case in which a naive subject was trained by a heterogeneous combined cue and tested by a visual cue, the result was not only the highest accuracy (p Conclusions We propose the use of this measuring methodology of a heterogeneous combined cue for training data and a visual cue for test data by the typical EEG-BCI algorithm on the EEG-BCI system to achieve effectiveness in terms of consistence, stability, cost, time, and resources management without the need for a trial and error process.

  12. School Achievement and Performance in Chilean High Schools: The Mediating Role of Subjective Wellbeing in School-Related Evaluations

    OpenAIRE

    López, Verónica; Oyanedel, Juan C.; Bilbao,Marian; Torres, Javier; Oyarzún, Denise; Morales, Macarena; Ascorra, Paula; Carrasco, Claudia

    2017-01-01

    School achievement gaps and school failure are problematic issues in Latin America, and are mainly explained by the socio-economic status (SES) of the students. What schools can do to improve school achievement and reduce school failure is a critical issue, both for school management and teacher training. In this study, we present the association of individual and school-related socio-emotional variables with school achievement and performance, controlling for the effects of SES. A probabilis...

  13. Evaluation of psychometric properties of Tinetti performance-oriented mobility assessment scale in subjects with knee osteoarthritis

    OpenAIRE

    Parveen, Huma; Noohu, Majumi M.

    2017-01-01

    Objective: The objective of this study was to determine the psychometric properties of the Tinetti Performance-Oriented Mobility Assessment (POMA) scale to measure balance and gait impairments in individuals with knee osteoarthritis (OA). Methods: A convenient sample of 25 individuals with bilateral OA knee were recruited. The convergent validity was determined by correlation analysis between scores of Berg Balance Scale (BBS) with balance subscale (POMA-B) and the Timed Up and Go Test (TU...

  14. Relationships among head posture, pain intensity, disability and deep cervical flexor muscle performance in subjects with postural neck pain

    Directory of Open Access Journals (Sweden)

    Arun V. Subbarayalu, PhD

    2017-12-01

    Full Text Available Objectives: Information Technology (IT professionals working with computers gradually develop forward head posture and, as a result, these professionals are susceptible to several neck disorders. This study intended to reveal the relationships between pain intensity, disability, head posture and deep cervical flexor (DCF muscle performance in patients with postural neck pain. Methods: A cross-sectional study was conducted on 84 IT professionals who were diagnosed with postural neck pain. The participants were recruited with a random sampling approach. A Visual Analogue Scale (VAS, the Northwick Park Neck Pain Questionnaire (NPQ, the Modified Head Posture Spinal Curvature Instrument (MHPSCI, and the Stabilizer Pressure Biofeedback Unit were used to measure neck pain intensity, neck disability, head posture, and DCF muscle performance, respectively. Results: The Pearson correlation coefficient revealed a significantly strong positive relationship between the VAS and the NPQ (r = 0.734. The cranio-vertebral (CV angle was found to have a significantly negative correlation with the VAS (r = −0.536 and a weak negative correlation with the NPQ (r = −0.389. Conclusion: This study concluded that a smaller CV angle corresponded to greater neck pain intensity and disability. Furthermore, there is no significant relationship between CV angle and DCF muscle performance, indicating that head posture re-education through postural correction exercises would not completely correct the motor control deficits in DCF muscles. In addition, a suitable exercise regimen that exclusively targets the deep cervical flexor muscle to improve its endurance is warranted. Keywords: Craniovertebral angle, Disability deep cervical flexors muscle performance, Head posture, Postural neck pain

  15. PERFORMANCE PREMISES FOR HUMAN RESOURCES FROM PUBLIC HEALTH ORGANIZATIONS IN ROMANIA

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    Amalia-Luisa PUPĂZĂ

    2011-03-01

    Full Text Available Improving the performance of health sector human resources is a goal pursued by all developed or developing countries. However, the lack of human resources planning and lack of clear and transparent human resources policies may lead to a crisis in this area. Human resource planning should be a priority in terms of health policies. In Romania, the lack of a planning concept and the lack of a policy on human resources has led to the actual context, with a human resources crisis of public health organizations. The role that human resources play in the health care system is indisputable. Essential to achieve quality performance in health care is human resources management. To overcome the human resources crisis that public health organizations in Romania is facing , specialists in the field have made several key recommendations: development of a coherent policy formation, development and allocation of human resources in health, increasing the number of medical staff and opportunities of professional career development in the medical field. Health system reform involves changing some aspects of employment, working conditions, degree of decentralization of management, skills, salary system and staff motivation.

  16. Adsorptive performance of chromium-containing ordered mesoporous silica on volatile organic compounds (VOCs

    Directory of Open Access Journals (Sweden)

    Jianwei Fan

    2017-09-01

    Full Text Available Volatile organic compounds (VOCs are the primary poisonous emissions into the atmosphere in natural gas exploitation and disposing process. The adsorption method has been widely applied in actual production because of its good features such as low cost, low energy consumption, flexible devices needed, etc. The commonly used adsorbents like activated carbon, silicon molecular sieves and so on are not only susceptible to plugging or spontaneous combustion but difficult to be recycled. In view of this, a new adsorbent (CrSBA15 was made by the co-assembly method to synthesize the ordered mesoporous silica materials with different amounts of chromium to eliminate VOCs. This new adsorbent was characterized by small-angle-X-ray scattering (SAXS, nitrogen adsorption/desorption, scanning electron microscopy (SEM, and transmission electron microscopy (TEM. Its adsorption performance to eliminate VOCs (toluene, benzene, cyclohexane and ethyl acetate used as typical pollutants was also tested systematically. Research results indicate that this new adsorbent of CrSBA-15(30, with the silicon/chromium ration being 30, owns the maximum micropore volume, and shows a higher adsorption performance in eliminating toluene, benzene, cyclohexane and ethyl acetate. Besides, it is cost-effective and much easier to be recycled than the activated carbon. In conclusion, CrSBA-15(30 is a good adsorbent to eliminate VOCs with broad application prospects. Keywords: Mesoporous materials, Silicon dioxide, Synthesis, Adsorption, Volatile organic compounds (VOCs, Recyclability, Energy saving

  17. Performance and behaviour of chickens with different growing rate reared according to the organic system

    Directory of Open Access Journals (Sweden)

    Marcella Bernardini

    2010-01-01

    Full Text Available The performance and the behaviour of three different chicken strains, reared according to the EEC-Regulation 1804/1999  on organic system, were compared. The strains had very slow (Robusta maculata, slow (Kabir and fast (Ross growing  rates, respectively. The trial was carried out on 200 chickens (male and female per strain. Rearing lasted 81 days as  required by the EEC Regulation. At slaughter age, 20 birds per group were killed. Robusta maculata and Kabir chickens  showed more intense walking activity and better foraging aptitude; their antioxidant capacity was also superior. Ross  chickens had a good growth rate and feed conversion index, reaching an excellent body weight, but the mortality and  the culling rate were high indicating that fast-growing strains do not adapt well to organic production. Robusta macula-  ta showed the worst productive performance although the mortality was low and Kabir birds gave intermediate results.  The carcass traits were the best in Ross and the poorest in Robusta maculata. Male chickens were heavier and leaner  than females. 

  18. Development of organic-inorganic double hole-transporting material for high performance perovskite solar cells

    Science.gov (United States)

    Jo, Jea Woong; Seo, Myung-Seok; Jung, Jae Woong; Park, Joon-Suh; Sohn, Byeong-Hyeok; Ko, Min Jae; Son, Hae Jung

    2018-02-01

    The control of the optoelectronic properties of the interlayers of perovskite solar cells (PSCs) is crucial for achieving high photovoltaic performances. Of the solution-processable interlayer candidates, NiOx is considered one of the best inorganic hole-transporting layer (HTL) materials. However, the power conversion efficiencies (PCEs) of NiOx-based PSCs are limited by the unfavorable contact between perovskite layers and NiOx HTLs, the high density of surface trap sites, and the inefficient charge extraction from perovskite photoactive layers to anodes. Here, we introduce a new organic-inorganic double HTL consisting of a Cu:NiOx thin film passivated by a conjugated polyelectrolyte (PhNa-1T) film. This double HTL has a significantly lower pinhole density and forms better contact with perovskite films, which results in enhanced charge extraction. As a result, the PCEs of PSCs fabricated with the double HTL are impressively improved up to 17.0%, which is more than 25% higher than that of the corresponding PSC with a Cu:NiOx HTL. Moreover, PSCs with the double HTLs exhibit similar stabilities under ambient conditions to devices using inorganic Cu:NiOx. Therefore, this organic-inorganic double HTL is a promising interlayer material for high performance PSCs with high air stability.

  19. Cognitive and oculomotor performance in subjects with low and high schizotypy: implications for translational drug development studies.

    Science.gov (United States)

    Koychev, I; Joyce, D; Barkus, E; Ettinger, U; Schmechtig, A; Dourish, C T; Dawson, G R; Craig, K J; Deakin, J F W

    2016-05-17

    The development of drugs to improve cognition in patients with schizophrenia is a major unmet clinical need. A number of promising compounds failed in recent clinical trials, a pattern linked to poor translation between preclinical and clinical stages of drug development. Seeking proof of efficacy in early Phase 1 studies in surrogate patient populations (for example, high schizotypy individuals where subtle cognitive impairment is present) has been suggested as a strategy to reduce attrition in the later stages of drug development. However, there is little agreement regarding the pattern of distribution of schizotypal features in the general population, creating uncertainty regarding the optimal control group that should be included in prospective trials. We aimed to address this question by comparing the performance of groups derived from the general population with low, average and high schizotypy scores over a range of cognitive and oculomotor tasks. We found that tasks dependent on frontal inhibitory mechanisms (N-Back working memory and anti-saccade oculomotor tasks), as well as a smooth-pursuit oculomotor task were sensitive to differences in the schizotypy phenotype. In these tasks the cognitive performance of 'low schizotypes' was significantly different from 'high schizotypes' with 'average schizotypes' having an intermediate performance. These results indicate that for evaluating putative cognition enhancers for treating schizophrenia in early-drug development studies the maximum schizotypy effect would be achieved using a design that compares low and high schizotypes.

  20. An Investigation of the Acute Effects of Oligofructose-Enriched Inulin on Subjective Wellbeing, Mood and Cognitive Performance

    Directory of Open Access Journals (Sweden)

    Andrew P Smith

    2015-10-01

    Full Text Available Inulin is a natural food component found in many plants that are part of the human diet (e.g., leeks, onions, wheat, garlic, chicory and artichokes. It is added to many foods and is used to increase dietary fibre, replace fats or carbohydrates, and as a prebiotic (a stimulant of beneficial bacteria in the colon. Oligofructose, which is also present in these foods, produces similar effects and most research has used a combination of these products. A previous study (Smith, 2005 investigated the effects of regular consumption of oligofructose-enriched inulin on wellbeing, mood, and cognitive performance in humans. The results showed that oligofructose-enriched inulin had no negative effects but that it did not improve wellbeing, mood, or performance. The aim of the present study was to examine the acute effects of oligofructose-enriched inulin (5 g over a 4 h period during which the participants remained in the laboratory. A double blind placebo (maltodextrin controlled study (N = 47 was carried out with the order of conditions being counterbalanced and the two sessions a week apart. On each test day mood and cognitive performance were assessed at baseline (at 8:00 and then following inulin or placebo (at 11:00. Prior to the second test session (at 10:30 participants completed a questionnaire assessing their physical symptoms and mental health during the test morning. The inulin and placebo were provided in powder form in 5 g sachets. Volunteers consumed one sachet in decaffeinated tea or decaffeinated coffee with breakfast (9:00. Questionnaire results showed that on the day that the inulin was consumed, participants felt happier, had less indigestion and were less hungry than when they consumed the placebo. As for performance and mood tasks, the most consistent effects were on the episodic memory tasks where consumption of inulin was associated with greater accuracy on a recognition memory task, and improved recall performance (immediate and