WorldWideScience

Sample records for current work describes

  1. Current Work Politics

    DEFF Research Database (Denmark)

    Hasle, Peter; Hvid, Helge

    2003-01-01

    A presentation of the development of the Danish work politics during the last decade, discussed in an international context.......A presentation of the development of the Danish work politics during the last decade, discussed in an international context....

  2. Describing current and potential markets for alternative-fuel vehicles

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-03-26

    Motor vehicles are a major source of greenhouse gases, and the rising numbers of motor vehicles and miles driven could lead to more harmful emissions that may ultimately affect the world`s climate. One approach to curtailing such emissions is to use, instead of gasoline, alternative fuels: LPG, compressed natural gas, or alcohol fuels. In addition to the greenhouse gases, pollutants can be harmful to human health: ozone, CO. The Clean Air Act Amendments of 1990 authorized EPA to set National Ambient Air Quality Standards to control this. The Energy Policy Act of 1992 (EPACT) was the first new law to emphasize strengthened energy security and decreased reliance on foreign oil since the oil shortages of the 1970`s. EPACT emphasized increasing the number of alternative-fuel vehicles (AFV`s) by mandating their incremental increase of use by Federal, state, and alternative fuel provider fleets over the new few years. Its goals are far from being met; alternative fuels` share remains trivial, about 0.3%, despite gains. This report describes current and potential markets for AFV`s; it begins by assessing the total vehicle stock, and then it focuses on current use of AFV`s in alternative fuel provider fleets and the potential for use of AFV`s in US households.

  3. Describing failure in geomaterials using second-order work approach

    Directory of Open Access Journals (Sweden)

    François Nicot

    2015-04-01

    Full Text Available Geomaterials are known to be non-associated materials. Granular soils therefore exhibit a variety of failure modes, with diffuse or localized kinematical patterns. In fact, the notion of failure itself can be confusing with regard to granular soils, because it is not associated with an obvious phenomenology. In this study, we built a proper framework, using the second-order work theory, to describe some failure modes in geomaterials based on energy conservation. The occurrence of failure is defined by an abrupt increase in kinetic energy. The increase in kinetic energy from an equilibrium state, under incremental loading, is shown to be equal to the difference between the external second-order work, involving the external loading parameters, and the internal second-order work, involving the constitutive properties of the material. When a stress limit state is reached, a certain stress component passes through a maximum value and then may decrease. Under such a condition, if a certain additional external loading is applied, the system fails, sharply increasing the strain rate. The internal stress is no longer able to balance the external stress, leading to a dynamic response of the specimen. As an illustration, the theoretical framework was applied to the well-known undrained triaxial test for loose soils. The influence of the loading control mode was clearly highlighted. It is shown that the plastic limit theory appears to be a particular case of this more general second-order work theory. When the plastic limit condition is met, the internal second-order work is nil. A class of incremental external loadings causes the kinetic energy to increase dramatically, leading to the sudden collapse of the specimen, as observed in laboratory.

  4. Current work in energy analysis

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-03-01

    This report describes the work performed at Berkeley Lab most recently. One of the Labs accomplishments is the publication of Scenarios of US Carbon Reductions, an analysis of the potential of energy technologies to reduce carbon emissions in the US. This analysis is described and played a key role in shaping the US position on climate change in the Kyoto Protocol negotiations. The Labs participation in the fundamental characterization of the climate change issue by the IPCC is described. Described also is a study of leaking electricity, which is stimulating an international campaign for a one-watt ceiling for standby electricity losses from appliances. This ceiling has the potential to save two-thirds of the 5% of US residential electricity currently expended on standby losses. The 54 vignettes contained in the report summarize results of research activities ranging in scale from calculating the efficacy of individual lamp ballasts to estimating the cost-effectiveness of the national Energy Star{reg_sign} labeling program, and ranging in location from a scoping study of energy-efficiency market transformation in California to development of an energy-efficiency project in the auto parts industry in Shandong Province, China.

  5. Application of hydrographic and surface current data to describe water properties in the Porsangerfjorden, Norway

    Science.gov (United States)

    Cieszyńska, Agata; Białogrodzka, Jagoda; Yngve Børsheim, Knut; Stramska, Małgorzata; Jankowski, Andrzej

    2016-04-01

    This presentation is a part of the NORDFLUX project, and describes some of the results from experimental work carried out in 2014 in the Porsangerfjorden located in the area of the European Arctic. The fjord borders the Barents Sea. This is a region of high climatic sensitivity and our interest in the basin stemmed from this fact. One of our long-term goals is to develop an improved understanding of the undergoing changes and interactions between this fjord and the large-scale atmospheric and oceanic conditions. In present work we focus on data sets collected with High Frequency (HF) radars monitoring surface currents in the outer part of the Porsnagerfjorden. In our analysis we also use data on water salinity and temperature collected as part of the NORDFLUX experiment, and data from sea level and meteorological station located in Honningsvaag. Analysis of data sets enabled us to describe water salinity, temperature, density distributions and their variability. What is more, we have related aforementioned results to tides, meteorological conditions, and sea surface currents speed and directions. During the poster session the Author will present the schemes of water masses movement in the area of interest. This work was funded by the Norway Grants through the Polish-Norwegian Research Programme, National Centre for Research and Development (contract No. 201985). Project title: 'Application of in situ observations, high frequency radars, and ocean color, to study suspended matter, particulate carbon, and dissolved organic carbon fluxes in coastal waters of the Barents Sea'.

  6. Psychoactive plants described in a Brazilian literary work and their chemical compounds.

    Science.gov (United States)

    Otsuka, Rafaela Denise; Lago, João Henrique Ghilardi; Rossi, Lucia; Galduróz, José Carlos Fernandes; Rodrigues, Eliana

    2010-09-01

    Ethnopharmacological research investigates the plants and other medicinal and toxic substances utilized by different traditional populations. One approach in this field is a literature search of the available publications on medicinal plants. The purpose of the current study was to select plants with psychoactive effects described in a Brazilian literary work written by Pio Correa in 1926. Those mentioned plants were classified in accordance with their indications for use as stimulants and depressors of the central nervous system. For the phytochemical study herein, we researched these species via a database search, and all the obtained information was compiled into a new database to analyze possible correlations between the chemical compounds and the psychoactive categories. Of the 813 plants searched in the literary work, 104 presented chemical data in the scientific periodicals consulted. Seventy-five of them belong to the stimulant category, while 31 are depressors and two of them belong to both categories. Phenols and flavonoids were the main compounds observed in plants of both categories, though at different frequencies. Monoterpenes (29.9%) and sesquiterpenes (28.6%) were also observed in plants from the stimulant category, while 25.8% of plants from the depressor category were comprised of carotenoids and 22.6% of steroids. The main specific compounds were identified as ferulic acid, α-pinene, limonene, α-humulene and kaempferol among the stimulant plants. Otherwise, in depressor plants were characterized caffeic acid, kaempferol, quercetin, β-carotene, physalins and withanolides as specific compounds. The association between ethnopharmacological and chemotaxonomic data, as presented in this study, could support plant selection in further investigations by research groups whose studies focus on psychoactive plants as potential therapeutics.

  7. Why simple regression models work so well describing 'risk behaviors' in the USA

    OpenAIRE

    Wallace, R.; R Fullilove

    1999-01-01

    The generalized anger created by individual experience of marginalization in the USA makes violent behavior frequent enough to become a 'typical' symbol, in the information-theoretic sense, for use in communicating along the damaged social networks of oppressed communities. Simple regression models relating violence and other risk behaviors to indices of relative deprivation emerge, after some mathematical development, as a natural consequence of this underlying dynamic, described elegantly b...

  8. Current Issues in Social Work Doctoral Education

    Science.gov (United States)

    Goodman, Harriet

    2015-01-01

    The purpose of doctoral programs in social work is to prepare research-scientists who contribute to knowledge that guides professional practice and educators competent to teach new cohorts of social work practitioners. In grooming stewards of the profession, doctoral programs also must prepare their graduates to support the larger contemporary…

  9. Working Children: Current Trends and Policy Responses.

    Science.gov (United States)

    Bequele, Assefa; Boyden, Jo

    1988-01-01

    Examines the types of employment children are most frequently engaged in, the risks involved, earnings, relationship between work and school, and the constraints on the exercise of their rights. Discusses initiatives underway to protect child workers, meet their needs, and formulate government policy. (JOW)

  10. Redirecting, progressing, and focusing actions-a framework for describing how teachers use students' comments to work with mathematics

    OpenAIRE

    Drageset, Ove Gunnar

    2014-01-01

    n order to describe and analyze teachers’ orchestrating of classroom discourse, detailed descriptions of teachers’ comments and questions are critical. The purpose of this article is to suggest new concepts that enable us to describe in detail how teachers use or do not use students’ comments to work with the mathematical content. Five teachers from upper primary school (grades five to seven, students aged 10 to 13) were studied. Beginning with the analysis of a pattern where the teacher give...

  11. Consciousness and working memory: Current trends and research perspectives.

    Science.gov (United States)

    Velichkovsky, Boris B

    2017-07-27

    Working memory has long been thought to be closely related to consciousness. However, recent empirical studies show that unconscious content may be maintained within working memory and that complex cognitive computations may be performed on-line. This promotes research on the exact relationships between consciousness and working memory. Current evidence for working memory being a conscious as well as an unconscious process is reviewed. Consciousness is shown to be considered a subset of working memory by major current theories of working memory. Evidence for unconscious elements in working memory is shown to come from visual masking and attentional blink paradigms, and from the studies of implicit working memory. It is concluded that more research is needed to explicate the relationship between consciousness and working memory. Future research directions regarding the relationship between consciousness and working memory are discussed. Copyright © 2017 Elsevier Inc. All rights reserved.

  12. New Lagrangian tools for describing transport in aperiodic time dependent flows: a case study of the Kuroshio current

    Science.gov (United States)

    Mancho, Ana M.; Mendoza, Carolina

    2009-11-01

    In recent years there has been a lot of progress in the application of dynamical systems concepts to the description of transport in oceanic flows. In these flows the classical dynamical system theory does not apply since they are aperiodic and finite-time defined. Recently, for describing these flows a new definition of distinguished trajectory has been proposed (Madrid & Mancho, Chaos, 2009). Distinguished trajectories act as organizing centres of the geometrical template of aperiodic time-dependent flows, like fixed points and periodic orbits do in time independent or periodic flows. The computation of distinguished trajectories makes use of a function M of which we show contains a lot of Lagrangian information. In this presentation I will discuss how the visualization of this function M, allows identifying relevant Lagrangian features at a glance. In particular we report an application to real altimetry data taken from satellite in the area of the Kuroshio current. The function M also determines the stable and unstable subspaces of the distinguished hyperbolic trajectories which are tangent to the invariant manifolds. From the computation of stable and unstable manifolds we report an accurate description of transport routes in this region.

  13. Distance Education Programs in Social Work: Current and Emerging Trends

    Science.gov (United States)

    Vernon, Robert; Vakalahi, Halaevalu; Pierce, Dean; Pittman-Munke, Peggy; Adkins, Lynn Frantz

    2009-01-01

    This article reports on current and emerging trends in the use of distance education technologies in social work education. Areas studied include the extent of distance education programs, curricular areas covered, technologies used, pedagogical approaches, intentions for degree-program development, sources of pressure to adopt distance education…

  14. Upper Extremity Injured Workers Stratified by Current Work Status: An Examination of Health Characteristics, Work Limitations and Work Instability

    Directory of Open Access Journals (Sweden)

    H Grant

    2010-06-01

    Full Text Available Background: Upper extremity injured workers are an under-studied population. A descriptive comparison of workers with shoulder, elbow and hand injuries reporting to a Canadian Workplace Safety and Insurance Board (WSIB clinic was undertaken.Objective: To determine if differences existed between injury groups stratified by current work status.Methods: All WSIB claimants reporting to our upper extremity clinic between 2003 and 2008 were approached to participate in this descriptive study. 314 working and 146 non-working WSIB claimants completed the Disabilities of the Arm, Shoulder and Hand questionnaire (DASH; Short Form health survey (SF36; Worker’s Limitations Questionnaire and the Work Instability Scale. Various parametric and non-parametric analyses were used to assess significant differences between groups on demographic, work and health related variables.Results: Hand, followed by the shoulder and elbow were the most common site of injury. Most non-workers listed their current injury as the reason for being off work, and attempted to return to work once since their injury occurrence. Non-workers and a subset of workers at high risk for work loss showed significantly worse mental functioning. Workers identified physical demands as the most frequent injury-related on the job limitation. 60% of current workers were listed as low risk for work loss on the Work Instability Scale.Conclusions: Poorer mental functioning, being female and sustaining a shoulder injury were risk factors for work instability. Our cohort of injured non-workers were unable to return to work due to their current injury, reinforcing the need to advocate for modified duties, shorter hours and a work environment where stress and injury recurrence is reduced. Future studies examining pre-injury depression as a risk factor for prolonged work absences are warranted.

  15. A pragmatic performance reporting approach for describing PV Hybrid systems within mini-grids. Work in progress from IEA's PVPS Task 11 Act. 31

    Energy Technology Data Exchange (ETDEWEB)

    Swingler, Andrew [Schneider Electric, Burnaby, BC (Canada). Renewable Energies Business

    2010-07-01

    Reviewers of available PV hybrid system and mini-grid case studies are often limited to information detailing the size of the main system components (PV, battery and generator) and perhaps some historical anecdotes recalling major maintenance activities. While this enables rapid insight into the capital cost and perhaps the overall reliability of the system, this information communicates little in the way of system performance from a levelized cost of electricity and GHG emissions point of view - or what can be considered 'the business' perspective. Key system performance information must be available to effectively communicate operational system performance so system operators or perspective customers. Activity 31 of the IEA's PVPS Task 11 looks at how performance reporting can be useful, why it is often absent and what can be done to improve the current situation. This paper reviews some past work in the area of data acquisition and performance calculation used for describing PV Hybrid and mini-grid systems. In particular the IEC 61724 PV performance monitoring standard and results from the 'Benchmarking RE Components and Systems' project are considered. Ultimately, a stripped-down, easier-to-implement and flexible method for monitoring and reporting on key performance indicators is proposed based, in part, on the prior literature. The proposed framework is then used to briefly discuss the performance of two monitored PV hybrid mini-grid examples. (orig.)

  16. "The current status of work on the origin of life"

    CERN Document Server

    CERN. Geneva

    2011-01-01

    Work on the Origin of Life is poised to converge onto a fourth phase and, many of us hope, success. The first phase concerned prebiotic synthesis of the small molecules, amino acids, nucleotides, lipids and others, essential for life and spanned some forty years. The second overlapping phase was inspired by the symmetric of the DNA or RNA double helix, presumed that life must necessarily be based on some form of template replication of one strand by ligation of free nucleotides to create the second strand, melting of the two strands and cycling again. Spearheaded by L. Orgel, but with many others, this effort has, to date, failed. The third phase begins with the discovery that RNA molecules can act as enzymes, and posited the RNA world, in which RNA molecules dominated. This has led to slightly successful efforts to evolve an RNA sequence able to template replicate itself. Current success is an evolved ribozyme able to do so for 14 nucleotides. The forth phase is converging around four ideas: 1) liposomes, h...

  17. Comparing current definitions of return to work: A measurement approach

    NARCIS (Netherlands)

    Steenstra, I.A.; Lee, H.; Vroome, E.M.M. de; Busse, J.W.; Hogg-Johnson, S.J.

    2012-01-01

    Introduction Return-to-work (RTW) status is an often used outcome in work and health research. In low back pain, work is regarded as a normal activity a worker should return to in order to fully recover. Comparing outcomes across studies and even jurisdictions using different definitions of RTW can

  18. Comparing current definitions of return to work: A measurement approach

    NARCIS (Netherlands)

    Steenstra, I.A.; Lee, H.; Vroome, E.M.M. de; Busse, J.W.; Hogg-Johnson, S.J.

    2012-01-01

    Introduction Return-to-work (RTW) status is an often used outcome in work and health research. In low back pain, work is regarded as a normal activity a worker should return to in order to fully recover. Comparing outcomes across studies and even jurisdictions using different definitions of RTW can

  19. [Mental health nursing work: contradictions and current potentialities].

    Science.gov (United States)

    de Oliveira, Alice G Bottaro; Alessi, Neiry Primo

    2003-01-01

    This study aimed to identify contradictions and challenges that are present nowadays in mental health nursing work, in the context of the Psychiatric Reform, on the basis of the historical-social construction of this working process. The Psychiatric Reform presupposes a new design of work purpose and instruments, which still have little visibility in nursing practice, and the possibility for the person in mental suffering to achieve the subject-citizen condition - way of being and work purpose - which is directly related with the subject-citizen awareness of the nursing worker.

  20. Management and Employee Control in Current Industrial Work

    Directory of Open Access Journals (Sweden)

    Helle Holt

    2014-09-01

    Full Text Available This article examines how employee control is affected by the ongoing erosion of boundaries in work organization and established boundaries in the relationship between employees and management. One assumption is that the erosion of boundaries offers potential for increased employee control, meaning increased autonomy or self-determination at work (employee control how and when to do what. This assumption is supported by theories on the psychosocial working environment. Another assumption is that the erosion of boundaries threatens the frontiers from where employees can defend their interests, and consequently reduces employees’ control of their work (what and how much to do. This assumption is supported by “labor process theory.” This article studies control and the erosion of boundaries in two case factories in the food industry. Two perspectives are applied: the psychosocial working environment and “labor process theory.”

  1. Management and employee control in current industrial work

    DEFF Research Database (Denmark)

    Holt, Helle; Hvid, Helge

    2014-01-01

    This article examines how employee control is affected by the ongoing erosion of boundaries in work organization and established boundaries in the relationship between employees and management. One assumption is that the erosion of boundaries offers potential for increased employee control, meaning...

  2. Social Work Continuing Education: Current Issues and Future Direction

    Science.gov (United States)

    Kurzman, Paul A.

    2016-01-01

    Continuing education is arising as an area of rapid growth and increased attention in the social work profession. Conceptually, the impetus and focus are on the promotion of the principles of lifelong learning and professional replenishment; but pragmatically, the driving force has been the virtually universal requirement of continuing education…

  3. Shift Work and Health: Current Problems and Preventive Actions

    Directory of Open Access Journals (Sweden)

    Giovanni Costa

    2010-12-01

    Full Text Available The paper gives an overview of the problems to be tackled nowadays by occupational health with regards to shift work as well as the main guidelines at organizational and medical levels on how to protect workers’ health and well-being. Working time organization is becoming a key factor on account of new technologies, market globalization, economic competition, and extension of social services to general populations, all of which involve more and more people in continuous assistance and control of work processes over the 24 hours in a day. The large increase of epidemiological and clinical studies on this issue document the severity of this risk factor on human health and well being, at both social and psychophysical levels, starting from a disruption of biological circadian rhythms and sleep/wake cycle and ending in several psychosomatic troubles and disorders, likely also including cancer, and extending to impairment of performance efficiency as well as family and social life. Appropriate interventions on the organization of shift schedules according to ergonomic criteria and careful health surveillance and social support for shift workers are important preventive and corrective measures that allow people to keep working without significant health impairment.

  4. The Catalina Sky Survey: Current and Future Work

    Science.gov (United States)

    Christensen, Eric; Larson, S.; Boattini, A.; Gibbs, A.; Grauer, A.; Hill, R.; Johnson, J.; Kowalski, R.; McNaught, R.

    2012-10-01

    The Catalina Sky Survey (CSS) continues to be the most productive Near Earth Object (NEO) survey in operation, accounting for nearly two-thirds of all NEO discoveries since 2005. We present a review of the current status of the survey operations, and highlight recent and future upgrades to our instrumentation. Recently, CSS has refurbished a 1.0-m telescope on Mt. Lemmon, Arizona, adjacent to the 1.5-m survey telescope. This telescope will be primarily used for NEO follow-up, recovery, and physical characterization of NEOs including colors and light curves. It will be capable of remote or robotic operations, programmed by adaptive queue-planning software of our own design. We expect to complete commissioning activities and begin full-time operations by the end of this year. A large-format camera featuring a single 10k x 10k detector is in the process of being fabricated for the 1.5-m survey telescope. The new camera system will increase the field-of-view from 1.2 to 5.0 square degrees, and the nightly coverage rate from 180 to 750 square degrees, to limiting magnitude V 21.5. This telescope is already the most productive for NEO discovery, accounting for approximately 40% of new NEOs since 2008, at an average rate of over 350 NEOs per year. We anticipate a significant increase in its discovery rate after commissioning, which will begin in late 2013. The Catalina Sky Survey gratefully acknowledges the support of NASA’s Near Earth Object Observation program (grant no. NNH12ZDA001N-NEOO).

  5. Impact of nanoparticles on DNA repair processes: current knowledge and working hypotheses.

    Science.gov (United States)

    Carriere, Marie; Sauvaigo, Sylvie; Douki, Thierry; Ravanat, Jean-Luc

    2017-01-01

    The potential health effects of exposure to nanomaterials (NMs) is currently heavily studied. Among the most often reported impact is DNA damage, also termed genotoxicity. While several reviews relate the DNA damage induced by NMs and the techniques that can be used to prove such effects, the question of impact of NMs on DNA repair processes has never been specifically reviewed. The present review article proposes to fill this gap of knowledge by critically describing the DNA repair processes that could be affected by nanoparticle (NP) exposure, then by reporting the current state of the art on effects of NPs on DNA repair, at the level of protein function, gene induction and post-transcriptional modifications, and taking into account the advantages and limitations of the different experimental approaches. Since little is known about this impact, working hypothesis for the future are then proposed.

  6. [Problems of work world and its impact on health. Current financial crisis].

    Science.gov (United States)

    Tomasina, Fernando

    2012-06-01

    Health and work are complex processes. Besides, they are multiple considering the forms they take. These two processes are linked to each other and they are influenced by each other. According to this, it is possible to establish that work world is extremely complex and heterogeneous. In this world, "old" or traditional risks coexist with "modern risks", derived from the new models of work organization and the incorporation of new technologies. Unemployment, work relationships precariousness and work risks outsourcing are results of neoliberal strategies. Some negative results of health-sickness process derived from transformation in work world and current global economic crisis have been noticed in current work conditions. Finally, the need for reconstructing policies focusing on this situation derived from work world is suggested.

  7. Return on current assets, working capital and required rate of return on equity

    OpenAIRE

    2014-01-01

    The problem of return on current assets and return on working capital related to the cost of equity invested in a company is analyzed in this paper. Risk – return and liquidity – profitability trade-offs influence the company’s equilibrium and management decisions. Liquidity is measured by the cash conversion cycle and it is related to the working capital strategy, measured by current ratio. Rate of return on current assets should be related to the rate of return on working capital that is li...

  8. Current Work in Energy Analysis (Energy Analysis Program -1996 Annual Report)

    Energy Technology Data Exchange (ETDEWEB)

    Energy Analysis Program

    1998-03-01

    This report describes the work that Environmental Energy Technologies Division of Lawrence Berkeley National Laboratory has been doing most recently. One of our proudest accomplishments is the publication of Scenarios of U.S. Carbon Reductions, an analysis of the potential of energy technologies to reduce carbon emissions in the U.S. This analysis played a key role in shaping the U.S. position on climate change in the Kyoto Protocol negotiations. Our participation in the fundamental characterization of the climate change issue by the IPCC is described. We are also especially proud of our study of ''leaking electricity,'' which is stimulating an international campaign for a one-watt ceiling for standby electricity losses from appliances. This ceiling has the potential to save two-thirds of the 5% of U.S. residential electricity currently expended on standby losses. The 54 vignettes contained in the following pages summarize results of research. activities ranging in scale from calculating the efficacy of individual lamp ballasts to estimating the cost-effectiveness of the national ENERGY STAR{reg_sign} labeling program, and ranging in location from a scoping study of energy-efficiency market transformation in California to development of an energy-efficiency project in the auto parts industry in Shandong Province, China. These are the intellectual endeavors of a talented team of researchers dedicated to public service.

  9. Critical currents in A-15 structure Nb3Al converted from cold-worked bcc structure

    Science.gov (United States)

    Woollam, J. A.; Alterovitz, S. A.; Haugland, E.; Webb, G. W.

    1980-01-01

    The paper considers critical currents in A-15 structure Nb3Al converted from a cold-worked bcc structure. Nb3Al prepared in the ductile phase by quenching and mechanical working followed by conversion to the A-15 structure could carry currents above 10 to the 9th power A/sq m in fields near 20 T. These critical currents are comparable to those of Nb3Ge and V3Ga which are closest competing materials for use in high fields; further enhancement of the critical current is possible if thermal treatments are optimized.

  10. How Is Working Memory Training Likely to Influence Academic Performance? Current Evidence and Methodological Considerations.

    Science.gov (United States)

    Bergman Nutley, Sissela; Söderqvist, Stina

    2017-01-01

    Working memory (WM) is one of our core cognitive functions, allowing us to keep information in mind for shorter periods of time and then work with this information. It is the gateway that information has to pass in order to be processed consciously. A well-functioning WM is therefore crucial for a number of everyday activities including learning and academic performance (Gathercole et al., 2003; Bull et al., 2008), which is the focus of this review. Specifically, we will review the research investigating whether improving WM capacity using Cogmed WM training can lead to improvements on academic performance. Emphasis is given to reviewing the theoretical principles upon which such investigations rely, in particular the complex relation between WM and mathematical and reading abilities during development and how these are likely to be influenced by training. We suggest two possible routes in which training can influence academic performance, one through an effect on learning capacity which would thus be evident with time and education, and one through an immediate effect on performance on reading and mathematical tasks. Based on the theoretical complexity described we highlight some methodological issues that are important to take into consideration when designing and interpreting research on WM training and academic performance, but that are nonetheless often overlooked in the current research literature. Finally, we will provide some suggestions for future research for advancing the understanding of WM training and its potential role in supporting academic attainment.

  11. How Is Working Memory Training Likely to Influence Academic Performance? Current Evidence and Methodological Considerations

    Science.gov (United States)

    Bergman Nutley, Sissela; Söderqvist, Stina

    2017-01-01

    Working memory (WM) is one of our core cognitive functions, allowing us to keep information in mind for shorter periods of time and then work with this information. It is the gateway that information has to pass in order to be processed consciously. A well-functioning WM is therefore crucial for a number of everyday activities including learning and academic performance (Gathercole et al., 2003; Bull et al., 2008), which is the focus of this review. Specifically, we will review the research investigating whether improving WM capacity using Cogmed WM training can lead to improvements on academic performance. Emphasis is given to reviewing the theoretical principles upon which such investigations rely, in particular the complex relation between WM and mathematical and reading abilities during development and how these are likely to be influenced by training. We suggest two possible routes in which training can influence academic performance, one through an effect on learning capacity which would thus be evident with time and education, and one through an immediate effect on performance on reading and mathematical tasks. Based on the theoretical complexity described we highlight some methodological issues that are important to take into consideration when designing and interpreting research on WM training and academic performance, but that are nonetheless often overlooked in the current research literature. Finally, we will provide some suggestions for future research for advancing the understanding of WM training and its potential role in supporting academic attainment.

  12. The Future of School Social Work Practice: Current Trends and Opportunities

    OpenAIRE

    2005-01-01

    This article discusses the information on school social work practice in the United States and summarizes recent trends and their implications for the future of school social work. The number of school social workers and current infrastructure available for the development of school social work practice is reviewed. Five sociocultural trends are summarized that are affecting public schools as well as important school-based practice trends such as standardized testing, and high stakes accounta...

  13. RETURN ON CURRENT ASSETS, WORKING CAPITAL AND REQUIRED RATE OF RETURN ON EQUITY

    Directory of Open Access Journals (Sweden)

    Monika Bolek

    2014-08-01

    Full Text Available The problem of return on current assets and return on working capital related to the cost of equity invested in a company is analyzed in this paper. Risk – return and liquidity – profitability trade-offs influence the company’s equilibrium and management decisions. Liquidity is measured by the cash conversion cycle and it is related to the working capital strategy, measured by current ratio. Rate of return on current assets should be related to the rate of return on working capital that is linked to the cost of capital and the required rate of return. The results indicate that there is a positive relationship between the return on current assets and cash conversion cycle, a positive relationship between cost of equity and return on working capital meaning that the working capital, cash conversion cycle and current assets management are related to profitability, and cost of equity is determined by the required rate of return calculated based on the Capital Asset Pricing Model.

  14. A four-part working bibliography of neuroethics: part 1: overview and reviews – defining and describing the field and its practices

    Science.gov (United States)

    2014-01-01

    Background Neuroethics entails investigations of neurocognitive mechanisms of morality and ethics; and studies and address of the ethical issues spawned by the use of neuroscience and its technologies to investigate cognition, emotion and actions. These two principal emphases, or what have been called “traditions” of neuroethics both mirror traditional bioethical discussions (such as debates about the safety of technological and pharmaceutical advances and ethical implications of new scientific and technological discoveries), and engage discourse about neuroscientific investigations of (proto-moral and moral) cognition, emotions and behaviors, and what such findings may mean for human beliefs and conduct - from the individual to the political levels. Given the growth, range, and rapid maturation of the field of neuroethics we provide an iterative, four-part document that affords a repository of international papers, books, and chapters that address the field in overview, and present discussion(s) of more particular aspects and topics of neuroethics. This first installment lists reviews and overviews of the discipline, and broad summaries of basic developments and issues of the field. Methods To systematically survey the neuroethics literature, searches were performed by accessing 11 databases, 8 additional literature depositories, and 4 individual journal searches using indexing language for National Library of Medicine (NLM) Medical Subject Heading databases. Searches and assurance against overlapping coverage were conducted using the RefWorks citation management program. Results Overview, review and reflections upon the history and multicultural perspectives of neuroethics were obtained and relevant listings from international journals, books, and book chapters are provided. Part I will be followed by three installments that will address a): the neuroscience of morality and ethics, including discussions of free will, and personal autonomy; b)

  15. Creating healthy work in small enterprises - from understanding to action:Summary of current knowledge

    OpenAIRE

    Stephen, legg; Ian S., laird; Olsen, Kirsten Bendix; Hasle, Peter

    2014-01-01

    Although much is known about small and medium enterprises (SMEs), our current knowledge and understanding of occupational health and safety (OHS) and the work environment in SMEs is limited. Far less is known about how SMEs put our knowledge of OSH into action. In short, how do we create healthy work and healthy lives as well as ‘healthy business' in SMEs? The present paper, which also acts as an editorial for this special issue, addresses these questions by providing a summary of current kno...

  16. Posterior α EEG Dynamics Dissociate Current from Future Goals in Working Memory-Guided Visual Search

    Science.gov (United States)

    2017-01-01

    Current models of visual search assume that search is guided by an active visual working memory representation of what we are currently looking for. This attentional template for currently relevant stimuli can be dissociated from accessory memory representations that are only needed prospectively, for a future task, and that should be prevented from guiding current attention. However, it remains unclear what electrophysiological mechanisms dissociate currently relevant (serving upcoming selection) from prospectively relevant memories (serving future selection). We measured EEG of 20 human subjects while they performed two consecutive visual search tasks. Before the search tasks, a cue instructed observers which item to look for first (current template) and which second (prospective template). During the delay leading up to the first search display, we found clear suppression of α band (8–14 Hz) activity in regions contralateral to remembered items, comprising both local power and interregional phase synchronization within a posterior parietal network. Importantly, these lateralization effects were stronger when the memory item was currently relevant (i.e., for the first search) compared with when it was prospectively relevant (i.e., for the second search), consistent with current templates being prioritized over future templates. In contrast, event-related potential analysis revealed that the contralateral delay activity was similar for all conditions, suggesting no difference in storage. Together, these findings support the idea that posterior α oscillations represent a state of increased processing or excitability in task-relevant cortical regions, and reflect enhanced cortical prioritization of memory representations that serve as a current selection filter. SIGNIFICANCE STATEMENT Our days are filled with looking for relevant objects while ignoring irrelevant visual information. Such visual search activity is thought to be driven by current goals activated

  17. Posterior α EEG Dynamics Dissociate Current from Future Goals in Working Memory-Guided Visual Search.

    Science.gov (United States)

    de Vries, Ingmar E J; van Driel, Joram; Olivers, Christian N L

    2017-02-08

    Current models of visual search assume that search is guided by an active visual working memory representation of what we are currently looking for. This attentional template for currently relevant stimuli can be dissociated from accessory memory representations that are only needed prospectively, for a future task, and that should be prevented from guiding current attention. However, it remains unclear what electrophysiological mechanisms dissociate currently relevant (serving upcoming selection) from prospectively relevant memories (serving future selection). We measured EEG of 20 human subjects while they performed two consecutive visual search tasks. Before the search tasks, a cue instructed observers which item to look for first (current template) and which second (prospective template). During the delay leading up to the first search display, we found clear suppression of α band (8-14 Hz) activity in regions contralateral to remembered items, comprising both local power and interregional phase synchronization within a posterior parietal network. Importantly, these lateralization effects were stronger when the memory item was currently relevant (i.e., for the first search) compared with when it was prospectively relevant (i.e., for the second search), consistent with current templates being prioritized over future templates. In contrast, event-related potential analysis revealed that the contralateral delay activity was similar for all conditions, suggesting no difference in storage. Together, these findings support the idea that posterior α oscillations represent a state of increased processing or excitability in task-relevant cortical regions, and reflect enhanced cortical prioritization of memory representations that serve as a current selection filter.SIGNIFICANCE STATEMENT Our days are filled with looking for relevant objects while ignoring irrelevant visual information. Such visual search activity is thought to be driven by current goals activated in

  18. Current Levels of Perceived Stress among Mental Health Social Workers Who Work with Suicidal Clients

    Science.gov (United States)

    Ting, Laura; Jacobson, Jodi M.; Sanders, Sara

    2011-01-01

    Mental health social workers are at increased risk of being confronted with fatal and nonfatal client suicidal behavior (CSB). Research has documented personal and professional reactions to CSB; however, empirical evidence describing the potential long-term effects is scarce. This study examined current reactions of perceived stress and continual…

  19. Effectiveness of Working Memory Training among Subjects Currently on Sick Leave Due to Complex Symptoms

    Science.gov (United States)

    Aasvik, Julie K.; Woodhouse, Astrid; Stiles, Tore C.; Jacobsen, Henrik B.; Landmark, Tormod; Glette, Mari; Borchgrevink, Petter C.; Landrø, Nils I.

    2017-01-01

    Introduction: The current study examined if adaptive working memory training (Cogmed QM) has the potential to improve inhibitory control, working memory capacity, and perceptions of memory functioning in a group of patients currently on sick leave due to symptoms of pain, insomnia, fatigue, depression and anxiety. Participants who were referred to a vocational rehabilitation center volunteered to take part in the study. Methods: Participants were randomly assigned to either a training condition (N = 25) or a control condition (N = 29). Participants in the training condition received working memory training in addition to the clinical intervention offered as part of the rehabilitation program, while participants in the control condition received treatment as usual i.e., the rehabilitation program only. Inhibitory control was measured by The Stop Signal Task, working memory was assessed by the Spatial Working Memory Test, while perceptions of memory functioning were assessed by The Everyday Memory Questionnaire-Revised. Results: Participants in the training group showed a significant improvement on the post-tests of inhibitory control when compared with the comparison group (p = 0.025). The groups did not differ on the post-tests of working memory. Both groups reported less memory problems at post-testing, but there was no sizeable difference between the two groups. Conclusions: Results indicate that working memory training does not improve general working memory capacity per se. Nor does it seem to give any added effects in terms of targeting and improving self-perceived memory functioning. Results do, however, provide evidence to suggest that inhibitory control is accessible and susceptible to modification by adaptive working memory training. PMID:28111555

  20. [Management in nursing in the current state impoverishment of working conditions].

    Science.gov (United States)

    Bellato, Roseney; Pereira, Wilza Rocha

    2004-01-01

    This study aims to provide reflection points on the nursing management process in the current state impoverishment financial conditions facing nursing work in a public health service in the State of Mato Grosso. We used the concepts of vulnerability, user rights and ethic to seek to understand how these concepts can broaden the view of citizenship in the search for better health care conditions for the users and workers in the institution studied. The blatant impoverishment of conditions that was detected point to the need for more awareness raising all levels where we think about, carry out and submit ourselves to the health care Nursing, working conditions, nursing ethics.

  1. ECOLOGY-ECONOMICAL ASSESSMENT OF NEW RECLAMATION METHOD FOR CURRENTLY WORKING TECHNOGENIC MASSIFS

    Directory of Open Access Journals (Sweden)

    Alexey Strizhenok

    2017-01-01

    Full Text Available One of the most relevant problems of the mining industry is the need to reduce the negative impact of technogenic massifs formed by wastes of extraction and processing of mineral raw materials. This problem has a significant meaning for currently used massifs, because traditional ways of reclamation are not suitable for them. The article describes the results of a scientific study on the development of the most efficient reclamation method for currently used technogenic massifs. Described in detail the main results of the field observations, methods and equipment of laboratory experiments conducted to determine agro-chemical properties of the soil and optimal composition of binder agent. The article also provides ecological and economic assessment of the proposed method of reclamation. The study was conducted on the example of the real technogenic massif, formed by wastes of phosphorus ore processing.

  2. English-Lithuanian-English Machine Translation lexicon and engine: current state and future work

    CERN Document Server

    Barisevičius, G

    2011-01-01

    This article overviews the current state of the English-Lithuanian-English machine translation system. The first part of the article describes the problems that system poses today and what actions will be taken to solve them in the future. The second part of the article tackles the main issue of the translation process. Article briefly overviews the word sense disambiguation for MT technique using Google.

  3. Analysis of Magnetic Field Intensity and Induced Current under Live Working Based on Charge Simulation Method

    Directory of Open Access Journals (Sweden)

    Luo Yuanxiang

    2015-01-01

    Full Text Available To the problem that safety distance is insufficient for 500 kV substation live working, a magnetic field analysis method for overhead line bus is given based on the charge simulation method. In the method, charge is calculated firstly, and the space field intensity distribution calculation is completed by overlying charge. The space field intensity distribution rule is carried out based on the appropriate analysis, and space field intensity distribution rule of substation is obtained. Then according to the calculation formula of inducing current, the human body induction current under a substation busbar is simulated based on MATLAB. The simulation results have a certain guidance function for actual live working.

  4. The Future of School Social Work Practice: Current Trends and Opportunities

    Directory of Open Access Journals (Sweden)

    Cynthia Franklin

    2005-05-01

    Full Text Available This article discusses the information on school social work practice in the United States and summarizes recent trends and their implications for the future of school social work. The number of school social workers and current infrastructure available for the development of school social work practice is reviewed. Five sociocultural trends are summarized that are affecting public schools as well as important school-based practice trends such as standardized testing, and high stakes accountability measures. The emerging practice trend of evidence-based practices is discussed in light of its standards and implications for school-based practice. Finally, essential knowledge for strengthening practice competencies to meet the future challenges of school-based practice is highlight.

  5. How Mathematics Describes Life

    Science.gov (United States)

    Teklu, Abraham

    2017-01-01

    The circle of life is something we have all heard of from somewhere, but we don't usually try to calculate it. For some time we have been working on analyzing a predator-prey model to better understand how mathematics can describe life, in particular the interaction between two different species. The model we are analyzing is called the Holling-Tanner model, and it cannot be solved analytically. The Holling-Tanner model is a very common model in population dynamics because it is a simple descriptor of how predators and prey interact. The model is a system of two differential equations. The model is not specific to any particular set of species and so it can describe predator-prey species ranging from lions and zebras to white blood cells and infections. One thing all these systems have in common are critical points. A critical point is a value for both populations that keeps both populations constant. It is important because at this point the differential equations are equal to zero. For this model there are two critical points, a predator free critical point and a coexistence critical point. Most of the analysis we did is on the coexistence critical point because the predator free critical point is always unstable and frankly less interesting than the coexistence critical point. What we did is consider two regimes for the differential equations, large B and small B. B, A, and C are parameters in the differential equations that control the system where B measures how responsive the predators are to change in the population, A represents predation of the prey, and C represents the satiation point of the prey population. For the large B case we were able to approximate the system of differential equations by a single scalar equation. For the small B case we were able to predict the limit cycle. The limit cycle is a process of the predator and prey populations growing and shrinking periodically. This model has a limit cycle in the regime of small B, that we solved for

  6. The Occupational Transition Process to Upper Secondary School, Further Education and/or Work in Sweden: As Described by Young Adults with Asperger Syndrome and Attention Deficit Hyperactivity Disorder

    Science.gov (United States)

    Baric, Vedrana Bolic; Hemmingsson, Helena; Hellberg, Kristina; Kjellberg, Anette

    2017-01-01

    The aim was to describe the occupational transition process to upper secondary school, further education and/or work, and to discover what support influences the process from the perspectives of young adults with Asperger syndrome or attention deficit/hyperactivity disorder. This qualitative study was performed in Sweden and comprised interviews…

  7. Transcranial direct current stimulation enhances verbal working memory training performance over time and near transfer outcomes.

    Science.gov (United States)

    Richmond, Lauren L; Wolk, David; Chein, Jason; Olson, Ingrid R

    2014-11-01

    Studies attempting to increase working memory (WM) capacity show promise in enhancing related cognitive functions but have also raised criticism in the broader scientific community given the inconsistent findings produced by these studies. Transcranial direct current stimulation (tDCS) has been shown to enhance WM performance in a single session [Fregni, F., Boggio, P., Nitsche, M., Bermpohl, F., Anatal, A., Feredoes, E., et al. Anodal transcranial direct current stimulation of prefrontal cortex enhances working memory. Experimental Brain Research, 166, 23-30, 2005]; however, the extent to which tDCS might enhance learning on a WM training regime and the extent to which learning gains might transfer outside the training task remains largely unknown. To this end, participants engaged in an adaptive WM training task [previously utilized in Richmond, L., Morrison, A., Chein, J., & Olson, I. Working memory training and transfer in older adults. Psychology & Aging, 26, 813-822, 2011; Chein, J., & Morrison, A. Expanding the mind's workspace: Training and transfer effects with a complex working memory span task. Psychonomic Bulletin & Review, 17, 193-199, 2010] for 10 sessions over 2 weeks, concurrent with either active or sham stimulation of dorsolateral pFC. Before and after training, a battery of tests tapping domains known to relate to WM abilities was administered. Results show that tDCS enhanced learning on the verbal portion of the training task by 3.65 items. Furthermore, tDCS was shown to enhance near transfer to other untrained WM tasks in comparison with a no-contact control group. These results lend support to the idea that tDCS might bolster training and transfer gains in populations with compromised WM abilities.

  8. Industrial fuel gas demonstration plant program. Current working estimate. Phase III and III

    Energy Technology Data Exchange (ETDEWEB)

    1979-12-01

    The United States Department of Energy (DOE) executed a contract with Memphis Light, Gas and Water Division (MLGW) which requires MLGW to perform process analysis, design, procurement, construction, testing, operation, and evaluation of a plant which will demonstrate the feasibility of converting high sulfur bituminous coal to industrial fuel gas with a heating value of 300 +- 30 Btu per standard cubic foot (SCF). The demonstration plant is based on the U-Gas process, and its product gas is to be used in commercial applications in Memphis, Tenn. The contract specifies that the work is to be conducted in three phases. The Phases are: Phase I - Program Development and Conceptual Design; Phase II - Demonstration Plant Final Design, Procurement and Construction; and Phase III - Demonstration Plant Operation. Under Task III of Phase I, a Cost Estimate for the Demonstration Plant was completed as well as estimates for other Phase II and III work. The output of this Estimate is presented in this volume. This Current Working Estimate for Phases II and III is based on the Process and Mechanical Designs presented in the Task II report (second issue) and the 12 volumes of the Task III report. In addition, the capital cost estimate summarized in the appendix has been used in the Economic Analysis (Task III) Report.

  9. Describe Your Favorite Teacher.

    Science.gov (United States)

    Dill, Isaac; Dill, Vicky

    1993-01-01

    A third grader describes Ms. Gonzalez, his favorite teacher, who left to accept a more lucrative teaching assignment. Ms. Gonzalez' butterflies unit covered everything from songs about social butterflies to paintings of butterfly wings, anatomy studies, and student haiku poems and biographies. Students studied biology by growing popcorn plants…

  10. Simple Waveforms, Simply Described

    Science.gov (United States)

    Baker, John G.

    2008-01-01

    Since the first Lazarus Project calculations, it has been frequently noted that binary black hole merger waveforms are 'simple.' In this talk we examine some of the simple features of coalescence and merger waveforms from a variety of binary configurations. We suggest an interpretation of the waveforms in terms of an implicit rotating source. This allows a coherent description, of both the inspiral waveforms, derivable from post-Newtonian(PN) calculations, and the numerically determined merger-ringdown. We focus particularly on similarities in the features of various Multipolar waveform components Generated by various systems. The late-time phase evolution of most L these waveform components are accurately described with a sinple analytic fit. We also discuss apparent relationships among phase and amplitude evolution. Taken together with PN information, the features we describe can provide an approximate analytic description full coalescence wavefoRms. complementary to other analytic waveforns approaches.

  11. A selective working memory impairment after transcranial direct current stimulation to the right parietal lobe.

    Science.gov (United States)

    Berryhill, Marian E; Wencil, Elaine B; Branch Coslett, H; Olson, Ingrid R

    2010-08-02

    The role of the posterior parietal cortex in working memory (WM) is poorly understood. We previously found that patients with parietal lobe damage exhibited a selective WM impairment on recognition but not recall tasks. We hypothesized that this dissociation reflected strategic differences in the utilization of attention. One concern was that these findings, and our subsequent interpretation, would not generalize to normal populations because of the patients' older age, progressive disease processes, and/or possible brain reorganization following injury. To test whether our findings extended to a normal population we applied transcranial direct current stimulation (tDCS) to right inferior parietal cortex. tDCS is a technique by which low electric current applied to the scalp modulates the resting potentials of underlying neural populations and can be used to test structure-function relationships. Eleven normal young adults received cathodal, anodal, or sham stimulation over right inferior posterior parietal cortex and then performed separate blocks of an object WM task probed by recall or recognition. The results showed that cathodal stimulation selectively impaired WM on recognition trials. These data replicate and extend our previous findings of preserved WM recall and impaired WM recognition in patients with parietal lobe lesions. Copyright 2010 Elsevier Ireland Ltd. All rights reserved.

  12. Pharmacobezoars described and demystified.

    Science.gov (United States)

    Simpson, Serge-Emile

    2011-02-01

    A bezoar is a concretion of foreign material that forms and persists in the gastrointestinal tract. Bezoars are classified by their material origins. Phytobezoars contain plant material, trichobezoars contain hair, lactobezoars contain milk proteins, and pharmacobezoars contain pharmaceutical products. Tablets, suspensions, and even insoluble drug delivery vehicles can, on rare occasions, and sometimes under specific circumstances, form pharmacobezoars. The goal of this review is to catalog and examine all of the available reports in the English language medical literature that convincingly describe the formation and management of pharmacobezoars. Articles included in this review were identified by performing searches using the terms "bezoar," "pharmacobezoar," and "concretion" in the following databases: OVID MEDLINE, PubMed, and JSTOR. The complete MEDLINE and JSTOR holdings were included in the search without date ranges. The results were limited to English language publications. Articles that described nonmedication bezoars were not included in the review. Articles describing phytobezoars, food bezoars, fecal impactions, illicit drug packet ingestions, enteral feeding material bezoars, and hygroscopic diet aid bezoars were excluded. The bibliographic references within the articles already accumulated were then examined in order to gather additional pharmacobezoar cases. The cases are grouped by pharmaceutical agent that formed the bezoar, and groupings are arranged in alphabetical order. Discussions and conclusions specific to each pharmaceutical agent are included in that agent's subheading. Patterns and themes that emerged in the review of the assembled case reports are reviewed and presented in a more concise format. Pharmacobezoars form under a wide variety of circumstances and in a wide variety of patients. They are difficult to diagnose reliably. Rules for suspecting, diagnosing, and properly managing a pharmacobezoar are highly dependent on the

  13. The Occupational Transition Process to Upper Secondary School, Further Education and/or Work in Sweden: As Described by Young Adults with Asperger Syndrome and Attention Deficit Hyperactivity Disorder.

    Science.gov (United States)

    Baric, Vedrana Bolic; Hemmingsson, Helena; Hellberg, Kristina; Kjellberg, Anette

    2017-03-01

    The aim was to describe the occupational transition process to upper secondary school, further education and/or work, and to discover what support influences the process from the perspectives of young adults with Asperger syndrome or attention deficit/hyperactivity disorder. This qualitative study was performed in Sweden and comprised interviews with 15 young adults recruited from community based day centres. Support influencing the process included: occupational transition preparation in compulsory school, practical work experience in a safe environment, and support beyond the workplace. The overall understanding shows that the occupational transition process was a longitudinal one starting as early as in middle school, and continuing until the young adults obtained and were able to remain in employment or further education.

  14. Enhanced working memory performance via transcranial direct current stimulation: The possibility of near and far transfer.

    Science.gov (United States)

    Trumbo, Michael C; Matzen, Laura E; Coffman, Brian A; Hunter, Michael A; Jones, Aaron P; Robinson, Charles S H; Clark, Vincent P

    2016-12-01

    Although working memory (WM) training programs consistently result in improvement on the trained task, benefit is typically short-lived and extends only to tasks very similar to the trained task (i.e., near transfer). It is possible that pairing repeated performance of a WM task with brain stimulation encourages plasticity in brain networks involved in WM task performance, thereby improving the training benefit. In the current study, transcranial direct current stimulation (tDCS) was paired with performance of a WM task (n-back). In Experiment 1, participants performed a spatial location-monitoring n-back during stimulation, while Experiment 2 used a verbal identity-monitoring n-back. In each experiment, participants received either active (2.0mA) or sham (0.1mA) stimulation with the anode placed over either the right or the left dorsolateral prefrontal cortex (DLPFC) and the cathode placed extracephalically. In Experiment 1, only participants receiving active stimulation with the anode placed over the right DLPFC showed marginal improvement on the trained spatial n-back, which did not extend to a near transfer (verbal n-back) or far transfer task (a matrix-reasoning task designed to measure fluid intelligence). In Experiment 2, both left and right anode placements led to improvement, and right DLPFC stimulation resulted in numerical (though not sham-adjusted) improvement on the near transfer (spatial n-back) and far transfer (fluid intelligence) task. Results suggest that WM training paired with brain stimulation may result in cognitive enhancement that transfers to performance on other tasks, depending on the combination of training task and tDCS parameters used.

  15. Current status and Future Works in Dynamic Control Rod Worth Measurement Method in KOREA

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Eun-ki; Shin, Ho-chul [Korea Hydro Nuclear Power Co. Central Research Inst, Daejeon (Korea, Republic of)

    2015-10-15

    Actually all ex-core detector signal data processing and extracting the final conclusion about the single control bank was performed by the 3rd generation of Digital Reactivity Computer System (DRCS). From 2006 to 2016, about 250 control bank worths were measured and the difference between measured and calculated worth of individual bank were several % and total rod worth differences of each cycle were less than 3%. However there were a few odd cases showing the individual difference greater than 15% which is the criteria. And some OPR1000 nuclear power plants built recently use fission chambers instead of traditional uncompensated ion chambers. To consider those conditions, any modification of the DCRM method and DRCS were requested. In this paper, short description about DCRM method, current status of DCRM modification and future works are discussed. About 10 cases among about 250 control bank worth measurement with original DCRM method with UIC signals result in very heavy fluctuation on reactivity curve and the difference approaches 15%, the individual limit. The electrometer signals processing method were the main cause. To overcome this problem, a modified reactivity computer system using own current treatment logic was designed. It shows the reactivity fluctuation can be reduced dramatically in case of UIC signal. Recently the modified DRCS coupled INVESE code applied Westinghouse 2 Loop plant and gave very good results except a control bank whose measured rod worth was shown of 18% difference from the estimated value. The results were same for three repeat tests. All possible causes are examined from computer codes to detail data acquisition system.

  16. New Described Dermatological Disorders

    Directory of Open Access Journals (Sweden)

    Müzeyyen Gönül

    2014-01-01

    Full Text Available Many advances in dermatology have been made in recent years. In the present review article, newly described disorders from the last six years are presented in detail. We divided these reports into different sections, including syndromes, autoinflammatory diseases, tumors, and unclassified disease. Syndromes included are “circumferential skin creases Kunze type” and “unusual type of pachyonychia congenita or a new syndrome”; autoinflammatory diseases include “chronic atypical neutrophilic dermatosis with lipodystrophy and elevated temperature (CANDLE syndrome,” “pyoderma gangrenosum, acne, and hidradenitis suppurativa (PASH syndrome,” and “pyogenic arthritis, pyoderma gangrenosum, acne, and hidradenitis suppurativa (PAPASH syndrome”; tumors include “acquired reactive digital fibroma,” “onychocytic matricoma and onychocytic carcinoma,” “infundibulocystic nail bed squamous cell carcinoma,” and “acral histiocytic nodules”; unclassified disorders include “saurian papulosis,” “symmetrical acrokeratoderma,” “confetti-like macular atrophy,” and “skin spicules,” “erythema papulosa semicircularis recidivans.”

  17. School Social Work in the United States: Current Evidence and Future Directions

    Directory of Open Access Journals (Sweden)

    Stone, Susan

    2015-02-01

    Full Text Available This paper surveys the historical and school institutional factors that shape current workforce, programmatic, and practice trends related to school social work in America. A key strand developed throughout is that the field of practice appears to be at a crossroads. It is suggested that this field of practice may be enhanced by placing the central focus on schools as organisations and school-community relations as key targets of intervention.Este artículo examina los factores históricos e institucionales que perfilan al personal docente, las tendencias en las programaciones y las prácticas que se desarrollan en la actualidad en el ámbito del trabajo social en la escuela en los Estados Unidos de América. Un aspecto clave derivado de este examen es que la profesión parece estar en una encrucijada. Se sugiere como alternativa a esta situación, centrar la atención y los objetivos fundamentales de intervención en las escuelas como organizaciones, y en las relaciones que se generan entre las escuelas y la comunidad.

  18. Work.

    Science.gov (United States)

    Haines, Annette M.

    2003-01-01

    Draws upon Maria Montessori's writings to examine work as a universal human tendency throughout life. Discusses the work of adaptation of the infant, work of "psycho-muscular organism" for the preschooler, work of the imagination for the elementary child, community work of the adolescent, and work of the adult. Asserts that…

  19. ANDREEA NICOLĂESCU, The Work-Life Balance in Current EU Labour Market Policies

    Directory of Open Access Journals (Sweden)

    CRISTINA LEOVARIDIS

    2011-01-01

    Full Text Available A work-life balance is one of the factors that increases an employee's individual satisfaction, leading to higher economic performance, an aspect that is found in most EU strategic documents dealing with the labour market. Focusing on gender differences, the article carries out a comparative analysis of the situation in EU Member States, on several dimensions: working time, flexible work arrangements, providing opportunities for assuming different domestic responsibilities etc.

  20. Teaching as a Collective Work: Analysis, Current Research and Implications for Teacher Education

    Science.gov (United States)

    Grangeat, Michel; Gray, Peter

    2008-01-01

    This article investigates teaching as collective work. The goals, functions and forms of teachers' collective work and changes in the professional representations or repertoire of actions through collective activity are identified. A synthetic framework is outlined and shown to be useful in addressing the data, by revealing the importance of…

  1. Development of Social Work Education in China: Background, Current Status, and Prospects

    Science.gov (United States)

    Li, Yingsheng; Han, Wen-Jui; Huang, Chien-Chung

    2012-01-01

    China's social work education dates back to the 1920s, but the profession disappeared for 36 years after the establishment of the People's Republic of China. Not until the late 1980s was social work education in China revived. At the turn of the new century, the Central Committee of the Chinese Communist Party and the State Council supported the…

  2. A Snapshot of the Current Status of Social Work Education in Mainland China

    Science.gov (United States)

    Bai, Jieru; Daley, James

    2014-01-01

    This article compares 49 colleges and universities in mainland China on the level of social work education, department and school affiliation, and duration of the program. Findings indicate great diversity in all 3 categories. Bachelor's degrees of social work are offered in 83.3% of the programs, and 38.8% of the programs offer master's…

  3. A Snapshot of the Current Status of Social Work Education in Mainland China

    Science.gov (United States)

    Bai, Jieru; Daley, James

    2014-01-01

    This article compares 49 colleges and universities in mainland China on the level of social work education, department and school affiliation, and duration of the program. Findings indicate great diversity in all 3 categories. Bachelor's degrees of social work are offered in 83.3% of the programs, and 38.8% of the programs offer master's degrees.…

  4. 湘西的斑斓印迹--沈从文笔下的苗族服饰民俗%The Gorgeous Imprinting in Western Hunan--- in Shen Ts'ung - wen's Works Describing the Miao Nationality Costume

    Institute of Scientific and Technical Information of China (English)

    武鹏冲

    2014-01-01

    湘西题材小说作为沈从文创作生涯中的重要组成部分,在20、30年代普遍批判乡土世界的落后与衰败的浪潮中,反其道而行,为大家描述了遥远的湘西世界的自然风土民俗,苗族服饰以其极具自然美和装饰美的特征,为湘西世界披上了斑斓外衣。论文拟对沈从文湘西题材小说中的苗族服饰描写进行探究,分析其背后的民俗文化内涵。%As an important component of Shen Ts'ung -wen's writing career ,novels based on West Xiang's theme do the exact opposite and describe the natural customs of the remote Xiangxi world for us during the tide of criticizing widely the backwardness and feebleness of native countryside in the 1920s and 1930s .With the characteristics of extremely natural beauty and decorative beauty ,the Miao nationality's costume put on the gorgeous cloak for the Xiangxi world .The author of this paper intends to conduct studies on the portrait on the Miao's nationality costume in Shen Ts'ung -wen's works and analyses the cultural connotation of folk customs after these works .

  5. An Exploration of the Current Working Relationship between the Educational Psychologist and the Young Offender in England.

    OpenAIRE

    Hall, Sasha

    2013-01-01

    The purpose of this study was to explore the current working relationship between the Educational Psychologist and the Young Offender in England. It aimed to identify the work EPs have done with YOs in the previous year and to explore the Educational Psychologist’s perceptions of the characteristics they perceive as necessary for a successful relationship with a young offender.\\ud A mixed methods approach was applied whereby both quantitative and qualitative data was collected. Online questio...

  6. Current guidelines in melanoma treatment. Melanoma Working Group of Gent and Bordet.

    Science.gov (United States)

    Brochez, L; Verhaeghe, E; Sales, F; Del Marmol, V; Deraemaecker, R; Vossaert, K; Naeyaert, J M

    2000-01-01

    This article focuses on the actual management of cutaneous melanoma, dealing both with established, internationally well-accepted standard procedures and interventions which are still being investigated. It wants to offer a global picture to the dermatologist of what is currently available in the therapeutic arsenal against melanoma.

  7. WORKING FEATURES OF POWER SOURCE SYSTEMS – A MULTIPLE CURRENT PULSE GENERATOR

    Directory of Open Access Journals (Sweden)

    Shs.V. Argun

    2013-04-01

    Full Text Available An analysis of circuit designs as to connecting a magnetic pulse action tool to a power source has been carried out. Design features of a magnetic pulse installation control and monitoring system in a multiple current pulse mode have been revealed. The description of the control and monitoring system block diagrams has been presented.

  8. Electromotive Potential Distribution and Electronic Leak Currents in Working YSZ Based SOCs

    DEFF Research Database (Denmark)

    Mogensen, Mogens Bjerg; Jacobsen, Torben

    2009-01-01

    The size of electronic leak currents through the YSZ electrolyte of solid oxide cells have been calculated using basic solid state electrochemical relations and literature data. The distribution of the electromotive potential, of Galvani potential, of concentration of electrons, e, and electron h...

  9. Implications of Current Reference Structures for Authority Work in Online Environments.

    Science.gov (United States)

    Watson, Mark R.; Taylor, Arlene G.

    1987-01-01

    Describes a study which examined (1) the percentage of personal and corporate name authority records in the Library of Congress authority file that do not contain any references, and (2) the percentage of references present on existing authority records that are not needed in an automatic right hand truncation, keyword searching environment. (CLB)

  10. Social Work Literature Searching: Current Issues with Databases and Online Search Engines

    Science.gov (United States)

    McGinn, Tony; Taylor, Brian; McColgan, Mary; McQuilkan, Janice

    2016-01-01

    Objectives: To compare the performance of a range of search facilities; and to illustrate the execution of a comprehensive literature search for qualitative evidence in social work. Context: Developments in literature search methods and comparisons of search facilities help facilitate access to the best available evidence for social workers.…

  11. Current Knowledge and Training Needs of Certified Rehabilitation Counselors to Work Effectively with Veterans with Disabilities

    Science.gov (United States)

    Frain, Michael; Bishop, Malachy; Tansey, Timothy; Sanchez, Jennifer; Wijngaarde, Frank

    2013-01-01

    Veterans with disabilities have gained national attention in recent years because of the wars in Iraq and Afghanistan. This study examined certified rehabilitation counselors' (CRCs) knowledge and preparation for working with veterans with disabilities on their rehabilitation. Results indicate that CRCs report low levels of preparation in…

  12. The Working Group on Meteor Showers Nomenclature: a History, Current Status and a Call for Contributions

    Science.gov (United States)

    Jopek, T. J.; Jenniskens, P. M.

    2011-01-01

    During the IAU General Assembly in Rio de Janeiro in 2009, the members of Commission 22 established the Working Group on Meteor Shower Nomenclature, from what was formerly the Task Group on Meteor Shower Nomenclature. The Task Group had completed its mission to propose a first list of established meteor showers that could receive officially names. At the business meeting of Commission 22 the list of 64 established showers was approved and consequently officially accepted by the IAU. A two-step process is adopted for showers to receive an official name from the IAU: i) before publication, all new showers discussed in the literature are first added to the Working List of Meteor Showers, thereby receiving a unique name, IAU number and three-letter code; ii) all showers which come up to the verification criterion are selected for inclusion in the List of Established Meteor Showers, before being officially named at the next IAU General Assembly.

  13. The Configuration of Youth Transitions. Current Debates about Education and Work

    Directory of Open Access Journals (Sweden)

    Analia Elizabeth Otero

    2011-11-01

    Full Text Available Studies on the passage from educational institutions to work and adult life have gained momentum in the framework of the employment crisis. Since the 1980s, changes in the situations that affect the life trajectories of contemporary youth have been a topic of discussion. This article addresses such issues by analyzing the educational and work careers of a group of young urban Argentines. The study focuses on a particular moment of their trajectories: that of the transition from high school graduation to higher education and/or work. In this way we attempt to reach a substantive discussion on those discretionary and/or determining factors that can be identified in the configuration of these transitions as well as on the points of tension that were encountered. The research is based on a reconstruction of the experiences of a group of youth (Cohort-2003 from different public and private high schools in townships in the cities of Buenos Aires and La Plata, Argentina, and involves the description given by these young people and their perception of the various scenarios that comprise their traveled paths.

  14. New respirator fit test panels representing the current U.S. civilian work force.

    Science.gov (United States)

    Zhuang, Ziqing; Bradtmiller, Bruce; Shaffer, Ronald E

    2007-09-01

    The fit test panels currently used for respirator research, design, and certification are 25-subject panels developed by Los Alamos National Laboratory (LANL) and are based on data from the 1967 and 1968 anthropometric surveys of U.S. Air Force personnel. Military data do not represent the great diversity in face size and shape seen in civilian populations. In addition, the demographics of the U.S. population have changed over the last 30 years. Thus, it is necessary to assess and refine the LANL fit test panels. This paper presents the development of new respirator fit test panels representative of current U.S. civilian workers based on an anthropometric survey of 3,997 respirator users conducted in 2003. One panel was developed using face length and face width (bivariate approach) and weighting subjects to match the age and race distribution of the U.S. population as determined from the 2000 census. Another panel was developed using the first two principal components obtained from a set of 10 facial dimensions (age and race adjusted). These 10 dimensions are associated with respirator fit and leakage and can predict the remaining face dimensions well. Respirators designed to fit these panels are expected to accommodate more than 95% of the current U.S. civilian workers. Both panels are more representative of the U.S. population than the existing LANL panel and may be appropriate for testing both half-masks and full-face piece respirators. Respirator manufacturers, standards development organizations, and government respirator certification bodies need to select the appropriate fit test panel for their particular needs. The bivariate panel is simpler to use than the principal component analysis (PCA) panel and is most similar to the LANL panel currently used. The inclusion of the eight additional facial measurements allows the PCA panel to provide better criteria for excluding extreme face sizes from being used. Because the boundaries of the two new panels are

  15. INVESTIGATION OF HIGH-CURRENT INTERRUPTING CONTACTS WORKING SURFACES MECHANICAL INTERACTION NATURE

    Directory of Open Access Journals (Sweden)

    O.G. Volkova

    2016-03-01

    Full Text Available Introduction. The nature of the interaction of high-working surfaces of the electrical contact uniquely affects their performance. By the failure of the contacts in the main drive processes resulting from complex destructive factors affecting their performance. However, not all processes are studied in detail and give in modeling. The purpose of the paper is to show the possibility of using the method of holographic interferometry to estimate the plastic deformation in the zone of contact interaction. One of the significant factors affecting the work of the contact pair is the compressive force of the contact surfaces. Compression discontinuous contact is directly connected with the processes of elastic and plastic deformation of the contact material, which is particularly evident in the contact details of the powder or composite materials. The paper focuses on the plastic deformation of the surface layers of discontinuous contact in circuit, it is believed that it is directly related to the mechanism of conductivity of contacts. As shown, a significant effect on the deformation of the contact surfaces and renders the working environment, in particular transformer oil. Methodology. Assessing the impact of compression forces on the deformation of the contact surface was conducted experimentally using the method of holographic interferometry. Results. Experimental studies, which indicated that the compact and powder materials plastic deformation in and around the area microcontacts simplistically stated that requires experimental verification. A method for evaluating the state of stress, which affects the formation and destruction of the local contact spots. Practical value. Using the experimental method of determining the movement of the contact region allows you to optimize discontinuous contacts from composite and powder materials.

  16. Working conditions and health among employees at information technology - enabled services: A review of current evidence

    Directory of Open Access Journals (Sweden)

    Kesavachandran C

    2006-07-01

    Full Text Available Workers in information technology (IT - enabled services like business process outsourcing and call centers working with visual display units are reported to have various health and psycho social disorders. Evidence from previously published studies in peer- reviewed journals and internet sources were examined to explore health disorders and psycho-social problems among personnel employed in IT-based services, for a systematic review on the topic. In addition, authors executed a questionnaire- based pilot study. The available literature and the pilot study, both suggest health disorders and psychosocial problems among workers of Business Process Outsourcing. The details are discussed in the review.

  17. Approach to the current state of work harassment prevention in Colombia

    Directory of Open Access Journals (Sweden)

    Carlos Andrés Dávila Londoño

    2015-12-01

    Full Text Available Mobbing or harassment is now recognized as a phenomenon of high impact on individuals, organizations and society. In Latin America, and specifically in Colombia, has been identified little development of thematic; this is a weakness against the possibilities to know, identify and intervene on this reality, growing in organizations. The objective of this paper is to present the results of theoretical analysis and review of prevention of mobbing in Colombia. The paper is divided into four parts. In the first, the main theoretical elements of the discussion about mobbing are synthesized. In the second, reviewed the legislation on mobbing in Colombia, and that the state has responsibilities for the identification, assessment, prevention and intervention of psychosocial risk factors at work. In a third part, presents and analyzes some measures and procedures existing prevention and intervention. Finally conclusions of the review are presented.

  18. Mechanisms and Kinetics of Environmentally Assisted Cracking: Current Status, Issues, and Suggestions for Further Work

    Science.gov (United States)

    Lynch, S. P.

    2013-03-01

    Mechanisms and kinetics of metal-induced embrittlement, hydrogen-embrittlement, and stress-corrosion cracking are discussed, and long-standing controversies are addressed by reviewing critical observations. Recommendations are also made regarding further work (including repetition of previous work using more advanced measurement and characterisation techniques) that should be carried out in order to resolve some of the contentious issues. The evidence to date suggests that adsorption-based mechanisms, involving weakening of substrate interatomic bonds so that dislocation emission or decohesion is facilitated, accounts for embrittlement in many systems. Embrittling adsorbed species include some metal atoms, hydrogen, and complex ions produced by de-alloying. Other viable mechanisms of embrittlement include those based on (1) dissolution of anodic grain-boundary regions, and (2) decohesion at grain boundaries owing to segregated hydrogen and impurities. The hydrogen-enhanced localised-plasticity mechanism, based on solute hydrogen facilitating dislocation activity in the plastic zone ahead of cracks, makes a contribution in some cases, but is relatively unimportant compared with these other mechanisms for most fracture modes. The film-induced cleavage mechanism, proposed especially for stress-corrosion cracking in systems involving de-alloying at crack tips, is questionable on numerous grounds, and is probably not viable. Rate-controlling processes for environmentally assisted cracking are not well established, except for solid-metal induced embrittlement where surface self-diffusion of embrittling atoms to crack tips controls cracking kinetics. In some systems, adsorption kinetics are probably rate-controlling for liquid-metal embrittlement, hydrogen-environment embrittlement, and stress-corrosion cracking. In other cases, rate-controlling processes could include the rate of anodic or cathodic reactions at and behind crack tips (responsible for producing embrittling

  19. Determination of work functions near melting points of refractory metals by using a direct-current arc

    Science.gov (United States)

    Gordon, W. A.; Chapman, G. B., II

    1972-01-01

    Effective work functions of refractory metals at temperatures near their melting points were determined by using a direct-current arc. A metal wire connected as the cathode was melted by striking an arc discharge in an argon atmosphere. A melted sphere was formed with a definite emitting area which was calculated from the sphere diameter measured after terminating the arc. Effective work functions were calculated from the Richardson-Dushman equation by using this emission area. The procedure is experimentally advantageous because surface cleanliness of the specimen is not critical, high vacuum is not required, and the anode-cathode spacing is not critical.

  20. Engaging Girls in STEM: A Discussion of Foundational and Current Research on What Works

    Science.gov (United States)

    Peterson, K.; Jesse, J.; Migus, L. H.

    2012-08-01

    Diversity in science, technology, engineering, and mathematics (STEM) education and careers occupies center stage in national discussions on U.S. competitiveness in the 21st century. Women constitute roughly half the total workforce in the U.S., but they hold just 25% of mathematical and science jobs and 11% of engineering jobs. Women earn nearly 60% of all bachelors and masters degrees, except in physics, computer science, and engineering, where the percentages are 20-25%. This disparity is even more pronounced at the doctoral level, where women earn fewer than 20% of awarded Ph.D.'s in physics or engineering. However, at the high school level, there is far less gender disparity: both female and male students take comparable advanced physical science and math courses. What, then, accounts for the lack of gender diversity in STEM advanced education and career paths? In fact, there is no consensus even among experts. So, what information and strategies do the EPO community need to know and include as part of designing and implementing programs to encourage more girls and women to engage in STEM for the long term? The panelists will discuss foundational and current research on pressing questions on why these trends exist and what can be done to change them. They will highlight research and evaluation results from programs that are successfully engaging girls in STEM.

  1. The current state of workers' pneumoconiosis in relationship to dusty working environments in Okayama Prefecture, Japan.

    Directory of Open Access Journals (Sweden)

    Takigawa T

    2002-12-01

    Full Text Available This study involved the examination of 1,006 chest x-ray films of workers from the industries devoted to shipyard welding, stone grinding, and refractory crushing in southern Okayama prefecture. Of the reviewed films, analysis was focused on subjects with a profusion rate of 0/1 as well as pneumoconiotic subjects (exhibiting profusion rates of 1/0 or greater in order to discover cases in the beginning stages. One-hundred-and-seventy-four films illustrated a profusion rate of 0/1 or greater, and the proportion of this profusion rate was revealed to be highest in shipyard welders. Even some workers under 40 years of age were found to have already developed pneumoconiosis. Of these 1,006 subjects, 30 volunteers permitted us to measure their personal dust exposure concentrations. The measured concentration of the shipyard welders' dust exposure (respirable dust; 3.3 86.3 mg/m3, total dust; 7.5-117.0 mg/m3 was higher than those of the other 2 industries. Statistical differences among the industries were observed in the respirable dust concentrations. A statistically significant positive correlation was demonstrated between the working duration in dusty environments and the rate of profusion. The present findings suggest the need for taking adequate measures in Okayama in order to prevent workers from developing, or to help retard the progression of, pneumoconiosis.

  2. Impact of the Diamond Light Source on research in Earth and environmental sciences: current work and future perspectives

    OpenAIRE

    Burke, IT; Mosselmans, FW; S. Shaw; Peacock, CL; Benning, LG; Coker, VS

    2015-01-01

    Diamond Light Source Ltd celebrated its 10th anniversary as a company in December 2012 and has now accepted user experiments for over 5 years. This paper describes the current facilities available at Diamond and future developments that enhance its capacities with respect to the Earth and environmental sciences. A review of relevant research conducted at Diamond thus far is provided. This highlights how synchrotron-based studies have brought about important advances in our understanding of th...

  3. The status of Leptopelis barbouri Ahl, 1929 and eleven other nomina of the current tree-frog genus Leptopelis (Arthroleptidae) described from East Africa, with a redescription of Leptopelis grandiceps Ahl, 1929.

    Science.gov (United States)

    Gvoždík, Václav; Tillack, Frank; Menegon, Michele; Loader, Simon P

    2014-04-28

    An investigation of name-bearing types and other relevant type specimens of twelve nominal Leptopelis taxa described from or distributed in the Eastern Arc Mountains in East Africa was carried out. Our aim was to clarify their status and where necessary revise respective nomina. We suggest several nomenclatural and taxonomic actions: 1) Leptopelis barbouri Ahl, 1929 is transferred to the synonymy of Leptopelis flavomaculatus (Günther, 1864) as a junior subjective synonym; 2) Leptopelis grandiceps Ahl, 1929 is resurrected from the synonymy of Leptopelis uluguruensis Barbour & Loveridge, 1928 as a valid species conforming to the tree frogs which have been known as 'L. barbouri' and a lectotype is designated; 3) Leptopelis usambarae Ahl, 1929 is transferred from the synonymy of L. uluguruensis Barbour & Loveridge, 1928 to the synonymy of L. grandiceps Ahl, 1929 as a subjective synonym; 4) a lectotype of Leptopelis amaniensis Ahl, 1929 (synonym of L. uluguruensis), Hylambates johnstoni Boulenger, 1897 (synonym of L. flavomaculatus) and Leptopelis signifer Ahl, 1929 (synonym of L. vermiculatus) is designated to stabilize identity of the nomina; and 5) the type locality of Leptopelis martiensseni Ahl, 1929 and Leptopelis tanganus Ahl, 1929 is corrected.

  4. [Current status of operations in community general support centers and the correlation of personal traits, work environment and occupational stress].

    Science.gov (United States)

    Yamaguchi, Yoshie

    2010-01-01

    The purpose of this study was to identify the current status of operations at community general support centers which provide coordination for elderly care and the correlation of personal traits, work environment and the occupational stress of the staff. Subjects of the study were 251 staff members of community general support centers. The current status of operations at the community general support centers and the personal traits, work environment, effort-remuneration imbalance model (ERI) and general health questionnaire (GHQ) were surveyed. The initial analysis involved a comparison by a chi-square test on: The effort-remuneration ratio (E/R ratio) of personal traits and work environment, risk of over-commitment (OC), and GHQ score. To explore the correlation between the E/R ratio of the three GHQ groups (low, middle and high score groups) and the OC value, one-way analysis of variance was performed. Out of the four basic functions of the community general support centers, 22.0% of the respondents noted that "establishment of a regional, comprehensive/multi-tiered service network" was functioning, and 50.4% of respondents noted that "comprehensive and continuous care management" was functioning. The average effort score was 15.5 +/- 5.3, approximately double the average value of preceding studies. Significant differences found in GHQ scores were related to working hours (pworking hours of 50 h or more" (OR: 10.38, 95% CI: 2.52-42.70), "Unstable employment" (OR: 2.75, 95% CI: 1.22-6.21) and "Anxiety related to task content" (OR: 17.04, 95% CI: 3.57-81.24). Items observed to have significant correlation with OC value risk factors were: "Weekly working hours of 50 h or more" (OR: 8.04, 95% CI: 1.99-32.41) and "Anxiety related to task content" (OR: 4.60, 95% CI: 2.04-10.37). We conclude that the basic functions of the community general support centers are not presently very functional. The stress levels of the community general support center staff are high and

  5. Impact of Work Experience and Training in the Current and Previous Occupations on Earnings: Micro Evidence from the National Longitudinal Survey of Youth

    OpenAIRE

    Christopher Dougherty

    2000-01-01

    In the empirical literature on work experience, job tenure, training and earnings, only one previous study has made a distinction between the effects of work experience in the current occupation and work experience in previous ones, and no study has made the distinction with respect to training. Yet it is reasonable to hypothesize that the distinction is important. Using data from the US National Longitudinal Survey of Youth, it is found that the returns to work experience in the current occu...

  6. Clubfoot: An Orthopaedic Surgeon Describes Clubfoot and Current Treatment Methods

    Science.gov (United States)

    Vitale, Michael

    2007-01-01

    As an orthopaedic surgeon who has treated numerous cases of clubfoot in his career, the author knows that it takes exceptional parents to deal with the challenges of having a child born with a clubfoot. However, it should be noted that a clubfoot diagnosis does not mean a life of pain, deformity, and disability for a child. Today's treatment…

  7. Plans should abstractly describe intended behavior

    Energy Technology Data Exchange (ETDEWEB)

    Pfleger, K.; Hayes-Roth, B. [Stanford Univ., CA (United States)

    1996-12-31

    Planning is the process of formulating a potential course of action. How courses of action (plans) produced by a planning module are represented and how they are used by execution-oriented modules of a complex agent to influence or dictate behavior are critical architectural issues. In contrast to the traditional model of plans as executable programs that dictate precise behaviors, we claim that autonomous agents inhabiting dynamic, unpredictable environments can make better use of plans that only abstractly describe their intended behavior. Such plans only influence or constrain behavior, rather than dictating it. This idea has been discussed in a variety of contexts, but it is seldom incorporated into working complex agents. Experiments involving instantiations of our Adaptive Intelligent Systems architecture in a variety of domains have demonstrated the generality and usefulness of the approach, even with our currently simple plan representation and mechanisms for plan following. The behavioral benefits include (1) robust improvisation of goal-directed behavior in response to dynamic situations, (2) ready exploitation of dynamically acquired knowledge or behavioral capabilities, and (3) adaptation based on dynamic aspects of coordinating diverse behaviors to achieve multiple goals. In addition to these run-time advantages, the approach has useful implications for the design and configuration of agents. Indeed, the core ideas of the approach are natural extensions of fundamental ideas in software engineering.

  8. Impact of the Diamond Light Source on research in Earth and environmental sciences: current work and future perspectives

    Science.gov (United States)

    Burke, Ian T.; Mosselmans, J. Frederick W.; Shaw, Samuel; Peacock, Caroline L.; Benning, Liane G.; Coker, Victoria S.

    2015-01-01

    Diamond Light Source Ltd celebrated its 10th anniversary as a company in December 2012 and has now accepted user experiments for over 5 years. This paper describes the current facilities available at Diamond and future developments that enhance its capacities with respect to the Earth and environmental sciences. A review of relevant research conducted at Diamond thus far is provided. This highlights how synchrotron-based studies have brought about important advances in our understanding of the fundamental parameters controlling highly complex mineral–fluid–microbe interface reactions in the natural environment. This new knowledge not only enhances our understanding of global biogeochemical processes, but also provides the opportunity for interventions to be designed for environmental remediation and beneficial use. PMID:25624516

  9. Impact of the Diamond Light Source on research in Earth and environmental sciences: current work and future perspectives.

    Science.gov (United States)

    Burke, Ian T; Mosselmans, J Frederick W; Shaw, Samuel; Peacock, Caroline L; Benning, Liane G; Coker, Victoria S

    2015-03-06

    Diamond Light Source Ltd celebrated its 10th anniversary as a company in December 2012 and has now accepted user experiments for over 5 years. This paper describes the current facilities available at Diamond and future developments that enhance its capacities with respect to the Earth and environmental sciences. A review of relevant research conducted at Diamond thus far is provided. This highlights how synchrotron-based studies have brought about important advances in our understanding of the fundamental parameters controlling highly complex mineral-fluid-microbe interface reactions in the natural environment. This new knowledge not only enhances our understanding of global biogeochemical processes, but also provides the opportunity for interventions to be designed for environmental remediation and beneficial use.

  10. Neurogenic bladder evaluation and management after spinal cord injury: Current practice among urologists working in Saudi Arabia

    Directory of Open Access Journals (Sweden)

    Waleed Al Taweel

    2011-01-01

    Full Text Available Aim: The aim of this study is to determine the current trends in the management and surveillance of the NB population secondary to spinal cord injury (SCI or myelomeningocele by certified urologist working in Saudi Arabia and to compare it to the current guidelines. Materials and Methods: A cross-sectional study was conducted using a 12-points questionnaire distributed to urologists working in Saudi Arabia and registered at the Saudi medical association. The assessment and follow-up of upper and lower urinary tract function in neurogenic bladder patients, their optimal frequency and management of related infections were the topics of inquiry. Results: Of the 272 urologists surveyed, 105 responded, yielding a response rate of 38%. Eighty-nine percent of respondents said that ultrasound was their diagnostic tool of choice for upper tract evaluation. Sixty-one percent of respondents said that they would follow their patients with a multichannel urodynamic study. Forty percent of urologists stated that they would treat asymptomatic bacteriuria. Clean intermittent catheterization (CIC was the most common modality chosen for the management of neurogenic bladder in patients with emptying difficulties. Conclusion: This study confirms that most urologists in Saudi Arabia involved with neurogenic bladder management. However, more than one third of the urologists do not have urodynamic machine and only two of the reporting practitioners has a videourodynamic machine. The results emphasize the need for clear guidelines in this field of urology in Saudi Arabia. Highly specialized rehabilitation centers for neurogenic bladder secondary to SCI are required for optimal care and urologist teaching.

  11. Five Describing Factors of Dyslexia

    Science.gov (United States)

    Tamboer, Peter; Vorst, Harrie C. M.; Oort, Frans J.

    2016-01-01

    Two subtypes of dyslexia (phonological, visual) have been under debate in various studies. However, the number of symptoms of dyslexia described in the literature exceeds the number of subtypes, and underlying relations remain unclear. We investigated underlying cognitive features of dyslexia with exploratory and confirmatory factor analyses. A…

  12. Five describing factors of dyslexia

    NARCIS (Netherlands)

    Tamboer, P.; Vorst, H.C.M.; Oort, F.J.

    2016-01-01

    Two subtypes of dyslexia (phonological, visual) have been under debate in various studies. However, the number of symptoms of dyslexia described in the literature exceeds the number of subtypes, and underlying relations remain unclear. We investigated underlying cognitive features of dyslexia with

  13. Five Describing Factors of Dyslexia

    Science.gov (United States)

    Tamboer, Peter; Vorst, Harrie C. M.; Oort, Frans J.

    2016-01-01

    Two subtypes of dyslexia (phonological, visual) have been under debate in various studies. However, the number of symptoms of dyslexia described in the literature exceeds the number of subtypes, and underlying relations remain unclear. We investigated underlying cognitive features of dyslexia with exploratory and confirmatory factor analyses. A…

  14. HIV/AIDS Course Content in CSWE-Accredited Social Work Programs: A Survey of Current Curricular Practices

    Science.gov (United States)

    Rowan, Diana; Shears, Jeffrey

    2011-01-01

    The authors surveyed program directors at all bachelor of social work and master of social work programs accredited by the Council on Social Work Education using an online tool that assessed whether and how their respective social work programs are covering content related to HIV/AIDS. Of the 650 program directors, 153 (24%) participated in the…

  15. Completely Described Undirected Graph Structure

    Directory of Open Access Journals (Sweden)

    G. S. Ivanova

    2016-01-01

    Full Text Available The objects of research are undirected graphs. The paper considers a problem of their isomorphism. A literature analysis of its solution, has shown that there is no way to define a complete graph invariant in the form of unique structural characteristics of each its vertex, which has a computational complexity of definition better than О (n 4 .The work objective is to provide the characteristics of the graph structure, which could be used to solve the problem of their isomorphism for a time better than О (n 4 . As such characteristics, the paper proposes to use the set of codes of tree roots of all the shortest - in terms of the number of edges - paths from each vertex to the others, uniquely defining the structure of each tree. It proves the theorem that it is possible to reduce the problem of isomorphism of the undirected graphs to the isomorphism problem of their splitting into the trees of all the shortest - in terms of the number of edges - paths of each vertex to the others. An algorithm to construct the shortest paths from each vertex to all others and to compute codes of their vertices has been developed. As the latter, are used Aho-codes, which find application in recognising the isomorphism of trees. The computational complexity to obtain structural characteristics of vertices has been estimated to be about О (n 3 .The pilot studies involved the full-scale experiment using the developed complex programmes to generate raw data, i.e. analytic representation of the graph with the number of vertices equal to 1200, and a programme to provide codes of the tree roots. To have an estimate of - "the worst" in terms of time - complexity of expansion algorithm of graphs into trees of the shortest paths and define the codes of their roots has been an experimentally studied how the number of tree vertices depends on the graph density. For the worst case was obtained a dependence of the number of tree vertices on the number of graph vertices

  16. Capturing Nanotechnology's Current State of Development via Analysis of Patents. OECD Science, Technology and Industry Working Papers, 2007/4

    Science.gov (United States)

    Igami, Masatsura; Okazaki, Teruo

    2007-01-01

    This analysis aims at capturing current inventive activities in nanotechnologies based on the analysis of patent applications to the European Patent Office (EPO). Reported findings include: (1) Nanotechnology is a multifaceted technology, currently consisting of a set of technologies on the nanometre scale rather than a single technological field;…

  17. Current Research and Professional Practice: Reports of Work in Progress into the Assessment of Young Language Learners.

    Science.gov (United States)

    Rea-Dickins, Pauline

    2000-01-01

    Introduces articles that follow discussing research in progress on assessing foreign language learners at the elementary school levels. The articles describe contexts in Austria, Norway, and Italy. (Author/VWL)

  18. Modeling Approaches for Describing Microbial Population Heterogeneity

    DEFF Research Database (Denmark)

    Lencastre Fernandes, Rita

    , ethanol and biomass throughout the reactor. This work has proven that the integration of CFD and population balance models, for describing the growth of a microbial population in a spatially heterogeneous reactor, is feasible, and that valuable insight on the interplay between flow and the dynamics......Although microbial populations are typically described by averaged properties, individual cells present a certain degree of variability. Indeed, initially clonal microbial populations develop into heterogeneous populations, even when growing in a homogeneous environment. A heterogeneous microbial......) to predict distributions of certain population properties including particle size, mass or volume, and molecular weight. Similarly, PBM allow for a mathematical description of distributed cell properties within microbial populations. Cell total protein content distributions (a measure of cell mass) have been...

  19. Classification system to describe workpieces definitions

    CERN Document Server

    Macconnell, W R

    2013-01-01

    A Classification System to Describe Workpieces provides information pertinent to the fundamental aspects and principles of coding. This book discusses the various applications of the classification system of coding.Organized into three chapters, this book begins with an overview of the requirements of a system of classification pertaining adequately and equally to design, production, and work planning. This text then examines the purpose of the classification system in production to determine the most suitable means of machining a component. Other chapters consider the optimal utilization of m

  20. Assessment of psychological and social current working conditions in epidemiological studies: experiences from the MUSIC-Norrtälje study.

    Science.gov (United States)

    Waldenström, Måns; Theorell, Töres; Ahlberg, Gunnel; Josephson, Malin; Nise, Patrik; Waldenström, Kerstin; Vingård, Eva

    2002-01-01

    The aim of this study was to present, evaluate and propose a tool for the assessment of psychosocial working conditions in epidemiological studies. A referent group of the large epidemiological study, the MUSIC-Norrtälje study of musculoskeletal disorders, was used. The respondents were 950 working persons (585 female and 365 male). Self-administered questionnaire and personal interview were used. The responses were subjected to factor analysis. The resulting model had components generated from the demand-control-support model and action theory. The result supported the use of different aspects of psychological job demands. The interview data seemed to be more related to factual exposure and the questionnaire data more to individual perception. The usefulness of the model was supported by associations between the model and psychosomatic symptoms and sleep disturbances. A combination of interview and questionnaire increases the possibility of interpreting the association between working conditions and health and may provide a more effective basis for interventions.

  1. [Current issues in pulmonary pathology. Report of the working group on pulmonary pathology of the German Society of Pathology].

    Science.gov (United States)

    Schnabel, Ph A; Petersen, I; Junker, K

    2012-11-01

    The working group on pulmonary pathology of the German Society of Pathology (Deutsche Gesellschaft für Pathologie, DGP) developed very actively in the last year. Apart from the autumn meeting in Heidelberg in 2011 and the sessions at the annual DGP meeting in Berlin it was possible to realize a first publication with support and coauthorship of several members of the working group dealing with the classification of lung adenocarcinoma. In this report the key aspects of the activity related to the following issues are summarized including non-small cell lung carcinoma, neuroendocrine tumors of the lungs, interstitial pulmonary diseases, cell blocks in cytology and banking in thoracic pathology.

  2. Current and Future School Psychologists' Preparedness to Work with LGBT Students: Role of Education and Gay-Straight Alliances

    Science.gov (United States)

    Arora, Prerna G.; Kelly, Jennifer; Goldstein, Thalia R.

    2016-01-01

    This study sought to assess current and future school psychologists' attitudes toward and preparedness to address the needs of lesbian, gay, bisexual, and transgender (LGBT) students in schools. Two-hundred seventy-nine school psychologists (n = 162, 58%) and school psychology graduate students (n = 117, 42%) were included in the study.…

  3. Homeworking: Home Office or Home Sweatshop? Report on Current Conditions of Homeworkers in Toronto's Garment Industry. NALL Working Paper.

    Science.gov (United States)

    Ng, Roxana; Wong, Renita Yuk-Lin; Choi, Angela

    The current conditions of home workers in the garment industry in Toronto, Canada, were examined through in-depth telephone interviews with 30 Chinese-speaking immigrant women who were employed as home workers in 1999. The paper dicusses the formal training and informal learning experiences of immigrant woman who are garment workers. A comparison…

  4. Work Plan for a Limited CCC/USDA Investigation of the Current Carbon Tetrachloride Contamination in Groundwater at Navarre, Kansas

    Energy Technology Data Exchange (ETDEWEB)

    LaFreniere, Lorraine M. [Argonne National Lab. (ANL), Argonne, IL (United States)

    2014-05-01

    During private well testing in 1990-1991, carbon tetrachloride was identified in the groundwater at several locations in the town of Navarre, Kansas, at levels exceeding the Kansas Tier 2 level and U.S. Environmental Protection Agency (EPA) maximum contaminant level (MCL) of 5.0 μg/L. Several subsequent investigations through 2006 evaluated the concentrations and distribution of carbon tetrachloride in groundwater. This work included the identification of the contaminant sources (Argonne 2007). The history of activities to address the contamination in soil and groundwater is summarized in Table 1.1. The most recent studies, conducted by the Kansas Department of Health and Environment (KDHE), include a brownfields investigation initiated in 2013 (Phase I) and continuing in early 2014 (Phase II), as well as private well testing.

  5. Behavioral and Electrophysiological Effects of Transcranial Direct Current Stimulation of the Parietal Cortex in a Visuo-Spatial Working Memory Task

    OpenAIRE

    Heimrath, K.; Sandmann, P.; Becke, A.; Müller, N G; Zaehle, T.

    2012-01-01

    Impairments of working memory (WM) performance are frequent concomitant symptoms in several psychiatric and neurologic diseases. Despite the great advance in treating the reduced WM abilities in patients suffering from, e.g., Parkinson’s and Alzheimer’s disease by means of transcranial direct current stimulation (tDCS), the exact neurophysiological underpinning subserving these therapeutic tDCS-effects are still unknown. In the present study we investigated the impact of tDCS on performance i...

  6. Advancing current approaches to disease management evaluation: capitalizing on heterogeneity to understand what works and for whom.

    Science.gov (United States)

    Elissen, Arianne M J; Adams, John L; Spreeuwenberg, Marieke; Duimel-Peeters, Inge G P; Spreeuwenberg, Cor; Linden, Ariel; Vrijhoef, Hubertus J M

    2013-03-14

    Evaluating large-scale disease management interventions implemented in actual health care settings is a complex undertaking for which universally accepted methods do not exist. Fundamental issues, such as a lack of control patients and limited generalizability, hamper the use of the 'gold-standard' randomized controlled trial, while methodological shortcomings restrict the value of observational designs. Advancing methods for disease management evaluation in practice is pivotal to learn more about the impact of population-wide approaches. Methods must account for the presence of heterogeneity in effects, which necessitates a more granular assessment of outcomes. This paper introduces multilevel regression methods as valuable techniques to evaluate 'real-world' disease management approaches in a manner that produces meaningful findings for everyday practice. In a worked example, these methods are applied to retrospectively gathered routine health care data covering a cohort of 105,056 diabetes patients who receive disease management for type 2 diabetes mellitus in the Netherlands. Multivariable, multilevel regression models are fitted to identify trends in clinical outcomes and correct for differences in characteristics of patients (age, disease duration, health status, diabetes complications, smoking status) and the intervention (measurement frequency and range, length of follow-up). After a median one year follow-up, the Dutch disease management approach was associated with small average improvements in systolic blood pressure and low-density lipoprotein, while a slight deterioration occurred in glycated hemoglobin. Differential findings suggest that patients with poorly controlled diabetes tend to benefit most from disease management in terms of improved clinical measures. Additionally, a greater measurement frequency was associated with better outcomes, while longer length of follow-up was accompanied by less positive results. Despite concerted efforts to adjust

  7. How do doctors choose where they want to work? - motives for choice of current workplace among physicians registered in Finland 1977-2006.

    Science.gov (United States)

    Heikkilä, Teppo Juhani; Hyppölä, Harri; Aine, Tiina; Halila, Hannu; Vänskä, Jukka; Kujala, Santero; Virjo, Irma; Mattila, Kari

    2014-02-01

    Though there are a number of studies investigating the career choices of physicians, there are only few concerning doctors' choices of workplace. A random sample (N=7758) of physicians licensed in Finland during the years 1977-2006 was surveyed. Respondents were asked: "To what extent did the following motives affect your choice of your current workplace?" Respondents were grouped based on several background variables. The groups were used as independent variables in univariate analysis of covariance (ANCOVA). The factors Good workplace, Career and professional development, Non-work related issues, Personal contacts and Salary were formed and used as dependent variables. There were significant differences between groups of physicians, especially in terms of gender, working sector and specialties. The association of Good workplace, Career and professional development, and Non-work related issues with the choice of a workplace significantly decreased with age. Female physicians were more concerned with Career and professional development and Non-work related issues. Since more females are entering the medical profession and there is an ongoing change of generations, health care organizations and policy makers need to develop a new philosophy in order to attract physicians. This will need to include more human-centric management and leadership, better possibilities for continuous professional development, and more personalized working arrangements depending on physician's personal motives. Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.

  8. Impact of mechanical stress on gate tunneling currents of germanium and silicon p-type metal-oxide-semiconductor field-effect transistors and metal gate work function

    Science.gov (United States)

    Choi, Youn Sung; Numata, Toshinori; Nishida, Toshikazu; Harris, Rusty; Thompson, Scott E.

    2008-03-01

    Uniaxial four-point wafer bending stress-altered gate tunneling currents are measured for germanium (Ge)/silicon (Si) channel metal-oxide-semiconductor field-effect transistors (MOSFETs) with HfO2/SiO2 gate dielectrics and TiN/P+ poly Si electrodes. Carrier separation is used to measure electron and hole currents. The strain-altered hole tunneling current from the p-type inversion layer of Ge is measured to be ˜4 times larger than that for the Si channel MOSFET, since the larger strain-induced valence band-edge splitting in Ge results in more hole repopulation into a subband with a smaller out-of-plane effective mass and a lower tunneling barrier height. The strain-altered electron tunneling current from the metal gate is measured and shown to change due to strain altering the metal work function as quantified by flatband voltage shift measurements of Si MOS capacitors with TaN electrodes.

  9. 当前企业工会工作存在的问题和对策%Problem and Countermeasures of Current Corporate Labour Union Work

    Institute of Scientific and Technical Information of China (English)

    韦振碧

    2012-01-01

      文章结合工会的维权、参与、服务、教育四大职能,分析当前企业工会工作存在的问题,并提出了解决问题的对策。%  Combining with four functions of labour union, maintaining legal rights, participation, service and education, the paper analyzes the problems in current corporate labour union work, and puts forward the solutions.

  10. The Ambiguity of Work

    DEFF Research Database (Denmark)

    Humle, Didde Maria

    2014-01-01

    drawing on the results of an ethnographic case study of a consultancy house; more specifically, it comprises an exploration of the narrative identity work of consultants as they perform work practice stories of self, work, and the organization negotiating why the work they do is both challenging...... contributes by showing that some of the elements perceived to make the work meaningful and rewarding are the same ones also described as potentially demanding and challenging. Furthermore, the article contributes by arguing that studying work practice stories as (ante)narrative identity work provides a rich......This article contributes to the current debate among organizational and work-life researchers on the double-sided nature of knowledge work, which offers great freedom and satisfaction on the one hand and the potential to be overly demanding and stressful on the other. This contribution involves...

  11. Current studies on nursing work environment and strategies for improvement of nursing work environment%护理工作环境的研究探讨与改革策略

    Institute of Scientific and Technical Information of China (English)

    尤黎明; 刘佳丽; 郑晶; 刘可

    2016-01-01

    The important role of nursing work environment has received much attention in the management of nursing workforce and the quality of health care services. This paper analyzed current studies on nursing work environment, and suggested that the government and hospital administrators pay more attention to the development of nursing workforce, adequate clinical nurse staffing levels and promoting healthy work environment for nurses.%护理工作环境在护士队伍建设和护理服务质量管理中的重要地位在近年来受到广泛关注。本文分析了国内外护理工作环境的研究结果及国外护理工作环境的改革策略,建议我国各级卫生行政部门和医疗卫生机构重视护理人才队伍建设,切实保障临床护理人力配置,共同努力构建健康的护理工作环境。

  12. Assessing the test–retest reliability of career path appreciation as a measure of current and potential work decision-making capability

    Directory of Open Access Journals (Sweden)

    Rudolf M. Oosthuizen

    2014-06-01

    Full Text Available Orientation: Assessing and developing managerial decision-making capability in a complex and volatile marketplace is imperative for most South African businesses.Purpose: The objective of this study was to assess the test–retest reliability of the career path appreciation (CPA procedure in assessing current and potential levels of work decision-making capability. The study also explored whether different gender and race groups differed significantly in terms of these levels at two CPA assessments.Motivation for the study: Limited recent test–retest research has been done regarding the reliability of the CPA technique as a tool for measuring the work decision-making capability of professional and managerial talent in the South African context. Scholars and practitioners in the field of industrial psychology could therefore benefit from follow-up research into the reliability of CPA.Research approach, design and method: The research followed an ex post facto correlational design using longitudinal data of a non-probability purposive sample (N = 527 within the Bioss SA database.Main findings: The results showed that the participants’ first CPA assessment scores correlated significantly and positively with their second CPA assessment scores. Gender and race groups differed significantly in their levels of current work decision-making capability at both assessments.Practical/managerial implications: The CPA procedure can be used with confidence as an assessment tool in the selection, mentoring and development of high-potential managerial and professional talent for diverse gender and race groups.Contribution/value-add: These findings contribute valuable information regarding the reliability of CPA and the differences between race and gender groups in the South African context.

  13. Analysis and Research on the Current Situation of Ningxia Foreign Talents Introduction Work%宁夏引进国外智力现状分析研究

    Institute of Scientific and Technical Information of China (English)

    穆海彬; 高蔚丰

    2015-01-01

    自治区党委、政府高度重视人才工作,不断创新、完善人才开发政策和机制,营造出良好的育才、引才、聚才、用才环境。本文从宁夏引智工作现状出发,根据我区实际状况,探析宁夏引智工作在新的历史阶段如何把握机遇,提出对策研究,旨在为政府部门决策提供参考依据。%The Party Committee and Government of Ningxia Hui Autonomous Region attach great importance to human resources work. By adopting a series of measures on innovating and improving human resource development policies and mechanisms, the Party Committee and Government aim to create a good environment for talents cultivation, introduction, converging and utilization. This paper based on the current situation of Ningxia development and its talents-introducing work, intends to investigate and analyze the way for Ningxia talents-introducing work to seize opportunities in new historical period and to propose countermeasures for providing a reference for government decision-making.

  14. Social work, general practice and evidence-based policy in the collaborative care of older people: current problems and future possibilities.

    Science.gov (United States)

    Kharicha, Kalpa; Levin, Enid; Iliffe, Steve; Davey, Barbara

    2004-03-01

    While collaborative (or joint) working between social services and primary healthcare continues to rise up the policy agenda, current policy is not based on sound evidence of benefit to either patients or the wider community. Both sets of practitioners report benefits for their own work from adopting new arrangements for collaboration. The underlying assumption behind much of this activity is that a greater degree of integration provides benefits to both users and their carers, a perspective that at times obscures the issue of resource availability, especially in the form of practical community services such as district nursing and home help. At the present time there is insufficient evidence to demonstrate that formal arrangements for collaborative working (CW) are better than those forged informally between committed individuals or teams. Furthermore, arrangements for CW have not hitherto been widely evaluated in systematic studies with a comparative design and focus on outcomes for users and carers rather than on processes. In this paper we propose a number of process measures for future evaluation of CW: (1) study populations must be comparable; (2) details of how services are actually delivered must be obtained and colocation should not be assumed to mean collaboration; (3) care packages in areas of comparable resources should be examined; (4) both destinational outcomes and user-defined evaluations of benefit should be considered; (5) possible disadvantages of integrated care also need to be actively considered; (6) evaluations should include an economic analysis. Those implementing new policies in Primary Care Trusts have, at present, little sound evidence to guide them in their innovative work. However, they should take the opportunity to rigorously test the advantages and disadvantages of collaboration.

  15. How Do Children Describe Spatial Relationships?

    Science.gov (United States)

    Cox, M. V.; Richardson, J. Ryder

    1985-01-01

    Describes a study of children's production of locative prepositions in order to test H. Clark's hypotheses regarding the acquisition of spatial terms. Subjects were required to describe the spatial arrangement of two balls arranged in each of three spatial dimensions. (SED)

  16. Mobility Work

    DEFF Research Database (Denmark)

    Bardram, Jakob Eyvind; Bossen, Claus

    2005-01-01

    We posit the concept of Mobility Work to describe efforts of moving about people and things as part of accomplishing tasks. Mobility work can be seen as a spatial parallel to the concept of articulation work proposed by the sociologist Anselm Strauss. Articulation work describes efforts...... of coordination necessary in cooperative work, but focuses, we argue, mainly on the temporal aspects of cooperative work. As a supplement, the concept of mobility work focuses on the spatial aspects of cooperative work. Whereas actors seek to diminish the amount of articulation work needed in collaboration...... by constructing Standard Operation Procedures (SOPs), actors minimise mobility work by constructing Standard Operation Configurations (SOCs). We apply the concept of mobility work to the ethnography of hospital work, and argue that mobility arises because of the need to get access to people, places, knowledge and...

  17. Did goethe describe attention deficit hyperactivity disorder?

    Science.gov (United States)

    Bonazza, Sara; Scaglione, Cesa; Poppi, Massimo; Rizzo, Giovanni

    2011-01-01

    As early as 1846, the typical symptoms of attention deficit hyperactivity disorder (ADHD) were described by Heinrich Hoffmann (1809-1894). However, in Goethe's masterpiece Faust (1832), the character of Euphorion strongly suggests ADHD diagnosis.

  18. describing a collaborative clothing design process between ...

    African Journals Online (AJOL)

    user

    ISSN 0378-5254 Journal of Family Ecology and Consumer Sciences, Vol 43, 2015. Designing success: describing a ... PROCESS BETWEEN APPRENTICE DESIGNERS AND EXPERT DESIGN ...... decision-making. Thinking Skills and ...

  19. First on-line survey of an international multidisciplinary working group (MightyMedic) on current practice in diagnosis, therapy and follow-up of dyslipidemias.

    Science.gov (United States)

    Stefanutti, C; D'Alessandri, G; Petta, A; Harada-Shiba, M; Julius, U; Soran, H; Moriarty, P M; Romeo, S; Drogari, E; Jaeger, B R

    2015-05-01

    The MightyMedic (Multidisciplinary International Group for Hemapheresis TherapY and MEtabolic DIsturbances Contrast) Working Group has been founded in 2013. The leading idea was to establish an international network of interdisciplinary nature aimed at working to cross national borders research projects, clinical trials, educational initiatives (meetings, workshops, summer schools) in the field of metabolic diseases, namely hyperlipidemias, and diabetes, preventive cardiology, and atherosclerosis. Therapeutic apheresis, its indications and techniques, is a parallel field of investigation. The first on-line survey of the Group has been completed in the first half of 2014. The survey included # 24 Centers in Italy, Germany, Greece, UK, Sweden, Japan and USA. Relevant data have been collected on current practice in diagnosis, therapy and follow-up of dyslipidemias. 240 subjects with hyperlipidemia and treated with lipoprotein apheresis have been reported in the survey, but a large percentage of patients (35%) who could benefit from this therapeutic option are still treated by conventional drug approach. Genetic molecular diagnosis is performed in only 33% of patients while Lipoprotein(a) (Lp(a)) is included in cardiovascular disease risk assessment in 71% of participating Centers. New detailed investigations and prospective multicenter studies are needed to evaluate changes induced by the impact of updated indications and strategies, as well as new treatment options, targeting standardization of therapeutic and diagnostic approaches.

  20. Care of critically ill surgical patients using the 80-hour Accreditation Council of Graduate Medical Education work-week guidelines: a survey of current strategies.

    Science.gov (United States)

    Gordon, Chad R; Axelrad, Alex; Alexander, James B; Dellinger, R Phillip; Ross, Steven E

    2006-06-01

    As a result of the recently mandated work-hour restrictions, it has become more difficult to provide 24-hour intensive care unit (ICU) in-house coverage by the general surgical residents. To assess the current state of providing appropriate continuous care to surgical critical care patients during the era of resident work-hour constraints, a national survey was conducted by the Association of Program Directors of Surgery. The results revealed that 37 per cent of programs surveyed have residents other than general surgery housestaff providing cross-coverage and writing orders for surgical ICU patients. Residents in emergency medicine, anesthesia, family medicine, otorhinolaryngology, obstetrics/gynecology, internal medicine, urology, and orthopedic surgery have provided this cross-coverage. Some found it necessary to use physician extenders (i.e., nurse practitioners or physician assistants), thereby decreasing the burden of surgical housestaff coverage. The results indicated that 30 per cent use physician extenders to help cover the ICU during daytime hours and 11 per cent used them during nighttime hours. In addition, 24 per cent used a "night-float" system in an attempt to maintain continuous care, yet still adhere to the mandated guidelines. In conclusion, our survey found multiple strategies, including the use of physician extenders, a "night-float" system, and the use of nongeneral surgical residents in an attempt to provide continuous coverage for surgical ICU patients. The overall outcome of these new strategies still needs to be assessed before any beneficial results can be demonstrated.

  1. Quantum formalism to describe binocular rivalry.

    Science.gov (United States)

    Manousakis, Efstratios

    2009-11-01

    On the basis of the general character and operation of the process of perception, a formalism is sought to mathematically describe the subjective or abstract/mental process of perception. It is shown that the formalism of orthodox quantum theory of measurement, where the observer plays a key role, is a broader mathematical foundation which can be adopted to describe the dynamics of the subjective experience. The mathematical formalism describes the psychophysical dynamics of the subjective or cognitive experience as communicated to us by the subject. Subsequently, the formalism is used to describe simple perception processes and, in particular, to describe the probability distribution of dominance duration obtained from the testimony of subjects experiencing binocular rivalry. Using this theory and parameters based on known values of neuronal oscillation frequencies and firing rates, the calculated probability distribution of dominance duration of rival states in binocular rivalry under various conditions is found to be in good agreement with available experimental data. This theory naturally explains an observed marked increase in dominance duration in binocular rivalry upon periodic interruption of stimulus and yields testable predictions for the distribution of perceptual alteration in time.

  2. Recently described neoplasms of the sinonasal tract.

    Science.gov (United States)

    Bishop, Justin A

    2016-03-01

    Surgical pathology of the sinonasal region (i.e., nasal cavity and the paranasal sinuses) is notoriously difficult, due in part to the remarkable diversity of neoplasms that may be encountered in this area. In addition, a number of neoplasms have been only recently described in the sinonasal tract, further compounding the difficulty for pathologists who are not yet familiar with them. This manuscript will review the clinicopathologic features of some of the recently described sinonasal tumor types: NUT midline carcinoma, HPV-related carcinoma with adenoid cystic-like features, SMARCB1 (INI-1) deficient sinonasal carcinoma, biphenotypic sinonasal sarcoma, and adamantinoma-like Ewing family tumor.

  3. Disposition of recently described species of Penicillium

    NARCIS (Netherlands)

    Frisvad, Jens C.; Samson, Robert A.; Stolk, Amelia C.

    1990-01-01

    Hundred and twenty-two species, varieties, and new combinations of Penicillium, Eupenicillium, and Talaromyces described since 1977 have been studied taxonomically and screened for mycotoxin production. Only 48 taxa could be accepted: Eupenicillium angustiporcatum, E. cryptum, E. lineolatum, E. limo

  4. Disposition of recently described species of Penicillium

    NARCIS (Netherlands)

    Frisvad, Jens C.; Samson, Robert A.; Stolk, Amelia C.

    1990-01-01

    Hundred and twenty-two species, varieties, and new combinations of Penicillium, Eupenicillium, and Talaromyces described since 1977 have been studied taxonomically and screened for mycotoxin production. Only 48 taxa could be accepted: Eupenicillium angustiporcatum, E. cryptum, E. lineolatum, E. limo

  5. How Digital Native Learners Describe Themselves

    Science.gov (United States)

    Thompson, Penny

    2015-01-01

    Eight university students from the "digital native" generation were interviewed about the connections they saw between technology use and learning, and also their reactions to the popular press claims about their generation. Themes that emerged from the interviews were coded to show patterns in how digital natives describe themselves.…

  6. Is the Water Heating Curve as Described?

    Science.gov (United States)

    Riveros, H. G.; Oliva, A. I.

    2008-01-01

    We analysed the heating curve of water which is described in textbooks. An experiment combined with some simple heat transfer calculations is discussed. The theoretical behaviour can be altered by changing the conditions under which the experiment is modelled. By identifying and controlling the different parameters involved during the heating…

  7. A Dualistic Model To Describe Computer Architectures

    Science.gov (United States)

    Nitezki, Peter; Engel, Michael

    1985-07-01

    The Dualistic Model for Computer Architecture Description uses a hierarchy of abstraction levels to describe a computer in arbitrary steps of refinement from the top of the user interface to the bottom of the gate level. In our Dualistic Model the description of an architecture may be divided into two major parts called "Concept" and "Realization". The Concept of an architecture on each level of the hierarchy is an Abstract Data Type that describes the functionality of the computer and an implementation of that data type relative to the data type of the next lower level of abstraction. The Realization on each level comprises a language describing the means of user interaction with the machine, and a processor interpreting this language in terms of the language of the lower level. The surface of each hierarchical level, the data type and the language express the behaviour of a ma-chine at this level, whereas the implementation and the processor describe the structure of the algorithms and the system. In this model the Principle of Operation maps the object and computational structure of the Concept onto the structures of the Realization. Describing a system in terms of the Dualistic Model is therefore a process of refinement starting at a mere description of behaviour and ending at a description of structure. This model has proven to be a very valuable tool in exploiting the parallelism in a problem and it is very transparent in discovering the points where par-allelism is lost in a special architecture. It has successfully been used in a project on a survey of Computer Architecture for Image Processing and Pattern Analysis in Germany.

  8. Magnetic force microscopy/current contrast imaging: A new technique for internal current probing of ICs

    Energy Technology Data Exchange (ETDEWEB)

    Campbell, A.N.; Cole, E.I. Jr.; Dodd, B.A.; Anderson, R.E.

    1993-09-01

    This invited paper describes recently reported work on the application of magnetic force microscopy (MFM) to image currents in IC conductors [1]. A computer model for MFM imaging of IC currents and experimental results demonstrating the ability to determine current direction and magnitude with a resolution of {approximately} 1 mA dc and {approximately} 1 {mu}A ac are presented. The physics of MFM signal generation and applications to current imaging and measurement are described.

  9. Reader's Response: Describing and Analyzing Quantitative Data

    Science.gov (United States)

    McGrath, April L.

    2013-01-01

    The work of Harris and Martin (2012) on student motivations for choosing to complete online courses provides information on an important area of development within post-secondary education. As noted by the authors, online learning is an expanding field and learning more about why students choose online courses and their experiences in such courses…

  10. The interaction of approach-alcohol action tendencies, working memory capacity, and current task goals predicts the inability to regulate drinking behavior.

    Science.gov (United States)

    Sharbanee, Jason M; Stritzke, Werner G K; Wiers, Reinout W; Young, Paul; Rinck, Mike; MacLeod, Colin

    2013-09-01

    The inability to regulate alcohol consumption has been attributed to an imbalance between stimulus-driven behavioral biases, or action tendencies, and the ability to exert goal-directed control, or working memory capacity (WMC). Previous research assessing the interaction between these variables has not considered the effect of whether individuals' current goals or task demands require goal-directed control. Our aim was to examine the potential interaction of appetitive action tendencies and the ability to exert control over these action tendencies as a function of whether task demands require applying control for successful task completion. Two groups of social drinkers (n = 40 per group) who differed in their ability to regulate their alcohol consumption completed a novel variant of the Approach-Avoidance Task (AAT), which separately assessed approach and avoid trials. The approach and avoidance responses differentially require goal-directed control, depending on whether the task-relevant response is incongruent with the stimulus-driven action tendency. Results indicated that (a) group differences in AAT indices were only observed on trials that required an avoidance movement, which are trials where the task-relevant response would be incongruent with an approach action tendency, and (b) the extent of the group differences for these avoidance trials was moderated by individual differences in WMC, such that problem drinkers with lower WMC showed greater behavioral bias toward alcohol than those with higher WMC. These findings suggest that difficulties in regulating alcohol consumption arise from a complex interaction of action-tendencies, WMC, and current goals or task demands.

  11. Zulma Ageitos de Castellanos: Publications and status of described taxa.

    Science.gov (United States)

    Signorelli, Javier H; Urteaga, Diego; Teso, Valeria

    2015-10-28

    Zulma Ageitos de Castellanos was an Argentinian malacologist working in the "Facultad de Ciencias Naturales y Museo" at La Plata University where she taught invertebrate zoology between 1947 and 1990. Her scientific publications are listed in chronological order. Described genus-group and species-group taxa are listed. Information about the type locality and type material, and taxonomic remarks are also provided. Finally, type material of all described taxa was requested and, when located, illustrated.

  12. The Coriolis Effect Further Described in the Seventeenth Century

    CERN Document Server

    Graney, Christopher M

    2016-01-01

    Claude Francis Milliet Dechales described the Coriolis effect in his 1674 Cursus seu Mundus Mathematicus. Dechales discussed and illustrated the deflection of both falling bodies and of projectiles launched toward the poles that should occur on a rotating Earth. Interestingly, this was done as an argument against the Earth's rotation, the deflections not having been observed at the time. Dechales's work follows on that of Giovanni Battista Riccioli, who had also described the effect in his Almagestum Novum of 1651.

  13. The Facilitative Effect of Transcranial Direct Current Stimulation on Visuospatial Working Memory in Patients with Diabetic Polyneuropathy: A Pre-post Sham-Controlled Study.

    Science.gov (United States)

    Wu, Yi-Jen; Tseng, Philip; Huang, Han-Wei; Hu, Jon-Fan; Juan, Chi-Hung; Hsu, Kuei-Sen; Lin, Chou-Ching

    2016-01-01

    Diabetes mellitus can lead to diabetic polyneuropathy (DPN) and cognitive deficits that manifest as peripheral and central neuropathy, respectively. In this study we investigated the relationship between visuospatial working memory (VSWM) capacity and DPN severity, and attempted to improve VSWM in DPN patients via the use of transcranial direct current stimulation (tDCS). Sixteen DPN patients and 16 age- and education-matched healthy control subjects received Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) and Montreal Cognitive Assessment (MOCA) for baseline cognitive assessment. A forward- and backward-recall computerized Corsi block tapping task (CBT), both with and without a concurrent motor interference task was used to measure VSWM capacity. Each DPN patient underwent a pre-treatment CBT, followed by tDCS or sham treatment, then a post-treatment CBT on two separate days. We found that although patients with severe DPN (Dyck's grade 2a or 2b) showed comparable general intelligence scores on WAIS-IV as their age- and education-matched healthy counterparts, they nonetheless showed mild cognitive impairment (MCI) on MOCA and working memory deficit on digit-span test of WAIS-IV. Furthermore, patients' peripheral nerve conduction velocity (NCV) was positively correlated with their VSWM span in the most difficult CBT condition that involved backward-recall with motor interference such that patients with worse NCV also had lower VSWM span. Most importantly, anodal tDCS over the right DLPFC was able to improve low-performing patients' VSWM span to be on par with the high-performers, thereby eliminating the correlation between NCV and VSWM. In summary, these findings suggest that (1) MCI and severe peripheral neuropathy can coexist with unequal severity in diabetic patients, (2) the positive correlation of VSWM and NCV suggests a link between peripheral and central neuropathies, and (3) anodal tDCS over the right DLPFC can improve DPN patients' VSWM

  14. The Facilitative Effect of Transcranial Direct Current Stimulation on Visuospatial Working Memory in Patients with Diabetic Polyneuropathy: A Pre–post Sham-Controlled Study

    Science.gov (United States)

    Wu, Yi-Jen; Tseng, Philip; Huang, Han-Wei; Hu, Jon-Fan; Juan, Chi-Hung; Hsu, Kuei-Sen; Lin, Chou-Ching

    2016-01-01

    Diabetes mellitus can lead to diabetic polyneuropathy (DPN) and cognitive deficits that manifest as peripheral and central neuropathy, respectively. In this study we investigated the relationship between visuospatial working memory (VSWM) capacity and DPN severity, and attempted to improve VSWM in DPN patients via the use of transcranial direct current stimulation (tDCS). Sixteen DPN patients and 16 age- and education-matched healthy control subjects received Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) and Montreal Cognitive Assessment (MOCA) for baseline cognitive assessment. A forward- and backward-recall computerized Corsi block tapping task (CBT), both with and without a concurrent motor interference task was used to measure VSWM capacity. Each DPN patient underwent a pre-treatment CBT, followed by tDCS or sham treatment, then a post-treatment CBT on two separate days. We found that although patients with severe DPN (Dyck’s grade 2a or 2b) showed comparable general intelligence scores on WAIS-IV as their age- and education-matched healthy counterparts, they nonetheless showed mild cognitive impairment (MCI) on MOCA and working memory deficit on digit-span test of WAIS-IV. Furthermore, patients’ peripheral nerve conduction velocity (NCV) was positively correlated with their VSWM span in the most difficult CBT condition that involved backward-recall with motor interference such that patients with worse NCV also had lower VSWM span. Most importantly, anodal tDCS over the right DLPFC was able to improve low-performing patients’ VSWM span to be on par with the high-performers, thereby eliminating the correlation between NCV and VSWM. In summary, these findings suggest that (1) MCI and severe peripheral neuropathy can coexist with unequal severity in diabetic patients, (2) the positive correlation of VSWM and NCV suggests a link between peripheral and central neuropathies, and (3) anodal tDCS over the right DLPFC can improve DPN patients’ VSWM

  15. LiveDescribe: Can Amateur Describers Create High-Quality Audio Description?

    Science.gov (United States)

    Branje, Carmen J.; Fels, Deborah I.

    2012-01-01

    Introduction: The study presented here evaluated the usability of the audio description software LiveDescribe and explored the acceptance rates of audio description created by amateur describers who used LiveDescribe to facilitate the creation of their descriptions. Methods: Twelve amateur describers with little or no previous experience with…

  16. Frameworks for understanding and describing business models

    DEFF Research Database (Denmark)

    Nielsen, Christian; Roslender, Robin

    2014-01-01

    This chapter provides in a chronological fashion an introduction to six frameworks that one can apply to describing, understanding and also potentially innovating business models. These six frameworks have been chosen carefully as they represent six very different perspectives on business models ...... Maps (2001) • Intellectual Capital Statements (2003) • Chesbrough’s framework for Open Business Models (2006) • Business Model Canvas (2008)......This chapter provides in a chronological fashion an introduction to six frameworks that one can apply to describing, understanding and also potentially innovating business models. These six frameworks have been chosen carefully as they represent six very different perspectives on business models...... and in this manner “complement” each other. There are a multitude of varying frameworks that could be chosen from and we urge the reader to search and trial these for themselves. The six chosen models (year of release in parenthesis) are: • Service-Profit Chain (1994) • Strategic Systems Auditing (1997) • Strategy...

  17. Describing Spirituality at the End of Life.

    Science.gov (United States)

    Stephenson, Pam Shockey; Berry, Devon M

    2015-09-01

    Spirituality is salient to persons nearing the end of life (EOL). Unfortunately, researchers have not been able to agree on a universal definition of spirituality reducing the effectiveness of spiritual research. To advance spiritual knowledge and build an evidence base, researchers must develop creative ways to describe spirituality as it cannot be explicitly defined. A literature review was conducted to determine the common attributes that comprise the essence of spirituality, thereby creating a common ground on which to base spiritual research. Forty original research articles (2002 to 2012) focusing on EOL and including spiritual definitions/descriptions were reviewed. Analysis identified five attributes that most commonly described the essence of spirituality, including meaning, beliefs, connecting, self-transcendence, and value.

  18. On Gaussian Beams Described by Jacobi's Equation

    CERN Document Server

    Smith, Steven Thomas

    2013-01-01

    Gaussian beams describe the amplitude and phase of rays and are widely used to model acoustic propagation. This paper describes four new results in the theory of Gaussian beams. (1) It is shown that the \\v{C}erven\\'y equations for the amplitude and phase are equivalent to the classical Jacobi Equation of differential geometry. The \\v{C}erven\\'y equations describe Gaussian beams using Hamilton-Jacobi theory, whereas the Jacobi Equation expresses how Gaussian and Riemannian curvature determine geodesic flow on a Riemannian manifold. Thus the paper makes a fundamental connection between Gaussian beams and an acoustic channel's so-called intrinsic Gaussian curvature from differential geometry. (2) A new formula $\\pi(c/c")^{1/2}$ for the distance between convergence zones is derived and applied to several well-known profiles. (3) A class of "model spaces" are introduced that connect the acoustics of ducting/divergence zones with the channel's Gaussian curvature $K=cc"-(c')^2$. The "model" SSPs yield constant Gauss...

  19. CURRENT STATUS, TRENDS AND CONTRADICTIONS IN ORGANIZATION OF THE WORK OF THE STATE INSPECTION FOR ROAD TRAFFIC SAFETY OF TERRITORIAL SUBDIVISIONS OF THE MINISTRY OF INTERIOR OF RUSSIA

    Directory of Open Access Journals (Sweden)

    Nadezhda A. ERMOLAEVA

    2015-01-01

    Full Text Available The article is focused on the current state, trends and contradictions in organization of the work of the Russian traffic police subdivisions of the Ministry of Interior, following the requirements of the President regarding education of law-abiding citizens. After the road accident that had occurred in Khabarovsk region on August 5, 2015, when 68 people were injured, 15 people died, Vladimir Putin conducted a session of the Government of the Russian Federation. At the session, the President assigned the task to develop additional measures of safety on the roads. The complex plan, proposed by I. Shuvalov and aimed at reducing deaths on the roads, includes some different aspects: interaction with information agencies for publishing the data on dangerous sections of roads; strengthening of requirements to organizations engaged in transporting citizens; the use of helicopters to provide medical aid for victims of traffic accidents. The First Deputy Chairman of the Government of the Russian Federation paid special attention to education of road users, introduction of norms of driver’s behavior, emergence of the term «dangerous driving» and strengthening of the responsibility for driving while intoxicated. For many years, the educational function has been assigned to police officers, namely to the traffic police. However, in some regions of the Russian Federation there is a reduction of police regular staff officers, including the State Inspection for road traffic safety of territorial subdivisions of the Ministry of Interior of the Russian Federation. 

  20. Today's problems with the evaluation methods of full lightning impulse parameters as described in IEC 60060-1

    OpenAIRE

    Berlijn, S.; Kvarngren, M.; Garnacho, F.; Simon, P; Gockenbach, E.; P. Werle; Hackemack, K.; Wong, K.C.P.; Watts, M.

    1999-01-01

    In this paper the present problems with the evaluation methods for lightning impulse parameters, as defined in IEC 60060-1, are described. Also the current practice of evaluation in many laboratories world-wide, that is obtained by a questionnaire, is presented. Some of the work performed up the present time and the initial conclusions are reported, then some recommendations are made for future work.

  1. Using fundamental equations to describe basic phenomena

    DEFF Research Database (Denmark)

    Jakobsen, Arne; Rasmussen, Bjarne D.

    1999-01-01

    constraining the total charge of refrigerant in the system, which is missing.In traditional mathematical modelling of a refrigeration cycle/system, the influence from the total charge of refrigerant on the system behaviour is normally not modelled explicitly. Instead, parameters such as superheat......When the fundamental thermodynamic balance equations (mass, energy, and momentum) are used to describe the processes in a simple refrigeration system, then one finds that the resulting equation system will have a degree of freedom equal to one. Further investigations reveal that it is the equation...... and the before mentioned parameters. In doing so, a systematic use of control volumes for modelling a refrigeration system is outlined....

  2. Dispersive models describing mosquitoes’ population dynamics

    Science.gov (United States)

    Yamashita, W. M. S.; Takahashi, L. T.; Chapiro, G.

    2016-08-01

    The global incidences of dengue and, more recently, zica virus have increased the interest in studying and understanding the mosquito population dynamics. Understanding this dynamics is important for public health in countries where climatic and environmental conditions are favorable for the propagation of these diseases. This work is based on the study of nonlinear mathematical models dealing with the life cycle of the dengue mosquito using partial differential equations. We investigate the existence of traveling wave solutions using semi-analytical method combining dynamical systems techniques and numerical integration. Obtained solutions are validated through numerical simulations using finite difference schemes.

  3. Is an eclipse described in the Odyssey?

    Science.gov (United States)

    Baikouzis, Constantino; Magnasco, Marcelo O

    2008-07-01

    Plutarch and Heraclitus believed a certain passage in the 20th book of the Odyssey ("Theoclymenus's prophecy") to be a poetic description of a total solar eclipse. In the late 1920s, Schoch and Neugebauer computed that the solar eclipse of 16 April 1178 B.C.E. was total over the Ionian Islands and was the only suitable eclipse in more than a century to agree with classical estimates of the decade-earlier sack of Troy around 1192-1184 B.C.E. However, much skepticism remains about whether the verses refer to this, or any, eclipse. To contribute to the issue independently of the disputed eclipse reference, we analyze other astronomical references in the Epic, without assuming the existence of an eclipse, and search for dates matching the astronomical phenomena we believe they describe. We use three overt astronomical references in the epic: to Boötes and the Pleiades, Venus, and the New Moon; we supplement them with a conjectural identification of Hermes's trip to Ogygia as relating to the motion of planet Mercury. Performing an exhaustive search of all possible dates in the span 1250-1115 B.C., we looked to match these phenomena in the order and manner that the text describes. In that period, a single date closely matches our references: 16 April 1178 B.C.E. We speculate that these references, plus the disputed eclipse reference, may refer to that specific eclipse.

  4. Using neural networks to describe tracer correlations

    Directory of Open Access Journals (Sweden)

    D. J. Lary

    2004-01-01

    Full Text Available Neural networks are ideally suited to describe the spatial and temporal dependence of tracer-tracer correlations. The neural network performs well even in regions where the correlations are less compact and normally a family of correlation curves would be required. For example, the CH4-N2O correlation can be well described using a neural network trained with the latitude, pressure, time of year, and methane volume mixing ratio (v.m.r.. In this study a neural network using Quickprop learning and one hidden layer with eight nodes was able to reproduce the CH4-N2O correlation with a correlation coefficient between simulated and training values of 0.9995. Such an accurate representation of tracer-tracer correlations allows more use to be made of long-term datasets to constrain chemical models. Such as the dataset from the Halogen Occultation Experiment (HALOE which has continuously observed CH4  (but not N2O from 1991 till the present. The neural network Fortran code used is available for download.

  5. On Redundancy in Describing Linguistic Systems

    Directory of Open Access Journals (Sweden)

    Vladimir Borissov Pericliev

    2015-12-01

    Full Text Available On Redundancy in Describing Linguistic Systems The notion of system of linguistic elements figures prominently in most post-Saussurian linguistics up to the present. A “system” is the network of the contrastive (or, distinctive features each element in the system bears to the remaining elements. The meaning (valeur of each element in the system is the set of features that are necessary and jointly sufficient to distinguish this element from all others. The paper addresses the problems of “redundancy”, i.e. the occurrence of features that are not strictly necessary in describing an element in a system. Redundancy is shown to smuggle into the description of linguistic systems, this infelicitous practice illustrated with some examples from the literature (e.g. the classical phonemic analysis of Russian by Cherry, Halle, and Jakobson, 1953. The logic and psychology of the occurrence of redundancy are briefly sketched and it is shown that, in addition to some other problems, redundancy leads to a huge and unresolvable ambiguity of descriptions of linguistic systems (the Buridan’s ass problem.

  6. Comparing Theoretical Perspectives in Describing Mathematics Departments: Complexity and Activity

    Science.gov (United States)

    Beswick, Kim; Watson, Anne; De Geest, Els

    2010-01-01

    We draw on two studies of mathematics departments in 11-18 comprehensive maintained schools in England to compare and contrast the insights provided by differing theoretical perspectives. In one study, activity theory was used to describe common features of the work of three departments. In the other, a mathematics department was viewed and…

  7. Analytical solutions describing the operation of a rotating magnetic field transducer

    Energy Technology Data Exchange (ETDEWEB)

    Savin, A.; Grimberg, R.; Mihalache, O. [Inst. of Technical Physics, Iasi (Romania). Dept. of NDT

    1997-01-01

    This work presents the analytical solutions describing the operation of a rotating magnetic field transducer used in the eddy current defectoscopy for detecting the long flaws situated parallelly to the inspected piece generatrix. The method uses the expanding of the real transducer`s three-phase system into an infinite sequence of axial and longitudinal currents whose intensity is given by a Fourier expansion, estimating the electromotive voltage induced in the transducer. By solving the equation of diffusion for the three media and considering the boundary conditions, the vector magnetic potential is determined for each medium. This work also presents the most important theoretical parameters of the transducer, as well as the experimental graphs obtained for concrete cases of the transducer`s applications.

  8. The facilitative effect of transcranial direct current stimulation on visuospatial working memory in patients with diabetic polyneuropathy: a pre-post sham-controlled study

    Directory of Open Access Journals (Sweden)

    YI-JEN WU

    2016-09-01

    Full Text Available Diabetes mellitus (DM can lead to diabetic polyneuropathy (DPN and cognitive deficits that manifest as peripheral and central neuropathy, respectively. In this study we investigated the relationship between visuospatial working memory (VSWM capacity and DPN severity, and attempted to improve VSWM in DPN patients via the use of transcranial direct current stimulation (tDCS. Sixteen DPN patients and sixteen age- and education-matched healthy control subjects received Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV and Montreal Cognitive Assessment (MOCA for baseline cognitive assessment. A forward- and backward-recall computerized Corsi block tapping task (CBT, both with and without a concurrent motor interference task was used to measure VSWM capacity. Each DPN patient underwent a pre-treatment CBT, followed by tDCS or sham treatment, then a post-treatment CBT on two separate days. We found that although patients with severe DPN (Dyck’s grade 2a or 2b showed comparable general intelligence scores on WAIS-IV as their age- and education-matched healthy counterparts, they nonetheless showed mild cognitive impairment on MOCA and working memory deficit on digit-span test of WAIS-IV. Furthermore, patients’ peripheral nerve conduction velocity (NCV was positively correlated with their VSWM span in the most difficult CBT condition that involved backward-recall with motor interference such that patients with worse NCV also had lower VSWM span. Most importantly, anodal tDCS over the right DLPFC was able to improve low-performing patients’ VSWM span to be on par with the high-performers, thereby eliminating the correlation between NCV and VSWM. In summary, these findings suggest that 1 mild cognitive impairment and severe peripheral neuropathy can coexist with unequal severity in diabetic patients, 2 the positive correlation of VSWM and NCV suggests a link between peripheral and central neuropathies and 3 anodal tDCS over the right DLPFC can

  9. Stimulated recall interviews for describing pragmatic epistemology

    Science.gov (United States)

    Shubert, Christopher W.; Meredith, Dawn C.

    2015-12-01

    Students' epistemologies affect how and what they learn: do they believe physics is a list of equations, or a coherent and sensible description of the physical world? In order to study these epistemologies as part of curricular assessment, we adopt the resources framework, which posits that students have many productive epistemological resources that can be brought to bear as they learn physics. In previous studies, these epistemologies have been either inferred from behavior in learning contexts or probed through surveys or interviews outside of the learning context. We argue that stimulated recall interviews provide a contextually and interpretively valid method to access students' epistemologies that complement existing methods. We develop a stimulated recall interview methodology to assess a curricular intervention and find evidence that epistemological resources aptly describe student epistemologies.

  10. A Semantic Approach to Describe Geospatial Resources

    Science.gov (United States)

    de Sousa, Sidney Roberto

    Geographic information systems (GIS) are increasingly using geospatial data from the Web to produce geographic information. One big challenge is to find the relevant data, which often is based on keywords or even file names. However, these approaches lack semantics. Thus, it is necessary to provide mechanisms to prepare data to help retrieval of semantically relevant data. This paper proposes an approach to attack this problem. This approach is based on semantic annotations that use geographic metadata and ontologies to describe heterogeneous geospatial data. Semantic annotations are RDF/XML files that rely on a FGDC metadata schema, filled with appropriate ontology terms, and stored in a XML database. The proposal is illustrated by a case study of semantic annotations of agricultural resources, using domain ontologies.

  11. Does Guru Granth Sahib describe depression?

    Science.gov (United States)

    Kalra, Gurvinder; Bhui, Kamaldeep; Bhugra, Dinesh

    2013-01-01

    Sikhism is a relatively young religion, with Guru Granth Sahib as its key religious text. This text describes emotions in everyday life, such as happiness, sadness, anger, hatred, and also more serious mental health issues such as depression and psychosis. There are references to the causation of these emotional disturbances and also ways to get out of them. We studied both the Gurumukhi version and the English translation of the Guru Granth Sahib to understand what it had to say about depression, its henomenology, and religious prescriptions for recovery. We discuss these descriptions in this paper and understand its meaning within the context of clinical depression. Such knowledge is important as explicit descriptions about depression and sadness can help encourage culturally appropriate assessment and treatment, as well as promote public health through education.

  12. Using default inheritance to describe LTAG

    CERN Document Server

    Evans, R; Weir, D; Evans, Roger; Gazdar, Gerald; Weir, David

    1995-01-01

    We present the results of an investigation into how the set of elementary trees of a Lexicalized Tree Adjoining Grammar can be represented in the lexical knowledge representation language DATR (Evans & Gazdar 1989a,b). The LTAG under consideration is based on the one described in Abeille et al. (1990). Our approach is similar to that of Vijay-Shanker & Schabes (1992) in that we formulate an inheritance hierarchy that efficiently encodes the elementary trees. However, rather than creating a new representation formalism for this task, we employ techniques of established utility in other lexically-oriented frameworks. In particular, we show how DATR's default mechanism can be used to eliminate the need for a non-immediate dominance relation in the descriptions of the surface LTAG entries. This allows us to embed the tree structures in the feature theory in a manner reminiscent of HPSG subcategorisation frames, and hence express lexical rules as relations over feature structures.

  13. Describing Ecosystem Complexity through Integrated Catchment Modeling

    Science.gov (United States)

    Shope, C. L.; Tenhunen, J. D.; Peiffer, S.

    2011-12-01

    Land use and climate change have been implicated in reduced ecosystem services (ie: high quality water yield, biodiversity, and agricultural yield. The prediction of ecosystem services expected under future land use decisions and changing climate conditions has become increasingly important. Complex policy and management decisions require the integration of physical, economic, and social data over several scales to assess effects on water resources and ecology. Field-based meteorology, hydrology, soil physics, plant production, solute and sediment transport, economic, and social behavior data were measured in a South Korean catchment. A variety of models are being used to simulate plot and field scale experiments within the catchment. Results from each of the local-scale models provide identification of sensitive, local-scale parameters which are then used as inputs into a large-scale watershed model. We used the spatially distributed SWAT model to synthesize the experimental field data throughout the catchment. The approach of our study was that the range in local-scale model parameter results can be used to define the sensitivity and uncertainty in the large-scale watershed model. Further, this example shows how research can be structured for scientific results describing complex ecosystems and landscapes where cross-disciplinary linkages benefit the end result. The field-based and modeling framework described is being used to develop scenarios to examine spatial and temporal changes in land use practices and climatic effects on water quantity, water quality, and sediment transport. Development of accurate modeling scenarios requires understanding the social relationship between individual and policy driven land management practices and the value of sustainable resources to all shareholders.

  14. Management of stroke as described by Ibn Sina (Avicenna) in the Canon of Medicine.

    Science.gov (United States)

    Zargaran, Arman; Zarshenas, Mohammad M; Karimi, Aliasghar; Yarmohammadi, Hassan; Borhani-Haghighi, Afshin

    2013-11-15

    Stroke or cerebrovascular accident (CVA) is caused by a disturbance of the blood supply to the brain and an accruing loss of brain function. The first recorded observations were in 2455 BC and it has been studied intensely by ancient physicians throughout history. In the early medieval period, Ibn Sina (980-1025 AD) called stroke sekteh and described it extensively. Some of Ibn Sina's definitions and his etiology of stroke are based on humoral theories and cannot be compared with medical current concepts, but most of his descriptions concur with current definitions. This review examines the definition and etiology, clinical manifestations, prognosis, differential diagnosis, and interventions for stroke based on Ibn Sina's epic work, Canon of Medicine. The pharmacological effects of medicinal herbs suggested by Ibn Sina for stroke are examined in light of current knowledge. © 2013.

  15. DESCRIBING LYMPHEDEMA IN FEMALES WITH TURNER SYNDROME.

    Science.gov (United States)

    Rothbauer, J; Driver, S; Callender, L

    2015-09-01

    Turner syndrome (TS) is a chromosomal condition affecting an estimated 1 in 2,500 girls where the second X chromosome is missing, or partially formed. This abnormality affects multiple body systems and can lead to short stature, cardiac, neural, and renal abnormalities. Due to the chronic, non-life threatening nature of lymphedema in comparison to other symptoms of TS, it is often ignored by girls and women with TS and their physicians. Consequently, little is known about how lymphedema affects girls and women with TS across the lifespan. Therefore, the objective of the study was to deliver an online survey for females with TS and caregivers in the US, UK, and Canada to provide a worldwide perspective on their current experience with lymphedema within the spectrum of TS. There were 219 participants who completed the survey, and we were able to identify incidence and characteristics of lymphedema across the lifespan. In addition, we found that females with 45,X karyotyping were more likely to report lymphedema symptoms. Lymphedema is not the most significant concern of females with TS, but education, physician evaluation, and assistance with referrals for treatment and management would improve the ease of managing lymphedema in girls and women with TS.

  16. Describing and Enhancing Collaboration at the Computer

    Directory of Open Access Journals (Sweden)

    Ken Beatty

    2002-06-01

    Full Text Available Computer-based learning materials differ from classroom practice in that they seldom explicitly offer opportunities for collaboration. Despite this, students do collaborate, helping one another through the content and affordances of computer materials. But, in doing so, students meet with challenges. Paradoxically, these challenges can either inspire or discourage learning and second-language acquisition. This paper, based on research with twenty Hong Kong university students in a controlled experiment, evaluates challenges to collaboration at the computer as evidenced by discourse. The students were videotaped and their discourse transcribed and evaluated both qualitatively and quantitatively, according to a set of discourse markers created to describe collaborative, non-collaborative and ambiguous strategies. The paper begins by exploring the differences between collaboration and similar terms such as teamwork and cooperative learning then goes on to define collaboration in the context of computer-assisted learning. It ends by presenting practical suggestions for software designers, teachers and students to enhance collaboration at the computer.

  17. Can the genetic code be mathematically described?

    Science.gov (United States)

    Gonzalez, Diego L

    2004-04-01

    From a mathematical point of view, the genetic code is a surjective mapping between the set of the 64 possible three-base codons and the set of 21 elements composed of the 20 amino acids plus the Stop signal. Redundancy and degeneracy therefore follow. In analogy with the genetic code, non-power integer-number representations are also surjective mappings between sets of different cardinality and, as such, also redundant. However, none of the non-power arithmetics studied so far nor other alternative redundant representations are able to match the actual degeneracy of the genetic code. In this paper we develop a slightly more general framework that leads to the following surprising results: i) the degeneracy of the genetic code is mathematically described, ii) a new symmetry is uncovered within this degeneracy, iii) by assigning a binary string to each of the codons, their classification into definite parity classes according to the corresponding sequence of bases is made possible. This last result is particularly appealing in connection with the fact that parity coding is the basis of the simplest strategies devised for error correction in man-made digital data transmission systems.

  18. A thermodynamical formalism describing mechanical interactions

    Science.gov (United States)

    Andrade, R. F. S.; Souza, A. M. C.; Curado, E. M. F.; Nobre, F. D.

    2014-10-01

    The dynamical behavior of an overdamped mechanical model devoid of any usual thermal effects is analyzed by a formalism that is similar to usual thermodynamics, and completely independent of any ad hoc assumption of a probability distribution of states in phase space of the mechanical model. It leads to the definition of a new entropy function, which does not coincide with the usual thermodynamical entropy. The new step making the difference to previous studies of this system is the identification of two non-equivalent mechanical interaction mechanisms, which are defined and identified as work and pseudo-heat. Together with the introduced effective temperature θ, they make it possible to characterize the equivalent to isothermal, adiabatic, isobaric, and isochoric processes. Three statements, formally analogous to the zeroth, first, and second law of thermodynamics, are issued. The statement of the second law results from the asymmetry in the way energy can be exchanged along the two processes. A Carnot cycle is defined, for which the efficiency is expressed in terms of θ in the operating pseudo-heat reservoirs. The analogous Clausius theorem for the system operating an arbitrary reversible cycle is proved, leading to the new entropy function. Consequences of the extension of thermodynamic formalism to mechanical models with different processes of transferring energy are discussed.

  19. Nurse managers describe their practice environments.

    Science.gov (United States)

    Warshawsky, Nora E; Lake, Sharon W; Brandford, Arica

    2013-01-01

    Hospital work environments that support the professional practice of nurses are critical to patient safety. Nurse managers are responsible for creating these professional practice environments for staff nurses, yet little is known about the environments needed to support nurse managers. Domains of nurse managers' practice environment have recently been defined. This is a secondary analysis of 2 cross-sectional studies of organizational characteristics that influence nurse manager practice. Content analysis of the free text comments from 127 nurse managers was used to illustrate the 8 domains of nurse managers' practice environments. Nurse managers valued time spent with their staff; therefore, workloads must permit meaningful interaction. Directors demonstrated trust when they empowered nurse managers to make decisions. Administrative leaders should build patient safety cultures on the basis of shared accountability and mutual respect among the health care team. The expectations of nurse managers have greatly expanded in the volume and complexity of direct reports, patient care areas, and job functions. The nurse managers in this analysis reported characteristics of their practice environments that limit their role effectiveness and may negatively impact organizational performance. Further research is needed to understand the effects of nurse managers' practice environments on staff and patient outcomes.

  20. DC-Compensated Current Transformer.

    Science.gov (United States)

    Ripka, Pavel; Draxler, Karel; Styblíková, Renata

    2016-01-20

    Instrument current transformers (CTs) measure AC currents. The DC component in the measured current can saturate the transformer and cause gross error. We use fluxgate detection and digital feedback compensation of the DC flux to suppress the overall error to 0.15%. This concept can be used not only for high-end CTs with a nanocrystalline core, but it also works for low-cost CTs with FeSi cores. The method described here allows simultaneous measurements of the DC current component.

  1. An autocatalytic kinetic model for describing microbial growth during fermentation.

    Science.gov (United States)

    Ibarz, Albert; Augusto, Pedro E D

    2015-01-01

    The mathematical modelling of the behaviour of microbial growth is widely desired in order to control, predict and design food and bioproduct processing, stability and safety. This work develops and proposes a new semi-empirical mathematical model, based on an autocatalytic kinetic, to describe the microbial growth through its biomass concentration. The proposed model was successfully validated using 15 microbial growth patterns, covering the three most important types of microorganisms in food and biotechnological processing (bacteria, yeasts and moulds). Its main advantages and limitations are discussed, as well as the interpretation of its parameters. It is shown that the new model can be used to describe the behaviour of microbial growth.

  2. Realistic f(T) model describing the de Sitter epoch of the dark energy dominated universe

    CERN Document Server

    Nassur, S B; Rodrigues, M E; Houndjo, M J S; Tossa, J

    2015-01-01

    We consider an exponential model within the so-called f(T) theory of gravity, where $T$ denotes the torsion scalar. We focus our work on a cosmological feature of such a model, checking whether it may describe the de Sitter stage of the current universe through the analysis of the redshift z. Our results shows that the model reproduces the de Sitter stage only for low-redshifts, where the perturbation function goes toward zero as the low values of the redshift are reached, whereas the effective parameter of equation of state goes to -1, which is the expected behavior for any model able to reproduce de Sitter stage.

  3. Design and application of air-conditioning suit based on eddy current cooling principle for distribution network working with power uninterrupted

    Science.gov (United States)

    Xu, Li; Liu, Lanlan; Niu, Jie; Tang, Li; Li, Jinliang; Zhou, Zhanfan; Long, Chenhai; Yang, Qi; Yi, Ziqi; Guo, Hao; Long, Yang; Fu, Yanyi

    2017-05-01

    As social requirement of power supply reliability keeps rising, distribution network working with power uninterrupted has been widely carried out, while the high - temperature operating environment in summer can easily lead to physical discomfort for the operators, and then lead to safety incidents. Aiming at above problem, air-conditioning suit for distribution network working with power uninterrupted has been putted forward in this paper, and the structure composition and cooling principle of which has been explained, and it has been ultimately put to on-site application. The results showed that, cooling effect of air-conditioning suits was remarkable, and improved the working environment for the operators effectively, which is of great significance to improve Chinese level of working with power uninterrupted, reduce the probability of accidents and enhance the reliability of power supply.

  4. Does "Social Work Abstracts" Work?

    Science.gov (United States)

    Holden, Gary; Barker, Kathleen; Covert-Vail, Lucinda; Rosenberg, Gary; Cohen, Stephanie A.

    2008-01-01

    Objective: The current study seeks to provide estimates of the adequacy of journal coverage in the Social Work Abstracts (SWA) database. Method: A total of 23 journals listed in the Journal Citation Reports social work category during the 1997 to 2005 period were selected for study. Issue-level coverage estimates were obtained for SWA and…

  5. Does "Social Work Abstracts" Work?

    Science.gov (United States)

    Holden, Gary; Barker, Kathleen; Covert-Vail, Lucinda; Rosenberg, Gary; Cohen, Stephanie A.

    2008-01-01

    Objective: The current study seeks to provide estimates of the adequacy of journal coverage in the Social Work Abstracts (SWA) database. Method: A total of 23 journals listed in the Journal Citation Reports social work category during the 1997 to 2005 period were selected for study. Issue-level coverage estimates were obtained for SWA and…

  6. Assessing the Driver’s Current Level of Working Memory Load with High Density Functional Near-infrared Spectroscopy: A Realistic Driving Simulator Study

    Directory of Open Access Journals (Sweden)

    Anirudh Unni

    2017-04-01

    Full Text Available Cognitive overload or underload results in a decrease in human performance which may result in fatal incidents while driving. We envision that driver assistive systems which adapt their functionality to the driver’s cognitive state could be a promising approach to reduce road accidents due to human errors. This research attempts to predict variations of cognitive working memory load levels in a natural driving scenario with multiple parallel tasks and to reveal predictive brain areas. We used a modified version of the n-back task to induce five different working memory load levels (from 0-back up to 4-back forcing the participants to continuously update, memorize, and recall the previous ‘n’ speed sequences and adjust their speed accordingly while they drove for approximately 60 min on a highway with concurrent traffic in a virtual reality driving simulator. We measured brain activation using multichannel whole head, high density functional near-infrared spectroscopy (fNIRS and predicted working memory load level from the fNIRS data by combining multivariate lasso regression and cross-validation. This allowed us to predict variations in working memory load in a continuous time-resolved manner with mean Pearson correlations between induced and predicted working memory load over 15 participants of 0.61 [standard error (SE 0.04] and a maximum of 0.8. Restricting the analysis to prefrontal sensors placed over the forehead reduced the mean correlation to 0.38 (SE 0.04, indicating additional information gained through whole head coverage. Moreover, working memory load predictions derived from peripheral heart rate parameters achieved much lower correlations (mean 0.21, SE 0.1. Importantly, whole head fNIRS sampling revealed increasing brain activation in bilateral inferior frontal and bilateral temporo-occipital brain areas with increasing working memory load levels suggesting that these areas are specifically involved in workload

  7. Pinning Properties of Commercial Nb-Ti Wires Described by a 2-Components Model

    CERN Document Server

    Muzzi, L; Zignani, Chiarasole Fiamozzi; De Marzi, Gianluca; Muzzi, Luigi; Dominguez, Cesar Octavio; Bottura, Luca; Napolitano, Mathieu; Viola, Rosario; Affinito, Luigi; della Corte, Antonio; Le Naour, Sandrine

    2010-01-01

    We report on the magnetic and transport characterization of different NbTi commercial strands, carried out at variable temperature and magnetic field. From the critical current densities extracted from transport measurements and magnetization cycles we were able to calculate the normalized bulk pinning forces. The curves show good temperature scaling throughout the explored temperature range, and the reduced pinning force can be described by a simple two-components model system. The extension of the 2-components description of the pinning force to an expression for the critical current density gives a very good agreement with experimental measurements over the whole explored B, T range. The model works for all investigated samples, which are different in size, Cu:nonCu ratios, filament diameters and layouts. These results suggest that pinning mechanisms in conventional NbTi strands should be revised, since Nb-Ti composition gradients and grain boundaries seems to play a not negligible role.

  8. Dependence of an ion current on a working voltage for Hall thruster TAL-WSF/D-55. Simple theory and experiment

    Science.gov (United States)

    Shumilin, Nikolay; Shumilin, Vladimir; Shumilin, Alexander

    2014-10-01

    In paper the simple model for the definition of interrelation between integral characteristics of Hall thrusters with an anode layer is offered. Concrete calculations were made for one of most often used Hall thrusters - TAL-WSF/D-55. While analysing the received theoretical dependences an attempt of comparison with results of an experimental research of thruster TAL-WSF/D-55 was made. With this purpose experimental dependence of specific impulse of Hall thruster TAL-WSF/D-55 on working voltage in range from 150 up to 350 V resulted in was used. It appeared, that these data contain some serious mistake and there is no reference to original works in this paper. In present report this mistake is corrected using original works. It is shown, that the offered simple model gives results close to a reality both qualitatively and quantitatively.

  9. Motion in a stochastic layer described by symbolic dynamics

    Energy Technology Data Exchange (ETDEWEB)

    Misguich, J.H.; Reuss, J.D. [Association Euratom-CEA, Centre d`Etudes Nucleaires de Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee; Elskens, Y. [Universite de Provence, 13 - Marseille (France); Balescu, R. [Association Euratom, Brussels (Belgium)

    1997-07-01

    The motion in the stochastic layer surrounding an island can be studied by using the standard map: this problem is of direct relevance to the diffusion of magnetic field lines in a tokamak. In a previous work it was shown that this process can be adequately modelled by a continuous time random walk (CTRW) describing transitions of the running point between three basins representing, respectively, trapped motion around the island, and passing motion above or below the island. The sticking property of the island deeply modifies the nature of the transport process, leading to sub-diffusive behavior. In the present work it is shown that the motion can be analyzed in terms of a symbolic dynamics which leads to the possibility of an automatic measurement of the data necessary for the construction of the CTRW. The logical features of the procedure are described, and the method is applied to an analysis of long time series, thus completing the results of the previous work. (author) 10 refs.

  10. Case work

    DEFF Research Database (Denmark)

    Shaw, Ian Frank

    2016-01-01

    Answers to the question just what is the ?case? partly defined the fields of sociology and social work in early 20th century Chicago. Drawing on the archives of the University of Chicago, I describe and appraise the way the ?case? figured in social work at Chicago and elsewhere. I ask...... the corresponding question of sociology. Finally, I briefly consider why not much came of social work and sociology ploughing similar territory in ways that served for a time to hallmark their identities. This analysis opens up ways of rethinking how social work and sociological research are distinctive...

  11. The interaction of approach-alcohol action tendencies, working memory capacity, and current task goals predicts the inability to regulate drinking behavior

    NARCIS (Netherlands)

    Sharbanee, J.M.; Stritzke, W.G.K.; Wiers, R.W.H.J.; Young, P.; Rinck, M.; McLeod, C.

    2013-01-01

    The inability to regulate alcohol consumption has been attributed to an imbalance between stimulus-driven behavioral biases, or action tendencies, and the ability to exert goal-directed control, or working memory capacity (WMC). Previous research assessing the interaction between these variables has

  12. Working-Class Girls in a Foreign Land. Social Class and Settling into University in a Cross-Current between Two Cultures

    Science.gov (United States)

    Käyhkö, Mari

    2015-01-01

    In Finland, the financial status of a family does not in general place any restrictions on a person's studies. However, in spite of equality of opportunity, class as a cultural and social issue is a significant factor guiding the education of young people. In the article, I analyse women with a working-class background studying at university,…

  13. Cumulative exposure to work-related traumatic events and current post-traumatic stress disorder in New York City's first responders.

    Science.gov (United States)

    Geronazzo-Alman, Lupo; Eisenberg, Ruth; Shen, Sa; Duarte, Cristiane S; Musa, George J; Wicks, Judith; Fan, Bin; Doan, Thao; Guffanti, Guia; Bresnahan, Michaeline; Hoven, Christina W

    2017-04-01

    Cumulative exposure to work-related traumatic events (CE) is a foreseeable risk for psychiatric disorders in first responders (FRs). Our objective was to examine the impact of work-related CE that could serve as predictor of posttraumatic stress disorder (PTSD) and/or depression in FRs. Cross-sectional examination of previous CE and past-month PTSD outcomes and depression in 209 FRs. Logistic (probable PTSD; probable depression) and Poisson regressions (PTSD score) of the outcomes on work-related CE indexes, adjusting for demographic variables. Differences across occupational groups were also examined. Receiver operating characteristic analysis determined the sensitivity and specificity of CE indexes. All indexes were significantly and differently associated with PTSD; associations with depression were non-significant. The index capturing the sheer number of different incidents experienced regardless of frequency ('Variety') showed conceptual, practical and statistical advantages compared to other indexes. In general, the indexes showed poor to fair discrimination accuracy. Work-related CE is specifically associated with PTSD. Focusing on the variety of exposures may be a simple and effective strategy to predict PTSD in FRs. Further research on sensitivity and specificity of exposure indexes, preferably examined prospectively, is needed and could lead to early identification of individuals at risk. Copyright © 2016 Elsevier Inc. All rights reserved.

  14. Ruin Probabilities of a Surplus Process Described by PDMPs

    Institute of Scientific and Technical Information of China (English)

    Jing-min He; Rong Wu; Hua-yue Zhang

    2008-01-01

    In this paper we mainly study the ruin probability of a surplus process described by a piecewise deterministic Markov process (PDMP). An integro-differentiai equation for the ruin probability is derived. Under a certain assumption, it can be transformed into the ruin probability of a risk process whose premiums depend on the current reserves. Using the same argument as that in Asmussen and Nielsen[2], the ruin probability and its upper bounds are obtained. Finally, we give an analytic expression for ruin probability and its upper bounds when the claim-size is exponentially distributed.

  15. Current perspectives in stem cell therapy for spinal cord repair in humans: a review of work from the past 10 years

    Directory of Open Access Journals (Sweden)

    Eric Domingos Mariano

    2014-06-01

    Full Text Available Spinal cord injury (SCI and amyotrophic laterals sclerosis (ALS are devastating neurological conditions that affect individuals worldwide, significantly reducing quality of life, both for patients and their relatives. Objective : The present review aims to summarize the multiple restorative approaches being developed for spinal cord repair, the use of different stem cell types and the current knowledge regarding stem cell therapy. Method : Review of the literature from the past 10 years of human studies using stem cell transplantation as the main therapy, with or without adjuvant therapies. Conclusion : The current review offers an overview of the state of the art regarding spinal cord restoration, and serves as a starting point for future studies.

  16. Extended nonlinear feedback model for describing episodes of high inflation

    OpenAIRE

    Szybisz, M A; Szybisz, L.

    2016-01-01

    An extension of the nonlinear feedback (NLF) formalism to describe regimes of hyper- and high-inflation in economy is proposed in the present work. In the NLF model the consumer price index (CPI) exhibits a finite time singularity of the type $1/(t_c -t)^{(1- \\beta)/\\beta}$, with $\\beta>0$, predicting a blow up of the economy at a critical time $t_c$. However, this model fails in determining $t_c$ in the case of weak hyperinflation regimes like, e.g., that occurred in Israel. To overcome this...

  17. Workplace culture in psychiatric nursing described by nurses.

    Science.gov (United States)

    Kurjenluoma, K; Rantanen, A; McCormack, B; Slater, P; Hahtela, N; Suominen, T

    2017-04-24

    This study looks to describe the workplace culture from the viewpoints of stress, job satisfaction and practice environment. Data were collected from nurses (n = 109) using a web-based survey, The Person-Centred Nursing Index, from two purposefully selected hospital districts in Finland. Data were statistically analysed. Nurses described their workplace culture in slightly positive terms. Nurses only occasionally experienced stress (mean = 2.56, SD = 0.55) and were fairly satisfied with their job (mean = 4.75, SD = 0.66) and their practice environment (mean = 4.42, SD = 0.81). Demographic variables such as the nurses' age, length of time in nursing, time at their present hospital, working shifts and their use of patient restriction were more frequently associated with their perceived workplace culture. Older nurses and those with a longer work history in the nursing profession tended to be more satisfied with their workplace culture in psychiatric nursing. Young and/or newly graduated nurses felt more negatively on their workplace culture; this issue should be recognised and addressed with appropriate support and mentoring. Nurses who used restrictive measures were more often less satisfied with their workplace culture. Continuous efforts are needed to reduce the use of coercive measures, which challenge also the managers to support nursing practice to be more person-centred. © 2017 Nordic College of Caring Science.

  18. Summary of Tertiary investigations in western Saudi Arabia, current work by the U.S. Geological Survey and recommended future studies

    Science.gov (United States)

    Hadley, Donald G.; Schmidt, Dwight Lyman; Coleman, Robert Griffin

    1983-01-01

    In 1936, geologic work related to the Tertiary System in western Saudi Arabia began with a study of the Umm Gerad barite deposit by K. S. Twitchell. In 1944, a study focusing specifically on Tertiary rocks was conducted by Steineke and others near Jiddah. Small-scale mapping of Tertiary sequences began in 1950 in southwestern Saudi Arabia and later in northern 3audi Arabia as part of the Kingdom's early mapping program. These studies were part of a larger program being directed by the Government of Saudi Arabia in connection with mineral resource investigations. In the mid- to late-1960's, the Bureau de Recherches Geologiques et Minieres discovered mineralized Tertiary rocks al Jabal Dhaylan and began a study, which continues to the present, of both the Tertiary rocks and the mineralization. Following a number of early local studies, in 1973 the U.S. Geological Survey began detailed study of the Tertiary layered rocks along the Red Sea coastal plain south of Jiddah. More recently, Riofinex and Seltrust have been exploring for selected commodities in Tertiary sequences of northwestern Saudi Arabia and the Red Sea coastal plain. Results of these studies, including work by the Saudi Arabian Directorate General of Mineral Resources and the Saudi government agency preceding it, are summarized in this report. Characteristics of the Tertiary rocks south of lat 23? N. and the Tertiary mineral deposits of western Saudi Arabia are also summarized. Recommendations are made for future geologic studies and mineral assessment of the Tertiary rocks of western Saudi Arabia.

  19. A model to describe potential effects of chemotherapy on critical radiobiological treatments

    Science.gov (United States)

    Rodríguez-Pérez, D.; Desco, M. M.; Antoranz, J. C.

    2016-08-01

    Although chemo- and radiotherapy can annihilate tumors on their own. they are also used in coadjuvancy: improving local effects of radiotherapy using chemotherapy as a radiosensit.izer. The effects of radiotherapy are well described by current radiobiological models. The goal of this work is to describe a discrete radiotherapy model, that has been previously used describe high radiation dose response as well as unusual radio-responses of some types of tumors (e.g. prostate cancer), to obtain a model of chemo+radiotherapy that can describe how the outcome of their combination is a more efficient removal of the tumor. Our hypothesis is that, although both treatments haven different mechanisms, both affect similar key points of cell metabolism and regulation, that lead to cellular death. Hence, we will consider a discrete model where chemotherapy may affect a fraction of the same targets destroyed by radiotherapy. Although radiotherapy reaches all cells equally, chemotherapy diffuses through a tumor attaining lower concentration in its center and higher in its surface. With our simulations we study the enhanced effect of combined therapy treatment and how it depends on the tissue critical parameters (the parameters of the lion-extensive radiobiological model), the number of “targets” aimed at by chemotherapy, and the concentration and diffusion rate of the drug inside the tumor. The results show that an equivalent, cliemo-radio-dose can be computed that allows the prediction of the lower radiation dose that causes the same effect than a radio-only treatment.

  20. Hospital nurses' work motivation.

    Science.gov (United States)

    Toode, Kristi; Routasalo, Pirkko; Helminen, Mika; Suominen, Tarja

    2015-06-01

    The knowledge surrounding nurses' work motivation is currently insufficient, and previous studies have rarely taken into account the role of many influential background factors. This study investigates the motivation of Estonian nurses in hospitals, and how individual and organisational background factors influence their motivation to work. The study is quantitative and cross-sectional. An electronically self-reported questionnaire was used for data collection. The sample comprised of 201 Registered Nurses working in various hospital settings in Estonia. Data were analysed using descriptive statistics, two-sample Wilcoxon rank-sum (Mann-Whitney) test, Kruskal-Wallis equality-of-populations rank test and Spearman's correlation. Both extrinsic and intrinsic motivations were noted among hospital nurses. Nurses were moderately externally motivated (M = 3.63, SD = 0.89) and intrinsically strongly motivated (M = 4.98, SD = 1.03). A nurses' age and the duration of service were positively correlated with one particular area of extrinsic work motivation, namely introjected regulation (p extrinsic motivation (p = 0.016) and intrinsic work motivation (p = 0.004). The findings expand current knowledge of nurses' work motivation by describing the amount and orientation of work motivation among hospital nurses and highlighting background factors which should be taken into account in order to sustain and increase their intrinsic work motivation. The instrument used in the study can be an effective tool for nurse managers to determine a nurse's reasons to work and to choose a proper motivational strategy. Further research and testing of the instrument in different countries and in different contexts of nursing is however required. © 2014 Nordic College of Caring Science.

  1. Getting Your Teeth into It...: Describing a Language Task in an Italian Bilingual Unit of Work

    Science.gov (United States)

    Ferragina, Anna Maria; Mustica, Giuseppina

    2006-01-01

    International Grammar School was founded twenty years ago on the belief in the benefits of immersion language learning for children. It offers immersion second language learning in German, Italian, French, and Japanese which continues through kindergarten into the high school years. With language as the medium and not the object of learning,…

  2. Wetlands Work

    Science.gov (United States)

    Messina, Linda; Blanchard, Pamela Borne

    2004-01-01

    This article describes how a biology teacher's search for a cross-curricular project in science, math, history, and environmental science, that would help her students connect what they were learning in the classroom to their everyday life, resulted in an ongoing stewardship project. Working together with the Louisiana Sea Grant College Program…

  3. Wetlands Work

    Science.gov (United States)

    Messina, Linda; Blanchard, Pamela Borne

    2004-01-01

    This article describes how a biology teacher's search for a cross-curricular project in science, math, history, and environmental science, that would help her students connect what they were learning in the classroom to their everyday life, resulted in an ongoing stewardship project. Working together with the Louisiana Sea Grant College Program…

  4. [Accomplistments in the Last Year Against the Objectives Laid Out in the Original Proposal; the Current Status of the Research; the Work to go in the Next Year; and Publications

    Science.gov (United States)

    Elliot, James

    2005-01-01

    Below is the annual progress report (through 2005-01-31) on NASA Grant NNG04GF25G. It is organized according to: (I) Accomplishments in the last year against the objectives laid out in the original proposal; (II) The current status of the research; (III) The work to go in the next year; (IV) Publications. Since this program is a continuation of the occultation work supported in a predecessor grant, the "Accomplishments" section lists all the tasks written into the proposal (in June 2003) through the end of the first year of the new grant.

  5. A visual metaphor describing neural dynamics in schizophrenia.

    Directory of Open Access Journals (Sweden)

    Nico J M van Beveren

    Full Text Available BACKGROUND: In many scientific disciplines the use of a metaphor as an heuristic aid is not uncommon. A well known example in somatic medicine is the 'defense army metaphor' used to characterize the immune system. In fact, probably a large part of the everyday work of doctors consists of 'translating' scientific and clinical information (i.e. causes of disease, percentage of success versus risk of side-effects into information tailored to the needs and capacities of the individual patient. The ability to do so in an effective way is at least partly what makes a clinician a good communicator. Schizophrenia is a severe psychiatric disorder which affects approximately 1% of the population. Over the last two decades a large amount of molecular-biological, imaging and genetic data have been accumulated regarding the biological underpinnings of schizophrenia. However, it remains difficult to understand how the characteristic symptoms of schizophrenia such as hallucinations and delusions are related to disturbances on the molecular-biological level. In general, psychiatry seems to lack a conceptual framework with sufficient explanatory power to link the mental- and molecular-biological domains. METHODOLOGY/PRINCIPAL FINDINGS: Here, we present an essay-like study in which we propose to use visualized concepts stemming from the theory on dynamical complex systems as a 'visual metaphor' to bridge the mental- and molecular-biological domains in schizophrenia. We first describe a computer model of neural information processing; we show how the information processing in this model can be visualized, using concepts from the theory on complex systems. We then describe two computer models which have been used to investigate the primary theory on schizophrenia, the neurodevelopmental model, and show how disturbed information processing in these two computer models can be presented in terms of the visual metaphor previously described. Finally, we describe the

  6. Do the current performance-based schemes in Italy really work? "Success fee": a novel measure for cost-containment of drug expenditure.

    Science.gov (United States)

    Navarria, Andrea; Drago, Valentina; Gozzo, Lucia; Longo, Laura; Mansueto, Silvana; Pignataro, Giacomo; Drago, Filippo

    2015-01-01

    Drug costs have risen rapidly in the last decade, driving third-party payers to adopt performance-based agreements that provide either a discount before payment or an ex post reimbursement on the basis of treatments' effectiveness and/or safety issues. This article analyses the strategies currently approved in Italy and proposes a novel model called "success fee" to improve payment-by-result schemes and to guarantee patients rapid access to novel therapies. A review of the existing risk-sharing schemes in Italy has been performed, and data provided by the Italian National report (2012) on drug use have been analyzed to assess the impact on drug expenditure deriving from the application of "traditional" performance-based strategies since their introduction in 2006. Such schemes have poorly contributed to the fulfillment of the purpose in Italy, producing a trifling refund, compared with relevant drugs costs for the National Health System : €121 million out of a total of €3696 million paid. The novel risk-sharing agreement called "success fee" has been adopted for a new high-cost therapy approved for idiopathic pulmonary fibrosis, pirfenidone, and consists of an ex post payment made by the National Health System to the manufacturer for those patients who received a real benefit from treatment. "Success fee" represents an effective strategy to promote value-based pricing, making available to patients a rapid access to innovative and expensive therapies, with an affordable impact on drug expenditure and, simultaneously, ensuring third-party payers to share with manufacturers the risk deriving from uncertain safety and effectiveness. Copyright © 2015. Published by Elsevier Inc.

  7. Current ornithology

    CERN Document Server

    1983-01-01

    The appearance of the first volume of a projected series is the occasion for comment on scope, aims, and genesis of the work. The scope of Current Ornithology is all of the biology of birds. Ornithology, as a whole-organism science, is concerned with birds at every level of bi­ ological organization, from the molecular to the community, at least from the Jurassic to the present time, and over every scholarly discipline in which bird biology is done; to say this is merely to expand a dic­ tionary definition of "ornithology. " The aim of the work, to be realized over several volumes, is to present reviews or position statements con­ cerning the active fields of ornithological research. The reviews will be relatively short, and often will be done from the viewpoint of a readily­ identified group or school. Such a work could have come into being at any time within the past fifty years, but that Current Ornithology appears now is a result of events that are only seven to eight years old. One important event wa...

  8. Would transcranial direct current stimulation (tDCS) enhance the effects of working memory training in older adults with mild neurocognitive disorder due to Alzheimer’s disease: study protocol for a randomized controlled trial

    OpenAIRE

    Cheng, Calvin P. W.; Chan, Sandra S. M.; Arthur D P Mak; Chan, Wai Chi; Cheng, Sheung Tak; Shi, Lin; Wang, Defeng; Lam, Linda Chiu-wa

    2015-01-01

    Background There has been longstanding interesting in cognitive training for older adults with cognitive impairment. In this study, we will investigate the effects of working memory training, and explore augmentation strategies that could possibly consolidate the effects in older adults with mild neurocognitive disorder. Transcranial direct current stimulation (tDCS) has been demonstrated to affect the neuronal excitability and reported to enhance memory performance. As tDCS may also modulate...

  9. Describing linguistic information in a behavioural framework: Possible or not?

    Energy Technology Data Exchange (ETDEWEB)

    De Cooman, G. [Universiteit Gent, Zwijnaarde (Belgium)

    1996-12-31

    The paper discusses important aspects of the representation of linguistic information, using imprecise probabilities with a behavioural interpretation. We define linguistic information as the information conveyed by statements in natural language, but restrict ourselves to simple affirmative statements of the type {open_quote}subject-is-predicate{close_quote}. Taking the behavioural stance, as it is described in detail, we investigate whether it is possible to give a mathematical model for this kind of information. In particular, we evaluate Zadeli`s suggestion that we should use possibility measures to this end. We come to tile conclusion that, generally speaking, possibility measures are possibility models for linguistic information, but that more work should be done in order to evaluate the suggestion that they may be the only ones.

  10. Extended nonlinear feedback model for describing episodes of high inflation

    Science.gov (United States)

    Szybisz, Martín A.; Szybisz, Leszek

    2017-01-01

    An extension of the nonlinear feedback (NLF) formalism to describe regimes of hyper- and high-inflation in economy is proposed in the present work. In the NLF model the consumer price index (CPI) exhibits a finite time singularity of the type 1 /(tc - t) (1 - β) / β, with β > 0, predicting a blow up of the economy at a critical time tc. However, this model fails in determining tc in the case of weak hyperinflation regimes like, e.g., that occurred in Israel. To overcome this trouble, the NLF model is extended by introducing a parameter γ, which multiplies all terms with past growth rate index (GRI). In this novel approach the solution for CPI is also analytic being proportional to the Gaussian hypergeometric function 2F1(1 / β , 1 / β , 1 + 1 / β ; z) , where z is a function of β, γ, and tc. For z → 1 this hypergeometric function diverges leading to a finite time singularity, from which a value of tc can be determined. This singularity is also present in GRI. It is shown that the interplay between parameters β and γ may produce phenomena of multiple equilibria. An analysis of the severe hyperinflation occurred in Hungary proves that the novel model is robust. When this model is used for examining data of Israel a reasonable tc is got. High-inflation regimes in Mexico and Iceland, which exhibit weaker inflations than that of Israel, are also successfully described.

  11. 当前高校学生党建工作存在的问题及对策探析%Current Problems and Countermeasures of College Students' Party Building Work

    Institute of Scientific and Technical Information of China (English)

    石莹; 邓思然

    2012-01-01

    当前,受到经济全球化、政治多极化、社会信息化、价值多元化等诸多因素的深刻影响,高校学生党建工作面临新的挑战,出现了一系列新的问题:学生党员入党动机不纯,功利主义取向明显;党员教育管理工作滞后,工作创新性、针对性、有效性不足;高校学生党建工作队伍整体素质不高,工作水平亟待加强等。为此,对当前高校学生党建工作的现状及存在的问题进行深入的分析与探讨,并提出科学合理的对策建议,是当前高校学生党建工作的当务之急。%At present,by the profound impact of economic globalization and political multi-polarization and social information,the value of diversification of many factors,College Students' Party work is facing new challenges,a series of new problems:student party members impure motives,obvious utilitarian orientation;education of Party members lag,the work of innovative,targeted,the effectiveness of less than;college students' Party work is not high overall quality,level of work should be strengthened.To this end,the current status of college students' Party work and problems of in-depth analysis and discussion,and to make scientific and reasonable suggestions,and current college students the top priority of the work of party building.

  12. Describing a Laser Diode Emulation Tool Using Single Emitter Simulation Results

    Directory of Open Access Journals (Sweden)

    C.K. Amuzuvi

    2013-02-01

    Full Text Available This study describes and explores the use of a laser diode simulation tool at the single emitter level of operation and how they can be degraded. A test of the simulation tool is implemented to complement the by-emitter degradation analysis of high power laser diodes. The simulation tool is called Speclase, designed for the simulation of single emitters. Tests were performed using a 975 nm narrow-angle (<1º tapered laser structure from Alcatel Thales III-V Lab with front and rear facet reflectivities of 3 and 90%, respectively. The tool worked for both the constant current and power modes of operation. Simulation results were obtained for both constant QW trap density, based on the maximum QW temperature and variable QW trap density generation due to local heating. Single emitter degradation results are obtained using the Arrhenius equation to compare the rate of degradation between the constant and variable QW trap densities.

  13. Quality of Working Life of cancer survivors : Development and evaluation of a measurement instrument

    NARCIS (Netherlands)

    de Jong, M.

    2016-01-01

    Cancer survivors can experience difficulties in return-to-work or work continuation. Current outcomes in research describing the working life of cancer survivors offer little insight into cancer survivors’ experiences and perceptions of work, that is to say, the Quality of Working Life (QWL) of canc

  14. DC-Compensated Current Transformer †

    Science.gov (United States)

    Ripka, Pavel; Draxler, Karel; Styblíková, Renata

    2016-01-01

    Instrument current transformers (CTs) measure AC currents. The DC component in the measured current can saturate the transformer and cause gross error. We use fluxgate detection and digital feedback compensation of the DC flux to suppress the overall error to 0.15%. This concept can be used not only for high-end CTs with a nanocrystalline core, but it also works for low-cost CTs with FeSi cores. The method described here allows simultaneous measurements of the DC current component. PMID:26805830

  15. Assessing the state of substitution models describing noncoding RNA evolution.

    Science.gov (United States)

    Allen, James E; Whelan, Simon

    2014-01-01

    Phylogenetic inference is widely used to investigate the relationships between homologous sequences. RNA molecules have played a key role in these studies because they are present throughout life and tend to evolve slowly. Phylogenetic inference has been shown to be dependent on the substitution model used. A wide range of models have been developed to describe RNA evolution, either with 16 states describing all possible canonical base pairs or with 7 states where the 10 mismatched nucleotides are reduced to a single state. Formal model selection has become a standard practice for choosing an inferential model and works well for comparing models of a specific type, such as comparisons within nucleotide models or within amino acid models. Model selection cannot function across different sized state spaces because the likelihoods are conditioned on different data. Here, we introduce statistical state-space projection methods that allow the direct comparison of likelihoods between nucleotide models and 7-state and 16-state RNA models. To demonstrate the general applicability of our new methods, we extract 287 RNA families from genomic alignments and perform model selection. We find that in 281/287 families, RNA models are selected in preference to nucleotide models, with simple 7-state RNA models selected for more conserved families with shorter stems and more complex 16-state RNA models selected for more divergent families with longer stems. Other factors, such as the function of the RNA molecule or the GC-content, have limited impact on model selection. Our models and model selection methods are freely available in the open-source PHASE 3.0 software.

  16. Current measurement apparatus

    Science.gov (United States)

    Umans, Stephen D.

    2008-11-11

    Apparatus and methods are provided for a system for measurement of a current in a conductor such that the conductor current may be momentarily directed to a current measurement element in order to maintain proper current without significantly increasing an amount of power dissipation attributable to the current measurement element or adding resistance to assist in current measurement. The apparatus and methods described herein are useful in superconducting circuits where it is necessary to monitor current carried by the superconducting elements while minimizing the effects of power dissipation attributable to the current measurement element.

  17. Signature Work: A Survey of Current Practices

    Science.gov (United States)

    Peden, Wilson

    2015-01-01

    At the centennial annual meeting of the "Association of American Colleges and Universities" (AAC&U), President Carol Geary Schneider introduced the "LEAP Challenge," the next phase of AAC&U's Liberal Education and America's Promise (LEAP) initiative. The LEAP Challenge calls on all colleges and universities to engage…

  18. While working around security

    DEFF Research Database (Denmark)

    Mathiasen, Niels Raabjerg; Bødker, Susanne; Petersen, Marianne Graves

    This paper describes our work at two levels. First of all the paper discusses how users of IT deal with issues of IT security in their everyday life. Secondly, we discuss how the kind of understanding of IT security that comes out of careful analyses of use confronts the ways in which usable...... IT security is established in the literature. Recent literature has called for better conceptual models as a starting point for improving IT security. In contrast to such models we propose to dress up designers by helping them better understand the work that goes into everyday security. The result...... is a methodological toolbox that helps address and design for usable and useful IT security. We deploy examples of analyses and design, carried out by ourselves and by others to fine-tune our design perspective; in particular we use examples from three current research projects....

  19. Conceptual framework describing a child's total (built, natural ...

    Science.gov (United States)

    The complexity of the components and their interactions that characterize children’s health and well-being are not adequately captured by current public health paradigms. Children are exposed to combinations of chemical and non-chemical stressors from their built, natural, and social environments at each lifestage and throughout their lifecourse. Children’s inherent characteristics (e.g., sex, genetics, pre-existing disease) and their activities and behaviors also influence their exposures to chemical and non-chemical stressors from these environments. We describe a conceptual framework that considers the interrelationships between inherent characteristics, activities and behaviors, and stressors (both chemical and non-chemical) from the built, natural, and social environments in influencing children’s health and well-being throughout their lifecourse. This framework is comprised of several intersecting circles that represent how stressors from the total environment interact with children’s inherent characteristics and their activities and behaviors to influence their health and well-being at each lifestage and throughout their lifecourse. We used this framework to examine the complex interrelationships between chemical and non-chemical stressors for two public health challenges specific to children: childhood obesity and general cognitive ability. One systematic scoping review showed that children’s general cognitive ability was influenced not only by

  20. KTV式的欢唱与失落——当下中国建筑师的执业状态的另一种解说%Laughter and Depression: On the Current Working State of Chinese Architects

    Institute of Scientific and Technical Information of China (English)

    曹晓昕

    2011-01-01

    尽管定义中国建筑师的执业状态非常困难,笔者仍旧通过中国特有的“多、快、好、省”设计现象背后,用KTV式的欢唱作类比,给出当下中国建筑师的执业状态的另一种导读。%Although it's hard to define Chinese architects' working state, this paper still penetrates the phenomenon of pursuing larger quantity, greater speed, better quality and lower cost, which emerge solely in China, by making an analogy between it and karaoke to give the current working state of Chinese architects from another point of view.

  1. The Dilemmas of and Consideration about University Library’s Current Acquisition Work%当前高校图书馆采访工作的困境与思考

    Institute of Scientific and Technical Information of China (English)

    赵敬敬; 李辉

    2014-01-01

    在当前的经济、文化大发展时期,图书馆采访工作面临着外在信息环境的复杂多变与内在需求的不断提升的双重压力。阐述了高校图书馆采访工作面临的困境,提出了高校图书馆摆脱困境的措施。%In the current period of economic and cultural development, library’s acquisition work is facing the double pressure of complex and changeable external information environment and growing internal demands. This paper expounds the dilemmas faced by university library’s acquisition work, and puts forward some measures for university library to get out of the dilemmas.

  2. Does "grief work" work?

    NARCIS (Netherlands)

    Stroebe, M; Stroebe, W

    1991-01-01

    This article challenges the long-standing belief in the necessity of "grief work" for adjustment to bereavement. Evidence is offered from a prospective study of 30 widows and 30 widowers that indicates that grief work is not always as essential for adjustment to bereavement as theorists and clinicia

  3. Considerations about the Current Situation of Public Security Anti-terrorist Intelligence Work%当前形势下公安反恐情报工作的思考

    Institute of Scientific and Technical Information of China (English)

    王龙; 黄力

    2015-01-01

    Nowadays anti-terrorism intelligence has become an important premise and guarantee to carry out effective anti-terrorism work. Through studying the changing trends and characteristics of the terrorist activity in our country under the current situation, and drawing lessons from America's related experiences of anti-terrorist intelligence work, this paper points out that China's public security intelligence department should broaden the intelligence collecting channel, standardize anti-terrorism work stem, eliminate the obstacles to share the anti-terrorism information, and strengthen the training of anti-terrorism personnel to enhance the level of public security anti-terrorist intelligence work.%反恐情报是现今有效开展反恐工作的重要前提和保障. 通过研究当前形势下我国恐怖主义活动的变化趋势和特点,借鉴美国反恐情报工作的相关经验,指出我国公安情报部门应拓宽反恐情报搜集渠道,规范反恐情报工作制度,消除反恐情报共享障碍,加强反恐情报人员培养力度,以此提升公安反恐情报工作水平.

  4. What’s working in working memory training? An educational perspective

    OpenAIRE

    Redick, Thomas S.; Shipstead, Zach; Wiemers, Elizabeth A.; Melby-Lervåg, Monica; Hulme, Charles

    2015-01-01

    Working memory training programs have generated great interest, with claims that the training interventions can have profound beneficial effects on children’s academic and intellectual attainment. We describe the criteria by which to evaluate evidence for or against the benefit of working memory training. Despite the promising results of initial research studies, the current review of all of the available evidence of working memory training efficacy is less optimistic. Our conclusion is that ...

  5. [Evidence of work-related musculo-skeletal disorders of the upper extremities and current methods of risk assessment: can Charlie Chaplin give us any suggestions in "modern times"].

    Science.gov (United States)

    Apostoli, P; Sala, Emma

    2009-01-01

    in some sequences of the film "Modern Times" Chaplin is clearly involved in activities at high risk for work-related musculo-skeletal disorders of the upper extremities (UEWMSDs), but evidence and perception of any complaint are not evident. To evaluate the extent of the biomechanical risk using current risk assessment methods and discuss the possible reasons for lack of complaints. we made an analysis using six of the current methods for ergonomic risk assessment (State of Washington, check list OCRA, HAL by ACGIH, RULA Strain Index, OREGE). All the methods applied demonstrated high-to-very high levels of biomechanical risk for the upper extremities, with evident psychic effects but without apparent musculo-skeletal disorders. The discrepancy between evident psychological disorders ad apparent absence of UEWMSDs are discussed as being due to either: an artistic choice by Charlie Chaplin who focused on the aspects thought to be more immediately and easily comic; the short duration of the physical load exertion; or because of a different perception of muscular work and fatigue that was also typical until the 1970's and 1980's, which also confirmed the principles and practices of our preventive and medical disciplines at that time.

  6. A high current density DC magnetohydrodynamic (MHD) micropump

    NARCIS (Netherlands)

    Homsy, Alexandra; Koster, Sander; Eijkel, Jan C.T.; Berg, van den Albert; Lucklum, F.; Verpoorte, E.; Rooij, de Nico F.

    2005-01-01

    This paper describes the working principle of a DC magnetohydrodynamic (MHD) micropump that can be operated at high DC current densities (J) in 75-µm-deep microfluidic channels without introducing gas bubbles into the pumping channel. The main design feature for current generation is a micromachined

  7. A high current density DC magnetohydrodynamic (MHD) micropump

    NARCIS (Netherlands)

    Homsy, A; Koster, Sander; Eijkel, JCT; van den Berg, A; Lucklum, F; Verpoorte, E; de Rooij, NF

    2005-01-01

    This paper describes the working principle of a DC magnetohydrodynamic (MHD) micropump that can be operated at high DC current densities (J) in 75-mu m-deep microfluidic channels without introducing gas bubbles into the pumping channel. The main design feature for current generation is a micromachin

  8. Injection-limited current in a polymeric heterojunction

    NARCIS (Netherlands)

    Woudenbergh, T. van; Wildeman, J.; Blom, P.W.M.; Mertens, RP; Claeys, CL

    2004-01-01

    This work describes the current over an interface between two different polymeric semiconductors. The interface barrier amounts to 0.7 to 1.0 eV, which is orders of magnitude larger than the thermal energy. It is demonstrated that the current across the interface is injection limited. Furthermore, i

  9. 护士工作家庭增益现状及其影响因素研究%The current status and influencing factors of nurses' Work Family Enrichment

    Institute of Scientific and Technical Information of China (English)

    刘克英; 徐莉; 张婧

    2014-01-01

    Objectives: To investigate the current status of nurses' Work Family Enrichment, to analyze its influencing factors, and to provide references for recognizing the relationship between work and family. Methods: Totally 589 nurses from 8 hospitals in Jingzhou were recruited by convenience sampling method and investigated by Family Work Enrichment Scale. Results: The mean score of nurses' Work-Family Enrichment was (4.03±0.84), and the scores of Work-Family and Family-Work Enrichment were (4.02±0.85) and (4.05±0.74), respectively and the two scores had no statistical signiifcance (P<0.05). Multiple regression analysis showed that job title, educational background, age and night shift were the inlfuencing factors of Work-Family Instrumental Enrichment; position, job title, interpersonal relationship, level of hospital and family monthly income per capita were the inlfuencing factors of Work-Family Psychological Enrichment; age and marriage status were the inlfuencing factor of Family-Work Instrumental Enrichment; and family monthly income per capita and marriage status were the inlfuencing factor of Family-Work Psychological Enrichment. Conclusion: Nurses' Work Family Enrichment was apparent. The job ifeld variable was closely related to Work Family Enrichment.%目的:调查护士工作家庭增益的现状,分析其影响因素,为全面认知工作与家庭的关系提供参考。方法:抽取荆州市8家医院589名护士为研究对象,运用工作家庭增益量表进行调查。结果:护士工作家庭增益总均分为(4.03±0.84)分,其中工作-家庭增益、家庭-工作增益两方面的得分分别为(4.02±0.85)分、(4.05±0.74)分,两者之间差异无统计学意义(P<0.05)。多元回归分析显示,职称、学历、年龄及是否轮值夜班是工作-家庭工具性增益的影响因素;职务、职称、人事关系、家庭人均月收入及医院等级是工作-家庭心理性增益的影响因素;年龄、

  10. Propagation Characteristics and Structural Analysis of Current Seismic Audiovisual Popular Science Works%当前地震声像科普作品的传播特征与结构分析

    Institute of Scientific and Technical Information of China (English)

    崔磊; 刘伟娜

    2014-01-01

    In the paper ,concept of seismic audiovisual popular science works is introduced briefly .Propagation characteristics , themes and topics performance ,track structure ,details and rhythm of the current works are discussed in detail .The works per-formed mainly by sound and image could make are them easier for public to learn the earthquake scientific knowledge ,relevant skills and science idea .%文章简要介绍了地震声像科普作品的概念,对当前地震声像科普作品的传播特征、题材与主题表现、线索结构、细节与节奏等方面进行详细论述,使得地震声像科普作品以声音和图像作为主要表现手段,采取公众更易于理解的方式普及地震科学知识、相关技能和科学理念等。

  11. Describing Earth System Simulations with the Metafor CIM

    Directory of Open Access Journals (Sweden)

    B. N. Lawrence

    2012-06-01

    Full Text Available The Metafor project has developed a Common Information Model (CIM using the ISO1900 series formalism to describe the sorts of numerical experiments carried out by the earth system modelling community, the models they use, and the simulations that result. Here we describe the mechanism by which the CIM was developed, and its key properties. We introduce the conceptual and application versions and the controlled vocabularies developed in the context of supporting the fifth Coupled Model Intercomparison Project (CMIP5. We describe how the CIM has been used in experiments to describe model coupling properties and describe the near term expected evolution of the CIM.

  12. Describing Earth system simulations with the Metafor CIM

    Science.gov (United States)

    Lawrence, B. N.; Balaji, V.; Bentley, P.; Callaghan, S.; DeLuca, C.; Denvil, S.; Devine, G.; Elkington, M.; Ford, R. W.; Guilyardi, E.; Lautenschlager, M.; Morgan, M.; Moine, M.-P.; Murphy, S.; Pascoe, C.; Ramthun, H.; Slavin, P.; Steenman-Clark, L.; Toussaint, F.; Treshansky, A.; Valcke, S.

    2012-11-01

    The Metafor project has developed a common information model (CIM) using the ISO19100 series formalism to describe numerical experiments carried out by the Earth system modelling community, the models they use, and the simulations that result. Here we describe the mechanism by which the CIM was developed, and its key properties. We introduce the conceptual and application versions and the controlled vocabularies developed in the context of supporting the fifth Coupled Model Intercomparison Project (CMIP5). We describe how the CIM has been used in experiments to describe model coupling properties and describe the near term expected evolution of the CIM.

  13. Describing Earth system simulations with the Metafor CIM

    Directory of Open Access Journals (Sweden)

    B. N. Lawrence

    2012-11-01

    Full Text Available The Metafor project has developed a common information model (CIM using the ISO19100 series formalism to describe numerical experiments carried out by the Earth system modelling community, the models they use, and the simulations that result. Here we describe the mechanism by which the CIM was developed, and its key properties. We introduce the conceptual and application versions and the controlled vocabularies developed in the context of supporting the fifth Coupled Model Intercomparison Project (CMIP5. We describe how the CIM has been used in experiments to describe model coupling properties and describe the near term expected evolution of the CIM.

  14. Head-Mounted Eye Tracking: A New Method to Describe Infant Looking

    Science.gov (United States)

    Franchak, John M.; Kretch, Kari S.; Soska, Kasey C.; Adolph, Karen E.

    2011-01-01

    Despite hundreds of studies describing infants' visual exploration of experimental stimuli, researchers know little about where infants look during everyday interactions. The current study describes the first method for studying visual behavior during natural interactions in mobile infants. Six 14-month-old infants wore a head-mounted eye-tracker…

  15. Non-inductive current probe

    DEFF Research Database (Denmark)

    Bak, Christen Kjeldahl

    1977-01-01

    The current probe described is a low-cost, shunt resistor for monitoring current pulses in e.g., pulsed lasers. Rise time is......The current probe described is a low-cost, shunt resistor for monitoring current pulses in e.g., pulsed lasers. Rise time is...

  16. Describing Service-Oriented Architecture by Extended Darwin

    Institute of Scientific and Technical Information of China (English)

    ZHANG Tao; SHEN Mei-e; YING Shi; YE Peng; LIANG Zao-qing

    2005-01-01

    Describing Service-Oriented Architecture (SOA) is critical in the development of Web-based system. In this paper, an approach for describing SOA by extended Darwin is proposed. The requirements for describing SOA, which are different from that of ordinary architecture, are highlighted firstly, and then a solution for extending Darwin is presented. Using the extended Darwin, service components and connectors can be described explicit by the extended construct, as well as precise operational semantics of SOA by the π-calculus. Finally an example of supply-chain management system is given for manifesting the effect of the extended Darwin.

  17. Describing soil surface microrelief by crossover length and fractal dimension

    Directory of Open Access Journals (Sweden)

    E. Vidal Vázquez

    2007-05-01

    Full Text Available Accurate description of soil surface topography is essential because different tillage tools produce different soil surface roughness conditions, which in turn affects many processes across the soil surface boundary. Advantages of fractal analysis in soil microrelief assessment have been recognised but the use of fractal indices in practice remains challenging. There is also little information on how soil surface roughness decays under natural rainfall conditions. The objectives of this work were to investigate the decay of initial surface roughness induced by natural rainfall under different soil tillage systems and to compare the performances of a classical statistical index and fractal microrelief indices. Field experiments were performed on an Oxisol at Campinas, São Paulo State (Brazil. Six tillage treatments, namely, disc harrow, disc plow, chisel plow, disc harrow + disc level, disc plow + disc level and chisel plow + disc level were tested. Measurements were made four times, firstly just after tillage and subsequently with increasing amounts of natural rainfall. Duplicated measurements were taken per treatment and date, yielding a total of 48 experimental surfaces. The sampling scheme was a square grid with 25×25 mm point spacing and the plot size was 1350×1350 mm, so that each data set consisted of 3025 individual elevation points. Statistical and fractal indices were calculated both for oriented and random roughness conditions, i.e. after height reading have been corrected for slope and for slope and tillage tool marks. The main drawback of the standard statistical index random roughness, RR, lies in its no spatial nature. The fractal approach requires two indices, fractal dimension, D, which describes how roughness changes with scale, and crossover length, l, specifying the variance of surface microrelief at a reference scale. Fractal parameters D and l, were estimated by two independent self-affine models

  18. Audio-Described Educational Materials: Ugandan Teachers' Experiences

    Science.gov (United States)

    Wormnaes, Siri; Sellaeg, Nina

    2013-01-01

    This article describes and discusses a qualitative, descriptive, and exploratory study of how 12 visually impaired teachers in Uganda experienced audio-described educational video material for teachers and student teachers. The study is based upon interviews with these teachers and observations while they were using the material either…

  19. Type specimens of Pectinidae (Bivalvia) described by Ignaz von Born

    NARCIS (Netherlands)

    Dijkstra, H.H.

    2009-01-01

    Born described in two publications (1778, 1780) the molluscs in the collection of Empress Maria Theresa (1717-1780), now in the Natural History Museum at Vienna. In this paper the Pectinidae type material is described. Ten new species were introduced of which Argopecten nucleus (Born, 1778) and Minn

  20. Type specimens of Pectinidae (Bivalvia) described by Ignaz von Born

    NARCIS (Netherlands)

    Dijkstra, H.H.

    2009-01-01

    Born described in two publications (1778, 1780) the molluscs in the collection of Empress Maria Theresa (1717-1780), now in the Natural History Museum at Vienna. In this paper the Pectinidae type material is described. Ten new species were introduced of which Argopecten nucleus (Born, 1778) and Minn

  1. Electrifying Current Events.

    Science.gov (United States)

    Smith, Philip

    1980-01-01

    The author describes how he has adapted the television quiz show format of "College Bowl" to current events study for junior high school students. An insert explains use of the same technique with fourth graders. (SJL)

  2. Controlling chaos in dynamical systems described by maps

    Energy Technology Data Exchange (ETDEWEB)

    Crispin, Y.; Marduel, C. [Embry-Riddle Aeronautical Univ., Daytona Beach, FL (United States)

    1994-12-31

    The problem of suppressing chaotic behavior in dynamical systems is treated using a feedback control method with limited control effort. The proposed method is validated on archetypal systems described by maps, i.e. discrete-time difference equations. The method is also applicable to dynamical systems described by flows, i.e. by systems of ordinary differential equations. Results are presented for the one-dimensional logistic map and for a two-dimensional Lotka-Volterra map describing predator-prey population dynamics. It is shown that chaos can be suppressed and the system stabilized about a period-1 fixed point of the maps.

  3. Theoretical determination of cesiated work functions

    Science.gov (United States)

    Szejn, R. M.

    1972-01-01

    A computer program based on the theoretical work of Gyftopoulos, Steiner, and Levine on bimetallic systems and using a modified version of Wilkins' SIMCON subroutine SURFAS was written for the Univac 1108. This program, WFGSL, accepts the operating conditions and the physical parameters pertinent to the substrate and adsorbate, and outputs the field-free work function, electron current (Richardson equation), ion current (Saha equation), and fractional substrate coverage by the adsorbate. A brief description of the theory is presented together with a program description and listing. An application of the program to a bimetallic system of cesium (adsorbate) and rhenium (substrate) is also described.

  4. Storyboard GALILEO CRUISE SCIENCE OPPORTUNITIES describes asteroid encounters

    Science.gov (United States)

    1989-01-01

    Storyboard with mosaicked image of an asteroid and entitled GALILEO CRUISE SCIENCE OPPORTUNITIES describes asteroid objectives. These objectives include: first asteroid encounter; surface geology, composition size, shape, mass; and relation of primitive bodies to meteorites.

  5. US Forest Service Survey parcels described by metes and bounds

    Data.gov (United States)

    US Forest Service, Department of Agriculture — A map service on the www depicting survey parcels described by a metes and bounds description. Examples include: land lots, housing subdivision lots, mineral...

  6. On the Cauchy Problem Describing an Electron-Phonon Interaction

    Institute of Scientific and Technical Information of China (English)

    Jo(a)o-Paulo DIAS; Mário FIGUEIRA; Filipe OLIVEIRA

    2011-01-01

    In this paper, a model is derived to describe a quartic anharmonic interatomic interaction with an external potential involving a pair electron-phonon. The authors study the corresponding Cauchy Problem in the semilinear and quasilinear cases.

  7. Digital data sets describing metropolitan areas in the conterminous US

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set describes metropolitan areas in the conterminous United States, developed from U.S. Bureau of the Census boundaries of Consolidated Metropolitan...

  8. Model checking biological systems described using ambient calculus

    DEFF Research Database (Denmark)

    Mardare, Radu Iulian; Priami, Corrado; Qualia, Paola;

    2005-01-01

    Model checking biological systems described using ambient calculus. In Proc. of the second International Workshop on Computational Methods in Systems Biology (CMSB04), Lecture Notes in Bioinformatics 3082:85-103, Springer, 2005.......Model checking biological systems described using ambient calculus. In Proc. of the second International Workshop on Computational Methods in Systems Biology (CMSB04), Lecture Notes in Bioinformatics 3082:85-103, Springer, 2005....

  9. Describing spatiotemporal couplings in ultrashort pulses using coupling coefficients

    Institute of Scientific and Technical Information of China (English)

    Zeng Shu-Guang; Dan You-Quan; Zhang Bin; Sun Nian-Chun; Sui Zhan

    2011-01-01

    Three coupling coefficients are defined to describe spatiotemporal coupling in ultrashort pulses.With these coupling coefficients,the first-order spatiotemporal couplings of Gaussian pulse and beam are described analytically.Also,the first-order and the second-order spatiotemporal couplings caused by angular dispersion elements are studied using these coupling coefficients.It can be shown that these coupling coefficients are dimensionless and normalized,and readily indicate the severity of spatiotemporal coupling.

  10. Describing the Elephant: Framing a Discussion on Command and Control

    Science.gov (United States)

    2014-08-01

    July–August 2014 Air & Space Power Journal | 17 From the Guest Editor Describing the Elephant Framing a Discussion on Command and Control Col Henry...DATE JUL 2014 2. REPORT TYPE 3. DATES COVERED 00-00-2014 to 00-00-2014 4. TITLE AND SUBTITLE Describing the Elephant: Framing a Discussion on...path ahead for better understanding and op- erational performance in this complex core function. To move down this path requires a common frame of

  11. Spin current

    CERN Document Server

    Valenzuela, Sergio O; Saitoh, Eiji; Kimura, Takashi

    2012-01-01

    In a new branch of physics and technology called spin-electronics or spintronics, the flow of electrical charge (usual current) as well as the flow of electron spin, the so-called 'spin current', are manipulated and controlled together. This book provides an introduction and guide to the new physics and application of spin current.

  12. Merging of plasma currents

    NARCIS (Netherlands)

    Bergmans, J.; Schep, T. J.

    2001-01-01

    The merging process of current filaments in a strongly magnetized plasma is described. The evolution is calculated using a contour dynamics method, which accurately tracks piecewise constant distributions of the conserved quantities. In the interaction of two screened currents, both develop dipolar

  13. The Bransfield Gravity Current

    NARCIS (Netherlands)

    Sangrà, P.; Stegner, A.; Hernández-Arencibia, Mónica; Márrero-Díaz, A.; Salinas, C.; Aguiar-González, B.; Henríquez-Pastene, C.H.; Mouriño-Carballido, B.

    2017-01-01

    Using in situ data and laboratory experiments, we show that the circulation of the Bransfield Current (BC) around the South Shetland Islands (SSI) may be characterized in terms of a propagating buoyant gravity current. First, we describe the SSI hydrography and some drifter trajectories, paying spec

  14. Direct current transformer

    Science.gov (United States)

    Khanna, S. M.; Urban, E. W. (Inventor)

    1979-01-01

    A direct current transformer in which the primary consists of an elongated strip of superconductive material, across the ends of which is direct current potential is described. Parallel and closely spaced to the primary is positioned a transformer secondary consisting of a thin strip of magnetoresistive material.

  15. The Bransfield Gravity Current

    NARCIS (Netherlands)

    Sangrà, P.; Stegner, A.; Hernández-Arencibia, Mónica; Márrero-Díaz, A.; Salinas, C.; Aguiar-González, B.; Henríquez-Pastene, C.H.; Mouriño-Carballido, B.

    2017-01-01

    Using in situ data and laboratory experiments, we show that the circulation of the Bransfield Current (BC) around the South Shetland Islands (SSI) may be characterized in terms of a propagating buoyant gravity current. First, we describe the SSI hydrography and some drifter trajectories, paying

  16. Current situation and influence factors of nursing teachers' working pressure in Xinjiang%新疆护理专职教师工作压力现状及影响因素

    Institute of Scientific and Technical Information of China (English)

    莫合德斯·斯依提; 玛依努尔·买合苏提; 尔西丁

    2012-01-01

    Objective To investigate into the current situation of nursing teachers’ working pressure in Xinjiang and analyze the influence factors,in order to provide basis for countermeasure about teachers' team construction,and valuable suggestions for the sustainable development of nursing school management and talent team.Methods Measuring scale of teachers' working pressure and questionnaire were used to conduct a survey of 256 nursing teachers from 10 nursing schools in 15 regions in Xinjiang,and analyze the influence factors.Results The working pressure score of nursing teachers was ( 2.436 ± 0.576 ),which meant that they felt under heavy pressure.Teachers with different school age,marriage status,part-time job situation and workload bore different levels of working pressure due to social factors.Teachers with different marriage status bore different levels of working pressure due to school management and policies.Teachers with different gender,age,degree,marriage status and workload bore different levels of working pressure due to professional development.Teachers with different gender,school age,and workload bore different levels of working pressure.Teachers with different age,marriage status,and workload bore different levels of working pressure due to interpersonal relationship.Teachers with different gender,age,school age,professional title,marriage status,workload,income and part-time job situation bore different levels of working pressure.Teachers with different gender,professional title,marriage status,workload and curriculum bore different levels of working pressure due to different personal traits.And all the differences were statistically significant ( P < 0.05 ).Conclusions The working pressure of professional nursing teachers is from different sources,in which school management and social factors bring the greatest pressure. Therefore it is necessary to change the prejudice toward nursing education,define the position of nursing education and increase

  17. 儿科护理人员职业生命质量现状及影响因素分析%Current status and influencing factors analysis of the quality of work life among pediatric nurses

    Institute of Scientific and Technical Information of China (English)

    罗小欧; 韩紫敏; 江华; 许茹菊

    2016-01-01

    目的:了解儿科护理人员的职业生命质量现况,探讨分析其影响因素,为提高其职业生命质量,进而提高工作效率和质量提供参考依据。方法采用单纯随机抽样方法抽取浙江省2所儿童医院共282名护理人员为研究对象,采用基本情况调查表、职业生命质量量表(QWL7-32)、职业紧张简化量、心理授权量表进行自填式问卷调查并对影响儿科护理人员职业生命质量的主要因素进行统计分析。结果儿科护理人员职业生命质量总分为(101.39±15.14)分;儿科护理人员职业生命质量较差者占29.8%,一般者占52.8%,较好者占17.4%。多元回归分析结果显示影响儿科护理人员职业生命质量的主要因素有儿科工作年限、月夜班数、任职方式、工作负荷、心理紧张反应、社会支持、工作意义。结论儿科护理人员职业生命质量较差,应针对不同的影响因素采取适当的措施提高儿科护理人员的职业生命质量,是提高护士工作积极性,保证优质护理的有效方式。%Objective The current status of the quality of work life(QWL)among pediatric nurses was investigated and its influencing factors were analyzed,in order to supply references for improving work efficiency and quality.Methods Two hundred and eighty-two pediatric nurses from 2 children′s hospitals in Jiangsu province were selected by the simple random sampling method. Self-administered questionn aires were carried out by using the socio-demographic information questionnaire,the quality of work life questionnaire (QWL7-32),the occupation stress inventory-revised questionnaire and the psychological empowerment scale.The main influencing factors related with the quality of work life among pediatric nurses were statistically analyzed.Results The total QWL score of pediatric nurses was (1 01 .39 ±1 5.1 4)points.The percentage of pediatric nurses with a worse quality

  18. 上海邮政电信移动通信系统在职职工吸烟现状调查%Investigation of current situation of smoking of employees working in Shanghai postal telecom mobile communication system

    Institute of Scientific and Technical Information of China (English)

    姚箴毅; 隆玄; 吴晓丹; 李善群; 陈红

    2012-01-01

    Objective To provide clinical data and basis for formulating tobacco-control measures targetedly by the analysis of smoking behavior and characteristics of employees working in Shanghai postal telecom mobile communication system (SPTMCS).Methods The smoking behavior of 8 389 employees working in SPTMCS was investigated with questionnaire.The indices of smoking pattern included general smoking rate,current smoking rate,heavy smoking rate,quitting smoking rate,relapse rate,initiatively quitting smoking rate,passive smoking rate,passive smoking rate in work places and families.Results The general smoking rate was 35.81%,with males (57.09%) higher than females (0.48%).The rates of current smoking and heavy smoking were 34.47% and 17.02%,respectively.The rates of general smoking,current smoking,and heavy smoking increased gradually with the growth of the age,and were highest in the postal department.The rates of quitting smoking,relapse,passive smoking,passive smoking in work places and families were 7.32%,3.63%,61.82%,44.42%,and 29.96%.Conclusions The general smoking rate of employees working in SPTMCS is still high,with males higher than females and highest in the postal department,and increases gradually with the growth of the age.The quitting smoking rate is not high but with a high relapse rate.So we should speed up the implementation and perfection of the tobacco-control measures in work places,and strengthen the efforts and expand the scope to control tobacco smoking to build a nice smoke-free environment for more people away from tobacco.%目的 通过分析上海邮政电信移动通信系统(上海邮电系统)职工的吸烟行为和特点,为本领域制定针对性的控烟措施提供临床资料和依据.方法 对8389名上海邮政电信移动通信系统在职职工进行吸烟行为问卷调查,对吸烟率、现在吸烟率、重度吸烟率、戒烟率、复吸率、意愿戒烟率、被动吸烟率、工作场所被动吸烟率

  19. Linguistic terms describing different types of armour in Persian manuscripts

    Directory of Open Access Journals (Sweden)

    Moshtagh Khorasani, Manouchehr

    2011-12-01

    Full Text Available The present article investigates different terms describing armour and its diverse typology in Persian martial tradition taken from a selected number of 47 dated Persian manuscripts from the 10th to the 19th centuries C.E. Both human and animal armour used in battlefields are described.

    El presente artículo describe, a partir de 47 manuscritos persas datados entre el siglo X y el siglo XIX d.C., los diversos términos que han designado las armaduras y sus diversas tipologías en la tradición marcial persa, tanto en lo que se refiere a armaduras para hombres como aquellas elaboradas para los animales de batalla.

  20. Electric Current Solves Mazes

    Science.gov (United States)

    Ayrinhac, Simon

    2014-01-01

    We present in this work a demonstration of the maze-solving problem with electricity. Electric current flowing in a maze as a printed circuit produces Joule heating and the right way is instantaneously revealed with infrared thermal imaging. The basic properties of electric current can be discussed in this context, with this challenging question:…

  1. Application of fault current limiters

    Energy Technology Data Exchange (ETDEWEB)

    Neumann, A.

    2007-11-30

    This report presents the results of a study commissioned by the Department for Business, Enterprise and Industry (BERR; formerly the Department of Trade and Industry) into the application of fault current limiters in the UK. The study reviewed the current state of fault current limiter (FCL) technology and regulatory position in relation to all types of current limiters. It identified significant research and development work with respect to medium voltage FCLs and a move to high voltage. Appropriate FCL technologies being developed include: solid state breakers; superconducting FCLs (including superconducting transformers); magnetic FCLs; and active network controllers. Commercialisation of these products depends on successful field tests and experience, plus material development in the case of high temperature superconducting FCL technologies. The report describes FCL techniques, the current state of FCL technologies, practical applications and future outlook for FCL technologies, distribution fault level analysis and an outline methodology for assessing the materiality of the fault level problem. A roadmap is presented that provides an 'action agenda' to advance the fault level issues associated with low carbon networks.

  2. Algorithm describing pressure distribution of non-contact TNT explosion

    Directory of Open Access Journals (Sweden)

    Radosław Kiciński

    2014-12-01

    Full Text Available [b]Abstract[/b]. The aim of this study is to develop a computational algorithm, describing the shock wave pressure distribution in the space induced by non-contact TNT explosion. The procedure describes pressure distribution on a damp surface of the hull. Simulations have been carried out using Abaqus/CAE. The study also shows the pressure waveform descriptions provided by various authors and presents them in charts. The formulated conclusions convince efficiency of the algorithm application.[b]Keywords:[/b] Underwater explosion, shock wave, CAE, TNT, Kobben class submarine

  3. Dynamic modelling of pectin extraction describing yield and functional characteristics

    DEFF Research Database (Denmark)

    Andersen, Nina Marianne; Cognet, T.; Santacoloma, P. A.

    2017-01-01

    A dynamic model of pectin extraction is proposed that describes pectin yield, degree of esterification and intrinsic viscosity. The dynamic model is one dimensional in the peel geometry and includes mass transport of pectin by diffusion and reaction kinetics of hydrolysis, degradation and de-esterification....... The model takes into account the effects of the process conditions such as temperature and acid concentration on extraction kinetics. It is shown that the model describes pectin bulk solution concentration, degree of esterification and intrinsic viscosity in pilot scale extractions from lime peel...

  4. Describing baseball pitch movement with right-hand rules.

    Science.gov (United States)

    Bahill, A Terry; Baldwin, David G

    2007-07-01

    The right-hand rules show the direction of the spin-induced deflection of baseball pitches: thus, they explain the movement of the fastball, curveball, slider and screwball. The direction of deflection is described by a pair of right-hand rules commonly used in science and engineering. Our new model for the magnitude of the lateral spin-induced deflection of the ball considers the orientation of the axis of rotation of the ball relative to the direction in which the ball is moving. This paper also describes how models based on somatic metaphors might provide variability in a pitcher's repertoire.

  5. A Quark Transport Theory to describe Nucleon--Nucleon Collisions

    CERN Document Server

    Kalmbach, U; Biro, T S; Mosel, U

    1993-01-01

    On the basis of the Friedberg-Lee model we formulate a semiclassical transport theory to describe the phase-space evolution of nucleon-nucleon collisions on the quark level. The time evolution is given by a Vlasov-equation for the quark phase-space distribution and a Klein-Gordon equation for the mean-field describing the nucleon as a soliton bag. The Vlasov equation is solved numerically using an extended testparticle method. We test the confinement mechanism and mean-field effects in 1+1 dimensional simulations.

  6. Newly Described Tumor Entities in Sinonasal Tract Pathology.

    Science.gov (United States)

    Bishop, Justin A

    2016-03-01

    Surgical pathology of the sinonasal tract (nasal cavity and paranasal sinuses) is extremely challenging due in part to the tremendous diversity of tumor types that may arise in this region. Compounding the difficulty, a number of new sinonasal tumor entities have been recently described, and pathologists may not yet be familiar with these neoplasms. This manuscript will review the clinicopathologic features of some of the newly described sinonasal tumor types: NUT midline carcinoma, HPV-related carcinoma with adenoid cystic-like features, SMARCB1 (INI-1) deficient sinonasal carcinoma, biphenotypic sinonasal sarcoma, and renal cell-like adenocarcinoma.

  7. Teachers Describe Epistemologies of Science Instruction through Q Methodology

    Science.gov (United States)

    Barnes, Caitlin; Angle, Julie; Montgomery, Diane

    2015-01-01

    Creating scientifically literate students is a common goal among educational stakeholders. An understanding of nature of science is an important component of scientific literacy in K-12 science education. Q methodology was used to investigate the opinions of preservice and in-service teachers on how they intend to teach or currently teach science.…

  8. Adolescents with lesbian mothers describe their own lives

    NARCIS (Netherlands)

    Gartrell, N.; Bos, H.M.W.; Peyser, H.; Deck, A.; Rodas, C.

    2012-01-01

    Empirical research on the everyday life experiences of adolescents reared by lesbian mothers is limited. The current study gathered self-report descriptive data from 78 adolescents enrolled in the largest, longest-running, prospective longitudinal study of planned lesbian families, with a 93% retent

  9. Describing dengue epidemics: Insights from simple mechanistic models

    Science.gov (United States)

    Aguiar, Maíra; Stollenwerk, Nico; Kooi, Bob W.

    2012-09-01

    We present a set of nested models to be applied to dengue fever epidemiology. We perform a qualitative study in order to show how much complexity we really need to add into epidemiological models to be able to describe the fluctuations observed in empirical dengue hemorrhagic fever incidence data offering a promising perspective on inference of parameter values from dengue case notifications.

  10. Superintendents Describe Their Leadership Styles: Implications for Practice

    Science.gov (United States)

    Bird, James J.; Wang, Chuang

    2013-01-01

    Superintendents from eight southeastern United States school districts self-described their leadership styles across the choices of autocratic, laissez-faire, democratic, situational, servant, or transformational. When faced with this array of choices, the superintendents chose with arguable equitableness, indicating that successful leaders can…

  11. Describing Elementary Certification Methods across the Elementary Music Career Cycle

    Science.gov (United States)

    Svec, Christina L.

    2017-01-01

    The purpose of the study was to describe elementary music method choice and certification method choice overall and across the elementary music career cycle. Participants (N = 254) were categorized as Level I or Elementary Division in a southwestern music education association database. The questionnaire included 25 four-point Likert-type items…

  12. Icosahedral symmetry described by an incommensurately modulated crystal structure model

    DEFF Research Database (Denmark)

    Wolny, Janusz; Lebech, Bente

    1986-01-01

    A crystal structure model of an incommensurately modulated structure is presented. Although six different reciprocal vectors are used to describe the model, all calculations are done in three dimensions making calculation of the real-space structure trivial. Using this model, it is shown that both...

  13. Describing, Instantiating and Evaluating a Reference Architecture : A Case Study

    NARCIS (Netherlands)

    Avgeriou, Paris

    2003-01-01

    The result of a domain maturing is the emergence of reference architectures that offer numerous advantages to software architects and other stakeholders. However there is no straightforward way to describe a reference architecture and in sequence to design instances for specific systems, while at th

  14. The Tortricidae described by J. C. Fabricius (Lepidoptera)

    DEFF Research Database (Denmark)

    Baixeras, Joaquin; Karsholt, Ole

    2011-01-01

    The identity and nomenclature of the 88 species of Tortricidae (Lepidoptera) described by J. C. Fabricius are reviewed. Type material deposited in the Natural History Museum Denmark is illustrated. Lectotypes for Tinea compositella (Fabricius, 1775), Pyralis rivellana (Fabricius, 1775) and P...

  15. Digital data set describing surficial geology in the conterminous US

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This digital data set describes surficial geology of the conterminous United States. The data set was generated from a U.S. Geological Survey 1:7,500,000-scale map...

  16. Describing the Corneal Shape after Wavefront-Optimized Photorefractive Keratectomy

    NARCIS (Netherlands)

    de Jong, Tim; Wijdh, Robert H. J.; Koopmans, Steven A.; Jansonius, Nomdo M.

    2014-01-01

    PURPOSE: To develop a procedure for describing wavefront-optimized photorefractive keratectomy (PRK) corneas and to characterize PRK-induced changes in shape. METHODS: We analyzed preoperative and postoperative corneal elevation data of 41 eyes of 41 patients (mean [±SD] age, 38 [±11] years) who und

  17. An Evolving Framework for Describing Student Engagement in Classroom Activities

    Science.gov (United States)

    Azevedo, Flavio S.; diSessa, Andrea A.; Sherin, Bruce L.

    2012-01-01

    Student engagement in classroom activities is usually described as a function of factors such as human needs, affect, intention, motivation, interests, identity, and others. We take a different approach and develop a framework that models classroom engagement as a function of students' "conceptual competence" in the "specific content" (e.g., the…

  18. Avicenna, the first to describe thyroid-related orbitopathy.

    Science.gov (United States)

    Nabipour, Iraj; Burger, Albert; Moharreri, Muhammad-Reza; Azizi, Fereidoun

    2009-01-01

    The history of the association of goiter and orbital disease is discussed. Although Graves and Basedow are credited with the first descriptions of this association, it was described many years earlier between AD 1000 and 1110 by two Persian physicians and philosophers, Avicenna and Al-Jurjani.

  19. Interpersonal Problems of People Who Describe Themselves as Lonely.

    Science.gov (United States)

    French, Rita de Sales; Horowitz, Leonard M.

    1979-01-01

    The complaint "I am lonely" summarizes specific interpersonal difficulties in socializing. The UCLA Loneliness Scale identifies lonely and not-lonely students who described their major interpersonal problems by performing a Q-sort with a standardized set of problems. Results show that lonely people consistently report problems of…

  20. Collective learning in schools described: building collective learning capacity

    NARCIS (Netherlands)

    Verbiest, Eric; Teurlings, C.; Ansems, E.; Bakx, A.; Grootswagers, A.; Heijmen-Versteegen,; Jongen,; Uphoff,

    2005-01-01

    Processes of collective learning are expected to increase the professionalism of teachers and school leaders. Little is known about the processes of collective learning which take place in schools and about the way in which those processes may be improved. This paper describes a research into proces

  1. A Framework for Describing Variations in State Early Intervention Systems.

    Science.gov (United States)

    Spiker, Donna; Hebbeler, Kathleen; Wagner, Mary; Cameto, Renee; McKenna, Patti

    2000-01-01

    Information about the early intervention service systems in 20 states was gathered and organized into dimensions of a framework for describing early intervention systems at the state and local levels. Results indicate considerable variation exists on eligibility criteria, agencies involved in early intervention, and models of intake and service…

  2. Automatic system for ionization chamber current measurements.

    Science.gov (United States)

    Brancaccio, Franco; Dias, Mauro S; Koskinas, Marina F

    2004-12-01

    The present work describes an automatic system developed for current integration measurements at the Laboratório de Metrologia Nuclear of Instituto de Pesquisas Energéticas e Nucleares. This system includes software (graphic user interface and control) and a module connected to a microcomputer, by means of a commercial data acquisition card. Measurements were performed in order to check the performance and for validating the proposed design.

  3. BOOK REVIEW: The Current Comparator

    Science.gov (United States)

    Petersons, Oskars

    1989-01-01

    This 120-page book is a concise, yet comprehensive, clearly-written and well-illustrated monograph that covers the subject matter from basic principles through design, construction and calibration details to the principal applications. The book will be useful, as a primer, to the uninitiated and, as a reference book to the practitioner involved with transformer-type ratio devices. The length of the book and the style of presentation will not overburden any informed reader. The described techniques and the cited references are primarily from the work at the National Research Council, Canada (NRC). Any omissions, however, are not serious with respect to coverage of the subject matter, since most of the development work has been done at NRC. The role of transformers and transformer-like devices for establishing accurate voltage and current ratios has been recognized for over half a century. Transformer techniques were much explored and developed in the fifties and sixties for accuracy levels suitable for standards laboratories. Three-winding voltage transformers were developed for scaling of impedances in connection with the calculable Thompson Lampard capacitor; three-winding current transformers or current comparators were initially explored for the calibration of current transformers and later for specialized impedance measurements. Extensive development of the current comparator and its applications has been and is still being conducted at the NRC by a team that was started and, until his retirement, led by N L Kusters. The team is now led by W J M Moore. He and P N Miljanic, the authors of this book, have had the principal roles in the development of the current comparator. It is fortunate for the field of metrology that considerabe resources and a talented group of researchers were available to do this development along with mechanisms that were available to transfer this technology to a private sector instrument manufacturer and, thus, disseminate it world wide

  4. Single pulse responses in cultured neuronal networks to describe connectivity

    NARCIS (Netherlands)

    Feber, le Joost; Corner, Michael

    2011-01-01

    Synaptic connections between neurons play a crucial role in cognitive processes like learning and memory. In recent work we developed a method, using conditional firing probability (CFP analysis), to estimate functional connectivity in terms of strength and latency, and here we further explored on t

  5. A visual metaphor describing neural dynamics in Schizophrenia

    NARCIS (Netherlands)

    N.J.M. van Beveren (Nico); L. de Haan (Lieuwe)

    2008-01-01

    textabstractBackground: In many scientific disciplines the use of a metaphor as an heuristic aid is not uncommon. A well known example in somatic medicine is the 'defense army metaphor' used to characterize the immune system. In fact, probably a large part of the everyday work of doctors consists of

  6. Theorizing and Describing Preservice Teachers' Images of Families and Schooling

    Science.gov (United States)

    Graue, Elizabeth

    2005-01-01

    This article examines how prospective teachers just beginning a professional education program think about working with parents. Through interviews with students in an elementary teacher education program, I explore how biography shapes dispositions toward families by setting expectations for the roles and the activities of participants. Merging…

  7. A visual metaphor describing neural dynamics in Schizophrenia

    NARCIS (Netherlands)

    N.J.M. van Beveren (Nico); L. de Haan (Lieuwe)

    2008-01-01

    textabstractBackground: In many scientific disciplines the use of a metaphor as an heuristic aid is not uncommon. A well known example in somatic medicine is the 'defense army metaphor' used to characterize the immune system. In fact, probably a large part of the everyday work of doctors consists of

  8. Novel 3-Phase Inductive Fault Current Limiter

    Science.gov (United States)

    Kosa, Janos

    The paper describes the inductive three-phase fault current limiter. In this work I examine the novel arrangements of the perfect closed superconducting loop made of HTS wire. I applied one iron core with 3 limbs and special loops for uniform temperature of the superconducting wire. In this work I present the results of my experiments with this device. I present the static and dynamic measured results of this solution. It has got several advantages e. g. fast switching and less fault power for high-power electric machines. The advantage of the equipment is that in the case of single-phase short circuit the current will decrease in all the three phases. This can be an appropriate solution for high power machines. For example, in the case of high-power electric motor if there is a single-phase breaking or a single phase short circuit, we can decrease the current in the three phases.

  9. New models for describing outliers in meta-analysis.

    Science.gov (United States)

    Baker, Rose; Jackson, Dan

    2016-09-01

    An unobserved random effect is often used to describe the between-study variation that is apparent in meta-analysis datasets. A normally distributed random effect is conventionally used for this purpose. When outliers or other unusual estimates are included in the analysis, the use of alternative random effect distributions has previously been proposed. Instead of adopting the usual hierarchical approach to modelling between-study variation, and so directly modelling the study specific true underling effects, we propose two new marginal distributions for modelling heterogeneous datasets. These two distributions are suggested because numerical integration is not needed to evaluate the likelihood. This makes the computation required when fitting our models much more robust. The properties of the new distributions are described, and the methodology is exemplified by fitting models to four datasets. © 2015 The Authors. Research Synthesis Methods published by John Wiley & Sons, Ltd. © 2015 The Authors. Research Synthesis Methods published by John Wiley & Sons, Ltd.

  10. Galactic Rotation Described with Bulge+Disk Gravitational Models

    CERN Document Server

    Gallo, C F

    2008-01-01

    Observations reveal that mature spiral galaxies consist of stars, gases and plasma approximately distributed in a thin disk of circular shape, usually with a central bulge. The rotation velocities quickly increase from the galactic center and then achieve a constant velocity from the core to the periphery. The basic dynamic behavior of a mature spiral galaxy, such as the Milky Way, is well described by simple models balancing Newtonian gravitational forces against the centrifugal forces associated with a rotating thin axisymmetric disk. In this research, we investigate the effects of adding central bulges to thin disk gravitational models. Even with the addition of substantial central bulges, all the critical essential features of our thin disk gravitational models are preserved. (1) Balancing Newtonian gravitational and centrifugal forces at every point within the disk yields computed radial mass distributions that describe the measured rotation velocity profiles of mature spiral galaxies successfully. (2) T...

  11. Oculoectodermal syndrome: twentieth described case with new manifestations*

    Science.gov (United States)

    Figueiras, Daniela de Almeida; Leal, Deborah Maria de Castro Barbosa; Kozmhinsky, Valter; Querino, Marina Coutinho Domingues; Regueira, Marina Genesia da Silva; Studart, Maria Gabriela de Morais

    2016-01-01

    Oculoectodermal syndrome is a rare disease characterized by the association of aplasia cutis congenita, epibulbar dermoids, and other abnormalities. This report describes the twentieth case of the disease. We report a 4-year-old female child who presented with the classical features of the syndrome: aplasia cutis congenita and epibulbar dermoids. Our case expands the clinical spectrum of the disease to include: diffuse hyperpigmentation (some following the Blaschko´s lines); hypopigmented skin areas on the trunk; arachnoid cyst on the right fronto-parietal border; rounded left side of the hippocampus; and dermoid cyst underlying the bulb-medullary transition. Our patient also reported infantile hemangioma on the right wrist and verrucous hemangioma on the left leg, the latter not previously described in the literature.

  12. A six-parameter space to describe galaxy diversification

    CERN Document Server

    Fraix-Burnet, Didier; Chattopadhyay, Asis Kumar; Davoust, Emmanuel; Thuillard, Marc

    2012-01-01

    Galaxy diversification proceeds by transforming events like accretion, interaction or mergers. These explain the formation and evolution of galaxies that can now be described with many observables. Multivariate analyses are the obvious tools to tackle the datasets and understand the differences between different kinds of objects. However, depending on the method used, redundancies, incompatibilities or subjective choices of the parameters can void the usefulness of such analyses. The behaviour of the available parameters should be analysed before an objective reduction of dimensionality and subsequent clustering analyses can be undertaken, especially in an evolutionary context. We study a sample of 424 early-type galaxies described by 25 parameters, ten of which are Lick indices, to identify the most structuring parameters and determine an evolutionary classification of these objects. Four independent statistical methods are used to investigate the discriminant properties of the observables and the partitioni...

  13. Statistical models describing the energy signature of buildings

    DEFF Research Database (Denmark)

    Bacher, Peder; Madsen, Henrik; Thavlov, Anders

    2010-01-01

    Approximately one third of the primary energy production in Denmark is used for heating in buildings. Therefore efforts to accurately describe and improve energy performance of the building mass are very important. For this purpose statistical models describing the energy signature of a building, i.......e. the heat dynamics of the building, have been developed. The models can be used to obtain rather detailed knowledge of the energy performance of the building and to optimize the control of the energy consumption for heating, which will be vital in conditions with increasing fluctuation of the energy supply...... or varying energy prices. The paper will give an overview of statistical methods and applied models based on experiments carried out in FlexHouse, which is an experimental building in SYSLAB, Risø DTU. The models are of different complexity and can provide estimates of physical quantities such as UA...

  14. Double sigmoidal models describing the growth of coffee berries

    Directory of Open Access Journals (Sweden)

    Tales Jesus Fernandes

    Full Text Available ABSTRACT: This study aimed to verify if the growth pattern of coffee berries, considering fresh mass accumulation over time, is double sigmoid and to select the most suitable nonlinear model to describe such behavior. Data used consisted of fourteen longitudinal observations of average fresh mass of coffee berries obtained in an experiment with the cultivar Obatã IAC 1669-20. The fits provided by the Logistic and Gompertz models were compared in their single and double versions. Parameters were estimated using the least squares method using the Gauss-Newton algorithm implemented in the nls function of the R software. It can be concluded that the growth pattern of the coffee fruit, in fresh mass accumulation, is double sigmoid. The double Gompertz and double Logistic models were adequate to describe such a growth curve, with a superiority of the double Logistic model.

  15. Which number system is "best" for describing empirical reality?

    CERN Document Server

    Visser, Matt

    2013-01-01

    Eugene Wigner's much discussed notion of the "unreasonable effectiveness of mathematics" in describing the physics of empirical reality is simultaneously both trivial and profound. After all, the relevant mathematics was, (in the first instance), originally developed in order to be useful in describing empirical reality. On the other hand, certain aspects of the mathematical superstructure have now taken on a life of their own, with at least some features of the mathematical superstructure greatly exceeding anything that can be directly probed or verified, or even justified, by empirical experiment. Specifically, I wish to raise the possibility that the real number system, (with its nevertheless pragmatically very useful tools of real analysis, and mathematically rigorous notions of differentiation and integration), may nevertheless constitute a "wrong turn" when it comes to modelling empirical reality. Without making any definitive recommendation, I shall discuss several alternatives.

  16. Curie law for systems described by kappa distributions

    Science.gov (United States)

    Livadiotis, George

    2016-01-01

    We derive the magnetization of a system, Pierre Curie's law, for paramagnetic particles out of thermal equilibrium described by kappa distributions. The analysis uses the theory and formulation of the kappa distributions that describe particle systems with a non-zero potential energy. Among other results, emphasis is placed on the effect of kappa distribution on the phenomenon of having strong magnetization at high temperatures. At thermal equilibrium, high temperature leads to weak magnetization. Out of thermal equilibrium, however, strong magnetization at high temperatures is rather possible, if the paramagnetic particle systems reside far from thermal equilibrium, i.e., at small values of kappa. The application of the theory to the space plasma at the outer boundaries of our heliosphere, the inner heliosheath, leads to an estimation of the ion magnetic moment for this space plasma, that is, μ ≈ 138+/-7 \\text{eV/nT} .

  17. A geostatistical approach for describing spatial pattern in stream networks

    Science.gov (United States)

    Ganio, L.M.; Torgersen, C.E.; Gresswell, R.E.

    2005-01-01

    The shape and configuration of branched networks influence ecological patterns and processes. Recent investigations of network influences in riverine ecology stress the need to quantify spatial structure not only in a two-dimensional plane, but also in networks. An initial step in understanding data from stream networks is discerning non-random patterns along the network. On the other hand, data collected in the network may be spatially autocorrelated and thus not suitable for traditional statistical analyses. Here we provide a method that uses commercially available software to construct an empirical variogram to describe spatial pattern in the relative abundance of coastal cutthroat trout in headwater stream networks. We describe the mathematical and practical considerations involved in calculating a variogram using a non-Euclidean distance metric to incorporate the network pathway structure in the analysis of spatial variability, and use a non-parametric technique to ascertain if the pattern in the empirical variogram is non-random.

  18. Describing spatial pattern in stream networks: A practical approach

    Science.gov (United States)

    Ganio, L.M.; Torgersen, C.E.; Gresswell, R.E.

    2005-01-01

    The shape and configuration of branched networks influence ecological patterns and processes. Recent investigations of network influences in riverine ecology stress the need to quantify spatial structure not only in a two-dimensional plane, but also in networks. An initial step in understanding data from stream networks is discerning non-random patterns along the network. On the other hand, data collected in the network may be spatially autocorrelated and thus not suitable for traditional statistical analyses. Here we provide a method that uses commercially available software to construct an empirical variogram to describe spatial pattern in the relative abundance of coastal cutthroat trout in headwater stream networks. We describe the mathematical and practical considerations involved in calculating a variogram using a non-Euclidean distance metric to incorporate the network pathway structure in the analysis of spatial variability, and use a non-parametric technique to ascertain if the pattern in the empirical variogram is non-random.

  19. The first fossil cephalopod statoliths to be described from Europe

    OpenAIRE

    Clarke, M. R.; MADDOCK, LINDA; Steurbaut, E.

    1980-01-01

    Statoliths of cephalopods are small, hard calcareous stones which lie within the cartilaginous skulls of octopods, sepioids and teuthoids1. Fossil statoliths, clearly belonging to genera which are alive today, have previously been described from 11 Cenozoic deposits spanning from the Eocene to the Pleistocene in North America2–5. Such statoliths are of particular interest because they provide a means of studying the evolution of living cephalopod groups which have no calcareous shells, includ...

  20. New model describing the dynamical behaviour of penetration rates

    Science.gov (United States)

    Tashiro, Tohru; Minagawa, Hiroe; Chiba, Michiko

    2013-02-01

    We propose a hierarchical logistic equation as a model to describe the dynamical behaviour of a penetration rate of a prevalent stuff. In this model, a memory, how many people who already possess it a person who does not process it yet met, is considered, which does not exist in the logistic model. As an application, we apply this model to iPod sales data, and find that this model can approximate the data much better than the logistic equation.

  1. The scentscape: An integrative framework describing scents in servicescapes

    OpenAIRE

    Girard, Marc; Girard, Anna; Suppin, Anna-Caroline; Bartsch, Silke

    2016-01-01

    The systematic use of ambient scents is a trend in service companies that is accompanied by increasing research attention. However, we lack a theoretical framework that ad-dresses ambient scents' specific role in physical surroundings of services. Thus, this article develops the 'scentscape', a model that describes the process of olfactory stimulation and its impacts on customers and employees in service environments. The paper extends Bitner's servicescape model (1992) and combines it with G...

  2. Case study of the community nurses' current work status in Beijing%北京市社区护士工作现状与问题的案例分析

    Institute of Scientific and Technical Information of China (English)

    万巧琴; 尚少梅; 侯淑肖; 刘利群; 周薇; 陈梅; 邓述华

    2011-01-01

    Objective: To understand the current work status of community nurses, to explore community nurses' main problems in implementing "six in one "community health service function, and provide reference for community nursing development. Methods: A community health service center in Beijing was chosen as the case. Structure observation and in-depth interview were adopted. Results: The results of observation showed that basic treatment-related direct nursing work within community organization ranked first with the average time of 76.4 minutes per person per day. The second was public health service-related indirect nursing work within community organization with the average time of 65.4 minutes per person per day. We found out 5 first-level themes and 10 second-level themes based on interview results. Conclusion: At present, the public health service-related nursing work that community nurses participated was mainly indirect care. To enhance the healthy and continuous development of community nursing, it is necessary to increase community nursing human resources and pay more attention to chronic disease management.%目的:了解目前社区护士的工作现状,探讨社区护士在履行“六位一体”社区卫生服务功能中存在的主要问题,为今后更好地开展社区护理工作提供依据.方法:采用案例分析法,将北京市某社区卫生服务中心作为案例,通过结构式观察法和深入访谈法了解该中心社区护士的工作现状与问题.结果:社区护士工作内容排在第一位的是机构内的基本医疗方而的直接护理工作(平均时间为76.4分钟/人·天),其次是机构内的公共卫生方面的间接护理工作(65.4分钟/人·天);根据方谈结果,共归纳一级主题5个,二级主题10个.结论:月前社区护士参与公共卫生服务工作以间接护理为主,为了促进社区护理的健康、持续发展,需要进一步调整社区护士编制,使之与工作负荷相匹配,加强慢性病

  3. Structure of electric double layers in capacitive systems and to what extent (classical) density functional theory describes it

    Science.gov (United States)

    Härtel, Andreas

    2017-10-01

    Ongoing scientific interest is aimed at the properties and structure of electric double layers (EDLs), which are crucial for capacitive energy storage, water treatment, and energy harvesting technologies like supercapacitors, desalination devices, blue engines, and thermocapacitive heat-to-current converters. A promising tool to describe their physics on a microscopic level is (classical) density functional theory (DFT), which can be applied in order to analyze pair correlations and charge ordering in the primitive model of charged hard spheres. This simple model captures the main properties of ionic liquids and solutions and it predicts many of the phenomena that occur in EDLs. The latter often lead to anomalous response in the differential capacitance of EDLs. This work constructively reviews the powerful theoretical framework of DFT and its recent developments regarding the description of EDLs. It explains to what extent current approaches in DFT describe structural ordering and in-plane transitions in EDLs, which occur when the corresponding electrodes are charged. Further, the review briefly summarizes the history of modeling EDLs, presents applications, and points out limitations and strengths in present theoretical approaches. It concludes that DFT as a sophisticated microscopic theory for ionic systems is expecting a challenging but promising future in both fundamental research and applications in supercapacitive technologies.

  4. On the problems of describing joint axis alignment.

    Science.gov (United States)

    Ball, Kevin A; Greiner, Thomas M

    2008-01-01

    Each three-dimensional joint possesses at least one potentially oblique axis of rotation. Several systems are used to express joint axis alignment. One system, designated the plane projection (PP) method, describes angles based on orthogonal projections onto two, of the three, anatomical planes. Alternatively, a joint axis may be described in two different ways using two sequential Cardan angle rotations. These expression systems all lay claim to similar descriptive labels, such as deviation and elevation. Difficulties arise as researchers use these various methods to compare their own data to the results of others. A joint axis alignment, described as 27 degrees deviation and 41 degrees elevation in PP, differs by as much as 6 degrees when expressed as Cardan angles. Differences among expression systems increase as the joint axis alignment becomes more oblique -- eventually differing by as much as 75 degrees . This paper explores implications for this lack of congruence among the joint axis expression systems. Effective steps in dealing with these issues begin with recognizing the existence and extent of the problem. The paper provides a common set of algorithms to illustrate and alleviate the possible problems associated with the exchange of joint axis alignment data.

  5. On Differential Equations Describing 3-Dimensional Hyperbolic Spaces

    Institute of Scientific and Technical Information of China (English)

    WU Jun-Yi; DING Qing; Keti Tenenblat

    2006-01-01

    In this paper, we introduce the notion of a (2+1)-dimensional differential equation describing threedimensional hyperbolic spaces (3-h.s.). The (2+1)-dimensional coupled nonlinear Schrodinger equation and its sister equation, the (2+1)-dimensional coupled derivative nonlinear Schrodinger equation, are shown to describe 3-h.s. The (2+1)-dimensional generalized HF model: St = (1/2i [S, Sy] + 2iσS)x, σx = 1-4itr(SSxSy), in which S ∈ GLC(2)/GLC(1)×GLC(1),provides another example of (2+1)-dimensional differential equations describing 3-h.s. As a direct consequence, the geometric construction of an infinite number of conservation laws of such equations is illustrated. Furthermore we display a new infinite number of conservation laws of the (2+1)-dimensional nonlinear Schrodinger equation and the (2+1)odimensional derivative nonlinear Schrodinger equation by a geometric way.

  6. Pixels Intensity Evolution to Describe the Plastic Films Deformation

    Directory of Open Access Journals (Sweden)

    Juan C. Briñez-De León

    2013-11-01

    Full Text Available This work proposes an approach for mechanical behavior description in the plastic film deformation using techniques for the images analysis, which are based on the intensities evolution of fixed pixels applied to an images sequence acquired through polarizing optical assembly implemented around the platform of the plastic film deformation. The pixels intensities evolution graphs, and mechanical behavior graphic of the deformation has dynamic behaviors zones which could be associated together.

  7. Research on Social Work Practice in Egypt and the Arab World

    Science.gov (United States)

    Megahead, Hamido A.

    2017-01-01

    This article aims at introducing the research on social work practice in Egypt and the Arab World as a thematic topic. It has started with the essence of the current Arab World and its definition. Social work practice and models of social work intervention in this specific region have been described in terms of its specific and topographic nature.…

  8. HERMES: A Model to Describe Deformation, Burning, Explosion, and Detonation

    Energy Technology Data Exchange (ETDEWEB)

    Reaugh, J E

    2011-11-22

    HERMES (High Explosive Response to MEchanical Stimulus) was developed to fill the need for a model to describe an explosive response of the type described as BVR (Burn to Violent Response) or HEVR (High Explosive Violent Response). Characteristically this response leaves a substantial amount of explosive unconsumed, the time to reaction is long, and the peak pressure developed is low. In contrast, detonations characteristically consume all explosive present, the time to reaction is short, and peak pressures are high. However, most of the previous models to describe explosive response were models for detonation. The earliest models to describe the response of explosives to mechanical stimulus in computer simulations were applied to intentional detonation (performance) of nearly ideal explosives. In this case, an ideal explosive is one with a vanishingly small reaction zone. A detonation is supersonic with respect to the undetonated explosive (reactant). The reactant cannot respond to the pressure of the detonation before the detonation front arrives, so the precise compressibility of the reactant does not matter. Further, the mesh sizes that were practical for the computer resources then available were large with respect to the reaction zone. As a result, methods then used to model detonations, known as {beta}-burn or program burn, were not intended to resolve the structure of the reaction zone. Instead, these methods spread the detonation front over a few finite-difference zones, in the same spirit that artificial viscosity is used to spread the shock front in inert materials over a few finite-difference zones. These methods are still widely used when the structure of the reaction zone and the build-up to detonation are unimportant. Later detonation models resolved the reaction zone. These models were applied both to performance, particularly as it is affected by the size of the charge, and to situations in which the stimulus was less than that needed for reliable

  9. HERMES: A Model to Describe Deformation, Burning, Explosion, and Detonation

    Energy Technology Data Exchange (ETDEWEB)

    Reaugh, J E

    2011-11-22

    HERMES (High Explosive Response to MEchanical Stimulus) was developed to fill the need for a model to describe an explosive response of the type described as BVR (Burn to Violent Response) or HEVR (High Explosive Violent Response). Characteristically this response leaves a substantial amount of explosive unconsumed, the time to reaction is long, and the peak pressure developed is low. In contrast, detonations characteristically consume all explosive present, the time to reaction is short, and peak pressures are high. However, most of the previous models to describe explosive response were models for detonation. The earliest models to describe the response of explosives to mechanical stimulus in computer simulations were applied to intentional detonation (performance) of nearly ideal explosives. In this case, an ideal explosive is one with a vanishingly small reaction zone. A detonation is supersonic with respect to the undetonated explosive (reactant). The reactant cannot respond to the pressure of the detonation before the detonation front arrives, so the precise compressibility of the reactant does not matter. Further, the mesh sizes that were practical for the computer resources then available were large with respect to the reaction zone. As a result, methods then used to model detonations, known as {beta}-burn or program burn, were not intended to resolve the structure of the reaction zone. Instead, these methods spread the detonation front over a few finite-difference zones, in the same spirit that artificial viscosity is used to spread the shock front in inert materials over a few finite-difference zones. These methods are still widely used when the structure of the reaction zone and the build-up to detonation are unimportant. Later detonation models resolved the reaction zone. These models were applied both to performance, particularly as it is affected by the size of the charge, and to situations in which the stimulus was less than that needed for reliable

  10. THE QUESTIONNAIRE ON SOCIOCULTURAL CONTEXT IN EATING DISORDERS DEVELOPED BY MACIEJ PILECKI AND BARBARA JÓZEFIK - A SUMMARY OF THE CURRENT STAGE OF WORK ON THE RESEARCH INSTRUMENT

    Directory of Open Access Journals (Sweden)

    Pilecki, Maciej

    2014-06-01

    Full Text Available Aim. To create the most coherent version of the scales of The Questionnaire on Sociocultural Context developed by Maciej Pilecki and Barbara Józefik and to assess the relationship that they have with disordered eating and eating disorders. Method. Firstly, a factor analysis on selected items of the research instrument based on a population of 614 girls attending Krakow schools was conducted. Then, in the same group, an analysis of the relationship between the obtained factors and the results of the Polish version of the The Eating Attitude Test (EAT26 was performed. Subsequently, a comparison of the obtained factors was conducted between 47 teenage female patients diagnosed with restrictive anorexia nervosa, 16 diagnosed with binge/purge anorexia, 34 with a diagnosis of bulimia and 76 schoolgirls with a low risk of presenting eating disorders (EAT26≤19 points. Results. Coherent 7-scaled factorial structure of the tool including 32 out of 62 of the items of the questionnaire was obtained, relating to areas such as: the importance of thinness and media pressure on it, pressure for thinness, family success, a negative assessment of family context, the importance of control, the cultural importance of the problem, peer group pressure. The created scales retain 50.4% common factor variance and the achieved Cronbach's alpha coefficients for the scales were as follows respectively: 0.747; 0.850; 0.737; 0.617; 0.593; 0.668; 0.544. Obtained scales significantly differentiated the girls in the context of the prevalence of disturbed eating and eating disorders, particularly the girls with bulimic symptoms. Conclusions. The results of the current stage of work on the in strument are promising. However, the questionnaire does require further transformations.

  11. A proposal to describe a phenomenon of expanding language

    Science.gov (United States)

    Swietorzecka, Kordula

    Changes of knowledge, convictions or beliefs are subjects of interest in frame of so called epistemic logic. There are various proposed descriptions of a process (or its results) in which so a called agent may invent certain changes in a set of sentences that he had already chosen as a point of his knowledge, convictions or beliefs (and this is also considered in case of many agents). In the presented paper we are interested in the changeability of an agent's language which is by its own independent from already mentioned changes. Modern epistemic formalizations assume that the agent uses a fixed (and so we could say: static) language in which he expresses his various opinions which may change. Our interest is to simulate a situation when a language is extended by adding to it new expressions which were not known by the agent so he couldn't even consider them as subjects of his opinions. Actually such a phenomenon happens both in natural and scientific languages. Let us mention a fact of expanding languages in process of learning or in result of getting of new data about some described domain. We propose a simple idealization of extending sentential language used by one agent. Actually the language is treated as a family of so called n-languages which get some epistemic interpretation. Proposed semantics enables us to distinguish between two different types of changes - these which occur because of changing agent's convictions about logical values of some n-sentences - we describe them using one place operator C to be read it changes that - and changes that consist in increasing the level of n-language by adding to it new expressions. However the second type of change - symbolized by variable G - may be also considered independently of the first one. The logical frame of our considerations comes from and it was originally used to describe Aristotelian theory of substantial changes. This time we apply the mentioned logic in epistemology.

  12. Two heuristic approaches to describe periodicities in genomic microarrays

    Directory of Open Access Journals (Sweden)

    Jörg Aßmus

    2009-09-01

    Full Text Available In the first part we discuss the filtering of panels of time series based on singular value decomposition. The discussion is based on an approach where this filtering is used to normalize microarray data. We point out effects on the periodicity and phases for time series panels. In the second part we investigate time dependent periodic panels with different phases. We align the time series in the panel and discuss the periodogram of the aligned time series with the purpose of describing the periodic structure of the panel. The method is quite powerful assuming known phases in the model, but it deteriorates rapidly for noisy data.  

  13. Analysis of a mathematical model describing necrotic tumor growth

    CERN Document Server

    Escher, Joachim; Matioc, Bogdan-Vasile

    2010-01-01

    In this paper we study a model describing the growth of necrotic tumors in different regimes of vascularisation. The tumor consists of a necrotic core of death cells and a surrounding nonnecrotic shell. The corresponding mathematical formulation is a moving boundary problem where both boundaries delimiting the nonnecrotic shell are allowed to evolve in time.We determine all radially symmetric stationary solutions of the problem and reduce the moving boundary problem into a nonlinear evolution. Parabolic theory provides us the perfect context in order to show local well-posed of the problem for small initial data.

  14. Can all neurobiological processes be described by classical physics?

    CERN Document Server

    Lisewski, A M

    1999-01-01

    We discuss results recently given in an article by M. Tegmark (quant-ph/9907009) where he argues that neurons can be described appropriately by pure classical physics. This letter is dedicated to the question if this is really the case when the role of dissipation and noise -- the two concurrent phenomena present in these biological structures -- is taken into account. We argue that dissipation and noise might well be of quantum origin and give also a possible reason why neural dynamics is not classical.

  15. [Health consequences of smoking electronic cigarettes are poorly described].

    Science.gov (United States)

    Tøttenborg, Sandra Søgaard; Holm, Astrid Ledgaard; Wibholm, Niels Christoffer; Lange, Peter

    2014-09-01

    Despite increasing popularity, health consequences of vaping (smoking electronic cigarettes, e-cigarettes) are poorly described. Few studies suggest that vaping has less deleterious effects on lung function than smoking conventional cigarettes. One large study found that e-cigarettes were as efficient as nicotine patches in smoking cessation. The long-term consequences of vaping are however unknown and while some experts are open towards e-cigarettes as a safer way of satisfying nicotine addiction, others worry that vaping in addition to presenting a health hazard may lead to an increased number of smokers of conventional cigarettes.

  16. Quadrupolar gravitational fields described by the $q-$metric

    CERN Document Server

    Quevedo, Hernando; Yerlan, Aimuratov

    2013-01-01

    We investigate the Zipoy-Voorhees metric ($q-$metric) as the simplest static, axially symmetric solution of Einstein's vacuum field equations that possesses as independent parameters the mass and the quadrupole moment. In accordance with the black holes uniqueness theorems, the presence of the quadrupole completely changes the geometric properties of the corresponding spacetime that turns out to contain naked singularities for all possible values of the quadrupole parameter. The naked singularities, however, can be covered by interior solutions that correspond to perfect fluid sources with no specific equations of state. We conclude that the $q-$metric can be used to describe the entire spacetime generated by static deformed compact objects.

  17. Spectral Gaps of Dirac Operators Describing Graphene Quantum Dots

    Science.gov (United States)

    Benguria, Rafael D.; Fournais, Søren; Stockmeyer, Edgardo; Van Den Bosch, Hanne

    2017-06-01

    The two-dimensional Dirac operator describes low-energy excitations in graphene. Different choices for the boundary conditions give rise to qualitative differences in the spectrum of the resulting operator. For a family of boundary conditions, we find a lower bound to the spectral gap around zero, proportional to |Ω|-1/2, where {Ω } \\subset R2 is the bounded region where the Dirac operator acts. This family contains the so-called infinite mass and armchair cases used in the physics literature for the description of graphene quantum dots.

  18. Failure of random matrix theory to correctly describe quantum dynamics.

    Science.gov (United States)

    Kottos, T; Cohen, D

    2001-12-01

    Consider a classically chaotic system that is described by a Hamiltonian H(0). At t=0 the Hamiltonian undergoes a sudden change (H)0-->H. We consider the quantum-mechanical spreading of the evolving energy distribution, and argue that it cannot be analyzed using a conventional random-matrix theory (RMT) approach. Conventional RMT can be trusted only to the extent that it gives trivial results that are implied by first-order perturbation theory. Nonperturbative effects are sensitive to the underlying classical dynamics, and therefore the Planck's over 2 pi-->0 behavior for effective RMT models is strikingly different from the correct semiclassical limit.

  19. Can CA describe collective effects of polluting agents?

    Science.gov (United States)

    Troisi, A.

    2015-03-01

    Pollution represents one of the most relevant issues of our time. Several studies are on stage but, generally, they do not consider competitive effects, paying attention only to specific agents and their impact. In this paper, it is suggested a different scheme. At first, it is proposed a formal model of competitive noxious effects. Second, by generalizing a previous algorithm capable of describing urban growth, it is developed a cellular automata (CA) model that provides the effective impact of a variety of pollutants. The final achievement is a simulation tool that can model pollution combined effects and their dynamical evolution in relation to anthropized environments.

  20. Theory of control systems described by differential inclusions

    CERN Document Server

    Han, Zhengzhi; Huang, Jun

    2016-01-01

    This book provides a brief introduction to the theory of finite dimensional differential inclusions, and deals in depth with control of three kinds of differential inclusion systems. The authors introduce the algebraic decomposition of convex processes, the stabilization of polytopic systems, and observations of Luré systems. They also introduce the elemental theory of finite dimensional differential inclusions, and the properties and designs of the control systems described by differential inclusions. Addressing the material with clarity and simplicity, the book includes recent research achievements and spans all concepts, concluding with a critical mathematical framework. This book is intended for researchers, teachers and postgraduate students in the area of automatic control engineering.

  1. Describing fuzzy sets using a new concept:fuzzify functor

    Institute of Scientific and Technical Information of China (English)

    魏克新; 王兆霞; 王权

    2009-01-01

    This paper proposed a fuzzify functor as an extension of the concept of fuzzy sets.The fuzzify functor and the first-order operated fuzzy set are defined.From the theory analysis,it can be observed that when the fuzzify functor acts on a simple crisp set,we get the first order fuzzy set or type-1 fuzzy set.By operating the fuzzify functor on fuzzy sets,we get the higher order fuzzy sets or higher type fuzzy sets and their membership functions.Using the fuzzify functor we can exactly describe the type-1 fuzz...

  2. Using UMLS metathesaurus concepts to describe medical images: dermatology vocabulary.

    Science.gov (United States)

    Woods, James W; Sneiderman, Charles A; Hameed, Kamran; Ackerman, Michael J; Hatton, Charlie

    2006-01-01

    Web servers at the National Library of Medicine (NLM) displayed images of ten skin lesions to practicing dermatologists and provided an online form for capturing text they used to describe the pictures. The terms were submitted to the UMLS Metathesaurus (Meta). Concepts retrieved, their semantic types, definitions and synonyms, were returned to each subject in a second web-based form. Subjects rated the concepts against their own descriptive terms. They submitted 825 terms, 346 of which were unique and 300 mapped to UMLS concepts. The dermatologists rated 295 concepts as 'Exact Match' and they accomplished both tasks in about 30 min.

  3. Current limiters

    Energy Technology Data Exchange (ETDEWEB)

    Loescher, D.H. [Sandia National Labs., Albuquerque, NM (United States). Systems Surety Assessment Dept.; Noren, K. [Univ. of Idaho, Moscow, ID (United States). Dept. of Electrical Engineering

    1996-09-01

    The current that flows between the electrical test equipment and the nuclear explosive must be limited to safe levels during electrical tests conducted on nuclear explosives at the DOE Pantex facility. The safest way to limit the current is to use batteries that can provide only acceptably low current into a short circuit; unfortunately this is not always possible. When it is not possible, current limiters, along with other design features, are used to limit the current. Three types of current limiters, the fuse blower, the resistor limiter, and the MOSFET-pass-transistor limiters, are used extensively in Pantex test equipment. Detailed failure mode and effects analyses were conducted on these limiters. Two other types of limiters were also analyzed. It was found that there is no best type of limiter that should be used in all applications. The fuse blower has advantages when many circuits must be monitored, a low insertion voltage drop is important, and size and weight must be kept low. However, this limiter has many failure modes that can lead to the loss of over current protection. The resistor limiter is simple and inexpensive, but is normally usable only on circuits for which the nominal current is less than a few tens of milliamperes. The MOSFET limiter can be used on high current circuits, but it has a number of single point failure modes that can lead to a loss of protective action. Because bad component placement or poor wire routing can defeat any limiter, placement and routing must be designed carefully and documented thoroughly.

  4. Thermal emission in fatigue described by power laws

    Directory of Open Access Journals (Sweden)

    Gallinatti A.E.

    2010-06-01

    Full Text Available In the present work, a theoretical model proposed by the literature and focused on the relationship between microplasticizations thermal behaviour and fatigue scatter is analysed and applied to fatigue test results of standard and notched steel specimens. The same experimental data are subjected to the TCM (Two Curves Method thermographic elaboration technique, in order to quickly evaluate fatigue limit values. TCM method has been modified, aiming at interpolating thermal data referred to the region of loads upper than fatigue limit with a non linear regression law having the same mathematical structure of the theoretical model equations (power laws.

  5. 南昌市办公场所吸烟与二手烟暴露现况调查%Survey on the current status of smoking and Second-Hand smoking exposure in Work places in Nanchang

    Institute of Scientific and Technical Information of China (English)

    吴金星; 陈海婴; 范义兵; 杨树

    2012-01-01

    OBJECTIVE To explore the current status of smoking and Second-Hand smoking exposure in work places in Nanchang City, provide evidence for policy-making, and to promote enacting ' Non-smoking workplace' legislation. METHODS Field observation, questionnaire survey and the TSI Side Pak was used to measure indoor air PM2.5 level in workplaces. RESULTS Field observation was conducted among 29 work places, of which 2 were smoke-free places regulated by the ordinance, 16 had established smoking areas and No-smoking areas; In the smoke-free places, the percentage of smoking phenomenon ratio in (10, 50) was 50%. Among the survey workers, the general passive smoking rate was 51.9%; 60.7% of smokers smoked in the no-smoking areas, and the percentage of worker's discourage rate was only 5.9%. The average indoor air PM2.5 level was 49.7 μg/m3 in work places with complete smoke free policies, 67.6μg/m3 in work places with partial smoke free policies, 66.0μg/m3 in work places with no rules or restrictions on smoking. CONCLUSION The smoking phenomenon in the work places in Nanchang City was seriously, and the rate of Second-Hand smoking exposure to high. Anti-smoking measures was imperfect, and the charged with smoke was not sufficient. Need to enhance smoker's awareness of the harm of smoking and Second-Hand smoking, and enter corresponding "Non-smoking workplace" local code and legislation.%目的 了解南昌市办公场所吸烟和二手烟暴露情况,为政府决策提供依据,促进“无烟工作场所”立法.方法 采用现场观察,问卷拦截调查和对工作场所空气中PM2.5浓度进行监测等方法,分析南昌市办公场所吸烟和二手烟暴露情况.结果 现场观察了29家办公场所,禁烟场所2家,16家场所划分了吸烟区和非吸烟区;全面禁烟场所吸烟现象比例在(10,50]的分布为50%.被调查工作人员中,有51.9%在工作单位受到二手烟的侵害;有60.7%的吸烟者在工作场所的非吸烟区内吸

  6. In their own words: describing Canadian physician leadership.

    Science.gov (United States)

    Snell, Anita J; Dickson, Graham; Wirtzfeld, Debrah; Van Aerde, John

    2016-07-04

    Purpose This is the first study to compile statistical data to describe the functions and responsibilities of physicians in formal and informal leadership roles in the Canadian health system. This mixed-methods research study offers baseline data relative to this purpose, and also describes physician leaders' views on fundamental aspects of their leadership responsibility. Design/methodology/approach A survey with both quantitative and qualitative fields yielded 689 valid responses from physician leaders. Data from the survey were utilized in the development of a semi-structured interview guide; 15 physician leaders were interviewed. Findings A profile of Canadian physician leadership has been compiled, including demographics; an outline of roles, responsibilities, time commitments and related compensation; and personal factors that support, engage and deter physicians when considering taking on leadership roles. The role of health-care organizations in encouraging and supporting physician leadership is explicated. Practical implications The baseline data on Canadian physician leaders create the opportunity to determine potential steps for improving the state of physician leadership in Canada; and health-care organizations are provided with a wealth of information on how to encourage and support physician leaders. Using the data as a benchmark, comparisons can also be made with physician leadership as practiced in other nations. Originality/value There are no other research studies available that provide the depth and breadth of detail on Canadian physician leadership, and the embedded recommendations to health-care organizations are informed by this in-depth knowledge.

  7. Asphere, O asphere, how shall we describe thee?

    Science.gov (United States)

    Forbes, G. W.; Brophy, C. P.

    2008-09-01

    Two key criteria govern the characterization of nominal shapes for aspheric optical surfaces. An efficient representation describes the spectrum of relevant shapes to the required accuracy by using the fewest decimal digits in the associated coefficients. Also, a representation is more effective if it can, in some way, facilitate other processes - such as optical design, tolerancing, or direct human interpretation. With the development of better tools for their design, metrology, and fabrication, aspheric optics are becoming ever more pervasive. As part of this trend, aspheric departures of up to a thousand microns or more must be characterized at almost nanometre precision. For all but the simplest of shapes, this is not as easy as it might sound. Efficiency is therefore increasingly important. Further, metrology tools continue to be one of the weaker links in the cost-effective production of aspheric optics. Interferometry particularly struggles to deal with steep slopes in aspheric departure. Such observations motivated the ideas described in what follows for modifying the conventional description of rotationally symmetric aspheres to use orthogonal bases that boost efficiency. The new representations can facilitate surface tolerancing as well as the design of aspheres with cost-effective metrology options. These ideas enable the description of aspheric shapes in terms of decompositions that not only deliver improved efficiency and effectiveness, but that are also shown to admit direct interpretations. While it's neither poetry nor a cure-all, an old blight can be relieved.

  8. Evaluation of Geographic Indices Describing Health Care Utilization.

    Science.gov (United States)

    Kim, Agnus M; Park, Jong Heon; Kang, Sungchan; Kim, Yoon

    2017-01-01

    The accurate measurement of geographic patterns of health care utilization is a prerequisite for the study of geographic variations in health care utilization. While several measures have been developed to measure how accurately geographic units reflect the health care utilization patterns of residents, they have been only applied to hospitalization and need further evaluation. This study aimed to evaluate geographic indices describing health care utilization. We measured the utilization rate and four health care utilization indices (localization index, outflow index, inflow index, and net patient flow) for eight major procedures (coronary artery bypass graft surgery, percutaneous transluminal coronary angioplasty, surgery after hip fracture, knee replacement surgery, caesarean sections, hysterectomy, computed tomography scans, and magnetic resonance imaging scans) according to three levels of geographic units in Korea. Data were obtained from the National Health Insurance database in Korea. We evaluated the associations among the health care utilization indices and the utilization rates. In higher-level geographic units, the localization index tended to be high, while the inflow index and outflow index were lower. The indices showed different patterns depending on the procedure. A strong negative correlation between the localization index and the outflow index was observed for all procedures. Net patient flow showed a moderate positive correlation with the localization index and the inflow index. Health care utilization indices can be used as a proxy to describe the utilization pattern of a procedure in a geographic unit.

  9. First order reversal curves diagrams for describing ferroelectric switching characteristics

    Directory of Open Access Journals (Sweden)

    Liliana Mitoseriu

    2009-06-01

    Full Text Available First Order Reversal Curves (FORC are polarization-field dependences described between saturation field Esat and a variable reversal field Er∈(-Esat, Esat. The FORC diagrams were proposed to describe some characteristics of the switching process in ferroelectrics. The approach is related to the Preisach model which considers the distribution of the elementary switchable units over their coercive and bias fields. The influence of the anisotropic porosity in Pb(Zr,TiO3 bulk ceramics on the FORC distributions demonstrated the existence of a positive/negative bias as a result of the confinement induced by anisotropy. The reducing of grain size in Ba(Zr,TiO3 ceramics causes an increase of the ratio of the reversible/irreversible components of the polarization on the FORC distribution indicating the tendency of system towards the superparaelectric state. The FORC method demonstrates to provide a kind of ‘fingerprinting’ of various types of switching characteristics in ferroic systems.

  10. Conjugated Molecules Described by a One-Dimensional Dirac Equation.

    Science.gov (United States)

    Ernzerhof, Matthias; Goyer, Francois

    2010-06-08

    Starting from the Hückel Hamiltonian of conjugated hydrocarbon chains (ethylene, allyl radical, butadiene, pentadienyl radical, hexatriene, etc.), we perform a simple unitary transformation and obtain a Dirac matrix Hamiltonian. Thus already small molecules are described exactly in terms of a discrete Dirac equation, the continuum limit of which yields a one-dimensional Dirac Hamiltonian. Augmenting this Hamiltonian with specially adapted boundary conditions, we find that all the orbitals of the unsaturated hydrocarbon chains are reproduced by the continuous Dirac equation. However, only orbital energies close to the highest occupied molecular orbital/lowest unoccupied molecular orbital energy are accurately predicted by the Dirac equation. Since it is known that a continuous Dirac equation describes the electronic structure of graphene around the Fermi energy, our findings answer the question to what extent this peculiar electronic structure is already developed in small molecules containing a delocalized π-electron system. We illustrate how the electronic structure of small polyenes carries over to a certain class of rectangular graphene sheets and eventually to graphene itself. Thus the peculiar electronic structure of graphene extends to a large degree to the smallest unsaturated molecule (ethylene).

  11. Performance Evaluation of Models that Describe the Soil Water Retention Curve between Saturation and Oven Dryness

    Science.gov (United States)

    The objective of this work was to evaluate eight closed-form unimodal analytical expressions that describe the soil-water retention curve over the complete range of soil water contents. To meet this objective, the eight models were compared in terms of their accuracy (root mean square error, RMSE), ...

  12. Using a Model to Describe Students' Inductive Reasoning in Problem Solving

    Science.gov (United States)

    Canadas, Maria C.; Castro, Encarnacion; Castro, Enrique

    2009-01-01

    Introduction: We present some aspects of a wider investigation (Canadas, 2007), whose main objective is to describe and characterize inductive reasoning used by Spanish students in years 9 and 10 when they work on problems that involved linear and quadratic sequences. Method: We produced a test composed of six problems with different…

  13. Combining the CIDOC CRM and MPEG-7 to Describe Multimedia in Museums.

    Science.gov (United States)

    Hunter, Jane

    This paper describes a proposal for an interoperable metadata model, based on international standards, that has been designed to enable the description, exchange and sharing of multimedia resources both within and between cultural institutions. Domain-specific ontologies have been developed by two different ISO Working Groups to standardize the…

  14. Status of the names of some hydroid species (Cnidaria, Hydrozoa), described from the Atlantic coast of Patagonia.

    Science.gov (United States)

    Miranda, Thaís P; Cunha, Amanda F; Marques, Antonio C

    2016-09-29

    Thirty new species of benthic leptothecate hydroids were described and named from Patagonia in a 1991 PhD dissertation by Mohamed El Beshbeeshy. Although constituting nomina nuda under provisions of the International Code of Zoological Nomenclature (ICZN), the names of some species were used in several scientific publications between 1991 and 2011. In 2011, the dissertation of El Beshbeeshy was published in accordance with Article 8 of the ICZN. Several species-group names appearing in that work nevertheless fail to fully comply with certain articles of the code. The goal of this contribution is to review the nomenclatural availability of the names of those 30 new taxa, and to clearly establish the current status of El Beshbeeshy's material. Two of them were made available in 1999 as part of studies other than those of El Beshbeeshy, and correct authorship and date is here noted. Twenty-one of the nomina nuda were made available in a work published by El Beshbeeshy in 2011, although some constitute junior synonyms. Six of the new species-group names appearing in both the 1991 and 2011 works, established following a literature review of Patagonian species, were proposed without re-description, or designation of name-bearing types, or locations of such types. Most of them do not meet criteria of availability and remain nomina nuda. The status of each is discussed to avoid additional nomenclatural errors and continued taxonomic confusion.

  15. Describing student performance: a comparison among clinical preceptors across cultural contexts.

    Science.gov (United States)

    Wilbur, Kerry; Hassaballa, Noha; Mahmood, Omaima S; Black, Emily K

    2017-04-01

    Health professional student evaluation during experiential training is notably subjective and assessor judgements may be affected by socio-cultural influences. This study sought to explore how clinical preceptors in pharmacy conceptualise varying levels of student performance and to identify any contextual differences that may exist across different countries. The qualitative research design employed semi-structured interviews. A sample of 20 clinical preceptors for post-baccalaureate Doctor of Pharmacy programmes in Canada and the Middle East gave personal accounts of how students they had supervised fell below, met or exceeded their expectations. Discussions were analysed following constructivist grounded theory principles. Seven major themes encompassing how clinical pharmacy preceptors categorise levels of student performance and behaviour were identified: knowledge; team interaction; motivation; skills; patient care; communication, and professionalism. Expectations were outlined using both positive and negative descriptions. Pharmacists typically described supervisory experiences representing a series of these categories, but arrived at concluding judgements in a holistic fashion: if valued traits of motivation and positive attitude were present, overall favourable impressions of a student could be maintained despite observations of a few deficiencies. Some prioritised dimensions could not be mapped to defined existing educational outcomes. There was no difference in thresholds for how student performance was distinguished by participants in the two regions. The present research findings are congruent with current literature related to the constructs used by clinical supervisors in health professional student workplace-based assessment and provide additional insight into cross-national perspectives in pharmacy. As previously determined in social work and medicine, further study of how evaluation instruments and associated processes can integrate these

  16. Working It Out

    Science.gov (United States)

    ... Navigation Bar Home Current Issue Past Issues Working It Out Past Issues / Summer 2007 Table of Contents ... of this technique. Especially when combined with medications, it can help relieve depression. Research shows that it ...

  17. Strength in Numbers: Describing the Flooded Area of Isolated Wetlands

    Science.gov (United States)

    Lee, Terrie M.; Haag, Kim H.

    2006-01-01

    Thousands of isolated, freshwater wetlands are scattered across the karst1 landscape of central Florida. Most are small (less than 15 acres), shallow, marsh and cypress wetlands that flood and dry seasonally. Wetland health is threatened when wetland flooding patterns are altered either by human activities, such as land-use change and ground-water pumping, or by changes in climate. Yet the small sizes and vast numbers of isolated wetlands in Florida challenge our efforts to characterize them collectively as a statewide water resource. In the northern Tampa Bay area of west-central Florida alone, water levels are measured monthly in more than 400 wetlands by the Southwest Florida Water Management Distirct (SWFWMD). Many wetlands have over a decade of measurements. The usefulness of long-term monitoring of wetland water levels would greatly increase if it described not just the depth of water at a point in the wetland, but also the amount of the total wetland area that was flooded. Water levels can be used to estimate the flooded area of a wetland if the elevation contours of the wetland bottom are determined by bathymetric mapping. Despite the recognized importance of the flooded area to wetland vegetation, bathymetric maps are not available to describe the flooded areas of even a representative number of Florida's isolated wetlands. Information on the bathymetry of isolated wetlands is rare because it is labor intensive to collect the land-surface elevation data needed to create the maps. Five marshes and five cypress wetlands were studied by the U.S. Geological Survey (USGS) during 2000 to 2004 as part of a large interdisciplinary study of isolated wetlands in central Florida. The wetlands are located either in municipal well fields or on publicly owned lands (fig. 1). The 10 wetlands share similar geology and climate, but differ in their ground-water settings. All have historical water-level data and multiple vegetation surveys. A comprehensive report by Haag and

  18. Benchmarking of numerical models describing the dispersion of radionuclides in the Arctic Seas

    Energy Technology Data Exchange (ETDEWEB)

    Scott, E.M.; Harms, I. [Department of Statistics, University of Glasgow, Glasgow (United Kingdom); Gurbutt, P. [MAFF, Fisheries Laboratory, Lowestoft (United Kingdom); Heling, R. [KEMA, Arnhem (Netherlands); Nielsen, S.P. [Risoe National Laboratory, Roskilde (Denmark); Osvath, I. [IAEA Marine Environment Laboratory, Monaco (France); Preller, R. [Naval Research Laboratory, Stennis Space Center (United States); Sazykina, T. [SPA Typhoon, Obninsk (Russian Federation); Wada, A. [Department of Civil Engineering, College of Industrial Technology, Nihon University, Nihon (Japan); Sjoeblom, K.L. [IAEA Waste Management Division, Vienna (Austria)

    1997-08-25

    As part of the International Arctic Seas Assessment Project (IASAP) of the International Atomic Energy Agency (IAEA), a working group was created to model the dispersal and transfer of radionuclides released from radioactive waste disposed of in the Kara Sea. The objectives of this group are: (1) development of realistic and reliable assessment models for the dispersal of radioactive contaminants both within, and from, the Arctic ocean; and (2) evaluation of the contributions of different transfer mechanisms to contaminant dispersal and hence, ultimately, to the risks to human health and environment. With regard to the first objective, the modelling work has been directed towards assessment of model reliability and as one aspect of this, a benchmarking exercise has been carried out. This paper briefly describes the benchmark scenario, the models developed and used, and discusses some of the benchmarking results. The role of the exercise within the modelling programme of IASAP will be discussed and future work described.

  19. Developing Effective Working Relationships.

    Science.gov (United States)

    Bennett, Roger, Ed.; And Others

    1990-01-01

    Two workshops are described in detail. One explores ways to increase the effectiveness of work groups and includes the workshop leader's personal observations. The second involves training transformational leaders, whose characteristics include idealized influence, individualized consideration, intellectual stimulation, and inspirational…

  20. Computers, Networks and Work.

    Science.gov (United States)

    Sproull, Lee; Kiesler, Sara

    1991-01-01

    Discussed are how computer networks can affect the nature of work and the relationships between managers and employees. The differences between face-to-face exchanges and electronic interactions are described. (KR)

  1. A more robust Boolean model describing inhibitor binding

    Institute of Scientific and Technical Information of China (English)

    Zhaoqian Steven XIE; Chao TANG

    2008-01-01

    From the first application of the Boolean model to the cell cycle regulation network of budding yeast, new regulative pathways have been discovered, par-ticularly in the G1/S transition circuit. This discovery called for finer modeling to study the essential biology, and the resulting outcomes are first introduced in the ar-ticle. A traditional Boolean network model set up for the new G1/S transition circuit shows that it cannot correctly simulate real biology unless the model parameters are fine tuned. The deficiency is caused by an overly coarse-grained description of the inhibitor binding process, which shall be overcome by a two-vector model proposed whose robustness is surveyed using random perturba-tions. Simulations show that the proposed two-vector model is much more robust in describing inhibitor binding processes within the Boolean framework.

  2. Does classical mechanics always adequately describe "classical physical reality"

    CERN Document Server

    Shemi-zadeh, V E

    2002-01-01

    The article is dedicated to discussion of irreversibility and foundation of statistical mechanics "from the first principles". Taking into account infinitesimal and, as it seems, neglectful for classical mechanics fluctuations of the physical vacuum, makes a deterministic motion of unstable dynamic systems is broken ("spontaneous determinism breaking", "spontaneous stochastization"). Vacuum fluctuations play part of the trigger, starting the powerful mechanism of exponent instability. The motion of the dynamic systems becomes irreversible and stochastic. Classical mechanics turns out to be applicable only for a small class of stable dynamic systems with zero Kolmogorov-Sinay entropy $h=0$. For alternative "Stochastic mechanics" there are corresponding equations of motion and Master Equation, describing irreversible evolution of the initial distribution function to equilibrium state.

  3. Detecting and describing the modular structures of weighted networks

    Institute of Scientific and Technical Information of China (English)

    Li Ke-Ping; Gao Zi-You

    2007-01-01

    In the functional properties of complex networks, modules play a central role.In this paper,we propose a new method to detect and describe the modular structures of weighted networks. In order to test the proposed method, as an example, we use our method to analyse the structural properties of the Chinese railway network. Here, the stations are regarded as the nodes and the track sections are regarded as the links. Rigorous analysis of the existing data shows that using the proposed algorithm, the nodes of network can be classified naturally. Moreover, there are several core nodes in each module. Remarkably, we introduce the correlation function Grs, and use it to distinguish the different modules in weighted networks.

  4. Angular momentum and torque described with the complex octonion

    CERN Document Server

    Weng, Zi-Hua

    2015-01-01

    The paper aims to adopt the complex octonion to formulate the angular momentum, torque, and force etc in the electromagnetic and gravitational fields. Applying the octonionic representation enables one single definition of angular momentum (or torque, force) to combine some physics contents, which were considered to be independent of each other in the past. J. C. Maxwell used simultaneously two methods, the vector terminology and quaternion analysis, to depict the electromagnetic theory. It motivates the paper to introduce the quaternion space into the field theory, describing the physical feature of electromagnetic and gravitational fields. The spaces of two fields can be chosen as the quaternion spaces, while the coordinate component of quaternion space is able to be the complex number. The quaternion space of electromagnetic field is independent of that of gravitational field. These two quaternion spaces may compose one octonion space. Contrarily, one octonion space can be separated into two subspaces, the...

  5. Describing pulsar wind nebulae with a simple leptonic model

    Energy Technology Data Exchange (ETDEWEB)

    Hahn, Joachim; Hoppe, Stefan; Domainko, Wilfried; Hofmann, Werner [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Egberts, Kathrin [Institut fuer Astro- und Teilchenphysik, Leopold-Franzens-Universitaet Innsbruck (Austria)

    2010-07-01

    In recent years, Cherenkov telescopes like e.g. H.E.S.S. have identified a large number of very-high-energy (VHE) gamma-ray sources as Pulsar wind nebulae (PWNe). The VHE-gamma-ray emission shows a rich diversity of spectral and spatial morphologies. Theoretical models can help to understand and interprete the observed source properties. A simple semi-analytical leptonic model describing VHE gamma-ray emission from PWNe is presented. It assumes diffusion with radiative cooling as the transport mechanism for electrons and their interaction with radiative and interstellar magnetic fields as the origin of electromagnetic radiation. In the framework of this model, spectral and spatial properties of the expected VHE gamma-ray emission from single PWNe may be estimated.

  6. Sociodemographic differences in dietary habits described by food frequency questions

    DEFF Research Database (Denmark)

    Dynesen, Anja Weirsøe; Haraldsdottír, Johanna; Holm, Lotte;

    2003-01-01

    be a valuable supplement to traditional quantitative dietary surveys in monitoring sociodemographic changes in eating patterns. The results also underline the influence of sociodemographic status on dietary habits. SPONSORSHIP: The Danish Nutrition Council funded the study.......OBJECTIVES: To investigate whether a modest number of food frequency questions are sufficient to describe sociodemographic differences in dietary habits, and to identify sociodemographic characteristics of subjects adhering to food-based dietary guidelines operationalised in a "healthy-diet index...... frequency questions, a question on type of fat spreads used on bread, questions on seven sociodemographic variables. RESULTS: The summary of the healthy-diet index showed that the subjects who adhered to food-based dietary guidelines (top quintile) compared to those who did not (bottom quintile) were most...

  7. Knowledge epidemics and population dynamics models for describing idea diffusion

    CERN Document Server

    Vitanov, Nikolay K

    2012-01-01

    The diffusion of ideas is often closely connected to the creation and diffusion of knowledge and to the technological evolution of society. Because of this, knowledge creation, exchange and its subsequent transformation into innovations for improved welfare and economic growth is briefly described from a historical point of view. Next, three approaches are discussed for modeling the diffusion of ideas in the areas of science and technology, through (i) deterministic, (ii) stochastic, and (iii) statistical approaches. These are illustrated through their corresponding population dynamics and epidemic models relative to the spreading of ideas, knowledge and innovations. The deterministic dynamical models are considered to be appropriate for analyzing the evolution of large and small societal, scientific and technological systems when the influence of fluctuations is insignificant. Stochastic models are appropriate when the system of interest is small but when the fluctuations become significant for its evolution...

  8. Probable technologies behind the Vimanas described in Ramayana

    Directory of Open Access Journals (Sweden)

    Shruthi.K.R

    2016-06-01

    Full Text Available In Sanskrit literature there is a prominent place for Maharshi Valmiki‟s Ramayana. This is one of the very few popular epics which are translated to multiple languages across the world. It has seven kaandas (books, five hundred sargas (chapters and twenty four thousand slokas (verses in it. The vimanas are described in various kaandas of Ramayana. It is said that Ravana had the vimana which could appear and disappear, travel long distances with high speed based on the thought power of the master. A few years ago in the year 2013 researchers from the University of Minnesota have designed a model quadcopter which can be flown by the human thought power. As per Prof Bin He from the University of Minnesota, for the first time humans are able to control the flight of flying robots using just their thought sensed from non-invasive brain waves. German scientists from the Technical University of Munich under the leadership of Professor Tim Fricke have simulated the flight of aircraft using thought power of the pilots. This makes us think if such an aircraft with an advanced technology like this existed once upon a time during the era of Ramayana. Carvings of Ravana‟s vimana in Ellora cave temples help us in comparing it with that of modern Jetpack. Descriptions on seating capacity of Pushpaka vimana help us in comparing the same with Airbus 380-800 which can accommodate 853 passengers. Concepts of invisibility of aircrafts make us think of camouflaging techniques and stealth technology used in modern military aircrafts. All these features help us in analyzing the probable technologies behind vimanas described in Ramayana

  9. Current titles

    Energy Technology Data Exchange (ETDEWEB)

    1993-04-01

    116 abstracts are presented of work done with the electron microscope. NCEM is a DOE-designated national user facility and is available at no charge to qualified researchers (assess is controlled by a steering committee).

  10. Narrative, Poststructuralism, and Social Justice: Current Practices in Narrative Therapy

    Science.gov (United States)

    Combs, Gene; Freedman, Jill

    2012-01-01

    This paper is a review of current practice in narrative therapy with a focus on how it is attractive and useful for therapists who wish to work for social justice. The authors describe narrative therapy's roots in poststructuralist philosophy and social science. They illustrate its major theoretical constructs, including the "narrative metaphor,"…

  11. Endorsement of Models Describing Sexual Response of Men and Women with a Sexual Partner

    DEFF Research Database (Denmark)

    Giraldi, Annamaria; Kristensen, Ellids; Sand, Michael

    2015-01-01

    INTRODUCTION: Several models have been used to describe men's and women's sexual responses. These models have been conceptualized as linear or circular models. The circular models were proposed to describe women's sexual function best. AIM: This study aims to determine whether men and women thought...... that current theoretical models of sexual responses accurately reflected their own sexual experience and to what extent this was influenced by sexual dysfunction. METHODS: A cross-sectional study of a large, broadly sampled, nonclinical population, cohort of Danish men and women. The Female Sexual Function...... Index, Female Sexual Distress Scale, and the International Index of Erectile Function were used to describe sexual function. Also, participants completed questionnaires with written descriptions of different sexual responses to describe their most experienced sexual response. MAIN OUTCOME MEASURE...

  12. O Serviço Social crítico no atual contexto de redemocratização da América Latina Critical Social Work in the current context of Latin American redemocratization

    Directory of Open Access Journals (Sweden)

    Douglas Ribeiro Barboza

    2006-12-01

    Full Text Available O artigo busca analisar as particularidades do processo de redemocratização dos regimes políticos latino-americanos, tentando contribuir para o esclarecimento de fenômenos hoje centrais na compreensão destas sociedades e, conseqüentemente, do solo onde se desenvolvem as práticas do Serviço Social. Desde os anos 1980, a tentativa da América Latina em reorganizar sua vida pública em conformidade com os preceitos democráticos liberais demonstrou uma desigualdade de forças políticas na negociação desta transição, onde avanços políticos foram acompanhados pelo agravamento das condições de vida das maiorias nacionais. Como o Serviço Social crítico surge - historicamente - no marco de ordenamentos democráticos, a conformação da profissão relaciona-se intrinsecamente com as debilidades deste processo, onde emergem novos desafios para construção da identidade dos assistentes sociais, principalmente no debate do sentido da sua prática, do processo de conhecimento crítico e no redimensionamento de propostas relevantes na defesa de um projeto socialmente necessário no contexto latino-americano atual.This article analyses the particularities of the redemocratization process of Latin American political regimes, in an attempt to contribute to the understanding of phenomenon central to our societies today. Since the 1980's, the attempt by Latin America to reorganize its public life in conformity with liberal democratic precepts demonstrated an inequality of political forces in the negotiation of this transition, where political advances were accompanied by the deterioration of living conditions among national majorities. Since critical Social Work historically arose in the framework of democratic regulations, the formation of the profession was intrinsically related to the weaknesses of this process, from which emerge new challenges to the construction of the identity of social workers, principally in the debate over the meaning

  13. SITUACIÓN DEL MERCADO LABORAL ACTUAL EN EL ÁMBITO DE LA ACTIVIDAD FÍSICA Y DEPORTIVA Current working panorama in the Physical Activity and Sport field

    Directory of Open Access Journals (Sweden)

    A. Sánchez

    2010-09-01

    Full Text Available

     

    El artículo pretende identificar y definir los actuales campos y ámbitos de actuación de los profesionales de la actividad física y deportiva, que al margen de otras circunstancias, son elegidos por factores vocacionales, laborales y/o económicos. Se determinan cuatros campos como son la enseñanza-investigación, gestión-recreación deportiva, entrenamiento deportivo y actividad física para la salud y se detallan las características que definen a cada uno de estos cuatro campos. De igual forma, se realiza un análisis de las diferentes titulaciones, desde la doble perspectiva de la formación académica y de la normativa legal existente, para realizar una propuesta de asignación de campos y funciones a cada una de ellas. Seguidamente se hace un análisis de la situación de las relaciones laborales finalizando con unas conclusiones y propuestas encaminadas a regular el marco laboral de estos profesionales.
    PALABRAS CLAVE: Mercado laboral, salidas profesionales, gestión deportiva, recreación física, entrenamiento, actividad física y salud.

    The article aims it at identify and to defining the currents fields and activities which professionals of Physical Education and activities in which, professionals in Physical Education and Sport Activities which, in the margin of other circumstances, are chosen on the basis of vocational, labour and/or economical factors. They are decisive in four fields such as teaching, researching, sport management-recreation, sport training and physical activity for the health and each of these characteristics is defined within its own field. Likewise, an analysis is given of the different stydy plans, from the double perspective of academic training and existing legal norms, to be able to put forward a proposal about the assignments of the fields and functions of both of them. Inmediattely

  14. Second order evolution equations which describe pseudospherical surfaces

    Science.gov (United States)

    Catalano Ferraioli, D.; de Oliveira Silva, L. A.

    2016-06-01

    Second order evolution differential equations that describe pseudospherical surfaces are considered. These equations are equivalent to the structure equations of a metric with Gaussian curvature K = - 1, and can be seen as the compatibility condition of an associated sl (2 , R) -valued linear problem, also referred to as a zero curvature representation. Under the assumption that the linear problem is defined by 1-forms ωi =fi1 dx +fi2 dt, i = 1 , 2 , 3, with fij depending on (x , t , z ,z1 ,z2) and such that f21 = η, η ∈ R, we give a complete and explicit classification of equations of the form zt = A (x , t , z) z2 + B (x , t , z ,z1) . According to the classification, these equations are subdivided in three main classes (referred to as Types I-III) together with the corresponding linear problems. Explicit examples of differential equations of each type are determined by choosing certain arbitrary differentiable functions. Svinolupov-Sokolov equations admitting higher weakly nonlinear symmetries, Boltzmann equation and reaction-diffusion equations like Murray equation are some known examples of such equations. Other explicit examples are presented, as well.

  15. The complexity of organizational change: describing communication during organizational turbulence.

    Science.gov (United States)

    Salem, Philip

    2013-01-01

    Organizational researchers and practitioners have been interested in organizational change for some time. Historically, they have directed most of their efforts at improving the efficiency of planned top-down change. These efforts were strategic attempts at altering parameters leading to transformational change. Most efforts failed to meet their intended purposes. Transformational organizational change has not been likely. The legitimate systems have been robust. There has been little systematic investigation of the communication occurring during these efforts. The purpose of this essay is to describe results of a mixed methods research project answering two research questions. (a) How do organizational members communicate during a time of turbulence? (b) What features of this communication suggest the potential for or resistance to transformative change? Comparing the results at the beginning of the period to other periods, gives insight into how social actors communicate and enact the organization during a threshold period where transformational change was possible. Results reveal identifiable patterns of communication as communication strategies, parameters, or basins of attraction. The overall pattern explains how micro communication patterns intersect and how the accumulation of these patterns may resist or accomplish change at a macro level.

  16. Describing the Breakbone Fever: IDODEN, an Ontology for Dengue Fever

    Science.gov (United States)

    Mitraka, Elvira; Topalis, Pantelis; Dritsou, Vicky; Dialynas, Emmanuel; Louis, Christos

    2015-01-01

    Background Ontologies represent powerful tools in information technology because they enhance interoperability and facilitate, among other things, the construction of optimized search engines. To address the need to expand the toolbox available for the control and prevention of vector-borne diseases we embarked on the construction of specific ontologies. We present here IDODEN, an ontology that describes dengue fever, one of the globally most important diseases that are transmitted by mosquitoes. Methodology/Principal Findings We constructed IDODEN using open source software, and modeled it on IDOMAL, the malaria ontology developed previously. IDODEN covers all aspects of dengue fever, such as disease biology, epidemiology and clinical features. Moreover, it covers all facets of dengue entomology. IDODEN, which is freely available, can now be used for the annotation of dengue-related data and, in addition to its use for modeling, it can be utilized for the construction of other dedicated IT tools such as decision support systems. Conclusions/Significance The availability of the dengue ontology will enable databases hosting dengue-associated data and decision-support systems for that disease to perform most efficiently and to link their own data to those stored in other independent repositories, in an architecture- and software-independent manner. PMID:25646954

  17. Entropic-Skins Geometry to Describe Wall Turbulence Intermittency

    Directory of Open Access Journals (Sweden)

    Diogo Queiros-Conde

    2015-04-01

    Full Text Available In order to describe the phenomenon of intermittency in wall turbulence and, more particularly, the behaviour of moments  and and intermittency exponents ζP with the order p and distance to the wall, we developed a new geometrical framework called “entropic-skins geometry” based on the notion of scale-entropy which is here applied to an experimental database of boundary layer flows. Each moment has its own spatial multi-scale support Ωp (“skin”. The model assumes the existence of a hierarchy of multi-scale sets Ωp ranged from the “bulk” to the “crest”. The crest noted characterizes the geometrical support where the most intermittent (the highest fluctuations in energy dissipation occur; the bulk is the geometrical support for the whole range of fluctuations. The model assumes then the existence of a dynamical flux through the hierarchy of skins. The specific case where skins display a fractal structure is investigated. Bulk fractal dimension  and crest dimension  are linked by a scale-entropy flux defining a reversibility efficiency  (d is the embedding dimension. The model, initially developed for homogeneous and isotropic turbulent flows, is applied here to wall bounded turbulence where intermittency exponents are measured by extended self-similarity. We obtained for intermittency exponents the analytical expression with γ ≈ 0.36 in agreement with experimental results.

  18. Folding superfunnel to describe cooperative folding of interacting proteins.

    Science.gov (United States)

    Smeller, László

    2016-07-01

    This paper proposes a generalization of the well-known folding funnel concept of proteins. In the funnel model the polypeptide chain is treated as an individual object not interacting with other proteins. Since biological systems are considerably crowded, protein-protein interaction is a fundamental feature during the life cycle of proteins. The folding superfunnel proposed here describes the folding process of interacting proteins in various situations. The first example discussed is the folding of the freshly synthesized protein with the aid of chaperones. Another important aspect of protein-protein interactions is the folding of the recently characterized intrinsically disordered proteins, where binding to target proteins plays a crucial role in the completion of the folding process. The third scenario where the folding superfunnel is used is the formation of aggregates from destabilized proteins, which is an important factor in case of several conformational diseases. The folding superfunnel constructed here with the minimal assumption about the interaction potential explains all three cases mentioned above. Proteins 2016; 84:1009-1016. © 2016 Wiley Periodicals, Inc.

  19. An ontological approach to describing neurons and their relationships

    Science.gov (United States)

    Hamilton, David J.; Shepherd, Gordon M.; Martone, Maryann E.; Ascoli, Giorgio A.

    2012-01-01

    The advancement of neuroscience, perhaps one of the most information rich disciplines of all the life sciences, requires basic frameworks for organizing the vast amounts of data generated by the research community to promote novel insights and integrated understanding. Since Cajal, the neuron remains a fundamental unit of the nervous system, yet even with the explosion of information technology, we still have few comprehensive or systematic strategies for aggregating cell-level knowledge. Progress toward this goal is hampered by the multiplicity of names for cells and by lack of a consensus on the criteria for defining neuron types. However, through umbrella projects like the Neuroscience Information Framework (NIF) and the International Neuroinformatics Coordinating Facility (INCF), we have the opportunity to propose and implement an informatics infrastructure for establishing common tools and approaches to describe neurons through a standard terminology for nerve cells and a database (a Neuron Registry) where these descriptions can be deposited and compared. This article provides an overview of the problem and outlines a solution approach utilizing ontological characterizations. Based on illustrative implementation examples, we also discuss the need for consensus criteria to be adopted by the research community, and considerations on future developments. A scalable repository of neuron types will provide researchers with a resource that materially contributes to the advancement of neuroscience. PMID:22557965

  20. Conceptual hierarchical modeling to describe wetland plant community organization

    Science.gov (United States)

    Little, A.M.; Guntenspergen, G.R.; Allen, T.F.H.

    2010-01-01

    Using multivariate analysis, we created a hierarchical modeling process that describes how differently-scaled environmental factors interact to affect wetland-scale plant community organization in a system of small, isolated wetlands on Mount Desert Island, Maine. We followed the procedure: 1) delineate wetland groups using cluster analysis, 2) identify differently scaled environmental gradients using non-metric multidimensional scaling, 3) order gradient hierarchical levels according to spatiotem-poral scale of fluctuation, and 4) assemble hierarchical model using group relationships with ordination axes and post-hoc tests of environmental differences. Using this process, we determined 1) large wetland size and poor surface water chemistry led to the development of shrub fen wetland vegetation, 2) Sphagnum and water chemistry differences affected fen vs. marsh / sedge meadows status within small wetlands, and 3) small-scale hydrologic differences explained transitions between forested vs. non-forested and marsh vs. sedge meadow vegetation. This hierarchical modeling process can help explain how upper level contextual processes constrain biotic community response to lower-level environmental changes. It creates models with more nuanced spatiotemporal complexity than classification and regression tree procedures. Using this process, wetland scientists will be able to generate more generalizable theories of plant community organization, and useful management models. ?? Society of Wetland Scientists 2009.

  1. An ontological approach to describing neurons and their relationships

    Directory of Open Access Journals (Sweden)

    David J. Hamilton

    2012-04-01

    Full Text Available The advancement of neuroscience, perhaps the most information rich discipline of all the life sciences, requires basic frameworks for organizing the vast amounts of data generated by the research community to promote novel insights and integrated understanding. Since Cajal, the neuron remains a fundamental unit of the nervous system, yet even with the explosion of information technology, we still have few comprehensive or systematic strategies for aggregating cell-level knowledge. Progress toward this goal is hampered by the multiplicity of names for cells and by lack of a consensus on the criteria for defining neuron types. However, through umbrella projects like the Neuroscience Information Framework and the International Neuroinformatics Coordinating Facility, we have the opportunity to propose and implement an informatics infrastructure for establishing common tools and approaches to describe neurons through a standard terminology for nerve cells and a database (a Neuron Registry where these descriptions can be deposited and compared. This article provides an overview of the problem and outlines a solution approach utilizing ontological characterizations.

  2. Canonical quantization of a string describing N branes at angles

    Science.gov (United States)

    Pesando, Igor

    2014-12-01

    We study the canonical quantization of a bosonic string in presence of N twist fields. This generalizes the quantization of the twisted string in two ways: the in and out states are not necessarily twisted and the number of twist fields N can be bigger than 2. In order to quantize the theory we need to find the normal modes. Then we need to define a product between two modes which is conserved. Because of this we need to use the Klein-Gordon product and to separate the string coordinate into the classical and the quantum part. The quantum part has different boundary conditions than the original string coordinates but these boundary conditions are precisely those which make the operator describing the equation of motion self adjoint. The splitting of the string coordinates into a classical and quantum part allows the formulation of an improved overlap principle. Using this approach we then proceed in computing the generating function for the generic correlator with L untwisted operators and N (excited) twist fields for branes at angles. We recover as expected the results previously obtained using the path integral. This construction explains why these correlators are given by a generalization of the Wick theorem.

  3. Advanced Mathematical Model to Describe the Production of Biodiesel Process

    Directory of Open Access Journals (Sweden)

    Hikmat S. Al-Salim

    2009-12-01

    Full Text Available Advanced mathematical model was used to capture the batch reactor characteristics of reacting compounds. The model was applied to batch reactor for the production of bio-diesel from palm and kapok oils. Results of the model were compared with experimental data in terms of conversion of transesterification reaction for the production of bio-diesel under unsteady state. A good agreement was obtained between our model predictions and the experimental data. Both experimental and modeling results showed that the conversion of triglycerides to methyl ester was affected by the process conditions. The transesterification process with temperature of about 70 oC, and methanol ratio to the triglyceride of about 5 times its stoichiometry, and the NAOH catalyst of wt 0.4%, appear to be acceptable process conditions for bio diesel process production from palm oil and kapok oil. The model can be applied for endothermic batch process. © 2009 BCREC UNDIP. All rights reserved[Received: 12 August 2009, Revised: 15 October 2009; Accepted: 18 October 2009][How to Cite: A.S. Ibrehem, H. S. Al-Salim. (2009. Advanced Mathematical Model to Describe the Production of Biodiesel Process. Bulletin of Chemical Reaction Engineering and Catalysis, 4(2: 37-42. doi:10.9767/bcrec.4.2.28.37-42][How to Link/DOI: http://dx.doi.org/10.9767/bcrec.4.2.28.37-42

  4. Describing neutrino oscillations in matter with Magnus expansion

    Energy Technology Data Exchange (ETDEWEB)

    Ioannisian, A.N. [Yerevan Physics Institute, Alikhanian Br. 2, 375036 Yerevan (Armenia); Institute for Theoretical Physics and Modeling, 375036 Yerevan (Armenia)], E-mail: ara.ioannisyan@cern.ch; Smirnov, A.Yu. [International Centre for Theoretical Physics, Strada Costiera 11, 34014 Trieste (Italy); Institute for Nuclear Research, Russian Academy of Sciences, Moscow (Russian Federation)

    2009-07-21

    We present new formalism for description of the neutrino oscillations in matter with varying density. The formalism is based on the Magnus expansion and has a virtue that the unitarity of the S-matrix is maintained in each order of perturbation theory. We show that the Magnus expansion provides better convergence of series: the restoration of unitarity leads to smaller deviations from the exact results especially in the regions of large transition probabilities. Various expansions are obtained depending on a basis of neutrino states and a way one splits the Hamiltonian into the self-commuting and non-commuting parts. In particular, we develop the Magnus expansion for the adiabatic perturbation theory which gives the best approximation. We apply the formalism to the neutrino oscillations in matter of the Earth and show that for the solar oscillation parameters the second order Magnus adiabatic expansion has better than 1% accuracy for all energies and trajectories. For the atmospheric {delta}m{sup 2} and small 1-3 mixing the approximation works well (<3% accuracy for sin{sup 2}{theta}{sub 13}=0.01) outside the resonance region 2.7-8 GeV.

  5. A Framework to Describe, Analyze and Generate Interactive Motor Behaviors

    Science.gov (United States)

    Jarrassé, Nathanaël; Charalambous, Themistoklis; Burdet, Etienne

    2012-01-01

    While motor interaction between a robot and a human, or between humans, has important implications for society as well as promising applications, little research has been devoted to its investigation. In particular, it is important to understand the different ways two agents can interact and generate suitable interactive behaviors. Towards this end, this paper introduces a framework for the description and implementation of interactive behaviors of two agents performing a joint motor task. A taxonomy of interactive behaviors is introduced, which can classify tasks and cost functions that represent the way each agent interacts. The role of an agent interacting during a motor task can be directly explained from the cost function this agent is minimizing and the task constraints. The novel framework is used to interpret and classify previous works on human-robot motor interaction. Its implementation power is demonstrated by simulating representative interactions of two humans. It also enables us to interpret and explain the role distribution and switching between roles when performing joint motor tasks. PMID:23226231

  6. Describing neutrino oscillations in matter with Magnus expansion

    Science.gov (United States)

    Ioannisian, A. N.; Smirnov, A. Yu.

    2009-07-01

    We present new formalism for description of the neutrino oscillations in matter with varying density. The formalism is based on the Magnus expansion and has a virtue that the unitarity of the S-matrix is maintained in each order of perturbation theory. We show that the Magnus expansion provides better convergence of series: the restoration of unitarity leads to smaller deviations from the exact results especially in the regions of large transition probabilities. Various expansions are obtained depending on a basis of neutrino states and a way one splits the Hamiltonian into the self-commuting and non-commuting parts. In particular, we develop the Magnus expansion for the adiabatic perturbation theory which gives the best approximation. We apply the formalism to the neutrino oscillations in matter of the Earth and show that for the solar oscillation parameters the second order Magnus adiabatic expansion has better than 1% accuracy for all energies and trajectories. For the atmospheric Δm and small 1-3 mixing the approximation works well (<3% accuracy for sinθ=0.01) outside the resonance region 2.7-8 GeV.

  7. Currents, attenuation, temperature, conductivity, and pressure in the North Atlantic Ocean on the New England Continental Slope from the RV OCEANUS from November 10th, 1982 through November 18th, 1984 (NODC Accession 0066097)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A study of currents on the Continental Slope designed to describe the currents and to investigate the transport of sediment from the shelf to the slope. This work...

  8. CORRECTING WRITTEN WORK

    Institute of Scientific and Technical Information of China (English)

    1994-01-01

    Introduction During the teaching and learning process, teachers often check how much students have understood through written assignments. In this article I’d like to describe one method of correcting students’ written work by using a variety of symbols to indicate where students have gone wrong, then asking students to correct their work themselves.

  9. Mothers, work and childcare

    NARCIS (Netherlands)

    Ingrid Ooms; Evelien Eggink; Edwin van Gameren

    2007-01-01

    Original title: Moeders, werk en kinderopvang in model. The government wants women to go out to work more. The choices made by women between working and looking after children are accordingly receiving a great deal of attention. This report describes which factors influence these choices by mothers

  10. Sensitivity analysis approach to multibody systems described by natural coordinates

    Science.gov (United States)

    Li, Xiufeng; Wang, Yabin

    2014-03-01

    The classical natural coordinate modeling method which removes the Euler angles and Euler parameters from the governing equations is particularly suitable for the sensitivity analysis and optimization of multibody systems. However, the formulation has so many principles in choosing the generalized coordinates that it hinders the implementation of modeling automation. A first order direct sensitivity analysis approach to multibody systems formulated with novel natural coordinates is presented. Firstly, a new selection method for natural coordinate is developed. The method introduces 12 coordinates to describe the position and orientation of a spatial object. On the basis of the proposed natural coordinates, rigid constraint conditions, the basic constraint elements as well as the initial conditions for the governing equations are derived. Considering the characteristics of the governing equations, the newly proposed generalized-α integration method is used and the corresponding algorithm flowchart is discussed. The objective function, the detailed analysis process of first order direct sensitivity analysis and related solving strategy are provided based on the previous modeling system. Finally, in order to verify the validity and accuracy of the method presented, the sensitivity analysis of a planar spinner-slider mechanism and a spatial crank-slider mechanism are conducted. The test results agree well with that of the finite difference method, and the maximum absolute deviation of the results is less than 3%. The proposed approach is not only convenient for automatic modeling, but also helpful for the reduction of the complexity of sensitivity analysis, which provides a practical and effective way to obtain sensitivity for the optimization problems of multibody systems.

  11. Describing rainfall in northern Australia using multiple climate indices

    Science.gov (United States)

    Wilks Rogers, Cassandra Denise; Beringer, Jason

    2017-02-01

    Savanna landscapes are globally extensive and highly sensitive to climate change, yet the physical processes and climate phenomena which affect them remain poorly understood and therefore poorly represented in climate models. Both human populations and natural ecosystems are highly susceptible to precipitation variation in these regions due to the effects on water and food availability and atmosphere-biosphere energy fluxes. Here we quantify the relationship between climate phenomena and historical rainfall variability in Australian savannas and, in particular, how these relationships changed across a strong rainfall gradient, namely the North Australian Tropical Transect (NATT). Climate phenomena were described by 16 relevant climate indices and correlated against precipitation from 1900 to 2010 to determine the relative importance of each climate index on seasonal, annual and decadal timescales. Precipitation trends, climate index trends and wet season characteristics have also been investigated using linear statistical methods. In general, climate index-rainfall correlations were stronger in the north of the NATT where annual rainfall variability was lower and a high proportion of rainfall fell during the wet season. This is consistent with a decreased influence of the Indian-Australian monsoon from the north to the south. Seasonal variation was most strongly correlated with the Australian Monsoon Index, whereas yearly variability was related to a greater number of climate indices, predominately the Tasman Sea and Indonesian sea surface temperature indices (both of which experienced a linear increase over the duration of the study) and the El Niño-Southern Oscillation indices. These findings highlight the importance of understanding the climatic processes driving variability and, subsequently, the importance of understanding the relationships between rainfall and climatic phenomena in the Northern Territory in order to project future rainfall patterns in the

  12. Probabilistic models to describe the dynamics of migrating microbial communities.

    Directory of Open Access Journals (Sweden)

    Joanna L Schroeder

    Full Text Available In all but the most sterile environments bacteria will reside in fluid being transported through conduits and some of these will attach and grow as biofilms on the conduit walls. The concentration and diversity of bacteria in the fluid at the point of delivery will be a mix of those when it entered the conduit and those that have become entrained into the flow due to seeding from biofilms. Examples include fluids through conduits such as drinking water pipe networks, endotracheal tubes, catheters and ventilation systems. Here we present two probabilistic models to describe changes in the composition of bulk fluid microbial communities as they are transported through a conduit whilst exposed to biofilm communities. The first (discrete model simulates absolute numbers of individual cells, whereas the other (continuous model simulates the relative abundance of taxa in the bulk fluid. The discrete model is founded on a birth-death process whereby the community changes one individual at a time and the numbers of cells in the system can vary. The continuous model is a stochastic differential equation derived from the discrete model and can also accommodate changes in the carrying capacity of the bulk fluid. These models provide a novel Lagrangian framework to investigate and predict the dynamics of migrating microbial communities. In this paper we compare the two models, discuss their merits, possible applications and present simulation results in the context of drinking water distribution systems. Our results provide novel insight into the effects of stochastic dynamics on the composition of non-stationary microbial communities that are exposed to biofilms and provides a new avenue for modelling microbial dynamics in systems where fluids are being transported.

  13. Advanced Mathematical Model to Describe the Production of Biodiesel Process

    Directory of Open Access Journals (Sweden)

    Ahmmed S. Ibrehem

    2009-12-01

    Full Text Available Advanced mathematical model was used to capture the batch reactor characteristics of reacting compounds. The model was applied to batch reactor for the production of bio-diesel from palm and kapok oils. Results of the model were compared with experimental data in terms of conversion of transesterification reaction for the production of bio-diesel under unsteady state. A good agreement was obtained between our model predictions and the experimental data. Both experimental and modeling results showed that the conversion of triglycerides to methyl ester was affected by the process conditions. The transesterification process with temperature of about 70 oC, and methanol ratio to the triglyceride of about 5 times its stoichiometry, and the NAOH catalyst of wt 0.4%, appear to be acceptable process conditions for bio diesel process production from palm oil and kapok oil. The model can be applied for endothermic batch process. © 2009 BCREC UNDIP. All rights reserved[Received: 12 August 2009, Revised: 15 October 2009; Accepted: 18 October 2009][How to Cite: A.S. Ibrehem, H. S. Al-Salim. (2009. Advanced Mathematical Model to Describe the Production of Biodiesel Process. Bulletin of Chemical Reaction Engineering and Catalysis, 4(2: 37-42.  doi:10.9767/bcrec.4.2.7109.37-42][How to Link/DOI: http://dx.doi.org/10.9767/bcrec.4.2.7109.37-42 || or local:  http://ejournal.undip.ac.id/index.php/bcrec/article/view/7109 ] 

  14. Digital clocks: simple Boolean models can quantitatively describe circadian systems.

    Science.gov (United States)

    Akman, Ozgur E; Watterson, Steven; Parton, Andrew; Binns, Nigel; Millar, Andrew J; Ghazal, Peter

    2012-09-07

    The gene networks that comprise the circadian clock modulate biological function across a range of scales, from gene expression to performance and adaptive behaviour. The clock functions by generating endogenous rhythms that can be entrained to the external 24-h day-night cycle, enabling organisms to optimally time biochemical processes relative to dawn and dusk. In recent years, computational models based on differential equations have become useful tools for dissecting and quantifying the complex regulatory relationships underlying the clock's oscillatory dynamics. However, optimizing the large parameter sets characteristic of these models places intense demands on both computational and experimental resources, limiting the scope of in silico studies. Here, we develop an approach based on Boolean logic that dramatically reduces the parametrization, making the state and parameter spaces finite and tractable. We introduce efficient methods for fitting Boolean models to molecular data, successfully demonstrating their application to synthetic time courses generated by a number of established clock models, as well as experimental expression levels measured using luciferase imaging. Our results indicate that despite their relative simplicity, logic models can (i) simulate circadian oscillations with the correct, experimentally observed phase relationships among genes and (ii) flexibly entrain to light stimuli, reproducing the complex responses to variations in daylength generated by more detailed differential equation formulations. Our work also demonstrates that logic models have sufficient predictive power to identify optimal regulatory structures from experimental data. By presenting the first Boolean models of circadian circuits together with general techniques for their optimization, we hope to establish a new framework for the systematic modelling of more complex clocks, as well as other circuits with different qualitative dynamics. In particular, we anticipate

  15. The pearls and pitfalls of skull trephination as described in the Hippocratic treatise "On Head Wounds".

    Science.gov (United States)

    Dimopoulos, Vassilios G; Robinson, Joe Sam; Fountas, Kostas N

    2008-01-01

    The purpose of our current study is to describe the guidelines regarding trephination as suggested in the Hippocratic writer's book, "Peri ton en cephali traumaton" ("On Head Wounds"). The ancient Greek text was reviewed as well as two English translations. The Hippocratic author described the indications, timing, and techniques of trephination for patients with head injury. He emphasized that attention should be paid to the details of the employed technique. He also commented on the difference of skull thickness at different anatomical sites and also between different age groups. The Hippocratic recommendations provided details for the performance of trephination by the ancient Greek physicians that are still considered important in modern neurosurgery.

  16. Current Titles

    Energy Technology Data Exchange (ETDEWEB)

    Various

    2006-06-01

    This booklet is published for those interested in current research being conducted at the National Center for Electron Microscopy. The NCEM is a DOE-designated national user facility and is available at no charge to qualified researchers. Access is controlled by an external steering committee. Interested researchers may contact Jane Cavlina, Administrator, at 510/486-6036.

  17. Current Research.

    Science.gov (United States)

    Hunt, Mary Alice

    1981-01-01

    Describes a doctoral dissertation entitled "World-Future Images in Childrens Literature" which analyzed books on science fiction or utopian fiction by 43 authors of children's literature to determine whether presentations were optimistic or pessimistic. Results indicating generally optimistic stories are discussed, as well as strengths and…

  18. Muscle activation described with a differential equation model for large ensembles of locally coupled molecular motors.

    Science.gov (United States)

    Walcott, Sam

    2014-10-01

    Molecular motors, by turning chemical energy into mechanical work, are responsible for active cellular processes. Often groups of these motors work together to perform their biological role. Motors in an ensemble are coupled and exhibit complex emergent behavior. Although large motor ensembles can be modeled with partial differential equations (PDEs) by assuming that molecules function independently of their neighbors, this assumption is violated when motors are coupled locally. It is therefore unclear how to describe the ensemble behavior of the locally coupled motors responsible for biological processes such as calcium-dependent skeletal muscle activation. Here we develop a theory to describe locally coupled motor ensembles and apply the theory to skeletal muscle activation. The central idea is that a muscle filament can be divided into two phases: an active and an inactive phase. Dynamic changes in the relative size of these phases are described by a set of linear ordinary differential equations (ODEs). As the dynamics of the active phase are described by PDEs, muscle activation is governed by a set of coupled ODEs and PDEs, building on previous PDE models. With comparison to Monte Carlo simulations, we demonstrate that the theory captures the behavior of locally coupled ensembles. The theory also plausibly describes and predicts muscle experiments from molecular to whole muscle scales, suggesting that a micro- to macroscale muscle model is within reach.

  19. Mobility Work

    DEFF Research Database (Denmark)

    Bardram, Jakob Eyvind; Bossen, Claus

    2005-01-01

    by constructing Standard Operation Procedures (SOPs), actors minimise mobility work by constructing Standard Operation Configurations (SOCs). We apply the concept of mobility work to the ethnography of hospital work, and argue that mobility arises because of the need to get access to people, places, knowledge and....../or resources. To accomplish their work, actors have to make the right configuration of these four aspects emerge....

  20. Developmental Work

    DEFF Research Database (Denmark)

    Møller, Niels; Hvid, Helge; Kristensen, Tage Søndergaard

    2003-01-01

    Human Deveoplment and Working Life - Work for Welfare explores whether the development of human resources at company level can improve individuals' quality of life, companies' possibilities of development, and welfare and democracy in society. Chapter two discuss the concept "developmental work...

  1. Developmental Work

    DEFF Research Database (Denmark)

    Møller, Niels; Hvid, Helge; Kristensen, Tage Søndergaard;

    2003-01-01

    Human Deveoplment and Working Life - Work for Welfare explores whether the development of human resources at company level can improve individuals' quality of life, companies' possibilities of development, and welfare and democracy in society. Chapter two discuss the concept "developmental work...

  2. Mytho-poetical thought as described by Ernst Cassirer and Lucian Blaga: a comparative approach applied to works of poetry

    Directory of Open Access Journals (Sweden)

    Emilia Ivancu

    2011-12-01

    Full Text Available In the present paper we would like to investigate the concept of mythothought as defined by two philosophers, Ernst Cassirer and Lucian Blaga, and the way in which the term may be applied to a chosen corpus of poetry from Romania, Wales and Ireland.

  3. Education and training for implementation science: our interest in manuscripts describing education and training materials.

    Science.gov (United States)

    Straus, Sharon E; Sales, Anne; Wensing, Michel; Michie, Susan; Kent, Bridie; Foy, Robbie

    2015-09-28

    Alongside the growth in interest in implementation science, there has been a marked increase in training programs, educational courses, degrees, and other offerings in implementation research and practice to meet the demand for this expertise. We believe that the science of capacity building has matured but that we can advance it further by shining light on excellent work in this area and by highlighting gaps for future research. At Implementation Science, we regularly receive manuscripts that describe or evaluate training materials, competencies, and competency development in implementation curricula. We are announcing a renewed interest in manuscripts in this area, with specifications described below.

  4. Human Errors - A Taxonomy for Describing Human Malfunction in Industrial Installations

    DEFF Research Database (Denmark)

    Rasmussen, J.

    1982-01-01

    This paper describes the definition and the characteristics of human errors. Different types of human behavior are classified, and their relation to different error mechanisms are analyzed. The effect of conditioning factors related to affective, motivating aspects of the work situation as well...... as physiological factors are also taken into consideration. The taxonomy for event analysis, including human malfunction, is presented. Possibilities for the prediction of human error are discussed. The need for careful studies in actual work situations is expressed. Such studies could provide a better...... understanding of the complexity of human error situations as well as the data needed to characterize these situations....

  5. Can percolation model describe the evolution of mechanical properties of compacts of binary systems?

    Science.gov (United States)

    Evesque, Pierre; Busignies, Virginie; Porion, Patrice; Leclerc, Bernard; Tchoreloff, Pierre

    2009-06-01

    In pharmaceutical field, the percolation theory is used to describe the change of tablet's properties with the relative density. It defines critical tablet densities from which the mechanical properties start to change. The exponent in the law is expected to be universal for a mechanical property and numerical values are proposed in the literature. In this work, the percolation model was applied to the tensile strength and the reduced modulus of elasticity of three compacted pharmaceutical excipients. This work showed that the exponent seems not universal and that the model must be used carefully.

  6. Interconnection between static regimes in the LJJs described by the double sine-Gordon equation

    Science.gov (United States)

    Atanasova, P. Kh; Zemlyanaya, E. V.; Shukrinov, Yu M.

    2012-11-01

    The second harmonic contribution to the current-phase relation changes the properties of the static magnetic flux distributions in the long Josephson junction (LJJ) and inspires new homogenious and fluxon static states. We study stability properties and bifurcations of these static regimes within the frame of a model described by the double sine-Gordon equation. The critical curves behavior and the interconnection between different types of magnetic flux distributions are analyzed.

  7. Characteristics and distribution of Listeria spp., including Listeria species newly described since 2009

    OpenAIRE

    Orsi, Renato H; Wiedmann, Martin

    2016-01-01

    The genus Listeria is currently comprised of 17 species, including 9 Listeria species newly described since 2009. Genomic and phenotypic data clearly define a distinct group of six species (Listeria sensu strictu) that share common phenotypic characteristics (e.g., ability to grow at low temperature, flagellar motility); this group includes the pathogen Listeria monocytogenes. The other 11 species (Listeria sensu lato) represent three distinct monophyletic groups, which may warrant recognitio...

  8. Electrical engineering of engineers 1. Direct current engineering and electromagnetic field. A lecture and working book for the basic study. 9. rev. ed.; Elektrotechnik fuer Ingenieure 1. Gleichstromtechnik und Elektromagnetisches Feld. Ein Lehr- und Arbeitsbuch fuer das Grundstudium

    Energy Technology Data Exchange (ETDEWEB)

    Weissgerber, Wilfried

    2013-05-01

    The book under consideration covers the basics and calculation methods of the direct current technology as well as the electromagnetic field. The main topics are: fundamental concepts of physics, direct current technology, electric circuit, network calculation, energy and power, electromagnetic field, electric flow field, electrostatic and magnetic fields, induction, magnetic energy. The book is dedicated to the students of engineering and natural sciences, electrical engineering, technical informatics and physics at higher institutes of applied sciences, technical colleges, universities and universities of cooperative education.

  9. "Travaillez, sinon vous serez orientes": essai sur les difficultes actuelles des colleges et lycees francais ("Work, Or You Will Be Counseled out of Education": Essay on the Current Difficulties of French Proprietary and Secondary Schools).

    Science.gov (United States)

    Prost, Antoine

    1985-01-01

    The French situation, in which the proprietary and upper-level secondary schools may contain a large number of "high-risk" or marginally qualified students, and proposed solutions to the problem, are described and discussed. (MSE)

  10. Attention, Working Memory, and Long-Term Memory in Multimedia Learning: An Integrated Perspective Based on Process Models of Working Memory

    Science.gov (United States)

    Schweppe, Judith; Rummer, Ralf

    2014-01-01

    Cognitive models of multimedia learning such as the Cognitive Theory of Multimedia Learning (Mayer 2009) or the Cognitive Load Theory (Sweller 1999) are based on different cognitive models of working memory (e.g., Baddeley 1986) and long-term memory. The current paper describes a working memory model that has recently gained popularity in basic…

  11. Attention, Working Memory, and Long-Term Memory in Multimedia Learning: An Integrated Perspective Based on Process Models of Working Memory

    Science.gov (United States)

    Schweppe, Judith; Rummer, Ralf

    2014-01-01

    Cognitive models of multimedia learning such as the Cognitive Theory of Multimedia Learning (Mayer 2009) or the Cognitive Load Theory (Sweller 1999) are based on different cognitive models of working memory (e.g., Baddeley 1986) and long-term memory. The current paper describes a working memory model that has recently gained popularity in basic…

  12. A Meta-model Describing the Development Process of Mobile Learning

    Science.gov (United States)

    Wingkvist, Anna; Ericsson, Morgan

    This paper presents a meta-model to describe the development process of mobile learning initiatives. These initiatives are often small scale trials that are not integrated in the intended setting, but carried out outside of the setting. This results in sustainability issues, i.e., problems to integrate the results of the initiative as learning aids. In order to address the sustainability issues, and in turn help to understand the scaling process, a meta-model is introduced. This meta-model divides the development into four areas of concern, and the life cycle of any mobile learning initiative into four stages. The meta-model was developed by analyzing and describing how a podcasting initiative was developed, and is currently being evaluated as a tool to both describe and evaluate mobile learning initiatives. The meta-model was developed based on a mobile learning initiative, but the meta-model itself is extendible to other forms of technology-enhanced learning.

  13. The Ambiguity of Work

    DEFF Research Database (Denmark)

    Humle, Didde Maria

    2014-01-01

    This article contributes to the current debate among organizational and work-life researchers on the double-sided nature of knowledge work, which offers great freedom and satisfaction on the one hand and the potential to be overly demanding and stressful on the other. This contribution involves...... drawing on the results of an ethnographic case study of a consultancy house; more specifically, it comprises an exploration of the narrative identity work of consultants as they perform work practice stories of self, work, and the organization negotiating why the work they do is both challenging...... and rewarding. The type of knowledge work explored is characterized by its immaterial nature in the sense that the primary input is the competences, knowledge, and commitment of the consultants and the output is the joy, success, and satisfaction of candidates, clients, and collaborators. The article...

  14. The Ambiguity of work

    DEFF Research Database (Denmark)

    Humle, Didde Maria

    2014-01-01

    This article contributes to the current debate among organizational and work-life researchers on the double-sided nature of knowledge work, which offers great freedom and satisfaction on the one hand and the potential to be overly demanding and stressful on the other. This contribution involves...... drawing on the results of an ethnographic case study of a consultancy house; more spe- cifically, it comprises an exploration of the narrative identity work of consultants as they perform work practice stories of self, work, and the organization negotiating why the work they do is both challenging...... and rewarding. The type of knowledge work explored is characterized by its immaterial nature in the sense that the primary input is the competences, knowledge, and commitment of the consultants and the output is the joy, success, and satisfaction of candidates, clients, and collaborators. The article...

  15. Current titles

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-07-01

    This booklet is published for those interested in current research being conducted at the National Center for Electron Microscopy. The NCEM is a DOE-designated national user facility and is available at no charge to qualified researchers. Access is controlled by an external steering committee. Interested researchers may contact Gretchen Hermes at (510) 486-5006 or address below for a User`s Guide. Copies of available papers can be ordered from: Theda Crawford National Center for Electron Microscopy, Lawrence Berkeley Laboratory, One Cyclotron Rd., MS72, Berkeley, California, USA 94720.

  16. Presynaptic miniature GABAergic currents in developing interneurons.

    Science.gov (United States)

    Trigo, Federico F; Bouhours, Brice; Rostaing, Philippe; Papageorgiou, George; Corrie, John E T; Triller, Antoine; Ogden, David; Marty, Alain

    2010-04-29

    Miniature synaptic currents have long been known to represent random transmitter release under resting conditions, but much remains to be learned about their nature and function in central synapses. In this work, we describe a new class of miniature currents ("preminis") that arise by the autocrine activation of axonal receptors following random vesicular release. Preminis are prominent in gabaergic synapses made by cerebellar interneurons during the development of the molecular layer. Unlike ordinary miniature postsynaptic currents in the same cells, premini frequencies are strongly enhanced by subthreshold depolarization, suggesting that the membrane depolarization they produce belongs to a feedback loop regulating neurotransmitter release. Thus, preminis could guide the formation of the interneuron network by enhancing neurotransmitter release at recently formed synaptic contacts.

  17. Barriers to physical activity among working mothers.

    Science.gov (United States)

    Dombrowski, Jill J

    2011-04-01

    Working mothers experience several barriers to physical activity. If these barriers can be identified by occupational health nurses and they can partner with working mothers to reduce these perceived barriers, the health of these workers can be improved and chronic disease risk prevented. The purpose of this study was to measure the effect of self-regulatory efficacy on physical activity among working mothers and to describe specific barriers to physical activity. The Barriers Specific Self-Efficacy Scale (BARSE) and the Kaiser Physical Activity Survey (KPAS) were used to measure the variables. Self-regulatory efficacy was found to be a strong predictor of physical activity in a diverse sample of working mothers who did not meet current recommendations for physical activity. Occupational health nurses can use these findings to design programs for groups and for counseling individuals.

  18. [work motivation -- assessment instruments and their relevance for medical care].

    Science.gov (United States)

    Fiedler, Rolf G; Ranft, Andreas; Greitemann, Bernhard; Heuft, Gereon

    2005-11-01

    The relevance of work motivation for medical research and healthcare, in particular rehabilitation, is described. Four diagnostic instruments in the German language are introduced which can assess work motivation using a scale system: AVEM, JDS, LMI and FBTM. Their possible application and potential usage for the clinical area are discussed. Apart from the FBTM, none of these instruments can be directly used as a general instrument in a normal medical clinical setting. Finally, a current model for work motivation (compensatory model of work motivation and volition) is presented that contains basis concepts, which are judged as important for future research questions concerning the development of motivation diagnostic instruments.

  19. Advanced Knowledge Work and Stress-related Symptoms : Epidemiology and Clinical Intervention Studies

    OpenAIRE

    Wiholm, Clairy

    2006-01-01

    Well educated knowledge workers are a growing group of the work force. Little research has been conducted on this group regarding possible work-related health symptoms, as well as interventions in order to reduce work-related stress. This thesis describes the current work-related symptoms and potential risk and salutogenic, i.e. protective factors, associated with these symptoms among software and system designers in a high tech company in Sweden. A stress management intervention program was...

  20. Global and Local Approaches Describing Critical Phenomena on the Developing and Developed Financial Markets

    Science.gov (United States)

    Grech, Dariusz

    We define and confront global and local methods to analyze the financial crash-like events on the financial markets from the critical phenomena point of view. These methods are based respectively on the analysis of log-periodicity and on the local fractal properties of financial time series in the vicinity of phase transitions (crashes). The log-periodicity analysis is made in a daily time horizon, for the whole history (1991-2008) of Warsaw Stock Exchange Index (WIG) connected with the largest developing financial market in Europe. We find that crash-like events on the Polish financial market are described better by the log-divergent price model decorated with log-periodic behavior than by the power-law-divergent price model usually discussed in log-periodic scenarios for developed markets. Predictions coming from log-periodicity scenario are verified for all main crashes that took place in WIG history. It is argued that crash predictions within log-periodicity model strongly depend on the amount of data taken to make a fit and therefore are likely to contain huge inaccuracies. Next, this global analysis is confronted with the local fractal description. To do so, we provide calculation of the so-called local (time dependent) Hurst exponent H loc for the WIG time series and for main US stock market indices like DJIA and S&P 500. We point out dependence between the behavior of the local fractal properties of financial time series and the crashes appearance on the financial markets. We conclude that local fractal method seems to work better than the global approach - both for developing and developed markets. The very recent situation on the market, particularly related to the Fed intervention in September 2007 and the situation immediately afterwards is also analyzed within fractal approach. It is shown in this context how the financial market evolves through different phases of fractional Brownian motion. Finally, the current situation on American market is

  1. Is Social Work Evidence-Based? Does Saying So Make It So? Ongoing Challenges in Integrating Research, Practice and Policy

    Science.gov (United States)

    Gambrill, Eileen

    2016-01-01

    The integration of research and practice is of concern in all helping professions. Has social work become an evidence-based profession as some claim? Characteristics of current-day social work are presented that dispute this view, related continuing concerns are suggested, and promising developments (mostly outside social work) are described that…

  2. Current conveyors variants, applications and hardware implementations

    CERN Document Server

    Senani, Raj; Singh, A K

    2015-01-01

    This book serves as a single-source reference to Current Conveyors and their use in modern Analog Circuit Design. The authors describe the various types of current conveyors discovered over the past 45 years, details of all currently available, off-the-shelf integrated circuit current conveyors, and implementations of current conveyors using other, off-the-shelf IC building blocks. Coverage includes prominent bipolar/CMOS/Bi-CMOS architectures of current conveyors, as well as all varieties of starting from third generation current conveyors to universal current conveyors, their implementations and applications. •Describes all commercially available off-the-shelf IC current conveyors, as well as hardware implementations of current conveyors using other off-the-shelf ICs; • Describes numerous variants of current conveyors evolved over the past forty five years; • Describes a number of Bipolar/CMOS/Bi-CMOS architectures of current conveyors, along with their characteristic features; • Includes a comprehe...

  3. Electrical engineering of engineers 2. Alternative current engineering, loci diagrams, transformers, multiphase systems. A lecture and working book for the basic study. 8 ed.; Elektrotechnik fuer Ingenieure 2. Wechselstromtechnik, Ortskurven, Transformator, Mehrphasensysteme. Ein Lehr- und Arbeitsbuch fuer das Grundstudium

    Energy Technology Data Exchange (ETDEWEB)

    Weissgerber, Wilfried

    2013-05-01

    The book under consideration covers the basics and calculation methods of the alternating current technology, the transformer, loci diagrams as well as three-phase systems. The book is dedicated to the students of engineering and natural sciences, electrical engineering, technical informatics and physics at higher institutes of applied sciences, technical colleges, universities and universities of cooperative education.

  4. Paper works

    DEFF Research Database (Denmark)

    Rasmussen, Mattias Borg

    2017-01-01

    of their land and natural resources, but also of labor and territorial sovereignty. This case shows how an Andean campesino community counters such movements by a wide repertoire of legal and social actions that works simultaneously in legal and extra-legal domains. Paper works mediate claims to territorial...

  5. Works Councils

    DEFF Research Database (Denmark)

    Knudsen, Herman Lyhne; Markey, Ray

    2002-01-01

    The article outlines the operation of works councils in Europe and in the context of disscussing their viability in Austalia.......The article outlines the operation of works councils in Europe and in the context of disscussing their viability in Austalia....

  6. Sedentary work

    DEFF Research Database (Denmark)

    Eriksen, Dorte; Rosthøj, Susanne; Burr, Hermann

    2015-01-01

    OBJECTIVE: The aim of this study is to investigate the association between five-year changes in occupational sitting and body mass index (BMI) in working adults. METHODS: We analyzed data from The Danish Work Environment Cohort Study (2005 and 2010, n=3.482). Data on occupational sitting, weight...

  7. Findings on Current AFDC Work Programs and Implications for Pending Legislation. Statement of Joseph F. Delfico, Senior Associate Director, Human Resources Division. Testimony before the Committee on Education and Labor, House of Representatives.

    Science.gov (United States)

    General Accounting Office, Washington, DC. Div. of Human Resources.

    A study of work programs for Aid to Families with Dependent Children (AFDC) recipients in 38 states showed that these programs serve a minority of the recipients. They are providing mainly low cost services minority of the recipients. They are providing low cost services such as job search assistance to those people who need the least help in…

  8. Describing Surfaces.

    Science.gov (United States)

    1985-01-01

    York. Do Carmo , Manfredo P, [1976], Differential Geometry of Curves and Surfaces, Prent- ice-Hall, Englewood Cliffs, NJ. Faugeras, 0. D., et. al, [1982...lightbulb. It is well-known (for exam~ple, do Carmo "" "..-’,.’.V .. .V...i ra I s ; ul ing-.. "’. Figure 11. The helicoid of a single blade. (Reproduced from [do Carmo 1976, Figure 2-27 Page 94]) where m and 1 are assumed

  9. Halo current diagnostic system of experimental advanced superconducting tokamak

    Energy Technology Data Exchange (ETDEWEB)

    Chen, D. L.; Shen, B.; Sun, Y.; Qian, J. P., E-mail: jpqian@ipp.ac.cn; Wang, Y.; Xiao, B. J. [Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031 (China); Granetz, R. S. [MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States)

    2015-10-15

    The design, calibration, and installation of disruption halo current sensors for the Experimental Advanced Superconducting Tokamak are described in this article. All the sensors are Rogowski coils that surround conducting structures, and all the signals are analog integrated. Coils with two different cross-section sizes have been fabricated, and their mutual inductances are calibrated. Sensors have been installed to measure halo currents in several different parts of both the upper divertor (tungsten) and lower divertor (graphite) at several toroidal locations. Initial measurements from disruptions show that the halo current diagnostics are working well.

  10. Halo current diagnostic system of experimental advanced superconducting tokamak

    Science.gov (United States)

    Chen, D. L.; Shen, B.; Granetz, R. S.; Sun, Y.; Qian, J. P.; Wang, Y.; Xiao, B. J.

    2015-10-01

    The design, calibration, and installation of disruption halo current sensors for the Experimental Advanced Superconducting Tokamak are described in this article. All the sensors are Rogowski coils that surround conducting structures, and all the signals are analog integrated. Coils with two different cross-section sizes have been fabricated, and their mutual inductances are calibrated. Sensors have been installed to measure halo currents in several different parts of both the upper divertor (tungsten) and lower divertor (graphite) at several toroidal locations. Initial measurements from disruptions show that the halo current diagnostics are working well.

  11. Work Coordination Engine

    Science.gov (United States)

    Zendejas, Silvino; Bui, Tung; Bui, Bach; Malhotra, Shantanu; Chen, Fannie; Kim, Rachel; Allen, Christopher; Luong, Ivy; Chang, George; Sadaqathulla, Syed

    2009-01-01

    The Work Coordination Engine (WCE) is a Java application integrated into the Service Management Database (SMDB), which coordinates the dispatching and monitoring of a work order system. WCE de-queues work orders from SMDB and orchestrates the dispatching of work to a registered set of software worker applications distributed over a set of local, or remote, heterogeneous computing systems. WCE monitors the execution of work orders once dispatched, and accepts the results of the work order by storing to the SMDB persistent store. The software leverages the use of a relational database, Java Messaging System (JMS), and Web Services using Simple Object Access Protocol (SOAP) technologies to implement an efficient work-order dispatching mechanism capable of coordinating the work of multiple computer servers on various platforms working concurrently on different, or similar, types of data or algorithmic processing. Existing (legacy) applications can be wrapped with a proxy object so that no changes to the application are needed to make them available for integration into the work order system as "workers." WCE automatically reschedules work orders that fail to be executed by one server to a different server if available. From initiation to completion, the system manages the execution state of work orders and workers via a well-defined set of events, states, and actions. It allows for configurable work-order execution timeouts by work-order type. This innovation eliminates a current processing bottleneck by providing a highly scalable, distributed work-order system used to quickly generate products needed by the Deep Space Network (DSN) to support space flight operations. WCE is driven by asynchronous messages delivered via JMS indicating the availability of new work or workers. It runs completely unattended in support of the lights-out operations concept in the DSN.

  12. The Bransfield Gravity Current

    Science.gov (United States)

    Sangrà, Pablo; Stegner, Alexander; Hernández-Arencibia, Mónica; Marrero-Díaz, Ángeles; Salinas, Carolina; Aguiar-González, Borja; Henríquez-Pastene, Cristian; Mouriño-Carballido, Beatriz

    2017-01-01

    Using in situ data and laboratory experiments, we show that the circulation of the Bransfield Current (BC) around the South Shetland Islands (SSI) may be characterized in terms of a propagating buoyant gravity current. First, we describe the SSI hydrography and some drifter trajectories, paying special attention to the recirculation of the BC at the northeastern tip and northern slopes of the SSI. We observed that when the northeastward-flowing BC reaches the northeastern tip of the SSI, it recirculates around an anticyclonic mesoscale eddy that has not previously been reported in this region. Part of this recirculating water then proceeds southwest along the northern SSI shelf break as a narrow baroclinic jet and another part join the Antarctic Circumpolar Current. Consequently, the cross-slope gradients of properties strengthen, and the southern boundary of the Antarctic Circumpolar Current becomes a nearly submesoscale ( 10 km) front. Second, we compare the observations with buoyant gravity current laboratory experiments in an open basin setup where the SSI topographic barrier is represented by a central wall. The resulting circulation of the buoyant gravity current around the wall mirrors our in situ observations. First, a narrow buoyant gravity current flows northeastward along the southern boundary of the wall. Once the head of the buoyant gravity current reaches the tip of the wall, a recirculating anticyclonic vortex is generated, and the buoyant gravity current then proceeds westward along the north side of the wall. This circulation of the BC around the SSI as a buoyant gravity current may contribute to the fertilization of the waters around the SSI, as suggested by previously reported distributions of nutrients and phytoplankton.

  13. Current-crowded carrier confinement in double-heterostructure lasers

    Energy Technology Data Exchange (ETDEWEB)

    Joyce, W.B.

    1980-05-01

    The profiles (spatial distributions) of injected carriers and current within a double-heterostructure stripe-geometry laser are described theoretically in a one-dimensional-flow model. The one-dimensional model is solved exactly and found to yield comparatively simple analytical expresions even when both radiative (nonlinear) and nonradiative recombination are operative. In the case of a shallow proton bombardment or an oxide stripe, two coupled current components leak from under the stripe: an Ohmic current in the P layer and a diffusion current in the active region. As an example, these wasted leakage currents are evaluated in detail and seen to depend strongly upon the laser design. Features of this work not present in previous analytical studies include incorporation of radiative recombination (Bn/sup 2/) and a carrier-concentration-dependent diffusion coefficient, as well as development of a self-consistent solution for the two current components.

  14. Current power plant

    Energy Technology Data Exchange (ETDEWEB)

    Nickell, J.H.

    1979-03-06

    A current power plant is described that includes a shaft mounted turbine wheel for employment in water current, a housing adjacent the impeller and to which the shaft extends, a ramp positioned on the upstream side of the impellar, and a frame on which the turbine wheel is mounted. The frame is mounted by rollers on a tract such that the impeller and frame may be rolled on the tracks inside the housing, whereafter doors are closed, and water around the turbine wheel may be pumped out to facilitate turbine repair.

  15. Work Stress

    OpenAIRE

    Roeters, Anne

    2014-01-01

    Most of us agree that stress is a growing problem within organizations. We hear about the postal workers who had killed fellow employees and supervisors, and then hear that a major cause of tension is at work. Friends tell us that they are stressed due to increased workload and he has to work overtime because the company is restructured. We read the polls that employees complain about the stress in trying to balance family life with the work. Stress is a dynamic condition in which an individu...

  16. 广州萝岗区企业社会工作的现状及对策研究%A Study of the Current Situation of Enterprise Social Work in Luogang Area of Guangzhou and Its Countermeasures

    Institute of Scientific and Technical Information of China (English)

    吕嘉欣

    2015-01-01

    Entering into the accelerated phase of social transition, new and old social problems keep emerging, including the field of enterprises. To develop enterprise social work is an important measure to solve enterprise social problems appearing in the rapid developing process of industrialization and urbanization. The Ministry of Civil Affairs chose Luogang as a pilot area of carrying out enterprise social work and has achieved successful experience in cultivating agencies and exploring localized development models. However, due to the new start of enterprise social work, we will inevitably encounter dilemmas like insufficient government support, enterprise culture restriction, instable staff team, insufficient social work experience and discrete industry resources. These dilemmas should be settled by the joint efforts of the government, enterprises, social work institutes, social workers and community groups, so as to promote the development of enterprise social work.%进入社会转型加速期,包括企业领域,新旧社会问题交叉上演. 发展企业社会工作是解决我国工业化城镇化快速发展在企业领域衍生社会问题的重要举措. 民政部选择在萝岗开展企业社会工作试点,在机构培育、本土化发展模式等方面取得了较好的成绩. 同时,由于企业社工刚起步,难免遇到政府支持不足、企业文化制约、人员队伍不稳定、社工经验不足和行业资源离散等困境,这需要政府、企业、社工机构、社会工作者、社会团体等多方努力,才能促进企业社工的发展.

  17. Age-specific models for evaluating dose and risk from internal exposures to radionuclides: Report of current work of the Metabolism and Dosimetry Research Group, July 1, 1985-June 30, 1987

    Energy Technology Data Exchange (ETDEWEB)

    Leggett, R.W.; Warren, B.P. (eds.)

    1987-09-01

    A projection of the health risk to a population internally exposed to a radionuclide requires explicit or implicit use of demographic, biokinetic, dosimetric, and dose-response models. Exposure guidelines have been based on models for a reference adult with a fixed life span. In this report, we describe recent efforts to develop a comprehensive methodology for estimation of radiogenic risk to individuals and to heterogeneous populations. Emphasis is on age-dependent biokinetics and dosimetry for internal emitters, but consideration also is given to conversion of age-specific doses to estimates of risk using realistic, site-specific demographic models and best available age-specific dose-response functions. We discuss how the methods described here may also improve estimates for the reference adult usually considered in radiation protection. 159 refs.

  18. IPD-Work consortium

    DEFF Research Database (Denmark)

    Kivimäki, Mika; Singh-Manoux, Archana; Virtanen, Marianna

    2015-01-01

    to advance research on associations between work-related psychosocial risk factors and health; (ii) demonstrate as unfounded Choi et al's assertion that IPD-Work has underestimated associations between job strain and health endpoints; these include the dichotomous measurement of job strain, potential......Established in 2008 and comprising over 60 researchers, the IPD-Work (individual-participant data meta-analysis in working populations) consortium is a collaborative research project that uses pre-defined meta-analyses of individual-participant data from multiple cohort studies representing a range......-Work's findings have also generated disagreement as they challenge the importance of job strain as a major target for coronary heart disease (CHD) prevention, this is reflected in the critical discussion paper by Choi et al (1). In this invited reply to Choi et al, we aim to (i) describe how IPD-Work seeks...

  19. Work Practice Characteristics

    DEFF Research Database (Denmark)

    Pors, Jens Kaaber; Simonsen, Jesper

    2003-01-01

    and work practice. To understand these issues a framework of characteristics is identified and termed work practice characteristics to describe important aspects of the hybrid configuration of groupware and situated work practices. Drawing on concepts and work practice studies in the field of computer......Integrating groupware in work practices poses a range of interrelated problems comprising organisational and technological issues. These are complex issues, since they derive from the combined influence of a range of heterogeneous elements and emergent phenomena in the intersection of groupware...... supported cooperative work (CSCW) the paper argues that the interrelations of heterogeneous elements and emergent phenomena arising from the integration of groupware in practice should be made visible from a perspective encompassing both the social and the technical. Two cases from an empirical...

  20. Work Practice Characteristics

    DEFF Research Database (Denmark)

    Pors, Jens Kaaber; Simonsen, Jesper

    2003-01-01

    and work practice. To understand these issues a framework of characteristics is identified and termed work practice characteristics to describe important aspects of the hybrid configuration of groupware and situated work practices. Drawing on concepts and work practice studies in the field of computer......Integrating groupware in work practices poses a range of interrelated problems comprising organisational and technological issues. These are complex issues, since they derive from the combined influence of a range of heterogeneous elements and emergent phenomena in the intersection of groupware...... supported cooperative work (CSCW) the paper argues that the interrelations of heterogeneous elements and emergent phenomena arising from the integration of groupware in practice should be made visible from a perspective encompassing both the social and the technical. Two cases from an empirical...

  1. Medical Team Training: Using Simulation as a Teaching Strategy for Group Work

    Science.gov (United States)

    Moyer, Michael R.; Brown, Rhonda Douglas

    2011-01-01

    Described is an innovative approach currently being used to inspire group work, specifically a medical team training model, referred to as The Simulation Model, which includes as its major components: (1) Prior Training in Group Work of Medical Team Members; (2) Simulation in Teams or Groups; (3) Multidisciplinary Teamwork; (4) Team Leader…

  2. Medical Team Training: Using Simulation as a Teaching Strategy for Group Work

    Science.gov (United States)

    Moyer, Michael R.; Brown, Rhonda Douglas

    2011-01-01

    Described is an innovative approach currently being used to inspire group work, specifically a medical team training model, referred to as The Simulation Model, which includes as its major components: (1) Prior Training in Group Work of Medical Team Members; (2) Simulation in Teams or Groups; (3) Multidisciplinary Teamwork; (4) Team Leader…

  3. Work related shoulder disorders

    DEFF Research Database (Denmark)

    Svendsen, Susanne Wulff; Bonde, Jens Peter; Mathiassen, S.E.

    2004-01-01

    Aims: To determine quantitative exposure-response relations between work with highly elevated arms and supraspinatus tendinitis, shoulder pain with disability, and shoulder pain without disability. Methods: A cross sectional study was conducted in a historical cohort of 1886 males from three...... occupational groups. Exposure measurements were performed for four consecutive working days in a random sample of 72 currently employed subjects. Individual work histories were obtained by questionnaire and register data. Health status was ascertained by physical examination blinded towards exposure...... and symptoms. Data were analysed by generalised estimating equation and multiple logistic regression with adjustment for potential confounders. Results: For current upper arm elevation above 90°, a duration increment of 1% of the daily working hours was associated with odds ratios of 1.23 (95% CI 1.10 to 1...

  4. 肿瘤科护士心理健康现状及压力源调查%SURVEYS OF CURRENT SITUATION OF MENTAL HEALTH AND SOURCES OF STRESS OF NURSES WORKING IN DEPARTMENT OF ONCOLOGY

    Institute of Scientific and Technical Information of China (English)

    孙菲; 温肇霞

    2013-01-01

    目的 了解肿瘤科护士的心理健康状况和主要心理问题,找出影响其心理健康的主要工作压力源.方法 使用自编的人口统计学资料问卷、肿瘤科护士工作压力源问卷和症状自评量表(SCL-90),对青岛市4所三级甲等医院的100名肿瘤科护士进行调查.结果 肿瘤科护士处于中等压力水平.躯体化、强迫、抑郁、焦虑、敌对、恐怖、偏执等因子分及总分均高于中国常模,差异有显著性(t=2.44~9.03,P<0.05、0.01).肿瘤科护士工作压力源各维度压力程度排序依次为:社会因素和职业发展、专业技能方面、工作环境和工作性质、病人及家属方面、肿瘤专科护理问题、人际关系方面.肿瘤科护士工作压力源与心理健康状况的躯体化、强迫、抑郁、焦虑等因子呈显著正相关(r=0.24~0.50,P<0.05).结论 工作压力是影响肿瘤科护士心理健康的重要因素,采取措施减轻肿瘤科护士工作压力,改善肿瘤科护士心理健康势在必行.%Objective To investigate psychological health status and main problems of nurses working in department of oncology, and find out the main sources of working pressure. Methods The self-designed questionnaires on demographic data and working pressure source of nurses working in department of oncology, as well as SCL-90 were used to investigate 100 nurses of four tertiary hospitals in Qingdao. Results The pressure of nurses surveyed were at moderate level. The score of somatization, compulsion, depression, anxiety, hostility, terror, and paranoid and total score were higher than norm in China, and the differences among them were significant (t — 2. 44 — 9. 03,P<0. 05,0. 01). The intensity of work-related stress upon the nurses was in the order as follows: social factors and career development, professional skill, work environment and nature, the pressure came from patients and their families, tumor-related specific care, and interpersonal

  5. CITA works

    DEFF Research Database (Denmark)

    Ramsgaard Thomsen, Mette; Tamke, Martin; Ayres, Phil;

    2015-01-01

    CITA works documents over 40 projects, events and research collaborations conducted between 2005 and 2014 by the Centre for Information Technology and Architecture (CITA). Through individual project descriptions accompanied by photographic documentation and design drawings, CITA works provides...... readers with insights into our design-led practice-based architectural research which queries how computation challenges the way we think, design and build architecture. With essays by Professor Mette Ramsgaard Thomsen (Head of CITA), and Dr. Jane Burry (Head of the Spatial Information Architecture...... Laboratory, RMIT) the work is contextualised within the field of digital architectural design practice. These essays also identify the emerging questions and maturing methods that continue to inform CITA’s research within this territory. CITA works marks the first 10 years of our research effort...

  6. The Welfare to Work Transition in the United States: Implications for Work-Related Learning

    Science.gov (United States)

    Fisher, James C.; Martin, Larry G.

    2000-11-01

    This paper summarizes the legislation upon which the current welfare-to-work transition in the United States is based and describes characteristics of the former welfare population from which various tiers of employment options have emerged: unsubsidized-employed workers, subsidized-employed workers, subsidized-unemployed recipients, and unsubsidized-unemployed individuals. It also discusses current program emphases, and presents a format for directions for future program development which includes academic programs, situated cognition programs, integrated literacy/occupational skills programs, and integrated literacy/soft skills training.

  7. 浅析生物科学专业毕业实习的现状及对策%The Current Situation and Countermeasures for Gradua-tion Field Work of Biological Sciences Major

    Institute of Scientific and Technical Information of China (English)

    李华; 薛瑞丽

    2015-01-01

    Graduation field work is an important part of practical teaching. Biological sciences is a quite theoretical major, there-fore, its graduation field work is different from other practical ma-jors. In this report, the problems of graduate practice of biological sciences major were introduced from the view of schools, teachers and students, and several opinions on improving these problems were suggested, such as adjusting the time and manner of gradu-ation field work, setting up a managing group special for graduate practice, regulating the responsibility of supervisors, perfecting and implementing the accountability standards, , hoping to improve the quality of graduation practice.%毕业实习是重要的实践教学。生物科学是一个偏理性的专业,其毕业实习有别于其他应用性较强的专业。本文从学校、老师及学生的角度分析了生物科学专业毕业实习过程中存在的问题,并对相应问题提出对策建议,如调整实习时间和形式、组建专门实习管理小组、规范导师责任制、完善和落实考核制度等,以期达到提高实习质量的目的。

  8. Current Situation of Household Registration Management Work of Students in Higher Vocational Colleges and Countermeasures%高职院校学生户籍管理工作现状与对策研究

    Institute of Scientific and Technical Information of China (English)

    朱萍

    2014-01-01

    高职院校学生户籍管理是学校教育教学管理工作的重要组成部分,是维护学校安全稳定的一项基础性工作。随着我国高职院校招生规模的不断扩大,学生户籍管理暴露出诸多问题,探讨高职院学生户籍档案工作,加强学生户籍管理,健全学生户籍管理制度,已成为高职院校学生户籍管理工作的重中之重。%The vocational college students’ household registration is important part of school edu-cation teaching management ,is one of the foundations of security and stability in maintenance school work .With the expanding enrollment in higher vocational colleges in our country ,students household registration management exposed many problems on higher vocational college students ’ household regis-tration records work , and improve their household registration management , improve the students ’ household registration management system , has become a household registration management work of students in higher vocational college ’s top priority .

  9. The Shape of Solar Cycles Described by a Simplified Binary Mixture of Gaussian Functions

    Science.gov (United States)

    Li, F. Y.; Xiang, N. B.; Kong, D. F.; Xie, J. L.

    2017-01-01

    Sunspot cycles usually present a double-peak structure. This work is devoted to using a function to describe the shape of sunspot cycles, including bimodal cycles, and we find that the shape of sunspot cycles can be described by a binary mixture of Gaussian functions with six parameters, two amplitudes, two gradients of curve, and two rising times, and the parameters could be reduced to three. The fitting result of this binary mixture of Gaussian functions is compared with some other functions used previously in the literature, and this function works pretty well, especially at cycle peaks. It is worth mentioning that the function can describe well the shape of those sunspot cycles that show double peaks, and it is superior to the binary mixture of the Laplace functions that was once utilized. The Solar Influences Data Analysis Center, on behalf of the World Data Center, recently issued a new version (version 2) of sunspot number. The characteristics of sunspot cycles are investigated, based on the function description of the new version.

  10. Parton Distributions Working Group

    Energy Technology Data Exchange (ETDEWEB)

    de Barbaro, L.; Keller, S. A.; Kuhlmann, S.; Schellman, H.; Tung, W.-K.

    2000-07-20

    This report summarizes the activities of the Parton Distributions Working Group of the QCD and Weak Boson Physics workshop held in preparation for Run II at the Fermilab Tevatron. The main focus of this working group was to investigate the different issues associated with the development of quantitative tools to estimate parton distribution functions uncertainties. In the conclusion, the authors introduce a Manifesto that describes an optimal method for reporting data.

  11. Survey Analysis and Solutions towards the Current State of Medical Personnel ’s Work Stress%医务人员工作压力现状的调查分析及应对措施

    Institute of Scientific and Technical Information of China (English)

    李能江; 李豫川; 周皓岚; 熊亚军

    2014-01-01

    目的:对医务人员工作压力现状进行调查研究,提出缓解医务人员工作压力的有效措施,为制订有关方针政策或制度规则提供依据。方法:在文献研究的基础上,以问卷调查与访谈、理论研究与现场调查相结合等方式,运用中文版知觉压力量表(CPSS)对四川省13家市、县(区)、乡镇医疗机构413名医务人员的工作压力进行专项调查与研究,并运用SPSS19.0统计软件进行分析,了解医务人员工作压力现状并制定应对措施。结果:61.74%的医务人员处于健康危险压力状态,其中不同职业(岗位)、不同工龄、不同子女状况和经济状况的医务人员工作压力有显著性差异(P<0.05)。结论:医务人员工作压力较大,值得社会及医疗卫生管理者重视与关注,应当从社会、医院、个人等层面采取更多的应对措施。%Objective :Making an investigate analysis on present status of medical personnel’s working pressure and then put forward some effective measures for releasing medical personnel ’s working pressure ,and provide a basis for formulating related policies and guidelines or institutional rules .Methods:On the basis of document research and through the combination of questionnaire survey and interviews ,the theoretical research and the field survey etc ,the author makes an special investigation and analysis for the working pressure of 413 medical personnel who come from 13 medical institutions among city ,country(district) ,and rural place of Sichuan province by using Chinese vision(CPSS) , and analyzes it through the SPSS19 .0 statistical software and grasps the present situation of medical personnel ’s work-ing pressure and then makes corresponding measures .Results:61 .74% of medical personnel are in the healthy risk pres-sure status .Among them the working pressure of medical personnel with different occupations (positions) ,different age ,and

  12. Efficient computation of GW energy level corrections for molecules described in a plane wave basis

    Science.gov (United States)

    Rousseau, Bruno; Laflamme Janssen, Jonathan; Côté, Michel

    2013-03-01

    An efficient computational approach is presented to compute the ionisation energy and quasiparticle band gap at the level of the GW approximation when the Hilbert space is described in terms of plane waves. The method relies on ab initio calculations as a starting point. Then, the use of the Sternheimer equation eliminates slowly convergent sums on conduction states. Further, the Lanczos method is used to efficiently extract the most important eigenstates of the dielectric operator. This approach avoids the explicit computation of matrix elements of the dielectric operator in the plane wave basis, a crippling bottleneck of the brute force approach. The method is initially applied to organic molecules of current interest in the field of organic photovoltaics. Given the completeness of the plane wave basis, systematic convergence studies can be conducted. Furthermore, the method can readily be extended to describe polymers, which are also of interest for photovoltaic applications, but remain a significant computational challenge for methods based on localized basis sets.

  13. Paid work and unpaid work

    DEFF Research Database (Denmark)

    Bonke, Jens

    Time-use information is preferably obtained from diaries, as this method is considered more reliable than information from questionnaires. The diary-technique seems to be unique in catching the rhythm of every day life and thereby the structuring of work and leisure during a well......-questions are asked about the time spent on paid work and unpaid/household work. The advantage of the latter technique is that it can easily be integrated into surveys. Thus the American National Survey of Families and Households (NSFH) already contains two waves, and a new wave for 2001-2002, which allows...

  14. O trabalho de enfermagem em saúde mental: contradições e potencialidades atuais El trabajo de enfermería en salud mental: contradicciones y potencialidades actuales Mental health nursing work: contradictions and current potentialities

    Directory of Open Access Journals (Sweden)

    Alice G. Bottaro de Oliveira

    2003-06-01

    Full Text Available Este estudo teve por objetivo identificar contradições e desafios que se apresentam atualmente no trabalho de enfermagem em saúde mental, no contexto da Reforma Psiquiátrica, tendo por referência a construção histórico-social desse processo de trabalho. A Reforma Psiquiátrica pressupõe um novo desenho de objeto e instrumentos de trabalho, que são ainda pouco visíveis na prática dos enfermeiros, e a possibilidade de se alcançar a condição de sujeito-cidadão para o portador de sofrimento mental - modo de ser e finalidade do trabalho - que está diretamente relacionada à consciência de sujeito-cidadão do trabalhador de enfermagem.Este trabajo tuvo como objetivo identificar las contradicciones y posibilidades que se presentan actualmente en el trabajo de enfermería en salud mental, en el proceso de la Reforma Psiquiátrica, basado en la construcción histórico-social de este proceso de trabajo. Se destaca que la Reforma Psiquiátrica presenta un nuevo diseño de objeto y de instrumento de trabajo que casi no se observa en el quehacer del enfermero. Sostenemos que la posibilidad de alcanzar la condición de sujeto-ciudadano del ser humano en sufrimiento psíquico, se relaciona directamente con la concientización del enfermero, como sujeto-trabajador-ciudadano.This study aimed to identify contradictions and challenges that are present nowadays in mental health nursing work, in the context of the Psychiatric Reform, on the basis of the historical-social construction of this working process. The Psychiatric Reform presupposes a new design of work purpose and instruments, which still have little visibility in nursing practice, and the possibility for the person in mental suffering to achieve the subject-citizen condition - way of being and work purpose - which is directly related with the subject-citizen awareness of the nursing worker.

  15. Misestimation of temperature when applying Maxwellian distributions to space plasmas described by kappa distributions

    CERN Document Server

    Nicolaou, Georgios

    2016-01-01

    This paper presents the misestimation of temperature when observations from a kappa distributed plasma are analyzed as a Maxwellian. One common method to calculate the space plasma parameters is by fitting the observed distributions using known analytical forms. More often, the distribution function is included in a forward model of the instrument's response, which is used to reproduce the observed energy spectrograms for a given set of plasma parameters. In both cases, the modeled plasma distribution fits the measurements to estimate the plasma parameters. The distribution function is often considered to be Maxwellian even though in many cases the plasma is better described by a kappa distribution. In this work we show that if the plasma is described by a kappa distribution, the derived temperature assuming Maxwell distribution can be significantly off. More specifically, we derive the plasma temperature by fitting a Maxwell distribution to pseudo-data produced by a kappa distribution, and then examine the d...

  16. [Neurological aspects described in The treasure of medicines for all illnesses by Gregorio López].

    Science.gov (United States)

    Carod-Artal, F J; Vázquez-Cabrera, C B

    Latin American medicine in the 16th century produced the first collections of herbs with native plants from the New World. Treatises on popular therapies appeared, which included gallenic remedies as well as incorporating autochthonous plants. We review the main neurological diseases and their treatments described in The Treasure of Medicines for All Illnesses by Gregorio Lopez (1542-1596). Some critics claim that his work was an enumeration of empirical prescriptions, sometimes with a magico-religious influence, which was extended in successive reprints. Yet, this manuscript is probably the first treatise on therapeutics written by a European in the New World to describe the native remedies employed in the treatment of diseases. In the section entitled Remedies in alphabetical order the following neurological ailments and appropriate remedies to treat them are described: abscess, apoplexy, brain, chilling, cramp, gota coral or epilepsy, headache, melancholy, memory, migraine, nerves, palsy, paralysis, sciatica, stupor and vertigo. The list of diseases is very complete and includes syndromes ranging from fevers, colics and bruises to phthisis, scabs or burns. The copy of the manuscript in the Vatican contains a final section on Indian medicines, which includes a list of medicinal plants used at that time, with the names given in Nahuatl language. Headaches, epilepsy and conditions affecting the peripheral nerves were the neurological pathologies that were described at greatest length in The Treasure of Medicines for All Illnesses, and for which a greater number of natural prescriptions were compiled.

  17. Exploring the use of fuzzy logic models to describe the relation between SBP and RR values.

    Science.gov (United States)

    Gouveia, Sónia; Brás, Susana

    2012-01-01

    In this work, fuzzy logic based models are used to describe the relation between systolic blood pressure (SBP) and tachogram (RR) values as a function of the SBP level. The applicability of these methods is tested using real data in Lying (L) and Standing (S) conditions and generated surrogate data. The results indicate that fuzzy models exhibit a similar performance in both conditions, and their performance is significantly higher with real data than with surrogate data. These results point out the potential of a fuzzy logic approach to model properly the relation between SBP and RR values. As a future work, it remains to assess the clinical impact of these findings and inherent repercussion on the estimation of time domain baroreflex sensitivity indices.

  18. Quasistatic limit of the strong-field approximation describing atoms in intense laser fields: Circular polarization

    CERN Document Server

    Bauer, J H

    2010-01-01

    In the recent work of Vanne and Saenz [Phys. Rev. A 75, 063403 (2007)] the quasistatic limit of the velocity gauge strong-field approximation describing the ionization rate of atomic or molecular systems exposed to linearly polarized laser fields was derived. It was shown that in the low-frequency limit the ionization rate is proportional to the laser frequency (for a constant intensity of the laser field). In the present work I show that for circularly polarized laser fields the ionization rate is proportional to higher powers of the laser frequency for hydrogenic atoms. The new analytical expressions for asymptotic ionization rates (which become accurate in the quasistatic limit) contain no summations over multiphoton contributions. For very low laser frequencies (optical or infrared), these expressions usually remain with an order-of-magnitude agreement with the velocity gauge strong-field approximation.

  19. Transitivity Analysis on Stylistic Features:A Comparative Study of Two Texts Describing the West Lake

    Institute of Scientific and Technical Information of China (English)

    QU Jing-hua

    2016-01-01

    Transitivity is regarded as an effective methodology for analyzing literary works. This paper based on M. A. K. Halli-day’s transitivity system, analyzed two different texts describing the West Lake. One is from the wikipedia, the other is a tourist material from the website named AT-China. This paper demonstrates that for one thing, transitivity system can be used in analyz-ing relations between implicit or not obvious conflicting parties. For another, transitivity system manifests that there are some different stylistic features in texts of different styles, such as different participants, material processes, sentence patterns, literari-ness, etc.

  20. Accuracy Assessment for Cad Modeling of Freeform Surface Described by Equation

    Directory of Open Access Journals (Sweden)

    Golba Grzegorz

    2015-06-01

    Full Text Available This paper presents the results of comparative analysis of modeling accuracy the freeform surface constructed by using a variety of algorithms for surface modeling. Also determined the accuracy of mapping the theoretical freeform surface described by mathematical equation. To model surface objects used: SolidWorks 2012, CATIA v5 and Geomagic Studio 12. During the design process of CAD models were used: profile curves, fitting parametric surface and polygonal mesh. To assess the accuracy of the CAD models used Geomagic Qualify 12. On the basis of analyse defined the scope of application of each modeling techniques depending on the nature of the constructed object.

  1. Working Collaboratively

    DEFF Research Database (Denmark)

    Holder, Anna; Lovett, George

    2009-01-01

    Working collaboratively is arguably an essential skill in architectural practice as the complexity of contemporary projects involves multiple agents in the conception, construction and use of architecture. This has been emphasised by recent government rhetoric. Mass collaboration has been...... identified as a transformative global force of the last decade, most notably in knowledge and information publishing, communication and creation. This paper presents a structured conversation on changing understandings of collaboration, and the realities of collaborative methodology in architectural work....... Ideas of the platforms and structures necessary to support ‘creative’ collaborations are advanced and tested, and a vocabulary of key terms is developed. The conversation extends to reflect on the role of the architecture profession in supporting or enabling collaboration in architectural works....

  2. Tendencias actuales en el Trabajo Social uruguayo: hacia un campo profesional envejecido? Tendências atuais no Serviço Social uruguaio: rumo a um campo professional envelhecido? Current trends in Uruguayan Social Work: an aging profession?

    Directory of Open Access Journals (Sweden)

    Mónica De Martino Bermúdez

    2006-12-01

    estudantes de Serviço Social, as autoras mapeiam problemáticas e insinuam certas linhas de interpretação.This article synthesizes some reflections about the future of Social Work as a profession in Uruguay, based on the identification of certain problems that are of concern to the authors. Although they work in different professional activities and at different educational levels, the three share a certain perspective about tendencies observed in Social Work in Uruguay and believe they have some responses. Based on a dialog with the Sociology of Professions and theories of Pierre Bourdieu, the authors demonstrate that Social Work as a "field" as understood by this author, is clearly in an aging process that is expressed in a professional "habitus" that has little harmony with its social-historical time. In light of questions about the responsibility of the academic sector in the reproduction of this "habitus" and about the challenges to the profile of the students of Social Work, the authors map analyses and propose certain lines of interpretation.

  3. Models of current sintering

    Science.gov (United States)

    Angst, Sebastian; Engelke, Lukas; Winterer, Markus; Wolf, Dietrich E.

    2017-06-01

    Densification of (semi-)conducting particle agglomerates with the help of an electrical current is much faster and more energy efficient than traditional thermal sintering or powder compression. Therefore, this method becomes more and more common among experimentalists, engineers, and in industry. The mechanisms at work at the particle scale are highly complex because of the mutual feedback between current and pore structure. This paper extends previous modelling approaches in order to study mixtures of particles of two different materials. In addition to the delivery of Joule heat throughout the sample, especially in current bottlenecks, thermoelectric effects must be taken into account. They lead to segregation or spatial correlations in the particle arrangement. Various model extensions are possible and will be discussed.

  4. Ubiquitous Working Environments

    Science.gov (United States)

    Jansson, Carl Gustaf

    This chapter presents the Ubiquitous Working Environments, a vision for the work environments of the future and how this vision is manifested in current experimental environments and projects at KTH. Building upon the Ubiquitous Computing paradigm, our research targets environments, which support collaborating mobile workers in a seamless way, providing work support anywhere and anytime. In our design work so far, we have been particularly interested in the following three design aspects: First, context aware, proactive, and adaptive services; second, ad hoc configuration and synchronization of available resources, including both devices and services; third, new ways of sharing and using resources in a work environment. The systems we design comprise both devices, services, and their interfaces.

  5. Working Group Report: Neutrinos

    Energy Technology Data Exchange (ETDEWEB)

    de Gouvea, A.; Pitts, K.; Scholberg, K.; Zeller, G. P. [et al.

    2013-10-16

    This document represents the response of the Intensity Frontier Neutrino Working Group to the Snowmass charge. We summarize the current status of neutrino physics and identify many exciting future opportunities for studying the properties of neutrinos and for addressing important physics and astrophysics questions with neutrinos.

  6. Academic Work and Performance

    Science.gov (United States)

    Gunter, Helen M.

    2012-01-01

    Reading current accounts of higher education demonstrates the flux and damage of rapid neoliberal changes to the type and conduct of academic work. Opening the Times Higher Education magazine on the 28 April 2011 shows articles about cuts in staffing and undergraduate provision in England, concerns about the quality of for-profit higher education…

  7. Parton Distributions Working Group

    CERN Document Server

    de Barbaro, Lucy; Brock, R.; Casey, D.; Demina, R.; Giele, W.T.; Hirosky, R.; Huston, J.; Kalk, J.; Keller, S.A.; Klasen, M.; Kosower, D.A.; Kramer, M.; Kretzer, S.; Kuhlmann, S.; Martin, R.; Olness, Fredrick I.; Plehn, T.; Pumplin, J.; Scalise, R.J.; Schellman, H.; Smith, J.; Soper, D.E.; Sterman, George F.; Stump, D.; Tung, W.K.; Varelas, N.; Vogelsang, W.; Yang, Un-Ki

    2000-01-01

    The main focus of this working group was to investigate the different issues associated with the development of quantitative tools to estimate parton distribution functions uncertainties. In the conclusion, we introduce a "Manifesto" that describes an optimal method for reporting data.

  8. The Work Ethic Game.

    Science.gov (United States)

    Nelson, Kate

    1992-01-01

    Describes the development of "The Work Ethic Game" that focuses on integrity in the workplace. Explains that the game is divided into three categories: legal, judgment, and policy issues. Discusses different personality types in the typical employee population. Includes possibilities for use at different education levels. (DK)

  9. Work sampling

    OpenAIRE

    Salas Bacalla, julio; FII-UNMSM

    2014-01-01

    Work sampling is a method of indirect measurement, which means instantaneous observations, to determine the amount of uptime or downtime in a production process El muestreo de trabajo es un método de medición indirecto, que mediante observaciones instantaneas, permite determinar la cantidad de tiempo en actividad o inactividad en un proceso productivo

  10. Hard work

    NARCIS (Netherlands)

    Myra Keizer; Saskia Keuzenkamp

    2011-01-01

    Original title: Moeilijk werken More than one in ten women say they are not available for the labour market because of health complaints. That is almost twice as many as the figure for men. Migrant women, in particular, often cite health as a reason for not being able to work. Are there

  11. Demolition work

    CERN Document Server

    2004-01-01

    Because of demolition work inside Bldg. 251, two containers will be placed on the route Démocrite. For security reasons, the part of this road in front of barrack 553 will be closed to circulation from 5 to 12 November. Thank you, in advance for your understanding. PH-SMI

  12. Road works

    CERN Multimedia

    GS Department

    2010-01-01

    From Monday 11 October until Friday 29 October 2010, the flow of traffic will be disrupted by road works at the roundabout in front of Restaurant No. 2; The number of spaces available in the car park in front of Rest. No. 2 will be reduced. Thank you for your understanding during this period. GS/SEM Group

  13. Working Parents

    Science.gov (United States)

    ... on your time and energy. For example, the family can work together to clean up the kitchen after dinner; with everyone's help it will get done much quicker and free up some time for you in the evening. Do the same on the ... build family cohesiveness while finishing the job faster, thus leaving ...

  14. Construction work

    CERN Multimedia

    2004-01-01

    Construction work on building 179 will start on the 16th February 2004 and continue until November 2004. The road between buildings 179 and 158 will temporarily become a one way street from Route Democrite towards building 7. The parking places between buildings 179 and 7 will become obsolete. The ISOLDE collaboration would like to apologize for any inconveniences.

  15. Study on current status of work-related musculoskeletal disorders evaluation%工作有关的肌肉骨骼疾患评价的现况研究

    Institute of Scientific and Technical Information of China (English)

    张磊; 黄春萍; 兰亚佳; 王绵珍; 舒丽萍; 张文辉; 虞龙; 姚胜才; 廖云华

    2014-01-01

    Objective To characterize the distribution of work-related musculoskeletal disorders (WRMD) among the occupational population.Methods A total of 1686 people of various occupations were recruited with random cluster sampling.Standardized Nordic questionnaires for the analysis of musculoskeletal systems were used to evaluate WRMD at the neck,shoulder,or lower back in the past one year.The annual prevalence of WRMD was determined.Difference analysis was performed with t-test,ANOVA,or chi-square test.The relationship between personal characteristics and WRMD was analyzed by unconditional logistic regression.Results (1) WRMD were most frequently observed at the neck,followed by the lower back,and was least observed at the shoulder (P<0.05).The prevalence of WRMD among mental workers was significantly higher than those among physical workers and mental-physical workers (P<0.01).The prevalence of WRMD among female workers was significantly higher than that among male workers (P<0.05).(2) In general,the prevalence of WRMD significantly rose with the increases in age (<30,30~,40~,and ≥50 years) or working years (<10,10~,and ≥20 years) (P<0.05).(3) In the face of sickness or injury,physical workers and mental workers showed a relatively high absence rate but a relatively low medical visiting rate (13.05%).(4) Unconditional logistic regression analysis showed that mental work,gender,and working year were the main influential factors for WRMD among workers.Conclusion Workers of different types of occupation,genders,ages,and working years have different risks of WRMD at the neck,shoulder,and lower back.%目的 描述职业人群工作有关的肌肉骨骼疾患(work-related musculoskeletal disorders,WRMD)的分布特征.方法 采用整群随机抽样方法抽取行政管理、教育等不同职业的在职职工1 686人作为研究样本.采用标准化北欧国家肌肉骨骼系统症状分析量表,对研究对象最近1年颈部、肩部、下背部

  16. Image Theory's counting rule in clinical decision making: Does it describe how clinicians make patient-specific forecasts?

    Directory of Open Access Journals (Sweden)

    Melissa Garman

    2012-05-01

    Full Text Available The field of clinical decision making is polarized by two predominate views. One holds that treatment recommendations should conform with guidelines; the other emphasizes clinical expertise in reaching case-specific judgments. Previous work developed a test for a proposed alternative, that clinical judgment should systematically incorporate both general knowledge and patient-specific information. The test was derived from image theory's two phase-account of decision making and its ``simple counting rule'', which describes how possible courses of action are pre-screened for compatibility with standards and values. The current paper applies this rule to clinical forecasting, where practitioners indicate how likely a specific patient will respond favorably to a recommended treatment. Psychiatric trainees evaluated eight case vignettes that exhibited from 0 to 3 incompatible attributes. They made two forecasts, one based on a guideline recommendation, the other based on their own alternative. Both forecasts were predicted by equally- and unequally-weighted counting rules. Unequal weighting provided a better fit and exhibited a clearer rejection threshold, or point at which forecasts are not diminished by additional incompatibilities. The hypothesis that missing information is treated as an incompatibility was not confirmed. There was evidence that the rejection threshold was influenced by clinician preference. Results suggests that guidelines may have a de-biasing influence on clinical judgment. Subject to limitations pertaining to the subject sample and population, clinical paradigm, guideline, and study procedure, the data support the use of a compatibility test to describe how clinicians make patient-specific forecasts.

  17. Work and minor work contracts

    CERN Document Server

    1999-01-01

    The Work and Minor Work contracts are all of the result-oriented type. The work is specified by CERN and the contractor is given full responsibility for its performance. The contracts are thus very similar to supply contracts. The re-tendering of the existing contracts is almost complete, except for some building maintenance contracts. A new cycle of re-tendering for some activities will be launched in the next twelve months. The total estimated expenditure in the year 2000 for the contracts referred to in this document is 27 750 000 Swiss francs at 1999 prices. The Finance Committee is invited: - to approve the proposed expenditure for the extension of contracts for which the estimated amount for the year 2000 exceeds 750 000 Swiss francs, namely those under references 1, 2, 3, 5, 7, 8, 9 and 23, highlighted in Table I; - to take note that all Work and Minor Work contracts have been tendered since 1 January 1994, except the small contracts shown under references 12 and 16 in Table I; - to take note that the ...

  18. Work family conflict in its relations to perceived working situation and work engagement.

    Science.gov (United States)

    Mache, Stefanie; Bernburg, Monika; Groneberg, David A; Klapp, Burghard F; Danzer, Gerhard

    2016-02-15

    These days physicians' work is characterized by an increase in economic demands, pressure and challenges in establishing a balance between work and family life. The current study investigates the relationship between physicians' job demands and resources, perceived job stress, work-family conflict, work engagement and job satisfaction. 564 clinicians specialising in different medical fields participated in the cross-sectional study. Self-administered questionnaires, including the COPSOQ and the UWES- Scale were administered. Our results illustrated significant relationships between physicians' work engagement and their job satisfaction as well as between job stress and work family conflict. Moreover, perceived job stress moderated the effect of high job demands on work family conflict. In addition, significant gender differences have been found in perceived stress levels, work family conflict and work engagement. This study proves and verified associations between work engagement, work-family conflict, job demands and resources that may influence employees' satisfaction. Implications for both working physicians and hospital management are given.

  19. Figuration work

    DEFF Research Database (Denmark)

    Nielsen, Gritt B.

    What role should students take in shaping their education, their university, and the wider society? These questions have assumed new importance in recent years as universities are reformed to become competitive in the “global knowledge economy.” With Denmark as the prism, this book shows how nego...... approach to studying policy processes and opens a timely discussion to reflect on and question the kinds of future citizens who will emerge from current reforms....

  20. Figuration work

    DEFF Research Database (Denmark)

    Nielsen, Gritt B.

    What role should students take in shaping their education, their university, and the wider society? These questions have assumed new importance in recent years as universities are reformed to become competitive in the “global knowledge economy.” With Denmark as the prism, this book shows how nego...... approach to studying policy processes and opens a timely discussion to reflect on and question the kinds of future citizens who will emerge from current reforms....

  1. Recent work and results on sparrow project

    Energy Technology Data Exchange (ETDEWEB)

    Harvey, Neal R [Los Alamos National Laboratory

    2010-12-23

    This briefing describes recent work undertaken on the Sparrow Project and results of this work. It describes experiments comparing the use of Genie with 2 classes with 3 classes for the problem of ship delineation. It also describes some preliminary work in the area of the optimization of segmentation techniques.

  2. A Monotonic Precise Current DAC for Sensor Applications

    Directory of Open Access Journals (Sweden)

    P. Horsky

    2008-12-01

    Full Text Available In this paper a 17 bit monotonic precise current DAC for sensor applications is described. It is working in a harsh automotive environment in a wide temperature range with high output voltage swing and low current consumption. To guarantee monotonicity current division and segmentation techniques are used. To improve the output impedance, the accuracy and the voltage compliance of the DAC, two active cascoding loops and one follower loop are used. The resolution of the DAC is further increased by applying pulse width modulation to one fine LSB current. To achieve low power consumption unused coarse current sources are switched off. Several second order technological effects influencing final performance and circuits dealing with them are discussed.

  3. The Current Situation of College Graduates Working as Village Officials and Related Reflections:Taking Feidong County of Anhui Province as an Example%大学生“村官”任职现状与思考

    Institute of Scientific and Technical Information of China (English)

    崔玉凤

    2011-01-01

    College students chose to be village officials mainly because of employment pressure.Most of them took a position as an assistant for village secretary or director in the grass root,and they had a good effect on speeding new country building.However,there were also some problems: few stay long,roles are obscure,experience and ability are insufficient,and their future is blurred.It is suggested that students at college should make good plans for their future careers and love the building of the new country.College graduates working as village officials should keep their mind on their work,have confidence and try their best to serve the country.There should be strict entering systems and perfect ensuring systems.Related departments should provide training according to the real needs of the country and build entrepreneurship and communication stages for those village officials.%大学生应聘村官主要迫于就业压力,多数在基层担任村支书、主任助理、书记助理等助理性职位,对加快新农村建设具有积极作用,但存在"留得住"的少、角色定位模糊、经验能力欠缺、发展前途困惑等问题。建议在校大学生要做好职业发展规划,热爱农村建设;大学生村官要安心、有信心,尽一切努力干好;大学生村官要有严格的准入制度和良好的保障制度,根据农村实际需要对大学生村官培训,搭建大学生村官创业与交流平台。

  4. Current practice in laboratory diagnostics of autoimmune diseases in Croatia. 
Survey of the Working group for laboratory diagnostics of autoimmune diseases of the Croatian Society of Medical Biochemistry and Laboratory Medicine

    Science.gov (United States)

    Kuna, Andrea Tešija; Đerek, Lovorka; Kozmar, Ana; Drvar, Vedrana

    2016-01-01

    Introduction With the trend of increasing incidence of autoimmune diseases, laboratories are faced with exponential growth of the requests for tests relating the diagnosis of these diseases. Unfortunately, the lack of laboratory personnel experienced in this specific discipline of laboratory diagnostic, as well as an unawareness of a method limitation often results in confusion for clinicians. The aim was to gain insight into number and type of Croatian laboratories that perform humoral diagnostics with the final goal to improve and harmonize laboratory diagnostics of autoimmune diseases in Croatia. Materials and methods In order to get insight into current laboratory practice two questionnaires, consisting of 42 questions in total, were created. Surveys were conducted using SurveyMonkey application and were sent to 88 medical biochemistry laboratories in Croatia for the first survey. Out of 33 laboratories that declared to perform diagnostic from the scope, 19 were selected for the second survey based on the tests they pleaded to perform. The survey comprised questions regarding autoantibody hallmarks of systemic autoimmune diseases while regarding organ-specific autoimmune diseases was limited to diseases of liver, gastrointestinal and nervous system. Results Response rate was high with 80 / 88 (91%) laboratories which answered the first questionnaire, and 19 / 19 (1.0) for the second questionnaire. Obtained results of surveys indicate high heterogeneity in the performance of autoantibody testing among laboratories in Croatia. Conclusions Results indicate the need of creating recommendations and algorithms in order to harmonize the approach to laboratory diagnostics of autoimmune diseases in Croatia.

  5. RESUMING WORK

    CERN Multimedia

    Service Médical

    2000-01-01

    In application of the Staff Rules and Regulations, every member of the CERN personnel is required to undergo a medical examination on resuming work after sick leave: - if the medical absence has been for 21 calendar days or longer, - if absent more than 48 hours due to professional accident. It is incumbent upon the member of the personnel himself/herself to contact the Medical Service 73186, without awaiting its summons.

  6. Works notice

    CERN Multimedia

    GS Department

    2009-01-01

    We would like to inform you that renovation work on the road lighting equipment will take place on the Meyrin site between 19 October and 18 December 2009. During this period, traffic will be disrupted on the Schrödinger, Perrin and Siegbahn roads, ie from Building 274 to Building 188. We request that you comply with the road signs and thank you for your understanding. GS-SEM Group

  7. RESUMING WORK

    CERN Multimedia

    Medical Service

    2001-01-01

    In application of the Staff Rules and Regulations, every member of the CERN personnel is required to undergo a medical examination on resuming work after sick leave: if the medical absence has been for 21 calendar days or longer, if absent more than 48 hours due to professional accident. It is incumbent upon the member of the personnel himself/herself to contact the Medical Service 73186, without awaiting its summons.

  8. RESUMING WORK

    CERN Multimedia

    Medical Service

    2002-01-01

    In application of the Staff Rules and Regulations, every member of the CERN personnel is required to undergo a medical examination on resuming work after sick leave: if the medical absence has been for 21 calendar days or longer, if absent more than 48 hours due to professional accident. It is incumbent upon the member of the personnel himself/herself to contact the Medical Service 73186, without awaiting its summons. Medical Service

  9. RESUMING WORK

    CERN Multimedia

    Service Médical

    2000-01-01

    In application of the Staff Rules and Regulations, every member of the CERN personnel is required to undergo a medical examination on resuming work after sick leave: if the medical absence has been for 21 calendar days or longer, if absent more than 48 hours due to professional accident. It is incumbent upon the member of the personnel himself/herself to contact the Medical Service 73186, without awaiting its summons.

  10. RESUMING WORK

    CERN Multimedia

    Medical Service

    2002-01-01

    In application of the Staff Rules and Regulations, every member of the CERN personnel is required to undergo a medical examination on resuming work after sick leave: if the medical absence has been for 21 calendar days or longer, if absent more than 48 hours due to professional accident. It is incumbent upon the member of the personnel himself/herself to contact the Medical Service 73186, without awaiting its summons. Medical Service

  11. Analysis of the generation and monitoring of impact on fauna in the gas pipeline works in the current environmental legislation; Analise da geracao e monitoramento do impacto sobre a fauna silvestre em obras de gasodutos face a legislacao ambiental vigente

    Energy Technology Data Exchange (ETDEWEB)

    Caldas, Flaviana V.; Serricchio, Claudio [PETROBRAS, Rio de Janeiro, RJ (Brazil); Akahori, Lisa [TELSAN Engenharia e Servicos Ltda, Vitoria, ES (Brazil); Nascimento, Reinaldo R. [IMC Saste - Construcoes, Servicos e Comercio Ltda., Sao Paulo, SP (Brazil)

    2008-07-01

    The impacts to wildlife in areas where gas pipelines will be implemented are considerable, changing the existing balance. The main environmental measure adopted in the cases is the deployment of the Fauna Management Programme. This programme is sub - divided into two: Monitoring and Rescue of the fauna. The tracking step starts before the installation of the venture, with the completion of a first in order to identify the impacts before the venture, and finishes two years after the end of the works. These studies are based on guidelines set in the Normative Instruction of the environmental licensor agency, in which the criteria for implementation are restrictive, often without making a license agency distinction of methodology for enterprises with different characteristics. This article intended to review the criteria and the procedures established by the legislation and its real applicability in gas pipeline projects face to the environmental impacts identified to this activity. For this analysis, the methodology used was the case study of two gas pipelines: Cabiunas - Vitoria (GASCAV) and Cacimbas - Catu (GASCAC). The results allowed to conclude that the actions developed to the Sub-Programme of Rescue of the fauna are satisfactory to control environmental impacts and that the Sub-Programme of Monitoring of the fauna just confirm behaviors and information's previous detected. (author)

  12. Current Situation And Countermeasure On The New Media To Promote The Work Of The Communist Youth League~%浅析新媒体推进共青团工作的现状与对策

    Institute of Scientific and Technical Information of China (English)

    王鹏

    2012-01-01

    In the information age of high - speed development today, the use of new media to guide the youth of this social mobilization mode will become the next important point of the work of the Communist Youth league. Young people to build a new media stereo system, accelerate the establishment of new media commentator team construction, advocate for the establishment of new media ethics system will be the next focus.%在信息时代高速发展的今天,运用新媒体引导青年这一社会化动员方式必将成为未来共青团工作重要着力点。新媒体既带来了挑战也带来了机遇,搭建工作阵地、增强引导的针对性和实效性、更好地服务和维权、扩大团组织覆盖面等已成为新媒体服务共青团工作的巨大优势。打造青少年的新媒体立体体系、加快建立新媒体评论员队伍建设、倡导建立新媒体道德体系将是下一步的工作重点。

  13. The Practical Enlightenment of Confucian "Governing with the Power of Virtue" to Our Country's Current Anti-corruption Work%孔子“为政以德”思想的现实启示

    Institute of Scientific and Technical Information of China (English)

    吴蓓

    2011-01-01

    "为政以德"思想是儒家思想的重要内容,它主张为政者要以身作则,以民为本,以刑辅德。这一思想深刻影响到后世统治者的治国方略。继承和发扬孔子的"为政以德"思想,对我国当前反腐败工作的开展具有非常重要的现实意义。%The thinking of "governing with the power of virtue" is the important content of Confucianism.Its connotation is abundant and profound.It requires the governor to lead by example,rely on the people,and enforce morality with the assistance of punishment.This thinking has deeply influenced the later governors' governing strategies.Until today,corruption has become a severe problem that our economic and social development facing.Carrying on and promoting Confucian thinking of "governing with the power of virtue" has signal value to the development of anti-corruption work.

  14. Current Situation and Reflection of the Students'Career Guidance Work in Vocational Colleges%高职院校学生生涯辅导工作的现状与思考

    Institute of Scientific and Technical Information of China (English)

    李可依; 谢骏

    2014-01-01

    Counselors in vocational colleges are the key to career guidance work though they are also faced with difficulties in real-ity including lacking of professional knowledge and skills, difficulties for them to make scientific transformation between multiple roles, students'ignorance of career counseling and short of initiative consciousness, and conflict of demand between individual and group.The main ways to solve the difficulties are to improve counselor career counseling professional ability and widen the radiation intensity of career guidance.%辅导员是高职院校生涯辅导工作的关键人物,但其现实工作存在诸多困境:辅导员缺乏生涯辅导方面的专业知识和技能;辅导员职业角色多元,很难进行科学的角色转换;学生对生涯辅导不重视,主动进行生涯规划的意识较为薄弱;学生生涯辅导群体性和个体需求性存在冲突。解决高职院校学生生涯辅导工作困境有两条途径:提升辅导员的生涯辅导专业能力,拓宽生涯辅导的辐射力度。

  15. Attributes of clinical role models as described by senior veterinary students in Australia.

    Science.gov (United States)

    Schull, Daniel N; Kyle, Greg J; Coleman, Glen T; Mills, Paul C

    2012-01-01

    Role models incite admiration and provide inspiration, contributing to learning as students aspire to emulate their example. The attributes of physician role models for medical trainees are well documented, but they remain largely unexplored in the context of veterinary medical training. The aim of the current study was to describe the attributes that final-year veterinary students (N=213) at the University of Queensland identified when reflecting on their clinical role models. Clinical role model descriptions provided by students were analyzed using concept-mapping software (Leximancer v. 2.25). The most frequent and highly connected concepts used by students when describing their role model(s) included clients, vet, and animal. Role models were described as good communicators who were skilled at managing relationships with clients, patients, and staff. They had exemplary knowledge, skills, and abilities, and they were methodical and conducted well-structured consultations. They were well respected and, in turn, demonstrated respect for clients, colleagues, staff, and students alike. They were also good teachers and able to tailor explanations to suit both clients and students. Findings from this study may serve to assist with faculty development and as a basis for further research in this area.

  16. Paid work and unpaid work

    DEFF Research Database (Denmark)

    Bonke, Jens

    Time-use information is preferably obtained from diaries, as this method is considered more reliable than information from questionnaires. The diary-technique seems to be unique in catching the rhythm of every day life and thereby the structuring of work and leisure during a well-defined and memo...

  17. The white matter query language: a novel approach for describing human white matter anatomy.

    Science.gov (United States)

    Wassermann, Demian; Makris, Nikos; Rathi, Yogesh; Shenton, Martha; Kikinis, Ron; Kubicki, Marek; Westin, Carl-Fredrik

    2016-12-01

    We have developed a novel method to describe human white matter anatomy using an approach that is both intuitive and simple to use, and which automatically extracts white matter tracts from diffusion MRI volumes. Further, our method simplifies the quantification and statistical analysis of white matter tracts on large diffusion MRI databases. This work reflects the careful syntactical definition of major white matter fiber tracts in the human brain based on a neuroanatomist's expert knowledge. The framework is based on a novel query language with a near-to-English textual syntax. This query language makes it possible to construct a dictionary of anatomical definitions that describe white matter tracts. The definitions include adjacent gray and white matter regions, and rules for spatial relations. This novel method makes it possible to automatically label white matter anatomy across subjects. After describing this method, we provide an example of its implementation where we encode anatomical knowledge in human white matter for ten association and 15 projection tracts per hemisphere, along with seven commissural tracts. Importantly, this novel method is comparable in accuracy to manual labeling. Finally, we present results applying this method to create a white matter atlas from 77 healthy subjects, and we use this atlas in a small proof-of-concept study to detect changes in association tracts that characterize schizophrenia.

  18. On describing human white matter anatomy: the white matter query language.

    Science.gov (United States)

    Wassermann, Demian; Makris, Nikos; Rathi, Yogesh; Shenton, Martha; Kikinis, Ron; Kubicki, Marek; Westin, Carl-Fredrik

    2013-01-01

    The main contribution of this work is the careful syntactical definition of major white matter tracts in the human brain based on a neuroanatomist's expert knowledge. We present a technique to formally describe white matter tracts and to automatically extract them from diffusion MRI data. The framework is based on a novel query language with a near-to-English textual syntax. This query language allows us to construct a dictionary of anatomical definitions describing white matter tracts. The definitions include adjacent gray and white matter regions, and rules for spatial relations. This enables automated coherent labeling of white matter anatomy across subjects. We use our method to encode anatomical knowledge in human white matter describing 10 association and 8 projection tracts per hemisphere and 7 commissural tracts. The technique is shown to be comparable in accuracy to manual labeling. We present results applying this framework to create a white matter atlas from 77 healthy subjects, and we use this atlas in a proof-of-concept study to detect tract changes specific to schizophrenia.

  19. 论高校学生管理工作面临的现状及相关策略%On the Current Situation and Related Strategies of Uni-versity Student Management Work

    Institute of Scientific and Technical Information of China (English)

    姜利英

    2014-01-01

    高校学生管理工作是高校教育的一个重要组成部分,同时学生管理也是一门艺术,是一门值得研究的应用科学。大学作为国家人才的培养基地,高效科学的学生管理机制,其意义是不言而喻的。本文将从分析传统模式的弊端到新模式的转变带来的新的挑战,以及如何提高以辅导员为主导的管理者队伍自身建设的素质要求做了详细的论述,积极探索适应时代要求的学生管理方式。%The student management work of university is an im-portant part of university education, and student management is an art, as well as an applied science worthy of research. The uni-versity is a talent cultivation base for our country, so it is self-ev-ident that its efficient and scientific student management system is of great significance. This article elaborates from the analysis of the disadvantages of the traditional mode to the new challenges brought from the new pattern's transformation. It also detailedly elucidates how to improve the quality and construction of the management group dominated by counselors, with the aim to ac-tively explore a student management mode meeting the need of the times.

  20. A case series to describe the clinical characteristics of foot ulceration in patients with rheumatoid arthritis.

    Science.gov (United States)

    Siddle, Heidi J; Firth, Jill; Waxman, Robin; Nelson, E Andrea; Helliwell, Philip S

    2012-03-01

    The aim of this study was to describe the clinical characteristics of foot ulceration in patients with rheumatoid arthritis (RA). Adults with RA and current foot ulceration but without diabetes were recruited. Clinical examination included assessment of RA disease activity, foot deformity, peripheral vascular disease, neuropathy and plantar pressures. Location, wound characteristics and time to healing were recorded for each ulcer. Participants completed the Health Assessment Questionnaire and Leeds Foot Impact Scale. Thirty-two cases with 52 current ulcers were recruited. Thirteen patients (41%) experienced more than one current ulcer: 5 (16%) had bilateral ulceration, 15 (47%) had previous ulceration at a current ulcer site. The majority (n = 33) of open ulcers were located over the dorsal aspect of the interphalangeal joints (n = 12), plantar aspect of the metatarsophalangeal joints (MTPJs) (n = 12) and medial aspect of first MTPJs (n = 9). In ulcerated limbs (n = 37), ankle brachial pressure index (ABPI) was plantar pressures were >6 kg/cm(2) in 6 (16%). Mean ulcer size was 4.84 by 3.29 mm. Most ulcers (n = 42, 81%) were superficial; five (9.6%) were infected. Time to healing was available for 41 ulcers: mean duration was 28 weeks. Three ulcers remained open. In conclusion, foot ulceration in RA is recurrent and multiple ulcers are common. Whilst ulcers are small and shallow, time to achieve healing is slow, posing infection risk. Reduced protective sensation is common in affected patients. The prevalence of arterial disease is low but may be under estimated due to high intolerance of ABPI.

  1. Working Environment and Technological Development

    DEFF Research Database (Denmark)

    Clausen, Christian; Nielsen, Klaus T.; Jensen, Per Langaa

    1997-01-01

    The paper describes the purpose, themes, overarching research questions and specific projects of the programme: Working Environment and Technological Development. The major research themes are:1) Management concepts and the working environment, which considers the visions and their and their conc......The paper describes the purpose, themes, overarching research questions and specific projects of the programme: Working Environment and Technological Development. The major research themes are:1) Management concepts and the working environment, which considers the visions...... and their and their concept of working environment2) Technology renewal, which considers the role of the working environment in connection with the development and use of concrete technologies3) Working environment planning, which considers the existing efforts to place the working environment in a planning process....

  2. Unifying themes in microbial associations with animal and plant hosts described using the gene ontology.

    Science.gov (United States)

    Torto-Alalibo, Trudy; Collmer, Candace W; Gwinn-Giglio, Michelle; Lindeberg, Magdalen; Meng, Shaowu; Chibucos, Marcus C; Tseng, Tsai-Tien; Lomax, Jane; Biehl, Bryan; Ireland, Amelia; Bird, David; Dean, Ralph A; Glasner, Jeremy D; Perna, Nicole; Setubal, Joao C; Collmer, Alan; Tyler, Brett M

    2010-12-01

    Microbes form intimate relationships with hosts (symbioses) that range from mutualism to parasitism. Common microbial mechanisms involved in a successful host association include adhesion, entry of the microbe or its effector proteins into the host cell, mitigation of host defenses, and nutrient acquisition. Genes associated with these microbial mechanisms are known for a broad range of symbioses, revealing both divergent and convergent strategies. Effective comparisons among these symbioses, however, are hampered by inconsistent descriptive terms in the literature for functionally similar genes. Bioinformatic approaches that use homology-based tools are limited to identifying functionally similar genes based on similarities in their sequences. An effective solution to these limitations is provided by the Gene Ontology (GO), which provides a standardized language to describe gene products from all organisms. The GO comprises three ontologies that enable one to describe the molecular function(s) of gene products, the biological processes to which they contribute, and their cellular locations. Beginning in 2004, the Plant-Associated Microbe Gene Ontology (PAMGO) interest group collaborated with the GO consortium to extend the GO to accommodate terms for describing gene products associated with microbe-host interactions. Currently, over 900 terms that describe biological processes common to diverse plant- and animal-associated microbes are incorporated into the GO database. Here we review some unifying themes common to diverse host-microbe associations and illustrate how the new GO terms facilitate a standardized description of the gene products involved. We also highlight areas where new terms need to be developed, an ongoing process that should involve the whole community.

  3. Using Multiple Metadata Standards to Describe Climate Datasets in a Semantic Framework

    Science.gov (United States)

    Blumenthal, M. B.; Del Corral, J.; Bell, M.

    2007-12-01

    The standards underlying the Semantic Web -- Resource Description Framework (RDF) and Web Ontology Language (OWL), among others -- show great promise in addressing some of the basic problems in earth science metadata. In particular they provide a single framework that allows us to describe datasets according to multiple standards, creating a more complete description than any single standard can support, and avoiding the difficult problem of creating a super-standard that can describe everything about everything. The Semantic Web standards provide a framework for explicitly describing the data models implicit in programs that display and manipulate data. They also provide a framework where multiple metadata standards can be described. Most importantly, these data models and metadata standards can be interrelated, a key step in creating interoperability, and an important step in creating a practical system. As a exercise in understanding how this framework might be used, we have created an RDF expression of the datasets and some of the metadata in the IRI/LDEO Climate Data Library. This includes concepts like datasets, units, dependent variables, and independent variables. These datasets have been provided under diverse frameworks that have varied levels of associated metadata, including netCDF, GRIB, GeoTIFF, and OpenDAP: these frameworks have some associated concepts that are common, some that are similar and some that are quite distinct. We have also created an RDF expression of a taxonomy that forms the basis of a earth data search interface. These concepts include location, time, quantity, realm, author, and institution. A series of inference engines using currently-evolving semantic web technologies are then used to infer the connections between the diverse data-oriented concepts of the data library as well as the distinctly different conceptual framework of the data search.

  4. RESUMING WORK

    CERN Multimedia

    2003-01-01

    In application of the Staff Rules and Regulations, every member of the CERN personnel is required to undergo a medical examination on resuming work after sick leave: - if the medical absence has been for 21 calendar days or longer - if absent more than 48 hours due to professional accident It is incumbent upon the member of the personnel himself/herself to contact the Medical Service Tel. 73186, without awaiting its summons. The purpose of this exam is not to check on the absenteeism, but to support the professional reinsertion. Medical Service

  5. RESUMING WORK

    CERN Multimedia

    2003-01-01

    In application of the Staff Rules and Regulations, every member of the CERN personnel is required to undergo a medical examination on resuming work after sick leave: - if the medical absence has been for 21 calendar days or longer - if absent more than 48 hours due to professional accident It is incumbent upon the member of the personnel himself/herself to contact the Medical Service tel. 73186, without awaiting its summons. The purpose of this exam is not to check on the absenteeism, but to support the professional reinsertion. Medical Service

  6. RESUMING WORK

    CERN Multimedia

    2004-01-01

    In application of the Staff Rules and Regulations, every member of the CERN personnel is required to undergo a medical examination on resuming work after sick leave: • if the medical absence has been for 21 calendar days or longer • if absent more than 48 hours due to professional accident It is incumbent upon the member of the personnel himself/herself to contact the Medical Service tel. 73186, without awaiting its summons. The purpose of this exam is not to check on the absenteeism, but to support the professional reinsertion. Medical Service

  7. Biopsychosocial correlates of work motivation

    OpenAIRE

    Liesienė, Justina; Endriulaitienė, Auksė

    2008-01-01

    Background, purpose. Work motivation is a potential predictor of employee turnover, job satisfaction, commitment, job performance and psychological wellbeing. Researchers argue that motivated employees work more effectively. The purpose of the current study was to identify biological (gender, age and health), psychological (personality traits) and social (marital status, children, work sector and position) factors related to employees’ work motivation. It was also predicted that subjectively ...

  8. Theoretical models for describing longitudinal bunch compression in the neutralized drift compression experiment

    Directory of Open Access Journals (Sweden)

    Adam B. Sefkow

    2006-09-01

    Full Text Available Heavy ion drivers for warm dense matter and heavy ion fusion applications use intense charge bunches which must undergo transverse and longitudinal compression in order to meet the requisite high current densities and short pulse durations desired at the target. The neutralized drift compression experiment (NDCX at the Lawrence Berkeley National Laboratory is used to study the longitudinal neutralized drift compression of a space-charge-dominated ion beam, which occurs due to an imposed longitudinal velocity tilt and subsequent neutralization of the beam’s space charge by background plasma. Reduced theoretical models have been used in order to describe the realistic propagation of an intense charge bunch through the NDCX device. A warm-fluid model is presented as a tractable computational tool for investigating the nonideal effects associated with the experimental acceleration gap geometry and voltage waveform of the induction module, which acts as a means to pulse shape both the velocity and line density profiles. Self-similar drift compression solutions can be realized in order to transversely focus the entire charge bunch to the same focal plane in upcoming simultaneous transverse and longitudinal focusing experiments. A kinetic formalism based on the Vlasov equation has been employed in order to show that the peaks in the experimental current profiles are a result of the fact that only the central portion of the beam contributes effectively to the main compressed pulse. Significant portions of the charge bunch reside in the nonlinearly compressing part of the ion beam because of deviations between the experimental and ideal velocity tilts. Those regions form a pedestal of current around the central peak, thereby decreasing the amount of achievable longitudinal compression and increasing the pulse durations achieved at the focal plane. A hybrid fluid-Vlasov model which retains the advantages of both the fluid and kinetic approaches has been

  9. Modeling and strain gauging of eddy current repulsion deicing systems

    Science.gov (United States)

    Smith, Samuel O.

    1993-01-01

    Work described in this paper confirms and extends work done by Zumwalt, et al., on a variety of in-flight deicing systems that use eddy current repulsion for repelling ice. Two such systems are known as electro-impulse deicing (EIDI) and the eddy current repulsion deicing strip (EDS). Mathematical models for these systems are discussed for their capabilities and limitations. The author duplicates a particular model of the EDS. Theoretical voltage, current, and force results are compared directly to experimental results. Dynamic strain measurements results are presented for the EDS system. Dynamic strain measurements near EDS or EIDI coils are complicated by the high magnetic fields in the vicinity of the coils. High magnetic fields induce false voltage signals out of the gages.

  10. Comparative urban Bangladesh physics learning experiences as described by students and alumni

    Science.gov (United States)

    Ali, Tanzeem Iqbal

    A neo-culture of extra-curricular coaching prior to sitting the terminal exam was once the privileged domain of public education systems in the Eastern world, but this is no longer the case. This multi-phase study based on a grounded theory approach considered a diversity of physics learning experiences of students and alumni from two urban private schools, an extra-curricular coaching center and a private tutor in a developing South-Asian country. There are various types of tutoring available for students in South Asia as listed by their main characteristics (deCastro and deGuzman, 2012). First 'lean on' is for low achieving slow learners providing hidden remedial activities by school teachers and are usually unregulated. Second, 'pass on' is for students with busy parents, or those lacking assistance with school work. This second type of tutoring provides supplementary activities by school teachers as well as small-scale institutions regulated as a business and an academic entity. Third, 'ride on' is for both high and low achieving students whose parents can afford tutorial fees. This type of tutoring provides structured, remedial and enrichment activities by multinational institutions, experts in the field and university students and are regulated as a business and academic entity. The participants ranged in age from 14 years to 28 years. Phase 1 of the study consisted of a pilot study with online participants who were recent alumni who had taken their formal Physics exit exams quite recently. Clinical interviews and moderated focus group discussions identified nine emerging themes: (i) negative feelings about current education system, (ii) mixed views on coaching outside and beyond school, (iii) negative attitudes about being an O and A level student in urban Bangladesh, (iv) truth about article by (Imam, 2010), (v) negative views on society's influence and local culture about education in Bangladesh, (v) mixed views on extra-curricular activities and physical

  11. The relation between work ethics and work morality and the factors effecting work ethics in work-life

    Directory of Open Access Journals (Sweden)

    Sibel Gök

    2008-02-01

    Full Text Available In recent years, the importance of work ethics and morality has been increased. The effect of them in work-life and their relations with the subjects such as performance, loyalty, competition, etc. have been studied by a number of researchers. The work ethics and morality concepts are becoming widespread in business application, work-life and global trading. Therefore, they appear as a subject for further researches.In this study, the concepts of the work ethics, morality and the development of them in work-life are examined. The differences and similarities between work ethics and morality in terms of quality, content and comprehension etc. are described and discussed. The factors effecting work ethics in work-life, are represented in the light of literature. In our work, we explain and evaluate how the factors such as globalization, culture, social responsibility etc. are effecting it.

  12. Writing parallel programs that work

    CERN Document Server

    CERN. Geneva

    2012-01-01

    Serial algorithms typically run inefficiently on parallel machines. This may sound like an obvious statement, but it is the root cause of why parallel programming is considered to be difficult. The current state of the computer industry is still that almost all programs in existence are serial. This talk will describe the techniques used in the Intel Parallel Studio to provide a developer with the tools necessary to understand the behaviors and limitations of the existing serial programs. Once the limitations are known the developer can refactor the algorithms and reanalyze the resulting programs with the tools in the Intel Parallel Studio to create parallel programs that work. About the speaker Paul Petersen is a Sr. Principal Engineer in the Software and Solutions Group (SSG) at Intel. He received a Ph.D. degree in Computer Science from the University of Illinois in 1993. After UIUC, he was employed at Kuck and Associates, Inc. (KAI) working on auto-parallelizing compiler (KAP), and was involved in th...

  13. Two—Dimensional Mathematical Model and Numerical Simulation Describing the Melting Process of Cylindrical Basalt Bed

    Institute of Scientific and Technical Information of China (English)

    YanQuanying; ShangDeku; 等

    1999-01-01

    A two-dimensional mathematical model was built to describe the melting process of cylindrical basalt particle bed in a crucible.The melting processes with respect to the factors of thermal boundary conditions and particle sizes of basalt were simulated by using the numerical method (FDM).The governing equations were discretized in tridiagonal matrix form and were solved by using the tridiagonal matrix algorithm (TDMA) as well as the alternative direction implicit(ADI) solver.The temperature distribution,the moving law of the two dimensional phase-change boundaries the thermal current distribution were given through the numerical simulation.The results provided a theoretical basis for deciding heating procedure,for evaluating power import and controlling furnace temperature and for predicting basalt melting states etc.In the experiment,an electrical furnace was designed based on the computations.It has been proved that the simulation results are reasonably coincident with the experimental data.

  14. Reconciling taxonomy and phylogenetic inference: formalism and algorithms for describing discord and inferring taxonomic roots

    Directory of Open Access Journals (Sweden)

    Matsen Frederick A

    2012-05-01

    Full Text Available Abstract Background Although taxonomy is often used informally to evaluate the results of phylogenetic inference and the root of phylogenetic trees, algorithmic methods to do so are lacking. Results In this paper we formalize these procedures and develop algorithms to solve the relevant problems. In particular, we introduce a new algorithm that solves a "subcoloring" problem to express the difference between a taxonomy and a phylogeny at a given rank. This algorithm improves upon the current best algorithm in terms of asymptotic complexity for the parameter regime of interest; we also describe a branch-and-bound algorithm that saves orders of magnitude in computation on real data sets. We also develop a formalism and an algorithm for rooting phylogenetic trees according to a taxonomy. Conclusions The algorithms in this paper, and the associated freely-available software, will help biologists better use and understand taxonomically labeled phylogenetic trees.

  15. A renormalization approach to describe charge transport in quasiperiodic dangling backbone ladder (DBL)-DNA molecules

    Energy Technology Data Exchange (ETDEWEB)

    Sarmento, R.G. [Departamento de Fisica, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN (Brazil); Fulco, U.L. [Departamento de Biofisica e Farmacologia, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN (Brazil); Albuquerque, E.L., E-mail: eudenilson@gmail.com [Departamento de Biofisica e Farmacologia, Universidade Federal do Rio Grande do Norte, 59072-970 Natal, RN (Brazil); Caetano, E.W.S. [Instituto Federal de Educacao, Ciencia e Tecnologia do Ceara, 60040-531 Fortaleza, CE (Brazil); Freire, V.N. [Departamento de Fisica, Universidade Federal do Ceara, 60455-760 Fortaleza, CE (Brazil)

    2011-10-31

    Highlights: → One-step renormalization approach to describe the DBL-DNA molecule. → Electronic tight-binding Hamiltonian model. → A quasiperiodic sequence to mimic the DNA nucleotides arrangement. → Electronic transmission spectra. → I-V characteristics. -- Abstract: We study the charge transport properties of a dangling backbone ladder (DBL)-DNA molecule focusing on a quasiperiodic arrangement of its constituent nucleotides forming a Rudin-Shapiro (RS) and Fibonacci (FB) Poly (CG) sequences, as well as a natural DNA sequence (Ch22) for the sake of comparison. Making use of a one-step renormalization process, the DBL-DNA molecule is modeled in terms of a one-dimensional tight-binding Hamiltonian to investigate its transmissivity and current-voltage (I-V) profiles. Beyond the semiconductor I-V characteristics, a striking similarity between the electronic transport properties of the RS quasiperiodic structure and the natural DNA sequence was found.

  16. A simple model to describe intrinsic stellar noise for exoplanet detection around red giants

    CERN Document Server

    North, Thomas S H; Gilliland, Ronald L; Huber, Daniel; Campante, Tiago L; Handberg, Rasmus; Lund, Mikkel N; Veras, Dimitri; Kuszlewicz, James S; Farr, Will M

    2016-01-01

    In spite of the huge advances in exoplanet research provided by the NASA Kepler Mission, there remain only a small number of transit detections around evolved stars. Here we present a reformulation of the noise properties of red-giant stars, where the intrinsic stellar granulation, and the stellar oscillations described by asteroseismology play a key role. The new noise model is a significant improvement on the current Kepler results for evolved stars. Our noise model may be used to help understand planet detection thresholds for the ongoing K2 and upcoming TESS missions, and serve as a predictor of stellar noise for these missions. As an application of our noise model, we explore the minimum detectable planet radii for red giant stars, and find that Neptune sized planets should be detectable around low luminosity red giant branch stars.

  17. Unified theory to describe and engineer conservation laws in light-matter interactions

    Science.gov (United States)

    Fernandez-Corbaton, Ivan; Rockstuhl, Carsten

    2017-05-01

    The effects of the electromagnetic field on material systems are governed by joint light-matter conservation laws. An increasing number of these balance equations are currently being considered both theoretically and with an eye to their practical applicability. We present a unified theory to treat conservation laws in light-matter interactions. It can be used to describe and engineer the transfer of any measurable property from the electromagnetic field to any object. The theory allows one to explicitly characterize and separately compute the transfer due to asymmetry of the object and the transfer due to field absorption by the object. It also allows one to compute the upper bound of the transfer rate of any given property to any given object, together with the corresponding most efficient illumination which achieves the bound. Due to its algebraic nature, the approach is inherently suited for computer implementation.

  18. A simple model to describe intrinsic stellar noise for exoplanet detection around red giants

    Science.gov (United States)

    North, Thomas S. H.; Chaplin, William J.; Gilliland, Ronald L.; Huber, Daniel; Campante, Tiago L.; Handberg, Rasmus; Lund, Mikkel N.; Veras, Dimitri; Kuszlewicz, James S.; Farr, Will M.

    2017-02-01

    In spite of the huge advances in exoplanet research provided by the NASA Kepler Mission, there remain only a small number of transit detections around evolved stars. Here, we present a reformulation of the noise properties of red-giant stars, where the intrinsic stellar granulation and the stellar oscillations described by asteroseismology play a key role. The new noise model is a significant improvement on the current Kepler results for evolved stars. Our noise model may be used to help understand planet detection thresholds for the ongoing K2 and upcoming TESSmissions, and serve as a predictor of stellar noise for these missions. As an application of our noise model, we explore the minimum detectable planet radii for red giant stars, and find that Neptune-sized planets should be detectable around low-luminosity red giant branch stars.

  19. A unified theory to describe and engineer conservation laws in light-matter interactions

    CERN Document Server

    Fernandez-Corbaton, Ivan

    2016-01-01

    The effects of the electromagnetic field on material systems are governed by joint light-matter conservation laws. An increasing number of these balance equations are currently being considered both theoretically and with an eye to their practical applicability. We present a unified theory to treat conservation laws in light-matter interactions. It can be used to describe and engineer the transfer of any measurable property from the electromagnetic field to any object. The theory allows to explicitly characterize and separately compute the transfer due to asymmetry of the object and the transfer due to field absorption by the object. It also allows to compute the upper bound of the transfer rate of any given property to any given object, together with the corresponding most efficient illumination which achieves the bound. Due to its algebraic nature, the approach is inherently suited for computer implementation.

  20. Challenges in describing nuclear reactions outcomes at near-barrier energies

    Science.gov (United States)

    Dasgupta, M.; Simpson, E. C.; Kalkal, S.; Cook, K. J.; Carter, I. P.; Hinde, D. J.; Luong, D. H.

    2017-01-01

    The properties of light nuclei such as 6Li, 7Li, 9Be and 12C, and their reaction outcomes are known to be strongly influenced by their underlying α-cluster structure. Reaction models do not yet exist to allow accurate predictions of outcomes following a collision of these nuclei with another nucleus. As a result, reaction models within GEANT, and nuclear fusion models do not accurately describe measured products or cross sections. Recent measurements at the Australian National University have shown new reaction modes that lead to breakup of 6Li, 7Li into lighter clusters, again presenting a further challenge to current models. The new observations and subsequent model developments will impact on accurate predictions of reaction outcomes of 12C - a three α-cluster nucleus – that is used in heavy ion therapy.

  1. Homogeneous Diffusion Solid Model as a Realistic Approach to Describe Adsorption onto Materials with Different Geometries

    Science.gov (United States)

    Sabio, E.; Zamora, F.; González-García, C. M.; Ledesma, B.; Álvarez-Murillo, A.; Román, S.

    2016-12-01

    In this work, the adsorption kinetics of p-nitrophenol (PNP) onto several commercial activated carbons (ACs) with different textural and geometrical characteristics was studied. For this aim, a homogeneous diffusion solid model (HDSM) was used, which does take the adsorbent shape into account. The HDSM was solved by means of the finite element method (FEM) using the commercial software COMSOL. The different kinetic patterns observed in the experiments carried out can be described by the developed model, which shows that the sharp drop of adsorption rate observed in some samples is caused by the formation of a concentration wave. The model allows one to visualize the changes in concentration taking place in both liquid and solid phases, which enables us to link the kinetic behaviour with the main features of the carbon samples.

  2. Fitting mathematical models to describe the rheological behaviour of chocolate pastes

    Science.gov (United States)

    Barbosa, Carla; Diogo, Filipa; Alves, M. Rui

    2016-06-01

    The flow behavior is of utmost importance for the chocolate industry. The objective of this work was to study two mathematical models, Casson and Windhab models that can be used to fit chocolate rheological data and evaluate which better infers or previews the rheological behaviour of different chocolate pastes. Rheological properties (viscosity, shear stress and shear rates) were obtained with a rotational viscometer equipped with a concentric cylinder. The chocolate samples were white chocolate and chocolate with varying percentages in cacao (55%, 70% and 83%). The results showed that the Windhab model was the best to describe the flow behaviour of all the studied samples with higher determination coefficients (r2 > 0.9).

  3. A characterization of Parkinson's disease by describing the visual field motion during gait

    Science.gov (United States)

    Trujillo, David; Martínez, Fabio; Atehortúa, Angélica; Alvarez, Charlens; Romero, Eduardo

    2015-12-01

    An early diagnosis of Parkinson's Disease (PD) is crucial towards devising successful rehabilitation programs. Typically, the PD diagnosis is performed by characterizing typical symptoms, namely bradykinesia, rigidity, tremor, postural instability or freezing gait. However, traditional examination tests are usually incapable of detecting slight motor changes, specially for early stages of the pathology. Recently, eye movement abnormalities have correlated with early onset of some neurodegenerative disorders. This work introduces a new characterization of the Parkinson disease by describing the ocular motion during a common daily activity as the gait. This paper proposes a fully automatic eye motion analysis using a dense optical flow that tracks the ocular direction. The eye motion is then summarized using orientation histograms constructed during a whole gait cycle. The proposed approach was evaluated by measuring the χ2 distance between the orientation histograms, showing substantial differences between control and PD patients.

  4. Fourier Heat Conduction as a phenomenon described within the scope of the Second Law

    CERN Document Server

    Jesudason, Christopher G

    2014-01-01

    The historical development of the Carnot cycle necessitated the construction of isothermal and adiabatic pathways within the cycle that were also mechanically "reversible" which lead eventually to the Kelvin-Clausius development of the entropy function where the heat absorption is for the diathermal (isothermal) paths of the cycle only. It is deduced from traditional arguments that Fourier heat conduction involves mechanically "reversible" heat transfer with irreversible entropy increase. Here we model heat conduction as a thermodynamically reversible but mechanically irreversible process. The MD simulations conducted shows excellent agreement with the theory. Such views and results as these, if developed to a successful conclusion could imply that the Carnot cycle be viewed as describing a local process of energy-work conversion and that irreversible local processes might be brought within the scope of this cycle, implying a unified treatment of thermodynamically (i) irreversible, (ii) reversible, (iii) isot...

  5. Ordinal regression models to describe tourist satisfaction with Sintra's world heritage

    Science.gov (United States)

    Mouriño, Helena

    2013-10-01

    In Tourism Research, ordinal regression models are becoming a very powerful tool in modelling the relationship between an ordinal response variable and a set of explanatory variables. In August and September 2010, we conducted a pioneering Tourist Survey in Sintra, Portugal. The data were obtained by face-to-face interviews at the entrances of the Palaces and Parks of Sintra. The work developed in this paper focus on two main points: tourists' perception of the entrance fees; overall level of satisfaction with this heritage site. For attaining these goals, ordinal regression models were developed. We concluded that tourist's nationality was the only significant variable to describe the perception of the admission fees. Also, Sintra's image among tourists depends not only on their nationality, but also on previous knowledge about Sintra's World Heritage status.

  6. Sensitivity analysis of a biofilm model describing mixed growth of nitrite oxidisers in a CSTR.

    Science.gov (United States)

    Kornaros, M; Dokianakis, S N; Lyberatos, G

    2006-01-01

    A simple kinetic model has been developed for describing nitrite oxidation by autotrophic aerobic nitrifiers in a CSTR reactor, in which mixed (suspended and attached) growth conditions are prevailing. In this work, a critical dimensionless parameter is identified containing both biofilm characteristics and microbial kinetic parameters, as well as the specific (per volume) surface of the reactor configuration used. Evaluation of this dimensionless parameter can easily provide information on whether or not wall attachment is critical, and should be taken into account either in kinetic studies or in reactor design, when specific pollutants are to be removed from the waste influent stream. The effect of bulk dissolved oxygen (DO) concentration on the validity of this model is addressed and minimum non-limiting DO concentrations are proposed depending on the reactor configuration.

  7. A document describing shuttle considerations for the design of large space structures

    Science.gov (United States)

    Roebuck, J. A., Jr.

    1981-01-01

    A Shuttle user guide document to aid designers and analysis associated with large space structures projects is described. The format and contents are a compromise designed to satisfy the needs of several levels of users. Special features include checklists and references to source documents as a convenience to very knowledgeable readers. In addition, general, introductory and explanatory text, and art work are included for the reader less familiar with shuttle systems. Also, there are a subject index, glossary, list of acronyms, and many cross references. Throughout the document, there are suggested implications or references to the importance of the included orbiter interfaces material as it pertains to designing and planning large space structures projects. The content of the document is outlined. Shuttle payload accommodations and constraints, connections for orbiter construction fixtures, packaging, and construction space eometry are addressed.

  8. The Goal of Reunification: An Adlerian Approach to Working for Therapeutic Change within the Foster Care System

    Science.gov (United States)

    La Guardia, Amanda C.; Banner, Amy T.

    2012-01-01

    The system of foster care that is currently in operation throughout the United States can present many challenges for counselors as they work with families toward positive outcomes. This article will endeavor to describe common issues and struggles currently facing children and families experiencing foster care and how these difficulties might…

  9. Work ethics: An Islamic prospective

    Directory of Open Access Journals (Sweden)

    Muhammad Shakil Ahmad

    2011-02-01

    Full Text Available Islamic principles completely cover all aspects of life including working in an organization. Current study explore the job related variables an their connection with Islamic Work Ethics. Current study explores the literature relevant to Islamic Work Ethics. Previous study results show that there is significant impact of Islamic work ethics on organizational commitment, job satisfaction and rewards while Islamic work ethics has no significant relation with intention to quit job. Different studies results shows that Islamic work ethics can help build a better morale amongst employees which in turn can result in greater employee job satisfaction. Furthermore adopting Islamic work ethics improves organizational commitment, level of motivation and thus is likely to reduce the number of staff wanting to leave the organization i.e. quitting the job.

  10. Comparative assessment of CFD Tools and the Eurocode Methodology in describing Externally Venting Flames

    Directory of Open Access Journals (Sweden)

    Asimakopoulou Eleni K.

    2013-11-01

    Full Text Available The ability of currently available Computational Fluid Dynamics (CFD tools to adequately describe Externally Venting Flames (EVF is assessed, aiming to demonstrate compliance with performance-based fire safety regulations. The Fire Dynamics Simulator (FDS CFD tool is used to simulate the EVF characteristics in a corridor-compartment-façade configuration exposed to natural fire conditions. Numerical results of the temporal evolution of gas velocity, gas temperatures and flame shape are obtained for both the interior and the exterior of the compartment. Predictions are compared to respective experimental data, as well as to correlations suggested by the Eurocode methodology. The effects of ventilation conditions are investigated by simulating both Forced Draught (FD and No Forced Draught (NoFD test cases. The obtained results suggest that currently available CFD tools are capable of achieving good qualitative agreement with experimental data and, in certain cases (e.g. FD conditions, adequate quantitative agreement, that generally outperforms the Eurocode prescriptive methodology.

  11. Typification of Heliotropium and Tournefortia (Heliotropiaceae species described by Ruiz and Pavón

    Directory of Open Access Journals (Sweden)

    Luebert, Federico

    2014-12-01

    Full Text Available Lectotypes are designated here for 14 names proposed by Ruiz and Pavón in “Flora peruviana, et chilensis” (1799 that were either described or are currently recognized as members of the genera Heliotropium or Tournefortia (Heliotropiaceae: Heliotropium corymbosum, H. incanum, H. lanceolatum, H. microcalyx, H. microstachyum, H. oppositifolium, H. pilosum, H. synzystachyum, Lithospermum aggregatum, Tournefortia angustiflora, T. longifolia, T. polystachya, T. undulata, T. virgata. Currently accepted names and comments on typifications and taxonomic affinities are also provided.Se designan lectotipos de 14 nombres propuestos por Ruiz y Pavón en “Flora peruviana et chilensis” (1799 que son actualmente reconocidos, o fueron descritos, dentro de los géneros Heliotropium o Tournefortia (Heliotropiaceae: Heliotropium corymbosum, H. incanum, H. lanceolatum, H. microcalyx, H. microstachyum, H. oppositifolium, H. pilosum, H. synzystachyum, Lithospermum aggregatum, Tournefortia angustiflora, T. longifolia, T. polystachya, T. undulata, T. virgata. Se incluyen los nombres actualmente aceptados y comentarios sobre su tipificación y afinidades taxonómicas.

  12. Mental health system historians: adults with schizophrenia describe changes in community mental health care over time.

    Science.gov (United States)

    Stein, Catherine H; Leith, Jaclyn E; Osborn, Lawrence A; Greenberg, Sarah; Petrowski, Catherine E; Jesse, Samantha; Kraus, Shane W; May, Michael C

    2015-03-01

    This qualitative study examined changes in community mental health care as described by adults diagnosed with schizophrenia with long-term involvement in the mental health system to situate their experiences within the context of mental health reform movements in the United States. A sample of 14 adults with schizophrenia who had been consumers of mental health services from 12 to 40 years completed interviews about their hospital and outpatient experiences over time and factors that contributed most to their mental health. Overall, adults noted gradual changes in mental health care over time that included higher quality of care, more humane treatment, increased partnership with providers, shorter hospital stays, and better conditions in inpatient settings. Regardless of the mental health reform era in which they were hospitalized, participants described negative hospitalization experiences resulting in considerable personal distress, powerlessness, and trauma. Adults with less than 27 years involvement in the system reported relationships with friends and family as most important to their mental health, while adults with more than 27 years involvement reported mental health services and relationships with professionals as the most important factors in their mental health. The sample did not differ in self-reported use of services during their initial and most recent hospitalization experiences, but differences were found in participants' reported use of outpatient services over time. Findings underscore the importance of the lived experience of adults with schizophrenia in grounding current discourse on mental health care reform.

  13. Telenurses' understanding of work: detective or educator?

    Science.gov (United States)

    Kaminsky, Elenor; Rosenqvist, Urban; Holmström, Inger

    2009-02-01

    This paper is a report of a study to describe the different ways of understanding work among a group of Swedish telenurses. Telenursing is an expanding service in many western countries and telenursing work is likely to be understood in a variety of ways. The way in which a person understands work influences how work is performed. Telenursing demands high levels of competence. A qualitative interview study was conducted during 2004-2005. Twelve of the 20 telenurses working at a call centre in Sweden were interviewed, five of them twice because of organizational changes. The 17 interviews were analysed using a phenomenographic approach. Five different categories were identified in the data: (1) Assess, refer and give advice to the caller (2) Support the caller (3) Strengthen the caller (4) Teach the caller and (5) Facilitate the caller's learning. The first category can be seen as a base for telenursing work and was the only category used by some telenurses. The second category has components of traditional caring and the third is a coaching function. The fourth category contains a teaching component, but the fifth is the only category where the caller's learning is in focus. Telenurses who reported the fifth way also included all other ways of understanding work. Hence, this seems to be the most comprehensive way of understanding work. The categories together constitute a telenursing 'workmap'. This 'workmap' can be used for reflection to expand telenurses' current understanding of work, and hence promote competence development. Telenurses need to be aware of their role in public health education.

  14. Beyond Work-Life "Integration".

    Science.gov (United States)

    Williams, Joan C; Berdahl, Jennifer L; Vandello, Joseph A

    2016-01-01

    Research on the work-family interface began in the 1960s and has grown exponentially ever since. This vast amount of research, however, has had relatively little impact on workplace practice, and work-family conflict is at an all-time high. We review the work-family research to date and propose that a shift of attention is required, away from the individual experience of work and family and toward understanding how identity and status are defined at work. Several factors enshrine cherished identities around current workplace norms. The work devotion schema demands that those who are truly committed to their work will make it the central or sole focus of their lives, without family demands to distract them. Importantly, the work devotion schema underwrites valued class and gender identities: Work devotion is a key way of enacting elite class status and functions as the measure of a man--the longer the work hours and higher the demand for his attention, the better. Advocating change in the way work is done and life is lived meets resistance because it places these cherished identities at risk. Resistance to these identity threats keeps current workplace norms in place. This is why even the business case-which shows that current practices are not economically efficient-fails to persuade organizations to enact change. What is needed now is sustained attention to the implicit psychological infrastructure that cements the mismatch between today's workplace and today's workforce.

  15. CURRENT CONCEPTS IN ACL RECONSTRUCTION

    Directory of Open Access Journals (Sweden)

    Freddie H. Fu

    2008-09-01

    Full Text Available Current Concepts in ACL Reconstruction is a complete reference text composed of the most thorough collection of topics on the ACL and its surgical reconstruction compiled, with contributions from some of the world's experts and most experienced ACL surgeons. Various procedures mentioned throughout the text are also demonstrated in an accompanying video CD-ROM. PURPOSE Composing a single, comprehensive and complete information source on ACL including basic sciences, clinical issues, latest concepts and surgical techniques, from evaluation to outcome, from history to future, editors and contributors have targeted to keep the audience pace with the latest concepts and techniques for the evaluation and the treatment of ACL injuries. FEATURES The text is composed of 27 chapters in 6 sections. The first section is mostly about basic sciences, also history of the ACL, imaging, clinical approach to adolescent and pediatric patients are subjected. In the second section, Graft Choices and Arthroscopy Portals for ACL Reconstruction are mentioned. The third section is about the technique and the outcome of the single-bundle ACL reconstruction. The fourth chapter includes the techniques and outcome of the double-bundle ACL reconstruction. In the fifth chapter revision, navigation technology, rehabilitation and the evaluation of the outcome of ACL reconstruction is subjected. The sixth/the last chapter is about the future advances to reach: What We Have Learned and the Future of ACL Reconstruction. AUDIENCE Orthopedic residents, sports traumatology and knee surgery fellows, orthopedic surgeons, also scientists in basic sciences or clinicians who are studying or planning a research on ACL forms the audience group of this book. ASSESSMENT This is the latest, the most complete and comprehensive textbook of ACL reconstruction produced by the editorial work up of two pioneer and masters "Freddie H. Fu MD and Steven B. Cohen MD" with the contribution of world

  16. Misestimation of temperature when applying Maxwellian distributions to space plasmas described by kappa distributions

    Science.gov (United States)

    Nicolaou, Georgios; Livadiotis, George

    2016-11-01

    This paper presents the misestimation of temperature when observations from a kappa distributed plasma are analyzed as a Maxwellian. One common method to calculate the space plasma parameters is by fitting the observed distributions using known analytical forms. More often, the distribution function is included in a forward model of the instrument's response, which is used to reproduce the observed energy spectrograms for a given set of plasma parameters. In both cases, the modeled plasma distribution fits the measurements to estimate the plasma parameters. The distribution function is often considered to be Maxwellian even though in many cases the plasma is better described by a kappa distribution. In this work we show that if the plasma is described by a kappa distribution, the derived temperature assuming Maxwell distribution can be significantly off. More specifically, we derive the plasma temperature by fitting a Maxwell distribution to pseudo-data produced by a kappa distribution, and then examine the difference of the derived temperature as a function of the kappa index. We further consider the concept of using a forward model of a typical plasma instrument to fit its observations. We find that the relative error of the derived temperature is highly depended on the kappa index and occasionally on the instrument's field of view and response.

  17. A bottom-up model to describe consumers’ preferences towards late season peaches

    Energy Technology Data Exchange (ETDEWEB)

    Groot, E.; Albisu, L.M.

    2015-07-01

    Peaches are consumed in Mediterranean countries since ancient times. Nowadays there are few areas in Europe that produce peaches with Protected Designation of Origin (PDO), and the Calanda area is one of them. The aim of this work is to describe consumers’ preferences towards late season PDO Calanda peaches in the city of Zaragoza, Spain, by a bottom-up model. The bottom-up model proves greater amount of information than top-down models. In this approach it is estimated one utility function per consumer. Thus, it is not necessary to make assumptions about preference distributions and correlations across respondents. It was observed that preference distributions were neither normal nor independently distributed. If those preferences were estimated by top-down models, conclusions would be biased. This paper also explores a new way to describe preferences through individual utility functions. Results show that the largest behavioural group gathered origin sensitive consumers. Their utility increased if the peaches were produced in the Calanda area and, especially, when peaches had the PDO Calanda brand. In sequence, the second most valuable attribute for consumers was the price. Peach size and packaging were not so important on purchase choice decision. Nevertheless, it is advisable to avoid trading smallest size peaches (weighting around 160 g/fruit). Traders also have to be careful by using active packaging. It was found that a group of consumers disliked this kind of product, probably, because they perceived it as less natural. (Author)

  18. Describing the longitudinal course of major depression using Markov models: Data integration across three national surveys

    Directory of Open Access Journals (Sweden)

    Lee Robert C

    2005-11-01

    Full Text Available Abstract Background Most epidemiological studies of major depression report period prevalence estimates. These are of limited utility in characterizing the longitudinal epidemiology of this condition. Markov models provide a methodological framework for increasing the utility of epidemiological data. Markov models relating incidence and recovery to major depression prevalence have been described in a series of prior papers. In this paper, the models are extended to describe the longitudinal course of the disorder. Methods Data from three national surveys conducted by the Canadian national statistical agency (Statistics Canada were used in this analysis. These data were integrated using a Markov model. Incidence, recurrence and recovery were represented as weekly transition probabilities. Model parameters were calibrated to the survey estimates. Results The population was divided into three categories: low, moderate and high recurrence groups. The size of each category was approximated using lifetime data from a study using the WHO Mental Health Composite International Diagnostic Interview (WMH-CIDI. Consistent with previous work, transition probabilities reflecting recovery were high in the initial weeks of the episodes, and declined by a fixed proportion with each passing week. Conclusion Markov models provide a framework for integrating psychiatric epidemiological data. Previous studies have illustrated the utility of Markov models for decomposing prevalence into its various determinants: incidence, recovery and mortality. This study extends the Markov approach by distinguishing several recurrence categories.

  19. A Comparison of Climatic Chamber Hygrothermal Characterization Techniques as Described in IEC60068

    Science.gov (United States)

    Mac Lochlainn, D.; White, M.; Wettstein, S.; Farley, R.; Aicken, C.; Gee, R.

    2015-08-01

    Techniques for the evaluation of the spatial temperature and humidity performance criteria of climatic chambers are described within the various sections of the International Electrotechnical Commission (IEC) Standard IEC60068 applicable to environmental testing. This paper involves the comparison of three common measurement systems used to assess the performance of climatic chambers, as well as the development of methods for determination of uncertainty contributions, and subsequent propagation into an uncertainty analysis for each method. Methods for validating the performance of these chambers should include specific uncertainty contributions, such as fluctuations, homogeneity, radiation, sampling, and loading effects. These effects are discussed and evaluated as part of this work. The procedure, as detailed in IEC60068, was followed using a chilled-mirror dew-point hygrometer with nine platinum resistance thermometers, nine calibrated RH (relative humidity) and temperature probes, and nine calibrated RH and temperature wireless data logger modules. Loading effect and dew-point uniformity were evaluated empirically and the results discussed. A summary of the results obtained and the associated uncertainty calculations are described and compared. All three systems have their merits, and lower uncertainties in both temperature and %rh were obtained for the chilled-mirror system.

  20. Using Geometry To Sense Current.

    Science.gov (United States)

    McCaughan, Adam N; Abebe, Nathnael S; Zhao, Qing-Yuan; Berggren, Karl K

    2016-12-14

    We describe a superconducting three-terminal device that uses a simple geometric effect known as current crowding to sense the flow of current and actuate a readout signal. The device consists of a "Y"-shaped current combiner, with two currents (sense and bias) entering separately through the top arms of the "Y", intersecting, and then exiting together through the bottom leg of the "Y". When current is added to or removed from one of the arms (e.g., the sense arm), the superconducting critical current in the other arm (i.e., the bias arm) is modulated. The current in the sense arm can thus be determined by measuring the critical current of the bias arm, or inversely, the sense current can be used to modulate the state of the bias arm. The dependence of the bias critical current on the sense current occurs due to the geometric current crowding effect, which causes the sense current to interact locally with the bias arm. Measurement of the critical current in the bias arm does not break the superconducting state of the sense arm or of the bottom leg, and thus, quantized currents trapped in a superconducting loop were able to be repeatedly measured without changing the state of the loop. Current crowding is a universal effect in nanoscale superconductors, and so this device has potential for applicability across a broad range of superconducting technologies and materials. More generally, any technology in which geometrically induced flow crowding exists in the presence of a strong nonlinearity might make use of this type of device.