WorldWideScience

Sample records for extremely important issue

  1. Hospital Contracts: Important Issues for Medical Groups.

    Science.gov (United States)

    Rosolio, Charles E

    2016-01-01

    Relationships with hospitals and outpatient medical facilities have always been an important part of the business model for private medical practices. As healthcare delivery to patients has evolved in the United States (much of it driven by the new government mandates, regulations, and the Affordable Care Act), the delivery of such services is becoming more and more centered on the hospital or institutional setting, thus making contractual relationships with hospitals even more important for medical practices. As a natural outgrowth of this relationship, attention to hospital contracts is becoming more important.

  2. An importance sampling algorithm for estimating extremes of perpetuity sequences

    DEFF Research Database (Denmark)

    Collamore, Jeffrey F.

    2012-01-01

    In a wide class of problems in insurance and financial mathematics, it is of interest to study the extremal events of a perpetuity sequence. This paper addresses the problem of numerically evaluating these rare event probabilities. Specifically, an importance sampling algorithm is described which...... is efficient in the sense that it exhibits bounded relative error, and which is optimal in an appropriate asymptotic sense. The main idea of the algorithm is to use a ``dual" change of measure, which is employed to an associated Markov chain over a randomly-stopped time interval. The algorithm also makes use...

  3. Important issues for perioperative systemic antimicrobial prophylaxis in surgery

    NARCIS (Netherlands)

    Sinha, Bhanu; van Assen, Sander; Friedrich, Alexander W.

    2014-01-01

    PURPOSE OF REVIEW: Prevention of surgical site infections is a key issue to patient safety and the success of surgical interventions. Systemic antimicrobial prophylaxis is one important component of a perioperative infection prevention bundle. This review focuses on selected recent developments and

  4. Privatisation electric power sector in Pakistan: some important issues

    Energy Technology Data Exchange (ETDEWEB)

    Ghafoor, A.; Weiss, J.

    1998-06-01

    This discussion paper highlights important issues relating to the privatisation of Pakistan's electric power sector. Salient features of the electric power sector in Pakistan, factors affecting the economic performance of this sector, the partial privatisation policy adopted by Pakistan, ongoing private power projects, and current privatisation policy are examined. The arguments for competition are raised, and alternative policy reforms the are considered.

  5. Neutrino physics today, important issues and the future

    Energy Technology Data Exchange (ETDEWEB)

    Parke, Stephen J.; /Fermilab

    2010-10-01

    The status and the most important issues in neutrino physics will be summarized as well as how the current, pressing questions will be addressed by future experiments. Since the discovery of neutrino flavor transitions by the SuperKamiokande experiment in 1998, which demonstrates that neutrinos change and hence their clocks tick, i.e. they are not traveling at the speed of light and hence are not massless, the field of neutrino physics has made remarkable progress in untangling the nature of the neutrino. However, there are still many important questions to answer.

  6. Performance testing of supercapacitors: Important issues and uncertainties

    Science.gov (United States)

    Zhao, Jingyuan; Gao, Yinghan; Burke, Andrew F.

    2017-09-01

    Supercapacitors are a promising technology for high power energy storage, which have been used in some industrial and vehicles applications. Hence, it is important that information concerning the performance of supercapacitors be detailed and reliable so system designers can make rational decisions regarding the selection of the energy storage components. This paper is concerned with important issues and uncertainties regarding the performance testing of supercapacitors. The effect of different test procedures on the measured characteristics of both commercial and prototype supercapacitors including hybrid supercapacitors have been studied. It was found that the test procedure has a relatively minor effect on the capacitance of carbon/carbon devices and a more significant effect on the capacitance of hybrid supercapacitors. The device characteristic with the greatest uncertainty is the resistance and subsequently the claimed power capability of the device. The energy density should be measured by performing constant power discharges between appropriate voltage limits. This is particularly important in the case of hybrid supercapacitors for which the energy density is rate dependent and the simple relationship E = ½CV2 does not yield accurate estimates of the energy stored. In general, most of the important issues for testing carbon/carbon devices become more serious for hybrid supercapacitors.

  7. Importance of resolution and model configuration when downscaling extreme precipitation

    Directory of Open Access Journals (Sweden)

    Adrian J. Champion

    2014-07-01

    Full Text Available Dynamical downscaling is frequently used to investigate the dynamical variables of extra-tropical cyclones, for example, precipitation, using very high-resolution models nested within coarser resolution models to understand the processes that lead to intense precipitation. It is also used in climate change studies, using long timeseries to investigate trends in precipitation, or to look at the small-scale dynamical processes for specific case studies. This study investigates some of the problems associated with dynamical downscaling and looks at the optimum configuration to obtain the distribution and intensity of a precipitation field to match observations. This study uses the Met Office Unified Model run in limited area mode with grid spacings of 12, 4 and 1.5 km, driven by boundary conditions provided by the ECMWF Operational Analysis to produce high-resolution simulations for the Summer of 2007 UK flooding events. The numerical weather prediction model is initiated at varying times before the peak precipitation is observed to test the importance of the initialisation and boundary conditions, and how long the simulation can be run for. The results are compared to raingauge data as verification and show that the model intensities are most similar to observations when the model is initialised 12 hours before the peak precipitation is observed. It was also shown that using non-gridded datasets makes verification more difficult, with the density of observations also affecting the intensities observed. It is concluded that the simulations are able to produce realistic precipitation intensities when driven by the coarser resolution data.

  8. Gender and psychopathy: an overview of important issues and introduction to the special issue.

    Science.gov (United States)

    Nicholls, Tonia L; Petrila, John

    2005-01-01

    One of the most important concepts to ever emerge in forensic psychology and law is psychopathy. It would be difficult to exaggerate the profound effect the construct has had on research and practice in correctional psychology, psychiatry, and criminology. Much less pronounced has been an interest in understanding the potential relevance and practical implications that this personality disorder might have for providing insights into antisocial behaviors and crimes committed by girls and women. In this paper we provide an overview of some of the pressing issues confronting clinicians and researchers and provide an introduction to this special issue dedicated to gender and psychopathy. Copyright (c) 2005 John Wiley & Sons, Ltd.

  9. Gymnosporangium Species – An Important Issue of Plant Protection

    Directory of Open Access Journals (Sweden)

    Lāce Baiba

    2017-06-01

    Full Text Available Rusts (Fungi, Basidiomycota, Pucciniomycotina, Pucciniomycetes, Pucciniales are one of the most important causal agents of diseases and they are infecting many plants including cereals and field crops, vegetables, trees and many ornamentals. They have been studied for a long time and have economic importance among the plant diseases caused by agents of different species of fungi. In Europe, thirteen rust genera have been reported, of which the genus Gymnosporangium is the second largest after genus Phragmidium. The most significant fruit tree rust pathogen is the genus Gymnosporangium. The literature review shows quite limited scientific information about this genus and its species. Studies have mainly focused on some stages of the pathogen development cycle, which are significant for the spread of diseases - uredo and teleito stages. Special attention of the review was paid to European pear rust (caused by G. sabinae (Dicks. G. Winter, the distribution of which has increased during the last ten years, especially in organic pear orchards. Currently there is a limited number of scientific publications about European pear rust, and they are mainly based only on observations in vitro without trials in the field, despite the fact that it has become one of the most devastating diseases. Therefore, the presented review analyses the rust exploration history, diversity and distribution of species, life cycle, development biology and plant protection issues.

  10. [Methodological issues in the measurement of alcohol consumption: the importance of drinking patterns].

    Science.gov (United States)

    Valencia Martín, José L; González, M José; Galán, Iñaki

    2014-08-01

    Measurement of alcohol consumption is essential for proper investigation of its effects on health. However, its estimation is extremely complex, because of the diversity of forms of alcohol consumption and their highly heterogeneous classification. Moreover, each form may have different effects on health; therefore, not considering the most important drinking patterns when estimating alcohol intake could mask the important role of consumption patterns in these effects. All these issues make it very difficult to compare the results of different studies and to establish consistent associations for understanding the true effects of alcohol consumption, both overall and specific to each drinking pattern. This article reviews the main methods and sources of information available in Spain for estimating the most important aspects of alcohol consumption, as well as the most frequent methodological problems encountered in the measurement and classification of drinking patterns.

  11. Issue importance as a moderator of framing effects

    NARCIS (Netherlands)

    Lecheler, S.; de Vreese, C.; Slothuus, R.

    2009-01-01

    A growing amount of research is devoted to the question of which individual and contextual variables enhance, limit, or obliterate news framing effects. However, the fundamental question whether framing effects vary depending on the issue at stake has not been addressed. Based on two experimental st

  12. Issue importance as a moderator of framing effects

    NARCIS (Netherlands)

    Lecheler, S.; de Vreese, C.; Slothuus, R.

    2009-01-01

    A growing amount of research is devoted to the question of which individual and contextual variables enhance, limit, or obliterate news framing effects. However, the fundamental question whether framing effects vary depending on the issue at stake has not been addressed. Based on two experimental

  13. Communicating natural hazards. The case of marine extreme events and the importance of the forecast's errors.

    Science.gov (United States)

    Marone, Eduardo; Camargo, Ricardo

    2013-04-01

    possible to produce short and long term forecasts. While the statistic of extremes is useful for many stakeholders, short term forecasts could be of importance for the whole society. Whatever the case, the prediction errors have to be emphasizes even more than the forecasts. The most common forecast in terms of general public understanding is the weather prediction. Nowadays, general public knows it well enough to properly deal with the uncertainties, because after so many year of not perfect forecasts, society knows the limits. Other coastal hazards deserve to be presented more carefully, and some successful example of the use of the precautionary principle could be observed, for instance, on the Pacific Tsunami alert system. Nowadays, the preparedness of the coastal population is good enough (even in such big and diverse area) not to be bored to run up the hill, most of the times unnecessarily, because they know the uncertainty and accept it. The key issue we, scientists, have to work better at any level, is the need of properly estimate and communicate the uncertainties of our results, cause they are not obvious nor irrelevant.

  14. Change in Water Cycle- Important Issue on Climate Earth System

    Science.gov (United States)

    Singh, Pratik

    Change in Water Cycle- Important Issue on Climate Earth System PRATIK KUMAR SINGH1 1BALDEVRAM MIRDHA INSTITUTE OF TECHNOLOGY,JAIPUR (RAJASTHAN) ,INDIA Water is everywhere on Earth and is the only known substance that can naturally exist as a gas, liquid, and solid within the relatively small range of air temperatures and pressures found at the Earth's surface.Changes in the hydrological cycle as a consequence of climate and land use drivers are expected to play a central role in governing a vast range of environmental impacts.Earth's climate will undergo changes in response to natural variability, including solar variability, and to increasing concentrations of green house gases and aerosols.Further more, agreement is widespread that these changes may profoundly affect atmospheric water vapor concentrations, clouds and precipitation patterns.As we know that ,a warmer climate, directly leading to increased evaporation, may well accelerate the hydrological cycle, resulting in an increase in the amount of moisture circulating through the atmosphere.The Changing Water Cycle programmer will develop an integrated, quantitative understanding of the changes taking place in the global water cycle, involving all components of the earth system, improving predictions for the next few decades of regional precipitation, evapotranspiration, soil moisture, hydrological storage and fluxes.The hydrological cycle involves evaporation, transpiration, condensation, precipitation, and runoff. NASA's Aqua satellite will monitor many aspects of the role of water in the Earth's systems, and will do so at spatial and temporal scales appropriate to foster a more detailed understanding of each of the processes that contribute to the hydrological cycle. These data and the analyses of them will nurture the development and refinement of hydrological process models and a corresponding improvement in regional and global climate models, with a direct anticipated benefit of more accurate weather and

  15. Issues in Evaluating Importance Weighting in Quality of Life Measures

    Science.gov (United States)

    Hsieh, Chang-ming

    2013-01-01

    For most empirical research investigating the topic of importance weighting in quality of life (QoL) measures, the prevailing approach has been to use (1) a limited choice of global QoL measures as criterion variables (often a single one) to determine the performance of importance weighting, (2) a limited option of weighting methods to develop…

  16. Design issues for the active control system of the California Extremely Large Telescope (CELT)

    Science.gov (United States)

    Chanan, Gary A.; Nelson, Jerry E.; Ohara, Catherine M.; Sirko, Edwin

    2000-08-01

    We explore the issues in the control and alignment of the primary mirror of the proposed 30 meter California Extremely Large Telescope and other very large telescopes with segmented primaries (consisting of 1000 or more segments). We show that as the number of segments increases, the noise in the telescope active control system (ACS) increases, roughly as (root)n. This likely means that, for a thousand segment telescope like CELT, Keck-style capacitive sensors will not be able to adequately monitor the lowest spatial frequency degrees of freedom of the primary mirror, and will therefore have to be supplemented by a Shack-Hartmann-type wavefront sensor. However, in the case of segment phasing, which is governed by a `control matrix' similar to that of the ACS, the corresponding noise is virtually independent of n. It follows that reasonably straightforward extensions of current techniques should be adequate to phase the extremely large telescopes of the future.

  17. Prenatal imprinting by environmental toxicants: really an important issue?

    Directory of Open Access Journals (Sweden)

    Karl Ernst v. Mühlendahl

    2015-06-01

    Full Text Available Prenatal imprinting of sexual behaviour and of other traits by environmental toxicants has been one important topic in the ongoing discussions in environmental medicine. This review of the literature shows that, so far, concrete data are sparse and, in part, contradictory.

  18. Minimal Clinically Important Difference of Patient Reported Outcome Measures of Lower Extremity Injuries in Orthopedics

    Science.gov (United States)

    Çelik, Derya; Çoban, Özge; Kılıçoğlu, Önder

    2017-01-01

    Purpose: MCID scores for outcome measures are frequently used evidence-based guides to gage meaningful changes. To conduct a systematic review of the quality and content of the the minimal clinically important difference (MCID) relating to 16 patient-rated outcome measures (PROM) used in lower extremity. Methods: We conducted a systematic literature review on articles reporting MCID in lower extremity outcome measures and orthopedics from January 1, 1980, to May 10, 2016. We evaluated MCID of the 16 patient reported outcome measures (PROM) which were Harris Hip Score (HHS), Oxford Hip Score (OHS), Hip Outcome Score (HOS), Hip Disability and Osteoarthritis Outcome Score (HOOS), The International Knee Documentation Committee Subjective Knee Form (IKDC), The Lysholm Scale, The Western Ontario Meniscal Evaluation Tool (WOMET), The Anterior Cruciate Ligament Quality of Life Questionnaire (ACL-QOL), The Lower Extremity Functional Scale (LEFS), The Western Ontario and Mcmaster Universities Index (WOMAC), Knee İnjury And Osteoarthritis Outcome Score (KOOS), Oxford Knee Score (OKS), Kujala Anterior Knee Pain Scale, The Victorian Institute of Sports Assessment Patellar Tendinosis (Jumper’s Knee) (VİSA-P), Tegner Activity Rating Scale, Marx Activity Rating Scale, Foot And Ankle Outcome Score (FAOS), The Foot Function Index (FFI), Foot And Ankle Ability Measure (FAAM), The Foot And Ankle Disability Index Score and Sports Module, Achill Tendon Total Rupture Score(ATRS), The Victorian İnstitute Of Sports Assesment Achilles Questionnaire(VİSA-A), American Orthopaedic Foot and Ankle Society (AOFAS). A search of the PubMed/MEDLINE, PEDro and Cochrane Cen¬tral Register of Controlled Trials and Web of Science databases from the date of inception to May 1, 2016 was conducted. The terms “minimal clinically important difference,” “minimal clinically important change”, “minimal clinically important improvement” “were combined with one of the PROM as mentioned above

  19. Daily temperature extremes play an important role in predicting thermal effects.

    Science.gov (United States)

    Ma, Gang; Hoffmann, Ary A; Ma, Chun-Sen

    2015-07-01

    Organisms in natural environments experience diel temperature fluctuations, including sporadic extreme conditions, rather than constant temperatures. Studies based mainly on model organisms have tended to focus on responses to average temperatures or short-term heat stress, which overlooks the potential impact of daily fluctuations, including stressful daytime periods and milder night-time periods. Here, we focus on daily maximum temperatures, while holding night-time temperatures constant, to specifically investigate the effects of high temperature on demographic parameters and fitness in the English grain aphid Sitobion avenae. We then compared the observed effects of different daily maximum temperatures with predictions from constant temperature-performance expectations. Moderate daily maximum temperatures depressed aphid performance while extreme conditions had dramatic effects, even when mean temperatures were below the critical maximum. Predictions based on daily average temperature underestimated negative effects of temperature on performance by ignoring daily maximum temperature, while predictions based on daytime maximum temperatures overestimated detrimental impacts by ignoring recovery under mild night-time temperatures. Our findings suggest that daily maximum temperature will play an important role in regulating natural population dynamics and should be considered in predictions. These findings have implications for natural population dynamics, particularly when considering the expected increase in extreme temperature events under climate change.

  20. Recognition of an important water quality issue at zoos: prevalence and potential threat of toxic cyanobacteria.

    Science.gov (United States)

    Doster, Enrique; Chislock, Michael F; Roberts, John F; Kottwitz, Jack J; Wilson, Alan E

    2014-03-01

    Zoo animals may be particularly vulnerable to water sources contaminated with cyanobacterial toxins given their nonvoluntary close association with this resource. However, the prevalence and potential threat of toxic cyanobacteria in this setting are unknown. Several otherwise unexplained yellow-bellied slider (Trachemys scripta scripta) deaths were documented in a zoo moat with recurring blooms of toxic Microcystis aeruginosa. Furthermore, an extremely high and potentially lethal concentration of the hepatotoxin microcystin (166 ng/g) was found in the liver of a necropsied turtle that died in this moat. A subsequent monthly survey of water quality revealed detectable concentrations of microcystin in all moats (0.0001 to 7.5 microg/L), with moats higher than 1 microg/L being significantly higher than the threshold for safe drinking water recommended by the World Health Organization. These results demonstrate that cyanobacterial blooms are an important water quality issue in zoos, and future research is necessary to identify potential associations among water quality, zoo animal health, and moat management strategies.

  1. Estimating the Effect of Climate Change on Crop Yields and Farmland Values: The Importance of Extreme Temperatures

    Science.gov (United States)

    This is a presentation titled Estimating the Effect of Climate Change on Crop Yields and Farmland Values: The Importance of Extreme Temperatures that was given for the National Center for Environmental Economics

  2. Extreme climatic events: impacts of drought and high temperature on physiological processes in agronomically important plants

    Directory of Open Access Journals (Sweden)

    Urs eFeller

    2014-10-01

    Full Text Available Climate models predict more frequent and more severe extreme events (e.g. heat waves, extended drought periods, flooding in many regions for the next decades. The impact of adverse environmental conditions on crop plants is ecologically and economically relevant. This review is focused on drought and heat effects on physiological status and productivity of agronomically important plants. Stomatal opening represents an important regulatory mechanism during drought and heat stress since it influences simultaneously water loss via transpiration and CO2 diffusion into the leaf apoplast which further is utilized in photosynthesis. Along with the reversible short-term control of stomatal opening, stomata and leaf epidermis may produce waxy deposits and irreversibly down-regulate the stomatal conductance and non-stomatal transpiration. As a consequence photosynthesis will be negatively affected. Rubisco activase - a key enzyme in keeping the Calvin cycle functional – is heat-sensitive and may become a limiting factor at elevated temperature. The accumulated reactive oxygen species during stress represent an additional challenge under unfavorable conditions. Drought and heat cause accumulation of free amino acids which are partially converted into compatible solutes such as proline. This is accompanied by lower rates of both nitrate reduction and de novo amino acid biosynthesis. Protective proteins (e.g. dehydrins, chaperones, antioxidant enzymes or the key enzyme for proline biosynthesis play an important role in leaves and may be present at higher levels under water deprivation or high temperatures. On the whole plant level, effects on long-distance translocation of solutes via xylem and phloem and on leaf senescence (e.g. anticipated, accelerated or delayed senescence are important. The factors mentioned above are relevant for the overall performance of crops under drought and heat and must be considered for genotype selection and breeding programs.

  3. Cultural evolution: interpersonal influence, issue importance, and the development of shared attitudes in college residence halls.

    Science.gov (United States)

    Cullum, Jerry; Harton, Helen C

    2007-10-01

    This article investigates cultural evolution in four college residence halls. Up to four attitude surveys were completed by 1,252 participants in a semester. Participants' attitudes became more similar to those living closest to them over time as a result of localized interpersonal influence processes. Correlations between attitudes also increased with time as these cultural attributes grew increasingly interdependent. These basic findings support the predictions of dynamic social impact theory. However, these effects were stronger for more important issues even when controlling for discussion. These findings are likely the result of (a) individual-level selective attention to personally important information, (b) greater attitude-behavior consistency for important issues, and/or (c) nonlinear attitude change processes for important issues as suggested by the catastrophe theory of attitudes. These results suggest that intrapsychic processes as well as interpersonal processes contribute to cultural evolution.

  4. Social sustainability of cod and haddock fisheries in the northeast Atlantic: what issues are important?

    NARCIS (Netherlands)

    Veldhuizen, L.J.L.; Berentsen, P.; Bokkers, E.A.M.; Boer, de I.J.M.

    2015-01-01

    Research on the sustainability of capture fisheries has focused more on environmental and economic sustainability than on social sustainability. To assess social sustainability, first relevant and important social sustainability issues need to be identified. The objective of this study was to identi

  5. Special issue on exercise immunology: Current perspectives on aging, health and extreme performance

    NARCIS (Netherlands)

    Simpson, R.J.; Bosch, J.A.

    2014-01-01

    The aim of this special issue is to highlight outstanding exemplars of empirical research and review papers that reflect the breadth of current developments in exercise immunology. The contributions to this issue are categorized according to four major themes: (1) exercise and immune-aging; (2) the

  6. Upper Extremity Artificial Limb Control as an Issue Related to Movement and Mobility in Daily Living

    Science.gov (United States)

    Wallace, Steve; Anderson, David I.; Trujillo, Michael; Weeks, Douglas L.

    2005-01-01

    The 1992 NIH Research Planning Conference on Prosthetic and Orthotic Research for the 21st Century (Childress, 1992) recognized that the field of prosthetics lacks theoretical understanding and empirical studies on learning to control an upper-extremity prosthesis. We have addressed this problem using a novel approach in which persons without…

  7. Topical issues of psychological research materials on matters related to extremism

    Directory of Open Access Journals (Sweden)

    Sekerazh T.N.

    2014-12-01

    Full Text Available The article deals with methodological support psychological and linguistic research "extremist" materials. Presents a comprehensive psycho-linguistic approach to the examination of information materials on matters related to combating extremism and terrorism, and certain provisions of the methodology developed by the Russian federal center of judicial examination of the Ministry of Justice of the Russian Federation. Based on the analysis of the "verbal" crimes related to criminal legal interpretation of extremism and terrorism, highlighted the types of prohibited public expression of communicative action, corresponding to the seven types of "extremist" values. The article outlines the key features of psychological analysis "extremist" materials research stages. It is shown that the complex (psycho-linguistic approach to the study of materials of extremist orientation, is scientifically sound, methodically proven, appropriate to the needs of law enforcement, judicial and investigative practice.

  8. On the importance of observational data properties when assessing regional climate model performance of extreme precipitation

    DEFF Research Database (Denmark)

    Sunyer Pinya, Maria Antonia; Sørup, Hjalte Jomo Danielsen; Christensen, Ole Bøssing

    2013-01-01

    In recent years, there has been an increase in the number of climate studies addressing changes in extreme precipitation. A common step in these studies involves the assessment of the climate model performance. This is often measured by comparing climate model output with observational data....... In the majority of such studies the characteristics and uncertainties of the observational data are neglected. This study addresses the influence of using different observational datasets to assess the climate model performance. Four different datasets covering Denmark using different gauge systems and comprising...... both networks of point measurements and gridded datasets are considered. Additionally, the influence of using different performance indices and metrics is addressed. A set of indices ranging from mean to extreme precipitation properties is calculated for all the datasets. For each of the observational...

  9. Complexity and reflexivity: two important issues for economic evaluation in health care.

    Science.gov (United States)

    Lessard, Chantale

    2007-04-01

    Economic evaluations are analytic techniques to assess the relative costs and consequences of health care programmes and technologies. Their role is to provide rigorous data to inform the health care decision-making process. Economic evaluation may oversimplify complex health care decisions. These analyses often ignore important health consequences, contextual elements, relationships or other relevant modifying factors, which might not be appropriate in a multi-objective, multi-stakeholder issue. One solution would be to develop a new paradigm based on the issues of perspective and context. Complexity theory may provide a useful conceptual framework for economic evaluation in health care. Complexity thinking develops an awareness of issues including uncertainty, contextual issues, multiple perspectives, broader societal involvement, and transdisciplinarity. This points the economic evaluation field towards an accountability and epistemology based on pluralism and uncertainty, requiring new forms of lay-expert engagement and roles of lay knowledge into decision-making processes. This highlights the issue of reflexivity in economic evaluation in health care. A reflexive approach would allow economic evaluators to analyze how objective structures and subjective elements influence their practices. In return, this would point increase the integrity and reliability of economic evaluations. Reflexivity provides opportunities for critically thinking about the organization and activities of the intellectual field, and perhaps the potential of moving in new, creative directions. This paper argues for economic evaluators to have a less positivist attitude towards what is useful knowledge, and to use more imagination about the data and methodologies they use.

  10. A life cycle model of public policy issues in health care: the importance of strategic issues management.

    Science.gov (United States)

    Rakich, J S; Feit, M D

    2001-01-01

    Public policy affects health and social services organizations. Senior management has a responsibility to prevent inappropriate demands of stakeholders from predominating and to influence the outcome of public policy to the benefit of their organization through the strategic issues management process. This article presents a public policy issue life cycle model, life-cycle stages and suggested strategies, paths issues can take in the life cycle, and factors that affect issue paths. An understanding of these dynamics can aid senior managers in shaping and changing public policy issues and lessening external environment threats to their organization.

  11. On the importance of cloud—cloud interaction to invigorate convective extremes

    Science.gov (United States)

    Berg, Peter; Moseley, Christopher; Hohenegger, Cathy; Haerter, Jan

    2017-04-01

    Observational studies have shown that convective extremes are invigorated with increasing temperatures beyond thermodynamic constraints through the Clausius-Clapeyron relationship (e.g. Lenderink and van Meijgaard, Nature Geosci., 2008; Berg et al., Nature Geosci., 2013). This implies that there are changes in the dynamics of the convective showers that are dependent on the environmental conditions. Observations of convective cells lack sufficient resolution to investigate the dynamics in detail. We have therefore applied a large eddy simulator (LES) at a 200 m horizontal resolution to study the dynamical interaction between convective cells in a set of idealized simulations of a full diurnal cycle with a vertical profile of a typical day with convective showers (Moseley et al., Nature Geosci., 2016). The simulations show that the convective cells are subjected to a gradual self-organization over the day, forming larger cell clusters and more intense precipitation. Further, by tracking rain cells, we find that cells that collide with other cells during their lifetime have a different response to changes in the environmental conditions, such as an increase in temperature, than cells that do not interact. Whereas the non-interacting cells remain almost unaffected by the boundary conditions, the colliding cells show a strong invigoration. Interestingly, granting more time for the self-organization to occur has a similar effect as increasing the temperature. We therefore speculate that self-organization is a key element to explain the strong response of convective extremes to increasing temperature. Our results suggest that proper modeling and predicting of convective extremes requires the description of the interaction between convective clouds.

  12. Socio-economic hazards and impacts of space weather: the important range between mild and extreme

    CERN Document Server

    Schrijver, Carolus J

    2015-01-01

    Society needs to prepare for more severe space weather than it has experienced in the modern technological era. To enable that, we must both quantify extreme-event characteristics and analyze impacts of lesser events that are frequent yet severe enough to be informative. Exploratory studies suggest that economic impacts of a century-level space hurricane and of a century of lesser space-weather "gales" may turn out to be of the same order of magnitude. The economic benefits of effective mitigation of the impacts of space gales may substantially exceed the required investments, even as these investments provide valuable information to prepare for the worst possible storms.

  13. Transcultural group performance in extreme environment: Issues, concepts and emerging theory

    Science.gov (United States)

    Lapierre, Judith; Bouchard, Stéphane; Martin, Thibault; Perreault, Michel

    2009-06-01

    A simulation for flight of international crew on space station took place in Moscow from July 1999 to April 2000 (SFINCS) at the State Biomedical Institute of Russia (IBMP) isolation chambers. Objectives of this study were to identify concepts of psychosocial adaptation and of social interactions to develop an explanation of the transcultural group performance. Method: constructivist epistemology with grounded theory research and fourth generation evaluation were used. Data on processes and interactions were gathered during 110 days of confinement as a subject and extended to 240 days as an outside scientist. Results indicate that coping is influenced by usual coping strategies and coping behaviors inside. Several stresses and human factor issues were identified altering well being and performance inside the chambers. Enabling and limiting forces are discussed. A theory on transcultural group performance is proposed. Issues are raised that appear critical to selection, training and group performance.

  14. Charged D3-D7 plasmas: novel solutions, extremality and stability issues

    CERN Document Server

    Bigazzi, Francesco; Tarrio, Javier

    2013-01-01

    We study finite temperature N=4 Super Yang-Mills (and more general gauge theories realized on intersecting D3-D7 branes) in the presence of dynamical massless fundamental matter fields at finite baryon charge density. We construct the holographic dual charged black hole solutions at first order in the flavor backreaction but exact in the charge density. The thermodynamical properties of the dual gauge theories coincide with the ones found in the usual charged D7-probe limit and the system turns out to be thermodynamically stable. By analyzing the higher order correction in the flavor backreaction, we provide a novel argument for the un-reliability of the charged probe approximation (and the present solution) in the extremality limit, i.e. at zero temperature. We then consider scalar mesonic-like bound states, whose spectrum is dual to that of linearized fluctuations of D7-brane worldvolume fields around our gravity backgrounds. In particular we focus on a scalar field saturating the Breitenlohner-Freedman bou...

  15. Commentary on the special issue on the adolescent brain: Adolescence, trajectories, and the importance of prevention

    Science.gov (United States)

    2017-01-01

    Adolescence as highlighted in this special issue is a period of tremendous growth, synaptic exuberance, and plasticity, but also a period for the emergence of mental illness and addiction. This commentary aims to stimulate research on prevention science to reduce the impact of early life events that often manifest during adolescence. By promoting a better understanding of what creates a normal and abnormal trajectory, the reviews by van Duijvenvoorde et al., Kilford et al., Lichenstein et al., and Tottenham and Galvan in this special issue comprehensively describe how the adolescent brain develops under typical conditions and how this process can go awry in humans. Preclinical reviews also within this issue describe how adolescents have prolonged extinction periods to maximize learning about their environment (Baker et al.), whereas Schulz and Sisk focus on the importance of puberty and how it interacts with stress (Romeo). Caballero and Tseng then set the stage of describing the neural circuitry that is often central to these changes and psychopathology. Factors that affect the mis-wiring of the brain for illness, including prenatal exposure to anti-mitotic agents (Gomes et al.) and early life stress and inflammation (Schwarz and Brenhouse), are included as examples of how exposure to early adversity manifests. These reviews are synthesized and show how information from the maturational stages that precede or occur during adolescence is likely to hold the key towards optimizing development to produce an adolescent and adult that is resilient and well adapted to their environment. PMID:27423540

  16. The Importance of the Prenatal Environment in Behavioral Genetics: Introduction to Special Issue.

    Science.gov (United States)

    Knopik, Valerie S; Neiderhiser, Jenae M; de Geus, Eco; Boomsma, Dorret

    2016-05-01

    We introduce and discuss a special issue on prenatal factors in genetics research, that includes 14 papers ranging from studies on chorionicity, smoking during pregnancy, and more general prenatal risks to papers about theory, methods and measurement. There are two review papers, one focused on chorioncity and the second on pre- and perinatal ischemia-hypoxia, that help to frame the state of research in these areas with a focus on the relevance across multiple fields of study. Taken together, these papers clearly demonstrate the importance of considering prenatal environment influences on functioning in offspring across the lifespan while also underscoring the importance of using genetically informed designs as a means to clarify causality.

  17. Importance of a midterm time horizon for addressing ethical issues integral to nanobiotechnology.

    Science.gov (United States)

    Khushf, George

    2007-01-01

    There is a consensus emerging on the importance of upstream ethical engagement in nanobiotechnology. Such a preventive ethic would anticipate downstream concerns that might arise and mitigate them as part of the research and development process. However, there is an unappreciated tension between the time horizon of upstream ethics and that assumed by most bioethical research. Current standards of high-quality research on ethical issues biases the research in favor of near-term, science-based, results-oriented work. A near-term focus would miss many of the important ethical issues integral to nanobiotechnology and undermine the goals integral to upstream ethical engagement. However, if we move to a far-term time horizon, the ethical debates tend to get too speculative and are no longer disciplined by existing research trajectories. This paper addresses the link between the midterm time horizon necessary for upstream ethics and the form, content, and style of ethical reflection. New paradigm cases, standards, and criteria will be needed for high-quality upstream ethics work in the area of nanobiotechnology.

  18. Human Resource Management in Sports: A Critical Review of its Importance and Pertaining Issues

    Directory of Open Access Journals (Sweden)

    Weerakoon Ranjan Kumara

    2016-03-01

    Full Text Available This paper will illustrate the meaning and importance of human resource management (HRM, human resource planning, and strategic human resource management, which are critically important for an organization’s effectiveness and must be effectively managed (Doherty, 1998. This study used the literature review method to acquire its final results. The relevant HRM literature review was done according to the purpose of the study. It used the purposive random sample method for selecting relevant literature. This study shows the current economic environment in the sports industry; the second part of the study critically analyzes the value of the strategic management of employees for the effective and efficient operation of sports organizations. It also critically evaluates human resource planning and other pertinent issues in terms of legislation, recruitment, selection, training, induction, and reward management from different international examples in sports management. Over the past few decades, increasing competition, globalization, and continuous changes in the market and in technology have emphasized the need to rethink the management of the organization and of human resources for the sake of overcoming significant challenges (Taylor et al., 2006. Therefore, managers should use strategic human resource management to overcome significant issues and to form well-planned strategies so that the organization may succeed.

  19. Language issues: an important professional practice dimension for Australian International Medical Graduates.

    Science.gov (United States)

    McGrath, Pam; Henderson, David; Holewa, Hamish

    2013-01-01

    Issues associated with speech and language have been noted in the international literature as an important aspect of the process of integration for Australian International Medical Graduates (IMGs). This paper makes a contribution through the presentation of a sub-set of findings on the factors associated with speech and language practices for IMGs, taken from a qualitative study which examined the IMGs' experience of integration into the Australian healthcare system. A purposive sample of 30 IMGs were interviewed via telephone. Participants were asked to share their experience with communicating in English with patients and other health professionals in the context of the Australian healthcare system. The taped interviews were transcribed verbatim and then coded and thematically analysed. The findings indicate that the months following the point of entry into a medical position are a critical time for the majority of IMGs in terms of difficulties with communicating in English. A range of suggestions to improve speech and language skills for IMGs is provided. The findings emphasize the importance of speech and language skills and the serious implications of this issue for the clinical practice of IMGs.

  20. Transcranial Direct Current Stimulation: Five Important Issues We Aren’t Discussing (But Probably Should Be

    Directory of Open Access Journals (Sweden)

    Jared Cooney Horvath

    2014-01-01

    Full Text Available Transcranial Direct Current Stimulation (tDCS is a neuromodulatory device often publicized for its ability to enhance cognitive and behavioral performance. These enhancement claims, however, are predicated upon electrophysiological evidence and descriptions which are far from conclusive. In fact, a review of the literature reveals a number of important experimental and technical issues inherent with this device that are simply not being discussed in any meaningful manner. In this paper, we will consider five of these topics. The first, inter-subject variability, explores the extensive between- and within-group differences found within the tDCS literature and highlights the need to properly examine stimulatory response at the individual level. The second, intra-subject reliability, reviews the lack of data concerning tDCS response reliability over time and emphasizes the importance of this knowledge for appropriate stimulatory application. The third, sham stimulation and blinding, draws attention to the importance (yet relative lack of proper control and blinding practices in the tDCS literature. The fourth, motor and cognitive interference, highlights the often overlooked body of research that suggests typical behaviors and cognitions undertaken during or following tDCS can impair or abolish the effects of stimulation. Finally, the fifth, electric current influences, underscores several largely ignored variables (such as hair thickness and electrode attachments methods influential to tDCS electric current density and flow.Through this paper, we hope to increase awareness and start an ongoing dialogue of these important issues which speak to the efficacy, reliability, and mechanistic foundations of tDCS.

  1. Putting a human face on cold, hard facts: Effects of personalizing social issues on perceptions of issue importance

    NARCIS (Netherlands)

    Grabe, M.E.; Kleemans, M.; Bas, O.; Myrick, J.G.; Kim, M.

    2017-01-01

    This study investigates the influence of personalization (moving testimony from ordinary citizens) on reception of news stories about social issues. The data (N = 80) from this mixed-design experiment, collected at two time points, offer evidence that personalized news stories evoked greater feeling

  2. Commentary on the special issue on the adolescent brain: Adolescence, trajectories, and the importance of prevention.

    Science.gov (United States)

    Andersen, Susan L

    2016-11-01

    Adolescence as highlighted in this special issue is a period of tremendous growth, synaptic exuberance, and plasticity, but also a period for the emergence of mental illness and addiction. This commentary aims to stimulate research on prevention science to reduce the impact of early life events that often manifest during adolescence. By promoting a better understanding of what creates a normal and abnormal trajectory, the reviews by van Duijvenvoorde et al., Kilford et al., Lichenstein et al., and Tottenham and Galvan in this special issue comprehensively describe how the adolescent brain develops under typical conditions and how this process can go awry in humans. Preclinical reviews also within this issue describe how adolescents have prolonged extinction periods to maximize learning about their environment (Baker et al.), whereas Schulz and Sisk focus on the importance of puberty and how it interacts with stress (Romeo). Caballero and Tseng then set the stage of describing the neural circuitry that is often central to these changes and psychopathology. Factors that affect the mis-wiring of the brain for illness, including prenatal exposure to anti-mitotic agents (Gomes et al.) and early life stress and inflammation (Schwarz and Brenhouse), are included as examples of how exposure to early adversity manifests. These reviews are synthesized and show how information from the maturational stages that precede or occur during adolescence is likely to hold the key towards optimizing development to produce an adolescent and adult that is resilient and well adapted to their environment. Copyright © 2016 Elsevier Ltd. All rights reserved.

  3. Important project financing by issue of bonds in the Federation of Bosnia and Herzegovina

    Directory of Open Access Journals (Sweden)

    Lazar Dreč

    2016-11-01

    Full Text Available This article deals with the development of the Federation of Bosnia and Herzegovina based on the opening of infrastructure facilities for which funding is proposed to incorporate the issue of securities, primarily government bonds because there is a real basis for its demand deriving by banks, citizens and other organizations and institutions. The basic conditions for the functioning model of financing development and strategic projects by issuing securities herein include: a accelerate reforms and create the legal framework that will allow the establishment of important missing institutions for the business sector, b more efficient functioning of the executive and legislative bodies in Bosnia and Herzegovina on creating a favourable business environment, c the implementation of identified strategic commitment from all levels of government in relation to the creation of a single economic space, labour market, harmonization of entity policies and other policies that influence the overall business environment, d the development of infrastructure projects and power facilities, and e the inclusion of private funding and knowledge aimed at improving the construction and management of roads.

  4. [Johann Friedrich Meckel the Younger (1781-1833), an extremely important naturalist and scholar].

    Science.gov (United States)

    Schultka, Rüdiger; Göbbel, Luminita

    2002-11-01

    Johann Friedrich Meckel the Younger (1781-1833) belongs to the famous scientists of the 19th century. His research work is enormous. Important termini e.g. diverticulum Meckelii, cartilago Meckelii, Meckel syndrome and Meckel Serres law reflect the scientific results obtained by Meckel. He worked as a professor of anatomy, pathology and zoology at the University of Halle, a town in the Central Germany. Meckel founded the scientific teratology. In the literature he is also referred to the German Cuvier. On 8 April 1802, J. F. Meckel defended his doctoral thesis "De cordis conditionibus abnormibus". On occasion of the 200th anniversary of this event, we like to honor J. F. Meckel the famous German anatomist. Therefore, during the 97th session of the Anatomische Gesellschaft at Halle, a satellite symposium "From Meck el to genom" was held.

  5. Representing ozone extremes in European megacities: the importance of resolution in a global chemistry climate model

    Directory of Open Access Journals (Sweden)

    Z. S. Stock

    2013-10-01

    Full Text Available The continuing growth of the world's urban population has led to an increasing number of cities with more than 10 million inhabitants. The higher emissions of pollutants, coupled to higher population density, makes predictions of air quality in these megacities of particular importance from both a science and a policy perspective. Global climate models are typically run at coarse resolution to enable both the efficient running of long time integrations, and the ability to run multiple future climate scenarios. However, when considering surface ozone concentrations at the local scale, coarse resolution can lead to inaccuracies arising from the highly non-linear ozone chemistry and the sensitivity of ozone to the distribution of its precursors on smaller scales. In this study, we use UM-UKCA, a global atmospheric chemistry model, coupled to the UK Met Office Unified Model, to investigate the impact of model resolution on tropospheric ozone, ranging from global to local scales. We focus on the model's ability to represent the probability of high ozone concentrations in the summer and low ozone concentrations, associated with polluted megacity environments, in the winter, and how this varies with horizontal resolution. We perform time-slice integrations with two model configurations at typical climate resolution (CR, ~150 km and at a higher resolution (HR, ~40 km. The CR configuration leads to overestimation of ozone concentrations on both regional and local scales, while it gives broadly similar results to the HR configuration on the global scale. The HR configuration is found to produce a more realistic diurnal cycle of ozone concentrations and to give a better representation of the probability density function of ozone values in urban areas such as the megacities of London and Paris. We discuss the possible causes for the observed difference in model behaviour between CR and HR configurations and estimate the relative contribution of chemical and

  6. How issue frames shape beliefs about the importance of climate change policy across ideological and partisan groups.

    Science.gov (United States)

    Singh, Shane P; Swanson, Meili

    2017-01-01

    We use an experiment to examine whether the way in which climate change is framed affects individuals' beliefs about its importance as a policy issue. We employ frames that emphasize national security, human rights, and environmental importance about the consequences of climate change. We find no evidence that issue frames have an overall effect on opinions about the importance of climate change policy. We do find some evidence that the effect of issue frames varies across ideological and partisan groups. Most notably, issue frames can lead Republicans and those on the political right to view climate change policy as less important. We conclude by discussing our findings relative to extant literature and considering the implications of our findings for those who seek to address the issue of climate change.

  7. The importance of health advocacy in Canadian postgraduate medical education: current attitudes and issues

    Directory of Open Access Journals (Sweden)

    Alexander Poulton

    2015-12-01

    Full Text Available Background: Health advocacy is currently a key component of medical education in North America. In Canada, Health Advocate is one of the seven roles included in the Royal College of Physicians and Surgeons of Canada’s CanMEDS competency framework. Method: A literature search was undertaken to determine the current state of health advocacy in Canadian postgraduate medical education and to identify issues facing educators and learners with regards to health advocacy training. Results:  The literature revealed that the Health Advocate role is considered among the least relevant to clinical practice by educators and learners and among the most challenging to teach and assess. Furthermore learners feel their educational needs are not being met in this area. A number of key barriers affecting health advocacy education were identified including limited published material on the subject, lack of clarity within the role, insufficient explicit role modeling in practice, and lack of a gold standard for assessment. Health advocacy is defined and its importance to medical practice is highlighted, using pediatric emergency medicine as an example. Conclusions: Increased published literature and awareness of the role, along with integration of the new 2015 CanMEDS framework, are important going forward to address concerns regarding the quality of postgraduate health advocacy education in Canada.

  8. Important and Critical Issues of Complying Presentation Based Upon Letter of Credit (L/C Payment

    Directory of Open Access Journals (Sweden)

    Ömer Özkan

    2016-12-01

    Full Text Available In this study, there is suggested proposals and determined about such a way must be followed in complying presentation in accordance with letter of credit payment and the faults of exporting companies specific to Turkey in this issue. Beneficiary needs to provide complying presentation after preparing the papers appropriately at first letter of credit terms, rules of UCP 600 and ISBP 745 for applicant bank and if available confirming bank’s pay obligation could continue against beneficiary company in letter of credit payment. Since provided complying presentation ability requires a certain level of experience and expertness; it is observed about exporter companies in Turkey localized, receive export prices late and pay extra charges/commissions, could not benefit from pay obligation guarantee of applicant bank and if available confirming bank because of their generally discrepant document, facing contradiction in terms on this complying document preparing. Moreover, a various letter of credit condition which are disadvantages of exporters and could be caused financial losses are discussed and includes advices in this study. Based upon the findings, there is determined about most important reason of the companies could not provide complying presentation is preparing certain documents within letter of credit conditions incorrect, and it is shown how to prepare the subjected documents appropriately to letter of credit payment as considering their main and critical properties.

  9. Current issues in dental practice management. Part 1. The importance of shared values.

    Science.gov (United States)

    Newsome, Philip R H

    2003-04-01

    /1997 when NHS fees stood at 1.6 billion Pounds (71%) and private fees at 0.6 billion Pounds (29%) and it can be seen that while the size of the whole market has grown NHS fees have risen by around 18% while private sector fees have gone up by 64% during the same period. It cannot be said therefore that NHS dentistry has disappeared although it is clear that access to NHS dentistry has been and may still be difficult in some parts of the country. The Department of Health in England has responded by developing 'access centres' and in the recently published Options for Change sets out sweeping proposals to revitalise NHS dentistry and delegate decisions over funding to a local level. It is far from clear what the consequences of these changes will be. However, one possible scenario is that in many parts of the UK, although relief of pain, prevention and restoration of function will be funded by the NHS, other than in 'special circumstances' such as after trauma and inherited conditions 'cosmetic embellishment' will not be funded. In which case, ever increasing public interest in personal appearance may well lead to further growth in private dentistry. Against a background of change and uncertainty, this series of articles explores some of the issues facing dentists coming to terms with working in this brave new world. This first part examines an aspect of dental practice that is seldom discussed openly and yet is of such fundamental importance that it is the cornerstone of all successful practices and the main fault line in unsuccessful ones, namely the nature and strength of practice values.

  10. From extreme pH to extreme temperature: An issue in honor of the geochemical contributions of Kirk Nordstrom, USGS hydrogeochemist

    Science.gov (United States)

    Campbell, Kate M.; Verplanck, Philip L.; McCleskey, R. Blaine; Alpers, Charles N.

    2015-01-01

    This special issue of Applied Geochemistry honors Dr. D. Kirk Nordstrom, and his influential career spent primarily at the U.S. Geological Survey (USGS). This issue does not herald his retirement or other significant career milestone, but serves as a recognition of the impact his work has had on the field of geochemistry in general. This special issue grew from a symposium in Kirk’s honor (affectionately dubbed “Kirkfest”) at the Geological Society of America’s annual meeting in Denver, Colorado, USA, during October 2013. At GSA, 27 talks and 35 posters showed how Kirk’s work has influenced a wide range of current hydrogeochemical research, from geothermal processes to acid mine drainage to geochemical modeling. The breadth of his knowledge and his many contributions to the published literature have left an indelible mark on the field of geochemistry, and this special issue is a tribute to his experience and contributions.

  11. 75 FR 34687 - Notice of Decision to Issue Permits for the Importation of Fresh False Coriander From Panama Into...

    Science.gov (United States)

    2010-06-18

    ... Fresh False Coriander From Panama Into the Continental United States AGENCY: Animal and Plant Health... issuing permits for the importation into the continental United States of fresh false coriander from... noxious weeds via the importation of fresh false coriander from Panama. EFFECTIVE DATE: June 18, 2010....

  12. 75 FR 52712 - Notice of Decision To Issue Permits for the Importation of Fresh Mango Fruit From Pakistan Into...

    Science.gov (United States)

    2010-08-27

    ... Fresh Mango Fruit From Pakistan Into the Continental United States AGENCY: Animal and Plant Health... issuing permits for the importation into the continental United States of fresh mango fruit from Pakistan... weeds via the importation of fresh mango fruit from Pakistan. DATES: Effective Date: August 27, 2010...

  13. Vygotsky on Imagination: Why an Understanding of the Imagination Is an Important Issue for Schoolteachers

    Science.gov (United States)

    Gajdamaschko, Natalia

    2005-01-01

    Lev Vygotsky was an educational theorist and psychologist of extraordinarily wide knowledge whose major writings deal with the entire learning-teaching-development enterprise. Despite wide-ranging interests towards Vygotskian theory, the issue of imagination remains outside of the main line of the general inquiries. Thus there is a gap in that…

  14. A Detailed Analysis over Some Important Issues towards Using Computer Technology into the EFL Classrooms

    Science.gov (United States)

    Gilakjani, Abbas Pourhosein

    2014-01-01

    Computer technology has changed the ways we work, learn, interact and spend our leisure time. Computer technology has changed every aspect of our daily life--how and where we get our news, how we order goods and services, and how we communicate. This study investigates some of the significant issues concerning the use of computer technology…

  15. Journal of Transdisciplinary Environmental Studies : Special Issue on The Importance of Local Knowledge and Interdisciplinary Research

    DEFF Research Database (Denmark)

    For this special issue of TES we have selected four articles on constraints and options for managing trees in Africa. The articles have been produced within a larger multidisciplinary research programme on People, Trees and Agriculture in Africa (Petrea) funded by the Danish Development Research...

  16. Journal of Transdisciplinary Environmental Studies : Special Issue on The Importance of Local Knowledge and Interdisciplinary Research

    DEFF Research Database (Denmark)

    For this special issue of TES we have selected four articles on constraints and options for managing trees in Africa. The articles have been produced within a larger multidisciplinary research programme on People, Trees and Agriculture in Africa (Petrea) funded by the Danish Development Research...

  17. Rational use of medicines--an important issue in pharmaceutical policy

    DEFF Research Database (Denmark)

    Almarsdóttir, Anna Birna; Traulsen, Janine Marie

    2005-01-01

    and interpretations are presented and compared. This is followed by a presentation of the concerns associated with pharmaceutical marketing from a policy perspective, including the fear that the dominance of information produced by industry may lead to irrational drug use. Next, the authors review the tools...... to adapt its way of thinking to include the issue of context. They point out that clinical pharmacists today already adapt their decisons to each patient and patient group. Policy-makers are encouraged to adopt a similar approach because populations as well as particular market situations vary......In this article the authors deal with issues of drug utilisation from a clinical and policy perspective. They address the difficulties of managing drug therapy on a population level, which is known among professionals, as the problem of rational use of medicines. Various definitions...

  18. Aspirations, challenges, and open issues for software-based 5G networks in extremely dense and heterogeneous scenarios

    National Research Council Canada - National Science Library

    M. Borges, Vinicius C; Cardoso, Kleber Vieira; Cerqueira, Eduardo; Nogueira, Michele; Santos, Aldri

    2015-01-01

    An upsurge of heterogeneous wireless devices and wide-ranging applications on extremely dense urban scenarios has led to challenging conditions that cannot be easily handled by 4G systems, such as the...

  19. IMPORTANCE OF THE WELFARE FACILITIES IN THE WORKPLACE: ISSUES IN PERSPECTIVES

    Directory of Open Access Journals (Sweden)

    Olufunmilayo F. Odeku

    2015-06-01

    Full Text Available Welfare facilities and services for employees are increasingly becoming important in organisations. Employees are a major determinant of the success of any organisation, therefore, a company’s success is not only measured by the margins and profits it declares, but also by the state of well-being of the workers. This article looks at the importance of welfare facilities and services to the workforce and the need for an organisation to ensure they provide statutory welfare schemes and non-statutory welfare schemes for their employees. The article accentuates the importance of implementation of welfare schemes and the consequences for failure of implementation.

  20. ON THE ISSUE OF IMPORT SUBSTITUTION OF DEEP PROCESSING PRODUCTS FROM GRAIN AND POTATO

    Directory of Open Access Journals (Sweden)

    N. R. Andreev

    2014-01-01

    Full Text Available Summary. The analysis of structure of starch containing raw materials processing in Russia Federation is provided in the article. There was noted an increase in volumes of corn and wheat processing, however the share of processed potato is still low (below 4%. It was established that Russian starch products and starch sweeteners are on the same level on quality as best European samples and they are very competitive. Market demand in crystalline glucose for food and medical purposes (over 30 thous. tons is fully covered by import. The volume of import of modified starches exceeds 80 % of total consumption. The biggest volume of import among native starches belongs to potato starch – over 60 %. The article provides suggestions on import substitution of mentioned starch products. The growth of starch production in Russia was accompanied by concentration of production at large enterprises. So, in 2013 over 90 % of glucose syrup was produced at six enterprises, over 80 % of dry starch – at five enterprises. Efficiency of corn and wheat processing into starch and starch products is achieved by production and selling of co-products (dry gluten, gluten, corn germ or corn oil, corn extract, feed products.Development of starch sweeteners production from starch could be achieved by expanding the consumption areas of different kinds of glucose syrup and production of glucose-fructose syrups as full substitute of sugar, providing import substitution of sugar, crystalline glucose of food and medicine purpose, deep processing of glucose into polyols (sorbit, maltit, polylactites, aminoacids.

  1. Grid connectivity issues and the importance of GCC. [GCC - Grid Code Compliance

    Energy Technology Data Exchange (ETDEWEB)

    Das, A.; Schwartz, M.-K. [GL Renewable Certification, Malleswaram, Bangalore (India)

    2012-07-01

    In India, the wind energy is concentrated in rural areas with a very high penetration. In these cases, the wind power has an increasing influence on the power quality on the grids. Another aspect is the influence of weak grids on the operation of wind turbines. Hence it becomes very much essential to introduce such a strong grid code which is particularly applicable to wind sector and suitable for Indian environmental grid conditions. This paper focuses on different international grid codes and their requirement with regard to the connection of wind farms to the electric power systems to mitigate the grid connectivity issues. The requirements include the ways to achieve voltage and frequency stability in the grid-tied wind power system. In this paper, comparative overview and analysis of the main grid connecting requirements will be conducted, comprising several national and regional codes from many countries where high wind penetration levels have been achieved or are expected in the future. The objective of these requirements is to provide wind farms with the control and regulation capabilities encountered in conventional power plants and are necessary for the safe, reliable and economic operation of the power system. This paper also provides a brief idea on the Grid Code Compliance (GCC) certification procedure implemented by the leading accredited certifying body like Germanischer Lloyd Renewables Certification (GL RC), who checks the conformity of the wind turbines as per region specific grid codes. (Author)

  2. Brand names of Portuguese medication: understanding the importance of their linguistic structure and regulatory issues

    Directory of Open Access Journals (Sweden)

    Carla Pires

    2015-08-01

    Full Text Available AbstractAmong other regulatory requirements, medicine brands should be composed of single names without abbreviations to prevent errors in prescription of medication. The purposes of the study were to investigate the compliance of a sam ple of Portuguese medicine brand names with Portuguese pharmaceutical regulations. This includes identifying their basic linguistic characteristics and comparing these features and their frequency of occurrence with benchmark values of the colloquial or informal language. A sample of 474 brand names was selected. Names were analyzed using manual (visual analyses and computer methods (FreP - Frequency Patterns of Phonological Objects in Portuguese and MS word. A significant number of names (61.3% failed to comply with the Portuguese phonologic system (related to the sound of words and/or the spelling system (related to the written form of words contained more than one word, comprised a high proportion of infrequent syllable types or stress patterns and included abbreviations. The results suggest that some of the brand names of Portuguese medication should be reevaluated, and that regulation on this issue should be enforced and updated, taking into consideration specific linguistic and spelling codes.

  3. Brand names of Portuguese medication: understanding the importance of their linguistic structure and regulatory issues.

    Science.gov (United States)

    Pires, Carla; Vigário, Marina; Cavaco, Afonso

    2015-08-01

    Among other regulatory requirements, medicine brands should be composed of single names without abbreviations to prevent errors in prescription of medication. The purposes of the study were to investigate the compliance of a sam ple of Portuguese medicine brand names with Portuguese pharmaceutical regulations. This includes identifying their basic linguistic characteristics and comparing these features and their frequency of occurrence with benchmark values of the colloquial or informal language. A sample of 474 brand names was selected. Names were analyzed using manual (visual analyses) and computer methods (FreP - Frequency Patterns of Phonological Objects in Portuguese and MS word). A significant number of names (61.3%) failed to comply with the Portuguese phonologic system (related to the sound of words) and/or the spelling system (related to the written form of words) contained more than one word, comprised a high proportion of infrequent syllable types or stress patterns and included abbreviations. The results suggest that some of the brand names of Portuguese medication should be reevaluated, and that regulation on this issue should be enforced and updated, taking into consideration specific linguistic and spelling codes.

  4. Consumer preferences for organic food: behavior building-up, importance of pricing, information and sensory issues

    OpenAIRE

    Avitia Rodríguez, Jessica Alejandra

    2012-01-01

    The aim of this thesis is to investigate Spanish consumers purchase motivations and behavior towards organic food by means of determining the key factors that take part on building their behavior. An important contribution of this work consists on providing more evidence on consumers’ underlying motivations to buy organic food for the particular case of Spain and to test the role of sensory “experience” in defining individual new WTP for a post purchasing situation. This thesis investigate...

  5. The importance of defining 'data' in data management policies: Commentary on: "Issues in data management".

    Science.gov (United States)

    Richardson, Julie; Hoffman-Kim, Diane

    2010-12-01

    What comprises 'data' varies from one institution to another based on the information which is deemed important by individual institutions. To effectively and efficiently produce, collect, and retain data, an organization develops specific defining characteristics of data to meet its informational needs. Procedures to maintain and retain knowledge among laboratory members and principal investigators will allow for improved efficiency of data collection. Optimization of communication, maintenance of inventories, record keeping, and updating relevant training programs are all critical to supporting the quality and integrity of a particular organization's data. Concurrent revisions to such procedures will ensure that the definition of data as well as the means by which it is collected and maintained remain appropriate to the needs of the individual organization.

  6. Readability: an important issue impacting healthcare for women with postpartum depression.

    Science.gov (United States)

    Logsdon, M Cynthia; Hutti, Marianne H

    2006-01-01

    To evaluate the reading level of depression-screening instruments commonly used in postpartum depression (PPD) and evaluate the reading level of prevalent consumer pamphlets and books on PPD. Descriptive study evaluating the reading level of four PPD instruments (the Edinburgh Postnatal Depression Scale, The Center for Epidemiologic Symptoms of Depression, the Postpartum Depression Screening Scale, and the Beck Depression Inventory-II), five pamphlets from grassroots organizations, and seven consumer books using the Fry Readability Graph. The readability of the postpartum screening instruments varied, but all were at or below the recommended 6th grade reading level. CES-D had the lowest reading level (grade 2). The readability of the consumer publications also varied, but all had a higher reading level than the recommended 6th grade level, some at the college reading level. Readability is an important consideration in the choice of depression-screening instruments and written materials for consumers. Nurses using any of the four postpartum screening instruments studied can feel confident that women who can read will be able to read them. The readability of a book, pamphlet, or instrument should be of concern to nurses who work with women during the postpartum period.

  7. Organizational culture, team climate, and quality management in an important patient safety issue: nosocomial pressure ulcers.

    Science.gov (United States)

    Bosch, Marije; Halfens, Ruud J G; van der Weijden, Trudy; Wensing, Michel; Akkermans, Reinier; Grol, Richard

    2011-03-01

    Increasingly, policy reform in health care is discussed in terms of changing organizational culture, creating practice teams, and organizational quality management. Yet, the evidence for these suggested determinants of high-quality care is inconsistent. To determine if the type of organizational culture (Competing Values Framework), team climate (Team Climate Inventory), and preventive pressure ulcer quality management at ward level were related to the prevalence of pressure ulcers. Also, we wanted to determine if the type of organizational culture, team climate, or the institutional quality management related to preventive quality management at the ward level. In this cross-sectional observational study multivariate (logistic) regression analyses were performed, adjusting for potential confounders and institution-level clustering. Data from 1274 patients and 460 health care professionals in 37 general hospital wards and 67 nursing home wards in the Netherlands were analyzed. The main outcome measures were nosocomial pressure ulcers in patients at risk for pressure ulcers (Braden score ≤ 18) and preventive quality management at ward level. No associations were found between organizational culture, team climate, or preventive quality management at the ward level and the prevalence of nosocomial pressure ulcers. Institutional quality management was positively correlated with preventive quality management at ward level (adj. β 0.32; p organizational culture, team climate, or preventive quality management at the ward level. These results would therefore not subscribe the widely suggested importance of these factors in improving health care. However, different designs and research methods (that go beyond the cross-sectional design) may be more informative in studying relations between such complex factors and outcomes in a more meaningful way. Copyright ©2010 Sigma Theta Tau International.

  8. The Importance of Environment for the Tourism Sector Of Trnc Within The Context of Environmental Issues of the Mediterranean Region

    OpenAIRE

    Okan SAFAKLI

    2001-01-01

    The basic aim of this study is to emphasize the importance and necessity of the environment for the tourism sector of the Turkish Republic of Northern Cyprus (TRNC) within the context of environmental. issues of the Mediterranean region. There are many types of tourism such as sea tourism (sea-sand-sun), ‘congress tourism‘, ‘health tourism‘, ‘yacht tourism‘, ‘cave tourism‘, ‘mountain tourism‘, ‘farm touris’, ‘hunting touris’, ‘golf touris’, ‘caravan touris’, ‘religion tourism’ and ‘history to...

  9. The Importance of Environment for the Tourism Sector Of Trnc Within The Context of Environmental Issues of the Mediterranean Region

    OpenAIRE

    2001-01-01

    The basic aim of this study is to emphasize the importance and necessity of the environment for the tourism sector of the Turkish Republic of Northern Cyprus (TRNC) within the context of environmental. issues of the Mediterranean region. There are many types of tourism such as sea tourism (sea-sand-sun), ‘congress tourism‘, ‘health tourism‘, ‘yacht tourism‘, ‘cave tourism‘, ‘mountain tourism‘, ‘farm touris’, ‘hunting touris’, ‘golf touris’, ‘caravan touris’, ‘religion tourism’ and ‘history to...

  10. On the use of ocean-atmosphere-wave models during an extreme CAO event: the importance of being coupled

    Science.gov (United States)

    Carniel, Sandro; Barbariol, Francesco; Benetazzo, Alvise; Bonaldo, Davide; Falcieri, Francesco M.; Miglietta, Mario M.; Ricchi, Antonio; Sclavo, Mauro

    2015-04-01

    During winter 2012 an extreme meteorological event stroke the whole Europe and particularly its central-southern sector. A strong and persistent spit of cold air coming from Siberian region (a Cold Air Outbreak, CAO) insisted on northern Italy and the Adriatic sea basin, leading to decreases in the sea temperatures up to 6 °C in less than two weeks, ice formation on the Venice lagoon and an exceptional snow fall in the Apennine region. In the sea the CAO was associated to a significant episode of dense water formation (DWF), a crucial phenomenon that heavily impacts the whole Adriatic Sea (from the sinking of water masses and associated ventilation of the northernmost shelf, to the flow along the western coast, until the flushing of southern Adriatic open slope and submarine canyons, with associated sediment transport and bottom reshaping). The extent of the DWF event in the Northern Adriatic sub-basin was estimated by means of coastal observatories, ad hoc measurements and, until now, results from existing one-way coupled atmosphere-ocean models. These are characterized by no SST feedback from the ocean to the atmosphere, and therefore by turbulent heat fluxes that may heavily reflect a non-consistent ocean state. The study proposes an investigation of the 2012 CAO using a fully coupled, three components, ocean-atmosphere-wave system (COAWST). Results highlight that, although the energy interplays between air and sea do not seem to significantly impact the wind forecasts, when providing heat fluxes that are consistent with the ocean temperature we find modified heat fluxes and air sea temperatures figures. Moreover, the consistent description of thermal exchanges adopted in the fully coupled model can affect the basin circulation, the quantification of dense water produced mass, and the description of its migration pathways and rates of off-shelf descent.

  11. Wire-bottom versus solid-bottom rodent caging issues important to scientists and laboratory animal science specialists.

    Science.gov (United States)

    Stark, D M

    2001-11-01

    Recent emphasis in the National Research Council's Guide for the Care and Use of Laboratory Animals and by the Association for Assessment and Accreditation of Laboratory Animal Care, International, related to the availability of bedding in rodent cages raises regulatory and accreditation issues in the toxicology-laboratory setting. This article reviews the results of a recent survey of 12 United States-based pharmaceutical and contract toxicology laboratories. The perceived benefits and issues related to the use of wire-bottom and bedded caging for rodent studies are presented. The 1999 survey showed that more than 80% of the rodents in surveyed toxicology facilities were housed in wire-bottom cages. Long-term budget expenses related to supplies and waste disposal are assessed. Considerable short-term and long-term costs to programs would be associated with a change from wire-bottom to solid-bottom caging. A review of the past and recent literature related to animal preferences and cage-associated animal lesions is included. The importance of IACUC review of caging chosen by the investigative staff is emphasized.

  12. [Importance of revision- and tumor-endoprosthetics in the treatment of periprosthetic fractures of the lower extremity].

    Science.gov (United States)

    Prodinger, P M; Harrasser, N; Suren, C; Pohlig, F; Mühlhofer, H; Schauwecker, J; von Eisenhart-Rothe, R

    2016-04-01

    Periprosthetic fractures of hip and knee prostheses are gaining clinical significance due to the increasing numbers of of primary arthroplasties. Additionally, these fractures are often associated with poor bone quality or present in patients after multiple revision procedures and concomitant excessive bone defects precluding those patients to be adequately treated by conventional osteosynthesis. Revision implants provide a wide range of options for the treatment of these fractures in order to achieve good clinical results. In the acetabular region cavitary defects associated with periprosthetic fractures can be treated by the use of megacups. Extensive segmental defects and pelvic discontinuity necessitate the use of cups with additional iliac support or even customized implants. Proximal femoral fractures can usually be fixed with modular stems and diaphyseal anchorage. Periprosthetic knee joint fractures can be treated with revision implants with modular sleeves or augment-combinations allowing sufficient bridging of bony defects. Functional reconstruction or refixation of the extensor mechanism is of crucial importance.

  13. Mothers' problem-solving skill and use of help with infant-related issues: the role of importance and need for action.

    Science.gov (United States)

    Pridham, K F; Chang, A S; Hansen, M F

    1987-08-01

    Examination was made of the relationship of mothers' appraisal of the importance of and need for action around infant-related issues to maternal experience (parity and time since birth), use of help, and perceived problem-solving competence. Sixty-two mothers (38 primiparae and 24 multiparae) kept for 90 days post-birth a daily log of issues, rated for importance and for need for action, and of help used. Mothers also reported perceived problem-solving competence on an 11-item scale. Findings indicated tentativeness in ratings of importance and action. Ratings of importance were associated with action ratings, except for temperament issues. Action ratings for baby care and illness issues decreased significantly with time. Otherwise, maternal experience had no effect on ratings. More of the variance in perceived competence than use of help was explained by action and importance ratings.

  14. How extreme are extremes?

    Science.gov (United States)

    Cucchi, Marco; Petitta, Marcello; Calmanti, Sandro

    2016-04-01

    High temperatures have an impact on the energy balance of any living organism and on the operational capabilities of critical infrastructures. Heat-wave indicators have been mainly developed with the aim of capturing the potential impacts on specific sectors (agriculture, health, wildfires, transport, power generation and distribution). However, the ability to capture the occurrence of extreme temperature events is an essential property of a multi-hazard extreme climate indicator. Aim of this study is to develop a standardized heat-wave indicator, that can be combined with other indices in order to describe multiple hazards in a single indicator. The proposed approach can be used in order to have a quantified indicator of the strenght of a certain extreme. As a matter of fact, extremes are usually distributed in exponential or exponential-exponential functions and it is difficult to quickly asses how strong was an extreme events considering only its magnitude. The proposed approach simplify the quantitative and qualitative communication of extreme magnitude

  15. Assessing the importance of spatio-temporal RCM resolution when estimating sub-daily extreme precipitation under current and future climate conditions

    DEFF Research Database (Denmark)

    Sunyer Pinya, Maria Antonia; Luchner, J.; Onof, C.

    2017-01-01

    The increase in extreme precipitation is likely to be one of the most significant impacts of climate change in cities due to increased pluvial flood risk. Hence, reliable information on changes in sub-daily extreme precipitation is needed for robust adaptation strategies. This study explores...

  16. 78 FR 13304 - Notice of Decision To Issue Permits for the Importation of Strawberry Fruit From Egypt Into the...

    Science.gov (United States)

    2013-02-27

    ... Strawberry Fruit From Egypt Into the Continental United States AGENCY: Animal and Plant Health Inspection... permits for the importation into the continental United States of fresh strawberry fruit from Egypt. Based... weeds via the importation of fresh strawberry fruit from Egypt. DATES: Effective Date: February 27,...

  17. 75 FR 71415 - Notice of Decision To Issue Permits for the Importation of Wall Rocket Leaves From the United...

    Science.gov (United States)

    2010-11-23

    ... the United Kingdom. Based on the findings of a pest risk analysis, which we made available to the..., based on the findings of a pest risk analysis (PRA), can be safely imported subject to one or more of... plant pests or noxious weeds via the importation of wall rocket leaves from the United Kingdom....

  18. The Importance of Moral Construal: Moral versus Non-Moral Construal Elicits Faster, More Extreme, Universal Evaluations of the Same Actions

    Science.gov (United States)

    Van Bavel, Jay J.; Packer, Dominic J.; Haas, Ingrid Johnsen; Cunningham, William A.

    2012-01-01

    Over the past decade, intuitionist models of morality have challenged the view that moral reasoning is the sole or even primary means by which moral judgments are made. Rather, intuitionist models posit that certain situations automatically elicit moral intuitions, which guide moral judgments. We present three experiments showing that evaluations are also susceptible to the influence of moral versus non-moral construal. We had participants make moral evaluations (rating whether actions were morally good or bad) or non-moral evaluations (rating whether actions were pragmatically or hedonically good or bad) of a wide variety of actions. As predicted, moral evaluations were faster, more extreme, and more strongly associated with universal prescriptions—the belief that absolutely nobody or everybody should engage in an action—than non-moral (pragmatic or hedonic) evaluations of the same actions. Further, we show that people are capable of flexibly shifting from moral to non-moral evaluations on a trial-by-trial basis. Taken together, these experiments provide evidence that moral versus non-moral construal has an important influence on evaluation and suggests that effects of construal are highly flexible. We discuss the implications of these experiments for models of moral judgment and decision-making. PMID:23209557

  19. Fuels planning: science synthesis and integration; social issues fact sheet 06: Important considerations for communicating about hazards

    Science.gov (United States)

    Rocky Mountain Research Station USDA Forest Service

    2004-01-01

    Effective public education and communication campaigns about wildland fire and fuels management should have clear objectives, and use the right techniques to achieve these objectives. This fact sheet lists seven important considerations for planning or implementing a hazard communication effort.

  20. Importância dos minerais na alimentação do pré-termo extremo Minerals in the nutrition of extremely low birth weight infants

    Directory of Open Access Journals (Sweden)

    Cleide E. P. Trindade

    2005-03-01

    Full Text Available OBJETIVO: Revisão crítica da literatura sobre os minerais cálcio, fósforo e microelementos na nutrição do pré-termo extremo, considerando a importância no crescimento, mineralização óssea e como componente de dietas. FONTES DOS DADOS: Utilizamos o banco de dados MEDLINE e o Cochrane Database of Systematic Reviews, de 1994 a 2004. Selecionamos artigos com enfoques originais, artigos de revisão e livros específicos. SÍNTESE DOS DADOS: As dificuldades na nutrição de prematuros extremos aumentam a freqüência de prematuros com restrição de crescimento, cujas conseqüências futuras estão para serem determinadas. Todavia, há pouca literatura sobre minerais, especialmente sobre micronutrientes na nutrição do pré-termo extremo, considerando-se o deficiente armazenamento e a importância destes em nutrição. O principal enfoque desta revisão foi sobre o cálcio e o fósforo na mineralização óssea e na suplementação em nutrição parenteral e enteral, bem como a avaliação crítica da nutrição pós-alta sobre a mineralização óssea. São abordadas as necessidades de micronutrientes, principalmente selênio e zinco, e a função antioxidante do selênio na provável prevenção de doenças do prematuro com atuação de radicais livres. CONCLUSÃO: Considerando os baixos estoques de minerais em prematuros extremos, há necessidade de mais pesquisas sobre minerais na nutrição destes prematuros para definir suas reais necessidades, os aspectos metabólicos, bem como aplicar os conhecimentos na formulação de dietas que permitam prevenir quadros de deficiência e conseqüências a longo prazo. Ainda há controvérsias sobre a influência de fórmulas pós-alta sobre a evolução da doença óssea da prematuridade.OBJECTIVE: To review the literature on the role of calcium, phosphorus and trace elements in the nutrition of extremely low birth weight infants, considering their importance for metabolism, bone mineralization

  1. 75 FR 26707 - Notice of Decision to Issue Permits for the Importation of Fresh Pomegranates and Baby Kiwi from...

    Science.gov (United States)

    2010-05-12

    ..., trade associations, a fumigation service, a State agriculture department, a foreign Government agency, a foreign trade association, and several produce importers, exporters, and wholesalers. Most of the... and Baby Kiwi from Chile into the United States AGENCY: Animal and Plant Health Inspection Service...

  2. 75 FR 56981 - Notice of Decision To Issue Permits for the Importation of Sweet Limes From Mexico Into the...

    Science.gov (United States)

    2010-09-17

    ... findings of a pest risk analysis, which we made available to the public for review and comment through a... pest risk analysis that evaluates the risks associated with the importation of a particular fruit or... analysis if: (1) No comments were received on the pest risk analysis; (2) the comments on the pest...

  3. 76 FR 8997 - Notice of Decision To Issue Permits for the Importation of Fresh Strawberries From Jordan Into...

    Science.gov (United States)

    2011-02-16

    .... Based on the findings of a pest risk analysis, which we made available to the public for review and... approving the importation of commodities that, based on the findings of a pest risk analysis (PRA), can be... measures will be sufficient to mitigate the risks of introducing or disseminating plant pests or...

  4. Determining issues of importance for the evaluation of quality of life and patient-reported outcomes in breast cancer: results of a survey of 1072 patients.

    Science.gov (United States)

    Hollen, Patricia J; Msaouel, Pavlos; Gralla, Richard J

    2015-06-01

    Identifying key issues for patients is central to assessing treatment for cancer, especially when evaluating health-related quality of life (QL) and patient-reported outcomes (PROs). This study was conducted to provide enhanced content validity support by incorporating the views of a large number of patients with breast cancer. This methodological study used an anonymous, cross-sectional, electronic web-based survey of 1072 patients with a diagnosis of breast cancer. Patients ranked the importance of 21 issues on a 5-point scale. Issues included general, physical, functional, psychosocial, and summative items. Analysis was also performed by four key factors (age group, time since diagnosis, adjuvant treatment or not, and tumor extent). All of the top five issues rated as either "very important" or "important" were global issues-rather than symptoms-such as maintaining quality of life (ranked in these two highest categories by 99 % of patients), maintaining independence (97 %), and ability to perform normal activities (97 %). The abilities to concentrate and to be able to sleep (97 and 96 %, respectively) were ranked above specific breast cancer symptoms. Specific symptoms included within the top ten highest ranked items were fatigue, depression, anxiety, shortness of breath, and pain. This is the largest analysis of evidence-based data determining support for content validity for QL and PROs provided by patients with breast cancer. While symptoms are important to patients, the survey also demonstrates that PRO measures that only evaluate symptoms are not fully responding to patient-expressed needs. These results provide confidence in the content of quality of life measures for large groups of patients with breast cancer, including the new Breast Cancer Symptom Scale (BCSS) questionnaire.

  5. Pivotal importance of STAT3 in protecting the heart from acute and chronic stress: new advancement and unresolved issues

    Directory of Open Access Journals (Sweden)

    Foaud A. Zouein

    2015-11-01

    Full Text Available The transcription factor Signal Transducer and Activator of Transcription 3 (STAT3 has been implicated in protecting the heart from acute ischemic injury under both basal conditions and as a crucial component of pre- and post-conditioning protocols. A number of anti-oxidant and antiapoptotic genes are upregulated by STAT3 via canonical means involving phosphorylation on Y705 and S727, although other incompletely defined posttranslational modifications are involved. In addition, STAT3 is now known to be present in cardiac mitochondria and to exert actions that regulate the electron transport chain, reactive oxygen species (ROS production, and mitochondrial permeability transition pore (mPTP opening. These non-canonical actions of STAT3 are enhanced by S727 phosphorylation. The molecular basis for the mitochondrial actions of STAT3 are poorly understood, but STAT3 is known to interact with a critical subunit of complex I and to regulate complex I function. Dysfunctional complex I has been implicated in ischemic injury, heart failure, and the aging process. Evidence also indicates that STAT3 is protective to the heart under chronic stress conditions, including hypertension, pregnancy, and advanced age. Paradoxically, the accumulation of unphosphorylated STAT3 (U-STAT3 in the nucleus has been suggested to drive pathological cardiac hypertrophy and inflammation via noncanonical gene expression, perhaps involving a distinct acetylation profile. U-STAT3 may also regulate chromatin stability. Our understanding of how the noncanonical genomic and mitochondrial actions of STAT3 in the heart are regulated and coordinated with the canonical actions of STAT3 is rudimentary. Here we present an overview of what is currently known about the pleotropic actions of STAT3 in the heart in order to highlight controversies and unresolved issues.

  6. Variation in Anatomical Position of Vermiform Appendix among Iranian Population: An Old Issue Which Has Not Lost Its Importance

    Directory of Open Access Journals (Sweden)

    Ahmad Ghorbani

    2014-01-01

    Full Text Available Vermiform appendix has diverse anatomical positions, lengths, and conditions of mesoappendix. Knowing the exact anatomical position of vermiform appendix is important in view of surgeons for on-time diagnosis and management of acute appendicitis. The aim of present study is determination of these characteristics of vermiform appendix among Iranian population. The present study was conducted on 200 bodies, selected from the dead bodies that had been referred to local bureau of legal medicine, Zenjan province, Iran, for medicolegal autopsy since 21 Mar 2010 to 21 Mar 2011. According to the results, the anatomical positions of the appendix were pelvic, subcecal, retroileal, retrocecal, ectopic, and preileal in 55.8%, 19%, 12.5%, 7%, 4.2%, and 1.5% of the bodies, respectively. The mean length of vermiform appendix was 91.2 mm and 80.3 mm in men and women, respectively. Mesoappendix was complete in 79.5% of the bodies. No association was found between sex and anatomical position of vermiform appendix. Anterior anatomical position was the most common position for vermiform appendix. It is inconsistent with most related reports from western countries. It might be possible that some factors, such as race, geographical changes, and dietary habits, play roles in determining the position of vermiform appendix.

  7. ‘‘Cool’’ governance of a ‘‘hot’’ climate issue: public and private responsibilities for the protection of vulnerable citizens against extreme heat

    NARCIS (Netherlands)

    Mees, H.L.P.; Driessen, P.P.J.; Runhaar, H.A.C.

    2015-01-01

    In cities in temperate climate zones, the elderly, disabled and socially deprived are most vulnerable to extreme heat, as witnessed by increased mortality rates during heat waves in Europe and North America. Many cities, however, lag behind in the protection of vulnerable citizens against heat stres

  8. [Treatment of gunshot fractures of the lower extremity: Part 1: Incidence, importance, case numbers, pathophysiology, contamination, principles of emergency and first responder treatment].

    Science.gov (United States)

    Franke, A; Bieler, D; Wilms, A; Hentsch, S; Johann, M; Kollig, E

    2014-11-01

    Gunshot wounds are rare in Germany and are mostly the result of suicide attempts or improper handling of weapons. The resulting injuries involve extensive tissue damage and complications which are thus unique and require a differentiated approach. As trauma centers may be confronted with gunshot wounds at any time, treatment principles must be understood and regularly reevaluated. Due to Bundeswehr operations abroad and the treatment of patients from other crisis regions a total of 85 gunshot wounds in 64 patients were treated between 2005 and 2011. In the majority of cases the lower extremities were affected and we were able to carry out treatment to preserve the extremities. In this article we report on our experiences and the results of treatment of gunshot wounds to the lower extremities. This part of the article deals with the epidemiology and pathophysiology of gunshot wounds to the lower extremities. By means of an evaluation of microbiological findings in a subgroup of patients involved in a civil war (n=10), the problem of multidrug resistant pathogen contamination, colonization and infection is discussed. In addition to a description of initial and emergency treatment of gunshot wounds, measures required for further treatment and decontamination are presented. Finally, the results are discussed with reference to the literature in this field.

  9. Ascribing beliefs to ingroup and outgroup political candidates: neural correlates of perspective-taking, issue importance and days until the election.

    Science.gov (United States)

    Falk, Emily B; Spunt, Robert P; Lieberman, Matthew D

    2012-03-05

    We used the five weeks leading up to the 2008 presidential election as a backdrop to examine the ways that the brain processes attitudes and beliefs under different circumstances. We examined individual differences in personal issue importance and trait perspective-taking, as well as the temporal context in which attitude representation took place (i.e. number of days until the election). Finally, we examined the extent to which similar or dissimilar processes were recruited when considering the attitudes of political ingroup and outgroup candidates. Brain regions involved in social cognition and theory of mind, and to a lesser extent the limbic system, were modulated by these factors. Higher issue importance led to greater recruitment of neural regions involved in social cognition, across target perspectives. Higher trait perspective-taking was also associated with greater recruitment of several regions involved in social cognition, but differed depending on target perspective; greater activity was observed in prefrontal regions associated with social cognition when considering the perspective of one's own candidate compared with the opponent, and this effect was amplified closer to the election. Taken together, these results highlight ways in which ability and motivational relevance modulate socio-affective processing of the attitudes of others.

  10. Extreme Heat

    Science.gov (United States)

    ... Landslides & Debris Flow Nuclear Blast Nuclear Power Plants Power Outages Pandemic Radiological Dispersion Device Severe Weather Snowstorms & Extreme ... Landslides & Debris Flow Nuclear Blast Nuclear Power Plants Power Outages Pandemic Radiological Dispersion Device Severe Weather Snowstorms & Extreme ...

  11. Mandelbrot's Extremism

    NARCIS (Netherlands)

    Beirlant, J.; Schoutens, W.; Segers, J.J.J.

    2004-01-01

    In the sixties Mandelbrot already showed that extreme price swings are more likely than some of us think or incorporate in our models.A modern toolbox for analyzing such rare events can be found in the field of extreme value theory.At the core of extreme value theory lies the modelling of maxima

  12. 新药非临床研究与评价中应关注的问题%Important issues in nonclinical evaluation of new pharmaceuticals

    Institute of Scientific and Technical Information of China (English)

    王庆利

    2012-01-01

    近些年来,国家和业界对药物创新的整体认知水平不断提高,研发能力不断加强,新药非临床研究与评价中出现了一些新的值得关注的问题:首先在安全性研究与评价技术方面,中药、化药没有实质性差异,研究评价的基本思路和技术标准应统一,相应研究的技术指导原则应统一.其次,在非临床安全性研究的质量方面,一是支持药品注册的非临床安全性研究均应严格执行GLP,保障数据的真实性、完整性、可靠性以及可溯源性,提高药物研究质量和非临床安全性评价水平,二是应加强受试物分析,是非临床安全性研究与评价获取可靠结果的物质基础.此外,毒代与药代动力学研究、致癌性研究等也是值得关注的问题.%There are some emerging important issues in nonclinical evaluation of new pharmaceuticals in China. We recognized that nonclinical evaluation of traditional Chinese medicines and chemical medicines ( small molecule entities) should follow the same technical guidelines and all nonclinical studies for new drugs should comply with good laboratory practice. Other issues such as toxicokinetic study, pharmacokinetic study, and carcinoge-nicity study should be strengthened further.

  13. Are hourly precipitation extremes increasing faster than daily precipitation extremes?

    Science.gov (United States)

    Barbero, Renaud; Fowler, Hayley; Blenkinsop, Stephen; Lenderink, Geert

    2016-04-01

    Extreme precipitation events appear to be increasing with climate change in many regions of the world, including the United States. These extreme events have large societal impacts, as seen during the recent Texas-Oklahoma flooding in May 2015 which caused several billion in damages and left 47 deaths in its path. Better understanding of past changes in the characteristics of extreme rainfall events is thus critical for reliable projections of future changes. Although it has been documented in several studies that daily precipitation extremes are increasing across parts of the contiguous United States, very few studies have looked at hourly extremes. However, this is of primary importance as recent studies on the temperature scaling of extreme precipitation have shown that increases above the Clausius-Clapeyron (~ 7% °C-1) are possible for hourly precipitation. In this study, we used hourly precipitation data (HPD) from the National Climatic Data Center and extracted more than 1,000 stations across the US with more than 40 years of data spanning the period 1950-2010. As hourly measurements are often associated with a range of issues, the data underwent multiple quality control processes to exclude erroneous data. While no significant changes were found in annual maximum precipitation using both hourly and daily resolution datasets, significant increasing trends in terms of frequency of episodes exceeding present-day 95th percentiles of wet hourly/daily precipitation were observed across a significant portion of the US. The fraction of stations with significant increasing trends falls outside the confidence interval range during all seasons but the summer. While less than 12% of stations exhibit significant trends at the daily scale in the wintertime, more than 45% of stations, mostly clustered in central and Northern United States, show significant increasing trends at the hourly scale. This suggests that short-duration storms have increased faster than daily

  14. Extreme cosmos

    CERN Document Server

    Gaensler, Bryan

    2011-01-01

    The universe is all about extremes. Space has a temperature 270°C below freezing. Stars die in catastrophic supernova explosions a billion times brighter than the Sun. A black hole can generate 10 million trillion volts of electricity. And hypergiants are stars 2 billion kilometres across, larger than the orbit of Jupiter. Extreme Cosmos provides a stunning new view of the way the Universe works, seen through the lens of extremes: the fastest, hottest, heaviest, brightest, oldest, densest and even the loudest. This is an astronomy book that not only offers amazing facts and figures but also re

  15. The importance of working capital management for hospital profitability: evidence from bond-issuing, not-for-profit U.S. hospitals.

    Science.gov (United States)

    Rauscher, Simone; Wheeler, John R C

    2012-01-01

    Increased financial pressures on hospitals have elevated the importance of working capital management, that is, the management of current assets and current liabilities, for hospitals' profitability. Efficient working capital management allows hospitals to reduce their holdings of current assets, such as inventory and accounts receivable, which earn no interest income and require financing with short-term debt. The resulting cash inflows can be reinvested in interest-bearing financial instruments or used to reduce short-term borrowing, thus improving the profitability of the organization. This study examines the relationship between hospitals' profitability and their performance at managing two components of working capital: accounts receivable, measured in terms of hospitals' average collection periods, and accounts payable, measured in terms of hospitals' average payment periods. Panel data derived from audited financial statements for 1,397 bond-issuing, not-for-profit U.S. hospitals for 2000-2007 were analyzed using hospital-level fixed-effects regression analysis. The results show a negative relationship between hospitals' average collection period and profitability. That is, hospitals that collected on their patient revenue faster reported higher profit margins than did hospitals that have larger balances of accounts receivable outstanding. We also found a negative relationship between hospitals' average payment period and their profitability. Hospital managers did not appear to delay paying their vendors. Rather, the findings indicated that more profitable hospitals paid their suppliers faster, possibly to avoid high effective interest rates on outstanding accounts payable, whereas less profitable hospitals waited longer to pay their bills. The findings of this study suggest that working capital management indeed matters for hospitals' profitability. Efforts aimed at reducing large balances in both accounts receivable and accounts payable may frequently be

  16. Organization 2020 - an empirical study of the current and future importance of organizational issues for horticultural companies and their perceived competence in Germany

    OpenAIRE

    MEYERDING STEPHAN G.H.

    2016-01-01

    Structural change, the increasing concentration of industry, and environmental issues are changing the competitive landscape in German horticulture. As in other fields of corporate management the priorities of organizational design are constantly changing. The aim of the present study is to identify issues which will characterize organizational design in the future from the perspective of decision-makers in German horticultural companies, to identify overarching trends and to capture the curr...

  17. Creating "Invited" Spaces for Counter-Radicalization and Counter-Extremism Education

    Science.gov (United States)

    Arshad-Ayaz, Adeela; Naseem, M. Ayaz

    2017-01-01

    In this article we present an articulation of how "invited spaces" can foster inclusive and authentic participation and public discourse on issues related to extremism and radicalization. Conversations on these issues that are of crucial importance to the general public are usually held in closed spaces or in spaces that are set up by…

  18. Creating "Invited" Spaces for Counter-Radicalization and Counter-Extremism Education

    Science.gov (United States)

    Arshad-Ayaz, Adeela; Naseem, M. Ayaz

    2017-01-01

    In this article we present an articulation of how "invited spaces" can foster inclusive and authentic participation and public discourse on issues related to extremism and radicalization. Conversations on these issues that are of crucial importance to the general public are usually held in closed spaces or in spaces that are set up by…

  19. High levels of incorrect use of car seat belts and child restraints in Fife--an important and under-recognised road safety issue.

    Science.gov (United States)

    Campbell, H; Macdonald, S; Richardson, P

    1997-03-01

    To pilot data collection instruments and to make a preliminary estimate of the level of incorrect use of car seat belts and child restraints in Fife, Scotland. Cross sectional survey of cars containing adults and children at a number of public sites across Fife in 1995 to assess use of car occupant restraints. Trained road safety officers assessed whether seat restraints were appropriate for the age of the passengers and whether restraints were used correctly. These assessments were based on standards published by the Child Accident Prevention Trust. The survey gathered data from 596 occupants in 180 cars: 327 adults and 269 children. Ten per cent of drivers who were approached refused to participate. Car occupant restraint was assessed in 180 drivers, 151 front seat passengers, and 265 rear seat passengers. Three hundred and sixty one occupants wore seat belts, 68 were restrained by a seat belt and booster cushion, 63 in toddler seats, 25 in two way seats, and 18 in rear facing infant carriers. Ninety seven per cent of drivers, 95% of front seat passengers, and 77% of rear seat passengers were restrained. However, in 98 (52%) vehicles at least one passenger was restrained by a device that was used incorrectly. Seven per cent of adults and 28% of children were secured incorrectly. The commonest errors were loose seat belts and restraint devices not adequately secured to the seat. Rates of incorrect use were highest in child seat restraints, reaching 60% with two way seats and 44% with rear facing infant seats. The incorrect use of car occupant restraints is an under-recognised problem, both by health professionals, and the general public. Incorrect use has been shown to reduce the effectiveness of restraints, can itself result in injury, and is likely to be an important factor in child passenger injuries. The correct use of car seat restraints merits greater attention in strategies aiming to reduce road traffic casualties. Areas of intervention that could be

  20. Extreme Starbursts in the Local Universe

    CERN Document Server

    Delgado, R M Gonzalez; Perez, E; Alonso-Herrero, A; Tadhunter, C; Veilleux, S; Heckman, T; Overzier, R; Goncalves, T S; Alberdi, A; Torres, M A Perez; Pasquali, A; Monreal-Ibero, A; Diaz-Santos, T; Garcia-Burillo, S; Caballero, D Miralles; Di Matteo, P; Kewley, L; Almeida, C Ramos; Weiner, B; Rothberg, B; Tan, J C; Jogee, S; Fernandes, R Cid; Rodrigues, M; Delgado-Serrano, R; Spoon, H; Hopkins, P; Rupke, D; Bellocchi, E; Cortijo, C; Lopez, J Piqueras; Canalizo, G; Imanishi, M; Lazarova, M; Villar-Martin, M; Brotherton, M; Wild, V; Swinbank, M; Menendez-Delmestre, K; Hammer, F; Perez-Gonz?alez, P; Turner, J; Fischer, J; Sanchez, S F; Colina, L; Gardini, A

    2010-01-01

    The "Extreme starbursts in the local universe" workshop was held at the Insituto de Astrofisica de Andalucia in Granada, Spain on 21-25 June 2010. Bearing in mind the advent of a new generation of facilities such as JWST, Herschel, ALMA, eVLA and eMerlin, the aim of the workshop was to bring together observers and theorists to review the latest results. The purpose of the workshop was to address the following issues: what are the main modes of triggering extreme starbursts in the local Universe? How efficiently are stars formed in extreme starbursts? What are the star formation histories of local starburst galaxies? How well do the theoretical simulations model the observations? What can we learn about starbursts in the distant Universe through studies of their local counterparts? How important is the role of extreme starbursts in the hierarchical assembly of galaxies? How are extreme starbursts related to the triggering of AGN in the nuclei of galaxies? Overall, 41 talks and 4 posters with their correspondin...

  1. Reach Envelope of Human Extremities

    Institute of Scientific and Technical Information of China (English)

    YANG Jingzhou(杨景周); ZHANG Yunqing(张云清); CHEN Liping(陈立平); ABDEL-MALEK Karim

    2004-01-01

    Significant attention in recent years has been given to obtain a better understanding of human joint ranges, measurement, and functionality, especially in conjunction with commands issued by the central nervous system. While researchers have studied motor commands needed to drive a limb to follow a path trajectory, various computer algorithms have been reported that provide adequate analysis of limb modeling and motion. This paper uses a rigorous mathematical formulation to model human limbs, understand their reach envelope, delineate barriers therein where a trajectory becomes difficult to control, and help visualize these barriers. Workspaces of a typical forearm with 9 degrees of freedom, a typical finger modeled as a 4- degree-of-freedom system, and a lower extremity with 4 degrees of freedom are discussed. The results show that using the proposed formulation, joint limits play an important role in distinguishing the barriers.

  2. How extreme is extreme hourly precipitation?

    Science.gov (United States)

    Papalexiou, Simon Michael; Dialynas, Yannis G.; Pappas, Christoforos

    2016-04-01

    The importance of accurate representation of precipitation at fine time scales (e.g., hourly), directly associated with flash flood events, is crucial in hydrological design and prediction. The upper part of a probability distribution, known as the distribution tail, determines the behavior of extreme events. In general, and loosely speaking, tails can be categorized in two families: the subexponential and the hyperexponential family, with the first generating more intense and more frequent extremes compared to the latter. In past studies, the focus has been mainly on daily precipitation, with the Gamma distribution being the most popular model. Here, we investigate the behaviour of tails of hourly precipitation by comparing the upper part of empirical distributions of thousands of records with three general types of tails corresponding to the Pareto, Lognormal, and Weibull distributions. Specifically, we use thousands of hourly rainfall records from all over the USA. The analysis indicates that heavier-tailed distributions describe better the observed hourly rainfall extremes in comparison to lighter tails. Traditional representations of the marginal distribution of hourly rainfall may significantly deviate from observed behaviours of extremes, with direct implications on hydroclimatic variables modelling and engineering design.

  3. Extreme Rainfall Events Over Southern Africa: Assessment of a Climate Model to Reproduce Daily Extremes

    Science.gov (United States)

    Williams, C.; Kniveton, D.; Layberry, R.

    2007-12-01

    It is increasingly accepted that any possible climate change will not only have an influence on mean climate but may also significantly alter climatic variability. This issue is of particular importance for environmentally vulnerable regions such as southern Africa. The subcontinent is considered especially vulnerable extreme events, due to a number of factors including extensive poverty, disease and political instability. Rainfall variability and the identification of rainfall extremes is a function of scale, so high spatial and temporal resolution data are preferred to identify extreme events and accurately predict future variability. The majority of previous climate model verification studies have compared model output with observational data at monthly timescales. In this research, the assessment of a state-of-the-art climate model to simulate climate at daily timescales is carried out using satellite derived rainfall data from the Microwave Infra-Red Algorithm (MIRA). This dataset covers the period from 1993-2002 and the whole of southern Africa at a spatial resolution of 0.1 degree longitude/latitude. Once the model's ability to reproduce extremes has been assessed, idealised regions of SST anomalies are used to force the model, with the overall aim of investigating the ways in which SST anomalies influence rainfall extremes over southern Africa. In this paper, results from sensitivity testing of the UK Meteorological Office Hadley Centre's climate model's domain size are firstly presented. Then simulations of current climate from the model, operating in both regional and global mode, are compared to the MIRA dataset at daily timescales. Thirdly, the ability of the model to reproduce daily rainfall extremes will be assessed, again by a comparison with extremes from the MIRA dataset. Finally, the results from the idealised SST experiments are briefly presented, suggesting associations between rainfall extremes and both local and remote SST anomalies.

  4. Post-mortem histopathological investigations of the bone marrow in forensic medicine: an important issue for both the forensic and clinical pathologist.

    Science.gov (United States)

    Roll, P; Beham, A; Beham-Schmid, Ch

    2009-04-15

    In the forensic literature only a few scientific reports are dealing with series of histopathological bone marrow (BM) investigations, mainly concerning changes after drug abuse and alcoholic consumption. In a period of 13 years (1995-2008) we routinely investigated 225 BM specimens from anterior iliac crests taken at forensic autopsies if the cause of death was unclear or vague, septicaemia was suspected or known, in cases of presumed haemorrhagic diathesis or bleeding tendencies, spleens were found to be enlarged or intoxications were suspected or proofed. In 78 cases (34.66%) abnormal histopathologic changes were found. Forty of those revealed neoplastic, mainly haematological diseases, which were unknown during lifetime. Referring to our findings, extraction of post-mortem BM specimens for histopathological investigations should become an essential issue for both the forensic and clinical pathologist.

  5. Precipitation extremes under climate change

    CERN Document Server

    O'Gorman, Paul A

    2015-01-01

    The response of precipitation extremes to climate change is considered using results from theory, modeling, and observations, with a focus on the physical factors that control the response. Observations and simulations with climate models show that precipitation extremes intensify in response to a warming climate. However, the sensitivity of precipitation extremes to warming remains uncertain when convection is important, and it may be higher in the tropics than the extratropics. Several physical contributions govern the response of precipitation extremes. The thermodynamic contribution is robust and well understood, but theoretical understanding of the microphysical and dynamical contributions is still being developed. Orographic precipitation extremes and snowfall extremes respond differently from other precipitation extremes and require particular attention. Outstanding research challenges include the influence of mesoscale convective organization, the dependence on the duration considered, and the need to...

  6. THE IMPACT OF EXTREME RISK EVENTS ON THE ECONOMY

    Directory of Open Access Journals (Sweden)

    Ionela-Daniela GĂITAN

    2016-02-01

    Full Text Available In this paper I wanted to highlight the impact of extreme risk events on the economy. The issue that I will approach in this paper is one of great importance, taking into account that extreme risk events that occur are  different  and are becoming more frequent  and harder to  control.  The quickly  development  of  these eventsrequires the implementation of a suitable risk management system. The complexity of this issue involves different approaches that can be interrelated in: computer science, mathematics, risk management, crisis management, andmodeling and simulation of extreme risk events. Natural disasters are rare events, but when they occur are causing a huge damage and an adequate management is necessary to return to a state of normality in a short time. To achieve our goal, in the first part of the paper, we presented the problems that an extreme risk event causes in a country when they occur. In the last part of the paper I presented analytical, statistical and econometric methods used in analysis of the impact on the economy of extreme risk events. Natural  disasters,  which  are  extreme  risk  events,  rarely  produce,  but  when  they  occur  causing  hugedamage and an adequate management is necessary to return to a state of normality in a short time.

  7. Philosophical Issues of Black Holes

    CERN Document Server

    Romero, Gustavo E

    2014-01-01

    Black holes are extremely relativistic objects. Physical processes around them occur in a regime where the gravitational field is extremely intense. Under such conditions, our representations of space, time, gravity, and thermodynamics are pushed to their limits. In such a situation philosophical issues naturally arise. In this chapter I review some philosophical questions related to black holes. In particular, the relevance of black holes for the metaphysical dispute between presentists and eternalists, the origin of the second law of thermodynamics and its relation to black holes, the problem of information, black holes and hypercomputing, the nature of determinisim, and the breakdown of predictability in black hole space-times. I maintain that black hole physics can be used to illuminate some important problems in the border between science and philosophy, either epistemology and ontology.

  8. Extreme Photonics & Applications

    CERN Document Server

    Hall, Trevor J; Paredes, Sofia A

    2010-01-01

    "Extreme Photonics & Applications" arises from the 2008 NATO Advanced Study Institute in Laser Control & Monitoring in New Materials, Biomedicine, Environment, Security and Defense. Leading experts in the manipulation of light offered by recent advances in laser physics and nanoscience were invited to give lectures in their fields of expertise and participate in discussions on current research, applications and new directions. The sum of their contributions to this book is a primer for the state of scientific knowledge and the issues within the subject of photonics taken to the extreme frontiers: molding light at the ultra-finest scales, which represents the beginning of the end to limitations in optical science for the benefit of 21st Century technological societies. Laser light is an exquisite tool for physical and chemical research. Physicists have recently developed pulsed lasers with such short durations that one laser shot takes the time of one molecular vibration or one electron rotation in an ...

  9. Upper extremity amputations and prosthetics.

    Science.gov (United States)

    Ovadia, Steven A; Askari, Morad

    2015-02-01

    Upper extremity amputations are most frequently indicated by severe traumatic injuries. The location of the injury will determine the level of amputation. Preservation of extremity length is often a goal. The amputation site will have important implications on the functional status of the patient and options for prosthetic reconstruction. Advances in amputation techniques and prosthetic reconstructions promote improved quality of life. In this article, the authors review the principles of upper extremity amputation, including techniques, amputation sites, and prosthetic reconstructions.

  10. Statistics of Extremes

    KAUST Repository

    Davison, Anthony C.

    2015-04-10

    Statistics of extremes concerns inference for rare events. Often the events have never yet been observed, and their probabilities must therefore be estimated by extrapolation of tail models fitted to available data. Because data concerning the event of interest may be very limited, efficient methods of inference play an important role. This article reviews this domain, emphasizing current research topics. We first sketch the classical theory of extremes for maxima and threshold exceedances of stationary series. We then review multivariate theory, distinguishing asymptotic independence and dependence models, followed by a description of models for spatial and spatiotemporal extreme events. Finally, we discuss inference and describe two applications. Animations illustrate some of the main ideas. © 2015 by Annual Reviews. All rights reserved.

  11. Detection and attribution of extreme weather disasters

    Science.gov (United States)

    Huggel, Christian; Stone, Dáithí; Hansen, Gerrit

    2014-05-01

    Single disasters related to extreme weather events have caused loss and damage on the order of up to tens of billions US dollars over the past years. Recent disasters fueled the debate about whether and to what extent these events are related to climate change. In international climate negotiations disaster loss and damage is now high on the agenda, and related policy mechanisms have been discussed or are being implemented. In view of funding allocation and effective risk reduction strategies detection and attribution to climate change of extreme weather events and disasters is a key issue. Different avenues have so far been taken to address detection and attribution in this context. Physical climate sciences have developed approaches, among others, where variables that are reasonably sampled over climatically relevant time periods and related to the meteorological characteristics of the extreme event are examined. Trends in these variables (e.g. air or sea surface temperatures) are compared between observations and climate simulations with and without anthropogenic forcing. Generally, progress has been made in recent years in attribution of changes in the chance of some single extreme weather events to anthropogenic climate change but there remain important challenges. A different line of research is primarily concerned with losses related to the extreme weather events over time, using disaster databases. A growing consensus is that the increase in asset values and in exposure are main drivers of the strong increase of economic losses over the past several decades, and only a limited number of studies have found trends consistent with expectations from climate change. Here we propose a better integration of existing lines of research in detection and attribution of extreme weather events and disasters by applying a risk framework. Risk is thereby defined as a function of the probability of occurrence of an extreme weather event, and the associated consequences

  12. Extremes in nature

    CERN Document Server

    Salvadori, Gianfausto; Kottegoda, Nathabandu T

    2007-01-01

    This book is about the theoretical and practical aspects of the statistics of Extreme Events in Nature. Most importantly, this is the first text in which Copulas are introduced and used in Geophysics. Several topics are fully original, and show how standard models and calculations can be improved by exploiting the opportunities offered by Copulas. In addition, new quantities useful for design and risk assessment are introduced.

  13. Dental Issues & Down Syndrome

    Science.gov (United States)

    ... Associated Conditions » Dental Issues & Down Syndrome Dental Issues & Down Syndrome Dental care is important for everybody, but people ... is Different About the Teeth of People With Down Syndrome? Delayed Eruption The teeth of people with Down ...

  14. Hydrological extremes and security

    Science.gov (United States)

    Kundzewicz, Z. W.; Matczak, P.

    2015-04-01

    Economic losses caused by hydrological extremes - floods and droughts - have been on the rise. Hydrological extremes jeopardize human security and impact on societal livelihood and welfare. Security can be generally understood as freedom from threat and the ability of societies to maintain their independent identity and their functional integrity against forces of change. Several dimensions of security are reviewed in the context of hydrological extremes. The traditional interpretation of security, focused on the state military capabilities, has been replaced by a wider understanding, including economic, societal and environmental aspects that get increasing attention. Floods and droughts pose a burden and serious challenges to the state that is responsible for sustaining economic development, and societal and environmental security. The latter can be regarded as the maintenance of ecosystem services, on which a society depends. An important part of it is water security, which can be defined as the availability of an adequate quantity and quality of water for health, livelihoods, ecosystems and production, coupled with an acceptable level of water-related risks to people, environments and economies. Security concerns arise because, over large areas, hydrological extremes - floods and droughts - are becoming more frequent and more severe. In terms of dealing with water-related risks, climate change can increase uncertainties, which makes the state's task to deliver security more difficult and more expensive. However, changes in population size and development, and level of protection, drive exposure to hydrological hazards.

  15. Statistical modeling and trend detection of extreme sea level records in the Pearl River Estuary

    Science.gov (United States)

    Wang, Weiwen; Zhou, Wen

    2017-03-01

    Sea level rise has become an important issue in global climate change studies. This study investigates trends in sea level records, particularly extreme records, in the Pearl River Estuary, using measurements from two tide gauge stations in Macau and Hong Kong. Extremes in the original sea level records (daily higher high water heights) and in tidal residuals with and without the 18.6-year nodal modulation are investigated separately. Thresholds for defining extreme sea levels are calibrated based on extreme value theory. Extreme events are then modeled by peaks-over-threshold models. The model applied to extremes in original sea level records does not include modeling of their durations, while a geometric distribution is added to model the duration of extremes in tidal residuals. Realistic modeling results are recommended in all stationary models. Parametric trends of extreme sea level records are then introduced to nonstationary models through a generalized linear model framework. The result shows that, in recent decades, since the 1960s, no significant trends can be found in any type of extreme at any station, which may be related to a reduction in the influence of tropical cyclones in the region. For the longer-term record since the 1920s at Macau, a regime shift of tidal amplitudes around the 1970s may partially explain the diverse trend of extremes in original sea level records and tidal residuals.

  16. Testing of Radiation Hardness in the Extreme-Ultraviolet Spectral Region

    Science.gov (United States)

    Arp, U.; Ermanoski, I.; Tarrio, C.; Grantham, S.; Hill, S.; Dhez, P.; Lucatorto, T. B.

    2007-01-01

    Currently we are commissioning a second multilayer-based beamline to study the radiation hardness of multilayers under extreme-ultraviolet (EUV) irradiation in an oxidizing atmosphere. Multilayer lifetime is one of the most important issues for the commercialization of extreme-ultraviolet lithography. The beamline employs a spherical multilayer mirror and a beryllium filter. The mirror demagnifies the source and reflects 13.4 nm radiation as well as visible light. The beryllium filter suppresses the visible light reflected by the mirror and provides also a barrier between the extremely clean storage ring vacuum and the water atmosphere of the test chamber.

  17. Role Playing, Issue Importance, and Attitude Change.

    Science.gov (United States)

    Sarup, Gian

    1981-01-01

    Contrasted three major theories on attitude change: cognitive dissonance, incentive, and social judgment. Results from student questionnaires provided little support for cognitive dissonance. Also provided credible, though overlapping, evidence for incentive and social judgment theories. Improvised role playing produced more change than did…

  18. Infectious disease and the extreme sport athlete.

    Science.gov (United States)

    Young, Craig C; Niedfeldt, Mark W; Gottschlich, Laura M; Peterson, Charles S; Gammons, Matthew R

    2007-07-01

    Extreme sport competition often takes place in locations that may harbor atypical diseases. This article discusses infections that may be more likely to occur in the extreme sport athlete, such as selected parasitic infections, marine infections, freshwater-borne diseases, tick-borne disease, and zoonoses. Epidemiology, presentation, treatment, complications, and return-to-sport issues are discussed for each of these diseases.

  19. Christian Extremism as a Domestic Terror Threat

    Science.gov (United States)

    2011-05-19

    extremism with cultural relativism to universally deem extremist actions as justified.8 Religious extremism and conflict are not new. Conceivably, as...health care program? The questions above reflect the ongoing ethical and legal debate on abortion, a social issue that remains controversial and heavily

  20. Modeling extreme risks in ecology.

    Science.gov (United States)

    Burgman, Mark; Franklin, James; Hayes, Keith R; Hosack, Geoffrey R; Peters, Gareth W; Sisson, Scott A

    2012-11-01

    Extreme risks in ecology are typified by circumstances in which data are sporadic or unavailable, understanding is poor, and decisions are urgently needed. Expert judgments are pervasive and disagreements among experts are commonplace. We outline approaches to evaluating extreme risks in ecology that rely on stochastic simulation, with a particular focus on methods to evaluate the likelihood of extinction and quasi-extinction of threatened species, and the likelihood of establishment and spread of invasive pests. We evaluate the importance of assumptions in these assessments and the potential of some new approaches to account for these uncertainties, including hierarchical estimation procedures and generalized extreme value distributions. We conclude by examining the treatment of consequences in extreme risk analysis in ecology and how expert judgment may better be harnessed to evaluate extreme risks.

  1. [Prehospital care in extremity major vascular injuries].

    Science.gov (United States)

    Samokhvallov, I M; Reva, V A; Pronchenko, A A; Seleznev, A B

    2011-09-01

    The problem of temporary hemorrhage control is one of the most important issues of modern war surgery and surgery of trauma. It is a review of literature devoted to prehospital care in extremity major vascular injuries, embraced up-to-date domestic materials as well as the modern foreign papers in this area. The most important historical landmarks of temporary hemorrhage control system are considered. We paid special attention to the most usable methods and means of hemorrhage control which are utilized at the modern time: pressure bandages, tourniquets, local haemostatic agents. The comprehensive analysis of the contamporary haemostatic means concerning U.S. Army has done. The experience of foreign colleagues in development of prehospital care for the injured, creation and progress of new haemostatic methods, application of temporary hemorrhage control system is analyzed.

  2. Proposal of Enhanced Extreme Programming Model

    Directory of Open Access Journals (Sweden)

    M. Rizwan Jameel Qureshi

    2015-01-01

    Full Text Available Extreme programming is one of the commonly used agile methodologies in software development. It is very responsive to changing requirements even in the late phases of the project. However, quality activities in extreme programming phases are implemented sequentially along with the activities that work on the functional requirements. This reduces the agility to deliver increments continuously and makes an inverse relationship between quality and agility. Due to this relationship, extreme programming does not consume enough time on making extensive documentation and robust design. To overcome these issues, an enhanced extreme programming model is proposed. Enhanced extreme programming introduces parallelism in the activities' execution through putting quality activities into a separate execution line. In this way, the focus on delivering increments quickly is achieved without affecting the quality of the final output. In enhanced extreme programming, the quality concept is extended to include refinement of all phases of classical extreme programming and creating architectural design based on the refined design documents.

  3. Effects of extreme natural events on the provision of ecosystem services in a mountain environment: The importance of trail design in delivering system resilience and ecosystem service co-benefits.

    Science.gov (United States)

    Tomczyk, Aleksandra M; White, Piran C L; Ewertowski, Marek W

    2016-01-15

    A continued supply of ecosystem services (ES) from a system depends on the resilience of that system to withstand shocks and perturbations. In many parts of the world, climate change is leading to an increased frequency of extreme weather events, potentially influencing ES provision. Our study of the effects of an intense rainfall event in Gorce National Park, Poland, shows: (1) the intense rainfall event impacted heavily on the supply of ES by limiting potential recreation opportunities and reducing erosion prevention; (2) these negative impacts were not only restricted to the period of the extreme event but persisted for up to several years, depending on the pre-event trail conditions and post-event management activities; (3) to restore the pre-event supply of ES, economic investments were required in the form of active repairs to trails, which, in Gorce National Park, were an order of magnitude higher than the costs of normal trail maintenance; and (4) when recreational trails were left to natural restoration, loss of biodiversity was observed, and recovery rates of ES (recreation opportunities and soil erosion prevention) were reduced in comparison to their pre-event state. We conclude that proper trail design and construction provides a good solution to avoid some of the negative impacts of extreme events on recreation, as well as offering co-benefits in terms of protecting biodiversity and enhancing the supply of regulating services such as erosion prevention.

  4. Extremely Preterm Birth

    Science.gov (United States)

    ... Events Advocacy For Patients About ACOG Extremely Preterm Birth Home For Patients Search FAQs Extremely Preterm Birth ... Spanish FAQ173, June 2016 PDF Format Extremely Preterm Birth Pregnancy When is a baby considered “preterm” or “ ...

  5. Promoting Exit from Violent Extremism

    DEFF Research Database (Denmark)

    Dalgaard-Nielsen, Anja

    2013-01-01

    A number of Western countries are currently adding exit programs targeting militant Islamists to their counterterrorism efforts. Drawing on research into voluntary exit from violent extremism, this article identifies themes and issues that seem to cause doubt, leading to exit. It then provides...... the influence attempt as subtle as possible, use narratives and self-affirmatory strategies to reduce resistance to persuasion, and consider the possibility to promote attitudinal change via behavioral change as an alternative to seek to influence beliefs directly....

  6. Spatial dependence of extreme rainfall

    Science.gov (United States)

    Radi, Noor Fadhilah Ahmad; Zakaria, Roslinazairimah; Satari, Siti Zanariah; Azman, Muhammad Az-zuhri

    2017-05-01

    This study aims to model the spatial extreme daily rainfall process using the max-stable model. The max-stable model is used to capture the dependence structure of spatial properties of extreme rainfall. Three models from max-stable are considered namely Smith, Schlather and Brown-Resnick models. The methods are applied on 12 selected rainfall stations in Kelantan, Malaysia. Most of the extreme rainfall data occur during wet season from October to December of 1971 to 2012. This period is chosen to assure the available data is enough to satisfy the assumption of stationarity. The dependence parameters including the range and smoothness, are estimated using composite likelihood approach. Then, the bootstrap approach is applied to generate synthetic extreme rainfall data for all models using the estimated dependence parameters. The goodness of fit between the observed extreme rainfall and the synthetic data is assessed using the composite likelihood information criterion (CLIC). Results show that Schlather model is the best followed by Brown-Resnick and Smith models based on the smallest CLIC's value. Thus, the max-stable model is suitable to be used to model extreme rainfall in Kelantan. The study on spatial dependence in extreme rainfall modelling is important to reduce the uncertainties of the point estimates for the tail index. If the spatial dependency is estimated individually, the uncertainties will be large. Furthermore, in the case of joint return level is of interest, taking into accounts the spatial dependence properties will improve the estimation process.

  7. Multidimensional extremal dependence coefficients

    OpenAIRE

    2017-01-01

    Extreme values modeling has attracting the attention of researchers in diverse areas such as the environment, engineering, or finance. Multivariate extreme value distributions are particularly suitable to model the tails of multidimensional phenomena. The analysis of the dependence among multivariate maxima is useful to evaluate risk. Here we present new multivariate extreme value models, as well as, coefficients to assess multivariate extremal dependence.

  8. The European Extreme Right and Religious Extremism

    Directory of Open Access Journals (Sweden)

    Jean-Yves Camus

    2007-12-01

    Full Text Available The ideology of the Extreme Right in Western Europe is rooted in Catholic fundamentalism and Counter-Revolutionary ideas. However, the Extreme Right, like all other political families, has had to adjust to an increasingly secular society. The old link between religion and the Extreme Right has thus been broken and in fact already was when Fascism overtook Europe: Fascism was secular, sometimes even anti-religious, in its essence. Although Catholic fundamentalists still retain strong positions within the apparatus of several Extreme Right parties (Front National, the vote for the Extreme Right is generally weak among regular churchgoers and strong among non-believers. In several countries, the vote for the Extreme Right is stronger among Protestant voters than among Catholics, since while Catholics may support Christian-Democratic parties, there are very few political parties linked to Protestant churches. Presently, it also seems that Paganism is becoming the dominant religious creed within the Extreme Right. In a multicultural Europe, non-Christian forms of religious fundamentalism such as Islamism also exist with ideological similarities to the Extreme Right, but this is not sufficient to categorize Islamism as a form of Fascism. Some Islamist groups seek alliances with the Extreme Right on the basis of their common dislike for Israel and the West, globalization and individual freedom of thought.

  9. Statistical Model of Extreme Shear

    DEFF Research Database (Denmark)

    Larsen, Gunner Chr.; Hansen, Kurt Schaldemose

    2004-01-01

    In order to continue cost-optimisation of modern large wind turbines, it is important to continously increase the knowledge on wind field parameters relevant to design loads. This paper presents a general statistical model that offers site-specific prediction of the probability density function...... by a model that, on a statistically consistent basis, describe the most likely spatial shape of an extreme wind shear event. Predictions from the model have been compared with results from an extreme value data analysis, based on a large number of high-sampled full-scale time series measurements...... are consistent, given the inevitabel uncertainties associated with model as well as with the extreme value data analysis. Keywords: Statistical model, extreme wind conditions, statistical analysis, turbulence, wind loading, statistical analysis, turbulence, wind loading, wind shear, wind turbines....

  10. Extreme Programming in a Research Environment

    Science.gov (United States)

    Wood, William A.; Kleb, William L.

    2002-01-01

    This article explores the applicability of Extreme Programming in a scientific research context. The cultural environment at a government research center differs from the customer-centric business view. The chief theoretical difficulty lies in defining the customer to developer relationship. Specifically, can Extreme Programming be utilized when the developer and customer are the same person? Eight of Extreme Programming's 12 practices are perceived to be incompatible with the existing research culture. Further, six of the nine 'environments that I know don't do well with XP' apply. A pilot project explores the use of Extreme Programming in scientific research. The applicability issues are addressed and it is concluded that Extreme Programming can function successfully in situations for which it appears to be ill-suited. A strong discipline for mentally separating the customer and developer roles is found to be key for applying Extreme Programming in a field that lacks a clear distinction between the customer and the developer.

  11. Privacy issues in mobile advertising

    DEFF Research Database (Denmark)

    Cleff, Evelyne Beatrix

    The emergence of the wired Internet and mobile telecommunication networks is creating new opportunities for advertisers to generate new revenue streams through mobile users. As consumer adoption of mobile technology continues to increase, it is only a question of time when mobile advertising...... becomes an important part of marketing strategies. The development of mobile advertising, however, will be dependent on acceptance and usability issues in order to ensure permission-based advertising. Growing concerns about the protection of the users' privacy have been raised since mobile advertising may...... become extremely intrusive practices in an intimate personal space. This article focuses on the evaluation of legal problems raised by this novel form of advertising. It is assumed that a technological design, which is in line with the legal framework, will ensure that the benefits of mobile advertising...

  12. Privacy issues in mobile advertising

    DEFF Research Database (Denmark)

    Cleff, Evelyne Beatrix

    2007-01-01

    The emergence of the wired Internet and mobile telecommunication networks is creating new opportunities for advertisers to generate new revenue streams through mobile users. As consumer adoption of mobile technology continues to increase, it is only a question of time when mobile advertising...... becomes an important part of marketing strategies. The development of mobile advertising, however, will be dependent on acceptance and usability issues in order to ensure permission-based advertising. Growing concerns about the protection of the users' privacy have been raised since mobile advertising may...... become extremely intrusive practices in an intimate personal space. This article focuses on the evaluation of legal problems raised by this novel form of advertising. It is assumed that a technological design, which is in line with the legal framework, will ensure that the benefits of mobile advertising...

  13. Privacy issues in mobile advertising

    DEFF Research Database (Denmark)

    Cleff, Evelyne Beatrix

    2007-01-01

    The emergence of the wired Internet and mobile telecommunication networks is creating new opportunities for advertisers to generate new revenue streams through mobile users. As consumer adoption of mobile technology continues to increase, it is only a question of time when mobile advertising...... become extremely intrusive practices in an intimate personal space. This article focuses on the evaluation of legal problems raised by this novel form of advertising. It is assumed that a technological design, which is in line with the legal framework, will ensure that the benefits of mobile advertising...... becomes an important part of marketing strategies. The development of mobile advertising, however, will be dependent on acceptance and usability issues in order to ensure permission-based advertising. Growing concerns about the protection of the users' privacy have been raised since mobile advertising may...

  14. Privacy issues in mobile advertising

    DEFF Research Database (Denmark)

    Cleff, Evelyne Beatrix

    The emergence of the wired Internet and mobile telecommunication networks is creating new opportunities for advertisers to generate new revenue streams through mobile users. As consumer adoption of mobile technology continues to increase, it is only a question of time when mobile advertising...... become extremely intrusive practices in an intimate personal space. This article focuses on the evaluation of legal problems raised by this novel form of advertising. It is assumed that a technological design, which is in line with the legal framework, will ensure that the benefits of mobile advertising...... becomes an important part of marketing strategies. The development of mobile advertising, however, will be dependent on acceptance and usability issues in order to ensure permission-based advertising. Growing concerns about the protection of the users' privacy have been raised since mobile advertising may...

  15. The importance of interpersonal communication in poison centers.

    Science.gov (United States)

    Crouch, B I; Thomas, K C; Rothwell, E; Planalp, S; Ellington, L; Teemant, K

    2013-11-01

    Poison control center (PCC) personnel face many challenges in communicating with callers and with each other. The purpose of this study was to identify interpersonal communication issues that affect the work environment within PCCs. As part of a larger questionnaire study distributed electronically to members of the American Association of Poison Control Centers (AAPCC) to assess communication training needs for PCCs, three questions were included to assess interpersonal communication within the work environment: (1) How important is interpersonal communication within your center to a positive work environment? (not at all to extremely important, 1-7); (2) How disruptive is interpersonal communication to your work? (not at all to extremely disruptive, 1-7); and (3) What communication issues do you find most disruptive to your work? (free-text response). Descriptive and qualitative content analyses were used to identify themes in responses. A total of 537 responses were received from SPIs, directors, medical directors, and other PCC staff. Interpersonal communication within the PCC was rated as extremely important to a positive work environment (median = 7 and IQR = 6-7; 62.3% rated as extremely important). Interpersonal communication was rated as less than moderately disruptive on average (median = 3 and IQR = 2-4). Free-text responses were received from 335 (62%) respondents. Free-text comments were broadly categorized as relating to PCC personnel and work environment and issues related to PCC callers. Categories that emerged from the PCC personnel and work environment category included the following: poor interpersonal communication (n = 104; 31%); background noise (n = 96; 29%); poor work procedures (n = 51; 15%); and poor management communication (n = 38; 11%). Interpersonal communication within PCCs was considered to be important for a positive work environment. Although not found to be strongly disruptive by most respondents, several specific interpersonal

  16. Communicating adaptation with emotions: the role of intense experiences in raising concern about extreme weather.

    Directory of Open Access Journals (Sweden)

    Eleftheria Vasileiadou

    2014-06-01

    Full Text Available Adaptation to extreme weather is often considered as having a low urgency and being a low priority governance option, even though the intensity of extreme weather events is expected to increase as a result of climate change. An important issue is how to raise an adequate level of concern among individuals, policy makers, and broader decision makers in companies and organizations so that adaptation to extreme events becomes mainstream practice. We conducted 40 indepth interviews with individuals from different sectors in The Netherlands to identify the different types of experiences with extreme events, as well as the relationship between such experiences and the level of concern about extreme weather. Our results indicate that individuals who have experienced an intense, life-threatening event have a significantly higher level of concern than those without such an experience. Professional experience and secondhand experience through participating in information events do not significantly affect the level of concern about extreme events. This suggests limited intervention possibilities for communication of adaptation, as well as for raising support for adaptation measures. Framing adaptation measures in relation to personal circumstances and emotions during extreme events could help raise concern about extreme weather events, as well as societal support for adaptation measures.

  17. Irrigation mitigates against heat extremes

    Science.gov (United States)

    Thiery, Wim; Fischer, Erich; Visser, Auke; Hirsch, Annette L.; Davin, Edouard L.; Lawrence, Dave; Hauser, Mathias; Seneviratne, Sonia I.

    2017-04-01

    Irrigation is an essential practice for sustaining global food production and many regional economies. Emerging scientific evidence indicates that irrigation substantially affects mean climate conditions in different regions of the world. Yet how this practice influences climate extremes is currently unknown. Here we use gridded observations and ensemble simulations with the Community Earth System Model to assess the impacts of irrigation on climate extremes. While the influence of irrigation on annual mean temperatures is limited, we find a large impact on temperature extremes, with a particularly strong cooling during the hottest day of the year (-0.78 K averaged over irrigated land). The strong influence on hot extremes stems from the timing of irrigation and its influence on land-atmosphere coupling strength. Together these effects result in asymmetric temperature responses, with a more pronounced cooling during hot and/or dry periods. The influence of irrigation is even more pronounced when considering subgrid-scale model output, suggesting that local effects of land management are far more important than previously thought. Finally we find that present-day irrigation is partly masking GHG-induced warming of extreme temperatures, with particularly strong effects in South Asia. Our results overall underline that irrigation substantially reduces our exposure to hot temperature extremes and highlight the need to account for irrigation in future climate projections.

  18. Legacy to the extreme

    NARCIS (Netherlands)

    A. van Deursen (Arie); T. Kuipers (Tobias); L.M.F. Moonen (Leon)

    2000-01-01

    textabstractWe explore the differences between developing a system using extreme programming techniques, and maintaining a legacy system. We investigate whether applying extreme programming techniques to legacy maintenance is useful and feasible.

  19. Legacy to the extreme

    NARCIS (Netherlands)

    Deursen, A. van; Kuipers, T.; Moonen, L.M.F.

    2000-01-01

    We explore the differences between developing a system using extreme programming techniques, and maintaining a legacy system. We investigate whether applying extreme programming techniques to legacy maintenance is useful and feasible.

  20. Is climate change modifying precipitation extremes?

    Science.gov (United States)

    Montanari, Alberto; Papalexiou, Simon Michael

    2016-04-01

    The title of the present contribution is a relevant question that is frequently posed to scientists, technicians and managers of local authorities. Although several research efforts were recently dedicated to rainfall observation, analysis and modelling, the above question remains essentially unanswered. The question comes from the awareness that the frequency of floods and the related socio-economic impacts are increasing in many countries, and climate change is deemed to be the main trigger. Indeed, identifying the real reasons for the observed increase of flood risk is necessary in order to plan effective mitigation and adaptation strategies. While mitigation of climate change is an extremely important issue at the global level, at small spatial scales several other triggers may interact with it, therefore requiring different mitigation strategies. Similarly, the responsibilities of administrators are radically different at local and global scales. This talk aims to provide insights and information to address the question expressed by its title. High resolution and long term rainfall data will be presented, as well as an analysis of the frequency of their extremes and its progress in time. The results will provide pragmatic indications for the sake of better planning flood risk mitigation policies.

  1. Extreme environment electronics

    CERN Document Server

    Cressler, John D

    2012-01-01

    Unfriendly to conventional electronic devices, circuits, and systems, extreme environments represent a serious challenge to designers and mission architects. The first truly comprehensive guide to this specialized field, Extreme Environment Electronics explains the essential aspects of designing and using devices, circuits, and electronic systems intended to operate in extreme environments, including across wide temperature ranges and in radiation-intense scenarios such as space. The Definitive Guide to Extreme Environment Electronics Featuring contributions by some of the world's foremost exp

  2. Astrobiology: Life in Extreme Environments

    Science.gov (United States)

    Kaur, Preeti

    2011-01-01

    Astrobiology is the study of the origin, evolution and distribution of life in the universe. It seeks to answer two important scientific questions: how did we get here and are we alone in the universe? Scientists begin by studying life on Earth and its limits. The discovery of extremophiles on Earth capable of surviving extremes encourages the…

  3. Astrobiology: Life in Extreme Environments

    Science.gov (United States)

    Kaur, Preeti

    2011-01-01

    Astrobiology is the study of the origin, evolution and distribution of life in the universe. It seeks to answer two important scientific questions: how did we get here and are we alone in the universe? Scientists begin by studying life on Earth and its limits. The discovery of extremophiles on Earth capable of surviving extremes encourages the…

  4. Deficiently Extremal Gorenstein Algebras

    Indian Academy of Sciences (India)

    Pavinder Singh

    2011-08-01

    The aim of this article is to study the homological properties of deficiently extremal Gorenstein algebras. We prove that if / is an odd deficiently extremal Gorenstein algebra with pure minimal free resolution, then the codimension of / must be odd. As an application, the structure of pure minimal free resolution of a nearly extremal Gorenstein algebra is obtained.

  5. Multiple Population Theory: Extreme helium population problem

    OpenAIRE

    Yi, Sukyoung K.

    2009-01-01

    The spreads in chemical abundances inferred by recent precision observations suggest that some or possibly all globular clusters can no longer be considered as simple stellar populations. The most striking case is omega Cen in the sense that its bluest main-sequence despite its high metallicity demands an extreme helium abundance of Y > 0.4. I focus on this issue of "the extreme helium population problem" in this review.

  6. EXTREMISM AND TERRORISM AS GLOBAL PROBLEMS OF MODERN SOCIETY

    Directory of Open Access Journals (Sweden)

    Lilia Yu. TAOVA

    2016-01-01

    Full Text Available The problem of combating terrorism and extremism in Russia is one of the most important due to the fact that respect for and protection of the rights and freedoms of man and citizen is the responsibility of the state (Art. 2 of the Constitution. Constitution of the Russian Federation, the bearer of sovereignty and the only source of power in the state defined by its multi-ethnic people, as well as approved by the ideological diversity, equality before the law, religious and public associations. However, the contradictions of social, economic and legal issues arising from this diversity, as well as trying to find a way out of them, are one of the urgent problems of modern world and domestic policy. The article tells about methods of struggle against extremism and terrorism.

  7. Extreme value distributions

    CERN Document Server

    Ahsanullah, Mohammad

    2016-01-01

    The aim of the book is to give a through account of the basic theory of extreme value distributions. The book cover a wide range of materials available to date. The central ideas and results of extreme value distributions are presented. The book rwill be useful o applied statisticians as well statisticians interrested to work in the area of extreme value distributions.vmonograph presents the central ideas and results of extreme value distributions.The monograph gives self-contained of theory and applications of extreme value distributions.

  8. Editorial, Volume 5, Issue 1

    Directory of Open Access Journals (Sweden)

    Kristy L. Archuleta

    2014-08-01

    Full Text Available Welcome to Volume 5, Issue 1 of the Journal of Financial Therapy! In this issue, four scholarly papers are presented along with two profiles and a book review. These four papers address very important issues, such as mental health therapists’ competency in working with financial issues, financial stress of college students, parental messages about money, and financial advice media.

  9. Statistical Model of Extreme Shear

    DEFF Research Database (Denmark)

    Hansen, Kurt Schaldemose; Larsen, Gunner Chr.

    2005-01-01

    In order to continue cost-optimisation of modern large wind turbines, it is important to continuously increase the knowledge of wind field parameters relevant to design loads. This paper presents a general statistical model that offers site-specific prediction of the probability density function...... by a model that, on a statistically consistent basis, describes the most likely spatial shape of an extreme wind shear event. Predictions from the model have been compared with results from an extreme value data analysis, based on a large number of full-scale measurements recorded with a high sampling rate...

  10. Special issue: Plasma Conversion

    NARCIS (Netherlands)

    Nozaki, T.; Bogaerts, A.; Tu, X.; van de Sanden, M. C. M.

    2017-01-01

    With growing concern of energy and environmental issues, the combination of plasma and heterogeneous catalysts receives special attention in greenhouse gas conversion, nitrogen fixation and hydrocarbon chemistry. Plasma gas conversion driven by renewable electricity is particularly important for the

  11. Research Article Special Issue

    African Journals Online (AJOL)

    2016-07-17

    Jul 17, 2016 ... Work environment in the organization is one of important issues that ... and their help we can create environments to help resolve problems in the workplace and ..... Entrepreneurship: 101 creative problem solving techniques.

  12. Rainfall variability and extremes over southern Africa: Assessment of a climate model to reproduce daily extremes

    Science.gov (United States)

    Williams, C. J. R.; Kniveton, D. R.; Layberry, R.

    2009-04-01

    It is increasingly accepted that that any possible climate change will not only have an influence on mean climate but may also significantly alter climatic variability. A change in the distribution and magnitude of extreme rainfall events (associated with changing variability), such as droughts or flooding, may have a far greater impact on human and natural systems than a changing mean. This issue is of particular importance for environmentally vulnerable regions such as southern Africa. The subcontinent is considered especially vulnerable to and ill-equipped (in terms of adaptation) for extreme events, due to a number of factors including extensive poverty, famine, disease and political instability. Rainfall variability and the identification of rainfall extremes is a function of scale, so high spatial and temporal resolution data are preferred to identify extreme events and accurately predict future variability. The majority of previous climate model verification studies have compared model output with observational data at monthly timescales. In this research, the assessment of ability of a state of the art climate model to simulate climate at daily timescales is carried out using satellite derived rainfall data from the Microwave Infra-Red Algorithm (MIRA). This dataset covers the period from 1993-2002 and the whole of southern Africa at a spatial resolution of 0.1 degree longitude/latitude. The ability of a climate model to simulate current climate provides some indication of how much confidence can be applied to its future predictions. In this paper, simulations of current climate from the UK Meteorological Office Hadley Centre's climate model, in both regional and global mode, are firstly compared to the MIRA dataset at daily timescales. This concentrates primarily on the ability of the model to simulate the spatial and temporal patterns of rainfall variability over southern Africa. Secondly, the ability of the model to reproduce daily rainfall extremes will

  13. Women in extreme poverty.

    Science.gov (United States)

    1994-01-01

    Population is estimated to increase from 5.5 billion in 1990 to 10 billion by 2050; the poverty level is expected to increase from 1 billion to 2-3 billion people. Women in development has been promoted throughout the UN and development system, but women in poverty who perform work in the informal sector are still uncounted, and solutions are elusive. The issue of extreme poverty can not be approached as just another natural disaster with immediate emergency relief. Many people live in precarious economic circumstances throughout their lives. Recent research reveals a greater understanding of the underlying causes and the need for inclusion of poor women in sustainable development. Sanitation, water, housing, health facilities need to be improved. Women must have access to education, opportunities for trading, and loans on reasonable terms. UNESCO makes available a book on survival strategies for poor women in the informal sector. The profile shows common problems of illiteracy, broken marriages, and full time involvement in provision of subsistence level existence. Existence is a fragile balance. Jeanne Vickers' "Women and the World" offers simple, low cost interventions for aiding extremely poor women. The 1992 Commission on the Status of Women was held in Vienna. Excerpts from several speeches are provided. The emphasis is on some global responses and an analysis of solutions. The recommendation is for attention to the gender dimension of poverty. Women's dual role contributes to greater disadvantages. Women are affected differently by macroeconomic factors, and that there is intergenerational transfer of poverty. Social services should be viewed as investments and directed to easing the burdens on time and energy. Public programs must be equipped to deal with poverty and to bring about social and economic change. Programs must be aware of the different distribution of resources within households. Women must be recognized as principal economic providers within

  14. Book review: Extreme ocean waves

    Science.gov (United States)

    Geist, Eric L.

    2017-01-01

    Extreme Ocean Waves”, edited by E. Pelinovsky and C. Kharif, second edition, Springer International Publishing, 2016; ISBN: 978-3-319-21574-7, ISBN (eBook): 978-3-319-21575-4The second edition of “Extreme Ocean Waves” published by Springer is an update of a collection of 12 papers edited by Efim Pelinovsky and Christian Kharif following the April 2007 meeting of the General Assembly of the European Geosciences Union. In this edition, three new papers have been added and three more have been substantially revised. Color figures are now included, which greatly aids in reading several of the papers, and is especially helpful in visualizing graphs as in the paper on symbolic computation of nonlinear wave resonance (Tobisch et al.). A note on terminology: extreme waves in this volume broadly encompass different types of waves, including deep-water and shallow-water rogue waves (which are alternatively termed freak waves), and internal waves. One new paper on tsunamis (Viroulet et al.) is now included in the second edition of this volume. Throughout the book, the reader will find a combination of laboratory, theoretical, and statistical/empirical treatment necessary for the complete examination of this subject. In the Introduction, the editors underscore the importance of studying extreme waves, documenting a dramatic instance of damaging extreme waves that recently occurred in 2014.

  15. Extreme lattices: symmetries and decorrelation

    Science.gov (United States)

    Andreanov, A.; Scardicchio, A.; Torquato, S.

    2016-11-01

    We study statistical and structural properties of extreme lattices, which are the local minima in the density landscape of lattice sphere packings in d-dimensional Euclidean space {{{R}}d} . Specifically, we ascertain statistics of the densities and kissing numbers as well as the numbers of distinct symmetries of the packings for dimensions 8 through 13 using the stochastic Voronoi algorithm. The extreme lattices in a fixed dimension of space d (d≥slant 8 ) are dominated by typical lattices that have similar packing properties, such as packing densities and kissing numbers, while the best and the worst packers are in the long tails of the distribution of the extreme lattices. We also study the validity of the recently proposed decorrelation principle, which has important implications for sphere packings in general. The degree to which extreme-lattice packings decorrelate as well as how decorrelation is related to the packing density and symmetry of the lattices as the space dimension increases is also investigated. We find that the extreme lattices decorrelate with increasing dimension, while the least symmetric lattices decorrelate faster.

  16. Extreme Velocity Wind Sensor

    Science.gov (United States)

    Perotti, Jose; Voska, Ned (Technical Monitor)

    2002-01-01

    This presentation provides an overview of the development of new hurricane wind sensor (Extreme Velocity Wind Sensor) for the Kennedy Space Center (KSC) which is designed to withstand winds of up to three hundred miles an hour. The proposed Extreme Velocity Wind Sensor contains no moveable components that would be exposed to extreme wind conditions. Topics covered include: need for new hurricane wind sensor, conceptual design, software applications, computational fluid dynamic simulations of design concept, preliminary performance tests, and project status.

  17. Study of community leaders in a nuclear host community: local issues, expectations and support and opposition

    Energy Technology Data Exchange (ETDEWEB)

    Bronfman, B. H.

    1977-08-01

    A study of community leaders was undertaken in Hartsville, Tennessee, site of the TVA Hartsville Nuclear Power Plant currently under construction. Leaders were found to be extremely supportive of the plant and of TVA's efforts to mitigate impacts expected to result from construction. Like their citizen counterparts, leaders expect economic benefits and some growth-related disruption to occur as a result of the plant, while environmental impacts are seen as extremely unlikely to occur. Plant-related issues, such as housing availability and traffic congestion, dominate leaders' thinking about current issues. These issues are expected to continue to be important in the future, and new issues dealing with growth and planning, employment and taxation are expected to arise.

  18. Classifying Returns as Extreme

    DEFF Research Database (Denmark)

    Christiansen, Charlotte

    2014-01-01

    I consider extreme returns for the stock and bond markets of 14 EU countries using two classification schemes: One, the univariate classification scheme from the previous literature that classifies extreme returns for each market separately, and two, a novel multivariate classification scheme tha...

  19. Characteristics of Extreme Auroral Charging Events

    Science.gov (United States)

    Minow, Joseph I.; Willis, Emily; Parker, Linda Neergaard

    2014-01-01

    Today’s presentation describes preliminary results from a study of extreme auroral charging in low Earth orbit. Goal of study is to document characteristics of auroral charging events of importance to spacecraft design, operations, and anomaly investigations.

  20. How does public opinion become extreme?

    CERN Document Server

    Ramos, Marlon; Reis, Saulo D S; Anteneodo, Celia; Andrade, José S; Havlin, Shlomo; Makse, Hernán A

    2014-01-01

    We investigate the emergence of extreme opinion trends in society by employing statistical physics modeling and analysis on polls that inquire about a wide range of issues such as religion, economics, politics, abortion, extramarital sex, books, movies, and electoral vote. The surveys lay out a clear indicator of the rise of extreme views. The precursor is a nonlinear relation between the fraction of individuals holding a certain extreme view and the fraction of individuals that includes also moderates, e.g., in politics, those who are "very conservative" versus "moderate to very conservative" ones. We propose an activation model of opinion dynamics with interaction rules based on the existence of individual "stubbornness" that mimics empirical observations. According to our modeling, the onset of nonlinearity can be associated to an abrupt bootstrap-percolation transition with cascades of extreme views through society. Therefore, it represents an early-warning signal to forecast the transition from moderate ...

  1. A Millennial Challenge: Extremism in Uncertain Times.

    Science.gov (United States)

    Fiske, Susan T

    2013-09-01

    This comment highlights the relevance and importance of the uncertainty-extremism topic, both scientifically and societally, identifies common themes, locates this work in a wider scientific and social context, describes what we now know and what we still do not, acknowledges some limitations, foreshadowing future directions, and discusses some potential policy relevance. Common themes emerge around the importance of social justice as sound anti-extremism policy.

  2. Extreme wind turbine response during operation

    DEFF Research Database (Denmark)

    Sørensen, John Dalsgaard; Nielsen, S.R.K.

    2007-01-01

    Estimation of extreme response values is very important for structural design of wind turbines. Due to the influence of control system and nonlinear structural behavior the extreme response is usually assessed based on simulation of turbulence time series. In this paper the problem of statistical...... provides a tool to obtain consistent estimates incl. the statistical uncertainty. An illustrative example indicates that the statistical uncertainty is important compared to the coefficient of variation of the extreme response when the number of 10 minutes simulations at each mean wind speed is limited...

  3. Bond Issues.

    Science.gov (United States)

    Pollack, Rachel H.

    2000-01-01

    Notes trends toward increased borrowing by colleges and universities and offers guidelines for institutions that are considering issuing bonds to raise money for capital projects. Discussion covers advantages of using bond financing, how use of bonds impacts on traditional fund raising, other cautions and concerns, and some troubling aspects of…

  4. Newspaper Issue.

    Science.gov (United States)

    Bourke, Thomas A.; And Others

    1986-01-01

    This special issue includes "The Microfilming of Newspapers: An Overview" (Thomas Bourke); "United States Newspaper Program: Progress and Propsects" (Larry Sullivan); "The Preservation of Canadian Newspapers" (Mary Jane Starr); "Current Filming of the New York Times at UMI" (Kenneth Tillman); and "The…

  5. An importance sampling algorithm for estimating extremes of perpetuity sequences

    DEFF Research Database (Denmark)

    Collamore, Jeffrey F.

    2012-01-01

    is efficient in the sense that it exhibits bounded relative error, and which is optimal in an appropriate asymptotic sense. The main idea of the algorithm is to use a ``dual" change of measure, which is employed to an associated Markov chain over a randomly-stopped time interval. The algorithm also makes use...

  6. Moving in extreme environments

    DEFF Research Database (Denmark)

    Lucas, Samuel J E; Helge, Jørn W; Schütz, Uwe H W;

    2016-01-01

    This review addresses human capacity for movement in the context of extreme loading and with it the combined effects of metabolic, biomechanical and gravitational stress on the human body. This topic encompasses extreme duration, as occurs in ultra-endurance competitions (e.g. adventure racing...... and transcontinental races) and expeditions (e.g. polar crossings), to the more gravitationally limited load carriage (e.g. in the military context). Juxtaposed to these circumstances is the extreme metabolic and mechanical unloading associated with space travel, prolonged bedrest and sedentary lifestyle, which may...

  7. Extremal surface barriers

    Energy Technology Data Exchange (ETDEWEB)

    Engelhardt, Netta; Wall, Aron C. [Department of Physics, University of California,Santa Barbara, CA 93106 (United States)

    2014-03-13

    We present a generic condition for Lorentzian manifolds to have a barrier that limits the reach of boundary-anchored extremal surfaces of arbitrary dimension. We show that any surface with nonpositive extrinsic curvature is a barrier, in the sense that extremal surfaces cannot be continuously deformed past it. Furthermore, the outermost barrier surface has nonnegative extrinsic curvature. Under certain conditions, we show that the existence of trapped surfaces implies a barrier, and conversely. In the context of AdS/CFT, these barriers imply that it is impossible to reconstruct the entire bulk using extremal surfaces. We comment on the implications for the firewall controversy.

  8. Lower Extremity Overuse Conditions Affecting Figure Skaters During Daily Training

    National Research Council Canada - National Science Library

    Campanelli, Valentina; Piscitelli, Francesco; Verardi, Luciano; Maillard, Pauline; Sbarbati, Andrea

    2015-01-01

    Background Most ice figure skaters train and compete with ongoing issues in the lower extremities, which are often overlooked by the skaters and considered injuries only when they prevent the athletes from skating...

  9. Preventing Radicalisation to Extreme Positions in Children and Young People. What Does the Literature Tell Us and Should Educational Psychology Respond?

    Science.gov (United States)

    Sewell, Alexandra; Hulusi, Halit

    2016-01-01

    Over the last five years the radicalisation of children and young people to extreme ideologies is fast developing as a new and important safeguarding issue for Local Authorities. Despite many high profile cases, there has yet to be a response from the educational psychology profession. This article seeks to explore the possible role for…

  10. Preventing Radicalisation to Extreme Positions in Children and Young People. What Does the Literature Tell Us and Should Educational Psychology Respond?

    Science.gov (United States)

    Sewell, Alexandra; Hulusi, Halit

    2016-01-01

    Over the last five years the radicalisation of children and young people to extreme ideologies is fast developing as a new and important safeguarding issue for Local Authorities. Despite many high profile cases, there has yet to be a response from the educational psychology profession. This article seeks to explore the possible role for…

  11. Analysis of extreme events

    CSIR Research Space (South Africa)

    Khuluse, S

    2009-04-01

    Full Text Available ) determination of the distribution of the damage and (iii) preparation of products that enable prediction of future risk events. The methodology provided by extreme value theory can also be a powerful tool in risk analysis...

  12. Extreme environments and exobiology.

    Science.gov (United States)

    Friedmann, E I

    1993-01-01

    Ecological research on extreme environments can be applied to exobiological problems such as the question of life on Mars. If life forms (fossil or extant) are found on Mars, their study will help to solve fundamental questions about the nature of life on Earth. Extreme environments that are beyond the range of adaptability of their inhabitants are defined as "absolute extreme". Such environments can serve as terrestrial models for the last stages of life in the history of Mars, when the surface cooled down and atmosphere and water disappeared. The cryptoendolithic microbial community in porous rocks of the Ross Desert in Antarctica and the microbial mats at the bottom of frozen Antarctic lakes are such examples. The microbial communities of Siberian permafrost show that, in frozen but stable communities, long-term survival is possible. In the context of terraforming Mars, selected microorganisms isolated from absolute extreme environments are considered for use in creation of a biological carbon cycle.

  13. Venous Ultrasound (Extremities)

    Science.gov (United States)

    ... News Physician Resources Professions Site Index A-Z Ultrasound - Venous (Extremities) Venous ultrasound uses sound waves to ... limitations of Venous Ultrasound Imaging? What is Venous Ultrasound Imaging? Ultrasound is safe and painless, and produces ...

  14. Statistics of extremes

    CERN Document Server

    Gumbel, E J

    2012-01-01

    This classic text covers order statistics and their exceedances; exact distribution of extremes; the 1st asymptotic distribution; uses of the 1st, 2nd, and 3rd asymptotes; more. 1958 edition. Includes 44 tables and 97 graphs.

  15. Detecting impacts of extreme events with ecological in situ monitoring networks

    Directory of Open Access Journals (Sweden)

    M. D. Mahecha

    2017-09-01

    Full Text Available Extreme hydrometeorological conditions typically impact ecophysiological processes on land. Satellite-based observations of the terrestrial biosphere provide an important reference for detecting and describing the spatiotemporal development of such events. However, in-depth investigations of ecological processes during extreme events require additional in situ observations. The question is whether the density of existing ecological in situ networks is sufficient for analysing the impact of extreme events, and what are expected event detection rates of ecological in situ networks of a given size. To assess these issues, we build a baseline of extreme reductions in the fraction of absorbed photosynthetically active radiation (FAPAR, identified by a new event detection method tailored to identify extremes of regional relevance. We then investigate the event detection success rates of hypothetical networks of varying sizes. Our results show that large extremes can be reliably detected with relatively small networks, but also reveal a linear decay of detection probabilities towards smaller extreme events in log–log space. For instance, networks with  ≈  100 randomly placed sites in Europe yield a  ≥  90 % chance of detecting the eight largest (typically very large extreme events; but only a  ≥  50 % chance of capturing the 39 largest events. These findings are consistent with probability-theoretic considerations, but the slopes of the decay rates deviate due to temporal autocorrelation and the exact implementation of the extreme event detection algorithm. Using the examples of AmeriFlux and NEON, we then investigate to what degree ecological in situ networks can capture extreme events of a given size. Consistent with our theoretical considerations, we find that today's systematically designed networks (i.e. NEON reliably detect the largest extremes, but that the extreme event detection rates are not higher than would

  16. Importance of Mangrove Ecosystem

    OpenAIRE

    Kathiresan, K.

    2012-01-01

    Mangrove forests are extremely important coastal resources, which are vital to our socio-economic development. Much of the ecological service of mangroves lies in protecting the coast from solar UV-B radiation, “green house” effects, and fury of cyclones, floods, sea level rise, wave action and coastal erosion. Mangroves contribute significantly to the global carbon cycle and produce large amounts of litter in the form of falling leaves, branches and other debris. Besides, mangrove habitats c...

  17. Theoretical Issues

    Energy Technology Data Exchange (ETDEWEB)

    Marc Vanderhaeghen

    2007-04-01

    The theoretical issues in the interpretation of the precision measurements of the nucleon-to-Delta transition by means of electromagnetic probes are highlighted. The results of these measurements are confronted with the state-of-the-art calculations based on chiral effective-field theories (EFT), lattice QCD, large-Nc relations, perturbative QCD, and QCD-inspired models. The link of the nucleon-to-Delta form factors to generalized parton distributions (GPDs) is also discussed.

  18. Important Notice

    Institute of Scientific and Technical Information of China (English)

    1998-01-01

    It seems that very few people take the trouble reading Guide for Contributors. People continue to ask us about the word/length limit etc. Please read the following rules carefully. Articles that do not follow the rules will be rejected immediately. 1. Word limit per article: less than 3000 words (less than 5 pages). 2. TEIC will become a quarterly in 1999. Each issue, 64 pages, will be published in the mid-month of a season. 3. TEIC is internationally recognized academic magazine on English Language Teaching (ELT) and its ISSN number is 1005-538X. 4. Anyone can subscribe the four issues of 1999 free of charge by filling the subscription form. Next year (2000), TEIC will charge its subscribers with a minimum printing cost. Nothing can go free forever.

  19. AWAKENING TO THE IMPORTANCE OF SOCIAL STUDIES ONCE AGAIN

    Directory of Open Access Journals (Sweden)

    Cemil Öztürk

    2011-11-01

    Full Text Available Dear Colleagues and Friends:While it is with our great pleasure to welcome and greet you with a new issue of JSSER, we have been deeply saddened by the earthquake news from Van and terrorist attacks in Çukurca (of HakkariProvince over the past few weeks. Since our organization Association for Social Studies Education Research (ASSE and journal (JSSER focus on social issues such as citizenship, poverty, social and economic equality and justice, we see extreme poverty as an important issue in the developing world. Sadly, scenes like those in Van remind us of the impoverishment and dramatic inequalities that remain in the developed countries. We as Social Studies educators need to take more action and responsibility to educate and advocate people in our community and in the world to make poverty history

  20. Extreme Programming: Maestro Style

    Science.gov (United States)

    Norris, Jeffrey; Fox, Jason; Rabe, Kenneth; Shu, I-Hsiang; Powell, Mark

    2009-01-01

    "Extreme Programming: Maestro Style" is the name of a computer programming methodology that has evolved as a custom version of a methodology, called extreme programming that has been practiced in the software industry since the late 1990s. The name of this version reflects its origin in the work of the Maestro team at NASA's Jet Propulsion Laboratory that develops software for Mars exploration missions. Extreme programming is oriented toward agile development of software resting on values of simplicity, communication, testing, and aggressiveness. Extreme programming involves use of methods of rapidly building and disseminating institutional knowledge among members of a computer-programming team to give all the members a shared view that matches the view of the customers for whom the software system is to be developed. Extreme programming includes frequent planning by programmers in collaboration with customers, continually examining and rewriting code in striving for the simplest workable software designs, a system metaphor (basically, an abstraction of the system that provides easy-to-remember software-naming conventions and insight into the architecture of the system), programmers working in pairs, adherence to a set of coding standards, collaboration of customers and programmers, frequent verbal communication, frequent releases of software in small increments of development, repeated testing of the developmental software by both programmers and customers, and continuous interaction between the team and the customers. The environment in which the Maestro team works requires the team to quickly adapt to changing needs of its customers. In addition, the team cannot afford to accept unnecessary development risk. Extreme programming enables the Maestro team to remain agile and provide high-quality software and service to its customers. However, several factors in the Maestro environment have made it necessary to modify some of the conventional extreme

  1. Uncertainty analysis in statistical modeling of extreme hydrological events

    NARCIS (Netherlands)

    Xu, Yue-Ping; Booij, Martijn J.; Tong, Yang-Bin

    2010-01-01

    With the increase of both magnitude and frequency of hydrological extreme events such as drought and flooding, the significance of adequately modeling hydrological extreme events is fully recognized. Estimation of extreme rainfall/flood for various return periods is of prime importance for hydrologi

  2. Predicting Extreme Returns and Portfolio Management Implications

    OpenAIRE

    Krieger, Kevin; Fodor, Andy; Mauck, Nathan; Stevenson, Greg

    2012-01-01

    We consider which readily observable characteristics of individual stocks (e.g., option implied volatility, accounting data, analyst data) may be used to forecast subsequent extreme price movements. We are the first to explicitly consider the predictive influence of option implied volatility in such a framework, which we unsurprisingly find to be an important indicator of future extreme price movements. However, after controlling for implied volatility levels, other factors, particularly firm...

  3. Extreme Geohazards: Reducing Disaster Risk and Increasing Resilience

    Science.gov (United States)

    Plag, Hans-Peter; Stein, Seth; Brocklebank, Sean; Jules-Plag, Shelley; Campus, Paola

    2014-05-01

    damage on a global scale for a globally connected and stressed society. In particular, large volcanic eruptions could impact climate, damage anthropogenic infrastructure and interrupt resource supplies on a global scale. The occurrence of one or more of the largest volcanic eruptions that took place during the last 2,000 years under today's conditions would likely cause global disasters or catastrophes challenging civilization. Integration of these low-probability, high-impact events in DRR requires an approach focused on resilience and antifragility, as well as the ability to cope with, and recover from failure of infrastructures and social systems. Resilience results from social capital even more than from the robustness of infrastructure. While it is important to understand the hazards through the contribution of geosciences, it is equally important to understand through the contribution of social sciences and engineering the societal processes involved with coping with hazards or leading to failure. For comprehensive development of resilience to natural hazards and, in particular, extreme geohazards, synergy between geosciences, engineering and social sciences, jointed to an improved science-policy relationship is key to success. For example, a simple cost-benefit analysis shows that a comprehensive monitoring system that could identify the onset of an extreme volcanic eruption with sufficient lead time to allow for a globally coordinated preparation makes economic sense. The WP recommends implementation of such a monitoring system with global coverage, assesses the existing assets in current monitoring systems, and illustrates many benefits, besides providing early warning for extreme volcanic eruptions. However, such a monitoring system can provide resilience only via the capability of the global community to react to early warnings. The WP recommends achieving this through the establishment of a global coordination platform comparable to IPCC's role in addressing

  4. Typologies of Extreme Longevity Myths

    Directory of Open Access Journals (Sweden)

    Robert D. Young

    2010-01-01

    Full Text Available Purpose. Political, national, religious, and other motivations have led the media and even scientists to errantly accept extreme longevity claims prima facie. We describe various causes of false claims of extraordinary longevity. Design and Methods. American Social Security Death Index files for the period 1980–2009 were queried for individuals with birth and death dates yielding ages 110+ years of age. Frequency was compared to a list of age-validated supercentenarians maintained by the Gerontology Research Group who died during the same time period. Age claims of 110+ years and the age validation experiences of the authors facilitated a list of typologies of false age claims. Results. Invalid age claim rates increase with age from 65% at age 110-111 to 98% by age 115 to 100% for 120+ years. Eleven typologies of false claims were: Religious Authority Myth, Village Elder Myth, Fountain of Youth Myth (substance, Shangri-La Myth (geographic, Nationalist Pride, Spiritual Practice, Familial Longevity, Individual and/or Family Notoriety, Military Service, Administrative Entry Error, and Pension-Social Entitlement Fraud. Conclusions. Understanding various causes of false extreme age claims is important for placing current, past, and future extreme longevity claims in context and for providing a necessary level of skepticism.

  5. Extremely deformable structures

    CERN Document Server

    2015-01-01

    Recently, a new research stimulus has derived from the observation that soft structures, such as biological systems, but also rubber and gel, may work in a post critical regime, where elastic elements are subject to extreme deformations, though still exhibiting excellent mechanical performances. This is the realm of ‘extreme mechanics’, to which this book is addressed. The possibility of exploiting highly deformable structures opens new and unexpected technological possibilities. In particular, the challenge is the design of deformable and bi-stable mechanisms which can reach superior mechanical performances and can have a strong impact on several high-tech applications, including stretchable electronics, nanotube serpentines, deployable structures for aerospace engineering, cable deployment in the ocean, but also sensors and flexible actuators and vibration absorbers. Readers are introduced to a variety of interrelated topics involving the mechanics of extremely deformable structures, with emphasis on ...

  6. Precursors of extreme increments

    CERN Document Server

    Hallerberg, S; Holstein, D; Kantz, H; Hallerberg, Sarah; Altmann, Eduardo G.; Holstein, Detlef; Kantz, Holger

    2006-01-01

    We investigate precursors and predictability of extreme events in time series, which consist in large increments within successive time steps. In order to understand the predictability of this class of extreme events, we study analytically the prediction of extreme increments in AR(1)-processes. The resulting strategies are then applied to predict sudden increases in wind speed recordings. In both cases we evaluate the success of predictions via creating receiver operator characteristics (ROC-plots). Surprisingly, we obtain better ROC-plots for completely uncorrelated Gaussian random numbers than for AR(1)-correlated data. Furthermore, we observe an increase of predictability with increasing event size. Both effects can be understood by using the likelihood ratio as a summary index for smooth ROC-curves.

  7. Weather and Climate Extremes.

    Science.gov (United States)

    1997-09-01

    Antarctica’s highest (New Zealand Antarctic Society, 1974). This extreme exceeded the record of 58°F (14.4°C) that occurred on 20 October 1956 at Esperanza ... Esperanza (also known as Bahia Esperanza , Hope Bay) was in operation from 1945 through the early 1960s. Meteorological/Climatological Factors: This extreme...cm) Location: Grand Ilet, La R’eunion Island [21°00’S, 55°30’E] Date: 26 January 1980 WORLD’S GREATEST 24-HOUR RAINFALL 72 in (182.5 cm

  8. Adventure and Extreme Sports.

    Science.gov (United States)

    Gomez, Andrew Thomas; Rao, Ashwin

    2016-03-01

    Adventure and extreme sports often involve unpredictable and inhospitable environments, high velocities, and stunts. These activities vary widely and include sports like BASE jumping, snowboarding, kayaking, and surfing. Increasing interest and participation in adventure and extreme sports warrants understanding by clinicians to facilitate prevention, identification, and treatment of injuries unique to each sport. This article covers alpine skiing and snowboarding, skateboarding, surfing, bungee jumping, BASE jumping, and whitewater sports with emphasis on epidemiology, demographics, general injury mechanisms, specific injuries, chronic injuries, fatality data, and prevention. Overall, most injuries are related to overuse, trauma, and environmental or microbial exposure.

  9. Extremal graph theory

    CERN Document Server

    Bollobas, Bela

    2004-01-01

    The ever-expanding field of extremal graph theory encompasses a diverse array of problem-solving methods, including applications to economics, computer science, and optimization theory. This volume, based on a series of lectures delivered to graduate students at the University of Cambridge, presents a concise yet comprehensive treatment of extremal graph theory.Unlike most graph theory treatises, this text features complete proofs for almost all of its results. Further insights into theory are provided by the numerous exercises of varying degrees of difficulty that accompany each chapter. A

  10. Ethica ex machina: issues in roboethics.

    Science.gov (United States)

    Mushiaki, Shigeru

    2013-12-01

    Is "roboethics" the "ethics of humans" or the "ethics of robots"? According to the Roboethics Roadmap (Gianmarco Veruggio), it is the human ethics of robot designers, manufacturers, and users. And ifroboethics roots deeply in society, artificial ethics (ethics of robots) might be put on the agenda some day. At the 1st International Symposium on Roboethics in San Remo, Ronald C. Arkin gave the presentation "Bombs, Bonding, and Bondage: Human-Robot Interaction and Related Ethical Issues" (2004). "Bondage" is the issue of enslavement and possible rebellion of robots. "Bombs" is the issue of military use of robots. And "bonding" is the issue of affective, emotional attachment of humans to robots. I contrast two extreme attitudes towards the issue of "bonding" and propose a middle ground. "Anthropomorphism" has two meanings. First, it means "human-shaped-ness." Second, it means "attribution of human characteristics or feelings to a nonhuman being (god, animal, or object)" (personification, empathy). Some say that Japanese (or East Asians) hold "animism," which makes it easy for them to treat robots like animated beings (to anthropomorphize robots); hence "Robot Kingdom Japan." Cosima Wagner criticizes such exaggeration and oversimplification as "invented tradition". I reinforce her argument with neuroscientific findings and argue that such "animism" is neither Shintoistic nor Buddhistic, but a universal tendency. Roboticists, especially Japanese roboticists emphasize that robotics is "anthropology." It is true that through the construction of humanoid robots we can better understand human beings (so-called "constructive approach"). But at the same time, we must not forget that robotic technology, like any other technology, changes our way of living and being--deeply: it can bring about our ontological transformation. In this sense, the governance of robotic technology is "governed governance." The interdisciplinary research area of technology assessment studies (TAS

  11. IMPORTANT NOTIFICATION

    CERN Multimedia

    HR Department

    2009-01-01

    Green plates, removals and importation of personal effects Please note that, as from 1 April 2009, formalities relating to K and CD special series French vehicle plates (green plates), removals and importation of personal effects into France and Switzerland will be dealt with by GS Department (Building 73/3-014, tel. 73683/74407). Importation and purchase of tax-free vehicles in Switzerland, as well as diplomatic privileges, will continue to be dealt with by the Installation Service of HR Department (Building 33/1-011, tel. 73962). HR and GS Departments

  12. Flooding hazards from sea extremes and subsidence

    DEFF Research Database (Denmark)

    Sørensen, Carlo; Vognsen, Karsten; Broge, Niels

    2015-01-01

    If we do not understand the effects of climate change and sea level rise (SLR) we cannot live in low-lying coastal areas in the future. Permanent inundation may become a prevalent issue but more often floods related to extreme events have the largest damage potential, and the management of flooding...... hazards needs to integrate the water loading from various sources. Furthermore, local subsidence must be accounted for in order to evaluate current and future flooding hazards and management options. We present the methodology (Figure) and preliminary results from the research project “Coastal Flooding...... Hazards due to Storm Surges and Subsidence” (2014-2017) with the objective to develop and test a practice oriented methodology for combining extreme water level statistics and land movement in coastal flooding hazard mapping and in climate change adaptation schemes in Denmark. From extreme value analysis...

  13. EXTREMISM AND TERRORISM ‒ GLOBAL PROBLEMS OF MODERN SOCIETY

    Directory of Open Access Journals (Sweden)

    Lily Yu. Taova

    2016-01-01

    Full Text Available The problem of combating terrorism and extremism in Russia is one of the most important due to the fact that respect for and protection of the rights and freedoms of man and citizen is the responsibility of the state (Art. 2 of the Constitution.Constitution of the Russian Federation, the bearer of sovereignty and the only source of power in the state defined by its multi-ethnic people, as well as approved by the ideological diversity, equality before the law, religious and public associations. However, the contradictions of social, economic and legal issues arising from this diversity, as well as trying to find a way out of them, are one of the urgent problems of modern world and domestic policy. Terrorism is an international scale is a powerful structure, with their equipment, and the possibility of failure. Unfortunately, modern terrorism is able to wage war and to participate in armed conflicts.Terrorism has become a very profitable business on a global scale with its own capital. Now there is a very active territorial expansion of terrorist activity, moreover, it is becoming more violent and sophisticated. The terrorist attacks have become inhuman, unmanageable and unexplained. The need to combat extremism and its extreme form - terrorist acts, including the international level for a long time is relevant to the Russian state, and especially for its law enforcement officials, and represent a real threat to the national security of the Russian Federation.The problem under consideration is that democracy must provide maximum guarantees of freedom of opinion, assembly and association, at the same time, to protect themselves from the forces whose ideology denies these principles. The article tells about methods of struggle against extremism and terrorism.

  14. Support For Distributed Programming In Extreme Style

    Directory of Open Access Journals (Sweden)

    Jacek Dajda

    2005-01-01

    Full Text Available The basic limitation emerging from practising eXtreme Programming methodology is theconstraint of close physical proximity between the members of the collaborating team including customer. This became the main idea behind research on XP supporting environmentfor geographically distributed teams. This work presents basic assumptions, elaborated architecture and selected implementation issues for the system of this type. Deliberations aresupplied with the initial results of the verification of its usability based on the users tests.

  15. Terrorism, ethnicity and Islamic extremism in Sahel

    Directory of Open Access Journals (Sweden)

    Maria Sousa Galito

    2012-01-01

    Full Text Available Terrorism is a threat in the Sahel region, where peoples and rulers seem to be losing control of the situation. Yet, the true origins of the instability are questionable. Ethnical conflicts and the religious differences, especially those related with the spreading of Islamic extremism among the local population, are two of the main reasons. This research paper analyzes different theories so as to attain some answers to these issues.

  16. Extremity perfusion for sarcoma

    NARCIS (Netherlands)

    Hoekstra, Harald Joan

    2008-01-01

    For more than 50 years, the technique of extremity perfusion has been explored in the limb salvage treatment of local, recurrent, and multifocal sarcomas. The "discovery" of tumor necrosis factor-or. in combination with melphalan was a real breakthrough in the treatment of primarily irresectable ext

  17. Acute lower extremity ischaemia

    African Journals Online (AJOL)

    tend to impact at arterial bifurcations, the commonest site being the ... Other ominous signs of advanced ischaemia include bluish ... Recommended standards for lower extremity ischaemia*. Doppler signals ... of the embolectomy procedure. An ... in a cath-lab or angio-suite under local ... We serially measure the aPTT and.

  18. Extremity perfusion for sarcoma

    NARCIS (Netherlands)

    Hoekstra, Harald Joan

    2008-01-01

    For more than 50 years, the technique of extremity perfusion has been explored in the limb salvage treatment of local, recurrent, and multifocal sarcomas. The "discovery" of tumor necrosis factor-or. in combination with melphalan was a real breakthrough in the treatment of primarily irresectable

  19. Statistics of Local Extremes

    DEFF Research Database (Denmark)

    Larsen, Gunner Chr.; Bierbooms, W.; Hansen, Kurt Schaldemose

    2003-01-01

    . A theoretical expression for the probability density function associated with local extremes of a stochasticprocess is presented. The expression is basically based on the lower four statistical moments and a bandwidth parameter. The theoretical expression is subsequently verified by comparison with simulated...

  20. de Sitter Extremal Surfaces

    CERN Document Server

    Narayan, K

    2015-01-01

    We study extremal surfaces in de Sitter space in the Poincare slicing in the upper patch, anchored on spatial subregions at the future boundary ${\\cal I}^+$, restricted to constant boundary Euclidean time slices (focussing on strip subregions). We find real extremal surfaces of minimal area as the boundaries of past lightcone wedges of the subregions in question: these are null surfaces with vanishing area. We find also complex extremal surfaces as complex extrema of the area functional, and the area is not always real-valued. In $dS_4$ the area is real and has some structural resemblance with entanglement entropy in a dual $CFT_3$. There are parallels with analytic continuation from the Ryu-Takayanagi expressions for holographic entanglement entropy in $AdS$. We also discuss extremal surfaces in the $dS$ black brane and the de Sitter "bluewall" studied previously. The $dS_4$ black brane complex surfaces exhibit a real finite cutoff-independent extensive piece. In the bluewall geometry, there are real surface...

  1. Moving in extreme environments

    DEFF Research Database (Denmark)

    Lucas, Samuel J E; Helge, Jørn W; Schütz, Uwe H W

    2016-01-01

    and transcontinental races) and expeditions (e.g. polar crossings), to the more gravitationally limited load carriage (e.g. in the military context). Juxtaposed to these circumstances is the extreme metabolic and mechanical unloading associated with space travel, prolonged bedrest and sedentary lifestyle, which may...

  2. Climate extremes and the carbon cycle (Invited)

    Science.gov (United States)

    Reichstein, M.; Bahn, M.; Ciais, P.; Mahecha, M. D.; Seneviratne, S. I.; Zscheischler, J.

    2013-12-01

    The terrestrial biosphere is a key component of the global carbon cycle and its carbon balance is strongly influenced by climate. Ongoing environmental changes are thought to increase global terrestrial carbon uptake. But evidence is mounting that rare climate extremes can lead to a decrease in ecosystem carbon stocks and therefore have the potential to negate the expected increase in terrestrial carbon uptake. Here we explore the mechanisms and impacts of climate extremes on the terrestrial carbon cycle, and propose a pathway to improve our understanding of present and future impacts of climate extremes on the terrestrial carbon budget. In addition to direct impact on the carbon fluxes of photosynthesis and respiration via extreme temperature and (or) drought, effects of extreme events may also lead to lagged responses, such as wildfires triggered by heat waves and droughts, or pest and pathogen outbreaks following wind-throw caused by heavy storms, reduced plant health due to drought stress or due to less frequent cold extremes in presently cold regions. One extreme event can potentially override accumulated previous carbon sinks, as shown by the Western European 2003 heat wave.. Extreme events have the potential to affect the terrestrial ecosystem carbon balance through a single factor, or as a combination of factors. Climate extremes can cause carbon losses from accumulated stocks, as well as long-lasting impacts on (e.g. lagged effects) on plant growth and mortality, extending beyond the duration of the extreme event itself. The sensitivity of terrestrial ecosystems and their carbon balance to climate change and extreme events varies according to the type of extreme, the climatic region, the land cover, and the land management. Extreme event impacts are very relevant in forests due to the importance of lagged and memory effects on tree growth and mortality, the longevity of tree species, the large forest carbon stocks and their vulnerability, as well as the

  3. Comparison of spatial extreme value models for snow depth extremes in Austria

    Science.gov (United States)

    Schellander, Harald; Hell, Tobias

    2017-04-01

    In Alpine regions like Austria a spatial representation of extreme snow depth is of crucial importance for numerous purposes such as the designing of construction projects. Extreme value theory builds the well-established foundation of modeling extremes. Two different approaches for the spatial modeling of snow depth extremes have been extensively investigated lately: Smooth Spatial Modeling (Blanchet and Lehning, 2010) and different classes of max-stable processes (Blanchet and Davison, 2011; Nicolet et al., 2015), both outperforming classical interpolation techniques. While max-stable models are generally considered as improvement over smooth modeling, the methods have not been compared in the context of extreme snow depth. In the present study a great variety of different GEV models is fitted to seasonal snow depth maxima measured at more than 200 Austrian weather stations. Return levels of smooth spatial models and several max-stable representations (Schlather, Brown-Resnick, Geometric Gaussian, Extremal-t) and covariance models (Powered Exponential, Brown, Whittle-Matern), also allowing for anisotropic extremal dependence are compared by a modified Anderson-Darling score and a normalized RMSE. Preliminary results show, that for snow depth extremes in Austria smooth spatial modeling and a version with extremal coefficients as covariates deliver slightly better scores than (an)-isotropic max-stable models.

  4. Extreme weather events and infectious disease outbreaks.

    Science.gov (United States)

    McMichael, Anthony J

    2015-01-01

    Human-driven climatic changes will fundamentally influence patterns of human health, including infectious disease clusters and epidemics following extreme weather events. Extreme weather events are projected to increase further with the advance of human-driven climate change. Both recent and historical experiences indicate that infectious disease outbreaks very often follow extreme weather events, as microbes, vectors and reservoir animal hosts exploit the disrupted social and environmental conditions of extreme weather events. This review article examines infectious disease risks associated with extreme weather events; it draws on recent experiences including Hurricane Katrina in 2005 and the 2010 Pakistan mega-floods, and historical examples from previous centuries of epidemics and 'pestilence' associated with extreme weather disasters and climatic changes. A fuller understanding of climatic change, the precursors and triggers of extreme weather events and health consequences is needed in order to anticipate and respond to the infectious disease risks associated with human-driven climate change. Post-event risks to human health can be constrained, nonetheless, by reducing background rates of persistent infection, preparatory action such as coordinated disease surveillance and vaccination coverage, and strengthened disaster response. In the face of changing climate and weather conditions, it is critically important to think in ecological terms about the determinants of health, disease and death in human populations.

  5. Policy issues in modern cartography

    CERN Document Server

    Taylor, DRF

    1998-01-01

    Policy Issues in Modern Cartography contains the views of national mapping agencies, legal scholars, the library community, the private sector and academia on these and many other important issues. The book begins with perspectives from national mapping agencies in Britain, Canada and the United States followed by a survey of the situation in Asia. The next three chapters deal primarily with legal issues such as copyright and intellectual property from both North American and European perspectives. Chapter 8 presents an important perspective on the key issues by a representative of the privat

  6. In This Issue

    Science.gov (United States)

    1996-07-01

    extremely useful to anyone who wants to adopt this approach. Maier (page 643) describes a pilot program in polymer science designed to interest minority students in polymer science and chemistry. This is a modular program that could be incorporated into a variety of curricula. A different approach to curriculum and outreach is the combined biology/chemistry van program described by Craney, Mazzeo, and Lord (page 646). And yet more outreach for younger children is described by Nolan and Gish (page 651). Information technology can support and aid curriculum reform. The abstract from JCE: Software is for a CD-ROM that summarizes the work of an NSF-supported materials science curriculum development project carried out by Lisensky and Ellis (page 667). The Computer Series includes a proposed addition to the typical physical chemistry curriculum by Williams, Minarik, and Nibler (page 608); it is possible because microcomputers can now do ab initio molecular orbital calculations with reasonable speed. Demonstrations have long been a part of the curriculum. They are always popular and usually instructive. Beall (page 641) reports on a conference that considered the pros and cons of demonstrations as a teaching tool. Tested Demonstrations includes a means for estimating equilibrium constants based on the odor of a solution by Anderson, Buckley, and Niewahner (page 639) as well as a way of making ion exchange visible devised by Driscoll and Villaescuesa (page 640). A very important and time consuming aspect of curriculum development is incorporation of new laboratory experiences for students. Mabrouk (page A 149) describes a laboratory that brings biochemistry to the fore. Sundback (page 669) shows how high school students can test for lead in the environment, and Rees (page 670) shows how homeowners can easily test for lead in paint. Elderd, Kildahy, and Berka (page 675) provide a way to use modern GC equipment to show students how to determine whether a fire may have been arson. In

  7. How does public opinion become extreme?

    Science.gov (United States)

    Ramos, Marlon; Shao, Jia; Reis, Saulo D. S.; Anteneodo, Celia; Andrade, José S.; Havlin, Shlomo; Makse, Hernán A.

    2015-05-01

    We investigate the emergence of extreme opinion trends in society by employing statistical physics modeling and analysis on polls that inquire about a wide range of issues such as religion, economics, politics, abortion, extramarital sex, books, movies, and electoral vote. The surveys lay out a clear indicator of the rise of extreme views. The precursor is a nonlinear relation between the fraction of individuals holding a certain extreme view and the fraction of individuals that includes also moderates, e.g., in politics, those who are “very conservative” versus “moderate to very conservative” ones. We propose an activation model of opinion dynamics with interaction rules based on the existence of individual “stubbornness” that mimics empirical observations. According to our modeling, the onset of nonlinearity can be associated to an abrupt bootstrap-percolation transition with cascades of extreme views through society. Therefore, it represents an early-warning signal to forecast the transition from moderate to extreme views. Moreover, by means of a phase diagram we can classify societies according to the percolative regime they belong to, in terms of critical fractions of extremists and people’s ties.

  8. Research progress of extreme climate and its vegetation response

    Science.gov (United States)

    Cui, Xiaolin; Wei, Xiaoqing; Wang, Tao

    2017-08-01

    The IPCC’s fifth assessment report indicates that climate warming is unquestionable, the frequency and intensity of extreme weather events may increase, and extreme weather events can destroy the growth conditions of vegetation that is otherwise in a stable condition. Therefore, it is essential to research the formation of extreme weather events and its ecological response, both in terms scientific development and the needs of societal development. This paper mainly examines these issues from the following aspects: (1) the definition of extreme climate events and the methods of studying the associated response of vegetation; (2) the research progress on extreme climate events and their vegetation response; and (3) the future direction of research on extreme climate and its vegetation response.

  9. Non-extremal branes

    Directory of Open Access Journals (Sweden)

    Pablo Bueno

    2015-04-01

    Full Text Available We prove that for arbitrary black brane solutions of generic Supergravities there is an adapted system of variables in which the equations of motion are exactly invariant under electric–magnetic duality, i.e. the interchange of a given extended object by its electromagnetic dual. We obtain thus a procedure to automatically construct the electromagnetic dual of a given brane without needing to solve any further equation. We apply this procedure to construct the non-extremal (p,q-string of Type-IIB String Theory (new in the literature, explicitly showing how the dual (p,q-five-brane automatically arises in this construction. In addition, we prove that the system of variables used is suitable for a generic characterization of every double-extremal Supergravity brane solution, which we perform in full generality.

  10. Tibetans at extreme altitude.

    Science.gov (United States)

    Wu, Tianyi; Li, Shupin; Ward, Michal P

    2005-01-01

    Between 1960 and 2003, 13 Chinese expeditions successfully reached the summit of Chomolungma (Mt Everest or Sagarmatha). Forty-five of the 80 summiteers were Tibetan highlanders. During these and other high-altitude expeditions in Tibet, a series of medical and physiological investigations were carried out on the Tibetan mountaineers. The results suggest that these individuals are better adapted to high altitude and that, at altitude, they have a greater physical capacity than Han (ethnic Chinese) lowland newcomers. They have higher maximal oxygen uptake, greater ventilation, more brisk hypoxic ventilatory responses, larger lung volumes, greater diffusing capacities, and a better quality of sleep. Tibetans also have a lower incidence of acute mountain sickness and less body weight loss. These differences appear to represent genetic adaptations and are obviously significant for humans at extreme altitude. This paper reviews what is known about the physiologic responses of Tibetans at extreme altitudes.

  11. Extremal periodic wave profiles

    Directory of Open Access Journals (Sweden)

    E. van Groesen

    2007-01-01

    Full Text Available As a contribution to deterministic investigations into extreme fluid surface waves, in this paper wave profiles of prescribed period that have maximal crest height will be investigated. As constraints the values of the momentum and energy integrals are used in a simplified description with the KdV model. The result is that at the boundary of the feasible region in the momentum-energy plane, the only possible profiles are the well known cnoidal wave profiles. Inside the feasible region the extremal profiles of maximal crest height are "cornered" cnoidal profiles: cnoidal profiles of larger period, cut-off and periodically continued with the prescribed period so that at the maximal crest height a corner results.

  12. Extremal Hairy Black Holes

    CERN Document Server

    Gonzalez, P A; Saavedra, Joel; Vasquez, Yerko

    2014-01-01

    We consider a gravitating system consisting of a scalar field minimally coupled to gravity with a self-interacting potential and an U(1) electromagnetic field. Solving the coupled Einstein-Maxwell-scalar system we find exact hairy charged black hole solutions with the scalar field regular everywhere. We go to the zero temperature limit and we study the effect of the scalar field on the near horizon geometry of an extremal black hole. We find that except a critical value of the charge of the black hole there is also a critical value of the charge of the scalar field beyond of which the extremal black hole is destabilized. We study the thermodynamics of these solutions and we find that if the space is flat then at low temperature the Reissner-Nordstr\\"om black hole is thermodynamically preferred, while if the space is AdS the hairy charged black hole is thermodynamically preferred at low temperature.

  13. Religious Extremism in Pakistan

    Science.gov (United States)

    2014-12-01

    Face (July 2008): 32. 21 Ahmed Rashid , Pakistan on the Brink: The Future of America, Pakistan, and Afghanistan (New York: Viking, 2012). 22 Brian J...promoting extremism. Commentators such as Jessica Stern, Alan Richards, Hussain Haqqani, Ahmed Rashid , and Ali Riaz are a few of the scholars who...www.jstor.org/stable/3183558; See also Ahmed Rashid , Descent Into Chaos: The United States and the Failure of Nation Building in Pakistan, Afghanistan, and

  14. USACE Extreme Sea levels

    Science.gov (United States)

    2014-03-14

    report summarising the results of the research, together with a set of recommendations arising from the research. This report describes progress to...Southampton University at HR Wallingford and subsequent teleconference with Heidi Moritz and Kate White. The notes summarising the findings of the...suggestion was made that we may want to begin talking about extreme water levels separate from storms. Ivan mentioned an analysis of storminess which

  15. Extreme geomagnetically induced currents

    Science.gov (United States)

    Kataoka, Ryuho; Ngwira, Chigomezyo

    2016-12-01

    We propose an emergency alert framework for geomagnetically induced currents (GICs), based on the empirically extreme values and theoretical upper limits of the solar wind parameters and of d B/d t, the time derivative of magnetic field variations at ground. We expect this framework to be useful for preparing against extreme events. Our analysis is based on a review of various papers, including those presented during Extreme Space Weather Workshops held in Japan in 2011, 2012, 2013, and 2014. Large-amplitude d B/d t values are the major cause of hazards associated with three different types of GICs: (1) slow d B/d t with ring current evolution (RC-type), (2) fast d B/d t associated with auroral electrojet activity (AE-type), and (3) transient d B/d t of sudden commencements (SC-type). We set "caution," "warning," and "emergency" alert levels during the main phase of superstorms with the peak Dst index of less than -300 nT (once per 10 years), -600 nT (once per 60 years), or -900 nT (once per 100 years), respectively. The extreme d B/d t values of the AE-type GICs are 2000, 4000, and 6000 nT/min at caution, warning, and emergency levels, respectively. For the SC-type GICs, a "transient alert" is also proposed for d B/d t values of 40 nT/s at low latitudes and 110 nT/s at high latitudes, especially when the solar energetic particle flux is unusually high.

  16. Detecting Non-Dominated Extreme Points for Multiple Objective Linear Programming

    Directory of Open Access Journals (Sweden)

    S. F. Tantawy

    2007-01-01

    Full Text Available Efficient extreme points in decision space of multiple objective linear programming (MOLP may not map to non dominated extreme points in objective space under the linear mapping, condition that efficient extreme points have a non dominated extreme is given, the important of this study is that the decision-Maker may depends on extreme points of the set of the objective space than that of the decision space since they have fewer extreme points.

  17. Conditional simulations for fields of extreme precipitation

    Science.gov (United States)

    Bechler, Aurélien; Vrac, Mathieu; Bel, Liliane

    2014-05-01

    Many environmental models, such as hydrological models, require input data, e.g. precipitation values, correctly simulated and distributed, even at locations where no observation is available. This is particularly true for extreme events that may be of high importance for impact studies. The last decade has seen max-stable processes emerge as a powerful tool for the statistical modeling of spatial extremes. Recently, such processes have been used in climate context to perform simulations at ungauged sites based on empirical distributions of a spatial field conditioned by observed values in some locations. In this work conditional simulations of extremal t process are investigated, taking benefits of its spectral construction. The methodology of conditional simulations proposed by Dombry et al. [2013] for Brown-Resnick and Schlather models is adapted for the extremal t process with some improvements which enlarge the possible number of conditional points. A simulation study enables to highlight the role of the different parameters of the model and to emphasize the importance of the steps of the algorithm. In this work, we focus on the French Mediterranean basin, which is a key spot of occurrences of meteorological extremes such as heavy precipitation. Indeed, major extreme precipitation are regularly observed in this region near the 'cévenol" mountains. The modeling and the understanding of these extreme precipitation - the so-called 'cévenol events" - are of major importance for hydrological studies in this complex terrain since they often trigger major floods in this region. The application of our methodology on real data in this region shows that the model and the algorithm perform well provided the stationary assumptions are fulfilled.

  18. Ethical issues in physiotherapy

    DEFF Research Database (Denmark)

    Præstegaard, Jeanette; Gard, Gunvor

    2012-01-01

    Background: An important aspect of physiotherapy professional autonomy is the ethical code of the profession, both collectively and for the individual member of the profession. The aim of this study is to explore and add additional insight into the nature and scope of ethical issues as they are u......Background: An important aspect of physiotherapy professional autonomy is the ethical code of the profession, both collectively and for the individual member of the profession. The aim of this study is to explore and add additional insight into the nature and scope of ethical issues......: The ideal of being beneficent toward the patient. Here, the ethical issues uncovered in the interviews were embedded in three code-groups: 1) ethical issues related to equality; 2) feeling obligated to do one's best; and 3) transgression of boundaries. Conclusions: In an ethical perspective, physiotherapy...... in private practice is on a trajectory toward increased professionalism. Physiotherapists in private practice have many reflections on ethics and these reflections are primarily based on individual common sense arguments and on deontological understandings. As physiotherapy by condition is characterized...

  19. Capturing spatial and temporal patterns of widespread, extreme flooding across Europe

    Science.gov (United States)

    Busby, Kathryn; Raven, Emma; Liu, Ye

    2013-04-01

    Statistical characterisation of physical hazards is an integral part of probabilistic catastrophe models used by the reinsurance industry to estimate losses from large scale events. Extreme flood events are not restricted by country boundaries which poses an issue for reinsurance companies as their exposures often extend beyond them. We discuss challenges and solutions that allow us to appropriately capture the spatial and temporal dependence of extreme hydrological events on a continental-scale, which in turn enables us to generate an industry-standard stochastic event set for estimating financial losses for widespread flooding. By presenting our event set methodology, we focus on explaining how extreme value theory (EVT) and dependence modelling are used to account for short, inconsistent hydrological data from different countries, and how to make appropriate statistical decisions that best characterise the nature of flooding across Europe. The consistency of input data is of vital importance when identifying historical flood patterns. Collating data from numerous sources inherently causes inconsistencies and we demonstrate our robust approach to assessing the data and refining it to compile a single consistent dataset. This dataset is then extrapolated using a parameterised EVT distribution to estimate extremes. Our method then captures the dependence of flood events across countries using an advanced multivariate extreme value model. Throughout, important statistical decisions are explored including: (1) distribution choice; (2) the threshold to apply for extracting extreme data points; (3) a regional analysis; (4) the definition of a flood event, which is often linked with reinsurance industry's hour's clause; and (5) handling of missing values. Finally, having modelled the historical patterns of flooding across Europe, we sample from this model to generate our stochastic event set comprising of thousands of events over thousands of years. We then briefly

  20. Top-Ten IT Issues, 2010

    Science.gov (United States)

    Ingerman, Bret L.; Yang, Catherine

    2010-01-01

    The eleventh annual EDUCAUSE Current Issues Survey shows some very familiar themes among the top-ten IT issues of strategic importance to technology leaders in higher education. Indeed, all ten of the issues from the 2009 survey are back, albeit in a slightly different order. In addition, Strategic Planning returns as an issue of renewed…

  1. Top-Ten IT Issues, 2010

    Science.gov (United States)

    Ingerman, Bret L.; Yang, Catherine

    2010-01-01

    The eleventh annual EDUCAUSE Current Issues Survey shows some very familiar themes among the top-ten IT issues of strategic importance to technology leaders in higher education. Indeed, all ten of the issues from the 2009 survey are back, albeit in a slightly different order. In addition, Strategic Planning returns as an issue of renewed…

  2. Introduction to the special issue

    Directory of Open Access Journals (Sweden)

    Gorka Elordieta

    2007-06-01

    Full Text Available For the past few years there has been an intense and increasing collaboration effort between researchers working on the Iberian languages, and this is particularly true in the realm of phonetics and phonology. The 'Journal of Portuguese Linguistics 'has played a role in contributing to stimulate such a collaborative research focusing on the Iberian languages: first with a Special Issue on 'Variation and Change in the Iberian Languages: the Peninsula and Beyond', and now with a Special Issue on the 'Prosody of Ibero-Romance and Related Languages'. In fact, to broaden its scope of coverage to the Iberian languages has become an explicit goal of the journal. As guest-editors of this issue, we are very pleased to be able to contribute to this objective, which we find an extremely fruitful one.

  3. [Imported histoplasmosis].

    Science.gov (United States)

    Stete, Katarina; Kern, Winfried V; Rieg, Siegbert; Serr, Annerose; Maurer, Christian; Tintelnot, Kathrin; Wagner, Dirk

    2015-06-01

    Infections with Histoplasma capsulatum are rare in Germany, and mostly imported from endemic areas. Infections can present as localized or disseminated diseases in immunocompromised as well as immunocompetent hosts. A travel history may be a major clue for diagnosing histoplasmosis. Diagnostic tools include histology, cultural and molecular detection as well as serology. Here we present four cases of patients diagnosed and treated in Freiburg between 2004 and 2013 that demonstrate the broad range of clinical manifestations of histoplasmosis: an immunocompetent patient with chronic basal meningitis; a patient with HIV infection and fatal disseminated disease; a patient with pulmonary and cutaneous disease and mediastinal and cervical lymphadenopathy; and an immunosuppressed patient with disseminated involvement of lung, bone marrow and adrenal glands.

  4. Myanmar; Selected Issues

    OpenAIRE

    International Monetary Fund

    2015-01-01

    This Selected Issues paper analyzes how Myanmar can manage its natural resources for people’s development. Myanmar’s natural resource endowments provide much needed national wealth to finance the country’s development. Given Myanmar’s low tax revenue, mobilizing resource revenues is particularly important in the current macroeconomic environment of widening fiscal and current account deficits, inflationary pressures and exchange rate depreciation. The government should consider revisi...

  5. Ukraine; Selected Issues

    OpenAIRE

    2008-01-01

    This Selected Issues paper investigates the economic importance of institutions in Ukraine, and attempts to quantify the potential benefits of market-friendly structural reforms. The paper reviews some of the key findings of the development-accounting literature, which has tried to explain the significant differences in income that persist across countries. It introduces the stochastic-frontier approach, outlining its key assumptions and strengths, and results obtained with the stochastic-fro...

  6. Wireless ATM : handover issues

    OpenAIRE

    Jiang, Fan; Käkölä, Timo

    1998-01-01

    Basic aspects of cellular systems and the ATM transmission technology are introduced. Wireless ATM is presented as a combination of radio ATM and mobile ATM. Radio ATM is a wireless extension of an ATM connection while mobile ATM contains the necessary extensions to ATM to support mobility. Because the current ATM technology does not support mobility, handover becomes one of the most important research issues for wireless ATM. Wireless ATM handover requirements are thus analysed. A handover s...

  7. Calibrating max-stable models of rainfall extremes at multiple timescales

    Science.gov (United States)

    Le, Phuong Dong; Leonard, Michael; Westra, Seth

    2016-04-01

    Understanding the probabilistic behaviour of extreme rainfall events is critical for estimating the risk of flooding, leading to better design of infrastructure and management of flood events. The majority of engineering design is based on estimates of the probability of extreme rainfall known as the Intensity-Frequency-Duration relationship (IDF). IDF curves are estimated at each rain gauge and are subsequently interpolated for application to ungauged locations. The pointwise nature of IDF estimates leads to difficulties, especially at sub-daily timescales, due to the sparseness of sub-daily extreme rainfall data. As a result there is greater uncertainty and potential for bias when estimating sub-daily extreme rainfall. By using a model that incorporates dependence between spatial extremes as well as across multiple timescales, there is considerable potential to improve estimates of extreme rainfall. The aim of this research is to develop max-stable models of extreme rainfall that have both spatial dependence as well as dependence across timescales. Max-stable processes are a direct extension of the univariate generalized extreme value (GEV) model into the spatial domain. Max-stable processes provide a general framework for modelling multivariate extremes with spatial dependence for just a single duration extreme rainfall. To achieve dependence across multiple timescales, Koutsoyiannis et al. (1998) proposed a mathematical framework which expresses the parameters as a function of timescale. This parameterization is important because it allows data to be incorporated from daily rainfall stations to improve estimates at sub-daily timescales. The approach therefore addresses the issue of sparseness for sub-daily stations by exploiting the denser network of daily stations. A case study in the Hawkesbury-Nepean catchment near Sydney is used, having 82 daily gauges (>50 years) and 13 sub-daily gauges (>24 years) over a region of 300 km x 300 km area. The max

  8. Extreme Programming Pocket Guide

    CERN Document Server

    Chromatic

    2003-01-01

    Extreme Programming (XP) is a radical new approach to software development that has been accepted quickly because its core practices--the need for constant testing, programming in pairs, inviting customer input, and the communal ownership of code--resonate with developers everywhere. Although many developers feel that XP is rooted in commonsense, its vastly different approach can bring challenges, frustrations, and constant demands on your patience. Unless you've got unlimited time (and who does these days?), you can't always stop to thumb through hundreds of pages to find the piece of info

  9. Mycetoma of lower extremity

    Directory of Open Access Journals (Sweden)

    Sahariah S

    1978-01-01

    Full Text Available Ten cases of mycetoma of the lower extremity were seen and treated at the Postgraduate Institute of Medical Education & Research, Chandigarh, India, during the years 1973 to 1975. Six were treated by conservative method e.g. antibiotics, sulfonamides and immobilization of the part while remaining four were submitted t o surgery. Four out o f six from the first group had recurrence and has been put on second line of therapy. Recurrence occurred in only one case from the second group and he required an above knee amputation while the remaining three are free of disease and are well rehabilitated.

  10. Metagenomics of extreme environments.

    Science.gov (United States)

    Cowan, D A; Ramond, J-B; Makhalanyane, T P; De Maayer, P

    2015-06-01

    Whether they are exposed to extremes of heat or cold, or buried deep beneath the Earth's surface, microorganisms have an uncanny ability to survive under these conditions. This ability to survive has fascinated scientists for nearly a century, but the recent development of metagenomics and 'omics' tools has allowed us to make huge leaps in understanding the remarkable complexity and versatility of extremophile communities. Here, in the context of the recently developed metagenomic tools, we discuss recent research on the community composition, adaptive strategies and biological functions of extremophiles.

  11. Characterizing Extreme Ionospheric Storms

    Science.gov (United States)

    Sparks, L.; Komjathy, A.; Altshuler, E.

    2011-12-01

    Ionospheric storms consist of disturbances of the upper atmosphere that generate regions of enhanced electron density typically lasting several hours. Depending upon the storm magnitude, gradients in electron density can sometimes become large and highly localized. The existence of such localized, dense irregularities is a major source of positioning error for users of the Global Positioning System (GPS). Consequently, satellite-based augmentation systems have been implemented to improve the accuracy and to ensure the integrity of user position estimates derived from GPS measurements. Large-scale irregularities generally do not pose a serious threat to estimate integrity as they can be readily detected by such systems. Of greater concern, however, are highly localized irregularities that interfere with the propagation of a signal detected by a user measurement but are poorly sampled by the receivers in the system network. The most challenging conditions have been found to arise following disturbances of large magnitude that occur only rarely over the course of a solar cycle. These extremely disturbed conditions exhibit behavior distinct from moderately disturbed conditions and, hence, have been designated "extreme storms". In this paper we examine and compare the behavior of the extreme ionospheric storms of solar cycle 23 (or, more precisely, extreme storms occurring between January 1, 2000, and December 31, 2008), as represented in maps of vertical total electron content. To identify these storms, we present a robust means of quantifying the regional magnitude of an ionospheric storm. Ionospheric storms are observed frequently to occur in conjunction with magnetic storms, i.e., periods of geophysical activity as measured by magnetometers. While various geomagnetic indices, such as the disturbance storm time (Dst) and the planetary Kp index, have long been used to rank the magnitudes of distinct magnetic storms, no comparable, generally recognized index exists for

  12. Winter Storms and Extreme Cold

    Science.gov (United States)

    ... Landslides & Debris Flow Nuclear Blast Nuclear Power Plants Power Outages Pandemic Radiological Dispersion Device Severe Weather Snowstorms & Extreme ... Landslides & Debris Flow Nuclear Blast Nuclear Power Plants Power Outages Pandemic Radiological Dispersion Device Severe Weather Snowstorms & Extreme ...

  13. Several important issues about current oil and gas exploration in China%关于中国当前油气勘探的几个重要问题

    Institute of Scientific and Technical Information of China (English)

    贾承造

    2012-01-01

    The gap between supply and demand for oil and gas is widening, yet exploration situation is severe in China. From the current situation of oil and gas exploration, this paper focuses on the analysis of global oil and gas exploration trend, current challenges of China's oil and gas exploration, basic problems of unconventional oil and gas exploration, as well as current oil and gas exploration theory and key issues. Global oil and gas exploration area is no longer limited by the degree of exploration, and gradually follows the trend of shifting to deep water, deep formation, unconventional, arctic area and other newly developed areas. China's key oil and gas bearing basins gradually enter the intensive oil and gas exploration, featuring that exploration depth increases, target reservoirs are more subtle, physical properties of reservoir are worse and technical difficulties of oil and gas exploration development engineering are gradually greater. Overseas oil and gas exploration development strategy of China's energy enterprises is faced with a number of challenges such as difficult block acquisition, political risk increase, higher requirements for exploration technology and so on. Geological theory and resource assessment of unconventional oil and gas and other core technologies require more researches. Borehole, fracturing and other key development technologies need to strengthen field test research. Under the guidance of new geological theory for oil and gas exploration, the paper highlights to explain 9 bottleneck problems, such as the whole process model of organic hydrocarbon generation, expulsion, migration and accumulation in the actual geological conditions, the evaluation on petroleum resource potential in the basins undergoing the tectonic transformation, pore throat structure and hydrocarbon percolation mechanism for the low permeability-tight reservoirs, hydrocarbon formation conditions and exploration direction of the large-size lithostratigraphic

  14. Current issues with research support

    Energy Technology Data Exchange (ETDEWEB)

    Russell, W.T.

    1996-03-01

    It would be difficult to condense current issues in nuclear reactor regulation to just a few minutes. So, let me start off by saying that I have not tried to give a comprehensive listing of issues that are currently facing the reactor program, but rather to select those that I thought were relevant as they relate to research activities. Use of probabilistic risk assessment in regulatory decisions; materials aging issues concerning steam generators and reactor vessels; high burnup fuels; accident management; and digital instrumentation and control, are just a sampling of the important issues that I want to talk about.

  15. "Extreme Programming" in a Bioinformatics Class

    Science.gov (United States)

    Kelley, Scott; Alger, Christianna; Deutschman, Douglas

    2009-01-01

    The importance of Bioinformatics tools and methodology in modern biological research underscores the need for robust and effective courses at the college level. This paper describes such a course designed on the principles of cooperative learning based on a computer software industry production model called "Extreme Programming" (EP).…

  16. Value-at-Risk and Extreme Returns

    NARCIS (Netherlands)

    J. Daníelsson (Jón); C.G. de Vries (Casper)

    1997-01-01

    textabstractAccurate prediction of the frequency of extreme events is of primary importance in many financial applications such as Value-at-Risk (VaR) analysis. We propose a semi-parametric method for VaR evaluation. The largest risks are modelled parametrically, while smaller risks are captured by

  17. CFRP lightweight structures for extremely large telescopes

    DEFF Research Database (Denmark)

    Jessen, Niels Christian; Nørgaard-Nielsen, Hans Ulrik; Schroll, J.

    2008-01-01

    Telescope structures are traditionally built out of steel. To improve the possibility of realizing the ambitious extremely large telescopes, materials with a higher specific stiffness and a lower coefficient of thermal expansion are needed. An important possibility is Carbon Fibre Reinforced...... Plastic (CFRP). The advantages of using CFRP for the secondary mirror support structure of the European overwhelmingly large telescope are discussed....

  18. Value-at-Risk and Extreme Returns

    NARCIS (Netherlands)

    J. Daníelsson (Jón); C.G. de Vries (Casper)

    1997-01-01

    textabstractAccurate prediction of the frequency of extreme events is of primary importance in many financial applications such as Value-at-Risk (VaR) analysis. We propose a semi-parametric method for VaR evaluation. The largest risks are modelled parametrically, while smaller risks are captured by

  19. Recent changes in precipitation extremes in Romania

    Directory of Open Access Journals (Sweden)

    Adina-Eliza CROITORU

    2014-11-01

    Full Text Available Changes in daily extreme precipitations have been identified in many studies conducted at local, regional or global scales. In Romania, only little research on this issue has been done so far. The present study is focused on the analysis of the trends in daily extreme precipitations indices over a period of 53 years (1961-2013. Data sets of daily precipitation recorded in 34 weather stations were analyzed. Among them, three are located in the Carpathian Mountains area and four are located on the Black Sea Coast. The main goal was to find changes in extreme daily precipitation using a set of 13 indices adopted from the core indices developed by ETCCDMI with appropriate modifications to suit to the studied area. The series of the indices as well as their trends were generated using RClimDex software. The trends have been calculated using the linear mean square method. The findings are similar to those obtained at the global and European continental scales and the most noteworthy are: increasing trends dominate for the most of the indices, but only about 25% of them are statistically significant at α=0.05; decreasing trends are more specific to southern area of the country; decreasing trends of  R0.1, CDD and CWD dominate for the great majority of locations; the spatial distribution of the significant slopes in the area is extremely irregular.

  20. Boundary issues

    Science.gov (United States)

    Townsend, Alan R.; Porder, Stephen

    2011-03-01

    -centric boundary (Filippelli 2008, Handoh and Lenton 2003). However, human alteration of the P cycle has multiple potential boundaries (figure 1), including P-driven freshwater eutrophication (Smith and Schindler 2009), the potential for world P supply to place an ultimate limit on food production (Smil 2000, Childers et al 2011), and depletion of soil P stocks in some world regions (MacDonald et al 2011). Carpenter and Bennett revisit the P boundary from the freshwater eutrophication perspective. Given the extraordinary variation in freshwater ecosystems across the globe, this is a challenging task, but the authors strengthen their analysis by using three different boundaries with relevance to eutrophication, along with two water quality targets and a range of estimates of P flow to the sea. In doing so, they make a compelling case that if freshwater eutrophication is indeed a Rubicon, we have already crossed it. Importantly, Carpenter and Bennett go beyond the calculation of new boundaries to make broader points about humanity's relationship with the P cycle. Disruptions of both the P and N cycles are mostly about our need for food (Galloway et al 2008, Cordell et al 2009), but unlike N, P supplies are finite and irreplaceable. Environmental concerns aside, we can fix all the N2 from the atmosphere we want—but deplete our economically viable P reserves and we're in trouble. Figure 1 Figure 1. Human alteration of the global P cycle has multiple possible boundaries. These include the environmental risks posed by freshwater eutrophication and marine anoxic events, and the food security risks that come from depletion of soil P stocks in some world regions, as well as finite global supplies of high-value mineral P reserves. Photo credits beyond authors: upper left, Shelby Riskin; upper right, Pedro Sanchez. In effect, Carpenter and Bennett argue that among P's multiple boundaries, the one for freshwaters is less forgiving of our current activities (but no less important) than is

  1. Countering Internet Extremism

    Science.gov (United States)

    2009-01-01

    literally examine hundreds of books and speeches. Since the purpose of this work is examining ways to counter an extremist’s Internet use of the...provide differing perspectives on how to counter extremist Internet use . A 2008 New York Times article indirectly offers some methods. Writers Eric...or scholars have the most potential to effectively counter extremist Internet use . Such efforts could help to stifle some of the issues that

  2. Importance sampling of severe wind gusts

    NARCIS (Netherlands)

    Bos, R.; Bierbooms, W.A.A.M.; Van Bussel, G.J.W.

    2015-01-01

    An important problem that arises during the design of wind turbines is estimating extreme loads with sufficient accuracy. This is especially difficult during iterative design phases when computational resources are scarce. Over the years, many methods have been proposed to extrapolate extreme load d

  3. Importance sampling of severe wind gusts

    NARCIS (Netherlands)

    Bos, R.; Bierbooms, W.A.A.M.; Van Bussel, G.J.W.

    2015-01-01

    An important problem that arises during the design of wind turbines is estimating extreme loads with sufficient accuracy. This is especially difficult during iterative design phases when computational resources are scarce. Over the years, many methods have been proposed to extrapolate extreme load d

  4. Ultrasonography of the lower extremity veins: Anatomy and basic approach

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Dong Kyu; Ahn, Kyung Sik; Kang, Chang Ho; Cho, Sung Bum [Dept. of Radiology, Korea University Anam Hospital, Korea University College of Medicine, Seoul (Korea, Republic of)

    2017-04-15

    Ultrasonography is an imaging modality widely used to evaluate venous diseases of the lower extremities. It is important to understand the normal venous anatomy of the lower extremities, which has deep, superficial, and perforating venous components, in order to determine the pathophysiology of venous disease. This review provides a basic description of the anatomy of the lower extremity veins and useful techniques for approaching each vein via ultrasonography.

  5. "Triangular" extremal dilatonic dyons

    CERN Document Server

    Gal'tsov, Dmitri; Orlov, Dmitri

    2014-01-01

    Explicit dyonic dilaton black holes of the four-dimensional Einstein-Maxwell-dilaton theory are known only for two particular values of the dilaton coupling constant $a =1,\\sqrt{3}$, while for other $a$ numerical evidence was presented earlier about existence of extremal dyons in theories with the discrete sequence of dilaton couplings $a=\\sqrt{n(n+1)/2}$ with integer $n$. Apart from the lower members $n=1,\\,2$, this family of theories does not have motivation from supersymmetry or higher dimensions, and so far the above quantization rule has not been derived analytically. We fill this gap showing that this rule follows from analyticity of the dilaton at the $AdS_2\\times S^2$ event horizon with $n$ being the leading dilaton power in the series expansion. We also present generalization for asymptotically anti-de Sitter dyonic black holes with spherical, plane and hyperbolic topology of the horizon.

  6. Extreme skin depth waveguides

    CERN Document Server

    Jahani, Saman

    2014-01-01

    Recently, we introduced a paradigm shift in light confinement strategy and introduced a class of extreme skin depth (e-skid) photonic structures (S. Jahani and Z. Jacob, "Transparent sub-diffraction optics: nanoscale light confinement without metal," Optica 1, 96-100 (2014)). Here, we analytically establish that figures of merit related to light confinement in dielectric waveguides are fundamentally tied to the skin depth of waves in the cladding. We contrast the propagation characteristics of the fundamental mode of e-skid waveguides and conventional waveguides to show that the decay constant in the cladding is dramatically larger in e-skid waveguides, which is the origin of sub-diffraction confinement. Finally, we propose an approach to verify the reduced skin depth in experiment using the decrease in the Goos-H\\"anchen phase shift.

  7. Pulsars and Extreme Physics

    Science.gov (United States)

    Bell-Burnell, Jocelyn

    2004-10-01

    Pulsars were discovered 35 years ago. What do we know about them now, and what have they taught us about the extremes of physics? With an average density comparable to that of the nucleus, magnetic fields around 108 T and speeds close to c these objects have stretched our understanding of the behaviour of matter. They serve as extrememly accurate clocks with which to carry out precision experiments in relativity. Created in cataclysmic explosions, pulsars are a (stellar) form of life after death. After half a billion revolutions most pulsars finally die, but amazingly some are born again to yet another, even weirder, afterlife. Pulsar research continues lively, delivering exciting, startling and almost unbelievable results!

  8. American coal imports 2015

    Energy Technology Data Exchange (ETDEWEB)

    Frank Kolojeski [TransGlobal Ventures Corp. (United States)

    2007-09-15

    As 2007 ends, the US coal industry passes two major milestones - the ending of the Synfuel tax break, affecting over 100M st annually, and the imposition of tighter and much more expensive safety measures, particularly in deep mines. Both of these issues, arriving at a time of wretched steam coal price levels, promise to result in a major shake up in the Central Appalachian mining sector. The report utilizes a microeconomic regional approach to determine whether either of these two schools of thought have any validity. Transport, infrastructure, competing fuels and regional issues are examined in detail and this forecasts estimates coal demand and imports on a region by region basis for the years 2010 and 2015. Some of the major highlights of the forecast are: Import growth will be driven by steam coal demand in the eastern and southern US; Transport will continue to be the key driver - we believe that inland rail rates will deter imports from being railed far inland and that the great majority of imports will be delivered directly by vessel, barge or truck to end users; Colombian coal will be the overwhelmingly dominant supply source and possesses a costs structure to enable it to compete with US-produced coal in any market conditions; Most of the growth will come from existing power plants - increasing capacity utilization at existing import facilities and other plants making investments to add imports to the supply portfolio - the growth is not dependent upon a lot of new coal fired capacity being built. Contents of the report are: Key US market dynamics; International supply dynamics; Structure of the US coal import market; and Geographic analysis.

  9. Issues in energy finance

    Science.gov (United States)

    Khokher, Zeigham Islam

    As opposed to the well developed and understood equity markets, the energy markets are still in their infancy. The explosion of contracts, of both the primary and derivative types, are testament both to the existing size and the untapped growth potential of this exciting industry. However, because of its relative youth many basic issues in the energy markets remain unresolved. This thesis introduces some interesting questions and provides insights into these issues. Thematically, the chapters of this thesis are linked by an emphasis on valuation and risk management decisions. A contribution of this thesis is to show that subtle differences between the endogenous price process in our general equilibrium setting and the exogenous processes considered in earlier papers can generate significant differences in both financial and real option values. In addition to these valuation concerns there has been much debate about the corporate risk management function. Finance theory suggests that a value maximizing corporation should either be indifferent to hedging or, in the presence of certain imperfections, it should completely hedge all exposures. Both these extremes contradict empirical evidence. We show that existing corporate hedging behaviour is best explained in light of both physical market imperfections and directional predictions on future prices. While these speculative motives may arise from corporate hubris or genuine informational advantages, we argue that it would be difficult to implement private information in the absence of noise traders. Related to the risk management decision is the existence of futures risk premia. These premia have been thought to be cause by covariance with priced factors or due to the hedging demands of consumers and producers. This thesis argues that inventories serve as a signal of available quantity, which coupled with consumers fears regarding stockouts can induce a positive relationship between premia and inventories. In

  10. Analysis of extreme drinking in patients with alcohol dependence using Pareto regression.

    Science.gov (United States)

    Das, Sourish; Harel, Ofer; Dey, Dipak K; Covault, Jonathan; Kranzler, Henry R

    2010-05-20

    We developed a novel Pareto regression model with an unknown shape parameter to analyze extreme drinking in patients with Alcohol Dependence (AD). We used the generalized linear model (GLM) framework and the log-link to include the covariate information through the scale parameter of the generalized Pareto distribution. We proposed a Bayesian method based on Ridge prior and Zellner's g-prior for the regression coefficients. Simulation study indicated that the proposed Bayesian method performs better than the existing likelihood-based inference for the Pareto regression.We examined two issues of importance in the study of AD. First, we tested whether a single nucleotide polymorphism within GABRA2 gene, which encodes a subunit of the GABA(A) receptor, and that has been associated with AD, influences 'extreme' alcohol intake and second, the efficacy of three psychotherapies for alcoholism in treating extreme drinking behavior. We found an association between extreme drinking behavior and GABRA2. We also found that, at baseline, men with a high-risk GABRA2 allele had a significantly higher probability of extreme drinking than men with no high-risk allele. However, men with a high-risk allele responded to the therapy better than those with two copies of the low-risk allele. Women with high-risk alleles also responded to the therapy better than those with two copies of the low-risk allele, while women who received the cognitive behavioral therapy had better outcomes than those receiving either of the other two therapies. Among men, motivational enhancement therapy was the best for the treatment of the extreme drinking behavior.

  11. Lower extremity injuries sustained while farming.

    Science.gov (United States)

    Neil, Janice A

    2002-01-01

    Today's complex farm environment can pose many threats to the lower extremities of all people especially those with chronic diseases that affect the lower extremities. The purpose of this study was to investigate the incidence of injuries to the lower extremities among farmers and to rank the importance of these incidents in order to plan prevention programs. one hundred farmers were surveyed at a large farm show in the southeastern United States. An average of 4.86 injuries per farmer were reported. Blisters from work shoes or boots, followed by injuries from animals stepping on the feet were the most common injuries. Since those with chronic illnesses are especially prone to injury and disability, regular foot assessments, evaluation, and education about the hazards of farming are mainstays of prevention.

  12. The Importance of Marine Observatories and of RAIA in Particular

    Directory of Open Access Journals (Sweden)

    Luísa Bastos

    2016-08-01

    Full Text Available Coastal and Oceanic Observatories are important tools to provide information on ocean state, phenomena and processes. They meet the need for a better understanding of coastal and ocean dynamics, revealing regional characteristics and vulnerabilities. These observatories are extremely useful to guide human actions in response to natural events and potential climate change impacts, anticipating the occurrence of extreme weather and oceanic events and helping to minimize consequent personal and material damages and costs.International organizations and local governments have shown an increasing interest in operational oceanography and coastal, marine and oceanic observations, which resulted in substantial investments in these areas. A variety of physical, chemical and biological data have been collected to better understand the specific characteristics of each ocean area and its importance in the global context. Also the general public’s interest in marine issues and observatories has been raised, mainly in relation to vulnerability, sustainability and climate change issues. Data and products obtained by an observatory are hence useful to a broad range of stakeholders, from national and local authorities to the population in general.An introduction to Ocean Observatories, including their national and regional importance, and a brief analysis of the societal interest in these observatories and related issues are presented. The potential of a Coastal and Ocean Observatory is then demonstrated using the RAIA observatory as example. This modern and comprehensive observatory is dedicated to improve operational oceanography, technology and marine science for the North Western Iberian coast, and to provide services to a large range of stakeholders.

  13. Eukaryotic Organisms in Extreme Acidic Environments, the Río Tinto Case

    Science.gov (United States)

    Angeles Aguilera, Angeles

    2013-07-01

    A major issue in microbial ecology is to identify the limits of life for growth and survival, and to understand the molecular mechanisms that define these limits. Thus, interest in the biodiversity and ecology of extreme environments has grown in recent years for several reasons. Some are basic and revolve around the idea that extreme environments are believed to reflect early Earth conditions. Others are related to the biotechnological potential of extremophiles. In this regard, the study of extremely acidic environments has become increasingly important since environmental acidity is often caused by microbial activity. Highly acidic environments are relatively scarce worldwide and are generally associated with volcanic activity or mining operations. For most acidic environments, low pH facilitates metal solubility, and therefore acidic waters tend to have high concentrations of heavy metals. However, highly acidic environments are usually inhabited by acidophilic and acidotolerant eukaryotic microorganisms such as algae, amoebas, ciliates, heliozoan and rotifers, not to mention filamentous fungi and yeasts. Here, we review the general trends concerning the diversity and ecophysiology of eukaryotic acidophilic microorganims, as well as summarize our latest results on this topic in one of the largest extreme acidic rivers, Río Tinto (SW, Spain).

  14. Eukaryotic Organisms in Extreme Acidic Environments, the Río Tinto Case

    Directory of Open Access Journals (Sweden)

    Angeles Aguilera

    2013-07-01

    Full Text Available A major issue in microbial ecology is to identify the limits of life for growth and survival, and to understand the molecular mechanisms that define these limits. Thus, interest in the biodiversity and ecology of extreme environments has grown in recent years for several reasons. Some are basic and revolve around the idea that extreme environments are believed to reflect early Earth conditions. Others are related to the biotechnological potential of extremophiles. In this regard, the study of extremely acidic environments has become increasingly important since environmental acidity is often caused by microbial activity. Highly acidic environments are relatively scarce worldwide and are generally associated with volcanic activity or mining operations. For most acidic environments, low pH facilitates metal solubility, and therefore acidic waters tend to have high concentrations of heavy metals. However, highly acidic environments are usually inhabited by acidophilic and acidotolerant eukaryotic microorganisms such as algae, amoebas, ciliates, heliozoan and rotifers, not to mention filamentous fungi and yeasts. Here, we review the general trends concerning the diversity and ecophysiology of eukaryotic acidophilic microorganims, as well as summarize our latest results on this topic in one of the largest extreme acidic rivers, Río Tinto (SW, Spain.

  15. Present-day irrigation mitigates heat extremes

    Science.gov (United States)

    Thiery, Wim; Davin, Edouard L.; Lawrence, David M.; Hirsch, Annette L.; Hauser, Mathias; Seneviratne, Sonia I.

    2017-02-01

    Irrigation is an essential practice for sustaining global food production and many regional economies. Emerging scientific evidence indicates that irrigation substantially affects mean climate conditions in different regions of the world. Yet how this practice influences climate extremes is currently unknown. Here we use ensemble simulations with the Community Earth System Model to assess the impacts of irrigation on climate extremes. An evaluation of the model performance reveals that irrigation has a small yet overall beneficial effect on the representation of present-day near-surface climate. While the influence of irrigation on annual mean temperatures is limited, we find a large impact on temperature extremes, with a particularly strong cooling during the hottest day of the year (-0.78 K averaged over irrigated land). The strong influence on extremes stems from the timing of irrigation and its influence on land-atmosphere coupling strength. Together these effects result in asymmetric temperature responses, with a more pronounced cooling during hot and/or dry periods. The influence of irrigation is even more pronounced when considering subgrid-scale model output, suggesting that local effects of land management are far more important than previously thought. Our results underline that irrigation has substantially reduced our exposure to hot temperature extremes in the past and highlight the need to account for irrigation in future climate projections.

  16. Wireless Sensor Applications in Extreme Aeronautical Environments

    Science.gov (United States)

    Wilson, William C.; Atkinson, Gary M.

    2013-01-01

    NASA aeronautical programs require rigorous ground and flight testing. Many of the testing environments can be extremely harsh. These environments include cryogenic temperatures and high temperatures (greater than 1500 C). Temperature, pressure, vibration, ionizing radiation, and chemical exposure may all be part of the harsh environment found in testing. This paper presents a survey of research opportunities for universities and industry to develop new wireless sensors that address anticipated structural health monitoring (SHM) and testing needs for aeronautical vehicles. Potential applications of passive wireless sensors for ground testing and high altitude aircraft operations are presented. Some of the challenges and issues of the technology are also presented.

  17. [Upper extremity arterial diseases].

    Science.gov (United States)

    Becker, F

    2007-02-01

    Compared to lower limb arterial diseases, upper limb arterial diseases look rare, heterogeneous with various etiologies and a rather vague clinical picture, but with a negligible risk of amputation. Almost all types of arterial diseases can be present in the upper limb, but the anatomical and hemodynamic conditions particular to the upper limb often confuse the issue. Thus, atherosclerosis affects mainly the subclavian artery in its proximal segment where the potential of collateral pathway is high making the symptomatic forms not very frequent whereas the prevalence of subclavian artery stenosis or occlusion is relatively high. The clinical examination and the etiologies are discussed according to the clinical, anatomical and hemodynamic context.

  18. Broadband for Public Libraries: Importance, Issues, and Research Needs

    Science.gov (United States)

    Mandel, Lauren H.; Bishop, Bradley Wade; McClure, Charles R.; Bertot, John Carlo; Jaeger, Paul T.

    2010-01-01

    U.S. public libraries provide free public internet services to the communities that they serve, but require robust, high-speed broadband internet connections to continue meeting public demands. The 2008-2009 "Public Library Funding & Technology Access Study" ("PLFTAS") illustrates challenges that public libraries encounter in achieving broadband…

  19. Equity crowdfunding in China : Current practice and important legal issues

    NARCIS (Netherlands)

    Li, Jing

    2017-01-01

    By studying two leading Chinese equity crowdfunding portals, namely, Renrentou and Zhongou8, this paper provides the very first empirical evidence on the practice and regulation of equity crowdfunding in China. In the case of Renrentou, I examine a hand-collected sample consisting of the investment

  20. Dose Adjustment- An Important Issue in Critical Care

    Directory of Open Access Journals (Sweden)

    Dr. M. C. Joshi

    2006-01-01

    Full Text Available There is at times marked variability in drug responsiveness especially in critically ill patients admitted in the Intensive care units. In order to obtain therapeutic effectiveness with in pharmacokinetic parameters related to therapeutic dose, it is always desirable to monitor and to maintain drug dose adjustment in such a way especially in presence of organ failure like renal failure, hepatic failure or any other clinical situation necessitating Therapeutic Drug Monitoring (TDM so that one can use safe and effective drug therapy with least toxicity due to inaccurate and invalid drug doses.

  1. Equity crowdfunding in China : Current practice and important legal issues

    NARCIS (Netherlands)

    Li, Jing

    2017-01-01

    By studying two leading Chinese equity crowdfunding portals, namely, Renrentou and Zhongou8, this paper provides the very first empirical evidence on the practice and regulation of equity crowdfunding in China. In the case of Renrentou, I examine a hand-collected sample consisting of the investment

  2. Broadband for Public Libraries: Importance, Issues, and Research Needs

    Science.gov (United States)

    Mandel, Lauren H.; Bishop, Bradley Wade; McClure, Charles R.; Bertot, John Carlo; Jaeger, Paul T.

    2010-01-01

    U.S. public libraries provide free public internet services to the communities that they serve, but require robust, high-speed broadband internet connections to continue meeting public demands. The 2008-2009 "Public Library Funding & Technology Access Study" ("PLFTAS") illustrates challenges that public libraries encounter in achieving broadband…

  3. An Important Issue: Non-Proliferation of Nuclear Weapons

    Science.gov (United States)

    Castellano, Doc

    2001-03-01

    Historic Facts and Philosophy: In August, 1947, I participated in a secret meeting concerning the validity and use of a hydrogen bomb. I vigorously supported a ``Super Manhattan Project" to build an ``H" bomb. My philosophy at the time was `bigger and better,' to ensure that no nation attacked the U.S. Our retaliation with ``H" bombs vs. ``A" bombs would be too overwhelming for any nation to risk attacking us should they obtain their own ``A" bombs. Thus, all nations would be forced to use diplomacy. I am older and wiser, and am now convinced that World Test Ban Treaties, non-proliferation of nuclear weapons, and space free of any military weapons is the best policy for all nations and humanity. With current nuclear testing at nearby Yucca Flats, Nevada, Vandenberg AF/Missile site, Cal Tech, etc., I therefore propose that our new APS California Division form a three-person committee to tabulate all pertinent data and submit it to a qualified expert for review and further action. Comments and suggestions are invited.

  4. Issues in Value-at-Risk Modeling and Evaluation

    NARCIS (Netherlands)

    J. Danielsson; C.G. de Vries (Casper); B.N. Jorgensen (Bjørn); P.F. Christoffersen (Peter); F.X. Diebold (Francis); T. Schuermann (Til); J.A. Lopez (Jose); B. Hirtle (Beverly)

    1998-01-01

    textabstractDiscusses the issues in value-at-risk modeling and evaluation. Value of value at risk; Horizon problems and extreme events in financial risk management; Methods of evaluating value-at-risk estimates.

  5. Extreme winds in Denmark

    Energy Technology Data Exchange (ETDEWEB)

    Kristensen, L.; Rathmann, O.; Hansen, S.O.

    1999-02-01

    Wind-speed data from four sites in Denmark have been analyzed in order to obtain estimates of the basic wind velocity which is defined as the 50-year wind speed under standard conditions, i.e. ten-minute averages at the height 10 m over a uniform terrain with the roughness length 0.05 m. The sites are, from west, Skjern (15 years), Kegnaes (7 years), Sprogoe (20 years), and Tystofte (15 years). The data are ten minute averages of wind speed, wind direction, temperature and pressure. The last two quantities are used to determine the air density {rho}. The data are cleaned for terrain effects by means of a slightly modified WASP technique where the sector speed-up factors and roughness lengths are linearly smoothed with a direction resolution of one degree. Assuming geotropic balance, all the wind-velocity data are transformed to friction velocity u{sub *} and direction at standard conditions by means of the geotropic drag law for neutral stratification. The basic wind velocity in 30 deg. sectors are obtained through ranking of the largest values of the friction velocity pressure 1/2{rho}u{sub *}{sup 2} taken both one every two months and once every year. The main conclusion is that the basic wind velocity is significantly larger at Skjern, close to the west coast of Jutland, than at any of the other sites. Irrespective of direction, the present standard estimates of 50-year wind are 25 {+-} 1 m/s at Skern and 22 {+-} 1 m/s at the other three sites. These results are in agreement with those obtained by Jensen and Franck (1970) and Abild (1994) and supports the conclusion that the wind climate at the west coast of Jutland is more extreme than in any other part of the country. Simple procedures to translate in a particular direction sector the standard basic wind velocity to conditions with a different roughness length and height are presented. It is shown that a simple scheme makes it possible to calculate the total 50-year extreme load on a general structure without

  6. Stacked Extreme Learning Machines.

    Science.gov (United States)

    Zhou, Hongming; Huang, Guang-Bin; Lin, Zhiping; Wang, Han; Soh, Yeng Chai

    2015-09-01

    Extreme learning machine (ELM) has recently attracted many researchers' interest due to its very fast learning speed, good generalization ability, and ease of implementation. It provides a unified solution that can be used directly to solve regression, binary, and multiclass classification problems. In this paper, we propose a stacked ELMs (S-ELMs) that is specially designed for solving large and complex data problems. The S-ELMs divides a single large ELM network into multiple stacked small ELMs which are serially connected. The S-ELMs can approximate a very large ELM network with small memory requirement. To further improve the testing accuracy on big data problems, the ELM autoencoder can be implemented during each iteration of the S-ELMs algorithm. The simulation results show that the S-ELMs even with random hidden nodes can achieve similar testing accuracy to support vector machine (SVM) while having low memory requirements. With the help of ELM autoencoder, the S-ELMs can achieve much better testing accuracy than SVM and slightly better accuracy than deep belief network (DBN) with much faster training speed.

  7. Solar extreme events

    CERN Document Server

    Hudson, Hugh S

    2015-01-01

    Solar flares and CMEs have a broad range of magnitudes. This review discusses the possibility of "extreme events," defined as those with magnitudes greater than have been seen in the existing historical record. For most quantitative measures, this direct information does not extend more than a century and a half into the recent past. The magnitude distributions (occurrence frequencies) of solar events (flares/CMEs) typically decrease with the parameter measured or inferred (peak flux, mass, energy etc. Flare radiation fluxes tend to follow a power law slightly flatter than $S^{-2}$, where S represents a peak flux; solar particle events (SPEs) follow a still flatter power law up to a limiting magnitude, and then appear to roll over to a steeper distribution, which may take an exponential form or follow a broken power law. This inference comes from the terrestrial $^{14}$C record and from the depth dependence of various radioisotope proxies in the lunar regolith and in meteorites. Recently major new observation...

  8. Detectors in Extreme Conditions

    Energy Technology Data Exchange (ETDEWEB)

    Blaj, G. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Carini, G. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Carron, S. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Haller, G. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Hart, P. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Hasi, J. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Herrmann, S. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Kenney, C. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Segal, J. [SLAC National Accelerator Lab., Menlo Park, CA (United States); Tomada, A. [SLAC National Accelerator Lab., Menlo Park, CA (United States)

    2015-08-06

    Free Electron Lasers opened a new window on imaging the motion of atoms and molecules. At SLAC, FEL experiments are performed at LCLS using 120Hz pulses with 1012 - 1013 photons in 10 femtoseconds (billions of times brighter than the most powerful synchrotrons). This extreme detection environment raises unique challenges, from obvious to surprising. Radiation damage is a constant threat due to accidental exposure to insufficiently attenuated beam, focused beam and formation of ice crystals reflecting the beam onto the detector. Often high power optical lasers are also used (e.g., 25TW), increasing the risk of damage or impeding data acquisition through electromagnetic pulses (EMP). The sample can contaminate the detector surface or even produce shrapnel damage. Some experiments require ultra high vacuum (UHV) with strict design, surface contamination and cooling requirements - also for detectors. The setup is often changed between or during experiments with short turnaround times, risking mechanical and ESD damage, requiring work planning, training of operators and sometimes continuous participation of the LCLS Detector Group in the experiments. The detectors used most often at LCLS are CSPAD cameras for hard x-rays and pnCCDs for soft x-rays.

  9. Extremal almost-Kahler metrics

    CERN Document Server

    Lejmi, Mehdi

    2009-01-01

    We generalize the notion of the Futaki invariant and extremal vector field to the general almost-Kahler case and we prove the periodicity of the extremal vector field when the symplectic form represents an integral cohomology class modulo torsion. We give also an explicit formula of the hermitian scalar curvature which allows us to obtain examples of non-integrable extremal almost-Kahler metrics saturating LeBrun's estimates.

  10. EHR and data protection issues in Italy.

    Science.gov (United States)

    Virone, Maria Gabriella

    2012-01-01

    Technological progresses and the changed way to collect, access and use data are at the bottom of the European Commission proposal for a "General Data Protection Regulation" (25 January 2012). Implications of safeguarding privacy and harmonization of existing rules are extremely important also for national Health Systems. Mobility of patients and health professionals as well as cross-border healthcare connected with the increasing use of Information and Communication Technologies in Healthcare Services are modifying traditional medical approaches and applications. New tools, as Electronic Health Records, provide significant benefits as empowering health consumers and minimizing health costs. Anyway, EHRs have limits: for example, they should cause risks for individuals, professionals and institutions in terms of personal injuries and liabilities. In this scenario, it's evident that technical aspects (as health standards and interoperability) are as important as legal and regulatory privacy issues. Presently, mandatory acts on the protection of individuals with regard to the processing of health e-Data still missing at all levels. Italy is adopting binding and non-binding legal documents to tackle the problem. Are they enough?

  11. Likelihood estimators for multivariate extremes

    KAUST Repository

    Huser, Raphaël

    2015-11-17

    The main approach to inference for multivariate extremes consists in approximating the joint upper tail of the observations by a parametric family arising in the limit for extreme events. The latter may be expressed in terms of componentwise maxima, high threshold exceedances or point processes, yielding different but related asymptotic characterizations and estimators. The present paper clarifies the connections between the main likelihood estimators, and assesses their practical performance. We investigate their ability to estimate the extremal dependence structure and to predict future extremes, using exact calculations and simulation, in the case of the logistic model.

  12. Professional Emergence on Transnational Issues

    DEFF Research Database (Denmark)

    Seabrooke, Leonard; Tsingou, Eleni

    2015-01-01

    they are conceptually linked by actors and organizations. A linked ecologies approach asks us to displace locating known actors within structures and instead pays attention to professional interactions on how ‘issue distinctions’ are made, the relationship between issue distinctions and professional tasks, and who......Addressing complex transnational problems requires coordination from different professionals. The emergence of new actors and issues has been addressed by those interested in studies of organizations through concepts and methods that highlight the importance of communities, fields, and networks....... These approaches are important in identifying the sources of what becomes established, but less geared to identifying interactions that are emergent. This article extends a linked ecologies approach to emergence, arguing that interaction on transnational issues should first be understood by how...

  13. Estudo Transcultural sobre Liderança em Relações Públicas e Gestão da Comunicação: análise quantitativa dos temas de maior importância para os brasileiros / Transcultural Study on Leadership in Public Relations and Communication Management: quantitative analysis of the issues of greatest importance to the Brazilians

    Directory of Open Access Journals (Sweden)

    Andréia Athaydes

    2013-12-01

    Full Text Available Este artigo apresenta o relato parcial de uma investigação realizada em âmbito internacional, sob coordenação da Universidade do Alabama e do The Plank Center Institute (EUA, a fim de compreender como as constantes e rápidas mudanças políticas, econômicas e sociais impactam nas rotinas e no desempenho dos gestores em RP e Comunicação. As impressões foram obtidas através de questionário online e entrevistas em profundidade com gestores de RP e Comunicação de diferentes organizações. Aqui, são detalhados os dados quantitativos referentes à primeira seção do questionário online, que buscou conhecer, entre 10 temas pré-definidos, quais os de maior importância para os participantes. Estar preparado para lidar eficazmente com as crises, lidar com a velocidade e volume do fluxo de informação e melhorar os indicadores de comunicação para demonstrar o valor do trabalho realizado são as principais preocupações dos gestores. / This article presents part of an investigation into an international, coordinated by the University of Alabama and The Plank Center Institute (USA in order to understand how the constant and rapidly changing political, economic and social impact in the routines and performance of managers in PR and Communications. The prints were obtained through online questionnaire and in-depth interviews with managers of PR and Communication of different organizations. Here are detailed quantitative data relating to the first section of the online questionnaire, which sought to know from 10 predefined themes, which are the most important to the participants. Be prepared to deal effectively with crises, handle the speed and volume of information flow and improve communication indicators to demonstrate the value of the work performed are the main concerns of managers.

  14. The Rise of the Extreme Right in Europe%The Rise of the Extreme Right in Europe

    Institute of Scientific and Technical Information of China (English)

    Zhang Jian

    2011-01-01

    The rise of the extreme right in Europe in recent years is an important political and social phenomenon. On 22 July 2011, a terror attackcarded out by an extreme-right-wing Norwegian zealot shocked the whole European community. This event once again highlighted the seriousness of the European right-wing extremism. Why are extreme-fight forces growing so rapidly in Europe? How will this influence not only European social and political development but also future foreign policy? This paper presents a preliminary study of developments in this area.

  15. Extreme events in gross primary production: a characterization across continents

    Directory of Open Access Journals (Sweden)

    J. Zscheischler

    2014-01-01

    Full Text Available Climate extremes can affect the functioning of terrestrial ecosystems, for instance via a reduction of the photosynthetic capacity or alterations of respiratory processes. Yet the dominant regional and seasonal effects of hydrometeorological extremes are still not well documented. Here we quantify and characterize the role of large spatiotemporal extreme events in gross primary production (GPP as triggers of continental anomalies. We also investigate seasonal dynamics of extreme impacts on continental GPP anomalies. We find that the 50 largest positive (increase in uptake and negative extremes (decrease in uptake on each continent can explain most of the continental variation in GPP, which is in line with previous results obtained at the global scale. We show that negative extremes are larger than positive ones and demonstrate that this asymmetry is particularly strong in South America and Europe. Most extremes in GPP start in early summer. Our analysis indicates that the overall impacts and the spatial extents of GPP extremes are power law distributed with exponents that vary little across continents. Moreover, we show that on all continents and for all data sets the spatial extents play a more important role than durations or maximal GPP anomaly when it comes to the overall impact of GPP extremes. An analysis of possible causes implies that across continents most extremes in GPP can best be explained by water scarcity rather than by extreme temperatures. However, for Europe, South America and Oceania we identify also fire as an important driver. Our findings are consistent with remote sensing products. An independent validation against a literature survey on specific extreme events supports our results to a large extent.

  16. Software Tool Issues

    Science.gov (United States)

    Hennell, Michael

    This chapter relies on experience with tool development gained over the last thirty years. It shows that there are a large number of techniques that contribute to any successful project, and that formality is always the key: a modern software test tool is based on a firm mathematical foundation. After a brief introduction, Section 2 recalls and extends the terminology of Chapter 1. Section 3 discusses the the design of different sorts of static and dynamic analysis tools. Nine important issues to be taken into consideration when evaluating such tools are presented in Section 4. Section 5 investigates the interplay between testing and proof. In Section 6, we call for developers to take their own medicine and verify their tools. Finally, we conclude in Section 7 with a summary of our main messages, emphasising the important role of testing.

  17. Extreme Ritualistic Alcohol Consumption among College Students on Game Day

    Science.gov (United States)

    Glassman, Tavis J.; Dodd, Virginia J.; Sheu, Jiunn-Jye; Rienzo, Barbara A.; Wagenaar, Alex C.

    2010-01-01

    Alcohol use and the related consequences associated with college football games are a serious public health issue for university communities. Objective: Examining "Extreme Ritualistic Alcohol Consumption" (ERAC), defined as consuming 10 or more drinks on game day for a male, and 8 or more drinks for a female, is the focus of this study.…

  18. Extreme Ritualistic Alcohol Consumption among College Students on Game Day

    Science.gov (United States)

    Glassman, Tavis J.; Dodd, Virginia J.; Sheu, Jiunn-Jye; Rienzo, Barbara A.; Wagenaar, Alex C.

    2010-01-01

    Alcohol use and the related consequences associated with college football games are a serious public health issue for university communities. Objective: Examining "Extreme Ritualistic Alcohol Consumption" (ERAC), defined as consuming 10 or more drinks on game day for a male, and 8 or more drinks for a female, is the focus of this study.…

  19. Top-Ten IT Issues: 2009

    Science.gov (United States)

    Agee, Anne Scrivener; Yang, Catherine

    2009-01-01

    This article presents the top-ten IT-related issues in terms of strategic importance to the institution, as revealed by the tenth annual EDUCAUSE Current Issues Survey. These IT-related issues include: (1) Funding IT; (2) Administrative/ERP Information Systems; (3) Security; (4) Infrastructure/Cyberinfrastructure; (5) Teaching and Learning with…

  20. Attitude extremity, consensus and diagnosticity

    NARCIS (Netherlands)

    van der Pligt, J.; Ester, P.; van der Linden, J.

    1983-01-01

    Studied the effects of attitude extremity on perceived consensus and willingness to ascribe trait terms to others with either pro- or antinuclear attitudes. 611 Ss rated their attitudes toward nuclear energy on a 5-point scale. Results show that attitude extremity affected consensus estimates. Trait

  1. Gender, Education, Extremism and Security

    Science.gov (United States)

    Davies, Lynn

    2008-01-01

    This paper examines the complex relationships between gender, education, extremism and security. After defining extremism and fundamentalism, it looks first at the relationship of gender to violence generally, before looking specifically at how this plays out in more extremist violence and terrorism. Religious fundamentalism is also shown to have…

  2. Grassland responses to precipitation extremes

    Science.gov (United States)

    Grassland ecosystems are naturally subjected to periods of prolonged drought and sequences of wet years. Climate change is expected to enhance the magnitude and frequency of extreme events at the intraannual and multiyear scales. Are grassland responses to extreme precipitation simply a response to ...

  3. The Antidote to Extremism

    Science.gov (United States)

    Jackson, Anthony

    2016-01-01

    For centuries, education has been seen as an antidote to intolerance and conflict. In a world rocked by violence, much of it across cultural borders, developing students' cultural understanding has become more important than ever. In this article, Asia Society vice president Anthony Jackson discusses how two high schools in the Society's…

  4. Strangeness At Extremes

    CERN Document Server

    Tolos, Laura; Khemchandani, Kanchan; Martinez-Torres, Alberto; Bratkovskaya, Elena; Aichelin, Joerg; Nielsen, Marina; Navarra, Fernando S

    2015-01-01

    We study the properties of strange mesons in vacuum and in the hot nuclear medium within unitarized coupled-channel effective theories. We determine transition probabilities, cross sections and scattering lengths for strange mesons. These scattering observables are of fundamental importance for understanding the dynamics of strangeness production and propagation in heavy-ion collisions.

  5. Extremely secure identification documents

    Energy Technology Data Exchange (ETDEWEB)

    Tolk, K.M. [Sandia National Labs., Albuquerque, NM (United States); Bell, M. [Sandia National Labs., Livermore, CA (United States)

    1997-09-01

    The technology developed in this project uses biometric information printed on the document and public key cryptography to ensure that an adversary cannot issue identification documents to unauthorized individuals or alter existing documents to allow their use by unauthorized individuals. This process can be used to produce many types of identification documents with much higher security than any currently in use. The system is demonstrated using a security badge as an example. This project focused on the technologies requiring development in order to make the approach viable with existing badge printing and laminating technologies. By far the most difficult was the image processing required to verify that the picture on the badge had not been altered. Another area that required considerable work was the high density printed data storage required to get sufficient data on the badge for verification of the picture. The image processing process was successfully tested, and recommendations are included to refine the badge system to ensure high reliability. A two dimensional data array suitable for printing the required data on the badge was proposed, but testing of the readability of the array had to be abandoned due to reallocation of the budgeted funds by the LDRD office.

  6. Mitigation Efforts in Rural Communities after Extreme Weather Events - New Insights for Stakeholders

    Directory of Open Access Journals (Sweden)

    Vesela Radovic

    2016-09-01

    Full Text Available Global climate changes are undoubtedly course of the increasing frequency of extreme whether events all over the world. Rural communities belong to the “group of victims” which is greatly jeopardized by consequences of the extreme weather events. Having in mind limited capacities for the preparedness, response and recovery after any kind of emergency it is clear that the rural community mostly needs external help. That is the point of this paper: to make new insights about this important issue, and to discuss: “how to provide adequate help in the rural communities and build adequate adaptive and response capacities”. In many countries agriculture and rural tourism are main economic activities in the rural area and its interruption could be the obstacle for implementation of sustainable development. Various stakeholders omit to be aware of this issue. Emergency agencies and many others have to make the comprehensive plan for rural communities (having in mind all its limitations. In the Republic of Serbia rural communities do not have enough capacity for recovery and usually it takes many years after an event. A minimum of an economic recovery standard has to be created for the rural community. It also has to be a specific contingency plan in the future reorganizations of emergency services in Serbia and at the Western Balkan region. It should be one of the priority issues for stakeholders in the near future in disaster risk reduction. Providing equal access to resources to population in the rural community after the extreme weather event has to be the priority task for policy makers and all actors in emergency management.

  7. Design and Manufacturing of Extremely Low Mass Flight Systems

    Science.gov (United States)

    Johnson, Michael R.

    2002-01-01

    Extremely small flight systems pose some unusual design and manufacturing challenges. The small size of the components that make up the system generally must be built with extremely tight tolerances to maintain the functionality of the assembled item. Additionally, the total mass of the system is extremely sensitive to what would be considered small perturbations in a larger flight system. The MUSES C mission, designed, built, and operated by Japan, has a small rover provided by NASA that falls into this small flight system category. This NASA-provided rover is used as a case study of an extremely small flight system design. The issues that were encountered with the rover portion of the MUSES C program are discussed and conclusions about the recommended mass margins at different stages of a small flight system project are presented.

  8. Soil:An Extreme Habitat for Microorganisms?

    Institute of Scientific and Technical Information of China (English)

    M.BOLTER

    2004-01-01

    The question is asked whether soils can be regarded as extreme environments with respect to microorganisms. After defining some extreme environments in a general sense, special properties of extreme environments are compared to soil habitats, with special emphasis laid on time frame and localities. In relation to water availability, nutrients and other properties, such places as aggregates can show properties of extreme habitats. These features, which can act at different levels of the system from the community level down to the cellular level, are summarized as stress factors. The latter,where many switches are located leading to different strategies of survival, is described as the most important one. This raises the question of how organisms have adapted to such conditions. The soil system demands a broad spectrum of adaptations and/or adjustments for a highly variable environment.The soil microorganisms'adaptation can thus be seen as the highest kind of flexibility and is more useful than any other special adaptation.

  9. Anders Breivik: Extreme Beliefs Mistaken for Psychosis.

    Science.gov (United States)

    Rahman, Tahir; Resnick, Phillip J; Harry, Bruce

    2016-03-01

    The case of Anders Breivik, who committed mass murder in Norway in 2011, stirred controversy among forensic mental health experts. His bizarrely composed compendium and references to himself as the "Knights Templar" raised concerns that he had a psychotic mental illness. Beliefs such as Mr. Breivik's that precede odd, unusual, or extremely violent behavior present a unique challenge to the forensic evaluator, who sometimes struggles to understand those beliefs. Psychotic disorder frequently is invoked to characterize odd, unusual, or extreme beliefs, with a classification that has evolved over time. However, the important concept of overvalued idea, largely ignored in American psychiatry, may better characterize these beliefs in some cases. We discuss the definitions of delusion and overvalued ideas in the context of Anders Breivik's rigidly held extreme beliefs. We also review the British definition of overvalued idea and discuss McHugh's construct, to introduce the term "extreme overvalued belief" as an aid in sharpening the forensic evaluator's conceptualization of these and similar beliefs. © 2016 American Academy of Psychiatry and the Law.

  10. GLOBALIZATION AND IMPORT RISKS

    Directory of Open Access Journals (Sweden)

    Popa Ioan

    2014-07-01

    Full Text Available Delocalization of production and diversification of the sources of offer in the global market place the issue of protection of consumer rights in major consumption centres, namely the European Union in a new light. A review of policies for the protection of consumer rights in the EU, USA and China, reveals major differences regarding the protection of consumer rights and the existence of gaps, and in particular the implementation of effective legislation in this regard. As such, the risks associated with imports have become a major concern in the European Union. The consumer has – one can say – a central role in the globalization process, which justifies the measures aimed at its protection. Although worldwide there are major differences in the degree of market regulation in matters of protection of consumer rights, the trend is the continuous adaptation of the offer to the requirements of global demand. However, one can still find significant gaps which translate into risks specific to the consumers in developed countries, namely in the EU. An important issue arises from this radical change of the localization of production centres in relation to the main consumption centres. While in the developed world, consumer rights protection has reached high levels both by creating an appropriate legislative framework and through consumer awareness and activism regarding their rights, in areas where much of the offer comes from the Western market (China, India, etc. modern mentality on the protection of consumer rights is just emerging. A major requirement is therefore the provision of a status of the consumer compatible with the benefits and risks of globalization, a status defined by safety and protection of imports. This paper confirms the thesis that, ultimately, the main factor counteracting the risks in matters of protection of consumer rights is the consumer, its awareness of its rights.

  11. Extreme Thrombocytosis and Cardiovascular Surgery

    Science.gov (United States)

    Natelson, Ethan A.

    2012-01-01

    Extreme thrombocytosis is a major risk factor for excessive bleeding and for thrombosis, either of which can complicate cardiovascular surgical and interventional procedures. Extreme thrombocytosis can also cause an unusual syndrome, erythromelalgia, that results in a type of chronic microvascular occlusive arterial disease. We present the differential diagnosis of conditions that may lead to extreme thrombocytosis, 3 cases (each of which illustrates a different potential complication), and a review of the pertinent medical literature. Correcting excessive thrombocytosis is typically not difficult, whether electively or acutely, and effective therapy usually controls thrombosis and excessive hemorrhage postprocedurally. PMID:23304015

  12. Ethical issues in nanotechnology.

    Science.gov (United States)

    Florczyk, Stephen J; Saha, Subrata

    2007-01-01

    Nanotechnology is a rapidly developing area in science involved with manipulating matter at the atomic or molecular level. Nanotechnology is typically defined at a scale on the order of less than approximately 100 nm. Matter possesses unique properties at these size levels that are neither Newtonian nor quantum, but between the two regimes.These unique properties have created significant interest and excitement, sparking numerous research investigations. Nanotechnology is a very broad field with many current and potential applications. Some important examples of applications include battlefield activated dynamic armor clothing for soldiers, additives to sunscreens, and diagnostic laboratories on a chip to monitor general personal health. Groundbreaking capabilities often raise new questions. Any new scientific or technological development has the usual concomitant associated ethical issues, specifically regarding containment and regulation. These ethical issues are more pronounced with nanotechnology due to the sharp divide between those who see its great potential and opponents who express fears. Nanotechnology supporters believe that it has the potential to transform our lives dramatically, while opponents of nanotechnology fear that self-replicating "nanobots" could escape from laboratories and reduce all life on earth to "gray goo. "These fears have swayed generally uninformed public opinions via the media and sensational entertainment. A critical discussion of ethical issues surrounding nanotechnology, including the interaction of nanotechnology with the body and the environment--nanobiotechnology--and regulation of nanotechnology, is presented. We advocate strong, uniform regulations for nanotechnology, but only the use of regulations as needed. The limited use of regulations prevents the regulations from becoming burdensome and inhibiting research in the field.

  13. Sarcophagidae (Diptera de importancia forense en la puna de Catamarca, Argentina: a ovoviviparidad como ventaja en condiciones de extrema aridez Sarcophagidae (Diptera of forensic importance at a high altitude desert in Catamarca, Argentina: ovoviviparity as an advantage under extreme arid conditions

    Directory of Open Access Journals (Sweden)

    Fernando H. Aballay

    2011-12-01

    pig carcasses, one located in the shade and the other in the sun, and a third carcass of a lama located in the sun, were used. We collected 597 individuals belonging to five Sarcophagidae species: Microcerella antofagastensis Mulieri, Mariluis & Aballay (n=347, M. quimaliensis (Lopes (n=117, M. rusca (Hall (n=32, M. penai (Lopes (n=5 and M. aulacophyto Pape (n=96. Both M. antofagastensis and M. quimaliensis were the effective colonizers and represented 78% of the total adults collected. Microcerella antofagastensis was the primary colonizer. Both species had a similar response against microenvironmental conditions and both preferred the pig carcass. We discuss the importance of these two species as forensic indicators and the advantages of ovoviviparity against other oviparous species under extreme arid conditions.

  14. Currently important animal disease management issues in sub-Saharan Africa : policy and trade issues

    Directory of Open Access Journals (Sweden)

    G.R. Thomson

    2009-09-01

    Full Text Available The present international approach to management of transboundary animal diseases (TADs is based on the assumption that most can be eradicated ; consequently, that is the usual objective adopted by international organizations concerned with animal health. However, for sub-Saharan Africa and southern Africa more particularly, eradication of most TADs is impossible for the foreseeable future for a variety of technical, financial and logistical reasons. Compounding this, the present basis for access to international markets for products derived from animals requires that the area of origin (country or zone is free from trade-influencing TADs. The ongoing development of transfrontier conservation areas (TFCAs, extending across huge areas of southern Africa, therefore presents a development conundrum because it makes creation of geographic areas free from TADs more difficult and brings development based on wildlife conservation on the one hand and that based on livestock production on the other into sharp conflict. Sub-Saharan Africa is consequently confronted by a complex problem that contributes significantly to retarded rural development which, in turn, impedes poverty alleviation. In southern Africa specifically, foot-and-mouth disease (FMD presents the greatest problem in relation to access to international markets for animal products. However, it is argued that this problem could be overcome by a combination between (1 implementation of a commodity-based approach to trade in products derived from animals and (2 amendment of the international standards for FMD specifically (i.e. the FMD chapter in the Terrestrial Animal Health Code of the World Organisation for Animal Health [OIE] so that occurrence of SAT serotype viruses in free-living African buffalo need not necessarily mean exclusion of areas where buffalo occur from international markets for animal products. This would overcome a presently intractable constraint to market access for southern African countries and enable conservation and livestock production to be more effectively integrated, to the benefit of both.

  15. Ethical & Legal Issues in School Counseling. Chapter 6: Special Issues.

    Science.gov (United States)

    Sampson, James P., Jr.; And Others

    This document contains chapter 6 (5 articles) of a collection of 35 articles primarily from American Association for Counseling and Development (AACD) publications on the most important legal and ethical topics about which all school counselors need to be informed. "Ethical Issues Involved With the Use of Computer-Assisted Counseling, Testing, and…

  16. Propagation of precipitation extremes into discharge extremes in a changing climate

    Science.gov (United States)

    Piras, Monica; Mascaro, Giuseppe; Deidda, Roberto; Vivoni, Enrique R.

    2015-04-01

    sub-basins with loamy soils. Hence, both soil properties and topography play an important role in the basin response to extreme events.

  17. Habitability in Extreme Conditions

    Science.gov (United States)

    de Lobkowicz, Ysaline; de Crombrugghe, Guerric; Le Maire, Victor; Jago, Alban; Denies, Jonathan; van Vynckt, Delphine; Reydams, Marc; Mertens, Alexandre

    A manned space mission could be perfectly prepared in terms of sciences and technologies, but without a good habitat, a place where the needs of the crew are respected, this isolation and confinement can turn into a nightmare. There is the limitation of engineering: it is more than important to take care about architecture, when human lives are part of the experiment. The goal of the research is the analysis of the hard life of isolation and confinement in Mars' hostile environment and how architecture is a way to improve it. The objective is to place the human in the middle of the analysis. What does a person really need? Therefore Maslow's idea, the pyramid of primary needs, gives us the hierarchy to follow: first survival, food and beverage, then sleep, and only then protection, social activities and work. [1] No more luxury. If all these aspects are respected, a human is able to survive, like it did since so many years. The idea is that each of these main activities has to be related to a different type of space, to provide variability in this close environment. For example, work and relaxing areas have to be separated; a human being needs time for himself, without concentration. A workspace and a relaxing area have a different typology, different colours and lighting, dimensions, furniture. This has also to be respected in a spacecraft. For this research, different sources are used, mainly in the psychological aspect, which is the most important. [2] Therefore questionnaires, interviews, diaries of past expeditions are full of treasures. We do not have to search too far: on earth; polar expeditions, submarines, military camps, etc., give a lot of information. Some very realistic simulations, as on the Mars Desert Research Station (MDRS), will also be used as material: a good analysis of the defaults and well-organized part of the station can conduct to important conclusions. [3] A found analysis and a well-designed habitat are considerable keys for the success

  18. E.X.T.R.E.M.E. project. Launch; Projet EXTREME. Rapport de lancement

    Energy Technology Data Exchange (ETDEWEB)

    Eyrolle, F.; Charmasson, S.; Masson, O

    2005-07-01

    Due to the drastic decrease in artificial radioactivity levels from primary sources such as atmospheric fallout or industrial releases, radioactive storages constituted in the past within several environmental compartments act today as non negligible secondary sources. These delayed sources are particularly active during extreme weather or climatic events such as rainfalls or atmospheric deposits, floods, storms, etc...that may remove important mass, generate activity levels higher than the predicted ones from modeling based on mean transfer process, and produce in a couple of hours or days fluxes similar to those accrued over several month or years. Extreme aims at assessing the consequences on man and its environment of natural events that generate extreme radioactive stocks and/or fluxes within several environmental compartments (atmosphere, soils, rivers, coastal marine environment and deep sea areas). (authors)

  19. Extreme hypertriglyceridemia managed with insulin.

    Science.gov (United States)

    Thuzar, Moe; Shenoy, Vasant V; Malabu, Usman H; Schrale, Ryan; Sangla, Kunwarjit S

    2014-01-01

    Extreme hypertriglyceridemia can lead to acute pancreatitis and rapid lowering of serum triglycerides (TG) is necessary for preventing such life-threatening complications. However, there is no established consensus on the acute management of extreme hypertriglyceridemia. We retrospectively reviewed 10 cases of extreme hypertriglyceridemia with mean serum TG on presentation of 101.5 ± 23.4 mmol/L (8982 ± 2070 mg/dL) managed with insulin. Serum TG decreased by 87 ± 4% in 24 hours in those patients managed with intravenous insulin and fasting and 40 ± 8.4% in those managed with intravenous insulin alone (P = .0003). The clinical course was uncomplicated in all except 1 patient who subsequently developed a pancreatic pseudocyst. Thus, combination of intravenous insulin with fasting appears to be an effective, simple, and safe treatment strategy in immediate management of extreme hypertriglyceridemia. Crown Copyright © 2014. Published by Elsevier Inc. All rights reserved.

  20. Moment methods in extremal geometry

    NARCIS (Netherlands)

    De Laat, D.

    2016-01-01

    In this thesis we develop techniques for solving problems in extremal geometry. We give an infinite dimensional generalization of moment techniques from polynomial optimization. We use this to construct semidefinite programming hierarchies for approximating optimal packing densities and ground state

  1. Moment methods in extremal geometry

    NARCIS (Netherlands)

    De Laat, D.

    2016-01-01

    In this thesis we develop techniques for solving problems in extremal geometry. We give an infinite dimensional generalization of moment techniques from polynomial optimization. We use this to construct semidefinite programming hierarchies for approximating optimal packing densities and ground state

  2. Evaluation of dynamically downscaled extreme temperature using a spatially-aggregated generalized extreme value (GEV) model

    Science.gov (United States)

    Wang, Jiali; Han, Yuefeng; Stein, Michael L.; Kotamarthi, Veerabhadra R.; Huang, Whitney K.

    2016-11-01

    The weather research and forecast (WRF) model downscaling skill in extreme maximum daily temperature is evaluated by using the generalized extreme value (GEV) distribution. While the GEV distribution has been used extensively in climatology and meteorology for estimating probabilities of extreme events, accurately estimating GEV parameters based on data from a single pixel can be difficult, even with fairly long data records. This work proposes a simple method assuming that the shape parameter, the most difficult of the three parameters to estimate, does not vary over a relatively large region. This approach is applied to evaluate 31-year WRF-downscaled extreme maximum temperature through comparison with North American regional reanalysis (NARR) data. Uncertainty in GEV parameter estimates and the statistical significance in the differences of estimates between WRF and NARR are accounted for by conducting a novel bootstrap procedure that makes no assumption of temporal or spatial independence within a year, which is especially important for climate data. Despite certain biases over parts of the United States, overall, WRF shows good agreement with NARR in the spatial pattern and magnitudes of GEV parameter estimates. Both WRF and NARR show a significant increase in extreme maximum temperature over the southern Great Plains and southeastern United States in January and over the western United States in July. The GEV model shows clear benefits from the regionally constant shape parameter assumption, for example, leading to estimates of the location and scale parameters of the model that show coherent spatial patterns.

  3. EDITORIAL HPJ SPECIAL ISSUE INTRODUCTION

    Energy Technology Data Exchange (ETDEWEB)

    Farfan, E.

    2011-10-01

    Radioecology is the study of the fate and transport and potential effects of radionuclides and associated contaminants in the environment. In short, it is the science that describes the fundamental connection between environmental health and human health risks. As such, radioecology can and has provided the credible, consistent and defensible basis for the successful and cost-effective environmental cleanup and closure of nuclear production and waste sites. In addition, radioecology also provides the technical basis for making timely and reliable decisions on cleanup in the aftermath of nuclear incidents such as Chernobyl and Fukushima. The 1986 Chernobyl Nuclear Power Plant (ChNPP) accident resulted in catastrophic health, social, and economic consequences in many countries, predominantly, Ukraine, Belarus, and Russia. The extent of radioactive contamination, levels and forms of contamination, and diversity of the ecosystems affected by the accident did not have any precedent and provided unique opportunities for environmental scientists around the world. Following the natural course of their development, populations of species and their communities found themselves in conditions of chronic radiation exposure that exceeded the natural background by factors of hundreds and thousands. Anything similar would have been extremely difficult if not impossible to recreate in a scientific laboratory. Consequently, since the first few years after the accident, many teams of scientists have visited the Chernobyl Exclusion Zone (ChEZ). The knowledge gained by studying the consequences of this accident has tremendous importance. The concept of an international research and technical center to address the problems involving nuclear and radiological accidents became a reality with the establishment of the International Chernobyl Center (ICC). In May 1995, the US and Ukraine signed a Protocol of Intent on establishment of the ICC, and the government of Ukraine appealed to the

  4. Extreme heat and cultural and linguistic minorities in Australia: perceptions of stakeholders

    Science.gov (United States)

    2014-01-01

    Background Despite acclimatisation to hot weather, many individuals in Australia are adversely affected by extreme heat each summer, placing added pressure on the health sector. In terms of public health, it is therefore important to identify vulnerable groups, particularly in the face of a warming climate. International evidence points to a disparity in heat-susceptibility in certain minority groups, although it is unknown if this occurs in Australia. With cultural diversity increasing, the aim of this study was to explore how migrants from different cultural backgrounds and climate experiences manage periods of extreme heat in Australia. Methods A qualitative study was undertaken across three Australian cities, involving interviews and focus groups with key informants including stakeholders involved in multicultural service provision and community members. Thematic analysis and a framework approach were used to analyse the data. Results Whilst migrants and refugees generally adapt well upon resettlement, there are sociocultural barriers encountered by some that hinder environmental adaptation to periods of extreme heat in Australia. These barriers include socioeconomic disadvantage and poor housing, language barriers to the access of information, isolation, health issues, cultural factors and lack of acclimatisation. Most often mentioned as being at risk were new arrivals, people in new and emerging communities, and older migrants. Conclusions With increasing diversity within populations, it is important that the health sector is aware that during periods of extreme heat there may be disparities in the adaptive capacity of minority groups, underpinned by sociocultural and language-based vulnerabilities in migrants and refugees. These factors need to be considered by policymakers when formulating and disseminating heat health strategies. PMID:24889099

  5. Deformations of extremal toric manifolds

    CERN Document Server

    Rollin, Yann

    2012-01-01

    Let $X$ be a compact toric extremal K\\"ahler manifold. Using the work of Sz\\'ekelyhidi, we provide a simple criterion on the fan describing $X$ to ensure the existence of complex deformations of $X$ that carry extremal metrics. As an example, we find new CSC metrics on 4-points blow-ups of $\\C\\P^1\\times\\C\\P^1$.

  6. Large Extremity Peripheral Nerve Repair

    Science.gov (United States)

    2015-10-01

    IL, Kochevar IE, Redmond RW. Large extremity peripheral nerve repair. Military Health System Research Symposium (MHSRS) Fort Lauderdale, FL. August...some notable discoveries that may impact military health care in the near future. There is a clear need in military medicine to improve outcomes in...membranes or “caul” intact was considered extremely lucky. Children were gifted with life-long happiness , the ability to see spirits, and protection

  7. Observed Statistics of Extreme Waves

    Science.gov (United States)

    2006-12-01

    9 Figure 5. An energy stealing wave as a solution to the NLS equation . (From: Dysthe and...shown that nonlinear interaction between four colliding waves can produce extreme wave behavior. He utilized the NLS equation in his numerical ...2000) demonstrated the formation of extreme waves using the Korteweg de Vries ( KdV ) equation , which is valid in shallow water. It was shown in the

  8. Weather Extremes Around the World

    Science.gov (United States)

    1974-04-01

    or ever has occurred. According to M. A. Arkin, "... record extremes must be taken with a grain of salt .... Ř He explains that news of an extreme...the edge of the Danakil Depression, a salt desert. By averaging the annual mean daily maximum temperature of 106°F36 atid the annual mean daily...increased by orographic lifting.1" Asa result of these monsoon disturbances, which are still not fully understood, the eastern Himalayan 105 106

  9. Why is Astronomy Important?

    CERN Document Server

    Rosenberg, Marissa; Bladon, Georgia; Christensen, Lars Lindberg

    2013-01-01

    For a long time astronomers and other scientists believed that the importance of their work was evident to society. But in these difficult days of financial austerity, even the most obvious benefits of science have to undergo careful scrutiny. Eradicating poverty and hunger is a worldwide priority, and activities that do not directly attempt to resolve these issues can be hard to justify and support. However, several studies have told us that investing in science education, research and technology provides a great return (not only economically, but culturally and indirectly for the population in general and has helped countries to face and overcome crises. The scientific and technological development of a country or region is closely linked to its human development index) a statistic that is a measure of life expectancy, education and income.

  10. Extreme Energy in China

    Energy Technology Data Exchange (ETDEWEB)

    Khanna, Nina [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fridley, David [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Cai, Lixue [China Petrochemical Corporations (China)

    2013-06-01

    Over the last decade, China has focused its policies simultaneously on moderating the rapid energy demand growth that has been driven by three decades of rapid economic growth and industrialization and on increasing its energy supply. In spite of these concerted efforts, however, China continues to face growing energy supply challenges, particularly with accelerating demand for oil and natural gas, both of which are now heavily dependent on imports. On the supply side, the recent 11th and 12th Five-Year Plans have emphasized accelerating conventional and nonconventional oil and gas exploration and development through pricing reforms, pipeline infrastructure expansions and 2015 production targets for shale gas and coal seam methane. This study will analyze China’s new and nonconventional oil and gas resources base, possible development paths and outlook, and the potential role for these nonconventional resources in meeting oil and gas demand. The nonconventional resources currently being considered by China and included in this study include: shale gas, coal seam methane (coal mine methane and coal bed methane), tight gas, in-situ coal gasification, tight oil and oil shale, and gas hydrates.

  11. Extremely Severe Space Weather and Geomagnetically Induced Currents in Regions with Locally Heterogeneous Ground Resistivity

    Science.gov (United States)

    Fujita, Shigeru; Kataoka, Ryuho; Pulkkinen, Antti; Watari, Shinichi

    2016-01-01

    Large geomagnetically induced currents (GICs) triggered by extreme space weather events are now regarded as one of the serious natural threats to the modern electrified society. The risk is described in detail in High-Impact, Low-Frequency Event Risk, A Jointly-Commissioned Summary Report of the North American Electric Reliability Corporation and the US Department of Energy's November 2009 Workshop, June 2010. For example, the March 13-14,1989 storm caused a large-scale blackout affecting about 6 million people in Quebec, Canada, and resulting in substantial economic losses in Canada and the USA (Bolduc 2002). Therefore, European and North American nations have invested in GIC research such as the Solar Shield project in the USA (Pulkkinen et al. 2009, 2015a). In 2015, the Japanese government (Ministry of Economy, Trade and Industry, METI) acknowledged the importance of GIC research in Japan. After reviewing the serious damages caused by the 2011 Tohoku-Oki earthquake, METI recognized the potential risk to the electric power grid posed by extreme space weather. During extreme events, GICs can be concerning even in mid- and low-latitude countries and have become a global issue.

  12. Enduring Issues In Educational Assessment

    Science.gov (United States)

    Della-Piana, Gabriel M.

    2008-01-01

    Assessments were an important tool recommended by "A Nation at Risk;" however, a generation after that report, many of the problems with student assessment still remain. This article offers brief reflections on three somewhat overlapping but enduring issues in educational assessment: validity, construct underrepresentation in outcome measures in…

  13. Writing: Importance, Development, and Instruction

    Science.gov (United States)

    Graham, Steve; Gillespie, Amy; McKeown, Debra

    2013-01-01

    In this article, we examine why writing is important, how it develops, and effective writing practices. We situate the 5 articles in this special issue of "Reading and Writing" in this literature, providing a context for the contribution of each paper.

  14. Writing: Importance, Development, and Instruction

    Science.gov (United States)

    Graham, Steve; Gillespie, Amy; McKeown, Debra

    2013-01-01

    In this article, we examine why writing is important, how it develops, and effective writing practices. We situate the 5 articles in this special issue of "Reading and Writing" in this literature, providing a context for the contribution of each paper.

  15. Can we colonize the solar system? Human biology and survival in the extreme space environment.

    Science.gov (United States)

    Launius, Roger D

    2010-09-01

    Throughout the history of the space age the dominant vision for the future has been great spaceships plying the solar system, and perhaps beyond, moving living beings from one planet to another. Spacesuited astronauts would carry out exploration, colonization, and settlement as part of a relentlessly forward looking movement of humanity beyond Earth. As time has progressed this image has not changed appreciably even as the full magnitude of the challenges it represents have become more and more apparent. This essay explores the issues associated with the human movement beyond Earth and raises questions about whether humanity will ever be able to survive in the extreme environment of space and the other bodies of the solar system. This paper deals with important historical episodes as well as wider conceptual issues about life in space. Two models of expansion beyond Earth are discussed: (1) the movement of microbes and other types of life on Earth that can survive the space environment and (2) the modification of humans into cyborgs for greater capability to survive in the extreme environments encountered beyond this planet.

  16. Extremely halophilic archaea from ancient salt sediments and their long term survival.

    Science.gov (United States)

    Stan-Lotter, Helga; Fendrihan, Sergiu; Dornmayr-Pfaffenhuemer, Marion

    Halophilic archaebacteria (haloarchaea) thrive in environments with salt concentrations approaching saturation, such as natural brines, marine solar salterns and alkaline salt lakes; they have also been isolated from rock salt of great geological age (195-250 million years) and some of those strains were described as novel species (1). The cells survived perhaps while being enclosed within small fluid inclusions in the halite. When simulating the embedding process of haloarchaea in laboratory-grown salt crystals, cells accumulated preferentially in fluid inclusions, as could be demonstrated by pre-staining with fluorescent dyes. The issue of extreme long term microbial survival in rock salt has considerable implications for the search for extraterrestrial life. Halite has been found in Martian meteorites, salts are present on the Martian surface and there is good evidence for a salty ocean on the Jovian moon Europa. Therefore the search for halophilic prokaryotic life in such environments appears plausible. The development of detection methods for subsurface haloarchaea, which might also be applicable to samples from future missions to space, is important and some examples such as fluorescence microscopy methods with novel dyes will be described. (1) Fendrihan, S., Legat, A., Gruber, C., Pfaffenhuemer, M., Weidler, G., Gerbl, F., Stan- Lotter, H. (2006) Extremely halophilic archaea and the issue of long term microbial survival. Reviews in Environmental Science and Bio/technology 5, 1569-1605.

  17. Special Issue: War, violence and masculinities

    DEFF Research Database (Denmark)

    2015-01-01

    This special double issue of NORMA explore the mutual influences between violence, war and masculinities, the forms these have taken in different social and cultural contexts and the implications for masculinity research. The issues cover a range of historical and current topics, cases and analyt......This special double issue of NORMA explore the mutual influences between violence, war and masculinities, the forms these have taken in different social and cultural contexts and the implications for masculinity research. The issues cover a range of historical and current topics, cases...... and analytical approaches. The contributions fall into the following four themes: violent masculine rituals and how contemporary societies cope with extreme violence against women; popular written and visual fiction about war and masculine rationalities; gender relations in social movements of rebellions...

  18. Report from the 4th Workshop on Extremely Large Databases

    Directory of Open Access Journals (Sweden)

    Jacek Becla

    2011-02-01

    Full Text Available Academic and industrial users are increasingly facing the challenge of petabytes of data, but managing and analyzing such large data sets still remains a daunting task. The 4th Extremely Large Databases workshop was organized to examine the needs of communities under-represented at the past workshops facing these issues. Approaches to big data statistical analytics as well as emerging opportunities related to emerging hardware technologies were also debated. Writable extreme scale databases and the science benchmark were discussed. This paper is the final report of the discussions and activities at this workshop.

  19. Perspectives on Extremes as a Climate Scientist and Farmer

    Science.gov (United States)

    Grotjahn, R.

    2016-12-01

    The speaker is both a climate scientist whose research emphasizes climate extremes and a small farmer in the most agriculturally productive region in the world. He will share some perspectives about the future of extremes over the United States as they relate to farming. General information will be drawn from the National Climate Assessment (NCA) published in 2014. Different weather-related quantities are useful for different commodities. While plant and animal production are time-integrative, extreme events can cause lasting harm long after the event is over. Animal production, including dairy, is sensitive to combinations of high heat and humidity; lasting impacts include suspended milk production, aborted fetuses, and increased mortality. The rice crop can be devastated by the wrong combination of wind and humidity just before harvest time. Extremes at the bud break, flowering, and nascent fruit stage and greatly reduce the fruit production for the year in tree crops. Saturated soils from heavy rainfall cause major losses to some crops (for example, by fostering pathogen growth), harm water delivery systems, and disrupt timing of field activities (primarily harvest).After an overview of some general issues relating to Agriculture, some extreme weather impacts on specific commodities (primarily dairy and specialty crops, some grains) will be highlighted including quantities relevant to agriculture. Example extreme events economic impacts will be summarized. If there is interest, issues related to water availability and management will be described. Projected extreme event changes over the US will be discussed. Some conclusions will be drawn about: future impacts and possible changes to farming (some are already occurring). Perspectives will be given on including the diverse range of quantities useful to agriculture when developing climate models. As time permits, some personal experiences with climate change and discussing it with fellow farmers will be shared.

  20. Abrupt shifts in ecosystem function and intensification of global biogeochemical cycle driven by hydroclimatic extremes

    Science.gov (United States)

    Ma, Xuanlong; Huete, Alfredo; Ponce-Campos, Guillermo; Zhang, Yongguang; Xie, Zunyi; Giovannini, Leandro; Cleverly, James; Eamus, Derek

    2016-04-01

    Amplification of the hydrologic cycle as a consequence of global warming is increasing the frequency, intensity, and spatial extent of extreme climate events globally. The potential influences resulting from amplification of the hydro-climatic cycle, coupled with an accelerating warming trend, pose great concerns on the sustainability of terrestrial ecosystems to sequester carbon, maintain biodiversity, provide ecosystem services, food security, and support human livelihood. Despite the great implications, the magnitude, direction, and carry-over effect of these extreme climate events on ecosystem function, remain largely uncertain. To address these pressing issues, we conducted an observational, interdisciplinary study using satellite retrievals of atmospheric CO2 and photosynthesis (chlorophyll fluorescence), and in-situ flux tower measures of ecosystem-atmosphere carbon exchange, to reveal the shifts in ecosystem function across extreme drought and wet periods. We further determine the factors that govern ecosystem sensitivity to hydroclimatic extremes. We focus on Australia but extended our analyses to other global dryland regions due to their significant role in global biogeochemical cycles. Our results revealed dramatic impacts of drought and wet hydroclimatic extremes on ecosystem function, with abrupt changes in vegetation productivity, carbon uptake, and water-use-efficiency between years. Drought resulted in widespread reductions or collapse in the normal patterns of vegetation growth seasonality such that in many cases there was no detectable phenological cycle during extreme drought years. We further identified a significant increasing trend (p global regions, resulting in an increasing trend in magnitude of the episodic carbon sink pulses coupled to each La Niña-induced wet years. This finding is of global biogeochemical significance, with the consequence of amplifying the global carbon cycle. Lastly, we use landscape measurements of carbon and water

  1. Assessment of a climate model to reproduce rainfall variability and extremes over Southern Africa

    Science.gov (United States)

    Williams, C. J. R.; Kniveton, D. R.; Layberry, R.

    2010-01-01

    It is increasingly accepted that any possible climate change will not only have an influence on mean climate but may also significantly alter climatic variability. A change in the distribution and magnitude of extreme rainfall events (associated with changing variability), such as droughts or flooding, may have a far greater impact on human and natural systems than a changing mean. This issue is of particular importance for environmentally vulnerable regions such as southern Africa. The sub-continent is considered especially vulnerable to and ill-equipped (in terms of adaptation) for extreme events, due to a number of factors including extensive poverty, famine, disease and political instability. Rainfall variability and the identification of rainfall extremes is a function of scale, so high spatial and temporal resolution data are preferred to identify extreme events and accurately predict future variability. The majority of previous climate model verification studies have compared model output with observational data at monthly timescales. In this research, the assessment of ability of a state of the art climate model to simulate climate at daily timescales is carried out using satellite-derived rainfall data from the Microwave Infrared Rainfall Algorithm (MIRA). This dataset covers the period from 1993 to 2002 and the whole of southern Africa at a spatial resolution of 0.1° longitude/latitude. This paper concentrates primarily on the ability of the model to simulate the spatial and temporal patterns of present-day rainfall variability over southern Africa and is not intended to discuss possible future changes in climate as these have been documented elsewhere. Simulations of current climate from the UK Meteorological Office Hadley Centre's climate model, in both regional and global mode, are firstly compared to the MIRA dataset at daily timescales. Secondly, the ability of the model to reproduce daily rainfall extremes is assessed, again by a comparison with

  2. Evidence on public policy: methodological issues, political issues and examples.

    Science.gov (United States)

    Attanasio, Orazio P

    2014-03-01

    In this paper I discuss how evidence on public policy is generated and in particular the issue of evaluation of public policies. In economics, the issue of attribution and the identification of causal links has recently received considerable attention. Important methodological issues have been tackled and new techniques have been proposed and used. Randomized Control Trials have become some sort of gold standard. However, they are not exempt from problems and have important limitations: in some case they cannot be constructed and, more generally, problems of external validity and transferability of results can be important. The paper then moves on to discuss the political economy of policy evaluations for policy evaluations to have an impact for the conduct of actual policy, it is important that the demand for evaluation comes directly from the policy making process and is generated endogenously within it. In this sense it is important that the institutional design of policy making is such that policy making institutions are incentivized to use rigorous evaluation in the process of designing policies and allocating resources to alternative options. Economists are currently involved in the design and evaluation of many policies, including policies about health, nutrition and education. The role they can play in these fields is not completely obvious. The paper argues that their main contribution is in the modelling of how individual reacts to incentives (including those provided by public policies).

  3. Extreme weather caused by concurrent cyclone, front and thunderstorm occurrences

    Science.gov (United States)

    Dowdy, Andrew J.; Catto, Jennifer L.

    2017-01-01

    Phenomena such as cyclones, fronts and thunderstorms can cause extreme weather in various regions throughout the world. Although these phenomena have been examined in numerous studies, they have not all been systematically examined in combination with each other, including in relation to extreme precipitation and extreme winds throughout the world. Consequently, the combined influence of these phenomena represents a substantial gap in the current understanding of the causes of extreme weather events. Here we present a systematic analysis of cyclones, fronts and thunderstorms in combination with each other, as represented by seven different types of storm combinations. Our results highlight the storm combinations that most frequently cause extreme weather in various regions of the world. The highest risk of extreme precipitation and extreme wind speeds is found to be associated with a triple storm type characterized by concurrent cyclone, front and thunderstorm occurrences. Our findings reveal new insight on the relationships between cyclones, fronts and thunderstorms and clearly demonstrate the importance of concurrent phenomena in causing extreme weather.

  4. Editorial of the Special Issue Antimicrobial Polymers

    Directory of Open Access Journals (Sweden)

    Iolanda Francolini

    2013-09-01

    Full Text Available The special issue “Antimicrobial Polymers” includes research and review papers concerning the recent advances on preparation of antimicrobial polymers and their relevance to industrial settings and biomedical field. Antimicrobial polymers have recently emerged as promising candidates to fight microbial contamination onto surfaces thanks to their interesting properties. In this special issue, the main strategies pursued for developing antimicrobial polymers, including polymer impregnation with antimicrobial agents or synthesis of polymers bearing antimicrobial moieties, were discussed. The future application of these polymers either in industrial or healthcare settings could result in an extremely positive impact not only at the economic level but also for the improvement of quality of life.

  5. TOWARD A FRAMEWORK UNDERSTANDING OF ONLINE PROGRAMS FOR COUNTERING VIOLENT EXTREMISM

    Directory of Open Access Journals (Sweden)

    Garth Davies

    2016-03-01

    Full Text Available There is an emerging consensus that ideologically-based narratives play a central role in encouraging and sustaining radicalization to violence, and that preventing, arresting, or reversing radicalization requires some means by which to address the effects of these narratives. Countering violent extremism (CVE is a broad umbrella phrase that covers a wide array of approaches that have been advanced to reduce the radicalizing effects of extremist narratives. There is considerably less agreement, however, regarding the most appropriate means by which the mitigation of extremist narratives might best be accomplished. An important emerging area of interest is the role of the Internet, both as a forum through which narratives are transmitted and as an avenue for delivering CVE programs. At present, very little is known about which principles and practices should inform online CVE initiatives. This study attempts to establish a foundation and framework for these programs: first, by identifying the concepts and constructs which may be most relevant to countering violent extremism online, and second, by examining the available material from six online CVE programs in relation to these concepts. This examination suggests that these programs are lacking strong theoretical foundations and do not address important elements of radicalization, such as contextual factors or identity issues. It is important that future iterations of CVE programs consider not just the specific content of the narratives, but also take into account why these narratives have resonance for particular individuals.

  6. Sleep Issues and Sundowning

    Science.gov (United States)

    ... We will not sell or share your name. Sleep Issues and Sundowning Tweet Bookmark this page | Email | ... Sleep Changes Back to top Coping strategies for sleep issues and sundowning If the person is awake ...

  7. Compound extremes in a changing climate - a Markov chain approach

    Science.gov (United States)

    Sedlmeier, Katrin; Mieruch, Sebastian; Schädler, Gerd; Kottmeier, Christoph

    2016-11-01

    Studies using climate models and observed trends indicate that extreme weather has changed and may continue to change in the future. The potential impact of extreme events such as heat waves or droughts depends not only on their number of occurrences but also on "how these extremes occur", i.e., the interplay and succession of the events. These quantities are quite unexplored, for past changes as well as for future changes and call for sophisticated methods of analysis. To address this issue, we use Markov chains for the analysis of the dynamics and succession of multivariate or compound extreme events. We apply the method to observational data (1951-2010) and an ensemble of regional climate simulations for central Europe (1971-2000, 2021-2050) for two types of compound extremes, heavy precipitation and cold in winter and hot and dry days in summer. We identify three regions in Europe, which turned out to be likely susceptible to a future change in the succession of heavy precipitation and cold in winter, including a region in southwestern France, northern Germany and in Russia around Moscow. A change in the succession of hot and dry days in summer can be expected for regions in Spain and Bulgaria. The susceptibility to a dynamic change of hot and dry extremes in the Russian region will probably decrease.

  8. Augmented kludge waveforms for detecting extreme-mass-ratio inspirals

    Science.gov (United States)

    Chua, Alvin J. K.; Moore, Christopher J.; Gair, Jonathan R.

    2017-08-01

    The extreme-mass-ratio inspirals (EMRIs) of stellar-mass compact objects into massive black holes are an important class of source for the future space-based gravitational-wave detector LISA. Detecting signals from EMRIs will require waveform models that are both accurate and computationally efficient. In this paper, we present the latest implementation of an augmented analytic kludge (AAK) model, publicly available at https://github.com/alvincjk/EMRI_Kludge_Suite as part of an EMRI waveform software suite. This version of the AAK model has improved accuracy compared to its predecessors, with two-month waveform overlaps against a more accurate fiducial model exceeding 0.97 for a generic range of sources; it also generates waveforms 5-15 times faster than the fiducial model. The AAK model is well suited for scoping out data analysis issues in the upcoming round of mock LISA data challenges. A simple analytic argument shows that it might even be viable for detecting EMRIs with LISA through a semicoherent template bank method, while the use of the original analytic kludge in the same approach will result in around 90% fewer detections.

  9. Assessing Climate Variability using Extreme Rainfall and ...

    African Journals Online (AJOL)

    user1

    As noted by the Bureau of Meteorology, Canada, to examine whether such ... their local climate, a threshold considered extreme in one part of Australia could be ... (extreme frequency); the average intensity of rainfall from extreme events.

  10. Control challenges for extremely large telescopes

    Science.gov (United States)

    MacMartin, Douglas G.

    2003-08-01

    The next generation of large ground-based optical telescopes are likely to involve a highly segmented primary mirror that must be controlled in the presence of wind and other disturbances, resulting in a new set of challenges for control. The current design concept for the California Extremely Large Telescope (CELT) includes 1080 segments in the primary mirror, with the out-of-plane degrees of freedom actively controlled. In addition to the 3240 primary mirror actuators, the secondary mirror of the telescope will also require at least 5 degree of freedom control. The bandwidth of both control systems will be limited by coupling to structural modes. I discuss three control issues for extremely large telescopes in the context of the CELT design, describing both the status and remaining challenges. First, with many actuators and sensors, the cost and reliability of the control hardware is critical; the hardware requirements and current actuator design are discussed. Second, wind buffeting due to turbulence inside the telescope enclosure is likely to drive the control bandwidth higher, and hence limitations resulting from control-structure-interaction must be understood. Finally, the impact on the control architecture is briefly discussed.

  11. On the Limit Distribution of Lower Extreme Generalized Order Statistics

    Indian Academy of Sciences (India)

    H M Barakat; Magdy E El-Adll

    2012-05-01

    In a wide subclass of generalized order statistics $(gOs)$, which contains most of the known and important models of ordered random variables, weak convergence of lower extremes are developed. A recent result of extreme value theory of $m-gOs$ (as well as the classical extreme value theory of ordinary order statistics) yields three types of limit distributions that are possible in case of linear normalization. In this paper a similar classification of limit distributions holds for extreme $gOs$, where the parameters $_j,j=1,\\ldots,n$, are assumed to be pairwise different. Two illustrative examples are given to demonstrate the practical importance for some of the obtained results.

  12. Rising Precipitation Extremes across Nepal

    Directory of Open Access Journals (Sweden)

    Ramchandra Karki

    2017-01-01

    Full Text Available As a mountainous country, Nepal is most susceptible to precipitation extremes and related hazards, including severe floods, landslides and droughts that cause huge losses of life and property, impact the Himalayan environment, and hinder the socioeconomic development of the country. Given that the countrywide assessment of such extremes is still lacking, we present a comprehensive picture of prevailing precipitation extremes observed across Nepal. First, we present the spatial distribution of daily extreme precipitation indices as defined by the Expert Team on Climate Change Detection, Monitoring and Indices (ETCCDMI from 210 stations over the period of 1981–2010. Then, we analyze the temporal changes in the computed extremes from 76 stations, featuring long-term continuous records for the period of 1970–2012, by applying a non-parametric Mann−Kendall test to identify the existence of a trend and Sen’s slope method to calculate the true magnitude of this trend. Further, the local trends in precipitation extremes have been tested for their field significance over the distinct physio-geographical regions of Nepal, such as the lowlands, middle mountains and hills and high mountains in the west (WL, WM and WH, respectively, and likewise, in central (CL, CM and CH and eastern (EL, EM and EH Nepal. Our results suggest that the spatial patterns of high-intensity precipitation extremes are quite different to that of annual or monsoonal precipitation. Lowlands (Terai and Siwaliks that feature relatively low precipitation and less wet days (rainy days are exposed to high-intensity precipitation extremes. Our trend analysis suggests that the pre-monsoonal precipitation is significantly increasing over the lowlands and CH, while monsoonal precipitation is increasing in WM and CH and decreasing in CM, CL and EL. On the other hand, post-monsoonal precipitation is significantly decreasing across all of Nepal while winter precipitation is decreasing

  13. Analytic results for oscillatory systems with extremal dynamic properties

    Directory of Open Access Journals (Sweden)

    Górecki Henryk

    2014-12-01

    Full Text Available The maximal value of the error is the most important criterion in system design. It is also the most difficult one. For that reason there exist many other criteria. The extreme value of the error represents the attainable accuracy which can be obtained and the corresponding extreme time gives information about how fast the transients are. The extreme values of the error and the corresponding time are treated here as functions of the roots of the characteristic equation. The proposed analytical formulae allow designing systems with prescribed dynamic properties.

  14. Reproductive issues in anorexia nervosa

    Science.gov (United States)

    Hoffman, Elizabeth R; Zerwas, Stephanie C; Bulik, Cynthia M

    2011-01-01

    Despite a high prevalence of menstrual irregularities, women with anorexia nervosa are becoming pregnant. The physical and psychological demands of pregnancy and motherhood can represent an immense challenge for women already struggling with the medical and psychological stress of an eating disorder. This article summarizes key issues related to reproduction in women with anorexia nervosa, highlighting the importance of preconception counseling, adequate gestational weight gain, and sufficient pre- and post-natal nutrition. Postpartum issues including eating disorder symptom relapse, weight loss, breastfeeding, and risk of perinatal depression and anxiety are also discussed. PMID:22003362

  15. Current management of the mangled upper extremity.

    Science.gov (United States)

    Bumbasirevic, Marko; Stevanovic, Milan; Lesic, Aleksandar; Atkinson, Henry D E

    2012-11-01

    Mangled describes an injury caused by cutting, tearing, or crushing, which leads to the limb becoming unrecognizable; in essence, there are two treatment options for mangled upper extremities, amputation and salvage reconstruction. With advances in our understanding of human physiology and basic science, and with the development of new fixation devices, modern microsurgical techniques and the possibility of different types of bony and soft tissue reconstruction, the clinical and functional outcomes are often good, and certainly preferable to those of contemporary prosthetics. Early or even immediate (emergency) complete upper extremity reconstruction appears to give better results than delayed or late reconstruction and should be the treatment of choice where possible. Before any reconstruction is attempted, injuries to other organs must be excluded. Each step in the assessment and treatment of a mangled extremity is of utmost importance. These include radical tissue debridement, prophylactic antibiotics, copious irrigation with a lavage system, stable bone fixation, revascularization, nerve repair, and soft tissue coverage. Well-planned and early rehabilitation leads to a better functional outcome. Despite the use of scoring systems to help guide decisions and predict outcomes, the decision to reconstruct or to amputate still ultimately lies with the surgical judgment and experience of the treating surgeon.

  16. Risk-based water resources planning: Coupling water allocation and water quality management under extreme droughts

    Science.gov (United States)

    Mortazavi-Naeini, M.; Bussi, G.; Hall, J. W.; Whitehead, P. G.

    2016-12-01

    The main aim of water companies is to have a reliable and safe water supply system. To fulfil their duty the water companies have to consider both water quality and quantity issues and challenges. Climate change and population growth will have an impact on water resources both in terms of available water and river water quality. Traditionally, a distinct separation between water quality and abstraction has existed. However, water quality can be a bottleneck in a system since water treatment works can only treat water if it meets certain standards. For instance, high turbidity and large phytoplankton content can increase sharply the cost of treatment or even make river water unfit for human consumption purposes. It is vital for water companies to be able to characterise the quantity and quality of water under extreme weather events and to consider the occurrence of eventual periods when water abstraction has to cease due to water quality constraints. This will give them opportunity to decide on water resource planning and potential changes to reduce the system failure risk. We present a risk-based approach for incorporating extreme events, based on future climate change scenarios from a large ensemble of climate model realisations, into integrated water resources model through combined use of water allocation (WATHNET) and water quality (INCA) models. The annual frequency of imposed restrictions on demand is considered as measure of reliability. We tested our approach on Thames region, in the UK, with 100 extreme events. The results show increase in frequency of imposed restrictions when water quality constraints were considered. This indicates importance of considering water quality issues in drought management plans.

  17. Functional metagenomics of extreme environments.

    Science.gov (United States)

    Mirete, Salvador; Morgante, Verónica; González-Pastor, José Eduardo

    2016-04-01

    The bioprospecting of enzymes that operate under extreme conditions is of particular interest for many biotechnological and industrial processes. Nevertheless, there is a considerable limitation to retrieve novel enzymes as only a small fraction of microorganisms derived from extreme environments can be cultured under standard laboratory conditions. Functional metagenomics has the advantage of not requiring the cultivation of microorganisms or previous sequence information to known genes, thus representing a valuable approach for mining enzymes with new features. In this review, we summarize studies showing how functional metagenomics was employed to retrieve genes encoding for proteins involved not only in molecular adaptation and resistance to extreme environmental conditions but also in other enzymatic activities of biotechnological interest.

  18. Mitochondriogenesis genes and extreme longevity.

    Science.gov (United States)

    Santiago, Catalina; Garatachea, Nuria; Yvert, Thomas; Rodríguez-Romo, Gabriel; Santos-Lozano, Alejandro; Fiuza-Luces, Carmen; Lucia, Alejandro

    2013-02-01

    Genes of the proliferator-activated receptor delta (PPARD)-peroxisome proliferator-activated receptor γ coactivator 1α (PPARGC1A, also termed PGC1-α)-nuclear respiratory factor (NRF)-mitochondrial transcription Factor A (TFAM) mitochondriogenesis pathway can influence health/disease phenotypes, yet their association with extreme longevity is not known. We studied the association of five common polymorphisms in genes of this pathway (rs2267668, rs8192678, rs6949152, rs12594956, rs1937) and extreme longevity using a case (107 centenarians)-control (284 young adults) design. We found no between-group differences in allele/genotype frequencies, except for CC genotype in rs1937 (p=0.003), with no representation in controls (0%), versus 2.8% in centenarians (2 men, 1 woman). In summary, the studied genetic variants of the PPARD-PPARGC1A-NRF-TFAM pathway were not associated with extreme longevity, yet a marginal association could exist for rs1937.

  19. Tax Adjusted for Imported Equipment

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    @@ Ministry of Finance, Central Administration of Customs, and State Administration of Taxation of P.R. of China jointly issued a "Notice on the Lists Related to the Interim Provisions on the Adjustment of Import Tax Policy on Major Technical Equipment" (the Notice) on April 13rd to adjust the list of equipment catalog and merchandise attached to the "Interim Provisions on the Import Tax Policy on Major Technical Equipment", as well as the preferential scope and extent of the import tax on a number of major technical equipment.

  20. Extreme Conditions Modeling Workshop Report

    Energy Technology Data Exchange (ETDEWEB)

    Coe, R. G.; Neary, V. S.; Lawson, M. J.; Yu, Y.; Weber, J.

    2014-07-01

    Sandia National Laboratories (SNL) and the National Renewable Energy Laboratory (NREL) hosted the Wave Energy Converter (WEC) Extreme Conditions Modeling (ECM) Workshop in Albuquerque, NM on May 13th-14th, 2014. The objective of the workshop was to review the current state of knowledge on how to model WECs in extreme conditions (e.g. hurricanes and other large storms) and to suggest how U.S. Department of Energy (DOE) and national laboratory resources could be used to improve ECM methods for the benefit of the wave energy industry.

  1. Automation Rover for Extreme Environments

    Science.gov (United States)

    Sauder, Jonathan; Hilgemann, Evan; Johnson, Michael; Parness, Aaron; Hall, Jeffrey; Kawata, Jessie; Stack, Kathryn

    2017-01-01

    Almost 2,300 years ago the ancient Greeks built the Antikythera automaton. This purely mechanical computer accurately predicted past and future astronomical events long before electronics existed1. Automata have been credibly used for hundreds of years as computers, art pieces, and clocks. However, in the past several decades automata have become less popular as the capabilities of electronics increased, leaving them an unexplored solution for robotic spacecraft. The Automaton Rover for Extreme Environments (AREE) proposes an exciting paradigm shift from electronics to a fully mechanical system, enabling longitudinal exploration of the most extreme environments within the solar system.

  2. Extreme Weather and Natural Disasters

    CERN Document Server

    Healey, Justin

    2012-01-01

    Australia is a vast land in which weather varies significantly in different parts of the continent. Recent extreme weather events in Australia, such as the Queensland floods and Victorian bushfires, are brutal reminders of nature's devastating power. Is global warming increasing the rate of natural disasters? What part do La Niña and El Niño play in the extreme weather cycle? Cyclones, floods, severe storms, bushfires, landslides, earthquakes, tsunamis - what are the natural and man-made causes of these phenomena, how predictable are they, and how prepared are we for the impacts of natural dis

  3. Uncommon upper extremity compression neuropathies.

    Science.gov (United States)

    Knutsen, Elisa J; Calfee, Ryan P

    2013-08-01

    Hand surgeons routinely treat carpal and cubital tunnel syndromes, which are the most common upper extremity nerve compression syndromes. However, more infrequent nerve compression syndromes of the upper extremity may be encountered. Because they are unusual, the diagnosis of these nerve compression syndromes is often missed or delayed. This article reviews the causes, proposed treatments, and surgical outcomes for syndromes involving compression of the posterior interosseous nerve, the superficial branch of the radial nerve, the ulnar nerve at the wrist, and the median nerve proximal to the wrist. Copyright © 2013 Elsevier Inc. All rights reserved.

  4. Magnetic Reconnection in Extreme Astrophysical Environments

    CERN Document Server

    Uzdensky, Dmitri A

    2011-01-01

    Magnetic reconnection is a basic plasma process of dramatic rearrangement of magnetic topology, often leading to a violent release of magnetic energy. It is important in magnetic fusion and in space and solar physics --- areas that have so far provided the context for most of reconnection research. Importantly, these environments consist just of electrons and ions and the dissipated energy always stays with the plasma. In contrast, in this paper I introduce a new direction of research, motivated by several important problems in high-energy astrophysics --- reconnection in high energy density (HED) radiative plasmas, where radiation pressure and radiative cooling become dominant factors in the pressure and energy balance. I identify the key processes distinguishing HED reconnection: special-relativistic effects; radiative effects (radiative cooling, radiation pressure, and Compton resistivity); and, at the most extreme end, QED effects, including pair creation. I then discuss the main astrophysical application...

  5. A comparative assessment of statistical methods for extreme weather analysis

    Science.gov (United States)

    Schlögl, Matthias; Laaha, Gregor

    2017-04-01

    Extreme weather exposure assessment is of major importance for scientists and practitioners alike. We compare different extreme value approaches and fitting methods with respect to their value for assessing extreme precipitation and temperature impacts. Based on an Austrian data set from 25 meteorological stations representing diverse meteorological conditions, we assess the added value of partial duration series over the standardly used annual maxima series in order to give recommendations for performing extreme value statistics of meteorological hazards. Results show the merits of the robust L-moment estimation, which yielded better results than maximum likelihood estimation in 62 % of all cases. At the same time, results question the general assumption of the threshold excess approach (employing partial duration series, PDS) being superior to the block maxima approach (employing annual maxima series, AMS) due to information gain. For low return periods (non-extreme events) the PDS approach tends to overestimate return levels as compared to the AMS approach, whereas an opposite behavior was found for high return levels (extreme events). In extreme cases, an inappropriate threshold was shown to lead to considerable biases that may outperform the possible gain of information from including additional extreme events by far. This effect was neither visible from the square-root criterion, nor from standardly used graphical diagnosis (mean residual life plot), but from a direct comparison of AMS and PDS in synoptic quantile plots. We therefore recommend performing AMS and PDS approaches simultaneously in order to select the best suited approach. This will make the analyses more robust, in cases where threshold selection and dependency introduces biases to the PDS approach, but also in cases where the AMS contains non-extreme events that may introduce similar biases. For assessing the performance of extreme events we recommend conditional performance measures that focus

  6. Representing Extreme Temperature Events and Resolving Their Implications for Yield

    Science.gov (United States)

    Huybers, P. J.; Mueller, N. D.; Butler, E. E.; Tingley, M.; McKinnon, K. A.; Rhines, A. N.

    2014-12-01

    Although it is well recognized that extreme temperatures occurring at particular growth stages are destructive to yield, there appears substantial scope for improved empirical assessment and simulation of the relationship between temperature and yield. Several anecdotes are discussed. First, a statistical analysis of historical U.S. extreme temperatures is provided. It is demonstrated that both reanalysis and model simulations significantly differ from near-surface temperature observations in the frequency and magnitude of extremes. This finding supports empirical assessment using near-surface instrumental records and underscores present difficulties in simulating past and predicting future changes. Second, an analysis of the implications of extreme temperatures on U.S. maize yield is provided where the response is resolved regionally and according to growth stage. Sensitivity to extreme temperatures during silking is found to be uniformly high across the U.S., but the response during grain filling varies spatially, with higher sensitivity in the North. This regional and growth-stage dependent sensitivity implies the importance of representing cultivar, planting times, and development rates, and is also indicative of the potential for future changes according to the combined effects of climate and technology. Finally, interaction between extreme temperatures and agriculture is indicated by analysis showing that historical extreme temperatures in the U.S. Midwest have cooled in relation to changes in regional productivity, possibly because of greater potential for cooling through evapotranspiration. This interpretation is consistent with changes in crop physiology and management, though also noteworthy is that the moderating influence of increased evapotranspiration on extreme temperatures appears to be lost during severe drought. Together, these findings indicate that a more accurate assessment of the historical relationship between extreme temperatures and yield

  7. General Resilience to Cope with Extreme Events

    Directory of Open Access Journals (Sweden)

    Brian Walker

    2012-11-01

    Full Text Available Resilience to specified kinds of disasters is an active area of research and practice. However, rare or unprecedented disturbances that are unusually intense or extensive require a more broad-spectrum type of resilience. General resilience is the capacity of social-ecological systems to adapt or transform in response to unfamiliar, unexpected and extreme shocks. Conditions that enable general resilience include diversity, modularity, openness, reserves, feedbacks, nestedness, monitoring, leadership, and trust. Processes for building general resilience are an emerging and crucially important area of research.

  8. Properties of Extreme Poin Rainfall II

    DEFF Research Database (Denmark)

    Mikkelsen, Peter Steen; Harremoës, Poul; Rosbjerg, Dan

    1995-01-01

    As an alternative to the traditional non-parametric method the partial duration series approach with exponentially distributed exceedances is used to model extreme values of depth and maximum 10 min intensity per rainfall event, measured at gauges placed at different locations in Denmark....... A statistically significant regional variation is documented and shown to be of importance to engineering application. The apparent variability is divided into sampling uncertainty and uncertainty caused by true regional variability. Further, a method for assessing the total inherent design uncertainty, taking...

  9. Extreme Physics and Informational/Computational Limits

    Energy Technology Data Exchange (ETDEWEB)

    Di Sia, Paolo, E-mail: paolo.disia@univr.it, E-mail: 10alla33@virgilio.it [Department of Computer Science, Faculty of Science, Verona University, Strada Le Grazie 15, I-37134 Verona (Italy) and Faculty of Computer Science, Free University of Bozen, Piazza Domenicani 3, I-39100 Bozen-Bolzano (Italy)

    2011-07-08

    A sector of the current theoretical physics, even called 'extreme physics', deals with topics concerning superstring theories, multiverse, quantum teleportation, negative energy, and more, that only few years ago were considered scientific imaginations or purely speculative physics. Present experimental lines of evidence and implications of cosmological observations seem on the contrary support such theories. These new physical developments lead to informational limits, as the quantity of information, that a physical system can record, and computational limits, resulting from considerations regarding black holes and space-time fluctuations. In this paper I consider important limits for information and computation resulting in particular from string theories and its foundations.

  10. Ethical issues in livestock cloning.

    Science.gov (United States)

    Thompson, P B

    1999-01-01

    Although cloning may eventually become an important technology for livestock production, four ethical issues must be addressed before the practice becomes widespread. First, researchers must establish that the procedure is not detrimental to the health or well-being of affected animals. Second, animal research institutions should evaluate the net social benefits to livestock producers by weighing the benefits to producers against the opportunity cost of research capacity lost to biomedical projects. Third, scientists should consider the indirect effects of cloning research on the larger ethical issues surrounding human cloning. Finally, the market structure for products of cloned animals should protect individual choice, and should recognize that many individuals find the prospect of cloning (or consuming cloned animals) repugnant. Analysis of these four issues is complicated by spurious arguments alleging that cloning will have a negative impact on environment and genetic diversity.

  11. Report from the 3rd Workshop on Extremely Large Databases

    Directory of Open Access Journals (Sweden)

    Jacek Becla

    2010-02-01

    Full Text Available Academic and industrial users are increasingly facing the challenge of petabytes of data, but managing and analyzing such large data sets still remains a daunting task. Both the database and the map/reduce communities worldwide are working on addressing these issues. The 3rdExtremely Large Databases workshop was organized to examine the needs of scientific communities beginning to face these issues, to reach out to European communities working on extremely large scale data challenges, and to brainstorm possible solutions. The science benchmark that emerged from the 2nd workshop in this series was also debated. This paper is the final report of the discussions and activities at this workshop.

  12. Extreme conditions (p, T, H)

    Energy Technology Data Exchange (ETDEWEB)

    Mesot, J. [Lab. for Neutron Scattering ETH Zurich, Zurich (Switzerland) and Paul Scherrer Institute, Villigen (Switzerland)

    1996-11-01

    The aim of this paper is to summarize the sample environment which will be accessible at the SINQ. In order to illustrate the type of experiments which will be feasible under extreme conditions of temperature, magnetic field and pressure at the SINQ a few selected examples are also given. (author) 7 figs., 14 refs.

  13. Extreme cervical elongation after sacrohysteropexy

    NARCIS (Netherlands)

    Vierhout, M.E.; Futterer, J.J.

    2013-01-01

    We present a case of extreme cervical elongation with a cervix of 12 cm after an unusual operation in which the uterine corpus was directly fixed to the promontory, and which became symptomatic after 8 years. The possible pathophysiology of cervical elongation is discussed. Diagnosing a case of seve

  14. Applied extreme-value statistics

    Energy Technology Data Exchange (ETDEWEB)

    Kinnison, R.R.

    1983-05-01

    The statistical theory of extreme values is a well established part of theoretical statistics. Unfortunately, it is seldom part of applied statistics and is infrequently a part of statistical curricula except in advanced studies programs. This has resulted in the impression that it is difficult to understand and not of practical value. In recent environmental and pollution literature, several short articles have appeared with the purpose of documenting all that is necessary for the practical application of extreme value theory to field problems (for example, Roberts, 1979). These articles are so concise that only a statistician can recognise all the subtleties and assumptions necessary for the correct use of the material presented. The intent of this text is to expand upon several recent articles, and to provide the necessary statistical background so that the non-statistician scientist can recognize and extreme value problem when it occurs in his work, be confident in handling simple extreme value problems himself, and know when the problem is statistically beyond his capabilities and requires consultation.

  15. Extreme Energy Events Monitoring report

    CERN Document Server

    Baimukhamedova, Nigina

    2015-01-01

    Following paper reflects the progress I made on Summer Student Program within Extreme Energy Events Monitor project I was working on. During 8 week period I managed to build a simple detector system that is capable of triggering events similar to explosions (sudden change in sound levels) and measuring approximate location of the event. Source codes are available upon request and settings described further.

  16. Generic Hurricane Extreme Seas State

    DEFF Research Database (Denmark)

    Wehmeyer, Christof; Skourup, Jesper; Frigaard, Peter

    2012-01-01

    the US east coast and the Gulf of Mexico (1851 - 2009) and Japanese east coast (1951 -2009) form the basis for Weibull extreme value analyses to determine return period respective maximum wind speeds. Unidirectional generic sea state spectra are obtained by application of the empirical models...

  17. SUPPLIER ISSUES FOR LEAN IMPLEMENTATION

    Directory of Open Access Journals (Sweden)

    BHIM SINGH

    2011-05-01

    Full Text Available Applying lean manufacturing philosophy is one of the most important concepts that help enterprises to gain competitive advantage in the world market. Suppliers are an important factor contributing to thesuccess of going lean. Major businesses in India as well as in other world, have been trying to integrate its suppliers to give better performance. In Indian small & medium scale enterprises (SME,application of lean manufacturing strategies especially in terms of supplier integration, have been far fewer. Indian SMEs are still resisting accepting the role of their suppliers to make them leaner. The aim of this study was to identify the supplier issues and their weightage in implementing the lean philosophy in Indian SMEs. The research hypothesizes that there are big opportunities for improvement in the Indian SMEs if it is made leaner by integrating its suppliers in its manufacturing system. Author identified total 21 supplier issues and divided these 21 supplier issues in four categories on conceptual basis named as Supplier Management strategy, Information Sharing with supplier, Supplier Integration, Capability to deal with uncertainty. Mean scores of all four categorized groups of supplier issues are ranked.

  18. PREFACE: CEWQO Topical Issue CEWQO Topical Issue

    Science.gov (United States)

    Bozic, Mirjana; Man'ko, Margarita

    2009-09-01

    This topical issue of Physica Scripta collects selected peer-reviewed contributions based on invited and contributed talks and posters presented at the 15th Central European Workshop on Quantum Optics (CEWQO) which took place in Belgrade 29 May-3 June 2008 (http://cewqo08.phy.bg.ac.yu). On behalf of the whole community took place in Belgrade 29 May-3 June 2008 (http://cewqo08.phy.bg.ac.yu, cewqo08.phy.bg.ac.yu). On behalf of the whole community of the workshop, we thank the referees for their careful reading and useful suggestions which helped to improve all of the submitted papers. A brief description of CEWQO The Central European Workshop on Quantum Optics is a series of conferences started informally in Budapest in 1992. Sometimes small events transform into important conferences, as in the case of CEWQO. Professor Jozsef Janszky, from the Research Institute of Solid State Physics and Optics, is the founder of this series. Margarita Man'ko obtained the following information from Jozsef Janszky during her visit to Budapest, within the framework of cooperation between the Russian and Hungarian Academies of Sciences in 2005. He organized a small workshop on quantum optics in Budapest in 1992 with John Klauder as a main speaker. Then, bearing in mind that a year before Janszky himself was invited by Vladimir Buzek to give a seminar on the same topic in Bratislava, he decided to assign the name 'Central European Workshop on Quantum Optics', considering the seminar in Bratislava to be the first workshop and the one in Budapest the second. The third formal workshop took place in Bratislava in 1993 organized by Vladimir Buzek, then in 1994 (Budapest, by Jozsef Janszky), 1995 and 1996 (Budmerice, Slovakia, by Vladimir Buzek), 1997 (Prague, by Igor Jex), 1999 (Olomouc, Czech Republic, by Zdenek Hradil), 2000 (Balatonfüred, Hungary, by Jozsef Janszky ), 2001 (Prague, by Igor Jex), 2002 (Szeged, Hungary, by Mihaly Benedict), 2003 (Rostock,Germany, by Werner Vogel and

  19. Minor rheumatology: Nonsystemic rheumatic disease of juxta-articular soft tissues of the upper extremity. Part 1

    Directory of Open Access Journals (Sweden)

    A. E. Karateev

    2015-01-01

    Full Text Available Rheumatic diseases of juxta-articular soft tissues (RDJAST (tendinitis, tenosynovitis, bursitis, etc. are one of the most common causes of disability and one the most common reasons for seeking medical advice. To manage patients with RDJAST is an important part of practising rheumatologists’ work. But unfortunately, the issues of diagnosis and therapy of this pathology have been relatively rarely discussed on the pages of Russian medical journals and at the scientific congresses and conferences of rheumatologists in recent years. This review is to refresh physicians’interest in this problem. Part 1 of this review briefly considers the general issues relating to the epidemiology, pathogenesis, and diagnosis of RDJAST of the upper extremity, such as rotator cuff tendinitis, lateral and medial epicondylitis, stenosing flexor tenosynovitis, de Quervain’s syndrome, and carpal tunnel syndrome.

  20. Hydrometeorological Extremes and Food Security: Lessons from the 2011 and 2012 harvests in the United States

    Science.gov (United States)

    Lobell, D. B.; Roberts, M.; Schlenker, W.

    2012-12-01

    The United States is both a major global producer of grain and a relatively variable production region. As such, it is an important driver of volatility in global food supply and food prices, which in turn affects food security in many regions. This fact was underscored by the 2012 season, in which a major drought caused production losses, which in turn led to international price increases. However, 2011 also was unusually hot and thus a good illustration of many of the issues surrounding climate change. This paper will discuss progress in modeling the impacts of extreme heat and drought on U.S. corn production, which comes from a combination of empirical and process-based approaches. One important lesson is that drought from the perspective of corn is different than traditional measures of drought, and in particular extreme heat plays a more direct role via effects on vapor pressure deficit. Implications for future impacts, interactions with carbon dioxide, and potential adaptation strategies will be discussed.

  1. Seven Issues Revisited

    DEFF Research Database (Denmark)

    Grønbæk, Kaj; Whitehead, Jim; De Bra, Paul

    2002-01-01

    It has been 15 years since the original presentation by Frank Halasz at Hypertext'87 on seven issues for the next generation of hypertext systems. These issues are: Search and Query Composites Virtual Structures Computation in/over hypertext network Versioning Collaborative Work Extensibility...... and Tailorability Since that time, these issues have formed the nucleus of multiple research agendas within the Hypertext community. Befitting this direction-setting role, the issues have been revisited several times, by Halasz in his 1991 Hypertext keynote talk, and by Randy Trigg in his 1996 Hypertext keynote...... five years later. Additionally, over the intervening 15 years, many research systems have addressed the original seven issues, and new research avenues have opened up. The goal of this panel is to begin the process of developing a new set of seven issues for the next generation of hypertext system...

  2. Current issues and actions

    Energy Technology Data Exchange (ETDEWEB)

    Black, D.G.

    1995-06-01

    This section of the 1994 Hanford Site Environmental Report summarizes the progress that has been made toward achieving full regulatory compliance at the Hanford Site. Ongoing compliance self-assessments, implementation of the Tri-Party Agreement, and public meetings continue to identify environmental compliance issues. These issues are discussed openly with the regulatory agencies and with the public to ensure that all environmental compliance issues are addressed.

  3. Issues of environmental (irresponsibility

    Directory of Open Access Journals (Sweden)

    Jana Dundelová

    2013-01-01

    Full Text Available In this paper the author reflects the questions of humans’ relationship to the environment and of their ecological behaviour that becomes together with the development of modern technologies increasingly relevant just as the question whether humans are able to affect fundamentally the environment on the Earth by their activities. According to some authors (e.g. Ehrlich, 1968; Gore, 2006; Wilson, 1995; Winter, Koger, 2009; Šmajs, 2005 human survival is directly connected with people’s relationship to the nature; but other influential authors have contradictory opinions or they are at least afraid of overestimation of ecological activities that can lead to neglecting of other important problems (e.g. Simon, 1981; Goklany, 2007; Lomborg, 2007; Klaus, 2007, 2009.These issues are dealt in this article mainly from the perspective of psychological theories and concepts – the Freud’s concept of unconsciousness is discussed as well as groupthink, theory of dissonance, contingency trap, Milgram’s theory of autonomous and agentic state of consciousness, group and intergroup behaviour, social dilemma – tragedy of the commons. Achieving a sustainable way of life depends on the equilibrium between consumption of individuals and regenerative abilities of the natural environment. However, people still behave as if they were separated from the nature. The linking axis of this article is the question of psychic powers causing individual and collective ecological (irresponsibility and the resulting consequences.

  4. Radioactive waste storage issues

    Energy Technology Data Exchange (ETDEWEB)

    Kunz, Daniel E. [Colorado Christian Univ., Lakewood, CO (United States)

    1994-08-15

    In the United States we generate greater than 500 million tons of toxic waste per year which pose a threat to human health and the environment. Some of the most toxic of these wastes are those that are radioactively contaminated. This thesis explores the need for permanent disposal facilities to isolate radioactive waste materials that are being stored temporarily, and therefore potentially unsafely, at generating facilities. Because of current controversies involving the interstate transfer of toxic waste, more states are restricting the flow of wastes into - their borders with the resultant outcome of requiring the management (storage and disposal) of wastes generated solely within a state`s boundary to remain there. The purpose of this project is to study nuclear waste storage issues and public perceptions of this important matter. Temporary storage at generating facilities is a cause for safety concerns and underscores, the need for the opening of permanent disposal sites. Political controversies and public concern are forcing states to look within their own borders to find solutions to this difficult problem. Permanent disposal or retrievable storage for radioactive waste may become a necessity in the near future in Colorado. Suitable areas that could support - a nuclear storage/disposal site need to be explored to make certain the health, safety and environment of our citizens now, and that of future generations, will be protected.

  5. Extremal non-BPS black holes and entropy extremization

    CERN Document Server

    Lópes-Cardoso, G; Lust, D; Perz, J; Cardoso, Gabriel Lopes; Grass, Viviane; Lust, Dieter; Perz, Jan

    2006-01-01

    At the horizon, a static extremal black hole solution in N=2 supergravity in four dimensions is determined by a set of so-called attractor equations which, in the absence of higher-curvature interactions, can be derived as extremization conditions for the black hole potential or, equivalently, for the entropy function. We contrast both methods by explicitly solving the attractor equations for a one-modulus prepotential associated with the conifold. We find that near the conifold point, the non-supersymmetric solution has a substantially different behavior than the supersymmetric solution. We analyze the stability of the solutions and the extrema of the resulting entropy as a function of the modulus. For the non-BPS solution the region of attractivity and the maximum of the entropy do not coincide with the conifold point.

  6. Introduction: Special issue on Global Lesbian Cinema.

    Science.gov (United States)

    Farr, Daniel

    2012-01-01

    This article offers a brief introduction to this special issue on Global Lesbian Cinema. This issue particularly highlights the importance of recognizing lesbian discourse as a separate, related piece of the discourse of queer transnational and global cinema. Subsequently, brief summaries of the eight articles of this collection are provided.

  7. EDITORIAL HPJ SPECIAL ISSUE INTRODUCTION

    Energy Technology Data Exchange (ETDEWEB)

    Farfan, E.

    2011-10-01

    Radioecology is the study of the fate and transport and potential effects of radionuclides and associated contaminants in the environment. In short, it is the science that describes the fundamental connection between environmental health and human health risks. As such, radioecology can and has provided the credible, consistent and defensible basis for the successful and cost-effective environmental cleanup and closure of nuclear production and waste sites. In addition, radioecology also provides the technical basis for making timely and reliable decisions on cleanup in the aftermath of nuclear incidents such as Chernobyl and Fukushima. The 1986 Chernobyl Nuclear Power Plant (ChNPP) accident resulted in catastrophic health, social, and economic consequences in many countries, predominantly, Ukraine, Belarus, and Russia. The extent of radioactive contamination, levels and forms of contamination, and diversity of the ecosystems affected by the accident did not have any precedent and provided unique opportunities for environmental scientists around the world. Following the natural course of their development, populations of species and their communities found themselves in conditions of chronic radiation exposure that exceeded the natural background by factors of hundreds and thousands. Anything similar would have been extremely difficult if not impossible to recreate in a scientific laboratory. Consequently, since the first few years after the accident, many teams of scientists have visited the Chernobyl Exclusion Zone (ChEZ). The knowledge gained by studying the consequences of this accident has tremendous importance. The concept of an international research and technical center to address the problems involving nuclear and radiological accidents became a reality with the establishment of the International Chernobyl Center (ICC). In May 1995, the US and Ukraine signed a Protocol of Intent on establishment of the ICC, and the government of Ukraine appealed to the

  8. Observing Planetary Nebulae with JWST and Extremely Large Telescopes

    Science.gov (United States)

    Sahai, Raghvendra

    2015-01-01

    Most stars in the Universe that leave the main sequence in a Hubble time will end their lives evolving through the Planetary Nebula (PN) evolutionary phase. The heavy mass loss which occurs during the preceding AGB phase is important across astrophysics, dramatically changing the course of stellar evolution, dominantly contributing to the dust content of the interstellar medium, and influencing its chemical composition. The evolution from the AGB phase to the PN phases remains poorly understood, especially the dramatic transformation that occurs in the morphology of the mass-ejecta as AGB stars and their round circumstellar envelopes evolve into mostly PNe, the majority of which deviate strongly from spherical symmetry. In addition, although the PN [OIII] luminosity function (PNLF) has been used as a standard candle (on par with distance indicators such as Cepheids), we do not understand why it works. It has been argued that the resolution of these issues may be linked to binarity and associated processes such as mass transfer and common envelope evolution.Thus, understanding the formation and evolution of PNe is of wide astrophysical importance. PNe have long been known to emit across a very large span of wavelengths, from the radio to X-rays. Extensive use of space-based observatories at X-ray (Chandra/ XMM-Newton), optical (HST) and far-infrared (Spitzer, Herschel) wavelengths in recent years has produced significant new advances in our knowledge of these objects. Given the expected advent of the James Webb Space Telescope in the near future, and ground-based Extremely Large Telescope(s) somewhat later, this talk will focus on future high-angular-resolution, high-sensitivity observations at near and mid-IR wavelengths with these facilities that can help in addressing the major unsolved problems in the study of PNe.

  9. Techniques: Integrating the National Issues Forums into ABE Programs.

    Science.gov (United States)

    Colhapp, Barbara Jones

    1989-01-01

    This article discusses the National Issues Forum (NIF), a national, nonpartisan program designed to encourage citizen discussion of important public issues. The programs try to recreate the town meeting concept of reaching consensus on public issues. Short workbooks are available on two reading levels for issues such as the superpowers, crime,…

  10. Special Issue "Biomaterials and Bioprinting".

    Science.gov (United States)

    Chua, Chee Kai; Yeong, Wai Yee; An, Jia

    2016-09-14

    The emergence of bioprinting in recent years represents a marvellous advancement in 3D printing technology. It expands the range of 3D printable materials from the world of non-living materials into the world of living materials. Biomaterials play an important role in this paradigm shift. This Special Issue focuses on biomaterials and bioprinting and contains eight articles covering a number of recent topics in this emerging area.

  11. Volume 7, Issue 1 2016

    OpenAIRE

    Tracy Creagh; John Clarke; Karen Nelson

    2016-01-01

    Welcome to Volume 7 of Student Success.  This editorial has two parts: The first part maintains the “doing things differently” tradition, making readers aware by chronicling the publishing of the journal in an open access (OA) forum.  Future editorials will briefly discuss other aspects and issues pertaining to the new scholarly publishing landscape that this journal adheres to, such as:  Creative Commons Licencing; ORCID IDs; considerations of new peer review models and importantly; measurin...

  12. A global quantification of compound precipitation and wind extremes

    Science.gov (United States)

    Martius, Olivia; Pfahl, Stephan; Chevalier, Clément

    2016-07-01

    The concomitant occurrence of extreme precipitation and winds can have severe impacts. Here this concomitant occurrence is quantified globally using ERA-Interim reanalysis data. A logistic regression model is used to determine significant changes in the odds of precipitation extremes given a wind extreme that occurs on the same day, the day before, or the day after. High percentages of cooccurring wind and precipitation extremes are found in coastal regions and in areas with frequent tropical cyclones, with maxima of more than 50% of concomitant events. Strong regional-scale variations in this percentage are related to the interaction of weather systems with topography resulting in Föhn winds, gap winds, and orographic drying and the structure and tracks of extratropical and tropical cyclones. The percentage of concomitant events increases substantially if spatial shifts by one grid point are taken into account. Such spatially shifted but cooccurring events are important in insurance applications.

  13. A global quantification of compound precipitation and wind extremes

    Science.gov (United States)

    Martius, Olivia; Pfahl, Stephan; Chevalier, Clément

    2017-04-01

    The concomitant occurrence of extreme precipitation and winds can have severe impacts. Here this concomitant occurrence is quantified globally using ERA-Interim reanalysis data. A logistic regression model is used to determine significant changes in the odds ratio of precipitation extremes given a wind extreme occurs on the same day, the day before or the day after. High percentages of co-occurring wind and precipitation extremes are found in coastal regions and in areas with frequent tropical cyclones, with maxima of more than 50% of concomitant events. Strong regional-scale variations in this percentage are related to the interaction of weather systems with topography resulting in Föhn winds, gap winds, and orographic drying, and the structure and tracks of extratropical and tropical cyclones. The percentage of concomitant events increases substantially if spatial shifts by one grid point are taken into account. Such spatially shifted, but co-occurring events are important in insurance applications.

  14. Upper extremity function: What's posture got to do with it?

    Science.gov (United States)

    Harbourne, Regina; Kamm, Kathi

    2015-01-01

    This perspective paper reviews the linkage between developing postural control and upper extremity function. We suggest updated principles for guiding clinical practice, based on current views from motor learning, motor development, and motor control research. Using three clinical examples, we illustrate principles focusing on the use of variability, the importance of errors in learning movement, task specific exploration and practice, and the critical timing necessary to build skill of the upper extremity in a variety of postures. These principles differ from historic approaches in therapeutic exercise, which treated posture as a separate system and a precursor for extremity skill building. We maintain that current movement science supports the tight interaction of posture and upper extremity function through developmental time and in real time, such that one system cannot be considered separate from the other. Specific suggestions for clinical practice flow from the guiding principles outlined in this paper.

  15. Analysis of Network Traffic with Extreme Value Theory

    Institute of Scientific and Technical Information of China (English)

    舒炎泰; 汪广洪; 高德云; 刘嘉焜; 王旭

    2003-01-01

    It is very important to analyze network traffic in the network control and management. In this paper,extreme value theory is first introduced and a model with threshold methods is proposed to analyze the characteristics of network traffic. In this model, only some traffic data that is greater than threshold value is considered.Then the proposed model with the trace is simulated by using S-Plus software. The modeling results show the network traffic model constructed from the extreme value theory fits well with that of empirical distribution. Finally, the extreme value model with the FARIMA(p,d,q) modeling is compared. The analytical results illustrate that extreme value theory has a good application foreground in the statistic analysis of network traffic. In addition, since only some traffic data which is greater than the threshold is processed, the computation overhead is reduced greatly.

  16. ECOPHARMACOVIGILANCE: ITS IMPORTANCE AND CHALLENGES

    OpenAIRE

    Dr. Bhavana Srivastava

    2014-01-01

    Active pharmaceutical ingredients represent a group of emerging environmental contamination. Even in trace amounts, they are of great concern due to then continuous introduction into the environment, their impact an ecosystem and human and vetenery health is of great importance. This has given birth to the science of Ecopharmacovigilance (EPV). It aims to ensure that significant environmental issues associated with pharmaceuticals in the environment are identified and managed appropriately. ...

  17. A twenty-first century California observing network for monitoring extreme weather events

    Science.gov (United States)

    White, A.B.; Anderson, M.L.; Dettinger, M.D.; Ralph, F.M.; Hinojosa, A.; Cayan, D.R.; Hartman, R.K.; Reynolds, D.W.; Johnson, L.E.; Schneider, T.L.; Cifelli, R.; Toth, Z.; Gutman, S.I.; King, C.W.; Gehrke, F.; Johnston, P.E.; Walls, C.; Mann, Dorte; Gottas, D.J.; Coleman, T.

    2013-01-01

    During Northern Hemisphere winters, the West Coast of North America is battered by extratropical storms. The impact of these storms is of paramount concern to California, where aging water supply and flood protection infrastructures are challenged by increased standards for urban flood protection, an unusually variable weather regime, and projections of climate change. Additionally, there are inherent conflicts between releasing water to provide flood protection and storing water to meet requirements for water supply, water quality, hydropower generation, water temperature and flow for at-risk species, and recreation. In order to improve reservoir management and meet the increasing demands on water, improved forecasts of precipitation, especially during extreme events, is required. Here we describe how California is addressing their most important and costliest environmental issue – water management – in part, by installing a state-of-the-art observing system to better track the area’s most severe wintertime storms.

  18. Validity and interobserver agreement of lower extremity local tissue water measurements in healthy women using tissue dielectric constant

    DEFF Research Database (Denmark)

    Jensen, Mads R; Birkballe, Susanne; Nørregaard, Susan

    2012-01-01

    Tissue dielectric constant (TDC) measurement may become an important tool in the clinical evaluation of chronic lower extremity swelling in women; however, several factors are known to influence TDC measurements, and comparative data on healthy lower extremities are few....

  19. Mechanisms underlying temperature extremes in Iberia: a Lagrangian perspective

    Directory of Open Access Journals (Sweden)

    João A. Santos

    2015-04-01

    Full Text Available The mechanisms underlying the occurrence of temperature extremes in Iberia are analysed considering a Lagrangian perspective of the atmospheric flow, using 6-hourly ERA-Interim reanalysis data for the years 1979–2012. Daily 2-m minimum temperatures below the 1st percentile and 2-m maximum temperatures above the 99th percentile at each grid point over Iberia are selected separately for winter and summer. Four categories of extremes are analysed using 10-d backward trajectories initialized at the extreme temperature grid points close to the surface: winter cold (WCE and warm extremes (WWE, and summer cold (SCE and warm extremes (SWE. Air masses leading to temperature extremes are first transported from the North Atlantic towards Europe for all categories. While there is a clear relation to large-scale circulation patterns in winter, the Iberian thermal low is important in summer. Along the trajectories, air mass characteristics are significantly modified through adiabatic warming (air parcel descent, upper-air radiative cooling and near-surface warming (surface heat fluxes and radiation. High residence times over continental areas, such as over northern-central Europe for WCE and, to a lesser extent, over Iberia for SWE, significantly enhance these air mass modifications. Near-surface diabatic warming is particularly striking for SWE. WCE and SWE are responsible for the most extreme conditions in a given year. For WWE and SCE, strong temperature advection associated with important meridional air mass transports are the main driving mechanisms, accompanied by comparatively minor changes in the air mass properties. These results permit a better understanding of mechanisms leading to temperature extremes in Iberia.

  20. Extreme precipitation and extreme streamflow in the Dongjiang River Basin in southern China

    Directory of Open Access Journals (Sweden)

    W. Wang

    2007-07-01

    Full Text Available Extreme hydro-meteorological events have become the focus of more and more studies in the last decade. Due to the complexity of the spatial pattern of changes in precipitation processes, it is still hard to establish a clear view of how precipitation has changed and how it will change in the future. In the present study, changes in extreme precipitation and streamflow processes in the Dongjiang River Basin in southern China are investigated. It was shown that little change is observed in annual extreme precipitation in terms of various indices, but some significant changes are found in the precipitation processes on a monthly basis. The result indicates that when detecting climate changes, besides annual indices, seasonal variations in extreme events should be considered as well. Despite of little change in annual extreme precipitation series, significant changes are detected in several annual extreme flood flow and low-flow series, mainly at the stations along the main channel of Dongjiang River, which are affected significantly by the operation of several major reservoirs. The result highlights the importance of evaluating the impacts of human activities in assessing the changes of extreme streamflows. In addition, three non-parametric methods that are not-commonly used by hydro-meteorology community, i.e., Kolmogorov–Smirnov test, Levene's test and quantile test, are introduced and assessed by Monte Carlo simulation in the present study to test for changes in the distribution, variance and the shift of tails of different groups of dataset. Monte Carlo simulation result shows that, while all three methods work well for detecting changes in two groups of data with large data size (e.g., over 200 points in each group and big difference in distribution parameters (e.g., over 100% increase of scale parameter in Gamma distribution, none of them are powerful enough for small data sets (e.g., less than 100 points and small distribution

  1. JPRS Report, Proliferation Issues

    Science.gov (United States)

    2016-03-24

    competence in handling delicate and agricultral projects, medical research, sterilizing issues. tools, and digging oilfields. Electricity Minister Engineer ...CONTENTS 21 October 1992 [This report contains foreign media information on issues related to worldwide proliferation and transfer activities in nuclear...be built by shipping plutonium through the Strait of Malacca, For- the year 2006 to meet the soaring electricity demand, eign Ministry officials said

  2. Medical Issues in Adoption

    Science.gov (United States)

    ... Teaching Kids to Be Smart About Social Media Medical Issues in Adoption KidsHealth > For Parents > Medical Issues in Adoption Print A A A What's ... some things to know about the health and medical care of an adopted child, before, during, and ...

  3. Editorial Introduction - Issue 5

    Directory of Open Access Journals (Sweden)

    Emily Lynema

    2008-12-01

    Full Text Available Welcome to the 5th issue of the Code4Lib Journal. We've come a long way in just over a year! We hope you take a few minutes to celebrate those accomplishments with us as you explore issue 5 and read about the innovations, ideas, and experiences shared there. Let's learn from each other.

  4. Ethical issues in genetics.

    Science.gov (United States)

    Shannon, T A

    1999-03-01

    The first section of the Notes on Moral Theology reviews ethical issues in genetics through the lenses of privacy-confidentiality; risk-benefit analysis in relation to prenatal diagnosis and gene therapy; and freedom-determinism/human dignity in the context of cloning. The author provides an overview of developments in genetics and highlights thematic issues common to these developments.

  5. Potential impacts of land-use on climate variability and extremes

    Science.gov (United States)

    Zhang, Huqiang; Li, Yaohui; Gao, Xuejie

    2009-09-01

    This study aims at exploring potential impacts of land-use vegetation change (LUC) on regional climate variability and extremes. Results from a pair of Australian Bureau of Meteorology Research Centre (BMRC) climate model 54-yr (1949-2002) integrations have been analysed. In the model experiments, two vegetation datasets are used, with one representing current vegetation coverage in China and the other approximating its potential coverage without human intervention. The model results show potential impacts of LUC on climate variability and extremes. There are statistically significant changes of surface interannual climate variability simulated by the model. Using different vegetation datasets, significant changes in correlation coefficients between tropical Pacific Niño3.4 SST and precipitation and surface temperature over East Asia are identified, which indicate that changes in vegetation coverage may alter ENSO impacts on regional climate variability. Because of the lack of slowly varying surface processes when forests are removed and less rainfall is received following LUC, the ENSO signal simulated by the model becomes stronger. Results furthermore show that land-use could modulate characteristics of decadal variations in this region. When using current vegetation coverage, the model gives better simulation of observed climate variations in the region than the case using potential vegetation coverage. In addition, results suggest that land-use could be a potential factor contributing to the prolonged drought in central-west China. Changes in local climate extremes, including precipitation and surface temperature maxima and minima, are also identified. Overall, this study has illustrated the importance of further investigation of such important issues in future land-use studies.

  6. On causality of extreme events

    CERN Document Server

    Zanin, Massimiliano

    2016-01-01

    Multiple metrics have been developed to detect causality relations between data describing the elements constituting complex systems, all of them considering their evolution through time. Here we propose a metric able to detect causality within static data sets, by analysing how extreme events in one element correspond to the appearance of extreme events in a second one. The metric is able to detect both linear and non-linear causalities; to analyse both cross-sectional and longitudinal data sets; and to discriminate between real causalities and correlations caused by confounding factors. We validate the metric through synthetic data, dynamical and chaotic systems, and data representing the human brain activity in a cognitive task.

  7. Extreme Conditions Modeling Workshop Report

    Energy Technology Data Exchange (ETDEWEB)

    Coe, Ryan Geoffrey [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Neary, Vincent Sinclair [Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Lawon, Michael J. [National Renewable Energy Lab. (NREL), Golden, CO (United States); Yu, Yi-Hsiang [National Renewable Energy Lab. (NREL), Golden, CO (United States); Weber, Jochem [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    2014-07-01

    Sandia National Laboratories (SNL) and the National Renewable Energy Laboratory (NREL) hosted the Wave Energy Converter (WEC) Extreme Conditions Modeling (ECM) Workshop in Albuquerque, New Mexico on May 13–14, 2014. The objective of the workshop was to review the current state of knowledge on how to numerically and experimentally model WECs in extreme conditions (e.g. large ocean storms) and to suggest how national laboratory resources could be used to improve ECM methods for the benefit of the wave energy industry. More than 30 U.S. and European WEC experts from industry, academia, and national research institutes attended the workshop, which consisted of presentations from W EC developers, invited keynote presentations from subject matter experts, breakout sessions, and a final plenary session .

  8. Cacti with Extremal PI Index

    Directory of Open Access Journals (Sweden)

    Chunxiang Wang

    2016-12-01

    Full Text Available The vertex PI index PI(G=∑ xy∈E(G [n xy (x‎+‎n xy (y] PI(G=∑xy∈E(G[nxy(x‎+‎nxy(y] is a distance-based molecular structure descriptor‎, ‎where n xy (x nxy(x denotes the number of vertices which are closer to the vertex x x than to the vertex y y and which has been the considerable research in computational chemistry dating back to Harold Wiener in 1947‎. ‎A connected graph is a cactus if any two of its cycles have at most one common vertex‎. ‎In this paper‎, ‎we completely determine the extremal graphs with the greatest and smallest vertex PI indices mong all cacti with a fixed number of vertices‎. ‎As a consequence‎, ‎we obtain the sharp bounds with corresponding extremal cacti and extend a known result‎.

  9. On causality of extreme events

    Directory of Open Access Journals (Sweden)

    Massimiliano Zanin

    2016-06-01

    Full Text Available Multiple metrics have been developed to detect causality relations between data describing the elements constituting complex systems, all of them considering their evolution through time. Here we propose a metric able to detect causality within static data sets, by analysing how extreme events in one element correspond to the appearance of extreme events in a second one. The metric is able to detect non-linear causalities; to analyse both cross-sectional and longitudinal data sets; and to discriminate between real causalities and correlations caused by confounding factors. We validate the metric through synthetic data, dynamical and chaotic systems, and data representing the human brain activity in a cognitive task. We further show how the proposed metric is able to outperform classical causality metrics, provided non-linear relationships are present and large enough data sets are available.

  10. On causality of extreme events

    Science.gov (United States)

    2016-01-01

    Multiple metrics have been developed to detect causality relations between data describing the elements constituting complex systems, all of them considering their evolution through time. Here we propose a metric able to detect causality within static data sets, by analysing how extreme events in one element correspond to the appearance of extreme events in a second one. The metric is able to detect non-linear causalities; to analyse both cross-sectional and longitudinal data sets; and to discriminate between real causalities and correlations caused by confounding factors. We validate the metric through synthetic data, dynamical and chaotic systems, and data representing the human brain activity in a cognitive task. We further show how the proposed metric is able to outperform classical causality metrics, provided non-linear relationships are present and large enough data sets are available. PMID:27330866

  11. Navigating "thorny" issues

    Science.gov (United States)

    Hutchinson, Kashema; Gilbert, Aderinsola; Malyukova, Anna

    2016-09-01

    In their article Mindfulness and discussing ` thorny' issues in the classroom Konstantinos Alexakos et al. (Cult Stud Sci Educ, 2016. doi: 10.1007/s11422-015-9718-0) describe "thorny" issues as "difficult topics to discuss because they are more personal to some perhaps even cause pain and violence." As women from different backgrounds, we engage in a metalogue, which expands on our thoughts and emotions the thorny issues evoked. Our discussion is grounded in theoretical frameworks of mindfulness, wellness, and safe space for learning. We also reflect on our experiences of facing some of the thorny issues in our academic and personal lives. Having trust and respect for one another and being aware of thorny issues allows for a meaningful conversation about the complexity and nuances involved in discussing difficult topics in a classroom setting.

  12. Upper Extremity Injuries in Gymnasts.

    Science.gov (United States)

    Wolf, Megan R; Avery, Daniel; Wolf, Jennifer Moriatis

    2017-02-01

    Gymnastics is a unique sport, which loads the wrist and arms as weight-bearing extremities. Because of the load demands on the wrist in particular, stress fractures, physeal injury, and overuse syndromes may be observed. This spectrum of injury has been termed "gymnast's wrist," and incorporates such disorders as wrist capsulitis, ligamentous tears, triangular fibrocartilage complex tears, chondromalacia of the carpus, stress fractures, distal radius physeal arrest, and grip lock injury.

  13. Racial Extremism in the Army

    Science.gov (United States)

    1998-04-01

    example, one soldier has a picture of Martin Luther King ;. another has a picture of Ronald Reagan). What is legal, appropriate action? (1) The particular...degree requirements for the 46h Judge Advocate Officer Graduate Course. 2 Virginia A. White, Killings Tied to Racism , FAYETTEVILLE OBSERVER-TIMES...causes to lure new members to their organizations. Lieutenant Colonel Edwin W. Anderson, Jr ., Right Wing Extremism in America and its Implications for

  14. Typologies of Extreme Longevity Myths

    OpenAIRE

    2010-01-01

    Purpose. Political, national, religious, and other motivations have led the media and even scientists to errantly accept extreme longevity claims prima facie. We describe various causes of false claims of extraordinary longevity. Design and Methods. American Social Security Death Index files for the period 1980–2009 were queried for individuals with birth and death dates yielding ages 110+ years of age. Frequency was compared to a list of age-validated supercentenarians maintained by the Ge...

  15. Moderate and extreme maternal obesity.

    LENUS (Irish Health Repository)

    Abdelmaboud, M O

    2012-05-01

    The aim of this study was to investigate the prevalence of moderate and extreme obesity among an Irish obstetric population over a 10-year period, and to evaluate the obstetric features of such pregnancies. Of 31,869 women delivered during the years 2000-2009, there were 306 women in the study group, including 173 in the moderate or Class 2 obese category (BMI 35-39.9) and 133 in the extreme or Class 3 obese category (BMI > or = 40).The prevalence of obese women with BMI > or = 35 was 9.6 per 1000 (0.96%), with an upward trend observed from 2.1 per 1000 in the year 2000, to 11.8 per 1000 in the year 2009 (P = 0.001). There was an increase in emergency caesarean section (EMCS) risk for primigravida versus multigravid women, within both obese categories (P < 0.001). However, there was no significant difference in EMCS rates observed between Class 2 and Class 3 obese women, when matched for parity. The prevalence of moderate and extreme obesity reported in this population is high, and appears to be increasing. The increased rates of abdominal delivery, and the levels of associated morbidity observed, have serious implications for such women embarking on pregnancy.

  16. Technology improves upper extremity rehabilitation.

    Science.gov (United States)

    Kowalczewski, Jan; Prochazka, Arthur

    2011-01-01

    Stroke survivors with hemiparesis and spinal cord injury (SCI) survivors with tetraplegia find it difficult or impossible to perform many activities of daily life. There is growing evidence that intensive exercise therapy, especially when supplemented with functional electrical stimulation (FES), can improve upper extremity function, but delivering the treatment can be costly, particularly after recipients leave rehabilitation facilities. Recently, there has been a growing level of interest among researchers and healthcare policymakers to deliver upper extremity treatments to people in their homes using in-home teletherapy (IHT). The few studies that have been carried out so far have encountered a variety of logistical and technical problems, not least the difficulty of conducting properly controlled and blinded protocols that satisfy the requirements of high-level evidence-based research. In most cases, the equipment and communications technology were not designed for individuals with upper extremity disability. It is clear that exercise therapy combined with interventions such as FES, supervised over the Internet, will soon be adopted worldwide in one form or another. Therefore it is timely that researchers, clinicians, and healthcare planners interested in assessing IHT be aware of the pros and cons of the new technology and the factors involved in designing appropriate studies of it. It is crucial to understand the technical barriers, the role of telesupervisors, the motor improvements that participants can reasonably expect and the process of optimizing IHT-exercise therapy protocols to maximize the benefits of the emerging technology.

  17. Ethical issues of incorporating spiritual care into clinical practice.

    Science.gov (United States)

    Polzer Casarez, Rebecca L; Engebretson, Joan C

    2012-08-01

    The aim of this article was to analyse the scholarly discourse on the ethical issues of incorporating spirituality and religion into clinical practice. Spirituality is an important aspect of health care, yet the secularisation of health care presents ethical concerns for many health providers. Health providers may have conflicting views regarding if and how to offer spiritual care in the clinical setting. Discursive paper. The discourse analysis uncovered four themes: ethical concerns of omission; ethical concerns of commission; conditions under which health providers prefer to offer spiritual care; and strategies to integrate spiritual care. Ethical concerns of omission of spiritual care include lack of beneficence for not offering holistic care. Ethical concerns of commission are coercion and overstepping one's competence in offering spiritual care. Conditions under which providers are more likely to offer spiritual care are if the patient has a terminal illness, and if the patient requests spiritual care. Strategies for appropriate spiritual care include listening, and remaining neutral and sensitive to spiritual issues. Health providers must be aware of both the concerns of omission and commission. Aristotle's golden mean, an element of virtue ethics, supports a more moderate approach that can be achieved by avoiding the imposition of one's own personal beliefs of a religious persuasion or beliefs of extreme secularisation, and focusing on the beneficence to the patient. Relevance to clinical practice.  Key components for health providers in addressing spiritual concerns are self-reflection, provision of individualised care, cultural competency and communication. © 2012 Blackwell Publishing Ltd.

  18. Outcomes for extremely premature infants.

    Science.gov (United States)

    Glass, Hannah C; Costarino, Andrew T; Stayer, Stephen A; Brett, Claire M; Cladis, Franklyn; Davis, Peter J

    2015-06-01

    Premature birth is a significant cause of infant and child morbidity and mortality. In the United States, the premature birth rate, which had steadily increased during the 1990s and early 2000s, has decreased annually for 7 years and is now approximately 11.39%. Human viability, defined as gestational age at which the chance of survival is 50%, is currently approximately 23 to 24 weeks in developed countries. Infant girls, on average, have better outcomes than infant boys. A relatively uncomplicated course in the intensive care nursery for an extremely premature infant results in a discharge date close to the prenatal estimated date of confinement. Despite technological advances and efforts of child health experts during the last generation, the extremely premature infant (less than 28 weeks gestation) and extremely low birth weight infant (death and disability with 30% to 50% mortality and, in survivors, at least 20% to 50% risk of morbidity. The introduction of continuous positive airway pressure, mechanical ventilation, and exogenous surfactant increased survival and spurred the development of neonatal intensive care in the 1970s through the early 1990s. Routine administration of antenatal steroids during premature labor improved neonatal mortality and morbidity in the late 1990s. The recognition that chronic postnatal administration of steroids to infants should be avoided may have improved outcomes in the early 2000s. Evidence from recent trials attempting to define the appropriate target for oxygen saturation in preterm infants suggests arterial oxygen saturation between 91% and 95% (compared with 85%-89%) avoids excess mortality; however, final analyses of data from these trials have not been published, so definitive recommendations are still pending. The development of neonatal neurocritical intensive care units may improve neurocognitive outcomes in this high-risk group. Long-term follow-up to detect and address developmental, learning, behavioral, and

  19. Understanding Pregnancy and Birth Issues

    Science.gov (United States)

    ... Navigation Bar Home Current Issue Past Issues Understanding Pregnancy and Birth Issues Past Issues / Winter 2008 Table ... turn Javascript on. What is a High-Risk Pregnancy? All pregnancies involve a certain degree of risk ...

  20. Two centuries of extreme events over the Baltic Sea and North Sea regions

    Science.gov (United States)

    Stendel, Martin; den Besselaar Else, van; Abdel, Hannachi; Jaak, Jaagus; Elizabeth, Kent; Christiana, Lefebvre; Gudrun, Rosenhagen; Anna, Rutgersson; Frederik, Schenk; der Schrier Gerard, van; Tim, Woolings

    2017-04-01

    Two centuries of extreme events over the Baltic Sea and North Sea regions In the framework of the BACC 2 (for the Baltic Sea) and NOSCCA projects (for the North Sea region), studies of past and present variability and changes in atmospheric variables within the North Sea region over the instrumental period (roughly the past 200 years) have been investigated. Findings on trends in temperature and precipitation have already been presented. Here we focus on data homogeneity issues and examine how reliable reanalyses are in this context. Unlike most other regions in the world, there is a wealth of old observations available for the Baltic and North Sea regions, most of it in handwritten form in meteorological journals and other publications. These datasets need to be carefully digitised and homogenized. For this, a thorough quality control must be applied; otherwise the digitised datasets may prove useless or even counterproductive. We present evidence that this step cannot be conducted without human interference and thus cannot be fully automated. Furthermore, inhomogeneities due to e.g. instrumentation and station relocations need to be addressed. A wealth of reanalysis products is available, which can help detect such inhomogeneities in observed time series, but at the same time are prone to biases and/or spurious trends themselves e.g. introduced by changes in the availability and quality of the underlying assimilated data. It therefore in general remains unclear in how far we can simulate the pre-satellite era with respect to homogeneity with reanalyses based only on parts of the observing system. Extreme events and changes in extreme situations are more important and of greater (societal) significance than changes in mean climate. However, changes in extreme weather events are difficult to assess not only because they are, per definition, rare events, but also due to the homogeneity issues outlined above. Taking these into account, we present evidence for changes

  1. Impacts of Amazon deforestation on regional weather and climate extremes

    Science.gov (United States)

    Medvigy, D.; Walko, R. L.; Avissar, R.

    2010-12-01

    Recent deforestation projections estimate that 40% of the Amazon rainforest will be deforested by 2050. Many modeling studies have indicated that deforestation will reduce average rainfall in the Amazon. However, very few studies have investigated the potential for deforestation to change the frequency and intensity of extreme climate and weather events. To fill this gap in our understanding, we use a variable-resolution GCM to investigate how precipitation and temperature extremes throughout South America respond to deforestation. The model’s grid mesh is set up to cover South America and nearby oceans at mesoscale (25 km) resolution, and then to gradually coarsen and cover the rest of the world at 200 km resolution. This approach differs from the two most common current approaches: (1) to use a GCM with too coarse of a resolution to evaluate regional climate extremes, or (2) to use a regional atmospheric model that requires lateral boundary conditions from a GCM or reanalysis. We find that deforestation induces large changes in winter (June-July-August) climate throughout much of South America. Extreme cold events become much more common along the eastern slopes of the Andes. The largest changes were in the western Amazon and, surprisingly, in Argentina, far from the actual deforested area. We also find shifts in precipitation extremes, especially in September-October-November. Such changes in temperature and precipitation extremes have important consequences for agriculture, natural ecosystems, and human society.

  2. Plant volatiles in extreme terrestrial and marine environments.

    Science.gov (United States)

    Rinnan, Riikka; Steinke, Michael; McGenity, Terry; Loreto, Francesco

    2014-08-01

    This review summarizes the current understanding on plant and algal volatile organic compound (VOC) production and emission in extreme environments, where temperature, water availability, salinity or other environmental factors pose stress on vegetation. Here, the extreme environments include terrestrial systems, such as arctic tundra, deserts, CO₂ springs and wetlands, and marine systems such as sea ice, tidal rock pools and hypersaline environments, with mangroves and salt marshes at the land-sea interface. The emission potentials at fixed temperature and light level or actual emission rates for phototrophs in extreme environments are frequently higher than for organisms from less stressful environments. For example, plants from the arctic tundra appear to have higher emission potentials for isoprenoids than temperate species, and hypersaline marine habitats contribute to global dimethyl sulphide (DMS) emissions in significant amounts. DMS emissions are more widespread than previously considered, for example, in salt marshes and some desert plants. The reason for widespread VOC, especially isoprenoid, emissions from different extreme environments deserves further attention, as these compounds may have important roles in stress resistance and adaptation to extremes. Climate warming is likely to significantly increase VOC emissions from extreme environments both by direct effects on VOC production and volatility, and indirectly by altering the composition of the vegetation.

  3. Seasonal Variability of Precipitation Extremes in New York City

    Science.gov (United States)

    Polanco, W.

    2016-12-01

    Precipitation extremes can have very important impacts, and it is not known as to how precipitation extremes might change with global warming. New York City is located in the mid-latitude region where there are specific storms that can cause precipitation extremes, predominantly, hurricanes, extratropical cyclones, and quasi-linear convective systems. These storms preferentially occur during different seasons. Therefore, to understand how these different storms relate to precipitation extremes, this study examines NYC precipitation extremes per season. First, NOAA weather station data from January 1979 to December 2014 from the three NYC airports (JFK, LaGuardia and Newark) will be analyzed to derive the climatology, the counts of non-rain events, and the counts of extreme precipitation events. Next, a multi-station average will be used to compare the precipitation events that occur in Spring, Summer, and Fall. The precipitation strength will be compared as well as the temperature anomalies for each season. Then, using reanalysis, composites of the sea level pressure and temperature fields will be calculated for the top events from each season.

  4. Gravo-Aeroelastic Scaling for Extreme-Scale Wind Turbines

    Energy Technology Data Exchange (ETDEWEB)

    Fingersh, Lee J [National Renewable Energy Laboratory (NREL), Golden, CO (United States); Loth, Eric [University of Virginia; Kaminski, Meghan [University of Virginia; Qin, Chao [University of Virginia; Griffith, D. Todd [Sandia National Laboratories

    2017-06-09

    A scaling methodology is described in the present paper for extreme-scale wind turbines (rated at 10 MW or more) that allow their sub-scale turbines to capture their key blade dynamics and aeroelastic deflections. For extreme-scale turbines, such deflections and dynamics can be substantial and are primarily driven by centrifugal, thrust and gravity forces as well as the net torque. Each of these are in turn a function of various wind conditions, including turbulence levels that cause shear, veer, and gust loads. The 13.2 MW rated SNL100-03 rotor design, having a blade length of 100-meters, is herein scaled to the CART3 wind turbine at NREL using 25% geometric scaling and blade mass and wind speed scaled by gravo-aeroelastic constraints. In order to mimic the ultralight structure on the advanced concept extreme-scale design the scaling results indicate that the gravo-aeroelastically scaled blades for the CART3 are be three times lighter and 25% longer than the current CART3 blades. A benefit of this scaling approach is that the scaled wind speeds needed for testing are reduced (in this case by a factor of two), allowing testing under extreme gust conditions to be much more easily achieved. Most importantly, this scaling approach can investigate extreme-scale concepts including dynamic behaviors and aeroelastic deflections (including flutter) at an extremely small fraction of the full-scale cost.

  5. Assessment of Issue Handling Efficiency

    NARCIS (Netherlands)

    Luijten, B.; Visser, J.; Zaidman, A.

    2013-01-01

    We mined the issue database of GNOME to assess how issues are handled. How many issues are submitted and resolved? Does the backlog grow or decrease? How fast are issues resolved? Does issue resolution speed increase or decrease over time? In which subproject are issues handled most efficiently? To

  6. Assessment of Issue Handling Efficiency

    NARCIS (Netherlands)

    Luijten, B.; Visser, J.; Zaidman, A.

    2013-01-01

    We mined the issue database of GNOME to assess how issues are handled. How many issues are submitted and resolved? Does the backlog grow or decrease? How fast are issues resolved? Does issue resolution speed increase or decrease over time? In which subproject are issues handled most efficiently? To

  7. Analysis of WRF extreme daily precipitation over Alaska using self-organizing maps

    Science.gov (United States)

    Glisan, Justin M.; Gutowski, William J.; Cassano, John J.; Cassano, Elizabeth N.; Seefeldt, Mark W.

    2016-07-01

    We analyze daily precipitation extremes from simulations of a polar-optimized version of the Weather Research and Forecasting (WRF) model. Simulations cover 19 years and use the Regional Arctic System Model (RASM) domain. We focus on Alaska because of its proximity to the Pacific and Arctic oceans; both provide large moisture fetch inland. Alaska's topography also has important impacts on orographically forced precipitation. We use self-organizing maps (SOMs) to understand circulation characteristics conducive for extreme precipitation events. The SOM algorithm employs an artificial neural network that uses an unsupervised training process, which results in finding general patterns of circulation behavior. The SOM is trained with mean sea level pressure (MSLP) anomalies. Widespread extreme events, defined as at least 25 grid points experiencing 99th percentile precipitation, are examined using SOMs. Widespread extreme days are mapped onto the SOM of MSLP anomalies, indicating circulation patterns. SOMs aid in determining high-frequency nodes, and hence, circulations are conducive to extremes. Multiple circulation patterns are responsible for extreme days, which are differentiated by where extreme events occur in Alaska. Additionally, several meteorological fields are composited for nodes accessed by extreme and nonextreme events to determine specific conditions necessary for a widespread extreme event. Individual and adjacent node composites produce more physically reasonable circulations as opposed to composites of all extremes, which include multiple synoptic regimes. Temporal evolution of extreme events is also traced through SOM space. Thus, this analysis lays the groundwork for diagnosing differences in atmospheric circulations and their associated widespread, extreme precipitation events.

  8. Extreme morphologies of mantis shrimp larvae

    Directory of Open Access Journals (Sweden)

    Carolin Haug

    Full Text Available ABSTRACT Larvae of stomatopods (mantis shrimps are generally categorized into four larval types: antizoea, pseudozoea (both representing early larval stages, alima and erichthus (the latter two representing later larval stages. These categories, however, do not reflect the existing morphological diversity of stomatopod larvae, which is largely unstudied. We describe here four previously unknown larval types with extreme morphologies. All specimens were found in the collections of the Zoological Museum, University of Copenhagen and were collected during the Danish Dana Expedition round the world 1928-30. These new larval types all represent erichthus-type larvae, especially differing in their shield morphologies. The shield morphology ranges from almost spherical to rather disc-like, with sometimes extremely elongated spines, but only a general systematic assignment of the larvae was possible. Further investigations of these larvae are crucial to understand their life habits and ecological impact, especially as stomatopod and other crustacean larvae might have a much more important position in the marine ecosystems than their corresponding adults.

  9. Benchmark Generation and Simulation at Extreme Scale

    Energy Technology Data Exchange (ETDEWEB)

    Lagadapati, Mahesh [North Carolina State University (NCSU), Raleigh; Mueller, Frank [North Carolina State University (NCSU), Raleigh; Engelmann, Christian [ORNL

    2016-01-01

    The path to extreme scale high-performance computing (HPC) poses several challenges related to power, performance, resilience, productivity, programmability, data movement, and data management. Investigating the performance of parallel applications at scale on future architectures and the performance impact of different architectural choices is an important component of HPC hardware/software co-design. Simulations using models of future HPC systems and communication traces from applications running on existing HPC systems can offer an insight into the performance of future architectures. This work targets technology developed for scalable application tracing of communication events. It focuses on extreme-scale simulation of HPC applications and their communication behavior via lightweight parallel discrete event simulation for performance estimation and evaluation. Instead of simply replaying a trace within a simulator, this work promotes the generation of a benchmark from traces. This benchmark is subsequently exposed to simulation using models to reflect the performance characteristics of future-generation HPC systems. This technique provides a number of benefits, such as eliminating the data intensive trace replay and enabling simulations at different scales. The presented work features novel software co-design aspects, combining the ScalaTrace tool to generate scalable trace files, the ScalaBenchGen tool to generate the benchmark, and the xSim tool to assess the benchmark characteristics within a simulator.

  10. Extreme low temperature tolerance in woody plants

    Directory of Open Access Journals (Sweden)

    George Richard Strimbeck

    2015-10-01

    Full Text Available Woody plants in boreal to arctic environments and high mountains survive prolonged exposure to temperatures below -40˚C and minimum temperatures below -60˚C, and laboratory tests show that many of these species can also survive immersion in liquid nitrogen at -196˚C. Studies of biochemical changes that occur during acclimation, including recent proteomic and metabolomic studies, have identified changes in carbohydrate and compatible solute concentrations, membrane lipid composition, and proteins, notably dehydrins, that may have important roles in survival at extreme low temperature. Consideration of the biophysical mechanisms of membrane stress and strain lead to the following hypotheses for cellular and molecular mechanisms of survival at extreme low temperature: 1. Changes in lipid composition stabilize membranes at temperatures above the lipid phase transition temperature (-20 to 30˚C, preventing phase changes that result in irreversible injury. 2. High concentrations of oligosaccharides promote vitrification or high viscosity in the cytoplasm in freeze-dehydrated cells, which would prevent deleterious interactions between membranes. 3. Dehydrins bind membranes and further promote vitrification or act stearically to prevent membrane-membrane interactions.

  11. Research Article Special Issue

    African Journals Online (AJOL)

    2016-05-15

    May 15, 2016 ... entity which has various aims and uses various designs and plans to ... which exists in distribution systems, the possibility of error detection and its restoration .... To examine the issue of mobile agents security, two concepts ...

  12. Gambling: A Consumer Issue?

    Science.gov (United States)

    Makela, Carole J.; Tucker, Suzanne

    1993-01-01

    Focuses upon gambling, the twelfth largest industry in the United States, and its impact on families. Discusses the history of gambling, the cost of gambling, and the growth of lotteries. Suggests issues for consumer professionals to explore. (JOW)

  13. Pregnancy and Reproductive Issues

    Science.gov (United States)

    ... Relationships Pregnancy Share this page Facebook Twitter Email Pregnancy and Reproductive Issues Tahirah Diagnosed in 2003 Pregnancy ... in control groups without the disease. Effects of pregnancy on MS Before 1950, most women with MS ...

  14. Environmental Compliance Issue Coordination

    Science.gov (United States)

    An order to establish the Department of Energy (DOE) requirements for coordination of significant environmental compliance issues to ensure timely development and consistent application of Departmental environmental policy and guidance

  15. Ethical issues in immunisation.

    Science.gov (United States)

    Isaacs, David; Kilham, Henry; Leask, Julie; Tobin, Bernadette

    2009-01-29

    Discussions about current and future immunisation programmes raise novel questions about familiar ethical issues. Two sets of ethical issues dominate these discussions. The first is the issue of compulsory immunisation: what should be done about parents who fail to immunise their children? The second is: given competing demands on health care budgets, how should principles of justice in access and distribution inform vaccination programmes? This paper considers these two issues in the light of traditional ethical principles. With respect to the first, we argue that compulsion is justified only in cases in which we know with practical certainty that parental failure to immunise puts their own child or other children at high risk of severe illness. We also argue that the state should compensate those who suffer vaccine-related injury. With respect to the second, we claim that allocating resources according to health care need requires establishing priorities between public health programmes such as immunisation and other treatment programmes.

  16. Medical Issues: Nutrition

    Science.gov (United States)

    ... support & care > living with sma > medical issues > nutrition Nutrition Good nutrition is essential to health and growth. ... must make decisions based on their own needs. Nutrition Considerations Since we are still waiting for clinical ...

  17. Osteogenesis Imperfecta Issues: Constipation

    Science.gov (United States)

    OI Issues: Constipation 804 W. Diamond Ave., Ste. 210 Gaithersburg, MD 20878 (800) 981-2663 (301) 947-0083 Fax: (301) 947- ... a cure, education, awareness, and mutual support. Introduction Constipation is a problem for some people with osteogenesis ...

  18. Extreme weather: Subtropical floods and tropical cyclones

    Science.gov (United States)

    Shaevitz, Daniel A.

    Extreme weather events have a large effect on society. As such, it is important to understand these events and to project how they may change in a future, warmer climate. The aim of this thesis is to develop a deeper understanding of two types of extreme weather events: subtropical floods and tropical cyclones (TCs). In the subtropics, the latitude is high enough that quasi-geostrophic dynamics are at least qualitatively relevant, while low enough that moisture may be abundant and convection strong. Extratropical extreme precipitation events are usually associated with large-scale flow disturbances, strong ascent, and large latent heat release. In the first part of this thesis, I examine the possible triggering of convection by the large-scale dynamics and investigate the coupling between the two. Specifically two examples of extreme precipitation events in the subtropics are analyzed, the 2010 and 2014 floods of India and Pakistan and the 2015 flood of Texas and Oklahoma. I invert the quasi-geostrophic omega equation to decompose the large-scale vertical motion profile to components due to synoptic forcing and diabatic heating. Additionally, I present model results from within the Column Quasi-Geostrophic framework. A single column model and cloud-revolving model are forced with the large-scale forcings (other than large-scale vertical motion) computed from the quasi-geostrophic omega equation with input data from a reanalysis data set, and the large-scale vertical motion is diagnosed interactively with the simulated convection. It is found that convection was triggered primarily by mechanically forced orographic ascent over the Himalayas during the India/Pakistan flood and by upper-level Potential Vorticity disturbances during the Texas/Oklahoma flood. Furthermore, a climate attribution analysis was conducted for the Texas/Oklahoma flood and it is found that anthropogenic climate change was responsible for a small amount of rainfall during the event but the

  19. Life at extreme limits: the anaerobic halophilic alkalithermophiles.

    Science.gov (United States)

    Mesbah, Noha M; Wiegel, Juergen

    2008-03-01

    The ability of anaerobic microorganisms to proliferate under extreme conditions is of widespread importance for microbial physiology, remediation, industry, and evolution. The halophilic alkalithermophiles are a novel group of polyextremophiles. Tolerance to alkaline pH, elevated NaCl concentrations, and high temperatures necessitates mechanisms for cytoplasmic pH acidification; permeability control of the cell membrane; and stability of proteins, the cell wall, and other cellular constituents to multiple extreme conditions. Although it is generally assumed that extremophiles growing at more than one extreme combine adaptive mechanisms for each individual extreme, adaptations for individual extremes often counteract each other. However, in alkaline, hypersaline niches heated via intense solar irradiation, culture-independent analyses have revealed the presence of an extensive diversity of aerobic and anaerobic microorganisms belonging to Bacteria and Archaea that survive and grow under multiple harsh conditions. Thus, polyextremophiles must have developed novel adaptive strategies enabling them to grow and proliferate under multiple extreme conditions. The recent isolation of two novel anaerobic, halophilic alkalithermophiles, Natranaerobius thermophilus and Halonatronum saccharophilum, will provide a platform for detailed biochemical, genomic, and proteomic experiments, allowing a greater understanding of the novel adaptive mechanisms undoubtedly employed by polyextremophiles. In this review, we highlight growth characteristics, ecology, and phylogeny of the anaerobic halophilic alkalithermophiles isolated. We also describe the bioenergetic and physiological problems posed by growth at the multiple extreme conditions of alkaline pH, high NaCl concentration, and elevated temperature under anoxic conditions and highlight recent findings and unresolved problems regarding adaptation to multiple extreme conditions.

  20. Structure of personality and motivation of extreme sports athletes

    Directory of Open Access Journals (Sweden)

    Jana Mahnič

    2005-09-01

    Full Text Available The purpose of research was to define the eventual differences between personal and motivational structure among extreme sports athletes and non-athletes. Beside personal and motivational structure of both mentioned groups, we also examined state and trait anxiety as significant factors of success. We used a medium lengthy version of FPI inventory, Costell's questionnaire of achievement motivation and Spielberg's questionnaire STAI – X1 and STAI – X2. The pattern included 66 extreme sports athletes. We concluded that extreme sports athletes are significantly less suppressed and sincere, whereas they are more extrovert and masculine in comparison with the group of non-athletes. A trend that individuals, who reach for extreme sports, are more sociable, and less neurotic is pointed out, but it is not of significant importance. We found out that there is also a tendency that extreme sports athletes express more positive achievement motivation than non-athletes, who on the other hand express significantly higher negative achievement motivation. The analysis of anxiety differences on the other hand showed that extreme sports athletes have significantly lower state of anxiety and the anxiety itself as atrait is far less visible, but the difference did not appear as significant. The results however did not confirme previous studies' findings. Nevertheless they serve as a contribution to some earlier findings and suggest that extreme sports athletes are a special group, which differs from non-athlete population in both personal and motivational structure and relatively well suits to the profile of a top athlete. At the same time, the present research offers a possibility of shaping an extreme sports athlete's profile.

  1. Probability distribution analysis of observational extreme events and model evaluation

    Science.gov (United States)

    Yu, Q.; Lau, A. K. H.; Fung, J. C. H.; Tsang, K. T.

    2016-12-01

    Earth's surface temperatures were the warmest in 2015 since modern record-keeping began in 1880, according to the latest study. In contrast, a cold weather occurred in many regions of China in January 2016, and brought the first snowfall to Guangzhou, the capital city of Guangdong province in 67 years. To understand the changes of extreme weather events as well as project its future scenarios, this study use statistical models to analyze on multiple climate data. We first use Granger-causality test to identify the attribution of global mean temperature rise and extreme temperature events with CO2 concentration. The four statistical moments (mean, variance, skewness, kurtosis) of daily maximum temperature distribution is investigated on global climate observational, reanalysis (1961-2010) and model data (1961-2100). Furthermore, we introduce a new tail index based on the four moments, which is a more robust index to measure extreme temperatures. Our results show that the CO2 concentration can provide information to the time series of mean and extreme temperature, but not vice versa. Based on our new tail index, we find that other than mean and variance, skewness is an important indicator should be considered to estimate extreme temperature changes and model evaluation. Among the 12 climate model data we investigate, the fourth version of Community Climate System Model (CCSM4) from National Center for Atmospheric Research performs well on the new index we introduce, which indicate the model have a substantial capability to project the future changes of extreme temperature in the 21st century. The method also shows its ability to measure extreme precipitation/ drought events. In the future we will introduce a new diagram to systematically evaluate the performance of the four statistical moments in climate model output, moreover, the human and economic impacts of extreme weather events will also be conducted.

  2. Sustainability issues in civil engineering

    CERN Document Server

    Saride, Sireesh; Basha, B

    2017-01-01

    This compilation on sustainability issues in civil engineering comprises contributions from international experts who have been working in the area of sustainability in civil engineering. Many of the contributions have been presented as keynote lectures at the International Conference on Sustainable Civil Infrastructure (ICSCI) held in Hyderabad, India. The book has been divided into core themes of Sustainable Transportation Systems, Sustainable Geosystems, Sustainable Environmental and Water Resources and Sustainable Structural Systems. Use of sustainability principles in engineering has become an important component of the process of design and in this context, design and analysis approaches in civil engineering are being reexamined to incorporate the principles of sustainable designs and construction in practice. Developing economies are on the threshold of rapid infrastructure growth and there is a need to compile the developments in various branches of civil engineering and highlight the issues. It is th...

  3. The concept and relevance of existential issues in nursing.

    Science.gov (United States)

    Udo, Camilla

    2014-08-01

    The aim of this study was to illuminate and clarify the concept of existential issues in relation to nursing research and nursing practice. This article is a theoretical analysis of existential issues in relation to nursing. Existential issues are becoming more commonly discussed and investigated in nursing research. Thus, it is important to clarify the concept. A clarification of existential issues may contribute to health care quality by increasing awareness of what existential issues are and drawing attention to the importance of discussing and reflecting on these issues, since practitioners in a caring profession will most likely encounter them. Copyright © 2014 Elsevier Ltd. All rights reserved.

  4. Debt Issues and Earnings Management

    Directory of Open Access Journals (Sweden)

    Bianca Piloto Sincerre

    2016-01-01

    Full Text Available ABSTRACT The aim of this paper is to analyze earnings management (EM surrounding debenture issues of companies listed on the BM&FBOVESPA. EM is an intentional intervention in external financial reports in order to obtain some private gain. This practice is especially important at the time of issuing debentures because if earnings are inflated, investors may pay an artificially high price. To measure earnings management, current discretionary accruals were used as a proxy, based on the Modified Jones and Modified Jones with ROA econometric models. All of the regressions considered the fixed effects of the companies and the time series effects of the analyses. Evidence was found that companies inflate their financial results in the issuing period in order to positively influence their investors. The results suggest that there is EM in the quarter preceding the issue (t = - 1, indicating the influence that investors may have been under when making the decision to invest in debentures from these companies. In addition, it was verified that companies with higher debt, profitability, and sales growth ratios have higher levels of earnings management. The reputation of the auditor was not statistically significant regarding reductions in the level of management. The results also show that companies listed on Level II and New Market had higher levels of management when considering the Modified Jones with ROA model. Therefore, it can be concluded that there is a greater level of earnings management in companies that issue debentures in the period preceding the event. Finally, the variable that is directly related to the level of earnings management is sales growth.

  5. Outcomes for Extremely Premature Infants

    Science.gov (United States)

    Glass, Hannah C.; Costarino, Andrew T.; Stayer, Stephen A.; Brett, Claire; Cladis, Franklyn; Davis, Peter J.

    2015-01-01

    Premature birth is a significant cause of infant and child morbidity and mortality. In the United States, the premature birth rate, which had steadily increased during the 1990s and early 2000s, has decreased annually for four years and is now approximately 11.5%. Human viability, defined as gestational age at which the chance of survival is 50%, is currently approximately 23–24 weeks in developed countries. Infant girls, on average, have better outcomes than infant boys. A relatively uncomplicated course in the intensive care nursery for an extremely premature infant results in a discharge date close to the prenatal EDC. Despite technological advances and efforts of child health experts during the last generation, the extremely premature infant (less than 28 weeks gestation) and extremely low birth weight infant (ELBW) (premature labor improved neonatal mortality and morbidity in the late 1990s. The recognition that chronic postnatal administration of steroids to infants should be avoided may have improved outcomes in the early 2000s. Evidence from recent trials attempting to define the appropriate target for oxygen saturation in preterm infants suggests arterial oxygen saturation between 91–95% (compared to 85–89%) avoids excess mortality. However, final analyses of data from these trials have not been published, so definitive recommendations are still pending The development of neonatal neurocognitive care visits may improve neurocognitive outcomes in this high-risk group. Long-term follow up to detect and address developmental, learning, behavioral, and social problems is critical for children born at these early gestational ages. The striking similarities in response to extreme prematurity in the lung and brain imply that agents and techniques that benefit one organ are likely to also benefit the other. Finally, since therapy and supportive care continue to change, the outcomes of ELBW infants are ever evolving. Efforts to minimize injury, preserve

  6. Gravity and Extreme Magnetism SMEX

    Science.gov (United States)

    2012-01-01

    The Gravity and Extreme Magnetism SMEX mission will be the first mission to catalogue the X-ray polarisation of many astrophysical objects including black-holes and pulsars. This first of its kind mission is enabled by the novel use of a time projection chamber as an X-ray polarimeter. The detector has been developed over the last 5 years, with the current effort charged toward a demonstration of it's technical readiness to be at level 6 prior to the preliminary design review. This talk will describe the design GEMS polarimeter and the results to date from the engineering test unit.

  7. Communication path for extreme environments

    Science.gov (United States)

    Jorgensen, Charles C. (Inventor); Betts, Bradley J. (Inventor)

    2010-01-01

    Methods and systems for using one or more radio frequency identification devices (RFIDs), or other suitable signal transmitters and/or receivers, to provide a sensor information communication path, to provide location and/or spatial orientation information for an emergency service worker (ESW), to provide an ESW escape route, to indicate a direction from an ESW to an ES appliance, to provide updated information on a region or structure that presents an extreme environment (fire, hazardous fluid leak, underwater, nuclear, etc.) in which an ESW works, and to provide accumulated thermal load or thermal breakdown information on one or more locations in the region.

  8. Ionization Chamber Measures Extreme Ultraviolet

    Science.gov (United States)

    Carlson, Robert W.

    1987-01-01

    Ionization chamber operates in nearly total photon absorption as stable, self-calibrating detector of ionizing extreme ultraviolet radiation. Working gas of instrument is neon; photoionization properties well known and readily applicable to absolute measurements. Designed for measurements of solar ultraviolet flux aboard sounding rocket, instrument used on Earth to measure ultraviolet radiation in vacuum systems. Ionization chamber collects positive neon ions and electrons produced by irradiation of neon gas by ultraviolet photons. Approximately one ion produced by each photon; consequently, photoionization current nearly proportional to photon flux.

  9. Extreme Geomagnetic Storms - 1868 - 2010

    Science.gov (United States)

    Vennerstrom, S.; Lefevre, L.; Dumbović, M.; Crosby, N.; Malandraki, O.; Patsou, I.; Clette, F.; Veronig, A.; Vršnak, B.; Leer, K.; Moretto, T.

    2016-05-01

    We present the first large statistical study of extreme geomagnetic storms based on historical data from the time period 1868 - 2010. This article is the first of two companion papers. Here we describe how the storms were selected and focus on their near-Earth characteristics. The second article presents our investigation of the corresponding solar events and their characteristics. The storms were selected based on their intensity in the aa index, which constitutes the longest existing continuous series of geomagnetic activity. They are analyzed statistically in the context of more well-known geomagnetic indices, such as the Kp and Dcx/Dst index. This reveals that neither Kp nor Dcx/Dst provide a comprehensive geomagnetic measure of the extreme storms. We rank the storms by including long series of single magnetic observatory data. The top storms on the rank list are the New York Railroad storm occurring in May 1921 and the Quebec storm from March 1989. We identify key characteristics of the storms by combining several different available data sources, lists of storm sudden commencements (SSCs) signifying occurrence of interplanetary shocks, solar wind in-situ measurements, neutron monitor data, and associated identifications of Forbush decreases as well as satellite measurements of energetic proton fluxes in the near-Earth space environment. From this we find, among other results, that the extreme storms are very strongly correlated with the occurrence of interplanetary shocks (91 - 100 %), Forbush decreases (100 %), and energetic solar proton events (70 %). A quantitative comparison of these associations relative to less intense storms is also presented. Most notably, we find that most often the extreme storms are characterized by a complexity that is associated with multiple, often interacting, solar wind disturbances and that they frequently occur when the geomagnetic activity is already elevated. We also investigate the semiannual variation in storm occurrence

  10. Advances in upper extremity prosthetics.

    Science.gov (United States)

    Zlotolow, Dan A; Kozin, Scott H

    2012-11-01

    Until recently, upper extremity prostheses had changed little since World War II. In 2006, the Defense Advanced Research Projects Agency responded to an increasing number of military amputees with the Revolutionizing Prosthetics program. The program has yielded several breakthroughs both in the engineering of new prosthetic arms and in the control of those arms. Direct brain-wave control of a limb with 22° of freedom may be within reach. In the meantime, advances such as individually powered digits have opened the door to multifunctional full and partial hand prostheses. Restoring sensation to the prosthetic limb remains a major challenge to full integration of the limb into a patient's self-image.

  11. Conflict management: importance and implications.

    Science.gov (United States)

    McKibben, Laurie

    2017-01-26

    Conflict is a consistent and unavoidable issue within healthcare teams. Despite training of nurse leaders and managers around areas of conflict resolution, the problem of staff relations, stress, sickness and retention remain. Conflict arises from issues with interpersonal relationships, change and poor leadership. New members of staff entering an already established healthcare team should be supported and integrated, to encourage mutual role respect between all team members and establish positive working relationships, in order to maximise patient care. This paper explores the concept of conflict, the importance of addressing causes of conflict, effective management, and the relevance of positive approaches to conflict resolution. Good leadership, nurturing positive team dynamics and communication, encourages shared problem solving and acceptance of change. Furthermore mutual respect fosters a more positive working environment for those in healthcare teams. As conflict has direct implications for patients, positive resolution is essential, to promote safe and effective delivery of care, whilst encouraging therapeutic relationships between colleagues and managers.

  12. Preface: Impacts of extreme climate events and disturbances on carbon dynamics

    Science.gov (United States)

    Xiao, Jingfeng; Liu, Shuguang; Stoy, Paul C.

    2016-06-01

    The impacts of extreme climate events and disturbances (ECE&D) on the carbon cycle have received growing attention in recent years. This special issue showcases a collection of recent advances in understanding the impacts of ECE&D on carbon cycling. Notable advances include quantifying how harvesting activities impact forest structure, carbon pool dynamics, and recovery processes; observed drastic increases of the concentrations of dissolved organic carbon and dissolved methane in thermokarst lakes in western Siberia during a summer warming event; disentangling the roles of herbivores and fire on forest carbon dioxide flux; direct and indirect impacts of fire on the global carbon balance; and improved atmospheric inversion of regional carbon sources and sinks by incorporating disturbances. Combined, studies herein indicate several major research needs. First, disturbances and extreme events can interact with one another, and it is important to understand their overall impacts and also disentangle their effects on the carbon cycle. Second, current ecosystem models are not skillful enough to correctly simulate the underlying processes and impacts of ECE&D (e.g., tree mortality and carbon consequences). Third, benchmark data characterizing the timing, location, type, and magnitude of disturbances must be systematically created to improve our ability to quantify carbon dynamics over large areas. Finally, improving the representation of ECE&D in regional climate/earth system models and accounting for the resulting feedbacks to climate are essential for understanding the interactions between climate and ecosystem dynamics.

  13. Mitigating the Risk of Extreme Water Scarcity and Dependency: The Case of Jordan

    Directory of Open Access Journals (Sweden)

    Joep F. Schyns

    2015-10-01

    Full Text Available Jordan faces great internal water scarcity and pollution, conflict over trans-boundary waters, and strong dependency on external water resources through trade. This paper analyzes these issues and subsequently reviews options to reduce the risk of extreme water scarcity and dependency. Based on estimates of water footprint, water availability, and virtual water trade, we find that groundwater consumption is nearly double the groundwater availability, water pollution aggravates blue water scarcity, and Jordan’s external virtual water import dependency is 86%. The review of response options yields 10 ingredients for a strategy for Jordan to mitigate the risks of extreme water scarcity and dependency. With respect to these ingredients, Jordan’s current water policy requires a strong redirection towards water demand management. Actual implementation of the plans in the national water strategy (against existing oppositions would be a first step. However, more attention should be paid to reducing water demand by changing the consumption pattern of Jordanian consumers. Moreover, unsustainable exploitation of the fossil Disi aquifer should soon be halted and planned desalination projects require careful consideration regarding the sustainability of their energy supply.

  14. Fewer rainy days and more extreme rainfall by the end of the century in Southern Africa

    Science.gov (United States)

    Pohl, Benjamin; Macron, Clémence; Monerie, Paul-Arthur

    2017-04-01

    Future changes in the structure of daily rainfall, especially the number of rainy days and the intensity of extreme events, are likely to induce major impacts on rain-fed agriculture in the tropics. In Africa this issue is of primary importance, but the agreement between climate models to simulate such descriptors of rainfall is generally poor. Here, we show that the climate models used for the fifth assessment report of IPCC simulate a marked decrease in the number of rainy days, together with a strong increase in the rainfall amounts during the 1% wettest days, by the end of the 21st century over Southern Africa. These combined changes lead to an apparent stability of seasonal totals, but are likely to alter the quality of the rainy season. These evolutions are due to the superposition of slowly-changing moisture fluxes, mainly supported by increased hygrometric capacity associated with global warming, and unchanged short-term atmospheric configurations in which extreme events are embedded. This could cause enhanced floods or droughts, stronger soil erosion and nutriment loss, questioning the sustainability of food security for the 300 million people currently living in Africa south of the Equator.

  15. Application of RFID technology-upper extremity rehabilitation training.

    Science.gov (United States)

    Chen, Chih-Chen; Chen, Yu-Luen; Chen, Shih-Ching

    2016-01-01

    [Purpose] Upper extremity rehabilitation after an injury is very important. This study proposes radio frequency identification (RFID) technology to improve and enhance the effectiveness of the upper extremity rehabilitation. [Subjects and Methods] People use their upper extremities to conduct daily activities. When recovering from injuries, many patients neglect the importance of rehabilitation, which results in degraded function. This study recorded the training process using the traditional rehabilitation hand gliding cart with a RFID reader, RFID tags in the panel, and a servo host computer. [Results] Clinical evidence, time taken to achieve a full score, counts of missing the specified spots, and Brunnstrom stage of aided recovery, the proximal part of the upper extremity show that the RFID-based upper extremity training significantly and reduce negative impacts of the disability in daily life and activities. [Conclusion] This study combined a hand-gliding cart with an RFID reader, and when patients moved the cart, the movement could be observed via the activated RFID tags. The training data was collected and quantified for a better understanding of the recovery status of the patients. Each of the participating patients made progress as expected.

  16. Assessing the extreme overwash regime along an embayed urban beach

    Science.gov (United States)

    Silveira, Tanya M.; Taborda, Rui; Carapuço, Mafalda M.; Andrade, César; Freitas, Maria C.; Duarte, João F.; Psuty, Norbert P.

    2016-12-01

    Coastal overwash is one of the most important hazards affecting the coastal zone and therefore has been the focus of several studies related to the establishment of setback lines. However, studies of extreme overwash (EO) events along urban beaches backed by a seawall or structure are scarce, and reveal the difficulties associated with its assessment, measurement and validation. The Nazaré coastal urban area (located on the west coast of Portugal) is developed adjacent to an embayed reflective beach and is subject to frequent and localized inundation due to EO events capable of overtopping the protection seawall. The current work develops a methodological approach to simulate total water levels (TWL) and seawall overtopping occurrences in time and space, with the ultimate goal of identifying the factors that govern the extreme overwash regime. The method uses multi-decadal time series of site-specific wave and tide, and high-resolution topo-bathymetric data, and recreates the TWL time series for a 36-year period. The model is successfully validated against video imagery and maximum swash line data that provide information on the reach of the water levels measured during modal and extreme TWL conditions along the studied beach. This study establishes the importance of the interaction of the modal and extreme hydrodynamic processes with the beach and backshore morphology. The Nazaré embayment is in equilibrium with the alongshore-varying modal wave conditions, resulting in higher vulnerability of the most sheltered sector during extreme events.

  17. Prevention of Lower Extremity Injuries in Basketball

    OpenAIRE

    2015-01-01

    Context: Lower extremity injuries are common in basketball, yet it is unclear how prophylactic interventions affect lower extremity injury incidence rates. Objective: To analyze the effectiveness of current lower extremity injury prevention programs in basketball athletes, focusing on injury rates of (1) general lower extremity injuries, (2) ankle sprains, and (3) anterior cruciate ligament (ACL) tears. Data Sources: PubMed, MEDLINE, CINAHL, SPORTDiscus, and the Cochrane Register of Controlle...

  18. Dancing with Nature: Rhythm and Harmony in Extreme Sport Participation

    Science.gov (United States)

    Brymer, Eric; Gray, Tonia

    2009-01-01

    Research on extreme sports has downplayed the importance of the athletes' connection to the natural world. This neglect stems, in part, from the assumption that these activities derive their meaning primarily from risk. The authors' long-term research reveals that the interplay between adventure athletes and the natural world is, in fact, crucial…

  19. Robot-aided assessment of lower extremity functions: a review

    NARCIS (Netherlands)

    Maggioni, S.; Melendez-Calderon, A.; Asseldonk, van E.H.F.; Klamroth-Marganska, V.; Lünenburger, L.; Riener, R.; Kooij, van der H.

    2016-01-01

    The assessment of sensorimotor functions is extremely important to understand the health status of a patient and its change over time. Assessments are necessary to plan and adjust the therapy in order to maximize the chances of individual recovery. Nowadays, however, assessments are seldom used in c

  20. Ischemic pain in the extremities and Raynaud's phenomenon.

    NARCIS (Netherlands)

    Devulder, J.; Suijlekom, H. van; Dongen, R.T.M. van; Diwan, S.; Mekhail, N.; Kleef, M. van; Huygen, F.

    2011-01-01

    Two important groups of disorders result from an insufficient blood supply to the extremities: critical vascular disease and the Raynaud's phenomenon. The latter can be subdivided into a primary and a secondary type. Critical ischemic disease is often caused by arteriosclerosis due to hypertension o

  1. Dynamics of extremal black holes

    CERN Document Server

    Giddings, Steven B

    1992-01-01

    Particle scattering and radiation by a magnetically charged, dilatonic black hole is investigated near the extremal limit at which the mass is a constant times the charge. Near this limit a neighborhood of the horizon of the black hole is closely approximated by a trivial product of a two-dimensional black hole with a sphere. This is shown to imply that the scattering of long-wavelength particles can be described by a (previously analyzed) two-dimensional effective field theory, and is related to the formation/evaporation of two-dimensional black holes. The scattering proceeds via particle capture followed by Hawking re-emission, and naively appears to violate unitarity. However this conclusion can be altered when the effects of backreaction are included. Particle-hole scattering is discussed in the light of a recent analysis of the two-dimensional backreaction problem. It is argued that the quantum mechanical possibility of scattering off of extremal black holes implies the potential existence of additional ...

  2. EXTREMAL CONTROL FOR PHOTOVOLTAIC PANELS

    Directory of Open Access Journals (Sweden)

    Genevieve DAPHIN TANGUY

    2016-11-01

    Full Text Available In this paper a methodology for extremal control of photovoltaic panels has been designed through the use of an embedded polynomial controller using robust approaches and algorithms. Also, a framework for testing solar trackers in a hard ware in the loop (HIL configuration has been established. Efficient gradient based optimization methods were put in place in order to determine the parameters of the employed photovoltaic panel, as well as for computing the Maximum Power Point (MPP. Further a numerical RST controller has been computed in order to allow the panel to follow the movement of the sun to obtain a maximum energetic efficiency. A robustness analysis and correction procedure has been done on the RST polynomial algorithm. The hardware in the loop configuration allows for the development of a test and development platform which can be used for bringing improvements to the current design and also test different control approaches. For this, a microcontroller based solution was chosen. The achieved performances of the closed loop photovoltaic panel (PP system are validated in simulation using the MATLAB / SIMULINK environment and the WinPim & WinReg dedicated software. As it will be seen further in this paper, the extremal control of this design resides in a sequential set of computations used for obtaining the new Maximum Power Point at each change in the system.

  3. Structural safety in case of extreme actions

    DEFF Research Database (Denmark)

    Giuliani, Luisa

    2012-01-01

    for the assessment or the achievement of the structural integrity of constructions. The term structural integrity is intended here as the ability of the structure to sustain extreme actions that directly affects its system without developing a major collapse. In this paper two main methods are outlined....... The use of the first approach is proposed for assessing, by means of a set of nonlinear static analyses, the robustness of structural systems, intended as the ability of a structure to sustain local failure (Starossek, 2009) without developing a major collapse.......The behaviour of buildings and other constructions under critical events is widely recognised to be an important part of structural design. Still, the problem is often addressed in a qualitative way by many current codes and regulations and designers cannot refer to specific methodologies...

  4. A parallel workload has extreme varibility

    CERN Document Server

    Henwood, R; Chapman, S C; McLay, R

    2016-01-01

    In both high-performance computing (HPC) environments and the public cloud, the duration of time to retrieve or save your results is simultaneously unpredictable and important to your over all resource budget. It is generally accepted ("Google: Taming the Long Latency Tail - When More Machines Equals Worse Results", Todd Hoff, highscalability.com 2012), but without a robust explanation, that identical parallel tasks do take different durations to complete -- a phenomena known as variability. This paper advances understanding of this topic. We carefully choose a model from which system-level complexity emerges that can be studied directly. We find that a generalized extreme value (GEV) model for variability naturally emerges. Using the public cloud, we find real-world observations have excellent agreement with our model. Since the GEV distribution is a limit distribution this suggests a universal property of parallel systems gated by the slowest communication element of some sort. Hence, this model is applicab...

  5. Limitations of Extreme Nonlinear Ultrafast Nanophotonics

    Directory of Open Access Journals (Sweden)

    Kern Christian

    2015-01-01

    Full Text Available High-harmonic generation (HHG has been established as an indispensable tool in optical spectroscopy. This effect arises for instance upon illumination of a noble gas with sub-picosecond laser pulses at focussed intensities significantly greater than 1012W/cm2. HHG provides a coherent light source in the extreme ultraviolet (XUV spectral region, which is of importance in inner shell photo ionization of many atoms and molecules. Additionally, it intrinsically features light fields with unique temporal properties. Even in its simplest realization, XUV bursts of sub-femtosecond pulse lengths are released. More sophisticated schemes open the path to attosecond physics by offering single pulses of less than 100 attoseconds duration.

  6. Why are some galaxy disks extremely thin?

    CERN Document Server

    Banerjee, Arunima

    2012-01-01

    Some low surface brightness galaxies are known to have extremely thin stellar disks with the vertical to planar axes ratio 0.1 or less, often referred to as superthin disks. Although their existence is known for over three decades, the physical origin for the thin distribution is not understood. We model the stellar thickness for a two-component (gravitationally coupled stars and gas) disk embedded in a dark matter halo, for a superthin galaxy UGC 7321 which has a dense, compact halo, and compare with a typical dwarf galaxy HoII which has a non-compact halo. We show that while the presence of gas does constrain the disk thickness, it is the compact dark matter halo which plays the decisive role in determining the superthin disk distribution in low-mass disks. Thus the compact dark matter halo significantly affects the disk structure and this could be important for the early evolution of galaxies.

  7. A European precipitation index for extreme rain-storm and flash flood early warning

    OpenAIRE

    ALFIERI LORENZO; THIELEN DEL POZO Jutta

    2012-01-01

    Extreme rain-storms are known for triggering devastating flash floods in various regions of Europe and particularly along the Mediterranean coasts. Despite recent notable advances in weather forecasting, most operational early warning systems for extreme rainstorms and flash floods are based on rainfall estimation, rather than on forecasts. As a result, warning lead times are bounded to few hours and warnings are usually issued when the event is already taking place. This work proposes a n...

  8. Eukaryotic Organisms in Extreme Acidic Environments, the Río Tinto Case

    OpenAIRE

    Angeles Aguilera

    2013-01-01

    A major issue in microbial ecology is to identify the limits of life for growth and survival, and to understand the molecular mechanisms that define these limits. Thus, interest in the biodiversity and ecology of extreme environments has grown in recent years for several reasons. Some are basic and revolve around the idea that extreme environments are believed to reflect early Earth conditions. Others are related to the biotechnological potential of extremophiles. In this regard, the study of...

  9. Smart homes design, implementation and issues

    CERN Document Server

    Suryadevara, Nagender Kumar

    2015-01-01

    The book addresses issues towards the design and development of Wireless Sensor Network based Smart Home and fusion of Real-Time Data for Wellness Determination of an elderly person living alone in a Smart Home. The fundamentals of selection of sensor, fusion of sensor data, system design, modelling, characterizations, experimental investigations and analyses have been covered. This book will be extremely useful for the engineers and researchers especially higher undergraduate, postgraduate students as well as practitioners working on the development of Wireless Sensor Networks, Internet of Things and Data Mining.

  10. Idiopathic environmental intolerance: case definition issues.

    Science.gov (United States)

    Kreutzer, R

    2000-01-01

    Case definitions of the same phenomenon may be different for different purposes. Case definitions usually become more specific over time as more information about the condition becomes available. Idiopathic environmental intolerance is one of many labels for a heterogeneous group of conditions in which subjects describe multiple symptoms that are attributed to exposure to extremely low doses of common chemicals. Dr. Kreutzer presents issues in case definition for clinical purposes and for population-based studies, and makes recommendations for the clinician and for the public health investigator.

  11. Plasma physics of extreme astrophysical environments.

    Science.gov (United States)

    Uzdensky, Dmitri A; Rightley, Shane

    2014-03-01

    Among the incredibly diverse variety of astrophysical objects, there are some that are characterized by very extreme physical conditions not encountered anywhere else in the Universe. Of special interest are ultra-magnetized systems that possess magnetic fields exceeding the critical quantum field of about 44 TG. There are basically only two classes of such objects: magnetars, whose magnetic activity is manifested, e.g., via their very short but intense gamma-ray flares, and central engines of supernovae (SNe) and gamma-ray bursts (GRBs)--the most powerful explosions in the modern Universe. Figuring out how these complex systems work necessarily requires understanding various plasma processes, both small-scale kinetic and large-scale magnetohydrodynamic (MHD), that govern their behavior. However, the presence of an ultra-strong magnetic field modifies the underlying basic physics to such a great extent that relying on conventional, classical plasma physics is often not justified. Instead, plasma-physical problems relevant to these extreme astrophysical environments call for constructing relativistic quantum plasma (RQP) physics based on quantum electrodynamics (QED). In this review, after briefly describing the astrophysical systems of interest and identifying some of the key plasma-physical problems important to them, we survey the recent progress in the development of such a theory. We first discuss the ways in which the presence of a super-critical field modifies the properties of vacuum and matter and then outline the basic theoretical framework for describing both non-relativistic and RQPs. We then turn to some specific astrophysical applications of relativistic QED plasma physics relevant to magnetar magnetospheres and to central engines of core-collapse SNe and long GRBs. Specifically, we discuss the propagation of light through a magnetar magnetosphere; large-scale MHD processes driving magnetar activity and responsible for jet launching and propagation in

  12. Plasma physics of extreme astrophysical environments

    Science.gov (United States)

    Uzdensky, Dmitri A.; Rightley, Shane

    2014-03-01

    Among the incredibly diverse variety of astrophysical objects, there are some that are characterized by very extreme physical conditions not encountered anywhere else in the Universe. Of special interest are ultra-magnetized systems that possess magnetic fields exceeding the critical quantum field of about 44 TG. There are basically only two classes of such objects: magnetars, whose magnetic activity is manifested, e.g., via their very short but intense gamma-ray flares, and central engines of supernovae (SNe) and gamma-ray bursts (GRBs)—the most powerful explosions in the modern Universe. Figuring out how these complex systems work necessarily requires understanding various plasma processes, both small-scale kinetic and large-scale magnetohydrodynamic (MHD), that govern their behavior. However, the presence of an ultra-strong magnetic field modifies the underlying basic physics to such a great extent that relying on conventional, classical plasma physics is often not justified. Instead, plasma-physical problems relevant to these extreme astrophysical environments call for constructing relativistic quantum plasma (RQP) physics based on quantum electrodynamics (QED). In this review, after briefly describing the astrophysical systems of interest and identifying some of the key plasma-physical problems important to them, we survey the recent progress in the development of such a theory. We first discuss the ways in which the presence of a super-critical field modifies the properties of vacuum and matter and then outline the basic theoretical framework for describing both non-relativistic and RQPs. We then turn to some specific astrophysical applications of relativistic QED plasma physics relevant to magnetar magnetospheres and to central engines of core-collapse SNe and long GRBs. Specifically, we discuss the propagation of light through a magnetar magnetosphere; large-scale MHD processes driving magnetar activity and responsible for jet launching and propagation in

  13. In This Issue

    Science.gov (United States)

    1996-04-01

    biomolecule and protein structure elucidation and it is becoming a routine biochemical tool. The explosive growth of this technique has stimulated the publishing of a three-part review in the Topics in Chemical Instrumentation feature. Part I, which covers instrumentation and spectral interpretation, is by Hofstadler, Bakhtiar, and Smith (page A82) and appears in this issue. They describe how the electrospray apparatus, which produces a fine aerosol of highly charged microdroplets, can be coupled with a mass spectrometer to analyze complex molecules. Next they show how the spectra achieved from this process can be interpreted using human hemoglobin as an example. This technique provides the ability to "weigh" large molecules in a manner unimaginable in the era of the two-pan balance and is thus a desirable addition to the curriculum. The appearance of so many new technologies in the curriculum poses a problem for many teachers. They want to teach not only the manipulations required to run the instruments but also provide an understanding of the ideas behind them. Paniagua and Moyano (page 310) tackle the problem of how to introduce the principles of pulsed NMR and answer the basic questions in ways that undergraduates will understand. They discuss these in terms of the classical model, the naive quantum model, and the density operator approach. Equally important to understanding the theory behind analytical instruments is understanding how they actually acquire and process data. Duffy and vanLoon (page 318) have designed an exercise to teach interfacing techniques in the instrumental analysis laboratory. Students use a relatively inexpensive interface unit and a PC to investigate the relationship among the signal generator, the detector, the signal modifier, and the output transducer in five real instrumental situations: temperature, light intensity, and potentiometric measurement; spectrophotometry; and redox titration. The ubiquitous use of instruments and computer

  14. Discussing the role of tropical and subtropical moisture sources in extreme precipitation events in the Mediterranean region from a climate change perspective

    Directory of Open Access Journals (Sweden)

    S. O. Krichak

    2015-06-01

    Full Text Available Extreme precipitation events in the Mediterranean region during the cool season are strongly affected by the export of moist air from tropical and subtropical areas into the extratropics. The aim of this paper is to present a discussion of the major research efforts on this subject and to formulate a summary of our understanding of this phenomenon, along with its recent past trends from a climate change perspective. The issues addressed are: a discussion of several case studies; the origin of the air moisture and the important role of atmospheric rivers for fueling the events; the mechanism responsible for the intensity of precipitation during the events, and the possible role of global warming in recent past trends in extreme weather events over the Mediterranean region.

  15. Sport Specialization: Developmental and Learning Issues

    Science.gov (United States)

    Branta, Crystal F.

    2010-01-01

    When addressing issues related to sport specialization, it is important to consider how skills are developed and learned. Changes in physical development and maturation throughout the growing years affect the motor performance abilities of individuals who are not yet mature. Such variability in skill development is important to understand when…

  16. Aboriginal Self-Government in Canada: Current Trends and Issues. Purich's Aboriginal Issues Series.

    Science.gov (United States)

    Hylton, John H., Ed.

    This book contains 13 chapters analyzing important practical issues that must be addressed as Aboriginal self-government becomes fully operational in Canada. These issues are related to social problems and policies, criminal justice, community services, education, employment and job training, finance, the land base of government, women's rights…

  17. Predictability of extreme values in geophysical models

    Directory of Open Access Journals (Sweden)

    A. E. Sterk

    2012-09-01

    Full Text Available Extreme value theory in deterministic systems is concerned with unlikely large (or small values of an observable evaluated along evolutions of the system. In this paper we study the finite-time predictability of extreme values, such as convection, energy, and wind speeds, in three geophysical models. We study whether finite-time Lyapunov exponents are larger or smaller for initial conditions leading to extremes. General statements on whether extreme values are better or less predictable are not possible: the predictability of extreme values depends on the observable, the attractor of the system, and the prediction lead time.

  18. USSR Space Life Sciences Digest, issue 15

    Science.gov (United States)

    Hooke, Lydia Razran (Editor); Teeter, Ronald (Editor); Garshnek, Victoria (Editor); Rowe, Joseph (Editor)

    1988-01-01

    This is the 15th issue of NASA's USSR Space Life Sciences Digest. It contains abstracts of 59 papers published in Russian language periodicals or presented at conferences and of two new Soviet monographs. Selected abstracts are illustrated with figures and tables from the original. An additional feature is a review of a conference devoted to the physiology of extreme states. The abstracts included in this issue have been identified as relevant to 29 areas of space biology and medicine. These areas are adaptation, biological rhythms, biospherics, body fluids, botany, cardiovascular and respiratory systems, endocrinology, enzymology, equipment and instrumentation, exobiology, genetics, habitability and environment effects, human performance, immunology, life support systems, mathematical modeling, metabolism, microbiology, musculoskeletal system, neurophysiology, nutrition, operational medicine, perception. personnel selection, psychology, radiobiology, reproductive biology, and space biology and medicine.

  19. State of the Field: Extreme Precision Radial Velocities

    CERN Document Server

    Fischer, Debra; Arriagada, Pamela; Baluev, Roman V; Bean, Jacob L; Bouchy, Francois; Buchhave, Lars A; Carroll, Thorsten; Chakraborty, Abhijit; Dawson, Rebekah I; Diddams, Scott A; Dumusque, Xavier; Eastman, Jason D; Endl, Michael; Figueira, Pedro; Ford, Eric B; Foreman-Mackey, Daniel; Fournier, Paul; Furesz, Gabor; Gaudi, B Scott; Gregory, Philip C; Grundahl, Frank; Hatzes, Artie P; Hebrard, Guillaume; Herrero, Enrique; Hogg, David W; Howard, Andrew W; Johnson, John A; Jorden, Paul; Jurgenson, Colby A; Latham, David W; Laughlin, Greg; Loredo, Thomas J; Lovis, Christophe; Mahadevan, Suvrath; McCracken, Tyler M; Pepe, Francesco; Perez, Mario; Phillips, David F; Plavchan, Peter P; Prato, Lisa; Quirrenbach, Andreas; Reiners, Ansgar; Robertson, Paul; Santos, Nuno C; Sawyer, David; Segransan, Damien; Sozzetti, Alessandro; Steinmetz, Tilo; Szentgyorgyi, Andrew; Udry, Stephane; Valenti, Jeff A; Wang, Sharon X; Wittenmyer, Robert A; Wright, Jason T

    2016-01-01

    The Second Workshop on Extreme Precision Radial Velocities defined circa 2015 the state of the art Doppler precision and identified the critical path challenges for reaching 10 cm/s measurement precision. The presentations and discussion of key issues for instrumentation and data analysis and the workshop recommendations for achieving this precision are summarized here. Beginning with the HARPS spectrograph, technological advances for precision radial velocity measurements have focused on building extremely stable instruments. To reach still higher precision, future spectrometers will need to produce even higher fidelity spectra. This should be possible with improved environmental control, greater stability in the illumination of the spectrometer optics, better detectors, more precise wavelength calibration, and broader bandwidth spectra. Key data analysis challenges for the precision radial velocity community include distinguishing center of mass Keplerian motion from photospheric velocities, and the proper ...

  20. Robust Extreme Learning Machine With its Application to Indoor Positioning.

    Science.gov (United States)

    Lu, Xiaoxuan; Zou, Han; Zhou, Hongming; Xie, Lihua; Huang, Guang-Bin

    2016-01-01

    The increasing demands of location-based services have spurred the rapid development of indoor positioning system and indoor localization system interchangeably (IPSs). However, the performance of IPSs suffers from noisy measurements. In this paper, two kinds of robust extreme learning machines (RELMs), corresponding to the close-to-mean constraint, and the small-residual constraint, have been proposed to address the issue of noisy measurements in IPSs. Based on whether the feature mapping in extreme learning machine is explicit, we respectively provide random-hidden-nodes and kernelized formulations of RELMs by second order cone programming. Furthermore, the computation of the covariance in feature space is discussed. Simulations and real-world indoor localization experiments are extensively carried out and the results demonstrate that the proposed algorithms can not only improve the accuracy and repeatability, but also reduce the deviation and worst case error of IPSs compared with other baseline algorithms.

  1. Conceptual Design Report for the Extreme Ecosystems Test Chambers

    Energy Technology Data Exchange (ETDEWEB)

    C. Barnes; J. Beller; K. Caldwell; K. Croft; R. Cherry; W. Landman

    1998-12-01

    This conceptual design supports the creation of Extreme Ecosystems Test Chambers, which will replicate deep subsurface and subocean environments characterized by high pressure (2,000 psi) and subfreezing to high temperature (-4 to 300 degrees F) with differing chemical and saturation conditions. The design provides a system to support research and development that includes heat transfer, phase change issues in porous media, microbiology in extreme environments, and carbon sequestration and extraction. The initial system design is based on the research needs to support the commercial production of methane hydrates from subsurface sediments. The design provides for three pressure vessels: a Down Hole Test Vessel, a Vertical Multi-phase Test Vessel, and a Horizontal Multi-phase Test Vessel.

  2. [Hormonal changes in response to extreme environment factors].

    Science.gov (United States)

    Koubassov, R V

    2014-01-01

    In this paper presented current state about hormonal changes in sympathetic-adrenal, hypophysis-adrenal, hypophysis-gonads and thyroid levels from extreme environment factors. It's shown that hypophysis gonads and thyroid endocrine links along with sympathetic adrenal, hypophysis adrenal axes are very important relevance in response to extreme environment factors and organism adaptation. In this time a hormonal secretion changes corresponds as interrelated reactions cascade in mechanisms of homeostasis maintenance. A studying of this mechanisms and revealing of its role in stress pathogenesis is fundamental biomedical investigation task. A problem solving allow to perfect prophylactic and treatment methods against stress diseases.

  3. Imaging extrasolar planets with the European Extremely Large Telescope

    Directory of Open Access Journals (Sweden)

    Jolissaint L.

    2011-07-01

    Full Text Available The European Extremely Large Telescope (E-ELT is the most ambitious of the ELTs being planned. With a diameter of 42 m and being fully adaptive from the start, the E-ELT will be more than one hundred times more sensitive than the present-day largest optical telescopes. Discovering and characterising planets around other stars will be one of the most important aspects of the E-ELT science programme. We model an extreme adaptive optics instrument on the E-ELT. The resulting contrast curves translate to the detectability of exoplanets.

  4. A Case Report on Upper Extremity Pain of Cardiac Origin

    Directory of Open Access Journals (Sweden)

    Turgay Altınbilek

    2016-08-01

    Full Text Available Upper extremity pain can originate from the musculoskeletal system, or be a reflection of problems originating from various organs. Therefore, it is highly important to perform a detailed clinical evaluation on patients during differential diagnosis. In this case report, we present a 61 year-old male patient who was admitted with pain in both upper extremities and the upper back that presumed to be of cardiac origin following our clinical evaluations. The patient was referred to the cardiology department, where he was diagnosed with coronary heart disease. The patient’s complaints of pain were fully resolved through the application of an intracoronary stent.

  5. A radar-based regional extreme rainfall analysis to derive the thresholds for a novel automatic alert system in Switzerland

    Science.gov (United States)

    Panziera, Luca; Gabella, Marco; Zanini, Stefano; Hering, Alessandro; Germann, Urs; Berne, Alexis

    2016-06-01

    This paper presents a regional extreme rainfall analysis based on 10 years of radar data for the 159 regions adopted for official natural hazard warnings in Switzerland. Moreover, a nowcasting tool aimed at issuing heavy precipitation regional alerts is introduced. The two topics are closely related, since the extreme rainfall analysis provides the thresholds used by the nowcasting system for the alerts. Warm and cold seasons' monthly maxima of several statistical quantities describing regional rainfall are fitted to a generalized extreme value distribution in order to derive the precipitation amounts corresponding to sub-annual return periods for durations of 1, 3, 6, 12, 24 and 48 h. It is shown that regional return levels exhibit a large spatial variability in Switzerland, and that their spatial distribution strongly depends on the duration of the aggregation period: for accumulations of 3 h and shorter, the largest return levels are found over the northerly alpine slopes, whereas for longer durations the southern Alps exhibit the largest values. The inner alpine chain shows the lowest values, in agreement with previous rainfall climatologies. The nowcasting system presented here is aimed to issue heavy rainfall alerts for a large variety of end users, who are interested in different precipitation characteristics and regions, such as, for example, small urban areas, remote alpine catchments or administrative districts. The alerts are issued not only if the rainfall measured in the immediate past or forecast in the near future exceeds some predefined thresholds but also as soon as the sum of past and forecast precipitation is larger than threshold values. This precipitation total, in fact, has primary importance in applications for which antecedent rainfall is as important as predicted one, such as urban floods early warning systems. The rainfall fields, the statistical quantity representing regional rainfall and the frequency of alerts issued in case of

  6. Volume 4, Issue 1

    Directory of Open Access Journals (Sweden)

    Karen Nelson

    2013-04-01

    Full Text Available This issue showcases a rich variety of first year issues reported from an assortment of national and international settings.  In the Feature, Professor Phil Long (University of Queensland and Associate Professor Shane Dawson (University of South Australia share their views about the issues and challenges associated with learning analytics.  Reflecting the adage from last century that successful student engagement is the result of a combination of warmth and challenge the articles and practice reports focus on both the cognitive challenge  (e.g., assessment, forms of knowledge, distance learning, research skills, peer learning, etc. and the affective warmth (e.g., help-seeking, collaboration, identity development etc. aspects of student behaviour.

  7. Volume 7 Issue 2

    Directory of Open Access Journals (Sweden)

    Tracy Creagh

    2016-07-01

    Full Text Available The continuing interest and commitment to improving the student experience in the tertiary sector was reflected in yet another successful Students, Transitions, Achievement, Retention and Success (STARS Conference recently held in Perth, Western Australia (June 29-July 2, 2016.  As is customary, this issue of the journal publishes the top research papers selected via a peer review process and the top Emerging Initiatives selected by the Conference Committee.  As well, a Good Practice Report was selected for this issue.  The Invited Feature in this issue republishes an article from Professor Sally Kift, President of the Australian Learning and Teaching Fellows (and one of the Editors of Student Success. The statement draws on and is representative of the national reaction to the closure of the OLT, highlighting the substantial role it has played in developing and disseminating innovation and good practice in tertiary teaching and learning.

  8. Year 2000 commercial issues

    Energy Technology Data Exchange (ETDEWEB)

    Kratz, M.P.J.; Booth, R.T. [Bennett Jones, Calgary, AB (Canada)

    1998-12-31

    This presentation focused on commercial aspects of the Y2K including: (1) special communication issues, (2) outsourcing transactions, (3) joint ventures and the significance for the oil and gas industry, and (4) contingency planning. Communication issues involve interaction with suppliers and vendors of critical systems, liability for Y2K communications (misrepresentation, defamation, promissory estoppel, statutory liability), securities disclosure (Canadian and US SEC requirements), protected communications, protection for Year 2000 statements. Outsourcing problems highlighted include resistance of suppliers to assume responsibility for Y2K problem remediation, factors which support and negate supplier responsibility, scope of suppliers` obligation, and warranties in respect of third party software. Regarding joint ventures, questions concerning limitations on liability, supply warranties, stand-by arrangements, stockpiling inventory, indemnities, confidentiality, operator compensation versus operator risk, and insurance were raised and addressed. Among contingency planning issues the questions of Y2K legal audit, and disclosure aspects of contingency planning were the featured concerns. figs.

  9. Evolution of newspaper coverage of water issues in Australia during 1843-2011.

    Science.gov (United States)

    Wei, Jing; Wei, Yongping; Western, Andrew; Skinner, Dominic; Lyle, Clive

    2015-05-01

    News accounts both reflect and influence public opinion through their noted 'agenda-setting' capability. We examined newspaper articles in Australia's The Sydney Morning Herald from 1843 to 2011 to observe the evolution of media coverage on water issues related to water resources management. The results showed that water supply-related articles have dominated the reporting of water issues since 1843. This emphasis is reflected in the institutions involved and their related policy/management initiatives, as well as the themes of the articles. Extreme events such as flooding and drought have punctuated the historical record of reports on water issues. An economic development-driven tone was overwhelmingly predominant in newspaper articles (85 % of the total); however, there has been a marked decline in the importance of development-driven tone relative to environmental-sustainability oriented tone of articles since 1994. People from academia and NGOs were rarely quoted. Inclusion of wider range stakeholders should be considered as a strategic break-through and natural events should be considered as an "opportunity" to change public opinion on water issues for environmental sustainability.

  10. Quantification of Uncertainties in Projections of Hydro-meteorological Extremes

    Science.gov (United States)

    Meresa, Hadush; Romanowicz, Renata; Lawrence, Deborah

    2016-04-01

    The impact of climate change on hydrological extremes has been widely studied particularly after the publication of the IPCC AR4 report in 2007. The methodology applied to derive hydrological extremes under climate change adopted by most scientists consists of running a cascade of models, starting from assumed emission scenarios applied to a global circulation model (GCM) and ending at hydrological model simulations. Therefore, the projected hydro-meteorological extremes are highly uncertain due to uncertainties inherent in all the links of the modelling chain. In addition, due to the complexity of hydrologic models that use a large number of parameters to characterize hydrologic processes, many challenges arise with respect to quantification of uncertainty. This issue needs to be properly quantified to understand possible confidence ranges in extremes in the future. This paper aims to quantify the uncertainty in the hydrological projection of future extremes in streamflow and precipitation indices in mountainous and lowland catchments in Poland, using a multi-model approach based on climate projections obtained from the ENSMEBLE and EUROCORDEX projects, multiple realizations of catchment scale downscaled rainfalls, two hydrological models (HBV and GR4J) and a number of hydrological model parameters. The time-span of projections covers the 21st century. The potential sources of hydrological projection uncertainties are quantified through a Monte Carlo based simulation approach. We compare the weights based on different goodness-of-fit criteria in their ability to constrain the uncertainty of the extremes. The results of the comparison show a considerable dependence of uncertainty ranges on the type of extremes (low or high flows) and on the criterion used. The predicted distribution of future streamflows considering all sources of uncertainty (climate model, bias correction and hydrological model) is used to derive marginal distributions of uncertainty related to

  11. Can reanalysis datasets describe the persistent temperature and precipitation extremes over China?

    Science.gov (United States)

    Zhu, Jian; Huang, Dan-Qing; Yan, Pei-Wen; Huang, Ying; Kuang, Xue-Yuan

    2016-08-01

    The persistent temperature and precipitation extremes may bring damage to the economy and human due to their intensity, duration and areal coverage. Understanding the quality of reanalysis datasets in descripting these extreme events is important for detection, attribution and model evaluation. In this study, the performances of two reanalysis datasets [the twentieth century reanalysis (20CR) and Interim ECMWF reanalysis (ERA-Interim)] in reproducing the persistent temperature and precipitation extremes in China are evaluated. For the persistent temperature extremes, the two datasets can better capture the intensity indices than the frequency indices. The increasing/decreasing trend of persistent warm/cold extremes has been reasonably detected by the two datasets, particularly in the northern part of China. The ERA-Interim better reproduces the climatology and tendency of persistent warm extremes, while the 20CR has better skill to depict the persistent cold extremes. For the persistent precipitation extremes, the two datasets have the ability to reproduce the maximum consecutive 5-day precipitation. The two datasets largely underestimate the maximum consecutive dry days over the northern part of China, while overestimate the maximum consecutive wet days over the southern part of China. For the response of the precipitation extremes against the temperature variations, the ERA-Interim has good ability to depict the relationship among persistent precipitation extremes, local persistent temperature extremes, and global temperature variations over specific regions.

  12. Quantitative risk assessment of the effects of drought on extreme temperature in eastern China

    Science.gov (United States)

    Hao, Zengchao; Hao, Fanghua; Singh, Vijay P.; Ouyang, Wei

    2017-09-01

    Hot extremes may lead to disastrous impacts on human health and agricultural production. Previous studies have revealed the feedback between drought and hot extremes in large regions of eastern China, while quantifying the impact of antecedent drought on hot extremes has been limited. This study aims at quantitatively assessing the risk of extreme temperature conditioned on the antecedent drought condition represented by Standardized Precipitation Index (SPI) during summer time in eastern China. A copula-based model is proposed to construct the joint probability distribution of extreme temperature and drought based on 6 month SPI (SPI6). Accordingly, the conditional probability distribution is employed to quantify impacts of antecedent dry (and wet) conditions on the exceedance probability of extreme temperature. Results show that the likelihood of extreme temperature exceeding high quantiles is higher given antecedent dry conditions than that given antecedent wet conditions in large regions from southwestern to northeastern China. Specifically, the conditional probability difference of temperature exceeding 80th percentile given SPI6 lower than or equal to -0.5 and SPI6 higher than 0.5 is around 0.2-0.3. The case study of the 2006 summer hot extremes and drought in Sichuan and Chongqing region shows that the conditional return period of extreme temperature conditioned on antecedent drought is around 5-50 years shorter than univariate return period. These results quantify the impact of antecedent drought on subsequent extreme temperature and highlight the important role of antecedent drought in intensifying hot extremes in these regions.

  13. Interpretation of Extreme Scattering Events

    CERN Document Server

    Walker, M A

    2000-01-01

    Extreme Scattering Events are sometimes manifest in the light-curves of compact radio-quasars at frequencies of a few GHz. These events are not understood. The model which appears to offer the best explanation requires a new population of AU-sized, neutral gas clouds; these clouds would then make up a large fraction of the Galaxy's dark matter. Independent of the question of which theoretical model is correct, if we extrapolate the observed behaviour to low radio-frequencies, we expect that the sky should be criss-crossed by a network of narrow caustics, at frequencies below about 700 MHz. Consequently at these frequencies sources should typically manifest additional, faint images which are substantially delayed with respect to the primary image. Although some examples of this type of behaviour are already known, it is expected that these are just the tip of the iceberg, with strong selection biases having been imposed by the instrumentation employed to date.

  14. QCD matter in extreme environments

    CERN Document Server

    Fukushima, Kenji

    2011-01-01

    We review various theoretical approaches to the states of QCD matter out of quarks and gluons in extreme environments such as the high-temperature states at zero and finite baryon density and the dimensionally reduced state under an intense magnetic field. The topics at high temperature include the Polyakov loop and the 't Hooft loop in the perturbative regime, the Polyakov loop behaviour and the phase transition in some of non-perturbative methods; the strong-coupling expansion, the large-Nc limit and the holographic QCD models. These analyses are extended to hot and dense matter with a finite baryon chemical potential. We point out that the difficulty in the finite-density problem has similarity to that under a strong magnetic field. We make a brief summary of results related to the topological contents probed by the magnetic field and the Chiral Magnetic Effect. We also address the close connection to the (1+1) dimensional system.

  15. Extreme resilience in cochleate nanoparticles.

    Science.gov (United States)

    Bozó, Tamás; Brecska, Richárd; Gróf, Pál; Kellermayer, Miklós S Z

    2015-01-20

    Cochleates, prospective nanoscale drug delivery vehicles, are rolls of negatively charged phospholipid membrane layers. The membrane layers are held together by calcium ions; however, neither the magnitude of membrane interaction forces nor the overall mechanical properties of cochleates have been known. Here, we manipulated individual nanoparticles with atomic force microscopy to characterize their nanomechanical behavior. Their stiffness (4.2-12.5 N/m) and membrane-rupture forces (45.3-278 nN) are orders of magnitude greater than those of the tough viral nanoshells. Even though the fundamental building material of cochleates is a fluid membrane, the combination of supramolecular geometry, the cross-linking action of calcium, and the tight packing of the ions apparently lead to extreme mechanical resilience. The supramolecular design of cochleates may provide efficient protection for encapsulated materials and give clues to understanding biomolecular structures of similar design, such as the myelinated axon.

  16. Extreme ultraviolet Talbot interference lithography.

    Science.gov (United States)

    Li, Wei; Marconi, Mario C

    2015-10-05

    Periodic nanopatterns can be generated using lithography based on the Talbot effect or optical interference. However, these techniques have restrictions that limit their performance. High resolution Talbot lithography is limited by the very small depth of focus and the demanding requirements in the fabrication of the master mask. Interference lithography, with large DOF and high resolution, is limited to simple periodic patterns. This paper describes a hybrid extreme ultraviolet lithography approach that combines Talbot lithography and interference lithography to render an interference pattern with a lattice determined by a Talbot image. As a result, the method enables filling the arbitrary shaped cells produced by the Talbot image with interference patterns. Detailed modeling, system design and experimental results using a tabletop EUV laser are presented.

  17. Weather extremes could affect agriculture

    Science.gov (United States)

    Balcerak, Ernie

    2012-05-01

    As Earth's climate warms, agricultural producers will need to adapt. Changes, especially increases in extreme events, are already having an impact on food production, according to speakers at a 1 May session on agriculture and food security at the AGU Science Policy Conference. Christopher Field, director of the Department of Global Ecology at the Carnegie Institution for Science of Washington, D. C., pointed out the complex factors that come into play in understanding food security, including spatially varying controls and stresses, incomplete models, and the potential for threshold responses. Factors that are likely to cause problems include increasing population; increasing preference for meat, which needs more land and energy inputs to produce; climate change; and increasing use of agricultural lands for biomass energy.

  18. Generic Hurricane Extreme Seas State

    DEFF Research Database (Denmark)

    Wehmeyer, Christof; Skourup, Jesper; Frigaard, Peter

    2012-01-01

    Extreme sea states, which the IEC 61400-3 (2008) standard requires for the ultimate limit state (ULS) analysis of offshore wind turbines are derived to establish the design basis for the conceptual layout of deep water floating offshore wind turbine foundations in hurricane affected areas...... data is required for a type specific conceptual design. ULS conditions for different return periods are developed, which can subsequently be applied in siteindependent analysis and conceptual design. Recordings provided by National Oceanic and Atmospheric Administration (NOAA), of hurricanes along...... for hurricane generates seas by Young (1998, 2003, and 2006), requiring maximum wind speeds, forward velocity and radius to maximum wind speed. An averaged radius to maximum sustained wind speeds, according to Hsu et al. (1998) and averaged forward speed of cyclonic storms are applied in the initial state...

  19. Pneumatic tourniquets in extremity surgery.

    LENUS (Irish Health Repository)

    Wakai, A

    2012-02-03

    Pneumatic tourniquets maintain a relatively bloodless field during extremity surgery, minimize blood loss, aid identification of vital structures, and expedite the procedure. However, they may induce an ischemia-reperfusion injury with potentially harmful local and systemic consequences. Modern pneumatic tourniquets are designed with mechanisms to regulate and maintain pressure. Routine maintenance helps ensure that these systems are working properly. The complications of tourniquet use include postoperative swelling, delay of recovery of muscle power, compression neurapraxia, wound hematoma with the potential for infection, vascular injury, tissue necrosis, and compartment syndrome. Systemic complications can also occur. The incidence of complications can be minimized by use of wider tourniquets, careful preoperative patient evaluation, and adherence to accepted principles of tourniquet use.

  20. SPECIAL ISSUE EDITORIAL

    Institute of Scientific and Technical Information of China (English)

    Amy J.C.TRAPPEY; Fataneh Taghaboni DUTTA; Kai-Ying CHEN

    2010-01-01

    @@ This special issue of Journal of Systems Science and Systems Engineering recognizes the contributions of authors and participants in the 16th ISPE International Conference on Concurrent Engineering (CE2009), 2009 ASME International Manufacturing - Science and Engineering Conference (MSEC) and 2009 IEEE International Conference on Systems, Man and Cybernetics. Among related papers presented in these conferences, the guest editors have selectively identified and invited the authors to re-write and extend their works to full-length papers for re-submission to the special issue.

  1. Acquired Upper Extremity Growth Arrest.

    Science.gov (United States)

    Gauger, Erich M; Casnovsky, Lauren L; Gauger, Erica J; Bohn, Deborah C; Van Heest, Ann E

    2017-01-01

    This study reviewed the clinical history and management of acquired growth arrest in the upper extremity in pediatric patients. The records of all patients presenting from 1996 to 2012 with radiographically proven acquired growth arrest were reviewed. Records were examined to determine the etiology and site of growth arrest, management, and complications. Patients with tumors or hereditary etiology were excluded. A total of 44 patients (24 boys and 20 girls) with 51 physeal arrests who presented at a mean age of 10.6 years (range, 0.8-18.2 years) were included in the study. The distal radius was the most common site (n=24), followed by the distal humerus (n=8), metacarpal (n=6), distal ulna (n=5), proximal humerus (n=4), radial head (n=3), and olecranon (n=1). Growth arrest was secondary to trauma (n=22), infection (n=11), idiopathy (n=6), inflammation (n=2), compartment syndrome (n=2), and avascular necrosis (n=1). Twenty-six patients (59%) underwent surgical intervention to address deformity caused by the physeal arrest. Operative procedures included ipsilateral unaffected bone epiphysiodesis (n=21), shortening osteotomy (n=10), lengthening osteotomy (n=8), excision of physeal bar or bone fragment (n=2), angular correction osteotomy (n=1), and creation of single bone forearm (n=1). Four complications occurred; 3 of these required additional procedures. Acquired upper extremity growth arrest usually is caused by trauma or infection, and the most frequent site is the distal radius. Growth disturbances due to premature arrest can be treated effectively with epiphysiodesis or osteotomy. In this series, the specific site of anatomic growth arrest was the primary factor in determining treatment. [Orthopedics. 2017; 40(1):e95-e103.]. Copyright 2016, SLACK Incorporated.

  2. Extremely red quasars in BOSS

    Science.gov (United States)

    Hamann, Fred; Zakamska, Nadia L.; Ross, Nicholas; Paris, Isabelle; Alexandroff, Rachael M.; Villforth, Carolin; Richards, Gordon T.; Herbst, Hanna; Brandt, W. Niel; Cook, Ben; Denney, Kelly D.; Greene, Jenny E.; Schneider, Donald P.; Strauss, Michael A.

    2017-01-01

    Red quasars are candidate young objects in an early transition stage of massive galaxy evolution. Our team recently discovered a population of extremely red quasars (ERQs) in the Baryon Oscillation Spectroscopic Survey (BOSS) that has a suite of peculiar emission-line properties including large rest equivalent widths (REWs), unusual `wingless' line profiles, large N V/Lyα, N V/C IV, Si IV/C IV and other flux ratios, and very broad and blueshifted [O III] λ5007. Here we present a new catalogue of C IV and N V emission-line data for 216 188 BOSS quasars to characterize the ERQ line properties further. We show that they depend sharply on UV-to-mid-IR colour, secondarily on REW(C IV), and not at all on luminosity or the Baldwin Effect. We identify a `core' sample of 97 ERQs with nearly uniform peculiar properties selected via i-W3 ≥ 4.6 (AB) and REW(C IV) ≥ 100 Å at redshifts 2.0-3.4. A broader search finds 235 more red quasars with similar unusual characteristics. The core ERQs have median luminosity ˜ 47.1, sky density 0.010 deg-2, surprisingly flat/blue UV spectra given their red UV-to-mid-IR colours, and common outflow signatures including BALs or BAL-like features and large C IV emission-line blueshifts. Their SEDs and line properties are inconsistent with normal quasars behind a dust reddening screen. We argue that the core ERQs are a unique obscured quasar population with extreme physical conditions related to powerful outflows across the line-forming regions. Patchy obscuration by small dusty clouds could produce the observed UV extinctions without substantial UV reddening.

  3. Policy implications of drug importation.

    Science.gov (United States)

    Palumbo, Francis B; Mullins, C Daniel; Slagle, Ashley F; Rizer, Jessica

    2007-12-01

    Importation of prescription drugs into the United States has been a major health policy issue for some time. The original objective of personal importation was to allow patients to have access to drugs that were not available to them in the United States either for continuation of therapy begun in another country or when all US Food and Drug Administration (FDA)-approved drug options for their condition had been exhausted. An increasing proportion of personally imported drugs are currently marketed in the United States, but imported drugs are presumably available at a lower cost to the consumer. As US consumers opt for importation through Internet sites and other means of purchase from other countries, potential risks of exposure to counterfeit products have increased, presenting challenges to both the US regulatory system and pharmaceutical companies. This commentary summarizes the current state of importation of prescription drugs into the United States. Regulators and policymakers are under increasing pressure to address the high cost of branded drugs in the United States and the desires of many US patients to purchase less expensive formulations of these products through importation. In many cases, the historical policies surrounding personal importation of prescription drugs that are not sold in the United States have been blatantly ignored, leaving the FDA in a quandary. While current legislative proposals would allow for greater access to drugs directly to consumers from other countries, they do not address the fact that the FDA has no ability to monitor the safety and efficacy of imported products. As such, the possibility of the entry of counterfeit medications and the related potential harm remain concerns.

  4. Survey of upper extremity injuries among martial arts participants.

    Science.gov (United States)

    Diesselhorst, Matthew M; Rayan, Ghazi M; Pasque, Charles B; Peyton Holder, R

    2013-01-01

    To survey participants at various experience levels of different martial arts (MA) about upper extremity injuries sustained during training and fighting. A 21-s question survey was designed and utilised. The survey was divided into four groups (Demographics, Injury Description, Injury Mechanism, and Miscellaneous information) to gain knowledge about upper extremity injuries sustained during martial arts participation. Chi-square testing was utilised to assess for significant associations. Males comprised 81% of respondents. Involvement in multiple forms of MA was the most prevalent (38%). The hand/wrist was the most common area injured (53%), followed by the shoulder/upper arm (27%) and the forearm/elbow (19%). Joint sprains/muscle strains were the most frequent injuries reported overall (47%), followed by abrasions/bruises (26%). Dislocations of the upper extremity were reported by 47% of participants while fractures occurred in 39%. Surgeries were required for 30% of participants. Females were less likely to require surgery and more likely to have shoulder and elbow injuries. Males were more likely to have hand injuries. Participants of Karate and Tae Kwon Do were more likely to have injuries to their hands, while participants of multiple forms were more likely to sustain injuries to their shoulders/upper arms and more likely to develop chronic upper extremity symptoms. With advanced level of training the likelihood of developing chronic upper extremity symptoms increases, and multiple surgeries were required. Hand protection was associated with a lower risk of hand injuries. Martial arts can be associated with substantial upper extremity injuries that may require surgery and extended time away from participation. Injuries may result in chronic upper extremity symptoms. Hand protection is important for reducing injuries to the hand and wrist.

  5. Vaccines and vaccinations. The strategic issues.

    Science.gov (United States)

    Ford, R B

    2001-05-01

    The rapid proliferation of companion animal vaccines, advances in diagnostic and vaccine technology, and concerns over vaccine safety are clearly among the most important issues practicing veterinarians face as we enter the 21st century. Although many would argue that these are already issues, the future promises to be especially challenging as the vaccines we currently use and the protocols we recommend undergo unprecedented review.

  6. Energy Issue Draws Attention from NPC Delegates

    Institute of Scientific and Technical Information of China (English)

    Zhi Yuan; Li Wen

    2002-01-01

    @@ Resources and energy became the focus issues at the fifth session of Ninth National People's Congress (NPC) held in Beijing in mid-March. "China's crude import is one third of the country's total demand.The State has regarded the petroleum supply as a strategic issue related to the national economic security," said Dr. Wang Tao, a NPC delegate and former CNPC President, in an interview with media during the NPC session.

  7. Flood protection diversification to reduce probabilities of extreme losses.

    Science.gov (United States)

    Zhou, Qian; Lambert, James H; Karvetski, Christopher W; Keisler, Jeffrey M; Linkov, Igor

    2012-11-01

    Recent catastrophic losses because of floods require developing resilient approaches to flood risk protection. This article assesses how diversification of a system of coastal protections might decrease the probabilities of extreme flood losses. The study compares the performance of portfolios each consisting of four types of flood protection assets in a large region of dike rings. A parametric analysis suggests conditions in which diversifications of the types of included flood protection assets decrease extreme flood losses. Increased return periods of extreme losses are associated with portfolios where the asset types have low correlations of economic risk. The effort highlights the importance of understanding correlations across asset types in planning for large-scale flood protection. It allows explicit integration of climate change scenarios in developing flood mitigation strategy.

  8. Impact of climate extremes on wildlife plant flowering over Germany

    Science.gov (United States)

    Siegmund, J. F.; Wiedermann, M.; Donges, J. F.; Donner, R. V.

    2015-11-01

    Ongoing climate change is known to cause an increase in the frequency and amplitude of local temperature and precipitation extremes in many regions of the Earth. While gradual changes in the climatological conditions are known to strongly influence plant flowering dates, the question arises if and how extremes specifically impact the timing of this important phenological phase. In this study, we systematically quantify simultaneities between meteorological extremes and the timing of flowering of four shrub species across Germany by means of event coincidence analysis, a novel statistical tool that allows assessing whether or not two types of events exhibit similar sequences of occurrences. Our systematic investigation supports previous findings of experimental studies by highlighting the impact of early spring temperatures on the flowering of wildlife plants. In addition, we find statistically significant indications for some long-term relations reaching back to the previous year.

  9. Upper extremity compartmental anatomy: clinical relevance to radiologists

    Energy Technology Data Exchange (ETDEWEB)

    Toomayan, Glen A.; Robertson, Fabienne; Major, Nancy M. [Duke University Medical Center, Department of Radiology, P.O. Box 3808, Durham, NC (United States); Duke University Medical Center, Division of Orthopaedic Surgery, Department of Surgery, P.O. Box 3808, Durham, NC (United States); Brigman, Brian E. [Duke University Medical Center, Division of Orthopaedic Surgery, Department of Surgery, P.O. Box 3808, Durham, NC (United States)

    2006-04-15

    Malignant tumors of the upper extremity are uncommon, and their care should be referred to specialized facilities with experience treating these lesions. The Musculoskeletal Tumor Society (MSTS) staging system is used by the surgeon to determine appropriate surgical management, assess prognosis, and communicate with other healthcare providers. Magnetic resonance imaging (MRI) is employed pre-operatively to identify a lesion's compartment of origin, determine extent of spread, and plan biopsy and resection approaches. Involvement of neurovascular structures may result in devastating loss of upper extremity function, requiring amputation. Violation of high-resistance compartmental barriers necessitates more extensive surgical resection. Biopsy may be performed by the radiologist using imaging guidance. Knowledge of compartmental anatomy allows the radiologist or surgeon to use an easily excisable biopsy approach and prevent iatrogenic spread to unaffected compartments. Case examples are presented to illustrate the importance of compartmental anatomy in the management of benign and malignant upper extremity tumors. (orig.)

  10. Embedded generation and network management issues

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-07-01

    This report focuses on the characteristics of power generators that are important to accommodation in a distribution system. Part 1 examines the differences between transmission and distribution systems, and issues such as randomness, diversity, predictability, and controllability associated with accommodation in a distribution system. Part 2 concentrates on technical and operational issues relating to embedded generation, and the possible impact of the New Electricity Trading Arrangements. Commercial issues, contractual relationships for network charging and provision of services, and possible ways forward are examined in the last three parts of the report.

  11. Radiation protection: some philosophical and ethical issues.

    Science.gov (United States)

    Sia, Santiago; Chhem, Rethy K; Czarwinski, Renate

    2010-10-01

    The ethical issue of justification has become an urgent issue in radiology. There has been a shift in emphasis in the discussion from what has been regarded as a rather paternalistic attitude of practitioners to one that stresses the rights of the individual patient. This article comments on this current move on the part of the profession by offering certain relevant philosophical considerations. Using a medical scenario as the context to comment on this shift, it discusses important and fundamental issues, such as the autonomy and the rights of the patient in addition to the question of consent on the patient's part.

  12. JPRS Report Environmental Issues.

    Science.gov (United States)

    1990-04-10

    90-001 10 April 1990 NEAR EAST & SOUTH ASIA 11 PAKISTAN The consignment had been sent by a California-based company to Dubai where it was to be...reach an average of 31-36 tons per hectare per year, and fields that has evolved in the UkSSR. There is a very in the extremely wet years, on fields...work. one 60-watt bulb is turned off, the republic would And no matter how diverse the questions raised at it achieve a reduction in consumption of

  13. About this issue

    Directory of Open Access Journals (Sweden)

    Diane Mulligan

    2013-05-01

    Full Text Available I am delighted to have been asked to be the consulting editor for this special issue on disability and diversity. It covers a range of interesting articles that are relevant for anybody working in community eye health specifically, as well as in the health sector generally.

  14. A dividing issue

    DEFF Research Database (Denmark)

    Gamborg, Christian; Jensen, Frank Søndergaard; Sandøe, Peter

    2016-01-01

    . While there was broad agreement across all three groups that recreational hunting of naturally occurring “surplus” wildlife is acceptable, the release of farm-reared game birds for shooting was a dividing issue, both within the groups and between them. The majority of participants (51%) in the survey...

  15. Algeria: Current Issues

    Science.gov (United States)

    2011-04-13

    exports and a concomitant drop in revenues. An International Monetary Fund (IMF) evaluation in December 2010 concluded that the government’s expansionary ... Policy , coordinated by John Rollins. President Bouteflika’s tenure has produced an energized foreign policy . Strains in ties with neighboring Morocco...Issues for U.S. Policy ............................................................................................................3 Background

  16. Introduction: The Transparency Issue

    NARCIS (Netherlands)

    Teurlings, J.; Stauff, M.

    2014-01-01

    Besides giving an overview on the individual contributions, this introduction to the special issue on transparency delineates a conceptual context for a critical analysis of the contemporary discourse on transparency and the media mechanisms related to it. It focuses on three ambivalences inherent t

  17. Structuralist Performance Issue.

    Science.gov (United States)

    Kirby, Michael, Ed.

    1979-01-01

    Defining structuralism as an unannounced aesthetic movement that involves not only the theatre but all arts, this journal issue focuses on structuralist performance. The nine articles provide information on the following topics: the French theatre group, Atelier Theatre et Musique; "Tell Me," a play by Guy de Cointet; patterning in "Five…

  18. Workplace Diversity Issues.

    Science.gov (United States)

    1999

    This document contains three symposium papers on workplace diversity issues. "Expanding Theories of Career Development: Adding the Voices of African American Women in the White Academy" (Mary V. Alfred) questions the validity of existing career development models for women and minority groups and examines the professional development of five…

  19. JPRS Report, Proliferation Issues

    Science.gov (United States)

    2016-03-24

    All information has been obtained from foreign radio and television broadcasts, news agency transmissions, newspapers , books, and periodicals. Items...COMMERCE 8NATIONAL TECHNICAL INFORMATION SERVICE ’TIC Q.,’U ’ SPRINGFIELD, VA. 22161 PROLIFERATION ISSUES JPRS-TND-92-023 CONTENTS 16 July 1992 [This...Experts To Tour Azerbaijan ........................................................................................ 12 To Conduct Biochemical Analysis

  20. Introduction to special issue

    NARCIS (Netherlands)

    Ph.H.B.F. Franses (Philip Hans); R. Eisinga (Rob)

    2001-01-01

    textabstractIntroduces a series of articles on the analysis of cross sections. Issues involved in the analysis of time-series-cross-section (TSCS) data; Modeling of spatial effects, heterogeneity and TSCS data; Use of the Markov chain Monte Carlo and non-linear least-square methods for ecological in