WorldWideScience

Sample records for polar affairs population

  1. Comments to a polar bear population model

    OpenAIRE

    Øritsland, Nils Are

    1985-01-01

    Larsen, T. & Ugland, K. I. (Polar Research 2 n.s., 117-118) note correctly that a Leslie matrix model treats cubs and females as independent units which is not the case for polar bears. Population projections using the Leslie model with hunting mortalities added are instructive first approximations in evaluations of field data, however, and are recommended as exercises also for polar bear biologists. An APL programme for such projections is available.

  2. Gene transcription in polar bears (Ursus maritimus) from disparate populations

    Science.gov (United States)

    Bowen, Lizabeth; Miles, A. Keith; Waters, Shannon C.; Meyerson, Randi; Rode, Karyn D.; Atwood, Todd C.

    2015-01-01

    Polar bears in the Beaufort (SB) and Chukchi (CS) Seas experience different environments due primarily to a longer history of sea ice loss in the Beaufort Sea. Ecological differences have been identified as a possible reason for the generally poorer body condition and reproduction of Beaufort polar bears compared to those from the Chukchi, but the influence of exposure to other stressors remains unknown. We use molecular technology, quantitative PCR, to identify gene transcription differences among polar bears from the Beaufort and Chukchi Seas as well as captive healthy polar bears. We identified significant transcriptional differences among a priori groups (i.e., captive bears, SB 2012, SB 2013, CS 2013) for ten of the 14 genes of interest (i.e., CaM, HSP70, CCR3, TGFβ, COX2, THRα, T-bet, Gata3, CD69, and IL17); transcription levels of DRβ, IL1β, AHR, and Mx1 did not differ among groups. Multivariate analysis also demonstrated separation among the groups of polar bears. Specifically, we detected transcript profiles consistent with immune function impairment in polar bears from the Beaufort Sea, when compared with Chukchi and captive polar bears. Although there is no strong indication of differential exposure to contaminants or pathogens between CS and SB bears, there are clearly differences in important transcriptional responses between populations. Further investigation is warranted to refine interpretation of potential effects of described stress-related conditions for the SB population.

  3. Polar Bear Population Status in the Southern Beaufort Sea

    Science.gov (United States)

    Regehr, Eric V.; Amstrup, Steven C.; Stirling, Ian

    2006-01-01

    Polar bears depend entirely on sea ice for survival. In recent years, a warming climate has caused major changes in the Arctic sea ice environment, leading to concerns regarding the status of polar bear populations. Here we present findings from long-term studies of polar bears in the southern Beaufort Sea (SBS) region of the U.S. and Canada, which are relevant to these concerns. We applied open population capture-recapture models to data collected from 2001 to 2006, and estimated there were 1,526 (95% CI = 1,211; 1,841) polar bears in the SBS region in 2006. The number of polar bears in this region was previously estimated to be approximately 1,800. Because precision of earlier estimates was low, our current estimate of population size and the earlier ones cannot be statistically differentiated. For the 2001-06 period, the best fitting capture-recapture model provided estimates of total apparent survival of 0.43 for cubs of the year (COYs), and 0.92 for all polar bears older than COYs. Because the survival rates for older polar bears included multiple sex and age strata, they could not be compared to previous estimates. Survival rates for COYs, however, were significantly lower than estimates derived in earlier studies (P = 0.03). The lower survival of COYs was corroborated by a comparison of the number of COYs per adult female for periods before (1967-89) and after (1990-2006) the winter of 1989-90, when warming temperatures and altered atmospheric circulation caused an abrupt change in sea ice conditions in the Arctic basin. In the latter period, there were significantly more COYs per adult female in the spring (P = 0.02), and significantly fewer COYs per adult female in the autumn (P adult males captured from 1990 to 2006 were smaller than those captured before 1990. The smaller stature of males was especially notable because it corresponded with a higher mean age of adult males. Male polar bears continue to grow into their teens, and if adequately nourished

  4. Euphausiid population structure and grazing in the Antarctic Polar ...

    African Journals Online (AJOL)

    The daily ration estimates of autotrophic carbon for the euphausiids suggest that phytoplankton represent a minor component in their diets, with only the sub-adult E. vallentini consuming sufficient phytoplankton to meet their daily carbon requirements. Keywords: euphausiid; ingestion; Polar Frontal Zone; population ...

  5. Climate change threatens polar bear populations: a stochastic demographic analysis.

    Science.gov (United States)

    Hunter, Christine M; Caswell, Hal; Runge, Michael C; Regehr, Eric V; Amstrup, Steve C; Stirling, Ian

    2010-10-01

    The polar bear (Ursus maritimus) depends on sea ice for feeding, breeding, and movement. Significant reductions in Arctic sea ice are forecast to continue because of climate warming. We evaluated the impacts of climate change on polar bears in the southern Beaufort Sea by means of a demographic analysis, combining deterministic, stochastic, environment-dependent matrix population models with forecasts of future sea ice conditions from IPCC general circulation models (GCMs). The matrix population models classified individuals by age and breeding status; mothers and dependent cubs were treated as units. Parameter estimates were obtained from a capture-recapture study conducted from 2001 to 2006. Candidate statistical models allowed vital rates to vary with time and as functions of a sea ice covariate. Model averaging was used to produce the vital rate estimates, and a parametric bootstrap procedure was used to quantify model selection and parameter estimation uncertainty. Deterministic models projected population growth in years with more extensive ice coverage (2001-2003) and population decline in years with less ice coverage (2004-2005). LTRE (life table response experiment) analysis showed that the reduction in lambda in years with low sea ice was due primarily to reduced adult female survival, and secondarily to reduced breeding. A stochastic model with two environmental states, good and poor sea ice conditions, projected a declining stochastic growth rate, log lambdas, as the frequency of poor ice years increased. The observed frequency of poor ice years since 1979 would imply log lambdas approximately - 0.01, which agrees with available (albeit crude) observations of population size. The stochastic model was linked to a set of 10 GCMs compiled by the IPCC; the models were chosen for their ability to reproduce historical observations of sea ice and were forced with "business as usual" (A1B) greenhouse gas emissions. The resulting stochastic population

  6. Climate change threatens polar bear populations: A stochastic demographic analysis

    Science.gov (United States)

    Hunter, C.M.; Caswell, H.; Runge, M.C.; Regehr, E.V.; Amstrup, Steven C.; Stirling, I.

    2010-01-01

    The polar bear (Ursus maritimus) depends on sea ice for feeding, breeding, and movement. Significant reductions in Arctic sea ice are forecast to continue because of climate warming. We evaluated the impacts of climate change on polar bears in the southern Beaufort Sea by means of a demographic analysis, combining deterministic, stochastic, environment-dependent matrix population models with forecasts of future sea ice conditions from IPCC general circulation models (GCMs). The matrix population models classified individuals by age and breeding status; mothers and dependent cubs were treated as units. Parameter estimates were obtained from a capture-recapture study conducted from 2001 to 2006. Candidate statistical models allowed vital rates to vary with time and as functions of a sea ice covariate. Model averaging was used to produce the vital rate estimates, and a parametric bootstrap procedure was used to quantify model selection and parameter estimation uncertainty. Deterministic models projected population growth in years with more extensive ice coverage (2001-2003) and population decline in years with less ice coverage (2004-2005). LTRE (life table response experiment) analysis showed that the reduction in ?? in years with low sea ice was due primarily to reduced adult female survival, and secondarily to reduced breeding. A stochastic model with two environmental states, good and poor sea ice conditions, projected a declining stochastic growth rate, log ??s, as the frequency of poor ice years increased. The observed frequency of poor ice years since 1979 would imply log ??s ' - 0.01, which agrees with available (albeit crude) observations of population size. The stochastic model was linked to a set of 10 GCMs compiled by the IPCC; the models were chosen for their ability to reproduce historical observations of sea ice and were forced with "business as usual" (A1B) greenhouse gas emissions. The resulting stochastic population projections showed drastic

  7. Generation time and effective population size in Polar Eskimos

    Science.gov (United States)

    Matsumura, Shuichi; Forster, Peter

    2008-01-01

    North Greenland Polar Eskimos are the only hunter–gatherer population, to our knowledge, who can offer precise genealogical records spanning several generations. This is the first report from Eskimos on two key parameters in population genetics, namely, generation time (T) and effective population size (Ne). The average mother–daughter and father–son intervals were 27 and 32 years, respectively, roughly similar to the previously published generation times obtained from recent agricultural societies across the world. To gain an insight for the generation time in our distant ancestors, we calculated maternal generation time for two wild chimpanzee populations. We also provide the first comparison among three distinct approaches (genealogy, variance and life table methods) for calculating Ne, which resulted in slightly differing values for the Eskimos. The ratio of the effective to the census population size is estimated as 0.6–0.7 for autosomal and X-chromosomal DNA, 0.7–0.9 for mitochondrial DNA and 0.5 for Y-chromosomal DNA. A simulation of alleles along the genealogy suggested that Y-chromosomal DNA may drift a little faster than mitochondrial DNA in this population, in contrast to agricultural Icelanders. Our values will be useful not only in prehistoric population inference but also in understanding the shaping of our genome today. PMID:18364314

  8. Population policies in Southeast Asia and Australia: the international relevance of domestic affairs.

    Science.gov (United States)

    Jones, G W

    1984-01-01

    There are 2 underlying themes to this paper: national perceptions of population circumstances at home and abroad are the crucial determinants of population policies adopted, and the differences in perceptions help explain why national reactions differ to circumtances which appear similar; and population policy, though an internal matter, has international repercussions and thus can become a sensitive issue in international relations. Until recently, ASEAN countries were united with Vietnam on at least 1 issue: attitudes toward the growth and changing distribution of their populations. The objectives were slower growth through lowered fertility, resistance to immigration from abroad except in very special circumstances, resettlement of population to undeveloped areas with potential for agriculture, and slowing the growth of big cities. The Australian situation differed. As a high income nation populated primarily through immigration and set in a region of far more populous and densely settled nations, Australia's policy favored population growth and used an immigration program as a way to realize this end. Yet, even so, population growth in most postwar years was slower than that of all Southeast Asian nations. And, although immigration was encouraged, the resistance to immigration that characterized Southeast Asian countries was shared by Australia with respect to all but North Western Europeans, an "acceptable" category progressively widened by dint of curcumstances to include Eastern Europeans, then Southern Europeans, then certain Middle Eastern peoples, and finally Asians and Latin Americans. Australia shared with Southeast Asian nations the concern with big-city growth and like the Southeast Asian nations searched for appropriate policies to contain this growth and promote that of smaller cities and towns. This search stopped in the 1970s when the report of the National Population showed that accepted projections of the populations of Sydney and Melbourne had

  9. Current and Projected Characteristics and Unique Health Care Needs of the Patient Population Served by the Department of Veterans Affairs.

    Science.gov (United States)

    Eibner, Christine; Krull, Heather; Brown, Kristine M; Cefalu, Matthew; Mulcahy, Andrew W; Pollard, Michael; Shetty, Kanaka; Adamson, David M; Amaral, Ernesto F L; Armour, Philip; Beleche, Trinidad; Bogdan, Olena; Hastings, Jaime; Kapinos, Kandice; Kress, Amii; Mendelsohn, Joshua; Ross, Rachel; Rutter, Carolyn M; Weinick, Robin M; Woods, Dulani; Hosek, Susan D; Farmer, Carrie M

    2016-05-09

    The Veterans Access, Choice, and Accountability Act of 2014 addressed the need for access to timely, high-quality health care for veterans. Section 201 of the legislation called for an independent assessment of various aspects of veterans' health care. The RAND Corporation was tasked with an assessment of the current and projected demographics and health care needs of patients served by the Department of Veterans Affairs (VA). The number of U.S. veterans will continue to decline over the next decade, and the demographic mix and geographic locations of these veterans will change. While the number of veterans using VA health care has increased over time, demand will level off in the coming years. Veterans have more favorable economic circumstances than non-veterans, but they are also older and more likely to be diagnosed with many health conditions. Not all veterans are eligible for or use VA health care. Whether and to what extent an eligible veteran uses VA health care depends on a number of factors, including access to other sources of health care. Veterans who rely on VA health care are older and less healthy than veterans who do not, and the prevalence of costly conditions in this population is projected to increase. Potential changes to VA policy and the context for VA health care, including effects of the Affordable Care Act, could affect demand. Analysis of a range of data sources provided insight into how the veteran population is likely to change in the next decade.

  10. Current and Projected Characteristics and Unique Health Care Needs of the Patient Population Served by the Department of Veterans Affairs

    Science.gov (United States)

    Eibner, Christine; Krull, Heather; Brown, Kristine M.; Cefalu, Matthew; Mulcahy, Andrew W.; Pollard, Michael; Shetty, Kanaka; Adamson, David M.; Amaral, Ernesto F. L.; Armour, Philip; Beleche, Trinidad; Bogdan, Olena; Hastings, Jaime; Kapinos, Kandice; Kress, Amii; Mendelsohn, Joshua; Ross, Rachel; Rutter, Carolyn M.; Weinick, Robin M.; Woods, Dulani; Hosek, Susan D.; Farmer, Carrie M.

    2016-01-01

    Abstract The Veterans Access, Choice, and Accountability Act of 2014 addressed the need for access to timely, high-quality health care for veterans. Section 201 of the legislation called for an independent assessment of various aspects of veterans' health care. The RAND Corporation was tasked with an assessment of the current and projected demographics and health care needs of patients served by the Department of Veterans Affairs (VA). The number of U.S. veterans will continue to decline over the next decade, and the demographic mix and geographic locations of these veterans will change. While the number of veterans using VA health care has increased over time, demand will level off in the coming years. Veterans have more favorable economic circumstances than non-veterans, but they are also older and more likely to be diagnosed with many health conditions. Not all veterans are eligible for or use VA health care. Whether and to what extent an eligible veteran uses VA health care depends on a number of factors, including access to other sources of health care. Veterans who rely on VA health care are older and less healthy than veterans who do not, and the prevalence of costly conditions in this population is projected to increase. Potential changes to VA policy and the context for VA health care, including effects of the Affordable Care Act, could affect demand. Analysis of a range of data sources provided insight into how the veteran population is likely to change in the next decade. PMID:28083423

  11. Circumpolar contaminant concentrations in polar bears (Ursus maritimus) and potential population-level effects

    NARCIS (Netherlands)

    Nuijten, R.J.M.; Hendriks, A.J.; Jenssen, B.M.; Schipper, A.M.

    2016-01-01

    Abstract Polar bears (Ursus maritimus) currently receive much attention in the context of global climate change. However, there are other stressors that might threaten the viability of polar bear populations as well, such as exposure to anthropogenic pollutants. Lipophilic organic compounds

  12. Demography and population status of polar bears in western Hudson Bay

    Science.gov (United States)

    Lunn, Nicholas J.; Regher, Eric V; Servanty, Sabrina; Converse, Sarah J.; Richardson, Evan S.; Stirling, Ian

    2013-01-01

    We evaluated the demography and population status of the Western Hudson Bay (WH) polar bear subpopulation for the period 1984-2011, using live-recapture data from research studies and management actions, and dead-recovery data from polar bears harvested for subsistence purposes or removed during human-bear conflicts.

  13. Population genomics reveal recent speciation and rapid evolutionary adaptation in polar bears

    DEFF Research Database (Denmark)

    Liu, Shiping; Lorenzen, Eline; Fumagalli, Matteo

    2014-01-01

    Polar bears are uniquely adapted to life in the High Arctic and have undergone drastic physiological changes in response to Arctic climates and a hyperlipid diet of primarily marine mammal prey. We analyzed 89 complete genomes of polar bear and brown bear using population genomic modeling and sho...

  14. A tale of two polar bear populations: Ice habitat, harvest, and body condition

    Science.gov (United States)

    Rode, Karyn D.; Peacock, Elizabeth; Taylor, Mitchell K.; Stirling, Ian; Born, Erik W.; Laidre, Kristin L.; Wiig, Øystein

    2012-01-01

    One of the primary mechanisms by which sea ice loss is expected to affect polar bears is via reduced body condition and growth resulting from reduced access to prey. To date, negative effects of sea ice loss have been documented for two of 19 recognized populations. Effects of sea ice loss on other polar bear populations that differ in harvest rate, population density, and/or feeding ecology have been assumed, but empirical support, especially quantitative data on population size, demography, and/or body condition spanning two or more decades, have been lacking. We examined trends in body condition metrics of captured bears and relationships with summertime ice concentration between 1977 and 2010 for the Baffin Bay (BB) and Davis Strait (DS) polar bear populations. Polar bears in these regions occupy areas with annual sea ice that has decreased markedly starting in the 1990s. Despite differences in harvest rate, population density, sea ice concentration, and prey base, polar bears in both populations exhibited positive relationships between body condition and summertime sea ice cover during the recent period of sea ice decline. Furthermore, females and cubs exhibited relationships with sea ice that were not apparent during the earlier period (1977–1990s) when sea ice loss did not occur. We suggest that declining body condition in BB may be a result of recent declines in sea ice habitat. In DS, high population density and/or sea ice loss, may be responsible for the declines in body condition.

  15. Genomic evidence for island population conversion resolves conflicting theories of polar bear evolution.

    Science.gov (United States)

    Cahill, James A; Green, Richard E; Fulton, Tara L; Stiller, Mathias; Jay, Flora; Ovsyanikov, Nikita; Salamzade, Rauf; St John, John; Stirling, Ian; Slatkin, Montgomery; Shapiro, Beth

    2013-01-01

    Despite extensive genetic analysis, the evolutionary relationship between polar bears (Ursus maritimus) and brown bears (U. arctos) remains unclear. The two most recent comprehensive reports indicate a recent divergence with little subsequent admixture or a much more ancient divergence followed by extensive admixture. At the center of this controversy are the Alaskan ABC Islands brown bears that show evidence of shared ancestry with polar bears. We present an analysis of genome-wide sequence data for seven polar bears, one ABC Islands brown bear, one mainland Alaskan brown bear, and a black bear (U. americanus), plus recently published datasets from other bears. Surprisingly, we find clear evidence for gene flow from polar bears into ABC Islands brown bears but no evidence of gene flow from brown bears into polar bears. Importantly, while polar bears contributed bear, they contributed 6.5% of the X chromosome. The magnitude of sex-biased polar bear ancestry and the clear direction of gene flow suggest a model wherein the enigmatic ABC Island brown bears are the descendants of a polar bear population that was gradually converted into brown bears via male-dominated brown bear admixture. We present a model that reconciles heretofore conflicting genetic observations. We posit that the enigmatic ABC Islands brown bears derive from a population of polar bears likely stranded by the receding ice at the end of the last glacial period. Since then, male brown bear migration onto the island has gradually converted these bears into an admixed population whose phenotype and genotype are principally brown bear, except at mtDNA and X-linked loci. This process of genome erosion and conversion may be a common outcome when climate change or other forces cause a population to become isolated and then overrun by species with which it can hybridize.

  16. Genomic evidence for island population conversion resolves conflicting theories of polar bear evolution.

    Directory of Open Access Journals (Sweden)

    James A Cahill

    Full Text Available Despite extensive genetic analysis, the evolutionary relationship between polar bears (Ursus maritimus and brown bears (U. arctos remains unclear. The two most recent comprehensive reports indicate a recent divergence with little subsequent admixture or a much more ancient divergence followed by extensive admixture. At the center of this controversy are the Alaskan ABC Islands brown bears that show evidence of shared ancestry with polar bears. We present an analysis of genome-wide sequence data for seven polar bears, one ABC Islands brown bear, one mainland Alaskan brown bear, and a black bear (U. americanus, plus recently published datasets from other bears. Surprisingly, we find clear evidence for gene flow from polar bears into ABC Islands brown bears but no evidence of gene flow from brown bears into polar bears. Importantly, while polar bears contributed <1% of the autosomal genome of the ABC Islands brown bear, they contributed 6.5% of the X chromosome. The magnitude of sex-biased polar bear ancestry and the clear direction of gene flow suggest a model wherein the enigmatic ABC Island brown bears are the descendants of a polar bear population that was gradually converted into brown bears via male-dominated brown bear admixture. We present a model that reconciles heretofore conflicting genetic observations. We posit that the enigmatic ABC Islands brown bears derive from a population of polar bears likely stranded by the receding ice at the end of the last glacial period. Since then, male brown bear migration onto the island has gradually converted these bears into an admixed population whose phenotype and genotype are principally brown bear, except at mtDNA and X-linked loci. This process of genome erosion and conversion may be a common outcome when climate change or other forces cause a population to become isolated and then overrun by species with which it can hybridize.

  17. Barents Sea polar bears (Ursus maritimus: population biology and anthropogenic threats

    Directory of Open Access Journals (Sweden)

    Magnus Andersen

    2016-07-01

    Full Text Available This paper examines how anthropogenic threats, such as disturbance, pollution and climate change, are linked to polar bear (Ursus maritimus population biology in the Svalbard and Barents Sea area, with the aim to increase our understanding of how human activity may impact the population. Overharvesting drastically reduced the population of polar bears in the Barents Sea region from about 1870 to 1970. After harvesting was stopped—in 1956 in Russia and 1973 in Norway—the population grew to an estimated 2650 individuals (95% confidence interval 1900–3600 in 2004, and maternity denning in the Svalbard Archipelago became more widely distributed. During recent decades, the population has faced challenges from a variety of new anthropogenic impacts: a range of pollutants, an increasing level of human presence and activity as well as changes in ice conditions. Contaminants bioaccumulate up through the marine food web, culminating in this top predator that consumes ringed, bearded and harp seals. Females with small cubs use land-fast sea ice for hunting and are therefore vulnerable to disturbance by snowmobile drivers. Sea-ice diminution, associated with climate change, reduces polar bears’ access to denning areas and could negatively affect the survival of cubs. There are clear linkages between population biology and current anthropogenic threats, and we suggest that future research and management should focus on and take into consideration the combined effects of several stressors on polar bears.

  18. Polar bear population status in the northern Beaufort Sea, Canada, 1971-2006.

    Science.gov (United States)

    Stirling, Ian; McDonald, Trent L; Richardson, E S; Regehr, Eric V; Amstrup, Steven C

    2011-04-01

    Polar bears (Ursus maritimus) of the northern Beaufort Sea (NB) population occur on the perimeter of the polar basin adjacent to the northwestern islands of the Canadian Arctic Archipelago. Sea ice converges on the islands through most of the year. We used open-population capture-recapture models to estimate population size and vital rates of polar bears between 1971 and 2006 to: (1) assess relationships between survival, sex and age, and time period; (2) evaluate the long-term importance of sea ice quality and availability in relation to climate warming; and (3) note future management and conservation concerns. The highest-ranking models suggested that survival of polar bears varied by age class and with changes in the sea ice habitat. Model-averaged estimates of survival (which include harvest mortality) for senescent adults ranged from 0.37 to 0.62, from 0.22 to 0.68 for cubs of the year (COY) and yearlings, and from 0.77 to 0.92 for 2-4 year-olds and adults. Horvtiz-Thompson (HT) estimates of population size were not significantly different among the decades of our study. The population size estimated for the 2000s was 980 +/- 155 (mean and 95% CI). These estimates apply primarily to that segment of the NB population residing west and south of Banks Island. The NB polar bear population appears to have been stable or possibly increasing slightly during the period of our study. This suggests that ice conditions have remained suitable and similar for feeding in summer and fall during most years and that the traditional and legal Inuvialuit harvest has not exceeded sustainable levels. However, the amount of ice remaining in the study area at the end of summer, and the proportion that continues to lie over the biologically productive continental shelf (polar bear population in the northern Beaufort Sea will eventually decline. Management and conservation practices for polar bears in relation to both aboriginal harvesting and offshore industrial activity will need to

  19. Polar bear population status in the northern Beaufort Sea, Canada, 1971-2006

    Science.gov (United States)

    Stirling, I.; McDonald, T.L.; Richardson, E.S.; Regehr, E.V.; Amstrup, Steven C.

    2011-01-01

    Polar bears (Ursus maritimus) of the northern Beaufort Sea (NB) population occur on the perimeter of the polar basin adjacent to the northwestern islands of the Canadian Arctic Archipelago. Sea ice converges on the islands through most of the year. We used open-population capture–recapture models to estimate population size and vital rates of polar bears between 1971 and 2006 to: (1) assess relationships between survival, sex and age, and time period; (2) evaluate the long-term importance of sea ice quality and availability in relation to climate warming; and (3) note future management and conservation concerns. The highest-ranking models suggested that survival of polar bears varied by age class and with changes in the sea ice habitat. Model-averaged estimates of survival (which include harvest mortality) for senescent adults ranged from 0.37 to 0.62, from 0.22 to 0.68 for cubs of the year (COY) and yearlings, and from 0.77 to 0.92 for 2–4 year-olds and adults. Horvtiz-Thompson (HT) estimates of population size were not significantly different among the decades of our study. The population size estimated for the 2000s was 980 ± 155 (mean and 95% CI). These estimates apply primarily to that segment of the NB population residing west and south of Banks Island. The NB polar bear population appears to have been stable or possibly increasing slightly during the period of our study. This suggests that ice conditions have remained suitable and similar for feeding in summer and fall during most years and that the traditional and legal Inuvialuit harvest has not exceeded sustainable levels. However, the amount of ice remaining in the study area at the end of summer, and the proportion that continues to lie over the biologically productive continental shelf (polar bear population in the northern Beaufort Sea will eventually decline. Management and conservation practices for polar bears in relation to both aboriginal harvesting and offshore industrial activity will need

  20. Population ecology of polar bears in Davis Strait, Canada and Greenland

    Science.gov (United States)

    Peacock, Elizabeth; Taylor, Mitchell K.; Laake, Jeffrey L.; Stirling, Ian

    2013-01-01

    Until recently, the sea ice habitat of polar bears was understood to be variable, but environmental variability was considered to be cyclic or random, rather than progressive. Harvested populations were believed to be at levels where density effects were considered not significant. However, because we now understand that polar bear demography can also be influenced by progressive change in the environment, and some populations have increased to greater densities than historically lower numbers, a broader suite of factors should be considered in demographic studies and management. We analyzed 35 years of capture and harvest data from the polar bear (Ursus maritimus) subpopulation in Davis Strait, including data from a new study (2005–2007), to quantify its current demography. We estimated the population size in 2007 to be 2,158 ± 180 (SE), a likely increase from the 1970s. We detected variation in survival, reproductive rates, and age-structure of polar bears from geographic sub-regions. Survival and reproduction of bears in southern Davis Strait was greater than in the north and tied to a concurrent dramatic increase in breeding harp seals (Pagophilus groenlandicus) in Labrador. The most supported survival models contained geographic and temporal variables. Harp seal abundance was significantly related to polar bear survival. Our estimates of declining harvest recovery rate, and increasing total survival, suggest that the rate of harvest declined over time. Low recruitment rates, average adult survival rates, and high population density, in an environment of high prey density, but deteriorating and variable ice conditions, currently characterize the Davis Strait polar bears. Low reproductive rates may reflect negative effects of greater densities or worsening ice conditions.

  1. Marine foraging and annual fish consumption of a south polar Skua population in the maritime Antarctic

    NARCIS (Netherlands)

    Hahn, S.M.; Ritz, M.S.; Reinhardt, K.

    2008-01-01

    Pelagic fish are an important component of Antarctic food webs but few quantitative data exist on energy transfer from fish to seabirds for the Seasonal Pack-ice Zone. We studied a local population of south polar, skuas Catharacta maccormicki during a whole breeding cycle and estimated its entire

  2. Analytical Solutions of Temporal Evolution of Populations in Optically-Pumped Atoms with Circularly Polarized Light

    Directory of Open Access Journals (Sweden)

    Heung-Ryoul Noh

    2016-03-01

    Full Text Available We present an analytical calculation of temporal evolution of populations for optically pumped atoms under the influence of weak, circularly polarized light. The differential equations for the populations of magnetic sublevels in the excited state, derived from rate equations, are expressed in the form of inhomogeneous second-order differential equations with constant coefficients. We present a general method of analytically solving these differential equations, and obtain explicit analytical forms of the populations of the ground state at the lowest order in the saturation parameter. The obtained populations can be used to calculate lineshapes in various laser spectroscopies, considering transit time relaxation.

  3. Current and Projected Characteristics and Unique Health Care Needs of the Patient Population Served by the Department of Veterans Affairs

    OpenAIRE

    Eibner, Christine; Krull, Heather; Brown, Kristine M.; Cefalu, Matthew; Mulcahy, Andrew W.; Pollard, Michael; Shetty, Kanaka; Adamson, David M.; Amaral, Ernesto F. L.; Armour, Philip; Beleche, Trinidad; Bogdan, Olena; Hastings, Jaime; Kapinos, Kandice; Kress, Amii

    2016-01-01

    The Veterans Access, Choice, and Accountability Act of 2014 addressed the need for access to timely, high-quality health care for veterans. Section 201 of the legislation called for an independent assessment of various aspects of veterans' health care. The RAND Corporation was tasked with an assessment of the current and projected demographics and health care needs of patients served by the Department of Veterans Affairs (VA). The number of U.S. veterans will continue to decline over the next...

  4. Polar bear population status in the northern Beaufort Sea, Canada, 1971-2006

    Science.gov (United States)

    Stirling, I.; McDonald, T.L.; Richardson, E.S.; Regehr, E.V.; Amstrup, Steven C.

    2011-01-01

    Polar bears (Ursus maritimus) of the northern Beaufort Sea (NB) population occur on the perimeter of the polar basin adjacent to the northwestern islands of the Canadian Arctic Archipelago. Sea ice converges on the islands through most of the year. We used open-population capture–recapture models to estimate population size and vital rates of polar bears between 1971 and 2006 to: (1) assess relationships between survival, sex and age, and time period; (2) evaluate the long-term importance of sea ice quality and availability in relation to climate warming; and (3) note future management and conservation concerns. The highest-ranking models suggested that survival of polar bears varied by age class and with changes in the sea ice habitat. Model-averaged estimates of survival (which include harvest mortality) for senescent adults ranged from 0.37 to 0.62, from 0.22 to 0.68 for cubs of the year (COY) and yearlings, and from 0.77 to 0.92 for 2–4 year-olds and adults. Horvtiz-Thompson (HT) estimates of population size were not significantly different among the decades of our study. The population size estimated for the 2000s was 980 ± 155 (mean and 95% CI). These estimates apply primarily to that segment of the NB population residing west and south of Banks Island. The NB polar bear population appears to have been stable or possibly increasing slightly during the period of our study. This suggests that ice conditions have remained suitable and similar for feeding in summer and fall during most years and that the traditional and legal Inuvialuit harvest has not exceeded sustainable levels. However, the amount of ice remaining in the study area at the end of summer, and the proportion that continues to lie over the biologically productive continental shelf (Sea will eventually decline. Management and conservation practices for polar bears in relation to both aboriginal harvesting and offshore industrial activity will need to adapt.

  5. Climate change and the increasing impact of polar bears on bird populations

    Directory of Open Access Journals (Sweden)

    Jouke eProp

    2015-03-01

    Full Text Available The Arctic is becoming warmer at a high rate, and contractions in the extent of sea ice are currently changing the habitats of marine top-predators dependent on ice. Polar bears (Ursus maritimus depend on sea ice for hunting seals. For these top-predators, longer ice-free seasons are hypothesized to force the bears to hunt for alternative terrestrial food, such as eggs from colonial breeding birds. We analyzed time-series of polar bear observations at four locations on Spitsbergen (Svalbard and one in east Greenland. Summer occurrence of polar bears, measured as the probability of encountering bears and the number of days with bear presence, has increased significantly from the 1970/80s to the present. The shifts in polar bear occurrence coincided with trends for shorter sea ice seasons and less sea ice during the spring in the study area. This resulted in a strong inverse relationship between the probability of bear encounters on land and the length of the sea ice season. Within ten years after their first appearance on land, polar bears had advanced their arrival dates by almost 30 days. Direct observations of nest predation showed that polar bears may severely affect reproductive success of the barnacle goose (Branta leucopsis, common eider (Somateria mollissima and glaucous gull (Larus hyperboreus. Nest predation was strongest in years when the polar bears arrived well before hatch, with more than 90% of all nests being predated. The results are similar to findings from Canada, and large-scale processes, such as climate and subsequent habitat changes, are pinpointed as the most likely drivers in various parts of the Arctic. We suggest that the increasing, earlier appearance of bears on land in summer reflects behavioral adaptations by a small segment of the population to cope with a reduced hunting range on sea ice. This exemplifies how behavioral adaptations may contribute to the cascading effects of climate change.

  6. Monitoring the welfare of polar bear populations in a rapidly changing Arctic

    Science.gov (United States)

    Atwood, Todd C.; Duncan, Colleen G.; Patyk, Kelly A.; Sonsthagen, Sarah A.

    2017-01-01

    Most programs for monitoring the welfare of wildlife populations support efforts aimed at reaching discrete management objectives, like mitigating conflict with humans. While such programs can be effective, their limited scope may preclude systemic evaluations needed for large-scale conservation initiatives, like the recovery of at-risk species. We discuss select categories of metrics that can be used to monitor how polar bears (Ursus maritimus) are responding to the primary threat to their long-term persistence—loss of sea ice habitat due to the unabated rise in atmospheric greenhouse gas (GHG; e.g., CO2) concentrations—that can also provide information on ecosystem function and health. Monitoring key aspects of polar bear population dynamics, spatial behavior, health and resiliency can provide valuable insight into ecosystem state and function, and could be a powerful tool for achieving Arctic conservation objectives, particularly those that have transnational policy implications.

  7. Polar bear population dynamics in the southern Beaufort Sea during a period of sea ice decline.

    Science.gov (United States)

    Bromaghin, Jeffrey F; Mcdonald, Trent L; Stirling, Ian; Derocher, Andrew E; Richardson, Evan S; Regehr, Eric V; Douglas, David C; Durner, George M; Atwood, Todd; Amstrup, Steven C

    2015-04-01

    In the southern Beaufort Sea of the United States and Canada, prior investigations have linked declines in summer sea ice to reduced physical condition, growth, and survival of polar bears (Ursus maritimus). Combined with projections of population decline due to continued climate warming and the ensuing loss of sea ice habitat, those findings contributed to the 2008 decision to list the species as threatened under the U.S. Endangered Species Act. Here, we used mark-recapture models to investigate the population dynamics of polar bears in the southern Beaufort Sea from 2001 to 2010, years during which the spatial and temporal extent of summer sea ice generally declined. Low survival from 2004 through 2006 led to a 25-50% decline in abundance. We hypothesize that low survival during this period resulted from (1) unfavorable ice conditions that limited access to prey during multiple seasons; and possibly, (2) low prey abundance. For reasons that are not clear, survival of adults and cubs began to improve in 2007 and abundance was comparatively stable from 2008 to 2010, with ~900 bears in 2010 (90% CI 606-1212). However, survival of subadult bears declined throughout the entire period. Reduced spatial and temporal availability of sea ice is expected to increasingly force population dynamics of polar bears as the climate continues to warm. However, in the short term, our findings suggest that factors other than sea ice can influence survival. A refined understanding of the ecological mechanisms underlying polar bear population dynamics is necessary to improve projections of their future status and facilitate development of management strategies.

  8. Polar bear population dynamics in the southern Beaufort Sea during a period of sea ice decline

    Science.gov (United States)

    Bromaghin, Jeffrey F.; McDonald, Trent L.; Stirling, Ian; Derocher, Andrew E.; Richardson, Evan S.; Regehr, Eric V.; Douglas, David C.; Durner, George M.; Atwood, Todd C.; Amstrup, Steven C.

    2015-01-01

    In the southern Beaufort Sea of the United States and Canada, prior investigations have linked declines in summer sea ice to reduced physical condition, growth, and survival of polar bears (Ursus maritimus). Combined with projections of population decline due to continued climate warming and the ensuing loss of sea ice habitat, those findings contributed to the 2008 decision to list the species as threatened under the U.S. Endangered Species Act. Here, we used mark–recapture models to investigate the population dynamics of polar bears in the southern Beaufort Sea from 2001 to 2010, years during which the spatial and temporal extent of summer sea ice generally declined. Low survival from 2004 through 2006 led to a 25–50% decline in abundance. We hypothesize that low survival during this period resulted from (1) unfavorable ice conditions that limited access to prey during multiple seasons; and possibly, (2) low prey abundance. For reasons that are not clear, survival of adults and cubs began to improve in 2007 and abundance was comparatively stable from 2008 to 2010, with ~900 bears in 2010 (90% CI 606–1212). However, survival of subadult bears declined throughout the entire period. Reduced spatial and temporal availability of sea ice is expected to increasingly force population dynamics of polar bears as the climate continues to warm. However, in the short term, our findings suggest that factors other than sea ice can influence survival. A refined understanding of the ecological mechanisms underlying polar bear population dynamics is necessary to improve projections of their future status and facilitate development of management strategies.

  9. Using satellite telemetry to define spatial population structure in polar bears in the Norwegian and western Russian Arctic

    Science.gov (United States)

    Mauritzen, Mette; Derocher, Andrew E.; Wiig, Øystein; Belikov, Stanislav; Boltunov, Andrei N.; Garner, Gerald W.

    2002-01-01

    1. Animal populations, defined by geographical areas within a species’ distribution where population dynamics are largely regulated by births and deaths rather than by migration from surrounding areas, may be the correct unit for wildlife management. However, in heterogeneous landscapes varying habitat quality may yield subpopulations with distinct patterns in resource use and demography significant to the dynamics of populations.2. To define the spatial population structure of polar bears Ursus maritimus in the Norwegian and western Russian Arctic, and to assess the existence of a shared population between the two countries, we analysed satellite telemetry data obtained from 105 female polar bears over 12 years.3. Using both cluster analyses and home-range estimation methods, we identified five population units inhabiting areas with different sea-ice characteristics and prey availability.4. The continuous distribution of polar bear positions indicated that the different subpopulations formed one continuous polar bear population in the Norwegian and western Russian Arctic. Hence, Norway and Russia have a shared management responsibility.5. The spatial population structure identified will provide a guide for evaluating geographical patterns in polar bear ecology, the dynamics of polar bear–seal relationships and the effects of habitat alteration due to climate change. The work illustrates the importance of defining population borders and subpopulation structure in understanding the dynamics and management of larger animals.

  10. Population genomics reveal recent speciation and rapid evolutionary adaptation in polar bears.

    Science.gov (United States)

    Liu, Shiping; Lorenzen, Eline D; Fumagalli, Matteo; Li, Bo; Harris, Kelley; Xiong, Zijun; Zhou, Long; Korneliussen, Thorfinn Sand; Somel, Mehmet; Babbitt, Courtney; Wray, Greg; Li, Jianwen; He, Weiming; Wang, Zhuo; Fu, Wenjing; Xiang, Xueyan; Morgan, Claire C; Doherty, Aoife; O'Connell, Mary J; McInerney, James O; Born, Erik W; Dalén, Love; Dietz, Rune; Orlando, Ludovic; Sonne, Christian; Zhang, Guojie; Nielsen, Rasmus; Willerslev, Eske; Wang, Jun

    2014-05-08

    Polar bears are uniquely adapted to life in the High Arctic and have undergone drastic physiological changes in response to Arctic climates and a hyper-lipid diet of primarily marine mammal prey. We analyzed 89 complete genomes of polar bear and brown bear using population genomic modeling and show that the species diverged only 479-343 thousand years BP. We find that genes on the polar bear lineage have been under stronger positive selection than in brown bears; nine of the top 16 genes under strong positive selection are associated with cardiomyopathy and vascular disease, implying important reorganization of the cardiovascular system. One of the genes showing the strongest evidence of selection, APOB, encodes the primary lipoprotein component of low-density lipoprotein (LDL); functional mutations in APOB may explain how polar bears are able to cope with life-long elevated LDL levels that are associated with high risk of heart disease in humans. Copyright © 2014 Elsevier Inc. All rights reserved.

  11. Distinct ion population in the polar cusp: possible signature of transient reconnection

    International Nuclear Information System (INIS)

    Escoubet, C.P.; Smith, M.F.; Bosqued, J.M.

    1992-01-01

    Observations of ion energy dispersion are a common feature of the polar cusp. Normally these dispersions show a continuous decrease in energy. However, they occasionally show step-like features in the dispersion. On 15 October 1981 Dynamics Explorer 2 (DE2) crossed the polar cusp at 1015 MLT and observed three distinct ion populations as the spacecraft moved poleward. These three populations had peak-flux energy around 2.7 keV, 850 eV and 360 eV. The first step coincided with a rotation of the flow; the flow being directed westward on the equatorward edge, poleward in the center and eastward on the poleward edge. The second and third steps showed a flow directed principally poleward. Furthermore, the magnetic and electric perturbations in the first step are well fitted by an elongated FTE footprint model. These results suggest that three consecutive Flux Transfer Events (FTEs) have injected solar wind plasma into the ionosphere forming the polar cusp. The small latitudinal size of these FTE footprints (∼ 40 km) and their short recurrence rate (3 and 6 min) would be consistent with an intermittent reconnection taking place at the subsolar point on a short time scale

  12. China Report, Economic Affairs

    National Research Council Canada - National Science Library

    1987-01-01

    .... This report contains articles from China dealing with Economic Affairs. The Topics include National Affairs and Policy, Foreign Trade and Investment, Economic Zones, Finance and Banking, and Agriculture.

  13. Modeling Population-Level Consequences of Polychlorinated Biphenyl Exposure in East Greenland Polar Bears.

    Science.gov (United States)

    Pavlova, Viola; Grimm, Volker; Dietz, Rune; Sonne, Christian; Vorkamp, Katrin; Rigét, Frank F; Letcher, Robert J; Gustavson, Kim; Desforges, Jean-Pierre; Nabe-Nielsen, Jacob

    2016-01-01

    Polychlorinated biphenyls (PCBs) can cause endocrine disruption, cancer, immunosuppression, or reproductive failure in animals. We used an individual-based model to explore whether and how PCB-associated reproductive failure could affect the dynamics of a hypothetical polar bear (Ursus maritimus) population exposed to PCBs to the same degree as the East Greenland subpopulation. Dose-response data from experimental studies on a surrogate species, the mink (Mustela vision), were used in the absence of similar data for polar bears. Two alternative types of reproductive failure in relation to maternal sum-PCB concentrations were considered: increased abortion rate and increased cub mortality. We found that the quantitative impact of PCB-induced reproductive failure on population growth rate depended largely on the actual type of reproductive failure involved. Critical potencies of the dose-response relationship for decreasing the population growth rate were established for both modeled types of reproductive failure. Comparing the model predictions of the age-dependent trend of sum-PCBs concentrations in females with actual field measurements from East Greenland indicated that it was unlikely that PCB exposure caused a high incidence of abortions in the subpopulation. However, on the basis of this analysis, it could not be excluded that PCB exposure contributes to higher cub mortality. Our results highlight the necessity for further research on the possible influence of PCBs on polar bear reproduction regarding their physiological pathway. This includes determining the exact cause of reproductive failure, i.e., in utero exposure versus lactational exposure of offspring; the timing of offspring death; and establishing the most relevant reference metrics for the dose-response relationship.

  14. Rebuttal of "Polar bear population forecasts: a public-policy forecasting audit"

    Science.gov (United States)

    Amstrup, Steven C.; Caswell, Hal; DeWeaver, Eric; Stirling, Ian; Douglas, David C.; Marcot, Bruce G.; Hunter, Christine M.

    2009-01-01

    Observed declines in the Arctic sea ice have resulted in a variety of negative effects on polar bears (Ursus maritimus). Projections for additional future declines in sea ice resulted in a proposal to list polar bears as a threatened species under the United States Endangered Species Act. To provide information for the Department of the Interior's listing-decision process, the US Geological Survey (USGS) produced a series of nine research reports evaluating the present and future status of polar bears throughout their range. In response, Armstrong et al. [Armstrong, J. S., K. C. Green, W. Soon. 2008. Polar bear population forecasts: A public-policy forecasting audit. Interfaces 38(5) 382–405], which we will refer to as AGS, performed an audit of two of these nine reports. AGS claimed that the general circulation models upon which the USGS reports relied were not valid forecasting tools, that USGS researchers were not objective or lacked independence from policy decisions, that they did not utilize all available information in constructing their forecasts, and that they violated numerous principles of forecasting espoused by AGS. AGS (p. 382) concluded that the two USGS reports were "unscientific and inconsequential to decision makers." We evaluate the AGS audit and show how AGS are mistaken or misleading on every claim. We provide evidence that general circulation models are useful in forecasting future climate conditions and that corporate and government leaders are relying on these models to do so. We clarify the strict independence of the USGS from the listing decision. We show that the allegations of failure to follow the principles of forecasting espoused by AGS are either incorrect or are based on misconceptions about the Arctic environment, polar bear biology, or statistical and mathematical methods. We conclude by showing that the AGS principles of forecasting are too ambiguous and subjective to be used as a reliable basis for auditing scientific

  15. Possible Effects of Climate Warming on Selected Populations of Polar Bears (Ursus maritimus) in the Canadian Arctic

    Science.gov (United States)

    Parkinson, Claire L.; Stirling Ian

    2006-01-01

    Polar bears are dependent on sea ice for survival. Climate warming in the Arctic has caused significant declines in coverage and thickness of sea ice in the polar basin and progressively earlier breakup in some areas. In four populations of polar bears in the eastern Canadian Arctic (including Western Hudson Bay), Inuit hunters report more bears near settlements during the open water period in recent years. These observations have been interpreted as evidence of increasing population size, resulting in increases in hunting quotas. However, long-term data on the population size and condition of polar bears in Western Hudson Bay, and population and harvest data from Baffin Bay, make it clear that those two populations at least are declining, not increasing. While the details vary in different arctic regions, analysis of passive-microwave satellite imagery, beginning in the late 1970s, indicates that the sea ice is breaking up at progressively earlier dates, so that bears must fast for longer periods during the open water season. Thus, at least part of the explanation for the appearance of more bears in coastal communities is likely that they are searching for alternative food sources because their stored body fat depots are being exhausted. We hypothesize that, if the climate continues to warm as projected by the IPCC, then polar bears in all five populations discussed in this paper will be stressed and are likely to decline in numbers, probably significantly so. As these populations decline, there will likely also be continuing, possibly increasing, numbers of problem interactions between bears and humans as the bears seek alternate food sources. Taken together, the data reported in this paper suggest that a precautionary approach be taken to the harvesting of polar bears and that the potential effects of climate warming be incorporated into planning for the management and conservation of this species throughout the Arctic.

  16. [Predominant polarity in type-I bipolar patients: Study in an isolated population with a high prevalence of mood disorders].

    Science.gov (United States)

    Obando, Antonio Carlos Toro; García, Ángela María Agudelo; Rodríguez, María Aurora Gallo; Palacio, Tomás Felipe Restrepo; Ontoso, Miguel Soto; Tamayo, Alejandra; Jaramillo, Carlos Alberto López

    2012-12-01

    Recent studies have shown that the predominant description of polarity has effects upon early detection and the timely beginning of treatment in patients with bipolar affective disorder (BAD). Cross sectional cut and descriptive study in 101 BAD patients coming from a genetically isolated population from the Colombian Region of Antioquia. The study covered a population of 101 patients with type-I BAD diagnosis, out of which 57,4% met the criteria for maniac polarity (MP), 10,1% exhibited depressive polarity (DP) and 25,7% were classified with Indefinite Polarity (IP). In comparison, MP patients have a lower education level and less starting age, including a greater number of single people. The MP group showed the greatest prevalence of suicide and greater use of cannabinoids and cocaine. Within the DP group there was a strong tendency to cigarette and alcohol consumption. With respect to pharmaceutical drugs consumed by the study patients during their lives, antipsychotics were the most widely used group, followed by lithium and anti-convulsivants. There is high percentage of MP patients who have used antidepressants during their lives. The polarity of the first episode of the disease seems to be a valid predictive parameter concerning the polarity of subsequent episodes; therefore, it works indirectly as a valid predictor of the disease's course. Copyright © 2012 Asociación Colombiana de Psiquiatría. Publicado por Elsevier España. All rights reserved.

  17. The influence of climate variability on polar bear (Ursus maritimus) and ringed seal (Pusa hispida) population dynamics

    DEFF Research Database (Denmark)

    Rosing-Asvid, A.

    2006-01-01

    Unusually high polar bear (Ursus maritimus Phipps, 1774) predation on ringed seal (Pusa hispida (Schreber, 1775)) pups and increased survival of polar bear cubs during mild springs is documented in published articles. Strong predation on newborn ringed seal pups in early spring, however, is likely...... to lower the overall energy intake of polar bears if ringed seal pups are their main food, because the energetic value of ringed seal pups increases 7-8 times during the 6 week lactation period. So although hunting success in early spring increases cub survival during the period after den emergence......,when they are most vulnerable, it is likely to increase the number of starving bears later in the season. This negative-feedback effect of strong spring predation will not occur in areas where other seal species are abundant during summer, and polar bears in such areas are likely to exhibit population growth during...

  18. Effects of earlier sea ice breakup on survival and population size of polar bears in western Hudson Bay

    Science.gov (United States)

    Regehr, E.V.; Lunn, N.J.; Amstrup, Steven C.; Stirling, I.

    2007-01-01

    Some of the most pronounced ecological responses to climatic warming are expected to occur in polar marine regions, where temperature increases have been the greatest and sea ice provides a sensitive mechanism by which climatic conditions affect sympagic (i.e., with ice) species. Population-level effects of climatic change, however, remain difficult to quantify. We used a flexible extension of Cormack-Jolly-Seber capture-recapture models to estimate population size and survival for polar bears (Ursus maritimus), one of the most ice-dependent of Arctic marine mammals. We analyzed data for polar bears captured from 1984 to 2004 along the western coast of Hudson Bay and in the community of Churchill, Manitoba, Canada. The Western Hudson Bay polar bear population declined from 1,194 (95% CI = 1,020-1,368) in 1987 to 935 (95% CI = 794-1,076) in 2004. Total apparent survival of prime-adult polar bears (5-19 yr) was stable for females (0.93; 95% CI = 0.91-0.94) and males (0.90; 95% CI = 0.88-0.91). Survival of juvenile, subadult, and senescent-adult polar bears was correlated with spring sea ice breakup date, which was variable among years and occurred approximately 3 weeks earlier in 2004 than in 1984. We propose that this correlation provides evidence for a causal association between earlier sea ice breakup (due to climatic warming) and decreased polar bear survival. It may also explain why Churchill, like other communities along the western coast of Hudson Bay, has experienced an increase in human-polar bear interactions in recent years. Earlier sea ice breakup may have resulted in a larger number of nutritionally stressed polar bears, which are encroaching on human habitations in search of supplemental food. Because western Hudson Bay is near the southern limit of the species' range, our findings may foreshadow the demographic responses and management challenges that more northerly polar bear populations will experience if climatic warming in the Arctic continues as

  19. Polar Bear Optimization Algorithm: Meta-Heuristic with Fast Population Movement and Dynamic Birth and Death Mechanism

    Directory of Open Access Journals (Sweden)

    Dawid Połap

    2017-09-01

    Full Text Available In the proposed article, we present a nature-inspired optimization algorithm, which we called Polar Bear Optimization Algorithm (PBO. The inspiration to develop the algorithm comes from the way polar bears hunt to survive in harsh arctic conditions. These carnivorous mammals are active all year round. Frosty climate, unfavorable to other animals, has made polar bears adapt to the specific mode of exploration and hunting in large areas, not only over ice but also water. The proposed novel mathematical model of the way polar bears move in the search for food and hunt can be a valuable method of optimization for various theoretical and practical problems. Optimization is very similar to nature, similarly to search for optimal solutions for mathematical models animals search for optimal conditions to develop in their natural environments. In this method. we have used a model of polar bear behaviors as a search engine for optimal solutions. Proposed simulated adaptation to harsh winter conditions is an advantage for local and global search, while birth and death mechanism controls the population. Proposed PBO was evaluated and compared to other meta-heuristic algorithms using sample test functions and some classical engineering problems. Experimental research results were compared to other algorithms and analyzed using various parameters. The analysis allowed us to identify the leading advantages which are rapid recognition of the area by the relevant population and efficient birth and death mechanism to improve global and local search within the solution space.

  20. Population genetic studies of the polar bear (Ursus maritimus): A summary of available data and interpretation of results

    Science.gov (United States)

    Scribner, Kim T.; Garner, G.W.; Amstrup, Steven C.; Cronin, M.A.; Dizon, Andrew E.; Chivers, Susan J.; Perrin, William F.

    1997-01-01

    A summary of existing population genetics literature is presented for polar bears (Ursus maritimus) and interpreted in the context of the species' life-history characteristics and regional heterogeneity in environmental regimes and movement patterns. Several nongenetic data sets including morphology, contaminant levels, geographic variation in reproductive characteristics, and the location and distribution of open-water foraging habitat suggest some degree of spatial structuring. Eleven populations are recognized by the IUCN Polar Bear Specialist Group. Few genetics studies exist for polar bears. Interpretation and generalizations of regional variation in intra- and interpopulation levels of genetic variability are confounded by the paucity of data from many regions and by the fact that no single informative genetic marker has been employed in multiple regions. Early allozyme studies revealed comparatively low levels of genetic variability and no compelling evidence of spatial structuring. Studies employing mitochondrial DNA (mtDNA) also found low levels of genetic variation, a lack of phylogenetic structure, and no significant evidence for spatial variation in haplotype frequency. In contrast, microsatellite variable number of tandem repeat (VNTR) loci have revealed significant heterogeneity in allele frequency among populations in the Canadian Arctic. These regions are characterized by archipelgic patterns of sea-ice movements. Further studies using highly polymorphic loci are needed in regions characterized by greater polar bear dependency on pelagic sea-ice movements and in regions for which no data currently exist (i.e., Laptev and Novaya Zemlya/Franz Josef).

  1. Rebuttal of "Polar bear population forecasts: a public-policy forecasting audit"

    Science.gov (United States)

    Steven C. Amstrup; Hal Caswell; Eric DeWeaver; Ian Stirling; David C. Douglas; Bruce G. Marcot; Christine M. Hunter

    2009-01-01

    Observed declines in the Arctic sea ice have resulted in a variety of negative effects on polar bears (Ursus maritimus). Projections for additional future declines in sea ice resulted in a proposal to list polar bears as a threatened species under the United States Endangered Species Act. To provide information for the Department of the Interior...

  2. Internal Affairs Allegations

    Data.gov (United States)

    Montgomery County of Maryland — This dataset contains allegations brought to the attention of the Internal Affairs Division either through external complaints or internal complaint or recognition....

  3. Genetic variation, relatedness, and effective population size of polar bears (Ursus maritimus) in the southern Beaufort Sea, Alaska

    Science.gov (United States)

    Cronin, Matthew A.; Amstrup, Steven C.; Talbot, Sandra L.; Sage, George K.; Amstrup, Kristin S.

    2009-01-01

    Polar bears (Ursus maritimus) are unique among bears in that they are adapted to the Arctic sea ice environment. Genetic data are useful for understanding their evolution and can contribute to management. We assessed parentage and relatedness of polar bears in the southern Beaufort Sea, Alaska, with genetic data and field observations of age, sex, and mother–offspring and sibling relationships. Genotypes at 14 microsatellite DNA loci for 226 bears indicate that genetic variation is comparable to other populations of polar bears with mean number of alleles per locus of 7.9 and observed and expected heterozygosity of 0.71. The genetic data verified 60 field-identified mother–offspring pairs and identified 10 additional mother–cub pairs and 48 father–offspring pairs. The entire sample of related and unrelated bears had a mean pairwise relatedness index (rxy) of approximately zero, parent–offspring and siblings had rxy of approximately 0.5, and 5.2% of the samples had rxy values within the range expected for parent-offspring. Effective population size (Ne= 277) and the ratio of Ne to total population size (Ne/N = 0.182) were estimated from the numbers of reproducing males and females. Ne estimates with genetic methods gave variable results. Our results verify and expand field data on reproduction by females and provide new data on reproduction by males and estimates of relatedness and Ne in a polar bear population.

  4. Genetic variation, relatedness, and effective population size of polar bears (Ursus maritimus) in the southern Beaufort Sea, Alaska.

    Science.gov (United States)

    Cronin, Matthew A; Amstrup, Steven C; Talbot, Sandra L; Sage, George K; Amstrup, Kristin S

    2009-01-01

    Polar bears (Ursus maritimus) are unique among bears in that they are adapted to the Arctic sea ice environment. Genetic data are useful for understanding their evolution and can contribute to management. We assessed parentage and relatedness of polar bears in the southern Beaufort Sea, Alaska, with genetic data and field observations of age, sex, and mother-offspring and sibling relationships. Genotypes at 14 microsatellite DNA loci for 226 bears indicate that genetic variation is comparable to other populations of polar bears with mean number of alleles per locus of 7.9 and observed and expected heterozygosity of 0.71. The genetic data verified 60 field-identified mother-offspring pairs and identified 10 additional mother-cub pairs and 48 father-offspring pairs. The entire sample of related and unrelated bears had a mean pairwise relatedness index (r(xy)) of approximately zero, parent-offspring and siblings had r(xy) of approximately 0.5, and 5.2% of the samples had r(xy) values within the range expected for parent-offspring. Effective population size (N(e) = 277) and the ratio of N(e) to total population size (N(e)/N = 0.182) were estimated from the numbers of reproducing males and females. N(e) estimates with genetic methods gave variable results. Our results verify and expand field data on reproduction by females and provide new data on reproduction by males and estimates of relatedness and N(e) in a polar bear population.

  5. China Report, Economic Affairs

    National Research Council Canada - National Science Library

    1987-01-01

    .... This report from China contains the topics: NATIONAL POLICY AND ISSUES, PROVINCIAL AFFAIRS, ECONOMIC DEVELOPMENT ZONES, ECONOMIC PLANNING, ECONOMIC MANAGEMENT, FINANCE AND BANKING, INDUSTRY, SMALL- SCALE ENTERPRISES, CONSTRUCTION, DOMESTIC...

  6. Department of Veterans Affairs

    Science.gov (United States)

    ... Whistleblower Rights & Protections Transparency Media Room Inside the Media Room Public Affairs News Releases Speeches Videos Publications National Observances Veterans Day Memorial Day Celebrating America's Freedoms Special Events Adaptive Sports Program Creative Arts Festival ...

  7. Public affairs plan

    International Nuclear Information System (INIS)

    1995-09-01

    The purpose of the Uranium Mill Tailings Remedial Action (UMTRA) Project Public Affairs Plan is to establish goals for the fiscal year (FY) 1996 UMTRA Project public affairs program and to identify specific activities to be conducted during the year. It describes the roles of various agencies involved in the public affairs program and defines the functions of the UMTRA Project Technical Assistance Contractor (TAC) Public Affairs Department. It replaces the FY 1995 Public Affairs Plan (DOE/AL/62350-154). The plan also describes the US Department of Energy's (DOE) plans to keep stakeholders and other members of the public informed about UMTRA Project policies, plans, and activities, and provide opportunities for stakeholders and interested segments of the public to participate in UMTRA Project decision-making processes. The plan applies to the UMTRA Project Team; the DOE Grand Junction Projects Office (GJPO); the DOE Albuquerque Operations Office, Office of Public Affairs (OPA); the TAC; the UMTRA Project Remedial Action Contractor (RAC); and other cooperating agencies

  8. South Polar Skua breeding populations in the Ross Sea assessed from demonstrated relationship with Adélie Penguin numbers

    Science.gov (United States)

    Wilson, Deborah J.; Lyver, Phil O'B.; Greene, Terry C.; Whitehead, Amy L.; Dugger, Catherine; Karl, Brian J.; Barringer, James R. F.; McGarry, Roger; Pollard, Annie M.; Ainley, David G.

    2017-01-01

    In the Ross Sea region, most South Polar Skuas (Stercorarius maccormicki) nest near Adélie Penguin (Pygoscelis adeliae) colonies, preying and scavenging on fish, penguins, and other carrion. To derive a relationship to predict skua numbers from better-quantified penguin numbers, we used distance sampling to estimate breeding skua numbers within 1000 m of 5 penguin nesting locations (Cape Crozier, Cape Royds, and 3 Cape Bird locations) on Ross Island in 3 consecutive years. Estimated numbers of skua breeding pairs were highest at Cape Crozier (270,000 penguin pairs; 1099 and 1347 skua pairs in 2 respective years) and lowest at Cape Royds (3000 penguin pairs; 45 skua pairs). The log–log linear relationship (R2 = 0.98) between pairs of skuas and penguins was highly significant, and most historical estimates of skua and penguin numbers in the Ross Sea were within 95 % prediction intervals of the regression. Applying our regression model to current Adélie Penguin colony sizes at 23 western Ross Sea locations predicted that 4635 pairs of skuas now breed within 1000 m of penguin colonies in the Ross Island metapopulation (including Beaufort Island) and northern Victoria Land. We estimate, using published skua estimates for elsewhere in Antarctica, that the Ross Sea South Polar Skua population comprises ~50 % of the world total, although this may be an overestimate because of incomplete data elsewhere. To improve predictions and enable measurement of future skua population change, we recommend additional South Polar Skua surveys using consistent distance-sampling methods at penguin colonies of a range of sizes.

  9. Public affairs plan

    Energy Technology Data Exchange (ETDEWEB)

    1994-09-01

    The purpose of the Uranium Mill Tailings Remedial Action (UMTRA) Project Public Affairs Plan is to establish goals for the Fiscal Year 1995 UMTRA public affairs program and identify specific activities to be conducted during the year. It also describes the roles of various agencies involved in the conduct of the public affairs program and defines the functions of the Technical Assistance Contractor (TAC) Public Affairs Department. It integrates and replaces the Public Participation Plan (DOE/AL/62350-47D) and Public Information Plan (DOE/AL/623590-71). The plan describes the US Department of Energy`s (DOE) plans to keep stakeholders and other members of the public informed about project policies, plans, and activities, and provide opportunities for stakeholders and interested segments of the public to participate in project decision-making processes. The plan applies to the UMTRA Project Office; the DOE Albuquerque Operations Office, Office of Intergovernmental and External Affairs (OIEA); the UMTRA TAC; the UMTRA Remedial Action Contractor (RAC); and other cooperating agencies.

  10. Public affairs plan

    International Nuclear Information System (INIS)

    1994-09-01

    The purpose of the Uranium Mill Tailings Remedial Action (UMTRA) Project Public Affairs Plan is to establish goals for the Fiscal Year 1995 UMTRA public affairs program and identify specific activities to be conducted during the year. It also describes the roles of various agencies involved in the conduct of the public affairs program and defines the functions of the Technical Assistance Contractor (TAC) Public Affairs Department. It integrates and replaces the Public Participation Plan (DOE/AL/62350-47D) and Public Information Plan (DOE/AL/623590-71). The plan describes the US Department of Energy's (DOE) plans to keep stakeholders and other members of the public informed about project policies, plans, and activities, and provide opportunities for stakeholders and interested segments of the public to participate in project decision-making processes. The plan applies to the UMTRA Project Office; the DOE Albuquerque Operations Office, Office of Intergovernmental and External Affairs (OIEA); the UMTRA TAC; the UMTRA Remedial Action Contractor (RAC); and other cooperating agencies

  11. Effects of capturing and collaring on polar bears: findings from long-term research on the southern Beaufort Sea population

    Science.gov (United States)

    Rode, Karyn D.; Pagano, Anthony M.; Bromaghin, Jeffrey F.; Atwood, Todd C.; Durner, George M.; Simac, Kristin S.; Amstrup, Steven C.

    2014-01-01

    Context: The potential for research methods to affect wildlife is an increasing concern among both scientists and the public. This topic has a particular urgency for polar bears because additional research is needed to monitor and understand population responses to rapid loss of sea ice habitat.Aims: This study used data collected from polar bears sampled in the Alaska portion of the southern Beaufort Sea to investigate the potential for capture to adversely affect behaviour and vital rates. We evaluated the extent to which capture, collaring and handling may influence activity and movement days to weeks post-capture, and body mass, body condition, reproduction and survival over 6 months or more.Methods: We compared post-capture activity and movement rates, and relationships between prior capture history and body mass, body condition and reproductive success. We also summarised data on capture-related mortality.Key results: Individual-based estimates of activity and movement rates reached near-normal levels within 2–3 days and fully normal levels within 5 days post-capture. Models of activity and movement rates among all bears had poor fit, but suggested potential for prolonged, lower-level rate reductions. Repeated captures was not related to negative effects on body condition, reproduction or cub growth or survival. Capture-related mortality was substantially reduced after 1986, when immobilisation drugs were changed, with only 3 mortalities in 2517 captures from 1987–2013.Conclusions: Polar bears in the southern Beaufort Sea exhibited the greatest reductions in activity and movement rates 3.5 days post-capture. These shorter-term, post-capture effects do not appear to have translated into any long-term effects on body condition, reproduction, or cub survival. Additionally, collaring had no effect on polar bear recovery rates, body condition, reproduction or cub survival.Implications: This study provides empirical evidence that current capture

  12. Examination of Veterans Affairs disability compensation as a disincentive for employment in a population-based sample of Veterans under age 65.

    Science.gov (United States)

    Tsai, Jack; Rosenheck, Robert A

    2013-12-01

    Concerns that disability benefits may create disincentives for employment may be especially relevant for young American military veterans, particularly veterans of the recent wars in Iraq and Afghanistan who are facing a current economic recession and turning in large numbers to the Department of Veterans Affairs (VA) for disability compensation. This study describes the rate of employment and VA disability compensation among a nationally representative sample of veterans under the age of 65 and examines the association between levels of VA disability compensation and employment, adjusting for sociodemographics and health status. Data on a total of 4,787 veterans from the 2010 National Survey of Veterans were analyzed using multinomial logistic regressions to compare employed veterans with two groups that were not employed. Two-thirds of veterans under the age of 65 were employed, although only 36 % of veterans with a VA service-connected disability rating of 50 % or higher were employed. Veterans who received no VA disability compensation or who were service-connected 50 % or more were more likely to be unemployed and not looking for employment than veterans who were not service-connected or were service-connected less than 50 %, suggesting high but not all levels of VA disability compensation create disincentives for employment. Results were similar when analyses were limited to veterans who served in Iraq and Afghanistan. Education and vocational rehabilitation interventions, as well as economic work incentives, may be needed to maximize employment among veterans with disabilities.

  13. Patterns of care and survival after a cancer of unknown primary (CUP) diagnosis: A population-based nested cohort study in Australian Government Department of Veterans' Affairs clients.

    Science.gov (United States)

    Schaffer, Andrea L; Pearson, Sallie-Anne; Dobbins, Timothy A; Er, Chuang C; Ward, Robyn L; Vajdic, Claire M

    2015-08-01

    Little is known about patterns of care after a cancer of unknown primary (CUP) diagnosis. We performed a retrospective cohort study to describe and compare the treatment, health service use and survival of patients with CUP and metastatic cancer of known primary among 143,956 Australian Government Department of Veterans' Affairs clients, 2004-2007. We randomly matched clients with CUP (C809; n=252) with clients with a first diagnosis of metastatic solid cancer of known primary (n=980). We ascertained health services from the month of diagnosis up to 2 months post-diagnosis for consultations, hospitalizations and emergency department visits, and up to 1 year for treatment. We compared cancer treatments using conditional logistic regression; consultation rates using negative binomial regression; and survival using stratified Cox regression. 30% of CUP patients and 70% of patients with known primary received cancer treatment and the median survival was 37 days and 310 days respectively. CUP patients received fewer cancer medicines (odds ratio (OR)=0.54, 95% confidence interval (CI) 0.33-0.89) and less cancer-related surgery (OR=0.25, 95% CI 0.15-0.41); males with CUP received more radiation therapy (OR=2.88, 95% CI 1.69-4.91). CUP patients had more primary care consultations (incidence rate ratio (IRR)=1.25, 95% CI 1.11-1.41), emergency department visits (IRR=1.86, 95% CI 1.50-2.31) and hospitalizations (IRR=1.18, 95% CI 1.03-1.35), and a higher risk of death within 30 days (hazard ratio=3.30, 95% CI 1.69-6.44). Patients with CUP receive less treatment but use more health services, which may reflect underlying patient and disease characteristics. Copyright © 2015 Commonwealth of Australia. Published by Elsevier Ltd.. All rights reserved.

  14. Celebrities in International Affairs

    DEFF Research Database (Denmark)

    Richey, Lisa Ann; Budabin, Alexandra Cosima

    2016-01-01

    Celebrity engagement in global “helping” is not a simple matter of highly photogenic caring for needy others across borders; it is a complex relationship of power that often produces contradictory functions in relation to the goals of humanitarianism, development, and advocacy. This article argues...... that celebrities are acting as other elite actors in international affairs: investing considerable capital into processes that are highly political. It traces the emergence and practices of the elite politics of celebrities in North-South relations, an evolution made possible by recent changes in aid practices......, media, and NGOs, then considers exemplary cases of Angelina Jolie in Burma, Ben Affleck in the Democractic Republic of Congo, and Madonna in Malawi. These celebrity practices as diplomats, experts, and humanitarians in international affairs illustrate the diverse and contradictory forms of engagement...

  15. China Report, Economic Affairs

    Science.gov (United States)

    1986-02-11

    percent of members of leading groups of large and medium-sized back- bone enterprises have received education at and above college level. The average...enterprises, so that enterprises genuinely become lively "economic cells ," not simply subsidiaries of administrative organs. 4. In the sphere of...electric power stations, and breweries , resulting in great losses and waste. Such a state of affairs will certainly achieve no further development. 31

  16. The Essonne affairs

    International Nuclear Information System (INIS)

    Lallement, R.

    1996-01-01

    In 1990 the French Commissariat a l'energie atomique (CEA) had to deal with a series of issues concerning depositories of radioactive substances of very low activity, culminating, in October 1990, with the discovery of small amounts of plutonium in a depository. These were important issues for the following reasons: they highlighted the question o low activity wastes and their treatment, that is not yet resolved; they drew attention to the sensitivity of the concerned organisations, elected representatives and the public to the problems of radioactivity however low its level; they made the CEA aware of the gap that existed between the nuclear industry's practices, language and perception of risks and the perception of the French public. This paper outlines the different 'affairs', shows their common bases, and analyses the consequences for the CEA and the nuclear industry in general. These 'affairs' illustrate the absolute obligation for all producers of wastes to know, and to make known in the smallest detail, the way in which the wastes are treated and the places where they are stored and kept. Waste management has not always been as a noble task. These 'affairs' have shown that the reputation of the CEA was measured as much by the quality of its waste management as by the success of its research programme, with a budget that has doubled in the last few years. (author)

  17. East Greenland and Barents Sea polar bears (Ursus maritimus): adaptive variation between two populations using skull morphometrics as an indicator of environmental and genetic differences.

    Science.gov (United States)

    Pertoldi, Cino; Sonne, Christian; Wiig, Øystein; Baagøe, Hans J; Loeschcke, Volker; Bechshøft, Thea Østergaard

    2012-06-01

    A morphometric study was conducted on four skull traits of 37 male and 18 female adult East Greenland polar bears (Ursus maritimus) collected 1892-1968, and on 54 male and 44 female adult Barents Sea polar bears collected 1950-1969. The aim was to compare differences in size and shape of the bear skulls using a multivariate approach, characterizing the variation between the two populations using morphometric traits as an indicator of environmental and genetic differences. Mixture analysis testing for geographic differentiation within each population revealed three clusters for Barents Sea males and three clusters for Barents Sea females. East Greenland consisted of one female and one male cluster. A principal component analysis (PCA) conducted on the clusters defined by the mixture analysis, showed that East Greenland and Barents Sea polar bear populations overlapped to a large degree, especially with regards to females. Multivariate analyses of variance (MANOVA) showed no significant differences in morphometric means between the two populations, but differences were detected between clusters from each respective geographic locality. To estimate the importance of genetics and environment in the morphometric differences between the bears, a PCA was performed on the covariance matrix derived from the skull measurements. Skull trait size (PC1) explained approx. 80% of the morphometric variation, whereas shape (PC2) defined approx. 15%, indicating some genetic differentiation. Hence, both environmental and genetic factors seem to have contributed to the observed skull differences between the two populations. Overall, results indicate that many Barents Sea polar bears are morphometrically similar to the East Greenland ones, suggesting an exchange of individuals between the two populations. Furthermore, a subpopulation structure in the Barents Sea population was also indicated from the present analyses, which should be considered with regards to future management

  18. Risk Factors for Serious Prescription Opioid-Induced Respiratory Depression or Overdose: Comparison of Commercially Insured and Veterans Health Affairs Populations.

    Science.gov (United States)

    Nadpara, Pramit A; Joyce, Andrew R; Murrelle, E Lenn; Carroll, Nathan W; Carroll, Norman V; Barnard, Marie; Zedler, Barbara K

    2018-01-01

    To characterize the risk factors associated with overdose or serious opioid-induced respiratory depression (OIRD) among medical users of prescription opioids in a commercially insured population (CIP) and to compare risk factor profiles between the CIP and Veterans Health Administration (VHA) population. Analysis of data from 18,365,497 patients in the IMS PharMetrics Plus health plan claims database (CIP) who were dispensed a prescription opioid in 2009 to 2013. Baseline factors associated with an event of serious OIRD among 7,234 cases and 28,932 controls were identified using multivariable logistic regression. The CIP risk factor profile was compared with that from a corresponding logistic regression among 817 VHA cases and 8,170 controls in 2010 to 2012. The strongest associations with serious OIRD in CIP were diagnosed substance use disorder (odds ratio [OR] = 10.20, 95% confidence interval [CI] = 9.06-11.40) and depression (OR = 3.12, 95% CI = 2.84-3.42). Other strongly associated factors included other mental health disorders; impaired liver, renal, vascular, and pulmonary function; prescribed fentanyl, methadone, and morphine; higher daily opioid doses; and concurrent psychoactive medications. These risk factors, except depression, vascular disease, and specific opioids, largely aligned with VHA despite CIP being substantially younger, including more females and less chronic disease, and having greater prescribing prevalence of higher daily opioid doses, specific opioids, and most selected nonopioids. Risk factor profiles for serious OIRD among US medical users of prescription opioids with private or public health insurance were largely concordant despite substantial differences between the populations in demographics, clinical conditions, health care delivery systems, and clinical practices. © 2017 American Academy of Pain Medicine.

  19. Revolution in Detection Affairs

    Energy Technology Data Exchange (ETDEWEB)

    Stern W.

    2013-11-02

    The detection of nuclear or radioactive materials for homeland or national security purposes is inherently difficult. This is one reason detection efforts must be seen as just one part of an overall nuclear defense strategy which includes, inter alia, material security, detection, interdiction, consequence management and recovery. Nevertheless, one could argue that there has been a revolution in detection affairs in the past several decades as the innovative application of new technology has changed the character and conduct of detection operations. This revolution will likely be most effectively reinforced in the coming decades with the networking of detectors and innovative application of anomaly detection algorithms.

  20. Student Affairs Capitalism and Early-Career Student Affairs Professionals

    Science.gov (United States)

    Lee, Jenny J.; Helm, Matthew

    2013-01-01

    This study explores student affairs capitalism as the alteration of professional practice towards the financial interests of institutions. Student affairs capitalism has the potential to create dynamics in which the interests of students become secondary to the institution's economic needs. This study examined this phenomenon from the perspectives…

  1. Health service utilisation and investigations before diagnosis of cancer of unknown primary (CUP): A population-based nested case-control study in Australian Government Department of Veterans' Affairs clients.

    Science.gov (United States)

    Vajdic, Claire M; Schaffer, Andrea L; Dobbins, Timothy A; Ward, Robyn L; Er, Chuang C; Pearson, Sallie-Anne

    2015-08-01

    Population-based data on the use of health services and diagnostic investigations for patients with cancer of unknown primary (CUP) is scarce. It is uncertain whether the pathways to diagnosis are different for CUP compared to other cancers. We performed a population-based nested matched case-control study using linked routinely collected records for Australian Government Department of Veterans' Affairs clients, 2004-2007. We compared health care consultations, hospitalisations, emergency department visits, and diagnostic procedures in the three months prior and the month of diagnosis for 281 clients registered with a diagnosis of CUP (C809) and 1102 controls randomly selected from clients registered with a first diagnosis of metastatic cancer of known primary. Overall, the median age at cancer diagnosis was 83 years. CUP patients were slightly older and had significantly more comorbidities prior to diagnosis than those with known primary. Compared to known primary, a diagnosis of CUP was significantly more likely after an emergency department visit, less specialist input, fewer invasive diagnostic procedures such as resection or endoscopy, and more non-invasive procedures such as magnetic resonance imaging. There were no differences in primary care or allied health consultations and hospitalisations. This health care pathway suggests delayed recognition of cancer and scope for improvement in the medical management of high-risk individuals presenting to primary care. The pattern of diagnostic investigations reveals under-investigation in some CUP patients but this is likely to reflect recognition of limited treatment options and poor prognosis and is consistent with clinical guidelines. Copyright © 2015 Commonwealth of Australia. Published by Elsevier Ltd.. All rights reserved.

  2. African Journal of International Affairs

    African Journals Online (AJOL)

    The African Journal of International Affairs (AJIA) is a bi-annual publication of CODESRIA, Dakar, Senegal. It offers a platform for analyses on contemporary issues in African International Affairs in relation to global developments as they affect Africa. AJIA welcomes contributions in English and in French from both African ...

  3. The Plumbat affair

    International Nuclear Information System (INIS)

    Davenport, E.; Eddy, P.; Gillman, P.

    1978-01-01

    On 16 November 1968, 560 metal drums labelled 'Plumbat' were loaded on to a small ship, the Scheersberg A, in Antwerp. The drums contained uranium ore which was being shipped by a small German chemical company to an obscure Italian paint company for processing. At least, that was what the documents said, and the grounds upon which Euratom (the European Atomic Energy Commission) had licensed the sale and shipment of the ore. The Scheersberg A next appeared in a Turkish port, without her cargo. Potentially, the uranium in the drums could be formed into the raw material for a dozen nuclear bombs. As far as Euratom and the security forces of Germany and Itay were concerned, it had disappeared off the face of the earth. In fact, nothing more might ever have been heard about it were it not for a chance sentence uttered to the Norwegian police who were interrogating a suspect about the murder of an Arab waiter. Under questioning, the suspect revealed that he was one of Israel's secret 'hit teams', sent out to kill suspected Arab terrorists. He talked almost eagerly to the police, and divulged that he had once owned a ship called the Scheersberg A. Israel was a logical destination for the uranium, since it was one of the few countries which possessed a reactor capable of transmuting the uranium ore into plutonium, which could be used for bombs. Security officials and journalists followed up that chance remark and started to unravel the extraordinary history of the Scheersberg A, and its part in another mysterious affair, the hijacking by Israel of five gunboats from the port of Cherbourg late in 1969. The Plumbat Affair is a fascinating detective story; the alliances that were formed and the deals that were made at the highest levels of international politics and in the depths of the underworld make this a thriller beyond the imaginings of most novelists. (author)

  4. Veterans Affairs Suicide Prevention Synthetic Dataset

    Data.gov (United States)

    Department of Veterans Affairs — The VA's Veteran Health Administration, in support of the Open Data Initiative, is providing the Veterans Affairs Suicide Prevention Synthetic Dataset (VASPSD). The...

  5. Variation in the response of an Arctic top predator experiencing habitat loss: feeding and reproductive ecology of two polar bear populations.

    Science.gov (United States)

    Rode, Karyn D; Regehr, Eric V; Douglas, David C; Durner, George; Derocher, Andrew E; Thiemann, Gregory W; Budge, Suzanne M

    2014-01-01

    Polar bears (Ursus maritimus) have experienced substantial changes in the seasonal availability of sea ice habitat in parts of their range, including the Beaufort, Chukchi, and Bering Seas. In this study, we compared the body size, condition, and recruitment of polar bears captured in the Chukchi and Bering Seas (CS) between two periods (1986-1994 and 2008-2011) when declines in sea ice habitat occurred. In addition, we compared metrics for the CS population 2008-2011 with those of the adjacent southern Beaufort Sea (SB) population where loss in sea ice habitat has been associated with declines in body condition, size, recruitment, and survival. We evaluated how variation in body condition and recruitment were related to feeding ecology. Comparing habitat conditions between populations, there were twice as many reduced ice days over continental shelf waters per year during 2008-2011 in the SB than in the CS. CS polar bears were larger and in better condition, and appeared to have higher reproduction than SB bears. Although SB and CS bears had similar diets, twice as many bears were fasting in spring in the SB than in the CS. Between 1986-1994 and 2008-2011, body size, condition, and recruitment indices in the CS were not reduced despite a 44-day increase in the number of reduced ice days. Bears in the CS exhibited large body size, good body condition, and high indices of recruitment compared to most other populations measured to date. Higher biological productivity and prey availability in the CS relative to the SB, and a shorter recent history of reduced sea ice habitat, may explain the maintenance of condition and recruitment of CS bears. Geographic differences in the response of polar bears to climate change are relevant to range-wide forecasts for this and other ice-dependent species. © 2013 John Wiley & Sons Ltd.

  6. Variation in the response of an Arctic top predator experiencing habitat loss: Feeding and reproductive ecology of two polar bear populations

    Science.gov (United States)

    Rode, Karyn D.; Regehr, Eric V.; Douglas, David C.; Durner, George M.; Derocher, Andrew E.; Thiemann, Gregory W.; Budge, Suzanne M.

    2014-01-01

    Polar bears (Ursus maritimus) have experienced substantial changes in the seasonal availability of sea ice habitat in parts of their range, including the Beaufort, Chukchi, and Bering Seas. In this study, we compared the body size, condition, and recruitment of polar bears captured in the Chukchi and Bering Seas (CS) between two periods (1986–1994 and 2008–2011) when declines in sea ice habitat occurred. In addition, we compared metrics for the CS population 2008–2011 with those of the adjacent southern Beaufort Sea (SB) population where loss in sea ice habitat has been associated with declines in body condition, size, recruitment, and survival. We evaluated how variation in body condition and recruitment were related to feeding ecology. Comparing habitat conditions between populations, there were twice as many reduced ice days over continental shelf waters per year during 2008–2011 in the SB than in the CS. CS polar bears were larger and in better condition, and appeared to have higher reproduction than SB bears. Although SB and CS bears had similar diets, twice as many bears were fasting in spring in the SB than in the CS. Between 1986–1994 and 2008–2011, body size, condition, and recruitment indices in the CS were not reduced despite a 44-day increase in the number of reduced ice days. Bears in the CS exhibited large body size, good body condition, and high indices of recruitment compared to most other populations measured to date. Higher biological productivity and prey availability in the CS relative to the SB, and a shorter recent history of reduced sea ice habitat, may explain the maintenance of condition and recruitment of CS bears. Geographic differences in the response of polar bears to climate change are relevant to range-wide forecasts for this and other ice-dependent species.

  7. Polarized neutrons

    International Nuclear Information System (INIS)

    Williams, W.G.

    1988-01-01

    The book on 'polarized neutrons' is intended to inform researchers in condensed matter physics and chemistry of the diversity of scientific problems that can be investigated using polarized neutron beams. The contents include chapters on:- neutron polarizers and instrumentation, polarized neutron scattering, neutron polarization analysis experiments and precessing neutron polarization. (U.K.)

  8. Student Affairs in Complex Contexts

    Directory of Open Access Journals (Sweden)

    Birgit Schreiber

    2017-02-01

    Full Text Available While the Western world – with Brexit, Trump, Festung Europa, and so forth – seems to be increasingly retreating into narrow nationalism, the Journal of Student Affairs in Africa is connecting African academics, executives and administrators and is becoming an evermore accessed international, African platform for publishing research on higher education and Student Affairs in Africa. In this issue, we do not only publish several commentaries on the recent Global Summit of Student Affairs and Services held in October 2016 at Stellenbosch University, South Africa. We also publish contributions from Ethiopia alongside articles from Australia, the USA, and universities in South Africa (University of the Free State, University of Johannesburg.

  9. 78 FR 13897 - Bureau of International Labor Affairs; Office of Trade and Labor Affairs; Labor Affairs Council...

    Science.gov (United States)

    2013-03-01

    ... Public Session Meeting AGENCY: International Labor Affairs Bureau (ILAB), U.S. Department of Labor.... Department of Labor gives notice of the public session of the meeting of the Labor Affairs Council (``Council... DEPARTMENT OF LABOR Office of the Secretary Bureau of International Labor Affairs; Office of Trade...

  10. JPRS Report, Political Affairs.

    Science.gov (United States)

    1990-08-27

    VS . Malkovskiy; MOLODEZH ESTONII, 20 Jun 90] 13 Further on Estonian Party Congress [T. Opekina; SOVETSKAYA ESTONIYA, 22 Jun 90] 16 Estonian...peasant farms, conditions for the greatest advantage for entrepreneurship , or to create joint ventures with foreign firms. But our legislators who...majority. The republic’s Supreme Soviet continues to ignore the demand by a considerable segment of the franchised Latvian population that there should

  11. USSR Report, International Affairs

    Science.gov (United States)

    1986-03-04

    pump enormous resources out of the economies of the young countries, thereby reducing their purchasing power in the foreign marketplace . This, in...ethnoregional principle. The only thing different about them was their names. The largest nationalities—Hausa, Yoruba and Ibo—were represented by the National...Eastern regions where the majority of the population was made up of the largest nationalities (in the indicated order)—Hausa, Yoruba and Ibo

  12. Using Intersectionality in Student Affairs Research

    Science.gov (United States)

    Strayhorn, Terrell L.

    2017-01-01

    This chapter presents intersectionality as a useful heuristic for conducting research in higher education and student affairs contexts. Much more than just another theory, intersectionality can powerfully shape student affairs research in both obvious and tacit ways.

  13. Veterans Affairs Central Cancer Registry (VACCR)

    Data.gov (United States)

    Department of Veterans Affairs — The Veterans Affairs Central Cancer Registry (VACCR) receives and stores information on cancer diagnosis and treatment constraints compiled and sent in by the local...

  14. Student Affairs Assessment, Strategic Planning, and Accreditation

    Science.gov (United States)

    Fallucca, Amber

    2017-01-01

    This chapter illustrates how student affairs units participate in accreditation across regional agency expectations and program-level requirements. Strategies for student affairs units to engage in campus strategic planning processes to further highlight their contributions are also recommended.

  15. Student Affairs in Complex Contexts

    African Journals Online (AJOL)

    Dissatisfaction and frustration with political leaders have sent students ... In the Democratic Republic of Congo, the Minister of Higher Education has ordered a ... Student Affairs will need to anticipate and find innovative ways to adjust ... Razia Mayet's article focuses on the effectiveness of learning development interventions.

  16. Online Education in Public Affairs

    Science.gov (United States)

    Ginn, Martha H.; Hammond, Augustine

    2012-01-01

    This exploratory study provides an overview of the current landscape of online education in the fields of Master of Public Administration and Master of Public Policy (MPA/MPP) utilizing a dataset compiled from content analysis of MPA/MPP programs' websites and survey of 96 National Association of Schools of Public Affairs and Administration…

  17. USSR Report, International Affairs

    Science.gov (United States)

    1986-03-14

    incidentally, we had to learn this several times, unfortunately) it is simpler to perform the order from metal than to put it together on paper: the...LO"# ^ *-* t-* O b fc c S 2 3 X P H UJ J5 CM tOtO O COtO co CM p efl o o E V <U IU ü Q ■« X) 3 a > « « o i- »« poo Sao...holds practically the entire adult population of the United States "under its thumb". It keeps dossiers on 54 million Americans who "present a

  18. Polar bears at risk

    Energy Technology Data Exchange (ETDEWEB)

    Norris, S.; Rosentrater, L.; Eid, P.M. [WWF International Arctic Programme, Oslo (Norway)

    2002-05-01

    Polar bears, the world's largest terrestrial carnivore, spend much of their lives on the arctic sea ice. This is where they hunt and move between feeding, denning, and resting areas. The world population, estimated at 22,000 bears, is made up of 20 relatively distinct populations varying in size from a few hundred to a few thousand animals. About 60 per cent of all polar bears are found in Canada. In general, the status of this species is stable, although there are pronounced differences between populations. Reductions in the extent and thickness of sea ice has lead the IUCN Polar Bear Specialist Group to describe climate change as one of the major threats facing polar bears today. Though the long-term effects of climate change will vary in different areas of the Arctic, impacts on the condition and reproductive success of polar bears and their prey are likely to be negative. Longer ice-free periods resulting from earlier break-up of sea ice in the spring and later formation in the fall is already impacting polar bears in the southern portions of their range. In Canada's Hudson Bay, for example, bears hunt on the ice through the winter and into early summer, after which the ice melts completely, forcing bears ashore to fast on stored fat until freeze-up in the fall. The time bears have on the ice to hunt and build up their body condition is cut short when the ice melts early. Studies from Hudson Bay show that for every week earlier that ice break-up occurs, bears will come ashore 10 kg lighter and in poorer condition. It is likely that populations of polar bears dividing their time between land and sea will be severely reduced and local extinctions may occur as greenhouse gas emissions continue to rise and sea ice melts. Expected changes in regional weather patterns will also impact polar bears. Rain in the late winter can cause maternity dens to collapse before females and cubs have departed, thus exposing occupants to the elements and to predators. Such

  19. The Research of Spatial-Temporal Analysis and Decision-Making Assistant System for Disabled Person Affairs Based on Mapworld

    Science.gov (United States)

    Zhang, J. H.; Yang, J.; Sun, Y. S.

    2015-06-01

    This system combines the Mapworld platform and informationization of disabled person affairs, uses the basic information of disabled person as center frame. Based on the disabled person population database, the affairs management system and the statistical account system, the data were effectively integrated and the united information resource database was built. Though the data analysis and mining, the system provides powerful data support to the decision making, the affairs managing and the public serving. It finally realizes the rationalization, normalization and scientization of disabled person affairs management. It also makes significant contributions to the great-leap-forward development of the informationization of China Disabled Person's Federation.

  20. Heidelberg polarized alkali source

    International Nuclear Information System (INIS)

    Kraemer, D.; Steffens, E.; Jaensch, H.; Philipps Universitaet, Marburg, Germany)

    1984-01-01

    A new atomic beam type polarized alkali ion source has been installed at Heidelberg. In order to improve the beam polarization considerably optical pumping is applied in combination with an adiabatic medium field transition which results in beams in single hyperfine sublevels. The m state population is determined by laser-induced fluorescence spectroscopy. Highly polarized beams (P/sub s/ > 0.9, s = z, zz) with intensities of 30 to 130 μA can be extracted for Li + and Na + , respectively

  1. Intersectionality in Student Affairs: Perspective from a Senior Student Affairs Officer

    Science.gov (United States)

    Moneta, Larry

    2017-01-01

    The author draws upon over four decades of experience in student affairs administration to investigate how senior student affairs officers can incorporate intersectionality into comprehensive and targeted decision-making processes, strategic planning, and organizational considerations.

  2. Revolution in nuclear detection affairs

    International Nuclear Information System (INIS)

    Stern, Warren M.

    2014-01-01

    The detection of nuclear or radioactive materials for homeland or national security purposes is inherently difficult. This is one reason detection efforts must be seen as just one part of an overall nuclear defense strategy which includes, inter alia, material security, detection, interdiction, consequence management and recovery. Nevertheless, one could argue that there has been a revolution in detection affairs in the past several decades as the innovative application of new technology has changed the character and conduct of detection operations. This revolution will likely be most effectively reinforced in the coming decades with the networking of detectors and innovative application of anomaly detection algorithms

  3. JPRS Report:. Soviet Union, Political Affairs

    National Research Council Canada - National Science Library

    1990-01-01

    ...; REPUBLIC PARTY AND STATE AFFAIRS - Baltic Unity Efforts Assessed, Baltic Military District Loyal to USSR Law, Latvia Paramilitary Leader on Group's Role, Formation of Latvian Defense Units, Latvian...

  4. Hospital System Performance within Veterans Affairs

    Data.gov (United States)

    Department of Veterans Affairs — Strategic Analytics for Improvement and Learning Value Model or SAIL, is a system for summarizing hospital system performance within Veterans Health Administration...

  5. Spin polarized deuterium

    International Nuclear Information System (INIS)

    Glyde, H.R.; Hernadi, S.I.

    1986-01-01

    Several ground state properties of (electron) spin-polarized deuterium (D) such as the energy, single quasiparticle energies and lifetimes, Landau parameters and sound velocities are evaluated. The calculations begin with the Kolos-Wolneiwicz potential and use the Galitskii-FeynmanHartree-Fock (GFHF) approximation. The deuteron nucleas has spin I = 1, and spin states I/sub z/ = 1,0,-1. We explore D 1 , D 2 and D 3 in which, respectively, one spin state only is populated, two states are equally populated, and three states are equally populated. We find the GFHF describes D 1 well, but D 2 and D 3 less well. The Landau parameters, F/sub L/, are small compared to liquid 3 He and very small for doubly polarized D 1 (i.e. the F/sub L/ decrease with nuclear polarization)

  6. Polarization developments

    International Nuclear Information System (INIS)

    Prescott, C.Y.

    1993-07-01

    Recent developments in laser-driven photoemission sources of polarized electrons have made prospects for highly polarized electron beams in a future linear collider very promising. This talk discusses the experiences with the SLC polarized electron source, the recent progress with research into gallium arsenide and strained gallium arsenide as a photocathode material, and the suitability of these cathode materials for a future linear collider based on the parameters of the several linear collider designs that exist

  7. Journal of Student Affairs in Africa

    African Journals Online (AJOL)

    ... Advanced Search · Current Issue · Archives. Journal Homepage Image. The Journal of Student Affairs in Africa (JSAA) is an independent, peer-reviewed, multi-disciplinary, open-access academic journal that publishes scholarly research and reflective discussions about the theory and practice of student affairs in Africa.

  8. Enhancing the professionalisation of student affairs through ...

    African Journals Online (AJOL)

    The thought is that viewing assessment as an integral, rather than 'extra' aspect of student affairs and incorporating these activities within their work, student affairs professionals will not only improve the effectiveness of their work with students but also can help legitimise the field as a profession. Keywords: assessment ...

  9. Managing Student Affairs Programs: Methods, Models, Muddles.

    Science.gov (United States)

    Deegan, William L.

    Management processes and problems are examined in a variety of student affairs contexts. This book (1) proposes a theoretical framework for the analysis of management functions in colleges and universities, (2) studies the practice of management in several different student affairs contexts to uncover current practices, issues, problems, and…

  10. Possible Courses for News and Public Affairs

    Science.gov (United States)

    Wald, Richard C.

    1978-01-01

    Live programming, regular daily news programs, and documentary series, which are suggested as solutions to the limited scope of news and public affairs air time, would enable PBS to increase its coverage of news and public affairs. Some suggestions are also made for restructuring the functions of stations within the system to facilitate this…

  11. Public Affairs: Maintaining Credibility While Evolving with Strategic Communication

    National Research Council Canada - National Science Library

    McCarthy, Carla M

    2007-01-01

    Public affairs has been identified as a key component of strategic communication, but incorporating public affairs within a strategic communication framework within the military, without compromising...

  12. Neutron polarization

    International Nuclear Information System (INIS)

    Firk, F.W.K.

    1976-01-01

    Some recent experiments involving polarized neutrons are discussed; they demonstrate how polarization studies provide information on fundamental aspects of nuclear structure that cannot be obtained from more traditional neutron studies. Until recently, neutron polarization studies tended to be limited either to very low energies or to restricted regions at higher energies, determined by the kinematics of favorable (p, vector n) and (d, vector n) reactions. With the advent of high intensity pulsed electron and proton accelerators and of beams of vector polarized deuterons, this is no longer the case. One has entered an era in which neutron polarization experiments are now being carried out, in a routine way, throughout the entire range from thermal energies to tens-of-MeV. The significance of neutron polarization studies is illustrated in discussions of a wide variety of experiments that include the measurement of T-invariance in the β-decay of polarized neutrons, a search for the effects of meson exchange currents in the photo-disintegration of the deuteron, the determination of quantum numbers of states in the fission of aligned 235 U and 237 Np induced by polarized neutrons, and the double- and triple-scattering of fast neutrons by light nuclei

  13. Polarization holography

    DEFF Research Database (Denmark)

    Nikolova, L.; Ramanujam, P.S.

    Current research into holography is concerned with applications in optically storing, retrieving, and processing information. Polarization holography has many unique properties compared to conventional holography. It gives results in high efficiency, achromaticity, and special polarization...... properties. This books reviews the research carried out in this field over the last 15 years. The authors provide basic concepts in polarization and the propagation of light through anisotropic materials, before presenting a sound theoretical basis for polarization holography. The fabrication...... and characterization of azobenzene based materials, which remain the most efficient for the purpose, is described in detail. This is followed by a description of other materials that are used in polarization holography. An in-depth description of various applications, including display holography and optical storage...

  14. Ionic polarization

    International Nuclear Information System (INIS)

    Mahan, G.D.

    1992-01-01

    Ferroelectricity occurs in many different kinds of materials. Many of the technologically important solids, which are ferroelectric, can be classified as ionic. Any microscopic theory of ferroelectricity must contain a description of local polarization forces. We have collaborated in the development of a theory of ionic polarization which is quite successful. Its basic assumption is that the polarization is derived from the properties of the individual ions. We have applied this theory successfully to diverse subjects as linear and nonlinear optical response, phonon dispersion, and piezoelectricity. We have developed numerical methods using the local Density approximation to calculate the multipole polarizabilities of ions when subject to various fields. We have also developed methods of calculating the nonlinear hyperpolarizability, and showed that it can be used to explain light scattering experiments. This paper elaborates on this polarization theory

  15. Polarization experiments

    International Nuclear Information System (INIS)

    Halzen, F.

    1977-02-01

    In a theoretical review of polarization experiments two important points are emphasized: (a) their versatility and their relevance to a large variety of aspects of hadron physics (tests of basic symmetries; a probe of strong interaction dynamics; a tool for hadron spectroscopy); (b) the wealth of experimental data on polarization parameters in pp and np scattering in the Regge language and in the diffraction language. (author)

  16. Manager, Communications and Public Affairs | IDRC - International ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Works with the Director Corporate Communications and the Manager, ... a comprehensive public affairs program for IDRC to foster awareness, understanding and support for IDRC's ... Management (including Financial and Human Resources).

  17. Powers and Duties of Corporate Affairs Commission

    African Journals Online (AJOL)

    Mofasony

    POWERS AND DUTIES OF THE CORPORATE AFFAIRS. COMMISSION ... The Registrar-General is the Chief Executive of the Commission and is saddled .... Federal Board of Inland Revenue Department of the Ministry of Finance v). Register ...

  18. Global Summit on Student Affairs and Services

    African Journals Online (AJOL)

    introduced to the 3rd Global Summit on Student Affairs and Services that was hosted by Stellenbosch University (SU) in Cape Town, South Africa, this past .... students to act as partners and change agents in their educational experience.

  19. African Journal of International Affairs and Development

    African Journals Online (AJOL)

    African Journal of International Affairs and Development. ... Foreign Policy and Public Opinion: An Assessment of Ijebu Involvement in the Kiriji War ... Book Review: Critical Perspective's on Nigeria's International Economic Relations · EMAIL ...

  20. Public affairs events at Ocean Sciences Meeting

    Science.gov (United States)

    Uhlenbrock, Kristan

    2012-02-01

    AGU public affairs will be cohosting two special events at Ocean Sciences 2012 that offer scientists opportunities to expand their communication, policy, and media experience. Join the conversations that highlight two important topics to connect science to society.

  1. 41 CFR 105-53.142 - Office of Public Affairs.

    Science.gov (United States)

    2010-07-01

    ... 41 Public Contracts and Property Management 3 2010-07-01 2010-07-01 false Office of Public Affairs... Central Offices § 105-53.142 Office of Public Affairs. The Office of Public Affairs, headed by the Associate Administrator for Public Affairs, is responsible for the planning, implementation, and...

  2. [Establishment of response system to emergency parasitic disease affairs in China].

    Science.gov (United States)

    Chun-Li, C; Le-Ping, S; Qing-Biao, H; Bian-Li, X U; Bo, Z; Jian-Bing, L; Dan-Dan, L; Shi-Zhu, L I; Oning, X; Xiao-Nong, Z

    2017-08-14

    China's prevention and control of parasitic diseases has made remarkable achievements. However, the prevalence and transmission of parasitic diseases is impacted by the complicated natural and social factors of environment, natural disasters, population movements, and so on. Therefore, there are still the risks of the outbreak of emergency parasitic diseases affairs, which may affect the control effectiveness of parasitic diseases and endanger the social stability seriously. In this article, we aim at the analysis of typical cases of emergency parasitic disease affairs and their impacts on public health security in China in recently years, and we also elaborate the disposal characteristics of emergency parasitic disease affairs, and propose the establishment of response system to emergency parasitic disease affairs in China, including the organizational structure and response flow path, and in addition, point out that, in the future, we should strengthen the system construction and measures of the response system to emergency parasitic disease affairs, so as to control the risk and harm of parasitic disease spread as much as possible and to realize the early intervention and proper disposal of emergency parasitic disease affairs.

  3. Polarization measurement for internal polarized gaseous targets

    International Nuclear Information System (INIS)

    Ye Zhenyu; Ye Yunxiu; Lv Haijiang; Mao Yajun

    2004-01-01

    The authors present an introduction to internal polarized gaseous targets, polarization method, polarization measurement method and procedure. To get the total nuclear polarization of hydrogen atoms (including the polarization of the recombined hydrogen molecules) in the target cell, authors have measured the parameters relating to atomic polarization and polarized hydrogen atoms and molecules. The total polarization of the target during our measurement is P T =0.853 ± 0.036. (authors)

  4. Telehealth at the US Department of Veterans Affairs after Hurricane Sandy.

    Science.gov (United States)

    Der-Martirosian, Claudia; Griffin, Anne R; Chu, Karen; Dobalian, Aram

    2018-01-01

    Background Like other integrated health systems, the US Department of Veterans Affairs has widely implemented telehealth during the past decade to improve access to care for its patient population. During major crises, the US Department of Veterans Affairs has the potential to transition healthcare delivery from traditional care to telecare. This paper identifies the types of Veterans Affairs telehealth services used during Hurricane Sandy (2012), and examines the patient characteristics of those users. Methods This study conducted both quantitative and qualitative analyses. Veterans Affairs administrative and clinical data files were used to illustrate the use of telehealth services 12 months pre- and 12 months post- Hurricane Sandy. In-person interviews with 31 key informants at the Manhattan Veterans Affairs Medical Center three-months post- Hurricane Sandy were used to identify major themes related to telecare. Results During the seven-month period of hospital closure at the Manhattan Veterans Affairs Medical Center after Hurricane Sandy, in-person patient visits decreased dramatically while telehealth visits increased substantially, suggesting that telecare was used in lieu of in-person care for some vulnerable patients. The most commonly used types of Veterans Affairs telehealth services included primary care, triage, mental health, home health, and ancillary services. Using qualitative analyses, three themes emerged from the interviews regarding the use of Veterans Affairs telecare post- Hurricane Sandy: patient safety, provision of telecare, and patient outreach. Conclusion Telehealth offers the potential to improve post-disaster access to and coordination of care. More information is needed to better understand how telehealth can change the processes and outcomes during disasters. Future studies should also evaluate key elements, such as adequate resources, regulatory and technology issues, workflow integration, provider resistance, diagnostic fidelity and

  5. Sources of polarized neutrons

    International Nuclear Information System (INIS)

    Walter, L.

    1983-01-01

    Various sources of polarized neutrons are reviewed. Monoenergetic source produced with unpolarized or polarized beams, white sources of polarized neutrons, production by transmissions through polarized hydrogen targets and polarized thermal neutronsare discussed, with appropriate applications included. (U.K.)

  6. Putting Descartes before the Horse: Opportunities for Advancing the Student Affairs Link with Academic Affairs.

    Science.gov (United States)

    Lamarid, Lucas

    1999-01-01

    Article challenges the division between student and academic affairs and encourages a view of learning and reason in a more holistic and integrated fashion. Outlines the historical factors for the separation of student and academic affairs and offers the programs instituted at Bellarmine College as examples of effective collaboration between…

  7. Plasma polarization spectroscopy. History and future prospects

    International Nuclear Information System (INIS)

    Fujimoto, Takashi

    2002-01-01

    An intuitive account is given of the polarized emission line of atoms and ions, both classically and quantum mechanically. Polarization is a result of the population imbalance among the magnetic sublevels, or of the alignment, in the upper level. The history of Plasma Polarization Spectroscopy (PPS) is reviewed. Various polarization phenomena are divided into three classes. For each of the classes, typical experiments undertaken so far are reviewed. The advantages, limitations, and challenges regarding PPS are discussed. (author)

  8. Polarization study

    International Nuclear Information System (INIS)

    Nurushev, S.B.

    1989-01-01

    Brief review is presented of the high energy polarization study including experimental data and the theoretical descriptions. The mostimportant proposals at the biggest accelerators and the crucial technical developments are also listed which may become a main-line of spin physics. 35 refs.; 10 figs.; 4 tabs

  9. Polar Stratigraphy

    Science.gov (United States)

    1999-01-01

    These three images were taken on three different orbits over the north polar cap in April 1999. Each shows a different part of the same ice-free trough. The left and right images are separated by a distance of more than 100 kilometers (62 miles). Note the similar layers in each image.

  10. The Veteran Population Projection 2014

    Data.gov (United States)

    Department of Veterans Affairs — VetPop2014 is an actuarial projection model developed by the Office of the Actuary (OACT) for Veteran population projection from Fiscal Year FY2014 to FY2043. Using...

  11. Disseminated Museum Displays and Participation of Students from Underrepresented Populations in Polar Research: Education and Outreach for Joint Projects in GPS and Seismology Solid Earth Science Community

    Science.gov (United States)

    Eriksson, S. C.; Wilson, T. J.; Anandakrishnan, S.; Aster, R. C.; Johns, B.; Anderson, K.; Taber, J.

    2006-12-01

    Two Antarctic projects developed by solid earth scientists in the GPS and seismology communities have rich education and outreach activities focused on disseminating information gleaned from this research and on including students from underrepresented groups. Members of the UNAVCO and IRIS research consortia along with international partners from Australia, Canada, Chile, Germany, Italy, New Zealand and the U.K. aim to deploy an ambitious GPS/seismic network to observe the Antarctic glaciological and geologic system using a multidisciplinary and internationally coordinated approach. The second project supports this network. UNAVCO and IRIS are designing and building a reliable power and communication system for autonomous polar station operation which use the latest power and communication technologies for ease of deployment and reliable multi-year operation in severe polar environments. This project will disseminate research results through an IPY/POLENET web-based museum style display based on the next-generation "Museum Lite" capability primarily supported by IRIS. "Museum Lite" uses a standard PC, touch-screen monitor, and standard Internet browsers to exploit the scalability and access of the Internet and to provide customizable content in an interactive setting. The unit is suitable for research departments, public schools, and an assortment of public venues, and can provide wide access to real-time geophysical data, ongoing research, and general information. The POLENET group will work with members of the two consortia to provide content about the project and polar science in general. One unit is to be installed at Barrow's Ilisagvit College through the Barrow Arctic Science Consortium, one at McMurdo Station in Antarctica, and two at other sites to be determined (likely in New Zealand/Australia and in the U.S.). In January, 2006, Museum Lite exhibit was installed at the Amundsen-Scott South Pole Station. Evaluation of this prototype is underway. These

  12. Dynamic polarization of radioactive nuclei

    International Nuclear Information System (INIS)

    Kiselev, Yu.F.; Lyuboshits, V.L.; )

    2001-01-01

    Radioactive nuclei, embedded into a frozen polarized proton target, atr proposed to polarize by means of some dynamic polarization methods. Angular distributions of γ-quanta emitted ny 22 Na(3 + ) in the cascade β-γ-radiation are calculated. It is shown that this distribution does not depend on the spin temperature sing at the Boltzmann distribution of populations among the Zeeman magnetic substates, whereas the tensor polarization of quadrupole nuclei, placed in the electric field of the crystal, causes the considerable sing dependence. The new method promises wide opportunities for the magnetic structure investigations as well as for the study of spin-spin interaction dynamics of rare nuclei in dielectrics. Physical-technical advantages and disadvantages of the given method are discussed for the polarization of heavy nuclei in the on-line implantation mode [ru

  13. Issues and Challenges in Student Affairs and Services Around

    African Journals Online (AJOL)

    English for Academic Purposes Professor at Algonquin. College, Ontario, Canada. .... of the Asia-Pacific Journal for Student Affairs: The Official Journal of the Philippine Association of Administrators of Student Affairs (PAASA). And finally, this ...

  14. Public Affairs Capacity Building: A Soft Tool for Combatant Commanders

    National Research Council Canada - National Science Library

    Salata, Jason P

    2008-01-01

    .... This paper examines the soft power application of public affairs capacity building, and the resultant cultivation of a public affairs social network through the lens of social network theory (nodes and ties...

  15. TTI Phase 2 Institutional Support: The Institute of Economic Affairs ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    TTI Phase 2 Institutional Support: The Institute of Economic Affairs, Ghana ... the Institute of Economic Affairs' (IEA-Ghana) role as a credible public policy ... public policy, facilitate private sector-led economic growth, and strengthen democracy.

  16. Global Affairs Canada | IDRC - International Development Research ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    For example, Vietnamese and Canadian research teams developed micronutrient-enriched instant flours and baby cereals using local crops and local processing facilities. Global Affairs Canada, IDRC, and the Canadian Institutes of Health Research are collaborating to improve health outcomes for African mothers and ...

  17. JPRS Report, Soviet Union, Military Affairs.

    Science.gov (United States)

    1988-01-07

    Meetings of students and veterans, militarized physical culture celebrations , department and school activities which develop a sense of patriotism, formal...they capable of making military affairs interesting to a young men in Adidas jackets with dyed- hackle hairdos, of getting them to love military

  18. Public Affairs Manual. Revised 1976 Edition.

    Science.gov (United States)

    American Alliance for Health, Physical Education, and Recreation, Washington, DC.

    This public affairs manual is designed for health, physical education, and recreation personnel. It begins with a position statement by the American Alliance for Health, Physical Education, and Recreation (AAHPER). In section two, resources and procedures for crises action at the local and state level are discussed. Several organizational models…

  19. JPRS Report. Soviet Union: Political Affairs.

    Science.gov (United States)

    1990-09-13

    cultivating the idea of forming a circle of domestic correspondents who would be fully immersed in studying parliamentary affairs, acquiring the neces...is to deal with ecological problems, and especially hydrobiologists in the field of ecotoxicology , to use as their tools the basic principles of

  20. JPRS Report, Soviet Union, Political Affairs

    Science.gov (United States)

    1989-07-27

    skillfully shift animal husbandry to the summer work regime, and to ensure the sheep are sheared. JPRS-UPA-89-046 27 JULY 1989 16 PARTY, STATE AFFAIRS... vineyards . Vegetable plantations must replant on an urgent basis, and also prepare right now for receiving, processing and storing fruit and

  1. Homeland Security Affairs Journal (press release)

    OpenAIRE

    Naval Postgraduate School (U.S.); Center for Homeland Defense and Security

    2013-01-01

    Homeland Security Affairs (HSA) is the peer-reviewed online journal of the Center for Homeland Defense and Security (CHDS). The journal provides a forum to propose and debate strategies, policies and organizational arrangements to strengthen U.S. homeland security.

  2. Undergraduate Consumer Affairs Program Needs: Employers' Perspectives

    Science.gov (United States)

    Morrison, Kathryn; Saboe-Wounded Head, Lorna; Cho, Soo Hyun

    2012-01-01

    Forty-six Consumer Affairs (CA) internship supervisors were surveyed to identify critical knowledge and skills demonstrated by interns and to examine the importance of knowledge and skills needed in the workplace from the supervisors' perspectives.The knowledge and skills measured were identified through program goals. Results revealed that CA…

  3. Addressing Sexual Violence as Student Affairs Work

    Science.gov (United States)

    Landreman, Lisa M.; Williamsen, Kaaren M.

    2018-01-01

    In this chapter, we outline the challenges campuses face in addressing sexual violence and Title IX compliance. We argue that there are critical roles for student affairs professionals in Title IX work in developing effective campus sexual violence prevention and response strategies.

  4. Affective Commitment among Student Affairs Professionals

    Science.gov (United States)

    Boehman, Joseph

    2007-01-01

    Student affairs professionals in the United States were surveyed to determine the predictive value of overall job satisfaction, organizational support, organizational politics, and work/nonwork interaction on affective organizational commitment. Results indicate that a supportive work environment leads to increased affective attachment to the…

  5. Student Affairs as Perceived Through Abraham Maslow's Hierarchy of Needs.

    Science.gov (United States)

    Nowacki, Steven

    The needs of human behavior are explored and correlated to the various departments within Student Affairs in an effort to show how Student Affairs can satisfy those needs. Maslow's Hierarchy of needs is briefly explained and related to the following Student Affairs departments: Financial Aid, Student Management, Career Development and Placement,…

  6. 48 CFR 952.204-75 - Public affairs.

    Science.gov (United States)

    2010-10-01

    ... 48 Federal Acquisition Regulations System 5 2010-10-01 2010-10-01 false Public affairs. 952.204-75... SOLICITATION PROVISIONS AND CONTRACT CLAUSES Text of Provisions and Clauses 952.204-75 Public affairs. As prescribed in 904.7201, insert the following clause: Public Affairs (DEC 2000) (a) The Contractor must...

  7. Polar Polygons

    Science.gov (United States)

    2005-01-01

    18 August 2005 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows dark-outlined polygons on a frost-covered surface in the south polar region of Mars. In summer, this surface would not be bright and the polygons would not have dark outlines--these are a product of the presence of seasonal frost. Location near: 77.2oS, 204.8oW Image width: width: 3 km (1.9 mi) Illumination from: upper left Season: Southern Spring

  8. Strategic Polarization.

    Science.gov (United States)

    Kalai, Adam; Kalai, Ehud

    2001-08-01

    In joint decision making, similarly minded people may take opposite positions. Consider the example of a marriage in which one spouse gives generously to charity while the other donates nothing. Such "polarization" may misrepresent what is, in actuality, a small discrepancy in preferences. It may be that the donating spouse would like to see 10% of their combined income go to charity each year, while the apparently frugal spouse would like to see 8% donated. A simple game-theoretic analysis suggests that the spouses will end up donating 10% and 0%, respectively. By generalizing this argument to a larger class of games, we provide strategic justification for polarization in many situations such as debates, shared living accommodations, and disciplining children. In some of these examples, an arbitrarily small disagreement in preferences leads to an arbitrarily large loss in utility for all participants. Such small disagreements may also destabilize what, from game-theoretic point of view, is a very stable equilibrium. Copyright 2001 Academic Press.

  9. Trophic calculations reveal the mechanism of population-level variation in mercury concentrations between marine ecosystems: Case studies of two polar seabirds

    International Nuclear Information System (INIS)

    Brasso, Rebecka L.; Polito, Michael J.

    2013-01-01

    Highlights: • Ecosystem-specific baseline and consumer δ 15 N paired for population-specific trophic level. • Source of population-level variation in mercury exposure identified in two seabirds. • High mercury and trophic position suggests trophic driver of population-level variation. • Trophic similarities, differing mercury reveals geographic differences in bioavailability. -- Abstract: The incorporation of quantitative trophic level analysis in ecotoxicological studies provides explanatory power to identify the factors, trophic or environmental, driving population-level variation in mercury exposure at large geographic scales. In the Antarctic marine ecosystem, mercury concentrations and stable isotope values in Adélie penguins (Pygoscelis adeliae) were compared between the Antarctic Peninsula and the Ross Sea. Correcting tissue δ 15 N values for baseline δ 15 N values revealed population-level differences in trophic position which contributes to differences in mercury. Data from Thick-billed murres (Uria lomvia) were synthesized from published values from Baffin Bay and Svalbard to demonstrate the utility of baseline δ 15 N values in identifying differences in environmental mercury exposure independent of diet. Here, we demonstrate the importance of calculating population-specific trophic level data to uncover the source of variation in mercury concentrations between geographically distinct populations of marine predators

  10. Preferential magnetic nanoparticle uptake by bone marrow derived macrophages sub-populations: effect of surface coating on polarization, toxicity, and in vivo MRI detection

    Energy Technology Data Exchange (ETDEWEB)

    Al Faraj, Achraf, E-mail: aalfaraj@ksu.edu.sa [College of Applied Medical Sciences, King Saud University, Molecular and Cellular Imaging Lab, Department of Radiological Sciences (Saudi Arabia)

    2013-07-15

    Noninvasive imaging of macrophages activity has raised increasing interest for diagnosis of different diseases, which make them attractive vehicles to deliver contrast agents or drugs for diagnostic or therapeutic purposes. In this study, the effect of polyethylene glycol functionalization of magnetic iron oxide nanoparticles and their further surface modification with carboxylic groups on bone marrow-derived M1 and M2 macrophages phenotype, labeling efficiency, uptake mechanism, biocompatibility, and their in vivo MR detection was assessed. An enhanced labeling efficiency was observed for carboxylic surface-modified superparamagnetic iron oxide (SPIO) compared to PEGylated SPIO and to a higher extent to plain SPIO along with a higher uptake by M2 subsets. Magnetic nanoparticles were found located in the periphery of the vesicles dispersed in the cytoplasm in TEM. Investigation of the labeling mechanism by inhibiting different uptake pathways revealed that endocytosis via scavenger receptor A, a process known to be clathrin mediated, plays a central role in the cellular uptake kinetics of both macrophages subpopulations. Biocompatibility evaluation showed no variation in cell viability and mitochondrial membrane potential with a low release of ROS. Flow cytometry and measurement of iNOS and Arginase 1 activity as marker of M1 and M2 macrophages polarization confirmed that magnetic labeling of macrophages subsets did not affect their polarization. In addition, no variation was observed in the biodistribution of magnetic iron oxide-labeled M1 and M2 macrophages subsets when monitored using noninvasive magnetic resonance imaging with a better detection for the enhanced SPIO-PEG-COOH-labeled cells.

  11. Preferential magnetic nanoparticle uptake by bone marrow derived macrophages sub-populations: effect of surface coating on polarization, toxicity, and in vivo MRI detection

    International Nuclear Information System (INIS)

    Al Faraj, Achraf

    2013-01-01

    Noninvasive imaging of macrophages activity has raised increasing interest for diagnosis of different diseases, which make them attractive vehicles to deliver contrast agents or drugs for diagnostic or therapeutic purposes. In this study, the effect of polyethylene glycol functionalization of magnetic iron oxide nanoparticles and their further surface modification with carboxylic groups on bone marrow-derived M1 and M2 macrophages phenotype, labeling efficiency, uptake mechanism, biocompatibility, and their in vivo MR detection was assessed. An enhanced labeling efficiency was observed for carboxylic surface-modified superparamagnetic iron oxide (SPIO) compared to PEGylated SPIO and to a higher extent to plain SPIO along with a higher uptake by M2 subsets. Magnetic nanoparticles were found located in the periphery of the vesicles dispersed in the cytoplasm in TEM. Investigation of the labeling mechanism by inhibiting different uptake pathways revealed that endocytosis via scavenger receptor A, a process known to be clathrin mediated, plays a central role in the cellular uptake kinetics of both macrophages subpopulations. Biocompatibility evaluation showed no variation in cell viability and mitochondrial membrane potential with a low release of ROS. Flow cytometry and measurement of iNOS and Arginase 1 activity as marker of M1 and M2 macrophages polarization confirmed that magnetic labeling of macrophages subsets did not affect their polarization. In addition, no variation was observed in the biodistribution of magnetic iron oxide-labeled M1 and M2 macrophages subsets when monitored using noninvasive magnetic resonance imaging with a better detection for the enhanced SPIO–PEG–COOH-labeled cells

  12. Polarized secondary radioactive beams

    International Nuclear Information System (INIS)

    Zaika, N.I.

    1992-01-01

    Three methods of polarized radioactive nuclei beam production: a) a method nuclear interaction of the non-polarized or polarized charged projectiles with target nuclei; b) a method of polarization of stopped reaction radioactive products in a special polarized ion source with than following acceleration; c) a polarization of radioactive nuclei circulating in a storage ring are considered. Possible life times of the radioactive ions for these methods are determined. General schemes of the polarization method realizations and depolarization problems are discussed

  13. The 'Transnuklear affair' and its consequences

    International Nuclear Information System (INIS)

    Brinkert, M.

    1992-01-01

    The 'Bribe' and 'Drum' Affairs and suspected proliferation in connection with Transnuklear GmbH public around the turn of 1987/88. Many members of the press wished them to speed up the process of opting out of nuclear power. However, none of the accusations specifically related to nuclear power leveled at that time turned out to be tenable. Instead, all violations of the law which had been detected could have been punished in the same way as in any other branch of industry. As a consequence, the impacts arising to regulatory structures in the nuclear sector, especially the measures taken by the Federal Government, may be considered to have been unjustified in scope. The TN Affair and the associated litigation has caused a great deal of confidence in nuclear power to be lost, which now has to be reclaimed by purposeful public relations efforts. (orig.) [de

  14. Polar crane

    International Nuclear Information System (INIS)

    Makosinski, S.

    1981-01-01

    In many applications polar cranes have to be repeatedly positioned with high accuracy. A guidance system is disclosed which has two pairs of guides. Each guide consists of two rollers carried by a sheave rotatable mounted on the crane bridge, the rollers being locatable one on each side of a guideway, e.g. the circular track on which the bridge runs. The pairs of guides are interconnected by respective rope loops which pass around and are locked to the respective pairs of sheaves in such a manner that movement of one guide results in equal movement of the other guide in a sense to maintain the repeatability of positioning of the centre of the bridge. A hydraulically-linked guide system is also described. (author)

  15. JPRS Report, Soviet Union, International Affairs.

    Science.gov (United States)

    1987-09-14

    de estudios internationales (CEPEI), Lima, 1986, XXXVI+498 pp] [Text] The latest publication of the Peruvian Center for International Research is...United States on the Malvinas Islands and Easter Island (p 377). Mercado Harrin, former minister of foreign affairs and prime minister of Peru who...urgent tasks in the realm of foreign policy. E. Mercado Harrin, analyzing the geopolitical climate in Latin America after the Malvinas conflict of

  16. ANALYSIS AND MANAGEMENT RISK IN INTERNATIONAL AFFAIRS

    OpenAIRE

    Lăpăduşi Mihaela Loredana,; Căruntu Constantin

    2009-01-01

    The risk is one of the most controversial issues for all persons involved both in domestic and international world economic affairs. The need to analyze, understand and effectively manage risk is growing, the ultimate aim being to obtain a higher degree of successThe risk means exposure to an uncertain future, the opportunity to face danger or suffering a loss ( "Risk - possibility of loss or injury", Webster's, 1995) or the chance that things go wrong ( "Risk is the change that something wil...

  17. JPRS Report, Soviet Union, Political Affairs

    Science.gov (United States)

    1989-09-27

    the popular "On-Duty Reporter" column , Yeliza- veta Bogoslovskaya, Sergey Chesnokov, and Galina Sapunova, literally have not gotten off the telephone...Affairs E . A. Didorenko. He has demonstrated the kind of admirable energy that he has failed to show in the fight against crime. Back on 23 February...Our editorial welcomed E . A. Didorenko’s and TASH- KENTSKAYA PRAVDA’s desire to shed light on many problems of interethnic relations and the

  18. Polar Biomedical Research - An Assessment.

    Science.gov (United States)

    1982-10-01

    on agriculture and imported food and fuel silviculture Attenuated solar spectrum Reduces ultraviolet radiation, leading to possible vitamin D...for an expanded population. Any experiments in polar regions in food production involving geothermal heat, solar energy, hydroponics, or aquaculture...to water problems are those of accumulation of solid waste. During winter, such waste, including garbage and disposable diapers , near dwellings is a

  19. Nuclear polarization and neutrons

    International Nuclear Information System (INIS)

    Glaettli, H.

    1985-01-01

    Different possibilities for the use of polarized nuclei in thermal neutron scattering on condensed matter are reviewed. Highly polarized nuclei are the starting point for studying dipolar magnetic order. Systematic measurement of spin-dependent scattering lengths is possible on samples with polarized nuclei. Highly polarized hydrogen should help to unravel complicated structures in chemistry and biology. The use of polarized proton targets as an energy-independent neutron polarizer in the thermal and epithermal region should be considered afresh. (author)

  20. Neutron polarization in polarized 3He targets

    International Nuclear Information System (INIS)

    Friar, J.L.; Gibson, B.F.; Payne, G.L.; Bernstein, A.M.; Chupp, T.E.

    1990-01-01

    Simple formulas for the neutron and proton polarizations in polarized 3 He targets are derived assuming (1) quasielastic final states; (2) no final-state interactions; (3) no meson-exchange currents; (4) large momentum transfers; (5) factorizability of 3 He SU(4) response-function components. Numerical results from a wide variety of bound-state solutions of the Faddeev equations are presented. It is found that this simple model predicts the polarization of neutrons in a fully polarized 3 He target to be 87%, while protons should have a slight residual polarization of -2.7%. Numerical studies show that this model works very well for quasielastic electron scattering

  1. Sacco e Vanzetti: caso giudiziario o affaire?

    Directory of Open Access Journals (Sweden)

    Flavia Tudini

    2013-08-01

    Full Text Available This article focus on maybe the most striking judicial case in America during the early twenieth century. The Sacco and Vanzetti case. There is a widespead awareness about the crime they were accused for, the trial phases and their tragic end, but what about the defensive strategies adopted by their lawyers? The analisys of this theme and the involvement of the pubblic opinion demostrates how this jucidial case bacame an affaire, with a disrupting international eco, underestimated even by U.S. authorities. The pubblic opinion will elevate the two anarchists, crushed by injustice and the political trial, to icons of political struggle against the system.

  2. Public affairs events at Fall Meeting

    Science.gov (United States)

    Uhlenbrock, Kristan

    2012-02-01

    AGU's Public Affairs team presented two workshop luncheons and hosted 17 oral and poster sessions at the 2011 Fall Meeting. Topics ranged from defining the importance of the geosciences, to climate change science for communities and institutions. The workshop luncheon "How to Be a Congressional Science Fellow or Mass Media Fellow" was a well-attended event with more than 115 participants. The luncheon provided the opportunity for audience members to ask fellow scientists about their experiences working either in Congress or as a reporter for a news organization. For scientists looking to expand their expertise outside the academic environment, these AGU fellowships are fantastic opportunities.

  3. USSR Report, Political and Sociological Affairs

    Science.gov (United States)

    1984-06-22

    resolutions on Namibia. However, the world has not failed to note that France and Britain have demonstrated some realism on that problem and have...Kagoshima, in a few days’ time. Seven ships of Japan’s navy and of the US 7th Fleet, two British patrol ships and a French destroyer will take...affairs in the Far East and in the history of war art. That event is well remembered in our country. Our poeple associate it with the stupid avarice of

  4. East Europe Report, Political, Sociological and Military Affairs

    National Research Council Canada - National Science Library

    1984-01-01

    Partial Contents: International Affairs, Radio, Birthday Celebration, School Anniversary, Cultural Agreement, Presidents, Trade Union Bureau, Education, Olympic Committee, Ambassador, Conference, Exhibition, Campaign...

  5. Student Affairs Case Management: Merging Social Work Theory with Student Affairs Practice

    Science.gov (United States)

    Adams, Sharrika D.; Hazelwood, Sherry; Hayden, Bruce

    2014-01-01

    Case management is a functional area in higher education and student affairs that emerged after the mass shootings at Virginia Tech in 2007. Although new to higher education, case management emerged from established social work practice. This article compares social work theory and case management standards with a new case management model for…

  6. Perceptions regarding cardiothoracic surgical training at Veterans Affairs hospitals.

    Science.gov (United States)

    Bakaeen, Faisal G; Stephens, Elizabeth H; Chu, Danny; Holman, William L; Vaporciyan, Ara A; Merrill, Walter H; Grover, Frederick L

    2011-05-01

    With cardiothoracic education going through a critical phase of reevaluation and adaptation, we investigated perceptions of Veterans Affairs hospitals in cardiothoracic training. A content-validated survey was distributed electronically to 676 cardiothoracic surgery residents, recent cardiothoracic graduates (on or after June 2006), cardiothoracic surgery chairpersons, program directors, associate program directors, and section heads. The Cardiothoracic Surgery Network was used to identify target recipients and their e-mail addresses. Forty-three percent of the target recipients (292/676) completed the survey. Of those who were residents, 59% (65/111) rotated at a Veterans Affairs hospital during their cardiothoracic training; this rotation accounted for 25% or more of the total training period for 19% of them (21/111). A Veterans Affairs appointment was held by 42% of program directors/chairpersons (20/48) and 24% of graduates, associate program directors, and section heads (31/129). An affiliation with a Veterans Affairs hospital was rated as somewhat to very beneficial by 93% of the responders (273/292), and the cardiothoracic training received at Veterans Affairs facilities was rated as good to excellent by 73% of the responders (213/292). Sixty-nine percent of respondents (201/292) reported the operating room environment at Veterans Affairs hospitals to be at least as conducive to learning as that at the affiliate teaching hospital, and 76% (223/292) indicated that residents get more autonomy and hands-on experience at Veterans Affairs institutions. In addition, 64% of responders (188/292) reported that they would seek or recommend a Veterans Affairs job. Responses were positive toward the Veterans Affairs system regardless of whether the responder had any Veterans Affairs affiliation (ie, appointment as staff or rotation as resident); however, a Veterans Affairs affiliation was associated with a higher rate of positive responses regarding Veterans Affairs

  7. Stationary spiraling eddies in presence of polar amplification of global warming as a governing factor of ecology of Greenland seals White Sea population: results of verification study

    Science.gov (United States)

    Melentyev, K.; Chernook, V.; Melentyev, V.

    2003-04-01

    Ice-associated forms of marine mammals are representatives of a high level of fodder chains in the ocean and taxation of population number for different group, as assessment of ecology and animal welfare are the important tasks for marine biology, ecology, fishery and other application uses. Many problems create a global warming and antropogenical impact on marine and coastal ecosystem. In order to investigate ice covered Arctic Ocean and charting the number of seals were performed annual inspections onboard research aircraft PINRO "Arktika". Multi-spectral airborne and satellite observations were fulfilled regularly from Barents and White Sea to the Bering and Okhotsk Sea (1996-2002). A contemporary status of different group of sea mammals was evaluated, where number of adults and pups were checked separately. In situ observations were provided with using helicopter and icebreaker for gathering a water samples and ice cores (with following biochemical and toxicological analysis). A prevailing part of life cycle of Greenland seals (harp seal) is strongly depended from winter hydrology (water masses, stable currents, meandering fronts, stationary eddies) and closely connected with type of ice (pack, fast ice) and other parameters of ice (age, origin, salinity, ice edge.). First-year ice floes which has a specific properties and distinctive features are used by harp seals for pupping, lactation, molting, pairing and resting. Ringed seals, inversely, use for corresponding purposes only fast-ice. Different aspects of ecology, and migration features of harp seals were analyzed in frame of verification study. It was revealed a scale of influence of winter severity and wind regime, but stationary eddies in the White Sea is most effective governing factor (novelty). Following relationship " eddies - ecology of Greenland seal White Sea population " will be discussed: A) regularities of eddies formation and their spatial arrangement, temporal (seasonal and annual

  8. Polarized electron sources

    International Nuclear Information System (INIS)

    Prepost, R.

    1994-01-01

    The fundamentals of polarized electron sources are described with particular application to the Stanford Linear Accelerator Center. The SLAC polarized electron source is based on the principle of polarized photoemission from Gallium Arsenide. Recent developments using epitaxially grown, strained Gallium Arsenide cathodes have made it possible to obtain electron polarization significantly in excess of the conventional 50% polarization limit. The basic principles for Gallium and Arsenide polarized photoemitters are reviewed, and the extension of the basic technique to strained cathode structures is described. Results from laboratory measurements of strained photocathodes as well as operational results from the SLAC polarized source are presented

  9. Polarized electron sources

    Energy Technology Data Exchange (ETDEWEB)

    Prepost, R. [Univ. of Wisconsin, Madison, WI (United States)

    1994-12-01

    The fundamentals of polarized electron sources are described with particular application to the Stanford Linear Accelerator Center. The SLAC polarized electron source is based on the principle of polarized photoemission from Gallium Arsenide. Recent developments using epitaxially grown, strained Gallium Arsenide cathodes have made it possible to obtain electron polarization significantly in excess of the conventional 50% polarization limit. The basic principles for Gallium and Arsenide polarized photoemitters are reviewed, and the extension of the basic technique to strained cathode structures is described. Results from laboratory measurements of strained photocathodes as well as operational results from the SLAC polarized source are presented.

  10. Polarized neutron spectrometer

    International Nuclear Information System (INIS)

    Abov, Yu.G.; Novitskij, V.V.; Alfimenkov, V.P.; Galinskij, E.M.; Mareev, Yu.D.; Pikel'ner, L.B.; Chernikov, A.N.; Lason', L.; Tsulaya, V.M.; Tsulaya, M.I.

    2000-01-01

    The polarized neutron spectrometer, intended for studying the interaction of polarized neutrons with nuclei and condensed media in the area of energies from thermal up to several electron-volt, is developed at the IBR-2 reactor (JINR, Dubna). Diffraction on the Co(92%)-Fe(8%) magnetized monocrystals is used for the neutron polarization and polarization analysis. The neutron polarization within the whole energy range equals ∼ 95% [ru

  11. International Affairs Programs: The Air Force Versus the Army

    Science.gov (United States)

    2015-10-01

    individual tutoring programs . Additionally RAS personnel are offered regional enhancement studies opportunities at several facilities.48 RAS personnel...AU/ACSC/2015 AIR COMMAND AND STAFF COLLEGE AIR UNIVERSITY INTERNATIONAL AFFAIRS PROGRAMS : THE AIR FORCE VERSUS THE ARMY by Robin L...5 COMPARISON: INTERNATIONAL AFFAIRS PROGRAMS AIR FORCE VERSUS ARMY 8

  12. 77 FR 52379 - Advisory Committee on Veterans Business Affairs

    Science.gov (United States)

    2012-08-29

    ... SMALL BUSINESS ADMINISTRATION Advisory Committee on Veterans Business Affairs AGENCY: U.S. Small Business Administration. ACTION: Notice of open Federal Advisory Committee meeting. SUMMARY: The SBA is... Committee on Veterans Business Affairs. The meeting will be open to the public. DATES: September 10, 2012...

  13. 78 FR 70088 - Advisory Committee on Veterans Business Affairs

    Science.gov (United States)

    2013-11-22

    ... SMALL BUSINESS ADMINISTRATION Advisory Committee on Veterans Business Affairs AGENCY: U.S. Small Business Administration. ACTION: Notice of open Federal Advisory Committee meeting. SUMMARY: The SBA is... Committee on Veterans Business Affairs. The meeting will be open to the public. DATES: December 5, 2013 from...

  14. 75 FR 22434 - Advisory Committee on Veterans Business Affairs

    Science.gov (United States)

    2010-04-28

    ... SMALL BUSINESS ADMINISTRATION Advisory Committee on Veterans Business Affairs AGENCY: U.S. Small Business Administration. ACTION: Notice of open Federal Advisory Committee Meeting. SUMMARY: The SBA is... Committee on Veterans Business Affairs. The meeting will be open to the public. DATES: Tuesday, May 25, 2010...

  15. Public Affairs & Strategic Communications (NGB-PA) - Personal Staff - Joint

    Science.gov (United States)

    guards, exhibit displays and speakers. Learn more about Community Relations Public Queries If you are Guard ARNG Media ARNG Public Affairs Family Services Youth Programs Survivor Services Military Funeral General Officer Management Public Affairs Executive Support Services Legislative Liaison Special Staff

  16. Powers and Duties of the Corporate Affairs Commission as a ...

    African Journals Online (AJOL)

    The Corporate Affairs Commission was established by section 1 of the Companies and Allied Matters Act, Cap C.20, Laws of the Federation of Nigeria, 2004 (CAMA). The Corporate Affairs Commission is a regulatory body, established to regulate the incorporation, running and winding up of companies, business names and ...

  17. Community Relations - Public Affairs - Personal Staff - Joint Staff - The

    Science.gov (United States)

    : Public Affairs : Community Relations Community Relations The National Guard Bureau Civic Engagement Report National Commission of the Future of the Army White Papers I am the Guard ARNG Media ARNG Public Public Affairs Executive Support Services Legislative Liaison Special Staff Directorate of Management

  18. Asia-Pacific Journal for Student Affairs (AJSA)

    African Journals Online (AJOL)

    The International Association of Student Affairs and Services (IASAS) serves as a global network of student affairs and services workers that encourages sharing, cooperation, research, exchanges, and attendance at each other's conferences. The Vice President and. General Secretary of IASAS attended the 2016 Asia ...

  19. Underlying Paradigms in Student Affairs Research and Practice

    Science.gov (United States)

    Guido, Florence M.; Chavez, Alicia Fedelina; Lincoln, Yvonna S.

    2010-01-01

    Student affairs professionals benefit from understanding paradigms, worldviews, and ways of being among diverse faculty, staff, and students. It is challenging to understand core differences of paradigms, design student affairs practice and research in congruence with or across specific philosophies, and work effectively with individuals operating…

  20. Global Summit on Student Affairs and Services: Prof. Adam Habib's ...

    African Journals Online (AJOL)

    2016-11-01

    Nov 1, 2016 ... He was a keynote speaker at the 2016 Global Summit on Student Affairs and Services held from 27–28 October ... and Services, with 50 student affairs leaders in attendance. To survive the 21st century, .... While Habib knew there was tax avoidance, if increased taxes resulted in a 20% contraction in gross ...

  1. The Organizational Realities of Student Affairs: A Political Perspective

    Science.gov (United States)

    Shinn, Jeremiah B.

    2015-01-01

    The purpose of this study was to understand the organizational functions of student-affairs at Indiana University and to understand the nature of the conflict between student-affairs and the larger organization. This study utilized the case-study research design. Much of the data collected and analyzed during this case study were of a historical…

  2. 40 CFR 1.37 - Office of External Affairs.

    Science.gov (United States)

    2010-07-01

    ... program direction and professional review of the performance of public affairs functions in the Regional... result in contracts in the area of public information and community relations. It develops proposals and... Administrator for External Affairs and supervises all the functions of the Office. The Director acts as national...

  3. Helping Competencies of Student Affairs Professionals: A Delphi Study

    Science.gov (United States)

    Reynolds, Amy L.

    2011-01-01

    The purpose of this study was to gather student affairs professionals' perceptions of the knowledge and skills needed to effectively help students. Using the Delphi method, 159 entry-level and mid-level student affairs administrators from institutions across the United States were surveyed regarding their perceptions of the helping skills they use…

  4. College Student Concerns: Perceptions of Student Affairs Practitioners

    Science.gov (United States)

    Reynolds, Amy L.

    2013-01-01

    The purpose of this study was to increase awareness of the perceptions of student affairs professionals regarding the most frequent and challenging concerns facing college students today. Using the Delphi method, 159 entry-level and mid-level student affairs administrators from institutions across the country were surveyed about their perceptions…

  5. 10 CFR 1.28 - Office of Public Affairs.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 1 2010-01-01 2010-01-01 false Office of Public Affairs. 1.28 Section 1.28 Energy NUCLEAR... Office of Public Affairs. The Office of Public Affairs— (a) Develops policies, programs, and procedures for the Chairman's approval for informing the public of NRC activities; (b) Prepares, clears, and...

  6. Efficacy of Orientation for New Student Affairs Professionals

    Science.gov (United States)

    Dean, Laura A.; Saunders, Sue A.; Thompson, George F.; Cooper, Dianne L.

    2011-01-01

    New staff orientation is a strategy that can positively affect job satisfaction and productivity, especially for those beginning careers in student affairs. In this study, new student affairs professionals were surveyed to determine their perceptions about the content and efficacy of their orientation experiences. Despite literature encouraging…

  7. THE SOCIAL AFFAIRS ARE THERE FOR YOU!

    CERN Multimedia

    2002-01-01

    We would like to remind you that the Social Affairs Service is a centre offering advice and support that can provide the following: Information and documentation (education for your children, language courses, child-minding facilities, health-related matters etc.). Information on social protection (illness, disability, handicap, retirement, death, etc.) and integration. Assistance in dealings with the authorities/services concerned. Consultations with a view to resolving problems of a personal, family or professional nature, such as problems of dependency (alcohol, drugs, relationship) or behavioural problems (stress, depression, eating disorders)... Support in facing new situations (maternity, divorce, bereavement, change of post, geographical isolation). Assistance with decision making relating to family, personal or professional matters. The team is at the disposal of all members of personnel, whatever their status, as well as to members of their family. Interviews with this service are CONFIDENTI...

  8. Polarized targets and beams

    International Nuclear Information System (INIS)

    Meyer, W.

    1985-01-01

    First the experimental situation of the single-pion photoproduction and the photodisintegration of the deuteron is briefly discussed. Then a description of the Bonn polarization facilities is given. The point of main effort is put on the polarized target which plays a vital role in the program. A facility for photon induced double polarization experiments at ELSA will be presented in section 4. Properties of a tensor polarized deuteron target are discussed in section 5. The development in the field of polarized targets, especially on new target materials, enables a new generation of polarized target experiments with (polarized) electrons. Some comments on the use of a polarized target in combination with electron beams will be discussed in section 6. Electron deuteron scattering from a tensor polarized deuteron target is considered and compared with other experimental possibilities. (orig./HSI)

  9. Redefining Student Affairs through Digital Technology: A Ten-Year Historiography of Digital Technology Use by Student Affairs Administrators

    Science.gov (United States)

    Cabellon, Edmund T.

    2016-01-01

    The student affairs profession is at a crossroads (Torres & Walbert, 2010) given digital technology's growth and the academy's administrative expansion (Bowen, 2013). Student affairs administrators must simultaneously respond to digital technology's implications in students' lives (Kirschner & Karpinski, 2010) and to new state and federal…

  10. 75 FR 65507 - U.S.-Russia Polar Bear Commission Adopts an Annual Taking Limit for the Alaska-Chukotka Polar...

    Science.gov (United States)

    2010-10-25

    ...-FY10] U.S.-Russia Polar Bear Commission Adopts an Annual Taking Limit for the Alaska-Chukotka Polar..., by unanimous vote, the U.S.-Russia Polar Bear Commission established by the ``Agreement Between the... and Management of the Alaska-Chukotka Polar Bear Population,'' signed at Washington, DC, on October 16...

  11. Scattering with polarized neutrons

    International Nuclear Information System (INIS)

    Schweizer, J.

    2007-01-01

    In the history of neutron scattering, it was shown very soon that the use of polarized neutron beams brings much more information than usual scattering with unpolarized neutrons. We shall develop here the different scattering methods that imply polarized neutrons: 1) polarized beams without polarization analysis, the flipping ratio method; 2) polarized beams with a uniaxial polarization analysis; 3) polarized beams with a spherical polarization analysis. For all these scattering methods, we shall give examples of the physical problems which can been solved by these methods, particularly in the field of magnetism: investigation of complex magnetic structures, investigation of spin or magnetization densities in metals, insulators and molecular compounds, separation of magnetic and nuclear scattering, investigation of magnetic properties of liquids and amorphous materials and even, for non magnetic material, separation between coherent and incoherent scattering. (author)

  12. Polarized Light Corridor Demonstrations.

    Science.gov (United States)

    Davies, G. R.

    1990-01-01

    Eleven demonstrations of light polarization are presented. Each includes a brief description of the apparatus and the effect demonstrated. Illustrated are strain patterns, reflection, scattering, the Faraday Effect, interference, double refraction, the polarizing microscope, and optical activity. (CW)

  13. Techniques in polarization physics

    International Nuclear Information System (INIS)

    Clausnitzer, G.

    1974-01-01

    A review of the current status of the technical tools necessary to perform different kinds of polarization experiments is presented, and the absolute and relative accuracy with which data can be obtained is discussed. A description of polarized targets and sources of polarized fast neutrons is included. Applications of polarization techniques to other fields is mentioned briefly. (14 figures, 3 tables, 110 references) (U.S.)

  14. Polarized Moessbauer transitions

    International Nuclear Information System (INIS)

    Barb, D.

    1975-01-01

    Theoretical aspects of the emission, absorption and scattering of polarized gamma rays are reviewed for a general case of combined magnetic and electric hyperfine interactions; various possibilities of obtaining polarized gamma sources are described and examples are given of the applications of Moessbauer spectroscopy with polarized gamma rays in solving problems of solid state physics. (A.K.)

  15. Geographical Income Polarization

    DEFF Research Database (Denmark)

    Azhar, Hussain; Jonassen, Anders Bruun

    inter municipal income inequality. Counter factual simulations show that rising property prices to a large part explain the rise in polarization. One side-effect of polarization is tendencies towards a parallel polarization of residence location patterns, where low skilled individuals tend to live...

  16. Calculation of polarization effects

    International Nuclear Information System (INIS)

    Chao, A.W.

    1983-09-01

    Basically there are two areas of accelerator applications that involve beam polarization. One is the acceleration of a polarized beam (most likely a proton beam) in a synchrotron. Another concerns polarized beams in an electron storage ring. In both areas, numerical techniques have been very useful

  17. Acceleration of polarized particles

    International Nuclear Information System (INIS)

    Buon, J.

    1992-05-01

    The spin kinetics of polarized beams in circular accelerators is reviewed in the case of spin-1/2 particles (electrons and protons) with emphasis on the depolarization phenomena. The acceleration of polarized proton beams in synchrotrons is described together with the cures applied to reduce depolarization, including the use of 'Siberian Snakes'. The in-situ polarization of electrons in storage rings due to synchrotron radiation is studied as well as depolarization in presence of ring imperfections. The applications of electron polarization to accurately calibrate the rings in energy and to use polarized beams in colliding-beam experiments are reviewed. (author) 76 refs., 19 figs., 1 tab

  18. Government in energy affairs - perspectives and alternatives

    International Nuclear Information System (INIS)

    Neethling, D.C.

    1986-01-01

    The present role of the South African Government in energy policy formulation and implementation is assessed in the light of its possible future evolvement, particularly with reference to the tabling of a White Paper on Energy policy during 1986. The brief of the Ministry of Mineral and Energy Affairs is firstly assessed with particular reference to the energy-related functions of the Department itself and those of the various parastatal and statutory organisations and institutions. The various executive and regulatory functions which circumscribe the involvement of government in energy procurement, production and distribution, are critically reviewed in the light of possible further deregulation and the establishment of a more market-orientated energy economy in South Africa. Secondly, the administrative and consultative mechanisms are identified which are believed to be appropriate for the successful co-ordination of the energy-related interests of government and the private sector. It is argued that history has shown that energy policy decisions in South Africa have essentially been guided by non-energy priorities, in particular geopolitical and strategic considerations. It is foreseen that although this situation will prevail to a greater or lesser degree depending on the measure of energy self-sufficiency which will be achieved, particularly insofar as import-dependency of crude oil is concerned, that the emphasis would, indeed should, shift to national energy priorities and considerations. 12 refs., 2 figs

  19. Restructuring the Foreign Affairs Agencies for the Twenty First Century

    National Research Council Canada - National Science Library

    Smythe, Ana

    2000-01-01

    This paper underscores the critical need for cultural change and professional development in the Foreign Affairs Agencies of the United States in order to meet the challenge of a dynamically changed...

  20. Advocating for Standards in Student Affairs Departments in African ...

    African Journals Online (AJOL)

    The Student Affairs Departments have seen immense growth over the years, from a discourse which had no academic relevance in higher education, to that which ... the continent's transformation agenda towards socio-economic development.

  1. ​Senior Public Affairs Advisor | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    ... the excellence in the management of public affairs and meet business needs. ... Portfolio Management - Communications Planning and Implementation ... and Policy & Evaluation Division staff, provides strategic intelligence, advice and ...

  2. East Europe Report, Political, Sociological and Military Affairs, No. 2161

    Science.gov (United States)

    1983-07-06

    Military Affairs Chemistry Cybernetics, Computers and Automation Technology Earth Sciences Electronics and Electrical Engineering Engineering and...language "from which classical Latin developed."^ An army journal undertook the task to explain the etymological origin of the designation Walach

  3. FKBP immunophilins and Alzheimer's disease: A chaperoned affair

    Indian Academy of Sciences (India)

    2011-07-08

    Jul 8, 2011 ... FKBP immunophilins and Alzheimer's disease: A chaperoned affair. Weihuan Cao Mary ... Keywords. Alzheimer's disease; amyloid precursor protein; beta amyloid; FKBP; FK506; immunophilins; tau ... 43 | Issue 1. March 2018.

  4. Towards a professionalisation of student affairs in Africa

    African Journals Online (AJOL)

    personal growth and maturation, both cognitively and emotionally. ... Scholarly and professional developments in African student affairs ... professionals, as well as institutional researchers, academics and students focused on the ... education, as two functional areas which respectively hold opportunities for adaptation and.

  5. Professional Mentoring in Student Affairs: Evaluation of a Global ...

    African Journals Online (AJOL)

    mentoring, professional development, student affairs, global programme, ... multinational research report was released in 2014 profiling the educational ... associations play in providing those essential contacts and peer learning opportunities. ... admissions, academic success, student advising and career services to new ...

  6. Taking Advantage of Student Engagement Results in Student Affairs

    Science.gov (United States)

    Kinzie, Jillian; Hurtado, Sarah S.

    2017-01-01

    This chapter urges student affairs professionals committed to enhancing student success through data-informed decision making to take full advantage of opportunities to apply and use student engagement results.

  7. Professional mentoring in student affairs: evaluation of a global ...

    African Journals Online (AJOL)

    IASAS) offered a global professional mentoring programme that would link student affairs leaders internationally with new graduates and early career professionals in student services. Protégé participants were primarily new graduates of ...

  8. TTI Phase 2 Institutional Support: Public Affairs Centre | IDRC ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    This funding will enhance the Public Affairs Centre's (PAC) role as a credible ... and networks with national governments and international partners working on ... Birth registration is the basis for advancing gender equality and children's rights.

  9. Center for Homeland Defense and Security Homeland Security Affairs Journal

    OpenAIRE

    2015-01-01

    Homeland Security Affairs is the peer-reviewed online journal of the Center for Homeland Defense and Security (CHDS). The journal provides a forum to propose and debate strategies, policies and organizational arrangements to strengthen U.S. homeland security.

  10. Public Affairs Capacity Building: A Soft Tool for Combatant Commanders

    National Research Council Canada - National Science Library

    Salata, Jason P

    2008-01-01

    Public affairs capacity building is a valuable soft component of the Combatant Commander's Theater Campaign Plan that builds habitual relationships, fosters transparency, and enhances the ability to shape the AOR...

  11. extramarital affair as correlate of reproductive health and home

    African Journals Online (AJOL)

    Mugumbate

    health and home instability among couples in Ibadan, Nigeria. Descriptive survey ... importance of reproductive health education and home stability to health and general ..... extramarital affair in Nepal due to economic factors such as foreign ...

  12. Polarization effects. Volume 2

    Energy Technology Data Exchange (ETDEWEB)

    Courant, E.

    1981-01-01

    The use of polarized proton beams in ISABELLE is important for several general reasons: (1) With a single longitudinally polarized proton beam, effects involving parity violation can be identified and hence processes involving weak interactions can be separated from those involving strong and electromagnetic interactions. (2) Spin effects are important in the strong interactions and can be useful for testing QCD. The technique for obtaining polarized proton beams in ISABELLE appears promising, particularly in view of the present development of a polarized proton beam for the AGS. Projections for the luminosity in ISABELLE for collisions of polarized protons - one or both beams polarized with longitudinal or transverse polarization - range from 1/100 to 1 times the luminosity for unpolarized protons.

  13. The Physics of Polarization

    Science.gov (United States)

    Landi Degl'Innocenti, Egidio

    2015-10-01

    The introductory lecture that has been delivered at this Symposium is a condensed version of an extended course held by the author at the XII Canary Island Winter School from November 13 to November 21, 2000. The full series of lectures can be found in Landi Degl'Innocenti (2002). The original reference is organized in 20 Sections that are here itemized: 1. Introduction, 2. Description of polarized radiation, 3. Polarization and optical devices: Jones calculus and Muller matrices, 4. The Fresnel equations, 5. Dichroism and anomalous dispersion, 6. Polarization in everyday life, 7. Polarization due to radiating charges, 8. The linear antenna, 9. Thomson scattering, 10. Rayleigh scattering, 11. A digression on Mie scattering, 12. Bremsstrahlung radiation, 13. Cyclotron radiation, 14. Synchrotron radiation, 15. Polarization in spectral lines, 16. Density matrix and atomic polarization, 17. Radiative transfer and statistical equilibrium equations, 18. The amplification condition in polarized radiative transfer, and 19. Coupling radiative transfer and statistical equilibrium equations.

  14. Mission-Driven Collaboration between Academic and Student Affairs in Community Colleges

    Science.gov (United States)

    Gulley, Needham Yancey

    2017-01-01

    The purpose of this study was to understand the nature of collaboration between academic affairs and student affairs units in the community college context from a basic interpretivist qualitative perspective. The aim was to examine the experiences, influences, and perceptions of mid-level and chief student affairs and academic affairs officers…

  15. 76 FR 43337 - Order of Succession for the Office of Public Affairs

    Science.gov (United States)

    2011-07-20

    ... Office of Public Affairs AGENCY: Office of Public Affairs, HUD. ACTION: Notice of order of succession... Office of Public Affairs. This Order of Succession supersedes all prior orders of succession for the Office of Public Affairs. DATES: Effective Date: June 29, 2011. FOR FURTHER INFORMATION CONTACT: Neill...

  16. 76 FR 8402 - Public Availability of the Department of Veterans Affairs FY 2010 Service Contract Inventory

    Science.gov (United States)

    2011-02-14

    ... DEPARTMENT OF VETERANS AFFAIRS Public Availability of the Department of Veterans Affairs FY 2010 Service Contract Inventory AGENCY: Department of Veterans Affairs. ACTION: Notice of public availability... Consolidated Appropriations Act of 2010 (Pub. L. 111-117), Department of Veterans Affairs (VA) is publishing...

  17. Friends with Benefits: Optimizing Civil Affairs for Future Engagements

    Science.gov (United States)

    2014-06-01

    11 Coles and Weinberg, Civil Affairs: Soldiers Become Governors, 10. 12 Ibid., 12. 13 Charles S. Hyneman, “The...Government, 1775–1991, 329. 35 Ibid., 334. 36 C. Darwin Stolzenbach and Henry A. Kissinger, Civil Affairs in Korea 1950–1951 (Chevy Chase, MD: Johns...DC: U.S. Government Printing Office, 2010), 2. 58 Charles Key, “Petraeus, Crocker Criticize Iran, Call for Halt to Troop Pullout,” CNN, April 8

  18. Workshop on polarized neutron filters and polarized pulsed neutron experiments

    International Nuclear Information System (INIS)

    Itoh, Shinichi

    2004-07-01

    The workshop was held in KEK by thirty-three participants on April 26, 2004. The polarized neutron filter method was only discussed. It consists of three parts; the first part was discussed on the polarized neutron methods, the second part on the polarized neutron experiments and the third on the pulse neutron spectrometer and polarized neutron experiments. The six papers were presented such as the polarized 3 He neutron spin filter, neutron polarization by proton polarized filter, soft master and neutron scattering, polarized neutron in solid physics, polarization experiments by chopper spectroscope and neutron polarization system in superHRPD. (S.Y.)

  19. USSR Report, Political and Sociological Affairs

    National Research Council Canada - National Science Library

    1984-01-01

    Partial Contents: International, Maternity Leaves, Costs, Trade Workers, Labor, Population problems, International Seminar, War Crimes, Radio Broadcast, Milk Production, Scientific Programs, History, Socialisms...

  20. Instrumentation with polarized neutrons

    International Nuclear Information System (INIS)

    Boeni, P.; Muenzer, W.; Ostermann, A.

    2009-01-01

    Neutron scattering with polarization analysis is an indispensable tool for the investigation of novel materials exhibiting electronic, magnetic, and orbital degrees of freedom. In addition, polarized neutrons are necessary for neutron spin precession techniques that path the way to obtain extremely high resolution in space and time. Last but not least, polarized neutrons are being used for fundamental studies as well as very recently for neutron imaging. Many years ago, neutron beam lines were simply adapted for polarized beam applications by adding polarizing elements leading usually to unacceptable losses in neutron intensity. Recently, an increasing number of beam lines are designed such that an optimum use of polarized neutrons is facilitated. In addition, marked progress has been obtained in the technology of 3 He polarizers and the reflectivity of large-m supermirrors. Therefore, if properly designed, only factors of approximately 2-3 in neutron intensity are lost. It is shown that S-benders provide neutron beams with an almost wavelength independent polarization. Using twin cavities, polarized beams with a homogeneous phase space and P>0.99 can be produced without significantly sacrificing intensity. It is argued that elliptic guides, which are coated with large m polarizing supermirrors, provide the highest flux.

  1. Policy Implementation of Government Affairs Devolution Scope of the Ministry of Home Affairs

    Directory of Open Access Journals (Sweden)

    Abdul Halik

    2015-06-01

    Full Text Available Deconcentration policies held because not all authority/government affairs can be done by using the principle of decentralization. The intent of this policy is to synergize the central and local relations. However, in reality not all of the activities of these policies can produce output in accordance with the plans and policy objectives, including those carried out by the Ministry of the Interior. Such conditions occur because of the policy implementation process has not been going well. This study uses naturalistic methods or qualitative descriptive explanation. The purpose of this study is to investigate the process of policy implementation, identify the factors that influence, as well as the results of policy implementation devolution of government affairs deconcentration scope of the Ministry of the Interior in the province of West Java. The results of this study indicate that in general the result of the implementation of deconcentration policy in West Java province is relatively accordance with the objectives of the implementation of deconcentration policy. Similarly, the output of the implementation of deconcentration program targets as predetermined. Nevertheless, there are still many shortcomings in the implementation process.

  2. Enduring Partner Capacity: African Civil Affairs

    Science.gov (United States)

    2012-05-17

    a homogeneous population, which is moderately educated. In terms of religion, Morocco is 99% Sunni Islam and ethnically is 99% Arab Berber . Although...Islamic roots and Berber ethnicity could create trusted relationships among its armed forces and the populations in its region of North Africa

  3. Multiphoton polarization Bremsstrahlung effect

    International Nuclear Information System (INIS)

    Golovinskij, P.A.

    2001-01-01

    A general approach to induced polarization effects was formulated on the basis of theory of many particles in a strong periodic field. Correlation with the perturbation theory is shown and the types of effective polarization potentials both for isolated atoms and ions, and for ions in plasma, are provided. State of art in the theory of forced polarization Bremsstrahlung effect is analyzed and some outlooks for further experimental and theoretical studies are outlined [ru

  4. Airborne Laser Polarization Sensor

    Science.gov (United States)

    Kalshoven, James, Jr.; Dabney, Philip

    1991-01-01

    Instrument measures polarization characteristics of Earth at three wavelengths. Airborne Laser Polarization Sensor (ALPS) measures optical polarization characteristics of land surface. Designed to be flown at altitudes of approximately 300 m to minimize any polarizing or depolarizing effects of intervening atmosphere and to look along nadir to minimize any effects depending on look angle. Data from measurements used in conjunction with data from ground surveys and aircraft-mounted video recorders to refine mathematical models used in interpretation of higher-altitude polarimetric measurements of reflected sunlight.

  5. Polarization of Be stars

    International Nuclear Information System (INIS)

    Johns, M.W.

    1975-01-01

    Linear polarization of starlight may be produced by electron scattering in the extended atmospheres of early type stars. Techniques are investigated for the measurement and interpretation of this polarization. Polarimetric observations were made of twelve visual double star systems in which at least one member was a B type star as a means of separating the intrinsic stellar polarization from the polarization produced in the interstellar medium. Four of the double stars contained a Be star. Evidence for intrinsic polarization was found in five systems including two of the Be systems, one double star with a short period eclipsing binary, and two systems containing only normal early type stars for which emission lines have not been previously reported. The interpretation of these observations in terms of individual stellar polarizations and their wavelength dependence is discussed. The theoretical basis for the intrinsic polarization of early type stars is explored with a model for the disk-like extended atmospheres of Be stars. Details of a polarimeter for the measurement of the linear polarization of astronomical point sources are also presented with narrow band (Δ lambda = 100A) measurements of the polarization of γ Cas from lambda 4000 to lambda 5800

  6. Polarization at SLC

    International Nuclear Information System (INIS)

    Swartz, M.L.

    1988-07-01

    The SLAC Linear Collider has been designed to readily accommodate polarized electron beams. Considerable effort has been made to implement a polarized source, a spin rotation system, and a system to monitor the beam polarization. Nearly all major components have been fabricated. At the current time, several source and polarimeter components have been installed. The installation and commissioning of the entire system will take place during available machine shutdown periods as the commissioning of SLC progresses. It is expected that a beam polarization of 45% will be achieved with no loss in luminosity. 13 refs., 15 figs

  7. TRANSVERSELY POLARIZED Λ PRODUCTION

    International Nuclear Information System (INIS)

    BORER, D.

    2000-01-01

    Transversely polarized Λ production in hard scattering processes is discussed in terms of a leading twist T-odd fragmentation function which describes the fragmentation of an unpolarized quark into a transversely polarized Λ. We focus on the properties of this function and its relevance for the RHIC and HERMES experiments

  8. Our Polar Past

    Science.gov (United States)

    Clary, Renee; Wandersee, James

    2009-01-01

    The study of polar exploration is fascinating and offers students insights into the history, culture, and politics that affect the developing sciences at the farthest ends of Earth. Therefore, the authors think there is value in incorporating polar exploration accounts within modern science classrooms, and so they conducted research to test their…

  9. Marine polar steroids

    International Nuclear Information System (INIS)

    Stonik, Valentin A

    2001-01-01

    Structures, taxonomic distribution and biological activities of polar steroids isolated from various marine organisms over the last 8-10 years are considered. The peculiarities of steroid biogenesis in the marine biota and their possible biological functions are discussed. Syntheses of some highly active marine polar steroids are described. The bibliography includes 254 references.

  10. Polarized proton beams

    International Nuclear Information System (INIS)

    Roser, T.

    1995-01-01

    The acceleration of polarized proton beams in circular accelerators is complicated by the presence of numerous depolarizing spin resonances. Careful and tedious minimization of polarization loss at each of these resonances allowed acceleration of polarized proton beams up to 22 GeV. It has been the hope that Siberian Snakes, which are local spin rotators inserted into ring accelerators, would eliminate these resonances and allow acceleration of polarized beams with the same ease and efficiency that is now routine for unpolarized beams. First tests at IUCF with a full Siberian Snake showed that the spin dynamics with a Snake can be understood in detail. The author now has results of the first tests of a partial Siberian Snake at the AGS, accelerating polarized protons to an energy of about 25 GeV. These successful tests of storage and acceleration of polarized proton beams open up new possibilities such as stored polarized beams for internal target experiments and high energy polarized proton colliders

  11. Polarization Optics in Telecommunications

    CERN Document Server

    Damask, Jay N

    2005-01-01

    The strong investments into optical telecommunications in the late 1990s resulted in a wealth of new research, techniques, component designs, and understanding of polarization effects in fiber. Polarization Optics in Telecommunications brings together recent advances in the field to create a standard, practical reference for component designers and optical fiber communication engineers. Beginning with a sound foundation in electromagnetism, the author offers a dissertation of the spin-vector formalism of polarization and the interaction of light with media. Applications discussed include optical isolators, optical circulators, fiber collimators, and a variety of applied waveplate and prism combinations. Also included in an extended discussion of polarization-mode dispersion (PMD) and polarization-dependent loss (PDL), their representation, behavior, statistical properties, and measurement. This book draws extensively from the technical and patent literature and is an up-to-date reference for researchers and c...

  12. Parallel Polarization State Generation.

    Science.gov (United States)

    She, Alan; Capasso, Federico

    2016-05-17

    The control of polarization, an essential property of light, is of wide scientific and technological interest. The general problem of generating arbitrary time-varying states of polarization (SOP) has always been mathematically formulated by a series of linear transformations, i.e. a product of matrices, imposing a serial architecture. Here we show a parallel architecture described by a sum of matrices. The theory is experimentally demonstrated by modulating spatially-separated polarization components of a laser using a digital micromirror device that are subsequently beam combined. This method greatly expands the parameter space for engineering devices that control polarization. Consequently, performance characteristics, such as speed, stability, and spectral range, are entirely dictated by the technologies of optical intensity modulation, including absorption, reflection, emission, and scattering. This opens up important prospects for polarization state generation (PSG) with unique performance characteristics with applications in spectroscopic ellipsometry, spectropolarimetry, communications, imaging, and security.

  13. Constraining Polarized Foregrounds for EoR Experiments. II. Polarization Leakage Simulations in the Avoidance Scheme

    Energy Technology Data Exchange (ETDEWEB)

    Nunhokee, C. D.; Bernardi, G.; Foster, G.; Grobler, T. L. [Department of Physics and Electronics, Rhodes University, P.O. Box 94, Grahamstown, 6140 (South Africa); Kohn, S. A.; Aguirre, J. E.; Martinot, J. Z. E. [Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA (United States); Thyagarajan, N. [Arizona State University, School of Earth and Space Exploration, Tempe, AZ 85287 (United States); Dillon, J. S. [Berkeley Center for Cosmological Physics, Berkeley, CA 94720 (United States); Parsons, A. R., E-mail: cnunhokee@gmail.com [Dept. of Astronomy, University of California, Berkeley, CA 94720 (United States)

    2017-10-10

    A critical challenge in the observation of the redshifted 21 cm line is its separation from bright Galactic and extragalactic foregrounds. In particular, the instrumental leakage of polarized foregrounds, which undergo significant Faraday rotation as they propagate through the interstellar medium, may harmfully contaminate the 21 cm power spectrum. We develop a formalism to describe the leakage due to instrumental widefield effects in visibility-based power spectra measured with redundant arrays, extending the delay-spectrum approach presented in Parsons et al. We construct polarized sky models and propagate them through the instrument model to simulate realistic full-sky observations with the Precision Array to Probe the Epoch of Reionization. We find that the leakage due to a population of polarized point sources is expected to be higher than diffuse Galactic polarization at any k mode for a 30 m reference baseline. For the same reference baseline, a foreground-free window at k > 0.3 h Mpc{sup −1} can be defined in terms of leakage from diffuse Galactic polarization even under the most pessimistic assumptions. If measurements of polarized foreground power spectra or a model of polarized foregrounds are given, our method is able to predict the polarization leakage in actual 21 cm observations, potentially enabling its statistical subtraction from the measured 21 cm power spectrum.

  14. JPRS Report, Soviet Union, Political Affairs

    Science.gov (United States)

    1988-10-26

    and to enhance substantively the role of the republic’s manage- rial entities in satisfying the population’s demand for alimentary products, it is...designing, biotechnology and others. On the other hand, to the extent that the principles of cost accounting and self financing are more and more widely

  15. JPRS Report, Soviet Union, International Affairs.

    Science.gov (United States)

    1987-09-09

    technical progress and the middle levels of the population, especially young people who fill the ranks of the unemployed in considerable numbers, an...but also a special optical psychic instrument, with the help of which it might be possible to recarve the events along a scenario prepared in advance

  16. Polarized atomic beams for targets

    International Nuclear Information System (INIS)

    Grueebler, W.

    1984-01-01

    The basic principle of the production of polarized atomic hydrogen and deuterium beams are reviewed. The status of the present available polarization, density and intensity are presented. The improvement of atomic beam density by cooling the hydrogen atoms to low velocity is discussed. The possible use of polarized atomic beams as targets in storage rings is shown. It is proposed that polarized atomic beams can be used to produce polarized gas targets with high polarization and greatly improved density

  17. GUIDE FOR POLARIZED NEUTRONS

    Science.gov (United States)

    Sailor, V.L.; Aichroth, R.W.

    1962-12-01

    The plane of polarization of a beam of polarized neutrons is changed by this invention, and the plane can be flipped back and forth quicitly in two directions in a trouble-free manner. The invention comprises a guide having a plurality of oppositely directed magnets forming a gap for the neutron beam and the gaps are spaced longitudinally in a spiral along the beam at small stepped angles. When it is desired to flip the plane of polarization the magnets are suitably rotated to change the direction of the spiral of the gaps. (AEC)

  18. The representation of neutron polarization

    International Nuclear Information System (INIS)

    Byrne, J.

    1979-01-01

    Neutron beam polarization representation is discussed under the headings; transfer matrices, coherent parity violation for neutrons, neutron spin rotation in helical magnetic fields, polarization and interference. (UK)

  19. Factors Which Influenced the Success of the Implementation of the Regulation of the Minister of Home Affairs Number 59 of 2007 in North Sumatera Provincial Government

    Directory of Open Access Journals (Sweden)

    Amar Rinanda Lubis

    2016-06-01

    Full Text Available This study aimed to test empirically and analyze the influence of regulation, commitment, human resources and supporting devices to the successful implementation of the Regulation of the Minister of Home Affairs No.59 Year 2007. Population in this study is SKPD Officer of North Sumatra Province (108 people which was sampled for 93 people. Simultaneous F test and partial t test were used to studies effects of regulation, commitment, human resources and supporting facilities to the successful implementation of the Regulation of the Minister of Home Affairs No. 59, year 2007. These results prove that the regulation, commitment, human resources and supporting devices simultaneously influenced the successful implementation of the Regulation of the Minister of Home Affairs No. 59 Year 2007. In partial, regulation, commitment and human resources affected successful implementation of the Regulation of the Minister of Home Affairs No. 59 Year 2007, while the supporting facilities did not have an effect. These results showed that 48% variations of successful implementation of the Regulation of the Minister of Home Affairs No.59 Year 2007, depended on variable of regulation, commitment, human resources and supporting facilities and the remaining 52% depended on other uninvestigated variables.

  20. Civilian Health and Medical Program of the Department of Veterans Affairs (CHAMPVA)

    Data.gov (United States)

    Department of Veterans Affairs — Civilian Health and Medical Program of the Department of Veterans Affairs (CHAMPVA) is a health care benefit program designed for the dependents of certain Veterans....

  1. 75 FR 52582 - Bureau of Educational and Cultural Affairs Request for Grant Proposals: Global Undergraduate...

    Science.gov (United States)

    2010-08-26

    ... DEPARTMENT OF STATE [Public Notice 7131] Bureau of Educational and Cultural Affairs Request for... Academic Exchange Programs of the Bureau of Educational and Cultural Affairs announces an open competition... science, criminal justice, economics, education, engineering, environmental management, geology...

  2. 78 FR 77200 - Requested Administrative Waiver of the Coastwise Trade Laws: Vessel AFFAIR; Invitation for Public...

    Science.gov (United States)

    2013-12-20

    ... DEPARTMENT OF TRANSPORTATION Maritime Administration [Docket No. MARAD-2013-0151] Requested Administrative Waiver of the Coastwise Trade Laws: Vessel AFFAIR; Invitation for Public Comments AGENCY: Maritime... AFFAIR is: Intended Commercial Use of Vessel: ``Charter Fishing (sport) & sightseeing tours.'' Geographic...

  3. Museum security and the Thomas Crown Affair.

    Energy Technology Data Exchange (ETDEWEB)

    Michaud, E. C. (Nuclear Engineering Division)

    2010-01-01

    Over the years, I've daydreamed about stealing a Vermeer, a Picasso, or Rembrandt. It tickles me, as much as watching the reboot of The Thomas Crown Affair. Why is it, do you suppose, so much fun to think about stealing a world renowned piece off the wall of a major metropolitan museum? Is it the romantic thoughts of getting away with it, walking past infrared detectors, and pressure sensors ala Indiana Jones with the sack of sand to remove the idol without triggering the security system? Is it the idea of snatching items with such fantastic prices, where the romance of possessing an item of such value is less intoxicating than selling it to a private collector for it to never be seen again? I suspect others share my daydreams as they watch theater or hear of a brazen daylight heist at museums around the world, or from private collections. Though when reality sets in, the mind of the security professional kicks in. How could one do it, why would one do it, what should you do once it's done? The main issue a thief confronts when acquiring unique goods is how to process or fence them. They become very difficult to sell because they are one-of-a-kind, easy to identify, and could lead to the people involved with the theft. The whole issue of museum security takes up an ironic twist when one considers the secretive British street artist 'Banksy'. Banksy has made a name for himself by brazenly putting up interesting pieces of art in broad daylight (though many critics don't consider his work to be art) on building walls, rooftops, or even museums. I bring him up for a interesting take on what may become a trend in museum security. In March of 2005, Banksy snuck a piece of his called 'Vandalized Oil Painting' into the Brooklyn Museum's Great Historical Painting Wing, plus 3 other pieces into major museums in New York. Within several days, 2 paintings had been torn down, but 2 stayed up much longer. In his home country of the UK, a

  4. Interferometric polarization control

    International Nuclear Information System (INIS)

    Chuss, David T.; Wollack, Edward J.; Moseley, S. Harvey; Novak, Giles

    2006-01-01

    We develop the Jones and Mueller matrices for structures that allow control of the path length difference between two linear orthogonal polarizations and consider the effect of placing multiple devices in series. Specifically, we find that full polarization modulation (measurement of Stokes Q, U, and V) can be achieved by placing two such modulators in series if the relative angles of the beam-splitting grids with respect to the analyzer orientation are appropriately chosen. Such a device has several potential advantages over a spinning wave plate modulator for measuring astronomical polarization in the far infrared through millimeter: (i) The use of small, linear motions eliminates the need for cryogenic rotational bearings; (ii) the phase flexibility allows measurement of circular as well as linear polarization; and (iii) this architecture allows for both multiwavelength and broadband modulation. We also present initial laboratory results

  5. Dynamic nuclear spin polarization

    Energy Technology Data Exchange (ETDEWEB)

    Stuhrmann, H B [GKSS-Forschungszentrum Geesthacht GmbH (Germany)

    1996-11-01

    Polarized neutron scattering from dynamic polarized targets has been applied to various hydrogenous materials at different laboratories. In situ structures of macromolecular components have been determined by nuclear spin contrast variation with an unprecedented precision. The experiments of selective nuclear spin depolarisation not only opened a new dimension to structural studies but also revealed phenomena related to propagation of nuclear spin polarization and the interplay of nuclear polarisation with the electronic spin system. The observation of electron spin label dependent nuclear spin polarisation domains by NMR and polarized neutron scattering opens a way to generalize the method of nuclear spin contrast variation and most importantly it avoids precontrasting by specific deuteration. It also likely might tell us more about the mechanism of dynamic nuclear spin polarisation. (author) 4 figs., refs.

  6. Polarized proton colliders

    International Nuclear Information System (INIS)

    Roser, T.

    1995-01-01

    High energy polarized beam collisions will open up the unique physics opportunities of studying spin effects in hard processes. This will allow the study of the spin structure of the proton and also the verification of the many well documented expectations of spin effects in perturbative QCD and parity violation in W and Z production. Proposals for polarized proton acceleration for several high energy colliders have been developed. A partial Siberian Snake in the AGS has recently been successfully tested and full Siberian Snakes, spin rotators, and polarimeters for RHIC are being developed to make the acceleration of polarized beams to 250 GeV possible. This allows for the unique possibility of colliding two 250 GeV polarized proton beams at luminosities of up to 2 x 10 32 cm -2 s -1

  7. Mental Health a Worry for Student Affairs Worldwide*

    African Journals Online (AJOL)

    Global Summit on Student Affairs and Services. “We are seeing ... universities in China were offering courses, counselling and professional help. ... Botswana, said mental health issues varied, as students had different needs. ... in the job market, and to cope with academics and adjustment to universities and colleges.

  8. Plants and Human Affairs: Educational Enhancement Via a Computer.

    Science.gov (United States)

    Crovello, Theodore J.; Smith, W. Nelson

    To enhance both teaching and learning in an advanced undergraduate elective course on the interrelationships of plants and human affairs, the computer was used for information retrieval, multiple choice course review, and the running of three simulation models--plant related systems (e.g., the rise in world coffee prices after the 1975 freeze in…

  9. Developing and Using Dashboard Indicators in Student Affairs Assessment

    Science.gov (United States)

    Mitchell, Joshua J.; Ryder, Andrew J.

    2013-01-01

    Dashboard systems are increasingly popular as assessment and performance management tools in higher education. This chapter examines the use of dashboards in student affairs, including examples of key indicators and considerations for developing and implementing these tools. The chapter begins with an overview of the origins of dashboards, from…

  10. Learning from Tragedy: Student Affairs Leadership Following College Campus Disasters

    Science.gov (United States)

    Treadwell, Katie L.

    2017-01-01

    The phenomenological study illuminated the lived experience of senior-level student affairs administrators who encountered high-profile crises, such as natural disasters, intentional violence, or accidents. In the midst of unimaginable tragedy, their lived experience was defined by: uncertainty and fear, heightened awareness, personal impact, and…

  11. Student Affairs and Information Technology: Collaborating in the Cloud

    Science.gov (United States)

    Barbatis, Peter Reyes

    2014-01-01

    Student affairs and information technology have opportunities to partner in order to increase student satisfaction and retention rates and to assist institutions to comply with federal educational regulations. This chapter contains four examples of emerging best practices and future initiatives including: (a) the admissions pipeline, (b)…

  12. Asia-Pacific Journal for Student Affairs (AJSA)

    African Journals Online (AJOL)

    Dr Kathleen Callahan is Lecturer for Leadership Studies at Christopher Newport University. Email: ... The International Association of Student Affairs and Services (IASAS) serves as a global network of ... the landscape in higher education. ... This issue also includes understanding the voices of children of Overseas Filipino.

  13. Institutional Support : Institute of Economic Affairs (IEA-Ghana ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    The Institute of Economic Affairs in Ghana (IEA-Ghana) was founded in 1989 during the twilight of the military dictatorship. At that time there were no independent policy centres in the country and hence little public policy dialogue. Still, IEA-Ghana succeeded in creating a platform for debate and made a strong case for major ...

  14. In 1994, the Minister responsible for Environmental Affairs and ...

    African Journals Online (AJOL)

    denise

    Affairs and Tourism launched a process leading to ... To achieve this, the Chief Director of Marine & Coastal Management (MCM), the authority responsible for ... 1 Department of Zoology, University of Cape Town, Rondebosch 7701, South Africa. ... 3 Rural Research and Development Institute, University of Transkei, Private ...

  15. Role conceptions of public affairs practitioners in The Netherlands

    NARCIS (Netherlands)

    von den Driesch, D.; van der Wurff, R.

    2016-01-01

    Public affairs (PA) practitioners play an important role in political decision-making in modern democratic societies. This study gives a first insight in how these practitioners themselves perceive their role. Based on findings from previous empirical studies and normative democratic theories, three

  16. Faculty and Student Affairs Collaboration in the Corporate University

    Science.gov (United States)

    Harrison, Laura M.

    2013-01-01

    Faculty, student affairs professionals, and most importantly, students, are paying the price as institutions of higher education increasingly operate in a top-down manner with an over-emphasis on the bottom line. The corporatization of higher education creates lopsided reward (and punishment) systems for faculty, unreasonably stressful…

  17. Guest Editorial | Frade | Journal of Student Affairs in Africa

    African Journals Online (AJOL)

    Journal of Student Affairs in Africa. Journal Home · ABOUT THIS JOURNAL · Advanced Search · Current Issue · Archives · Journal Home > Vol 5, No 2 (2017) >. Log in or Register to get access to full text downloads. Username, Password, Remember me, or Register. Guest Editorial. Nelia Frade. Abstract. Tutoring and ...

  18. Global Summit on Student Affairs and Services | Moscaritolo ...

    African Journals Online (AJOL)

    Global Summit on Student Affairs and Services. Lisa Bardill Moscaritolo, Karen Davis. Abstract. No Abstract. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors ...

  19. Conseiller principal, Affaires publiques (h/f) | CRDI - Centre de ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Résumé des fonctions Le conseiller principal, Affaires publiques agit à titre de chef des communications pour un portefeuille de clients attribué en vue d'offrir des services de communications intégrés. Plus particulièrement, le conseiller se penche sur les besoins relatifs aux communications, fournit des conseils, assure une ...

  20. Factual states of affairs – uniting diverging philosophical orientations ...

    African Journals Online (AJOL)

    The problem of persistence and change and the state of affairs that change can only be detected on the basis of constancy permeated the history of philosophy and the various academic disciplines, including the discipline of paleontology. The dominant pattern of the paleontological record, namely stasis, poses empirical ...

  1. Addressing Perceived Skill Deficiencies in Student Affairs Graduate Preparation Programs

    Science.gov (United States)

    Cooper, Jay; Mitchell, Donald, Jr.; Eckerle, Kayle; Martin, Kyle

    2016-01-01

    This article explores existing literature on perceived skill deficiencies among entry-level student affairs practitioners. Through a review of recent literature, seven perceived skill deficiencies were identified, including budgeting and financial management, strategic planning, research and assessment, legal knowledge and standards, supervision,…

  2. Arizona Commission of Indian Affairs 1982 Annual Report.

    Science.gov (United States)

    Arizona Commission of Indian Affairs, Phoenix.

    Designed to provide insight into the proceedings, transactions, and findings of the Arizona Commission of Indian Affairs, this 1981-82 annual report reflects the Commission's efforts to improve communications, understanding and working relationships between tribes and state government to provide tribes with technical assistance. The report…

  3. Self-Esteem: A Family Affair. An Evaluation Study.

    Science.gov (United States)

    Bredehoft, David J.

    Over the past decade parent education programs, following either a democratic or behavior modification model, have gained in recognition and support. To investigate the effectiveness of Jean Illsley Clarke's parent education program, Self Esteem: A Family Affair, on self-esteem, conflict resolution, and family togetherness and flexibility, 27…

  4. How Do Science and Technology Affect International Affairs?

    Science.gov (United States)

    Weiss, Charles

    2015-01-01

    Science and technology influence international affairs by many different mechanisms. Both create new issues, risks and uncertainties. Advances in science alert the international community to new issues and risks. New technological capabilities transform war, diplomacy, commerce, intelligence, and investment. This paper identifies six basic…

  5. The Orientation and Development of the Public Affair Management Specialty

    Science.gov (United States)

    Li, Chenghui; Fu, Yongxian; Chen, Rongxiang; Hu, Xueqi

    2010-01-01

    Though the specialty of the public affair management has been developed for ten years, but it is still facing the actuality that the orientation and development are difficult. Only by confirming the cultivation target and the development orientation, the development of the specialty could find the development approach and method. According to the…

  6. The APS Panel on Public Affairs and Federal Science Policy

    Science.gov (United States)

    Jaffe, Robert

    2013-03-01

    The Panel on Public Affairs (POPA) is the organ through which the APS seeks to provide high quality input to the Federal Government on issues with significant physics content, ranging from energy and environment to national security. I will describe POPA's evolving mission, some recent efforts and successes, and look at the agenda for the next few years.

  7. TTI Phase 2 Institutional Support: The Institute of Economic Affairs ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    This funding will help strengthen the Institute of Economic Affairs' ... IEA-Kenya's research areas include social security, trade and competition policies, ... involving other think tanks as a cost-effective, learning-by-doing approach ... the results of its 2017 call for proposals to establish Cyber Policy Centres in the Global South.

  8. Plasma polarization spectroscopy

    International Nuclear Information System (INIS)

    Iwamae, Atsushi; Horimoto, Yasuhiro; Fujimoto, Takashi; Hasegawa, Noboru; Sukegawa, Kouta; Kawachi, Tetsuya

    2005-01-01

    The electron velocity distribution function (EVDF) in plasma can be anisotropic in laser-produced plasmas. We have developed a new technique to evaluate the polarization degree of the emission lines in the extreme vacuum ultra violet wavelength region. The polarization of the emission lines and the continuums from the lithium-like nitrogen and from helium- and hydrogen-like carbon in recombining plasma is evaluated. Particle simulation in the velocity space gives the time scale for relaxation of anisotropic EVDFs. (author)

  9. No More Polarization, Please!

    OpenAIRE

    Reinholt, Mia

    2006-01-01

    The organizational science literature on motivation has for long been polarized into two main positions; the organizational economic position focusing on extrinsic motivation and the organizational behavior position emphasizing intrinsic motivation. With the rise of the knowledge economy and the increasing levels of complexities it entails, such polarization is not fruitful in the attempt to explain motivation of organizational members. This paper claims that a more nuanced perspective on mot...

  10. Inertial polarization of dielectrics

    OpenAIRE

    Zavodovsky, A. G.

    2011-01-01

    It was proved that accelerated motion of a linear dielectric causes its polarization. Accelerated translational motion of a dielectric's plate leads to the positive charge of the surface facing the direction of motion. Metal plates of a capacitor were used to register polarized charges on a dielectric's surface. Potential difference between the capacitor plates is proportional to acceleration, when acceleration is constant potential difference grows with the increase of a dielectric's area, o...

  11. The Polarization of Achernar

    Science.gov (United States)

    McDavid, D.

    2005-11-01

    Recent near-infrared measurements of the angular diameter of Achernar (the bright Be star alpha Eridani) with the ESO VLT interferometer have been interpreted as the detection of an extremely oblate photosphere, with a ratio of equatorial to polar radius of at least 1.56 ± 0.05 and a minor axis orientation of 39° ± 1° (from North to East). The optical linear polarization of this star during an emission phase in 1995 September was 0.12 ± 0.02% at position angle 37° ± 8° (in equatorial coordinates), which is the direction of the projection of the rotation axis on the plane of the sky according to the theory of polarization by electron scattering in an equatorially flattened circumstellar disk. These two independent determinations of the orientation of the rotation axis are therefore in agreement. The observational history of correlations between Hα emission and polarization as found in the literature is that of a typical Be star, with the exception of an interesting question raised by the contrast between Schröder's measurement of a small polarization perpendicular to the projected rotation axis in 1969--70 and Tinbergen's measurement of zero polarization in 1974.5, both at times when emission was reportedly absent.

  12. Fusion of a polarized projectile with a polarized target

    International Nuclear Information System (INIS)

    Christley, J.A.; Johnson, R.C.; Thompson, I.J.

    1995-01-01

    The fusion cross sections for a polarized target with both unpolarized and polarized projectiles are studied. Expressions for the observables are given for the case when both nuclei are polarized. Calculations for fusion of an aligned 165 Ho target with 16 O and polarized 7 Li beams are presented

  13. 48 CFR 852.203-71 - Display of Department of Veterans Affairs hotline poster.

    Science.gov (United States)

    2010-10-01

    ... Veterans Affairs hotline poster. 852.203-71 Section 852.203-71 Federal Acquisition Regulations System... Provisions and Clauses 852.203-71 Display of Department of Veterans Affairs hotline poster. As prescribed in 803.7001, insert the following clause: Display of Department of Veterans Affairs Hotline Poster (DEC...

  14. 16 CFR 1000.20 - Office of Information and Public Affairs.

    Science.gov (United States)

    2010-01-01

    ... 16 Commercial Practices 2 2010-01-01 2010-01-01 false Office of Information and Public Affairs... ORGANIZATION AND FUNCTIONS § 1000.20 Office of Information and Public Affairs. The Office of Information and Public Affairs, which is managed by the Director of the Office, is responsible for the development...

  15. 76 FR 43336 - Delegation of Authority for the Office of Public Affairs

    Science.gov (United States)

    2011-07-20

    ... the Office of Public Affairs AGENCY: Office of the Secretary, HUD. ACTION: Notice of Delegation of... Secretary for Public Affairs with respect to developing policy and procedures for external and internal... Assistant Secretary for Public Affairs. DATES: Effective Date: June 29, 2011. FOR FURTHER INFORMATION...

  16. Stressing the Importance of Public Affairs Knowledge in an Era of Declining Political Interest.

    Science.gov (United States)

    Fife, Brian L.

    Public affairs instructors must routinely contend with the reality that stressing the importance of political knowledge is challenging in an era of declining student interest in politics and political institutions. Yet enhancing students' knowledge about public affairs can stimulate more interest and engagement in public affairs, particularly if…

  17. 49 CFR 1.63 - Delegations to Assistant to the Secretary and Director of Public Affairs.

    Science.gov (United States)

    2010-10-01

    ... Director of Public Affairs. 1.63 Section 1.63 Transportation Office of the Secretary of Transportation... and Director of Public Affairs. The Assistant to the Secretary and Director of Public Affairs is delegated authority to: (a) [Reserved] (b) Monitor the overall public information program and review and...

  18. Polarized Light Microscopy

    Science.gov (United States)

    Frandsen, Athela F.

    2016-01-01

    Polarized light microscopy (PLM) is a technique which employs the use of polarizing filters to obtain substantial optical property information about the material which is being observed. This information can be combined with other microscopy techniques to confirm or elucidate the identity of an unknown material, determine whether a particular contaminant is present (as with asbestos analysis), or to provide important information that can be used to refine a manufacturing or chemical process. PLM was the major microscopy technique in use for identification of materials for nearly a century since its introduction in 1834 by William Fox Talbot, as other techniques such as SEM (Scanning Electron Microscopy), FTIR (Fourier Transform Infrared spectroscopy), XPD (X-ray Powder Diffraction), and TEM (Transmission Electron Microscopy) had not yet been developed. Today, it is still the only technique approved by the Environmental Protection Agency (EPA) for asbestos analysis, and is often the technique first applied for identification of unknown materials. PLM uses different configurations in order to determine different material properties. With each configuration additional clues can be gathered, leading to a conclusion of material identity. With no polarizing filter, the microscope can be used just as a stereo optical microscope, and view qualities such as morphology, size, and number of phases. With a single polarizing filter (single polars), additional properties can be established, such as pleochroism, individual refractive indices, and dispersion staining. With two polarizing filters (crossed polars), even more can be deduced: isotropy vs. anisotropy, extinction angle, birefringence/degree of birefringence, sign of elongation, and anomalous polarization colors, among others. With the use of PLM many of these properties can be determined in a matter of seconds, even for those who are not highly trained. McCrone, a leader in the field of polarized light microscopy, often

  19. 76 FR 81984 - Bureau of International Labor Affairs; Office of Trade and Labor Affairs; Bahrain-United States...

    Science.gov (United States)

    2011-12-29

    ... and Labor Affairs; Bahrain--United States Free Trade Agreement; Notice of Extension of the Period of...) of the Bahrain--United States Free Trade Agreement (FTA). The submission was received on April 21... of Inquiry and the proposal of the Government of Bahrain to the Governing Body of the International...

  20. When measured spin polarization is not spin polarization

    International Nuclear Information System (INIS)

    Dowben, P A; Wu Ning; Binek, Christian

    2011-01-01

    Spin polarization is an unusually ambiguous scientific idiom and, as such, is rarely well defined. A given experimental methodology may allow one to quantify a spin polarization but only in its particular context. As one might expect, these ambiguities sometimes give rise to inappropriate interpretations when comparing the spin polarizations determined through different methods. The spin polarization of CrO 2 and Cr 2 O 3 illustrate some of the complications which hinders comparisons of spin polarization values. (viewpoint)

  1. The evolution of tensor polarization

    International Nuclear Information System (INIS)

    Huang, H.; Lee, S.Y.; Ratner, L.

    1993-01-01

    By using the equation of motion for the vector polarization, the spin transfer matrix for spin tensor polarization, the spin transfer matrix for spin tensor polarization is derived. The evolution equation for the tensor polarization is studied in the presence of an isolate spin resonance and in the presence of a spin rotor, or snake

  2. The polarization of fast neutrons

    International Nuclear Information System (INIS)

    Talov, V.V.

    2000-01-01

    The present work is the review of polarization of fast neutrons and methods of polarization analysis. This also includes information about polarization of fast neutrons from first papers, which described polarization in the D(d,n) 3 He, 7 Li(p,n) 7 Be, and T(p,n) 3 He reactions. (authors)

  3. Polarized particles in storage rings

    International Nuclear Information System (INIS)

    Derbenev, Ya.S.; Kondratenko, A.M.; Serednyakov, S.I.; Skrinskij, A.N.; Tumajkin, G.M.; Shatunov, Yu.M.

    1977-01-01

    Experiments with polarized beams on the VEPP-2M and SPEAK storage rings are described. Possible methods of producing polarized particle beams in storage rings as well as method of polarization monitoring are counted. Considered are the processes of radiation polarization of electrons and positrons. It is shown, that to preserve radiation polarization the introduction of regions with a strong sign-variable magnetic field is recommended. Methods of polarization measurement are counted. It is suggested for high energies to use dependence of synchrotron radiation power on transverse polarization of electrons and positrons. Examples of using polarizability of colliding beams in storage rings are presented

  4. Polarized electrons at Jefferson laboratory

    International Nuclear Information System (INIS)

    Sinclair, C.K.

    1998-01-01

    The CEBAF accelerator at Jefferson laboratory can deliver CW electron beams to three experimental halls simultaneously. A large fraction of the approved scientific program at the lab requires polarized electron beams. Many of these experiments, both polarized and unpolarized, require high average beam current as well. Since all electrons delivered to the experimental halls originate from the same cathode, delivery of polarized beam to a single hall requires using the polarized source to deliver beam to all experiments in simultaneous operation. The polarized source effort at Jefferson Lab is directed at obtaining very long polarized source operational lifetimes at high average current and beam polarization; at developing the capability to deliver all electrons leaving the polarized source to the experimental halls; and at delivering polarized beam to multiple experimental halls simultaneously. Initial operational experience with the polarized source will be presented. copyright 1998 American Institute of Physics

  5. Polarized Electrons at Jefferson Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Sinclair, C.K.

    1997-12-31

    The CEBAF accelerator at Jefferson laboratory can deliver CW electron beams to three experimental halls simultaneously. A large fraction of the approved scientific program at the lab requires polarized electron beams. Many of these experiments, both polarized and unpolarized, require high average beam current as well. Since all electrons delivered to the experimental halls originate from the same cathode, delivery of polarized beam to a single hall requires using the polarized source to deliver beam to all experiments in simultaneous operation. The polarized source effort at Jefferson Lab is directed at obtaining very long polarized source operational lifetimes at high average current and beam polarization; at developing the capability to deliver all electrons leaving the polarized source to the experimental halls; and at delivering polarized beam to multiple experimental halls simultaneously.initial operational experience with the polarized source will be presented.

  6. Polarization: A Must for Fusion

    Directory of Open Access Journals (Sweden)

    Guidal M.

    2012-10-01

    Full Text Available Recent realistic simulations confirm that the polarization of the fuel would improve significantly the DT fusion efficiency. We have proposed an experiment to test the persistence of the polarization in a fusion process, using a terawatt laser hitting a polarized HD target. The polarized deuterons heated in the plasma induced by the laser can fuse producing a 3He and a neutron in the final state. The angular distribution of the neutrons and the change in the corresponding total cross section are related to the polarization persistence. The experimental polarization of DT fuel is a technological challenge. Possible paths for Magnetic Confinement Fusion (MCF and for Inertial Confinement Fusion (ICF are reviewed. For MCF, polarized gas can be used. For ICF, cryogenic targets are required. We consider both, the polarization of gas and the polarization of solid DT, emphasizing the Dynamic Nuclear polarization (DNP of HD and DT molecules.

  7. The development of the Asian Forum for Polar Sciences (AFoPS)

    Science.gov (United States)

    Kim, Yeadong; Jeong, Jihoon

    2015-12-01

    The Asian Forum for Polar Sciences (AFoPS), an international forum of Asian polar research institutes, was established for the advancement of polar sciences among its members in 2004. The Forum has served as an important medium of Asian collective endeavors for polar affairs in human and information exchange, research collaboration, and logistics cooperation for the last decade. The historical development of the AFoPS in retrospect can be divided into four phases: inception and establishment (2003-2004), growth and expansion (2005-2007), review and restructuring (2008-2011), and achievements and further measures (2012-2014). The progress of the AFoPS has not been linear and this trend will continue into the next decades. The Forum, however, clearly made achievements in this period of time, realizing multilateral research and logistics cooperation that would have been previously unimaginable; by doing so, it has laid the foundation for the future. Responsible for a great portion of the world's polar activities, the AFoPS will rise to meet the expectations of the world by producing notable research output, initiating international cooperative programs, and supporting non-polar Asian countries with education and research collaboration. These are the tasks of the AFoPS for the next decade and they require strategy that promotes and facilitates collaboration in a practical way and draws attention of non-polar Asian countries to the polar sciences.

  8. Study by polarized muon

    International Nuclear Information System (INIS)

    Yamazaki, Toshimitsu

    1977-01-01

    Experiments by using polarized muon beam are reported. The experiments were performed at Berkeley, U.S.A., and at Vancouver, Canada. The muon spin rotation is a useful method for the study of the spin polarization of conductive electrons in paramagnetic Pd metal. The muon Larmor frequency and the relaxation time can be obtained by measuring the time distribution of decay electrons of muon-electron process. The anomalous depolarization of negative muon spin rotation in the transitional metal was seen. The circular polarization of the negative muon X-ray was measured to make clear this phenomena. The experimental results show that the anomalous depolarization is caused at the 1-S-1/2 state. For the purpose to obtain the strong polarization of negative muon, a method of artificial polarization is proposed, and the test experiments are in progress. The study of the hyperfine structure of mu-mesic atoms is proposed. The muon capture rate was studied systematically. (Kato, T.)

  9. Polarized protons at RHIC

    International Nuclear Information System (INIS)

    Tannenbaum, M.J.

    1990-12-01

    The Physics case is presented for the use of polarized protons at RHIC for one or two months each year. This would provide a facility with polarizations of approx-gt 50% high luminosity ∼2.0 x 10 32 cm -2 s -1 , the possibility of both longitudinal and transverse polarization at the interaction regions, and frequent polarization reversal for control of systematic errors. The annual integrated luminosity for such running (∼10 6 sec per year) would be ∫ Ldt = 2 x 10 38 cm -2 -- roughly 20 times the total luminosity integrated in ∼ 10 years of operation of the CERN Collider (∼10 inverse picobarns, 10 37 cm -2 ). This facility would be unique in the ability to perform parity-violating measurements and polarization test of QCD. Also, the existence of p-p collisions in a new energy range would permit the study of ''classical'' reactions like the total cross section and elastic scattering, etc., and serve as a complement to measurements from p-bar p colliders. 11 refs

  10. The Bochum Polarized Target

    International Nuclear Information System (INIS)

    Reicherz, G.; Goertz, S.; Harmsen, J.; Heckmann, J.; Meier, A.; Meyer, W.; Radtke, E.

    2001-01-01

    The Bochum 'Polarized Target' group develops the target material 6 LiD for the COMPASS experiment at CERN. Several different materials like alcohols, alcanes and ammonia are under investigation. Solid State Targets are polarized in magnetic fields higher than B=2.5T and at temperatures below T=1K. For the Dynamic Nuclear Polarization process, paramagnetic centers are induced chemically or by irradiation with ionizing beams. The radical density is a critical factor for optimization of polarization and relaxation times at adequate magnetic fields and temperatures. In a high sensitive EPR--apparatus, an evaporator and a dilution cryostat with a continuous wave NMR--system, the materials are investigated and optimized. To improve the polarization measurement, the Liverpool NMR-box is modified by exchanging the fixed capacitor for a varicap diode which not only makes the tuning very easy but also provides a continuously tuned circuit. The dependence of the signal area upon the circuit current is measured and it is shown that it follows a linear function

  11. MANAJEMEN EDITING POST PRODUCTION PROGRAM CURRENT AFFAIR DI TVONE

    Directory of Open Access Journals (Sweden)

    Ridho Azlam Ambo Asse

    2016-11-01

    Full Text Available Management is the art of completing the work through others. In an organization there are various components that are structured and coordinated in the movement toward shared vision and mission. Management is looking for that component to move under coordination, pressure, and problems that hit. Editing management, especially for the current affair type program, has a special purpose. Not just the speed of productivity that is based on the ability of individual editors. This research is done to know the process of stage editor in work. The process of managing files, data management, human resources, tools, facilities, scheduling, until the pattern of editing stage in one of the national media industry. This study concludes that the current affair program management editing system based on the concept of planning, organizing, implementation, supervision, and productivity management is done by Top Down method from top to bottom in the management of currenf affair tvOne editing program. What gets from above during a pre-production meeting of a program. Then coordinate with the supervisor and then delegate down to be implemented according to the agreed plan and in accordance with the duties and functions of both the production team and the editor.   Manajemen merupakan seni menyelesaikan pekerjaan melalui orang lain. Dalam sebuah organisasi terdapat berbagai macam komponen yang terstruktur dan terkordinasi dalam gerakan menuju visi dan misi bersama. Manajemen ialah mencari agar komponen tersebut dapat bergerak dibawah koordinasi, tekanan, dan masalah yang menerpa. Manajemen editing khususnya untuk program berjenis current affair, memiliki tujuan khusus. Tidak sekedar kecepatan produktifitas yang didasarkan pada kemampuan individu editor. Penelitian yang dilakukan ini untuk mengetahui proses tahapan editor dalam bekerja. Proses mengelola file, pengelolaan data, sumber daya manusia, alat, fasilitas, penjadwalan, hingga pola tahapan editing pada salah

  12. Polarized source upgrading

    International Nuclear Information System (INIS)

    Clegg, T.B.; Rummel, R.L.; Carter, E.P.; Westerfeldt, C.R.; Lovette, A.W.; Edwards, S.E.

    1985-01-01

    The decision was made this past year to move the Lamb-shift polarized ion source which was first installed in the laboratory in 1970. The motivation was the need to improve the flexibility of spin-axis orientation by installing the ion source with a new Wien-filter spin precessor which is capable of rotating physically about the beam axis. The move of the polarized source was accomplished in approximately two months, with the accelerator being turned off for experiments during approximately four weeks of this time. The occasion of the move provided the opportunity to rewire completely the entire polarized ion source frame and to rebuild approximately half of the electronic chassis on the source. The result is an ion source which is now logically wired and carefully documented. Beams obtained from the source are much more stable than those previously available

  13. Polarized electron sources

    International Nuclear Information System (INIS)

    Clendenin, J.E.

    1995-05-01

    Polarized electron sources for high energy accelerators took a significant step forward with the introduction of a new laser-driven photocathode source for the SLC in 1992. With an electron beam polarization of >80% and with ∼99% uptime during continuous operation, this source is a key factor in the success of the current SLC high-energy physics program. The SLC source performance is used to illustrate both the capabilities and the limitations of solid-state sources. The beam requirements for future colliders are similar to that of the SLC with the addition in most cases of multiple-bunch operation. A design for the next generation accelerator source that can improve the operational characteristics and at least minimize some of the inherent limitations of present sources is presented. Finally, the possibilities for producing highly polarized electron beams for high-duty-factor accelerators are discussed

  14. Time Domain Induced Polarization

    DEFF Research Database (Denmark)

    Fiandaca, Gianluca; Auken, Esben; Christiansen, Anders Vest

    2012-01-01

    Time-domain-induced polarization has significantly broadened its field of reference during the last decade, from mineral exploration to environmental geophysics, e.g., for clay and peat identification and landfill characterization. Though, insufficient modeling tools have hitherto limited the use...... of time-domaininduced polarization for wider purposes. For these reasons, a new forward code and inversion algorithm have been developed using the full-time decay of the induced polarization response, together with an accurate description of the transmitter waveform and of the receiver transfer function......, to reconstruct the distribution of the Cole-Cole parameters of the earth. The accurate modeling of the transmitter waveform had a strong influence on the forward response, and we showed that the difference between a solution using a step response and a solution using the accurate modeling often is above 100...

  15. A lunar polar expedition

    Science.gov (United States)

    Dowling, Richard; Staehle, Robert L.; Svitek, Tomas

    1992-09-01

    Advanced exploration and development in harsh environments require mastery of basic human survival skill. Expeditions into the lethal climates of Earth's polar regions offer useful lessons for tommorrow's lunar pioneers. In Arctic and Antarctic exploration, 'wintering over' was a crucial milestone. The ability to establish a supply base and survive months of polar cold and darkness made extensive travel and exploration possible. Because of the possibility of near-constant solar illumination, the lunar polar regions, unlike Earth's may offer the most hospitable site for habitation. The World Space Foundation is examining a scenario for establishing a five-person expeditionary team on the lunar north pole for one year. This paper is a status report on a point design addressing site selection, transportation, power, and life support requirements.

  16. Modelling Polar Self Assembly

    Science.gov (United States)

    Olvera de La Cruz, Monica; Sayar, Mehmet; Solis, Francisco J.; Stupp, Samuel I.

    2001-03-01

    Recent experimental studies in our group have shown that self assembled thin films of noncentrosymmetric supramolecular objects composed of triblock rodcoil molecules exhibit finite polar order. These aggregates have both long range dipolar and short range Ising-like interactions. We study the ground state of a simple model with these competing interactions. We find that the competition between Ising-like and dipolar forces yield a periodic domain structure, which can be controlled by adjusting the force constants and film thickness. When the surface forces are included in the potential, the system exhibits a finite macroscopic polar order.

  17. AGS polarized H- source

    International Nuclear Information System (INIS)

    Kponou, A.; Alessi, J.G.; Sluyters, T.

    1985-01-01

    The AGS polarized H - source is now operational. During a month-long experimental physics run in July 1984, pulses equivalent to 15 μA x 300 μs (approx. 3 x 10 10 protons) were injected into the RFQ preaccelerator. Beam polarization, measured at 200 MeV, was approx. 75%. After the run, a program to increase the H - yield of the source was begun and significant progress has been made. The H - current is now frequently 20 to 30 μA. A description of the source and some details of our operating experience are given. We also briefly describe the improvement program

  18. The polar mesosphere

    International Nuclear Information System (INIS)

    Morris, Ray; Murphy, Damian

    2008-01-01

    The mesosphere region, which lies at the edge of space, contains the coldest layer of the Earth's atmosphere, with summer temperatures as low as minus 130 °C. In this extreme environment ice aerosol layers have appeared since the dawn of industrialization—whose existence may arguably be linked to human influence—on yet another layer of the Earth's fragile atmosphere. Ground-based and space-based experiments conducted in the Arctic and Antarctic during the International Polar Year (IPY) aim to address limitations in our knowledge and to advance our understanding of thermal and dynamical processes at play in the polar mesosphere

  19. Imaging with Polarized Neutrons

    Directory of Open Access Journals (Sweden)

    Nikolay Kardjilov

    2018-01-01

    Full Text Available Owing to their zero charge, neutrons are able to pass through thick layers of matter (typically several centimeters while being sensitive to magnetic fields due to their intrinsic magnetic moment. Therefore, in addition to the conventional attenuation contrast image, the magnetic field inside and around a sample can be visualized by detecting changes of polarization in a transmitted beam. The method is based on the spatially resolved measurement of the cumulative precession angles of a collimated, polarized, monochromatic neutron beam that traverses a magnetic field or sample.

  20. Polarization splitter and polarization rotator designs based on transformation optics.

    Science.gov (United States)

    Kwon, Do-Hoon; Werner, Douglas H

    2008-11-10

    The transformation optics technique is employed in this paper to design two optical devices - a two-dimensional polarization splitter and a three-dimensional polarization rotator for propagating beams. The polarization splitter translates the TM- and the TE-polarized components of an incident beam in opposite directions (i.e., shifted up or shifted down). The polarization rotator rotates the polarization state of an incoming beam by an arbitrary angle. Both optical devices are reflectionless at the entry and exit interfaces. Design details and full-wave simulation results are provided.

  1. A NEW COLLEAGUE IN THE SOCIAL AFFAIRS SERVICE

    CERN Multimedia

    2001-01-01

    The Social Affairs Service is pleased to announce that from now on it offers the services of a psychologist on Tuesday and Thursday mornings. The Social Affairs Service is a centre offering advice and support which can provide the following: Information and documentation (education for your children, language courses, child-minding facilities, health-related matters etc.). Information on social protection (illness, disability, handicap, retirement, death, etc.) and integration. Assistance in dealings with the authorities/services concerned. Consultations with a view to resolving problems of a personal, family or professional nature, such as problems of dependancy (alcohol, drugs, relationship) or behavioural problems (stress, depression, eating disorders). Support in facing new situations (maternity, divorce, bereavement, change of post, geographical isolation). Assistance with decision making relating to family, personal or professional matters. The team is at the disposition of all members of person...

  2. Internal Affairs Sector: Towards a new Law on Police

    Directory of Open Access Journals (Sweden)

    Radivojević Nenad P.

    2015-01-01

    Full Text Available By establishing the Inspector General's Service within the Department of Public Safety in 2001, Serbia became one of the countries that have institutionalized internal control of the police. By the adoption of the Law on Police in 2005, the name of the Service was renamed in the Internal Affairs Sector. Ten years of work of the Internal Affairs Sector revealed the existence of certain problems because of a inadequate and not complete legal framework. That was, among other, the reason for initiating the adoption of the new Law on Police. This paper presents solutions of the Draft Law on Police, in part related to the work of the Sector. The Draft contains some new solutions that could improve the efficiency of the Sector, but some doubts and uncertainties still remain, that will also be explained in this paper.

  3. Polarized Proton Collisions at RHIC

    CERN Document Server

    Bai, Mei; Alekseev, Igor G; Alessi, James; Beebe-Wang, Joanne; Blaskiewicz, Michael; Bravar, Alessandro; Brennan, Joseph M; Bruno, Donald; Bunce, Gerry; Butler, John J; Cameron, Peter; Connolly, Roger; De Long, Joseph; Drees, Angelika; Fischer, Wolfram; Ganetis, George; Gardner, Chris J; Glenn, Joseph; Hayes, Thomas; Hseuh Hsiao Chaun; Huang, Haixin; Ingrassia, Peter; Iriso, Ubaldo; Laster, Jonathan S; Lee, Roger C; Luccio, Alfredo U; Luo, Yun; MacKay, William W; Makdisi, Yousef; Marr, Gregory J; Marusic, Al; McIntyre, Gary; Michnoff, Robert; Montag, Christoph; Morris, John; Nicoletti, Tony; Oddo, Peter; Oerter, Brian; Osamu, Jinnouchi; Pilat, Fulvia Caterina; Ptitsyn, Vadim; Roser, Thomas; Satogata, Todd; Smith, Kevin T; Svirida, Dima; Tepikian, Steven; Tomas, Rogelio; Trbojevic, Dejan; Tsoupas, Nicholaos; Tuozzolo, Joseph; Vetter, Kurt; Wilinski, Michelle; Zaltsman, Alex; Zelenski, Anatoli; Zeno, Keith; Zhang, S Y

    2005-01-01

    The Relativistic Heavy Ion Collider~(RHIC) provides not only collisions of ions but also collisions of polarized protons. In a circular accelerator, the polarization of polarized proton beam can be partially or fully lost when a spin depolarizing resonance is encountered. To preserve the beam polarization during acceleration, two full Siberian snakes were employed in RHIC to avoid depolarizing resonances. In 2003, polarized proton beams were accelerated to 100~GeV and collided in RHIC. Beams were brought into collisions with longitudinal polarization at the experiments STAR and PHENIX by using spin rotators. RHIC polarized proton run experience demonstrates that optimizing polarization transmission efficiency and improving luminosity performance are significant challenges. Currently, the luminosity lifetime in RHIC is limited by the beam-beam effect. The current state of RHIC polarized proton program, including its dedicated physics run in 2005 and efforts to optimize luminosity production in beam-beam limite...

  4. Homeland Security Affairs Journal, Volume II - 2006: Issue 1, April

    OpenAIRE

    2006-01-01

    Homeland Security Affairs is the peer-reviewed online journal of the Naval Postgraduate School Center for Homeland Defense and Security (CHDS), providing a forum to propose and debate strategies, policies, and organizational arrangements to strengthen U.S. homeland security. The instructors, participants, alumni, and partners of CHDS represent the leading subject matter experts and practitioners in the field of homeland security. April 2006. Welcome to the third edition of Homeland Securit...

  5. Student Affairs administrator shares research on Millennial Generation

    OpenAIRE

    DeLauder, Rachel

    2006-01-01

    Edward Spencer of Blacksburg, Va., associate vice president for student affairs at Virginia Tech, conducted a presentation at the North Cross School in Roanoke, Va., about his research on the Millennial Generation, which represents Americans born between 1982 and the present. The presentation, titled"Understanding and Working with Millennials," focused on the changing relationship between parents and this new generation and how parents can prepare them for success in higher education and the ...

  6. Role of Student Affairs in International Student Transition and Success

    OpenAIRE

    Christina W. Yao; Chrystal A. George Mwangi

    2017-01-01

    International student mobility has grown significantly in recent years, with over 4.1 million students in 2013 who studied abroad around the world (Institute of International Education [IIE], 2016). With the changes in student demographics and increased mobility, student affairs professionals are in a unique role to support international student transition and success. Unfortunately, current research and practice in higher education tends to place a high level of respo...

  7. Accuracy of Veterans Affairs Databases for Diagnoses of Chronic Diseases

    OpenAIRE

    Singh, Jasvinder A.

    2009-01-01

    Introduction Epidemiologic studies usually use database diagnoses or patient self-report to identify disease cohorts, but no previous research has examined the extent to which self-report of chronic disease agrees with database diagnoses in a Veterans Affairs (VA) health care setting. Methods All veterans who had a medical care visit from October 1, 1996, through May 31, 1998, at any of the Veterans Integrated Service Network 13 facilities were surveyed about physician diagnosis of chronic ob...

  8. The Lavelle Affair: An Air Force Case Study in Ethics

    Science.gov (United States)

    2016-06-01

    THE LAVELLE AFFAIR: AN AIR FORCE CASE STUDY IN ETHICS BY KRISTINA ELLIS A THESIS PRESENTED TO THE FACULTY OF THE SCHOOL OF... ethical transgressions. As such, the story of General Lavelle’s wartime command experiences became a case study in ethics and integrity within Air...1 1 THE LIFE AND CAREER OF GENERAL LAVELLE 8 1 VIETNAM 14 2 CIVIL-MILITARY RELATIONS 25 2 ETHICAL

  9. Global power knowledge science and technology in international affairs

    CERN Document Server

    Barth, Kai-Henrik

    2006-01-01

    Osiris annualy examines a particular topic in the history of science, bringing together experts in the field to consider multiple aspects of the time period, episode, or theme. Volume 21, Historical Perspectives on Science, Technology, and International Affairs, explores the ways in which scientists and issues in science and technology have played significant roles in foreign policy and international relations, especially since the Second World War.

  10. Study of Intrinsic motivation in the Ministry for Foreign Affairs

    OpenAIRE

    Lehtimäki, Nora

    2015-01-01

    The purpose of this thesis was to investigate intrinsic motivation of the executive assistants and secretaries in the Ministry for Foreign Affairs. The objective in turn, was to examine how well intrinsic motivation has been achieved among these executive assistants and secretaries. How respondents evaluate their job satisfaction, work environment and motivation was also researched. Lastly, factors that increase or decrease motivation were studied, as well as if there is a need for additional...

  11. Dr. David Syz, State Secretary for Economic Affairs, Switzerland

    CERN Multimedia

    Maximilien Brice

    2003-01-01

    Dr. David Syz, State Secretary for Economic Affairs, Switzerland is seen here (seventh from right) visiting the assembly hall for the ATLAS experiment during his recent visit to CERN. To his right is Dr. Peter Jenni (blue shirt), spokesperson for the ATLAS Collaboration. The horizontal metal cylinder behind the group is one of the eight vacuum vessels for the superconducting coils of the ATLAS barrel toroid magnet system.

  12. China Report, Political, Sociological and Military Affairs, No. 446.

    Science.gov (United States)

    1983-08-11

    Islamism , Catholicism, and Protestantism) and is an inherent and "locally born and bred" religion in China. Taoism is a religion which respects Lao Zi...XINHUA, 7 Jul 83) 80 Taoism Reported Reviving Throughout Country (Tian Di; ZH0NGGU0 XINWEN SHE, 11 Jul 83) 81 ZH0NGGU0 QINGNIAN BAO...disciplined transport army with ideals, morality and culture. The conference was held from 1 to 6 July. CSO: 4005/1008 80 NATIONAL AFFAIRS TAOISM

  13. Improving trends in gender disparities in the Department of Veterans Affairs: 2008-2013.

    Science.gov (United States)

    Whitehead, Alison M; Czarnogorski, Maggie; Wright, Steve M; Hayes, Patricia M; Haskell, Sally G

    2014-09-01

    Increasing numbers of women veterans using Department of Veterans Affairs (VA) services has contributed to the need for equitable, high-quality care for women. The VA has evaluated performance measure data by gender since 2006. In 2008, the VA launched a 5-year women's health redesign, and, in 2011, gender disparity improvement was included on leadership performance plans. We examined data from VA Office of Analytics and Business Intelligence quarterly gender reports for trends in gender disparities in gender-neutral performance measures from 2008 to 2013. Through reporting of data by gender, leadership involvement, electronic reminders, and population management dashboards, VA has seen a decreasing trend in gender inequities on most Health Effectiveness Data and Information Set performance measures.

  14. Improving Trends in Gender Disparities in the Department of Veterans Affairs: 2008–2013

    Science.gov (United States)

    Czarnogorski, Maggie; Wright, Steve M.; Hayes, Patricia M.; Haskell, Sally G.

    2014-01-01

    Increasing numbers of women veterans using Department of Veterans Affairs (VA) services has contributed to the need for equitable, high-quality care for women. The VA has evaluated performance measure data by gender since 2006. In 2008, the VA launched a 5-year women’s health redesign, and, in 2011, gender disparity improvement was included on leadership performance plans. We examined data from VA Office of Analytics and Business Intelligence quarterly gender reports for trends in gender disparities in gender-neutral performance measures from 2008 to 2013. Through reporting of data by gender, leadership involvement, electronic reminders, and population management dashboards, VA has seen a decreasing trend in gender inequities on most Health Effectiveness Data and Information Set performance measures. PMID:25100416

  15. Energy and Spatial Planning. Advice to the Minister of Economic Affairs, 29 June 2000

    International Nuclear Information System (INIS)

    2000-08-01

    The Dutch Minister of Economic Affairs requested the General Energy Council (AER, abbreviated in Dutch) to advice on spatial planning aspects of energy in the Netherlands, focusing on (1) the spatial facilities c.q. measures to be taken by the Dutch government to guarantee an adequate energy production and energy distribution in the long term; and (2) how to realize the targets for and stimulate the use of renewable energy within the spatial planning process. The vision of the AER is placed against the background of societal actuality of democratization and support of the Dutch population. For that reason in the appendix an overview is given of causes and possible administrative methods of the so-called NIMBY (Not In My Back Yard) phenomenon. 53 refs

  16. AGU Public Affairs: How to Get Involved in Science Policy

    Science.gov (United States)

    Landau, E. A.; Hankin, E. R.; Uhlenbrock, K. M.

    2012-12-01

    AGU Public Affairs offers many ways for its members to get involved in science policy at different levels of participation, whether you would love to spend a year working as a resident science expert in a congressional office in Washington, D.C., or would rather simply receive email alerts about Earth and space science policy news. How you can get involved: Sign up for AGU Science Policy Alerts to receive the most relevant Earth and space science policy information delivered to your email inbox. Participate in one of AGU's Congressional Visits Days to speak with your legislators about important science issues. Attend the next AGU Science Policy Conference in spring 2013. Participate in events happening on Capitol Hill, and watch video of past events. Learn about AGU Embassy Lectures, where countries come together to discuss important Earth and space science topics. Learn how you can comment on AGU Position Statements. Apply to be an AGU Congressional Science Fellow, where you can work in a congressional office for one year and serve as a resident science expert, or to be an AGU Public Affairs Intern, where you can work in the field of science policy for three months. The AGU Public Affairs Team will highlight ways members can be involved as well as provide information on how the team is working to shape policy and inform society about the excitement of AGU science.

  17. 77 FR 14600 - Public Availability of the Department of Veterans Affairs Fiscal Year (FY) 2011 Service Contract...

    Science.gov (United States)

    2012-03-12

    ... DEPARTMENT OF VETERANS AFFAIRS Public Availability of the Department of Veterans Affairs Fiscal Year (FY) 2011 Service Contract Inventory AGENCY: Department of Veterans Affairs. ACTION: Notice of... Affairs (VA) is publishing this notice to advise the public of the availability of the FY 2011 Service...

  18. Polarized coincidence electroproduction

    International Nuclear Information System (INIS)

    Heimann, R.L.

    1975-03-01

    A study is made of the inclusive electroproduction of single hadrons off a polarized target. Bjorken scaling laws and the hadron azimuthal distribution are derived from the quark parton model. The polarization asymmetries scale when the target spin is along the direction of the virtual photon, and (apart from significant exception) vanish for transverse spin. These results have a simple explanation; emphasis is given both to the general mathematical formalism and to intuitive physical reasoning. Through this framework other cases are considered: quarks with anomalous magnetic moment; renormalization group effects and asymptotic freedom; production of vector mesons (whose spin state is analysed by their decay); relation to large transverse momentum hadron production; and a covariant parton model calculation. Spin 0 partons and Regge singularities are also considered. All of these cases (apart from the last two) modify the pattern of conclusions. Vector meson production shows polarization enhancements in the density matrix element rhosub(0+); the renormalization group approach does not lead to any significant suppressions. They are also less severe in parton models for large Psub(T) hadrons, and are not supported by the covariantly formulated calculation. The origins of these differences are isolated and used to exemplify the sensitivity polarized hadron electroproduction has to delicate detail that is otherwise concealed. (author)

  19. Fluorescence confocal polarizing microscopy

    Indian Academy of Sciences (India)

    Much of the modern understanding of orientational order in liquid crystals (LCs) is based on polarizing microscopy (PM). A PM image bears only two-dimensional (2D) information, integrating the 3D pattern of optical birefringence over the path of light. Recently, we proposed a technique to image 3D director patterns by ...

  20. Optical neutron polarizers

    International Nuclear Information System (INIS)

    Hayter, J.B.

    1990-01-01

    A neutron wave will be refracted by an appropriately varying potential. Optical neutron polarizers use spatially varying, spin- dependent potentials to refract neutrons of opposite spin states into different directions, so that an unpolarized beam will be split into two beams of complementary polarization by such a device. This paper will concentrate on two methods of producing spin-dependent potentials which are particularly well-suited to polarizing cold neutron beams, namely thin-film structures and field-gradient techniques. Thin-film optical devices, such as supermirror multilayer structures, are usually designed to deviate only one spin-state, so that they offer the possibility of making insertion (transmission) polarizers. Very good supermirrors may now be designed and fabricated, but it is not always straightforward to design mirror-based devices which are useful in real (divergent beam) applications, and some practical configurations will be discussed. Field-gradient devices, which are usually based on multipolar magnets, have tended to be too expensive for general use, but this may change with new developments in superconductivity. Dipolar and hexapolar configurations will be considered, with emphasis on the focusing characteristics of the latter. 21 refs., 7 figs

  1. Titan Polar Landscape Evolution

    Science.gov (United States)

    Moore, Jeffrey M.

    2016-01-01

    With the ongoing Cassini-era observations and studies of Titan it is clear that the intensity and distribution of surface processes (particularly fluvial erosion by methane and Aeolian transport) has changed through time. Currently however, alternate hypotheses substantially differ among specific scenarios with respect to the effects of atmospheric evolution, seasonal changes, and endogenic processes. We have studied the evolution of Titan's polar region through a combination of analysis of imaging, elevation data, and geomorphic mapping, spatially explicit simulations of landform evolution, and quantitative comparison of the simulated landscapes with corresponding Titan morphology. We have quantitatively evaluated alternate scenarios for the landform evolution of Titan's polar terrain. The investigations have been guided by recent geomorphic mapping and topographic characterization of the polar regions that are used to frame hypotheses of process interactions, which have been evaluated using simulation modeling. Topographic information about Titan's polar region is be based on SAR-Topography and altimetry archived on PDS, SAR-based stereo radar-grammetry, radar-sounding lake depth measurements, and superposition relationships between geomorphologic map units, which we will use to create a generalized topographic map.

  2. The polarized EMC effect

    Energy Technology Data Exchange (ETDEWEB)

    W. Bentz; I. C. Cloet; A. W. Thomas

    2007-02-01

    We calculate both the spin independent and spin dependent nuclear structure functions in an effective quark theory. The nucleon is described as a composite quark-diquark state, and the nucleus is treated in the mean field approximation. We predict a sizable polarized EMC effect, which could be confirmed in future experiments.

  3. Polarizer reflectivity variations

    International Nuclear Information System (INIS)

    Ozarski, R.G.; Prior, J.

    1980-01-01

    On Shiva the beam energy along the chain is monitored using available reflections and/or transmission through beam steering, splitting, and polarizing optics without the intrusion of any additional glass for diagnostics. On the preamp table the diagnostic signal is obtained from the signal transmitted through turning mirrors. At the input of each chain the signal is obtained from the transmission through one of the mirrors used for the chain input alignment sensor (CHIP). At the chain output the transmission through the final turning mirror is used. These diagnostics have proved stable and reliable. However, one of the prime diagnostic locations is at the output of the beta rod. The energy at this location is measured by collecting small reflections from the last polarizer surface of the beta Pockels cell polarizer package. Unfortunately, calibration of this diagnostic has varied randomly, seldom remaining stable for a week or more. The cause of this fluctuation has been investigated for the past year and'it has been discovered that polarizer reflectivity varies with humidity. This report will deal with the possible causes that were investigated, the evidence that humidity is causing the variation, and the associated mechanism

  4. Spin-polarized photoemission

    International Nuclear Information System (INIS)

    Johnson, Peter D.

    1997-01-01

    Spin-polarized photoemission has developed into a versatile tool for the study of surface and thin film magnetism. In this review, we examine the methodology of the technique and its application to a number of different problems, including both valence band and core level studies. After a detailed review of spin-polarization measurement techniques and the related experimental requirements we consider in detail studies of the bulk properties both above and below the Curie temperature. This section also includes a discussion of observations relating to unique metastable phases obtained via epitaxial growth. The application of the technique to the study of surfaces, both clean and adsorbate covered, is reviewed. The report then examines, in detail, studies of the spin-polarized electronic structure of thin films and the related interfacial magnetism. Finally, observations of spin-polarized quantum well states in non-magnetic thin films are discussed with particular reference to their mediation of the oscillatory exchange coupling in related magnetic multilayers. (author)

  5. Polarization of Bremsstrahlung

    International Nuclear Information System (INIS)

    Miller, J.

    1957-01-01

    The numerical results for the polarization of Bremsstrahlung are presented. The multiple scattering of electrons in the target is taken into account. The angular-and photon energy dependences are seen on the curves for an incident 25 MeV electron energy. (Author) [fr

  6. No More Polarization, Please!

    DEFF Research Database (Denmark)

    Hansen, Mia Reinholt

    and the increasing levels of complexities it entails, such polarization is not fruitful in the attempt to explain motivation of organizational members. This paper claims that a more nuanced perspective on motivation, acknowledging the co-existence of intrinsic and extrinsic motivation, the possible interaction...

  7. DESY: HERA polarization

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    The new HERA electron-proton collider at DESY in Hamburg achieved the first luminosity for electron-proton collisions on 19 October last year. Only one month later, on 20 November, HERA passed another important milestone with the observation of transverse electron polarization

  8. Polarized Neutron Scattering

    OpenAIRE

    Roessli, B.; Böni, P.

    2000-01-01

    The technique of polarized neutron scattering is reviewed with emphasis on applications. Many examples of the usefulness of the method in various fields of physics are given like the determination of spin density maps, measurement of complex magnetic structures with spherical neutron polarimetry, inelastic neutron scattering and separation of coherent and incoherent scattering with help of the generalized XYZ method.

  9. DESY: HERA polarization

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1992-03-15

    The new HERA electron-proton collider at DESY in Hamburg achieved the first luminosity for electron-proton collisions on 19 October last year. Only one month later, on 20 November, HERA passed another important milestone with the observation of transverse electron polarization.

  10. Graphics of polar figure

    International Nuclear Information System (INIS)

    Macias B, L.R.

    1991-11-01

    The objective of this work, is that starting from a data file coming from a spectra that has been softened, and of the one that have been generated its coordinates to project it in stereographic form, to create the corresponding polar figure making use of the Cyber computer of the ININ by means of the GRAPHOS package. This work only requires a Beta, Fi and Intensity (I) enter data file. It starts of the existence of a softened spectra of which have been generated already with these data, making use of some language that in this case was FORTRAN for the Cyber computer, a program is generated supported in the Graphos package that allows starting of a reading of the Beta, Fi, I file, to generate the points in a stereographic projection and that it culminates with the graph of the corresponding polar figure. The program will request the pertinent information that is wanted to capture in the polar figure just as: date, name of the enter file, indexes of the polar figure, number of levels, radio of the stereographic projection (cms.), crystalline system to which belongs the sample, name the neuter graph file by create and to add the own general data. (Author)

  11. Polarized light and optical measurement

    CERN Document Server

    Clarke, D N; Ter Haar, D

    2013-01-01

    Polarized Light and Optical Measurement is a five-chapter book that begins with a self-consistent conceptual picture of the phenomenon of polarization. Chapter 2 describes a number of interactions of light and matter used in devising optical elements in polarization studies. Specific optical elements are given in Chapter 3. The last two chapters explore the measurement of the state of polarization and the various roles played in optical instrumentation by polarization and polarization-sensitive elements. This book will provide useful information in this field of interest for research workers,

  12. Polarized nuclear target based on parahydrogen induced polarization

    OpenAIRE

    Budker, D.; Ledbetter, M. P.; Appelt, S.; Bouchard, L. S.; Wojtsekhowski, B.

    2012-01-01

    We discuss a novel concept of a polarized nuclear target for accelerator fixed-target scattering experiments, which is based on parahydrogen induced polarization (PHIP). One may be able to reach a 33% free-proton polarization in the ethane molecule. The potential advantages of such a target include operation at zero magnetic field, fast ($\\sim$100 Hz) polarization reversal, and operation with large intensity of an electron beam.

  13. 2009 VHA Facility Quality and Safety Report - Population Quality of Care

    Data.gov (United States)

    Department of Veterans Affairs — The 2008 Hospital Report Card was mandated by the FY08 Appropriations Act, and focused on Congressionally-mandated metrics applicable to general patient populations....

  14. Experiments with Fermilab polarized proton and polarized antiproton beams

    International Nuclear Information System (INIS)

    Yokosawa, A.

    1990-01-01

    We summarize activities concerning the Fermilab polarized beams. They include a brief description of the polarized-beam facility, measurements of beam polarization by polarimeters, asymmetry measurements in the π degree production at high p perpendicular and in the Λ (Σ degree), π ± , π degree production at large x F , and Δσ L (pp, bar pp) measurements. 18 refs

  15. NUCLEON POLARIZATION IN 3-BODY MODELS OF POLARIZED LI-6

    NARCIS (Netherlands)

    SCHELLINGERHOUT, NW; KOK, LP; COON, SA; ADAM, RM

    1993-01-01

    Just as He-3 --> can be approximately characterized as a polarized neutron target, polarized Li-6D has been advocated as a good isoscalar nuclear target for the extraction of the polarized gluon content of the nucleon. The original argument rests upon a presumed ''alpha + deuteron'' picture of Li-6,

  16. Source of spin polarized electrons

    International Nuclear Information System (INIS)

    Pierce, D.T.; Meier, F.A.; Siegmann, H.C.

    1976-01-01

    A method is described of producing intense beams of polarized free electrons in which a semiconductor with a spin orbit split valence band and negative electron affinity is used as a photocathode and irradiated with circularly polarized light

  17. Linearly polarized photons at ELSA

    Energy Technology Data Exchange (ETDEWEB)

    Eberhardt, Holger [Physikalisches Institut, Universitaet Bonn (Germany)

    2009-07-01

    To investigate the nucleon resonance regime in meson photoproduction, double polarization experiments are currently performed at the electron accelerator ELSA in Bonn. The experiments make use of a polarized target and circularly or linearly polarized photon beams. Linearly polarized photons are produced by coherent bremsstrahlung from an accurately aligned diamond crystal. The orientation of the crystal with respect to the electron beam is measured using the Stonehenge-Technique. Both, the energy of maximum polarization and the plane of polarization, can be deliberately chosen for the experiment. The linearly polarized beam provides the basis for the measurement of azimuthal beam asymmetries, such as {sigma} (unpolarized target) and G (polarized target). These observables are extracted in various single and multiple meson photoproduction channels.

  18. North Polar Cap

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] This week we will be looking at five examples of laminar wind flow on the north polar cap. On Earth, gravity-driven south polar cap winds are termed 'catabatic' winds. Catabatic winds begin over the smooth expanse of the cap interior due to temperature differences between the atmosphere and the surface. Once begun, the winds sweep outward along the surface of the polar cap toward the sea. As the polar surface slopes down toward sealevel, the wind speeds increase. Catabatic wind speeds in the Antartic can reach several hundreds of miles per hour. In the images of the Martian north polar cap we can see these same type of winds. Notice the streamers of dust moving downslope over the darker trough sides, these streamers show the laminar flow regime coming off the cap. Within the trough we see turbulent clouds of dust, kicked up at the trough base as the winds slow down and enter a chaotic flow regime. The horizontal lines in these images are due to framelet overlap and lighting conditions over the bright polar cap. Image information: VIS instrument. Latitude 86.5, Longitude 64.5 East (295.5 West). 40 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time. NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen

  19. Stanford polarized atomic beam target

    International Nuclear Information System (INIS)

    Mavis, D.G.; Dunham, J.S.; Hugg, J.W.; Glavish, H.F.

    1976-01-01

    A polarized atomic beam source was used to produce an atomic hydrogen beam which was in turn used as a polarized proton target. A target density of 2 x 10'' atoms/cm 3 and a target polarization of 0.37 without the use of rf transitions were measured. These measurements indicate that a number of experiments are currently feasible with a variety of polarized target beams

  20. A circumpolar monitoring framework for polar bears

    Science.gov (United States)

    Vongraven, Dag; Aars, Jon; Amstrup, Steven C.; Atkinson, Stephen N.; Belikov, Stanislav; Born, Erik W.; DeBruyn, T.D.; Derocher, Andrew E.; Durner, George M.; Gill, Michael J.; Lunn, Nicholas J.; Obbard, Martyn E.; Omelak, Jack; Ovsyanikov, Nikita; Peacock, Elizabeth; Richardson, E.E.; Sahanatien, Vicki; Stirling, Ian; Wiig, Øystein

    2012-01-01

    Polar bears (Ursus maritimus) occupy remote regions that are characterized by harsh weather and limited access. Polar bear populations can only persist where temporal and spatial availability of sea ice provides adequate access to their marine mammal prey. Observed declines in sea ice availability will continue as long as greenhouse gas concentrations rise. At the same time, human intrusion and pollution levels in the Arctic are expected to increase. A circumpolar understanding of the cumulative impacts of current and future stressors is lacking, long-term trends are known from only a few subpopulations, and there is no globally coordinated effort to monitor effects of stressors. Here, we describe a framework for an integrated circumpolar monitoring plan to detect ongoing patterns, predict future trends, and identify the most vulnerable polar bear subpopulations. We recommend strategies for monitoring subpopulation abundance and trends, reproduction, survival, ecosystem change, human-caused mortality, human–bear conflict, prey availability, health, stature, distribution, behavioral change, and the effects that monitoring itself may have on polar bears. We assign monitoring intensity for each subpopulation through adaptive assessment of the quality of existing baseline data and research accessibility. A global perspective is achieved by recommending high intensity monitoring for at least one subpopulation in each of four major polar bear ecoregions. Collection of data on harvest, where it occurs, and remote sensing of habitat, should occur with the same intensity for all subpopulations. We outline how local traditional knowledge may most effectively be combined with the best scientific methods to provide comparable and complementary lines of evidence. We also outline how previously collected intensive monitoring data may be sub-sampled to guide future sampling frequencies and develop indirect estimates or indices of subpopulation status. Adoption of this framework

  1. Three-photon polarization ququarts: polarization, entanglement and Schmidt decompositions

    International Nuclear Information System (INIS)

    Fedorov, M V; Miklin, N I

    2015-01-01

    We consider polarization states of three photons, propagating collinearly and having equal given frequencies but with arbitrary distributed horizontal or vertical polarizations of photons. A general form of such states is a superposition of four basic three-photon polarization modes, to be referred to as the three-photon polarization ququarts (TPPQ). All such states can be considered as consisting of one- and two-photon parts, which can be entangled with each other. The degrees of entanglement and polarization, as well as the Schmidt decomposition and Stokes vectors of TPPQ are found and discussed. (paper)

  2. Polarization effects in hadron fragmentation

    International Nuclear Information System (INIS)

    Lednicky, R.

    1984-01-01

    Hadron polarization (spin alignment) and polarization asymmetry are discussed in terms of the quark recombination model with the spin-orbit interaction taken into account. It is shown that predictions of this model are at least in qualitative agreement with experimental data. Various polarization mechanisms in terms of this model and the possibility of their checking are also discussed

  3. THE CONTRIBUTION OF COMMUNICATION INTENSITY TO THE RESPONSIBILITY ATTITUDE OF SUPERVISORS IN THE OFFICE OF MINISTRY OF RELIGIOUS AFFAIRS AT MEDAN CITY

    Directory of Open Access Journals (Sweden)

    Mesiono

    2018-05-01

    Full Text Available This study aims to determine the magnitude of the contribution of communication intensity in the assignment of the responsibility attitude of the Supervisor at the Ministry of Religious Affairs Office at Medan. Hypothesis proposed; the intensity of communication in the assignment contributed significantly to the attitude of the Supervisory responsibility in the Ministry of Religious affairs Medan. The population of this study is all supervisors in the Ministry of Religious Affairs at Medan. Samples determined by Stratified Proportional Random Sampling Technique, obtained by 30 people. The instrument is designed with questionnaire form for communication intensity variable in assignment and responsibility attitude of Supervisor at Ministry of Religious Affairs at Medan. Two main conditions that must be owned by a data collection tool, they are; validity and reliability. Instrument validity was tested through content validity which was tested to 25 respondents outside the research sample. Instrument reliability was analyzed by Alpha Cronbach. The results of data analysis showed that the intensity of communication in the assignment has a significant contribution to the attitude of the Supervisory Board of Education in the City of Medan for 14.50% with a correlation coefficient of 0.381.

  4. Detection of polar vapours

    International Nuclear Information System (INIS)

    Blyth, D.A.

    1980-01-01

    Apparatus for monitoring for polar vapours in a gas consists of (i) a body member defining a passage through which a continuous stream of the gas passes; (ii) an ionising source associated with a region of the passage such that ionization of the gas stream takes place substantially only within the region and also any polar vapour molecules present therein will react with the gas formed to generate ion clusters; and (iii) an electrode for collecting ions carried by the gas stream, the electrode being positioned in the passage downstream of the region and separated from the region by a sufficient distance to ensure that no substantial number of the gas ions formed in said region remains in the gas stream at the collector electrode whilst ensuring that a substantial proportion of the ion clusters formed in the region does remain in the gas stream at the collector electrode. (author)

  5. Perspectives for polarized antiprotons

    International Nuclear Information System (INIS)

    Lenisa, Paolo

    2012-01-01

    Polarized antiprotons would open a new window in hadron physics providing access to a wealth of single and double spin observables in proton-antiproton interactions. The PAX Collaboration aims to perform the first ever measurement of the spin-dependence of the proton-antiproton cross section at the AD ring at CERN. The spin-dependence of the cross section could in principle be exploited by the spin-filtering technique for the production of a polarized antiproton beam. As a preparatory phase to the experimentation at AD, the PAX Collaboration has initiated a series of dedicated studies with protons at the COSY-ring in Juelich (Germany), aimed at the commissioning of the experimental apparatus and confirmation of the predictions for spin-filtering with protons.

  6. The Polar Cusp

    International Nuclear Information System (INIS)

    Holtet, J.A.; Egeland, A.

    1985-01-01

    The upper atmosphere at high latitudes is often called the ''earth's window to outer space.'' Through various electrodynamic coupling processes, as well as direct transfer of particles, many of the geophysical effects displayed are direct manifestations of phenomena occurring in deep space. The high latitude ionosphere also exerts a feedback on the regions of the magnetosphere and atmosphere to which it is coupled. Of particular interest are the sections of the near space known as the Polar Cusp. A vast portion of the Earth's magnetic field envelope is electrically connected to these regions. This geometry results in a spatial mapping of the magnetospheric processes and a focusing on the ionosphere. In the Polar Cusps, the solar wind plasma also has direct access to the upper atmosphere

  7. Polarized electrogowdy spacetimes censored

    International Nuclear Information System (INIS)

    Nungesser, Ernesto

    2010-01-01

    A sketch of the proof of strong cosmic censorship is presented for a class of solutions of the Einstein-Maxwell equations, those with polarized Gowdy symmetry. A key element of the argument is the observation that by means of a suitable choice of variables the central equations in this problem can be written in a form where they are identical to the central equations for general (i.e. non-polarized) vacuum Gowdy spacetimes. Using this it is seen that the results of Ringstroem on strong cosmic censorship in the vacuum case have implications for the Einstein-Maxwell case. Working out the geometrical meaning of these analytical results leads to the main conclusion.

  8. Polarized electrogowdy spacetimes censored

    Energy Technology Data Exchange (ETDEWEB)

    Nungesser, Ernesto, E-mail: ernesto.nungesser@aei.mpg.d [Max-Planck-Institut fuer Gravitationsphysik, Albert-Einstein-Institut, Am Muehlenberg 1, 14476 Potsdam (Germany)

    2010-05-01

    A sketch of the proof of strong cosmic censorship is presented for a class of solutions of the Einstein-Maxwell equations, those with polarized Gowdy symmetry. A key element of the argument is the observation that by means of a suitable choice of variables the central equations in this problem can be written in a form where they are identical to the central equations for general (i.e. non-polarized) vacuum Gowdy spacetimes. Using this it is seen that the results of Ringstroem on strong cosmic censorship in the vacuum case have implications for the Einstein-Maxwell case. Working out the geometrical meaning of these analytical results leads to the main conclusion.

  9. Polarization of lanthanum nucleus by dynamic polarization method

    International Nuclear Information System (INIS)

    Adachi, Toshikazu; Ishimoto, Shigeru; Masuda, Yasuhiro; Morimoto, Kimio

    1989-01-01

    Preliminary studies have been carried out concerning the application of a dynamic polarization method to polarizing lanthanum fluoride single crystal to be employed as target in experiments with time reversal invariance. The present report briefly outlines the dynamic polarization method and describes some preliminary studies carried out so far. Dynamic polarization is of particular importance because no techniques are currently available that can produce highly polarized static nucleus. Spin interaction between electrons and protons (nuclei) plays a major role in the dynamic polarization method. In a thermal equilibrium state, electrons are polarized almost completely while most protons are not polarized. Positively polarized proton spin is produced by applying microwave to this system. The most hopeful candidate target material is single crystal of LaF 3 containing neodymium because the crystal is chemically stable and easy to handle. The spin direction is of great importance in experiments with time reversal invariance. The spin of neutrons in the target can be cancelled by adjusting the external magnetic field applied to a frozen polarized target. In a frozen spin state, the polarity decreases slowly with a relaxation time that depends on the external magnetic field and temperature. (N.K.)

  10. Polar bears, Ursus maritimus

    Science.gov (United States)

    Rode, Karyn D.; Stirling, Ian

    2017-01-01

    Polar bears are the largest of the eight species of bears found worldwide and are covered in a pigment-free fur giving them the appearance of being white. They are the most carnivorous of bear species consuming a high-fat diet, primarily of ice-associated seals and other marine mammals. They range throughout the circumpolar Arctic to the southernmost extent of seasonal pack ice.

  11. Polarized advanced fuel reactors

    International Nuclear Information System (INIS)

    Kulsrud, R.M.

    1987-07-01

    The d- 3 He reaction has the same spin dependence as the d-t reaction. It produces no neutrons, so that if the d-d reactivity could be reduced, it would lead to a neutron-lean reactor. The current understanding of the possible suppression of the d-d reactivity by spin polarization is discussed. The question as to whether a suppression is possible is still unresolved. Other advanced fuel reactions are briefly discussed. 11 refs

  12. Polish polar research (outline

    Directory of Open Access Journals (Sweden)

    Krzysztof Ludwik Birkenmajer

    2017-12-01

    Full Text Available The article describes Polish research and discoveries in the Arctic and the Antarctic since the 19th century. The author is a geologist and since 1956 has been engaged in scientific field research on Spitsbergen, Greenland and Antarctica (23 expeditions. For many years chairman of the Committee on Polar Research of the Polish Academy of Sciences, he is now its Honorary Chairman.

  13. South Polar Polygons

    Science.gov (United States)

    2005-01-01

    4 July 2005 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a polgyon-cracked surface, into which deep, somewhat kidney-bean-shaped pits have formed. These are landscapes of the martian south polar residual cap. This view was captured during May 2005. Location near: 86.9oS, 5.1oW Image width: 1.5 km (0.9 mi) Illumination from: upper left Season Southern Spring

  14. Novel polar sedimentary porphyrins

    Science.gov (United States)

    Prowse, W. G.; Maxwell, J. R.

    1989-11-01

    Two polar nickel porphyrins in Messel oil shale are shown to be the C 32 and C 30 components IIIa,b. In the sample examined, component IIIa is by far the major porphyrin alcohol and is present in an abundance similar to that of the major nickel alkyl porphyrin. These primary alcohols, which do not appear to be artifacts, are structurally related to alkyl porphyrins reported previously in Serpiano oil shale.

  15. Polarization properties of linearly polarized parabolic scaling Bessel beams

    Energy Technology Data Exchange (ETDEWEB)

    Guo, Mengwen; Zhao, Daomu, E-mail: zhaodaomu@yahoo.com

    2016-10-07

    The intensity profiles for the dominant polarization, cross polarization, and longitudinal components of modified parabolic scaling Bessel beams with linear polarization are investigated theoretically. The transverse intensity distributions of the three electric components are intimately connected to the topological charge. In particular, the intensity patterns of the cross polarization and longitudinal components near the apodization plane reflect the sign of the topological charge. - Highlights: • We investigated the polarization properties of modified parabolic scaling Bessel beams with linear polarization. • We studied the evolution of transverse intensity profiles for the three components of these beams. • The intensity patterns of the cross polarization and longitudinal components can reflect the sign of the topological charge.

  16. Applications of polarized neutrons

    International Nuclear Information System (INIS)

    Mezei, F.

    1993-01-01

    The additional spin degree of freedom of the neutron can be made use of in neutron scattering work in two fundamental ways: (a) directly for the identification of magnetic scattering effects and (b) indirectly as a spectroscopic tool for modulating and analysing beams. Although strong magnetic scattering contributions can often be studied by unpolarized neutrons, a fully unambiguous separation of nuclear and magnetic phenomena can only be achieved by the additional information provided by polarized neutrons, especially if one of the two kinds of contributions is weak compared to the other. In the most general case a sample with both magnetic and nuclear features can be characterized by as many as 16 independent dynamic correlation functions instead of the single well known S(q, ω) for non-magnetic nuclear scattering only. Polarization analysis in principle allows one to determine all these 16 functions. The indirect applications of polarized neutrons are also steadily gaining importance. The most widely used method of this kind, the application of Larmor precessions for high resolution energy analysis in Neutron Spin Echo spectroscopy opened up a whole new domain in inelastic neutron scattering which was not accessible to any other spectroscopic method with or without neutrons before. (author)

  17. Pliocene geomagnetic polarity epochs

    Science.gov (United States)

    Dalrymple, G.B.; Cox, A.; Doell, Richard R.; Gromme, C.S.

    1967-01-01

    A paleomagnetic and K-Ar dating study of 44 upper Miocene and Pliocene volcanic units from the western United States suggests that the frequency of reversals of the earth's magnetic field during Pliocene time may have been comparable with that of the last 3.6 m.y. Although the data are too limited to permit the formal naming of any new polarity epochs or events, four polarity transitions have been identified: the W10 R/N boundary at 3.7 ?? 0.1 m.y., the A12 N/R boundary at 4.9 ?? 0.1 m.y., the W32 N/R boundary at 9.0 ?? 0.2m.y., and the W36 R/N boundary at 10.8 ?? 0.3 - 1.0 m.y. The loss of absolute resolution of K-Ar dating in older rocks indicates that the use of well defined stratigraphic successions to identify and date polarity transitions will be important in the study of Pliocene and older reversals. ?? 1967.

  18. Towards helium-3 neutron polarizers

    International Nuclear Information System (INIS)

    Tasset, F.

    1995-01-01

    With a large absorption cross-section entirely due to antiparallel spin capture, polarized helium-3 is presently the most promising broad-band polarizer for thermal and epithermal neutrons. Immediate interest was raised amongst the neutron community when a dense gaseous 3 He polarizer was used for the first time in 1988, on a pulsed neutron beam at Los Alamos. With 20 W of laser power on a 30 cm long, 8.6 atm target, 40% 3 He polarization was achieved in a recent polarized electron scattering experiment at SLAC. In this technique the 3 He nuclei are polarized directly at an appropriate high pressure through spin-exchange collisions with a thick, optically pumped rubidium vapor. A different and competitive approach is being presently developed at Mainz University in collaboration with ENS Paris and now the ILL. A discharge is established in pure 3 He at low pressure producing excited metastable atoms which can be optically pumped with infra-red light. Highly effective exchange collision with the atoms remaining in the ground state quickly produces 75% polarization at 1.5 mbar. A truly non-magnetic system then compresses the polarized gas up to several bars as required. The most recent machine comprises a two-stage glass-titanium compressor. In less than 1 h it can inflate a 100 cm 3 target cell with three bars of polarized gas. The very long relaxation times (several days) now being obtained at high pressure with a special metallic coating on the glass walls, the polarized cell can be detached and inserted in the neutron beam as polarizer. We expect 50% 3 He-polarization to be reached soon, allowing such filters to compete favorably with existing Heusler-crystal polarizers at thermal and short neutron wavelengths. It must be stressed that such a system based on a 3 He polarization factory able to feed several passive, transportable, polarizers is well matched to neutron scattering needs. (orig.)

  19. The Veterans Affairs Cardiac Risk Score: Recalibrating the Atherosclerotic Cardiovascular Disease Score for Applied Use.

    Science.gov (United States)

    Sussman, Jeremy B; Wiitala, Wyndy L; Zawistowski, Matthew; Hofer, Timothy P; Bentley, Douglas; Hayward, Rodney A

    2017-09-01

    Accurately estimating cardiovascular risk is fundamental to good decision-making in cardiovascular disease (CVD) prevention, but risk scores developed in one population often perform poorly in dissimilar populations. We sought to examine whether a large integrated health system can use their electronic health data to better predict individual patients' risk of developing CVD. We created a cohort using all patients ages 45-80 who used Department of Veterans Affairs (VA) ambulatory care services in 2006 with no history of CVD, heart failure, or loop diuretics. Our outcome variable was new-onset CVD in 2007-2011. We then developed a series of recalibrated scores, including a fully refit "VA Risk Score-CVD (VARS-CVD)." We tested the different scores using standard measures of prediction quality. For the 1,512,092 patients in the study, the Atherosclerotic cardiovascular disease risk score had similar discrimination as the VARS-CVD (c-statistic of 0.66 in men and 0.73 in women), but the Atherosclerotic cardiovascular disease model had poor calibration, predicting 63% more events than observed. Calibration was excellent in the fully recalibrated VARS-CVD tool, but simpler techniques tested proved less reliable. We found that local electronic health record data can be used to estimate CVD better than an established risk score based on research populations. Recalibration improved estimates dramatically, and the type of recalibration was important. Such tools can also easily be integrated into health system's electronic health record and can be more readily updated.

  20. Assessment of Service Members Knowledge and Trust of the Department of Veterans Affairs

    Science.gov (United States)

    2015-06-12

    www.va.gov/health/aboutVHA.asp. 24 Veterans Benefits Administration, “About VBA ,” last updated December 18, 2014, accessed May 10, 2015, http...Department of Veterans Affairs, 2014. Veterans Benefits Administration. “About VBA .” Last updated December 18, 2014. Accessed May 10, 2015. http...OIF Operation Iraqi Freedom VA Department of Veterans Affairs VA OIG Department of Veterans Affairs Office of Inspector General VBA Veterans Benefits

  1. Targeting Cell Polarity Machinery to Exhaust Breast Cancer Stem Cells

    Science.gov (United States)

    2017-10-01

    AWARD NUMBER: W81XWH-15-1-0644 TITLE: Targeting Cell Polarity Machinery to Exhaust Breast Cancer Stem Cells PRINCIPAL INVESTIGATOR: Chun-Ju...Targeting Cell Polarity Machinery to Exhaust Breast Cancer Stem Cells 5a. CONTRACT NUMBER 5b. GRANT NUMBER W81XWH-15-1-0644 5c. PROGRAM ELEMENT...Unlimited 13. SUPPLEMENTARY NOTES 14. ABSTRACT Cancer stem cells (CSCs), a cell population with acquired perpetuating self-renewal properties which

  2. Public Affairs: The Military and the Media, 1962-1968

    Science.gov (United States)

    1988-01-01

    Society," the debate over the Civil Rights Act of 1964, and the Beatles all shared space with South Vietnam in the pages of the press, more often than...07 United States Army in Vietnam Public Affairs: The Military and the Media, 1962-1968 by William M. Hammond A Center of Military History United...Di. t ib.tio [ Avaiiabiiity Codes Avail ar:dIor Dist zSpzcial \\ First Printing For sale by the Superintendent of Documents, U.S

  3. Affaires mondiales Canada | CRDI - Centre de recherches pour le ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    En tant que société d'État du gouvernement du Canada, nous jouons un rôle important dans les activités du Canada liées aux affaires étrangères et au développement. Nos partenariats appuient la recherche portant sur la santé des mères et des enfants, l'agriculture et la sécurité alimentaire et les données ouvertes pour le ...

  4. Dr. David Syz, State Secretary for Economic Affairs, Switzerland

    CERN Multimedia

    Maximilien Brice

    2003-01-01

    Dr. David Syz, State Secretary for Economic Affairs, Switzerland, toured the assembly hall of the ATLAS experiment on a recent visit to CERN.Photos 01, 02: Dr. Peter Jenni, spokesperson for the ATLAS experiment (second from left), explains to Dr. David Syz (fourth from left) and accompanying visitors the process of integration of a 26-metre-long coil of the barrel toroid magnet system into its coil casing.Photo 03: Dr. Peter Jenni (extreme right) with Dr. David Syz (front row, fourth from right) behind a stack of 26-metre-long 'racetrack' coils awaiting integration into their coil casings.

  5. Review of polarized ammonium target

    International Nuclear Information System (INIS)

    Matsuda, Tatsuo

    1987-01-01

    Recently, ammonia (NH 3 ) and deutron ammonia (ND 3 ), instead of conventional alcohol substances, have been used more frequently as a polarized target substance for experiments of polarization at high energy regions. This article reviews major features of the polarized (deutron) ammonia targets. The dynamic nuclear polarization (DNT) method is widely used in high energy polarization experiments. While only a low polarization degree of hydrogen nucleus of 1.7 percent can be obtained by the Brute force method, DNP can produce polarization as high as ∼ 90 percent (2.5 T, ∼ 200 mK). In 1979, ammonia was irradiated with radiations to form NH 2 free radicals, resulting in the achievement of a high polarization degree of greater than 90 percent (hydrogen). Since then, ammonia and deutron ammonia have increasingly been replacing alcohols including butanol. Irradiation of a target substance with radiations destroys the structure of the substance, leading to a decrease in polarization degree. However, ammonia produces unpaired electrons as a result of irradiation, allowing it to be highly resistant to radiation. This report also present some study results, including observations on effects of radiation on the polarization degree of a target, effects of annealing, and polarization of 14 N. A process for producing an ammonia target is also described. (Nogami, K.)

  6. A Si nanocube array polarizer

    Science.gov (United States)

    Chen, Linghua; Jiang, Yingjie; Xing, Li; Yao, Jun

    2017-10-01

    We have proposed a full dielectric (silicon) nanocube array polarizer based on a silicon dioxide substrate. Each polarization unit column includes a plurality of equal spaced polarization units. By optimizing the length, the width, the height of the polarization units and the center distance of adjacent polarization unit (x direction and y direction), an extinction ratio (ER) of higher than 25dB was obtained theoretically when the incident light wavelength is 1550nm. while for applications of most polarization optical elements, ER above 10dB is enough. With this condition, the polarizer we designed can work in a wide wavelength range from 1509.31nm to 1611.51nm. Compared with the previous polarizer, we have introduced a polarizer which is a full dielectric device, which solves the problems of low efficiency caused by Ohmic loss and weak coupling. Furthermore, compared with the existing optical polarizers, our polarizer has the advantages of thin thickness, small size, light weight, and low processing difficulty, which is in line with the future development trend of optical elements.

  7. Polarization: A must for fusion

    Directory of Open Access Journals (Sweden)

    Didelez J.-P.

    2013-11-01

    Full Text Available The complete polarization of DT fuel would increase the fusion reactivity by 50% in magnetic as well as in inertial confinements. The persistence of polarization in a fusion process could be tested, using a terawatt laser hitting a polarized HD target. The polarized deuterons heated in the plasma induced by the laser can fuse producing a 3He and a neutron in the final state. The angular distribution of the emitted neutrons and the change in the corresponding total Cross Section (CS can sign the polarization persistence. The polarization of solid H2, D2 or T2 Hydrogen isotopes is very difficult. However, it has been possible to polarize HD, a hetero-molecular form of Hydrogen, by static polarization, at very low temperature and very high field. The radioactivity of DT molecules forbids there high polarization by the static method, therefore one has to develop the Dynamic Nuclear Polarization (DNP by RF transitions. The DNP of HD has been investigated in the past. The magnetic properties of HD and DT molecules are very similar, it is therefore expected that any polarization result obtained with HD could be extrapolated to DT.

  8. Elite Polarization and Public Opinion

    DEFF Research Database (Denmark)

    Robison, Joshua; Mullinix, Kevin

    2016-01-01

    Elite polarization has reshaped American politics and is an increasingly salient aspect of news coverage within the United States. As a consequence, a burgeoning body of research attempts to unravel the effects of elite polarization on the mass public. However, we know very little about how...... polarization is communicated to the public by news media. We report the results of one of the first content analyses to delve into the nature of news coverage of elite polarization. We show that such coverage is predominantly critical of polarization. Moreover, we show that unlike coverage of politics focused...... on individual politicians, coverage of elite polarization principally frames partisan divisions as rooted in the values of the parties rather than strategic concerns. We build on these novel findings with two survey experiments exploring the influence of these features of polarization news coverage on public...

  9. The polarization of fast neutrons

    International Nuclear Information System (INIS)

    Talov, V.V.

    2001-01-01

    It is insufficient to know coordinates and momentum to describe a state of a neutron. It is necessary to define a spin orientation. As far as it is known from quantum mechanics, a half spin has a projection in the positive direction or in the negative direction. The probability of both projections in an unpolarized beam is equal. If a direction exists, in which the projection is more probably then beam is called polarized in this direction. It is essential to know polarization of neutrons for characteristics of a neutron source, which is emitting it. The question of polarization of fast neutrons came up in 50's. The present work is the review of polarization of fast neutrons and methods of polarization analysis. This also includes information about polarization of fast neutrons from first papers, which described polarization in the D(d,n) 3 He, 7 Li (p,n) 7 Be, T(p,n) 3 He reactions. (authors)

  10. Military Construction, Military Quality of Life and Veterans Affairs: FY2007 Appropriations

    National Research Council Canada - National Science Library

    Else, Daniel H; Scott, Christine; Panangala, Sidath V

    2007-01-01

    ... construction, military housing allowances, military installation maintenance and operation, the Department of Veterans Affairs, and other veteran-related agencies, rested in the House Committee...

  11. Developing public affairs counseling skills to support a public participation focus at Fernald

    Energy Technology Data Exchange (ETDEWEB)

    Hoopes, J. [Fernald Environmental Restoration Management Corp., Cincinnati, OH (United States)

    1994-03-01

    To provide closer coordination between the Public Affairs Division and environmental restoration management and technical staff, the Fernald Environmental Restoration Management Corporation (FERMCO) matrixed Public Affairs staffers as counselors to project teams within FERMCO. Close coordination between technical staff and public affairs staff is essential for effective public communication in a public participation, environmental risk communication environment. Two-way symmetrical communication (public participation) represents a paradigm shift for public affairs staff who have developed skills primarily in a public information (asymmetrical communication) environment. While there has been much focus in the literature and workshops on management changes needed to support a public participation environment, less attention has been paid to identifying and developing the skills needed by public affairs professionals to support public participation. To support the new counseling role of public affairs staffers, FERMCO used a public affairs training consultant to design and deliver a workshop to initiate development of the skills needed for the public affairs counseling role. This paper describes FERMCO`s matrixed counseling program and the training to develop public affairs counseling skills for the public participation environment.

  12. 75 FR 30687 - Organization; Eligibility and Scope of Financing; Funding and Fiscal Affairs, Loan Policies and...

    Science.gov (United States)

    2010-06-02

    ...; Eligibility and Scope of Financing; Funding and Fiscal Affairs, Loan Policies and Operations, and Funding... INFORMATION CONTACT: Elna Luopa, Senior Corporate Analyst, Office of Regulatory Policy, Farm Credit...

  13. Knox named Phoenix associate dean of faculty affairs

    Directory of Open Access Journals (Sweden)

    Robbins RA

    2016-12-01

    Full Text Available No abstract available. Article truncated after 150 words. The University of Arizona College of Medicine-Phoenix has announced the appointment of nationally recognized physician-scientist Kenneth S. Knox, MD, as the associate dean of faculty affairs. Dr. Knox who has been at the University of Arizona-Tucson since 2008, will oversee the Faculty Affairs Office whose charge is to promote an engaged, diverse community of faculty and scholars that sustain a culture of engagement, professionalism and inclusion. He also will serve as director of research at the Banner Lung Institute. Dr. Knox is a pulmonologist known for his research in sarcoidosis, fungal diagnostics and immunologic lung disease. His work includes developing treatments for HIV, AIDS and valley fever. The division chief of Pulmonary, Allergy, Critical Care and Sleep Medicine in Tucson, Knox was responsible for dramatic growth. His accomplishments include increasing the number of clinical and basic science faculty from five to 30 and fellowship trainings from six to 20, rekindling …

  14. On the Teaching of Science, Technology and International Affairs.

    Science.gov (United States)

    Weiss, Charles

    2012-03-01

    Despite the ubiquity and critical importance of science and technology in international affairs, their role receives insufficient attention in traditional international relations curricula. There is little literature on how the relations between science, technology, economics, politics, law and culture should be taught in an international context. Since it is impossible even for scientists to master all the branches of natural science and engineering that affect public policy, the learning goals of students whose primary training is in the social sciences should be to get some grounding in the natural sciences or engineering, to master basic policy skills, to understand the basic concepts that link science and technology to their broader context, and to gain a respect for the scientific and technological dimensions of the broader issues they are addressing. They also need to cultivate a fearless determination to master what they need to know in order to address policy issues, an open-minded but skeptical attitude towards the views of dueling experts, regardless of whether they agree with their politics, and (for American students) a world-view that goes beyond a strictly U.S. perspective on international events. The Georgetown University program in Science, Technology and International Affairs (STIA) is a unique, multi-disciplinary undergraduate liberal arts program that embodies this approach and could be an example that other institutions of higher learning might adapt to their own requirements.

  15. Teratology Public Affairs Committee position paper: maternal obesity and pregnancy.

    Science.gov (United States)

    Scialli, Anthony R

    2006-02-01

    Compared to normal-weight women, obese women have an increased risk of infertility and pregnancy complications. The most consistently described pregnancy complications are hypertensive disorders, gestational diabetes mellitus, thromboembolic events, and cesarean section. Fetal and neonatal complications may include congenital malformations, macrosomia, and shoulder dystocia. The literature suggests that women with a body mass index (BMI) >or=30 have approximately double the risk of having a child with a neural tube defect (NTD) compared to normal-weight women, and the increased risk associated with higher maternal body weight does not appear to be modified by folic acid supplementation. The Public Affairs Committee of the Teratology Society supports the public health initiatives identified by the U.S. Food and Drug Administration in 2004 and the research initiatives identified by the National Institutes of Health in 2004. The Public Affairs Committee recommends that clinicians counsel women about appropriate caloric intake and exercise and that health-care providers educate parents about appropriate childhood nutrition. Breast-feeding should be encouraged based on evidence of a protective effect against childhood obesity, as well as other health advantages. Birth Defects Research (Part A), 2006. (c) 2006 Wiley-Liss, Inc.

  16. Coronal Polarization of Pseudostreamers and the Solar Polar Field Reversal

    Science.gov (United States)

    Rachmeler, L. A.; Guennou, C.; Seaton, D. B.; Gibson, S. E.; Auchere, F.

    2016-01-01

    The reversal of the solar polar magnetic field is notoriously hard to pin down due to the extreme viewing angle of the pole. In Cycle 24, the southern polar field reversal can be pinpointed with high accuracy due to a large-scale pseudostreamer that formed over the pole and persisted for approximately a year. We tracked the size and shape of this structure with multiple observations and analysis techniques including PROBA2/SWAP EUV images, AIA EUV images, CoMP polarization data, and 3D tomographic reconstructions. We find that the heliospheric field reversed polarity in February 2014, whereas in the photosphere, the last vestiges of the previous polar field polarity remained until March 2015. We present here the evolution of the structure and describe its identification in the Fe XII 1074nm coronal emission line, sensitive to the Hanle effect in the corona.

  17. System for measuring the proton polarization in a polarized target

    International Nuclear Information System (INIS)

    Karnaukhov, I.M.; Lukhanin, A.A.; Telegin, Yu.N.; Trotsenko, V.I.; Chechetenko, V.F.

    1984-01-01

    The system for measuring the proton polarization in a polarized target representing the high-sensitivity nuclear magnetic resonance (NMR) is described Q-meter with series connection and a circuit for measuring system resonance characteristic is used for NMR-absorption signal recording. Measuring coil is produced of a strip conductor in order to obtain uniform system sensitivity to polarization state in all target volume and improve signal-to-noise ratio. Polarization measuring system operates ion-line with the M-6000 computer. The total measuring error for the value of free proton polarization in target taking into account the error caused by local depolarization of working substance under irradiation by high-intense photon beam is <= 6%. Long-term application of the described system for measuring the proton polarization in the LUEh-20000 accelerator target used in the pion photoproduction experiments has demonstrated its high reliability

  18. Circularly polarized antennas

    CERN Document Server

    Gao, Steven; Zhu, Fuguo

    2013-01-01

    This book presents a comprehensive insight into the design techniques for different types of CP antenna elements and arrays In this book, the authors address a broad range of topics on circularly polarized (CP) antennas. Firstly, it introduces to the reader basic principles, design techniques and characteristics of various types of CP antennas, such as CP patch antennas, CP helix antennas, quadrifilar helix antennas (QHA), printed quadrifilar helix antennas (PQHA), spiral antenna, CP slot antennas, CP dielectric resonator antennas, loop antennas, crossed dipoles, monopoles and CP horns. Adva

  19. Spin-polarized SEM

    International Nuclear Information System (INIS)

    Konoto, Makoto

    2007-01-01

    Development of highly effective evaluation technology of magnetic structures on a nanometric scale is a key to understanding spintronics and related phenomena. A high-resolution spin-polarized scanning electron microscope (spin SEM) developed recently is quite suitable for probing such nanostructures because of the capability of analyzing local magnetization vectors in three dimensions. Utilizing the spin SEM, a layered antiferromagnetic structure with the 1nm-alternation of bilayer-sheet magnetization has been successfully resolved. The real-space imaging with full analysis of the temperature-dependent magnetization vectors will be demonstrated. (author)

  20. Polarization recovery through scattering media.

    Science.gov (United States)

    de Aguiar, Hilton B; Gigan, Sylvain; Brasselet, Sophie

    2017-09-01

    The control and use of light polarization in optical sciences and engineering are widespread. Despite remarkable developments in polarization-resolved imaging for life sciences, their transposition to strongly scattering media is currently not possible, because of the inherent depolarization effects arising from multiple scattering. We show an unprecedented phenomenon that opens new possibilities for polarization-resolved microscopy in strongly scattering media: polarization recovery via broadband wavefront shaping. We demonstrate focusing and recovery of the original injected polarization state without using any polarizing optics at the detection. To enable molecular-level structural imaging, an arbitrary rotation of the input polarization does not degrade the quality of the focus. We further exploit the robustness of polarization recovery for structural imaging of biological tissues through scattering media. We retrieve molecular-level organization information of collagen fibers by polarization-resolved second harmonic generation, a topic of wide interest for diagnosis in biomedical optics. Ultimately, the observation of this new phenomenon paves the way for extending current polarization-based methods to strongly scattering environments.

  1. Peculiarities of annihilation of polarized positronium in polarized media

    International Nuclear Information System (INIS)

    Silenko, A.Ya.

    2005-01-01

    Features of positronium annihilation (PA) in polarized media are investigated. Strong exchange interaction with nonpaired electrons of paramagnetic atoms essentially accelerates the PA in comparison with annihilation of free positrons. The value of the spin projection on the direction of polarized nonpaired electrons has essential effect on the orthopositronium lifetime and on the width of the gamma spectrum annihilation line. It is shown that these features of PA permit to use it for studying the paramagnetic polarization [ru

  2. Polar ring galaxies in the Galaxy Zoo

    Science.gov (United States)

    Finkelman, Ido; Funes, José G.; Brosch, Noah

    2012-05-01

    We report observations of 16 candidate polar-ring galaxies (PRGs) identified by the Galaxy Zoo project in the Sloan Digital Sky Survey (SDSS) data base. Deep images of five galaxies are available in the SDSS Stripe82 data base, while to reach similar depth we observed the remaining galaxies with the 1.8-m Vatican Advanced Technology Telescope. We derive integrated magnitudes and u-r colours for the host and ring components and show continuum-subtracted Hα+[N II] images for seven objects. We present a basic morphological and environmental analysis of the galaxies and discuss their properties in comparison with other types of early-type galaxies. Follow-up photometric and spectroscopic observations will allow a kinematic confirmation of the nature of these systems and a more detailed analysis of their stellar populations.

  3. Polarized tagged photons

    International Nuclear Information System (INIS)

    Maximon, L.C.; Ganz, Eric; Aniel, Thierry; Miniac, Arlette de.

    1982-03-01

    We consider in detail the differential cross section for polarized bremsstrahlung for angles and energies in the range of interest for a tagging system and derive a high energy, small angle approximation for this cross section. We use these approximations to determine the maxima and minima of the cross sections for these two polarization states, dσperpendicular and dσparallel, and to evaluate these cross sections at the extrema. It is shown that both dσperpendicular and dσparallel have a very sharp dip in the region of small momentum transfers. However, their behavior in the region of the dip, as a function of the azimuthal angle phi, is quite different over most of the photon spectrum. The cross section dσperpendicular behaves similarly to the cross section for unpolarized photons in that as phi increases, the sharp dip vanishes, the minimum fuses with the second maximum, and the cross section then has only a single maximum. In contrast, the sharp dip in the cross section dσparallel remains as phi increases. Coulomb corrections to the Born approximation are considered, and do not fill in these dips

  4. Career Progression Impact on Active and Reserve Component Civil Affairs Officer and Enlisted Soldiers as a Result of a Civil Affairs Capabilities Restructuring within the Army

    National Research Council Canada - National Science Library

    Edmonds, Johnnie

    2004-01-01

    .... Since 96 percent of the Army's Civil Affairs structure and capabilities reside in the Army Reserve, the problems of access, operational tempo, and responsiveness have created a new requirement...

  5. Spin exchange in polarized deuterium

    International Nuclear Information System (INIS)

    Przewoski, B. von; Meyer, H.O.; Balewski, J.; Doskow, J.; Ibald, R.; Pollock, R.E.; Rinckel, T.; Wellinghausen, A.; Whitaker, T.J.; Daehnick, W.W.; Haeberli, W.; Schwartz, B.; Wise, T.; Lorentz, B.; Rathmann, F.; Pancella, P.V.; Saha, Swapan K.; Thoerngren-Engblom, P.

    2003-01-01

    We have measured the vector and tensor polarization of an atomic deuterium target as a function of the target density. The polarized deuterium was produced in an atomic beam source and injected into a storage cell. For this experiment, the atomic beam source was operated without rf transitions, in order to avoid complications from the unknown efficiency of these transitions. In this mode, the atomic beam is vector and tensor polarized and both polarizations can be measured simultaneously. We used a 1.2-cm-diam and 27-cm-long storage cell, which yielded an average target density between 3 and 9x10 11 at/cm 3 . We find that the tensor polarization decreases with increasing target density while the vector polarization remains constant. The data are in quantitative agreement with the calculated effect of spin exchange between deuterium atoms at low field

  6. High energy polarized electron beams

    International Nuclear Information System (INIS)

    Rossmanith, R.

    1987-01-01

    In nearly all high energy electron storage rings the effect of beam polarization by synchrotron radiation has been measured. The buildup time for polarization in storage rings is of the order of 10 6 to 10 7 revolutions; the spins must remain aligned over this time in order to avoid depolarization. Even extremely small spin deviations per revolution can add up and cause depolarization. The injection and the acceleration of polarized electrons in linacs is much easier. Although some improvements are still necessary, reliable polarized electron sources with sufficiently high intensity and polarization are available. With the linac-type machines SLC at Stanford and CEBAF in Virginia, experiments with polarized electrons will be possible

  7. Polarized proton collider at RHIC

    International Nuclear Information System (INIS)

    Alekseev, I.; Allgower, C.; Bai, M.; Batygin, Y.; Bozano, L.; Brown, K.; Bunce, G.; Cameron, P.; Courant, E.; Erin, S.; Escallier, J.; Fischer, W.; Gupta, R.; Hatanaka, K.; Huang, H.; Imai, K.; Ishihara, M.; Jain, A.; Lehrach, A.; Kanavets, V.; Katayama, T.; Kawaguchi, T.; Kelly, E.; Kurita, K.; Lee, S.Y.; Luccio, A.; MacKay, W.W.; Mahler, G.; Makdisi, Y.; Mariam, F.; McGahern, W.; Morgan, G.; Muratore, J.; Okamura, M.; Peggs, S.; Pilat, F.; Ptitsin, V.; Ratner, L.; Roser, T.; Saito, N.; Satoh, H.; Shatunov, Y.; Spinka, H.; Syphers, M.; Tepikian, S.; Tominaka, T.; Tsoupas, N.; Underwood, D.; Vasiliev, A.; Wanderer, P.; Willen, E.; Wu, H.; Yokosawa, A.; Zelenski, A.N.

    2003-01-01

    In addition to heavy ion collisions (RHIC Design Manual, Brookhaven National Laboratory), RHIC will also collide intense beams of polarized protons (I. Alekseev, et al., Design Manual Polarized Proton Collider at RHIC, Brookhaven National Laboratory, 1998, reaching transverse energies where the protons scatter as beams of polarized quarks and gluons. The study of high energy polarized protons beams has been a long term part of the program at BNL with the development of polarized beams in the Booster and AGS rings for fixed target experiments. We have extended this capability to the RHIC machine. In this paper we describe the design and methods for achieving collisions of both longitudinal and transverse polarized protons in RHIC at energies up to √s=500 GeV

  8. Linear polarization of BY Draconis

    International Nuclear Information System (INIS)

    Koch, R.H.; Pfeiffer, R.J.

    1976-01-01

    Linear polarization measurements are reported in four bandpasses for the flare star BY Dra. The red polarization is intrinsically variable at a confidence level greater than 99 percent. On a time scale of many months, the variability is not phase-locked to either a rotational or a Keplerian ephemeris. The observations of the three other bandpasses are useful principally to indicate a polarization spectrum rising toward shorter wavelengths

  9. Polarity in Mammalian Epithelial Morphogenesis

    OpenAIRE

    Roignot, Julie; Peng, Xiao; Mostov, Keith

    2013-01-01

    Cell polarity is fundamental for the architecture and function of epithelial tissues. Epithelial polarization requires the intervention of several fundamental cell processes, whose integration in space and time is only starting to be elucidated. To understand what governs the building of epithelial tissues during development, it is essential to consider the polarization process in the context of the whole tissue. To this end, the development of three-dimensional organotypic cell culture model...

  10. The sensitivity of income polarization

    DEFF Research Database (Denmark)

    Hussain, Azhar

    2009-01-01

    This study looks at polarization and its components' sensitivity to assumptions about equivalence scales, income definition, ethical income distribution parameters, and the income accounting period. A representative sample of Danish individual incomes from 1984 to 2002 is utilised. Results show....... Increasing the accounting period confirms the reduction in inequality found for shorter periods, but polarization is virtually unchanged, because income group identification increases. Applying different equivalence scales does not change polarization ranking for different years, but identification ranks...

  11. Polarized Electrons for Linear Colliders

    International Nuclear Information System (INIS)

    Clendenin, J.

    2004-01-01

    Future electron-positron linear colliders require a highly polarized electron beam with a pulse structure that depends primarily on whether the acceleration utilizes warm or superconducting rf structures. The International Linear Collider (ILC) will use cold structures for the main linac. It is shown that a dc-biased polarized photoelectron source such as successfully used for the SLC can meet the charge requirements for the ILC micropulse with a polarization approaching 90%

  12. 8 December 2011 - Kingdom of Lesotho Deputy Prime Minister and Minister of Home Affairs and Public Safety, and of Parliamentary Affairs A. Lesao Lehohla signing the guest book with Adviser R. Voss and in the ATLAS visitor centre.

    CERN Multimedia

    VMO Team

    2011-01-01

    8 December 2011 - Kingdom of Lesotho Deputy Prime Minister and Minister of Home Affairs and Public Safety, and of Parliamentary Affairs A. Lesao Lehohla signing the guest book with Adviser R. Voss and in the ATLAS visitor centre.

  13. 32 CFR 705.36 - Government transportation of civilians for public affairs purposes.

    Science.gov (United States)

    2010-07-01

    ....36 Government transportation of civilians for public affairs purposes. (a) General policy. (1... Assistant Secretary of Defense (Public Affairs), as appropriate. (8) Point to point transportation within... 32 National Defense 5 2010-07-01 2010-07-01 false Government transportation of civilians for...

  14. Development of Effective Academic Affairs Administration System in Thai Primary Schools

    Science.gov (United States)

    Thongnoi, Niratchakorn; Srisa-ard, Boonchom; Sri-ampai, Anan

    2013-01-01

    This research aimed to: 1) study current situations and problems of academic affairs administration system in Primary Schools. 2) develop an effective academic affairs administration system, and 3) evaluate the implementation of the developed system in the primary school, Thailand. Research and Development (R&D) was employed which consisted of…

  15. 76 FR 71797 - Federal Agricultural Mortgage Corporation Funding and Fiscal Affairs; Farmer Mac Investments and...

    Science.gov (United States)

    2011-11-18

    ... diligence procedures that are required for investments, but we do not intend to change the fundamental... Federal Agricultural Mortgage Corporation Funding and Fiscal Affairs; Farmer Mac Investments and Liquidity... Mortgage Corporation Funding and Fiscal Affairs; Farmer Mac Investments and Liquidity Management AGENCY...

  16. Women in Student Affairs: Navigating the Roles of Mother and Administrator

    Science.gov (United States)

    Bailey, Krista Jorge

    2011-01-01

    The purpose of this study was to understand the experiences of women who have children and work in mid-level student affairs positions. The study of this phenomenon was driven by four problems: (a) women face barriers in rising to upper-level leadership positions, (b) women are more likely than men to leave the field of student affairs, (c) there…

  17. A reading list for practitioners and scholars of student affairs in Africa

    African Journals Online (AJOL)

    Journal of Student Affairs in Africa | Volume 3(2) 2015, 65–68 | 2307-6267 ... Campus crisis management: A comprehensive guide to planning, prevention, response, ... ACPA Statement of Ethical Principles and Standards. ... (Note: Though this text is geared for student affairs professionals at faith-based institutions, it has.

  18. 25 CFR 225.36 - Minerals agreement cancellation; Bureau of Indian Affairs notice of noncompliance.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Minerals agreement cancellation; Bureau of Indian Affairs... INTERIOR ENERGY AND MINERALS OIL AND GAS, GEOTHERMAL, AND SOLID MINERALS AGREEMENTS Minerals Agreements § 225.36 Minerals agreement cancellation; Bureau of Indian Affairs notice of noncompliance. (a) If the...

  19. Revitalizing Rural Washington: Report and Recommendations of the Governor's Task Force on Rural Affairs.

    Science.gov (United States)

    Governor's Task Force on Rural Affairs, Olympia, WA.

    Recognizing that urban and rural problems are interconnected, the Governor's Advisory Council on Urban Affairs (State of Washington), made a recommendation that led to formation (in 1970) of the Task Force on Rural Affairs. The report of that task force identifies the continuing technological revolution in agriculture as an important cause of (1)…

  20. Factors Influencing Student Affairs Professionals' Attainment of Professional Competencies

    Science.gov (United States)

    Muller, Kristyn; Grabsch, Dustin; Moore, Lori

    2018-01-01

    Limited research exists that examines factors influencing student affairs professionals' attainment of the professional competencies that are expected of them. The study described in this article analyzed student affairs professionals' survey responses to determine which demographics, pre-professional experiences, and educational experiences…

  1. James Edward Scott: The Leadership Journey of a Senior-Level African American Student Affairs Officer

    Science.gov (United States)

    Willis, Salatha T.

    2013-01-01

    The purpose of this study was to examine, understand, and describe the life, leadership, and influence of Dr. James Edward Scott on higher education and more specifically student affairs; as one of the most well-known and respected African American male chief student affairs officers in the late 20th and early 21st centuries. Using a qualitative…

  2. Facing a "New" Challenge: Chief Student Affairs Officers' Responses to Casino Gambling in Mississippi.

    Science.gov (United States)

    Bailey, E. Ann; Dickens, Cynthia S.

    1997-01-01

    Reports on a qualitative study examining chief student affairs officers' (CSAOs) (N=30) perceptions of the impact of legalized casino gambling on student life, service delivery, and student affairs. Results indicate that CSAOs detected few changes in student behavior. Campuses close to casinos reported more dropouts and increases in student debt.…

  3. The Purpose of a Student Affairs Preparation Program within Jesuit Higher Education

    Science.gov (United States)

    Stringer, Jeremy; Swezey, Erin

    2006-01-01

    This article addresses the congruence of a student affairs professional preparation program within Jesuit higher education. It connects the mission of Jesuit education and Jesuit religious and educational principles to the philosophy of student affairs work in colleges and universities. A program in student development administration at Seattle…

  4. The Role of the Chief Student Affairs Officer in Promoting the Jesuit Mission of the University

    Science.gov (United States)

    Reiter, Lisa Rose

    2012-01-01

    "The Role of the Chief Student Affairs Officer in Promoting the Jesuit Mission of the University" is a qualitative comparative case study of three lay (non-cleric, non-Jesuit) chief student affairs officers employed in three U.S. Jesuit higher educational institutions. As the number of Jesuits decreases, a significant question is how the…

  5. The Invisible Reality of Whiteness: An Examination of Whiteness in Jesuit Higher Education Student Affairs

    Science.gov (United States)

    Schmitz, Diane Shirley

    2009-01-01

    The purpose of this study was to promote an ethic of care and justice through the examination of the manifestations of whiteness within student affairs on a Jesuit Catholic university campus. To achieve this purpose a qualitative, exploratory case study was used to examine a student affairs division at Western Jesuit University (pseudonym), an…

  6. A Historical Perspective on Student Affairs Professionals' Use of Digital Technology

    Science.gov (United States)

    Cabellon, Edmund T.; Payne-Kirchmeier, Julie

    2016-01-01

    This chapter provides a historical perspective of student affairs professionals' use of digital and social technologies in their work on college campuses. The purpose of the chapter is to describe how digital technology tools have evolved since 2005, demonstrate how student affairs technology shifted and changed during this time, and shape student…

  7. Exploring the Culture of Assessment within a Division of Student Affairs

    Science.gov (United States)

    Julian, Nessa Duque

    2013-01-01

    The growing calls for accountability within higher education have mobilized student affairs divisions to develop practices that provide evidence of student learning and development. In order to do this effectively student affairs divisions understand the importance of creating, managing, and sustaining a culture of assessment. The purpose of this…

  8. 76 FR 21786 - Meetings of The United States-Peru Environmental Affairs Council, Environmental Cooperation...

    Science.gov (United States)

    2011-04-18

    ... DEPARTMENT OF STATE [Public Notice: 7417] Meetings of The United States-Peru Environmental Affairs... of meetings of the United States-Peru Environmental Affairs Council, Environmental Cooperation... notice that the United States and Peru intend to hold the third meeting of the Sub-Committee on Forest...

  9. 75 FR 5836 - Meeting of the United States-Peru Environmental Affairs Council

    Science.gov (United States)

    2010-02-04

    ... DEPARTMENT OF STATE [Public Notice: 6889] Meeting of the United States-Peru Environmental Affairs Council ACTION: Notice of the meeting of the U.S.-Peru Environmental Affairs Council and request for...) are providing notice that the United States and Peru intend to hold the first meeting of the...

  10. 78 FR 32529 - Meeting of the United States-Peru Environmental Affairs Council and Environmental Cooperation...

    Science.gov (United States)

    2013-05-30

    ... DEPARTMENT OF STATE [Public Notice 8339] Meeting of the United States-Peru Environmental Affairs Council and Environmental Cooperation Commission ACTION: Notice of meetings of the United States-Peru... the United States and Peru intend to hold the fourth meeting of the Environmental Affairs Council (the...

  11. 77 FR 28419 - Meetings of the United States-Peru Environmental Affairs Council, Environmental Cooperation...

    Science.gov (United States)

    2012-05-14

    ... DEPARTMENT OF STATE [Public Notice: 7873] Meetings of the United States-Peru Environmental Affairs... of meetings of the United States-Peru Environmental Affairs Council, Environmental Cooperation... the United States and Peru intend to hold the fifth meeting of the Sub-Committee on Forest Sector...

  12. Attrition from Student Affairs: Perspectives from Those Who Exited the Profession

    Science.gov (United States)

    Marshall, Sarah M.; Gardner, Megan Moore; Hughes, Carole; Lowery, Ute

    2016-01-01

    Attrition of student affairs professionals is an issue of concern for the profession. This mixed methods study highlights reasons why participants left their student affairs careers. Seven general themes emerged from the study, including burnout, salary issues, career alternatives, work/family conflict, limited advancement, supervisor issues and…

  13. 76 FR 16029 - 60-Day Notice of Proposed Information Collection: Bureau of Educational and Cultural Affairs...

    Science.gov (United States)

    2011-03-22

    ... Cultural Affairs, Office of Policy and Evaluation, Evaluation Division: Sports & Culture Evaluation Envoys... larger Sports and Culture Evaluation to conduct a survey of the envoys who participated in the Sports... of Educational and Cultural Affairs, Office of Policy and Evaluation, Evaluation Division: Sports...

  14. 76 FR 16030 - 60-Day Notice of Proposed Information Collection: Bureau of Educational and Cultural Affairs...

    Science.gov (United States)

    2011-03-22

    ... and Cultural Affairs, Office of Policy and Evaluation, Evaluation Division: Sports & Culture... collection clearance will allow ECA/P/V as part of their larger Sports and Culture Evaluation to conduct a... of Educational and Cultural Affairs, Office of Policy and Evaluation, Evaluation Division: Sports...

  15. 76 FR 16032 - 60-Day Notice of Proposed Information Collection: Bureau of Educational and Cultural Affairs...

    Science.gov (United States)

    2011-03-22

    ... Cultural Affairs, Office of Policy and Evaluation, Evaluation Division: Sports & Culture Evaluation IWP... collection clearance will allow ECA/P/V as part of their larger Sports and Culture Evaluation to conduct a... of Educational and Cultural Affairs, Office of Policy and Evaluation, Evaluation Division: Sports...

  16. 76 FR 16033 - 60-Day Notice of Proposed Information Collection: Bureau of Educational and Cultural Affairs...

    Science.gov (United States)

    2011-03-22

    ... Cultural Affairs, Office of Policy and Evaluation, Evaluation Division: Sports & Culture Evaluation BTL... larger Sports and Culture Evaluation to conduct a survey of exchange participants who participated in the... of Educational and Cultural Affairs, Office of Policy and Evaluation, Evaluation Division: Sports...

  17. The Impact of Mentoring on the Ascension of Senior Student Affairs Officers to the College Presidency

    Science.gov (United States)

    Hamluk, Brian Frederick

    2014-01-01

    In comparison to other backgrounds of college and university presidents (e.g., chief academic officers, finance, institutional advancement, etc.) few presidents in American higher education achieve the presidency from a senior-level position within student affairs, and mentoring of senior student affairs officers may play a role in assisting them…

  18. Advocating for Standards in Student Affairs Departments in African Institutions: University of Botswana Experience

    Science.gov (United States)

    Pansiri, Barbra M.; Sinkamba, Refilwe P.

    2017-01-01

    The Student Affairs Departments have seen immense growth over the years, from a discourse which had no academic relevance in higher education, to that which is expected to add value to the attraction, retention, and graduation of students. However, the latest developments have seen the role of Student Affairs Departments grow from "in-loco…

  19. The Development, Validity, and Reliability of a Psychometric Instrument Measuring Competencies in Student Affairs

    Science.gov (United States)

    Sriram, Rishi

    2014-01-01

    The study of competencies in student affairs began more than 4 decades ago, but no instrument currently exists to measure competencies broadly. This study builds upon previous research by developing an instrument to measure student affairs competencies. Results not only validate the competencies espoused by NASPA and ACPA, but also suggest adding…

  20. Toward a History of Student Affairs: A Synthesis of Research, 1996-2015

    Science.gov (United States)

    Hevel, Michael S.

    2016-01-01

    This article offers a synthesis of over 40 journal articles, book chapters, and books related to the history of student affairs published since 1996. Within this literature, scholars have explored the roles and responsibilities of early student affairs administrators ("positions and practice"), demonstrated efforts to establish a…

  1. What Institutional Websites Reveal about Diversity-Related Partnerships between Academic and Student Affairs

    Science.gov (United States)

    LePeau, Lucy A.; Hurtado, Sarah S.; Davis, Ryan J.

    2018-01-01

    Little is understood about how campus educators within Academic Affairs and Student Affairs use institutional websites to articulate what their institutional commitments to diversity, inclusion, and social justice are and how they are enacted. Through an exploratory content analysis using LePeau's (2015) framework on pathways to partnership (i.e.,…

  2. 39 CFR 3002.15 - Office of Public Affairs and Governmental Relations. [Reserved

    Science.gov (United States)

    2010-07-01

    ... 39 Postal Service 1 2010-07-01 2010-07-01 false Office of Public Affairs and Governmental Relations. [Reserved] 3002.15 Section 3002.15 Postal Service POSTAL REGULATORY COMMISSION PERSONNEL ORGANIZATION §§ 3002.15 Office of Public Affairs and Governmental Relations. [Reserved] ...

  3. Polar bear attacks on humans: Implications of a changing climate

    Science.gov (United States)

    Wilder, James; Vongraven, Dag; Atwood, Todd C.; Hansen, Bob; Jessen, Amalie; Kochnev, Anatoly A.; York, Geoff; Vallender, Rachel; Hedman, Daryll; Gibbons, Melissa

    2017-01-01

    Understanding causes of polar bear (Ursus maritimus) attacks on humans is critical to ensuring both human safety and polar bear conservation. Although considerable attention has been focused on understanding black (U. americanus) and grizzly (U. arctos) bear conflicts with humans, there have been few attempts to systematically collect, analyze, and interpret available information on human-polar bear conflicts across their range. To help fill this knowledge gap, a database was developed (Polar Bear-Human Information Management System [PBHIMS]) to facilitate the range-wide collection and analysis of human-polar bear conflict data. We populated the PBHIMS with data collected throughout the polar bear range, analyzed polar bear attacks on people, and found that reported attacks have been extremely rare. From 1870–2014, we documented 73 attacks by wild polar bears, distributed among the 5 polar bear Range States (Canada, Greenland, Norway, Russia, and United States), which resulted in 20 human fatalities and 63 human injuries. We found that nutritionally stressed adult male polar bears were the most likely to pose threats to human safety. Attacks by adult females were rare, and most were attributed to defense of cubs. We judged that bears acted as a predator in most attacks, and that nearly all attacks involved ≤2 people. Increased concern for both human and bear safety is warranted in light of predictions of increased numbers of nutritionally stressed bears spending longer amounts of time on land near people because of the loss of their sea ice habitat. Improved conflict investigation is needed to collect accurate and relevant data and communicate accurate bear safety messages and mitigation strategies to the public. With better information, people can take proactive measures in polar bear habitat to ensure their safety and prevent conflicts with polar bears. This work represents an important first step towards improving our understanding of factors influencing

  4. A polarized alkali ion source

    International Nuclear Information System (INIS)

    Boettger, R.; Tungate, G.; Bauer, B.; Egelhof, P.; Moebius, K.H.; Steffens, E.

    1978-01-01

    The beam foil technique has been applied to detect nuclear vector polarization of a 10 keV 23 Na + beam. The result was about 70% of the atomic beam polarization thus limiting the depolarization by the surface ionizer to at most 30%. In a Coulomb excitation experiment with a tensor polarized 42 MeV 23 Na 7+ beam an effect of 0.011 +- 0.003 was measured yielding a value of t 20 approx. 0.04 for the beam polarization. The depolarization during the acceleration process can be estimated to be about 0.8. (orig.) [de

  5. Polarization preservation in the AGS

    International Nuclear Information System (INIS)

    Ratner, L.G.

    1983-01-01

    The successful operation of a high energy polarized beam at the Argonne Zero Gradient Synchrotron (ZGS) with the concommitant development of depolarizing resonance correction techniques has led to the present project of commissioning such a beam at the Brookhaven Alternating Gradient Synchrotron (AGS). A description of the project was presented at the 1981 National Accelerator Conference. I would like to now present a more detailed description of how we plan to preserve the polarization during acceleration, and to present our game plan for tuning through some 50 resonances and reaching our goal of a 26 GeV polarized proton beam with greater than 60% polarization

  6. Polarization-preserving holey fibers

    DEFF Research Database (Denmark)

    Broeng, Jes; Mogilevtsev, Dmitri; Libori, Stig E. Barkou

    2001-01-01

    In this work we suggest and discuss a microstructure of air capillaries with elliptical cross-section in a tread of glass that gives opportunity for Creation of polarization-preserving fiber with very small beat length between the fundamental modes of different polarization......In this work we suggest and discuss a microstructure of air capillaries with elliptical cross-section in a tread of glass that gives opportunity for Creation of polarization-preserving fiber with very small beat length between the fundamental modes of different polarization...

  7. The SLAC polarized electron source

    International Nuclear Information System (INIS)

    Tang, H.; Alley, R.; Frisch, J.

    1995-06-01

    The SLAC polarized electron source employs a photocathode DC high voltage gun with a loadlock and a YAG pumped Ti:sapphire laser system for colliding beam experiments or a flash lamp pumped Ti:sapphire laser for fixed target experiments. It uses a thin, strained GaAs(100) photocathode, and is capable of producing a pulsed beam with a polarization of ≥80% and a peak current exceeding 10 A. Its operating efficiency has reached 99%. The physics and technology of producing high polarization electron beams from a GaAs photocathode will be reviewed. The prospects of realizing a polarized electron source for future linear colliders will also be discussed

  8. Representation of Refugees, Asylum-Seekers and Refugee Affairs In Hungarian Dailies

    Directory of Open Access Journals (Sweden)

    Lilla VICSEK

    2008-11-01

    Full Text Available How does the press in Hungary write about refugees, asylum-seekers and refugee affairs? We sought to answer this question. Articles appearing in 2005 and 2006 in two leading national Hungarian dailies were examined with quantitative content analysis. The results show that the articles analyzed often treat refugee affairs as an “official” political matter. The high proportion of legislation and political positions conveys the image that refugee affairs are a state or intergovernmental matter, an “official”, legal, political issue rather than for example a humanitarian question. Most of the articles published in both papers write about problems and conflicts in connection with refugee affairs. The negative media image has different significance for different topics. We argue that the question of refugee affairs is a topic where the image shown by the media is of great relevance: the media can be a more important source of information on this subject than personal contacts.

  9. Dynamic nuclear polarization tests in some polymers for polarized targets

    International Nuclear Information System (INIS)

    Brandt, B. van den; Hautle, P.; Konter, J.A.; Mango, S.; Bunyatova, E.I.

    1998-01-01

    The results of dynamic polarization tests in polyethylene (PE) and ethylene propylene copolymer (EPC), doped with the stable free radical 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), are presented. Sizable proton polarizations have been achieved in a magnetic field of 2.5 T at a temperature below 0.3 K and 5T at 1 K

  10. Polar measurements on profiles

    Energy Technology Data Exchange (ETDEWEB)

    Althaus, D.

    1985-03-01

    Wind tunnel models with a profile depth of t=0.5 m were measured in a laminar wind tunnel by the usual measuring processes. The profile resistance was determined by integration along the width of span. The smooth profiles were examined at Re=0.7/1.0 and 1.5 million. At Re=1.0 million, the position of the changeover points were determined with a stethoscope. Also at this Reynolds number measurements were taken with a trip wire of d=2 mm diameter, directly on the profile nose. The tables contain the co-ordinates of the profiles, the contours, the theoretical speed distributions for 4 different angles of attack, the csub(a)-csub(w) polar measurements and changeover points, and the torque coefficients around the t/4 point. (BR).

  11. A Study on the Information Analysis and Legal Affairs

    International Nuclear Information System (INIS)

    Chung, W. S.; Yang, M. H.; Yun, S. W.; Lee, D. S.; Kim, H. R.; Noh, B. C.

    2009-02-01

    It is followed that results and contents of a Study on the Nuclear Information Analyses and Legal Affairs. Our team makes an effort to secure KAERI's best legal interest in the process of enacting nuclear laws and codes, international collaborative study, and management. Moreover, as a international trend analysis, we studied Japan government's position to nuclear energy under the aspect of reducing climate change and supplying sustainable energy. Improvement of Japan's radiation use showed increasing contribution of radiation technology to the people. Results of studies of nuclear policy of Kazakhstan, forecasting global trend in 2030 of Nuclear area, and new U.S. government's policy to nuclear energy are also explained. Lastly, we performed evaluation of source of electric generator which reduce emitting carbon dioxide in the aspect of greenhouse gas emission statistic and tested green gas reducing ability of Korea's green source of electric generator that reducing greenhouse gas effect

  12. Media work as public affairs: moving beyond media savvy

    DEFF Research Database (Denmark)

    Trapp, Leila; Laursen, Bo

    Much research exists which examines how politically-motivated organizations adapt their communication practices to suit the news media’s routines and values to gain media coverage and thereby exert political influence. The mediatization literature describes these adaptation processes as constantly...... evolving, with professional communicators exhibiting an ever-growing amount of media savvy. The purpose of this study is to gain up-to-date insights into current forms of media adaptation in political organizations through interviews with professional press contact staff in 52 Danish interest groups....... The interviews reveal that media work is considered an effective, though potentially risky, form of public affairs. Indeed, media work is said to damage, or even ruin, an organization’s lobbying efforts or relationships with political actors. The study’s key finding is that in order to deal with these risks...

  13. Is There a Role for the BRICS in Asian Affairs

    Directory of Open Access Journals (Sweden)

    Haibin Niu

    2015-05-01

    Full Text Available The BRICS is an important rising force in the current global governance system. Since 2009, the priorities for cooperationamong BRICS members have been reforming the major international financial institutions. In recent years, those prioritieshave extended to include international security and development issues. At the regional level, BRICS leaders have helddialogues with their counterparts in Africa and South America at the Durban and Fortaleza summits respectively. However,the BRICS has not paid much attention to Asian economic issues and security issues in East Asia. This weak and unbalancedagenda towards Asian affairs is unusual considering the importance of Asia to BRICS members and the presence inthe BRICS of of three prominent Asian members with global ambitions. The absence of a strong Asian agenda reflects somedimensions of the BRICS grouping and the region itself. First, the priority of the BRICS countries is to promote their globalstatus, which makes global issues more attractive than regional issues. Second, the Asian members of the BRICS cannotsolve Asian security challenges individually or collectively. Third, as a region, Asia is not a highly integrated similar toAfrica and South America, partly because competitions among major powers including the Asian members of the BRICS.However, the BRICS cannot avoid exploring its influence in shaping Asia’s future considering the region’s rising importanceand challenges. In order to improve their influence in Asia against the background of competing regional institutions andthe renewed interest of the United States in Asia, BRICS countries need to coordinate their individual approaches to Asia,provide more regional public goods by multilateral means, offer either solutions or ideas to regional security issues, and finda more sustainable way to engage with the region.Is There a Role for the BRICS in Asian Affairs

  14. Trichinella and polar bears: a limited risk for humans.

    Science.gov (United States)

    Dupouy-Camet, J; Bourée, P; Yera, H

    2017-07-01

    In this review, we identified 63 cases reported since World War II of human trichinellosis linked to the consumption of parasitized polar bear (Ursus maritimus) meat. This low number contrasts to the numerous cases of human trichinellosis related to consumption of the meat of black (U. americanus) or brown bears (U. arctos). The prevalence of Trichinella infection is high in bears, but larval muscular burden is usually lower in polar bears compared to other bear species. Polar bears, therefore, seem to play a limited role in the transmission of trichinellosis to humans, as native residents living in the Arctic traditionally consume well-cooked bear meat, and travellers and foreign hunters have only limited access to this protected species due to the declining polar bear population.

  15. Measuring political polarization: Twitter shows the two sides of Venezuela

    Science.gov (United States)

    Morales, A. J.; Borondo, J.; Losada, J. C.; Benito, R. M.

    2015-03-01

    We say that a population is perfectly polarized when divided in two groups of the same size and opposite opinions. In this paper, we propose a methodology to study and measure the emergence of polarization from social interactions. We begin by proposing a model to estimate opinions in which a minority of influential individuals propagate their opinions through a social network. The result of the model is an opinion probability density function. Next, we propose an index to quantify the extent to which the resulting distribution is polarized. Finally, we apply the proposed methodology to a Twitter conversation about the late Venezuelan president, Hugo Chávez, finding a good agreement between our results and offline data. Hence, we show that our methodology can detect different degrees of polarization, depending on the structure of the network.

  16. Surgical Excision of Non–Melanoma Skin Cancer in an Elderly Veteran’s Affairs Population

    Directory of Open Access Journals (Sweden)

    C. Malcolm M. Stewart, BS

    2014-12-01

    Conclusions: Although reduction of residual tumor at reexcision is noted with both BCC and even more so with SCC, the rate at which this occurs is not sufficient that a general recommendation to forgo surgical excision can be made.

  17. Climate Drives Polar Bear Origins

    Science.gov (United States)

    In their provocative analysis of northern bears (“Nuclear genomic sequences reveal that polar bears are an old and distinct bear lineage,” Reports, 20 April, p. 344), F. Hailer et al. use independent nuclear loci to show that polar bears originated during the middle Pleistocene, rather than during t...

  18. Study of Jupiter polarization properties

    International Nuclear Information System (INIS)

    Bolkvadze, O.R.

    1980-01-01

    Investigations into polarization properties of the Jupiter reflected light were carried on at the Abastumani astrophysical observatory in 1967, 1968 and 1969 in the four spectral ranges: 4000, 4800, 5400 and 6600 A deg. Data on light polarization in different parts of the Jupiter visible disk are given. Curves of dependence of the planet light polarization degree on a phase angle are plotted. It is shown that in the central part of the visible planet disk the polarization degree is low. Atmosphere is in a stable state in this part of Jupiter. Mean radius of particles of a cloud layer is equal to 0.26μ, and optical thickness of overcloud atmosphere tau=0.05. Height of transition boundary of the cloud layer into overcloud gas atmosphere changes from year to year at the edges of the equatorial zone. Optical thickness of overcloud atmosphere changes also with changing height of a transient layer. The polar Jupiter regions possess a high degree of polarization which depends on a latitude. Polarization increases monotonously with the latitude and over polar regions accepts a maximum value [ru

  19. ARGONNE/ NOVOSIBIRSK: Storing polarized deuterons

    International Nuclear Information System (INIS)

    Anon.

    1990-01-01

    Promising new results come from a collaboration between the Institute of Physics, Novosibirsk, and the US Argonne Laboratory, initiated in 1988 to look at the possibilities for using polarized (spin oriented) gas targets in high current electron storage rings, the object being to maximize target polarization levels

  20. The SLAC polarized electron source

    International Nuclear Information System (INIS)

    Clendenin, J.E.; Alley, R.; Frisch, J.; Kotseroglou, T.; Mulhollan, G.; Schultz, D.; Tang, H.; Turner, J.; Yeremian, A.D.

    1997-08-01

    Since 1992, the SLAC 3-km linac has operated exclusively with polarized electrons. The polarized electron source is highly reliable, remotely operated and monitored, and able to produce a variety of electron bunch profiles for high-energy physics experiments. The source and its operating characteristics are described. Some implications drawn from the operating experience are discussed

  1. UV Coatings, Polarization, and Coronagraphy

    Science.gov (United States)

    Bolcar, Matthew R.; Quijada, Manuel; West, Garrett; Balasubramanian, Bala; Krist, John; Martin, Stefan; Sabatke, Derek

    2016-01-01

    Presenation for the Large UltraViolet Optical Infrared (LUVOIR) and Habitable Exoplanet Imager (HabEx) Science and Technology Definition Teams (STDT) on technical considerations regarding ultraviolet coatings, polarization, and coronagraphy. The presentations review the state-of-the-art in ultraviolet coatings, how those coatings generate polarization aberrations, and recent study results from both the LUVOIR and HabEx teams.

  2. Carbon nanotube fiber terahertz polarizer

    Energy Technology Data Exchange (ETDEWEB)

    Zubair, Ahmed [Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005 (United States); Tsentalovich, Dmitri E.; Young, Colin C. [Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005 (United States); Heimbeck, Martin S. [Charles M. Bowden Laboratory, Aviation & Missile Research, Development, and Engineering Center (AMRDEC), Redstone Arsenal, Alabama 35898 (United States); Everitt, Henry O. [Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005 (United States); Charles M. Bowden Laboratory, Aviation & Missile Research, Development, and Engineering Center (AMRDEC), Redstone Arsenal, Alabama 35898 (United States); Pasquali, Matteo [Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005 (United States); Department of Chemistry, Rice University, Houston, Texas 77005 (United States); Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005 (United States); Kono, Junichiro, E-mail: kono@rice.edu [Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005 (United States); Department of Materials Science and NanoEngineering, Rice University, Houston, Texas 77005 (United States); Department of Physics and Astronomy, Rice University, Houston, Texas 77005 (United States)

    2016-04-04

    Conventional, commercially available terahertz (THz) polarizers are made of uniformly and precisely spaced metallic wires. They are fragile and expensive, with performance characteristics highly reliant on wire diameters and spacings. Here, we report a simple and highly error-tolerant method for fabricating a freestanding THz polarizer with nearly ideal performance, reliant on the intrinsically one-dimensional character of conduction electrons in well-aligned carbon nanotubes (CNTs). The polarizer was constructed on a mechanical frame over which we manually wound acid-doped CNT fibers with ultrahigh electrical conductivity. We demonstrated that the polarizer has an extinction ratio of ∼−30 dB with a low insertion loss (<0.5 dB) throughout a frequency range of 0.2–1.1 THz. In addition, we used a THz ellipsometer to measure the Müller matrix of the CNT-fiber polarizer and found comparable attenuation to a commercial metallic wire-grid polarizer. Furthermore, based on the classical theory of light transmission through an array of metallic wires, we demonstrated the most striking difference between the CNT-fiber and metallic wire-grid polarizers: the latter fails to work in the zero-spacing limit, where it acts as a simple mirror, while the former continues to work as an excellent polarizer even in that limit due to the one-dimensional conductivity of individual CNTs.

  3. Geomorphology of Triton's polar materials

    Science.gov (United States)

    Croft, Steven K.

    1993-01-01

    One of Triton's most debated puzzles is the nature, distribution, and transport of its atmospheric volatiles. The full potential of constraints provided by detailed observations of the morphology and distribution of the polar deposits has not been realized. The objective of this study is characterization of the morphology, distribution, stratigraphy, and geologic setting of Triton's polar materials.

  4. An enhancement of spin polarization by multiphoton pumping in semiconductors

    Energy Technology Data Exchange (ETDEWEB)

    Miah, M. Idrish, E-mail: m.miah@griffith.edu.au [Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Brisbane, QLD 4111 (Australia); Department of Physics, University of Chittagong, Chittagong 4331 (Bangladesh)

    2011-08-15

    Highlights: {yields} Multiphoton pumping and spin generation in semiconductors. {yields} Optical selection rules for inter-band transitions. {yields} Calculations of spin polarization using band-energy model and the second order perturbation theory. {yields} Enhancement of the electronic spin polarization. - Abstract: A pump-probe spectroscopic study has been carried out in zinc-blende bulk semiconductors. In the semiconductor samples, a spin-polarized carrier population is produced by the absorption of a monochromatic circularly polarized light beam with two-photon energy above the direct band gap in bulk semiconductors. The production of a carrier population with a net spin is a consequence of the optical selection rules for the heavy-hole and light-hole valence-to-conduction band transitions. This production is probed by the spin-dependent transmission of the samples in the time domain. The spin polarization of the conduction-band-electrons in dependences of delay of the probe beam as well as of pumping photon energy is estimated. The spin polarization is found to depolarize rapidly for pumping energy larger than the energy gap of the split-off band to the conduction band. From the polarization decays, the spin relaxation times are also estimated. Compared to one-photon pumping, the results, however, show that an enhancement of the spin-polarization is achieved by multiphoton excitation of the samples. The experimental results are compared with those obtained in calculations using second order perturbation theory of the spin transport model. A good agreement between experiment and theory is obtained. The observed results are discussed in details.

  5. An enhancement of spin polarization by multiphoton pumping in semiconductors

    International Nuclear Information System (INIS)

    Miah, M. Idrish

    2011-01-01

    Highlights: → Multiphoton pumping and spin generation in semiconductors. → Optical selection rules for inter-band transitions. → Calculations of spin polarization using band-energy model and the second order perturbation theory. → Enhancement of the electronic spin polarization. - Abstract: A pump-probe spectroscopic study has been carried out in zinc-blende bulk semiconductors. In the semiconductor samples, a spin-polarized carrier population is produced by the absorption of a monochromatic circularly polarized light beam with two-photon energy above the direct band gap in bulk semiconductors. The production of a carrier population with a net spin is a consequence of the optical selection rules for the heavy-hole and light-hole valence-to-conduction band transitions. This production is probed by the spin-dependent transmission of the samples in the time domain. The spin polarization of the conduction-band-electrons in dependences of delay of the probe beam as well as of pumping photon energy is estimated. The spin polarization is found to depolarize rapidly for pumping energy larger than the energy gap of the split-off band to the conduction band. From the polarization decays, the spin relaxation times are also estimated. Compared to one-photon pumping, the results, however, show that an enhancement of the spin-polarization is achieved by multiphoton excitation of the samples. The experimental results are compared with those obtained in calculations using second order perturbation theory of the spin transport model. A good agreement between experiment and theory is obtained. The observed results are discussed in details.

  6. 75 FR 3952 - Delegation by the Under Secretary of State for Public Diplomacy and Public Affairs to the...

    Science.gov (United States)

    2010-01-25

    ... Public Diplomacy and Public Affairs to the Coordinator, Bureau of International Information Programs, or... Diplomacy and Public Affairs by law, including by Delegation of Authority No. 234 of October 1, 1999, and... State for Public Diplomacy and Public Affairs may at any time exercise the functions and authorities...

  7. 78 FR 29779 - Labor Affairs Council of the United States-Colombia Trade Promotion Agreement; Notice of Public...

    Science.gov (United States)

    2013-05-21

    ... Trade Promotion Agreement; Notice of Public Session Meeting AGENCY: International Labor Affairs Bureau... Labor Affairs Bureau (ILAB) of the U.S. Department of Labor gives notice of the public session of the meeting of the Labor Affairs Council (``Council'' or ``LAC''). The LAC public session has been rescheduled...

  8. 43 CFR Appendix A to Part 2 - Department of the Interior FOIA and Public Affairs Contacts, and Reading Rooms

    Science.gov (United States)

    2010-10-01

    ... Affairs Contacts, and Reading Rooms A Appendix A to Part 2 Public Lands: Interior Office of the Secretary...—Department of the Interior FOIA and Public Affairs Contacts, and Reading Rooms Departmental Departmental FOIA... 20240 Telephone No. (202) 208-3909 Fax No. (202) 208-6867 Public Affairs OfficeOffice of Communications...

  9. Spin polarization and magnetic effects in radical reactions

    International Nuclear Information System (INIS)

    Salikhov, K.M.; Molin, Yu.N.; Sagdeev, R.Z.; Buchachenko, A.L.

    1984-01-01

    Studies on the effects of chemically induced dynamic nuclear and electron polarizations (CIDNP and CIDEP), and magnetic effects in radical reactions, have given rise to a new rapidly-progressing field of chemical physics. It came into being about ten years ago and has been attracting the ever-growing attention of researchers in related areas. The present book is a fairly all-embracing review of the state of affairs in this field. The book presents the physical background (both theoretical and experimental) of CIDNP and CIDEP, of the effects of an external magnetic field and magnetic nuclear moment (magnetic isotope effects) on radical reactions in solutions. Great attention has been paid to the application of chemical spin polarization and magnetic effects to solving various problems of chemical kinetics, structural chemistry, molecular physics, magnetobiology, and radiospectroscopy. The book will be useful for physicists, chemists and biologists employing CIDNP, CIDEP and magnetic effects in their investigations, as well as for researchers in related fields of chemical physics. The book can be also recommended for postgraduates and senior undergraduate students. (Auth.)

  10. Generalized Expression for Polarization Density

    International Nuclear Information System (INIS)

    Wang, Lu; Hahm, T.S.

    2009-01-01

    A general polarization density which consists of classical and neoclassical parts is systematically derived via modern gyrokinetics and bounce-kinetics by employing a phase-space Lagrangian Lie-transform perturbation method. The origins of polarization density are further elucidated. Extending the work on neoclassical polarization for long wavelength compared to ion banana width [M. N. Rosenbluth and F. L. Hinton, Phys. Rev. Lett. 80, 724 (1998)], an analytical formula for the generalized neoclassical polarization including both finite-banana-width (FBW) and finite-Larmor-radius (FLR) effects for arbitrary radial wavelength in comparison to banana width and gyroradius is derived. In additional to the contribution from trapped particles, the contribution of passing particles to the neoclassical polarization is also explicitly calculated. Our analytic expression agrees very well with the previous numerical results for a wide range of radial wavelength.

  11. Measuring the sea quark polarization

    International Nuclear Information System (INIS)

    Makdisi, Y.

    1993-01-01

    Spin is a fundamental degree of freedom and measuring the spin structure functions of the nucleon should be a basic endeavor for hadron physics. Polarization experiments have been the domain of fixed target experiments. Over the years large transverse asymmetries have been observed where the prevailing QCD theories predicted little or no asymmetries, and conversely the latest deep inelastic scattering experiments of polarized leptons from polarized targets point to the possibility that little of the nucleon spin is carried by the valence quarks. The possibility of colliding high luminosity polarized proton beams in the Brookhaven Relativistic Heavy Ion Collider (RHIC) provides a great opportunity to extend these studies and systematically probe the spin dependent parton distributions specially to those reactions that are inaccessible to current experiments. This presentation focuses on the measurement of sea quark and possibly the strange quark polarization utilizing the approved RHIC detectors

  12. A review of polarized ion sources

    International Nuclear Information System (INIS)

    Schmor, P.W.

    1995-06-01

    The two main types of polarized ion sources in use on accelerators today are the Atomic Beam Polarized Ion Source (ABIS) source and the Optically Pumped Polarized Ion Source (OPPIS). Both types can provide beams of nuclearly polarized light ions which are either positively or negatively charged. Heavy ion polarized ion sources for accelerators are being developed. (author). 35 refs., 1 tab

  13. Polarization phenomena in heavy-ion reactions

    International Nuclear Information System (INIS)

    Sugimoto, K.; Ishihara, M.; Takahashi, N.

    1984-01-01

    This chapter presents a few key experiments which provide direct evidence of the polarization phenomena in heavy-ion reactions. The theory of polarization observables and measurements is given with the necessary formulae. The polarization phenomena is described and studies of product nuclear polarization in heavy-ion reactions are discussed. Studies of heavy-ion reactions induced by polarized beams are examined

  14. Tolerance of polar phytoplankton communities to metals

    International Nuclear Information System (INIS)

    Echeveste, P.; Tovar-Sánchez, A.; Agustí, S.

    2014-01-01

    Large amounts of pollutants reach polar regions, particularly the Arctic, impacting their communities. In this study we analyzed the toxic levels of Hg, Cd and Pb to natural phytoplankton communities of the Arctic and Southern Oceans, and compared their sensitivities with those observed on phytoplankton natural communities from temperate areas. Mercury was the most toxic metal for both Arctic and Antarctic communities, while both Cd and Pb were toxic only for the Antarctic phytoplankton. Total cell abundance of the populations forming the Arctic community increased under high Cd and Pb concentrations, probably due to a decrease of the grazing pressure or the increase of the most resistant species, although analysis of individual cells indicated that cell death was already induced at the highest levels. These results suggest that phytoplankton may have acquired adapting mechanisms to face high levels of Pb and Cd in the Arctic Ocean. Highlights: • First study analyzing the toxicity of Hg, Cd or Pb to natural polar phytoplankton. • Arctic Ocean communities highly resistant to Cd and Pb, but not to Hg. • Southern Ocean communities sensitive to Cd, Pb and Hg. • Both communities incorporated Pb at a similar level. • Arctic phytoplankton may have acquired adapting mechanisms against Cd and Pb. -- Polar phytoplankton communities are tolerant to Cd and Pb, specially the Arctic ones, suggesting the acquisition of adapting mechanisms to face metals' toxicity

  15. Genomic evidence of geographically widespread effect of gene flow from polar bears into brown bears

    OpenAIRE

    Cahill, James A; Stirling, Ian; Kistler, Logan; Salamzade, Rauf; Ersmark, Erik; Fulton, Tara L; Stiller, Mathias; Green, Richard E; Shapiro, Beth

    2015-01-01

    © 2014 The Authors. Molecular Ecology Published by John Wiley & Sons Ltd. Polar bears are an arctic, marine adapted species that is closely related to brown bears. Genome analyses have shown that polar bears are distinct and genetically homogeneous in comparison to brown bears. However, these analyses have also revealed a remarkable episode of polar bear gene flow into the population of brown bears that colonized the Admiralty, Baranof and Chichagof islands (ABC islands) of Alaska. Here, we...

  16. Proton polarizing system with Ar-ion laser for p-vector-RI scattering experiments

    International Nuclear Information System (INIS)

    Wakui, T.; Hatano, M.; Sakai, H.; Uesaka, T.; Tamii, A.

    2005-01-01

    A proton polarizing system for use in scattering experiments with radioactive isotope beams is described. Protons in a naphthalene crystal doped with pentacene are polarized in a magnetic field of 0.3T at 100K by transferring a large population difference among the photo-excited triplet states of pentacene to the hydrogen nuclei. An Ar-ion laser, which demands minimal maintenance during scattering experiments, is employed to excite the pentacene molecules. A proton polarization of 37% is obtained

  17. Physics with polarized electron beams

    International Nuclear Information System (INIS)

    Swartz, M.L.

    1988-01-01

    As a distinct field, elementary particle physics is now approximately forty years old. In all that time, only a few of the thousands of experiments that have been performed have made use of spin polarized particle beams (with apologies to those who have studied neutrino interactions, polarized beam are defined to refer to the case in which the experimenter has control over the polarization direction). If the discussion is restricted to spin polarized electron beams, the number of experiments becomes countable with the fingers of one hand (with several to spare). There are two reasons for this lack of interest. The first is that spin polarized beams are difficult to produce, accelerate, and transport. The second reason is that any physical process that can occur during the collision of a polarized particle with another (polarized or not) can also occur during the collision of unpolarized particles. One might ask then, why has any effort been expended on the subject. The answer, at least in the case of polarized electron beams, is that electron accelerators and storage rings have in recent years achieved sufficient energy to begin to probe the weak interaction directly. The weak interaction distinguishes between left- and right-handed fermionic currents. Left-handed particles interact in a fundamentally different way than their right-handed counterparts. If the experimenter wishes to explore or exploit this difference, he (or she) must either prepare the spin state of the incident particles or analyze the spin state of outgoing particles. For reasons of genearlity and improved statistical precision, the former is usually preferable to the latter. The first of these lectures will review some of the techniques necessary for the production, transport, and monitoring of polarized electron (or positron) beams. The second lecture will survey some of the physics possibilities of polarized electron-positron collisions

  18. Promoting Diversity Through Polar Interdisciplinary Coordinated Education (Polar ICE)

    Science.gov (United States)

    McDonnell, J. D.; Hotaling, L. A.; Garza, C.; Van Dyk, P. B.; Hunter-thomson, K. I.; Middendorf, J.; Daniel, A.; Matsumoto, G. I.; Schofield, O.

    2017-12-01

    Polar Interdisciplinary Coordinated Education (ICE) is an education and outreach program designed to provide public access to the Antarctic and Arctic regions through polar data and interactions with the scientists. The program provides multi-faceted science communication training for early career scientists that consist of a face-to face workshop and opportunities to apply these skills. The key components of the scientist training workshop include cultural competency training, deconstructing/decoding science for non-expert audiences, the art of telling science stories, and networking with members of the education and outreach community and reflecting on communication skills. Scientists partner with educators to provide professional development for K-12 educators and support for student research symposia. Polar ICE has initiated a Polar Literacy initiative that provides both a grounding in big ideas in polar science and science communication training designed to underscore the importance of the Polar Regions to the public while promoting interdisciplinary collaborations between scientists and educators. Our ultimate objective is to promote STEM identity through professional development of scientists and educators while developing career awareness of STEM pathways in Polar science.

  19. The wavelength dependence of polarization in NGC 2023

    International Nuclear Information System (INIS)

    Rolph, C. D.; Scarrott, S. M.

    1989-01-01

    NGC 2023 is a bright reflection nebula illuminated by the central star HD37903. At 2 microns the nebula is seen solely by reflected light from the central star but in the NIR there is excess radiation that is supposed to arise from thermal emission from a population of small grains (Sellgren, 1984). The unexpectedly high surface brightness at R and I wavelengths has led to the suggestion that even at these wavelengths there is a significant contribution from this thermal emission process (Witt, Schild, and Kraiman, 1984). If the nebula is seen by reflected starlight then this radiation will be linearly polarized. The level of polarization depends on the scattering geometry, grain size distribution, etc., and is typically 20 to 40 percent for nebulae such as NGC 1999 which is morphologically similar to NGC 2023. If, in any waveband, there is a contribution of radiation from emission processes this radiation will be unpolarized and will serve to dilute the scattered radiation to give a lower level of observed polarization. A study of the wavelength dependence of polarization in nebulae in which there may be thermal emission from grains will indicate the contribution from this process to the total luminosity. Polarization maps were produced in BVRI wavebands for the NGC 2023 nebulosity which confirm that at all wavelengths it is a reflection nebula illuminated by a central star. The wavelength dependence of polarization at representative points in the nebula and in a scatter plot of polarization in V and I wavebands at all points at which measurements are given. Results indicate that throughout the nebula there is a general trend for the level of polarization to increase with wavelength and that maximum levels of polarization occur at the longest wavelengths. No evidence is seen in the data for any significant contribution from the thermal emission from grains in the BVRI luminosity of NGC 2023

  20. Lunar true polar wander inferred from polar hydrogen.

    Science.gov (United States)

    Siegler, M A; Miller, R S; Keane, J T; Laneuville, M; Paige, D A; Matsuyama, I; Lawrence, D J; Crotts, A; Poston, M J

    2016-03-24

    The earliest dynamic and thermal history of the Moon is not well understood. The hydrogen content of deposits near the lunar poles may yield insight into this history, because these deposits (which are probably composed of water ice) survive only if they remain in permanent shadow. If the orientation of the Moon has changed, then the locations of the shadowed regions will also have changed. The polar hydrogen deposits have been mapped by orbiting neutron spectrometers, and their observed spatial distribution does not match the expected distribution of water ice inferred from present-day lunar temperatures. This finding is in contrast to the distribution of volatiles observed in similar thermal environments at Mercury's poles. Here we show that polar hydrogen preserves evidence that the spin axis of the Moon has shifted: the hydrogen deposits are antipodal and displaced equally from each pole along opposite longitudes. From the direction and magnitude of the inferred reorientation, and from analysis of the moments of inertia of the Moon, we hypothesize that this change in the spin axis, known as true polar wander, was caused by a low-density thermal anomaly beneath the Procellarum region. Radiogenic heating within this region resulted in the bulk of lunar mare volcanism and altered the density structure of the Moon, changing its moments of inertia. This resulted in true polar wander consistent with the observed remnant polar hydrogen. This thermal anomaly still exists and, in part, controls the current orientation of the Moon. The Procellarum region was most geologically active early in lunar history, which implies that polar wander initiated billions of years ago and that a large portion of the measured polar hydrogen is ancient, recording early delivery of water to the inner Solar System. Our hypothesis provides an explanation for the antipodal distribution of lunar polar hydrogen, and connects polar volatiles to the geologic and geophysical evolution of the Moon

  1. POLARIZED BEAMS: 1 - Longitudinal electron spin polarization at HERA

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1994-09-15

    Wednesday 4 May marked a turning point in the art of the manipulation of spins in electron storage rings: longitudinal electron spin polarization (with the spins oriented along the electrons' direction of motion) was established in the electron ring of HERA, the electronproton collider at DESY in Hamburg. A polarization level of about 55% was obtained and polarizations of over 60% were reproducibly obtained in the following days. The beam energy was 27.52 GeV, corresponding to half integer spin tune of 62.5.

  2. EDITORIAL: Non-polar and semipolar nitride semiconductors Non-polar and semipolar nitride semiconductors

    Science.gov (United States)

    Han, Jung; Kneissl, Michael

    2012-02-01

    topics including growth and heteroepitaxy, bulk GaN substrates, theory and modelling, optical properties, laser diodes and LEDs as well as transport properties and electronics. Farrell et al review materials and growth issues for high-performance non- and semipolar light-emitting devices, and Scholz provides an overview of heteroepitaxial growth of semipolar GaN. Okada et al review growth mechanisms of non- and semipolar GaN layers on patterned sapphire substrates, and Vennéguès discusses defect reduction methods for heteroepitaxially grown non- and semipolar III-nitride films. Leung et al explain how kinetic Wulff plots can be used to design and control non-polar and semipolar GaN heteroepitaxy, and a contribution by Sawaki et al explores the impurity incorporation in (1-101) GaN grown on Si substrates. In the area of bulk crystal growth Kucharski et al review non- and semipolar GaN substrates by ammonothermal growth, and Chichibu et al discuss the challenges for epitaxial growth of InGaN on free-standing m-plane GaN substrates. Calculation of semipolar orientations for wurtzitic semiconductor heterostructures and their application to nitrides and oxides are reviewed by Bigenwald et al, and Ito et al present an ab initio approach to reconstruction, adsorption, and incorporation on GaN surfaces. Finally, the theoretical description of non-polar and semipolar nitride semiconductor quantum-well structures is presented by Ahn et al. In a discussion of the optical properties, Kisin et al discuss the effect of the quantum well population on the optical characteristics of polar, semipolar and non-polar III-nitride light emitters, and Jönen et al investigate the indium incorporation and optical properties of non- and semipolar GaInN QW structures. Wernicke et al explore the emission wavelength of polar, non-polar, and semipolar InGaN quantum wells and the incorporation of indium. In a contribution by Melo et al, the gain in polar and non-polar/semipolar gallium

  3. Update of the Polar SWIFT model for polar stratospheric ozone loss (Polar SWIFT version 2)

    Science.gov (United States)

    Wohltmann, Ingo; Lehmann, Ralph; Rex, Markus

    2017-07-01

    The Polar SWIFT model is a fast scheme for calculating the chemistry of stratospheric ozone depletion in polar winter. It is intended for use in global climate models (GCMs) and Earth system models (ESMs) to enable the simulation of mutual interactions between the ozone layer and climate. To date, climate models often use prescribed ozone fields, since a full stratospheric chemistry scheme is computationally very expensive. Polar SWIFT is based on a set of coupled differential equations, which simulate the polar vortex-averaged mixing ratios of the key species involved in polar ozone depletion on a given vertical level. These species are O3, chemically active chlorine (ClOx), HCl, ClONO2 and HNO3. The only external input parameters that drive the model are the fraction of the polar vortex in sunlight and the fraction of the polar vortex below the temperatures necessary for the formation of polar stratospheric clouds. Here, we present an update of the Polar SWIFT model introducing several improvements over the original model formulation. In particular, the model is now trained on vortex-averaged reaction rates of the ATLAS Chemistry and Transport Model, which enables a detailed look at individual processes and an independent validation of the different parameterizations contained in the differential equations. The training of the original Polar SWIFT model was based on fitting complete model runs to satellite observations and did not allow for this. A revised formulation of the system of differential equations is developed, which closely fits vortex-averaged reaction rates from ATLAS that represent the main chemical processes influencing ozone. In addition, a parameterization for the HNO3 change by denitrification is included. The rates of change of the concentrations of the chemical species of the Polar SWIFT model are purely chemical rates of change in the new version, whereas in the original Polar SWIFT model, they included a transport effect caused by the

  4. SUSANS With Polarized Neutrons.

    Science.gov (United States)

    Wagh, Apoorva G; Rakhecha, Veer Chand; Strobl, Makus; Treimer, Wolfgang

    2005-01-01

    Super Ultra-Small Angle Neutron Scattering (SUSANS) studies over wave vector transfers of 10(-4) nm(-1) to 10(-3) nm(-1) afford information on micrometer-size agglomerates in samples. Using a right-angled magnetic air prism, we have achieved a separation of ≈10 arcsec between ≈2 arcsec wide up- and down-spin peaks of 0.54 nm neutrons. The SUSANS instrument has thus been equipped with the polarized neutron option. The samples are placed in a uniform vertical field of 8.8 × 10(4) A/m (1.1 kOe). Several magnetic alloy ribbon samples broaden the up-spin neutron peak significantly over the ±1.3 × 10(-3) nm(-1) range, while leaving the down-spin peak essentially unaltered. Fourier transforms of these SUSANS spectra corrected for the instrument resolution, yield micrometer-range pair distribution functions for up- and down-spin neutrons as well as the nuclear and magnetic scattering length density distributions in the samples.

  5. Nuclear physics with polarized particles

    CERN Document Server

    Paetz gen Schieck, Hans

    2012-01-01

    The measurement of spin-polarization observables in reactions of nuclei and particles is of great utility and advantage when the effects of single-spin sub-states are to be investigated. Indeed, the unpolarized differential cross-section encompasses the averaging over the spin states of the particles, and thus loses details of the interaction process. This introductory text combines, in a single volume, course-based lecture notes on spin physics and on polarized-ion sources with the aim of providing a concise yet self-contained starting point for newcomers to the field, as well as for lecturers in search of suitable material for their courses and seminars. A significant part of the book is devoted to introducing the formal theory-a description of polarization and of nuclear reactions with polarized particles. The remainder of the text describes the physical basis of methods and devices necessary to perform experiments with polarized particles and to measure polarization and polarization effects in nuclear rea...

  6. HIV rapid testing in a Veterans Affairs hospital ED setting: a 5-year sustainability evaluation.

    Science.gov (United States)

    Knapp, Herschel; Hagedorn, Hildi; Anaya, Henry D

    2014-08-01

    Routine HIV testing in primary care settings is now recommended in the United States. The US Department of Veterans Affairs (VA) has increased the number of patients tested for HIV, but overall HIV testing rates in VA remain low. A proven strategy for increasing such testing involves nurse-initiated HIV rapid testing (HIV RT). The purpose of this work was to use a mixed methodology approach to evaluate the 5-year sustainability of an intervention that implemented HIV RT in a VA emergency department setting in a large, urban VA medical center to reduce missed diagnostic and treatment opportunities in this vulnerable patient population. In-person semistructured interviews were conducted with providers and stakeholders. Interview notes were qualitatively coded for emerging themes. Quarterly testing rates were evaluated for a 5-year time span starting from the launch in July 2008. Findings indicate that HIV RT was sustained by the enthusiasm of 2 clinical champions who oversaw the registered nurses responsible for conducting the testing. The departure of the clinical champions was correlated with a substantial drop-off in testing. Findings also indicate potential strategies for improving sustainability including engaging senior leadership in the project, engaging line staff in the implementation planning from the start to increase ownership over the innovation, incorporating information into initial training explaining the importance of the innovation to quality patient care, providing ongoing training to maintain skills, and providing routine progress reports to staff to demonstrate the ongoing impact of their efforts. Published by Elsevier Inc.

  7. Epidemiology and burden of influenza in the U.S. Department of Veterans Affairs.

    Science.gov (United States)

    Lucero-Obusan, Cynthia; Schirmer, Patricia L; Wendelboe, Aaron; Oda, Gina; Holodniy, Mark

    2018-03-01

    We describe influenza activity in the US Veterans Affairs (VA) population for the 2010-2011 through 2015-2016 seasons and compare with national CDC FluView data. VA confirmed influenza cases ranged from 1005 to 11 506 per season; triage calls from 6090 to 10 346; outpatient visits from 3849 to 13 406; antiviral prescriptions from 3650 to 32 826; hospitalizations from 546 to 4673; and deaths in hospitalized patients from 17 to 139. Peak activity was generally the same as observed nationally by the CDC. For the seasons analyzed, correlation between VA and CDC %ILI visits (r = .863), influenza hospitalizations (r = .953), positive tests (r = .948), and percent of tests positive (r = .938) was strong. Understanding influenza burden is important for evaluating prevention priorities and resource allocation within VA. © 2017 The Authors. Influenza and Other Respiratory Viruses Published by John Wiley & Sons Ltd.

  8. POLAR ORGANIC CHEMICAL INTEGRATIVE SAMPLING ...

    Science.gov (United States)

    The purpose of the research presented in this paper is two-fold: (1) to demonstrate the 4 coupling of two state-of-the-art techniques: a time-weighted polar organic integrative sampler (POCIS) and micro-liquid chromatography-electrospray/ion trap mass spectrometry (u-LC-6 ES/ITMS); and (2) the assessment of these methodologies in a real-world environment -wastewater effluent - for detecting six drugs (four prescription and two illicit). In the effluent from three wastewater treatment plants (WWTP), azithromycin was detected at concentrations ranging from 15ng/L to 66ng/L, equivalent to the total annual release of 0.4 -4 kg into the receiving waters. Detected and confirmed in the effluent from two WWTPs were two illicit drugs methamphetamine and methylenedioxymethamphetamine (MDMA), at 2ng/L and 0.5ng/L, respectively. While the ecotoxicological significance of drugs in environmental matrices, particularly water, has not been closely examined, it can only be surmised that these substances have the potential to adversely affect biota that are continuously exposed to them even at very low levels. The potential for chronic affects on human health is also unknown, but of increasing concern due to the multi use character of water, particularly in densely populated arid areas. The research focused on in the subtasks is the development and application of state-of the-art technologies to meet the needs of the public, Office of Water, and ORD in the area of Water Quality

  9. Few-body experiments with polarized beams and polarized targets

    International Nuclear Information System (INIS)

    Simmons, J.E.

    1983-01-01

    A survey is presented concerning recent polarization experiments in the elastic p-d, p- 3 He, and p- 4 He systems. Mention is made of selected neutron experiments. The nominal energy range is 10 to 1000 MeV. Recent results and interpretations of the p-d system near 10 MeV are discussed. New experiments on the energy dependence of back angle p-d tensor polarization are discussed with respect to resolution of discrepancies and difficulty of theoretical interpretation. Progress is noted concerning multiple scattering interpretation of forward p-d deuteron polarization. Some new results are presented concerning the p- 3 He system and higher energy p- 4 He polarization experiments. 52 references

  10. Thermodynamics of polarized relativistic matter

    Energy Technology Data Exchange (ETDEWEB)

    Kovtun, Pavel [Department of Physics and Astronomy, University of Victoria,PO Box 1700 STN CSC, Victoria BC, V8W 2Y2 (Canada)

    2016-07-05

    We give the free energy of equilibrium relativistic matter subject to external gravitational and electromagnetic fields, to one-derivative order in the gradients of the external fields. The free energy allows for a straightforward derivation of bound currents and bound momenta in equilibrium. At leading order, the energy-momentum tensor admits a simple expression in terms of the polarization tensor. Beyond the leading order, electric and magnetic polarization vectors are intrinsically ambiguous. The physical effects of polarization, such as the correlation between the magneto-vortically induced surface charge and the electro-vortically induced surface current, are not ambiguous.

  11. Ejectile polarization and nuclear orbitals

    International Nuclear Information System (INIS)

    Ohnishi, A.; Maruyama, T.; Horiuchi, H.

    1992-01-01

    Ejectile polarization phenomena are studied by the use of 'Quantum Molecular Dynamics plus external mean field' model. It is shown that the far-side contribution increases as the incident energy increases or the target charge decreases. The incident energy and the target dependence of ejectile polarization data is reproduced qualitatively. The near- and far-side contributions themselves are calculated to be almost monotone functions of ejectile momentum as is predicted in a simple projectile fragmentation scheme without the assumption that the linear and angular momentum transfers are negligible, and their statistical average results in various shapes in ejectile polarization

  12. Acceleration of polarized proton beams

    International Nuclear Information System (INIS)

    Roser, T.

    1998-01-01

    The acceleration of polarized beams in circular accelerators is complicated by the numerous depolarizing spin resonances. Using a partial Siberian snake and a rf dipole that ensure stable adiabatic spin motion during acceleration has made it possible to accelerate polarized protons to 25 GeV at the Brookhaven AGS. Full Siberian snakes are being developed for RHIC to make the acceleration of polarized protons to 250 GeV possible. A similar scheme is being studied for the 800 GeV HERA proton accelerator

  13. Membrane Transport across Polarized Epithelia.

    Science.gov (United States)

    Garcia-Castillo, Maria Daniela; Chinnapen, Daniel J-F; Lencer, Wayne I

    2017-09-01

    Polarized epithelial cells line diverse surfaces throughout the body forming selective barriers between the external environment and the internal milieu. To cross these epithelial barriers, large solutes and other cargoes must undergo transcytosis, an endocytic pathway unique to polarized cell types, and significant for the development of cell polarity, uptake of viral and bacterial pathogens, transepithelial signaling, and immunoglobulin transport. Here, we review recent advances in our knowledge of the transcytotic pathway for proteins and lipids. We also discuss briefly the promise of harnessing the molecules that undergo transcytosis as vehicles for clinical applications in drug delivery. Copyright © 2017 Cold Spring Harbor Laboratory Press; all rights reserved.

  14. PolarHub: A Global Hub for Polar Data Discovery

    Science.gov (United States)

    Li, W.

    2014-12-01

    This paper reports the outcome of a NSF project in developing a large-scale web crawler PolarHub to discover automatically the distributed polar dataset in the format of OGC web services (OWS) in the cyberspace. PolarHub is a machine robot; its goal is to visit as many webpages as possible to find those containing information about polar OWS, extract this information and store it into the backend data repository. This is a very challenging task given huge data volume of webpages on the Web. Three unique features was introduced in PolarHub to make it distinctive from earlier crawler solutions: (1) a multi-task, multi-user, multi-thread support to the crawling tasks; (2) an extensive use of thread pool and Data Access Object (DAO) design patterns to separate persistent data storage and business logic to achieve high extendibility of the crawler tool; (3) a pattern-matching based customizable crawling algorithm to support discovery of multi-type geospatial web services; and (4) a universal and portable client-server communication mechanism combining a server-push and client pull strategies for enhanced asynchronous processing. A series of experiments were conducted to identify the impact of crawling parameters to the overall system performance. The geographical distribution pattern of all PolarHub identified services is also demonstrated. We expect this work to make a major contribution to the field of geospatial information retrieval and geospatial interoperability, to bridge the gap between data provider and data consumer, and to accelerate polar science by enhancing the accessibility and reusability of adequate polar data.

  15. Polarized deuteron elastic scattering from a polarized proton target

    Energy Technology Data Exchange (ETDEWEB)

    Schmelzer, R.; Kuiper, H.; Schoeberl, M.; Berber, S.; Hilmert, H.; Koeppel, R.; Pferdmenges, R. (Erlangen-Nuernberg Univ., Erlangen (Germany, F.R.). Physikalisches Inst.); Zankel, H. (Graz Univ. (Austria). Inst. fuer Theoretische Physik)

    1983-01-13

    Measurements are reported of the spin correlation parameter Cy,y for the elastic scattering of 10.0 MeV vector polarized deuterons from a polarized proton target at five CM angles (76/sup 0/,85/sup 0/,98/sup 0/,115/sup 0/,132/sup 0/). The experimental results are compared with different predictions. A Faddeev type calculation on the basis of local potentials also including approximate Coulomb distortion is favoured by our experimental results.

  16. Polarized deuteron elastic scattering from a polarized proton target

    International Nuclear Information System (INIS)

    Schmelzer, R.; Kuiper, H.; Schoeberl, M.; Berber, S.; Hilmert, H.; Koeppel, R.; Pferdmenges, R.; Zankel, H.

    1983-01-01

    Measurements are reported of the spin correlation parameter Cy,y for the elastic scattering of 10.0 MeV vector polarized deuterons from a polarized proton target at five CM angles (76 0 ,85 0 ,98 0 ,115 0 ,132 0 ). The experimental results are compared with different predictions. A Faddeev type calculation on the basis of local potentials also including approximate Coulomb distortion is favoured by our experimental results. (orig.)

  17. Photonic Crystal Polarizing and Non-Polarizing Beam Splitters

    International Nuclear Information System (INIS)

    Chun-Ying, Guan; Jin-Hui, Shi; Li-Boo, Yuan

    2008-01-01

    A polarizing beam splitter (PBS) and a non-polarizing beam splitter (NPBS) based on a photonic crystal (PC) directional coupler are demonstrated. The photonic crystal directional coupler consists of a hexagonal lattice of dielectric pillars in air and has a complete photonic band gap. The photonic band structure and the band gap map are calculated using the plane wave expansion (PWE) method. The splitting properties of the splitter are investigated numerically using the finite difference time domain (FDTD) method

  18. Basic fibroblast growth factor predicts cardiovascular disease occurrence in participants from the Veterans Affairs Diabetes Trial

    Directory of Open Access Journals (Sweden)

    Mark B Zimering

    2013-11-01

    Full Text Available Aim: Cardiovascular disease is a leading cause of morbidity and mortality in adults with type 2 diabetes mellitus. The aim of the present study was to test whether plasma basic fibroblast growth factor (bFGF levels predict future cardiovascular disease (CVD occurrence in adults from the Veterans Affairs Diabetes Trial. Methods: Nearly four- hundred veterans, 40 years of age or older, having a mean baseline diabetes duration of 11.4 years were recruited from outpatient clinics at six geographically distributed sites in the Veterans Affairs Diabetes Trial (VADT. Within the VADT, they were randomly assigned to intensive or standard glycemic treatment, with follow-up as much as seven and one-half years. Cardiovascular disease occurrence was examined at baseline in the patient population and during randomized treatment. Plasma bFGF was determined with a sensitive, specific two-site enzyme-linked immunoassay at the baseline study visit in all 399 subjects. Results: One hundred-five first cardiovascular events occurred in these 399 subjects. The best fit model of risk factors associated with the time to first cardiovascular disease occurrence (in the study over a seven and one-half year period had as significant predictors: prior cardiovascular event, (hazard ratio [HR] 3.378; 95% confidence intervals [CI] 3.079- 3.807; P < .0001, baseline plasma bFGF (HR 1.008; 95% CI 1.002-1.014; P =.01, age, (HR 1.027; 95% CI 1.004-1.051; P =.019, baseline plasma triglycerides, (HR 1.001; 95% CI 1.000-1.002; P =.02 and diabetes duration-treatment interaction (P =.03. Intensive glucose-lowering was associated with significantly decreased hazard ratios for CVD occurrence (0.38-0.63 in patients with known diabetes duration of 0-10 years, and non-significantly increased hazard ratios for CVD occurrence (0.82-1.78 in patients with longer diabetes duration. Conclusion: High level ofplasma basic fibroblast growth factor is a predictive biomarker of future cardiovascular

  19. Applications of polarization speckle in skin cancer detection and monitoring

    Science.gov (United States)

    Lee, Tim K.; Tchvialeva, Lioudmila; Phillips, Jamie; Louie, Daniel C.; Zhao, Jianhua; Wang, Wei; Lui, Harvey; Kalia, Sunil

    2018-01-01

    Polarization speckle is a rapidly developed field. Unlike laser speckle, polarization speckle consists of stochastic interference patterns with spatially random polarizations, amplitudes and phases. We have been working in this exciting research field, developing techniques to generate polarization patterns from skin. We hypothesize that polarization speckle patterns could be used in biomedical applications, especially, for detecting and monitoring skin cancers, the most common neoplasmas for white populations around the world. This paper describes our effort in developing two polarization speckle devices. One of them captures the Stokes parameters So and S1 simultaneously, and another one captures all four Stokes parameters So, S1, S2, and S3 in one-shot, within milliseconds. Hence these two devices could be used in medical clinics and assessed skin conditions in-vivo. In order to validate our hypothesis, we conducted a series of three clinical studies. These are early pilot studies, and the results suggest that the devices have potential to detect and monitor skin cancers.

  20. STELLAR NUCLEI AND INNER POLAR DISKS IN LENTICULAR GALAXIES

    Energy Technology Data Exchange (ETDEWEB)

    Sil’chenko, Olga K., E-mail: olga@sai.msu.su [Sternberg Astronomical Institute, M.V. Lomonosov Moscow State University, Moscow, 119992 (Russian Federation); Isaac Newton Institute, Chile, Moscow Branch (Chile)

    2016-09-01

    I analyze statistics of the stellar population properties for stellar nuclei and bulges of nearby lenticular galaxies in different environments by using panoramic spectral data of the integral-field spectrograph SAURON retrieved from the open archive of the Isaac Newton Group. I also estimate the fraction of nearby lenticular galaxies having inner polar gaseous disks by exploring the volume-limited sample of early-type galaxies of the ATLAS-3D survey. By inspecting the two-dimensional velocity fields of the stellar and gaseous components with the running tilted-ring technique, I have found seven new cases of inner polar disks. Together with those, the frequency of inner polar disks in nearby S0 galaxies reaches 10%, which is much higher than the frequency of large-scale polar rings. Interestingly, the properties of the nuclear stellar populations in the inner polar ring hosts are statistically the same as those in the whole S0 sample, implying similar histories of multiple gas-accretion events from various directions.

  1. STELLAR NUCLEI AND INNER POLAR DISKS IN LENTICULAR GALAXIES

    International Nuclear Information System (INIS)

    Sil’chenko, Olga K.

    2016-01-01

    I analyze statistics of the stellar population properties for stellar nuclei and bulges of nearby lenticular galaxies in different environments by using panoramic spectral data of the integral-field spectrograph SAURON retrieved from the open archive of the Isaac Newton Group. I also estimate the fraction of nearby lenticular galaxies having inner polar gaseous disks by exploring the volume-limited sample of early-type galaxies of the ATLAS-3D survey. By inspecting the two-dimensional velocity fields of the stellar and gaseous components with the running tilted-ring technique, I have found seven new cases of inner polar disks. Together with those, the frequency of inner polar disks in nearby S0 galaxies reaches 10%, which is much higher than the frequency of large-scale polar rings. Interestingly, the properties of the nuclear stellar populations in the inner polar ring hosts are statistically the same as those in the whole S0 sample, implying similar histories of multiple gas-accretion events from various directions.

  2. Mean energy polarized neutron source

    International Nuclear Information System (INIS)

    Aleshin, V.A.; Zaika, N.I.; Kolotyj, V.V.; Prokopenko, V.S.; Semenov, V.S.

    1988-01-01

    Physical bases and realization scheme of a pulsed source of polarized neutrons with the energy of up to 75 MeV are described. The source comprises polarized deuteron source, transport line, low-energy ion and axial injector to the accelerator, U-240 isochronous cyclotron, targets for polarized neutron production, accelerated deuteron transport line and flight bases. The pulsed source of fast neutrons with the energy of up to 75 MeV can provide for highly polarized neutron beams with the intensity by 2-3 orders higher than in the most perfect source of this range which allows one to perform various experiments with high efficiency and energy resolution. 9 refs.; 1 fig

  3. Circular polarization observed in bioluminescence

    NARCIS (Netherlands)

    Wynberg, H.; Meijer, E.W.; Hummelen, J.C.; Dekkers, H.P.J.M.; Schippers, P.H.; Carlson, A.D.

    1980-01-01

    The left and right lanterns of live larvae of the fireflies Photuris lucicrescens and P. versicolor emitted circularly polarized light of opposite sense. A possible mechanism is discussed. [on SciFinder (R)

  4. The definition of cross polarization

    DEFF Research Database (Denmark)

    Ludwig, Arthur

    1973-01-01

    There are at least three different definitions of cross polarization used in the literature. The alternative definitions are discussed with respect to several applications, and the definition which corresponds to one standard measurement practice is proposed as the best choice....

  5. Polar source analysis : technical memorandum

    Science.gov (United States)

    2017-09-29

    The following technical memorandum describes the development, testing and analysis of various polar source data sets. The memorandum also includes recommendation for potential inclusion in future releases of AEDT. This memorandum is the final deliver...

  6. Dynamic elections and ideological polarization

    Czech Academy of Sciences Publication Activity Database

    Nunnari, S.; Zápal, Jan

    2017-01-01

    Roč. 25, č. 4 (2017), s. 505-534 ISSN 1047-1987 Institutional support: RVO:67985998 Keywords : elections * political polarization Subject RIV: AH - Economics OBOR OECD: Economic Theory Impact factor: 3.361, year: 2016

  7. Dynamic elections and ideological polarization

    Czech Academy of Sciences Publication Activity Database

    Nunnari, S.; Zápal, Jan

    2017-01-01

    Roč. 25, č. 4 (2017), s. 505-534 ISSN 1047-1987 Institutional support: Progres-Q24 Keywords : elections * political polarization Subject RIV: AH - Economics OBOR OECD: Economic Theory Impact factor: 3.361, year: 2016

  8. Polarization at LEP. Vol. 2

    International Nuclear Information System (INIS)

    Alexander, G.; Altarelli, G.; Blondel, A.; Coignet, G.; Keil, E.; Plane, D.E.; Treille, D.

    1988-01-01

    This report contains a collection of papers covering the most important part of studies carried out by five study groups in view of a programme of experiments with polarized beams at LEP, the Large Electron-Positron collider under construction at CERN. The emphasis is on precision measurements at the Z peak. Such measurements are shown to be of considerable theoretical interest as well as very clean from the point of view of theoretical and experimental uncertainties. The measurement of the beam polarization can certainly be performed with sufficient accuracy, thanks to the availability of both e + and e - beam polarization. The normalization of the data taken with different beam helicities poses certain constraints that are described. Substantial progress has been made in understanding the possibility of providing longitudinally polarized beams in the LEP machine: The design of new wigglers and spin rotators, the study of correction procedures and results of numerical simulations are presented. (orig.)

  9. Legitimation documents issued by the French Ministry of Foreign Affairs

    CERN Multimedia

    2006-01-01

    New rules and reminder The French Ministry of Foreign Affairs (hereinafter referred to as 'MAE') has informed CERN of the following solution to a problem that has existed for over 30 years: from now on, members of the personnel residing in France and holding a full-time contract of between three and six months will be entitled to a special EM-type residence permit that does not confer any privileges (see Paragraph 2 below). Furthermore, the MAE has stated that it is willing to request the competent authorities to look favourably on applications for work permits by a member of the personnel's family members who reside in France and wish to take up gainful employment, although it is unable to guarantee the outcome (see Paragraph 7 below). The MAE also wishes to draw attention to the following rules concerning the legitimation documents it issues and to point out that compliance with these rules is essential for the proper operation of all international organisations established in France. This communicatio...

  10. Veterans affairs disability compensation: a case study in countertherapeutic jurisprudence.

    Science.gov (United States)

    Mossman, D

    1996-01-01

    This article examines the disability compensation programs and health care system of the Department of Veterans Affairs (VA) from the perspective of therapeutic jurisprudence scholarship. VA psychiatric patients have unambiguous financial incentives to endlessly litigate disability claims, to seek lengthy hospitalization rather than outpatient treatment, and to be ill, disabled, and unemployed. These countertherapeutic incentives reward incapacitation, encourage perceiving one-self as sick, diminish personal responsibility, taint treatment relationships, and lead to disparaging perceptions of VA patients. In addition, such perceptions produce moral dilemmas that arise from mutual distrust and frustration when patients and caregivers have antagonistic goals for the clinical encounter. Changes in disability determination procedures, compensation levels, and patterns of payment for treatment could give VA patients and caregivers a "healthier" health care system that encourages personal responsibility and promotes respectful attitudes toward patients. In the absence of such changes, an awareness of countertherapeutic financial incentives can help clinicians distinguish between psychopathological behavior and the pursuit of a rational income strategy, and can help practitioners recognize that apparently deceitful or litigious behavior represents a reasonable response to the economic contingencies that VA patients face.

  11. Gender characteristics of legal conscience in internal affairs agencies staff

    Directory of Open Access Journals (Sweden)

    Kuznetsova O.V.

    2016-06-01

    Full Text Available This article presents the empirical research results of the level of legal conscience forming in law enforcement officials. The study of gender specifics of personnel is now becoming more and more relevant due to a constant increase in the number of women entering the Ministry of Internal Affairs service. The study involved 160 male and 120 female staff members. Analysis of the results revealed a general legal conscience trend typical for male and female employees which manifests in a high level of legal knowledge, adequate understanding of group relativity of moral and ethical norms, civic un-engagement and disinterest to leadership role. This trend reflects a certain viewpoint when human rights are considered to include only freedom, independence and personal self-assertion without responsibility and civic duties. It was found that female employees have higher level of legal conscience forming than male employees. This led to the conclusion of a high-availability of female employees to comply with legal regulations and requirements.

  12. LEGITIMATION DOCUMENTS ISSUED BY THE FRENCH MINISTRY OF FOREIGN AFFAIRS

    CERN Multimedia

    2003-01-01

    The French Ministry of Foreign Affairs (hereinafter referred to as "MAE") has sent a reminder of the following rules relating to legitimation documents (special cards, henceforth called "special residence permits" (titres de séjour spéciaux), and attestations de fonctions) that it issues. The Ministry has specified that compliance with these rules is essential to the proper functioning of any International Organization established in France. 1. Types of document and use a) Special CD, FI and AT residence permits They serve as residence permits for members of the personnel and the members of their families who are not of French nationality and who do not have the status of permanent resident (see N.B. below). Vis-à-vis the French authorities, they serve as proof that those holding these cards enjoy the privileges and immunities provided for by the Status Agreement between CERN and France (immunity from legal process in the discharge of their duties, entitlement to drive a vehicle registered in a special ...

  13. Multidisciplinary HIS DICOM interfaces at the Department of Veterans Affairs

    Science.gov (United States)

    Kuzmak, Peter M.; Dayhoff, Ruth E.

    2000-05-01

    The U.S. Department of Veterans Affairs (VA) is using the Digital Imaging and Communications in Medicine (DICOM) standard to integrate image data objects from multiple systems for use across the healthcare enterprise. DICOM uses a structured representation of image data and a communication mechanism that allows the VA to easily acquire images from multiple sources and store them directly into the online patient record. The VA can obtain both radiology and non- radiology images using DICOM, and can display them on low-cost clinician's color workstations throughout the medical center. High-resolution gray-scale diagnostic quality multi-monitor workstations with specialized viewing software can be used for reading radiology images. The VA's DICOM capabilities can interface six different commercial Picture Archiving and Communication Systems (PACS) and over twenty different image acquisition modalities. The VA is advancing its use of DICOM beyond radiology. New color imaging applications for Gastrointestinal Endoscopy and Ophthalmology using DICOM are under development. These are the first DICOM offerings for the vendors, who are planning to support the recently passed DICOM Visible Light and Structured Reporting service classes. Implementing these in VistA is a challenge because of the different workflow and software support for these disciplines within the VA HIS environment.

  14. Modeling optical and UV polarization of AGNs. IV. Polarization timing

    Science.gov (United States)

    Rojas Lobos, P. A.; Goosmann, R. W.; Marin, F.; Savić, D.

    2018-03-01

    Context. Optical observations cannot resolve the structure of active galactic nuclei (AGN), and a unified model for AGN was inferred mostly from indirect methods, such as spectroscopy and variability studies. Optical reverberation mapping allowed us to constrain the spatial dimension of the broad emission line region and thereby to measure the mass of supermassive black holes. Recently, reverberation was also applied to the polarized signal emerging from different AGN components. In principle, this should allow us to measure the spatial dimensions of the sub-parsec reprocessing media. Aim. We conduct numerical modeling of polarization reverberation and provide theoretical predictions for the polarization time lag induced by different AGN components. The model parameters are adjusted to the observational appearance of the Seyfert 1 galaxy NGC 4151. Methods: We modeled scattering-induced polarization and tested different geometries for the circumnuclear dust component. Our tests included the effects of clumpiness and different dust prescriptions. To further extend the model, we also explored the effects of additional ionized winds stretched along the polar direction, and of an equatorial scattering ring that is responsible for the polarization angle observed in pole-on AGN. The simulations were run using a time-dependent version of the STOKES code. Results: Our modeling confirms the previously found polarization characteristics as a function of the observer`s viewing angle. When the dust adopts a flared-disk geometry, the lags reveal a clear difference between type 1 and type 2 AGN. This distinction is less clear for a torus geometry where the time lag is more sensitive to the geometry and optical depth of the inner surface layers of the funnel. The presence of a scattering equatorial ring and ionized outflows increased the recorded polarization time lags, and the polar outflows smooths out dependence on viewing angle, especially for the higher optical depth of the

  15. Intergovernmental Affairs: Tribal Affairs

    Science.gov (United States)

    Employment and Payroll Survey of Business Owners Work from Home Our statistics highlight trends in household statistics from multiple surveys. Data Tools & Apps Main American FactFinder Census Business Builder My Classification Codes (i.e., NAICS) Economic Census Economic Indicators Economic Studies Industry Statistics

  16. Conservation status of polar bears (Ursus maritimus) in relation to projected sea-ice declines

    Science.gov (United States)

    Laidre, K. L.; Regehr, E. V.; Akcakaya, H. R.; Amstrup, S. C.; Atwood, T.; Lunn, N.; Obbard, M.; Stern, H. L., III; Thiemann, G.; Wiig, O.

    2016-12-01

    Loss of Arctic sea ice due to climate change is the most serious threat to polar bears (Ursus maritimus) throughout their circumpolar range. We performed a data-based sensitivity analysis with respect to this threat by evaluating the potential response of the global polar bear population to projected sea-ice conditions. We conducted 1) an assessment of generation length for polar bears, 2) developed of a standardized sea-ice metric representing important habitat characteristics for the species; and 3) performed population projections over three generations, using computer simulation and statistical models representing alternative relationships between sea ice and polar bear abundance. Using three separate approaches, the median percent change in mean global population size for polar bears between 2015 and 2050 ranged from -4% (95% CI = -62%, 50%) to -43% (95% CI = -76%, -20%). Results highlight the potential for large reductions in the global population if sea-ice loss continues. They also highlight the large amount of uncertainty in statistical projections of polar bear abundance and the sensitivity of projections to plausible alternative assumptions. The median probability of a reduction in the mean global population size of polar bears greater than 30% over three generations was approximately 0.71 (range 0.20-0.95. The median probability of a reduction greater than 50% was approximately 0.07 (range 0-0.35), and the probability of a reduction greater than 80% was negligible.

  17. Polar bears: the fate of an icon.

    Science.gov (United States)

    Fitzgerald, Kevin T

    2013-11-01

    Polar bears are one of the most iconic animals on our planet. Worldwide, even people who would never see one are drawn to these charismatic arctic ice hunters. They are the world's largest terrestrial carnivore, and despite being born on land, they spend most of their lives out on the sea ice and are considered a marine mammal. Current global studies estimate there are around 20,000 animals in some 19 discrete circumpolar populations. Aside from pregnant females denning in the winter months to give birth, the white bears do not hibernate. They spend their winters on the sea ice hunting seals, an activity they are spectacularly adapted for. Research on these animals is incredibly difficult because of the inhospitable surroundings they inhabit and how inaccessible they make the bears. For many years, the sum of our understanding of the natural history of polar bears came from tracks, scats, the remains of their kills, abandoned dens, and anecdotal observations of native hunters, explorers, and early biologists. Nonetheless, the last 40 years have seen a much better picture of their biology emerge thanks to, first, dedicated Canadian researchers and, later, truly international efforts of workers from many countries. Veterinarians have contributed to our knowledge of the bears by delivering and monitoring anesthesia, obtaining blood samples, performing necropsies, investigating their reproduction, conducting radiotelemetry studies, and examining their behavior. Recently, new technologies have been developed that revolutionize the study of the lives and natural history of undisturbed polar bears. These advances include better satellite radiotelemetry equipment and the development of remote-controlled miniature devices equipped with high-definition cameras. Such new modalities provide dramatic new insights into the life of polar bears. The remarkable degree of specialized adaptation to life on the sea ice that allowed the bears to be successful is the very reason that

  18. Solid Polarized Targets and Applications

    International Nuclear Information System (INIS)

    Crabb, D. G.

    2008-01-01

    Examples are given of dynamically polarized targets in use today and how the subsystems have changed to meet the needs of todays experiments. Particular emphasis is placed on target materials such as ammonia and lithium deuteride. Recent polarization studies of irradiated materials such as butanol, deuterated butanol, polyethylene, and deuterated polyethylene are presented. The operation of two non-DNP target systems as well as applications of traditional DNP targets are briefly discussed

  19. Polarization bremsstrahlung in α decay

    International Nuclear Information System (INIS)

    Amusia, M. Ya.; Zon, B. A.; Kretinin, I. Yu.

    2007-01-01

    A mechanism of formation of electromagnetic radiation that accompanies α decay and is associated with the emission of photons by electrons of atomic shells due to the scattering of α particles by these atoms (polarization bremsstrahlung) is proposed. It is shown that, when the photon energy is no higher than the energy of K electrons of an atom, polarization bremsstrahlung makes a significant contribution to the bremsstrahlung in α decay

  20. Veterans Affairs Geographic Distribution of Expenditures FY07 by State and County

    Data.gov (United States)

    Department of Veterans Affairs — The Geographic Distribution of VA Expenditures (GDX) is an annual report that shows estimated VA expenditures for major programmatic areas by geographic area (state,...

  1. 27 October 2014 - L. Pistelli Vice Minister at Foreign Affairs and International Cooperation, Italian Republic

    CERN Multimedia

    Guillaume, Jeanneret

    2014-01-01

    Mr Lapo Pistelli Vice Minister at Foreign Affairs and International Cooperation, Member of the Italian Parliament (Chamber of Deputies), Italian Republic, signing the Guest Book with CERN Director-General R. Heuer ; Physics Department Head L. Mapelli also present

  2. Conflict Resolution: The Relationship Between Air Force Public Affairs and Legal Functions

    National Research Council Canada - National Science Library

    Law, James

    1998-01-01

    .... This research examines the relationship between Air Force public affairs and legal functions to find out what conflict exists, how often it occurs, how it is resolved, what the results are for the...

  3. Veterans Affairs Geographic Distribution of Expenditures FY09 by Congressional District

    Data.gov (United States)

    Department of Veterans Affairs — The Geographic Distribution of VA Expenditures (GDX) is an annual report that shows estimated VA expenditures for major programmatic areas by geographic area (state,...

  4. Veterans Affairs Geographic Distribution of Expenditures FY08 by Congressional District

    Data.gov (United States)

    Department of Veterans Affairs — The Geographic Distribution of VA Expenditures (GDX) is an annual report that shows estimated VA expenditures for major programmatic areas by geographic area (state,...

  5. Measuring Relationships: A Model for Evaluating U.S. Air Force Public Affairs Programs

    National Research Council Canada - National Science Library

    Della Vedova, Joseph P

    2005-01-01

    The thesis advanced here is that Air Force Public Affairs should be responsible for managing the organization-public relationship and that the effectiveness of that management can be measured in terms...

  6. 32 CFR Appendix D to Part 45 - State Directors of Veterans Affairs

    Science.gov (United States)

    2010-07-01

    ... 55155. Mississippi President, State Veterans Affairs Board, 120 North State Street, War Memorial..., Trenton, NJ 08608. New Mexico Director, Veterans Service Commission, P.O. Box 2324, Santa Fe, NM 87503...

  7. Department of Veterans Affairs - Monthly Report to Congress of Data Incidents (April 2014)

    Data.gov (United States)

    Department of Veterans Affairs — This is a monthly report that the VA Office of Information Technology provides to congress about data incidents that took place during the month (April 2014). The...

  8. Veterans Affairs Geographic Distribution of Expenditures FY08 by State and County

    Data.gov (United States)

    Department of Veterans Affairs — The Geographic Distribution of VA Expenditures (GDX) is an annual report that shows estimated VA expenditures for major programmatic areas by geographic area (state,...

  9. Cyberwar and Information Warfare: A Revolution in Military Affairs or Much Ado about Not Too Much?

    National Research Council Canada - National Science Library

    Ray, Charles A

    1997-01-01

    .... Looking back on these changes, and at the changes that are being caused by the rapid advances in today's technology, many people assert that we are in the midst of a revolution in military affairs (RMA...

  10. The home front : Internal organization of public affairs in Dutch subnational governments

    NARCIS (Netherlands)

    Figee, Edward L.; Gosselt, Jordi F.; Linders, Paul C.J.; de Jong, Menno D.T.

    2017-01-01

    Dutch subnational governments such as municipalities and provinces are increasingly compelled to express their interests in the national and European political arenas. Effectiveness in these arenas requires an optimal arrangement of Public Affairs (PA) activities in the subnational organization.

  11. 78 FR 26711 - Federal Agricultural Mortgage Corporation Funding and Fiscal Affairs; Farmer Mac Liquidity...

    Science.gov (United States)

    2013-05-08

    ... Funding and Fiscal Affairs; Farmer Mac Liquidity Management ACTION: Proposed rule; reopening of comment... proposed rule that would amend its liquidity management regulations for the Federal Agricultural Mortgage... comment on the proposed liquidity regulations. [[Page 26712

  12. Internet-Mediated Learning in Public Affairs Programs: Issues and Implications.

    Science.gov (United States)

    Rahm, Dianne; Reed, B. J.; Rydl, Teri L.

    1999-01-01

    An overview of Internet-mediated learning in public affairs programs identifies issues for faculty, students, and administrators, including intellectual property rights, instructional issues, learning approaches, student expectations, logistics and support, complexity of coordination, and organizational control. (DB)

  13. The evolution of the Waste Isolation Pilot Plant (WIPP) project's public affairs program

    International Nuclear Information System (INIS)

    Walter, L.H.

    1988-01-01

    As a first-of-a-kind facility, the Waste Isolation Pilot Plant (WIPP) presents a unique perspective on the value of designing a public affairs program that grown with and complements a project's evolution from construction to operations. Like the project itself, the public affairs programs progressed through several stages to its present scope. During the construction phase, foundations were laid in the community. Then, in this past year as the project entered a preoperational status, emphasis shifted to broaden the positive image that had been created locally. In this stage, public affairs presented the project's positive elements to the various state agencies, government officials, and federal organizations involved in our country's radioactive waste management program. Most recently, and continuing until receipt of the first shipment of waste in October 1988, an even broader, more aggressive public affairs program is planned

  14. M2 polarization enhances silica nanoparticle uptake by macrophages

    Directory of Open Access Journals (Sweden)

    Jessica eHoppstädter

    2015-03-01

    Full Text Available While silica nanoparticles have enabled numerous industrial and medical applications, their toxicological safety requires further evaluation. Macrophages are the major cell population responsible for nanoparticle clearance in vivo. The prevailing macrophage phenotype largely depends on the local immune status of the host. Whereas M1-polarized macrophages are considered as pro-inflammatory macrophages involved in host defense, M2 macrophages exhibit anti-inflammatory and wound-healing properties, but also promote tumor growth.We employed different models of M1 and M2 polarization: GM-CSF/LPS/IFN-gamma was used to generate primary human M1 cells and M-CSF/IL-10 to differentiate M2 monocyte-derived macrophages. PMA-differentiated THP-1 cells were polarized towards an M1 type by LPS/IFN-gamma and towards M2 by IL-10. Uptake of fluorescent silica nanoparticles (Ø 26 and 41 nm and microparticles (Ø 1.75 µm was quantified. At the concentration used (50 µg/ml, silica nanoparticles did not influence cell viability as assessed by MTT assay. Nanoparticle uptake was enhanced in M2-polarized primary human monocyte-derived macrophages compared with M1 cells, as shown by flow cytometric and microscopic approaches. In contrast, the uptake of microparticles did not differ between M1 and M2 phenotypes. M2 polarization was also associated with increased nanoparticle uptake in the macrophage-like THP-1 cell line. In accordance, in vivo polarized M2-like primary human tumor-associated macrophages (TAM obtained from lung tumors took up more nanoparticles than M1-like alveolar macrophages isolated from the surrounding lung tissue.In summary, our data indicate that the M2 polarization of macrophages promotes nanoparticle internalization. Therefore, the phenotypical differences between macrophage subsets should be taken into consideration in future investigations on nanosafety, but might also open up therapeutic perspectives allowing to specifically target M2

  15. Comparing the quality of antidepressant pharmacotherapy in the Department of Veterans Affairs and the private sector.

    Science.gov (United States)

    Busch, Susan H; Leslie, Douglas L; Rosenheck, Robert A

    2004-12-01

    Comparing quality of care between large health care systems is important for health systems management. This study compared measures of the quality of pharmacotherapy for patients with major depression across a sample of patients from the Department of Veterans Affairs (VA) and the private sector. In this observational study, all patients who were given a new prescription for an antidepressant and a diagnosis of major depression in the VA during fiscal year 2000 were identified by using administrative data (N=27,713). In the private sector, a similar sample of patients were identified by using Medstat's MarketScan database (N=4,852). For both groups, measures of the quality of antidepressant pharmacotherapy were constructed. These measures were compared across the two groups by using logistic regression models. Controls for age, gender, comorbid disorders, and initial antidepressant drug prescribed were included in some models. Although the populations had different demographic and clinical characteristics, differences in the quality measures between the two systems were few, with the VA slightly outperforming the private sector in the prescription of antidepressants during the acute phase of treatment, the first 84 days (84.7 compared with 81 percent) and during the maintenance phase of treatment, the first 181 days (53.9 compared with 50.9 percent). Patient characteristics that were associated with quality measures included being older, being female, and having a comorbid diagnosis of substance use disorder, bipolar disorder, or anxiety or adjustment disorder. Both systems had relatively high rates of adherence to pharmacotherapy guidelines. Even though the populations in the two systems were different, adjusting the analyses for clinical characteristics did little to change the measured differences between the two systems.

  16. Radiochromic film and polarization effects

    International Nuclear Information System (INIS)

    Yu, P.K.N.; Cheung, T.; Butson, M.J.; Cancer Services, Wollongong, NSW; Inwood, D.

    2004-01-01

    Full text: A new high sensitivity radiochromic film has been tested for its polarization properties. Gafchromic HS film has been shown to produce a relatively small (less than 3%) variation in measured optical density measured at 660nm wavelength when the light source is fully linear polarized and the film is rotated through 360 deg angle. Similar variations are seen when the detector is linearly polarized. If both light source and detector is linearly polarised variations in measured optical density can reach 15% when the film is rotated through 360 deg angle. This seems to be due to a phase shift in polarised light caused by the radiochromic film resulting in the polarised light source becoming out of phase with the polarised detector. Gafchromic HS radiochromic film produces a minimal polarization response with varying angle of rotation however we recommend that a polarization test be performed on a densitometry system to establish the extent of its polarization properties before accuracy dosimetry is performed with radiochromic HS film. Copyright (2004) Australasian College of Physical Scientists and Engineers in Medicine

  17. Polarization in free electron lasers

    Energy Technology Data Exchange (ETDEWEB)

    Papadichev, V.A. [Lebedev Physical Institute, Moscow (Russian Federation)

    1995-12-31

    Polarization of electromagnetic radiation is required very often in numerous scientific and industrial applications: studying of crystals, molecules and intermolecular interaction high-temperature superconductivity, semiconductors and their transitions, polymers and liquid crystals. Using polarized radiation allows to obtain important data (otherwise inaccessible) in astrophysics, meteorology and oceanology. It is promising in chemistry and biology for selective influence on definite parts of molecules in chain synthesis reactions, precise control of various processes at cell and subcell levels, genetic engineering etc. Though polarization methods are well elaborated in optics, they can fail in far-infrared, vacuum-ultraviolet and X-ray regions because of lack of suitable non-absorbing materials and damaging of optical elements at high specific power levels. Therefore, it is of some interest to analyse polarization of untreated FEL radiation obtained with various types of undulators, with and without axial magnetic field. The polarization is studied using solutions for electron orbits in various cases: plane or helical undulator with or without axial magnetic field, two plane undulators, a combination of right- and left-handed helical undulators with equal periods, but different field amplitudes. Some examples of how a desired polarization (elliptical circular or linear) can be obtained or changed quickly, which is necessary in many experiments, are given.

  18. Polarization in heavy quark decays

    Energy Technology Data Exchange (ETDEWEB)

    Alimujiang, K.

    2006-07-01

    In this thesis I concentrate on the angular correlations in top quark decays and their next.to.leading order (NLO) QCD corrections. I also discuss the leading.order (LO) angular correlations in unpolarized and polarized hyperon decays. In the first part of the thesis I calculate the angular correlation between the top quark spin and the momentum of decay products in the rest frame decay of a polarized top quark into a charged Higgs boson and a bottom quark in Two-Higgs-Doublet-Models: t({up_arrow}) {yields} b + H{sup +}. I provide closed form formulae for the O({alpha}{sub s}) radiative corrections to the unpolarized and the polar correlation functions for m{sub b}{ne}0 and m{sub b}=0. In the second part I concentrate on the semileptonic rest frame decay of a polarized top quark into a bottom quark and a lepton pair: t({up_arrow}){yields}X{sub b}+l{sup +}+{nu}{sub l}. I present closed form expressions for the O({alpha}{sub s}) radiative corrections to the unpolarized part and the polar and azimuthal correlations for m{sub b}{ne}0 and m{sub b}=0. In the last part I turn to the angular distribution in semileptonic hyperon decays. Using the helicity method I derive complete formulas for the leading order joint angular decay distributions occurring in semileptonic hyperon decays including lepton mass and polarization effects. (orig.)

  19. Bioelectric modulation of macrophage polarization

    Science.gov (United States)

    Li, Chunmei; Levin, Michael; Kaplan, David L.

    2016-02-01

    Macrophages play a critical role in regulating wound healing and tissue regeneration by changing their polarization state in response to local microenvironmental stimuli. The native roles of polarized macrophages encompass biomaterials and tissue remodeling needs, yet harnessing or directing the polarization response has been largely absent as a potential strategy to exploit in regenerative medicine to date. Recent data have revealed that specific alteration of cells’ resting potential (Vmem) is a powerful tool to direct proliferation and differentiation in a number of complex tissues, such as limb regeneration, craniofacial patterning and tumorigenesis. In this study, we explored the bioelectric modulation of macrophage polarization by targeting ATP sensitive potassium channels (KATP). Glibenclamide (KATP blocker) and pinacidil (KATP opener) treatment not only affect macrophage polarization, but also influence the phenotype of prepolarized macrophages. Furthermore, modulation of cell membrane electrical properties can fine-tune macrophage plasticity. Glibenclamide decreased the secretion and gene expression of selected M1 markers, while pinacidil augmented M1 markers. More interestingly, glibencalmide promoted macrophage alternative activation by enhancing certain M2 markers during M2 polarization. These findings suggest that control of bioelectric properties of macrophages could offer a promising approach to regulate macrophage phenotype as a useful tool in regenerative medicine.

  20. Tracking polar lows in CLM

    Energy Technology Data Exchange (ETDEWEB)

    Zahn, M.; Storch, H. von [Inst. for Coastal Research, GKSS Research Center, Geesthacht (Germany); Meteorological Inst., Univ. of Hamburg (Germany)

    2008-08-15

    Polar lows are severe cyclones in sub-polar oceans sized beyond the resolved scale of existing global reanalysis products. We used the NCEP/NCAR reanalyses data to drive a regional climate model (CLM) in order to reproduce finer resolved atmospheric fields over the North Atlantic over a two year period. In these fields we detected polar lows by means of a detection algorithm based on a spatial digital bandpass filter. CLM was run in two different ways, the conventional way and with additionally prescribing the analysed large scale situation. The resulting temporal and spatial distributions of polar lows between the different simulations are compared. A reasonable seasonal cycle and spatial distribution was found for all simulations. A lower number of polar lows in the spectral nudged simulation indicates a closer vicinity to reality. Higher temporal and spatial variability between the conventional simulations suggest a more random generation of polar lows. Frequency distributions of track-lengths reveal shorter tracks when nudging is applied. Maximum wind speeds reveal only minor, insignificant differences between all runs and are higher in conventional mode. (orig.)