WorldWideScience

Sample records for survey forms returned

  1. NMFS Reef Survey Forms

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Reef Environmental Survey Project (REEF) mission to educate and enlist divers in the conservation of marine habitats is accomplished primarily through its Fish...

  2. A survey on risk-return analysis

    OpenAIRE

    Don U.A. Galagedera

    2004-01-01

    This paper provides a review of the main features of asset pricing models. The review includes single-factor and multifactor models, extended forms of the Capital Asset Pricing Model with higher order co- moments, and asset pricing models conditional on time-varying volatility.

  3. Contemporary Poetic Ecologies and a Return to Form

    Directory of Open Access Journals (Sweden)

    Daniel Weston

    2016-04-01

    Full Text Available Ecology is currently coming under increasing poetic scrutiny in a range of terms (landscape, place, environment. Critical responses to this poetry commonly assume a relationship between form and content, wherein textual ecology – the shape of the poem on the page, the spatial and sonic relationship that its parts bear to one another – mimics or otherwise expresses the ecology that the poem describes. Most often, this has been taken to mean that a freer verse style reflects real-world ecologies better by escaping the artificial, cultural constructs of metered verse, and replacing them with more ‘natural’ free verse rhythms. The role of the lyric ‘I’ has also come under examination in much of this poetry and in accompanying criticism: experimental landscape poetry often dispenses with its explicit presence in the poem (even if its implicit influence is much more difficult to eradicate. However, these lines of thinking might not take advantage of the fullest sense of ‘ecology’. This article argues that the continued presence of inherited (‘traditional’ poetic forms (metres and rhythms has been overlooked in contemporary poetry addressing this set of concerns. A number of poets are noticing the way in which form can be harnessed – adapted rather than slavishly adhered to – in creating poetic ecologies. In particular, I look at sonnets or sonnet-like forms in recent poems explicitly concerned with nature, place, and environment by Jo Shapcott, Jen Hadfield, and Kathleen Jamie. In light of the environmental concerns that these poets address, the ghost of metre to be found in their work might signal an uneasy relationship between human, ‘cultural’ and non-human, ‘natural’ actors in ecology. I aim to notice a trend in contemporary poetic ecologies and offer redress to the ways in which a return to form might have been overlooked in critical discussions of the topic.

  4. 46 CFR 308.547 - Application for return premium, Form MA-317.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 8 2010-10-01 2010-10-01 false Application for return premium, Form MA-317. 308.547... for return premium, Form MA-317. An application for the return of premium must be filed in duplicate with the Underwriting Agent on Form MA-317, which may be obtained from the American War Risk Agency...

  5. Placeholders dissociate two forms of inhibition of return.

    Science.gov (United States)

    Hilchey, Matthew D; Pratt, Jay; Christie, John

    2016-10-26

    Decades of research using Posner's classic spatial cueing paradigm has uncovered at least two forms of inhibition of return (IOR) in the aftermath of an exogenous, peripheral orienting cue. One prominent dissociation concerns the role of covert and overt orienting in generating IOR effects that relate to perception- and action-oriented processes, respectively. Another prominent dissociation concerns the role of covert and overt orienting in generating IOR effects that depend on object- and space-based representation, respectively. Our objective was to evaluate whether these dichotomies are functionally equivalent by manipulating placeholder object presence in the cueing paradigm. By discouraging eye movements throughout, Experiments 1A and 1B validated a perception-oriented form of IOR that depended critically on placeholders. Experiment 2A demonstrated that IOR was robust without placeholders when eye movements went to the cue and back to fixation before the manual response target. In Experiment 2B, we replicated Experiment 2A's procedures except we discouraged eye movements. IOR was observed, albeit only weakly and significantly diminished relative to when eye movements were involved. We conclude that action-oriented IOR is robust against placeholders but that the magnitude of perception-oriented IOR is critically sensitive to placeholder presence when unwanted oculomotor activity can be ruled out.

  6. 1980 Bald Eagle Midwinter Survey Field Form

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Bald Eagle Midwinter Survey Field Form and map of survey area. Includes Bald and Golden Eagles. Each observer given area to cover and stayed in same location until...

  7. 46 CFR 308.527 - Application for return premium, Form MA-307.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 8 2010-10-01 2010-10-01 false Application for return premium, Form MA-307. 308.527... for return premium, Form MA-307. An application for the return of premium, which may be obtained from... MA-307....

  8. Surveys of ISS Returned Hardware for MMOD Impacts

    Science.gov (United States)

    Hyde, James; Christiansen, E.; Lear, D.; Nagy, K.

    2017-01-01

    Since February 2001, the Hypervelocity Impact Technology (HVIT) group at the Johnson Space Center in Houston has performed 26 post-flight inspections on space exposed hardware that have been returned from the International Space Station. Data on 1,024 observations of MMOD damage have been collected from these inspections. Survey documentation typically includes impact feature location and size measurements as well as microscopic photography (25-200x). Sampling of impacts sites for projectile residue was performed for the largest features. Results of Scanning Electron Microscopy (SEM) analysis to discern impactor source is included in the database. This paper will summarize the post-flight MMOD inspections, and focus on two inspections in particular: (1) Pressurized Mating Adapter-2 (PMA-2) cover returned in 2015 after 1.6 years exposure with 26 observed damages, and (2) Airlock shield panels returned in 2010 after 8.7 years exposure with 58 MMOD damages. Feature sizes from the observed data are compared to predictions using the Bumper risk assessment code.

  9. Surveys of Returned ISS Hardware for MMMOD Impacts

    Science.gov (United States)

    Hyde, J. L.; Christiansen, E. L.; Lear, D. M.; Nagy, K.; Berger, E. L.

    2017-01-01

    Since February 2001, the Hypervelocity Impact Technology (HVIT) group at the Johnson Space Center (JSC) in Houston has performed 35 post-flight inspections on space exposed hardware returned from the International Space Station (ISS). Data on 1,188 observations of micrometeoroid and orbital debris (MMOD) damage have been collected from these inspections. Survey documentation typically includes impact feature location and size measurements as well as microscopic photography (25-200x). Sampling of impacts sites for projectile residue was performed for the largest features. Results of energy dispersive X-ray spectroscopic analysis to discern impactor source are included in the database when available. This paper will focus on two inspections, the Pressurized Mating Adapter 2 (PMA-2) cover returned in 2015 after 1.6 years exposure with 26 observed impact features, and two Airlock shield panels returned in 2010 after 8.75 years exposure with 58 MMOD impacts. Feature sizes from the observed data are compared to predictions using the Bumper 3 risk assessment code.

  10. Technetium Immobilization Forms Literature Survey

    Energy Technology Data Exchange (ETDEWEB)

    Westsik, Joseph H.; Cantrell, Kirk J.; Serne, R. Jeffrey; Qafoku, Nikolla

    2014-05-01

    Of the many radionuclides and contaminants in the tank wastes stored at the Hanford site, technetium-99 (99Tc) is one of the most challenging to effectively immobilize in a waste form for ultimate disposal. Within the Hanford Tank Waste Treatment and Immobilization Plant (WTP), the Tc will partition between both the high-level waste (HLW) and low-activity waste (LAW) fractions of the tank waste. The HLW fraction will be converted to a glass waste form in the HLW vitrification facility and the LAW fraction will be converted to another glass waste form in the LAW vitrification facility. In both vitrification facilities, the Tc is incorporated into the glass waste form but a significant fraction of the Tc volatilizes at the high glass-melting temperatures and is captured in the off-gas treatment systems at both facilities. The aqueous off-gas condensate solution containing the volatilized Tc is recycled and is added to the LAW glass melter feed. This recycle process is effective in increasing the loading of Tc in the LAW glass but it also disproportionally increases the sulfur and halides in the LAW melter feed which increases both the amount of LAW glass and either the duration of the LAW vitrification mission or the required supplemental LAW treatment capacity.

  11. Consent Form Return Rates for Third-Grade Urban Elementary Students

    Science.gov (United States)

    Ji, Peter; Flay, Brian R.; Phil, D.; DuBois, David L.; Brechling, Vanessa; Day, Joseph; Cantillon, Dan

    2006-01-01

    Objective: To maximize active parent consent form return rates for third-grade minority, urban students enrolled in predominantly low-income elementary schools in Chicago, Ill. Methods: Research staff used a class incentive and class visits to retrieve consent forms from students. Results: Of the 811 third-grade students, 98% returned a form and …

  12. Different forms, reasons and motivations for return migration of persons who voluntarily decide to return to their countries of origin.

    Science.gov (United States)

    Kraus, R

    1986-03-01

    Refugees seek asylum in the People's Republic of Germany with high hopes for economic and social prosperity. Those refugees who choose to return to their countries of origin leave with dashed hopes and feeling homesick and out of place; they also feel uncertain, insecure, and despondent when they think of the difficulties awaiting them at home because they have asked for asylum. The People's Republic of Germany is exploring means to motivate those seeking asylum there to return voluntarily to their countries of origin. This article discusses and evaluates 2 model projects that focus on counseling and reintegrating refugees who choose to return to their homelands. The 1st model project took place from 1980-1983. It returned 1887 asylum seekers, mostly Pakistanis and Indians, to their homelands. Reintegration assistance was to be administered in 5 phases: 1) counseling and motivation in the Federal Republic of Germany, 2) 3 months of reintegration training at a training center in Germany, 3) return migration assistance, 4) counseling and followup assistance in the country of origin, and 5) evaluation of experience and communication of findings. 2 major conclusions were drawn from this project: 1) Steps must be taken to obtain rapid return of economic refugees; this would better serve political refugees who are entitled to asylum. 2) Reintegrated refugees must participate in extensive information programs in their homelands to persuade other economic refugees not to leave their countries. 273 Turkish refugees were interviewed in the 2nd project. The project concluded that reintegration motivation may be attained by 1) providing basic information on asylum seekers, 2) counseling to promote willingness to return home, 3) offering practical assistance to return home, and 4) introducing regulations discouraging economic refugees. The author concludes that the training installations in the People's Republic of Germany are unacceptable because they create incentives for

  13. The ‘universal library’ returns in digital form

    Directory of Open Access Journals (Sweden)

    Andy White

    2009-04-01

    Full Text Available This paper begins with two contemporary technological developments both of which present a serious challenge to the dominance in literature and learning of the book in its codex form. While their earlier manifestations were not commercially successful, the most recent e-book readers (portable technological contraptions that have the capacity to store thousands of books that can be read electronically have been praised not only for their functionality but also for their aesthetic appeal. A related development has been the growth of large-scale digital libraries, the most prominent of which is the Google Books Library Project, launched in 2004 and now committed to the digitisation of around 15 million volumes or 4.5 billion pages in the following six years from some of the world’s leading academic libraries. The purpose of this paper is to explore these developments within the context of ancient and Enlightenment ideas about the ‘universal library’ which assert that the construction of such an institution is the most effective way of promoting universal knowledge. Rather than employing a kind of technological determinism that renders these technologies as merely points along an inexorable continuum of progress, it will be argued that they are the latest manifestation of an idea that long pre-dated digital technology. Over two millennia ago, the Ptolemies attempted to collect the entire corpus of literature in the Greek language as well as significant works in other languages. Many have argued that the institution that held these huge collections, the library at Alexandria, was effectively the world’s first universal library. Even though this library was eventually destroyed, the idea of universalism survived and flourished again during the European Enlightenment, through Diderot’s Encyclopédie project and the construction of national libraries and archives. Latterly, the creation of the World Wide Web is conceived of by some as the

  14. 26 CFR 31.6051-2 - Information returns on Form W-3 and Internal Revenue Service copies of Forms W-2.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 15 2010-04-01 2010-04-01 false Information returns on Form W-3 and Internal Revenue Service copies of Forms W-2. 31.6051-2 Section 31.6051-2 Internal Revenue INTERNAL REVENUE SERVICE... returns on Form W-3 and Internal Revenue Service copies of Forms W-2. (a) In general. Every employer...

  15. Mail Survey Return Rates Published in Health Education Journals: An Issue of External Validity

    Science.gov (United States)

    Price, James H.; Murnan, Judy; Dake, Joseph A.; Dimmig, Jaime; Hayes, Mary

    2004-01-01

    This study assessed mail survey return rates published in seven general health education journals for the 13-year period, 1990-2002: "American Journal of Health Behavior," "American Journal of Health Education," "American Journal of Health Promotion," "Health Education & Behavior," "Health Education Research," "Journal of American College Health,"…

  16. Attitudes towards disability management: A survey of employees returning to work and their supervisors.

    Science.gov (United States)

    Busse, Jason W; Dolinschi, Roman; Clarke, Andrew; Scott, Liz; Hogg-Johnson, Sheilah; Amick, Benjamin C; Rivilis, Irina; Cole, Donald

    2011-01-01

    Return to work after a leave on disability is a common phenomenon, but little is known about the attitudes of employees or their supervisors towards the disability management process. We report on employee and supervisor feedback from one disability management experience. 389 consecutive employees from the Ontario offices of a single private Canadian insurance company returning to work from short-term disability, and their supervisors. We surveyed employees and their supervisors about their experience with, and attitudes towards, the disability management process. Of those surveyed, 88 employees and 75 supervisors provided data (response rates of 22.6% and 19.3% respectively). The majority of respondents (79.1% of employees and supervisors) endorsed positive attitudes towards their disability management experience. More than 25% of employees disagreed with the following three items: case managers contributed to recovery, case managers removed barriers to recovery, and sufficient support was provided in the return to work process. More than 25% of employees and managers reported that a commitment to modify an unhelpful work situation was not followed through. The majority of participating employees returning to work from short-term disability, and their supervisors, reported a high level of satisfaction with the disability management process. Areas that may benefit from attention include some aspects of case manager-employee interaction and ensuring that support during the return to work process is provided, including modification to work situations when appropriate.

  17. Survey of nucleon electromagnetic form factors

    Energy Technology Data Exchange (ETDEWEB)

    Perdrisat, Charles F. [William and Mary College; Punjabi, Vina A. [Norfolk State U.

    2011-09-20

    There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has been greatly improved by performing double polarization experiments, in compar- ison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at MIT-Bates, MAMI, and JLab. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed.

  18. Colorado cultural resource survey: Management data form [5JA784

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document includes the survey forms necessary to assess cultural resources in Colorado. This document assesses the Lewis children graves (site # 5JA1478) on...

  19. Colorado cultural resource survey: Management data form [5JA784

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document includes the survey forms necessary to assess cultural resources in Colorado. This document assesses the Allard Ranch (site # 5JA784, temporary #...

  20. The Stock Exchange of Suriname: Returns, Volatility, Correlations and Weak-form Efficiency

    OpenAIRE

    Bodeutsch, Denice; Franses, Philip Hans

    2014-01-01

    markdownabstract__Abstract__ The empirical properties of stock returns are studied for 10 companies listed at the Suriname Stock Exchange (SSE), which is a young and growing stock market. Individual stock returns are found to be predictable from the own past to some extent, but the equal-weighted index returns are not. Dynamic correlations with large Latin-American stock markets appear to be zero. It is concluded that there is much more efficiency to be gained for the SSE.

  1. Typical Survey and Research on Returning-home Migrant Workers’ Entrepreneurship in Jiangxi Province under Post-financial Crisis

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    In order to study the entrepreneurship situation of Jiangxi return migrant workers after the financial crisis,we have conducted a survey on 107 entrepreneurial return migrant workers in 6 counties of Jiangxi Province.The results show that the return of migrant workers is mainly attributed to personal factors,while social factors are also very important.The major difficulties facing return migrant workers are the funding difficulties,complicated formalities to start a business,difficulty in safeguarding their rights and interests,their own low quality and so on.The support needed by the return migrant workers from the government is manifested in five aspects,say,to improve the service and management for the entrepreneurship of migrant workers,to provide financing policy support,to increase the preferential fiscal and taxation policies,to enhance the entrepreneurship training and to provide preference for the return migrant workers to use land.

  2. The Stock Exchange of Suriname: Returns, Volatility, Correlations and Weak-form Efficiency

    NARCIS (Netherlands)

    D.S. Bodeutsch (Denice); Ph.H.B.F. Franses (Philip Hans)

    2014-01-01

    markdownabstract__Abstract__ The empirical properties of stock returns are studied for 10 companies listed at the Suriname Stock Exchange (SSE), which is a young and growing stock market. Individual stock returns are found to be predictable from the own past to some extent, but the equal-weighted

  3. The Stock Exchange of Suriname: Returns, Volatility, Correlations and Weak-form Efficiency

    NARCIS (Netherlands)

    D.S. Bodeutsch (Denice); Ph.H.B.F. Franses (Philip Hans)

    2014-01-01

    markdownabstract__Abstract__ The empirical properties of stock returns are studied for 10 companies listed at the Suriname Stock Exchange (SSE), which is a young and growing stock market. Individual stock returns are found to be predictable from the own past to some extent, but the

  4. Dynamic Concept of Returns to Scales and Its Characteristics on Production Frontier in Intersection Form

    Institute of Scientific and Technical Information of China (English)

    Quan-ling Wei; Hong Yan

    2011-01-01

    This paper gives a dynamic concept and a new non-parametric method for evaluating returns to scale (RTS) of economic units with multiple inputs and outputs. It is frequently noticed that when we increase the input of a decision making unit (DMU) with a certain status of RTS, different status of RTS is observed. For example, when we increase the input of a DMU with constant RTS under the traditional method, a decreasing RTS is often observed instead of the expected constant RTS. We thus define the RTS of each DMU in both input expansion and contraction regions respectively. The research starts from transferring the production possibility set into the intersection form, by giving the explicit linear inequality representation of production frontiers. The RTS structural characteristics of DMUs' on the production frontier are described. Status of RTS of those DMUs on the production frontier include increasing RTS, constant RTS, decreasing RTS, saturated RTS and evidence of congestion. Necessary and sufficient conditions for RTS evaluation are provided. The definition and evaluation method given here provide more detailed economic characteristics of DMU for policy makers.

  5. 76 FR 18649 - Technical Revisions to Actuarial Information on Form 5500 Annual Return/Report for Pension Plans...

    Science.gov (United States)

    2011-04-05

    ... Form 5500 Annual Return/Report for Pension Plans Electing Funding Alternatives Under Pension Relief Act... defined benefit pension plans under the Preservation of Access to Care for Medicare Beneficiaries and Pension Relief Act of 2010 (Pension Relief Act). The information that would be required either by way of...

  6. Will kinematic Sunyaev-Zel'dovich measurements enhance the science return from galaxy redshift surveys?

    Science.gov (United States)

    Sugiyama, Naonori S.; Okumura, Teppei; Spergel, David N.

    2017-01-01

    Yes. Future CMB experiments such as Advanced ACTPol and CMB-S4 should achieve measurements with S/N of > 0.1 for the typical host halo of galaxies in redshift surveys. These measurements will provide complementary measurements of the growth rate of large scale structure f and the expansion rate of the Universe H to galaxy clustering measurements. This paper emphasizes that there is significant information in the anisotropy of the relative pairwise kSZ measurements. We expand the relative pairwise kSZ power spectrum in Legendre polynomials and consider up to its octopole. Assuming that the noise in the filtered maps is uncorrelated between the positions of galaxies in the survey, we derive a simple analytic form for the power spectrum covariance of the relative pairwise kSZ temperature in redshift space. While many previous studies have assumed optimistically that the optical depth of the galaxies τT in the survey is known, we marginalize over τT, to compute constraints on the growth rate f and the expansion rate H. For realistic survey parameters, we find that combining kSZ and galaxy redshift survey data reduces the marginalized 1-σ errors on H and f to ~50-70% compared to the galaxy-only analysis.

  7. 78 FR 69086 - Federal Acquisition Regulation; Submission for OMB Review; Preaward Survey Forms (Standard Forms...

    Science.gov (United States)

    2013-11-18

    ... will be posted without change to http://www.regulations.gov , including any personal and/or business... Forms 1403, 1404, 1405, 1406, 1407, and 1408 in detail commensurate with the dollar value and complexity... Government that bears the burden of the effort. The Government's work in conducting a preaward survey is not...

  8. NEMO: A mission to search for and return to Earth possible life forms on Europa

    Science.gov (United States)

    Powell, Jesse; Powell, James; Maise, George; Paniagua, John

    2005-07-01

    The Nuclear Europa Mobile Ocean (NEMO) mission would land on the surface of Europa, and deploy a small, lightweight melt probe powered by a compact nuclear reactor to melt down through the multi-kilometer ice sheet. After reaching the sub-surface ocean, a small nuclear Autonomous Underwater Vehicle (AUV) would deploy to explore the sub-ice ocean. After exploration and sample collection, the AUV would return to the probe and melt back to the lander. The lander would have replenished its H2 propellant by electrolysis of H2O ice, and then hop to a new site on Europa to repeat the probe/AUV process. After completing the mission, the NEMO spacecraft would return to Earth with its collected samples. The NEMO melt probe and AUV utilize enriched U-235 fuel and conventional water reactor technology. The lander utilizes a compact nuclear thermal propulsion (NTP) engine based on the 710tungsten/UO2 cermet fuel and high-temperature H2 propellant. The compact nuclear reactors in both the NEMO melt probe and AUV drive a steam power cycle, generating over 10 kW(e) for use in each. Each nuclear reactor's operating lifetime is several years. With its high-mobility and long-duration mission, NEMO provides an ideal platform for life detection experiments.

  9. Will Kinematic Sunyaev-Zel'dovich Measurements Enhance the Science Return from Galaxy Redshift Surveys?

    CERN Document Server

    Sugiyama, Naonori S; Spergel, David N

    2016-01-01

    Yes. Future CMB experiments such as Advanced ACTPol and CMB-S4 should achieve measurements with S/N of $> 0.1$ for the typical galaxies in redshift surveys. These measurements will provide complementary measurements of the growth rate of large scale structure $f$ and the expansion rate of the Universe $H$ to galaxy clustering measurements. This paper emphasizes that there is significant information in the anisotropy of the relative pairwise kSZ measurements. We expand the relative pairwise kSZ power spectrum in Legendre polynomials and consider up to its octopole. Assuming that the noise in the filtered maps is uncorrelated between the positions of galaxies in the survey, we derive a simple analytic form for the power spectrum covariance of the relative pairwise kSZ temperature in redshift space. While many previous studies have assumed optimistically that the optical depth of the galaxies $\\tau_{\\rm T}$ in the survey is known, we marginalize over $\\tau_{\\rm T}$, to compute constraints on the growth rate $f$ ...

  10. Research on the kinetic energy ratio of return air entrainment in the form of low supply–middle return in the large space of brine experiments

    Directory of Open Access Journals (Sweden)

    Xin Wang

    2015-09-01

    Full Text Available Introduced in this article is a 1:15 brine model experiment rig with an actual large space building as the research object, which provides different concentration brine for a simulation of the stratified air conditioning in the steady-state flow field featured with columnar air supply in the bottom, heat source on the ground, the central air return, and air exhaust from roof in a large space. According to the similarity theory, it is concluded that the similarity criterion numbers applied here are Reynolds number (Re and Archimedes number (Ar for designation of experiment rig size, choosing device type, and confirming experiment condition. In the designation of key components of experiment rig, the application of automation control makes brine recovery and recycling in the process; designation of electrical control system makes a centralized control of experiment start–stop and the adjustment of the pipeline flow, realizing automation in the whole experiment process. Particle image velocimetry testing technology is used to get velocity vector field of air return mouth area in the model under various working conditions, and also proper orthogonal decomposition method is applied to analyze flow field structure of air return mouth area and reconstruct it. Consequently, we can get a kinetic energy ratio of return air entrainment of lower air-conditioning section and upper non-air-conditioning section in large space. Experiments show that under the conditions of same air supply, indoor environment temperature difference, and height and direction of return air inlet, fastening the speed of return air suction, the entrainment of flow field around it strengthens accordingly. The entrainment of return air inlet has more kinetic energy in the lower air-conditioning section than the upper non-air-conditioning section.

  11. 26 CFR 1.6052-1 - Information returns regarding payment of wages in the form of group-term life insurance.

    Science.gov (United States)

    2010-04-01

    ... in the form of group-term life insurance. 1.6052-1 Section 1.6052-1 Internal Revenue INTERNAL REVENUE... § 1.6052-1 Information returns regarding payment of wages in the form of group-term life insurance. (a... employees remuneration for services in the form of group-term life insurance on the life of such...

  12. The various forms, reasons and motivations for return migration of persons who voluntarily decide to return to their countries of origin.

    Science.gov (United States)

    Ohndorf, W

    1986-03-01

    In the Federal Republic of Germany, the government's efforts to integrate foreigners wishing to stay in the country have as a precondition that the number of foreigners taken as a whole will remain at approximately the same level. In September 1974, the foreign resident population in the Federal Republic of Germany amounted to about 4.127 million; by September 1985 it had risen to 4.365 million. Behind this slight increase is hidden a considerable flow of migrants in both directions. During the period 1974-1984, there were a record 4.774 million arrivals and 5.124 million departures. Thus, the increase in the foreign resident population is attributable entirely to the foreign children born. Since 1% of foreigners are expelled, the 5.1 million departures were almost exclusively voluntary decisions to return to their countries of origin. A bill adopted by the Federal Government in 1983, and which expired in 1984, promoted the willingness of migrants in the Federal Republic of Germany to return to their countries of origin. 2 of its particularly strong incentives follow: 1) Return assistance for all foreigners who had become unemployed as a result of bankruptcy and the closing down of a factory or firm for foreigners who had worked at least 6 months on shortened hours was covered. If a foreigner and his family permanently left the Republic before September 30, 1984, he received DM 10,500 plus DM 1500 for each dependent child. About 39,000 foreigners together with their families returned to their home countries with this incentive. 2) Payment of the employers' contribution to the official social security fund was made. More than 250,000 foreigners together with their families left the Republic under this scheme. Another bill to provide returning foreigners with building savings loans for housing construction is expected to go into effect at the beginning of 1986. Foreigners from other than the European Community member states are entitled to benefit from this plan

  13. 76 FR 9810 - Agency Information Collection Activities: Comment Request for the Ferrous Metals Surveys (17 Forms)

    Science.gov (United States)

    2011-02-22

    ... Geological Survey Agency Information Collection Activities: Comment Request for the Ferrous Metals Surveys... OMB Control Number: 1028-0068. Form Number: Various (17 forms). Title: Ferrous Metals Surveys. Type of... minerals producers of ferrous and related metals. Respondent Obligation: Voluntary. Frequency of Collection...

  14. Policy implications and impact of household registration system on Peasants’ Willingness to return rural residential lands: Evidence from household survey in rural China

    Directory of Open Access Journals (Sweden)

    Hengzhou Xu

    2016-01-01

    Full Text Available Despite a growing body of literature on China’s household registration system and rural land transfer, few studies have examined the impact of the household registration system on peasants’ willingness to return rural residential land. This paper aims to fill this gap and uses household survey data to measure the impacts of household registration system on peasants’ willingness to return rural residential land. The results show that the household registration system reduced the farmers’ enthusiasm to exit the rural residential land, that is, household registration system had a significant negative impact on farmers’ willingness to return rural residential land.

  15. APEX survey of southern high mass star forming regions

    CERN Document Server

    Hieret, C; Menten, K M; Schilke, P; Thorwirth, S; Wyrowski, F

    2007-01-01

    A systematic study of a large sample of sources, covering a wide range in galactocentric distances, masses and luminosities, is a fast and efficient way of obtaining a good overview of the different stages of high-mass star formation. With these goals in mind, we have started a survey of 40 color selected IRAS sources south of -20 degrees declination with the APEX telescope on Chajnantor, Chile. Our first APEX results already demonstrate that the selection criteria were successful, since some of the sources are very rich in molecular lines.

  16. An ALMA Survey of Planet Forming Disks in Rho Ophiuchus

    Science.gov (United States)

    Guilfoil Cox, Erin; Looney, Leslie; Harris, Robert J.; Dong, Jiayin; Segura-Cox, Dominique; Tobin, John J.; Sadavoy, Sarah; Li, Zhi-Yun; Dunham, Michael; Perez, Laura M.; Chandler, Claire J.; Kratter, Kaitlin M.; Melis, Carl; Chiang, Hsin-Fang

    2017-01-01

    Relatively evolved (~ 1 Myr old) protostars with little residual natal envelope, but massive disks, are commonly assumed to be the sites of ongoing planet formation. Critical to our study of these objects is information about the available mass reservior and dust structure, as they directly tie in to how much mass is available for planets as well as the modes of planet formation that occur (i.e., core-accretion vs. gravitational instability). Millimeter-wave observations provide this critical information as continuum emission is relatively optically thin, allowing for mass estimates, and the availability of high-resolution interferometry, allowing structure constraints. We present high-resolution observations of the population of Class II protostars in the Rho-Ophiuchus cloud (d ~ 130 pc). Our survey observed ~50 of these older protostars at 870µm, using the Atacama Large Millimeter/submillimeter Array (ALMA). Out of these sources, there are ~10 transition disks, where we see a ring of dust emission surrounding the central protostar -- indicative of ongoing planet formation -- as well as many binary systems. Both of these stages have implications for star and planet formation. We present results from both 1-D and 2-D disk modeling, where we try to understand disk substructure that might indicate on-going planet formation, in particular, transition disk cavities, disk gaps, and asymmetries in the dust emission.

  17. E-mail survey with an attached Form: an off-line data collection alternative via the internet

    Directory of Open Access Journals (Sweden)

    Alexandre Reis Graeml

    2008-09-01

    Full Text Available As people start incorporating the Internet in their daily routine, using its resources to carry out their usual activities, it becomes easier to use the Web's environment also to collect data by means of electronic surveys. This paper reports the use of a quantitative research survey, which used an "intelligent" MS Word form, which was sent through e-mail to industrial manufacturers in the state of Sao Paulo - Brazil. The response speed was much better than usually achieved using the conventional procedure of sending the survey through regular mail. The return rate was satisfactory and the cost was much lower than usually incurred, due to the virtualization of the contact with the respondent. The initiative was so successful that the authors decided to share their experience with the academic community, contributing to the maturing of the e-mail survey methodology. Although the focus of this study was strictly academic, the authors believe that the adopted procedures are also suitable for market research, feedback gathering and other entrepreneurial needs.

  18. The Close AGN Reference Survey (CARS) - Mrk 1018 returns to the shadows after 30 years as a Seyfert 1

    CERN Document Server

    McElroy, R E; Croom, S M; Davis, T A; Bennert, V N; Busch, G; Combes, F; Eckart, A; Perez-Torres, M; Powell, M; Scharwachter, J; Tremblay, G R; Urrutia, T

    2016-01-01

    We report the discovery that the known `changing look' AGN Mrk 1018 has changed spectral type for a second time. New VLT-MUSE data taken in 2015 as part of the Close AGN Reference Survey (CARS) shows that the AGN has returned to its original Seyfert 1.9 classification. The CARS sample is selected to contain only bright type 1 AGN, but Mrk 1018's broad emission lines and continuum, typical of type 1 AGN, have almost entirely disappeared. We use spectral fitting of the MUSE spectrum and previously available spectra to determine the drop in broad line flux and the Balmer decrement. We find that the broad line flux has decreased by a factor of 4.75+/- 0.5 in H{\\alpha} since an SDSS spectrum was taken in 2000. The Balmer decrement has not changed significantly implying no enhanced reddening with time, but the remaining broad lines are more asymmetric than those present in the type 1 phase. We posit that the change is due to an intrinsic drop in flux from the accretion disk rather than variable extinction or a tida...

  19. Colorado cultural resource survey: cultural resource re-evaluation form [5JA784

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document includes the survey forms necessary to assess cultural resources in Colorado. This document assesses the Allard ranch (5JA784) on Arapaho National...

  20. Colorado cultural resource survey: cultural resource re-evaluation form [5JA783

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — This document includes the survey forms necessary to assess cultural resources in Colorado. This document assesses the Case ranch (5JA783) on Arapaho National...

  1. To return permanently or to return temporarily?: Explaining migrants' intentions

    NARCIS (Netherlands)

    Bilgili, Ö.; Siegel, M.

    2014-01-01

    This paper studies migrants' intentions to return to their origin country by making the distinction between permanent return, temporary return and participation in temporary return programmes. Using survey data from first generation migrants in the Netherlands, we explore how migrants' experiences r

  2. Shortening a survey and using alternative forms of prenotification: Impact on response rate and quality

    Directory of Open Access Journals (Sweden)

    Jenkins Sarah

    2010-06-01

    Full Text Available Abstract Background Evidence suggests that survey response rates are decreasing and that the level of survey response can be influenced by questionnaire length and the use of pre-notification. The goal of the present investigation was determine the effect of questionnaire length and pre-notification type (letter vs. postcard on measures of survey quality, including response rates, response times (days to return the survey, and item nonresponse. Methods In July 2008, the authors randomized 900 residents of Olmsted County, Minnesota aged 25-65 years to one of two versions of the Talley Bowel Disease Questionnaire, a survey designed to assess the prevalence of functional gastrointestinal disorders (FGID. One version was two pages long and the other 4 pages. Using a 2 × 2 factorial design, respondents were randomized to survey length and one of two pre-notification types, letter or postcard; 780 residents ultimately received a survey, after excluding those who had moved outside the county or passed away. Results Overall, the response rates (RR did not vary by length of survey (RR = 44.6% for the 2-page survey and 48.4% for the 4-page or pre-notification type (RR = 46.3% for the letter and 46.8% for the postcard. Differences in response rates by questionnaire length were seen among younger adults who were more likely to respond to the 4-page than the 2-page questionnaire (RR = 39.0% compared to 21.8% for individuals in their 20s and RR = 49.0% compared to 32.3% for those in their 30s. There were no differences across conditions with respect to item non-response or time (days after mailing to survey response. Conclusion This study suggests that the shortest survey does not necessarily provide the best option for increased response rates and survey quality. Pre-notification type (letter or postcard did not impact response rate suggesting that postcards may be more beneficial due to the lower associated costs of this method of contact.

  3. An Exploration of the Factors Considered When Forming Expectations for Returning to Work following Sickness Absence Due to a Musculoskeletal Condition.

    Directory of Open Access Journals (Sweden)

    Amanda E Young

    Full Text Available Workers' own expectations for returning to work following a period of sickness absence have been found to be one of the best predictors of future work status; however, there is a limited understanding of why people expect what they do. The current study was undertaken with the aim of determining what people take into consideration when forming their expectations for returning to work.Thirty-four people (8 women, 26 men, who were off work due to a musculoskeletal condition, participated in one of 14 focus groups. Participants were aged 25 to 65 (M = 45, SD = 12.6, and all had been out of work for 3 months or less.All participants reported expecting to return to work, with the most common timeframe being approximately 30 days (Range = 1 day-12 months. When explaining what they thought about when forming their expectations, participants referenced numerous considerations. Much of what was spoken about could be compartmentalized to reflect features of themselves, their condition, or their broader environmental contexts. Participant's subjective experience of these features influenced his or her expectations. Prominent themes included concerns about employability, a desire to get back to normal, no job to go back to, mixed emotions, re-injury concerns, the judgments of workplace stakeholders, being needed by their employer, waiting for input, until the money runs out, and working out what was in their best interest.Indications are that many of the reported considerations are amenable to intervention, suggesting opportunities to assist workers in the process of returning to work.

  4. The patient safety climate in healthcare organizations (PSCHO) survey: Short-form development.

    Science.gov (United States)

    Benzer, Justin K; Meterko, Mark; Singer, Sara J

    2017-08-01

    Measures of safety climate are increasingly used to guide safety improvement initiatives. However, cost and respondent burden may limit the use of safety climate surveys. The purpose of this study was to develop a 15- to 20-item safety climate survey based on the Patient Safety Climate in Healthcare Organizations survey, a well-validated 38-item measure of safety climate. The Patient Safety Climate in Healthcare Organizations was administered to all senior managers, all physicians, and a 10% random sample of all other hospital personnel in 69 private sector hospitals and 30 Veterans Health Administration hospitals. Both samples were randomly divided into a derivation sample to identify a short-form subset and a confirmation sample to assess the psychometric properties of the proposed short form. The short form consists of 15 items represented 3 overarching domains in the long-form scale-organization, work unit, and interpersonal. The proposed short form efficiently captures 3 important sources of variance in safety climate: organizational, work-unit, and interpersonal. The short-form development process was a practical method that can be applied to other safety climate surveys. This safety climate short form may increase response rates in studies that involve busy clinicians or repeated measures. Published 2017. This article is a U.S. Government work and is in the public domain in the USA.

  5. Forms of adhesion to Islam in Argentina: conversion, tradition, choice, return to religion and intra-Islamic transit

    Directory of Open Access Journals (Sweden)

    Silvia Maria Montenegro

    2015-06-01

    Full Text Available As in other Latin American countries, Muslim presence in Argentina traces its origin to Arab migration waves in the late nineteenth and early twentieth century; most of these immigrants came from Lebanon and Syria. We can identify three historical periods; each of these stages involves different degrees of institutionalization, diversification, visibility and negotiation of recognition in the national arena. Currently, Islam is one of the religious options available in a plural religious field and, increasingly, the communities are composed of Muslim Arab descendants and converts. This paper analyze the adhesion to Islam as a dynamic process that includes conversion, tradition, return to religion and intra-Islamic transit among Muslim descendants.  Using an ethnographic approach I will examine individual trajectories of converts and Muslim descendants, on the basis of these analyses I will try to establish a critical dialogue with the literature on conversion to Islam. This article also problematizes the converts/Muslim descendants’ dichotomy in order to arrive at a more comprehensive understanding of the dynamic of adhesion to Islam.

  6. Development of a short-form Learning Organization Survey: the LOS-27.

    Science.gov (United States)

    Singer, Sara J; Moore, Scott C; Meterko, Mark; Williams, Sandra

    2012-08-01

    Despite urgent need for innovation, adaptation, and change in health care, few tools enable researchers or practitioners to assess the extent to which health care facilities perform as learning organizations or the effects of initiatives that require learning. This study's objective was to develop and test a short-form Learning Organization Survey to fill this gap. The authors applied exploratory factor analysis and confirmatory factor analysis to data from Veterans Health Administration personnel to derive a short-form survey and then conducted further confirmatory factor analysis and factor invariance testing on additional Veterans Health Administration data to evaluate the short form. Results suggest that a 27-item, 7-factor survey (2 environmental factors, 1 on leadership, and 4 on concrete learning processes and practices) reliably measures key features of organizational learning, allowing researchers to evaluate theoretical propositions about organizational learning, its antecedents, and outcomes and enabling managers to assess and enhance organizations' learning capabilities and performance.

  7. Return migration.

    Science.gov (United States)

    Gmelch, G

    1980-01-01

    The author reviews the findings of the growing literature on return migration. Topics covered include typologies of return migrants, reasons for return, adaptation and readjustment of returnees, and the impact of return migration on the migrants' home societies. The focus of the study is on international return migration, migration to Northern Europe and northeastern North America, and return migration to the southern and eastern fringes of Europe and the Caribbean

  8. Revealing an invisible giant: A comprehensive survey into return practices within original (closed-loop) supply chains

    NARCIS (Netherlands)

    Krikke, H.; Hofenk, D.J.B.; Wang, Y.

    2013-01-01

    Forward supply chain actors are increasingly involved in the full life cycle of their products and the packaging used. Where in the past these were disposed of via (public) waste management systems or sold in cascade markets, now returns management becomes key to focal companies. Moreover, recent li

  9. A Survey for New Members of the Taurus Star-forming Region with the Sloan Digital Sky Survey

    Science.gov (United States)

    Luhman, K. L.; Mamajek, E. E.; Shukla, S. J.; Loutrel, N. P.

    2017-01-01

    Previous studies have found that ∼1 deg2 fields surrounding the stellar aggregates in the Taurus star-forming region exhibit a surplus of solar-mass stars relative to denser clusters like IC 348 and the Orion Nebula Cluster. To test whether this difference reflects mass segregation in Taurus or a variation in the initial mass function, we have performed a survey for members of Taurus across a large field (∼40 deg2) that was imaged by the Sloan Digital Sky Survey (SDSS). We obtained optical and near-infrared spectra of candidate members identified with those images and the Two Micron All Sky Survey, as well as miscellaneous candidates that were selected with several other diagnostics of membership. We have classified 22 of the candidates as new members of Taurus, which includes one of the coolest known members (M9.75). Our updated census of members within the SDSS field shows a surplus of solar-mass stars relative to clusters, although it is less pronounced than in the smaller fields toward the stellar aggregates that were surveyed for previously measured mass functions in Taurus. In addition to spectra of our new members, we include in our study near-IR spectra of roughly half of the known members of Taurus, which are used to refine their spectral types and extinctions. We also present an updated set of near-IR standard spectra for classifying young stars and brown dwarfs at M and L types. Based on observations performed with the Sloan Digital Sky Survey, Hobby-Eberly Telescope, NASA Infrared Telescope Facility, Gemini Observatory, and Canada–France–Hawaii Telescope.

  10. Impact of Next Generation Sequencing on the Organization and Funding of Returning Research Results: Survey of Canadian Research Ethics Boards Members.

    Directory of Open Access Journals (Sweden)

    Iris Jaitovich Groisman

    Full Text Available Research Ethics Boards (REBs are expected to evaluate protocols planning the use of Next Generation Sequencing technologies (NGS, assuring that any genomic finding will be properly managed. As Canadian REBs play a central role in the disclosure of such results, we deemed it important to examine the views and experience of REB members on the return of aggregated research results, individual research results (IRRs and incidental findings (IFs in current genomic research. With this intent, we carried out a web-based survey, which showed that 59.7% of respondents viewed the change from traditional sequencing to NGS as more than a technical substitution, and that 77% of respondents agreed on the importance of returning aggregated research results, the most compelling reasons being the recognition of participants' contribution and increasing the awareness of scientific progress. As for IRRs specifically, 50% of respondents were in favour of conveying such information, even when they only indicated the probability that a condition may develop. Current regulations and risk to participants were considered equally important, and much more than financial costs, when considering the return of IRRs and IFs. Respondents indicated that the financial aspect of offering genetic counseling was the least important matter when assessing it as a requisite. Granting agencies were named as mainly responsible for funding, while the organizing and returning of IRRs and IFs belonged to researchers. However, views in these matters differ according to respondents' experience. Our results draw attention to the need for improved guidance when considering the organizational and financial aspects of returning genetic research results, so as to better fulfill the ethical and moral principles that are to guide such undertakings.

  11. A Survey for New Members of the Taurus Star-Forming Region with the Sloan Digital Sky Survey

    CERN Document Server

    Luhman, K L; Shukla, S J; Loutrel, N P

    2016-01-01

    Previous studies have found that ~1 deg2 fields surrounding the stellar aggregates in the Taurus star-forming region exhibit a surplus of solar-mass stars relative to denser clusters like IC~348 and the Orion Nebula Cluster. To test whether this difference reflects mass segregation in Taurus or a variation in the IMF, we have performed a survey for members of Taurus across a large field (~40 deg2) that was imaged by the Sloan Digital Sky Survey (SDSS). We obtained optical and near-infrared spectra of candidate members identified with those images and the Two Micron All Sky Survey, as well as miscellaneous candidates that were selected with several other diagnostics of membership. We have classified 22 of the candidates as new members of Taurus, which includes one of the coolest known members (M9.75). Our updated census of members within the SDSS field shows a surplus of solar-mass stars relative to clusters, although it is less pronounced than in the smaller fields towards the stellar aggregates that were sur...

  12. Chemical Evolution in High-Mass Star-Forming Regions: Results from the MALT90 Survey

    CERN Document Server

    Hoq, Sadia; Foster, Jonathan B; Sanhueza, Patricio; Guzman, Andres; Whitaker, J Scott; Claysmith, Christopher; Rathborne, Jill M; Vasyunina, Tatiana; Vasyunin, Anton

    2013-01-01

    The chemical changes of high-mass star-forming regions provide a potential method for classifying their evolutionary stages and, ultimately, ages. In this study, we search for correlations between molecular abundances and the evolutionary stages of dense molecular clumps associated with high-mass star formation. We use the molecular line maps from Year 1 of the Millimetre Astronomy Legacy Team 90 GHz (MALT90) Survey. The survey mapped several hundred individual star-forming clumps chosen from the ATLASGAL survey to span the complete range of evolution, from prestellar to protostellar to H II regions. The evolutionary stage of each clump is classified using the Spitzer GLIMPSE/MIPSGAL mid-IR surveys. Where possible, we determine the dust temperatures and H2 column densities for each clump from Herschel Hi-GAL continuum data. From MALT90 data, we measure the integrated intensities of the N2H+, HCO+, HCN and HNC (1-0) lines, and derive the column densities and abundances of N2H+ and HCO+. The Herschel dust tempe...

  13. Near-Infrared Circular Polarization Survey in Star-Forming Regions: Correlations and Trends

    CERN Document Server

    Kwon, Jungmi; Hough, James H; Kusakabe, Nobuhiko; Nagata, Tetsuya; Nakajima, Yasushi; Lucas, Phil W; Nagayama, Takahiro; Kandori, Ryo

    2014-01-01

    We have conducted a systematic near-infrared circular polarization (CP) survey in star-forming regions, covering high-mass, intermediate-mass, and low-mass young stellar objects. All the observations were made using the SIRPOL imaging polarimeter on the Infrared Survey Facility 1.4 m telescope at the South African Astronomical Observatory. We present the polarization properties of ten sub-regions in six star-forming regions. The polarization patterns, extents, and maximum degrees of linear and circular polarizations are used to determine the prevalence and origin of CP in the star-forming regions. Our results show that the CP pattern is quadrupolar in general, the CP regions are extensive, up to 0.65 pc, the CP degrees are high, up to 20 %, and the CP degrees decrease systematically from high- to low-mass young stellar objects. The results are consistent with dichroic extinction mechanisms generating the high degrees of CP in star forming regions.

  14. Wide-Field Infrared Survey Explorer Observations of the Evolution of Massive Star-Forming Regions

    Science.gov (United States)

    Koenig, X. P.; Leisawitz, D. T.; Benford, D. J.; Rebull, L. M.; Padgett, D. L.; Asslef, R. J.

    2012-01-01

    We present the results of a mid-infrared survey of II outer Galaxy massive star-forming regions and 3 open clusters with data from the Wide-field Infrared Survey Explorer (WISE). Using a newly developed photometric scheme to identify young stellar objects and exclude extragalactic contamination, we have studied the distribution of young stars within each region. These data tend to support the hypothesis that latter generations may be triggered by the interaction of winds and radiation from the first burst of massive star formation with the molecular cloud material leftover from that earlier generation of stars. We dub this process the "fireworks hypothesis" since star formation by this mechanism would proceed rapidly and resemble a burst of fireworks. We have also analyzed small cutout WISE images of the structures around the edges of these massive star-forming regions. We observe large (1-3 pc size) pillar and trunk-like structures of diffuse emission nebulosity tracing excited polycyclic aromatic hydrocarbon molecules and small dust grains at the perimeter of the massive star-forming regions. These structures contain small clusters of emerging Class I and Class II sources, but some are forming only a single to a few new stars.

  15. Chemical Evolution in High-mass Star-forming Regions: Results from the MALT90 Survey

    Science.gov (United States)

    Hoq, Sadia; Jackson, James M.; Foster, Jonathan B.; Sanhueza, Patricio; Guzmán, Andrés; Whitaker, J. Scott; Claysmith, Christopher; Rathborne, Jill M.; Vasyunina, Tatiana; Vasyunin, Anton

    2013-11-01

    The chemical changes of high-mass star-forming regions provide a potential method for classifying their evolutionary stages and, ultimately, ages. In this study, we search for correlations between molecular abundances and the evolutionary stages of dense molecular clumps associated with high-mass star formation. We use the molecular line maps from Year 1 of the Millimetre Astronomy Legacy Team 90 GHz (MALT90) Survey. The survey mapped several hundred individual star-forming clumps chosen from the ATLASGAL survey to span the complete range of evolution, from prestellar to protostellar to H II regions. The evolutionary stage of each clump is classified using the Spitzer GLIMPSE/MIPSGAL mid-IR surveys. Where possible, we determine the dust temperatures and H2 column densities for each clump from Herschel/Hi-GAL continuum data. From MALT90 data, we measure the integrated intensities of the N2H+, HCO+, HCN and HNC (1-0) lines, and derive the column densities and abundances of N2H+ and HCO+. The Herschel dust temperatures increase as a function of the IR-based Spitzer evolutionary classification scheme, with the youngest clumps being the coldest, which gives confidence that this classification method provides a reliable way to assign evolutionary stages to clumps. Both N2H+ and HCO+ abundances increase as a function of evolutionary stage, whereas the N2H+ (1-0) to HCO+ (1-0) integrated intensity ratios show no discernable trend. The HCN (1-0) to HNC(1-0) integrated intensity ratios show marginal evidence of an increase as the clumps evolve.

  16. The Gaia-ESO Survey: metallicity of the Chamaeleon I star forming region

    CERN Document Server

    Spina, L; Palla, F; Biazzo, K; Sacco, G G; Alfaro, E J; Franciosini, E; Magrini, L; Morbidelli, L; Frasca, A; Adibekyan, V; Delgado-Mena, E; Sousa, S G; Hernandez, J I Gonzalez; Montes, D; Tabernero, H; Tautvaisiene, G; Bonito, R; Lanzafame, A C; Gilmore, G; Jeffries, R D; Vallenari, A; Bensby, T; Bragaglia, A; Flaccomio, E; Korn, A J; Pancino, E; Recio-Blanco, A; Smiljanic, R; Bergemann, M; Costado, M T; Damiani, F; Hill, V; Hourihane, A; Jofre, P; de Laverny, P; Lardo, C; Masseron, T; Prisinzano, L; Worley, C C

    2014-01-01

    Context. Recent metallicity determinations in young open clusters and star-forming regions suggest that the latter may be characterized by a slightly lower metallicity than the Sun and older clusters in the solar vicinity. However, these results are based on small statistics and inhomogeneous analyses. The Gaia-ESO Survey is observing and homogeneously analyzing large samples of stars in several young clusters and star-forming regions, hence allowing us to further investigate this issue. Aims. We present a new metallicity determination of the Chamaeleon I star-forming region, based on the products distributed in the first internal release of the Gaia-ESO Survey. Methods. 48 candidate members of Chamaeleon I have been observed with the high-resolution spectrograph UVES. We use the surface gravity, lithium line equivalent width and position in the Hertzsprung-Russell diagram to confirm the cluster members and we use the iron abundance to derive the mean metallicity of the region. Results. Out of the 48 targets,...

  17. The WiggleZ Dark Energy Survey: High Resolution Kinematics of Luminous Star-Forming Galaxies

    CERN Document Server

    Wisnioski, Emily; Blake, Chris; Wyder, Ted; Martin, Chris; Poole, Gregory B; Sharp, Rob; Couch, Warrick; Kacprzak, Glenn G; Brough, Sarah; Colless, Matthew; Contreras, Carlos; Croom, Scott; Croton, Darren; Davis, Tamara; Drinkwater, Michael J; Forster, Karl; Gilbank, David G; Gladders, Michael; Jelliffe, Ben; Jurek, Russell J; Li, I-hui; Madore, Barry; Pimbblet, Kevin; Pracy, Michael; Woods, David; Yee, H K C

    2011-01-01

    We report evidence of ordered orbital motion in luminous star-forming galaxies at z~1.3. We present integral field spectroscopy (IFS) observations, performed with the OH Suppressing InfraRed Imaging Spectrograph (OSIRIS) system, assisted by laser guide star adaptive optics on the Keck telescope, of 13 star-forming galaxies selected from the WiggleZ Dark Energy Survey. Selected via ultraviolet and [OII] emission, the large volume of the WiggleZ survey allows the selection of sources which have comparable intrinsic luminosity and stellar mass to IFS samples at z>2. Multiple 1-2 kpc size sub-components of emission, or 'clumps', are detected within the Halpha spatial emission which extends over 6-10 kpc in 4 galaxies, resolved compact emission (r100 km/s) in the most compact sources. This unique data set reveals that the most luminous star-forming galaxies at z>1 are gaseous unstable disks indicating that a different mode of star formation could be feeding gas to galaxies at z>1, and lending support to theories o...

  18. The MOSDEF Survey: Excitation Properties of $z\\sim 2.3$ Star-forming Galaxies

    CERN Document Server

    Shapley, Alice E; Kriek, Mariska; Freeman, William R; Sanders, Ryan L; Siana, Brian; Coil, Alison L; Mobasher, Bahram; Shivaei, Irene; Price, Sedona H; de Groot, Laura

    2014-01-01

    We present results on the excitation properties of z~2.3 galaxies using early observations from the MOSFIRE Deep Evolution Field (MOSDEF) Survey. With its coverage of the full suite of strongrest-frame optical emission lines, MOSDEF provides an unprecedented view of the rest-frame optical spectra of a representative sample of distant star-forming galaxies. We investigate the locations of z~2.3 MOSDEF galaxies in multiple emission-line diagnostic diagrams. These include the [OIII]/Hb vs. [NII]/Ha (O3N2) and [OIII]/Hb vs. [SII]/Ha (O3S2) "BPT" diagrams, as well as the O_32 vs. R_23 (O32R23) excitation diagram. We recover the well-known offset in the star-forming sequence of high-redshift galaxies in the O3N2 BPT diagram relative to Sloan Digital Sky Survey star-forming galaxies. However, the shift for our rest-frame optically selected sample is less significant than for rest-frame-UV selected and emission-line selected galaxies at z~2. Furthermore, we find that the offset is mass-dependent, only appearing withi...

  19. A survey of 1700 women who formed their families using donor spermatozoa.

    Science.gov (United States)

    Sawyer, Neroli; Blyth, Eric; Kramer, Wendy; Frith, Lucy

    2013-10-01

    This paper reports the results of an online survey of 1700 recipients of donor spermatozoa conducted by the Donor Sibling Registry, aiming to understand the perspectives of respondents who had used donor spermatozoa. The survey examined: choice of sperm bank and donor; reporting of births and genetic disorders; disclosure; contact with donor and half-siblings; regulation of sperm donor activity and genetic testing; and access to medical information. The respondents formed three groups: single women; women in a same-sex relationship; and women in a heterosexual relationship. Some differences between the three cohorts were observed: preinsemination counselling; acceptance of donors without medical records or with chronic or late-onset diseases; awareness of choice of bank and type of donor; and views on the right of offspring to know their genetic origins. However, important areas of common ground were identified: the wish by those who had used an anonymous donor that they had used an open-identity donor; support for, and willingness to pay for, comprehensive genetic testing of donors; and desire for access to their donor's family health information. The implications of these results for policies concerning the use and management of donor spermatozoa will be discussed. This paper reports the results of a survey of 1700 women who used donor spermatozoa to conceive a child. The survey considers their views on the following areas: choice of sperm bank and donor; reporting of births and genetic disorders; disclosure; contact with donor and half-siblings; regulation of sperm donor activity and genetic testing; and access to medical information. This was an online survey was designed and conducted by the Donor Sibling Registry (DSR), a US-based non-profit organization that supports donor sperm recipients, donors and donor-conceived people. The survey aimed to understand the experiences, perspectives and concerns of women who had used donor spermatozoa. The respondents

  20. Preliminary normative data for the Evaluation of Risks Scale-Bubble Sheet Version (EVAR-B) for large-scale surveys of returning combat veterans.

    Science.gov (United States)

    Killgore, William D S; Castro, Carl A; Hoge, Charles W

    2010-10-01

    The Evaluation of Risks (EVAR) scale has been used to assess risk-taking propensity in military samples. This report provides preliminary reliability, validity, and normative data on a modified version of the instrument designed to facilitate data entry with optical scanners, the Evaluation of Risks-Bubble Sheet version (EVAR-B). 2,015 U.S. Army soldiers completed the EVAR-B and a survey assessing risk-related behaviors 3 months after returning home from combat deployment in Iraq. EVAR-B demonstrated acceptable internal consistency and reliability and correlated significantly with independent measures of self-reported risk-taking behavior, including alcohol use and aggressive behavior, in the weeks preceding the survey. Tentative cut-offs significantly differentiated heavy drinkers, dangerous drivers, and soldiers reporting recent aggressive outbursts. Normative data are provided for comparison with future studies. The EVAR-B is a reliable and valid measure of risk-taking propensity, which provides enhanced flexibility for administration and scoring in large surveys and field environments.

  1. The SONYC survey: Towards a complete census of brown dwarfs in star forming regions

    CERN Document Server

    Muzic, K; Geers, V C; Jayawardhana, R; Tamura, M; Dawson, P; Ray, T P

    2013-01-01

    SONYC, short for "Substellar Objects in Nearby Young Clusters", is a survey program to provide a census of the substellar population in nearby star forming regions. We have conducted deep optical and near-infrared photometry in five young regions (NGC1333, rho Ophiuchi, Chamaeleon-I, Upper Sco, and Lupus-3), combined with proper motions, and followed by extensive spectroscopic campaigns with Subaru and VLT, in which we have obtained more than 700 spectra of candidate low-mass objects. We have identified and characterized more than 60 new substellar objects, among them a handful of objects with masses close to, or below the Deuterium burning limit. Through SONYC and surveys by other groups, the substellar IMF is now well characterized down to ~ 5 - 10 MJup, and we find that the ratio of the number of stars with respect to brown dwarfs lies between 2 and 6. A comprehensive survey of NGC 1333 reveals that, down to ~5MJup, free-floating objects with planetary masses are 20-50 times less numerous than stars, i.e. ...

  2. The EGNoG Survey: Molecular Gas in Intermediate-Redshift Star-Forming Galaxies

    CERN Document Server

    Bauermeister, Amber; Bolatto, Alberto D; Bureau, Martin; Leroy, Adam; Ostriker, Eve; Teuben, Peter J; Wong, Tony; Wright, Melvyn C H

    2013-01-01

    We present the Evolution of molecular Gas in Normal Galaxies (EGNoG) survey, an observational study of molecular gas in 31 star-forming galaxies from z=0.05 to z=0.5, with stellar masses of (4-30)x10^10 M_Sun and star formation rates of 4-100 M_Sun yr^-1. This survey probes a relatively un-observed redshift range in which the molecular gas content of galaxies is expected to have evolved significantly. To trace the molecular gas in the EGNoG galaxies, we observe the CO(1-0) and CO(3-2) rotational lines using the Combined Array for Research in Millimeter-wave Astronomy (CARMA). We detect 24 of 31 galaxies and present resolved maps of 10 galaxies in the lower redshift portion of the survey. We use a bimodal prescription for the CO to molecular gas conversion factor, based on specific star formation rate, and compare the EGNoG galaxies to a large sample of galaxies assembled from the literature. We find an average molecular gas depletion time of 0.76 \\pm 0.54 Gyr for normal galaxies and 0.06 \\pm 0.04 Gyr for star...

  3. Candidate Gravitationally Lensed Dusty Star-forming Galaxies in the Herschel Wide Area Surveys

    CERN Document Server

    Nayyeri, H; Cooray, A; Riechers, D A; Ivison, R J; Harris, A I; Frayer, D T; Baker, A J; Chapman, S C; Eales, S; Farrah, D; Fu, H; Marchetti, L; Marques-Chaves, R; Martinez-Navajas, P I; Oliver, S; Omont, A; Perez-Fournon, I; Scott, D; Vaccari, M; Vieira, J; Viero, M; Wardlow, J

    2016-01-01

    We present a list of candidate gravitationally lensed dusty star-forming galaxies (DSFGs) from the HerMES Large Mode Survey (HeLMS) and the Herschel Stripe 82 Survey (HerS). Together, these partially overlapping surveys cover 372 deg^2 on the sky. After removing local spiral galaxies and known radio-loud blazars, our candidate list of lensed DSFGs is composed of 77 sources with 500 micron flux densities (S_500) greater than 100 mJy. Such sources are likely dusty starburst galaxies that are selected as bright sub-millimeter galaxies (SMGs). We expect a large fraction of this list to be strongly lensed, with a small fraction made up of bright SMG-SMG mergers that appear as hyper-luminous infrared galaxies (HyLIRGs). Thirteen of the 77 candidates have spectroscopic redshifts from CO spectroscopy with ground-based interferometers, putting them at z>1 and well above the redshift of the foreground lensing galaxies. The surface density of our sample of 0.21 +/- 0.03 deg^-2. We also find nine radio-bright blazars tha...

  4. From "models" to "reality", and Return. Some Reflections on the Interaction Between Survey and Interpretative Methods for Built Heritage Conservation

    Science.gov (United States)

    Ottoni, F.; Freddi, F.; Zerbi, A.

    2017-05-01

    It's well known that more and more accurate methodologies and automatic tools are now available in the field of geometric survey and image processing and they constitute a fundamental instrument for cultural heritage knowledge and preservation; on the other side, very smart and precise numerical models are continuously improved and used in order to simulate the mechanical behaviour of masonry structures: both instruments and technologies are important part of a global process of knowledge which is at the base of any conservation project of cultural heritage. Despite the high accuracy and automation level reached by both technologies and programs, the transfer of data between them is not an easy task and defining the most reliable way to translate and exchange information without data loosing is still an open issue. The goal of the present paper is to analyse the complex process of translation from the very precise (and sometimes redundant) information obtainable by the modern survey methodologies for historic buildings (as laser scanner), into the very simplified (may be too much) schemes used to understand their real structural behaviour, with the final aim to contribute to the discussion on reliable methods for cultural heritage knowledge improvement, through empiricism.

  5. Actively Star Forming Elliptical Galaxies at Low Redshifts in the Sloan Digital Sky Survey

    CERN Document Server

    Fukugita, M; Turner, E L; Helmboldt, J; Nichol, R C; Fukugita, Masataka; Nakamura, Osamu; Turner, Edwin L.; Helmboldt, Joe

    2004-01-01

    We report discovery of actively star forming elliptical galaxies in a morphologically classified sample of bright galaxies at a low redshift obtained from the Sloan Digital Sky Survey. The emission lines of these galaxies do not show the characteristics of active galactic nuclei, and thus their strong H$\\alpha$ emission is ascribed to star formation with a rate nearly as high as that is seen in typical late spiral galaxies. This is taken as evidence against the traditional view that all elliptical galaxies formed early and now evolve only passively. The frequency of such star forming elliptical galaxies is a few tenths of a percent in the sample, but increases to 3% if we include active S0 galaxies. We may identify these galaxies as probable progenitors of so-called E+A galaxies that show the strong Balmer absorption feature of A stars superimposed on an old star population. The approximate match of the abundance of active elliptical plus S0 galaxies with that of E+A galaxies indicates that the duration of su...

  6. A very young star forming region detected by the ISOPHOT Serendipity Survey

    CERN Document Server

    Krause, O; Tóth, L V; Klaas, U; Haas, M; Stickel, M; Vavrek, R

    2003-01-01

    We present a multi-wavelength study of the star forming region ISOSS J 20298+3559, which was identified by a cross-correlation of cold compact sources from the 170 micron ISOPHOT Serendipity Survey (ISOSS) database coinciding with objects detected by the MSX, 2MASS and IRAS infrared surveys. ISOSS J 20298+3559 is associated with a massive dark cloud complex (M ~ 760 M$_{\\odot}$) and located in the Cygnus X giant molecular cloud. We derive a distance of 1800 pc on the basis of optical extinction data. The low average dust temperature (T ~ 16 K) and large mass (M ~ 120 M$_{\\odot}$) of the dense inner part of the cloud, which has not been dispersed, indicates a recent begin of star formation. The youth of the region is supported by the early evolutionary stage of several pre- and protostellar objects discovered across the regio n: I) Two candidate Class 0 objects with masses of 8 and 3.5 M$_{\\odot}$, II) a gravitationally bound, cold (T ~ 12 K) and dense (n(H$_{2}$) \\~ 2 x 10$^{5}$ cm$^{-3}$) cloud core with a m...

  7. Multi-wavelength study of 14000 star-forming galaxies from the Sloan Digital Sky Survey

    CERN Document Server

    Izotov, Y I; Fricke, K J; Henkel, C

    2013-01-01

    (abridged) We studied a large sample of ~14000 dwarf star-forming galaxies with strong emission lines selected from the Sloan Digital Sky Survey (SDSS) and distributed in the redshift range of z~0-0.6. We modelled spectral energy distributions (SED) of all galaxies which were based on the SDSS spectra in the visible range of 0.38-0.92 micron and included both the stellar and ionised gas emission. These SEDs were extrapolated to the UV and mid-infrared ranges to cover the wavelength range of 0.1-22 micron. The SDSS spectroscopic data were supplemented by photometric data from the GALEX, SDSS, 2MASS, WISE, IRAS, and NVSS all-sky surveys. We derived global characteristics of the galaxies, such as their element abundances, luminosities, and stellar masses. The luminosities and stellar masses range within the sample over ~5 orders of magnitude, thereby linking low-mass and low-luminosity blue compact dwarf (BCD) galaxies to luminous galaxies, which are similar to high-redshift Lyman-break galaxies (LBGs). The lumi...

  8. Reliability of a patient survey assessing "Short Form Injury Questionnaire 7" in Iran

    Institute of Scientific and Technical Information of China (English)

    Mahdi Sharif-Alhoseini; Soheil Saadat; Afarin Rahimi-Movaghar; Abbas Motevalian; Masoumeh Amin-Esmaeili; Mitra Hefazi; Vafa Rahimi-Movaghar

    2012-01-01

    Objective: Injury is a major cause of morbidity and mortality in the world.The assessment of patterns and severity of injury in high-risk groups is crucial for planning and service development.On a large scale national household survey,we estimated the annual incidence and the patterns of injury,the demographics of the injured people,as well as the service use for all injuries in Iran.The current study aims at assessing the reliability of the questionnaire before carrying out a national survey.Methods: In a pilot study using cluster random sampling approach,73 people were interviewed.The interviewers asked the participants to report all injuries occurred in them and the care provided during the previous 12 months,based on "Short Form Injury Questionnaire 7".About two weeks later,the interview was repeated by another interviewer.Results: In our test-retest reliability,Kappa score was good for three and moderate for four questions.The question on the injured organ had the highest test-retest reliability with a Kappa score of 0.84.Conclusions:The reliability of the questionnaire and the procedure of questioning are confirmed.The questionnire is proper for utilization in large national surveies.

  9. Research Misconduct in the Croatian Scientific Community: A Survey Assessing the Forms and Characteristics of Research Misconduct.

    Science.gov (United States)

    Pupovac, Vanja; Prijić-Samaržija, Snježana; Petrovečki, Mladen

    2017-02-01

    The prevalence and characteristics of research misconduct have mainly been studied in highly developed countries. In moderately or poorly developed countries such as Croatia, data on research misconduct are scarce. The primary aim of this study was to determine the rates at which scientists report committing or observing the most serious forms of research misconduct, such as falsification , fabrication, plagiarism, and violation of authorship rules in the Croatian scientific community. Additionally, we sought to determine the degree of development and the extent of implementation of the system for defining and regulating research misconduct in a typical scientific community in Croatia. An anonymous questionnaire was distributed among 1232 Croatian scientists at the University of Rijeka in 2012/2013 and 237 (19.2 %) returned the survey. Based on the respondents who admitted having committed research misconduct, 9 (3.8 %) admitted to plagiarism, 22 (9.3 %) to data falsification, 9 (3.8 %) to data fabrication, and 60 (25.3 %) respondents admitted to violation of authorship rules. Based on the respondents who admitted having observed research misconduct of fellow scientists, 72 (30.4 %) observed plagiarism, 69 (29.1 %) observed data falsification, 46 (19.4 %) observed data fabrication, and 132 (55.7 %) respondents admitted having observed violation of authorship rules. The results of our study indicate that the efficacy of the system for managing research misconduct in Croatia is poor. At the University of Rijeka there is no document dedicated exclusively to research integrity, describing the values that should be fostered by a scientist and clarifying the forms of research misconduct and what constitutes a questionable research practice. Scientists do not trust ethical bodies and the system for defining and regulating research misconduct; therefore the observed cases of research misconduct are rarely reported. Finally, Croatian scientists are not formally

  10. Characterizing and Cataloguing Star-Forming Galaxies in Preparation for the LADUMA Survey

    Science.gov (United States)

    Perez, Manuel Joe; Baker, Andrew J.; Wu, John F.

    2017-01-01

    This poster presents the results of an effort to process, characterize, and catalog the optical spectra of ~ 1,500 star-forming galaxies, located in the Extended Chandra Deep Field South (ECDFS), which will be used in stacking experiments by the Looking At the Distant Universe with the MeerKAT Array (LADUMA) deep HI survey. The LADUMA HI data will be used to study the evolution of the Tully-Fisher relation, cosmic neutral gas density, and other intrinsic properties of galaxies as a function of redshift. The stacking component of this research will rely on large catalogs of star-forming galaxies in the ECDFS, categorized according to star-formation rate (SFR), metallicity, stellar color excess, and redshift. We used optical spectra obtained with the Anglo-Australian Telescope, for which we have developed an automated pipeline to calculate extinction-corrected line fluxes, SFRs, and various metallicity diagnostics. The pipeline ultimately provides a visualization of the objects and their intrinsic properties as related to redshift for future analysis by the LADUMA team. This work has been supported by NSF grant PHY-1560077.

  11. Homeward bound: Yemeni return migration.

    Science.gov (United States)

    Colton, N A

    1993-01-01

    The author discusses the return migration of Yemenis from Saudi Arabia during the period 1970-1989. "Through the use of original, empirical data collected in Yemen, this article sheds light on who these returning migrants are, where they have come from, and what sort of future awaits them.... The survey conducted on return migration was administered in the winter and spring of 1989 in a region of North Yemen called al-Hujariyya."

  12. Kekuatan Harga Dalam Membentuk Niat Berobat Ulang Di Rumah Sakit [The Power of Price in Forming an Intention to Return to a Hospital

    Directory of Open Access Journals (Sweden)

    Waluyo Budi Atmoko

    2017-06-01

    Full Text Available From the perspective of consumer research, someone will continue to consume a service depending on the result of an appraisal that causes a satisfactory emotional response. This satisfaction is the base of an cognitive evaluation which forms the intent to repeat using a service in the future. Satisfaction is the result of an appraisal of the ability of the performance to fulfill the expectation of the service consumed. Therefore, satisfaction is a function of the discrepancy between expectation and performance. Consumers often use price as a quality clue. There is a correlation between perceived service quality and perceived price fairness that they influence satisfaction and form intention to repeat consuming a service. Research was conducted using a survey with a population of patients in a private hospital. Sample size was 200 respondents determined by purposive sampling techniques. Hypotheses were examined by the structural equation modelling method. The result of the research shows the following: there was a significant correlation between perceived service quality and perceived price fairness, perceived service quality was a significant influence in consumer satisfaction, and perceived price fairness has significant influence in revisit intention.  BAHASA INDONESIA ABSTRAK:  Dalam perspektif perilaku konsumen, seseorang akan meneruskan untuk mengonsumsi sebuah jasa bergantung pada hasil penaksiran yang menimbulkan tanggapan emosional dalam bentuk kepuasan. Kepuasan ini menjadi dasar evaluasi kognitif terbentuknya niat untuk mengonsumsi ulang jasa di masa mendatang. Kepuasan merupakan hasil penaksiran bahwa kinerja mampu memenuhi harapan terhadap jasa yang dikonsumsi. Jadi kepuasan merupakan fungsi ketidak-sesuaian antara harapan dan kinerja. Konsumen seringkali menggunakan harga sebagai petunjuk kualitas. Ada korelasi antara kualitas pelayanan yang dipersepsikan dan kewajaran harga yang dipersepsikan yang berpengaruh pada kepuasan dan

  13. A Survey of Large Molecules of Biological Interest toward Selected High Mass Star Forming Regions

    Science.gov (United States)

    Remijan, A.; Shiao, Y.-S.; Friedel, D. N.; Meier, D. S.; Snyder, L. E.

    2004-01-01

    We have surveyed three high mass Galactic star forming regions for interstellar methanol (CH3OH), formic acid (HCOOH), acetic acid (CH3COOH), methyl formate (HCOOCH3), methyl cyanide (CH3CN), and ethyl cyanide (CH3CH2CN) with the BIMA Array. From our observations, we have detected two new sources of interstellar HCOOH toward the hot core regions G19.61-0.23 and W75N. We have also made the first detections of CH3CH2CN and HCOOCH3 toward G19.61-0.23. The relative HCOOH/HCOOCH3 abundance ratio toward G19.61-0.23 is 0.18 which is comparable to the abundance ratios found by Liu and colleagues toward Sgr B2(N-LMH), Orion and W51(approximately 0.10). We have made the first detection of HCOOCH3 toward W75N. The relative HCOOH/HCOOCH3 abundance ratio toward W75N is 0.26 which is more than twice as large as the abundance ratios found by Liu and colleagues. Furthermore, the hot core regions around W75N show a chemical differentiation between the O and N cores similar to what is seen toward the Orion Hot Core and Compact Ridge and W3(OH) and W3(H2O). It is also apparent from our observations that the high mass star forming region G45.47+0.05 does not contain any compact hot molecular core and as a consequence its chemistry may be similar to cold dark clouds. Finally, the formation of CH3COOH appears to favor HMCs with well mixed N and O, despite the fact that CH3COOH does not contain a N atom. If proved to be true, this is an important constraint on CH3COOH formation and possibly other structurally similar biomolecules.

  14. The Herschel Virgo Cluster Survey. XVIII. Star-forming dwarfs in a cluster environment

    CERN Document Server

    Grossi, M; Madden, S C; Hughes, T M; Auld, R; Baes, M; Bendo, G J; Bianchi, S; Bizzocchi, L; Boquien, M; Boselli, A; Clemens, M; Corbelli, E; Cortese, L; Davies, J; De Looze, I; Alighieri, S di Serego; Fritz, J; Pappalardo, C; Pierini, D; Rémy-Ruyer, A; Smith, M W L; Verstappen, J; Viaene, S; Vlahakis, C

    2014-01-01

    To assess the effects of the cluster environment on the different components of the interstellar medium, we analyse the FIR-submm properties of a sample of star-forming dwarf (SFD) galaxies detected by the Herschel Virgo Cluster Survey (HeViCS). We determine dust masses and dust temperatures by fitting a modified black body (MBB) function to the spectral energy distributions (SEDs). Stellar and gas masses, star formation rates (SFRs), and metallicities are obtained from the analysis of a set of ancillary data. Dust is detected in 49 out of 140 optically identified dwarfs covered by the HeViCS field; considering only dwarfs brighter than $m_B$ = 18 mag, this gives a detection rate of 43%. After evaluating different emissivity indices, we find that the FIR-submm SEDs are best-fit by $\\beta$=1.5, with a median dust temperature $T_d$ = 22.4 K. Assuming $\\beta$=1.5, 67% of the 23 galaxies detected in all five Herschel bands show emission at 500 $\\mu$m in excess of the MBB model. The excess is inversely correlated ...

  15. The redshift distribution of dusty star forming galaxies from the SPT survey

    CERN Document Server

    Strandet, M L; Vieira, J D; de Breuck, C; Aguirre, J E; Aravena, M; Ashby, M L N; Béthermin, M; Bradford, C M; Carlstrom, J E; Chapman, S C; Crawford, T M; Everett, W; Fassnacht, C D; Furstenau, R M; Gonzalez, A H; Greve, T R; Gullberg, B; Hezaveh, Y; Kamenetzky, J R; Litke, K; Ma, J; Malkan, M; Marrone, D P; Menten, K M; Murphy, E J; Nadolski, A; Rotermund, K M; Spilker, J S; Stark, A A; Welikala, N

    2016-01-01

    We use the Atacama Large Millimeter/submillimeter Array (ALMA) in Cycle 1 to determine spectroscopic redshifts of high-redshift dusty star-forming galaxies (DSFGs) selected by their 1.4mm continuum emission in the South Pole Telescope (SPT) survey. We present ALMA 3mm spectral scans between 84-114GHz for 15 galaxies and targeted ALMA 1mm observations for an additional eight sources. Our observations yield 30 new line detections from CO, [CI] , [NII] , H_2O and NH_3. We further present APEX [CII] and CO mid-J observations for seven sources for which only a single line was detected in spectral-scan data from ALMA Cycle 0 or Cycle 1. We combine the new observations with previously published and new mm/submm line and photometric data of the SPT-selected DSFGs to study their redshift distribution. The combined data yield 39 spectroscopic redshifts from molecular lines, a success rate of >85%. Our sample represents the largest data set of its kind today and has the highest spectroscopic completeness among all redsh...

  16. VLBA Survey of OH Masers in Star-Forming Regions II: Satellite Lines

    CERN Document Server

    Ruiz-Velasco, A E; Migenes, V; Wiggins, B K

    2016-01-01

    Using the Very Long Baseline Array (VLBA) we performed a high resolution OH maser survey in Galactic star-forming regions (SFRs). We observed all the ground state spectral lines: the main lines at 1665 and 1667 MHz and the satellite lines at 1612 and 1720 MHz. Due to the exceptionality of finding satellite lines in SFRs, we will focus our discussion on those lines. In our sample of 41 OH maser sources, five (12%) showed the 1612 MHz line and ten (24%) showed the 1720 MHz line, with only one source showing both lines. We find that 1720 MHz emission is correlated with the presence of HII regions, suggesting that this emission could be used to diagnose or trace high-mass star formation. We include an analysis of the possible mechanisms that could be causing this correlation as well as assessing the possible relationships between lines in our sample. In particular, the presence of magnetic fields seems to play an important role, as we found Zeeman splitting in four of our sources (W75 N, W3(OH), W51 and NGC 7538)...

  17. Returning home

    DEFF Research Database (Denmark)

    Agergaard, Jytte; Brøgger, Ditte

    2016-01-01

    flows. By focusing on these educational migrants, this paper explores how they connect to their rural homes. Guided by a critical reading of the migration-development scholarship, the paper examines how migrants and their relatives make sense of educational migrants’ remitting and returning practices...... and partake in important social remittance practices that represent a vision for impacting local development...

  18. Comparison of Vineland Adaptive Behavior Scales-Survey Form age equivalent and standard score with the Bayley Mental Development Index.

    Science.gov (United States)

    Raggio, D J; Massingale, T W; Bass, J D

    1994-08-01

    The Vineland Adaptive Behavior Scales-Survey Form standard score, Vineland Adaptive Behavior Scales-Survey Form age equivalent and Bayley scales' Mental Development Index were given to 44 high-risk infants age 12 mo. and suspected of developmental delay. The VABS-Survey Form, a revision of the Vineland Social Maturity Scale is frequently used in assessment of developmental delay; however, questions have arisen as to whether the standard score or age equivalent is the better measure. A developmental quotient based on VABS-SF age equivalent and VABS-SF standard score was compared with the Bayley Mental Development Index. The mean VABS-SF standard score was significantly higher than the age equivalent quotient and the Bayley Mental Development Index. Implications for the use of VABS-SF age equivalent in evaluating such infants are discussed.

  19. The construct validity of the Short Form-36 Health Survey for patients with nonspecific chronic neck pain

    NARCIS (Netherlands)

    Knol -de Vries, Grietje E.; Jorritsma, Wim; Dijkstra, Pieter U.; Geertzen, Jan H. B.; Reneman, Michiel F.

    2015-01-01

    Self-reported disability related to neck pain can be measured using general health questionnaires. The validity of the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) in patients with nonspecific chronic neck pain (CNP) in a tertiary outpatient rehabilitation setting is unknown. This

  20. X-ray properties of radio-selected star forming galaxies in the Chandra-COSMOS survey

    OpenAIRE

    Ranalli, P.; Comastri, A.; Zamorani, G.; Cappelluti, N.; Civano, F.; Georgantopoulos, I.; Gilli, R.; Schinnerer, E.; Smolcic, V.; Vignali, C.

    2012-01-01

    X-ray surveys contain sizable numbers of star forming galaxies, beyond the AGN which usually make the majority of detections. Many methods to separate the two populations are used in the literature, based on X-ray and multiwavelength properties. We aim at a detailed test of the classification schemes and to study the X-ray properties of the resulting samples. We build on a sample of galaxies selected at 1.4 GHz in the VLA-COSMOS survey, classified by Smolcic et al. (2008) according to their o...

  1. Language Skills and Economic Returns

    OpenAIRE

    Garrouste, Christelle

    2008-01-01

    This article focuses on the contributions from the emerging positivist epistemological approach, endorsed by the economics of language and the economics of education, to study the returns to language skills, assuming that language competencies constitute key components of human capital. It presents initial results from a study on economic returns to language skills in eight countries enrolled in the International Adult Literacy Survey (IALS) – Chile, the Czech Republic, Denmark, Finland, Hung...

  2. Language Skills and Economic Returns

    OpenAIRE

    Garrouste, Christelle

    2008-01-01

    This article focuses on the contributions from the emerging positivist epistemological approach, endorsed by the economics of language and the economics of education, to study the returns to language skills, assuming that language competencies constitute key components of human capital. It presents initial results from a study on economic returns to language skills in eight countries enrolled in the International Adult Literacy Survey (IALS) – Chile, the Czech Republic, Denmark, Finland, Hung...

  3. 1985 National Wildlife Federation Raptor Information Center Bald Eagle Midwinter Survey Field Form. Blackwater NWR.

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Observers arrived at designated areas 9:50 am, started count at 10:00 am and stayed at locations until 10:30 am. No aerial survey. See location on attached map for...

  4. Surveying Medieval Archaeology: a New Form for Harris Paradigm Linking Photogrammetry and Temporal Relations

    Science.gov (United States)

    Drap, P.; Papini, O.; Pruno, E.; Nucciotti, M.; Vannini, G.

    2017-02-01

    The paper presents some reflexions concerning an interdisciplinary project between Medieval Archaeologists from the University of Florence (Italy) and ICT researchers from CNRS LSIS of Marseille (France), aiming towards a connection between 3D spatial representation and archaeological knowledge. It is well known that Laser Scanner, Photogrammetry and Computer Vision are very attractive tools for archaeologists, although the integration of representation of space and representation of archaeological time has not yet found a methodological standard of reference. We try to develop an integrated system for archaeological 3D survey and all other types of archaeological data and knowledge through integrating observable (material) and non-graphic (interpretive) data. Survey plays a central role, since it is both a metric representation of the archaeological site and, to a wider extent, an interpretation of it (being also a common basis for communication between the 2 teams). More specifically 3D survey is crucial, allowing archaeologists to connect actual spatial assets to the stratigraphic formation processes (i.e. to the archaeological time) and to translate spatial observations into historical interpretation of the site. We propose a common formalism for describing photogrammetrical survey and archaeological knowledge stemming from ontologies: Indeed, ontologies are fully used to model and store 3D data and archaeological knowledge. Xe equip this formalism with a qualitative representation of time. Stratigraphic analyses (both of excavated deposits and of upstanding structures) are closely related to E. C. Harris theory of "Stratigraphic Unit" ("US" from now on). Every US is connected to the others by geometric, topological and, eventually, temporal links, and are recorded by the 3D photogrammetric survey. However, the limitations of the Harris Matrix approach lead to use another representation formalism for stratigraphic relationships, namely Qualitative Constraints

  5. TADPOL: A 1.3 mm Survey of Dust Polarization in Star-forming Cores and Regions

    OpenAIRE

    Hull, Charles L. H.; Plambeck, Richard L.; Kwon, Woojin; Bower, Geoffrey C.; Carpenter, John M.; Crutcher, Richard M.; Fiege, Jason D.; Franzmann, Erica; Hakobian, Nicholas S.; Heiles, Carl; Houde, Martin; Hughes, A. Meredith; Lamb, James W.; Looney, Leslie W.; Marrone, Daniel P.

    2014-01-01

    We present λ 1.3 mm Combined Array for Research in Millimeter-wave Astronomy observations of dust polarization toward 30 star-forming cores and eight star-forming regions from the TADPOL survey. We show maps of all sources, and compare the ~2".5 resolution TADPOL maps with ~20" resolution polarization maps from single-dish submillimeter telescopes. Here we do not attempt to interpret the detailed B-field morphology of each object. Rather, we use average B-field orientations to derive conclusi...

  6. High-Redshift Clusters form NVSS: The TexOx Cluster (TOC) Survey

    Energy Technology Data Exchange (ETDEWEB)

    Croft, S; Rawlings, S; Hill, G J

    2003-02-11

    The TexOx Cluster (TOC) Survey uses overdensities of radiosources in the NVSS to trace clusters of galaxies. The links between radiosources and rich environments make this a powerful way to find clusters which may potentially be overlooked by other selection techniques. By including constraints from optical surveys, TOC is an extremely efficient way to find clusters at high redshift. One such field, TOC J0233.3+3021, contains at least one galaxy cluster (at z {approx} 1.4) and has been detected using the Sunyaev-Zel'dovich (SZ) effect. Even in targeted deep optical observations, however, distinguishing the cluster galaxies from the background is difficult, especially given the tendency of TOC to select fields containing multiple structures at different redshifts.

  7. Science Results from the VISTA Survey of the Orion Star-forming Region

    Science.gov (United States)

    Petr-Gotzens, M.; Alcalá, J. M.; Briceño, C.; González-Solares, E.; Spezzi, L.; Teixeira, P.; Osorio, M. R. Z.; Comerón, F.; Emerson, J.; Hodgkin, S.; Hussain, G.; McCaughrean, M.; Melnick, J.; Oliveira, J.; Ramsay, S.; Stanke, T.; Winston, E.; Zinnecker, H.

    2011-09-01

    As part of the VISTA Science Verification programme, a large set of images in Orion was obtained at five near-infrared wavelength bands, from 0.9 to 2.2 μm. The resulting multi-band catalogue contains approximately three million sources, allowing investigation of various issues concerning star and brown dwarf formation, such as a) the difference in the shape of the substellar mass function in a cluster vs. non-clustered environment, b) the influence of massive OB stars on the process of brown dwarf formation, c) the size and morphology of dust envelopes around protostars, and d) the comparative role of mass and environment on the evolution of circumstellar discs. The data from the VISTA Orion Survey, including catalogues, are available to the community. In this article we present an overview of selected science results that have emerged so far from this survey.

  8. The Basic Forms That Education Returns to Humanity%试论教育回归人性的基本方式

    Institute of Scientific and Technical Information of China (English)

    涂艳国; 周贵礼

    2012-01-01

    To revive the humanity of education is basically a concept that starts with making use of the genuineness in humanity to bring out the goodness in humanity, helps human beings experience their lives to the fullest extent, and achieves the integration of genuineness, goodness and virtue. The basic approach for educational theory to return to humanity is a full scale command of the basis on which how humanity and education mean to each other and how they play their roles in real life. The revival of humanity in education involves the aspects of educational theories and educational practices. It is believed that education should be given fundamental, basic and overall theoretical and valuable guidance, so that education would have more respect for humanity, make better use of humanity and bring itself closer to humanity, and to the end, it would breed humanity to develop into a certain kind of desired status in the best possible way. The basic approach for educational activity to return to humanity is to embark on a journey that pursues the trueness, virtue and wisdom. It means that we should respect humanity, press close to the true existence of humanity the real life, improve and upgrade humanity in a perfect and benign way, so that we can completely possess the intellectual quality by the full force of education, to the extent that rational wisdom, value wisdom and practical wisdom could be blended into one, and complete our quest for experiencing lives to fullest.%教育回归人性,指教育要基于与利用人性之真,达成人性之善,促成人完满的生命体验,实现真、善、美的统一。教育理论回归人性的基本方式,是在全面把握人性与教育的相互意义及其现实表现的基础上,给予教育根本性、基础性、总体性的理论指导与价值引领,让教育更加尊重人性、更好地利用人性、更合乎人性,让人性在教育的作用下尽可能地向某种理想状态发展。教育活动

  9. Surveying DNA Elements within Functional Genes of Heterocyst-Forming Cyanobacteria.

    Directory of Open Access Journals (Sweden)

    Jason A Hilton

    Full Text Available Some cyanobacteria are capable of differentiating a variety of cell types in response to environmental factors. For instance, in low nitrogen conditions, some cyanobacteria form heterocysts, which are specialized for N2 fixation. Many heterocyst-forming cyanobacteria have DNA elements interrupting key N2 fixation genes, elements that are excised during heterocyst differentiation. While the mechanism for the excision of the element has been well-studied, many questions remain regarding the introduction of the elements into the cyanobacterial lineage and whether they have been retained ever since or have been lost and reintroduced. To examine the evolutionary relationships and possible function of DNA sequences that interrupt genes of heterocyst-forming cyanobacteria, we identified and compared 101 interruption element sequences within genes from 38 heterocyst-forming cyanobacterial genomes. The interruption element lengths ranged from about 1 kb (the minimum able to encode the recombinase responsible for element excision, up to nearly 1 Mb. The recombinase gene sequences served as genetic markers that were common across the interruption elements and were used to track element evolution. Elements were found that interrupted 22 different orthologs, only five of which had been previously observed to be interrupted by an element. Most of the newly identified interrupted orthologs encode proteins that have been shown to have heterocyst-specific activity. However, the presence of interruption elements within genes with no known role in N2 fixation, as well as in three non-heterocyst-forming cyanobacteria, indicates that the processes that trigger the excision of elements may not be limited to heterocyst development or that the elements move randomly within genomes. This comprehensive analysis provides the framework to study the history and behavior of these unique sequences, and offers new insight regarding the frequency and persistence of interruption

  10. Surveying DNA Elements within Functional Genes of Heterocyst-Forming Cyanobacteria.

    Science.gov (United States)

    Hilton, Jason A; Meeks, John C; Zehr, Jonathan P

    2016-01-01

    Some cyanobacteria are capable of differentiating a variety of cell types in response to environmental factors. For instance, in low nitrogen conditions, some cyanobacteria form heterocysts, which are specialized for N2 fixation. Many heterocyst-forming cyanobacteria have DNA elements interrupting key N2 fixation genes, elements that are excised during heterocyst differentiation. While the mechanism for the excision of the element has been well-studied, many questions remain regarding the introduction of the elements into the cyanobacterial lineage and whether they have been retained ever since or have been lost and reintroduced. To examine the evolutionary relationships and possible function of DNA sequences that interrupt genes of heterocyst-forming cyanobacteria, we identified and compared 101 interruption element sequences within genes from 38 heterocyst-forming cyanobacterial genomes. The interruption element lengths ranged from about 1 kb (the minimum able to encode the recombinase responsible for element excision), up to nearly 1 Mb. The recombinase gene sequences served as genetic markers that were common across the interruption elements and were used to track element evolution. Elements were found that interrupted 22 different orthologs, only five of which had been previously observed to be interrupted by an element. Most of the newly identified interrupted orthologs encode proteins that have been shown to have heterocyst-specific activity. However, the presence of interruption elements within genes with no known role in N2 fixation, as well as in three non-heterocyst-forming cyanobacteria, indicates that the processes that trigger the excision of elements may not be limited to heterocyst development or that the elements move randomly within genomes. This comprehensive analysis provides the framework to study the history and behavior of these unique sequences, and offers new insight regarding the frequency and persistence of interruption elements in

  11. Team Modelling: Survey of Experimental Platforms (Modelisation d’equipes : Examen de plate-formes experimentales)

    Science.gov (United States)

    2006-09-01

    analyse documentaire des ouvrages traitant de plates-formes pour la recherche sur les équipes afin d’aider l’État à choisir un type spécifique... documentaire et à indiquer les exigences auxquelles la nouvelle plate-forme expérimentale devra satisfaire afin d’autoriser des expériences qui seront...représentatives du contexte du travail d’équipe ciblé. Des liens ont également été établis avec l’analyse documentaire qui a été effectuée dans la

  12. The SAMI Galaxy Survey: Shocks and Outflows in a normal star-forming galaxy

    CERN Document Server

    Ho, I-Ting; Dopita, Michael A; Medling, Anne M; Allen, J T; Bland-Hawthorn, Joss; Bloom, Jessica V; Bryant, Julia J; Croom, Scott M; Fogarty, L M R; Goodwin, Michael; Green, Andy W; Konstantopoulos, Iraklis S; Lawrence, Jon S; Owers, Matt S; Richards, Samuel; Sharp, Rob

    2014-01-01

    We demonstrate the feasibility and potential of using large integral field spectroscopic surveys to investigate the prevalence of galactic-scale outflows in the local Universe. Using integral field data from SAMI and the Wide Field Spectrograph, we study the nature of an isolated disk galaxy, SDSS J090005.05+000446.7 (z = 0.05386). In the integral field datasets, the galaxy presents skewed line profiles changing with position in the galaxy. The skewed line profiles are caused by different kinematic components overlapping in the line-of-sight direction. We perform spectral decomposition to separate the line profiles in each spatial pixel as combinations of (1) a narrow kinematic component consistent with HII regions, (2) a broad kinematic component consistent with shock excitation, and (3) an intermediate component consistent with shock excitation and photoionisation mixing. The three kinematic components have distinctly different velocity fields, velocity dispersions, line ratios, and electron densities. We m...

  13. The Intrinsic Eddington Ratio Distribution of Active Galactic Nuclei in Star-forming Galaxies from the Sloan Digital Sky Survey

    CERN Document Server

    Jones, M L; Black, C S; Hainline, K N; DiPompeo, M A; Goulding, A D

    2016-01-01

    An important question in extragalactic astronomy concerns the distribution of black hole accretion rates of active galactic nuclei (AGN). Based on observations at X-ray wavelengths, the observed Eddington ratio distribution appears as a power law, while optical studies have often yielded a lognormal distribution. There is increasing evidence that these observed discrepancies may be due to contamination by star formation and other selection effects. Using a sample of galaxies from the Sloan Digital Sky Survey Data Release 7, we test if an intrinsic Eddington ratio distribution that takes the form of a Schechter function is consistent with previous work that suggests that young galaxies in optical surveys have an observed lognormal Eddington ratio distribution. We simulate the optical emission line properties of a population of galaxies and AGN using a broad instantaneous luminosity distribution described by a Schechter function near the Eddington limit. This simulated AGN population is then compared to observe...

  14. Conserved S-Layer-Associated Proteins Revealed by Exoproteomic Survey of S-Layer-Forming Lactobacilli.

    Science.gov (United States)

    Johnson, Brant R; Hymes, Jeffrey; Sanozky-Dawes, Rosemary; Henriksen, Emily DeCrescenzo; Barrangou, Rodolphe; Klaenhammer, Todd R

    2015-10-16

    The Lactobacillus acidophilus homology group comprises Gram-positive species that include L. acidophilus, L. helveticus, L. crispatus, L. amylovorus, L. gallinarum, L. delbrueckii subsp. bulgaricus, L. gasseri, and L. johnsonii. While these bacteria are closely related, they have varied ecological lifestyles as dairy and food fermenters, allochthonous probiotics, or autochthonous commensals of the host gastrointestinal tract. Bacterial cell surface components play a critical role in the molecular dialogue between bacteria and interaction signaling with the intestinal mucosa. Notably, the L. acidophilus complex is distinguished in two clades by the presence or absence of S-layers, which are semiporous crystalline arrays of self-assembling proteinaceous subunits found as the outermost layer of the bacterial cell wall. In this study, S-layer-associated proteins (SLAPs) in the exoproteomes of various S-layer-forming Lactobacillus species were proteomically identified, genomically compared, and transcriptionally analyzed. Four gene regions encoding six putative SLAPs were conserved in the S-layer-forming Lactobacillus species but not identified in the extracts of the closely related progenitor, L. delbrueckii subsp. bulgaricus, which does not produce an S-layer. Therefore, the presence or absence of an S-layer has a clear impact on the exoproteomic composition of Lactobacillus species. This proteomic complexity and differences in the cell surface properties between S-layer- and non-S-layer-forming lactobacilli reveal the potential for SLAPs to mediate intimate probiotic interactions and signaling with the host intestinal mucosa.

  15. Surveying effects of forward-backward P/E‎‎ ratios on stock's return and ‎fluctuation in Tehran's stock exchange

    Directory of Open Access Journals (Sweden)

    Younos VakilAlroaia

    2012-08-01

    Full Text Available The aim of this study is to study the relationship between forward-backward effects on stock return, which normally depends on Price-Earnings ratio (P/E‎ and stock fluctuation in stock exchange. Monthly time series pattern of Tehran stock exchange are used monthly from 2006 to 2010. The data contains all available companies in exchange where the shares were traded at the least 120 days during for the recent 12 months. The results of this research show that the independent variables investigated in this research have meaningful effects on the research's dependent variable. This means that the effects of company’s systematic risk and markets risk on companies’ stock return are positive.

  16. Survey of European and Major ISC Facilities for Supporting Mars and Sample Return Mission Aerothermodynamics and Tests Required for Thermal Protection System and Dynamic Stability

    Directory of Open Access Journals (Sweden)

    Mathilde Bugel

    2011-01-01

    Full Text Available In the frame of future sample return missions to Mars, asteroids, and comets, investigated by the European Space Agency, a review of the actual aerodynamics and aerothermodynamics capabilities in Europe for Mars entry of large vehicles and high-speed Earth reentry of sample return capsule has been undertaken. Additionally, capabilities in Canada and Australia for the assessment of dynamic stability, as well as major facilities for hypersonic flows available in ISC, have been included. This paper provides an overview of European current capabilities for aerothermodynamics and testing of thermal protection systems. This assessment has allowed the identification of the needs in new facilities or upgrade of existing ground tests for covering experimentally Mars entries and Earth high-speed reentries as far as aerodynamics, aerothermodynamics, and thermal protection system testing are concerned.

  17. A Mini X-Ray Survey of Sub-DLAs; Searching for AGNs Formed in Protogalaxies

    CERN Document Server

    Chartas, G; Asper, A

    2013-01-01

    A significant fraction of the sub-damped Lyman-alpha (sub-DLA) absorption systems in quasar spectra appear to be metal-rich, many with even super-solar element abundances. This raises the question whether some sub-DLAs may harbor active galactic nuclei (AGN) since supersolar metallicities are observed in AGN. Here we investigate this question based on a mini-survey of 21 quasars known to contain sub-DLAs in their spectra. The X-ray observations were performed with the Chandra X-ray Observatory. In cases of no detection we estimated upper limits of the X-ray luminosities of possible AGNs at the redshifts of the sub-DLAs. In six cases we find possible X-ray emission within ~ 1 arcsec of the background quasar consistent with the presence of a nearby X-ray source. If these nearby X-ray sources are at the redshifts of the sub-DLAs, their estimated 0.2-10 keV luminosities range between 0.8 x 10^{44}h^{-2} and 4.2 x 10^{44}h^{-2} erg s^{-1}, thus ruling out a normal late-type galaxy origin, and suggesting that the e...

  18. A distance limited sample of massive star forming cores from the RMS survey

    CERN Document Server

    Maud, L T; Moore, T J T; Mottram, J C; Urquhart, J S; Cicchini, A

    2015-01-01

    We analyse C$^{18}$O ($J=3-$2) data from a sample of 99 infrared-bright massive young stellar objects (MYSOs) and compact HII regions that were identified as potential molecular-outflow sources in the Red MSX source (RMS) survey. We extract a distance limited (D $<$ 6 kpc) sample shown to be representative of star formation covering the transition between the source types. At the spatial resolution probed, Larson-like relationships are found for these cores, though the alternative explanation, that Larson's relations arise where surface-density-limited samples are considered, is also consistent with our data. There are no significant differences found between source properties for the MYSOs and HII regions, suggesting that the core properties are established prior to the formation of massive stars, which subsequently have little impact at the later evolutionary stages investigated. There is a strong correlation between dust-continuum and C$^{18}$O-gas masses, supporting the interpretation that both trace t...

  19. The RMS Survey: Ammonia and water maser analysis of massive star forming regions

    CERN Document Server

    Urquhart, J S; Figura, C C; Moore, T J T; Lumsden, S L; Hoare, M G; Oudmaijer, R D; Mottram, J C; Davies, B; Dunham, M K

    2011-01-01

    The Red MSX Source (RMS) survey has identified a sample of ~1200 massive young stellar objects (MYSOs), compact and ultra compact HII regions from a sample of ~2000 MSX and 2MASS colour selected sources. We have used the 100 m Green Bank telescope to search for 22-24 GHz water maser and ammonia (1,1), (2,2) and (3,3) emission towards ~600 RMS sources located within the northern Galactic plane. We have identified 308 H2O masers which corresponds to an overall detection rate of ~50%. Abridged: We detect ammonia emission towards 479 of these massive young stars, which corresponds to ~80%. Ammonia is an excellent probe of high density gas allowing us to measure key parameters such as gas temperatures, opacities, and column densities, as well as providing an insight into the gas kinematics. The average kinetic temperature, FWHM line width and total NH3 column density for the sample are approximately 22 K, 2 km/s and 2x10^{15} cm^{-2}, respectively. We find that the NH3 (1,1) line width and kinetic temperature are ...

  20. The JCMT Gould Belt Survey: Evidence for Dust Grain Evolution in Perseus Star-forming Clumps

    CERN Document Server

    Chen, Michael Chun-Yuan; Johnstone, D; Sadavoy, S; Hatchell, J; Mottram, J C; Kirk, H; Buckle, J; Berry, D S; Broekhoven-Fiene, H; Currie, M J; Fich, M; Jenness, T; Nutter, D; Pattle, K; Pineda, J E; Quinn, C; Salji, C; Tisi, S; Hogerheijde, M R; Ward-Thompson, D; Bastien, P; Bresnahan, D; Butner, H; Chrysostomou, A; Coude, S; Davis, C J; Drabek-Maunder, E; Duarte-Cabral, A; Fiege, J; Friberg, P; Friesen, R; Fuller, G A; Graves, S; Greaves, J; Gregson, J; Holland, W; Joncas, G; Kirk, J M; Knee, L B G; Mairs, S; Marsh, K; Matthews, B C; Moriarty-Schieven, G; Mowat, C; Pezzuto, S; Rawlings, J; Richer, J; Robertson, D; Rosolowsky, E; Rumble, D; Schneider-Bontemps, N; Thomas, H; Tothill, N; Viti, S; White, G J; Wouterloot, J; Yates, J; Zhu, M

    2016-01-01

    The dust emissivity spectral index, $\\beta$, is a critical parameter for deriving the mass and temperature of star-forming structures, and consequently their gravitational stability. The $\\beta$ value is dependent on various dust grain properties, such as size, porosity, and surface composition, and is expected to vary as dust grains evolve. Here we present $\\beta$, dust temperature, and optical depth maps of the star-forming clumps in the Perseus Molecular Cloud determined from fitting SEDs to combined Herschel and JCMT observations in the 160 $\\mu$m, 250 $\\mu$m, 350 $\\mu$m, 500 $\\mu$m, and 850 $\\mu$m bands. Most of the derived $\\beta$, and dust temperature values fall within the ranges of 1.0 - 2.7 and 8 - 20 K, respectively. In Perseus, we find the $\\beta$ distribution differs significantly from clump to clump, indicative of grain growth. Furthermore, we also see significant, localized $\\beta$ variations within individual clumps and find low $\\beta$ regions correlate with local temperature peaks, hinting a...

  1. The ACS Nearby Galaxy Survey Treasury VI. The Ancient Star Forming disk of NGC 404

    CERN Document Server

    Williams, Benjamin F; Gilbert, Karoline M; Stilp, Adrienne; Dolphin, Andrew; Seth, Anil C; Weisz, Daniel; Skillman, Evan

    2010-01-01

    We present HST/WFPC2 observations across the disk of the nearby isolated dwarf S0 galaxy NGC 404, which hosts an extended gas disk. Our deepest field reaches the red clump and main-sequence stars with ages 10 Gyr) population. Detailed modeling of the color-magnitude diagram suggests that ~70% of the stellar mass in the NGC 404 disk formed by z~2 (10 Gyr ago) and at least ~90% formed prior to z~1 (8 Gyr ago). These results indicate that the stellar populations of the NGC 404 disk are on average significantly older than those of other nearby disk galaxies, suggesting that early and late type disks may have different long-term evolutionary histories, not simply differences in their recent star formation rates. Comparisons of the spatial distribution of the young stellar mass and FUV emission in GALEX images show that the brightest FUV regions contain the youngest stars, but that some young stars (<160 Myr) lie outside of these regions. FUV luminosity appears to be strongly affected by both age and stellar mas...

  2. Treatment decision-making and the form of risk communication: results of a factorial survey

    Directory of Open Access Journals (Sweden)

    Holmes-Rovner Margaret

    2004-11-01

    Full Text Available Abstract Background Prospective users of preventive therapies often must evaluate complex information about therapeutic risks and benefits. The purpose of this study was to evaluate the effect of relative and absolute risk information on patient decision-making in scenarios typical of health information for patients. Methods Factorial experiments within a telephone survey of the Michigan adult, non-institutionalized, English-speaking population. Average interview lasted 23 minutes. Subjects and sample design: 952 randomly selected adults within a random-digit dial sample of Michigan households. Completion rate was 54.3%. Results When presented hypothetical information regarding additional risks of breast cancer from a medication to prevent a bone disease, respondents reduced their willingness to recommend a female friend take the medication compared to the baseline rate (66.8% = yes. The decrease was significantly greater with relative risk information. Additional benefit information regarding preventing heart disease from the medication increased willingness to recommend the medication to a female friend relative to the baseline scenario, but did not differ between absolute and relative risk formats. When information about both increased risk of breast cancer and reduced risk of heart disease were provided, typical respondents appeared to make rational decisions consistent with Expected Utility Theory, but the information presentation format affected choices. Those 11% – 33% making decisions contrary to the medical indications were more likely to be Hispanic, older, more educated, smokers, and to have children in the home. Conclusions In scenarios typical of health risk information, relative risk information led respondents to make non-normative decisions that were "corrected" when the frame used absolute risk information. This population sample made generally rational decisions when presented with absolute risk information, even in the

  3. Geomorphic process from topographic form: automating the interpretation of repeat survey data in river valleys

    Science.gov (United States)

    Kasprak, Alan; Caster, Joshua J.; Bangen, Sara G.; Sankey, Joel B.

    2017-01-01

    The ability to quantify the processes driving geomorphic change in river valley margins is vital to geomorphologists seeking to understand the relative role of transport mechanisms (e.g. fluvial, aeolian, and hillslope processes) in landscape dynamics. High-resolution, repeat topographic data are becoming readily available to geomorphologists. By contrasting digital elevation models derived from repeat surveys, the transport processes driving topographic changes can be inferred, a method termed ‘mechanistic segregation.’ Unfortunately, mechanistic segregation largely relies on subjective and time consuming manual classification, which has implications both for its reproducibility and the practical scale of its application. Here we present a novel computational workflow for the mechanistic segregation of geomorphic transport processes in geospatial datasets. We apply the workflow to seven sites along the Colorado River in the Grand Canyon, where geomorphic transport is driven by a diverse suite of mechanisms. The workflow performs well when compared to field observations, with an overall predictive accuracy of 84% across 113 validation points. The approach most accurately predicts changes due to fluvial processes (100% accuracy) and aeolian processes (96%), with reduced accuracy in predictions of alluvial and colluvial processes (64% and 73%, respectively). Our workflow is designed to be applicable to a diversity of river systems and will likely provide a rapid and objective understanding of the processes driving geomorphic change at the reach and network scales. We anticipate that such an understanding will allow insight into the response of geomorphic transport processes to external forcings, such as shifts in climate, land use, or river regulation, with implications for process-based river management and restoration.

  4. Star-forming galaxies at z ~ 2: a major science case for the EMIR/GOYA survey on GTC

    CERN Document Server

    Contini, T; Pellò, R; Le Borgne, J F; Kneib, J P

    2004-01-01

    We present the first results of a project aiming to derive the physical properties of high-redshift lensed galaxies, intrinsically fainter than the Lyman break galaxies currently observed in the field. From FORS and ISAAC spectroscopy on the VLT, we use the full rest-frame UV-to-optical range to derive the physical properties (SFR, extinction, chemical abundances, dynamics, mass, etc) of low-luminosity z ~ 2 star-forming galaxies. Although the sample is still too small for statistical studies, these results give an insight into the nature and evolutionary status of distant star-forming objects and their link with present-day galaxies. Such a project will serve as a basis for the scientific analysis of the EMIR/GOYA survey on the GTC.

  5. CHESS, Chemical Herschel surveys of star forming regions:Peering into the protostellar shock L1157-B1

    CERN Document Server

    Lefloch, B; Codella, C; Melnick, G; Cernicharo, J; Caux, E; Benedettini, M; Boogert, A; Caselli, P; Ceccarelli, C; Gueth, F; Hily-Blant, P; Lorenzani, A; Neufeld, D; Nisini, B; Pacheco, S; Pagani, L; Pardo, J R; Parise, B; Salez, M; Schuster, K; Viti, S; Bacmann, A; Baudry, A; Bell, T; Bergin, E A; Blake, G; Bottinelli, S; Castets, A; Comito, C; Coutens, A; Crimier, N; Dominik, C; Demyk, K; Encrenaz, P; Falgarone, E; Fuente, A; Gerin, M; Goldsmith, P; Helmich, F; Hennebelle, P; Henning, T; Herbst, E; Jacq, T; Kahane, C; Kama, M; Klotz, A; Langer, W; Lis, D; Lord, S; Maret, S; Pearson, J; Phillips, T; Saraceno, P; Schilke, P; Tielens, X; van der Tak, F; van der Wiel, M; Vastel, C; Wakelam, V; Walters, A; Wyrowski, F; Yorke, H; Bachiller, R; Borys, C; De Lange, G; Delorme, Y; Kramer, C; Larsson, B; Lai, R; Maiwald, F W; Martin-Pintado, J; Mehdi, I; Ossenkopf, V; Siegel, P; Stutzki, J; Wunsch, J H

    2010-01-01

    The outflow driven by the low-mass class 0 protostar L1157 is the prototype of the so-called chemically active outflows. The bright bowshock B1 in the southern outflow lobe is a privileged testbed of magneto-hydrodynamical (MHD) shock models, for which dynamical and chemical processes are strongly interdependent. We present the first results of the unbiased spectral survey of the L1157-B1 bowshock, obtained in the framework of the key program "Chemical Herschel Surveys of Star Forming Regions" (CHESS). The main aim is to trace the warm and chemically enriched gas and to infer the excitation conditions in the shock region. The CO 5-4 and H2O lines have been detected at high-spectral resolution in the unbiased spectral survey of the HIFI-Band 1b spectral window (555-636 GHz), presented by Codella et al. in this volume. Complementary ground-based observations in the submm window help establish the origin of the emission detected in the main-beam of HIFI, and the physical conditions in the shock.}{Both lines exhi...

  6. The FMOS-COSMOS survey of star-forming galaxies at z~1.6 III. Survey design, performance, and sample characteristics

    CERN Document Server

    Silverman, J D; Arimoto, N; Renzini, A; Rodighiero, G; Daddi, E; Sanders, D; Kartaltepe, J; Zahid, J; Nagao, T; Kewley, L J; Lilly, S J; Sugiyama, N; Capak, P; Carollo, C M; Chu, J; Hasinger, G; Ilbert, O; Kajisawa, M; Koekemoer, A M; Kovac, K; Fevre, O Le; Masters, D; McCracken, H J; Onodera, M; Scoville, N; Strazzullo, V; Taniguchi, Y

    2014-01-01

    We present a spectroscopic survey of galaxies in the COSMOS field using the Fiber Multi-Object Spectrograph (FMOS), a near-infrared instrument on the Subaru Telescope. Our survey is specifically designed to detect the Halpha emission line that falls within the H-band (1.6-1.8 micron) spectroscopic window from star-forming galaxies with M_stellar>10^10 Msolar and 1.4 < z < 1.7. With the high multiplex capabilities of FMOS, it is now feasible to construct samples of over one thousand galaxies having spectroscopic redshifts at epochs that were previously challenging. The high-resolution mode (R~2600) is implemented to effectively separate Halpha and [NII] emission lines thus enabling studies of gas-phase metallicity and photoionization conditions of the interstellar medium. The broad goals of our program are concerned with how star formation depends on stellar mass and environment, both recognized as drivers of galaxy evolution at lower redshifts. In addition to the main galaxy sample, our target selection...

  7. On-the-Job Ethics – Proximity Morality Forming in Medical School: A grounded theory analysis using survey data

    Directory of Open Access Journals (Sweden)

    Hans O. Thulesius, MD, Ph.D.

    2009-03-01

    Full Text Available On-the-job-ethics exist in all businesses and can also be called proximity morality forming. In this paper we propose that medical students take a proximity morality stance towards ethics education at medical school. This means that they want to form physician morality “on the job” instead of being taught ethics like any other subject. On-the-job-ethics for medical students involves learning ethics that is used when practicing ethics. Learning ethics includes comprehensive ethics courses in which quality lectures provide ethics grammar useful for the ethics practicing in attitude exercises and vignette reflections in tutored group discussions. On-the-job-ethics develops professional identity, handles diversity of religious and existential worldviews, trains students described as ethically naive, processes difficult clinical experiences, and desists negative role modeling from physicians in clinical or teaching situations. This grounded theory analysis was made from a questionnaire survey on attitudes to ethics education with 409 Swedish medical students participating. We analyzed over 8000 words of open-ended responses and multiplechoice questions using classic grounded theory procedures, but also compared questionnaire data using statistics such as multiple regression models. The paper gives an example of how grounded theory can be used with a limited amount of survey data.

  8. An HST Imaging Survey of Low-Mass Stars in the Chamaeleon I Star Forming region

    CERN Document Server

    Robberto, M; Da Rio, N; Apai, D; Pascucci, I; Ricci, L; Goddi, C; Testi, L; Palla, F; Bacciotti, F

    2012-01-01

    We present new HST/WFPC2 observations of 20 fields centered around T Tauri stars in the Chamaeleon I star forming region. Images have been obtained in the F631N ([OI]6300A), F656N (Ha) and F673N ([SII]6716A+6731A) narrow-band filters, plus the Johnson V-band equivalent F547M filter. We detect 31 T Tauri stars falling within our fields. We discuss the optical morphology of 10 sources showing evidence of either binarity, circumstellar material, or mass loss. We supplement our photometry with a compilation of optical, infrared and sub-millimeter data from the literature, together with new sub-mm data for three objects, to build the Spectral Energy Distributions (SED) of 19 single sources. Using an SED model fitting tool, we self-consistently estimate a number of stellar and disk parameters, while mass accretion rates are directly derived from our Ha photometry. We find that bolometric luminosities derived from dereddened optical data tend to be underestimated in systems with high alpha(2-24} IR spectral index, s...

  9. The JCMT Nearby Galaxies Legacy Survey I. Star Forming Molecular Gas in Virgo Cluster Spiral Galaxies

    CERN Document Server

    Wilson, C D; Israel, F P; Serjeant, S; Bendo, G; Brinks, E; Clements, D; Courteau, S; Irwin, J; Knapen, J H; Leech, J; Matthews, H E; Muehle, S; Mortier, A M J; Petitpas, G; Sinukoff, E; Spekkens, K; Tan, B K; Tilanus, R P J; Usero, A; Van der Werf, P P; Wiegert, T; Zhu, M

    2008-01-01

    We present large-area maps of the CO J=3-2 emission obtained at the James Clerk Maxwell Telescope for four spiral galaxies in the Virgo Cluster. We combine these data with published CO J=1-0, 24 micron, and Halpha images to measure the CO line ratios, molecular gas masses, and instantaneous gas depletion times. For three galaxies in our sample (NGC 4254, NGC4321, and NGC 4569), we obtain molecular gas masses of 7E8-3E9 Msun and disk-averaged instantaneous gas depletion times of 1.1-1.7 Gyr. We argue that the CO J=3-2 line is a better tracer of the dense star forming molecular gas than the CO J=1-0 line, as it shows a better correlation with the star formation rate surface density both within and between galaxies. NGC 4254 appears to have a larger star formation efficiency(smaller gas depletion time), perhaps because it is on its first passage through the Virgo Cluster. NGC 4569 shows a large-scale gradient in the gas properties traced by the CO J=3-2/J=1-0 line ratio, which suggests that its interaction with ...

  10. An Infrared/X-ray Survey for New Members of the Taurus Star-Forming Region

    CERN Document Server

    Luhman, K L; Allen, P R; Cruz, K L

    2009-01-01

    We present the results of a search for new members of the Taurus star-forming region using data from the Spitzer Space Telescope and the XMM-Newton Observatory. We have obtained optical and near-infrared spectra of 44 sources that exhibit red Spitzer colors that are indicative of stars with circumstellar disks and 51 candidate young stars that were identified by Scelsi and coworkers using XMM-Newton. We also performed spectroscopy on four possible companions to members of Taurus that were reported by Kraus and Hillenbrand. Through these spectra, we have demonstrated the youth and membership of 41 sources, 10 of which were independently confirmed as young stars by Scelsi and coworkers. Five of the new Taurus members are likely to be brown dwarfs based on their late spectral types (>M6). One of the brown dwarfs has a spectral type of L0, making it the first known L-type member of Taurus and the least massive known member of the region (M=4-7 M_Jup). Another brown dwarf exhibits a flat infrared spectral energy d...

  11. Sejong open cluster survey (SOS) - V. The active star forming region Sh 2-255 -- 257

    CERN Document Server

    Lim, Beomdu; Hur, Hyeonoh; Lee, Byeong-Cheol; Bessell, Michael S; Kim, Jinyoung S; Lee, Kang Hwan; Park, Byeong-Gon; Jeong, Gwanghui

    2015-01-01

    There is much observational evidence that active star formation is taking place in the HII regions Sh 2-255 -- 257. We present a photometric study of this star forming region (SFR) using imaging data obtained in passbands from the optical to the mid-infrared in order to study the star formation process. A total of 218 members were identified using various selection criteria based on their observational properties. The SFR is reddened by at least E(B-V) = 0.8 mag, and the reddening law toward the region is normal (R_V = 3.1). From the zero-age main sequence fitting method it is confirmed that the SFR is 2.1 +/- 0.3 kpc from the Sun. The median age of the identified members is estimated to be about 1.3 Myr from comparison of the Hertzsprung-Russell diagram (HRD) with stellar evolutionary models. The initial mass function (IMF) is derived from the HRD and the near-infrared (J, J-H) color-magnitude diagram. The slope of the IMF is about Gamma = -1.6 +/- 0.1, which is slightly steeper than that of the Salpeter/Kro...

  12. The history of star-forming galaxies in the Sloan Digital Sky Survey

    CERN Document Server

    Asari, N V; Stasinska, G; Torres-Papaqui, J P; Mateus, A; Sodré, L; Schoenell, W; Gomes, J M

    2007-01-01

    We study the evolution of 82302 star-forming (SF) galaxies from the SDSS. Our main goals are to explore new ways of handling star formation histories (SFH) obtained with our publicly available spectral synthesis code STARLIGHT, and apply them to investigate how SFHs vary as a function of nebular metallicity (Zneb). Our main results are: (1) A conventional correlation analysis shows how global properties such as luminosity, mass, dust content, mean stellar metallicity and mean stellar age relate to Zneb. (2) We present a simple formalism which compresses the results of the synthesis into time-dependent star formation rates (SFR) and mass assembly histories. (3) The current SFR derived from the population synthesis and that from H-alpha are shown to agree within a factor of two. Thus we now have a way to estimate SFR in AGN hosts, where the H-alpha method cannot be applied. (4) Fully time-dependent SFHs are derived for all galaxies and averaged over six Zneb bins spanning the entire SF wing in the [OIII]/H-beta...

  13. A brief survey of constrained mechanics and variational problems in terms of differential forms

    Science.gov (United States)

    Hermann, Robert

    1994-01-01

    There has been considerable interest recently in constrained mechanics and variational problems. This is in part due to applied interests (such as 'non-holonomic mechanics in robotics') and in other part due to the fact that several schools of 'pure' mathematics have found that this classical subject is of importance for what they are trying to do. I have made various attempts at developing these subjects since my Lincoln lab days of the late 1950's. In this Chapter, I will sketch a Unified point of view, using Cartan's approach with differential forms. This has the advantage from the C-O-R viewpoint being developed in this Volume that the extension from 'smooth' to 'generalized' data is very systematic and algebraic. (I will only deal with the 'smooth' point of view in this Chapter; I will develop the 'generalized function' material at a later point.) The material presented briefly here about Variational Calculus and Constrained Mechanics can be found in more detail in my books, 'Differential Geometry and the Calculus of Variations', 'Lie Algebras and Quantum Mechanics', and 'Geometry, Physics and Systems'.

  14. Spitzer Infrared Spectrograph survey of young stars in the Chamaeleon I star-forming region

    CERN Document Server

    Manoj, P; Furlan, E; McClure, M K; Luhman, K L; Watson, D M; Espaillat, C; Calvet, N; Najita, J R; D'Alessio, P; Adame, L; Sargent, B A; Forrest, W J; Bohac, C; Green, J D; Arnold, L A

    2011-01-01

    We present 5 to 36 micron mid-infrared spectra of 82 young stars in the ~2 Myr old Chamaeleon I star-forming region, obtained with the Spitzer Infrared Spectrograph (IRS). We have classified these objects into various evolutionary classes based on their spectral energy distributions and the spectral features seen in the IRS spectra. We have analyzed the mid-IR spectra of Class II objects in Chamaeleon I in detail, in order to study the vertical and radial structure of the protoplanetary disks surrounding these stars. We find evidence for substantial dust settling in most protoplanetary disks in Chamaeleon I. We have identified several disks with altered radial structures in Chamaeleon I, among them transitional disk candidates which have holes or gaps in their disks. Analysis of the silicate emission features in the IRS spectra of Class II objects in Chamaeleon I shows that the dust grains in these disks have undergone significant processing (grain growth and crystallization). However, disks with radial holes...

  15. Phobos Sample Return mission

    Science.gov (United States)

    Zelenyi, Lev; Zakharov, A.; Martynov, M.; Polischuk, G.

    Very mysterious objects of the Solar system are the Martian satellites, Phobos and Deimos. Attempt to study Phobos in situ from an orbiter and from landers have been done by the Russian mission FOBOS in 1988. However, due to a malfunction of the onboard control system the landers have not been delivered to the Phobos surface. A new robotics mission to Phobos is under development now in Russia. Its main goal is the delivery of samples of the Phobos surface material to the Earth for laboratory studies of its chemical, isotopic, mineral composition, age etc. Other goals are in situ studies of Phobos (regolith, internal structure, peculiarities in orbital and proper rotation), studies of Martian environment (dust, plasma, fields). The payload includes a number of scientific instruments: gamma and neutron spectrometers, gaschromatograph, mass spectrometers, IR spectrometer, seismometer, panoramic camera, dust sensor, plasma package. To implement the tasks of this mission a cruise-transfer spacecraft after the launch and the Earth-Mars interplanetary flight will be inserted into the first elliptical orbit around Mars, then after several corrections the spacecraft orbit will be formed very close to the Phobos orbit to keep the synchronous orbiting with Phobos. Then the spacecraft will encounter with Phobos and will land at the surface. After the landing the sampling device of the spacecraft will collect several samples of the Phobos regolith and will load these samples into the return capsule mounted at the returned vehicle. This returned vehicle will be launched from the mother spacecraft and after the Mars-Earth interplanetary flight after 11 monthes with reach the terrestrial atmosphere. Before entering into the atmosphere the returned capsule will be separated from the returned vehicle and will hopefully land at the Earth surface. The mother spacecraft at the Phobos surface carrying onboard scientific instruments will implement the "in situ" experiments during an year

  16. Validation of a short form Wisconsin Upper Respiratory Symptom Survey (WURSS-21

    Directory of Open Access Journals (Sweden)

    Highstrom Alex D

    2009-08-01

    Full Text Available Abstract Background The Wisconsin Upper Respiratory Symptom Survey (WURSS is an illness-specific health-related quality-of-life questionnaire outcomes instrument. Objectives Research questions were: 1 How well does the WURSS-21 assess the symptoms and functional impairments associated with common cold? 2 How well can this instrument measure change over time (responsiveness? 3 What is the minimal important difference (MID that can be detected by the WURSS-21? 4 What are the descriptive statistics for area under the time severity curve (AUC? 5 What sample sizes would trials require to detect MID or AUC criteria? 6 What does factor analysis tell us about the underlying dimensional structure of the common cold? 7 How reliable are items, domains, and summary scores represented in WURSS? 8 For each of these considerations, how well does the WURSS-21 compare to the WURSS-44, Jackson, and SF-8? Study Design and Setting People with Jackson-defined colds were recruited from the community in and around Madison, Wisconsin. Participants were enrolled within 48 hours of first cold symptom and monitored for up to 14 days of illness. Half the sample filled out the WURSS-21 in the morning and the WURSS-44 in the evening, with the other half reversing the daily order. External comparators were the SF-8, a 24-hour recall general health measure yielding separate physical and mental health scores, and the eight-item Jackson cold index, which assesses symptoms, but not functional impairment or quality of life. Results In all, 230 participants were monitored for 2,457 person-days. Participants were aged 14 to 83 years (mean 34.1, SD 13.6, majority female (66.5%, mostly white (86.0%, and represented substantive education and income diversity. WURSS-21 items demonstrated similar performance when embedded within the WURSS-44 or in the stand-alone WURSS-21. Minimal important difference (MID and Guyatt's responsiveness index were 10.3, 0.71 for the WURSS-21 and 18.5, 0

  17. Sejong Open Cluster Survey (SOS) - V. The Active Star Forming Region SH 2-255-257

    Science.gov (United States)

    Lim, Beomdu; Sung, Hwankyung; Hur, Hyeonoh; Lee, Byeong-Cheol; Bessell, Michael S.; Kim, Jinyoung S.; Lee, Kang Hwan; Park, Byeong-Gon; Jeong, Gwanghui

    2015-12-01

    There is much observational evidence that active star formation is taking place in the H II regions Sh 2-255-257. We present a photometric study of this star forming region (SFR) using imaging data obtained in passbands from the optical to the mid-infrared, in order to study the star formation process. A total of 218 members were identified using various selection criteria based on their observational properties. The SFR is reddened by at least E(B-V) = 0.8 mag, and the reddening law toward the region is normal (R_V = 3.1). From the zero-age main sequence fitting method it is confirmed that the SFR is 2.1 ± 0.3 kpc from the Sun. The median age of the identified members is estimated to be about 1.3 Myr from a comparison of the Hertzsprung-Russell diagram (HRD) with stellar evolutionary models. The initial mass function (IMF) is derived from the HRD and the near-infrared (J, J-H) color-magnitude diagram. The slope of the IMF is about Γ = -1.6 ± 0.1, which is slightly steeper than that of the Salpeter/Kroupa IMF. It implies that low-mass star formation is dominant in the SFR. The sum of the masses of all the identified members provides the lower limit of the cluster mass (169 M_{⊙}). We also analyzed the spectral energy distribution (SED) of pre-main sequence stars using the SED fitting tool of Robitaille et al., and confirm that there is a significant discrepancy between stellar mass and age obtained from two different methods based on the SED fitting tool and the HRD.

  18. The K20 survey. II. The Different Spatial Clustering of z~1 Old and Dusty Star-Forming EROs

    CERN Document Server

    Daddi, E; Broadhurst, T J; Renzini, A; Zamorani, G; Mignoli, M; Saracco, P; Fontana, A; Pozzetti, L; Poli, F; Cristiani, S; D'Odorico, S; Giallongo, E; Gilmozzi, R; Menci, N

    2002-01-01

    We compare the 3D clustering of old passively-evolving and dusty star-forming z~1 EROs from the K20 survey. With detailed simulations of clustering, the comoving correlation length of dusty star-forming EROs is constrained to be less than r_0~2.5 Mpc/h. In contrast, the old EROs are much more positively correlated, with 5.5<~r_0/(Mpc/h)<~16, consistent with previous claims for z~1 field early-type galaxies based on analyses of ERO angular clustering. The low level of clustering of dusty star-forming EROs does not support these to be major mergers building up an elliptical galaxy, or typical counterparts of SCUBA sources, but it is instead consistent with the weak clustering of high redshift blue galaxies and of luminous local IRAS galaxies. Current hierarchical merging models can explain the large r_0 for z~1 field early-type galaxies, but fail in matching their high number density and overall old ages.

  19. The SAMI Galaxy Survey: energy sources of the turbulent velocity dispersion in spatially resolved local star-forming galaxies

    Science.gov (United States)

    Zhou, Luwenjia; Federrath, Christoph; Yuan, Tiantian; Bian, Fuyan; Medling, Anne M.; Shi, Yong; Bland-Hawthorn, Joss; Bryant, Julia J.; Brough, Sarah; Catinella, Barbara; Croom, Scott M.; Goodwin, Michael; Goldstein, Gregory; Green, Andrew W.; Konstantopoulos, Iraklis S.; Lawrence, Jon S.; Owers, Matt S.; Richards, Samuel N.; Sanchez, Sebastian F.

    2017-10-01

    We investigate the energy sources of random turbulent motions of ionized gas from H α emission in eight local star-forming galaxies from the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey. These galaxies satisfy strict pure star-forming selection criteria to avoid contamination from active galactic nuclei (AGNs) or strong shocks/outflows. Using the relatively high spatial and spectral resolution of SAMI, we find that - on sub-kpc scales, our galaxies display a flat distribution of ionized gas velocity dispersion as a function of star formation rate (SFR) surface density. A major fraction of our SAMI galaxies shows higher velocity dispersion than predictions by feedback-driven models, especially at the low SFR surface density end. Our results suggest that additional sources beyond star formation feedback contribute to driving random motions of the interstellar medium in star-forming galaxies. We speculate that gravity, galactic shear and/or magnetorotational instability may be additional driving sources of turbulence in these galaxies.

  20. Molecular and atomic line surveys of galaxies I: the dense, star-forming phase as a beacon

    CERN Document Server

    Geach, James E

    2012-01-01

    We predict the space density of molecular gas reservoirs in the Universe, and place a lower limit on the number counts of carbon monoxide (CO), hydrogen cyanide (HCN) molecular and [CII] atomic emission lines in blind redshift surveys in the submillimeter-centimeter spectral regime. Our model uses: (a) recently available HCN Spectral Line Energy Distributions (SLEDs) of local Luminous Infrared Galaxies (LIRGs, L_IR>10^11 L_sun), (b) a value for epsilon=SFR/M_dense(H_2) provided by new developments in the study of star formation feedback on the interstellar medium and (c) a model for the evolution of the infrared luminosity density. Minimal 'emergent' CO SLEDs from the dense gas reservoirs expected in all star-forming systems in the Universe are then computed from the HCN SLEDs since warm, HCN-bright gas will necessarily be CO-bright, with the dense star-forming gas phase setting an obvious minimum to the total molecular gas mass of any star-forming galaxy. We include [CII] as the most important of the far-inf...

  1. The CHESS spectral survey of star forming regions : Peering into the protostellar shock L1157-B1. I. Shock chemical complexity

    NARCIS (Netherlands)

    Codella, C.; Lefloch, B.; Ceccarelli, C.; Cernicharo, J.; Caux, E.; Lorenzani, A.; Viti, S.; Hily-Blant, P.; Parise, B.; Maret, S.; Nisini, B.; Caselli, P.; Cabrit, S.; Pagani, L.; Benedettini, M.; Boogert, A.; Gueth, F.; Melnick, G.; Neufeld, D.; Pacheco, S.; Salez, M.; Schuster, K.; Bacmann, A.; Baudry, A.; Bell, T.; Bergin, E. A.; Blake, G.; Bottinelli, S.; Castets, A.; Comito, C.; Coutens, A.; Crimier, N.; Dominik, C.; Demyk, K.; Encrenaz, P.; Falgarone, E.; Fuente, A.; Gerin, M.; Goldsmith, P.; Helmich, F.; Hennebelle, P.; Henning, Th; Herbst, E.; Jacq, T.; Kahane, C.; Kama, M.; Klotz, A.; Langer, W.; Lis, D.; Lord, S.; Pearson, J.; Phillips, T.; Saraceno, P.; Schilke, P.; Tielens, X.; van der Tak, F.; van der Wiel, M.; Vastel, C.; Wakelam, V.; Walters, A.; Wyrowski, F.; Yorke, H.; Borys, C.; Delorme, Y.; Kramer, C.; Larsson, B.; Mehdi, I.; Ossenkopf, V.; Stutzki, J.

    2010-01-01

    We present the first results of the unbiased survey of the L1157-B1 bow shock, obtained with HIFI in the framework of the key program Chemical HErschel Survey of Star forming regions (CHESS). The L1157 outflow is driven by a low-mass Class 0 protostar and is considered the prototype

  2. A Survey on Security Isolation of Virtualization, Containers, and Unikernels

    Science.gov (United States)

    2017-05-01

    ARL-TR-8029 ● MAY 2017 US Army Research Laboratory A Survey on Security Isolation of Virtualization, Containers, and Unikernels...needed. Do not return it to the originator. ARL-TR-8029 ● MAY 2017 US Army Research Laboratory A Survey on Security Isolation...with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 1

  3. ALMA REDSHIFTS OF MILLIMETER-SELECTED GALAXIES FROM THE SPT SURVEY: THE REDSHIFT DISTRIBUTION OF DUSTY STAR-FORMING GALAXIES

    Energy Technology Data Exchange (ETDEWEB)

    Weiss, A. [Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel 69, D-53121 Bonn (Germany); De Breuck, C.; Aravena, M.; Biggs, A. D. [European Southern Observatory, Karl-Schwarzschild Strasse, D-85748 Garching bei Muenchen (Germany); Marrone, D. P.; Bothwell, M. [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Vieira, J. D.; Bock, J. J. [California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Aguirre, J. E. [University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States); Aird, K. A. [University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States); Ashby, M. L. N.; Bayliss, M. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L. [Kavli Institute for Cosmological Physics, University of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637 (United States); Bethermin, M. [Laboratoire AIM-Paris-Saclay, CEA/DSM/Irfu - CNRS - Universite Paris Diderot, CEA-Saclay, Orme des Merisiers, F-91191 Gif-sur-Yvette (France); Bradford, C. M. [Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Brodwin, M. [Department of Physics and Astronomy, University of Missouri, 5110 Rockhill Road, Kansas City, MO 64110 (United States); Chapman, S. C. [Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 3J5 Canada (Canada); and others

    2013-04-10

    Using the Atacama Large Millimeter/submillimeter Array, we have conducted a blind redshift survey in the 3 mm atmospheric transmission window for 26 strongly lensed dusty star-forming galaxies (DSFGs) selected with the South Pole Telescope. The sources were selected to have S{sub 1.4{sub mm}} > 20 mJy and a dust-like spectrum and, to remove low-z sources, not have bright radio (S{sub 843{sub MHz}} < 6 mJy) or far-infrared counterparts (S{sub 100{sub {mu}m}} < 1 Jy, S{sub 60{sub {mu}m}} < 200 mJy). We robustly detect 44 line features in our survey, which we identify as redshifted emission lines of {sup 12}CO, {sup 13}CO, C I, H{sub 2}O, and H{sub 2}O{sup +}. We find one or more spectral features in 23 sources yielding a {approx}90% detection rate for this survey; in 12 of these sources we detect multiple lines, while in 11 sources we detect only a single line. For the sources with only one detected line, we break the redshift degeneracy with additional spectroscopic observations if available, or infer the most likely line identification based on photometric data. This yields secure redshifts for {approx}70% of the sample. The three sources with no lines detected are tentatively placed in the redshift desert between 1.7 < z < 2.0. The resulting mean redshift of our sample is z-bar = 3.5. This finding is in contrast to the redshift distribution of radio-identified DSFGs, which have a significantly lower mean redshift of z-bar = 2.3 and for which only 10%-15% of the population is expected to be at z > 3. We discuss the effect of gravitational lensing on the redshift distribution and compare our measured redshift distribution to that of models in the literature.

  4. THE FMOS-COSMOS SURVEY OF STAR-FORMING GALAXIES AT z ∼ 1.6. III. SURVEY DESIGN, PERFORMANCE, AND SAMPLE CHARACTERISTICS

    Energy Technology Data Exchange (ETDEWEB)

    Silverman, J. D.; Sugiyama, N. [Kavli Institute for the Physics and Mathematics of the Universe (WPI), The University of Tokyo Institutes for Advanced Study, The University of Tokyo, Kashiwa, 277-8583 (Japan); Kashino, D. [Division of Particle and Astrophysical Science, Graduate School of Science, Nagoya University, Nagoya, 464-8602 (Japan); Sanders, D.; Zahid, J.; Kewley, L. J.; Chu, J.; Hasinger, G. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI, 96822 (United States); Kartaltepe, J. S. [National Optical Astronomy Observatory, 950 N. Cherry Ave., Tucson, AZ, 85719 (United States); Arimoto, N. [Subaru Telescope, 650 North A’ohoku Place, Hilo, Hawaii, 96720 (United States); Renzini, A. [Instituto Nazionale de Astrofisica, Osservatorio Astronomico di Padova, vicolo dell’Osservatorio 5, I-35122, Padova, Italy, EU (Italy); Rodighiero, G.; Baronchelli, I. [Dipartimento di Fisica e Astronomia, Universita di Padova, vicolo Osservatorio, 3, I-35122, Padova (Italy); Daddi, E.; Juneau, S. [Laboratoire AIM, CEA/DSM-CNRS-Universite Paris Diderot, Irfu/Service d’Astrophysique, CEA Saclay (France); Nagao, T. [Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577 (Japan); Lilly, S. J.; Carollo, C. M. [Institute of Astronomy, ETH Zürich, CH-8093, Zürich (Switzerland); Capak, P. [Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125 (United States); Ilbert, O., E-mail: john.silverman@ipmu.jp [Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, F-13388, Marseille (France); and others

    2015-09-15

    We present a spectroscopic survey of galaxies in the COSMOS field using the Fiber Multi-object Spectrograph (FMOS), a near-infrared instrument on the Subaru Telescope. Our survey is specifically designed to detect the Hα emission line that falls within the H-band (1.6–1.8 μm) spectroscopic window from star-forming galaxies with 1.4 < z < 1.7 and M{sub stellar} ≳ 10{sup 10} M{sub ⊙}. With the high multiplex capability of FMOS, it is now feasible to construct samples of over 1000 galaxies having spectroscopic redshifts at epochs that were previously challenging. The high-resolution mode (R ∼ 2600) effectively separates Hα and [N ii]λ6585, thus enabling studies of the gas-phase metallicity and photoionization state of the interstellar medium. The primary aim of our program is to establish how star formation depends on stellar mass and environment, both recognized as drivers of galaxy evolution at lower redshifts. In addition to the main galaxy sample, our target selection places priority on those detected in the far-infrared by Herschel/PACS to assess the level of obscured star formation and investigate, in detail, outliers from the star formation rate (SFR)—stellar mass relation. Galaxies with Hα detections are followed up with FMOS observations at shorter wavelengths using the J-long (1.11–1.35 μm) grating to detect Hβ and [O iii]λ5008 which provides an assessment of the extinction required to measure SFRs not hampered by dust, and an indication of embedded active galactic nuclei. With 460 redshifts measured from 1153 spectra, we assess the performance of the instrument with respect to achieving our goals, discuss inherent biases in the sample, and detail the emission-line properties. Our higher-level data products, including catalogs and spectra, are available to the community.

  5. ALMA redshifts of millimeter-selected galaxies from the SPT survey: The redshift distribution of dusty star-forming galaxies

    CERN Document Server

    Weiss, A; Marrone, D P; Vieira, J D; Aguirre, J E; Aird, K A; Aravena, M; Ashby, M L N; Bayliss, M; Benson, B A; Bethermin, M; Biggs, A D; Bleem, L E; Bock, J J; Bothwell, M; Bradford, C M; Brodwin, M; Carlstrom, J E; Chang, C L; Chapman, S C; Crawford, T M; Crites, A T; de Haan, T; Dobbs, M A; Downes, T P; Fassnacht, C D; George, E M; Gladders, M D; Gonzalez, A H; Greve, T R; Halverson, N W; Hezaveh, Y D; High, F W; Holder, G P; Holzapfel, W L; Hoover, S; Hrubes, J D; Husband, K; Keisler, R; Lee, A T; Leitch, E M; Lueker, M; Luong-Van, D; Malkan, M; McIntyre, V; McMahon, J J; Mehl, J; Menten, K M; Meyer, S S; Murphy, E J; Padin, S; Plagge, T; Reichardt, C L; Rest, A; Rosenman, M; Ruel, J; Ruhl, J E; Schaffer, K K; Shirokoff, E; Spilker, J S; Stalder, B; Staniszewski, Z; Stark, A A; Story, K; Vanderlinde, K; Welikala, N; Williamson, R

    2013-01-01

    Using the Atacama Large Millimeter/submillimeter Array (ALMA), we have conducted a blind redshift survey in the 3 mm atmospheric transmission window for 26 strongly lensd dusty star-forming galaxies (DSFGs) selected with the South Pole Telescope (SPT). The sources were selected to have S_1.4mm>20 mJy and a dust-like spectrum and, to remove low-z sources, not have bright radio (S_843MHz=3.5. This finding is in contrast to the redshift distribution of radio-identified DSFGs, which have a significantly lower mean redshift of =2.3 and for which only 10-15% of the population is expected to be at z>3. We discuss the effect of gravitational lensing on the redshift distribution and compare our measured redshift distribution to that of models in the literature.

  6. Combining floristic and growth form composition in a gradient- directed vegetation survey of Matjiesrivier Nature Reserve, Western Cape, South Africa

    Directory of Open Access Journals (Sweden)

    R. G. Lechmere-Oertel

    2000-12-01

    Full Text Available The floristically complex vegetation of Matjiesrivier Nature Reserve (MNR. which spans the ecotone between the Fynbos and Succulent Karoo Biomes in the eastern Cederberg Mountains, Western Cape, was surveyed using a gradient-directed transect (gradsect. The gradsect was aligned with a topo-ciimatic aridity gradient across MNR. The vegetation was classified using TWINSPAN. based on a combination of floristic and growth form characteristics, and an understanding of the main ecological gradients controlling vegetation distribution. The final classification described seven robust and eco­logically meaningful communities that represented a trade-off between statistical rigour and practicality for management. The seven communities were mapped using a geographical information system (GIS.

  7. Mid-Infrared Luminosity Function of Local Star-Forming Galaxies in the NEP-Wide Survey Field of AKARI

    CERN Document Server

    Kim, Seong Jin; Jeong, Woong-Seob; Goto, Tomotsugu; Matsuhara, Hideo; Im, Myungshin; Shim, Hyunjin; Kim, Min Gyu; Lee, Myung Gyoon

    2015-01-01

    We present mid-infrared (MIR) luminosity functions (LFs) of local star-forming (SF) galaxies in the AKARI NEP-Wide Survey field. In order to derive more accurate luminosity function, we used spectroscopic sample only. Based on the NEP-Wide point source catalogue containing a large number of infrared (IR) sources distributed over the wide (5.4 sq. deg.) field, we incorporated the spectroscopic redshift data for about 1790 selected targets obtained by optical follow-up surveys with MMT/Hectospec and WIYN/Hydra. The AKARI continuous 2 to 24 micron wavelength coverage as well as photometric data from optical u band to NIR H-band with the spectroscopic redshifts for our sample galaxies enable us to derive accurate spectral energy distributions (SEDs) in the mid-infrared. We carried out SED fit analysis and employed 1/Vmax method to derive the MIR (8, 12, and 15 micron rest-frame) luminosity functions. We fit our 8 micron LFs to the double power-law with the power index of alpha= 1.53 and beta= 2.85 at the break lu...

  8. The Atacama Cosmology Telescope: Dusty Star-Forming Galaxies and Active Galactic Nuclei in the Southern Survey

    CERN Document Server

    Marsden, Danica; Marriage, Tobias A; Switzer, Eric R; Partridge, Bruce; Massardi, Marcella; Morales, Gustavo; Addison, Graeme; Bond, J Richard; Crichton, Devin; Das, Sudeep; Devlin, Mark; Dunner, Rolando; Hajian, Amir; Hilton, Matt; Hincks, Adam; Hughes, John P; Irwin, Kent; Kosowsky, Arthur; Menanteau, Felipe; Moodley, Kavilan; Niemack, Michael; Page, Lyman; Reese, Erik D; Schmitt, Benjamin; Sehgal, Neelima; Sievers, Jonathan; Staggs, Suzanne; Swetz, Daniel; Thornton, Robert; Wollack, Edward

    2013-01-01

    We present a catalog of 191 extragalactic sources detected by the Atacama Cosmology Telescope (ACT) at 148 GHz and/or 218 GHz in the 2008 Southern survey. Flux densities span 14-1700 mJy, and we use source spectral indices derived using ACT-only data to divide our sources into two sub-populations: 167 radio galaxies powered by central active galactic nuclei (AGN), and 24 dusty star-forming galaxies (DSFGs). We cross-identify 97% of our sources (166 of the AGN and 19 of the DSFGs) with those in currently available catalogs. When combined with flux densities from the Australian Telescope 20 GHz survey and follow-up observations with the Australia Telescope Compact Array, the synchrotron-dominated population is seen to exhibit a steepening of the slope of the spectral energy distribution from 20 to 148 GHz, with the trend continuing to 218 GHz. The ACT dust-dominated source population has a median spectral index of 3.7+0.62-0.86, and includes both local galaxies and sources with redshifts as great as 5.6. Dusty ...

  9. X-ray properties of radio-selected star forming galaxies in the Chandra-COSMOS survey

    CERN Document Server

    Ranalli, P; Zamorani, G; Cappelluti, N; Civano, F; Georgantopoulos, I; Gilli, R; Schinnerer, E; Smolcic, V; Vignali, C

    2012-01-01

    X-ray surveys contain sizable numbers of star forming galaxies, beyond the AGN which usually make the majority of detections. Many methods to separate the two populations are used in the literature, based on X-ray and multiwavelength properties. We aim at a detailed test of the classification schemes and to study the X-ray properties of the resulting samples. We build on a sample of galaxies selected at 1.4 GHz in the VLA-COSMOS survey, classified by Smolcic et al. (2008) according to their optical colours and observed with Chandra. A similarly selected control sample of AGN is also used for comparison. We review some X-ray based classification criteria and check how they affect the sample composition. The efficiency of the classification scheme devised by Smolcic et al. (2008) is such that ~30% of composite/misclassified objects are expected because of the higher X-ray brightness of AGN with respect to galaxies. The latter fraction is actually 50% in the X-ray detected sources, while it is expected to be muc...

  10. [Productive restructuring and the reallocation of work and employment: a survey of the "new" forms of social inequality].

    Science.gov (United States)

    Marques, Ana Paula Pereira

    2013-06-01

    The scope of this paper is to question the inevitability of the processes of segmentation and increased precariousness of the relations of labor and employment, which are responsible for the introduction of "new" forms of social inequality that underpin the current model of development of economies and societies. It seeks to criticize the limits of global financial and economic logic, which constitute a "new spirit of capitalism," namely a kind of reverence for the natural order of things. It is therefore necessary to conduct an analytical survey of the ongoing changes in the labor market, accompanied by epistemological vigilance which makes it possible to see neoliberal (di)visions and dominant techno-deterministic theses in context. The enunciation of scenarios on the future of work will conclude this survey and will make it possible to draw attention to both the historical and temporal constraints and to the urgent need to unveil what is ideological and political in the prevailing logic of rationalization and processes to reinstate work and employment as a "central social experience" in contemporary times.

  11. The James Clerk Maxwell Telescope Legacy Survey of Nearby Star-forming Regions in the Gould Belt

    CERN Document Server

    Ward-Thompson, D; Hatchell, J; Hogerheijde, M R; Bastien, P; Basu, S; Bonnell, I; Bowey, J; Brunt, C; Buckle, J; Butner, H; Cavanagh, B; Chrysostomou, A; Curtis, E; Davis, C J; Dent, W R F; van Dishoeck, E; Edmunds, M G; Fich, M; Fiege, J; Fissel, L; Friberg, P; Friesen, R; Frieswijk, W; Fuller, G A; Gosling, A; Graves, S; Greaves, J S; Helmich, F; Hills, R E; Holland, W S; Houde, M; Jayawardhana, R; Johnstone, D; Joncas, G; Kirk, H; Kirk, J M; Knee, L B G; Matthews, B; Matthews, H; Matzner, C; Moriarty-Schieven, G H; Naylor, D; Nutter, D; Padman, R; Plume, R; Rawlings, J M C; Redman, R O; Reid, M; Richer, J S; Shipman, R; Simpson, R J; Spaans, M; Stamatellos, D; Tsanis, Y; Viti, S; Weferling, B; White, G J; Whitworth, A P; Wouterloot, J; Yates, J; Zhu, M

    2007-01-01

    This paper describes a James Clerk Maxwell Telescope (JCMT) legacy survey that has been awarded roughly 500 hrs of observing time to be carried out from 2007 to 2009. In this survey we will map with SCUBA-2 (Submillimetre Common User Bolometer Array 2) almost all of the well-known low-mass and intermediate-mass star-forming regions within 0.5 kpc that are accessible from the JCMT. Most of these locations are associated with the Gould Belt. From these observations we will produce a flux-limited snapshot of star formation near the Sun, providing a legacy of images, as well as point-source and extended-source catalogues, over almost 700 square degrees of sky. The resulting images will yield the first catalogue of prestellar and protostellar sources selected by submillimetre continuum emission, and should increase the number of known sources by more than an order of magnitude. We will also obtain CO maps with the array receiver HARP (Heterodyne Array Receiver Programme), in three CO isotopologues, of a large typi...

  12. The Atacama Cosmology Telescope: Dusty Star-Forming Galaxies and Active Galactic Nuclei in the Southern Survey

    Science.gov (United States)

    Marsden, Danica; Gralla, Megan; Marriage, Tobias A.; Switzer, Eric R.; Partridge, Bruce; Massardi, Marcella; Morales, Gustavo; Addison, Graeme; Bond, J. Richard; Crichton, Devin; hide

    2014-01-01

    We present a catalogue of 191 extragalactic sources detected by the Atacama Cosmology Telescope (ACT) at 148 and/or 218 GHz in the 2008 Southern survey. Flux densities span 14 - 1700 mJy, and we use source spectral indices derived using ACT-only data to divide our sources into two subpopulations: 167 radio galaxies powered by central active galactic nuclei (AGN) and 24 dusty star-forming galaxies (DSFGs). We cross-identify 97 per cent of our sources (166 of the AGN and 19 of the DSFGs) with those in currently available catalogues. When combined with flux densities from the Australia Telescope 20 GHz survey and follow-up observations with the Australia Telescope Compact Array, the synchrotron-dominated population is seen to exhibit a steepening of the slope of the spectral energy distribution from 20 to 148 GHz, with the trend continuing to 218 GHz. The ACT dust-dominated source population has a median spectral index, alpha(sub 148-218), of 3.7 +0.62/-0.86), and includes both local galaxies and sources with redshift around 6. Dusty sources with no counterpart in existing catalogues likely belong to a recently discovered subpopulation of DSFGs lensed by foreground galaxies or galaxy groups.

  13. The Atacama Cosmology Telescope: Dusty Star-Forming Galaxies and Active Galactic Nuclei in the Southern Survey

    Science.gov (United States)

    Marsden, Danica; Gralla, Megan; Marriage, Tobias A.; Switzer, Eric R.; Partridge, Bruce; Massardi, Marcella; Morales, Gustavo; Addison, Graeme; Bond, J. Richard; Crighton, Devin; Das, Sudeep; Devlin, Mark; Dunner, Rolando; Hajian, Amir; Hilton, Matt; Hincks, Adam; Hughes, John P.; Irwin, Kent; Kosowsky, Arthur; Menanteau, Felipe; Moodley, Kavilan; Niemack, Michael; Page, Lyman; Reese, Erik D.; Schmitt, Benjamin; Sehgal, Neelima; Sievers, Johnathan; Staggs, Suzanne; Swetz, Daniel; Thornton, Robert; Wollack, Edward

    2014-01-01

    We present a catalogue of 191 extragalactic sources detected by the Atacama Cosmology Telescope (ACT) at 148 and/or 218 GHz in the 2008 Southern survey. Flux densities span 14 -1700 mJy, and we use source spectral indices derived using ACT-only data to divide our sources into two subpopulations: 167 radio galaxies powered by central active galactic nuclei (AGN) and 24 dusty star-forming galaxies (DSFGs). We cross-identify 97 per cent of our sources (166 of the AGN and 19 of the DSFGs) with those in currently available catalogues. When combined with flux densities from the Australia Telescope 20 GHz survey and follow-up observations with the Australia Telescope Compact Array, the synchrotron-dominated population is seen to exhibit a steepening of the slope of the spectral energy distribution from 20 to 148 GHz, with the trend continuing to 218 GHz. The ACT dust-dominated source population has a median spectral index, A(sub 148-218), of 3.7 (+0.62 or -0.86), and includes both local galaxies and sources with redshift around 6. Dusty sources with no counterpart in existing catalogues likely belong to a recently discovered subpopulation of DSFGs lensed by foreground galaxies or galaxy groups.

  14. The IRX-beta relation on sub-galactic scales in star-forming galaxies of the Herschel Reference Survey

    CERN Document Server

    Boquien, M; Boselli, A; Baes, M; Bendo, G J; Ciesla, L; Cooray, A; Cortese, L; Eales, S; Gavazzi, G; Gomez, H L; Lebouteiller, V; Pappalardo, C; Pohlen, M; Smith, M W L; Spinoglio, L

    2012-01-01

    UV and optical surveys are essential to gain insight into the processes driving galaxy formation and evolution. The rest-frame UV emission is key to measure the cosmic SFR. However, UV light is strongly reddened by dust. In starburst galaxies, the UV colour and the attenuation are linked, allowing to correct for dust extinction. Unfortunately, evidence has been accumulating that the relation between UV colour and attenuation is different for normal star-forming galaxies when compared to starburst galaxies. It is still not understood why star-forming galaxies deviate from the UV colour-attenuation relation of starburst galaxies. Previous work and models hint that the role of the shape of the attenuation curve and the age of stellar populations have an important role. In this paper we aim at understanding the fundamental reasons to explain this deviation. We have used the CIGALE SED fitting code to model the far UV to the far IR emission of a set of 7 reasonably face-on spiral galaxies from the HRS. We have exp...

  15. Psychometric Properties of the Brazilian 12-Item Short-Form Health Survey Version 2 (SF-12v2

    Directory of Open Access Journals (Sweden)

    Bruno Figueiredo Damásio

    2015-04-01

    Full Text Available The 12-Item Short-Form Health Survey, in its initial (SF-12 and revised form (SF-12v2 is a widely used measure to evaluate health-related quality of life (HRQoL. The present study evaluates the factor structure and reliability of the Brazilian version of the SF-12v2. Participants were 627 subjects (74.1% women, aged from 18 to 88 years (M = 38.6; SD = 13.16, from 17 Brazilian states. Confirmatory factor analyses suggested two pairs of error terms to be highly correlated (3a-3b; and 4a-4b. A qualitative inspection showed an overlap of content among these items. The respecified model presented adequate fit indices. Convergent validity was also tested with measures of health-related self-care, subjective happiness, life satisfaction, depression and self-efficacy. Expected correlations were found between the SF-12v2 and these measures. Results showed initial evidence in favor of using the SF-12v2 as a measure of physical and mental health in the Brazilian context.

  16. Female Genital Mutilation in Sierra Leone: Forms, Reliability of Reported Status, and Accuracy of Related Demographic and Health Survey Questions

    Directory of Open Access Journals (Sweden)

    Owolabi Bjälkander

    2013-01-01

    Full Text Available Objective. To determine forms of female genital mutilation (FGM, assess consistency between self-reported and observed FGM status, and assess the accuracy of Demographic and Health Surveys (DHS FGM questions in Sierra Leone. Methods. This cross-sectional study, conducted between October 2010 and April 2012, enrolled 558 females aged 12–47 from eleven antenatal clinics in northeast Sierra Leone. Data on demography, FGM status, and self-reported anatomical descriptions were collected. Genital inspection confirmed the occurrence and extent of cutting. Results. All participants reported FGM status; 4 refused genital inspection. Using the WHO classification of FGM, 31.7% had type Ib; 64.1% type IIb; and 4.2% type IIc. There was a high level of agreement between reported and observed FGM prevalence (81.2% and 81.4%, resp.. There was no correlation between DHS FGM responses and anatomic extent of cutting, as 2.7% reported pricking; 87.1% flesh removal; and 1.1% that genitalia was sewn closed. Conclusion. Types I and II are the main forms of FGM, with labia majora alterations in almost 5% of cases. Self-reports on FGM status could serve as a proxy measurement for FGM prevalence but not for FGM type. The DHS FGM questions are inaccurate for determining cutting extent.

  17. Nearby supernova host galaxies from the CALIFA Survey: I. Sample, data analysis, and correlation to star-forming regions

    CERN Document Server

    Galbany, L; Mourão, A M; Rodrigues, M; Flores, H; García-Benito, R; Mast, D; Mendoza, M A; Sánchez, S F; Badenes, C; Barrera-Ballesteros, J; Bland-Hawthorn, J; Falcón-Barroso, J; García-Lorenzo, B; Gomes, J M; Delgado, R M González; Kehrig, C; Lyubenova, M; López-Sánchez, A R; de Lorenzo-Cáceres, A; Marino, R A; Meidt, S; Mollá, M; Papaderos, P; Pérez-Torres, M A; Rosales-Ortega, F F; van de Ven, G

    2014-01-01

    [Abridged] We use optical IFS of nearby SN host galaxies provided by the CALIFA Survey with the goal of finding correlations in the environmental parameters at the location of different SN types. We recover the sequence in association of different SN types to the star-forming regions by using several indicators of the ongoing and recent SF related to both the ionized gas and the stellar populations. While the total ongoing SF is on average the same for the three SN types, SNe Ibc/IIb tend to happen closer to star-forming regions and occur in higher SF density locations compared to SNe II and SNe~Ia, the latter showing the weakest correlation. SNe~Ia host galaxies have on average masses that are $\\sim$0.3-0.8~dex higher than CC SNe hosts due to a larger fraction of old stellar populations in the SNe~Ia hosts. Using the recent SN~Ia delay-time distribution and the SFHs of the galaxies, we show that the SN~Ia hosts in our sample should presently produce a factor 2 more SNe~Ia than the CC~SN hosts. Since both typ...

  18. The KMOS Deep Survey (KDS) - I. Dynamical measurements of typical star-forming galaxies at z ≃ 3.5

    Science.gov (United States)

    Turner, O. J.; Cirasuolo, M.; Harrison, C. M.; McLure, R. J.; Dunlop, J. S.; Swinbank, A. M.; Johnson, H. L.; Sobral, D.; Matthee, J.; Sharples, R. M.

    2017-10-01

    We present dynamical measurements from the KMOS (K-band multi-object spectrograph) Deep Survey (KDS), which comprises 77 typical star-forming galaxies at z ≃ 3.5 in the mass range 9.0 mean velocity dispersion of the galaxies in our sample is σ _int = 70.8^{+3.3}_{-3.1} km s^{-1}, revealing that the increasing average σint with increasing redshift, reported for z ≲ 2, continues out to z ≃ 3.5. Only 36 ± 8 per cent of our galaxies are rotation-dominated (VC/σint > 1), with the sample average VC/σint value much smaller than at lower redshift. After carefully selecting comparable star-forming samples at multiple epochs, we find that the rotation-dominated fraction evolves with redshift with a z-0.2 dependence. The rotation-dominated KDS galaxies show no clear offset from the local rotation velocity-stellar mass (i.e. VC-M⋆) relation, although a smaller fraction of the galaxies are on the relation due to the increase in the dispersion-dominated fraction. These observations are consistent with a simple equilibrium model picture, in which random motions are boosted in high-redshift galaxies by a combination of the increasing gas fractions, accretion efficiency, specific star formation rate and stellar feedback and which may provide significant pressure support against gravity on the galactic disc scale.

  19. The Star Formation in Radio Survey: GBT 33 GHz Observations of Nearby Galaxy Nuclei and Extranuclear Star-Forming Regions

    CERN Document Server

    Murphy, E J; Mason, B S; Condon, J J; Schinnerer, E; Aniano, G; Armus, L; Helou, G; Turner, J L; Jarrett, T H

    2012-01-01

    We present 33\\,GHz photometry of 103 galaxy nuclei and extranuclear star-forming complexes taken with the Green Bank Telescope (GBT) as part of the Star Formation in Radio Survey (SFRS). Among the sources without evidence for an AGN, and also having lower frequency radio data, we find a median thermal fraction at 33GHz of ~76% with a dispersion of ~24%. For all sources resolved on scales 90%. This suggests that the rest-frame 33GHz emission provides a sensitive measure of the ionizing photon rate from young star-forming regions, thus making it a robust star formation rate indicator. Taking the 33GHz star formation rates as a reference, we investigate other empirical calibrations relying on different combinations of warm 24\\mu m dust, total infrared (IR; 8-1000\\mu m), H\\alpha\\ line, and far-UV continuum emission. The recipes derived here generally agree with others found in the literature, albeit with a large dispersion that most likely stems from a combination of effects. Comparing the 33GHz to total IR flux ...

  20. An infrared-submillimeter study of star-forming regions selected by the ISOSS 170um survey

    CERN Document Server

    Hennemann, M; Krause, O; Lemke, D

    2008-01-01

    Using the ISOPHOT Serendipity Survey (ISOSS) at 170um a sample of galactic star-forming regions exhibiting very cold dust temperatures ( 100 M_sun) has been established. We characterise the star-forming content of five regions that were selected as potential sites for early stage high-mass star formation using SCUBA (JCMT) and Spitzer observations. In every region we identify one to four submillimeter clumps with projected sizes between 0.1 and 0.4 pc. The dust temperatures range from 11.6 to 21.3 K and the estimated clump masses are 2 to 166 M_sun. Towards the majority of submillimeter peaks we find point sources in the near- to mid-infrared. Most are interpreted as low-mass young stellar objects but we also detect very red sources. They probably represent very young and deeply embedded protostars that continue to accrete clump material and may reach higher masses. Several candidate intermediate-mass proto- or pre-main-sequence stars embedded in the clumps are identified. A subset of four clumps may be massi...

  1. TADPOL: A 1.3 mm Survey of Dust Polarization in Star-forming Cores and Regions

    CERN Document Server

    Hull, Charles L H; Kwon, Woojin; Bower, Geoffrey C; Carpenter, John M; Crutcher, Richard M; Fiege, Jason D; Franzmann, Erica; Hakobian, Nicholas S; Heiles, Carl; Houde, Martin; Hughes, A Meredith; Lamb, James W; Looney, Leslie W; Marrone, Daniel P; Matthews, Brenda C; Pillai, Thushara; Pound, Marc W; Rahman, Nurur; Sandell, Göran; Stephens, Ian W; Tobin, John J; Vaillancourt, John E; Volgenau, N H; Wright, Melvyn C H

    2013-01-01

    We present results of 1.3 mm dust polarization observations toward 29 star-forming cores and 8 high-mass star-forming regions, mapped with ~2.5'' resolution at CARMA as part of the TADPOL survey. We discuss three main findings in this work: (1) A subset of the sources have consistent magnetic field orientations between the large scales measured by single-dish submillimeter telescopes (with ~20'' resolution) and the small scales measured by CARMA. Those same sources also tend to have higher fractional polarizations than the sources with inconsistent large-to-small-scale fields, possibly because there is less twisting of the B-fields to reduce the polarization fraction. This suggests that in at least some sources, the B-fields play a role in regulating the infall of material over many orders of magnitude, all the way down to ~1000AU protostellar envelope scales. (2) Even in the sources with consistent large-to-small-scale field orientations, the magnetic fields in the cores are misaligned with outflows from the...

  2. Initial Results of a Far-Ultraviolet Spectroscopic Survey of Nearby Star-forming Galaxies with the Cosmic Origins Spectrograph

    Science.gov (United States)

    Redwine, Keith; McCandliss, Stephan R.; Wofford, Aida; Leitherer, Claus; Heckman, Timothy M.; France, Kevin; Fleming, Brian

    2017-01-01

    We present initial results for the HST Cycle 22 proposal 13761. We proposed to observe 75 target star-forming galaxies at a redshift 0.02 COS, spanning a bandpass of 1100 < λ < 2400 angstroms, and have thus far observed 34 of them. The main thrust of this project is to provide a previously unavailable survey of star-forming galaxies in this redshift range, allowing investigation into the factors that determine the Lyman-alpha emission at these low redshifts. We have begun a statistical analysis of the relationship between Lyman-alpha emission and the morphologies of the galaxies, such as absorption line strengths of other species, including various ionization states of oxygen, silicon, and other species to probe intrinsic properties of the emitting galaxy, such as metallicity, the gas-to-dust ratio, and local velocity fields. We have acquired a very rich dataset, with enough samples to try to answer a variety of open questions regarding the far-ultraviolet spectra of bright Lyman-alpha emitters. This work is supported by a NASA Grant HST-GO-13761 to the Johns Hopkins University.

  3. Patient experience and satisfaction with inpatient service: development of short form survey instrument measuring the core aspect of inpatient experience.

    Directory of Open Access Journals (Sweden)

    Eliza L Y Wong

    Full Text Available Patient experience reflects quality of care from the patients' perspective; therefore, patients' experiences are important data in the evaluation of the quality of health services. The development of an abbreviated, reliable and valid instrument for measuring inpatients' experience would reflect the key aspect of inpatient care from patients' perspective as well as facilitate quality improvement by cultivating patient engagement and allow the trends in patient satisfaction and experience to be measured regularly. The study developed a short-form inpatient instrument and tested its ability to capture a core set of inpatients' experiences. The Hong Kong Inpatient Experience Questionnaire (HKIEQ was established in 2010; it is an adaptation of the General Inpatient Questionnaire of the Care Quality Commission created by the Picker Institute in United Kingdom. This study used a consensus conference and a cross-sectional validation survey to create and validate a short-form of the Hong Kong Inpatient Experience Questionnaire (SF-HKIEQ. The short-form, the SF-HKIEQ, consisted of 18 items derived from the HKIEQ. The 18 items mainly covered relational aspects of care under four dimensions of the patient's journey: hospital staff, patient care and treatment, information on leaving the hospital, and overall impression. The SF-HKIEQ had a high degree of face validity, construct validity and internal reliability. The validated SF-HKIEQ reflects the relevant core aspects of inpatients' experience in a hospital setting. It provides a quick reference tool for quality improvement purposes and a platform that allows both healthcare staff and patients to monitor the quality of hospital care over time.

  4. Comparability of the Vineland Social Maturity Scale and the Vineland Adaptive Behavior Scale--survey form with infants evaluated for developmental delay.

    Science.gov (United States)

    Raggio, D J; Massingale, T W

    1990-10-01

    The Vineland Social Maturity Scale and its revision, the Vineland Adaptive Behavior Scale-Survey Form, were evaluated with infants referred for suspected developmental delay. Since the latter is being used more often by psychologists in evaluation and placement of children in the age group of birth to two years, comparative studies must ensure appropriate placement of children observed to have developmental delays. The present study indicated significantly higher over-all adaptive functioning on the Vineland Adaptive Behavior Scale-Survey Form for 33 black and 11 white infants of mean age 12 mo. than on the original Vineland scales. Substituting the Survey Form for the original Vineland scales when evaluating developmentally delayed infants is questionable. These results are also noteworthy in that children whose Vineland Social Maturity scaled scores make them eligible for special services would be excluded if the revised form were used in the evaluation process.

  5. FROM “MODELS” TO “REALITY”, AND RETURN. SOME REFLECTIONS ON THE INTERACTION BETWEEN SURVEY AND INTERPRETATIVE METHODS FOR BUILT HERITAGE CONSERVATION

    Directory of Open Access Journals (Sweden)

    F. Ottoni

    2017-05-01

    Full Text Available It's well known that more and more accurate methodologies and automatic tools are now available in the field of geometric survey and image processing and they constitute a fundamental instrument for cultural heritage knowledge and preservation; on the other side, very smart and precise numerical models are continuously improved and used in order to simulate the mechanical behaviour of masonry structures: both instruments and technologies are important part of a global process of knowledge which is at the base of any conservation project of cultural heritage. Despite the high accuracy and automation level reached by both technologies and programs, the transfer of data between them is not an easy task and defining the most reliable way to translate and exchange information without data loosing is still an open issue. The goal of the present paper is to analyse the complex process of translation from the very precise (and sometimes redundant information obtainable by the modern survey methodologies for historic buildings (as laser scanner, into the very simplified (may be too much schemes used to understand their real structural behaviour, with the final aim to contribute to the discussion on reliable methods for cultural heritage knowledge improvement, through empiricism.

  6. SURVEY

    DEFF Research Database (Denmark)

    SURVEY er en udbredt metode og benyttes inden for bl.a. samfundsvidenskab, humaniora, psykologi og sundhedsforskning. Også uden for forskningsverdenen er der mange organisationer som f.eks. konsulentfirmaer og offentlige institutioner samt marketingsafdelinger i private virksomheder, der arbejder...... med surveys. Denne bog gennemgår alle surveyarbejdets faser og giver en praktisk indføring i: • design af undersøgelsen og udvælgelse af stikprøver, • formulering af spørgeskemaer samt indsamling og kodning af data, • metoder til at analysere resultaterne...

  7. TADPOL: A 1.3 mm SURVEY OF DUST POLARIZATION IN STAR-FORMING CORES AND REGIONS

    Energy Technology Data Exchange (ETDEWEB)

    Hull, Charles L. H.; Plambeck, Richard L.; Bower, Geoffrey C.; Heiles, Carl [Astronomy Department and Radio Astronomy Laboratory, University of California, Berkeley, CA 94720-3411 (United States); Kwon, Woojin [SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen (Netherlands); Carpenter, John M.; Lamb, James W.; Pillai, Thushara [Department of Astronomy, California Institute of Technology, 1200 E. California Blvd., MC 249-17, Pasadena, CA 91125 (United States); Crutcher, Richard M.; Hakobian, Nicholas S.; Looney, Leslie W. [Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W Green Street, Urbana, IL 61801 (United States); Fiege, Jason D.; Franzmann, Erica [Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB, R3T 2N2 (Canada); Houde, Martin [Department of Physics and Astronomy, University of Western Ontario, London, ON, N6A 3K7 (Canada); Hughes, A. Meredith [Van Vleck Observatory, Astronomy Department, Wesleyan University, 96 Foss Hill Drive, Middletown, CT 06459 (United States); Marrone, Daniel P. [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Matthews, Brenda C. [Department of Physics and Astronomy, University of Victoria, 3800 Finnerty Rd., Victoria, BC, V8P 5C2 (Canada); Pound, Marc W. [Astronomy Department and Laboratory for Millimeter-wave Astronomy, University of Maryland, College Park, MD 20742 (United States); Rahman, Nurur [Physics Department, University of Johannesburg, C1-Lab 140, P.O. Box 524, Auckland Park 2006 (South Africa); Sandell, Göran, E-mail: chat@astro.berkeley.edu [SOFIA Science Center, Universities Space Research Association, NASA Ames Research Center, Moffett Field, CA 94035 (United States); and others

    2014-07-01

    We present λ 1.3 mm Combined Array for Research in Millimeter-wave Astronomy observations of dust polarization toward 30 star-forming cores and eight star-forming regions from the TADPOL survey. We show maps of all sources, and compare the ∼2.''5 resolution TADPOL maps with ∼20'' resolution polarization maps from single-dish submillimeter telescopes. Here we do not attempt to interpret the detailed B-field morphology of each object. Rather, we use average B-field orientations to derive conclusions in a statistical sense from the ensemble of sources, bearing in mind that these average orientations can be quite uncertain. We discuss three main findings. (1) A subset of the sources have consistent magnetic field (B-field) orientations between large (∼20'') and small (∼2.''5) scales. Those same sources also tend to have higher fractional polarizations than the sources with inconsistent large-to-small-scale fields. We interpret this to mean that in at least some cases B-fields play a role in regulating the infall of material all the way down to the ∼1000 AU scales of protostellar envelopes. (2) Outflows appear to be randomly aligned with B-fields; although, in sources with low polarization fractions there is a hint that outflows are preferentially perpendicular to small-scale B-fields, which suggests that in these sources the fields have been wrapped up by envelope rotation. (3) Finally, even at ∼2.''5 resolution we see the so-called polarization hole effect, where the fractional polarization drops significantly near the total intensity peak. All data are publicly available in the electronic edition of this article.

  8. Family Background and Returns to Schooling in Spain.

    Science.gov (United States)

    San-Segundo, Maria F.; Valiente, Asuncion

    2003-01-01

    Examines the relationship between returns to education and family background using samples of male and female workers drawn from the Spanish Survey on Class Structure. Results for males show a positive relationship between parents' education (or occupation) and returns to schools. Returns for females are mixed: Least-squares estimates show…

  9. The bursting nature of star formation in compact star-forming galaxies from the Sloan Digital Sky Survey

    Science.gov (United States)

    Izotov, Y. I.; Guseva, N. G.; Fricke, K. J.; Henkel, C.

    2016-11-01

    We study integrated characteristics of ˜14 000 low-redshift (0 < z < 1) compact star-forming galaxies (SFGs) selected from the Data Release 12 of the Sloan Digital Sky Survey. It is found that emission of these galaxies is dominated by strong young bursts of star formation, implying that their luminosities experience rapid variations on a time-scale of a few Myr. Reducing integrated characteristics of these galaxies to zero burst age would result in a considerably tighter and almost linear relation between stellar mass and star formation rate (SFR). The same correction implies that the specific star formation rate (the ratio of SFR and stellar mass) is not dependent on the galaxy stellar mass. We conclude that the correction for rapid luminosity evolution must be taken into account in a similar way when comparing different samples of low- and high-redshift SFGs. If the bursting nature of star formation and young burst ages are characteristics of the galaxies selected at high redshifts, the age correction of observed SFRs derived from the Hβ emission line or UV continua would modify the derived SFR densities in the early universe.

  10. Star-Forming Galaxies at z=0.24 in the Subaru Deep Field and the Sloan Digital Sky Survey

    CERN Document Server

    Morioka, Taichi; Taniguchi, Yoshiaki; Shioya, Yasuhiro; Murayama, Takashi; Sasaki, Shunji S

    2008-01-01

    We make a search for Halpha emitting galaxies at z=0.24 in the Subaru Deep Field (SDF) using the archival data set obtained with the Subaru Telescope. We carefully select Halpha emitters in the narrowband filter NB816, using B, V, Rc, i', and z' broad-band colors. We obtain a sample of 258 emitting galaxies with observed equivalent widths of (Halpha+[NII]6548,6584) greater than 12 angstrom. We also analyze a sample of Halpha emitters taken from the Sloan Digital Sky Survey (SDSS) to constrain the luminous end of Halpha luminosity function. Using the same selection criteria as for the SDF, and after excluding AGNs, we obtain 317 Halpha emitting star-forming galaxies. Combining these two samples of Halpha emitters found in both SDF and SDSS, we derive a Halpha luminosity function with best-fit Schechter function parameters of alpha = -1.31^+0.17_-0.17, log phi^* = -2.46^+0.34_-0.40 Mpc^-3, log L^* = 41.99^+0.08_-0.07 ergs s^-1. An extinction-corrected Halpha luminosity density is 4.45^+2.96_-1.75 x 10^39 ergs s...

  11. The bursting nature of star formation in compact star-forming galaxies from the Sloan Digital Sky Survey

    CERN Document Server

    Izotov, Y I; Fricke, K J; Henkel, C

    2016-01-01

    We study integrated characteristics of ~14000 low-redshift (0forming galaxies (SFGs) selected from the Data Release 12 of the Sloan Digital Sky Survey. It is found that emission of these galaxies is dominated by strong young bursts of star formation, implying that their luminosities experience rapid variations on a time scale of a few Myr. Reducing integrated characteristics of these galaxies to zero burst age would result in a considerably tighter and almost linear relation between stellar mass and star formation rate (SFR). The same correction implies that the specific star formation rate (the ratio of SFR and stellar mass) is not dependent on the galaxy stellar mass. We conclude that the correction for rapid luminosity evolution must be taken into account in a similar way when comparing different samples of low- and high-redshift SFGs. If the bursting nature of star formation and young burst ages are characteristics of the galaxies selected at high redshifts, the age correction of ...

  12. Herschel protocluster survey: A search for dusty star-forming galaxies in protoclusters at z=2-3

    CERN Document Server

    Kato, Y; Smail, Ian; Swinbank, A M; Hatsukade, B; Umehata, H; Tanaka, I; Saito, T; Iono, D; Tamura, Y; Kohno, K; Erb, D K; Lehmer, B D; Geach, J E; Steidel, C C; Alexander, D M; Yamada, T; Hayashino, T

    2016-01-01

    We present a Herschel/SPIRE survey of three protoclusters at z=2-3 (2QZCluster, HS1700, SSA22). Based on the SPIRE colours (S350/S250 and S500/S350) of 250 $\\mu$m sources, we selected high redshift dusty star-forming galaxies potentially associated with the protoclusters. In the 2QZCluster field, we found a 4-sigma overdensity of six SPIRE sources around 4.5' (~2.2 Mpc) from a density peak of H$\\alpha$ emitters at z=2.2. In the HS1700 field, we found a 5-sigma overdensity of eight SPIRE sources around 2.1' (~1.0 Mpc) from a density peak of LBGs at z=2.3. We did not find any significant overdensities in SSA22 field, but we found three 500 $\\mu$m sources are concentrated 3' (~1.4 Mpc) east to the LAEs overdensity. If all the SPIRE sources in these three overdensities are associated with protoclusters, the inferred star-formation rate densities are 10$^3$-10$^4$ times higher than the average value at the same redshifts. This suggests that dusty star-formation activity could be very strongly enhanced in z~2-3 pro...

  13. Size evolution of star-forming galaxies with 2 Survey

    Science.gov (United States)

    Ribeiro, B.; Le Fèvre, O.; Tasca, L. A. M.; Lemaux, B. C.; Cassata, P.; Garilli, B.; Maccagni, D.; Zamorani, G.; Zucca, E.; Amorín, R.; Bardelli, S.; Fontana, A.; Giavalisco, M.; Hathi, N. P.; Koekemoer, A.; Pforr, J.; Tresse, L.; Dunlop, J.

    2016-08-01

    Context. The size of a galaxy encapsulates the signature of the different physical processes driving its evolution. The distribution of galaxy sizes in the Universe as a function of cosmic time is therefore a key to understand galaxy evolution. Aims: We aim to measure the average sizes and size distributions of galaxies as they are assembling before the peak in the comoving star formation rate density of the Universe to better understand the evolution of galaxies across cosmic time. Methods: We used a sample of ~1200 galaxies in the COSMOS and ECDFS fields with confirmed spectroscopic redshifts 2 ≤ zspec ≤ 4.5 in the VIMOS Ultra Deep Survey (VUDS), representative of star-forming galaxies with iAB ≤ 25. We first derived galaxy sizes by applying a classical parametric profile-fitting method using GALFIT. We then measured the total pixel area covered by a galaxy above a given surface brightness threshold, which overcomes the difficulty of measuring sizes of galaxies with irregular shapes. We then compared the results obtained for the equivalent circularized radius enclosing 100% of the measured galaxy light r100T ~2.2 to those obtained with the effective radius re,circ measured with GALFIT. Results: We find that the sizes of galaxies computed with our non-parametric approach span a wide range but remain roughly constant on average with a median value r100T ~2.2 kpc for galaxies with 2 Program 185.A-0791.

  14. A survey of the cold molecular gas in gravitationally lensed star-forming galaxies at z>2

    CERN Document Server

    Aravena, M; Bethermin, M; Bothwell, M; Chapman, S C; de Breuck, C; Furstenau, R M; Gónzalez-López, J; Greve, T R; Litke, K; Ma, J; Malkan, M; Marrone, D P; Murphy, E J; Stark, A; Strandet, M; Vieira, J D; Weiss, A; Welikala, N; Wong, G F; Collier, J D

    2016-01-01

    Using the Australia Telescope Compact Array (ATCA), we conducted a survey of CO J=1-0 and J=2-1 line emission towards strongly lensed high-redshift dusty star forming galaxies (DSFGs) previously discovered with the South Pole Telescope (SPT). Our sample comprises 17 sources that had CO-based spectroscopic redshifts obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) and the Atacama Pathfinder Experiment (APEX). We detect all sources with known redshifts in either CO J=1-0 or J=2-1. Twelve sources are detected in the 7-mm continuum. The derived CO luminosities imply gas masses in the range (0.5-11)x10^{10} M_sun and gas depletion timescales <200 Myr, using a CO to gas mass conversion factor alpha_CO=0.8 M_sun (K km/s pc^2)^{-1}. Combining the CO luminosities and dust masses, along with a fixed gas-to-dust ratio, we derive alpha_CO factors in the range 0.4-1.8, similar to what is found in other starbursting systems. We find small scatter in alpha_CO values within the sample, even though inh...

  15. The nature of the [CII] emission in dusty star-forming galaxies from the SPT-survey

    CERN Document Server

    Gullberg, Bitten; Vieira, Joaquin; Weiss, Axel; Aguirre, James; Aravena, Manuel; Béthermin, Matthieu; Bradford, C Matt; Bothwell, Matt; Carlstrom, John; Chapman, Scott; Fassnacht, Chris; Gonzalez, Anthony; Greve, Thomas; Hezavah, Yashar; Holtzapfel, William L; Husband, Kate; Ma, Jingzhe; Malkan, Matt; Marrone, Dan; Menten, Karl; Murphy, Eric; Reichardt, Chris; Spilker, Justin; Stark, Anthony; Strandet, Maria; Welikala, Niraj

    2015-01-01

    We present [CII] observations of 20 strongly lensed dusty star forming galaxies at 2.1 20 mJy) from the South Pole Telescope survey, with far-infrared (FIR) luminosities determined from extensive photometric data. The [CII] line is robustly detected in 17 sources, all but one being spectrally resolved. Eleven out of 20 sources observed in [CII] also have low-J CO detections from ATCA. A comparison with mid- and high-J CO lines from ALMA reveals consistent [CII] and CO velocity profiles, suggesting that there is little differential lensing between these species. The [CII], low-J CO and FIR data allow us to constrain the properties of the interstellar medium. We find [CII] to CO(1-0) luminosity ratios in the SPT sample of 5200 +- 1800, with significantly less scatter than in other samples. This line ratio can be best described by a medium of [CII] and CO emitting gas with a higher [CII] than CO excitation temperature, high CO optical depth tau_CO >> 1, and low to moderate [CII] optical depth tau_CII ~< 1. T...

  16. Return times of polynomials as meta-Fibonacci numbers

    OpenAIRE

    Emerson, Nathaniel D.

    2004-01-01

    We consider generalized closest return times of a complex polynomial of degree at least two. Most previous studies on this subject have focused on the properties of polynomials with particular return times, especially the Fibonacci numbers. We study the general form of these closest return times. The main result of this paper is that these closest return times are meta-Fibonacci numbers. This result applies to the return times of a principal nest of a polynomial. Furthermore, we show that an ...

  17. The Stages of Mailed Questionnaire Returning Behavior.

    Science.gov (United States)

    Lockhart, Daniel C.

    1984-01-01

    Six stages are hypothesized that define the behavior of returning mailed questionnaires: receiving the questionnaire, opening the mail, forming an overall impression, answering the questions, returning the questionnaire, and dealing with nonrespondents. The researcher must provide incentives at each stage if potential respondents are to complete a…

  18. 26 CFR 50.7 - Returns.

    Science.gov (United States)

    2010-04-01

    ...) REGULATIONS RELATING TO THE TAX IMPOSED WITH RESPECT TO CERTAIN HYDRAULIC MINING § 50.7 Returns. (a) Form of... works restraining debris from the mine; (2) The name and location of the mine; (3) The name and address... on which hydraulic mining operations began and ended during the taxable year for which the return...

  19. Returnable containers: an example of reverse logistics

    NARCIS (Netherlands)

    L.G. Kroon (Leo); G.M.C. Vrijens

    1996-01-01

    textabstractConsiders the application of returnable containers as an example of reverse logistics. A returnable container is a type of secondary packaging that can be used several times in the same form, in contrast with traditional cardboard boxes. For this equipment to be used, a system for the re

  20. 78 FR 58605 - Proposed Collection; Comment Request for Form 8453-EMP, Form 8453-F, Form 8453-FE, Form 8879-F...

    Science.gov (United States)

    2013-09-24

    ... Internal Revenue Service Proposed Collection; Comment Request for Form 8453-EMP, Form 8453-F, Form 8453-FE, Form 8879-F, and 8879-EMP. AGENCY: Internal Revenue Service (IRS), Treasury. ACTION: Notice and request...- file Return; Form 8453-EMP, Employment Tax Declaration for an IRS e- file Return; Form 8879-EMP, IRS...

  1. The construct validity of the Short Form-36 Health Survey for patients with nonspecific chronic neck pain.

    Science.gov (United States)

    de Vries, Grietje E; Jorritsma, Wim; Dijkstra, Pieter U; Geertzen, Jan H B; Reneman, Michiel F

    2015-06-01

    Self-reported disability related to neck pain can be measured using general health questionnaires. The validity of the Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36) in patients with nonspecific chronic neck pain (CNP) in a tertiary outpatient rehabilitation setting is unknown. This study investigates construct validity of the SF-36 in these patients using 16 a-priori formulated hypotheses. Ninety-one patients admitted for rehabilitation completed the SF-36 before the rehabilitation program. SF-36 domain scores of patients with CNP were compared with general population reference values and standardized differences were calculated. For both the SF-36 physical and the mental component summary (PCS and MCS), differences between primary and tertiary care setting, men and women, age groups, litigants and nonlitigants, patients with and without compensation, and with ≥3 versus≤2 concomitant complaints were analyzed using independent t-tests. Differences between PCS and MCS scores were analyzed using a paired t-test. Twelve hypotheses were not rejected and four were rejected. All SF-36 domain scores were significantly lower than the general population references values. The domain scores 'role physical', 'bodily pain', 'vitality', 'social functioning,' and 'role emotional' were relevantly (≥1 SD) lower. SF-36-PCS and SF-36-MCS scores were significantly lower in tertiary care. The SF-36-PCS score was significantly lower for patients with workers compensation and patients with at least three concomitant complaints. The SF-36-MCS score was significantly lower for the age group of at least 39 years. The SF-36 has good construct validity and can be used to measure self-reported general health in patients with nonspecific CNP in outpatient tertiary rehabilitation.

  2. Validity and reliability of the Short Form 36 Health Surveys (SF-36) among patients with spondyloarthritis in Singapore.

    Science.gov (United States)

    Kwan, Yu Heng; Fong, Warren Weng Seng; Lui, Nai Lee; Yong, Si Ting; Cheung, Yin Bun; Malhotra, Rahul; Østbye, Truls; Thumboo, Julian

    2016-12-01

    The Short Form 36 Health Survey (SF-36) is a popular health-related quality of life (HrQoL) tool. However, few studies have assessed its psychometric properties in patients with spondyloarthritis (SpA). We therefore aimed to assess the reliability and validity of the SF-36 in patients with SpA in Singapore. Cross-sectional data from a registry of 196 SpA patients recruited from a dedicated tertiary referral clinic in Singapore from 2011 to 2014 was used. Analyses were guided by the COnsensus-based Standards for the selection of health Measurement INstruments framework. Internal consistency reliability was assessed using Cronbach's alpha. Construct validity was assessed through 33 a priori hypotheses by correlations of the eight subscales and two summary scores of SF-36 with other health outcomes. Known-group construct validity was assessed by comparison of the means of the subscales and summary scores of the SF-36 of SpA patients and the general population of Singapore using student's t tests. Among 196 patients (155 males (79.0 %), median (range) age: 36 (17-70), 166 Chinese (84.6 %)), SF-36 scales showed high internal consistency ranging from 0.88 to 0.90. Convergent construct validity was supported as shown by fulfillment of all hypotheses. Divergent construct validity was supported, as SF-36 MCS was not associated with PGA, pain and HAQ. Known-group construct validity showed SpA patients had lower scores of 3.8-12.5 when compared to the general population at p < 0.001. This study supports the SF-36 as a valid and reliable measure of HrQoL for use in patients with SpA at a single time point.

  3. Quality of life assessed with the medical outcomes study short form 36-item health survey of patients on renal replacement therapy: A systematic review and meta-analysis

    NARCIS (Netherlands)

    Y.S. Liem (Ylian Serina); J.L. Bosch (Johanna); L.R. Arends (Lidia); M.H. Heijenbrok-Kal (Majanka); M.G.M. Hunink (Myriam)

    2007-01-01

    textabstractObjectives: The Medical Outcomes Study Short Form 36-Item Health Survey (SF-36) is the most widely used generic instrument to estimate quality of life of patients on renal replacement therapy. Purpose of this study was to summarize and compare the published literature on quality of life

  4. Quality of life assessed with the medical outcomes study short form 36-item health survey of patients on renal replacement therapy: A systematic review and meta-analysis

    NARCIS (Netherlands)

    Y.S. Liem (Ylian Serina); J.L. Bosch (Johanna); L.R. Arends (Lidia); M.H. Heijenbrok-Kal (Majanka); M.G.M. Hunink (Myriam)

    2007-01-01

    textabstractObjectives: The Medical Outcomes Study Short Form 36-Item Health Survey (SF-36) is the most widely used generic instrument to estimate quality of life of patients on renal replacement therapy. Purpose of this study was to summarize and compare the published literature on quality of

  5. Predictable return distributions

    DEFF Research Database (Denmark)

    Pedersen, Thomas Quistgaard

    This paper provides detailed insights into predictability of the entire stock and bond return distribution through the use of quantile regression. This allows us to examine speci…c parts of the return distribution such as the tails or the center, and for a suf…ciently …ne grid of quantiles we can...... are predictable as a function of economic state variables. The results are, however, very different for stocks and bonds. The state variables primarily predict only location shifts in the stock return distribution, while they also predict changes in higher-order moments in the bond return distribution. Out...... trace out the entire distribution. A univariate quantile regression model is used to examine stock and bond return distributions individually, while a multivariate model is used to capture their joint distribution. An empirical analysis on US data shows that certain parts of the return distributions...

  6. College Risk and Return

    OpenAIRE

    Gonzalo Castex

    2011-01-01

    Attending college is thought of as a very profitable investment decision, as its estimated annualized return ranges from 8% to 13%. However, a large fraction of high school graduates do not enroll in college. I reconcile the observed high average returns to schooling with relatively low attendance rates when considering college as a risky investment decision. A high dropout risk has two important effects on the estimated average returns to college: selection bias and risk premium. In order to...

  7. Physical and chemical variations within the W3 star-forming region. II. The 345 GHz spectral line survey.

    Science.gov (United States)

    Helmich, F. P.; van Dishoeck, E. F.

    1997-08-01

    Results are presented of the 345 GHz spectral survey toward three sources in the W3 Giant Molecular Cloud: W3 IRS4, W3 IRS5 and W3(H_2O). Nearly 90% of the atmospheric window between 334 and 365 GHz has been scanned using the James Clerk Maxwell Telescope down to a noise level of ~80 mK per resolution element. These observations are complemented by a large amount of data in the 230 GHz atmospheric window. From this data set physical conditions and beam-averaged column densities are derived for more than 14 chemically different species (over 24 different isotopes). The physical parameters derived in Paper I (\\cite[Helmich et al. 1994]{ref36}) are confirmed by the analysis of the excitation of other species, although there is evidence that the silicon- and sulfur-bearing molecules exist in a somewhat denser and warmer environment. The densities are high, >= 10^6 cm^{-3}, in the three sources and the kinetic temperatures for the bulk of the gas range from 55 K for IRS4 to 220 K for W3(H_2O). The chemical differences between the three sources are very striking: silicon- and sulfur-bearing molecules such as SiO and SO_2 are prominent toward IRS5, whereas organic molecules like CH_3OH, CH_3OCH_3 and CH_3OCHO are at least an order of magnitude more abundant toward W3(H_2O). Vibrationally excited molecules are also detected toward this source. Only simple molecules are found toward IRS4. The data provide constraints on the amount of deuterium fractionation and the ionization fraction in the observed regions as well. These chemical characteristics are discussed in the context of an evolutionary sequence, in which IRS5 is the youngest, W3(H_2O) somewhat older and IRS4, although still enigmatic, the oldest. The James Clerk Maxwell Telescope is operated by the The Joint Astronomy Centre on behalf of the Particle Physics and Astronomy Research Council of the United Kingdom, the Netherlands Organisation for Scientific Research, and the National Research Council of Canada

  8. Classifying Returns as Extreme

    DEFF Research Database (Denmark)

    Christiansen, Charlotte

    2014-01-01

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

  9. Where Are "Women Returners" Returning From? Deconstructing Domestication in the Context of Lifelong Learning.

    Science.gov (United States)

    Clarke, Julia

    The question of where "women returners" to education are returning from was examined through an exploration of the life histories of 18 women in southern England. The study focused on the biographies of women who regarded themselves as primarily responsible for the care of others and yet whose aspirations involved some form of continuing…

  10. Star-forming galaxies with hot dust emission in the Sloan Digital Sky Survey discovered by the Wide-field Infrared Survey Explorer (WISE)

    CERN Document Server

    Izotov, Y I; Fricke, K J; Henkel, C

    2011-01-01

    We present the results of a search for Sloan Digital Sky Survey (SDSS) emission-line galaxies with very red 3.4mum - 4.6mum (W1-W2) colours in the Wide-field Infrared Survey Explorer (WISE) Preliminary Release Source Catalogue (PRSC) aiming to find objects with hot dust emission. For this purpose we considered a sample of ~16000 galaxies with strong emission lines selected out of a total of ~900000 SDSS spectra and identified them with the PRSC sources. We find that ~5000 sources out of the ~16000 SDSS galaxies are present in the PRSC, including ~1000 galaxies with sufficiently strong [OIII]4363 emission lines to permit reliable determinations of the oxygen abundance. No correlation of W1-W2 with metallicity is found. On the other hand, there is clear evidence for a redder W1-W2 index in galaxies with higher Hbeta luminosity and higher Hbeta equivalent width, implying that strong UV radiation from young starbursts efficiently heats interstellar dust to high temperatures. However, galaxies with very red colour...

  11. DESIGNING THE RETURN MIGRATION OF ROMANIAN STUDENTS

    Directory of Open Access Journals (Sweden)

    Magdalena VELCIU

    2017-05-01

    Full Text Available Romanian youth migration is an increasing phenomenon, due to subjective and objective factors as economical reasons, professional carrer and increasingly more international competition for talent. In these circumstances, the present article aims to evaluate determinant factors that contribute to the decision of Romanian graduates to return national labour market. We sustain that young Romanians consider carefully and hardly decide their professional future. A particular attention is given to their personal reasons and motivations as well as family and friends network. For designing returning factors we present the results of a questionnaire survey, asking young pupils and students about their future educational way and personal reasons underlying the decision to study in a foreign country and taking into consideration the returning decision. As far international student migration is seen as a first step to migration for work, our work desires to fight for returning home of Romanian well-educated graduates.

  12. Buddy enhanced return routability for authentication in mobile IPv6

    Science.gov (United States)

    Whitehead, Matthew E. N.; Medidi, Sirisha R.

    2004-08-01

    This paper proposes an improved form of authentication security for Mobile IPv6 called buddy enhanced return routability. Enhanced return routability builds on the foundation of return routability and extends that technique through the use of stochastic route selection for authentication messages. Theoretical work and simulation results show that enhanced return routability strengthens authentication security without adding restrictive overhead requirements or opening up new security holes.

  13. Comparison of the Vineland Social Maturity Scale, the Vineland Adaptive Behavior Scales--survey form, and the Bayley Scales of Infant Development with infants evaluated for developmental delay.

    Science.gov (United States)

    Raggio, D J; Massingale, T W

    1993-12-01

    The Vineland Adaptive Behavior Scales is an extensive revision of the Vineland Social Maturity Scale; however, research comparing the two scales with different populations and measures of intelligence is limited. The Vineland Adaptive Behavior Scales--Survey Form, the Vineland Social Maturity Scale, and the mental scale of the Bayley Scales of Infant Development were administered to 44 infants referred for evaluation of developmental delay. The differences between means were compared and shared variance examined. The Vineland Adaptive Behavior Scales--Survey Form scores were significantly higher than those of the Vineland Social Maturity Scale and the Bayley Mental Development Index. No significant differences were found between the means of the Vineland Social Maturity Scale and the Bayley Scales of Infant Development--Mental Development Index. Correlations were .59 between the Bayley Index and scores on the Vineland--Survey Form and .72 between the Bayley Index and the Vineland Social Maturity Scale. Between versions of the Vineland scale r = .39. Implications for diagnosis and educational classification are discussed.

  14. The medicinal use of cannabis and cannabinoids--an international cross-sectional survey on administration forms.

    Science.gov (United States)

    Hazekamp, Arno; Ware, Mark A; Muller-Vahl, Kirsten R; Abrams, Donald; Grotenhermen, Franjo

    2013-01-01

    Cannabinoids, including tetrahydrocannabinol and cannabidiol, are the most important active constituents of the cannabis plant. Over recent years, cannabinoid-based medicines (CBMs) have become increasingly available to patients in many countries, both as pharmaceutical products and as herbal cannabis (marijuana). While there seems to be a demand for multiple cannabinoid-based therapeutic products, specifically for symptomatic amelioration in chronic diseases, therapeutic effects of different CBMs have only been directly compared in a few clinical studies. The survey presented here was performed by the International Association for Cannabinoid Medicines (IACM), and is meant to contribute to the understanding of cannabinoid-based medicine by asking patients who used cannabis or cannabinoids detailed questions about their experiences with different methods of intake. The survey was completed by 953 participants from 31 countries, making this the largest international survey on a wide variety of users of cannabinoid-based medicine performed so far. In general, herbal non-pharmaceutical CBMs received higher appreciation scores by participants than pharmaceutical products containing cannabinoids. However, the number of patients who reported experience with pharmaceutical products was low, limiting conclusions on preferences. Nevertheless, the reported data may be useful for further development of safe and effective medications based on cannabis and single cannabinoids.

  15. Returns to Returning: Who Went Abroad and What Does it Matter?

    OpenAIRE

    Co, Catherine Y.; Yun, Myeong-Su; Gang, Ira N.

    1998-01-01

    We examine the labor market performance of return migrants using the Hungarian Household Panel Survey. Two distinct selection issues are considered in the estimation of the earnings equation. The result that there is a ?premium? to work experience abroad for women is robust across models we considered. This premium varies by former host country. For men, the return to working abroad is not generally significant, except for those Hungarians who worked in non-European OECD countries.

  16. Lidar 2009 - All Returns

    Data.gov (United States)

    Kansas Data Access and Support Center — LIDAR-derived binary (.las) files containing classified points of all returns. We have 3 classifications Unclassified, Ground, Low points. The average Ground Sample...

  17. Returning to Work

    Science.gov (United States)

    ... when work tasks can be upgraded to full duty. What can a person returning to work do? ... to-work program that includes transitional work for employees is an important component of a company's healthy ...

  18. African return migration: past, present, and future.

    Science.gov (United States)

    Gregory, J W; Piche, V

    1983-01-01

    The various forms of return migration in Africa in the twentieth century are first examined, and the factors affecting them are discussed. The authors then consider the value of the household, rather than the individual, as the unit of analysis. Return migration is also analyzed in terms of the linking role it plays between Africa's capitalist and non-capitalist countries. Finally, alternative future trends in the circulatory flow of African labor are considered.

  19. Does Exposure to Returning SEN Students Harm Peers’ Outcomes?

    DEFF Research Database (Denmark)

    Rangvid, Beatrice Schindler

    Returning SEN (special educational needs) students from segregated settings to regular class rooms may have spill-over effects on their peers. Using a combination of survey data and data from administrative registers from Denmark, I investigate whether becoming exposed to returning SEN students a...... themselves finds that while reading results are unaffected, returners experience large improvements in math achievement of roughly 65% of a standard deviation over a three year period. Intermediate and advanced math skills are more affected than basic skills....

  20. From HI to Stars: HI Depletion in Starbursts and Star-Forming Galaxies in the ALFALFA H-alpha Survey

    CERN Document Server

    Jaskot, A E; Salzer, J J; Van Sistine, A; Bell, E F; Haynes, M P

    2015-01-01

    HI in galaxies traces the fuel for future star formation and reveals the effects of feedback on neutral gas. Using a statistically uniform, HI-selected sample of 565 galaxies from the ALFALFA H-alpha survey, we explore HI properties as a function of star formation activity. ALFALFA H-alpha provides R-band and H-alpha imaging for a volume-limited subset of the 21-cm ALFALFA survey. We identify eight starbursts based on H-alpha equivalent width and six with enhanced star formation relative to the main sequence. Both starbursts and non-starbursts have similar HI to stellar mass ratios (MHI/M*), which suggests that feedback is not depleting the starbursts' HI. Consequently, the starbursts do have shorter HI depletion times (t_dep), implying more efficient HI-to-H2 conversion. While major mergers likely drive this enhanced efficiency in some starbursts, the lowest mass starbursts may experience periodic bursts, consistent with enhanced scatter in t_dep at low M*. Two starbursts appear to be pre-coalescence mergers...

  1. Land and property disputes impeding return and reintegration

    Directory of Open Access Journals (Sweden)

    Oumar Sylla

    2010-11-01

    Full Text Available A survey conducted by UNHCR in 2009 in IDP camps in North Kivu shows that access to land is the second factor after security which prevents people from returning to their zone of origin.

  2. Farm level survey of spore-forming bacteria on four dairy farms in the Waikato region of New Zealand.

    Science.gov (United States)

    Gupta, Tanushree B; Brightwell, Gale

    2017-03-03

    The aim of our study was to determine the occurrence and diversity of economically important spore-forming bacteria in New Zealand dairy farm systems. Farm dairy effluent (FDE) collected from Waikato dairy farms were tested for the presence of spore-forming bacteria, using a new culture-based methodology followed by genomic analysis. An enrichment step in which samples were inoculated in cooked meat glucose starch broth under anaerobic conditions, aided in the differential isolation of Bacillus and Clostridium species. Furthermore, the use of molecular methods such as ERIC genotyping, 16S rRNA gene sequence analysis identified different spore-forming bacteria present in FDE. C. sporogenes signature PCR gave further information on the phylogenetic relationship of the different Clostridium spp. isolated in this study. In total 19 Bacillus spp., 5 Paenibacillus spp. and 17 Clostridium spp. were isolated from farm dairy effluent. Sequence types similar to economically important food spoilage bacteria viz: C. butyricum, C. sporogenes and members of the Paenibacillus Genus were isolated from all four farms, whereas, sequence types similar to potential toxigenic, B. cereus, C. perfringens, C. butyricum, and C. botulinum were found on at least three of the farms. Sampling of farm dairy effluent provides a good indicator of farm level prevalence of bacterial load as it is used to irrigate dairy pasture in New Zealand. This study highlights the presence of various spore-forming bacteria in dairy waste water and indicates the implementation of good hygienic farm practices and dairy waste effluent management.

  3. Comet nucleus and asteroid sample return missions

    Science.gov (United States)

    1992-01-01

    Three Advanced Design Projects have been completed this academic year at Penn State. At the beginning of the fall semester the students were organized into eight groups and given their choice of either a comet nucleus or an asteroid sample return mission. Once a mission had been chosen, the students developed conceptual designs. These were evaluated at the end of the fall semester and combined into three separate mission plans, including a comet nucleus same return (CNSR), a single asteroid sample return (SASR), and a multiple asteroid sample return (MASR). To facilitate the work required for each mission, the class was reorganized in the spring semester by combining groups to form three mission teams. An integration team consisting of two members from each group was formed for each mission so that communication and information exchange would be easier among the groups. The types of projects designed by the students evolved from numerous discussions with Penn State faculty and mission planners at the Johnson Space Center Human/Robotic Spacecraft Office. Robotic sample return missions are widely considered valuable precursors to manned missions in that they can provide details about a site's environment and scientific value. For example, a sample return from an asteroid might reveal valuable resources that, once mined, could be utilized for propulsion. These missions are also more adaptable when considering the risk to humans visiting unknown and potentially dangerous locations, such as a comet nucleus.

  4. Proximity morality in medical school – medical students forming physician morality "on the job": Grounded theory analysis of a student survey

    Directory of Open Access Journals (Sweden)

    Sallin Karl

    2007-08-01

    Full Text Available Abstract Background The value of ethics education have been questioned. Therefore we did a student survey on attitudes about the teaching of ethics in Swedish medical schools. Methods Questionnaire survey on attitudes to ethics education with 409 Swedish medical students participating. We analyzed > 8000 words of open-ended responses and multiple-choice questions using classic grounded theory procedures. Results In this paper we suggest that medical students take a proximity morality stance towards their ethics education meaning that they want to form physician morality "on the job". This involves comprehensive ethics courses in which quality lectures provide "ethics grammar" and together with attitude exercises and vignette reflections nurture tutored group discussions. Goals of forming physician morality are to develop a professional identity, handling diversity of religious and existential worldviews, training students described as ethically naive, processing difficult clinical experiences, and desisting negative role modeling from physicians in clinical or teaching situations, some engaging in "ethics suppression" by controlling sensitive topic discussions and serving students politically correct attitudes. Conclusion We found that medical students have a proximity morality attitude towards ethics education. Rather than being taught ethics they want to form their own physician morality through tutored group discussions in comprehensive ethics courses.

  5. Proximity morality in medical school--medical students forming physician morality "on the job": grounded theory analysis of a student survey.

    Science.gov (United States)

    Thulesius, Hans O; Sallin, Karl; Lynoe, Niels; Löfmark, Rurik

    2007-08-06

    The value of ethics education have been questioned. Therefore we did a student survey on attitudes about the teaching of ethics in Swedish medical schools. Questionnaire survey on attitudes to ethics education with 409 Swedish medical students participating. We analyzed > 8000 words of open-ended responses and multiple-choice questions using classic grounded theory procedures. In this paper we suggest that medical students take a proximity morality stance towards their ethics education meaning that they want to form physician morality "on the job". This involves comprehensive ethics courses in which quality lectures provide "ethics grammar" and together with attitude exercises and vignette reflections nurture tutored group discussions. Goals of forming physician morality are to develop a professional identity, handling diversity of religious and existential worldviews, training students described as ethically naive, processing difficult clinical experiences, and desisting negative role modeling from physicians in clinical or teaching situations, some engaging in "ethics suppression" by controlling sensitive topic discussions and serving students politically correct attitudes. We found that medical students have a proximity morality attitude towards ethics education. Rather than being taught ethics they want to form their own physician morality through tutored group discussions in comprehensive ethics courses.

  6. The VIMOS Ultra Deep Survey: Lyman Alpha Emission and Stellar Populations of Star-Forming Galaxies at 2

    CERN Document Server

    Hathi, Nimish P

    2016-01-01

    The extensive ground-based spectroscopy campaign from the VIMOS Ultra-Deep Survey (VUDS), and the deep multi-wavelength photometry in three very well observed extragalactic fields (ECDFS, COSMOS, VVDS), allow us to investigate physical properties of a large sample (~4000 galaxies) of spectroscopically confirmed faint (i_{AB}20A) increases from ~10% at z~2 to ~40% at z~5-6, which is consistent with previous studies that employ higher Lyman alpha EW cut. This increase in the LAE fraction could be, in part, due to a decrease in the dust content of galaxies as redshift increases. When we compare best-fit SED estimated stellar parameters for LAEs and non-LAEs, we find that E(B-V) is smaller for LAEs at all redshifts and the difference in the median E(B-V) between LAEs and non-LAEs increases as redshift increases, from 0.05 at z~2 to 0.1 at z~3.5 to 0.2 at z~5-6. For the luminosities probed here (~L*), we find that star formation rates (SFRs) and stellar masses of galaxies, with and without Lyman alpha in emission,...

  7. A CO survey in planet-forming disks: characterizing the gas content in the epoch of planet formation

    CERN Document Server

    Hales, A S; Montesinos, B; Casassus, S; Dent, W F R; Dougados, C; Eiroa, C; Hughes, A M; Garay, G; Mardones, D; Ménard, F; Palau, Aina; Pérez, S; Phillips, N; Torrelles, J M; Wilner, D

    2014-01-01

    We carried out a 12CO(3-2) survey of 52 southern stars with a wide range of IR excesses (LIR/L*) using the single dish telescopes APEX and ASTE. The main aims were (1) to characterize the evolution of molecular gas in circumstellar disks using LIR/L* values as a proxy of disk dust evolution, and (2) to identify new gas-rich disk systems suitable for detailed study with ALMA. About 60% of the sample (31 systems) have LIR/L* > 0.01 typical of T-Tauri or Herbig AeBe stars, and the rest (21 systems) have LIR/L* 0.01. However, the spectra of only four of the newly detected systems appear free of contamination from background or foreground emission from molecular clouds. These include the early-type stars HD 104237 (A4/5V, 116 pc) and HD 98922 (A2 III, 507 pc, as determined in this work), where our observations reveal the presence of CO-rich circumstellar disks for the first time. Of the other detected sources, many could harbor gaseous circumstellar disks, but our data are inconclusive. For these two newly discov...

  8. The K20 survey. I. Disentangling old and dusty star-forming galaxies in the ERO population

    CERN Document Server

    Cimatti, A; Mignoli, M; Pozzetti, L; Renzini, A; Zamorani, G; Broadhurst, T J; Fontana, A; Saracco, P; Poli, F; Cristiani, S; D'Odorico, S; Giallongo, E; Gilmozzi, R; Menci, N

    2002-01-01

    We present the results of VLT optical spectroscopy of a complete sample of 78 EROs with R-Ks\\geq5 over a field of 52 arcmin^2. About 70% of the 45 EROs with Ks\\leq19.2 have been spectroscopically identified with old passively evolving and dusty star-forming galaxies at 0.7forming EROs we estimate a substantial dust extinction with E(B-V) \\gtsima 0.5. The star formation rates, corrected for the average reddening, sugges...

  9. Returning to the Forest

    DEFF Research Database (Denmark)

    Kristensen, Benedikte Møller

    This PhD thesis is about shamanism among the Duha in Mongolia. It is based on 22 months of fieldwork (1999 - 2012) among the Duha reindeer nomads in Northern Mongolia, and examines why the Duha return to their traditional livelihood as hunters and herders in the taiga has resulted in a turn to ward...

  10. Higher Education Endowments Return

    Science.gov (United States)

    Bahlmann, David; Walda, John D.; Sedlacek, Verne O.

    2012-01-01

    A new study of endowments by the National Association of College and University Business Officers (NACUBO) and the Commonfund Institute has brought good news to college and universities: While endowment returns dropped precipitously in fiscal year 2009 as a result of the financial crisis and accompanying slide in equity markets, they climbed to an…

  11. The 'successful' return

    DEFF Research Database (Denmark)

    Olwig, Karen Fog

    2012-01-01

    Research on female migrant caregivers has tended to focus upon the emotional and social problems they encounter working abroad, given women’s traditional role as caregivers for their own families. This article analyses how Caribbean women who have returned after a period abroad as domestic workers...

  12. Return to Play

    Science.gov (United States)

    Mangan, Marianne

    2013-01-01

    Call it physical activity, call it games, or call it play. Whatever its name, it's a place we all need to return to. In the physical education, recreation, and dance professions, we need to redesign programs to address the need for and want of play that is inherent in all of us.

  13. Returning to the Forest

    DEFF Research Database (Denmark)

    Kristensen, Benedikte Møller

    This PhD thesis is about shamanism among the Duha in Mongolia. It is based on 22 months of fieldwork (1999 - 2012) among the Duha reindeer nomads in Northern Mongolia, and examines why the Duha return to their traditional livelihood as hunters and herders in the taiga has resulted in a turn to wa...

  14. VizieR Online Data Catalog: W3 star-forming region 345 GHz survey (Helmich+ 1997)

    Science.gov (United States)

    Helmich, F. P.; van Dishoeck, E. F.

    1997-07-01

    Results are presented of the 345 GHz spectral survey toward three sources in the W 3 Giant Molecular Cloud: W 3 IRS4, W 3 IRS5 and W 3(H2O). Nearly 90% of the atmospheric window between 334 and 365GHz has been scanned using the James Clerk Maxwell Telescope (JCMT) down to a noise level of ~80mK per resolution element. These observations are complemented by a large amount of data in the 230GHz atmospheric window. From this data set physical conditions and beam-averaged column densities are derived for more than 14 chemically different species (over 24 different isotopes). The physical parameters derived in Paper I (Helmich et al., 1994A&A...283..626H) are confirmed by the analysis of the excitation of other species, although there is evidence that the silicon- and sulfur-bearing molecules exist in a somewhat denser and warmer environment. The densities are high, >=106cm-3, in the three sources and the kinetic temperatures for the bulk of the gas range from 55K for IRS4 to 220K for W 3(H2O). The chemical differences between the three sources are very striking: silicon- and sulfur-bearing molecules such as SiO and SO2 are prominent toward IRS5, whereas organic molecules like CH3OH, CH3OCH3 and CH3OCHO are at least an order of magnitude more abundant toward W 3(H2O). Vibrationally excited molecules are also detected toward this source. Only simple molecules are found toward IRS4. The data provide constraints on the amount of deuterium fractionation and the ionization fraction in the observed regions as well. These chemical characteristics are discussed in the context of an evolutionary sequence, in which IRS5 is the youngest, W 3(H2O) somewhat older and IRS4, although still enigmatic, the oldest. (6 data files).

  15. A CO survey in planet-forming disks: Characterizing the gas content in the epoch of planet formation

    Energy Technology Data Exchange (ETDEWEB)

    Hales, A. S.; De Gregorio-Monsalvo, I.; Dent, W. F. R.; Phillips, N. [Atacama Large Millimeter/Submillimeter Array, Joint ALMA Observatory, Alonso de Córdova 3107, Vitacura 763-0355 Santiago (Chile); Montesinos, B. [Department of Astrophysics, Centre for Astrobiology (CAB, CSIC-INTA), ESAC Campus, P.O. Box 78, E-28691 Villanueva de la Cañada, Madrid (Spain); Casassus, S.; Garay, G.; Mardones, D.; Pérez, S. [Departamento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago (Chile); Dougados, C.; Ménard, F. [UMI-FCA, CNRS/INSU, France (UMI 3386) (France); Eiroa, C. [Departamento de Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid (Spain); Hughes, A. M. [Department of Astronomy, University of California, Berkeley, CA 94720 (United States); Palau, Aina [Institut de Ciéncies de l' Espai (CSIC-IEEC), Campus UAB-Facultat de Ciéncies, Torre C5-parell 2, E-08193 Bellaterra, Catalunya (Spain); Torrelles, J. M. [Institut de Ciències de l' Espai (CSIC-IEEC) and Institut de Ciències del Cosmos (UB-IEEC), Martí i Franquès 1, E-08028 Barcelona (Spain); Wilner, D., E-mail: ahales@alma.cl [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States)

    2014-09-01

    We carried out a {sup 12}CO(3-2) survey of 52 southern stars with a wide range of IR excesses (L {sub IR}/L {sub *}) using the single-dish telescopes APEX and ASTE. The main aims were (1) to characterize the evolution of molecular gas in circumstellar disks using L {sub IR}/L {sub *} values as a proxy of disk dust evolution, and (2) to identify new gas-rich disk systems suitable for detailed study with ALMA. About 60% of the sample (31 systems) have L {sub IR}/L {sub *} > 0.01, typical of T Tauri or Herbig AeBe stars, and the rest (21 systems) have L {sub IR}/L {sub *} < 0.01, typical of debris disks. We detect CO(3-2) emission from 20 systems, and 18 (90%) of these have L {sub IR}/L {sub *} > 0.01. However, the spectra of only four of the newly detected systems appear free of contamination from background or foreground emission from molecular clouds. These include the early-type stars HD 104237 (A4/5V, 116 pc) and HD 98922 (A2 III, 507 pc, as determined in this work), where our observations reveal the presence of CO-rich circumstellar disks for the first time. Of the other detected sources, many could harbor gaseous circumstellar disks, but our data are inconclusive. For these two newly discovered gas-rich disks, we present radiative transfer models that simultaneously reproduce their spectral energy distributions and the {sup 12}CO(3-2) line profiles. For both of these systems, the data are fit well by geometrically flat disks, placing them in the small class of non-flaring disks with significant molecular gas reservoirs.

  16. Analysis of posttraumatic stress disorders in Polish soldiers who returned from stabilization mission in Iraq

    Directory of Open Access Journals (Sweden)

    Skotnicka, Justyna

    2013-12-01

    Full Text Available Aims. The aim of the survey was to establish whether PTSD is present among Polish soldiers returning from a one-year deployment to Iraq and an analysis of its individual symptoms. Methods. Sixty soldiers were examined, including 30 who returned from the Iraqi mission and 30 who remained in Poland. Five analysing devices were used: (IPSA, (STAI, (BDI, a PTSD questionnaire and a socio-demographical form. Results: A significant number of soldiers experienced a traumatic event during the mission in Iraq. Although the Iraq deployment did not change the level of depression and anxiety among the two groups of soldiers, disproportions were found in the range of anger level intensity, which was significantly higher among soldiers who returned from Iraq. Conclusion. Stabilisation mission and the experience of a traumatic event influenced the biological and psychological functioning patterns among soldiers who returned from Iraq. The manifestations of this were emotional and physiological reactions that the soldiers experienced (nightmares, excessive sweating, increased heartbeat rate, stressful reactions in situations similar to the traumatic occurrence and intensified responses to them. However, contrary to the assumptions, it was not concluded that soldiers who returned from Iraq are suffering from PTSD.

  17. Return migration and occupational change: the case of Pakistani migrants returned from the Middle East.

    Science.gov (United States)

    Arif, G M; Irfan, M

    1997-01-01

    This paper reports on the factors affecting occupational composition of Pakistani workers upon their return from Middle East employment locations as determined by using the 1986 ILO/ARTEP Survey of Return Migrant Households. Three issues related to post-migration occupation change of return migrants were explored: 1) the comparison of occupational composition in the pre-migration phase with the composition during migration; 2) the direction of occupational change; and 3) the factors affecting these changes after return. 44% of the total employed in the ILO sample changed their pre-migration occupations upon return from employment in production or service jobs to smallbusinessrelated employment; the highest level of occupational change was observed in nonirrigated areas. Occupational change was strongly related to migrants' duration of stay in the Middle East, their ages upon returning, and their level of educational attainment. Occupational mobility experienced by the returnees was mainly towards the business sectora direction approved by the Pakistan Government. The preference of the returnees to work independently might have enabled them to earn sufficient money to maintain their higher standard of living into the period following return migration. It is concluded that in order to achieve stability in the businesses established by the returnees, the Overseas Pakistanis' Foundation should provide services, including project-oriented training courses and loan plans, that will aid the returnees in managing their small businesses.

  18. SurveyWiz and factorWiz: JavaScript Web pages that make HTML forms for research on the Internet.

    Science.gov (United States)

    Birnbaum, M H

    2000-05-01

    SurveyWiz and factorWiz are Web pages that act as wizards to create HTML forms that enable one to collect data via the Web. SurveyWiz allows the user to enter survey questions or personality test items with a mixture of text boxes and scales of radio buttons. One can add demographic questions of age, sex, education, and nationality with the push of a button. FactorWiz creates the HTML for within-subjects, two-factor designs as large as 9 x 9, or higher order factorial designs up to 81 cells. The user enters levels of the row and column factors, which can be text, images, or other multimedia. FactorWiz generates the stimulus combinations, randomizes their order, and creates the page. In both programs HTML is displayed in a window, and the user copies it to a text editor to save it. When uploaded to a Web server and supported by a CGI script, the created Web pages allow data to be collected, coded, and saved on the server. These programs are intended to assist researchers and students in quickly creating studies that can be administered via the Web.

  19. The KMOS Redshift One Spectroscopic Survey (KROSS): Dynamical properties, gas and dark matter fractions of typical z~1 star-forming galaxies

    CERN Document Server

    Stott, John P; Johnson, Helen L; Tiley, Alfie; Magdis, Georgios; Bower, Richard; Bunker, Andrew J; Bureau, Martin; Harrison, Chris M; Jarvis, Matt J; Sharples, Ray; Smail, Ian; Sobral, David; Best, Philip; Cirasuolo, Michele

    2016-01-01

    The KMOS Redshift One Spectroscopic Survey (KROSS) is an ESO guaranteed time survey of 795 typical star-forming galaxies in the redshift range z=0.8-1.0 with the KMOS instrument on the VLT. In this paper we present resolved kinematics and star formation rates for 584 z~1 galaxies. This constitutes the largest near-infrared Integral Field Unit survey of galaxies at z~1 to date. We demonstrate the success of our selection criteria with 90% of our targets found to be Halpha emitters, of which 81% are spatially resolved. The fraction of the resolved KROSS sample with dynamics dominated by ordered rotation is found to be 83$\\pm$5%. However, when compared with local samples these are turbulent discs with high gas to baryonic mass fractions, ~35%, and the majority are consistent with being marginally unstable (Toomre Q~1). There is no strong correlation between galaxy averaged velocity dispersion and the total star formation rate, suggesting that feedback from star formation is not the origin of the elevated turbule...

  20. The very wide-field gzK galaxy survey - I. Details of the clustering properties of star-forming galaxies at z ˜ 2

    Science.gov (United States)

    Ishikawa, Shogo; Kashikawa, Nobunari; Toshikawa, Jun; Onoue, Masafusa

    2015-11-01

    We present the results of clustering analysis on z ˜ 2 star-forming galaxies. By combining our data with data from publicly available archives, we collect g-, zB/z- and K-band imaging data over 5.2 deg2, which represents the largest area BzK/gzK survey. We apply colour corrections to translate our filter set to those used in the original BzK selection for the gzK selection. Because of the wide survey area, we obtain a sample of 41 112 star-forming gzK galaxies at z ˜ 2 (sgzK galaxies) down to KAB error than that in previous studies. The large amount of data enables us to determine ACFs differentially depending on the luminosity of the subset of the data. The mean halo mass of faint sgzK galaxies (22.0 = (1.32^{+0.09}_{-0.12}) × 10^{12} h^{-1} M⊙, whereas bright sgzK galaxies (18.0 ≤ K ≤ 21.0) were found to reside in dark haloes with a mass of = (3.26^{+1.23}_{-1.02}) × 10^{13} h^{-1} M⊙.

  1. The very wide-field $gzK$ galaxy survey -- I. Details of the clustering properties of star-forming galaxies at $z \\sim 2$

    CERN Document Server

    Ishikawa, Shogo; Toshikawa, Jun; Onoue, Masafusa

    2016-01-01

    We present the results of clustering analysis on the $z \\sim 2$ star-forming galaxies. By combining our data with data from publicly available archives, we collect $g$-, $\\zb / z$-, and $K$-band imaging data over 5.2 deg$^{2}$, which represents the largest area BzK/gzK survey. We apply colour corrections to translate our filter-set to those used in the original BzK selection for the gzK selection. Because of the wide survey area, we obtain a sample of 41,112 star-forming gzK galaxies at $z \\sim 2$ (sgzKs) down to $\\KAB < 23.0$, and determine high-quality two-point angular correlation functions (ACFs). Our ACFs show an apparent excess from power-law behaviour at small angular scale $(\\theta \\la 0.01^{\\circ})$, which corresponds the virial radius of a dark halo at $z \\sim 2$ with a mass of $\\sim 10^{13} \\Msun$. We find that the correlation lengths are consistent with the previous estimates over all magnitude range; however, our results are evaluated with a smaller margin of error than that in previous studie...

  2. Stellar masses and star formation rates of lensed dusty star-forming galaxies from the SPT survey

    CERN Document Server

    Ma, Jingzhe; Spilker, J S; Strandet, M; Ashby, M L N; Aravena, M; Béthermin, M; Bothwell, M S; de Breuck, C; Brodwin, M; Chapman, S C; Fassnacht, C D; Greve, T R; Gullberg, B; Hezaveh, Y; Malkan, M; Marrone, D P; Saliwanchik, B R; Vieira, J D; Weiß, A; Welikala, N

    2015-01-01

    To understand cosmic mass assembly in the Universe at early epochs, we primarily rely on measurements of stellar mass and star formation rate of distant galaxies. In this paper, we present stellar masses and star formation rates of six high-redshift ($2.8\\leq z \\leq 5.7$) dusty, star-forming galaxies (DSFGs) that are strongly gravitationally lensed by foreground galaxies. These sources were first discovered by the South Pole Telescope (SPT) at millimeter wavelengths and all have spectroscopic redshifts and robust lens models derived from ALMA observations. We have conducted follow-up observations, obtaining multi-wavelength imaging data, using {\\it HST}, {\\it Spitzer}, {\\it Herschel} and the Atacama Pathfinder EXperiment (APEX). We use the high-resolution {\\it HST}/WFC3 images to disentangle the background source from the foreground lens in {\\it Spitzer}/IRAC data. The detections and upper limits provide important constraints on the spectral energy distributions (SEDs) for these DSFGs, yielding stellar masses...

  3. The Herschel-PEP survey: evidence for downsizing in the hosts of dusty star-forming systems

    CERN Document Server

    Magliocchetti, M; Rosario, D; Lutz, D; Aussel, H; Berta, S; Altieri, B; Andreani, P; Cepa, J; Castaneda, H; Cimatti, A; Elbaz, D; Genzel, R; Grazian, A; Gruppioni, C; Ilbert, O; Floc'h, E Le; Magnelli, B; Maiolino, R; Nordon, R; Poglitsch, A; Pozzi, F; Riguccini, L; Rodighiero, G; Sanchez-Portal, M; Santini, P; Schreiber, N M Forster; Sturm, E; Tacconi, L; Valtchanov, I

    2013-01-01

    By making use of Herschel-PEP observations of the COSMOS and Extended Groth Strip fields, we have estimated the dependence of the clustering properties of FIR-selected sources on their 100um fluxes. Our analysis shows a tendency for the clustering strength to decrease with limiting fluxes: r0(S100um >8 mJy)~4.3 Mpc and r0(S100um >5 mJy)~5.8 Mpc. These values convert into minimum halo masses Mmin~10^{11.6} Msun for sources brighter than 8 mJy and Mmin~10^{12.4} Msun for S100um > 5 mJy galaxies. We show such an increase of the clustering strength to be due to an intervening population of z~2 sources, which are very strongly clustered and whose relative contribution, equal to about 10% of the total counts at S100um > 2 mJy, rapidly decreases for brighter flux cuts. By removing such a contribution, we find that z ~100 Msun/yr). Our analysis shows that the same amount of (intense) star forming activity takes place in extremely different environments at the different cosmological epochs. For z<~1 the hosts of su...

  4. The COS-Halos Survey: Origins of the Highly Ionized Circumgalactic Medium of Star-Forming Galaxies

    CERN Document Server

    Werk, Jessica K; Cantalupo, Sebastiano; Fox, Andrew J; Oppenheimer, Benjamin; Tumlinson, Jason; Tripp, Todd M; Lehner, Nicolas; McQuinn, Matthew

    2016-01-01

    The total contribution of diffuse halo gas to the galaxy baryon budget strongly depends on its dominant ionization state. In this paper, we address the physical conditions in the highly-ionized circumgalactic medium (CGM) traced by OVI absorption lines observed in COS-Halos spectra. We analyze the observed ionic column densities, absorption-line widths and relative velocities, along with the ratios of NV/OVI for 39 fitted Voigt profile components of OVI. We compare these quantities with the predictions given by a wide range of ionization models. Photoionization models that include only extragalactic UV background radiation are ruled out; conservatively, the upper limits to NV/OVI and measurements of N$_{\\rm OVI}$ imply unphysically large path lengths $\\gtrsim$ 100 kpc. Furthermore, very broad OVI absorption (b $>$ 40 km/s) is a defining characteristic of the CGM of star-forming L$^{*}$ galaxies. We highlight two possible origins for the bulk of the observed OVI: (1) highly structured gas clouds photoionized p...

  5. Malaria outbreak among French army troops returning from the Ivory Coast.

    Science.gov (United States)

    Mayet, Aurélie; Lacassagne, David; Juzan, Nicolas; Chaudier, Bernard; Haus-Cheymol, Rachel; Berger, Franck; Romand, Olivier; Ollivier, Lénaick; Verret, Catherine; Deparis, Xavier; Spiegel, André

    2010-01-01

    In 2006, a French Army unit reported 39 malaria cases among service persons returning from Ivory Coast. Thirty, including three serious forms, occurred after the return to France. The risk of post-return malaria was higher than the risk in Ivory Coast. Half of the imported cases had stopped post-return chemoprophylaxis early. © 2010 International Society of Travel Medicine.

  6. Oral syringe use survey.

    Science.gov (United States)

    Baldwin, J N; Wedemeyer, H F

    1980-09-01

    Use of oral syringes at children's and ASHP-accredited residency hospitals in the United States was surveyed. Questionnaires were mailed to 131 hospitals; 117 (89.3%) were returned. Of the responding hospitals, 54.5% of children's hospitals and 67.1% of residency hospitals used oral syringes. There was no definite preference for a particular brand or type (glass vs. plastic) of syringe. Patients who often required liquid dosage forms, including pediatric and geriatric patients and patients with nasogastric tubes, were most frequently included in oral syringe distribution systems. Twenty-six of the 73 hospitals utilizing oral syringes used them for most unit dose liquids in all drug distribution systems. The remainder reported use for specific medications or circumstances. Expiration dating policies varied from 24 hours to one year to the manufacturer's expiration dating. The survey indicates widespread use of oral syringes and identifies a need for evaluation of medication stability in these devices.

  7. An HST Imaging Survey of Low-mass Stars in the Chamaeleon I Star-forming Region

    Science.gov (United States)

    Robberto, M.; Spina, L.; Da Rio, N.; Apai, D.; Pascucci, I.; Ricci, L.; Goddi, C.; Testi, L.; Palla, F.; Bacciotti, F.

    2012-09-01

    We present new Hubble Space Telescope/WFPC2 observations of 20 fields centered around T Tauri stars in the Chamaeleon I star-forming region. Images have been obtained in the F631N ([O I] λ6300), F656N (Hα), and F673N ([S II] λλ6716, 6731) narrow-band filters, plus the Johnson V-band equivalent F547M filter. We detect 31 T Tauri stars falling within our fields. We discuss the optical morphology of 10 sources showing evidence of either binarity, circumstellar material, or mass loss. We supplement our photometry with a compilation of optical, infrared, and submillimeter (sub-mm) data from the literature, together with new sub-mm data for three objects, to build the spectral energy distributions (SEDs) of 19 single sources. Using an SED model fitting tool, we self-consistently estimate a number of stellar and disk parameters, while mass accretion rates are directly derived from our Hα photometry. We find that bolometric luminosities derived from dereddened optical data tend to be underestimated in systems with high α2-24 IR spectral index, suggesting that disks seen nearly edge-on may occasionally be interpreted as low-luminosity (and therefore more evolved) sources. On the other hand, the same α2-24 IR spectral index, a tracer of the amount of dust in the warmer layers of the circumstellar disks, and the mass accretion rate appear to decay with the isochronal stellar age, suggesting that the observed age spread (sime 0.5-5 Myr) within the cluster is real. Our sample contains a few outliers that may have dissipated their circumstellar disks on a shorter timescale.

  8. The COS-Halos Survey: Origins of the Highly Ionized Circumgalactic Medium of Star-Forming Galaxies

    Science.gov (United States)

    Werk, Jessica K.; Prochaska, J. Xavier; Cantalupo, Sebastiano; Fox, Andrew J.; Oppenheimer, Benjamin; Tumlinson, Jason; Tripp, Todd M.; Lehner, Nicolas; McQuinn, Matthew

    2016-12-01

    The total contribution of diffuse halo gas to the galaxy baryon budget strongly depends on its dominant ionization state. In this paper, we address the physical conditions in the highly ionized circumgalactic medium (CGM) traced by {{O}} {{VI}} absorption lines observed in COS-Halos spectra. We analyze the observed ionic column densities, absorption-line widths and relative velocities, along with the ratios of {{N}} {{V}}/{{O}} {{VI}} for 39 fitted Voigt profile components of O vi. We compare these quantities with the predictions given by a wide range of ionization models. Photoionization models that include only extragalactic UV background radiation are ruled out; conservatively, the upper limits to {{N}} {{V}}/{{O}} {{VI}} and measurements of {N}{{O}{{VI}}} imply unphysically large path lengths ≳100 kpc. Furthermore, very broad {{O}} {{VI}} absorption (b > 40 km s-1) is a defining characteristic of the CGM of star-forming L* galaxies. We highlight two possible origins for the bulk of the observed {{O}} {{VI}}: (1) highly structured gas clouds photoionized primarily by local high-energy sources or (2) gas radiatively cooling on large scales behind a supersonic wind. Approximately 20% of circumgalactic O vi does not align with any low-ionization state gas within ±50 km s-1 and is found only in halos with {M}{halo} absorption traces the hot corona itself at a characteristic temperature of {10}5.5 K. We discuss the implications of these very distinct physical origins for the dynamical state, gas cooling rates, and total baryonic content of L* gaseous halos.

  9. Zizek's return to Lenin

    Directory of Open Access Journals (Sweden)

    Subotić Milan M.

    2004-01-01

    Full Text Available The paper offers a critical discussion of the thesis about the revived philosophical and political significance of Lenin, as recently propounded by Slavoj Zizek. Analyzing Zizek's writings, the author argues that the call for a "return to Lenin" derives from Zizek's strategy of "textual provocation" and the frustrating position of the leftist, radical tradition of political thought after the collapse of communism.

  10. An Editor's Journey: Return to Haiti

    Science.gov (United States)

    Moy, Yvette

    2012-01-01

    This paper recounts the author's story as she returned to Haiti in February to join a building project near Port-Au-Prince and to document efforts by U.S. higher education institutions to help the country rebound from the devastating 2010 earthquake. The author describes how consortiums have been formed in order to support the development of the…

  11. An Editor's Journey: Return to Haiti

    Science.gov (United States)

    Moy, Yvette

    2012-01-01

    This paper recounts the author's story as she returned to Haiti in February to join a building project near Port-Au-Prince and to document efforts by U.S. higher education institutions to help the country rebound from the devastating 2010 earthquake. The author describes how consortiums have been formed in order to support the development of the…

  12. NASA returns rocks from a comet.

    Science.gov (United States)

    Burnett, Don S

    2006-12-15

    Cometary particles returned by the Stardust Discovery Mission are primarily silicate materials of solar system origin. Some of the grains were formed at high temperatures close to the Sun, but then transported far out to the Kuiper belt region of the solar system before being incorporated in the comet.

  13. Return probability and k-step measures

    CERN Document Server

    Dronen, Nicholas

    2011-01-01

    The notion of return probability -- explored most famously by George P\\'{o}lya on d-dimensional lattices -- has potential as a measure for the analysis of networks. We present an efficient method for finding return probability distributions for connected undirected graphs. We argue that return probability has the same discriminatory power as existing k-step measures -- in particular, beta centrality (with negative beta), the graph-theoretical power index (GPI), and subgraph centrality. We compare the running time of our algorithm to beta centrality and subgraph centrality and find that it is significantly faster. When return probability is used to measure the same phenomena as beta centrality, it runs in linear time -- O(n+m), where n and m are the number of nodes and edges, respectively -- which takes much less time than either the matrix inversion or the sequence of matrix multiplications required for calculating the exact or approximate forms of beta centrality, respectively. We call this form of return pr...

  14. A CS J=5-->4 Mapping Survey Toward High-Mass Star-forming Cores Associated with Water Masers

    Science.gov (United States)

    Shirley, Yancy L.; Evans, Neal J., II; Young, Kaisa E.; Knez, Claudia; Jaffe, Daniel T.

    2003-12-01

    We have mapped 63 regions forming high-mass stars in CS J=5-->4 using the CSO. The CS peak position was observed in C34S J=5-->4 toward 57 cores and in 13CS J=5-->4 toward the nine brightest cores. The sample is a subset of a sample originally selected toward water masers; the selection on maser sources should favor sources in an early stage of evolution. The cores are located in the first and second Galactic quadrants with an average distance of 5.3+/-3.7 kpc and were well detected with a median peak signal-to-noise ratio in the integrated intensity of 40. The integrated intensity of CS J=5-->4 correlates very well with the dust continuum emission at 350 μm. For 57 sufficiently isolated cores, a well-defined angular size (FWHM) was determined. The core radius (RCS), aspect ratio [(a/b)obs], virial mass (Mvir), surface density (Σ), and the luminosity in the CS J=5-->4 line (L(CS54)) are calculated. The distributions of size, virial mass, surface density, and luminosity are all peaked with a few cores skewed toward much larger values than the mean. The median values, μ1/2, are as follows: μ1/2 (RCS)=0.32 pc, μ1/2 ((a/b)obs)=1.20, μ1/2 (Mvir)=920 Msolar, μ1/2 (Σ)=0.60 g cm-2, μ1/2 (L(CS54))=1.9×10-2 Lsolar, and μ1/2 (Lbol/Mvir)=165 (L/M)solar. We find a weak correlation between C34S line width and size, consistent with Δv~R0.3. The line widths are much higher than would be predicted by the usual relations between line width and size determined from regions of lower mass. These regions are very turbulent. The derived virial mass agrees within a factor of 2-3 with mass estimates from dust emission at 350 μm after corrections for the density structure are accounted for. The resulting cumulative mass spectrum of cores above 1000 Msolar can be approximated by a power law with a slope of about -0.9, steeper than that of clouds measured with tracers of lower density gas and close to that for the total masses of stars in OB associations. The median turbulent

  15. SXDF-ALMA 1.5 arcmin^2 deep survey. A compact dusty star-forming galaxy at z=2.5

    CERN Document Server

    Tadaki, Ken-ichi; Kodama, Tadayuki; Ikarashi, Soh; Aretxaga, Itziar; Berta, Stefano; Caputi, Karina I; Dunlop, James S; Hatsukade, Bunyo; Hayashi, Masao; Hughes, David H; Ivison, Rob; Izumi, Takuma; Koyama, Yusei; Lutz, Dieter; Makiya, Ryu; Matsuda, Yuichi; Nakanishi, Kouichiro; Rujopakarn, Wiphu; Tamura, Yoichi; Umehata, Hideki; Wang, Wei-Hao; Wilson, Grant W; Wuyts, Stijn; Yamaguchi, Yuki; Yun, Min S

    2015-01-01

    We present first results from the SXDF-ALMA 1.5 arcmin^2 deep survey at 1.1 mm using Atacama Large Millimeter Array (ALMA). The map reaches a 1sigma depth of 55 uJy/beam and covers 12 Halpha-selected star-forming galaxies at z = 2.19 or z=2.53. We have detected continuum emission from three of our Halpha-selected sample, including one compact star-forming galaxy with high stellar surface density, NB2315-07. They are all red in the rest-frame optical and have stellar masses of log (M*/Msun)>10.9 whereas the other blue, main-sequence galaxies with log(M*/Msun)=10.0-10.8 are exceedingly faint, <290 uJy (2sigma upper limit). We also find the 1.1 mm-brightest galaxy, NB2315-02, to be associated with a compact (R_e=0.7+-0.1 kpc), dusty star-forming component. Given high gas fraction (44^{+20}_{-8}% or 37^{+25}_{-3}%) and high star formation rate surface density (126^{+27}_{-30} Msun yr^{-1}kpc^{-2}), the concentrated starburst can within less than 50^{+12}_{-11} Myr build up a stellar surface density matching th...

  16. Restaurant customer satisfaction and return patronage in a Bloemfontein shopping mall

    Directory of Open Access Journals (Sweden)

    Hermanus Johannes Moolman

    2011-12-01

    Full Text Available Purpose: Restaurants form one of the core components of a mall's retail offering and its tenant mix. In order to successfully manage the tenant mix, research suggests that mall management continuously monitor their tenants' performance through customer satisfaction and return patronage surveys. The purpose of the study on which this article is based, was to gain insight into restaurant customers' satisfaction and return patronage in a shopping mall context. Research questions: The research was conceptualised with the following three research questions in mind: Which dining attributes are important for customer satisfaction and return patronage in mall restaurants? Is there a difference in restaurant customers' satisfaction and return patronage levels based on their demographic characteristics? Is there a difference in restaurant customers' satisfaction and return patronage in the respective mall restaurants? Design / methodology / approach: A mixed-methods research design was followed. The views of restaurateurs and mall managers were explored (qualitative and 590 customers of eight restaurants situated in the mall successfully completed questionnaires (quantitative. Analysis of variance, t-tests, correlation analysis and regression analysis were performed to reach the objectives of the study. Findings: This research showed that food quality, quality service, restaurant ambience, the quality of facilities and the presence of management are important attributes in contributing to customers' overall dining satisfaction. Food quality and overall dining satisfaction are regarded as important attributes for restaurant customers' decision to return to a mall restaurant. Demographic characteristics of restaurant customers have little impact on customer satisfaction and return patronage levels. Mall restaurants were not equally successful in satisfying their customers in terms of service quality, quality of facilities and the presence of management

  17. The KMOS Redshift One Spectroscopic Survey (KROSS): dynamical properties, gas and dark matter fractions of typical z ˜ 1 star-forming galaxies

    Science.gov (United States)

    Stott, John P.; Swinbank, A. M.; Johnson, Helen L.; Tiley, Alfie; Magdis, Georgios; Bower, Richard; Bunker, Andrew J.; Bureau, Martin; Harrison, Chris M.; Jarvis, Matt J.; Sharples, Ray; Smail, Ian; Sobral, David; Best, Philip; Cirasuolo, Michele

    2016-04-01

    The KMOS Redshift One Spectroscopic Survey (KROSS) is an ESO-guaranteed time survey of 795 typical star-forming galaxies in the redshift range z = 0.8-1.0 with the KMOS instrument on the Very Large Telescope. In this paper, we present resolved kinematics and star formation rates for 584 z ˜ 1 galaxies. This constitutes the largest near-infrared Integral Field Unit survey of galaxies at z ˜ 1 to date. We demonstrate the success of our selection criteria with 90 per cent of our targets found to be H α emitters, of which 81 per cent are spatially resolved. The fraction of the resolved KROSS sample with dynamics dominated by ordered rotation is found to be 83 ± 5 per cent. However, when compared with local samples these are turbulent discs with high gas to baryonic mass fractions, ˜35 per cent, and the majority are consistent with being marginally unstable (Toomre Q ˜ 1). There is no strong correlation between galaxy averaged velocity dispersion and the total star formation rate, suggesting that feedback from star formation is not the origin of the elevated turbulence. We postulate that it is the ubiquity of high (likely molecular) gas fractions and the associated gravitational instabilities that drive the elevated star formation rates in these typical z ˜ 1 galaxies, leading to the 10-fold enhanced star formation rate density. Finally, by comparing the gas masses obtained from inverting the star formation law with the dynamical and stellar masses, we infer an average dark matter to total mass fraction within 2.2re (9.5 kpc) of 65 ± 12 per cent, in agreement with the results from hydrodynamic simulations of galaxy formation.

  18. The return branch of viscous fingers

    CERN Document Server

    Vera, F

    2005-01-01

    We report a simple experiment of two-dimensional pattern formation in a circular Hele-Shaw cell, showing the appearance of a return branch that is equivalent to the upward-connecting leader of lightning. Injecting water from the center into a foam filled cell, we obtained patterns similar to dendrites of two-dimensional dielectric breakdown experiments. When we repeat this experiment allowing the presence of water in the outer (low pressure) region, dendrites grow initially as in a normal experiment, but when a branch is near the outer boundary, the low pressure water begins to penetrate the foam against the pressure field, forming several return branches.

  19. A Keck Adaptive Optics Survey of a Representative Sample of Gravitationally-Lensed Star-Forming Galaxies: High Spatial Resolution Studies of Kinematics and Metallicity Gradients

    CERN Document Server

    Leethochawalit, Nicha; Ellis, Richard S; Stark, Daniel P; Richard, Johan; Zitrin, Adi; Auger, Matthew

    2015-01-01

    We discuss spatially resolved emission line spectroscopy secured for a total sample of 15 gravitationally lensed star-forming galaxies at a mean redshift of $z\\simeq2$ based on Keck laser-assisted adaptive optics observations undertaken with the recently-improved OSIRIS integral field unit (IFU) spectrograph. By exploiting gravitationally lensed sources drawn primarily from the CASSOWARY survey, we sample these sub-L$^{\\ast}$ galaxies with source-plane resolutions of a few hundred parsecs ensuring well-sampled 2-D velocity data and resolved variations in the gas-phase metallicity. Such high spatial resolution data offers a critical check on the structural properties of larger samples derived with coarser sampling using multiple-IFU instruments. We demonstrate how serious errors of interpretation can only be revealed through better sampling. Although we include four sources from our earlier work, the present study provides a more representative sample unbiased with respect to emission line strength. Contrary t...

  20. Property fund flows and returns

    OpenAIRE

    Stephen L. Lee

    2000-01-01

    This study is concerned with the impacts on property returns from property fund flows, and with the possibility of a reverse transmission from property fund flows to property returns. In other words this study investigates whether property returns “cause” fund flow changes, or whether fund flow changes “cause” property returns, or causality works in both directions.\\ud \\ud \\ud \\ud

  1. Property fund flows and returns

    OpenAIRE

    Lee, Stephen L.

    2000-01-01

    This study is concerned with the impacts on property returns from property fund flows, and with the possibility of a reverse transmission from property fund flows to property returns. In other words this study investigates whether property returns “cause” fund flow changes, or whether fund flow changes “cause” property returns, or causality works in both directions.\\ud \\ud \\ud \\ud

  2. A Pan-STARRS1 Proper-Motion Survey for Young Brown Dwarfs in the Taurus and the Upper Scorpius Star-Forming Regions

    Science.gov (United States)

    Zhang, Zhoujian; Liu, Michael C.; Best, William M. J.; Magnier, Eugene A.; Aller, Kimberly Mei

    2017-01-01

    Young brown dwarfs are of prime importance to investigate the universality of the initial mass function (IMF) and to understand the physical connections between substellar and planetary-mass objects. Pan-STARRS1 (PS1) 3π survey (δ ≥ -30○) is finished and has obtained stacked images reaching down to the planetary regime (≤ 13 MJup) in nearby star-forming regions, thus providing an innovative tool to search for brown dwarfs. Using photometry and astrometry from PS1, WISE, 2MASS and UKIDSS, we are performing the widest and deepest brown dwarf survey in Taurus (≈370 deg2, ˜1 Myr) and Upper Scorpius (USco, ≈450 deg2, ˜10 Myr), which are among the closest star-forming regions. Our work is the first to measure proper motions, a robust proxy of membership, for Taurus and USco brown dwarf candidates over such large area and long time baseline (˜13 yr by combining PS1 and 2MASS). Our spectroscopic follow-up has found the lowest-mass objects in both regions (Taurus: ≈ 6 MJup USco: ≈ 14 MJup), and has yielded a success rates of ≈ 80% and ≈ 90% in Taurus and USco, respectively, far better than any previous searches (≤ 50%). Our newly confirmed members have already added ≈ 60% more brown dwarfs in USco and more than doubled the number of L-type members (≤ 20 MJup) in both regions. Upon completion, our discoveries will be a significant addition to the substellar regimes of the Taurus and the USco IMF and will provide more benchmarks to investigate the compositions of substellar and planetary atmospheres.

  3. Nebular excitation in z ∼ 2 star-forming galaxies from the SINS and LUCI surveys: The influence of shocks and active galactic nuclei

    Energy Technology Data Exchange (ETDEWEB)

    Newman, Sarah F.; Genzel, Reinhard [Department of Astronomy, Campbell Hall, University of California, Berkeley, CA 94720 (United States); Buschkamp, Peter; Förster Schreiber, Natascha M.; Kurk, Jaron; Rosario, David; Davies, Ric; Eisenhauer, Frank; Lutz, Dieter [Max-Planck-Institut für extraterrestrische Physik (MPE), Giessenbachstr. 1, D-85748 Garching (Germany); Sternberg, Amiel [School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978 (Israel); Gnat, Orly [Racah Institute of Physics, The Hebrew University, Jerusalem 91904 (Israel); Mancini, Chiara; Renzini, Alvio [Osservatorio Astronomico di Padova, Vicolo dell' Osservatorio 5, I-35122 Padova (Italy); Lilly, Simon J.; Carollo, C. Marcella [Institute of Astronomy, Department of Physics, Eidgenössische Technische Hochschule, ETH, CH-8093 Zürich (Switzerland); Burkert, Andreas [Universitäts-Sternwarte Ludwig-Maximilians-Universität (USM), Scheinerstr. 1, D-81679 München (Germany); Cresci, Giovanni [Istituto Nazionale di Astrofisica Osservatorio di Bologna, Via Ranzani 1, I-40127 Bologna (Italy); Genel, Shy [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Shapiro Griffin, Kristen [Space Sciences Research Group, Northrop Grumman Aerospace Systems, Redondo Beach, CA 90278 (United States); Hicks, Erin K. S., E-mail: sfnewman@berkeley.edu [Department of Astronomy, University of Washington, Box 351580, U.W., Seattle, WA 98195-1580 (United States); and others

    2014-01-20

    Based on high-resolution, spatially resolved data of 10 z ∼ 2 star-forming galaxies from the SINS/zC-SINF survey and LUCI data for 12 additional galaxies, we probe the excitation properties of high-z galaxies and the impact of active galactic nuclei (AGNs), shocks, and photoionization. We explore how these spatially resolved line ratios can inform our interpretation of integrated emission line ratios obtained at high redshift. Many of our galaxies fall in the 'composite' region of the z ∼ 0 [N II]/Hα versus [O III]/Hβ diagnostic (BPT) diagram, between star-forming galaxies and those with AGNs. Based on our resolved measurements, we find that some of these galaxies likely host an AGN, while others appear to be affected by the presence of shocks possibly caused by an outflow or from an enhanced ionization parameter as compared with H II regions in normal, local star-forming galaxies. We find that the Mass-Excitation (MEx) diagnostic, which separates purely star-forming and AGN hosting local galaxies in the [O III]/Hβ versus stellar mass plane, does not properly separate z ∼ 2 galaxies classified according to the BPT diagram. However, if we shift the galaxies based on the offset between the local and z ∼ 2 mass-metallicity relation (i.e., to the mass they would have at z ∼ 0 with the same metallicity), we find better agreement between the MEx and BPT diagnostics. Finally, we find that metallicity calibrations based on [N II]/Hα are more biased by shocks and AGNs at high-z than the [O III]/Hβ/[N II]/Hα calibration.

  4. Titan Science Return Quantification

    Science.gov (United States)

    Weisbin, Charles R.; Lincoln, William

    2014-01-01

    Each proposal for a NASA mission concept includes a Science Traceability Matrix (STM), intended to show that what is being proposed would contribute to satisfying one or more of the agency's top-level science goals. But the information traditionally provided cannot be used directly to quantitatively compare anticipated science return. We added numerical elements to NASA's STM and developed a software tool to process the data. We then applied this methodology to evaluate a group of competing concepts for a proposed mission to Saturn's moon, Titan.

  5. How to Determine the Increasing Returns Sensitivity of Your Industry?

    NARCIS (Netherlands)

    M.H. Klein (Martin); E. den Hartigh; H.R. Commandeur (Harry); F. Langerak (Fred)

    2004-01-01

    textabstractIncreasing returns means that self-reinforcing mechanisms are at work within firms and markets. These mechanisms come in four forms: scale effects, learning effects, network effects and social interaction effects. Some industries are more sensitive to increasing returns than others. It i

  6. The VMC Survey XXII. Hierarchical Star Formation in the 30 Doradus-N158-N159-N160 Star-Forming Complex

    CERN Document Server

    Sun, Ning-Chen; Subramanian, Smitha; Cioni, Maria-Rosa L; Rubele, Stefano; Bekki, Kenji; Ivanov, Valentin D; Piatti, Andrés E; Ripepi, Vincenzo

    2016-01-01

    We study the hierarchical stellar structures in a $\\sim$1.5 deg$^2$ area covering the 30 Doradus-N158-N159-N160 star-forming complex with the VISTA Survey of the Magellanic Clouds. Based on the young upper main-sequence stars, we find that the surface densities cover a wide range of values, from log($\\Sigma\\cdot$pc$^2$) $\\lesssim$ $-$2.0 to log($\\Sigma\\cdot$pc$^2$) $\\gtrsim$ 0.0. Their distributions are highly non-uniform, showing groups that frequently have sub-groups inside. The sizes of the stellar groups do not exhibit characteristic values, and range continuously from several parsecs to more than 100 pc; the cumulative size distribution can be well described by a single power law, with the power-law index indicating a projected fractal dimension $D_2$ = 1.6 $\\pm$ 0.3. We suggest that the phenomena revealed here support a scenario of hierarchical star formation. Comparisons with other star-forming regions and galaxies are also discussed.

  7. Dust extinction from Balmer decrements of star-forming galaxies at 0.75survey

    CERN Document Server

    Domínguez, A; Henry, A L; Scarlata, C; Bedregal, A G; Malkan, M; Atek, H; Ross, N R; Colbert, J W; Teplitz, H I; Rafelski, M; McCarthy, P; Bunker, A; Hathi, N P; Dressler, A; Martin, C L; Masters, D

    2012-01-01

    Spectroscopic observations of Halpha and Hbeta emission lines of 129 star-forming galaxies in the redshift range 0.75survey. Interstellar dust extinction is derived from stacking the Halpha/Hbeta flux ratio, the Balmer decrement, as a function of Halpha luminosity down to LHa ~ 3 x 10^{41} erg s^{-1}, galaxy stellar mass down to M_{*} ~ 4 x 10^{8} Msun, and rest-frame Halpha equivalent width. The faintest galaxies are five times fainter in Halpha luminosity than galaxies previously studied at z ~ 1.5. We provide empirical relations to correct for the effect of dust extinction in star-forming galaxies as a function of Halpha luminosity and stellar mass. A clear evolution is observed where galaxies of the same Halpha luminosity have lower extinction at higher redshifts, whereas ...

  8. The VMC Survey. XXII. Hierarchical Star Formation in the 30 Doradus-N158–N159–N160 Star-forming Complex

    Science.gov (United States)

    Sun, Ning-Chen; de Grijs, Richard; Subramanian, Smitha; Cioni, Maria-Rosa L.; Rubele, Stefano; Bekki, Kenji; Ivanov, Valentin D.; Piatti, Andrés E.; Ripepi, Vincenzo

    2017-02-01

    We study the hierarchical stellar structures in a ∼1.5 deg2 area covering the 30 Doradus-N158–N159–N160 star-forming complex with the VISTA Survey of Magellanic Clouds. Based on the young upper main-sequence stars, we find that the surface densities cover a wide range of values, from log({{Σ }}\\cdot pc2) ≲ ‑2.0 to log({{Σ }}\\cdot pc2) ≳ 0.0. Their distributions are highly non-uniform, showing groups that frequently have subgroups inside. The sizes of the stellar groups do not exhibit characteristic values, and range continuously from several parsecs to more than 100 pc the cumulative size distribution can be well described by a single power law, with the power-law index indicating a projected fractal dimension D2 = 1.6 ± 0.3. We suggest that the phenomena revealed here support a scenario of hierarchical star formation. Comparisons with other star-forming regions and galaxies are also discussed.

  9. The MOSDEF Survey: The Strong Agreement Between Hα and UV-To-FIR Star Formation Rates for z ~ 2 Star-Forming Galaxies

    Science.gov (United States)

    Shivaei, Irene; Reddy, Naveen; Kriek, Mariska T.; Shapley, Alice E.; Mobasher, Bahram; Coil, Alison L.; Siana, Brian D.; Sanders, Ryan; Price, Sedona; Freeman, William R.; Azadi, Mojegan

    2016-06-01

    We present the first direct comparison between Balmer line and panchromatic SED-based star-formation rates (SFRs) for z ~ 2 galaxies. While dust-corrected SFRs(Hα,Hβ) using Balmer decrements are commonly used at low redshift, it has been argued that Balmer lines may miss optically thick star-forming regions at high redshifts. In order to investigate this possible bias, we compare the SFRs(Hα,Hβ) with independently measured UV-to-far-IR SFRs for star-forming galaxies at z ~ 2. For this comparison we use a sample of galaxies selected from the unique spectroscopic dataset of the MOSFIRE Deep Evolution Field (MOSDEF) survey. The MOSDEF survey is a multi-year project that uses the near-IR MOSFIRE spectrograph on the 10-m Keck I telescope to characterize the gaseous and stellar contents of ~ 1500 rest-frame optically selected galaxies at 1.37 ≤ z ≤ 3.80. In addition to the rest-frame optical spectra, we use data from Spitzer/MIPS 24 μm, Herschel/PACS 100 and 160 μm, and Herschel/SPIRE 250, 350, and 500 μm to measure mid- and far-IR fluxes. We fit the UV-to-far-IR SEDs with the state-of-the-art flexible stellar population synthesis (FSPS) models, which utilize energy balance to fit the stellar and dust emission simultaneously. Comparing the SFR(Hα,Hβ) with the robust UV-to-far-IR SED inferrred SFRs, show us how accurately Balmer decrements predict the obscuration of the nebular lines in order to robustly calculate SFRs for star-forming galaxies at high redshift. Furthermore, we use our data to assess SFR indicators based on modeling the UV-to-mid-IR SEDs or by adding SFR(UV) and SFR(IR), for which the latter is based on the empirical conversions from mid-IR to total IR luminosity. This study shed light on the validity of various SFR indicators, specifically the nebular emission lines, for galaxies at z ~ 2.

  10. The return to foreign aid

    DEFF Research Database (Denmark)

    Dalgaard, Carl-Johan Lars; Hansen, Henrik

    We investigate the marginal productivity of investment across countries. The aim is to estimate the return on investments financed by foreign aid and by domestic resource mobilization, using aggregate data. Both returns are expected to vary across countries and time. Consequently we develop a cor...... cent. This is in accord with micro estimates of the economic rate of return.......We investigate the marginal productivity of investment across countries. The aim is to estimate the return on investments financed by foreign aid and by domestic resource mobilization, using aggregate data. Both returns are expected to vary across countries and time. Consequently we develop...... a correlated random coefficients model, to estimate the average aggregate return on ‘aid investments’ and ‘domestic investments’. Across different estimators and two different sources for GDP and investment data our findings are remarkably robust; the average gross return on ‘aid investments’ is about 20 per...

  11. Return Migration to Mexico: Does Health Matter?

    Science.gov (United States)

    Arenas, Erika; Goldman, Noreen; Pebley, Anne R; Teruel, Graciela

    2015-12-01

    We use data from three rounds of the Mexican Family Life Survey to examine whether migrants in the United States returning to Mexico in the period 2005-2012 have worse health than those remaining in the United States. Despite extensive interest by demographers in health-related selection, this has been a neglected area of study in the literature on U.S.-Mexico migration, and the few results to date have been contradictory and inconclusive. Using five self-reported health variables collected while migrants resided in the United States and subsequent migration history, we find direct evidence of higher probabilities of return migration for Mexican migrants in poor health as well as lower probabilities of return for migrants with improving health. These findings are robust to the inclusion of potential confounders reflecting the migrants' demographic characteristics, economic situation, family ties, and origin and destination characteristics. We anticipate that in the coming decade, health may become an even more salient issue in migrants' decisions about returning to Mexico, given the recent expansion in access to health insurance in Mexico.

  12. Return migration from Canada to Britain.

    Science.gov (United States)

    Richmond, A H

    1968-07-01

    Abstract Statistics of migrants returning from Canada to Britain and re-registering for national insurance purposes are compared with labour force immigrants entering Canada between 1956 and 1965. Short and long-term indices are calculated which suggest that return migration has been increasing since 1960. A sample survey carried out in 1962-63 distinguishes three types of returning migrant: (a) quasi-migrants who originally planned to return to Britain; (b) permanent repatriates who originally intended to settle in Canada but now expect to remain in Britain; (c) transilient migrants who exhibit a high propensity to move backwards and forwards between two or more countries without becoming permanently rooted in anyone. The demographic, economic and social characteristics of the three types are described. A further comparison is made between migrants who plan to settle in Britain, those who intend to come back again to Canada, and those who are uncertain of their future plans or who intend to move on to a third country.

  13. Efficient Return Algorithms For Associated Plasticity With Multiple Yield Planes

    DEFF Research Database (Denmark)

    Clausen, Johan Christian; Damkilde, Lars; Andersen, Lars

    2006-01-01

    A new return method for implicit integration of linear isotropic yield criteria is presented. The basic idea is to perform all the manipulations in the principal stress space and thereby achieve very simple formulae for calculating the plastic corrector stresses, based on the constant gradient...... of such criteria. The return formulae are in closed form and no iteration is required. The method accounts for three types of stress return: Return to a single yield plane, to a discontinuity line at the intersection of two yield planes and to a discontinuity point at the intersection between three or more yield...... planes. The infinitesimal and the consistent elastoplastic constitutive matrix are calculated for each type of stress return, as are the conditions to ascertain which type of return is required. The method is exemplified with the Mohr-Coulomb yield criterion....

  14. Trends in the Mincerian Rates of Return to Education in Urban China: 1989-2009

    Science.gov (United States)

    Xiaohao, Ding; Suhong, Yang; Ha, Wei

    2013-01-01

    This study examines the trends in the Mincerian rates of return (MRRs) to education in urban China between 1989 and 2009 using two sources of data: the China Urban Household Survey and the China Health and Nutrition Survey, and attempts to explain the underlying causes of the trends. The authors find that while the rates of return to education had…

  15. Maximizing your return on people.

    Science.gov (United States)

    Bassi, Laurie; McMurrer, Daniel

    2007-03-01

    Though most traditional HR performance metrics don't predict organizational performance, alternatives simply have not existed--until now. During the past ten years, researchers Laurie Bassi and Daniel McMurrer have worked to develop a system that allows executives to assess human capital management (HCM) and to use those metrics both to predict organizational performance and to guide organizations' investments in people. The new framework is based on a core set of HCM drivers that fall into five major categories: leadership practices, employee engagement, knowledge accessibility, workforce optimization, and organizational learning capacity. By employing rigorously designed surveys to score a company on the range of HCM practices across the five categories, it's possible to benchmark organizational HCM capabilities, identify HCM strengths and weaknesses, and link improvements or back-sliding in specific HCM practices with improvements or shortcomings in organizational performance. The process requires determining a "maturity" score for each practice, based on a scale of 1 (low) to 5 (high). Over time, evolving maturity scores from multiple surveys can reveal progress in each of the HCM practices and help a company decide where to focus improvement efforts that will have a direct impact on performance. The authors draw from their work with American Standard, South Carolina's Beaufort County School District, and a bevy of financial firms to show how improving HCM scores led to increased sales, safety, academic test scores, and stock returns. Bassi and McMurrer urge HR departments to move beyond the usual metrics and begin using HCM measurement tools to gauge how well people are managed and developed throughout the organization. In this new role, according to the authors, HR can take on strategic responsibility and ensure that superior human capital management becomes central to the organization's culture.

  16. 26 CFR 301.6103(j)(1)-1T - Disclosures of return information reflected on returns to officers and employees of the...

    Science.gov (United States)

    2010-04-01

    ... related activities (temporary). 301.6103(j)(1)-1T Section 301.6103(j)(1)-1T Internal Revenue INTERNAL... ADMINISTRATION Information and Returns Returns and Records § 301.6103(j)(1)-1T Disclosures of return information...(j)(1)-1(a) through (b)(3)(xxiv). (xxv) From Form 6765 (when filed with corporation income...

  17. Comparison of the Physical Activity and Sedentary Behaviour Assessment Questionnaire and the Short-Form International Physical Activity Questionnaire: An Analysis of Health Survey for England Data.

    Directory of Open Access Journals (Sweden)

    Shaun Scholes

    Full Text Available The Physical Activity and Sedentary Behaviour Assessment Questionnaire (PASBAQ, used within the Health Survey for England (HSE at 5-yearly intervals, is not included annually due to funding and interview-length constraints. Policy-makers and data-users are keen to consider shorter instruments such as the Short-form International Physical Activity Questionnaire (IPAQ for the annual survey. Both questionnaires were administered in HSE 2012, enabling comparative assessment in a random sample of 1252 adults.Relative agreement using prevalence-adjusted bias-adjusted Kappa (PABAK statistics was estimated for: sufficient aerobic activity (moderate-to-vigorous physical activity [MVPA] ≥150 minutes/week; inactivity (MVPA<30 minutes/week; and excessive sitting (≥540 minutes/weekday. Cross-sectional associations with health outcomes were compared across tertiles of MVPA and tertiles of sitting time using logistic regression with tests for linear trend.Compared with PASBAQ data, IPAQ-assessed estimates of sufficient aerobic activity and inactivity were higher and lower, respectively; estimates of excessive sitting were higher. Demographic patterns in prevalence were similar. Agreement using PABAK statistics was fair-to-moderate for sufficient aerobic activity (0.32-0.49, moderate-to-substantial for inactivity (0.42-0.74, and moderate-to-substantial for excessive sitting (0.49-0.75. As with the PASBAQ, IPAQ-assessed MVPA and sitting each showed graded associations with mental well-being (women: P for trend = 0.003 and 0.004, respectively and obesity (women: P for trend = 0.007 and 0.014, respectively.Capturing habitual physical activity and sedentary behaviour through brief questionnaires is complex. Differences in prevalence estimates can reflect differences in questionnaire structure and content rather than differences in reported behaviour. Treating all IPAQ-assessed walking as moderate-intensity contributed to the differences in prevalence estimates

  18. The FMOS-COSMOS Survey of Star-forming Galaxies at z ≈ 1.6. IV. Excitation State and Chemical Enrichment of the Interstellar Medium

    Science.gov (United States)

    Kashino, D.; Silverman, J. D.; Sanders, D.; Kartaltepe, J. S.; Daddi, E.; Renzini, A.; Valentino, F.; Rodighiero, G.; Juneau, S.; Kewley, L. J.; Zahid, H. J.; Arimoto, N.; Nagao, T.; Chu, J.; Sugiyama, N.; Civano, F.; Ilbert, O.; Kajisawa, M.; Le Fèvre, O.; Maier, C.; Masters, D.; Miyaji, T.; Onodera, M.; Puglisi, A.; Taniguchi, Y.

    2017-01-01

    We investigate the physical conditions of ionized gas in high-z star-forming galaxies using diagnostic diagrams based on the rest-frame optical emission lines. The sample consists of 701 galaxies with an Hα detection at 1.4≲ z≲ 1.7, from the Fiber Multi-Object Spectrograph (FMOS)-COSMOS survey, that represent the normal star-forming population over the stellar mass range {10}9.6≲ {M}* /{M}ȯ ≲ {10}11.6, with those at {M}* > {10}11 {M}ȯ being well sampled. We confirm an offset of the average location of star-forming galaxies in the Baldwin–Phillips–Terlevich (BPT) diagram ({{[O}} {{III}}]/{{H}}β versus {{[N}} {{II}}]/{{H}}α ), primarily toward higher {{[O}} {{III}}]/{{H}}β , compared with local galaxies. Based on the [S ii] ratio, we measure an electron density ({n}{{e}}={220}-130+170 {{cm}}-3), which is higher than that of local galaxies. Based on comparisons to theoretical models, we argue that changes in emission-line ratios, including the offset in the BPT diagram, are caused by a higher ionization parameter both at fixed stellar mass and at fixed metallicity, with additional contributions from a higher gas density and possibly a hardening of the ionizing radiation field. Ionization due to active galactic nuclei is ruled out as assessed with Chandra. As a consequence, we revisit the mass–metallicity relation using {{[N}}{{II}}]/{{H}}α and a new calibration including {{[N}} {{II}}]/{{[S}} {{II}}] as recently introduced by Dopita et al. Consistent with our previous results, the most massive galaxies ({M}* ≳ {10}11 {M}ȯ ) are fully enriched, while those at lower masses have metallicities lower than local galaxies. Finally, we demonstrate that the stellar masses, metallicities, and star formation rates of the FMOS sample are well fit with a physically motivated model for the chemical evolution of star-forming galaxies.

  19. The ALHAMBRA survey: B-band luminosity function of quiescent and star-forming galaxies at 0.2 ≤ z < 1 by PDF analysis

    Science.gov (United States)

    López-Sanjuan, C.; Tempel, E.; Benítez, N.; Molino, A.; Viironen, K.; Díaz-García, L. A.; Fernández-Soto, A.; Santos, W. A.; Varela, J.; Cenarro, A. J.; Moles, M.; Arnalte-Mur, P.; Ascaso, B.; Montero-Dorta, A. D.; Pović, M.; Martínez, V. J.; Nieves-Seoane, L.; Stefanon, M.; Hurtado-Gil, Ll.; Márquez, I.; Perea, J.; Aguerri, J. A. L.; Alfaro, E.; Aparicio-Villegas, T.; Broadhurst, T.; Cabrera-Caño, J.; Castander, F. J.; Cepa, J.; Cerviño, M.; Cristóbal-Hornillos, D.; González Delgado, R. M.; Husillos, C.; Infante, L.; Masegosa, J.; del Olmo, A.; Prada, F.; Quintana, J. M.

    2017-03-01

    Aims: Our goal is to study the evolution of the B-band luminosity function (LF) since z 1 using ALHAMBRA data. Methods: We used the photometric redshift and the I-band selection magnitude probability distribution functions (PDFs) of those ALHAMBRA galaxies with I ≤ 24 mag to compute the posterior LF. We statistically studied quiescent and star-forming galaxies using the template information encoded in the PDFs. The LF covariance matrix in redshift - magnitude - galaxy type space was computed, including the cosmic variance. That was estimated from the intrinsic dispersion of the LF measurements in the 48 ALHAMBRA sub-fields. The uncertainty due to the photometric redshift prior is also included in our analysis. Results: We modelled the LF with a redshift-dependent Schechter function affected by the same selection effects than the data. The measured ALHAMBRA LF at 0.2 ≤ zjB of star-forming galaxies, and a factor 1.25 ± 0.16 increase in the jB of quiescent ones since z = 1, confirming the continuous build-up of the quiescent population with cosmic time. The contribution of the faint quiescent population to jB increases from 3% at z = 1 to 6% at z = 0. The developed methodology will be applied to future multi-filter surveys such as J-PAS. Based on observations collected at the German-Spanish Astronomical Center, Calar Alto (CAHA), jointly operated by the Max-Planck-Institut für Astronomie (MPIA) at Heidelberg and the Instituto de Astrofísica de Andalucía (CSIC)

  20. The FMOS-COSMOS Survey of Star-forming Galaxies at Z ˜ 1.6. V: Properties of Dark Matter Halos Containing Hα Emitting Galaxies

    Science.gov (United States)

    Kashino, Daichi; More, Surhud; Silverman, John D.; Daddi, Emanuele; Renzini, Alvio; Sanders, David B.; Rodighiero, Giulia; Puglisi, Annagrazia; Kajisawa, Masaru; Valentino, Francesco; Kartaltepe, Jeyhan S.; Le Fèvre, Olivier; Nagao, Tohru; Arimoto, Nobuo; Sugiyama, Naoshi

    2017-07-01

    We study the properties of dark matter halos that contain star-forming galaxies at 1.43 ≤ z ≤ 1.74, using the FMOS-COSMOS survey. The sample consists of 516 objects with a detection of the Hα emission line, which represent the star forming population at this epoch, having a stellar mass range of 109.57 ≤ M */M ⊙ ≲ 1011.4 and a star-formation rate range of 15 ≲ SFR/(M ⊙ yr-1) ≲ 600. We measure the projected two-point correlation function while carefully taking into account observational biases, and find a significant clustering amplitude at scales of 0.04-10 h -1 cMpc, with a correlation length {r}0={5.26}-0.62+0.75 {h}-1 {cMpc} and a bias b={2.44}-0.32+0.38. We interpret our clustering measurement using a halo occupation distribution model. The sample galaxies appear to reside in halos with mass {M}{{h}}={4.71}-1.62+1.19× {10}12 {h}-1 {M}⊙ on average, which will likely become present-day halos of mass M h (z = 0) ˜ 2 × 1013 h -1 M ⊙, equivalent to the typical halo mass scale of galaxy groups. We then confirm the decline of the stellar-to-halo mass ratio at M h generation instrument that will provide strong constraints on the galaxy-formation scenario by obtaining precise measurements of galaxy clustering at z > 1.

  1. [Psychiatric Inpatient Treatment and Return to Work].

    Science.gov (United States)

    Mernyi, Lena; Hölzle, Patricia; Hamann, Johannes

    2017-05-12

    Objective People with mental diseases have a high risk of unemployment and they have only limited access to the labor market. The return to work is often associated with fears.The present study aims to provide an overview of the number of hospitalized psychiatric patients with permanent employment. Moreover it should give an insight into the process of return to work, the experiences patients gain and the support they receive. Methods In the participating clinics we measured the number of patients with permanent employment. The main inclusion criteria for further survey were the status of permanent employment and age between 18 and 65. The participating patients were interviewed on two occasions, at the time of inclusion and 3 months after the patient was discharged. The questions addressed working conditions, job satisfaction and the process of return-to-work. For statistical analysis, descriptive statistics (frequencies, means, standard deviations) were used. Results Only 21 % of n = 815 inpatients of the participating hospitals were permanently employed. Many patients did not return to work after being discharged. In many cases the interviewed patients saw a connection between their job and their current episode of illness. In this context patients reported unsatisfying workplace conditions such as long working hours, bad work organization and social conflicts. Conclusions For mentally ill patients, the employment rate in the primary labor market is devastating low. After psychiatric inpatient treatment patients are at high risk to lose their jobs. In order to prevent this development, work-related stress factors should be discussed with inpatients at an early stage and support should be provided during the return-to-work-process. © Georg Thieme Verlag KG Stuttgart · New York.

  2. Psychometric characteristics of the short form 36 health survey and functional assessment of chronic illness Therapy-Fatigue subscale for patients with ankylosing spondylitis

    Directory of Open Access Journals (Sweden)

    Luo Michelle P

    2011-05-01

    Full Text Available Abstract Background We evaluated the psychometric characteristics of the Short Form 36 (SF-36 Health Survey and the Functional Assessment of Chronic Illness Therapy (FACIT-Fatigue subscale in patients with ankylosing spondylitis (AS. Methods We analyzed clinical and patient-reported outcome (PRO data collected during 12-week, double-blind, placebo-controlled periods of two randomized controlled trials comparing adalimumab and placebo for the treatment of active AS. The Bath Ankylosing Spondylitis Disease Activity Index, Bath Ankylosing Spondylitis Functional Index, and other clinical measures were collected during the clinical trial. We evaluated internal consistency/reliability, construct validity, and responsiveness to change for the SF-36 and FACIT-Fatigue. Results The SF-36 (Cronbach alpha, 0.74-0.92 and FACIT-Fatigue (Cronbach alpha, 0.82-0.86 both had good internal consistency/reliability. At baseline, SF-36 and FACIT-Fatigue scores correlated significantly with Ankylosing Spondylitis Quality of Life scores (r = -0.36 to -0.66 and r = -0.70, respectively; all p Conclusions The SF-36 is a reliable, valid, and responsive measure of health-related quality of life and the FACIT-Fatigue is a brief and psychometrically sound measure of the effects of fatigue on patients with AS. These PROs may be useful in evaluating effectiveness of new treatments for AS. Trial Registration ClinicalTrials.gov: NCT00085644 and NCT00195819

  3. The MOSDEF Survey: The strong agreement between H-alpha and UV-to-FIR star formation rates for z~2 star-forming galaxies

    CERN Document Server

    Shivaei, Irene; Reddy, Naveen A; Shapley, Alice E; Barro, Guillermo; Conroy, Charlie; Coil, Alison L; Freeman, William R; Mobasher, Bahram; Siana, Brian; Sanders, Ryan; Price, Sedona H; Azadi, Mojegan; Pasha, Imad; Inami, Hanae

    2016-01-01

    We present the first direct comparison between Balmer line and panchromatic SED-based SFRs for z~2 galaxies. For this comparison we used 17 star-forming galaxies selected from the MOSFIRE Deep Evolution Field (MOSDEF) survey, with $3\\sigma$ detections for H$\\alpha$ and at least two IR bands (Spitzer/MIPS 24$\\mu$m and Herschel/PACS 100 and 160$\\mu$m, and in some cases Herschel/SPIRE 250, 350, and 500$\\mu$m). The galaxies have total IR (8-1000$\\mu$m) luminosities of $\\sim10^{11.4}-10^{12.4}\\,\\textrm{L}_\\odot$ and star-formation rates (SFRs) of $\\sim30-250\\,\\textrm{M}_\\odot\\,\\mathrm{yr^{-1}}$. We fit the UV-to-far-IR SEDs with flexible stellar population synthesis (FSPS) models - which include both stellar and dust emission - and compare the inferred SFRs with the SFR(H$\\alpha$,H$\\beta$) values corrected for dust attenuation using Balmer decrements. The two SFRs agree with a scatter of 0.17 dex. Our results imply that the Balmer decrement accurately predicts the obscuration of the nebular lines and can be used t...

  4. Physical and chemical differentiation of the luminous star-forming region W49A - Results from the JCMT Spectral Legacy Survey

    CERN Document Server

    Nagy, Z; Fuller, G A; Plume, R

    2015-01-01

    The massive and luminous star-forming region W49A is a well known Galactic candidate to probe the physical conditions and chemistry similar to those expected in external starburst galaxies. We aim to probe the physical and chemical structure of W49A on a spatial scale of ~0.8 pc based on the JCMT Spectral Legacy Survey, which covers the frequency range between 330 and 373 GHz. The wide 2x2 arcminutes field and the high spectral resolution of the HARP instrument on JCMT provides information on the spatial structure and kinematics of the cloud. For species where multiple transitions are available, we estimate excitation temperatures and column densities. We detected 255 transitions corresponding to 60 species in the 330-373 GHz range at the center position of W49A. Excitation conditions can be probed for 16 molecules. The chemical composition suggests the importance of shock-, PDR-, and hot core chemistry. Many molecular lines show a significant spatial extent across the maps including high density tracers (e.g...

  5. Detection of hot, metal-enriched outflowing gas around $z\\approx\\,$2.3 star-forming galaxies in the Keck Baryonic Structure Survey

    CERN Document Server

    Turner, Monica L; Steidel, Charles C; Rudie, Gwen C; Strom, Allison L

    2014-01-01

    We use quasar absorption lines to study the physical conditions in the circumgalactic medium of redshift $z\\approx 2.3$ star-forming galaxies taken from the Keck Baryonic Structure Survey (KBSS). In Turner et al. 2014 we used the pixel optical depth technique to show that absorption by HI and the metal ions OVI, NV, CIV, CIII and SiIV is strongly enhanced within $|\\Delta v|\\lesssim170$ km/s and projected distances $|d|\\lesssim180$ proper kpc from sightlines to the background quasars. Here we demonstrate that the OVI absorption is also strongly enhanced at fixed HI, CIV, and SiIV optical depths, and that this enhancement extends out to $\\sim350$ km/s. At fixed HI the increase in the median OVI optical depth near galaxies is 0.3-0.7 dex and is detected at 2--3-$\\sigma$ confidence for all seven HI bins that have $\\log_{10}\\tau_{\\rm HI}\\ge-1.5$. We use ionisation models to show that the observed strength of OVI as a function of HI is consistent with enriched, photoionised gas for pixels with $\\tau_{\\rm HI}\\gtrsim...

  6. The FMOS-COSMOS survey of star-forming galaxies at z ~ 1.6 I. H\\alpha -based star formation rates and dust extinction

    CERN Document Server

    Kashino, D; Rodighiero, G; Renzini, A; Arimoto, N; Daddi, E; Lilly, S J; Sanders, D B; Kartaltepe, J; Zahid, H J; Nagao, T; Sugiyama, N; Capak, P; Carollo, C M; Chu, J; Hasinger, G; Ilbert, O; Kajisawa, M; Kewley, L J; Koekemoer, A M; Kovač, K; Fèvre, O Le; Masters, D; McCracken, H J; Onodera, M; Scoville, N; Strazzullo, V; Symeonidis, M; Taniguchi, Y

    2013-01-01

    We present first results from a near-infrared spectroscopic survey of the COSMOS field, using the Fiber Multi-Object Spectrograph (FMOS) on the Subaru telescope, designed to characterize the star-forming galaxy population at 1.4

  7. The SINS/zC-SINF survey of z~2 galaxy kinematics: Evidence for powerful AGN-driven nuclear outflows in massive star-forming galaxies

    CERN Document Server

    Schreiber, N M Förster; Newman, S F; Kurk, J D; Lutz, D; Tacconi, L J; Wuyts, S; Bandara, K; Burkert, A; Buschkamp, P; Carollo, C M; Cresci, G; Daddi, E; Davies, R; Eisenhauer, F; Hicks, E K S; Lang, P; Lilly, S J; Mainieri, V; Mancini, C; Naab, T; Peng, Y; Renzini, A; Rosario, D; Griffin, K Shapiro; Shapley, A E; Sternberg, A; Tacchella, S; Vergani, D; Wisnioski, E; Wuyts, E; Zamorani, G

    2013-01-01

    We report the detection of ubiquitous powerful nuclear outflows in massive (> 10^11 Msun) z~2 star-forming galaxies (SFGs), which are plausibly driven by an Active Galactic Nucleus (AGN). The sample consists of the eight most massive SFGs from our SINS/zC-SINF survey of galaxy kinematics with the imaging spectrometer SINFONI, six of which have sensitive high-resolution adaptive optics (AO) assisted observations. All of the objects are disks hosting a significant stellar bulge. The spectra in their central regions exhibit a broad component in Halpha and forbidden [NII] and [SII] line emission, with typical velocity FWHM ~ 1500 km/s, [NII]/Halpha ratio ~ 0.6, and intrinsic extent of 2 - 3 kpc. These properties are consistent with warm ionized gas outflows associated with Type 2 AGN, the presence of which is confirmed via independent diagnostics in half the galaxies. The data imply a median ionized gas mass outflow rate of ~ 60 Msun/yr and mass loading of ~ 3. At larger radii, a weaker broad component is detecte...

  8. Understanding Guyton's venous return curves

    National Research Council Canada - National Science Library

    Beard, Daniel A; Feigl, Eric O

    2011-01-01

    ...) was experimentally increased the right atrial pressure decreased, Arthur Guyton and coworkers proposed an interpretation that right atrial pressure represents a back pressure restricting venous return...

  9. Teaching Form as Form

    DEFF Research Database (Denmark)

    Keiding, Tina Bering

    2012-01-01

    understanding of form per se, or, to use an expression from this text, of form as form. This challenge can be reduced to one question: how can design teaching support students in achieving not only the ability to recognize and describe different form-related concepts in existing design (i.e. analytical...... means that form serves both as the connective value and as the concept for reflection. In other words, form is observed as form, not anything else. The didactical challenge of teaching form as form is accentuated by students’ everyday-based pre-orientation towards function at the expense of form....... In general, students enter design education as far more skilled observers with regards to function than form. They are, in other words, predisposed to observe objects asking ‘what is?’, rather than ‘how is?’. This habit has not only cognitive implications. It is closely intertwined with a rudimentary...

  10. Teaching Form as Form

    DEFF Research Database (Denmark)

    Keiding, Tina Bering

    2012-01-01

    understanding of form per se, or, to use an expression from this text, of form as form. This challenge can be reduced to one question: how can design teaching support students in achieving not only the ability to recognize and describe different form-related concepts in existing design (i.e. analytical...... means that form serves both as the connective value and as the concept for reflection. In other words, form is observed as form, not anything else. The didactical challenge of teaching form as form is accentuated by students’ everyday-based pre-orientation towards function at the expense of form...... vocabulary of form. Even in cases in which teaching uses terms and phrases from everyday life (for instance, ‘intersection’), the meaning of the word cannot necessarily be transmitted directly from an ordinary vocabulary into a design context. And it is clearly a common issue for the contributions...

  11. The Individual Economic Returns to Volunteering in Work Life

    DEFF Research Database (Denmark)

    Qvist, Hans-Peter; Munk, Martin David

    2017-01-01

    This article examines the individual economic returns to volunteering over the course of one’s work life. Towards this end, the article uses a unique panel dataset created by combining rich survey data from Denmark with information on wages from administrative registers covering the period from 2...... mechanisms link volunteer work and wages depending on the current stage of people’s work lives.......This article examines the individual economic returns to volunteering over the course of one’s work life. Towards this end, the article uses a unique panel dataset created by combining rich survey data from Denmark with information on wages from administrative registers covering the period from...

  12. The Return to Foreign Aid

    DEFF Research Database (Denmark)

    Dalgaard, Carl-Johan Lars; Hansen, Henrik

    2017-01-01

    different estimators and two different data sources for GDP and investment our findings are remarkably robust; the average gross return on ‘aid investments’ is about 20 per cent. This is in accord with micro estimates of the economic rate of return on aid projects and with aggregate estimates of the rate...

  13. The return to foreign aid

    DEFF Research Database (Denmark)

    Dalgaard, Carl-Johan Lars; Hansen, Henrik

    a correlated random coefficients model, to estimate the average aggregate return on ‘aid investments’ and ‘domestic investments’. Across different estimators and two different sources for GDP and investment data our findings are remarkably robust; the average gross return on ‘aid investments’ is about 20 per...

  14. [Return to the family].

    Science.gov (United States)

    Ouaidou, N G

    1993-08-01

    Sahelian countries occupy an inglorious place in the global list of human development. The human development index is superior to the gross national product (GNP) at measuring the progress of a country in terms of development, because it includes income, longevity, and educational level. The highest ranked Sahelian country holds the 114th position out of a 173 countries. The low human development index scores for the Sahel reflects the socioeconomic crisis which has overcome these countries. In 1991, only 3 of 9 Sahelian countries had a mean GP equal or superior to US$500. Just 2 countries had a life expectancy greater than 50 years. In fact, the Sahel had a lower life expectancy than all of Africa (50 years) and much lower than Asia (64 years) and Latin America (67 years). The economic crisis is worse than the cold statistics show. It destabilizes the most disadvantaged populations. The pressure it exerts often leads public authorities to adopt unpopular measures. It depreciates some sociocultural values and disintegrates traditional social structures. It is accentuated by the effects of war and drought. Internal and external migration increases even as urban hope is uncertain. For most people, the family (the traditional framework of individual development) is ready to break apart, leaving only a disincarnate nuclear entity to subsist. Yet, African history is built around the extended family: the place of reproduction, production, distribution, formation, management, perpetuation of demographic behavior, and social control. Senegal and Mali have created ministries which invest in families. The Third African Conference on Population, in 1992, chose its theme to be the relationship between family, population, and sustainable development. It is important to return to the natural or primordial framework--family--as a refuge against the economic crisis.

  15. PROFILE OF ROMANIAN RETURNED MIGRANTS

    Directory of Open Access Journals (Sweden)

    Ana-Maria ZAMFIR

    2014-12-01

    Full Text Available In the post-communist period, migration of the Romanians became an emergent phenomenon which went through many structural transformations. Within the context of the recent economic crisis and of some unfavourable collective attitudes regarding the immigration in some countries of destination, evidences of the reverse movement, of return of some migrants in Romania have appeared. This paper aims to examine the profile of Romanian returned migrants, with a special view on the returning motivations. Results show that the family related factors have the highest influence in the returning decision among Romanian migrants. Finally, future intentions of the returned migrants confirm the model of the circulatory migration as a strategy of life of the Romanians.

  16. Star formation histories, extinction, and dust properties of strongly lensed z ~ 1.5-3 star-forming galaxies from the Herschel Lensing Survey

    Science.gov (United States)

    Sklias, P.; Zamojski, M.; Schaerer, D.; Dessauges-Zavadsky, M.; Egami, E.; Rex, M.; Rawle, T.; Richard, J.; Boone, F.; Simpson, J. M.; Smail, I.; van der Werf, P.; Altieri, B.; Kneib, J. P.

    2014-01-01

    Context. Multi-wavelength, optical to IR/submm observations of strongly lensed galaxies identified by the Herschel Lensing Survey are used to determine the physical properties of high-redshift star-forming galaxies close to or below the detection limits of blank fields. Aims: We aim to constrain theIR stellar and dust content, and to determine star formation rates and histories, dust attenuation and extinction laws, and other related properties. Methods: We studied a sample of seven galaxies with spectroscopic redshifts z ~ 1.5-3 that have been detected with precision thanks to gravitational lensing, and whose spectral energy distribution (SED) has been determined from the rest-frame UV to the IR/mm domain. For comparison, our sample includes two previously well-studied lensed galaxies, MS1512-cB58 and the Cosmic Eye, for which we also provide updated Herschel measurements. We performed SED fits of the full photometry of each object, and of the optical and infrared parts separately, exploring various star formation histories, using different extinction laws, and exploring the effects of nebular emission. The IR luminosity, in particular, is predicted consistently from the stellar population model. The IR observations and emission line measurements, where available, are used as a posteriori constraints on the models. We also explored energy conserving models, that we created by using the observed IR/UV ratio to estimate the extinction. Results: Among the models we have tested, models with exponentially declining star-forming histories including nebular emission and assuming the Calzetti attenuation law best fit most of the observables. Models assuming constant or rising star formation histories predict in most cases too much IR luminosity. The SMC extinction law underpredicts the IR luminosity in most cases, except for two out of seven galaxies, where we cannot distinguish between different extinction laws. Our sample has a median lensing-corrected IR luminosity ~3

  17. Psychometric characteristics of the short form 36 health survey and functional assessment of chronic illness Therapy-Fatigue subscale for patients with ankylosing spondylitis

    Science.gov (United States)

    2011-01-01

    Background We evaluated the psychometric characteristics of the Short Form 36 (SF-36) Health Survey and the Functional Assessment of Chronic Illness Therapy (FACIT)-Fatigue subscale in patients with ankylosing spondylitis (AS). Methods We analyzed clinical and patient-reported outcome (PRO) data collected during 12-week, double-blind, placebo-controlled periods of two randomized controlled trials comparing adalimumab and placebo for the treatment of active AS. The Bath Ankylosing Spondylitis Disease Activity Index, Bath Ankylosing Spondylitis Functional Index, and other clinical measures were collected during the clinical trial. We evaluated internal consistency/reliability, construct validity, and responsiveness to change for the SF-36 and FACIT-Fatigue. Results The SF-36 (Cronbach alpha, 0.74-0.92) and FACIT-Fatigue (Cronbach alpha, 0.82-0.86) both had good internal consistency/reliability. At baseline, SF-36 and FACIT-Fatigue scores correlated significantly with Ankylosing Spondylitis Quality of Life scores (r = -0.36 to -0.66 and r = -0.70, respectively; all p < 0.0001). SF-36 scores varied by indicators of clinical severity, with greater impairment observed for more severe degrees of clinical activity (all p < 0.0001). FACIT-Fatigue scores correlated significantly with SF-36 scores (r = 0.42 to 0.74; all p < 0.0001) and varied by clinical severity (p < 0.05 to p < 0.0001). Conclusions The SF-36 is a reliable, valid, and responsive measure of health-related quality of life and the FACIT-Fatigue is a brief and psychometrically sound measure of the effects of fatigue on patients with AS. These PROs may be useful in evaluating effectiveness of new treatments for AS. Trial Registration ClinicalTrials.gov: NCT00085644 and NCT00195819 PMID:21600054

  18. Mortality and health-related quality of life in prevalent dialysis patients: Comparison between 12-items and 36-items short-form health survey

    Directory of Open Access Journals (Sweden)

    Østhus Tone Brit

    2012-05-01

    Full Text Available Abstract Background To assess health- related quality of life (HRQOL with SF-12 and SF-36 and compare their abilities to predict mortality in chronic dialysis patients, after adjusting for traditional risk factors. Methods The Short-Form Health Survey (SF-36 with the embedded SF-12 was applied in 301 dialysis patients cross-sectionally. Physical and mental component summary (PCS-36, MCS-36, PCS-12, and MCS-12 scores were calculated. Clinical and demographic data were collected. Mortality (followed for up to 4.5 years was analyzed with Kaplan Meier plots and Cox proportional hazards, after censoring for renal transplantation. Exclusion factors were observation time Results In 252 patients (60.2 ± 15.5 years, 65.9% males, dialysis vintage 9.0, IQR 5.0-23.0 months, mortality during follow-up was 33.7%.(85 deaths. Significant correlations were observed between PCS-36 and PCS-12 (ρ = 0.93, p ρ = 0.95, p χ2 = 15.3, p = 0.002 and PCS-36 (χ2 = 16.7, p = 0.001. MCS was not associated with mortality. Adjusted hazard ratios for mortality were 2.5 (95% CI 1.0-6.3, PCS-12 and 2.7 (1.1 – 6.4, PCS-36 for the lowest compared with the highest (“best perceived” quartile of PCS. Conclusion Compromised HRQOL is an independent predictor of poor outcome in dialysis patients. The SF-12 provided similar predictions of mortality as SF-36, and may serve as an applicable clinical tool because it requires less time to complete.

  19. THE FMOS-COSMOS SURVEY OF STAR-FORMING GALAXIES AT z ∼ 1.6. I. Hα-BASED STAR FORMATION RATES AND DUST EXTINCTION

    Energy Technology Data Exchange (ETDEWEB)

    Kashino, D.; Sugiyama, N. [Division of Particle and Astrophysical Science, Graduate School of Science, Nagoya University, Nagoya 464-8602 (Japan); Silverman, J. D. [Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, The University of Tokyo, Kashiwanoha, Kashiwa 277-8583 (Japan); Rodighiero, G. [Dipartimento di Astronomia, Università di Padova, vicolo dell' Osservatorio 3, I-35122 Padova (Italy); Renzini, A. [INAF Osservatorio Astronomico di Padova, vicolo dell' Osservatorio 5, I-35122 Padova (Italy); Arimoto, N. [National Astronomical Observatory of Japan, Subaru Telescope, 650 North Aohoku Place, Hilo, HI 96720 (United States); Daddi, E. [CEA-Saclay, Service d' Astrophysique, F-91191 Gif-sur-Yvette (France); Lilly, S. J.; Carollo, C. M. [Institute for Astronomy, ETH Zürich, Wolfgang-Pauli-strasse 27, 8093 Zürich (Switzerland); Sanders, D. B.; Zahid, H. J.; Chu, J.; Hasinger, G.; Kewley, L. J. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Kartaltepe, J. [National Optical Astronomy Observatory, 950 N. Cherry Ave., Tucson, AZ 85719 (United States); Nagao, T. [The Hakubi Center for Advanced Research, Kyoto University, Kyoto 606-8302 (Japan); Capak, P. [California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Ilbert, O. [Aix Marseille Université, CNRS, LAM (Laboratoire d' Astrophysique de Marseille) UMR 7326, F-13388 Marseille (France); Kajisawa, M. [Research Center for Space and Cosmic Evolution, Ehime University, Bunkyo-cho 2-5, Matsuyama, Ehime 790-8577 (Japan); Koekemoer, A. M., E-mail: daichi@nagoya-u.jp [HST and JWST Instruments/Science Division, Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); and others

    2013-11-01

    We present the first results from a near-IR spectroscopic survey of the COSMOS field, using the Fiber Multi-Object Spectrograph on the Subaru telescope, designed to characterize the star-forming galaxy population at 1.4 < z < 1.7. The high-resolution mode is implemented to detect Hα in emission between 1.6-1.8 μm with f {sub Hα} ∼> 4 × 10{sup –17} erg cm{sup –2} s{sup –1}. Here, we specifically focus on 271 sBzK-selected galaxies that yield a Hα detection thus providing a redshift and emission line luminosity to establish the relation between star formation rate and stellar mass. With further J-band spectroscopy for 89 of these, the level of dust extinction is assessed by measuring the Balmer decrement using co-added spectra. We find that the extinction (0.6 ∼< A {sub Hα} ∼< 2.5) rises with stellar mass and is elevated at high masses compared to low-redshift galaxies. Using this subset of the spectroscopic sample, we further find that the differential extinction between stellar and nebular emission E {sub star}(B – V)/E {sub neb}(B – V) is 0.7-0.8, dissimilar to that typically seen at low redshift. After correcting for extinction, we derive an Hα-based main sequence with a slope (0.81 ± 0.04) and normalization similar to previous studies at these redshifts.

  20. The MOSDEF Survey: The Strong Agreement between Hα and UV-to-FIR Star Formation Rates for z ~ 2 Star-forming Galaxies

    Science.gov (United States)

    Shivaei, Irene; Kriek, Mariska; Reddy, Naveen A.; Shapley, Alice E.; Barro, Guillermo; Conroy, Charlie; Coil, Alison L.; Freeman, William R.; Mobasher, Bahram; Siana, Brian; Sanders, Ryan; Price, Sedona H.; Azadi, Mojegan; Pasha, Imad; Inami, Hanae

    2016-04-01

    We present the first direct comparison between Balmer line and panchromatic spectral energy distribution (SED)-based star formation rates (SFRs) for z˜ 2 galaxies. For this comparison, we used 17 star-forming galaxies selected from the MOSFIRE Deep Evolution Field (MOSDEF) survey, with 3σ detections for Hα and at least two IR bands (Spitzer/MIPS 24 μm and Herschel/PACS 100 and 160 μm, and in some cases Herschel/SPIRE 250, 350, and 500 μm). The galaxies have total IR (8-1000 μm) luminosities of ˜ 1011.4-1012.4 L⊙ and SFRs of ˜ 30-250 M⊙ yr-1. We fit the UV-to-far-IR SEDs with flexible stellar population synthesis (FSPS) models—which include both stellar and dust emission—and compare the inferred SFRs with the SFR(Hα, Hβ) values corrected for dust attenuation using Balmer decrements. The two SFRs agree with a scatter of 0.17 dex. Our results imply that the Balmer decrement accurately predicts the obscuration of the nebular lines and can be used to robustly calculate SFRs for star-forming galaxies at z˜ 2 with SFRs up to ˜ 200 M⊙ yr-1. We also use our data to assess SFR indicators based on modeling the UV-to-mid-IR SEDs or by adding SFR(UV) and SFR(IR), for which the latter is based on the mid-IR only or on the full IR SED. All these SFRs show a poorer agreement with SFR(Hα, Hβ) and in some cases large systematic biases are observed. Finally, we show that the SFR and dust attenuation derived from the UV-to-near-IR SED alone are unbiased when assuming a delayed exponentially declining star formation history. Based on observations made with the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration.

  1. THE OPTICALLY UNBIASED GRB HOST (TOUGH) SURVEY. VI. RADIO OBSERVATIONS AT z {approx}< 1 AND CONSISTENCY WITH TYPICAL STAR-FORMING GALAXIES

    Energy Technology Data Exchange (ETDEWEB)

    Michalowski, M. J.; Dunlop, J. S. [SUPA (Scottish Universities Physics Alliance), Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom); Kamble, A.; Kaplan, D. L. [Physics Department, University of Wisconsin-Milwaukee, Milwaukee, WI 53211 (United States); Hjorth, J.; Malesani, D.; Fynbo, J. P. U.; Kruehler, T. [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen O (Denmark); Reinfrank, R. F. [CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710 (Australia); Bonavera, L. [Instituto de Fisica de Cantabria, CSIC-Universidad de Cantabria, Avda. de los Castros s/n, E-39005 Santander (Spain); Castro Ceron, J. M. [Department of Radio Astronomy, Madrid Deep Space Communications Complex (INTA-NASA/INSA), Ctra. M-531, km. 7, E-28.294 Robledo de Chavela (Madrid) (Spain); Ibar, E. [UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Garrett, M. A. [Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo (Netherlands); Jakobsson, P. [Centre for Astrophysics and Cosmology, Science Institute, University of Iceland, Dunhagi 5, 107 Reykjavik (Iceland); Levan, A. J. [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Massardi, M. [INAF-Istituto di Radioastronomia, via Gobetti 101, I-40129 Bologna (Italy); Pal, S. [ICRAR, University of Western Australia, 35 Stirling Highway, Crawley, WA (Australia); Sollerman, J. [Oskar Klein Centre, Department of Astronomy, AlbaNova, Stockholm University, SE-10691 Stockholm (Sweden); Tanvir, N. R. [Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH (United Kingdom); Van der Horst, A. J., E-mail: mm@roe.ac.uk [Astronomical Institute ' Anton Pannekoek' , University of Amsterdam, Science Park 904, 1098XH Amsterdam (Netherlands); and others

    2012-08-20

    The objective of this paper is to determine the level of obscured star formation activity and dust attenuation in a sample of gamma-ray burst (GRB) hosts, and to test the hypothesis that GRB hosts have properties consistent with those of the general star-forming galaxy populations. We present a radio continuum survey of all z < 1 GRB hosts in The Optically Unbiased GRB Host (TOUGH) sample supplemented with radio data for all (mostly pre-Swift) GRB-SN hosts discovered before 2006 October. We present new radio data for 22 objects and have obtained a detection for three of them (GRB 980425, 021211, 031203; none in the TOUGH sample), increasing the number of radio-detected GRB hosts from two to five. The star formation rate (SFR) for the GRB 021211 host of {approx}825 M{sub Sun} yr{sup -1}, the highest ever reported for a GRB host, places it in the category of ultraluminous infrared galaxies. We found that at least {approx}63% of GRB hosts have SFR < 100 M{sub Sun} yr{sup -1} and at most {approx}8% can have SFR > 500 M{sub Sun} yr{sup -1}. For the undetected hosts the mean radio flux (<35 {mu}Jy 3{sigma}) corresponds to an average SFR < 15 M{sub Sun} yr{sup -1}. Moreover, {approx}> 88% of the z {approx}< 1 GRB hosts have ultraviolet dust attenuation A{sub UV} < 6.7 mag (visual attenuation A{sub V} < 3 mag). Hence, we did not find evidence for large dust obscuration in a majority of GRB hosts. Finally, we found that the distributions of SFRs and A{sub UV} of GRB hosts are consistent with those of Lyman break galaxies, H{alpha} emitters at similar redshifts, and of galaxies from cosmological simulations. The similarity of the GRB population with other star-forming galaxies is consistent with the hypothesis that GRBs, a least at z {approx}< 1, trace a large fraction of all star formation, and are therefore less biased indicators than once thought.

  2. Does Graded Return to Work Improve Disabled Workers’ Labour Market Attachment?

    DEFF Research Database (Denmark)

    Høgelund, Jan; Holm, Anders; McIntosh, James

    Using Danish register and survey data, we examine the effect of a graded-return-to-work program on sick-listed workers’ probability of returning to regular working hours. During program participa-tion, the worker receives the normal hourly wage for the hours worked and sickness benefit for the ho......Using Danish register and survey data, we examine the effect of a graded-return-to-work program on sick-listed workers’ probability of returning to regular working hours. During program participa-tion, the worker receives the normal hourly wage for the hours worked and sickness benefit...

  3. 47 CFR 1.795 - Reports regarding interstate rates of return.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 1 2010-10-01 2010-10-01 false Reports regarding interstate rates of return. 1... Requests § 1.795 Reports regarding interstate rates of return. Carriers shall file reports regarding interstate rates of return on FCC Form 492 as required by part 65 of this chapter. Services and...

  4. 城市流动就业人员的培训参与和培训收益率——基于北京调查数据%Training Participation and the Rate of Return of Migrant Labor in Urban Areas --Based On Survey Data in Beijing

    Institute of Scientific and Technical Information of China (English)

    戴凤燕

    2012-01-01

    近年来中国劳动力市场上人力资本回报率不断提高,表明就业培训是继学历教育后提高人力资本的重要方式。将外来市民和农民工两群体进行对比,并从机会、结果和效率几个方面探讨,可以发现培训中存在的问题和改进方向。根据有较好代表性的北京调查数据,农民工参加培训的机会低于外来市民但收益非常显著,外来市民培训参与率更高但收益不显著。企业培训的选择性造成培训资源的配置存在一定问题,需要引入更多机制增加对农民工的培训。%Recently, studies show the rate of return on human capital in China's labor market keeps rising. Employment training is an essential method to improve human capital after school education. It is important for discovering problems and providing appropriate policy advice by comparing urban and rural migrants from the aspects of opportunity, result and efficiency of training. Using a set of survey data in Beijing, it is found that rural migrants have fewer opportunities but higher return, while urban migrants have more opportunities but no significant return. The selectivity of company training hinders its efficiency. More mechanisms and organizations are needed to enhance training for rural migrants and further improve their working conditions and incomes.

  5. Study of status of migrant workers returns home and starts influencing factors ——based on the survey of 74 villages, 20 provinces, 2207 families in nationwide%返乡农民工创业现状及其影响因素分析——基于全国20省74村2207户的调查

    Institute of Scientific and Technical Information of China (English)

    赵莎莎

    2011-01-01

    Based on 74 villages in 20 provinces of returning migrant workers survey data, this paper use the SPSS17.0 to analysis the return of migrant status and impact factors of business. The research shows : level of education and other human capital factors, government support, family income, social capital and other social factors on whether you choose has a significant business impact.%基于对全国20省74村返乡农民工的调查数据,运用SPSS17.0对返乡农民创业现状及其影响因素进行分析,研究显示:受教育程度等人力资本因素、政府支持、家庭收入、社会资本等社会因素对其是否选择创业有着显著性影响。

  6. Returns management in the supply chain

    Directory of Open Access Journals (Sweden)

    Anna Maria Jeszka

    2014-09-01

    Full Text Available Background:  The aim of this exploratory empirical research was to evaluate the level of cooperation in the area of reverse logistics between selected retail chains and logistics operators and suppliers; to identify and evaluate the influence the procedures of handling returns have on the relationships with customers, cost reduction, value recovery, inventory reduction and increasing profitability; as well as determining to what extent logistics operators are involved in the procedures of handling returns in the analysed chains. Methods: Based on the literature and the experience of researchers from developed countries a questionnaire was constructed which was subsequently used to conduct empirical research in selected retail chains operating in two provinces in Poland. The questionnaire survey involved the sales personnel of selected retail chains in the clothing industry. Overall, 105 questionnaires were collected and analysed. Results: Various aspects of cooperation with suppliers and logistics operators in respect of handling returns were evaluated. Most indicators of cooperation were evaluated favourably, with the exception of joint access to the database, the use of inventory data available online, and access to information from the warehouse, which received low marks from the respondents. In the case of the studied stores, some of the activities in the area of reverse logistics are outsourced; for example, obtaining products from users, logistics, and the transport of returns are typically done by an outside operator. Inspection, sorting, appraisal, repairs, as well as the sales of refurbished products are usually performed within the studied retail corporations. Conclusions: The research has shown that the retail chains developed very good programmes for handling returns in the supply chain, as evidenced by the presented and highly rated indicators of cooperation, with the exception of information exchange where there is still much

  7. Nurses Returning to School: Motivators, Inhibitors and Job Satisfaction.

    Science.gov (United States)

    Harris, Patrick W; Burman, Mary E

    2016-01-01

    Health care employers and national nursing organizations are placing increased emphasis on nurses earning a baccalaureate degree or higher. This study examines the impact of motivators (professional and personal motivation), inhibitors (time constraints and employer discouragement), and job satisfaction on intent to return to school. Approximately half of the employed nurses in Wyoming were surveyed using a mailed questionnaire in the summer of 2013. Perceived employer discouragement and time constraints continued to play a direct role on intent to return to school regardless of nurse motivation or job satisfaction. However, motivation and job satisfaction also contributed to a nurse's intent to return to school. These results suggest that motivation and job satisfaction are significant regarding intent to return to school but can be limited by both perceived discouragement of one's employer and perceived time constraints. In order to meet the increasing demands of a better-educated nursing workforce, a shift in workplace dynamics may be warranted.

  8. Estimating Marginal Returns to Education

    Science.gov (United States)

    Carneiro, Pedro; Heckman, James J.; Vytlacil, Edward

    2011-01-01

    This paper estimates marginal returns to college for individuals induced to enroll in college by different marginal policy changes. The recent instrumental variables literature seeks to estimate this parameter, but in general it does so only under strong assumptions that are tested and found wanting. We show how to utilize economic theory and local instrumental variables estimators to estimate the effect of marginal policy changes. Our empirical analysis shows that returns are higher for individuals with values of unobservables that make them more likely to attend college. We contrast our estimates with IV estimates of the return to schooling. PMID:25110355

  9. Sovereign Risk and Currently Returns

    DEFF Research Database (Denmark)

    Della Corte, Pasquale; Sarno, Lucio; Schmeling, Maik

    explanatory power for currency returns which is largely driven by shocks to global credit risk. Consistent with the notion that sovereign risk is priced, we find that a country's exposure to global credit risk forecasts excess returns to trading exchange rates as well as to trading on the volatility, skewness......We empirically investigate the relation between sovereign risk and exchange rates for a broad set of currencies. An increase in the credit default swap (CDS) spread of a country is accompanied by a significant depreciation of the exchange rate. More generally, CDS spread changes have substantial......, and kurtosis of currency returns....

  10. Metal Returns, Stock Returns and Stock Market Volatility

    Directory of Open Access Journals (Sweden)

    Mauricio Zevallos

    2015-08-01

    Full Text Available Given the extensive participation of mining stocks in the Peruvian stock market, the Lima Stock Exchange (BVL provides an ideal setting for exploring both the impact of metal returns on mining stock returns and stock market volatility, and the comovements between mining stock returns and metal returns. This research is a first attempt to explore these issues using international metal prices and the prices of the most important mining stocks on the BVL and the IGBVL index. To achieve this, we use univariate GARCH models to model individual volatilities, and the Exponentially Weighted Moving Average (EWMA method and multivariate GARCH models with time-varying correlations to model comovements in returns. We found that Peruvian mining stock volatilities mimic the behavior of metal volatilities and that there are important correlation levels between metals and mining stock returns. In addition, we found time-varying correlations with distinctive behavior in different periods, with rises potentially related to international and local historical events.

  11. Return migration of high skilled workers : The case of Suriname

    NARCIS (Netherlands)

    Ph.H.B.F. Franses (Philip Hans)

    2015-01-01

    markdownabstract__Abstract__ In this paper we study the determinants of skilled return migration from the Netherlands to Suriname. Based on a survey of Gibson and McKenzie (2011) we managed to interview 283 former top students from Suriname. This unique database is informative in various dimensions

  12. Reentry Issues upon Returning from Study Abroad Programs

    Science.gov (United States)

    Wielkiewicz, Richard M.; Turkowski, Laura W.

    2010-01-01

    The impact of returning from studying abroad was surveyed in 669 college students. Students who studied abroad scored significantly higher on a Reentry Shock scale, reflecting skepticism toward U.S. culture, than those who did not. They were also more likely to consume alcohol. Study abroad had no detectable influence on students' romantic…

  13. Short Interest and Stock Returns

    OpenAIRE

    Paul Asquith; Pathak, Parag A.; Jay R. Ritter

    2004-01-01

    Using a longer time period and both NYSE-Amex and Nasdaq stocks, this paper examines short interest and stock returns in more detail than any previous study and finds that many documented patterns are not robust. While equally weighted high short interest portfolios generally underperform, value weighted portfolios do not. In addition, there is a negative correlation between market returns and short interest over our whole period. Finally, inferences from short time periods, such as 1988-1994...

  14. REVERSE LOGISTICS RETAIL LEVEL RETURN

    Directory of Open Access Journals (Sweden)

    Ivona Bajor

    2014-06-01

    Full Text Available Conducting scientific research regarding reverse logistics systems includes certain difficulties. Developed logistics systems are aimed at analysing reverse logistics issues and tend to continuously detect differences and oscillations in the flow of returned products and their characteristics. Developing logistics systems, as Croatian, find reverse logistics issues, regarding product returns, significantly complex and very often these issues are not observed as issues of priority. As distributive flow, reverse logistics systems fundaments should be also based on detailed analysis. Analysis in this flow presents amounts, reasons, process flows and quality of returned items. Because of complex product evaluation on individual level, reverse logistics procedures should be implemented as a methodology individually developed for every supply chain subject. This paper presents a research of retail level returns on the Croatian market, where the analysis implicated that the majority of products in return for this level is directed from final consumers and presents noncurrent inventories of distribution chain. The paper will present conducted research regarding characteristics of returns and routing these products from the retail level.

  15. Earnings Quality Measures and Excess Returns.

    Science.gov (United States)

    Perotti, Pietro; Wagenhofer, Alfred

    2014-06-01

    This paper examines how commonly used earnings quality measures fulfill a key objective of financial reporting, i.e., improving decision usefulness for investors. We propose a stock-price-based measure for assessing the quality of earnings quality measures. We predict that firms with higher earnings quality will be less mispriced than other firms. Mispricing is measured by the difference of the mean absolute excess returns of portfolios formed on high and low values of a measure. We examine persistence, predictability, two measures of smoothness, abnormal accruals, accruals quality, earnings response coefficient and value relevance. For a large sample of US non-financial firms over the period 1988-2007, we show that all measures except for smoothness are negatively associated with absolute excess returns, suggesting that smoothness is generally a favorable attribute of earnings. Accruals measures generate the largest spread in absolute excess returns, followed by smoothness and market-based measures. These results lend support to the widespread use of accruals measures as overall measures of earnings quality in the literature.

  16. The organisational perspective on the return to work of employees following treatment for cancer.

    Science.gov (United States)

    Grunfeld, Elizabeth A; Rixon, Lorna; Eaton, Emma; Cooper, Alethea F

    2008-12-01

    Due to improved survival rates across cancer types there is an ever increasing group of cancer survivors of working age with a unique set of needs associated with living with cancer and with returning to work. Little is known about the services provided for cancer survivors or the needs of organisations in the return to work process. This study aimed to provide this information through a survey of the organisational perspective of the return to work of cancer survivors. Questionnaires were sent to human resource or occupational health departments of 815 medium to large organisations. The questionnaire focussed on the companies' policies and procedures, their return to work services and beliefs about the experiences of cancer survivors returning to the workplace. 252 organisations returned completed questionnaires (response rate 31%). 48% of respondents were unable to provide information about the number of employees diagnosed with cancer in the past 12 months. A range of return to work services was provided although only 38% provided employees with written information or guidelines about return to work policies or services. Respondents tended to view employee related factors, such as employee attitude and emotional functioning, as key to a successful return to work. Organisations aim to be supportive of cancer survivors returning to the workplace and potentially offer a range of return to work services. However, employees may not be adequately informed of such services and a lack of information and clear communication may hinder a positive return to work experience.

  17. Sealed Planetary Return Canister (SPRC) Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Sample return missions have primary importance in future planetary missions. A basic requirement is that samples be returned in pristine, uncontaminated condition,...

  18. Sealed Planetary Return Canister (SPRC) Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Sample return missions have primary importance in future planetary missions. A basic requirement is that samples be returned in pristine, uncontaminated condition,...

  19. The return on investment for information technology.

    Science.gov (United States)

    Bergeron, B P; Bergeron, R A

    1998-01-01

    Investment in information technology accounts for an increasingly large component of the cost of modern health care. In most businesses, a quantitative return on investment analysis forms the basis for decisions regarding technology investment. As a whole, the medical community lags behind in the quantitative analysis of the benefits of information technology. However, economic pressures are forcing health care organizations to step back and understand the implications of technology investments and how they can best be applied to create a more productive staff and, in the end, better patient care.

  20. Strategies to Address Unmet Needs and Facilitate Return to Learn Guideline Adoption Following Concussion

    Science.gov (United States)

    Lyons, Vivian H.; Moore, Megan; Guiney, Roxanne; Ayyagari, Rajiv C.; Thompson, Leah; Rivara, Frederick P.; Fleming, Robin; Crawley, Deborah; Harper, Dawn; Vavilala, Monica S.

    2017-01-01

    Background: Many students do not receive return to learn (RTL) services upon return to academics following a concussion. Methods: Using a mixed-methods approach, we conducted a survey of RTL practices and experiences in Washington State schools between January 2015 and June 2015. We then held a statewide summit of RTL stakeholders and used a…

  1. Workplace Safety Concerns among Co-workers of Responder Returning from Ebola-Affected Country.

    Science.gov (United States)

    Chan, Benjamin P; Daly, Elizabeth R; Talbot, Elizabeth A

    2015-11-01

    We surveyed public health co-workers regarding attitudes toward a physician who returned to New Hampshire after volunteering in the West African Ebola outbreak. An unexpectedly large (18.0%) proportion of staff expressed discomfort with the Ebola responder returning to work. Employers should take proactive steps to address employee fears and concerns.

  2. Heterogeneity, Comparative Advantage, and Return to Education: The Case of Taiwan

    Science.gov (United States)

    Chuang, Yih-chyi; Lai, Wei-wen

    2010-01-01

    By considering heterogeneity in abilities and self-selection in educational choice, this paper adopts the heterogeneous human capital model to estimate rate of return to university education using data from the 1990 and 2000 Taiwan's Manpower Utilization Surveys. The Taiwan empirical study shows that significant heterogeneous return to education…

  3. Return to work following ileostomy.

    Science.gov (United States)

    Whates, P D; Irving, M

    1984-08-01

    The experiences of 1033 members of the 51 English divisions of the Ileostomy Association of Great Britain and Ireland have been analysed in respect of their return to work after construction of an ileostomy. Although there was a fall in the number of patients returning to work after operation this was often for reasons unrelated to surgery. The majority of those returning to work resumed work with the same employer and usually in the same post. Fifty-nine (5.7 per cent) patients began work for the first time after operation, including 33 (3.2 per cent) who were previously inactive although of working age. Analysis of occupational class shows that, although a number of patients initially resumed work within a lower class, once established in employment successful career advancement was possible. Problems in the gaining or resumption of employment were reported by 56 (5.4 per cent) patients. In 22 (2.1 per cent) patients, almost all approaching or above retirement age, successful surgery resulted in a decision not to return to employment. An ileostomy is no barrier to successful return to work in nearly all occupations, and is accomplished by the majority of patients without major difficulty.

  4. Long memory in the Croatian and Hungarian stock market returns

    Directory of Open Access Journals (Sweden)

    Silvo Dajčman

    2012-06-01

    Full Text Available The objective of this paper is to analyze and compare the fractal structure of the Croatian and Hungarian stock market returns. The presence of long memory components in asset returns provides evidence against the weak-form of stock market efficiency. The starting working hypothesis that there is no long memory in the Croatian and Hungarian stock market returns is tested by applying the Kwiatkowski-Phillips-Schmidt-Shin (KPSS (1992 test, Lo’s (1991 modified rescaled range (R/S test, and the wavelet ordinary least squares (WOLS estimator of Jensen (1999. The research showed that the WOLS estimator may lead to different conclusions regarding long memory presence in the stock returns from the KPSS and unit root tests or Lo’s R/S test. Furthermore, it proved that the fractal structure of individual stock returns may be masked in aggregated stock market returns (i.e. in returns of stock index. The main finding of the paper is that both the Croatian stock index Crobex and individual stocks in this index exhibit long memory. Long memory is identified for some stocks in the Hungarian stock market as well, but not for the stock market index BUX. Based on the results of the long memory tests, it can be concluded that while the Hungarian stock market is weakform efficient, the Croatian stock market is not.

  5. Return Radius and volume of recrystallized material in Ostwald Ripening

    CERN Document Server

    Hausser, Frank

    2012-01-01

    Within the framework of the LSW theory of Ostwald ripening the amount of volume of the second (solid) phase that is newly formed by recrystallization is investigated. It is shown, that in the late stage, the portion of the newly generated volume formed within an interval from time $t_0$ to $t$ is a certain function of $t/t_0$ and an explicit expression of this volume is given. To achieve this, we introduce the notion of the {\\it return radius} $r(t,t_0)$, which is the unique radius of a particle at time $t_0$ such that this particle has -- after growing and shrinking -- the same radius at time $t$. We derive a formula for the return radius which later on is used to obtain the newly formed volume. Moreover, formulas for the growth rate of the return radius and the recrystallized material at time $t_0$ are derived.

  6. Landsat 1-2 Return Beam Vidicon Film Only: 1972-1983

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The three-camera Return Beam Vidicon (RBV) that operated on Landsat satellites 1 and 2 acquired approximately 1600 sub-scenes at 80 meter resolution. The initial RBV...

  7. Landsat 1-2 Return Beam Vidicon Film Only: 1972-1983

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — The three-camera Return Beam Vidicon (RBV) that operated on Landsat satellites 1 and 2 acquired approximately 1600 sub-scenes at 80 meter resolution. The initial...

  8. The Influence of Migration Experience on Non-agriculture Employment of Returning Migrants: An Empirical Analysis Based on Survey in Yunfu City, Guangdong Province%外出务工经历对回流后劳动力非农就业的影响——基于广东省云浮市的实证研究

    Institute of Scientific and Technical Information of China (English)

    殷江滨; 李郇

    2012-01-01

    Mass migration movements from countryside to city have exerted an enormous influence to the allocation of resources and economic development in China since Reform and Opening-up. However, the structure of rural labor migration in China has transformed to a city-countryside bidirectional flow from a unidirectional one. This change will profoundly affect the economic development of rural districts in China. This study, using recent data of a peasant-household-survey in Yunfu Gty, explores what influence of the return of migration contributes to rural non-agriculture economic development by the way of establishing the Logistic model for non-agriculiurral employment behavior of rural labor. The empirical result shows that the returning workers, especially those who have a rich outside working experience and returned after the year of 2000, surely promote the development of rural non-farm industry. Those workers made an accumulation of human capital in the process of out-migration, which facilitated their participation in the non-agriculture economic development after their returning. As time goes by, the new migration workers have become the main body of out-migration. Under the new structure of migration, these features of rural laborers will promote them to shift to non-agriculture industry after their returning, and then promote the development of county economy in underdeveloped areas. Finally, we put forward corresponding suggestions according to the new trends of labor market.%改革开放以来,中国大规模的从农村向城镇的人口流动对资源的优化配置和经济快速发展产生了深远的影响.然而,中国的农村劳动力流动正逐渐从单向转变为城乡双向流动的格局,这一变化将课刻影响我国农村地区的发展前景.本文运用广东省西部山区云浮市的农户调查数据,通过构建Logistic非农就业决策模型,探讨劳动力回流对于农村地区非农就业发展的影响.实

  9. Maximizing LSST's Scientific Return: Ensuring Participation from Smaller Institutions

    CERN Document Server

    Liu, Charles T; Pepper, Joshua; Rutkowski, Michael; Norman, Dara; Cruz, Kelle; Bochanski, John; Lee, Hyun-chul; Isler, Jedidah; Gizis, John; Smith, J Allyn; Moustakas, John; Wehner, Elizabeth; Alfred, Marcus; McGruder, Charles; Hoffman, Jennifer L; Kwitter, Karen; Carini, Michael; Bary, Jeff; Covey, Kevin R; Finn, Rose; Penprase, Brian; Gelderman, Richard; Schuler, Simon

    2014-01-01

    The remarkable scientific return and legacy of LSST, in the era that it will define, will not only be realized in the breakthrough science that will be achieved with catalog data. This Big Data survey will shape the way the entire astronomical community advances -- or fails to embrace -- new ways of approaching astronomical research and data. In this white paper, we address the NRC template questions 4,5,6,8 and 9, with a focus on the unique challenges for smaller, and often under-resourced, institutions, including institutions dedicated to underserved minority populations, in the efficient and effective use of LSST data products to maximize LSST's scientific return.

  10. Abnormal Returns and Contrarian Strategies

    Directory of Open Access Journals (Sweden)

    Ivana Dall'Agnol

    2003-12-01

    Full Text Available We test the hypothesis that strategies which are long on portfolios of looser stocks and short on portfolios of winner stocks generate abnormal returns in Brazil. This type of evidence for the US stock market was interpreted by The Bondt and Thaler (1985 as reflecting systematic evaluation mistakes caused by investors overreaction to news related to the firm performance. We found evidence of contrarian strategies profitability for horizons from 3 months to 3 years in a sample of stock returns from BOVESPA and SOMA from 1986 to 2000. The strategies are more profitable for shorter horizons. Therefore, there was no trace of the momentum effect found by Jagadeesh and Titman (1993 for the same horizons with US data. There are remaing unexplained positive returns for contrarian strategies after accounting for risk, size, and liquidity. We also found that the strategy profitability is reduced after the Real Plan, which suggests that the Brazilian stock market became more efficient after inflation stabilization.

  11. Scaling and memory in volatility return intervals in financial markets

    Science.gov (United States)

    Yamasaki, Kazuko; Muchnik, Lev; Havlin, Shlomo; Bunde, Armin; Stanley, H. Eugene

    2005-06-01

    For both stock and currency markets, we study the return intervals τ between the daily volatilities of the price changes that are above a certain threshold q. We find that the distribution function Pq(τ) scales with the mean return interval [Formula] as [Formula]. The scaling function f(x) is similar in form for all seven stocks and for all seven currency databases analyzed, and f(x) is consistent with a power-law form, f(x) ˜ x-γ with γ ≈ 2. We also quantify how the conditional distribution Pq(τ|τ0) depends on the previous return interval τ0 and find that small (or large) return intervals are more likely to be followed by small (or large) return intervals. This “clustering” of the volatility return intervals is a previously unrecognized phenomenon that we relate to the long-term correlations known to be present in the volatility. Author contributions: S.H. and H.E.S. designed research; K.Y., L.M., S.H., and H.E.S. performed research; A.B. contributed new reagents/analytic tools; A.B. analyzed data; and S.H. wrote the paper.Abbreviations: pdf, probability density function; S&P 500, Standard and Poor's 500 Index; USD, U.S. dollar; JPY, Japanese yen; SEK, Swedish krona.

  12. Collaborative form(s)

    DEFF Research Database (Denmark)

    Gunn, Wendy

    Gunn asks us to consider beauty as collaborative forms of action generated by moving between design by means of anthropology and anthropology by means of design. Specifically, she gives focus to play-like reflexions on practices of designing energy products, systems and infrastructure. Design...

  13. Return of the Red Chips

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The mainland stock boom is drawing many profitable Hong Kong-listed Chinese companies back home September saw a wave of Hong Kong-listed Chinese companies returning to the mainland stock market,helping the Shanghai Stock Exchange surpass Hong Kong to become the sixth largest stock exchange in the world.

  14. Heat Pipe Blocks Return Flow

    Science.gov (United States)

    Eninger, J. E.

    1982-01-01

    Metal-foil reed valve in conventional slab-wick heat pipe limits heat flow to one direction only. With sink warmer than source, reed is forced closed and fluid returns to source side through annular transfer wick. When this occurs, wick slab on sink side of valve dries out and heat pipe ceases to conduct heat.

  15. The Return of the Old

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    @@ Daniel Bell's latest book,China's New Confucianism,is an in-depth look at how one of the Middle Kingdom's oldest and greatest traditions is gradually returning,and how a growing number of Chinese citizens are embracing its once-forgotten ideals.

  16. Return Migration of Foreign Students

    NARCIS (Netherlands)

    Bijwaard, G.E.; Wang, Q.

    2016-01-01

    Using administrative panel data, this paper presents a comprehensive empirical analysis of the return of recent foreign students in the Netherlands. We focus on how individual labour market changes and marriage formation influence their decision to leave. Our model allows for correlated unobserved h

  17. Language Skills and Economic Returns

    Science.gov (United States)

    Garrouste, Christelle

    2008-01-01

    This article focuses on the contributions from the emerging positivist epistemological approach, endorsed by the economics of language and the economics of education, to study the returns to language skills, assuming that language competencies constitute key components of human capital. It presents initial results from a study on economic returns…

  18. Return migration of foreign students

    NARCIS (Netherlands)

    Bijwaard, G.E.; Wang, Qi

    2013-01-01

    Using unique administrative micro panel data, this paper presents a comprehensive empirical analysis of the return of recent foreign students in The Netherlands. The life course experiences of these students in the host, both on the labour market and in marriage formation, impact their decision to

  19. Quality of life and discriminating power of two questionnaires in fibromyalgia patients: fibromyalgia Impact Questionnaire and Medical Outcomes Study 36-Item Short-Form Health Survey A qualidade de vida e o poder de discriminação de dois questionários em pacientes com fibromialgia: fibromyalgia Impact Questionnaire e Medical Outcomes Study 36-Item Short-Form Health Survey

    Directory of Open Access Journals (Sweden)

    Ana Assumpção

    2010-08-01

    Full Text Available BACKGROUND: Fibromyalgia is a painful syndrome characterized by widespread chronic pain and associated symptoms with a negative impact on quality of life. OBJECTIVES: Considering the subjectivity of quality of life measurements, the aim of this study was to verify the discriminating power of two quality of life questionnaires in patients with fibromyalgia: the generic Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36 and the specific Fibromyalgia Impact Questionnaire (FIQ. METHODS: A cross-sectional study was conducted on 150 participants divided into Fibromyalgia Group (FG and Control Group (CG (n=75 in each group. The participants were evaluated using the SF-36 and the FIQ. The data were analyzed by the Student t-test (α=0.05 and inferential analysis using the Receiver Operating Characteristics (ROC Curve - sensitivity, specificity and area under the curve (AUC. The significance level was 0.05. RESULTS: The sample was similar for age (CG: 47.8±8.1; FG: 47.0±7.7 years. A significant difference was observed in quality of life assessment in all aspects of both questionnaires (pCONTEXTUALIZAÇÃO: A fibromialgia é uma síndrome dolorosa caracterizada por dor espalhada e crônica e sintomas associados com um impacto negativo na qualidade de vida. OBJETIVOS: Considerando a subjetividade da mensuração de qualidade de vida, o objetivo deste estudo foi avaliar o poder de discriminação de dois questionários que avaliam a qualidade de vida de pacientes com fibromialgia: o genérico Medical Short Form Healthy Survey (SF-36 e o específico Questionário do Impacto da Fibromialgia (QIF. MÉTODOS: Foi conduzido um estudo transversal com 150 indivíduos, divididos em dois grupos: grupo fibromialgia (FM e grupo controle (GC (n=75 em ambos. Os pacientes foram avaliados pelo SF-36 e pelo QIF. Na análise dos dados, utilizou-se o teste "t de Student" com α=0,05 e a Curva ROC (Receiver Operating Characteristics Curve. RESULTADOS: As amostras

  20. Engineering surveying

    CERN Document Server

    Schofield, W

    2001-01-01

    The aim of Engineering Surveying has always been to impart and develop a clear understanding of the basic topics of the subject. The author has fully revised the book to make it the most up-to-date and relevant textbook available on the subject.The book also contains the latest information on trigonometric levelling, total stations and one-person measuring systems. A new chapter on satellites ensures a firm grasp of this vitally important topic.The text covers engineering surveying modules for civil engineering students on degree courses and forms a reference for the engineering surveying module in land surveying courses. It will also prove to be a valuable reference for practitioners.* Simple clear introduction to surveying for engineers* Explains key techniques and methods* Details reading systems and satellite position fixing

  1. 秸秆还田条件下稻田田面水不同形态氮动态变化特征研究%Study on dynamics of Nitrogen in different forms in surface water of paddy field under straw return

    Institute of Scientific and Technical Information of China (English)

    王静; 郭熙盛; 王允青; 吕国安

    2014-01-01

    In order to explore the effective tillage for reducing nitrogen losse and improving lake water qual-ity, field experiments were conducted to study the dynamics of TN (total nitrogen), DN (dissolved nitro-gen),DON (dissolved organic nitrogen),ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) concen-trations in surface water of paddy field in the Chaohu Lake region in two consecutive years. The results show that the concentrations of TN、DN、DON and NH4+-N in surface water reached the maximums after 2 or 4 days of urea application, then declined rapidly, and finally leveled off after 8~10 days. The NO3--N concentration remained at a low level during the whole rice growing seasons, although it showed a little raise after 4 or 6 days of urea application. Obviously, it is the critical period for controlling N loss from paddy field within 8~10 days after urea application. Straw return could effectively decrease the higher con-centrations of TN, DN and NH4+-N in surface water during the earlier stage, whereas the differences in DON concentration was not so significant. Therefore, straw return is beneficial for lowering the potential risk of N loss. Furthermore, DN was the predominant form of TN in surface water, which accounted for 63.2 %~88.8 % of the TN. Within 8 days after urea application, the proportion of NH4 +-N to TN was 33.8%~69.9%. DON was a significant component of TN in surface water,which suggested that its ecologi-cal and environmental effects should not be neglected. The results also show that the rice yields of CTS in-creased significantly by 12.25% and 7.68% compared with CT,which indicated that straw return could in-crease the rice yields. The findings indicate that assuring the production of rice yields, straw return ap-peared to be an effective measure for the source control of the nitrogen loss from paddy field in the Chao-hu Lake region.%为探索巢湖流域稻麦(油)轮作区水稻季减少农田氮素流失的有效耕作措施,降

  2. ALMA spectroscopic survey in the Hubble Ultra Deep Field: Continuum number counts, resolved 1.2-mm extragalactic background, and properties of the faintest dusty star forming galaxies

    CERN Document Server

    Aravena, Manuel; Walter, Fabian; Da Cunha, Elisabete; Bauer, Franz E; Carilli, Christopher; Daddi, Emanuele; Elbaz, David; Ivison, R J; Riechers, Dominik; Smail, Ian R; Swinbank, Mark; Weiss, Axel; Anguita, Timo; Assef, Roberto J; Bell, Eric; Bertoldi, Frank; Bacon, Roland; Bouwens, Rychard; Cortes, Paulo; Cox, Pierre; Gónzalez-López, Jorge; Hodge, Jacqueline; Ibar, Eduardo; Inami, Hanae; Infante, Leopoldo; Karim, Alexander; Fèvre, Olivier Le; Magnelli, Benjamin; Ota, Kauzuaki; Popping, Gergö; Sheth, Kartik; van der Werf, Paul; Wagg, Jeffrey

    2016-01-01

    We present an analysis of a deep (1$\\sigma$=13 $\\mu$Jy) cosmological 1.2-mm continuum map based on ASPECS, the ALMA Spectroscopic Survey in the Hubble Ultra Deep Field. In the 1 arcmin$^2$ covered by ASPECS we detect nine sources at $>3.5\\sigma$ significance at 1.2-mm. Our ALMA--selected sample has a median redshift of $z=1.6\\pm0.4$, with only one galaxy detected at z$>$2 within the survey area. This value is significantly lower than that found in millimeter samples selected at a higher flux density cut-off and similar frequencies. Most galaxies have specific star formation rates similar to that of main sequence galaxies at the same epoch, and we find median values of stellar mass and star formation rates of $4.0\\times10^{10}\\ M_\\odot$ and $\\sim40~M_\\odot$ yr$^{-1}$, respectively. Using the dust emission as a tracer for the ISM mass, we derive depletion times that are typically longer than 300 Myr, and we find molecular gas fractions ranging from $\\sim$0.1 to 1.0. As noted by previous studies, these values ar...

  3. Why we need asteroid sample return mission?

    Science.gov (United States)

    Barucci, Maria Antonietta

    2016-07-01

    Small bodies retain evidence of the primordial solar nebula and the earliest solar system processes that shaped their evolution. They may also contain pre-solar material as well as complex organic molecules, which could have a major role to the development of life on Earth. For these reasons, asteroids and comets have been targets of interest for missions for over three decades. However, our knowledge of these bodies is still very limited, and each asteroid or comet visited by space mission has revealed unexpected scientific results, e.g. the structure and nature of comet 67P/Churyumov-Gerasimenko (67P/C-G) visited by the Rosetta mission. Only in the laboratory can instruments with the necessary precision and sensitivity be applied to individual components of the complex mixture of materials that forms a small body regolith, to determine their precise chemical and isotopic composition. Such measurements are vital for revealing the evidence of stellar, interstellar medium, pre-solar nebula and parent body processes that are retained in primitive material, unaltered by atmospheric entry or terrestrial contamination. For those reasons, sample return missions are considered a high priority by a number of the leading space agencies. Abundant within the inner Solar System and the main impactors on terrestrial planets, small bodies may have been the principal contributors of the water and organic material essential to create life on Earth. Small bodies can therefore be considered to be equivalent to DNA for unravelling our solar system's history, offering us a unique window to investigate both the formation of planets and the origin of life. A sample return mission to a primitive Near-Earth Asteroid (NEA) has been study at ESA from 2008 in the framework of ESA's Cosmic Vision (CV) programme, with the objective to answer to the fundamental CV questions "How does the Solar System work?" and "What are the conditions for life and planetary formations?". The returned material

  4. Ratio K: a New Way of Metering and Evaluating the Risk and Return of Stock Investment

    Institute of Scientific and Technical Information of China (English)

    朱淑珍; 朱静怡

    2003-01-01

    Although widely used, both the Markowitz model and VAR (Value at Risk) model have some limitations in evaluating the risk and return of stock investnent.By the analysis of the conceptions of risk and return,together with the three hypotheses of technological analysis, a novelty model of metering and evaluating the risk and return of stock investnent is established.The major indicator of this model , risk-return ratio K, combines the characteristic indicators of risk and return. Regardless of the form of the risk-return probability density functions, this indicator K can always reflect the risk-return performances of the invested stocks clearly and accurately. How to use the model to make optimum investment and how to make portfolio combined with clustering analysis is also explained.

  5. OSIRIS-REx Asterod Sample Return Mission

    Science.gov (United States)

    Nakamura-Messinger, Keiki; Connolly, Harold C. Jr.; Messenger, Scott; Lauretta, Dante S.

    2017-01-01

    OSIRIS-REx is NASA's third New Frontiers Program mission, following New Horizons that completed a flyby of Pluto in 2015 and the Juno mission to Jupiter that has just begun science operations. The OSIRIS-REx mission's primary objective is to collect pristine surface samples of a carbonaceous asteroid and return to Earth for analysis. Carbonaceous asteroids and comets are 'primitive' bodies that preserved remnants of the Solar System starting materials and through their study scientists can learn about the origin and the earliest evolution of the Solar System. The OSIRIS-REx spacecraft was successfully launched on September 8, 2016, beginning its seven year journey to asteroid 101955 Bennu. The robotic arm will collect 60-2000 grams of material from the surface of Bennu and will return to Earth in 2023 for worldwide distribution by the Astromaterials Curation Facility at NASA Johnson Space Center. The name OSIRIS-REx embodies the mission objectives (1) Origins: Return and analyze a sample of a carbonaceous asteroid, (2) Spectral Interpretation: Provide ground-truth for remote observation of asteroids, (3) Resource Identification: Determine the mineral and chemical makeup of a near-Earth asteroid (4) Security: Measure the non-gravitational that changes asteroidal orbits and (5) Regolith Explorer: Determine the properties of the material covering an asteroid surface. Asteroid Bennu may preserve remnants of stardust, interstellar materials and the first solids to form in the Solar System and the molecular precursors to the origin of life and the Earth's oceans. Bennu is a potentially hazardous asteroid, with an approximately 1 in 2700 chance of impacting the Earth late in the 22nd century. OSIRIS-REx collects from Bennu will help formulate the types of operations and identify mission activities that astronauts will perform during their expeditions. Such information is crucial in preparing for humanity's next steps beyond low Earthy orbit and on to deep space

  6. The evolution of the stellar mass functions of star-forming and quiescent galaxies to z = 4 from the COSMOS/ultraVISTA survey

    DEFF Research Database (Denmark)

    Muzzin, Adam; Marchesini, Danilo; Stefano, Mauro

    2013-01-01

    We present measurements of the stellar mass functions (SMFs) of star-forming and quiescent galaxies to z = 4 using a sample of 95,675 Ks -selected galaxies in the COSMOS/UltraVISTA field. The SMFs of the combined population are in good agreement with previous measurements and show that the stella...

  7. INVESTOR SENTIMENT PROXIES AND PREDICTABILITY OF EQUITY RETURNS

    Directory of Open Access Journals (Sweden)

    Emrah KELEŞ

    2016-01-01

    Full Text Available Investor sentiment is one of the base on which behavioral models ground. Contrary to classical theories, these models offers empricial findings that irrational investors lead to over- or under-reactions, hence prices do not come back to fundamental levels. Investor sentiment is known as the unexplained beliefs of investors/traders in the market by facts in hand. Effects of sentiment is attractive therefore. Return predictability tests are convenient to measure these effects. In this study, we document a number of sentiment measures and argue the success of the representative indicators in terms of representing sentiment. This study that offers deep literature survey about sentiment proxies, reports closed-end fund discounts, Baker ve Wurgler composite sentiment index and surveys about consumer confidence/senti- ment in detail, and argue their predictive powers in return predictability. We aim to guide researchers in choice of investor sentiment proxies.

  8. Philopatry: A return to origins

    Science.gov (United States)

    Pearce, John M.

    2007-01-01

    The word “philopatry” is a combination of the prefix philo (from the Greekphilos, “beloved”) and the Latin patria, which means “fatherland” or “homeland.” Since the first English-language use of “philopatry” in an ornithological context by Huntington (1951), the term has been applied to two types of site-faithful behavior in birds. Closest to the etymological meaning is the first, “natal philopatry,” which means not dispersing far from, or returning to, a birthplace for reproduction. The second is “breeding philopatry,” which means returning to the same breeding area each year, though that area may not be an individual’s birth place (Shields 1982, Anderson et al. 1992). Therefore, any assessment of breeding philopatry likely includes some immigrant individuals, whereas assessments of natal philopatry include only locally hatched or born individuals.

  9. Returns to Tenure or Seniority?

    DEFF Research Database (Denmark)

    Buhai, Ioan Sebastian; Portela, Miguel; Teulings, Coen

    at the moment of separation). The LIFO rule provides a stronger bargaining position for senior workers, leading to a return to seniority in wages. Efficiency in hiring requires the workers' .bargaining power to be in line with their share in the cost of specific investment. Then, the LIFO rule is a way...... to protect their property right on the specific investment. We consider the effects of Employment Protection Legislation and risk aversion....

  10. On hull form of large deep-water seismic survey vessels%大型深水物探船船型研究

    Institute of Scientific and Technical Information of China (English)

    付学辉

    2015-01-01

    介绍国际上大型物探船的船型发展情况及其主要作业特点.结合我国近年新建的大型物探船,分析该船型在总布置、性能指标、谐波控制、水下噪声等方面的技术难点.%This paper introduces the major development and the main operation characteristics of the large seismic survey vessels in the world. Based on the vessels recently built in China, it analyzes the technique issues about general arrangement, ship performance, harmonic wave control and subsea noise.

  11. Input-form data for the U.S. Geological Survey assessment of the Mississippian Barnett Shale of the Bend Arch–Fort Worth Basin Province, 2015

    Science.gov (United States)

    Marra, Kristen R.; Charpentier, Ronald R.; Schenk, Christopher J.; Lewan, Michael D.; Leathers-Miller, Heidi M.; Klett, Timothy R.; Gaswirth, Stephanie B.; Le, Phuong A.; Mercier, Tracey J.; Pitman, Janet K.; Tennyson, Marilyn E.

    2016-07-15

    In 2015, the U.S. Geological Survey (USGS) released an updated assessment of undiscovered, technically recoverable shale gas and shale oil resources of the Mississippian Barnett Shale in north-central Texas (Marra and others, 2015). The Barnett Shale was assessed using the standard continuous (unconventional) methodology established by the USGS for two assessment units (AUs): (1) Barnett Continuous Gas AU, and (2) Barnett Mixed Continuous Gas and Oil AU. A third assessment unit, the Western Barnett Continuous Oil AU, was also defined but was not quantitatively assessed because of limited data within the extent of the AU. The purpose of this report is to provide supplemental documentation of the quantitative input parameters applied in the Barnett Shale assessment.

  12. Dynamic Trading with Predictable Returns and Transaction Costs

    DEFF Research Database (Denmark)

    Gârleanu, Nicolae; Heje Pedersen, Lasse

    2013-01-01

    We derive a closed-form optimal dynamic portfolio policy when trading is costly and security returns are predictable by signals with different mean-reversion speeds. The optimal strategy is characterized by two principles: (1) aim in front of the target, and (2) trade partially toward the current...

  13. Dynamic Trading with Predictable Returns and Transaction Costs

    DEFF Research Database (Denmark)

    Garleanu, Nicolae; Heje Pedersen, Lasse

    We derive a closed-form optimal dynamic portfolio policy when trading is costly and security returns are predictable by signals with dierent mean-reversion speeds.The optimal strategy is characterized by two principles: 1) aim in front of the target and 2) trade partially towards the current aim...

  14. Tick size and stock returns

    Science.gov (United States)

    Onnela, Jukka-Pekka; Töyli, Juuso; Kaski, Kimmo

    2009-02-01

    Tick size is an important aspect of the micro-structural level organization of financial markets. It is the smallest institutionally allowed price increment, has a direct bearing on the bid-ask spread, influences the strategy of trading order placement in electronic markets, affects the price formation mechanism, and appears to be related to the long-term memory of volatility clustering. In this paper we investigate the impact of tick size on stock returns. We start with a simple simulation to demonstrate how continuous returns become distorted after confining the price to a discrete grid governed by the tick size. We then move on to a novel experimental set-up that combines decimalization pilot programs and cross-listed stocks in New York and Toronto. This allows us to observe a set of stocks traded simultaneously under two different ticks while holding all security-specific characteristics fixed. We then study the normality of the return distributions and carry out fits to the chosen distribution models. Our empirical findings are somewhat mixed and in some cases appear to challenge the simulation results.

  15. Situation Still Grim, Company Confidence Return Analysis for Entrepreneur Questionaire

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    To better understand the current situation of China textile industry and the enterprisesdemand,China Textile Entrepreneur Association joined hands with China Textile StatisticsCenter to make a questionaire survey on the executives of textile mills and manufacturers atthe end of Dec.2008.More than 100 questionaries were returned by the end of Jan.2009.123 of them were reviewed and analyzed.Here below are the key points:

  16. Return to physical activity after gastrocnemius recession

    Science.gov (United States)

    Tang Qian Ying, Camelia; Lai Wei Hong, Sean; Lee, Bing Howe; Thevendran, Gowreeson

    2016-01-01

    AIM To prospectively investigate the time taken and patients’ ability to resume preoperative level of physical activity after gastrocnemius recession. METHODS Endoscopic gastrocnemius recession (EGR) was performed on 48 feet in 46 consecutive sportspersons, with a minimum follow-up of 24 mo. The Halasi Ankle Activity Score was used to quantify the level of physical activity. Time taken to return to work and physical activity was recorded. Functional outcomes were evaluated using the short form 36 (SF-36), American Orthopedic Foot and Ankle Society (AOFAS) Hindfoot score and modified Olerud and Molander (O and M) scores respectively. Patient’s satisfaction and pain experienced were assessed using a modified Likert scale and visual analogue scales. P-value 2 were able to resume their preoperative level of physical activity in mean time of 8.8 mo, as compared to 86% (n = 19) of patients whose activity score was ≤ 2, with mean time of 6.1 mo. Significant improvements were noted in SF-36, AOFAS hindfoot and modified O and M scores. Ninety percent of all patients rated good or very good outcomes on the Likert scale. CONCLUSION The majority of patients were able to return to their pre-operative level of sporting activity after EGR. PMID:27900272

  17. The Evolution of the Stellar Mass Functions of Star-Forming and Quiescent Galaxies to z = 4 from the COSMOS/UltraVISTA Survey

    CERN Document Server

    Muzzin, Adam; Stefanon, Mauro; Franx, Marijn; McCracken, Henry J; Milvang-Jensen, Bo; Dunlop, James S; Fynbo, J P U; Fevre, Olivier Le; Brammer, Gabriel; Labbe, Ivo

    2013-01-01

    We present measurements of the stellar mass functions (SMFs) of star-forming and quiescent galaxies to z = 4 using a sample of 95 675 galaxies in the COSMOS/UltraVISTA field. Sources have been selected from the DR1 UltraVISTA K_{s}-band imaging which covers a unique combination of a wide area (1.62 deg^2), to a significant depth (K_{s,tot} = 23.4). The SMFs of the combined population are in good agreement with previous measurements and show that the stellar mass density of the universe was only 50%, 10% and 1% of its current value at z ~ 1.0, 2.0, and 3.5, respectively. The quiescent population drives most of the overall growth, with the stellar mass density of these galaxies increasing by 2.71^{+0.93}_{-0.22} dex since z = 3.5. At z > 2.5, star-forming galaxies dominate the total SMF at all stellar masses, although a nonzero population of quiescent galaxies persists to z = 4. Comparisons of the K_{s}-selected star-forming galaxy SMFs to UV-selected SMFs at 2.5 3.5. We estimate the average mass growth of ind...

  18. The FMOS-COSMOS survey of star-forming galaxies at z~1.6. IV: Excitation state and chemical enrichment of HII regions

    CERN Document Server

    Kashino, D; Sanders, D; Kartaltepe, J S; Daddi, E; Renzini, A; Valentino, F; Rodighiero, G; Juneau, S; Kewley, L J; Zahid, H J; Arimoto, N; Nagao, T; Chu, J; Sugiyama, N; Civano, F; Ilbert, O; Kajisawa, M; Fevre, O Le; Maier, C; Onodera, M; Puglisi, A; Taniguchi, Y; COSMOS,

    2016-01-01

    We present results on the physical conditions of the interstellar medium of star-forming galaxies at 1.410^11Msun being well sampled. The excitation state and chemical enrichment of the ionized gas are investigated using diagnostic diagrams based on the ratios of emission line strengths, including Alpha, [NII]6584, [SII]6717,6731, Hbeta, and [OIII]5007. Our data confirm an offset of the star-forming sequence on the BPT diagram ([OIII]/Hbeta vs. [NII]/Halpha), primarily towards higher [OIII]/Hbeta, compared with local star-forming galaxies. Based on the [SII] ratio, we measure an electron density (n_e=222^{+172}_{-128} cm^-3), higher than that of local galaxies. Overall, these changes in emission-line properties are due to a higher ionization parameter in high redshift galaxies as demonstrated by a lower than expected [SII]/Halpha ratio and a comparison to theoretical models. These results likely rule out an offset in the BPT diagram caused by a harder radiation field or AGN as assessed with Chandra. Finally, ...

  19. The MOSDEF Survey: Detection of [OIII]$\\lambda$4363 and the direct-method oxygen abundance of a star-forming galaxy at z=3.08

    CERN Document Server

    Sanders, Ryan L; Kriek, Mariska; Reddy, Naveen A; Freeman, William R; Coil, Alison L; Siana, Brian; Mobasher, Bahram; Shivaei, Irene; Price, Sedona H; de Groot, Laura

    2016-01-01

    We present measurements of the electron-temperature based oxygen abundance for a highly star-forming galaxy at z=3.08, COSMOS-1908. This is the highest redshift at which [OIII]$\\lambda$4363 has been detected, and the first time that this line has been measured at z>2. We estimate an oxygen abundance of 12+log(O/H)$=8.00^{+0.13}_{-0.14}$. This galaxy is a low-mass ($10^{9.3}$ M$_{\\odot}$), highly star-forming ($\\sim50$ M$_{\\odot}$ yr$^{-1}$) system that hosts a young stellar population ($\\sim160$ Myr). We investigate the physical conditions of the ionized gas in COSMOS-1908 and find that this galaxy has a high ionization parameter, little nebular reddening ($E(B-V)_{\\rm gas}<0.14$), and a high electron density ($n_e\\sim500$ cm$^{-3}$). We compare the ratios of strong oxygen, neon, and hydrogen lines to the direct-method oxygen abundance for COSMOS-1908 and additional star-forming galaxies at z=0-1.8 with [OIII]$\\lambda$4363 measurements, and show that galaxies at z$\\sim$1-3 follow the same strong-line corre...

  20. 26 CFR 301.6103(i)-1 - Disclosure of returns and return information (including taxpayer return information) to and by...

    Science.gov (United States)

    2010-04-01

    ... (including taxpayer return information) to and by officers and employees of the Department of Justice or... investigation, involving enforcement of Federal criminal statute not involving tax administration. 301.6103(i)-1...) PROCEDURE AND ADMINISTRATION PROCEDURE AND ADMINISTRATION Information and Returns Returns and Records §...

  1. THE METALLICITY EVOLUTION OF STAR-FORMING GALAXIES FROM REDSHIFT 0 TO 3: COMBINING MAGNITUDE-LIMITED SURVEY WITH GRAVITATIONAL LENSING

    Energy Technology Data Exchange (ETDEWEB)

    Yuan, T.-T.; Kewley, L. J. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Richard, J. [CRAL, Observatoire de Lyon, Universite Lyon 1, 9 Avenue Charles Andre, F-69561 Saint Genis Laval Cedex (France)

    2013-01-20

    We present a comprehensive observational study of the gas-phase metallicity of star-forming galaxies from z {approx} 0 {yields} 3. We combine our new sample of gravitationally lensed galaxies with existing lensed and non-lensed samples to conduct a large investigation into the mass-metallicity (MZ) relation at z > 1. We apply a self-consistent metallicity calibration scheme to investigate the metallicity evolution of star-forming galaxies as a function of redshift. The lensing magnification ensures that our sample spans an unprecedented range of stellar mass (3 Multiplication-Sign 10{sup 7} to 6 Multiplication-Sign 10{sup 10} M {sub Sun }). We find that at the median redshift of z = 2.07, the median metallicity of the lensed sample is 0.35 dex lower than the local SDSS star-forming galaxies and 0.18 dex lower than the z {approx} 0.8 DEEP2 galaxies. We also present the z {approx} 2 MZ relation using 19 lensed galaxies. A more rapid evolution is seen between z {approx} 1 {yields} 3 than z {approx} 0 {yields} 1 for the high-mass galaxies (10{sup 9.5} M {sub Sun} < M {sub *} < 10{sup 11} M {sub Sun }), with almost twice as much enrichment between z {approx} 1 {yields} 3 than between z {approx} 1 {yields} 0. We compare this evolution with the most recent cosmological hydrodynamic simulations with momentum-driven winds. We find that the model metallicity is consistent with the observed metallicity within the observational error for the low-mass bins. However, for higher masses, the model overpredicts the metallicity at all redshifts. The overprediction is most significant in the highest mass bin of 10{sup 10}-10{sup 11} M {sub Sun }.

  2. THE EVOLUTION OF THE STELLAR MASS FUNCTIONS OF STAR-FORMING AND QUIESCENT GALAXIES TO z = 4 FROM THE COSMOS/UltraVISTA SURVEY

    Energy Technology Data Exchange (ETDEWEB)

    Muzzin, Adam; Franx, Marijn; Labbé, Ivo [Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden (Netherlands); Marchesini, Danilo [Department of Physics and Astronomy, Tufts University, Medford, MA 06520 (United States); Stefanon, Mauro [Physics and Astronomy Department, University of Missouri, Columbia, MO 65211 (United States); McCracken, Henry J. [Institut d' Astrophysique de Paris, UMR7095 CNRS, Université Pierre et Marie Curie, 98 bis Boulevard Arago, F-75014 Paris (France); Milvang-Jensen, Bo; Fynbo, J. P. U. [Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen (Denmark); Dunlop, James S. [SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom); Brammer, Gabriel [European Southern Observatory, Alonso de Córdova 3107, Casilla 19001, Vitacura, Santiago (Chile); Van Dokkum, Pieter G. [Department of Astronomy, Yale University, New Haven, CT 06520-8101 (United States)

    2013-11-01

    We present measurements of the stellar mass functions (SMFs) of star-forming and quiescent galaxies to z = 4 using a sample of 95,675 K{sub s} -selected galaxies in the COSMOS/UltraVISTA field. The SMFs of the combined population are in good agreement with previous measurements and show that the stellar mass density of the universe was only 50%, 10%, and 1% of its current value at z ∼ 0.75, 2.0, and 3.5, respectively. The quiescent population drives most of the overall growth, with the stellar mass density of these galaxies increasing as ρ{sub star}∝(1 + z){sup –4.7±0.4} since z = 3.5, whereas the mass density of star-forming galaxies increases as ρ{sub star}∝(1 + z){sup –2.3±0.2}. At z > 2.5, star-forming galaxies dominate the total SMF at all stellar masses, although a non-zero population of quiescent galaxies persists to z = 4. Comparisons of the K{sub s} -selected star-forming galaxy SMFs with UV-selected SMFs at 2.5 < z < 4 show reasonable agreement and suggest that UV-selected samples are representative of the majority of the stellar mass density at z > 3.5. We estimate the average mass growth of individual galaxies by selecting galaxies at fixed cumulative number density. The average galaxy with log(M{sub star}/M{sub ☉}) = 11.5 at z = 0.3 has grown in mass by only 0.2 dex (0.3 dex) since z = 2.0 (3.5), whereas those with log(M{sub star}/M{sub ☉}) = 10.5 have grown by >1.0 dex since z = 2. At z < 2, the time derivatives of the mass growth are always larger for lower-mass galaxies, which demonstrates that the mass growth in galaxies since that redshift is mass-dependent and primarily bottom-up. Lastly, we examine potential sources of systematic uncertainties in the SMFs and find that those from photo-z templates, stellar population synthesis modeling, and the definition of quiescent galaxies dominate the total error budget in the SMFs.

  3. A Four Year Follow-Up of Non-Returning Students at Montgomery College.

    Science.gov (United States)

    Gell, Robert L.; And Others

    An annual survey of non-returning Montgomery College students from the years 1971 to 1973 was conducted in order to examine reasons for choosing to leave the college, identify trends, determine the status of students at the time of the survey, and assess the impact of their college experience on current activities. The 454 usable responses (20…

  4. MASSIV: Mass Assembly Survey with SINFONI in VVDS. III. Evidence for positive metallicity gradients in z~1.2 star-forming galaxies

    CERN Document Server

    Queyrel, J; Kissler-Patig, M; Epinat, B; Amram, P; Garilli, B; Fevre, O Le; Moultaka, J; Paioro, L; Tasca, L; Tresse, L; Vergani, D; Lopez-Sanjuan, C; Perez-Montero, E

    2011-01-01

    A key open issue for galaxy evolution and formation models is the understanding of the different mechanisms of galaxy assembly at various cosmic epochs. The aim of this study is to derive the global and spatially-resolved metal content in high-redshift galaxies. Using VLT/SINFONI IFU spectroscopy of a first sample of 50 galaxies at z~1.2 in the MASSIV survey, we are able to measure the Ha and [NII]6584 emission lines. Using the N2 ratio as a proxy for oxygen abundance in the interstellar medium, we measure the metallicity of the sample galaxies. We develop a tool to extract spectra in annular regions of these galaxies, leading to a spatially-resolved estimate of the oxygen abundance in each galaxy. We derive a metallicity gradient for 26 galaxies in our sample and discover a significant fraction of galaxies with a "positive" gradient. Using a simple chemical evolution model, we derive infall rates of pristine gas onto the disks. Seven galaxies display a positive gradient at a high confidence level. Four out o...

  5. A Weak Lensing Study of X-ray Groups in the COSMOS survey: Form and Evolution of the Mass-Luminosity Relation

    CERN Document Server

    Leauthaud, A; Taylor, J E; Massey, R; Rhodes, J; Ilbert, O; Bundy, K; Tinker, J; George, M R; Capak, P; Koekemoer, A M; Johnston, D E; Cappelluti, N; Ellis, Richard S; Elvis, M; Heymans, C; Le Fèvre, O; Lilly, S; McCraken, H J; Mellier, Y; Réfrégier, A; Salvato, M; Scoville, N; Smoot, G; Tanaka, M; Van Waerbeke, L; Wolk, M

    2009-01-01

    Measurements of X-ray scaling laws are critical for improving cosmological constraints derived with the halo mass function and for understanding the physical processes that govern the heating and cooling of the intracluster medium. In this paper, we use a sample of 206 X-ray selected galaxy groups to investigate the scaling relation between X-ray luminosity (Lx) and halo mass (M00) where M200 is derived via stacked weak gravitational lensing. This work draws upon a broad array of multi-wavelength COSMOS observations including 1.64 square degrees of contiguous imaging with the Advanced Camera for Surveys (ACS) and deep XMM-Newton/Chandra imaging. The combined depth of these two data-sets allows us to probe the lensing signals of X-ray detected structures at both higher redshifts and lower masses than previously explored. Weak lensing profiles and halo masses are derived for nine sub-samples, narrowly binned in luminosity and redshift. The COSMOS data alone are well fit by a power law, M200 ~ Lx^a, with a slope...

  6. The 12-item medical outcomes study short form health survey version 2.0 (SF-12v2: a population-based validation study from Tehran, Iran

    Directory of Open Access Journals (Sweden)

    Omidvari Sepideh

    2011-03-01

    Full Text Available Abstract Background The SF-12v2 is the improved version of the SF-12v1. This study aimed to validate the SF-12v2 in Iran. Methods A random sample of the general population aged 18 years and over living in Tehran, Iran completed the instrument. Reliability was estimated using internal consistency and validity was assessed using known-groups comparison and convergent validity. In addition the factor structure of the questionnaire was extracted by performing both exploratory and confirmatory factor analyses (EFA and CFA. Results In all, 3685 individuals were studied (1887male and 1798 female. Internal consistency for both summary measures was satisfactory. Cronbach's α for the Physical Component Summary (PCS-12 was 0.87 and for the Mental Component Summary (MCS-12 it was 0.82. Known-groups comparison showed that the SF-12v2 discriminated well between men and women and those who differed in age and educational status (P Conclusion Although the findings could not be generalized to the Iranian population, overall the findings suggest that the SF-12v2 is a reliable and valid measure of health related quality of life among Iranians and now could be used in future health outcome studies. However, further studies are recommended to establish its stability, responsiveness to change, and concurrent validity for this health survey in Iran.

  7. A VLT spectroscopic survey of RX J0152.7-1357, a forming cluster of galaxies at z=0.837

    CERN Document Server

    Demarco, R; Lidman, C E; Homeier, N L; Scannapieco, E; Benítez, N; Mainieri, V; Nonino, M; Girardi, M; Stanford, S A; Tozzi, P; Borgani, S; Silk, J; Squires, G; Broadhurst, T J

    2004-01-01

    We present the results of an extensive spectroscopic survey of RX J0152.7-1357, one of the most massive distant clusters of galaxies known. Multi-object spectroscopy, carried out with FORS1 and FORS2 on the ESO Very Large Telescope (VLT), has allowed us to measure more than 200 redshifts in the cluster field and to confirm 102 galaxies as cluster members. The mean redshift of the cluster is $z=0.837 \\pm 0.001$ and we estimate the velocity dispersion of the overall cluster galaxy distribution to be $\\sim 1600 \\mathrm{km \\ s^{-1}}$. The distribution of cluster members is clearly irregular, with two main clumps that follow the X-ray cluster emission mapped by Chandra. A third clump of galaxies to the east of the central structure and at the cluster redshift has also been identified. The two main clumps have velocity dispersions of $\\sim919$ and $\\sim737 \\mathrm{km s^{-1}}$ respectively, and the peculiar velocity of the two clumps suggests that they will merge into a single more massive cluster. A segregation in ...

  8. Discovering extremely compact and metal-poor, star-forming dwarf galaxies out to z ~ 0.9 in the VIMOS Ultra-Deep Survey

    CERN Document Server

    Amorín, Ricardo; Castellano, M; Grazian, A; Tasca, L A M; Fontana, A; Pentericci, L; Cassata, P; Garilli, B; Brun, V Le; Fèvre, O Le; Maccagni, D; Thomas, R; Vanzella, E; Zamorani, G; Zucca, E; Bardelli, S; Capak, P; Cassará, L; Cimatti, A; Cuby, J G; Cucciati, O; de la Torre, S; Durkalec, A; Giavalisco, M; Hathi, N P; Ilbert, O; Lemaux, B C; Moreau, C; Paltani, S; Ribeiro, B; Salvato, M; Schaerer, D; Scodeggio, M; Talia, M; Taniguchi, Y; Tresse, L; Vergani, D; Wang, P W; Charlot, S; Contini, T; Fotopoulou, S; López-Sanjuan, C; Mellier, Y; Scoville, N

    2014-01-01

    We report the discovery of 31 low-luminosity (-14.5 < M_{AB}(B) < -18.8), extreme emission line galaxies (EELGs) at 0.3 < z < 0.9 identified by their unusually high rest-frame equivalent widths (100 < EW[OIII] < 1700 A) as part of the VIMOS Ultra Deep Survey (VUDS). VIMOS optical spectra of unprecedented sensitivity ($I_{AB}$ ~ 25 mag) along with multiwavelength photometry and HST imaging are used to investigate spectrophotometric properties of this unique sample and explore, for the first time, the very low stellar mass end (M* < 10^8 M$_{\\odot}$) of the luminosity-metallicity (LZR) and mass-metallicity (MZR) relations at z < 1. Characterized by their extreme compactness (R50 < 1 kpc), low stellar mass and enhanced specific star formation rates (SFR/M* ~ 10^{-9} - 10^{-7} yr^{-1}), the VUDS EELGs are blue dwarf galaxies likely experiencing the first stages of a vigorous galaxy-wide starburst. Using T_e-sensitive direct and strong-line methods, we find that VUDS EELGs are low-metall...

  9. Circular job-related spatial mobility in Germany:Comparative analyses of two representative surveys on the forms, prevalence and relevance in the context of partnership and family development

    Directory of Open Access Journals (Sweden)

    Heiko Rüger

    2012-01-01

    In this regard, the present article aims at achieving three essential objectives. First, we will introduce a common indicator for circular job mobility patterns found in the two surveys. On the basis of this common indicator, we will comparatively analyse the prevalence of different mobility forms and their composition according to key socio-demographic characteristics. In addition, we will use multivariate analyses to illustrate the relevance of job mobility for partnership and family development. Results suggest mobility patterns to be an important individual context factor when explaining processes relevant to partnerships and family. In particular, women who exhibit some degree of job mobility are less often married and rarely have children.

  10. Quantifying Stock Return Distributions in Financial Markets.

    Science.gov (United States)

    Botta, Federico; Moat, Helen Susannah; Stanley, H Eugene; Preis, Tobias

    2015-01-01

    Being able to quantify the probability of large price changes in stock markets is of crucial importance in understanding financial crises that affect the lives of people worldwide. Large changes in stock market prices can arise abruptly, within a matter of minutes, or develop across much longer time scales. Here, we analyze a dataset comprising the stocks forming the Dow Jones Industrial Average at a second by second resolution in the period from January 2008 to July 2010 in order to quantify the distribution of changes in market prices at a range of time scales. We find that the tails of the distributions of logarithmic price changes, or returns, exhibit power law decays for time scales ranging from 300 seconds to 3600 seconds. For larger time scales, we find that the distributions tails exhibit exponential decay. Our findings may inform the development of models of market behavior across varying time scales.

  11. The PEP Survey: evidence for intense star-forming activity in the majority of radio-selected AGN at z>~1

    CERN Document Server

    Magliocchetti, Manuela; Santini, Paola; Salvato, Mara; Popesso, Paola; Berta, Stefano; Pozzi, Francesca

    2015-01-01

    In order to investigate the FIR properties of radio-active AGN, we have considered three different fields where both radio and FIR observations are the deepest to-date: GOODS-South, GOODS-North and the Lockman Hole. Out of a total of 92 radio-selected AGN, ~64% are found to have a counterpart in Herschel maps. The percentage is maximum in the GOODS-North (72%) and minimum (~50%) in the Lockman Hole, where FIR observations are shallower. Our study shows that in all cases FIR emission is associated to star-forming activity within the host galaxy. Such an activity can even be extremely intense, with star-forming rates as high as ~10^3-10^4 Msun/yr. AGN activity does not inhibit star formation in the host galaxy, just as on-site star-formation does not seem to affect AGN properties, at least those detected at radio wavelengths and for z>~1. Furthermore, physical properties such as the mass and age distributions of the galaxies hosting a radio-active AGN do not seem to be affected by the presence of an ongoing sta...

  12. The ALHAMBRA survey : $B-$band luminosity function of quiescent and star-forming galaxies at $0.2 \\leq z < 1$ by PDF analysis

    CERN Document Server

    López-Sanjuan, C; Benítez, N; Molino, A; Viironen, K; Díaz-García, L A; Fernández-Soto, A; Santos, W A; Varela, J; Cenarro, A J; Moles, M; Arnalte-Mur, P; Ascaso, B; Montero-Dorta, A D; Pović, M; Martínez, V J; Nieves-Seoane, L; Stefanon, M; Hurtado-Gil, Ll; Márquez, I; Perea, J; Aguerri, J A L; Alfaro, E; Aparicio-Villegas, T; Broadhurst, T; Cabrera-Caño, J; Castander, F J; Cepa, J; Cerviño, M; Cristóbal-Hornillos, D; Delgado, R M González; Husillos, C; Infante, L; Masegosa, J; del Olmo, A; Prada, F; Quintana, J M

    2016-01-01

    Our goal is to study the evolution of the $B-$band luminosity function (LF) since $z=1$ using ALHAMBRA data. We used the photometric redshift and the $I-$band selection magnitude probability distribution functions (PDFs) of those ALHAMBRA galaxies with $I\\leq24$ mag to compute the posterior LF. We statistically studied quiescent and star-forming galaxies using the template information encoded in the PDFs. The LF covariance matrix in redshift-magnitude-galaxy type space was computed, including the cosmic variance. That was estimated from the intrinsic dispersion of the LF measurements in the 48 ALHAMBRA sub-fields. The uncertainty due to the photometric redshift prior is also included in our analysis. We modelled the LF with a redshift-dependent Schechter function affected by the same selection effects than the data. The measured ALHAMBRA LF at $0.2\\leq z<1$ and the evolving Schechter parameters both for quiescent and star-forming galaxies agree with previous results in the literature. The estimated redshif...

  13. Heterogeneity in Schooling Rates of Return

    Science.gov (United States)

    Henderson, Daniel J.; Polachek, Solomon W.; Wang, Le

    2011-01-01

    This paper relaxes the assumption of homogeneous rates of return to schooling by employing nonparametric kernel regression. This approach allows us to examine the differences in rates of return to education both across and within groups. Similar to previous studies we find that on average blacks have higher returns to education than whites,…

  14. The newsboy problem with resalable returns

    NARCIS (Netherlands)

    J.A.M. Mostard (Julien); R.H. Teunter (Ruud)

    2003-01-01

    textabstractWe analyze a newsboy problem with resalable returns. A single order is placed before the selling season starts. Purchased products may be returned by the customer for a full refund within a certain time interval. Returned products are resalable, provided they arrive back before the end o

  15. The Newsboy Problem with Resalable Returns

    NARCIS (Netherlands)

    J. Mostard (Julien); R.H. Teunter (Ruud)

    2002-01-01

    textabstractWe analyze a newsboy problem with resalable returns. A single order is placed before the selling season starts. Purchased products may be returned by the customer for a full refund within a certain time interval. Returned products are resalable, provided they arrive back before the end o

  16. Return Predictability, Model Uncertainty, and Robust Investment

    DEFF Research Database (Denmark)

    Lukas, Manuel

    Stock return predictability is subject to great uncertainty. In this paper we use the model confidence set approach to quantify uncertainty about expected utility from investment, accounting for potential return predictability. For monthly US data and six representative return prediction models, we...

  17. The Skeleton Forming Proteome of an Early Branching Metazoan: A Molecular Survey of the Biomineralization Components Employed by the Coralline Sponge Vaceletia Sp.

    Science.gov (United States)

    Germer, Juliane; Mann, Karlheinz; Wörheide, Gert; Jackson, Daniel John

    2015-01-01

    The ability to construct a mineralized skeleton was a major innovation for the Metazoa during their evolution in the late Precambrian/early Cambrian. Porifera (sponges) hold an informative position for efforts aimed at unraveling the origins of this ability because they are widely regarded to be the earliest branching metazoans, and are among the first multi-cellular animals to display the ability to biomineralize in the fossil record. Very few biomineralization associated proteins have been identified in sponges so far, with no transcriptome or proteome scale surveys yet available. In order to understand what genetic repertoire may have been present in the last common ancestor of the Metazoa (LCAM), and that may have contributed to the evolution of the ability to biocalcify, we have studied the skeletal proteome of the coralline demosponge Vaceletia sp. and compare this to other metazoan biomineralizing proteomes. We bring some spatial resolution to this analysis by dividing Vaceletia's aragonitic calcium carbonate skeleton into "head" and "stalk" regions. With our approach we were able to identify 40 proteins from both the head and stalk regions, with many of these sharing some similarity to previously identified gene products from other organisms. Among these proteins are known biomineralization compounds, such as carbonic anhydrase, spherulin, extracellular matrix proteins and very acidic proteins. This report provides the first proteome scale analysis of a calcified poriferan skeletal proteome, and its composition clearly demonstrates that the LCAM contributed several key enzymes and matrix proteins to its descendants that supported the metazoan ability to biocalcify. However, lineage specific evolution is also likely to have contributed significantly to the ability of disparate metazoan lineages to biocalcify.

  18. The Skeleton Forming Proteome of an Early Branching Metazoan: A Molecular Survey of the Biomineralization Components Employed by the Coralline Sponge Vaceletia Sp.

    Directory of Open Access Journals (Sweden)

    Juliane Germer

    Full Text Available The ability to construct a mineralized skeleton was a major innovation for the Metazoa during their evolution in the late Precambrian/early Cambrian. Porifera (sponges hold an informative position for efforts aimed at unraveling the origins of this ability because they are widely regarded to be the earliest branching metazoans, and are among the first multi-cellular animals to display the ability to biomineralize in the fossil record. Very few biomineralization associated proteins have been identified in sponges so far, with no transcriptome or proteome scale surveys yet available. In order to understand what genetic repertoire may have been present in the last common ancestor of the Metazoa (LCAM, and that may have contributed to the evolution of the ability to biocalcify, we have studied the skeletal proteome of the coralline demosponge Vaceletia sp. and compare this to other metazoan biomineralizing proteomes. We bring some spatial resolution to this analysis by dividing Vaceletia's aragonitic calcium carbonate skeleton into "head" and "stalk" regions. With our approach we were able to identify 40 proteins from both the head and stalk regions, with many of these sharing some similarity to previously identified gene products from other organisms. Among these proteins are known biomineralization compounds, such as carbonic anhydrase, spherulin, extracellular matrix proteins and very acidic proteins. This report provides the first proteome scale analysis of a calcified poriferan skeletal proteome, and its composition clearly demonstrates that the LCAM contributed several key enzymes and matrix proteins to its descendants that supported the metazoan ability to biocalcify. However, lineage specific evolution is also likely to have contributed significantly to the ability of disparate metazoan lineages to biocalcify.

  19. Hematospermia in a returned traveler.

    Science.gov (United States)

    Lang, Raynell; Minion, Jessica; Wong, Alexander

    2017-01-01

    Hematospermia is a common complaint among patients seen in outpatient urology clinics. The differential diagnosis is broad and includes inflammatory, infectious, neoplastic, structural, systemic, and traumatic causes. The most common infectious causes are uropathogens and sexually transmitted infections. However, with increasing global travel, physicians must maintain a high clinical suspicion for pathogens not endemic to their region, including Echinococcus, Mycobacterium tuberculosis, and Schistosoma.1 We present a case of hematospermia in a traveler returning from Eastern Africa with exposure to Lake Malawi. The patient's microscopic analysis of semen was positive for Schistosoma haematobium, revealing a rare presentation of S. haematobium infection.

  20. A new method to separate star forming from AGN galaxies at intermediate redshift: The submillijansky radio population in the VLA-COSMOS survey

    CERN Document Server

    Smolcic, V; Scodeggio, M; Franzetti, P; Aussel, H; Bondi, M; Brusa, M; Carilli, C L; Capak, P; Charlot, S; Ciliegi, P; Ilbert, O; Ivezic, Z; Jahnke, K; McCracken, H J; Obric, M; Salvato, M; Sanders, D B; Scoville, N; Trump, J R; Tremonti, C; Tasca, L; Walcher, C J; Zamorani, G

    2008-01-01

    We explore the properties of the submillijansky radio population at 20 cm by applying a newly developed optical color-based method to separate star forming (SF) from AGN galaxies at intermediate redshifts (z1.3) galaxies. We find, for the composition of the submillijansky radio population, that SF galaxies are not the dominant population at submillijansky flux levels, as previously often assumed, but that they make up an approximately constant fraction of 30-40% in the flux density range of ~50 microJy to 0.7 mJy. In summary, based on the entire VLA-COSMOS radio population at 20 cm, we find that the radio population at these flux densities is a mixture of roughly 30-40% of SF and 50-60% of AGN galaxies, with a minor contribution (~10%) of QSOs.

  1. Reabsorption of returning workers from the Gulf: the Asian experience.

    Science.gov (United States)

    Kazi, S

    1994-01-01

    This study examines trends in return labor migration from the Middle East to South Asia and Southeast Asia. Survey data were used to describe trends in outmigration and socioeconomic characteristics of return migrants and to examine the extent to which return migration is associated with skill level and use of savings and remittances on their return. General trends indicate a decline in outmigration during the late 1980s and early 1990s, after oil prices dropped in 1986. Migrants from Pakistan and Korea declined by half during 1981-85 and by 40% among Indian migrants. The demand for service workers and migrants willing to accept cuts in wages was unaffected. Outmigration from Southeast Asian countries grew in the recent past. These increases were due to the replacement of workers from Jordan and Yemen who were expelled from Saudi Arabia after the Gulf crisis. The shift in occupational demand to service and higher level workers is expected to weaken migration from Pakistan and Bangladesh and to strengthen migration from Sri Lanka and other Southeast Asian countries with a skilled migrant labor force. Outmigration from Southeast Asian countries increased to high-growth destination countries such as Japan, Malaysia, and Singapore. Socioeconomic characteristics of migrants varied by country of origin. For instance, Philippine migrants were better educated. Migrants from Thailand, Bangladesh, and Pakistan were from rural and impoverished areas. Sri Lanka and the Philippines had many women migrants. Return migrants encountered high unemployment. Return migrants to Korea had fewer reemployment problems. Reemployment was associated with local country conditions. Unskilled workers had the highest rates of unemployment. Savings tended to be invested in real estate and housing. Savings and investment from remittance income was high in Sri Lanka, Bangladesh, and Thailand.

  2. Triple F - A Comet Nucleus Sample Return Mission

    Science.gov (United States)

    Kueppers, Michael; Keller, H. U.; Kuehrt, E.; A'Hearn, M. F.; Altwegg, K.; Bertrand, R.; Busemann, H.; Capria, M. T.; Colangeli, L.; Davidsson, B.; hide

    2008-01-01

    The Triple F (Fresh From the Fridge) mission, a Comet Nucleus Sample Return, has been proposed to ESA's Cosmic Vision program. A sample return from a comet enables us to reach the ultimate goal of cometary research. Since comets are the least processed bodies in the solar system, the proposal goes far beyond cometary science topics (like the explanation of cometary activity) and delivers invaluable information about the formation of the solar system and the interstellar molecular cloud from which it formed. The proposed mission would extract three sample cores of the upper 50 cm from three locations on a cometary nucleus and return them cooled to Earth for analysis in the laboratory. The simple mission concept with a touch-andgo sampling by a single spacecraft was proposed as an M-class mission in collaboration with the Russian space agency ROSCOSMOS.

  3. 77 FR 1511 - Agency Information Collection Activities: Proposed Collection, Comments Requested; Monthly Return...

    Science.gov (United States)

    2012-01-10

    ... Requested; Monthly Return of Human Trafficking Offenses Known to Law Enforcement ACTION: 60-day notice of... Return of Human Trafficking Offenses Known to Law Enforcement. (3) The agency form number, if any, and... collect information on human trafficking incidents committed throughout the United States. (5) An...

  4. 77 FR 15396 - Agency Information Collection Activities: Proposed Collection, Comments Requested; Monthly Return...

    Science.gov (United States)

    2012-03-15

    ... Requested; Monthly Return of Human Trafficking Offenses Known to Law Enforcement ACTION: 30-day Notice of... collection. (2) The title of the form/collection: Monthly Return of Human Trafficking Offenses Known to Law... Abstract: This collection is needed to collect information on human trafficking incidents...

  5. Factors Influencing Middle and High Schools' Active Parental Consent Return Rates

    Science.gov (United States)

    Ji, Peter Y.; Pokorny, Steven B.; Jason, Leonard A.

    2004-01-01

    The authors examined factors influencing the return rates for attempting to collect active parental consent forms from 21,123 students in the 7th through 10th grades in 41 middle and high schools. Overall return rates from middle schools were higher than from high schools. Schools that offered high levels of staff support for collecting consent…

  6. 26 CFR 1.6081-9 - Automatic extension of time to file exempt organization returns.

    Science.gov (United States)

    2010-04-01

    ... Automatic extension of time to file exempt organization returns. (a) In general. A corporation required to... of time for an exempt organization to file Form 990-C, “Farmer's Cooperative Association Income Tax... applies to requests for extensions of time to file an exempt organization return due after December 7...

  7. Return to sport following amputation.

    Science.gov (United States)

    Matthews, D; Sukeik, M; Haddad, F

    2014-08-01

    Amputation in athletes has a substantial impact on lifestyle and sporting activity, as well as self-perception and quality of life. The impact of limb loss on athletic ability will vary depending on the cause of amputation and the anatomical location of the amputation. The use of sporting activity for rehabilitation of amputees was first introduced in 1944 at Stoke Mandeville Hospital. The first international paralympic games were founded in 1960. Following these events the opportunity to participate in sport following limb loss has increased significantly. Sport participation has been aided by the development of sporting prostheses, however multiple factors will determine the exact prosthesis used. These include the nature of the sporting activity as well as the level of the amputation. The biomechanics involved in walking and running are altered following the loss of a limb or part thereof. This can cause subsequent degenerative changes within the remaining joints on the amputated limb as well as the contralateral limb. Factors affecting return to sporting activity are multivariate and inter-related, including patient factors, surgical factors, nature and level of the sporting activity and prosthetic factors. The authors review current literature, detail predictive factors of return to sport and the physical and psychosocial impact on patients following limb amputation.

  8. RETURN MIGRATION – REASONS, CONSEQUENCES AND BENEFITS

    Directory of Open Access Journals (Sweden)

    RAMONA PÎRVU

    2012-12-01

    Full Text Available Return migration is probably the aspect of the migration cycle, which was granted the lowest attention, perhaps because most research resources are located in highly developed countries, while most of the returning most returnees return to developing countries. This is especially unfortunate because perceptions about the process of returning to the country of origin and attitudes towards returning migrants have a significant impact on migrants and their host communities. Rollback, sometimes called remigration, is considered by some authors as the final stage of the migration process, which further comprises the step preparation / decision to migrate and actual migration phase or installation of migrant destination country selected.

  9. Estimating Risk and Return Combinations for New Derivatives Funds

    Directory of Open Access Journals (Sweden)

    Alexandre Bona

    2004-12-01

    Full Text Available Active funds are typically managed by placing bets against a well defined passive bench-mark. In this context, when examining the launching of a new actively managed fund with a target expected excess rate of return relative to the benchmark equal to µ, asset managers face the problem of estimating the risk σ of excess rates of return. This estimate is critical to examine whether the product is commercially feasible and to define risk limits for the manager, if the product is launched. This paper proceeds to examine the solution to this problem assuming an especial form of the binomial model, in the context of the market timing structure advanced by Merton (1981. The paper shows that two variables are relevant for the solution of the proposed problem. The first, and the most relevant, is the skill level of the manager. A ore skilled manager is able to operate a less risky product with the same target excess rate of return µ. The second relevant variable is the trade-off between risk and return determined by existing investment opportunities in the market. The smaller the increases in risk exposure required to obtain an increase in excess returns, the less risky the product will be After solving the problem under specific assumptions, the paper proceeds to test empirically their validity using a representative sample of hedge funds in the Brazilian market. The empirical results strongly support the validity of the required assumptions.

  10. Predictors of Business Return in New Orleans after Hurricane Katrina

    Science.gov (United States)

    Lam, Nina S. N.; Arenas, Helbert; Pace, Kelley; LeSage, James; Campanella, Richard

    2012-01-01

    We analyzed the business reopening process in New Orleans after Hurricane Katrina, which hit the region on August 29, 2005, to better understand what the major predictors were and how their impacts changed through time. A telephone survey of businesses in New Orleans was conducted in October 2007, 26 months after Hurricane Katrina. The data were analyzed using a modified spatial probit regression model to evaluate the importance of each predictor variable through time. The results suggest that the two most important reopening predictors throughout all time periods were the flood depth at the business location and business size as represented by its wages in a logarithmic form. Flood depth was a significant negative predictor and had the largest marginal effects on the reopening probabilities. Smaller businesses had lower reopening probabilities than larger ones. However, the nonlinear response of business size to the reopening probability suggests that recovery aid would be most effective for smaller businesses than for larger ones. The spatial spillovers effect was a significant positive predictor but only for the first nine months. The findings show clearly that flood protection is the overarching issue for New Orleans. A flood protection plan that reduces the vulnerability and length of flooding would be the first and foremost step to mitigate the negative effects from climate-related hazards and enable speedy recovery. The findings cast doubt on the current coastal protection efforts and add to the current debate of whether coastal Louisiana will be sustainable or too costly to protect from further land loss and flooding given the threat of sea-level rise. Finally, a plan to help small businesses to return would also be an effective strategy for recovery, and the temporal window of opportunity that generates the greatest impacts would be the first 6∼9 months after the disaster. PMID:23133530

  11. Predictors of business return in New Orleans after Hurricane Katrina.

    Directory of Open Access Journals (Sweden)

    Nina S N Lam

    Full Text Available We analyzed the business reopening process in New Orleans after Hurricane Katrina, which hit the region on August 29, 2005, to better understand what the major predictors were and how their impacts changed through time. A telephone survey of businesses in New Orleans was conducted in October 2007, 26 months after Hurricane Katrina. The data were analyzed using a modified spatial probit regression model to evaluate the importance of each predictor variable through time. The results suggest that the two most important reopening predictors throughout all time periods were the flood depth at the business location and business size as represented by its wages in a logarithmic form. Flood depth was a significant negative predictor and had the largest marginal effects on the reopening probabilities. Smaller businesses had lower reopening probabilities than larger ones. However, the nonlinear response of business size to the reopening probability suggests that recovery aid would be most effective for smaller businesses than for larger ones. The spatial spillovers effect was a significant positive predictor but only for the first nine months. The findings show clearly that flood protection is the overarching issue for New Orleans. A flood protection plan that reduces the vulnerability and length of flooding would be the first and foremost step to mitigate the negative effects from climate-related hazards and enable speedy recovery. The findings cast doubt on the current coastal protection efforts and add to the current debate of whether coastal Louisiana will be sustainable or too costly to protect from further land loss and flooding given the threat of sea-level rise. Finally, a plan to help small businesses to return would also be an effective strategy for recovery, and the temporal window of opportunity that generates the greatest impacts would be the first 6∼9 months after the disaster.

  12. Predictors of business return in New Orleans after Hurricane Katrina.

    Science.gov (United States)

    Lam, Nina S N; Arenas, Helbert; Pace, Kelley; LeSage, James; Campanella, Richard

    2012-01-01

    We analyzed the business reopening process in New Orleans after Hurricane Katrina, which hit the region on August 29, 2005, to better understand what the major predictors were and how their impacts changed through time. A telephone survey of businesses in New Orleans was conducted in October 2007, 26 months after Hurricane Katrina. The data were analyzed using a modified spatial probit regression model to evaluate the importance of each predictor variable through time. The results suggest that the two most important reopening predictors throughout all time periods were the flood depth at the business location and business size as represented by its wages in a logarithmic form. Flood depth was a significant negative predictor and had the largest marginal effects on the reopening probabilities. Smaller businesses had lower reopening probabilities than larger ones. However, the nonlinear response of business size to the reopening probability suggests that recovery aid would be most effective for smaller businesses than for larger ones. The spatial spillovers effect was a significant positive predictor but only for the first nine months. The findings show clearly that flood protection is the overarching issue for New Orleans. A flood protection plan that reduces the vulnerability and length of flooding would be the first and foremost step to mitigate the negative effects from climate-related hazards and enable speedy recovery. The findings cast doubt on the current coastal protection efforts and add to the current debate of whether coastal Louisiana will be sustainable or too costly to protect from further land loss and flooding given the threat of sea-level rise. Finally, a plan to help small businesses to return would also be an effective strategy for recovery, and the temporal window of opportunity that generates the greatest impacts would be the first 6∼9 months after the disaster.

  13. 27 CFR 479.151 - Failure to make returns: Substitute returns.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 3 2010-04-01 2010-04-01 false Failure to make returns: Substitute returns. 479.151 Section 479.151 Alcohol, Tobacco Products, and Firearms BUREAU OF ALCOHOL...: Substitute returns. If any person required by this part to make returns shall fail or refuse to make any such...

  14. A SURVEY OF BRACING FORMS IN BRACED FRAME STRUCTURE%支撑框架结构中支撑形式综述

    Institute of Scientific and Technical Information of China (English)

    赵作周; 刘庆志; 康洪震; 钱稼茹

    2011-01-01

    对国内外支撑框架结构中的支撑形式进行回顾和比较,主要介绍7类支撑(中心支撑、偏心支撑、斜隅支撑、防屈曲支撑、附设耗能器支撑、自复位支撑和索系支撑)的基本原理、研究现状和存在的问题,在总结的基础上提出各类支撑的相互关系和应用范围。%Seven bracing forms in braced frame structures are reviewed and compared,including concentrical brace,eccentric brace,knee brace,buckling restrained brace,extra damper brace,self-centering brace and cable brace.Fundamental principle,state-of-the-art of study and existing problems of each kind of the braces are introduced.Mutual relationship and range of application of the braces are summarized.

  15. Return on shares of steel companies under the influence of mergers and acquisitions

    Directory of Open Access Journals (Sweden)

    J. Zuzik

    2015-01-01

    Full Text Available The present article intends to asses returns on shares of the steel companies that were formed based on either merger or acquisition. The analysis included 14 operations in the steel industry. Attention was paid to returns of the companies performing acquisitions, as well as to the returns on shares that presented the acquisition target. The analysis was performed based on the “event study” method, and the analysed event was the announcement or notification of realization of an acquisition. Shares of the target steel companies as well as acquirers are attaining higher returns, but the change was not statistical significant.

  16. Risk Stratification of Stress Fractures and Prediction of Return-to-Duty

    Science.gov (United States)

    2016-12-01

    Award Number: W81XWH-15-C-0024 TITLE: Risk Stratification of Stress Fractures and Prediction of Return -to-Duty PRINCIPAL INVESTIGATOR: Mary L...SUBTITLE Risk Stratification of Stress Fractures and Prediction of Return -to-Duty 5a. CONTRACT NUMBER W81XWH-15-C-0024 Return -to-Duty 5b. GRANT... RETURN YOUR FORM TO THE ABOVE ADDRESS. 1. REPORT DATE December 2016 2. REPORT TYPE Annual 3. DATES COVERED 15 Nov 2015- 14 Nov 2016 4. TITLE AND

  17. New Skills, New Jobs: Return Migration, Skill Transfers, and Business Formation in Mexico.

    Science.gov (United States)

    Hagan, Jacqueline Maria; Wassink, Joshua

    2016-11-01

    Numerous studies have documented a high propensity for self-employment and business formation among return migrants relative to non-migrants. The literature points to the importance of remitted savings, migration duration, and number and types of jobs abroad for business formation upon return. Implicit in this scholarship is the assumption that migrants acquire not only financial capital, but also human capital, which expands their opportunities upon return. Empirical work has demonstrated how the transfer of formal human capital, such as language skills and professional credentials, influences the mobility pathways of professional return migrants. More recent research has also found that the transfer of informal human capital, such as social and technical skills learned on the job, shape the mobility pathways of return migrants with little schooling. Absent from this scholarship, however, are studies that directly test the relationship between the transfer of informal human capital and the odds of business formation among return migrants. In this paper, we address this gap. Using a multidimensional skills variable, which includes social, technical, and English language competences, we measure and test the relationship between skill acquisition and transfer and business formation among return migrants. Drawing on findings from a survey of 200 return migrants and 200 non-migrants in Mexico, we show that return migrants who successfully acquire and transfer new skills across the migratory circuit often leverage their new knowledge to launch businesses. Our findings have wide implications for how social scientists conceptualize and measure human capital formation across the migratory circuit.

  18. Food security of older adults requesting Older Americans Act Nutrition Program in Georgia can be validly measured using a short form of the U.S. Household Food Security Survey Module.

    Science.gov (United States)

    Lee, Jung Sun; Johnson, Mary Ann; Brown, Arvine; Nord, Mark

    2011-07-01

    Food security is a newly recommended outcome measure for the Older Americans Act Nutrition Program (OAANP); however, it is unknown how best to evaluate the need for this program and assess its impact on a large scale. Therefore, we measured food security in all new OAANP participants and waitlisted applicants in Georgia between July and early November, 2008 (n = 4731) with the self-administered mail survey method used in the ongoing Georgia Performance Outcomes Measures project. We used a modified 6-item U.S. Household Food Security Survey Module (HFSSM) with a 30-d reference period and 2 reminder postcards. Approximately 33% of those identified completed the survey (n = 1594, mean age 74.6 ± 9.5 y, 68.6% female, 30.6% black). Most of the respondents (91%) completed all 6 food security questions, whereas 26 did not respond to any question. Infit and outfit statistics for each of the 6 questions were within an acceptable range. Psychometric properties observed in our food security data were generally similar to those in the nationally representative survey conducted by the Census Bureau and suggest that our food security statistics may be meaningfully compared with national food security statistics published by the USDA. Our findings suggest that food security can be reasonably measured by a short form of HFSSM in older adults requesting OAANP. Such methodology also can be used to estimate the extent of food insecurity and help guide program and policy decisions to meet the nutrition assistance needs of vulnerable older adults.

  19. The dynamics of health and return migration.

    Science.gov (United States)

    Davies, Anita A; Borland, Rosilyne M; Blake, Carolyn; West, Haley E

    2011-06-01

    The increasing importance and complexity of migration globally also implies a global increase in return migration, and thus an increased interest in the health of returning migrants. The health of returning migrants is impacted by the cumulative exposure to social determinants and risk factors of health during the migration process, during the return movement, and following return. Circular migration often occurs among the diaspora, which can result in the transfer of knowledge and skills that contribute to development, including health system strengthening. Migrants with dual nationality often return to countries with better health services than their country of origin when they are sick and can not get care at home. To maintain and improve the health of returning migrants, multi-sectoral policies at global and national levels should facilitate access to appropriate and equitable health services, social services, and continuity of care across and within borders.

  20. The dynamics of health and return migration.

    Directory of Open Access Journals (Sweden)

    Anita A Davies

    2011-06-01

    Full Text Available The increasing importance and complexity of migration globally also implies a global increase in return migration, and thus an increased interest in the health of returning migrants. The health of returning migrants is impacted by the cumulative exposure to social determinants and risk factors of health during the migration process, during the return movement, and following return. Circular migration often occurs among the diaspora, which can result in the transfer of knowledge and skills that contribute to development, including health system strengthening. Migrants with dual nationality often return to countries with better health services than their country of origin when they are sick and can not get care at home. To maintain and improve the health of returning migrants, multi-sectoral policies at global and national levels should facilitate access to appropriate and equitable health services, social services, and continuity of care across and within borders.

  1. Stock return comovement and Korean business groups

    Directory of Open Access Journals (Sweden)

    Chan Ho Cho

    2015-12-01

    Full Text Available This paper explores whether business group affiliations affect the covariance structure of stock returns in Korea. We find that the stock returns of firms belonging to the same business group show positive and significant comovement. The strong comovement between group returns and firm returns is explained by correlated fundamentals. We find strong comovement among business group affiliate earnings. Moreover, variance decomposition of returns shows that cash flow news plays a relatively more important role in explaining group comovement than discount rate news, suggesting a link between stock return comovement and the “tunneling” and “propping” behaviors of business groups. Finally, return comovement increases when a firm joins a business group.

  2. A Weak Lensing Study of X-ray Groups in the Cosmos Survey: Form and Evolution of the Mass-Luminosity Relation

    Science.gov (United States)

    Leauthaud, Alexie; Finoguenov, Alexis; Kneib, Jean-Paul; Taylor, James E.; Massey, Richard; Rhodes, Jason; Ilbert, Olivier; Bundy, Kevin; Tinker, Jeremy; George, Matthew R.; Capak, Peter; Koekemoer, Anton M.; Johnston, David E.; Zhang, Yu-Ying; Cappelluti, Nico; Ellis, Richard S.; Elvis, Martin; Giodini, Stefania; Heymans, Catherine; Le Fèvre, Oliver; Lilly, Simon; McCracken, Henry J.; Mellier, Yannick; Réfrégier, Alexandre; Salvato, Mara; Scoville, Nick; Smoot, George; Tanaka, Masayuki; Van Waerbeke, Ludovic; Wolk, Melody

    2010-01-01

    Measurements of X-ray scaling laws are critical for improving cosmological constraints derived with the halo mass function and for understanding the physical processes that govern the heating and cooling of the intracluster medium. In this paper, we use a sample of 206 X-ray-selected galaxy groups to investigate the scaling relation between X-ray luminosity (L X) and halo mass (M 200) where M 200 is derived via stacked weak gravitational lensing. This work draws upon a broad array of multi-wavelength COSMOS observations including 1.64 degrees2 of contiguous imaging with the Advanced Camera for Surveys to a limiting magnitude of I F814W = 26.5 and deep XMM-Newton/Chandra imaging to a limiting flux of 1.0 × 10-15 erg cm-2 s-1 in the 0.5-2 keV band. The combined depth of these two data sets allows us to probe the lensing signals of X-ray-detected structures at both higher redshifts and lower masses than previously explored. Weak lensing profiles and halo masses are derived for nine sub-samples, narrowly binned in luminosity and redshift. The COSMOS data alone are well fit by a power law, M 200 vprop (L X)α, with a slope of α = 0.66 ± 0.14. These results significantly extend the dynamic range for which the halo masses of X-ray-selected structures have been measured with weak gravitational lensing. As a result, tight constraints are obtained for the slope of the M-L X relation. The combination of our group data with previously published cluster data demonstrates that the M-L X relation is well described by a single power law, α = 0.64 ± 0.03, over two decades in mass, M 200 ~ 1013.5-1015.5 h -1 72 M sun. These results are inconsistent at the 3.7σ level with the self-similar prediction of α = 0.75. We examine the redshift dependence of the M-L X relation and find little evidence for evolution beyond the rate predicted by self-similarity from z ~ 0.25 to z ~ 0.8. Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope

  3. Geodetic Survey Water Level Observations

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Over one million images of National Coast & Geodetic Survey (now NOAA's National Geodetic Survey/NGS) forms captured from microfiche. Tabular forms and charts...

  4. Population age structure and asset returns: an empirical investigation.

    Science.gov (United States)

    Poterba, J M

    1998-10-01

    "This paper investigates the association between population age structure, particularly the share of the population in the 'prime saving years' 45-60, and the returns on stocks and bonds. The paper is motivated by the claim that the aging of the 'Baby Boom' cohort in the United States is a key factor in explaining the recent rise in asset values. It also addresses the associated claim that asset prices will decline when this large cohort reaches retirement age and begins to reduce its asset holdings. This paper begins by considering household age-asset accumulation profiles. Data from the Survey of Consumer Finances suggest that while cross-sectional age-wealth profiles peak for households in their early 60s, cohort data on the asset ownership of the same households show a much less pronounced peak.... The paper then considers the historical relationship between demographic structure and real returns on Treasury bills, long-term government bonds, and corporate stock. The results do not suggest any robust relationship between demographic structure and asset returns.... The paper concludes by discussing factors such as international capital flows and forward-looking behavior on the part of market participants that could weaken the relationship between age structure and asset returns in a single nation." excerpt

  5. Multivariate return periods of sea storms for coastal erosion risk assessment

    Directory of Open Access Journals (Sweden)

    S. Corbella

    2012-08-01

    Full Text Available The erosion of a beach depends on various storm characteristics. Ideally, the risk associated with a storm would be described by a single multivariate return period that is also representative of the erosion risk, i.e. a 100 yr multivariate storm return period would cause a 100 yr erosion return period. Unfortunately, a specific probability level may be associated with numerous combinations of storm characteristics. These combinations, despite having the same multivariate probability, may cause very different erosion outcomes. This paper explores this ambiguity problem in the context of copula based multivariate return periods and using a case study at Durban on the east coast of South Africa. Simulations were used to correlate multivariate return periods of historical events to return periods of estimated storm induced erosion volumes. In addition, the relationship of the most-likely design event (Salvadori et al., 2011 to coastal erosion was investigated. It was found that the multivariate return periods for wave height and duration had the highest correlation to erosion return periods. The most-likely design event was found to be an inadequate design method in its current form. We explore the inclusion of conditions based on the physical realizability of wave events and the use of multivariate linear regression to relate storm parameters to erosion computed from a process based model. Establishing a link between storm statistics and erosion consequences can resolve the ambiguity between multivariate storm return periods and associated erosion return periods.

  6. Neutral Hydrogen Optical Depth near Star-forming Galaxies at z ≈ 2.4 in the Keck Baryonic Structure Survey

    Science.gov (United States)

    Rakic, Olivera; Schaye, Joop; Steidel, Charles C.; Rudie, Gwen C.

    2012-06-01

    We study the interface between galaxies and the intergalactic medium by measuring the absorption by neutral hydrogen in the vicinity of star-forming galaxies at z ≈ 2.4. Our sample consists of 679 rest-frame UV-selected galaxies with spectroscopic redshifts that have impact parameters background QSOs and that fall within the redshift range of its Lyα forest. We present the first two-dimensional maps of the absorption around galaxies, plotting the median Lyα pixel optical depth as a function of transverse and line-of-sight separation from galaxies. The Lyα optical depths are measured using an automatic algorithm that takes advantage of all available Lyman series lines. The median optical depth, and hence the median density of atomic hydrogen, drops by more than an order of magnitude around 100 kpc, which is similar to the virial radius of the halos thought to host the galaxies. The median remains enhanced, at the >3σ level, out to at least 2.8 Mpc (i.e., >9 comoving Mpc), but the scatter at a given distance is large compared with the median excess optical depth, suggesting that the gas is clumpy. Within 100 (200) kpc, and over ±165 km s-1, the covering fraction of gas with Lyα optical depth greater than unity is 100+0 - 32% (66% ± 16%). Absorbers with τLyα > 0.1 are typically closer to galaxies than random. The mean galaxy overdensity around absorbers increases with the optical depth and also as the length scale over which the galaxy overdensity is evaluated is decreased. Absorbers with τLyα ~ 1 reside in regions where the galaxy number density is close to the cosmic mean on scales >=0.25 Mpc. We clearly detect two types of redshift space anisotropies. On scales 3σ significance), an effect that we attribute to large-scale infall (i.e., the Kaiser effect). Based on data obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and NASA, and was made

  7. Increasing the Rate of Return of Resident Rotation Evaluations by Their Attending Physicians in an In-Patient Psychiatric Facility

    Science.gov (United States)

    Shah, Nurun; Thompson, Britta; Averill, Patricia; Searle, Nancy

    2007-01-01

    Objective: Psychiatrist's evaluations of residents are the primary means of determining whether the residents are ready to be promoted. However, the return rate for evaluations is quite low. The purpose of this study was to increase the return rates. Methods: Feedback from two surveys and open discussion was utilized to develop and implement a…

  8. ANALYSIS OF MONTHLY RATES OF RETURN IN APRIL ON THE EXAMPLE OF SELECTED WORLD STOCK EXCHANGE INDICES

    National Research Council Canada - National Science Library

    Borowski, Krzysztof

    2016-01-01

    ...-IPC, Nasdaq, Nikkei, Russel, TSE and WIG, the obtained monthly rates of return were statistically equal to zero. In the last part of the article, the correlation coefficients of rates of return for analyzed indices in month of April were surveyed. Introduction Efficient market hypothesis (EMH), the core of the influential paper ...

  9. Return-to-Work Self-Efficacy : Development and Validation of a Scale in Claimants with Musculoskeletal Disorders

    NARCIS (Netherlands)

    Brouwer, Sandra; Franche, Renee-Louise; Hogg-Johnson, Sheilah; Lee, Hyunmi; Krause, Niklas; Shaw, William S.

    2011-01-01

    Introduction We report on the development and validation of a 10-item scale assessing self-efficacy within the return-to-work context, the Return-to-Work Self-Efficacy (RTWSE) scale. Methods Lost-time claimants completed a telephone survey 1 month (n = 632) and 6 months (n = 446) after a work-relate

  10. Voluntary return programmes in Bolivia and Spain in the context of crisis

    Directory of Open Access Journals (Sweden)

    Sònia Parella Rubio

    2014-09-01

    Full Text Available From 2008 onwards, the economic crisis experienced by countries such as Spain marked a turning point in migratory flows. As a result, faced with the serious reality of unemployment and the precariousness of the Spanish labour market, the option of return has become the last resort for some immigrants, and an attractive strategy for governments (of both countries of origin and destination, which attempt to manage return using special programmes. From this point of view, the aim of this paper is to examine the assisted voluntary return programmes in Spain and Bolivia and their suitability to the dynamics of return, beginning with an exhaustive review of the programmes and the perceptions on them expressed by Bolivian immigrants as part of the survey «Circulation and Return», carried out within the framework of the RETTRANS project.

  11. Policy for returning to fisheries in Korea

    Directory of Open Access Journals (Sweden)

    Jihoon Kim

    2016-07-01

    Full Text Available Korea’s fishing industry is currently facing problems involving an aging society and lack of successors in fishing villages. Therefore, the Korea Ministry of Oceans and Fisheries (KMOF has implemented a policy supporting U-turn fishers, who leave their place of origin for a job and then return home or move to where they can work in the fishing industry. Moreover, some local governments have established a policy for U-turn fishers. The KMOF policy is a financial support program with low interest rates and lengthy reimbursement periods; however, few beneficiaries exist. Meanwhile, local government policy benefits most persons in corresponding areas. However, the sums are relatively small, and only two local governments have enacted the policy. This study determines the performance of the policy through indepth interviews and a survey. The results indicate that KMOF policy may be limited in terms of its scope. In addition, noneconomic support programs, such as fishing education, harmony between existing fishers, and the acquisition of fishery rights, are required. The number of U-turn fishers will continue to increase as the baby boomer generation nears retirement and unemployment of youth increases. As such, the Korean government needs to improve the policy in keeping with the times.

  12. Melioidosis in a returning traveller

    Science.gov (United States)

    Ismail, Alaa; Buckley, Adam; Dubrey, Simon William

    2013-01-01

    A 66-year-old man returned to the UK from Thailand with a 2-week history of new confusion, hallucinations, fever with rigours and productive cough. He had not responded to (unspecified) antibiotic treatment in Thailand. On examination he was afebrile, with an abbreviated mental test score of 8/10 and no other findings on systemic examination. He was treated with ceftriaxone in response to discovery of a Gram-negative organism in blood. This was converted to meropenem on the clinical suspicion of our microbiologist, on the basis of a history of contact with surface water in the Far East. A blood culture subsequently confirmed Burkholderia pseudomallei. His condition remained stable for approximately 4 days, but then deteriorated over the course of the next 2 weeks with pneumonia and subsequent formation of disseminated abscesses. Treatment was withdrawn as his condition deteriorated to the point at which survival was deemed impossible and he subsequently died. PMID:23605844

  13. Characteristics of patients and families who make early return visits to the pediatric emergency department

    Directory of Open Access Journals (Sweden)

    Logue EP

    2013-06-01

    Full Text Available Erin Patricia Logue,1 Samina Ali,2,3 Judith Spiers,4 Amanda S Newton,2,3 Janice A Lander4 1 Alberta Health Services, 2Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, 3Women and Children’s Health Research Institute, 4Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada Objectives: The primary objective of this study was to identify reasons why parents make early return visits, within 72 hours of discharge from a tertiary care pediatric emergency department (PED. A secondary objective was to investigate associated demographic and diagnostic variables. Methods: A survey was conducted with a convenience sample of parents of children returning to the PED within 72 hours of discharge. A chart review was also completed for consented survey participants. Recruitment occurred from September 2005 to August 2006 at the Stollery Children's Hospital, Edmonton, Alberta, Canada. Results: A total of 264 parents were approached to participate. Overall, 231 surveys were returned and 212 (92% charts were reviewed. The overall rate of early return during the study period was 5.4%. More than half of parents stated that they returned because their child's condition worsened and many parents (66.7% reported feeling stressed. Patients were typically under 6 years of age (67.4%, and most frequently diagnosed with infectious diseases (38.0%. Patients triaged with the Canadian Emergency Department Triage and Acuity Scale (CTAS as CTAS 2 (emergent for initial visits were more likely to be admitted on return, regardless of age (P < 0.001. Conclusion: Variables associated with early returns included young age, diagnosis, triage acuity, and parental stress. Future variable definition should include a deeper exploration of modifiable factors such as parental stress and patient education. These next steps may help direct interventions and resources to address needs in this group and possibly pre-empt the need to return

  14. [Return migration and the development of a rural commune in Basilicata].

    Science.gov (United States)

    King, R; Mortimer, J; Strachan, A; Viganola, M

    1985-06-01

    "This study, based essentially on a survey of 80 returnees, examines the extent to which return migration has contributed to processes of economic change in an agro-town in southern Italy, Bernalda (Potenza)." The authors conclude that return migration has had only a limited impact on the economy because of the low demand for skilled labor in the area of origin. (summary in ENG, FRE)

  15. The Impact of Schooling Reform on Returns to Education in Malaysia

    OpenAIRE

    Ismail, Ramlee

    2007-01-01

    The objective of this paper is to examine the impact of education reforms on earnings. One of the significant changes in the Malaysian education system was the schooling reform of 1970 that changed the medium of instruction from the English language to the Malaysian national language. Using data from the Household Income Surveys of 2002 and 2004, this paper updates the private rate of return to education. Applying a homogenous return model, using an ordinary least square (OLS) regression indi...

  16. The Impact of Schooling Reform on Returns to Education in Malaysia

    OpenAIRE

    Ismail, Ramlee

    2007-01-01

    The objective of this paper is to examine the impact of education reforms on earnings. One of the significant changes in the Malaysian education system was the schooling reform of 1970 that changed the medium of instruction from the English language to the Malaysian national language. Using data from the Household Income Surveys of 2002 and 2004, this paper updates the private rate of return to education. Applying a homogenous return model, using an ordinary least square (OLS) regression indi...

  17. Survey on the differentiation of consumption in various types of automatic wood burners; Erhebung Verbrauchssplitting bei automatischen Holzfeuerungen

    Energy Technology Data Exchange (ETDEWEB)

    Primas, A.; Kistler, M.; Kessler, F.

    2006-07-01

    This final report published by the Swiss Federal Office of Energy (SFOE) takes a look at how statistics on wood-consumption can be differentiated to take various types of wood-fired heating systems into consideration. The approach used, which involved the taking of 1200 random samples from a total of 5200 installations, is described. Figures are presented on the return-quotients reached. The questionnaires returned were sorted according to the types of installation, such as industrial/commercial, farming, services and household. As a result of the high return-rate, the accuracy of the estimates based on the data is also considered to be high. The paper describes how the survey was made and how the results were obtained from the data collected. Details on operation, types of fuel, specific consumption and factors influencing operation are presented in graphical form. An appendix presents the data collected in tabular form.

  18. Pediatric Concussion Management in the Emergency Department: A National Survey of Parents.

    Science.gov (United States)

    Zamarripa, Angela; Clark, Sarah J; Rogers, Alexander J; Wang-Flores, Helena; Stanley, Rachel M

    2017-02-01

    To examine parental expectations and beliefs about diagnosis and management of pediatric concussion. We conducted a cross-sectional web-based survey of a nationally representative panel of US parents in March 2014. Parents of 10- to 17-year-old children responded to questions about their expectations and beliefs about diagnosis and management of pediatric concussion in the emergency department (ED). Weighted percentages for descriptive statistics were calculated, and χ2 statistics were used for bivariate analysis. Survey participation was 53%, and of 912 parent respondents with a child 10-17 years of age who were presented with a scenario of their child having mild symptoms of concussion, 42% would seek immediate ED care. Parents who would seek immediate ED care for this scenario were more likely than parents who would consult their child's usual provider or wait at home to "definitely expect" imaging (65% vs 21%), definitive diagnosis of concussion (77% vs 61%), a timeline for return to activity (80% vs 60%), and a signed return to play form (55% vs 41%). Many parents who bring children to the ED following a possible concussion are likely to expect comprehensive and definitive care, including imaging, a definitive diagnosis, a timeline for return to activity, and a signed return to play form. To manage these expectations, healthcare providers should continue to educate parents about the evaluation and management of concussion. Copyright © 2016 Elsevier Inc. All rights reserved.

  19. Understanding the multifractality in portfolio excess returns

    Science.gov (United States)

    Chen, Cheng; Wang, Yudong

    2017-01-01

    The multifractality in stock returns have been investigated extensively. However, whether the autocorrelations in portfolio returns are multifractal have not been considered in the literature. In this paper, we detect multifractal behavior of returns of portfolios constructed based on two popular trading rules, size and book-to-market (BM) ratio. Using the multifractal detrended fluctuation analysis, we find that the portfolio returns are significantly multifractal and the multifractality is mainly attributed to long-range dependence. We also investigate the multifractal cross-correlation between portfolio return and market average return using the detrended cross-correlation analysis. Our results show that the cross-correlations of small fluctuations are persistent, while those of large fluctuations are anti-persistent.

  20. Field Observations Of The 29 September Tsunami In American Samoa: Spatial Variability And Indications Of Strong Return Flow

    Science.gov (United States)

    Jaffe, B. E.; Richmond, B. M.; Gelfenbaum, G. R.; Watt, S.; Apotsos, A. A.; Buckley, M. L.; Dudley, W. C.; Peck, B.

    2009-12-01

    The 29 September 2009 tsunami caused 181 fatalities and displaced more than 5000 people on the islands of Samoa, American Samoa, and Tonga. This is the first tsunami to cause significant damage and fatalities on U.S. soil in more than 30 years. Scientists from around the world quickly mobilized to help document the tsunami water levels before this ephemeral data was forever lost as recovery activities and natural processes overtook the effected area. A USGS team collected data in American Samoa from October 6-22 and November 5-12, 2009. The tsunami was large, reaching elevations of greater than 15 m, however wave heights and devastation varied from village to village in American Samoa. Even within villages, some structures were completely destroyed, some flooded and left standing, and others barely touched. Wave heights, flow depths, runup heights, inundation distances, and flow directions were collected for use in ground-truthing inundation models. The team also collected nearshore bathymetry, topography and reef flat elevation, sediment samples, and documented the distribution and characteristics of both sand and boulder deposits. Eyewitness accounts of the tsunami were also videotaped. One striking aspect of this tsunami was the abundance of indicators of strong return flow. For example at Poloa in the northwest of Tutuila, where the runup was greater than 11 m along a 300-m stretch of coast and flow depths exceeded 4 m, the coral reef flat was strewn with debris including chairs, desks, and books from a school. On land, River channels were excavated and new channels formed as return flow scoured sediment and transported it offshore. Possible causes for the strong return flow and the relation between the stength of the return flow, inundation distance, and runup in American Samoa are presented. These relationships and others based on data collected by field survey teams will ultimately reduce loss of life and destruction from tsunamis in the Pacific and

  1. Irish return migration in the nineteenth century.

    Science.gov (United States)

    Hart, M

    1985-01-01

    This study is concerned with return migration to Ireland from the United States during the nineteenth century. The author first notes that the rate of return migration was relatively low. Reasons for returning are then considered, including inheritance and poor health. Data on 671 Irish returnees from passenger lists of ships arriving in the United Kingdom from the United States between 1858 and 1867 are analyzed with regard to sex, marital status, age, occupations, and impact of returnees.

  2. Risk/Return Performance of Diversified Firms

    OpenAIRE

    Richard A. Bettis; Vijay Mahajan

    1985-01-01

    Based on a sample of 80 firms, this paper examines the risk/return performance of related and unrelated diversified firms at the level of accounting data. The results suggest that although on the average related diversified firms outperform unrelated diversified firms, related diversification offers no guarantee of a favorable risk/return performance. (Many low performers are related diversifiers.) In fact, different diversification strategies can result in similar risk/return performance. Ho...

  3. Survey Expectations

    OpenAIRE

    Martin Weale

    2005-01-01

    This paper focusses on survey expectations and discusses their uses for testing and modeling of expectations. Alternative models of expectations formation are reviewed and the importance of allowing for heterogeneity of expectations is emphasized. A weak form of the rational expectations hypothesis which focusses on average expectations rather than individual expectations is advanced. Other models of expectations formation, such as the adaptive expectations hypothesis, are briefly discussed. ...

  4. Survey Expectations

    OpenAIRE

    Pesaran, M.H.; Weale, M.

    2005-01-01

    This paper focuses on survey expectations and discusses their uses for testing and modeling of expectations. Alternative models of expectations formation are reviewed and the importance of allowing for heterogeneity of expectations is emphasized. A weak form of the rational expectations hypothesis which focuses on average expectations rather than individual expectations is advanced. Other models of expectations formation, such as the adaptive expectations hypothesis, are briefly discussed. Te...

  5. Survey expectations

    OpenAIRE

    Pesaran, Mohammad Hashem; Weale, Martin R.

    2005-01-01

    This paper focuses on survey expectations and discusses their uses for testing and modeling of expectations. Alternative models of expectations formation are reviewed and the importance of allowing for heterogeneity of expectations is emphasized. A weak form of the rational expectations hypothesis which focuses on average expectations rather than individual expectations is advanced. Other models of expectations formation, such as the adaptive expectations hypothesis, are briefly discussed. Te...

  6. The Bubbles of China Stock Market Based on Return Decomposition and Cumulative Return

    Institute of Scientific and Technical Information of China (English)

    ZHANG Xiao-xia; WU Chong-feng

    2006-01-01

    Using Capital Asset Pricing Model Integrating both Firm and Market (CAPMIFM), we first decompose the asset return into two components. One is called the fundamental return,which is related to the intrinsic value of the asset. The other is called bubble return, which is derived from the asset bubbles. Then a stock bubble return model bused on cumulative return is proposed. The model exhibits characterizing log-periodic oscillations and a power law acceleration of the cumulative return. Empirical results suggest that the model has a good fit for the bubbles of China stock market.

  7. Bulgarian Turkish emigration and return.

    Science.gov (United States)

    Vasileva, D

    1992-01-01

    The main factors which determined the 1989 migration of Turks in Bulgaria back to Turkey are discussed. Background history is provided. After World War I, Turks in bulgaria comprised 10% of the total population. Bulgarian policy had been, up to the 1980s to send Rumelian Turks back, but the policy after 1980 was one of a national revival process to integrate Turks into the developed socialist society. Muslim traditions, customs, and Turkish language were interfered with. International disfavor resulted. In May 1989, the Communist Party declared, in an effort to show democratic ideals, open borders. Thus began the new emigration wave. 369,839 people fled to the Turkish border. 43% of the 9.47 ethnic Turks in bulgaria went to Turkey within 4 months. The numbers decreased in November, and soon after the communist regime ended. New laws were adopted allowing Turks to assume their original Turkish names. The huge migration was clearly political, and as such, the emigrant Turks should be determined as refugees and asylum seekers. The provocation of ethnic Turks was used by the communist regime to solve potential social conflicts. Not only did Turks flee to escape from violence or for religious, cultural, and moral reasons but also due to free market initiatives begun in Turkey in the early 1980s which improved Turkish quality of life. Food and consumer goods were cheaper and economic advantages were perceived. Emigrants were primarily peasants with lower levels of education, professional qualifications, and labor skills. 154,937 (42%) returned to bulgaria and 58% stayed in Turkey to comprise 25% of the former Turkish population. During this period, tensions between countries was high.l Bulgarians actively encouraged emigration and Turkey welcomed it. The emigrants to Turkey were seen as foreigners (muhacir or gocmen) but were received with good will and were readily accepted into menial positions. Emigrants were confronted with political, linguistic, and cultural

  8. Illness in the Returned International Traveler.

    Science.gov (United States)

    Sanford, Christopher A; Fung, Claire

    2016-03-01

    Familiarity with the distribution, mode of transmission, and risk factors for acquisition of illnesses commonly transmitted to travelers to low-income nations can help guide clinicians in their work-up of an ill returned traveler. The 3 most common categories of illness in returned international travelers are gastrointestinal illness, fever, and dermatoses. Diarrhea is the most common illness reported in returned international travelers. Fever is a marker of a potentially significant illness; work-up of the ill febrile returned traveler should be conducted promptly. Copyright © 2016 Elsevier Inc. All rights reserved.

  9. 27 CFR 479.51 - Fraudulent return.

    Science.gov (United States)

    2010-04-01

    ... EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Special (Occupational) Taxes Penalties and Interest § 479.51 Fraudulent return. If...

  10. Asset Return Dynamics under Bad Environment Good Environment Fundamentals

    OpenAIRE

    2009-01-01

    We introduce a "bad environment-good environment" technology for consumption growth in a consumption- based asset pricing model. Using the preference structure from Campbell and Cochrane (1999), the model generates realistic time-varying volatility, skewness and kurtosis in fundamentals while still permitting closed-form solutions for asset prices. The model not only fits standard salient asset prices features including means and volatilities for equity returns and risk free rates, but also g...

  11. Risk analysis of earth return options for the Mars rover/sample return mission

    Science.gov (United States)

    1988-01-01

    Four options for return of a Mars surface sample to Earth were studied to estimate the risk of mission failure and the risk of a sample container breach that might result in the release of Martian life forms, should such exist, in the Earth's biosphere. The probabilities calculated refer only to the time period from the last midcourse correction burn to possession of the sample on Earth. Two extreme views characterize this subject. In one view, there is no life on Mars, therefore there is no significant risk and no serious effort is required to deal with back contamination. In the other view, public safety overrides any desire to return Martian samples, and any risk of damaging contamination greater than zero is unacceptable. Zero risk requires great expense to achieve and may prevent the mission as currently envisioned from taking place. The major conclusion is that risk of sample container breach can be reduced to a very low number within the framework of the mission as now envisioned, but significant expense and effort, above that currently planned is needed. There are benefits to the public that warrant some risk. Martian life, if it exists, will be a major discovery. If it does not, there is no risk.

  12. Contributors Form

    Directory of Open Access Journals (Sweden)

    Chief Editor

    2016-06-01

    to produce preprints or reprints and translate into languages other than English for sale or free distribution; and 4 the right to republish the work in a collection of articles in any other mechanical or electronic format. We give the rights to the corresponding author to make necessary changes as per the request of the journal, do the rest of the correspondence on our behalf and he/she will act as the guarantor for the manuscript on our behalf. All persons who have made substantial contributions to the work reported in the manuscript, but who are not contributors, are named in the Acknowledgment and have given me/us their written permission to be named. If I/we do not include an Acknowledgment that means I/we have not received substantial contributions from non-contributors and no contributor has been omitted.S NoAuthors' NamesContribution (IJCME Guidelines{1 substantial contributions to conception and design, acquisition of data, or analysis and interpretation of data; 2 drafting the article or revising it critically for important intellectual content; and 3 final approval of the version to be published. Authors should meet conditions 1, 2, and 3}.SignatureDate                              Note: All the authors are required to sign independently in this form in the sequence given above. In case an author has left the institution/country and whose whereabouts are not known, the senior author may sign on his/her behalf taking the responsibility.No addition/deletion/ or any change in the sequence of the authorship will be permissible at a later stage, without valid reasons and permission of the Editor.If the authorship is contested at any stage, the article will be either returned or will not be processed for publication till the issue is solved.Maximum up to 4 authors for short communication and up to 6 authors for original article.

  13. Time-bound product returns and optimal order quantities for mass merchandisers

    Science.gov (United States)

    Yu, Min-Chun; Goh, Mark

    2012-01-01

    The return guidelines for a mass merchandiser usually entail a grace period, a markdown on the original price and the condition of the returned items. This research utilises eight scenarios formed from the variation of possible return guidelines to model the cost functions of single-product categories for a typical mass merchandiser. Models for the eight scenarios are developed and solved with the objective of maximising the expected profit so as to obtain closed form solutions for the associated optimal order quantity. An illustrative example and sensitivity analysis are provided to demonstrate the applicability of the model. Our results show that merchandisers who allow for returns within a time window, albeit with a penalty cost imposed and the returned products being recoverable, should plan for larger order amounts as such products do not affect the business. Similarly, the merchandisers who allow for returns beyond a grace period and without any penalty charges, but where the returned products are irrecoverable, should manage their stocks in this category more judiciously by ordering as little as possible so as to limit the number of returns and carefully consider the effects of their customer satisfaction-guaranteed policies, if any.

  14. PRODUCT RETURNS MANAGEMENT IN THE CLOTHING INDUSTRY IN POLAND

    Directory of Open Access Journals (Sweden)

    Anna Maria Jeszka

    2014-12-01

    Full Text Available Background: The aim of this study is to identify and define on the basis of the literature the principal external and organizational factors and check to what extent they affect the efficiency of returns management as well as any resultant savings. The author proposes a conceptual model which correlates the results of returns management as well as savings with the main determinants identified on the basis of the literature. Then, in the operationalisation phase of the model, the dependent and independent variables were defined in the form of constructs. In accordance with the adopted model, individual constructs were measured based on standardised interviews. Materials and methods:  The results of returns management and any savings generated by this process are affected by certain determinants which are described in the literature. The adopted model included external factors, such as the cooperation of retailers with logistics operators and suppliers, the exchange of information in the supply chain, and organizational behaviour (experience of employees; as well as organizational factors related to the flow of information and IT systems. Due to financial and organisational restrictions, the originally planned representative sample of retail chains was limited to the regions of Wielkopolska and Lubuskie. In the end, 105 interviews were analysed. Results:  The results obtained in the research sample confirm assumptions about the possible potential savings that can be achieved as a result of appropriately conducted corporate policies in the area of reverse logistics. A correlation was also revealed between the experience and competencies of staff and the efficiency of returns management. Conclusions: Research into the factors affecting the efficiency of returns management and any savings resulting from returns management policies have not been conducted in Poland to date. The present study contributes to the growing trend of research into the

  15. 75 FR 38183 - Proposed Collection; Comment Request for Form 8916

    Science.gov (United States)

    2010-07-01

    ... Schedule M-3 Taxable Income with Tax Return Taxable Income for Mixed Groups. DATES: Written comments should... Income with Tax Return Taxable Income for Mixed Groups. OMB Number: 1545-2062. Form Number: Form 8916... information collections, as required by the Paperwork Reduction Act of 1995, Public Law 104-13 (44 U.S.C. 3506...

  16. The Relevance of Organization Capital for Market Capital Returns

    DEFF Research Database (Denmark)

    Bleoca, Lavinia

    2014-01-01

    This paper extends the existing findings on the theory of “organization capital” proposed by Lev at al. (2009) through a reproduction analysis on newer data, with a different estimation method. A new empirical perspective is proposed, where the intrinsic relationship of the different profitability...... measures is analyzed in order to offer a survey over the average firm’s capacity of generating excess returns in relation to the closest neighbor, based on its uniqueness. Nevertheless, the analysis seeks to define how profitable unique skills and knowledge are in comparison to the companion portfolio...

  17. Return-to-Work Program for Injured Workers: Factors of Successful Return to Employment.

    Science.gov (United States)

    Awang, Halimah; Shahabudin, Sharifah Muhairah; Mansor, Norma

    2016-11-01

    This study examined the factors of successful return to employment among participants in the return to work program (RTW) following work-related injury. Data were obtained from the Social Security Organization database containing 9850 injured workers who underwent RTW in 2010 to 2013. About 65% had successfully returned to employment. Significant factors of successful return include gender, employer interest, motivation, age, intervention duration, and type of injury. Male and motivated employees were more likely to return to employment compared with female and unmotivated employees, respectively. Participants from interested employers were 23.22 times more likely to return to work than those from uninterested employers, whereas participants whose intervention period exceeded 5 months were 41% less likely to return to work compared with those whose intervention period was within 3 months. Appropriate strategy and enhanced collaboration between the stakeholders would improve the proportion of successful return to employment. © 2016 APJPH.

  18. The Effects of Twitter Sentiment on Stock Price Returns.

    Science.gov (United States)

    Ranco, Gabriele; Aleksovski, Darko; Caldarelli, Guido; Grčar, Miha; Mozetič, Igor

    2015-01-01

    Social media are increasingly reflecting and influencing behavior of other complex systems. In this paper we investigate the relations between a well-known micro-blogging platform Twitter and financial markets. In particular, we consider, in a period of 15 months, the Twitter volume and sentiment about the 30 stock companies that form the Dow Jones Industrial Average (DJIA) index. We find a relatively low Pearson correlation and Granger causality between the corresponding time series over the entire time period. However, we find a significant dependence between the Twitter sentiment and abnormal returns during the peaks of Twitter volume. This is valid not only for the expected Twitter volume peaks (e.g., quarterly announcements), but also for peaks corresponding to less obvious events. We formalize the procedure by adapting the well-known "event study" from economics and finance to the analysis of Twitter data. The procedure allows to automatically identify events as Twitter volume peaks, to compute the prevailing sentiment (positive or negative) expressed in tweets at these peaks, and finally to apply the "event study" methodology to relate them to stock returns. We show that sentiment polarity of Twitter peaks implies the direction of cumulative abnormal returns. The amount of cumulative abnormal returns is relatively low (about 1-2%), but the dependence is statistically significant for several days after the events.

  19. The Effects of Twitter Sentiment on Stock Price Returns.

    Directory of Open Access Journals (Sweden)

    Gabriele Ranco

    Full Text Available Social media are increasingly reflecting and influencing behavior of other complex systems. In this paper we investigate the relations between a well-known micro-blogging platform Twitter and financial markets. In particular, we consider, in a period of 15 months, the Twitter volume and sentiment about the 30 stock companies that form the Dow Jones Industrial Average (DJIA index. We find a relatively low Pearson correlation and Granger causality between the corresponding time series over the entire time period. However, we find a significant dependence between the Twitter sentiment and abnormal returns during the peaks of Twitter volume. This is valid not only for the expected Twitter volume peaks (e.g., quarterly announcements, but also for peaks corresponding to less obvious events. We formalize the procedure by adapting the well-known "event study" from economics and finance to the analysis of Twitter data. The procedure allows to automatically identify events as Twitter volume peaks, to compute the prevailing sentiment (positive or negative expressed in tweets at these peaks, and finally to apply the "event study" methodology to relate them to stock returns. We show that sentiment polarity of Twitter peaks implies the direction of cumulative abnormal returns. The amount of cumulative abnormal returns is relatively low (about 1-2%, but the dependence is statistically significant for several days after the events.

  20. Returning to work after stroke: a review.

    Science.gov (United States)

    Wolfenden, Barbara; Grace, Marty

    2009-06-01

    This review focuses on the experiences and rehabilitation needs of working age, higher functioning stroke survivors in relation to their 'return to work'. It grew out of the poststroke experience of one of the authors and her realization of the inadequacy of services to facilitate return to work and optimal recovery from stroke. The authors' aim is to present a practice-oriented review that can provide information for future practice and research. Returning to work and sustaining employment are considered key aspects of rehabilitation and recovery by younger stroke survivors. From a psychosocial perspective, successful return to work can enhance recovery and life satisfaction by consolidating self-esteem, confidence and social identity. However, even higher functioning stroke survivors with minimal or no obvious physical disability may experience workplace challenges relating to their neurological condition. Appropriate rehabilitation would include specific preparation for return to work, education within the workplace to facilitate return to work, participation by the stroke survivor in all aspects of the management of their return to work, and an ongoing role for a stroke educator/workplace advocate. In conclusion, further research is required in this area to support stroke survivors in returning to and maintaining employment to achieve their poststroke potential. Thirteen recommendations arising from the existing literature and the lived experience of one of the authors are presented at the end of the review.

  1. Return migration to Italy and labour migration.

    Science.gov (United States)

    Calvaruso, C

    1983-01-01

    The problems caused by large-scale return migration to Italy in recent years are considered. The importance of the additional skills and capital acquired by these migrants while abroad is stressed. Extensive data on the volume of return migration in the 1970s are included.

  2. Economic and accounting rates of return

    NARCIS (Netherlands)

    Feenstra, D.W.; Wang, H.

    2000-01-01

    The rate of return on invested capital is a central concept in financial analysis. The purpose of calculating the rate of return on investment in general is to measure the financial performance, to assess the desirability of a project and to make decisions on the valuation of firms. Financial statem

  3. Excess Asset Returns and Limited Enforcement

    OpenAIRE

    Lambertini, Luisa; Azariadis, Costas

    2002-01-01

    This paper investigates the effect of limited enforcement of contracts on asset returns in a three-period pure- exchange overlapping generations economy. We consider a life-cycle setting with a safe and a risky asset and find that lack of commitment can significantly affect the rate of returns of these assets and possibly generate large equity premia.

  4. Oil Volatility Risk and Expected Stock Returns

    DEFF Research Database (Denmark)

    Christoffersen, Peter; Pan, Xuhui (Nick)

    After the financialization of commodity futures markets in 2004-05 oil volatility has become a strong predictor of returns and volatility of the overall stock market. Furthermore, stocks' exposure to oil volatility risk now drives the cross-section of expected returns. The difference in average r...

  5. Legal institutions, strategic default, and stock returns

    NARCIS (Netherlands)

    Favara, G.; Schroth, E.; Valta, P.

    2008-01-01

    This paper studies the impact of legal institutions on stock returns. More specifically, we examine how differences in debt enforcement and creditor protection around the world affect stock returns of individual firms. We hypothesize that if legal institutions prevent shareholders from engaging in

  6. Aggregate Unemployment Decreases Individual Returns to Education

    Science.gov (United States)

    Ammermueller, Andreas; Kuckulenz, Anja; Zwick, Thomas

    2009-01-01

    Aggregate unemployment may affect individual returns to education through qualification-specific responses in participation and wage bargaining. This paper shows that an increase in regional unemployment by 1% decreases returns to education by 0.005 percentage points. This implies that higher skilled employees are better sheltered from labour…

  7. The Returns to Quality in Graduate Education

    Science.gov (United States)

    Stevenson, Adam

    2016-01-01

    This paper estimates the monetary return to quality in US graduate education, controlling for cognitive ability and self-selection across award level, program quality, and field-of-study. In most program types, I cannot reject the hypothesis of no returns to either degree completion or program quality. Important exceptions include master's…

  8. Return to Experience and Initial Wage Level

    DEFF Research Database (Denmark)

    Sørensen, Kenneth Lykke; Vejlin, Rune Majlund

    This paper estimates the relationship between initial wage and return to experience. We use a Mincer-like wage model to nonparametrically estimate this relationship allowing for an unobservable individual permanent effect in wages and unobservable individual return to experience. The relationship...

  9. Return to experience and initial wage level

    DEFF Research Database (Denmark)

    Sørensen, K.L.; Vejlin, R.

    2014-01-01

    This paper estimates the relationship between initial wage and return to experience. We use a Mincer-like wage model to non-parametrically estimate this relationship allowing for an unobservable individual permanent effect in wages and unobservable individual return to experience. The relationshi...

  10. 27 CFR 41.112 - Tax return.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2010-04-01 2010-04-01 false Tax return. 41.112 Section 41.112 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF... States Deferred Payment of Tax in Puerto Rico on Tobacco Products § 41.112 Tax return. The...

  11. Oil Volatility Risk and Expected Stock Returns

    DEFF Research Database (Denmark)

    Christoffersen, Peter; Pan, Xuhui (Nick)

    After the financialization of commodity futures markets in 2004-05 oil volatility has become a strong predictor of returns and volatility of the overall stock market. Furthermore, stocks' exposure to oil volatility risk now drives the cross-section of expected returns. The difference in average r...

  12. Anomalous pulmonary venous return: A case report

    Energy Technology Data Exchange (ETDEWEB)

    Park, Gyeong Min; Kang, MinJin; Lee, Han Bee; Bae, Kyung Eun; Lee, Jaehe; Kim, Jae Hyung; Jeong, Myeong Ja; Kang, Tae Kyung [Sanggye Paik Hospital, Inje University College of Medicine, Seoul (Korea, Republic of)

    2013-10-15

    Partial anomalous pulmonary venous return is a type of congenital pulmonary venous anomaly. We present a rare type of partial pulmonary venous return, subaortic vertical vein drains left lung to superior vena cava, accompanying hypoplasia of the ipsilateral lung and pulmonary artery. We also review the previous report and relationship of these structures.

  13. PRODUCTION ELASTICITIES, RETURN TO SCALE AND ...

    African Journals Online (AJOL)

    thinkexploitsint'l

    A return to scale of 1.434 indicated increasing returns to scale. ... productivity gains in agricultural production (including yam production) are considered as ... selected using simple random sampling technique. .... household size of six persons, indicating that yam farmers in the study area had relatively low .... Sigma square.

  14. Social return bij inkoop door gemeenten

    NARCIS (Netherlands)

    Brouwer, P.; Smit, A.

    2011-01-01

    Social return is sterk in opkomst. De rijksoverheid heeft besloten om met ingang van 1 juli 2011 bij inkopen en aanbestedingen ‘social return’ als contractvoorwaarde op te nemen. Het Brabants Expertisecentrum Socialer Ondernemen (BESO) bracht in dezelfde periode de handleiding ‘Social return bij ink

  15. Aggregate Unemployment Decreases Individual Returns to Education

    Science.gov (United States)

    Ammermueller, Andreas; Kuckulenz, Anja; Zwick, Thomas

    2009-01-01

    Aggregate unemployment may affect individual returns to education through qualification-specific responses in participation and wage bargaining. This paper shows that an increase in regional unemployment by 1% decreases returns to education by 0.005 percentage points. This implies that higher skilled employees are better sheltered from labour…

  16. 75 FR 76940 - Specified Tax Return Preparers Required To File Individual Income Tax Returns Using Magnetic...

    Science.gov (United States)

    2010-12-10

    ... Internal Revenue Service 26 CFR Parts 1 and 301 RIN 1545-BJ52 Specified Tax Return Preparers Required To File Individual Income Tax Returns Using Magnetic Media; Correction AGENCY: Internal Revenue Service... provide further guidance relating to the requirement for ``specified tax return prepares,''. FOR...

  17. 76 FR 22611 - Specified Tax Return Preparers Required To File Individual Income Tax Returns Using Magnetic...

    Science.gov (United States)

    2011-04-22

    ... Internal Revenue Service 26 CFR Part 301 RIN 1545-BJ52 Specified Tax Return Preparers Required To File Individual Income Tax Returns Using Magnetic Media; Correction AGENCY: Internal Revenue Service (IRS...) providing guidance to specified tax return preparers who prepare and file individual income tax...

  18. Trends in return migration to the South.

    Science.gov (United States)

    Long, L H; Hansen, K A

    1975-11-01

    The rate of return migration to the South rose by nearly 19 percent between the late 1950's and the late 1960's and was an important factor in changing the South's overall migration pattern. But an increase in the rate of return migration was somewhat less important in changing Southern migration than (1) a decline in the rate of out-migration of native Southerners and (2) an increase in the rate at which non-Southern-born persons move to the South. The probability of former migrants returning to the South was over four times greater for whites than for blacks in the 1955-1960 period and three and one-fourth times greater in the 1965-1970 period. Since 1970 the rate of return migration has apparently continued to rise at a faster rate for blacks, but the black rate of return migration is still below the white rate.

  19. Habit formation, surplus consumption and return predictability

    DEFF Research Database (Denmark)

    Engsted, Tom; Hyde, Stuart; Vinther Møller, Stig

    2010-01-01

    -varying risk-free rate. In addition, we analyze the predictive power of the surplus consumption ratio for future stock and bond returns. We find that, although there are important cross-country differences and economically significant pricing errors, for the majority of countries in our sample the model gets...... empirical support in a variety of different dimensions, including reasonable estimates of risk-free rates. Further, for the majority of countries the surplus consumption ratio captures time-variation in expected returns. Together with the price-dividend ratio, the surplus consumption ratio contains...... significant information about future stock returns, also during the 1990s. In addition, in most countries the surplus consumption ratio is also a powerful predictor of future bond returns. Thus, the surplus consumption ratio captures time-varying expected returns in both stock and bond markets....

  20. Poetic Return in Afghanistan Persian Poem

    Directory of Open Access Journals (Sweden)

    Esmaeil Shafagh

    2012-11-01

    Full Text Available Abstract Poetic return movement was started by a group of poets like Moshtagh and Shole Esfehani in the second half of 12 century. Their goal was restoring Persian poem and deliverance of Hindi style decline. Esfahan’s poets initiative was considered only in Iran but in other Persian language and literature areas like India, Afghanistan and Transoxiana it was ignored. After the failure of constitutional Movement in Afghanistan, motion similar poetic return was happened that caused poetic themes, which had gone towards modernism, return to Hindi style again.The present paper attempts to analyze the poetic atmosphere in Afghanistan synchronous the poetic return movement in Iran and investigate socio- political backgrounds of return to Hindi style in Afghanistan after constitution failure.

  1. 关于八间房“吵子会”的探查与形态认知%Survey and Recognition of the “Chaozihui” Musical Form in Bajianfang Village

    Institute of Scientific and Technical Information of China (English)

    徐升; 刘一播

    2016-01-01

    吹打乐在我国民间比较盛行,尤其是在幅员广大的乡村。八间房村是河北省丰宁县潮河南岸的一个小村落,那里流行一种吹打乐——“吵子会”,它具有浓郁的乡土气息和满族音乐文化特色,乃是我国满族音乐里的一支奇葩。本文围绕八间房“吵子会”的乐器组合与演奏形式进行了深入研究,并借此期望八间房“吵子会”的音乐文化能够得到有益的解读和阐释,而被更多人认知。%Wind and percussion music is a popular form of folk music in China, especially in the vast rural areas. Bajianfang is a small village on the south bank of Chaohe River in Fengning County, Hebei Province. A unique wind and percussion musical form “Chaozihui” is found in the village, which has a strong lfavor of rural life and the musical features of the Manchu ethnic group. “Chaozihui” is a blossoming lfower in Manchu music. This article focuses on the survey and research of “Chaozihui” ensemble and performing forms. The article is written on the occasion that the Fengning County has succeeded in its efforts of being listed in the intangible cultural heritage and the Department of Music of Hebei Normal University for Nationalities has set up a special research project on the “Chaozihui”. As further discussion or supplement, it aims to help explain the “Chaozihui” musical culture and make it known by more people.

  2. Online Health Information-Seeking Behavior and Confidence in Filling Out Online Forms Among Latinos: A Cross-Sectional Analysis of the California Health Interview Survey, 2011-2012.

    Science.gov (United States)

    Gonzalez, Mariaelena; Sanders-Jackson, Ashley; Emory, Jason

    2016-07-04

    Health information is increasingly being disseminated online, but there is a knowledge gap between Latinos and non-Hispanic whites, particularly those whose English language proficiency is poor, in terms both of online health information-seeking behavior and computer literacy skills. This knowledge gap may also exist between US- and foreign-born Latinos. The specific aim of this study was to examine Internet use, online health information-seeking behavior, and confidence in filling out online forms among Latinos, particularly as it relates to health-risk behaviors. We then stratified our sample by nativity. We used the adult population file of the 2011-2012 California Health Interview Survey, analyzing Internet use, online health information-seeking behavior, and confidence in filling out online forms using binary logistic regression among Latinos and whites (N=27,289), Latinos (n=9506), and Latinos who use the Internet (n=6037). Foreign-born Latinos (OR 0.71, 95% CI 0.58-0.88, P=.002) have lower odds of engaging in online health information-seeking behavior, and higher odds (OR 2.90, 95% CI 2.07-4.06, Pinformation-seeking behavior and form confidence varied by nativity. Latinos, particularly foreign-born individuals, are at an increased risk of being left behind as the move to increase online content delivery and care expands. As online health information dissemination and online health portals become more popular, the impact of these sites on Latino gaps in coverage and care should be considered.

  3. Return migration to Eastern Kentucky and the stem family concept.

    Science.gov (United States)

    White, S E

    1987-01-01

    This research provides a conceptual framework--based on the stem family concept--with which to explore the cyclical nature of return migration to Eastern Kentucky. The work of Brown, Schwarzweller, and Mangalam shows how the stem family facilitates the outward movement of migrants during times of economic opportunity outside Appalachia, while providing a potential haven when sociocultural pulls within Appalachia exceed the economic tugs outside the region. Responses from 119 households in Laurel, Pike, and Powell counties are used to test hypotheses associated with the general model. The survey results support the continued existence of extreme stem family forces within Eastern Kentucky. Most immigrants are return migrants; return migration motives continue to be more related to sociocultural factors than they are job-related decisions. Most returnees are well below retirement age, and even the younger and more educated among these have a strong preference for remaining in Eastern Kentucky, although their historical tendency had been to move away when economic pulls are strong enough. The work of Brown, Schwarzweller, and Mangalam shows how the stem family facilitates the outward movement of migrants during times of economic opportunity outside Appalachia, while providing a potential haven when sociocultural pulls within Appalachia exceed the economic tugs outside the region. Overall, there is a need to better understand the role of awareness space in the destination selection of cyclical migrants.

  4. Race, socioeconomic status, and return migration to New Orleans after Hurricane Katrina.

    Science.gov (United States)

    Fussell, Elizabeth; Sastry, Narayan; Vanlandingham, Mark

    2010-01-01

    Hurricane Katrina struck New Orleans on the 29th of August 2005 and displaced virtually the entire population of the city. Soon after, observers predicted the city would become whiter and wealthier as a result of selective return migration, although challenges related to sampling and data collection in a post-disaster environment have hampered evaluation of these hypotheses. In this article, we investigate return to the city by displaced residents over a period of approximately 14 months following the storm, describing overall return rates and examining differences in return rates by race and socioeconomic status. We use unique data from a representative sample of pre-Katrina New Orleans residents collected in the Displaced New Orleans Residents Pilot Survey. We find that black residents returned to the city at a much slower pace than white residents even after controlling for socioeconomic status and demographic characteristics. However, the racial disparity disappears after controlling for housing damage. We conclude that blacks tended to live in areas that experienced greater flooding and hence suffered more severe housing damage which, in turn, led to their delayed return to the city. The full-scale survey of displaced residents being fielded in 2009-2010 will show whether the repopulation of the city was selective over a longer period.

  5. Ethnic differences in integration levels and return migration intentions: A study of Estonian migrants in Finland

    Directory of Open Access Journals (Sweden)

    Kristi Anniste

    2014-02-01

    Full Text Available Background: Immigrants' desire to stay in the host country or return to the country of origin depends largely on the balance between their degree of integration in the host country and their level of attachment to the country of origin. Ethnic diversity is growing rapidly in European countries, including in migrant-sending countries. It may be expected that members of the ethnic minority population and the majority population have different degrees of willingness to engage in return migration depending on their different levels of attachment to their country of origin. Objective: This study examines differences in the return migration intentions of members of the ethnic minority population and members of the majority population in the sending country. Specifically, we seek to answer two main research questions: (1 To what extent do members of the sending country's ethnic minority and majority groups differ in their desire to return to the sending country? (2 How does the degree of integration in the host country shape differences in the return migration intentions of members of the sending country's ethnic minority and majority groups? Methods: We use representative survey data on Estonian migrants in Finland and apply binary logistic regression on our data. Results: Results suggest that there are important differences in the integration levels and in the return migration intentions of the ethnic Estonians and the ethnic Russians from Estonia living in Finland. Despite being much better integrated into Finnish society than ethnic Russians, the ethnic Estonians are much more likely to want to return to Estonia. Indeed, our study shows that ethnicity is one of the most important personal characteristics predicting return migration. Conclusions: There is no obvious negative relationship between integration and return migration. Being a member of the sending country majority population is associated with a stronger intention to return, even when the

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

    OpenAIRE

    2014-01-01

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

  7. A Fatal Neuroinvasive West Nile Virus Infection in a Traveler Returning from Madagascar: Clinical, Epidemiological and Veterinary Investigations

    Science.gov (United States)

    Larrieu, Sophie; Cardinale, Eric; Ocquidant, Philippe; Roger, Matthieu; Lepec, Richard; Delatte, Hélène; Camuset, Guillaume; Desprès, Philippe; Brottet, Elise; Charlin, Cyril; Michault, Alain

    2013-01-01

    A 58-year-old woman living in Reunion Island and returning from Madagascar was hospitalized for neuroinvasive encephalitis and died 1 month later. West Nile virus (WNV) infection was biologically confirmed by detection of immunoglobulin M (IgM) reactive with WNV antigens in both cerebrospinal fluid and serum, and weak neutralizing activity was also detected. A veterinary survey performed in her traveling area showed a seroprevalence of WNV of 28.7% (95% confidence interval [CI] = 21.1–36.3) in adult poultry, confirming an active circulation of the virus. Development of a severe form could be related to a weak antibody response, because the patient presented low IgM and IgG titers. This case report underlines the constant risk of emergence of West Nile in Indian Ocean territories, including Reunion Island where competent vectors are widely present during the whole year. PMID:23751400

  8. Successful Return to Sport Following Distal Femoral Varus Osteotomy

    Science.gov (United States)

    Voleti, Pramod Babu; Degen, Ryan; Tetreault, Danielle; Krych, Aaron John; Williams, Riley J.

    2016-01-01

    Objectives: Distal femoral varus osteotomy is an effective treatment for unloading valgus knee malalignment; however, there is limited evidence on the ability for patients to return to athletics following this procedure. The purpose of this study is to report the functional outcomes and return to sport for athletic patients that underwent distal femoral varus osteotomy. Methods: A consecutive series of athletic patients that had undergone distal femoral varus osteotomy for symptomatic lateral compartment overload and valgus knee malalignment were prospectively reviewed. All patients had a minimum of 2-year follow-up. Radiographs were assessed to determine pre-operative and post-operative alignment. Details regarding sport of interest, ability to return to sport, and timing of return were obtained from the patients. Prospective institutional registries were utilized to collect pre-operative and post-operative Marx Activity Scale and International Knee Documentation Committee Subjective Knee Evaluation Form (IKDC) scores; these values were compared using paired t-tests with p allografts, 2 partial lateral meniscectomies, 1 lateral meniscus allograft transplantation, and 1 revision anterior cruciate ligament reconstruction. All patients were able to successfully return to their sport of choice (4 soccer, 2 softball, 2 running, 1 football, 1 basketball, 1 ice hockey, 1 volleyball, 1 rowing) at a mean of 11 months (range: 9-13). Furthermore, all 13 patients demonstrated an improvement in both Marx Activity Scale and IKDC scores after surgery. The mean improvement in Marx Activity Scale was 7 (mean pre-op: 4, mean post-op: 11, p ligamentous pathology is addressed. Therefore, distal femoral varus osteotomy should be considered in the athletic population for correction of symptomatic valgus knee malalignment.

  9. Reliability, return periods, and risk under nonstationarity

    Science.gov (United States)

    Read, Laura K.; Vogel, Richard M.

    2015-08-01

    Water resources design has widely used the average return period as a concept to inform management and communication of the risk of experiencing an exceedance event within a planning horizon. Even though nonstationarity is often apparent, in practice hydrologic design often mistakenly assumes that the probability of exceedance, p, is constant from year to year which leads to an average return period To equal to 1/p; this expression is far more complex under nonstationarity. Even for stationary processes, the common application of an average return period is problematic: it does not account for planning horizon, is an average value that may not be representative of the time to the next flood, and is generally not applied in other areas of water planning. We combine existing theoretical and empirical results from the literature to provide the first general, comprehensive description of the probabilistic behavior of the return period and reliability under nonstationarity. We show that under nonstationarity, the underlying distribution of the return period exhibits a more complex shape than the exponential distribution under stationary conditions. Using a nonstationary lognormal model, we document the increased complexity and challenges associated with planning for future flood events over a planning horizon. We compare application of the average return period with the more common concept of reliability and recommend replacing the average return period with reliability as a more practical way to communicate event likelihood in both stationary and nonstationary contexts.

  10. Stock return distribution in the BRICS

    Directory of Open Access Journals (Sweden)

    George Adu

    2015-12-01

    Full Text Available Stock returns in emerging market economies exhibit patterns that are distinctively different from developed countries: returns are noted to be highly volatile and autocorrelated, and long horizon returns are predictable. While these stylized facts are well established, the assumption underlying the distribution of returns is less understood. In particular, the empirical literature continues to rely on the normality assumption as a starting point, and most asset pricing models tend to overstretch this point. This paper questions the rationale behind this supposition and proceeds to test more formally for normality using multivariate joint test for skewness and kurtosis. Additionally, the paper extends the literature by examining a number of empirical regularities for Brazil, Russia, India, China and South Africa (the BRICS for short. Our main findings are that the distribution of stock returns for the BRICS exhibits peakedness with fatter and longer tails, and this is invariant to both the unit of measurement and the time horizon of returns. Volatility clustering is prevalent in all markets, and this decays exponentially for all but Brazil. The relationship between risk and return is found to be significant and risk premiums are prevalent in our sample.

  11. An efficient approach for Mars Sample Return using emerging commercial capabilities

    Science.gov (United States)

    Gonzales, Andrew A.; Stoker, Carol R.

    2016-06-01

    Mars Sample Return is the highest priority science mission for the next decade as recommended by the 2011 Decadal Survey of Planetary Science (Squyres, 2011 [1]). This article presents the results of a feasibility study for a Mars Sample Return mission that efficiently uses emerging commercial capabilities expected to be available in the near future. The motivation of our study was the recognition that emerging commercial capabilities might be used to perform Mars Sample Return with an Earth-direct architecture, and that this may offer a desirable simpler and lower cost approach. The objective of the study was to determine whether these capabilities can be used to optimize the number of mission systems and launches required to return the samples, with the goal of achieving the desired simplicity. All of the major element required for the Mars Sample Return mission are described. Mission system elements were analyzed with either direct techniques or by using parametric mass estimating relationships. The analysis shows the feasibility of a complete and closed Mars Sample Return mission design based on the following scenario: A SpaceX Falcon Heavy launch vehicle places a modified version of a SpaceX Dragon capsule, referred to as "Red Dragon", onto a Trans Mars Injection trajectory. The capsule carries all the hardware needed to return to Earth Orbit samples collected by a prior mission, such as the planned NASA Mars 2020 sample collection rover. The payload includes a fully fueled Mars Ascent Vehicle; a fueled Earth Return Vehicle, support equipment, and a mechanism to transfer samples from the sample cache system onboard the rover to the Earth Return Vehicle. The Red Dragon descends to land on the surface of Mars using Supersonic Retropropulsion. After collected samples are transferred to the Earth Return Vehicle, the single-stage Mars Ascent Vehicle launches the Earth Return Vehicle from the surface of Mars to a Mars phasing orbit. After a brief phasing period, the

  12. ANALISA DAMPAK PENGUMUMAN DIVIDEN TERHADAP RETURN, VARIABILITAS TINGKAT KEUNTUNGAN DAN AKTIVITAS VOLUME PERDAGANGAN SAHAM

    Directory of Open Access Journals (Sweden)

    Ratnawati - -

    2012-05-01

    Full Text Available ABSTRACT   Objective of this research is to ascertain whether the dividend announcement has impacts on return, security return variability and stock trading volume activity in the period surrounding the event. This research was conducted by using event study method with market adjusted model approach. The sample was 67 manufacturing companies announcing dividend between 2000-2001 and fulfilling sample criteria. The statistical test used is T-test: Paired Two Samples for Mean on the period before the event, at the moment of the event, and after the event. Statistical periods are applied to the extended periods (10 observation days and abridged periods (5 observation days. Results indicate that dividend announcement significantly influence return, abnormal return on the period before-after announcement, while the security return variability is significant on the period before-at the moment of announcement and after-at the moment of announcement. The results of the research for the abridged periods indicate that dividend announcement significantly influence stock return on the period before-after announcement, and the security return variability on the period at the moment-after the announcement and before-after the announcement. The variables of cumulative abnormal return (CAR, security return variability (SRV and trading volume activity (TVA on the 10 and 5 observation days do not indicate any significant difference. Cumulatively, the research provides a conclusion that there is not sufficient informational content in the dividend announcement. This can be seen from the inconsistent results gained from some variables and which indicating that the form of Indonesian capital market, especially Jakarta Stock Exchange, is not semi strong efficient yet. This is seen from the significant results gained from the tests of some variables. Keywords: Dividend Announcement, Return, Abnormal Return, SRV, TVA

  13. The Difficulties and Countermeasures of Migrant Workers Returning Home to Start Business of Shaanxi

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    The paper discloses the current situation of migrant workers returning home to start business by making a survey of the total number of returning migrant workers. The paper also points out the main difficulties the migrant workers who returning home to start business facing. The first is the old fashioned and backward concepts of development in some local departments; the second is lacking of powerful supports of policies; the third is the still bad environment to start business; the fourth is the lower qualities of people who are going to start business. Based on these situations, the official policies are put forward to encourage and support migrant workers to return home to start business. Such as strategies activating migrant workers to return home to start business should be positively operated; the management services should be further standardized and the environment should be perfected for starting business; the programs and items to start business by migrant workers returning home should be guided and favored; beneficial tax policies should be improved further; financial services should be further perfected; the land using problems of migrant workers should be firstly solved; the demonstration project of migrant workers returning back to start business should be continuously carried on; the organizing and leading jobs for starting business of migrant workers should be further strengthened.

  14. Dynamic Trading with Predictable Returns and Transaction Costs

    DEFF Research Database (Denmark)

    Garleanu, Nicolae; Heje Pedersen, Lasse

    We derive a closed-form optimal dynamic portfolio policy when trading is costly and security returns are predictable by signals with dierent mean-reversion speeds.The optimal strategy is characterized by two principles: 1) aim in front of the target and 2) trade partially towards the current aim....... Specically, the optimal updated portfolio is a linear combination of the existing portfolio and an \\aim portfolio," which is a weighted average of the current Markowitz portfolio (the moving target) and the expected Markowitz portfolios on all future dates (where the target is moving). Intuitively......, predictors with slower mean reversion (alpha decay) get more weight in the aim portfolio. We implement the optimal strategy for commodity futures and and superior net returns relative to more naive benchmarks....

  15. Exile, Return and Restitution in the Czech Republic

    Directory of Open Access Journals (Sweden)

    Katharine A Vadura

    2005-03-01

    Full Text Available The exile and return experiences in the Czech lands since 1918 have been various and have had significant implications for the people who live and once lived in that territory. The focus of this paper is on the Sudeten Germans a former minority of the Czech lands. The exile experience of this group has resulted in significant debate as to whether this form of exile as legislated banishment was expulsion or displacement, and whether they should have the right to return. In addition the question of guilt as a mechanism for invoking the forced transfer of a population has also raised the issue of recompense or restitution. Conceptual issues like nationalism, identity, belonging and the right to a homeland have played an important part in the attempts at the development of a stable state and also more recently reconciliation processes between the Czechs and Sudeten Germans.

  16. Returning to Work After Electrical Injuries

    DEFF Research Database (Denmark)

    Stergiou-Kita, M.; Mansfield, E.; Bayley, M.

    2014-01-01

    . The most common advice to others after electrical injuries included: 1) avoiding electrical injury; 2) feeling ready to return to work; 3) filing a Workplace Safety and Insurance Board injury/claims report; 4) proactive self-advocacy; and 5) garnering the assistance of individuals who understood electrical...... injuries to advocate on their behalf. Immediate and persistent physical, cognitive, psychosocial, and support factors can affect individuals' abilities to successfully return to work after an electrical injury. Specialized services and advocacy were viewed as beneficial to successful return to work....

  17. Oil Volatility Risk and Expected Stock Returns

    DEFF Research Database (Denmark)

    Christoffersen, Peter; Pan, Xuhui (Nick)

    After the financialization of commodity futures markets in 2004-05 oil volatility has become a strong predictor of returns and volatility of the overall stock market. Furthermore, stocks' exposure to oil volatility risk now drives the cross-section of expected returns. The difference in average...... return between the quintile of stocks with low exposure and high exposure to oil volatility is significant at 0.66% per month, and oil volatility risk carries a significant risk premium of -0.60% per month. In the post-financialization period, oil volatility risk is strongly related with various measures...

  18. The limits to stock return predictability

    OpenAIRE

    Robertson, D.; Wright, Stephen

    2009-01-01

    We examine predictive return regressions from a new angle. We ask what observable\\ud univariate properties of returns tell us about the “predictive space” that defines the true\\ud predictive model: the triplet ¡\\ud λ, R2\\ud x, ρ¢\\ud , where λ is the predictor’s persistence, R2\\ud x is the\\ud predictive R-squared, and ρ is the "Stambaugh Correlation" (between innovations in the\\ud predictive system). When returns are nearly white noise, and the variance ratio slopes\\ud downwards, the predictive...

  19. Expected Stock Returns and Variance Risk Premia

    DEFF Research Database (Denmark)

    Bollerslev, Tim; Zhou, Hao

    predicting high (low) future returns. The magnitude of the return predictability of the variance risk premium easily dominates that afforded by standard predictor variables like the P/E ratio, the dividend yield, the default spread, and the consumption-wealth ratio (CAY). Moreover, combining the variance...... risk premium with the P/E ratio results in an R2 for the quarterly returns of more than twenty-five percent. The results depend crucially on the use of "model-free", as opposed to standard Black-Scholes, implied variances, and realized variances constructed from high-frequency intraday, as opposed...

  20. Influence of Migrant Workers Returning to Hometown on the Changes of Village Social Structure

    Institute of Scientific and Technical Information of China (English)

    CHENG Wei; ZHANG Hong

    2012-01-01

    Based on field survey data of Village Z in Henan Province and from the perspective of the end of villages,we studied the influence of migrant workers returning to hometown on the changes of village social structure from village social interaction and village right reconstruction.Survey results show that social interaction centers of migrant workers returning to hometown for starting an undertaking move outside,which has exceeded the range of rural society of acquaintances and promoted the breaking of the traditional social relationship network " Differential Model of Association".In addition,migrant workers returning to hometown actively participate in building village rights and show more passionate political enthusiasm and practice of modern democratic concept.Furthermore,it not only speeds up disintegration of China’s small peasant economy and division of traditional farmers,but also is an important opportunity for realizing farmers’ self-ending and village ending,as well as urban and rural integration.

  1. Consumption of various forms of apples is associated with a better nutrient intake and improved nutrient adequacy in diets of children: National Health and Nutrition Examination Survey 2003–2010

    Directory of Open Access Journals (Sweden)

    Theresa A. Nicklas

    2015-10-01

    Full Text Available Background: Consumption of fruit has been associated with a variety of health benefits, yet, 75% of children have usual intakes of total fruit below minimum recommended amounts. Apples are the second most commonly consumed fruit in the United States; however, no studies have examined the impact of apple consumption on nutrient intake and adequacy in children's diets. Objective: The purpose of this study is to examine the association between apple (various forms consumption with nutrient intake and nutrient adequacy in a nationally representative sample of children. Design: Participants were children aged 2–18 years (n=13,339, from the National Health and Nutrition Examination Survey 2003–2010. Least square means of total energy and nutrient intake, and the percentage of the population below the estimated average requirement (EAR or above the adequate intake (AI among apple consumers and non-consumers were examined. Results: Consumers of total apple products had higher (p<0.01 total intakes of fiber, magnesium, and potassium and lower intakes of total fat, saturated fatty acids, monounsaturated fatty acid, and sodium than non-consumers. Apple consumers had higher (p<0.01 total sugar intake, but lower intake of added sugars compared to non-consumers. A lower (p<0.01 percentage of apple consumers were below the EAR for 13 of the 16 nutrients studied. Apple consumers had approximately a 10 percentage unit difference below the EAR for calcium and magnesium, and vitamins A, C, D, and E, than non-consumers. The percentage above the AI for fiber was significantly (p<0.0001 higher among total apple consumers (6.24±0.45 g compared to non-consumers (0.57±0.07 g. The results were similar for individual apple products (i.e. apple juice, applesauce, and whole apples. Conclusion: Consumption of any forms of apples provided valuable nutrients in the diets of children.

  2. The Labor Market Returns to a For-Profit College Education. NBER Working Paper No. 18343

    Science.gov (United States)

    Cellini, Stephanie Riegg; Chaudhary, Latika

    2012-01-01

    A lengthy literature estimating the returns to education has largely ignored the for-profit sector. In this paper, we offer some of the first causal estimates of the earnings gains to for-profit colleges. We rely on restricted-use data from the 1997 National Longitudinal Survey of Youth (NLSY97) to implement an individual fixed effects estimation…

  3. Teacher and Principal Perceptions of Authentic Leadership: Implications for Trust, Engagement, and Intention to Return

    Science.gov (United States)

    Bird, James J.; Wang, Chuang; Watson, Jim; Murray, Louise

    2012-01-01

    The focus of this study was to explore the relationships between the authentic leadership of building principals and the trust, engagement, and intention to return of their teaching staffs. School principals (n = 28) and their teaching staffs (n = 633) were surveyed. Teacher trust and engagement were found to be significantly related to principal…

  4. A Bull Market Gave Colleges 18% Return on Endowments in 1998.

    Science.gov (United States)

    van der Werf, Martin

    1999-01-01

    A national survey of 346 private and 162 public colleges found that the number of institution with billion-dollar endowments grew from 25 to 31, and that all responding institutions had at least some return on investments, ranging from 3.7% to 38% The greatest change was an increase in the amount of money invested in hedge funds. (MSE)

  5. The conditional returns to origin-country human capital among Turkish and Moroccan immigrants in Belgium

    NARCIS (Netherlands)

    Kanas, Agnieszka; van Tubergen, Frank

    2014-01-01

    This study extends the analysis of the economic returns to pre-migration human capital by examining the role of the receiving context, co-ethnic residential concentration, and post-migration investments in human capital. It uses large-scale survey data on Turkish and Moroccan immigrants in Belgium.

  6. The Labor Market Returns to a For-Profit College Education. NBER Working Paper No. 18343

    Science.gov (United States)

    Cellini, Stephanie Riegg; Chaudhary, Latika

    2012-01-01

    A lengthy literature estimating the returns to education has largely ignored the for-profit sector. In this paper, we offer some of the first causal estimates of the earnings gains to for-profit colleges. We rely on restricted-use data from the 1997 National Longitudinal Survey of Youth (NLSY97) to implement an individual fixed effects estimation…

  7. Participation and returns in rural nonfarm activities: evidence from the Kyrgyz Republic

    NARCIS (Netherlands)

    Atamanov, A.; Berg, van den M.M.

    2012-01-01

    This article uses two representative household budget surveys from the Kyrgyz Republic to analyze factors influencing participation and returns from different types of nonfarm activities in 2005 and 2006. We use the double hurdle and Heckman models, which allow us to demonstrate that a number of var

  8. The conditional returns to origin-country human capital among Turkish and Moroccan immigrants in Belgium

    NARCIS (Netherlands)

    Kanas, A.M.; Tubergen, F.A. van

    2014-01-01

    This study extends the analysis of the economic returns to pre-migration human capital by examining the role of the receiving context, co-ethnic residential concentration, and post-migration investments in human capital. It uses large-scale survey data on Turkish and Moroccan immigrants in Belgium.

  9. Narrative form

    CERN Document Server

    Keen, Suzanne

    2015-01-01

    This revised and expanded handbook concisely introduces narrative form to advanced students of fiction and creative writing, with refreshed references and new discussions of cognitive approaches to narrative, nonfiction, and narrative emotions.

  10. 47 CFR 65.600 - Rate of return reports.

    Science.gov (United States)

    2010-10-01

    ... 47 Telecommunication 3 2010-10-01 2010-10-01 false Rate of return reports. 65.600 Section 65.600... OF RETURN PRESCRIPTION PROCEDURES AND METHODOLOGIES Rate of Return Reports § 65.600 Rate of return...) months after the end of each calendar year, an annual rate of return monitoring report which shall be...

  11. Scientists Admitting to Plagiarism: A Meta-analysis of Surveys.

    Science.gov (United States)

    Pupovac, Vanja; Fanelli, Daniele

    2015-10-01

    We conducted a systematic review and meta-analysis of anonymous surveys asking scientists whether they ever committed various forms of plagiarism. From May to December 2011 we searched 35 bibliographic databases, five grey literature databases and hand searched nine journals for potentially relevant studies. We included surveys that asked scientists if, in a given recall period, they had committed or knew of a colleague who committed plagiarism, and from each survey extracted the proportion of those who reported at least one case. Studies that focused on academic (i.e. student) plagiarism were excluded. Literature searches returned 12,460 titles from which 17 relevant survey studies were identified. Meta-analysis of studies reporting committed (N = 7) and witnessed (N = 11) plagiarism yielded a pooled estimate of, respectively, 1.7% (95% CI 1.2-2.4) and 30% (95% CI 17-46). Basic methodological factors, including sample size, year of survey, delivery method and whether survey questions were explicit rather than indirect made a significant difference on survey results. Even after controlling for these methodological factors, between-study differences in admission rates were significantly above those expected by sampling error alone and remained largely unexplained. Despite several limitations of the data and of this meta-analysis, we draw three robust conclusions: (1) The rate at which scientists report knowing a colleague who committed plagiarism is higher than for data fabrication and falsification; (2) The rate at which scientists report knowing a colleague who committed plagiarism is correlated to that of fabrication and falsification; (3) The rate at which scientists admit having committed either form of misconduct (i.e. fabrication, falsification and plagiarism) in surveys has declined over time.

  12. The Adjustment of VaR to the Empirical Distribution of Returns

    Directory of Open Access Journals (Sweden)

    Radu Lupu

    2006-06-01

    Full Text Available Basel II Recommendations concerning internal rating based models approach for financial institutions and the success of RiskMetrics made Value-at-Risk (VaR is the most important risk measurement instrument at international level. The objective of this paper is to address the problem of adapting this method to the statistical properties of the returns for portfolios that include derivatives in the form of options too. We assume that the returns for the analyzed portfolios are not normally distributed. The methodologies presented are the ones used to capture the percentile when returns follow the features of the empirical distributions reviewed in Cont (2001.

  13. International return mobility, learning and knowledge transfer: a case study of Slovak doctors.

    Science.gov (United States)

    Williams, Allan M; Baláz, Vladimir

    2008-12-01

    International mobility provides opportunities for learning and knowledge transfer by health care workers, with significant potential benefits for countries of destination and, in the case of returned migration, countries of origin. This is examined using a typology that recognizes four types of tacit knowledge: embrained, embodied, embedded, and encultured. There are, however, constraints to learning and knowledge transfer in the form of professional and social recognition as well as language barriers and power relationships. These theoretical ideas are explored through a case study of internationally mobile Slovak doctors after their return to Slovakia. Individual learning and knowledge sharing with colleagues, both abroad and after return, are analysed through in-depth interviews.

  14. Psychometric evaluation of the Short Form 36 Health Survey (SF-36) and the World Health Organization Quality of Life Scale Brief Version (WHOQOL-BREF) for patients with schizophrenia.

    Science.gov (United States)

    Su, Chia-Ting; Ng, Hong-Son; Yang, Ai-Lun; Lin, Chung-Ying

    2014-09-01

    Quality-of-life (QoL) instruments measure the overall health status of people with schizophrenia, for whom the activities of daily life are often difficult. However, information on the psychometric properties of scores from the Short Form 36 Health Survey (SF-36) and the World Health Organization Quality of Life Scale Brief Version (WHOQOL-BREF), 2 commonly used generic QoL instruments in this population, is limited. Thus, we used a multitrait-multimethod analysis plus confirmatory factor analysis (CFA) to examine their psychometric properties. To test the reliability of their scores, we used methods of absolute reliability (standard error of measurement [SEM] and smallest real difference [SRD]) and relative reliability (i.e., intraclass correlation coefficient [ICC]). We recruited 100 patients with schizophrenia from a psychiatric hospital in southern Taiwan. All participants filled out the SF-36 and the WHOQOL-BREF at baseline and 2 weeks later. The participants' QoL scores were lower than those of the Taiwan general population (ps schizophrenia. The scores of both questionnaires were valid and reliable and detected different aspects of QOL in the population with schizophrenia. PsycINFO Database Record (c) 2014 APA, all rights reserved.

  15. 78 FR 70631 - Proposed Collection; Comment Request for Forms 8804, 8804 (Sch. A), 8805 and 8813

    Science.gov (United States)

    2013-11-26

    ..., the IRS is soliciting comments concerning Form 8804, Annual Return for Partnership Withholding Tax (Section 1446); Form 8804 (Sch. A), Penalty for Underpayment of Estimated Section 1446 Tax by Partnerships...: Form 8804, Annual Return for Partnership Withholding Tax (Section 1446); Form 8804 (Sch. A),...

  16. Assisting the return of displaced Dinka Bor

    Directory of Open Access Journals (Sweden)

    Paul Murphy

    2005-11-01

    Full Text Available The issues involved in supporting the return of internally displaced Dinka Bor communities highlight the complex, and often ignored, challenges of addressing the consequencesof South-South conflict.

  17. Expected Stock Returns and Variance Risk Premia

    DEFF Research Database (Denmark)

    Bollerslev, Tim; Zhou, Hao

    We find that the difference between implied and realized variation, or the variance risk premium, is able to explain more than fifteen percent of the ex-post time series variation in quarterly excess returns on the market portfolio over the 1990 to 2005 sample period, with high (low) premia...... predicting high (low) future returns. The magnitude of the return predictability of the variance risk premium easily dominates that afforded by standard predictor variables like the P/E ratio, the dividend yield, the default spread, and the consumption-wealth ratio (CAY). Moreover, combining the variance...... risk premium with the P/E ratio results in an R2 for the quarterly returns of more than twenty-five percent. The results depend crucially on the use of "model-free", as opposed to standard Black-Scholes, implied variances, and realized variances constructed from high-frequency intraday, as opposed...

  18. Fluctuation behaviors of financial return volatility duration

    Science.gov (United States)

    Niu, Hongli; Wang, Jun; Lu, Yunfan

    2016-04-01

    It is of significantly crucial to understand the return volatility of financial markets because it helps to quantify the investment risk, optimize the portfolio, and provide a key input of option pricing models. The characteristics of isolated high volatility events above certain threshold in price fluctuations and the distributions of return intervals between these events arouse great interest in financial research. In the present work, we introduce a new concept of daily return volatility duration, which is defined as the shortest passage time when the future volatility intensity is above or below the current volatility intensity (without predefining a threshold). The statistical properties of the daily return volatility durations for seven representative stock indices from the world financial markets are investigated. Some useful and interesting empirical results of these volatility duration series about the probability distributions, memory effects and multifractal properties are obtained. These results also show that the proposed stock volatility series analysis is a meaningful and beneficial trial.

  19. Parametric Return Density Estimation for Reinforcement Learning

    CERN Document Server

    Morimura, Tetsuro; Kashima, Hisashi; Hachiya, Hirotaka; Tanaka, Toshiyuki

    2012-01-01

    Most conventional Reinforcement Learning (RL) algorithms aim to optimize decision- making rules in terms of the expected re- turns. However, especially for risk man- agement purposes, other risk-sensitive crite- ria such as the value-at-risk or the expected shortfall are sometimes preferred in real ap- plications. Here, we describe a parametric method for estimating density of the returns, which allows us to handle various criteria in a unified manner. We first extend the Bellman equation for the conditional expected return to cover a conditional probability density of the returns. Then we derive an extension of the TD-learning algorithm for estimating the return densities in an unknown environment. As test instances, several parametric density estimation algorithms are presented for the Gaussian, Laplace, and skewed Laplace dis- tributions. We show that these algorithms lead to risk-sensitive as well as robust RL paradigms through numerical experiments.

  20. LITTERFALL AND NUTRIENT RETURNS IN ISOLATED STANDS ...

    African Journals Online (AJOL)

    Dr Osondu

    Keywords: Litterfall, Nutrient returns, Seasonal variation, Southern Nigeria, Terminalia catappa, Tropical rainforest. ... patterns of small-scale variation in resource .... Samples T-Test Analysis was employed to ... Source: Field work. Fig.

  1. Sample Return Systems for Extreme Environments Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Since the Apollo era, sample return missions have been primarily limited to asteroid sampling. More comprehensive sampling could yield critical information on the...

  2. Sample Return Systems for Extreme Environments Project

    Data.gov (United States)

    National Aeronautics and Space Administration — In Phase I we were able to demonstrate that sample return missions utilizing high velocity penetrators (0.1- 1 km/s) could provide substantial new capabilities for...

  3. Returning to sports after a back injury

    Science.gov (United States)

    ... to return to the sport with your doctor, physical therapist, or other health care providers? Have you been ... a contact sport, talk to your provider and physical therapist about whether you can do this safely. Contact ...

  4. Exploring Longitudinal Risk-return Relationships

    DEFF Research Database (Denmark)

    Andersen, Torben J.; Bettis, Richard A.

    2015-01-01

    We study a longitudinal fit model of adaptation and its association with the longitudinal risk-return relationship. The model allows the firm to adjust its position in response to partial learning about a changing environment characterized by two path-dependent processes—a random walk...... can lead to the inverse longitudinal risk-return relationships observed empirically. We discuss this apparent paradox and the possible resolution between mindless and conscious behavior as plausible causes of the longitudinal Bowman Paradox....

  5. Federal Securities Regulations and Stock Market Returns

    OpenAIRE

    Tung Liu; Gary Santoni; Courtenay Cliff Stone

    2008-01-01

    This paper examines the impact of federal securities statutes (seven major legislative acts and 535 amendments) on the mean and variance of total real U.S. stock market returns. In contrast to previous work, this study controls for the persistence of the variability of stock returns, employs a longer time period, utilizes a broader array of stocks and examines the impact of seven federal securities regulations and their selected amendments from 1933 through 2001. Despite the popular appeal of...

  6. A cosmopolitan return to nature

    DEFF Research Database (Denmark)

    Emontspool, Julie; Georgi, Carina

    2017-01-01

    This paper investigates how foodies’ adoption of New Nordic Food enables them to combine aesthetic and moral cosmopolitanism ideals. It demonstrates that consumers integrate aesthetic and moral cosmopolitan discourses through two complementary processes: the re-aesthetization of nature and the re......-moralization of the exotic. These processes combine in a cosmopolitan interest for one of the last unexplored foreign contexts: nature. The findings of this paper contribute to existing research by showing that moral cosmopolitanism reflects a more individualized and less engaged form of consumption than ethical consumption....... They illustrate how urban consumers perform distinction in contexts where nature is the most exotic unexplored context, highlighting further the reterritorialization of global cosmopolitan consumption, where food trends can only be consumed authentically in their context of origin. Finally, this paper shows how...

  7. The next US astronomy decadal survey

    Science.gov (United States)

    Burrows, Adam

    2017-07-01

    US astronomy decadal surveys advise government on how to optimize the scientific return on national investments in astronomy research. The 2020 survey will guide our community into the future, but current strains in an otherwise world-leading astronomy programme may affect this collective exercise.

  8. Assessment of Established Survey Protocols

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — A form and instructions for quickly and briefly assessing a previously (prior to 2013) reviewed or approved survey protocol for use as a National or Regional survey...

  9. Evolution of Rates of Return to Schooling in Tunisia: 1980-1999

    Directory of Open Access Journals (Sweden)

    Salma Zouari- Bouatour

    2014-12-01

    Full Text Available With reference to the theory of human capital, we estimate the Mincerian earnings functions based on individual data from national surveys of population and employment in 1980 and 1999. We show that the rates of return to education are, in 1980 and 1999, increasing proportionally with educational level. This growth of return rates means that the incentives for human capital accumulation continue to be strong. This result is general, it is observed for men and women, and in urban and rural areas. However, between 1980 and 1999, the average rate of return to education declined from 9.5% to 5.9%. Furthermore, this decline in the rates of return is general for all levels of education. This phenomenon affects the urban and rural areas as well as men and women. But the decline in the rate of return increases when the education level is low: the less the education level is, the bigger the decline in the rate of return is. This can result in a general deficiency in demand for labor by companies which seriously affects low qualified people. Following Heckman (1979, we re-estimate the earnings functions corrected for selection bias due to Mill's reversed ratio. The new findings of education return rates are superior to those obtained from the standard estimates. The results prove that education return rates increase when the education level increases; moreover, it explained the decline that happened between 1980 and 1999, which touched all education levels. However, the relative decrease in returns to education becomes larger in higher education levels; the lack of demand for labor would be felt more for the more educated.

  10. A Pedagogical Note on the Superiority of Price-Cap Regulation to Rate-of-Return Regulation

    Science.gov (United States)

    Currier, Kevin M.; Jackson, Brian K.

    2008-01-01

    The two forms of natural monopoly regulation that are typically discussed in intermediate microeconomics textbooks are marginal cost pricing and average cost pricing (rate-of-return regulation). However, within the last 20 years, price-cap regulation has largely replaced rate-of-return regulation because of the former's potential to generate more…

  11. Should Athletes Return to Activity After Cryotherapy?

    Science.gov (United States)

    Pritchard, Kimberly A.; Saliba, Susan A.

    2014-01-01

    Reference/Citation Bleakley CM, Costello JT, Glasgow PD. Should athletes return to sport after applying ice? A systematic review of the effect of local cooling on functional performance. Sports Med. 2012; 42(1):69–87. Clinical Question Does local tissue cooling affect immediate functional performance outcomes in a sport situation? Data Sources Studies were identified by searching MEDLINE, the Cochrane Central Register of Controlled Trials, and EMBASE, each from the earliest available record through April 2011. Combinations of 18 medical subheadings or key words were used to complete the search. Study Selection This systematic review included only randomized controlled trials and crossover studies published in English that examined human participants who were treated with a local cooling intervention. At least 1 functional performance outcome that was measured before and after a cooling intervention had to be reported. Excluded were studies using whole-body cryotherapy or cold-water immersion above the waist and studies that measured strength or force production during evoked muscle contraction. Data Extraction Data were extracted by 2 authors using a customized form to evaluate relevant data on study design, eligibility criteria, detailed characteristics of cooling protocols, comparisons, and outcome measures. Disagreement was resolved by consensus or third-party adjudication. To perform an intent-to-treat analysis when possible, data were extracted according to the original allocation groups, and losses to follow-up were noted. The review authors were not blinded to the study author, institution, or journal. For each study, mean differences or standardized mean differences and 95% confidence intervals were calculated for continuous outcomes using RevMan (version 5.1; The Nordic Cochrane Centre, Copenhagen, Denmark). Treatment effects were based on between-groups comparisons (cryotherapy versus control) using postintervention outcomes or within-group comparisons

  12. Should athletes return to activity after cryotherapy?

    Science.gov (United States)

    Pritchard, Kimberly A; Saliba, Susan A

    2014-01-01

    Bleakley CM, Costello JT, Glasgow PD. Should athletes return to sport after applying ice? A systematic review of the effect of local cooling on functional performance. Sports Med. 2012; 42(1):69-87. Does local tissue cooling affect immediate functional performance outcomes in a sport situation? Studies were identified by searching MEDLINE, the Cochrane Central Register of Controlled Trials, and EMBASE, each from the earliest available record through April 2011. Combinations of 18 medical subheadings or key words were used to complete the search. Study Selection : This systematic review included only randomized controlled trials and crossover studies published in English that examined human participants who were treated with a local cooling intervention. At least 1 functional performance outcome that was measured before and after a cooling intervention had to be reported. Excluded were studies using whole-body cryotherapy or cold-water immersion above the waist and studies that measured strength or force production during evoked muscle contraction. Data were extracted by 2 authors using a customized form to evaluate relevant data on study design, eligibility criteria, detailed characteristics of cooling protocols, comparisons, and outcome measures. Disagreement was resolved by consensus or third-party adjudication. To perform an intent-to-treat analysis when possible, data were extracted according to the original allocation groups, and losses to follow-up were noted. The review authors were not blinded to the study author, institution, or journal. For each study, mean differences or standardized mean differences and 95% confidence intervals were calculated for continuous outcomes using RevMan (version 5.1; The Nordic Cochrane Centre, Copenhagen, Denmark). Treatment effects were based on between-groups comparisons (cryotherapy versus control) using postintervention outcomes or within-group comparisons (precryotherapy versus postcryotherapy). If continuous data were

  13. Fri form

    DEFF Research Database (Denmark)

    Jensen, Henrik

    2006-01-01

    Dette Kompendiun er lavet i forbindelse med en workshop i møbeldesign. En række af form-Z's værktøjer til konstruktion af dobbeltkrumme flader gennemgås. Kompendiet kan bruges til selvstudie.......Dette Kompendiun er lavet i forbindelse med en workshop i møbeldesign. En række af form-Z's værktøjer til konstruktion af dobbeltkrumme flader gennemgås. Kompendiet kan bruges til selvstudie....

  14. Concussion in professional football: players returning to the same game--part 7.

    Science.gov (United States)

    Pellman, Elliot J; Viano, David C; Casson, Ira R; Arfken, Cynthia; Feuer, Henry

    2005-01-01

    A 6-year study was conducted to determine the signs, symptoms, and outcome of players who were concussed and either returned immediately or were rested and returned to the same game in the National Football League (NFL). From 1996 to 2001, concussions were recorded by NFL teams by use of a special standardized reporting form filled out by team physicians. Signs and symptoms were grouped by general symptoms, somatic complaints, cranial nerve effects, cognition problems, memory problems, and unconsciousness. Action taken after concussion was recorded for 887 patients. There were 135 players (15.2%) who returned immediately and 304 (34.3%) who rested and returned to the same game after concussion. There were few differences by player position or team activity about the injury or action taken. However, the mean number of signs and symptoms progressively increased from those who returned immediately (1.52), rested and returned to play (2.07), were removed from play (3.51), or were hospitalized (6.55). Immediate recall problems (odds ratio [OR], 1.93; confidence interval [CI], 1.26-2.94), memory problems (OR, 1.52; CI, 1.06-2.19), and the number of signs and symptoms (OR, 1.39; CI, 1.25-1.55) were predictive of removal from play or hospitalization. There was no statistical association between return to play in the same game and a subsequent concussion or a more serious concussion involving 7+ days out. Players who are concussed and return to the same game have fewer initial signs and symptoms than those removed from play. Return to play does not involve a significant risk of a second injury either in the same game or during the season. The current decision-making of NFL team physicians seems appropriate for return to the game after a concussion, when the player has become asymptomatic and does not have memory or cognitive problems.

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

    Directory of Open Access Journals (Sweden)

    Monika Bolek

    2014-08-01

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

  16. Temporal Oculomotor Inhibition of Return and Spatial Facilitation of Return in a Visual Encoding Task

    Directory of Open Access Journals (Sweden)

    Steven G Luke

    2013-07-01

    Full Text Available Oculomotor inhibition of return (O-IOR is an increase in saccade latency prior to an eye movement to a recently fixated location compared to other locations. It has been proposed that this temporal O-IOR may have spatial consequences, facilitating foraging by inhibiting return to previously attended regions. In order to test this possibility, participants viewed arrays of objects and of words while their eye movements were recorded. Temporal O-IOR was observed, with equivalent effects for object and word arrays, indicating that temporal O-IOR is an oculomotor phenomenon independent of array content. There was no evidence for spatial inhibition of return. Instead, spatial facilitation of return was observed: Participants were significantly more likely than chance to make return saccades and to refixate just-visited locations. Further, the likelihood of making a return saccade to an object or word was contingent on the amount of time spent viewing that object or word before leaving it. This suggests that, unlike temporal O-IOR, return probability is influenced by cognitive processing. Taken together, these results are inconsistent with the hypothesis that inhibition of return functions as a foraging facilitator. The results also provide strong evidence for a different oculomotor bias that could serve as a foraging facilitator: saccadic momentum, a tendency to repeat the most recently executed saccade program. We suggest that models of visual attention could incorporate saccadic momentum in place of inhibition of return.

  17. The heat transfer characteristics of lightning return stroke channel

    Science.gov (United States)

    Dong, Caixia; Yuan, Ping; Cen, Jianyong; Wang, Xuejuan; Mu, Yali

    2016-09-01

    Based on the time-resolved spectra of lightning return stroke processes, the evolutional characteristics of thermal conductivity and thermal diffusivity of the discharge channels are discussed. The distribution of temperature along the radial direction of channels at the peak current stage of return stroke is also investigated, and then the heat transferring characteristics along radial direction of the channels are analyzed. The results show that a temperature gradient along radial direction of lightning channel is formed due to the outward heat transfer. The closer the distance is to the current core channel, the greater the temperature gradient is and the more heat is transferred along the radial direction of the channel. The heat transferring in per unit length of the channel and per unit time is in the order of 104 J/m ṡ s at the initial moment of lightning return stroke. After the peak current, the channel temperature decreases slowly and the heat transport coefficients vary as a monotonically decreasing function.

  18. Automorphic Forms

    DEFF Research Database (Denmark)

    von Essen, Flemming Brændgaard

    systems. For automorphic forms wrt. Hecke triangle groups and Fuchsian groups with no elliptic elements and genus 0, we show that some logarithms of multiplier systems can be interpreted as a linking number. Finally we show a "twisted" version of the prime geodesics theorem, and logarithms of multiplier...

  19. Cosmic Forms

    CERN Document Server

    Kleman, Maurice

    2011-01-01

    The continuous 1D defects of an isotropic homogeneous material in an Euclidean 3D space are classified by a construction method, the Volterra process (VP). We employ the same method to classify the continuous 2D defects (which we call \\textit{cosmic forms}) of a vacuum in a 4D maximally symmetric spacetime. These defects fall into three different classes: i)- $m$-forms, akin to 3D space disclinations, related to ordinary rotations and analogous to Kibble's global cosmic strings (except that being continuous any deficit angle is allowed); ii)- $t$-forms, related to Lorentz boosts (hyperbolic rotations); iii)- $r$-forms, never been considered so far, related to null rotations. A detailed account of their metrics is presented. Their inner structure in many cases appears as a non-singular \\textit{core} separated from the outer part by a timelike hypersurface with distributional curvature and/or torsion, yielding new types of geometrical interactions with cosmic dislocations and other cosmic disclinations. Whereas...

  20. Optimization of return electrodes in neurostimulating arrays

    Science.gov (United States)

    Flores, Thomas; Goetz, Georges; Lei, Xin; Palanker, Daniel

    2016-06-01

    Objective. High resolution visual prostheses require dense stimulating arrays with localized inputs of individual electrodes. We study the electric field produced by multielectrode arrays in electrolyte to determine an optimal configuration of return electrodes and activation sequence. Approach. To determine the boundary conditions for computation of the electric field in electrolyte, we assessed current dynamics using an equivalent circuit of a multielectrode array with interleaved return electrodes. The electric field modeled with two different boundary conditions derived from the equivalent circuit was then compared to measurements of electric potential in electrolyte. To assess the effect of return electrode configuration on retinal stimulation, we transformed the computed electric fields into retinal response using a model of neural network-mediated stimulation. Main results. Electric currents at the capacitive electrode-electrolyte interface redistribute over time, so that boundary conditions transition from equipotential surfaces at the beginning of the pulse to uniform current density in steady state. Experimental measurements confirmed that, in steady state, the boundary condition corresponds to a uniform current density on electrode surfaces. Arrays with local return electrodes exhibit improved field confinement and can elicit stronger network-mediated retinal response compared to those with a common remote return. Connecting local return electrodes enhances the field penetration depth and allows reducing the return electrode area. Sequential activation of the pixels in large monopolar arrays reduces electrical cross-talk and improves the contrast in pattern stimulation. Significance. Accurate modeling of multielectrode arrays helps optimize the electrode configuration to maximize the spatial resolution, contrast and dynamic range of retinal prostheses.

  1. Reliability and validity of the medical outcomes study, a 36-item short-form health survey, (MOS SF-36 after one-year hospital discharge of hip fracture patient in a public hospital

    Directory of Open Access Journals (Sweden)

    Anan Udombhornprabha

    2012-07-01

    Full Text Available Introduction: There is scarce of data in terms of health-related quality of life for hip fracture patients in Thailand due to the following: (i lack of epidemiological aspects of hip fracture (eg. the relative incidence of osteoporosis, falls fractures and repeat fractures in particular subgroups, (ii lack of health status and quality of life aspects of both illness itself and the availability of different treatment options especially for elderly people. (iii a substantial variation in terms of outcomes of care for patients and service for hip fractures. Objective: Hip fracture is a major healthcare burden in Thailand. This study explores quality of life for hip fracture patients from perspective of (i Reliability of patient-reported outcomes (ii Some clinical and demographic characteristics related to patient-reported outcomes Method: Pre-hospital discharge 201 hip fracture patients were screened and follow-up over one year. Mail survey by a self-rated Medical Outcomes Study, a 36-item Short-Form Health Survey (Thai dispatched for follow-up, other clinical and demographic characteristics were collected through direct interviews from patients or caregivers during recruitment with simultaneous crosschecking from medical records. A descriptive cross-sectional analysis was performed.Result: Mails responder represented by 59.2% (N=119, with 36.1% (N=43 and 63.8% (N=76 for patient and caregiver rated outcomes. Mean(SD, [95% CI] score for physical, mental and global health of patient and care-giver rated outcomes of 36.2(10.6[32.9-39.4], 54.5(10.0[51.4-57.5],43.9(9.3[41.0-46.7], and 34.6(12.3[31.7-37.4], 52.5(12.3[49.6-55.3],42.7(11.1[40.1-45.2] were not statistically difference with p-value at 0.630,0.330 and 0.788 respectively. Respecting Cronbach’s alpha reliability coefficient by patients versus caregivers rated of the MOS SF-36 were 0.90 vs 0.91, 0.78 vs 0.84 and 0.90 vs 0.92. The presence of comorbidity significantly explains differences for

  2. Robust portfolio choice with ambiguity and learning about return predictability

    DEFF Research Database (Denmark)

    Larsen, Linda Sandris; Branger, Nicole; Munk, Claus

    2013-01-01

    We analyze the optimal stock-bond portfolio under both learning and ambiguity aversion. Stock returns are predictable by an observable and an unobservable predictor, and the investor has to learn about the latter. Furthermore, the investor is ambiguity-averse and has a preference for investment...... strategies that are robust to model misspecifications. We derive a closed-form solution for the optimal robust investment strategy. We find that both learning and ambiguity aversion impact the level and structure of the optimal stock investment. Suboptimal strategies resulting either from not learning...

  3. Robust Portfolio Choice with Ambiguity and Learning About Return Predictability

    DEFF Research Database (Denmark)

    Branger, Nicole; Larsen, Linda Sandris; Munk, Claus

    2013-01-01

    We analyze the optimal stock-bond portfolio under both learning and ambiguity aversion. Stock returns are predictable by an observable and an unobservable predictor, and the investor has to learn about the latter. Furthermore, the investor is ambiguity-averse and has a preference for investment...... strategies that are robust to model misspecifications. We derive a closed-form solution for the optimal robust investment strategy. We find that both learning and ambiguity aversion impact the level and structure of the optimal stock investment. Suboptimal strategies resulting either from not learning...

  4. Star formation history and chemical enrichment in the early Universe: clues from the rest-optical and rest-UV spectra of z~2-3 star-forming galaxies in the Keck Baryonic Structure Survey

    Science.gov (United States)

    Strom, Allison L.

    2017-01-01

    Galaxies at the peak of cosmic star formation (z~2-3) exhibit significantly higher star formation rates and gas fractions at fixed stellar mass than nearby galaxies. These z~2-3 galaxies are also distinct in terms of their nebular spectra, reflecting important differences not only in the physical conditions of their interstellar medium (e.g., electron density and gas-phase metallicity), but also in the details of their massive stellar populations, especially their ionizing radiation fields. Jointly observing galaxies' HII regions, at rest-UV and rest-optical wavelengths, and massive stars, at rest-UV wavelengths, is central to constructing a framework for understanding the differences between z~2-3 and z~0 star-forming galaxies and for self-consistently explaining the trends observed in the high-redshift population. My thesis is based on data from the Keck Baryonic Structure Survey (KBSS), which uniquely combines observations of individual galaxies in these two bandpasses. In total, the near-infrared component of the KBSS includes spectra of >700 z~2-3 galaxies obtained with Keck/MOSFIRE. I will present these results along with a detailed analysis of the full rest-optical (3600-7000 Ang) nebular spectra of ~400 galaxies, showing that high-redshift galaxies exhibit uniformly high degrees of ionization and excitation with respect to most z~0 galaxies. Combined with observations of the same galaxies' rest-UV spectra (obtained with Keck/LRIS) and photoionization model predictions, these results suggest that the disparity arises from differences in the shape of the ionizing radiation field at fixed gas-phase oxygen abundance, most likely due to the effects of Fe-poor massive binary stars. My comprehensive spectroscopic study of an unprecedentedly large sample of z~2-3 galaxies offers compelling evidence that the distinct chemical abundance patterns observed in these galaxies are the result of systematic differences in their star formation histories.

  5. DUST EXTINCTION FROM BALMER DECREMENTS OF STAR-FORMING GALAXIES AT 0.75 {<=} z {<=} 1.5 WITH HUBBLE SPACE TELESCOPE/WIDE-FIELD-CAMERA 3 SPECTROSCOPY FROM THE WFC3 INFRARED SPECTROSCOPIC PARALLEL SURVEY

    Energy Technology Data Exchange (ETDEWEB)

    Dominguez, A.; Siana, B.; Masters, D. [Department of Physics and Astronomy, University of California Riverside, Riverside, CA 92521 (United States); Henry, A. L.; Martin, C. L. [Department of Physics, University of California, Santa Barbara, CA 93106 (United States); Scarlata, C.; Bedregal, A. G. [Minnesota Institute for Astrophysics, University of Minnesota, Minneapolis, MN 55455 (United States); Malkan, M.; Ross, N. R. [Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA 90095 (United States); Atek, H.; Colbert, J. W. [Spitzer Science Center, Caltech, Pasadena, CA 91125 (United States); Teplitz, H. I.; Rafelski, M. [Infrared Processing and Analysis Center, Caltech, Pasadena, CA 91125 (United States); McCarthy, P.; Hathi, N. P.; Dressler, A. [Observatories of the Carnegie Institution for Science, Pasadena, CA 91101 (United States); Bunker, A., E-mail: albertod@ucr.edu [Department of Physics, Oxford University, Denys Wilkinson Building, Keble Road, Oxford, OX1 3RH (United Kingdom)

    2013-02-15

    Spectroscopic observations of H{alpha} and H{beta} emission lines of 128 star-forming galaxies in the redshift range 0.75 {<=} z {<=} 1.5 are presented. These data were taken with slitless spectroscopy using the G102 and G141 grisms of the Wide-Field-Camera 3 (WFC3) on board the Hubble Space Telescope as part of the WFC3 Infrared Spectroscopic Parallel survey. Interstellar dust extinction is measured from stacked spectra that cover the Balmer decrement (H{alpha}/H{beta}). We present dust extinction as a function of H{alpha} luminosity (down to 3 Multiplication-Sign 10{sup 41} erg s{sup -1}), galaxy stellar mass (reaching 4 Multiplication-Sign 10{sup 8} M {sub Sun }), and rest-frame H{alpha} equivalent width. The faintest galaxies are two times fainter in H{alpha} luminosity than galaxies previously studied at z {approx} 1.5. An evolution is observed where galaxies of the same H{alpha} luminosity have lower extinction at higher redshifts, whereas no evolution is found within our error bars with stellar mass. The lower H{alpha} luminosity galaxies in our sample are found to be consistent with no dust extinction. We find an anti-correlation of the [O III] {lambda}5007/H{alpha} flux ratio as a function of luminosity where galaxies with L {sub H{alpha}} < 5 Multiplication-Sign 10{sup 41} erg s{sup -1} are brighter in [O III] {lambda}5007 than H{alpha}. This trend is evident even after extinction correction, suggesting that the increased [O III] {lambda}5007/H{alpha} ratio in low-luminosity galaxies is likely due to lower metallicity and/or higher ionization parameters.

  6. HUBUNGAN RETURN SAHAM DAN INFLASI DI INDONESIA

    Directory of Open Access Journals (Sweden)

    Nyoman Triaryati

    2017-03-01

    Full Text Available The effect of inflation to the stock return research had been held since three decades ago based on GeneralizeFisher’s Hypotheses, but ‘how inflation influenced stock return’ had become a debate until today. In Indonesiamost of the related research used inflation as one of the variables that influenced stock return despite of others inshort period of time. This research investigated the effect of inflation to the stock return in Indonesia within fifteenyears, which was divided into 3 (three periods of time reflecting different economic growth for each of it. Thepurpose of this allotment was to see the consistency how inflation influenced the stock market. Using a secondarydata from monthly inflation and IHSG period 1998 until 2012, included three hundred and sixty observation,simple regression model analyses was applied. This research acknowledged that inflation negatively influencedstock return in a long time period, but it did not exist in the short time period, except when the level of inflationreached 10%. In conclusion, inflation influence on the stock return was not ascertained by how long the investigationwas held but if there was any inflation rate reaching 10% within the period of investigation.

  7. Exiting the Emergency Medical Services Profession and Characteristics Associated with Intent to Return to Practice.

    Science.gov (United States)

    Cash, Rebecca E; Crowe, Remle P; Agarwal, Riddhima; Rodriguez, Severo A; Panchal, Ashish R

    2017-06-28

    Inadequate staffing of agencies, increasing attrition rates, and frequent turnover of personnel make employee retention an ongoing concern for Emergency Medical Services (EMS). Faced with increasing demand for EMS, understanding the causes underlying turnover is critical. The objectives of this study were to describe the proportion of individuals that left EMS, likelihood of returning to the profession, and key factors contributing to the decision to leave EMS. This was a cross-sectional study of nationally-certified EMS professionals who left EMS. Respondents to a census survey who reported not practicing EMS were directed to a subsection of items regarding their choice to leave EMS. Demographic and employment characteristics, likelihood of returning to EMS, and factors influencing the decision to leave EMS were assessed. Descriptive and comparative statistics (Chi-square and nonparametric test of trend [p-trend]) and univariable odds ratios were calculated. The overall response rate for the full survey was 10% (n = 32,114). A total of 1247 (4%) respondents reported leaving the profession and completed the exit survey. The majority (72%) reported that they will likely return to EMS. A stepwise decrease in the reported likelihood of returning was seen with increasing years of EMS experience (e.g., 2 or less years of experience: 83%; 16 or more years: 52%; p-trend rate of approximately 4% among nationally certified EMS professionals; however, the majority reported that they intended to return to the EMS profession. Intention to return to EMS decreased as years of experience and months away from the profession increased. Important factors in the decision to leave EMS included a desire for better pay and benefits and the decision to pursue further education. Targeting the factors identified as important in this study should be a priority for key stakeholders in improving recruitment and retention of EMS professionals.

  8. Patient satisfaction and willingness to return to the provider among women undergoing gynecological surgery.

    Science.gov (United States)

    Schoenfelder, Tonio; Schaal, Tom; Klewer, Jörg; Kugler, Joachim

    2014-10-01

    To identify factors associated with 'patient satisfaction' and 'willingness to return to the provider' in gynecology and to assess similarities as well as differences between the two concepts. Study data were obtained from 968 randomly selected gynecology patients discharged from 22 hospitals who responded to a mailed survey. The validated instrument consisted of 37 items and assessed medical and service aspects of care, patient and visit characteristics. The dependent variables consisted of ratings of willingness to return to the provider and overall satisfaction. Bivariate and multivariate techniques were used to reveal relationships between indicators and both dependent variables. The multivariate analyses identified individualized medical care, kindness of medical practitioners, treatment outcome and organization of discharge as the most consistent predictors of the patients' likelihood to return and overall satisfaction. Differences between both concepts pertained to the significance of service variables (cleanliness and quality of food) for patient satisfaction and visit-related characteristics (length of stay and occurrence of complications) for willingness to return. Study findings suggest that patient satisfaction and willingness to return to the provider do not reflect the same concepts. Although service aspects such as quality of food influence satisfaction ratings, they do not increase the likelihood that patients choose the same hospital in case of another treatment. Communication between patients and medical practitioners is highly important. Revealed predictors of both concepts are alterable by healthcare professionals and should be focused on to enhance patient satisfaction and to increase the probability patients return to their provider.

  9. 77 FR 31913 - Proposed Collection; Comment Request for Form 7004

    Science.gov (United States)

    2012-05-30

    ... information collections, as required by the Paperwork Reduction Act of 1995, Public Law 104-13 (44 U.S.C. 3506... Extension of Time to File Certain Business Income Tax, Information, and Other Returns. DATES: Written... Certain Business Income Tax, Information, and Other Returns. OMB Number: 1545-0233. Form Number:...

  10. Consumer returns policies with endogenous deadline and supply chain coordination

    DEFF Research Database (Denmark)

    Xu, Lei; Li, Yongjian; Govindan, Kannan

    2015-01-01

    This paper considers returns policies under which consumers' valuation depends on the refund amount they receive and the length of time theymustwait after the item is returned. Consumers face an uncertain valuation before purchase, and the realization of that purchase's value occurs only after...... the return deadline has passed. Depending on the product lifecycle length and magnitude of return rate, a retailer decides on strategies for that product's return deadline, including return prohibition, life-cycle return, and fixed return deadline. In addition, the influence of the return deadline...... on consumers' behavior and the pricing and inventory policies of the retailer are systematically investigated. Moreover, based on the analysis of consumer return behavior on a traditional buy-back contract, we present a new differentiated buy-back contract, contingent on return deadline, to coordinate a supply...

  11. 76 FR 57803 - Proposed Collection; Comment Request for Form 14242

    Science.gov (United States)

    2011-09-16

    ...: Reporting Abusive Tax Promotions or Preparers. OMB Number: 1545-XXXX. Form Number: Form 14242. Abstract: The IC form is used to report an abusive tax avoidance scheme and tax return preparers who promote such...(c)(2)(A)). Currently, the IRS is soliciting comments concerning Form 14242, Reporting Abusive Tax...

  12. 76 FR 77592 - Proposed Collection; Comment Request for Form 14242

    Science.gov (United States)

    2011-12-13

    ...: Reporting Abusive Tax Promotions or Preparers. OMB Number: 1545-2219. Form Number: Form 14242. Abstract: The IC form is used to report an abusive tax avoidance scheme and tax return preparers who promote such...(c)(2)(A)). Currently, the IRS is soliciting comments concerning Form 14242, Reporting Abusive Tax...

  13. 78 FR 78515 - Proposed Collection; Comment Request for Form 14242

    Science.gov (United States)

    2013-12-26

    ... Abusive Tax Promotions or Preparers. OMB Number: 1545-2219. Form Number: Form 14242. Abstract: The IC form is used to report an abusive tax avoidance scheme and tax return preparers who promote such schemes...(c)(2)(A)). Currently, the IRS is soliciting comments concerning Form 14242, Reporting Abusive Tax...

  14. Private Rate of Return on Human Capital Investment in the Czech Republic: Differences by Study Fields

    Directory of Open Access Journals (Sweden)

    Savina Finardi

    2012-03-01

    Full Text Available The paper is focused on approaches to the measurement of the returns of private investments on human capital in the Czech Republic. In the last ten years, there is observed a significant increase in number ofstudents at Higher Education Institutions (HEIs and an increasing number of HEIs graduates is also expected in the Czech Republic in forthcoming years. Using data from the research project “REFLEX”, fromthe Czech Statistical Office and from EUROSTUDENT IV survey, the paper provides the methodology and the experimental computations of the rates of return on private investment in the tertiary education broken down by study fields.

  15. Estimation of the return period of rockfall blocks according to their size

    Science.gov (United States)

    De Biagi, Valerio; Lia Napoli, Maria; Barbero, Monica; Peila, Daniele

    2017-01-01

    With reference to the rockfall risk estimation and the planning of rockfall protection devices, one of the most critical and most discussed problems is the correct definition of the design block by taking into account its return period. In this paper, a methodology for the assessment of the design block linked with its return time is proposed and discussed, following a statistical approach. The procedure is based on the survey of the blocks that were already detached from the slope and had accumulated at the foot of the slope in addition to the available historical data.

  16. A supplement to an EOQ model with imperfect quality items, inspection errors, shortage backordering, and sales return

    Directory of Open Access Journals (Sweden)

    Jia-Tzer Hsu

    2014-04-01

    Full Text Available Hsu and Hsu (2013a established a closed-form solution for an EOQ model with imperfect quality items, inspection errors, shortage backordering, and sales returns, where the customers who return the defective items will receive full price refunds; i.e., the returned items are not replaced with good items. In this note, we extend Hsu and Hsu's (2013a work to consider the case that returned items are replaced with good items. A closed-form solution is developed for the optimal order size and the maximum shortage level. Numerical examples are provided to show the differences in the optimal solutions when returned items are replaced, and when they are not.

  17. Ethnic return migration: an Estonian case.

    Science.gov (United States)

    Kulu, H

    1998-01-01

    "This article examines return migration during the post World War 2 period of descendants of Estonians who emigrated to Russia at the end of the nineteenth and at the beginning of the twentieth century" The focus is on changing migration patterns over time. "The behavioural norm of Estonians born in the 1910s-1920s has been return migration to Estonia, while the migration behaviour of the 1930s-1940s and the 1950s-1960s generations can be characterized by urbanization in West Siberia. The results give reason to assume that ethnic return migration over a long period depends neither directly nor indirectly on momentary environmental changes, but rather on changes in people's values, habits, identity etc., which in the case of an ethnic minority living outside its historical homeland may be followed generation by generation." (EXCERPT)

  18. Expected Stock Returns and Variance Risk Premia

    DEFF Research Database (Denmark)

    Bollerslev, Tim; Tauchen, George; Zhou, Hao

    Motivated by the implications from a stylized self-contained general equilibrium model incorporating the effects of time-varying economic uncertainty, we show that the difference between implied and realized variation, or the variance risk premium, is able to explain a non-trivial fraction...... of the time series variation in post 1990 aggregate stock market returns, with high (low) premia predicting high (low) future returns. Our empirical results depend crucially on the use of "model-free," as opposed to Black- Scholes, options implied volatilities, along with accurate realized variation measures...... constructed from high-frequency intraday, as opposed to daily, data. The magnitude of the predictability is particularly strong at the intermediate quarterly return horizon, where it dominates that afforded by other popular predictor variables, like the P/E ratio, the default spread, and the consumption...

  19. Return Migration: A Study of College Graduates Returning to Rural U.S. Homes

    Science.gov (United States)

    Mahoney, Elizabeth D.

    2009-01-01

    The purpose of this study is to explore perceptions of return migration experiences and gain knowledge from rural residents who have left to obtain a college education and start careers in non-rural areas, and who then returned to their rural hometowns with the social and economic benefits of a college education, and other valuable resources. This…

  20. The return of risk : on the interrelations between risk, return and human decisions*

    NARCIS (Netherlands)

    Buijs, Arie

    2003-01-01

    For many years, optimism and euphoria reigned on the European and US stock markets. The major market indices consistently showed a substantial rate of return. Many new investors were attracted to the stock markets, initially earning wonderful returns on their portfolios. In the late nineties and t