First-year Results of Broadband Spectroscopy of the Brightest Fermi-GBM Gamma-Ray Bursts

We present here our results of the temporal and spectral analysis of a sample of 52 bright and hard gamma-ray bursts (GRBs) observed with the Fermi Gamma-ray Burst Monitor (GBM) during its first year of operation (July 2008-July 2009). Our sample was selected from a total of 253 GBM GRBs based on each event peak count rate measured between 0.2 and 40MeV. The final sample comprised 34 long and 18 short GRBs. These numbers show that the GBM sample contains a much larger fraction of short GRBs, than the CGRO/BATSE data set, which we explain as the result of our (different) selection criteria and the improved GBM trigger algorithms, which favor collection of short, bright GRBs over BATSE. A first by-product of our selection methodology is the determination of a detection threshold from the GBM data alone, above which GRBs most likely will be detected in the MeV/GeV range with the Large Area Telescope (LAT) onboard Fermi. This predictor will be very useful for future multiwavelength GRB follow ups with ground and space based observatories. Further we have estimated the burst durations up to 10MeV and for the first time expanded the duration-energy relationship in the GRB light curves to high energies. We confirm that GRB durations decline with energy as a power law with index approximately -0.4, as was found earlier with the BATSE data and we also notice evidence of a possible cutoff or break at higher energies. Finally, we performed time-integrated spectral analysis of all 52 bursts and compared their spectral parameters with those obtained with the larger data sample of the BATSE data. We find that the two parameter data sets are similar and confirm that short GRBs are in general harder than longer ones.Comment: 40 pages, 11 figures, 3 tables, Submitted to Ap

U.S. Billion-ton Update: Biomass Supply for a Bioenergy and Bioproducts Industry

The Report, Biomass as Feedstock for a Bioenergy and Bioproducts Industry: The Technical Feasibility of a Billion-Ton Annual Supply (generally referred to as the Billion-Ton Study or 2005 BTS), was an estimate of “potential” biomass within the contiguous United States based on numerous assumptions about current and future inventory and production capacity, availability, and technology. In the 2005 BTS, a strategic analysis was undertaken to determine if U.S. agriculture and forest resources have the capability to potentially produce at least one billion dry tons of biomass annually, in a sustainable manner—enough to displace approximately 30% of the country’s present petroleum consumption. To ensure reasonable confidence in the study results, an effort was made to use relatively conservative assumptions. However, for both agriculture and forestry, the resource potential was not restricted by price. That is, all identified biomass was potentially available, even though some potential feedstock would more than likely be too expensive to actually be economically available. In addition to updating the 2005 study, this report attempts to address a number of its shortcoming

Electromagnetic Wave Theory and Applications

Contains table of contents for Section 3 and reports on four research projects.California Institute of Technology/Jet Propulsion Laboratory Agreement 959548National Aeronautics and Space Administration Grant NAGW-1617National Aeronautics and Space Administration Agreement 958461U.S. Navy - Office of Naval Research Grant N00014-89-J-1107U.S. Navy - Office of Naval Research Grant N00014-92-J-1616U.S. Navy - Office of Naval Research Grant N00014-92-J-4098Digital Equipment CorporationJoint Services Electronics Program Contract DAAL03-92-C-0001U.S. Navy - Office of Naval Research Agreement N00014-90-J-1002U.S. Navy - Office of Naval Research Agreement N00014-89-J-1019DEMACOU.S. Army Cold Regions Research and Engineering Laboratory Contract DACA89-93-K-0009U.S. Department of Transportation Agreement DTRS-57-92-C-00054TTD1Advanced Research Projects Agency/Consortium for Superconducting Electronics Contract MDA972-90-C-0021National Science Foundation Fellowship MIP 88-58764National Science Foundatio

Averting HIV and AIDS epidemic in Nicaragua : Studies of prevalence, knowledge, attitudes, and behavior

The overall aim of this thesis was to obtain an understanding of the dynamics of the HIV epidemic by estimating prevalence and exploring the relationship between HIV-related knowledge, attitudes, behavior, and HIV status in Nicaragua. Structured questionnaires were administered to adults from a health and demographic surveillance system in León, Nicaragua (Papers I–III). In-depth interviews and a survey were conducted among men who have sex with men (MSM, Paper IV). Blood sampling for HIV was carried out among 2,204 men and women (Paper I). Bivariate and multivariate analyses, including adjusted prevalence ratio (Papers I, II, IV), factor analysis, Cronbach’s alpha, and hierarchical regression analysis (Paper III) were performed. Thematic analysis was used with qualitative data (Paper IV). The prevalence of HIV in the general population was 0.35% (95% CI, 0.17–0.73). Those who have taken a HIV test were more likely to be females, younger, living in an urban setting, have a higher level of education, be married or cohabiting, and have no religious affiliation. HIV-related knowledge was lower among members of the general population than among MSM. Unprotected sex was reported more times with regular partners than with casual partners. Findings suggested that consistency of condom use and emotional attachment (steady relations) were inversely related. Stigma and discrimination were reported high in the general population; they appeared to be negatively associated with HIV-related knowledge, self-perception of HIV risk, HIV testing, and willingness to disclose HIV status in the event of being HIV-positive. Findings demonstrated an increasing tolerance towards same-sex attractions. MSM have a better understanding of HIV transmission than men and women of the general population. Although seven out of ten MSM and six out of ten women were concerned about becoming infected with HIV, inconsistent condom use was common. This study confirmed that Nicaragua has a low prevalence but high risk for HIV infection and transmission. Results underscore that social, behavioral, and cultural factors contribute to retard progress in achieving the Millennium Development Goals on reducing gender inequality and combating HIV/AIDS. Addressing these challenges depends not only on successful behavior change interventions, but requires a culturally gender-appropriate strategy

Intervening factors in health care professionals’ attitudes and behaviours towards comprehensive abortion care in the workplace : a comparative case study of Tanzania and Ethiopia

Purpose: Health care professionals’ attitudes and behaviours play a fundamental role in the provisionof timely comprehensive abortion care as a maternal health intervention and save hundredsof thousands of women’s lives, annually. This study explores underlying factors influencingTanzanian and Ethiopian health care professionals’ attitudes and behaviours towards comprehensiveabortion care between 2015 and 2020.Materials and methods: The study inductively explored Ethiopian and Tanzanian health care professionals’behaviours using a comparative case study design and a textual analytical approach.Published and unpublished literature, documents and newspapers were used as data sources. Thetwo cases were selected because of their different approaches towards the governance of abortioncare, one gradually legalising while the other persistently restricting.Results: Results demonstrated that there are both subjective (beliefs, attitudes, images, pre-dispositions)and objective (institutional incapacity) factors that impact the actions of health care professionalsin the work environment.Conclusions: The study concluded that the intervention of subjective factors results from the institutionalfailure to effectively bridge the divide between governance and accessibility of safe abortioncare

Pathways to change: Three decades of feminist research and activism to end violence against women in Nicaragua

This paper presents the results of nearly three decades of partnershipbetween feminist researchers and activists to prevent violence againstwomen and girls (VAWG) in Nicaragua. A household survey conductedin 1995 in León, the country’s second-largest city, revealed that 55 percent of women had experienced lifetime physical intimate partnerviolence (IPV), and 27 per cent had experienced IPV in the last 12months. The study results were instrumental in changing domesticviolence laws in Nicaragua. A follow-up study in 2016 found a decreaseof 63 per cent in lifetime physical IPV and 70 per cent in 12-monthphysical IPV. This paper examines possible explanations for thereduction, including the policy reforms resulting from feministadvocacy. We compare risk and protective factors for physical IPV, suchas changes in women’s attitudes towards violence, their use of services,and knowledge of laws, using data from both the 1995 and 2016surveys, as well as three waves of Demographic and Health Surveys. Weconclude that the decline in IPV can be partially attributed to the effortsof the Nicaraguan women’s movements to reform laws, provide servicesfor survivors, transform gender norms, and increase women’sknowledge of their human rights

Knowledge about Sexual and Reproductive Health among School Enrolled Adolescents in Tololar, Nicaragua, A Cross-Sectional Study

Background: Nicaragua has the highest prevalence of teenage pregnancies in Latin America. Knowledge regarding sexual and reproductive health plays an integral part in sexual behavior. The objective was to assess school going adolescents' knowledge about sexual and reproductive health and possible factors affecting it in the semi-rural community of Tololar, Nicaragua. Methods: A cross-sectional study with a self-administered questionnaire on tablets was used for data collection. All 253 registered students at the school present at the time of fieldwork who gave written informed consent were deemed eligible for the study. A total of 225 participants in the ages of 11-19 years were included. Simple linear regression and multiple linear regression were performed analyzing the outcome knowledge. A p-value &lt;0.05 was considered significant. Results: The general knowledge about sexual and reproductive health was moderate; however, knowledge gaps were found such as prevailing myths and poor knowledge regarding human immunodeficiency virus (hiv) transmission and contraceptive methods. Being female and single were significant negative determinants of knowledge (p-value &lt; 0.01) and knowledge increased significantly with age (p-value &lt; 0.05). School teachers, websites, social networks, and TV were the most frequently chosen sources of information on the topic. Conclusions: Increased education on sexual and reproductive health with new interventions particularly for young females is recommended. Using IT-based materials as a complement may be an effective way to reach out to adolescents.MZ id : JPHI-18-2464</p

Men's reproductive coercion of women : prevalence, experiences, and coping strategies-a mixed method study in urban health facilities in León, Nicaragua

BACKGROUND: Reproductive coercion (RC) is a common form of violence against women. It can take several expressions aiming at limiting women's reproductive autonomy. Thus, the frequency and how reproductive coercion can be resisted must be investigated. There is limited research regarding RC in Latin America. Therefore, this study aimed to measure RC prevalence and associated factors and to explore the women experiences and coping strategies for RC. METHODS: A convergent mixed-methods study with parallel sampling was conducted in Nicaragua. A quantitative phase was applied with 390 women 18-35 years old attending three main urban primary health care facilities. Lifetime and 12 months of exposure to RC behaviors including pregnancy promotion (PP) and contraceptive sabotage (CS) were assessed. Poisson regression with a robust variance estimator was used to obtain adjusted prevalence rate ratios and 95% Confidence Intervals (CIs). In addition, seven in-depth interviews were collected and analyzed using qualitative content analysis. RESULTS: Ever RC prevalence was 17.4% (95% CI, 13.8-21.6) with similar proportions reporting ever experiencing PP (12.6%, 95% CI 9.4-16.3) or ever experiencing CS (11.8%, 95% CI 8.7-15.4). The prevalence of last twelve months RC was slightly lower (12.3%, 95% CI, 9.2-16.0) than above. Twelve months PP (7.4%, 95% CI 5.0-10.5) and CS (8.7%, 95% CI 6.1-12.0) were also similar. Women's higher education was a protective factor against ever and 12 months of exposure to any RC behaviors by a current or former partner. Informants described a broad spectrum of coping strategies during and after exposure to RC. However, these rarely succeeded in preventing unintended pregnancies or regaining women's long-term fertility autonomy. CONCLUSIONS: Our facility-based study showed that men's RC is a continuous phenomenon that can be enacted through explicit or subtle behaviors. Women in our study used different strategies to cope with RC but rarely succeeded in preventing unintended pregnancies or regaining their long-term fertility autonomy. Population-based studies are needed assess this phenomenon in a larger sample. The Nicaraguan health system should screen for RC and develop policies to protect women's reproductive autonomy

Knowledge about Sexual and Reproductive Health among School Enrolled Adolescents in Tololar, Nicaragua, A Cross-Sectional Study

Background: Nicaragua has the highest prevalence of teenage pregnancies in Latin America. Knowledge regarding sexual and reproductive health plays an integral part in sexual behavior. The objective was to assess school going adolescents' knowledge about sexual and reproductive health and possible factors affecting it in the semi-rural community of Tololar, Nicaragua. Methods: A cross-sectional study with a self-administered questionnaire on tablets was used for data collection. All 253 registered students at the school present at the time of fieldwork who gave written informed consent were deemed eligible for the study. A total of 225 participants in the ages of 11-19 years were included. Simple linear regression and multiple linear regression were performed analyzing the outcome knowledge. A p-value &lt;0.05 was considered significant. Results: The general knowledge about sexual and reproductive health was moderate; however, knowledge gaps were found such as prevailing myths and poor knowledge regarding human immunodeficiency virus (hiv) transmission and contraceptive methods. Being female and single were significant negative determinants of knowledge (p-value &lt; 0.01) and knowledge increased significantly with age (p-value &lt; 0.05). School teachers, websites, social networks, and TV were the most frequently chosen sources of information on the topic. Conclusions: Increased education on sexual and reproductive health with new interventions particularly for young females is recommended. Using IT-based materials as a complement may be an effective way to reach out to adolescents.<p>MZ id : JPHI-18-2464</p