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Search Results: 1 - 10 of 228 matches for " Amarjit Tamang "
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First-Order Light Deflection by Einstein-Strauss Vacuole Method
Debasish Saha,Amarjit Tamang,Ramil Izmailov,Carlo Cattani,Kamal K. Nandi
Journal of Gravity , 2013, DOI: 10.1155/2013/686950
Abstract: We resolve here an outstanding problem plaguing conformal gravity in its role in making consistent astrophysical predictions. Though its static spherically symmetric solution incorporates all the successes of Schwarzschild gravity, the fit to observed galactic rotation curves requires , while the observed increase in the Schwarzschild light deflection by galaxies appears to demand . Here we show that, contrary to common knowledge, there is an increase in the Schwarzschild deflection angle in the vicinity of galaxies due purely to the effect of , when the idea of the Einstein-Strauss vacuole model is employed. With the inconsistency now out of the way, conformal gravity should be regarded as a good theory explaining light deflection by galaxies. 1. Introduction The metric exterior to a static spherically symmetric distribution in Weyl conformal gravity has been obtained by Mannheim and Kazanas [1]. Recently, the solution has been used to fit rotation curves of many galaxy samples [2] as well as to predict the maximal size of galaxies [3]. The metric, which we call Mannheim-Kazanas-de Sitter (MKdS) metric, reads ( ) where is the central mass and and are arbitrary constants that could be appropriately fixed by using the fit to rotation curves. For distances neither too small nor too large, the above mentioned metric is a good approximation. Now, there could be three possible ways to calculate light deflection in the above spacetime. First, the conventional calculations for light deflection show that the constant does not appear in the relevant equations, leading finally to the two way deflection as [4] where is the distance of closest approach. The difficulty is that the fit to observed rotation curve requires , and for consistency all other astrophysical observations should respect this sign. Now, the observed light deflection by a galaxy is always more than the Schwarzschild value , and hence to avoid the negative contribution in (3), one must demand [4]. Thus there appears an inconsistency from the usual method. The second option is to use the Rindler-Ishak method [5], which is based on the realization that conventional methods do not apply to asymptotically nonflat spacetimes as the limit makes no sense in it. Their original method of invariant angle is most appropriate in such situations, but it has an as yet unnoticed difficulty on the galactic scales, as explained below. Ishak et al. [6] thereafter improved the calculations using the Einstein-Strauss vacuole model and this provides us with the third and best option in our opinion. The purpose of
Negotiating Chinese Identity in the Internet Age
Ritendra Tamang
Asian Social Science , 2009, DOI: 10.5539/ass.v4n11p8
Abstract: The advent of the internet has led to the globalization of cultural images of Chinese identity. Online Chinese immigrants’ associations, in conjunction with Chinese-language electronic media, offer various and often competing images of Chinese ethnic and cultural identities. The multiple representations of Chinese identity in the various media formats provide options for individuals to negotiate their identity and belonging in different contexts. This paper examines the roles that the internet plays in influencing ethnic identity among Chinese immigrants in the province of British Columbia, Canada. I argue that the array of images offered by online Chinese-language media websites and virtual communities create more options for individual Chinese immigrants to negotiate and redefine their ethnic and cultural identities in relation to other Chinese and non-Chinese immigrant groups.
Internally Displaced Persons in Nepal: Neglected and Vulnerable
Ritendra Tamang
Asian Social Science , 2009, DOI: 10.5539/ass.v5n6p3
Abstract: This article examines Nepal’s policies regarding internally displaced persons (IDPs), and aid efforts by international aid agencies and donors. Ten years of conflict (1996-2006) between the Nepal government and the Maoists was a main cause of the displacement of many people. Although the international community acknowledged that the armed conflict between Maoist forces and Nepal security forces contributed significantly to the displacement, the crisis did not receive enough international attention until recently. Ongoing violence in some districts of Nepal continues to pose major challenges to many returnees and to the peace process. The contradictions and tensions existing within Nepal’s IDP policies create further strains, especially on individuals and families displaced by Nepal security forces. Researchers, policy makers, and international agencies need to be aware of the geopolitical factors that could endanger the effectiveness of aid distribution to displaced Nepalese.
Afghan Forced Migration: Reaffirmation, Redefinition, and the Politics of Aid
Ritendra Tamang
Asian Social Science , 2009, DOI: 10.5539/ass.v5n1p3
Abstract: This paper examines important issues concerning forced migration of Afghan refugees and how these issues are related to the politics of aid, gender, place, identity, power, and inequality. The paper argues that the experience of forced migration in conjunction with the challenges encountered by Afghan refugees in Pakistan refugee camps aid in reproducing social structures and shaping gender relations. In the process, many Afghan refugees are able to reaffirm self and group identity and belonging from multiple locations. The paper concludes with an analysis of the prospects and challenges of returning to Afghanistan.
Geopolitics and Shifts in Development Aid Policies: The Effects on Poverty in Nepal
Ritendra Tamang
Journal of Sustainable Development , 2009, DOI: 10.5539/jsd.v2n2p44
Abstract: Current debates on global poverty reduction have renewed scholarly interest in foreign aid. As a result of recent concerns over global security, donors and aid agencies have redirected aid funding to countries of strategic political interest. To comply with the political agendas of the North, major aid donors (such as USAID, CIDA, and the EU) have shifted their priorities from humanitarianism and sustainable development to freedom and international security. Such shifts undermine interventions critical to easing widening socioeconomic disparities, and poor countries like Nepal have experienced a significant decline in international development aid. This paper explores the implications of current aid policy on the division between Northern and Southern countries. The use of a multidisciplinary approach in the analysis of development aid policies is beneficial for understanding the complexities and tensions involved in the provision and distribution of development aid.
Premarital Sexual Behavior among male college students of Kathmandu, Nepal
Ramesh Adhikari, Jyotsna Tamang
BMC Public Health , 2009, DOI: 10.1186/1471-2458-9-241
Abstract: A cross-sectional survey of college students was conducted in April-May 2006. A self-administered questionnaire was completed by 573 male students. Association between premarital sex and the explanatory variables was assessed in bivariate analysis using Chi-square tests. The associations were further explored using multivariate logistic analysis.Despite the religious and cultural restrictions, about two-fifths of survey respondents (39%) reported that they have had premarital sex. The study has also shown that substantial proportions of students indulge in sexual activities as well as risky sexual behavior. Sex with commercial sex workers, multiple sex partners, and inconsistence use of condom with non-regular partner was common among the students. Less than two in five male students (57%) had used condom at the first sexual intercourse.The prevalence of premarital sex varied on different settings. Older students aged 20 and above were more likely to have premarital sex compared with younger students aged 15–19. Men who had liberal attitude towards male virginity at marriage were almost two times more likely to have engaged in premarital sex compared to their counterparts who have conservative attitude towards male virginity at marriage. Moreover, those students who believe in Hindu religion were more than two times (OR = 2.5) more likely to have premarital sex compared with those who follow other religions. Furthermore, those men who have close unmarried friends who have experienced premarital sexual intercourse were eight times (OR = 8.4) more likely to be sexually active compared to those who did not have such sexually active friends.Prevalence of premarital sexual intercourse and risky sexual behavior are not uncommon in Nepal. Young people are exposed to health hazards due to their sexual behavior; hence sex education should be provided. School or college based sexuality education could benefit even out-of-school youths, because their partners often are student
Sexual coercion of married women in Nepal
Ramesh Adhikari, Jyotsna Tamang
BMC Women's Health , 2010, DOI: 10.1186/1472-6874-10-31
Abstract: The data used in this paper comes from a cross-sectional survey on "Domestic Violence in Nepal" carried out in 2009. A total of 1,536 married women were interviewed and associations between sexual coercion and the explanatory variables were assessed via bivariate analysis using Chi-square tests. Logistic regression was then applied to assess the net effect of several independent variables on sexual coercion.Overall, about three in five women (58%) had experienced some form of sexual coercion by their husbands. Logistic regression analysis found that the literacy status of women, decision-making power regarding their own health care, husband-wife age differences, alcohol consumption by the husband, and male patriarchal control all had significant associations with women's experience of sexual coercion. Literate women had 28% less chance (adjusted odds ratio (aOR) = 0.72) of experiencing sexual coercion by their husbands than did illiterate women. Women who made decisions jointly with their husbands with regard to their own health care were 36% less likely (aOR = 0.64) to experience sexual coercion than those whose health care was decided upon by their mothers/fathers-in-law. On the other hand, women whose husbands were 5 or more years older than they were more likely to report sexual coercion (aOR = 1.33) than were their counterparts, as were women whose husbands consumed alcohol (aOR = 1.27). Furthermore, women who experienced higher levels of patriarchal control from their husbands were also more likely to experience sexual coercion by their husbands (aOR = 7.2) compared to those who did not face such control.The study indicates that sexual coercion among married women is widespread in Nepal. Programs should focus on education and women's empowerment to reduce sexual coercion and protect women's health and rights. Furthermore, campaigns against alcohol abuse and awareness programs targeting husbands should also focus attention on the issue of sexual coercion.Sexual
Genomic view on the peopling of India
Tamang Rakesh,Thangaraj Kumarasamy
Investigative Genetics , 2012, DOI: 10.1186/2041-2223-3-20
Abstract: India is known for its vast human diversity, consisting of more than four and a half thousand anthropologically well-defined populations. Each population differs in terms of language, culture, physical features and, most importantly, genetic architecture. The size of populations varies from a few hundred to millions. Based on the social structure, Indians are classified into various caste, tribe and religious groups. These social classifications are very rigid and have remained undisturbed by emerging urbanisation and cultural changes. The variable social customs, strict endogamy marriage practices, long-term isolation and evolutionary forces have added immensely to the diversification of the Indian populations. These factors have also led to these populations acquiring a set of Indian-specific genetic variations responsible for various diseases in India. Interestingly, most of these variations are absent outside the Indian subcontinent. Thus, this review is focused on the peopling of India, the caste system, marriage practice and the resulting health and forensic implications.
A common insertion of thoracoepicondylaris and an axillary arch of Langer: a case report
Lama P,Tamang BK
International Journal of Anatomical Variations , 2010,
Abstract: Variant muscle slips arising from the pectoralis major or the latissimus dorsi muscle have been described before. Here in these report, we present a rare case of aberrant muscular slip originating from the pectoralis major called as the “thoracoepicondylaris” and an unusual slip from the latissimus dorsi called as “axillary arch of Langer” to have a common insertion after arching superficial to the axillary neurovascular bundle into the fascia covering the biceps brachii. Clinical consideration of such a variation is discussed since the knowledge of the muscle is important for differential diagnosis.
Cattle Management Systems in Humid Subtropical Areas of Western Bhutan
NB Tamang and JM Perkins
Journal of Bhutan Studies , 2005,
Abstract:
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