Endurance exercise and leg strength in older women

Quadriceps strength and mass peak in the third decade of life, plateau, and then decline from the fifth decade on. To examine the influence of chronic endurance training and age on lean mass and leg strength, women runners (n = 62, age 43-69 years) and sedentary participants (n = 33, age 43-66 years) were divided into 40-, 50-, and 60-year age groups. Absolute isokinetic concentric torque did not differ between runners and sedentary women (97.9 +/- 19.5 and 104.6 +/- 22.7 N . m, respectively, p = .18) but was different between age groups independent of exercise status (107.6 +/- 18.4, 97.1 +/- 19.9, and 90.1 +/- 21.4 N . m, for 40s, 50s, and 60s, respectively, p < .05). Lean body mass also differed by age group (p < .05) but did not change differently among runners and sedentary women. These findings suggest that chronic endurance training might not influence the loss of muscle mass and muscle strength that occur with aging.     

Decolonial Hip Hop: Indigenous Hip Hop and the disruption of settler colonialism

ABSTRACT

Contemporary Detroit has gone through many changes – or so it appears. From streets lined with vehicles made by Chrysler, Ford, and General Motors and driven by the nearly 2 million people who called the city home in 1950 to certain parts of the city looking like ghost towns; from a population that dwindled to 670,000 to the revival of downtown. Yet, what has been remarkably consistent is the invisibility of the Motor City’s Indigenous population. Indeed, Indigenous erasure, combined with rhetoric and policies that continue to marginalize and subjugate African Americans in Detroit, create a place rooted in multiple colonialisms. This essay examines how Detroit’s Indigenous Hip Hop artists resist settler colonialism through art, creativity, and culture as well as the practices of Detroit 2.0, a rhetoric and policy used by Detroit elites to reimagine it as a place of opportunity. By making visible the connections between blackness and indigeneity, as well as by linking the struggle of colonized peoples in Detroit to those in Palestine, Indigenous artists are not only asserting their humanity and challenging the longstanding idea of their erasure, but also constructing pathways for artists and activists to disrupt the effects of multiple colonialisms that continue to marginalize people of colour in urban areas. Detroit’s Indigenous Hip Hop artists make socially conscious music and also participate as activists in the city of Detroit. They serve as a window onto contemporary Indigenous identity, represent an exemplar of the urban Indigenous experience, and combine activism with art in a variety of ways.     

Metropolitan Structure and Neighborhood Attainment: Exploring Intermetropolitan Variation in Racial Residential Segregation

Using data from the 1981, 1991, and 2001 waves of the Panel Study of Income Dynamics and several decennial censuses, we examine how characteristics of metropolitan areas are associated with black and white households’ neighborhood racial composition. Results from hierarchical linear models show that about 20% to 40% of the variation in the percentage of households’ tract population that is non-Hispanic white or non-Hispanic black exists across metropolitan areas. Over time, white households’ exposure to non-Hispanic white neighbors has declined, and their exposure to non-Hispanic black neighbors has increased; the reverse trends are observed for blacks. These trends cannot be attributed to changes in the ecological structure of metropolitan areas. Blacks have fewer white neighbors in large metropolitan areas containing sizable minority populations, and blacks have more white neighbors in metropolitan areas with high government employment. Whites have more black neighbors in metropolitan areas with high levels of government employment and ample new housing; whites have fewer black neighbors in metropolitan areas with a high level of municipal fragmentation. The association between metropolitan-area percentage black and tract percentage black is weaker among whites than among blacks, suggesting that whites are especially motivated to self-segregate in metropolitan areas with large black populations.     

Seeking Closure: Competition in Complementary Markets*

When offering a product that has a complementary product in a different market, a firm must consider the interdependence between the complementary products as well as the competition within markets. If the firm participates in both markets, the balancing act becomes even more challenging. This article provides insights about strategies in this latter setting: when should the firm seek to keep its products closed to competing complementary products, and when would the firm be better off by accepting a common standard? To address these questions, we employ standard game theoretic analysis to a simple spatial model that captures aspects of both intermarket externalities and intramarket competition. We find that if a firm participates in both markets and chooses a closed standard, it achieves lower profits compared to an open standard, but gains greater market share. Surprisingly, we find that customers are better off when standards are kept closed.     

近四十年来韩国《史记》研究综述（1971—2010）

《史记》是中国史学中一部继往开来的不朽巨著,作者司马迁开创的以人物为中心的纪传体,在汉代以后一直是历代王朝正史所沿用的体制。司马迁修《史记》,不仅尊重历史事实,秉笔直书,而且还注意语言文字的锤炼,文句优美。他将叙事、抒情、说理的不同文体有机地综合起来,达到思想上、艺术上的高度统一,为后代文史创作提供了范例。《史记》不仅是中国纪传体史书的开创者,而且对后世的散文、小说、戏曲都产生了深远的影响。同时它也早已流传至国外,在汉文化圈国家中亦有不小的影响。其中,《史记》传入韩国,特别受到韩国知识界人士的关心和推崇,为韩国学术界所重视。到了1960年代中期,随着国家经济的发展,韩国整个社会的发展进入了一个历史的新时期,不仅国家面貌发生了根本性变化,学术文化事业也步入正轨,同时韩国学术界对中国学术文化的关心及研究也重新得到了高度重视。正是在这样的基础上,韩国学者对《史记》的翻译和研究有了较大的进展,在传播、普及和通俗化方面作出了积极的贡献。本文除简述《史记》在韩国的流传背景外,还分别论述自1971年至2010年近四十年来《史记》在当代韩国的翻译介绍与研究现状,并对其研究成果上存在的一些不足和空缺作一番客观的评价。     

AIDS and the new sexual order

THE ETERNAL GARDEN: SEASONS OF OUR SEXUALITY. Sally Wend‐kos Olds. New York: Times Books, 1985; 325 pages; $17.95.

WORKING WOMEN: THE SUBTERRANEAN WORLD OF STREET PROSTITUTION. Arlene Carmen and Howard Moody. New York: Bessie/Harper &; Row, 1985; 208 pages; $16.50.     

Inter- and transdisciplinary approaches to population–environment research for sustainability aims: a review and appraisal

The causes and consequences of demographic changes for the environment, and the possible ways of influencing population dynamics to achieve ‘sustainability’, have been the subject of many debates in science and policy in recent decades. However, the body of knowledge concerning relationships between population dynamics and sustainability is quite fragmented, dispersed over many disciplines, and encompasses diverse theories, paradigms and methodologies. This paper reviews four selected frameworks: linear, multiplicative, mediated, and system-theoretical approaches and perspectives. We represent how population–environment relationships are conceptualized, provide examples of research questions and accepted approaches, and critically assess their utility for different sorts of research for sustainable development. We note the growing recognition of the value of embracing complexity in population–environment research, and how this is consistent with normative aims of development.     

Lessons Learned From the Supporting Father Involvement Study: A Cross-Cultural Preventive Intervention for Low-Income Families With Young Children

ABSTRACT

Despite the proliferation of fatherhood programs designed to promote paternal involvement and positive family outcomes, evaluations of these programs are scarce. The Supporting Father Involvement (SFI) study is a randomized clinical trial comprised of 289 low-income Spanish- and English-speaking families living in California. The evaluation design reflects a partnership stance that promotes empowerment of staff and social service agencies. This article examines lessons learned from the program's first 3 years (2002–2004) from the perspectives of both evaluators and program staff. The lessons cover a broad range of areas, including communication procedures, training, staffing, recruitment/retention, clinical needs, intervention content and process, and maintaining cultural sensitivity.     

Gender Minority Stress: A Critical Review

ABSTRACT

Past studies that compare cisgender to transgender (or trans) and gender diverse people have found a higher prevalence of mental health problems among the latter groups. This article uses Testa’s gender minority stress framework, which is an expansion of minority stress theory, to assess minority stressors that are specific to the experiences of trans and gender diverse people. The concept of cisnormativity, an ideology that positions cisgender identities as a norm, is used in relation to the gender minority stress framework to describe the marginalizing nature of social environments for trans and gender diverse people. This article provides a critical review that integrates and expands on past theoretical perspectives on gender minority stressors and protective factors. Specifically, this article demonstrates the relevance of cultural and ethnic backgrounds to complement the application of intersectionality in research on health disparities experienced by trans and gender diverse people.