Calculation of the expected lifetime lost due to an extra risk

Methods are given for estimating the average years of life lost when a person is discovered to be at risk from an extra hazard. The methods use the probability per year of the extra risk striking, and the mean and standard deviation of lifetime in the absence of the risk. The formulae are simple enough that only a hand‐held calculator is needed.     

Pre‐procreative ages in population stability and cyclicity

Age‐specific models of population renewal (with and without feedback) which imply convergence to a stable state for some levels of fertility or feedback may imply the presence of long‐term cycling around a constant or exponentially changing equilibrium for other levels of fertility or feedback. The switch from one regime to the other is a “bifurcation.”; The conditions for bifurcation involve the roots of an analogue of Lotka's Equation.

Typically bifurcation is induced by raising the strength of feedback or the level of fertility. It has been known since the early 1980s, however, that this is sometimes impossible. It is sometimes impossible even with the linear renewal equation itself and with the most basic of non‐linear models, Lee's cohort feedback model.

Here it is proved that this typical route to bifurcation does not fail for these basic models in the presence of a condition which always holds for realistic applications with higher organisms: the existence of a span of ages before the onset of fertility.

Specifically, a strictly positive lower bound on ages of procreation is proved to be sufficient to guarantee the existence of a rescaling of Lotka's Equation for which the real part of some complex root vanishes. This result holds for absolutely Lebesgue‐integrable (signed) net maternity functions on the positive real line and for absolutely summable (signed) net maternities on the positive integers.

It follows that Coale's rescaling device for the analysis of approach to stability in stable population theory can be implemented for all realistic human net maternity schedules. It also follows that the many special cases of the cohort feedback model throughout population biology will all generate persistent cycling instead of stability if feedback is sufficiently strong.     

Buffon's needle and the estimation of migration distances

A procedure is suggested for estimating migration distances from data on the proportion of migrants crossing regional boundaries. The method makes use of Buffon's needle, a problem in geometrical probability from the eighteenth century that was originally used as an empirical means of estimating π. The procedure is described for various scenarios that differ in their assumptions about region shape, the spatial distribution of population, and the distribution of migration distances. An application to migration distances in the United States is given, and additional attention is given to the estimation of intraregional migration distances.     

Sex and Gender Implications in Cases of Elder Abuse

This paper focuses on caregiving which has failed. Although little attention has been given to the role of sex and gender in elder abuse, an analysis of 77 cases of elder abuse seen in the Detroit area in 1981 revealed that both factors play a role in generating elder abuse, neglect, or exploitation, or in determining its form. Gender issues included: patterns of spouse abuse in old a e; gender differences in the types of abuse/neglect/exploitation wfich were perpetrated; gender concerns of the abuser which generate abuse; and sex or gender discrimination as a type of abuse of the elderly. Sexual factors observed included: parent-child incest; marital rape in old age; and problems of sexual malfunction which helped to generate the abuse. Suggestions for improved professional identification and management of elder abuse cases are made.     

Beliefs About Diet and Health:

Low income older women (N = 20) in South Carolina were recruited from congregate meal sites for qualitative interviews to assess beliefs about general health, physical functioning, and preventive health behaviors. A loosely structured interview guide of topics was used to encourage free expression of informants' ideas. The Ethnograph analysis package was used for data analysis. In response to open-ended questions, the women spontaneously shared their beliefs about diet and health. Implications for health promotion in rural areas are discussed.     

Being Transgender: The Experience of Transgender Identity Development

This article is based on a grounded theory analysis of interviews with transgender-identified people from different regions of the United States. Participants held a variety of gender identities under the transgender rubric (e.g., crossdresser, transman, transwoman, butch lesbian). Interviews explored the participants’ experiences in arriving at their gender identity. This article presents three clusters of findings related to the common processes of transgender identity development. This process was made possible by accessibility of transgender narratives that injected hope into what was a childhood replete with criticism and scrutiny. Ultimately, participants came to their identities through balancing a desire for authenticity with demands of necessity—meaning that they weighed their internal gender experience with considerations about their available resources, coping skills, and the consequences of gender transitions. The implications of these findings are considered in terms of their contribution to gender theory, research, and clinical support for transgender clients.     

A Social and Historical Perspective of the San Francisco Gay Men's Chorus

ABSTRACT

This study sought to understand the various roles music played for gay men who were members of the San Francisco Gay Men's Chorus, the world's first gay men's chorus. Specifically, it answers the following questions: What is the demographic profile of the chorus members? How has the chorus shaped or reflected social issues; how has the chorus shaped or reflected political issues; how has the music evolved over time?; How was the chorus impacted by the HIV/AIDS epidemic? Historical information for this study was gathered through eight interviews of original and long-time choral members as well as the current artistic director. Interviews were conducted in San Francisco at the San Francisco Gay Men's Chorus office, and additional data were derived from programs of previous choral concerts, two questionnaires (Internalized Homophobia Scale and Gay Chorus Questionnaire), and observations of choral rehearsals and concerts. As a follow-up to a previous study documenting the formation of the chorus in 1978–1982, this study historically documents the chorus's evolution from 1983 through 2003, emphasizing the chorus's impact on social and political issues, the musicality of the chorus, and the impact of HIV/AIDS on the chorus.     

Factors Associated With Emotional Satisfaction During First Anal Intercourse in a Sample of YMSM

ABSTRACT

We sought to determine, in a sample of 2,813 HIV seronegative young men who had sex with other men age 18–24, whether physical satisfaction would explain emotional satisfaction during first anal intercourse and whether emotional satisfaction would impact having sex with a partner a second time. Emotional satisfaction was explained mostly by physical satisfaction during the event, but partner type also had direct impact on emotional satisfaction. Our findings suggest that first anal intercourse experiences in young men are both emotionally and physically satisfying and may impact subsequent sexual behavior and partner decision-making.     

性观念:70后和80后的比较——基于CGSS2005数据的分析

当前中国社会有关70后和80后之间的各种争论层出不穷,主要集中在性观念等道德观的层面,例如,许多人认为80后在性观念上面比70后更为开放,但是缺乏严谨的数据论证。因此,本文使用CGSS(中国综合社会调查)2005年的数据对此进行了分析,发现70后、80后这种基于年龄的代际概念并没有统计上的意义,即在控制相关变量后,这两个年龄阶段群体的性观念开放程度并不存在显著的差异。