Factors of Cognitive Complaints in Adults With HIV: A Structural Equation Model Analysis

The objective of this study was to use structural equation modeling (SEM) to examine the relationships between factors of cognitive complaints in 427 adults with HIV receiving care from an AIDS service organization (ASO) in Alabama. A face-to-face interview assessed cognitive complaints, mood, self-perceived health status, and substance use. Direct and indirect paths were specified between years with HIV (chronicity) age, education, stress, self-perceived health status, substance use, and cognitive complaints. The final model fit the data well (GFI = .95; AGFI = .92), revealing that age, education, substance use, self-perceived health status, and stress contributed directly or indirectly to cognitive complaints. Chronicity was only related to age, suggesting that duration of HIV may be of limited value in predicting cognitive complaints. These results demonstrate the complexity between the factors that influence cognitive complaints and offer possible solutions that health professionals can use to mitigate cognitive complaints in this population.     

Toward an understanding of aging in plutonium from direct measurements of stored energy

ABSTRACT

We present here the first direct measurement of the radiation-damage-induced energy stored in δ-phase plutonium. The primary mode of radioactive decay of ²³⁹Pu occurs with a time constant of τ=1.1?×?10¹²?s. Each decay imparts about 85?keV of recoil energy to the uranium byproduct, 5.2?Mev to the alpha particle, and a spectrum of mostly low energy gamma rays with the most probable at 51?keV [1]. Most of the decay energy is converted immediately to heat, releasing about 1.9?mW/g. However, some thermally-recoverable energy remains trapped. Reported here are measurements of that stored energy using differential scanning calorimetry (DSC) applied to ²³⁹Pu-2.0 at.%Ga δ-phase alloy. Retained energy of ～2 J/g saturates at about 5 months and is unchanged after 30 years. The magnitude of the stored energy agrees with a short-bond defect model that that we present here. This model treats radiation damage as a Pu impurity with shortened bond lengths. It explains the change in known properties with age and predicts that density increases with age, contrary to current thinking. The short-bond impurities proposed are expected to act like other impurities, affecting strength, phase transitions, grain boundaries and other metallurgical properties.     

Formation of plate-shaped Guinier–Preston zones during natural aging of an Al–Zn–Mg–Cu–Zr Alloy

Plate-shaped Guinier–Preston (G–P) zone formation in an Al–Zn–Mg–Cu–Zr alloy has been studied using transmission electron microscopy. The results provide, for the first time, direct evidence showing nucleation and growth of plate-shaped coherent G–P zones during natural aging.     

Effect of Mg content on Portevin–Le Chatelier band strain in Al–Mg sheet alloys

Experimental measurements of stress drops and band strains in type-B Portevin–Le Chatelier (PLC) bands were carried out for 5xxx series Al–Mg sheets with Mg content between 1.8 and 4.5?wt%. While the stress drops increase with global strain, the band strain values in all the samples follow a common linear relationship with global strain. The results indicate that the type-B PLC band strain is independent of solute content at given strain rate.     

Myelin breakdown mediates age-related slowing in cognitive processing speed in healthy elderly men

Background

To assess the hypothesis that in a sample of very healthy elderly men selected to minimize risk for Alzheimer’s disease (AD) and cerebrovascular disease, myelin breakdown in late-myelinating regions mediates age-related slowing in cognitive processing speed (CPS).

Materials and methods

The prefrontal lobe white matter and the genu of the corpus callosum myelinate later in brain development (late-myelinating white matter; LMWM) and are more vulnerable to breakdown due to the effects of normal aging. An in vivo MRI biomarker of myelin integrity (transverse relaxation rates; R₂) of LMWM was obtained for 38 very healthy elderly adult men (mean age = 66.3 years; SD = 6.0; range = 55–76). To evaluate regional specificity, we also assessed a contrasting early-myelinating region (splenium of the corpus callosum; SWM), which primarily contains axons involved in visual processing. CPS was assessed using the Trail Making Test.

Results

LMWM R₂ and CPS measures were significantly correlated (r = .515, p = .0009), but no significant association between R₂ and CPS was detected in the splenium (p = .409). LMWM R₂, but not SWM R₂, was a significant mediator of the relationship between age and CPS (p = .037).

Conclusions

In this very healthy elderly sample, age-related slowing in CPS is mediated by myelin breakdown in highly vulnerable late-myelinating regions but not in the splenium.     

The Older Woman as Sage: The Satisfaction of Mentoring

Mentoring is important to the personal and professional lives of many developing professionals, but it is also beneficial in numerous ways to the mentor. This article focuses on the benefits of mentoring from the mentor's prospective, including satisfaction in seeing protégées succeed and empowerment of both the mentor and protégée. This article showcases the importance of being a mentor, the impact mentoring has on developing psychologists, and how mentoring sustains older women's connections and contributions to their field. The authors discuss what mentoring is, what mentors do, how to become a mentor, and the benefits of being a mentor. How one becomes a mentor in various work settings including academia is also discussed, as are concerns regarding inappropriate mentoring relationships and how to improve the quality of the mentoring relationship. The authors suggest that becoming a mentor can be empowering for women clients as well as therapists.     

Aging,Agency, and Activism: Older Women as Social Change Agents

Current cohorts of older women are potential social activists, and their potential to contribute to social change is examined. It is argued that engagement in social action is positive and empowering for aging women. Older women both contribute to and benefit from social capital, connections among individuals in social networks, and norms of reciprocity (Putnam, 2000 Putnam , R. ( 2000 ). Bowling alone: The collapse and revival of American community . New York : Simon & Schuster .[Crossref] , [Google Scholar]). Recommendations are offered for organizations that wish to recruit and engage older women as members. A feminist therapy perspective is consistent with the empowerment of older women as social agents.     

Who Is Afraid of Death? Religiousness,Spirituality, and Death Anxiety in Late Adulthood

SUMMARY

Data from a sample of predominantly white, Christian men and women born in Northern California in the 1920s (N = 155) were used to test the hypothesis that traditional, church-centered religiousness and de-institutionalized spiritual seeking exemplify distinct, but equally adaptive, ways of approaching fear of death in old age. Although both religiousness and spirituality were related to positive psychosocial functioning (an integrated identity and involvement in everyday activities), only religiousness served as a buffer against the fear of death. This effect was consistent with the greater emphasis on conventionality and acceptance of social norms that characterized individuals high in religiousness. The absence of a relation between spirituality and fear of death reflected the spiritual individual's emphasis on personal searching, creativity, and the positive use of reminiscence. The implications of the findings for the management of death anxiety in old age are discussed.     

Euthanasia,Senicide, and the Aging Society

ABSTRACT

The elderly, particularly the severely demented, are at the cutting edge of the debate over active euthanasia. Such debilitated persons fall below the standards of “personhood” as these have been defined by various moral philosophers. With the pressures of economic hard times, one might predict that the most impaired aged would be candidates for “direct termination.” However, this essay defends the thesis that the prohibition against mercy killing must be upheld despite such pressures. It draws on the wisdom of both Hippocrates and Abraham.     

The Continuity Perspective of Aging and Retirement Applied to Protestant Clergy: An Analysis of Theory

ABSTRACT

This paper has examined some of the conceptual and operational issues of the continuity perspective, which is considered as more appropriate than others reviewed for the study of clergy retirement. As a solution to the dilemma of the inevitable changes associated with old age and the notion of continuity, the use of the sociological concept of “career” was suggested. With this concept as a guide, four components – situational/environmental factors, activity, psychological continuity, and occupational subculture – of a continuity perspective have been outlined.