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Cardiovascular deconditioning after long duration spaceflight is especially challenging in women who have a lower orthostatic tolerance (OT) compared with men. We hypothesized that an exercise prescription, combining supine aerobic treadmill exercise in a lower body negative pressure (LBNP) chamber followed by 10 min of resting LBNP, three to four times a week, and flywheel resistive training every third day would maintain orthostatic tolerance (OT) in women during a 60-day head-down-tilt bed rest (HDBR). Sixteen women were assigned to two groups (exercise, control). Pre and post HDBR OT was assessed with a tilt/LBNP test until presyncope. OT time (mean ± SE) decreased from 17.5 ± 1.0 min to 9.1 ± 1.5 min (−50 ± 6%) in control group (P

Amid the mass slaughter and starvation of Palestinians in Gaza, it is easy to forget the political drama that gripped Israel only one year ago. After assuming power in December 2022, a new far-right government led by Benjamin Netanyahu had proposed a slate of judicial and administrative reforms that prompted a wave of anti-government protests. Concerned journalists, former U.S. and Israeli government officials, and major American Jewish organizations issued ominous warnings about democratic backsliding. Israel, it seemed, was heading in the direction of illiberal Hungary. [ABSTRACT FROM AUTHOR]

The recent critical turn toward post-secularism, particularly on behalf of theorists working from the perspective of Christian societies, has highlighted the difficulty of approaching the history of the Middle East through the binary of religion and secularism. This article argues that such terms are of little explanatory value in and of themselves, but rather must themselves be explained as unique historical objects. Through an analysis of the Arab public school system created by the government of Mandatory Palestine, this study demonstrates how the transformation of Islamic education occurred within a matrix of colonial domination that promoted its unique understanding of religion as a universal standard. By tracing the emergence of "religion" as a distinct category of knowledge and human experience in modern Palestine, this article draws attention to the factors that distinguish the development of colonial secularism from phenomena observed in the Euro-American context.

Presents demographic information about students taking two online courses at two institutions. Discusses changes in learning environments that accompany the move to the virtual classroom. Points out potential problems in delivering courses with new technologies. (RS)

In starfish, the addition of the hormone 1-methyladenine (1-MA) to immature oocytes (germinal vesicle, GV-stage) arrested at the prophase of the first meiotic division induces meiosis resumption (maturation), which makes the mature eggs able to respond to the sperm with a normal fertilization response. The optimal fertilizability achieved during the maturation process results from the exquisite structural reorganization of the actin cytoskeleton in the cortex and cytoplasm induced by the maturing hormone. In this report, we have investigated the influence of acidic and alkaline seawater on the structure of the cortical F-actin network of immature oocytes of the starfish (Astropecten aranciacus) and its dynamic changes upon insemination. The results have shown that the altered seawater pH strongly affected the sperm-induced Ca2+ response and the polyspermy rate. When immature starfish oocytes were stimulated with 1-MA in acidic or alkaline seawater, the maturation process displayed a strong dependency on pH in terms of the dynamic structural changes of the cortical F-actin. The resulting alteration of the actin cytoskeleton, in turn, affected the pattern of Ca2+ signals at fertilization and sperm penetration. [ABSTRACT FROM AUTHOR]

Acculturation has become a popular variable in research on health disparities among certain ethnic minorities, in the absence of serious reflection about its central concepts and assumptions. Key constructs such as what constitutes a culture, which traits pertain to the ethnic versus 'mainstream' culture, and what cultural adaptation entails have not been carefully defined. Using examples from a systematic review of recent articles, this paper critically reviews the development and application of the concept of acculturation in US health research on Hispanics. Multiple misconceptions and errors in the central assumptions underlying the concept of acculturation are examined, and it is concluded that acculturation as a variable in health research may be based more on ethnic stereotyping than on objective representations of cultural difference. Keywords: Acculturation; Research methods; Hispanic Americans; Ethnic groups; Health inequalities; Mexican-Americans