Sex differences in distress from infidelity in early adulthood and in later life:A replication and meta-analysis of Shackelford et al. (2004)

Shackelford and colleagues (2004) found that men, compared to women, are more distressed by sexual than emotional infidelity, and this sex difference continued into older age. We conducted four high-powered replications (total N = 1,952) of this effect and found different results. A meta-analysis of original and replication studies finds the sex difference in younger samples (though with a smaller effect size), and no effect among older samples. Furthermore, we found attitude toward uncommitted sex to be a mediator (although not consistently in the same direction) between participant sex and relative distress between sexual and emotional infidelity. We hypothesize that the discrepancies between the original and replication studies may be due to changing cultural attitudes about sex across time. Confirming this speculative interpretation requires further investigation. Keywords: evolutionary psychology, human nature, sex differences, cultural differences, replicatio

Evaluatie plateaustal vleesvarkens = Evaluation two-level pen for finishing pigs

A two-level pen is an option to create more floor area for pigs. Fattening pigs used the second level as lying room. An optimal pen design is substantially for a good use of a second level

Applied Plasma Research

Contains research objectives, summary of research and reports on three research projects.National Science Foundation (Grant GK-28282X)M.I.T. Lincoln Laboratory Purchase Order No. CC-54

Applied Plasma Research

Contains research objectives and reports on three research projects.National Science Foundation (Grant GK-18185)Lincoln Laboratory Purchase Order No. CC-554U. S. Navy (Office of Naval Research) under Contract N00014-67-A-0204-0019Air Force Office of Scientific Researc

Plasmas and Controlled Nuclear Fusion

Contains research objectives, summary of research and reports on six research projects.U. S. Atomic Energy Commission (Contract AT(11-1)-3070

Applied Plasma Research

Contains research objectives and reports on three research projects.National Science Foundation (Grant GK-2581)Joint Services Electronics Program under Contract DA 28-043-AMC-02536(E

Hydraulic and biotic impacts on neutralisation of high-pH waters

The management of alkaline (pH 11–12.5) leachate is an important issue associated with the conditioning, afteruse or disposal of steel slags. Passive in-gassing of atmospheric CO₂ is a low cost option for reducing Ca(OH)₂ alkalinity, as Ca(OH)₂ is neutralised by carbonic acid to produce CaCO₃. The relative effectiveness of such treatment can be affected by both the system geometry (i.e. stepped cascades versus settlement ponds) and biological colonization. Sterilized mesocosm experiments run over periods of 20 days showed that, due to more water mixing and enhanced CO₂ dissolution at the weirs, the cascade systems (pH 11.2 → 9.6) are more effective than settlement ponds (pH 11.2 → 11.0) for lowering leachate alkalinity in all the tested conditions. The presence of an active microbial biofilm resulted in significantly more pH reduction in ponds (pH 11.2 → 9.5), but had a small impact on the cascade systems (pH 11.2 → 9.4). The pH variation in biofilm colonized systems shows a diurnal cycle of 1 to 1.5 pH units due to CO₂ uptake and release associated with respiration and photosynthesis. The results demonstrate that, where gradient permits, aeration via stepped cascades are the best option for neutralisation of steel slag leachates, and where feasible, the development of biofilm communities can also help reduce alkalinity

Plasmas and Controlled Nuclear Fusion

Contains research objectives and reports on six research projects.U. S. Atomic Energy Commission (Contract AT(30-1)-3980