Differential patterns of wife abuse: A data-based typology.

Despite the growing awareness of wife abuse as a serious social problem of epidemic proportions, to date no systematic research has been conducted to delineate on an empirical basis distinct patterns of abuse within this heterogeneous population. The present study has as its goal the identification of differential patterns of wife abuse, each having a unique etiological profile with attendant implications for intervention. Toward this end a multivariate quantitative taxonomic procedure was employed to delineate 5 homogeneous subgroups of women (N?=?119; 17–58 yrs) abused by their partners. Subsequent analyses revealed these 5 subtypes to differ significantly in frequency and severity of abuse, usual precipitants, typical responses of the woman and her assailant, history of violence in the family of origin, and disposition following brief residence at a shelter for battered women. (15 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Biodegradation rates of components of petroleum

Rates of microbial biodegradation of components of South Louisiana crude oil were determined by computer analysis of data obtained from computerized mass spectrometry. Total residue of the oil decreased exponentially with time, with maximum decrease noted at logarithmic phase, whereas asphaltenes and resins increased at the logarithmic phase of growth. Saturates decreased continuously during growth. Microbial degradation of components of crude oil was concluded to be a dynamic process.     

Computer Analysis of Time-Varying Images

Only a few years ago, even the simplest image processing operations strained state-of-the-art computers to their limits. 128 x 128 arrays took a lot of memory, and even the most trivial operations required enormous amounts of time. Then, with faster computers and cheaper memory, the technology finally began to catch up. Today, image operations are still time consuming, but it is no longer unthinkable to process 512 x 512 images. Now, imaging sensors are becoming an increasingly important part of closed-loop controllers in robotics, missile guidance, the automatic tracking of moving objects, and other intelligent systems. However, these applications require real-time processing of image sequences, and once again, the demands of image processing are pushing the available technology to its limits.     

Reduction of intrinsic sinoatrial frequency and norepinephrine response of the exercised rat

Physical training is associated with a reduction of intrinsic sinoatrial activity; the present study examined the role of the parasympathetic nervous system in this reduction. Six groups of rats were studied for 10 weeks: inactive control; treadmill exercised; parasympathetic receptor blockade with atropine; exercise plus atropine; parasympathetic receptor stimulation with carbachol; and exercise plus carbachol. In vivo ISF (cardiac frequency 20 min after injection of propranolol and atropine) was measured at 3-week intervals. At the end of 10 weeks the right atrium was excised, in vitro measurements were made of ISF, and chronotropic dose-response curves to acetylcholine and norepinephrine were established. In vivo, ISF was reduced with time, the greatest reduction being found in the exercise plus atropine group; the treadmill-exercised and the atropine-treated groups also had a greater reduction than the control group. In vitro, no differences were observed in acetylcholine responses. The maximum norepinephrine chronotropic response was reduced in the treadmill-exercised and the exercise plus atropine groups. The maximum norepinephrine-induced frequency correlated with the in vitro ISF (r = 0.75). Thus, ISF was reduced with training, but this effect was independent of parasympathetic activity. The properties of the sinoatrial node which set ISF also influenced the maximum norepinephrine response.