Acute skin GVHD following syngeneic BMT for CLL

A 41-year-old woman received a syngeneic BMT for CLL and subsequently developed acute skin GVHD. Transfusion-related allogeneic GVHD was excluded on the basis of an unchanged HLA type in circulating lymphocytes. Short tandem repeat PCR was used to confirm syngeneicity between donor and recipient. The patient had a personal and family history of autoimmune disease which may have made her particularly susceptible to development of syngeneic GVHD. The distinction between allogeneic and syngeneic or autologous GVHD is important because of therapeutic implications.     

Distributed call rerouting in multiclass broadband networks

Broadband integrated services digital networks (B-ISDN) must handle multiclass traffic with diverse quality of service requirements. We consider a multiclass routing model in which routes are calculated in a distributed fashion by the call originating nodes. Within this general context, we address the problem of rerouting a set of previously routed calls to avoid a failed link. Under the approach we propose, a single node executes an aggregate, global rerouting of all affected calls and then converts the set of aggregate routes into an allocation of bandwidth on each link to call origination nodes for the purpose of rerouting. The bandwidth allocation is distributed to each origination node, which in turn then calculates routes for the individual calls. The problem faced by each call origination node is a variant of the socalled bandwidth packing problem. We develop and analyze an approximate algorithm for solving this problem in the specific context that arises in our setting.The research was supported by IBM Corporation and by NSF Grant No. CDR-8803012.On personal leave from IBM RTP.     

IQ and delinquency: A direct test of the differential detection hypothesis.

A number of studies have reported that juvenile delinquency is negatively related to IQ scores. The IQ/delinquency relation has been questioned on the basis of the differential detection confound, which attributes the apparent relaton to biased likelihood of detection, and thus inclusion in research, of low-IQ delinquents. A direct test of the differential detection hypothesis was conducted by comparing the mean IQ scores of two groups of delinquent subjects from the same birth cohort. Group 1 had been detected in delinquent acts by police. Group 2 was not known to police, but was equivalent to Group 1 on amount and seriousness of self-reported delinquency. The two groups did not differ significantly on IQ, but both groups scored significantly below nondelinquent cohort members. Results were inconsistent with the prediction of group differences posed by the differential detection hypothesis. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Occupational differences in computer-related anxiety: implications for the implementation of a computerized patient management information system

The present investigation was concerned with the implementation of an information system within a health care setting. A large number of staff required training on a new patient management information system (MIS). The aim of this study was to assess occupational differences on a number of psychological variables associated with MIS success. Computer anxiety was of primary concern due to its relationship to avoidance of computers. A total of 175 questionnaires were distributed, with 103 questionnaires being completed and returned for analysis (61.1%). It was found that clerical/administrative staff had significantly higher self-efficacy regarding computer use and more experience with computers. The nursing group experienced significantly more, computer anxiety, negative attitudes, and negative expectations than the clerical group. Self-efficacy was found to be the best predictor of computer related anxiety. The results have implications for MIS implementation strategies particularly in the areas of training and resource allocation.     

The von Restorff effect in rats (Rattus norvegicus).

Two experiments examined the functional equivalence of memory in the rat (Rattus norvegicus) with memory in humans for serially presented items. Memory was assayed with an 8-arm radial maze, in which rats were allowed access to 5 arms of the maze and were then removed. Following a retention interval of 16 min, the rats were replaced in the maze and allowed to retrieve pellets from the 3 unvisited arms. The errors in reentering previously visited arms were noted. Both primacy and recency effects were found as with humans. Presenting a stimulus change after entry to 1 of the maze arms improved recall for that arm relative to when no change occurred. This effect was found using both handling and tone cues, and irrespective of whether the change consisted of presentation or nonpresentation of the cue. These results suggest that rats are subject to a von Restorff-like effect similar to that in humans. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Influence of interresponse time reinforcement on signalled-reward effect.

Examined the conditions under which presenting a signal for reinforcement decreases or increases the rate of leverpressing in rats. Response rate on a variable-interval (VI) schedule of reinforcement was decreased by a brief signal for reinforcement. In Experiment 1, requiring 1 short IRT to occur on completion of the VI requirement attenuated this response decrement. Requiring three responses to be emitted within a minimum amount of time at the end of the VI resulted in the reinforcement signal's enhancement of response rates. Experiment 2 replicated this increase in responding and showed that the reinforcement signal attenuated response rates on a simple VI schedule that yielded the same overall rate of reinforcement. In Experiment 3, the reinforcement signal enhanced response rates when 3 responses were required at the end of a VI schedule, but the signal attenuated response rates when the 3 responses could occur at any time in relation to the VI. These results suggest that the pattern of responding emitted immediately prior to reinforcement is a critical factor in determining the effect of reinforcement signal on response rate. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

High-strain-rate superplasticity in aluminum-matrix composites

Recent progress in high-strain-rate superplastic forming of aluminum metal-matrix composites has highlighted the potential of these materials for the mass production of complex shapes. This article reviews the current scientific understanding of this subject and identifies the areas where future work is needed to develop the technology to the manufacturing stage.     

Zen meditation and behavior self-control: Similarities, differences, and clinical applications.

Studies the behaviors involved in 2 self-control strategies: Zen meditation and behavioral self-management. The first technique is derived from the Eastern "religious-philosophical" tradition of Zen Buddhism; the other is derived from Western laboratory and field settings and is based on social learning theory. Using naturalistic observation and experimental analysis, Zen breath meditation is conceptualized as a sequence of behaviors involving certain cues and consequences, and thereby under explicit contingency arrangements. Behavioral self-management techniques are similarly analyzed, and results of these analyses are compared and contrasted. After briefly reviewing the clinical outcome literature for both strategies, it is concluded that rehabilitative and preventive benefits may be gained from a combination of the 2 techniques. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Judgments of consensus during group discussion.

6 groups of Ss held discussions during which the individuals' opinions and estimates of the group consensus were privately taken on various issues. "The degree of estimation accuracy achieved was not noticeably different from the accuracy found by other investigators under conditions of no discussion." (PsycINFO Database Record (c) 2010 APA, all rights reserved)