A Comparison of Heavy Ion Sources Used in Cosmic Ray Simulation Studies of VLSI Circuits

A comparison has been made between the heavy ions from the ALICE cyclotron and Californium-252. The results of SEU cross-section measurements support the use of the CASE system (Californium-252 Assessment of Single-event Effects) to simulate cosmic ray effects in VLSI circuits.     

How inefficient is IP over ATM anyway?

The explosive interest in B-ISDN and its underlying asynchronous transfer mode (ATM) has been making itself felt throughout the telecommunications industry. The impending introduction of long and short haul links based on ATM has led to its application to packet services such as the DARPA Internet Protocol (IP). Some earlier work on IP traffic between main IP routers (WAN traffic) has led to concerns over the efficiency of using small cells. The authors describe the results of IP traffic traces taken within a departmental LAN over a 16-day period. This traffic is used to drive a model of IP-over-ATM to analyze the real efficiency of the technique     

Galerkin solution for the thin circular iris in aTE11-mode circular waveguide

An integral equation for the transverse electric (TE) field in the aperture of a concentric circular iris in a transverse plane of a circular waveguide is approximately solved using Galerkin's method. The aperture field is represented by a finite sum of normal TE and TM (transverse magnetic) circular waveguide modes that fit the circular aperture. The numerical convergence of the Galerkin solution is demonstrated using the resultant aperture field distributions and equivalent shunt susceptance for the case of dominant TE₁₁-mode excitation. The resultant aperture electric field distribution closely resembles that of the TE₁₁ aperture mode alone, except for edge contribution behavior at the edge of the iris. A resonant or capacitive iris is possible over a restricted range of frequencies     

Koppitz Bender Gestalt scores in first-grade children as related to ethnocultural background, socioeconomic class, and sex factors.

Incorporated ethnocultural, socioeconomic, and sex factors into one design, allowing comparisons under conditions of uncontrolled and controlled (by covariance) IQ conditions. In addition, the present study with 384 1st graders allowed for comparisons between reported Koppitz norms and error scores for the current sample. Findings suggest that if IQ (or IQ-mediated variables) were taken into account, the Koppitz system would be relatively uninfluenced by sex, ethnocultural, and socioeconomic status determinants. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The efficacy of the Canter Background Interference Procedure in identifying children with cerebral dysfunction.

Compared the Canter Background Interference Procedure (BIP) for the Bender-Gestalt Test using 3 groups of 8-12 yr olds: a cerebral dysfunction (n = 66), an emotionally disturbed (n = 39), and a control (n = 63) group. Ss with cerebral dysfunction performed more poorly on the Bender itself and both scores deteriorated more on the BIP than did those of Ss in the other 2 groups. The emotionally disturbed and control groups did not differ. Applications of the BIP to the detection of cerebral dysfunction in children is discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Increasing hypnotic susceptibility by means of positive expectancies and written instructions.

Investigated the extent to which hypnotic susceptibility could be modified by means of induced positive expectancies and written instructions that were designed to correct misconceptions concerning hypnosis as well as to provide concrete methods for experiencing hypnosis. 40 undergraduates were given a baseline test of hypnotic susceptibility and then randomly assigned to 1 of 4 conditions. Ss receiving the positive expectancy were given false personality test feedback that they were good hypnotic Ss prior to a criterion hypnotic scale. Ss receiving the written instructions were given 10 min to read the information prior to the hypnotic test. Other Ss browsed through magazines prior to testing in hypnosis. Both positive expectancies and written instructions were significantly effective in increasing susceptibility in comparison with practice only. Theoretical explanations are advanced and the implications of these findings are considered. (26 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Influence of gap width on mode discrimination in cleaved coupled cavity lasers

Recent publications on the C3 laser appear to have presented contradictory results for the optimum gap width to give maximum mode discrimination and thus enhance single-mode behaviour. We give here a simple analysis which shows that the optimum width is equal to an odd multiple of a quarter wavelength in cases where loss in the gap can be neglected, but to an even multiple for cases with significant gap loss.     

Caregiving outcomes for older mothers of adults with mental retardation: A test of the two-factor model of psychological well-being.

A two-factor model of caregiving appraisal and psychological well-being, based on previous findings with caregiving spouses (M. P. Lawton et al; see record 1991-34214-001) was tested with 225 older mothers who provided care at home to an offspring with mental retardation The effects of objective caregiving stressors, caregiver resources, and subjective appraisals (caregiving satisfaction and burden) on the positive and negative dimensions of psychological well-being were examined. LISREL 8 analyses revealed that the model differed in two key ways for caregiving mothers: (a) Positive psychological well-being appeared to diminish subjective burden, and (b) both objective stressors and resources were unrelated to subjective burden. These findings suggest the need for future research into how caregiving dynamics are influenced by the specific nature of the relationship between the caregiver and the recipient. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Emotional reactions to a political leader's expressive displays.

40 undergraduates viewed videotaped excerpts of happiness/reassurance, anger/threat, and fear/evasion expressive displays by US President Ronald Reagan. Within each display condition 1 excerpt was presented in image-only and 1 in sound-plus-image format. Emotional reactions were assessed by facial electromyography (EMG) from the brow and cheek regions, skin resistance, and heart rate. Following each excerpt, Ss also verbally reported the intensity of 8 emotions, including joy, interest, anger, and fear. Findings indicate that self-reported emotions were influenced strongly by both the expressive displays and prior attitude toward Reagan and by media condition. Facial EMG indicated smiling during happiness/reassurance displays and frowning during anger/threat and fear/evasion displays, especially during image-only presentations. Display effects were also found for skin resistance responses when the media conditions were combined and for heart rate changes in the sound-plus-image condition. Results indicate that expressive displays had a direct emotional impact on viewers and that prior attitudes influenced retrospective self-reports of emotion. (46 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)