Self-Testing the Motorola MC6804P2

The internal serial architecture of the MC6804P2?Motorola's smallest 8-bit, single-chip microcomputer?and the need to minimize test costs led to development of a built-in self-test scheme. The self test is based on a ROM-driven signature analysis technique that utilizes polynomial division to compress lengthy output responses (or signatures) to much smaller results. On-chip signature analysis is an attractive alternative to conventional testing. The signature register, associated control logic, and 288 bytes of self-test ROM occupy less than 5 percent of total chip area. High fault coverage and support for parametric testing with minimal chip area are keys to successful application. This was the authors' first experience with on-chip signature analysis in a commercial MOS microcomputer, but the usefulness of the technique for testing and data compression will undoubtedly find its way into future Motorola products.     

Perceiving the sex and race of faces: the role of shape and colour

Theories of object recognition have emphasized the information conveyed by shape information, whereas theories of face recognition have emphasized properties of superficial features. In the experiments reported here we used novel technology to investigate the relative contributions of shape and superficial colour information to simple categorization decisions about the sex and 'race' of faces. The results show that both shape and colour provide useful information for these decisions; shape information was particularly useful for race decisions while colour dominated sex decisions. When both sources of information were combined, the dominant source depended on viewpoint, with angled views emphasizing the contribution of shape and the full-face view colour. The results are discussed within the context of theories of face recognition and their implications for telecommunication applications are considered.     

Research themes in counseling psychology: A cluster analysis of citations in the process and outcomes section of the Journal of Counseling Psychology..

27 studies were selected from 1982 issues of the present journal and were compared with one another with respect to their citations to examine the degree to which the studies researched the same domains. An index of similarity based on common citations was calculated for each pair of studies, and a single-link cluster analysis was performed. Results indicate that the social influence model was the primary representative model for 1982 research into process and outcome. Similar analyses for 1974, 1977, and 1980 confirmed that the social influence model is a recurrent research theme. (16 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Recording from the Aplysia Abdominal Ganglion with a Planar Microelectrode Array

A passive multimicroelectrode array has been fabricated and used to record neural events from the abdominal ganglion of the marine mollusk, Aplysia californica. The array consists of a pattern of gold conductor lines on a glass substrate which is insulated with a polyimide. The 32 electrodes are 25, in diameter and are arranged in a 4 x 8 matrix on 200 um centers. The array is durable and reusable, and can be safely autoclaved. The recording environment surrounding each electrode is sufficiently uniform so as to permit spatial localization of identified cells in the ganglion. The array can record large numbers of unique and often interrelated extracellular neural potentials in relatively simple experiments.     

Do alcohol expectancies mediate drinking patterns of adults?

Compared the reinforcement expectancies of adult alcoholics with beliefs of 2 other adult populations. 171 participants (mean age 42.8 yrs) in alcohol treatment programs, 65 hospitalized medical patients (mean age 42.6 yrs), and 344 college students (mean age 24 yrs) identified their beliefs about the consequences of alcohol consumption through an alcohol expectancy questionnaire (AEQ). Results indicate that the previously defined AEQ beliefs among nonalcoholic populations identified by S. A. Brown et al (1980) and B. A. Christiansen et al (see record 1982-25609-001) are applicable to alcoholic populations. In the present study, nonalcoholics and alcoholics differed significantly in terms of their alcohol expectancies. In general, alcoholics were found to maintain strong alcohol expectancies, and expectancies increased across and within populations as a function of drinking patterns. Theoretical, research, and clinical implications of these findings and the AEQ are discussed. (18 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Male preferences for unmated versus mated females in two species of voles (Micotus ochrogaster and M. montanus).

Examined male preference for unmated vs mated females in 2 species of voles, using 73 prairie voles and 78 montane voles in 2 testing situations each. In Exp I, conducted in a tether test situation, prairie voles spent significantly more time and copulated more with unmated than with mated females. In Exp II, male prairie voles spent significantly more time visiting and investigating anesthetized unmated females than anesthetized mated females. In Exp III, male montane voles showed no significant visitation or copulatory preference for unmated vs mated females in the tether situation. In Exp IV, male montane voles spent more time with unmated, anesthetized females than mated females but displayed no other significant differences. In general, male prairie voles appeared more discriminating in their mate choice than male montane voles. These differences are consistent with differences in male parental effort in the field. (29 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Chronic stress impairs rat spatial memory on the Y maze, and this effect is blocked by tianeptine treatment.

Chronic restraint stress causes significant dendritic atrophy of CA3 pyramidal neurons that reverts to baseline within a week. Therefore, the authors assessed the functional consequences of this atrophy quickly (within hours) using the Y maze. Experiments 1–3 demonstrated that rats relied on extrinsic, spatial cues located outside of the Y maze to determine arm location and that rats with hippocampal damage (through kainic acid, colchicine, or trimethyltin) had spatial memory impairments. After the Y maze was validated as a hippocampally relevant spatial task, Experiment 4 showed that chronic restraint stress impaired spatial memory performance on the Y maze when rats were tested the day after the last stress session and that tianeptine prevented the stress-induced spatial memory impairment. These data are consistent with the previously demonstrated ability of tianeptine to prevent chronic stress-induced atrophy of the CA3 dendrites. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Story and list recall tests as measures of verbal memory in a head-injured sample.

Memory components of story and list recall were derived for 48 head-injured patients (mean age 33.5 yrs) using regression techniques. Ss completed such measures as the Wechsler Memory Scale. General and verbal memory components, respectively, contributed the most variance to both story and list recall under both immediate and delayed conditions. Although they share substantial variance, list and story recall were not identical. Willingness to repeat oneself contributed to all types of recall, except delayed story recall. It was hypothesized that long-term storage contributed to immediate list recall ability, active semantic organization contributed to delayed list recall ability, and attentional fluctuations contributed to delayed story recall ability. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Wireless security policies

Security policies: The phrase that strikes fear in the hearts of many security professionals. Policy and policy enforcement is a critical part of any organization’s security posture. Unfortunately, many administrators find policy mundane or frustrating. When it comes to wireless security, a clear and complete policy is even more critical. Few other technologies can punch a hole into the core of an organization’s network like wireless. Thankfully for security professionals and their employers, wireless networks are new, interesting, and dangerous enough to actually warrant interest in creating and enforcing a policy.     

Austenite grain growth kinetics in Al-killed plain carbon steels

Austenite grain growth kinetics have been investigated in three Al-killed plain carbon steels. Experimental results have been validated using the statistical grain growth model by Abbruzzese and Lücke, which takes pinning by second-phase particles into account. It is shown that the pinning force is a function of the pre-heat-treatment schedule. Extrapolation to the conditions of a hot-strip mill indicates that grain growth occurs without pinning during conventional processing. Analytical relations are proposed to simulate austenite grain growth for Al-killed plain carbon steels for any thermal path in a hot-strip mill.