An Inexpensive Digital Integrator for Gas Chromatography

SUMMARY

An inexpensive gas chromatographic integrator with digital readout is described. The device is precise to ±1 count and shows linear response to within ±2%. It is directly compatible with flame ionization detectors and is easily adapted to thermal conductivity detectors.     

Automatic detection and tracking of moving image target with CNN‐UM via target probability fusion of multiple features

A high speed target detection and tracking algorithm for a CNN‐UM chip is presented in this paper. The target confidence value is computed based on the fusion of target existence probabilities of features using products of weighted sums. The target decision is done with such a confidence value and target initiation is done through the temporal accumulation of the confidence. The probability of the target existence for each feature is created in the region of influence depending on the reliability and the strength of the feature. By virtue of the analogic parallel processing structure of the CNN‐UM (Roska T, Chua LO. The CNN universal machine: an analogic array computer. IEEE Trans. Circuits Systems II 1993; CAS‐40 : 163–173), real time tracking can be achieved with presently available technologies with the speed of several kilo‐frames per second. Due to the utilization of multiple features of target, robust target detection is possible via the proposed algorithm. On‐chip experiments of the proposed target‐tracking algorithm have been done and properties of the proposed approach are disclosed through the various experiments. Copyright © 2003 John Wiley & Sons, Ltd.     

Motivation of Engineering Students to Participate in Teaching Evaluations

This study employs expectancy theory to evaluate some key factors that motivate students to participate in the teaching evaluation process. The results show that engineering students generally consider the improvement of teaching to be the most important outcome of teaching evaluations, followed by the improvement of course content and format. Making the results of evaluations available for students' decisions on course and instructor selection ranked third, while the least important use was influencing a professor's tenure, promotion, and salary raise. Students' motivation to participate in teaching evaluations is also impacted significantly by their expectation that they will be able to provide meaningful feedback.     

Exploratory play as an index of mastery motivation: Relationships to persistence, cognitive functioning, and environmental measures.

To measure exploratory play at 1 yr of age, 41 middle-class infants were observed in a free-play setting. In a separate session, 11 structured tasks assessed the infants' persistence in mastering tasks. In a 3rd session, the Bayley Scales of Infant Development were given. As part of another study, home observations were available for 40 of the infants at 1 yr of age and for 23 of the infants at 6 mo of age. Measures of quantitative aspects of exploratory play showed no relationship to persistence or cognitive development; however, measures indexing the quality of exploratory play did. In addition, environmental measures at both 6 and 12 mo were related to exploratory play at 1 yr, particularly to the production of perceptual effects; but some of these findings were opposite to those expected. Results suggest that the quality of exploratory play, rather than the quantity, is a better index of underlying mastery motivation. In addition, the widely accepted assumption of a link between the amount of general exploration and cognitive ability needs to be reexamined. (27 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A field comparison of neck and shoulder postures in symptomatic and asymptomatic office workers

Poor neck and shoulder postures have been suggested to be a cause of neck and shoulder pain in computer workers. The present study aimed to evaluate and compare the head, neck and shoulder postures of office workers with and without symptoms in these regions, in their actual work environments. The two all female subject groups reported significantly different discomfort scores across five trials repeated in a single working day. The results of repeated video capture and two-dimensional motion analysis showed that there were trends for increased head tilt and neck flexion postures in the symptomatic subjects (n = 8), compared to the asymptomatic subjects (n = 8). Symptomatic subjects also tended to have more protracted acromions compared with asymptomatic subjects and showed greater movement excursions in the head segment and the acromion. All subjects demonstrated an approximately 10% increase in forward head posture from their relaxed sitting postures when working with the computer display, but there were no significant changes in posture as a result of time-at-work.     

改进缺陷,套刻和聚焦性能的第五世代浸没式曝光系统

论述了第五世代双扫描平台浸液式扫描曝光机的性能和进展。表明了在高速扫描状态下有生产价值的套刻和聚焦性能的实现。浸液式设备更多的关键部分与缺陷有关,而且该机的改进是通过有生产价值的缺陷水平方面来体现的。为了保持这种缺陷水平的改进效果,需要在圆片应用中进行专门稳定的测量。特加是边缘空泡除去(EBR)设计和圆片斜面良流线性是很重要的。     

A Nonlinear Time-Varying Mathematical Analog of the Gluco-Corticoid Control

The basic characteristics contributing to the nonlinear time-varying gluco-corticoid control mechanism in 300-gram male rats fasted 18 hours have been formulated. Intact animal time responses of the plasma levels of corticosterone to intraperitoneally injected doses of 50, 200, and 500 ?g/kg simulated on an analog computer were compared with the experimental results. Nonlinear time-dependent characteristics of the hypothalamic-hypophyseal complex, previously unobtainable experimentally, were arrived at indirectly through the use of experimental data and simple control theory analysis. Involved compartmental analysis of the complex kinetics for the intraperitoneally injected dose was bypassed by using experimental data and concepts of control mechanisms. The model was found to be compatible with the linear model of Yates.     

Programs and Systems for On-Line Computers in Low Energy Nuclear Physics

A conference held five years ago this month served, among other things, to introduce the notion to a substantial representation from the community of experimental nuclear physicists that a stored program computer could be used as a powerful, flexible tool for extending the scope of, as well as for aiding in the detailed execution of their experimental programs. The appreciation of the possibilities which were raised were colored by a simultaneous apprehension. The physicists worried about how extensive an effort they would have to make, how intimately they would have to be involved in order to use a computer on-line to an experiment. In short - who was going to write the programs? The answer was, unfortunately, not long in coming - they were. The potential gains for some classes of users were such that they did not wish to leave the restricted world of wired-program analyzers which, after all, were sufficient unto their needs. For others, however, the ends justified the means of the task. This latter group set about creating the programs and, in fact, the systems of programs that were necessary. This paper discusses some of the programming approaches which are in use or are under development for handling all or some features of experiment procedures. Because this conference has reports directly by several of the users, the emphasis here will be to review and compare rather than describe any in great detail.