Depressive affect: A test of behavioral hypothesis.

Behavioral hypotheses about depression suggest that depression is a function of rate of reinforcement. Initial level of depression and locus of control were hypothesized to enhance this effect. 96 normal volunteer female Ss (62 nursing students and 34 high school students) were separated into groups on the basis of median splits on MMPI D and Rotter's Internal-External Control Scale scores, and were given either 80 or 20% positive reinforcement on a pseudosocial intelligence task. The lower rate of reinforcement resulted in more depressive behavior as measured by the Multiple Affect Adjective Check List, self-confidence ratings, and response latencies. Partial support was obtained for the enhancement of the reinforcement effect with initially more depressed Ss. No locus of control effects were found. Ss who were more depressed initially underestimated the amount of positive feedback they received. Results are discussed in terms of behavioral accounts of depression. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Precise temperature control by a manostat utilizing a sheet of a thin film material

A new type of manostat has been developed, in which a thin-film material is utilized. It is possible to control the liquid He vapour pressure within 0.1 Torr (1.3 × 10 Nm^?2) in the range between 1 atm (1.01 × 10⁵Nm^?2) and 4 Torr (5.3 × 10²Nm^?2) by use of a thin polyethylene film sheet.     

色纺纱中棉结问题的探讨

棉结是色纺纱生产中一个重要的疵点,严重影响了成纱及布的外观质量。重点分析了原料性能、清、梳、精梳工艺等对色纺成纱棉结的影响,同时探讨减少色纺纱棉结的主要技术措施。     

沥青玛蹄脂碎石(SMA)在沪芦高速公路中的应用

通过SMA在沪芦高速公路中的应用,介绍了SMA混合料配合比设计、施工控制要求和工程应用效果。SMA路面以其优良的路用性能,目前已在上海得到推广应用。     

计算机辅助铣齿,滚齿,磨齿工艺系统

根据齿轮加工需要，我们开发了该软件。本文介绍了系统的主要内容，详细推导了机床展角公式。     

Biological variation of prostate specific antigen levels in serum: an evaluation of day-to-day physiological fluctuations in a well-defined cohort of 24 patients

PURPOSE: We evaluated the daily biological variation of serum prostate specific antigen (PSA) concentrations to determine the critical difference required between 2 consecutive PSA measurements that would indicate a significant elevation. MATERIALS AND METHODS: A total of 24 men, grouped according to clinical diagnosis and PSA, underwent phlebotomy for 10 consecutive weekdays. Duplicate serum samples were measured using 3 separate lots of Tandem-E and IMx PSA assays. The biological variation was calculated and the 2 PSA assay systems were compared. The critical difference was examined to determine the percent elevation necessary to indicate (with 95% confidence) that PSA had increased beyond what would be expected from biological and analytical variation. RESULTS: The biological variation, defined in terms of percent coefficient of variation, had a log-normal distribution with a geometric mean of 7.3% coefficient of variation and a 95th percentile value of 19.2% coefficient of variation using the Tandem-E PSA assay. Assuming an analytical variation of 5% coefficient of variation, the median critical difference was 20.5% and the 95th percentile critical difference was 45.8%. There was no significant difference between the 2 PSA assay systems in biological variation. However, PSA concentrations measured by the IMx assay were consistently lower compared to values measured by the Tandem-E assay. CONCLUSIONS: Characterizing the biological variation of serum PSA assists in evaluating the significance of changes in serial PSA measurements. The degree of biological variation differs among patients, such that an increase between 2 consecutive PSA levels that is less than 20 to 46% may be due to biological and analytical variation. These data influence interpretation of repeated measurements of serum PSA with time.     

踢“波”游戏

通过故事,说明如果是为了逃避责任去找原因,最终是难能把真正的原因找出来的.     

现代制造技术及其在石油机械制造业中应用的探讨

介绍了成组技术（GT）、计算机集成制造系统（CIMS）、并行工程（CE）、精节生产（LP）等现代制造和管理技术的主要特点，建设石油机械制造企业应利用新技术对传统的生产模式进行变改，使单件、小批量生产方式按批量生产方式组织生产和管理，以提高企业整体效益。     

Modified reentrant Dewar for magneto-optical flux detection in superconductors

The design and construction details of a Dewar tailpiece for magneto-optical studies on superconducting films is described. The modified design allows the convenient use of high-power hot-stage objectives, increasing considerably the spatial resolution of the microscope.