温州霓屿料场露天矿边坡稳定性分析

以温州市专供料场露天矿高边坡为工程依托,对边坡局部水平位移和竖向位移进行实时监测分析,并利用岩土分析软件FLAC 3D对实时监测区域进行数值模拟分析,从监测和数值模拟2个方面来判断边坡的稳定性.根据监测和模拟分析结果可知:边坡在监测初期位移值变化较大,之后变化值便趋于平缓,最终累计位移值在安全警戒值内,边坡整体处于稳定...     

Physiological responses of elite Laser sailors to 30 minutes of simulated upwind sailing

In this study, we tested the hypothesis that elite dinghy sailing is a whole-body, dynamic, repeated-effort sport, and that increased heart rate and oxygen consumption reflect its dynamic element. Six elite male Laser sailors (mean age 19.7 years, s = 1.82; height 1.81 m, s = 0.03; body mass 78.0 kg, s = 4.1) performed a cycle ergometer test to volitional exhaustion to determine peak oxygen uptake (VO(2peak)) and a simulated 30-min upwind leg sail on a specially constructed Laser sailing ergometer. The simulation protocol was based on video analysis of previous Laser World Championships. Expired gases were collected in Douglas bags, heart rate recorded at rest and after every 5 min, and pre- and post-simulation capillary blood samples taken for blood lactate analysis. Results were analysed with a one-way analysis of variance. Mean VO(2peak) was 4.32 l . min(-1) (s = 0.16). Mean simulation VO(2) was 2.51 l . min(-1) (s = 0.24) and peaked at 2.58 l . min(-1) (s = 0.25) during the 5th minute. Mean simulation heart rate was 156 beats . min(-1) (s = 8), peaking during the final minute at 160 beats . min(-1) (s = 10). These results suggest that, unlike pseudo-isometric static hiking, elite dinghy sailing demands a substantial proportion (58%VO(2peak), s = 5.6) of aerobic capacity.     

On the theory and measurement of reading comprehension

This paper suggests that reading comprehension must involve an interaction between the reader's world knowledge and the incoming linguistic message. We call this the minimal comprehension principle. After examining the measurement of reading comprehension from the perspective of the minimal comprehension principle, we conclude that most existing tests of reading comprehension are likely to be unsatisfactory for the purposes of assessing educational gain and diagnosing reading difficulty. We suggest several techniques which might be more suitable for these purposes.     

Evaluation of Self by Young People with Down Syndrome

There have been relatively few studies of self-esteem with young people with moderate and severe intellectual disability. One reason for this is likely to be measurement difficulties. The purpose of the present study was to assess the usefulness of three measures of self-esteem in 72 young people with Down syndrome aged from 17 to 24 years. Forty-five young people, mean VMA 5 years 10 months, were assessed on the Pictorial Scale of Perceived Competence and Social Acceptance for Young Children and the Joseph PreSchool and Primary Self-Concept Screening Test. Nineteen young people, mean VMA 8 years 9 months, completed the Self-Perception Profile for Learning Disabled Students. Validity was assessed by reading scores and by interviews with the young people and their parents. Eight young people with the most severe intellectual disability could not do any test; the remainder were able to respond to the format of the appropriate tests. On all measures they rated themselves positively. Internal consistency estimates were high, but validity was only demonstrated for the Self-Perception Profile for Learning Disabled Students, supporting its use with the young people who had VMAs of around 7 years. Evaluation of self also showed a standard developmental trend.     

Alcohol as a cue for extinction: State dependency produced by conditioned inhibition

A conditioned-emotional-response (CER) paradigm was used in two experiments to evaluate the effects of alcohol on extinction. In both experiments, rats received tone-shock pairings without alcohol and then received extinction trials either with or without alcohol (injections of saline, .75 or 1.5 g/kg ethanol). The high dose of alcohol suppressed baseline barpressing for food reward, but there was only weak evidence (Experiment 2) that it enhanced responding during the tone early in extinction. In both experiments, extinction of CER under the high alcohol dose was found to be state dependent, that is, post-extinction tests after saline injection showed a reinstatement of suppression to the tone. Experiment 2 indicated that this effect could be attributed to alcohol’s becoming a conditioned inhibitory stimulus as a result of its association with extinction. This supports the general suggestion that situational stimuli normally become inhibitory during the course of simple extinction and may have implications for the role that state-dependent learning plays in drug dependence.     

The interactions of normal and hyperactive children with their mothers in free play and structured tasks.

Groups of 20 normal and 20 hyperactive boys ranging in age from 6 to 12 years were observed interacting with their mothers in 15-min free-play and 15-min structured-task situations. Using a 15-sec interval coding procedure, 1 observer recorded the mother's response to specific antecedent behaviors of the child while a second observer recorded the child's response to specific behaviors of the mother. Hyperactive boys proved more active, less compliant, and less likely to remain on task than nonhyperactive peers. Mothers of hyperactive boys were less likely to respond positively to the child's social interactions, solitary play activities, or compliant on-task behavior. In addition, mothers of hyperactive boys imposed more structure and control on the child's play, social interactions, and task-oriented activities. It is suggested that the controlling intrusive style observed among the mothers of hyperactive boys, while initially a response to the child's overactive, impulsive, inattentive style, may further contribute to the child's behavioral difficulties.     

Development of the Physical Activity Class Satisfaction Questionnaire (PACSQ)

The purpose of this study was to develop the Physical Activity Class Satisfaction Questionnaire (PACSQ). In Study 1, qualitative data were collected from 16 students. The results, coupled with a review of the relevant literature, helped to construct the various dimensions of satisfaction. In Study 2, a quantitative questionnaire was developed and administered to 194 students; based on the results, slight changes were made to the questionnaire. Additional data were then collected in Study 3 from 179 students to test the revised questionnaire. The PACSQ consists of nine dimensions of satisfaction: Mastery Experiences, Cognitive Development, Teaching, Normative Success, Interaction with Others, Fun and Enjoyment, Improvement of Health and Fitness, Diversionary Experiences, and Relaxation. The findings have implications for physical activity class instructors and for program managers.