Relationship of proxy efficacy and reliance to home-based physical activity after cardiac rehabilitation.

Objective: To examine cardiac rehabilitation program (CRP) participants' beliefs about their interventionists (proxy efficacy and reliance), self-efficacy, and exercise behavior during transition to home-based exercise. Participants and Design: Participants were 44 (16 women and 28 men) CRP outpatients (Mage = 59.43 ± 13.53 years). The design was prospective, with proxy efficacy and reliance as well as self-efficacy being used to predict two outcomes: self-regulatory self-efficacy and home-based exercise. Results: After self-regulatory efficacy reported earlier in the program was controlled for, proxy reliance predicted later program self-regulatory efficacy for home-based exercise (adjusted R2 = .10, p = .02). Proxy efficacy for self-regulation predicted home-based exercise frequency (adjusted R2 = .18, p = .01). Greater proxy efficacy for self-regulation was associated with higher exercise frequency. Conclusion: CRP participants' beliefs in the capabilities of their exercise consultants to help them develop self-regulatory skills play a role in how much exercise they do after supervised rehabilitation. Yet, individuals who strongly rely on their interventionists to assist them in exercising report weaker self-efficacy for exercising on their own. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

2004年山西中、北部电网联合反事故演习综述

分析总结了2 0 0 4年山西中、北部电网联合反事故演习,从中发现了目前电网在运行及检修安排上的一些问题;进而提出了运行调度人员在事故处理过程中,应采取的措施。     

华东电网联合反事故演习管理

电网事故具有突发性、快速性和灾难性.如何快速隔离故障、限制事故的扩大,恢复电网的正常运行,保证供电的可靠性,是电力调度人员、技术人员、安监人员研究的课题.反事故演习是解决这一课题直接、有效的方法,同时可以通过反事故演习提高调度人员的素质.详述了华东电网公司在联合反事故演习方面的管理方法,并展望了今后的发展和工作方向.     

对“电机及拖动基础“课程教学方法的探讨

针对"电机及拖动基础"课程在教学过程中出现的一些问题,分析了问题出现的原因,并结合多年的教学实践经验,从4个方面提出了解决问题的方法.     

Evaluation of performance and load in simulated rescue tasks for a novel design SCBA: effect of weight,volume and weight distribution

A self-contained breathing apparatus (SCBA) with an innovative rucksack shape that provides a better distribution of its weight over the middle and lower parts of the back (device C: 6l, 13.7 kg) was compared with two conventional SCBA which differed from each other in volume and weight (A: 6l, 15 kg, B: 6.8l, 11.7 kg). Twelve fire-fighters (27-49 yr) performed three exercises while using the three SCBA in a systematically permuted sequence. The exercises consisted of simulated rescue work under natural climatic conditions in a dwelling on the second floor and several typical elements of severe fire-fighting actions. Duration, heart rate, breathing frequency, rectal temperature, and sweat loss were recorded. Perceived exertion was rated and the carrying features of the SCBA were subjectively evaluated. The exercise was executed faster with the rucksack device, heart rates were then lower and the carrying features were evaluated as better. Thus, the weight of the SCBA was shown to be less important than its distribution.     

Exercise barrier severity and perseverance of active youth with physical disabilities.

Purpose: The authors investigated perceived exercise and physical activity barriers of active youth with physical disabilities. Research Method/Design: A 46-item exercise barrier instrument was administered to 145 youth (117 boys and 28 girls, 12 to 19 years of age). Using the Rasch model, the authors estimated barrier severity and youths' exercise perseverance. Model-data fit was determined by Infit and Outfit statistics (≥ 0.5 and ≤ 1.5). Results: Except for 1 item, the model fit the data well. The most difficult barriers that youth with physical disabilities faced were lack of time and pain or discomfort. The older youth demonstrated higher exercise perseverance than the younger youth. There were no differences in youths' exercise perseverance scores by gender or National Wheelchair Basketball Association classification. Implications: Removing severe barriers should be a part of future exercise and physical activity interventions targeting this population. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Using the theory of planned behavior to predict leisure time physical activity among people with chronic kidney disease.

Objective: To evaluate the utility of the theory of planned behavior (TPB) for explaining and predicting leisure time physical activity (LTPA) in the chronic kidney disease population. Study Design: Prospective correlational design. Participants: Eighty men (n=52) and women (n=28) with chronic kidney disease (mean serum creatinine=310.55 [±148.75] μmol/L). Method: Baseline interview assessing attitude, subjective norm, perceived behavioral control, and intention to engage in LTPA. Telephone interview 1 week later assessing frequency and intensity of LTPA. Results: Perceived behavioral control (β=.69) but not attitude (β=.17) or subjective norm (β=.02) was associated with intention to engage in LTPA. Intention (β=.53) but not perceived behavioral control (β=.18) predicted LTPA. Conclusion: These findings provide partial support for the utility of the TPB for explaining LTPA among people with chronic kidney disease. Additional research is required to determine if targeting perceived behavioral control may be an effective means for increasing LTPA in this population. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Long-term follow-up of physical activity behavior in older adults.

Objective: To examine the contribution of social-cognitive factors (self-efficacy and affect) in predicting long-term physical activity in a sample of older adults (N = 174). Design: A prospective design assessed physical activity and psychosocial variables at 2 and 5 years following a 6-month randomized, controlled exercise trial. Main Outcome Measures: The primary outcome variable was self-reported physical activity, with previous behavior, self-efficacy, and affect assessed as determinants of physical activity. Results: Covariance modeling analyses indicated that physical activity at Year 2 was the strongest predictor of physical activity at 5-year follow-up. Both self-efficacy and affect at Year 2 were also associated with physical activity at Year 5, as was original treatment condition. Variables accounted for 35% of the variance in Year 5 activity. Conclusion: Older adults with higher levels of physical activity, more positive affect, and higher self-efficacy at Year 2 were more likely to continue to be active at Year 5. This study is one of the longest follow-ups of exercise behavior in older adults and has implications for structuring environments to maximize the maintenance of physical activity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Implementation intentions, occupational stress, and the exercise intention-behavior relationship.

Many individuals intend to exercise, but fail to link this intention to behavior. The present study examined the impact of an implementation intention intervention (i.e., instructions to form specific if-then plans) on an exercise intention-behavior relationship among working adults who varied in reported occupational stress levels. Results indicated that implementation intentions backfired, such that participants who did not form an implementation intention exercised significantly more than participants who formed an implementation intention. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

西安电力交换网的建设与发展

文章分析了西安地区电力交换网的现状,提出了电力交换网的优化与改进方案以及基于VoIP平台的联合反事故演习系统建设方案。文章通过比较几种信令系统,阐述了采用Q信令组建电力交换网的优势;对行政交换机设备改造中,软交换平台的建立及应用做了说明。文章还对电力系统交换网络的发展提出具体建议。