射击运动员目标取向与竞赛状态焦虑的关系     

杨阿丽  冯秋实 《沈阳体育学院学报》2010,29(5)

目的:探讨射击运动员目标取向、竞赛状态焦虑的特点及二者之间的关系.方法:采用射击运动员目标取向测验和竞赛状态焦虑问卷对国家射击队、辽宁射击队、北京市射击队36名射击运动员进行调查.结果:(1)射击运动员的任务取向显著高于自我取向.国际健将级运动员任务取向显著高于国家健将和国家一级运动员,而自我取向显著低于后两者;(2)射击运动员的状态自信心得分较高.国家一级运动员的认知状态焦虑显著高于国际健将级和国家健将级运动员;国际健将级运动员的躯体状态焦虑显著低于国家一级运动员;国际健将级运动员的状态自信心显著高于国家健将级和国家一级运动员;(3)自我取向高分组的运动员认知状态焦虑更高,状态自信心更低;任务取向高分组的运动员认知和躯体状态焦虑更低,状态自信心更高.(4)自我取向显著正向预测认知状态焦虑,解释率为31.3%;任务取向显著负向预测躯体状态焦虑,解释率为17%;自我取向显著负向预测状态自信心,解释率为27.3%,任务取向显著正向预测状态自信心,解释率为35.5%.结论:运动级别越高的运动员越倾向于任务取向,认知和躯体状态焦虑越低,状态自信心越高.  相似文献   

In vitro Antioxidant,Cytotoxic and Antidiabetic Activities of Protein Hydrolysates Prepared from Chinese Pond Turtle (Chinemys reevesii)     

Md. Serajul Islam  Wang Hongxin  Habtamu Admassu  Amer Ali Mahdi  Ma Chaoyang  Fu An Wei 《Food Technology and Biotechnology》2021,59(3):360

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Evaluation of Oxidative Stress and Antioxidant Status in Pregnant Anemic Women     

Tiwari AK  Mahdi AA  Zahra F  Chandyan S  Srivastava VK  Negi MP 《Indian journal of clinical biochemistry : IJCB》2010,25(4):411-418

The present study was conducted to investigate the oxidant–antioxidant status in iron deficient pregnant anemic women. One hundred thirty pregnant women with iron deficiency anemia (IDA) were divided into three groups, namely mild (50), moderate (50) and severe (30) anemic along with pregnant healthy women as controls (50). The complete blood count, plasma lipid peroxidation products, enzymatic and non-enzymatic antioxidants were measured according to respective protocols. The levels of complete blood count, iron, ferritin along with antioxidant enzymes namely catalase, superoxide dismutase, glutathione peroxidase, glutathione reductase and reduced glutathione were significantly reduced in all IDA groups. However, the level of oxidized glutathione, lipid peroxides, protein carbonyls, conjugated dienes were found significantly increased in all anemic patients. Antioxidant vitamins, namely C, E and A were also found significantly decreased in IDA patients. On the basis of our results, it may be concluded that IDA tends to increase the pro-oxidant components, which may result in various complications including peroxidation of vital body molecules resulting in increased risk for pregnant women as well as fetus.  相似文献   

TS fuzzy robust L1 control for nonlinear systems with persistent bounded disturbances     

Navid Vafamand  Mohammad Hassan Asemani  Alireza Khayatian 《Journal of The Franklin Institute》2017,354(14):5854-5876

In this paper, a novel technique for Takagi–Sugeno (TS) model-based robust L₁ controller design of nonlinear systems is proposed. Two synthesis methods based on quadratic and non-quadratic Lyapunov functions are considered. To design the robust stabilizing controller, a new approach for deriving sufficient conditions associated with the L₁ performance criterion in terms of strict linear matrix inequality is proposed. This novel technique results in less pre-chosen scalar design variables and calculation burden. Furthermore, deriving the controller synthesis conditions via a non-quadratic Lyapunov function (NQLF) relaxes the obtained conditions. Therefore, the proposed approaches not only efficiently minimize the effect of persistent bounded disturbance, but also are applicable for wider classes of TS systems. Furthermore, some new lemmas are proposed to facilitate strict LMI formulation and to provide more degrees of freedom. Finally, several numerical and practical examples are presented to show the merits of this paper.  相似文献   

一种有效的余弦调制滤波器组的设计方法     

刘孟娟  胡阿丽 《陕西广播电视大学学报》2009,11(1):93-96

本文给出了一种有效的余弦调制滤波器组的设计方法。这种算法采用了内插法和迭代算法相结合设计原型滤波器,目标函数表示为滤波器系数的四次方,用迭代算法来优化滤波器的系数。这种方法使需要优化的参数大大减少。最后的实例仿真,验证了此算法的有效性。  相似文献   

Internationalization of higher education： Challenges, strategies, policies and programs   总被引：1，自引：0，他引：1  

Akbar Zolfaghari Mohammad Shatar Sabran Ali Zolfaghari 《美中教育评论》2009,6(5):1-8,20

In today＇s changing world, the idea of internationalization of higher education especially in developing countries has been deduced from globalization of education process. The international aspect of higher education is becoming increasingly important, composite, and confusing. The higher education has an effect on the society through policy-making, funding, and planning. The purpose of this paper is to analyze the meaning, definition, importance, necessity, and pre-requisites of internationalization of higher education. This paper also studies the programs and strategies of internationalization of higher education. Key challenges for the future direction of internationalization are identified in this paper.  相似文献   

Organizational culture,values, and routines in Iranian medical schools     

Ali Bikmoradi  Mats Brommels  Alireza Shoghli  Davoud Khorasani Zavareh  Italo Masiello 《Higher Education》2009,57(4):417-427

In Iran, restructuring of medical education and the health care delivery system in 1985 resulted in a rapid shift from elite to mass education, ultimately leading to an increase in the number of medical schools, faculties, and programs and as well as some complications. This study aimed to investigate views on academic culture, values, and routines held by faculty members. A nation-wide survey conducted in six public medical schools in Iran. The research findings show weak organizational culture and values, together with routine behaviors sensed as a negative and low satisfaction with academic leadership. The research evidence suggests bureaucracy, politicization, conservativeness, and centralization as common features of medical schools in Iran and also suggests suitable supervisory skills to tackle the tension between governmental management and academic leadership with cultural changes, the creation of new values, and adoption more efficient routines.  相似文献   

Integrating Gender and Group Differences into Bridging Strategy     

Serkan Y?lmaz  Ali Ery?lmaz 《Journal of Science Education and Technology》2010,19(4):341-355

The main goal of this study was to integrate gender and group effect into bridging strategy in order to assess the effect of bridging analogy-based instruction on sophomore students’ misconceptions in Newton’s Third Law. Specifically, the authors developed and benefited from anchoring analogy diagnostic test to merge the effect of group and gender into the strategy. Newton’s third law misconception test, attitude scale toward Newton’s third law, and classroom observation checklists were the other measuring tools utilized throughout this quasi-experimental study. The researchers also developed or used several teaching/learning materials such as gender and group splitted concept diagrams, lesson plans, gender splitted frequency tables, make sense scales, PowerPoint slides, flash cards, and demonstrations. The convenience sample of the study chosen from the accessible population involved 308 students from two public universities. The results of multivariate analysis of covariance indicated that the bridging strategy had a significant effect on students’ misconceptions in Newton’s third law whereas it had no significant effect on students’ attitudes toward Newton’s third law.  相似文献   

Entrepreneurial attributes among postgraduate students of a Pakistani university     

Akhtar Ali Keith J. Topping Riaz H. Tariq 《美中教育评论》2010,7(5):66-77

This paper explores entrepreneurial attributes among the students of The Islamia University of Bahawalpur, a public sector Pakistani university. Multistage sampling was employed to maximize the representation. Five hundred and twenty one master＇s level students from thirty departments returned completed questionnaires. Three factors emerged： self efficacy, efficiency and commitment, and entrepreneurial inclinations. The majority of the students exhibited positive entrepreneurial attributes. However, there was no significant difference between negative and positive entrepreneurial attributes. There was no significant impact of demographic variables such as gender, parental income and profession on entrepreneurial attributes. Impact on practice and policy is discussed.  相似文献   

An approach to develop physics student teachers＇ skills of using instructional technology     

Devecioglu Yasemin Akdeniz Ali Riza 《美中教育评论》2010,7(8):95-101

It is very important to develop student teachers＇ skills and knowledge during the pre-service teacher education process. In this study, the effectiveness of the approach in which student teachers＇ gained skills of developing and using TGMs （teacher-guided materials） based on integration of technology on physics education in STMC-Ⅱ （Special Teaching Methods Course-Ⅱ） for pre-service physics teachers was evaluated. The study was conducted with 33 physics student teachers in KTU （Karadeniz Technical University）. Student teachers were required to develop and present TGMs, which were based on principles of special teaching approaches and techniques and integration of technology through instruction. The data of the study were gained from semi-structured interviews conducted with 14 student teachers, observations of the lessons conducted by each student teacher and document analysis of the student teachers＇ diaries collected during the term. The student teachers stated that STMC-11 was a very helpful experience to gain teaching skills. It is believed that all these activities, which are designed and performed in the classroom by student teachers during STMC-Ⅱ course, will not only prepare them for their teaching but also help them gain basic experiences that they will need in their future career. At the end of the process, it is concluded that all the student teachers gained nearly the whole defined aims--skills and knowledge of the STMC-Ⅱ. The implementation process should be organized very well to have advance of gaining many skills together. Key words： physics student teacher; STMC-Ⅱ; the skills of developing TGMs and integration of technology  相似文献