The effects of an increasing versus constant crank rate on peak physiological responses during incremental arm crank ergometry

We examined the effects of concomitant increases in crank rate and power output on incremental arm crank ergometry. Ten healthy males undertook three incremental upper body exercise tests to volitional exhaustion. The first test determined peak minute power. The subsequent tests involved arm cranking at an initial workload of 40% peak minute power with further increases of 10% peak minute power every 2 min. One involved a constant crank rate of 70 rev · min(-1), the other an initial crank rate of 50 rev · min(-1) increasing by 10 rev · min(-1) every 2 min. Fingertip capillary blood samples were analysed for blood lactate at rest and exhaustion. Local (working muscles) and cardiorespiratory ratings of perceived exertion (RPE) were recorded at the end of each exercise stage. Heart rate and expired gas were monitored continuously. No differences were observed in peak physiological responses or peak minute power achieved during either protocol. Blood lactate concentration tended to be greater for the constant crank rate protocol (P = 0.06). Test duration was shorter for the increasing than for the constant crank rate protocol. The relationship between local RPE and heart rate differed between tests. The results of this study show that increasing cadence during incremental arm crank ergometry provides a valid assessment of peak responses over a shorter duration but alters the heart rate-local RPE relationship.     

脱口秀

小牛多少带有点爆冷嫌疑的夺冠,令现场的情绪瞬间爆棚,马克·库班成了首先的采访对象,接下来,无论是更衣室外的通道,还是新闻发布会的现场,无论是胜利者还是失意人,都得到了宣泄情绪的机会。请相信我,这也许是NBA总决赛历史中最沉重的一次赛后发布会,相比较媒体送给胜利者的歌颂和恭维,失利一方得到的却是一轮又一轮的重磅炸弹,炸得他们体无完肤、无地自容。     

OPINION QUALITY IN PUBLIC OPINION RESEARCH

In recent years, a number of new techniques have been developed—includingdeliberative polls and educational surveys—that attemptto gather measures of public opinion that is of higher quality(i.e. better informed or more deliberative) than that recordedin typical mass opinion surveys. This paper addresses severalgeneral sets of questions. What is meant by ‘quality’in public opinion? What criteria can be enumerated by whichthe quality of public opinion can be assessed? In grapplingwith these questions, the paper argues that conceptions of qualityin public opinion are inextricably bound to broader conceptionsof quality in democratic decision making, a complex processinvolving multiple phases and collective participants. In addition,a number of important contradictions and ambiguities underlieconceptions of quality in public opinion.     

Experiential Groups in Counselor Education: Student Attitudes and Instructor Participation

Students in master's‐level courses in group work were surveyed regarding their attitudes toward the use of an experiential group activity as a component of their training, as well as the level of instructor involvement in these experiential groups. Students agreed that the experiential group was an effective and necessary teaching tool; however, a substantial minority indicated discomfort with the activity. Also, although the majority of instructors did not directly lead the experiential group, most either observed or received feedback on participation.     

The Effects of Background Music on Primary School Pupils' Task Performance

Research on the effects of background music has a long history. Early work was not embedded within a theoretical framework, was often poorly conceptualised and produced equivocal findings. This paper reports two studies exploring the effects of music, perceived to be calming and relaxing, on performance in arithmetic and on a memory task in children aged 10-12. The calming music led to better performance on both tasks when compared with a no-music condition. Music perceived as arousing, aggressive and unpleasant disrupted performance on the memory task and led to a lower level of reported altruistic behaviour by the children. This suggests that the effects of music on task performance are mediated by arousal and mood rather than affecting cognition directly. The findings are discussed in relation to possible practical applications in the primary school and the home.     

Math and Science Scholars (MASS) Program: A Model Program for the Recruitment and Retention of Preservice Mathematics and Science Teachers

The shortage of certified teachers in mathematics and science in Texas classrooms is a major concern and mirrors national tends. Dramatic increases in shortages of teachers have stimulated the design of new certification programs that recruit and place teachers in classrooms as quickly as possible (Texas Center for Educational Research, 1999). While maintaining several of the characteristics of traditional certification programs, the Math and Science Scholars (MASS) Program streamlines the certification process, supports preservice students through tuition remission and scholarships, and provides quality mentoring and early fiend experiences in K–12 classrooms with well-qualified teachers. The strategies in this model program are dramatically increasing the numbers of undergraduate majors in mathematics and science considering high school teaching as a career.     

Using Robotics to Motivate ‘Back Door’ Learning

This paper suggests that robotics can provide a vehicle for guiding primary and secondary school children toward an effective understanding of programming and engineering principles. It observes that children find robotics stimulating and motivating, and that their interest in, and focus on, making the robot do what I want leads them via the back door to learn about programming and engineering in a way that is both well-grounded and generaliseable.These observations arise from empirical studies of children participating in robotics competitions: we conducted observations and interviews with all the participating teams at two robotics events (one regional, one international), and we followed one young robotics team in a case study. The children had almost all built their robots using LEGO MindStorms for specific competitions, with soccer, rescue and dance events. The children typically worked in teams, building robots as an extra-curricular activity supported by a teacher/mentor. The children came from a variety of educational and social backgrounds.The paper considers what makes robotics motivating to children, including children who are not considered technically oriented. It describes learning that has emerged from children's experiences in building and programming robots. It describes examples of children learning subjects that they previously considered difficult and inaccessible, in order to solve problems in robotics. It describes examples of children identifying and understanding principles, concepts, and elements of practice that are fundamental to programming and engineering. It describes further how secondary school students working in teams learned that this programming and engineering knowledge has a social context.     

Teachers’ views on effective classroom management: a mixed-methods investigation in Western Australian high schools

Teachers’ views about teaching, learning and school experiences are important considerations in education. As the central participants in classroom interactions, students and teachers naturally have strong views about what it takes to manage learning and surrounding behaviours effectively. With this in mind and because we believe that ignoring the thinking of either of these stakeholders would be to the detriment of teaching and teacher education, we focused on hearing and understanding teachers’ voices about teaching, learning and classroom management. Our aim was to further clarify teachers’ perspectives on how educators create quality learning environments as well as gathering their views of various disciplinary interventions, their perceptions of challenging students and their sense of efficacy for classroom management in order to inform both policy and practice in teacher education. A survey was conducted with 50 secondary school teachers to capture their views on their classroom experiences. Follow up interviews with teachers identified by students as effective in their classroom management provided consistent reports that effective classroom managers build positive relationships with their students, manage their classrooms by establishing clear boundaries and high expectations, and engage students in their learning.

     

Educational Debt Burden Among Student Borrowers: An Analysis of the Baccalaureate & Beyond Panel, 1997 Follow-Up

Using the National Center for Education Statistics' Baccalaureate & Beyond Longitudinal Survey, a nationally representative sample of 1992–1993 college graduates, this paper examines the relationship between educational debt burden and student race, ethnic, gender and income characteristics 4 years after receiving the bachelor's degree. The results indicate strong effects of family income, race and ethnicity on excessive educational debt burden among student borrowers. That is, students from lower-income backgrounds, Blacks and Hispanics have a significantly greater risk to have excessive educational debt burden 4 years after receiving the baccalaureate degree. Students with high educational debt burdens borrow more for college and have lower average salaries than do other students.