Physical activity among Spanish adolescents: relationship with their relatives' physical activity - the AVENA study

Identifying factors related to physical activity levels in young people is important for a more efficient health promotion. The aims of this study were to assess physical activity levels in a national sample of urban Spanish adolescents, and to examine the association between significant others' physical activity (father, mother, brother, sister, and close friends) and that of the adolescents. The present study comprised 2260 adolescents (1157 boys, 1103 girls) aged 13.0-18.5 years participating in the AVENA Study. Both the adolescents' physical activity and that of their relatives and close friends was assessed by questionnaire. The odds of being active were higher in boys than girls (odds ratio?=?2.79, 95% confidence interval?=?2.34-3.33) and tended to decrease across age groups in both boys and girls. Father's and older brother's physical activity was associated with boys' physical activity, while that of any significant other was associated with girls' physical activity. When both parents reported being active, boys had nearly two times higher odds of being active and girls had nearly three times higher odds of being active. The physical activity levels of Spanish adolescents are in line with those previously reported. Physical activity levels in girls are strongly related to the physical activity of any significant other, whereas physical activity levels in boys are only related to their male relatives' physical activity.     

Effect of stance position on kick performance in taekwondo

Abstract

In taekwondo, the stance position can potentially affect kick performance. The aim of this study was to analyse mechanical variables in the roundhouse kick in taekwondo according to three stance positions (0°, 45°, 90°). Nine experienced taekwondo athletes performed consecutive kicking trials in a random order according to these three relative positions of the feet on the ground. Measurements for the mechanical analysis were performed using two 3D force plates and an eight-camera motion capture system. The taekwondo athletes’ reaction and execution times were shorter when starting from the 0° and 45° stance positions than from the 90° position (P < 0.05). Moreover, the ground reaction force was negatively correlated with execution time and positively with velocity of thigh and shank. Our results suggest that the stance position affects the execution technique of taekwondo athletes’ kicks. It is suggested that athletes should not adopt the 90° stance position because it will not enable them to achieve the best performance in the roundhouse kick.     

A survey of selected administrative practices supporting student evaluation of instruction programs

A mail survey of 333 American universities was conducted to assess the current status of Student Evaluation of Instruction. Based on a 68% return, it was concluded that there has been an increase in the popularity of student ratings as a means of evaluating faculty performance, as well as an increase in the frequency with which evaluation results are used in decisions concerning faculty status. However, at most universities, research on the rating instruments does not seem to have kept pace with the decisions that are based on the rating instruments.     

Genetic testing and its implications: human genetics researchers grapple with ethical issues.

To better understand ethical issues involved in the field of human genetics and promote debate within the scientific community, the author surveyed scientists who engage in human genetics research about the pros, cons, and ethical implications of genetic testing. This study contributes systematic data on attitudes of scientific experts. The survey finds respondents are highly supportive of voluntary testing and the right to know one's genetic heritage. The majority consider in utero testing and consequent pregnancy termination acceptable for cases involving likelihood of serious disease but disapprove for genetic reasons they consider arbitrary, leaving a gray area of distinguishing between treatment of disorders and enhancement still to be resolved. While safeguarding patient confidentiality versus protecting at-risk third parties (kin, reproductive partners) presents a dilemma, preserving privacy from misuse by institutional third parties (employers, insurers) garners strong consensus for legislation against discrimination. Finally, a call is made for greater genetic literacy.     

Novice teachers as organisational people: expectations of a professional work environment,collegiality, recognition and respect

This study introduces a model of novice teachers’ expectations together with supporting empirical evidence. The model is sectorial, distinguishing novice teachers’ expectations according to their reciprocal relations with their partners in the school. The study investigated 237 teachers attending internship programmes at five large teachers training colleges in Israel, using a self‐report questionnaire. The findings revealed that: (1) the expectations of novice teachers are based on a sectorial organisational view of the school, as proposed by role theory; (2) novice teachers have very high expectations of their organisational work environment; and (3) their highest expectations are for public recognition of the importance of teaching, while the lowest expectations are for receiving support and backing from the partners in the educational process. The article discusses novice teachers’ views of their function as organisational people and of the school as an arena for developing and nurturing their organisational selves.     

Keystroke Dynamics: Establishing Keyprints to Verify Users in Online Courses

This study examined the potential use of keystroke dynamics to create keyprints (typing fingerprints) to authenticate individuals in online courses. Previous studies have determined that keystroke typing patterns are unique; in addition to replicating these findings, this study explored best practices for implementing keyprint signatures in situations other than simple password or key phrase verification. While authentication can be difficult when attempting to correctly identify individual users, the results of this study indicate that keyprints can reliably indicate negative cases (a typing sample that is likely not the intended student). The results of this study suggest that complete keyprint signatures are better than keyprint profiles (reduced keyprints based on unique typing patterns only). Results also suggest that keyprint signatures are most reliable when a variety of methods are used to obtain keyprint data (i.e., both copy typing and free typing). Small comparison samples increase the challenge of identification but do not prevent the system from identifying negative cases.     

A Surgical View of Anatomy: Perspectives from Students and Instructors

As curricular emphasis on anatomy in undergraduate medical education continues to evolve, new approaches to anatomical education are urgently needed to prepare medical students for residency. A surgical anatomy class was designed for third- and fourth-year medical students to explore important anatomical relationships by performing realistic surgical procedures on anatomical donors. Under the guidance of both surgeons and anatomists, students in this month-long elective course explored key anatomical relationships through performing surgical approaches, with the secondary benefit of practicing basic surgical techniques. Procedures, such as left nephrectomy, first rib resection for thoracic outlet syndrome, and carotid endarterectomy, were adapted from those used clinically by multiple surgical subspecialties. This viewpoint commentary highlights perspectives from students and instructors that suggest the value of a surgical approach to anatomical education for medical students preparing for procedure-oriented residencies, with the goals of: (1) describing the elective at the authors' institution, (2) promoting similar efforts across different institutions, and (3) encouraging future qualitative and quantitative studies of similar pedagogic efforts.     

A NEW KIND OF VOCATIONAL EDUCATION

The following is the partial text of an address delivered to the annual convention of Phi Epsilon Pi Fraternity at the Americana Hotel, Miami Beach, Florida, August 28, 1969.