Families with children conceived by donor insemination: a follow-up at age twelve

Growing public awareness of the use of donor insemination (DI) to enable infertile couples to become parents has been accompanied by increasing concern regarding the potentially negative consequences for family relationships and child development. Findings are presented from a prospective study of the quality of parenting and psychological adjustment of DI children at age 12. Thirty-seven DI families, 49 adoptive families, and 91 families with a naturally conceived child were compared on standardized interview and questionnaire measures administered to mothers, fathers, children, and teachers. The differences between DI families and the other family types reflected greater expressive warmth of DI mothers toward their children and less involvement in the discipline of their children by DI fathers. The DI children were well adjusted in terms of their social and emotional development. The findings are discussed with respect to the secrecy surrounding DI and the imbalance in genetic relatedness between the parents and the child.     

We are not alone: A sample of international policy challenges and issues

Abstract

International trade in information technology involves political, economic, and military factors that are highly interrelated, making U.S. policy formulation a complex process which requires extensive data on foreign and domestic policies and technological capabilities. An analysis of U.S. policy for controlling the reexport of high‐technology goods provides an example of this interdependence. Four primary points are emphasized throughout the paper: (1) there seems to be only limited appreciation of how different issues get entangled in the international arena; (2) the data on which to base policy decisions regarding information technology do not exist in a readily available and usable form; (3) there is little understanding of the technological status and policy support for information technology in other countries; and (4) the people needed to analyze international developments and policies in the information technologies are not being trained.     

Energy system contribution to 400-metre and 800-metre track running

As a wide range of values has been reported for the relative energetics of 400-m and 800-m track running events, this study aimed to quantify the respective aerobic and anaerobic energy contributions to these events during track running. Sixteen trained 400-m (11 males, 5 females) and 11 trained 800-m (9 males, 2 females) athletes participated in this study. The participants performed (on separate days) a laboratory graded exercsie test and multiple race time-trials. The relative energy system contribution was calculated by multiple methods based upon measures of race [Vdot]O₂, accumulated oxygen deficit (AOD), blood lactate and estimated phosphocreatine degradation (lactate/PCr). The aerobic/anaerobic energy system contribution (AOD method) to the 400-m event was calculated as 41/59% (male) and 45/55% (female). For the 800-m event, an increased aerobic involvement was noted with a 60/40% (male) and 70/30% (female) respective contribution. Significant (P <?0.05) negative correlations were noted between race performance and anaerobic energy system involvement (lactate/PCr) for the male 800-m and female 400-m events (r = ? 0.77 and ??0.87 respectively). These track running data compare well with previous estimates of the relative energy system contributions to the 400-m and 800-m events. Additionally, the relative importance and speed of interaction of the respective metabolic pathways has implications to training for these events.     

Energy system contribution to 1500- and 3000-metre track running

The aim of the present study was to quantify the contributions of the aerobic and anaerobic energy systems to 1500- and 3000-m track running events during all-out time-trials performed individually on a synthetic athletic track. Ten 3000-m (8 males, 2 females) and fourteen 1500-m (10 males, 4 females) trained track athletes volunteered to participate in the study. The athletes performed a graded exercise test in the laboratory and two time-trials over 1500 or 3000?m. The contributions of the energy systems were calculated by measures of race oxygen uptake, accumulated oxygen deficit (AOD), race blood lactate concentration, estimated phosphocreatine degradation and some individual muscle metabolite data. The relative aerobic energy system contribution (based on AOD measures) for the 3000?m was 86% (male) and 94% (female), while for the 1500?m it was 77% (male) and 86% (female). Estimates of anaerobic energy expenditure based on blood lactate concentrations, while not significantly different (P?>?0.05), were generally lower compared with the AOD measures. In conclusion, the results of the present study conform with some recent laboratory-based measures of energy system contributions to these events.     

Classroom management: A model for the identification,development, and assessment of competencies

This article looks across effective collaborations involving schools and colleges of education and other organizations to identify most commonly voiced reasons for collaboration and factors perceived as being most important to collaboration. Partnerships are often founded as means for a school or college of education to better fulfill its own mission through working with other departments on campus, community organizations, and schools. Those involved with effective collaboration report that willingness to listen, mutual respect, long-term commitment, frequent communication, flexibility, and careful selection of partners were key factors in the success of their collaboratives.     

Traversing the Challenges of Conducting Research with Young, Immigrant Children: The Case of Korean Children

Based on a qualitative study on young Korean immigrant children’s interpretation of American popular culture, this paper reflects on the researchers’ role by examining the research challenges faced. Prior to discussing the research obstacles in conducting the study, we begin with briefly describing its methodology and design. Next, we discuss the various obstacles we encountered when conducting our study and howwe attempted to overcome these dilemmas by discussing two major struggles during the research process: a) the relationships between the researchers and our young participants, and b) the cultural sensitivity that was needed in initially gaining permission from and working with the parents of our informants. It then illuminates how the researchers attempted to cope with such difficulties by rethinking a researchers’s role emphasizing the importance of cultural context in research. Finally, the paper provides some discussions and implications based on our research experiences.     

Effects of rest interval during high-repetition resistance training on strength,aerobic fitness,and repeated-sprint ability

Abstract

The effect of altering the rest period on adaptations to high-repetition resistance training is not well known. Eighteen active females were matched according to leg strength and repeated-sprint ability and randomly allocated to one of two groups. One group performed resistance training with 20-s rest intervals between sets, while the other group employed 80-s rest intervals between sets. Both groups performed the same total training volume and load. Each group trained 3 days a week for 5 weeks [15- to 20-repetition maximum (RM), 2 – 5 sets]. Repeated-sprint ability (5×6-s maximal cycle sprints), 3-RM leg press strength, and anthropometry were determined before and after each training programme. There was a greater improvement in repeated-sprint ability after training with 20-s rest intervals (12.5%) than after training with 80-s rest intervals (5.4%) (P = 0.030). In contrast, there were greater improvements in strength after training with 80-s rest intervals (45.9%) than after training with 20-s rest intervals (19.6%) (P = 0.010). There were no changes in anthropometry for either group following training. These results suggest that when training volume and load are matched, despite a smaller increase in strength, 5 weeks of training with short rest periods results in greater improvements in repeated-sprint ability than the same training with long rest periods.