儿童青少年运动员的营养需要

1. 儿童青少年运动员应该食用多样化的食物，其中，蛋白质应占膳食总能量的12％-15％，碳水化合物至少占55％，而脂肪至多占30％。日常生活中如何吃才能满足这些要求呢？膳食指南宝塔提供了一条可行之道。2.有些营养素对热爱运动的儿童青少年运动员非常重要，要保证摄入充足，这些营养素是碳水化合物（包括纤维素）、维生素B6、维生素D、铁、钙、镁、锌、铬。科学合理、包罗各类食物的平衡膳食，对青少年运动员最大程度地全面摄取各种营养素，满足生长发育和运动训练的需要，是非常必要的。3.鼓励儿童青少年运动员在运动训练前、中、后进行补液，以避免脱水的发生。4.如果膳食合理平衡，就没必要额外补充营养品。     

Why do not more prisoners participate in adult education? An analysis of barriers to education in Norwegian prisons

International Review of Education - From a lifelong learning perspective, education during incarceration is crucial for prisoners’ rehabilitation. This article describes the authors’...     

Optimizing segmental movement in the jumping header in soccer

This study looks at segmental movements in the jumping header from an optimization viewpoint. Investigations on the header so far have focused on head restriction in the movement but have not clarified how and to what extent body segments influence the performance of the skill. In the present study a biomechanical model was used to analyze the jumping header in simulated competition to give a clear picture of an optimized header. Skilled soccer players headed balls at speeds of 13 m x s(-1) the results indicated that the head moves as a free non-restricted segment in the jumping header and should be allowed to do so, even though much soccer literature says otherwise to prevent injuries. The arm movement showed individual characteristics and gave no general advantages in optimizing ball speed after impact in the header The movement of the legs was, on the other hand, the single most important factor in the skill. Therefore, coaches and players shouldfocus on developing muscle strength in the stomach, back and pelvis and should put no restrictions on head and arm movement to optimize the jumping header.     

How do principals make sense of school leadership in Norwegian reorganised leadership teams?

A growing body of research has emphasised the importance of school leadership practice for quality improvement in schools. Yet, little attention has been paid to the investigation of how principals reshape their leadership role and leadership practices when schools reorganise the leadership team with the purpose of increasing the number of formally assigned leaders. As such, this study provides additional insight into how moments of transitions may reshape institutional logics regarding principal leadership practice. Drawing on interviews and contextual observations of five principals in lower secondary schools, framed within a distributed perspective and theory of sense-making, we address this issue by demonstrating that regulative changes influence the normative and cognitive aspects of institutions. We argue that principals re-conceptualise leadership when they move from being solo leaders to sharing leadership, and this allows for subjective interpretations. We have identified two approaches for principal leadership practice which the reorganised leadership team can provide – the exchanging information – and collaborative discussion approaches.     

How to conduct External Quality Assessment Schemes for the pre-analytical phase?

In laboratory medicine, several studies have described the most frequent errors in the different phases of the total testing process, and a large proportion of these errors occur in the pre-analytical phase. Schemes for registration of errors and subsequent feedback to the participants have been conducted for decades concerning the analytical phase by External Quality Assessment (EQA) organizations operating in most countries. The aim of the paper is to present an overview of different types of EQA schemes for the pre-analytical phase, and give examples of some existing schemes. So far, very few EQA organizations have focused on the pre-analytical phase, and most EQA organizations do not offer pre-analytical EQA schemes (EQAS). It is more difficult to perform and standardize pre-analytical EQAS and also, accreditation bodies do not ask the laboratories for results from such schemes. However, some ongoing EQA programs for the pre-analytical phase do exist, and some examples are given in this paper. The methods used can be divided into three different types; collecting information about pre-analytical laboratory procedures, circulating real samples to collect information about interferences that might affect the measurement procedure, or register actual laboratory errors and relate these to quality indicators. These three types have different focus and different challenges regarding implementation, and a combination of the three is probably necessary to be able to detect and monitor the wide range of errors occurring in the pre-analytical phase.     

Conceptions of quality in four different disciplines

Abstract

The paper is based on a book (written by the author and his colleague Markku Lehikoinen) dealing with definitions of quality and views on the applicability of different methods of quality assessment to four different disciplinary fields: physics, biology, sociology and history. The paper focuses on conceptions and definitions of quality voiced by scholars representing the different disciplines. The study involved semi‐structured in depth interviews with 33 experienced scholars. The disciplines under study were chosen to represent diverse disciplinary cultures, with the aim of finding out about the potential impact of (social and cognitive) cultural characteristics of the disciplines on conceptions of quality. The findings show both common views across disciplinary fields and disciplinary differences.     

Critical perspectives on Danish early childhood education and care: between the technical and the political

This paper discusses trends in contemporary Danish early childhood education and care (ECEC). Data are sourced from various policy documents, along with material from ongoing research projects in which the authors are involved. It is claimed that contemporary policy on Danish day care services has a tendency to emphasize narrow curriculum improvements and standardized testing. The democratic dimensions are still relatively strong, but at the moment these dimensions are interpreted within a skills‐and‐testing framework, which is leading to a situation where the political masquerades as the technical.