谈电视摄像自然光的运用

文中详细叙述了在电视摄像中,顺光、顶光、晨昏时间光线的运用。     

In the field with two rural primary school head teachers in England

ABSTRACT

The research focuses on the complexities associated with contemporary rural primary school leadership. The paper draws on in-depth ethnographic research undertaken in two contrasting English rural primary schools and their surrounding community over a period of three years and in particular the experiences and perspectives of the two head teachers from these schools. The paper is conceptually informed by the work of Bourdieu [1984. Distinction: A Social Critique of the Judgement of Taste. London: Routledge and Kegan Paul] and his work around field, habitus and capital as a means of understanding practice. The paper contends that as the neo-liberal economic field increasingly contaminates the field of schooling so a contextual understanding of the complex and shifting social space which a head teacher occupies, including their habitus and the capital they deploy, is of central importance to understanding practice.     

浅谈新时代大学班主任班级管理艺术

学生成长的摇篮就是班级,学生大部分时间都是在学校中度过,因此可以说班级是学生的第二个家.只有将班级建设好了,才能帮助学生更好地成长,进而为社会培育出优秀的人才.大学班级的负责人就是班主任,因此班主任在对班级进行管理时,需要全方面管理学生的思想与作风、学习与健康.文章从新时代大学班主任的工作着手,深入探讨了该时期大学班主任对班级的管理工作.     

Return to play management after concussion in football: recommendations for team physicians

Abstract

A concussion is a rare but potentially serious injury of football players. Thus, an immediate and valid diagnosis, estimate of severity and therapeutic management is required. To summarise the published information on management of concussion with respect to a safe return to play (RTP), a literature search was conducted. Current guidelines on concussion in sports and significant studies on concussion in football were analysed. After concussion, management and RTP decision should remain in the area of clinical judgement on an individualised basis according to the current international guidelines. If a concussion is suspected, the player should not be allowed to RTP the same day. The RTP programme should follow a gradual step-wise procedure. A concussed player should not RTP unless he/she is asymptomatic and the neurological and neuropsychological examinations are normal. Untimely RTP bears an increased risk of sustaining another more severe brain injury and repetitive brain injury of long-term sequelae. In football, the management of concussion should primarily follow the recommendations proposed by the Concussion in Sports Group. Information and education of players and their medical and coaching team help to protect the players’ health. Future studies on concussion should include validated and detailed information on RTP protocols.     

中国人文的机会

中国的人文,就是从爻号发展而来的中国文字符号,把握天、地人变化规律的能力和精神,并付诸实践。由爻号到文字到文章到文学到文化到文明,这是中国人文的重要历史过程。以人为本,这是中国人文的根本和基础;以业为未,这是中国人文的发展和升华;以文为末,这是中国人文的归宿和目的。一般的中国人文素质要求:行万里路,读万卷书,与万人话,省万次思。特殊的中国人文素质要求:独立的人格,三才的秉性;自由的思想,未来的精神。     

激光淬火活塞顶环槽的耐磨性

研究活塞顶环槽激光淬火层的组织、耐磨性和磨损机理．激光淬火的环槽表面具有良好的耐磨性，比经原高频淬火和镀铬工艺处理的环槽的耐磨性有较大的提高．实验运行结果表明，激光淬火是提高活塞使用寿命的有效途径     

Anticipatory postural adjustments during cutting manoeuvres in football and their consequences for knee injury risk

Abstract

Anticipatory postural adjustments (APAs), i.e. preparatory positioning of the head, the trunk and the foot, are essential to initiate cutting manoeuvres during football games. The aim of the present study was to determine how APA strategies during cutting manoeuvres are influenced by a reduction of the time available to prepare the movement.

Thirteen football players performed different cutting tasks, with directions of cutting either known prior to the task or indicated by a light signal occurring 850, 600 or 500 ms before ground contact.

With less time available to prepare the cutting manoeuvre, the head was less orientated towards the cutting direction (P = 0.033) and the trunk was even more rotated in the opposite direction (P = 0.002), while the foot placement was not significantly influenced. Moreover, the induced higher lateral trunk flexion correlated with the increased knee abduction moment (r = 0.41; P = 0.009).

Increasing lateral trunk flexion is the main strategy used to successfully perform a cutting manoeuvre when less time is available to prepare the movement. However, higher lateral trunk flexion was associated with an increased knee abduction moment and therefore an increased knee injury risk. Reducing lateral trunk flexion during cutting manoeuvres should be part of training programs seeking the optimisation of APAs.     

C语言中浮点类型数组赋值问题新解

在C语言编译器TURBO C2.0中,对浮点型数组赋值时会出现错误提示。许多参考资料中给出了相应的解决方法,但都是从应用级的角度来说的,本文从系统级来考虑,提出了问题的解决方法。     

状态反射对标枪最后用力技术的影响

在投掷标枪时头部位置改变所引起的“状态反射”能使人体肌肉张力重新调配 ,促进人体运动幅度增大 ,速度加快 ,使投掷标枪技术得以充分发挥。     

试论男高音训练中的几个重要环节

在声乐教学中 ,我们发现大部分男声是男高音 ,但真正唱得好的男高音却寥寥无几。唱高音一定要有方法和技巧。首先要正确地打开喉咙 ,让声音自然、通畅。歌唱时气息支持 ,除用横隔膜力量向下推压向外扩以外 ,后背的肌肉力量对高音的支持也同样重要。更多地运用共鸣 ,细心唱好“过渡”音是高音的必由之路。头腔共鸣是男高音的重要共鸣腔体。为了保持高音的灵活性 ,每天要练习各种音阶