Biomechanics of coaching maximal instep soccer kick for practitioners

Kicking in soccer has been the subject of scientific research for more than 40 years yet review articles summarizing the biomechanical fundamentals of kick optimization as a guide to coaching are scarcely to be found. The current review article aims to bridge the gap between scientific research into the maximal instep kick (including studies employing 3D motion capture and full-body biomechanical modelling) and the application of such research in coaching. It does so by supplying a scientifically founded, coaching-friendly article explaining identifiable characteristics and motor control sequencing that define this skill. Relevant biomechanical factors are identified in a way that should help coaches better develop training programmes and, at the same time, foster better understanding of the skill among athletes. Such information will contribute to both accelerated skill acquisition and, by concomitant gains in skill efficiency, the development of programmes that minimize risk of injury to athletes during training.     

Modern humans in Sarawak,Malaysian Borneo,during Oxygen Isotope Stage 3: palaeoenvironmental evidence from the Great Cave of Niah

During recent reinvestigations in the Great Cave of Niah in Borneo, the ‘Hell Trench’ sedimentary sequence seen by earlier excavators was re-exposed. Early excavations here yielded the earliest anatomically-modern human remains in island Southeast Asia. Calibrated radiocarbon dates, pollen, algal microfossils, palynofacies, granulometry and geochemistry of the ‘Hell Trench’ sequence provide information about environmental and vegetational changes, elements of geomorphic history and information about human activity. The ‘Hell’ sediments were laid down episodically in an ephemeral stream or pool. The pollen suggests cyclically changing vegetation with forest habitats alternating with more open environments; indicating that phases with both temperatures and precipitation reduced compared with the present. These events can be correlated with global climate change sequences to produce a provisional dating framework. During some forest phases, high counts of Justicia, a plant which today colonises recently burnt forest areas, point to fire in the landscape. This may be evidence for biomass burning by humans, presumably to maintain forest-edge habitats. There is evidence from palynofacies for fire on the cave floor in the ‘Hell’ area. Since the area sampled is beyond the limit of plant growth, this is evidence for human activity. The first such evidence is during an episode with significant grassland indicators, suggesting that people may have reached the site during a climatic phase characterised by relatively open habitats ∼50 ka. Thereafter, people were able to maintain a relatively consistent presence at Niah. The human use of the ‘Hell’ area seems to have intensified through time, probably because changes in the local hydrological regime made the area dryer and more suitable for human use.     

历史上永定河筑堤的环境效应初探

金、元以后永定河水害急剧增多,由北京的母亲河变成了常常威胁京城安全的害河。金代以来各朝都十分重视对永定河的治理,元明清三朝更是把修筑永定河的堤防作为京畿事务中的重大问题。历史上永定河的大规模筑堤为京城减少了洪水之虞,但同时也带来了包括北京水环境在内的一系列地理环境的变化。本文追溯永定河筑堤后北京地区水环境变迁以及下游地貌改变的重要史实,阐述筑堤工程对于流域整体环境的深远影响,以期引起人们对历史上一些重大水利工程的环境效应的反思。     

二十世纪二三十年代“上海模式”对重庆的冲击

民国重庆城市现代化起步于刘湘“军人干政”时期。而川江航运的繁荣,城市精英的觉醒以及刘湘政权的若干举措,为“上海模式”输入重庆提供了重要条件。作为后发外生型条约体系城市,重庆的现代化不仅依靠西方现代性要素的刺激,而且更直接地受到“上海模式”的辐射和拉动。“军人干政”的负面效应致使以“上海模式”为蓝本的重庆城市现代化呈现畸变态势。在“上海模式”的冲击下,在本社会还缺少现代性因素积累的情况下,重庆城市现代化于20年代末期启动。     

Towards Culture 3.0 – performative space in the public library

The aim of this article is to analyse and discuss the development of performative spaces in public libraries from a cultural policy perspective. First, a framework of three concepts of culture, 1.0–3.0, is used as a tool to analyse the overall development of public libraries. Against this background, we introduce the notion of performative spaces in public libraries by highlighting Nordic examples. The tendency can also be seen on a broader level in European and North American libraries, where a ‘performative turn’ can be seen as the relationship between the library and its users, especially the younger ‘digital natives’. The rationales behind the emergence of performative spaces in public libraries are analysed and discussed: democratisation, empowerment and economic impact. This article concludes that the performative spaces are legitimized by multiple rationales in the same way as cultural policies and cultural institutions are legitimised today.     

Cultural impact of modernization and tourism on Dai villages in Xishuangbanna,China

The development of tourism can have a considerable sociocultural impact on ethnic communities, but few studies have attempted to separate the unique impact of ethnic tourism from the overall impact of modernization and describe its mechanism clearly. This paper describes a quasi-natural experiment performed in three typical Dai villages in different stages of tourism development. A crosswise and longitudinal comparative study was performed on Dai village culture. The study indicates the following: (1) spiritual culture has been transmitted relatively unchanged across generations in three Dai villages, but material culture has undergone various degrees of change. (2) The changes in material culture and some parts of institutional culture have been caused primarily by the pressure of overall social modernization. (3) Currently, the overall thrust of modernization in mainstream Chinese society has driven some ethnic cultural practices out of use, while the endogenous driving force of tourism development in ethnic communities has pulled them back into use. (4) Under the influence of modernization, the issue of whether ethnic tourism communities can be developed in a sustainable way depends on both bottom-up and top-down factors: the leading role played by community elites internally, developing useful parts of ethnic culture and discarding useless parts during repeated games in the tourism field, and government policy and guidance facilitating planning.     

Towards Robust Development of Retail Planning Policy: Maintaining the Viability and Vitality of Main Street Shopping Precincts

The deregulation of shopping hours has created a fluid environment where time-poor, affluent and mobile households can access shopping opportunities away from traditional retail precincts. The consequence has been the substantial decline of the viability and vitality of many main streets in eastern Australia. This greater temporal fluidity, however, requires stronger land use regulations if traditional town or suburb main streets are to maintain economic viability and social vitality. A suite of simple definitions of retail form are suggested and a number of assessment guidelines are proposed as meeting the requirements for more robust retail development assessment, including considerations of the geography of localities, place and the built form environment.     

Hydrothermal activity associated with the Ries impact event, Germany

Combined field studies, optical and scanning electron microscopy, and electron microprobe studies of impactites from the Ries impact structure, Germany, have allowed a clearer picture of the hydrothermal system associated with the Ries impact event to be made. Hydrothermal alteration is concentrated within impact‐generated suevites in the interior of the crater (crater suevites) and around the periphery (surficial suevites), with minor alteration in the overlying sedimentary crater‐fill deposits. The major heat source for the Ries hydrothermal system was the suevite units themselves. Hydrothermal alteration of crater‐fill suevites is pervasive in nature and comprises several distinct alteration phases that vary with depth. An early phase of K‐metasomatism accompanied by minor albitization of crystalline basement clasts and minor chloritization, was followed by pervasive intermediate argillic alteration (predominantly montmorillonite, saponite, and illite) and zeolitization (predominantly analcite, erionite, and clinoptilolite). Hydrothermal fluids were typically weakly alkaline during the main stage of alteration. In contrast to the crater‐fill suevites, alteration within surficial suevites was typically restricted to montmorillonite and phillipsite deposition within cavities and fractures. The pervasive nature of the alteration within the crater‐fill suevites was likely due to the presence of an overlying crater lake; whereas alteration within surficial suevites typically occurred under undersaturated conditions with the main source of water being from precipitation. There are exceptional outcrops of more pervasively altered surficial suevites, which can be explained as locations where water pooled for longer periods of time. Hydrothermal fluids were likely a combination of meteoric waters that percolated down from the overlying crater lake and groundwaters that flowed in from the surrounding country rocks.     

大型活动的形象影响研究—以′99昆明世博会为例

从旅游影响的角度出发,大型活动将对举办地形成一定的形象影响。本文以'99昆明世博会为例,使用问卷调查数据,从四个方面研究了'99世博会的形象影响问题。研究表明:'99世博会所带来的形象效应并未成为游客选择昆明作为出游目的地的首要决定因素,目的地区域的传统特色(如气候、环境及文化因素),仍然是游客作出决策的主导因素;'99世博会对举办城市昆明而言,所带来的积极影响超过了负面影响,可以有效提高举办地的知名度;大型活动长期的、潜在的形象影响可以通过了解游客的重游意愿和口碑效应来衡量,世博会的举办所带来的潜在长期影响是正面的;有助于形成较高的形象认同度。     

国际金融危机影响及中国旅游饭店的经营策略

如何在正确认识国际金融危机对世界经济、世界旅游市场、我国经济、我国旅游市场和我国旅游饭店影响基础上,借鉴国际旅馆的经营策略,说明我国饭店的经营策略,这是当前我国旅游业发展的一个重要课题。本文据此命题,运用统计数据与典型样本分析,讨论阐明下列问题：（1）世界经济发展的主要趋势;（2）世界旅游市场发展的主要趋势;（3）国外旅馆的经营策略;（4）中国经济发展的主要趋势;（5）中国旅游市场发展的主要趋势;（6）中国旅游饭店的经营策略。