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1.
r cost and higher performance.Af-ter the emulational practice,we have drawn the conclusion that the system an compensate the weakness of PID control,and it an also prevent  相似文献   

2.
During the late twentieth century, the United Kingdom’s football infrastructure and spectatorship underwent transformation as successive stadia disasters heightened political and public scrutiny of the game and prompted industry change. Central to this process was the government’s formation of an independent charitable organization to oversee subsequent policy implementation and grant-aid provision to clubs for safety, crowd, and spectator requirements. This entity, which began in 1975 focusing on ground improvement, developed into the Football Trust. The Trust was funded directly by the football pools companies who ran popular low-stakes football betting enterprises. Working in association with the Pools Promoters Association (PPA), and demonstrating their social responsibility towards the game’s constituents, the pools resourced a wide array of Trust activities. Yet irrespective of government mandate, the PPA and Trust were continually confronted by political and economic obstacles that threatened the effectiveness of their arrangements. In this paper the history of the Football Trust is investigated, along with its partnership with the PPA, and its relationship with the government within the context of broader political shifts, stadia catastrophes, official inquiries, and commercial threats. It is contended that while the Trust/PPA partnership had a respectable legacy, their history afforded little protection against adverse contemporary conditions.  相似文献   

3.
Abstract

The origin of the retiarius has always been a mystery for experts, since there seems to be no source that gives reliable information about that question. Some experts have proposed that its origin might be found in the Siege of Tyre (332 BC), when the defenders of that city used tridents and nets to repel the attackers. Yet those same experts also warn that that episode might have more to do with the invention of pontarii fighting (a modality of fighting where the retiarius took part) than with the invention of the retiarius itself, which, according to them, would have been invented before pontarii fighting. Here, I propose the idea that an attempt to re-enact the siege of Tyre around the 30s–20s BC in order to offer a new gladiatorial entertainment might have been the origin of pontarii fighting, and of the retiarius too, since in such a re-enactment, a gladiator would have been given a trident and net to play the role of the defenders of Tyre. Thus, pontarii fighting and the retiarius would have been invented at the same time (30s–20s BC), the latter as a consequence of the former.  相似文献   

4.
In this study we investigated if the occurrence of the sticking region was a result of diminishing potentiation (coinciding delayed muscle activation) or the result of a mechanically poor region in which the muscles can produce less force. A regular one-repetition maximum (1RM) free-weight bench press was compared with isometric bench presses performed at 12 different positions. A lower force at the sticking region compared to the other regions in the isometric bench presses would confirm the mechanically-poor-position hypothesis. Twelve resistance-trained males (age 21.7 ± 1.3 years, mass 78 ± 5.8 kg, height 1.81 ± 0.05 m) were tested in 1RM and in isometric contractions in bench press in 12 different positions, indicated by the vertical distance between barbell and sternum, covering the whole range of motion during the concentric phase. Barbell kinematics and muscle activity were registered. In both types of executions a region of lower force output was observed, which supports the mechanically-poor-position hypothesis. Electromyographic activity of four muscles showed the same pattern in the isometric and 1RM attempts. It was concluded that diminishing effect potentiation could not explain the existence of the sticking region.  相似文献   

5.
The aim of the study was to determine whether estimates of the speed–duration relationship are affected using different time-trial (TT) field-based testing protocols, where exhaustive times were located within the generally recommended durations of 2–15?min. Ten triathletes (mean?±?SD age: 31.0?±?5.7?years; height: 1.81?±?0.05?m; body mass: 76.5?±?6.8?kg) performed two randomly assigned field tests to determine critical speed (CS) and the total distance covered above CS (D?). CS and D? were obtained using two different protocols comprising three TT that were interspersed by 60?min passive rest. The TTs were 12, 7, and 3?min in Protocol I and 10, 5, and 2?min in Protocol II. A linear relationship of speed vs. the inverse of time (s?=?D??×?1/t?+?CS) was used to determine parameter estimates. Significant differences were found for CS (p?=?0.026), but not for D? (p?=?0.123). The effect size for CS (d?=?0.305) was considered small, while that for D? was considered moderate (d?=?0.742). CS was significantly correlated between protocols (r?=?0.934; p?D? (r?=?0.053; p?=?0.884). The 95% limits of agreement were ±0.28m?s?1 and ±73.9?m for CS and D?, respectively. These findings demonstrate that the choice of exhaustive times within commonly accepted durations results in different estimates of CS and D?, and thus protocols cannot be used interchangeably. The use of a consistent protocol is therefore recommended, when investigating or monitoring the speed–duration relationship estimates in well-trained athletes.  相似文献   

6.
This historical study will examine the rise of a hegemonic group of sports officials in Israel during the period between 1948 and 1996. The formation of this group is a unique phenomenon of the Israeli sport society. The main argument of the study is that officials of rival sport centres, ‘Hapoel’ and ‘Maccabi’, founded a joint elite group as a side effect of the ‘fifty-fifty’ agreement, signed in 1951. The agreement stated that the Israeli Sport Association, the National Olympic Committee and the Israeli Football Association would be mutually led by officials of both organizations. The members of this elite group, who enjoyed access to economic resources and other benefits, adopted a hedonistic lifestyle, in contrast to the social ethos of Israeli society in the first and second decades of the State. Three events dismantled the group in the middle of the 1990s. The first one was the establishment of the Elite Sport Department in 1984. The second was the establishment of independent Federations by Yadin Machnes. The third was the Maliniak Commission Report. These three events led to the collapse of the Israeli Sport Association in 1996 and to the fall of the Israeli hegemonic group.  相似文献   

7.
We examined psychometric properties of a Modified Physical Activity Questionnaire for Children (MPAQ-C). Thirty-two parents (Study 1), 40 students (6–9 years) and one of each student’s parents (Study 2), and 625 parents (Study 3) completed the MPAQ-C. The MPAQ-C (six items) measured children’s physical activity (PA) after school, and during evenings and weekends for 7 days. Test–retest reliability (Study 1) and convergent validity (Study 2) were measured. Factor validity of the MPAQ-C (Study 3) was examined using confirmatory factor analysis. A single-factor model of the MPAQ-C fit the data well (χ2 (9) = 42.78, p < .001; comparative fit index[CFI] = .977; non-normed fit index [NNFI] = .962; root mean square error of approximation [RMSEA] = .079 [90% confidence interval {CI} = .057 to .11]), with good test–retest reliability, composite reliability (.80) and convergent validity. The factor loadings of MPAQ-C were invariant across fathers/mothers (Δχ2 (6) = 3.44, p > .05). The MPAQ-C is a suitable parent proxy for measuring young Chinese children’s PA.  相似文献   

8.
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9.
On November 6, 1995, Art Modell announced his intention to relocate the National Football League's (NFL) Cleveland Browns to Baltimore following the season. After 4 months of civic activism from Cleveland's community and legal action from the city's politicians, Cleveland, the NFL and Modell agreed to a deal that allowed the long-time owner to honour his contract with Baltimore and simultaneously provided a NFL club to Cleveland to begin play in 1999. This settlement was unique because it allowed Cleveland to retain the naming rights, colours, logo and, most significantly, the history of the Browns. Media presentations of Modell's announcement during the 4-month period illuminated a complex symbiotic relationship between the press, the public and sports entrepreneurs. The local media castigated and vilified Modell for betraying Cleveland's community and disturbing the city's supposed ‘renaissance’, while the national media connected with Cleveland as a leading member of the dilapidated ‘Rustbelt’ in the new American economy. These interconnections led fans, followers and other pundits of the NFL to question the actions of football entrepreneurs and provided a platform at the turn-of-the twenty-first century for sustained criticism of the business of professional sports, franchise relocation and the widening social class divide in the NFL.  相似文献   

10.
This essay describes some of the legendary accomplishments of the Netherlands football team in the World Cup and other international tournaments. It focuses on the Dutch teams led by Johan Cruyff and affectionately known as ‘The Clockwork Orange’ because they introduced a modern style of play with precision passing that was referred to as ‘total football’. The Netherlands advanced to the World Cup final in 1974 and 1978, only to lose the championship each time. The study also explores the role of the Dutch coach Rinus Michels and some of Cruyff’s teammates such as Johan Neeskens and Rob Rensenbrink. Looking at the Netherlands’ performances in the European championships and World Cups in the last three decades, the essay attempts to bring out the transformations in Dutch football in post-Cruyff age. Finally, it discusses the team’s rabid and energized fan base, and the ambush marketing scandal that took place during the 2010 World Cup.  相似文献   

11.
Abstract

We explored sport performers’ cognitive appraisals of organisational stressors. The relevant demands and transactional alternatives that athletes experience in relation to the situational properties were identified. Thirteen national standard swimmers completed semi-structured, interval-contingent daily diaries for a 28-day period. A combination of inductive and deductive content analysis was used to organise and analyse the diary entries with a focus on the following areas: organisational stressors, their underlying situational properties, and the swimmers’ transactional alternatives. One hundred and thirty-one of the organisational stressors were appraised as threat, 41 as challenge, and 83 as harm/loss. Support was found for the majority of Lazarus and Folkman's (1984) situational properties with the only exception being temporal uncertainty. Imminence was associated with the greatest number of threat appraisals (47), novelty was associated with the greatest number of challenge appraisals (17), and duration was associated with the greatest number of harm/loss appraisals (22). It is concluded that appraisal plays a pivotal role in sport performers’ experiences of their organisational environment. Swimmers’ transactional alternatives are influenced by the situational properties of the stressors encountered.  相似文献   

12.
Abstract

The Games of the New Emerging Forces (GANEFO) often serve as an example of the entanglement of sport, Cold War politics and the Non-Aligned Movement in the 1960s. Indonesia as the initiator plays a salient role in the research on this challenge for the International Olympic Committee (IOC). The legacy of GANEFO and Indonesia’s further relationship with the IOC, however, has not yet drawn proper academic attention. This paper analyzes Indonesia’s interactions with the IOC until the present time, with a focus on the country’s involvement in sporting events under the patronage of the IOC (such as the Asian and Southeast Asian Games). In addition, two case studies demonstrate the variable relationship between the two actors. First, Indonesia only narrowly escaped sanctions over a dispute on the use of the Olympic logo in 2015. Yet, the country is named as host of the 2018 Asian Games, hence showing high ambitions to re-enter the international sports arena. These incidents illustrate the significance of conformity of local agencies towards the IOC with regard to political positions and power structures. The study opens the field to local – Asian – perspectives on interactions with the IOC.  相似文献   

13.
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14.
With the help of 29 teachers and students from China Acrobatic Troupe, the Inner Mongolia Acrobatic Troupe was established in April,1958.Over the half century since its establishment, the Inner Mongolia Acrobatic Troupe has experienced ups and downs.As an artistic group,how can we survive and develop when the reform of so-  相似文献   

15.
The article presents the most important results of metabolic (hormonal) study of dosed vibration training (DVT).The author presents vibrating training as an alternative to anabolic steroids on the basis of a comparison of the effectiveness of two types of stimulants - forbidden (doping) and non-medicinal non-invasive, relating to permitted physical means.The study shows that the level of androgens (testosterone),corticosteroids (cortisol), thyroid hormones (thyroxine,triiodothyronine),hormones of adenohypophysis (prolactin) increased under the effect of dosed vibration training.At the same time the level of hormones have no changes under traditional strength training with the use of a synthetic anabolic steroid (retabolil).For the duration of a limited period of time (1 microcycles) dosed vibrotraining causes a more powerful secretion of testosterone than the traditional strength training with the use of anabolic steroids. In this case,the overall time spent on the performance of the DVT training program comprises not more than 15% of the time spent on the traditional training exercises.  相似文献   

16.
Anderson' s works pose a great challenge to critics due to his revolt against the literary tradition and the difficulty of the classification of his works. His language is tainted with obscurity and va...  相似文献   

17.
对第11届全运会女子体操平衡木决赛成套的动作内容、难度价值及动作使用频率等进行统计,研究结果表明：规则的导向作用巨大,D组以上动作是成套可记入难度的主体,技巧动作以及舞蹈动作中高难的跳步动作是中国的优势;但是成套动作类型相对单一、多样化不够,个性不突出。建议提高教练员和运动员的艺术修养,编排中突出运动员风格,力争在转体动作和动作连接上有所创新突破。  相似文献   

18.
In 1874, after tennis had been played indoors for centuries, British officer Walter Wingfield introduced an open-air version of the game, which he called sphairistike or lawn tennis. He developed a lawn-tennis box that was easy to carry and that contained all the necessary equipment for playing. Wingfield's concept was innovative, not only technologically in both game and design, but also socially. He made it clear, for instance, that lawn tennis was also intended for ladies and he fabricated lighter rackets for women. Little is known, however, about the introduction of lawn tennis in the Netherlands. Our study reveals that the strong sales and marketing concept of Wingfield – and his competitors – also facilitated a quick diffusion of the game in the Netherlands. The first places where lawn tennis was played were estates owned by nobility, seaside resorts such as Domburg and Noordwijk, attracting well-to-do ‘Brits’ for recreational purposes, and – interestingly – also farms. Soon, the first ‘one box clubs’ arose as precursors of the formally established clubs. For most upper-class players, tennis was a leisure-time activity, yet the organization of the first national tennis tournament in 1887 shows that some already had lucrative business models in mind.  相似文献   

19.
The Coach–Athlete Relationship Questionnaire was developed to effectively measure affective, cognitive, and behavioral aspects, represented by the interpersonal constructs of closeness, commitment, and complementarity, of the quality of the relationship within the context of sport coaching. The current study sought to determine the internal reliability and factorial validity of the long (the 29-item Long Version Coach–Athlete Relationship Questionnaire) and short (11-item Coach–Athlete Relationship Questionnaire and 13-item Greek Coach–Athlete Relationship Questionnaire) versions of the Coach–Athlete Relationship Questionnaire with a sample of 800 Chinese coaches and athletes. Results supported the internal reliability across all Coach–Athlete Relationship Questionnaire versions examined, while confirmatory factor analyses (CFA) only supported the factorial validity of the three-factor first-order model of the 11-item Coach–Athlete Relationship Questionnaire. The results are discussed in terms of their implications for theory, research, and practice.  相似文献   

20.
Based on the moral problem of Maradona’s goal, known as the ‘Hand of God’, this essay presents a theoretical discussion using the perspective of figurational sociology of how game rules and moral rules are related. It does not aim to solve the moral dispute occasioned by actions like the ‘Hand of God’, but concentrates on a much more limited discussion (appealing to far fewer people) in which we strive to reach a proper sociological understanding. Indeed, we believe that the ‘Hand of God’ is a paradigmatic event for sociological reasoning. This is not to claim that sociology can give any final answers, but to suggest the opposite, namely that an understanding of the value of ‘hand goals’ can be very important for understanding the limits of sociological reason.  相似文献   

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