Searching for momentum in NBA triplets of free throws     

Elia Morgulev  Ofer H. Azar  Michael Bar-Eli 《Journal of sports sciences》2020,38(4):390-398

ABSTRACT

The literature on momentum is still undecided, with mixed results whether momentum exists or is only perceived to exist (“hot hand fallacy”). We explore whether momentum exists by looking at cases in which a basketball player has three consecutive free throws. A free throw is a well-defined task executed in a stable environment, allegedly giving momentum optimal chances to occur. Taking 14 NBA seasons we collected over 4500 three-free-throw sets (triplets). We obtained the outcomes of the shots as well as some additional variables about the player and the game: the player’s average free-throw percentage, home or away, and the game score and the quarter when the free throws were attempted. We first analyse the hit rates in the three shots and then proceed to regression analysis that also controls for the abovementioned variables. We address several concerns raised in the literature. All comparisons and analyses yield the same conclusion that there is no evidence for momentum in the data.  相似文献   

Analysis of single comments left for bioRxiv preprints till September 2019     

Mario Mali ki  Joseph Costello  Juan Pablo Alperin  Lauren A. Maggio 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2021,31(2)

IntroductionWhile early commenting on studies is seen as one of the advantages of preprints, the type of such comments, and the people who post them, have not been systematically explored.Materials and methodsWe analysed comments posted between 21 May 2015 and 9 September 2019 for 1983 bioRxiv preprints that received only one comment on the bioRxiv website. The comment types were classified by three coders independently, with all differences resolved by consensus.ResultsOur analysis showed that 69% of comments were posted by non-authors (N = 1366), and 31% by the preprints’ authors themselves (N = 617). Twelve percent of non-author comments (N = 168) were full review reports traditionally found during journal review, while the rest most commonly contained praises (N = 577, 42%), suggestions (N = 399, 29%), or criticisms (N = 226, 17%). Authors’ comments most commonly contained publication status updates (N = 354, 57%), additional study information (N = 158, 26%), or solicited feedback for the preprints (N = 65, 11%).ConclusionsOur results indicate that comments posted for bioRxiv preprints may have potential benefits for both the public and the scholarly community. Further research is needed to measure the direct impact of these comments on comments made by journal peer reviewers, subsequent preprint versions or journal publications.  相似文献   

Exploring the Fluctuations of Foreign Language Enjoyment in Conversation: An Idiodynamic Perspective     

Majid Elahi Shirvan  Nahid Talebzadeh 《Journal of Intercultural Communication Research》2018,47(1):21-37

The main focus of this study was to discern the effect of different topics on the dynamics of one of the main variables of positive psychology, foreign language enjoyment (FLE). To do this, we used an idiodynamic method to explore the rapid moment-to-moment changes of FLE. Seven female university students engaged in a conversation involving both simple and difficult topics, and self-rated their moments of experiencing enjoyment during the conversation process. The results indicate that the dynamicity of enjoyment emerges not only within individuals, but also across individuals intra-personally under the influence of conversational topics. Furthermore, the idiodynamic method provided us with the opportunity to examine the underlying factors of the dynamic fluctuations of FLE and gain a deeper insight into FLE as a dynamic system.  相似文献   

两年制硕士研究生科研论文能力的探讨   总被引：7，自引：0，他引：7  

李庆华 《科技与管理》2006,8(3):149-151

针对两年制硕士研究生科研论文能力的培养,根据科研论文工作时间较短的特点,提出了从论文选题突出研究生科研能力培养,为研究生提供良好的论文工作科研环境,保证研究生有充足的时间投入论文科研工作等3方面加强培养研究生科研能力的建议。  相似文献   

网络话题传播规律建模与预测问题研究     

夏一雪 《现代情报》2019,39(4):3-12

[目的/意义]构建数学模型研究网络话题传播规律建模和预测问题，为深入研究网络话题传播规律提供理论参考。[方法/过程]定性分析网络话题传播的大数据特征、可量化性、可度量周期性、可预测性等特征，通过分析网络话题传播机理，构建网络话题传播规律的常态模型和衍生模型，提出划分网络话题传播阶段的一般方法，并据此研究网络话题传播趋势预测方法。[结论/结果]通过"雾霾"微博话题数据开展实证分析，能够较好地划分传播阶段并预测传播趋势，由此，根据本文构建的数学模型研究网络话题传播规律是可行的。  相似文献   

Influence of Different Surface Treatments of H13 Hot Work Die Steel on Its Thermal Fatigue Behaviors   总被引：1，自引：0，他引：1  

MINYong－an  WUXiao－chun 《上海大学学报(英文版)》2001,5(4):326-330

Thermal fatigue checking is general failure of hot work die steels,which is relative with the structures and properties of the steels and the stress alternated during the employment.The Uddeholm test method on thermal fatigue is used to compare the behaviors of different samples,which are treated with plasma nitriding 、plasma sulfur-carbon-nitriding、boronizing or not treated.The results show that the nitriding improves the thermal fatigue property of the tool steel,while the plasma sulfur-carbon-nitriding and the boronizing impair the property.The mechanisms are induced as follows .By increasing the hardness and changing the stress distribution in the surface layer,surface treatment can decrease the plastic deformation and the temsile stress during the cycling.Therefore,the generation and growth of the cracks are restrained.On the other hand,as results of surface treating,in the surface layer the toughness declines and the expanding coefficient ascendes;the latter change caused the strengthening of the tensile and compressive stress during the cycling.Thus the resistance to thermal fatigue is weakened.Whether or not the surface treatment is favor to thermal fatigue of tool steels relies on which factor is dominant.  相似文献   

《雷雨》中的"第九个角色"     

江善敏 《齐齐哈尔师范高等专科学校学报》2007,(1):68-69

作为中国话剧艺术第一座丰碑的《雷雨》，在不同时期，人们对《雷雨》给予了不同的理解和再创作。通过曹禺的阐述，可看出被作者称为剧中的第九个角色——“雷雨”才是真正的主角。自然现象的雷雨和雷雨的象征意义构成其完整的统一体。由此，表现了作者对人的生存困境的关注、对人性的洞察。  相似文献   

开发网络信息资源　建设特色虚拟馆藏   总被引：1，自引：0，他引：1       下载免费PDF全文

杨勇 《惠州学院学报》2001,21(1):102-105

本文从开发和利用网络信息资源的目的出发, 论述了虚拟馆藏建设之意义与原则, 并对虚拟馆藏数据库建设实施的相关问题, 包括建库的前期准备工作、专题信息资源的搜集与组织及其更新与维护等, 进行了探讨。  相似文献   

钢的热轧变形     

邵峰 《合肥联合大学学报》2002,12(2):102-107

轧制理论中对钢在热轧状态下变形情形的研究，通常是在一定的理论条件下进行的。本从热加工实际出发。对影响钢的热轧变形的一些因素加以探讨。  相似文献   

汉语保留宾语结构的句法生成机制   总被引：7，自引：0，他引：7  

潘海华  韩景泉 《中国语文》2008,(6)

本文对汉语保留宾语结构(如张三死了父亲及张三被杀了父亲)的句法生成机制提出解释。根据本文的分析,动词之前的非论元名词组不再是句子的主语,而是在标句词组(CP)的指示语位置上基础生成的话题。动词后的客体论元名词组并不处在它的基础生成位置上。该论元名词组在动词之后的逻辑宾语位置上基础生成,因为受到格因素的驱动,移位到TP的指示语位置接受主格特征核查。然后该名词组经过右向外置移位嫁接到了TP上。右向外置受语用因素作用,其结果生成一个句末焦点。本分析模式不仅具有经验和理论优势,而且可以为其他一些相关的棘手结构提供合理解释。  相似文献