A state space approach to elasticity     

Leon Y. Bahar 《Journal of The Franklin Institute》1975,299(1):33-41

The two-dimensional, plane stress problem of linear elasticity is analyzed within a state space framework. The medium considered is homogeneous and isotropic. Vlasov's mixed formulation of elasticity is used throughout. The field equations are derived in closed form, thus avoiding Vlasov's intermediate infinite series solution. Finally, all the properties of the transfer matrix are shown to follow directly from embedding the problem into a state space setting.  相似文献   

Analysis of named entity recognition and linking for tweets     

Leon Derczynski  Diana Maynard  Giuseppe Rizzo  Marieke van Erp  Genevieve Gorrell  Raphaël Troncy  Johann Petrak  Kalina Bontcheva 《Information processing & management》2015

Applying natural language processing for mining and intelligent information access to tweets (a form of microblog) is a challenging, emerging research area. Unlike carefully authored news text and other longer content, tweets pose a number of new challenges, due to their short, noisy, context-dependent, and dynamic nature. Information extraction from tweets is typically performed in a pipeline, comprising consecutive stages of language identification, tokenisation, part-of-speech tagging, named entity recognition and entity disambiguation (e.g. with respect to DBpedia). In this work, we describe a new Twitter entity disambiguation dataset, and conduct an empirical analysis of named entity recognition and disambiguation, investigating how robust a number of state-of-the-art systems are on such noisy texts, what the main sources of error are, and which problems should be further investigated to improve the state of the art.  相似文献   

An improvement index to quantify the evolution of performance in field events     

Steve Haake  David James  Leon Foster 《Journal of sports sciences》2015,33(3):255-267

The mean of the top 25 performances in 8 men’s and 5 women’s field events since the 1890s showed that performances increased dramatically after the Second World War II and subsequently plateaued during the late twentieth century. A performance improvement index, developed on the basis of work done, was set to 100% in 1948. The underlying rise found in all events was modelled using an exponential function with a superposition of steps and linear changes to account for the introduction of rule changes, drugs testing and the introduction of new technologies. The performance improvement index in throwing events increased to 140.9% compared with 125.8% in jumping events, and women’s performance improvement always exceeded that of men’s. Around half of all events were shown to have reached 99.9% of their predicted limit with a majority reaching it within the next 25 years. It was concluded that performance will only change in the future if an intervention takes place: this could be the emergence of a new technology, a rule change or a new athlete population.  相似文献   

A statewide writing assessment model: Student proficiency and future implications     

Leon  Jody  Sue 《Assessing Writing》2008,13(1):45-60

This paper is an examination of statewide district writing achievement gain data from the Nebraska Statewide Writing Assessment system and implications for statewide assessment writing models. The writing assessment program is used to gain compliance with the United States No Child Left Behind Law (NCLB), a federal effort to influence school district assessment and accountability. While the research literature is mixed with some viewing statewide writing assessment as narrowing writing curriculum and “standardizing” writing, others point out that it facilitates sharing between teachers to improve writing and teachers are empowered by their participation in the process.Nebraska's Statewide Writing Assessment, based on the six-trait model, has strong support from teachers regarding their perception of the assessment in supporting teaching practices and student success. Examination of achievement gain data revealed gains in 4th, 8th, and 11th grades in the average number of students rated proficient from one administration of the assessment to the next.Implications for educational practice, recommendations for future research, and relevant related issues (NCLB concerns and measurement issues) are discussed.  相似文献   

Purism and the category of ‘the aesthetic’: the drama argument     

Leon Culbertson 《体育哲学杂志》2017,44(1):1-14

This paper examines one component of Stephen Mumford’s case for the claim that we should regard sport, art and the aesthetic as more closely connected than has tended to be the case, under the influence of the work of David Best, in recent years. Mumford’s rejection of what I call ‘the drama argument’ is examined in detail and it is argued that all but one element of his case fails to do the job he envisages.  相似文献   

Introduction to work design issue     

Stephanie Jackson  Leon Ombrello 《Performance Improvement》1979,18(5):3-4

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A comparative study of diagnostic potential and efficiency of six scoring systems applied to children's figure drawings     

Leon P. Hall  M. Laverne Ladriere 《Psychology in the schools》1970,7(3):244-247

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Student perceptions of effective lecturers: the need to recognise the role of ethnicity and choice of discipline     

Farzad Radmehr  Hon Luamanuvao Winnie Laban  John Overton  Leon Bakker 《高等教育研究与发展》2020,39(2):302-317

ABSTRACT

University student perceptions of effective teaching have been explored in previous studies, however, research is lacking regarding how perceptions of teaching efficacy vary by ethnicity and programme of study. In this study, student perceptions of effective teaching are explored between STEM (Science, Technology, Engineering, and Mathematics) and non-STEM major students of four ethnic groups: Europeans, Asians, Māori, and Pasifika. The study sample comprised 2073 students from a New Zealand university who completed a survey in 2016. Firstly, the findings indicated that non-STEM major students were more likely to report culturally knowledgeable as an important characteristic compared to STEM major students. Secondly, the distribution referring to content knowledgeable, creative, culturally knowledgeable, and passionate as characteristics of effective teaching was different between the four ethnic groups. In detail, Europeans and Māori were more likely to refer to content knowledgeable than Pasifika students, while Pasifika students were more likely to refer to culturally knowledgeable compared to Europeans. Furthermore, the highest percentage of referring to creative as a characteristic of effective teaching was for Asians, and the highest percentage of referring to passionate was for Māori students. The findings imply that lecturers should be well informed about these differences to be able to improve the quality of their teaching and student learning.  相似文献   

A Newark High School Tests Two Approaches to Poetry     

Alexander Lewis  Henry M. Goldstein  Leon Mones 《Clearing house (Menasha, Wis.)》2013,86(4):241-243

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THE REAL MISSION OF THE BUREAU     

Dr. Leon Wiessberg 《Journal of Jewish Education》2013,79(3-4):50-52

Education is a profession. It is unique in that most people believe they have a handle on what education should be. Education is the only profession for whom the service recipient believes himself to be as knowledgeable as the service provider. In Jewish education, this may be compounded to the extent that parents of the service recipient remember a negative experience in Hebrew school.  相似文献