Retrieving and classifying instances of source code plagiarism     

Debasis?GangulyEmail authorView author&#;s OrcID profile  Gareth?J.?F.?Jones  Aarón?Ramírez-de-la-Cruz  Gabriela?Ramírez-de-la-Rosa  Esaú?Villatoro-Tello 《Information Retrieval》2018,21(1):1-23

Automatic detection of source code plagiarism is an important research field for both the commercial software industry and within the research community. Existing methods of plagiarism detection primarily involve exhaustive pairwise document comparison, which does not scale well for large software collections. To achieve scalability, we approach the problem from an information retrieval (IR) perspective. We retrieve a ranked list of candidate documents in response to a pseudo-query representation constructed from each source code document in the collection. The challenge in source code document retrieval is that the standard bag-of-words (BoW) representation model for such documents is likely to result in many false positives being retrieved, because of the use of identical programming language specific constructs and keywords. To address this problem, we make use of an abstract syntax tree (AST) representation of the source code documents. While the IR approach is efficient, it is essentially unsupervised in nature. To further improve its effectiveness, we apply a supervised classifier (pre-trained with features extracted from sample plagiarized source code pairs) on the top ranked retrieved documents. We report experiments on the SOCO-2014 dataset comprising 12K Java source files with almost 1M lines of code. Our experiments confirm that the AST based approach produces significantly better retrieval effectiveness than a standard BoW representation, i.e., the AST based approach is able to identify a higher number of plagiarized source code documents at top ranks in response to a query source code document. The supervised classifier, trained on features extracted from sample plagiarized source code pairs, is shown to effectively filter and thus further improve the ranked list of retrieved candidate plagiarized documents.  相似文献   

Picture it in your mind: generating high level visual representations from textual descriptions     

Fabio?Carrara  Andrea?EsuliEmail authorView author&#;s OrcID profile  Tiziano?Fagni  Fabrizio?Falchi  Alejandro?Moreo Fernández 《Information Retrieval》2018,21(2-3):208-229

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Fans and states at work: a Ghanaian fan trip to the FIFA World Cup 2010 in South Africa     

Erdmute Alber & Christian Ungruhe 《Soccer & Society》2016,17(1):18-39

The FIFA World Cup for men (hereafter referred to as the FIFA World Cup) is possibly the biggest global media event. Winning or losing often gives rise to expressions of collective degrees of national pride or disappointment. But, it is not only the performance of the teams that is of significance in this respect; the devotion of fans to the game and their loyalty to their own national team are also an important vehicle of identity and self-affirmation as a nation. Thus, no country can afford to dispense with the travelling model of the enthusiastic fan as a representative of national identity. Through an ethnographic study of Ghana’s state-financed fan trip to the FIFA World Cup 2010 in South Africa, we will show how the actors involved (government, opposition, fans and media) negotiate national identity and representation.  相似文献   

The Anatomy of Violence: The Biological Roots of Crime     

Ian Silver & Joseph L. Nedelec 《Journal of Criminal Justice Education》2019,30(1):159-161

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Student,home, and school socio-demographic factors: links to school,home, and community arts participation     

Marianne?Mansour  Andrew?J.?MartinEmail authorView author&#;s OrcID profile  Michael?Anderson  Robyn?Gibson  Gregory?Arief?D.?Liem  David?Sudmalis 《The Australian Educational Researcher》2016,43(2):221-244

This study explored the role of student (e.g., age, language background, gender), home (e.g., parent/caregiver education), and school (e.g., school type, size) socio-demographic factors in students’ school (e.g., in-school arts tuition, arts engagement), home (e.g., parent/caregiver–child arts interaction), and community (e.g., arts attendance, arts tuition) arts participation. The sample comprised 1172 elementary and secondary school students from 15 schools. Findings revealed that student and home socio-demographic factors were the most salient in predicting arts participation across school, home, and community contexts. Age, gender, and prior achievement were the key student socio-demographic factors, while parent/caregiver education and occupation were also associated with students’ arts participation. Implications for practice and intervention pertinent to young people’s arts participation are discussed.  相似文献   

The effects of electronic portfolio tools on online students' perceived support and cognitive load   总被引：1，自引：0，他引：1  

Craig E. Shepherd  Doris U. Bolliger 《The Internet and Higher Education》2011,14(3):142-149

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汉康液的抗氧化作用及对SOD活力的影响     

罗学娅  华宗祥 《大连大学学报》1995,(3)

小鼠给予汉康液2.0g/kg/日,连续灌胃22天,结果表明该液能明显降低小鼠血清中丙二醛(MDA)含量,并对血清超氧化物歧化酶(SOD)活性有显著增强作用。  相似文献   

Out of the Frying Pan into the Fire?     

Martin Shepherd 《Cambridge Journal of Education》1993,23(3):263-271

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A Comparative Sociology of School Knowledge     

John Shepherd  Graham Vulliamy 《British Journal of Sociology of Education》1983,4(1):3-18

Despite a recently renewed theoretical interest in both North America and in Britain in the sociology of school knowledge, we still have little, if any, comparative empirical material from these two continents. This paper reports the findings of a sociological study, designed to replicate the previous English empirical work by Vulliamy, into music teaching in Ontario high schools. Unlike in England, no overt culture clash was found in Ontario schools between ‘school’ music and ‘students’ ‘ music, both because of the wider scope of ‘what counts as school music’ in Canada and because music is not a compulsory school subject there. However, by focusing upon the deep structure of the pedagogical process, as opposed to surface features of classroom interaction, it is argued that particular ideologies of the dominant musical culture are transmitted in very similar ways in both contexts. What is shared is a conception of music as equatable with musical notation. The ideological significance of this is pinpointed in an analysis of the structurally homological relationship between different musical languages and the social/‐cultural contexts of their creation. The processes of school music teaching not only contribute to the legitimation of a dominant musical ideology, but also to much more pervasive ideological assumptions underpinning capitalist societies.  相似文献   

Curriculum Design of a Flipped Classroom to Enhance Haematology Learning     

Pauline?A.?Porcaro  Denise?E.?Jackson  Patricia?M.?McLaughlin  Cindy?J.?O’MalleyEmail authorView author&#;s OrcID profile 《Journal of Science Education and Technology》2016,25(3):345-357

A common trend in higher education is the “flipped” classroom, which facilitates active learning during class. The flipped approach to teaching was instituted in a haematology ‘major’ class and the students’ attitudes and preferences for the teaching materials were surveyed. The curriculum design was explicit and involved four major components (1) the preparation of the students; (2) the weekly pre-class work; (3) the in-class active learning strategies and (4) closing the learning loop using formative quizzes. Each of these components is discussed in detail and was informed by sound pedagogical strategies. Several different sources of information and several freely available software tools to engage the students are discussed. Two iterations are reported here, with improved pass rate for the final examination from 47 to 48 % in the traditional class to 56–65 % in the flipped classroom approach. The majority of students (93 and 89 %) came to the class prepared, after viewing the screencasts and engaged fully with the activities within the face-to-face time. The students perceived that solving case studies (93 %) was the most beneficial activity for their learning and this was closely followed by the production of essay plans (71 %). The majority of students recommended that this approach be repeated the following year (69 and 75 %).  相似文献