Integrating External Knowledge to Supplement Training Data in Semi-Supervised Learning for Text Categorization     

Mohammed Benkhalifa  Abdelhak Mouradi  Houssaine Bouyakhf 《Information Retrieval》2001,4(2):91-113

Text Categorization (TC) is the automated assignment of text documents to predefined categories based on document contents. TC has been an application for many learning approaches, which prove effective. Nevertheless, TC provides many challenges to machine learning. In this paper, we suggest, for text categorization, the integration of external WordNet lexical information to supplement training data for a semi-supervised clustering algorithm which can learn from both training and test documents to classify new unseen documents. This algorithm is the Semi-Supervised Fuzzy c-Means (ssFCM). Our experiments use Reuters 21578 database and consist of binary classifications for categories selected from the 115 TOPICS classes of the Reuters collection. Using the Vector Space Model, each document is represented by its original feature vector augmented with external feature vector generated using WordNet. We verify experimentally that the integration of WordNet helps ssFCM improve its performance, effectively addresses the classification of documents into categories with few training documents and does not interfere with the use of training data.  相似文献   

基于需求和自我效能理论构建研究生英语分级教学新模式     

安静  茹克叶＆#;穆罕默德  许秀妍  高平 《中国地质教育》2014,(1):58-61

分级教学改革旨在解决公共研究生英语教学中存在的问题,改革无论学生英语水平如何、需求如何,都使用同一本教材、采用同一种教学模式、教授同一种课型的方式。本文采取针对硕士研究生的不同英语水平和不同主体关于英语学习的不同需求进行"有的放矢"、"因材施教"的教学新模式,目标是缩小研究生的英语语言知识与实际应用能力之间的差距,促进学生英语能力与其本领域的研究相结合。  相似文献   

Cognitive levels and linguistic abilities of elementary school children     

Mohammed A. Kishta 《科学教学研究杂志》1979,16(1):67-71

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Learning and study strategies correlate with medical students' performance in anatomical sciences          下载免费PDF全文

Mohammed K. Khalil  Shanna E. Williams  H. Gregory Hawkins 《Anatomical sciences education》2018,11(3):236-242

Much of the content delivered during medical students' preclinical years is assessed nationally by such testing as the United States Medical Licensing Examination^® (USMLE^®) Step 1 and Comprehensive Osteopathic Medical Licensing Examination^® (COMPLEX‐USA^®) Step 1. Improvement of student study/learning strategies skills is associated with academic success in internal and external (USMLE Step 1) examinations. This research explores the strength of association between the Learning and Study Strategies Inventory (LASSI) scores and student performance in the anatomical sciences and USMLE Step 1 examinations. The LASSI inventory assesses learning and study strategies based on ten subscale measures. These subscales include three components of strategic learning: skill (Information processing, Selecting main ideas, and Test strategies), will (Anxiety, Attitude, and Motivation) and self‐regulation (Concentration, Time management, Self‐testing, and Study aid). During second year (M2) orientation, 180 students (Classes of 2016, 2017, and 2018) were administered the LASSI survey instrument. Pearson Product‐Moment correlation analyses identified significant associations between five of the ten LASSI subscales (Anxiety, Information processing, Motivation, Selecting main idea, and Test strategies) and students' performance in the anatomical sciences and USMLE Step 1 examinations. Identification of students lacking these skills within the anatomical sciences curriculum allows targeted interventions, which not only maximize academic achievement in an aspect of an institution's internal examinations, but in the external measure of success represented by USMLE Step 1 scores. Anat Sci Educ 11: 236–242. © 2017 American Association of Anatomists.  相似文献   

Learning communities and fair trade in doctorates and development: report of a collaborative project     

Janinka Greenwood  Safayet Alam  Abu Nayeem Mohammad Salahuddin  Mollah Mohammed Haroon-Ar Rasheed 《Globalisation, Societies & Education》2016,14(1):49-67

This article reports the second stage of a study examining an academic partnership in which Bangladeshi doctoral students in a western university focus their research in the grounded context of Bangladesh and investigate the processes for change. After briefly outlining the previous published stage which examined the academic trade in higher education with developing countries, the article builds on the concept of fair academic trade to critically reflect on the development of a doctoral learning community, a publication project and three specific doctoral studies. The methodological approach is one of participatory action research, with focus on critical reflection on practice.  相似文献   

The triad-iodine deficiency,hyperlipidaemia, high coronary risk— in a ‘maternal-neonate’ population of rural Africa     

Santosh C. Das  Aminu Z. Mohammed  Sani U. Al-Hassan  Abraham A. Otokwula  Uche P. Isichei 《Indian journal of clinical biochemistry : IJCB》2007,22(2):79-83

In order to see the pattern of changes in differential serum lipid and lipoprotein fractions as a risk marker of coronary complication in paired ‘maternal—neonate’ blood samples in an iodine deficient zone, 26 pregnant women and their corresponding new born infants at term delivery from the iodine deficient Bassa region of Plateau state, Nigeria were assessed and the results were compared with those seen in a similar 44 group of women and their newborns assessed in non lodine deficient region of Jos. The serum thyroid function and lipid and lipoprotein profiles were determined by ‘ELISA’ and ‘enzymatic’ methods respectively. Urinary iodide excretion level was also measured in 14 pregnant women in Bassa, 23 pregnant women in Jos and 16 non pregnant control from Jos. Results indicate that the pregnant women assessed in Bassa were iodine deficient (P<0.01) and their thyroid status was strikingly reduced as reflected by a drop in serum level of T4/TBG ratio (P<0.01) and a rise in TSH (P<0.005) in comparison to that seen in Jos. There was marked hypertriglyceridaemia and total hypercholesterolaemia (P<0.005), with differential significant rise in LDL cholestotol fraction (P<0.005) in the women assessed in Bassa as compared to Jos. The HDL cholesterol however dropped less significantly in the group (P<0.05) with a concurrent marked rise (P<0.001) in the serum ratio of LDL cholesterol/HDL cholesterol, total cholesterol/HDL cholesterol and triglycerides/HDL cholesterol in the lodine deficient group. A similar pattern of changes were seen in the corresponding neonates in the Bassa group as compared to Jos group. It is concluded that the pregnant women and their newborn offsprings living in a longstanding environmental iodine deficiency run a higher risk of developing coronary complications than those living in non endemic region. It is striking that such newborns surrounded by a continued state of lodine deficient may at a later adult-period of life develop marked risk of coronary complication and other features of hyperlipidaemias associated with varying thyroid insufficiency and accompanied iodine deficiency disorders. Prophylaxis measures as intervention has been highlighted.  相似文献   

Library Anxiety among Undergraduate Students: A Comparative Study on Egypt and Saudi Arabia     

Ahmed Maher Khafaga Shehata  Mohammed Fathy Mahmoud Elgllab 《The Journal of Academic Librarianship》2019,45(4):386-393

The purpose of this paper is to report the findings of a study of library anxiety among a group of Arab students in Saudi Arabia and Egypt. The paper also investigated the factors that affect the students' level of anxiety while using academic libraries. The study tried to compare the difference in the level of anxiety in the two countries using a scale (LLPB) developed by the researchers which fit the culture in the Arab region. The study adopted a mixed methods approach. Semi-structured interviews were conducted with several students in Saudi Arabia and Egypt to determine the main factors that lead to having a level of anxiety in the libraries. In the second stage, a questionnaire was sent to students to measure what factors have a greater impact on the level of anxiety. The data showed that Egyptian students are more anxious about using the libraries than the Saudi students. The results also indicated that there is a need to train students on how to use the libraries and also change students' perception regarding the library to reduce the level of anxiety. This study was conducted in Egypt and Saudi Arabia the level of library anxiety and the factors that may affect the students may vary in other countries.  相似文献   

ERSDO: E-learning Recommender System based on Dynamic Ontology     

Amane  Meryem  Aissaoui  Karima  Berrada  Mohammed 《Education and Information Technologies》2022,27(6):7549-7561

Education and Information Technologies - In distance learning, recommendation system (RS) aims to generate personalized recommendations to learners, which allows them an easy access to various...  相似文献   

Exploring students’ expectations of learning analytics: A person-centered approach     

Viberg  Olga  Engström  Linda  Saqr  Mohammed  Hrastinski  Stefan 《Education and Information Technologies》2022,27(6):8561-8581

Education and Information Technologies - In order to successfully implement learning analytics (LA), we need a better understanding of student expectations of such services. Yet, there is still a...  相似文献   

Retracted: On a Patrol Problem     

Mohammed Ageel 《Teaching Statistics》1997,19(3):84-86

Retraction: The following article from Teaching Statistics, ‘On a Patrol Problem’ by Mohammed Ageel, published online on 8 June 2007 on Wiley Online Library (onlinelibrary.wiley.com), has been retracted by agreement between the author, the current and immediate past journal Editors, Paul Hewson and Roger Johnson, the Trustees of Teaching Statistics and Blackwell Publishing Ltd. The retraction has been agreed due to unacknowledged overlap with ‘A Patrol Problem’ by Alan Levine, published in Mathematics Magazine, vol. 59, no. 3, pp. 159–166 (1986).  相似文献