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161.
Mehrunnisa Ahmad Ali Sheikh Abul Qasim Rafiq Jaffer Jeremy Greenland 《International Journal of Educational Research》1993,19(8)
Based on two recent teacher development efforts in Pakistan, this chapter examines efforts to promote teacher collegiality within these initiatives. The chapter first describes relevant contextual differences among schools in Karachi and summarizes the history of the two projects within this context. It then analyzes similarities and differences across these two projects in how they dealt with collegiality and professional development. While participants in both projects made progress in ameliorating extreme forms of teacher isolation and authoritarian relationships, they also discovered that balancing increased collegiality within a hierarchy of responsibilities and rewards is a difficult and elusive goal. 相似文献
162.
Fikret Korur Sacip Toker Ali Eryılmaz 《Journal of Science Education and Technology》2016,25(4):628-640
This two-group quasi-experimental study investigated the effects of the Online Advance Organizer Concept Teaching Material (ONACOM) integrated with inquiry teaching and expository teaching methods. Grade 7 students’ posttest performances on the light unit achievement and light unit attitude tests controlled for gender, previous semester science grade, and pretest scores were analyzed. No significant treatment effects were found between the inquiry and expository approaches. However, both groups demonstrated significant pretest–posttest gains in achievement and attitude. Independent from the method used, ONACOM was judged effective in both groups as students demonstrated increased achievement and attitude scores. ONACOM has a social and semantic network-aided infrastructure that can be adapted to both methods to increase students’ achievement and improve their attitude. 相似文献
163.
164.
Education and Information Technologies - The aim of this study is to examine mediations of parents who make digital games played by 60–72 months old children accessible, and the... 相似文献
165.
Hamdi F. Ali Abdulrazzak Charbaji Nada Kassim Hajj 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1992,38(5):505-518
The study is aimed at predicting objective criteria based on a statistically tested model for admitting undergraduate students to Beirut University College. The University is faced with a dual problem of having to select only a fraction of an increasing number of applicants, and of trying to minimize the number of students placed on academic probation (currently 36 percent of new admissions). Out of 659 new students, a sample of 272 students (45 percent) were selected; these were all the students on the Dean's list and on academic probation. With academic performance as the dependent variable, the model included ten independent variables and their interactions. These variables included the type of high school, the language of instruction in high school, recommendations, sex, academic average in high school, score on the English Entrance Examination, the major in high school, and whether the major was originally applied for by the student. Discriminant analysis was used to evaluate the relative weight of the independent variables, and from the analysis three equations were developed, one for each academic division in the College. The predictive power of these equations was tested by using them to classify students not in the selected sample into successful and unsuccessful ones. Applicability of the model to other institutions of higher learning is discussed.
Zusammenfassung In Dieser Studie wird versucht, objektive, auf einem statistisch getesteten Modell basierende Kriterien zur Zulassung von Studenten zum Beirut University College herauszufinden. Diese Hochschule muß sich mit zwei Problemen auseinandersetzen, zum ersten nur einen Teil der wachsenden Zahl von Bewerbern zulassen zu können und zum zweiten die Anzahl der Studenten auf akademischer Probezeit zu reduzieren (gegenwärtig 36% der Neuzulassungen). Von 659 neuen Studenten wurden 272 Studenten (45%) fur die Studie ausgewählt: alle vom Dekan erwählte Studenten und Studenten auf akademischer Probezeit. Das Modell beinhaltet zehn unabhängige Variablen und ihre Interaktionen und basiert auf akademischer Leistung als abhängige Variable. Unter diesen Variablen sind: die Art der Sekundarschule, die Lehrsprache an der Sekundarschule, Empfehlungen, Geschlecht, Sekundarschulnoten, Leistungen beim English Entrance Examination (Leistungstest in Englisch), das Hauptfach der Schüler und ob das Hauptfach das vom Schüler ursprünglich gewählte ist. Die statistische Analyse wurde zur Bewertung der relativen Bedeutung der unabhängigen Variablen angewandt, und es wurden drei Gleichungen aus der Analyse entwickelt; eine für jede akademische Abteilung der Hochschule. Die Gültigkeit dieser Gleichungen wurde getestet, indem man sie für die Aufteilung von nicht in die Studie einbezogenen Studenten in erfolgreiche und nicht erfolgreiche Studenten anwandte. Abschließend wird die Anwendbarkeit des Modells auf andere Einrichtungen der Höheren Bildung diskutiert.
Résumé La présente étude vise à prédire les critères objectifs fondés sur un modèle statistiquement vérifié pour l'admission des étudiants à l'Université de Beyrouth. Cette dernière fait face à un problème dual: devoir sélectionner une fraction seulement d'un nombre croissant de candidats et essayer de minimiser le nombre d'étudiants inscrits à l'essai (soit actuellement 36 pour cent des nouvelles admissions). On a sélectionné un échantillon de 272 étudiants sur 659 nouveaux inscrits (soit 45 pour cent). Ces étudiants étaient tous ceux inscrits sur la liste du doyen ainsi que ceux inscrits à l'essai. Avec la performance scolaire comme variable dépendante, ce modèle comptait dix variables indépendantes et leurs interactions. Ces variables incluaient le type d'école supérieure, la langue d'enseignement pratiquée dans celle-ci, les recommandations, le sexe, la moyenne scolaire, la note obtenue à l'épreuve d'anglais de l'examen d'entrée, la matière principale à l'école supérieure, et indiquaient si cette matière avait été choisie par le candidat. On a utilisé F analyse discriminante pour évaluer le poids relatif des variables indépendantes. On a ensuite développé trois équations à partir de ces variables, une pour chacune des sections du collège universitaire. La force prédictive de ces équations a été testée en les employant pour classer les étudiants ne faisant pas partie de l'échantillon sélectionné en deux catégories: ceux ayant réussi et ceux ayant échoué. On discute de l'applicabilité de ce modèle à d'autres instituts d'enseignement supérieur.相似文献
166.
167.
Halim Eshrat M. Ali Hussain Kaiser Jamil Mala Rao 《Indian journal of clinical biochemistry : IJCB》2001,16(1):77-80
The hypoglycemic effect of the aqueous extract ofAbroma augusta (Family: Steculiceae) was studied in normal as well as alloxan diabetic rats. Treatement of diabetic rats with 4 ml (4gm
dry weight) of agueous extract ofA. augusta for 16 weeks resulted in gradual but significant fall in fasting blood glucose and improvement in glucose tolerance. Serum
total and LDL cholesterol and triacylglycerol which increased in diabetic rats showed improvement. These results show that
the water extract ofA. augusta has both hypoglycemic and hypocholesterolemic effects. 相似文献
168.
169.
Plexiform lesions (PLs), which are often accompanied by perivascular infiltrates of mononuclear cells, represent the hallmark lesions of pulmonary arteries in humans suffering from severe pulmonary arterial hypertension (PAH). Endothelial progenitor cells (EPCs) have been recently implicated in the formation of PLs in human patients. PLs rarely develop in rodent animal models of PAH but can develop spontaneously in broiler chickens. The aim of the present study was to confirm the presence of EPCs in the PLs in broilers. The immune mechanisms involved in EPC dysfunction were also evaluated. Lungs were collected from commercial broilers at 1 to 4 weeks of age. The right/total ventricle ratios indicated normal pulmonary arterial pressures for all sampled birds. Immunohistochemistry was performed to determine the expressions of EPC markers (CD133 and VEGFR-2) and proangiogenic molecule hepatocyte growth factor (HGF) in the lung samples. An EPC/lymphocyte co-culture system was used to investigate the functional changes of EPCs under the challenge of immune cells. PLs with different cellular composition were detected in the lungs of broilers regardless of age, and they were commonly surrounded by moderate to dense perivascular mononuclear cell infiltrates. Immunohistochemical analyses revealed the presence of CD133+ and VEGFR-2+ cells in PLs. These structures also exhibited a strong expression of HGF. Lymphocyte co-culture enhanced EPC apoptosis and completely blocked HGF-stimulated EPC survival and in vitro tube formation. Taken together, this work provides evidence for the involvement of EPCs in the development of PLs in broilers. It is suggested that the local immune cell infiltrate might serve as a contributor to EPC dysfunction by inducing EPC death and limiting their response to angiogenic stimuli. Broiler chickens may be valuable for investigating reversibility of plexogenic arteriopathy using genemodified inflammation-resistant EPCs. 相似文献
170.
School is often ranked highly among social agents that are central to the development of various citizenship values and norms in younger members of society. In this paper, we examined the impact of two dimensions of school climate on changes in social trust among adolescents over time, namely relationships and safety. Using a series of latent change models on 3-wave panel data concerning roughly 850 Swedish adolescents aged 16 to 18 years, we found that experiences of victimization in school mattered most in predicting changes in social trust across 3 time points, when relevant demographic factors and other aspects of the school climate were controlled. In particular, social trust declined most among adolescents who experienced more victimization at school. 相似文献