Editorial zum Themenheft: ,,Datenbanksysteme”     

Theo H?rder 《Informatik - Forschung und Entwicklung》2005,20(3):119-120

Ohne Zusammenfassung  相似文献   

Editorial     

Theo H?rder  Stefan J?hnichen 《Informatik - Forschung und Entwicklung》2004,2(1):103-104

  相似文献   

Generierte DB-Aufrufschnittstellen – Anwendungsspezifische Zugriffsoptimierung durch Bindungsflexibilit?t     

Theo H?rder  Udo Nink  Norbert Ritter 《Informatik - Forschung und Entwicklung》2000,7(3):67-82

Jede Datenbankprogrammierschnittstelle mu? sich daran messen lassen, inwieweit sie die Vorteile der durch sie integrierten Sprachen (Datenbank- und Programmiersprache) erh?lt. Neben dieser allgemeinen Zielsetzung müssen heutzutage neuere Konzepte in den Bereichen Programmiersprachen und Datenbanksysteme sowie die Anforderungen komplexer Anwendungsbereiche (z. B. CAD oder Software-Entwicklung) beachtet werden. Unser Ansatz der generierten Aufrufschnittstellen soll dazu beitragen, Datenmodelle objekt- relationaler Datenbanksysteme und Typsysteme objektorientierter Programmiersprachen n?her zusammenzurücken. Er erlaubt neben der Schnittstellengenerierung ihre anwendungsspezifische Konfigurierung, um die DB-Verarbeitung spezieller Anwendungen gezielt optimieren zu k?nnen. Wir werden neben Aspekten der Generierung/Konfigurierung die Nutzung von generierten Aufrufschnittstellen beschreiben und Experimente vorstellen, die den durch diesen Ansatz erzielbaren Leistungsgewinn verdeutlichen. Letzterer kann durch gezielten, auf die jeweilige Anwendung zugeschnittenen Einsatz von frühen Bindungen für Datenmanipulationsoperationen sowie von Pointer-Swizzling-/Prefetching-Mechanismen erreicht werden.  相似文献   

A Take on a Gothic Poem: Tablet Film-making and Literary Texts     

Theo Bryer  Morlette Lindsay  Rebecca Wilson 《Changing English: An International Journal of English Teaching》2014,21(3):235-251

  相似文献   

STABILITY OF SCALE QUALITY UNDER VARIOUS DATA COLLECTION PROCEDURES: A MODE COMPARISON ON THE 'DE JONG-GIERVELD LONELINESS SCALE   总被引：1，自引：0，他引：1  

Tilburg  Theo van; Leeuw  Edith de 《Int. Journal of Public Opinion Research》1991,3(1):69-85

Data collection procedures can influence respondents' self-disclosure,accuracy and motivation to complete the interview. In comparingresearch results across different studies, it is important touse robust measuring instruments. The ‘De Jong-GierveldLoneliness Scale’ was developed to measure lonelinessamong different populations and in studies with different designs.Data on this loneliness scale were re-analyzed to investigatethe robustness of the scale. The data were from six Dutch surveys.Different interview modes were used for data collection: threesurveys with self-administered paper questionnaires, two surveyswith face-to-face interviews, and one telephone survey. In orderto compare the properties of the loneliness scale, a relativelyhomogeneous category of respondents was selected: single womenbetween the ages of 25 and 65. An examination of the scale withregard to five aspects of robustness showed in very few casesthat it was affected. No evidence was found for the assumptionthat the use of a self-administered questionnaire would leadto high item non-response, any higher than using other datacollection procedures. It was also assumed that in self-administeredquestionnaires or telephone interviews, a better inter-itemhomogeneity and a better person scalability would be found instudies with face-to-face interviews. The results sustainedthis hypothesis. Further, it was believed that the absence ofan interviewer would result in greater self-disclosure and thereforein higher scale means. We found on evidence to support this.In general the results showed that the loneliness scale metthe psychometric requirements of items non-response, scale homogenityand person scalability. After testing the robustness of thescale, we conclude that it is questionable on two aspects: theinter-item homogeneity and the person scalability.  相似文献   

Teacher Education and the Universities in The Netherlands     

Theo Wubbels 《欧洲师范教育杂志》1992,15(3):157-172

  相似文献   

Editorial     

Peter Horsman  Eric Ketelaar  Theo Thomassen 《Archival Science》1987,1(3):241

  相似文献   

Secondary Teachers' Interpersonal Behaviour in Singapore,Brunei and Australia: A cross-national comparison     

Perry den Brok  Darrell Fisher  Theo Wubbels  Mieke Brekelmans  Tony Rickards 《Asia Pacific Journal of Education》2006,26(1):79-95

This study investigates the reliability and validity of the Questionnaire on Teacher Interaction (QTI) in three countries: Singapore, Brunei and Australia. The QTI maps student perceptions of interpersonal teacher behaviour and is based on the circumplex Model for Interpersonal Teacher Behaviour (MITB) that investigates the teacher–student relationship in terms of the two dimensions of influence and proximity. Students' perceptions of their teachers in the three countries are also compared. Results show that the QTI scales are represented by two independent dimensions and that scales can be ordered in terms of a circular structure. However, empirical scale locations differ from their theoretical positions as hypothesised by the circumplex model, and among countries. Differences in teacher influence and proximity are also found among the countries.  相似文献   

Students' Perceptions of Interpersonal Aspects of the Learning Environment   总被引：1，自引：0，他引：1  

Levy  Jack  Wubbels  Theo  Den Brok  Perry  Brekelmans  Mieke 《Learning Environments Research》2003,6(1):5-36

This study examined variables associated with differences in students' perceptions of interpersonal teacher behavior. The perceptions of 3023 students and 74 teachers in 168 classes in seven secondary schools were used in the analyses. Investigating variance at the student, class, teacher and school levels revealed that several variables are significantly related to students' perceptions: student and teacher gender, student and teacher ethnic background, student age and grade, class size, grade level, subject taught and teacher experience. There were interaction effects between some variables, such as student ethnicity and student gender, as well as student and teacher gender. While significant, the amount of variance explained by these was low (around 10%). The outcomes generally confirmed earlier research, although some new effects were found. Perhaps the main result of the study was its verification of the complex and interactive nature of students' perceptions of the learning environment and researchers' understanding of it.  相似文献   

A study of student perceptions of physics teacher behavior     

Mieke Brekelmans  Theo Wubbels  Hans Crton 《科学教学研究杂志》1990,27(4):335-350

This study investigates student perceptions of the behavior of physics teachers in relation to some other variables in the classroom situation. The research was carried out as a Dutch option of the Second International Science Study. Data were gathered in 65 classrooms of physics teachers with pupils 15 years old. Some of the teachers (21) used the new PLON curriculum and the others a traditional one. Student perceptions of teacher behavior were measured with a questionnaire based on the interpersonal theory of Leary (1957). The aspect of behavior measured is called interactional teacher behavior. We found remarkably high correlations between student perceptions of teacher behavior and affective outcomes such as appreciation of the lessons and motivation for the subject matter. Also, the correlations with cognitive outcomes measured with a standardized international test were significant. It appears that some differences exist between teacher behaviors that are favorable for high cognitive outcomes and behaviors favorable for high affective outcomes in physics lessons. Hardly any differences were found in teacher behavior between teachers using the traditional and the new physics curriculum.  相似文献