Szenario-basierter Systemtest von Software-Produktfamilien     

Andreas Reuys  Erik Kamsties  Klaus Pohl und Sacha Reis 《Informatik - Forschung und Entwicklung》2005,20(1-2):33-44

Zusammenfassung In der Produktfamilienentwicklung werden durch zwei Entwicklungsprozesse, Domain und Application Engineering, zun"achst wiederverwendbare Entwicklungsartefakte produziert, um diese anschlie?end zur Konstruktion von kundenspezifischen Applikationen einzusetzen. Die Wiederverwendbarkeit wird durch die explizite Definition der Variabilit"at der geplanten Applikationen einer Produktfamilie erzielt. Diese proaktive Wiederverwendung ist bisher in den konstruktiven Entwicklungsphasen realisiert, jedoch noch nicht im Test. Mit ScenTED (Scen_ario based TE_st Case D_erivation) wird in diesem Beitrag eine wiederverwendungsorientierte Technik zur Testfallerstellung f"ur den Systemtest, dem Test eines ausf"uhrbaren Systems gegen spezifizierte Use-Cases, von Produktfamilien vorgestellt. ScenTED basiert auf zwei Kernideen: der Erhaltung der Variabilit"at in Testf"allen und der Szenario-basierten Verfeinerung der Testf"alle. Durch die Erhaltung der Variabilit"at wird die Wiederverwendbarkeit von Testf"allen gesichert; die Szenario-basierte Verfeinerung erm"oglicht Nachvollziehbarkeit durch die durchg"angige Nutzung von Szenarien. In diesem Beitrag wird die ScenTED-Technik an einem Beispiel erl"autert und Erfahrungen aus dem industriellen Einsatz diskutiert.

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Product family engineering consists of two development processes: Domain engineering and application engineering. Reuseable artefacts are created in the domain engineering process. These artefacts are used for the creation of customer specific applications during the application engineering process. Reusability is achieved with the explicit definition of variability that specifies the potential applications of the product family. The proactive reuse has been realized in the construnction phases of the development process, but not within the test phases. We propose ScenTED (Scen_ario based TE_st Case D_erivation) for the creation of reusable test cases for a use case based system testing in product family engineering. ScenTED has two key ideas: The first is the preservation of variability in test cases and the second idea is the scenario-based refinement of test cases. The preservation of variability ensures the reusability of test cases. The scenario-based refinement enables the traceability from requirements to test cases. We present the ScenTED technique in this article with an example and discuss an industrial case study.

CR Subject Classification D2.5  相似文献   

Dopaminerge Modulation striataler Plastizität     

Frieder Beck  Klaus Blischke  Birgit Abler 《Sportwissenschaft》2012,42(4):271-279

This article attempts to outline the neuronal foundations of movement automatization. In particular, it is shown that an increase in automaticity corresponds to processes of synaptic plasticity in the corticostriatal and corticocortical system. This mechanism is supposed to induce changes in the neuronal representations of the respective skill. Furthermore, the role of phasic dopamine release will be discussed with respect to its modulating effect on processes of plasticity.  相似文献   

Retention of EBM competencies     

Dorsch J  Aiyer MK  Gumidyala K  Meyer LE 《Medical reference services quarterly》2006,25(3):45-57

This longitudinal follow-up study surveyed the attitudes toward, and skills in, evidence-based medicine (EBM) of medical school graduates who had participated in a formal EBM curriculum during their third-year Internal Medicine (IM) clerkship. The objective was to measure whether competencies were retained over time and to identify the long- term impact on the graduates' attitudes toward, and proficiency in, EBM after graduation. Questionnaire results showed that a group of medical school graduates retained EBM skills and a positive attitude about the importance of applying EBM principles in patient care one to three years after completing an EBM course.  相似文献   

Teachers’ dilemmatic decision-making: reconciling coexisting policies of increased student retention and performance     

Charlotte Jonasson  Åsa Mäkitalo  Klaus Nielsen 《Teachers and Teaching》2013,19(7):831-842

In recent years, many countries within the Organisation for Economic Co-operation and Development have formulated educational policies aimed at providing better education to more students. However, this may be perceived as constituting dilemmatic spaces, where teachers must make efforts to reconcile coexisting political demands in their everyday work. The purpose of this article is to provide insight into how teachers handle coexisting educational policies of increased student retention and performance. Empirical findings from a one-year field study at a Danish vocational school explore how teachers’ decision-making as response to coexisting demands of increased student retention and performance involves the development of various pedagogical approaches to the students: an active ‘caring’ approach, a passive ‘wait until this class is over’ approach, an active ‘vocational gate-keeping’ approach, and a passive ‘wait and see whether they drop out’ approach. Based on the findings, it is argued that the various pedagogical approaches are developed through social negotiations with leaders, students, and other teachers. Moreover, these pedagogical approaches lead to the development of further negotiated, dilemmatic decisions to be made. Thus, a dynamic approach to teachers’ dilemmatic decision-making is proposed.  相似文献   

Supporting the information gathering practices of academically advanced college-bound students     

Melanie S. Meyer  Jeff Cranmore 《Psychology in the schools》2020,57(7):1057-1076

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Teaching the partial products algorithm with the concrete representational abstract sequence and the strategic instruction model     

Margaret M. Flores  Alexcia J. Moore  Jill M. Meyer 《Psychology in the schools》2020,57(6):946-958

Elementary standards include multiplication of single-digit numbers and students advance to solve complex problems and demonstrate procedural fluency in algorithms. The ability to illustrate procedural fluency in algorithms is dependent on the development of understanding and reasoning in multiplication. Development of multiplicative reasoning provides the foundation for advanced mathematics and algebraic reasoning. For students who struggle in mathematics, instruction in multiplication algorithms should ensure conceptual understanding so that students have a foundation for success in advanced mathematics. The concrete representational abstract (CRA) sequence addresses conceptual understanding and the strategic instruction model (SIM) supports procedural knowledge. The current pilot study combined these methods to teach elementary students the partial products algorithm. Twelve students in grades four and five participated in the study, receiving instruction from teachers in their school during an intervention period. Within a pre-experimental design, using pre- and postintervention data, students showed a significant change in performance. The article will describe and show how teachers implemented the CRA-SIM interventions and discuss implications for practice.  相似文献   

Jon Lauglo, Peter Lang, Frankfurt, Se-Yung Lim, Klaus Schaack (Eds.), Education, Training and Contexts Studies and Essays, ISBN 3-631-39547-7, US edn 0-8204-5981-X, 2002 (433pp.)..     

Jon Lauglo  Peter Lang  Frankfurt  Se-Yung Lim  Klaus Schaack  Education  Training  Contexts Studies  Essays  ISBN ---  US edn ---X  . 《International Journal of Educational Development》2005,25(6):669-670

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The measurement of goal attainment of governmental R&D support     

Klaus Brokhoff 《Research Policy》1983,12(3):171-182

Efficiency measurement of governmental R&D subsidies is a complicated task. The suggestion is made to derive the subsidization objectives from the programs themselves along seven dimensions. If completely defined and if properly operationalized, these could be used as a basis for efficiency measurement. Various levels of measurement and the related problems are reviewed. As information on a program and its acceptance are of importance for governmental planning, the development of diffusion models for this special purpose is suggested. A most simple version is given to start discussion. The ideas developed are illustrated by reference to empirical research on two related subsidization programs in the Federal Republic of Germany.  相似文献   

Impressions of disadvantage: II-Monitoring and assisting the student at risk     

J. H. F. Meyer  A. F. Cliff  T. T. Dunne 《Higher Education》1994,27(1):95-117

Two studies on monitoring and assisting students at risk are presented against a contemporary perspective in higher education: that of monitoring and developing the quality of student learning. A basis for risk categorisation at an individual level is outlined, and the effects of an intervention aimed at students at risk are evaluated in two contrasting settings. At risk in the present study represents, in conceptual terms, a relatively extreme set of learning behaviours.The first study approximates an ideal set of circumstances in which an individual-level intervention for students conceptually at risk is described. The second study reflects the uncompromising reality of a large first-year service course, in which a reduced form of the same intervention was pragmatically attempted. In both interventions the emphasis was on assisting students to engage manifestations of their own self-reported, contextualised study behaviour. This was the starting point of a developmental and reflective programme in which students were not taught study skills, but were rather assisted to develop deeper contextual perceptions, metalearning awareness, and internal locus.The targeted students in these studies, and the basic nature of the intervention employed, differ considerably from those used in other intervention studies. The first study produced positive results, while the second study did not. An overall conclusion is that, while interventions of the type described can assist students to develop their learning potential, they can only do so in carefully managed circumstances that are sensitive to individual students' learning problems and the discipline-specific context in which these occur.  相似文献   

Sickness presenteeism of German teachers: prevalence and influencing factors     

Sarah Dudenhöffer  Klaus Schöne  Stephan Letzel  Dirk-Matthias Rose 《Teachers and Teaching》2017,23(2):141-152

The aim of the present study was to investigate teachers’ sickness presenteeism (SP). We examined the prevalence of SP in a sample of teachers as well as work-related and health-related influencing factors of teachers’ SP. We used a cross-sectional study design. Teachers working at different types of schools in Rhineland-Palatinate (Germany) participated in an online survey. We used Pearson’s Chi-squared test (in case of categorical variables) or Mann–Whitney-U-test (in case of continuous variables) to test for differences between SP and sociodemographic/work-related/health-related factors. Factors influencing SP were identified using multivariable logistic regression analyses. Nine hundred and twenty-four teachers working at 42 different schools completed the questionnaire (response proportion: 50.1%). The prevalence of SP in our study was 57.1%. The multivariable logistic regression analyses showed less support by supervisors (aOR: 1.77; 95-CI: 1.21–2.60), inappropriate administration efforts (aOR: 1.56; 95-CI: 1.16–2.11), and inappropriate recognition of performance (aOR: 1.44; 95-CI: 1.04–198) as well as exhaustion/fatigue (aOR: 2.29; 95-CI: 1.71–3.08) as main predictors of teachers’ SP. SP is widespread among teachers. As SP is associated with impairment of psychological and physical health in the long run, it is important to implement measures to reduce SP. A climate of support and cooperation as well as assistance for ill teachers to deal with work missed due to absence might be useful strategies.  相似文献