Effective self-regulation of goal attainment     

Gabriele  Gaby  Peter M.   《International Journal of Educational Research》2000,33(7-8):705-732

Self-regulatory strategies of goal setting and goal striving are analyzed in three experiments. Experiment 1 uses fantasy realization theory (Oettingen, in: J. Brandstätter, R.M. Lerner (Eds.), Action and Self Development: Theory and Research through the Life Span, Sage Publications Inc, Thousand Oaks, CA, 1999, pp. 315–342) to analyze the self-regulatory processes of turning free fantasies about a desired future into binding goals. School children 8–12 years of age who had to mentally elaborate a desired academic future as well as present reality standing in its way, formed stronger goal commitments than participants solely indulging in the desired future or merely dwelling on present reality (Experiment 1). Effective implementation of set goals is addressed in the second and third experiments (Gollwitzer, Am. Psychol. 54 (1999) 493–503). Adolescents who had to furnish a set educational goal with relevant implementation intentions (specifying where, when, and how they would start goal pursuit) were comparatively more successful in meeting the goal (Experiment 2). Linking anticipated situations with goal-directed behaviors (i.e., if–then plans) rather than the mere thinking about good opportunities to act makes implementation intentions facilitate action initiation (Experiment 3).  相似文献   

Elektronische Vertr?ge und ihre verbindliche Aushandlung
Ein formales Modell für verbindliche Telekooperation     

Rüdiger Grimm  Peter Ochsenschl?ger 《Informatik - Forschung und Entwicklung》2000,37(2):182-192

Dieser Artikel erarbeitet eine formale Bestimmung der Begriffe “elektronischer Vertrag”, seine “Ziele”, “Verpflichtungen” und seine “verbindliche Aushandlungsphase”. Die hier erarbeiteten Begriffe dienen erstens der Spezifikation elektronischer Vertr?ge und zweitens der Verifikation lokaler Implementationen von elektronischen Vertragskooperationen. Besonders behandelt werden die lokale Darstellungen von Vertr?gen und ihre vermittelnde Kommunikation, mehrfache sowie sich überlappende Durchl?ufe durch eine verbindliche Phase und die Rolle von Beweismitteln. Die Begriffe beruhen auf der Theorie der formalen Sprachen bzw. der Automaten. Sie werden an einem einfachen Beispiel einer bilateralen Auftragskooperation demonstriert.  相似文献   

Entwurf und Implementierung eines SQL-normkonformen Datenbankkatalogs für ein relationales Datenbankmanagementsystem     

Steffen Skatulla  Ralf Schaarschmidt  Peter Pistor  Klaus Küspert 《Informatik - Forschung und Entwicklung》2000,22(2):161-170

Bei relationalen Datenbanksystemen haben sich de-jure-Normen für SQL stetig weiterentwickelt; mit diesen Normen wird es einfacher, portable Datenbankanwendungen zu entwickeln. Die SQL-Norm ruht auf zwei S?ulen, zum einen auf der Datenbanksprache SQL, zum anderen auf einer Vorgabe eines Datenbankkatalogs, welcher die gespeicherten Daten beschreiben soll. Im vorliegenden Beitrag wird derjenige Teilbereich des Datenbankkatalogs der aktuellen SQL99-Norm dargestellt, der bereits in der SQL92-Norm (ISO/IEC 9075:1992 bzw. DIN 66315) definiert ist und die klassischen (nicht objektrelationalen) Elemente einer relationalen Datenbank beschreibt. In dieser Darstellung nimmt der zweischichtige Spezifikationsansatz (Informationsschema, Definitionsschema) einigen Raum ein; mit seiner Hilfe weist SQL einen eleganten Weg, auf dem existierende Datenbanksysteme normkonforme Datenbankkataloge bereitstellen k?nnen. Anhand des Datenbankmanagementsystems DB2 wird anschlie?end untersucht, wie ein normkonformer Datenbankkatalog (das sogenannte Informationsschema) „oberhalb” des verfügbaren DB2-Katalogs realisiert werden kann, d. h. wie die vom Informationsschema geforderten Sichten auf DB2-Katalogtabellen abgebildet werden k?nnen. Auf generelle Schwierigkeiten und M?glichkeiten einer solchen Abbildung (ein- oder zweistufig) wird ebenso eingegangen wie auf Probleme, die sich speziell bei DB2 ergeben. In einer prototypischen Realisierung konnte das Informationsschema bis auf wenige Einschr?nkungen komplett umgesetzt werden. Damit wurde die Machbarkeit normkonformer Kataloge nachgewiesen. In heute verfügbaren DBMS-Produkten sind Datenbankkataloge in dieser konsequent normkonformen Gestalt leider immer noch nicht anzutreffen.  相似文献   

Blood flow restriction in human skeletal muscle during rest periods after high-load resistance training down-regulates miR-206 and induces Pax7     

Ferenc Torma  Zoltan Gombos  Marcell Fridvalszki  Gergely Langmar  Zsofia Tarcza  Bela Merkely  Hisashi Naito  Noriko Ichinoseki-Sekine  Masaki Takeda  Zsolt Murlasits  Peter Osvath  Zsolt Radak 《运动与健康科学(英文)》2021,10(4):470-477

BackgroudBlood flow restriction (BFR) with low-intensity resistance training has been shown to result in hypertrophy of skeletal muscle. In this study, we tested the hypothesis that BFR during the rest periods between acute, high-intensity resistance exercise sessions (70% of 1 repetition maximum, 7 sets with 10 repetitions) enhances the effects of the resistance training.MethodsA total of 7 healthy young men performed squats, and between sets BFR was carried out on one leg while the other leg served as a control. Because BFR was applied during rest periods, even severe occlusion pressure (approximately 230 mmHg), which almost completely blocked blood flow, was well-tolerated by the participants. Five muscle-specific microRNAs were measured from the biopsy samples, which were taken 2 h after the acute training.ResultsDoppler data showed that the pattern of blood flow recovery changed significantly between the first and last BFR. microRNA-206 levels significantly decreased in the BFR leg compared to the control. The mRNA levels of RAC-β serine/threonine-protein kinase v22, nuclear respiratory factor 1, vascular endothelial growth factor, lupus Ku autoantigen protein p70 genes (p < 0.05), and paired box 7 (p < 0.01) increased in the BFR leg. The protein levels of paired box 7, nuclear respiratory factor 1, and peroxisome proliferator-activated receptor γ coactivator 1α did not differ between the BFR leg and the control leg.ConclusionBFR, during the rest periods of high-load resistance training, could lead to mRNA elevation of those proteins that regulate angiogenesis, mitochondrial biogenesis, and muscle hypertrophy and repair. However, BFR also can cause DNA damage, judging from the increase in mRNA levels of lupus Ku autoantigen protein p70.  相似文献   

Information needs of public health practitioners: a review of the literature     

Jennifer Ford  Helena Korjonen 《Health information and libraries journal》2012,29(4):260-273

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A Methodological Toolkit for Science     

Kosso  Peter 《Science & Education》2020,29(1):203-206

Science & Education -  相似文献   

A survey of talent identification and development processes in the youth academies of professional soccer clubs from around the world     

Paul R. Ford  Juan Luis Delgado Bordonau  Daniele Bonanno  José Tavares  Corne Groenendijk  Cristina Fink 《Journal of sports sciences》2020,38(11-12):1269-1278

ABSTRACT

Talent identification (TID) and development (TDE) are large fields in professional soccer and in science. However, TID and TDE processes in youth academies have not been assessed in detail. As such, our aim was to survey professional clubs from around the world about their youth academy TID and TDE processes, with 29 clubs responding to the survey. TID and TDE processes changed as a function of player age. TID processes involved finding the best players locally and regionally, but for older players the search widened to nationally and internationally for the needs of the first team. Clubs used a multidisciplinary approach to TID, but more so with older players. Median number of academy players was 80, 100, and 66 players at 8–11 years, 12–16 years, and 17–21 years, respectively. Annual player turnover in the most recent season (selections/de-selections) was 29% across all age groups, with competition from other clubs cited as a limitation to TID. TDE processes involved weekly matches and 3–5 training sessions per week led by experienced, well-qualified coaches, with most clubs providing players with academic education, residency and transportation services. Our findings extend previous research assessing professional soccer youth academy TID and TDE processes by quantifying worldwide practices.  相似文献   

Achieving a restructured depository library program     

Peter Hernon   《Government Information Quarterly》1993,10(4)

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Changing Children's Overt Behaviour Related to Self‐esteem by the Use of Behaviour Modification     

Peter Gurney 《教育心理学》1987,7(2):91-102

Abstract The experiment was designed to monitor the effects of behavioural techniques upon the frequency of positive self‐referent verbal statements (PSRVS) and on overt behaviours considered to be related to global self‐esteem. Fourteen maladjusted boys aged 10‐12 years were randomly assigned to an experimental and control group to monitor the effect of procedures to enhance the frequency of PSRVS. Both groups experienced extraction procedures and rewards but only the experimental group received modelling, instruction and contingent rewards. An ABCDA design demonstrated a very substantial and significant increase in PSRVS within the experimental group over the treatment period and provided some evidence for a generalisation effect on return to baseline and in the follow‐up period. A post‐experiment analysis of teacher ratings of the pupils on the Behaviour Rating Form (BRF) showed a significant difference in favour of the experimental group.  相似文献   

The Canadian connection: A co-operative approach to management development     

Peter J. Murphy 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1984,30(2):198-202

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