Dynamic programming and partial differential equations : Edward Angel and Richard Bellman. 204 pages,diagrams, 6x9 in. New York,Academic Press, 1971. Price $11.50 (approx. £4·40). £4·40).     

J.Nestor Distefano 《Journal of The Franklin Institute》1973,296(1):72-73

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Leveraging Sunken Investments in Communications Infrastructure: A Policy Perspective From the United States     

Anthony G. Wilhelm 《The Information Society》2003,19(4):279-286

Bridging the digital divide between information and technology haves and have-nots has waned from the top of the national policy agenda in the United States during a time in which the sunken investments of the 1990s need to be leveraged. A national information network now exists yet this infrastructure--largely hardware--needs to be continually modernized and parlayed with commitments to building human capacity, developing relevant content, and scaling socially beneficial technology applications, such as telemedicine, in order to optimize these initial multi-billion-dollar outlays. This article makes the case that sidestepping public-private initiatives aimed at accelerating digital opportunity is imprudent, given the mounting empirical evidence highlighting the payoffs of information and communications technologies, when properly integrated and applied, especially in enhancing the life chances of underserved Americans. Policy next steps should advance the goals of expanding universal service initiatives, including hastening broadband deployment to homes and learning institutions, and deepening programs which leverage the utility of the existing infrastructure, such as expanding human-capital development, producing relevant content, and innovating socially beneficial technology applications.  相似文献   

Assessment of Middle Ear Anatomy Teaching Methodologies Using Microscopy versus Endoscopy: A Randomized Comparative Study     

Lukas Anschuetz  Sören Huwendiek  Daniel Stricker  Abraam Yacoub  Wilhelm Wimmer  Marco Caversaccio 《Anatomical sciences education》2019,12(5):507-517

Teaching methodologies for the anatomy of the middle ear have not been investigated greatly due to the middle ear’s highly complex structure and hidden location inside of the temporal bone. The aim of this randomized study was to quantitatively compare the suitability of using microscope- and endoscope-based methods for teaching the anatomy of the middle ear. We hypothesize that the endoscopic approach will be more efficient compared to the microscopic approach. To answer the study questions, 33 sixth-year medical students, residents and otorhinolaryngology specialists were randomized either into the endoscopy or the microscopy group. Their anatomical knowledge was assessed using a structured anatomical knowledge test before and after each session. Each participant received tutoring on a human cadaveric specimen using one of the two methods. They then performed a hands-on dissection. After 2–4 weeks, the same educational curriculum was repeated using the other technique. The mean gains in anatomical knowledge for the specialists, residents, and medical students were +19.0%, +34.6%, and +23.4%, respectively. Multivariate analyses identified a statistically significant increase in performance for the endoscopic method compared to the microscopic technique (P < 0.001). For the recall of anatomical structures during dissection, the endoscopic method outperformed the microscopic technique independently of the randomization or the prior training level of the attendees (P < 0.001). In conclusion, the endoscopic approach to middle ear anatomy education is associated to an improved gain in knowledge as compared to the microscopic approach. The participants subjectively preferred the endoscope for educational purposes.  相似文献   

Biowatch South Africa and the challenges in enforcing its constitutional right to access to information     

Wilhelm Peekhaus 《Government Information Quarterly》2011,28(4):542-552

This paper examines the difficulties encountered by Biowatch, a South African civil society environmental organization, in its attempts to obtain access to government information in respect of genetically engineered plants. After establishing the context of South Africa's access to information regime, including a brief discussion of several of its weaknesses, the paper engages in an extended account of the Biowatch case as an exemplar of some of the more pronounced challenges to the effective implementation of the country's access to information legislation. The elaboration of the case is based on interviews conducted with the Director of Biowatch and counsel from the Legal Resources Centre that aided Biowatch, as well as various internal and court documents provided by Biowatch and its lawyers.  相似文献   

Book reviews     

Walter Hahn  Guy Cellerier  Wolfgang Wilhelm  Jindra Kulich  Robert J. Havighurst  Bryan T. Peck  Annegret Körner  Rodney Skager  Renate Nestvogel  J. H. Sislian  John J. Bergen  Peter W. Kahl  Tony Bates 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》1978,24(4):523-544

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Editorial preface     

Wilhelm F. Kempf  Manfred Lehrke 《Studies in Educational Evaluation》1975,1(2):63

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A mixed methods comparison of teachers' lunar modeling lesson implementation and student learning outcomes     

Mary F. Lamar  Dr. Jennifer Anne Wilhelm  Merryn Cole 《The Journal of educational research》2018,111(1):108-123

The authors compare three teachers' adaptations and implementation of a lunar modeling lesson to explain marked differences in student learning outcomes on a spatial-scientific lunar assessment. They used a modified version of the Practices of Science Observation Protocol (P-SOP; Forbes, Biggers, &; Zangori, 2013 Forbes C., Biggers, M., &; Zangori, L. (2013). Investigating essential characteristics of scientific practices in elementary science learning environments: The practices of science observation protocol (P-SOP). School Science and Mathematics, 113, 180–190.[Crossref] , [Google Scholar]) to identify ways in which features of inquiry were emphasized in each classroom. Additionally, classroom communities of practice were categorized as task-based or practice-based (Riel &; Polin, 2004 Riel, M. &; Polin, L. (2004). Learning communities: Common ground and critical differences in designing technical support. In S. Barab, R. Kling, &; J. Gray (Eds.), Designing for virtual communities in the service of learning (pp. 16–52). Cambridge, MA: Cambridge University Press.[Crossref] , [Google Scholar]). The authors found that student learning outcomes were related to the fidelity with which the teachers implemented the lesson. Teachers with higher P-SOP scores fostered more of a practice-based learning community than task-based one, which also paralleled greater student learning gains. Although the students' scores did not differ by teacher on the preassessment, they did differ significantly on the postassessment, indicating that the curricular choices and learning communities developed by the teachers impacted what students were able to learn.  相似文献   

A Framework for Designing and Evaluating Virtual Seminars     

Helmut Felix Friedrich  Aemilian Hron  & Friedrich Wilhelm Hesse 《European Journal of Education》2001,36(2):157-174

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PREFERENCES AND ASSESSMENT OF MATHEMATICALLY HIGHLY ABLE YOUNG STUDENTS     

Wilhelm Wieczerkowski  Jan Poerschke 《High Ability Studies》1994,5(1):49-57

Giftedness is commonly regarded as potential for extraordinary performance within a given area, e.g. academic, artistic, or manual, that develops in a field of interacting internal and external factors and unfolds in individual stages. Gender related and culturally dependent influences affect the dynamic processes through which a child acquires and expands its competence. Admittedly, a particular talent for a special intellectual activity, e.g. mathematics and sciences, is essential, but such a talent alone is not necessarily sufficient to explain why young students devote themselves to particular subject matter, thereby acquiring a high level of ability.

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Change in Fluid and Crystallized Intelligence and Student Achievement: The Role of Intellectual Engagement          下载免费PDF全文

Gizem Hülür  Fidan Gasimova  Alexander Robitzsch  Oliver Wilhelm 《Child development》2018,89(4):1074-1087

Intellectual engagement (IE) refers to enjoyment of intellectual activities and is proposed as causal for knowledge acquisition. The role of IE for cognitive development was examined utilizing 2‐year longitudinal data from 112 ninth graders (average baseline age: 14.7 years). Higher baseline IE predicted higher baseline crystallized ability but not changes therein, and was not associated with fluid ability. Furthermore, IE predicted change in school grades in language but not in mathematics grades or in standardized tests. These findings suggest that IE is not a major predictor of knowledge acquisition in adolescence, where degree of self‐determination in intellectual behaviors may be relatively limited. Open questions for future research are addressed, including reciprocal longitudinal associations between IE and academic and cognitive development.  相似文献