The timekeeping of Egyptian outflow clocks     

John H Fermor  Arthur E Burgess  Victor Przybylinski 《Endeavour》1983,7(3):133-136

Simple as the outflow clock principle may seem for the measurement of time, its translation into an accurate clock raises formidable technical and conceptual problems. An attempt is made here to reconstruct the Egyptians' consciousness of these problems, and the success of their solutions.  相似文献   

VIII. THE SITUATION FOR CHILDREN WITHOUT PARENTAL CARE AND STRATEGIES FOR POLICY CHANGE     

Patrice L. Engle  Victor K. Groza  Christina J. Groark  Aaron Greenberg  Kelley McCreery Bunkers  Rifkat J. Muhamedrahimov 《Monographs of the Society for Research in Child Development》2011,76(4):190-222

Research that clearly demonstrates the negative effects of institutionalization, particularly for young children, has been critical for changing policy. However, actually putting science into action requires advocacy, persistence, and perseverance. Policy makers and advocates must be informed about the research and use it effectively. This paper proposes a number of key components for translating research into policy and programs: analyzing the situation, using evidence to build the case for action, developing policies, building program capacity in child welfare and early childhood development, creating a family‐based child welfare system, and developing a system of monitoring and accountability. Much of the knowledge in this paper comes from experiences, desk reviews, and case studies of successful practices. Research provides the basis, but moving research to practice depends on collaboration between researchers who understand the key policy perspectives and policy makers who understand the research.  相似文献   

An empirical study on the determinants of essential patent claims in compatibility standards     

Rudi Bekkers  René Bongard 《Research Policy》2011,40(7):1001-1015

In the field of compatibility standards, an increasing number of companies claim to own so-called essential patents (i.e. those patents that are indispensable for designing and manufacturing products conforming to the standard). It is widely believed that the ownership of such patents is a very valuable bargaining tool in cross-license negotiations, while for non-producing firms such patents may result in a substantial stream of licensing revenues. In this paper we study the determinants of essential patent claims in compatibility standards. In particular, we assess the role of two main factors: the significance of the technological solution contained in the patent and the involvement of the applicant of the patent in the standardisation process. We examine the case of W-CDMA, one of the most successful standards in mobile telecommunications. We compare the patents claimed essential for this standard with a control group of randomly selected, unclaimed patents covering the same time period and technology classes. We find empirical evidence that both factors have significant impact on the probability that a patent is claimed as essential, but the involvement in the standardisation process is a stronger determinant than the technical value (‘merit’) of the patent. On the basis of our findings, we offer policy recommendations.  相似文献   

Identifying the Content,Lesson Structure,and Data Use Within Pre-collegiate Data Science Curricula     

Lee  Victor R.  Delaney  Victoria 《Journal of Science Education and Technology》2022,31(1):81-98

Journal of Science Education and Technology - As data become more available and integrated into daily life, there has been growing interest in developing data science curricula for youth in...  相似文献   

He Knows He Has Wings     

Victor Hugo 《新高考》2014,(4):1-1

何必去管它,人生总是无定？ 有什么关系壮志难成？ 又何必计较你蹉跌并败奔——  相似文献   

On Some Paradoxes of the Infinite II     

Allis  Victor; Koetsier  Teun 《The British journal for the philosophy of science》1995,46(2):235-247

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Cross-cultural differences in attitudes towards disabled persons: A study of Jewish and Arab youth in Israel     

Victor Florian 《Int J Intercult Relat》1982,6(3):291-299

Cultural values may be seen as the primary determinants of altitudes towards deviant or exceptional persons. The present study deals with the attitudes of Jewish and Arab youth in Israel towards the disabled as a function of cultural identity, existence of contact with a disabled person, and type of disability (blindness, amputation, facial disfigurement, or confinement to a wheelchair).A sample of 510 Jews and 655 Arabs filled out the Yuker Altitudes Towards Disabled Persons Scale (ATDP). The results indicated that overall, Jews were more positive towards the disabled than Arabs. Furthermore, the existence of previous contact with a disabled person was a positive factor in the formation of the Jews' attitudes, and a negative factor for the Arabs. In their ranking of different types of disability, Jews and Arabs differed significantly.The results are interpreted in the context of modern versus traditional cultures, whereby the Jewish youths' more tolerant Western approach seems to engender a more positive attitude than the Arab youths' conservative values.  相似文献   

TEACHING PHILOSOPHY OF EDUCATION TODAY     

Victor L. Worsfold 《Educational theory》2001,51(3):373-384

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Student development in junior high school science     

John F. Disinger  Victor I. Mayer 《科学教学研究杂志》1974,11(2):149-155

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Testing Measurement Invariance Across Groups in Longitudinal Data: Multigroup Second-Order Latent Growth Model     

Eun Sook Kim  Victor L. Willson 《Structural equation modeling》2013,20(4):566-576

In latent growth modeling, measurement invariance across groups has received little attention. Considering that a group difference is commonly of interest in social science, a Monte Carlo study explored the performance of multigroup second-order latent growth modeling (MSLGM) in testing measurement invariance. True positive and false positive rates in detecting noninvariance across groups in addition to bias estimates of major MSLGM parameters were investigated. Simulation results support the suitability of MSLGM for measurement invariance testing when either forward or iterative likelihood ratio procedure is applied.  相似文献