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Institution

University of Oklahoma

EducationNorman, Oklahoma, United States
About: University of Oklahoma is a education organization based out in Norman, Oklahoma, United States. It is known for research contribution in the topics: Population & Radar. The organization has 25269 authors who have published 52609 publications receiving 1821706 citations. The organization is also known as: OU & Oklahoma University.


Papers
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Journal ArticleDOI
TL;DR: In this paper, an intercomparison of various cluster techniques was carried out on a well-studied dataset (7-day precipitation data from 1949 to 1987 in central and eastern North America).
Abstract: Cluster analysis (CA) has been applied to geophysical research for over two decades although its popularity has increased dramatically over the past few years. To date, systematic methodological reviews have not appeared in geophysical literature. In this paper, after a review of a large number of applications on cluster analysis, an intercomparison of various cluster techniques was carried out on a well-studied dataset (7-day precipitation data from 1949 to 1987 in central and eastern North America). The cluster methods tested were single linkage, complete linkage, average linkage between groups, average linkage within a new group, Ward's method, k means, the nucleated agglomerative method, and the rotated principal component analysis. Three different dissimilarity measures (Euclidean distance, inverse correlation, and theta angle) and three initial partition methods were also tested on the hierarchical and nonhierarchical methods, respectively. Twenty-two of the 23 cluster algorithms yielded na...

355 citations

Journal ArticleDOI
TL;DR: HRT and raloxifene lower serum homocysteine levels to a comparable extent in postmenopausal women, and the relationship between elevated C-reactive protein levels with HRT and cardiovascular disease events requires further study.
Abstract: C-Reactive protein and homocysteine are independent risk factors for the development of cardiovascular disease. This study compared the effects of hormone replacement therapy (HRT) and raloxifene on serum C-reactive protein and homocysteine levels as markers of cardiovascular risk in healthy postmenopausal women. Healthy postmenopausal women (n = 390) were enrolled in a double blind, randomized, placebo-controlled, 6-month trial at eight out-patient sites in the United States. Women were randomly assigned to receive continuous combined HRT (0.625 mg/day conjugated equine estrogen and 2.5 mg/day medroxyprogesterone acetate), raloxifene (60 or 120 mg/day), or placebo for 6 months. C-Reactive protein and homocysteine were measured in baseline and 6-month serum samples. HRT increased C-reactive protein levels by 84% (P 0.2). Raloxifene (60 and 120 mg/day) significantly lowered serum levels of homocystein...

354 citations

Journal ArticleDOI
TL;DR: Apatite dissolution and solubility in the peraluminous haplogranite system were investigated in three sets of experiments at 750°C and 200 MPa (PH2o), as functions of Ap grain size, abundance (melt: Ap ratio), and melt ASI [alumina saturation index: mol. as mentioned in this paper.

354 citations

Journal ArticleDOI
Ji Hong1
TL;DR: This paper explored differences between leavers and stayers in terms of the process of their resilience responses and found that leavers showed weaker self-efficacy beliefs than stayers, who tended to get more support and help from school adminis...
Abstract: With the increasing concern about the high attrition rate among beginning teachers, it is essential that we come to a better understanding of why teachers leave the profession. This study explored differences between leavers and stayers in terms of the process of their resilience responses. Major psychological factors such as value, self-efficacy, beliefs and emotions were foregrounded to understand how leavers and stayers are similar or different in negotiating and interpreting external environments. This study employed semi-structured interviews for seven leavers and seven stayers who had teaching experiences of less than five years. The findings of this study showed that both leavers and stayers had intrinsic interests in working as a teacher. Also, both groups identified similar challenges of working as a teacher, such as classroom management and effective delivery of lessons. However, leavers showed weaker self-efficacy beliefs than stayers, who tended to get more support and help from school adminis...

353 citations

Journal ArticleDOI
TL;DR: In this article, numerical methods and algorithms for the solution of NLTE stellar atmosphere problems involving expanding atmospheres, e.g., found in novae, supernovae and stellar winds, are discussed.

353 citations


Authors

Showing all 25490 results

NameH-indexPapersCitations
Ronald C. Kessler2741332328983
Michael A. Strauss1851688208506
Derek R. Lovley16858295315
Ashok Kumar1515654164086
Peter J. Schwartz147647107695
Peter Buchholz143118192101
Robert Hirosky1391697106626
Elizabeth Barrett-Connor13879373241
Brad Abbott137156698604
Lihong V. Wang136111872482
Itsuo Nakano135153997905
Phillip Gutierrez133139196205
P. Skubic133157397343
Elizaveta Shabalina133142192273
Richard Brenner133110887426
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202392
2022348
20212,425
20202,481
20192,433
20182,396