196,656 research outputs found
Oral history interview with Art Bieri
No full textArt Bieri was born in New York City and grew up in New Jersey, where he learned to swim in the Atlantic Ocean. He carried his love for athletics into the military service in Korea, where he organized recreation and entertainment for the troops. After being rotated back to the Air Force base in Altus, Oklahoma, he met his future wife Alvena Brillhart, who later taught in the English department at Oklahoma State University. Both attended Oklahoma A&M College, and Bieri used his GI benefits to complete a master's degree in physical education, studying under A. B. Harrison and Valerie Colvin. He first worked as a teacher and physical education director in Stillwater, making the schools' programs among the most innovative in the state. Bieri was employed with the Stillwater Public Schools for 28 years, 1959 to 1986
Oral history interview with Arthur Peter Bieri
No full textArthur Bieri, a 1958 graduate of Oklahoma A&M College (OAMC) with a bachelor's degree in elementary education, returned to Oklahoma State University (formally OAMC) and earned a master's degree in physical education. Bieri discusses his path to college, taking classes from icons such as Henry Iba and Valerie Colvin. He also talks about his 28 years with Stillwater Public Schools and the importance of physical education.The O-STATE Stories Oral History collection is comprised of interviews which chronicle the rich history, heritage, and traditions of Oklahoma State University
Fruit tree ecosystem service provision and enhancement.
No full textThe paper deals with the qualitative valuation of services provided by fruit tree ecosystems in an ecological engineering context. Thereby, the state and spatial occurrence of various fruit tree species and varieties are assessed, the services that they confer to people are evaluated, and recommendations are made on strategies aiming at enhancing their services. In the community of Vaduz, principality of Liechtenstein, the position of 1445 fruit trees including 77 small apple plantations with modern varieties has been recorded. Experts identified 200 apple and 59 pear varieties, and assigned the fruits to one of three quality and rareness categories. The diversity of apple is higher than the diversity of pears, and there are indications for a high diversity of the Prunus spp. The current 720 patches on agricultural land are composed of 361 trees, some small apple plantations, and 359 hedgerow point measurements; display 258 840 connections and yield connectivity indices for dispersal coefficients of little mobile birds and butterflies, respectively. Four strategies to place 75 additional trees for connectivity enhancement have been evaluated. They all lead to higher overall connectivity relative to the current connectivity, but the establishment of an orchard provides the highest gain in relative connectivity. The second best result is obtained by randomly placing the trees into open agricultural land. The strategy of planting the trees for shade provision along roads and paths yields a result similar to a strategy with placement of trees on transects through open agricultural land. The strategy of planting trees along paths and roads is preferred since interference with agricultural activities is smallest. In a metapopulation context, the connectivity for representative taxa should be seen as a necessary but insufficient parameter for species conservation purposes in particular and biodiversity augmentation in general
Clinical and social judgment The discrimination of behavioral information. James Bieri a. o.
No full textThe Sigma invariants of Thompson's group F
No full textConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Thompson's group F is the group of all increasing dyadic PL homeomorphisms of the closed unit interval. We compute Sigma(m)(F) and Sigma(m)(F;Z), the homotopical and homological Bieri-Neumann-Strebel-Renz invariants of F, and show that Sigma(m)(F) = Sigma(m)(F;Z). As an application, we show that, for every m, F has subgroups of type F(m-1) which are not of type FP(m) (thus certainly not of type F(m)).42263273Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq
Rapid magnetic resonance tissue relaxometry in the steady state
No full textLongitudinal (T1) and transverse (T2) relaxation are the most fundamental physical processes governing the signal intensity and the soft tissue contrast in magnetic resonance imaging (MRI). The T1 and T2 relaxation times are characteristic properties of living tissues and they were observed to be altered in the context of several diseases. Commonly, the MR images acquired in the clinical routine for medical assessment provide qualitative rather than quantitative information about the T1 and T2 relaxation times of the tissues of interest. The signal intensity generated by conventional qualitative MR imaging may be predominantly T1- or T2-weighted but is generally dependent on other tissue-specific parameters such as the proton density, the acquisition protocol, and the used MR hardware.
It is beneficial to directly measure the T1 and T2 relaxation times by acquiring typically two or more MR images of the same anatomical region but of different contrasts and to represent the results in quantitative maps. While these maps have the same structural appearance as the acquired base images, the individual pixel values have a physical meaning (i.e. the values of T1 and T2 in milliseconds) instead of displaying the signal intensity in arbitrary units. Quantitative maps of tissue-specific MR parameters are superior to conventional MR images since they are ideally independent of the MR protocol and hardware, and thus offer the possibility to directly compare the results from studies across multiple subjects, time-points, and imaging sites. Relaxation time measurements (also referred to as relaxometry) have demonstrated increased specificity and sensitivity to detect pathological tissue changes compared to conventional T1- and T2-weighted MR imaging.
In practice, T1 and T2 quantification techniques which are based on the acquisition of purely T1- and T2-weighted images without residual sensitivity on T2 and T1, respectively, require prohibitively long scan times making them not suited for the clinical practice. As a consequence, fast MR imaging using steady-state free precession (SSFP) sequences has come into the research focus of quantitative MRI. The images obtained from SSFP acquisitions show generally a mixed T1 and T2 contrast. Contemporary SSFP-based techniques for relaxation time measurements are impaired by a T2-related bias in the T1 quantification and by a T1-related bias in the T2 quantification. In addition, their speed comes at the expense of increased sensitivity to extrinsic instrumental factors (e.g. static or transmit field inhomogeneities).
In this thesis, new robust SSFP-based relaxometry methods are developed which offer clinically acceptable scan times and considerably reduce or even eliminate the T2- and T1-bias in the T1 and T2 calculation, respectively, of targets such as the human brain and the musculoskeletal system
Ecosystem analysis concepts and methodologies for the design of integrated disease and resource management schemes in Sub-Saharan Africa
No full textDr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Tupaju - der gelbe Gott. Farbwahrnehmung und Farbnutzung am Beispiel der Guaraní Südamerikas
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