2,326 research outputs found
Support interference of wind tunnel models: A selective annotated bibliography
This bibliography, with abstracts, consists of 143 citations arranged in chronological order by dates of publication. Selection of the citations was made for their relevance to the problems involved in understanding or avoiding support interference in wind tunnel testing throughout the Mach number range. An author index is included
The Threads that Bind Us: Researching Nineteenth Century Weaving Drafts from the Dahlonega Library Archives
Handwritten weaving drafts dating back to 1832 were recently found in the Lumpkin County Library in Dahlonega, Georgia. Sallie Sorohan, a local historian, found them while sorting through papers, notes, and receipts in the Lorenzo Dow Davis collection. Local weavers, historians, and weaving students at the University of North Georgia, collaborated to translate the drafts in order to be useful in the 21st century. The current weaving professor at the University of North Georgia, Jo-Marie Karst, as well as professor emeritus, Tommye Scanlin, combined efforts to apply the knowledge gathered from Barbara Miller, instructor at John C. Campbell Folk School, and Deb Schillo, librarian at the Southern Highland Craft Guild, to involve UNG students. They read the translated drafts and wove a traditional as well as a modern sample of the patterns by Susan Davis. Their work was exhibited at the Hansford Hall Gallery on the Dahlonega campus in the Fall of 2014. This paper delves into the combined research of past and present weavers, making threads that bind together the legacy of weavers for more than a century
The Legends of Saint Augustine of Canterbury: The Myth Illuminates the Man
At the behest of Pope Gregory the Great (c. 540- 604), Augustine (later called Augustine of Canterbury) embarked on a mission that would end with Britain reentering the Christian fold. Most historical records record Augustine\u27s deeds, but say little directly his character or his personality. This paper examines some indirect inferences we can gather from legends and traditions, in the hope of producing a better understanding of Augustine the man, that we might properly understand his deeds in the context of a living, breathing person. The paper also explores the plausibility of these legends
The Threads That Bind Us: An Account Of The Research Process Of Nineteenth Century Weaving Drafts From The Dahlonega Library Archives
Handwritten weaving drafts dating back to 1832 were recently found in the Lumpkin County Library in Dahlonega, Georgia. Sallie Sorohan, a local historian, found them while sorting through papers, notes, and receipts in the Lorenzo Dow Davis collection. In a collaboration of local weavers, historians, and weaving students at the University of North Georgia, the drafts were translated in order to be useful in the 21st century with the help of Barbra Miller and Deb Schillo. The current weaving professor at the University of North Georgia, Jo-Marie Karst, as well as the past, Tommye Scanlin, combined efforts to apply the knowledge gathered from Miller and Schillo and get the students involved. The students were able to read the translated drafts and weave a traditional as well as a modern sample of the patterns by Susan Davis. Their work was exhibited at the Hansford Hall Gallery on the Dahlonega campus in Fall 2014. This paper delves into the research of combined efforts of past and present weavers, making threads that bind together the legacy of weavers for more than a century
Preservice Teacher Preparation in International Contexts: A Case-Study Examination of the International Student Teacher Programs
This article examines the teacher preparation experiences of preservice teachers in six international contexts: China, Fiji, Kiribati, Mexico, Samoa, and Tonga. More specifically, it looks at the value-added components in an international teacher education program, with an emphasis on effective teaching and employability. Theoretically the study is based on Straus and Corbinâs (1998a) substantive grounded theory and Pattonâs (1997) Theory of Action Framework. Verbal and non-verbal forms of feedback were identified as essential aspects of the international preservice training experience. Cultural diversity, teaching English as a second language, collaboration, and exposure to a different educational system were identified among several components as advantages to individuals who conduct their preservice teacher training in international settings.</jats:p
Experimentally Constrained Molecular Relaxation: The case of hydrogenated amorphous silicon
We have extended our experimentally constrained molecular relaxation
technique (P. Biswas {\it et al}, Phys. Rev. B {\bf 71} 54204 (2005)) to
hydrogenated amorphous silicon: a 540-atom model with 7.4 % hydrogen and a
611-atom model with 22 % hydrogen were constructed. Starting from a random
configuration, using physically relevant constraints, {\it ab initio}
interactions and the experimental static structure factor, we construct
realistic models of hydrogenated amorphous silicon. Our models confirm the
presence of a high frequency localized band in the vibrational density of
states due to Si-H vibration that has been observed in a recent vibrational
transient grating measurements on plasma enhanced chemical vapor deposited
films of hydrogenated amorphous silicon.Comment: 13 pages, 4 figure
Urinary excretion of RAS, BMP, and WNT pathway components in diabetic kidney disease.
Abstract The renin-angiotensin system (RAS), bone morphogenetic protein (BMP), and WNT pathways are involved in pathogenesis of diabetic kidney disease (DKD). This study characterized assays for urinary angiotensinogen (AGT), gremlin-1, and matrix metalloproteinase 7 (MMP-7), components of the RAS, BMP, and WNT pathways and examined their excretion in DKD. We measured urine AGT, gremlin-1, and MMP-7 in individuals with type 1 diabetes and prevalent DKD (n = 20) or longstanding (n = 61) or new-onset (n = 10) type 1 diabetes without DKD. These urine proteins were also quantified in type 2 DKD (n = 11) before and after treatment with candesartan. The utilized immunoassays had comparable inter- and intra-assay and intraindividual variation to assays used for urine albumin. Median (IQR) urine AGT concentrations were 226.0 (82.1, 550.3) and 13.0 (7.8, 20.0) ÎŒg/g creatinine in type 1 diabetes with and without DKD, respectively (P < 0.001). Median (IQR) urine gremlin-1 concentrations were 48.6 (14.2, 254.1) and 3.6 (1.7, 5.5) ÎŒg/g, respectively (P < 0.001). Median (IQR) urine MMP-7 concentrations were 6.0 (3.8, 10.5) and 1.0 (0.4, 2.9) ÎŒg/g creatinine, respectively (P < 0.001). Treatment with candesartan was associated with a reduction in median (IQR) urine AGT/creatinine from 23.5 (1.6, 105.1) to 2.0 (1.4, 13.7) ÎŒg/g, which did not reach statistical significance. Urine gremlin-1 and MMP-7 excretion did not decrease with candesartan. In conclusion, DKD is characterized by markedly elevated urine AGT, MMP-7, and gremlin-1. AGT decreased in response to RAS inhibition, suggesting that this marker reflects therapeutic response. Urinary components of the RAS, BMP, and WNT pathways may identify risk of DKD and aid development of novel therapeutics
Defect structures in metallic photonic crystals
Cataloged from PDF version of article.We have investigated metallic photonic crystals built around a layerâbyâlayer geometry. Two different crystal structures (faceâcenteredâtetragonal and tetragonal) were built and their properties were compared. We obtained rejection rates of 7â8 dB per layer from both metallic crystals. Defect modes created by removing rods resulted in high peak transmission (80%), and high quality factors (1740). Our measurements were in good agreement with theoretical simulations.
© 1996 American Institute of Physic
Resonant cavity enhanced detectors embedded in photonic crystals
Cataloged from PDF version of article.We report a resonant cavity enhanced (RCE) detector built around a three-dimensional photonic band gap crystal. The RCE detector was built by placing a monopole antenna within the localized modes of planar and boxlike defectstructures. The enhanced electric field around these defectstructures were then measured by a microwave detector and a network analyzer. We measured a power enhancement factor of 3450 for planar cavity structures. A FabryâPerot cavity model was used to understand and predict resonant cavity enhancement in this structure. The tuning bandwidth of the RCE detector extends from 10.5 to 12.8 GHz, which corresponds to the full photonic band gap by the crystal. These RCE detectors have increased sensitivity and efficiency when compared to conventional detectors, and can be used for various applications.
© 1998 American Institute of Physic
Model checking boot code from AWS data centers
© 2020, The Author(s). This paper describes our experience with symbolic model checking in an industrial setting. We have proved that the initial boot code running in data centers at Amazon Web Services is memory safe, an essential step in establishing the security of any data center. Standard static analysis tools cannot be easily used on boot code without modification owing to issues not commonly found in higher-level code, including memory-mapped device interfaces, byte-level memory access, and linker scripts. This paper describes automated solutions to these issues and their implementation in the C Bounded Model Checker (CBMC). CBMC is now the first source-level static analysis tool to extract the memory layout described in a linker script for use in its analysis
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