Academic literature on the topic 'Vernon, B.C'
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Journal articles on the topic "Vernon, B.C"
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Chauhan, Mohinder S., Manita Sharma, Kishore C. Sharma, K. Ashwini, and Suvarcha Chauhan. "Viscosity Studies of Some Electrolytes in Dimethyl Sulfoxide and N,N-Dimethylformamide at Different Temperatures." Collection of Czechoslovak Chemical Communications 60, no. 1 (1995): 55–64. http://dx.doi.org/10.1135/cccc19950055.
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The limiting molar conductivity Λ0 and the Jones-Dole viscosity coefficients A and B were measured for Ph4PBPh4, Bu4NBPh4, Bu4NClO4, Ph4PBr, Bu4NBr, NaBPh4, NaClO4, KClO4, LiClO4 and AgClO4 in pure DMF and DMSO at 20, 30 and 40 °C. The experimental coefficients A are compared with the coefficients A calculated from the Falkenhagen-Vernon equation. The ionic viscosity coefficients B, which were obtained using Ph4PBPh4 as the reference electrolyte, are discussed in terms of the contributions in the expression: Bion = Bw + Bsolv + Bord + Bdisord + Bshape.
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Pfau, Russell S., Jim R. Goetze, Robert E. Martin, Kenneth G. Matocha, and Allan D. Nelson. "Spatial and temporal genetic diversity of the Texas kangaroo rat, Dipodomys elator (Rodentia: Heteromyidae)." Journal of Mammalogy 100, no. 4 (June 8, 2019): 1169–81. http://dx.doi.org/10.1093/jmammal/gyz090.
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Abstract The Texas kangaroo rat (Dipodomys elator) is listed as a threatened species in Texas because of its scarcity and small geographic range. We assessed patterns of genetic diversity in D. elator that could affect extinction risk or influence management decisions. Specific objectives included: 1) document levels of genetic diversity, 2) document the degree and patterns of genetic divergence among localities, and 3) compare levels of genetic diversity between different time periods at the same locality. Portions of the mitochondrial genome (mtDNA; control region, cytochrome c oxidase subunit I, and cytochrome b) were sequenced and nuclear microsatellites were examined. Low mtDNA diversity was observed, which could be explained by an historical, species-wide genetic bottleneck. In contrast, microsatellites exhibited ample variation, and analyses were conducted using data from 11 loci and four populations (designated Quanah, Iowa Park, Vernon, and Harrold). Allelic diversity and heterozygosity were similar between populations and temporal samples. Estimates of effective population size (Ne) ranged from 5 to 856, depending on method and population, with Iowa Park showing consistently lower values than Quanah. All methods addressing population structure indicated that the Iowa Park population was divergent from the others, with Vernon and Harrold showing a somewhat intermediate relationship but with a closer affiliation with Quanah than Iowa Park, despite their closer proximity to Iowa Park. This pattern did not conform to isolation by distance, thus genetic drift appears to have played a greater role than gene flow in establishing genetic structure. There was much less difference between temporal samples compared to geographic samples, indicating that genetic drift has had only minimal impacts in shifting allelic frequencies over the time periods examined (17–36 years).
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Kolocotroni, Vassiliki. "Cavafy among the Modernists." boundary 2 48, no. 2 (May 1, 2021): 59–87. http://dx.doi.org/10.1215/01903659-8936684.
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Placing C. P. Cavafy among the modernists raises interesting questions. Which century can claim Cavafy? What does it mean to claim Cavafy for modernism? What space do we need to make for Cavafy in an approach to modernism that shapes and is shaped by his work? What re- and disorientations might that positioning require? Which nineteenth-century filiations does Cavafy carry over into his modernism? Is courage rather than contemporaneity a better guide in these orienteering exercises? This essay fleshes out these questions, asks a few more in the process, and attempts a set of triangulations and mediations between Cavafian and early twentieth-century words and worlds. This is not to trace influences or deep affinities but to deploy Cavafy as the “century's interlocutor,” in Paul's immodest but resonant phrase. Among the mediating or triangulated figures are F. T. Marinetti, E. M. Forster, T. S. Eliot, George Seferis, Ezra Pound, W. B. Yeats, Vernon Lee, and Pierre Louÿs, with cameo appearances by Bertolt Brecht, Arthur Rimbaud, and Eugène Marsan.
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Engstrom, John W. "Spinal cord medicine: Principles and practice, edited by Vernon W. Lin, Diana D. Cardenas, Nancy C. Cutter, Frederick S. Frost, Margaret C. Hammond, Laurie B. Lindblom, Inder Perkash, Robert Waters, and Robert M. Woolsey, 1043 pp., ill., New York, Demos Medical Publishing, Inc., 2003, $225." Muscle & Nerve 29, no. 3 (2004): 456. http://dx.doi.org/10.1002/mus.10561.
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Martínez Cruz, Eliel, Espitia Rangel Eduardo, Héctor Eduardo Villaseñor Mir, René Hortelano Santa Rosa, María Florencia Rodríguez García, and Roberto Javier Peña Bautista. "Las combinaciones de gluteninas de los loci Glu-1 y Glu-3 y la calidad de la masa en trigo harinero." Revista Mexicana de Ciencias Agrícolas 4, no. 8 (April 23, 2018): 1139–49. http://dx.doi.org/10.29312/remexca.v4i8.1128.
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Se estudió el efecto de las combinaciones de gluteninas de alto peso molecular (GAPM) y gluteninas de bajo peso molecular (GBPM) sobre la calidad (fuerza y extensibilidad) de la masa. Se utilizaron tres grupos de 98 líneas, derivadas de Verano S91 x Salamanca S75, Verano S91 x Gálvez M87 y Rebeca F2000 x Bacanora T88. Las variables evaluadas fueron: tiempo y estabilidad al amasado, tolerancia al sobre amasado, fuerza de la masa y la relación tenacidad/ extensibilidad. Las GAPM y GBPM Se identificaron mediante electroforesis en geles de poliacrilamida. En Verano S91 x Salamanca S75, las GAPM 2*, 17+18, 2+12 combinadasconlasGBPMe,g?,b;c,h,byc,g?,bse asociaron con masas de mayor fuerza respecto a 2*, 17+18, 2+12, e, h, b. En Verano S91 x Gálvez M87, 2*, 17+18, 2+12, e, h, c; 1, 17+18, 2+12, b, h, c y 1, 17+18, 2+12, b, h, b presentaron gluten medio fuerte y extensible. En Rebeca F2000 x Bacanora T88, 2*, 7+9, 5+10, c. g, b y 1, 17+18, 5+10, c, g, b mostraron gluten fuerte y extensible, contrario a lo expresado por 2*, 7+9, 5+10, c. j, b. Lo anterior indica que mediante la recombinación genética se pueden generar y seleccionar combinaciones de GAPM y GBPM que se asocian a valores específicos de fuerza y extensibilidad y consecuentemente definen la calidad del producto final.
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TYBJERG, KARIN. "J. LENNART BERGGREN and ALEXANDER JONES, Ptolemy'sGeography: An Annotated Translation of the Theoretical Chapters. Princeton and Oxford: Princeton University Press, 2000. Pp. xiii+192. ISBN 0-691-01042-0. £24.95, $39.50 (hardback)." British Journal for the History of Science 37, no. 2 (May 24, 2004): 193–96. http://dx.doi.org/10.1017/s0007087404215813.
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J. Lennart Berggren and Alexander Jones, Ptolemy's Geography: An Annotated Translation of the Theoretical Chapters. By Karin Tybjerg 194Natalia Lozovsky, ‘The Earth is Our Book’: Geographical Knowledge in the Latin West ca. 400–1000. By Evelyn Edson 196David Cantor (ed.), Reinventing Hippocrates. By Daniel Brownstein 197Peter Dear, Revolutionizing the Sciences: European Knowledge and Its Ambitions, 1500–1700. By John Henry 199Paolo Rossi, Logic and the Art of Memory: The Quest for a Universal Language. By John Henry 200Marie Boas Hall, Henry Oldenburg: Shaping the Royal Society. By Christoph Lüthy 201Richard L. Hills, James Watt, Volume 1: His Time in Scotland, 1736–1774. By David Philip Miller 203René Sigrist (ed.), H.-B. de Saussure (1740–1799): Un Regard sur la terre, Albert V. Carozzi and John K. Newman (eds.), Lectures on Physical Geography given in 1775 by Horace-Bénédict de Saussure at the Academy of Geneva/Cours de géographie physique donné en 1775 par Horace-Bénédict de Saussure à l'Académie de Genève and Horace-Bénédict de Saussure, Voyages dans les Alpes: Augmentés des Voyages en Valais, au Mont Cervin et autour du Mont Rose. By Martin Rudwick 206Anke te Heesen, The World in a Box: The Story of an Eighteenth-Century Picture Encyclopedia. By Richard Yeo 208David Boyd Haycock, William Stukeley: Science, Religion and Archaeology in Eighteenth-Century England. By Geoffrey Cantor 209Jessica Riskin, Science in the Age of Sensibility: The Sentimental Empiricists of the French Enlightenment. By Dorinda Outram 210Michel Chaouli, The Laboratory of Poetry: Chemistry and Poetics in the Work of Friedrich Schlegel. By David Knight 211George Levine, Dying to Know: Scientific Epistemology and Narrative in Victorian England. By Michael H. Whitworth 212Agustí Nieto-Galan, Colouring Textiles: A History of Natural Dyestuffs in Industrial Europe. By Ursula Klein 214Stuart McCook, States of Nature: Science, Agriculture, and Environment in the Spanish Caribbean, 1760–1940. By Piers J. Hale 215Paola Govoni, Un pubblico per la scienza: La divulgazione scientifica nell'Italia in formazione. By Pietro Corsi 216R. W. Home, A. M. Lucas, Sara Maroske, D. M. Sinkora and J. H. Voigt (eds.), Regardfully Yours: Selected Correspondence of Ferdinand von Mueller. Volume II: 1860–1875. By Jim Endersby 217Douglas R. Weiner, Models of Nature: Ecology, Conservation and Cultural Revolution in Soviet Russia. With a New Afterword. By Piers J. Hale 219Helge Kragh, Quantum Generations: A History of Physics in the Twentieth Century. By Steven French 220Antony Kamm and Malcolm Baird, John Logie Baird: A Life. By Sean Johnston 221Robin L. Chazdon and T. C. Whitmore (eds.), Foundations of Tropical Forest Biology: Classic Papers with Commentaries. By Joel B. Hagen 223Stephen Jay Gould, I Have Landed: Splashes and Reflections in Natural History. By Peter J. Bowler 223Henry Harris, Things Come to Life: Spontaneous Generation Revisited. By Rainer Brömer 224Hélène Gispert (ed.), ‘Par la Science, pour la patrie’: L'Association française pour l'avancement des sciences (1872–1914), un projet politique pour une société savante. By Cristina Chimisso 225Henry Le Chatelier, Science et industrie: Les Débuts du taylorisme en France. By Robert Fox 227Margit Szöllösi-Janze (ed.), Science in the Third Reich. By Jonathan Harwood 227Vadim J. Birstein, The Perversion of Knowledge; The true Story of Soviet Science. By C. A. J. Chilvers 229Guy Hartcup, The Effect of Science on the Second World War. By David Edgerton 230Lillian Hoddeson and Vicki Daitch, True Genius: The Life and Science of John Bardeen, the Only Winner of Two Nobel Prizes in Physics. By Arne Hessenbruch 230Stephen B. Johnson, The Secret of Apollo: Systems Management in American and European Space Programs, John M. Logsdon (ed.), Exploring the Unknown: Selected Documents in the History of the U.S. Civil Space Program. Volume V: Exploring the Cosmos and Douglas J. Mudgway, Uplink-Downlink: A History of the Deep Space Network 1957–1997. By Jon Agar 231Helen Ross and Cornelis Plug, The Mystery of the Moon Illusion: Exploring Size Perception. By Klaus Hentschel 233Matthew R. Edwards (ed.), Pushing Gravity: New Perspectives on Le Sage's Theory of Gravitation. By Friedrich Steinle 234Ernest B. Hook (ed.), Prematurity in Scientific Discovery: On Resistance and Neglect. By Alex Dolby 235John Waller, Fabulous Science: Fact and Fiction in the History of Scientific Discovery. By Alex Dolby 236Rosalind Williams, Retooling: A Historian Confronts Technological Change. By Keith Vernon 237Colin Divall and Andrew Scott, Making Histories in Transport Museums. By Anthony Coulls 238
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Chang, K. F., R. J. Howard, and S. F. Hwang. "First Report of Botrytis Blight, Caused by Botrytis cinerea, on Coneflowers." Plant Disease 81, no. 12 (December 1997): 1461. http://dx.doi.org/10.1094/pdis.1997.81.12.1461c.
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Coneflowers (Echinacea purpurea (L.) Moench and E. pallida (Nutt.) Nutt. var. angustifolia (DC.) Cronq.) are popular medicinal herbs in North America and Europe. In May 1997, a previously undescribed disease was observed in a commercial field of 3-year-old E. pallida var. angustifolia plants in Vernon, British Columbia, Canada. Diseased plants had small to large, brown or black lesions on leaves and stems. Botrytis cinerea Pers.:Fr. (1,2) was consistently isolated from affected tissues. The pathogen appeared to infect leaves along the margins and tips, and occasionally on other parts of the blade as well. Lesions expanded rapidly under cool, humid conditions. Once the pathogen had invaded the midrib or veins, it advanced rapidly to the petiole and stem, which resulted in collapse of the leaf. The pathogen produced profuse conidia and mycelia on the surface of dead and dying leaves, stems, and blossoms, which resulted in a moldy gray appearance. Under dry conditions, the disease developed slowly or even became quiescent. Large lesions often split and formed holes in leaves. The average size of the conidia produced on naturally infected leaves ranged from 5.5 to 10.5 × 6.8 to 18.3 μm (average 8.1 × 13.0 μm), and on potato dextrose agar (1-month-old culture) ranged from 5.5 to 10.0 × 7.5 to 16.3 μm (average 7.4 × 11.3 μm) based on 100 spore measurements, respectively. Microsclerotia were round, spherical or irregular in shape, and ranged from 1.1 to 3.6 × 1.0 to 3.0 mm. Koch's postulates were verified by spraying potted, 3-month-old, narrow-leaved coneflower (E. pallida var. angustifolia) and 2-year-old purple coneflower (E. purpurea) plants with a spore suspension (4 × 105 conidia/ml). Inoculated plants were enclosed in transparent plastic bags for 7 days at 15/22°C (night/day) with a 12-h photoperiod. Typical symptoms were produced 2 to 7 days after inoculation. Some infected leaves quickly twisted and dried after removal of the plastic bags. Botrytis cinerea was reisolated from the affected tissues. This is the first report of Botrytis blight on Echinacea spp. Although B. cinerea does not usually kill coneflower plants, it often heavily infects disc flowers and young shoots. Therefore, Botrytis blight could have a significant impact on the establishment and productivity of this crop in both the field and greenhouse, especially under cool, wet, growing conditions. References: (1) J. R. Coley-Smith et al. 1980. The Biology of Botrytis. Academic Press, New York. (2) D. J. Morgan. Trans. Br. Mycol. Soc. 56:319, 1971.
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Yee, C. S., C. Gordon, M. Akil, P. Lanyon, C. J. Edwards, D. Isenberg, A. Rahman, et al. "POS0106 BILAG-2004 LDA AND BST LDA ARE VALID TREAT TO TARGET IN SLE." Annals of the Rheumatic Diseases 80, Suppl 1 (May 19, 2021): 264.1–264. http://dx.doi.org/10.1136/annrheumdis-2021-eular.10.
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Background:Low disease activity state has been defined using SLEDAI and used as treatment target in SLE. However, there has not been any such definition using BILAG-2004 index (BILAG-2004).Objectives:This study was to determine if low disease activity state according to BILAG-2004 is valid for use as treatment target in SLE. We also assessed disease activity longitudinally using BILAG-2004 systems tally (BST). BST is an alternative way of representing BILAG-2004 scores that combines the flexibility and simplification of numerical scoring of BILAG-2004 with the clinical intuitiveness of BILAG-2004 structure.Methods:This was a prospective multi-centre longitudinal study in the UK of an inception cohort of SLE patients (recruited within 12 months of achieving 1997 ACR revised criteria for SLE). Data were collected on disease activity (BILAG-2004 and BILAG2004-Pregnancy Index during pregnancy), SLICC/ACR DI (SDI), cumulative drug exposure and death at every visit. This study ran from 1st January 2005 to 31st December 2017. Four low disease activity states (LDA) were defined using BILAG-2004: 1) BILAG-2004 LDA when all 9 systems had scores of C, D or E on assessment (no Grade A or B), 2) BST LDA when there was persistent score of C, D or E in all 9 systems between 2 consecutive visits (equivalent to 2 consecutive visits with BILAG-2004 LDA), 3) BILAG-2004 Remission when all 9 systems had scores of D or E on assessment and 4) Persistent Remission when there was persistent score of D or E in all 9 systems between 2 consecutive visits. Longitudinal analysis using Poisson regression with random effects model was used with development of new damage as the outcome of interest. Gender, cardiovascular risk factors, antiphospholipid syndrome status and most drugs (except hydroxychloroquine, glucocorticoids, mycophenolate and cyclophosphamide) were excluded from the model as they were not associated with development of damage in univariate analysis.Results:273 patients were recruited (91.2% female, 59.3% Caucasian, 17.2% African/Caribbean, 17.2% South Asian) with mean age at recruitment of 38.5 years (SD 14.8). 97.8% had no damage at recruitment (2.2% had SDI score of 1). Median follow-up was 73.4 months (range: 1.8, 153.8) with total follow-up of 1767 patient-years. There were 13 deaths and 114 new damage items occurred during follow-up. There were 6674 assessments with disease activity score: 319 assessments with Grade A activity in 95 patients (84.6% had only 1 system with grade A, range: 1 - 4) and 1704 assessments with Grade A or B activity in 239 patients (78.7% had only 1 system with Grade A or B, range: 1 - 5).BILAG-2004 LDA was achieved in 74.5% of assessments (from 271 patients). BILAG-2004 Remission occurred in 28.2% of assessments (from 234 patients).6401 observations with BST were available (1 observation derived from change in activity between 2 consecutive assessments) and 63.7% were in BST LDA. There was no observation with Persistent Remission between consecutive visits.Table 1 summarises multivariate analysis which showed BILAG-2004 LDA to be inversely associated with damage. Similar results were obtained with BILAG-2004 Remission (RR 0.60 with 95% CI 0.38, 0.96) and BST LDA (RR 0.65 with 95% CI 0.43, 0.99). Cumulative drug exposure since recruitment for mycophenolate was protective against new damage (RR 0.99 with 95% CI 0.99, 0.99).Table 1.VariableRelative Risk (95% CI) for New DamageEthnicityAfro-Caribbean1.22 (0.68, 2.18)South Asian1.81 (0.97, 3.38)Others2.22 (0.63, 7.85)Age at diagnosis1.06 (1.04, 1.08)Prior SDI score0.68 (0.43, 1.06)BILAG-2004 LDA0.60 (0.39, 0.94)Hydroxychloroquine since last visit (per g)0.99 (0.98, 0.99)Steroids since last visit (per 100mg)1.02 (1.01, 1.03)Cyclophosphamide since last visit (per g)1.67 (1.15, 2.41)Conclusion:BILAG-2004 LDA and BST LDA are valid treatment targets in SLE. BILAG-2004 Remission and Persistent Remission are uncommon, which make them unrealistic as a treatment target.References:[1]Yee C. S., et al. The BILAG-2004 systems tally – a novel way of representing the BILAG-2004 index scores longitudinally. Rheumatology (Oxford) 2012; 51[11]: 2099-2105.Acknowledgements :Versus Arthritis, Vifor PharmaDisclosure of Interests:Chee-Seng Yee Consultant of: Bristol Myers Squibb, ImmuPharma, Grant/research support from: Vifor Pharma, Caroline Gordon Speakers bureau: UCB, Consultant of: Center for Disease Control, Astra-Zeneca, MGP, Sanofi and UCB, Mohammed Akil: None declared, Peter Lanyon: None declared, Christopher John Edwards Consultant of: Glaxo Smith Kline, Roche, Grant/research support from: Glaxo Smith Kline, Roche, David Isenberg: None declared, Anisur Rahman: None declared, Lee-Suan Teh: None declared, Sofia Tosounidou: None declared, Robert Stevens: None declared, Ahtiveer Prabu: None declared, Bridget Griffiths: None declared, Neil McHugh: None declared, Ian N. Bruce: None declared, Yasmeen Ahmad: None declared, Munther Khamashta: None declared, Vernon Farewell: None declared
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Mellink Bijtel, Eric. "USO DEL HÁBITAT, DINÁMICA POBLACIONAL Y ESTACIONALIDAD REPRODUCTIVA DE ROEDORES EN EL ALTIPLANO POTOSINO, MÉXICO." Revista Mexicana de Mastozoología (Nueva Epoca) 1, no. 1 (July 1, 1995): 1. http://dx.doi.org/10.22201/ie.20074484e.1995.1.1.155.
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RESUMEN. En este trabajo se reportan las preferencias de hábitat, dinámica poblacional y estacionalidad repoductiva de Perognathus jlavus, Chaetodipus hispidus, C. nelsoni, C. penicillatus, Dipodomys ordii, D. merriami, Liomys irroratus, Reithrodontomys fulvescens, Peromyscus maniculatus, Onychomys arenicola y Sigmodon hispidus en asociación con tres sistemas agrícolas áridos, sus bordes y sus alrededores no cultivados, en el Altiplano de San Luis Potosí, México. Al parecer, la cubierta herbácea es la característica más importante del hábitat. Los roedores presentaron dos patrones estacionales diferentes: la mayoría tuvo el nivel poblacional más alto durante el verano, aunque algunos lo presentaron en invierno. A pesar de las diferencias en la estacionalidad de la población, todos los roedores tuvieron su pico reproductivo durante el verano, relacionado en alguna forma con la época de lluvias. ABSTRACT. This work reports on the habitat preferences, population dynamics and reproductive seasonality of Perognatusflavus, Chaetodipus hispidus, C. nelsoni, C. penicillatus, Dipodomys ordii. D. merriami, Liomys irroratus, Reithrodontomys fulvescens, Peromyscus maniculatus. Onychomys arenicola and Sigmodon hispidus in association with three dry farming systems and their unfarmed neighboring areas and borders, in the San Luis Potosí Plateau, Mexico. lt was found that herbaceaous cover seemed to be the most important habitat characteristic. Rodents presented two different seasonal patterns: most had their highest populations during the summer. But some did so during the winter. Despite differences in population seasonality, all rodents had their highest reproductive rates during the summer, related in some form with the rainy season. Palabras clave: San Luis Potosí, México, roedores, dinámica poblacional.
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Cooper, Sheldon J., and James A. Gessaman. "Thermoregulation and Habitat Preference in Mountain Chickadees and Juniper Titmice." Condor 106, no. 4 (November 1, 2004): 852–61. http://dx.doi.org/10.1093/condor/106.4.852.
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Abstract The Mountain Chickadee (Poecile gambeli) and the Juniper Titmouse (Baeolophus ridgwayi) are closely related, ecologically similar passerines sympatric in portions of their range. However, Mountain Chickadees prefer higher altitude, cooler habitats than Juniper Titmice. We measured oxygen consumption, evaporative water loss, body temperature, and thermal conductance on seasonally acclimatized individuals to determine if thermoregulatory differences correlate with habitat preference. The Mountain Chickadee's lower critical temperature was 4.2°C lower than the Juniper Titmouse's in summer and 2.4°C lower in winter. Thermal conductance decreased significantly in winter relative to summer in Mountain Chickadees but not in Juniper Titmice. The Mountain Chickadee's upper critical temperature was 4.2°C lower than the Juniper Titmouse's in summer. Also in summer, Mountain Chickadees had significantly higher body temperature above the upper critical temperature than Juniper Titmice, indicating less heat tolerance. The overall metabolic response to temperature in these two species suggests that physiology plays a role in maintaining their habitat segregation. Termo-regulación y preferencia de hábitat en Poecile gambeli y Baeolophus ridgwayi Resumen. Las aves paserinas Poecile gambeli y Baeolophus ridgwayi, cercanamente emparentadas y ecológicamente similares, se distribuyen de modo simpátrico en partes de sus rangos. Sin embrago, P. gambeli prefiere ambientes más elevados y frescos que B. ridgwayi. Medimos el consumo de oxígeno, la pérdida de agua por evaporación, la temperatura corporal y la conductancia térmica en individuos aclimatados estacionalmente para determinar si las diferencias en termo-regulación se correlacionan con la preferencia de hábitat. La temperatura crítica menor de P. gambeli fue 4.2°C más baja que la de B. ridgwayi en el verano y 2.4°C más baja en el invierno. La conductancia térmica disminuyó significativamente en el invierno en relación al verano en P. gambeli pero no en B. ridgwayi. La temperatura crítica mayor de P. gambeli fue 4.2°C más baja que la de B. ridgwayi en el verano. También en el verano, P. gambeli tuvo una temperatura corporal significativamente mayor, por arriba del límite superior de temperatura crítica, que la de B. ridgwayi, indicando menor tolerancia al calor. La respuesta metabólica global a la temperatura en estas dos especies sugiere que la fisiología juega un rol importante en mantener la segregación de sus ambientes.
Books on the topic "Vernon, B.C"
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Camp Vernon: A century of Canadian military history. Vernon, BC: Kettle Valley Publishing Inc., 2004.
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John, Choong. 5 Starting the Arbitration: (SIAC RULES 1 TO 4). Oxford University Press, 2018. http://dx.doi.org/10.1093/law/9780198810650.003.0005.
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This chapter starts by considering which version of the Singapore International Arbitration Centre (SIAC) Rules should apply to an arbitration and the meaning of certain defined terms (Rule 1). The SIAC notice provisions (Rule 2) are addressed in Part B. The matters to be covered by a claimant in a notice of arbitration in order to start an arbitration (Rule 3) are then covered in Part C. Finally, the requirements for a valid response to a notice of arbitration (Rule 4) are explained in Part D. Unless otherwise stated, all references to the SIAC Rules are to the 2016 version of the rules.
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Birch, Jonathan. Hamilton’s Rule as an Organizing Framework. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198733058.003.0002.
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Queller’s version of Hamilton’s rule (HRG), derived from the Price equation, states that the mean breeding value for a social character increases if and only if rb > c, where r is the coefficient of relatedness between social partners, b is the benefit conferred on recipients, and c is the cost incurred by actors. The value of HRG lies in its ability to provide an organizing framework for social evolution theory, helping us to interpret, classify, and compare more detailed models of particular scenarios. HRG does this by allowing us to classify causal explanations of positive change by their commitments regarding the sign of rb and c. This leads to a four-part taxonomy of explanations, comprising indirect fitness explanations, direct fitness explanations, hybrid explanations, and wholly or partially non-selective explanations. There are plausible instances of all four categories in the natural world.
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Nagar, Richa. Representation, Accountability, and Collaborative Border Crossings. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252038792.003.0005.
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This chapter is a revised version of an article originally written between 2002 and 2003 in consultation with Farah Ali (an alias) and what was then called the Sangtin Samooh, or Sangtin women's collective, of Sitapur District in India. It argues for a postcolonial and transnational feminist praxis that focuses on (a) conceptualizing and implementing collaborative efforts that insist on crossing difficult borders; (b) the sites, strategies, and skills deployed to produce such collaborations; and (c) the specific processes through which such collaborations might find their form, content, and meaning. To ground this discussion, it draws on two collaborative initiatives that the author undertook in Uttar Pradesh—the first with “Farah Ali,” a Muslim woman who shared her life story in the aftermath of 9/11 with an explicit aim of reentering the United States with her daughter; the second with members of the Mahila Samakhya Programme in Sitapur, who were beginning to imagine the future of the organization, Sangtin. The chapter ends with a poem that confronts the limits of critique that academics undertake.
Book chapters on the topic "Vernon, B.C"
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Reeves, John C. "Christian Arabic." In A Guide to Early Jewish Texts and Traditions in Christian Transmission, 195–210. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190863074.003.0010.
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Christian Arabic literature represents an enormous corpus of biblically affiliated lore which remains remarkably underexploited by most modern scholars of Jewish apocryphal and pseudepigraphical literature. The present chapter focuses primarily on some textual examples culled from the popular and influential universal histories produced by Christian writers Eutychius (Sa‘īd b. Biṭrīq) of Alexandria (d. 940), Agapius (Maḥbūb b. Qusṭanṭīn) of Manbij (d. c. 950), and the Arabic version of the so-called secular history of the justly celebrated Bar Hebraeus (Abu’l-Faraj b. al-‘Ibrī, d. 1286). It is hoped that the present chapter will stimulate further comparative work and contributions to this important field of study.
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Holmberg, Anders. "On the bottleneck hypothesis of Verb Second in Swedish." In Rethinking Verb Second, 40–60. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198844303.003.0003.
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According to the bottleneck hypothesis V2 order is the effect of (a) a feature which attracts the finite verb or auxiliary to Fin, and (b) an EPP-feature which requires a maximal constituent to merge with FinP. There is a strong and a weak version of the bottleneck hypothesis. According to the strong version, the EPP of Fin can only be checked by movement, i.e. internal merge of a constituent with FinP. According to the weak version external merge of a constituent with FinP will do. The strong version cannot be strictly upheld: it can be violated by as-for phrases and adjunct clauses, but the weak version can be. All adverbs and particles in the C-domain that check V2 can alternatively be realized within IP, while no adverbs and particles in the C-domain that do not check V2 can be, which is consistent with the strong bottleneck hypothesis, if the V2-checking adverbs and particles all move initially to spec of Fin. The analysis of the pronoun in copy-dislocation and the particle så as heads in the high C-domain, following Eide (2011), is an important component of the theory articulated.
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Charles, David. "Enmattered Form." In The Undivided Self, 42–93. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198869566.003.0003.
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Aristotle acceptance of [A] and [B], as set out in the Introduction, reflects his general hylomorphic theory of natural objects. That theory, as developed in the Physics and Metaphysics, is best understood in terms of the Impure Form and not the Pure Form Interpretation. More specifically, it is argued that he held that [A] The forms of natural objects are inextricably enmattered, inseparable in definition from material features or material activities, and that [B] The matter of natural objects is inextricable in definition from such forms. Further, it is suggested that he held [A] because he believed that [C] The forms of natural objects have to be inextricably enmattered to play the causal roles required of them. Aristotle’s discussion of forms was, it seems, partly motivated by the role of forms as causes of materal change. This way of interpreting Aristotle’s version of the hylomorphic structure of natural objects is contrasted with several other interpretations. Several problems are raised for the Impure Form Interpretation which will be addressed in subsequent chapters.
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LeMoine, Rebecca. "Setting the Stage." In Plato's Caves, 56–88. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780190936983.003.0002.
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Most readers of Plato are familiar with the cave allegory, which compares human beings to prisoners in a cave whose only notion of reality consists of shadows they see projected on the wall. Building on arguments that the cave represents the polis, or political community, this chapter brings to light various indications in Plato’s Republic that each polis creates its own unique version of the cave. Hence, there is not merely one cave, but rather an entire world of cave-like polities. Three major implications emerge from recognizing Plato’s vision of the world as a world of caves: (a) Plato’s view of the world is much more egalitarian than traditionally believed; (b) Plato recognizes that no culture is homogenous; and (c) Plato sees the potential in cross-cultural interaction for intellectual liberation.
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Spasova, Maria. "The Earliest Version of the Slavic Translation of De Anastasiā patriciā in the Serbian Copy of the 14th Century." In Slavic and Balkan linguistics, 228–60. Institute of Slavic Studies, Russian Academy of Sciences, 2020. http://dx.doi.org/10.31168/2658-3372.2020.1.12.
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The section examines the language of an unknown version of the Slavic translation of Περὶ τῆς πατρικίας Ἀναστασίας – article 75 in the Alphabetic–Anonymous Patericon, included in the Serbian Menaion and Triodion Panagyric NHM24. The text is compared with the translation of the sermon in the Alphabetic-Anonymous Patericon and in the Svodnyj Paterik in their earliest copies Gilf50 and Zogr83. The language of the translation is examined on textological, grammatical and lexical levels by applying two main principles: a) for full excerption of the language facts; b) for their systemization based on predefined parameters. The general conclusion from the study is that житие in NHM24 is not only the earliest version of the Slavic translation of Περὶ τῆς πατρικίας Ἀναστασίας, but it is also an independent translation, made at the end of IX and the start of X c., i.e. before the translation in the Alphabetic-Anonymous Patericon. There are grounds for the assumption that the translation is the work of an Old Bulgarian translator and that it was made in the Pliska-Preslav literary center.
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Greenlaw, Raymond, H. James Hoover, and Walter L. Ruzzo. "Complexity." In Limits to Parallel Computation. Oxford University Press, 1995. http://dx.doi.org/10.1093/oso/9780195085914.003.0007.
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The goal of this chapter is to provide the formal basis for many key concepts that are used throughout the book. These include the notions of problem, definitions of important complexity classes, reducibility, and completeness, among others. Thus far, we have used the term "problem" somewhat vaguely. In order to compare the difficulty of various problems we need to make this concept precise. Problems typically come in two flavors: search problems and decision problems. Consider the following search problem, to find the value of the maximum flow in a network. Example 3.1.1 Maximum Flow Value (MaxFlow-V) Given: A directed graph G = (V,E) with each edge e labeled by an integer capacity c(e) ≥ 0, and two distinguished vertices, s and t. Problem: Compute the value of the maximum flow from source s to sink t in G. The problem requires us to compute a number — the value of the maximum flow. Note, in this case we are actually computing a function. Now consider a variant of this problem. Example 3.1.2 Maximum Flow Bit (MaxFlow-B) Given: A directed graph G = (V, E) with each edge e labeled by an integer capacity c(e)≥ 0, and two distinguished vertices, s and t, and an integer i. Problem: Is the ith bit of the value of the maximum flow from source s to sink t in G a 1? This is a decision problem version of the flow problem. Rather than asking for the computation of some value, the problem is asking for a "yes" or "no" answer to a specific question. Yet the decision problem MaxFlow-B is equivalent to the search problem MaxFlow-V in the sense that if one can be solved efficiently in parallel, so can the other. Why is this? First consider how solving an instance of MaxFlow-B can be reduced to solving an instance of MaxFlow-V. Suppose that you are asked a question for MaxFlow-B, that is, "Is bit i of the maximum flow a 1?" It is easy to answer this question by solving MaxFlow-V and then looking at bit i of the flow.
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Hammer, Eric. "Peircean Graphs for Prepositional Logic." In Logical Reasoning with Diagrams. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195104271.003.0011.
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The contributions of C.S. Peirce to the early history of prepositional and predicate logic are well known. Much less well known, however, is Peirce’s subsequent work (for more than ten years) on diagrammatic versions of prepositional and predicate logic. This work was considered by Peirce himself to be his most important contribution to logic. From his experience with chemistry and other parts of science, Peirce had become convinced that logic needed a more visually perspicuous notation, a notation that displayed the compound structure of propositions the way chemical diagrams displayed the compound structure of molecules. Peirce’s graphs for prepositional sentences are built up from sentence letters by the operations of enclosing a graph within a closed figure (interpreted as its negation) and juxtaposing two or more graphs on separate parts of the page (interpreted as their conjunction). For example, a graph like would be interpreted as “If A and B, then C” or “It is false that A and B and not-CV’ A graph such as would be read as “If A then B, but not C.” This chapter gives a modern analysis of Peirce’s diagrammatic version of the propositional calculus from the ground up. In particular, it is an investigation of just what is involved in formulating precisely the syntax, semantics, and proof theory of Peirce’s graphical approach to propositional logic. The project is interesting for several reasons. First, given Peirce’s importance in the history of .logic and his own opinion of the value of his work on graphs, it seems of historical interest to see to what his suggestions amounted. Second, Peirce’s work has gained a following in the computer science community, due especially to the work of Sowa [1984], whose system of conceptual graphs is modeled after Peirce’s work on diagrammatic approaches to prepositional and predicate logic. Third, in reconstructing Peirce’s graphical system we will confront a number of features characteristic of “visual” or “diagrammatic” inference, that is, inference that employs various forms of graphical representations in addition to, or in place of, sentences.
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Muggleton, Stephen, and Wang-Zhou Dai. "Human-like Computer Vision." In Human-Like Machine Intelligence, 199–217. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198862536.003.0010.
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Statistical machine learning is widely used in image classification and typically 1) requires many images to achieve high accuracy and 2) does not provide support for reasoning below the level of classification. By contrast this paper describes an approach called machine learning approach called Logical Vision (LV) which uses a) background knowledge such as light reflection that can itself be learned and used for resolving visual ambiguities, which cannot be easily modeled using statistical approaches, b) a wider class of background models representing classical 2D shapes such as circles and ellipses, c) primitive-level statistical estimators to handle noise in real images, Our results indicate that in real images the new noise-robust version of LV using a single example (ie one-shot LV) converges to an accuracy at least comparable to thirty-shot statistical machine learner on the prediction of hidden light sources.
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Den Uyl, Douglas J., and Douglas B. Rasmussen. "The Perfectionist Turn." In The Perfectionist Turn. Edinburgh University Press, 2016. http://dx.doi.org/10.3366/edinburgh/9781474413343.003.0006.
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This chapter argues against the claim advanced by Daniel Haybron, Daniel C. Russell, and Mark LeBar that human self-perfection is ultimately based on notions of well-being and human flourishing that we bring to our understanding of human nature and in favor of the idea that it is human nature itself that ultimately grounds our understanding of human well-being or human flourishing. In doing so, the question of whether there is some gap between (a) what it is to be a good human being and (b) what is good for a human being is addressed. It is shown that the arguments on behalf of a such a gap fail and that the version of perfectionism that is advanced—that is, individualistic perfectionism—is ideally suited to not only avoid such a gap but also to display their unity, especially when perfection is understood as a process of living things and not as some cosmic or metaphysical process.
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Sarkar, Tanika. "How the Sangh Parivar Writes and Teaches History." In Majoritarian State, 151–74. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190078171.003.0009.
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Beginning with the writings on history by Savarkar and Golwalkar, Tanika Sarkar analyses how Hindu nationalists essentially understand Indian history as a Hindu history. She shows how this understanding of history has slowly percolated through the RSS network of schools and institutions. More recently, this version of history has been inserted into official curricula and history textbooks, from English language textbooks at both the national level, to a range of vernacular textbooks at the state level. Sarkar proceeds to demonstrate that an older and less known Hindu nationalist agenda for historical research has gained force across the country since 2014. This agenda consists of three main aims: a) to elevate the vast corpus of Sanskritpuranas (myths, legends, stories) to the status of literal historical sources; b) to refute the so-called ‘Aryan invasion hypothesis’ and to show that Brahmanical Hinduism is the original religion and civilization of the subcontinent; and c) to incorporate vast numbers of local and tribal gods and legends into an overall national and Brahmanical structure of history and sacred geography. All these initiatives are promoted and generated by a vast base of volunteers and RSS activists across India.
Conference papers on the topic "Vernon, B.C"
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Kumar, Nishant, and Thomas D. Burton. "On Combined Use of POD Modes and Ritz Vectors for Model Reduction in Nonlinear Structural Dynamics." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87416.
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An approach to develop Proper Orthogonal Decomposition (POD) based reduced order models for systems with local nonlinearities is presented in this paper. This technique is applied to multi-degree of freedom systems of coupled oscillators with isolated nonlinear elements. Typically, reduced order models are obtained using POD modes exclusively. In this work, we explore the suitability of using a combination of POD modes and other physically based “Ritz vectors” to produce the reduced model. The objectives are 1). to improve the accuracy of the reduced order differential equation model and 2). to expand the range of system parameters for which the reduced basis provides reasonably accurate approximations. The “Ritz vectors” used in this work are static displacement vectors that are calculated in one of the following three ways: 1). “Load – based Ritz vectors” [1, 2, 7, 8, 12, 16–18] – This is the static displacement vector due to a static loading that is proportional to the static version of the actual (assumed dynamic) loading to which the structure is subjected. 2). “Milman – Chu vectors” [3] – This is the static Ritz vector due to the imposition of equal and opposite static loads on the two masses to which the non-linear element is connected. The loading used to generate the first M – C vector is dictated by the location of the non-linearity. 3). “K – B (Kumar – Burton) vector” – This is a new Ritz vector defined in the spirit of the Milman – Chu vector. The K – B vector is the static displacement vector due to the imposition of a). equal and opposite static loads on the two masses to which the nonlinear element is connected (i.e. same as M – C loading) and b). equal and opposite static loads on the nearest neighbors. Thus, four masses are statically loaded. As for the M – C vector, the K – B loading is dictated by the location of the nonlinear element. The nonlinear model is numerically integrated to generate a full ODE model solution, which we call the “baseline solution”. We select a set of POD modes of the baseline nonlinear system response as basis functions. The POD modes are then augmented by various combinations of the three aforementioned Ritz vectors to generate reduced order models for system having parameters in vicinity of baseline system parameters. Our results indicate that the K – B augmentation vector combined with the Milman – Chu vector is an effective way to account for nonlinear effects for the system considered. The use of combined M – C/K – B augmentation also expands the range of system parameters for which the baseline POD modes provide accurate reduction. This is considered to be a significant result.
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Yang, Tah-Teh, and Ajay K. Agrawal. "Comparative Evaluation of Combustion Codes for Low-Btu Gas Applications." In ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-110.
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Four computer codes (PHOENICS, PCGC, FLUENT and INTERN) representing a spectrum of existing combustion modeling capabilities were evaluated for low-Btu gas applications. In particular, the objective was to identify computer code(s) that can be used effectively for predictions of (a) the flow field to yield efficient combustion, (b) the temperature field to ensure structural integrity and (c) species concentrations to meet environmental emission standards in a gas turbine combustor operating on low-Btu coal gas. Detailed information on physical models, assumptions, limitations and operational features of various codes was obtained through a series of computational runs of increasing complexity and grouped as (a) experimental validation, (b) code comparison and (c) application to coal gas combustion. INTERN is not suitable for the present application since it has been tailored to model combustion process of premixed hydrocarbon fuels. FLUENT is easy to use and has detailed combustion models (in Version 3), however, it is not favored here because the user is unable to alter, modify or change the existing model(s). While PCGC-2 has the most comprehensive models for combustion, it is not user friendly and is inherently limited to axisymmetric geometry. PCGC-3 is expected to overcome these drawbacks. Built in combustion models in PHOENICS are similar to those in FLUENT. However, the user can implement advanced models on PHOENICS leading to a flexible and powerful combustion code.
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Surana, K. S., and H. Vijayendra Nayak. "Solutions of Higher Class and Their Computations for Polymer Flows: Oldroyd-B Constitutive Model." In ASME 2001 Engineering Technology Conference on Energy. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/etce2001-17145.
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Abstract This paper presents formulations, computations and investigations of the solutions of class C00 and C11 for two dimensional viscoelastic fluid flows in u, v, p, τijp, τijs with Oldroyd-B constitutive model using p-version Least Squares Finite Element Formulation (LSFEF). The main thrust of the research work presented in the paper is to employ ‘right class of interpolations’ and the best computational strategy to establish: i) when does Oldroyd-B model begins to fail in simulating the correct physics of flow ii) when and why does the proposed computational process fail iii) is there a correlation between i) and ii). Fully developed flow between parallel plates and the stick-slip problems are used as model problems. The investigations presented in this paper reveal the following. a) The manner in which the stresses are non-dimensionalized significantly influences the performance of the iterative procedure of solving nonlinear algebraic equations. b) Solutions of the class C00 are always the wrong class of solutions of GDEs in variables u, v, p, τijp and τijs and thus spurious. c) C11 class of solutions are the right class of solutions of the GDEs in variables u, v, p, τijp and τijs. d) In the flow domains, containing sharp gradients of the dependent variables, conservation of mass is difficult to achieve at lower p-levels (worse for coarse meshes). e) An augmented form of GDEs are proposed that always ensure conservation of mass at all p-levels regardless of the mesh and the nature of the solution gradients. f) We demonstrate that Oldroyd-B model describes correct physics of dilute polymer solutions of constant viscosity only for a limited range of Deborah numbers. Beyond this range, the computed solutions are not in agreement with the flow physics (thus spurious) even though the proposed computational process works exceptionally well. g) Numerical studies with graded meshes and high p-levels presented in this paper are aimed towards establishing and demonstrating detail behavior of local as well as global nature of the computed 10 solutions, h) Various norms are proposed and tested to judge local and global dominance of elasticity or viscous behavior 1) New definitions are proposed for elongational (extensional) viscosity. The proposed definitions are more in conformity and agreement with the flow physics compared to currently used definitions j) A significant aspect and strength of our work is that we utilize straightforward p-version LSFEF with C00 and C11 type interpolations without linearizing GDEs and that SUPG, SUPG/DC, SUPG/DC/LS operators are neither needed nor used.
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Pilatti, Angelina, Adrian Bravo, Yanina Michelini, Gabriela Rivarola Montejano, and Ricardo Pautassi. "Validation of the Spanish Version of the Marijuana Consequences Questionnaire (S-MACQ)." In 2020 Virtual Scientific Meeting of the Research Society on Marijuana. Research Society on Marijuana, 2021. http://dx.doi.org/10.26828/cannabis.2021.01.000.24.
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Background: The Marijuana Consequences Questionnaire [MACQ] assesses marijuana-related problems. This 8-factor (50-items) measure covers a broad array of multiple dimensions encompassing 50 negative consequences of gradient severity that are particularly relevant in the context of college. The present study aimed to validate the Spanish version of the 50-item Marijuana Consequences Questionnaire (S-MACQ) by analyzing the psychometric properties of internal, convergent, and concurrent validity and estimating internal consistency. We also examined the correlation between the brief (SB-MACQ) and the full S-MACQ and whether they similarly correlate with marijuana outcomes and marijuana-related variables. Method: College students from the two largest public universities of Cordoba city (Argentina) completed an online survey as part of a broader study focused on marijuana use and risky sexual behaviors. Only data from students that reported last-year marijuana use (n=470; 70.6% women; Mean age 22.67±3.52 years; 45.7% enrolled in psychology) were included in the study. We conducted independent samples t-tests to evaluate differences in the number of negative consequences (for the total scale and for each S-MACQ dimension) as a function of biological sex or frequency of use. Confirmatory factor analyses (CFA) was conducted to examine the factor structure of the S-MACQ. We conducted Pearson correlation analyses to examine the association between the number of marijuana-related consequences as measured by the S-MACQ and scores (a) in the CUDIT, a standardized measure of marijuana-related problems (i.e., convergent validity), (b) frequency and quantity of marijuana use (i.e., concurrent validity), (c) motives for marijuana use (i.e., concurrent validity). We examined the Pearson correlation between the SB-MACQ and the S-MACQ and then we estimated the difference between the Pearson correlation of the SB-MACQ and the S-MACQ with all the marijuana outcomes and marijuana-related variables. Results: Results from the CFA supported an 8-factor structure. The scores of the S-MACQ showed appropriate internal, concurrent and convergent validity, alongside with adequate internal consistency. The S-MACQ was largely correlated with the SB-MACQ and the correlations between these two versions and marijuana outcomes/marijuana-related variables did not significantly differ. Discussion: Findings supported the S-MACQ as a valid measure to assess marijuana-related problems in Spanish-speaking students. The instrument can be used to identify a broad diversity of marijuana problems in this population.
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Tyagi, Pawan. "Second Modified Student Presentation Based Effective Teaching (SPET) Method Tested in COVID-19 Affected Senior Level Mechanical Engineering Course." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23615.
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Abstract Student presentation based effective teaching (SPET) approach was designed to engage students with different mindsets and academic preparation levels meaningfully and meet several ABET student learning outcomes. SPET method requires that students prepare themselves by guided self-study before coming to the class and make presentations to teach the whole class by (a) presenting complex concepts and systems appealingly and engagingly, and most importantly (b) serving as the discussion platform for the instructor to emphasize on complex concepts from multiple angles during different presentations. In class, SPET presentations address the conceptual questions that are assigned 1–2 weeks before the presentation day. However, the SPET approach becomes impractical for large class sizes because (i) during one class period all the students can not present, (ii) many students do not make their sincere efforts. This paper focuses on the second modification of SPET to make it practical for large classes. The method reported in this paper was tested on MECH 462 Design of Energy System Course. Unlike the first modified approach, all the students were expected to submit the response to the preassigned questions before coming to the class. In class, SPET group presentations were prepared by the group of 3–6 students, who prepared themselves by doing SPET conceptual questions individually. Students communicated with each other to make a cohesive presentation for ∼30 min. In two classes per week, we covered 5–6 group presentations to do enough discussions and repetition of the core concepts for a more in-depth understanding of the content. During the presentation, each student was evaluated for (a) their depth of understanding, (b) understanding other parts of the presentation covered by other teammates, and (c) quality of presentation and content. The student who appeared unprepared in the class group presentation were provided direct feedback and resources to address concerning areas. SPET approach was applied in the online mode during the campus shut down due to COVID-19. SPET was immensely effective and helped to complete the course learning outcomes without interruptions. SPET could be customized for the online version without any additional preparation on the instructor part.
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Zhang, Jiecheng, George Moridis, and Thomas Blasingame. "Message-Passing-Interface MPI Parallelization of Iteratively Coupled Fluid Flow and Geomechanics Codes for the Simulation of System Behavior in Hydrate-Bearing Geologic Media." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206161-ms.
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Abstract The Reservoir GeoMechanics Simulator (RGMS), a geomechanics simulator based on the finite element method and parallelized using the Message Passing Interface (MPI), is developed in this work to model the stresses and deformations in subsurface systems. RGMS can be used stand-alone, or coupled with flow and transport models. pT+H V1.5, a parallel MPI-based version of the serial T+H V1.5 code that describes mass and heat flow in hydrate-bearing porous media, is also developed. Using the fixed-stress split iterative scheme, RGMS is coupled with the pT+H V1.5 to investigate the geomechanical responses associated with gas production from hydrate accumulations. The code development and testing process involve evaluation of the parallelization and of the coupling method, as well as verification and validation of the results. The parallel performance of the codes is tested on the Ada Linux cluster of the Texas A&M High Performance Research Computing using up to 512 processors, and on a Mac Pro computer with 12 processors. The investigated problems are: Group 1: Geomechanical problems solved by RGMS in 2D Cartesian and cylindrical domains and a 3D problem, involving 4x106 and 3.375 x106 elements, respectively; Group 2: Realistic problems of gas production from hydrates using pT+H V1.5 in 2D and 3D systems with 2.45x105 and 3.6 x106 elements, respectively; Group 3: The 3D problem in Group 2 solved with the coupled RGMS-pT+H V1.5 simulator, fully accounting for geomechanics. Two domain partitioning options are investigated on the Ada Linux cluster and the Mac Pro, and the code parallel performance is monitored. On the Ada Linux cluster using 512 processors, the simulation speedups (a) of RGMS are 218.89, 188.13, and 284.70 in the Group 1 problems, (b) of pT+H V1.5 are 174.25 and 341.67 in the Group 2 cases, and (c) of the coupled simulators is 331.80 in Group 3. The results produced in this work show the necessity of using full geomechanics simulators in marine hydrate-related studies because of the associated pronounced geomechanical effects on production and displacements and (b) the effectiveness of the parallel simulators developed in this study, which can be the only realistic option in these complex simulations of large multi-dimensional domains.
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Couso, Daniel, Jose´ Fano, Felicidad Ferna´ndez, Elena Ferna´ndez, Julio A. Guirao, Jose´ L. Lastra, Victor J. Marti´nez, Javier Ordieres, and Iva´n Va´zquez. "Development of Codes and Standards for ITER In-Vessel Components." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57611.
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This paper describes the changes made to existing version of the Structural Design Criteria for In-vessel Components (SDC-IC) within the ITER project, as a result of the revision and update process carried out recently. Several ITER components, referred to as In-vessel Components, are located inside the ITER Vacuum Vessel: (a) Blanket System: shields the Vessel and Magnets from heat and neutron fluxes; (b) Divertor: extracts heat, helium ash and impurities from the plasma; (c) Fuelling: gas injection system to introduce fuel into the Vacuum Vessel; (d) Ion Cyclotron Heating & Current Drive System: transfers energy to the plasma by electromagnetic radiation; (e) Electron Cyclotron Heating & Current Drive System: uses radio waves to heat to the plasma; (f) Neutral Beam Heating & Current Drive System: accelerates Deuterium particles into the plasma; (g) Lower Hybrid Heating & Current Drive System: drives electric current into the plasma; (h) Diagnostics: measurement systems to control plasma performance, and further understand plasma physics; (i) Test Blankets: demonstrate techniques for ensuring tritium production within the tokamak. ITER In-vessel Components will be subjected to special operating and environmental conditions (neutron radiation, high heat fluxes, electromagnetic forces, etc.). The effects of irradiation on them, including embrittlement, swelling and creep, are not addressed in the existing commercial codes. These conditions are different from conditions in fission reactors and create challenging issues related to the design of these components. For this reason the Structural Design Criteria for ITER In-vessel Components (SDC-IC) [1] was developed for design purposes. SDC-IC was based mainly on the RCC-MR [2] code, and included rules for assessment of effect of neutron irradiation. In 2008 some issues were identified: (1) Some parts had not been fully prepared to cover all needed areas for design; (2) Some important topics needed to be improved; (3) New editions of codes on pressure equipment had been published; (4) No manufacturing rules were included, so consistency between manufacturing rules to be used and design rules in SDC-IC needed to be demonstrated; (5) Compliance with the ESP (French Decree concerning the Pressure Equipment Directive 97/23/EC for non-nuclear pressure vessels) [3] and ESPN (French Order applicable for pressure vessels intended for nuclear facilities) [4] needed to be addressed. The work carried out for Fusion For Energy (European Union’s Joint Undertaking for ITER) is: (a) Modification of design rules, incorporating rules from recently developed codes, and development of specific design rules to cover ITER specific issues and operational conditions; (b) Demonstration of consistency between design rules in SDC-IC and european standards used for manufacturing, in particular EN 13445 [5]; identifying areas where consistency is not provided; (c) Assessment of the compliance with the Essential Safety Requirements of the French Regulations (ESP and ESPN).
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Keisuke, Huziwara. "Devising an Orthography for the Cak Language by Using the Cak Script." In GLOCAL Conference on Asian Linguistic Anthropology 2019. The GLOCAL Unit, SOAS University of London, 2019. http://dx.doi.org/10.47298/cala2019.16-4.
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Cak (ISO 639-3 ckh) represents a Tibeto-Burman language spoken in the Chittagong Hill Tracts, Bangladesh. The language is known as Sak in Rakhaing State, Burma. The total number of native speakers of the language is estimated at approximately 3,000 in Bangladesh and 1,000 in Burma (Simons and Fennig eds. 2017). Although Cak and Sak are mutually understandable where native words are concerned, comprehensibility becomes arduous with Bangla loan words in Cak, and with Arakanese/Burmese loan words in Sak. Until recently, Cak/Sak did not have a script of its own. However, by the beginning of the 21st century, the Cak script was developed and finally published as Ong Khyaing Cak (2013), in which its fundamental system is described. Although well designed overall, the current Cak writing system found in Ong Khyaing Cak (2013) has several shortcomings. Huziwara (2015) discusses the following five instances: (a) No independent letter for /v/, (b) unnecessary letters for the non-phonemic elements such as the voiced aspirated stops and the retroflexes, (c) the arbitrary use of short and long vowel signs, (d) a frequent omission of high tone marks in checked syllables, and (e) multiple ways to denote coda consonants. In this paper, Huziwara (2015) will first be reviewed. Then, the basic phonetic correspondences between Cak in Bangladesh and Sak in Burma will be examined. Finally, based on these two discussions, an orthography to be employed in the forthcoming Cak-English-Bangla-Burmese dictionary, a revised version of Huziwara (2016), will be demonstrated.
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Collu, Maurizio, Michael Borg, Andrew Shires, Francesco N. Rizzo, and Emilio Lupi. "FloVAWT: Further Progresses on the Development of a Coupled Model of Dynamics for Floating Offshore VAWTS." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-24459.
Full textAbstract:
Interest in potential wind farm sites in deeper waters and further offshore has substantially increased recently, and in parallel an increased interest towards floating, rather than bottom-fixed, offshore wind turbines: the Energy Technologies Institute (UK) recently announced a plan to invest £25m in offshore floating wind turbine projects. Furthermore, a recent document by the UK LCICG (Low Carbon Innovation Coordination Group), demonstrated that the “Development and demonstration of new concepts such as floating foundations for water depths >60m”, has a value in meeting emissions targets at low cost of up to £13bn. The present article is a follow on with the previous article presented at OMAE 2013 [1], in which the progresses on the development of an aero-hydro-servo-elastic coupled model of dynamics for VAWT are illustrated, called FloVAWT. The further progresses presented consist in: a) the model, in particular the hydrodynamic module, has been now validated against experimental data provided by the DeepCwind project (see OC4) for the semi-submersible support structure configuration, b) the additional velocity component due to the 6 degree-of-freedom motion of the supporting floating structure are now taken into account within the aerodynamic module, while previously only the displacement imposed by the support structure was considered, c) a new module dedicated to the mooring system has been developed and validated, capable of modelling catenary mooring systems with a quasi-static, energy-based approach. Some of the new capabilities of the program are illustrated through a case study of a Darrieus-type VAWT rotor coupled with the OC4 semi-submersible support structure. Comparisons with the previous version of the program are presented, giving an insight on the relative importance of the additional aspects taken into account.
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Wishart, Jeffrey D., Zuomin Dong, and Marc M. Secanell. "Optimization of a PEM Fuel Cell System for Low-Speed Hybrid Electric Vehicles." In ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/detc2006-99606.
Full textAbstract:
Design optimization is performed by presenting a systematic method to obtain the optimal operating conditions of a Proton Exchange Membrane (PEM) fuel cell system targeted towards a vehicular application. The fuel cell stack model is a modified version of the semi-empirical model introduced by researchers at the Royal Military College of Canada and one that is widely used by industry. Empirical data obtained from tests of PEM fuel cell stacks are used to determine the empirical parameters of the fuel cell performance model. Based on this stack model, a fuel cell system model is built in MATLAB. Included in the system model are heat transfer and gas flow considerations and the associated Balance of Plant (BOP) components. The modified ADVISOR vehicle simulation tool is used to integrate the New York City Cycle (NYCC) drive cycle and vehicle model to determine the power requirements and hence the load cycle of the fuel cell system for a low-speed fuel cell hybrid electric vehicle (LSFCHEV). The optimization of the powerplant of this vehicle type is unique. The vehicle model has been developed in the work to describe the characteristics and performance of an electric scooter, a simple low-speed vehicle (LSV). The net output power and system exergetic efficiency of the system are maximized for various system operating conditions using the weighted objective function based on the load cycle requirement. The method is based on the coupling of the fuel cell system model with three optimization algorithms (a) sequential quadratic programming (SQP); (b) simulated annealing (SA); and (c) genetic algorithm (GA). The results of the optimization provide useful information that will be used in future study on control algorithms for LSFCHEVs. This study facilitates research on more complex fuel cell system modeling and optimization, and provides a basis for experimentation to verify the fuel cell system model.