2,364 research outputs found
Eric C. Lincoln, Professor of Sociology and Religion, 1971
No full textThis is an interview with Eric C. Lincoln. Eric was a Professor of Sociology and religion, Union Theological Seminary and author of many books and articles on Negro history. In this recording the contributors discuss local memphis politics, sociology, and race relations compared to that of other cities in the South and the rest of the country
Eric Fitch Daglish (1892–1966): naturalist, illustrator, author and editor
No full text Eric Fitch Daglish (1892–1966) was a naturalist by inclination, a free-lance author and editor in business and, by practice, a wood-engraver of high repute. Taught wood-engraving skills by Paul Nash, he was a close friend also of other famous engravers (John Nash, Eric Gill) within the Society of Wood Engravers. He applied these skills to illustrating his own books for popular audiences on topics ranging from flowers to birds, beasts and the English countryside. Fluent in German, he translated books from that language to supplement his income in the years succeeding the First World War. He is perhaps best known for his bird books: Woodcuts of British birds, The life story of birds and Birds of the British Isles, but was also a prolific writer about dogs. His oeuvre is examined, and his contribution compared with other contemporary bird artists who embraced wood-engraving techniques. A bibliography of his natural history works as author and as editor is included. </jats:p
The Lamb shift at finite temperature and density
No full textThe Lamb shift is a well-known phenomenon that breaks the degeneracy in the 2S1/2 and 2P1/2 energy levels. The currently accepted experimental value is measured to be approximately equal to 1057.862 MHz, or 4.3795×10-6 eV, and theoretically calculated values are very close to this. Theoretical derivation requires a perturbative approach of quantum field theory. Renormalization constants of Quantum Electrodynamics (QED) such as vacuum polarization, self-energy, and radiative corrections to the wave function of the electron contribute to the currently accepted theoretical value of the Lamb shift. We review the structure of the hydrogen atom and the Lamb shift of its 2S1/2 and 2P1/2 energy levels in isolation, and then calculate the temperature and density contributions to the Lamb shift for extremely hot and dense media using the real time approach of QED, which give all the radiative corrections in the form of Masood’s function in many body QED. This result has very important applications in astrophysics and cosmology
Dual VP Classes
No full textWe consider the complexity class ACC^1 and related families of arithmetic circuits. We prove a variety of collapse results, showing several settings in which no loss of computational power results if fan-in of gates is severely restricted, as well as presenting a natural class of arithmetic circuits in which no expressive power is lost by severely restricting the algebraic degree of the circuits. These results tend to support a conjecture regarding the computational power of the complexity class VP over finite algebras, and they also highlight the significance of a class of arithmetic circuits that is in some sense dual to VP.Presented at the 40th International Symposium on Mathematical Foundations of Computer Science (MFCS '15).Published as a chapter in: Mathematical foundations of computer science 2015 : 40th International Symposium, MFCS 2015, Milan, Italy, August 24-28, 2015, Proceedings. Part II, as part of the series
Lecture notes in computer science 9235, edited by G.F. Italiano, G. Pighizzini, & D. Sannella (Berlin: Springer, 2015). LNCS 9235 forms part of the LNCS sublibrary Theoretical computer science and general issues.The final publication is available at http://dx.doi.org/10.1007/978-3-662-48054-0Peer reviewed.The later journal article version of this paper is available from the publisher at http://dx.doi.org/10.1007/s00037-016-0146-7 and at http://dx.doi.org/doi:10.7282/T3ZC8531 (Accepted Manuscript version)
Devon - Pit 5
No full textPlant species presence/absence from Pit5 on Devon Island Nunavut.The site was on the Truelove Lowland, a 43 km2 polar oasis on Devon Island, Nunavut. Sample plots were located on dry beach ridges and had plant communities dominated by low growing perennials such as Salix arctica, Dryas integrifolia and Carex spp.The rectangular plot (90 x 200 cm) was surveyed in July 2008. The plot was divided into contiguous 10 cm by 10 cm quadrats and species presence in each quadrat was recorded to produce a stem map precise to the nearest 10 cm. Variables PX and PY record the coordinates of the center of each 10cm by 10cm subquadrat. Variable species is a species code drawn from the genus and species names of the vascular plants present. Citation for this dataset is: Lamb, E. G. et al. 2016. A high-throughput belowground plant diversity assay using next-generation sequencing of the trnL intron. - Plant Soil 404: 361-372
Devon - Pit 3
No full textPlant species presence/absence from Pit3 on Devon Island Nunavut.The site was on the Truelove Lowland, a 43 km2 polar oasis on Devon Island, Nunavut. Sample plots were located on dry beach ridges and had plant communities dominated by low growing perennials such as Salix arctica, Dryas integrifolia and Carex spp.The rectangular plot (90 x 200 cm) was surveyed in July 2008. The plot was divided into contiguous 10 cm by 10 cm quadrats and species presence in each quadrat was recorded to produce a stem map precise to the nearest 10 cm. Variables PX and PY record the coordinates of the center of each 10cm by 10cm subquadrat. Variable species is a species code drawn from the genus and species names of the vascular plants present. Citation for this dataset is: Lamb, E. G. et al. 2016. A high-throughput belowground plant diversity assay using next-generation sequencing of the trnL intron. - Plant Soil 404: 361-372
Devon - Pit 2
No full textPlant species presence/absence from Pit2 on Devon Island Nunavut.The site was on the Truelove Lowland, a 43 km2 polar oasis on Devon Island, Nunavut. Sample plots were located on dry beach ridges and had plant communities dominated by low growing perennials such as Salix arctica, Dryas integrifolia and Carex spp.The rectangular plot (90 x 210 cm) was surveyed in July 2008. The plot was divided into contiguous 10 cm by 10 cm quadrats and species presence in each quadrat was recorded to produce a stem map precise to the nearest 10 cm. Variables PX and PY record the coordinates of the center of each 10cm by 10cm subquadrat. Variable species is a species code drawn from the genus and species names of the vascular plants present. Citation for this dataset is: Lamb, E. G. et al. 2016. A high-throughput belowground plant diversity assay using next-generation sequencing of the trnL intron. - Plant Soil 404: 361-372
Devon - Pit 1
No full textPlant species presence/absence from Pit1 on Devon Island Nunavut.The site was on the Truelove Lowland, a 43 km2 polar oasis on Devon Island, Nunavut. Sample plots were located on dry beach ridges and had plant communities dominated by low growing perennials such as Salix arctica, Dryas integrifolia and Carex spp.The rectangular plot (90 x 220 cm) was surveyed in July 2008. The plot was divided into contiguous 10 cm by 10 cm quadrats and species presence in each quadrat was recorded to produce a stem map precise to the nearest 10 cm. Variables PX and PY record the coordinates of the center of each 10cm by 10cm subquadrat. Variable species is a species code drawn from the genus and species names of the vascular plants present. Citation for this dataset is: Lamb, E. G. et al. 2016. A high-throughput belowground plant diversity assay using next-generation sequencing of the trnL intron. - Plant Soil 404: 361-372
Devon - Pit 4
No full textPlant species presence/absence from Pit4 on Devon Island Nunavut.The site was on the Truelove Lowland, a 43 km2 polar oasis on Devon Island, Nunavut. Sample plots were located on dry beach ridges and had plant communities dominated by low growing perennials such as Salix arctica, Dryas integrifolia and Carex spp.The rectangular plot (90 x 220 cm) was surveyed in July 2008. The plot was divided into contiguous 10 cm by 10 cm quadrats and species presence in each quadrat was recorded to produce a stem map precise to the nearest 10 cm. Variables PX and PY record the coordinates of the center of each 10cm by 10cm subquadrat. Variable species is a species code drawn from the genus and species names of the vascular plants present. Citation for this dataset is: Lamb, E. G. et al. 2016. A high-throughput belowground plant diversity assay using next-generation sequencing of the trnL intron. - Plant Soil 404: 361-372
Public housing and lethal violence: an analysis of the effect of the presence of public housing on homicide rates
No full textAfter the Second World War, the Department of Housing and Urban Development (HUD) provided funding to local housing authorities to build large scale public housing developments in many cities across the United States. Unfortunately, most of those housing projects were beset with a host of problems as time progressed, including deteriorating building structures, concentrated poverty, racial segregation, and crime. In perhaps no city is this story more heavily studied than in Chicago. Chicago’s public housing tribulations are legendary and are well documented in the academic literature. Many of Chicago’s projects were large high-rise projects located in disadvantaged, isolated, and residentially distinct neighborhoods with strong gang, drug, and crime presence. However, relatively little research has examined the association between Chicago’s public housing and homicide. Specifically, it is uncertain as to whether the unique physical and social environments of public housing developments have an independent effect on lethal violence or whether the high rates of homicides occurring in public housing areas are influenced predominately by neighborhood conditions. Utilizing the Chicago Homicide Data set, this dissertation disentangles the effects of public housing on lethal violence. This study, first, estimated negative binominal regression models to determine the effect of the presence of public housing on tract level rates of homicide. The results of these analyses indicate that the presence of public housing is not a significant predictor of the rates of lethal violence and neighborhood conditions are driving the high rates of homicides occurring in public housing areas. Secondly, the nature of lethal violence occurring in public housing areas was determined by using negative binominal regression and bivariate analyses. Homicides, disaggregated by motive, do not occur at higher rates or disproportionately in Chicago’s tracts with public housing compared to tracts without. The findings from this dissertation indicate that public housing areas do not seem to be micro places that influence a specific type of violence and that neighborhood conditions are driving the high rates of homicide occurring in public housing areas rather than the unique physical and social environments of public housing developments.Ph. D.Includes bibliographical referencesIncludes vitaby Eric G. Lesneski
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