5,885 research outputs found
Performance of gravel aggregates in superpave mixes with 100/95 angularity
No full textThe current aggregate requirement for aggregate angularity that the NYSDOT requires for their Superpave Hot Mix Asphalt (HMA) is 100/98. With this requirement, many of the gravel quarries in New York State cannot meet that specification. As a result, quarries that are further away from the job site have to transport the aggregates which in turn increases the cost of construction. This paper investigates a multitude of test methods to determine whether the NYSDOT can further lower their Superpave aggregate angularity requirement. Also, this paper delves into "grade bumping".M.S.Includes bibliographical referencesIncludes abstractby Christopher L. Ericso
Predicted response of the lichen epiphyte lecanora populicola to climate change scenarios in a clean-air region of northern Britain
No full textStudies in the response of vegetation to predicted future climate change have focussed on vascular plants and are therefore largely unrepresentative of wider botanical diversity (i.e. comprising cryptogams; algae, mosses, liverworts and fungi including lichens). This paper presents a study to predict the response of a cryptogam species, the epiphytic lichen Lecanora populicola, to climate change scenarios. L. populicola is an easily dispersed species that occurs predictably in a widespread habitat, i.e. aspen stands. The study area was geographically constrained to a clean-air region of northern Britain. Thus, using the popular bioclimatic envelope approach, the projected climatic response of L. populicola is not expected to be confounded by air-borne pollution effects, or dispersal and habitat limitation. Non-parametric multiplicative regression was used to describe the response of L. populicola to seven climate variables, and an optimum model projected using UKCIP02 scenarios, comprising two time-frames (2020 s and 2050 s) and two greenhouse gas emission levels (low and high). Model predictions suggest an overall increase in the potential range of L. populicola, and, by association, several other ‘Boreal’ lichen epiphytes. Projected increases in the occurrence of L. populicola are associated with predicted summer drying, and indicate a putative threat to negatively associated ‘oceanic’ lichens
Christopher Dawson
No full textInspired with Jude P. Dougherty’s works in which he stresses the overruling importance of the classical, humanistic education and the central place and role of religion in the Western culture, the author presents Christopher Dawson’s analysis of the Western civilization and his demonstration of the central role of Christianity in it. The author traces the premises on which was based Dawson’s opinion that modern Western man might be absorbed by his technical inventions, to the point of losing his soul
Utah botanical explorer Charles Christopher Parry (28 August 1823–20 February 1890)
No full textThe Utah botanical contributions of Charles Christopher Parry are discussed. Especial emphasis is on his trips to Utah in 1874 and 1875. Plants taken during those years, which were subsequently listed as type-specimens, are listed. Insight is gained into this window in Utah botanical history through his letters to Dr. George Engelmann and limited correspondence from Engelmann and Joseph Ellis Johnson
Computer Science and Engineering Research Review 1984-1985
No full textResearch with the Butterfly Multicomputer / Christopher M. Brown, Carla S. Ellis, Jerome A. Feldman, Thomas J. LeBlanc, Gary L. Peterson p. 3;
Evidential Inference in Activation Networks /
Jerome A. Feldman, Lokendra Shastri p. 25;
A Microprogrammable Machine for Research in Computer Architecture and Operating Systems / Charles W. Merriam
p. 31;
List of Faculty p. 47;
Publications p. 49;
Seminars p. 53;
Grant Support p. 55;
Industrial Support p, 55
Culture and religion
No full textCulture is the result of, and is itself expressed through, religion, language, institutions and history. Culture is persistent but does change slowly over time. Religion is either one manifestation of culture or itself shapes that culture. This chapter discusses recent contributions to the economics of culture and religion, a literature which was instigated by economic historians and has long been dominated by their work. Its author especially focuses on the role of culture and religion in engendering industrial progress and institutional change
Epigenetic regulation and transcription factor programming enhances neurogenesis in neural stem cells
No full textIn this thesis, we questioned how neuronal and glial phenotypes become specialized. Epigenetic chromatin modifiers and transcription factors were investigated on their roles in programming and maintaining neural lineage restriction. A relatively homogeneous population of cells was generated by deriving immortalizing neural clones from embryonic rat forebrains. Three phenotypes; neuronal, glial and multipotential (GE6, GE2, CTX8), provided contrasting lineages to probe the factors responsible for shaping cell fate. One particular clone, GE6, differentiated into a functional inhibitory like interneuron. Gene expression analysis showed several genes such as Ascl1, Dlx1, Dlx5, may be responsible for the interneuronal phenotype. Epigenetic regulation through histone modifications is believed to be an essential component within the developing nervous system, ultimately affecting cell fate. Testing chromatin signatures on specific neural genes with permissive and repressive histone “marks” shows that chromatin state in undifferentiated precursors correlates with current and predicts downstream gene expression. These results suggest that cell fate may already be predetermined. Furthermore, ChIP sequencing reveals global differences between the representative clones. Extrinsic growth factors, such as BMP2 promotes the neuronal and glial phenotypes in the multipotential cell CTX8. BMP2 asserts its phenotypic response in part by regulating global acetylation enrichment in specific neural gene networks, providing a mechanism to promote and maintain cell fate. Directly altering chromatin marks using a histone deacetylase inhibitor, valproic acid (VPA), globally acetylates the chromatin of CTX8 cells and enhances neurogenesis. VPA treatment was found to also maintain or increase acetylation in specific neuronal genes, such as Ascl1. In addition, several microRNAs thought to play a role in neurogenesis were also epigenetically regulated after VPA treatment. Finally, through the combination of gene expression and epigenetic analyses, direct programming through exogenous expression of Ascl1, Dlx1 and Dlx5 enhanced neurogenesis in CTX8. Gene expression and epigenetic signature mapping provides us with a deeper understanding of how lineage restriction occurs. Learning the programming rules will assist in directing homogeneous populations of neuronal cells to further probe the mechanisms of neurodegenerative diseases.Ph. D.Includes bibliographical referencesby Christopher L. Ricuper
Fairview Riverside Medical Center Helistop, Minneapolis, Minnesota: Design and Operational Issues
No full textAn analysis of wind conditions and aerodynamic design for the rooftop
helideck of the Fairview Riverside Medical Center, Minneapolis, Minnesota, is
presented, based on an extensive literature search and the examination of current
Federal Aviation Administration and Civil Aviation Authority (United Kingdom)
guidelines. The following points are examined: pilot comments following the opening
of the facility; the advisability of. a model study; the need for field wind
measurements; the configuration of the helideck, including its location on the rooftop,
dimensions, and the size of the air gap under it; and the effects of rotor downwash
and temperature on helicopter power and lift. Recommendations for site
measurement of wind characteristics and additional future work are given.University of Minnesota Hospital FacilitiesFarell, Cesar; Sitheeq, M. Mohamed; Ellis, Christopher R.; Voigt, Richard L. Jr.. (1995). Fairview Riverside Medical Center Helistop, Minneapolis, Minnesota: Design and Operational Issues. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/109290
Heritability and Linkage Analysis of Appendicitis Utilizing Age at Onset
No full textAppendicitis usually afflicts the young, but there is a large tail in the distribution of onset age. The genetics of this disease are still not well understood. A heritability analysis and genome wide linkage analysis of a large twin dataset was undertaken. Treating age of onset of appendicitis as a censored survival trait revealed a heritability of 0.21, and found evidence of linkage to Chromosome 1p37.3. Author(s): Christopher Oldmeadow 1 * | Kerrie Mengersen 2 | Nicholas Martin 3 | David L. Duffy
"Historian of the spirit": an introduction to the life and ideas of Christopher H. Dawson, 1889-1970
No full textWhat follows is an intellectual biography of the English Catholic historian Christopher Henry Dawson (1889-1970). If there is one overarching thesis to this dissertation, it is that Dawson's place within the history of Britain and the United States and within the historical academy in general has been hitherto underappreciated as a result of unfair categorization of his work by critics, and equally unhelpful credulous assessments imd subsequent politicization of his scholarship by overzealous admirers. Even though his perspectives will probably never be completely embraced by the historical academy due to current trends in historiography, it is hoped that this dissertation will demonstrate that Dawson’s scholarship is deserving of study because of the breadth of his intellectual and practical activity in Britain during the twentieth century, and his groundbreaking role in identifying the importance of culture and religious belief to historiography. The introduction includes a review of the most important secondary literature about Dawson that will be used throughout the work. The main text of the dissertation develops chronologically, and is in eight parts, each part representing a distinct phase of Dawson's life. Part Chie (1889-1914) examines the formative years of his childhood, his education, his conversion to the Roman Catholic Church, and how his experiences formed the basis for his opinions about history, religion, and world around him. Part Two (1915-1929) explores the schools of thought that shaped Dawson’s ideas as a young scholar, and the ideas expressed in his first two books. Part Three (1930-1934) represents the most active time of Dawson's career, and the period during which he became a widely read Catholic intellectual and historian of Europe. Part Four (1935-1939) examines Dawson's commentaries on European political movements during the 1930ร. Part Five (1940-1945) discusses Dawson's role as the vice-president of die wartime ecumenical movement 'The Sword of the Spirit', as well as his book written at the height of the Movement's success. Part Six (1946-1952) covers Dawson's ideas from his Gifford Lectures, and his interest in American Catholicism. Part Seven (1953-1962) covers Dawson's vision for American Catholics and education, and his position at Harvard University, which he held from 1958 until a series of strokes forced him to retire, and return to England in 1962. Part Eight (1963-1970) briefly discussed the events of the last years of his life. The conclusion serves as a summary of his contribution and legacy as a major twentieth-century intellectual
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