397 research outputs found
CCD polarimetry as a probe of regions of recent star-formation
No full textChapter 1 of this thesis details the incorporation of a Charged Coupled Device (CCD) detector system with the Durham Imaging Polarimeter. The details include the physical characteristics of the device and the electronics and software associated with the device control and data storage. The introduction of the CCD detector system haa made necessary the inclusion of a super-achromatic half-wave plate in the polarimeter which has an inherent variability in its optic axis. Chapter 2of this work describes fully how suitable corrections for this effect can be made, and derives "first order" results. The CCD performance is examined in comparison with the detector used previously and hence the veracity of the new results is established. Chapter 3 is a relevant summary of the status of the astronomy of the immediate regions of recent star-formation. Chapter 4 describes multicolour polarimetry of NGC2261/R Mon covering the period 1979 to 1986. The data conclusively proves that the polarisation of R Mon must be due to effects close to R Mon (~ 14 astronomical units). This is evident because of the dynamic timescale of the variations of the polarisation of R Mon and the anomalous band of polarisations seen across the head of the nebula. The interpretation presented is an extension of the Elsasser and Staude (1978) method of polarising objects embedded within the confines of a nearly edge-on disk. Detailed polarisations within the main nebula body provide evidence for this extended interpretation and also for an extensive helical magnetic field which may extend into the disk. Also it is seen that R Mon must still be "shrouded" in material preventing light from directly reflecting in the main nebula body. It is not thought that the variations in the region close to R Mon are due to planetary bodies but to accretion from the disk. The results of this re-interpretation of the polarising mechanism are tentatively applied to other similar objects
The formation of English Gothic: architecture and identity
No full textBook synopsis: In this original account of architecture in England between c.1150 and c.1250, Peter Draper explores how the assimilation of new ideas from France led to an English version of Gothic architecture that was quite distinct from Gothic expression elsewhere. The author considers the great cathedrals of England (Canterbury, Wells, Salisbury, Lincoln, Ely, York, Durham, and others) as well as parish churches and secular buildings, to examine the complex interrelations between architecture and its social and political functions. Architecture was an expression of identity, Draper finds, and the unique Gothic that developed in England was one of a number of manifestations of an emerging sense of national identity.\ud
The book inquires into such topics as the role of patrons, the relationships between patrons and architects, and the wide variety of factors that contributed to the process of creating a building. With 250 illustrations, including more than 50 in color, this book offers new ways of seeing and thinking about some of England’s greatest and best-loved architecture
The c-Jun kinase signaling cascade promotes glial engulfment activity through activation of draper and phagocytic function
No full textCo-author Johnna Doherty is a student in the Neuroscience program in the Morningside Graduate School of Biomedical Sciences (GSBS) at UMass Medical School, and Jennifer MacDonald is in the MD/PhD program.After neuronal injury or death glial cells become reactive, exhibiting dramatic changes in morphology and patterns of gene expression and ultimately engulfing neuronal debris. Rapid clearance of degenerating neuronal material is thought to be crucial for suppression of inflammation and promotion of functional recovery. Here we demonstrate that Drosophila c-Jun N-terminal kinase (dJNK) signaling is a critical in vivo mediator of glial engulfment activity. In response to axotomy, we find glial dJNK signals through a cascade involving the upstream mitogen-activated protein kinase kinase kinases Slipper and Tak1, the mitogen-activated protein kinase kinase MKK4, and ultimately the Drosophila activator protein 1 (AP-1) transcriptional complex composed of Jra and Kayak to initiate glial phagocytosis of degenerating axons. Interestingly, loss of dJNK also blocked injury-induced upregulation of Draper levels in glia, and glial-specific overexpression of Draper was sufficient to rescue engulfment defects associated with loss of dJNK signaling. This work identifies that the dJNK pathway is a novel mediator of glial engulfment activity and a primary role for the glial Slipper/Tak1short right arrowMKK4short right arrowdJNKshort right arrowdAP-1 signaling cascade appears to be activation of draper expression after axon injury.Cell Death and Differentiation advance online publication, 26 April 2013; doi:10.1038/cdd.2013.30.MD/PhDNeuroscienc
Duplication of Serial Set publications in the American State Papers: an annotated inventory part II
No full textArticle and Appendixes: Finance, Military Affairs, Naval Affairs, Public Lands, and Claims tables.The American State Papers collection of Congressional and Executive Branch publications, which in total number more than 6,300 documents, not only covers the fourteen Congresses before the initiation of the Congressional Serial Set in Dec. 1817 but for the final three-fifths of the collection overlaps chronologically with the first two decades of the Serial Set. Over 2,650 of the American State Papers publications reprint, with some occasional minor alterations and a few major ones, Reports and Documents originally published in the Serial Set. This paper provides for the first time an annotated list of all those duplicated publications
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Jonathan Spilsbury and the lost Moravian history of William Blake's family
No full textEthical approaches to family planning in Africa
No full textAfrica has historically provided the geographical flashpoint of ethical issues relating to family planning programs. Until recently in Sub-Saharan Africa, advocacy of family planning by non-Africans was unacceptable and by Africans politically inadvisable. This has changed in the 1980s. The health rationale for family planning is backed by strong evidence, especially in Africa, where infant and maternal mortality and morbidity rates are high. Population growth in many African countries impedes development, which cannot keep up with needs. Earlier attempts to offer family planning aid were often politically inept and endangered the needed partnership between donor and developing countries. Theoretical arguments and abstract demographic projections are less persuasive than carefully designed programs geared to the health and well-being of communitities that help plan them. Increased cooperation between donor and developing countries has helped resolve some of the ethical difficulties that beset family planning programs. This report summarizes many of the practical, ethical and cultural considerations in making family planning aid acceptable.Health Monitoring&Evaluation,Adolescent Health,Agricultural Knowledge&Information Systems,Gender and Health,Early Child and Children's Health
The design of a radio altimeter using frequency modulation method
No full textThesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1937 [second author], and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautical Engineering, 1937 [first author].MICROFICHE COPY AVAILABLE IN ENGINEERING.Includes bibliographical references (leaves 108-110).by Shih-Nge Lin, Ieu-Liang Wu.M.S
Book review: The Account Book of the Giles Geast Charity, Tewkesbury, 1558-1891, edited by Daniel C. Beaver. Gloucestershire Record Series Vol. 31. ISBN: 9780900197932
No full textThis is the author accepted manuscript. The final version is available from the publisher via the link in this record
Managing patron-driven acquisitions (PDA) records in a multiple model environment
No full textAcademic libraries have widely embraced patron-driven acquisition (PDA) models for electronic and print books. Vendors supply title level MARC records to facilitate discovery through library catalogs, and managing these records can be challenging. Colorado State University Libraries (CSUL) implemented four PDA models over the past two years. Since these records constitute a growing portion of the collection, CSUL recognizes the importance of developing careful record management policies and workflows to handle various acquisitions models. In this article the author describes the four PDA models, the cataloging policies and processes, and staffing levels needed for managing the records
[bust portrait of Isadore Weil].
No full textPhoto Div C.3 .Jewish Philadelphia.16. Bust portrait of Isadore Weil. Member of the Philadelphia Jewish community. Photographer: Draper & Husted (Philadelphia).; Handwritten on verso. "Isadore Weil, Phila."; Individual and group studio portraits, likely of members of the Philadelphia Jewish community, most identified by manuscript notes on mounts.; Subjects include: Adolph Rosenheim, Dr. Arnold, Mrs. Goldsmith, Sidney M. Stern, Jacob S. Frank, Simon Fleisher, Mayer Fleisher, Rachel Carvalho, Sally Greenwald, Aaron Greenwald, Morris Goldsmith, Isadore Weil, Charles Hoffman, Leo Loeb, Adolph Rosenheim, Eva Friend, Lawrence Friend.; Photographers include: Abraham Bogardus (N.Y.), Frederick Gutekunst (Philadelphia), Gilbert & Bacon (Philadelphia), Peterson Bros. (Chicago), Riker (N.Y.), Draper & Husted (Philadelphia), Frank Jewell (Scranton, Pa.), Henszey & Co. (Philadelphia), J. Brill (N.Y.), E.H. Canfield (Milwaukee), H. & A. Krull (Neustrelitz, Germany), Broadbent & Phillips (Philadelphia), J. Goldin (Washington, D.C.)
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