1,310 research outputs found
Blue Compact Dwarf Galaxies in the W Cloud of Virgo
No full textAs part of our study of Blue Compact Dwarf (BCD) galaxies in the Virgo Cluster (Hoffman et al. 1988), we have examined how location in the Cluster affects the properties of these objects. For a source list, we used the Virgo Cluster Catalog by Binggeli, Sandage, and Tammann (1987), which contains 64 objects classified as “BCD” with varying degrees of uncertainty. A neutral hydrogen survey at Arecibo and a subsequent spectroscopic survey with the Palomar 5-meter reflector (in addition to other sources), have yielded 35 detections at heliocentric redshift V_⊙ < 3000 km s⁻¹, and 26 in the background (Hoffman et al. 1987, Helou and Schombert 1988, Schulte-Ladbeck and Cardelli 1987), leaving only three objects with unknown redshifts
Monetary policy and macroeconomic stability in GCC countries - by Rana Sami El Helou
No full textProject (M.A.F.E.)--American University of Beirut, Dept. of Economics, 2006.Bibliography: leaves 77-79.The first and introductory chapter will describe the Gulf Cooperation Council (G CC) and the objectives of the research. The second chapter of this research will be an overview of monetary policies in the six countries that are members of GC C. It will d
Identification, characterization and cytogenetic mapping of a yeast Vps54 homolog in rat and mouse
No full textA novel gene, VPS54-like (Vps54l), is described in the rat that is homologous to the yeast Vps54 gene which is known to be involved in intracellular protein sorting. Furthermore, Vps54-related sequences of human, mouse, Drosophila melanogaster, Caenorhabditis elegans and Arabidopsis thaliana could be identified in the EMBL/GenBank/DDBJ database. Each of the deduced amino acid sequences of the VpS54 genes in these species contain a coiled-coil region and eight to 13 dileucine motifs. The rat Vps54l gene could be mapped to the end of chromosome 14 by radiation hybrid analysis 7 cR(3000) from the D14Rat22 marker and to 14q22 by fluorescence in situ hybridization. Using a rat Vps54l-containing P1-derived artificial chromosome (PAC) clone the respective ortholog was mapped to chromosome 11A3 in the mouse. In addition, the rat genome contains, a processed pseudogene of Vps54l on chromosome 7q22. PAC clone analysis shows that the rat Vps54l gene maps close to the UDP-glucose-pyrophosphorylase 2 gene. The two genes are in tail to tail orientation with their polyadenylation sites 497 bp apart. Rat Vps54l appears to be expressed ubiquitously, but at a relatively low level. Alternatively spliced transcripts could be isolated which lack the sequence coding for the coiled-coil region. (C) 2002 Elsevier Science B.V. All rights reserved
Infant Educational archaeological method: "We do not know. We do not want to know”
No full textEn el presente trabajo expondremos un recorrido conceptual por el Método Arqueológico Educativo Infantil, que estamos componiendo en nuestra Escuela donde somos docentes y directivos y coordinadores del espacio de Filosofía Infantil, haciendo hincapié en las problemáticas de la educación filosófica, la ciudadanía y la infancia. Para ello, asimismo, daremos cuenta de los conceptos que nos sustentan en nuestro trabajo: los trabajos de G. Agamben, G. Deleuze, W. Kohan, J. Larrosa, entre otros. Nuestra exposición estará dividida en tres apartados, el primero “Método arqueológico educativo infantil: ¿educación filosófica?”; el segundo, “Infancia: ¿escuela filosófica?”; y el tercero y último "¿Ciudadanías infantiles? ¿Infancias ciudadanas?"In the present work we will present a conceptual tour through the Infant Educational Archaeological Method, which we are composing in our School where we are teachers and managers and coordinators of the Children's Philosophy space, emphasizing the problems of philosophical education, citizenship and childhood. For this, also, we will give an account of the concepts that sustain us in our work: the works of G. Agamben, G. Deleuze, W. Kohan, J. Larrosa, among others. Our exhibition will be divided into three sections, the first "Infant Educational Archaeological method: philosophical education?"; the second, "Childhood: philosophical school?"; and the third and last "Citizenship for children? citizen infants?Fil: Magallanes, Romina. Universidad Nacional de Rosario. Facultad de Humanidades y Artes. Instituto de Estudios Críticos en Humanidades. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Estudios Críticos en Humanidades; ArgentinaFil: Helou, Laura Silvia. No especifíca;Fil: Monzón, Carolina Elizabeth. No especifíca;Fil: Russo, Jorgelina. No especifíca
The challenging management of cardiac involvement in systemic sarcoidosis
No full textA 34 year-old young man came to our attention after an occasional finding of complete AV block. We made the diagnosis of systemic sarcoidosis with cardiac involvement through an FDG-PET even with a normal CMR. We started corticosteroid therapy and we decided to follow-up the patient through an implantable loop recorder (ILR). Beyond an initial regression of the AV block, after 8 months the ILR revealed AV block and pauses more than 3 s during the day; a new FDG-PET evidenced FDG uptake in new areas of left ventricle. Hence we started infliximab and implanted a dual chamber ICD
The ISO Perspective on Normal Galaxies
No full textBased on results from the first half of its mission, ISO (Kessler et al. 1996) is contributing to our understanding of normal galaxies by offering effective gauges of the physical conditions within the interstellar medium (ISM) of galaxies. ISO data permit a more precise and detailed characterization of the radiation, dust and gas deep within many more galaxies than had been previously possible. This in turn yields new insight into the regulation mechanisms of star formation and galaxy evolution. Apart from these ISM diagnostics, ISO also contributes a vastly improved empirical description of galaxies at all infrared wavelengths, which will be critical in guiding the search for the origins and early life of galaxies
Age-specific relationship of aortic pulse wave velocity with left ventricular geometry and function in hypertension.
No full textAortic pulse wave velocity (PWV), generally considered an intrinsic marker of arterial stiffness, might depend in part on the velocity of myocardial fiber shortening, but the relation between PWV and myocardial function in humans has been understudied. A total of 237 untreated hypertensive subjects over a wide age range (18 to 88 years) underwent aortic PWV determination and echocardiography, from which the mean velocity of circumferential fiber shortening was calculated as a measure of the velocity of myocardial shortening, and relative wall thickness was taken as a measure of left ventricular concentric remodeling. Patients were divided in 3 age groups (or=60 years). In the young, aortic PWV was directly associated with heart rate-corrected velocity of circumferential fiber shortening (r=0.39; P=0.002) but not to relative wall thickness (r=-0.01; P=0.95). The opposite was found in the older group, in which aortic PWV was accompanied by a concentric left ventricular geometric pattern (r=0.44 with relative wall thickness; P=0.009) and a reduced velocity of circumferential fiber shortening (r=-0.54; P<0.001) and stress-corrected midwall fractional shortening (r=-0.56; P<0.001). Intermediate values were found in the middle-aged group (r=0.23; P<0.01 with relative wall thickness; r=-0.07, P value not significant with velocity of circumferential fiber shortening). In conclusion, the relation between aortic PVW and the left ventricle is strongly age dependent. These data suggest that, in young people, aortic PWV is partly determined by an increased velocity of myocardial shortening. With increasing age, a relationship between aortic PWV (as a measure of arterial stiffness) and left ventricular concentric geometry emerges, which ultimately leads to a depressed ventricular systolic function
Soot particle size distribution measurements in a turbulent ethylene swirl flame
No full textThere is a need to better understand particle size distributions (PSDs) from turbulent flames from a theoretical, practical and even regulatory perspective. Experiments were conducted on a sooting turbulent nonpremixed swirled ethylene flame with secondary (dilution) air injection to investigate exhaust and in-burner PSDs measured with a Scanning Mobility Particle Sizer (SMPS) and soot volume fractions (f v ) using extinction measurements. The focus was to understand the effect of systematically changing the amount and location of dilution air injection on the PSDs and f v inside the burner and at the exhaust. The PSDs were also compared with planar Laser Induced Incandescence (LII) calibrated against the average f v . LII provides some supplemental information on the relative soot amounts and spatial distribution among the various flow conditions that helps interpret the results. For the flame with no air dilution, f v drops gradually along the centreline of the burner towards the exhaust and the PSD shows a shift from larger particles to smaller. However, with dilution air f v reduces sharply where the dilution jets meet the burner axis. Downstream of the dilution jets f v reduces gradually and the PSDs remain unchanged until the exhaust. At the exhaust, the flame with no air dilution shows significantly more particles with an f v one to two orders of magnitude greater compared to the Cases with dilution. This dataset provides insights into soot spatial and particle size distributions within turbulent flames of relevance to gas turbine combustion with differing dilution parameters and the effect dilution has on the particle size. Additionally, this work measures f v using both ex situ and in situ techniques, and highlights the difficulties associated with comparing results across the two. The results are useful for validating advanced models for turbulent combustion
Myocardial perfusion in patients with a totally occluded left anterior descending coronary artery reinjected by a normal right coronary artery: The role of collateral circulation
No full textIn this article, myocardial perfusion in patients with a totally occluded left anterior descending artery reinjected by a normal right coronary artery is assessed using stress single photon emission computed tomography (SPECT). In all, 20 patients, with a totally occluded left anterior descending artery reinjected by normal right coronary artery, underwent myocardial single photon emission computed tomography imaging within 60 days of angiography. All patients had abnormal perfusion single photon emission computed tomography results and 70percent had reversible defects. Perfusion defects at rest were present in 75percent of patients, with perinecrotic residual ischemia in 45percent of patients whereas for 30percent of patients, no viable myocardium was detected in the collateral-dependent segments. In all, 25percent of patients had no resting perfusion defects but all are presented with stress-induced ischemia. Collaterals are not protective against stress-induced ischemia, but they can preserve myocardial viability. This conclusion is highly supported by the presence of residual ischemia in the collateral-dependent segments. © 2008 Sage Publications.Aboul-Enein F, 2004, J NUCL MED, V45, P950; AKUTSU Y, 1995, INT J CARDIOL, V51, P47, DOI 10.1016-0167-5273(95)02396-E; Eriksen UH, 2002, CLIN CARDIOL, V25, P340, DOI 10.1002-clc.4950250707; Fujita M, 2004, HEART, V90, P246, DOI 10.1136-hrt.2002.007989; Fukai M, 2000, J Cardiol, V35, P103; HABIB GB, 1991, CIRCULATION, V83, P739; He ZX, 2001, J NUCL CARDIOL, V8, P452, DOI 10.1067-mnc.2001.114799; ISKANDRIAN AS, 1982, CIRCULATION, V65, P242; Koerselman J, 2003, CIRCULATION, V107, P2507, DOI 10.1161-01.CIR.0000065118.99409.5F; KOLIBASH AJ, 1982, AM J CARDIOL, V50, P230; Lee CW, 2000, J AM COLL CARDIOL, V35, P949; MCFALLS EO, 1993, EUR HEART J, V14, P336; Nicolau JC, 1997, INT J CARDIOL, V61, P47, DOI 10.1016-S0167-5273(97)00134-4; NIENABER CA, 1990, AM J CARDIOL, V65, P991, DOI 10.1016-0002-9149(90)91002-N; Pohl T, 2001, J AM COLL CARDIOL, V38, P1872, DOI 10.1016-S0735-1097(01)01675-8; Popma J. J., 2001, HEART DIS TXB CARDIO, P387; SAMBUCETI G, 1995, J AM COLL CARDIOL, V26, P615, DOI 10.1016-0735-1097(95)00209-M; Schaper W, 2003, ARTERIOSCL THROM VAS, V23, P1143, DOI 10.1161-01.ATV.0000069625.11230.96; Tayebjee MH, 2004, QJM-INT J MED, V97, P259, DOI 10.1093-qjmed-hch053; TUBAU JF, 1981, AM J CARDIOL, V47, P27, DOI 10.1016-0002-9149(81)90285-X; VANOVERSCHELDE JLJ, 1993, CIRCULATION, V87, P1513; WAINWRIGHT RJ, 1980, BRIT HEART J, V43, P47; Werner GS, 2007, HEART, V93, P778, DOI 10.1136-hrt.2006.108159; Werner GS, 2005, AM HEART J, V149, P129, DOI 10.1016-j.ahj.2004.04.042; Werner GS, 2001, CIRCULATION, V104, P2784, DOI 10.1161-hc4801.10035252
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