8,806,679 research outputs found
Interview of Sayed Z. El-Sayed by Brian Shoemaker
No full textDr. Hussein Fausi, pp. 2
Professor Abdel Fatah Mohammed, pp. 2
Dr. Richard Van Cleef, pp. 3
Dr. Richard Flemming, pp. 3
Haupt ______, pp. 3
Ravel _______, pp. 3
Shepard ______, pp. 3
Claude du Bear, pp. 3
Walter Monk, pp. 3
Peter Ray, pp. 3
Captain Luis R. Capurro, pp. 6-7
Byunig Don Lee, pp. 8, 22
Dr. Martin Johnson, pp. 9
Captain Canepa, pp. 9-10
Larry Gould, pp. 10
______Zumberg, pp. 10
Lee Washbrun, pp. 10
George Llano, pp. 10, 15, 23-24, 30
Professor Mosby, pp. 12
Richard Thornton, pp. 13
_______Allsion McQueeny, pp. 15
Dr. Morita, pp. 15, 23
Claude Zumell, pp. 16
Holm Henson, pp. 16, 23
Larry Weber, pp. 19
_______Filchner, pp. 22
_______Shackelton, pp. 22
Mary Alice ________, pp. 22-23
George Knox, pp. 28
Dr. Numoto, pp. 29
Lou de Galle, pp. 29
Dick Laws, pp. 29, 37, 42, 64, 66
Joe Farnham, pp. 34, 63
Carol ________, pp. 35
Todd ________, pp. 40
Lubimora ______, pp. 40
Professor Bogdanor, pp. 41
__________ Kryzechevski, pp. 42
Barry Heywood, pp. 42, 65
David Drury, pp. 43
Martin Johnson, pp. 46
Carl Stegan, pp. 54
Sherwood Roland, pp. 55
Mario Mornina, pp. 55
Paul Ramsey, pp. 55-56
Bob Stephenson, pp. 60
Paul Skelly Powers, pp. 60
Charlie Inge, pp. 60
_________ Hovis, pp. 60
Emil Anderson, pp. 61
Admiral Bill Ramsey, pp. 62
Dean Stockwell, pp. 62
Bernard Stonehouse, pp. 64
Bob Abel, pp. 67Dr. El-Sayed was born in Alexandria, Egypt. After secondary school, he went to the University of Alexandria for his B.S. (1949) in Oceanography. After his M.S., he went to the Scripps Institute of Oceanography on a Fulbright Fellowship. He received his PhD from the University of Washington. As professor emeritus at Texas A & M, he directs a project with the Cooperative Marine Research Program in the Middle East. A friend asked him to work on a biological project on Drake Passage, Antarctica.
He worked for several years on vessels from Argentina and was later assigned to a ship for the study of krill. The science team included specialists interested in different aspects of the ecosystem. This was the first of many trips, including those on the Atlantic Ocean, Pacific Ocean, and Indian Ocean. He wrote the book “The Historical Perspective of the Antarctic Marine Research.” This book addresses the studies on the productivity of krill, in addition to phytoplankton and how solar radiation, nutrients, and the depletion of the ozone affected the marine ecosystem. The UVB radiation had a deleterious effect on the survival of the phytoplankton and nanoplankton.
Dr. El-Sayed describes his associations with SCAR, BIMASS, SCORE, and other research organizations. He summarizes the phasing out of CFCs production. Because some phytoplankton are inhibited by solar radiation, the maximum concentration of chlorophyll is between 10 and 20 meters. As a member of the Nimbus Experimental Team, Dr. El-Sayed used the coastal zone color scanner to study the krill ecosystem.
Major Topics
The University of Alexandria
The Scripps Institute of Oceanography
The University of Washington
Texas A & M University
Cooperative Marine Research Program in the Middle East
Drake Passage in Antarctica
Phytoplankton and nanoplankton on the Filchner Ice Shelf
Water currents in the Weddell Sea
Changes in the krill population
The formation of SCAR’s Marine Committee
The Antarctic marine ecosystem
Establishment of the first two International BIMASS experiments
The use of satellite images to study marine ecologyFunded by a grant from the National Science Foundation
A sedimentary depositional and diagenetic model of a Pleistocene/Holocene coastal formation in Alexandria, Mediterranean Sea, Egypt
No full textLate Quaternary deposition along the northwest coastal plain of Egypt was influenced by sea level fluctuations as documented by a succession of Quaternary carbonate ridges (up to eight or nine) running parallel to the present shoreline. This study focuses upon depositional and diagenetic aspects related to the last glacial cycle and aims to the reconstruction of the coastal sedimentary paleo-depositional environments of the “Gabal El-Kor Island”, located along the Mediterranean coast of Egypt near Alexandria. The sedimentary succession cropping out at Gabal El-Kor Island is interpreted as a part of the Pleistocene second coastal ridge, dated at about 100 Ka. This study revealed that during the last interglacial period (Marine Isotopic Stage 5, MIS 5), marine deposits mostly made of bioclastic grains and ooids were formed and their early diagenetic alteration was achieved under marine subaqueous conditions. After marine regression, during glacial periods, a phase of subaerial exposure followed. This was associated with transport and accumulation of the exposed carbonate sands from the shore inland by wind action. In the postglacial, the sea level rose up to its present level and a lagoon formed behind Gabel El-Kor Island. The most relevant diagenetic events took place in three distinct stages: MIS 5, between MIS 4 and MIS 2, and during the early and middle Holocene MIS 1. Salient diagenetic events refer to vadose, meteoric, and marine phreatic environments respectively
The Nile Valley of Egypt: A Mayor Active Graben that Magnifies Seismic Waves
No full textThe Nile valley and the Nile delta are part of the active rift that is probably connected with the Red Sea tectonism. This zone is characterized by small-to-moderate size earthquakes that have caused extremely severe damage to recent and historical constructions. The most vulnerable area along the Nile valley is the one of Cairo-Faiyoum. Small local and large distant earthquakes could be a source of huge socio-economic damage in this area. The loose soft alluvial sediments of the Nile Canyon are the main factor behind this potential damage because they may greatly amplify the ground motion, as demonstrated by strong ground motion modelling. The largest amplification is generally concentrated along the edges of the graben and occurs at frequencies between 1 Hz and 2 Hz. This may explain the huge damage caused by distant earthquakes during recent and historical times. The distribution of intensity values during the events of 1926 and 1992 is well correlated with the modelled spatial distribution of the spectral amplification
Deterministic seismic hazard in Egypt
No full textThe regional seismic hazard in Egypt is assessed using a deterministic approach based on the computation of synthetic seismograms at a set of gridpoints located at distances of 0.2 from each other. The main input for this computation are earthquake sources and structural models. The earthquake sources are parametrized using focal mechanisms, seismogenic areas and regional seismicity. A number of deep seismic profiles have been used to define the crustal structures. Similar sets of gravity profiles have been used to define the density of the layers. The peak displacement (DMAX), peak velocity (VMAX) and design ground acceleration (DGA) are chosen and plotted to construct the seismic hazard maps. There are similarities between computed and observed amplitudes of ground motion in terms of their values and spatial distributions. The results obtained from the deterministic and probabilistic approaches are comparable. The areas of high seismic hazard level are of great socio-economic importance
Recent seismicity and realistic waveforms modeling to reduce the ambiguities about the 1303 seismic activity in Egypt
No full textLa formación abierta y a distancia en el SENA. Tomo I
No full textComo parte de la inauguración del programa de formación abierta y a distancia del SENA se recuperan: los discursos del entonces Presidente de la republica “Belisario Betancour” y el director general del Sena “Alberto Galeano Ramírez”, se describe el programa de formación abierta y a distancia, conceptos básicos, aspectos políticos, diseño, operación y evaluación de la formación profesional integral, organización y componentes del programa y materiales y medios para su aplicación.As part of the inauguration of the open and distance training program of SENA, the speeches of the then President of the Republic "Belisario Betancour" and the director general of the Sena "Alberto Galeano Ramírez", describe the open and distance training program , basic concepts, political aspects, design, operation and evaluation of the integral professional formation, organization and components of the program and materials and means for its application.Discurso del Sr. Presidente de la República en la inauguración del programa SENAFAD -- Discurso del Director General del SENA en la inauguración del Programa SENAFAD -- Marco conceptual: Presentación -- Políticas gubernamentales y su incidencia en la formación profesional del SENA – Conceptos básicos -- Criterios para el diseño, la operación y la evaluación de la formación profesional del SENA -- Organización: El programa de formación abierta y a distancia del SENA -- -- La comunicación como instrumento del programa -- Diseño y utilización de materiales y mediosn
A simplified method for computing phase behavior of crude oil-carbon dioxide mixtures
No full textTypescript (photocopy).Phase behavior plays a fundamental role in oil recovery processes, ranging from the production of gas condensate and volatile oil reservoirs to the injection of CO2 and N2 for enhanced oil recovery processes. In phase behavior methods, equilibrium ratios are used to predict compositional changes in the reservoir fluids, particularly when using compositional simulators. Literature search and experience in the phase behavior of CO2 - reservoir oil systems have shown that equations of state and available correlations give acceptable results in some areas, but in general, they are not satisfactory due to lack of accuracy, large computational time, or sometimes yielding trivial solutions. Therefore, accurate, faster and more reliable new methods are needed, particularly for actual compositional studies. In this study, a K-value method is developed. This method, expressed in a simple mathematical form, relates the equilibrium ratios of each component with its boiling temperature, critical temperature and pressure, and the mixture's pressure, convergence pressure and overall compositional changes. This method uses some experimental data for the mixture under study to adjust the form of the K-value expression. These experimental data are obtained from some the routine PVT laboratory tests. A least squares-linear programming optimization routine is adopted to adjust the correlation to match the actual behavior of the mixtures with the calculated. Nine reservoir fluid samples were simulated, four retrograde gas condensate and five oil systems. The K-value method demonstrated good matches with the experimental data for all systems, including crude oil-carbon dioxide mixtures. This method worked well compared to Peng-Robinson and Soave-Redlich-Kwong equations of state for matching the saturation pressures and swollen volumes of four cases of CO2 and N2 injections into crude oil systems. The K-value method was faster than the equations of state by a factor of 7-20. In addition, the K-value method required less computer memory, less input data and fewer parameters to adjust than the equations of state..
Ibraheem Sayed Interview
No full textIbraheem Sayed (Class of 2022) was interviewed by Laura Narvaez on December 16, 2023 via the Zoom internet-based video conferencing software. Sayed was born in Boston, MA in 1999 and attended SMU from 2018 to 2022, where he majored in Accounting. He chose to attend SMU after being blown away by the campus during a high school tour and lived in Armstrong Commons from freshman through senior year, where he also served as a Residential Advisor and was active in the Armstrong Commons Council. Sayed was very focused on academics and discussed his COVID-19 learning experience
Reproductive and productive performance of rabbit does submitted to an oral glucose supplementation
No full textIn order to investigate the effect of different levels of oral glucose supplementation and/or reproductive method on productive
and reproductive performance of New Zealand White (NZW) doe rabbits in the tropic, 36 bucks and 120 doe NZW rabbits were
equally divided among four treatment groups (n59 bucks130 does). The treatments consisted of supplementing drinking
water with 0 (control), 2.5, 5 and 10 g glucose/l, respectively. To study the effect of reproduction method (natural v. artificial),
each group was divided into two sub-groups (naturally mated and artificially inseminated) with the same bucks of the same
treatment group. Glucose supplementation at 5 or 10 g/l of water increased ( P,0.01) litter weight at birth and at weaning,
and litter weight gain during the 4 weeks. However, glucose supplementation at 2.5 or 5.0 g/l water decreased ( P,0.01)
feed consumption from 7 to 14 days after delivery. Glucose supplementation at 2.5 g/l water did not affect productive and
reproductive performance of rabbits. Artificially inseminated does had higher daily litter weight gain between 21 and 28 days
post partum. Artificially inseminated group had better milk conversion during the 1st and 4th week as compared to naturally
mated groups. Compared with the control group, the economic efficiency and performance index of NZW rabbits was
significantly improved by 5 g glucose supplementation under tropic condition
Size Effect on Concrete Shear Strength in Beams Reinforced with FRP Bars
No full textThe understanding of size effect on the concrete shear strength of beams reinforced with fiber-reinforced polymer (FRP) bars is of fundamental and practical significance. The calibration and verification of the ACI 440 shear design algorithm has been mainly based on experimental results from specimens with a maximum effective depth of 360 mm (14.19 in.), which are not always representative of large-scale applications. In this paper, the results of laboratory tests on scaled FRP-reinforced concrete beams without shear reinforcement, having a maximum effective depth of 883 mm (34.75 in.), are presented. Based also on results available in the literature for normal-strength concrete, the scaling of strength is discussed in relation to effective depth, reinforcement ratio, aggregate size, and presence of minimum shear reinforcement and longitudinal skin reinforcement. Representative North American design algorithms that account for the shear force being resisted primarily by the uncracked concrete in compression (ACI) and through aggregate interlock (CSA) are then assessed
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