7,630,166 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
Significance of nannoplankton in primary production of the Ross Sea, Antarctica, during the 1972 Austral Summer
No full textDuring Eltanin Cruise 51 (January-February 1972), hydrographic features, phytoplankton standing crop, and primary production were determined between New Zealand and the Ross Ice Shelf. Four geographical regions with unique physical/chemical characteristics were delineated. They were the Subantarctic (SA), Antarctic Convergence (AC), Antarctic (AA), and Ross Ice Shelf (RIS) regions. Nannoplankton contribution to total phytoplankton standing crop (Chl a) and total primary production (C����� uptake) was measured by a fractionation process utilizing 10 (subscript "mean" symbol) mesh screens to separate the net and nannoplankton components. Mean phytoplankton standing crop values, integrated to 200 m, for the SA, AC, AA, and RIS regions were 23.62, 35.08, 51.41, and 96.37 mgChl a/m��, respectively. Nannoplankton accounted for 76.2%, 88.6%, and 64.9% of the standing crop in these respective areas. A significant correlation was found between the total phytoplankton standing crop in surface samples and standing crop estimates integrated over the water column. However, no correlation was found between size competition of the surface standing crop and that of the euphotic zone. Mean estimates of total phytoplankton production in the euphotic zone for the SA, AA, and RIS regions were 5.72, 6.18, and 9.97 mg/m��/hr. Nannoplankton production remained relatively constant in these regions, accounting for 90.2%, 67.0%, and 54.0% of total production in the respective regions. The increased phytoplankton standing crop and primary production observed in waters south of the Antarctic Convergence were accounted for by increases in the net plankton fraction. Average photosynthetic indexes (PI) were calculated for the total phytoplankton and the nannoplankton fraction. Significant estimates of 0.351 (P=.01) and 0.243 (P=.1) were obtained for the total PI and nannoplankton PI, respectively
Conservation in an Islamic context a case study of Makkah
No full textThe Holy Qu’ rān contains many injunctions for Muslims to respect and conserve the natural environment but few address the built environment. Habitat at the time of the Prophet (PBOH) was in the vernacular and relatively impermanent. The first habitat was the cave, the second the tent and then simple flat roofed buildings of post and lintel construction made of mud and rubble. Later buildings were not indigenous but reflected the architectural styles and techniques of Muslim pilgrims from beyond the Arabian Peninsula. Permanent exotic buildings were later erected as reminders of holy places and events. This work advances a case to restore and preserve historic and religious sites in Makkah, Saudi Arabia. Makkah is the destination for millions of Muslim pilgrims who annually pay homage to Allah during the occasions of Hajj, Ramadan and Umra. The tranquillity and peaceful ambience that one associates with the holiest of Islamic experiences have, over the years, given way to jostling crowds of people who must be expediently housed, fed, transported, and protected. Due to the lack of planning and the insensitive but profitable development of the city, Makkah is in grave danger of becoming a bustling metropolis instead of a sanctuary where pilgrims gather to perform their religious rites and reaffirm their dedication to Allah. The author calls for professional planning and international cooperation to guide future development for this expanding and sensitive area. The author's ideas are grounded in practical and aesthetic study, therefore, the political, environmental and economic issues are examined in relationship to religious, historic and artistic values. The author makes proposals for a future Makkah that would provide pilgrims with the physical comforts, security, and serene environment they deserve—without destroying the city they came to visit. The author discusses preservation and conservation in the western world and the need for their acceptance in Muslim countries, the former being an aesthetic and intellectual concept sustained by law and the latter being the prescribed free expression of the individual unhindered by material considerations. Both worlds are rapidly being overwhelmed by materialism, but body, mind and spirit combine in making us aware of our surroundings and the way in what we see around us has come into being
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
Remote sensing of ocean color in the northern Gulf of Mexico
No full textTypescript (photocopy).Remote sensing of ocean waters, using the Nimbus-7 Coastal Zone Color Scanner (CZCS), in the northern Gulf of Mexico during a 17 month period (November 1978 - March 1980) showed large variability in the spatial and temporal distributions of pigment fronts. Twenty-nine atmospherically- and geometrically-corrected CZCS orbits were processed into total pigment (chlorophyll a plus phaeopigments) images. A correction factor of 1.67 was applied to the pigment concentrations to correct for the tendency of the standard fluorometric method to underestimate chlorophyll a concentrations. Entrainment of coastal waters offshore was a dominant feature throughout the study. Intrusion of the Loop Current and its effect on surrounding waters was easily observed in the pigment imagery. The mean pigment concentration for the 17 month survey was 3.30 [plus or minus] 1.45 mg m^-3. Both the spring (March) and the fall (October) phytoplankton blooms were documented in the imagery, although precise dates for these maxima could not be determined due to the spacings between usuable CZCS orbits. A comparison was made between 7 thermal (CZCS channel 6) and pigment images. At times, the sea surface temperature expressions coincided with pigment gradients. In general, pigment imagery showed structural features not readily discernible in the thermal imagery. Development of a primary productivity algorithm was investigated using historical ground truth data on primary productivity, chlorophyll a concentration, sea surface temperature, and day length. Results indicated that, using these variables, a multiple regressions model could only describe 15% of the variability in production; therefore, a productivity algorithm was not applied to the remotely sensed pigment and thermal data. Conversion of the mean pigment concentration to production was calculated, with results ranging from 237 to 663 g C m^-2 yr^-1 depending on the regressions selected
Spatial variability of phytoplankton in relation to the distributional patterns of Krill (Euphausia superba)
No full textTypescript (photocopy).The role of krill (Euphausia superba) in influencing the spatial variability of phytoplankton is examined. Data were collected during a cruise of the S.A. Agulhas (10 February - 20 March l981) in the area between 15(DEGREES)- 30(DEGREES) east and 60(DEGREES)- 70(DEGREES) south. Krill density and swarm characteristics (number, size, and biomass) were estimated acoustically. Data on phytoplankton biomass, productivity and species composition, together with data on the physico-chemical environment were obtained from discrete water samples collected from either 7 or 8 depths between 0-100 m at a total of 37 stations. Correlation, multiple regression, and canonical analyses are applied to the station data to examine interrelationships between the variables. Phytoplankton biomass is inversely correlated with mean krill density but positively correlated with the biomass of individual swarms. A positive correlation between krill density and the relative amounts of phaeo-pigments in the > 20- m size fraction of phytoplankton suggests that krill selectively feed on larger cells. The application of spectral analysis to continuous horizontal profiles of integrated krill density, surface seawater temperature, and in vivo fluorescence reveals that, over the range of 4-20 km, the variability in phytoplankton biomass is largely determined by physical processes. However, the steepness of the fluorescence variance spectrum relative to the temperature spectrum, together with consistent coherence between the phytoplankton and krill profiles suggest that predator-prey interactions are of importance in determining the distributional patterns of the phytoplankton
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
Seasonal abundance of Tetranychus urticae and Amblyseius swirskii (Acari: Tetranychidae and Phytoseiidae) on four strawberry cultivars
No full textFahim, Shimaa F., El-Saiedy, El-Sayed M. (2021): Seasonal abundance of Tetranychus urticae and Amblyseius swirskii (Acari: Tetranychidae and Phytoseiidae) on four strawberry cultivars. Persian Journal of Acarology 10 (2): 191-204, DOI: 10.22073/pja.v10i2.6366
Study of Firmicutes and Bifidobacterium phyla in Patients with Type 2 Diabetes mellitus
No full textStudy of Firmicutes and Bifidobacterium phyla in Patients with Type 2 Diabetes mellitu
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