5,310 research outputs found
Dr. Salim Jahangir ja pir Sayed Mohammed Hassan
No full textDr. Salim jahangir (vas.) ja pir Sayed Mohammed Hassan kotonaan.1 kuultokuva: vär
Afghanistan national development strategy (ANDS) formulation process : influencing factors and challenges
No full textSayed Mohammed Sha
Policymaking in agriculture and rural development in Afghanistan
No full textAdam Pain; Sayed Mohammed Sha
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
Membres dont le décès a été signalé au cours de la session : Jules Gay-Lussac, El-Sayed Mohammed Magdi pacha et René Fourtau
No full textLacau Pierre. Membres dont le décès a été signalé au cours de la session : Jules Gay-Lussac, El-Sayed Mohammed Magdi pacha et René Fourtau. In: Bulletin de l'Institut d'Egypte, tome 3, 1920. pp. 94-96
Afghanistan national development strategy (ANDS) formulation process : influencing factors and challenges / Sayed Mohammed Shah
No full text
Comparing genetic markers' efficiencies for discrimination between two commercially important holothuroids in the Mediterranean Sea, Holothuria polii and Holothuria sanctori
No full textMohammed-Geba, Khaled, Abbas, Eman M., Ahmed, Hamdy O., Shalabi, Mohammed A., Hamed, El Sayed A. E., Abdel Razek, Fatma A., Soliman, Taha (2022): Comparing genetic markers' efficiencies for discrimination between two commercially important holothuroids in the Mediterranean Sea, Holothuria polii and Holothuria sanctori. Zootaxa 5092 (5): 559-575, DOI: https://doi.org/10.11646/zootaxa.5092.5.
Policymaking in agriculture and rural development in Afghanistan / Adam Pain; Sayed Mohammed Shah
No full textDesign of knee joint mechanisms and in-socket sensors for transfemoral amputees / Amr Mohammed El-Sayed Ahmed
No full textLower limb prostheses are developed to assist amputees in restoring mobility functions such as walking, sit-to-stand, stair ascent/descent, and ramp climbing. Although the current prostheses are equipped with sensors, actuators, controllers, and mechanical structures, they require improvements to mimic the function of the natural limbs. The first challenge in prosthetic development is to monitor the amputee/prosthesis interaction by using sensors built into the socket. This interaction helps in detecting the gait phases and events, in addition to develop new control strategies for prostheses, which may enhance the amputees’ comfort. The second challenge is to develop a knee prosthetic mechanism that could imitate the functions of the natural knee.
To accomplish the aims of this thesis, studies were undertaken consecutively. First, the technology of the knee prosthesis was studied to understand the functionality of its components. The technology review showed that the sensory system requires enhancement, in particular, a new sensory system can be added-on to the mechanical sensors to sense the user’s intent, identify the transition between phases, and improve the control performance of the prosthesis. Based on this study, the piezoelectric bimorph (PB) was selected as the sensing element while a linear motor was selected as the most appropriate actuator.
Next, the PB was validated as a sensing element by finding out its characteristics for the intended application. The static and dynamic characteristics of the PB were investigated and tested as an in-socket sensor with a transfemoral amputee to check its ability to sense the movement of the knee prosthesis. Moreover, the PB was tested as an actuation element in an application named microgripper that was capable of grasping a small object. Also, the PB was compared with a force sensitive resistor (FSR) as an in-socket sensor for a transfemoral amputee performing activities such as walking, sit-to-stand, and stair climbing. The PB could track the knee angle at most of the activities, while the FSR could be used as a trigger sensor at different movements.
In the second stage, the focus was on the actuation system and mechanical structure of the knee prosthesis. It was found that, the mechanical actuation system needs improvement in terms of the normal range of motion and the power generation in activities that require extra torque and power. Therefore, a new design of knee prosthesis mechanism that contains a linear actuation system was presented and modeled using a physical modelling tool. The mechanism was physically simulated and controlled using PID controller at activities of daily living (ADL). Finally, an overall control framework of the knee mechanism using in-socket sensor was presented to guide the researchers to develop a knee prosthesis that could be controlled using in-socket sensors.
In conclusion, the study demonstrates the possibility of using the piezoelectric bimorph as an in-socket transducer. Furthermore, a knee prosthesis mechanism was successfully designed, modelled, and tested at ADL. Further, clinical trials are recommended for the knee mechanism upon future development. Moreover, more subjects with different types of sockets may be tested towards improving the functionality of the knee prosthesi
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