Institution
Khalifa University
Education•Abu Dhabi, United Arab Emirates•
About: Khalifa University is a education organization based out in Abu Dhabi, United Arab Emirates. It is known for research contribution in the topics: Computer science & Adsorption. The organization has 3752 authors who have published 10909 publications receiving 141629 citations.
Topics: Computer science, Adsorption, Population, Membrane, Cloud computing
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the authors demonstrated that careful structural designs can exploit environmental energy to enhance the performance of an interfacial solar vapor generation device to well above the theoretical limit of vapor output, assuming 100% solar-to-vapor energy transfer efficiency, under various light intensities.
433 citations
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TL;DR: In this paper, powder bed fusion technology was employed to fabricate the cellular structures of various relative densities out of Maraging steel, and compressive testing was performed to deduce the mechanical properties of the considered cellular structures.
Abstract: Recent advances in additive manufacturing facilitated the fabrication of parts with great geometrical complexity and relatively small size, and allowed for the fabrication of topologies that could not have been achieved using traditional fabrication techniques. In this work, we explore the topology-property relationship of several classes of periodic cellular materials; the first class is strut-based structures, while the second and third classes are derived from the mathematically created triply periodic minimal surfaces, namely; the skeletal-TPMS and sheet-TPMS cellular structures. Powder bed fusion technology was employed to fabricate the cellular structures of various relative densities out of Maraging steel. Scanning electron microscope (SEM) was also employed to assess the quality of the printed parts. Compressive testing was performed to deduce the mechanical properties of the considered cellular structures. Results showed that the sheet-TPMS based cellular structures exhibited a near stretching-dominated deformation behavior, while skeletal-TPMS showed a bending-dominated behavior. On the other hand, the Kelvin and Gibson-Ashby strut-based topologies exhibited a mixed mode of deformation while the Octet-truss showed a stretching-dominated behavior. Overall the sheet-TPMS based cellular structures showed superior mechanical properties among all the tested structures. The most interesting observation is that sheet-based Diamond TPMS structure showed the best mechanical performance with nearly independence of relative density. It was also observed that at decreased volume fractions the effect of geometry on the mechanical properties is more pronounced.
426 citations
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Massachusetts Institute of Technology1, Harvard University2, University of Calabria3, Khalifa University4, Colorado School of Mines5, New Mexico State University6, University of Oklahoma7, United States Environmental Protection Agency8, University of Arizona9, University of Auckland10, National University of Singapore11
TL;DR: Challenges still facing membrane-based potable reuse applications, including chemical and biological contaminant removal, membrane fouling, and public perception, are highlighted as areas in need of further research and development.
421 citations
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TL;DR: A comprehensive review on the state-of-the-art of piezoelectric energy harvesting is presented in this paper, where the authors present the broad spectrum of applications of piezolectric materials for clean power supply to wireless electronics in diverse fields.
418 citations
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TL;DR: This work studies the downlink sum rate maximization problem, when the NOMA principle is applied, and the conditions under which the achievable rates maximization can be further simplified to a low complexity design problem, and compute the probability of occurrence of this event.
Abstract: Non-orthogonal multiple access (NOMA) systems have the potential to deliver higher system throughput, compared with contemporary orthogonal multiple access techniques. For a linearly precoded multiple-input single-output (MISO) system, we study the downlink sum rate maximization problem, when the NOMA principle is applied. Being a non-convex and intractable optimization problem, we resort to approximate it with a minorization-maximization algorithm (MMA), which is a widely used tool in statistics. In each step of the MMA, we solve a second-order cone program, such that the feasibility set in each step contains that of the previous one, and is always guaranteed to be a subset of the feasibility set of the original problem. It should be noted that the algorithm takes a few iterations to converge. Furthermore, we study the conditions under which the achievable rates maximization can be further simplified to a low complexity design problem, and we compute the probability of occurrence of this event. Numerical examples are conducted to show a comparison of the proposed approach against conventional multiple access systems.
403 citations
Authors
Showing all 3860 results
Name | H-index | Papers | Citations |
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Xavier Estivill | 110 | 673 | 59568 |
Gordon McKay | 97 | 661 | 61390 |
Muhammad Imran | 94 | 3053 | 51728 |
Muhammad Shahbaz | 92 | 1001 | 34170 |
Paul J. Thornalley | 89 | 321 | 27613 |
Paolo Dario | 86 | 1034 | 31541 |
N. Vilchez | 83 | 133 | 25834 |
Andrew Jones | 83 | 695 | 28290 |
Christophe Ballif | 82 | 696 | 26162 |
Khaled Ben Letaief | 79 | 774 | 29387 |
Muhammad Iqbal | 77 | 961 | 23821 |
George K. Karagiannidis | 76 | 653 | 24066 |
Hilal A. Lashuel | 73 | 233 | 18485 |
Nasir Memon | 73 | 392 | 19189 |
Nidal Hilal | 72 | 395 | 21524 |