Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 60 for “"OBS"”.
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Contention and congestion minimization in OBS networks
Submitted in partial fulfilment for the Masters in Engineering Degree: Electrical Engineering,, Durban University of Technology, Durban, South Africa, 2017.
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Performance Analysis of Congestion Control Schemes in OBS Mesh Networks
Optical Burst Switching (OBS) is a novel idea offering promising solutions for all-optical WDM networks. It combines the best of optical packet switching and wavelength routing while taking into account the limitations of the current all-optical technology. OBS achieves high traffic throughput and …
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Einfluss von Bewirtschaftungsmaßnahmen auf Menge und Zusammensetzung unterschiedlich stabiler Fraktionen der organischen Bodensubstanz
… stabiler Anteile der orgnischen Bodensubstanz (OBS) zu entwickeln und zu klären, ob ein Zusammenhang zwischen Löslichkeit und Stabilität besteht. Darüber hinaus sollen der Einfluss von Bewirtschaftungsmaßnahmen auf Menge und Zusammensetzung dieser OBS-Anteile und Zusammenhänge zwischen Fourier …
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The Determinants of Off-Balance-Sheet Banking Risk: The U.S. and International Evidence
… In order to trace the determinants of OBS guarantees we consider that OBS guarantees in the banking industry as a financial innovation follows a time diffusion trend. In addition to the time trend factor we include a regulation pressure factor to test the bank regulatory hypothesis and …
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Transient oxygen consumption rate measurements with the BDT̳M̳ oxygen biosensor system
… in diabetic mice. The Oxygen Biosensor System (OBS) is a high-throughput, convenient assay that indirectly measures oxygen consumption by measuring oxygen partial pressure, pO2, adjacent to tissue loaded into the OBS multiwell plate. Solving the general species transport equations for a …
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An emission and discard priority scheme for optical burst switched networks
Optical burst switching (OBS) is a promising technology designed to meet the growing demands for internet handwidth and better Quality of Service (QoS). This technology provides all optical and high speed switching to overcome the bottleneck of electronic routers in the core network. In this …
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Improving fairness, throughput and blocking performance for long haul and short reach optical networks
… switching (OCS) and optical burst switching (OBS) for long haul, and datacenter networks. Extensive simulations tests have been conducted to evaluate the effectiveness of the proposed algorithms. These simulation tests were performed over a number of network topologies such as ring, mesh and …
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Regulation of osteoblast activity by Pyk2-targeted approaches
… the mechanism of action of Pyk2 and E2 in OBs. Pyk2-KO OBs showed significantly higher proliferation, matrix formation, and mineralization than WT OBs. In the presence of E2 or raloxifene, a selective estrogen receptor (ER) modulator, both matrix formation and mineralization were further …
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Modeling Cancer Using Li-Fraumeni Syndrome Patient-Derived Induced Pluripotent Stem Cells
… stem cells (MSCs) then to osteoblasts (OBs), the cells from which osteosarcomas originate. Interestingly, LFS iPSC-derived osteoblasts recapitulated the osteosarcoma phenotype, creating “a bone tumor in a dish”. This “tumor in a dish” platform proved that LFS is an ideal model system to …
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Improving Routing Efficiency, Fairness, Differentiated Servises And Throughput In Optical Networks
… representation. In optical burst switched (OBS) networks, the burst dropping probability increases as the number of hops in the lightpath of the burst increases. Two schemes are proposed and evaluated to alleviate this unfairness. The two schemes have simple logic, and alleviate the …
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Fine root dynamics in the Boreal Forest of northern Saskatchewan, Canada
… tremuloides) (OA), black spruce (Picea mariana) (OBS), and two jack pine (Pinus banksiana) (mature – OJP, young – HJP94) stands were selected and MR were installed in July of 2002. Minirhizotron images were collected monthly from the end of May through September from 2003 to 2006. Total ecosystem …
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Otimização multiobjetivo da geometria de edificações residenciais energeticamente eficientes por meio de algoritmos genéticos
… denominada Otimização baseada em Simulação (OBS). Esta tem como base o uso de algoritmos de otimização acoplados a programas de simulação. As técnicas de OBS têm demonstrado grande potencial para alcançar metas de projetos energeticamente eficientes, entretanto, estas são raramente utilizadas …
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Development of machine learning algorithms for screening of pulmonary disease
… layer: Healthy vs. Unhealthy [AUC=0.90 (0.04)], Obstructive (Obs.) vs. Non-obstructive [AUC=0.95 (0.05)], Obs. AR vs. Obs. Non-AR [AUC=0.72 (0.10)], COPD + AR vs. Asthma + AR [AUC=0.95 (0.15)], COPD vs. Asthma [AUC=1.00 (0.04)], Non-Obs. AR vs. Non-Obs. Non-AR [AUC=0.92 (0.12)]. These results are …
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An assembly and offset assignment scheme for self-similar traffic in optical burst switching
Optical Burst Switching (OBS) is a viable technology for the next generation core network. We propose an FEC-assembly scheme that efficiently assembles self-similar traffic and a Pareto-offset assignment rather than a constant offset assignment. Two buffers, a packet buffer and a burst buffer, are …
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Traffic and performance evaluation for optical networks. An Investigation into Modelling and Characterisation of Traffic Flows and Performance Analysis and Engineering for Optical Network Architectures.
… technique of ¿Optical Burst Switching¿ (OBS). An investigation into the performance impact of various burst assembly strategies on an OBS edge node¿s mean buffer length is conducted. Realistic traffic characteristics are considered based on the analysis of the OC-192 backbone traffic …
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Traffic and performance evaluation for optical networks. An Investigation into Modelling and Characterisation of Traffic Flows and Performance Analysis and Engineering for Optical Network Architectures.
… technique of ¿Optical Burst Switching¿ (OBS). An investigation into the performance impact of various burst assembly strategies on an OBS edge node¿s mean buffer length is conducted. Realistic traffic characteristics are considered based on the analysis of the OC-192 backbone traffic …
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A revised monod-type rate law predicting variable sulfur isotope fractionation factors as a function of microbial sulfate reduction rate
… with a characteristic enrichment factor ( obs) of 0.9976, 0.9962, 0.9938, 0.9924 and 0.9903, respectively. This relationship was used to calibrate a coupled set of isotope-specific Monod rate laws that were modified to incorporate (1) both minimum ( 1 = 0.998) and maximum ( 2 = 0.930) …
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Antenna effects on indoor wireless channels and a deterministic wide-band propagation model for in-building personal communication systems
… multipath delay spread and path loss in indoor obstructed (OBS) wireless channels. A wide-band experiment was performed in a two-floored modern office building at 2.4SGHz in August 1991. Some preliminary results are as follows. Circular polarization cannot reduce delay spread in OBS channels and …
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Investigating blue and fin whale populations through passive acoustic monitoring using ocean bottom seismometers
… large spatial scale. Ocean bottom seismometers (OBSs), geophysical instruments used to study earthquakes through recording ground motion, are opportunistic PAM sensors that record large baleen whale calls. There are large amounts of publicly available OBS data, but these datasets have so far been …
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An Emission and Discard Priority Scheme for Optical Burst Switched Networks
Optical burst switching (OBS) is a promising technology designed to meet the growing demands for internet handwidth and better Quality of Service (QoS). This technology provides all optical and high speed switching to overcome the bottleneck of electronic routers in the core network. In this …
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