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 58 for “"Chevron"”.
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IMPACT OF NEW CHEVRON CONFIGURATIONS ON MIXING ENHANCEMENT IN SUBSONIC JETS
… jet noise is through the implementation of chevron nozzles. In the present context, first, a baseline axisymmetric separate-flow nozzle, termed the 3BB model, with an external plug having a bypass ratio of 5 is analyzed. The specifications of this nozzle are taken from an acoustic study …
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An Examination of the Application of the Chevron Doctrine in U.S. District Courts
<p>This paper is an examination of the case Chevron v. Natural Resources Defense Council (1984). Using cases from the U.S. Ninth District Circuit Courts, from the years 2008 and 2009,1 examine how this case is being used today. Both behavioral models and models made explicitly to study the use of …
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Oil, Power, and Discourse: How Chevron Evaded its Dues to the Indigenous Communities of the Ecuadorian Amazon
… power of big corporations. I researched why Chevron refused to acknowledge its legal obligation to remedy the complex problems it has caused in the Ecuadorian Rainforest. The catastrophes the indigenous communities have been facing are about to change as a result of grass root mobilization …
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Response of alfalfa to foliar applications of long-chain fatty acids or seed treatments with Chevron XE-1019
Forage crops grown in many parts of the Appalachian region are restricted in yields as a consequence of shallow soils, low levels of essential nutrients, toxic levels of aluminum, and low pH. Therefore, the successful growth of alfalfa in these regions is dependent on either changing existing …
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Electronic characterization of solution-synthesized graphene nanoribbons using scanning tunneling microscopy
… The electronic characterizations of the chevron GNR and new chevron/7A heterojunction GNR with functionalized side chains are also presented using scanning tunneling spectroscopy in a room temperature scanning tunneling microscope. The initial findings of the chevron/7A GNR with …
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Corporate Social Responsibility and its Effects on Corporate-Community Relationships: A Case Study of Chevron's Richmond Refinery Fire in 2012
… significant, and valuable business strategy that Chevron developed and implemented within its corporation, why was it not used effectively during the Richmond Refinery fire in 2012? For this project a case analysis of the Richmond Refinery is performed, which evaluates steps taken by Chevron …
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Die Osteotomie nach Austin - klinische und radiologische Ergebnisse nach Operation
… Patienten, die mit der Osteotomie nach Austin (Chevron-Osteotomie) zur Korrektur der Hallux-valgus-Deformität operiert wurden. Die Ergebnisse wurden anhand einer retrospektiven Studie mit einem minimalen Nachuntersuchungszeitraum von 2 Jahren analysiert.
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Manufacturing of lab-on-a-chip devices : characterizing seals for on-board reagent delivery
… Four seal patterns - line hemisphere, line flat, chevron hemisphere and chevron flat were created and tested for reagent delivery using a flow sensor and a force gauge. Preliminary experiments suggested that one of the patterns - "line-flat" - resulted in fewer flow anomalies. A parameter scoping …
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Study of High-speed Subsonic Jets using Proper Orthogonal Decomposition
… axisymmetric conical nozzle and ones with chevrons. The analysis is done using flow velocity data obtained through Particle Image Velocimetry (PIV). Two chevron nozzles with penetration levels at 2% and 4% are used. The mean velocity and TKE results show that chevrons reduce the potential …
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Scanning tunneling microscopy investigation of atomically precise graphene nanoribbons
… imaging and reveal a 2.76 eV bandgap for chevron graphene nanoribbons. It was also discovered that tunneling to the substrate influenced STS measurements. STM and STS studies of two additional GNR geometries, the extended chevron GNR (eGNR) and the hybrid GNR (hGNR) elucidate how …
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A Variable Stiffness Energy Dissipation Device for Vibration Control of Steel Frames
… device is placed between the top of an inverted Chevron bracing and the beam above, it is activated when the apex of the Chevron brace moves relative to the connecting beam. Due to the complexity of constructing a structural model for a series of helical springs arranged in the afore-mentioned …
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Process for optimizing location of dampers in a building
… of dampers: the diagonal system, the Chevron system, the toggle system and the scissor-jack toggle system. For each configuration the elongation of the damper is calculated without any approximations and the results are used in order to optimize the design of the configuration if it …
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Assessment of seismic design provisions for multi-tiered ordinary concentrically braced frames
… total frame height, brace configurations (X, chevron, and split-X), and tier heights, are designed as per both provisions. Their seismic performance is assessed by employing nonlinear static and time history analyses on a three-dimensional, numerical model developed using the OpenSees …
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Bestimmung der bruch- und schädigungsmechanischen Eigenschaften keramischer Filterwerkstoffe aus Kleinstproben
… mit einem Vier-Punkt-Biegeversuchsaufbaus mit Chevron-gekerbten Proben (CNB-Versuch). Numerische Untersuchungen dienten zur Bestätigung der Versuchsergebnisse und Bestimmung der Form der Rissfront sowie Risswachstum während des Versuches.
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Inelastic behavior and seismic collapse prevention performance of low-ductility steel braced frames
… through full-scale tests of an R = 3 CBF in the chevron configuration and an OCBF (R = 3.25) in the split-x configuration. Test results and numerical simulations indicate that the chevron configuration is more suitable for providing reserve capacity, and that while some of the minor seismic …
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Acompañamiento para el desarrollo de un prototipo de producto de aceite lubricante para motores Diesel SAE15W40
… con otros productos del mercado de las compañías Chevron y Mobil, de los parámetros físicos gravedad específica y viscosidad cinemática a 40 °C y 100 °C.
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Analysis of seismic reflection data over the Sanford Triassic Basin, Chatham and Lee Counties, North Carolina
… Basin in North Carolina were acquired by Chevron, Inc. in 1972. These data enabled a comparison of the relative effectiveness of dynamite and vibroseis sources to be made. A comparison of 3-fold and 12-fold dynamite data, as well as 24-fold vibroseis data with a relatively limited …
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Fracture mechanics and its application in rock excavation
The two chevron notched specimen geometries for rock Mode I fracture toughness measurement, CB and SR, recommended by the ISRM have several disadvantages, such as very low loads required to initiate failure, complicated loading fixtures, difficult to be developed for rock mixed mode fracture …
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MEMS enabled Fabry-Perot cavity for cQED experiments
… Master thesis the fabrication of 1-D v-shape or chevron thermal actuator is proposed based on the following characteristics: the actuator exploits the thermal expansion property of silicon to generate mechanical actuation, offers linear in-plane displacement, large force in small area compared to …
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A system-theoretic approach to oil and gas assurance programs
Chevron, one of the world's leading integrated energy companies, faces new challenges as it aggressively pursues digital innovation and acceleration. Oil and gas well construction, in particular, will continue to incorporate automation to enhance capabilities and gain a competitive advantage. These …
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