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 29 for “"residual gas"”.
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Residual Gas Analysis of Ceramic Dip Pack Semiconductor Devices
No abstract prepared.
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The effect of spark timing on residual gas fraction
Residual gas tests were done on a 2.4 liter commercial engine to find a correlation for the effect on spark timing on residual gas fraction. The tests were done by sampling the charge mass during a non-firing cycle through a small hole into cylinder 4. The residual gas fraction was determined by …
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Development of continuous processing method for pouches in rotary retorts
… to evaluate the effect of product viscosity and residual gas volume in the pouch on the processing time. In order to accomplish these objectives, processed green beans in three packaging options, the developed rotating pouch, a No. 10 can, and an institutional size pouch, were compared in …
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Natural Gas Generation Potential of the Wufeng-Longmaxi and Niutitang Shale Formations, Sichuan Basin, China: Insight from Hydrous and Anhydrous Pyrolysis
A comparative study was conducted on the residual shale gas generation potential of the Silurian Wufeng-Longmaxi and Cambrian Niutitang formations of the Sichuan Basin, China. Previous studies focused on geological variables affecting gas adsorption and retention in the Silurian and Cambrian shale …
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Characterization of nano-scaled metal-hydrides confined in nano-porous carbon frameworks
… and lower volume than liquid H₂ or compressed gas. Thermodynamic properties of metal hydrides differ between bulk and nano-sized particles. Many metal hydrides with useful volumetric and gravimetric capacities have high decomposition temperatures, but when placed in nano-sized frameworks (or …
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Uncertainty analysis of capacity estimates and leakage potential for geologic storage of carbon dioxide in saline aquifers
… the endpoint relative permeability of CO₂, residual gas saturation, viscosity of water, and viscosity of the brine. The results of the simulations for capacity indicate that there is a large uncertainty in capacity estimates, and that evaluating the model at using the mean values of the …
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The design, construction, and operation of a centrifugal molecular still
… the mean free path of the vapor molecules in the residual gas, the process is known as molecular distillation. [Continued in document]
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Managing transient behaviors of a dual mode spark ignition-- controlled auto ignition engine with a variable valve timing system
Gasoline Homogeneous Charge Compression Ignition (HCCI) engine has the potential of providing better fuel economy and emissions characteristics than current spark ignition engines. One implementation of this technology employs a Variable Valve Timing (VVT) system and is also often referred to as …
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The electrical properties of pure manganese and manganese/magnesium fluoride cermet thin film resistors
… parameters, viz substrate temperature, residual gas pressure, annealing and aging are investigated. The structure of the films was investigated using X-ray diffraction and transmission electron microscopy. Films with negative TCR have low activation energies (~ 1 to 100 meV) in the …
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Competition between Reaction Channels in Electron Collisions of the Hydrogen Molecular Ion HD+
… device, or with molecules from the dilute residual gas in the TSR vacuum system.
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Penning ionization studies using a crossed-beam technique
… beam particles from those due to ionization of residual gas. Preliminary analysis of the appropriate operating conditions for the pulse counting system is presented. To determine the types and abundances of ions produced in He*-neutral collisions, a magnetic sector mass spectrometer has been …
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Electron collisions and internal excitation in stored molecular ion beams
… the effects of collisions with electrons and residual gas species. The low-energy DR of HD+ is rich with resonances from the indirect DR process, when certain initial rotational levels in the molecular ion are coupled to levels in neutral Rydberg states lying below the ion state. Using new …
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Studying Interactions of Gas Molecules with Nanomaterials Loaded in a Microwave Resonant Cavity
… and other nanomaterials for different types of gas molecules. The range of the frequency signal as a probe was chosen as geometry dependent range between 9.1 -9.8 GHz. A highly specific range can be studied for further experiments dependent on the type of molecule being investigated. It was …
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High current ion emission in electrohydrodynamic spraying
… on the emission of secondary electrons and residual gas in the vacuum chamber. Some results for spraying from a negative polarity emitter and also for spraying of sodium iodide-glycerol are also reported. The experiments confirm the large effective size of the emitting area predicted by the …
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Ionic Liquids Tethered to Activated Carbon for Capture of Airborne Toxins
… found to be good absorbents for a variety of gaseous species. The absorption selectivity and capacity can be tuned by changing the anion-cation pair. By tethering ILs to AC, the beneficial properties of gas absorption from ILs can be integrated into a solid system. The simulant …
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Non-metallic cold-cathode electron emission from composite metal-insulator microstructures
… experimental conditions, e.g. pulsed-fields, gas environment etc. This study has shown that, for applied fields of 20MVm^-1, thin dielectric (750AA) and composite metal-insulator (MI) overlayers result in a dramatic increase in the total number of emission sites (typically 30cm^-2), and hence …
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High load limits of the controlled autoignition engine
… heavily diluted with either excess air or burned gas. One problem that limits the engine's introduction into the market is that the rate of combustion can be fast to the point that it is very loud and is destructive to the mechanical components of the engine. The nature of this problem is akin to …
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The design and construction of a five inch centrifugal molecular still
… the mean free path of the vapor molecules in the residual gas. Under these conditions, distillations can be made at temperatures 100 to 150°C. lower than ordinary distillations. Many of the so-called "undistillables“ can be distilled under conditions existing in the molecular distillation process. …
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Chemical vapor deposition of thin films for ULSI interconnect metallization
… (reducing agent), and 80 Torr H2 (carrier gas). The film resistivity approaches the bulk value of copper for film thickness greater than 100 nm. Reaction order experiments show first-order kinetics with respect to Cu(hfac)2 partial pressure and zero-order with respect to isopropanol. A …
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