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.
Results
Showing 1 to 6 of 6 for “"vacuum technology"”.
-
YBa2Cu3O7-x thin films prepared by Chemical Solution Deposition
… (CSD) procedure was selected, given that no vacuum technology is required. To reveal the flexibility and the good optimization possibilities of the CSD approach two main processes were chosen for comparison: a fluorine-free method, namely the polymer-metal precursor technique, and a …
-
Process development for high powered amplifier Au/Sn eutectic die attach via vacuum furnace
… research was conducted to develop and qualify a vacuum GaAs semiconductor monolithic microwave integrated circuit die attach process. Research was done to understand the causes and effects of voiding levels on device performance and reliability. Simultaneous investigation was done to qualify …
-
DESIGN, DEVELOPMENT AND VALIDATION OF NOVEL ELECTRICAL CONTACTING SYSTEMS, MECHANICAL ENCAPSULATION SOLUTIONS AND HIGH-RESOLUTION INTEGRATED CHARGE-SENSITIVE PREAMPLIFIERS FOR ADVANCED HIGH-PURITY GERMANIUM DETECTORS
… with the front-end electronics. In parallel, a vacuum tight capsule was designed and fabricated to house the HPGe crystal. Leak testing of the capsule demonstrated excellent vacuum retention, with a pressure increase of only 2 × 10−5 mbar over five days. In addition, novel integrated charge …
-
Finite Element Procedures in Modelling the Dynamic Properties of Rubber
Rubber is not only a non-linear elastic material, it is also dependent on strain rate, temperature and strain amplitude. The non-linear elastic property and the strain amplitude dependence give a non-linear dynamic behavior that is covered by the models suggested in this thesis. The focus is on a …
-
Estimation of the In-Cylinder Air/Fuel Ratio of an Internal Combustion Engine by the Use of Pressure Sensors
This thesis investigates the use of cylinder pressure measurements for estimation of the in-cylinder air/fuel ratio in a spark ignited internal combustion engine. An estimation model which uses the net heat release profile for estimating the cylinder air/fuel ratio of a spark ignition engine is …
-
Structure-acoustic analysis; finite element modelling and reduction methods
This thesis investigates structure-acoustic systems by use of finite element analysis. The systems studied here are limited to those that consist of an enclosed acoustic fluid cavity, which is coupled to a flexible structure and/or a porous sound absorbing material domain. This type of analysis is …