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Submitted in partial fulfilment of the requirements for the qualification of Masters Diploma in Technology: Electronics at Technikon Natal, 1990. / This dissertation is primarily concerned with the design in development and performance of a hand-held radio direction finder / M

Thesis (MScIng)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.

Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2006. / Steven Danyluk, Committee Chair ; David Sanborn, Committee Member ; Shreyes Melkote, Committee Member. Includes bibliographical references.

Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2006. / Steven Danyluk, Committee Chair ; Thomas Kurfess, Committee Member ; Peter Hesketh, Committee Member ; Jiri Janata, Committee Member ; Ajeet Rohatgi, Committee Member.

Submitted in compliance with the requirements for the Master's Diploma in Technology: Electronic Engineering, Technikon Natal, 1991. / This dissertation is primarily concerned with investigating and improving the degree of accuracy and precision that may be achieved from temperat~re measurements made utilising nickel-chromium/nickel-aluminium (Type K) thermocouples. The practice of heat treating extruded aluminium section creates specific metallurgical properties within section. Development of specialised aluminium alloys has necessitated the use of treatment temperatures,- close to the limit beyond which the alloy experiences undesirable, permanent, metallurgical change. This situation has demanded urgent attention to, in quality assurance terms, the, 'fitness for purpose', of primary temperature sensors. The most established of these sensors, the Type thermocouple, has known problems relating to calibration stability and drift. The substantial amount of furnace control instrumentation and cabling dedicated to measurement from Type K sensors precludes the simple conversion to an alternate sensor type. The more practical option of applying calibration correction factors to existing measuring systems is only feasible if sensor stability characteristics permit measurement traceability to' be established within required uncertainty limits. / M

This thesis presents a novel fabrication process to realize high-aspect-ratio, micron- and nano-sized probes and pipettes which can be used for biological applications. The basic fabrication process employs hydrofluoric (HF) acid to etch the outer layer of the end of capillary tubings and optical fibers as previously reported by other researchers. However, we invented a " sacrificial boundary etching" technique that can be used to shape capillary tubings and fibers into sharp micron-sized pipettes or probes with controllable tip angle. The tip profile and the length of its taper can be controlled by the initial height of HF acid inside a glass tube, which is used as a sacrificial material in shaping the tip profile. Our experimental results showed that capillary tubings and optical fibers can be sharpen into tips with angle as small as 2.1° and with tip diameter of ranging from 300 nm to 5 mum (the initial diameter being 125 mum). If the aspect-ratio (A.R.) of a probe is defined as the ratio between the length of its taper distance and the length of its base diameter, the A.R. for our fabricated probe can be as high as 10∼15. We also conducted cell probing experiments by using the fabricated probe. In addition, we performed microinjection of fluid into cells. On the other hand, by using the fabricated probe, an automated Carbon Nanotubes (CNTs) microspotting system was developed for rapid and batch assembly of bulk multi-walled carbon nanotubes (MWNTs) based nanosensors. By combining dielectrophoretic (DEP) and microspotting technique, MWNT bundles were successfully and repeatably manipulated between arrays of micro-fabricated electrodes. This feasible batch manufacturable method will dramatically reduce production costs and production time of nano sensing devices. / Lai Wai Chiu King. / "August 2005." / Adviser: Wen J. Li. / Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 4064. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (p. 92-101). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract in English and Chinese. / School code: 1307.

Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: Quenching -- heat transfer -- mineral oil -- surface oxide -- quenchant. Includes bibliographical references (p. 105-109).

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