Thesis. / Includes bibliography.

Inaug.-Diss.--Münster i.W. / Lebenslauf. "Verzeichnis der benutzten literatur nebst anbage der gebrauchten abkürzungen": p. [7]-8.

Thesis (M.S.)--Ohio University, March, 2006. / Title from PDF t.p. Includes bibliographical references (p. 67-75)

Thesis (M.E.T.)--University of Canterbury, 2006. / Typescript (photocopy). Includes bibliographical references. Also available via the World Wide Web.

The electronic specific heat of Cadmium has been determined by a number of independent workers; using two basic methods; magnetic and calorimetric. This thesis pursues, the problem by a calorimetric determination using an aquadag thermometer and a thermal valve. Production of low temperatures is necessary as the transition temperature for this superconductor is about 0.56° K. Hence, the interest lies in attempting to determine the heat capacity of the metal both in the normal and superconducting states. The experimental method and results for specific heat measurements for other superconductors is briefly reviewed. The design of the cryostat is discussed in detail in Chapter II. A rather unique method of preparing a paramagnetic salt pill is also given. Resistance thermometers and determination of temperature very important and the temperature range is obtained by adiabatic demagnetisation. The conclusion and results of this research project is given in Chapter III. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

<p> In past years, wireless technology has seen an incredible boom. As a result, industry has gone to great lengths to make wireless devices cheaper, smaller, faster and less power- hungry. This has prompted a significant interest in the research world to design circuit components that would facilititate these goals. However, much of the focus has been on wireless technology for communications applications, such as wireless telephony and wireless computer networking. More recently, there has been a focus on developing circuits for other wireless applications, one of which is wireless sensor networks. Such applications would demand extremely low-power operation, especially from the RF front-end. We have concentrated on achieving low-power operation for one of the important building blocks of the RF transceiver, which is the frequency downconversion mixer. </p> <p> In this thesis, we describe the design and results of two mixers, both designed in CMOS O.l8J.Lm technology offered by the Canadian Microelectronics Corporation (CMC). The first design uses the body terminal of the transistor as one of the inputs. This method allows for the radio-frequency (RF) and local oscillator (LO) stages in traditional switching mixers to be collapsed into one stage, thereby allowing for operation at lower supply voltages and lower power comsumption levels. This mixer was designed to downconvert a 1.9GHz RF signal to a 250MHz intermediate-frequency (IF) signal. The measured performance characteristics resulted in a power consumption of 400J.LW from a 0.8V supply, a conversion gain of 1dB, a single sideband (SSB) noise figure of 1ldB, and an input-referred 3rd-order intercept point (IIP3) of -9dBm. </p> <p> The second mixer design used a folding architecture to reduce the supply voltage headroom needed, as well as distribute the current appropriately for high-gain and lowpower operation. This mixer was designed to downconvert a 2.4GHz RF signal to a 100MHz IF signal. The simulated performance characteristics showed a power consumption of 640).1 W from a 1 V supply, a conversion gain of 4dB, a SSB noise figure of 19dB, and an IIP3 of -6.5dBm. </p> / Thesis / Master of Applied Science (MASc)

Musculoskeletal physiotherapy is the most common intervention for chronic low back disorder. Any observation on clinical practice or investigation into the clinical and scientific literature indicates that musculoskeletal physiotherapy encompasses a plethora of treatment modalities and approaches. The aim of the present investigation was to determine the most common intervention(s) that comprise musculoskeletal physiotherapy and to critically explore their empirical therapeutic basis. Two components were highlighted as the most frequently employed interventions; namely manually applied therapy (manual therapy) and exercise(s) to rehabilitate the lumbar spine's stabilising system. In the course of an extensive literature search, work was uncovered that suggested that the mechanisms required for spinal stability could be better facilitated using methods other than those in current clinical use. These discoveries culminated in the creation of a ten-week rehabilitation programme which was primarily developed to facilitate rehabilitation of spinal stabilisation but also permitted an empirical analysis of this component of musculoskeletal physiotherapy. The efficacy of the regime was then assessed in comparison to manual therapy and to a control (an education booklet) in a randomised controlled trial. Following a series of pilot studies, 300 patients with chronic low back disorder were randomly assigned to groups and completed their respective management programmes. Data were collected on pain, disability, handicap, impairment and quality of life prior to entry and at three, six, twelve and twenty-four months post intervention. The results indicated a consistent trend for greater improvement in the spinal stabilisation group in the pain, handicap, impairment, disability, dysfunction and medication variables. These trends reached statistical significance at the three-month follow-up stage as evidenced by quality of life (P = 0.025), at the six-month follow-up stage in pain (P = 0.009) and dysfunction (P = 0.042) and at the one-year follow-up stage in medication (P = 0.007), dysfunction (P = 0.048), disability (P = 0.0098) and quality of life (P = 0.003). It was therefore concluded that the spinal stabilisation programme was a more effective component of musculoskeletal physiotherapy (when analysed in isolation) than manually applied therapy or an education booklet in the management of chronic low back disorder. Various sub-analyses of the data were conducted. Subjects who entered the study with high levels of low back pain (greater than 50 numerical rating scale) demonstrated a statistically Significant reduction in pain levels (P = 0.04) in both the manual therapy group and the spinal stabilisation group in comparison to the education control group at the three-month follow-up stage. These data provide empirical evidence towards the efficacy of these two musculoskeletal physiotherapy management regimes as being effective in pain reduction in comparison to an active control intervention. This has not hitherto been demonstrated on patients with chronic low back disorder.

International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / In this paper, a small-sized low-noise integrated block downconverter (LNB) used for Ku-band direct reception from broadcasting satellites (DBS) is proposed. The operating frequency of the LNB is from 11.7 to 12.2GHz. The outlook dimension is 41 X 41 X 110mm^3. Measured results show that the average gain of the LNB is 57dB, and noise figures are less than 1.7dB. It has been found that clear TV pictures have been received using the LNB for the experiment of receiving the "BS-2b" (Japanese broadcasting satellite) at Harbin region, Heilongjiang Province, P. R. China.

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