In this work we apply quasirandom sequences to develop a derivative-free algorithm for approximating the global maximum of a given function. This work is based on previous results which used a single type of quasirandom sequence in a Brute Force approach and in an approach called Localization of Search. In this work we present several methods for computing quasirandom sequences as well as measures for determining their properties. We discuss the shortcomings of the Brute Force and Localization of Search methods and then present modifications which address these issues which culminate in a new algorithm which we call Modified Localization of Search. Our algorithm is applied to a test suite of problems and the results are discussed. Finally we present some comments on code development for our algorithm. / A Thesis submitted to the Department of Scientific Computing in partial fulfillment of the requirements for the degree of Master of Science. / Degree Awarded: Summer Semester, 2011. / Date of Defense: April 25, 2011. / Search, Sequences, Numerical, Quasirandom, Optimization / Includes bibliographical references. / Janet Peterson, Professor Directing Thesis; Max Gunzburger, Committee Member; Gordon Erlebacher, Committee Member; John Burkardt, Committee Member.

Includes bibliographical references

Coastal clay deposits are an increasingly important focus of environmental and geotechnical studies, and to date, geophysical techniques for mapping them have almost exclusively relied on bulk conductivity measurements. However, direct correlation of bulk conductivity data is difficult, as it is a non-unique parameter. A potential alternative geophysical mapping tool is the complex conductivity technique, where both in-phase and out-of-phase conductivity are measured concurrently. Using similar principles, the induced polarisation field technique measures the charge polarisation parameter chargeability. Studies that utilise these techniques have almost exclusively concentrated on the charge polarisation properties of sediments with low clay contents, and these sediments have intuitively credible positive chargeability values. However, the few studies that include high-clay-content sediments ??? like those encountered in coastal clay deposits ??? have often reported negative chargeabilities. No mechanism has been presented that accounts for this effect. Similar negative chargeability effects have been noted in other sciences, but often remain unexplained. Negative chargeability is shown here to be a non-linear property of clay gels ??? unique to sediments with bulk membrane properties and a potential new clay mapping parameter. A new clay polarisation model is presented which accounts for negative chargeability. Clay sediments are considered as a clay gel membrane, as opposed to traditional models ??? of clay zones within a solid substrate. In the revised model, non-linear ionic gradients occur within the sample, due to the bulk membrane properties of clay gels. Charge dispersion is described in terms of anomalous diffusion Warburg impedances, which create currents in the opposite sense to the applied potential. Negative chargeability is then a unique feature of sediments with bulk membrane properties. Laboratory electrical impedance spectroscopy (EIS) data are presented. The experimental data covers a variety of clay types at a variety of water contents. For pure clay samples, negative chargeability is shown to occur when the clay???s water content is such that it is in a gel state. The threshold water content is shown to be a function of the clay???s liquid limit. This trend is more complicated for natural clays. Field measurements of negative chargeability are presented. The Conductivity Cone Penetrometer (CCPT) is utilised as a chargeability-logging tool at a field site at Hexham, New South Wales. In the first study of its kind, negative chargeability CCPT logging is shown to be effective in mapping a coastal clay deposit.

"February 2004" / References: leaves 150-160. / viii, 160 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, School of Chemistry and Physics, Discipline of Chemistry, 2004

Thesis (M. Div.)--Baptist Bible Graduate School of Theology, 2005. / Abstract. Includes bibliographical references (leaves 120-137).

<p><strong>Abstract</strong></p><p> </p><p>Camera phones are moving into the rapid growth stage and they will rapidly be the most common image capture device in the world. Analysis agencies Gartner, ABI-Research and Future Image estimate that over 650 million camera phones were shipped in 2007 and that by the end of the decade there will be a global population of over one billion mobile imaging handsets -- more than double the number of digital still cameras (DSC).</p><p> </p><p>Although handset shipments are flourishing, consumers are not using their camera phones to the fullest extent. Researchers reveal that the number of photos taken, shared, and printed is relatively very low compared with DSC, resulting in a significant unrealised revenue potential for the mobile imaging industry.</p><p> </p><p>Despite the current limitations, recent researches done by Nokia marketing reveal that 40% of camera phone users indicate the camera phone is their primary camera. The researches suggest that with improvements in functionality, quality, usability and usage model, camera phones have the potential to be the most common and most frequently used type of camera.</p><p> </p><p>We believe the industry needs to stimulate more photo activity among camera phone owners to speed up (1) handset purchases, (2) picture taking, and (3) sharing, storing and printing services.</p><p> </p><p>To achieve this we believe companies with niche imaging technologies; such as faster decoding, less memory usage, minor processor (CPU) demands, rich features, and rich user experience have slightly high chance to outstand itself in this market. Also companies within the mobile imaging sphere which should have a competitive edge are the one who can solve inhibitors.</p><p> </p><p>Five out of every six sold cameras will be embedded in mobile phones. We believe the dominance of camera-phones will impact the imaging market in a variety of ways that will benefit the industry.</p><p> </p><p>This report aims to initiate a simple approach to give a high level view for companies aiming and searching for mobile imaging opportunities and should help extending the mobile focus thinking and area.</p><p> </p><p>Initiating a study on mobile imaging has been a challenge and this is due to two main reasons; the speed of development within this particular industry and the access to credible sources whether commercial or scientific. There is a significant fierce competition in the industry and it has been a great advantage to the authors to have had access to commercial reports and information sources first hand.</p><p> </p><p>When it comes to theories and methods, they have been taped from both the mainstream marketing literature and guerrilla marketing. There has been no obvious advantage to exclude mainstream marketing theories for this fast growing and quickly changing industry and methods described has proven worth while for the outcome of this study.</p><p>The mainstream marketing literature has been utilised in the market analysis performed on the materiel obtained and when looking to the future possibilities and opportunities as well.</p><p>The MIO model or the MIO-perspective, has been an excellent tool to help digest the information in a structural way and the three perspectives that are the foundation of the model; Market, Interaction and Organisation are all needed in any successful Marketing activity whether it is a fast moving business like the mobile image one or a more traditional industry e.g. the car industry. The model identifies the present situation, the future, strategy and action plan, all important components in forming the business plan.</p><p>When describing both the present environment and when searching for new opportunities, the usage of the classic 4P’s is outstanding. Product, Price, Promotion and Place are all important parameters to elaborate on and as the MIO model points out, one should first focus on the industry as a whole and not once own enterprise in order to find profitable ways to develop the business.</p><p> </p><p>Some conclusions drawn from the study are; the more megapixels camera phone are released the more the customers’ awareness and education is raised and refined. This leads to better customers inconvenience to get the best out of their phones and the myth of getting a free digital camera does not live any more. The customers are getting better informed and they want their right to one converged high quality device where the camera is as important as the call functions of a phone device.</p><p><strong></strong></p>

No description available.

The apparent dissociation constants of carbonic acid were determined as functions of temperature and salinity in seawater at atmospheric pressure. There is fair agreement between my values of K'₁ and those of Buch et al. (1932), Lyman (1956), and Hansson (1971). My values, on the average, are 6.7% lower than Buch et al.'s (1932), 4.6% smaller than Lyman's (1956), and 4.0% higher than Hansson's (1972). My values for K'₂ are smaller than those reported by other workers. They differ by 3.4% from Hansson's (1972) values, and 26% from Buch's (1938). Lyman's (1956) values are larger than mine by 3.2% at temperatures of 25°C and below, and greater by 13.4% at 35°C. / Graduation date: 1973

Graduation date: 1973

Graduation date: 1974