This project explores a novel technique for the vibration control of slender beam-like flexible structures. For this purpose, a new method is developed based on minor structural modifications. Three applications are chosen to demonstrate the new method. The first is the sensing wire oscillations of a hot-wire probe. The second application is the problem of tool chatter due to milling tool vibration, while the third application is the bending of an arrow as it is released from a bow. Although these applications sound quite different, they are in fact similar problems dynamically. They are related to the forced transverse structural vibrations of slender beams. For all applications, the external force input is of a broadband nature in frequency, similar to a white noise excitation. This force excites the slender beams into large amplitude resonance which in the case of a hot-wire probe, causes measurement inaccuracies, for milling, causes rough surface finish and slower machining times, whereas for archery causes reduced accuracy. The choice of the particular problems to demonstrate the effectiveness of the technique is due to the current research interests and available expertise in this area in the School of the Built Environment at Victoria University. However, the methods developed through the course of this research are general methods applicable to all other slender beam-like structures with step changes in cross sectional geometry, such as flexible robotic arms or power transmission cables.

Regional ports adjacent to capital city ports have often developed as bulk ports (Hilling and Hoyle 1984), but for most there is a recognition that they may be no longer able to rely solely on the benefits of exploiting bulk commodities and trades to sustain competitive advantage and growth. To attain growth and survival there is the perception and often the reality that they need to diversify their trade base or/and enter new markets - most of which are likely to be dominated by their capital city ports. But challenging the market dominance of established capital city ports is likely to be very difficult, especially given the rationalisation of shipping networks and the restructuring of supply chains at few suitable ports - most of which in Australia are likely to be capital city ports. How will regional ports which are in the shadow of capital city ports and constantly face significant economic and competitive penalty manage to compete for growth and survival? How will regional ports manage to grow if the nature and scale of trades in their markets are severely restricted as commercial activities, mainly high-value container trades, are concentrated in the larger established capital city ports - even when there is a recognition that some container trades could be handled economically and cost-effectively in regional ports? Simple observation of the economic health of many regional ports, often ill-devised and/or poorly implemented strategies set in place by regional port managers, and of unclear and less-than-adequate conceptual frameworks for the mechanisms of port growth as set out in the literature all suggest that there is 'strategy decay' (Hamel 2002) and the need for a clear understanding of port growth, and particularly of the dynamics and mechanisms of port growth for regional ports in the shadow of their capital city ports. This study seeks to define the basis of and the mechanisms for regional port growth. The study identifies opportunity capture as the basis for defining effective growth strategies for a regional port; and argues that competition for opportunity share rather than competition for market share is the key for regional port growth. The study offers a theoretical framework which regional port managers can use to effectively capture and increase the share of valuable opportunities in the quest for growth; and empirically investigates the perceptions of regional port managers about effective growth strategies for regional ports. A detailed review of the relevant literature revealed a considerable range of factors and conditions underlying port growth; but to our knowledge, there has been no analytical testing of the proposition that opportunity capture is the appropriate mechanism for regional port growth nor has there been any rigorous attempt to define growth strategies for regional ports that are in the shadow of capital city ports. It was, therefore, necessary to collect data from port specialists in order to gain useful insights into regional port growth strategies and opportunity capture. The qualitative data collected were categorized in relevant dimensions - using content analysis - and then used to develop a more structured and formal Internet-based survey which sought to collect data from a much broader sample of regional port managers with the objective of testing their perceptions about effective regional port growth strategies; and to model opportunity choice - a critical process of opportunity capture. The determinants of opportunity choice were identified with discrete choice modelling which called for a stated choice experiment in order to investigate how regional port managers actually make opportunity selection decisions. Discrete choice modelling as used in this study to model executive judgment at strategic level is novel and constitutes an important departure from more traditional approaches. A major conclusion of the study is that regional ports that have developed in the shadow of their capital city ports have the opportunity for growth if they can capture valuable opportunities over time; and that critical to opportunity capture is entrepreneurship and market-driven strategies that regional port managers can implement and orient to provide shippers and other regional port customers with superior access to markets in which they compete for competitive advantage and market dominance. Superior access to markets is provided through supply chains that are value driven; that is, supply chains that are integrated and focus on the end-to-end, cost-effective movement of freight. Such supply chains seek to deliver competitive advantage or value to shippers and to capture value for the port.

Changing climate, increasing demand for potable water supplies and increased community interest for sustainable use of fresh water sources have resulted in a new focus on water use and sourcing. New sources are being sought, in conjunction with water demand minimisation strategies, to decrease the pressure on existing urban water resources. At the same time, the management of stormwater is being re-examined with the focus changing from the traditional practice of rapid disposal of stormwater (to reduce the risks of flooding) to utilisation of stormwater as an alternative water supply source. The focus of this thesis is the use of stormwater as an alternative supply source in urban areas at a cluster (or neighbourhood) scale. A decision making framework was developed to assist the adoption of a holistic approach to determining the most appropriate stormwater use scheme option. It was developed as an integrated planning tool to be used in the initial stages of investigating water sourcing and stormwater management ideas. Due to the time constraints of this project, the focus of the decision making framework was on the technical components (with associated issues) and financial costs. Since additional issues such as environmental, social and economic issues, are crucial to ensure a balanced view is taken in the decision making process, they are included in the process through additional information sources. Development of the decision making framework considered the following steps: • Development of stormwater use scheme options based on the technical components and associated issues of collection, storage, treatment, distribution and end use; • Development of screening tools to screen out infeasible or clearly inferior stormwater use scheme options; • Development of steps in the decision making framework; and • Demonstration of the decision making framework through the use of a case study. The decision making framework consists of eleven steps. The initial six steps of the decision making framework relates to collection and end use issues and are based around matching stormwater runoff to demand and matching stormwater quality to required quality. Steps 7 to 9 of the decision making framework consist of examining and determining feasible storage, treatment and distribution options. Step 10 of the decision making framework focuses on the integration of the feasible technical options identified in the previous steps, in order to develop stormwater use scheme options. The final step of the decision making framework is to determine costs of the stormwater use scheme options and compare the scheme options on the basis of cost, reliability of supply, quantity of stormwater utilised and end use demands met. The decision making framework was demonstrated as an easy and practical tool for determining the most appropriate stormwater use scheme through the use of a case study. An existing urban area was chosen as the case study due to the potential for the greater impact in terms of minimising potable water use for non-potable end uses. Feasible collection, storage, distribution, treatment and end use options were determined and integrated into 19 stormwater use schemes. Comparison of all the stormwater use scheme options, as well as the base case with no stormwater use, determined four options as being superior in terms of financial costs, reliability, quantity of stormwater used and end uses met. The decision making framework was developed based on existing constraints (such as the lack of guidelines directly examining stormwater use) and knowledge, while being flexible enough to include future scientific and practical knowledge, as it becomes available. Recommendations for future development of the decision making framework include expanding this decision making framework to identify the optimum scales of stormwater use schemes. Additionally, an effective yet simple to use costing tool needs to be developed so that all environmental, social and economic costs are determined and actual benefits of stormwater use schemes can be determined.

Sloshing is the low frequency oscillations of the free surface of a liquid in a partially filled container. The dynamic response of structures holding the liquid can be significantly influenced by these oscillations, and their interaction with the sloshing liquid could lead to instabilities. It is critical to predict and to control sloshing in order to maintain safe operations in many engineering applications, such as in-ground storage and marine transport of liquid cargo, aerospace vehicles and earthquake-safe structures. Contributions to the state of knowledge in predicting and controlling sloshing are the main objectives of the proposed research. To this end, a numerical model has been developed to enable reliable predictions of liquid sloshing. The numerical results are compared with experimental results to determine the accuracy of the numerical model. Further, the research addresses the employment of intentionally induced sloshing to control structural oscillations. The novelty of this research is in its use of a flexible container. Results indicate that intentionally introduced flexibility of the container is capable of producing effective control. The practical application of the proposed research is in the early design stages of engineering systems for which liquid sloshing plays a significant part in structural loading.

A Very Early–warning Smoke Detection Apparatus (VESDATM) detects the earliest traces of smoke by continuously sampling the air from a designated area. Air sampling is achieved by use of a system of long pipes containing numerous small inlet orifices termed as sampling holes. The air samples are drawn to the detector by means of an aspirator. In spite of the high sensitivity of the detector, much of this advantage can be lost if the smoke transport time within the pipe network is excessive. Consequently there has been a legislation introduced by Standards such as AS 1670 and BS 5839 stating the maximum transport time to be within 60 seconds of entering that extremity of a pipe system of 200 meters aggregate length, and the suction pressure was to be no less than 25 Pascals. Once the pipe network is installed, it is impractical and often impossible to test the transport time and suction pressure drop of every sampling hole in a complex network of pipes. Therefore, a software modelling tool is required to accurately predict these parameters to 90% of measured value with high accuracy. The flow regimes within the sampling pipes proved complex, involving frequent transitions between laminar and turbulent flows due to disturbances caused to the main flow by jet flows from the sampling holes. Consequently, the published equations to determine friction factors does not predict pressure loss and transport time results to an acceptable accuracy for this thesis. Computational Fluid Dynamics simulations were carried out at various magnitudes of disturbances similar to the effects in VESDA pipe network. The data from the CFD were analysed and the results were used as a guide to develop mathematical models to calculate the friction factor in flow regimes where jet disturbances are present. The local loss coefficients of fittings such as bends and couplings were experimentally determined for all types of fittings used in VESDA pipe networks. The local loss coefficients that were determined made significant improvements in calculating pressure losses compared to the results obtained when commonly used loss coefficient values were used. The characteristics of the VESDA aspirators of all models were determined. The experiments were carefully set up to ensure the apparatus did not have any influence on the aspirator performance. Mathematical models were developed for each VESDA model. A relationship between the magnitude of disturbance and the delay it caused for the smoke to travel from one segment to the next was established. From this relationship, a new transport time mathematical model was developed. Validations of all mathematical models were carried out in different pipe configurations. In all cases the results calculated were within 90% or better compared to the measured results.

In this research, multi-layer packaging films comprising an inner coating layer containing natural antimicrobial (AM) agents were developed. Volatile essential oils obtained from plant extracts including carvacrol, linalool and methylchavicol were used as the active AM agents in the coating layer. The amount of natural AM agents and the composition of the coating system required to provide the optimum AM effect in food media and on Cheddar cheese was explored. The stability of the AM coatings in various food simulants was also explored. In the film preparation, the AM coatings were embedded between low-density polyethylene (LDPE) layers to construct multilayer AM films. Investigation of the retention and subsequent release of the AM agent from multi-layer films suggested that a coating layer consisting of ethylacrylatemethylmethacrylate performs satisfactorily as the carrier for the AM agent. Furthermore, LDPE is able to successfully control the release of the AM agent into food simulants. The controlling layer thickness, AM layer thickness and the solubility of AM agent are critical factors affecting the overall effectiveness of the multi-layer AM film. At subambient temperatures, the multi-layer AM films successfully inhibited the growth of E. coli in liquid food media and on Cheddar cheese.

Thesis (Ed. D.)--Teachers College, Columbia University. / Typescript; issued also on microfilm. Sponsor: Thomas A. Leemon. Dissertation Committee: Barbara Spencer. Bibliography: leaves 129-131.

The reconciliation of experimental and computational data is an on-going challenge in many fields of scientific enquiry. This is particularly true in chemistry, especially with respect to biologically interesting molecules, given the myriad of problems that now lend themselves to theoretical investigation. This work sampled several areas of this greater landscape using various computational methods, and compared these results to relevant, experimentally derived data.

Thesis (M.S. in Information Technology Management)--Naval Postgraduate School, March 2005. / Thesis Advisor(s): David F. Overton,Robert D. Broadston. Includes bibliographical references (p. 97-98). Also available online.

Submitted by Renata Lopes (renatasil82@gmail.com) on 2016-03-29T14:28:44Z No. of bitstreams: 1 annaelisamartins.pdf: 29809625 bytes, checksum: 335c9c3ea05f09abdd389ff9ab9c36f6 (MD5) / Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2016-04-24T02:48:04Z (GMT) No. of bitstreams: 1 annaelisamartins.pdf: 29809625 bytes, checksum: 335c9c3ea05f09abdd389ff9ab9c36f6 (MD5) / Made available in DSpace on 2016-04-24T02:48:04Z (GMT). No. of bitstreams: 1 annaelisamartins.pdf: 29809625 bytes, checksum: 335c9c3ea05f09abdd389ff9ab9c36f6 (MD5) Previous issue date: 2013-06-27 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / A cidade de Juiz de Fora, Minas Gerais, está passando desde o final dos anos 2000, pelo processo de implantação do Parque Científico e Tecnológico de Juiz de Fora e Região, cuja proposta de multifocalidade atenderia às áreas de transferência de tecnologia da UFJF, às respectivas linhas de desenvolvimento tecnológico e de produção científica, em associação com outras duas entidades. Apresentado como um projeto inovador, fundamentado naqueles que vêm sendo instalados em todo o mundo, o objetivo desta dissertação é apresentar um modelo de organização produtiva ocorrida na primeira metade do século XX, na Escola de Engenharia, utilizando-se para isso a pesquisa em fontes primárias, entrevistas, jornais, folhetos de anúncio, propaganda e pequenos informes de circulação locais antigos, além da análise de instrumentos legais municipais, estaduais e federais, como leis, decretos, artigos, estatutos e resoluções para complementação da base teórica. Foi traçada uma linha evolutiva e preenchida lacunas sobre a história da Faculdade de Engenharia, descobrindo-se assim as razões do pioneirismo das associações entre empresas, governos, pesquisadores e universidades, chegando-se à conclusão de que entre os anos de 1940 e 1960 foi desenvolvido um modelo de produção que conseguiu aliar os potenciais industriais com os da prestação de serviços na área educacional, configurando o Partec como o primeiro parque científico e tecnológico da região. / The city of Juiz de Fora, Minas Gerais, is passing since de end of 2000´s, by the process of implementing of the Scientific and Technological Park of Juiz de Fora and Region, whose proposed is to multifocality attend to the areas of technology transfer from UFJF, their lines of technological development and scientific production in association with two other entities. Presented as an innovative project based on those that have been installed worldwide, the goal of this dissertation is to present a model of productive arrangement occurred in the first half of the twentieth century, in the School of Engineering, using it for research, primary sources, interviews, newspapers, advertising brochures, and small reports circulating ancient sites, and analysis of local, state and federal legal, as laws, decrees, articles, and resolutions to complement the theoretical basis. It is hoped that a line can be drawn evolutionary and filled gaps on the history of the Faculty of Engineering, thus discovering the reasons for pioneering associations between companies, governments, researchers and universities, coming to the conclusion that between the years 1940 and 1960 we developed a model of productive arrangement that could combine with the industrial potential of services in education, setting the Partec as the first scientific and technology park in the region.