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Alila, Younes. "A regional approach for estimating design storms in Canada." Thesis, University of Ottawa (Canada), 1994. http://hdl.handle.net/10393/6831.
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The current design storm estimation method used in Canada is based on single site frequency analysis and single site intensity-duration-frequency relationships and involves large uncertainties, especially at short-term record stations and ungauged sites. To overcome the shortcoming of the current approach, a new improved method based on regional frequency analysis and regional depth-duration-frequency equations is proposed. The L-moments are used in the three stages of regional frequency analysis, namely the delineation of homogenous regions, the identification of a regional parent distribution, and the estimation of distribution's parameters. Following a numerical analysis of short duration (5 minutes to 24 hours) rainfall extremes from 375 stations, it was found that Canada may be considered as one homogeneous region where L-skewness and L-kurtosis display no significant spatial variability. Also, based on mean annual precipitation (map), Canada may be subdivided into climatologically homogeneous sub-regions, wherein the L-coefficient of variation in virtually constant. The regional parent distribution was identified as the general extreme value (GEV), the parameters of which depend on the map and storm duration. These findings are different from the present method, where the extreme value type I (EVI) is used irrespective of storm duration. A hierarchical regional approach is proposed for fitting the identified GEV distribution, where the L-skewness, L-coefficient of variation, and mean are estimated on a regional, sub-regional, and at-site basis, respectively. Monte Carlo simulation studies indicate that the hierarchical regional GEV frequency approach is substantially more accurate than the single site frequency method. In particular, it is shown that three times as much data are required for the single site method to provide the same accuracy as the hierarchical regional approach. The depth-duration and depth-frequency ratios computed by the developed hierarchical regional GEV approach are used to assess the hypothesis that convective cells associated with short duration storms (i.e. less than 120 minutes) have common properties in different hydrologic regions. Depth-duration ratios (defined as the ratios of the t-min to the 60-min rainfall depth of the same return period) are found to be independent of return period and geographical location for any storm less than 60 minutes. However, for storms of longer durations, depth-duration ratios depend on both the return period and the geographical location indexed by the at-site map. Depth-frequency ratios (defined as the ratios of the T-yr to the 10-yr rainfall depths of the same storm duration) are also found to depend on the return period and geographical location. Hence, the assumption of geographically independent depth-frequency ratios used in previous studies is incorrect. Generalized expressions of depth-duration and depth-frequency ratios are combined to develop a set of regional depth-duration-frequency equations that are applicable in Canada. These equations are found to be more accurate than other regional equations developed in previous studies. Furthermore, a split sampling experiment has verified that the proposed equations reproduce the rainfall frequency data at long-term record stations in different hydrologic zones better than the existing single site AES equations. Finally, the proposed hierarchical regional GEV approach and depth-duration-frequency equations are combined to develop a new design storm estimation method at ungauged sites. This method is shown to be a viable alternative to the current arbitrary interpolation procedure from isoline maps.
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Mahbub, S. M. Parvez Bin, and s. mahbub@qut edu au. "Stochastic Disaggregation of Daily Rainfall for Fine Timescale Design Storms." Central Queensland University. Centre for Railway Engineering, 2008. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20080813.151345.
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Rainfall data are usually gathered at daily timescales due to the availability of daily rain-gauges throughout the world. However, rainfall data at fine timescale are required for certain hydrologic modellings such as crop simulation modelling, erosion modelling etc. Limited availability of such data leads to the option of daily rainfall disaggregation. This research investigates the use of a stochastic rainfall disaggregation model on a regional basis to disaggregate daily rainfall into any desired fine timescale in the State of Queensland, Australia. With the incorporation of seasonality into the variance relationship and capping of the fine timescale maximum intensities, the model was found to be a useful tool for disaggregating daily rainfall in the regions of Queensland. The degree of model complexity in terms of binary chain parameter calibration was also reduced by using only three parameters for Queensland. The resulting rainfall Intensity-Frequency-Duration (IFD) curves better predicted the intensities at fine timescale durations compared with the existing Australian Rainfall and Runoff (ARR) approach. The model has also been linked to the SILO Data Drill synthetic data to disaggregate daily rainfall at sites where limited or no fine timescale observed data are available. This research has analysed the fine timescale rainfall properties at various sites in Queensland and established sufficient confidence in using the model for Queensland.
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Powell, Anthony Edward. "An analysis of the impact of climate change on urban drainage design storms." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1460870.
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Peng, Yanlei. "A retrospective study of dust storms and respiratory hospitalizations in El Paso, Texas using a case-crossover study design." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
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Elfström, Daniel, and Max Stefansson. "How design storms with normally distributed intensities customized from precipitation radar data in Sweden affect the modeled hydraulic response to extreme rainfalls." Thesis, Uppsala universitet, Luft-, vatten- och landskapslära, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-437729.
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Intense but short-term cloudbursts may cause severe flooding in urban areas. Such short-term cloudbursts mostly are of convective character, where the rain intensity may vary considerably within relatively small areas. Using uniform design rains where maximum intensity is assumed over the whole catchment is common practice in Sweden, though. This risks overestimating the hydraulic responses, and hence lead to overdimensioning of stormwater systems. The objective of this study was to determine how the hydraulic response to cloudbursts is affected by the spatial variation of the rain in relation to the catchment size, aiming to enable improved cloudburst mapping in Sweden. Initially, the spatial variation of heavy rains in Sweden was investigated by studying radar data provided by SMHI. The distribution of rainfall accumulated over two hours from heavy raincells was investigated, based on the assumption that the intensity of convective raincells can be approximated as spatially Gaussian distributed. Based on the results, three Gaussian test rains, whose spatial variation was deemed a representative selection of the radar study, were created. In order to investigate how the hydraulic peak responses differed between the Gaussian test rains and uniform reference rains, both test and reference rains were modeled in MIKE21 Flow model. The modelling was performed on an idealised urban model fitted to Swedish urban conditions, consisting of four nested square catchments of different sizes. The investigated hydraulic peak responses were maximum outflow, proportion flooded area and average maximum water depth. In comparison with spatially varied Gaussian rains centered at the outlets, the uniform design rain with maximum rain volume overestimated the peak hydraulic response with 1-8%, independent of catchment size. Uniform design rains scaled with an area reduction factor (ARF), which is averaging the rainfall of the Gaussian rain over the catchment, instead underestimated the peak response, in comparison with the Gaussian rains. The underestimation of ARF-rains increased heavily with catchment size, from less than 5 % for a catchment area of 4 km2 to 13 - 69 % for a catchment area of 36 km2. The conclusion can be drawn that catchment size ceases to affect the hydraulic peak response when the time it takes for the whole catchment to contribute to the peak response exceeds the time it takes for the peak to be reached. How much the rain varies over the area which is able to contribute to the peak response during the rain event, can be assumed to decide how much a design rain without ARF overestimates the peak responses. If the catchment exceeds this size, an ARF-scaled rain will underestimate the peak responses. This underestimation is amplified with larger catchments. The strong pointiness of the CDS-hyetograph used in the study risks underestimating the differences in hydraulic peak responses between the test rains and a uniform rain without ARF, while the difference between test rains and uniform rains with ARF risks being overestimated.Intensiva men kortvariga skyfall kan orsaka omfattande översvämningsproblematik i urbana områden. Trots att sådana kortvariga skyfall oftast är av konvektiv karaktär, där regnintensiteten kan variera avsevärt inom relativt små områden, används idag uniforma designregn där maxintensitet antas över hela avrinningsområdet. Detta riskerar att leda till en överskattning av hydrauliska responser, och följaktligen överdimensionering av dagvattensystem. Denna studie syftar till att utreda hur den hydrauliska responsen av skyfall påverkas av regnets spatiala variation, i relation till avrinningsområdets storlek. Ytterst handlar det om att möjliggöra förbättrad skyfallskartering i Sverige. Initialt undersöktes den spatiala variationen hos kraftiga regn i Sverige, genom en studie av radardata tillhandahållen av SMHI. Utbredningen av regnmängd ackumulerad över två timmar från kraftiga regnceller undersöktes utifrån antagandet att intensiteten hos konvektiva regnceller kan approximeras som spatialt gaussfördelad. Baserat på resultatet skapades tre gaussfördelade testregn vars spatiala variation ansågs utgöra ett representativt urval från radarstudien. För att undersöka hur de hydrauliska responserna skiljer sig åt mellan de gaussfördelade testregnen och uniforma referensregn, modellerades såväl test- som referensregn i MIKE 21 Flow model. Modelleringen utfördes på en idealiserad stadsmodell anpassad efter svenska urbana förhållanden, bestående av fyra nästlade kvadratiska avrinningsområden av olika storlekar. De hydrauliska responser som undersöktes var maximalt utflöde, maximal andel översvämmad yta samt medelvärdesbildat maximalvattendjup, alltså toppresponser. Jämfört med spatialt varierade gaussregn centrerade kring utloppen överskattade ett uniformt designregn med testregnens maximala volym de hydrauliska toppresponserna med 1-8 %, oberoende av avrinningsområdets storlek. Uniforma designregn skalade med area reduction factor (ARF), vilken medelvärdesbildar gaussregnets nederbörd över avrinningsområdet, underskattade istället toppresponsen jämfört med gaussregnen. ARF-regnets underskattning ökade kraftigt med avrinningsområdets storlek, från mindre än 5 % för ett avrinningsområde på 4 km2, till 13 - 69 % för ett avrinningsområde på 36 km2. Slutsatsen kan dras att avrinningsområdets storlek upphör att påverka den hydrauliska toppresponsen, då tiden det tar för hela avrinningsområdet att samverka till toppresponsen överstiger tiden till denna respons. Hur mycket regnet varierar över det område som under regnhändelsen hinner samverka till toppresponsen, kan antas avgöra hur mycket ett designregn utan ARF överskattar toppresponserna. Överstiger avrinningsområdet denna storlek kommer ett ARF-regn att underskatta toppresponserna, och underskattningen förstärks med ökande avrinningsområdesstorlek. Den kraftiga temporala toppigheten hos den CDS-hyetograf som användes i studien riskerar att underskatta skillnaderna i hydraulisk topprespons mellan testregnen och ett uniformt regn utan ARF, medan skillnaden mellan testregn och uniforma regn med ARF istället riskerar att överskattas.
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Gachahi, Lydiah Wangechi. "A comparative analysis of long-term variations of temperature and rainfall in rural and urban areas, and their effects on the estimation of design storms in Kenya." University of the Western Cape, 2016. http://hdl.handle.net/11394/5865.
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Philosophiae Doctor - PhD (Earth Science)My Thesis aimed at expanding the current knowledge on how variations of temperature characteristics including the possible existence of urban heat islands (UHI) over urban areas of Kenya could be influencing rainfall characteristics, and to examine if the stationary extreme value distributionis still suitable for modeling urban storm designs in view of the global climate change. My hypothesis was that the floodingoccurring frequently in major urban areas of Kenya are due to increased rainfall caused by global climate change, and the urban heat island (UHI) effect. To put this perception into perspective, temperature and rainfall characteristics and their inter-relationships, of four of the major urban areas in Kenya namely, Nairobi, Mombasa, Kisumu, and Nakuru, were investigated. I obtained data from meteorological stations in and around each urban area, which had at least thirty (30) years of continuous monthly (or daily) temperatures and rainfall values, from the Kenya Meteorological Department. I checked the datasets for quality and missing values and adjusted where necessary before commencing with analysis. I sourced other supporting global dataset from various websites' data banks.I used various methods of data analysis which included; i) exploratory data analysis techniques such as the continuous wavelet transform (CWT), geographical information system (GIS) maps, and visual time series plots. In particular and unique in my Thesis was the use of the CWT method as a diagnostic tool to examine non-stationaritiesand variability of temperature and rainfall time series.
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Girnius, Lígia de Souza. "Análise comparativa do efeito da distribuição espaço-tempo em eventos pluviométricos intensos na formação de vazões em bacias urbanas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3147/tde-25082016-100737/.
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Esta pesquisa tem como finalidade discutir os impactos da variabilidade espacial e temporal de precipitações intensas nas vazões de cursos d\'água em bacias urbanizadas mediante a análise de dados históricos da pluviometria obtidos durante eventos críticos. A bacia hidrográfica do rio Tietê, em sua porção mais urbanizada, é a área objeto deste estudo. Após uma revisão sobre o tema na literatura específica, foram desenvolvidas chuvas de projeto com os padrões observados e com padrões teóricos, frequentemente utilizados na geração das tormentas sintéticas. O volume total precipitado foi associado ao período de retorno (TR) de 100 anos, a partir da análise estatística de chuvas pontuais e pela aplicação de fatores de redução de área (FRA) observados na área em estudo e de outras regiões, que vêm sendo utilizados em projetos de drenagem, sem qualquer estudo de validação; o intuito foi o de demonstrar a importância da definição de FRA específicos, a fim de evitar superdimensionamentos e otimizar as soluções. As chuvas de projeto foram aplicadas num modelo matemático de transformação chuva-vazão, devidamente calibrado, para obtenção das vazões de projeto resultantes no limite de jusante da bacia hidrográfica, frente aos diferentes padrões de solicitações hidrológicas. Para auxiliar a calibração do modelo estavam disponíveis dados dos postos telemétricos do Sistema de Alerta a Inundações de São Paulo - SAISP, curvas-chave e, para melhor representação dos eventos de precipitação observados, pode-se contar com as imagens do radar de Ponte Nova, em complementação às informações da rede de superfície. A comparação dos resultados obtidos no modelo hidrológico mostrou que os efeitos dos parâmetros variáveis (volume, distribuição espacial e temporal) são expressivos na composição dos hidrogramas de projeto. Dos testes realizados, identificaram-se as situações mais e menos críticas para a bacia, em termos de distribuição espacial e temporal e duração da chuva de projeto, além de estabelecer as diferenças no dimensionamento do sistema de drenagem pela adoção de FRA específico. Concluiu-se que, pela metodologia proposta, é possível chegar a vazões máximas de projeto apenas pela simulação de tormentas sintéticas, com diferenças de 10% a 20% das tormentas observadas maximizadas. Há, no entanto, a necessidade de realização de estudos adicionais, tanto para definição dos valores de FRA específicos, quanto de simulação de quantidade maior de padrões críticos observados, para a aplicação prática das indicações desse estudo com maior confiabilidade.This research aims to discuss the impact of the spatial and temporal variability of heavy rainfall in the river flows in urbanized catchments by the historical rainfall data analysis obtained during critical events. The Tiete River catchment, in its most urbanized portion, is the subject of study of this research. After a review of the subject in the specific literature, design rainfall was developed along with the observed and theoretical patterns, often used in the generation of synthetic storms. The total volume precipitated was associated with the 100 years return period (RP), from the statistical analysis of point rainfall and for the application of areal reduction factors (ARF) observed in the study area and in other regions, which have been used in drainage projects without any validation study; the intention was to demonstrate the importance of the definition of specific ARF, in order to avoid oversizing and optimizing solutions. The design precipitation was applied on rainfall-runoff mathematical model, properly calibrated, so as to obtain the resulting design flow at the downstream boundary of the catchment, facing the different patterns of hydrological solicitations. In order to assist the calibration of the model, available data has been used from telemetric stations of the Sistema de Alerta a Inundações de São Paulo (São Paulo Flooding Alert System) - SAISP, discharge curves, and for better representation of the observed precipitation events, can be counted on the images taken from the Ponte Nova radar, as a complement to the information from the surface network. The comparison of the results of the hydrological model has shown that the effects of the variable parameters (volume, spatial and temporal distributions) are significant in the composition of the design hydrograph. Out of the performed tests, the most and the least critical situations were identified concerning the catchment in terms of both spatial and temporal distribution as well as the duration of the design storm. Also, the differences in the dimensions of the of the drainage system design were established by the adoption of specific ARF. Thus, it has been concluded, according to the proposed methodology, that it is possible to reach maximum design flow just by simulating synthetic storms, with differences ranging from 10% to 20% of the observed storms maximized. However, there is a need for additional studies, either to set up setting specific values of ARF or to simulate a larger quantity of critical patterns observed, in order to apply the indications of this study with higher reliability.
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DOU, JIAYUN. "Harmonious Storm." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-20320.
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The intention with this imaginary storm in the form of a decorative lamp ‘Harmonious Storm’ is meant to hang from the ceiling, sculptural and often glowing with artificial light. Meanwhile it enhances the attractive value in the specific public space. The relation between importance of aesthetics and interior public environment is discussed in this thesis, with a purpose of achieving emotional and social needs that are excitement and happiness.Program: Konstnärligt masterprogram i mode- och textildesign
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Rong, Sike. "Networking Communications for a Collective Retailing District of Small Scale Brick-And-Mortar Stores." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1593171660317983.
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Watkins, Edwin W. "Extended stormwater detention basin design for pollutant removal." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08042009-040522/.
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Susai, Manickam Sheeba Rose Mary. "Dimensionless Design Charts for Exfiltration in Storm Sewers." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1342544885.
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Toresson, Lena. "Ny stoppning på gammal stomme : utmaningar och lösningar." Thesis, Mittuniversitetet, Avdelningen för design, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-31276.
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Föreliggande uppsats avhandlar arbetet med stoppning och klädsel av en gammal stomme och deproblem och utmaningar det möter. Tanken var att finna metoder för att underlätta arbetet som kananvändas och utvecklas även i andra och framtida tapetseringsuppdrag. Under arbetets gång gjordestester med mallar för att underlätta ställningstaganden kring uppbyggnad och klädsel. Däreftertillverkades en enkel modell för att på ett mer konkret sätt utvärdera och bestämma hur arbetetskulle utföras. Studien visar att den valda arbetsmetoden är meningsfull och användbar.
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Huss, Pace Megan Greer. "Preferences for universal design features in apparel retail stores by older female customers." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1148586601.
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Green, Susan Elaine. "Sticks and stones: a Blue Ridge Mountain retreat." Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/74529.
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Given a sloping wooded site in the Blue Ridge Mountains of North Carolina, the problem of the thesis project was to design a retreat that would fit the environment and the people that would inhabit it. It was a searching for the interdependence between the landscape and the building. Equally important was a search for a structure that would give architectural integrity to the house.
The design process included a time of discovery and clarification of values and priorities. Two additional steps during the schematic design were processes architect Charles Moore referred to as"mapping" and"collecting''. These processes help to establish relationships between the inhabitants and things they recognize.
Structural elements of post and beam construction gave a sense of order in the design layout and helped to organize the spaces within the form of the house. A system of equidistant columns formed by four wood posts also provided the physical linkage between the building and the site. Native field stone was used for the large piers that supported the columns as well as for the perimeter walls of the living room structure.
The inner landscape of the house, the pathways, the rooms and the machines within them, developed from the basic idea that the building would grow from a central axis or “spine” that originated from the outside at the street's edge, extended across the site,and moved into the building to become the main artery of the structure as well as the connection between outside and inside.Master of Architecture
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Tatangsurja, Hendra. "Digital filter design using stored product ROMs." Thesis, University of Ottawa (Canada), 1987. http://hdl.handle.net/10393/5332.
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Alazzawi, Jinan Riadh, and Loredana Alexandrina Farcuta. "Store design : A comparison between luxurious and normal/regular fashion stores." Thesis, Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-14992.
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The purpose of this study is to do a comparison between luxurious fashion stores and normal/regular ones, describe the differences in terms of the store design and discuss the influences and their impact on the customer experience. The second purpose is to give suggestions to normal/regular fashion stores from Sweden regarding improvements that they might need to enhance the customer’s shopping experience. In order to complete this study, both primary and secondary data were collected. Primary data was collected by performing three different methods. First was an observation, which was done in both luxurious and normal/regular fashion stores. An interview was performed with the manager of H&M Västerås. Last but not least method was to apply a questionnaire in order to find out the customer’s opinion concerning their shopping experience. The secondary data was gathered from Mälardalen’s University data bases and library and also from online resources. Conclusion: The luxurious fashion stores have a unique way of displaying their garments, which gives an idea of neatness, comfort and order. They also have special services that add to the customer’s shopping experience, enhancing it. Even thought normal/regular fashion stores are different from luxurious, they give a big importance to the quality, the price and displaying their garments in a specific order. When it comes to the shopping experience customers’ encounter, most of them considered that it is important to have helpful staff, right temperature, appropriate music and light and clean environment. Overall it can be seen, that even thought they are completely different, the normal/regular fashion stores still try to offer the best experience to their customers.
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Tripathy, Sonali. "Detection of phantom inventories at retail stores using a Bayesian approach." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122257.
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Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, System Design and Management Program, 2019Cataloged from PDF version of thesis.
Includes bibliographical references (page 35).
Phantom inventories result from mismatch in the inventory that is actually available at a store on the shelf and the existing inventory as per the data record at any retail store. Inventory on hand (IOH) record for each SKU(stock keeping unit) at any store is summation of on-shelf and back room inventory. Mismatch in this data impacts the product availability at a store and in turn results in lost opportunities of revenues for the store and the CPG (consumer product goods) manufacturer. A phantom inventory remains unnoticed unless an intervention such as regular shelf re-stocking, physical audit or consumer inquiry occurs at the store. However, even these interventions may not coincide with actual shelf stock out event and hence, the phantom inventory would continue to exist. This report proposes a Bayesian approach based on consecutive zero sales in the POS (point of sales system) while inventory IOH remains positive through the observation time. The daily demand is designed using a negative binomial distribution, which is used further to determine the posterior probability of phantom inventories given a specific set of consecutive days without sales of a SKU at a store. The prevalence of phantom inventories is then calculated using all the number of consecutive days without sales for each SKU store combination and is compared to a Gumbel distribution. This approach has been applied on one data set including POS and IOH data provided by a CPG manufacturer, where the prevalence was found to be 11.63%.
by Sonali Tripathy.
S.M. in Engineering and Management
S.M.inEngineeringandManagement Massachusetts Institute of Technology, System Design and Management Program
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Aldulaymi, Mohammed. "Transparency between consumers and grocery stores : Evincer - A design prototype to empower consumer experience during grocery shopping." Thesis, Malmö universitet, Institutionen för konst, kultur och kommunikation (K3), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-45807.
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This study explores how the interaction design techniques approach can contribute to enabling more transparency in physical shopping by creating bridges between consumers and various stakeholders. The aim is to empower the consumers to make informed decisions through obtaining and understanding health and environmental information for individual commodities. Through close collaboration with users, and with the support of active designers, the design process results in the development of an interactive mobile application proposal. The prototype aims to create a hub between consumers and different stakeholders concerning individual products. Furthermore, the prototype grants consumers access to the information they desire, sharing or requesting product feedback from stakeholders and consumers, focusing on the environment and health aspects.
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Ellis, David R. "The design of storm drainage storage tanks for self-cleansing operation." Thesis, University of Manchester, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306464.
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The use of storage tanks in sewerage systems has increased in recent years. The primary functions of such tanks are to attenuate flow and to retain pollutants within the sewer system. The main problem is to provide storage and effective separation of gross and suspended solids without incurring poor self - cleansing and associated high maintenance costs. The size of the required storage volume is dependant on the purpose for which the tank is to be used, but the end product of any design analysis is a fixed volume of storage. This project has involved the development of fullscale and laboratory computer controlled monitoring systems for the purpose of flow visualisation and digital imaging and for the comparative assessment of the sediment removal performance of different geometric configurations of overflow and storage tank. These systems used sophisticated control procedures and the latter had the facility to generate a flow hydrograph of any shape and duration and to superimpose on this hydrograph a pollutograph of synthetic cohesive sediment of any distribution. A wide variety of tanks have been constructed, mainly rectangular in plan shape (some circular), but both online and off-line and with and without an overflow structure. The use of benching to the chamber floor and the inclusion of a dry-weather flow channel were common but not universal features.
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Steiner, Kevin. "Assessing the interior design of storm shelters on a university campus /." Read thesis online, 2009. http://library.uco.edu/UCOthesis/SteinerKC2009.pdf.
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Quick, Jason. "Translating Field Research Through Contextual Inquiry: A Case Study in Retail Workspace Design." Thesis, Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-07102006-150228/.
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Foo, Yong Ning. "A diagnostic analysis of retail out-of-stocks." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/41734.
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Thesis (S.M.)--Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2007.Includes bibliographical references (p. 101).
In the highly competitive retail industry, merchandise out-of-stock (OOS) is a significant and pertinent problem. This thesis performs a diagnostic analysis on retail out-of-stocks using empirical data from a major retailer. In this thesis, we establish the empirical relationship of OOS rate with the amount of safety stock carried, the time between orders and the forecast error, providing insights to the effects of these three factors on the probability of OOS occurrences. The root causes of OOS are also examined in the thesis. We find that up to 34% of OOS can be attributed to forecast error while up to 22% can be attributed to delay in order replenishment. For the OOSs that were associated with order delay, we can trace 60% of these to out-of-stock at the store's distribution center (DC). The thesis also examines a peculiarity in the occurrence of OOSs. We found that the OOS rate of Class C items is significantly higher in stores with higher sales volume. We can attribute much of this phenomenon to three factors: stores with higher sales volume hold less safety stock for Class C items, have a shorter time between orders and have relatively larger forecast errors.
by Yong Ning Foo.
S.M.
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Kim, Yeonjung. "Design of distribution channel direct sale vs. mixed sale /." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4275.
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Thesis (M.S.)--University of Missouri-Columbia, 2005.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (July 14, 2006) Vita. Includes bibliographical references.
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Lee, Youjung. "A study on the application of contemporary visual art into flagship stores of luxury fashion brands." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/8568.
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Luxury fashion brands face a new challenge as to how to sustain brand growth while maintaining the exclusivity of brands due to the democratisation of the luxury phenomenon which is mainly driven by the emergence of ‘new luxury’ and changes of consumption style ‘trading up’. Luxury consumers are becoming disillusioned with the vulgarisation of luxury goods and prefer exclusive luxurious experiences. In order to keep pace with the changes in luxury consumer needs and promote an image with creative and luxurious connotations, luxury brands increasingly associate with contemporary visual art through diverse kinds of channels. Among the channels, great attention has been given to contemporary visual art exhibitions within a flagship store due to its benefits: geographical location, cutting investment cost and offering direct art experience to consumers. However, there is no theoretical research investigating the main points to be considered in applying contemporary visual art exhibitions to flagship stores of luxury fashion brands. Moreover, there is a need for a systematic approach in applying contemporary visual art exhibitions to flagship stores of luxury fashion brands as relying mainly on a designer’s intuition might pose a problem: delivering different messages from those intended. Through the research, four main propositions were identified which need to be considered when luxury fashion brands apply contemporary visual art exhibitions to their flagship stores: 1) brand communication with consumers, 2) the fit between brand identity and that of an artist, 3) consumers’ value/benefits in the way that enhance consumers’ aesthetic experience of art and 4) artists’ value/benefits. Models including a conceptual model and a design tool kit were developed and tested with experts in this field. The proposed models are decision supporting tools which provide a comprehensive overview regarding the main points to be considered as well as support finding a high fit artist to brand identity. They offer advantages as follows: 1) the conceptual framework improves understanding of the needs/values of the three main stake holders such as luxury fashion brands, consumers and artists for this practice and provides an insight into how to address them in applying contemporary visual art exhibitions to flagship stores of luxury fashion brands 2) the tool kit assists in making a decision when selecting artists or artworks and offers benefits to all the stake holders: 1) luxury brand value by managing their touch points effectively that ultimately lead to enhancing brand communication, 2) consumer value by preventing confusion caused by disharmonious messages from all the touch points within flagship stores, and 3) artist value by finding a matched brand for synergy between brands and artists.
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Storm, Sandra [Verfasser]. "Molecular Modeling and Experimental Design of Surfactant-Based Extraction Processes / Sandra Storm." München : Verlag Dr. Hut, 2015. http://d-nb.info/1071513109/34.
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Ekman, Patrik, and Jens Blomquist. "Conceptual design of a blue water cruiser based on the Storm Bird." Thesis, KTH, Marina system, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-31698.
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This report describes the process of developing a conceptual design of the Storm Bird, a long distance sailing cruiser. The starting point was a boat designed in the mid nineties by the famous Swedish naval architect Håkan Södergren and the aim with the project is to present an idea as to the renewal of the design in a more modern boat. The new Storm bird was supposed to be a full on blue water cruiser concept, a boat that the presumed owner would not have to change in order to set off on his trip.To get insight in the minds and the needs of long distance sailors an extensive market and customer analysis has been undergone. This together with experience in the design team is a base to the thoughts and the ideas incorporated in this design.The hull design was limited to the existing hull moulds meaning that no changes in the hull shape could be made. An alternative however was the transformation from negative to positive transom which proved a very effective way of making the boat feel bigger.The design and layout have been focused on making an effective, well planned but most of all social yacht. The clear boundary between the inside and outside has been removed thanks to a large opening to the cockpit with big windows and good connection. The cockpit and interior areas have been focused towards each other so as to create one big social area, boundary free.Further on the living quarters, as the rest of the boat, are focused on the main idea of the customer being mainly a cruising couple. Therefore an optimal interior layout with focus on the one master cabin has been developedIn the cockpit, seats are comfortable as well as facing forwards and everyone onboard can follow what is going on through the forward placed navigation central. The wide opening between cockpit and interior makes traditional rope handling impossible. All controls are led aft through a clever arrangement to clutches and winches placed on either side of the cockpit instead of on the deck house. This way all functions are in the right position, close to the helmsman. The ropes are later hidden in boxes to ensure a tangle free cockpit.An intelligent overall solution when it comes to onboard systems has been developed as well. Key words have been weight distribution, serviceability and ease of installation. Stowage space and tank volumes correspond to the yacht’s intended use.The structural design has been carried out focusing on arriving at a realistic weight calculation in order to be able to determine centers of gravity and place equipment and ballast to achieve a working concept. Material and manufacturing techniques have been chosen so as to fit the expertise available at the company.Appendage design has focused on modernizing the underwater body by incorporating a new keel and rudder. The performance of the boat has been increased significantly whilst not making it too extreme for its intended purpose.The finished design concept is believed to be a really attractive choice for a blue water sailor.
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Sun, Si'ao. "Decision-making under uncertainty : optimal storm sewer network design considering flood risk." Thesis, University of Exeter, 2010. http://hdl.handle.net/10036/112863.
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Storm sewer systems play a very important role in urban areas. The design of a storm sewer system should be based on an appropriate level of preventing flooding. This thesis focuses on issues relevant to decision-making in storm sewer network design considering flood risk. Uncertainty analysis is often required in an integrated approach to a comprehensive assessment of flood risk. The first part of this thesis discusses the understanding and representation of uncertainty in general setting. It also develops methods for propagating uncertainty through a model under different situations when uncertainties are represented by various mathematical languages. The decision-making process for storm sewer network design considering flood risk is explored in this thesis. The pipe sizes and slopes of the network are determined for the design. Due to the uncertain character of the flood risk, the decision made is not unique but depends on the decision maker’s attitude towards risk. A flood risk based storm sewer network design method incorporating a multiple-objective optimization and a “choice” process is developed with different design criteria. The storm sewer network design considering flood risk can also be formed as a single-objective optimization provided that the decision criterion is given a priori. A framework for this approach with a single objective optimization is developed. The GA is adapted as the optimizer. The flood risk is evaluated with different methods either under several design storms or using sampling method. A method for generating samples represented by correlated variables is introduced. It is adapted from a literature method providing that the marginal distributions of variables as well as the correlations between them are known. The group method is developed aiming to facilitate the generation of correlated samples of large sizes. The method is successfully applied to the generation of rainfall event samples and the samples are used for storm sewer network design where the flood risk is evaluated with rainfall event samples.
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Varghese, Panthalookaran [Verfasser]. "CFD-assisted Characterization and Design of Hot Water Seasonal Heat Stores / Panthalookaran Varghese." Aachen : Shaker, 2007. http://d-nb.info/1166510077/34.
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Panthalookaran, Varghese [Verfasser]. "CFD-assisted Characterization and Design of Hot Water Seasonal Heat Stores / Panthalookaran Varghese." Aachen : Shaker, 2007. http://nbn-resolving.de/urn:nbn:de:101:1-2018090906162432057604.
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Vaidyanathan, Rajkumar. "Investigation of navier-stokes code verification and design optimization." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0005362.
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Aguilera, Alderete Paulina. "Food Stories: A Design Method for Understanding Meaning Through Identity, Emotion, and Experience." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin153563433451446.
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Iqbal, Md Asif. "Seismic response and design of subassemblies for multi-storey prestressed timber buildings." Thesis, University of Canterbury. Civil and Natural Resources Engineering, 2011. http://hdl.handle.net/10092/5379.
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Timber has experienced renewed interests as a sustainable building material in recent times. Although traditionally it has been the prime choice for residential construction in New Zealand and some other parts of the world, its use can be increased significantly in the future through a wider range of applications, particularly when adopting engineered wood material, Research has been started on the development of innovative solutions for multi-storey non-residential timber buildings in recent years and this study is part of that initiative. Application of timber in commercial and office spaces posed some challenges with requirements of large column-free spaces. The current construction practice with timber is not properly suited for structures with the aforementioned required characteristics and new type of structures has to be developed for this type of applications.
Any new structural system has to have adequate capacity for carry the gravity and lateral loads due to occupancy and the environmental effects. Along with wind loading, one of the major sources of lateral loads is earthquakes. New Zealand, being located in a seismically active region, has significant risk of earthquake hazard specially in the central region of the country and any structure has be designed for the seismic loading appropriate for the locality.
There have been some significant developments in precast concrete in terms of solutions for earthquake resistant structures in the last decade. The “Hybrid” concept combining post-tensioning and energy dissipating elements with structural members has been introduced in the late 1990s by the precast concrete industry to achieve moment-resistant connections based on dry jointed ductile connections. Recent research at the University of Canterbury has shown that the concept can be adopted for timber for similar applications. Hybrid timber frames using post-tensioned beams and dissipaters have the potential to allow longer spans and smaller cross sections than other forms of solid timber frames. Buildings with post-tensioned frames and walls can have larger column-free spaces which is a particular advantage for non-residential applications.
While other researchers are focusing on whole structural systems, this research concentrated on the analysis and design of individual members and connections between members or between member and foundation. This thesis extends existing knowledge on the seismic behaviour and response of post-tensioned single walls, columns under uni-direction loads and small scale beam-column joint connections into the response and design of post-tensioned coupled walls, columns under bi-directional loading and full-scale beam-column joints, as well as to generate further insight into practical applications of the design concept for subassemblies. Extensive experimental investigation of walls, column and beam-column joints provided valuable confirmation of the satisfactory performance of these systems. In general, they all exhibited almost complete re-centering capacity and significant energy dissipation, without resulting into structural damage. The different configurations tested also demonstrated the flexibility in design and possibilities for applications in practical structures.
Based on the experimental results, numerical models were developed and refined from previous literature in precast concrete jointed ductile connections to predict the behaviour of post-tensioned timber subassemblies. The calibrated models also suggest the values of relevant parameters for applications in further analysis and design. Section analyses involving those parameters are performed to develop procedures to calculate moment capacities of the subassemblies.
The typical features and geometric configurations the different types of subassemblies are similar with the only major difference in the connection interfaces. With adoption of appropriate values representing the corresponding connection interface and incorporation of the details of geometry and configurations, moment capacities of all the subassemblies can be calculated with the same scheme. That is found to be true for both post-tensioned-only and hybrid specimens and also applied for both uni-directional and bi-directional loading. The common section analysis and moment capacity calculation procedure is applied in the general design approach for subassemblies.
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Bowers, Bryan E. "Development and analysis of computer aided design and drafting software for storm sewers." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80328.
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A software package has been developed for the IBM personal computer that aids engineers in storm sewer design and drafting.
The most unique feature of this software package is its extensive use of the AutoCAD graphics system. The software package uses AutoCAD to enter storm sewer data. Drainage areas, sewer line locations, type of structures, and all other hydrologic parameters can be entered. The software also creates plan and profile drawings of the storm sewer system through AutoCAD. There are other unique features. The software can calculate the hydraulic grade line for the system. If the user enters street centerlines and widths, the program can automatically calculate the exact coordinates for drainage inlet structures located on streets. If contour lines are entered, the program will determine the surface profile above the sewer lines, calculate the approximate elevations of the structures, and check for minimum ground cover when designing the storm sewer system.
Data can be entered two ways in AutoCAD. The first way is to simply enter the numeric values for the parameters. The second way is to enter the raw data and let the program calculate the parameters. An example of this would be, entering a drainage area polygon and letting the program calculate the drainage area, weighted runoff coefficient and the time of concentration.
This software allows the engineer to design and later make changes in the configuration of a storm sewer system quickly and easily.Master of Science
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Yapicioglu, Haluk Smith Alice E. "Retail spatial design with a racetrack aisle network considering revenue and adjacencies." Auburn, Ala., 2008. http://hdl.handle.net/10415/1479.
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Botes, André Romeo. "An artefact to analyse unstructured document data stores / by André Romeo Botes." Thesis, North-West University, 2014. http://hdl.handle.net/10394/10608.
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Structured data stores have been the dominating technologies for the past few decades. Although dominating, structured data stores lack the functionality to handle the ‘Big Data’ phenomenon. A new technology has recently emerged which stores unstructured data and can handle the ‘Big Data’ phenomenon. This study describes the development of an artefact to aid in the analysis of NoSQL document data stores in terms of relational database model constructs. Design science research (DSR) is the methodology implemented in the study and it is used to assist in the understanding, design and development of the problem, artefact and solution. This study explores the existing literature on DSR, in addition to structured and unstructured data stores. The literature review formulates the descriptive and prescriptive knowledge used in the development of the artefact. The artefact is developed using a series of six activities derived from two DSR approaches. The problem domain is derived from the existing literature and a real application environment (RAE). The reviewed literature provided a general problem statement. A representative from NFM (the RAE) is interviewed for a situation analysis providing a specific problem statement. An objective is formulated for the development of the artefact and suggestions are made to address the problem domain, assisting the artefact’s objective. The artefact is designed and developed using the descriptive knowledge of structured and unstructured data stores, combined with prescriptive knowledge of algorithms, pseudo code, continuous design and object-oriented design. The artefact evolves through multiple design cycles into a final product that analyses document data stores in terms of relational database model constructs. The artefact is evaluated for acceptability and utility. This provides credibility and rigour to the research in the DSR paradigm. Acceptability is demonstrated through simulation and the utility is evaluated using a real application environment (RAE). A representative from NFM is interviewed for the evaluation of the artefact. Finally, the study is communicated by describing its findings, summarising the artefact and looking into future possibilities for research and application.MSc (Computer Science), North-West University, Vaal Triangle Campus, 2014
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Sarvghad-Moghadam, Abdoreza. "Seismic torsional response of asymmetrical multi-storey frame buildings." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/NQ42874.pdf.
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SADDI, MONICA SABOIA. "FASHION BRAND STORES: INTEGRATING THE FASHION BRAND IDENTITY TO POINT OF PURCHASE DESIGN PROJECTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=13339@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOA presente pesquisa aborda os projetos de design para pontos de venda de marcas de moda, como importantes veículos de transmissão da identidade das marcas. Analisa os processos de integração desses projetos entre si e com a identidade das marcas. A pesquisa de campo foi realizada através do método de pesquisa-ação participante, durante um ano, para testar um modelo de integração, em duas empresas de varejo de moda no Rio de Janeiro. A pesquisa bibliográfica relaciona a velocidade e efemeridade do contexto atual, com o desafio permanente da construção da identidade e do valor simbólico das marcas de moda; considera os estudos sobre marcas em geral para relacioná-los à dinâmica específica do varejo de moda; desenvolve o conceito ampliado de marca e de marcas de varejo de moda; analisa estratégias de empresas líderes do varejo de moda mundial que exploram os projetos de design do ponto de venda para oferecer aos indivíduos experiências e encontro de significados; destaca a necessidade de gestão desses projetos, para promover maior integração na construção da identidade das marcas de moda, e propõe um modelo de integração para os projetos de design do ponto de venda com a identidade da marca. A pesquisa contribui com o aumento do conhecimento no campo da moda, oferecendo uma abordagem específica desta área, no que diz respeito à gestão das marcas no contexto do varejo de moda e a importância do design nos projetos do ponto de venda, para a construção da identidade das marcas de moda.
This present research approaches the fashion brands point of purchase design projects as an important way of transmission for their brand identity. Assess the process of development and integrating of these projects with one another and with the brand identity. The practical research was realized by a participative action research, during one year, to test a model of integration process, on two fashion retail companies in Rio de Janeiro. The bibliography relates the velocity and ephemerally of the current context, with the permanent challenge to build up the identity and symbolic value of fashion retail brands; consider the studies about general brands to relates them to the fashion retail specific dynamic; develops the broadest brand concept and fashion retail brands concept; analyzes some practices of global fashion retail leaders, who explore points of purchase design projects, offering to their costumers, experiences and meanings; highlights the need of management of these projects to promote more integration to build up the identity of the fashion brands, and propose one model of integration for point of purchase design projects and brand identity. The research expand the knowledge of fashion, offering a specific study of this area, about brand management in fashion retail context and the importance of design in point of purchase projects to build the fashion brand identity.
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Beck, Kade Jacob. "Design of Logan City's Stormwater Conveyance System." DigitalCommons@USU, 2017. http://digitalcommons.usu.edu/etd/6838.
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Logan City is located in northern Utah's Cache County. The average annual rainfall for Cache Valley is between 15 and 20 inches (PRISM 2016). Several times a year, the incomplete storm water system causes flooding, which risks industrial and agricultural lands. The current system collects storm water between 200 West and 1000 West, and discharges the water directly along 1000 West.
Cutler Reservoir, Swift Slough, and the Lower Bear River in Cache Valley do not comply with water quality regulations. The Clean Water Act of 1972 mandates that all municipal separate storm sewer systems (MS4) comply with EPA regulations, expressed as Total Maximum Daily Loads (TMDLs). Logan City's untreated storm water might contribute to the pollution in these water bodies. The pollution threatens surface water, groundwater, and wildlife in the area.
Logan City plans to implement a new wastewater treatment process. However, the new treatment process is not designed to use the existing polishing ponds. Consequently, Logan City hopes to use these polishing ponds to treat storm water.
The implementation of this design improves storm water management. 10th West Engineers (10WE) had three goals. First, design a system to transport water form the discharge locations to the holding pond. Second, design a system that provides irrigation users access to water during a storm. Third, comply with the goals of the client: design a gravity-fed system, minimize effect on wetlands, and produce an economical design.
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Dorman, Michael E. "A methodology for the design of wet detention basins for treatment of highway stormwater runoff." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-08142009-040351/.
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Langlois, Sébastien 1981. "Design of overhead transmission lines subject to localized high intensity wind." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99775.
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Wind loading considered in the design of overhead transmission lines is based on extreme values of synoptic wind, i.e. boundary layer wind originating from largescale meteorological pressure systems. Localized high intensity wind (HIW) storms such as tornadoes and downbursts are a different type of extreme wind frequently causing failures of overhead lines. This thesis covers the design aspects of overhead transmission lines when subject to localized HIW storms. A comprehensive review of the literature is included on the effects of such wind storms on lines and on mitigation measures. Furthermore, several options for the design of self-supporting transmission towers against localized HIW are discussed based on numerical simulations of several simple load cases on four examples of lattice structures.
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Pilette, Claude F. "Seismic response and design of single-storey precast concrete buildings." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70190.
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A series of eight full-scale precast concrete columns and one precast pretensioned wall panel were tested to determine their reversed cyclic loading responses. The specimens represent typical single-storey precast members including the connections to the foundations. This experimental study illustrates the performance of specimens designed using the current design approach recommended by PCI and CPCI. Methods of increasing the stiffness of the connections and improving the levels of ductility are presented. Details consistent with the seismic design provisions of the CSA Standard were investigated and the resulting performance of the columns and the panel are assessed in terms of expected R factors of the National Building Code of Canada (1990).Analytical models are presented to enable the prediction of the reversed cyclic loading responses of the precast column-foundation and wall-foundation subassemblages. These analytical models are compared with the test results and also enabled the assessment of the performance of single-storey precast concrete structures by non-linear dynamic analyses. Design guidelines are presented for single-storey precast structures located in moderate seismic zones.
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Svanerudh, Patrik. "Design support system for multi-storey timber structures : Patrik Svanerudh." Luleå : Luleå University of Technology, 2001. http://epubl.luth.se/1402-1544/2001/20/index.html.
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Acred, Andrew. "Natural ventilation in multi-storey buildings : a preliminary design approach." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/34322.
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Natural ventilation is a low-energy design strategy that has the potential both to significantly reduce energy usage in buildings and to provide a healthy and comfortable indoor environment. It has particular potential for use in tall, multi-storey buildings. However, the integration of natural ventilation into these large building designs has seen mixed success. Furthermore, there is a gap between simple 'rule-of-thumb' design guidance and detailed, computational design tools. This research attempts to bridge the gap between the simple and detailed with the broad aim of providing rapid and intuitive guidance for use in preliminary design. We use a simple mathematical approach to develop a coherent and easy-to-use framework for modelling ventilating flows, which quantifies the interactions between a core set of design variables. We focus in particular on buoyancy-driven ventilation in buildings with atria, ventilation stacks and/or similar vertical spaces that span multiple floors. Simple methods centred around hand calculations and design charts are developed to inform the sizing of vents in an 'ideal design' scenario, in which the desired ventilation flow rates and air temperatures are delivered to all occupants within a building. We define a measure of the ventilation performance of an atrium and use this to provide an indication of when an atrium is beneficial to a ventilation system design and when it is detrimental. We also use a transient flow analysis to consider 'off-design' scenarios, in which undesirable flow regimes may occur, and to place design tolerances on the building envelope. It is hoped that this work will form a point of reference for further research and for future revisions of design guidance literature.
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Rahmati, M. T. "Incompressible Navier-Stokes inverse design method based on unstructured meshes." Thesis, University College London (University of London), 2006. http://discovery.ucl.ac.uk/1445805/.
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Two inverse methods for turbomachinery blade design are developed. In these inverse design approaches blade shapes are computed for a specified design parameter such as mass-averaged tangential velocity or pressure loading distribution. These inverse methods directly define a geometry needed to obtain these prescribed target design parameters which are related to the performance of turbomachinery blades. The first method is based on the prescription of pressure loading on the blade while the second method is based on the prescription of mass-averaged tangential velocity on the blade. In both methods the blade thickness is also prescribed. These choices of target design prescription allow the designer to control the blade work distribution and the overall flow field effectively. It also prevents the generation of unrealistic blades as the designer directly control the blade thickness. Mesh movement algorithm is an integral part of the current inverse design method as once the blade surface is modified during the design iterations the corresponding unstructured mesh also has to be altered. The mesh movement algorithm is based on a linear tension spring analogy which is a very fast and robust mesh movement method. The capabilities of these design methodologies have been verified for inverse design of two dimensional turbomachinery blades. The flow analysis algorithm is an integral part of the current methodologies. It is based on the incompressible Navier-Stokes flow equations on unstructured meshes. The capability of the flow analysis algorithm is verified for three-dimensional external and internal incompressible flow solutions. Indeed the current method is applied for simulation of flow over marine propeller blades in open water. Also it is applied for the flow analysis of the stator and rotor blades of a low-speed axial turbine.
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Ulker, Kivanc. "Development Of A Wing Design Tool Using Euler/navier-stokes Flow Solver." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606976/index.pdf.
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A three dimensional wing design tool with analysis functions has been
developed with embedded Euler/Navier-Stokes flow solver and a three
dimensional hyperbolic grid generator. A graphical user interface has
been constructed using PYTHON script language and the tool was
enhanced with pre-processing and post-processing capabilities. Analysis
and design procedures are demonstrated with automatic grid generation,
automatic series solution and automatic graphs and reports generation.
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Najafi, Zahra. "Development of New Treatment Modalities for Kidney/Ureter Stones." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1435153573.
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Kim, Sung-Hong. "Visual and spatial metaphors of shop architecture." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/21672.
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Aoussou, Jean Philippe. "An iterative pressure-correction method for the unsteady incompressible Navier-Stokes Equation." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104554.
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Thesis: S.M., Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2016.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 53-59).
The pressure-correction projection method for the incompressible Navier-Stokes equation is approached as a preconditioned Richardson iterative method for the pressure- Schur complement equation. Typical pressure correction methods perform only one iteration and suffer from a splitting error that results in a spurious numerical boundary layer, and a limited order of convergence in time. We investigate the benefit of performing more than one iteration. We show that that not only performing more iterations attenuates the effects of the splitting error, but also that it can be more computationally efficient than reducing the time step, for the same level of accuracy. We also devise a stopping criterion that helps achieve a desired order of temporal convergence, and implement our method with multi-stage and multi-step time integration schemes. In order to further reduce the computational cost of our iterative method, we combine it with an Aitken acceleration scheme. Our theoretical results are validated and illustrated by numerical test cases for the Stokes and Navier-Stokes equations, using Implicit-Explicit Backwards Difference Formula and Runge-Kutta time integration solvers. The test cases comprises a now classical manufactured solution in the projection method literature and a modified version of a more recently proposed manufactured solution.
by Jean Philippe Aoussou.
S.M.
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Hunt, Christopher L. "Treatment of highway storm water runoff by constructed wetlands analytical analysis and design model." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1177436685.
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Thompson, David R. "An expert system for the preliminary design of single storey non-domestic timber roof structures." Thesis, University of Brighton, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278946.
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