Dissertations / Theses on the topic 'Foundry technology'
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Xie, Yiran. "Recycling of foundry waste materials." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6737/.
Full textDu, Preez W., A. Paine, and R. Bean. "Product development within the framework of a National Casting Technology Centre." Journal for New Generation Sciences, Vol 4, Issue 1: Central University of Technology, Free State, Bloemfontein, 2006. http://hdl.handle.net/11462/488.
Full textThe need for a state of the art advanced National Casting Technology Centre (NCTC) has been widely supported throughout industry and recognised as an important facilitator in the growth of the foundry industry. This initiative also aligns itself with the government's Advanced Manufacturing Technology Strategy (AMTS), which is an implementation strategy in support of the South African government's Integrated Manufacturing Strategy (IMS) and National R&D Strategy (NRDS). The AMTS aims at supporting and developing the downstream high technology manufacturing industry, inter alia through the aerospace, automotive and metals sectors.
In light of the above and in an effort to retain and expand the current national skills, expertise and facilities in advanced casting technologies, the National Product Development Centre at the CSIR has initiated a process of establishing a National Casting Technology Centre (NCTC). The establishment of the NCTC provides a supportive technology platform for the Advanced Metals Initiative (AMI), which was launched in 2003.
The primary objective of the NCTC is to preserve and expand the national expertise and capabilities in cast metals manufacturing by supporting the local casting industry with process development, technology transfer and skills enhancement in order to increase their global competitiveness.
Wu, Shih-Lung 1963. "Industry dynamics within semiconductor value chain : IDM, foundry and fabless." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29721.
Full textIncludes bibliographical references (leaf 60).
This thesis intends to analyze the semiconductor value chain and identify critical factors, which impact the future industry structure. The main focus is in the dynamics among IDM (Integrated Design Manufacture), foundry and fabless companies. This analysis will utilize double helix [1] model with consideration of economics of scale, fixed cost and product life cycle. Furthermore, the cost and time-to-market factors involved in SoC (system-on-chip) and FPGA/PLD development will be explored. Based on the analysis, a tool will be developed to evaluate make-or-buy (developing own SoC or using off-shelf FPGA/PLD) decision.
by Shih-Lung Wu.
S.M.M.O.T.
Rahimi, Ardkapan Siamak, and Maral Rahimi. "In-depth Evaluation of Energy Management Practices in a Swedish Iron Foundry." Thesis, Linköpings universitet, Energisystem, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56911.
Full textHerzán, Jiří. "Návrh technologie výroby odlitků ze slitin mědi s ohledem na jejich kvalitu a pracnost dokončovacích operací." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400504.
Full textKlinsky, Luis Miguel Gutiérrez. "Proposta de reaproveitamento de areia de fundição em sub-bases e bases de pavimentos flexíveis, através de sua incorporação a solos argilosos." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-07082008-162426/.
Full textOne of the biggest problems of the foundry industry is the solid residues production, constituted basically by sands. The use of additives and binders in the foundry process reduces the reuse of the sand and the remainder is discarded in industrial landfills or stockpiled on site, although the good quality of the sand as aggregate for manufactured products such as Portland cement, asphalts and geotechnical applications such as road bases, structural fills, embankments and manufactured soils. The foundry production, in year 2007, in Brazil, exceeded three millions tons, and it is had that for each ton of produced metal, a ton of foundry residue results approximately. The long term sustainability, economics and reuse practices suggest that alternative use practices must be done for the foundry sand and the roadways construction supply such opportunities. The purpose of this work is to evaluate the reuse of foundry sand as a construction material for road bases and sub-bases, trough its incorporation to clay lateritic soils from Sertaozinho, Sao Paulo state region. This region has a highly production of foundry metals and residues, and does not have natural sandy soils deposits for the construction of highways and urban roads. The technique used in this study was de soil assembly; foundry sand and virgin sand were mixed with two clay lateritic soils in different proportions. Tests were made in the soil-sand mixes to evaluate the sand addition influence in the mechanic soil behaviour, which are: liquid limit and plastic limit, granulometry, mini-MCV, immersion lost mass, mini-CBR at the intermediate energy, expansion, contraction, CBR at the intermediate energy, infiltrability, permeability and dynamic triaxial. Also, environment tests - leaching and solubility - were made to establish the hazard of the foundry sand. The results show that lateritic clay soils with 60% of foundry sand added has adequate mechanical properties to be used as base and sub-base material for low traffic pavements, according to the DER-SP(1991) specifications and the DNIT Manual Pavement (2006). The environment tests indicate that the foundry sand residue, used in this work, has promising use in road bases and sub-bases.
Pastore, Thomas Earl. "Financial Resources and Technology to Transition to 450mm Semiconductor Wafer Foundries." ScholarWorks, 2014. https://scholarworks.waldenu.edu/dissertations/93.
Full textChastain, Matthew Lincoln. "The ceramic technology of bronze-casting molds in ancient China : production practices at three western Zhou foundry sites in the Zhouyuan area." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122073.
Full textThesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2019
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 681-718).
During the second and first millennia BCE, peoples living near China's Yellow and Yangzi Rivers produced bronze ritual and military paraphernalia that represent arguably the most sophisticated use of metal casting by any ancient society. These objects were cast by pouring bronze into mold assemblies composed of interlocking sections. To survive the mechanical and thermal rigors of this casting process, the mold sections were constructed from highly specialized ceramic materials. This study investigates these ceramic materials. The primary focus is three foundry sites (Zhougongmiao, Kongtougou, Lijia) in the Zhouyuan area, Shaanxi province, a major bronze production center during the Western Zhou period (1045-771 BCE). Casting molds (72 total), other ceramic artifacts, and soils, all from the Zhouyuan area, were analyzed using electron microscopy, optical microscopy, and infrared spectroscopy.
Results were compared to similar analyses of molds from other sites in China (Houma, Xinzheng, Tangjiadun, Shigudun). Replication experiments were undertaken to reconstruct the production process of casting molds and to identify the performance advantages of ancient casting-mold material. Casting molds were made from a material unlike the clay-rich pastes used for pottery. This material, here called "silt paste", consists of a porous network of silt-sized (3.9-62.5[mu]m) quartz particles held together by a small proportion of clay. Across north-central China, similar material was used to make molds for all types of bronze objects. Silt paste was produced from commonplace loessic soils. Its composition and properties were manipulated by processing the soil to remove much of its clay. The resulting low-clay paste offers little workability, requiring specialized forming techniques. "Piping" was used to decorate some molds. Molds were fired at 400-700°C.
The low clay content and low firing temperature of casting-mold material ensured minimal drying shrinkage and high thermal shock resistance, minimizing the risk of failure during the casting process. Producers at the three Zhouyuan-area sites practiced different engineering strategies, apparently because casting technology descended from the earlier Shang tradition was introduced into the area midway through the Western Zhou period. Differences in soil resources between northern and southern China may have influenced how bronze casting developed in each region.
by Matthew Lincoln Chastain.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Materials Science and Engineering
Šebesta, Pavel. "Ovlivnění zbytkových pevností slévárenských jader s biogenním pojivem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231111.
Full textNyembwe, Kasongo Didier. "Tool manufacturing by metal casting in sand moulds produced by additive manufacturing processes." Thesis, Bloemfontein : Central University of Technology, Free State, 2012. http://hdl.handle.net/11462/162.
Full textIn this study an alternative indirect Rapid Tooling process is proposed. It essentially consists of producing sand moulds by Additive Manufacturing (AM) processes followed by casting of tools in the moulds. Various features of this tool making method have been investigated. A process chain for the proposed tool manufacturing method was conceptually developed. This process chain referred to as Rapid Casting for Tooling (RCT) is made up of five steps including Computer Aided Design (CAD) modeling, casting simulation, AM of moulds, metal casting and finishing operations. A validation stage is also provided to determine the suitability of the tool geometry and material for RCT. The theoretical assessment of the RCT process chain indicated that it has potential benefits such as short manufacturing time, low manufacturing cost and good quality of tools in terms of surface finish and dimensional accuracy. Focusing on the step of AM of the sand moulds, the selection of available AM processes between the Laser Sintering (LS) using an EOSINT S 700 machine and Three Dimensional Printing using a Z-Corporation Spectrum 550 printer was addressed by means of the Analytic Hierarchy Process (AHP). The criteria considered at this stage were manufacturing time, manufacturing cost, surface finish and dimensional accuracy. LS was found to be the most suitable for RCT compared to Three Dimensional Printing. The overall preferences for these two alternatives were respectively calculated at 73% and 27%. LS was then used as the default AM process of sand moulds in the present research work. A practical implementation of RCT to the manufacturing of foundry tooling used a case study provided by a local foundry. It consisted of the production of a sand casting pattern in cast iron for a high pressure moulding machine. The investigation confirmed the feasibility of RCT for producing foundry tools. In addition it demonstrated the crucial role of casting simulation in the prevention of casting defects and the prediction of tool properties. The challenges of RCT were found to be exogenous mainly related to workmanship. An assessment of RCT manufacturing time and cost was conducted using the case study above mentioned as well as an additional one dealing with the manufacturing of an aluminium die for the production of lost wax patterns. Durations and prices of RCT steps were carefully recorded and aggregated. The results indicated that the AM of moulds was the rate determining and cost driving step of RCT if procurement of technology was considered to be a sunk cost. Overall RCT was found to be faster but more expensive than machining and investment casting. Modern surface analyses and scanning techniques were used to assess the quality of RCT tools in terms of surface finish and dimensional accuracy. The best surface finish obtained for the cast dies had Ra and Rz respectively equal to 3.23 μm and 11.38 μm. In terms of dimensional accuracy, 82% of cast die points coincided with die Computer Aided Design (CAD) data which is within the typical tolerances of sand cast products. The investigation also showed that mould coating contributed slightly to the improvement of the cast tool surface finish. Finally this study also found that the additive manufacturing of the sand mould was the chief factor responsible for the loss of dimensional accuracy. Because of the above, it was concluded that light machining will always be required to improve the surface finish and the dimensional accuracy of cast tools. Durability was the last characteristic of RCT tools to be assessed. This property was empirically inferred from the mechanical properties and metallographic analysis of castings. Merit of durability figures of 0.048 to 0.152 were obtained for the cast tools. It was found that tools obtained from Direct Croning (DC) moulds have merit of durability figures three times higher than the tools produced from Z-Cast moulds thus a better resistance to abrasion wear of the former tools compared to the latter.
Findeisen, Sebastian. "Zykluszeitreduzierung beim Druckgießen durch mehrteiligen Werkzeugaufbau." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2015. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-161111.
Full textLeonard, Charles C. "Paul Renner and Futura: The Effects of Culture, Technology, and Social Continuity on the Design of Type for Printing." Digital Archive @ GSU, 2006. http://digitalarchive.gsu.edu/art_design_theses/2.
Full textArbuckle, Phatty (Phatty Judi). "Startup founders in high technology." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100369.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 63-68).
Startup founders are thought to be the super women and men of the technology world these days. Many founders transition into the Chief Executive Officer (CEO) role within their companies and are expected to have the knowledge to lead large organizations through these fast growth and transition periods at a rate much faster than previously encountered in history. While some founders have backgrounds and experience to leverage in order to help them, many do not. Regardless, many high technology founder CEOs are leading companies that grow from nothing into billion dollar valuations and various stages of growth or failure between. This thesis seeks to investigate key traits of high technology founder CEOs, the technologies they create and manage, and research surrounding their transition from founder into the CEO role to include leadership characteristics. An effort will be made to further understand what contributes to a founder CEOs success and based on that recommendations will be given providing some key guidelines. Lastly, example cases will be showcased to highlight how and what founder CEOs have and are doing to create success for not only them, but also their companies, investors, and employees.
by Phatty Arbuckle.
S.M. in Engineering and Management
Franke, Simone. "Cupolofen-Register 1879 bis 1893." Fachverlag Schiele & Schön GmbH, 2011. https://slub.qucosa.de/id/qucosa%3A3310.
Full textJoshi, Vikas Vasudeo. "The coevolution of technology firms and founders." Thesis, University of Pennsylvania, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10158558.
Full textPrior research cannot explain the surprising fact that some technology firms attain spectacular growth with seemingly inexperienced founders at the helm. Informed by a cognitivist perspective, prior research in entrepreneurship explores founders' epistemology, such as knowledge and skills, and investigates their interaction with firms to explain their influence on firm growth. This framing misses the reciprocal influence between firm growth and founder development. In contrast, informed by a sociocultural perspective, my research investigates the founder’s ontology and the mutual constitution of the founder and the firm. My research draws on practice theory and uses habitus as a sensitizing concept. I build a theory that explains how the dispositional toolkit of a founder evolves with, and contributes to, firm growth. Based on three in-depth case studies of technology companies, I show how technology firms and their founders coevolved. These firms influenced the development of their founders when they used founders as resources in different aspects of business and placed them in changing relationships with others. In turn, tech founders influenced the growth trajectory of their firms when they performed day-to-day practices of business. My grounded theory suggests that founders and firms coevolve in a mutually constitutive relationship. Firm growth changes the conditions under which business practices occur. The founder develops by becoming the resource the changing contexts demand. Furthermore, a growing firm deposits new dispositions in the founder. In practice, situational cues activate a specific disposition, regulating how the founder improvises. The founder’s improvisation in turn influences firm growth. My study advances entrepreneurship research, accounting for structural influences as well as human agency, thus contributing to a previously missing understanding of the coevolution of founders and firms. My study also contributes to practice by producing insights into founder development and firm growth that are relevant for entrepreneurs, board members, and educators.
Keywords: entrepreneurial learning, entrepreneurship, firm growth, founder development, habitus, high technology venture, leadership, leadership development, organizational development, practice theory, startup.
Franke, Simone. "Cupolofen-Register 1879 bis 1893." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-115848.
Full textMikulka, Vít. "Optimalizace technologie výroby Al odlitku litého metodou vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228936.
Full textLyons, Emily E. "Has internet technology found a niche in mood regulation among young adults?" Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1589631.
Full textThe present study investigates whether internet technology is used by young (YA) and older adults (OA) to change bad moods. This study also investigates whether the number of strategies used to try to change a bad mood are significantly higher among YA as compared to OA. Continuity theory, described by Atchley (1989), is used to support the hypothesis that YA will indicate internet use as a mood self-regulation tool, whereas, OA will not. Undergraduate students and adults from local senior clubs and a church choir were surveyed regarding the strategies they use to change a bad mood. Results are analyzed by applying a chi-square test of independence, a t-test, and a factor analysis. Results indicate the difference between YA and OA who use the internet to change a bad mood is approaching significance. Results also indicate YA use more strategies to change a bad mood than do OA.
Jeffreys, Edward D. "Factors found when integrating computer technology in a small rural school district." Morgantown, W. Va. : [West Virginia University Libraries], 2000. http://etd.wvu.edu/templates/showETD.cfm?recnum=1407.
Full textTitle from document title page. Document formatted into pages; contains xi, 99 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 81-91).
Braly, Alan R. (Alan Ryan). "The impact of angel investors on founders of new ventures in the medical technology industry." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68464.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (p. 50-53).
Founders of new ventures in the medical technology (Medtech) industry require capital to establish, sustain, and grow their companies. Most founders must seek some form of external capital to meet these demands; in Medtech, the most well-known and prestigious of these is venture capital (VC). However, another type, angel investors, may be as important as VCs. Angels are accredited investors that invest their own money directly in new ventures. Founders of new Medtech ventures may choose to seek capital from angel investors in addition to, or instead of, venture capitalists. Unfortunately, there is little research available on outcomes for founders and their firms when angel investors are involved. Like VCs, angels seek financial returns from their investments; however, there may be additional and different motivations at play that make angels willing to grant more friendly terms to founders. As a result, it may actually be advantageous for founders to seek capital from angel investors. This paper addresses the question of whether founders of new ventures in the Medtech industry have better outcomes in terms of ownership and control of the company when one or more investment rounds involve angel investors in addition to, or in place of, VCs. Ownership is measured by the amount of equity owned just prior to an IPO, and control by the presence of founders as employees or directors at the time of the IPO. Analyzing S-is from the last 10 years of initial public offerings (IPOs), a dataset was constructed that comprised the shareholders of the 63 Medtech companies that experienced an IPO between 2001 and 2010. Of these, 18 companies had some presence of angel ownership that could be gleaned from the S-1; of those, 12 had at least a 5% stake belonging to angels. Results presented in the paper show, for the first time, those founders of Medtech firms with angel investors as shareholders at the time of IPO have significantly greater ownership of shares and significantly greater control of the firm as an employee or director than founders of firms without angels present. Angel-backed firms required less investment capital and no more time to reach the IPO, and, importantly, did not suffer with respect to the overall valuation of the firm. On the contrary, there was a trend of firms - and founders themselves - seeming to benefit from a valuation perspective, and significantly better from a multiple perspective, when angel investors were present. Even when firms received backing from venture capitalists, angel investor involvement also seemed to generally improve the performance of the firm and of the founders along the measured dimensions.
by Alan R. Braly.
S.M.
Chan, Lai-wah. "An exploratory study on how new founders in the information technology field perceive the meaning of their current career pursuit." Click to view the E-thesis via HKUTO, 2001. http://sunzi.lib.hku.hk/hkuto/record/B42576106.
Full textCheng, Hong Hocking. "Faculty as founder? : an examination of faculty's role in biomedical start-ups." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33079.
Full textIncludes bibliographical references (leaves 56-57).
Executive Summary: In this thesis, I examine faculty inventors' involvement in university spin-off firms formed to commercialize their inventions. In particular, I analyze the association between a faculty inventor's various roles in commercializing his/her invention and the performance of the ensuing fledging ventures. The study is based on a group of spin-off firms from MIT in the biomedical/life science sector between 1976 and 2003. Structured questionnaires were distributed to the 110 faculty inventors identified by the technology licensing office (TLO) in April 2005, yielding 31 valid responses covering 60 companies.
by Hong Hocking Cheng.
S.M.
Vašek, Vojtěch. "Použití modelů zhotovených technologii 3D tisku při výrobě odlitků do bentonitových forem na formovací lince." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319282.
Full textCravalho, Nick. "The dynamics of forming a technology based start-up : how founders use external advice to improve their firm's chance of succeeding." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/42356.
Full textIncludes bibliographical references (leaves 161-167).
External advice can be a valuable resource for founders of high technology startup companies. As with any resource, the pursuit and efficient use of the external advice resource is one of the greatest challenges for founders. This thesis examines how the founders of eleven US venture-backed high-tech companies leveraged external advice to their advantage. By aggregating data extracted from case-based interviews, the characteristics of advice are fully understood. In particular, insights are made into the types of advice these business focused founders received, the types of advisors they selected and considered influential to the development of their company and the way they were connected to these influential advisors. Organizing the data by companies' business characteristics enabled further insights to be drawn. Notably, there was a significant difference in a variety of the advice sought by first time founders compared with that of more experienced founding teams. First time founders received broader and more tactical advice than did experienced founders. Furthermore, first time founder's advisors were much more likely to act as coaches, instilling confidence and expending effort to mentor these first-timers into successful CEOs. Silicon Valley advisors and others affiliated with Silicon Valley companies were much more likely to introduce the founders to their influential network, which illustrates the rich entrepreneurial nature of Silicon Valley. There was no statistically significant difference in advice characteristics based on the size of their founding team or on type of their industry. Since the eleven companies are private and thriving, the selected performance metric was the amount of venture capital raised per year of existence.
(cont.) This less than ideal performance data clearly shows a positive correlation between the size and experience of the founding team with company performance. However, no correlation between company performance and industry and geography could be determined. Since the advice characteristics that were correlated with performance were similar to those of large experienced teams, it is reasonable to conclude that none of the advice characteristics are predictors of success. It follows rather that advice characteristics are more a reflection of the companies' business characteristics than itself a predictor of venture success.
by Nick Cravalho.
S.M.
Njie, Astou. "Entrepreneurial learning in Swedish secondary schools : The new-found game plan." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-39235.
Full textJones, Raymond T. "Prediction of educational technology to be found in the public schools of the year 2000: a Delphi study." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/40331.
Full textEd. D.
Leone, Hľn̈e H. "Language use and linguistic variations found in interactive media: a case study of Francophone youth /." Burnaby B.C. : Simon Fraser University, 2005. http://ir.lib.sfu.ca/handle/1892/2372.
Full textChan, Lai-wah, and 陳麗樺. "An exploratory study on how new founders in the information technologyfield perceive the meaning of their current career pursuit." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B42576106.
Full textBrandt, Mathias, and Stefan Stefansson. "The personality venture capitalist look for in founder: An artificial intelligence approach to personality analysis." Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246077.
Full textKapp, Anine A. C. "Evaluation of temperature variances found with integral reefer containers during shipment of Japanese plums (Prunus salicina Lindl.) at dual and single temperature." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/21447.
Full textENGLISH ABSTRACT: Stone fruit is susceptible to chilling injury and intermittent warming has been shown to alleviate chilling injury during cold storage. A dual temperature storage regime was developed in South Africa for plums based on the principles of intermittent warming. The regime consists of an initial period at -0.5°C, a variable duration warming period at 7.5°C, followed by -0.5°C. Refrigerated integral containers were designed to maintain product temperature and not to reduce product temperature, per se. Considering that dual temperature shipment requires significant refrigeration and effective distribution of cool air to remove sensible- and respiratory heat, the capacity of integral containers to ship plums successfully at dual temperature is questioned. The objectives of this study were, firstly, to analyse pulp temperature data and possibly identify different temperature zones within containers shipping plums at dual temperature. Secondly, to understand the underlying processes differentiating the temperature zones and thirdly, to determine the effect of container performance on fruit quality. Three processes were identified as important characteristics of pulp temperature data sets recorded during dual temperature shipping, namely cooling down, heating up and over heating in the container. The order of importance differed according to the cultivar shipped and the container’s performance. Three temperature zones were identified in dual temperature containers, where the average pulp temperature, time to heat up and time to cool down for each temperature zone increased along the length, across the width from the left to the right and up the container system. The variable temperature conditions were possibly due to a variation in delivery air temperature, poor airflow and the effect of increased respiration and, therefore, production of vital heat by the fruit. The cooling down process was identified as the most important process discriminating the temperature zones. With the exception of ‘Fortune’, variable temperature conditions found within integral containers shipping plums at dual temperature had a significant influence on the fruit firmness post-shipment, where deterioration levels increased from the front to the door end of the container due to an increase in pulp temperature. However, it was also shown that fruit firmness prior to shipment could have a determining effect on differences found. It could not be proven that variable temperature conditions resulted in significantly higher levels of internal defects within the integral container. Temperature zones could not be identified within refrigerated integral containers shipping plums at single temperature, suggesting that the containers are able to maintain the temperature well throughout the container area. A constant 2°C storage temperature could possibly replace the commercial dual temperature regime in the case of ‘Pioneer’ plums due to improved fruit firmness, similar colour development to the control and less sensible heat produced in the container resulting in a more stable container environment. However, unacceptably high levels of shrivel and internal browning were found.
AFRIKAANSE OPSOMMING: Steenvrugte is vatbaar vir koueskade en dit is bewys dat periodieke verwarming gedurende koelopberging koueskade kan verlig. Die dubbeltemperatuur opbergingsregime is in Suid- Afrika ontwikkel vir pruime en is gebaseer op die beginsels van periodieke verwarming. Die regime bestaan uit ‘n inisiële periode by -0.5°C, ‘n variërende periode by 7.5°C, gevolg deur -0.5°C. Verkoelde integrale houers is ontwerp om produktemperature te handhaaf en nie soseer om produktemperatuur te verlaag nie. Die kapasiteit van integrale houers om pruime suksesvol teen dubbeltemperatuur te verskeep word dus bevraagteken, in ag geneem dat dubbeltemperatuurverskeping betekenisvolle verkoeling en effektiewe verspreiding van koue lug vereis om die waarneembare- en respiratoriese hitte te verwyder. Die doelwitte van die studie was eerstens om die pulptemperatuurdata te analiseer en moontlik verskillende temperatuursones binne houers wat pruime teen dubbeltemperatuur verskeep te identifiseer. Tweedens, om die onderliggende prosesse wat die temperatuursones van mekaar onderskei te verstaan, en derdens om die effek van die houer se werkverrigting op vrugkwaliteit te bepaal. Drie prosesse is geïdentifiseer as belangrike eienskappe van pulptemperatuur datastelle aangeteken gedurende dubbeltemperatuurverskeping, naamlik afkoeling, opwarming en oorverhitting wat binne die houer plaasvind. Die volgorde van belangrikheid het gevarieer afhangende van die kultivar verskeep en die houer se werkverrigting. Drie temperatuursones is geïdentifiseer binne integrale houers wat pruime teen dubbeltemperatuur verskeep, waar die gemiddelde pulptemperatuur, die opwarmingstyd en die afkoelingstyd vir elke temperatuursone in die lengte, oor die wydte van links na regs en van onder na bo in die houersisteem toegeneem het. Die variërende temperatuur toestande kan moontlik toegeskryf word aan ‘n variasie in leweringstemperatuur, swak lugvloei en die effek van toenemende respirasie, en dus die produksie van hitte vrygestel deur die vrugte. Die afkoelingsproses is geïdentifiseer as die belangrikste proses wat die temperatuursones van mekaar onderskei. Behalwe in die geval van ‘Fortune, het variërende temperatuurtoestande in integrale houers wat pruime teen dubbeltemperatuur verskeep ‘n betekenisvolle invloed op die vrugfermheid na verskeping gehad, waar vrugveroudering toegeneem het van voor in die houer na die deur van die houer as gevolg van ‘n toename in pulptemperatuur. Daar is egter bewys dat die vrugfermheid voor verskeping ook ‘n bepalende effek kon hê op die fermheidsverskille. Dit kon nie bewys word dat die variërende temperatuurtoestande betekenisvol hoër vlakke van interne defekte binne die integrale houer veroorsaak het nie. Temperatuursones kon nie geïdentifiseer word binne verkoelde integrale houers wat pruime teen enkeltemperatuur verskeep het nie, wat dus impliseer dat die houers daartoe instaat is om temperatuur goed te onderhou binne die houer. ‘n Konstante 2°C opbergingstemperatuur kan moontlik die kommersiële dubbeltemperatuurregime vervang in die geval van ‘Pioneer’ pruime as gevolg van verbeterde vrugfermheid, soortgelyke kleurontwikkeling as die dubbeltemperatuurregime en minder hitte geproduseer binne die houer deur die pruime, wat ‘n meer stabiele houeromgewing veroorsaak. Onaanvaarbare hoë vlakke van verrimpeling en interne verbruining is egter gevind.
Di, Giovanni Bianca. "Lost & Found Videothek Non-Ubiquitous Video Library for Serendipitous Retrieval of Movies. A Design Exploration for the Introduction of Folksonomy in the Physical Space." Thesis, Malmö högskola, Fakulteten för kultur och samhälle (KS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-21373.
Full textD'Ans, Pierre. "Contribution à la mise au point d'une démarche rationnelle de sélection des traitements de surface: illustration dans le cas des dispositifs de fonderie de l'aluminium." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210366.
Full text- Utiliser des multitraitements de surface peut se faire en scindant les différentes requêtes en sous-ensembles, de manière à ce que chaque traitement réponde à l’un d’eux. Dans quel ordre ces requêtes doivent-elles être introduites par rapport au substrat ?
- Comment sélectionner les traitements de surface répondant à chaque requête individuelle ?
- Comment classer des multitraitements en termes d’adéquation au problème posé ?
Dans ce travail, les première et troisième questions sont abordées, en explorant les requêtes concernant habituellement les dispositifs de moulage de l’aluminium :
- Résistance aux contraintes d’origine thermique.
- Résistance à la corrosion par les métaux fondus.
- Résistance au frottement.
L’analyse de la bibliographie relative aux traitements de surface utilisés dans ces systèmes a été analysée et des « architectures »-types ont été identifiées (chapitre 3). On prévoit, par exemple, un traitement conférant la résistance à la fatigue superficielle, ainsi qu’un revêtement étanche et résistant à l’aluminium fondu. Une barrière thermique est parfois préconisée.
Pour chacune des architectures, des traitements de surface individuels peuvent être sélectionnés. Un « facteur de performance » permettant de classer les solutions par rapport au problème de la fatigue thermique a été construit (chapitre 4) et discuté dans deux situations :
- Lorsqu’un revêtement est présent, et que les contraintes d’origine thermique (différence de dilatation thermique couche-substrat) menacent de le rompre lors de l’immersion dans un milieu corrosif à haute température. Des essais de corrosion dans de l’aluminium fondu ont été réalisés sur un acier revêtu par du nitrure de chrome dopé à l’aluminium, synthétisé par déposition physique en phase vapeur (chapitre 5 – collaboration :Inasmet).
- Lorsque des variations thermiques rapides menacent de rompre le substrat et la (les) couches. Des essais de fatigue thermique ont été réalisés sur de l’acier à outils pour travail à chaud non traité, boruré ou recouvert d’un multitraitements (zircone yttriée / NiCrAlY / boruration / acier). Le revêtement en zircone yttriée a été obtenu par projection par plasma. L’essai de fatigue thermique a été modélisé et le facteur de performance, discuté (chapitre 6).
Au chapitre 7, les architectures-types ont été introduites dans une méthodologie de sélection des multi-traitements de surface, qui a été appliquée dans deux cas :
- Celui des moules de fonderie, devant résister à la fatigue thermique et à la corrosion par l’aluminium fondu. Le facteur de performance a été extrapolé à d’autres situations qu’aux chapitres 5 et 6. Les solutions habituellement proposées pour résoudre ce problème sont retrouvées.
- Celui de deux pièces en acier frottant l’une contre l’autre en présence d’aluminium fondu.
To select surface treatments, one must account for the required functional properties, the substrate features and the solicitations the substrate must endure. Certain combinations of these parameters make it difficult to select a single surface treatment, a reason why several successive treatments are preferred. To select them, one needs to determine:
- How to divide the several requests into groups and how to stack up these groups from the substrate to the outer surface, so that each treatment deals with one specific group of requests/properties.
- How to select individual layers for each group of properties.
- How to rank the multi-treatments in terms of relevance for a given application.
In this work, one tries to answer the first and the third questions, by studying the case of aluminium foundry, in which the industrial devices frequently face the following solicitations:
- Thermal stress (thermal fatigue, thermal expansion mismatch).
- Presence of corrosive molten metal.
- Sliding wear.
In the literature, several “standard” architectures are proposed (chapter 3), like a diffusion layer reducing superficial fatigue plus a corrosion barrier layer. A thermal barrier coating is also sometimes proposed.
For each of these architectures, one can select individual treatments. To rank them, one devised a “performance index” for thermal stress (chap.4), which is discussed for two cases:
- For large differences between layer and substrate thermal expansion coefficients, when both are put into contact with a high temperature corrosive medium, the layer may be damaged. One discusses this case by examining the corrosion caused by molten aluminium for a steel substrate coated by anticorrosive chromium nitride doped with aluminium. The layer is produced by physical vapour deposition (chap. 5 – cooperation: Inasmet).
- Repeated fast surface temperature transients can also damage the substrate and/or the layer by thermal fatigue. One conducted thermal fatigue tests with samples of hot work tool steel, respectively untreated, simply borided and protected by a multilayer. In the last case, top coat is yttria stabilised zirconia, followed by a nickel superalloy and then a borided layer (undercoat). One synthesized the zirconia coating by plasma spray and one modelled the thermal fatigue (chap. 6).
In chap. 7, architectures from chap. 2 are introduced in a multi-treatment selection routine, which is applied in two cases:
- Foundry moulds for molten aluminium, withstanding both thermal fatigue and corrosion. The devised performance index is extrapolated beyond the tests of chap. 5 and 6 to treatments for this industrial application, thereby quantifying their respective merits.
- A foundry device exposed to molten metal and sliding wear.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Fenollosa, Artés Felip. "Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/667421.
Full textLa presente tesis doctoral se ha centrado en el reto de conseguir, mediante Fabricación Aditiva (FA), modelos para ensayo quirúrgico, bajo la premisa que los equipos para obtenerlos tendrían que ser accesibles al ámbito hospitalario. El objetivo es facilitar la extensión del uso de modelos como herramienta de preparación de operaciones quirúrgicas, transformando la práctica médica actual de la misma manera que, en su momento, lo hicieron tecnologías como las que facilitaron el uso de radiografías. El motivo de utilizar FA, en lugar de tecnologías más tradicionales, es su capacidad de materializar de forma directa los datos digitales obtenidos de la anatomía del paciente mediante sistemas de escaneado tridimensional, haciendo posible la obtención de modelos personalizados. Los resultados se centran en la generación de nuevo conocimiento para conseguir equipamientos de impresión 3D multimateriales accesibles que permitan la obtención de modelos miméticos respecto a los tejidos vivos. Para facilitar la buscada extensión de la tecnología, se ha focalizado en las tecnologías de código abierto como la Fabricación por Hilo Fundido (FFF) y similares basadas en líquidos catalizables. Esta investigación se alinea dentro de la actividad de desarrollo de la FA en el CIM UPC, y en este ámbito concreto con la colaboración con el Hospital Sant Joan de Déu de Barcelona (HSJD). El primer bloque de la tesis incluye la descripción del estado del arte, detallando las tecnologías existentes y su aplicación al entorno médico. Se han establecido por primera vez unas bases de caracterización de los tejidos vivos – principalmente blandos – para dar apoyo a la selección de materiales que los puedan mimetizar en un proceso de FA, a efectos de mejorar la experiencia de ensayo de los cirujanos. El carácter rígido de los materiales mayoritariamente usados en impresión 3D los hace poco útiles para simular tumores y otras referencias anatómicas. De forma sucesiva, se tratan parámetros como la densidad, la viscoelasticidad, la caracterización de materiales blandos en la industria, el estudio del módulo elástico de tejidos blandos y vasos, la dureza de los mismos, y requerimientos como la esterilización de los modelos. El segundo bloque empieza explorando la impresión 3D mediante FFF. Se clasifican las variantes del proceso desde el punto de vista de la multimaterialidad, esencial para hacer modelos de ensayo quirúrgico, diferenciando entre soluciones multiboquilla y de mezcla en el cabezal. Se ha incluido el estudio de materiales (filamentos y líquidos) que serían más útiles para mimetizar tejidos blandos. Se constata como en los líquidos, en comparación con los filamentos, la complejidad del trabajo en procesos de FA es más elevada, y se determinan formas de imprimir materiales muy blandos. Para acabar, se exponen seis casos reales de colaboración con el HJSD, una selección de aquellos en los que el doctorando ha intervenido en los últimos años. El origen se encuentra en la dificultad del abordaje de operaciones de resección de tumores infantiles como el neuroblastoma, y en la iniciativa del Dr. Lucas Krauel. Finalmente, el Bloque 3 desarrolla numerosos conceptos (hasta 8), actividad completada a lo largo de los últimos cinco años con el apoyo de los medios del CIM UPC y de la actividad asociada a trabajos finales de estudios de estudiantes de la UPC, llegándose a materializar equipamientos experimentales para validarlos. La investigación amplia y sistemática al respecto hace que se esté más cerca de disponer de una solución de impresión 3D multimaterial de sobremesa. Se determina que la mejor vía de progreso es la de disponer de una pluralidad de cabezales independientes, a fin de capacitar la impresora 3D para integrar diversos conceptos estudiados, materializándose una posible solución. Para cerrar la tesis, se plantea cómo sería un equipamiento de impresión 3D para modelos de ensayo quirúrgico, a fin de servir de base para futuros desarrollos.
Chen, Wen-Hsin, and 陳文鑫. "Strategies of Advanced Technology IC Foundry." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/14122352899836456185.
Full textWang, Hung-Chang, and 王洪昌. "Assessing the Technology Development of the IC Foundry Operations." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/01862687303188741408.
Full text國立交通大學
管理學院碩士在職專班科技管理組
97
IC industry has been identified as one of the most developed high-tech industries in Taiwan. Taiwan’s IC Foundry industry plays as the market leader in terms of IC output which accounts for 70% worldwide market share in 2007, in which TSMC accounts for 50% whereas UMC accounts for 15%. Existing researches on IC Foundry Industry mainly focused the fields of production, marketing, human resources management, finance and process rather than probing into the area of technology development that has been less focus in the past. Given the high capital concentration characteristic of IC Foundry industry, to optimize the capital utilization becomes more and more important for IC Foundry companies. Some subtopics regarding the investment of the technology development resource, allocation of the resource and influence on business performance associated with the technology development activities have been widely discussed as well. This paper studied the technology development to build an IC Foundry Industry Model based on Moore Law and R & D activities structure; it explained the technology development model for the IC Foundry Industry including some perspectives about the Moore Law vs. IC technology development evolution, allocation of the technology development resources, the investment of R & D, achievement of the technology development, and the influence of the economic cycle and industry lifetime. This paper includes a case study of the IC Foundry technology development that explores Moore Law and R & D activities structure by TSMC development track. It emphasizes on a comparison of technology development impacts between IC design houses and IC package/testing houses, followed by the recommendation made for the IC Foundry, IC design companies, and IC package/ testing houses.
Chang, Michael, and 張明勳. "Advanced Semiconductor Foundry Marketing Management:A Case Study of TSMC 90-nm Technology." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/74609378370378029654.
Full text國立交通大學
管理學院高階主管管理碩士學程
93
Semiconductor foundry business play an important role in the semiconductor supply chain since 1990 and will become more important in the future. Foundry business, according to many analysis reports, is one of the highest growth market in the whole semiconductor industry. The dis-integration of semiconductor supply chain was due to the foundation of TSMC in 1987. It also changed the situation from a single flow: design, manufacture, and sales to individual steps. TSMC is the world largest semiconductor foundry company now. The advantage of semiconductor foundry is because of cost and efficiency benefits. As more and more players, both pure play foundry and IDM, joining this semiconductor foundry business, the differentiation besides cost and benefit becomes the key success factor to the company. How do a foundry company differentiate with others? And to make profit. This study is to discuss the semiconductor foundry marketing strategy for advanced technology through a case study of TSMC 90-nm technology and interview with experts in semiconductor industry. A new approach for semiconductor foundry business was found for other companies to leverage. On the other side, it is also a good reference to other industries. Through this marketing management methodology, TSMC 90-nm market share is growing faster and will dominate the market. In the same time of building a new marketing plan, the organization of company must be modified to fit the whole marketing strategy. In the study, we also compared mature technology marketing strategy vs. advanced technology marketing strategy and SWOT analysis of different semiconductor companies. At last, we conclude a new product/marketing expansion approach for semiconductor foundry industry and summarize the strategies for different market segment by share of market.
Lee, Feng-Ning, and 李鳳寧. "Using Technology Forecasting Methodologies to Analyze the Equipment Requirements for GaAs Foundry Manufacturer." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/47568974408372871471.
Full text國立交通大學
科技管理所
90
In the past two years, GaAs foundry FAB tried hard to benchmark the successful Silicon Foundry Industry model to establish the GaAs Foundry business in Taiwan. As the natural material of compound GaAs is quite different from Silicon, Foundry businesses for GaAs and Silicon are supposed to be developed differently in many ways. We all concerned whether the GaAs foundry can totally adopt the evolution paragon of Silicon Foundry. This research takes the Scenario Forecasting Technology (SRI), follows the equipment management indices of Silicon Foundry, Overall Equipment Effectiveness (OEE), to analyze the request to a tool vendor as a manufacturing production player of GaAs Foundry FAB. Based on the result of the research, the short-term, medium-term and long-term target and requirement criteria are set for an equipment vendor. In the short-term, tool vendor should be one of the members in the OEE team of the Foundry player to develop the specification for the production equipment. In the medium-term, since the Foundry FAB is supposed to be in mass production period, tool vendor should leverage its resource to support the improvement of MTTR (Mean Time to Repair) and MTBF (Mean Time between Failure) for the Foundry FAB. In the long run, tool vendor should develop the next-generation equipment that can match the specification of a Foundry FAB exactly.
Fragoso, Bruno Filipe Marques. "Improving the characteristics of foundry alloys AlSiCuMg during manufacturing." Tese, 2013. https://repositorio-aberto.up.pt/handle/10216/69514.
Full textFragoso, Bruno Filipe Marques. "Improving the characteristics of foundry alloys AlSiCuMg during manufacturing." Doctoral thesis, 2013. https://repositorio-aberto.up.pt/handle/10216/69514.
Full textLiu, Hsuan-Hsuan, and 劉萱萱. "The Relationship between Technology-Life-Cycle and R&D/ Manufacturing Strategies in Wafer-Foundry Industry." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/76363237332731389506.
Full text吳宜勳. "An Integrated Methodology for New Customized Manufacturing Process Technology Development - A Case Study of the Foundry Fabrication." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/54733291373101934801.
Full text國立清華大學
工業工程與工程管理學系
94
The foundry business model has created a paradigm shift in the semiconductor industry. The model not only accelerates the dis-integration trend in semiconductor industry, but also provides billions of foundry business benefits. In the next decade, the semiconductor foundry will play an even more important role in the semiconductor business because of the continuous raise of the core competition. The core competition indicates the development of customization technology, the advanced and flexible production technology, and the customer oriented service system. The key goal for the semiconductor foundry is to help customers efficiently achieve their new products time-to-market. Based on the system engineering perspective, this thesis aims to develop an integrated management method on the process of new customized technology development. The thesis utilizes the project management, the concurrent engineering, and the quality function deployment to construct a management model of the foundry business. The model plans to shorten the time, decrease the mistakes and lower the cost when the new technology process is adopted. A case study of a specific factory is exemplified to test and demonstrate the management model.
賴昭宇. "A Fuzzy Integral Based FMCDM Framework for Semiconductor Foundry Strategy Definitions at Various Stages of a Technology Life Cycle." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/23866268229858339699.
Full text國立臺灣師範大學
工業教育學系
98
Semiconductor foundry manipulation is one of the most important core-competences of fabless IC design houses’. However, due to the different characteristics of semiconductor manufacturing technologies at various stages of a technology life cycle (TLC) of some specific generation of process technology (e.g. 90nm, 65nm, etc.), satisfying different needs at each stage of a TLC under the premise that firms’ profitability can keep growing, choosing appropriate foundries has become daily critical for a fabless IC design house’s final success of innovation. In different stages of a TLC, firms have various advantages to maintain the maximum profit while assuring quality as well as on time delivery of foundry products. Albeit important, very few researches discussed how appropriate foundries can be determined. Most studies focused on the TLC only or focused on how profitable partnerships can be established. To define appropriate foundry strategies of fabless IC design houses’ to resolve the above mentioned problem which is usually faced by fabless IC design houses, this research aims to develop a fuzzy integral based fuzzy multiple criteria decision making (FMCDM) framework. Considering the characteristic of inter-dependences between criteria, a non-additive fuzzy integral based FMCDM model with ISM will be proposed for assisting decisions' makers in evaluating the most appropriate foundry strategies. Criteria for evaluating the foundry strategies at various stages of a TLC will first be summarized by literature and then be derived by using the modified Delphi process. Then, the ISM will be leveraged for deriving the decision problem structure. The Fuzzy Analytic Hierarchical Process will be leveraged for deriving weights versus each criterion. And the non-additive fuzzy integral will be leveraged to aggregate the performance value versus each alternative. Finally, foundry strategy portfolios clarify by cluster analysis method from the performance derived from fuzzy integral. An empirical study based on evaluating Taiwanese semiconductor experts will be leveraged to demonstrate the feasibility of the proposed MCDM framework. Criteria for evaluating and selecting foundries over a TLC will be derived. Further, the empirical study results can be leveraged by fabless design houses.
Wei, Hung-Ju, and 魏宏儒. "60-GHz Dual-Conversion Transceiver in 0.18-μm Foundry CMOS Technology Using Schottky Diode and Distortionless Microwave Passive Components." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/93236603954166223079.
Full text國立交通大學
電信工程研究所
99
Recently, most 60-GHz transceivers have been demonstrated using advanced CMOS technologies, such as 90 nm, 65 nm and 45 nm. Low noise amplifier (LNA) and power amplifiers (PA) are the key components in resisting the high 60-GHz path loss caused by oxygen attenuation. Limited by the maximum breakdown voltage and minimum noise figure (NFmin) of CMOS devices, 60-GHz CMOS PAs possess small output power and low power-added efficiency (PAE) while 60-GHz CMOS LNAs have no significant improvement in noise figure even with advanced CMOS technologies. This impairs the development of 60-GHz portable equipment. Compared with CMOS technologies, III-V GaAs-based technologies inherently have a superior noise figure with low DC power consumption and large linear output power with high PAE. Thus, this dissertation proposes an alternative approach to a 60-GHz transceiver, in which the LNA/PA are realized using III-V GaAs-based technology and the other circuits of the 60-GHz front-end are fully implemented using low-cost 0.18-μm CMOS foundry technology. The latter has been successfully demonstrated in our work. The low photolithography cost of the 0.18-μm CMOS process allows iterations to solve the problem of inaccurate device modeling, greatly reducing the costs in the R&D phase. Two key components of the 60-GHz 0.18-μm CMOS dual-conversion transceiver are the introductions of a Schottky diode and a distortionless microwave passive component. The Schottky diode, with its high cut-off frequency, promotes the speed of the 0.18-μm CMOS technology beyond fT of an MOS device, while its low turn-on voltage alleviates the difficulty of millimeter-wave LO generation with 0.18-μm CMOS technology. Distortionless transmission theory for miniaturization is developed in the passive component design. Size shrinkage by the effective dielectric constant is still preserved even if the attenuation constant coexists. When implementing a microwave component directly on silicon substrate, high silicon dielectric constant is of great benefit in size shrinkage. Although the effect of lossy silicon substrate is induced, step-impedance and lump-distributed techniques are employed in this work to effectively reduce transmission-line length for small silicon-substrate and metal loss. Here, a phase-inverter rat-race coupler with excellent amplitude/phase balance is the main object of study. Incorporating the step-impedance technique with the Chebyshev response, compact size and wide bandwidth can be simultaneously attained in the phase-inverter rat-race coupler. Finally, different kinds of high-speed frequency dividers, such as super-dynamic and regenerative structures, are introduced and discussed.
Wen, Mao-Ping, and 文茂平. "Decision Models for Information Technology Outsourcing For the Semiconductor Industry–Taking a Taiwan''''s Wafer Foundry Company as an Example." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/69508874983096741314.
Full text國立交通大學
管理科學學程碩士班
89
The introduction of information system (IS) to an enterprise is a very important digitalizing stage in the semiconductor industries. In these years, the outsourcing is one of the major trends introducing IS. The IS outsourcing is to leverage the information technology (IT) to improve the performance as well enhancement of competence. The study is to explore the case in best decision model of IT outsourcing and take an example of Taiwan wafer foundries. The IT outsourcing has become a very important management issue that is subject to the concept of specialization, insufficient resources and strategic focuses. In the process of IT outsourcing, the motivation of the study is to search how to select the best decision model, bringing the maximum profit for enterprise by using IT. The major conclusions are: 1.「Lacity modelⅠ」and「Lacity modelⅡ」are the best decision models: The result of this research indicates「Lacity modelⅠ」 is the best decision model. The project of purchasing focus is resulting style the key to decide the project outsourcing or not. If we revise the unfit outsourcing projects,「Lacity modelⅡ」is the best decision model. The contribution of IT activity to business positioning is as commodity which is the key point for projects fit for an outsourcing. 2. EDW, CIS, ERP, and CRM projects fit outsourcing: EDW, CIS, ERP, and CRM projects fit almost all models'''' requests. And ATP, RCP, and PDM projects unfit outsourcing. The three projects are unfit three or four models'''' requests. PDM project is unfit outsourcing because it’s purchasing focus is result style. So it fits outsourcing. ATP and RCP projects are unfit outsourcing and they are decision mistakes as we know from interview. 3. Important decision variables for IT outsourcing: We also conclude some important decision variables for IT outsourcing. The project which the purchasing focus is the result style, the contribution of IT activities to business positioning is commodity, the level of internalization of human resource is low, competitors'''' process technology positions is better, the degree of current dependence on information is low, the degree of important of sustained, innovative information resource development is low, and the degree of technology control is high fits outsourcing.
Wang, Chi-Yu, and 王紀猷. "The Analysis of Key Indicators and Competition Performance of Growing Technology Industry in Taiwan – Using Foundry, TFT-LCD, LED and Analog IC Design Industries as examples." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/17814351081696719510.
Full text國立臺北大學
企業管理學系
98
High technology represents dominant industry in Taiwan. New successfully developed industry will produce huge profit and opportunity. If we can find some indicators to evaluate the efficiency of new developed industry, we can thus judge the rapid growing of that industry. This is a good research topic of value. Traditionally, the research of Taiwan’s industry about key performance indicators(KPI) is mostly based on individual company, i.e related financial and operating development indicators. It is not often to compare the indicators of all the companies or extra-companies in the same industry field. This research focus attention on individual industry to anylyze successful examples of high technology companies in Taiwan and then to study its key successful factor. Finally, we acquire the general key performance indicator, of growing high technology industry in Taiwan. As far as the evaluating perspectives, we consider the unique high technology and its supply chain system to evaluate five efficiency perspectives literature references , i.e. core technology, supply chain, industry, market and business operating. During the historical development of Taiwan’s high technology industry we select four representative rapid-growing industries in past decades to do researches, i.e. foundry, LED, TFT-LCD and analog IC design. core competing technology All the above four industry cases possess complete supply chain and step ahead firmly.. They lead theirown industry by owning core competing technology.We infer that industry in Taiwan is belong to growing high technology as long as its KPIs satisfy the following four conditions (1) with core technology (2)with complete supply chain (3) with more than 15% annual growing rate on that industry (4)with Taiwan’s growing rate more than world’s growing rate.
Findeisen, Sebastian. "Zykluszeitreduzierung beim Druckgießen durch mehrteiligen Werkzeugaufbau." Doctoral thesis, 2014. https://tubaf.qucosa.de/id/qucosa%3A22968.
Full textLiu, Cheng-Lu, and 劉政旅. "New Startup Company Risk Assessment and Operating Procedures: A case of Company E Founded by Human Interface Technology." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/cxnpmd.
Full text國立交通大學
管理學院高階主管管理碩士學程
106
There are various types of backgrounds for the founding of a startup company. This research case is mainly for the category of technological entrepreneurship. There are five types of technological entrepreneurship that we are aware of: business transfer, investment transfer, professional startup, and independent Pioneering entrepreneurs and vanguard pioneers, technological entrepreneurial success has several important elements, technology maturity, product market acceptance, technical teams, funds, and complete upstream and downstream product supply chains. This case illustrates the technical team's impact on the team in the event of corporate organizational change or business mergers and acquisitions. For the members of the technical team to respond, whether to seek technical entrepreneurship, to propose a set of assessment mechanisms, and possible risks. And feasibility assessment of successful business ventures. The case of company E in this paper was created by the process of evolution of the company's parcel technical team and sales to competitors. The feasibility analysis of technology entrepreneurship from the industrial environment, market distribution, technology and law, and team composition Facets, etc., have a favorable and unfavorable influence on technology entrepreneurship. According to the influence of these key factors. Then analyze the impact of the industrial environment in which new technology start-up companies are located on the entrepreneurial process. Based on theoretical evidence and practical case studies, this research summarizes the core competencies that start-up companies should have and the value activities that they match. These value activities can be summarized as product/technology development, entrepreneurial team interaction, board composition and Five major aspects such as shareholder structure, financial management and financial estimation. Finally, based on empirical research and perspectives, this study will be a practical research of new technology startups and possible simulations and risk assessments, and will be a complete research paper. It hopes to provide references for entrepreneurs with relevant experiences.
SUN, CHUAN-JEN, and 孫傳仁. "A Study on the Campus Planning Process of Taiwan's National Universities of Science and Technology Founded in the 1990s." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/c7zt2k.
Full text國立雲林科技大學
設計學研究所
108
For a university, the initial stage of starting the university is a very special campus development stage. It aims to build up the framework for a university campus to keep growing and provide a basis for a favorable development. As the 1990s is the beginning of the expansion of higher technological and vocational education and the application of campus planning to the development of managing university campus, the study focuses on the overall campus planning process of the two newly-established national universities of technology in the 1990s and examine the relationship between the two contexts of the higher technological and vocational educational development and the campus planning of the newly-established universities of technology. The study will also analyze the process, influence, and historical meaning in terms of the educational concept transformation, campus planning and implementation context for the observation and reflection on the transformation process of the higher technological and vocational school campuses in Taiwan. Based on the perspective of hermeneutic phenomenology, the study adopts the multiple case study to conduct the topic research. Besides combining the research methods of document and file analysis and direct observation, the semi-structured in-depth interviews are conducted on the major preparation and executive team members of the two universities of technology for the experience recollection and interpretation of oral history. The thematic analysis is also conducted to do the textual analysis of the case study. According to the research purposes and issues and literature review, the study analyzes the cases and proposes the following six concluding points: I. The development trend of “globalization” and “knowledge-based economy” caused the sharp transformation of the industrial structure in Taiwan in the 1980s. It is the major reason why the vocational education developed and expanded into higher education in the 1990s. II. “Interdisciplinary integration” becomes the core concept in the higher technological and vocational educational development and the campus planning of the universities of technology. A comprehensive consideration is taken in terms of the integration between subjects, between subject groups, and between subject groups and campus. III. The forming of the “subject groups” is different from the teaching organization in general universities. The space organization of “subject groups” also evidently composes the major framework of the campus space in the campus planning of the universities of technology and affects the image shaping of the vocational school campuses. IV. The concept of the higher technological and vocational education in Taiwan embodied in the campus planning principle should have five characteristics: 1. Integration; 2. Flexibility; 3. Centralization; 4. Humanization; 5. Sustainability. V. Four characteristics of the campus design of the University of Science and Technology. VI. Ten Propositions of "Science and Technology University's Early Campus Planning Concept and Spatial Pattern Development"
Ganem, Muller Maria G. M. "Found Footage, mouvement cinématographique contemporain." Thèse, 2012. http://hdl.handle.net/1866/9040.
Full textThis research deals with the found footage, analyzed here as a practice of cultural recycling and as a major cinematographic movement of our time. The study first draws a parallel between the manufacturing of "found images" and the process of industrial recycling. The thesis then discusses the artistic influences of the experimental film movement initiated in the 1960s, which has been increasing its presence more and more since the introduction of the latest digital technologies. Finally, the study proposes an investigation of found footage in relation to the digital technology era, analyzing the causes and consequences of the [re]rise of the movement, and taking into account the multiplication of its format on the Internet through the practice of mashup.
Nadais, João Filipe Vieira. "Hooray, I found the bug." Dissertação, 2016. https://repositorio-aberto.up.pt/handle/10216/85732.
Full textDebugging has been a process that is causing various headaches to a large of programmers along time.Sometimes, the error is found at a very late stage of development, leading to added high costs for its correction. Other times, a function is not contemplating all the cases it should, specially some that are not easily perceptible, which lead to an indication by debugging tools that the fault is on related parts, since this function is seen as executed successfully. Some tools like Crowbar give us, from a set of tests, the possibility of having a more visual perception of the project that is being analyzed, as well as the probability of finding the error in certain parts of the code. Having its base on algorithms that strive for efficiency, such as Spectrum-based fault localization, and being integrated in the IDE, the user has the possibility of having a new approach to the fault localization problem. However, so far it is still not possible to state the real impact that having this kind of tool in the general user experience. Therefore, a user study was done to compare not only the fact of having or not a performance improvement by the users on locating faults, but also the importance of having this tool integrated in the IDE, the ease of use of the tool and finally obstacles that the user had due to the need of using a specific IDE. For those who will test the opposite case (the usual process with no tool), we aim to evaluate the approach used by the developer to find the error as well as the difficulty on finding it. By comparing these two experiences, with a relevant number of cases in each, it will be possible to conclude wether or not tools like Crowbar make users better.