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Affaticati, P. E. "Engineering transketolase for industrial biotechnology". Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/1557943/.
Pełny tekst źródłaPask, Frederick. "Systematic engineering of industrial ovens". Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/813216/.
Pełny tekst źródłaLindved, Erik, i Jakob Rolén. "Cost Engineering Strategies for Industrial Sourcing". Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264049.
Pełny tekst źródłaHantverket att uppskatta och hantera kostnader är vanligtvis benämnt kostnadsestimeringsteknik vilket är ett viktigt verktyg för att motverka kostnadsosäkerhet. Befintlig forskning inom området behandlar i huvudsak teknikerna för kostnadsestimering i sig och de strategiska implikationerna har varken utretts på djupet eller satts i relation till traditionella inköpsstrategier. Denna studie undersöker hur kostnadsestimeringsteknik ska användas strategiskt inom industriellt inköp. Forskningen är bedriven som en fallstudie i tre delar på ett tillverkande företag och innehåller en kvalitativ del bestående av en litteraturstudie, en intervjustudie samt en analys av artefakter. Detta kompletteras med en kvantitativ statistisk analys innehållande en multipel linjär regressionanalys samt ett Welch-ANOVA-test. Resultaten från denna studie inkluderar en lista med inköpsfaktorer som påverkar kostnadsosäkerhet och ett fastställande av deras påverkan. Detta kompletteras med insikter angående hur användandet av kostnadsestimeringar påverkar förhandlingssituationer och leverantörsrelationer. Som en del av studiens diskussion presenteras ett strategiskt ramverk för hur man bör fokuera arbetet med kostnadsestimeringsteknik under de olika faserna i produktlivscykeln. Den föreslagna strategin involverar förslag på hur kostnadsestimeringsteknik bör användas, vilken typ av komponenter insatserna bör fokusera på samt vilka förutsättningar som måste finnas på plats. Studien visar att interorganisationellt delande av kostnadsdata, leverantörsrelationer, förändring i inköpsvolym och fas i produktlivscykeln är centrala faktorer som påverkar hur resurser för kostnadsestimeringsteknik ska fördelas.
Mazzuto, Giovanni. "Fuzzy Cognitive Maps tools for Industrial Engineering". Doctoral thesis, Università Politecnica delle Marche, 2014. http://hdl.handle.net/11566/242871.
Pełny tekst źródłaThe proposed thesis highlighted the potential of cognitive maps in their explanatory and reflective functions and their value in support of decision making within organizations in a phase of any consolidation of the cognitive distances involved. Intelligent agents use mental models and have various “internal” processes (physical, mental, emotional) as they interact with other agents. Encourage group members to produce their own learning and cognitive maps represent their mental models that can have multiple functions in the formation, whether or not assisted by the network. The considered areas of study are characterized by complexity requiring the investigation of new advanced methods for modelling and development of sophisticated systems. In order to improve the communication between the different actors in relation to the factors, it becomes important to recognize that the mental models that characterize them influence the way they perceive the world and, consequently, the risks. The information collected through this analysis have been used both as a basis for the definition of strategies of risk communication, and as a guide for the negotiation process aimed at reducing existing levels of conflict and, at improving the mitigation measures to be taken. On the basis of the results obtained, it becomes important to encourage administrators to increase the dissemination of information about previous responsibilities relating to risk management, and the future ones relating to possible measures to be undertaken in a specific area. The proposed PhD thesis analyses some cases of study. It has been described the application of the FCM in the suppliers' selection sector, specifically, in the new product development process; in the analysis of injury events on workplace, where the social aspect has a great relevance; it has been analysed in order to define a new ranking method, in an Italian company, for defining a criticality indicator for the equipment and a proper maintenance program and, finally, the FCM has been applied in the Healthcare sector and, specifically, it has been used to define the main causes affecting the drug administration risk.
Legner, Samuel, i Joel Ringbom. "Improving the Conventional Industrial WheelbarrowConventional Industrial Wheelbarrow". Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-20108.
Pełny tekst źródłaZhang, Xiao Qi. "Value optimization for engineering tasks". Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107913.
Pełny tekst źródłaLa concurrence importante entraîne la mise en place des valeurs 'Lean' dans de nombreuses industries. L'identification de la valeur et la livraison du produit sont difficiles à cause des diverses soucis des parties prenantes, le nombre important des tâches distribuées et le processus complexe d'allocation des ressources. L'objectif global de cette recherche est de développer un processus d'optimisation basé sur le concept de valeur. Cela se fait en adoptant une perspective d'entreprise qui s'investit sur l'identification de valeur, l'aide à la décision et l'allocation des ressources.Tout d'abord, un modèle multi-attribut est proposé afin de définir la valeur comme étant un concept qui couvre tous les aspects importants des objectifs de décision. Puis, une méthode d'aide à la décision est développée à l'aide d'un grand nombre de décideurs pour déterminer la valeur d'une manière efficace et égalitaire. Enfin, la valeur définie est incorporée dans une procédure d'allocation des ressources, pour optimiser la valeur telle que réalisée à partir des ressources limitées. La recherche a été validée à travers une implémentation dans une entreprise aérospatiale.
Hensel-Unger, Ralph. "Entwicklung einer Gestaltungssystematik für das Industrial Engineering (IE)". Doctoral thesis, Universitätsbibliothek Chemnitz, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-73876.
Pełny tekst źródłaTo cope with tough international competition, companies are faced with the demand for highly efficient and productive manufacturing as well as service processes and the need to identify potential for rationalization in order to ensure the economic performance of the company. Industrial Engineering is playing a key role in planning and optimizing work systems and processes in ergonomic as well as economical terms to improve enterprise's productivity. Currently there is no common understanding of IE, of its specific functions as well as its organizational fixture in enterprise's praxis. Because of this lack between research and practice, enterprises waste the potential of IE for the increase in productivity. To overcome the problem of a missing holistic approach for the continuous productivity management, a systematic approach for the full potential utilization of IE will be introduced. This firstly facilitates the institutional configuration of a human-oriented IE in enterprises of the manufacturing and the service sector and secondly helps to realize measures of work design as well as work rationalization by means of a strong change management. Thus, the developed design approach systematically contains dimensions and parameters for the implementation of an overall Industrial Engineering enabling to unleash productivity potentials by considering the technology as well as the human factor and organizational conditions. Furthermore, for the first time the intercultural differences influencing the Industrial Engineering on the functional, structural and personnel level are explicitly considered in the novel approach. From a practice-oriented point of view, the approach helps to give concrete recommendations for the implementation of the Industrial Engineering as well as for the job of the Industrial Engineers being sent as expatriates to Poland or the Czech Republic
Wiberg, Anders. "Industrial design engineering study of PCM power plant". Thesis, KTH, Maskinkonstruktion (Inst.), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99317.
Pełny tekst źródłaA study has been made of a smaller power station on behalf of Exencotech who is researching energy-recycling possibilities. Their station extracts energy from heated water which otherwise would have been discarded as a loss. The study has been conducted on a 100kW system with a high option of modularity which makes the system flexible and adjustable when installing. The study also treats a 5kW prototype and a modular version of the 100kW system up to 0,5MW. The application is designed to minimze the volume and weight of the system. It has also been analyzed ergonomically and in ways of its usability which has affected the design. To define appropriate solutions for the project several concepts has been conducted as well as evaluations of solutions. As a prestudy for the project other power stations has been looked at as well as control and surveillance systems. A concept has been developed where the energy cell module (the module extracting energy) is designed to give 50kW (initially, though optimization will heighten this), using 9m3 volume, this is used together with a water distribution module and a hydraulic module. As maintenance is meant to be easily performed, a special application has been developed which helps the procedure of access and extraction of desired parts whitout causing the operator too large ergonomical stress. The system is designed to be able to operate even when a part of it is shut down for repairs. The module has been constructed and dimensioned to withold the loads it would cause into the system. A graphic interface has also been designed to improve the usability and understanding of the system.
Dimitriv, D., B. S. Deez i A. E. Sonn. "Reverse engineering in industrial applications. A comparative study". Journal for New Generation Sciences, Vol 7, Issue 3: Central University of Technology, Free State, Bloemfontein, 2009. http://hdl.handle.net/11462/539.
Pełny tekst źródłaThe development of innovative products and their realisation by means of advanced manufacturing methods and process combinations is more becoming a key issue in international competitiveness. The industrial production is subsequently influenced ever more by the possibilities that Rapid Technologies -Rapid Modelling and Reverse Engineering, Rapid Prototyping and Tooling, Rapid Manufacturing can offer. Reverse Engineering (RE) is the process of digitising a physical object to obtain computerised data for further development as opposed to manufacturing a product from a digital model, e.g. CNC machining. This paper reflects experiences gained in the use of RE approaches for industrial applications, comparing specifically the use of tactile methods and digitising techniques based on photogrammetry principles. Process capabilities and the internal process chain are scrutinised. Practical case studies are presented and discussed with an emphasis on project lead times and dimensional accuracy obtained. Particular attention is paid to challenges related to surface recreation and manufacture of tooling for various components. The purpose of the paper is therefore to highlight the capabilities and wide range of applications for Reverse Engineering, while at the same time outlining pitfalls and limitations of this remarkable technology.
Eigner, Martin. "Das Industrial Internet – Engineering Prozesse und IT-Lösungen". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-214588.
Pełny tekst źródłaMorgan, Heather Dawn. "Industrial case study-driven innovative optimised engineering design". Thesis, Swansea University, 2015. https://cronfa.swan.ac.uk/Record/cronfa42659.
Pełny tekst źródłaBjelkemyr, Marcus. "System of Systems Characteristics in Production System Engineering". Doctoral thesis, Stockholm : Skolan för industriell teknik och management, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10617.
Pełny tekst źródłaGorschek, Tony. "Software Process Assessment & Improvement in Industrial Requirements Engineering". Licentiate thesis, Ronneby : School of Engineering, Department of Systems and Software Engineering, Blekinge Institute of Technology, 2004. http://www.bth.se/fou/Forskinfo.nsf/allfirst2/d99bfd9efd34ee37c1256fac0038d53b?OpenDocument.
Pełny tekst źródłaPhadke, Atul Arvind. "Introduction of programmable logic controller in industrial engineering curriculum". Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10318.
Pełny tekst źródłaTitle from document title page. Document formatted into pages; contains xi, 102 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 77-79). WVU users: Also available in print for a fee.
CRISTOFARO, ANDREA. "Some Constrained Control Problems with Applications in Industrial Engineering". Doctoral thesis, Università degli Studi di Camerino, 2010. http://hdl.handle.net/11581/401924.
Pełny tekst źródłaRONDINI, ALICE. "Engineering and assessing Industrial Product-Service System (IPSS) solutions". Doctoral thesis, Università degli studi di Pavia, 2018. http://hdl.handle.net/11571/1227775.
Pełny tekst źródłaMac, Garrigle Ellen F. "A validation of the enterprise management engineering approach to knowledge management systems engineering". Thesis, The George Washington University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3614805.
Pełny tekst źródłaKnowledge management is one of the current "buzzwords" gaining popularity on an almost-daily basis within the business world. Much attention has been paid to the theory and justification of knowledge management (KM) as an effective business and organizational practice. However, much less attention has been paid to the more specific issues of effective implementation of knowledge management, or to the potential financial benefit or payoff that could potentially result from an effective system implementation. As the concept of KM becomes more generally accepted, knowledge management systems (KMS) are becoming more prevalent. A KMS is often considered simply another information system to be designed, built, and supported by the IT department. In actual implementation, many KM system development efforts are not successful. There is frequently a perception that strict adherence to development processes produces an excessive time lag, rigor, and formality which will "disrupt" the desired free flow of knowledge. Professor Michael Stankosky of GWU has posited a more flexible variation of the usual systems engineering (SE) approach, tailored specifically to the KM domain and known as Enterprise Management Engineering© (EME). This approach takes the four major pillars of KM as identified by GWU research in this area—Leadership, Organization, Technology, and Learning—and adapts eighteen key SE steps to accommodate the more flexible and imprecise nature of "knowledge".
Anecdotal study of successful KMS developments has shown that many of the more formal processes imposed by systems engineering (such as defining strategic objectives before beginning system development) serve a useful purpose. Consequently, an integrated systems engineering process tailored specifically to the KM domain should lead to more successful implementations of KM systems. If this is so, organizations that have followed some or all of the steps in this process will have designed and deployed more "successful" KMS than those organizations that have not done so. To support and refine this approach, a survey was developed to determine the usage of the 18 steps identified in EME. These results were then analyzed against a objective financial measurement of organizational KM to determine whether a correlation exists. This study is intended to test the validity of the efficacy of the EME approach to KM implementation.
For the financial measurement data, the subject list of organizations for this study used a measure of intangible valuation developed by Professor Baruch Lev of NYU called Knowledge Capital Earnings © (KCE). This is the amount of earnings that a company with good "knowledge" has left over once its earnings based on tangible financial and physical assets have been subtracted from overall earnings. KCE can then be used to determine the Knowledge Capital (KC) of an organization. This in turn provides two quantitative measures (one relative, one absolute) that can be used to define a successful knowledge company.
For this study, Lev's research from 2001 was updated, using more recent financial data. Several of these organizations completed a survey instrument based upon the 18 points of the EME approach. The results for the 18 steps were compared against each other and against each organization's KC scores. The results show that there is a significant correlation between EME and the relative KC measurement, and select EME steps do correlate significantly with a high KC value. Although this study, being the first validation effort, does not show provable causation, it does demonstrate a quantifiable correlation and association between EME and successful KM implementation. This in turn should contribute to the slim body of objective knowledge on the design, deployment, and measurement of KM systems.
Brusoni, Stefano. "The division of labour and the division of knowledge : the organisation of engineering design in the chemical industry". Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340829.
Pełny tekst źródłaOltikar, Akhil Manohar. "Computer-Aided Engineering of Plywood Upholstered Furniture Frames". NCSU, 2001. http://www.lib.ncsu.edu/theses/available/etd-20001221-130641.
Pełny tekst źródłaUntil the early 1900s, furniture was built by hand, one piece at a time. The industrial revolution and modern manufacturing technology has changed all of that. Today, as the furniture industry moves firmly into the next century, computerized systems and automated manufacturing have become more common to the industry. This thesis represents an effort to analyze the current practices in computer-aided design of upholstered furniture, specifically plywood frame furniture, and to develop new procedures for reducing the lead-time in upholstery product development. Different 3-D modeling techniques for designing plywood furniture frames and their features have been developed and implemented. A plywood frame feature library has been created, and geometric relations needed to fully constrain each feature type have been developed. This reduces modeling time and also increases consistency in the solid models. A new reverse engineering procedure, using an articulating arm, has been proposed, implemented, and tested for 3-D digitization of plywood frames. The proposed methodology eliminates some of the traditional processes currently followed in the industry, thus making the product development faster and more streamlined. Further, an algorithm has been developed, implemented and tested for automatically mirroring plywood upholstery frame assemblies in a CAD system. The algorithm considerably reduces the modeling lead-time in the product development process. Finally, some future work that considers currently available 3-D CAD technologies has been recommended which would help close the gap between upholstery designers and manufacturers.
Wagner, Thomas. "Agentenunterstütztes Engineering von Automatisierungsanlagen". [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-35254.
Pełny tekst źródłaPanokarren, Clifford L. "Information model for engineering change management". FIU Digital Commons, 2004. https://digitalcommons.fiu.edu/etd/3949.
Pełny tekst źródłaKyle, Stephen Alexander. "Triangulation methods in engineering measurement". Thesis, University College London (University of London), 1988. http://discovery.ucl.ac.uk/1318061/.
Pełny tekst źródłaMay, John Hendy Robert. "Knowledge-based systems in engineering safety". Thesis, University of Bristol, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327937.
Pełny tekst źródłaTran, Cong Thanh. "Network learning in global engineering services". Thesis, University of Birmingham, 2019. http://etheses.bham.ac.uk//id/eprint/8877/.
Pełny tekst źródłaRantanen, E. (Eetu). "Requirements engineering in agile software projects". Bachelor's thesis, University of Oulu, 2017. http://urn.fi/URN:NBN:fi:oulu-201705091721.
Pełny tekst źródłaMonet ohjelmistoprojektit epäonnistuvat, koska tieto vaatimuksista on riittämätöntä toimituspäätöksiä tehdessä. Lisäksi projektinhallinnan prosessi, johon sisältyy ketterä vaatimustenhallinnan prosessi, on tunnistettu yhdeksi neljästä ketterien ohjelmistoprojektien menestystekijästä. Tämän takia ketterien ohjelmistoprojektien onnistumiseksi on tärkeää, että vaatimusmäärittelylle on selkeät ohjeet. Tämän tutkimuksen tarkoituksena on analysoida ketterää vaatimusmäärittelyä ja löytää siinä yleisesti käytettyjä tapoja. Tavoitteena on määrittää jatkuva prosessi, jossa asiakkaan tarpeet tunnistetaan ja käännetään ohjelmiston vaatimuksiksi ketterässä ohjelmistokehityksessä. Tavoitteeseen pyritään tekemällä systemaattinen kirjallisuuskatsaus ketterään vaatimusmäärittelyyn. Ketterää ohjelmistokehitystä sekä perinteistä vaatimusmäärittelyä käsitellään muutaman perusteoksen pohjalta. Tutkimuksen ylätason tutkimuskysymys on: Kuinka asiakkaan tarpeet käännetään vaatimuksiksi jatkuvana prosessina ketterissä ohjelmistoprojekteissa? Lisäksi tutkimuksella on kaksi alatason tutkimuskysymystä: 1. Mitä asiakkaan tarpeet ovat ja kuinka ne tunnistetaan? 2. Minkälaisia tapoja ketterässä vaatimusmäärittelyssä käytetään? Yleinen vaatimusmäärittelyprosessi sisältää neljä vaihetta. Ensin arvioidaan järjestelmän liiketoiminnallinen tarpeellisuus (kannattavuusselvitys). Tämän jälkeen etsitään vaatimuksia (selvitys ja analyysi) ja käännetään ne johonkin standardimuotoon (spesifikaatio). Viimeisessä vaiheessa tarkistetaan, että vaatimukset määrittävät järjestelmän juuri asiakkaan haluamalla tavalla (validointi). Ketterässä vaatimusmäärittelyssä on neljä yleistä käytäntöä. Korkean tason kanssakäyminen asiakkaan ja kehitystiimin välillä, iteratiivinen eli toistava lähestymistapa vaatimusmäärittelyyn, vaatimusten priorisointi perustuen asiakkaalle syntyvään arvoon ja myös ei-funktionaalisten vaatimusten tunnistus. Lisäksi voidaan sanoa, että vaatimusten dokumentointi ketterissä menetelmissä on vähäistä. Tämän tutkimuksen tuloksia voidaan yleisesti ottaen hyödyntää ja kehitettyä mallia voidaan käyttää vaatimusmäärittelyn ohjenuorana ketterissä ohjelmistoprojekteissa
Nyman, Pontus, i Stefan Sand. "Industrial WLAN". Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20340.
Pełny tekst źródłaWLAN in the form of IEEE 802.11 is not used to any wide extent in the industrial environment. We examine how the protocol can be used for data communication in such an environment with regard to noise immunity and computing power needs, in the form of an empirical investigation. These studies have been conducted in an industrial environment with the three most commonly used standards IEEE 802.11b/g/n. The purpose of this paper is to understand what it is in the environment that disturbs signals and if the newest standard IEEE 802.11n has something new to add to the table that could revolutionize the focus. Tests and studies have shown that 802.11b and 802.11n is the best in terms of signal strength with interference in the environment. 802.11n is superior in terms of high bit rate.
Espinoza-Gonzales, Javier-Jesús-Rolando, i Marco-Andrés Plasencia-Castro. "Estudio de prefactibilidad para la instalación de una planta procesadora de snacks rellenos y fritos". Bachelor's thesis, Universidad de Lima, 2017. http://repositorio.ulima.edu.pe/handle/ulima/4471.
Pełny tekst źródłaTrabajo de investigación
Liu, Yun 1969. "A study of key mechanisms for concurrent engineering processes /". Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83872.
Pełny tekst źródłaResearch outcomes indicated that the use of CE was beneficial as long as the uncertainty of information during product development was moderate to low. When uncertainty was high, sequential engineering was best. Several cases were demonstrated.
The distribution of effort during product development was studied and it showed that processes should be designed to avert rework due to design versions (complete redesign of the product) and should emphasize churn (redesign in small steps during teamwork).
Dawson, Donald Wight 1956. "Maximizing customer satisfaction by optimal specification of engineering characteristics". Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282557.
Pełny tekst źródłaGopinath, Varun. "Industrial Silo Optimization". Thesis, Linköpings universitet, Maskinkonstruktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-67645.
Pełny tekst źródłaGarcia, Marelys L. "Autonomous Interpretation of Statistical Analysis For Engineering Decision Making". FIU Digital Commons, 1999. https://digitalcommons.fiu.edu/etd/3834.
Pełny tekst źródłaTANKERSLEY, KARLA. "AN INDUSTRIAL ENGINEERING MODEL APPLYING THE BEHAVIOR-BASED SAFETY APPROACH". University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1196094394.
Pełny tekst źródłaHales, C. "Analysis of the engineering design process in an industrial context". Thesis, University of Cambridge, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377194.
Pełny tekst źródłaHinrichsen, Sven [Verfasser]. "Arbeitsrationalisierung mittels Methoden des Industrial Engineering in Dienstleistungsbetrieben / Sven Hinrichsen". Aachen : Shaker, 2007. http://d-nb.info/1164338994/34.
Pełny tekst źródłaQueirós, Diogo Cerqueira. "Valorization of industrial residues through mixed microbial cultures eco-engineering". Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22465.
Pełny tekst źródłaHoje em dia, há uma necessidade urgente de reinventar os processos industriais a partir dos quais a nossa sociedade subsiste, tornando-os mais sustentáveis. A União Europeia (UE) estabeleceu um conjunto de pacotes com medidas que abrangem todo o ciclo: desde a produção ao consumo e à gestão de resíduos, e quanto ao mercado de matérias-primas secundárias. Pretende-se, com isto, caminhar em direção a uma economia circular, dando um destino diferente a todos os resíduos gerados. Em Portugal, umas das maiores e principais atividades económicas diz respeito à indústria papeleira. Consequentemente, grandes quantidades de resíduos são geradas. Estes são aproveitados para a produção de energia ou químicos para betumes e colas. Contudo, outras vias de valorização devem ser exploradas. São dois os principais métodos usados para a produção de papel: Kraft ou Cozimento ao Sulfito Ácido. O último dá origem ao licor de cozimento ao sulfito ácido (LCSA), rico em lenhosulfonatos (LS), compostos fenólicos e derivados, açúcares, como xilose e glucose, e ácido acético. Apesar da fração significativa de compostos recalcitrantes e inibidores, o LCSA pode ser valorizado através de processos microbiológicos. Biopolímeros, como polihidroxialcanoatos (PHA), substratos microbianos, e building-blocks, como ácidos orgânicos de cadeia curta (AOCC), podem ser produzidos. Os PHA são um grupo promissor de polímeros degradáveis com potencial para substituir alguns dos termoplásticos mais comuns. Nos últimos anos, a investigação tem-se focado no desenvolvimento de alternativas à produção deste polímero, incluindo o uso culturas microbianas mistas (CCM) e de resíduos industriais como substrato. O uso de CCM faz com que não sejam precisas condições de esterilidade e permite o uso de equipamento mais barato. O ponto fulcral para a produção de PHA a partir de CCM é a seleção da cultura. Normalmente, esta é feita submetendo a cultura a períodos de alternância de disponibilidade de carbono, designada alimentação aeróbia dinâmica (AAD). Os AOCC são monoácidos alifáticos com uma vasta gama de aplicações na indústria alimentar, farmacêutica e química. Desempenham, também, um importante papel enquanto compostos intermediários em processos biológicos, como a produção de PHA. Neste trabalho, o processo de produção de PHA a dois e três passos, usando o LCSA, foi estudado. O processo a dois passos incluiu (1) o enriquecimento da CCM em microrganismos (MO) acumuladores de PHA, usando diretamente o LCSA, seguido de (2) maximização da produção, usando a cultura selecionada e o LCSA. No processo a três passos, um passo preliminar de acidificação foi introduzido antes da seleção, com vista à conver-são dos açúcares do LCSA em AOCC. Todos os passos, e respetivos impactos nos passos seguintes, foram estudados. Paralelamente, a caracterização da comunidade microbiana do passo de seleção foi realizada, de forma a afinar os parâmetros operacionais para melhorar a produção de PHA. O processo a dois passos levou à seleção de uma cultura com baixa capacidade acumulativa, apesar da estabilidade do reator. Para além disso, os longos períodos necessários à estabilização (250 dias) constituem um obstáculo à viabilidade do processo. Posteriormente, uma extensa caracterização microbiológica revelou uma população paralela incapaz de acumular PHA. Esta população pode ter subsistido graças à fração de açúcares, a qual uma CCM não consegue converter em PHA. Para reduzir o tempo de estabilização do reator de seleção e entender o efeito dos AOCC na seleção de MO acumuladores de PHA, o LCSA foi suplementado com ácidos sintéticos. Obteve-se, assim, uma cultura estável com apenas 25 dias de operação. Adicionalmente, a cultura selecionada conseguiu acumular um máximo de 47.1%, 7 vezes mais elevado do que aquele obtido nas condições anteriores. A comunidade microbiológica era dominada por Betaproteobacteria, nomeadamente, Acidovorax (71%). Uma vez provada a relação entre estabilidade do reator e a presença de ácidos, o passo seguinte focou-se na fermentação acidogénica do LCSA. Ao invés do uso de uma típica cultura anaeróbia, foi possível selecionar MO acidogenos, capazes de converter os açúcares em AOCC, a partir de uma cultura aeróbia. O processo decorreu num reator contínuo de mistura perfeita (RCMP) sem controlo de pH. Obteve-se, desta forma, um máximo de 7.45 gCOD L-1 de ácidos, correspondendo a um grau de acidificação de 38.0%. Na produção de AOCC, a influência do pH e da conformação do reator foi analisada. Controlando o pH a 6, 7 e 8 num RCMP obteve-se perfis variados de ácidos com uma concentração de 2.36, 2.38 e 2.27 gCOD L-1, respetivamente. Alterando a conformação do reator para reator contínuo de leito fixo, obteve-se um perfil de ácidos dominado pelo ácido butírico. Caracterizou-se, igualmente, por uma maior estabilidade do que o RCMP sem controlo de pH. Por fim, o processo a três passos foi estudado. O efluente recolhido dos reatores de acidogénese foi usado para selecionar uma CCM. Uma vez mais, não demorou mais que 25 dias a alcançar uma fase estável de cada vez que os parâmetros operacionais eram manipulados (tempo de retenção hidráulico, carga orgânica e/ou duração do ciclo). Uma cultura robusta foi obtida com uma boa capacidade acumulativa de PHA usando diferentes resíduos. Um máximo de 74.4% de PHA foi alcançado sob limitação por azoto. Diferentes copolímeros e homopolímero foram produzidos através do uso de diferentes resíduos.
Nowadays, there is an urgent need to reinvent the industrial processes in which our society relies, making them more sustainable. The European Union (EU) established a set of packages with measures covering the whole cycle: from production and consumption to waste management and the market for secondary raw materials. It is intended to move from a “cradle-to-grave” tendency, and start to give a different destination to all residues and wastes generated. In Portugal, one of the main and biggest activities is the pulp and paper industry. Consequently, large quantities of residues are generated and are usually burnt for energy or chemicals recovery and for concretes additives and adhesives, but other ways to valorize them are needed. Two main process are used for pulp making: kraft and acidic aulfite pulping. The latter originates hardwood sulfite spent liquor (HSSL) which is characterized for having significant amounts of lignosulphonates (LS), phenolic extractives compounds and derivatives, sugars such as xylose and glucose and acetic acid. Despite its considerable fraction of recalcitrant and inhibitory components, HSSL can be valorized through microbial conversion. Biopolymers such polyhydroxyalkanoates (PHA) and microbial substrates and building blocks like short-chain organic acids (SCOA) can be produced. PHA are a promising group of eco-efficient biodegradable polymers with potential to replace some of the most commonly used thermoplastics. In recent years, research focused on the development of alternative PHA production processes, including the use waste/surplus based feedstocks and mixed microbial cultures (MMC). MMC do not require sterilization and expensive equipment, thereby reducing costs. The key point of PHA production by MMC is culture selection, which is generally carried out by subjecting cultures to alternate periods of carbon availability, designated as aerobic dynamic feeding (ADF). SCOA are aliphatic monocarboxylic acids, with a vast number of applications in food and beverages industry, pharmaceutical and chemical fabrication fields. Also, they have an important role as intermediates in many biological processes, such PHA production. In this thesis, two and three-stage PHA production processes from HSSL were studied. The two-stage process included (1) the enrichment of an MMC in PHA-storing microorganisms (MO) direct from HSSL, followed by (2) maximization of PHA production using the selected culture and the HSSL. In the three-stage, a preliminary step of acidification, where the sugars fraction is converted into SCOA was introduced before the selection step. All stages were studied and the respective impact of each stage on subsequent ones was also assessed. In addition, microbial community characterization of the selection stage was done to tune operational parameters towards the improvement of PHA accumulation. The two-step process led to a culture with low PHA storage performance, despite the stability of the selection reactor. Furthermore, the long stabilization time of the process (250 days) required could be a significant obstacle to the viability of the process. Later, an extensive microbial characterization revealed a side population that might be responsible to hinder the selection step stopping the dominance of PHA-storing MO. Such fact, could be due to the sugars fraction that MMC are not able to convert into PHA. To decrease the stabilization time and understand the effect of SCOA in the PHA-storing MO selection, HSSL was supplemented with synthetic SCOA. A stable MMC was reached after only 25 days. Additionally, the selected MMC reached a maximum PHA content of 47.1%, which was 7 times higher than in the previous condition. The selection step led a community dominated by Betaproteobacteria, namely Acidovorax (71%). Once proved that the single addition of SCOA led to stable cultures, the next step focused on the acidogenic fermentation of HSSL. Instead of using a typical anaerobic culture, from an aerobic MMC inoculum was possible to successfully select acidogenic microorganisms able convert sugars into SCOA without pH control in a continuous stirring tank reactor (CSTR). The maximum concentration of SCOA produced was 7.45 gCOD L-1, corresponding to a degree of acidification 38.0%. In SCOA production, pH and reactor conformation influence was also assessed. Controlling pH at 6, 7 and 8 in the CSTR resulted in diverse SCOA profiles with average productions of 2.36, 2.38 and 2.27 gCOD L-1, respectively. Changing the reactor conformation from CSTR to moving bed biofilm reactor (MBBR) led to a profile dominated by butyric instead of acetic acid, with a more stable production than the CSTR without pH control. Finally, the three-stage process was applied. The effluent collected from the acidogenic fermentation was used to enrich an MMC. It took no longer than 25 days to reach a stable phase every time an operational parameter (HRT, OLR and/or cycle length) was changed. A robust culture was obtained, that despite being selected with only one of the previous effluents, it could accumulate PHA when different streams from the pulp industry were fed. A maximum of PHA accumulation of 74.4% was reached, under ammonium limitation. Moreover, different copolymers and homopolymer were obtained through the feeding of the different streams.
Benjuma, Nuria Mahmud. "An educational framework to support industrial control system security engineering". Thesis, De Montfort University, 2017. http://hdl.handle.net/2086/15494.
Pełny tekst źródłaZibi, Lindizwe Mthanjiswa. "Industrial brine characterisation and modelling". Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/11279.
Pełny tekst źródłaIncludes bibliographical references.
Industrial wastewater contains many soluble inorganic and organic components and solid particles. This study focused on inorganic industrial hypersaline brines. Chemical engineering presents a variety of mechanical, thermal, biological and chemical processes capable of treating hypersaline brines to the standard required by legislation. However, some of these technologies are inefficient, costly and outdated and are not applicable in solving modern brine accumulation problems.
Hayden, Torrey Rahe Schenkenberger. "Wavelength Modulation Spectroscopy of Industrial Flame Systems". Thesis, University of Colorado at Boulder, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10928017.
Pełny tekst źródłaCombustion is widely used for materials processing, propulsion, and power production. Understanding the temporal and spatial variations within practical combustion systems can help to optimize their stability, uniformity, emissions, and/or efficiency. Wavelength modulation spectroscopy (WMS) provides quantitative, non-intrusive, time-resolved measurements of line-of-sight thermodynamic properties in a gas sample. This dissertation describes the development and application of novel WMS sensors for measurements in industrial flame environments. After an overview of WMS, we describe the development of the first WMS sensor to measure OH radical near 1491 nm. We perform the first dual-comb spectroscopy measurement above a premixed flame in order to develop accurate models for the H2O absorption that interferes with OH absorption at elevated temperatures. The model improves the absolute OH measurement accuracy. We apply the OH sensor in conjunction with temperature and H2O mole fraction WMS sensors to characterize a premixed ribbon burner interacting with an industrial chilled-roller polymer-treatment system. Measurements at the surface of the polymer, together with post analysis of the surface oxidation, provides the first experimental demonstration of the connection between concentrations of OH radical in a premixed flame and the level of oxidation of polypropylene film in flame processing. The WMS sensors are used to probe the temporal, vertical and 2D variation in the heated, buoyant jet above an iron-chromium alloy catalytic combustor, which could be used for industrial materials processing. We develop a new pathlength correction method that uses computational fluid dynamics simulations to account for the effect of the narrowing and billowing of the heated gases on the measured water vapor mole fraction. The vertical profiles of temperature and H2O mole fraction show a high likelihood of additional combustion above the catalytic surface under certain operating conditions. Finally, we extend the WMS technique to measure high-density gases by performing the first large amplitude wavelength modulation spectroscopy with a MEMS-Tunable Vertical Cavity Surface-Emitting Laser (MEMS-VCSEL). We demonstrate the technique on high-pressure mixtures of CO2 in air that are 2.5 times higher density than previously published WMS measurements (equivalent to greater than 255 atm at 1500 K). Together, these measurements demonstrate the utility of WMS sensors in optimizing and characterizing industrial combustion systems.
Grice, Steven J. "Optical fibre sensors and their applications in the industrial weighing and aerospace industries". Thesis, Aston University, 2010. http://publications.aston.ac.uk/15208/.
Pełny tekst źródłaPuñal, Pereira Pablo. "Efficient IoT Framework for Industrial Applications". Doctoral thesis, Luleå tekniska universitet, EISLAB, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-95.
Pełny tekst źródłaRas, Cornelia. "An industrial ecology approach to salt-related environmental sustainability issues in a large industrial complex". Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10737.
Pełny tekst źródłaIncludes bibliographical references (p.93-106).
This thesis aims to demonstrate the application of industrial ecology (IE) theory to understand environmental sustainability problems relating to the accumulation of saline wastes and to study the potential for integrated technology interventions which take multi-party engagements and effects into account.
Naboulsi, Samir K. "Modeling the manufacturing of industrial heterofilaments /". The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487864485230503.
Pełny tekst źródłaCoral, Melissa Patricia. "Analyzing Cognitive Workload Through Eye-related Measurements: A Meta-Analysis". Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1464209028.
Pełny tekst źródłaBhuiyan, Farina. "Dynamic models of concurrent engineering processes and performance". Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38153.
Pełny tekst źródłaHedberg, Erik. "Control, Models and Industrial Manipulators". Licentiate thesis, Linköpings universitet, Reglerteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171560.
Pełny tekst źródłaDarlington, Mansur. "Cognition and the engineering design requirement". Thesis, University of Bath, 2002. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250822.
Pełny tekst źródłaMowrey, Corinne H. "An exploratory study of mixed-width aisle layouts for order picking in distribution centers". Wright State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=wright1319334135.
Pełny tekst źródłaPaul, Tiffany M. "Application of the Augmented Operator Function Model for Developing Performance Metrics in Persistent Surveillance". Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1389657226.
Pełny tekst źródłaWard, Kerry Kathleen. "A Framework for Centralizing Inventory in Pharmaceutical Supply Chains". Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1496159158415396.
Pełny tekst źródłaConde, Ortiz Daniel. "Ethical Hacking Of An Industrial Control System". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-285573.
Pełny tekst źródłaDe flesta av programvaror har sårbarheter. Penetrationstest eller etiskhacking kan användas för att identifiera dem. Denna avhandling utför testerenligt penetrationstestmetoden i ett industriellt kontrollsystem i stor skala.Målet är att upptäcka vilka sårbarheter som finns i dessa system, med fokuspå attacker från deras nätverk. Flera tillvägagångssätt användes för attattackera servrar och tjänster på nätverket, både från in- och utsidan avmaskinera. Kritiska sårbarheter hittades i samband med autentisering ochstörande kommunikation mellan servrar, som bör åtgärdas för att förhindraytterligare potentiella attacker.