Dissertations / Theses: 'Material Science and Technology (MST)'

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Kotze, Reinhardt. "Detailed non-Newtonian flow behaviour measurements using a pulsed ultrasound velocimetry method: Evaluation, optimisation and application." Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/2183.

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Thesis (DTech (Electrical Engineering))--Cape Peninsula University of Technology, 2011
Ultrasonic Velocity Profiling (UVP) is both a method and a device to measure an instantaneous one-dimensional velocity profile along a measurement axis by using Doppler echography. UVP is an ideal technique since it is non-invasive, works with opaque systems, inexpensive, portable and easy to implement relative to other velocity profile measurement methods. Studies have suggested that the accuracy of the measured velocity gradient close to wall interfaces need to be improved. The reason for this is due to, depending on the installation method, distortion caused by cavities situated in front of ultrasonic transducers, measurement volumes overlapping wall interfaces, refraction of the ultrasonic wave as well as sound velocity variations. A new ultrasonic transducer, which incorporates a delay line material optimised for beam forming could reduce these problems (Wiklund, 2007). If these could be addressed, UVP could be used for the measurement of velocity profiles in complex geometries (e.g. contractions, valves, bends and other pipe fittings) where the shape of the velocity profile is critical to derive models for estimating fluid momentum and kinetic energy for energy efficient designs. The objective of this research work was to optimise the UVP system for accurate complex flow measurements by evaluating a specially designed delay line transducer and implementing advanced signal processing techniques. The experimental work was conducted at the Material Science and Technology (MST) group at the Cape Peninsula University of Technology (CPUT). This work also formed part of a collaborative project with SIK - The Swedish Institute for Food and Biotechnology. Acoustic characterisation of the ultrasonic transducers using an advanced robotic setup was done at SI K. Different concentrations of the following non-Newtonian fluids exhibiting different rheological characteristics were used for testing: carboxymethyl cellulose (CMC) solutions, kaolin and bentonite suspensions. Water was used for calibration purposes.

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Chiang, Diana C. (Diana Chih-Chan) 1975. "Underfill material selection for flip chip technology." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50454.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1998.
Includes bibliographical references (leaf 34).
Six underfill materials were examined for the selection of an appropriate underfill material for Digital Equipment Corporation's flip chip development project. Several tests were performed to determine the material properties, process properties, and the reliability of each underfill material. A material with a fast flow rate, uniform and void free flow pattern, fast curing schedule, good thermal and mechanical properties, and good reliability results is needed to satisfy the requirements for this project. Materials F and E exhibited all the above requirements and were concluded as the two best underfill materials for the flip chip process. Important material properties which contributed to the desired results of these materials include a filler particle content of about 65%, a weight loss percentage during cure of less than 1%, and a Tg of 140°C.
by Diana C. Chiang.
S.M.

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Masaki, Kinuko. "Measuring material properties of tectorial membranes from normal and genetically modified mice." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35549.

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Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2006.
Includes bibliographical references (p. 127-138).
With the discovery of hearing disorders caused by mutations in proteins expressed in the tectorial membrane (TM), the importance of the TM in cochlear mechanics has never been clearer. However, the exact role of the TM in cochlear mechanics remains a mystery. In this thesis, I have investigated material properties of two mouse models of genetic hearing disorders that affect proteins found in the TM, a-tectorin and type XI collagen. The Tecta mutants had a missense mutation in ac-tectorin, a protein found exclusively in the TM in the organ of Corti. The effect of the mutation was to decrease the fixed charge concentration, which was found to be the primary determinant of the bulk modulus. However, the shear modulus was not affected. Collla2 is one of the genes that encodes for type XI collagen. Mutation in this gene causes no significant change in fixed charge concentration and, therefore, bulk modulus. However, the radial shear impedance is lowered. These measurements suggest that TM shear impedance is dominated by radially oriented collagen fibers and plays a key role in driving outer hair cell (OHC) bundle deflection. At the same time, the TM bulk modulus is dominated by the presence of fixed charge and may play a key role in coupling energy from outer to inner hair cells.
by Kinuko Masaki.
Ph.D.

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Hoehl, Melanie Margarete. "Versatile, automated sample preparation and detection of contaminants and biological materials." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/85218.

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Thesis: Ph. D., Harvard-MIT Program in Health Sciences and Technology, 2013.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages xviii-xxxvi).
Contamination of food, water, medicine and ingestible household products is a public health hazard that episodically causes outbreaks worldwide. Existing laboratory methods are often expensive, require a laboratory environment and/or trained staff to perform manual steps. The aim of this PhD thesis was to create and test methods and instruments for affordable diagnostic tests for contaminants and pathogens. To achieve this goal, the LabReader was introduced, which employs a LED-based detection scheme for four simultaneous fluorescence- and UV-measurements. Assays were developed to detect (di-)ethylene glycol in consumables ≥0.1wt% and alcohols ≥1ppb. Pathogens in water, foods and blood were detected at ≥104 CFU/ml using nonspecific intercalating dyes. To gain sensitivity and specificity for cell-based analysis, biochemical amplification methods had to be incorporated. To be deployable outside a laboratory, sample preparation needed to be automated. Automation was achieved by combining the LabReader with the already developed LabTube, a disposable platform for automated DNA extraction inside a standard centrifuge. Performing DNA amplification/readout in an external optical reader, made the LabSystem broadly deployable and flexible. DNA extraction of food bacteria (E.coli and Alicyclobacillus) was optimized inside the LabTube for 102-109 inserted DNA copies. The extracted DNA was amplified using the qualitative isothermal LAMP method and semi-quantitative, real-time PCR inside the LabReader. The combined extraction and amplification detection limit of the LAMP-LabSystem and the quantitation limit of the PCR-LabSystem were as low as 102 copies. Performing extraction and amplification inside the centrifuge/LabTube was also outlined, which may be preferable when contamination risks are high. After theoretically evaluating heating methods, a battery-driven heated LabTube was designed, in which 102-108 DNA copies of VTEC E.coli were extracted, LAMP-amplified and visually readout within 1.5 hrs. The major contribution of this thesis is the full system integration of versatile, automated sample preparation and detection systems. They offer great flexibility as they may be used with each other or in combination with other analytic methods, depending on the application. At the same time, they are frugal and deployable at low-to-medium throughput - even outside a traditional laboratory. Whilst the focus was put on food safety, the systems were also used for medical, environmental or consumer product quality applications, hence demonstrating their broad applicability.
by Melanie Margarete Hoehl.
Ph. D.

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Yüksel, Ayça. "The AlInP material system in heterojunction bipolar transistor technology." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/37728.

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Tay, Pei Kun Richie. "Synthesis of composite hydrogels incorporating D,L-cyclic peptide nanotubes as a platform for materials engineering." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78244.

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Thesis (S.M.)--Harvard-MIT Program in Health Sciences and Technology, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 27-30).
Composite hydrogels find increasing use as biomaterials because the addition of a filler often improves on the material properties of the original matrix, or provides new optical, magnetic, conductive or bioactive functionalities not inherent to the hydrogel. In this work we synthesized nanocomposite gelatin methacrylate (GelMA) hydrogels that incorporate D,L-cyclic peptide nanotubes. These nanotubes are biocompatible, stiff and their physical and chemical properties can be tailored simply by changing the amino acid sequence of the peptide. We show that the nanotubes successfully integrated into the hydrogel matrix and provided some mechanical reinforcement, without affecting hydrogel porosity or hydration characteristics. We will be using this composite system as a platform for engineering hydrogels with unique physical and biological properties to the hydrogel, for application as biological scaffolds.
by Pei Kun Richie Tay.
S.M.

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Lina, Wahrer. "Material science and garment technology towards circular economies within the fashion industry." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-696.

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There has been an increase of the consumption rate and consumers are buying garments that they dispose in too early of a stage of the product lifecycle. This has caused an increase regarding landfill of waste. The aspect of implementing environmental oriented material science and garment technology has not been taken into consideration in the design process, something that quickly became an issue when the consumption rate increased. Therefore it is essential to rethink and restructure the business models applied today. The implementation of a circular economy, which focuses on giving textiles and garments a second life and basing production on used fibres whilst not harming the natural resources in the process, is a good start of the long journey to recovery which lies ahead. Both fast fashion companies and premium lifestyle brands are nowadays applying and integrating new business models into their daily operations, Tommy Hilfiger is an example of such a company. Purpose: The purpose of this thesis is to explore the relationship between material science, garment technology and the concept of circular economies from a premium lifestyle brand perspective The researcher will explore how material science and garment technology can prevent faulty items and short product lifecycles. Furthermore, the researcher will investigate how a company develops underwear collections with regards to material science, garment technology, and the concept of circular economies. The company Tommy Hilfiger will be implemented as an exponent throughout this report. Research questions: • What is the relationship between material science, garment technology, and the concept of circular economies? • What does a premium lifestyle brand take into consideration regarding the concept of circular economies when developing a collection of underwear? Methodology: This thesis was conducted by applying a qualitative method and by implementing a deductive approach. The gathering of secondary data was done through assembling suitable concepts and theories. The researcher collected the primary data through a participating observation and four qualitative interviews. The participating observation corresponded of an internship at the European headquarters of Tommy Hilfiger in Amsterdam, Netherlands. The researcher executed the interviews via email with key people within the departments of Design, Production, Central Sourcing and Production, and Corporate Responsibility. Conclusion: Material science and garment technology are correlated given that the choice of material and manufacturing technique utilized in production determines the durability and sustainability level of the fabric output. Therefore the two concepts are further correlated to the product aspect, which can enable a closed textile value chain loop, of a circular economy based business model. A premium lifestyle brand takes the aspects of design out waste, build resilience through diversity, work towards using energy from renewable sources, and think in consecutive processes into consideration regarding the concept of circular economies when developing a collection of underwear.

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Herman, Jennifer Linda. "Effecting Science in Affective Places: The Rhetoric of Science in American Science and Technology Centers." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1396961008.

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Dixon, Zachary Parke. "Material Expertise: Applying Object-oriented Rhetoric in Marine Policy." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6224.

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This dissertation applies object-oriented rhetorics and posthuman philosophies to environmental policy deliberation in order to help bridge gaps between policy makers, scientists, and citizens. For environmental policy scholars the non-credentialed expertise of local, or indigenous stakeholders is valued as possessing technical, objective merit that can improve the development and implementation of environmental policies. However, the utilization of stakeholder expertise in environmental policy faces serious challenges in terms of finding common grounds for communication within complex techno-social systems, of overcoming deep cultural differences and perceptions, and grave ethical issues of access and power. This dissertation develops two case studies of marine fisheries policy debates using theories of material ontology to detail the process of how the expertise of ordinary citizens develops within the context of environmental policy and how that expertise might be better utilized. By employing object-oriented rhetorical theories to trace material agency through the Snook and Gamefish’s (SGF) stakeholder integration programs in Florida’s Spotted Seatrout and Common Snook fishery debates, this dissertation argues that a material ontology of expertise offers a means of assessing the quality of lay-publics’ non-credentialed expertise. This dissertation suggests that an enriched since of what material objects are capable of rhetorically helps us develop tangible, actionable tools for environmental policy studies. By understanding expertise in terms of the accretion of material experiences, policy makers and scholars might more easily evaluate and utilize the expertise of environmental policy stakeholders

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wilbourn, jonathan ashley. "UTILIZATION OF DEIONIZED WATER AND NON-MEAT ADJUNCTS TO COMBAT QUALITY ISSUES IN BONELESS CURED HAM ASSOCIATED WITH USING PALE RAW MATERIAL." MSSTATE, 2006. http://sun.library.msstate.edu/ETD-db/theses/available/etd-06292006-132100/.

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The effects of deionized water and PSE pork percentage on the quality of smoked deli ham and retorted pouched ham with and without non-meat adjuncts were evaluated. Product quality was determined through evaluation of water holding capacity, cooked color, protein-protein bind, and sensory quality. A randomized complete block design with either three or four replications was utilized to test treatment effects in three separate experiments. The retorting process showed the potential to reduce the effect of PSE meat on color that is present in raw material and smoked deli ham. In retorted ham, modified food starch and soy protein concentrate reduced (p<0.05) cook loss and starch improved color. Deionized water can be utilized to improve yields (1 %) in smoked deli hams, and 25 % pale pork can be used without negatively affecting (p>0.05) sensory or instrumental quality in a retorted pouched ham product. Modified food starch can also be utilized to increase yields in a retortable-pouched ham without significantly affecting sensory quality.

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O'Beirne, Joanne L. "Development and characterisation of a Portland cement-based dental root filling material." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1528/.

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Mineral trioxide aggregate (MTA) is a Portland cement (PC)-based endodontic material used for sealing root canals. This study investigated the effect of calcium sulphate additions for improving the undesirably-long setting time of MTA-like dental materials, whilst maintaining the mechanical, biological and sealing properties. 10wt%PoP accelerated initial setting times of grey and white model cements and MTA from >6h to <40min, and did not significantly change compressive strengths and relative porosities with long-term storage in media. Cement pastes containing PoP may „false‟ set or stiffen through gypsum precipitation, seen in scanning electron photomicrographs of MTA-like cements with 30wt%PoP. Similar in vitro responses of adult and neonatal BMSC, periosteal and osteoblastic cultures were noted with PoP-modified and unmodified cements. Inhibition of cell growth was seen with 3day-cultures containing modified model cements and MTA, the possible result of calcium hydroxide release from cements. Sealing properties were characterised using dye leakage studies and concluded that the sealing abilities of model cements and MTA were not compromised by PoP addition. In summary, 10wt%PoP has shown potential as a modification to MTA by reducing the setting time whilst maintaining mechanical stability, solubility, in vitro responses to and the sealing properties of MTA, therefore, warrants further investigation.

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Mutlu, Neset. "The Design And Development Of An Online Professional Development Material For Science And Technology Teachers On Assessment And Evaluation." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615179/index.pdf.

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The purpose of this study is to design and development of an online professional development material for science and technology teachers in order to solve their problems related with assessment and evaluation issues of constructivist learning. For this purpose, design and development research method was used in design, development and validation of this instructional tool. Research has been performed in two parts. In the first part, design and development of online professional development material was carried out. In this part, ADDIE model with rapid prototyping procedure was used in three phases. To gather science and technology teachers&rsquo
perceptions and attitudes towards prototypes, semi-structured interview schedule, Internet Tutorial Attitude Questionnaire, and a Checklist for Product Evaluation was conducted to 21 science and technology teachers in total. These data were analyzed using both qualitative and quantitative methods to reveal considerations of science and technology teachers about these prototypes and to make adjustments on these prototypes accordingly. In second part, final version of this material was evaluated. In this phase, researcher used self-efficacy questionnaire about alternative assessment and evaluation methods and a checklist for material validation. These instruments were administered both before and after use of final version of online professional development material. Descriptive data analysis was conducted to reveal differences in participants&rsquo
perceived-knowledge, beliefs, and applications about alternative assessment and evaluation methods after use of online professional development material. Research results disclosed participants&rsquo
beliefs and attitudes towards content, design and usability issues of online professional development material. Besides, validation of online professional development material revealed positive changes in participants&rsquo
perceived-knowledge, their classroom practices, self-efficacy beliefs and their perceptions about appropriateness of alternative assessment methods&rsquo
usage in classroom.

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Gilley, William. "Animations and Interactive Material for Improving the Effectiveness of Learning the Fundamentals of Computer Science." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32899.

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Due to the rapid proliferation of the World Wide Web (WWW) in recent years, many educators are now seeking to improve the effectiveness of their instruction by providing interactive, web-based course material to their students. The purpose of this thesis is to document a set of eight online learning modules created to improve the effectiveness of learning the fundamentals of Computer Science. The modules are as follows:

Algorithms - Definition and specification of algorithms, with a comparison and analysis of several sorting algorithms as examples.
Artificial Intelligence - Overview of current applications in this discipline.
Data Structures - Explanation of basic data structures, including an introduction to computer memory and pointers, and a comparison of logical and physical representations of commonly used data structures.
Machine Architecture - Explanation of data storage, gates and circuits, and the central processing unit.
Number Systems - Discussion of number representation and arithmetic in number systems other than the decimal number system, with a focus on binary numbers and binary arithmetic.
Operating Systems - Explanation of the purpose of operating systems and the major components that make up an operating system.
Programming Languages - Explanation of the fundamental concepts in procedural programming languages.
Software Engineering - Introduction to software life cycle models and an overview of the procedural and object-oriented paradigms.

Each module consists of a set of lessons and review questions written in HyperText Markup Language (HTML). Embedded in these pages are various interactive components implemented as Flash animations or Java applets. The modules currently reside on the Computer Science courseware server of Virginia Polytechnic Institute and State University (Virginia Tech) and can be viewed at the following WWW site: http://courses.cs.vt.edu/csonline/.

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Master of Science

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Agbisit, Roderick Nazario Malcaba. "Relationships between material properties and microstructure-mechanical attributes of extruded biopolymeric foams." Diss., Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/334.

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Hussain, Faris A. Karim. "Evaluating frozen beef and meat packaging material exposed to low levels of ammonia gas." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1646.

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Baser, Deven Swapneshu. "Envisioning Catalytic Processes in Chemical Looping Systems: Material and Process Development." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586359263610608.

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Kwaira, Peter. "Effect of a Material Science course on the perceptions and understanding of teachers in Zimbabwe regarding content and instructional practice in Design and Technology." Thesis, Online Acess, 2007. http://etd.uwc.ac.za/usrfiles/modules/etd/docs/etd_gen8Srv25Nme4_7304_1263166264.pdf.

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Klokkernes, Torunn. "Skin processing technology in Eurasian reindeer cultures : a comparative study in material science of Sàmi and Evenk methods : perspectives on deterioration and preservation of museum artefacts : PhD thesis /." Rudkøbing [Denmark] : Langelands Museum, 2007. http://www.langelandsmuseum.dk/LMR%20Press/2007%20Klokkernes%20-%20Skin%20Processing%20LMR-PRESS.pdf.

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Klevsäter, Anton. "Ytbehandling för att motverka uppbyggning : Undersökning av olika ytbehandlingsmetoder och material för applikation i en mjukpappersmaskin." Thesis, Karlstads universitet, Institutionen för ingenjörsvetenskap och fysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-55245.

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This exam report includes a survey of surface treatment materials and their associated surface treatment methods for application in a tissue machine commissioned by Valmet AB. The tissue machine produces 24 hours a day in a demanding environment consisting of water, heat, oils, glue, dust and various chemicals. The demanding environment makes it difficult to maintain the machine clean due to the limited access at various machine parts when the machine is operating, which can lead to both personal risks and risks for production stoppages. These factors form the basis for the build-ups that takes place at various machine parts. Mostly, it’s about paper fibres that either are loose and dry or clustered into lumps. They also appear as lumps of fibres held together by oil, glues or other chemicals. Over time, they can loosen and, in the worst case, are due to breakages and production failures. The build-ups can also destroy the function of moving machine parts or lead to corrosion. The commission was assigned by Bengt O Andersson and Mickey Lindevall at Valmet AB. The project was conducted as the examining part in the course Degree Project for the Bachelor of Science in Mechanical Engineering, MSGC17, at the faculty of health, science and technology at Karlstad university. The project was carried out individually by a student at the Bachelor of Science program in Mechanical Engineering at Karlstad university. This degree project has taken precedence where the previous degree project at Valmet AB completed its work. The previous degree project has served as a reference document in this report to work out a requirement specification and identifying machine parts that are desired to undergo some form of surface treatment. The acting environments that exist at the various machine parts that are desired to be surface treated have also been examined from the previous degree project. This report has taken a different approach compared to the previous thesis work and is instead directed towards finding suitable surface treatment materials and associated application methods using the material database, CES EduPack. The purpose of the degree project has been to present suitable surface treatment materials and associated surface treatment methods. These are to solve the existing problems, thus facilitating cleaning and maintenance of the tissue machine. To achieve this, a list of suitable materials and associated surface treatment methods has been presented. From this list, conclusions are drawn to find as good surface treatment materials and its associated application methods as possible. With these, the problem should be eliminated or reduced drastically for the number of build-ups regarding the treated machine parts. The objective for this project thesis has been to analyse and proposing suitable methods and materials for surface treatments. With the chosen method and material for the surface treatment, the surfaces upon application are to achieve such properties that build-ups do not adhere to them. The project also contains a requirement specification that has been translated into restriction terms that all investigated material candidates have had to fulfil to be classified as suitable material candidates. The report has also taken a stand to the literature and theory available in the subject area to further investigate what materials are currently used in similar industrial applications. The information that has been processed has, in a final phase, been used as a basis for the list of suitable surface treatment materials and their associated surface treatment methods presented in the report.
Denna examensrapport innefattar en undersökning av ytbehandlingsmaterial samt tillhörande ytbehandlingsmetoder för applicering i en mjukpappersmaskin på uppdrag av Valmet AB. Mjukpappersmaskinen producerar 24 timmar om dygnet i en krävande miljö bl.a. bestående av vatten, värme, oljor, lim, damm samt diverse kemikalier. Den krävande miljön gör att det är svårt att hålla maskinen ren eftersom att det är svårt att komma åt överallt under drift, vilket kan medföra både personrisker och risker för produktionsstopp. Dessa faktorer ligger till grund för att uppbyggningar uppstår vid diverse maskindelar. Mestadels handlar det om pappersfibrer som endera är lösa torra eller fasttorkade i klumpar men de förekommer även som klumpar av fibrer som hålls ihop av olja, lim eller andra kemikalier. Med tiden så kan dessa lossna och ligger i värsta fall till grund för banbrott och produktionsbortfall. Uppbyggningarna kan även förstöra funktionen på rörliga maskindelar eller leda till korrosion. Uppdraget är utgivet av Bengt O Andersson och Mickey Lindevall på Valmet AB. Projektet utförs som den examinerande delen i kursen Examensarbete för högskoleingenjörsexamen i Maskinteknik, MSGC17 vid fakulteten för hälsa, natur- och teknikvetenskap vid Karlstads universitet. Projektet har utförts enskilt av studerande vid Högskoleingenjörsprogrammet i Maskinteknik vid Karlstads universitet. Detta examensarbete har tagit vid där föregående examensarbetare vid Valmet AB avslutade sitt arbete. Dennes examensrapport har fungerat som ett referensdokument i denna rapport för att kunna arbeta fram en kravspecifikation samt identifiera maskindelar som önskas genomgå någon form av ytbehandling. De verkande miljöerna som existerar vid de maskindelar som önskas ytbehandlas har även undersökts från det tidigare examensarbetet. Denna rapport har tagit ett nytt tillvägagångssätt gentemot föregående examensarbetare och riktas istället mot att identifiera lämpliga ytbehandlingsmaterial samt tillhörande applikationsmetoder med hjälp av materialdatabasen, CES EduPack. Syftet med detta examensarbete har varit att presentera lämpliga ytbehandlingsmaterial samt tillhörande ytbehandlingsmetoder som löser de befintliga problemen och därmed underlättar rengöring och underhåll av mjukpappersmaskinen. För att kunna göra detta har en lista av lämpliga material samt tillhörande ytbehandlingsmetoder tagits fram. Ur denna lista med material och ytbehandlingsmetoder dras slutsatser för att hitta ett så bra ytbehandlingsmaterial och tillhörande ytbehandlingsmetod som möjligt. Med dessa skall problemet elimineras eller minskas drastiskt gällande antal uppbyggningar vid behandlade maskindelar. Examensarbetet har som mål att analysera och ge förslag på lämpliga metoder och material för ytbehandlingar. Med vald metod och material för ytbehandling skall ytorna vid applicering få en sådan egenskap att uppbyggningar inte vidhäftar vid dessa. Projektet innehåller även en kravspecifikation som översatts till restriktionsvillkor som samtliga undersökta materialkandidater varit tvungna att passera för att klassas som lämpliga materialkandidater. Rapporten har även tagit ställning till den litteratur och teori som funnits tillgänglig inom ämnesområdet för att vidare undersöka vilka material som används i dagsläget inom liknande industriella tillämpningar. Informationen som tagits fram har i ett slutskede legat som grund för den lista av lämpliga ytbehandlingsmaterial samt dess tillhörande ytbehandlingsmetoder som presenteras i rapporten.

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Höjer, Fredrik. "Putsa infärgat faner : Val av material, snittyta och metod." Thesis, Linköpings universitet, Malmstens Linköpings universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-162975.

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I mitt examensarbete undersöker jag vilken putsmetod som lämpar sig bäst för putsning av infärgat faner utan att infärgat damm fastnar på oönskade områden. Testområdet har varit avgränsat till att undersöka detta problem tillsammans med andra, icke infärgade faner. Frågan är om det finns en metod som på ett effektivt och ergonomiskt sätt garanterar ett bra resultat? Mina tester utgår från om val av material, fiberriktning och snittyta har betydelse för hur det infärgade dammet fastnar på ytan. Min förhoppning är att hantverkare och formgivare ska ta hjälp av denna undersökning för att lättare kunna göra medvetna val där infärgade faner kombineras med andra träslag. Genom intervjuer med andra hantverkare, om deras erfarenheter har ett problemområde kartlagts utifrån vad som är mest relevant för undersökningen. Även litterära studier har gjorts för att bättre förstå träts anatomiska egenskaper. För att uppnå optimala förutsättningar för att infärgat damm inte ska fasta på oönskade områden visar testerna, genom att kombinera infärgat faner med ett bandporigt träslag som har en radiell snittyta tillsammans med en fiberriktning som ligger i samma riktning som putsriktningen, med en putsmetod där direkt sug över putsytan verkar samtidigt som putsningen ger bäst förutsättning för att infärgat damm inte fastnar på oönskade områden.

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Schmidt, Lea. "Ein Material - zwei Verfahren: Das Potenzial eines Monomaterial-Ansatzes von soliden Applikationen auf textilen Substraten aus der Perspektive des Designs." TUDpress, 2020. https://tud.qucosa.de/id/qucosa%3A74814.

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Der Zuwachs an Textile Waste ist eine zentrale Herausforderung der Textilbranche. Der Bedarf nach Textilien steigt und Textilien werden in Ausgestaltung und Funktionalität zunehmend komplexer. Oft werden dabei unterschiedliche Eigenschaften verschiedener Materialien genutzt. Dies führt zu einem Materialmix, der das Textil-Recycling vor zusätzliche Herausforderungen stellt. Das Projekt verbindet die Herausforderung steigender Mengen an Textile Waste mit dem Anspruch, komplexe textile Produkte zu schaffen.

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Passos, Milena Santiago dos. "O compartilhamento de significados entre alunos, pesquisadores e material didático na análise de um projeto de divulgação científica da Fiocruz/PR." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2807.

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Acompanha produto: O compartilhamento...
Esta pesquisa delineia algumas possibilidades de conexão entre o conhecimento didático e o conhecimento científico por meio de um projeto de divulgação científica. A pesquisa aconteceu no Instituto Carlos Chagas – Fiocruz/PR, onde foi realizado, no ano de 2015, o seu primeiro programa de divulgação científica com o ambicioso objetivo de levar vivências científicas à escola. A partir da análise da primeira edição do projeto, desenvolveu-se um material didático para a segunda edição, que ocorreu em 2017. A análise foi essencialmente qualitativa, baseada nos relatos de pesquisadores e de alunos, a partir da qual se identificou as principais expectativas e significados contidos nesse evento didático. A teoria que embasou a produção do material didático é a de D. Bob Gowin, da Universidade de Cornell, que prevê uma tríade: alunos, professores e material didático em interação para o compartilhamento de significados. Os dados analisados permitem indicar que a transposição didática se mostra como a principal dificuldade na divulgação científica, seguida de outros obstáculos percebidos pelos pesquisadores, como a falta de interesse e de conhecimento prévio dos alunos. O material didático desenvolvido tem, portanto, a proposição de ser potencialmente significativo, assumindo o intento de expressar o saber no contexto característico da divulgação científica. Como produto desta pesquisa, foi elaborado um guia que apresenta os resultados e as orientações para que outros pesquisadores possam ter referenciais que os auxiliem a fazer a primeira etapa da transposição didática (saber científico para saber a ensinar) e formular materiais didáticos para a divulgação científica.
This research outlined some possibilities of connection between didactic knowledge and scientific knowledge through a scientific dissemination project. The research was carried out at Instituto Carlos Chagas - Fiocruz-PR, where it was held in 2015, its first scientific dissemination program with the ambitious goal of bringing science experiences to school. From the analysis of the first edition of the project, a didactic material was developed for the second edition, which occurred in 2017. The analysis was essentially qualitative, based on the reports of researchers and students, from which the main expectations and meanings, that were part of this didactic event, were identified. The theory behind the production of the didactic material is the theory of Gowin, which foresees a triad: students, teachers and the didactic material in interaction in order to share meanings. The analyzed data allow us to indicate that the didactic transposition is shown as the main difficulty in the scientific dissemination, besides others perceived by the researchers, such as the lack of interest shown by the students and their lack of prior knowledge. The developed didactic material, therefore, has the proposition of being potentially significant, assuming its purpose as an expression of knowledge, in the context of scientific dissemination. As a product of this research, a guide that presents the results and orientations has been prepared, so that other researchers can have references that may help them to do the first step of didactic transposition and to formulate didactic materials for scientific divulgation.

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Mussarelli, Felipe. "A análise de quadrinhos japoneses sob a ótica de Bakhtin : o mangá como material de referência para a cultura japonesa." Universidade Federal de São Carlos, 2013. https://repositorio.ufscar.br/handle/ufscar/1116.

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Universidade Federal de Minas Gerais
This paper seeks to find in manga (japonese comic books) published in Brazil, references to pop and popular culture of Japan that adds to them encyclopedic features. Assumptions initially depart from recent studies in science, technology and society (STS) that seeks to launch new looks for science and research, indicating that they can be carried in places and through different means. We will seek aid in theories of russian philosopher Mikhail Bakhtin about the studies on the speech genres, trying to find what is peculiar to the manga compared to other forms of comics, and the studies of dialogism, aimed at finding the different voices in the creation of manga and Japanese manga published in Brazil. Through these theoretical and methodological precepts of Bakhtin and studies in science, technology and society, we expect to find in manga published in Brazil, originally published from 2000, and then selecting those whose narratives are closer to everyday topics and or historical elements of its constitution as generic themes, imagery and verbal statements, footnotes, glossaries information in, suggesting references to japonese popular culture and pop. We expect this research to contribute to studies on the manifestations of language as well as studies on STS related mainly in cultural communication.
Este trabalho busca encontrar nos mangás (histórias em quadrinhos de origem japonesa) publicados no Brasil, referências à cultura popular e pop do Japão que agreguem a eles características enciclopédicas. Partiremos dos recentes pressupostos dos estudos em ciência, tecnologia e sociedade (CTS) que buscam lançar novos olhares para a ciência e pesquisa, indicando que as mesmas podem ser realizadas em locais e através de meio diversos. Buscaremos auxílio nas teorias do filósofo russo Mikhail Bakhtin acerca dos estudos sobre os gêneros do discurso, buscando encontrar aquilo que é peculiar ao mangá em relação às outras formas de quadrinhos e os estudos acerca da dialogia, visando encontrar as diversas vozes na criação do mangá japonês e no mangá japonês publicado no Brasil. Por meio dos preceitos teórico-metodológicos de Bakhtin e dos estudos em ciência, tecnologia e sociedade, buscaremos nos mangás publicados no Brasil, inicialmente publicados a partir do ano 2000, e posteriormente selecionando aqueles cujas narrativas estejam mais próximas de temas cotidianos e ou históricos, elementos de sua constituição genérica como temáticas, enunciados verbais e imagéticos, notas de rodapé, informações nos glossários que sugiram referências para a cultura popular e pop japonesa. Esperamos com esta pesquisa contribuir com os estudos sobre as manifestações de linguagem bem como os estudos em CTS ligados principalmente a comunicação cultural.

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Munk, Anders Kristian. "Risking the flood : cartographies of things to come." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:55c2df2e-3506-4a93-8cab-37f133866182.

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Reflecting on fieldwork carried out in the UK insurance sector, the thesis explores the role played by various types of actuarial and hydrological expertise in the performance of flooding as a matter of sustained public concern. In doing so, the question is raised: what analytical status to give the concept of risk when accounting for the epistemic doings involved in bringing yet unrealised future floods to bear on the present? Contrary to most other European countries the provision of flood insurance in the UK is left to the market and organised via an agreement under which insurers pledge to provide cover in areas protected by the Government to a standard of 1:75 years (the average return period between floods). What should be taken into account when mapping out this 1:75 year flood zone is subject to debates constantly revitalised by flood events with changing characteristics as well as new ways of modelling and anticipating what has yet to take place. How should we understand the knowledge claims hardwired into these debates through the involvement of actuarial and hydrological expertise? The thesis will argue that a reorientation of flood risk away from a status as the (multiple) object of these claims towards a status as an event in which a diverse variety of other things are brought into being (maps, futures, frequencies, anxieties, publics, geographies, things which are not necessarily very well understood as risk per se), will give rise to more productive and eventful questions. In the terminology of Isabelle Stengers, to risk is to create the possibility of bringing new things to life – the risking of floods seems to be constantly exciting such creativities.

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Hiller, Sheldon. "Desenvolvimento de material didático de apoio de astronomia para professores do segundo ciclo do ensino fundamental." Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/2879.

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Produto: Astronomia no II ciclo do ensino fundamental
Visando elaborar um material didático de apoio para atender as principais dificuldades dos professores no planejamento de suas aulas sobre Astronomia, foi realizado um estudo de trabalhos publicados por pesquisadores dessa disciplina, procurando identificar os principais obstáculos a serem transpostos no ensino dessa disciplina. A partir dos resultados obtidos no estudo, foi elaborado um material de apoio didático destinado ao ensino da Astronomia no segundo ciclo do Ensino Fundamental, para ser submetido à avaliação de uma amostra de professores da rede pública estadual do município de Passo Fundo (RS). Esse material pretende ser um referencial de consulta adicional para orientar o trabalho docente, proporcionando ao professor, tanto quanto possível, informações atualizadas, orientações pedagógicas que ampliam conhecimentos e alertam para concepções alternativas detectadas por outros autores, além de trazer sugestões de atividades práticas e de observação, ao abordar os conteúdos de Astronomia nessa fase de escolarização.
Aiming to develop a didactic material support to help to solve the main teachers´ difficulties when planning their Astronomy classes, we made a study about the papers published by researchers in this discipline, trying to identify the main obstacles to be overcome in the teaching of this discipline. From the results obtained in the study, we designed a didactic support material for the Astronomy teaching in the middle school to be submitted for the rating of a sample of teachers in the public schools in the city of Passo Fundo (RS). This material intends to be an additional consultation referential to guide the teaching work, providing to teacher, as much as possible, updated informations, educational guidelines that expand knowledge and point to alternative conceptions detected by other authors, besides to bring suggestions for practical activities and observation, when approaching Astronomy subjects in this school phase.

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Brolin, Nord Elin. "En studie av skador hos stolar från renässansen 1560-tal till biedermeier 1850-tal. : Ett arbete om sambandet mellan konstruktion, material och skadebild." Thesis, Linköpings universitet, Malmstens Linköpings universitet, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-150581.

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Through the selection of six representative typical Swedish chairs from each era, I present manufacturing techniques and how the craftsmanship has affected the style of the chairs over time. My main source material is the objects themselves. I chose to analyze the constructions and what can distinguish them apart in techniques, material choices, aesthetics and design. The main part of my work has been to find out what are the most occurring damages and its causes. Most damages from renaissance to biedermeier can be linked to the mortise joint. Through interviews with experienced conservators and with my own experiences as a cabinet maker and conservator, I discuss the concept of the ultimate chair design in terms of stability. I have come to the conclusion that the most solid chair is the eight to twelve framed chairs from the Renaissance, but the chair must be adapted to the intended use.

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Rimpiläinen, Sanna K. "Gathering, translating, enacting : a study of interdisciplinary research and development practices in Technology Enhanced Learning." Thesis, University of Stirling, 2012. http://hdl.handle.net/1893/5051.

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This is an ethnographic case-study of research and development practices taking place in an interdisciplinary project between education and computer sciences. The Ensemble-project, part of the Technology Enhanced Learning programme (2008-12), has studied case-based learning in a number of diverse settings in Higher Education, working to develop semantic technologies for supporting that learning. Focussing on one of the six research settings, the discipline of archaeology, the current study has had three purposes. By opening up to scrutiny the practices of research and development, it has firstly sought to understand how a shared research question is answered in practice when divergent research approaches are brought to bear upon it. Secondly, the study has followed the emergence of a piece of semantic technology through these practices. The third aim has been to assess the advantages and disadvantages of Actor-Network Theory (ANT) in studying unfolding, open-ended processes in real time. Through critical ethnographic participation, multiple ethnographic research methods, and by drawing on ANT as theoretical practice, the study has shown the precarious and unpredictable nature of research and development work, the political nature of research methods and how multiple realities can be produced using them, and the need for technology development to flexibly respond to changing circumstances. We have also seen the mutual adoption and extension of practices by the two strands of the project into each others’ domains, and how interdisciplinary tensions resolved, while they did not disappear, through pragmatic changes within the project. The study contributes to the interdisciplinary fields of Science and Technology Studies (STS) where studies on the ‘soft sciences’, such as education, are few, and a new field of Studies in Social Science and Humanities (SSH) which is emerging alongside and from within the STS. Interdisciplinary endeavours between fields pertaining largely to the natural and the social sciences respectively have not been studied commonly within either field.

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Stadler, João Paulo. "Análise de aspectos sociocientíficos em questões de química do Enem: subsídio para a elaboração de material didático para a formação cidadã." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1649.

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Acompanha: Manual didático: o emprego de aspectos sociocientíficos no ensino de química
Empregar sequências didáticas que apresentem aspectos sociocientíficos (ASC) pode ser uma estratégia que possibilite o desenvolvimento de competências e habilidades requeridas nos Parâmetros Curriculares Nacionais e na Matriz de Referência do Exame Nacional do Ensino Médio (Enem), em conjunto com aspectos científicos descritos para o ensino de Química. O emprego de ASC, inclusive em exames de larga escala como o Enem, prescinde da relevância do tema proposto, com o emprego de temas globais, por exemplo; da controvérsia, ou seja, um estímulo ao exercício de argumentação para elaboração e avaliação de hipóteses e tomada de decisão e a relação desses requisitos com os conteúdos científicos. Por meio da Análise de Conteúdo de Bardin, sobre questões de Ciências Naturais do Enem de 2009 a 2004, foi traçado um perfil da prova. Contrariamente ao esperado, o Enem apresenta caráter disciplinar e propedêutico, o que reflete os anseios das instituições de ensino superior que passaram a aceitá-lo como forma de ingresso. Em contraste, apresenta, também, poucas questões com que abordam ASC, o que pode causar a desmotivação em empregar a discussão desses aspectos em sala de aula. Desse modo, foi desenvolvido um material que apresenta orientações e exemplos para a realização de práticas que envolvam ASC pode ser um meio de difundir e estimular a utilização de práticas entre professores de Química de modo a discutir, possivelmente, reflexos nas características dos exames do Enem.
To use didactic sequences that consider socio-scientific issues (SSI) perspectives can be a strategy to develop the competences and abilities required on the National Standards (PCN) and on the High School National Exam (Enem) References Guide and the specific objective proposed to Chemistry teaching. The usage of SSI, including in wide-ranging evaluations, such as the Enem, requires the demands: topic relevance, with the usage of global themes for example; controversy, i.e. a stimulus to the development of argumentation to elaborate and evaluate hypothesis and make decision considering the established controversy; and the relation between the two requirements with the scientific knowledge. By using de Content Analysis proposed by Bardin on the question of the National Exam was possible to design an exam profile. In contrary to what was expect as a profile for the Enem, the exam presents a disciplinary and propaedeutic profile, reflecting the Universities needs for their admission process, which can result in an exam with only a few questions with SSI characteristics, demotivating its usage in classes. Therefore, the development of material that presents orientations and examples for SSI activities can be a way to spread the methodology to Chemistry teachers and stimulate its usage and. It can possibly cause chances in Enem characteristics.

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Wielage, B. "Schriftenreihe Werkstoffe und werkstofftechnische Anwendungen." Technische Universität Chemnitz, 2013. https://monarch.qucosa.de/id/qucosa%3A19884.

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Die Schriftenreihe „Werkstoffe und werkstofftechnische Anwendungen“ behandelt Themengebiete der Werkstoffwissenschaft und -technik, der Oberflächentechnik sowie deren industriellen Anwendungen. Es werden vorrangig aktuelle Forschungsergebnisse der Professuren Verbundwerkstoffe und Oberflächentechnik/Funktionswerkstoffe des Instituts für Werkstoffwissenschaft und Werkstofftechnik der TU Chemnitz vorgestellt. Weiterhin sind in der Schriftenreihe die Tagungsbände des jährlich am Institut stattfindenden „Werkstofftechnischen Kolloquium“ enthalten. Die einzelnen Bände beschäftigen sich mit den Forschungsgebieten Galvanische Metallabscheidung, Anodisieren, Thermisches und Kaltgas-Spritzen, Löten, Verbundwerkstoffe, Werkstoffverbunde, Wärmebehandlung, CVD-Beschichtungen/PVD-Beschichtungen, Simulation in der Beschichtungstechnik, Organisches Beschichten (Pulverbeschichten, Lackieren, Sol-Gel-Verfahren), Elektrochemisches Strukturieren, Thermomechanische Behandlung und Mechanische Werkstoffeigenschaften.
The book series „Werkstoffe und werkstofftechnische Anwendungen“ outlines up-to-date topics of material science and engineering, surface engineering as well as resulting industrial applications. Mainly, recent research results of the departments Composite Materials and Surface Engineering/Functional Materials of the Institute of Material Science and Engineering of Chemnitz University of Technology are presented. In addition, the book series includes the proceedings of the annual in-house conference “Werkstofftechnisches Kolloquium”. The separate volumes concentrate on the following fields of scientific research: Galvanised Coating, Anodising, Thermal and Cold Spraying, Soldering and Brazing, Composite Materials, Composite Structures, Thermal and Thermomechanical Treatment, CVD and PVD Coating, Simulation of Coating Processes, Organic coating (Powder Coating, Varnishing, Sol-Gel Processes), Electrochemical Structuring and Mechanical Material Properties.

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Aguiar, Leonardo De Conti Dias [UNESP]. "Um processo para utilizar a tecnologia de impressão 3D na construção de instrumentos didáticos para o ensino de Ciências." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/137894.

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Esta dissertação trata de uma pesquisa empírica sobre a utilização da tecnologia de impressão 3D na construção de instrumentos didáticos para o Ensino de Ciências. A crescente disponibilidade da tecnologia de impressão 3D abriu oportunidades de explorações em novas áreas, como a educação. Considerando as oportunidades de uso dessa tecnologia para a criação de materiais didáticos, este trabalho mostra como tal tecnologia pode ser utilizada por professores em formação e professores em serviço. Desta forma, um processo prático foi proposto e avaliado por meio de uma oficina. O processo consiste em 6 etapas distintas: identificação das necessidades de ensino por meio da seleção de conteúdos e conceitos científicos; desenvolvimento do plano de construção do instrumento didático desejado; elaboração de rascunhos considerando as dimensões físicas do objeto a ser construído; modelagem 3D do objeto utilizando softwares de desenho ou buscando por modelos prontos; preparação e impressão do modelo 3D na impressora 3D; utilização e avaliação do objeto real gerado. Esse processo foi apresentado e ensinado para alunos de licenciatura construírem instrumentos didáticos em uma oficina. A análise dos dados coletados nessa oficina por meio de observações, entrevistas e questionários mostram que: o processo pode guiar sobre quais são os passos a serem percorridos para construir instrumentos didáticos utilizando impressoras 3D; ocorrem situações estimuladoras ao aprendizado durante as construções; o uso desta tecnologia pode colaborar com o desenvolvimento da instrumentação para o Ensino de Ciências. Concluiu-se que, para se realizar o uso dessa tecnologia, é preciso que o professor desenvolva novas habilidades, como: planejar a construção de objetos levando em conta restrições técnicas das impressoras 3D, aprender a desenhar em softwares de modelagem 3D, preparar o modelo 3D para que a impressora 3D o construa (etapa denominada fatiamento) e a utilizar recursos informacionais para compartilhar e reutilizar modelos 3D de instrumentos didáticos criado por outras pessoas. Essa pesquisa contribui com o Ensino de Ciências, uma vez que: fornece uma forma sistemática para utilização da tecnologia de impressão 3D na educação; acrescenta novo conhecimento sobre o tema em uma área onde a literatura é escassa; abre oportunidades para que o conhecimento gerado por meio dos instrumentos didáticos construídos utilizando o processo proposto possa ser compartilhado com outros professores.
This thesis is an empirical research on the use of 3D printing technology in the construction of didactic tools for science teaching. The growing availability of 3D printing technology has opened exploration opportunities in new areas such as education. Considering the opportunities of this technology for the creation of teaching materials, this study shows how such technology can be used in the teacher education and by teachers in service. So, a practical process was proposed and evaluated by its use in a workshop. The process consists in 6 distinct stages: identification of educational needs through the selection of scientific content and concepts; development of the construction plan of the desired teaching tool; preparation of drafts considering the physical dimensions of the object to be built; 3D modeling of the object using drawing software or searching for 3D models created by others; preparation and printing of the 3D model in the 3D printer; use and evaluation of the real object generated. This process was presented and taught for undergraduate students for them build didactic tools during a practical workshop. The analysis of the collected data in this workshop through observations, interviews and questionnaires show that: the process can guide on which are the steps to be taken to build teaching tools using 3D printers; during the constructions occurs situations that stimulate the learning; the use of this technology can contribute to the development of instrumentation for Science Teaching. It was concluded that to do the use of this technology, it is required that the teacher develop new skills, such as planning the construction of objects taking into account technical constraints of 3D printers, learn to draw in 3D modeling software, prepare the 3D model to the 3D printer build it (step called slicing) and use IT resources to share and reuse 3D models of didactic tools created by others. This research contributes to the Teaching of Science, because: it provides a systematic way to use 3D printing technology in education; adds new knowledge on the subject in an area where the literature is scarce; It opens opportunities for knowledge generated through the teaching tools built using the proposed process can be shared with other teachers.

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Fiesinger-Lelièvre, Virginie. "La conservation du patrimoine de l'industrie textile en Alsace entre matérialité, immatérialité et virtualité : quels enjeux ? Quelles trajectoires ?" Thesis, Mulhouse, 2013. http://www.theses.fr/2013MULH6572.

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L'Alsace a été profondément marquée par l'industrie textile. Depuis près de deux siècles, cet héritage se compose, se transmet puis se démantèle avec les taux de croissance structurels et conjoncturels de l'économie et les crises industrielles. Puis, il se recompose de manières arbitraire, hasardeuse, voire opportune (au-delà de la rationalité plus ou moins assurée de stratégie(s) à court terme), pour former de ce fait un paysage culturel, scientifique, technique et industriel unique à chaque instant. Il est alors tout à fait légitime de se demander comment mettre en mémoire l'évolution de ce tissu industriel ans toute sa complexité ? Trois modes de conservation sont potentiellement exploitables : matérielle (concept de la rétro-présence à la néo-présence), immatérielle (concept de mémo-rétroconstruction) et virtuelle (concept d'aréel, favorisant clairement la prise de position sur des contenus matériels e immatériels à sauvegarder). Même si toutes ces possibilités coexistent, un problème reste entier : quelle trajectoire se dessine pour la conservation du patrimoine de l'industrie textile en Alsace ? La littérature sur la conservation du patrimoine industriel existante depuis les années 1970 tend à délaisser les relations d'interdépendances existantes entre ces trois modes de conservation. Le peu de résultats disponibles ne permet pas d'apprécier ce que pourrait nous apporter une bonne gestion de ces trois modes de conservation combinés. Ce travail de recherche s'est donné comme objectif de proposer des schémas possibles pour définir un nouveau modèle de conservation, basé sur l'exemple du patrimoine industriel textile en Alsace. La première partie de cette étude explique les processus qui ont permis le passage de l'industrie textile en Alsace au statut de patrimoine. Des choix guidés par des pouvoirs discrétionnaires, des logiques de conservation opposables, une discontinuité de ligne de conduite sur des courtes et longues périodes, de réoccupations parfois plus électoralistes que scientifiques, des désengagements d'hommes de responsabilités ou encore le manque de cohérence entre les acteurs ou les institutions... ont orienté la stratégie de la politique de conservation d'une région. Quel état des lieux peut-on dresser aujourd'hui grâce aux sources historiques ? Quels enjeux se profilent à court, moyen et long terme ? La seconde partie pose les mêmes questions, mais cette fois-ci en recherchant les réponses par l'exploitation exclusive de sources médiatiques. Elle interroge la pertinence des processus actuels de conservation du patrimoine de l'industrie textile, qu'ils soient matériel, immatériel ou virtuel avec un regard complémentaire à la première partie de cette étude, celui des journalistes, de la représentation publique et politique. Les sciences de l'information et de la communication apportent-elles de nouveaux horizons à la conservation de patrimoine ? Oui, mais pas seulement. Elles ne se limitent pas au rôle d'outils, mais nous verrons comment elles ont un rôle déterminant dans la reconstruction un patrimoine : elles se mettent collectivement en mouvement avec la société pour la définir, en exploitant tous les sens accumulés dans les sèmes liés au patrimoine industriel textile. Elles reconstituent ainsi une référence collective et formulent des hypothèses de transformation, d'adaptation et de projections futures. Nous verrons alors s'il est envisageable de leur réserver un rôle dans la conservation du patrimoine.La troisième partie met en évidence des convergences et les divergences des trois modes de conservation. Elle propose des solutions concrètes pour l'Alsace, puis des concepts transposables pour ouvrir ce nouveaux processus de conservation vers d'autres régions françaises ou pourquoi pas vers d'autre thématiques
Alsace has been profoundly marked by the textile industry. For two centuries, its textile heritage has experienced numerous fluctuations, rising and falling according to the structural and cyclical growth rate of the economy and to industrial crises. Fluctuations that, though completely random and uncontrollable (strategies, even short-term, cannot be implemented), have occurred in a timely manner, thus giving rise to constantly changing unique cultural, scientific, technical and industrial landscape.It is thus only right to wonder how the memory of the development of this industrial fabric can be preserved in all its complexity? There are three possible means of preservation: material (retro-presence to neo presence concept), immaterial (concept of memo-retroconstruction) and virtual (concept of what is "areal", clearly promoting position take-up on material and immaterial concepts to be protected). Even if all these possibilities exist side by side, one problem remains unanswered, namely what is the outlook for the preservation of the textile heritage in Alsace? The literature on preservation of industrial heritage available since the 1970s tends to overlook the existing relationships of interdependence between these three modes of preservation. The shortage of results does not allow us to appraise the potential offered by proper management of a combination of these three modes of preservation. This research work thus aims to propose some possible schemes to define a new preservation model, based on the example of the textile industrial heritage in Alsace. The first part of this study explains the processes that have allowed the textile industry in Alsace to accede to heritage status some 200 years ago. Choices guided by discretionary powers, opposable preservation logics, discontinuity in course of action over short and long periods alike, reclaiming more often oriented by lections rather than of a scientific nature, opting-out of those with responsibilities, not to mention the lack of coherence between players and institutions: these are all factors that will guide a Region's preservation policy strategy. What state of affairs can be drawn up today by historical sources? What is the outlook for the future? The second part asks the same questions, but this time seeks for the answers based only on media sources. It questions the pertinence of the current textile heritage preservation processes, material, immaterial and virtual alike, but from a viewpoint different from and complementary to the first part, namely the viewpoint of journalists and public and political contributors. Do communication sciences offer heritage reservation new horizons? Yes they do, but that is not all they offer. We shall see that, far from being mere tool, they play a decisive role in the reconstruction of a heritage, grouping themselves to move with society in order to define it by using all the meanings accumulated in the semes relating to the textile industrial heritage. Through this they form a collective reference, formulating hypotheses for future transformation, adaptation and projections. We shall then see whether it is possible for them to play a role in heritage preservation.The third part highlights the convergences and divergences of the three preservation modes. lt suggest concrete solutions for Alsace, followed by transposable concepts to extend these new preservation processes to other regions in France and, why not, to other areas

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Natale, Lorenzo. "Optimization of liquid flow rate distribution in etching modules through numerical simulationsand experiments." Thesis, KTH, Skolan för kemivetenskap (CHE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-212556.

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The purpose of this study was to simulate the liquid flow rate distribution in the etching modules and find the optimal setup in order to achieve a distribution as homogenous as possible. The commercial software Matlab 2015a has been employed for all the numerical simulations. The optimization has been carried out varying several parameters, i.e. spray cross sections of the nozzles, the oscillation parameters, the rotating angle of the nozzles within etching module 1 and the nozzle arrangement inside the modules. Furthermore, the optimization has been carried out separately along the two directions of the modules. The results achieved computationally have been validated via experimental procedures. During this study a specific experimental setup has been developed in order to be able to compare experimental and computational results. The validation process has shown that the computational method matches the experimental results to a good extent. The experimental liquid distribution in etching module 2 widely matches the simulations to a quantitative extent, while the one in etching module 1 provides the same qualitative but different quantitative results.

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Sandahl, Pär, and Cornelia Broman. "Förbättringskoncept stålfront : Cibes A5000 plattformshiss." Thesis, Högskolan i Gävle, Maskinteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36332.

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Stålfronter är Cibes mest eftertraktade alternativ av karm och dörrkombination till den offentliga marknaden såsom skolor och gallerior på grund av den robusta konstruktionen. Det förekommer dock problem med tillverkningseffektivitet, hantering och korrosion. Problematiken som uppstår har tydligt samband med karmens nuva-rande sammansvetsade konstruktion, samt att de inte är konstruerade att installeras i korrosiva miljöer. Genom förundersökningar hur dagens tillverkning ser ut och vad som önskas i konstruktionen ställdes ett kvalitetshus upp. Från kvalitetshuset utgavs, genom viktning, de viktigaste önskemålen som arbetet bör uppfylla. Det viktigaste var att konstrukt-ionen ska vara modulär, därefter önskades minskad variation och korrosionshärdiga alternativa material. Med hjälp av idégenerering togs olika koncept fram vilka alla förutom de mest lovande eliminerades. Det slutliga konceptet innebär en modulär karm där variationen av moduler uppgår till 39 för att bibehålla samma mängd karmvariationer som da-gens konstruktion, det vill säga 146 karmvariationer. Det togs även fram tre material för eventuell tillämpning i olika miljöer. Två av materialen har lägre pris än dagens (DC01 och DX51+Z275), dessutom har två av dem högre korrosionshärdig-het (DX51+Z275 och SS-EN 1.4404). Konceptets hållfasthet verifierades med håll-fasthetsberäkningar kompletterat med FE-analys. Det framtagna konceptet leder till effektivare tillverkningsprocess genom att färre produkter behöver lagras och hanteras. Materialpriserna och hållfastheten i koncep-tet är dock uppskattad till viss grad och behöver vidare verifieras.
Steel fronts is Cibes most sought after frame and door combination to the public market such as schools, malls etc. because of the robust construction. However, there are problems with manufacturing efficiency, handling, and corrosion. The problems that arise are significantly connected to the construction being delivered from a subcontractor as a complete welded sheet metal construction. In addition, they are not designed to be installed in corrosive environments. Through preliminary investigations how today's manufacturing takes place and what is desired in the construction a QFD was made. By weighting, the QFD presented the most important qualities which the work should fulfill. The most important quality was that the construction must be modular, followed by reduced variation and corrosion resistant alternatives. With the help of idea generation methods, different concepts were developed, which all but the most promising were to be eliminated. The final concept includes a modular frame where variations of modules is 39 to maintain the same amount as today´s construction with 146 frame variations. Three materials were also con-cluded for possible application in different environments. Two of the materials have a lower price than the material used today (DC01 and DX51+Z275), in addition, two of them have a higher corrosion resistance (DX51 + Z275 and SS-EN 1.4404). The strength of the concept was verified with strength analysis supplemented with FE analysis. The developed concept leads to more efficient manufacturing process in that fewer products need to be stored and handled. However, the material prices and the strength of the concept are appreciated to a certain extent and need to be further verified.

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Chandran, Sarath, and Mathews Jithin Abraham. "Simulation and Optimization of CNC controlled grinding processes : Analysis and simulation of automated robot finshing process." Thesis, Högskolan i Halmstad, Maskinteknisk produktframtagning (MTEK), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-30709.

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Products with complicated shapes require superior surface finish to perform the intended function. Despite significant developments in technology, finishing operations are still performed semi automatically/manually, relying on the skills of the machinist. The pressure to produce products at the best quality in the shortest lead time has made it highly inconvenient to depend on traditional methods. Thus, there is a rising need for automation which has become a resource to remain competitive in the manufacturing industry. Diminishing return of trading quality over time in finishing operations signifies the importance of having a pre-determined trajectory (tool path) that produces an optimum surface in the least possible machining time. Tool path optimization for finishing process considering tool kinematics is of relatively low importance in the present scenario. The available automation in grinding processes encompass around the dynamics of machining. In this paper we provide an overview of optimizing the tool path using evolutionary algorithms, considering the significance of process dynamics and kinematics. Process efficiency of the generated tool movements are studied based on the evaluation of relative importance of the finishing parameters. Surface quality is analysed using MATLAB and optimization is performed on account of peak to valley height. Surface removal characteristics are analysed based on process variables that have the most likely impact on surface finish. The research results indicated that tool path is the most significant parameter determining the surface quality of a finishing operation. The inter-dependency of parameters were also studied using Taguchi design of experiments. Possible combinations of various tool paths and tool influencing parameters are presented to realize a surface that exhibits lowest errors.
European Horizon 2020 Project SYMPLEXITY

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Svensson, Marcus. "Selection of a product component for topology optimization and additive manufacturing." Thesis, Jönköping University, JTH, Industriell produktutveckling, produktion och design, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-52791.

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This is a master thesis research on how to select the right components in a product, considering reducing the weight with topology optimization (TO) and adaption for additive manufacturing (AM). It is well established that manufacturing of complex structures can be achieved with AM, the possibility of integrating assembled components and improve features will therefore be investigated. The new component structure must still withstand the loads that it is subjected to during usage, to not permanently deform or break. In this research the studied product was a handheld Husqvarna chainsaw. Initially a feasibility study was conducted, where the product was disassembled and physically investigated for potential component cases. Additional knowledge was gathered with one semi structured interview per case, with experienced design engineers. Followed by one semi structured interview with AM experts, regarding available AM technique and similar material. Selection of case to continue with was based on the interviews information and Pughs decision matrix, with weighted criterions. TO were used for finding the optimal material distribution. The new component design was analyzed with linear finite element analysis to fulfill both the component and material stress requirements. Component orientation and support structure for AM was analyzed with computer aided engineering software. This resulted with integrating thirteen components for the engines cylinder into one component. The new design resulted in a weight reduction of 31%, while utilizing only 57% of the allowed stress limit. Also, the first 23 natural frequencies were improved with a new type of cooling fin structure, with an increased area of 15%. These results encourage the thesis workflow methodology usage for other products. In conclusion the established workflow of methods resulted in selecting a suitable case for integrating components with feature improvement and adaption of the new design with TO for AM, to reduce the weight.

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Albo, Zieme Louise, and Pontus Bergstedt. "A pre-study for functional coatings evaluated on light metals to be applied on a new HPDC Mg-alloy : Investigating tribological and thermophysical properties, as-cast and coated." Thesis, Jönköping University, JTH, Industriell produktutveckling, produktion och design, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-53096.

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Magnesium with two-thirds of the density compared to aluminium and one-quarter of steel, intrigues product developers and material scientists due to the light metal’s excellent combination of strength to weight ratio as well as their capability of being produced as a High Pressure Die Cast component compared to other ferrous or light metal alloys. However, a magnesium alloy inherits some concerning drawbacks, limiting the exploitation in structural applications and mechanical design such as automotive, heavy machinery and aerospace components. The need for a magnesium alloy that could withstand a sufficient amount of wear, temperature and corrosive environment, leads towards the investigation and evaluation of a suitable, functional coating as a solution to exploit the evident advantages a magnesium alloy exhibits. A substantial amount of research is required in order to reduce an existing knowledge gap that is the ongoing development in the search for a sufficient functional coating and adherence capability to the highly reactive substrate that is a magnesium alloy. This industrial master thesis is an early stage investigation to evaluate how the currently used aluminium substrate with an electrodeposited coating relate and compares to a heat-treated electroless deposited coating through tribological and thermophysical induced stresses. These properties are tested with proven industrial standard methods resulted in a comprehensive conclusion and discussion regarding the feasibility of applying the coating onto a commercial magnesium alloy closely related to the Mg-alloy developed by Husqvarna and thereby contributing to technological advances to the highly relevant topic within product development in materials engineering.

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Thinnes, Cyrille Christophe. "Chemical and biological studies on human oxygenases." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:455f2e65-f294-461b-b44f-cd53796b14a0.

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As depicted in Chapter I, 2-oxoglutarate- (2OG) dependent oxygenases are ubiquitous in living systems and display a wide range of cellular functions, spanning metabolism, transcription, and translation. Although functionally diverse, the 2OG oxygenases share a high degree of structural similarities between their catalytic sites. From a medicinal chemistry point of view, the combination of biological diversity and structural similarity presents a rather challenging task for the development of selective small molecules for functional studies in vivo. The non-selective metal chelator 8-hydroxyquinoline (8HQ) was used as a template for the generation of tool compound I for the KDM4 subfamily of histone demethylases via application of the Betti reaction. Structural analogue II was used as the corresponding negative control (Figure A). These compounds were characterised in vitro against a range of 2OG oxygenases and subsequently used for studies in cells. I displays selectivity for KDM4 and increases the level of the H3K9me3 histone mark in cells. It has an effect on the post-translational modification pattern of histone H3, but not other histones, and reduces the viability of lung cancer cells, but not normal lung cells, derived from the same patient. I also stabilises hypoxia-inducable factor HIF in cells via a mechanism which seems to be independent from prolyl hydroxylase inhibition. This work is described in Chapters II and III. The chemical biology research in epigenetics is complemented by qualitative analysis conducted in the social sciences at Said Business School. With a global view on how innovation occurs and may actively be fostered, Chapter IV focuses on the potential of epigenetics in drug discovery and how this process may actively be promoted within the framework of open innovation. Areas of focus include considerations of incremental and disruptive technology; how to claim, demarcate, and control the market; how knowledge brokering occurs; and insights about process, management, organisation, and culture of open innovation. In contrast to the open-skies approach adopted for the development of a tool compound in Chapters II and III, a focused-library approach was taken for the generation of a tool compound for the OGFOD1 ribosomal prolyl hydroxylase. The development of a suitable in vitro activity assay for OGFOD1 in Chapter V enabled the development of lead compound III in Chapter VI. III is selective for OGFOD1 against the structurally closely related prolyl hydroxylase PHD2.

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Bertaud, Alexandre. "Des guerriers au contact : transferts de technologie et évolutions tactiques en Europe occidentale du IIIème au Ier s. a.C." Thesis, Bordeaux 3, 2017. http://www.theses.fr/2017BOR30002.

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Durant les derniers siècles avant notre ère, les sociétés protohistoriques d’Europe occidentale sont successivement aux prises avec les grandes puissances méditerranéennes. Cette proximité a pu engendrer des modifications de l’armement qui sont souvent analysées dans une optique bilatérale, entre une population et Rome. Nous proposons une étude des interactions guerrières en Europe occidentale qui ne se contente pas d’analyser les échanges entre puissances méditerranéennes et populations protohistoriques mais qui prend en compte l’ensemble des armes échangées et qui essaye d’en déterminer les mécaniques. Après avoir introduit les grands groupes culturels présents dans la zone étudiée et discuté des principaux apports historiographiques, nous proposons de déterminer la place de l’armement dans les sociétés protohistoriques. En nous fondant sur une documentation abondante des contextes de découvertes fiables (environ 900), nous proposons d’analyser les dynamiques socio-culturelles inhérentes à chaque société dans leurs rapports à la guerre. Ce rapport des sociétés au fait guerrier est observé dans le temps : les modifications de ce rapport peuvent être liées à des changements propres aux groupes protohistoriques ou peuvent être mises en lien avec des bouleversements imposés par Rome. En analysant un corpus abondant d’armes (plus de 3500), nous pouvons mettre en évidence des choix particuliers à chaque groupe culturel mais également des emprunts et des adoptions. Les techniques de combats jouent un rôle essentiel dans les choix d’adopter ou non certaines armes. Cette analyse nous pousse à proposer de nouveaux moyens d’appréhender certaines problématiques depuis longtemps débattues comme le cas du glaive romain. Traiter des interactions guerrières en Europe occidentale implique d’analyser une grande variabilité de données. Ces analyses permettent de resituer plus précisément la place du fait guerrier dans les sociétés protohistoriques et de comprendre les moteurs des échanges d’armes. Elles permettent également de rendre compte et de relativiser l’impact de Rome dans le rapport des sociétés protohistoriques à la guerre ainsi que des techniques de combats des populations protohistoriques dans le système militaire romain
During the last centuries BC, late prehistorical societies were struggled against great Mediterranean Powers. With this proximity, some weapon modifications has been seen as a one way exchange: between one people and Rome. We want to study the warfare interactions in Western Europe in a large range of possibility by the analyses of all the warlike artefacts exchanged without focusing on the Mediterranean Powers against the prehistorical peoples. Through this we can understand the warfare interactions mechanisms. Introducing the main cultural groups and discussing the history of weaponry research, we propose to understand the place of the weapon in the late prehistorical societies. Through the trustworthy discovery contexts (around 900), we want to understand the socio-cultural dynamics of each group in relation to warfare behavior. This relation will be seen during the long time to approach the modifications that are strictly from the prehistorical people or that are deliberate conducted by Rome. Through analyses of several weapons (more than 3500), we can highlight the choices of each cultural group and the adoptions. The fighting techniques are essential in the choices to adopt some weapons. This analyses leads us to propose some new ways to think about ancient issues as the roman gladius. We must use several kind of data to apprehend the warfare interaction in Western Europe. These analyses are useful to understand the warlike behavior in the societies and so the mechanics of weapon exchanges. They also permit to realize and relativize the impact of Rome, as in the rapport of the prehistorical societies to warfare, as the fighting techniques in the roman military system

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Blake, Greyory. "Good Game." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5377.

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This thesis and its corresponding art installation, Lessons from Ziggy, attempts to deconstruct the variables prevalent within several complex systems, analyze their transformations, and propose a methodology for reasserting the soap box within the display pedestal. In this text, there are several key and specific examples of the transformation of various signifiers (i.e. media-bred fear’s transformation into a political tactic of surveillance, contemporary freneticism’s transformation into complacency, and community’s transformation into nationalism as a state weapon). In this essay, all of these concepts are contextualized within the exponential growth of new technologies. That is to say, all of these semiotic developments must be framed within the post-Internet sphere.

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Kao, Chang-Chih, and 高長志. "A Study on the Effects of Implementing Mathematics-Science-Technology（MST） Curriculum Model to Technology Education in Junior High Schools." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/53356123446172306651.

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碩士
國立臺灣師範大學
工業科技教育研究所
92
The main purpose of this study was to compare the effects of Mathematics-Science-Technology（MST）Curriculum Model with Traditional Curriculum Model on technology learning achievements and problem-solving behaviors of junior high school students. In order to achieve the purposes, a six-week segment of the technology curriculum for junior high schools was taught to four intact classes. Two classes were randomly assigned to experiment group, MST Curriculum Model while the other to Traditional Instruction. MST Learning Activities were developed by the researcher according to the related references and the MST approach. A pre- and post-test quasi-experimental design was employed to measure the differences of students’ achievements under the conditions of two different teaching approaches. The major instruments used to assess students’ achievements in this study were the Heppner and Petersen’s Problem Solving Inventory, the student learning portfolio in construction technology activity and construction technology achievement test. The major results of this research were as follows： 1. MST Curriculum Model could improve students’ construction technology achievement test scores in junior high schools. 2. MST Curriculum Model has positive effects on students’ Problem Solving Inventory scores. 3. MST Curriculum Model was suitable for male and female students to learn Construction Technology.

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郭政源. "The influence of mathematics,science and technology(MST)integrated teaching model on junior high school students' performances in the fields of nature science and technology education." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/85231522865136191291.

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博士
國立彰化師範大學
工業教育與技術學系
95
The research aimed to analyze junior high school students’ learning performances in the fields of nature science and technology education and math by means of the implementation of Mathematics, Science and Technology (MST) integrated teaching model. The teaching materials utilized in MST integrated teaching model were based on the fields of nature science and technology education and math for students in the first semester of the ninth grade. Thematic integrated instruction was used to present teaching, and water rockets, egg protectors and electric cranes were included as the themes. The research adopted nonequivalent pretest-posttest control group quasi-experimental research. The experimental group also used portfolios to record the complete learning process, which intended to confirm the validity of the experiment. There were thirty-six students in both experimental and control groups. The implement- ation time covered three periods a week, sixteen weeks, and forty-eight periods in total. The methods of statistic analysis include frequency distribution, MANCOVA and Pearson's product moment correlation. The results of the research were as follows: 1. MST integrated teaching model could enhance students’ learning cognitions in the field of nature science and technology education. 2. MST integrated teaching model could enhance students’ learning attitude in the field of nature science and technology education. 3. Learning attitude were highly related to learning cognitions and exam achievements. Besides, learning strategies were key to learning attitude. 4. In students’ learning portfolios, their performance on science exploration was the best while the performance on mathematics analysis was the worst. It may relate to the frameworks of teaching materials and portfolios. 5. Students’ performance on the portfolios was affected by their learning achievements in each unit as well as their multiple abilities. 6. The learning achievements carried out before teaching had impact on learning cognitions, exam achievements and learning motivations for students taking part in MST integrated teaching model. 7. Most students were satisfied with MST integrated teaching model. However, high-achievement students were not pleased with their personal learning results while low-achievement students were not contented with the teaching contents. 8. In investigating students’ satisfaction toward teaching, “interpersonal relationship” was mostly affected by personal factors while students were fairly contented with group competitions.

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Webster, Colin. "Technology and/as Theory: Material Thinking in Ancient Science and Medicine." Thesis, 2014. https://doi.org/10.7916/D8J101B7.

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Multiple natural philosophers in antiquity proposed that nature possessed considerable technical skill. Yet, the specific conceptual implications of this assertion were quite different in fourth century BCE Athens--with its pots, bronze tools and cisterns--than in second century CE Rome--where large-scale aqueducts, elaborate water machines and extensive glassworks were commonplace. This dissertation assesses the impact that these different technological environments had on philosophical and scientific theories. In short, it argues that contemporary technologies shaped ancient philosophers' physical assumptions by providing cognitive tools with which to understand natural phenomena. As a result, as technologies evolved--even in relatively modest ways--so too did conceptual models of the natural world. To explore these assertions, this dissertation focuses on two main fields of explanation, the vascular system and vision, and includes investigations of such technologies as pipes, pumps, mirrors, wax tablets, diagrams and experimental apparatuses. It demonstrates the ways in which scientific theorists use the specific material technologies around them as heuristics to conceptualize physical processes.

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Tseng, Chien-Hsun, and 曾建勳. "The Effects of Computerized MST (Mathematics, Science, and Technology) Interdisciplinary Curricula on Technological Literacy and Technological Creativity for Elementary Students." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/38167233606354729484.

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博士
國立高雄師範大學
工業科技教育學系
97
Technological literacy and technological creativity are two keys to preparing elementary students for everyday life. This study developed Computerized MST Interdisciplinary Curricula(C-MST) while developing the technological literacy and creativity of pupils with C-MST. The main difference between C-MST and MST lies in computerized mindtools that are designed to assist students in learning with technology as well as for constructing anchored knowledge and systematic problem-solving strategies. C-MST is based on the literacy indicators of mathematics, science and technology, combines the activities of “designing and doing” in technological education, and inspires students to transfer mathematical and scientific concepts to creative designs and pragmatic performances. This study adopted a quasi-experimental approach to assess the effects of C-MST on the performances of sixth-graders in terms of technological literacy and creativity. Seventy-two sixth-graders from five schools were divided between two groups, the “C-MST system-supported group” and the “self-learning group”. The experiment proceeded for ten weeks, with two main themes being carried out in 28 classes. The final effective sample comprised 48 students. With the “self-learning group” primarily focused on project-based learning, it was hoped that students would avail themselves of technological tools and internet resources to implement problem-solving strategies. On the other hand, the “C-MST group”, was provided with computerized anchored courses and systematic mindtools to assist the students in their critical and creative thinking. The study yielded the following results. First, integration among elementary mathematics, science and technology courses can establish systematic support and connections between regular and project-based learning. Second, C-MST significantly enhances the technological literacy and creativity of elementary students. Third, by integrating the program design, literacy cultivation and assessment indicators, C-MST sees students in the C-MST system-supported group outperform those in the self-learning group in terms of technological literacy and technological creativity. Fourth, a significant correlation exists between student technological literacy and technological creativity. As a result, through literacy assessments and feedback gathered during the learning process, students are expected to exhibit improved technological creativity. Finally, a significant correlation exists between student technological application attitude and their technological literacy. This correlation demonstrates learning with technology should emphasize emotional factors. This study thus made three suggestions. First, besides performances in technological literacy and creativity, C-MST should also pay attention to the positive development of student emotional propensity. Second, it is necessary to analyze different literacy developments among different students to enable the establishment of a more flexible C-MST Interdisciplinary Curricula scaffolding system. Finally, to proceed with elementary Science and Technology courses, it was recommended that technological literacy should be adopted as an indicator when coordinating interdisciplinary curricula programs. Such programs should combine technological tools and provide to enable a long-term assessment of technological interdisciplinary learning and its effects. This solid base of mathematical and scientific learning would distinguish the course features of Science and Technology, and enhance the development of the technological literacy and creativity of students.

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lin, Keng-Hsi, and 林耿希. "A Study of Key Success Factors on Material Management in Chung-Shan Institute of Science and Technology─FAHP Approach." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/c4tc73.

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碩士
中原大學
企業管理研究所
103
Material Management is important to maintain the operation of an organization from the aspects of property/assets, cost and accounting. For a research and development (R&D) institution, material management is more than just ordering, application, receiving and consumption with SOP and standard ingredients. This study intended to find out the key factors which increase performance of the case company and avoid deficiencies from bad material management system through literature reviews, expert interviews and current status analysis of the case company. The results showed that the weight of production planning and capacity of management reached 47.9%, which should be the top priority for the material management of R&D institutions. One-time purchasing, short-time demand, high uncertainty and high complexity are characteristics of R&D materials which result in the difficulty for a company in striking a balance between decreasing the carrying cost of material and avoid the impact from diminishing manufacturing sources and material shortages (DMSMS),and more difficulty in demand forcasting and material requirement planning than general production industry. Therefore, it is required to master the accuracy of demand forcasting, capacity of material requirement planning and to establish capacity of standard ingredient; as a result, material management performance of R&D institutions could be effectively increased.

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Wei, Li Chia, and 李佳葳. "Content Analysis and The Use of the Current Situation of Science Education and Technology Aids Material of Elementary School." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/14720493539403080860.

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碩士
國立臺中教育大學
科學應用與推廣學系科學教育碩士班
103
The purpose of this study was to explore the content and the use of aid matericals in the field of elementary Science and Technology in Grade 1-9 Curriculum. This study was conducted through content analysis, along with interviews with the material users.Analytic categories were designed to analyze different versions of aid materials used by 4th graders and 6rd graders in the elementary level, and to focus mainly on what percentage of different contents are, and in what forms the contents are mostly presented. The major findings included: (1) the most commonly-seen contents of the aid materials are “Keys to the Textbook”(48.8%) , “Exercise” (25.2%), “Extensive Learning”(14.6%), and “Highlighters of the Text”(7.2%). Among all the versions, three versions are found to have significantly different focuses upon “ Experimental Practice”, “Extensive Learning”, and “Exercise.” (2) as for the presenting forms, “Guideline for Preview” is chiefly by means of points of words listed to demonstrate each key point to readers. “Keys to the Textbook” mainly in the form of Q&A- questions and answers; “Highlighters of the Text” especially printed in boldface, light color, or in the brackets; “Extensive Learning”is more likely to be read in supplementary reading, experiements, or essay on a specific topic; “Exercise” is mostly in the multiple choices or blank-filling test questions with fixed answers. Plus, it is shown that some versions prefer to present materials in the comic forms to motivate students, and others contain unclear procedures of experiments, which may confuse students. (3) regarding their functions, for elementary school teachers, the aid materials are supplements to the textbooks; for cram school teachers, they are the main teaching materials; for elementary students, they are chiefly for review; for the parents, they work as an aid to monitor their children’s learning effect. Even though the aid materials play an important role in students’ self-learning, they also contribute to restrict students’ critical thinking and creativity. Thus, further improvements are recommended, such as adding more motivation-provoking exercise questions, more open-ended ones, or more experiments’ material package.

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Wen-Kuang, Cheng, and 鄭文光. "Content Analysis on astronomy Material of Natural Science and Living technology Textbooks in The Elementary School : Using "Moon Unit" as an Exampler." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/13659148220074827667.

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碩士
國立屏東師範學院
數理教育研究所
91
The main purpose of this study was to explore perspectives, teachers and students, of “Natural Science and Living Technology” textbooks by questionnaires, data of deep interview, comparison between different textbooks of current use, to analyze suitability of various categories, expect to be a reference for editors and teachers. The objects were 65 science teachers and 248 students in 4 grade. The devices were textbooks of “Natural Science and Living Technology”, and “The questionnaire of Moon Units”, teacher and student edition respectively, and data of deep interview for vague opinions. The major findings were： The textbooks of “Natural Science and Living Technology” in elementary school was satisfied most teachers, about 60% through 84.5%, but still have some problems to be solved by editors of current editions as below: 1. Structure：The prior knowledge of “Moon Unit” should be taught in advance. 2. Content：The materials of about lunar calendar, for example the date of new moon and full moon, were wrong; About the observation of Moon should orient to south led misconceptions. 3. Designing：Too long to observe “Moon Phases”. Too complex to manipulate. 4. Pictures and words：Scientific terms were undefined; pictures and words were inconsistent; words arrangements were at fault. 5. Arrangement：Some layouts were inappropriate.

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Palefau, Tevita Hala. "Perspectives on scientific and technological literacy in Tonga : moving forward in the 21st century." 2005. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=232584&T=F.

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48

Chen, Hsien-Tung, and 陳顯童. "Green constructs material take in dispose place operate administer and e melt of research- - - As si wei science and technology construct admixture processing place for example." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/zs65g9.

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碩士
國立中央大學
土木工程學系碩士在職專班
97
Is cooperate with country future significant infrastructure, As accord with save energy minus carbon, National resource take advantage of, Environment child care and forever continues develop of direction, Government will active push cubic meter of earth and stone many entity again take advantage of, Is like fill up sea build land, Cubic meter of earth and stone again takes advantage of wait for method, Avoids environment contamination breakage, And settles riverway or fleet ''s clear silt wait for problem. From soil stone or constructs junk for source''s point of view look, If can at work address now field decrement, And at appropriately disposal in work area, Again take advantage of, Not only can decrease transport consumptive energy sources, Decreases carbon dioxide emission, Towards environment child care and public safety also have face help benefit, Therefore pushes construct remain cubic meter of earth and stone with junk decrement and again take advantage of is processing place forever continue run developing aim. As management two constructs admixture processing place''s experience, To constructs admixture to bring forth quantity ''s push estimate, Constructs admixture how classification selection, Disposes machinery equipment use status, Rebirth bone timber ''s zhi Cheng with quality will control inspect, At operate course, Will be above homework make each relative to process flow chart, Comes add with discuss maybe face go ''s environmental impact affect point of, And as ISO14000 environment administration system to environment considerations microbus authenticate make to environmental impact affect dot and as data melt express, Evident appears to environment hazards take place frequence, V Works techniques of handling difficult easily degree, Takes place cost, Overcomes affect society image extent ''s difficult easily, Will result in processing place safety sanitary problem wait for status one by one as calamity affect range, Property loss extent, Personnel hurts extent, Shuts down number of days impact affect severity Ming Dynasty, And difference as C= F × S × M mathematical formula reckons come out front eleven is significant to environmental impact conspicuous person for underlying improvement disposal. And grasp zhu processing place operates administer basic process flow chart and institutional construct under, One by one will be significant environmental impact target at accord with law compass, Quantification, Data melts ''s convert for improve aim, Seeks come out cooperate with at present manpower, Financial resources, Job range, Can acquire ''s improve condition or means under source, So this researches chief as management processing place experience really tusk on, And boots ISO14000 under environmental administration system concept, Seeks come out at operate course to environmental impact affect dot of administer mode institutional establish, Expects to each processing place at operate course environment maybe suffer impact, Supplies a ge in advance prevention administration measure, Ands furthur strengthen with improve environment and dispose behind quality''s referrence, Impel domestic will construct admixture dispose and again use of aim can effective really push exhibition.

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49

Yih-Chang, Gu, and 辜憶昌. "The Study of the Concept Learning in Science and Living Technology in 6th grade of elementary school with Performance Teaching─ take the material change as an example." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/f4b9w5.

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碩士
臺北市立教育大學
科學教育研究所
94
The purposes of the research lied in inducting Performance Teaching to Science and Living Technology teaching activities in 6th grade of elementary school, arranging the suitable situation, and providing the students more opportunities of actual operation. The students designed, operated experiments, and observed results without instructions given by teacher, which demonstrated Performance Assessment─ performance studying in teaching activities. The students were expected to obtain not only the scientific concept but also scientific process skills in learning. The goals of this research were (1) to investigate the influence of the concept learning in science and living technology in 6th grade of elementary school with performance teaching; (2) To investigate the influence of the scientific process skills in science and living technology in 6th grade of elementary school with performance teaching; (3) To investigate the difference of different gender in the concept learning in science and living technology in 6th grade of elementary school. The research adapted a quasi-experimental design. The subjects were two classes, one experimental group and the control group. Another experimental group undertook eight weeks activities of “Performance Teaching”. The curriculum was “the Material Change”. The control group undertook normal teaching activities. A “the Test of Concept Learning of Science and Living Technology” was taken for students before and after the treatment. The statistical analysis of research adopted ANCOVA (Analysis of Covariance), the covariate variable was the pretest scores, the independent variable was the posttest scores, and to investigate the influence of the concept learning in Science and Living Technology in 6th grade of elementary school with performance was teaching. At the same time, according to the students’ scores in “Performance Assessment”, to investigate that if the “Performance Teaching” promoted students’ learning of scientific process skills. The results were as follows: (1) The scores of posttest in the “Test of Concept Learning of Science and Living Technology” of the students who undertook the Performance Teaching were significantly higher than the students who undertook the normal scientific teaching course. However, the scores in different gender were not different; (2) The average scores of posttest in “Performance Assessment“ of the students who undertook the Performance Teaching were higher than average scores of the pretest in scientific process skills learning. According to the results, the followings can be concluded: (1) The Performance Teaching was a positive promotion for 6th grade in the Concept Learning and the Scientific Process Skills in Science and Living Technology; (2) There was not significantly different between boys and girls in 6th grade in the Concept Learning in Science and Living Technology. The following suggestions were offered for the teachers in Science and Living Technology: (1) the curriculum of Science and Living Technology should take the spirit of “Performance Assessment” into the teaching activities. (2) The teachers in Science and Living Technology should offer students the opportunities of operation and thinking, and there by acting as the Counselors who guide students to think positively and learn initiatively. (3) The teacher should raise the inquiry abilities of the student, cooperative learning, obtaining the scientific intelligence, and all kinds of process skills.

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50

Dong, Yu 1977. "Multi-scale effects on deformation mechanisms of polymer nanocomposites : experimental characterisation and numerical study." 2008. http://hdl.handle.net/2292/2642.

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In order to make much stiffer, light weight and high performance material products, polymer nanocomposites play an emerging role in the material innovation. Unlike other thermoplastics, polymer nanocomposites are fabricated by introducing a small amount of solid nano-scale fillers (normally less than 5 wt%) such as nanoclay, carbon nanotubes or nanofibres into a plastic resin to dramatically enhance its stiffness, strength and thermal properties. The difference between nanocomposites and conventional fibre composites is that the added fillers are extremely small, only one-millionth of a millimetre thick, and provide a much larger interface area per unit volume for greatly improving the interfacial bonding effect between nanofillers and the polymer matrix. More importantly, polypropylene (PP)/clay nanocomposites have quite a high potential to form such innovative materials and replace the conventional plastics in many automotive and packaging applications. Nevertheless, the growth of PP/clay nanocomposites faces an obstacle of hydrophobic polymer’s low interactions with hydrophilic clay. Maleic anhydride (MA) grafted PP (MAPP), commonly used as a compatibiliser, has been proven to facilitate a good clay dispersion within the PP matrix through its functionalised MA groups. But despite the great attention from the manufacturers and researchers in recent years,commercial PP/clay nanocomposites with reliable material properties are still limited in availability. The major problem stems from the complex influences of the material selection and processing methods. The present work developed a comprehensive approach from the material formulation and processing, experimental characterisation to the numerical modelling of PP/clay nanocomposites based on the finite element analysis (FEA) of micro/nanostructures. Initially, effects of the material selection including the clay type and content, MAPP content and PP matrix viscosity were investigated for the mechanical property enhancement of PP/clay nanocomposites. These nanocomposites were prepared using twin screw extrusion and injection moulding processes with a well-known Taguchi design of experiments (DoE) method in order to statistically detect the significant factors for influencing their mechanical properties. The preferred material formulations were then determined by Pareto analysis of variance (ANOVA) with the technical and economic considerations. The fundamental material characterisation was also conducted on those formulated nanocomposites using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA). Overall mechanical properties of neat PP and corresponding nanocomposites were determined by the general tensile, flexural and impact tests. Finally, computational models were established by implementing both the representative volume element (RVE) technique and innovative object-oriented finite element (OOF) analysis to predict the tensile moduli of PP/clay nanocomposites in comparison to the experimental data and available composites theoretical models.
This research work was sponsored by Foundation for Research, Science and Technology (FRST), New Zealand under the grant #UOAX 0406 and financially supported by Tertiary Education Commission (TEC), New Zealand through Bright Future Top Achiever Doctoral Scholarship to Yu Dong.

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