Дисертації з теми "Printing method"
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1
Kanani, Chirantan. "Cell Printing: A novel method to seed cells onto biological scaffolds." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/332.
Анотація:
Bioprinting, defined as depositing cells, extracellular matrices and other biologically relevant materials in user-defined patterns to build tissue constructs de novo or to build upon pre-fabricated scaffolds, is among one of the most promising techniques in tissue engineering. Among the various technologies used for Bioprinting, pressure driven systems are most conducive to preserving cell viability. Herein, we explore the abilities of a novel bioprinter - Digilab, Inc.'s prototype cell printer. The prototype cell printer (Digilab Inc., Holliston, MA) is an automated liquid handling device capable of delivering cell suspension in user-defined patterns onto standard cell culture substrates or custom-designed scaffolds. In this work, the feasibility of using the cell printer to deliver cell suspensions to biological sutures was explored. Cell therapy using stem cells of various types shows promise to aid healing and regeneration in various ailments, including heart failure. Recent evidence suggests that delivering bone-marrow derived mesenchymal stem cells to the infarcted heart reduces infarct size and improves ventricular performance. Current cell delivery systems, however, have critical limitations such as inefficient cell retention, poor survival, and lack of targeted localization. Our laboratories have developed a method to produce discrete fibrin microthreads that can be bundled to form a suture and attached to a needle. These sutures can then be seeded with bone-marrow derived mesenchymal stem cells to deliver these cells to a precise location within the heart wall, both in terms of depth and surface localization. The efficiency of the process of seeding cells onto fibrin thread bundles (sutures) has previously been shown to be 11.8 ± 3.9 %, suggesting that 88% of the cells in suspension are not used. Considering that the proposed cell-therapy model for treatment of myocardial infarction contemplates use of autologous bone-marrow derived stem cells, an improvement in the efficiency of seeding cells onto the fibrin sutures is highly desirable. The feasibility of using Digilab's prototype cell printer to deliver concentrated cell suspension containing human mesenchymal stem cells (hMSCs) directly onto a fibrin thread bundle was explored in this work, in order to determine if this technology could be adapted to seed cells onto such biological sutures. First the effect of the printing process on the viability of hMSCs was assessed by comparing to cells dispensed manually using a hand-held pipette. The viability of hMSCs 24 hours post-dispensing using the cell printer was found to be 90.9 ± 4.0 % and by manual pipetting was 90.6 ± 8.2 % (p = ns). Thereafter a special bioreactor assembly composed of sterilizable Delrin plastic and stainless steel pins was designed to mount fibrin thread bundles onto the deck of the cell printer, to deliver a suspension containing hMSCs on the bundles. Highly targeted delivery of cell suspension directly onto fibrin thread bundles (average diameter 310 µm) was achieved with the bundle suspended in mid-air horizontally parallel to the printer's deck mounted on the bioreactor assembly. To compare seeding efficiency, fibrin thread bundles were simultaneously seeded with hMSCs using either the cell printer or the current method (tube-rotator method) and incubated for 24 hours. Seeded thread bundles were visualized using confocal microscopy and the number of cells per unit length of the bundle was determined for each group. The average seeding efficiency with the tube rotator method was 7.0 ± 0.03 % while the cell printer was 3.46 ± 2.24% (p = ns). In conclusion, the cell printer was found to handle cells as gently as manual pipetting, preserve their viability, with the added abilities to dispense cells in user-defined patterns in an automated manner. With further development, such as localized temperature, gas and humidity control on the cell printer's deck to aid cell survival, the seeding efficiency is likely to improve. The feasibility of using this automated liquid handling technology to deliver cells to biological scaffolds in specified patterns to develop vehicles for cell therapy was shown in this study. Seeding other cell types on other scaffolds along with selectively loading them with growth factors or multiple cell types can also be considered. In sum, the cell printer shows considerable potential to develop novel vehicles for cell therapy. It empowers researchers with a supervision-free, gentle, patterned cell dispensing technique while preserving cell viability and a sterile environment. Looking forward, de novo biofabrication of tissue replicates on a small scale using the cell printer to dispense cells, extracellular matrices, and growth factors in different combinations is a very realistic possibility.
2
Holeman, Tara. "The Systematic Approach to Microplotter Printing of Perovskite Precursors." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1534795066623052.
3
Bishop, Craig, Ian Armstrong, and Rolando Navarette. "A Novel Method for 3D Printing High Conductivity Alloys for UHF Applications." International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/577400.
Анотація:
ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CATraditional approaches to constructing 3D structural electronics with conductive and dielectric materials include ink-jet printed, silver-bearing ink and fine copper wire meshes. One approach combines stereo-lithographic 3D-printed photo-polymers with direct-printed silver-bearing conductive inks. Results have shown 3D conductive structures with conductivities in the range 2x10⁶ to 1x10⁷ S/m using annealing temperatures ranging from 110°C to 150°C for 10 to 15 minutes. However, the stereo-lithographic approach suffers from the high cost of the printer and structural deformation during annealing. This paper presents a new method for 3d printing high conductivity metal alloys using consumer-grade 3D printer. The design and construction of the necessary modification will be presented in addition to the new 3D design process. The method yields metal structures with expected conductivities exceeding 2.6x10⁶ S/m. The process is performed without an annealing step, so the polymeric structural material is not exposed to high temperatures for any prolonged time. A UHF ISM band antenna is constructed for an RFID application using this method, the antenna performance is measured, and the results are compared simulations in Ansys HFSS. This new method can reduce total cost, and several low melting-point alloys could raise the conductivity.
4
Latanision, Ivan M. "A comparison between the staggered position one-angle screening and the multi-angle screening method in terms of misregistration when printing process color on newsprint /." Online version of thesis, 1992. http://hdl.handle.net/1850/11251.
5
Fuller, Sawyer Buckminster 1977. "A fast flexible ink-jet printing method for patterning networks of neurons in culture." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/89393.
6
Ottesen, Vegar. "Bacterial Microarrays by Microcontact Printing : Development of a Method for Immobilizing Live Bacteria on Microarrays." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for fysikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26120.
Анотація:
Traditional microbiological experimental methods generally reveal population-wide statistics and are not capable of revealing variations between individual cells. In an effort to address this, a cheap, quick and easy means of producing micro-arrays with live bacteria immobilized on the array's coordinates has been developed. To achieve this, microcontact printing (µCP) was used to print circular PD ``islands'' onto a surface coated with either PEG or PVA. The bacteria, <i>Pseudomonas putida</i> KT2440 were successfully immobilized on approximately 97% of the printed islands, depending on island diameter. A LIVE/DEAD® <i>Bac</i>Light™ assay revealed that over 99% of the immobilized bacteria survive the immobilization on the array. Qualitative analysis suggests the bacteria survive for hours after immobilization, provided nutrients are available. The developed method may, by revising the stamp design and/or choice of elastomer, likely be optimized to immobilize only one bacterium per array coordinate.
7
McMaster, Rebecca J. "A simple method towards 3D-printing and crosslinking partially hydrolysed poly(2-ethyl-2-oxazoline)." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/109910/1/Rebecca_McMaster_Thesis.pdf.
Анотація:
The two projects covered by this thesis represent advancements in the field of biofabrication. The first project was a proof-of-principle study focused on the development of a new polymer ink for 3D-printing. Scaffold structures were printed with a hydrophilic polymer and characterized to determine optimum printing parameters. Crosslinking strategies to create hydrogels with properties similar to human tissue were also explored. The second project was focused towards developing adipose grafts for soft tissue defects. Microfibre scaffolds were designed and 3D-printed with pores suitably sized for seeding with aggregates of human stem cells, and differentiated into fat tissue under in vitro conditions.
8
Yuan, Kaiwen. "A 3d printing and moulding method of the fabrication of a miniature voice coil motor actuator." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54008.
Анотація:
The goal of this project is to apply 3D printing and moulding (3DPM) methods for the fabrication of a miniature magnetic actuator for optical image stabilization (OIS) applications. Polydimethylsiloxane (PDMS) and strontium ferrite (SrFe) nano powder were used as the main structural material. Young’s modulus and the magnetization of the material with SrFe-doping ratios ranging from 20% to 60% by weight were characterized. The actuator, consisting of four coils, an actuating plate, and a base supporter was assembled and tested with a Laser Doppler Velocimetry (LDV) system. A tilting angle of 0.6º was achieved with the application of 500 mA (50 turns/9 mm long coils). A Taguchi’s orthogonal experimental design was used in the finite element analysis (FEA) simulation to examine the effect of dimension variations on the eigenfrequencies. Frequency response of the actuator was characterized and the experimental results matched with the simulation results between 1 and 450 Hz showing less than 5% errors. A series of replica experiments were also performed and analyzed.Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate
9
Özkol, Emre [Verfasser]. "Evaluation of the direct inkjet printing method for the fabrication of three-dimensional ceramic components / Emre Özkol." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1027765947/34.
10
Al-Khudary, Nadine. "Material thermal conductivity measurement by the 3-omega method : application to polymers characterization using inkjet printing technology." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10135/document.
Анотація:
Dans le domaine de l'électronique souple, les substrats flexibles à base de polymères sont de plus en plus utilisés. Si dans les prochaines années, les structures de propagation mises en œuvre sur ce type de substrat véhiculent une puissance, alors la connaissance de la conductivité thermique de ces matériaux est essentielle. Dans ce travail, nous mesurons la conductivité thermique de matériaux de type polymère en utilisant la méthode 3 omégas. Des mesures ont été effectuées sur du polydiméthylsiloxane (PDMS). Un procédé technologique particulier est utilisé pour la fabrication des échantillons de PDMS. De ce fait, les conducteurs métalliques sont encapsulés dans le polymère et non en surface de ce dernier. Mais cela est sans conséquence sur les valeurs de conductivité thermique mesurées. Les procédés photolithographiques utilisés traditionnellement pour réaliser les lignes métalliques sont coûteux et longs. Par conséquent, nous proposons pour ce type de matériaux une méthode alternative pour la réalisation des lignes conductrices grâce à la technologie d'impression par jet d'encre. Les conductivités thermiques du polyimide et polyétheréthercétone ont été mesurées en utilisant la méthode 3omega combinée à la technologie d'impression par jet d'encre.Des simulations numériques basées sur la méthode des éléments finis ont été développées au cours de la thèse. Les mesures expérimentales obtenues sont comparées aux résultats obtenus par une solution analytique et par notre modélisation numérique.Ainsi durant cette thèse nous montrons avec succès la possibilité d'utiliser la technologie d'impression jet d'encre pour mesurer la conductivité thermique d'un substrat soupleThe characterization of polymers is gaining a great attention as they are one of the main constituents of future flexible or organic electronics. Given the fact that thermal management is an important issue in the frame work of flexible electronics, the knowledge of the thermal conductivity of polymer materials is needed. In this work, we propose the measurement of polymer material thermal conductivity using the three omega method. This method requires heating a metallic line conductor placed on the surface of the material under test by an alternating current source. The first measurements were done on polydimethyl siloxane (PDMS) polymer material for which a special procedure that consists in embedding the metallic line conductors near the surface has been applied.In addition to the well-known limitations of photolithography process which are the cost and the process duration, a particular concern lies in the fabrication of the metallic conductors by such process which might be destructive in case of polymer materials. Consequently, we propose an alternative method for this kind of materials based on inkjet printing technology. The thermal conductivities of polyimide and polyetherether ketone have been successfully measured using the three omega method combined with inkjet printing technology for sample preparation. Numerical simulations using finite element method (FEM) are also performed. Finally, experimental measurements are compared to Cahill’s analytical solution and FEM modelling. The overall results demonstrate that the inkjet printing technology is a good candidate for the characterization of flexible materials in terms of thermal conductivity
11
NOVOA, DANNY MESIAS CHAVEZ. "PHYSICAL -CHEMICAL EVALUATION OF HIGH DENSITY POLYETHYLENE PROCESSED BY THE 3D PRINTING METHOD OF FUSED DEPOSITION MODELING FDM." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2014. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24466@1.
Анотація:
PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
O objetivo deste trabalho foi estudar a influencia das condições da impressão 3D nas propriedades finais do polietileno de alta densidade usando a modelagem por fusão e deposição, FDM. Foram impressos protótipos com formato de corpos de prova para teste de tração tipo V segundo norma ASTM D638, a três temperaturas de processamento: 220, 240 e 260 Graus Celsius. Para a impressão das amostras foram mantidos constantes os parâmetros de controle, entre eles a espessura da camada de impressão. As amostras impressas foram caracterizadas por difração de raios X, espectroscopia infravermelha, calorimetria diferencial de varredura, análise termogravimétrica, ensaio de tração, índice de fluidez e teste de contração. Os resultados das caracterizações das amostras impressas foram comparados com os resultados do material sem processar, cujas propriedades foram obtidas usando os mesmo métodos de caracterização. Estes resultados demostraram que as condições de impressão por FDM empregadas neste trabalho causaram apenas uma leve mudança nas características estruturais das amostras processadas do PEAD em relação ao material original sem processamento. Houve um leve aumento da cristalinidade no PEAD impresso (em torno de 1,3 a 3 porcento). Além disso, foi comprovado que por causa do resfriamento desigual na superfície e no interior da amostra impressa, o grau de cristalinidade foi levemente maior no interior que na superfície do corpo de prova impresso. A leve mudança no grau de cristalinidade não foi suficiente para causar mudança no módulo de elasticidade e no limite de escoamento em relação ao PEAD original. Outros resultados demostraram que não houve mudança significativa envolvendo formação de ligações duplas, quebra de cadeias e degradação térmica por efeito da condição do processamento utilizada durante a impressão.
The aim of this work was to study the influence of process conditions for 3D printing on the final properties of prototypes of high density polyethylene (HDPE) using the method of the fused deposition modeling. Prototypes for type-V tensile testing according to ASTM D 638 were printed; They were made to three processing temperatures: 220, 240 and 260 Celsius degree. Control parameters for printing were kept constant in all the samples. The printed samples were characterized by X – ray diffraction, infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, tensile test, melt flow index test, and, shrinkage test. The results of the characterization of the printed samples and of the original material were compared. These results demonstrated that the printing conditions employed in this study caused a slight change in the structural characteristics of the printed samples compared to the unprocessed original material, there being a slight increase in crystallinity (about 1,3 to 3 percent) for HDPE which was printed. In addition, it has been proven that the degree of crystallinity was slightly greater on the inside that on the surface of the printed samples, because of uneven cooling on the surface and inside of these samples. The slight change in the degree of crystallinity was not enough to cause change in the elastic modulus and yield strength compared to the original HDPE. Other results showed that there was not significant change involving bond formation, break chains, and, thermal degradation by the effect of the processing conditions used during printing.
12
Scala, Michael Grant. "A study of the accuracy of reproduction of measured photography : a method to equate the tonal range of the color transparency to the tonal range of the photomechanical reproduction /." Online version of thesis, 1990. http://hdl.handle.net/1850/11239.
13
Robl, Jan. "Využití kovové aditivní technologie při výrobě oběžného axiálního kola turbínového motoru pomocné energetické jednotky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417561.
Анотація:
The thesis deals with the possible use of additive technology in the production of strong thermally exposed components of turbine engines. The first part of the thesis is dedicated to the issue of processing heat-resistant materials by SLM method, introduction of conventional production of selected part and outline of currently used progressive methods in precision casting technology. These theoretical findings are further applied in the practical part of the thesis, which deals with the analysis of mechanical properties of cast and printed material IN 939. Experimental part also includes production of the blisk of the first stage turbine of the auxiliary power unit S5L by SLM additive technology. The thesis also includes analysis of fracture surfaces and metallographic analysis of samples using light and scanning electron microscopy. The thesis ends with the evaluation of the achieved results.
14
Buteková, Silvia. "Kinetika degradace inkjetových barviv." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-234570.
Анотація:
The stability of inkjet print is influenced by a lot of factors. Mutual effects of these factors accelerate the print degradation. The surrounding environment in image stability plays an important role, when the prints degrade especially by the light. The degradation of inkjet prints is presented as a decrease of dye or multiple dyes. It is necessary to know the dye concentration for the dye decrease prediction in the time. This dissertation thesis deals with the study of kinetics and changes in electron and molecular structure of digital photography prints after accelerated ageing tests. The study of resistance of inkjet prints was realized on one type of media using three different sets of inks. Changes in printed colours were measured and evaluated in calibration (by PLS calibration and least squares method). On the basis of calibration the dye decrease prediction of real samples in receiving layer was evaluated. Changes in electron and molecular structure were analysed on KBr pellets by FTIR an UV-Vis spectroscopy.
15
Norberg, Henrik. "Innovating the Electrial Installation : Adapting to the Modern Method of House Building." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-111.
Анотація:
This thesis was a project that was conducted on behalf of Lindbäcks Bygg AB, Träcentrum Norr and Luleå University of Technology. The goal of the project was to develop a new method of performing the electrical installation in the housing modules being built at Lindbäcks Byggs factory. This solution was to be faster, more cost efficient and improve the indoor climate in the final building. Earlier student projects had been done for solving this where the concept for new products had been produced. With that as a base, studies in the laws and standards that governs the electrical installation, a workplace study and interviews was performed and investigations in how the electrical installation currently is performed was done. From this an iterative development phase started, where the problem was broken down in to sub-problems to better be able to work them trough in depth one by one. The sub-problems that were identified was the ceiling junction box, wall junction box, wall – ceiling connection and the wire. During the development phase the need for a solution for when the wall junction box is to be installed in a double wall. To evaluate the different concepts 3d-printing was used extensively given the unbeatable possibility to find problems with the design that this provides. The results was a set of products and a new way of performing the electrical installation that combined reduced costs, shortened lead times, improved working conditions for the person performing the installation and improved indoor climate. The result of the project is presented in the form of a working prototype that can be installed in a module, used for evaluation at a testing facility and estimating production costs.Detta examensarbete var ett projekt som utfördes på uppdrag av Lindbäcks Bygg AB, Träcentrum Norr samt Luleå Tekniska Universitet. Syftet med projektet var att ta fram en ny lösning för elinstallationen i de husmodulerna som tillverkas i Lindbäcks Byggs fabrik. Denna lösning skulle vara snabbare, mer kostnads effektiv och förbättra klimatet i den slutliga lägenheten. Projektet hade sin grund i tidigare studentprojekt på LTU där lösningskoncept hade tagits fram för detta i form av nya produkter. Med det som utgångspunkt genomfördes studier i de rådande lagar och standarder rörande elinstallation, studiebesök, intervjuer och undersökningar i hur elinstallation i dagsläget går till. Efter det kunde ett iterativt utvecklingsarbete påbörjas där problemet bröts ner i delproblem för att var för sig kunna arbetas igenom på djupet. Delproblemen blev takdosan, väggdosan, vägg-tak övergången och kablarna. Under arbetets gång kom även behovet fram för en lösning för då väggdosan skulle installeras i en dubbelvägg. För utvärdering av de olika koncepten användes 3d-utskrifter flitigt då detta gav en oslagbar möjlighet att finna problem med utformningen. Resultatet blev en uppsättning produkter och ett nytt arbetssätt som tillsammans leder till sänkta produktionskostnader, ledtider, förbättrar arbetsmiljön för arbetaren och ger ett bättre inomhusklimat. Resultatet av projektet presenteras i form av en funktionsprototyp som går att montera i moduler samt användas för utvärdering hos testningsanstalter och beräkna produktionskostnader.
16
Mulaka, Brahmananda Reddy. "DEVELOPMENT OF A METHOD TO EVALUATE WRINKLING TENDENCY OF INK-JET PAPERS." Miami University / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=miami1126193926.
17
Gomero-Campos, A., R. Mejia-Huayhua, C. Leon-Chavarri, C. Raymundo-Ibañez, and F. Dominguez. "Lean Manufacturing Production Management Model using the Johnson Method Approach to Reduce Delivery Delays for Printing Production Lines in the Digital Graphic Design Industry." Institute of Physics Publishing, 2020. http://hdl.handle.net/10757/656402.
Анотація:
Several factors compel graphic design companies to improve efficiency and competitiveness in their production lines. However, these companies are not prepared to take on this challenge, as they report delays in 20% of their deliveries, caused by high setup times, low machine availability, and poor work scheduling. In this context, this study proposes a new production management model fed by the interaction of lean manufacturing tools and the Johnson scheduling method. This model has been validated by direct application at the SISSA. The results obtained were the reduction of the setup time to 15 minutes, increased machine availability up to 24%, and an efficient scheduling of its tasks. All of these reduced the percentage of delivery delays from 20% to 6%.
18
Maimaiti, Maimaitirebike. "Study of Inkjet Printing as an Ultra-Low-Cost Antenna Prototyping Method and Its Application to Conformal Wraparound Antennas for Sounding Rocket Sub-Payload." DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1715.
Анотація:
Inkjet printing is an attractive patterning technology that has received tremendous interest as a mass fabrication method for a variety of electronic devices due to its manufacturing exibility and low-cost feature. However, the printing facilities that are being used, especially the inkjet printer, are very expensive. This thesis introduces an extremely cost-friendly inkjet printing method using a printer that costs less than $100. In order to verify its reliability, linearly and circularly polarized (CPd) planar and conformal microstrip antennas were fabricated using this printing method, and their measurement results were compared with copper microstrip antennas. The result shows that the printed microstrip antennas have similar performances to those of the copper antennas except for lower efficiency. The effects of the conductivity and thickness of the ink layer on the antenna properties were studied, and it is found that the conductivity is the main factor affecting the radiation efficiency, though thicker ink yields more effective antennas. This thesis also presents the detailed antenna design for a sub-payload. The sub-payload is a cylindrical structure with a diameter of six inches and a height of four inches. It has four booms coming out from the surface, which are used to measure the variations of the energy flow into the upper atmosphere in and around the aurora. The sub-payload has two types of antennas: linearly polarized (LPd) S-band antennas and right-hand circularly polarized (RHCPd) GPS antennas. Each type of antenna has various requirements to be fully functional for specific research tasks. The thesis includes the design methods of each type of antenna, challenges that were confronted, and the possible solutions that were proposed. As a practical application, the inkjet printing method was conveniently applied in validating some of the antenna designs.
19
Fan, Zongyue. "A Lagrangian Meshfree Simulation Framework for Additive Manufacturing of Metals." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1619737226226133.
20
Colja, Monika. "PEELING GARMENTS : Flat garment construction between fabric layers using the printing process as a construction method and the reference of a peeling wallpaper to create expressive dress." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-23822.
Анотація:
This work is a proposal for an alternative approach to working with print, making the printing process a key element within designing. It is an investigation into flat garment construction between fabric layers, as this enables for the printing to be used in place of sewing. Additionally, working with multiple textile layers connects with the reference of the peeling wallpaper, which is used as a base for material and form developments. The aim of the work is to develop a more holistic approach and new expressions in garment-making in relation to the application of printing processes within textile layers. The main objective is to present a new perspective of the relationship between garment pattern and print, bringing the later forward. Not only does the surface print, through the interaction of colour and texture provide an important element in terms of creating expression, but it additionally acts as a construction element. Moreover, by using the process of printing to create form the element of print becomes integrated into the process of garment-making.
21
Stenford, Rebecka, and Rebecca Röing. "Den nya revolutionen? Additiv tillverknings potential för spridning till modeindustrin." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10240.
Анотація:
Teknisk utveckling och innovation är drivande för samhällets ekonomiska tillväxt. Vilja och förmåga att innovera är också avgörande för företags överlevnad då lyckosam innovation skapar konkurrensfördelar. Additiv tillverkning är en ny produktionsmetod som har potential att revolutionera hur produkter tillverkas. Tekniken kastar om förutsättningarna för hur företag konkurrerar genom att möjliggöra kostnadseffektiv tillverkning av små serier, produktion nära kundorderpunkten och kundanpassning. Modeindustrin är en komplex och hårt konkurrensutsatt bransch där företag befinner sig i en konstant strävan efter differentiering. För att nå framgång måste företag skapa fördelar gentemot konkurrenterna. Flera branscher har redan börjat använda additiv tillverkning och företag skapar framgångsrikt konkurrensfördelar genom att implementera tekniken. Inom modebranschen har dock additiv tillverkning använts begränsat och inte för produktion av konsumentprodukter. Vårt intresse väcktes för att vidare utreda huruvida det är lämpligt att implementera additiv tillverkning på bredare front. Studiens syfte är att fördjupa diskussionen kring spridning av ny teknik genom att studera additiv tillverknings potential för spridning till modeindustrin. Studien har genomförts med en deduktiv ansats där teorikärnan utgjorts av Schumpeters teorier kring innovation och Rogers teorier om innovationsdiffusion. Studien har varit av kvalitativ karaktär där empiriinsamlingen skett genom semi-strukturerade intervjuer med representanter från företag som använder additiv tillverkning samt forskare inom det textila området. Studiens slutsats är att additiv tillverkning inte lämpar sig för produktion av kläder så som vi känner dem idag. När empirin analyseras i förhållande till studiens teorier framkommer aspekter som indikerar ett flertal matchningar mellan fördelarna med additiv tillverkning och modeindustrins karaktärsdrag framkommit. Att implementera additiv tillverkning kan, i framtiden, vara en möjlighet för modeföretag att i framtiden skapa konkurrensfördelar.Technological development and innovation are driving forces behind economic growth. Having the will and ability to innovate are also crucial factors for companies as successful innovation creates competitive advantage. Additive manufacturing is a new production process with the potential to revolutionise the way products are being manufactured. The technique disrupts competitive conditions by enabling cost-effective production of small lot sizes, production close to the decoupling point and customisation. The fashion industry is a complex and highly competitive industry, companies are in a constant quest for means of differentiation. In order to be successful, companies must create advantages over the competitors. Several sectors have already started using additive manufacturing and companies create successful competitive advantage by implementing the technology. In the fashion industry however, additive manufacturing has been used sparsely and not for production of consumer products. Our interest was awaked to further investigate whether or not it is appropriate to extend the use of this new technology. The purpose of this study is to immerse the discussion of diffusion of new technology by studying additive manufacturing’s potential of spreading to the fashion industry. The study was conducted with a deductive approach and the central theories have been Schumpeter’s theories of innovation and Rogers’ theories of diffusion of innovations. The study has been of a qualitative nature and semi-structured interviews with representatives from companies using additive manufacturing and researchers in the textile field were conducted to collect the empirical data. The conclusion is that additive manufacturing is not yet suitable for production of clothing. Nonetheless, when the empirical data was analysed in relation to the theories used, multiple matches between the benefits of additive manufacturing and the characteristics of the fashion industry were revealed. Consequently, implementing additive manufacturing can, in the future, pose opportunities for fashion companies to create competitive advantage. The thesis is written in Swedish.
22
Casbarro, Shaun M. "Experimental digital printing methods." Virtual Press, 2003. http://liblink.bsu.edu/uhtbin/catkey/1265100.
Анотація:
Computer prints have long been viewed as final products. All the work was traditionally completed on the computer then printed as final output, without alteration or adaptation. Unlike other forms of fine arts printing (photo or printmaking) there are no chemical alterations or multiple printing procedures. I have used this exploration to experiment with numerous approaches to digital printing. Several artists have inspired my work, both in approach and technique. Those artists include Robert Rauschenberg, David Hockney, and Man Ray. This creative project is both an experiment in creative printing techniques and the aesthetic creation of experimental works of digital art.The purpose of this project is to explore and experiment with techniques and practices that will push my own digital work to new levels, and open areas of further study for myself and other digital artists.Department of Art
23
Початко, Тетяна Володимирівна, Татьяна Владимировна Початко, Tetiana Volodymyrivna Pochatko, and Y. Znamenshchykov. "Methods and applications of 3D printing." Thesis, Видавництво СумДУ, 2011. http://essuir.sumdu.edu.ua/handle/123456789/13441.
24
Dong, Wei S. M. Massachusetts Institute of Technology. "Innovative color management methods for RGB printing." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38292.
Анотація:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.Includes bibliographical references (leaf 50).
Re-calibrating a printer in response to systematic changes is measurement and labor intensive. In this study, a fast correction method with cycle-to-cycle control was proposed. The process includes two steps: the creation of look-up table using a characterization data set, and image color compensation in conjunction with Windows printing architecture. Several types of correction models for determining printer characterization were proposed and evaluated, including polynomial models and neural network models. The most successful of these methods was the quadratic spline interpolation model, which removed most errors introduced by the changes of colorant and printing substrate. A significant reduction in error was realized by incorporating this technique into the color management program.
by Wei Dong.
M.Eng.
25
Vanderpuije, Curtis N. "Innovative color management methods for RGB printing." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38285.
Анотація:
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2006.Includes bibliographical references (leaf 57).
The demand for printing excellent quality images has increased tremendously in parallel to the growth spurts in the digital camera market. Printing good quality images consistently, however, remains a difficult and/or expensive venture despite the numerous advances in color technology and printing. To alleviate these issues, a color compensating software solution was developed to utilize the unique Kikuze calibration chart to improve printer output. The software solution integrates with the windows printing process at the operating system level through a UNIDRV plug-in. The plug-in retrieves the data within the print stream, passes it on to the color compensation engine which corrects the color data by mapping input and output colors obtained via a B-spline interpolation algorithm. The rendered image is re-introduced into the print stream for final printing. The prototype achieved successful results and can be packaged with commercial printers after a few refinements.
by Curtis N. Vanderpuije.
M.Eng.
26
Hsu, Jui-lin. "A study of ink trapping comparing gravimetric and desitometric methods of measurement /." Online version of thesis, 1989. http://hdl.handle.net/1850/11333.
27
Zhernova, P. "Optimization methods for the selection of protective printing complex." Thesis, НТМТ, 2015. http://openarchive.nure.ua/handle/document/8357.
28
Larsson, Jim. "Evaluation of optical methods for 3D-printing of tissue." Thesis, KTH, Tillämpad fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277786.
29
Deshpande, Kiran. "N-colour separation methods for accurate reproduction of spot colours." Thesis, University of the Arts London, 2015. http://ualresearchonline.arts.ac.uk/8732/.
Анотація:
In packaging, spot colours are used to print key information like brand logos and elements for which the colour accuracy is critical. The present study investigates methods to aid the accurate reproduction of these spot colours with the n-colour printing process. Typical n-colour printing systems consist of supplementary inks in addition to the usual CMYK inks. Adding these inks to the traditional CMYK set increases the attainable colour gamut, but the added complexity creates several challenges in generating suitable colour separations for rendering colour images. In this project, the n-colour separation is achieved by the use of additional sectors for intermediate inks. Each sector contains four inks with the achromatic ink (black) common to all sectors. This allows the extension of the principles of the CMYK printing process to these additional sectors. The methods developed in this study can be generalised to any number of inks. The project explores various aspects of the n-colour printing process including the forward characterisation methods, gamut prediction of the n-colour process and the inverse characterisation to calculate the n-colour separation for target spot colours. The scope of the study covers different printing technologies including lithographic offset, flexographic, thermal sublimation and inkjet printing. A new method is proposed to characterise the printing devices. This method, the spot colour overprint (SCOP) model, was evaluated for the n-colour printing process with different printing technologies. In addition, a set of real-world spot colours were converted to n-colour separations and printed with the 7-colour printing process to evaluate against the original spot colours. The results show that the proposed methods can be effectively used to replace the spot coloured inks with the n-colour printing process. This can save significant material, time and costs in the packaging industry.
30
Кононенко, А. А., та A. A. Kononenko. "Обложка журнала «Vogue. Russia» как способ продвижения издания : магистерская диссертация". Master's thesis, б. и, 2020. http://hdl.handle.net/10995/94039.
Анотація:
В диссертации дана краткая историческая справка оригинального издания «Vogue», описаны условия его появления в России, целевая аудитория и основные способы продвижения журнала. Проанализированы концептуальные особенности обложек глянцевого журнала «Vogue. Russia», рассмотрено представление об обложке как о самостоятельном способе продвижения периодического издания, работающем в определенных условиях на издательском рынке современных СМИ.The dissertation provides a brief historical background of the original Vogue publication, describes the conditions for its appearance in Russia, the target audience and the main ways of promoting the magazine. The conceptual features of the covers of the glossy magazine “Vogue. Russia ”, the idea of the cover as an independent way of promoting a periodical publication, working under certain conditions in the publishing market of modern media, is considered.
31
Bartoška, Vojtěch. "Konstrukce rámu jízdního kola z uhlíkových vláken." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-449781.
Анотація:
This work aims to the design of a carbon fiber bicycle frame with production technology suitable for piece production. The work summarizes the methods of production of composite frames and important parameters that must be respected when designing the frame. A Gravel frame was chosen for the design. The frame was designed for production using stainless steel printed lugs with glued composite tubes. The proposed solution was strength tested. The work also contains a design of a production jig for the construction of bicycle frames.
32
Ehlich, Jiří. "Optimalizace tiskových metod přípravy organických polovodivých vrstev." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316199.
Анотація:
Electrophysiological biosensors enables a novel way to measure electrical activity of biological structures both in-vitro and in-vivo and represents valuable alternative to current cellular activity measuring methods. Within this work we will be focusing on development of organic semiconductor (PEDOT:PSS) based Organic Electrochemical Transistors (OECTs) and optimization of material printing methods used in their development. These transistors are meant to be able to transfer electrochemical signals within the cell membrane to electrical signal. Such sensors should be used for cytotoxicity testing of chemicals and potential drugs on cardiomyocytes. Main benefits of OECTs are in their higher sensitivity thanks to their ability to locally amplify electric signals, better noise-signal ratio and outstanding biocompatibility. Their development is undemanding and inexpensive due material printing methods and materials processable at room temperatures.
33
Strnad, Jiří. "Návrh malé multifunkční modelářské CNC frézky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-444277.
Анотація:
This diploma thesis deals with the construction proposal of a small multifunctional modeller CNC milling machine that enables milling of aluminium alloys and 3D printing using the FDM method. Based on the research, analyzes and defined entry requirements the construction proposal is created and verified by calculations. The thesis contains a description of all the construction parts including the printhead, the tool tray and the safety cover. The other part of the thesis describes the machine geometry adjustment and specifies the choice of control system. The thesis includes a 3D model and the drawing documentation of selected structural nodes.
34
Hsiao, Pei-Chi, and 蕭佩琪. "A Novel Method for Security Printing." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/92854114194692835094.
Анотація:
碩士國立臺灣師範大學
圖文傳播學系
93
As the developments of the information technology and duplication devices, it is easy to obtain a high quality duplication of printed document. Recently, it becomes a serious problem that the modern graphics art techniques, such as scanner or color copiers, are used to duplicate counterfeiting documents. Nowadays, security printings require more and more robust and anti-counterfeiting techniques to resist the guilty abuse. Previous works about watermarking/data hiding for printed images still lack of capability in practice. A novel method is proposed to apply on printed images to make its security features be machine-readable automatically. A random dot patterns are considered as a secret key and its geometric transformation are used to generate a halftone image. Since the partial halftone image is conducted by random dot patterns, the partial image is sufficient for authentication. After acquiring the digital image of printed document by scanner or other devices, a partial matching method, geometric hashing, is used for solving the localization problem automatically and secret key authentication. The proposed method is not only a watermarking method, but also a process for halftoning. Due to added random parameters and at least two combined patterns in the encoding process, it is too complex to decipher the encoded code. In addition, decoding the partial image not only increases the efficiency of authentication, but also conquers the previous limitation of cropped and geometric transformations, such as rotation and scaling. The proposed method suits for combining the digital printing devise and generating the background image with various secret keys as fingerprinting. Experimental results reveal that the proposed method can resist the duplicating manner from scanner or color copiers in certain situation and be applied on print-and-scan documents in practice.
35
Ming-HsiuTsai and 蔡銘修. "Study of Micro-droplet Behavior and Printing Quality by Piezoelectric Ink-jet Printing Method." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/58223143021641105557.
Анотація:
博士國立成功大學
材料科學及工程學系碩博士班
98
Piezoelectric ink-jet printing technology was a droplet deposition method used for liquid phase materials. Ejected micro-droplets were deposited only on the demand positions, resulting in the printing patterns and constructing micro-structures on the substrates. The benefit of ink-jet printing in a non-contacted mode exhibited simpler processing procedures without mask preparation or any lithography process. The printing quality was controlled by droplet behaviors due to various rheological phenomenons performed under different printing conditions. The water-base ink materials were employed in this study for observing droplets evolution during ink-jetting and establishing the fundamental principles of the ink-jet printing method. Droplet behavior for ink materials elucidates quantitatively the fluid mechanics of DOD droplet behavior including the time evolution of liquid thread shape, breakup of liquid thread, satellite formation, and combination of satellites and primary droplet. The other objective is to obtain controlled parameters, droplet diameter and velocity for the most stable single droplets formed. In order to fabricate conductive patterns, three kinds of conductive ink materials were conducted into the lower processing temperature for flexible electronics and microelectronics applications. For the higher viscosity and additives of ink materials, the pulse voltages of waveform were increased to eject micro droplets from the nozzle. Three different modes of ejection were observed; single droplet, double droplets with subsequent recombination, and droplet with satellites. The appropriate dimensionless groups were employed in comparing and analyzing droplet formation process. Silver nitrate water-based solution of varied concentrations resulted in the dot diameter of matrix pattern between 60-220 μm and the line width from 100 μm to 600 μm. The XRD diffraction pattern of printed silver film after reduction at 200oC by ethylene glycol vapor for 10 min shows the peak characteristic of metallic silver. The optimum resistivity of the silver film is 1.9 x 10-6 Ω‧cm measured by the four-probe method due to the dense and continuous surface morphology observed by SEM image.
36
Jung, Ying-Rong, and 鍾穎榮. "Temperature Compensated Method of 3D Printing Laminate Layer." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/9utzw5.
Анотація:
碩士正修科技大學
電子工程研究所
105
Temperature Compensated Method of 3D Printng Laminate Layer Student：Ying-Rong Jung Advisor：Jyh-Haw Wang Department of Electronic Engineering Cheng Shiu University Kaohsiung City, Taiwan, Republic of China Abstract Layered manufacturing, also known as 3-dimensional printing (3D printing), is the use of stacking manufacturing methods layer by layer. Recently, the three-dimensional printing technology developed rapidly, together with the three-dimensional printing technology patent unlocked.has caused this technology greatly to simplify the process of producing complex parts and personalized productions people have pursued,especially the simplest, easiest processing technology of melting extrusion molding.However,When we use the melt extrusion molding processing technology for the three-dimensional printing, an adhesive layer often does not completely come into contact with the laminated cooling because of its waiting for the stack. Then, it will be easy to make a layer with the adhesive layer interface, won’t attach completely.So, the three-dimensional printing will be caused by the uncompleted product stacking. Therefore, the formation of print will fail, the success rate of three-dimensional printing will not be high, and those manufactured products will be flawed and damaged easy. This paper presents a new solution which is the stacking area temperature compensation method. Before printing, this method, consisting of the temperature sensor, heating bar, fan, controller, motherboard, will first input materials (PLA) melting point temperature (175℃) and set the detection temperature (upper limit +3℃ lower limit -5℃). Then, during printing, the chang of the temperature will be detected back and forth.When the detection temperature is too low, then it will start heating rods. On the other hand, when the temperature is too high, it will start the cooling fan to cool down to reach the appropriate temperature. By the comparison of thetemperature compensation and no temperature compensation, the stacking area temperature compensation will effectively improve the previous print quality resuling from uncomplete stacking and no temperature compensation. Besides, it also can increase the success rate of finished printing products. Keywords: Laminated manufacturing, three-dimensional printing, stacking area, temperature compensation, constant temperature
37
Ariadi, Bimo. "Deinking of newsprint by flotation method." Thesis, 1995. https://eprints.utas.edu.au/18994/1/whole_AriadiBimo1996_thesis.pdf.
Анотація:
There is much current interest in development of processes which lead to .
greater utilisation of secondary fibres in papermalcing operations, both in Australia and
overseas. The removal of ink from paper (deinking) is a major step in these
processes. After repulping, ink can be removed from aqueous suspension by a
number of techniques, one of which is flotation. Most commercial deinking facilities
use flotation as the principle method of ink removal.
Studies have been made on the effects of flotation conditions, feedstock
composition, and surfactant during flotation deinking of newspaper (ONP) and
magazines (OMG). Type of surfactant and amount of surfactant appear to affect
deinking performance. Temperature, pH, and furnish also appear to affect deinking
efficiency of the various surfactants investigated. There is an optimum pH of 8.5 for
flotation deinking of a 70/30 mixture of ONP/OMG using a fatty acid type deinking
surfactant.
Increasing proportions of magazines (ash content of 26%) in the feedstock
results in a deinked pulp with higher brightness. However, it was found that the
higher brightness attained is largely due to the addition of higher brightness materials
from the magazines, rather than a more efficient mechanism of ink removal from the
ONP. Addition of Ca2+ in the pulping stage at low level of addition seem to
improve the brightness response for deinking of newspaper with fatty acids. High
level of addition of Ca2+ seems to have detrimental effect.
An attempt is made to explain the results in terms of a model describing the
flotation deinking process and the interactions occurring between surfactant molecules,
ink particles, fibres, and air bubbles.
38
Zeng, Kun-FU, and 曾坤富. "Optimization of 3D Printing Parameters by Using Taguchi Method." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/pvzpkb.
Анотація:
碩士中州科技大學
機械與自動化工程系
105
The domestic industry gradually get rid of the traditional OEM role , especially in hardware products, bicycle design, daily necessities and other products with their own R&D capabilities, and is an important domestic industry, so as to compete with other countries. The Rapid Prototyping (RP) technology is booming and can be used in product development and simple functional testing to accelerate product development. This study develops new models and performs functional tests to enhance the molding effect and improve print fineness, providing users with a better choice. This study explores the self-assembly of 3D printers and uses Taguchi's method to explore the effects of Simplify3D's parameter settings(ex. contour direction, Z-axis lift, reclaiming speed, inertia coasting distance, wiping distance, nozzle temperature, retraction Wiping movement). Using Solid Works to draw 3D test pieces (including round, square, thick pieces, thin pieces, etc.), transfer into G-code and then storage to SD memory card, insert the 3D printer SD plug Slot, and read its G-code to perform a print test. In this study, Taguchi method was carried out according to the degree of warping, the amount of pulled silk, appearance. Then the self-designed 3D printer is compared with the commercially available 3D printer about the manufacturing capability, dimensional accuracy and the design difference, so that it can be a reference for printing and assembling of 3D printer in the future.
39
HONG, SHAO-EN, and 洪紹恩. "Development of Mechanical Kinematic System by 3D Printing Method." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/96130325037585081331.
Анотація:
碩士修平科技大學
電機工程碩士班
104
Recently, the rapid growth of the 3D printing technology has led to the paradigm changing of the manufacture strategy. However, at the present moment 3D printing is only suitable for the fabricating of the sample and prototype, compare to the traditional injection/forming machine. In this paper, the Fused Deposition Modeling method adopts to demonstrate the possibilities of the 3D printing method on the robot arm, the Hexapod machine and the gearbox for the solar scanning/tracing system. Here the author reveals the capabilities for the rapid demonstration and evaluations for update design and further investigation. This report consists of four parts: the first part discussed abut the printing platform and the possible scheme to improve the printing qualities, then the designed robot arm is demonstrating to verify the printing qualities on the control and the kinematics configurations. The investigation on the Hexapod and the Solar scanning device is also been proceed and verified. The discussion on the comparison between the Stereolithoraphy (SLA) and the standard FDM type system (Fused Deposition Modeling) is complete and the recommendations between these two techniques are given. In the following section, the author mention about the fabrication of the robot arm, which include the using of the CAD program to complete the design concept, and setup the kinamic mode through the Arduino control board with Bluetooth control through the mobile device. Similar to the robot arm, the design procedure of the Hexpod is quite similar to the kinematic of the arm. The only different is that the numbers of the server motor that required the additional control board (TOROBOT board), and one need to aware the motion frame that keeping the balancing of the Hexapod. Finally, during the designing of the solar scanner gear box, one need to pay attention on the number of the gear-tooth, the size of the gear and the tolerance criterion. This report suggestion that the FDM printing procedures is more suitable than the SLA method.
40
Lu, Kuan-yi, and 呂冠毅. "Improvement of the Inking Method of Micro-Contact Printing." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/62567256621721761311.
Анотація:
碩士國立中正大學
機械工程所
98
Our group have devoted to flexible electronics fabrication for a long time. There are three key issues for flexible electronics fabrication: patterning thin film on substrate without heating, the uniformity and thickness controllability of the thin film, and using Innovative μCP process” (Innovative Micro-Contact Printing process) with transfer inking technique in our laboratory has achieved that the MEH-PPV thin film thickness is lower than 100 nm and the resolution is 10 μm. But applied to other polymer will be problems. In this thesis, the high fidelity patterning of the innovative μCP process is evaluated. About patterning PMMA and P3HT thin film cause some problems, such as low fidelity and edge effect. I did some experiment and used finite element analysis to analyze transfer inking and printing process force application on stamp and inking pad. To invent PDMS sponge for stamp pre-wetting, the force application on stamp and inking pad too much be solved. Achieved that PMMA and P3HT thin film resolution is 10 μm. Using roller and carrier controlled by servo motor to transfer ink and print, and achieved semi-automatic process.
41
TSAI, CHIH WEI, and 蔡志維. "Applications of microwave heating method in ink jet printing technique." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/32380270533532614678.
Анотація:
碩士中國文化大學
材料科學與奈米科技研究所
96
In the era of video digitizer, an aspiring product which is thinner, smaller, cheaper and easy to produce becomes an aim to pursuit by many researchers. Flexible display’s distinguishing feature is thinner, lighter, and easy to carry. It is also lower cost by using ink jet printing (IJP) technique. In IJP technique, coating a layer of conducting polymer solution on a plastic host substrate, drying in oven and evaporating the solvent, a conducting polymer film on the substrate is then achieved. However, this technique is facing another problem. Its thermostability of the plastic substrate during the drying process must to be concerned. According to our investigation, using microwave heating method instead of traditional oven heating method exploited the unique feature of plastic substrate which did not absorbe microwave radiations. In our experiments, we use four point probe to measure resistance, field emission microscope to compare layer thickness, atomic force microscope to investigate the surface roughness and UV-visible to analysis transparency. The results of comparison of oven heating method and microwave heating method display different consequences. The results of the experiments shows that, (1) while drying by microwave heating method, the shape of the host substrate did not change and its size remained constant; (2) the extent of microwave absorption is proportional to the percentage of the conducting polymer in the coating layer; (3) the conducting polymer film showed lower resistance and higher transmittance while drying with higher temperature. The results of comparison of heating parameters in microwave shows that, (1) when setting at higher the watt make the setting up time of temperature shorter;(2) when preparing the ratio of Baytron P and ETOH higher than 0.5,can reach the setting temperature;(3) when the ratio of coating substrate Baytron P/ETOH is 0.5, the entirely drying time is 30 minutes, layer thickness is 89.5μm, the resistance is 2.055Ω‧cm, the roughness is 1.578nm, and the transparency in wavelength 500nm is around 80%;(4) when analysis physical properties VS. temperature the resistance drop with temperature and rise after 125℃; the transparency will rise with the heating temperature. The results of comparing different coating method shows,(1) when coating with pressure of 500psi for 15 minutes, the layer thickness is 84.6μm, the resistance is 2.814Ω‧cm, the roughness is 1.817nm and the transparency in wavelength 500nm is 99.533%;(2) comparison of impregnate coating method with pressure method, the impregnate coating method shows better the resistance and roughness, but the pressure method shows better transparency results.
42
Lee, Wan-tzu, and 李婉慈. "Applying Taguchi’s Method to the Optimum Parameter Design for Printing." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/97423940075920379899.
Анотація:
碩士國立雲林科技大學
工業工程與管理研究所碩士班
101
This research consider the temperature and humidity. The substrate of glass size is 117 x174 x1.1 .The ink types is baking ink. There are eight control factors , Ink mixer speed, Ink mixer time, pressure of the printing blade, the inclination angle of the printing blade, speed of the printing blade, the capacity of the solvents, the capacity of the Ink, and the capacity of the hardener. This study applies Taguchi Method to printing experiment.Jagging and film thickness are the quality characteristic and belonging to Smaller-the-Better characteristic. Using the digital dial gauge and Dino Lite measurement data to calculate the Signal-to-Noise ratio. The combination of Principal Components Analysis and Grey Relational Analysis to design the optimal parameters of printing multiple quality characteristics.
43
洪國倫. "Optimal Parameters for Digital Heat Transfer-printing by Taguchi Method." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/58817316564286770599.
Анотація:
碩士國立臺灣師範大學
圖文傳播學系
99
Since the printing industry is transforming, the urge for color management among various materials is much higher than before. Digital dye-sublimation thermal printing has the advantage of producing good surface printing results even on materials not absorbing inks, but the printing results are dominated by the operating parameters. If performing the process using default ICC profiles, the color mismatching could be pretty serious. However, applying traditional experiment design methods to generate proper color profiles is, generally speaking, not cost and time efficient. Digital dye-sublimation thermal printing equipments can be roughly divided into 3 sub-systems: raster image processor, dye-sublimation ink jet printer, and heat stamping machine. In my research, the Taguchi methods were used to find the optimal operating parameters and then embed them into the ICC profiles, such that the printing quality could be improved with fewer experiments performed as long as lower the cost for making optimal profiles. It was found that, for aluminum plates, the optimal parameters of dye-sublimation thermal printing are 170℃ for temperature, 40 seconds for time, and 5 ㎏/㎠ for pressure. The profiles made with these parameters, comparing to those with manufacturer's recommendations, reduced the ΔE from 10.29 to 7.89, which was an 23.32% improvement. The quality loss due to the imprecise ICC profiles and improper operating parameters was also decreased by 41.32%. In addition, the a*b* values on the color gamut for the 6 prime colors -- cyan, magenta, yellow, red, green, and blue -- printed with optimal parameters were all getting closer to the ideal values. Besides, it was also found that the stamping time, among all operating parameters, affects the ΔE most. The effectiveness factor for stamping time was 1.62 ΔE, which means precise control of time in the process is critical. It was concluded that, by applying the Taguchi methods, it is an effective and efficient approach for finding the optimal parameters that can be used in generating proper ICC profiles to improve the quality and reduce the ΔE.
44
Desai, Dhanashri Tejpal. "3D-Printing of Lunar Soil Simulant by Direct-Extrusion method." Thesis, 2023. https://etd.iisc.ac.in/handle/2005/6172.
Анотація:
The extrusion-based additive manufacturing (EAM) technique is recently being widely employed for the 3D printing of complex-shaped components made of ceramic powder (containing irregular-shaped particles) when it is cast in the form of a slurry/ink. In this work, we utilize a direct extrusion method for printing structures from extra-terrestrial soil simulants using a piston-based extruder. Printing is demonstrated using a slurry composed of lunar soil simulant (LSS) variant ISAC-1 (avg. particle size ~ 90µm) mixed with biopolymer guar gum as a sustainable binding agent and DI water as a solvent. Parts were printed using a 2 mm diameter nozzle by optimizing print speed, nozzle height, inter-layer drying time, and build temperature, to ensure shape retention post-printing. The final green parts were dried in a hot air oven (50°C) for 48hrs, followed by sandpaper polishing. The strengths of the printed specimens were evaluated using compression and flexure tests and were found to be comparable to that of bio-consolidated structures. Unlike solid geometries, the well-known shell-infill type area-filling strategy generated several travels and re-tracings in the toolpath for cellular geometries. Owing to the yield stress of slurry, the travels and re-tracings resulted in discontinuous print and poor dimensional accuracy respectively. This necessitated a toolpath with increased continuity in the extrusion path. The customized toolpath is generated by defining a continuous nodal path over a lattice structure corresponding to the cellular frame. The extrusion flow rate is tuned according to the nodal path and the requirement of material deposition. Qualitatively the increased extrusion continuity in the customized toolpath resulted in continuous print with improved dimensional accuracy, whereas quantitatively a significant (~ 60%) reduction in print time is observed. These results show the potential for using the direct extrusion 3D printing method in remote extra-terrestrial environments to obtain lightweight load-bearing structures like cellular frames.
45
吳鴻興. "Use ink-jet printing method to fabricate organic field-effect transistors." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/34099612039125321926.
46
Wang, Peng-Ruei, and 王鵬瑞. "The Method of Modified Grayscale on Digital Light Processing 3D Printing." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/225mc3.
47
Lin, Hsin-Yi, and 林欣怡. "Fabricating an artificial antibody film for detecting myoglobin — using microcontact printing method." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/14143924245548318689.
Анотація:
碩士國立成功大學
化學工程學系碩博士班
94
Abstract Myoglobin is known to be an important biological index for the diagnosis of various diseases. Myoglobin tests are done to evaluate a person who has symptoms of acute myocardial infarction (AMI). The serum myoglobin concentration measured over a period, allows the prediction of the position and the area of myocardial infarction. In large quantities, myoglobin can damage the kidneys and break down into toxic compounds, causing kidney failure. In general, the tests for detecting myoglobin are either indicative (i.e. rapid tests), or they need to use expensive natural antibodies (i.e. clinical immunoassays). Additionally, processes for detecting myoglobin by immunoassay in the clinical setting are usually complicated, as antibody activity is not easy to maintain. Therefore, if MIPs can serve as artificial antibodies able to replace their natural counterparts, we can look forward their application in immunoassays. The purpose of this research was to optimize the formation of myoglobin-imprinted polymers to be used in micro-contact printing, which has as its ultimate objective the development of a biosensor. Comparing the Isothermal Titration Calorimeter (ITC) results, obtained in a heterogeneous titration system used to prepare the polymer films with various monomers by UV polymerization for 9 hours, TEGDMA (a crosslinking agent) exhibited the lowest and MMA (a functional monomer) exhibited the highest affinity to myoglobin. The adsorpted quantity of myoglobin on the polymer film prepared with TEGDMA was 2.37 ± 0.30×10-11 mole / cm2. With a ratio of MMA and TEGDMA of 1 to 3, the Myo-MIP appeared to have the highest adsorption quantity, 15.03 ± 0.89 × 10-11 mole/cm2 (2645.28 ng/cm2). For evaluating the removal and imprinting factors of the Myo-MIPs various wash conditions: i.e. acidic, basic, and trypsin extraction methods were investigated. Finally, an extraction solvent comprising of 2 wt. % SDS and 0.6 wt. % NaOH used at 80 ℃ for 30 min was shown to give the highest imprinting factor i.e. 5.82 with 72.82 % myoglobin removal. Scatchard binding plots showed the dissociation constant for the specific binding phase to be 3.4×10-7 M and the theoretical recognition binding site capacity to be 7.24×10-11 mole/cm2; for the non-specific binding phase Kd = 1.355×10-5 M and the non-specific recognition binding site capacity was determined as 9.62×10-10 mole/cm2. The selectivity binding experiments were carried out in both single protein and binary protein systems. The molar ratio of adsorbed myoglobin to IgG, HSA and hemoglobin was found to 115.5, 230.9 and 2.5 respectively. In binary competition systems, myoglobin selectivity to IgG, HSA and hemoglobin was respectively 94.18 %, 98.21 % and 61.09 %. Rebinding the template protein in natural biological matrices, i.e. human serum diluted 20 times by phosphate buffer, showed the film to have significant uptake when 50 ng/ml myoglobin was added compared to myoglobin free controls. Furthermore, when re-binding in undiluted urine, the imprinting factor was determined as 37.4 ± 3.21. This research has resulted in the successful imprinting of myoglobin and proved the possibility of sensing real samples. Comparing IgG and HSA uptake under competitive conditions, the selectivity of the Myo-MIP was 90 %. But the limited selectivity with respect to hemoglobin will limit application in the immediate future.
48
SU, Wei-Chih, and 蘇暐智. "Color Difference Assessment and Color Predicting Method for Fluorescent Digital Textile Printing." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/q6h97z.
Анотація:
碩士國立臺灣科技大學
色彩與照明科技研究所
107
The main purpose of this study is to assess color change of fluorescent digital textile printing in different lighting environments, and to propose a color prediction method for fluorescent textile under different illuminations. To achieve this goal, two experiments are designed, namely Experiment 1: “Fluorescence Color Difference Evaluation Experiment” and Experiment 2: “Fluorescence Color Prediction Experiment”. Experiment 1 investigates the color difference induced by adding ultraviolet light (UV) to standard light sources, and further analyze the relationship between the measured color differences and the perceived color differences, and then use the color difference evaluation. Results The results are analyzed by PF/3 values and correlation coefficients. Experiment 2 proposes a method to predict the flurescent effect under different illuminations by separating the visible light reflection component from the ultraviolet excitation component in a reference condition. The results of the Experiment 1 shows that the color of the fluorescent textile is affected by color temperature of the light source, and the results are quite stable. CIE94 color difference formula is better than the other formulae in prediction the differences. The results of the Experiment 2 shows that artificial neural network can significantly improve the accuracy of color prediction of the reflection combonents compared to commonly used CIELAB reference white transform or Bradford color adaptation transform. In terms of ultraviolet excitation components, nonlinear relationship between ultraviolet illuminance and fluorescence response must be considered to achieve high accuracy of color prediction.
49
Cheng, Yuang-Cheng, and 鄭元政. "Development of semiconductor type CO sensor by using thick-film screen printing method." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/10907104725283242409.
Анотація:
碩士中國文化大學
材料科學與製造研究所
88
ABSTRACT The purpose of this research is to develop a semiconductor type CO sensor by using thick-film screen printing method. To manufacture CO sensing layer by the powers of the ZnO and SnO2, then it is screen printing on the Al2O3 substrate of the sensing layer. To manufacture sensor electrode、 heater and sensing layer by using screen print mechanic, The objective is shrinking volume size of the sensor cell, economize the space size reducity the capital and simply the manufacture processes and mass production. By the screen coating method, we use solvent include Au、Pd catalyst coating on the sensing layer surface or use three-roller mechanic doping catalyst in the sensing layer, increase sensitivity and let working temperature down, and reducity response time and recovery time. From the research results we know that ZnO have high sensitivity to CO gas than SnO2, the sensitivity 5 at CO gas concentration 50 ppm. The temperature at 200℃need 0.5 watts can get higher sensitivity .Using the way of the surface coating we can get the best sensitivity when coating 5 layers catalyst, and response time is 8 seconds and recovery time is 66 seconds.
50
Lin, Wei-Chen, and 林威辰. "Study of Introducing G7 Method to Comply ISO 12647-2 Offset Printing Standard." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/49733764374205406812.
Анотація:
碩士世新大學
圖文傳播暨數位出版學研究所(含碩專班)
102
Print buyers prefer printers that are certified by the international color certification organization while placing order in the international market. Therefore, ISO or other certifications are becoming the major goals for Taiwan’s printing company while seeking for the international orders. However, the inks and the paper that regulated in ISO 12647-2 Standard are not the common materials that used in Taiwan. The differences in daily operating environments may also impact the outcomes. G7 is a printing color control method that based on the ISO 12647-2 Standard. This process was original from the North of America’s General Requirements for Applications in Commercial Offset Lithography (GRACol). Instead of traditional densitometry, G7 utilizes colorimetry for the color controls. The Neutral Print Density Curve (NPDC) is used to modify gray balance instead of TVI control. The color reproduction can be achieved more precisely via this process. With the IDEAlliance’s constant promotion efforts, G7 process has been widely adopted by many printing companies all over the world. The purpose of this study is to clarify whether Taiwan printing companies can meet the ISO 12647-2 Standard by adopting G7 methods while using the common materials. The experimental research method used in this study. The printing conditions are: Kodak Magnus 800 Quantum computer-to-plate machine, Komori Lithrone S40 sheet-fed offset press, 150g/m2 gloss art paper manufactured by Yuen Foong Yu, and the ROSATHAL GS-Series process inks from Dah Bang. The printing plates were normally made using the company standard process in the first run. The press was adjusted to meet the ISO 12647-2 specification using the traditional SID control methods. Based on the first press run, the NPDC was used to adjust gray balance. The curves were applied to CTP for the second test run based on G7. The whole process was under a regular operating environment in the printing plant. The printing characteristics of these two processes were compared and analyzed with the ISO 12647-2 Standard. The results showed: Based on the SID process, the solid color tone, overprint color and TVI value were both within the tolerance of the ISO12647-2, but the neutral gray HC, HR and SC all exceeded the limits of the ISO 12647-2. By adopting G7 process, the solid color tone, overprint color, neutral gray HC, HR, and SC met the ISO 12647-2 Standard. However, the TVI values exceeded the limit of the ISO regulation. It was because in G7 process, CMYK color tones were adjusted for the visual matching in neutral gray. Thus, the original neutral gray that beyond the standard in SID process can be modified to meet the tolerance values. The color reproduction would be more accurate using G7. Therefore, this study indicates that the adopting of G7 process can help Taiwan printing companies to be integrated with ISO and other International organizations’ color standard.ompanies to be integrated with ISO and other International organizations’ color standard.