Taiwan Association of Engineering and Technology Innovation: E-Journals
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Participatory Communication Referred to Meta-Design Approach through the FleXpeaker™ Application of Innovative Material in Exhibition Design
Get PDFModelling a communication system in material culture today always involves with objects, people, organizations, activities and interrelationships among them. The researcher suggests bringing together stakeholders engaged to exchange ideas, which the interactions relate to multiple professions and disciplines in a participatory scope of communication system. Owing to the invention of digital media, the status quo of images and sounds has revolutionized and caused changes of the mode of art exhibitions that produce activities and aesthetic concepts in terms of numerical representation, modularity, automation, visual variability and transcoding. Underlying a participatory-design approach, the research emphasizes a co-creative meta-interpretation of museum‟s visitors. In addition, the research delves further into the use of new media-FleXpeaker™ [ITRI], as the carrier. Combining art and design with innovative technology, the research focuses on examining design objects and innovative material which are applied in new media art and exhibition, in the hope to find new angles of participatory interpretation of the “integrated innovation” in curating an exhibition
Effect of Lime and Gypsum on Engineering Properties of Badarpur Fly Ash
Get PDFThe present study was conducted to investigate the performance of Badarpur fly ash stabilized with lime and gypsum. The work investigates the effect of lime (4%, 8%, 12% and 16% by mass of dry fly ash) and gypsum (1%) on compaction (in terms of density/moisture relationship), unconfined compressive strength (UCS), California bearing ratio (CBR), split tensile strength, and resilient modulus of fly ash. Based on strength, fly ash stabilized using 12% lime and 1% gypsum was observed as the highest strength mix. The microstructural development of the stabilized mix was studied through SEM and XRD. The results showed that Badarpur fly ash acquired UCS of 4697 kPa, CBR of 73% after 28 days of curing, split tensile strength of 630 kPa, and resilient modulus of 651 kPa. The strength increases with curing period and the composite achieved strength of 6150 kPa after 90 days of curing. This stabilized Badarpur fly ash can be utilized as road construction material
Study on the Wear Resistance of Sinter Alloying Steel by Deep Cryogenic Treatment
Get PDFSintered alloy steel powder with four different hardenability of FN0200, FN0208, FD0408, and FLNC4808 are applied to form the sintered alloy steel. The sintered alloy steel, being cooled down to room temperature, is further soaked in-196℃liquid nitrogen for 4hrs deep cryogenic treatment.
With deep cryogenic treatment, the retained austenite in the sintered alloy steel would change the phase and become martensite, and the apparent hardness of sintered alloy steel would be enhanced. Further analyzing the effect of deep cryogenic treatment on the wear resistance of sintered alloy steel, the wear resistance would be improved when the apparent hardness of sintered alloy steel is enhanced. However, the deep cryogenic treatment would change the sintered alloy steel microstructures because of distinct hardenability. Such research findings show the significant effect of deep cryogenic treatment on the sintered alloy steel with high hardenability, where the best hardness and wear resistance could be acquired from FLNC4808 sintered alloy steel through the deep cryogenic treatment
Synthesis and Annealing Study of Silicon- and Fluorine-containing Low Bandgap Conjugated Polymers for Solar Cell Applications
Get PDFTwo donor-acceptor alternating conjugated copolymers were synthesized as the donor materials of the active layer in polymer solar cells via Stille coupling reaction. Both copolymers consisted of dithienosilole as the donor unit and nonfluorinated 2,1,3-benzooxadiazole or fluorinated 2,1,3-benzooxadiazole as the acceptor unit. The nonfluorinated polymer and fluorinated polymer were designated as P1 and P2, respectively. The structures of copolymers were confirmed by FT-IR, 1H NMR, and 13C NMR. Optoelectronic properties of the polymer were investigated and observed by UV-vis spectrum, photoluminescence spectrum, and cyclic voltammetry. Both polymers exhibited a panchromatic absorption ranging from 300 nm to 1100 nm and displayed low band gaps of 1.46 eV and 1.42 eV, respectively. Both of the synthesized materials were used as the donor material in the bulk heterojunction (BHJ) solar cells and then power conversion efficiency (PCE) measurements were conducted in different weight ratios of the polymer:PC61BM blends.
Compared to the nonfluorinated one, the fluorinated polymer exhibited a higher PCE of 2.67% at room temperature under the illumination of AM 1.5 (100 mW/cm2). Study of the effect of annealing on the performance of the P1/PC61BM devices using a 1:2 blend ratio of P1:PC61BM exhibited the highest short-circuit current density of 5.88 mA/cm2 and a power conversion efficiency of 2.76% at annealing temperature of 125℃. The bulk heterojunction polymer solar cell employing P2 and PC61BM at a blend ratio of 1:2 exhibited the highest short-circuit current density of 6.44 mA/cm2 and a power conversion efficiency of 3.54% at annealing temperature of 150℃
Color Stability Enhancement of White Organic Light-Emitting Diodes Using a Charge Control Layer
Get PDFBlue phosphorescent iridium complexes iridium(III)bis[(4,6-di-fluorophenyl)-pyridinato-N,C2'] (FIrpic) and yellow phosphorescent iridium complexes Iridium(III) bis (4-phenylthieno [3,2-c]pyridinato-N,C2′)acetylacetonate (PO-01) was doped into the small molecular phosphorescent host N, N_-dicarbazolyl-3, 5-benzene (mCP) to fabricate white phosphorescent organic light-emitting diodes (white PHOLEDs). Device current efficiency is enhanced by inserting a charge control layer (CCL) into the emitting layer.
The peaks of PHOLED electroluminescent (EL) spectrum locate at 472 nm (FIrpic) and 560 nm (PO-01). A high current efficiency white PHOLED has been fabricated by the use of FIrpic and Po-01 as the double emitting layer (EML), in which the mCP is used as the CCL inserted. The doping concentration of PO-01 is optimized and the carrier transport mechanism of CCL is discussed. The optimized current efficiency is 30.06 cd/A. The CIE coordinates locate at (0.33, 0.41) and vary within (±0.01, ±0.01) under driving voltage of 5-15V
Recognition of Concurrent Control Chart Patterns in Autocorrelated Processes Using Support Vector Machine
Get PDFControl chart pattern recognition (CCPR) is an important issue in statistical process control because unnatural control chart patterns (CCPs) exhibited on control charts can be associated with specific causes that adversely affect the manufacturing processes. In recent years, many machine learning techniques have been successfully applied to CCPR. However, such existing research for CCPR has mostly been developed for identification of basic CCPs (Shift Patterns, Trend Patterns, Cyclic Pattern and Systematic Pattern). Little attention has been given to the identification of concurrent CCPs (two or more basic CCPs occurring simultaneously) which are commonly encountered in practical manufacturing processes. In addition, these existing researches also assume the process data are independently and identically distributed which may not be appropriate for certain manufacturing processes. This study proposes a support vector machine (SVM) approach to identify concurrent CCPsfor a multivariate process with autocorrelated observations which can be characterized by afirst order autoregressive (AR(1)) model. The numerical results indicate that the proposed model can effectively identify two concurrent identical CCPs but for those cases involving one trend pattern and one shift pattern, their recognition accuracy deteriorates to around 20% to 50% depending on the autocorrelation coefficients used in the data model
A Way to Introduce Innovative Approach in the Field of Microelectronics and Nanotechnologies in the Chinese Education System
Get PDFThe innovation is more and more useful in order to develop new products such as the connecting objects. The field of microelectronics is particularly concerned by them since it combines the fast evolution of the technology, and their application to many domains. The educative system in China is mainly based on memorization of knowledge: the students are lacking of methodology, understanding and practice. In the same time, the pedagogy in higher education moves progressively towards a numerical approach. In this context, the main challenge is to give to the students, the methodology, the know-how, and thus an innovative behaviour. In this way, several suggestions are given: introduction of much more works on applications of the theoretical knowledge, training on the linking of knowledge, and improvement of the practice by laboratory works on dedicated platforms
Study of Injection Molding Warpage Using Analytic Hierarchy Process and Taguchi Method
Get PDFThis study integrated Analytic Hierarchy Process and Taguchi method to investigate into injection molding warpage. The warpage important factor will be elected by Analytic Hierarchy Process (AHP), the AHP hierarchy analysis factor from documents collected and aggregate out data, then through the expert questionnaire delete low weight factor. Finally, we used Taguchi quality engineering method to decide injection molding optimized combination factors. Furthermore, the paper used injection pressure, holding pressure, holding time, mold temperature to analyze four factors, three levels Taguchi design data. Moreover, the paper discussed the reaction of each factor on the S / N ratio and analysis of variance to obtain the best combination of minimal warpage
The Innovative Bike Conceptual Design by Using Modified Functional Element Design Method
Get PDFThe purpose of the study is to propose a new design process by modifying functional element design approach which can commence a large amount of innovative concepts within a short period of time. Firstly, the original creative functional elements design method is analyzed and the drawbacks are discussed. Then, the modified is proposed and is divided into 6 steps. The creative functional element representations, generalization, specialization, and particularization are used in this method. Every step is described clearly, and users could design by following the process easily. In this paper, a clear and accurate design process is proposed based on the creative functional element design method. By following this method, a lot of innovative bicycles will be created quickly
Power Consumption Reduction for Wireless Sensor Networks Using A Fuzzy Approach
Get PDFThe increasing complexity of Wireless Sensor Networks (WSNs) is leading towards the deployment of complex networked systems and the optimal design of WSNs can be a very difficult task because several constraints and requirements must be considered, among all the power consumption. This paper proposes a novel fuzzy logic based mechanism that according to the battery level and to the ratio of Throughput to Workload determines the sleeping time of sensor devices in a Wireless Sensor Network for environmental monitoring based on the IEEE 802.15.4 protocol. The main aim here is to find an effective solution that achieves the target while avoiding complex and computationally expensive solutions, which would not be appropriate for the problem at hand and would impair the practical applicability of the approach in real scenarios. The results of several real test-bed scenarios show that the proposed system outperforms other solutions, significantly reducing the whole power consumption while maintaining good performance in terms of the ratio of throughput to workload. An implementation on off-the-shelf devices proves that the proposed controller does not require powerful hardware and can be easily implemented on a low-cost device, thus paving the way for extensive usage in practice