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Chen T.,Feng Chia University | Wang Y.-C.,Feng Chia University | Lin Y.-C.,Overseas Chinese Institute of Technology
International Journal of Innovative Computing, Information and Control | Year: 2010

This paper presents a fuzzy-neural system to further improve the performance of scheduling jobs in a wafer fabrication factory. The fuzzy-neural system is modified from the well-known FSVCT rule with three innovative treatments. First, the remaining cycle time of a job is estimated by applying Chen et al's fuzzy-neural approach to improve the estimation accuracy. Second, the components of the FSVCT rule are normalized, and then the division operator is applied instead of the traditional subtraction operator to enhance the responsiveness of the rule. Third, the content of the fuzzy-neural system can be tailored for the wafer fabrication factory and be scheduled with two adjustment factors. To evaluate the effectiveness of the proposed methodology, production simulation was applied to generate some test data. According to the experimental results, the proposed methodology outperformed nine existing approaches in reducing the cycle time average and standard deviation. In addition, the fuzzy-neural system is shown to be a Pareto optimal solution for scheduling jobs in a semiconductor manufacturing factory. © 2010 ICIC International. Source

Chen T.,Feng Chia University | Wang Y.-C.,Feng Chia University | Lin Y.-C.,Overseas Chinese Institute of Technology
International Journal of Innovative Computing, Information and Control | Year: 2010

A bi-criteria four-factor fluctuation smoothing rule is proposed to improve the performance of scheduling jobs in a wafer fabrication factory. The proposed bi-criteria four-factor fluctuation smoothing rule has some innovative characteristics. First, the re-maining cycle time of a job is accurately estimated by applying the fuzzy c-means and fuzzy back propagation network (FCM-FBPN) approach. Second, two tailored nonlinear forms of the fluctuation smoothing rules are obtained to enhance the balancing and re-sponsiveness. Third, the two tailored nonlinear fluctuation smoothing rules are merged into a bi-criteria rule to consider two performance measures (average cycle time and cycle time variation) at the same time. Finally, the content of the bi-criteria rule can be tailored for a wafer fabrication factory with four adjustable factors. To evaluate the effectiveness of the proposed methodology, production simulation was applied. According to the experimental results, the proposed methodology is a Pareto optimal solution by reducing the average cycle time and cycle time standard deviation at the same time. © 2010 ICIC International. Source

Cheng S.-M.,Asia University, Taiwan | Yang L.-L.,Stem Cell Center | Chen S.-H.,Stem Cell Center | Hsu M.-H.,Overseas Chinese Institute of Technology | And 2 more authors.
European Journal of Applied Physiology | Year: 2010

The effect of magnesium supplementation on exercise performance remains controversial. In the present study, the effects of magnesium sulfate on exercise performance and blood glucose metabolism were examined. In order to provide a non-invasive measure of continuous exercise, we developed an auto-blood sampling system was coupled to a microdialysis analyzer to detect the dynamic changes in glucose metabolism in conscious and freely moving gerbils subjected to forced swimming. Gerbils were pretreated with saline or magnesium sulfate (90 mg kg-1, ip) 30 min before exercise. The duration times were significantly increased by 71% in the magnesium sulfate-treated groups (p < 0.01) when compared with those in the control. Another group of gerbils were subjected to blood sampling assay. A catheter was implanted in the jugular vein of each gerbil for collecting blood samples by the computer-aided blood sampler. The basal levels of plasma glucose, lactate, and magnesium were 6,245 ± 662, 1,067 ± 309, and 590 ± 50 μM, respectively, with no significant difference between groups. Plasma glucose, lactate, and magnesium levels increased to 134 and 204%, 369 and 220%, and 155 and 422% of basal levels during swimming in both the control and magnesium sulfate-treated groups, respectively (p < 0.05). Pretreatment with magnesium sulfate elevated glucose and magnesium levels to 175 and 302% of the basal levels (p < 0.05), respectively, whereas pretreatment with magnesium sulfate reduced the lactate levels 150% of the basal level (p < 0.05) during swimming. Furthermore, the magnesium levels increased to about 152-422% of basal levels during forced swimming and the recovery period (p < 0.05). The present study demonstrates that magnesium sulfate improved the duration time of forced swimming exercise. In addition, magnesium raised glucose levels and attenuated lactate levels during forced swimming. These results indicate that positive effects of magnesium supplementation may contribute to the enhancement of exercise performance in athletes. © 2009 Springer-Verlag. Source

Rau J.-Y.,National Chung Hsing University | Tseng H.-H.,Chung Shan Medical University | Chiang B.-C.,Overseas Chinese Institute of Technology | Wey M.-Y.,National Chung Hsing University | Lin M.-D.,National Chung Hsing University
Fuel | Year: 2010

It is expected that the simultaneous removal of acid gases and particles from flue gas, using a single process and at the same temperature, will become an economical, and thus, desirable option. Accordingly, this study investigates the potential for the utilization of a fluidized-bed adsorbent/catalyst reactor for the simultaneous removal of SO2 and fly ash from simulated flue gas. The operating conditions for the evaluation include: (1) different pre-treatments of the adsorbent/catalyst, (2) the operating parameters of adsorption/filtration and (3) the effects of simultaneous adsorption/filtration through the fluidized-bed reactor. Based on the experimental data gathered, the Brönsted acid sites were formed on the surface of activated carbon (AC) support materials after modification with nitric or sulfuric acid and it acted as anchor. This characteristic accounts for the promotion of the effects of dispersion and adsorption of the adsorbent/catalyst. Moreover, the addition of copper facilitated the oxygen transfer of SO2 to the carbon matrix. The concentration of SO2 removed by the fluidized-bed adsorbent/catalyst reactor decreased from 17.9 to 14.2 mg SO2/g of adsorbent after exposure to a high concentration of fly ash. Therefore, an acid-pre-treatment of the adsorbent/catalyst is required to hasten the removal of SO2 in the simulated flue gas. Our result shows that the acidic groups may facilitate the adsorbent/catalyst removal of SO2 when there exist high concentrations of fly ash in the flue gas. © 2009 Elsevier Ltd. All rights reserved. Source

Chu H.-C.,Tunghai University | Lin W.D.,Overseas Chinese Institute of Technology | Chang K.-H.,Tunghai University
Tamkang Journal of Science and Engineering | Year: 2010

Due to the unprecedentedly ubiquitous wireless computer networks and mobile devices become prevalent, more unscrupulous technology hacktivists commit illegal conspiracies towards innocent victims via the ever growing Internet technology. Indeed, cybercrimes are relentlessly reported worldwide. The law enforcement agencies have the indispensable responsibility to crack the well-funded crime syndicate in our computer society. Consequently, Digital Forensics (DF) emerges and becomes the critical success factor to prosecute the culprit and prevent the associate cybercrime incidents from occurring. In the meanwhile, the computer society has an urgent demand for competent DF professionals to gather convincing digital evidences to assist indicting heinous perpetrators in order to allay the fears of everlasting computer crimes events in both private and public sectors. The research provides a vivid roadmap and suggested core curriculum design guidelines for higher education institutions to be integrated into their existing similar program or adopting as a groundbreaking reference model. A serial, cross-discipline, and functional approach were combined in order to design the suggested curriculum. Furthermore, the paper is attempting to minimize the theorypractice gap in DF and provide a milestone for higher education institutions to contemplate if necessary. Source

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