Capsule-Like Fe3O4 Nanoparticles and Triangle Fe3O4 Nanoplates: Facile Synthesis, Magnetic Properties and Catalytic Performance

T. Zeng,Y. Bai,H. Li,W. F. Yao 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.5

In this work, Fe3O4 with nanosized triangle plates and capsule-like nanoparticles were prepared by solvothermal approach (Fe3O4-S) and hydrothermal approach (Fe3O4-H), respectively and their catalytic performance as a heterogeneous Fenton-like catalyst are investigated. Excellent ferromagnetic properties are obtained in both Fe3O4-S nanoplates and Fe3O4-H nanoparticles. The Fe3O4-S nanoplates exhibited better catalytic performance than Fe3O4-H nanoparticles in the degradation of Rhodamine B (RhB) with hydrogen peroxide. The relatively high catalytic activity of Fe3O4-S can be ascribed to its high specific surface area and high degree of crystallinity. Fe3O4-S nanoplates also exhibit good catalytic stability and reusability and do not generate significant loss of catalytic activity after four cycles of degradation.

HOW BUILDING THE GLOBAL WIN-WIN SUPPLY-CHAIN SYSTEMS FOR ENRICHING THE BUSINESS COMPETITIVENESS IN E-ERA

Tzeng, Gwo-Hshiung 인하대학교 정석물류통상연구원 2007 인하대학교 정석물류통상연구원 학술대회 Vol.2007 No.3

The Simulation and Forecast Model for Human Resources of Semiconductor Wafer Fab Operation

Tzeng, Gwo-Hshiung,Chang, Chun-Yen,Lo, Mei-Chen Korean Institute of Industrial Engineers 2005 Industrial Engineeering & Management Systems Vol.4 No.1

The efficiency of fabrication (fab) operation is one of the key factors in order for a semiconductor manufacturing company to stay competitive. Optimization of manpower and forecasting manpower needs in a modern fab is an essential part of the future strategic planing and a very important to the operational efficiency. As the semiconductor manufacturing technology has entered the 8-inch wafer era, the complexity of fab operation increases with the increase of wafer size. The wafer handling method has evolved from manual mode in 6-inch wafer fab to semi-automated or fully automated factory in 8-inch and 12-inch wafer fab. The distribution of manpower requirement in each specialty varied as the trend of fab operation goes for downsizing manpower with automation and outsourcing maintenance work. This paper is to study the specialty distribution of manpower from the requirement in a typical 6-inch, 8-inch to 12-inch wafer fab. The human resource planning in today’s fab operation shall consider many factors, which include the stability of technical talents. This empirical study mainly focuses on the human resource planning, the manpower distribution of specialty structure and the forecast model of internal demand/supply in current semiconductor manufacturing company. Considering the market fluctuation with the demand of varied products and the advance in process technology, the study is to design a headcount forecast model based on current manpower planning for direct labour (DL) and indirect labour (IDL) in Taiwan’s fab. The model can be used to forecast the future manpower requirement on each specialty for the strategic planning of human resource to serve the development of the industry.

Beyond palatable: White privilege and Western immigrant restaurateurs in postcolonial Taiwan

Rueyling Tzeng 한국외국어대학교 국제지역연구센터 2019 International Area Studies Review Vol.22 No.2

Unlike immigrants who must struggle with discrimination, some middle-class Westerners who move to Taiwan use their white privilege to open mid- to high-end restaurants, competing with existing Western-style restaurants whose Taiwanese owners generally use chefs trained locally or in Japan. The author reviews this situation based on evidence drawn from the current literature and in-depth interviews. After more than two centuries of Western imperialism in Asia, whites and Western cuisine continue to be perceived by Taiwanese as symbols of modernity that deserve respect. White privilege, a form of racial capital, grants Westerners the freedom to enter Taiwan and quickly achieve a relatively high status. Compared to restaurateurs in their home countries, white Westerners who open restaurants in Taiwan benefit from lower startup and operating costs, fewer regulations, free local media coverage and, in some cases, a more vibrant national economy. However, they encounter limitations to white privilege in terms of entrenched Taiwanese taste preferences and dining practices. For some white Western migrant restaurateurs, catering to those preferences conflicts with their desire to use authenticity as a personal goal and business strategy.

兩岸間の人的交流に関する規制と実態の乘離に対する一考察 -台湾観光産業の視点から-

曽榮欽 ( Tzeng Rong-ching ) 동북아관광학회 2007 동북아관광연구 Vol.3 No.1

Due to political and ideological differences between Taiwan and Mainland China these two countries were under the war situation and their people had almost no connection to each other before 1979. Since 1979 Mainland China has reformed their economic policy. The political leaders realized the necessity to start the social and economic relations with Taiwan. In Taiwan, the KMT government removed the martial law and allowed Taiwanese to visit their relatives living in Mainland China. Gradually, these two governments open their policies to allow their people a chance to travel to each other, and Taiwanese can even make direct investments on Mainland. But all these new economical policies and other phenomenon were not under the official regulations until 1992 when Taiwanese government established formal laws dealing with all kinds of issues. The main purpose of this article is to study the transformation to official policies from unofficial policies and to evaluate the problems which have been caused by these changes in policies.

Prediction of Mortality after Emergent Transjugular Intrahepatic Portosystemic Shunt Placement: Use of APACHE II, Child-Pugh and MELD Scores in Asian Patients with Refractory Variceal Hemorrhage

Wen-Sheng Tzeng,Reng-Hong Wu,Ching-Yih Lin,Jyh-Jou Chen,Ming-Juen Sheu,Lok-Beng Koay,Chuan Lee 대한영상의학회 2009 Korean Journal of Radiology Vol.10 No.5

Objective: This study was designed to determine if existing methods of grading liver function that have been developed in non-Asian patients with cirrhosis can be used to predict mortality in Asian patients treated for refractory variceal hemorrhage by the use of the transjugular intrahepatic portosystemic shunt (TIPS) procedure. Materials and Methods: Data for 107 consecutive patients who underwent an emergency TIPS procedure were retrospectively analyzed. Acute physiology and chronic health evaluation (APACHE II), Child-Pugh and model for end-stage liver disease (MELD) scores were calculated. Survival analyses were performed to evaluate the ability of the various models to predict 30-day, 60-day and 360-day mortality. The ability of stratified APACHE II, Child-Pugh, and MELD scores to predict survival was assessed by the use of Kaplan-Meier analysis with the log-rank test. Results: No patient died during the TIPS procedure, but 82 patients died during the follow-up period. Thirty patients died within 30 days after the TIPS procedure; 37 patients died within 60 days and 53 patients died within 360 days. Univariate analysis indicated that hepatorenal syndrome, use of inotropic agents and mechanical ventilation were associated with elevated 30-day mortality (p < 0.05). Multivariate analysis showed that a Child-Pugh score > 11 or an MELD score > 20 predicted increased risk of death at 30, 60 and 360 days (p < 0.05). APACHE II scores could only predict mortality at 360 days (p < 0.05). Conclusion: A Child-Pugh score > 11 or an MELD score > 20 are predictive of mortality in Asian patients with refractory variceal hemorrhage treated with the TIPS procedure. An APACHE II score is not predictive of early mortality in this patient population. Objective: This study was designed to determine if existing methods of grading liver function that have been developed in non-Asian patients with cirrhosis can be used to predict mortality in Asian patients treated for refractory variceal hemorrhage by the use of the transjugular intrahepatic portosystemic shunt (TIPS) procedure. Materials and Methods: Data for 107 consecutive patients who underwent an emergency TIPS procedure were retrospectively analyzed. Acute physiology and chronic health evaluation (APACHE II), Child-Pugh and model for end-stage liver disease (MELD) scores were calculated. Survival analyses were performed to evaluate the ability of the various models to predict 30-day, 60-day and 360-day mortality. The ability of stratified APACHE II, Child-Pugh, and MELD scores to predict survival was assessed by the use of Kaplan-Meier analysis with the log-rank test. Results: No patient died during the TIPS procedure, but 82 patients died during the follow-up period. Thirty patients died within 30 days after the TIPS procedure; 37 patients died within 60 days and 53 patients died within 360 days. Univariate analysis indicated that hepatorenal syndrome, use of inotropic agents and mechanical ventilation were associated with elevated 30-day mortality (p < 0.05). Multivariate analysis showed that a Child-Pugh score > 11 or an MELD score > 20 predicted increased risk of death at 30, 60 and 360 days (p < 0.05). APACHE II scores could only predict mortality at 360 days (p < 0.05). Conclusion: A Child-Pugh score > 11 or an MELD score > 20 are predictive of mortality in Asian patients with refractory variceal hemorrhage treated with the TIPS procedure. An APACHE II score is not predictive of early mortality in this patient population.

The Simulation and Forecast Model for Human miconductor Wafer Fab Operation Resources of Se

Gwo-Hshiung Tzeng,Chun-Yen Chang,Mei-Chen Lo 대한산업공학회 2005 Industrial Engineeering & Management Systems Vol.4 No.1

The efficiency of fabrication (fab) operation is one of the key factors in order for a semiconductormanufacturing company to stay competitive. Optimization of manpower and forecasting manpower needs in a modern fab is an essential part of the future strategic planing and a very important to the operational efficiency. operation increases with the increase of wafer size. The wafer handling method has evolved from manual mode in 6-inch wafer fab to semi-automated or fully automated factory in 8-inch and 12-inch wafer fab. The dis-tribution of manpower requirement in each specialty varied as the trend of fab operation goes for downsizing manpower with automation and outsourcing maintenance work. This paper is to study the specialty distribution planning in todays fab operation shall consider many factors, which include the stability of technical talents. This empirical study mainly focuses on the human resource planning, the manpower distribution of specialty structure and the forecast model of internal demand/supply in current semiconductor manufacturing company. Considering the market fluctuation with the demand of varied products and the advance in process technology, recast model based on current manpower planning for direct labour (DL) and indirect labour (IDL) in Taiwans fab. The model can be used to forecast the future manpower requirement on each specialty for the strategic planning of human resource to serve the development of the industry.

Synthesis, characterization, and visible light induced photoactivity of tourmaline-N-TiO2 composite for photooxidation of ethylene

Jing-Hua Tzeng,Chih-Huang Weng,Yu-Hao Lin,Shang-Ming Huang,Li-Ting Yen,Jin Anotai,Yao-Tung Lin 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-

A novel visible light driven tourmaline-nitrogen-doped-TiO2 composite (S-N-TiO2) was prepared using afacile impregnation and sol gel method and its photocatalytic reaction scheme with ethylene wasproposed. X-ray diffraction analysis confirmed the presence of TiO2 in the form of anatase phase. Scanning electron microscope and energy dispersive spectrometer mapping showed that the TiO2particles were deposited and dispersed on the surface of tourmaline. Under visible light irradiation, the SN-TiO2 catalyst containing 4 wt.% tourmaline has higher photocatalytic activity for the oxidation ofethylene than pure TiO2 and N-doped-TiO2 (N-TiO2). This enhanced activity could be not only attributedto the narrowed band gap in visible light driven N-TiO2, but also improved by the spontaneous electricfield of tourmaline which was applied to restrain the recombination of the electron–hole pairs. Thephotogenerated electrons from N-TiO2 were induced by electricfield to react with ethylene, and theleaving photogenerated holes also formed the reactive species. The photocatalytic activity of S-N-TiO2 ismuch affected by synthesis conditions. This novel S-N-TiO2 photocatalyst has a promising perspective inthe gas treatment for air pollution control and horticultural product industries.

The Simulation and Forecast Model for Human Resources of Semiconductor Wafer Fab Operation

Gwo-Hshiung Tzeng,Chun-Yen Chang,Mei-Chen Lo 대한산업공학회 2005 Industrial Engineeering & Management Systems Vol.4 No.1

Optimization of Electric Discharge Machining Process Using the Response Surface Methodology and Genetic Algorithm Approach

Chorng-Jyh Tzeng,Rui-Yang Chen 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.

This study is analyzed the material removal rate, electrode wear ratio and workpiece surface finish on process parameters during the manufacture of SKD61 by electrical discharge machining (EDM). A hybrid method including a back-propagation neural network (BPNN), a genetic algorithm (GA), and response surface methodology (RSM) were proposed to determine optimal parameter settings of the EDM process. Specimens were prepared under different EDM processing conditions according to a Taguchi orthogonal array table. The results of 18 experimental runs were utilized to train the BPNN to predict the material removal rate (MRR), relative electrode wear ratio (REWR) and roughness average (Ra) properties. Simultaneously, the RSM and GA approaches were individually applied to search for an optimal setting. In addition, analysis of variance (ANOVA) was implemented to identify significant factors for the EDM process parameters, and results from the BPNN with integrated GA were compared with those from the RSM approach. The results show that the proposed algorithm of GA approach has better prediction and confirmation results than the RSM method.