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Chi-Hsin Liu,Chin Shueh,Tien-Chi Lan,Ko-Wei Lin,Wen-Chen Chen,Te-Ho Wu,R. D. Desautels,J. van Lierop 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
The interplay between interlayer coupling and exchange bias coupling in [NiFe/Mn] multilayerbasedthin films was investigated by using ion-beam bombardment during deposition to control theconfigurations from superlattice to nanocomposite or hybrid-structured thin films. Results showedthat well-defined interfaces in the superlattice [NiFe/Mn] thin film exhibited an interlayer couplingbehavior. In contrast, an enhanced coercivity was observed in the nanocomposite [NiFe-Mn] thinfilm. However, the hybrid [NiFe-Mn]/[NiFe/Mn] thin film with an intermixed NiFeMn alloyed filmcomponent gave rise to unusual positive exchange bias coupling.
( Chun-chi Lin ),( Shu-chen Wei ),( Been-ren Lin ),( Wen-sy-tsai ),( Jinn-shiun Chen ),( Tzu-chi Hsu ),( Wei-chen Lin ),( Tien-yu Huang ),( Te-hsin Chao ),( Hung-hsin Lin ),( Jau-min Wong ),( Jen-kou 대한장연구학회 2016 Intestinal Research Vol.14 No.3
Background/Aims: With the recent progress in medical treatment, surgery still plays a necessary and important role in treating ulcerative colitis (UC) patients. In this study, we analyzed the surgical results and outcomes of UC in Taiwan in the recent 20 years, via a multi-center study through the collaboration of Taiwan Society of IBD. Methods: A retrospective analysis of surgery data of UC patients from January 1, 1995, through December 31, 2014, in 6 Taiwan major medical centers was conducted. The patients’ demographic data, indications for surgery, and outcome details were recorded and analyzed. Results: The data of 87 UC patients who received surgical treatment were recorded. The median post-operative follow-up duration was 51.1 months and ranged from 0.4 to 300 months. The mean age at UC diagnosis was 45.3±16.0 years and that at operation was 48.5±15.2 years. The 3 leading indications for surgical intervention were uncontrolled bleeding (16.1%), perforation (13.8%), and intractability (12.6%). In total, 27.6% of surgeries were performed in an emergency setting. Total or subtotal colectomy with rectal preservation (41.4%) was the most common operation. There were 6 mortalities, all due to sepsis. Emergency operation and low pre-operative albumin level were significantly associated with poor survival (P =0.013 and 0.034, respectively). Conclusions: In the past 20 years, there was no significant change in the indications for surgery in UC patients. Emergency surgeries and low pre-operative albumin level were associated with poor survival. Therefore, an optimal timing of elective surgery for people with poorly controlled UC is paramount.
Applying a Life-Cycle Assessment to the Ultra Pure Water Process of Semiconductor Manufacturing
Tien, Shiaw-Wen,Chung, Yi-Chan,Tsai, Chih-Hung,Yang, Yung-Kuang,Wu, Min-Chi The Korean Society for Quality Management 2005 The Asian Journal on Quality Vol.6 No.3
A life-cycle assessment (LCA) is based on the attention given to the environmental protection and concerning the possible impact while producing, making, and consuming products. It includes all environmental concerns and the potential impact of a product's life cycle from raw material procurement, manufacturing, usage, and disposal (that is, from cradle to grave). This study assesses the environmental impact of the ultra pure water process of semiconductor manufacturing by a life-cycle assessment in order to point out the heavy environmental impact process for industry when attempting a balanced point between production and environmental protection. The main purpose of this research is studying the development and application of this technology by setting the ultra pure water of semiconductor manufacturing as a target. We evaluate the environmental impact of the Precoat filter process and the Cation/Anion (C/A) filter process of an ultra pure water manufacturing process. The difference is filter material used produces different water quality and waste material, and has a significant, different environmental influence. Finally, we calculate the cost by engineering economics so as to analyze deeply the minimized environmental impact and suitable process that can be accepted by industry. The structure of this study is mainly combined with a life-cycle assessment by implementing analysis software, using SimaPro as a tool. We clearly understand the environmental impact of ultra pure water of semiconductor used and provide a promotion alternative to the heavy environmental impact items by calculating the environmental impact during a life cycle. At the same time, we specify the cost of reducing the environmental impact by a life-cycle cost analysis.
An Energy Harvester Based on a Bistable Origami Mechanism
Tien-Hoang Ngo,I-Ting Chi,Minh-Quang Chau,Dung-An Wang 한국정밀공학회 2022 International Journal of Precision Engineering and Vol.23 No.2
This paper describes a vibration energy harvester based on an origami mechanism through piezoelectric energy conversion. The device is capable of broadband energy harvesting from low frequency ambient vibrations. This design utilizes bistability inherent in the waterbomb base origami structure to increase the bandwidth of its frequency response. The folding along the crease pattern of the origami mechanism can facilitate large bending deformations of piezoelectric films to generate high electric power output. The compact size and light weight of the origami mechanism render it convenient for integration into various hosts subjected to vibrations. Performance of the origami mechanism is investigated under external excitations with various vibration magnitudes and acceleration levels. This work demonstrates a scheme of broadband vibration energy harvesting by integration of an origami structure with piezoelectric materials. A high fractional bandwidth of 40% is attained under a sinusoidal excitation with a peak acceleration of 0.1 g.
Assessing the Blockage Risk of Disaster-Relief Road for a Large-Scale Earthquake
I-Tien Lo,Ching-Yuan Lin,Cheng-Tao Yang,Ying-Ji Chuang,Chi-Hao Lin 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.12
After a large-scale earthquake, the road is susceptible to get blocked by liquefaction or building collapse, and that results in disaster-relief difficulty. This study adopted two earthquake loss estimation systems in Taiwan, and the risk of road blockage caused by liquefaction or building collapse was calculated separately. A new modeling was proposed, and the comparisons of the results of a single factor and that of the joint factors were made. Four scenarios of peak ground acceleration (PGA) = 250, 400, 550, 750 Gal were tested. The result shows that the probability of road blockage due to liquefaction almost reaches the maximum when PGA hits 400 Gal. On the other hand, the probability of road blockage due to building collapse increases if PGA increases. The joint probability of road blockage due to liquefaction and building collapse can improve the underestimation when using either one factor, and it can evaluate the risk more realistically. At present, there is no risk assessment modeling considering two important factors for disaster-relief road planning in Taiwan. This study provides a simple and comprehensive disaster-relief road risk assessment modeling to make better emergency rescue plans. In addition, it can provide the information for conducting seismic strengthening policy for both sides of the disaster-relief road that can reduce the risk of obstacles to disaster-relief roads.
Jeon, Chi-Hoon,Jeong, Yong-Ha,Seo, Jeong-Jin,Tien, Huynh Ngoc,Hong, Sung-Tae,Yum, Young-Jin,Hur, Seung-Hyun,Lee, Kwang-Jin 한국정밀공학회 2014 International Journal of Precision Engineering and Vol.15 No.6
Graphene/aluminum metal matrix composites (MMC) with enhanced thermal conductivity are fabricated by friction stir processing (FSP). In fabrication of the MMC, graphene reinforcement is applied in the form of a graphene oxide (GO)/water colloid for safer and simpler processing. The result of Raman spectroscopy suggests that graphene reinforcements are successfully mixed into the aluminum matrix by FSP. The thermal conductivity of the graphene/ aluminum MMC is measured to increase by more than 15% in comparison with that of the aluminum matrix. FSP and graphene reinforcement both improve the ductility of the fabricated MMC.
Ching-Fu Tu,Chi-Yun Hsu,Meng-Hwan Lee,Bo-Hui Jiang,Shyh-Forng Guo,Chai-Ching Lin,Tien-Shuh Yang 한국실험동물학회 2018 Laboratory Animal Research Vol.34 No.4
The different polymorphisms of the transcription factor 7-like 2 (TCF7L2) gene promote variances in diabetes susceptibility in humans. We investigated whether these genotypes also promote differences in diabetic susceptibility in commercial pigs. Growing pigs (Landrace, both sex, 50-60 kg) with the C/C (n=4) and T/T (n=5) TCF7L2 genotypes were identified and intravenously injected with streptozotocin (STZ, 40 mg/kg) twice in weekly intervals, then a high-energy diet was offered. Oral glucose tolerance tests, blood analyses and the homeostasis model assessment-insulin resistance (HOMA-IR) index calculations were performed. The animals were sacrificed at the end of 12 weeks of treatment to reveal the pancreas histomorphometry. The results showed that all of the treated pigs grew normally despite exhibiting hyperglycemia at two weeks after the induction. The glycemic level of the fasting or postprandial pigs gradually returned to normal. The fasting insulin concentration was significantly decreased for the T/T carriers but not for the C/C carriers, and the resulting HOMA-IR index was significantly increased for the C/C genotype, indicating that the models of insulin dependence and resistance were respectively developed by T/T and C/C carriers. The histopathological results illustrated a significant reduction in the pancreas mass and insulin active sites, which suggested increased damage. The results obtained here could not be compared with previous studies because the TCF7L2 background has not been reported. Growing pigs may be an excellent model for diabetic in children if the animals are genetically pre-selected.