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Study on engineering properties of ready-mixed soil and slag
Tung-Tsan Chen,Chun-Ling Ho,Her-Yung Wang 사단법인 한국계산역학회 2018 Computers and Concrete, An International Journal Vol.21 No.5
The slag through sieve #4 replaced the natural fine aggregate in different proportions (0-50%) to make ready-mixed soil and slag (RMSAS). The fresh properties studied, and the concrete specimens were produced to test the hardened properties at different ages. Results showed that the workability of RMSAS decreases when the replacement increases. The unit weight increases with the replacement. The setting time extends when the replacement decreases and shortens when the replacement increases. The compressive strength, ultrasonic pulse velocity and hammer rebound value increase with the replacement. However, the high-replacement results decrease because of the expansion factor at late age. Resistivity is close and less than 20 kΩ-cm. After the industrial of steelmaking by-products are processed properly, they can be used in civil engineering, not only as a substitute for natural resources and to reduce costs, but also to provide environmental protection.
Nickel-Tin Solid-Liquid Inter-Diffusion Bonding
Chen-Chiang Yu,배성재,Pei-Chen Su,Tung-Han Chuang 한국정밀공학회 2014 International Journal of Precision Engineering and Vol.15 No.1
This paper presents a solid liquid inter-diffusion (SLID) bonding process using nickel-tin. By using two metals with different melting points, Ni3Sn4, an intermetallic compound (IMC) at 523K was formed. Unlike pure metal, the IMC can be used in high temperature applications of up to 800K without failure. The formation energy of Ni3Sn4 IMC was calculated to be 23.15 kJ/mol from the experimental result. Compared to the traditional soldering technique, a higher temperature resistance bonding joint can be achieved using the nickel-tin SLID bonding technique.
Graphite-based selectorless RRAM: improvable intrinsic nonlinearity for array applications
Chen, Ying-Chen,Hu, Szu-Tung,Lin, Chih-Yang,Fowler, Burt,Huang, Hui-Chun,Lin, Chao-Cheng,Kim, Sungjun,Chang, Yao-Feng,Lee, Jack C. The Royal Society of Chemistry 2018 Nanoscale Vol.10 No.33
<P>Selectorless graphite-based resistive random-access memory (RRAM) has been demonstrated by utilizing the intrinsic nonlinear resistive switching (RS) characteristics, without an additional selector or transistor for low-power RRAM array application. The low effective dielectric constant value (<I>k</I>) layer of graphite or graphite oxide is utilized, which is beneficial in suppressing sneak-path currents in the crossbar RRAM array. The tail-bits with low nonlinearity can be manipulated by the positive voltage pulse, which in turn can alleviate variability and reliability issues. Our results provide additional insights for built-in nonlinearity in 1<I>R</I>-only selectorless RRAMs, which are applicable to the low-power memory array, ultrahigh density storage, and in-memory neuromorphic computational configurations.</P>
REVIEW : Intestinal Stricture in Crohn`s Disease
( Chen Wang Chang ),( Jau Min Wong ),( Chien Chih Tung ),( I Lun Shih ),( Horng Yuan Wang ),( Shu Chen Wei ) 대한장연구학회 2015 Intestinal Research Vol.13 No.1
Crohn`s disease (CD) is a disease with chronic inflammation of unknown etiology involving any part of the gastrointestinal tract. The incidence and prevalence of CD are increasing recently in Asia. Half of the CD patients will have intestinal complica-tions, such as strictures or fistulas, within 20 years after diagnosis. Twenty-five percentage of CD patients have had at least one small bowel stricture and 10% have had at least one colonic stricture and lead to significant complications. Most of these pa-tients will require at least one surgery during their lifetime. Early diagnosis and evaluation with adequate managements for the patients can prevent disability and mortality of these patient. Here, we reviewed the current incidence of CD with stricture, the etiology of stricture, and how to diagnose and manage the stricture. (Intest Res 2015;13:19-26)
Development and Validation of an Integrated Healthy Workplace Management Model in Taiwan
Chen Fu-Li,Chen Peter Y.,Chen Chi-Chen,Tung Tao-Hsin 한국산업안전보건공단 산업안전보건연구원 2022 Safety and health at work Vol.13 No.4
Background: Impacts of exposure are generally monitored and recorded after injuries or illness occur. Yet, absence of conventional after-the-effect impacts (i.e., lagging indicators), tend to focus on physical health and injuries, and fail to inform if workers are not exposed to safety and health hazards. In contrast to lagging indicators, leading indicators are proactive, preventive, and predictive indexes that offer insights how effective safety and health. The present study is to validate an extended Voluntary Protection Programs (VPP) that consists of six leading indicators. Methods: Questionnaires were distributed to 13 organizations (response rate ¼ 93.1%, 1,439 responses) in Taiwan. Cronbach a, multiple linear regression and canonical correlation were used to test the reliability of the extended Voluntary Protection Programs (VPP) which consists of six leading indicators (safe climate, transformational leadership, organizational justice, organizational support, hazard prevention and control, and training). Criteria-related validation strategy was applied to examine relationships of six leading indicators with six criteria (perceived health, burnout, depression, job satisfaction, job performance, and life satisfaction). Results: The results showed that the Cronbach’s a of six leading indicators ranged from 0.87 to 0.92. The canonical correlation analysis indicated a positive correlation between the six leading indicators and criteria (1st canonical function: correlation ¼ 0.647, square correlation ¼ 0.419, p < 0.001). Conclusions: The present study validates the extended VPP framework that focuses on promoting safety and physical and mental health. Results further provides applications of the extended VPP framework to promote workers’ safety and health.
Chen, Wen-Kwei,Liu, Ingrid Y,Chang, Ya-Ting,Chen, Yong-Cyuan,Chen, Chih-Cheng,Yen, Chen-Tung,Shin, Hee-Sup,Chen, Chien-Chang The Society 2010 The Journal of neuroscience Vol.30 No.31
<P>Treatments for chronic musculoskeletal pain, such as lower back pain, fibromyalgia, and myofascial pain syndrome, remain inadequate because of our poor understanding of the mechanisms that underlie these conditions. Although T-type Ca(2+) channels (T-channels) have been implicated in peripheral and central pain sensory pathways, their role in chronic musculoskeletal pain is still unclear. Here, we show that acid-induced chronic mechanical hyperalgesia develops in Ca(v)3.1-deficient and wild-type but not in Ca(v)3.2-deficient male and female mice. We also show that T-channels are required for the initiation, but not maintenance, of acid-induced chronic muscle pain. Blocking T-channels using ethosuximide prevented chronic mechanical hyperalgesia in wild-type mice when administered intraperitoneally or intracerebroventricularly, but not intramuscularly or intrathecally. Furthermore, we found an acid-induced, Ca(v)3.2 T-channel-dependent activation of ERK (extracellular signal-regulated kinase) in the anterior nucleus of paraventricular thalamus (PVA), and prevention of the ERK activation abolished the chronic mechanical hyperalgesia. Our findings suggest that Ca(v)3.2 T-channel-dependent activation of ERK in PVA is required for the development of acid-induced chronic mechanical hyperalgesia.</P>
Dark current suppression of amorphous selenium based photosensors by the ZnO hole blocking layer
Tung-Yuan Yu,Fu-Ming Pan,Cheng-Yi Chang,Tien Hu,Jenn-Fang Chen,Jia-Feng Wang,Jia-Feng Wang,Cheng-Lu Lin,Te-Ming Chen 한국물리학회 2014 Current Applied Physics Vol.14 No.5
To study the influence of defects in the hole blocking layer (HBL) on the dark current of amorphous selenium (a-Se) based photosensors, we prepared ZnO thin films by reactive sputter deposition (RSD) for the use as the HBL of the photosensors. The ZnO HBL layers prepared with different oxygen flow rates were characterized by X-ray photoelectron spectroscopy, Raman scattering analysis and photoluminescence, indicating that the density of oxygen vacancies in the ZnO thin films is significantly affected by the oxygen flow rate. The deep level transient spectroscopy measurement reveals two hole trap levels present in the RSD deposited ZnO thin films; one is at 0.94 eV and the other at 0.24 eV above the valence band edge. The electrical performance of the a-Se photosensor is largely influenced by the amount of oxygen vacancies in the ZnO thin film. The a-Se photosensor with the ZnO HBL of the most oxygen vacancies has the lowest dark current and demonstrates the highest breakdown field.
Tung-Sheng Chen,Show-Yih Liou,Hsi-Chin Wu,Fuu-Jen Tsai,Chang-Hai Tsai,Chih-Yang Huang,Yen-Lin Chang 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.7
Uremic patients with diabetes suffer from high levels of oxidative stress due to regular hemodialysis therapy (neutrophil activation induced by hemo-incompatibility between the hemodialyser and blood) and complications associated with diabetes. Several plasma biomarkers were screened in 13 uremic diabetic patients after receiving the mixture of (–)-epigallocatechin gallate (EGCG), a major component of green tea extract, and Amla extract (AE), from Emblica officinalis, the Indian gooseberry, for 3 months. We found that oral administration of a 1:1 mixture of EGCG and AE for 3 months significantly improved antioxidant defense as well as diabetic and atherogenic indices in uremic patients with diabetes. Furthermore, no significant changes in hepatic function, renal function, or inflammatory responses were observed. These results suggest that a 1:1 combination of EGCG and AE is a safe and effective treatment for uremic patients with diabetes.
Application of Multiobjective Genetic Algorithms for Optimizing Aircraft Crew Pairing Problems
Tung-Kuan Liu,Chiu-Hung Chen,Jyh-Horng Chou,Shinn-Horng Chen,Ta-Yuan Chou 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper develops a method of inequalities-based multiobjective genetic algorithm (MMGA) to solve the crew pairing problems which mainly assign the crew members to each flight segment of a given time period, while complying with a variety of work regulations and collective agreements.There are various objectives to be addressed here and formulated into mathematical equations including legal turn-around time, dead-head, layover, flying time and flying duty period. Through the verification of the real-world study case, the proposed method can solve the crew pairing problems, and obtain feasible solutions which are more useful for practical use.