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Yu-Hsiu Juan,Wei-Chou Chang,Chih-Yung Yu,Hsian-He Hsu,Guo-Shu Huang,De-Chuan Chan,Chang-Hsien Liu,Ho-Jui Tung 연세대학교의과대학 2011 Yonsei medical journal Vol.52 No.4
Purpose: To assess the clinical manifestations and multidetector-row computed tomography (MDCT) findings of afferent loop syndrome (ALS) and to determine the role of MDCT on treatment decisions. Materials and Methods: From January 2004 to December 2008, 1,100 patients had undergone gastroenterostomy reconstruction in our institution. Of these, 22 (2%) patients were diagnosed as ALS after surgery that included Roux-en-Y gastroenterotomy (n=9), Billroth-II gastrojejunostomy (n=7), and Whipple’s operation (n=6). Clinical manifestations and MDCT features of these patients were recorded and statistically analyzed. The presumed etiologies of obstruction shown on the MDCT were correlated with clinical information and confirmed by surgery or endoscopic biopsy. Results: The most common clinical symptom was acute abdominal pain, presenting in 18 patients (82%). We found that a fluid-filled C-shaped afferent loop in combination with valvulae conniventes projecting into the lumen was the most common MDCT features of ALS. Malignant causes of ALS, such as local recurrence and carcinomatosis, are the most common etiologies of obstruction. These etiologies and associated complications can be predicted 100% by MDCT. Conclusion: Our results suggest that MDCT is a reliable modality for assessing the etiologies of ALS and guiding treatment decisions.
User Identification Design by Fusion of Face Recognition and Speaker Recognition
Chao-Yu Lin,Kai-Tai Song,Yi-Wen Chen,Shuo-Cheng Chien,Sin-Horng Chen,Chen-Yu Chiang,Jyh-Her Yang,Yi-Chiao Wu,Tzu-Jui Liu 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
Intelligent human-robot interface helps a mobile robot to extract external information and interact with a user. User identification information allows a robot to generate appropriate behaviors and make personalized human-robot interaction (PHRI) more natural and safe. Most of service robots move around in various application settings, and biometric features always change during relative movements. In this work, a fusion recognition system based on face and speaker classifiers is designed to achieve the user recognition in various environments. We propose a method to fuse face and speech recognition results based on the concept of confidence indices. Through the derived confidence indices, the system combines the two classifiers and gives improved recognition results. Experiments on a laboratory home service robot show that person recognition rates in 15 environmental situations all outperform those of using single modality.
Viability and Functions of Alginate-microencapsulated Islets Isolated from Neonatal Pigs
Lin, Yi-Juain,Wang, Jui-Ping,Chung, Yu-Tung,Sun, Yu-Ling,Chou, Yu-Chi Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.5
Patients with Type I diabetes mellitus have been treated with porcine insulin for several decades and pigs have recently been deemed an ideal source of microencapsulated islet cells for clinical xenotransplantation. In this study, neonatal pigs were anesthetized and sacrificed prior to a pancreatectomy. Islet cells were isolated from pancreas via collagenase digestion. Islet cells were separated and collected by hand under microscopic guidance. These cells were suspended in 1.4% sodium alginate solution and encapsulated by dropping them into 1.1% calcium chloride solution and in which the round gel in size was 250-400 ${\mu}m$ in diameter. Viability of the microencapsulated islet cells cultured in medium at $37^{\circ}C$ was assessed by MTT assay. Furthermore, insulin released in response to glucose challenge was investigated using an enzyme-linked immunosorbent assay. Secretion of insulin was low in response to the basal glucose solution (4.4 mM) in medium and was significantly higher in response to the high glucose solution (16.7 mM). The viability of microencapsulated islet cells did not differ significantly over a period of 7 days; that is, the increasing pattern of insulin concentration in the culture medium after glucose stimulation interval day was similar throughout the 7 days cultivation. In summary, experimental evidences indicated that the effects of alginate-microencapsulation prolonged survival of the neonatal porcine islets in vitro cultures and the insulin response to glucose of the islets was maintained.
Yu-Kai Chen,Yi-Chen Lai,Hong-Wen Hsu,Jui-Yang Chiu 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper presents the design and implementation of multi-level LLC DC/DC PV system with MPPT. The multi-level LLC converters include six LLC modules to supply 380V output voltage. LLC converter is adopted to achieve high efficiency because the low switching loss. The perturb in frequency is proposed to implement the global MPPT control algorithm for the PV system under partial shading condition. A 6kW MPPT prototype is implemented and verified the proposed control method for multi-level LLC DC/DC PV system.
Jui-Sheng Chou,김창완,Pei-Yu Tsai,Chun-Pin Yeh,손효주 대한토목학회 2017 KSCE JOURNAL OF CIVIL ENGINEERING Vol.21 No.6
This article compares Taiwan and Korea high speed rail systems to identify service factors that affect their long-term development. Data were collected by questionnaires and interviews administered over several years to study passenger travel behavior and perceptions of service quality. Analysis results indicate that improving operational effectiveness requires enhanced service quality and that Taiwan High Speed Rail (THSR) passengers are very concerned about facility of infrastructure services. In contrast, the main concern of Korea Train eXpress (KTX) passengers is frontline staff interaction. Notably, the data show that THSR passenger satisfaction increased steadily to levels superior to those expressed by KTX passengers. Another finding is that, in terms of resource allocation, both Taiwan and Korea should improve the handling of passenger complaints, provide improved scheduling information, and strive to improve arrival and departure punctuality. The contribution of this study is the development of a systematic method of assessing the long-term performance of high-speed rail transport services, by which management units can adjust operating strategies to continuously improve services. The analysis results can facilitate the THSR and KTX to formulating planning and operational strategies that can achieve the goal of sustainable operations.
Yu, Hui-Chuan,Tan, Fa-Jui Asian Australasian Association of Animal Productio 2017 Animal Bioscience Vol.30 No.11
Objective: The objective of this study was to optimize ultrasonic-assisted enzymatic hydrolysis conditions, including enzyme-to-substrate (E/S) ratio, pH, and temperature, for producing porcine liver hydrolysates (PLHs) with the highest 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity by using response surface methodology (RSM). Methods: The study used RSM to determine the combination of hydrolysis parameters that maximized the antioxidant activity of our PLHs. Temperature ($40^{\circ}C$, $54^{\circ}C$, and $68^{\circ}C$), pH (8.5, 9.5, and 10.5), and E/S ratio (0.1%, 2.1%, and 4.1%) were selected as the independent variables and analyzed according to the preliminary experiment results, whereas DPPH free radical scavenging activity was selected as the dependent variable. Results: Analysis of variance showed that E/S ratio, pH, and temperature significantly affected the hydrolysis process (p<0.01). The optimal conditions for producing PLHs with the highest scavenging activity were as follows: E/S ratio, 1.4% (v/w); temperature, $55.5^{\circ}C$; and initial pH, 10.15. Under these conditions, the degree of hydrolysis, DPPH free radical scavenging activity, ferrous ion chelating ability, and reducing power of PLHs were 24.12%, 79%, 98.18%, and 0.601 absorbance unit, respectively. The molecular weight of most PLHs produced under these optimal conditions was less than 5,400 Da and contained 45.7% hydrophobic amino acids. Conclusion: Ultrasonic-assisted enzymatic hydrolysis can be applied to obtain favorable antioxidant hydrolysates from porcine liver with potential applications in food products for preventing lipid oxidation.
Purification and characterization of a thermophilic chitinase produced by Aeromonas sp. DYU-Too7
Jui-Rze Too,Te Sheng Lien,Shwu-Tzy Wu,Shin-Tsung Yu 한국화학공학회 2007 Korean Journal of Chemical Engineering Vol.24 No.5
extracellular chitinase, produced by Aeromonas sp. DYU-Too7, was purified in the following proce-phacryl S-100HR. The resulting chitinase has a molecular mas of 36 kDa, an optimal reaction pH of 5.0, and an optimalreaction temperature of 70oC. It retains almost 10% activity in the pH range of 5.0-8.0. This chitinase has a high ther-mal tolerance and retained 90% of its activity at 50oC and 75% at 60oC. Enzyme activity was inhibited by Ba2+, Hg2+,Mg2+ and Ag+ cations, but was not substantially inhibited by the K+ cation nor the chelating agent EDTA. The Km andVmax, using colloidal chitin as a substrate, are 6.3 g/L and 18.69mol/min/mg-protein, respectively. The 36 kDa chitinaseof Aeromonas sp. DYU-To7 is an exo-type enzyme, because chitobiose was the main hydrolysate in hydrolysis ofcolloidal chitin.
Determination of the quality of stripe-marked and cracked eggs during storage
Yu Chi Liu,Ter Hsin Chen,Ying Chen Wu,Fa Jui Tan 아세아·태평양축산학회 2017 Animal Bioscience Vol.30 No.7
Objective: Stripe marks, which occasionally occur on the shell, do not cause breakage to the shell and shell membranes of eggs. This study investigated the quality of intact eggs (IEs), minor stripe-marked eggs (MEs), severe stripe-marked eggs (SEs), and cracked eggs (CEs) during 3-week storage at 25°C. Methods: Shell eggs were collected the day after being laid and were washed. Among them, eggs without any visual cracks or stripe marks on the shells were evaluated as IEs by the plant employees using candling in a darkened egg storage room; the remaining eggs exhibited some eggshell defects. At day 3, the eggs were further categorized into IEs, MEs, SEs, CEs, and broken eggs (BEs) on the basis of the description given. Except BEs, which were discarded, the remaining eggs were stored at 25°C (approximate relative humidity 50%) and then analyzed. Results: Stripe marks were observed primarily within the first 3 days after washing. At day 3, CEs had significantly (p<0.05) lower Haugh unit values, but all eggs had grades AA or A, according to the United States Department of Agriculture standard. As storage time increased, differences in egg quality between groups were more obvious. IEs had the highest eggshell breaking strength. During storage, the total plate counts and pathogens, namely Escherichia coli, Campylobacter spp., Staphylococcus aureus, and Salmonella spp., were not detectable in the internal content of IEs and SEs. Conclusion: In conclusion, cracks degraded egg quality severely and minor stripe marks only slightly influenced the egg quality.