Investigation on bragg reflection of surface water waves induced by a train of fixed floating pontoon breakwaters

Huei-Tau Ouyang,Kue-Hong Chen,Chi-Ming Tsai 대한조선학회 2015 International Journal of Naval Architecture and Oc Vol.7 No.6

The water wave characteristics of Bragg reflections from a train of fixed floating pontoon breakwaters was studied numerically. A numerical model of boundary discretization type was developed to calculate the wave field. The model was verified by comparing to analytical data in literature and good agreements were achieved. Series of parametric studies were conducted systematically to investigate the dependence of the reflected coefficients by the Bragg scattering on the design variables, including the spacing between the breakwaters, the total number of installed breakwaters, the draft and width do the breakwater, and wave length. Certain wave characteristics of the Bragg reflections were observed and discussed in details which might be of help for practical engineering applications in shoreline protection from incident waves.

Investigation on bragg reflection of surface water waves induced by a train of fixed floating pontoon breakwaters

Ouyang, Huei-Tau,Chen, Kue-Hong,Tsai, Chi-Ming The Society of Naval Architects of Korea 2015 International Journal of Naval Architecture and Oc Vol.7 No.6

The water wave characteristics of Bragg reflections from a train of fixed floating pontoon breakwaters was studied numerically. A numerical model of boundary discretization type was developed to calculate the wave field. The model was verified by comparing to analytical data in literature and good agreements were achieved. Series of parametric studies were conducted systematically to investigate the dependence of the reflected coefficients by the Bragg scattering on the design variables, including the spacing between the breakwaters, the total number of installed breakwaters, the draft and width do the breakwater, and wave length. Certain wave characteristics of the Bragg reflections were observed and discussed in details which might be of help for practical engineering applications in shoreline protection from incident waves.

Tax-Induced Excess Trading Behaviors on ADR Ex-Dividend Days

Bi-Huei Tsai,I-Chih Chen KINFORMS 2010 Management Review Vol.5 No.1

Under U.S. regulations, the differential tax obligations for investors with various status and income levels give rise to investor heterogeneity. In contrast to tax dividend income imposed on U.S. stocks, foreign tax liability is the minimums of the taxation imposed on American depositary receipt (ADR) dividend income. Identical foreign tax rates enable ADR investors to be more homogenous in taxation than U.S. stock holders. The characteristics are likely to enable investors to sell ADRs before cash dividend distributions and repurchase ADRs on ex-dividend dates. As expectations, our analysis exhibits prominent excess returns and excess volume on ADR ex-days. This implies that heavy foreign tax liability simultaneously causes excess returns and excess volumes on ADR ex-dividend days (ex-days). The 3SLS estimation further supports the view that ADR ex-day excess returns are causally and positively related to excess volume. In particular, the ex-day excess returns are significantly associated with dividend yields, transaction costs and risk factors. This suggests the tax-induced returns constrained by transaction costs and firm’s risks.

Research on the Throughput Impact of the Strategic Stabilizing Capacity Constraint Resources by Prolonging Planning Period

Horng Huei Wu,Ching Piao Chen,Chih Hung Tsai,Kuo Wei Huang 한국품질경영학회 2009 The Asian Journal on Quality Vol.10 No.2

Application of Convolution Neural Network Analysis on Intra-row Weeding System for Vegetables

( I-chen Liu ),( Suming Chen ),( Chao-yin Tsai ),( Yung-huei Chang ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

Weeds play an important, non-negligible role in crop cultivation because their competition for sunlight, moisture, nutrients, space and other resources directly affects the growth of crops. Application of chemical treatment on weed control will pollute the environment and agricultural products, while physical treatments is time-consuming and laborious, which leads to low efficiency. This research intends to develop an intelligent vegetable intra-row weeding system using image positioning technology to conduct physical weeding. Total of 474 cabbage images with weeds were captured in the field with camera, in which 379 of these images were used as training data, and the other 95 images were used as testing data. Through the image processing method of Convolutional Neural Network (CNN), the features were extracted and classified between identify cabbages and weeds. There were 381 cabbages in the verified images in total, only 3 of which were unidentified, with a success rate of 99.2%. No weed was identified as cabbage, and the positions of cabbages were also obtained. Field tests were conducted using this built model to identify cabbage and had good recognition rates even when weeds were more than training samples.

Secukinumab demonstrates superior efficacy and faster response in clearing skin of Asian patients compared to ustekinumab: a subgroup analysis of the CLEAR study

( Tsen Fang Tsai ),( Yu Huei Huang ),( Joo-heung Lee ),( Seung-chul Lee ),( Tae-gyun Kim ),( Derrick Chen Wee Aw ),( Weibin Bao ),( Michelle Dee ),( Adriana Guana ),( Min-geol Lee ) 대한피부과학회 2018 대한피부과학회 학술발표대회집 Vol.70 No.2

Background: Although secukinumab demonstrated superior efficacy to ustekinumab in patients with moderate-tosevere plaque psoriasis at 16 and 52 weeks in the global CLEAR study, subgroup analysis among Asian population has not been investigated so far. Objectives: We aimed to describe the efficacy and safety of secukinumab versus ustekinumab over 52 weeks in Asian patients with moderate-to-severe plaque psoriasis in the CLEAR study. Methods: Patients with moderate-to-severe psoriasis received either secukinumab 300mg or ustekinumab 45 or 90mg. Logistic regression analysis of PASI 75, PASI 90 and PASI 100 at week 16 and 52 using nonresponder imputation was conducted, P<0.05 was considered significant. Results: Sixty-two Asian patients were included in the subanalysis (23 secukinumab vs 39 ustekinumab). Secukinumab was superior to ustekinumab in achieving PASI 90 response at week 16. Superior efficacy was also observed for secukinumab vs ustekinumab with respect to PASI 75 and PASI 90 at week 52. Secukinumab exhibited a favorable safety profile similar to ustekinumab in an Asian population, and also consistent with the main trial results. Conclusion: Secukinumab provided superior efficacy over ustekinumab in clearing skin of Asian patients with moderate-to-severe plaque psoriasis. These results are consistent with the core study results (NCT02074982).

다수제적 혼합선거제도 하에서의 투표행태에 대한 다차원 분석

( Chia Hung Tsai ),( Lu Huei Chen ),( Chao Chi Lin ),( Su Feng Cheng ) 한국선거학회 2011 선거연구 Vol.1 No.2

혼합선거제도는 영국의 전통적 소선거구제와 비례제 양자 모두의 좋은 점을 제공한다고 언급된다. 학자들은 후보자와 정당들이 이러한 선거 규칙에 어떻게 반응하는지 고찰해 왔으며, 이 제도 하에서는 상이한 유인 요인이 존재한다고 주장해 왔다. 두 개의 서로 다른 층 간의 상호작용 또한 연구의 대상이 되어 왔다. 본 논문은 소선거구제에서의 투표 행태가 정당의 명성에 의해 영향 받는 정도를 평가해 보고자 하는데, 이는 소선거구 선거 결과와 비례대표 선거 결과 간의 차이에 의해서 측정된다. 대부분의 유권자가 비례대표 표를 던질 때 자신들의 선호를 따르며, 소선거구 표를 던질 때는 현직자를 고려할 것이라고 우리는 가정한다. 한국, 대만, 그리고 일본에서의 투표 행태를 비교함으로써, 사회적 배경, 정치적 태도, 쟁점에 대한 의견 등이 투표 행태에 미치는 상대적 영향력을 이들 세 국가에 걸쳐서 평가할 수 있다. 분석에 사용되는 자료는 선거제도 비교연구(CSES) 2차조사 (2001-2006), 21세기 전국적 장기 설문조사 자료 (JES 3차), 대만의 선거 및 민주화 연구 자료 (TEDS 2008L)이며, 이를 통해 각기 한국의 2004년 총선, 대만의 2008년 의회선거, 그리고 일본의 총선을 고찰한다. It is said that mixed-member systems offer the best of both the traditional British single-member district system (SMD) and proportional representation systems (PR). Scholars have examined how candidates and parties respond to the electoral rule, arguing that there are different incentives for them. The interaction between the two tiers is also investigated. This paper attempts to assess the extent to which voting behavior in the SMD districts would be influenced by party reputation measured by the difference between the SMD and PR voting results. We assume that most voters follow their preferences when they cast their PR votes, but that they consider the incumbents when they cast their SMD ballots. Comparing voting behavior in Korea, Taiwan, and Japan, we are able to assess the relative effect of social backgrounds, political predispositions, and issue opinions on voting behavior across three countries. We use CSES Module 2 (2001-2006) data, the Nation-wide Longitudinal Survey Study on Voting Behavior in the 21st Century (JES III) data, and Taiwan`s Election and Democratization Study (TEDS 2008L) data to examine voting behavior in the 2004 National Assembly election of Korea, the 2008 legislative election of Taiwan, and the 2005 general election of Japan respectively.

Preparation of Carotenoids and Chlorophylls from Gynostemma pentaphyllum (Thunb.) Makino and Their Antiproliferation Effect on Hepatoma Cell

Yu-Chian Tsai,Wen-Bin Wu,Bing-Huei Chen 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.6

A preparative column chromatographic method for isolation of carotenoids and chlorophylls from Gynostemma pentaphyllum, a traditional Chinese herb, was developed to evaluate their antiproliferative effects on the hepatoma cell Hep3B. An open column containing 70g of magnesium oxide–diatomaceous earth (1:2.5, wt/wt) was used to elute carotenoid with 2% ethanol in ethyl acetate and chlorophyll with 50% ethanol in acetone. After high-performance liquid chromatography–mass spectrometry analysis, the carotenoid fraction was composed of all-trans- and cis-isomers of lutein, α-carotene, and β-carotene as well as epoxy-containing carotenoids, while the chlorophyll fraction consisted of chlorophylls a and b and their derivatives. Both carotenoid and chlorophyll fractions as well as lutein and chlorophyll a standards at 50–100μg/mL were effective against Hep3B cells with a dose-dependent response with the following order: carotenoid fraction>chlorophyll fraction>lutein>chlorophyll a. For all treatments, the cell cycle was arrested in the G0/G1 phase, with Hep3B cells undergoing necrosis or apoptosis.

Research on the Throughput Impact of the Strategic Stabilizing Capacity Constraint Resources by Prolonging Planning Period

Wu, Horng-Huei,Chen, Ching-Piao,Tsai, Chih-Hung,Huang, Kuo-Wei The Korean Society for Quality Management 2009 The Asian Journal on Quality Vol.10 No.2

The issue of capacity constraint resources (CCR) or bottlenecks wandering in product mix decision by applying Theory of Constraints (TOC) management philosophy has been mentioned and demonstrated in several papers. In this study, the effect for prolonging the planning period (PPP) so as to stabilize the CCR is investigated. The results show that the effect for PPP alternative will be positive or negative which is depending on the environment condition. However, a majority cases which have positive effect for PPP alternative can be recognized prior knowing the marketing demand, which is significant in the real application.

Predicting the Anthocyanin Content of Kyoho Grapes by Nir Spectroscopy

( Si-yun Wang ),( Suming Chen ),( Chao-yin Tsai ),( Han-chun Hsu ),( Yung-huei Chang ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1

Kyoho grapes are in dark purple color. Anthocyanin plays a major role on the colors of berries, and contains antioxidant, anti-inflammatory, anticancer substance. The method of inspecting Anthocyanins so far is by either visual or destructive technique of using chemicals, but these methods could not carry out real-time accurate inspection. The aim of this study was to demonstrate the feasibility of non-destructive inspection in predicting Anthocyanin content by near-infrared spectroscopy. This study used the NIRS 6500 spectrometer ranged from 400 to 2500 nm. The prediction model of Anthocyanin content of Kyoho grapes was established by near-infrared spectroscopy and concentration of Anthocyanin. The results of this study showed the reliability and feasibility of near-infrared spectroscopy on predicting the Anthocyanin content of grapes. In the future, the Anthocyanin content can be quickly predicted by spectroscopic techniques.