An Optical Zoom System Based on Tunable Lens with Polymer Membrane and Multilayered Structure

Dan Liang,Dong Tai Liang,Xuan Yin Wang 한국고분자학회 2018 폴리머 Vol.42 No.6

We have developed an optical zoom system based on tunable lens with polymer membrane and multilayered structure. The presented system employed two tunable lenses and two doublet lenses as the main refractive units. Each tunable lens had a delicately designed, solid-liquid mixed structure with multiple internal slim holes, which helped to improve the lens optical properties and stability against gravity. The optical structure and regulation principle of the zoom system is presented, as well as the detailed fabrication process of the tunable lens. Under different displacement loads, the lens deformation properties, and the adjustment ability and imaging characteristics of the zoom system were measured and analyzed. Besides, the spot diagram, field curvature and distortion of the system were simulated using the Zemax software. The magnification of the designed system could be regulated from 0.2X to 4.3X flexibly depending on the focal variation of each tunable lens.

Two New Acorane Sesquiterpenes from Illicium henryi

Tai-Fa Song,Wei-Dong Zhang,Xin-Hua Xia,Yun-Heng Shen,Chun-Mei Liu,Sheng Lin,Hui-zi Jin,Hui-Liang Li 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.9

Two new acorane sesquiterpenes, 10-hydroxyacoronene (1) and 1β-isopropyl-4β-methyl-9β-hydroxy spiro[4.5]dec-6-en-8-one (2), one new natural product, 4-hydroxy-4, 6-dimethyl-1-tetralone (3), and one known acorane sesquiterpene, acoradiepoxide (4) were isolated from the twigs and leaves of Illicium henryi. The structures of the new compounds were elucidated primarily on the basis of analysis of spectroscopic data. In addition, the inhibitory effect on NO production of these compounds were tested. Compounds 1 and 4 exhibited slight inhibitory effects on NO production with IC50 values of 82.4 μg/mL and 76.5 μg/mL, respectively.

Association of XRCC3 Thr241Met Polymorphisms and Gliomas Risk: Evidence from a Meta-analysis

Liang, Hong-Jie,Yan, Yu-Lan,Liu, Zhi-Ming,Chen, Xu,Peng, Qi-Liu,Wang, Jian,Mo, Cui-Ju,Sui, Jing-Zhe,Wu, Jun-Rong,Zhai, Li-Min,Yang, Shi,Li, Tai-Jie,Li, Ruo-Lin,Li, Shan,Qin, Xue Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.7

The relationship between the X-ray repair cross-complementing group 3 (XRCC3) Thr241Met polymorphism and gliomas remains inclusive or controversial. For better understanding of the effect of XRCC3 Thr241Met polymorphism on glioma risk, a meta-analysis was performed. All eligible studies were identified through a search of PubMed, Elsevier Science Direct, Excerpta Medica Database (Embase) and Chinese Biomedical Literature Database (CBM) before May 2013. The association between the XRCC3 Thr241Met polymorphism and gliomas risk was conducted by odds ratios (ORs) and 95% confidence intervals (95% CIs). A total of nine case-control studies including 3,533 cases and 4,696 controls were eventually collected. Overall, we found that XRCC3 Thr241Met polymorphism was significantly associated with the risk of gliomas (T vs. C: OR=1.10, 95%CI=1.01-1.20, P=0.034; TT vs. CC: OR=1.30, 95%CI=1.03-1.65, P=0.027; TT vs. TC/CC: OR=1.29, 95%CI=1.01-1.64, P=0.039). In the subgroup analysis based on ethnicity, the significant association was found in Asian under four models (T vs. C: OR=1.17, 95%CI=1.07-1.28, P=0.00; TT vs. CC: OR=1.79, 95%CI=1.36-2.36, P=0.00; TT vs. TC/CC: OR=1.75, 95%CI=1.32-2.32, P=0.00; TT/TC vs. CC: OR=1.11,95% CI=1.02-1.20). This meta-analysis suggested that the XRCC3 Thr241Met polymorphism is a risk factor for gliomas, especially for Asians. Considering the limited sample size and ethnicities included in the meta-analysis, further large scale and well-designed studies are needed to confirm our results.

Computation Controllable Mode Decision and Motion Estimation for Scalable Video Coding

Liang-Wei Zheng,Gwo-Long Li,Mei-Juan Chen,Chia-Hung Yeh,Kuang-Han Tai,Jian-Sheng Wu 한국전자통신연구원 2013 ETRI Journal Vol.35 No.3

This paper proposes an efficient computation-aware mode decision and search point (SP) allocation algorithm for spatial and quality scalabilities in Scalable Video Coding. In our proposal, a linear model is derived to allocate the computation for macroblocks in enhancement layers by using the rate distortion costs of the base layer. In addition, an adaptive SP decision algorithm is proposed to decide the number of SPs for motion estimation under the constraint of the allocated computation. Experiment results demonstrate that the proposed algorithm allocates the computation resource efficiently and outperforms other works in rate distortion performance under the same computational availability constraint.

The Study of Antioxidant Effects in Melanins Extracted from Various Tissues of Animals

Lin, Liang-Chuan,Chen, Wei-Tai Asian Australasian Association of Animal Productio 2005 Animal Bioscience Vol.18 No.2

This study was carried out to investigate the antioxidant effects of melanin extracts, including silkie fowl skin melanin (SS-melanin), silkie fowl comb melanin (SC-melanin), sepia ink sac melanin (SE-melanin), octopus ink sac melanin (OC-melanin) and synthetic melanin (SY-melanin). The results showed that with the addition of melanin extracts, linoleic acid peroxide significantly, decreased (p<0.05) with the increase in the irradiative time of UV and that OC-melanin had the highest efficiency on antioxidant activity (p<0.05). Melanin extract had reducing power and chelating power to $Fe^{2+}$, which increased with the increase in the different melanin concentration. Therefore, it could be concluded that the antioxidant action of melanin extracts did not come from one single function, but is a result of many characteristic functions.

Current Status and Growth of Nuclear Theranostics in Singapore

Hian Liang Huang,Aaron Kian Ti Tong,Sue Ping Thang,Sean Xuexian Yan,Winnie Wing Chuen Lam,Kelvin Siu Hoong Loke,Charlene Yu Lin Tang,Lenith Tai Jit Cheng,Gideon Su Kai Ooi,Han Chung Low,Butch Maulion 대한핵의학회 2019 핵의학 분자영상 Vol.53 No.2

The concept of theranostics, where individual patient-level biological information is used to choose the optimal therapy for that individual, has become more popular in the modern era of ‘personalised’ medicine. With the growth of theranostics, nuclear medicine as a specialty is uniquely poised to grow along with the ever-increasing number of concepts combining imaging and therapy. This special report summarises the status and growth of Theranostic Nuclear Medicine in Singapore.We will cover our experience with the use of radioiodine, radioiodinated metaiodobenzylguanidine, peptide receptor radionuclide therapy, prostate specific membrane antigen radioligand therapy, radium-223 and yttrium-90 selective internal radiation therapy.We also include a section on our radiopharmacy laboratory, crucial to our implementation of theranostic principles. Radionuclide theranostics has seen tremendous growth and we hope to be able to grow alongside to continue to serve the patients in Singapore and in the region.

New aspect of technology adoption: a case study of students’ self-made English-learning video

Yaming Tai,Yu-Liang Ting 서울대학교 교육연구소 2016 Asia Pacific Education Review Vol.17 No.4

Understanding how students perceive and adopt technology in their daily life is particularly relevant to today’s Information and Communication Technology (ICT) environment, in which versatile ICT tools are becoming more and more pervasive, almost ubiquitous in our day-to-day activities. In the context of English as a foreign language, this study investigates how Chinese students produce an English video with over-the-counter technology tools for accomplishing a language-learning task. In particular, this study probes into how youngsters today respond to a given learning task, how and why they adopt technology tools available and of use to them for the task. Data collection is through observation, students’ reports, and interviews. The focus on specific case study settings offers a closer look at how the use of technology tools is socially and technologically shaped in each individual case. Students reported that they welcomed and valued such learning experience and had in general positive attitude toward the tools and their use in learning. The results reveal students’ willingness and capability in adopting technology tools, whether familiar or unfamiliar to them, and appropriating these tools to fulfill their individual leaning needs. Implications have been drawn to provide a new aspect of technology adoption in school learning.

A Convergent and Stereoselective Synthesis of homogenous alternating α(2→8)/α(2→9) Neu5Ac oligosialic acids

Jeng-Liang Han,Bikash Pal,Kuo-Ching Chu,Chien-Tai Ren,Chung-Yi Wu 한국당과학회 2012 한국당과학회 학술대회 Vol.2012 No.1

Polysialic acids, linearly fused N-acetylneuraminic acid (Neu5Ac), play a central role in numerous biological recognition processes such as lymphocyte homing, tumor metathesis, meningitis, urinary tract infections and pathogenic bacteria infections. Three types of polysialic acids, which are different by the internal linkages, have been isolated and identified from the microorganisms. The α (2→8) polysialic acid is a component of neuroinvasive E. coli K1and N. meningitida serogroup B, while the α (2→9) polysialic acid is a component of N. meningitida serogroup C. The alternating α (2→8)/α (2→9) polysialic acid is isolated from E. coli K92 and Bos-12 strains and not found in mammalian systems, making it a potentially carbohydrate vaccine for medicinal treatment. The glycoconjugates of isolated α (2→9) polysialic acid and a carrier protein (ex: diphtheria or tentanus toxoid) are the current vaccines against Meningococcal group C diseases; however, these vaccines are often heterogeneous or contaminated with other antigenic components due to the difficulty in purifying polysialic acids from natural sources. Recently, our lab has successfully and efficiently synthesized α (2→9) polysialic acids up to dodecamers with high yield using 5 -N,4-O-carbonyl protected phosphate-based donors via the convergent block synthesis strategy.

The Influence of Sharing Evaluation Information on Consumer Buying Behavior in Social Commerce

Bo Shen,Liang Tai,Dan Liu 보안공학연구지원센터 2015 International Journal of u- and e- Service, Scienc Vol.8 No.6

Social commerce is a new generation of e-commerce. Compared to traditional commerce, social commerce, treating social media and social network as a carrier, promotes online trading and information exchange related to commercial activities. Information sharing in social commerce affects buying behavior of consumers in all aspects. Therefore, research on information sharing in social commerce has important implications for further investigation in consumer behavior and business marketing strategy. In this paper, the authors propose a method of multi-agent simulation based on FIRE model, to discuss the influence of sharing evaluation information on consumer buying behavior in social commerce. This study established a simulation model of consumer behavior based on the information, took full account of the effect given by situational factors and information sources, set up rules on consumer decision of purchase on the basis of consumer sub-model and merchant sub-model, realized the simulation for two different information sharing situation by using Repast, and drew relevant conclusions according to simulation results about the total number of transactions and trading volatility of each type of merchants.

Numerical Investigation of Air-Conditioned Flow Field in an Automobile Cabin with Parallel Unstructured Navier-Stokes?Solver

Hua Chen,Wen-Tai Chung,Shen-Min Liang 한국전산유체공학회 2006 한국전산유체공학회 학술대회논문집 Vol.2006 No.5