2-ch x 40-Gb/s OTDM Transmission over 100 km of 1.3 μm Zero-Dispersion Single-Mode Fiber

H. Ooi,G. Ishikawa,Y. Akiyama 한국통신학회 1997 OPTOELECTRONICS & COMMUNICATIONS CONFERENCE Vol.2 No.1

Image-based handwritten signature verification using hybrid methods of discrete Radon transform, principal component analysis and probabilistic neural network

Ooi, S.Y.,Teoh, A.B.J.,Pang, Y.H.,Hiew, B.Y. Elsevier Science, B.V 2016 Applied soft computing Vol.40 No.-

<P>Image-based handwritten signature verification is important in most of the financial transactions when a hard copy of signature is needed. Considering the lack of dynamic information from static signature images, we proposed a working framework through hybrid methods of discrete Radon transform (DRT), principal component analysis (PCA) and probabilistic neural network (PNN). The proposed framework aims to distinguish forgeries from genuine signatures based on the image level. Extensive experiments are conducted on our own independent signature database, and a public signature database- MYCT. Equal error rates (EER) of 1.51%, 3.23% and 13.07% are reported, respectively, for random, casual and skilled forgeries of our own database. When working on the MYCT signature database, our proposed approach manages to achieve an EER of 9.87% with 10 training samples. (C) 2015 Elsevier B.V. All rights reserved.</P>

Treatment-Induced Blood Pressure Reduction and the Risk of Myocardial Infarction

Alderman, Michael H.,Ooi, Wee L.,Madhavan, Shantha,Cohen, Hillel MediMedia Korea 1989 JAMA-Korea Vol.4 No.11

Application of Bacterial Endophytes to Control Bacterial Leaf Blight Disease and Promote Rice Growth

Ying Shing Ooi,Nik M. I. Mohamed Nor,Go Furusawa,Munirah Tharek,Amir H. Ghazali 한국식물병리학회 2022 Plant Pathology Journal Vol.38 No.5

Xanthomonas oryzae pv. oryzae (Xoo) causes bacterial leaf blight (BLB) disease in rice (Oryza sativa L.) and it is among the most destructive pathogen responsible for severe yield losses. Potential bacterial biocontrol agents (BCAs) with plant growth promotion (PGP) abilities can be applied to better manage the BLB disease and increase crop yield, compared to current conventional practices. Thus, this study aimed to isolate, screen, and identify potential BCAs with PGP abilities. Isolation of the BCAs was performed from internal plant tissues and rhizosphere soil of healthy and Xoo-infected rice. A total of 18 bacterial strains were successfully screened for in vitro antagonistic ability against Xoo, siderophore production and PGP potentials. Among the bacterial strains, 3 endophytes, Bacillus sp. strain USML8, Bacillus sp. strain USML9, and Bacillus sp. strain USMR1 which were isolated from diseased plants harbored the BCA traits and significantly reduced leaf blight severity of rice. Simultaneously, the endophytic BCAs also possessed plant growth promoting traits and were able to enhance rice growth. Application of the selected endophytes (BCAs-PGP) at the early growth stage of rice exhibited potential in suppressing BLB disease and promoting rice growth.

Effect of Potato By-products Based Silage on Rumen Fermentation, Methane Production and Nitrogen Utilization in Holstein Steers

Pen, B.,Iwama, T.,Ooi, M.,Saitoh, T.,Kida, K.,Iketaki, T.,Takahashi, J.,Hidari, H. Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.9

The effect of substituting potato by-products based silage (PBS) for concentrates on ruminal fermentation, methane production and nitrogen utilization in Holstein steers was evaluated. Three growing Holstein steers ($490{\pm}19kg$, initial body weight) were used in a $3{\times}3$ Latin square experiment with three experimental diets in which PBS was included at (1) 0, (2) 19 and (3) 27%, on a dry matter basis, replacing concentrates and wheat bran. Increasing replacement levels of PBS slightly increased dry matter (DM), organic matter (OM), NDF and ADF intakes by the steers (p<0.05). Inclusion of PBS at 19% increased crude protein (CP) digestibility of the experimental diets compared with the control (p<0.05). Substitution with PBS increased ADF digestibility and nitrogen retention (p<0.05), but did not affect energy retention. Energy loss as methane ranged between 5.0 and 6.1% of the total gross energy intake. There were no significant differences in carbon dioxide and methane production among all PBS levels, while daily methane production numerically increased with PBS inclusion. Substituting PBS for concentrates did not significantly affect ruminal pH and ammonia N concentration. Total VFA concentration, VFA molar proportions and blood metabolites were also unaffected by PBS replacement. These results suggest that substitution of PBS up to 27% of diet dry matter did not significantly increase methane production and was equal or superior to concentrates in ADF digestibility and nitrogen retention for growing steers.

Synthesis of Needle-Shape ZnO-ZnS Core-Shell Heterostructures and Their Optical and Field Emission Properties

Jalal Rouhi,C. H. Raymond Ooi,Shahrom Mahmud,Mohamad Rusop Mahmood 대한금속·재료학회 2015 ELECTRONIC MATERIALS LETTERS Vol.11 No.6

Well-aligned ZnO-ZnS core-shell nano-needle arrays were synthesized using a simple aqueous solution approach to investigate the optical and field emission properties of heterostructure materials. The photoluminescence of the coreshell nano-needles exhibits a distinct enhancement compared with that of uncoated ZnO nano-needles. The UV-vis spectra show that the ZnS shell layer enhances the optical absorption of ZnO nano-needles by decreasing the interface band gap, which indicates the potential application of heterostructures in photovoltaic and solar cells. The core-shell nano-needles exhibit a remarkably high field enhancement factor of 3.74 × 103, a low turn-on field of 2.31 V/μm, and a high time stability. These findings show that the construction of core-shell heterostructure can efficiently improve the field emission performance of ZnO nano-needles, which is a promising route for the development of novel nanoemitters with controllable morphology and as suitable shell materials for heterostructures.

CELEBRITY BRAND EXTENSIONS ON INSTAGRAM: TESTING A SERIAL MULTIPLE MEDIATION MODEL OF CELEBRITY WORSHIP AND STYLE CONFORMITY

Jasmine A.L. Yeap,Norkhalilah Khalid,Emily H.T. Yapp,Say Keat Ooi 글로벌지식마케팅경영학회 2018 Global Marketing Conference Vol.2018 No.07

Introduction Celebrities are actively capitalizing on their fame and credibility by launching their own brand extensions which are heavily promoted on Instagram. This situation is especially prevalent in Malaysia among many local Malay ‘celepreneurs’. While consumers’ constant involvement with a celebrity on Instagram is believed to result in the purchase of celebrity branded products, the central question of how a causal variable such as Instagram involvement has an effect on the outcome of purchase has been less explored in contemporary studies. The role of celebrity adulation and style conformity in the context of celebrity branding-cum-entrepreneurship deserves much attention given the strong influence celebrities exert on young consumers in this digital era of accessible information. Research framework Given the admiration that young consumers have towards the celebrities they follow on Instagram, celebrity worship, in both pathological and non-pathological form, is believed to be a crucial link between their involvement with the social media and their desire to imitate their favourite celebrity’s style. Eventually this paves the way for the purchase of celebrity brand products given that getting the products is an avenue for the young consumers to attain their celebrities’ style. Therefore in this study, four variables that mediate the relationship between Instagram involvement and purchase of celebrity branded products are examined: celebrity worship as manifested across three varying levels particularly entertainment-social (lowest form of worship); intense-personal (mid-level); borderline pathological (highest level); and style conformity. Method Data was collected from 226 Malaysian women of Malay ethnicity who are active Instagram users and fall under the technology-savvy Millennial segment using a self-administered questionnaire. This segment of consumers is technology savvy and has personalities and lifestyles (Gurau, 2012). They also tend to imitate their favourite celebrity in contrast to their male counterparts (Djafarova & Rushworth, 2017). Measures for the mediating variables were derived from McCutcheon et al.’s (2002) Celebrity Worship Scale and Park and Yang’s (2010) items on celebrity style conformity. A five-point scale (1=strongly disagree to 5=strongly agree) was utilized to capture the responses to the variables measured. Analysis and results Serial multiple mediation testing was applied on the data using variance-based structural equation modelling. The multiple mediation analysis showed that of all the three levels of celebrity worship which mediate the link between Instagram involvement and style conformity, only celebrity worship (entertainment-social) was found to be a significant mediator between Instagram involvement and style conformity (Indirect effect=0.127; t-value= 3.285, 95% Boot CI: LL=0.059, UL=0.216). In addition, the presence of a serial mediation was detected for the link between Instagram involvement-celebrity worship (entertainment-social)-style conformity-purchase of celebrity brand products (Indirect effect=0.04; t-value=2.954, 95% Boot CI: LL=0.02, UL=0.08). Conclusion The serial mediation testing in this study has demonstrated that celebrity worship and style conformity serve as the missing link between the involvement-purchase relationship. Furthermore, the multiple mediation testing has shown that only celebrity worship at the basic level functions as a mediator. The findings of this study imply that the use of Instagram is indeed a compelling marketing communication tool that fosters the purchase of celebrity brand extensions. Constant involvement in Instagram by following the celebrity, liking, reposting, commenting or hashtagging on the celebrity’s account builds a keen sense of devotion for the celebrity whereby the individual will constantly watch, read and learn about the celebrity. This then heightens the user’s desire to emulate the style of the celebrity which may well lead them to purchase the celebrity’s products in an effort to imitate the celebrity’s look and demeanour. strong desire for and high willingness to spend on branded products that match their

An Optimized Iterative Semantic Compression Algorithm And Parallel Processing for Large Scale Data

( Ran Jin ),( Gang Chen ),( Anthony K H Tung ),( Lidan Shou ),( Beng Chin Ooi ) 한국인터넷정보학회 2018 KSII Transactions on Internet and Information Syst Vol.12 No.6

With the continuous growth of data size and the use of compression technology, data reduction has great research value and practical significance. Aiming at the shortcomings of the existing semantic compression algorithm, this paper is based on the analysis of ItCompress algorithm, and designs a method of bidirectional order selection based on interval partitioning, which named An Optimized Iterative Semantic Compression Algorithm (Optimized ItCompress Algorithm). In order to further improve the speed of the algorithm, we propose a parallel optimization iterative semantic compression algorithm using GPU (POICAG) and an optimized iterative semantic compression algorithm using Spark (DOICAS). A lot of valid experiments are carried out on four kinds of datasets, which fully verified the efficiency of the proposed algorithm.

A single institution experience with robotic and laparoscopic distal pancreatectomies

Shi Qing Lee,Tousif Kabir,Ye-Xin Koh,Jin-Yao Teo,Ser-Yee Lee,Juinn-Huar Kam,Peng-Chung Cheow,Prema Raj Jeyaraj,Pierce K. H. Chow,London L. Ooi,Alexander Y. F. Chung,Chung-Yip Chan,Brian K. P. Goh 한국간담췌외과학회 2020 Annals of hepato-biliary-pancreatic surgery Vol.24 No.3

Backgrounds/Aims: This study aims to describe our experience with minimally-invasive distal pancreatectomies, with emphasis on the comparison between robotic distal pancreatectomy (RDP) and laparoscopic distal pancreatectomy (LDP). Methods: Retrospective review of 102 consecutive RDP and LDP from 2006 to 2019 was performed. Results: There were 27 and 75 patients who underwent RDP and LDP, respectively. There were 12 (11.8%) open conversions and 16 (15.7%) patients had major (>grade 2) morbidities. Patients who underwent RDP had significantly higher rates of splenic preservation (44.4% vs. 13.3%, p=0.002), higher rates of splenic-vessel preservation (40.7% vs. 9.3%, p=0.001), higher median difficulty score (5 vs. 3, p=0.002) but longer operation time (385 vs. 245 minutes, p<0.001). The rate of open conversion tended to be lower with RDP (3.7% vs. 14.7%, p=0.175). Conclusions: In our institution practice, both RDP and LDP were safe and effective. The use of RDP appeared to be complementary to LDP, allowing us to perform more difficult procedures with comparable postoperative outcomes.