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Characterization of available automated external def ibrillators in the market based on the product manuals in 2014

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World Journal of Emergency Medicine 2016年第2期7卷 138-146页

作者： Chik Leung Ho Ka Wai Cheng Tze Hang Ma Yau Hang Wong Ka Lok Cheng chak wah kam Department of Accident and Emergency Medicine Tuen Mun Hospital

BACKGROUND: To popularize the wide-spread use of automated external defi brillator(AED) to save life in sudden cardiac arrest, we compared the strength and weakness of different types of AEDs to enable a sound selection based on regional ***: This was a retrospective descriptive study. Different types of AEDs were compared according to the information of AEDs from manuals and brochures provided by the manufacturers. Fifteen types of AEDs were divided into 3 groups, basic, intermediate and ***: Lifeline? AUTO AED had the best performance in price, portability and user-friendly among AEDs of basic level. It required less time for shock charging. Samaritan PAD defi brillator was superior in price, portability, durability and characteristic among AEDs of intermediate level. It had the longest warranty and highest protection against water and dust. Lifeline? PRO AED had the best performance in most of the criteria among AEDs of advanced level and offered CPR video and manual mode for laypersons and clinicians ***: Lifeline? AUTO AED, Samaritan PAD def ibrillator, Lifeline? PRO AED are superior in AEDs of basic, intermediate and advanced levels, respectively. A feasible AED may be chosen by users according to the regional requirement and the current information about the best available products.

关键词： Automated external defi brillator Electrodes Pads Cardiac arrest

How to secure the connection between thoracostomy tube and drainage system?

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World Journal of Emergency Medicine 2014年第4期5卷 259-263页

作者： Ka Ki Pat Li Kit Shing John Wong Yau Hang Henry Wong Ka Lok Cheng Fung Ling So Chu Leung Lau chak wah kam Department of Accident and Emergency Medicine Pok Oi Hospital Department of Accident and Emergency Medicine Tuen Mun Hospital Clinical Skills Training Centre Tuen Mun Hospital

BACKGROUND: Thoracostomy tube insertion is one of the common bedside procedures in emergency medicine and many acute specialties. Dislodgement of thoracostomy tube from the connection tube of chest drainage system is an important problem with potential complications such as contamination, infection and pneumothorax. Besides, mere loosening can also lead to malfunction. It is a common practice to tape the connection of the system. This study aimed to evaluate the materials and methods of connection of chest drain system to minimize drainage dislodgement. METHODS: We conducted an experimental study to assess the tightness of the connection with various taping materials and methods. We selected three commonly used adhesive materials(3M^(tm) Transpore^(tm) Medical tape, 3M^(tm) Micropore^(tm) Medical tape, 3M^(tm) Soft Cloth Tape on Liner) and three different methods(cross method, straight method, nylon band) to secure the junction between the thoracostomy tube and the bi-conical adaptor in the drainage system. The measured outcome was the weight causing visible loosening of the junction between thoracotomy tube and the ***: For each taping material and taping method, 10 trials were performed. The median weight required to disconnect the junction is 26.22 lb for Transpore^(tm), 31.29 lb for Micropore^(tm) and 32.44 lb for Soft Cloth Tape on Liner. A smaller force was required to disconnect if Transpore^(tm) is used(P<0.001). There was no statistical signifi cant difference between Micropore^(tm) and Soft Cloth Tape on Liner(P=0.98). The median disconnecting force is 32.44 lb for straight taping method, 40.55 lb for cross taping method and 21.15 lb for plastic band. The cross-taping method was the more secure method(P<0.0001 when compared with plastic band)(P=0.033 when compared with straight method).CONCLUSION: Cross-taping is the most secure method among the tested varieties in connecting the thoracostomy tube to the chest drainage system. Transpore^(tm) is

关键词： Thoracostomy tube Drainage system Cross-taping

Schematic interface of sound creation for computer animators

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第7期7卷 1141-1151页

作者： TONG kam-pang Maya WONG kam-wah School of Creative Media City University of Hong Kong Hong Kong China

As an audiovisual medium, computer animations require superior image quality and professional soundtrack to lead audiences into their fascinating virtual world. Without sound, the impact of storytelling is reduced or the story is even not under- standable. Despite the importance of sound, most animators are unfamiliar with sound editing software. Limited budget projects such as independent or student works have difficulty hiring sound professionals to create tailor-made soundtrack. Therefore, we need a suitable sound tool to express their individual ideas. In this paper, we propose an approach using schematic for both computer animation and sound. Our approach provides (1) physical simulation on sound through animation parameters and (2) a new channel for animators to add aesthetic values in sound through their experience of using schematics in existing animation software. We demonstrate our idea through several examples, such as Doppler shift, obstacle effect, importance, energetic, and sputtering effect.

关键词： Computer animation Multimedia Digital media Schematics Physical simulation Aesthetic Sound effects Soundtrack

Meeting the communicative demands in academic and professional training curricula: An overview of ELT in tertiary institutions in Singapore

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外语教学与研究 2001年第4期33卷 258-267页

作者： Ho wah kam TheSingaporeTeachers'Union

This paper focuses on the upper end of the formal Singapore educational spectrum,providing an overview of ELT in polytechnics and universities. It is in four *** order to show continuity between ELT in schools and tertiary institutions,Part 1 explains briefly the nation’s language policy in *** Part 2,an attempt is made to delineate the main trends in ELT in universities and polytechnics and the approaches to ELT generally adopted for mature learners. Part 3 draws attention to the changing emphases in tertiary education in Singapore and to how students are being prepared in innovative ways in ELT for a globalised world and a knowledge based economy. Part 4 provides a summary of the paper.

关键词：英语教学高等院校教学方法语言交际能力

Innovative Therapy of Catastrophic Pelvic Fractures

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Innovative Therapy of Catastrophic Pelvic Fractures

Bayesian variable selection via a benchmark in normal linear models

第17届世界灾难及急救医学学术会议暨第14次全国急诊医学学术年会

作者： kam chak wah A&E Dept. Tuen Mun Hospital Hong Kong

Bleeding in severe pelvic fractures(causing high mortality) does not merely originate from the broken bone marrows,neighbouring venous & arterial vessels,but also the abdo-pelvic *** distant injuries can be the hemorrhage *** significant intra-peritoneal bleeding is initially excluded by the FAST USG,the mainstay hemorrhage control is by the provisional NIPS(non-invasive pelvic stabilization) by a sling/splint to reduce the pelvic volume to create the tamponade effect to reduce venous bleeding

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Statistical Theory and Related Fields 2021年第1期5卷 70-81页

作者： Jun Shao kam-wah Tsui Sheng Zhang KLATASDS-MOE School of StatisticsEast China Normal University ShanghaiPeople’s Republic of China Department of Statistics University ofWisconsin-MadisonMadisonWIUSA

With increasing appearances of high-dimensional data over the past two decades,variable selections through frequentist likelihood penalisation approaches and their Bayesian counterparts becomes a popular yet challenging research area in *** a normal linear model with shrinkage priors,we propose a benchmark variable approach for Bayesian variable *** benchmark variable serves as a standard and helps us to assess and rank the importance of each covariate based on the posterior distribution of the corresponding regression *** a sparse Bayesian analysis,we use the benchmark in conjunction with a modified *** also develop our benchmark approach to accommodate models with covariates exhibiting group *** simulation studies are carried out to assess and compare the performances amongthe proposed approach and other *** real datasets are also analysed by using these methods for illustration.

关键词： Benchmark lasso sparse Bayes shrinkage prior

Cholesky-based model averaging for covariancematrix estimation

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Statistical Theory and Related Fields 2017年第1期1卷 48-58页

作者： Hao Zheng kam-wah Tsui Xiaoning Kang Xinwei Deng Gilead Sciences Inc.Foster CityCAUSA Department of Statistics University ofWisconsin-MadisonMadisonWIUSA International Business College Dongbei University of Finance and EconomicsDalianChina Department of Statistics Virginia TechBlacksburgVAUSA

Estimation of large covariance matrices is of great importance in multivariate *** modified Cholesky decomposition is a commonly used technique in covariance matrix estimation given a specific order of ***,information on the order of variables is often unknown,or cannot be reasonably assumed in *** this work,we propose a Choleskybased model averaging approach of covariance matrix estimation for high dimensional datawith proper regularisation imposed on the Cholesky factor *** proposed method not only guarantees the positive definiteness of the covariance matrix estimate,but also is applicable in general situations without the order of variables being *** simulations are conducted to evaluate the performance of the proposed method in comparison with several other covariance matrix *** advantage of our proposed method is further illustrated by a real case study of equity portfolio allocation.

关键词： High-dimension ensemble estimate Cholesky factor positive definite portfolio strategy

Posterior contraction rate of sparse latent feature models with application to proteomics

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Statistical Theory and Related Fields 2022年第1期6卷 29-39页

作者： Tong Li Tianjian Zhou kam-wah Tsui Lin Wei Yuan Jie Department of Statistics Columbia UniversityNew YorkNYUSA Department of Statistics Colorado State UniversityFort CollinsCOUSA Department of Statistics University of Wisconsin-MadisonMadisonWIUSA Research Institute NorthShore University HealthSystemEvanstonILUSA Department of Public Health Sciences University of ChicagoChicagoILUSA

The Indian buffet process(IBP)and phylogenetic Indian buffet process(pIBP)can be used as prior models to infer latent features in a data *** theoretical properties of these models are under-explored,however,especially in high dimensional *** this paper,we show that under mild sparsity condition,the posterior distribution of the latent feature matrix,generated via IBP or pIBP priors,converges to the true latent feature matrix *** derive the posterior convergence rate,referred to as the contraction *** show that the convergence results remain valid even when the dimensionality of the latent feature matrix increases with the sample size,therefore making the posterior inference valid in high dimensional *** demonstrate the theoretical results using computer simulation,in which the parallel-tempering Markov chain Monte Carlo method is applied to overcome computational *** practical utility of the derived properties is demonstrated by inferring the latent features in a reverse phase protein arrays(RPPA)dataset under the IBP prior model.

关键词： High dimension indian buffet process latent feature Markov chain monte carlo posterior convergence reverse phase protein arrays

Efficient estimation of smoothing spline with exact shape constraints

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Statistical Theory and Related Fields 2021年第1期5卷 55-69页

作者： Vincent Chan kam-wah Tsui Yanran Wei Zhiyang Zhang Xinwei Deng Department of Statistics University of Wisconsin-MadisonMadisonWIUSA Department of Statistics Virginia TechBlacksburgVAUSA

Smoothing spline is a popular method in non-parametric function *** the analysis of data from real applications,specific shapes on the estimated function are often required to ensure the estimated function undeviating from the domain *** this work,we focus on constructing the exact shape constrained smoothing spline with efficient ***‘exact’here is referred as to impose the shape constraint on an infinite set such as an interval in one-dimensional *** the estimation becomes a so-called semi-infinite optimisation problem with an infinite number of *** proposed method is able to establish a sufficient and necessary condition for transforming the exact shape constraints to a finite number of constraints,leading to efficient estimation of the shape constrained *** performance of the proposed methods is evaluated by both simulation and real case studies.

关键词： Monotonicity non-linear constraint non-parametric regression