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A WiMAX-ZigBee Energy Management System for Green Education

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Smart Grid and Renewable Energy 2011年第4期2卷 338-348页

作者： Hoi Yan Tung Kim Fung Tsang Ka Lum Lam Hoi Ching Tung Rong Jian Zheng king tim ko Loi Lei Lai 不详

A WiMAX-ZigBee energy management system for green education has been developed. The system helps to resolve the disgusting environmental problems. This paper explores the concept of energy management and introduces an Energy Management System located at campus areas. Analysis shows that 30% energy can be saved from the total energy consumption which translates to a saving of 72 thousand million kWh of energy annually. Such saving reduces 48 million tons of CO2 emission for the environment.

关键词： Energy Management Minimizing CO2 Generation WiMAX ZigBee Green Education

Advanced Metering Infrastructure for Electric Vehicle Charging

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Smart Grid and Renewable Energy 2011年第4期2卷 312-323页

作者： Lun Ka Lam king tim ko Hoi Yan Tung Hoi Ching Tung Wah Ching Lee Kim Fung Tsang Loi Lei Lai 不详

The widely adoption of Electric Vehicle (EV) has been identified as a major challenge for future development of smart grids. The ever increasing electric vehicle charging further increases the energy demand. This paper reports the development of an Advanced Metering Infrastructure (AMI) as an effective tool to reshape the load profile of EV charging by adopting appropriate demand side management strategy. This paper presents a total solution for EV charging service platform (EVAMI) based on power line and internet communication. It must be stressed that the development of Third Party Customer Service Platform in this investigation facilitates a single bill to be issued to EV owners. Hence, EV owners understand their energy usage and thus may perform energy saving activity efficiently. Experiment and evaluation of the proposed system show that the throughput achieved is about 5 Mbps at 10 ms end to end delay in Power line Communication. By introducing two dimensional dynamic pricing and charging schedule, the proposed EVAMI successfully reduces 36% peak consumption and increases the “off peak” consumption by 54%. Therefore the EVAMI does not only reduce the peak consumption but also relocates the energy demand effectively.

关键词： Electric Vehicle Charging Advanced Metering Infrastructure Power Line Communication Demand Response

A Study of Address Shortage in a Tree Based ZigBee Network for Mobile Health Applications

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Wireless Sensor Network 2012年第5期4卷 147-153页

作者： Ka Lun Lam Hoi Yan Tung king tim ko Kim Fung Tsang Hoi Ching Tung Yat Wah Leung Wing Hong Lau Department of EE City University of Hong Kong Hong Kong China Department of SEEM City University of Hong Kong Hong Kong China

There are increasing demands for mobile health applications. This paper reports the development of a mobile health profile which dedicates to mobile applications. The mobile health profile is developed in association with the ZigBee Health Care profile and the IEEE 11073 standard which is normally applied to non-mobile applications. Since mobile sensors have to be carried by patients, the mobile health profile must facilitate mobility. In this investigation, a ZigBee fixed-mobile network (ZFMN) is defined and developed to supplement the ZigBee Health Care Profile for patient monitoring. The mobility study of ZigBee is performed using a random waypoint OPNET simulation model. In a ZFMN, the critical issue of address shortage is identified and discussed. It is analyzed that the problematic address shortage in a ZFMN may generate a huge amount of orphaned end devices and thus the packet drop percentage may potentially rise to 70%, rendering the network unable to function properly. Without introducing additional governing schemes, it is evaluated that the communication of the entire ZigBee network may paralyze. Further vigorous test are performed (by OPNET) on the communication capability of ZFMN when devices are randomly moving and sending data in 1s. It is vital to point out that under the adverse condition of address shortage, the performance of a ZFMN is still encouraging as long as the packet drop percentage has been kept below 3% before running out of address. The conclusion drawn in this analysis is that the packet drop percentage should be kept below 3% to provide a satisfactory QoS for an effective mobile health application using ZFMN such as patient monitoring. Such finding is also important for other future mobile application design of ZigBee. The address shortage issue is left as an open problem that needs attention for a resolution.

关键词： Mobile Health Patient Monitoring Mobility ZigBee Tree Address Assignment Address Shortage

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监管部门反对英伟达放弃收购Arm

商业周刊（中文版） 2022年第2期 14-15页

作者： Ian king tim Culpan 邵璐宁(译) 不详

据彭博新闻社2022年2月8日报道,Nvidia Corp.(英伟达)放弃从软银集团手中收购Arm Ltd.(安谋),此举是屈服于监管部门反对。本会成为芯片行业最大规模的一笔交易就此告吹。软银目前计划推进Arm的首次公开募股(IPO)以替代上述交易。Arm首... 详细信息

据彭博新闻社2022年2月8日报道,Nvidia Corp.(英伟达)放弃从软银集团手中收购Arm Ltd.(安谋),此举是屈服于监管部门反对。本会成为芯片行业最大规模的一笔交易就此告吹。软银目前计划推进Arm的首次公开募股(IPO)以替代上述交易。Arm首席执行官Simon Segars已辞职,将工作交接给了总裁Rene Haaso此举与交易的终止无关。

关键词：彭博新闻社工作交接首席执行官监管部门收购 Nvidia

A critical role of IL-17 in modulating the B-cell response during H5N1 influenza virus infection

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Cellular & Molecular Immunology 2011年第6期8卷 462-468页

作者： Xiaohui Wang Chris CS Chan Min Yang Jun Deng Vincent KM Poon Virtual HC Leung king-Hung ko Jie Zhou Kwok Yung Yuen Bo-Jian Zheng Liwei Lu Department of Pathology The University of Hong KongHong KongChina Department of Microbiology The University of Hong KongHong KongChina Center of Infection and Immunology The University of Hong KongHong KongChina

Interleukin-17(IL-17),a member of the IL-17 cytokine family,plays a crucial role in mediating the immune response against extracellular bacteria and fungi in the *** there is increasing evidence that IL-17 is involved in protective immunity against H1 and H3 influenza virus infections,little is known about the role of IL-17 in the highly pathogenic H5N1 influenza virus *** this study,we show that H5N1-infected IL-17 knockout(ko)mice exhibit markedly increased weight loss,more pronounced lung immunopathology and significantly reduced survival rates as compared with infected wild-type ***,the frequency of B cells in the lung were substantially decreased in IL-17 ko mice after virus infection,which correlated with reduced CXCR5 expression in B cells and decreased CXCL13 production in the lung tissue of IL-17 ko *** with this observation,B cells from IL-17 ko mice exhibited a significant reduction in chemokine-mediated migration in *** together,these findings demonstrate a critical role for IL-17 in mediating the recruitment of B cells to the site of pulmonary influenza virus infection in mice.

关键词： B cell H5N1 influenza virus IL-17 lung infection

Leptin Signaling Protects NK Cells from Apoptosis During Development in Mouse Bone Marrow

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Cellular & Molecular Immunology 2009年第5期6卷 353-360页

作者： Cherry Kam Chun Lo Queenie Lai Kwan Lam Min Yang king-Hung ko Lingyun Sun Rui Ma Shengjun Wang Huaxi Xu Sidney Tam Chang-You Wu Bo-Jiang Zheng Liwei Lu Departments of Pathology and Microbiology Center of Infection andImmunology The University of Hong Kong Hong Kong China Department of Rheumatology Drum Tower Hospital Nanjing UniversityMedical School Nanjing China Department of Immunology School of Medical Science and LaboratoryMedicine Jiangsu University. Zhenjiang China epartment of Pathology Queen Mary Hospital Hong Kong China Department of Immunology Sun Yat-Sen University Guangzhou China These authors contributed equally to this work Department of Pathology and Center of Infection and Immunology The University of Hong Kong Pokfulam Road Hong Kong China

Increasing evidence indicates a role of leptin in immune response, but it remains largely unclear whether leptin signaling is involved in regulating NK cell development in the bone marrow （BM）. In this study, we have characterized NK cell differentiation and maturation in the BM of leptin-receptor deficient db/db mice at a prediabetic stage. Although the BM cellularity was similar to the control value, the total number of NK cells was severely reduced in mutant mice. Flow cytometric analysis of db/db BM cells revealed significantly decreased frequencies of developing NK cells at various stages of differentiation. BM db/db NK cells displayed markedly increased apoptosis but maintained normal cell cycling status and proliferative capacity. Moreover, recombinant leptin could significantly enhance the survival of NK cells from wild-type mice in cultures. Further examination on NK cell functional activity showed that db/db NK cells exhibited normal intrinsic cytotoxicity with significantly increased IL-10 production. Taken together, our findings suggest that leptin signaling regulates NK cell development via enhancing the survival of immature NK cells in mouse BM.

关键词： NK cell bone marrow lymphocyte development

Rasch validation of the Chinese parent-child interaction scale (CPCIS)

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World Journal of Pediatrics 2018年第3期14卷 238-246页

作者： Patrick Ip Winnie Tso Nirmala Rao Frederick Ka Wing Ho ko Ling Chan king Wa Fu Sophia Ling Li Winnie Goh Wilfred Hing-sang Wong Chun Bong Chow Department of Pediatrics and Adolescent Medicine University of Hong KongHong KongPeople's Republic of China Faculty of Education University of Hong KongRoom 510Meng Wah ComplexHong KongPeople's Republic of China Department of Applied Social Sciences The Hong Kong Polytechnic UniversityHong KongPeople's Republic of China Journalism and Media Studies Center The University of Hong KongHong KongPeople's Republic of China KK Women's and Children's Hospital SingaporeSingapore

Background Proper parent-child interaction is crucial for child development, but an assessment tool in Chinese is currently lacking. This study aimed to develop and validate a parent-reported parent-child interaction scale for Chinese preschool children. Methods The Chinese parent-child interaction scale (CPCIS) was designed by an expert panel based on the literature and clinical observations in the Chinese context. The initial CPCIS had 14 parent-child interactive activity items. Psychometric properties of the CPCIS were examined using the Rasch model and confirmatory factor analysis (CFA). Convergent validity was investigated by the associations between CPCIS and family income, maternal education level, and children's school readiness. Results The study recruited 567 Chinese parent-child pairs from diverse socioeconomic backgrounds, who completed the CPCIS. Six out of the 14 items in the initial CPCIS were dropped due to suboptimal fi t values. The refined 8-item CPCIS was shown to be valid and reliable by Rasch models and CFA. The person separation reliability and Cronbach's α of the CPCIS were 0.81 and 0.82, respectively. The CPCIS scores were positively associated with family's socioeconomic status (η2 = 0.05,P < 0.001), maternal education level (η2 = 0.08,P < 0.001), and children's school readiness (η2 = 0.01,P < 0.01). Conclusion CPCIS is an easily administered, valid, and reliable tool for the assessment of parent-child interactions in Chinese families.

关键词： Chinese Early childhood Home learning environment Parent-child interaction Validation

Semiconductor UV photonics: feature introduction

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Photonics Research 2019年第12期7卷 I0003-I0004页

作者： XIAOHANG LI RUSSELL D.DUPUIS tim WERNICKE king Abdullah University of Science and Technology(KAUST) Advanced Semiconductor LaboratoryThuwal 23955-6900Saudi Arabia School of Electrical and Computer Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332USA Technische Universitat Berlin Institute of Solid State PhysicsBerlin D-10623Germany

Semiconductor UV photonics research has emerged as one of the most heavily invested areas among semiconductor photonics research due to numerous crucial applications such as sterilization,sensing,curing,and *** feature issue disseminates nine timely original research and two review papers from leading research groups and companies,covering most frontiers of the semiconductor UV photonics research,from epitaxy,device physics and design,nanostructures,fabrication,packaging,reliability,and application for light-emitting diodes,laser diodes,and photodetectors.

关键词： companies photonics frontier

Pluronic L-81 ameliorates diabetic symptoms in db/db mice through transcriptional regulation of microsomal triglyceride transfer protein

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World Journal of Gastroenterology 2009年第24期15卷 2987-2994页

作者： Wo-Shing Au Li-Wei Lu Sidney Tam Otis king Hung ko Billy KC Chow Ming-Liang He Samuel S Ng Chung-Man Yeung Ching-Chiu Liu Hsiang-Fu Kung Marie C Lin Institute of Molecular Technology for Drug Discovery and Synthesis Department of Chemistry The University of Hong Kong Hong Kong China Department of Pathology The University of Hong Kong Hong Kong China Division of Clinical Biochemistry Queen Mary Hospital Hong Kong China School of Biological Sciences The University of Hong Kong China Stanley Ho Center for Emerging Infectious Diseases The Chinese University of Hong Kong Shatin Hong Kong China

AIM: To test whether oral L-81 treatment could im-prove the condition of mice with diabetes and to investigate how L-81 regulates microsomal triglyceride transfer protein (MTP) activity in the liver. METHODS: Genetically diabetic (db/db) mice were fed on chow supplemented with or without L-81 for 4 wk. The body weight, plasma glucose level, plasma lipid profile, and adipocyte volume of the db/db mice were assessed after treatment. Toxicity of L-81 was also evaluated. To understand the molecular mecha-nism, HepG2 cells were treated with L-81 and the effects on apolipoprotein B (apoB) secretion and mRNA level of the MTP gene were ***: Treatment of db/db mice with L-81 sig-nificantly reduced and nearly normalized their body weight, hyperphagia and polydipsia. L-81 also markedly decreased the fasting plasma glucose level, improved glucose tolerance, and attenuated the elevated levels of plasma cholesterol and triglyceride. At the effective dosage, little toxicity was observed. Treatment of HepG2 cells with L-81 not only inhibited apoB secretion, but also signif icantly decreased the mRNA level of the MTP gene. Similar to the action of insulin, L-81 exerted its effect on the MTP promoter. CONCLUSION: L-81 represents a promising candidate in the development of a selective insulin-mimetic mol-ecule and an anti-diabetic agent.

关键词：酯转运蛋白抗糖尿病甘油三酯微粒体小鼠 db 转录调控基因表达水平