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polarization-Insensitive All-Optical Time-Division Demultiplexer constructed with a Nonlinear Loop Interferometer

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光学学报 2003年第S1期23卷 589-590页

作者： T.K. Liang c.S. wong H.K. Tsang c. Shu The chinese University of Hong Kong Department of Electronic Engineering Hong Kong ChinaThe Chinese University of Hong Kong Department of Electronic Engineering Hong Kong ChinaThe Chinese University of Hong Kong Department of Electronic Engineering Hong Kong ChinaThe Chinese University of Hong Kong Department of Electronic Engineering Hong Kong China

A polarization-insensitive 40-Gb/s time-division demultiplexer was demonstrated in a polarization-diversity loop configuration. The power penalty was measured to be 2.3 dB at a bit error rates of 10-9 for 10 Gb/s outp... 详细信息

关键词： OTDM et in polarization-Insensitive All-Optical Time-Division Demultiplexer constructed with a Nonlinear Loop Interferometer UNI were FWHM BERT length of with

Facile design of Au@pt core-shell nanostructures： Formation of pt submonolayers with tunable coverage and their applications in electrocatalysis

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Nano Research 2014年第3期7卷 410-417页

作者： Fulin Zheng Wing-Tak wong Ka-Fu Yung Department of Applied Biology and chemical Technology The Hong Kong Polytechnic University Hung Hom Hong Kong SAR China

A facile design of pt nanostructures from submonolayer to monolayer has been realized by ion adsorption-in situ electrochemical reduction on Au nanoparticles supported on multiwall carbon nanotubes （cNTs）. The as prepared Au@pt/cNTs catalysts display coverage-specific electrocatalysis. Au@pt/cNTs with low pt coverage is inactive towards methanol oxidation whereas it oxidizes formic acid effectively through a direct pathway with mass specific activity 90 times that of a commercial pt/c catalyst. Due to its inertness to methanol, it shows high performance in the oxygen reduction reaction （ORR） with high methanol tolerance. In contrast, simply increasing the pt coverage to above 40% switches the formic acid oxidation process to both direct and indirect catalytic pathways, and also results in high methanol oxidation activity.

关键词： electrocatalysis platinum submonolayer fuel cell

Design and fabrication of automated sedimentation-based separation and siphon-based extraction for detection of allergic reaction on a centrifugal microfluidic disc

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chinese Optics Letters 2010年第10期8卷 957-959页

作者： Q. L. chen H. p. Ho K. L. cheung S. K. Kong Y. K. Suen Y. W. Kwan c. K. wong center for Advanced Research in photonics and Department of Electronic Engineering The Chinese University of Hong Kong Hong Kong China Department of Biochemistry The Chinese University of Hong Kong Hong Kong China School of Biomedical Sciences The Chinese University of Hong Kong Hong Kong China Department of chemical pathology The Chinese University of Hong Kong Hong Kong China

We report the design and fabrication of a novel and fully integrated polymer-based centrifugal microfluidic disc for rapid automatic allergens detection. All essential steps for a single test including flow valving, sequencing, mixing, separation, extraction, and sedimentation for final detection are automatically conducted within 30 min on a centrifugal microfluidic disc. Our design features a siphon-based valving and analyte extraction structure where the released analyte is separated and subsequently extracted by a siphon valve into the detection chamber. Incorporating the siphon valve and a series of capillary valves, we realize automated detection of allergic reaction on a centrifugal microfluidic disc.

关键词： Adaptive optics Diffuse optical imaging photolithography polydimethylsiloxane polymethyl methacrylate

The Hong Kong Arbitration Draft Bill : The Way Forward?

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武汉仲裁 2008年第1期3卷 85-93页

作者： Samuel c.c.wong FcIArb FHKIArb Barrister-at-Law

The Hong Kong Arbitration Draft Bill will be released very soon and a period of consultation will begin. This paper seeks to increase awareness about the Draft Bill and to stimulate discussion on the key issues it raises. Firstly, it will give a brief account of the existing Arbitration Ordinance and discuss why it needs to be amended. Secondly, it will outline some of the main features of the Draft Bill. Finally, it will discuss some of the main issues surrounding the bill^whether the bill as drafted is user-friendly;whether a unitary UNcITRAL regime should be adopted with the distinction between domestic and international arbitration eliminated;whether there should be a right of appeal in domestic arbitrations.

关键词： Hong Kong Arbitration Draft Bill

Novel role of STAT3 in microglia-dependent neuroinflammation after experimental subarachnoid haemorrhage

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Stroke & Vascular Neurology 2022年第1期7卷 62-70页

作者： Zhiyuan Vera Zheng Junfan chen Hao Lyu Sin Yu Erica Lam Gang Lu Wai Yee chan George K c wong Department of Surgery The Chinese University of Hong KongShatinHong Kong Department of Surgery Hainan General HospitalHaikouHainanChina School of Biomedical Science The Chinese University of Hong KongShatinHong Kong

Background and purpose Signal transducer and activator of transcription 3(STAT3)may contribute to the proinflammation in the central nervous system diseases by modulating the microglial ***,this study was intended to investigate the effect of STAT3 on microglia-dependent neuroinflammation and functional outcome after experimental subarachnoid haemorrhage(SAH).Methods The SAH model was established by endovascular perforation in the ***-time pcR(RtpcR)and western blot were used to examine the dynamic STAT3 signalling pathway responses after *** clarify the role of the STAT3 signalling pathway in the microglia-dependent neuroinflammation after SAH,the microglia-specific STAT3 knockout(KO)mice were generated by the cre-Loxp *** neurological functions were assessed by catwalk and Morris water maze *** loss after SAH was determined by immunohistochemistry *** polarisation status after STAT3 KO was then examined by RtpcR and *** The STAT3 and Janus kinase-signal transducer 2 activated immediately with the upregulation and phosphorylation after *** factors and related mediators altered dynamically and *** STAT3 deletion ameliorated the neurological impairment and alleviated the early neuronal loss after *** investigate the underlying mechanism,we examined the microglial reaction after STAT3 ***3 deletion reversed the increase of microglia after *** of STAT3 triggered the early morphological changes of microglia and primed microglia from M1 to M2 ***,microglial STAT3 deletion suppressed the SAH-induced proinflammation and promoted the anti-inflammation in the early *** STAT3 is closely related to the microglial polarisation transition and modulation of microglia-dependent *** STAT3 deletion improved neurological function and neuronal survival probably through promoting M2 polarisation and anti-inf

关键词： STAT3 inflammation reversed

A REAcTIVE DYNAMIc cONTINUUM USER EQUILIBRIUM MODEL FOR BI-DIREcTIONAL pEDESTRIAN FLOWS

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Acta Mathematica Scientia 2009年第6期29卷 1541-1555页

作者： Yanqun Jiang Tao Xiong S.c. wong chi-Wang Shu Mengping Zhang peng Zhang William H.K. Lam Department of Mathematics University of Science and Technology of China Hefei 230026 China Department of civil Engineering The University of Hong Kong Hong Kong China Division of Applied Mathematics Brown University Providence RI 02912 U.S.A. Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China Department of civil and Structural Engineering The Hong Kong Polytechnic University Hong Kong China

In this paper, a reactive dynamic user equilibrium model is extended to simulate two groups of pedestrians traveling on crossing paths in a continuous walking facility. Each group makes path choices to minimize the travel cost to its destination in a reactive manner based on instantaneous information. The model consists of a conservation law equation coupled with an Eikonal-type equation for each group. The velocity-density relationship of pedestrian movement is obtained via an experimental method. The model is solved using a finite volume method for the conservation law equation and a fast-marching method for the Eikonal-type equation on unstructured grids. The numerical results verify the rationality of the model and the validity of the numerical method. Based on this continuum model, a number of results, e.g., the formation of strips or moving clusters composed of pedestrians walking to the same destination, are also observed.

关键词： pedestrian flows conservation law Eikonal-type equation density-velocity relationship finite volume method fast marching method unstructured grids

Identification of potential nitric oxide-sensing proteins using the H-NOX motif

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Molecular plant 2021年第2期14卷 195-197页

作者： Aloysius wong Xuechen Tian Yixin Yang christoph Gehring Department of Biology College of Science and TechnologyWenzhou-Kean University88 Daxue RoadOuhaiWenzhouZhejiang Province 325060China Department of chemistry Biology&BiotechnologyUniversity of Perugia06121 PerugiaItaly

NO Sensing Is Universal and Ancient During the anoxic stages of the early Earth,nitric oxide(NO)served as a major nitrogen source for prokaryotes,which,against a backdrop of an increasingly oxygen-rich atmosphere,evolved NO signaling mechanisms for processes including the regulation of communal behavior(plate and Marietta,2012).In humans,NO lowers blood pressure,acts as neurotransmitter,and activates macrophages during immune responses(Farah et al.,2018).Animal NO-sensing proteins share structural similarity with those of early prokaryotes,as exemplified by the activation of soluble guanylate cyclases(sGcs),in which a heme-containing domain enables NO sensing by the heme NO/oxygen(H-NOX),thus indicating ancient evolutionary *** plants,NO signals for defense,growth,and developmental processes(Durner et al.,1998;Domingos et al.,2015)appeared to occur mainly through protein S-nitrosation,where the redox changes of sensing proteins could directly modulate enzymatic activities thereby causing the release of reactive oxygen intermediates,or by alteration of methylation patterns of defense genes that,in turn,affect programmed cell death during stress responses(Tada et al.,2008;Yun et al.,2011;Hu et al.,2017).

关键词： Marie nitric thereby

“On Its Own Terms”:Butterfly-Saturday Fiction in the Xiaoshuo Tradition

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comparative Literature:East & West 2007年第2期 17-30页

作者： Timothy c.wong Arizona State University

一直到二十世纪的初旬,中国小说经常被视为"小"文学,为"茶余饭后"的消遣读品。就算过去曾经有像金圣叹的拥护者,一般人觉得小说不能"登大雅之堂"。这个观念受到晚清革新者梁启超(1873-1929)的提议才开始改变。梁提倡利用小说"不可思议之... 详细信息

一直到二十世纪的初旬,中国小说经常被视为"小"文学,为"茶余饭后"的消遣读品。就算过去曾经有像金圣叹的拥护者,一般人觉得小说不能"登大雅之堂"。这个观念受到晚清革新者梁启超(1873-1929)的提议才开始改变。梁提倡利用小说"不可思议之力"来"新"中国人的种种守旧思想和习惯。这样一下子就把小说的轻佻性质严肃起来,同时也把小说的地位提高了。问题是一般人就直接把中国旧小说和欧美和日本的严肃虚构叙事文学合一了,不再思考中国小说对读者吸引力的原因。可是中国人对小说的原来观念没有被完全埋没。尤其是在二十和三十年代的上海,所谓"鸳鸯蝴蝶—礼拜六"的消遣小说,要比那些要改良国民的"五四"小说流行的多。那些小说被称为"旧派",因为,像过去的小说,虚构的目的是跟当今小说相反,要把读者脱离了平凡现实,暂时放开生活的各种困难和无聊。理解"鸳鸯蝴蝶-礼拜六"小说就能让我们理解中国小说的传统—为什么小说以前被视为下等文学,可是为什么人人都要争着看读,同时也让我们知道我们不但要研究中国跟外国小说的相同;要真正理解人类的虚构叙事传统,我们应该也研究中国跟外国小说的差别。

关键词：叙事文学叙事传统 fiction Butterfly 金圣叹 story essay revolu

Synthesis and enhanced piezoelectric response of cVD-grown SnSe layered nanosheets for flexible nanogenerators

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Nano Research 2023年第9期16卷 11839-11845页

作者： Fumei Yang Man-chung wong Jianfeng Mao Zehan Wu Jianhua Hao Department of Applied physics the Hong Kong Polytechnic UniversityHong Kong 999077China

piezoelectricity is the electric charge which accumulates in certain materials in response to mechanical stimuli,while piezoelectric nanogenerators(pENGs)converting mechanical energy into electricity can be widely used for energy harvesting and self-powered *** group IV-VI monochalcogenides may exhibit strong piezoelectricity because of their puckered c_(2v)symmetry and electronic structure,making them promising for flexible ***,we investigated the synthesis and piezoelectric properties of multilayer SnSe nanosheets grown by chemical vapor deposition(cVD).The SnSe nanosheets exhibited high single-crystallinity,large area,and good *** strong layer-dependent in-plane piezoelectric coefficient of SnSe nanosheets showed a saturated trend to be~110 pm/V,which overcomes the weak piezoelectric response or odd-even effects in other layered nanosheets.A high energy conversion efficiency of 9.3%and a maximum power density of 538 mW/cm^(2)at 1.03%strain have been demonstrated in a SnSe-based *** on the enhanced piezoelectricity of SnSe and attractive output performance of the nanogenerator,a self-powered sensor for human motion monitoring is further *** results demonstrate the strong piezoelectricity in high quality cVD-grown SnSe nanosheets,allowing for application in flexible smart piezoelectric sensors and advanced microelectromechanical devices.

关键词： SnSe piezotronics piezoresponse force microscope piezoelectric nanogenerator self-powered device