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Second fundamental forms of holomorphic isometries of the Poincar disk into bounded symmetric domains and their boundary behavior along the unit circle

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Science China Mathematics 2009年第12期52卷 2628-2646页

作者： MOK ngaiming ng Sui Chung Department of Mathematics The University of Hong Kong

Motivated by problems arising from Arithmetic Geometry,in an earlier article one of the authors studied germs of holomorphic isometries between bounded domains with respect to the Bergman *** the case of a germ of holomorphic isometry f:(Δ,λ ds 2Δ ;0) → (Ω,ds 2Ω ;0) of the Poincar disk Δ into a bounded symmetric domain Ω C N in its Harish-Chandra realization and equipped with the Bergman metric,f extends to a proper holomorphic isometric embedding F:(Δ,λ ds 2Δ) → (Ω,ds 2Ω) and Graph(f) extends to an affine-algebraic variety V  C × C *** of F which are not totally geodesic have been *** arise primarily from the p-th root map ρ p:H → H p and a non-standard holomorphic embedding G from the upper half-plane to the Siegel upper half-plane H 3 of genus *** the current article on the one hand we examine second fundamental forms σ of these known examples,by computing explicitly σ *** the other hand we study on the theoretical side asymptotic properties of σ for arbitrary holomorphic isometries of the Poincar disk into *** such mappings expressing via the inverse Cayley transform in terms of the Euclidean coordinate τ=s + it on the upper half-plane H,we have φ(τ)=t 2 u(τ),where u t=0 ≡ *** show that u must satisfy the first order differential equation u t | t=0 ≡ 0 on the real axis outside a finite number of points at which u is *** a by-product of our method of proof we show that any non-standard holomorphic isometric embedding of the Poincar disk into the polydisk must develop singularities along the boundary *** equation φuφt | t=0 ≡ 0 along the real axis for holomorphic isometries into polydisks distinguishes the latter maps from holomorphic isometries into Siegel upper half-planes arising from *** the end of the article we formulate characterization problems for holomorphic isometries suggested both by the theoretical and the computational results of the article.

关键词： holomorphic isometry Poincar disk Siegel upper half-plane second fundamental form asymptotics

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Understanding and reducing the fear of COVID-19

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2020年第9期21卷 752-754页

作者： Kwan Hoong ng Ray KEMP Department of Biomedical Imaging University of MalayaKuala Lumpur 50603Malaysia Ray Kemp Consulting BarringtonCambridgeCB227RRUK

The world is now plagued by a pandemic of unprecedented nature caused by a novel,emerging,and still poorly understood infectious disease,coronavirus disease 2019(COVID-19)(Wu and Mc Googan,2020).In addition to the rap... 详细信息

关键词： COV understood emerging

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Non-merohedrally Twinned Crystal Structure of the Co-crystal Ethyl 6-(2-5-(Ethoxycarbonyl)-pyridin-2-yl-1,2-dihydroxyethyl)pyridine-3-carb-oxylateethyl 6-(2-5-(Ethoxycarbonyl)pyridin-2-yl-2-hydroxyacetyl)pyridine-3-carboxylate(0.69/0.31)

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Chinese Journal of Structural Chemistry 2013年第8期32卷 1159-1162页

作者： ZHAng Wen-Hua ng Seik Weng Institute of Materials Research & Engineering Department of Chemistry University of Malaya Chemistry Department King Abdulaziz University

The two component molecules of the co-crystal 0.69（C18H2ON206）.0.31（C18H18N2O6） lie on a center-of-inversion that exists midway along the ethylene chain connecting the two aromatic rings. The two molecules are superimposed. The crystal is also a non-morohedral twin with a minor 37.7（2）% component. The refinement of this twinned and disordered crystal structure is detailed. Crystal data： C18H19.38N2O6, monoclinic, P21/c, a = 17.1687（8）, b = 5.4389（2）, c = 9.3261（4） A, b = 95.270（5）° and V= 867.18（6） A3 at -173 ℃.

关键词： co-crystal non-merohedral twin

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Analysis of a landfill cover without geomembrane using varied particle sizes of recycled concrete

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第5期15卷 1263-1273页

作者： Charles Wang Wai ng Cheuk Lam ng Junjun Ni Haowen Guo Qi Zhang Qiang Xue Rui Chen Department of Civil and Environmental Engineering Hong Kong University of Science and TechnologyHong KongChina School of Transportation Southeast UniversityNanjingChina State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China Department of Civil and Environmental Engineering Shenzhen Graduate SchoolHarbin Institute of TechnologyShenzhenChina

Previous studies have demonstrated the effectiveness of a novel three-layer landfill cover system constructed with recycled concrete aggregates(RCAs)without geomembrane in both laboratory and ***,no systematic investigation has been carried out to optimize the combination of the particle sizes for fine-grained RCAs(FRC)and coarse-grained RCAs(CRC)that can be used for the three-layer landfill cover *** aim of this paper is to assist engineers in designing the three-layer landfill cover system under a rainfall of 100-year return period in humid climate conditions using an easily controlled soil parameter D10 of *** numerical study reveals that when D10 of FRC increases from 0.05 mm to 0.16 mm,its saturated permeability increases by 10 *** a result,a larger amount of rainwater infiltrates into the cover system,causing a higher lateral diversion in both the top FRC and middle CRC *** further changes in the lateral diversion are observed when the D10 value of FRC is larger than 0.16 *** the particle sizes of FRC and CRC layers are shown to have a minor influence on the percolation under the extreme rainfall *** implies that the selection of particle sizes for the FRC and CRC layers can be based on the availability of *** it is well known that the bottom layer of the cover system should be constructed with very fine-grained soils if possible,this study provides an upper limit to the particle size that can be used in the bottom layer(D10 not larger than 0.02 mm).With this limit,the three-layer system can still minimize the water percolation to meet the design criterion(30 mm/yr)even under a 100-year return period of rainfall in humid climates.

关键词： Capillary barrier Landfill cover Particle size Recycled concrete

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Stem cell therapy for retinal ganglion cell degeneration

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Neural Regeneration Research 2018年第8期13卷 1352-1353页

作者： Ling-Ping Cen Tsz Kin ng Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong Shantou Guangdong Province China Shantou University Medical College Shantou Guangdong China Department of Ophthalmology and Visual Sciences The Chinese University of Hong Kong Hong Kong Special Administrative Region China

The prospects of stem cell therapy for retinal ganglion cell （RGC） degeneration in human： RGC degeneration is a common pathologic cause of glaucoma and optic neuropathies, which are the leading cause of irreversible blindness and visual impairment in developed coun- tries, currently affecting more than 100 million people worldwide.

关键词：干细胞治疗退化房间膜世界范围 RGC 病理学神经病

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Current resistance status of Aedes aegypti and Aedes albopictus populations in Penang Island,Malaysia

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Asian Pacific Journal of Tropical Medicine 2024年第10期17卷 445-455页

作者： Kin Hoong ng Wan Fatma Zuharah Medical Entomology Laboratory School of Biological SciencesUniversiti Sains MalaysiaMalaysia11900PenangMalaysia

Objective:To determine the current insecticide resistance status of Aedes(Ae.)aegypti and *** to four insecticides,namely 0.05%deltamethrin,0.75%permethrin,5%malathion and 0.25%pirimiphos-methyl using the World Health Organisation(WHO)susceptibility test ***:Adult bioassays were carried out using the standard protocol of the World Health *** F1 generation urban and suburban field strains of *** and *** were tested against pyrethroid and organophosphate insecticides,including the presence of piperonyl butoxide(PBO)in four replicates of 25 non-blood-fed female mosquitoes ranging from 3 to 5 days *** Vector Control Research Unit(VCRU)laboratory strain served as a reference ***:In this study,0.05%deltamethrin demonstrated a lower value of knockdown time when 50%of the mosquito population died(KT50)and knockdown time when 95%of the mosquito population died(KT95),which is significantly more effective compared to 0.75%permethrin against adult female ***(urban and suburban)and ***(urban and suburban)(ANOVA,Png to the shorter KT50 and KT95 compared to 0.25%pirimiphos-methyl against ***(urban and suburban)and ***(urban and suburban).*** urban and *** suburban performed a higher resistance ratio(RR)towards both 0.05%deltamethrin and 0.75%permethrin due to the wide use of permethrin in dengue vector control programs in ***,*** urban and suburban have lower resistance than *** urban and suburban towards 0.05%deltamethrin and 0.75%permethrin at 24 hours *** addition of PBO with these insecticides successfully reduced knockdown time(KT50 and KT95)values of most of the *** and *** field strains except PBO+0.75%permethrin against *** ***:The addition of PBO to insecticides has significantly reduced the knockdown time(KT50

关键词： Aedes Insecticide resistance Mosquito Organophosphates Pyrethroids Vector control

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Effects of multiple intravitreal anti-VEGF injections on retinal nerve fiber layer and intraocular pressure: a comparative clinical study

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International Journal of Ophthalmology(English edition) 2013年第2期6卷 211-215页

作者： Güngr Sobaci Riza Güngr Gkhan zge Department of Ophthalmology GATA Medical School Ankara

AIM: To determine the effect of multiple injections of ranibizumab or bevacizumab on retinal nerve fiber layer (RNFL) and intraocular pressure (IOP) in patients with age-related macular degeneration (AMD). ·METHODS: This retrospective study includes 35 eyes of 35 patients treated with intravitreal bevacizumab (IVB, 1.25mg/0.05mL) and 30 eyes of 30 patients with intravitreal ranibizumab (IVR, 0.5mg/0.05mL) who had Fast RNFL analysis (Stratus TM ); IOP measurements were taken 30 minutes and 24 hours after each injection. RESULTS: The mean ages were 68.0±7.5 and 69.1±7.7 years in the IVR and IVB groups, respectively (P =0.55). They underwent (6.3±1.9) and (5.1±1.3) injections (P = 0.07) over (13.6±2.1) and (14.05±2.6) months (P =0.45) in the IVR and IVB groups, respectively. Changes in overall and temporal RNFL thickness in IVR-treated eyes (105.3± 6.9μm and 74.4±11.2μm) were not different from those in untreated eyes in the IVR group (104.6±8.4μm and 75.1±12.6μm) (P =0.57 and P =0.41, respectively). Similarly, overall and temporal RNFL thickness in IVB-treated eyes (105.8±8.1μm and 74.5±11.8μm) were not different from those in untreated eyes in the IVB group (104.6±8μm and 74.8±12.9μm) (P=0.42 and P=0.80, respectively). The frequencies of IOP rise (P=0.60) and changes in RNFL thickness from baseline (P =0.16) were comparable between groups. CONCLUSION: Repeated intravitreal injection of ranibizumab or bevacizumab does not seem have adverse effects on RNFL thickness or IOP in wet AMD patients.

关键词： anti-VEGF bevacizumab ranibizumab retinal nerve fiber layer intraocular pressure adverse effect

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De Broglie–Bohm Interpretation of Canonical Quantum Cosmology Implies Early Stages of the Universe Dominated by Radiation

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Communications in Theoretical Physics 2013年第12期60卷 691-694页

作者： Ch’ng Han Siong Shahidan Radiman School of Applied Physics Faculty of Science and Technology Universiti Kebangsaan Malaysia

The Einstein＇s genera/relativity is formulated in the Hamiltonian form for a spatia/ly Bat, isotropic and homogeneous universe. Subsequently, we perform the canonical quantization procedure to the Hamiltonian to obtain the Wheeler-DeWitt equation. Solving the Wheeler-DeWitt equation and employing the de Broglie-Bohm interpretation to the wave function of the universe, we obtain a new version of spatia/ly fiat Friedmann equation for the early universe where the scale factor of the universe is taken to be sufilcientlv small.

关键词： de Broglie-Bohm interpretation canonical quantum cosmology Friedmann equation Wheeler-DeWitt equation

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ndrogen-deprivation therapy in men with metastatic rostate cancer： less may not necessarily be more

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Asian Journal of Andrology 2013年第4期15卷 445-446页

作者： Mark ng Tang Fui Mathis Grossmann Department of Medicine University of Melbourne Austin Health Heidelberg Victoria 3084 Australia and Endocrinology Austin Health Heidelberg Victoria 3084 Australia

In a pivotal phase 3 randomized con trolled trial, Hussain et al. tested thehypothesis that, with respect to survival, intermittent androgen deprivation therapy （ADT） is noninferior to continuous in men with newly diagnosed metastatic prostate cancer. While the trial findings were statis tically inconclusive, the study suggests, but does not prove, that intermittent may do more harm than good, although findings are not definitive. While outcomes of ongoing trials are awaited, the trial by Hussain et al., in conjunction with an ear lier trial in men with nonmetastatic pro state cancer by Crook et al., does provide important new guidance regarding the choice of ADT in men with androgensensitive prostate cancer. ADT is one of the most effective palliat ive therapies for patients with metastatic prostate cancer, but not without drawbacks. While not as toxic as chemotherapy, ADT carries a significant risk of morbidity, including sexual dysfunction, fatigue, ane mia, accelerated bone loss and fractures, sarcopenia, increased risk of diabetes, and possibly, of cardiovascular events.1＇2 In addition, despite an initial response rate of more than 90%, most patients develop res istance to ADT, resulting in a median sur vival of 2.53 years. Predinical data suggest that continuous use of ADT may accelerate the emergence of resistance to this therapy, and that reexposure of prostate cancer stem cells to androgens can reinduce dif ferentiation and increase their apoptotic potential.3 These ADTassociated shortcom ings, in addition to treatment expense, havespurred the development of strategies to min imize the exposure to ADT, including the use of intermittent ADT. While several smaller randomized controlled clinical trials have compared the use of intermittent with con tinuous ADT, no definitive information is available for patients with metastatic prostate cancer. To fill this evidence gap, a large mul tinational randomized controlled trial led by Hussain et al.4 was designed in

关键词： Androgen-deprivation therapy prostate

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Investigation of drinking water bacterial community through high-throughput sequencing

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Journal of Environmental Sciences 2015年第11期27卷 154-156页

作者： Tsz Wai ng Guocheng Huang Po Keung Wong School of Life Sciences The Chinese University of Hong Kong

Delivery of safe and pathogen-free drinking water is crucial to public ***,there exist challenges to the maintenance of the sterility of drinking water throughout the drinking water distribution systems（DWDS）.Microbial growth in DWDS,such as growth of opportunistic pathogenic microorganisms,can lead to severe health problems in consumers（Berry et al.,2006;Brettar and Hofle,2006;Lu et al.,2014;Zhang et al.,2015）.

关键词： Drinking water distribution systems Microbial community High-throughput sequencing Water safety

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