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On p^(j)-rank of Even K-groups of Rings of Integers

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Acta Mathematica Sinica,English Series 2024年第10期40卷 2481-2496页

作者： Meng Fai lim School of Mathematics and Statistics&Hubei Key Laboratory of Mathematical Sciences Central China Normal UniversityWuhan 430079P.R.China

Let L/F be a finite Galois extension of number fields of degree n and let p be a prime which does not divide *** shall study the p^(j)-rank of K_(2i)(O_(L))via its Galois module structure following the approaches of Iwasawa and Komatsu–*** the way,we generalize previous observations of Browkin,Wu and Zhou on K_(2)-groups to higher even *** also give examples to illustrate our ***,we apply our discussion to refine a result of Kitajima pertaining to the p-rank of even K-groups in the cyclotomic Z_(l)-extension,where l≠p.

关键词： p^(j)-rank even K-groups rings of integers

Neuroendocrine tumor metastatic to the orbit treated with radiotherapy

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World Journal of Gastrointestinal Oncology 2013年第8期5卷 177-180页

作者： Renata D'Alpino Peixoto Howard John lim Winson y Cheung Department of Medical Oncology BC Cancer Agency

Neuroendocrine tumors are rare neoplasms that infrequently metastasize to the *** that patients with these tumors may have prolonged survival despite dissemination,maintaining quality of life by providing early diagnosis and effective treatment to preserve vision and comfort is a fundamental *** report the case of a79-year old woman who presented with well-differentiated metastatic neuroendocrine tumor to the liver with no carcinoid syndrome and was started on intramuscular long-acting octreotide with disease *** years later she developed right-sided diplopia associated with mild eye discomfort,proptosis and *** magnetic resonance imaging showed a 2.1 cm mass in the right orbit and further biopsy confirmed a neuroendocrine tumor *** patient was treated with a four-week course of stereotactic radiotherapy to the right orbital metastasis(4000 cGy in 20 fractions)with minor conjunctivitis as the only side *** months later,she remains well with no visual loss.

关键词： Neuroendocrine tumor Carcinoid tumor Orbital metastases Diplopia Radiotherapy

Characterization for Fusion Candidate Vanadium Alloys

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Plasma Science and technology 2004年第4期6卷 2395-2399页

作者： t.Muroga t.Nagasaka J.M.Chen Z.y.Xu Q.y.Huang y.C.Wu NationalInstituteforFusionScience Toki509-5292Japan SouthwesternInstituteofPhysics Chengdu610041China InstituteofPlasmaPhysics ChineseAcademyofSciencesHefei230031China

this paper summarizes recent achievements in the characterization ofcandidate vanadium alloys obtained for fusion in the framework of the Japan-China Core UniversityProgram. National Institute for Fusion Science (NIFS) has a program of fabricating high-purityV-4Cr-4ti alloys. the resulting products (NIFS-HEAt-1,2), were characterized by various researchgroups in the world including Chinese partners. South Western Institute of Physics (SWIP) fabricateda new V-4Cr-4ti alloy (SWIP-Heat), and carried out a comparative evaluation of hydrogenembrittlement of NIFS-HEAts and SWIP-Heat. the tensile test of hydrogen-doped alloys showed that theNIFS-HEAt maintained the ductility to relatively high hydrogen levels. the comparison of the datawith those of previous studies suggested that the reduced oxygen level in the NIFS-HEAts should beresponsible for the increased resistance to hydrogen embrittlement. Based on the chemical analysisdata of NIFS-HEAts and SWIP-Heats, neutron-induced activation was analyzed in Institute of PlasmaPhysics (IPP-CAS) as a function of cooling time after the use in the fusion first wall. the resultsshowed that the low level of Co dominates the activity up to 50 years followed by a domination of Nbor Nb and Al in the respective alloys. It was suggested that reduction of Co and Nb, both of whichare thought to have been introduced via cross-contamination into the alloys from the molds usedshould be crucial for reducing further the activation.

关键词： vanadium alloys characterization nuclear fusion

Effect of Duct Geometry on Shock Wave Discharge

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Journal of thermal Science 2006年第4期15卷 349-354页

作者： y.-H.Kweon y.Miyazato t.Aoki H.-D.Kim t.Setoguchi Department of Energy and Environmental Engineering Kyushu UniversityKasuga 816-8580Japan Faculty of Environmental Engineering The University of KitakyushuKitakyushu 808-0135Japan School of Mechanical Engineering Andong National UniversityAndong 760-749Korea Department of Mechanical System Engineering Saga UniversitySaga 840-8502Japan

this paper describes computational work to understand the unsteady flow-field of a shock wave discharging from an exit of a duct and impinging upon a flat plate. A flat plate is located downstream, and normal to the axis of the duct. the distance between the exit of the duct and flat plate is changed. In the present study, two different duct geometries （i.e., square and cross section） are simulated to investigate the effect of duct geometry on the un-steady flows of a shock wave. In computation, the total variation diminishing （tVD） scheme is employed to solve three-dimensional, unsteady, compressible, Euler equations. Computations are performed over the range of shock Mach number from 1.05 to 1.75. Computational results can predict the three-dimensional dynamic behaviour of the shock wave impinging upon the flat plate. the results obtained show that the pressure increase generated on the plate by the shock impingement depends on the duct geometry and the distance between the duct exit and plate, as well as the shock Mach number. It is also found that for the duct with cross-section, the unsteady loads acting on the flat plate are less, compared with the square duct.

关键词： unsteady flow compressible flow shock wave shock impingement duct geometry

Cydodextrin conjugated ferritin nanocages reduce intracellular cholesterol level in foam cells

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Nano Research 2019年第12期12卷 2925-2932页

作者： Samyukta Ravishankar Sierin lim School of Chemical and Biomedical Engineering Nanyang Technological University70 Nanyang DriveBlk N1.3Singapore 637457Singapore NtU-Northwestem Institute for Nanomedicine Nanyang Technological University50 Nanyang DriveBlk N3.1Singapore 637553Singapore

Accumulation of lipid-laden macrophages(foam cells)is characteristic of atherosclerosis developme nt in the arterial *** nano cages have been found to passively accumulate in the atherosclerotic *** has been actively investigated as a carrier for contrast agents in atherosclerosis diag no *** dem on strate the pote ntial of ferritin as a carrier for therapeutic molecules to mediate cholesterol reducti on from foam *** molecules are chemically conjugated to the ferritin anocages surface or encapsulated within the nanocages using metal co-loadi ng *** cyclodextrin-conjugated ferriti n has nano molar affinity to cholesterol *** of foam cells with the conjugates shows decreased levels of intracellular accumulated *** preferential localization of ferritin to foam cells is due to transferrin receptor-mediated endocytosis *** findings show that ferritin nanocages as carriers localize cyclodextrin molecules to foam cells which mediate intracellular cholesterol reductio n,thus highlight!ng its potential use as a therapeutic agent.

关键词： cyclodextrin ferritin protein nanocages cholesterol sequestration foam cells

Performance assessment of innovative seismic resilient steel knee braced frame

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Frontiers of Structural and Civil Engineering 2016年第3期10卷 291-302页

作者： tony t. y. yANG yuanjie LI International Joint Research Laboratory of Eearthquake Engineering 1239 Siping Road Shanghai 200002 China Department of Civil Engineering University of British Columbia Vancouver BC V6T1Z4 Canada

Buckling restrained knee braced truss moment frame （BRKBtMF） is a novel and innovative steel structural system that utilizes the advantages of long-span trusses and dedicated structural fuses for seismic applications. Steel trusses are very economical and effective in spanning large distance. However, conventional steel trusses are typically not suitable for seismic application, due to its lack of ductility and poor energy dissipation capacity. BRKBtMF utilizes buckling restrained braces （BRBs） as the designated structural fuses to dissipate the sudden surge of earthquake energy. this allows the BRKBtMF to economically and efficiently create large span structural systems for seismic applications. In this paper, a prototype BRKBtMF office building located in Berkeley, California, USA, was designed using performance-based plastic design procedure. the seismic performance of the prototype building was assessed using the state-of-the-art finite element software, OpenSees. Detailed BRB hysteresis and advanced element removal technique was implemented. the modeling approach allows the simulation for the force-deformation response of the BRB and the force redistribution within the system after the BRBs fracture. the developed finite element model was analyzed using incremental dynamic analysis approach to quantify the seismic performance of BRKBtMF. the results show BRKBtMF has excellent seismic performance with well controlled structural responses and resistance against collapse. In addition, life cycle repair cost of BRKBtMF was assessed using the next-generation performance-based earthquake engineering framework. the results confirm that BRKBtMF can effectively control the structural and non-structural component damages and minimize the repair costs of the structure under different ranges of earthquake shaking intensities. this studies conclude that BRKBtMF is a viable and effective seismic force resisting system.

关键词： buckling restrained brace innovative structural system collapse simulation seismic assessment

Architecture for mobile group communication in campus environment

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Frontiers of Computer Science 2013年第4期7卷 505-513页

作者： yujin lim Sanghyun AHN Department of Information Media University of Suwon Hwaseong 445-743 Korea School of Computer Science University of Seoul Seoul 130-743 Korea

the demand for group communication using smart devices in campus environment is increasing rapidly. In this paper, we design an architecture for a mobile group communication system （MGCS） on campus by using Wi-Fi networks and smart devices. the architecture is composed of a web-based system and a smart device based mobile system. through the systems, users on campus create community/mobile group, maintain dynamic group membership, and reliably deliver the message to other users. We use the common features of many smart devices to develop a prototype that works on off-the-shelf hardware. In the experimental section, we demonstrate our system using various real scenarios which can occur in university campuses.

关键词： smart campus smartphone location tracking,mobile community

Polarity control of carrier injection for nanowire feedback field-effect transistors

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Nano Research 2019年第10期12卷 2509-2514页

作者： Doohyeok lim Sangsig Kim Department of Electrical Engineering Korea University145 Anam-roSeongbuk-guSeoul 02841Republic of Korea

We present polarity control of the carrier injection for a feedback field-effect transistor(FBFEt)with a selectively thinned p^+-i-n^+Si nanowire(SiNW)channel and two separate *** SiNW FBFEt can be reconfigured in the p-or n-channel operation modes via simple control of electric *** two separate gates induce potential barriers in the SiNW channel for selective control of the carrier *** contrast to previously reported rec on figurable tran sistors,our tran sistor features symmetry of the electrical characteristics for the p-and n-cha nnel operation ***-feedback operation of the SiNW FBFEt provides superior switching characteristics for the p-and n-type 8nfigurations,including the on/off ratios(~10^5)and subthreshold swings(1.36-1.78 mV/dec).this novel tran sistor is a promising can didate for reconfigurable electro nics.

关键词： silicon nanowire reconfigurable transistor positive-feedback loop separate gate

Solution procedure of residue harmonic balance method and its applications

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Science China(Physics,Mechanics & Astronomy) 2014年第8期57卷 1581-1591页

作者： GUO ZhongJin LEUNG A y t MA Xiaoyan School of Mathematics and Statistics Taishan University Department of Civil and Architectural Engineering City University of Hong Kong

this paper presents a simple and rigorous solution procedure of residue harmonic balance for predicting the accurate approximation of certain autonomous ordinary differential *** this solution procedure,no small parameter is *** harmonic residue of balance equation is separated in two parts at each *** first part has the same number of Fourier terms as the present order of approximation and the remaining part is used in the subsequent *** corrections are governed by linear ordinary differential equation so that they can be solved easily by means of harmonic balance method *** kinds of different differential equations involving general,fractional and delay ordinary differential systems are given as numerical examples *** accurate limited cycle frequency and amplitude are *** results match well with the exact solutions or numerical solutions for a wide range of control *** with those available shows that the residue harmonic balance solution procedure is very effective for these autonomous differential ***,the present method works not only in predicting the amplitude but also the frequency of bifurcated period solution for delay ordinary differential equation.

关键词： residue harmonic balance accurate approximation fractional ordinary differential system delay ordinary differential system