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International Journal of Disaster Risk Science 2021年第2期12卷 267-280页

作者： Tin Myo Aung Seunghoo lim Defence Services Academy Pyin Oo Lwin05081Myanmar Public Management and Policy Analysis Program Graduate School of International RelationsInternational University of JapanMinami Uonuma-shiNiigata949-7277Japan

In disaster response,collaboration facilitates interactions among actors,such as the government,the military,nongovernmental organizations,and civil society *** study examined the longitudinal changes in collaborative governance in Myanmar’s disaster responses based on cases of flooding in 2015,2016,and *** examine the mechanisms underlying this dynamic network formation,the collaborative ties of the actors involved in search and rescue activities were converted into longitudinal relational data sets,and the evolution of collaborative governance was analyzed by relying on the assumptions of social capital,transaction cost,homophily,and resource dependency theories and using a longitudinal social network analysis *** findings show that the collaborative networks of search and rescue processes in disaster response evolved and changed over time according to the hypothesized patterns of strong,weak,and preferential tie *** study also revealed that the collaborative governance system assumes the form of a hierarchy rather than a generalized exchange,and the actors’reliance on military organizations is not obvious due to the emerging alternative non-military actors and diverse local actors observed in the cases.

关键词： Collaborative governance Longitudinal social network analysis Myanmar flood disasters Network sustainability

On the Algebraic Functional Equation of the Eigenspaces of Mixed Signed Selmer Groups of Elliptic Curves with Good Reduction at Primes above p

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Acta Mathematica Sinica,English Series 2021年第2期37卷 289-305页

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

Let p be an odd prime number,and let E be an elliptic curve defined over a number field which has good reduction at every prime above *** suitable assumptions,we prove that the η-eigenspace and the ■-eigenspace of mixed signed Selmer group of the elliptic curve are *** a corollary,we show that the η-eigenspace is trivial if and only if the ■-eigenspace is *** results can be thought as a reflection principle which relates an Iwasawa module in a given eigenspace with another Iwasawa module in a "reflected" eigenspace.

关键词： Algebraic functional equation mixed signed Selmer groups

Unveiling the role of Ni in Ru-Ni oxide for oxygen evolution: Lattice oxygen participation enhanced by structural distortion

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Journal of Energy Chemistry 2023年第2期77卷 54-61,I0003页

作者： Young-Jin Ko Man Ho han Chulwan lim Seung-Ho Yu Chang Hyuck Choi Byoung Koun Min Jae-Young Choi Woong Hee Lee Hyung-Suk Oh Clean Energy Research Center Korea Institute of Science and Technology(KIST)Hwarang-ro 14-gil 5Seongbuk-guSeoul 02792Republic of Korea Department of Chemical and Biological Engineering Korea University145Anam-roSeongbuk-guSeoul 02841Republic of Korea Department of Chemistry Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea National Agenda Research Division Korea Institute of Science and Technology(KIST)Hwarang-ro 14-gil 5Seonbuk-guSeoul 02792Republic of Korea Graduate School of Energy and Environment(KU-KIST Green School) Korea University145 Anam-roSeongbuk-guSeoul 02841Republic of Korea School of Advanced Materials Science&Engineering Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea KIST-SKKU Carbon-Neutral Research Center Sungkyunkwan University(SKKU)Suwon 16419Republic of Korea

Introducing Ni in Ru oxide is a promising approach to enhance the catalytic activity for the oxygen evolution reaction(OER).However,the role of Ni(which has a poor intrinsic activity)is not fully ***,a Ru NiO_(x)electrode fabricated via a modified dip coating method exhibited excellent OER performance in acidic media,and neutral media for CO_(2)reduction *** combined in-situ/operando X-ray absorption near-edge structure and on-line inductively coupled plasma mass spectrometry studies to unveil the role of the Ni introduced in the Ru *** propose that the Ni not only transforms the electronic structure of the Ru oxide,but also produces a large number of oxygen vacancies by distorting the oxygen lattice structure at low overpotentials,increasing the participation of lattice oxygen for *** work demonstrates the real behavior of bimetallic oxide materials under applied potentials and provides new insights into the development of efficient electrocatalysts.

关键词： Oxygen evolution reaction Ru electrode Ni electrode Oxygen vacancies In-situ/Operando studies

Development of Risk Index of Uninterrupted Traffic Flow According to the Occurrence of Fog

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World Journal of Engineering and Technology 2018年第3期6卷 519-531页

作者： Soullam Kim Sung han lim Korea Institute of Civil Engineering and Building Technology South Korea

The driver’s visibility is degraded when weather conditions deteriorate, which affects the traffic flow and induces traffic congestion or accidents. In particular, traffic accidents can be?led to chain reaction collisions, with high rate of fatality, when fog occurs in contrast to other weather factors that may restrict visibility. For the development of a traffic risk index, a deviation of the vehicle’s speed was set for the traffic risk index by referring to previous study results. In addition, factors that affected the deviation in a vehicle’s speed were selected as independent variables based on the traffic flow analysis during occurrences of fog. The visible distance, traffic volume, and speed were selected as the independent variables to estimate the optimal parameters in the regression model. The traffic risk index model during occurrences of fog proposed in this study is an exponential model, with the visible distance and the traffic volume defined as independent variables. According to the study model, traffic risk increased as the visible distance decreased and the traffic volume was lower. Thus, the visible distance that can affect traffic flow during occurrences of fog can be determined in the future based on the results of this study. The study results will be expected to contribute to not only traffic safety improvements, but also the facilitation of traffic flow as drivers and traffic operation managers intuitively recognize the level of risk.

关键词： Fog Visibility Traffic Flow Speed-Flow Relationship Risk Index

Beyond just a tight fortress:contribution of stroma to epithelial-mesenchymal transition in pancreatic cancer

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Signal Transduction and Targeted Therapy 2020年第1期5卷 328-339页

作者： Ashenafi Bulle Kian-Huat lim Division of Oncology Department of Internal MedicineBarnes-Jewish Hospital and The Alvin J.Siteman Comprehensive Cancer CenterWashington University School of MedicineSt.LouisMO 63110USA

Novel effective treatment is direly needed for patients with pancreatic ductal adenocarcinoma(PDAC).Therapeutics that target the driver mutations,especially the KRAS oncoprotein and its effector cascades,have been *** is increasing clear that the extensive fibro-inflammatory stroma(or desmoplasia)of PDAC plays an active role in the progression and therapeutic resistance of *** desmoplastic stroma is composed of dense extracellular matrix(ECM)deposited mainly by the cancer-associatedfibroblasts(CAFs)and infiltrated with various types of immune *** dense ECM functions as a physical barrier that limits tumor vasculatures and distribution of therapeutics to PDAC *** addition,mounting evidence have demonstrated that both CAFs and ECM promote PDAC cells aggressiveness through multiple mechanisms,particularly engagement of the epithelial-mesenchymal transition(EMT)*** of a mesenchymal-like phenotype renders PDAC cells more invasive and resistant to therapyinduced ***,we critically review seminal and recent articles on the signaling mechanisms by which each stromal element promotes EMT in *** discussed the experimental models that are currently employed and best suited to study EMT in PDAC,which are instrumental in increasing the chance of successful clinical translation.

关键词： stroma transition render

A Note on the Signature Representations of the Symmetric Groups

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Algebra Colloquium 2021年第3期28卷 469-478页

作者： Kay Jin lim Jialin Wang Division of Mathematical Sciences Nanyang Technological University SPMS-04-0121 Nanyang LinkSingapore 637371Singapore

For a partition λ and a prime p,we prove a necessary and sufficient condition for there to exist a composition δ such that δ can be obtained from λ after rearrangement and no partial sums of δ are divisible by **... 详细信息

关键词： symmetric group Schur algebra modular Kostka number

A short overview of the lead iodide residue impact and regulation strategies in perovskite solar cells

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Journal of Energy Chemistry 2024年第3期90卷 504-510,I0012页

作者： Eng Liang lim Zhanhua Wei Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and EngineeringHuaqiao UniversityXiamen 361021FujianChina

Lead iodide(PbI2) is a vital raw material for preparing perovskite solar cells(PSCs),and it not only takes part in forming the light absorption layer but also remains in the grain boundary as a *** other words,the PbI2 content in the precursor and as formed film will affect the efficiency and stability of the *** moderate residual PbI2,it passivates the bulk/surface defects of perovskite,reduces the interfacial recombination,promotes the perovskite stability,minimizes the device hysteresis,and so *** PbI2 residue will reduce the interfacial passivation effect and device *** addition to facilitating the non-radiative recombination,over PbI2 residue can also lead to electronic insulation in the grain boundary and deteriorate the device ***,the impact and regulation of PbI2 residue on the device performance and stability is still not fully ***,a comprehensive and detailed review is presented by discussing the PbI2 residue impact and its regulation strategies(i.e., elimination,facilitation and conversion of the residue PbI2) to manipulate the PbI2 content,distribution and ***,we also show future outlooks in this field,with an aim to help further the progression of high-efficiency and stable PSCs.

关键词： Lead iodide Residue Regulation Perovskite solar cells Efficiency Stability

Zone 3 Relay Blocking Scheme to Prevent Cascaded Events

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Transactions of Tianjin University 2008年第2期14卷 97-105页

作者： lim Seong-Il Department of Electrical Engineering Kyungnam UniversityMasanKorea

Defense systems are needed to prevent catastrophic failures of a power grid due to cascaded events. Cascaded events can be attributed to improper operations of protective relays. The most challenging problem for the design and implementation of a defense system is the performance in accuracy and speed in a real time environment. Protective devices are normally designed to operate fast in order to isolate the fault（s）. This paper proposes a new methodology to distinguish line overloads from actual faults for distance relays. In order to distinguish between line flow transfers from a line outage and an actual fault, the line outage distribution factor （LQDF） and generation shift factor （GSF） based power flow estimation method, and a secure peer to peer （P2P） communication structure are adopted. Computer simulations of cascaded events for a 6-bus system and the Korean power grid have been performed to establish the feasibility of the proposed scheme.

关键词： blackouts cascaded events defense system distance relay Zone 3 relay

Reconfigurable transmissive metasurface with a combination of scissor and rotation actuators for independently controlling beam scanning and polarization conversion

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Microsystems & Nanoengineering 2024年第2期10卷 173-180页

作者： Chhunheng Lor Ratanak Phon Sungjoon lim Intelligent Semiconductor Engineering Chung-Ang UniversityHeukseok-DongDongjak-GuSeoul06974Republic of Korea School of Electrical and Electronic Engineering Chung-Ang UniversityHeukseok-DongDongjak-GuSeoul06974Republic of Korea

Polarization conversion and beam scanning metasurfaces are commonly used to reduce polarization mismatch and direct electromagnetic waves in a specific direction to improve the strength of a wireless ***,identifying suitable active and mechanically reconfigurable metasurfaces for polarization conversion and beam scanning is a considerable challenge,and the reported metasurfaces have narrow scanning ranges,are expensive,and cannot be independently *** this paper,we propose a reconfigurable transmissive metasurface combined with a scissor and rotation actuator for independently controlling beam scanning and polarization conversion *** metasurface is constructed with rotatable unit cells(UCs)that can switch the polarization state between right-handed(RHCP)and left-handed circular polarization(LHCP)by flipping the UCs to reverse their phase ***,independent beam scanning is achieved using the scissor actuator to linearly change the distance between the *** and experimental results confirm that the proposed metasurface can perform beam scanning in the range of 28°for both the positive and negative regions of a radiation pattern(RHCP and LHCP beams)at an operational frequency of 10.5 GHz.

关键词： beam rotation controlling

Chronic hepatitis C genotype 1 treatment roadmap for resource constrained settings

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World Journal of Gastroenterology 2015年第6期21卷 1972-1981页

作者： Seng Gee lim Department of Gastroenterology and Hepa-tology Department of Medicine National University Health System Yong Loo Lin School of Medicine National University of Singapore

AIM:To use existing hepatitis C virus(HCV)antiviral therapies as access to new treatments is ***:A Pub Med search for randomised control trials or meta-analysis related to response-guided therapy of HCV genotype 1 patients was undertaken using pegylated interferon and ribavirin(PR),boceprevir(B)and telaprevir(T)and lead-in where responseguided therapy at TW4(TW4),8(TW8),10(TW10),or12(TW12)based on HCVRNA(+)or HCVRNA(-).Studies presented at major conferences were also *** necessary,a post-hoc analysis was performed.A response-guided management roadmap was created based on sustained virological response(SVR).RESULTS:Starting with PR,those with HCVRNA(-)at TW4 have>86%SVR,while those are HCVRNA(+)have 34%-41.7%***(-)TW4 patients can have 24 wk PR if HCVRNA80%SVR,leading to the"80-80"***:Using a roadmap based on HCVRNA(-)at TW4 or TW8(the"80-80"rule),high SVR can be achieved,and guide the best choices for treatment,and also reduces drug exposure in poor responders.

关键词： Chronic hepatitis C hepatitis C virus RNA Sustaine