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Journal of Traffic and Transportation Engineering 2018年第5期6卷 230-240页

作者： baek-jae kim Se-Yeon Jung Kwang-Eui Yoo Qatar Airways 2060Unseo-Dong Jung-GuIncheonSouth Korea The Korea Transport Institute 370 Sicheong-daeroSejong-si339-007South Korea Korea Aerospace University 76 Hanggongdaehang-roGoyang-siSouth Korea

Recently,the LCCs(low cost carriers)using ICN(Incheon International Airport)as a hub have increased their international *** addition,foreign nationality airlines,including Middle Eastern carriers,have gradually increased their operations at *** growth in carrier services has resulted in a more competitive market environment,and reasonable resource assignment has become an important issue for airport ***,the airport will open a new terminal—T2(terminal 2)in early 2018,and carriers will need to adjust their operations reflecting the utilization of newly assigned *** by this change,we investigate the differentiation of airport service perception as well as airline choice behavior by passenger groups at *** paper employs a MNL(multinomial logit)model as well as a SEM(structural equation model).The results indicate that airline gate allocation is a significantly important value for passengers in terms of airport service perception and choice *** perception and choice behavior differ according to the selected *** study concludes that it is significantly important to consider the characteristics of passenger perception and choice behavior to improve airport operational efficiency,particularly with respect to carrier facility assignment.

关键词： Terminal facility assignment passenger perception choice behavior

Passenger Choice Behavior between Direct and Transit Flights——A Case Study on Passengers Using Hub Airports in the Northeast Asian Region

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Journal of Traffic and Transportation Engineering 2017年第5期5卷 260-270页

作者： Se-Yeon Jung baek-jae kim Kwang-Eui Yoo The Korea Transport Institute 370 Sicheong-daero Sejong-si South Korea Qatar Airways 2060 Unseo-Dong Jung-Gu Incheon South Korea Korea Aerospace University 76 Hanggongdaehang-ro Goyang-si South Korea

This study analyzes air passenger route choice behavior for long-haul inter-continental travel. It employs the SP （state preference） technique and logit modeling to investigate the impact of route development via neighboring countries in the region. With the Japanese government pursuing an increase in international routes at Haneda International Airport, and the Chinese government planning to construct Beijing Capital Second International Airport by 2019, the competition among airports to serve as hubs in Northeast Asia will increase significantly. Korean passengers will have a greater number of route choices when traveling to North America or Europe, utilizing not only direct flights from Incheon International Airport but also flights via Tokyo or Beijing area airports including Haneda International Airport, Narita International Airport, Beijing Capital International Airport and Beijing Capital Second International Airport. Accordingly, passengers will choose among the alternatives by considering fares and flight times. As such, it is essential for airports to offer flights with competitive prices for transit passengers to become successful competitive airports in the region. Therefore, it will become more important for market decision makers to strive toward more attractive ticket prices and better route network quality.

关键词： Passenger route choice behavior SP technique multinomial logit model nested logit model competitive airports inNortheast Asia.

An Evaluation of Network Competitiveness and the Effects of LCCs on South Korea’s Network Connectivity:Using Aviation Market Data

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Journal of Traffic and Transportation Engineering 2018年第3期6卷 109-120页

作者： Se-Yeon Jung baek-jae kim Kwang-Eui Yoo The Korea Transport Institute 370 Sicheong-daeroSejong-si 339-007South Korea Qatar Airways 2060Unseo-dong Jung-guIncheonSouth Korea Korea Aerospace University 76 Hanggongdaehang-roGoyang-siSouth Korea

LCCs(low cost carriers)are expanding their routes,which is affecting airport network *** subsequent increases in market competition and the number of airlines operating in air network routes have made the centrality analysis more significant because it can be used to identify airport network connectivity *** study analyzes the network connectivity competitiveness of South Korea among Asian airports using the MIDT(marketing information data transfer)dataset provided by OAG Traffic Analyser,which provides data collected from regional Asian airports since *** network centrality of individual airports is estimated to compare network connectivity competitiveness in *** for overall network centrality include degree,closeness and betweenness *** network centrality analysis may be helpful for South Korean airports in identifying their network performance and competitive position in Asia and confirming the effects that LCCs have on airport network *** results indicate that South Korea’s aviation market needs to expand its network via a strategy that prioritizes the strengthening of airport connectivity and the pursuit of *** addition,LCC operations will support Korea’s network growth via the various strategies that they ***,this in turn will bolster the overall market competitiveness of South Korean airports.

关键词： Air network connectivity competitiveness network connectivity centrality analysis low-cost carrier effects

Regulation of sleep by astrocytes in the hypothalamic ventrolateral preoptic nucleus

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Neural Regeneration Research 2025年第4期20卷 1098-1100页

作者： jae-Hong kim Ruqayya Afridi Il-Sung Jang Maan Gee Lee Kyoungho Suk Brain Korea 21 four KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Pharmacology School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Pharmacology School of DentistryKyungpook National UniversityDaeguRepublic of Korea Brain Science&Engineering Institute Kyungpook National UniversityDaeguRepublic of Korea

Astrocytes are functionally dynamic cells that support neurons in multiple ways throughout an organism’s *** astrocytic regulation of neuronal activity has been increasingly recognized in recent *** are now recognized as playing a more complex role than mere bystanders in the central nervous ***,their role in regulating the sleep neurocircuitry is not well *** this perspective,we highlight the role of astrocytes in sleep modulation,with a particular focus on regulatory mechanisms related to the ventrolateral preoptic nucleus(VLPO)of the *** briefly discuss recent literature reporting the role of VLPO astrocytes in regulating sleep-associated behaviors.

关键词： sleep ventrolateral astrocytes

Comparative study of chitosan/fibroin–hydroxyapatite and collagen membranes for guided bone regeneration in rat calvarial defects: micro-computed tomography analysis

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International Journal of Oral Science 2014年第2期6卷 87-93页

作者： jae Min Song Sang Hun Shin Yong Deok kim jae Yeol Lee Young jae baek Sang Yong Yoon Hong Sung kim Department of Oral and Maxillofacial Surgery School of Dentistry Pusan National University Yangsan Korea Department of Biomaterial Science Pusan National University Miryang Korea

This study aimed to utilize micro-computed tomography （micro-CT） analysis to compare new bone formation in rat calvarial defects using chitosan/fibroin-hydroxyapatite （CFB-HAP） or collagen （Bio-Gide） membranes. Fifty-four （54） rats were studied. A circular bony defect （8 mm diameter） was formed in the centre of the calvaria using a trephine bur. The CFB-HAP membrane was prepared by thermally induced phase separation. In the experimental group （n= 18）, the CFB-HAP membrane was used to cover the bony defect, and in the control group （n= 18）, a resorbable collagen membrane （Bio-Gide） was used. In the negative control group （n= 18）, no membrane was used. In each group, six animals were euthanized at 2, 4 and 8 weeks after surgery. The specimens were then analysed using micro-CT. There were significant differences in bone volume （BV） and bone mineral density （BMD）（P〈O.05） between the negative control group and the membrane groups. However, there were no significant differences between the CFB-HAP group and the collagen group. We concluded that the CFB-HAP membrane has significant potential as a guided bone regeneration （GBR） membrane.

关键词： chitosan/fibroin-hydroxyapatite collagen membrane guided bone regeneration micro-computed tomography rat calva rial defect

Simultaneous emission of orthogonal handedness in circular polarization from a single luminophore

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Light(Science & Applications) 2019年第1期8卷 39-46页

作者： Kyungmin baek Dong-Myung Lee Yu-Jin Lee Hyunchul Choi Jeongdae Seo Inbyeong Kang Chang-jae Yu jae-Hoon kim Department of Electronic Engineering Hanyang University222 WangsimniroSeongdong-guSeoul 04763Republic of Korea LG Display Co. Ltd.LG Science Park30 Magokjungang 10-roGangseo-guSeoul 07796Republic of Korea

The direct emission of circularly polarized(CP)light improves the efficiency of an organic light-emitting diode and characterizes the secondary structure of *** most cases,CP light is generated from a luminescent layer containing chiral characteristics,thereby generating only one kind of CP light in an entire ***,we propose direct CP light emissions using a twisted achiral conjugate polymer without any chiral dopant as an emitting layer(EML).The twisted structure is induced in the mesogenic conjugate polymer due to its elasticity by applying different alignment directions to its upper and lower ***,we demonstrate the simultaneous emission of orthogonal CP light in a single luminescent device by patterning different alignment directions on the surfaces of the *** light source with multipolarization including the orthogonal CP states is applicable to many applications in biosensors and optical devices.

关键词： circular twisted chiral

Arthroscopic treatment of iliopsoas tendinitis after total hip arthroplasty with acetabular cup malposition: Two case reports

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World Journal of Clinical Cases 2020年第21期8卷 5326-5333页

作者： Heejae Won Kwang-Hwan kim jae-Wook Jung Shin-Yoon kim Seung-Hoon baek Department of Orthopedic Surgery School of MedicineKyungpook National UniversityKyungpook National University Hospital130 Dongdeok-roJung-GuDaegu 41944South Korea

BACKGROUND Optimal treatment for iliopsoas tendinitis after total hip arthroplasty(THA)with cup malposition,iliopsoas release alone or with cup revision,is controversial,particularly in young,active ***,arthroscopic iliopsoas tendon(IPT)release in these patients has been rarely described,and midterm effects of this procedure on THA longevity and groin pain recurrence remain *** performed arthroscopic IPT release after THA and report midterm outcomes in two young patients with acetabular cup *** SUMMARY In the two patients,groin pain started early after *** examination revealed nonspecific findings,and laboratory tests showed no evidence of *** and computed tomography showed reduced acetabular component anteversion angle and anterior cup prominence of more than 16 *** therapeutic diagnosis,ultrasonography-guided lidocaine with steroid was injected into the IPT *** both patients,groin pain improved initially but worsened after a few ***,the patients underwent arthroscopic IPT release under spinal *** revealed synovitis with fibrous tissues around the IPT and various lesions related to the implants after *** tenotomy and debridement with biopsy were performed;histopathologic studies showed chronic inflammation with synovial *** patients were encouraged to start walking immediately after surgery,and they returned to complete daily function early after *** experienced no recurrence of groin pain or any implant-related problems 5 years *** Arthroscopic IPT release for cup malposition produced excellent midterm outcomes without recurrence of groin pain and implant-related problems.

关键词： Iliopsoas tendinitis Total hip arthroplasty Cup malposition Arthroscopy Tenotomy Case report

Two-Terminal Lithium-Mediated Artificial Synapses with Enhanced Weight Modulation for Feasible Hardware Neural Networks

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Nano-Micro Letters 2023年第5期15卷 236-253页

作者： Ji Hyun baek Kyung Ju Kwak Seung Ju kim jaehyun kim jae Young kim In Hyuk Im Sunyoung Lee Kisuk Kang Ho Won Jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoul 08826Republic of Korea Advanced Institute of Convergence Technology Seoul National UniversitySuwon 16229Korea

Recently,artificial synapses involving an electrochemical reaction of Li-ion have been attributed to have remarkable synaptic ***-terminal synaptic transistors utilizing Li-ion intercalation exhibits reliable synaptic characteristics by exploiting the advantage of nondistributed weight updates owing to stable ion ***,the three-terminal configurations with large and complex structures impede the crossbar array implementation required for hardware neuromorphic ***,achieving adequate synaptic performances through effective Li-ion intercalation in vertical two-terminal synaptic devices for array integration remains ***,two-terminal Au/LixCoO_(2)/Pt artificial synapses are proposed with the potential for practical implementation of hardware neural *** Au/LixCoO_(2)/Pt devices demonstrated extraordinary neuromorphic behaviors based on a progressive dearth of Li in LixCoO_(2)*** intercalation and deintercalation of Li-ion inside the films are precisely controlled over the weight control spike,resulting in improved weight control *** types of synaptic plasticity were imitated and assessed in terms of key factors such as nonlinearity,symmetricity,and dynamic ***,the LixCoO_(2)-based neuromorphic system outperformed three-terminal synaptic transistors in simulations of convolutional neural networks and multilayer perceptrons due to the high linearity and low programming *** impressive performances suggest the vertical two-terminal Au/LixCoO_(2)/Pt artificial synapses as promising candidates for hardware neural networks.

关键词： Artificial synapse Neuromorphic Li-based Two-terminal Synaptic plasticity

Cluster Analysis of Tropical Cyclones Making Landfall on the Korean Peninsula

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Advances in Atmospheric Sciences 2009年第2期26卷 202-210页

作者： Ki-Seon CHOI baek-Jo kim Chee-Young CHOI jae-Cheol NAM National Institute of Meteorological Research Seoul Republic of Korea Korea Meteorological Administration Seoul Republic of Korea

Cluster analysis has been performed on the tracks of 51 Tropical Cyclones （TCs） that made landfall on the Korean Peninsula （KP） for the period of 1951-2004. The classification technique of the landfalling tracks used in this study was the fuzzy clustering method （FCM） and the resultant silhouette coefficient suggested four clusters as an optimal cluster number. Most TCs of Cluster 2 and Cluster 3 （C-23） tended to pass through China's Mainland before landfall, but those of Cluster 1 and Cluster 4 （C-14） tended to mostly land after moving northward from the East China Sea （ECS） without passing over China's Mainland. The TC landfalling frequency of C-14 has begun to clearly increase since the late 1980s, particularly the maximum landfalling frequency in the early 2000s set a record for the 54-year analysis period. The ridge axis of the western North Pacific high （WNPH） of C-23 bends more equatorward than that of C-14, so that the monsoon trough of C-23 is located more equatorward than that of C-14. As a consequence, most TCs of C-23 tend to recurve inland of China, but over the ECS for C-14.

关键词： Korean Peninsula tropical cyclone landfall fuzzy cluster Arctic Oscillation Nino-3.4

Effect of Ni Contents on the Microstructure and Mechanical Properties of Martensitic Stainless Steel Guide Roll by Centrifugal Casting

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Journal of Materials Science & Technology 2008年第3期24卷 343-346页

作者： Villando Thursdiyanto Eun-jae Bae Eung-Ryul baek School of Materials Science and Engineering Yeungnam University

A novel process based on centrifugal casting was developed to produce martensitic stainless steel for guideroll materials. Centrifugal casting provides a lower production cost and less of the thermal cracking defects which normally occur in the overlaid welding process. In this study, the effects of Ni on the microstructure and mechanical properties of martensitic stainless steel were investigated. The results show that the addition of Ni resulted in a decrease in the volume fraction of delta ferrite and an increase in the volume fraction of the retained austenite, respectively. Moreover, a tensile strength of 1600 MPa with an elongation of 4% were obtained after tempering at 500℃ for 2 h. These values were higher than those obtained by using the conventional overlaid process.

关键词： Centrifugal casting Martensitic stainless steel Delta ferrite Mechanical properties