• Title/Summary/Keyword: 강릉

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Effects of a Simplified Mixture Nozzle Geometry on the Acoustic Field in an Aero Gas Turbine Combustor (항공용 가스터빈 연소기에서의 혼합기 노즐 형상의 단순화가 음향장 해석 결과에 미치는 영향)

  • Pyo, Yeongmin;Hong, Sumin;Kim, Daesik
    • Journal of ILASS-Korea
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    • v.24 no.2
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    • pp.58-65
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    • 2019
  • A 3D FEM (Finite Element Method) based Helmholtz solver has been commonly used to characterize fundamental acoustic behavior and investigate dynamic instability features in many combustion systems. In this approach, a geometrical simplification of the target system has been generally made in order to reduce computational time and cost because a real combustor and fuel nozzle have a very complicated flow passage. The feasibility of these simplifications is quantitatively investigated in a small aero gas turbine nozzle in term of acoustic characteristics. It is found that the simplification in a nozzle geometry during the 3D FEM analysis process has no great influence on the acoustic modeling results, while the calculation complexity can be improved for a similar modeling accuracy.

A Study of Improvement of the Accessibility of Marine Tourism by Expansion of Traffic Network: A focused on opening of Seoul-Gangneung KTX (국내 광역 교통망 확충에 따른 해양관광 접근성 개선에 관한 연구: 강릉선 KTX 개통 사례를 중심으로)

  • Choi, Il-Sun
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2019.05a
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    • pp.169-170
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    • 2019
  • Domestic marine tourism has been greatly influenced by traffic accessibility. The purpose of this study is to provide a way to improve the plan of marine tourism in order for expanding traffic network. In particular, with the successful hosting of the 2018 PyeongChang Winter Olympic Games and the opening of Seoul-Gangneung KTX.

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A Study on Beam Error Method of Coherent Interference Signal Estimation using Optimum Covariance Weight Vector (최적 공분산 가중 벡터를 이용한 상관성 간섭 신호 추정의 빔 지향 오차)

  • Cho, Sung Kuk;Lee, Jun Dong;Jeon, Byung Kook
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.10 no.4
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    • pp.53-61
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    • 2014
  • In this paper, we proposed covariance weight matrix using SPT matrix in order to accurate target estimation. We have estimated a target using modified covariance matrix and beam steering error method. We have minimized beam steering error in order to estimation desired a target. This method obtain optimum covariance weight using modified SPT matrix. This paper of proposal method is showed good performance than general method. We updated a weight of covariance matrix using modified SPT matrix. We obtain optimum covariance matrix weight to application beam steering error method in order to beam steering toward desired target. Through simulation, we showed that compare proposal method with general method. It have improved resolution of estimation target to good performance more proposed method than general method.

Temperature Distribution of High Speed Tool Steel Rod During High Speed Hot Rolling Procedure (고속열간압연에서 고속도공구강 봉재의 온도분포 해석)

  • Jeong, Hyo Tae;Lee, Soo Yeon;Ha, Tae Kwon;Jung, Jae Young
    • Korean Journal of Metals and Materials
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    • v.46 no.3
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    • pp.150-158
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    • 2008
  • The temperature distribution of high speed tool steel rod has been studied during high speed hot rolling procedures. The tool steel rod shows severe temperature gradient during rolling procedures and the temperature at the center of rod are much higher than that at the surface of rod. This temperature gradient accumulated after every rolling procedure and the center of rolled rod could be remelt in some procedures to cause inside defects. In this study, the temperature distribution was simulated using finite element method and the processing parameters such as rolling speed, cooling condition, have been discussed to prevent the temperature increases at the center of rod.

A Wireless Lap Time Measurement System of Ski Slopes Using a USN (USN을 이용한 스키 슬로프의 무선 구간기록 측정 시스템)

  • Lee, Hyung-Bong;Park, Lae-Jeong;Chung, Tae-Yoon
    • Proceedings of the Korea Information Processing Society Conference
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    • 2009.11a
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    • pp.515-516
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    • 2009
  • 강원도는 2018 년 동계올림픽 유치 및 USN 산업 활성화를 목표로 도내에서 u-스포츠 사업을 활발하게 진행 중에 있다. 이 사업의 일환으로 2008 년 CDMA 망을 기반으로 한 무선 구간기록 측정 시스템이 용평 스키장에 이미 설치된 바 있다. 이 연구에서는 기 설치된 CDMA 망 기반 무선 구간 기록 측정 시스템을 USN 기반으로 전환시켜 구현하고 평가한다. 평가 결과 구간 기록의 측정 오차가 2.6ms에서 700us로 현저하게 개선되었다.

Energy efficient selectivity sensing query in WSN (에너지 효율성을 위한 선택적 Sensing Query 메커니즘)

  • Park, Soo-Kwon;Park, No-Yeoul;Kim, Chang-Hwa
    • Proceedings of the Korea Information Processing Society Conference
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    • 2011.11a
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    • pp.137-140
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    • 2011
  • 센서 네트워크의 가장 큰 이슈는 센서노드들의 제한된 에너지를 효율적으로 관리하여, 센서노드의 Lifetime을 연장하는데 있다. 센서 네트워크에서 가장 큰 에너지 손실 부분은 RF통신 부분이라 할 수 있다. 본 논문은 질의응답에 참여할 센서 노드를 선별적으로 구성함으로써, 질의응답에 참여하지 않는 센서노드들의 에너지를 관리하고자 한다. 또한 참여노드의 선별적 구성에 대한 신뢰도를 향상시키기 위해 클러스터에 존재하는 센서 노드들 간의 신뢰비율을 선택 메커니즘에 포함시키고자 한다.

Deep Learning-based Gait Authentication System (딥러닝 기반 걸음걸이 인증 시스템)

  • Choi, Ji-Woo;Choi, Sangil;Kang, Taewon
    • Proceedings of the Korea Information Processing Society Conference
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    • 2022.11a
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    • pp.459-461
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    • 2022
  • 개인 정보 보호가 중요시되는 초연결사회에서는 정보와 사용자를 연결하는 매개체는 적법하지 않은 사용자를 판별할 수 있어야 한다. 본 연구는 그 매개체를 스마트폰으로 삼고 인간의 걸음걸이에 기반한 스마트폰 인증 시스템을 제안한다. 인간의 걸음걸이를 딥러닝 모델 중 하나인 CNN으로 학습시킨 후, 스마트폰에 탑재하여 사용자가 스마트폰을 휴대한 상태로 7초간 걸음으로써 적법한 사용자인지 아닌지의 여부를 판별한다. 본 연구에서 제안한 모델의 평가 지표로는 정확도, 정밀도, 재현율, F1-score를 사용했으며, 그 결과, 위 4개의 평가지표 모두 평균 95% 이상의 결과를 얻었다.

An Energy Efficient Clustering Mechanism in Underwater Acoustic Sensor Networks (수중 음향 센서 네트워크에서의 에너지 효율적인 클러스터링 메커니즘)

  • Yun, Phil-Jung;Kim, Chang-Hwa;Kim, Sang-Kyung
    • Proceedings of the Korea Information Processing Society Conference
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    • 2008.05a
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    • pp.881-884
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    • 2008
  • 수중 음향 센서 네트워크는 무선 센서 네트워크의 한 분야로서 활발하게 연구되고 있다. 하지만 무선 센서 네트워크에서의 지상이라는 환경은 수중 음향 센서 네트워크에서의 수중이라는 환경과 많은 차이가 있다. 예를 들어 수중에서는 지상에서 보다 더 많은 통신 에너지를 필요로 하며 현재 단일채널 밖에 사용할 수 없다. 그러므로 수중 음향 센서 네트워크에서 무선 센서 네트워크의 메커니즘을 그대로 사용하기에는 적합하지 않다. 본 논문에서는 수중 음향 센서 네트워크에서의 에너지 효율적 클러스터링 메커니즘을 제안한다. 제안하는 클러스터링 메커니즘은 단일채널의 수중환경을 대상으로 클러스터 내 통신에서 발생하는 충돌문제를 최소화하여 에너지 효율을 증가시키기 위해 하향식방법을 이용하여 클러스터 헤드 노드를 선정하고 선정된 클러스터 헤드 노드를 중심으로 클러스터 범위를 결정하는 방법을 제시한다.

Dental Hygienist-Led Dental Hygiene Process of Care for Self-Support Program Participants in Gangneung (강릉시 자활근로사업 참여자 대상 치위생 과정 사례보고)

  • Yoo, Sang-Hee;Kwak, Seon-Hui;Lee, Sue-Hyang;Song, Ga-In;Bae, Soo-Myoung;Shin, Sun-Jung;Shin, Bo-Mi
    • Journal of dental hygiene science
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    • v.18 no.6
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    • pp.327-339
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    • 2018
  • This study aimed to provide basic data for establishing the clinical basis for dental hygienist-led dental hygiene process of care by identifying multiple risk factors for self-support program participants in Gangneung city; we also compared oral health status and behavioral changes through customized oral health care. Four dental hygienists who were evaluated for degree of conformity provided dental hygiene process of care to eight self-support program participants who were selected as having an oral health risk among people in the self-support center. The clinical indicators measured during dental hygiene assessment and evaluation and behavioral changes due to dental hygiene intervention were compared and analyzed. With respect to clinical indicators, at the time of probe, the retention rate of patients with gingival bleeding decreased from 61.4% to 14.7% after intervention (p=0.004). Furthermore, the retention rate of patients with a periodontal pocket >4 mm decreased from 15.6% to 5.8% (p=0.001). The average modified O'Leary index of the patients improved from 23 to 40 (p=0.002). Previously, all eight subjects used the vertical or horizontal method of brushing; after dental hygiene care interventions regarding method and frequency of toothbrushing, use of oral care products, and individual interventions, they started using the rolling or Bass method of toothbrushing. Four of eight subjects reported using interdental toothbrushes after intervention. As a result of applying the change model to the transtheoretical behavior change of the subject, the result of strengthening the health behavior was confirmed. For promotion of oral health by the prevention-centered incremental oral health care system, dental hygienist-led dental hygiene management and maintenance is essential. It is thought that continuous research, such as for feasibility evaluation, cost benefit analysis, and preparation of legal systems, is needed to establish and activate dental hygiene management.

Gangneung Haksan Odokttegi Heritage and Performance Contents (강릉학산오독떼기유산과 공연콘텐츠)

  • Lee, Chang-Sik
    • (The) Research of the performance art and culture
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    • no.38
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    • pp.249-275
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    • 2019
  • Gangneung farm song is important for the ritualistic labortheatricals. Especially, in the theatrical process program, the songsof weeding, such as Haksan Odokkteggi and Ssadae, were alsoincluded to represent the agricultural ritualistic prayer for goodharvest. The use of Gangneung farm song is attractive in termsofthe circumstances. There is no chance of success as a plan simplyfor local events. As a comprehensive art, Gangneung farmsongshould simultaneously revitalize locality, representability andglobality. In this context, three directions are suggested dependingon the development progress. The second direction to the thirddirection are mainly oriented toward government-local authoritycentered support, but, in particular, the third direction should aimtobe an open archive in which the public and the contents prosumercan participate. In the production of the traditional content, OSMUmust be endlessly recreated and spread through 'diversity' and'interrelationships'. The contents utilization was discussed based on the transmissiondetails and analysis evidence of Gangneung Haksan Odokttegi. Thediversification of the way of performing farm song and the folk songs that can induce interest were proposed. Furthermore, basedon the fact that 12 songs classified into 8 work types, there-creation of the contents that focus on the playful aspect of theperforming arts was also proposed. In addition to suggestingthedesirable discourse of the performance groups, the experienceprogram development, education, public relations andcommunication reinforcement based on the narrating principlesoffarm songs, and the development and execution of farmsongprograms based on the tradition and the event demands wereproposed. While mentioning the necessity of value creation, thevitality of performing arts skills that put emotion, imagination, fun, sympathy, and etc. on the original form and the model of farmsongs should be supplemented to Gangneung Haksan Odokttegi. The independent transmission aspect of Gangneung Arirangisalso positive. There are difficulties of reduction of traditionalitydueto the designation, standardized transmission, lack of developmentof voluntary performances, and demonstration-centeredtransmission. Narrowly, we focused on the education andvitalization directions in terms of the capacity building of theconservation council itself. By embodying the essential value of theagricultural literature that farm songs possess, it can bringimpression of all worlds, all lives, communication and sharing, anddraw inspiration from the humanistic view of the world andemotion. The reconstitution of agricultural heritage, theconstruction of a storytelling linked with the concrete objects suchas Beomil National Preceptor, Gulsansa, FlagpoleSupport(Dangganjiju), Seokcheon, Hakbawi rock, and etc., andtheestablishment of fusion type farm song museum were proposed. In terms of culture industry, we requested active support fromtheinstitutions including local governments and various farmsongstorytelling creation projects.