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Load Measurements of 100 kW Wind Turbine (100 kW급 풍력발전기의 하중 측정)

  • Bae, Jae-Sung;Kim, Sung-One;Kyong, Nam-Ho
    • Journal of the Korean Solar Energy Society
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    • v.24 no.4
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    • pp.27-33
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    • 2004
  • Mechanical load measurements on blade and tower of Vestas 100 kW wind turbine has been reformed in Wollyong test site, Jeju island. The experimental procedure for the measurement of wind turbine loads, such as edgewise(lead-lag) bending moment, flapwise bending moment, and tower base bending moment, has been established. The test facilities consisting of strain-gauges, telemetry and T-Mon system are installed in the wind turbine. Strain gauges are on-site calibrated against load cell prior to monitoring the wind turbine loads. Using the test setup, the loads on the components are being measured and analysed for various external conditions of the wind turbine. A set of results for near rated wind speed has been presented in this paper.

A COMPARATIVE STUDY OF THE TONGUE MANDIBLE AND HYOID BONE POSITION BETWEEN THE ADENOID HYPERTROPHIED CHILDREN AND THE NORMAL CHILDREN (Lymphadenoid가 Hypertrophy된 아동과 정상아동간의 Tongue, Mandible 및 Hyoid bone의 위치비교에 관한 연구)

  • Lee, Gong-Geun;Ryu, Young-Kyu
    • The korean journal of orthodontics
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    • v.16 no.2
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    • pp.99-106
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    • 1986
  • The author studied 21 adenoid hypertrophied children and 50 normal children by the horizontal, vertical and angular measurements to analyze, the effects of the lymphadenoid hypertrophy to the tongue, mandible, and hyoid bone position. The results were as follows; 1. The tongue of the Adenoid hypertrophy children was positioned mon anterior and lower than that of the normal children. 2. The horizontal, vertical, and angular measurements of the mandible position were larger in the experimental group and especially ANS to ME, PNS to MP, PTM to MP, PP to MP, FOP to MP showed statistically significant difference. 3. The measurements of the hyoid bone position were also larger in the experimental group.

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Invasive cervical resorption: treatment challenges

  • Kim, Yookyung;Lee, Chan-Young;Kim, Euiseong;Roh, Byoung-Duck
    • Restorative Dentistry and Endodontics
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    • v.37 no.4
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    • pp.228-231
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    • 2012
  • Invasive cervical resorption is a relatively uncommon form of external root resorption. It is characterized by invasion of cervical region of the root by fibrovascular tissue derived from the periodontal ligament. This case presents an invasive cervical resorption occurring in maxillary lateral incisor, following damage in cervical cementum from avulsion and intracoronal bleaching procedure. Flap reflection, debridement and restoration with glass ionomer cement were performed in an attempt to repair the defect. But after 2 mon, more resorption extended apically. Considering root stability and recurrence potential, we decided to extract the tooth. Invasive cervical resorption in advanced stages may present great challenges for clinicians. Therefore, prevention and early detection must be stressed when dealing with patients presenting history of potential predisposing factors.

A case of Nutcracker Syndrome Associated with Proteinuria (단백뇨를 동반한 Nutcracker 증후군 1례)

  • Son Jin-Tae;Rho Kwang-Sik;Kim Pyung-Kil;Kim Mung-Jun
    • Childhood Kidney Diseases
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    • v.1 no.2
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    • pp.166-169
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    • 1997
  • The nutcracker syndorme refers to compression of the left renal vein between the aorta and the superior mesentric artery which results in renal vein, left gonadal vein varices, hematuria and left sided flank pain. We report this experience of 11yr-11mon of girl has typical Nutcracker syndrome with persistent proteinuria and without typical hematuria. According to the renal biopsy for persistent proteinuria, biopsy shows pathologic findings similar to minimal change nephrotic syndrome. All symtpoms relieved without any specific treatments but she had no response to steroid treatment for persistent proteinuria. Now she was followed up through OPD base without symptom and consideration of surgical intervention.

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A study on the future pattern fire engine development (미래형 소방차 개발에 관한 연구)

  • Kim, Yoo-Shik;Jeong, Kyung-Mon;Oh, Jae-Hoon;Kim, Chang;Kim, Hyeon-Tae
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2011.11a
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    • pp.67-70
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    • 2011
  • 현재 사용되는 대부분의 소방차량은 일반 원심펌프로 보편화된 방수 소화작전이 가능하나 오늘날 첨단화 되어 가는 구조물과 다양한 시설구조의 인프라에 따른 적응에는 한계가 있으며 이러한 현재의 다양한 화재 형태와 양상에 능동적으로 대처하며 효율적인 소방활동을 위하여 전천후 출동과 소규모 인력으로 효과적인 소화활동을 할 수 있도록 차량의 구조 개선과 새로운 유 무선포방수총시스템의 도입과 흠로 및 빙판길 혹은 협소한 출동로도 원활하게 효과적으로 대처할 수 있도록 괘도바퀴와 높은 흡상 및 미분무수 소화시스템을 장착한 미래형 소방차량을 연구 개발하고자 한다.

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A Study on the Characteristics of Fires Depending on the Existence of Boring on the Ceiling (천정 천공 유무에 따른 화재 특성 연구)

  • Rie, Dong-Ho;Choi, Back-Yeol;SeoMon, Su-Cheol;Yoo, Myung-Yeol
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2010.04a
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    • pp.16-20
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    • 2010
  • 본 연구는 지하 냉동 창고 화재발생시 천공이 화재진압의 방법으로써 화재성상에 미치는 영향 등 천공의 효과를 검증하고 화재진압 기술에 대한 기초연구로서 천공의 위치, 천공 개방 시간, 천공 개방에 따른 근접 건축물로의 화재 전파양상을 FDS를 통하여 시뮬레이션 하여 분석하였다. 천공의 개방은 내부 화재의 요인을 빨리 소모시켜 온도 및 발열량을 빠르게 낮춘다. 이와 같이 천공의 유무에 따라 화재에 양상이 바뀌기 때문에 화재 진행 사항 및 화재 장소 가연물에 형태 등 각 화재 형태에 따라 적절한 천공의 위치 및 개방시간등이 마련되어야 할 것이다.

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Evaluation of ERS(Embedded Rail Track System): Design and Experiments (매립형철도궤도 시스템 성능평가)

  • Park, Jeung-Geun;Kim, Sun-Cheol;Han, Jong-Mon
    • Proceedings of the KSR Conference
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    • 2008.06a
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    • pp.1662-1671
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    • 2008
  • The ERS(Embedded Rail Track system) is constructed in the world due to a slab track system having maintenance free, high structural safety, and deduction of noise and vibration. The ADRI-ERS is developed as Korean type. This paper shows that the design of ADRI-ERS and experiments according to DIN EN 13481-5 and Korea high speed train test guidelines. The ADRI-ERS has high structural safety in pull-out test, longitudinal resistance test, and fatigue test. The design method of ADRI-ERS is proposed by two design constants due to the result of experiments also.

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A Study on Anti-Submarine Surveillance Systems using Submarine's Turbulent Wake (비음향신호(난류항적)를 이용한 대잠 탐색 및 감시체계 적용방안 연구)

  • Lee, Yong-Chol;Lim, Se-Han;Park, Jong-Jin;Jin, Jong-Han;Knag, Woong;Lee, Mon-Jin;Kim, Yun-Bae
    • Journal of the Korea Institute of Military Science and Technology
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    • v.15 no.2
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    • pp.138-146
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    • 2012
  • Using Shear-free Ship wake theory it was predicted the detectable submarine's turbulent wake on the sea surface was about 12km long when there was no breaking waves on the sea surface. It means that there are sufficient detectable turbulent kinetic energies on the sea surface as well as in the water. In this paper, we have proposed some concepts of non acoustic anti-submarine surveillance systems; SAR for sea surface surveillance, LIDAR for sub-surface surveillance and propelled gliders for under -water surveillance.

An analysis of the End-User electric power consumption trends using the load curve during international conflict (수용가 부하곡선을 일용한 국제분쟁시 전력사용 행태분석)

  • Son Hak Sig;Kim In Su;Park Yong Uk;Im Sang Kug;Kim Jae Chul
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.165-167
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    • 2004
  • End-user electric power consumption trends shows various load curves dependant on industry, contract, season, day and time. Analysis of end-user electric power consumption trends has a key role to efficiently meet electricity demand. There are several factors of change in electricity demand such as the change of weather, international conflict, and industrial trends during summer. This paper has analyzed the analysis the end-user electric power consumption trends using the load curve during international conflict. We observed that international conflict decreased electric demand by $5.4\%$. This increase is not significant, and therefore we conclude that the international conflict has not greatly affected Korea's electricity demands. This paper provides useful information so as to mon: efficiently perform demand side management.

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