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RAID 시스템의 Log 관리에 의한 서버효율성 향상기법연구
박우영 ( Woo-young Park ),김재중 ( Jae-jung Kim ),곽계달 ( Kae-dal Kwack ),신승중 ( Seung-jung Shin ) 한국정보처리학회 2009 한국정보처리학회 학술대회논문집 Vol.16 No.2
이 Paper 는 Server 솔루션에서 사용되는 RAID 컨트롤러가 Disk 상의 에러(Error)를 처리하는 behavior 를 분석하고 이를 개선할 수 있는 방법을 제안한다. RAID Level 중에 가장 기본인 RAID 0는 주로 Internet portal site 의 Search Engines 이나 Media streaming Servers, 그리고 HD 영상 편집 시스템에서 사용된다. 그러나 Fault tolerance 가 지원되지 않기 때문에 Data Volume(logical Disk)의 보존성이 약한 취약점을 가지고 있다. 따라서 이것을 개선하고 Data 보존성을 높일 수 있는 방안을 제시한다.
Spark Plasma Sintering법에 의해 예비 성형된 Al-10Si-5Fe-1Zr 분말합금의 고온 압축변형 거동
박상춘 ( Sang Choon Park ),김목순 ( Mok Soon Kim ),김경택 ( Kyung Taek Kim ),신승용 ( Seung Young Shin ),이정근 ( Jeong Keun Lee ),류관호 ( Kwan Ho Ryu ) 대한금속재료학회(구 대한금속학회) 2011 대한금속·재료학회지 Vol.49 No.11
Compressive deformation behavior of Al-10Si-5Fe-1Zr (wt%) alloy preform fabricated by SPS(spark plasma sintering) of gas atomized powder was investigated in the temperature range from 380 to 480℃ and at strain rates from 1.0×10?3 to 1.0×100 s?1. Stress-strain curves showed a peak stress (σp) during initial stage of deformation, followed by a steady state flow at all temperatures and strain rates tested. The σp decreased with both increase in temperature and decrease in strain rate. Nearly full densification was found to occur in the compressively deformed specimens irrespective of test condition. TEM observation revealed a restricted grain growth during steady state flow.
신승원(Seung-Won Shin),김경섭(Kyeong-Seop Kim),이선주(Sun-Ju Lee),김동인(Dong-In Kim),김기덕(Kee-Deog Kim),박원서(Wonse Park) 대한전기학회 2009 전기학회논문지 Vol.58 No.6
In this study, a new method of dental plaque scoring is proposed by adopting new criteria to divide the tooth surface with utilizing the geometrical features of a tooth color image. For the possible clinical usage of our new plaque scoring system, GUI(Graphic User Interface) system is also implemented to estimate the numerical plaque index for a specific tooth by designing the supplementary database management module that handles dental plaque scores.
박주봉,신승중,Park, Joo-Bong,Shin, Seung-Jung 한국인터넷방송통신학회 2014 한국인터넷방송통신학회 논문지 Vol.14 No.6
최근 추세를 중심으로 특허청 분석에 따르면 12~08년 최근 5년 사이 엘리베이터 안전관련 특허출원이 급증하는 것을 확인할 수 있었고, 이를 안전에 대한 관심이 높아지고 있는 것으로 예측했다. 이에 본 논문은 13~09년 사이 승강기 안전 관련 특허자료를 취합 및 분석 후 시대별로 공통적으로 중요시 되는 승강기 안전요인이 안전제어, 비상제동, 도어개폐장치라는 것을 확인하였다. 신뢰성 분석을 통해 승강기 안전에 있어서 가중치가 높은 항목을 이 세 가지로 정의하고, 특허가 많이 출원된 요인을 시대적 배경을 통해 알아보고, 5년간의 자료를 기반으로 승강기 안전에 대한 사고예방기술을 종합하여 키넥트 장착 스카다시스템 승강기를 향후 승강기 제작 방향으로 제시한다. Recently, from 2008 to 2012, there are many of elevator safety patents from patent office survey. In this paper, we analyzed the elevator safety patent from 2009 to 2013, found out safety factor is safety control, emergency stop equipment and door opening equipment. Through reliability statistics, we defined the most important things for safety elevator factor is this three things, studied the reason about many patents. Finally, we propose the Kinect Scada elevator system for prevention safety accident.
지역사회 주민의 천식과 뇌졸중 및 심근경색증과 연관성 -2009년 지역사회건강조사를 바탕으로-
신승옥 ( Seung Ok Shin ),박종 ( Jong Park ),임순임 ( Sun Im Im ),권유진 ( Yu Jin Kwon ),심재순 ( Jae Soon Shim ),박문숙 ( Moon Sook Park ) 대한보건협회 2013 대한보건연구 Vol.39 No.2
Objectives: Stroke and myocardial infarction are the second and third highest causes of death in South Korea, respectively, and asthma is an inflammatory allergic disease that costs 4 trillion won annually to manage both directly and indirectly. Thus, this study was conducted to see if asthma is correlated with stroke and myocardial infarction. Methods: The subjects of this study were adults aged over 19 in 2009, of whom 4,452 people had stroke and 2,464, myocardial infarction. The investigation was done by analyzing the age, gender, education level, obesity, smoking and other diseases of the subjects, after which a logistic regression analysis was conducted to determine if there was a relation with asthma. Results: Among the stroke patients, there was a significant difference in the prevalence according to their gender, age, level of obesity, education level and smoking history. The percentage of asthma patients with stroke was 4.1%, which shows a significant difference. As for myocardial infarction, there was a significant difference in the prevalence when the patients were older, men, with a lower education level and were non-smokers. The percentage of asthma patients with myocardial infarction was 2.9%. The incidence of hypertension was 3.488 times higher in the stroke patients and 1.934 times higher in the myocardial infarction patients; of diabetes, 1.661 times higher in the stroke patients and 1.891 times higher in the myocardial infarction patients; and of hyperlipidemia, 1.569 times higher in the stroke patients and 2.899 times higher in the myocardial infarction patients. The prevalence of myocardial infarction was 2.575 times higher in the stroke group, and the prevalence of stroke was 2.470 times higher in the myocardial infarction group. In the asthma patients, the prevalence of stroke was 1.232 higher, which is 1.630 times higher than in the myocardial infarction group. Conclusion: The prevalence of asthma was 1.2 times higher in the stroke patients and 1.6 times higher in the myocardial infarction patients. Thus, asthma showed a significant correlation with stroke and myocardial infarction. However, because this study is a cross-sectional study that used questionnaires, we propose a prospective study to further investigate this relation.
박주봉,신승중,Park, Joo-Bong,Shin, Seung-Jung 한국인터넷방송통신학회 2014 한국인터넷방송통신학회 논문지 Vol.14 No.6
한국승강기안전관리원 사고현황 분석 자료에 따르면 안전사고 요인으로 이용자의 과실 부주의가 60%를 차지하여 안전한 엘리베이터 사용을 위한 수시 모니터링이 가능한 스마트 관리시스템의 필요성이 대두되는 시점이다. 이에 본 논문은 현재 엘리베이터 안전점검의 기준 및 사고 발생율을 살펴보고 기존 엘리베이터 관리시스템 구조와 자체 결함 감지 및 알림기능의 IOT기반 스마트 관리시스템 구조의 차이를 확인한다. 또한 엘리베이터 전문가 집단의 의사결정을 통해 IOT 기반 스마트 관리시스템을 도입할 경우 기대되는 관리 효과에 대해 신뢰성 검증을 한 뒤 기존 엘리베이터 안전사고의 주된 요인인 이용자의 과실 부주의에 대한 구체적 대안으로 제안한다. From Korea Elevator Safety Institute's report, the major accident factor of elevator is user's mistake, 60%. It means that the necessity of simple monitoring system. In this paper, we explain the standard of elevator safety check and the rate of accidents, then compare with old elevator managing system and new elevator managing system based on IOT technology. Also, we explain the reliability statistics of smart managing system based on expert's decision. Finally, we propose the smart managing system as the alternative method for decreasing the accident factor of elevator.
박주봉 ( Joo-bong Park ),이성희 ( Seong-hui Lee ),류대현 ( Dae-hyun Ryu ),신승중 ( Jung-seung Shin ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.1
최근 대기업과 중소기업의 양극화 현상이 심화됨에 따라 청년실업률이 높아져도 중소기업의 취업기피 현상이 나타나는 모순된 상황에 처해 있다. 이러한 상태가 지속되면 우수인력이 중소기업에 올수 없고, 중소기업은 인적자원의 한계를 벗어날 수 없다. 따라서 이러한 문제를 해결하기 위한 방법으로 오늘날 우리생활에 큰 변화를 일으키고 성장 잠재력이 큰 스마트 모바일 사업의 활용을 통해 대기업과 중소기업과의 공생관계를 긴밀히 하여 중소기업의 활성화를 하고자 한다.
콘크리트 슬래브 궤도 흙쌓기 구간의 강화노반 두께에 관한 연구
신승진(Shin Seung-Jin),신민호(Shin Min-Ho),박종관(Park Jong Guan),이일화(Lee Il-Wha) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
An active application of concrete track is being expected for the future constructions of Korea railroad. For the successful construction and design in embankment section, the roadbed behavior should be reasonably estimated using the proper analysis method. In this research, behaviors of reinforced roadbed constructed with the determined stiffness and thickness at embankment section were estimated through various design parameters and numerical analysis. A three dimensional finite element method was employed to determine the proper reinforced roadbed thickness at embankment section. The displacement and vertical stress caused by train loading were estimated and compared with the field test results. The bearing characteristics of concrete track roadbed were presented. Moreover, the method to determine thickness of reinforced roadbed was proposed.