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      • 무선 애드 혹 기반 액티브네트워크상에서 QoS지원에 관한 연구

        李基源,裵振勝,丁燦赫,金玄郁,李光培,姜景仁,朴京培,文泰洙,郭承郁,河載承 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-

        Abstract - In this thesis, we propose a QoS supporting method on wireless ad hoc-based active network for improving reliability. On the loss of route path, the existing DSR routing protocol has several problems with wireless network communication because of decease of data reception rate and increase of network load. The proposed method improves reliability of data transfer by using functions of active network. That is, by using functions of active nodes and active packets, the proposed method supports QoS with reservation transfer method that saves data packets on transfer at intermediate nodes with lost path and then re-transmit the packets after route reconfiguration.

      • SCIESCOPUSKCI등재
      • 전계발광소자를 위한 강유전체 박막의 제작 및 특성

        배승춘,김정환,김호운,박성근,김기완 경북대학교 센서기술연구소 1997 센서技術學術大會論文集 Vol.8 No.1

        PLT and PLZT feroelectric thin films were fabricated on ITO substrate by rf magnetron sputtering. Pressure was 30mTorr, rf power was 180W and substrate temperature was varied from room temperature to 500℃. In this case, PLT had the highest dielectric constant of 120 at 500 ℃, oppositly PLZT had the highest dielectric constant of 312 at room temperature. I-V characteristics of PLZT film were shown that leakage current of PLZT film deposited at room temperature was below 3μA at 100V.

      • KCI등재

        실내 스모그 챔버의 설계 및 성능평가

        배귀남,김민철,이승복,송기범,진현철,문길주 한국대기환경학회 2003 한국대기환경학회지 Vol.19 No.4

        A multi-functional indoor smog chamber was designed and evaluated lo investigate photochenical or water vapor reaction mechanisms of air pollutants. Various smog chamber experiments could be conducted using ambient air or purified air in this smog chamber. The smog chamber consisted of a housing, a Teflon bag, blacklights, injection ports, sampling ports, and utility facilities. The characteristics of light source, the wall losses of air pollutants, and the quality of purified air were experimentally investigated. The maximum NO₂ photolysis rate was 1.10min^(-1). In a 2.5-m³ Teflon bag, the wall losses of ambient O₃, NO, and NO₂were 1.2~2.4×10^(-3)min^(-1), 0.7~2.0×10^(-3)min^(-1), and 0.4-2.0×10^(-3)min^(-1), respectively. The wall loss of ambient particles ranging 0.05 to 0.2㎛ was 1.8~5.4×10^(-3)min^(-1), which was slightly higher than those of ambient gaseous species. The purified air supply system provided high quality of air with NO₂, < 1 ppb, and total hydrocarbons <5 ppb.

      • SCIESCOPUSKCI등재
      • 호주의 소프트웨어 교육과정 분석을 통한 국내 소프트웨어 교육의 방향성 고찰

        배영권, 신승기 대구교육대학교 초등교육연구소 2020 현장중심 초등교육연구 Vol.2 No.-

        With the advent of the 4th industrial revolution and social changes in the use of artificial intelligence in everyday life, there is a growing demand to reflect such changes in education in discussions on the methods of teaching and learning to cultivate talents who will lead the future society. Since the expected person through the 2015 revised curriculum aims to cultivate creative and convergent skills who have both humanities and science and technology literacy, software education was conducted as a required national curriculum. The key part of the unpredictable future change in society is problem-solving power based on computing thinking power. So, the countries around the world are making efforts to introduce thess changes into nation curriculum. This study examines how software education is organized in that Australia has a similar education system to South Korea and promotes education through national-level curriculum. In Australia, content elements to promote software education are selected in a series of courses from kindergarten to secondary education, and related content is covered in a separate subject, and by expanding this, information and communication technology capabilities are introduced as essential competencies for students. We are working together to improve literacy. Since software education is an important content to cultivate computing thinking ability and creative problem-solving ability, which are essential competencies of the future society, it will be the foundation for cultivating creative fusion-type talents through the organization of curriculums that take into consideration the circumstances. 4차산업혁명의 도래와 인공지능의 일상생활에서의 활용의 사회적인 변화에 따라 미래사회를 이끌어갈 인재를 양성하기 위한 교수학습의 방법에 대한 논의에서 교육에서도 이와 같은 변화 를 반영해야 한다는 요구가 높아지고 있다. 2015개정교육과정의 인재상은 인문학적소양과 과학 기술소양을 함께 갖춘 창의융합형 인재를 길러내는데 목표를 두고 있다는 점에서 미래의 필수 과학기술소양으로 소프트웨어교육이 교육과정 개정의 핵심 요소로 반영되어 필수교육과정으로 소프트웨어교육이 실시되었다. 예측하기 어려운 미래사회의 변화에서 핵심적인 부분은 컴퓨팅 사고력을 기반으로 한 문제해결력이라는 점에서 세계 각국에서는 이러한 변화를 국가수준교육 과정에 도입하기 위한 노력을 기울이고 있다. 특히 호주는 우리나라와 교육체계가 유사하며 국 가수준교육과정을 통해 교육의 방향을 정립하고 추진한다는 점에서 소프트웨어교육이 어떻게 편성되어 있는지를 본 연구를 통해 살펴보았다. 호주에서는 유치원에서 중등교육에 이르는 일 련의 과정에서 소프트웨어교육을 추진하기 위한 내용요소를 선정하고 별도의 교과에서 관련 내용을 다루고 있으며, 이를 확대하여 필수역량으로 정보통신기술역량을 도입하여 학생들의 정 보통신문해력을 향상시키기 위한 노력을 함께 기울이고 있다. 소프트웨어 교육은 미래사회의 필수역량인 컴퓨팅사고력과 창의적 문제해결력을 기르는 중요한 내용이라는 점에서 위계를 고 려한 교육과정 편성을 통해 창의융합형인재양성의 밑거름이 될 것이다.

      • 영양 장애 환자에 대한 지질 영양 수액제 "Trive-1000^(R)"의 효과에 대한 연구

        손기섭,배진선,장일성,노승무,박인근,김지연 충남대학교 의과대학 지역사회의학연구소 1992 충남의대잡지 Vol.19 No.2

        The association between malnutrition and poor hospital course in surgical patients is well recognized, although it may not involve the causation. When the period of NPO is needed more than several weeks, adequate caloric intake is difficult to maintain, and nutritional status often worsens especially after the operation. Trive-1000^(R) is a ready to use industrial ternary mixture. It fulfills standard requirements for TPN and has a advantage to decrease the cost because of time saving in preparation by the pharmacist and cost saving in disposables(transter sets, bags, filters). It improves safety by less risk of contamination and of error from handling and labelling. A prospective study was undertaken to evaluate the efficacy of Trive-1000^(R) in 34 malnourished patients after the major operation and the results were summarized as follows ; 1) The hemoglobin was not changed and AST, ALT, and bilirubin were increased and BUN and alkaline phosphatase were slightly increased without significance. 2) Mild to moderate toxicities including fever and chill, hepatopathy, thrombophlebitis and hyperglycemia. The infusion was discontinued in one of thrombophlebitis and one of hepatopathy. There results suggest that Trive-1000^(R) is relatively effective and safe TPN agents but requires the large scaled prospective randomized study.

      • SCOPUSSCIEKCI등재

        외상성 뇌지주막하출혈을 동반한 두부외상 환자의 예후인자

        길승배,김헌주,허철,한용표,홍순기,변진수 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.9

        The presence of traumatic subarachnoid hemorrhage on the initial computerized tomographic scans has been known to be associated with worse results. By means of a simple and reliable computerized tomographic grade system proposed by Greene and his colleagues, prognostic factors of the traumatic subarachnoid hemorrhage was significantly related to clinical outcome at the time of discharge from acute hospitalization. Between February 1992 and August 1995, 3975 patients were admitted to our department of neurosurgery due to head injury. Clinical data were retrospectively reviewed to ascertain the relationship of the thickness of traumatic subarachnoid hemorrhage, its location, evidence of mass lesion(s), midline shift, obliteration of the basal cistern, and cortical sulcal effacement to outcome. Additionally initial Glasgow coma scale score, arterial gas study systemic blood pressure and prothrombin time were also analyzed for the same purpose. Among 3975 head-injured patients. 213 patients were identified to have traumatic subarachnoid hemorrhage on the initial computerized tomographic scan. Among 213 traumatic subarachnoid hemorrhage patients, the patients treated with calcium channal blocker(32 patients) and 3 patients lost to follow-up were excluded from this study for a total of 178. The computerized tomographic scan findings were divided into a 3 grade system : Grade 1 indicating only traumatic subarachnoid hemorrhage. Grade 2 indicating traumatic subarachnoid hemorrhage with mass lesion(s). Grade 3 indicating traumatic subarachnoid hemorrhage with mass lesion(s) and midline shift. All these data were compared to Glasgow outcome scale on discharge, and arbitarily these were divided into the good(good recovery and moderate disability) and the bad(severe disability, vegetative state and death). The authors conclude that the contributing factors to outcome at discharge were as follows : 1 midline shift(p=0.002), PT≤70%(p<0.001), obliteration of the basal cistern(p=0.001) and cortical sulcal effacement(p=0.001) were shown to the statistically significant. 2. initial computerized tomographic grade contributed to outcome at discharge.

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