• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.7
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• pp.3444-3449
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• 2013

The control module controlling points has become high-tech. but the introduction of relevant company's inspection intervals and methods, and the adoption of the way which is used in relay interlock system became the cause of a failure by excessive and incorrect maintenance. The Human error in failure recovery process can cause vital accidents including train derailment, the points monitoring system could prevent this problem by monitoring points' operation condition in real time. After conducting the changed inspection intervals that applied the results of the criticality of each failure type, MTBF, MTTR, availability, maintainer's opinion, the work became simplified, and, the failure did not occur for 4 consecutive years in contrast to the previous annual average of 11 failures.

• Journal of the Korean Geosynthetics Society
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• v.11 no.3
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• pp.53-58
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• 2012

There are about 17,531 agricultural small dams and reservoirs in Korea. Ninety five percent of the small dams were constructed by earthfill and they were suffered severe damages or expected to repairs or rehabilitation. Therefore dams are evaluated and are identified their problems. Small Dams should be repaired before too late. Small dam safety evaluation is required to guarantee the proper functions of the existing agricultural dams and reservoirs in time and to minimize the damage.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.1177-1178
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• 2015

국내 전력설비는 70년대 이후 제3차 경제개발 5개년 계획에 따라 중화학공업의 발전과 함께 급속히 성장해왔다. 과거 개발 위주의 산업구조에서 급속히 팽창한 전력설비는 21세기에 들어서면서 30~40년 장기 사용에 따른 노후화가 진행되었고, 증가하는 전력수요에 대응하기 위한 발전 및 송전 용지 확보의 어려움으로 인하여 전력설비의 신규 증설에 많은 어려움을 격고 있는 실정이다. 따라서 전력설비의 안전성과 신뢰성을 확보하기 위해 적절한 교체시기 선정 및 최적의 자산관리 필요성에 대해서 최근 관심을 가지기 시작하였고, 이러한 전력설비의 최적 자산관리에 핵심적인 전력설비의 상태평가 기술의 발달로 과거 시간기준의 유지보수(Time Based Maintenance)에서 최근 노후설비의 증가와 진단기술의 발달에 따른 예방보전(Preventive Maintenance)에 의한 상태기준 유지보수(Condition Based Maintenance)개념으로 전환되고 있다. 고전압 회전기기(발전기, 전동기)의 상태평가를 위한 핵심기술인 Off-line 부분방전시험이 널리 적용되고 있으며, 본 논문에서는 부분방전 측정 시험 시 대상설비 단자부의 인출케이블에 의한 감도저하 현상에 대해 고찰 하였다.

• International Journal of Highway Engineering
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• v.15 no.6
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• pp.49-60
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• 2013

PURPOSES : The evaluation of the pavement condition of the asphalt concrete pavement of No. 2 runway of Inchon International Airport through PMS, a supporting system for making a decision of pavement, maintenance and repair, was made, and the proper time for repair according to the PCI reduction rate was suggested. METHODS : By comparing and analyzing the evaluation results of pavements built in 2009, 2010, 2011, PCI change in each facility (No. 2 runway, C parallel taxiway, connection taxiway) was calculated. By applying the calculated change to PCI deduction rate model, the pavement condition of the target sections was estimated, and then the necessary section and time for repair were chosen. RESULTS : After careful consideration of the time for pavement and maintenance, based on the result of PCI prediction, it was estimated that the southern takeoff and landing section of No. 2 runway was required to be repaired in 2012; connection taxiway in 2013; and C parallel taxiway in 2014; however, the section which is the main moving route of connection taxiway and C parallel taxiway was needed to be repaired in 2012. CONCLUSIONS : For maintenance and repair of airport pavements, the optimal alternative should be chosen by considering economics and operability, via examining the time for repair and the aspect of management all together on the basis of this study.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.286-286
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• 2021

벽골제는 전북 김제시에 위치하고 있으며 우리나라의 고대 저수지이다. 벽골제는 고대 농경사회의 대규모 토목사업으로 건설되었다. 약 2.5km의 제방이 현존하고 있다. 축조 시기는 삼국시대 서기 330년이다. 이후 통일신라 원성왕(AD.790)과 고려 현종 및 인종 때 보수되었으며 조선 태종(AD.1415)에 대대적인 보수를 하였다. 세종 2년(AD.1420)에 심한 폭우로 유실되었다. 그 후 일제강점기 1925년에 김제 간선수로로 개조함으로써 원형이 크게 훼손되었다. 벽골제는 우리나라뿐만 아니라 동아시아 고대 저수지로서 중요하다. 벽골제의 축조방식(부엽공법)과 측량기술은 일본 오사카부의 사야마이케(저수지)에 영향을 주었다. 사야마이케는 고대저수지로서 원형이 보존되어 있으며 유네스코 세계 유적으로 등재하기 위한 준비가 충실하게 진행되어 왔다. 본 연구에서는 벽골제가 고대저수지로서 가치를 인정받고 보존하기 위해 발굴되고 있다. 더불어 벽골제의 수공학적 능력 평가가 필요하다고 판단된다. 벽골제 유역을 대상으로 현재 지형과 최근이 수문자료를 이용하여 평가하였다. 발굴된 벽골제를 기준으로 유역을 설정하였다. 벽골제 유역 특성을 토대로 강우 분석을 수행하여 홍수량과 벽골제를 기준으로 수면적과 용적을 산정하였다. 벽골제에는 5개 수문이 있으며 3개는 Sluice Gate 형식(장생거, 중심거, 경장거)이고 2개의 월류형 형식(수여거, 유통거)으로 구성되어 있다. 최근에 수여거는 발굴 중이며 유통거는 미발굴 상태이다. 발굴된 수문의 규모를 토대로 수문 개방 정도에 따라, 웨어의 첨단고에 따라, 제내지의 수위를 조합하여 시나리오를 구성하였다. 시나리오에 따라서 최고수위를 산정하여 벽골제의 능력을 평가하였다. 이를 근거로 벽골제의 붕괴 원인을 추정해 보았다.

• Korean journal of communication and information
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• v.35
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• pp.329-361
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• 2006

This study focuses those periods of Kim Young-Sam and Kim Dae-Jung administration. This study tries to analyze any change in terms of ideological tendency and report attitude on the assessment of the government policy in the Korean newspapers from Kim Young-Sam to Kim Dae-Jung administration. Although these two civilian regimes were born after long periods of military dictatorship, there are many distinguished differences dividing these two. Kim Young-Sam could succeed through joining with the establishment of the power, while Kim Dae-Jung was elected as President through the horizontal shift of the power, opposition party becoming ruling party. Their power base was different. Another big difference is their North Korea policy. Kim Young-Sam administration's policy was conservative, while Kim Dae-Jung administration's policy was liberal. This study selected four Korean newspapers that represent each aspect of ideological spectrum in Korean media, and focused on the editorials of each paper as major analysis base. The four papers are Dong-a Ilbo, Chosun Ilbo, JoongAng Ilbo, and Hankyoreh. The study concludes that in terms of the report attitude on the assessment of the government policy, Dong-a, Chosun, JoongAng were more critical under Kim Dae-Jung administration than Kim Young-Sam administration. And Hankyoreh became more supportive of Kim Dae-Jung policy. In terms of the ideological tendency, four newspapers altogether did not change their ideological color regardless of the change in the administration. However conservative color became thinner( Dong-a, Chosun, JoongAng) and liberal color became thicker(Hankyoreh) a little under Kim Dae-Jung administration than Kim Young-Sam administration. Each newspaper tried to show their ideological tendency clearly in order to influence on government policy.

• Journal of Life Science
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• v.19 no.10
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• pp.1368-1373
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• 2009

The purpose of this study was to assess the influence of waist size on the reliability and validity of pedometers to count steps in children and youth. The participants for this study were 20 children and youth, composed of 14 Hispanic and 6 Caucasian children. Ten children and youth had waist circumferences greater than the $85^{th}$ percentile (Body Mass Index (BMI)=$28.91\pm3.07$), and 10 children and youth had waist circumferences smaller than the $50^{th}$ percentile (BMI=$18.05\pm1.55$). To examine pedometer reliability, each child completed 3 ascent and descent trials up a set of 15 stairs while wearing a Yamax SW-701 pedometer. The main effect of trials was not statistically significant for the stair ascent trials F (2, 36)=2.575 or for the descent trials F (2, 36)=0.235. The trial by group interaction was also not statistically significant. To examine the influence of waist circumference on the validity of the pedometer in counting walking steps at a self-selected walking pace, the children and youth in the two groups completed a 400-m course. The main effect on the groups was statistically significant, F (1, 18)=7.489. The main effect of counting techniques was not statistically significant, F (1, 18)=2.983 (hand-counted vs. pedometer counted). Overall, the trial and trial by group interaction comparisons for the 400-m walk were not statistically significant, suggesting that the pedometer was equally valid as a tool for assessing walking steps in high waist circumference (HWC) and low waist circumference (LWC) in children and youth.

• Journal of the korean academy of Pediatric Dentistry
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• v.48 no.3
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• pp.333-343
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• 2021

The purpose of this study was to investigate current status of sedation training for the residents in pediatric dentistry training institutions and opinions about continuing education after the residency program. Surveys were sent to 18 pediatric dentistry training institutions by e-mail, and the responses were collected and analyzed. Most of the sedation education period for the residents were the 1st-year education (61.1%) and 1 - 3 years of integrated education (55.6%). In terms of an externship, 5 institutions (27.8%) sent their residents to the department of anesthesiology. Second half of the 1st year (50%) was the highest for a resident to use sedation for the first time. The period of supervisor participation varied from not participating at all to whole time throughout the residency program. The sedation training is conducted at all training institutions, but there were variations in the experience that a resident can gain. All training institutions agreed on the necessity of continuing education of the sedation, but there were various opinions regarding time, method, and the period of review course. Overall, this study suggested that continuing education should be consisted of 1 - 2 hours of didactic education every year and clinical skills and simulation training in every 2 - 3 years.

• Korean Journal of Medicinal Crop Science
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• v.6 no.4
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• pp.251-257
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• 1998

This experiment was carried out to establish cutting propagation method of dendropanax morbifera $L_{EV}\$. at Wando in Chonnam, native area. The hardwood cutting and the greenwood cutting were able to be used as propagation method, but callus formation and rooting ratio in the greenwood cutting were higher than in hardwood cutting. The optimum cutting time was February to middle of March in hardwood cutting and July to August in greenwood cutting. The earthen-ball cutting method was better than normal cutting method in callus formation and rooting ratio. The rooting in different bed soils was the best at sand-loam soil. The application of IBA 100ppm promoted rooting.

• Korean Journal of Social Issues
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• v.18 no.1
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• pp.33-56
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• 2017

이 연구에서는 서구와 한국에서의 신자유주의화에 대한 기존의 연구성과들에 기반하여 한국적 신자유주의의 특징을 규명하고, 이명박 정부 이후의 구체적인 정책 변화를 검토하여 국가의 정책이 사회적 불평등에 어떠한 영향을 미쳐 왔는지를 확인하고자 한다. 전체적으로 이 연구가 던지는 질문은 다음과 같다: "국민경제는 계속 성장하고 있다는데, 나는 왜 먹고살기가 더욱 어려워지는가?"라는 질문에 대해 어떻게 대답할 것인가? 이 연구는 이론적인 차원에서 이에 대한 대답은 '신자유주의적 금융화의 진전'이라는 현상과 관련하여 설명되어야 한다는 관점에서 출발한다. 이러한 방식의 설명을 위해 이 글에서 파악하고자 하는 내용은 다음과 같다: 한국에서 신자유주의화 또는 금융화가 전개되는 독특한 양식은 무엇인가? '보수정부' 9년간의 사회경제정책은 이전 시기에 비해 어떤 특징을 나타내는가? 그리고, 이 시기에 한국사회의 사회적 불평등의 정도는 실제로 어떻게 변화하였는가? 글은 신자유주의에 대한 새로운 이론이나 금융화 및 불평등에 대한 새로운 경험적 자료를 제시하기 보다는, 금융화와 불평등에 대한 기존의 논의들을 살펴보고 한국의 신자유주의 및 금융화가 진화해 온 방식과 그 지형도를 그리는 것을 목표로 한다. 그리고 이러한 작업을 통해 향후 기대되는 연구의 방향을 제시하고자 한다. 연구는 첫째로 지난 9년간 전개된 금융정책은 금융이 산업을 지배한다기보다는 오히려 정 반대의 과정으로 진행되도록 했다는 점을 제시할 것이다. 또한, '일하는 복지'라는 사회복지정책 의제와 금융장치의 결합을 통해 개개인의 금융활동에 대한 의존을 심화시켰다는 점을 제시할 것이다. 이러한 정책적 변화들은 곧 물질적인 평등뿐만 아니라, '사회적 권리'로서의 평등을 악화시켰다고 관찰된다.