• Journal of the Korea institute for structural maintenance and inspection
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• v.22 no.4
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• pp.37-41
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• 2018

Recently, interest in the safety and maintenance of the structures is growing. However, due to the low-cost order placed by the ordering organization, the safety diagnosis specialized institution becomes insolvent and many problems have arisen due to insufficient inspection and diagnosis. Therefore, in this study, the current status of bid cost was examined through the survey of the practitioners and case analysis. As a result, Precision safety inspection is deemed that it is necessary to increase the efficiency of the criteria cost and to strengthen the rigidity of the criteria cost rather than adjusting the criteria cost. Precision safety diagnosis, the criteria cost for structures with a floor area of less than $10,000m^2$ is lowered to 80 % from the current standard. For structures larger than that, the current criteria cost are applied, but it is deemed necessary to strengthen the rigidity of the criteria cost.

• Journal of the Korean GEO-environmental Society
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• v.10 no.6
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• pp.5-18
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• 2009

In construction of buildings in Korea, the buildings are frequently founded on the weathered ground (weathered soil/rock, fractured rock). In this case, to make a full use of a bearing capacity of a weathered ground for economic design, the shallow mat foundation system could be used. In this study, we have researched three cases of mat foundations on the weathered ground in Korea, and analyzed and considered the design procedures and the reinforcing methods. That is, we have considered the detail design, analysis proceedings, the ground settlement evaluation proceedings, the rock face mapping evaluations after excavation and reinforcing methods of the mat foundation on the weathered ground. And large scale plate load tests on the weathered ground supporting the mat foundation were performed and also load bearing capacity and settlement of actual mat foundation, considering the scale effect, were evaluated.

• Journal of Korean Tunnelling and Underground Space Association
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• v.16 no.4
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• pp.373-386
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• 2014

This paper concerns the deformation behavior of tunnels crossing weak zone during excavation. A three dimensional finite element model was adopted in order to conduct a parametric study on the orientation of weaj zone in terms of strike and dip angle relative to the tunnel longitudinal axis. The results of the analyses were then analyzed so that the tunnel displacements in terms of the ratios between the crown settlement and springline displacement can be related to the orientation of the weak zone. The results indicate that the displacement ratios between the tunnel crown and springline tend to quantitatively change when a weak zone exists near or ahead of the tunnel suggesting that the displacement ratios can be effectively used to predict the weak zone during tunnelling. Practical implications of the findings are discussed.

• Journal of Mushroom
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• v.9 no.3
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• pp.96-100
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• 2011

MST247ns(Hwaseong #2) was developed by the method of Di-mon mating between monokaryotic strains derived from "Hwaseong #1" and dikaryotic strain "Suhan #1". The optimum temperature of mycelial growth was $25-30^{\circ}C$. The optimum temperature of primordia formation and fruiting body development were $8-15^{\circ}C$ and $9-14^{\circ}C$. Days of primordia formation were 4-5 days later Suhan #1. The stipes were longer than "Suhan #1". The surfaces of stipe were white and the tissues got harder and more elastic. Therefore, the management of growth environment under low temperatures was relatively easy and storability got much better.

• Geophysics and Geophysical Exploration
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• v.21 no.3
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• pp.162-170
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• 2018

The purpose of this study is to understand the ground change of large scale mountainous region and to estimate the active weak zone using geophysical exploration (electrical resistivity and refraction seismic explorations) in large scale deep landslide area located in Wanjugun, Jeollabukdo. We also analyzed the characteristics of deep landslides occurred in metamorphic rocks region and confirmed the approximate scale. As a result of comparative analysis of N-value by standard penetration test (SPT), low resistivity anomaly, and tension crack identified from field investigation, a discontinuity in soil layer was estimated at 10 ~ 15 m below the surface. Based on this results, the distribution pattern of active weak zone was confirmed between the discontinuity in soil layer and estimation line of bedrock.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.5
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• pp.3293-3302
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• 2015

This study was conducted to identify families' perception and attitude toward application of physical restraint(PR) in general neurological wards. The study is based on subjects from 70 family members who have cared patients applying PR. Data was collected using self-report questionnaires and reviewing of patients' medical records. 68.6% of subjects were female and the mean age was 47.9 years old. Family members were either sons, daughters or spouses. The questionnaires analyzed families' perceptions based on a score of 5, the results showed a mean score of 4.2, and items related to maintaining therapeutic tools scored the highest. The application of PR with two hands was perceived by families as more important than PR applied with one hand. In families' attitude toward PR, there was general agreement that families had the right to decide to apply and remove PR. Continuous education and information regarding PR is required to support families.

• Tunnel and Underground Space
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• v.21 no.5
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• pp.341-348
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• 2011

As a result of the detailed site investigation performed for the design of a 4.3 km long tunnel, geological anomalies of four fault zones and a rock boundary were discovered on the tunnel route. Most of all, it was confirmed that pyrite, which may corrode steel material, is contained inside the geological anomalies, and pressured ground water flows out of the fault fractured zone. To overcome these geological conditions, antisulfur concrete for the concrete lining and anticorrosive swelling rock bolts are designed in the pyrite-containing sections. For the sections where a great amount of groundwater outflows, water blocking methods including grouting are applied according to the result of numerical analyses on the seepage. In addition, since the past earthquakes occurred around Korea have take place mainly near fault zones, seismic analyses were performed based on the Soil-Structure Interaction (SSI) concept and the strength of concrete tunnel lining is designed to be 27 MPa from 24 MPa in order to reinforce the tunnel structure.

• 한국노년학
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• v.30 no.1
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• pp.49-63
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• 2010

The purpose of this research is to meta-analyze on a comparative basis interventions for preventing falls by the elderly in their 70's and 80's in the eight countries. Eleven studies conducted by RCT were found via Medline in Ovid, PsychInfo and Cochrane Database of Systematic Reviews. Use of Review Manager shows that interventions in the 70's group are effective (OR=0.65, 95%) but that those in the 80's group are not (OR=1.57, 95%). Furthermore, the effectiveness of the 70's treatment group is not durable. This paper has three policy implications: First, new intervention programmes for preventing falls by the 70's group should be developed toward increasing durability. Second, existing programmes for the 80's group should be amended to enhance effectiveness. Lastly, new programmes that include cognitive-behavioural components should be designed for elderly individuals suffering from mental diseases.

• Journal of the Korea institute for structural maintenance and inspection
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• v.23 no.1
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• pp.63-70
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• 2019

The number of vehicle-to-barrier collisions has increased due to improved driving environments. In addition, it is reported that the number of accidents led to impact severity larger than current capacity of a median barrier has increased. It is required to develop a high performance median barrier in order to secure expressway safety. This paper aims at proposing impact loading model and locations for a high performance median barrier based on analysis of median-barrier-related accident history. The SB6 test level (Impact severity: 420 kJ, Mass: 25 ton, Impact speed: 80 km/h, Impact angle: $15^{\circ}$) was suggested for target impact severity based on statistical data analysis. The suitable locations also were proposed from investigation of driver behaviors for installation and rehabilitation of high performance median barrier.

• 한국벤처창업학회:학술대회논문집
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• 2020.11a
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• pp.163-166
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• 2020

저출산으로 경제활동인구가 감소했는데도 청년실업자가 늘어난 나라는 한국, 이탈리아, 그리스인데 이는 OECD국가 중 유일하다. OECD 청년고용률은 2009년 40.5%에서 2019년 43.5%로 증가했지만 순위는 30위에서 32위로 하락했다. 코로나19사태로 매출이 감소한 국내 301개사는 채용을 미루거나 포기한 비율이 전체 50.5%애 이르면서 앞으로 청년 취업 상황을 악화시킬 것으로 보인다. 양질의 일자리가 증가하면 이를 통해 개인은 경쟁력을 확보하게 되고 산업은 고급 인력을 바탕으로 성장구조를 만든다. 따라서 민간과 정부는 창업을 적극적으로 독려하고 활성화 시킬 필요가 있다. 청년창업대상자를 중심으로 진행하는 사업은 중소벤처기업부의 청소년 비즈쿨 사업과 창업에듀, K-스타트업, 청년창업사관학교, 학생창업유망팀 300등이 있다. 그러나 대부분의 지원 사업이 초기창업단계에 지원역량이 강화되어 있고 공급자 위주로 창업지원 사업을 운영하다보니 창업 성과는 미미하다. 통계청 자료에 의하면 20대는 생계유지에 대한 문제와 창업자금으로 인해 창업을 망설이고 30대는 가족을 돌보는 것에 대한 부담감과 기업가에 대한 부정적인 인식으로 창업을 기피 하는데 이는 40대이상 다른 연령층보다 높게 나타났다. 본 연구는 개인적, 환경적 요인이 연령에 따라 창업의지에 어떤 영향을 미치는지 비교분석하여 일자리 활성화를 위한 정부의 청년창업지원대책 기초자료에 도움이 되고자 한다. 청년창업대상자의 금전에 대한 태도, 창업역량, 성공한 롤모델, SNS 활용능력, 창업지원정책, 사회적지지, 인적네트워크, 해외시장 관심도가 창업의지에 어떤 상관 관계를 갖는지 비교연구를 진행하고자 한다. 10대의 경우 취업과 창업을 고민하는 특성화고등학생 150명, 20대 150명, 30대 150명으로 총 450명의 데이터를 가지고 SPSS 23을 통해 다중회귀분석을 진행하고 원인을 비교해 앞으로의 정책이 창업을 독려하고 지속력을 갖기 위한 방향으로 시사점을 제안한다.