• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.88-88
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• 2017

• Food Science and Preservation
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• v.18 no.5
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• pp.651-660
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• 2011

This study was conducted to evaluate the quality characteristics of and chilling injury development in 'Ooishiwase' plum fruits after harvest, according to the ripening stage and storage temperature. The fruits were harvested at three ripening stages (60, 80, and >90% skin color) and were then stored at 1, 4, 5, 6, and $20^{\circ}C$ cold-storage rooms for up to 48 days. The fruit quality parameters, respiration patterns, and chilling injury development were monitored during the storage periods and the three days of subsequent ripening at $20^{\circ}C$. The fruits harvested at the 60%-skin-color stage maintained the flesh firmness, color, weight loss, and TA, and their respiration rates and ethylene production were decreased compared with the 80%-or >90%-skin-color fruits, at a lower storage temperature. The major symptoms of chilling injuries in the Ooishiwase plums were gel breakdown, flesh browning, and flesh translucency. These symptoms appeared at all the low-storage-temperature and ripening treatment stages. When the fruits, however, were harvested at a more immature stage and were stored at a lower storage temperature, the chilling injury development decreased. These results show that the development of chilling injury in Ooishiwase plums is related to the climacteric behavior during cold storage.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.253-254
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• 2017

본 논문에서는 타인의 도움 없이 자율적으로 환자를 따라다니며 환자의 상태를 주기적으로 주치의에게 전달하는 스마트 링거대를 구현하였다. 기존의 링거대는 환자 혼자 끌고다니며 움직이기에는 여러 가지 불편한 점이 있다. 예를 들면 잠을 잘 때 링거대의 위치를 환자가 직접 옮겨놓고 자야하며, 옮기기도 몸이 불편한 환자 입장에서는 많은 어려움이 따른다. 또 링거액을 다 썼을 때도 간호사에게 직접 가서 말을 해야 하거나, 피가 역류했을 때도 불편한 몸을 이끌고 간호사에게 가야 한다. 이런 여러 가지 불편함을 스마트 링거대를 제작함으로써 링거대의 이동부터 여러 가지 도움이 필요한 상황이 발생 시 간호사에게 연락을 할 수 있도록 하며, 여러 가지 돌발 상황을 대비하여 추가적으로 심박동 및 체온을 측정하여 이상이 발생 할 시 자동적으로 간호사와 보호자에게 연락이 갈 수 있도록 함으로써 병원에서 환자에게도, 간호사에게도 큰 도움이 될 것이라고 사료된다.

• Development and Reproduction
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• v.2 no.2
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• pp.115-133
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• 1998

Recently public concerns about the endocrine disrupting chemicals (EDC) have resulted in the increased legistrative and regulatory attentions in many countries. Endocrine disrupter is an exogeneous chemical interfering the synthesis, transport binding, action or elimination of natural hormones in the body, which are responsible for the maintenance of homeostasis, reproduction, development and/or behavior. Reported possible harmful effects on human and animal lives, possible developmental anomalities, reproductive malfunctions and behaviors, and the ways of EDC accumulation in animal kingdom are reviewed. The current scientific papers and knowledges on the global contamination of EDCs demonstrates the conclusive data that EDCs have the potentials to cause the calamitous extermination of human and animal species by the global contamination.

• Journal of Korean Tunnelling and Underground Space Association
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• v.7 no.2
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• pp.177-186
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• 2005

World widely, the occurrences of earthquakes have been increased recently including to nations which earthquake often happen to like Japan. Taking into account that the earthquake acceleration at design was 0.154 g at the contigency level earthuake (CLE) with its geological condition, it resulted that this method must be the most efficient condition against the earthquake vibration to two lane cut-and cover tunnel. The correlations between the result of the shaking table test and its numerical analysis showed that the test data of the bending stress due to the earthquake vibration have been underestimated about 5 percents in case of the cut slope 1 : 0.6 and about 10 percent in case of the cut slope 1 : 1.2. However, on average, the results showed a similar tendency that the higher the height of the backfill of the EPS block was, the less the bending stress was.

• Journal of the Korean earth science society
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• v.24 no.4
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• pp.361-368
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• 2003

We have investigated the electric resistivity structure of the fault zone located in the Hongseong area where a big earthquake with M 5.0 occurred in 1978. Usually, Electric and Electromagnetic methods are broadly operated in the field of engineering works since these methods are effective to understand the distribution of geological weak zones - fault or fracture zones. We have conducted the dipole-dipole array resistivity method and MT(magnetotelluric) method and interpreted the resistivity distribution of the fault zone with the aid of various inversion methods. An MT survey was performed at 18 points along a 2.9 km survey line perpendicular to the fault line and a magnetic dipole source was used to enhance the S/N ratio in the high frequency. A Electric dipole-dipole array resistivity survey with the dipole length of 50 meters was carried out perpendicular to the fault. In view of two survey results, the fault marks the boundary between two opposite resistivity structures, especially the low resistivity zone is exhibited deeply through the prospective fault line. The result that the low resistivity zone is located at the center of the fault zone corresponds with the fact that the fault zone of the Hongseong area is active. We expect these results to provide basic information about the physical properties of fault zones in Korea.

• The Journal of Engineering Geology
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• v.32 no.3
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• pp.351-361
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• 2022

Numerical analysis performed to predict the behavior of Ipseok-dae columnar joints in Mudeungsan National Park to understand their stability and movement. The numerical analysis technique, 3DEC, is based on the discrete element method that can analysis discontinuities. The analysis used data for material properties derived from laboratory tests, which found that average density was 2.68 kN/m³, average normal stiffness was 3.15 GPa/m, average shear stiffness was 1.00 GPa/m, average cohesion was 0.51 MPa, and the average friction angle was 33°. The Ipseok-dae columnar joints were modeled on the basis of the field survey data for 15 joints located between the observation platform and the hiking trail. The numerical analysis assessed the behavior of each columnar joint by interpreting the displacement of the edges of its upper and lower surfaces. The greatest maximum displacement was found in columnar joint No. 6, and the greatest minimum displacement was found in joint No. 11. Analyzing the movements of five discontinuities in joint No. 11 indicated that the maximum displacement occurred at the 2nd level. The other levels were ordered 5th, 4th, 1st, and 3rd in terms of subsequent greatest displacements. Considering the total displacement in the 15 studied joints, the Ipseok-dae columnar joints are judged to be stable. However, considering the cultural and historical value of Mudeungsan National Park, it is regarded that the currents slope stability should be maintained by monitoring the individual rock blocks of the joints.

• Journal of the Korea institute for structural maintenance and inspection
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• v.28 no.1
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• pp.53-60
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• 2024

Compressive strength in concrete has many affecting parameters and varies with exposure conditions. Although the concrete has same mix proportions, its properties are different with exposure conditions, and sea-environment can be classified into three groups such as tidal, atmospheric, and sea submerged region particularly. In this study, compressive strength was evaluated on 7-year-cured concrete and the results from previous equations (KDS, ACI, CEB, and JSCE) were compared with them. Furthermore the strength and carbonation progress were evaluated on concrete cured for 7 years exposed to three different sea environment. Three levels of w/c (water to cement) ratio (0.37, 0.42, and 0.47) and three different exposure conditions (tidal, atmospheric, and submerged) were considered. The results from wet-cured condition are all higher than those from the previously proposed equations, and the results from different sea exposure conditions (tidal, atmospheric, and submerged region) were lower than those from wet-cured condition. A reduction of strength was evaluated with increasing w/c ratio and the minimum strength was evaluated in the sea-submerged conditions. Several experimental constants applicable to the previous equations were obtained from regression analysis since the strength change with w/c ratios were not considered in those equations. Regarding carbonation depth with different exposure conditions, higher carbonation depth clearly was observed with increasing w/c ratios, and evaluated in the order of atmospheric, submerged, and tidal region. Considerable carbonation depth was observed in submerged and tidal region due to sulfate ion and dissloved carbon dioxide as well.

• Annual Conference of KIPS
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• 2017.04a
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• pp.953-954
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• 2017

화재, 지진 등과 같은 대규모의 재난에 대비하는 것은 최근 매우 중요한 활동으로 인식되고 있다. 그러나 이러한 재난 대비 및 대처의 중요성 인식에도 불구하고, 많은 사람들이 실제 발생하는 재난 상황에서 적절한 대처를 하지 못하여 인명 또는 재산상의 피해가 발생하고 있다. 본 논문에서는 화재가 발생하는 경우의 신속한 대처를 지원하기 위한 가상현실 기반의 화재 대처 어플리케이션을 개발하고자 한다. 이는 화재 발생시, 소화전이나 소화기를 정확하고 올바르게 사용할 수 있도록 도와줄 뿐만 아니라, 대규모의 학생들에 대한 교육에도 매우 유용하게 활용될 수 있을 것이다.

• Journal of the korean veterinary medical association
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• v.34 no.4
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• pp.253-257
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• 1998

동물에서 발생되는 질병의 수는 헤아릴 수 없이 많으며, 병인체도 다양하다. 이러한 질병을 효과적으로 관리하기 위하여, 우리나라의 가축전염병예방법(개정법률 제 4,885호; 1995. 1. 5)에는 제1종 전염병 26종과 제 2종 전염병 28종, 총 54종을 법정가축전염병(法定家畜傳染病)으로 지정해 놓고 있다. 최근에 들어, 1996년 3월에 영국에서 소해면형뇌증 (일병 광우병, BSE)이 인체에서의 변형 크로이츠휄트-야곱병 (v-CJD)과 관련하여 세계적인 주목을 받음은 물론 유럽연합 (EU)을 중심으로한 쇠고기의 국제교역에 크게 영향을 미치고 있으며, 지난해(1997) 3월에는 대만에 구제역 (口蹄疫, FAD)이 발생하여, 여러 양돈장에 급속히 퍼져, 대만의 수출주력 산업인 양돈업의 붕괴를 가져왔을 뿐만 아니라 국가적인 경제위기를 초래하였으며, 연간 약 9조원의 경제적인 손실이 예상되고 있고 양돈경기 회복을 위하여는 막대한 자금(약 40조원)과 긴 세월(최소 4-5년)이 필요할것으로 생각되고 있다. 한편, 국제적으로는 아주 전통적인 질병이며 한동안 자취를 감추었던 광견병과 기종저가 개발하여 피해를 입히고 있으며, 아주 최근에 알려진 새로운 원충성 유산증을 일으키는 네오스포라증도 확인되고 있다. 본 편에서는, 최근 국내에서 특히 문제시 되고 있는 풍토병인 기종저(blackleg)에 대하여 그 발생실태와 임상진단, 방역대책 등에 관하여 고찰해 보고자 한다.