• Journal of Chest Surgery
• /
• 제20권4호
• /
• pp.851-854
• /
• 1987

Congenital diaphragmatic hernia remains a disease with high neonatal mortality rate despite recent advance in neonatal intensive care. We experienced one case of the congenital diaphragmatic hernia with acute respiratory distress and left pulmonary hypoplasia in the neonate. The simple closure was performed through left paramedian approach after diagnosis. The postoperative course was uneventful except wound disruption. The patient was follow-up with good general condition.

• 한국콘텐츠학회논문지
• /
• 제18권2호
• /
• pp.240-247
• /
• 2018

본 연구는 지역사회 재가노인을 대상으로 사전연명의료의향서(AD) 작성의도 영향 요인을 파악하기 위한 서술적 조사연구이다. 본 연구대상은 D 광역시에 거주하며 노인복지관을 이용하는 65세 이상의 남녀 노인 196명이다. 자료수집기간은 2016년 12월 8일에서 12월 19일까지였다. 수집된 자료는 SPSS 22.0 version을 이용하여, 서술통계, ${\chi}^2-test$, t-test, Logistic regression을 이용하여 분석하였다. 본 연구결과, 대상자 중 AD 작성 의도를 가진 경우는 58.2%였다. AD 작성의도에 따라 연령(${\chi}^2=4.92$, p=.020), 독거상태 (${\chi}^2=4.72$, p=.030 ), 주관적 건강상태(${\chi}^2=3.97$, p=.046), AD에 대한 인식 (t=-4.81, p<.001) 및 죽음에 대한 부정적 태도(t=2.01, p=.045)에서 통계적으로 유의한 차이가 나타났다. 회귀분석결과, AD 작성의도에 유의한 영향요인은 AD에 대한 인식으로 나타났다 (OR=11.87, p<.001, 95% CI=3.52~39.94). 따라서 노인의 AD에 대한 긍정적인 인식이 AD 작성 의도의 주요 예측변수임을 알 수 있다.

• 한국안전학회지
• /
• 제13권4호
• /
• pp.221-229
• /
• 1998

This study, with a view point to prevent accidents arising from steel structure, construction process, has taken an approach of reviewing related materials and construction safety guidelines, conducting questionnaire surveys and on field surveys. This study has also analyzed and classified accident cases and disclosed elements concerned with those accidents. A comparative analysis of the disclosed elements against the statutory provisions regarding industrial safety and it showed that strict observance of safety rules of the accident prevention measures in industrial safety standards will result in a decrease in accidents. It is concluded, however, that additional accident prevention measures, as suggested below, should be implemented for performing of more practical and positive accident prevention. 1) Thorough review and preparation at pre-working stage at sites : Such elements of fall preventing facilely as supporting ropes and steel fabrications for safety guard rails should be initially reflected on detailed drawings and shop drawings so that they can be installed in advance at fabricating plants. 2) Sets of steel frame stairs for work platform should be installed or secured with priority and temporary installation of such prefabricated platform as scaffolds should be installed in advance with those platform attached to the frame members on the ground whenever possible before they are lifted. 3) A decrease in the rate of accident by more than 10% on Tuesdays and Thursdays, has been shown from the accident analysis so schedule of construction process should consider possible weekday of high risk of accidents such as Tuesday and Thursday. 4) An array of systemized safety activities should be adopted, such as legal installation of safety facilities based on advance safety management plan, maintenance of safety for machinery and construction equipment, and strict compliance of safety rules by workers.

• 대한교통학회지
• /
• 제35권4호
• /
• pp.278-291
• /
• 2017

고속도로 공사장 교통관리구간 중 주의구간은 공사구간으로 진입하는 차량이 차로 변경을 수행해야 하는 구간으로 감속과 함께 안전한 차로변경이 가능하도록 교통안전표지가 설치되어야 한다. 본 연구에서는 주행시뮬레이션 분석을 통해 주의구간 내 운전자의 반응특성으로 고려한 교통안전표지 설치의 적정성을 평가하였다. 교통안전표지 위치 변경 및 제거를 통해 시나리오를 구성하고, 시나리오 별 교통안전표지의 설치 위치 적정성을 제한속도 순응률과 차로변경 안전도를 통해 비교 평가하였다. 분석 결과 제한속도 규제표지를 주의구간 상류부에 설치하여 공사구간 진입차량의 속도를 미리 감소키시고, 차로변경 주의표지를 주의구간 하류부에 설치하여 차로 변경을 최종적으로 유도하는 것이 운전자의 인지도 및 순응도 향상에 있어서 가장 효과적인 대안인 것으로 확인되었다. 본 연구의 결과는 향후 고속도로 공사장에서 발생하는 교통사고 예방을 위해 교통관리기준의 개정 시 유용하게 사용될 수 있을 것으로 기대된다.

• Journal of Advanced Marine Engineering and Technology
• /
• 제22권4호
• /
• pp.529-537
• /
• 1998

Currently as due to the rapid development of industry and increase in population we meet serious problems concerning the shortage and pollution of water. In the country many experts predict a shortage of water approaching 450 million tons by the year 2006. To cope with this serious problem it is necessary to construct desalination plants. In the adoption of a desalination system the most important factor is the cost of fresh water production,. In general LNG is stored in a tank as a liquid state below $-162^{\circ}C$. When it is serviced, however the LNG absorbs energy from a heat source and transforms to a high pressure gaseous state. During this process a huge amount of cold energy accumulated in cooling LNG is wasted. This wasted cold energy can be utilized to produce fresh water by using a sea water freezing desalination system. In order to develop a sea water freezing desalination system and to establish its design technique qualitative and quantitative data regarding the freezing behavior of sea water is required in advance, The goals of this study are to reveal the freezing behavior of sea water is required in advance. The goals of this study are to reveal the freezing mechanisms of sea water to measure the freezing rate and to investigate the freezing heat-transfer characteristics,. The experimental results will provide a general understanding of sea water freezing behavior in a rectangular vessel cooled from above.

• 한국정보통신학회:학술대회논문집
• /
• 한국해양정보통신학회 1999년도 추계종합학술대회
• /
• pp.193-198
• /
• 1999

In the 21th century, everyone feels that the multimedia system is close at hand in real life due to the rapid advance of the computer processing ability and high speed and high guality of communication services. Also the limited frequencies resource will be optimized due to rapid advances in digital video technology which is believed superior to analogue technology in information engineering. MEPG-2 has been introduced for broadcasting use such as digital TV Thus it features the high-definition and hyper-low bit rate. But, because of much throughput it has been implemented by high-priced private ASIC chip and is not in general use yet. But in this research, noticing the rapid enhancement of PC processor performance comparing with the price. MPEG-2 was developed by real time software MPEG-2 had been known impossible to implement with S/W, but the research proved the possibility of the S/W implementation and below are the pictures also in the research was improved 'Motion Vector and Compensation' Algorithm which requires the most operations and UT was made possible real time process. Multimedia Info Society has settled and accompanied by the rapid advance of image-processing technology and lots of standards.

• Tribology and Lubricants
• /
• 제34권6호
• /
• pp.284-291
• /
• 2018

Ball-milling for reactant powders in advance and using an induction heating system for Ni-Al intermetallic coating process are known to enhance the reactivity of combustion synthesis. In this work, the effects of the charging weight ratio of ball to powder in ball-milling for reactant Ni-Al powders and the synthesizing temperature in induction heating on sliding wear behavior of the coating layers are investigated. Sliding wear behavior of the coating layers is examined against a tool steel using a pin-on-disc type sliding wear machine. As results, wear of the coating layer ball-milled without ball was severely worn out at the sliding speed of 2m/s, regardless of the synthesizing temperature in induction heating. However, the wear rate of the coating layers at the sliding speed was remarkably decreased with increasing the charging weight ratio of ball in ball-milling for reactant powders. This can be explained by the fact that the void in the coating layer is disappeared and the coating layer is densified by the ball-milling. The evidence showed that pitting damages were disappeared on the worn surface of ball-milled coating layer. Consequentially, the Ni-Al intermetallic coating layer could have better wear resistance at all sliding speed ranges with the ball-milling for reactant powders in advance.

• 한국기계가공학회지
• /
• 제18권5호
• /
• pp.37-47
• /
• 2019

Recently, as demand for various paper containers has rapidly grown, it is inevitable that paper cup-forming machines have increased their manufacturing speed. However, the faster manufacturing speed naturally brings more frequent manufacturing failures, which decreases manufacturing efficiency. As such, it is necessary to develop a system that monitors the failures in real time and diagnoses the failure progress in advance. In this research, a paper cup-forming machine diagnosis system was developed. Three major failure targets, paper deviation, temperature failure, and abnormal vibration, which dominantly affect the manufacturing process when they occur, were monitored and diagnosed. To evaluate the developed diagnosis system, extensive experiments were performed with the actual data gathered from the paper cup-forming machine. Furthermore, the desired system validation was obtained. The proposed system is expected to anticipate and prevent serious promising failures in advance and lower the final defect rate considerably.

• 대한치과기공학회지
• /
• 제43권4호
• /
• pp.202-209
• /
• 2021

By classifying temporary denture production for surgical guides, digital guide-based surgery, and final prosthesis production, the problems of each process were assessed in advance and the factors that could be improved were confirmed in this study. The manufacturing process of fusion dental prosthesis uses virtual programs and computed tomography images to manufacture devices using the latest technologies of computer-aided design/computer-aided manufacturing and three-dimensional printing, which enables implants to be placed in the desired location in advance. Moreover, implant placement is not dependent on the skill and condition of the dentist, and because it uses a computer system, it can always be performed at a constant and optimal position. This can reduce the remanufacturing rate compared with the general method, shorten the treatment period, and eliminate patient discomfort. Unlike the traditional method of using impression materials and plaster models, digital fusion dental prostheses would be evaluated as a technology for producing prosthesis through professional design technology and communication.

• 무역학회지
• /
• 제46권1호
• /
• pp.23-38
• /
• 2021

This paper investigated the preference change of payment terms in international trade along with counteroffer or first offer conditions of the other parties. Studies on trade payment terms have mainly focused on payment term determination factors such as firm size, product price level, country credit rate, etc. We tried to find other factors affecting payment terms choice, during the negotiation process. We applied behavioral economics theories such as 'Status Quo Bias' and 'Anchoring effect' to build our research model. To prove the existence of the above effects, we proceeded with field experiments to the exporting companies in Alibaba.com. Both 'Status Quo Bias' and 'Anchoring effect' were found in the field experiment. Most of the exporting companies preferred traditional payment methods to new payment methods. And an initial request for a low advance payment ratio led to a lower advance payment ratio. Also, the experience of using new payment methods could diminish status quo bias. This paper applied behavioral economics theories and field experiment methodology to the payment term studies in international trades. These attempts could contribute to expanding the diversity of methodology and scope of international trade studies.