• 한국철도학회:학술대회논문집
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• 한국철도학회 2001년도 추계학술대회 논문집
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• pp.299-303
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• 2001

In this paper, we introduce the Partial Half-Through Type Plate Girder Bridge proposed by Hyundai Development Co. and KRTC Consortium in Turn-Key Based design last year, and this type of bridge may be adapted to the railway bridge under similar conditions. This bridge across the North Han River was to be concerned its find view and the protection of water source. For its location is inside the dam, it required the long span and the clearance for the flood also. Its new composite section was able to diminish the deflection and vibration. Its shop-fabrication could control its quality easily, and might to be launched. This structural type have satisfied its functions, construction situations, and overall safeties, so this is the field-oriented type. However the composition and connections of the proposed members are different to the recent forms, and difficult to be applied to present specifications. Therefore it requires a certification on the application for more safety by not only analytical verifications but also experimental studies. Nevertheless, this type of bridge may have some more applications from now on.

• 대한수사과학회지
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• 제1권2호
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• pp.44-56
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• 2006

The reform necessity of medicolegal death investigation system is continuously issued. The problems from the current death investigation system are discussed, specially on the professionalism of the involved personnel such as policemen, doctors, prosecutors. Death investigation exists not only to prosecute the criminals but also primarily to protect the general public's health, safety, and welfare. The reform proposals of death investigation system are followed as below. Statutes require that the prosecutor be notified of certain deaths. All deaths that may reasonably result from anything other than natural disease should be investigated. A death certificate is a legal document which authenticate a death, therefore it is issued by the doctor. The postmortem examination must be rearranged on the university base and performed by the qualified doctors who are trained at least in pathology. The police officer specified in death investigation and forensic identification should be encouraged to keep doing their special work in many ways.

• BMB Reports
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• 제50권3호
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• pp.111-116
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• 2017

Natural product drugs, or botanical drugs, are drugs composed of natural substances which have constituents with healthenhancing or medicinal activities. In Korea, government-led projects brought attention to botanical drugs invigorating domestic botanical drug industry. Foreign markets, as well, are growing bigger as the significance of botanical drugs stood out. To follow along with the tendency, Korea puts a lot of effort on developing botanical drugs suitable for global market. However, standards for approving drug sales vary by countries. And also, thorough standardization, certification, clinical studies and data of these will be required as well as data confirming safety and effectiveness. Meanwhile, as an international exchange in botanical drug market continues, the importance of plant resources was emphasized. Thus countries' ownership of domestic natural resources became vital. Not only establishing a systematic method to secure domestic plant resources, but also cooperation with other countries on sharing natural resources is essential to procure natural resources effectively. Korea started to show visible results with botanical drugs, and asthma/COPD treatment made out of speedwell is one example. Sufficient investment and government's active support for basic infrastructure for global botanical drugs will bring Korea to much higher level of botanical drug development.

• Composites Research
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• 제25권4호
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• pp.105-109
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• 2012

최근 국내에서 미국과 상호항공안전협정 체결을 위한 소형 항공기가 연구 개발 중이다. 연구 대상 항공기는 경량화 하여 연료 절감을 위해 전기체 복합재료가 적용되었다. 그러나 복합재 구조는 외부의 충격 손상에 취약한 구조이다. 따라서 항공기 구조물은 충격 손상에 대한 압축 파손 강도를 고려하여 손상 허용 설계가 반드시 수행되어야 한다. 이는 복합재 구조 항공기 인증에 매우 중요한 요소이다. 본 연구에서는 항공기 복합재 구조에 적용된 두꺼운 적층판에 대한 손상 허용 연구를 수행하였다. 두꺼운 적층판의 세 가지 형태인 손상이 없는 시편, 구멍 손상 및 충격 손상이 적용된 시편의 압축 하중 하에서 손상 허용 기준이 평가되었다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2006년도 춘계학술대회 논문집
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• pp.189-190
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• 2006

A patient table considering x-ray transparency, mechanical safety and compact multi-axis moving mechanism has been developed. The goal of medical imaging technology is to keep radiation exposure of patients during x-raying to a minimum. In order to obtain clear pictures at low dose, however, the x-ray table which supports the patient must be sufficiently permeable to radiation to allow good image resolution. The table top is made of low density foam for x-ray transparent effective area and structural aluminum plate to connect moving mechanism under the table, covered with thin carbon fiber. This sandwich construction is very rigid and lightweight, so the table top can handle relatively heavy load comparing to its cantilevered structure which is unavoidable as long as cooperate with C-arm radiography. To verify the design results finite element static analysis and experimental tests have been done. According to the verification the results well satisfy certification guide lines as a medical device.

• 한국생산제조학회지
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• 제24권6호
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• pp.613-618
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• 2015

In recent years, WorldSID has been continuously developed and investigated to be the representative biofidelic anthropomorphic test device (ATD) as well as the device for replacement of the current EuroSID-2. In Korea, the side impact accident is one of the major severe accidents in terms of the number of accidents and fatality. Since 2003, the side crash test with a speed of 50 kph in the perpendicular direction has been initiated as a safety standard with EuroSID-1 at the first stage. Simultaneously, a 55 kph impact test has been conducted as a part of Korean New Car Assessment (KNCAP). Currently, only EuroSIDE-2 is accepted as a regulatory tool for vehicle certification and KNCAP. The tests with WorldSID are conducted experimentally in order to use WorldSID of the KNCAP in near future.

• 한국항공우주학회지
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• 제37권9호
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• pp.931-938
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• 2009

비행시험은 개발 항공기의 다양한 성능검증을 포함하여 감항기술기준에 대한 안전성을 입증하는 최종시험으로서 중요성이 크다. 특히, 민간 항공기의 비행시험은 개발업체의 경험 및 노하우에 의해 기술 보호성격이 강하며, 다양한 시험항목과 비행조건에 의해 비용이나 시간측면에서 효율적인 비행시험 수행 및 비행시험 기법의 확보는 필수적이다. 본 논문에서는 이륙 및 착륙성능 입증을 위한 이착륙 비행시험에 대해 지상관측법과 DGPS를 활용한 비행시험 기법을 제안하고 실제 비행시험을 수행하여 그 결과를 비교하였다.

• 가정과삶의질연구
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• 제31권6호
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• pp.39-51
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• 2013

Because of the increasing demand for day care centers, The Korean government has enforced childcare accreditation. The government has created the evaluation certification system for child care facilities. But the system includes variable items, and the physical rules are not sufficient for ensuring security and quality amenities. So this study, through literature search, examined the rules of Child Care Centers in the U.S. and compared them with those in Korea focusing on the provision of security and amenities. The standards found in 4 U.S. states were investigated, and the results are as follows. The rule pertaining to the size of indoor activity spaces in C.C.C. allows the spaces to be smaller in Korea than in the U.S. There is no specific criterion for infants and toddlers in our standard. When comparing the standards of Korea with those of the United States, Korea's standards do not state specific rules about child care facilities such as indoor furniture, finishes and space planning. Additionally, the binding force ensuring compliance with the standards of physical facilities is weak. Thus, the ratings of child care standards for the physical environment should be presented in detail. And if a center does not comply with the criteria, stronger penalties will have to be imposed.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.603-609
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• 2008

개발품의 품질을 평가하기 위해 무엇을 어떻게 시험할 것인가 적합한 모델을 정하는 것은 중요하다. 개발된 제품의 대부분의 패키지화된 소프트웨어는 소스코드를 공개하지 않으므로 외부적인 동작 특성을 측정하여 평가한다. 고속철도 선로변 정보처리 기기는 단일계로 구성되어 있던 것을 최근에 2중화하므로 신뢰성을 향상하도록 개발하였다. 철도에 사용되는 용품에 대하여 성능 및 안전성을 확보하기 위하여 철도안전법에서 공인시험기관에서 품질인증을 받을 수 있도록 하고 있어 우선 규정의 적용 가능성을 검토를 하였다. 아울러 정보처리모듈 일반 및 전용 그리고 절체기에 대하여 H/W 와 S/W의 검증을 위하여 필요한 절차와 성능을 확인하는 방안을 검토하고, TFM(Track-side Functional Module) Tester기와 Simulator를 활용하여 보드별 성능시험을 하는 방안에 대하여 고찰하고자 한다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2002년도 춘계종합학술대회
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• pp.631-634
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• 2002

화상회의를 실행함에 있어서 중요한 회의 내용의 유출, 도용 등이 발생할 수 있기 때문에 보안성이 확보된 화상회의 시스템에 관한 연구가 계속되고 있다. 본 연구에서는 화상회의 시스템의 보안성에 대한 문제점을 해결하기 위하여 현재 사용되고 있는 사용자 인증과 같은 일반적인 암호화 기법 이외에 화상정보의 변조와 유출, 도용 등을 방지하기 위하여 영상을 암호화 하는 기법에 대하여 연구하였다, 영상 정보를 암호화하기 위해서 개선된 Vernam의 암호화 기법을 이용하였으며, 보다 안전한 화상회의 시스템을 구축하기 위하여 영상 분할 기법을 이용하여 화상을 여러 개의 모듈로 분할한 후 각각의 모듈로 암호를 합성하는 방법을 제안하였다.