• Journal of Korean Neurosurgical Society
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• 제62권5호
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• pp.502-518
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• 2019

Objective : Since less invasive endovascular treatment was introduced to South Korea in 1994, a considerable proportion of endovascular treatments have been performed by neuroradiology doctors, and endovascular treatments by vascular neurosurgeons have recently increased. However, few specific statistics are known regarding how many endovascular treatments are performed by neurosurgeons. Thus, authors compared endovascular treatments collaboratively performed by vascular neurosurgeons with all cases throughout South Korea from 2013 to 2017 to elucidate the role of neurosurgeons in the field of endovascular treatment in South Korea. Methods : The Society of Korean Endovascular Neurosurgeons (SKEN) has issued annual reports every year since 2014. These reports cover statistics on endovascular treatments collaboratively or individually performed by SKEN members from 2013 to 2017. The data was requested and collected from vascular neurosurgeons in various hospitals. The study involved 77 hospitals in its first year, and 100 in its last. National statistics on endovascular treatment from all over South Korea were obtained from the Healthcare Bigdata Hub website of the Health Insurance Review & Assessment Service based on the Electronic Data Interchange (EDI) codes (in the case of intra-arterial (IA) thrombolysis, however, statistics were based on a combination of the EDI and I63 codes, a cerebral infarction disease code) from 2013 to 2017. These two data sets were directly compared and the ratios were obtained. Results : Regionally, during the entire study period, endovascular treatments by SKEN members were most common in Gyeonggido, followed by Seoul and Busan. Among the endovascular treatments, conventional cerebral angiography was the most common, followed by cerebral aneurysmal coiling, endovascular treatments for ischemic stroke, and finally endovascular treatments for vascular malformation and tumor embolization. The number of endovascular treatments performed by SKEN members increased every year. Conclusion : The SKEN members have been responsible for the major role of endovascular treatments in South Korea for the recent 5 years. This was achieved through the perseverance of senior members who started out in the midst of hardship, the establishment of standards for the training/certification of endovascular neurosurgery, and the enthusiasm of current SKEN members who followed. To provide better treatment to patients, we will have to make further progress in SKEN.

• 한국조경학회지
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• 제39권5호
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• pp.21-32
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• 2011

지구단위계획에서는 형식적으로 조성되는 경직된 제도의 모습을 벗어나기 위하여 구역 내 총체적인 계획의 일부분으로 건물 세부 기준뿐만 아니라, 공개공지의 배치, 형태 및 포상에 대한 가이드라인을 제시하고 있다. 문제점을 가지고 있는 도시환경정비기본계획(2005년 수립)이 그동안 도심부의 여건 변화를 반영하기 위하여 재정비되면서 구역별 개발유도 지침에 공개공지 부문이 세분화 되었다. 이러한 제도가 공개공지계획에 있어 실효성 있는 제도인지 개정 전 후를 비교해 본 결과, 도시 및 주거 환경정비법 상 공개공지 관련 수립지침의 부재로 공개공지계획 시 공통적으로 지켜야 하는 건축법과 별반 다를 것이 없는 항목이 신설되어 개정되기 전과 괄목할만한 변경사항이 없다는 분석 내용이다. 지구단위계획과 비교 분석해 본 결과, 지구단위계획 상 공개공지계획은 상위법인 건축법, 서울시 건축조례와 동일한 조성 기준이 한가지만 존재하고, 대부분은 제1종지구단위계획수립지침을 통해 신설된 조성 기준들이다. 반면, 도시환경정비기본계획상 공개공지계획의 속성은 절반이 상위법인 건축법과 서울시 건축조례와 동일하거나 유사한 항목이다. 건축법과 같은 공통적으로 지켜야 하는 상위법에서는 설치기준 등과 같은 필수적인 요소들의 나열이라면, 하위법에서는 주변 환경과 공개공지의 적극적인 연계로 공개공지의 의의에 맞게 구체적이고, 실효성 있는 미시적인 측면의 조성 기준이 만들어져야 할 것이다.

• 한국식품위생안전성학회지
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• 제34권2호
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• pp.212-218
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• 2019

식품 안전 규제에서 위해물질에 대한 국내 기준 설정시 국제식품규격위원회(Codex Alimentarius Commission, CAC) 기준과의 조화를 위한 검토가 요구되며 이를 위해서는 코덱스 식품분류에 대한 정확한 이해가 필요하다. 따라서 여기에서는 CAC(코덱스) 식품분류 개정 작업이 2017년에 완료된 곡류, 그리고 2018년에 완료된 견과종실류와 허브 및 향신료에 대해 개정된 코덱스 식품분류 내용을 소개하고자 하였다. 그 내용을 간략히 요약하면 다음과 같다. 코덱스 식품분류에는 국내 식품분류(식품의약품안전처의 분류)에서 곡류에 해당하는 것으로 Group 020 cereal grains (6개 subgroup), 견과종실류에 해당하는 것으로 3개 그룹, Group 022 tree nuts (subgroup 없음), Group 023 oil seeds and oilfruits (5개 subgroup), Group 024 seeds for beverages and sweets (subgroup 없음)가 있다. 그리고 허브와 향신료의 경우 코덱스에는 2개 그룹, Group 027 (3개 subgroup), Group 028 (9개 subgroup)이 있다. 코덱스 식품분류에서 식품에 부여된 commodity code의 수는 Group 020 27개, Group 022 32개, Group 023 46개, Group 0244개, Group 027 127개, Group 028 138개 이다. 한편 코덱스와 식품의약품안전처의 식품분류 사이에는 여러 차이점이 있었다. 예를 들면 국내 식품분류에서는 곡류나 허브를 코덱스처럼 세분화하지 않았고 코덱스와 달리 땅콩을 견과류에 묶어서 한 그룹으로 분류하고 있고 기타식물류를 두었다. 코덱스 식품분류를 사용할 때 이러한 차이에 대한 주의가 필요하다.

• 한국수소및신에너지학회논문집
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• 제28권6호
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• pp.601-609
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• 2017

Hydrogen is a clean, endlessly produced energy and it is easy to store and transfer. So, hydrogen is regarded as next generation energy. Among various ways for hydrogen production, the way to produce hydrogen by water electrolysis can effectively respond to fossil fuel's depletion or climate change. As interest in hydrogen has increased, related research has been actively conducted in many countries. In this study, we analyzed the performance characteristics and safety of water electrolysis system. In this study, we analyzed the performance characteristics and safety of water electrolysis system. The items for safety performance evaluation of the water electrolysis system were derived through analysis of international regulations, codes, and standards on hydrogen. Also, a prototype of the overall safety performance evaluation station was designed and developed. The demonstration test was performed with a prototype $10Nm^3/h$ class water electrolysis system that operated stably under various pressure conditions while measuring the stack and system efficiency. At 0.7MPa, the efficiency of the alkaline water electrolysis stack and the system that used in this study was 76.3% and 49.8% respectively. Through the GC analysis in produced $H_2$, the $N_2$ (5,157ppm) and $O_2$ (1,646 ppm) among Ar, $O_2$, $N_2$, CO and $CO_2$ confirmed as main impurities. It can be possible that the result of this study can apply to establish the safety standards for the hydrogen production system by water electrolysis.

• Structural Monitoring and Maintenance
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• 제2권3호
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• pp.269-282
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• 2015

Civil structures should be designed with the lowest cost and longest lifetime possible and without service failure. The efficient and sustainable use of materials in building design and construction has always been at the forefront for civil engineers and environmentalists. Timber is one of the best contenders for these purposes particularly in terms of aesthetics; fire protection; strength-to-weight ratio; acoustic properties and seismic resistance. In recent years, timber has been used in commercial and taller buildings due to these significant advantages. It should be noted that, since the launch of the modern building standards and codes, a number of different structural systems have been developed to stabilise steel or concrete multistorey buildings, however, structural analysis of high-rise and multi-storey timber frame buildings subjected to lateral loads has not yet been fully understood. Additionally, timber degradation can occur as a result of biological decay of the elements and overloading that can result in structural damage. In such structures, the deficient members and joints require strengthening in order to satisfy new code requirements; determine acceptable level of safety; and avoid brittle failure following earthquake actions. This paper investigates performance assessment and damage assessment of older multi-storey timber buildings. One approach is to retrofit the beams in order to increase the ductility of the frame. Experimental studies indicate that Sprayed Fibre Reinforced Polymer (SFRP) repairing/retrofitting not only updates the integrity of the joint, but also increases its strength; stiffness; and ductility in such a way that the joint remains elastic. Non-linear finite element analysis ('pushover') is carried out to study the behaviour of the structure subjected to simulated gravity and lateral loads. A new global index is re-assessed for damage assessment of the plain and SFRP-retrofitted frames using capacity curves obtained from pushover analysis. This study shows that the proposed method is suitable for structural damage assessment of aged timber buildings. Also SFRP retrofitting can potentially improve the performance and load carrying capacity of the structure.

• 한국항해항만학회지
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• 제26권5호
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• pp.497-504
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• 2002

우리나라 해양사고 조사매뉴얼은 국제적인 해양사고 조사지침과 코드 등을 수용하지 못하여 국제 기준과 절차 및 흐름에 뒤떨어져 있고, 새로운 시대와 여건에 맞는 독자적인 조사매뉴얼이 없는 실정이다. 이 연구에서는 한국과 일본 및 미국 해양사고 조사기관의 조사 매뉴얼을 비교ㆍ분석하여 우리나라 조사매뉴얼의 문제점을 도출하고, 우리 실정에 맞는 새로운 조사매뉴얼의 제정 방안을 제시하고자 한다.

• 비파괴검사학회지
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• 제24권4호
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• pp.390-395
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• 2004

iSIMS는 한국 수력원자력 주식회사의 원자력발전소에서 수행하는 가동전/중 검사 절차를 지원하는 웹베이스의 통합 정보 시스템이다. 이 시스템은 가동전/중 검사에 적합한 적용규격(CODE, Standards) 및 규제기관에서 원하는 규제조건 등과 부합하는 검사 계획단계에서 최종 보고서 단계까지의 전체 검사공정을 지원하는데 목적을 두고 있다. 이 시스템의 주요 기능은 검사계획, 검사 및 보고서출력, 검사과정 통제 및 해당 검사부위의 정보 찾기와 그 부위를 비쥬얼하게 찾아 갈 수 있는 자원관리 부분으로 구성된다 본 시스템은 해당 용접부에 대해 2D로 된 위치정보와 3D로 제공되는 비쥬얼정보를 제공하고 이들은 데이터베이스 응용프로그램과 인터페이스 하여 서로에 대한 정보를 공유하여 사용자에게 제공한다. iSMIS는 데이터베이스 관리 도구, 2D와 3D 비쥬얼 도구 등의 상용 소프트웨어 패키지를 사용하여 구현하였다. iSIMS에 대한 주요 기능과 기술은 본문에 기술하였다.

• 대한치위생과학회지
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• 제5권2호
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• pp.113-121
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• 2022

Background: This study aimed to create and present content that can be used in the dental hygiene ethics process to help dental hygiene students develop desirable work ethics and ethical values. Methods: In order to operate the dental hygiene ethics course in all academic systems, one three-year dental hygiene professor and one four-year dental hygiene professor participated in setting core competencies and learning goals for the dental hygiene ethics course. The class consisted of two credits, two hours of theoretical classes, and class activity sheets developed according to the learning contents and learning topics for each week that can be operated for 15 weeks. Results: The contents of the dental hygiene ethics subject were developed to be conducted as theoretical education and case-oriented discussion classes. The 15-week class consisted of a theory lecture on dental hygiene work ethics (eight weeks), discussions and presentations for ethical decisions based on actual cases related to dental hygiene ethics (four weeks), and the design and presentation of individual professional mission statements and codes of conduct (three weeks). The class data for each week consisted of four stages: "Learning goal-thinking," "open-thinking," "learning content-thinking," and "according to learning goal." Conclusions: In order to establish desirable workplace ethics and ethical values for dental hygiene students, it is necessary to approach education in a way that values understanding and application of dental hygiene practices, legal and ethical standards, ethical decision-making models, and ethical principles.

• Steel and Composite Structures
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• 제47권2호
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• pp.269-287
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• 2023

The WGJ420 fire-resistant weathering (FRW) steel is developed and manufactured with standard yield strength of 420 MPa at room temperature, which is expected to significantly enhance the performance of steel structures with excellent fire and corrosion resistances, strong seismic capacity, high strength and ductility, good resilience and robustness. In this paper, the mechanical properties of FRW steel plates and buckling behavior of columns are investigated through tests at elevated temperatures. The stress-strain curves, mechanical properties of FRW steel such as modulus of elasticity, proof strength, tensile strength, as well as corresponding reduction factors are obtained and discussed. The recommended constitutive model based on the Ramberg-Osgood relationship, as well as the relevant formulas for mechanical properties are proposed, which provide fundamental mechanical parameters and references. A total of 12 FRW steel welded I-section columns with different slenderness ratios and buckling load ratios are tested under standard fire to understand the global buckling behavior in-depth. The influences of boundary conditions on the buckling failure modes as well as the critical temperatures are also investigated. In addition, the temperature distributions at different sections/locations of the columns are obtained. It is found that the buckling deformation curve can be divided into four stages: initial expansion stage, stable stage, compression stage and failure stage. The fire test results concluded that the residual buckling capacities of FRW steel columns are substantially higher than the conventional steel columns at elevated temperatures. Furthermore, the numerical results show good agreement with the fire test results in terms of the critical temperature and maximum axial elongation. Finally, the critical temperatures between the numerical results and various code/standard curves (GB 51249, Eurocode 3, AS 4100, BS 5950 and AISC) are compared and verified both in the buckling resistance domain and in the temperature domain. It is demonstrated that the FRW steel columns have sufficient safety redundancy for fire resistance when they are designed according to current codes or standards.

• 한국방재학회 논문집
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• 제10권3호
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• pp.61-69
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• 2010

지구 온난화와 도시화로 인한 자연 생태계의 악화가 지속됨에 따라 전 세계적으로 재난이 다양해지고 규모도 증가하고 있다. 이로 인한 재해 발생과 피해 규모가 급증하고 있으며 체계적인 재난관리가 시급한 실정이다. 국제적으로 9.11테러와 쓰나미 사건을 계기로 표준화된 재난관리의 필요성이 높아졌으며 재난관리표준을 수립하고 활용하기 위한 연구와 개발이 증가되고 있다. 따라서 본 연구에서는 국가재난관리표준(안)을 기반으로 재난관리 업무매뉴얼을 생성하여 재난관리계획 수립을 지원하고자 하였다. 이를 위해 현재 중앙행정기관에서 수행되고 있는 재난관리 활동을 분석하였고 재난관리 업무, 기능, 조직, 참조, 행동 라이브러리의 설계와 관리방안을 제시하였다. 또한 체계적인 재난관리 업무를 지원하고 재난관리 활동의 효율성을 극대화 할 수 있는 업무매뉴얼 생성 방안을 제시하였다. 업무매뉴얼은 재난 유형별 중앙행정기관에서 수행해야 할 업무와 필요한 긴급지원기능을 적용하고 참조정보와 행동요령 등을 포함시켜 재난관리에 있어 예방, 대비, 대응, 복구 단계별 체계적인 재난관리계획 수립을 용이하게 지원할 수 있다.