• Journal of Navigation and Port Research
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• v.44 no.6
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• pp.453-459
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• 2020

A sea trial of the speed performance test is the one of the most important means of verifying a ship's performance, and the International Organization for Standardization established a standard for this test in 2015. Environmental disturbances such as wind and waves are always present under real sea conditions, however, so it is impossible to accurately estimate delivered horsepower under ideal conditions. These disruptive influences also make it difficult to evaluate the positive effect of recently developed energy-saving devices. In this study, uncertainty analysis of improved speed performance was carried out using Monte Carlo simulation to confirm the energy-saving efficiency of a ship equipped with an air-lubrication system. The findings showed the average power saving to be 3.2%, with the expanded uncertainty of ± 2.7% at a 95% confidence level (k=2).

• Journal of Powder Materials
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• v.29 no.2
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• pp.159-165
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• 2022

Rare earth elements, which are important components of motors, are in high demand and thus constantly get more expensive. This tendency is driven by the growth of the electric vehicle market, as well as environmental issues associated with rare-earth metal manufacturing. TC 298 of the ISO manages standardization in the areas of rare-earth recycling, measurement, and sustainability. Korea, a resource-poor country, is working on international standardization projects that focus on recycling and encouraging the domestic adoption of international standards. ITU-T has previously issued recommendations regarding the recycling of rare-earth metals from e-waste. ISO TC 298 expands on the previous recommendations and standards for promoting the recycling industry. Recycling-related rare earth standards and drafts covered by ISO TC 298, as well as Korea's strategies, are reviewed and discussed in this article.

• Journal of Korean Library and Information Science Society
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• v.53 no.3
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• pp.241-262
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• 2022

The purpose of this study was to designed the structure and elements of metadata that can manage and share research data produced in the food composition database. In order to derive metadata elements, mapping crosswalk was performed on 5 metadata such as DCAT, DataCite metadata schema 4.4, TTAK.KO-10.0976, AgMES, and FoodData Central. As a result of the study, the top 15 elements of the 'Resource information' metadata were derived, and 7 mendatory, 3 recommended and 5 optional elements, and the 'Composition analysis' metadata included 8 mendatory, 3 recommended and 1 optional element were derived to describe food composition research data, respectively. The derived metadata elements will be used as an item for systematic management of food composition data and can be used as basic data for sharing with domestic and international food composition databases.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.33 no.1
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• pp.78-90
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• 2023

Objectives: The purpose of this study is to standardize the process code of the work environment measurement database (WEMD) for the construction of a job-exposure matrix (JEM). Methods: The standard process code (SPC) was reclassified based on process similarity and drawing upon the code used in the existing K2B. It was supplemented through review by industrial hygiene experts. In addition, an index word database related to SPC was created and used for SPC search. A pilot evaluation project was conducted by experts to evaluate the validity of the newly reclassified standard process code. Results: A total of 70 final SPCs were developed, including 31 processes related to the construction industry. Using the Shiny program, we developed a standard code finder that can be used on the web (https://kscf.shinyapps.io/scf_app/). As a result of the pilot evaluation, it was determined that it was easier to search for standard codes than previous codes, so it was highly utilized. Conclusions: It is expected that JEM construction using industry-process information drawing on WEMD data will be possible using the 70 newly standardized process codes.

• Journal of the Korea Society of Computer and Information
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• v.14 no.5
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• pp.149-156
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• 2009

Korean WiBro becomes international standard to IEEE 802.16e, and We are carrying out a WiBro network business from capital regions. We executed eavesdropping about voices and messenger program and the VoIP which frequently happened in WiBro networks at these papers. We have a lot in common with the Wireshark which is a packet collection and an analyzer, and We execute eavesdropping, and We reproduce eavesdropping data with bases to a SIP, H.263, TCP, UDP protocol through packets. In time of a copy of a packet negative the VoIP which verify time with bases, and was eavesdropped on integrity packet and a X-Lite call record, be matched that a packet is counterfeit forgery did not work, and We demonstrate, and verify integrity. The data which integrity was verified put in a seaming envelope, and we prepare so as it is to a liver of investigator, and execute, and to be able to do use to proof data after seaming in courts in order to utilize as criminal investigation data.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.33 no.1
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• pp.279-299
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• 2022

This study tried to identify the reading and library use and requirements of children and young adults with disabilities in school age, and to suggest improvements in library policy, centered on the National Library for the Disabled Unlike the library policy centered on the creation of alternative materials and the establishment of an integrated cataloging system for alternative materials, children and young adults with disabilities mainly use paper books, and 80% of them hardly use the library. This study established a system centered on the special school library and proposed to establish a foundation for enjoying reading culture through curation of books by disability type and developmental age. In addition, based on the development of international standardization of multimedia collections, cooperation with the National Library for Children and Young Adults, and the expansion of librarian, collections, and budgets of special school libraries, linkage with students with disabilities in special classes of general schools was suggested.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.415-417
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• 2020

무형문화유산의 전수 방식은 장인과 이수자의 직접적인 교육으로만 이루어져 왔으며 또한 전수는 긴 시간 동안 이루어지고 전수 방식을 따로 기록하는 경우가 드물며 동작이나 구전으로만 전해지기 때문에 표준화된 전수는 이루어질 수 없었다. 현재 국제 유네스코와 국내문화재청에서는 유무형문화재에 대한 전수와 기록의 중요성을 알고 다양한 디지털 기록을 진행하고 있다. 하지만 4차 산업혁명 시대에 무형유산 기록화 기술은 보유자의 기 예능 장인 공법을 기록하는 부분으로 영상기록 및 사진기록 도서 음원 등 아직까지 기존 아날로그 기술 방법으로 기록이 이루어지고 있으며 최근 5G 상용화와 함께 디지털 4차 산업 혁명시대와 발맞춰 무형유산 정보관리 기관에서도 무형유산 ICT 기반 기술 지원을 활성화되고 있는 시점에서 본 연구는 오랜 시간 동안 숙련도 높은 기술공법으로 한국 전통문화의 맥을 이어가고 있는 무형문화재 장인들의 기술 중에서 손을 사용하는 바느질 중심으로 자이로센서 기반으로 정확한 손동작 정보를 획득하고 기록할 수 있는 시스템 설계 및 연구개발을 통하여 ICT 기반 장인 공법 4D 기록화 기술을 제시하고자 한다. 이와 같은 기술로 무형문화유산의 새로운 4D 기록 방법으로 정확하게 기록하고 보존하여 무형문화유산 전승과 교육을 할 수 있고 문화유산의 유형에 맞는 교육·산업·홍보 등 다양한 사용 목적에 맞는 형태로 폭넓게 사용될 수 있다.

• Convergence Security Journal
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• v.22 no.1
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• pp.159-166
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• 2022

The purpose of this study conducted to conduct a survey to understand the effect of security major college students' major selection motives on major satisfaction and career decisions. The questionnaire was written as "First, motivation for choice, second, major satisfaction, third, career decision". In this study, Chronbach's Alpha coefficient was calculated to analyze the reliability and importance of variables and to identify exploratory factors. And the Berimax method was performed. Both the AVE and CR values of the measured items were calculated to be above the reference value of 0.7, and thus, the convergent validity of each item was investigated as favorable. In the hypothesis test results, the standardization coefficient of 'selection motive ⇨ major satisfaction' was 0.653 and 'major satisfaction ⇨ career decision' was 0.403, so both research hypotheses were adopted. However, 'selection motive ⇨ career decision' was rejected with 0.392. In the future, universities and related professors seem to need more efforts to simultaneously increase the selection motive and major satisfaction in order to improve the career decisions of college security students.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.76-76
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• 2023

최근 자율주행과 관련한 시장의 관심은 기존 자동차 자율주행에서 선박 자율운항으로 자연스럽게 이동하고 있다. 이에 인공지능 및 빅데이터 등과 같은 최근 기술을 선박 자율주행에 적용하는 자율운항선박(MASS: Maritime Autonomous Surface Ship) 개발이 활발히 진행되고 있으며, 레이더 및 카메라 등과 같은 센서 정보를 선박 자율운항에 적용하여 다양한 선박 운동 및 정보를 획득하는 연구 기술이 집중되고 있다. 이러한 경향에 따라 IMO(International Maritime Organization)과 같은 국제기구에서도 자율운항선박 표준화 본격 논의로 기술표준 선점 경쟁에 참여하고 있다. 이 중 연안 자율운항선박 개발은 IMO에서 주관하는 무인화 핵심기술로 여겨지고 있어, 기존 대양 항해 기술과 함께 연안 항해에 대한 기술 개발의 중요성이 높아지고 있다. 특히 항만 인근 해역에서는 다수의 선박이 입출항함으로 인해 해상에서의 안전과 물류의 효율화가 요구되기 때문에 고도화된 자율운항 기술개발이 필요하다. 하지만 자율운항선박에서의 상황인식 기술은 탑재된 센서의 제한된 시야각 및 기상조건에 따른 인식률이 떨어지는 문제가 생긴다. 이러한 기술적 한계를 극복하기 위해 육상에 설치된 레이더를 활용하여 선박을 탐지할 수 있는 기술이 필요하다. 본 연구에서는 고해상도 육상 레이더를 기반하여 얻어진 레이더 화면상의 물표 정보를 이용해 인공지능 기법에 활용하기 위한 라벨링 자동 생성 방법에 대해 소개한다. 얻어진 물표 정보에 인공지능 기법을 적용하여 선박 길이 정보를 추정하는 기술에 대해 소개한다.

• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.789-793
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• 2023

Evalution of counter drone systems is conducted in order to designate plausible countermeasues against possible drone threats, assess the level of safety of national major facilities and derive complementary measures for detected weakness. Recently drone threats by North Korea have heavily impacted ROK(Republic of Korea) people and it has been stronly stressed to build efficient counter drone system for make the society protected and secured against drone threats. The researchers has conducted field investigations for some of national major facilites. There is, however, no standardized evaluation checklist, so we have proposed an evaluation checklist for counter drone systems though thinking process of RMA(Revolution in Military Affairs). This paper is to introduce the evaluation checklist for properly diagnosing each counter drone system.