• Journal of Electrical Engineering and Technology
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• 제11권1호
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• pp.192-199
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• 2016

With changes in insulated defects, the environment, and so on, new partial discharge (PD) data are highly different from the original samples. It leads to a decrease in on-line recognition rate. The UHF signal and pulse current signal of four kinds of typical artificial defect models in gas insulated switchgear (GIS) are obtained simultaneously by experiment. The relationship map of ultra-high frequency (UHF) cumulative energy and its corresponding apparent discharge of four kinds of typical artificial defect models are plotted. UHF cumulative energy and its corresponding apparent discharge are used as inputs. The support vector machine (SVM) incremental method is constructed. Examples show that the PD SVM incremental method based on simulated annealing (SA) effectively speeds up the data update rate and improves the adaptability of the classifier compared with the original method, in that the total sample is constituted by the old and new data. The PD SVM incremental method is a better pattern recognition technology for PD on-line monitoring.

• 시큐리티연구
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• 제29호
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• pp.279-300
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• 2011

세계 각국이 항공테러에 대한 심각성과 우려를 공동으로 인식하고 차단에 적극 노력을 기울이고 있지만, 세계적으로 항공테러는 점점 증가하는 추세에 있다. 공항보안의 핵심은 승객과 휴대 및 위탁수하물, 화물이 검색장비를 통과하는 지점에서 이루어지는 결과에 따라 승패가 달려 있다. 공항에서 인적 및 물적 검색이 효과적으로 이루어지기 위해서는 현대화된 검색장비와 전문화된 보안요원의 확보, 그리고 이를 감독하는 공항보안감독관이 필수적이다. 본 연구에서는 공항보안감독관의 개인태도가 검색장비 운영요인에 미치는 영향을 규명 하기위한 설문조사를 하였다. 연구결과 첫째, 공항보안감독관의 직무관이 검색장비 운영요인의 전문성, 만족도, 신뢰성 및 교육훈련에 유의미한 영향을 미치는 것으로 나타났고, 국가관은 검색장비 운영요소에 모두 유의미한 영향을 미치지 않는 것으로 나타났다. 둘째, 근무환경은 교육훈련에 유의미한 영향을 미치고 이직의도에는 부의 인과관계가 있어 근무환경이 좋으면 이직이 낮아지는 것으로 나타났다. 셋째, 직무스트레스는 이직의도에 높은 유의미한 영향을 미치는 것으로 나타나, 현재 공항보안감독관이 열악한 환경에서 근무하고 있음을 알 수 있다. 따라서 공항보안감독관은 공항을 각종 테러 등 위해로부터 방호하기 위해서는 항공보안 각종 규정과 절차서 및 운영기준 등을 준수하고, 국가와 국민의 생명을 지킨다는 긍지와 자부심과 함께 인식전환이 필요하며, 올바른 처우개선을 위한 종합대책이 필요할 것으로 판단된다.

• Carbon letters
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• 제26권
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• pp.61-65
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• 2018

Comprehensive calculations of the Rh decoration effect on zigzag CNTs with n ranging from 7 to 12 were conducted in this work to understand the effect of Rh doping on geometric structures and electronic behaviors upon metallic and semiconducting CNTs. The obtained results indicated that Rh dopant not only contributes to the deformation of C-C bonds on the sidewall of CNTs, but also transforms the electron distribution of related complexes, thereby leading to a remarkable increase of the conductivity of pure CNTs given the emerged novel state within the energy gap for metallic CNTs and the narrowed energy gap for semiconducting CNTs. Our calculations will be meaningful for exploiting novel CNT-based materials with better sensitivity to electrons and higher electrical conductivity compared with pure CNTs.

• ETRI Journal
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• 제31권6호
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• pp.806-808
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• 2009

A new computationally efficient algorithm-based propagator method for two-dimensional (2-D) direction-of-arrival (DOA) estimation is proposed, which uses two parallel uniform linear arrays. The algorithm takes advantage of the special structure of the array which enables 2-D DOA estimation without pair matching. Simulation results show that the proposed algorithm achieves very accurate estimation at a computational cost 4 dB lower than that of standard methods.

• 품질경영학회지
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• 제49권2호
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• pp.113-125
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• 2021

Purpose: This study focused on reality and quality improvement of aviation security equipment performance certification system. Methods: For this propose, we analyzed aviation security equipment performance certification system related legislations. Using analyzed data, we suggested advancement plan of aviation security equipment performance certification system. Results: In results, South Korea has been implementing aviation security performance certification system since October 2018. Parts for improvement of system are mutual certification with major countries that operate aviation security equipment performance certification systems, the spread of the defense industry's system, development of similar substances for handling explosives, and introduction of preliminary inspections. Conclusion: The research result could be used as a basic data for upgrading Korea's aviation security performance certification system.

• 융합보안논문지
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• 제16권7호
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• pp.69-75
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• 2016

기술유출 방지를 위해 정부에서는 2007년도에 산업기술방지법을 제정하고 융합보안장비 구축을 권장하고 있다. 이에 기업에서 융합보안장비를 구축하는 원인을 파악하고자 하였다. 이를 위해 기존의 조사방식인 양적연구(quantitative research)와 달리 심층면담을 통해 원인을 찾아가는 질적연구(qualitative research) 중 바니 글래이저(Barney G. Glaser)와 안젤름 스트라우스(Anselm L. Strauss)가 사회과학의 질적방법론의 한 종류로 사용한 근거이론(grounded theory)을 사용하였다. 이에 정부로부터 융합보안장비 구축비를 지원받은 기업을 대상으로 조사한 결과 정부지원금이 높을수록, 대표자나 고객사의 요청이 있을 경우, 기술유출방지를 통해 업무효율성이 높을수록, 매출증대가 높을수록 융합보안장비를 구축하는 것으로 조사되었다.

• 품질경영학회지
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• 제49권1호
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• pp.47-60
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• 2021

Purpose: This study proposes methods and procedures for evaluating imaging security systems quality of cabinet x-ray screening system to enhance performance certification technology. Also, conducted a comparative analysis of the literature of test-kit for imaging security quality evaluation. Methods: Comparative analysis of the test-kits and related documents for image quality assessment of cabinet x-ray screening equipment. This allows assessment items were selected and the methods for each assessment item were proposed. In addition, the configuration method of the assessment team was established by applying the technology readiness assessment(TRA). Results: Four of the assessment items were selected when estimate image quality by a comparative analysis of literature. For each assessment item, the evaluation method and minimum level of availability were determined. Finally, this paper proposes an imaging quality assessment of cabinet X-ray imaging security systems. Conclusion: Development of imaging security systems evaluation procedures for cabinet X-ray screening systems can be help improve performance certification of aviation security equipment.

• 품질경영학회지
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• 제48권1호
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• pp.187-199
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• 2020

Purpose: This study suggests how to upgrade performance certification technology. Current performance certification of aviation security equipment and the requirements thereof were analyzed. Methods: The performance certification of aviation security equipment worldwide and identified issues with the domestic certification system were compared. The government must upgrade certification in terms of technical standards, the assessment methodology used, and the operating system. Results: Three principal conclusions were drawn. First, certification requirements must be based on a review of the technical literature and real-world experience. Second, development priorities must be set by reference to assessment techniques. Third, both research on the certification system and improvements thereof are essential. Conclusion: Certification of aviation security equipment performance requires gradual upgrading.

• 융합보안논문지
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• 제24권1호
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• pp.3-9
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• 2024

현재 사이버 공격과 보안 위협은 지속적으로 진화하고 있으며, 조직은 신속하고 효율적인 보안 대응 방법을 필요로 한다. 본 논문은 Unified Threat Management (UTM) 장비를 활용하여 네트워크 보안을 향상시키고, 이러한 장비를 통해 수집되는 내부망의 로그 데이터를 Elastic Stack (Elasticsearch, Logstash, Kibana, 이하 ELK Stack)을 활용하여 효과적으로 관리하고 분석하는 내부망 보안 강화방안을 제안하고자 한다.

• 시큐리티연구
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• 제1호
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• pp.73-98
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• 1997

The thesis suggests the proper ftaining methods and their future direction in order for bodyguards to have a general idea of basic skills of escort and develop them. What is meant by basic skills are the basic abilities of bodyguards for escort indluding physical strength, martial arts, and manipulation of equipment. The equipment in the thesis is confined to guns. The following are the requircments for the training of basic skills; 1, A bodyguard should be careful not to expose any equipment he uses his basic skills so that he does not make others feel uncomfortable. 2. He should be trained to give the safety of the person(s) escorted the first priority. 3. He should have the ability to take care of at least one attacker. 4. He should be trained to be able to evaluate the trend of attacks and keep up with it. Training fo basic skills are divided into three parts-physical training, martial arts and use of equipment. Each part is divided into basic training, applied training, and professional training, which again are integrated in one master training program. Especially, development of equipment which helps to take care of attacker(s) quickly without casualties and learning to use the equipment efficiently will accelerate the improvement of basic skills. The author of the thesis worked for Presidential Security Service for fourteen years and suggests the most efficient, protection-oriented way of training based on his experience.