• Journal of Electrical Engineering and Technology
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• v.11 no.1
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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.

• Korean Security Journal
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• no.29
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• pp.279-300
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• 2011

Countries recognize seriousness and concern about aviation terrorism, try to stamp out of it but aviation terrorism has been increasing in the world. Airport security is completely up to the result of security screening for passengers, check-in baggages and cargo at the check point. To complete effectively human and physical screening at the airport, it is essential to secure modernized screening equipment and specialized security screener, and airport security supervisor to supervising them. In this study, A survey conducted to find out the effect on screening equipment operating factors of airport security supervisor's individual attitude. The results of the study are as follow First, the duty view of airport security supervisor meaningfully affect expertise of screening equipment operating factors, satisfaction, reliability, and education and training, national point of view meaningfullly doesn't affect screening equipment operating factors. Second, the working condition effects on the education and training, if the working condition is getting better, intent to change occupation is getting lower. Third, duty stress meaningfully effects on the intent to change occupation, now airport security supervisor works in poor condition. Therefore, airport security supervisor needs to be prude of protecting the airport from the terrorism and various attacks and various kinds of aviation security regulations and procedures and comply with operating standards and keep the life of the country and its people, and needs to change awareness. And It is nessasary for government or airport authority or airline to prepare countermeasure for the improvement of their labor conditions.

• Carbon letters
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• v.26
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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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• v.31 no.6
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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.

• Journal of Korean Society for Quality Management
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• v.49 no.2
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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.

• Convergence Security Journal
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• v.16 no.7
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• pp.69-75
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• 2016

The government is to prevent technology leakage in 2007, the Industrial Technology Protection Act was enacted and encouraging deployment of security equipment. in this study, corporate security equipment for the tried to determine the cause. In contrast to quantitative research, which is an existing research method, Barney G. Glaser & Anselm L. Strauss used a grounded theory as a kind of qualitative methodology in social science. As a result, it was found that the higher the government subsidy, the request from the representative or the client, the higher the efficiency through the prevention of technology leakage, the higher the sales increase, In the United States.

• Journal of Korean Society for Quality Management
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• v.49 no.1
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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.

• Journal of Korean Society for Quality Management
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• v.48 no.1
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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.

• Convergence Security Journal
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• v.24 no.1
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• pp.3-9
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• 2024

Currently, cyberattacks and security threats are constantly evolving, and organizations need quick and efficient security response methods. This paper proposes ways to strengthen internal network security by utilizing Unified Threat Management (UTM) equipment to improve network security and effectively manage and analyze the log data of the internal network collected through these equipment using Elastic Stack (Elasticsearch, Logstash, Kibana, hereinafter referred to as ELK Stack).

• Korean Security Journal
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• no.1
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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.