• Journal of Electrical Engineering and Technology
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• 제11권1호
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• pp.135-142
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• 2016

Generally, closed slots are adopted to reduce the water friction loss in both the stator and the rotor of water filling submersible motor due to the special environment of operation. One of the obvious differences between the traditional induction motors and water filling submersible motors is that the submersible motors only need relatively smaller starting torque. This paper aims to analyze the slot leakage reactance of water filling submersible motor during starting transient operation. An improved analytical method which considered the magnetic saturation of the slot bridge and the skin effect of rotor bars is proposed. The slot permeance factor which has a direct impact on the slot leakage reactance is calculated. Then finite element models with different stator slot types are constructed and search coils are introduced to measure the slot flux linkage. Moreover, the starting performances of the models with two typical stator slots are compared and the flux leakage characteristics are obtained. Finally, the results obtained by finite element method are very close to the results obtained by analytical method.

• 한국IT서비스학회지
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• 제19권4호
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• pp.13-30
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• 2020

Not only does it cause damage to individuals and businesses due to the occurrence of large-scale personal information leakage accidents, but it also causes many problems socially. Companies are embodying efforts to deal with the threat of personal information leakage. However, it is difficult to obtain detailed information related to personal information leakage accidents, so there are limitations to research activities related to leakage accidents. This study collects information on personal information leakage incidents reported through the media for 15 years from 2005 to 2019, and analyzes how the personal information leakage incidents occurring to companies are related to the characteristics of the company. Through the research results, it is possible to grasp the general characteristics of personal information leakage accidents, and it may be helpful in decision making for prevention and response to personal information leakage accidents.

• 산업기술연구
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• 제34권
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• pp.61-66
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• 2014

Recently, Because the consumption of electricity is increased, having stable electricity supply and diagnosis of the power device is important. In this paper, I propose a diagnostic techniques of the leakage current for switchgear based on LabVIEW NI's. Using the data obtained from the leakage current sensor installed in switchgear panels, in performed continuously diagnosis, notifications and warnings can be the administrator immediately results. It is expected accordingly, the administrator will be able to take prompt action. Using the virtual switchgear with a PXI NI's, war tested the proposed techniques.

• 산업기술연구
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• 제18권
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• pp.453-460
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• 1998

The purpose of this study was to analyze their status of underground storage tank(UST) facilities and level of soil contamination, and to establish its management criteria. DB program was developed to analyze the correlation between specific characteristic of UST and level of soil contamination. For a suitable management of UST, leakage monitoring and inspection method of UST was investigated. Inspection period was established based on the leakage rate. The most dominant factor for leakage seemed to be caused by the corrosion. Therefore, main factor, construction method and installation year of UST, and corrosion protection system were suggested for optimal protection of UST. Considering the present management status of UST in Korea, inspection and management criteria of UST should be accomplished in term of contamination protection of leakage, and flexible regulation act should be introduced for each specific site.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권11호
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• pp.4662-4679
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• 2015

Currently, the leakage of internal information has emerged as one of the most significant security concerns in enterprise computing environments. Especially, damage due to internal information leakage by insiders is more serious than that by outsiders because insiders have considerable knowledge of the system's identification and password (ID&P/W), the security system, and the main location of sensitive data. Therefore, many security companies are developing internal data leakage prevention techniques such as data leakage protection (DLP), digital right management (DRM), and system access control, etc. However, these techniques cannot effectively block the leakage of internal information by insiders who have a legitimate access authorization. The security system does not easily detect cases which a legitimate insider changes, deletes, and leaks data stored on the server. Therefore, we focused on the insider as the detection target to address this security weakness. In other words, we switched the detection target from objects (internal information) to subjects (insiders). We concentrated on biometrics signals change when an insider conducts abnormal behavior. When insiders attempt to leak internal information, they appear to display abnormal emotional conditions due to tension, agitation, and anxiety, etc. These conditions can be detected by the changes of biometrics signals such as pulse, temperature, and skin conductivity, etc. We carried out experiments in two ways in order to verify the effectiveness of the emotional recognition technology based on biometrics signals. We analyzed the possibility of internal information leakage detection using an emotional recognition technology based on biometrics signals through experiments.

• 융합보안논문지
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• 제22권3호
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• pp.41-55
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• 2022

기술보호의 중요성이 날로 강조됨에 따라 기술보호를 위한 다양한 보호조치들이 수행되고 있으나 기술유출을 위한 시도가 끊이지 않고 있으며 이에 대한 대안으로 기술유출 범죄에 대해 보다 강력한 처벌이 사회적으로 요구되고 있는 실정이다. 이러한 사회적 요구에 맞춰 그간 꾸준히 처벌 기준이 상향되어 왔으며 현재도 추가적인 강화 내용을 담은 입법안들이 국회에 계류 중인 상황이다. 하지만 범죄에 대한 억제력을 실질적으로 제고하기 위해서는 처벌 기준을 강화하는 것만으로는 충분하지 않으며 처벌의 확실성이 높아졌을 때야 비로소 그 효과를 온전히 발휘될 수 있다. 따라서 본 논문에서는 처벌 자체의 강화적인 부분보다는 현 제도 하에서 처벌의 확실성을 높이기 위한 방안을 모색하는데 초점을 맞췄으며 이를 위해 기술유출 형사사건 중 무죄 사건을 중심으로 사례 및 원인을 유형별로 분석함으로써 기술유출 형사사건에서의 무죄율이 일반 형사사건 대비 높은 이유를 도출해보고 이를 토대로 부당한 무죄사건을 줄이기 위한 개선 고려사항들을 논의하고자 하였다.

• 한국전자거래학회지
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• 제20권3호
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• pp.1-10
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• 2015

본 연구는 중소기업청에서 실시한 2013년 중소기업 기술보호 역량 및 수준조사를 바탕으로 중소기업의 기술유출 경험유무와 기술보호 요인을 분석하여 정부지원을 통한 기술유출방지 효과를 극대화 할 수 있는 핵심 요인을 도출하고자 한다. 중소기업 기술보호 역량 및 수준조사 대상 1,561개 기업 중 대기업 43개를 제외한 1,518개 중소기업 중 기술유출 중소기업 155개와 미유출 중소기업 1,363개 중소기업에 대해 기술보호 요인을 로지스틱 회귀분석 하였다. 기술유출 관련 요인을 분석한 결과, 출입자 통제 시스템 운영, 보안감사 실시여부, 임직원 부재 시 보안활동, 중요자료 보호대책 마련이 핵심요인으로 도출되었으며, 이들 사항에 대해 정부차원에서 집중적인 지원이 이루어진다면 기술보호 효과가 극대화 될 수 있을 것으로 사료된다.

• 한국안전학회지
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• 제33권1호
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• pp.35-40
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• 2018

This research aimed to develop an leakage detector of analyzing the electric potential generated from the electric leakage of electric equipment of the fountain. To accomplish this goal, the potential gradient was analyzed against path 1 ~ path 4; this was done by taking the lighting of a fountain as the electric leakage point based on code analyses in Korea and other countries. Lighting 1 was taken as the electric leakage point, and the earthing point was set against lightings(2~3). It appeared that the allowable touch voltage against the 1 type(under 2.5 V) exceeded 60.0%. Therefore, the lighting of fountain turned out to be the most dangerous point, and electric shock could be formed by the electric leakage of electric equipment in underwater as well as by the lighting. An leakage detector was developed based on this risk; this detector is capable of analyzing the electric potential of a electric equipments of the fountain in underwater. Then, a verification test was carried out. This leakage detector can be used to measure electric potential in various submerged areas such as swimming pools, flooded spaces, and fountains.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2003년도 봄 학술발표회 논문집
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• pp.197-202
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• 2003

The leakage quantity through concrete facing of Concrete Face Rockfill Dam(CFRD) is very small due to its low permeability of intact concrete. Even though the concrete facing is well designed and constructed, fine cracks can be generated due to effects of thermal and drying shrinkage. Therefore, it can be said that the leakage from the CFRD is subjected to not permeability of intact concrete but poor joints, cracks and foundation rocks. The Safety of a dam on leakage was evaluated based on the comparison between apparent permeability estimated and leakage quantity measured. The above method can be concluded to give a good direction for the evaluation of safety on CFRD in maintenance aspects as design and construction technology is improved with the accumulation of leakage data.

• 한국산업정보학회논문지
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• 제16권5호
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• pp.1-8
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• 2011

This paper proposes a new input pattern generator for minimal leakage power in the nanometer CMOS technology considering all the leakage current components (sub-threshold leakage, gate tunneling leakage, band-to-band tunneling leakage). Using the accurate macro-model, a heuristic algorithm is developed to generate a input pattern for the minimum leakage. The algorithm applies to ISCAS85 benchmark circuits, and the results are compared with the results of Hspice. The simulation result shows that our method's accuracy is within a 5% difference of the Hspice simulation results. In addition, the simulation time of our method is far faster than that of the Hspice simulation.