• 융합보안논문지
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• 제20권1호
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• pp.85-92
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• 2020

최근에 발생한 군사기밀 유출 사례 중에는 정보통신망을 이용한 내부정보 유출은 드물다. 그 이유는 군 업무 특성상 국방정보통신망은 자료 전송용 인터넷과 내부 업무용 인트라넷으로 구성되어 있는데 물리적으로 분리되어 있고, 인터넷망을 통해서 자료를 송·수신할 때는 까다로운 절차를 거치게 때문이다. 최근 군사기밀 유출 사례를 분석한 결과 대부분의 유출 경로는 비밀을 복사하여 넘겨주거나 스마트폰으로 촬영하여 전송하거나 기밀 내용을 기억한 후에 발설한 것이다. 그래서 정보통신망을 대상으로 한 군사기밀 유출 차단 또는 탐지하는 기술은 효과적이지 못하다. 본 연구에서는 유출 대상인 군사기밀이 아닌 유출 주체자인 내부자 행위에 중점을 두고 정보유출 방지 방안을 제안하고자 한다. 첫 번째는 군사기밀을 유출하는 행위를 차단하는 예방 대책이고 두 번째는 군사기밀 파일에 의심스러운 접근행위를 차단하는 방안이며, 마지막으로 내부자의 정보유출 행위를 탐지하는 방안이다.

• Journal of Cerebrovascular and Endovascular Neurosurgery
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• 제25권4호
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• pp.420-428
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• 2023

Objective: Intraprocedural rupture (IPR) is a fatal complication of endovascular coiling for cerebral aneurysms. We hypothesized that contrast leakage period may be related to poor clinical outcomes. This study aimed to retrospectively evaluate the relationship between clinical outcomes and contrast leakage period. Methods: Data from patients with cerebral aneurysms treated via endovascular coiling between January 2010 and October 2018 were retrospectively assessed. The enrolled patient's demographic data, the aneurysm related findings, endovascular treatment and IPR related findings, rescue treatment, and clinical outcome were analyzed. Results: In total, 2,859 cerebral aneurysms were treated using endovascular coiling during the study period, with IPR occurring in 18 (0.63 %). IPR occurred during initial frame coiling (n=4), coil packing (n=5), stent deployment (n=7), ballooning (n=1), and microcatheter removal after coiling (n=1). Tear sites included the dome (n=14) and neck (n=4). All IPRs were controlled and treated with coil packing, with or without stenting. Flow arrest of the proximal balloon was not observed. Temporary focal neurological deficits developed in two patients (11.1%). At clinical follow-up, 14 patients were classified as modified Rankin Scale (mRS) 0, three as mRS 2, and one as mRS 4. The mean contrast leakage period of IPR was 11.2 min (range: 1-31 min). Cerebral aneurysms with IPR were divided into late (n=9, mean time: 17.11 min) and early (n=9, mean time: 5.22 min) control groups based on the criteria of 10 min of contrast leakage period. No significant between-group differences regarding clinical outcomes were observed after IPR (p=1). Conclusions: In our series, all patients with IPR were controlled with further coil packing or stenting without proximal balloon occlusion within 31 min of contrast leakage. There was no difference in clinical outcomes when the long contrast leakage period group and short contrast leakage period group were compared.

• 산업경영시스템학회지
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• 제37권2호
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• pp.77-84
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• 2014

The purpose of this research is to identify and develop technology protection plans for small and medium-sized enterprises (SMEs) by analyzing past technology leakage patterns which were experienced by SMEs. We identified factors which affect the technology leakage, and analyzed patterns of the influences using a data mining algorithms. A decision tree analysis showed several significant factors which lead to technology leakage, so we conclude that preemptive actions must be put in place for prevention. We expect that this research will contribute to determining the priority of activities necessary to prevent technology leakage accidents in Korean SMEs. We expect that this research will help SMEs to determine the priority of preemptive actions necessary to prevent technology leakage accidents within their respective companies.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 하계학술대회 논문집
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• pp.88-91
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• 2001

Our knowledge about their long-term performance in an outdoor environment is still very limited. The electrical stress caused the surface of these insulators to become degradation. In order to evaluate leakage current patterns caused by surface aging on polymeric insulators, we utilized the combined aging test facility and leakage current monitoring system. And we get the continuous leakage current values from each sample. After completing the 3000h combined aging cycle test, leakage current measurement were conducted for these samples and carried out harmonics analysis for its data.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 춘계학술대회
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• pp.2162-2167
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• 2003

It is well-known that high anisotropic characteristic of turbulent flow field is dominant inside tip leakage vortex. This anisotropic nature of turbulence invalidates the use of the conventional isotropic eddy viscosity turbulence model based on the Boussinesq assumption. In this study, to check whether an anisotropic turbulence model is superior to the isotropic ones or not, the results obtained from steady-state Reynolds averaged Navier-Stokes simulations based on the RNG ${\kappa}-{\varepsilon}$ and the Reynolds stress model in two test cases, such as a linear compressor cascade and a forward-swept axial-flow fan, are compared with experimental data. Through the comparative study of turbulence models, it is clearly shown that the Reynolds stress model, which can express the production term and body-force term induced by system rotation without any modeling, should be used to predict the complex tip leakage flow, including the locus of tip leakage vortex center, quantitatively.

• 전자공학회논문지T
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• 제35T권1호
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• pp.29-32
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• 1998

실리콘 산화막에서 저레벨 누설전류를 조사하였다. 저레벨 누설전류는 전이요소와 직류요소로 구성되어 있다. 전이요소는 스트레스에 의해 두 계면트랩 가까이 발생된 트랩의 충방전에 의한 터널링으로 나타났으며 직류요소는 산화막을 통한 트랩 어시스트 터널링으로 나타났다 그리고 저레벨 누설전류는 산화막에서 발생된 트랩의 수에 비례하였다. 저레벨 누설전류는 트랩의 충방전 누설전류이며 비휘발성 소자의 데이터 유지능력에 영향을 주었다.

• 전기학회논문지
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• 제66권10호
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• pp.1445-1453
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• 2017

In this paper, we propose a fault detection model based on multi-layer neural network using data mining technique for faults due to boiler tube leakage in a thermal power plant. Major measurement data related to faults are analyzed using statistical methods. Based on the analysis results, the number of input data of the proposed fault detection model is simplified. Then, each input data is clustering with normal data and fault data by applying K-Means algorithm, which is one of the data mining techniques. fault data were trained by the neural network and tested fault detection for boiler tube leakage fault.

• 한국전자파학회논문지
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• 제14권6호
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• pp.616-624
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• 2003

상수도 누수로 인한 우리나라 수자원의 고갈 때문에 효율적으로 누수를 탐지할 수 있는 방법이 시급하다. 본 논문에서는 지하탐사 레이더(GPR) 기법을 이용하여 누수지점을 탐사하였다. 메탄올이 채워진 아크릴 상자로 누수가 일어난 영역을 구현한 후, 본 실험실에 구축된 GPR 시스템을 사용하여 scale-down 실험을 수행하였다. 본 GPR실험의 타당성은 측정결과가 동일한 상황에서의 FDTD 계산 결과와 거의 일치함을 보임으로써 확인하였다. 누수 분포에 따른 B-scan 영상들을 제시함으로써 GPR 시스템의 누수탐지 가능성을 살펴보았다.

• 자원ㆍ환경경제연구
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• 제21권3호
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• pp.519-542
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• 2012

본 논문은 EU ETS 기간 전과 후를 비교함으로써 탄소누출이 일어났는가를 실증적으로 분석하였다. 해외직접투자를 탄소누출의 지표로 활용하여 EU 11개국을 대상으로 한 1995년부터 2009년까지의 패널데이터를 이용하여 생산비용과 환경비용과의 패널 분석을 하였다. 시장 추구형 해외직접효과도 아울러 고려하여 해외시장잠재력도 아울러 고려하였다. 본 분석에 의하면 제조업을 대상으로 한 일부모형에서 탄소누출이 확인되었다. 하지만 다양한 모형에서 일관되게 확인되지 않아서 EU 배출권거래제를 전후하여 탄소누출이 뚜렷하게 일어났다고 단정하기는 힘들다. 비교적 데이터의 시계열이 짧음에도 불구하고 일부모형에서 탄소누출이 검증되었다는 사실을 볼 때 향후 국내 배출권거래제 도입시 우리나라도 탄소누출의 가능성을 염두에 두고 배출권거래제 제도를 설계해야 할 것이다.

• 지식경영연구
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• 제20권4호
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• pp.75-97
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• 2019

In the rapidly changing business environment, knowledge has been recognized as a core asset for sustaining an organization's competitive advantage. In addition, knowledge sharing is one of the key elements of knowledge management, emphasizing external knowledge sharing beyond initial internal knowledge sharing. However, while knowledge management research emphasizes knowledge sharing, which is a positive aspect, research on preventing knowledge leakage that can have negative consequences is relatively lacking. Companies have tried to minimize the negative effects of knowledge management but many knowledge leakage accidents are still occurring. Therefore, this study aims to examine the effects of external factors based on deterrence theory and internal factors based on self-determination theory on knowledge leakage intention focusing on tacit knowledge. The results of the empirical analysis of 100 data sets collected through a scenario-based survey show that certainty of sanctions, social disapproval, and competence are found to have a significant effect on reducing tacit knowledge leakage intention. Furthermore, informal sanctions have a greater impact on tacit knowledge leakage intention than formal sanctions and external factors have a greater effect on tacit knowledge leakage intention than internal factors.