• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2013년도 춘계학술대회
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• pp.429-431
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• 2013

선박 교통의 안전을 확보하고 항만의 효율성의 제고, 해양사고예방 및 해양환경 보호의 역할 기능으로 오늘날 해상교통관제의 중요성이 증대되고 있는 실정이다. 하지만 해상교통관제 운영의 법적근거가 미흡하여 적극적 체계적 관제 시행이 어려운 것이 현실이다. 이러한 해상교통관제 제도 선진화에 따라 관련 규정의 재정비는 필연적인 것으로 보인다. 따라서 본 연구는 현재 우리 나라 관제대상 선박의 적절성을 검토하고 나아가 관제대상 선박 적정 규정에 관한 지향점을 제시하기 위한 기초 연구로 삼고자 한다. 전 세계 27개국 124개 지역을 대상으로 조사한 관제대상 선박기준을 조사하여 우리나라 각 지방해양항만청의 관제대상 선박기준과 비교 분석을 통하여 적절성을 검토를 하고자 한다.

• The Korean Journal of Physiology and Pharmacology
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• 제16권6호
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• pp.447-453
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• 2012

TLR6 forms a heterodimer with TLR2 and TLR4. While proinflammatory roles of TLR2 and TLR4 are well documented, the role of TLR6 in inflammation is poorly understood. In order to understand mechanisms of action of TLR6 in inflammatory responses, we investigated the effects of FSL-1, the TLR6 ligand, on expression of chemokine CCL2 and cytokine IL-$1{\beta}$ and determined cellular factors involved in FSL-1-mediated expression of CCL2 and IL-$1{\beta}$ in mononuclear cells. Exposure of human monocytic leukemia THP-1 cells to FSL-1 resulted not only in enhanced secretion of CCL2 and IL-$1{\beta}$, but also profound induction of their gene transcripts. Expression of CCL2 was abrogated by treatment with OxPAPC, a TLR-2/4 inhibitor, while treatment with OxPAPC resulted in partially inhibited expression of IL-$1{\beta}$. Treatment with FSL-1 resulted in enhanced phosphorylation of Akt and mitogen-activated protein kinases and activation of protein kinase C. Treatment with pharmacological inhibitors, including SB202190, SP6001250, U0126, Akt inhibitor IV, LY294002, GF109203X, and RO318220 resulted in significantly attenuated FSL-1-mediated upregulation of CCL2 and IL-$1{\beta}$. Our results indicate that activation of TLR6 will trigger inflammatory responses by upregulating expression of CCL2 and IL-$1{\beta}$ via TLR-2/4, protein kinase C, PI3K-Akt, and mitogen-activated protein kinases.

• 한국재난정보학회 논문집
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• 제8권4호
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• pp.376-383
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• 2012

본 연구의 목적은 민방위 사태 발발시 준비 방안의 하나로서 비상생활지원 키트를 개발하여 국민의 안전과 안녕을 확보할 수 있는 기초 준비 방안을 모색하는 것이다. 민방위 대피소에서 짧게는 2시간부터 길게는 6일 정도를 생활하는 것을 감안하면 시설이용자들의 기본적인 생존권을 위해 비상생활지원용 식량 및 기타 물품이 필요하다. 1인당 3일 최소 비상생활지원키트는 개인용 무게는 4.85kg, 국가 및 지자체(정부)는 2.65kg을 분담하게 하고 그 구성은 총 8개 분류 26개 항목으로 식품, 피복, 화생방용품, 방한용품, 개인위생용품, 의약품, 공구, 통신용품 등으로 구성한다.

• 한국정보통신학회논문지
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• 제20권11호
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• pp.2039-2044
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• 2016

소셜 카지노 게임은 현재 국내에서 허용되지는 않지만 향후 사회관계망을 기반으로 발전할 소셜웹보드 게임에 대한 정책적 대안을 마련하기 위하여 필요한 안전장치가 무엇인지 살펴보는 것이 본 연구의 목적이다. 이를 위하여 세계 선진 각국에서 시행하는 책임도박시스템 특히 미국 뉴저지법에 저촉을 받는 책임게임시스템을 고찰하였다. 이러한 책임게임시스템이 현재의 웹보드 게임과 향후 생성될 소셜 카지노 게임에 적용할 법 제도 마련을 위한 사전 작업으로서 이용자보호모델을 게임전문가들을 중심으로 수립하였다. 그 결과 4가지 과몰입 위험군을 식별 할 수 있는 판단 기준과 각각의 위험군에 대한 단계별 조치방법을 마련하였다. 이러한 이용자보호방안은 현재 웹보드 시행령의 문제점을 보완하고 향후 소셜카지노게임을 위한 법 제도적인 도구를 마련하는 데 도움을 줄 것으로 판단한다.

• 패션비즈니스
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• 제19권3호
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• pp.43-58
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• 2015

Compulsive hoarding becomes a problem when the spaces hoarded items are stored in become unusable due to clutter, health, or safety issues. Our research purpose was to document relationships between two non-normative consumer behaviors (compulsive hoarding, compulsive buying tendency) and two shopping-related variables: hedonic shopping motives and emotional attachment to possessions with everyday consumers. As hedonic shopping motives have been related to compulsive buying, we predicted these motives (e.g., adventure, gratification, role, value, social, and idea) are related to compulsive buying. We also examined the relationship between compulsive buying and compulsive hoarding tendency and whether emotional attachment to possessions moderated this relationship. Participants were 280 undergraduate and graduate students attending a Midwestern university in the U.S. Regression analysis revealed the enhancing emotion motive (a combined motive of adventure and gratification) positively influenced compulsive buying whereas the value motive negatively influenced compulsive buying. All other hedonic shopping motives were non-significant. Participants who tended to buy compulsively were likely to hoard compulsively. This relationship, however, was moderated by participants' emotional attachment to possessions. Participants with high emotional attachment to possessions showed a higher level of hoarding behavior than those with low emotional attachment to possessions. However, the increase in hoarding tendency among participants with low emotional attachment to possessions was larger between those who were low in compulsive buying and those who were high in compulsive buying than the increase between these two groups among participants with high emotional attachment to possessions.

• 한국산업보건학회지
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• 제29권3호
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• pp.336-342
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• 2019

Introduction: An unexpected death was reported in a beginner immediately after starting the work at a plating factory. After the incident, air sampling was performed using a simulation of the situation as it had been at the time. Methods: To evaluate the airborne concentration of hydrogen cyanide, a total of six samples were collected: one personal sample, three area samples, and two background samples (office and outdoors). Hydrogen cyanide measurement was performed according to the standard sampling protocol recommended by the U.S. NIOSH (National Institute of Occupational Safety and Health). Results: The highest concentration of hydrogen cyanide was 0.938 ppm measured in a sample collected from the plating bath area with local exhaust ventilation. This value was approximately 20% of the ceiling occupational exposure limit. The personal sample showed a concentration of 0.135 ppm. Samples collected near the bath in which the incident occurred and a dehydrator showed hydrogen cyanide concentrations of 0.236 ppm and 0.101 ppm, respectively. Hydrogen cyanide was not detected in the background samples (office and outdoors). Conclusions: It is necessary to use proper ventilation systems and respirators in plating factories to prevent acute poisoning. Furthermore, it is important to educate and train new workers dealing with toxic substances.

• 한국차세대컴퓨팅학회논문지
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• 제15권6호
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• pp.7-14
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• 2019

감시 영상에서 군중 행동의 자동 모니터링 및 감지는 보안, 안전 및 자산 보호와 같은 방대한 응용 프로그램으로 인해 컴퓨터 비전 분야에서 중요한 관심을 받고 있다. 또한 연구 커뮤니티에서 군중 분석 분야가 점차 증가하고 있다. 이를 위해서는 군중들의 행동을 감지하고 분석하는 것이 매우 필요하다. 본 논문에서는 스마트 시티에 설치된 감시 카메라의 비정상적인 활동을 감지하는 딥러닝 기반 방법을 제안하였다. 미세 조정된 VGG-16모델은 트레이닝된 공개적으로 사용 가능한 벤치마크 군중 데이터 셋을 실시간 스트리밍으로 테스트한다. CCTV카메라는 비디오 스트림을 캡쳐하는데, 비정상적인 활동이 감지되면 경보가 발생하여 추가 손실 전에 즉각적인 조치가 이루어지도록 가장 가까운 경찰서로 전송된다. 우리는 제안된 방법이 기존의 첨단 기술 보다 성능이 뛰어남을 실험으로 입증하였다.

• Corrosion Science and Technology
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• 제17권6호
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• pp.279-286
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• 2018

Austenitic stainless steels used in nuclear power plants mainly use pipes made of seamless pipes, which depend on imports. The manufacturing process and high cost are some of the problems associated with seamless pipes. Therefore, in this study, the corrosion characteristics of the seamless pipe and the SAW pipe were assessed to determine the safety and reliability of the SAW pipe in a bid to replace the seamless pipe. Microstructure was analyzed using an optical microscope and the degree of hardness was measured using a Rockwell B scale. Intergranular corrosion resistance was evaluated by ASTM A262 Practice A, C, and E methods. The degree of sensitization was determined using a DL-EPR test. Anodic polarization test was performed in deaerated 1% NaCl solution at $30^{\circ}C$ and the U-bend method was used to evaluate the SCC resistance in 0.01 M $Na_2S_4O_6$ at $340^{\circ}C$ and 40% NaOH solution at $290^{\circ}C$. Weld metal of the SAW pipe specimen showed relatively high degree of sensitization and intergranular corrosion rate. However, annealing to SAW pipes improved the corrosion properties in comparison to that of the seamless pipe.

• 한국압력기기공학회 논문집
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• 제14권2호
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• pp.1-10
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• 2018

Structures, systems and components of nuclear power plants should be able to maintain safety even in the event of design-basis accidents such as high-energy line breaks. The high-pressure steam jet ejected from the broken pipe may cause damage to the adjacent structures. The ANSI/ANS 58.2 code has been adopted as a technical standard for evaluating the jet impingement load. Recently, the U.S. NRC pointed out the non-conservativeness of the ANSI/ANS 58.2, because it does not take into account the blast wave effect, dynamic behavior of the jet, and oversimplifies the shape and load characteristics of the supersonic steam jet. Therefore, it is necessary to improve the evaluation method for the high-energy line break accident. In order to evaluate the behavior of supersonic steam jet, an appropriate numerical analysis technique considering compressible flow effect is needed. In this study, numerical analysis methodology for evaluating supersonic jet impingement load was developed and verified. In addition, the conservativeness of the ANSI/ANS 58.2 model was investigated using the numerical analysis methodology. It is estimated that the ANSI jet model does not sufficiently reflect the physical behavior of under-expanded supersonic steam jet and evaluates the jet impingement load lower than CFD analysis result at certain positions.

• 시스템엔지니어링학술지
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• 제14권2호
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• pp.73-82
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• 2018

In this work, a hardware based cryptographic module for the cyber security of nuclear power plant is developed using a system engineering approach. Nuclear power plants are isolated from the Internet, but as shown in the case of Iran, Man-in-the-middle attacks (MITM) could be a threat to the safety of the nuclear facilities. This FPGA-based module does not have an operating system and it provides protection as a firewall and mitigates the cyber threats. The encryption equipment consists of an encryption module, a decryption module, and interfaces for communication between modules and systems. The Advanced Encryption Standard (AES)-128, which is formally approved as top level by U.S. National Security Agency for cryptographic algorithms, is adopted. The development of the cyber security module is implemented in two main phases: reverse engineering and re-engineering. In the reverse engineering phase, the cyber security plan and system requirements are analyzed, and the AES algorithm is decomposed into functional units. In the re-engineering phase, we model the logical architecture using Vitech CORE9 software and simulate it with the Enhanced Functional Flow Block Diagram (EFFBD), which confirms the performance improvements of the hardware-based cryptographic module as compared to software based cryptography. Following this, the Hardware description language (HDL) code is developed and tested to verify the integrity of the code. Then, the developed code is implemented on the FPGA and connected to the personal computer through Recommended Standard (RS)-232 communication to perform validation of the developed component. For the future work, the developed FPGA based encryption equipment will be verified and validated in its expected operating environment by connecting it to the Advanced power reactor (APR)-1400 simulator.