• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.582-584
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• 2012

울산 VTS에서는 2010년 하반기 ATLAS사(社)의 VTS 시스템에 통항분석 프로그램을 도입하였다. 그동안 울산 VTS에서 이 통항분석 프로그램을 활용하여 사용하여 본 경험을 토대로 동 프로그램의 장 단점을 분석하고 실제 업무에 사용되었던 통항분석패턴을 소개하였다. 이와 함께 동 프로그램을 사용하면서 사용자 입장에서 느낀 개선방향에 대하여 정리하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.513-515
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• 2012

일본의 항만 및 연안에서는 대한민국의 연안 항만 VTS처럼 선박항행지원을 위하여 항외 및 항내에 따라 각 영역별로 VTS 관할구역이 구분되어 있다. 이 중 항내를 관할하는 일본 Port Radio의 업무 내용에 대하여 고찰하고, 이전과 다른 일본 Port Radio의 역할 변화(수역이용 조정 업무, 항공국과의 연대 등)에 따른 발전방향에 대하여 살펴본다. 아울러 일본 Port Radio가 현재 직면하고 있는 운용 요원의 교육훈련과 VTS 의사결정 지원 시스템 도입의 필요성에 대하여 살펴봄으로써 일본 주요 항만의 VTS가 보다 안전하고 효율적으로 운영되는 것을 목적으로 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.46-48
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• 2007

VTS가 국제적으로 성공하기 위해서는 유엔해양법협약의 기본정신에 따라 IMO차원의 국제협약이 마련되어야 하며, 국내 이행입법이 도입되어 법적 실효성을 확보해야 한다. 또한 주변국가간 협력체제를 통한 광역 VTS의 도입으로 연안국의 관할권을 벗어나는 수역에서의 해양사고발생을 방지하고(사전 예방), 사고선박에 대한 해난구조체계(사후구제)를 효과적으로 운영하기 위한 국제법적 제도가 도입되어야 하므로, 이에 대한 기초검토로써의 의미를 가진다.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.601-604
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• 2007

In this paper, we report the wall voltage transfer characteristic between sustain electrodes according to the address bias voltage in a 3-electrodes surface discharge type ac PDP by the VT close curve measurement technique. The result shows the change of wall voltage according to the gap voltage variation depends on the address bias voltage.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.423-425
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• 2013

정박선의 증가로 인해 VTS에서는 정박지를 선박에게 권고함에 있어서, 보다 효율적인 방법을 요하게 되었다. 정박지라는 한정된 범위 안에서 가능한 한 다수의 선박을 안전하게 투묘시킬 수 있는 방법을 모색하여 보았다. 각 항구의 정박지 권고 방식을 비교해보고, 포항항을 중심으로 격자형 정박지 권고 방식을 교신의 간소화와 함께 효율을 높일 수 있는 하나의 대안으로 제시하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.395-397
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• 2013

본 연구는 최근 국제적으로 VTS를 통한 해상안전관리와 해운활동 활성화의 중요성이 더욱 부각됨에 따라 이를 위하여 어떻게 하면 VTS가 항만이용자에게 가장 효율적으로 서비스를 제공할 수 있는가를 살펴본 것이다. 그 중에서도 관제사의 역량강화를 위한 여러 방법을 제시하였으며 이는 우리 관제사가 항상 염두해 두어야 할 사항이다. 이를 요약하면 관제사의 실무운항특성이해, 법규이행 감독, 효율적 교신 노력, 항만지리에 정통, 항만이용자간 신뢰구축, 정보종합 판단능력 배양, 국제동향 파악 등이다.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.4
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• pp.239-245
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• 2013

The data retention characteristics depending on neighbor cell's threshold voltage (Vt) in a multilevel NAND flash memory is studied. It is found that a Vt shift (${\Delta}Vt$) of the noted cell during a thermal retention test is increased as the number of erase-state (lowest Vt state) cells surrounding the noted cell increases. It is because a charge loss from a floating gate is originated from not only intrinsic mechanism but also lateral electric field between the neighboring cells. From the electric field simulation, we can find that the electric field is increased and it results in the increased charge loss as the device is scaled down.

• Journal of the Korean Society of Food Science and Nutrition
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• v.23 no.3
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• pp.380-386
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• 1994

The behavior of glycogen and histological changes of hepatic tissues in the liver of rats, aged 6 to 7 weeks, fed 18% casein diet under control, gramoxone and gramoxone + vitamin C(Vt. C) diets has been investigated in a comined histropathological and histochemical studies. Cloudy swelling and fat changes of hepatic cells were observed in the gramoxone group with the duration of feeding time. Fat changes of hepatic cells were observed more obviously than cloudy welling, especially in the hepatic cells of periportal area. The number of Kupffer's cells increased signifciantly in the gramoxone group fed for 4weeks. The cloudy swelling and fat changes decreased obviously in the gramxone + Vt. C group. Glycogen content of heaptic cells tended to increase slightly in the gramoxone group as compared with the control group . moreover, glycogen depositons were higher in the hepatic cells where fat changes were obvious. It seems to be that Vt.C alleviating effects on the gramoxone toxicity in the patterns of glycogen distribution and histological structure of heaptic tissues.

• Korean Journal of Veterinary Research
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• v.36 no.2
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• pp.379-387
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• 1996

The objects of the present study were to establish the method of purification, subunit dissociation of verotoxin-2 (VT2) produced by Escherichia coli O157:H7, and to investigate the characteristics of purified verotoxin-2 such as molecular weight and composition of amino acid. The results were summerized as follows; Verotoxin-2 was extracted by addition of polymyxin B sulfate into bacterial cell lysate prepared from Escherichia coli O157:H7(KSC109). As an initial step, the bacterial cell lysate was precipitated with 30% saturated ammonium sulfate. The precipitated crude toxin was then subjected to anion-exchange, chromatofocusing and cation-exchange chromatography. Using this scheme, we obtained highly purified toxin with a specific activity of $1.1{\times}10^9$ $CD_{50}/mg$. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis(SDS-PAGE) for purified VT2 showed two protein bands. The upper band, approximately 32 Kd, was supposed as A subunit and the lower band, approximately 7.7 Kd, was supposed as B subunit. When the toxin was separated in the subunit-dissociating solution, two peaks emerged with retention times of 15 and 28 min by HPLC. These peaks represented A subunit and B subunit, respectively. The amino acid composition of purified VT2 were made up in order of glutamic acid, histamine, asparaginic acid, histidine, lysine, alanine and leucine etc. The largest amount among the amino acid composing VT2 was methionine.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.507-509
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• 2012

IHO has established S-100 Standard profiled from ISO 19100 GIS standards for standardization and improvement of hydrographic data and are developing S-10X Standards. IMO is implementing the e-Navigation strategy for maritime safety and marine environment protection and has established the CMDS as information standard framework which will be developed from the S-100 standard. The development domain of e-Navigation can be divided into onboard, communication network, onshore and VTS is a core actor in onshore system. In this study, we analyzed the effects of S-100 standard development on VTS through e-Navigation strategy of IMO and suggested the cooperation between hydrographic fields and VTS fields under e-Navigation strategy.