• 수산해양교육연구
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• 제21권1호
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• pp.68-77
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• 2009

In this study it will be discussed how to solve the problem of discomfort from rolling motion on the small fishing boats. Up to now, the equipments of reducing rolling system can be examined by various case, but difficult to apply small vessel by function, space and costly establishment. A way of improving the feeling of getting on a boat through the equipped sail at stern edge of bulwark top was researched and developed. The author has tested the sailing performance of the experimental skiff boat, from the signals obtained by the inclinometer in irregular waves and compared with the results got in sail on and off mode operation for 10 minutes duration at the conditions of stop and underway. These data has been analyzed in the application statistical methods. Eventually we summarize the analyzed results obtained from the vessel while stationary and underway for two cases, the vessel with a sail and the vessel without a sail. The field test was done in Jeju outer harbor. The ratio of the motion responses at resonance for the sail with and without cases indicate that under given conditions the motion was reduced by the efficiency of diminution is 4.726%, 2.792% in the stopping and 11.663%, 3.282% in the underway and mean rolling periods are 2.158, 2.142, 2.421, 2.412sec. and 1.968, 1.963, 2.089, 2.051sec. respectively. Consequently the efficiency of diminution was higher when the ship is underway and rolling periods got longer in the equipped sail.

• 수산해양기술연구
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• 제26권2호
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• pp.167-172
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• 1990

부산-제주간 선로상에서 정박중일 때와 항행중일 때 Loran C 위치를 관측하여 시간대별, 지역별, 침로별 위치의 정도와 편위오차를 수정하여 분석.검토한 결과는 다음과 같다. 1. 주야간별 위치의 정도는 큰 차이가 없었고, 수신점주위에 높은 산이 있을 경우 편위거리의 오차가 더욱 커졌다. 2. 정박중과 항행중에 편위거리의 평균치는 각각 0.188, 0.452마일이었고, 침로의 변화에 따른 측위오차의 변동은 거의 없었다. 3. 위치정도를 높이기 위해서는 속도보정과 측지계변환만으로도 정도가 높은 위치를 구할 수 있었다

• 원자력산업
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• 제5권11호통권33호
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• pp.4-7
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• 1985

• 수산해양기술연구
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• 제51권1호
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• pp.71-78
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• 2015

In order to deduce an objective evaluation method of motion seasickness incidence (MSI) by ship motions during underway in irregular waves and to present the fundamental data of passenger comfort on the yacht and the passenger ship according to the result, the MSI of the trainees by the questionnaires was analysed and compared with the rate of variation of salivary ${\alpha}$-amylase activity (VSAA) on the training ship "A-ra ho" of Jeju national university. Relationship between rate of variation (x) by salivary ${\alpha}$-amylase activity and motion seasickness incidence (y) was described by the equation, MSI(%) = 0.6073 x + 12.189 including the correlation coefficient ($R^2=0.9853$). The result obtained through the rate of variation of salivary ${\alpha}$-amylase activity which was the quantitative evaluation method for ship motions causing seasickness was most affected by z-vertical acceleration and occurred within the frequency range 0.1 to 0.3Hz centered on 0.2Hz, and the simulation result based on this finding showed the motion seasickness rate at approximately 4% lower than the rate obtained through the survey.

• 천문학회지
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• 제29권spc1호
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• pp.367-370
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• 1996

Construction of the 'Two-degree Field' (2dF) instrument on the Anglo-Australian Telescope (AAT) is now virtually complete and commissioning is well underway. The key components are described. Several recent milestones are reported, including the first scientific results. Future prospects and plans are discussed.

• IMMUNE NETWORK
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• 제5권2호
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• pp.55-67
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• 2005

Cancer vaccine is an active immunotherapy to stimulate the immune system to mount a response against the tumor specific antigen. Working as a stimulant to the body's own immune system, cancer vaccines help the body recognize and destroy targeted cancers and may help to shrink advanced tumors. Research is currently underway to develop therapeutic cancer vaccines. It is also possible to develop prophylactic vaccines in the future. The whole cell approach to eradicate cancer has used whole cancer cells to make vaccine. In an early stage of this approach, whole cell lysate or a mixture of immunoadjuvant and inactivated cancer cells has been used. Improved vaccines are being developed that utilize cytokines or costimulatory molecules to mount an attack against cancer cells. In case of melanoma, these vaccines are expected to have a therapeutic effect of vaccine. Furthermore, it is attempting to treat stomach cancer, colorectal cancer, pancreatic cancer, and prostate cancer. Other vaccines are being developing that are peptide vaccine, recombinant vaccine and dendritic cell vaccine. Out of them, reintroduction of antigen-specific dendritic cells into patient and DNA vaccine are mostly being conducted. Currently, research and development efforts are underway to develop therapeutic cancer vaccine such as DNA vaccine for the treatment of multiple forms of cancers.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.338-340
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• 2012

영상에서 에지는 영상의 특징을 분석하는 중요한 요소이며 여러 응용 분야에 선택적으로 활용되고 있다. 이러한 에지를 검출하고 활용하기 위한 많은 연구들이 지금까지도 진행되고 있으며, 초기에는 에지를 검출하기 위하여 인접한 화소들의 관계를 이용한 방법들이 제안되었다. 이러한 방법들의 특징은 알고리즘의 처리가 빠르지만 영상에 관계없이 특정 가중치가 모든 화소에 동일하게 적용되는 것이다. 이와 같은 기존의 방법의 단점을 보완하기 위하여, 최근에는 영상에 따라 적응하여 에지를 검출하는 알고리즘의 연구가 활발히 진행되고 있다. 따라서 본 논문에서는 에지를 우수한 특성으로 검출하기 위해 적응 마스크를 이용한 알고리즘을 제안하였다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제12권4호
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• pp.285-289
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• 2012

In a coastal area, all of the vessels are always exposed to the potential risk, taking into the maritime accident statistics account over the last decades. To manage vessels underway safety, the characteristics of ship movements in a fairway should be recognized by VTS system or VTS operators. The IMO has already mandated the shipboard carriage of AIS since 2004, as stated in SOLAS Chapter V Regulation 19. As a result, the static and dynamic information of AIS data has been collected for vessel traffic management in the coastal areas and used for VTS. This research proposes a simple algorithm of recognizing potentially risky ships by observing their trajectories on the fairway. The static and dynamic information of AIS data are collected and the curvature for the ship trajectory is surveyed. The proposed algorithm finds out the irregularity of ship movement. The algorithm effectively monitors the change of navigation pattern from the curvature analysis of ship trajectory. Our method improves VTS functions in an intelligent way by analyzing the navigation pattern of vessels underway.

• 천문학회보
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• 제36권2호
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• pp.82.1-82.1
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• 2011

Korea Astronomy and Space Science Institute (KASI) operates 2 solar radio observing facilities, e-CALLISTO (Earthwide network of Compound Astronomical Low-cost Low-frequency Instrument for Transportable Observatory) station and Korean Solar Radio Burst Locator (KSRBL). Although e-CALLISTO tracking system improvement.is underway, at least 6 new events were observed in this year. Software development for KSRBL is in progress. The antenna calibration software was updated and flux calibration software was developed. Also the automatic daily overview spectrum monitoring system is now operational. We found solutions to several problems including spurious data and FPGA board communication. However, a few minor unsolved hardware problems still persist. Meanwhile, at least 6 new events were observed by KSRBL in this year, and a comparative study with HXR is currently underway.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2005년도 춘계학술대회 논문집
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• pp.263-271
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• 2005

해상 준설선을 이용한 항로의 준설시공 과정에서 중요한 점은 작업구역의 공간적 축소로 여유통항수역의 제공과 수면하의 위험물 배제로 안정항행을 제공하는 것이 기본이다. 이를 위해서는 준설선의 이동과 고정을 위한 보조장치의 적극적인 활용과 함께 부대 장비의 실시간 위치 확인, 실시간 준설수심 확인 및 작업정보 등을 통합적인 정보로 제공하여 준설 작업의 자동화를 꾀해야 한다. 그런데, 본 연구에서 스퍼드 제어시스템을 비치한 준설선은 준설 시공시 준설구역 내 준설점 위치로 이동을 스퍼드로 하고 스퍼드는 자동제어 기술을 적용하여 준설선이 능동적 이동에 의한 준설시공을 행하여 최소의 작업공간을 점유하게 되므로 항행하는 타 선박의 안전한 통과를 허용하면서 준설공사를 중단 없이 시공할수 있다. 또한, 스퍼드 활용 항로준설시스템은 스퍼드의 거동쾌적은 물론 전자해도와 함께 작업심도 자료를 동시에 제공하므로 신속한 작업성과까지도 제시할 수 있다는 점에서 기존의 관리시스템과는 비교가 된다. 시스템 평가를 위한 부상항에서의 시험시공결과 일일 작업 시 기존의 앵카시스템을 이용한 작업시간의 2배정도를 실제 투입할 수 있었으며, 준설시공 요건별 비교에서도 준비시간을 38% 절감할 수 있었으며, 준비작업에 필요한 작업인력을 1인 줄일 수 있는 것으로 나타났다.