• Proceedings of the KGS Conference
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• 2004.05a
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• pp.95-95
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• 2004

웅포는 금강의 배후 습지를 중심으로 형성된 마을이다. 일찍이 나루 기능과 내륙 수운을 통해 다른 지역과 내륙지역을 이어주는 포구의 기능을 수행하였다. 서해안과 가까운 하류부에 위치하고 있어 어선의 입항으로 수산물의 거래가 활발하고, 정기시장이 열리면서 육상 교통이 발달되기 전까지 포구 기능이 유지되었다. 우포는 백제시대에 포구가 형성되어 중국과 해상으로 교역하는 단계에 이르렀다. (중략)

• Journal of the Korean Society of Propulsion Engineers
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• v.12 no.5
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• pp.60-66
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• 2008

Each weapon system's muzzle velocity can be used as basic data for operating accurate automatic firing control system. Even among the same kind of ammunition, despite taking into consideration various battlefield parameters, irregular performance causes difficulties in obtaining accurate muzzle velocity data. In this study, pressure in the gun barrel was measured, the experimental relationship between chamber pressure and the projectile's base pressure was found, and a method of obtaining muzzle velocity was researched. Through this method, data regarding muzzle velocity is offered that corrects irregular performance.

• 건강소식
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• v.29 no.11 s.324
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• pp.42-43
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• 2005

사랑하는 가족, 연인과 함께 떠나는 가을 나들이에 맛깔스런 음식만큼 여행을 즐겁게 해주는 것도 없다. 그래서 쌀쌀한 날씨에도 불구하고 잃어버린 입맛을 찾게 해주는 미각 여행에 많은 사람들이 목숨(?)을 거는지도 모르겠다. 집 나가면 고생이라지만 집안에서 하루종일 텔레비전만 부여잡고 있을 수만도 없는 일. 먼 거리 여행이 부담스럽다면 수도권 주변으로 눈을 돌려보자. 그리 멀지 않은 곳에 눈과 입을 모두 즐겁게 해줄 곳이 있다. 그중 인천 소래포구는 월미도 등 다양한 볼거리와 함께 싱싱한 먹을거리가 있는 찾기 쉬운 여행지다. 특히 소래포구의 활기 넘치는 어시장에 지친 몸과 마음에 한껏 활기를 불어넣어 줄것이다.

• Journal of Advanced Navigation Technology
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• v.23 no.2
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• pp.142-150
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• 2019

Muzzle Velocity is one of the most important measurement items for evaluation of ammunition. The muzzle velocity is defined as the velocity when the projectile leaves the muzzle. Particularly, since the muzzle velocity is closely related to the performance of the propellant, precise measurement of muzzle velocity is required. Doppler radar is used to measure the muzzle velocity, but the quality of Doppler radar signal depends on the test site environment. In this paper, a method to remove the clutter that degrades the signal quality of Doppler radar by improving the structure of the test site and the signal processing method is suggested. For the application of the improved signal processing method, a program for acquiring Doppler radar's raw Doppler data was created. Statistical verification of the velocity data obtained through the improvement of the test site structure and signal processing method proved that the proposed method is effective for the removal of clutter as compared with the existing method.

• Journal of The Geomorphological Association of Korea
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• v.17 no.3
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• pp.59-75
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• 2010

In this study, location evaluation of the natural environment of ports in the Joseon Dynasty was carried out to investigate the outport of east coast for the conquest of Usanguk. As a result of study, there were 55 ports and naval stations in the Joseon Dynasty, including the Yeongokpo, Aninpo, Samcheokpo, Susanpo, and Wolsongpo. As a result of the restoration work in the sea level that was done in the sixth century, the sea level at that time was about 1m higher than that at present. In terms of the location type, three types were identified via natural-environment analysis. Location type I consists of a total of 21 ports suitable for defense due to the sand spit in all the sides and because it is located in the bay of small and medium rivers. Location type II is composed of 22 ports close to the open seas, and location type III consists of a total of 12 ports centering on the bay. A total of nine ports satisfied the location factor in the shortest distance analysis(targeting location type I), 15 ports in the slope analysis, 13 ports in the hinterland analysis, 13 ports in the visibility analysis, and 11 ports in the ocean current analysis. It was found in the final evaluation that the I level regions consist of two ports(Obunjin and Mangyangjin). Obunjin has a location characteristic that is advantageous for defense and that makes it suitable to serve as an anchorage harbor for a large-scale fleet as its water level is deep and as it has a wide embayment. In conclusion, Obunjin is considered the outport that has the highest possibility of serving as Isabu's departure port for the conquest of Usanguk.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.11a
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• pp.339-343
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• 2009

The aim of the study was to investigate the statistical distribution of muzzle velocity of 155mm propelling charge K676 which is for the use of K9, a korean 155mm self-propelled artillery. A plenty of muzzle velocity data were collected from lot assessment test of propelling charge. The muzzle velocity of each test round is compensated by reference round. In the present work, the detailed statistical analysis of the muzzle velocity data is carried out using probability models including normal, Weibull 2-parameter and Weibull 3-parameter distributions. The results of goodness of fit test showed that the normal distribution described more appropriately the experimentally measured muzzle velocity data and the Weibull distribution is also applicable. The coefficient of variation showed that the mass production capability of each propelling charge lot has been maintained.

• Economic and Environmental Geology
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• v.55 no.2
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• pp.137-148
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• 2022

In this study, ship movement simulation was performed based on a marine physics model for the ancient port presumed under the past environmental conditions in the coastal area of Hwaseong, which played an important role as a center of trade in the Three Kingdoms and Unified Silla periods. The paleo topographical surface was reconstructed through the analysis of borehole sediments, and the paleo coastline was extracted through the geomorphological maps published during before independence. Based on the established paleo environmental conditions of the Hwaseong coast, the marine physics model (FVCOM) was used to simulate the flow of surface currents and the route of floating materials assumed to be ancient ships. As a result, the processes of moving ships from the port to the open sea in the Eunsupo area, which is estimated location of the ancient port related to Dangseong, was well simulated, and thus the reliability of the location of the ancient port estimated by the scientific method was secured. This study is significant as a result of convergence research that encompasses archeology, history, geomorpology, geology, and oceanography.

• Vending industry
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• v.9 no.2
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• pp.36-39
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• 2009

서울시에 설치된 커피자판기는 과연 얼마나 될까? 그동안 자판기 시장 통계는 연도별 제조 통계만 있었지, 필드에 설치되어 운영되는 자판기들에 대한 공신력 있는 통계는 부족했던 것이 사실이다. 그런데 이번에 안심 커피자판기 사업을 추진하는 서울시청의 협조를 통해 '서울시 자피구별 자판기 설치 현황'에 대한 자료를 제공받았다. 이 자료에 의하면 서울시에 설치된 자판기는 총14,387대이고 자치구 중에는 영등포구가 866대로 가장 많았다. 반면 가장 적게 커피자판기가 설치된 자치구는 금천구로 279대에 불과했다. 기타 서울시 커피자판기 설치 현황이 어떤 특징을 보이는 지를 살펴봤다.

• 열린충남
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• s.44
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• pp.134-147
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• 2008

• Korean Architects
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• no.4 s.312
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• pp.71-71
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• 1995