• 한국지형학회지
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• 제17권3호
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• pp.59-75
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• 2010

이 연구에서는 우산국 정벌의 동해 출항지를 검토하기 위해 조선시대 진·포구를 대상으로 자연환경 입지 평가를 실시하였다. 연구결과, 연구지역에는 조선시대 수군진과 진·포구가 총 55개소였으며, 그중 연곡포, 안인포, 삼척포, 수산포, 월송포 등에는 수군진이 위치하였다. 6세기경의 해수면 복원 결과에서는 현재의 해수면보다 당시 약 1m 정도 높았던 것으로 분석되었다. 진포구의 입지유형 분류에서는 자연환경 분석을 통해 3가지 유형으로 분류되었다. 입지유형I은 중·소하천의 만입지에 위치하고, 그 전면에 사취가 발달하여 피항 및 방어에 가장 적합한 입지조건을 가진 진·포구로 총 21개소이다. 입지유형 II는 외해에 직접 접하고 있는 진·포구들로 총 22개소이며, 입지유형 III은 만입지를 중심으로 형성된 진·포구들로 총 12개소이다. 입지유형 I을 대상으로 한 최단거리분석에서는 총 9개소, 배후지 경사분석 결과에서는 15개소, 배후지 면적분석에서는 총 13개소, 가시권 분석에서는 13개소, 해류분석에서는 총 11개소의 진·포구가 출항지 입지요인을 만족하고 있는 것으로 나타났다. 최종평가 결과, I등급 지역은 오분진과 망양진 등 총 2개 진·포구였다. 그중 오분진이 피항 및 방어에 가장 유리한 입지 특성을 가졌으며, 수심이 깊고 만입지가 넓어 대규모 선단의 정박에 유리하였다. 따라서 오분진 지역은 우산국을 정벌하기 위해 이사부가 출항했을 가능성이 가장 높은 출항지로 검토되었다.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2007년도 춘계학술발표회 논문집
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• pp.471-474
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• 2007

On the road, geometric structure such as horizontal alignment, vortical alignment and crossing inclination ate important to explain characteristics of road and safety analysis. Especially, horizontal and vortical alignment are have to do with safety of covering. In existing road, for the safety analysis or alignment improvement and expansion pavement, it needs alignment factor of road. Alignment factor of road can be acquired by design drawing. But, design drawing can be not exist because of rack of facility management and national policy that centered to construction. And also, existing design drawing have a lot of differences in comparison with another existing design drawing cause of alignment improvement. In this case, for the precise analysis of alignment, 3-dimensional location information on the road centerline and acquisition of location information which related geometric structure are must to be preceded. In this study, therefore, it provide alignment factors which needed to alignment improvement and road safety analysis by acquisition of road space information and extraction of road centerline data using LiDAR data.

• 한국항공우주학회지
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• 제38권5호
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• pp.403-413
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• 2010

PSE와 $e^N$-method를 이용하여 익형 위 경계층의 천이지점을 예측하였다. PSE 해석으로 부터 교란의 증폭률을 얻고 증폭률의 적분을 통해 N-factor 곡선들을 계산하였다. 평판 및 익형 위 경계층에 대한 계산결과를 기존 문헌 결과와 비교하여 코드의 검증을 수행하였다. NACA0012, NLF(1)-0414F 그리고 NLF(1)-0416 익형 위 경계층에 대한 천이지점을 예측을 수행하였다. 예측된 천이지점들이 실험결과들과 잘 일치함을 확인하였다.

• 한국환경과학회지
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• 제17권1호
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• pp.119-128
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• 2008

Laboratory analytical results of 22 sets of hydrophobic adsorbent coils containing surface soil-vapor and two soil samples collected by conventional intrusive method from each boring location at two active dry cleaning facilities in the State of Illinois, U.S.A, were presented to evaluate the performance of soil-vapor survey. The most critical factor to determine the effectiveness of soil-vapor survey is the distance from the soil-vapor sampling device to the actual contamination, which is a function of soil porosity, permeability, primary lithology, and other geological and hydrogeological site-specific parameters. Also this factor can be affected by the history of contaminant-generating operations. The laboratory analytical results in this study showed longer dry cleaning operation history (i.e., 50 years) and presence of fine sand at the beneath Site B allow the contaminants to migrate farther and deeper over a fixed time compared to Site A(i.e., 35 years and silty clay) so that the soil-vapor survey is not likely the most effective environmental site investigation method alone for Site B. However, for Site A, the soil-vapor survey successfully screened the site to identify the location reporting the highest soil concentration of chlorinated solvents.

• Journal of Korean Neurosurgical Society
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• 제29권8호
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• pp.995-1000
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• 2000

Objective : The authors reviewed 280 cases with intracranial arteriovenous malformations(AVMs) to identify risk factors of hemorrhage. Patients and Methods : From 1983 to 1997, a total 280 patients with AVMs were treated. Among them, 64% had a history of hemorrhage. Angiograms were retrospectively analyzed with particular attention to the size of the AVM, venous drainage, the location of the AVM and presence of associated aneurysm or varix. These characteristics were statistically analysed in relation to occurrence of hemorrhage. Results : A single variate analysis demonstrated that small size(p=0.0003), deep venous drainage(p=0.025) and periventricular location(p<0.0001) had a strong positive correlation. Associated aneurysms and varices were not found as hemorrhagic risk factors. A multivariate analysis revealed that the size of the AVM was most significant hemorrhagic factor(p=0.0003) followed by deep venous drainage(p=0.025). AVMs with small size and deep venous drainage bled more frequently regardless of their locations. Conclusion : These data would be useful in identifying patients at higher risk for developing hemorrhage of intracranial AVMs.

• Earthquakes and Structures
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• 제8권5호
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• pp.977-994
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• 2015

In this study, earthquake loads are investigated statistically and compared with the nominal earthquake loads calculated according to the Turkish Earthquake Code, namely: "Specifications for Structures to be Built in Earthquake Areas". For this purpose, the "actual" mean load values estimated from statistical methods and the nominal load values computed according the Seismic Code are compared, with respect to some variations in the basic parameters, such as the importance factor, building height, site coefficient, seismic zone and seismic load reduction factor. In addition to the data compiled from different regions of Turkey, the published data and information in the foreign literature are also used in the determination of the earthquake load statistics. Although the dead and live loads acting on a structure are independent of the geographical location of the structure, environmental loads, such as earthquake loads are highly dependent on the location of the structure. Accordingly, for the assessment of statistical parameters associated with earthquake loads, twelve different locations which can represent the different seismic zones of Turkey as accurately as possible are chosen. As a result of the code calibration procedure considered in this study, it is observed that the load values obtained from the Turkish Seismic Code may overestimate or underestimate the actual seismic loads in some of the seismic zones.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2007년도 제29회 추계학술대회논문집
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• pp.17-20
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• 2007

연소실내 형성되는 접선방향 음향 모드의 감쇠를 위해 장착되는 공명기의 반경 방향 위치 효과에 대해 실험적으로 연구하였다. 반파장 공명기를 채택하였고, 상온에서 선형 음향 실험을 수행하였다. 감쇠 대상 음향 모드에 대해 공명기가 최적의 길이를 갖는 경우에는, 반경 방향 위치의 증가에 따라 음향 감쇠 효과가 증가하였다. 또한, 반경방향으로의 감쇠 인자의 변화 추이는 감쇠시키고자 하는 음향 모드의 진폭 변화 추이와 유사하였다. 장착 위치가 장착변의 중심에 접근할수록 음향 감쇠 효과가 감소할 뿐만 아니라 분사기 길이와의 상관성도 감소하였다. 공명기가 비최적 길이를 갖는 경우에는, 반경 방향 위치 효과가 거의 나타나지 않아 위치와 무관한 감쇠 인자값을 관찰할 수 있었다.

• Geomechanics and Engineering
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• 제14권1호
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• pp.71-81
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• 2018

Soils are mostly nonhomogeneous and anisotropic in nature. In this study, nonhomogeneity and anisotropy of soil are taken into consideration by assuming that the cohesion increases with depth linearly and also varies with respect to direction at a particular point. A three-dimensional rotational failure mechanism is adopted, and then a three-dimensional stability analysis of slope is carried out with the failure surface in the shape of a curvilinear cone in virtue of the limit analysis method. A quasistatic approach is used to develop stability charts in nonhomogeneous and anisotropic soils. One can easily read the safety factors from the charts without the need for iterative procedures for safety factors calculation. The charts are of practical importance to prevent a plane failure in excavation slope whether it is physically constrained or not. Then the most suitable location of piles within the reinforced slope in nonhomogeneous and anisotropic soils is explored, as well as the interactions of nonhomogeneous and anisotropic coefficients on pile reinforcement effects. The results indicate that piles are more effective when they are located between the middle and the crest of the slope, and the nonhomogeneous coefficient as well as the anisotropic coefficient will not only influence the most suitable location for piles but also affect the calculated safety factor of existing reinforced slope. In addition, the two coefficients will interact with each other on the effect on slope reinforcement.

• 대한안전경영과학회지
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• 제9권5호
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• pp.103-110
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• 2007

To build a most efficient and competitive warehouse, need to reflect tenants various opinions in advance such as location, rentable size, leasing terms, rental, configuration of the building, building structure, traffic flow and amenities. Thus a survey for major tenants which are logistics, retailers and manufactures should be done to figure out potential demand and marketing strategy to lead to be a competitive warehouse. However above survey is time consuming work and requires high cost involvement thus to avoid such an inefficient process and to facilitate investors prompt and right decision making, there should be a tool which helps to make a decision process easier with simple key factors. In other word, we have used above mentioned 'Demand Approach' so far but here I am introducing 'Factors Comparison' which reflects location factors and facility factors. I derived Kwang-myung logistics park's proper rental rate through 'Demand Approach' which analyzed Seoul Metropolitan area's rental warehouse status and rents, and also defined a size of potential demand area and rental. And this report compared the result with an outcome of 'Factors Comparison' then compared each methods and drew a conclusion of 'Factors Comparion's better convenience and efficiency.

• Journal of Electrical Engineering and Technology
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• 제2권1호
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• pp.123-128
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• 2007

SPWPM traditional software development is surveyed and essential problems are investigated on the basis of system wireless link considerations. This paper presents the current state software planning tools for wireless LAN link optimization. The software directory is based on combination of MatLab and MapInfo software and measurement which gives the best grouping parameters to build up the software development. Among the requirements assumed, the WLAN site selections must be Line-of-sight (LOS) or near line of sight (NLOS) field strength prediction for either point to point or point to multi points. The results obtainable the out put of the program include two-dimensional (2D) and three dimensional (3D) plots for creating the link; design parameters through GUI representing the height and location for each antenna is depending on K-factor of the area and transmit antenna location.