• Journal of Korean Society of Coastal and Ocean Engineers
• /
• v.22 no.6
• /
• pp.361-373
• /
• 2010

Analysis has been made on the tide/storm surges characteristics near the Korean marginal seas in the 2008 and 2009 years using operational ocean prediction model of the Korea Meteorological Administration(KMA). In order to evaluate its performance, its results were compared with the observed data by tidal stations around Korean Peninsula. The model used in this study predicts very well the characteristics of tide/storm surges near the Korean Peninsula. Simulated storm surges show the evident effects of Typhoons in summer season. The averaged root mean square error(RMSE) of 48 hr forecasting between the modeled and observed storm surges are 0.272 and 0.420 m in 2008 and 2009, respectively. Due to strong sea winds, the highest storm surges heights was found in summer season of 2008, however, in 2009, the high storm surges heights was also found in other seasons. When Typhoon Kalmaegi(2008) and Morokot(2009) approached to Korean Peninsular, the accuracy of model predictions is almost same as annual mean value but the precision accuracy for Typhoon Morakot is lower than of Typhoon Kalmaegi similar to annual results.

• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.11 no.6
• /
• pp.31-39
• /
• 2012

This study aims to suggest a methodology of localizing and calibrating parameters, such as acceleration, deceleration, and lane changing which are the basis of car following model in interrupted traffic flow to overcome the limitation of origin and destination based transportation simulation and to verify the application of activity-based model for use in Korean roadway condition in a large scale area or a city. Especially, we figured out that a proper cell size reflecting Korean traffic conditions is 1.0m rather than 7.5m which is default size and a methodology of tracking vehicle behavior characteristics through tracking vehicle ID is suggested on this study. In addition, vehicle running characteristics in real interrupted traffic flow is analyzed through subdividing vehicle types and updating vehicle type ratio. For verification of suggested model, some portion of Dalgubyul-ro in the Daegu city is tested, and the possibility of realization of interrupted traffic flow in simulation is studied.

• Journal of the Korean Society of Propulsion Engineers
• /
• v.24 no.6
• /
• pp.78-84
• /
• 2020

The performance of pintle thruster is analyzed by using the pintle thruster performance analysis model which integrating the element models introduced in Part I. To verify the performance analysis, the results of the developed program are compared with the experimental data of kerosene/hydrogen peroxide liquid pintle thrusters. Based on the results, the characteristics of the pintle thruster are analyzed. The sensitivity analysis is performed to investigate the effect of thruster shape and operation parameters on performance characteristics using both OAT and scatter plot methods. The four performance parameters such as droplet diameter, film flow rate, O/F ratio, and nozzle throat diameter are evaluated to investigate their effects on characteristic speed, combustor pressure, and specific thrust.

• 한국HCI학회:학술대회논문집
• /
• 2007.02a
• /
• pp.653-660
• /
• 2007

최근 국내외 소프트웨어 개발 특성의 변화인 잦은 요구사항의 변경, 단축된 비즈니스 라이프사이클, 비용절감의 압력등과 맞물려 생산성을 높이기 위한 개발 접근방식이 요구되었으며, 소프트웨어의 재사용 및 높은 생산성을 제공할 수 있는 대표적인 방법이 디자인 패턴이다. 본 연구는 웹 어플리케이션 시스템 개발에 실제 적용가능한 UI디자인 패턴모델을 개발하기 위해 20개의 웹 어플리케이션 시스템을 표본으로 추출하여 1000여개의 단위업무화면을 분석하였다. 개발한 어플리케이션 UI 디자인 패턴 모델을 실무 전문가(UI디자이너, 개발자)들에게 이해도, 사용적합성, 생산성측면에서 검증하여 실무에 적용가능한 모델임을 객관적으로 증명하였다.

• 한국사회복지학회:학술대회논문집
• /
• 2003.05a
• /
• pp.245-265
• /
• 2003

본 연구의 목적은 국내 사회복지악계의 사회적 지지에 관한 지난 10여년간의 연구를 정리하고 집중적인 내용분석을 아는데 있다. 분석대상논문은 1990년대 이후부터 2002년까지 노인관련 학술지와 사회복지학술지에 게재된 사회적 지지에 관한 연구들이며, 총 30여편이었다. 연구결과는 사회적지지에 관한 연구들은 90년 중반부터 활발히 연구되었으며, 사회적 지지의 연구대상은 노인이 많았다. 사회적지지에 대한 개념 측정은 기능적 특성을 측정한 연구가 많았고, 측정도구의 사용이 불분명해서 측정도구의 타당성 문제와 표준화된 척도의 필요성이 제기되었고, 효과성 검증결과에서는 주효과모델보다 완충효과 모델의 연구가 적어, 향후 완충효과모델에 관한 연구의 필요성을 제시하였다.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2010.05a
• /
• pp.461-462
• /
• 2010

In this paper, 3D information model for PSC bridge was applied and verified its effectiveness at the construction stage. To define 3D information model of PSC bridge, characteristics of PSC bridge were analyzed and 3D model structure was constructed.

• Spatial Information Research
• /
• v.3 no.1
• /
• pp.65-80
• /
• 1995

GIS has been developed very rapidly during last few decades and the performance of GIS in terms of information processing such as automated mapping and facility management has been tremendous. However, its analytical capability is still very limited and it is often critisized due to lack of reality. The objective of this research is that first, linking housevalue models to GIS, second, reflecting the complexity of real world into the housevalue model using GIS in terms of incorpor¬rating polycentric urban structure and calculating distance through street network, and third, comparing the results of housevalue model at census tract to that of block group level.

• 한국벤처창업학회:학술대회논문집
• /
• 2023.11a
• /
• pp.117-121
• /
• 2023

본 연구는 B2B (business-to-business) 비즈니스 모델 혁신(business model innovation, BMI)이 B2C (business-to-consumer) 비즈니스 모델 혁신 대비 혁신성과에 미치는 상대적 효과를 실증적으로 검증하고자 한다. BMI의 하위요인을 가치창출(value creation), 가치제안(value proposition), 가치획득(value capture)으로 나누어 각각의 요인 간의 관계를 구체적으로 분석한다. 본 연구는 실증분석을 위해 2022년 기업가정신 실태조사(기업편) DB의 3,120개 기업을 활용하였다. 분석 결과, BMI 중 가치창출은 B2B (vs. B2C) 혁신성과에 미치는 영향이 더 크며 유의한 것으로 나타났다. 반면 가치제안은 B2C (vs. B2B) 혁신성과에 미치는 영향이 더 크며 유의한 것으로 나타났다. 본 연구의 결과를 통해 주 비지니스 대상에 따라 BMI가 혁신성과에 상이한 영향을 미친다는 것을 실증했다는 점에서 학술적 의의가 있으며, 기업 특성에 따른 차별화된 BMI를 추구하는 것이 중요하다는 실무적 시사점을 가진다.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.22 no.2
• /
• pp.76-82
• /
• 2018

In this present study, in order to update the finite element model considering the boundary conditions, a method has been proposed. The conventional finite element model updating method, updates the finite element model by using the dynamic characteristics (natural frequency, mode shape) which can be estimated from the ambient vibration test. Therefore, prediction of the static response of an actual structure is difficult. Furthermore, accurate estimation of the physical properties is relatively hard. A novel method has been proposed to overcome the limitations of conventional method. Initially, the proposed method estimates the rotational spring constant of a finite element model using the deflection of structure and the rotational displacement of support measurements. The final updated finite element model is constructed by estimating the material properties of the structure using the finite element model with updated rotational spring constant and the dynamic characteristics of the structure. The proposed finite element model updating method is validated through numerical simulation and compared with the conventional finite element model updating method.

• The Journal of the Acoustical Society of Korea
• /
• v.21 no.8
• /
• pp.671-678
• /
• 2002

High-frequency monostatic reverberation model (HYREV: HanYang Univ. REVerberation model) suitable for shallow-water environment is presented. It is difficult to predict reverberation signals in shallow water due to scattering from sea surface and seafloor. The arrival times and transmission losses from the source to scatterers are obtained from the eigenrays. The composite roughness theory is used to predict the boundary scattering. The signals generated by the HYREV and the GSM were compared with the observed signals and it is showed that the HYREV model provided a closer fit to the observed signals than those obtained using the GSM.