• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.1287-1294
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• 2006

A pile is compressed with settlements when loading and bearing capacity is altered along relative displacement of pile/soil on settlement and compression. Settlements of pile displaying limit skin friction is different from displaying tip resistance. Therefore, it is an error in traditional method that bearing capacity of pile is estimated from the sum of limit skin fraction and tip resistance. Accordingly, development of design method considering behavior of load-settlement is needed. In this study, we would like to establish the base for development of design method considering bearing capacity altering along displacement on settlement and compression. For this, we established system and substance of design method. And in order to establish relationship of load-settlement of pile on the type of soil, we analyzed and arranged existing database and pile loading test. On design method, settlement is assumed gradually on each capacity level being assumed gradually. Bearing capacity developing on the pile is obtained on each settlement level. Until the obtained bearing capacity will be equal to assumed capacity, this process is continued with increasing settlement. Load-settlement curve for soil classification is sketched in the process computing settlement on assumed capacity. This design method will be materialized by computation program.

• 한국항공우주학회지
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• 제50권1호
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• pp.31-38
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• 2022

위성용 TR모듈이 지상용 또는 항공용 TR모듈과 다른 점은 높은 레벨의 진동, 충격과 같은 발사환경과 우주방사능, 진공, 온도 변화와 같은 궤도환경 고려가 필요하다는 것이다. 따라서 지상용 또는 항공용 요구사양과는 다른 전기적, 구조적 조건을 요구한다. 이에 따라 서론에서는 발사환경, 궤도환경에 대해서 서술하고, 본문에서는 위성용 TR모듈에서 GaN의 활용과 요구되는 조건을 충족하기 위한 설계 과정을 기술한다. 특히, 부품선정부터 Derating&RF Budget 설계, 공정설계, 열해석까지 각각 단계에서 고려할 설계요소에 대해서 서술한다.

• 한국화재소방학회:학술대회논문집
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• 한국화재소방학회 1997년도 International Symposium on Fire Science and Technology
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• pp.423-438
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• 1997

Today's building and fire prevention codes are mostly prescriptive. Prescriptive codes are based on major fires in earlier years that created a need for specific building provision. These codes provide a minimum level of safety. As the general and engineering uses of computers have increased over the years, so has use of computers in the fire protection engineering. This has allowed fire protection engineers to develop alternative approaches to solve today's fire protection problems or to evaluate the performance of a specific fire safety goal. A performance based approach to building and fire codes involves the following: 1) identifying specific goals, such as, safely getting out of the building in 10 minutes, 2) obtain conceptual approval from authorities, 3) define performance level, 4) develop design solutions and identify tools such as, fire tests, models, or methods, to demonstrate that a design will meet the fire protection objective 5) test solutions, 6) present test method and results to the authorities. Some people in the fire protection community consider this to be nothing more than an intellectual exercise, while the others view it as a way to reduce expenses on large project$^4$ Others in fire protection community view this as a way to refine the design process to design fire protection systems to better protect the fire hazards. This paper will focus on application of these tools, specifically computer fire models, to actual cases such as: design of a smoke control system heat transfer analysis and egress of building occupants during potential fires.

• 디자인학연구
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• 제13권
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• pp.105-113
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• 1996

The great development of the modern science enables the information technology including computer to be promoted, which has the great effects on the whole design field. Most of all, the computer has the feature to express the mathmatical formular through the logic and system, which is being used very efficiently in the design work. CG application to the two-dimensional design may be limited in promoting the basic ability synthetically through the direct and molding experience for its attribute, however, it is possible to create the effects on the different level in addition to those from the traditional skill. In particular, we should keep the fact in mind that the CG application in the design field will be able to accomplish the object only under understanding the attributes and functions for it to have. We should carry out the task to agree with. First, it is necessary to develop the various study on the educational environment to make the process to solve the problems and to promote the effects of the educational media in teaching design with the CG application. This study would make plans to approach that the computer can be utilized for the main method to create design despite of being limited in some point. Moreover, it suggests the possibility for the CG application in the course of building up and motiving the models by applied the basic system, which enables the computer to be applied centering around the composition of geometry pattern of the basic course of the two-dimensional design.

• 신재생에너지
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• 제5권3호
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• pp.32-39
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• 2009

The Samcheonpo ocean small hydropower plant (SHP) has a special feature of using marginal hydraulic head of circulating water system of fossil fuel power plant as a power source and having the characteristics of general hydropower generation and tidal power generation as well. Also, it contributes to reducing green house gases and developing clean energy source by recycling circulating water energy otherwise dissipated into the ocean. The efficiency of small hydropower plant is directly affected by effective head and flow rate of discharged water. Therefore, the efficiency characteristics of ocean hydropower plant are analyzed with the variation of water level and flow rate of discharged water, which is based on the accumulated operation data of the Samcheonpo hydropower plant. After the start of small hydropower plant operation, definite rise of water level was observed. As a result of flow pattern change from free flow to submerged flow, the instability of water surface in overall open channel is increased but it doesn't reach the extent of overflowing channel or having an effect on circulation system. Performance evaluation result shows that the generating power and efficiency of small hydropower exceeds design requirements in all conditions. Analysis results of CWP's water flow rate verify that the amount of flowing water is measured less and the highest efficiency of small hydropower plant is achieved when the effective head has its maximum value. In conclusion, efficiency curve derived from water flow rate considering tidal level shows the best fitting result with design criteria curve and it is verified that overall efficiency of hydropower system is satisfactory.

• 한국정보통신학회논문지
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• 제20권9호
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• pp.1778-1784
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• 2016

본 논문에서는 차선 검출 알고리즘에 병렬처리를 적용하여 성능을 개선하였다. 차선 검출은 지능형 보조 시스템으로써 자동차가 차선을 이탈하면 경보음 또는 핸들을 보정해줌으로써 운전자를 돕는 보조 시스템이다. 병렬 처리 알고리즘 중 데이터 레벨 병렬처리는 설계가 간단하지만 병목현상이 발생하는 문제가 있다. 제안하는 고속 데이터 레벨 병렬처리 알고리즘은 병목현상을 줄여 성능이 향상되었다. 실제 블랙박스 도로 영상을 도입하여 알고리즘을 측정한 결과 싱글 코어 경우 약 30 Frames/sec의 성능을 얻었다. 병렬처리를 적용한 결과로써 옥타코어 기준으로 데이터 레벨인 경우 약 100 Frames/sec의 성능을, 고속 데이터 레벨인 경우는 약 150 Frames/sec의 성능을 얻을 수 있다.

• 정보처리학회논문지A
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• 제12A권5호
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• pp.451-460
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• 2005

본 논문은 ffGA상에서 에너지 효율이 높은 데이터 경로 설계 방법론을 제안한다. 에너지, 처리시간, 그리고 면적간의 트레이드오프를 이해하기 위하여, 도메인 특성 모델링, coarse-grained 성능평가, 설계공간 조사, 그리고 로우-레벨 시뮬레이션 과정들을 통합한다. 도메인 특성 모델링 기술은 도메인의 특성에 따른 시스템 전체의 에너지 모에 영향을 미치는 여러 가지 구성요소와 파라미터들을 식별함으로써 하이-레벨 모델을 명시한다. 도메인이란 주어진 어플리케이션 커널의 알고리즘에 대응하는 아키텍쳐 패밀리이다. 하이-레벨 모델 또한 에너지, 처리시간 그리고 면적을 예측하는 함수들로 구성되어 트레이드오프 분석을 용이하게 한다. 설계 공간 조사(DSE)는 도메인에 명시된 설계 공간을 분석하여 설계 셋을 선택하도록 한다. 로우-레벨 시뮬레이션은 설계 공간 조사(DSE)에 의해 선택된 설계와 최종 선택된 설계의 정확한 성능평가를 위하여 사용된다. 본 논문에서 제안한 설계 방법은 매트릭스 곱셈에 대응하는 알고리즘과 아키텍쳐 패밀리를 사용한다. 제안된 방법에 의해 검증된 설계는 에너지, 처리시간과 면적간의 트레이드오프를 보인다. 제안된 설계 방법의 효율성을 보이기 위하여 Xilinx에서 제공되는 매트릭스 곱셈 커널과 비교하였다. 성능 비교 메트릭으로 평균 전력 밀도(E/AT)와 에너지 대 (면적 x 처리시간)비를 사용하였다. 다양한 문제의 크기에 대하여 Xilinx설계들과 비교하였을 때 제안한 설계 방법이 전력밀도(E/AT)에서 평균 $25\%$우수하였다. 또한 본 논문에 제안한 설계의 방법을 MILAN 프레임워크를 이용하여 구현하였다.

• International Journal of Control, Automation, and Systems
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• 제6권6호
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• pp.954-959
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• 2008

This paper is concerned with the reliable $H_{\infty}$ controller design problem for uncertain linear systems against actuator failures. In the design, the $H_{\infty}$ performance of the closed-loop system is optimized during normal operation(without failures) while the system satisfies a prescribed $H_{\infty}$ performance level in the case of actuator failures. Single and parameter-dependent Lyapunov function approaches are applied in designing suboptimal reliable $H_{\infty}$ controllers. Simulation studies are presented to demonstrate the effectiveness of the proposed design procedures.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2005년도 학술발표회 논문집
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• pp.1209-1213
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• 2005

It reflects well feature of slope that is characteristic of city river basin of Pusan local. Process various hydrological datas and basin details datas which is collected through basin basis data. weather satellite equipment(EMS-DEU) and automatic water level equipment(AWS-DEU) and use as basin input data of ILLUDAS model, SWMM model and HEC-HMS model In order to examine outflow feature of experiment basin and then use in reservoir design of experiment basin through calibration and verification about HEC-HMS model. Inserted design rainfall for 30 years that is design criteria of creek into HEC-HMS model and then calculated design floods according to change aspect of the impermeable rate. Capacity of reservoir was determined on the outflow mass curve. Designed imagination reservoir(volume $54,000m^3$) at last outlet upper stream of experiment basin, after designing reservoir. It could be confirmed that the peak flow was reduced resulting from examining outflow aspect. Designing reservoir must decrease outflow of urban areas.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1998년도 가을 학술발표회 논문집
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• pp.455-462
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• 1998

Analysis and design of vibrating machine foundations subjected to dynamic loads is a very complex problem. Thus it is difficult to set up an accurate analytical modeling. Generally, the design of foundations for vibrating machines has been performed by the equivalent static analysis which is generally based on engineer's experience and various assumptions The purpose of this study is to develop an integrated system which enables structural engineers to produce results of high quality within a short time in works related to structural analysis and design of foundation for vibrating machines. As the result of this study, level-up of application software is expected as well as improvement of quality in structural engineering and reduction of engineers' effort.