• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2005년도 춘계공동학술대회 발표논문
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• pp.592-598
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• 2005

The port, differently from general working places, is a closed area required for security, customs, and quarantine procedures. The loading and unloading is being done differently by ports, cargoes, and ships. To do loading and unloading, a lot of equipment and different types of labor are required, which flow is complicated and safe management is essential. As above mentioned the port is very unique and very deteriorated working place in its working environment. The purpose of this study is to propose ways to reduce and prevent from port accidents. As first step to do this, we have collected 923 accidents happened at Incheon Port during the period of 1994 to 2003. We have thoroughly analyzed characteristics, harmfulness, and risk of the loading/unloading they have done, as well as the accident frequency and relationship between the accidents. As second step to further analyze, We have employed DMAIC technology, an advanced process of 6 sigma presently in spotlight as the best program for management innovation. This analysis results in recognition of important accident characteristics, causes and effects analysis, critical causes of accident, and suggestions to decrease accidents.

• Journal of Korean Neurosurgical Society
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• 제40권6호
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• pp.441-444
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• 2006

Objective : The goal of this study is to evaluate the clinical results in six patients who underwent surgical decompression for the acute subdural hematomas[ASDH] of posterior cranial fossa. Methods : Six patients [five males and one female] who had undergone surgery for ASDH of posterior cranial fossa between 2000 and 2005, were evaluated retrospectively with regard to clinicoradiological findings and surgical outcomes. The mean age was 45.8 years [range $9{\sim}67\;years$]. Results : Preoperative computed tomography showed ASDH on cerebellar hemisphere in four patients and on midline in two. All patients had the associated lesions such as subarachnoid hemorrhage, epidural or subdural hematoma, intraventricular hemorrhage, contusion or pneumocephalus in supratentorial area. Fracture of occipital bone was noted in two patients. Of the four patients who had 13 to 15 of Glasgow coma scale score at the time of admission, three were deteriorated within 24 hours after trauma. Of these three patients, delayed subdural hematoma developed 1 hour after initial normal CT finding in one patient and increased in thickness in another one. Postoperative outcome showed good recovery in three patients and moderate disability in one. Two patients were expired. Conclusion : This study supports that early diagnosis based on strict observation and prompt surgery in the patients with ASDH in posterior fossa will lead to the best results.

• 조명전기설비학회논문지
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• 제17권6호
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• pp.138-146
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• 2003

본 논문에서는 직접적인 방법으로는 산불로 인한 전선의 열화특성을 분석하기 어려우므로 인공화염장치를 이용하여 건전 전선을 일정 시간 간격으로 화염을 가하는 실험을 하였다. 기계적 실험은 인장강도, 연신율 및 비틀림 수 실험을 수행하였다. 또한, 포항지역에 가설되어 운전 중이던 ACSR 480[$\textrm{mm}^2$]가 산불 열화로 인하여 철거된 전선을 수거하여 기계적 특성 시험 및 분석결과와 인공화염장치를 이용한 실험결과를 비교$.$분석하였다. 이 두 개의 분석 자료를 이용하여 향후 산불에 의해 열화된 전선의 상태를 예측할 수 있는 데이터베이스를 만들고, 또한 산불로 인한 ACSR 전선의 수명 진단에 필요한 자료를 제공하고자 한다.

• 한국주거학회논문집
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• 제16권2호
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• pp.83-90
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• 2005

A goal of this research is to propose the remodeling possibility from deteriorated stock apartment housing, to three generation family living in a dwelling unit for low incomes. An apartment housing which was built from 1970s, is accumulated over $55\%$ of the stock housing in Korea, many of them are confront with a rebuilding in a short usage of twenty years below. They are small one, and many of the residence complain narrow and small space compare to economic growth and their needs. This article deals the reform of two to one dwelling units, that it can be use for three generation family living as a new residence, because its spatial character is more controled privacy condition as a four bay spatial organization in the dwelling. The reform simulated in a 10, 13, 14, 15, and 16 pyung, the remodeling size became from 20 to 30 pyung, and its reform can be apply to extend life cycle of a stock confront with redevelopment. The possibility of the reform houses have more intensive privacy in a house compare with same area of new apartment. It tells us that we can recycle the deteriorate apartment house into three generation family living use, and it will be clue to change slum clearance into reform and recycle of deteriorate apartment house.

• 조명전기설비학회논문지
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• 제17권6호
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• pp.173-180
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• 2003

본 논문은 산불 화염에 의한 ACSR 송전선의 열화특성을 분석하기 위하여 인공화염장치를 이용하여 건전 전선을 일정 시간 간격으로 화염을 가하는 실험을 하였다. 이 때 발생되어지는 표면 특성을 확인하였다. 표면 특성 실험은 금속현미경으로 표면 특성을 확인하였다. 또한, 포항지역에 가설되어 운전 중이던 ACSR 480[$\textrm{mm}^2$]가 산불 열화로 인하여 철거된 전선을 수거하여 표면 특성 시험 및 분석 결과와 인공화염장치를 이용한 실험 결과를 비교$.$분석하였다. 이 두 개의 분석자료를 이용하여 향후 산불에 의해 열화된 전선의 상태를 예측할 수 있는 데이터베이스를 만들고, 또한 산불로 인한 ACSR 전선의 수명 진단에 필요한 자료를 제공하고자 한다.

• 동력기계공학회지
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• 제15권4호
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• pp.19-24
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• 2011

The operational efficiency of domestic gas turbine is about 25% and it is now in the trend of the gradual growth in spite of the severe temperature, frequent starting and shutdown according to the environmental management and the energy-efficient use. Rotor bolts of gas turbine in power plants have been the cause of defects because these gas turbines have been operated for a long time under the high pressure and temperature environment experiencing the aging change and stress concentration of the bonded part. The connection parts of the bolt revealed various failure shape and these parts were elongated under very low pressure when operated in the relaxed condition. The cause is in the lack of the metal distribution in the bottle lack area and the cap screw of the bolt is broken totally in case that the nut is fastened in most cases. Gas turbine rotor bolts are connected to the rotor wheel and these bolts caused the vibration, the bulk accident of the rotor in the event that the coupling power among these bolts was relaxed. Therefore, we would like to evaluate the soundness of the main part of the gas turbine rotor bolt through the measurement of the inner condition change along with the mechanic deterioration and temperature, stress in the gas turbine rotor material.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2009년도 춘계 종합학술대회 논문집
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• pp.967-972
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• 2009

현재의 도시재개발은 여러 가지 문제를 파생하고 있다. 특히 이전 거주민의 흔적과 지역적 특성이 무시된 채 획일적으로 진행되는 고층 아파트 단지 위주의 재개발은 전국 어느 도시나 비슷한 모습으로 나타나고 있는 실정이다. 열악한 주거권을 개선하는 올바른 방식의 재개발이 앞으로 계속되어야 한다면 지금의 재개발의 문제점을 극복하는 새로운 도시디자인의 형태가 필요하다 할 것이다. 이를 위해서 재개발 예정지의 보존 발전할 문화적 생태적 요소를 발견하고 이를 디자인 할 필요가 있다. 이 논문은 문화 생태적 요소를 잘 살린 국 내외 도시 디자인 사례를 연구하고 부산의 노후지역중 하나인 화명동을 문화 생태적 관점으로 디자인할 것을 제안한다.

• 한국주거학회논문집
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• 제16권5호
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• pp.67-74
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• 2005

The performance of building should be deteriorated with time while the building would maintain and manage the function and performance to get a living condition. For the efficient maintenance of the building, the repair cycle would be provided and applied during the service-life time. The service-life time of the building components would be needed to determine the repair time and the repair scope. The service-life time of the building components would be calculated with the 1st repair time and the recovery rate of the performance, considering the recovery rate after repaired. In this paper, the 1st repair time would be estimated with the normal probability distribution, choice probability and 3rd quadratic function. The recovery rate of the building components assumes various level according to the research target and utility area. The results of this study are as follows ; first, most of the components of the building work would range about 30 years in the service-life time and the components of the mechanical works range from 28 years to 37 years, those of the electrical works would be about 31 years.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2008년 추계학술발표대회 논문집
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• pp.385-390
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• 2008

The residence plan of Korea has been formed with bias for quantitative growth and uniformity failing at obtaining human value. Also, rapid growth brought about severe problems of deteriorated human life and destruction of environment. The solution for these problems is pursued in many directions, but there is short of active plan yet. The residence shall develop into new direction to satisfy the demand by reflecting society and culture as well as residents. This study examines external design with symbolic representation of regional feature as an alternative for uniform residence environment problem. This study will be a basic data upon suggesting the direction for planning high quality residence environment. This study examined the elements which form external space of residence complex, designed plan for external space of residence complex, and examined how to reflect regional feature which is important element of local community and culture on the space plan for residence complex based on the evaluation by local residents centered on Gimcheon-si, Gyeongbuk which just started local specialty by fostering. 'Special Area for Grape Industry.'

• Smart Structures and Systems
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• 제4권2호
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• pp.195-208
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• 2008

This paper summarizes the experimental vibration-based structural health monitoring study on a historical monument in Jordan. In this work, and within the framework of the European Commission funded project "wide-Range Non-Intrusive Devices Toward Conservation of Historical Monuments in the Mediterranean Area", a seven and a half century old minaret located in Ajloun (73 km north of the capital Amman) is studied. Because of their cultural value, touristic importance and the desire to preserve them for the future, only non-destructive tests were allowed for the experimental investigation of such heritage structures. Therefore, after dimensional measurements and determination of the current state of damage in the selected monument, ambient vibration tests are conducted to measure the accelerations at strategic locations of the system. Output-only modal identification technique is applied to extract the modal parameters such as natural frequencies and mode shapes. A Non-linear version of SAP 2000 computer program is used to develop a three-dimensional finite element model of the minaret. The developed numerical model is then updated according to the modal parameters obtained experimentally by the ambient-vibration test-results and the measured characteristics of old stone and deteriorated mortar. Moreover, a parametric identification method using the N4Sid state space model is employed to model the dynamic behavior of the minaret and to build up a robust, immune and noise tolerant model.