• Earthquakes and Structures
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• 제6권5호
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• pp.457-472
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• 2014

The paper presents the field investigations and seismic analyses of a historical masonry brick minaret damaged during October 23 (Erciş) and November 9 (Edremit), 2011 Van earthquakes in Turkey. Ulu Mosque Minaret located on Tebriz Kap1 Street in the city centre of Van, Turkey is selected for investigation. Two earthquakes hit the minaret within seventeen days, causing progressive damage. It was seen from the field investigations that the minaret was heavily damaged. To validate the field investigations, three dimensional finite element model of the minaret is constituted by ANSYS software using relievo drawings. Finite element model of the minaret is analyzed under the Van earthquake records to determine the seismic behavior. The displacements, maximum and minimum principal stresses and strains are obtained from the analyses and compared with field observations.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1998년도 가을 학술발표회 논문집
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• pp.89-96
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• 1998

• International Journal of Naval Architecture and Ocean Engineering
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• 제2권1호
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• pp.34-38
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• 2010

Field investigations have been carried out in two 60-day stages on the surf beat low frequency waves in Anzali port, one of the main commercial ports in Iran, located in southwest coast of the Caspian Sea. The characteristics of significant water waves were measured at three metering stations in the sea, one at the entrance of the port and three in the basin. The measured data were inspected to investigate the surf beat negative effects on the tranquility of the port. Using field measurements and complementary numerical modeling, the response of the basin to the infra-gravity long waves was inspected for a range of wave frequencies. It was concluded that the water surface fluctuations in the port is strongly related to the incident wave period. The long waves with periods of about 45s were recognized as the worst cases for water surfaceperturbation in the port. For wave periods higher than the mentioned range, the order of fluctuation was generally low.

• Earthquakes and Structures
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• 제17권4호
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• pp.355-363
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• 2019

Masonry structures in the rural areas of Turkey often damaged due to moderate and big earthquakes. After every earthquake many scientists made field investigations on the earthquake performance of these structures and gave many useful information on construction techniques. However, the newly constructed masonry buildings are still not suitable for the suggested techniques, and they are still in danger against future earthquakes. Five moderate earthquakes of moment magnitude Mw 5.3, 5.3, 5.2, 5.0, and 5.3 struck the Ayvacik-Çanakkale District of Turkey between 6 and 12 February, 2017. More than a thousand of aftershocks were occurred and most of the masonry buildings in the villages nearby main shock epicenter were affected. The author went to the earthquake field and investigated the earthquake performances of masonry structures. This paper presents the recorded acceleration data, acceleration response spectra, and the seismological aspects of these earthquakes. Besides, case studies of damaged stone masonry buildings, and failure mechanisms are discussed with illustrated photos which were taken during the field investigations. It is concluded that the damaged masonry buildings were not designed and constructed properly in accordance with the Turkish building codes or similar specifications.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제29권1호
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• pp.43-51
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• 2023

Purpose: To accommodate the increasing number of patients during the COVID-19 pandemic, numerous portable HEPA filter units (PHUs) were installed in the general wards of existing medical facilities(EMFs) to convert them into emergency conversion facilities (ECFs). The purpose of this study was to build a dataset in preparation for emerging infectious diseases in the post-COVID-19 era by analyzing the construction and operation of ECFs. Methods: Field investigations were conducted during ECF operation periods based on the analysis of heating, ventilation, and air conditioning (HAVC) system design documents for six ECFs across Korea. Interviews were conducted with facility managers during the field investigations. Results: When constructing an ECF within an EMF, the installation status and characteristics of the existing system should be considered. Field investigations and verifications of the operation of HAVC systems must be conducted beforehand for smooth ECF operations. If heating and cooling are required with indoor air circulation type equipment in an ECF zone, the implementation of a heating and cooling method that can satisfy the comfort requirements of the occupants while minimizing cross-contamination is essential. When using PHUs that do not meet the performance standards required by medical equipment, the noise level resulting from such equipment operation must be evaluated and improved. Implications: For EMFs, various guidelines that can be referred to for the construction and operation of ECFs must be developed to prepare for emerging infectious diseases in the future.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 1998년도 공동 심포지엄 및 추계학술발표회
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• pp.32-37
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• 1998

In this paper, the role of intermediate cover soils with respect to the leachate and gas flow is investigated from various field investigations and the hydraulic conductivity of the disposed waste is obtained using pumping and slug tests. From the results of field investigations, it was found that the flow of leachate and gas is prevented by the buried cover soils. The hydraulic conductivities of field pumping test and slug tests are well matched and stayed in the range of hydraulic conductivities of well compacted wastes in the literature.

• 융합보안논문지
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• 제12권5호
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• pp.15-22
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• 2012

이 연구는 미국에서의 경찰과 민간경비의 파트너쉽에 관하여 범죄통제 및 손실예방 분야에서 사례중심으로 고찰하였다. 주요 사례는 현장운영에서 사업개선지구에서의 사례들과, 특별한 행사안전 및 경비, 지역사회경찰활동에서의 다양한 파트너쉽 사례 그리고 기계경비분야에서의 경보에 대처하는 경찰과 민간경비의 파트너쉽, 범죄수사에서의 상호간 파트너쉽, 컴퓨터범죄 및 금융범죄 수사에서의 사례 등을 대상으로 제시하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.785-789
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• 2009

It is essential to carry out appropriate site investigations for the accurate prediction of the geo-structure. However, the importance of the site investigation is often overlooked due to the time and expense constraints. In this study, several cases of geotechnical design perfromed in United States are introduced with the lessons about how the site investigations are planned, performed and applied for the actual design parameter determination. Based on the case studies presented herein, experienced geotechnical engineer should participate in site investigations from the planning stage through the final boring logs and utilize all the laboratory and field tests to have consistent input parameters for the soil constitutive models. Furthermore, it is also desired to have close relationship between construction industry and the academia to compensate their needs.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1998년도 토목섬유 학술발표회 논문집
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• pp.73-84
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• 1998

• 대한공간정보학회지
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• 제19권3호
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• pp.91-98
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• 2011

도로표지는 운전자에게 안전하고 편안하게 목적지까지 안내를 목적으로 하는 교통시설이다. 도로표지는 신규노선이나 노선의 변경 그리고 도로표지의 노후화 등에 의해 지속적으로 현지조사와 이를 데이터베이스화하는 노력이 필요하다. 본 연구에서는 이러한 도로표지의 현지조사와 데이터베이스 구축을 효율적으로 수행할 수 있는 방안을 제시하는 것을 목적으로 하였다. 이를 위해 현지조사를 위한 모바일 매핑시스템을 설계하였다. 설계된 모바일매핑 시스템은 도로표지 영상정보를 획득할 수 있는 3대의 카메라, 차량의 위치와 자세를 알 수 있는 GPS/IMU/DMI, 그리고 도로표지 지점위치와 노선정보를 획득할 수 있는 레이저스캐너로 구성하였다. 또한 도로표지 영상에서 자동으로 도로표지 영역을 검출하고 이로부터 문자인식을 수행하는 절차를 제시하였다.