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- 저자 : 김태훈(Taehoon Kim) (검색결과 541 건)
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김태훈,김영현,조규만,Kim, Taehoon,Kim, Young Hyun,Cho, Kyuman 한국건축시공학회 2021 한국건축시공학회지 Vol.21 No.2
While the scale of the domestic market for demolition work is steadily increasing, research on cost prediction for demolition work is insufficient. Thus, this study proposes a cost prediction model for demolition work that reflects various attributes influecing the fluctuation of demolition cost. 13 influencing factors and historical cost data were collected based on literature review and experts' advice, and two prediction models were constructed through regression analysis and the prediction accuracy was evaluated. As a result, it showed an average error rate of about 6 to 12%, and it was possible to explore the possibility of use as a reliable prediction model. The results of this study can contribute to estimating appropriate construction cost and improving related standards for domestic demolition works in the future.
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김태훈,조상욱,박찬식,이학근,김두인,정명영,Kim, Taehoon,Cho, Sang Uk,Park, Chan Sik,Lee, Hak-Guen,Kim, Doo-In,Jeong, Myung Yung 한국마이크로전자및패키징학회 2016 마이크로전자 및 패키징학회지 Vol.23 No.3
In this paper, we introduced a near infrared fluorescence imaging system that has long working distance and analyzed on the effects of measurement variables such as gain, exposure time, working distance, magnification. Fluorescence signal intensity is growing up according to exposure time and magnification increasing, and it is getting stronger according to increase of gain, but the background signal intensity is getting stronger together. It causes low SBR. Due to a laser irradiation method, laser intensity distribution of the introduced system is not uniform and it makes fluorescence signal weak. So, we proposed a solution.
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대역통과필터의 기울임에 따른 형광 이미징 시스템 특성 분석 연구
김태훈,조상욱,박찬식,이학근,김두인,정명영,Kim, Taehoon,Cho, Sang Uk,Park, Chan Sik,Lee, Hak-Guen,Kim, Doo-In,Jeong, Myung Yung 한국마이크로전자및패키징학회 2016 마이크로전자 및 패키징학회지 Vol.23 No.2
In this paper, we studied effects of tilting angle of band pass filter on the characteristics of fluorescence imaging system. Theoretical modeling showed that transmittance and filtering range are highly dependent on the tilting angle. Measurements on transmittance as a function of wavelength confirmed that changes in transmittance and the band filter range are in good agreement with theoretical prediction. Therefore, characteristics of band pass filter can be precisely tuned by altering tilting angle of band pass filter in order to enhance fluorescence signal in bio imaging system.
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셀룰라 IoT 네트워크를 위한 파일럿 지원 기회적 전송 기반 임의 접속 기법
김태훈,채승호,Kim, Taehoon,Chae, Seong Ho 한국정보통신학회 2019 한국정보통신학회논문지 Vol.23 No.10
Recently, 5G cellular systems have been attracted great attention as a key enabler for Industry 4.0. In this paper, we propose a novel random access based on pilot-assisted opportunistic transmission to support internet-of-things (IoT) scenario in cellular networks. A key feature of our proposed scheme is to enable each of IoT devices to attempt opportunistic transmission of its data packet in Step 3 with randomly selected uplink pilot signal. Both the opportunistic transmission and the pilot randomization in Step 3 are effective to significantly mitigate the occurrence of packet collisions. We mathematically analyze our proposed scheme in terms of packet collision probability and uplink resource efficiency. Through simulations, we verify the validity of our analysis and evaluate the performance of our proposed scheme. Numerical results show that our proposed scheme outperforms other competitive schemes.
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실내 환경에서 위치 인식율을 고려한 AP 배치 기법의 모델링 및 성능 평가
김태훈,탁성우,Kim, Taehoon,Tak, Sungwoo 한국정보통신학회 2013 한국정보통신학회논문지 Vol.17 No.4
본 논문에서는 실내 환경에서 위치 인식을 고려한 AP 배치 기법을 제안하고 성능평가를 수행하였다. 제안한 기법은 위치 인식율과 AP 기반 무선 네트워크의 성능 및 비용을 고려하여 근사 최적 AP 구성 형태를 생성하는 메타휴리스틱 알고리즘과 AP 배치 과정을 빠르게 수렴하게 하는 결정론적 알고리즘으로 구성된다. 실내 공간과 유사한 시뮬레이션 환경을 구축하여 제안한 AP 배치 기법의 성능 평가를 수행하였으며, 제안한 기법은 빠른 시간 내에 우수한 결과를 생성하였다.
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환상지방족 Isocyanate(H<sub>12</sub>MDI)와 n-Hexanol의 반응속도론
김태훈,박성엽,박성훈,Kim, Taehoon,park, Sungyurb,Park, Sunghoon 한국공업화학회 1998 공업화학 Vol.9 No.7
Reaction kinetics between 4,4'-dihexyl methane diisocyanate($H_{12}MDI$) and n-hexanol in toluene with dibutyltin dilaurate(DBTDL) as catalyst was studied by experimental measurements and mathematical modeling. Experiments were carried out at various temperatures, catalyst concentrations and [NCO]/[OH] ratios, and the reaction kinetics were described by two second-order reactions, the one between NCO and OH leading to urethane and the other between urethane and NCO leading to allophanate. The rate constants were estimated by the Runge-Kutta 4th-order method. Experiments and mathematical simulations showed a good agreement for various experimental conditions. The [allophanate]/[urethane] ratios at 90% conversion of initial NCO were estimated to be over 20% for most conditions employed in the present study, indicating that allophanate formation might significantly affect the properties of urethane polymers.
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태양광 조명 시스템의 집광 효율 향상을 위한 정렬 및 패키징 기술
김태훈,신병한,정명영,Kim, Taehoon,Sheen, Byung-Han,Jeong, Myung Yung 한국마이크로전자및패키징학회 2014 마이크로전자 및 패키징학회지 Vol.21 No.3
In this work, we investigated the efficiency improvement of concave mirror based solar daylighting system that does not convert light to electricity. Total efficiency of the system is substantially affected by external environment and focusing position, alignment of reflectors, lenses. As a result of simulation, we obtained the max. efficiency in which depends on convex lens position.
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김태훈,이길준,손진호,Kim, Taehoon,Lee, GilJoon,Sohn, Jin Ho 대한후두음성언어의학회 2017 대한후두음성언어의학회지 Vol.28 No.2
Sarcomatoid carcinomas are biphasic tumors which have surface epithelial changes and an underlying spindle-shaped neoplastic proliferation. A 62-year-old male with hoarseness came to our hospital for evaluation. A single smooth polypoid lesion was detected on his right true vocal fold by larnygoscope. The patient was diagnosed with vocal polyp and treated with surgical excision. Pathology report of the excised specimen was compatible with sarcomatoid carcinoma. Therefore, further surgical resection was performed to secure safety margins. We report a case of a sarcomatoid carcinoma patient who was clinically diagnosed as vocal polyp.
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김태훈,정진섭,Kim, Taehoon,Jeong, Jinseob 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.6
For performance improving of C-band radar altimeter used in a missile system, Ku-band radar altimeter is developed. To utilize the time delay devices which are used in testing C-band radar altimeter, we proposed C-band and Ku-band frequency conversion method and implemented it as a part of missile system test equipment. In this paper we present design contents, development results and test application results of radar altimeter test equipments.
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