[기획보도 부문_제129회 이달의 방송기자상] 비자 정책의 허점 파고든 ‘검은 커넥션’ : 〈베트남 한국 비자 불법 발급 실태 연속보도〉 2019년 6월 10일~11일, 25일 보도_SBS · SBS A&T 강민우, 김용우 기자

강민우 (사)방송기자연합회 2019 방송기자 Vol.50 No.-

논토양 내 비소 불용화에 대한 안정화물질의 처리 효과

강민우,오세진,김성철,이상수 한국환경농학회 2019 한국환경농학회지 Vol.38 No.1

BACKGROUND: Soil contamination of As is a very sensitive environmental issue due to its adverse impact on human health and different characteristics with other heavy metals. With public awareness of As poisoning, there has been growing interest in developing guideline and remediation technologies for As-contaminated soil. The objective of this research was to evaluate the effectiveness of stabilizing amendments and soil dressing methods on the mobility of As in the contaminated rice paddy soils nearby mining area. METHODS AND RESULTS: Different amendments were mixed with surface and subsurface contaminated soils at a ratio of 3% (w/w) and monitored for five months. Three different extractants including 0.01M CaCl2, TCLP, and PBET were used to examine As bioavailability in the soil and the concentration of As in rice grain was also measured with an inductively coupled plasma (ICP) spectroscopy. The results showed that all amendment treatments decreased As concentration compared to the control. Especially, coal mine drainage sludge (CMDS) treatment showed the highest efficiency of decreasing As concentration in the soil and rice grain. The values of Pearson correlation (r) between As concentrations in the soil and rice grain were 0.782, 0.753, and 0.678 for CaCl2, TCLP, and PBET methods, respectively. Especially, CaCl2 method was highly correlated between As concentrations of the soil and soil solution (r=0.719), followed by TCLP (r=0.706), PBET (r=0.561) methods. CONCLUSION: Stabilizing amendments can effectively reduce available As concentration in the soils as well as soil solution, and thereby potentially mitigating risks of crop contamination by As.

Thermally conductive, electromagnetic wave shielding and absorbing behaviors of CNT/Ag NWs/ZnO nanocomposites

강민우,이연진,김상우 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1

Conventional conductive polymer nanocomposites are hard to improve radiation efficiency of heat, electromagnetic interference (EMI) shielding and absorbing performance simultaneously. We fabricated multifunctional nanocomposites using polymer matrix containing silver NWs, multiwalled carbon nanotubes (MWCNT), and zinc oxide (ZnO). Fabricated multifunctional nanocomposites showed a unique combination of high thermal conductivity, and high electromagnetic interference (EMI) shielding and absorbing effectiveness that far exceeds those of conventional conductive polymer nanocomposites. These results show that it is useful in electronic applications that require electromagnetic shielding, absorbing and heat radiating effects at the same time.

SCM440의 오스테나이트화 거동에 미치는 초기 조직의 영향 (초)

강민우,이영국 대한금속재료학회 2009 대한금속재료학회 학술대회 개요집 Vol.2009 No.-

cBN 입자상 강화재 첨가에 따른 중성자 흡수용 B4C/Al 복합재의 열전도도 변화 연구

강민우,이동현,이태규,김정환,이상복,권한상,조승찬 한국복합재료학회 2023 Composites research Vol.36 No.6

본 연구에서는 기존 사용후핵연료 운송/저장 용기에 사용되는 중성자 흡수용 B4C/Al 복합소재의 열전도도를 개선하기 위해 탄화붕소(B4C)와 입방정 질화붕소(cBN)를 동시에 강화재로 사용한 알루미늄(Al) 기지 복합소재를 제조 평가하였다. 이를 위해서 교반주조 공정을 통해 복합재 잉곳을 제조하고 이를 압연하여 실용이 가능한 중성자 흡수용 소재를 성공적으로 제조하였다. 제조된 소재의 평가를 위해 cBN 첨가에 따른 열전도도와 중성자 흡수능 변화를 관찰하였다. 열전도도 측정 결과, B4C 단일 입자만을 사용한 복합소재 대비 B4C, cBN을 함께 사용한 복합소재가 동일 체적율 조건 하에서 약 3%의 열전도도 증가가 발생하는 것을 확인하였으며 중성자 흡수 단면적 계산을 통해 중성자 흡수능이 무시할 수 있는 수준으로 저하가 발생하는 것을 확인하였다. 본 연구의 결과를 바탕으로, 중성자 흡수 소재의 새로운 설계 방안을 제시하고 고성능 운송/저장 용기의 개발에 기여할 수 있을 것으로 기대된다. This study aimed to enhance the thermal conductivity of B4C/Al composite materials, commonly used in transport/storage containers for spent nuclear fuel, by incorporating both boron carbide (B4C) and cubic boron nitride(cBN) as reinforcing agents in an aluminum (Al) matrix. The composite materials were successfully manufactured through a stir casting process and practical neutron-absorbing materials were obtained by rolling the fabricated composite ingot. The evaluation of the thermal conductivity of the fabricated composites was carried out because thermal conductivity is critical for neutron absorbing materials. The thermal conductivity measurement results indicated an approximately 3% increase in thermal conductivity under the same volume fraction when compared to composite materials using only B4C particles. Through neutron absorption cross-sectional area calculations, it was confirmed that the neutron absorption capability decreased to a negligible level. Based on the findings of this study, new design approaches for neutron absorption materials are proposed, contributing to the development of high-performance transport/storage containers.

모바일 매니퓰레이터의 엘리베이터 조작을 위한 HRI 시스템 구현

강민우,김태현,서현욱,김동한 제어·로봇·시스템학회 2022 제어·로봇·시스템학회 논문지 Vol.28 No.8

Unlike conventional industrial robots that operate in a limited manufacturing environment, service robots should be able to operate in various environments. Where there are many complex high-rise buildings, service robots require the ability to ride and control elevators. Furthermore, a human-robot interaction (HRI) approach is critical because service robots have the characteristics of interacting directly with humans. Therefore, this paper proposes an HRI system that enables direct elevator button manipulation to enable mobile manipulator robots to perform tasks in various high-rise building environments. The system is divided into three subsystems: elevator button recognition, command reception through voice recognition, and elevator button operation. Elevator button recognition and command reception through voice recognition receive the required topics and communicate with the lower end of the elevator button operation. Although the three distinct substructures interact with each other and are independent, they can be replaced by different algorithms at any time. Because of the same characteristics, the system can be applied to various mobile manipulators with different specifications. The experiment proceeds with pressing the button on floors B1-4 through voice recognition in a simulation environment and pressing the button on floors 5-7 without voice recognition. The experimental results compared the central positions of the button and end effector’s x, y, and z coordinates after control. The system, verified through simulation, has since been applied to real robots. .

2019년 해외 우수 CP 연수단 후기

강민우 전략물자관리원 2019 전략물자 focus Vol.- No.21

한국 자본시장의 주식프리미엄과 위험회피계수 추정

강민우 한국응용경제학회 2008 응용경제 Vol.10 No.3

This study examines the existence of equity premium in the Korean stock market and derives the coefficient of relative risk aversion using the consumption based capital asset pricing model(CCAPM), focusing on period of last 20 years. The findings are that there exists equity premium in the Korean stock market but the amount has been lower than that of financially advanced countries. Moreover, the coefficient of relative risk aversion is found to be lower than a theoretical value and thus the equity premium puzzle is not observed in the Korean stock market unlike in advanced countries. Based on these findings, it seems that the Kotean stock market has been undervalued and low risk aversion reflects that compensation of risk taking have not played a significant role in financial investment in the Korean stock market. As the financial depth of Korea market increases further, however, the Korean stock market might not be free from the discussion of equity premium puzzle. 본 연구에서는 한국 주식시장에서의 주식프리미엄의 실재여부를 확인하고 소비근거 자본자산가격결정모형(CCAPM)으로부터 1987년 이후 2008년 현재까지(1987.1~2008.3) 분기별 데이터를 이용해 위험회피계수를 추정하였다. 그 결과 한국 주식시장의 주식프리미엄은 존재하나 주요 선진국에서 관측되는 수준에 미달하며, 추정된 위험회피계수 역시 이론상 적정범위보다 작은 것으로 나타나 선진국 시장에서 보편적으로 발견되는 주식프리미엄 퍼즐 현상이 한국 주식시장에서는 관측되지 않는 것으로 확인되었다. 또한, 주식수익률과 소비간 공분산과 함께 추정된 위험회피계수의 값이 외환위기 이후 상승한 것으로 나타나 투자자들의 위험자산에 대한 평가가 외환위기 이전에 비해 더 실질적으로 반영되고 있음을 확인하였다.

고속도로와 일반국도의 교통정보연계에 따른 우회 교통량 분석

강민우,윤부영,김성현 한국ITS학회 2015 한국ITS학회 학술대회 Vol.2015 No.04

공동주택 엘리베이터 소음에 관한 주민의식 조사

강민우,오양기 대한건축학회지회연합회 2017 대한건축학회연합논문집 Vol.19 No.6

The noise problem of apartment houses has been increased continuously. As a result of complaints about on noise, the leading complaints is heavy weight floor impact noise, followed by balcony drainage noise and elevator noise. It is investigated how residents in the apartment hear, recognize and response on elevator noise. a survey on elevator noise to residents of apartment. The survey was carried out by dividing into several items in order to obtain information on the noise reduction and the vibration reduction method of the building elevator. It is found that most importantly, more than half of the residents responding to the questionnaire recognize the necessity to establish standards for noise. Based on the results of this study, the statistical meaningful analysis should be made by adding actual data. The results of this study are expected to be a good indicator for future architectural reduction of elevator noise.