고층 건축공사의 시공성 향상을 위한 설계단계의 시공엔지니어링 업무 도출 - 가설공사를 중심으로 -

이진웅,조규만,김태훈,Lee, Jin-Woong,Cho, Kyu-Man,Kim, Tae-Hoon 한국건축시공학회 2017 한국건축시공학회지 Vol.17 No.5

건물의 고층화와 규모의 증가로 인해 프로젝트 설계단계에서의 시공성을 반영한 엔지니어링 기술의 중요성이 점점 커지고 있다. 특히, 설계단계에서의 가설작업을 위한 설비, 장비 및 공법과 관련된 엔지니어링 기술적용의 노력은 시공성 및 프로젝트 성과 향상에 크게 기여할 수 있다. 이에 본 연구에서는 고층 건축공사의 시공성 향상을 위하여 가설공사를 중심으로 설계단계에 요구되는 시공엔지니어링 업무를 도출하고자 하였다. 우선, 문헌고찰과 전문가 집단면접을 통해 27개의 예비 업무를 도출하였으며, 그 후 설문조사를 통하여 각 업무의 필요성 및 중요도를 분석하였다. 분석 결과, 골조공사 및 양중장비 계획과 관련된 대부분의 업무가 상대적으로 중요한 것으로 분석되었다. 마지막으로 요인분석을 통해 21개의 엔지니어링 업무를 선정하였으며, 이들 업무는 크게 1)골조공사 및 측량/동선계획, 2)양중 및 콘크리트 압송계획, 3)공간구획계획, 4)용수계획, 5)가설건물 및 전력/조명계획의 5개 요인으로 분류되었다. 본 연구의 결과는 설계단계에서 시공엔지니어링 업무를 효과적으로 반영할 수 있는 프로세스 수립을 위한 기초 자료로 활용될 수 있을 것이다.

단 방향 단일모드 발진 반도체 사각 링 공진기의 광 특성 연구

이진웅,이정우,김영훈,현경숙,Lee, Jin-Woong,Lee, Jung-Woo,Kim, Young-Hoon,Hyun, Kyung-Sook 한국광학회 2016 한국광학회지 Vol.27 No.5

We report on the parameter-dependent optical characteristics of the unidirectional single-mode lasing square ring cavities. Using the taper-step section in the square cavities, the resonant direction can be selected and we characterize the optical losses by changing the taper lengths. Various kinds of square ring cavities are fabricated, based on InGaAsP/InGaAs multiple quantum well semiconductor materials. From the experimental results we obtain the optimized taper length for a given device structure, while maintaining unidirectional single-mode lasing.

광 결정 구조 변수에 따른 고출력 단일모드 수직공진 표면발광 레이저의 발진 특성

이진웅,현경숙,신현의,김희대,Lee, Jin-Woong,Hyun, Kyung-Sook,Shin, Hyun-Ee,Kim, Hee-Dae 한국광학회 2009 한국광학회지 Vol.20 No.6

The high power and single mode vertical cavity surface emitting laser(VCSEL)s with photonic crystal structures have been proposed and fabricated by reducing substantially the hole numbers used in the photonic crystal structures. It is found that only six holes enable VCSELs to operate a single mode and the reliability can be enhanced by filling the holes with polyimide. The single mode lasing characteristics were analyzed by varying the oxide aperture and the hole diameter in photonic crystal structures. As a result, the single mode lasing can be stably obtained in the photonic crystal vertical cavity surface emitting lasers.

건설 자동화 시스템의 적정 유형 및 핵심요소기술 분석

이진웅 ( Lee Jin Woong ),조규만 ( Cho Kyuman ),김태훈 ( Kim Taehoon ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2

Dynamic nature and diverse requirements on construction sites make the automation technology harder to be employed actively. In this study, we analyzed optimal type of automation system and importance of core technologies for developing efficient construction automation system on 11 construction operations. As a result, it showed that man-machine cooperation system may be the most suitable for most operations, while autonomous robot will be best suited in hard working environment such as maintenance of exterior wall. In elemental technology, ease and accuracy of control and operation showed higher priority than others regardless of automation system type. These findings will provide useful information for developing the construction automation system.

IPA를 활용한 건축시공 자동화 기술개발 우선순위 분석

이진웅 ( Jin Woong Lee ),조규만 ( Kyuman Cho ),김태훈 ( Taehoon Kim ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.1

Domestic construction industry has trouble in ensuring competitiveness by aging of skilled labors and lack of innovation in construction technologies. Under the current circumstances, the construction automation technology becomes an useful alternative for enhancing competitiveness through productivity, quality and safety improvement. Thus, this study analyzes the priority in developing construction automation technology using IPA technique. The results show that repetitive and heavy material-included activities have high priority, and will be used as preliminary data for establishing reasonable target and range of construction automation.

차축의 중량 분포와 타이어의 공기압이 트랙터 작업의 연료 효율에 미치는 영향

이진웅 ( Jin Woong Lee ),김경욱 ( Kyeong Uk Kim ),김동현 ( Dong Hyeon Gim ),최규정 ( Kyu Jeong Choi ) 한국농업기계학회 2011 바이오시스템공학 Vol.36 No.5

This study was conducted to investigate the effects of axle weight distribution and inflation pressure of tire on the fuel economy of tractors as well as operational range of tractor engine in terms of engine speed and power when a 4WD tractor of 38.2 kW rated power at 2500 rpm is used for plowing and flooded-field rotavating in paddy fields. (1) Plowing operation required an average engine power of 9.6~13.5 kW which equals 25~35% of rated PTO power. Engine speed ranged from 1,320.4 to 1,737.4 rpm, work velocity from 3.4 to 4.8 km/h, and fuel consumption from 3.2 to 4.2 L/h, respectively. (2) Flooded-field rotavating required an average engine power of 11.5~18.5 kW which equals 30~48.4% of rated PTO power. Out of this 6.2~12.2 kW was used for PTO power. Engine speed ranged from 1,557 to 2,067 rpm, work velocity from 2.5~5.4 km/h and fuel consumption from 3.2~5.5 L/h, respectively. (3) Axle weight distribution, inflation pressure of tire and moisture content of soil did not affect significantly the specific volumetric fuel consumption but affected significantly the fuel consumption per unit area of operation. Fuel savings amounted to 65% in plowing operation and 20% in flooded-field rotavating when the axle weight distribution and inflation pressure of tire were optimally adjusted. (4) Optimal adjustment of axle weight distribution and inflation pressure of tire are expected to save fuel consumption by 10~65% per unit area of operation in plowing and 10~20% in flooded-field rotavating.

학교 정원을 활용한 생태교육 프로그램이 중학생들의 생태소양 함양에 미치는 효과

이진웅 ( Jin Woong Lee ),서민수 ( Min Su Seo ),정길우 ( Gill Woo Jeong ),김정희 ( Jeong Hui Kim ) 한국현장과학교육학회 2021 현장과학교육 Vol.15 No.4

As the ecological crisis awareness that today’s global ecosystem is facing an ecological crisis situation is spreading, the need for ecological education is being raised as an effort to recognize and overcome it. Therefore, in this study, the ecological education program using the school garden was developed by reorganizing the 「Bio-diversity」 section of the science curriculum to cultivate the ecological literacy of middle school students. By applying this to the class, the effect on the cultivation of ecological literacy of middle school students was analyzed. The study subjects were selected from three middle schools in large cities, and their ecological literacy was measured by dividing them into an experimental group in which classes were conducted through an ecological education program and a comparative group in which classes were conducted using instructional media in the classroom. In addition, satisfaction evaluation and semi- structured interview on the ecological education program were conducted. As a result of the study, the ecological knowledge that constitutes ecological literacy did not show any significant difference between groups. However, as for the ecological attitude constituting ecological literacy, the experimental group students showed higher ecological attitudes, strong ecocentrism and weak anthropocentrism than the comparative group students. Therefore, it is judged that the ecological education program had a positive effect on the cultivation of ecological literacy. Satisfaction evaluation results for the ecological education program showed high scores in all items, so it is judged that there is no shortage of ecological education program for cultivating ecological literacy. Meanwhile, the program was supplemented based on student interviews. The students who studied 「Biological Diversity」 in the school garden through the ecological education program were positively affected not only in the formation of ecological knowledge but also in the formation of ecological attitudes, thereby cultivating and promoting ecological literacy. Therefore, if the ecological education program using the school garden is applied to the middle school science curriculum, the ecological literacy of the students will be cultivated and promoted.

지리, 지양과 지향

이진웅(Jin-Woong Lee) 대한지리학회 2019 대한지리학회 학술대회논문집 Vol.2019 No.6

신규로 건설된 군 위댐 호내 어류 군집 및 생태적 특성에 관한 연구

이진웅 ( Jin Woong Lee ),윤주덕 ( Ju Duk Yoon ),김정희 ( Jeong Hui Kim ),박상현 ( Sang Hyeon Park ),백승호 ( Seung Ho Baek ),장광현 ( Kwang Hyeon Chang ),장민호 ( Min Ho Jang ) 한국수생태학회 2015 생태와 환경 Vol.48 No.4

To secure water resources, dams are normally constructed on the upper - middle part of streams, and it generates physical disturbances such as habitat alteration and stream fragmentation. Such construction can restrict movement of aquatic organisms, especially for freshwater fish which is one of top predator in aquatic ecosystem, and cause genetic fragmentation and community change. In this study, to investigate impact of habitat alteration after dam construction on freshwater fish, we monitored fish community changes, and compared fish fauna between dam reservoir and inflows. Additionally, movement characteristics and habitat boundaries of four species were identified by radio telemetry method. The study was conducted in the Gunwi Dam which was constructed in December 2010. Radio telemetry was applied to Pungtungia herzi, Zacco platypus (living lotic and lentic), Silurus asotus (lentic preferred species) and Zacco koreanus (lotic preferred species). The number of species was remarkably decreased (4 family, 10 species) comparing with before the dam construction (7 family, 15 species). Specifically, Coreoleuciscus splendidus, Niwaella multifasciata, Liobagrus mediadiposalis, Coreoperca herzi and Odontobutis platycephala that inhabit in the lotic environment were not collected in the study area. A total of 8 species were caught in both the dam reservoir and tributaries except 2 species (C. auratus and S. asotus). Sorenson``s similarity between the reservoir and its tributaries was high (0.842). All of the radio tagged species stayed in the reservoir except S. asotus which moved to the tributary. These species mainly utilized the shallow littoral zone as a habitat. These results could be useful as a baseline data for efficient management of fishes in lakes.

지능형 농기계를 위한 통합 소프트웨어 플랫폼 구조

이진웅 ( Jin-woong Lee ),박진감 ( Jin-kam Park ),변서정 ( Seo-jung Byeon ),박민규 ( Min-gyu Park ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

전자제어기술의 비약적인 발전에 따라 농업기계 분야에서도 기계적인 방법에 의해 동작하던 각종 장치들이 운전자의 편리성, 안정성, 효율성 등의 이유로 전기적인 방법에 의해 구동되고 있으며, 이에 따라 농업기계시스템은 점차 고도화, 첨단화, 지능화 되어 가고 있다. 이러한 농업기계의 변화에 맞춰 다양한 기능이 가능한 전자제어장치들이 늘어나고 있으며 이를 포함한 제어시스템 또한 복잡해져가고 있는 실정이다. 이러한 전자제어장치는 각종 차량에 장착 된 각종 센서, 사용자 조작 입력 및 통신(CAN)입력을 통해 현재의 상태를 판단하고 구동용 액추에이터 또는 정보를 출력하는 역할을 하며 이에 대한 작업은 제어기에 입력 된 소프트웨어에서 그 기능을 구현하고 있다. 이러한 소프트웨어의 경우 하드웨어와는 달리 무형적인 특징이 있어 신뢰성, 안정성 및 무결성 등을 검증하기 매우 어려운 특징을 지닌다. 그러나 각종 전자제어장치들의 증가는 이러한 소프트웨어의 안정성에 문제를 가져올 수 있는 가능성이 증가하는 것을 의미한다. 본 연구에서는 지능형 농기계의 다양한 기능을 지원하고 변속기, 작업기, 유압시스템 및 다양한 시스템에 활용할 수 있는 범용성을 지닌 소프트웨어 플랫폼 구조를 제안하도록 한다.