안개제거장치를 이용한 도심 저류지 시설에서의 안개 저감 효과 연구

이규홍,이상우,최준성,이성균,박지환,박승희,Lee, Kyu Hong,Lee, Sang Woo,Choi, Jun Sung,Lee, Sung Kyun,Park, Jihwan,Park, Seunghee 한국방재안전학회 2018 한국방재안전학회 논문집 Vol.11 No.2

환경적인 영향에 대해 민감하게 발생하는 안개는 특정 지역/시간대를 예측하기 어려워 시민의 안전에 대한 위험성을 가진다. 따라서 기존의 소극적이고 수동적인 대응방안이 아닌 건조공기와 음이온 응결핵을 통해 안개입자를 직접적으로 제거할 수 있는 안개제거장치를 이용한 백연성 안개 저감 기술을 제안하고자 한다. 이에 본 연구에서는 저류지 환경에서 자주 발생하는 백연성 안개에 대하여 안개제거장치를 이용한 저감 효과를 확인하고 기온 환경에 따른 영향성을 분석하고자 실험적 검증을 수행하였다. 동일한 환경 조건에서 100 m 거리에 위치한 표지판을 설치하여 가시거리를 비교하였다. 그 결과 30초 이내에 100 m 이상의 가시거리를 확보 가능하였으며 이것으로 안개저감효과가 효과적임을 확인할 수 있었다. 또한 기온 환경에 따라 온도가 낮을수록 백연성 안개가 크게 발생하였으나 기온 환경별 백연성 안개의 저감효과에 대한 영향성은 미미한 것을 확인하였다. 본 실험을 통해 안개제거장치를 이용하여 저류지환경에서 발생된 백연성 안개에 대한 저감 효과를 검증할 수 있었다. Fog to which environmental impacts are sensitive has a danger to the safety of citizens due to the difficulty in predicting the specific area/time zone. Therefore, we propose a white smoke fog reduction technique using a fog removal device that can remove fog particles directly through dry air and anionic condensation nucleus instead of conventional passive countermeasures. In this study, to verify the effect of reducing fog and the effect of temperature on the white smoke fog which is frequently occurred in the detention basin. As a result, the visible distance of 100m or more was secured within 30 seconds, and it was confirmed that the fog reduction effect is more effective. Also, the lower the temperature, the larger the amount of white smoke fog was. However, the effect of reducing the white smoke fog by temperature was insignificant. Through this experiment, it was possible to verify the reduction effect of the white smoke fog generated in the detention basin through fog removal device.

칼럼 - 틈새시장 개척

이규홍,Lee, Gyu-Hong 대한건축사협회 2012 建築士 Vol.2012 No.5

Suicidal Behaviors Among Public Community Healthcare Center Registrants: A Comparison of Mental and General Healthcare Center Registrants in Korea

이규홍,송후림,Su Young Lee,전태연,이해국,정종현,조선진 대한우울조울병학회 2020 우울조울병 Vol.18 No.3

Background: The study examined the prevalence of suicidal ideation and suicide attempts among registrants of public community healthcare centers and compared between the characteristics of mental and general healthcare center (GHC) registrants. Methods: The study measured lifetime suicidal behaviors, psychosocial variables, psychiatric comorbidities, and suicide related factors. Results: A total of 132 (73.7%) and 126 (42.3%) mental and GHC registrants, respectively, reported a history of suicidal ideation; whereas 64 (35.8%) and 29 (9.7%) of mental and GHC registrants, respectively, reported a history of suicidal attempts. Scores of the Beck Depression Inventory (BDI) for both suicidal ideation groups were above the severe level, although only 2% of GHC group recognized their diagnoses of depressive disorders. Conclusion: The study observed high suicidal risk among the mental and GHC registrants. High BDI scores and unevaluated depression under score the need for screening and provision of appropriate early interventions in public community healthcare centers.

Magnetic resonance imaging of macrophage activity in atherosclerotic plaques of apolipoprotein E-deficient mice by using polyethylene glycolated magnetic fluorescent silica-coated nanoparticles

이규홍,Hye-Young Moon,Cheongsoo Park,Ok Ran Kim,Eunjeong Ahn,Shin Young Lee,박효은,임상현,승기배,장기육,윤태종,이철현,정재준,홍관수 한국물리학회 2009 Current Applied Physics Vol.9 No.11

We have recently synthesized organic dye-incorporated silica-coated core–shell magnetic nanoparticles (MFSNs) that enable the detection of both fluorescence and magnetic properties in cells and tissues by using magnetic resonance imaging (MRI). Furthermore, polyethylene glycolation of the surface of these MFSNs would render them more stable and biocompatible, and thus allow their in vivo use as a circulating agent with a long half-life. Atherosclerotic vascular diseases are the leading cause of death worldwide. A noninvasive diagnostic imaging method is required to identify vulnerable plaques prior to the occurrence of a clinical event. Macrophages are the key cellular mediators in the pathogenesis of plaque inflammation and vulnerability. We evaluated whether the use of polyethylene glycolated (PEGylated) MFSNs could help in effectively detecting the macrophage activity in the aorta of apolipoprotein E (apoE)-deficient mice. PEGylated MFSNs (Fe, 30 mg/kg) were injected via the tail vein in 1.2% cholesterol- fed 30-week-old apoE-deficient mice. After 24 h, ex vivo MRI was carried out. The atheromas were then observed by confocal laser scanning microscopy (CLSM), and immunohistochemical staining targeted toward the macrophages was performed. Ex vivo MRI demonstrated robust enhancement of the atherosclerotic plaques along the aortic wall. CLSM images showed accumulation of PEGylated MFSNs in the atherosclerotic plaques, and histological examination revealed the localization of MFSNs in the macrophages present in the lesion. Therefore, PEGylated MFSNs could function as an effective multimodal imaging agent in the identification of macrophage activity in atherosclerotic plaques.

프리캐스트 아치교 말뚝기초 안정성 검토 사례

이규홍,김경남,전병암,최광수,Lee, Gyu-Hong,Kim, Gyeong-Nam,Jeon, Byeong-Am,Choe, Gwang-Su 한국지반공학회 2017 지반 : 한국지반공학회지 Vol.33 No.5

액상가압공정으로 제조된 탄탈륨 연속섬유 강화 비정질 복합재료의 미세조직과 기계적 성질

이규홍 ( Kyu Hong Lee ),이상복 ( Sang Bok Lee ),이상관 ( Sang Kwan Lee ),이성학 ( Sung Hak Lee ) 대한금속재료학회 ( 구 대한금속학회 ) 2008 대한금속·재료학회지 Vol.46 No.7

Zr-based amorphous alloy matrix composites reinforced with tantalum continuous fibers were fabricated by liquid pressing process, and their microstructures and mechanical properties were investigated. About 60 vol.% of tantalum fibers were homogeneously distributed inside the amorphous matrix, which contained a small amount of polygonal crystalline particles. The ductility of the tantalum-continuous-fiberreinforced composite under tensile or compressive loading was dramatically improved over that of the monolithic amorphous alloy, while maintaining high strength. The consequential observation of the tensile deformation and fracture behavior of the composite showed the formation of multiple shear bands and multiple necking, crack deflection in the amorphous matrix, and obstruction of crack propagation by ductile fibers, thereby resulting in very high tensile elongation of 7.2%. These findings suggested that the liquid pressing process was useful for the development of amorphous matrix composites with improved ductility.

액상가압공정으로 제조된 탄탈륨 연속섬유 강화 Zr계 비정질 복합재료의 기계적 성질의 이방성

이규홍 ( Kyu Hong Lee ),이상복 ( Sang Bok Lee ),이상관 ( Sang Kwan Lee ),이성학 ( Sung Hak Lee ) 대한금속·재료학회 2009 대한금속·재료학회지 Vol.47 No.9

Zr-based amorphous alloy matrix composites reinforced with tantalum continuous fibers were fabricated by the liquid pressing process, and their anisotropic mechanical properties were investigated by tensile and compressive tests of 0˚(longitudinal)-, 45˚-, and 90˚(transverse)-orientation specimens. About 60 vol.% of tantalum fibers were homogeneously distributed inside the amorphous matrix, which contained a small amount of polygonal crystalline particles. The ductility of the tantalum-continuous-fiber-reinforced composite under tensile or compressive loading was dramatically improved over that of the monolithic amorphous alloy, while maintaining high strength. When the fiber direction was not matched with the loading direction, the reduction of the strength and ductility was not serious because of excellent fiber/matrix interfacial strength. Observation of the anisotropic deformation and fracture behavior showed the formation of multiple shear bands, the obstruction of crack propagation by fibers, and the deformation of fibers themselves, thereby resulting in tensile elongation of 3%~4% and compressive elongation of 15%~30%. These results suggest that the liquid pressing process was useful for the development of amorphous matrix composites with excellent ductility and anisotropic mechanical properties.

액상가압공정으로 제조된 텅스텐 연속섬유 강화 비정질 복합재료의 미세조직과 기계적 성질

이규홍 ( Kyu Hong Lee ),이상복 ( Sang Bok Lee ),이상관 ( Sang Kwan Lee ),이성학 ( Sung Hak Lee ) 대한금속·재료학회 2007 대한금속·재료학회지 Vol.45 No.12

액상가압공정으로 제조된 금속 연속섬유강화 비정질 복합재료의 미세파괴거동

이규홍 ( Kyu Hong Lee ),이상복 ( Sang Bok Lee ),이상관 ( Sang Kwan Lee ),이성학 ( Sung Hak Lee ) 대한금속·재료학회 2008 대한금속·재료학회지 Vol.46 No.8

트랜스액티브 건축의 트랜스포밍(Transforming) 특성에 관한 연구

이규홍 ( Kyu Hong Lee ),손희주 ( Hee Joo Son ) 한국기초조형학회 2014 기초조형학연구 Vol.15 No.2

현시대의 건축은 인간중심의 관계성이 내포된 공간으로 다양한 디지털 매체들을 통해 트랜스액티브 건축을 실현한다. 본 연구 목적은 트랜스액티브 건축의 다양한 사건들 속에 인간 내면의 섬세한 감성 및 다양한 경험과 감동을 유발하여 건축과 소통하는 트랜스포밍 특성을 분석하고자 한다. 연구의 방법은 디지털 매체가 본격적으로 발달된 2000년대의 작품을 선정하여 귀납적 사고의 틀을 바탕으로 질적 분석을 통해 그 특징을 도출한다. 이를 통해 결론 내어진 트랜스포밍 특성은 다음과 같다. 트랜스포밍 공간은 다양한 사건들 속에 인간의 몸으로 세상을 지각함으로써, 공간과 소통하는 관계적 특성을 가진다. 이는 사용자들에게 우연적, 혼성적, 불확정의 모호한 지각적 특징으로 공간은 새로운 종을 탄생시키고 이질적인 것들의 결합을 통해 예측할 수 없는 알로바이오성을 나타낸다. 또한 이는 적합성의 의미를 가진 동종성으로 표현되기 보다는 분열적, 비결정적, 이종성, 일시성, 비물질적 특성을 가지며, 과정과 실행을 강조하는 불연속의 형태변이성으로 정의 내려진다. 마지막으로 트랜스포밍은 진화적, 비예측적, 변형적 공간으로 생물학적 외형이나 생명현상을 가진 유기적인 형태로 공간의 무한한 생명력을 지닌 초자연적인 모습으로 본질을 변형시키는 바이오모픽성을 도출한다. 즉, 트랜스액티브 건축의 트랜스포밍 특징은 공간의 예기치 못한 다양한 사건에 따른 가치 있는 경험과 지능적, 감성적인 공간을 제공함으로써, 궁극적으로 인간의 삶의 질을 높여줄 것으로 기대한다. 이는 트랜스액티브 건축의 다양한 특성 및 가능성을 제시하고 향후에도 인간을 중시하는 트랜스액티브 건축에 대해 진보적인 연구 및 프로젝트들이 지속적으로 나올 수 있기를 기대한다. Contemporary Architecture provides the space that contains human-oriented relations, and realizes transactive Architecture via diverse digital media. This study was conducted to analyze the transforming characteristic, which produces delicate human emotions, diverse experiences and impressiveness in the incidents from the Transactive Architecture. After choosing some works from the 2000s, when digital media were fully developed, their characteristics were derived via qualitative analysis based on the frame of the inductive reasoning. The following are the resultant transforming characteristics. The transforming space has a correlation characteristic that allows human beings in diverse incidents to perceive the world, and to communicate with the space. With accidental, hybrid and uncertain perceptional characteristics, the space gives birth to a new speciation, and has an allobio characteristic that is ``unexpected due to the combination of heterogeneous objects``. In addition, this is split and has amorphous, hybrid, temporary and non-material characteristics, and is defined as discontinuous morphological variation that focuses on the process and performance. Finally, as an evolving, unexpected and transformative space, the transforming space provides biomorphic characteristic that modifies the supernatural essence of the space with unlimited vitality in an organic form, which has biological appearances or vital phenomenon. Thus, it is expected that the transforming characteristic of the Transactive Architecture will eventually improve the life of human beings by providing valuable experiences and intelligent and emotional space according to diverse conditions with unexpected incidents. This study suggests diverse potentials of the Transactive Architecture based on the human-oriented idea, and it is expected that there will be further progressive studies and projects.