활성탄 함유량에 따른 광촉매(TiO₂) 시멘트 시편의 전기비저항 특성

공태현,이종원,예지훈,안재훈,오태민,Kong, Tae-Hyun,Lee, Jong-Won,Ye, Ji-Hun,Ahn, Jaehun,Oh, Tae-Min 한국터널지하공간학회 2020 한국터널지하공간학회논문집 Vol.22 No.5

활성탄(Activated carbon) 및 이산화티탄(TiO₂)이 혼합된 콘크리트는 질소산화물(NOx) 저감에 있어 우수한 성능을 나타내기 때문에 지하공간 및 터널 내부의 미세먼지 저감 목적으로 활용되고 있다. 환경 및 구조물 노후 영향으로 터널 내부에 설치된 미세먼지 저감 콘크리트 표면에서 손상이 발생된다. 따라서 미세먼지 저감 콘크리트의 성능 유지를 위해 손상(박리) 유무평가가 필요하다. 본 연구에서는 전기비저항 특성을 이용하여 콘크리트 박리 유무 평가를 위한 기초연구를 수행하였다. 활성탄(0~15%) 및 TiO₂ (0~25%) 혼합비(시멘트 중량 기준)가 증가함에 따라 전기비저항 값은 감소하였다. 건조 조건에서 활성탄 및 TiO₂가 혼합된 시멘트 경화시편은 일반 시멘트 경화시편보다 전기비저항 값이 최대 2.3배 감소되었다. 또한, 포화 조건(포화도 = 85~98%)에서 활성탄만 혼합된 경화시편은 일반 시멘트 경화시편보다 전기비저항 값이 최대 3.5배 감소하는 결과를 보였다. 시편 상태(건조 또는 포화)와 관계없이 활성탄(15%) 및 TiO₂ (25%)가 혼합된 미세먼지 저감 시편의 경우, 일반 시멘트 시편과 비교하여 전기비저항 값은 약 2.3~2.8배 차이를 보였다. 본 연구결과는 전기비저항을 이용하여 터널 내 미세먼지 저감 콘크리트의 박리를 평가하기 위한 기초자료로 유용하게 활용될 것으로 기대된다. Concrete with activated carbon and titanium dioxide (TiO₂) has been used to reduce the particulate matter (PM) in underground structures (e.g., tunnels) due to the high performance of nitrogen oxides (NOx) abatement. Damage (e.g. crack, spalling, or detachment) can be caused by the environmental and ageing effects on the surface of the particulate matter reduction concrete, installed on the tunnel lining. Therefore, it is important to evaluate the existence of spalling on the concrete surface for maintaining performance of NOx reduction. In this study, a basic research was performed for feasibility of spalling evaluation using electrical resistivity characteristics. Given the test results, the electrical resistivity was decreased as the ratios of activated carbon (0~15%) and TiO₂ (0~25%) were increased for specimens. Under a dry condition, electrical resistivity of cement specimens, mixed with activated carbon and TiO₂, was decreased up to 2.3 times, compared with the normal cement specimen. In addition, under saturation conditions (degree of saturation: 85~98%), electrical resistivity of cement specimens with activated carbon, was decreased up to 3.5 times, compared with the normal cement specimen. Regardless of the condition (dry or saturated), the difference of electrical resistivity values shows the range of 2.3~2.8 times between the mixing specimen (with activated carbon (15%) and TiO₂ (25%)) and the normal cement specimen. This study can help to provide basic knowledge for spalling evaluation using the electrical resistivity on the surface of the particulate matter reduction concrete in tunnels.

Treatment of chest wall osteoradionecrosis with a contralateral breast Y-V flap: a case report

공태현,김일국 대한미용성형외과학회 2022 Archives of Aesthetic Plastic Surgery Vol.28 No.3

Chest wall osteoradionecrosis, one of the most serious complications of radiation therapy for breast cancer treatment, is usually treated by wide debridement followed by coverage with a well-vascularized flap. However, the extent of radiation-induced injury and limits in performing wide resection of the injured bones often present challenges in treatment. Herein, we present our experience treating chest wall osteoradionecrosis with a contralateral breast Y-V flap in an 81-year-old woman. She was diagnosed with chest wall osteoradionecrosis and had grade 3 ptotic breasts. Redundant contralateral breast tissue was used for reconstruction to cover the wound. The flap was elevated in the subfascial plane after an inverted-T incision was made in the lower pole and inframammary fold of the contralateral breast, while preserving the perforators of the left lateral thoracic artery. The flap was spread using the Y-V advancement fashion to cover the wound. The patient was discharged 2 weeks after surgery. At 19 months postoperation, there were no complications or recurrence. The patient was satisfied with the short recovery time and surgical results. The contralateral breast Y-V flap allows simple and quick reconstruction, potentially expanding the available treatment options and therefore increasing flexibility in choosing a treatment plan for patients.

Drainage and seroma formation according to the size of sterile acellular dermal matrix in direct-to-implant breast reconstruction

공태현,Tae-Gon Kim,JunhoLee 대한미용성형외과학회 2022 Archives of Aesthetic Plastic Surgery Vol.28 No.4

Background Acellular dermal matrix (ADM) is widely used for prosthetic breast reconstruction. Although many studies have investigated the efficacy and complications of ADM in prosthetic breast reconstruction, studies on drainage and seroma formation according to the size of ADM manufactured using the same process are lacking. This study analyzed drainage and seroma formation according to the size of sterile ADM. Methods From January 2011 to June 2018, the authors retrospectively reviewed the medical charts of patients who underwent direct-to-implant breast reconstruction using MegaDerm at a single institution. The ADMs used were classified as small or large groups. The two groups were compared in terms of the volume and duration time of two closed-suction drains (supramuscular and submuscular drains). Seroma and infection risk were also analyzed. Results Of 344 patients, 69 were included. Among them, 22 patients were in the smallADM group and 47 patients were in the large-ADM group. The supramuscular drain volume (P=0.295) and time (P=0.365) were not significantly different between the two groups. However, the submuscular (P=0.001) and total drain volume (P=0.004) were higher in the large-ADM group. In addition, seroma occurred significantly more frequently in the large-ADM group (P=0.048), but there was no significant difference in minor infections (P=0.088). Conclusions The size of sterile ADM affected drainage and seroma formation, with a larger size increasing drain volume and seroma risk. This study could provide a clinical basis for the safe usage of large sterile ADM.

가임여성의 출산ㆍ양육에 대한 인식

공태현,임정도 보건의료산업학회 2011 보건의료산업학회지 Vol.5 No.3

This study is to identify the related factors for birth․bringing-up from 544 women from 20s to 40s who can be pregnant residing in Busan in order to explore the method for birth encouragement in the midst of the low birth reality in Korea. It was revealed from the research result that the married women who have a birth plan recognize the marriage and the value of the children more importantly than the economical burden. In addition, it was known that the wished number of the children for unmarried women was influenced most greatly by the marriage and the value of the children. The expectation of the institutional supporting for the birth encouragement was the consideration for the time of bringing up and support to returning to the labor market after the birth.

의료기관 종사자들의 직장몰입을 위한 직종별 상사의 바람직한 리더십 행태

공태현,한용수 대한경영정보학회 2013 경영과 정보연구 Vol.32 No.1

본 연구는 부산지역 소재한 병원급 이상 의료기관에 근무 중인 663명의 의료 기관 종사자를 대상으로 하였으며, 전체 연구대상자에서는 상사의 리더십 행태가 서번트 리더십과 변혁적 리더십인 경우에 의료기관 종사자들의 직장몰입에 유의 한 긍정적인 영향을 미치는 것으로 나타났다. 의료기관 종사자들이 인식하는 상사의 리더십을 리더십 행태별로 살펴본 결과, 상사에 대한 리더십 행태의 인식은 변혁적 리더십, 거래적 리더십, 서번트 리더십 순으로 나타났다. 상사의 리더십 행태가 의료기관 종사자들의 직장몰입에 미치는 영향을 직종별 로 살펴본 결과, 상사의 리더십 행태가 간호사 직종은 변혁적 리더십인 경우에, 의료기사 직종은 서번트 리더십과 변혁적 리더십인 경우에, 사무행정 직종은 서 번트 리더십인 경우에 연구대상자의 개인적 특성변수 통제유무와 관계없이 직장 몰입에 유의한 긍정적인 영향을 미치는 것으로 확인되었다.

여성들의 건강기능식품 섭취와 관련 요인

공태현,최종순,이용환 국제보건미용학회 2008 국제보건미용학회지 Vol.2 No.1

커뮤니티 매핑을 활용한 해외 문화유산기관 프로그램 사례 연구

공태현,권지연 한국박물관학회 2022 博物館學報 Vol.- No.42

The advent of New Museology has prompted cultural institutions to meet current demand by not only providing visitors with knowledge and experiences but also opening up spaces that encourage interactive participation by the local community. Eco-museum is one form of museum where local residents and other visitors become the main actors in interpreting and integrating heritage-related displays. In line with these new trends, this study proposes community mapping as a way for cultural heritage institutions to encourage more visitors to participate, share experiences, and cooperate with their community’s realization of cultural democracy. Community mapping refers to social members in a spatial or regional unit who share a sense of psychological cohesion or affiliation as part of the act of map-making. Through voluntary participation, community mapping based on collective intelligence can eventually transform the visitors into production and consumption agents at their community’s cultural heritage sites. This paper analyzes four case studies of community mapping conducted at the Royal Ontario Museum, the National Catalonia Museum, the Historical Society of Pennsylvania, and The Department of Cultural Heritage and Sicilian Identity. This analysis will hopefully serve as useful references for potential applications in Korea, which has yet to explore community mapping in its cultural sector. 신박물관학의 대두로 문화유산기관은 다양한 지식과 경험의 제공뿐만 아니라 개방된 공간에서 참여를 유도하여 지역공동체의 중심 역할을 해야 한다는 시대적 요구에 직면했다. 이와 더불어 우리 주변에 등장하고 있는 다양한 신기술들을 어떻게 문화유산 활용에 접목하여 문화민주주의를 실현할 수 있을까 하는 고민도 하고 있다. 본 연구는 이러한 시대적 흐름 속에 지역공동체의 참여를 이끌어내는 방안으로 디지털 기반 커뮤니티 매핑(community mapping)을 제안하고자 한다. 문화지도 제작법의 하나인 커뮤니티 매핑은 공간적․지역적 단위의 사회구성원 또는 심리학적 공통성이나 소속감을 공유하는 집단이 지역이나 집단에 대한 정보로 지도를 만드는 행위를 의미한다. 집단지성에 기반을 둔 참여형 제작지도인 커뮤니티 매핑은, 관람객의 자발적인 참여를 통해 궁극적으로 관람객을 생산과 소비를 동시에 수행하는 주체로 전환하고 문화유산기관의 일부로 편입시킨다. 본고는 문화유산 기반 커뮤니티 매핑을 효율적으로 활용하고 있는 4개의 해외기관-로열 온타리오 박물관, 국립 카탈루냐 미술관, 펜실베이니아 역사학회, 시칠리아 문화유산부-의 사례들을 분석하여 그 의미를 도출함으로써 아직 국내에서는 잘 이루어지고 있지 않은 활용 가능성에 대해 모색해 보고자 한다. 이 사례들은 기관들이 내 외부 환경변화에 대한 대응과 혁신을 통한 차별화 전략으로서 커뮤니티 매핑을 도입하였고, 이를 통해 유대감 형성, 기관 홍보 효과, 참여 유도, 다양한 협력체계 구축, 문화민주주의와 문화가치 창출, 디지털 장소 구축 등을 실현한 것을 알 수 있다.

액정고분자섬유와 열가소성고분자 사이의 계면접착력 측정

공태현,조길원 한국고분자학회 1995 한국고분자학회 학술대회 연구논문 초록집 Vol.1995 No.10

Thermal Annealing Effects on Structure-Property Relations of 3D Multi-Cation Metal Halide Perovskite Thin Films

공태현,김용진,강기훈 한국공업화학회 2023 한국공업화학회 연구논문 초록집 Vol.2023 No.1

병원조직구성원들의 리더십에 대한 인식과 조직유효성 간의 관계: 부산지역 의료기관 중심

공태현 ( Tae Hyun Kong ) 대한보건협회 2010 대한보건연구 Vol.36 No.1

The aim of this study is to examine the relationship between hospital employees` recognition of their leader`s leadership and the organizational effectiveness. A survey was conducted on randomly selected 248 hospital employees from 15 hospitals in Susan area. As a result, there is a significant relationship between the organizational effectiveness and the leadership recognized by the employees. Significant factors of leadership that affect the organizational effectiveness were identified: charisma and individualized consideration in the transformational leadership, contingent reward and management by exception in the transactional leadership, and superiors` sense of building community in the servant leadership. Statistically significant differences were found in the level of organizational effectiveness in association with the employees` demographic characteristics.