BIM 견적 작업 생산성 향상을 위한 업무 환경 조성에 관한 연구

김성아,박권,송병섭,최철호,진상윤,Kim, Seong-Ah,Park, Gweon,Song, Byeong-Seob,Choi, Chel-Ho,Chin, Sang-Yoon 한국건설관리학회 2016 한국건설관리학회 논문집 Vol.17 No.1

BIM 적용으로 인해 비용절감 효과를 얻은 사례가 많은 학회, 보고서, 세미나 등을 통해 보고되고 있다. 이러한 사례에서는 BIM을 적용하여 재작업 및 재시공방지와 같은 직접적인 비용 절감 효과를 얻을 수 있다고 언급하고 있다. 또한 작업시간 단축, 업무 생산성 향상과 같이 비용으로 환산할 수 없는 효과도 존재한다. 국내외 BIM 사용자들은 BIM 적용으로 인한 비용절감에 관한 잠재적인 가치가 있다고 판단하고 있다. 그러나 아직까지 국내에서는 BIM 적용으로 인한 뚜렷한 경제적 가치(ROI)가 드러나지 않고 있으며, 국내 BIM 사용자들도 경제적 성과에 대해서 부정적인 반응을 보이고 있다. 따라서 본 연구에서는 경제적 가치로 환산하기 어려운 작업시간, 생산성 향상과 같은 BIM 적용 효과를 진단하고, BIM 적용 효과를 얻기 위해서 수반되어야 하는 것들은 무엇인지 살펴보고자 한다. 그리고 본 연구는 건설 프로젝트 생애주기 동안 다양한 분야에 적용될 수 있는 BIM의 적용효과를 견적분야를 대상으로 조사하였다. 본 연구는 동일한 프로젝트를 대상으로 기존 견적과 BIM 견적에서의 작업시간을 비교하였다. 그 결과 기존 견적과 같이 BIM 견적에서 작업속도 및 생산성을 향상시키기 위해서는 실무자들의 BIM 교육, 모델링 작업 기준, BIM 연동 내역서가 필요한 것으로 드러났다. Many cases have mentioned the effect by applying BIM on the media such as at conferences, workshops, reports, ect. These cases reported that costs could be saved directly by prevention the need to re-do and reconstruct caused by using BIM. BIM users mentioned that using BIM has potential value in saving costs. The benefits of the BIM include intangible value that cannot be estimated in costs, such as reducing work time and improving productivity. However, the financial value of using BIM, such as Return on Investment, has not yet been exposed, and BIM users have a negative view of the financial value of BIM in Korea. Therefore, this study has researched the effects of applying BIM on construction estimate services in view of business productivity, not finance. This study compared the traditional and BIM based estimation, and verified the effect of estimating BIM through work sampling. This study investigated a precondition for getting the effects of BIM based estimation. The results show a need for BIM education, 3D Modeling standards, and database on quantity in order to improve product ivity and reduce work time on BIM based estimation

가구에서의 오브제 활용에 관한 연구

김성아,Kim Seong-Ah 한국가구학회 2004 한국가구학회지 Vol.15 No.2

Since Cubists represented a way of expressing image moving away from traditional illusion effect, new realities represented by collage and assemblage. Furthermore, Marcel Duchamp, a French Dadaist, suggested the concept of ready-made that everyday objects exhibited in an odd way in a gallery. These early fine art cases highly influenced to furniture design in the second half of the twentieth century. The use of objects in contemporary furniture is closely related to the emergence of Pop Art in the late 1950s and that of Postmodernism. After the 1970s the use of found objects were frequently utilized in furniture design of all over the countries. As an ecological issue became a new consideration to furniture designers, found objects also gave a chance to use recycled materials. Even in studio furniture area which is considered wood as a major material at the early stage, many studio furniture designers began to adapt found objects in their designs as a new source of Inspiration after the 1970s. This study explored various examples of found objects in furniture design and examined the meaning of the use in different designers and regions.

건설 프로젝트 업무관리 효율화를 위한 콘텐츠기반 협업 플랫폼 개발

김성아,정충원,김남호,최철호,진상윤,Kim, Seong-Ah,Jung, Choong-Won,Kim, Nam-Ho,Choi, Cheol-Ho,Chin, Sang-Yoon 한국건설관리학회 2016 한국건설관리학회 논문집 Vol.17 No.3

건설 프로젝트에서 정보관리 시스템은 도면, 문서관리, 행정처리 위주로 사용되고 있으며, 실시간 의사소통 및 참여자간의 의사전달 관리를 지원하는데는 한계가 있다. 본 연구에서는 다양한 커뮤니케이션 방식과 콘텐츠를 지원하는 플랫폼 비즈니스 시대에 맞추어 프로젝트 참여자간 의사전달 관리를 지원하는 협업 플랫폼을 개발함으로써 효과적인 의사소통, 정보공유 및 업무관리 효율화에 기여하고자 한다. 도면 및 문서관리 또는 행정업무 중심으로 사용되는 기존 프로젝트 또는 사업관리 시스템에서 벗어나 프로젝트 참여자간 커뮤니케이션 및 협업과 관련된 일련의 활동을 지원하는 협업 플랫폼(CCP)을 개발하는 것이 본 연구의 목적이다. 본 연구에서 개발된 CCP는 설문조사를 통해 협업 플랫폼 사용에 따른 효과가 검증되었으며, 기존 커뮤니케이션 또는 협업 방식에 비해 정보공유 및 배포, 기록 및 추적관리가 용이하며, 자신의 업무능력 향상에 기여한 것으로 나타났다. An information system in a construction project has been typically used for drawing, document management, and administration process. And it has limitations to support real-time communication and collaboration among project stakeholders. The objective of this research is to improve communication, information share, and task management by developing a collaboration platform among project stakeholders supporting various communication methods and contents. The platform developed in this research, named as CCP, aims to support communication and collaboration related activities beyond the scope of legacy systems at construction sites. CCP was validated through pilot test and user survey, and it was found to be very helpful for sharing and distributing information, tracking and recording, and improving a user's work capability.

치과용 핸드피스에 의한 일시적 진동감각역치 변화

김성아,이종영,김두희,박순우,Kim, Seong-Ah,Lee, Jong-Young,Kim, Doo-Hie,Park, Soon-Woo 대한예방의학회 1995 예방의학회지 Vol.28 No.4

치과용 핸드피스에서 발산하는 고주파수의 진동에 의한 일시적 진동감각역치 변화를 관찰하고자 치과위생병 28명을 대상으로 34,000rpm의 low-speed handpiece를 진동기구로 사용하였다. 진동에 폭로시키기 전과 후, 치과의사가 스케일링시 취하는 작업자세에 5분간 폭로시킨 후의 진동감각역치를 청력계기의 골전도진동기를 사용하여 250 Hz에서 그들이 주로 사용하는 손의 제2지두수에서 측정한 결과, 각각 $23.5{\pm}3.5dB,\;30.8{\pm}4.2dB,\;23.7{\pm}4.6dB$로 진동에 5분간 폭로시킨 후의 역치가 폭로 전에 비해 7.3dB의 유의한 증가가 있었다(p<0.001). 진동폭로 전후의 차이에 따른 분포를 보면, 10 dB 내외로 증가한 사람이 71.4%로 대부분이었고 16 dB의 증가가 가장 높았다. 진동 폭로 전의 진동감각역치와 신장, 체중, 체질량 지수와의 상관관계는 각각의 상관계수가 0.0360, -0.1657, -0.2641로 통계적 유의성은 없었으며, 흡연에 따른 차이도 흡연군(N=20)과 비흡연군(N=8)의 진동감 각역치가 각각 23.1 dB, 24.6 dB로 그 차이 가 없었다. 본 연구 결과로 볼 때 핸드피스와 같은 고주파-진동기구를 사용하는 치과의사 및 치과위생사에게서 진동감각역치의 변화가 예상되며, 말초신경병증의 원인이 될 수 있는 작업자세에 의한 장기간의 영향 및 아말감 충전시 사용하는 수은의 영향에 대해서도 연구가 필요할 것으로 생각된다. This study was performed to investigate the possibility of temporary threshold shift (TTS) of vibration sense could induced by exposure to high-frequency vibration or by work position taking by dentists in drilling or polishing. The vibratory perception thresholds (VPT) of 28 healthy men were measured on the index fingertip pulp of dominant hand at 250 Hz. The vibrating tool used in test was a low-speed handpiece of 34,000 rpm. For the TTS test, the dominant hand was exposed to high-frequency vibration and to work position for five minutes, respectively. The VPTs before and after vibratory exposure were $23.5{\pm}3.5dB,\;30.8{\pm}4.2dB$, respectively and VPT after work position was $23.7{\pm}4.6dB$. The difference between before and after vibartory exposure was statistically significant (p<0.001). The correlation of height, weight and BMI with baseline VPTs was not statistically significant. Also, there was no difference of VPTs by smoking. These results suggest that high-frequency vibration from dental handpieces might cause the impairment of vibration sensation.

건설 현장 특성을 고려한 출역관리시스템 선정 프레임워크 개발

김성아,진상윤,장문석,정충원,최철호,Kim, Seong-Ah,Chin, Sang-Yoon,Jang, Moon-Seok,Jung, Choong-Won,Choi, Cheol-Ho 한국건설관리학회 2015 한국건설관리학회 논문집 Vol.16 No.4

출역관리는 전통적으로 출역점검표 작성에 의해 수작업으로 진행되기 때문에 많은 노력과 시간을 요구했다. Bar Code, QR code, RFID와 같은 전자장치들이 발달하면서 자동화된 출역관리시스템이 출현하였고, 최근에는 지문, 정맥인식과 같은 생체인식과 융합된 다양한 유형의 출역관리시스템이 등장하고 있다. 출석체크를 위해 사용되는 다양한 인식 장비들의 출연에도 불구하고, 건설현장 마다 적합한 출역관리시스템을 선정하기 위한 체계적인 기준이 부족한 실정이다. 따라서 본 연구는 출역관리에 사용되는 다양한 인식 장비를 건설 현장에 적합한 시스템을 선정하기 위한 체계적인 의사결정 프레임워크를 제시하는 것이 목적이다. 본 연구는 건설현장에서의 사용성을 테스트하기 위해 인식장비 마다 특징들을 살펴보고, 기존 문헌 및 전문가 인터뷰를 수행하였다. 테스트 결과, 가장 빠른 시간 내에 많은 인원의 출석을 확인하는 것에는 RFID가 적합한 것으로 나타났다. 그리고 손혈관과 지문의 경우, 손가락 변형과 상관없이 페인트, 시멘트와 같은 오염물질이 많이 묻어있는 경우 인식이 되지 않는 것으로 나타났다. 이러한 테스트 결과를 반영하여 본 연구는 출역관리시스템 선정을 위한 모델을 제시하였으며, 보다 효율적인 출역관리시스템 구축에 기여할 것으로 기대한다. Labor attendance management has traditionally been carried out by writing a table for checking an attendance of labor, which requires a lot of time and effort. As electronic devices with additions such as barcodes, Quick Response codes, and Radio Frequency Identification(RFID) have been developed, however, automated labor attendance management systems have appeared. Recently, various types of labor recognition devices converged with biometrics (fingerprint, vein, face recognition, etc.) have been released. However, although these devices can be used to check attendance automatically, there is insufficient guidance when it comes to selecting the appropriate labor attendance management system for construction sites. Therefore, this study proposed a decision framework to determine which labor attendance management system would be suitable for a construction site and to select the labor recognition device. This study investigated different labor recognition devices, focusing on how they worked, and tested the performance of devices and their usability for construction labor attendance management. The test results showed that RFID is most suitable when verifying the attendance of many laborers over a short period of time. The devices for hand vein and fingerprint recognition did not function when there was a foreign material such as cement or paint on the laborer's hand, except for a deformed finger. Reflecting these test results, this study suggested a framework for selecting a labor attendance system and recognition device; this is expected to contribute to the development of more efficient labor management systems.

공동주택 리모델링 초기 설계안 검토 자동화 시스템 - 벽체, 바닥판의 정량 데이터 추출

김성아(Kim, Seong-Ah),서원석(Seo, Wonseok),김진영(Kim, Jinyoung) 대한건축학회 2021 대한건축학회논문집 Vol.37 No.3

It is estimated in 2020 that over 2.4 million houses in Korea are aged more than 30 years. This means that over 40% of the entire houses in Korea are considerably aged. Two options could be taken to improve the poor residential environment: either reconstruction or remodeling. Compared to reconstruction, remodeling has advantages on the construction period and cost. In addition, remodeling is environmentally friendly; and therefore, current regulation is favorable to remodeling over reconstruction. During the early stages of the apartment remodeling project, many candidate floor plans are presented. In order for the evaluation of those multiple candidate plans, extracting information regarding bearing walls and other structural elements from the plans is critical. Accordingly, an automated and quantitative data extraction system for walls and slabs from before- and after-remodeling floor plans is developed. With the developed program, it is possible to analyze and visualize bearing walls, non-bearing walls, slabs, and weight alterations after remodeling in a rapid and automated manner.

결막을 포함한 눈꺼풀에 발생한 일차성 국소아밀로이드증 1예

김성아(Seong Ah Kim),이보영(Bo Young Lee),양석우(Suk Woo Yang) 대한검안학회 2018 Annals of optometry and contact lens Vol.17 No.4

Purpose: Amyloidosis involving the eyelid margin extending onto the conjunctiva is a very rare condition. We report our experience with a case of primary localized amyloidosis of the eyelid. Case summary: A 45-year-old man presented with a recurrent nodule on the left medial canthal area extending onto the punctum. He was previously diagnosed with mild squamous dysplasia and hyaline degeneration in stroma by histopathologic examination. Biopsy was performed through wide excision of mass under local anesthesia. Hematoxylin & eosin stained sections showed pink amorphous hyaline deposits and Congo red stained sections demonstrated dichroism and birefringence under polarized light microscopy. No systemic involvement was noted, therefore the patient was diagnosed with primary localized amyloidosis. At the postoperative 6-month follow-up, recurrence of mass was not observed. Conclusions: In the identification of an eyelid mass, amyloidosis should be considered. After successfully surgical excision, follow-up observation is required to watch for recurrence.

영상분석 기술 기반 모듈러 건축 공장제작 공정 모니터링 자동화

김성아(Kim, Seong-Ah),강태일(Kang, Tea-il),김진영(Kim, Jinyoung) 대한건축학회 2021 대한건축학회논문집 Vol.37 No.6

The entire process from manufacturing in a factory to on-site assembly is running sequentially in modular building construction. Therefore, an unexpected delay in factory manufacturing would impede the overall construction schedule. Hence, the implementation of appropriate progress monitoring is essential in modular building construction. In this study, a method of vision-based progress monitoring for a modular building factory has been developed. Instead of actual images of modular unit manufacturing, videos created from 3D modeling were used to train a deep learning model. Then, videos recorded during modular manufacturing in a factory were used to test the system. Although the deep learning model was trained with the virtual model, the test results demonstrated that all six processes were successfully detected. Out of 225 image frames on average, the number of unrecognized frames was 28-53, resulting in an average recognition rate of 83.1%. The recognition accuracy of the developed progress monitoring system ranges from 62.5 to 100%, and the average value was 84.4%.

우리나라 성인의 한식 섭취율에 따른 다량영양소 및 항산화 비타민 섭취현황

김성아(Kim, Seong-Ah),전신영(Jun, Shinyoung),홍은주(Hong, Eunju),정효지(Joung, Hyojee) 한국영양학회 2016 Journal of Nutrition and Health Vol.49 No.5

본 연구에서는 우리나라 19세 이상 성인의 한식 섭취율과 그에 따른 식생활 특성을 파악하기 위해 제 4·5기 국민건강영양조사 (2007~2012) 자료의 24시간 회상법 자료와 한식 데이터베이스 및 상용식품 중 영양소 함량 데이터베이스를 연계하여, 1일 한식 섭취율과 영양소 및 항산화 비타민 섭취량을 추정하였다. 그 결과 대상자 33,069명 중 75%가 1일 한식 섭취율이 75% 이상이었고, 한식 중에서는 배추김치, 잡곡밥, 쌀밥 순으로 섭취빈도가 높았다. 한식 섭취율이 높은 군일수록 대상자의 평균 연령이 통계적으로 유의하게 높았고, 가구소득이 가장 낮은 1분위와 교육수준이 가장 낮은 1분위의 비율이 통계적으로 유의하게 높았다. 한식 섭취율에 따른 4분위군의 영양소 섭취 양상을 살펴보았을 때, 한식 섭취율이 높은 군일수록 에너지, 단백질, 지방의 평균 섭취량이 통계적으로 유의하게 낮았고, 항산화 비타민 중에서는 비타민 A, β-카로틴과 β-크립토잔틴, 비타민 C가 한식 섭취율과 양의 관계를 보였으며, 레티놀, α-카로틴 비타민 E 섭취량은 음의 관계를 보였다. 또한 한식 섭취율이 높은 군일수록 감자 및 전분류, 두류, 종실류, 채소류, 과일류, 해조류의 섭취가 높았고, 곡류, 당류, 우유·유제품, 유지류 등의 섭취가 낮았다. 이상의 결과를 요약하면, 한식 섭취율이 높은 군은 그렇지 않은 군에 비해 에너지 섭취량이 적고, 다량영양소 중 탄수화물의 에너지 비율은 높은 반면, 지방의 에너지 비율은 적었다. 한식 섭취율은 비타민 A, β-카로틴과 β-크립토잔틴, 비타민 C 등의 항산화 비타민 섭취량과 유의한 양의 연관성이 있었으며, 성, 연령, 소득수준 등이 각각 동일할 때에도, 한식 섭취율이 높은 군은 낮은 군에 비해 항산화 영양상태가 우수함을 확인할 수 있었다. 한식의 섭취 수준에 따른 건강 영향을 구명하기 위한 후속연구의 수행이 필요한 것으로 사료된다. Purpose: The purpose of this study was to estimate intakes of macronutrients and antioxidant vitamins according to the Hansik consumption rate among Korean adults. Methods: Using data from the 2007~2012 Korea National Health and Nutrition Examination Survey, a total of 33,069 subjects aged over 19 years old were included in this study. We estimated individual daily Hansik consumption rates and intakes of macronutrients and antioxidant vitamins, including vitamin A and its subgroup such as retinol, α-carotene, β-carotene, and β-cryptoxanthin, vitamin C, and vitamin E, by linking food consumption data with the nutrient and antioxidant vitamin database of commonly consumed foods. Results: Around 75% of subjects consumed Hansik in over 75% of their daily total consumed food. The most frequently consumed Hansik was cabbage kimchi (1.57 times/day), followed by multigrain rice (0.86 times/day) and white rice (0.80 times/day). The household income level and education level was inversely associated with the Hansik consumption rate. There was a positive relationship between Hansik consumption rate and vitamin A, β-carotene, β-cryptoxanthin, and vitamin C intakes. On the other hand, Hansik consumption rate was inversely associated with energy and fat intake. Conclusion: The results of this study suggest that Hansik consumption could provide more antioxidant vitamins and less energy and fat. Thus, further research will be needed to analyze the association between Hansik and health effects.

공정성 조절효과에 따른 서비스 실패 관련 변인들 간의 관계구조분석

김성아(Seong Ah Kim),유태순(Tai Soon Yoo) 한국복식학회 2014 服飾 Vol.64 No.3

This study attempts to analyze relational structures among service failure-related variables after the moderation of fairness in the beauty service industry with the following purposes: First, it aims to review and investigate service failure & service recovery strategies, non-switching intentions after recovery, revisit intention, the intent to provide word-of-mouth recommendations and previous studies on service failure and recovery in the beauty service industry. Second, it targets the analysis of the role of fairness as a variable that moderates relations between service recovery strategies and post-recovery satisfaction in the beauty service industry. For this, the following research method was used: This study has investigated the effect of service failure and its recovery strategies (behavioral recovery strategy, psychological recovery strategy, monetary recovery strategy) on customer satisfaction for beauty service users and used the Structural Equation Model (SEM) to further analyze and verify the effect of the satisfaction on post-satisfaction behavior (non-switching intention, repurchase intention and the intent to provide word-of-mouth recommendations). The SEM was divided into a measurement model and structural model to determine if the model is appropriate and estimate the parameters of the path coefficient. In addition, this study examined to see if fairness (procedural fairness, distributive fairness and interactive fairness) works as a moderating variable while the service recovery efforts affect customer satisfaction. Then, the role of service recovery strategies, targeted to satisfy the customers who were dissatisfied because of service failure, were investigated. In addition, its effect on post-satisfaction behavior was analyzed from the structural aspect, and the moderating role was examined as well. Then, the role of the service recov ery strategy, which can be used to satisfy dissatisfied customers, was examined, and the effect of the satisfaction on customer behavior was analyzed from a structural perspective. In addition, the moderating role of fairness was tested. As a result, this study is significant in that it helps service providers formulate service recovery-related strategies.