2010/2011년도 한국 발생 구제역 확산에 관한 연구

황지현,오창혁,Hwang, Jihyun,Oh, Changhyuck 한국데이터정보과학회 2014 한국데이터정보과학회지 Vol.25 No.2

구제역은 전염성이 높고 치명적 결과를 유발하는 우제류 전염병이며, 2010/2011년도에 국내에서 발생한 구제역 (2010/2011 구제역)은 사회 및 경제적으로 국가에 재난 수준의 손실을 끼쳤다. 따라서 국가적 차원에서 구제역의 예방과, 발병 시 피해를 줄이려는 많은 노력을 하고 있다. 이러한 노력의 하나로 구제역의 전염 현상을 확률적으로 모형화하고 이해하려는 노력이 필요하다. 영국에서 발생한 2001년 구제역은 그 규모와 피해가 막대하여, 영국에서는 다양한 확률적 모형으로 구제역 전파 현상에 대한 이해를 통하여 미래의 발생에 대비하려는 연구가 이루어져 왔다. 그러나 2010/2011 구제역에 대하여는 확률적 모형을 활용한 연구가 미미한 편이다. 따라서 본 연구에서는 2010/2011 구제역에 대하여 시간-공간 확률 SIR 확률모형을 가정하고 시간과 공간에 따르는 전파 현상에 대하여 고찰한다. 농림수산검역검사본부에서 발표한 구제역 감염데이터와 통계청의 전국농가센서스 자료의 일부인 전체 우제류 농가의 데이터가 본 연구의 분석에 필요한 정도로 상세하지 않으므로 추정 및 보정작업을 통하여 데이터를 보완하였다. 감염데이터를 이용하여 커널함수를 추정하고, 전국 우제류 농장데이터를 이용하여 시뮬레이션을 통하여 모형의 모수를 추정하였다. Foot-and-mouth Disease (FMD) is a highly infectious and fatal viral livestock disease that affects cloven-hoofed animals domestic and wild and the FMD outbreak in Korea in 2010/2011 was a disastrous incident for the country and the economy. Thus, efforts at the national level are put to prevent foot-and-mouth disease and to reduce the damage in the case of outbreak. As one of these efforts, it is useful to study the spread of the disease by using probabilistic model. In fact, after the FMD epidemic in the UK occurred in 2001, many studies have been carried on the spread of the disease using a variety of stochastic models as an effort to prepare future outbreak of FMD. However, for the FMD outbreak in Korea occurred in 2010/2011, there are few study by utilizing probabilistic model. This paper assumes a stochastic spatial-temporal susceptible-infectious-removed (SIR) epidemic model for the 2010/2011 FMD outbreak to understand spread of the disease. Since data on infections of FMD disease during 2010/2011 outbreak of Aniaml and Plant Quarantine Agency and on the livestock farms from the nationwide census in 2011 of Statistics Korea do not have detail informations on address or missing values, we generate detail information on address by randomly allocating farms within corresponding Si/Gun area. The kernel function is estimated using the infection data and by using simulations, the susceptibility and transmission of the spatial-temporal stochastic SIR models are determined.

새로운 기능성분 데이터베이스, 파이토스테롤 DB

황지현(Jihyun Hwang),최은지(Eunji Choi),이준수(Junsoo Lee),김인환(In-Hwan Kim),김병희(Byung Hee Kim) 한국식품영양과학회 2023 식품산업과 영양 Vol.28 No.1

태양열원 연계 지열원 히트펌프시스템의 최적 설계 및 운전 방안에 대한 연구

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6

carbon neutrality, “ZEB certification” and “mandatory installation of renewable energy systems” have ensured the inevitable introduction of renewable energy along with insulation and high-efficiency equipment systems for a reduction in building energy. Meanwhile, studies have been conducted on the use of various alternative renewable energy sources, such as sunlight, solar heat, ground heat, and fuel cells; however, it remains extremely difficult to apply them to the building sector, except for sunlight and solar heat energies, owing to regional restrictions. In the case of the geothermal source heat pump system, there is a problem of lowering heating performance due to a drop in underground temperature due to an imbalance in heating and cooling loads in domestic climate conditions. Therefore, the solar power system was selected as an auxiliary heat source to supplement the insufficient heat source during the heating period, and previous studies confirmed that the power consumption of the heat pump and the underground heat exchanger circulation pump can be reduced by improving the thermal environment of the heat source. However, since the solar power system requires a lot of initial investment costs, it is important to produce the optimal effect with the geothermal power heat pump system through efficient design and operation. Therefore, in this study, an analysis model was established based on the relational expression of the elements constituting the system for the optimal design and operation of the geothermal source heat pump system linked to solar sources, and a numerical analysis tool was prepared. The optimal design and operation conditions were derived through various parameter studies by analyzing the effect of system switching temperature from geothermal source to solar source through various numerical experiments. As a result of applying it to the target building, it was shown that it was possible to reduce power consumption by 25% compared to the case of using only a geothermal source.

스토리텔링을 활용한 한국적인 그래픽패턴 개발에 관한 연구

황지현(Hwang, Jihyun) 인제대학교 디자인연구소 2015 Journal of Integrated Design Research (JIDR) Vol.14 No.1

연구배경 21세기에 문화 산업이 요구하는 디자이너의 새로운 역량은 디자인을 넘어서 ‘문화를 디자인’하는 것이다. 대중과 함께 공유하는 디자인이란 스토리텔링이 살아있는 디자인이라고 할 수 있다. 우리의 민속 문화 안에는 무궁무진한 문화콘텐츠가 있다. 앞으로 한국의 스토리텔링이 잘 담겨진, 민족문화에 뿌리를 담그고 있는 디자인의 개발은 더욱 빠르게 진행될 것이다. 본 연구논문은 한국의 전통문화를 바탕으로 하는 스토리텔링을 통한 디자인의 방향을 제시하는데 목적이 있다. 연구방법 본 논문에서는 우리 민족이라면 누구나 잘 알고 있는 이야기를 두 점 선별하여 그 안에 담겨져 있는 각 소재들의 상징성을 분석하고 그래픽 상징물들을 분류해 내어 주소재와 부소재로 나누어 패턴화 하였다. 완성된 패턴은 실물과 같은 제품에 적용하여 상품화의 가능성을 제시하였다. 연구결과 우리나라의 민족문화의 스토리텔링의 연구를 통해 작품을 제작하는 것은 전통문화에 대한 관심을 유도 하고 탄탄한 콘텐츠를 구축하는데 효과적으로 활용할 수 있는 디자인의 기반이 됨을 알 수 있었다. 결론 본 논문은 한국의 전통문화의 대한 관심을 유도하고 문화 콘텐츠를 만들어 나가는 주역이 되는 디자이너들에게 전통문화인 우리의 이야기를 그래픽화하는 작업의 프로세스를 제시하고 있다. Background The new capabilities of the designers who have the cultural industry needs in the 21st century is to “design culture” beyond design. It can be said that e design as storytelling is alive with the public. We have endless cultural content inside of folk culture. Storytelling exists strongly in South Korea, and the development of designs rooted in the national culture will proceed more quickly. This paper aims to present the direction of the design through storytelling that is based on the traditional culture of Korea. Methods In this study, I selected ethnic ‘anyone’ who knows the Korean story two points to analyze the symbolism of each of the materials contained therein are taking classified material and graphic symbols address was divided into sub-patterned material. The finished pattern is applied to the real and the same product presented the possibility of commercialization. Result It is produced through the research work of the country’s national culture of storytelling was found that based on that draw attention to the design and build a solid content can be used as effects on traditional culture. Conclusion This study draw attention to the Korean traditional culture and present the process of visualization to work for our story is that the protagonist traditional culture for designers to make the cultural contents.

태양열원 연계 지열원 히트펌프시스템의 최적 설계 및 운전 방안에 대한 연구

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6

carbon neutrality, “ZEB certification” and “mandatory installation of renewable energy systems” have ensured the inevitable introduction of renewable energy along with insulation and high-efficiency equipment systems for a reduction in building energy. Meanwhile, studies have been conducted on the use of various alternative renewable energy sources, such as sunlight, solar heat, ground heat, and fuel cells; however, it remains extremely difficult to apply them to the building sector, except for sunlight and solar heat energies, owing to regional restrictions. In the case of the geothermal source heat pump system, there is a problem of lowering heating performance due to a drop in underground temperature due to an imbalance in heating and cooling loads in domestic climate conditions. Therefore, the solar power system was selected as an auxiliary heat source to supplement the insufficient heat source during the heating period, and previous studies confirmed that the power consumption of the heat pump and the underground heat exchanger circulation pump can be reduced by improving the thermal environment of the heat source. However, since the solar power system requires a lot of initial investment costs, it is important to produce the optimal effect with the geothermal power heat pump system through efficient design and operation. Therefore, in this study, an analysis model was established based on the relational expression of the elements constituting the system for the optimal design and operation of the geothermal source heat pump system linked to solar sources, and a numerical analysis tool was prepared. The optimal design and operation conditions were derived through various parameter studies by analyzing the effect of system switching temperature from geothermal source to solar source through various numerical experiments. As a result of applying it to the target building, it was shown that it was possible to reduce power consumption by 25% compared to the case of using only a geothermal source.

저비용, 고성능 건물에너지관리시스템(BEMS) 운영관리 알고리즘 개발

황지현(Jihyun Hwang),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.11

For the purpose of wide spread of economical building energy management system(BEMS) field test of the starting product based on the new developed open type operating system was tried. The K-laboratory in Hwa-seong City, Gyeonggi province was selected as the demonstration site. Based on the open operating system, BEMS, which can be easily applied to anyone, was introduced as an example by allowing data collection and monitoring of control points for building energy analysis without additional costs, except for sensor purchase and installation costs. The results of building energy data operation collected through BEMS Checker and Score, a service module for analyzing and diagnosing BEMS, were analyzed, and the service module algorithm was applied to derive the results of saving about 20% of building energy in 2019 compared to 2017. In conclusion, By applying the building energy consumption analysis, management, diagnosis, integrated control system, and facility performance analysis service module to the actual site, managers can efficiently utilize it and implement an economically excellent system.

태양열원 연계 지열원 히트펌프시스템의 최적 설계 및 운전 방안에 대한 연구

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6

carbon neutrality, “ZEB certification” and “mandatory installation of renewable energy systems” have ensured the inevitable introduction of renewable energy along with insulation and high-efficiency equipment systems for a reduction in building energy. Meanwhile, studies have been conducted on the use of various alternative renewable energy sources, such as sunlight, solar heat, ground heat, and fuel cells; however, it remains extremely difficult to apply them to the building sector, except for sunlight and solar heat energies, owing to regional restrictions. In the case of the geothermal source heat pump system, there is a problem of lowering heating performance due to a drop in underground temperature due to an imbalance in heating and cooling loads in domestic climate conditions. Therefore, the solar power system was selected as an auxiliary heat source to supplement the insufficient heat source during the heating period, and previous studies confirmed that the power consumption of the heat pump and the underground heat exchanger circulation pump can be reduced by improving the thermal environment of the heat source. However, since the solar power system requires a lot of initial investment costs, it is important to produce the optimal effect with the geothermal power heat pump system through efficient design and operation. Therefore, in this study, an analysis model was established based on the relational expression of the elements constituting the system for the optimal design and operation of the geothermal source heat pump system linked to solar sources, and a numerical analysis tool was prepared. The optimal design and operation conditions were derived through various parameter studies by analyzing the effect of system switching temperature from geothermal source to solar source through various numerical experiments. As a result of applying it to the target building, it was shown that it was possible to reduce power consumption by 25% compared to the case of using only a geothermal source.

태양열원 및 지열원 하이브리드 난방시스템 성능에 관한 연구

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6

Solar heat and geothermal heat are new and renewable energy sources that can significantly contribute to achieving zero-energy building mandates and reducing energy consumption in the building sector. In the case of the geothermal heat pump system, there is a problem in that the heating performance is deteriorated due to the drop in the underground temperature due to the imbalance of heating and cooling loads in domestic climatic conditions. The purpose of this study is to improve the long-term performance degradation of the geothermal heat pump system due to the imbalance in the cooling and heating load in Korea. To improve the primary side performance of the geothermal heat source heat pump through the solar heat source, we will examine the design plan of the solar heat source and geothermal heat source combined cooling and heating system. Also, It is can reduce the power consumption of the geothermal heat exchanger and the circulation pump of the underground heat exchanger. An empirical experiment was conducted on a medium-sized office building to evaluate the performance of the solar and geothermal heat and cooling system. As a result of analyzing the time change of the supply temperature of the representative heat pump heat source, which was operated in connection with the geothermal source and the solar source, the supply temperature and calories were improved. According to the COP analysis according to the supply temperature of the heat source, 4.8-6.0 for single operation of the geothermal source and 5.4 to 7.4 for linked operation of the solar power source, which resulted in improved performance of the heat pump.

건물에너지관리시스템(BEMS) 현장 적용을 통한 효과 분석 연구

황지현(Jihyun Hwang),이태원(Taewon Lee) 대한설비공학회 2018 대한설비공학회 학술발표대회논문집 Vol.2018 No.6

Building Energy Management System(BEMS) can be summarized as two requirements: installation cost reduction and effective function. However, there is no systematic analysis of the effects of BEMS in Korea and abroad. In particular, it is uncommon to see the savings on various energy consumption factors and analysis results based on long-term measurement data. In this study, the energy saving effects were summarized, analyzed from the energy consumption information obtained from the application and operation of BEMS. The testing site was composed of 25 buildings of located in Ilsan complex of Korea Institute of Civil engineering and building Technology(KICT). The test period was five years from 2013 to 2017. We applied various energy saving techniques through analysis of energy consumption and consumption rate by buildings and usage. As a result, over 23% of electric power could be saved in this site. However, the effect obtained through this study was obtained through the analysis and the reduction technique introduced by the effort of research team, so it was considered that the development of the algorithm and software in order to get satisfactory effects applied to the building site was urgent.

건물에너지관리시스템(BEMS) 현장적용 및 보급 확대방안 검토

황지현(Jihyun Hwang),송두삼(Doosam Song),이태원(Taewon Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-

For the purpose of wide spread of economical building energy management system(BEMS), field test of the prototype based on the new developed open type operating system was carried our. The K-laboratory in Hwa-seong City, Gyeonggi province was selected as the demonstration site. We selected optimal monitoring and control points, 115 points for electric power field and 61 points for machinery and renewable energy field, to minimize investment cost. Thanks to the open type operating system, BEMS can be easily applied and operated by anyone ignorant of Information and communication technology. As results various analyses were performed with field date collected for last two years using this system. For experimental and miscellaneous purposes, energy consumption was increased by 12.4% and 6.5% respectively, while the figure was decreased 12%, 5.6% and 1.4% respectively, for air-conditioning, business and commercial applications. Based on these basic findings, we’re going to develop various service modules for building equipments and systems, for example building energy consumption and performance analysis, fault detection and diagnosis, efficient operation and management and integrated control and so on.