Carbon reduction and planning strategies for urban parks in Seoul

Jo, Hyun-Kil,Kim, Jin-Young,Park, Hye-Mi Elsevier 2019 Urban forestry & urban greening Vol.41 No.-

<P><B>Abstract</B></P> <P>This study quantified carbon storage and uptake for urban parks in Seoul, the capital of the Republic of Korea. A total of 38 study parks were selected using a systematic random sampling method and all the trees in the parks were field-inventoried. Carbon storage and uptake by the park trees were estimated applying a quantitative model for urban open-grown trees of each species. Mean carbon storage per unit of park area, basal area, and crown cover by the trees was 38.5 ± 3.0 t/ha, 27.3 ± 0.8 kg/100 cm<SUP>2</SUP>, and 7.4 ± 0.4 kg/m<SUP>2</SUP>, respectively. Annual carbon uptake per unit area and cover by the trees averaged 3.5 ± 0.2 t/ha/yr, 2.5 ± 0.1 kg/100 cm<SUP>2</SUP>/yr, and 0.7 ± 0.0 kg/m<SUP>2</SUP>/yr, respectively. The major determinants of the levels of carbon storage and uptake were species, density, sizes, and layering structures of the planted trees. The trees across all urban parks in Seoul were estimated to store 222.3 kt of carbon and to annually sequester 20.2 kt of carbon. The trees in these parks played an important role in annually offsetting carbon emissions from gasoline consumption by approximately 2.3% of the total population of the city. The economic value of the annual carbon uptake, which was $7.1million/yr, equaled 15.1% of the annual maintenance budget of the parks in the city. However, the role of study parks as a source of carbon uptake was limited due to the distribution of large grass and impervious areas, the single-layered structures, and the dominance of small trees. Planning strategies were explored to enhance carbon reduction effects of the parks. They included the expansion of tree planting spaces through the minimization of unnecessary grass and paving areas, the active tree planting in the potential planting spaces, the multi-layered planting grouped with larger trees, and the planting of tree species having satisfactory growth rates. This study puts an emphasis on finding out the present carbon offset levels of urban parks on which information is limited and suggesting a future direction of park planning based on a detailed actual survey.</P>

도시공원 열환경 실측과 근린주민 의식조사에 따른 체감열 특성 평가

박선영(Park, Sun-Young),주진희(Ju, Jin-Hee),윤용한(Yoon, Young-Han) 한국도시설계학회 2009 도시설계 : 한국도시설계학회지 Vol.10 No.4

본 연구는 청주시에 위치한 도시공원을 대상으로 기온·습도ㆍ풍향ㆍ풍속 및 산소 등 여름철 도시공원이 내포하고 있는 열섬저감효과를 실측하고, 근린주민을 대상으로 설문을 실시하여 체감열에 대한 의식조사를 수행하였다. 이에 열환경 실측과 근린주민 의식조사의 결과를 비교·검토하여 근린주민의 체감의식까지 수용된 실측결과를 바탕으로 실제 공원의 배치 및 식재설계 등 계획에 입안할 수있는 기초자료를 제공함을 목적으로 한다. 연구결과는 다음과 같다. 공원 주변의 기온저감효과와 영향범위, 공원의 쾌적감, 냉량감 및 청정감 등의 항목에서 기온의 실측데이터와 주민의식조사를 비교한 결과, 풍향을 중심으로 풍상측과 풍하측을 구분한 실측 및 의식조사의 결과를 제외하고 공원의 규모가 클수록, 공원으로의 거리가 가까워질수록 거주하는 근린주민은 쾌적감을 느낀다고 응답하였다. 따라서, 도시공원에 대한 열섬현상 완화를 고려해 같은 규모의 공원일 경우, 분산 배치하는 것이 좋으나 공원규모가 클수록 풍하측 기온저감의 영향범위가 넓어지는 경향을 나타내 공원 규모의 확대가 중요함을 보여주고 있다. This study has investigated the air temperature, humidity, wind direction, wind velocity and oxygen in urban parks in Cheong-ju. Heat-island temperature decrease effect in urban parks during summer was measured, and the sensible consciousness of neighborhood residents was investigated through a questionnaire survey. Based on the actual results after comparatively analyzing the measurement of thermal environment and sensible consciousness of neighborhood residents, basic data are presented to elaborate on the urban development plans such as for park placement and planting design. The study result showed that neighborhood residents felt greater comfort sensation when they are closely located to a larger park. When actual temperature data and sensible consciousness of neighborhood residents were compared in terms of temperature decrease effect and extent, comfort sensation, coldness sensation, and cleanliness sensation, similar results were observed in almost all categories except for wind direction which was divided into windward and leeward. Therefore, the significance of this paper is that its results can be used to elaborate realistic and practical park development and management plans in green network and resident’s use of parks.

국립공원 주요 아고산대 상록침엽수(구상나무, 분비나무) 고사현황 조사 : 설악, 덕유, 지리산국립공원을 대상으로

김진원(Jin-Won Kim),전자영(Ja-Young Jeon),박홍철(Hong-Chul Park) 국립공원연구원 2021 국립공원연구지 Vol.12 No.2

우리나라 구상나무 및 분비나무군락은 한라산을 제외하면 백두대간 마루금을 중심으로 국립공원 고지대에 대부분 분포하고 있으며, 구상나무는 지리산과 덕유산국립공원, 분비나무는 설악산국립공원에 비교적 넓은 면적이 분포한다. 따라서 두 수종에 대한 생육상태를 파악하고 모니터링하는 것은 국립공원 자연자원의 보전 측면에서 중요하다. 본 연구에서는 지리산, 덕유산, 설악산국립공원 내 서식 중인 구상나무와 분비나무군락에 대한 수년간의 고사실태를 파악하고자 하였으며, 이를 바탕으로 국립공원 아고산생태계의 과학적 보전 및 관리를 위한 토대를 마련하고자 하였다. 2009년부터 2020년까지 상록침엽수 고사현황을 조사한 결과, 지리산국립공원과 덕유산국립공원의 구상나무 고사 및 쇠퇴현상은 매년 나타나고 있으며, 2014년과 2015년에 상대적으로 높은 고사율을 나타냈다. 설악산국립공원의 분비나무 역시 편차는 있지만 구상나무와 마찬가지로 고사현상이 확인되고 있으며, 특히 관모능선과 설악폭포 지역의 고사현상이 지속되고 있다. 설악산 또한 2012년와 2014년에 상대적으로 사율이 높게 나타났지만 전반적으로 큰 차이는 없는 것으로 판단된다. 특정 연도에 고사율이 상대적으로 높게 나타난 요인으로는 태풍, 가뭄, 홍수, 강풍 등과 같은 기상이벤트에 의한 영향이 작용한 것으로 판단된다. 따라서 본 연구의 결과를 바탕으로 기상이벤트와의 관계성을 파악하는 후속연구가 필요한 것으로 판단되며, 이를 객관적으로 규명하기 위해서는 더욱 장기적인 모니터링 자료가 뒷받침되어야 한다. Excluding Hallasan National Park, Abies koreana and Abies nephrolepis communities are mostly distributed in the high elevation of the National Park on Baekdudaegan mountain. Abies koreana is distributed in Jirisan and Deogyusan National Park, and Abies nephrolepis is distributed in Seoraksan National Park. Therefore, grasping and monitoring the growth status of both species is important in terms of conservation of natural resources in Korea National Parks. In this study, we attempted to find out the mortality of Abies koreana and Abies nephrolepis inhabitant. The mortality and decay of Abies koreana in Jirisan National Park and Deogyusan National Park occur every year, with relatively high mortality rates in 2014 and 2015. Abies nephrolepis in Seoraksan National Park are also different, but the death phenomenon has been confirmed like Abies koreana. In particular, the death phenomena in the Gwanmo Ridge and Seorak Falls continue to occur. In addition, although the mortality rate was relatively high in 2012 and 2014, there is no significant difference overall. As a factor in which the mortality rate was relatively high in a specific year, it is assumed that the influence of meteorological events such as typhoons, droughts, floods, and strong winds. Therefore, based on the results of this study, it is recommended that a follow-up study is needed to grasp the relationship with the meteorological event, and longer-term monitoring data should be supported in order to objectively investigate this assumption.

A Case of Urethral Stent for Recurrent Urethral Stricture and Penile Prosthesis for Erectile Dysfunction

Jung, Gyung-Woo,Song, Young-Jin,Park, Young-Ho,Kwon, Heon-Young,Yoon, Jin-Han 동아대학교의과대학 1992 동아의대학술지 Vol.4 No.1

AN IN-SITU YOUNG'S MODULUS MEASUREMENT TECHNIQUE FOR NUCLEAR POWER PLANTS USING TIME-FREQUENCY ANALYSIS

Choi, Young-Chul,Yoon, Doo-Byung,Park, Jin-Ho,Kwon, Hyun-Sang Korean Nuclear Society 2009 Nuclear Engineering and Technology Vol.41 No.3

Elastic wave is one of the most useful tools for non-destructive tests in nuclear power plants. Since the elastic properties are indispensable for analyzing the behaviors of elastic waves, they should be predetermined within an acceptable accuracy. Nuclear power plants are exposed to harsh environmental conditions and hence the structures are degraded. It means that the Young's modulus becomes unreliable and in-situ measurement of Young's modulus is required from an engineering point of view. Young's modulus is estimated from the group velocity of propagating waves. Because the flexural wave of a plate is inherently dispersive, the group velocity is not clearly evaluated in temporal signal analysis. In order to overcome such ambiguity in estimation of group velocity, Wigner-Ville distribution as the time-frequency analysis technique was proposed and utilized. To verify the proposed method, experiments for steel and acryl plates were performed with accelerometers. The results show good estimation of the Young's modulus of two plates.

AN IN-SITU YOUNG’S MODULUS MEASUREMENT TECHNIQUE FOR NUCLEAR POWER PLANTS USING TIME-FREQUENCY ANALYSIS

YOUNG-CHUL CHOI,DOO-BYUNG YOON,JIN-HO PARK,권휴상 한국원자력학회 2009 Nuclear Engineering and Technology Vol.41 No.3

Elastic wave is one of the most useful tools for non-destructive tests in nuclear power plants. Since the elastic properties are indispensable for analyzing the behaviors of elastic waves, they should be predetermined within an acceptable accuracy. Nuclear power plants are exposed to harsh environmental conditions and hence the structures are degraded. It means that the Young’s modulus becomes unreliable and in-situ measurement of Young’s modulus is required from an engineering point of view. Young’s modulus is estimated from the group velocity of propagating waves. Because the flexural wave of a plate is inherently dispersive, the group velocity is not clearly evaluated in temporal signal analysis. In order to overcome such ambiguity in estimation of group velocity, Wigner-Ville distribution as the time-frequency analysis technique was proposed and utilized. To verify the proposed method, experiments for steel and acryl plates were performed with accelerometers. The results show good estimation of the Young’s modulus of two plates.

고령자 급성 췌장염의 임상적 고찰

이진헌,강진경,박인서,송건훈,정재복,백용한,송시영,서정훈 대한소화기학회 1998 대한소화기학회지 Vol.32 No.3

Background/Aims: Inflammatory diseasas of the pancreas are not uncommon. The advanced age is one of the significant factors in assessing the severity of acute pancreatitis. It has been shown that the biliary tract disease is a more frequent cause of acute pancreatitis in the elderly than in the young. With the increased life span, the elderly are comprising a large proportion of the population. As a result, physicians are more often being faced with acute pancreatitis in the elderly. The purpose af this study was to evaluate clinical features of acute panereatitis in the elderly. Methods: A total of 188 patients with acute pancreatitis were reviewed. We investigated the differences of clinical characteristics between the elderly patients aged over 60 and the young patients aged under 60. Results: The sex distribution showed male preponderance in the young patients (M:F=2.4:1), but was nearly equal in the elderly patients (M:F=1.1:1). The most common cause of acute pancreatitis in the elderly was biliary tract disease (52.5%), while alcohol abuse was the most common cause in the young patients (38.8%), Local complications of acute pancreatitis, such as psuedocyst, necrosis, abscesses were not differently shown between the elderly (16.9%) and the young (20.2%) patients. Systemic complications including acute puhnonary failure occurred more frequently in the elderly patients than the young patients. The mortality rate of the elderly patients (5.1%) was not significantly different from that of the young patients (3.1%). Conclusions: To detect correctable underlying bihary tract diseases the elderly patients with acute pancreatitis should be completely investigated using endoscopic retrograde cholangiopancreatography (ERCP). In addition, the patient should be closely monitored for the development of the systemic complications during the disease process.

韓國産 野生草花에 관한 硏究 : 동의나물, 모데미풀, 피나물을 中心으로 With special reference to Caltha plaustris var. membrancea, Megaleran-this saniculifolia, Hylomecon vernale

申永澈,金在佶,李東珍,朴永達 충북대학교 농업과학기술연구소 1995 農業科學硏究 Vol.12 No.2

The primary purpose of this study is to investigate user's recreation experience satisfication and user's evaluation of forest landscape in Uam natural park. Another purpose of this study is to suggest directions for enhancing forest scenic beauty for every seasons. The data were collected by self- administered questionnaires from 182 users is SAM- IL park where main entrance of the Uam park. This study primarily consists of two phases : 1. The presentation of users' characterics. 2. The analysis of forest landscape in natural park. The majority of the respondents(68.3%) Prefered to reforestation. They also perceived that the scenic beauty of the park was satisfactiory. There were differences in users' satisfaction levels of scenic beauty for the park due to their socio-economic background.

기계식 주차설비 관제정산 시스템 개발

최동진,김태효,박영석 慶南大學校 附設 工業技術硏究所 1999 硏究論文集 Vol.17 No.-

본 논문에서는 기존 주차설비 자동화 기술의 문제점을 극복하기 위해서 자동 주차타워 관리용 관제정산 시스템의 객체지향 개발접근법을 제시한다. 개발된 주차설비 관제정산 시스템은 주차설비 제어장치와 정산 장치를 직렬 통신으로 결합한 하드웨어와 관제정산 소프트웨어로 구성된다. 관제정산 소프트웨어는 GUI 환경 하에서 객체지형 분석법을 통해 설계되고 Delphi 개발도구를 통해 구현되었다. 기존 시스템과는 달리 주차설비 조작, 주차증발행 및 인식, 요금정산 등을 일체화함으로써 사용상의 번거로움과 불편을 해소하고, 주차설비의 작동상태를 실시간으로 모니터링함으로써 높은 안전성을 제공한다. 또한 주차차량정보 및 주차관리기능을 통해서 주차 요금정산의 정확성 및 신뢰성 향상을 크게 기대할 수 있다. In this paper. in order to overcome the problems of the current automated parking systems, we propose an object-oriented development method of the control and account system for the management of automated parking tower. The developed system consists of the hardware, including the account unit and the parking control unit, and the control and account software. The hardware units are connected by serial communication line. The control and account software was designed through the object-oriented analysis approach and implemented by using Delphi development tool under GUI environment. Our system can minimize the difficulties and inconvenience of the use because of functioning as a total system, and provide the high safety of the parking operation by monitoring the parking status in real time. A1so it can greatly improve the correctness and reliability of accounting the parking fee.

가속도계를 이용한 재료의 영계수 측정방법

손창호(Sohn, Chang-Ho),박진호(Park, Jin-Ho),윤두병(Yoon, Doo-Byung),정의필(Chong, Ui-Pil),최영철(Choi, Young-Chul) 한국소음진동공학회 2006 한국소음진동공학회 논문집 Vol.16 No.11

For the description of the elastic properties of linear objects a convenient parameter is the ratio of the stress to the strain, a parameter called the Young's modulus of the material. Young's modulus can be used to predict the elongation or compression of an object as long as the stress is less than the yield strength of the material. Conventional method for estimating Young's modulus measured the ratio of stress to corresponding strain below the proportional limit of a material using a tensile testing machine. But the method needs precision specimens and expensive equipment. In this paper, we proposed method for estimating Young's modulus using accelerometer. The basic idea comes from that the wave velocity is different as the Young's modulus. To obtain Young's modulus, a group velocity is obtained. It is difficult to measure group velocity. This is because plate medium has a dispersive characteristics which has different wave speed as frequency. In this paper, we used Wigner-Ville distribution to measure group velocity. To verify the proposed method, steel and acryl plate experiments have been performed. Experimental results show that the proposed method is powerful for estimating Young's modulus.