• 한국환경과학회지
• /
• 제29권4호
• /
• pp.371-382
• /
• 2020

This study was conducted to suggest a management plan for legally protected trees in Gwangju, Gyeonggi-do by examining their distribution and growth. A literature review and field survey of these trees were conducted to derive problems and usage plans, with a number of key results. Among the legally protected trees (77 species in total) in 74 locations within Gwangju, Gyeonggi-do, the growth status of 74 species (96.10%) was above average, indicating that most legally protected trees were growing without any issues. Despite the results, analysis of the function of these legally protected trees indicated that there was low diversity and utilization of these trees as only trees in 33.77% were used as resting places or pavilions while those in 66.23% were used for landscaping or other purposes. It was assumed that these legally protected trees and the areas surrounding them in Gwangju, Gyeonggi-do will be used as community spaces if the environment is improved. This includes converting these areas into small parks or resting places for residents. In addition, further research should be carried out to maintain good growth conditions for these legally protected trees in general and to explore various plans that allow utilization of the surrounding natural ecosystem, human environment, and cultural elements in order to enhance the quality of the region and improve it as a living space for residents.

• Journal of the Optical Society of Korea
• /
• 제20권1호
• /
• pp.88-93
• /
• 2016

Recently laser speckle contrast (LSC) imaging has become a widely used optical method for in vivo assessment of blood flow in the animal brain. LSC imaging is useful for monitoring brain hemodynamics with relatively high spatio-temporal resolution. A speckle contrast imaging system has been implemented with electrical sensory stimulation apparatus. LSC imaging is combined with optical intrinsic signal imaging in order to measure changes in cerebral blood flow as well as neural activity in response to electrical sensory stimulation applied to the hindlimb region of the mouse brain. We found that blood flow and oxygen consumption are correlated and both sides of hindlimb activation regions are symmetrically located. This apparatus could be used to monitor spatial or temporal responses of cerebral blood flow in animal disease models such as ischemic stroke or cortical spreading depression.

• Korean Membrane Journal
• /
• 제10권1호
• /
• pp.46-52
• /
• 2008

Optimization of ionomer solution was conducted in order to improve the performance of MEAs in PEMPC. The interface between membrane and electrodes in MEAs is crucial region determining fuel cell performance as well as ORR reaction at cathode. Through the modification of Nafion ionomer content at the interface between membrane and electrodes, an optimal content was obtained with Nafion 115 membranes. Two times higher current density was obtained with the outer Nafion sprayed MEA compared with the non-sprayed one. In addition, the symmetrical impedance spectroscopy mode (SM) exhibited that the resistances of membrane area, proton hydration, and charge transfer decreased as the outer Nafion is sprayed. From the polarization curves and SM, the highest current density and the lowest resistance was obtained at the outer ionomer content of $0.15\;mg\;cm^{-2}$.

• Parasites, Hosts and Diseases
• /
• 제58권5호
• /
• pp.559-564
• /
• 2020

A survey of rodents and chiggers associated with Orientia tsutsugamushi was conducted in a rural region of the Republic of Korea (Korea) between 2014 and 2018. Overall Apodemus agrarius 15.2% had the highest seropisitive for O. tsutsugamushi, followed by Myodes regulus 11.4%. Monthly risk factors using logistic regression analysis were not associated with O. tsutsugamushi infections in rodents. The overall prevalence rate of O. tsutsugamushi among chiggers was 0.3%. The chigger (Leptotrombidium scutellare) and monthly (October) risk factors were associated with O. tsutsugamushi human infections (P<0.05). Orientia tsutsugamushi infections are endemic in rodents in Korea and people, for example, soldiers who are active outdoors, must employ preventive measures, especially during October (P<0.05). When there are many reports of O. tsutsugamushi infections in Korea. The Boryong strain 85.7% (2/14) was the most common strain detected in chiggers, followed by the Shimokoshi 7.1% (1/14) and Karp 7.1% strains.

• 한국작물학회지
• /
• 제28권3호
• /
• pp.368-373
• /
• 1983

본 시험은 1978년부터 1979년까지 2개년간 수원과 광주에서 소맥 “조광”을 공시하여 파종기를 달리하였을 때 등숙기간중 립중의 경시적인 증가양상과 품질의 변이에 관하여 등숙기간별로 추적조사한 바 그 결과를 요약하면 다음과 같다. 1. 출수기는 지역간에는 수원에서 파종기차이에서는 적기파종에서 빨랐으나 년차간에는 차이가 없었으며 출수까지의 일수는 지역 및 파종기에 따라 변이가 비교적 커서 수원에서 225-207일, 광주는 192-176일이 소요되었다. 2. 등숙전기의 립중은 광주에서 보다 수원에서 무거웠으나 최종 립중은 반대로 광주에서 높았다. 3. 등숙일수는 년차변이가 커서 수원에서 적기파종한 경우는 43-49일, 광주는 44-51일이었으며 만기파종은 동일지역내에서 적기파종에 비해 1-4일이 단축되었다. 4. 제분율은 지역간에는 광주에서, 파종기간에는 적기파종에서 다소 높았으며 등숙일수에 따라서는 등숙이 진전됨에 의해 증가하여 만기파종에서는 출수후 45일에 최대가 되었으나 적기파종에서는 45일이후까지 경미한 증가경향을 보였다. 5. 단백질함량과 심전가는 제분율과는 반대로 고온하에서 등숙이 이루어진 북부지방에서, 파종기에 따라서는 만기파종에서 높았으며 등숙기간별로는 일양적인 경향이 없었다.

• 식물분류학회지
• /
• 제37권1호
• /
• pp.41-59
• /
• 2007

경기도 북부지역에 자생하는 관속식물은 145과 656속 2,030(1,611종 7아종 320변종 1아변종 91품종) 분류군이며 이중 한국특산식물은 46과 85속 138분류군이 분포한다. 식물구계학적 특정식물은 총 416분류군이 분포하는 것으로 나타났다. V등급종은 18분류군, IV등급종은 79분류군, III등급종은 111분류군, II등급종은 80분류군, I등급종은 128분류군이 분포한다. 귀화식물은 23과 114분류군이 확인됐다. PCA의 결과, 경기 북부지역의 동부에 위치하는 광주산맥계는 소산식물, 특산식물, 식물구계학적 특정식물, 희귀 및 멸종위기식물 등에 있어서 서부저지대에 비해 종다양성이 높으며, 특히 화악산-명지산-운악산-광릉-북한산으로 이어지는 일련의 축에서 800분류군 이상이 자생하고 있어 식물다양성이 매우 높은 곳으로 나타났다. 따라서 종다양성 보존을 위한 핵심 축으로서 광주산맥계를 지역으로 고립화하기보다는 생태축으로 연결해 보존지역화 하여 생태계 보존네트워크의 축이 되도록 하는 것이 필요하다.

• 도시과학
• /
• 제9권2호
• /
• pp.21-30
• /
• 2020

The purpose of this study is to present a plan to distinguish 229 local governments nationwide by taking into account various characteristics such as population, employment, housing, and industry of the region for customized urban policies in the era of metropolitan areas. The National Statistical Portal (KOSIS) collected and standardized data related to population, housing, industry, and finance by region from 2000 to 2015 for the classification of regional types necessary for customized urban policies, and this was used to classify them into regional types that considered population, employment, housing and industry. The summary of the analysis results is as follows. First, as a result of the regional type classification, 10 key employment sites (4.4%), 5 employment centers (2.2%), 38 residential centers (16.6%), 20 growth areas (8.7%), 26 industrial cities (11.4%), 35 low-fertile farming and fishing villages (15.3%) and 95 stagnant areas (41.5%). Second, the Seoul metropolitan area is the most diverse type of metropolitan area in the country, with most of its core employment sites inside Seoul, residential centers inside and outside Seoul, and growth areas in the southeastern part of the country (Busan, Ulsan, and Gyeongsangnam-do) are mixed with industrial and growth areas centered around Busan, Ulsan and surrounding areas, while the rest of the local governments are found to be low-fertile farming villages or stagnant areas. Daegu (Daegu, Gyeongbuk) is an industrial city in Daegu, and the rest of the local governments are either low-density farming and fishing villages or stagnant areas. The Honam region (Gwangju and Jeolla) was found to be a low-mill farming and fishing village or stagnant area except for Gwangju, while the Chungcheong region (Daejeon, Sejong, and Chungcheong) was seen as a growth area with areas adjacent to Daejeon, Sejong, and the Seoul metropolitan area, and some industrial cities were included. Finally, the Gangwon area was mostly classified as low-density farming and fishing villages and stagnant areas.

• Journal of Computational Design and Engineering
• /
• 제2권1호
• /
• pp.26-37
• /
• 2015

A lot of researchers have been investigating interactive portable projection systems such as a mini-projector. In addition, in exhibition halls and museums, there is a trend toward using interactive projection systems to make viewing more exciting and impressive. They can also be applied in the field of art, for example, in creating shadow plays. The key idea of the interactive portable projection systems is to recognize the user's gesture in real-time. In this paper, a vision-based shadow gesture recognition method is proposed for interactive projection systems. The gesture recognition method is based on the screen image obtained by a single web camera. The method separates only the shadow area by combining the binary image with an input image using a learning algorithm that isolates the background from the input image. The region of interest is recognized with labeling the shadow of separated regions, and then hand shadows are isolated using the defect, convex hull, and moment of each region. To distinguish hand gestures, Hu's invariant moment method is used. An optical flow algorithm is used for tracking the fingertip. Using this method, a few interactive applications are developed, which are presented in this paper.

• 방송공학회논문지
• /
• 제13권5호
• /
• pp.596-601
• /
• 2008

본 논문은 저해상도의 깊이 카메라와 고해상도의 양안식 카메라를 결합한 복합형 카메라 시스템에서 관심영역(region of interest, ROI)이 향상된 깊이맵을 생성하는 새로운 방법을 제안한다. 제안하는 방법은 깊이 카메라로 획득한 깊이 정보를 3차원 워핑(warping)하여 좌영상의 ROI 깊이맵을 생성한다. 그런 다음, 양안식 카메라로 획득한 좌우영상의 배경 영역을 스테레오 정합하여 좌영상의 배경 깊이맵을 생성한다. 최종적으로, ROI 깊이맵과 배경 깊이맵을 결합하여 최종 깊이맵을 생성한다. 제안하는 방법으로 생성한 고해상도 깊이맵은 기존의 스테레오 정합 방법보다 ROI에 정확한 깊이 정보를 제공한다.

• 한국농촌건축학회논문집
• /
• 제14권4호
• /
• pp.125-133
• /
• 2012

This study intended to interpretate the current value of the cultural landscape resources in Gwansan region, Gwangju-si. The 35 significant cultural landscape resources in Gwangsan region appear education, people in history, living residence, religion & belief, distribution of cultural site, tomb, industry, topographic scenery characteristics. They are classified such as 22 traditional landscape resources, 7 modern landscape resources, 6 natural landscape resources. The significant cultural landscape resources were evaluated by value items of 4 natural landscape, 4 social, and 5 cultural. As a result of value evaluation on the cultural landscape resources in Gwangsan region, the highest value were appeared on the cultural items, while the lowest value were appeared on the social items. And high evaluation were appeared on regional identity, cultural preservation, regional monumentality, visibility, while low evaluation were appeared on unique naturality and connectivity of assets.