• 한국환경복원기술학회지
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• 제22권1호
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• pp.13-31
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• 2019

Green spaces are recognised for the benefits. They bring to the quality of people's lives. However, since the 1980s there has been a general increase in poorly-managed green spaces. In an attempt to address this issue, green space policy has changed its focus on green space management through the gradual introduction of green space evaluation tools, such as the Green Flag Award (GFA). The GFA, as an established green space evaluation tool in the UK, reflects a shift in policy drivers of green spaces management. However, there is a lack of research investigating the contextualisation between a wide range of policy contexts and such green space evaluation tools (the GFA in this study). The aims of this study are therefore to explore the development of green space evaluation since the late 1990s, with respect to the growth of the GFA and its impact on other evaluation tools across the UK and several countries. To address the aims, this study employs in-depth literature reviews on UK green space policy mainly conducted by government. In addition, case studies are presented, focusing on the GFA and independent green space evaluation tools intrinsically derived from the GFA in the UK's cities and Nordic countries. Results show that based on the awareness of the severity of declining standards of green spaces, newly emerging policy arrangements have been adopted to address negative issues, which affect the standard of green spaces such as the transfer of responsibility for green space management, the implementation of Compulsory Competitive Tendering and ongoing budget cuts. Significantly, the GFA's indicators reflect the emerging changes of economic and social contexts associated with green spaces management where, in particular, the prospect of continuous budget cuts, which encourages communities to become involved in green space management. The GFA has widely contributed to leading such UK's cities and other countries to be able to create their independent green space evaluation tools in different approaches based on stakeholders' (mainly community) involvement in the decision-making process of green space evaluation. In conclusion, this study implies that successful green space evaluation tools do embody the value of green spaces and address drivers of emerging green space management with correspondence to the context of policy arrangements. Importantly, stakeholders have an opportunity to be involved in a partnership in the decision-making process through some green space evaluation tools. It is hoped that for well-managed green spaces this study will contribute valuable knowledge to our existing understanding of green space management in an era of austerity.

• 전자공학회논문지
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• 제50권3호
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• pp.212-218
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• 2013

본 논문에서는 SAR (Synthetic Aperture Radar) 영상에 SVD (Singular Value Decomposition) - Pseudo Spectrum 알고리즘을 적용하고 그 성능을 기존 알고리즘과 비교한다. 이 논문의 목적은 SAR 영상의 해상도 및 목표물 분해능을 높이고자 하는 것이다. 본 논문에서는 신호 성분으로 이루어진 Hankel Matrix와 SVD (Singular Value Decomposition) 방법을 사용하여 잡음에 강인하고 sidelobe이 적으며 스펙트럼 추정에서 해상도를 높인 SVD-Pseudo Spectrum 방법을 제안하였다. 또한 분해될 목표물을 모델링하여 알고리즘의 성능을 분석하고 SVD-Pseudo Spectrum 방법이 기존의 퓨리에 변환 기반 방법과 고해상도 기술 기반의 MUSIC 방법보다 더 좋은 성능을 가짐을 보인다.

• 동아시아식생활학회지
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• 제24권3호
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• pp.368-374
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• 2014

We investigated the physical and cooking properties of commercial noodles supplemented with functional ingredients. RVA (rapid visco analyzer), color, water activity, texture and cooking properties were tested. Noodles containing kudzu showed the highest initial gelatinization temperatures, whereas noodle containing kelp displayed the highest peak viscosity and set back. Holding strength and final viscosity were highest in noodles containing mugwort. The L value ($94.89{\pm}0.02$) of wheat flour noodle was the highest. Among functional noodles, L value ($88.65{\pm}0.01$) and a value ($7.42{\pm}0.02$) of cactus noodle were the highest, whereas b value of pumpkin noodle was $40.81{\pm}0.03$, which was higher value than in other noodles. Water activity of cactus noodle was highest (0.455), but the difference was not significant. Cooking properties (including weight, volume, and water absorption) and turbidity of pumpkin noodles showed the highest growth rate. In terms of texture, hardness was highest ($12836.8{\pm}7.1g/cm^2$) in green tea noodles, and cohesiveness and gumminess were highest in kelp and mugwort noodles. Considerig the quality characteristics of noodles supplemented with mulberry leaves, cactus, mugwort, green tea, pumpkin, kelp or kudzu, pumpkin noodles were most stable in terms of gelatinization and cooking properties.

• Journal of Power Electronics
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• 제19권1호
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• pp.288-295
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• 2019

Rectifiers are widely used in industrial applications. Although detailed models of rectifiers are usually used to evaluate their performance, they are complex and time-consuming. Therefore, the Average Value Model (AVM) has been introduced to meet the demand for a simple and accurate model. This type of rectifier modeling can be used to simplify the simulations of large systems. The AVM of diode rectifiers has been an area of interest for many electrical engineers. However, healthy diode rectifiers are only considered for average value modeling. By contrast, faults occur frequently on diodes, which eventually cause the diodes to open-circuit. Therefore, it is essential to model bridge rectifiers under this faulty condition. Indeed, conventional AVMs are not appropriate or accurate for faulty rectifiers. In addition, they are significantly different in modeling. In this paper, a novel application of the parametric average value of a three-phase line-commutated rectifier is proposed in which one diode of the rectifier is considered open-circuited. In order to evaluate the proposed AVM, it is compared with experimental and simulation results for the application of a brushless synchronous generator field. The results clearly demonstrate the accuracy of the proposed model.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 가을 학술논문 발표대회
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• pp.234-235
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• 2021

We set the representative balcony types of the existed building to two types: unexpanded balcony and extended balcony, and analyze the effect of reducing the cooling and heating energy load when applying remodeling. The scope of the study was limited to balcony walls, including window-wall junctions, and was conducted by comparing cases with and without thermal break insulation structures for a clear conclusion. The study was conducted using the equivalent U-value in each case. The equivalent U-value was calculated by deriving through 2 dimensional steady-state heat transfer analysis of each case balcony envelope. And building energy was calculated using the derived equivalent U-value. According to the calculation results, for unexpanded balconies, the equivalent U-value was reduced by about 80%, and the heating and cooling load was reduced by about 20%. In the case of extended balconies, the equivalent U-value was reduced by about 57% and the resulting heating and cooling load was reduced by about 12%.

• 전자공학회논문지
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• 제50권3호
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• pp.91-101
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• 2013

본 논문에서는 적록색각 이상자를 위한 색 변환 알고리즘을 제안한다. 적록색각 이상자는 원추세포의 이상으로 인해 색상과 명도를 일반인과 다르게 인지하기 때문에 적색과 녹색의 구분에 어려움을 겪는다. HSV 색공간은 이러한 특성을 파악할 수 있는 인간의 색지각과 유사한 색 공간으로, 제안하는 방법에서는 HSV 색 공간에서 색상과 명도를 보정하여 색을 변환 한다. 이때 색상과 명도 보정정도는 개개인의 색각이상 심각도에 따라 다르게 결정된다. 색각 이상자 개개인에 따라 다른 보정정도를 적용함으로서 기존 이미지의 자연스러움은 유지 하고 구분하기 힘들었던 색상들도 구분 가능하게 변환된다. 제안하는 방법을 색각 이상자에게 적용하여 시뮬레이션으로 확인한 결과, 색각 이상자가 구분하기 힘든 색상들이 색상의 자연스러움을 유지하면도 색차를 인지할 수 있는 색으로 변환되는 것을 확인할 수 있었다.

• 한국건축시공학회지
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• 제18권5호
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• pp.463-469
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• 2018

기존의 다층으로 구성되어 시공성이 낮은 옥상녹화 공법의 개선을 위해 개발한 방수 방근 시트 일체화 옥상녹화박스 유닛공법의 일체화를 위해 사용하는 전자기 유도가열방식의 금속 고정구와 콘 형상 고정구의 부착성능을 평가하기 위해 엔지니어링 PE, TPO, PVC 시트 등 3종류의 시트에 가열온도에 따른 부착성능 및 동일한 시험체로 냉열반복 후 부착성능을 측정하였다, 그 결과는 엔지니어링 PE시트에 부착한 고정구의 부착성능이 가장 우수하게 나타났으며, 금속고정구는 가열온도가 올라갈수록, 콘 형상 고정구는 가열온도가 낮을수록 우수한 부착성능을 보여주었고, 냉열 반복 후 부착시험 결과는 상온 부착시험 결과와 동일하게 나타났다. 기존의 양면 부틸테이프 고정방식의 콘 형상 고정구는 낮은 부착하중과 냉열반복에 의한 뚜렷한 성능저하가 발생하는데 비하여 전자기 유도가열방식의 고정구는 우수한 성능을 유지하였다.

• 한국식품영양과학회지
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• 제7권2호
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• pp.35-42
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• 1978

General components of comfrey collected during the period of July-September 1978 in Pusan area were investigated with a view to determine its possible value as a foodstuff by means of titrimetry, chromometric analysis and fluorometric analysis. As a result, the following data were obtained. 1) The contents of moisture, crude lipid, crude protein and carbohydrates of the comfrey were similar to those of other green vegetables such as spinach, crowndaisy, lettuce, leek and mallow. 2) The inorganic Ca, P and Fe of the comfrey were fairly greater in contents than those of other green vegetables. Compared with spinach, for instance, there were 4 times as much Ca and about 2 times as much Fe in it, respectively. 3) The contents of vitamins of the comfrey were also found in an amount much greater than those of other green vegetables. V-A of the comfrey, for instance, were 6 times greater in content than that of lettuce, and about 2 times greater than that of crowndaisy, leek and mallow, respectively. It also showed a greater content of V-A than even that of spinach, known as a vegetable most rich in V-A. V-B of the comfrey showed a little lower level of content than that of spinach but showed about the same level of content as that of leek and lettuce. V-B of the comfrey was 6 to 8 times greater in content than that of lettuce and leek. The content of niacin of the comfrey was also found much greater than those of other foodttuffs. V-C of the comfrey compared 3.5 times greater with that of lettuce, 2 times greater with that of mallow, and generally a higher level with those of other green vegetables. The above findings seem to firmly establish the food scientific value of the comfrey. Furthermore, the vegetable is very prolific and grows easily. If the general public is made aware of these facts, the vegetable is thought to contribute not a little to their dietary life as a nutritious foodstuff.

• 한국양식학회지
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• 제7권3호
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• pp.135-150
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• 1994

은어의 효과적인 인공 종묘 생산을 위하여 자어의 성장과 생존율에 대한 먹이생물의 영양 가치에 대해 실험하여 다음과 같은 결과를 얻었다. 자어의 rotifer type에 따른 먹이효율을 조사하기 위해 3개 rotifer type (L-type, S-type, Us-type rotifer)을 각각 단독 또는 혼합하여 공급하였을 때 자어의 생존율은 모든 실험구에서 차이가 없었으나, 성장은 3 개 type rotifer를 모두 혼합하여 공급한 실험구에서 가장 높았다. Rotifer와 Artemia nauplius를 Chiorefla effipsoidea, 유지효모, 건조분말 Spimlina Platenis, Super Selco로 영양 강화시켜 자어에 공급한 영양 강화 실험에서 건조분말 S. platenis와 Super Selco를 혼합하여 영양 강화시킨 실험구에서 가장 높은 성장과 생존율을 보였다. Rotifer와 Arremia nauplius 공급시 자어의 사육 수조에 green water의 효과를 조사하기 위해 Chforefia ellipsoidea, 건조분말 Spimfina platensis, 광합성 세균(Rhodopseudomonas capsulatus)을 green water 원으로 사용하였을 때 건조분말 Sprinlina platenis와 광합성 세균을 혼합하여 공급한 실험구에서 가장 높은 성장과 생존율을 나타냈다.

• 한국환경복원기술학회지
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• 제4권3호
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• pp.75-83
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• 2001

This study selected Yangpyung as a target site because Yangpyung is a area of high value blessed with well preserved natural resources and beautiful natural scene and where thoughtless development and malformed use of land are in progress under the mask of hotel, accommodations and sales facility which fits the interests of land owner. As for the method used for this study, I inquired into domestic/international instances and the concept of existing environmental indicators and assessment of suitability with a view to establish assessment indicators and pose the concept through theoretical investigation of green-network and to establish green-network. 17 articles of environmental indicators such as aspect analysis, contour, greenbelt, DEM, NDVI, nature conservation area, reservoir and area for the promotion of agriculture were chosen as a actual analysing n data for setting up assessment indicators. From the result of analysis, as anticipated, green zone in Yongmusan areas within Youngmun and Seojong areas were the center of green-network in the wide area green-network in Yangpyung and the restricted area by basin system, road and legal regulation was selected as spot area and finally arable land and reservoir were selected as base which connects core with spot.