• 한국정보과학회:학술대회논문집
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• 한국정보과학회 1999년도 가을 학술발표논문집 Vol.26 No.2 (3)
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• pp.333-335
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• 1999

유해한 이동코드는 웹 환경에서 흔히 발견될 수 있으며 시스템에서 적재되어 시스템 자원을 독점한다거나 부적절한 방법을 자원을 탐직하는 등의 불법적인 활동을 한다. 따라서 이러한 유해 이동 코드를 차단하기 위한 여러 가지 방법 즉, Firewall이나 Code Signing, SandBox, Playground등과 같은 보안 메커니즘이 제안되어졌으나, 이러한 보안 메커니즘들은 이동 코드들에 대한 유해성 여부를 판단할 수 없고 또한 제한적인 실행으로 이동 코드의 효율성을 저하시키는 단점들을 내포하고 있다. 본 연구에서는 유해한 이동 코드를 진단.분석하고 이동 코드 실행을 탐지.차단 할 수 있는 탐지 소프트웨어를 개발하고자 한다.

• 한국생활과학회지
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• 제15권6호
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• pp.919-935
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• 2006

The purpose of this study was to analyze the relationship between outdoor play environments and child's play behaviors. The data were collected by field measurement survey, and non-participatory observation from 9 child care centers in Daejeon. The field measurement survey were conducted from June 20 to July 20, 2004, whereas non-participatory behavior observation were conducted from September 2 to October 10, 2004. The major results showed the following. 1) The characteristics of outdoor play environment in child care centers showed that most of them were too small and did not use the adequate surfacing to play various activities. In many cases, outdoor play settings was made of play equipment setting, play props and manipulative settings, and tree/vegetation. 2) Child's play behavior has been focused on functional play activity and construction play activity. 3) The relationship between outdoor play environments and child's play behaviors showed that small outside play environment with monotonous construction and multi-complex play equipments produced functional play behaviors on children. On the other hand, where various play areas were put together, we could observe relatively diverse play behaviors. However, in some cases, despite the small and monotonous play area, diverse play behaviors were observed. These playgrounds at least differed from others in that they provided the place where multi purpose play was possible. This finding shows that multi purpose play areas can be an alternative in small playground environment.

• 한국콘텐츠학회논문지
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• 제7권8호
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• pp.152-162
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• 2007

본 연구는 애니메이션 스튜디오 비욘드 프로시니움이 제작, 발표한 단편애니메이션 에서 사용된 공간 디자인을 연구의 대상으로 하고 있다. 애니메이션을 위한 공간 디자인은 작품 속에서 연기자(캐릭터)가 연기를 통해 작품의 이야기를 전달하기 위한 장(Playground)이라는 기본적인 기능이 있고 나아가 작품의 시간적, 공간적 배경을 설명하거나 작품속의 은유나 상징체계를 시각적으로 표현해주는 장치적인 기능이 있다. 이 같은 기능을 충족시키는 디자인 결과를 얻기 위해 본론에서는 개념적 측면으로 시나리오의 은유와 상징적 의미체계를 공간 디자인에 적용하는 경우를 분석하였다. 제작적인 측면으로는 캐릭터와 소품, 카메라를 통해 잡힌 화면 구성과 이 같은 요소들의 움직임에 따른 동선을 복합적으로 고려하는 방법에 대하여 살펴보았다. 애니메이션제작을 위한 공간디자이너는 깊이 있고 복합적인 사고를 할 수 있어야 하며 이를 실질적으로 구현 할 수 있는 기술적인 소양이 필요하다.

• 한국임상수의학회지
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• 제16권2호
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• pp.439-442
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• 1999

An animal health monitoring system in Gyeongnam area (near-Chinju) was studied to evaluate the environmental risk factors, physical examinations and 4 disease entities(abomasal displacement, traumatic reticulopericarditis ＆ -peritonitis, milk fever and lameness) in 40(34 in second year)dairy herds (total 1253 dairy cattle). In feeding environments, we examined housing system, forage percentage in ration, stall types, playground, cleanness of stall. In housing system, most of herds (60%) have tie-stall types and 36 herds are open-type housing. The forage ratio of ration was less than 50% in most of herds (67%). 39 herds had their own playgrounds and the frequency of playground cleanness was irregular, Physical examinations included the T(temperature), P (pulse), R (respiration), abnormalities of superficial lymph nodes, claw examination and total CBC with blood from tail veins. T, P, R are within normal limits (T : 38.1$\pm$0.6$^{\circ}C$, P : 84.6$\pm$12.9/min., R : 24.0$\pm$7.6/min. ,respectively), the swelling of lymph nodes were shown in 13 cattle and overall claw trimming was required in 3 herds. In blood examination, 23 cattle showed leuko-cytosis and 7 cattle showed low RBC and hemoglobin level, the other cattle were within normal limits (WBC : 8.90$\pm$2.06 10$^3$/ul., RBC : 6.36$\pm$1.02 10$^{6}$ ul, Hb : 9.83$\pm$ 1.20 g/dl PCV : 27.43$\pm$5.67 %, respectively). In 4 disease entities, we found some metallic foreign bodies in men of 13 cattle, which had predisposing factors of traumatic reticulopericarditis and reticuloperitonitis, 13 abomasal displacement, 51 milk fever and lameness in 39 cattle.

• 한국학교ㆍ지역보건교육학회지
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• 제13권2호
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• pp.107-118
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• 2012

Backgrounds: In order to prevent dental injuries that often occur in child and adolescent, it is intended to investigate and assess actual state of the injury development, present epidemiological background, and consider and discuss for preparing preventive means against the injury development. Purpose: It was attempted to understand major features of dental injuries developing in child and adolescent and indentify high risk factors of dental injuries in child and adolescent. Methods: In this study, 523 cases of computerized data collected as disease entities of dental injuries among 1-18 years old patient visiting S university hospital located in Seoul in 2009 were analyzed and following results were obtained. Results: It was found that the ratio of dental injuries by genders in child and adolescent was 66.14% of male and 33.86% of female. It was shown also that causes of dental injuries by ages were more in order of falling, bumping, chewing, traffic accident, sports, violence, and crash. In addition places where dental injuries occur by ages were home in less than 5 year old group, park, playground, and play yard in 6-11 year old group, park, playground, and play yard also in 12-14 year old group, and stairs, road, and outdoor places such as mountain climbing, beach, and camping in 15-18 year old group. It was found that time rages when dental injuries in child and adolescent often develop were 15-19 o'clock for falling, 15-19 o'clock for crash, 15-19 o'clock for bumping, 19-03 o'clock for violence, 15-19 o'clock for traffic accident, 15-19 o'clock for sports activity, and 15-19 o'clock for chewing. Conclusion: Background of dental injury inducing factors are very complicated and diversified, so deep study and analysis are required for its prediction. Therefore, it seems necessary to identify risk factors by phases such as before, at, and after accident, establish strategies to reduce injury development, and develop and utilize necessary programs.

• 한국조경학회지
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• 제33권6호
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• pp.78-89
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• 2006

This study was conducted to analyze the planting structure and ecological characteristics of greon spaces on the grounds of e Dangjin steam power plant. To achieve these goals, we surveyed existing vegetation, plant community structure, Plant volume and growth rate. Based on e vegetation analysis, existing vegetation was classified into six types: herbaceous species $(70.54\%)$, evergreen coniferous trees $(21.17\%)$, deciduous broad-leaved trees $(5.10\%)$, deciduous coniferous trees $(1.47\%)$, shrubs $(0.12\%)$, and other types $(1.59\%)$. The coal storage, office, and playground areas were community is the natural forest area where a Pinus thunbergii / Pinus densiflora community is distributed in terms of vegetation structure, species diversity, plant volume, and growth rate. The artificial green spaces(near the coal storage, office, playground areas) had a single-layer structure. Species diversity indices of the artificial green areas were $0.1655\~0.4807$ compared to 0.8628 in the natural forest, which presented a good growth environment. Also, the plant volume in the artificial green space was lower than that of the natural green space. Therefore, it would be desirable to develope a multi-layer structure similar to that of the vegetation in the natural green space in order to improve the amount of plant volume. The plant-damage ratio of Pinus thunbergii was $52.48\%$ in the coal storage area, and $8.48\~ 11.52\%$, in the other survey areas. Also, the vitality of Pinus thunbergii was $15.45k{\Omega}$ in the coal storage areas, which indicates bad growing conditions. This suggests that soil characteristics and dust have a bad impact on growth. The investigation into deciduous tres' growth status showed that appropriate plants would be Albizzia julibrissin, Acer palmatum var. sanguineum, Acer palmatum, Malus spp., Prunus sargentii.

• 한국환경복원기술학회지
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• 제15권4호
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• pp.97-109
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• 2012

In this study this writer carried out survey and analysis on paving materials of children's playground for 40 apartment buildings with each of such apartment containing 100 households or more and which were built within last 15 years in Jeonju. As a result of analysis of such questionnaires this author could draw following conclusion. In the second half of 1990s pavement materials which were used mainly were sand and during first half of 2000s they were mixture of sand and rubber block and around 2010 they were rubber block or rubber chip pavements. Such change seemed to be a result of consideration of convenience for management and safety rather than in deference to diversity of children's outing places. Survey on the current status of pavement materials revealed need for directives by the main entity for management and their firm resolve for its implementation. And there was need for their coping with problems such as pressure of treading or lack of it or poor condition of drainage in case of sand and phenomena of pitting or dipping down, discoloring and poor drainage in case of rubber chips and rubber blocks and loosening of gaps between rubber blocks etc. Result of analysing status of usage disclosed that 50.4% of the respondents to questionnaires stated that they had experience of accidents. With regard to cause of such accident it was found that 47.5% of accidents were attributable to play facilities and 19.5% were due to paving (floor) materials thus it was disclosed that not only play facilities but also pavement materials had impact on safety for the children. Result of analysing level of satisfaction with pavement materials showed that pavement by rubber chips and blocks had higher level of satisfaction which was reflection of fear on cleanness of sand. In terms of preference rubber chip and rubber block pavements were highest and the next one was sand. Reason for such preference was based on concern with safety.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2010년도 정기 학술발표대회
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• pp.54.2-54.2
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• 2010

본 연구는 침투시설의 설치위치와 종류에 따른 유출저감효과를 WinSLAMM 모형을 이용하여 분석한 것이다. 본 연구의 대상유역은 Driveway 38%, Residential Area 8%, Parking Storage 8%, Sidewalk 8%, Playground 8%, 투수유역(Landscaped Area) 30%와 같이 토지이용별로 구획된 총면적 $0.25km^2$의 전형적으로 도시화된 가상유역으로 설정하였다. 침투시설 설치에서 중요한 요소 중 하나인 시설의 포화를 고려하기 위하여 10mm/hr~30mm/hr범위의 강우를 적용하였으며, 설치위치와 종류별 침투시설의 정량적인 유출저감효과를 비교하기 위하여 Residential Area, Parking Storage, Playground와 같은 유역내 불투수유역과 유출구에 해당하는 Outfall에 일정한 규모의 침투트렌치와 침투통을 설치하였다. 침투시설은 강우의 크기에 따라 시설의 포화가 진행되며 일정 규모 이상의 강우 발생시 침투기능을 상실하므로 강우의 크기에 맞는 포화시점을 찾아 적절한 규모로 설치해야하고, 경호우에서 유역내의 침투시설의 가용면적을 증가시키면 유출저감효과도 증가하였으나, 강우가 커질수록 상대적으로 가용면적이 큰 유출구와 차이가 없거나 오히려 더 낮은 유출저감효과가 나타나기도 하였다. 또한 설치위치에 침투시설을 비교한 결과, 경호우의 경우 동일한 유출저감효과가 나타났으나, 침투트렌치가 포화에 이루어지기 전까지는 유출저감효과가 더 높았으며, 유출구에서는 침투트렌치가 침투통보다 더 높은 유출저감효과가 나타났다. 침투시설의 병행설치시 경호우에서는 병행설치의 효과가 없었으나 강우강도가 증가할수록 효과가 뚜렷하게 나타났고, 유역내 침투시설의 병행설치시 가용면적을 증가시킬수록 유출저감효과도 증가하여 경호우 이상의 강우에서 병행설치를 고려되어야한다는 결론을 얻었다.

• 한국주거학회:학술대회논문집
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• 한국주거학회 2006년도 추계학술발표대회 논문집
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• pp.103-108
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• 2006

Family day care centers, in apartment complexes, which are popular in korea, have merits as day care centers for young children due to their homey environments, closeness to children's homes, and available outdoor playground utilizing open space in the complexes. Thus, It is great potential to develop design guideline of family day care in apartment which are in demand now, The purpose of this study is to provide basic information for develop of design guideline family day care center. Therefore, this study aimed to investigate important the point of issues that influence the development of design family day care center. The study of the point of issues are environment behavior, Murtha & Lee' User Benefit Criteria, and Pattern theory. As a result, this study provide basic data of develop design guideline of family day care and important data of next study.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권2호
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• pp.524-539
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• 2014

To investigate schemes of secret key generation from Ultra-wideband (UWB) channel, we study a statistical characterization of UWB outdoor channel for a campus playground scenario based on extensive measurements. Moreover, an efficient secret key generation mechanism exploiting multipath relative delay is developed, and verification of this algorithm is conducted in UWB Line-of-sight (LOS) outdoor channels. For the first time, we compare key-mismatch probability of UWB indoor and outdoor environments. Simulation results demonstrate that the number of multipath proportionally affects key generation rate and key-mismatch probability. In comparison to the conventional method using received signal strength (RSS) as a common random source, our mechanism achieves better performance in terms of common secret bit generation. Simultaneously, security analysis indicates that the proposed scheme can still guarantee security even in the sparse outdoor physical environment free of many reflectors.