• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2023년도 추계학술발표대회
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• pp.335-336
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• 2023

본 연구에서는 서울시에서 시범 운영을 진행 중인 스마트쉘터를 우선으로 설치해야 하는 지역을 제안한다. 행정동별 유동 인구뿐만 아니라 교통약자, 폭염, 대기오염을 고려한 클러스터링을 통해 우선순위를 부여한 서울시 스마트쉘터 설치 지역을 제안하였고, 이를 통해 스마트쉘터를 효율적으로 설치할 수 있을 것으로 기대한다.

• 디지털산업정보학회논문지
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• 제20권1호
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• pp.109-118
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• 2024

Recently, a social issue has arisen involving RDDoS attacks following the sending of threatening emails to security administrators of companies and institutions. According to a report published by the Korea Internet & Security Agency and the Ministry of Science and ICT, survey results indicate that DDoS attacks are increasing. However, the top response in the survey highlighted the difficulty in countering DDoS attacks due to issues related to security personnel and costs. In responding to DDoS attacks, administrators typically detect anomalies through traffic monitoring, utilizing security equipment and programs to identify and block attacks. They also respond by employing DDoS mitigation solutions offered by external security firms. However, a challenge arises from the initial failure in early response to DDoS attacks, leading to frequent use of detection and mitigation measures. This issue, compounded by increased costs, poses a problem in effectively countering DDoS attacks. In this paper, we propose a system that creates detection rules, periodically collects traffic using mail detection and IDS, notifies administrators when rules match, and Based on predefined threshold, we use IPS to block traffic or DDoS mitigation. In the absence of DDoS mitigation, the system sends urgent notifications to administrators and suggests that you apply for and use of a cyber shelter or DDoS mitigation. Based on this, the implementation showed that network traffic was reduced from 400 Mbps to 100 Mbps, enabling DDoS response. Additionally, due to the time and expense involved in modifying detection and blocking rules, it is anticipated that future research could address cost-saving through reduced usage of DDoS mitigation by utilizing artificial intelligence for rule creation and modification, or by generating rules in new ways.

• Asian-Australasian Journal of Animal Sciences
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• 제25권4호
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• pp.584-591
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• 2012

To evaluate the role of using forage, shade and shelterbelts in attracting birds into the range, three trials were undertaken with free range layers both on a research facility and on commercial farms. Each of the trials on the free range research facility in South Australia used a total of 120 laying hens (Hyline Brown). Birds were housed in an eco-shelter which had 6 internal pens of equal size with a free range area adjoining the shelter. The on-farm trials were undertaken on commercial free range layer farms in the Darling Downs in Southeast Queensland with bird numbers on farms ranging from 2,000-6,800 hens. The first research trial examined the role of shaded areas in the range; the second trial examined the role of forage and the third trial examined the influence of shelterbelts in the range. These treatments were compared to a free range area with no enrichment. Aggressive feather pecking was only observed on a few occasions in all of the trials due to the low bird numbers housed. Enriching the free range environment attracted more birds into the range. Shaded areas were used by 18% of the hens with a tendency (p = 0.07) for more hens to be in the paddock. When forage was provided in paddocks more control birds (55%) were observed in the range in morning than in the afternoon (30%) while for the forage treatments 45% of the birds were in the range both during the morning and afternoon. When shelterbelts were provided there was a significantly (p<0.05) higher % of birds in the range (43% vs. 24%) and greater numbers of birds were observed in areas further away from the poultry house. The results from the on-farm trials mirrored the research trials. Overall 3 times more hens used the shaded areas than the non shaded areas, with slightly more using the shade in the morning than in the afternoon. As the environmental temperature increased the number of birds using the outdoor shade also increased. Overall 17 times more hens used the shelterbelt areas than the control areas, with slightly more using the shelterbelts in the afternoon than in the morning. Approximately 17 times more birds used the forage areas compared to the control area in the corresponding range. There were 8 times more birds using a hay bale enriched area compared to the area with no hay bales. The use of forage sources (including hay bales) were the most successful method on-farm to attract birds into the range followed by shelterbelts and artificial shade. Free range egg farmers are encouraged to provide pasture, shaded areas and shelterbelts to attract birds into the free range.

• 한국조경학회지
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• 제31권5호
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• pp.58-72
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• 2003

Rooftop greenery has been used as a way to solve urban environmental problems by creating green space in densely populated cities. This study was carried out to suggest more effective designs for roof-garden at hospitals through a post-occupancy evaluation. The roofgarden of Asan Medical Center was evaluated with regards to setting, proximate environmental context, users, and design activity by a multi-method including plan investigations, observations, in-depth interviews and questionnaires. The results are summarized as follows; the users' main activities included resting, walking, and talking. A number of users were observed at shaded spaces sitting on such things as benches, pergolas, and shelters. The satisfaction of the users showed high satisfaction level except in the amount of shade, facilities, and shelter. The variables affecting a overall satisfaction were ‘accessibility’, ‘safety’, ‘quality of surroundings’, and ‘suitability for speculation’. By comparing the design concept with using pattern, designer's intention was not reflected sufficiently in several aspects such as ‘event deck for therapy programs’, ‘grove and path’, and ‘low planters’. This study suggests some design implications; it is necessary to furnish shaded sitting places for passive behaviors and pathways for walking or a light exercise. A wind-break wall with glass windows could widen the users' views in a limited space. Natural shade like tree shade or pergola are more desirable than artificial shades. As for the vertical location of the roofgarden, the middle floor could be better than top area for accessibility. Characteristics of building and users should be considered in detail to provide distinct spaces. Proper technical standards for the greening of artificial ground should be established.

• 한국수산과학회지
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• 제36권5호
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• pp.469-473
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• 2003

Transplantation of Sargassum horneri to natural substrate using the rope seeding method was undertaken. Seeding of S. horneri was grown on net in an indoor tank up to 0.2-0.3 cm in frond length for 2 months, and then transplanted to an architecture tile $(10\times10\;cm)$ with underwater glue and an iron pipe. After two months, number of S. horneri on the tile decreased because of grazing by herbivores. However, S. horneri on the iron pipe grew up to 0.5-2.0 cm in frond length. After 7 months, they rapidly grew up to a frond length of 11.0-203.0 cm with a mean frond length of 122.6 cm. S. horneri grew up to a maximum frond length of 313.0 cm, and mean frond length of 228.0 cm, after 10 months. The artificial S. hornevi beds can be used to clean the seawater and also be utilized as a source of marine biomass as well as for supplying habitat, shelter and spawning beds for fish and invertebrates.

• 한국환경과학회지
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• 제28권1호
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• pp.163-167
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• 2019

In order to collect base line data for setting up bat boxes, we established a total of 30 bat boxes in 2017. The bat boxes were established on the sidewalls of overpass and on the inside of girder bridges. Since establishing bat boxes, we regularly confirmed whether or not they were used; in June 2018, we confirmed that a total of six bat boxes were being used by Pipistrellus abramus and Myotis aurascens. It was confirmed that P. abramus used one bat box each out of five bat boxes, and that many adult females of M. aurascens used a single bat box as a place for maternity roosts. This result is the first use case for setting up bat boxes across the country, and could be used as baseline data to build roosts for bats by setting up additional bat boxes in the future.

• 대한환경공학회지
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• 제36권12호
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• pp.828-836
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• 2014

본 연구는 얕은 연못에 시공된 지하 매립형 어류 피난처 구조물인 artificial deep pool (ADP)을 대상으로 늦봄~여름기간 동안 수질환경을 평가하고 그 특징을 파악하고자 하였다. 개방수역인 St. 1과 ADP인 St. 2로 구분하여 분석한 결과, St. 2는 St. 1보다 평균적으로 수온 $1.4{\sim}3.2^{\circ}C$, DO 2.4~3.6 mg/L 낮았고 일수질변동(daily water quality fluctuation)이 적은 안정된 공간으로 나타났다. 특히 수온의 일변화(daily variations)는 St. 1에서 ${\geq}4^{\circ}C$을 보였으나, St. 2에서는 거의 변화가 없었기 때문에 고수온이 지속될 때 어류가 피난 공간으로 활용할 수 있음을 시사하였다. 이화학적 수질은 St. 1과 St. 2에서 큰 차이가 없었지만, 수온, pH, DO, 전기전도도에 대해서는 서로 뚜렷하게 다른 공간임을 나타내었다(two-way ANOVA, P<0.05). ADP 내부는 수심별로 thermal and DO gradient가 나타났으며, 수심 약 1.2 m 이후부터 급격히 감소하였다. 이러한 수질환경은 얕은 연못에서 어류의 서식 및 산란에 영향을 미치며, 본 연구의 조사지점의 연못에서는 각시붕어(Rhodeus uyekii)가 우점하는 것으로 보아, ADP가 적용되면서 납자루아과인 각시붕어의 적정 산란수온($16.5{\sim}18.5^{\circ}C$)을 제공하여 각시붕어가 서식하기 좋은 환경을 조성한 것으로 판단된다. 또한, ADP는 여름철에 수온이 높고, 변동이 큰 외부환경보다 낮은 수온을 일정하게 유지하여 수온변동 및 고온에 민감한 어종에게 좋은 피난처로 활용될 것으로 여겨진다.

• 한국습지학회지
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• 제7권4호
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• pp.81-88
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• 2005

2001년부터 2004년동안 4년간에 걸쳐 조사된 태화강하류의 겨울철새는 11목 21과 58종 최대 출현개체수는 14,034개체이다. 연도별로 출현 사항을 보면 종수의 경우 2001년 48종에서 2004년 31종으로 매년 줄어들고 있다. 한편 개체수의 경우 2002년에 11,991개체로 가장 많이 조사되었고 2004년이 3,476개체로 가장 적게 조사되었다. 5% 이상의 우점종은 흰죽지 Aythya ferina(6,946개체), 떼까마귀 Corvus frugilegus(1,643개체), 붉은부리갈매기 Larus ridibundus(1,193개체), 괭이갈매기 Larus crassirostris(805개체)로서 이들 4종의 개체수 합(10,587개체)이 전체 개체수의 75.4%를 차지한다. 태화강에 도래하는 조류를 보호하기 위해서는 강변 가까운 곳에 조류들의 먹이장소 조성, 쉼터 등 완충지대를 만들어주고 도로와 고수부지 사이는 수목대 또는 차광대와 방음벽을 설치할 필요가 있다. 무엇보다도 시민들의 철새에 대한 보호 의지가 강해야 한다. 또한 철새들이 많이 도래하는 태화강과 동천의 합수부 일대, 조류들의 번식지와 잠자리로 이용하는 대밭 지역($2{\times}0.1km^2$)의 서식지 보호 및 관리방안이 필요하다.

• Journal of Information Technology Applications and Management
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• 제26권3호
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• pp.121-134
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• 2019

The Fourth Industrial Revolution has differentiated technologies such as artificial intelligence, IoT(Internet of things), big data, and mobile. As the civilization develops more and more, humanity enjoy the cultural activities more than economic activity for the food and shelter. The platform structure based on the advanced information technology of the present will expand the cultural contents area in a variety of ways. Cultural contents respond sensitively to changes in consumer and will be useful experiences of human activities. Therefore, it should be noted again that the contents industry should not be limited to the discussion of the application of the fourth technology, but should be produced with emphasis on useful experiences of human being. In other words, the discussion of human activities around cultural contents should be focused on how to apply beyond the use of fourth industrial technology. Therefore, it is necessary to analyze the basis of the successful storytelling of the planning stage to connect the fourth industrial technology and human useful experience as a method for developing cultural contents, and to build and propose a model as a strategic method. This study analyzes domestic and foreign cases made by using big data among the visual contents which show continuous increase of consumption among culture industry field, and draws success factors and limit points. Next, we extract what is the successful matching factor that influenced consumer 's consciousness, and find out that the structure of culture prototype has been applied in the long history of mankind, and presents it as a storytelling model. Through the above research, this study aims to present a new interpretation and creative activity of cultural contents by presenting a storytelling model as a methodology for connecting creative knowledge, away from the general interpretation of social phenomenon applied with big data.

• 인간식물환경학회지
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• 제23권3호
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• pp.255-265
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• 2020

Background and objective: The purpose of this study was to provide guidelines for irrigation management by analyzing the effects of soil moisture on the growth characteristics of herbaceous plants in green infrastructure. Methods: In a rain shelter greenhouse, the growth performance of nine species of experimental plants was assessed under different soil moisture contents (20%, 15%, 10%, 5%, and 1%) for about 5 months to analyze plant growth characteristics due to soil humidity. Methods to determine plant growth conditions include surveying growth conditions of the crowns, stems, leaves, flowers and fruits on the aerial part and surveying growth conditions of the roots in the underground part. Results: The results showed that Mukdenia rossii and Astilbe rubra grew well at 15% moisture content with irrigation intervals of 10 and 13 days, respectively. Soil moisture content of 10% with irrigation intervals of 13 and 17 days was appropriate for Sedum kamtschaticum and Pachysandra terminalis. Similarly, Aquilegia japonica and Liriope platyphylla grew well at 15% moisture content with irrigation intervals of 10 and 17 days. However, Ligularia stenocephala grew well-developed stems and roots at 1% soil moisture content and an irrigation interval of 25 days, while the optimum conditions for Lythrum anceps were 5% moisture content and an irrigation interval of 8 days. Conclusion: Although a limited number of experimental plants were used in this study, this study could propose an appropriate irrigation cycle for planting on artificial soil substrates. Based on these results, it is possible to plan suitable planting designs considered irrigation cycles.