• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1997년도 하계학술대회 논문집 C
• /
• pp.1210-1212
• /
• 1997

This study describes the influence of the size of the median particles of alumina trihydrated(ATH) filler on the tracking resistance, tensile properties, dielectric properties and water immersion properties of EPDM rubber. A fixed 100pph concentration of the filler of A TH was used for all particle sizes from 0.7 to $20{\mu}m$. It is shown that tracking and erosion resistance decrease with increasing particle size, whereas tensile properties and dielectric properties are improved with increasing particle size of ATH.

• 가정과삶의질연구
• /
• 제17권3호
• /
• pp.159-170
• /
• 1999

This study analyzes the relationships between social networks and loneliness. Subjects of this study are male and female undergraduate students residing in Soul and Jeonju city Questionaires were and the obtained results were analyzed through SPSS PC+ The results are as follows 1) The size of general social networks doesnt's show difference between male and female students but at the of intimate social networks female students' one is bigger than male students' And female students' contact frequency via telephone is higher than male students' but the direct contact frequency did not show the difference: 2) The bigger the size of social networks is and the higher the contack frequency is the more the mount of social supports female students get. And the bigger the size of social networks is the more the amount of social support male students get. But among male students there are no relationships between the contact frequency and the amount of social supports 3) The size and co tact frequency of social networks is negatively related to loneliness among female and male students 4) The amount of social supports explaines the degree of loneliness at 23% among female students and 18% among male students.

• 국제학술발표논문집
• /
• The 6th International Conference on Construction Engineering and Project Management
• /
• pp.349-352
• /
• 2015

Size of building has a direct relationship with building cost, energy use and space maintenance cost. Therefore, minimizing building size during a project development is of paramount importance against such wastes. However, incautious reduction of building size may result in crowded space, and therefore harms the functionality despite the fact that building is supposed to satisfactorily support users' activity. A well-balanced design solution is, therefore, needed at an optimum level that minimizes building size in tandem with providing sufficient space to maintain functionality. For such design, architects and engineers need to be informed accurate and reliable space-use information. We present in this paper a conceptual framework of an agent-based space-use prediction simulation system that provides individual level space-use information over time in a building in consideration of project specific user information and activity schedules, space preference, ad beavioural rules. The information will accordingly assist architects and engineers to optimize space of the building as appropriate.

• 한국패류학회지
• /
• 제15권2호
• /
• pp.71-79
• /
• 1999

To develop new products for aquaculture, which fishermen at South Sea can get high income, after bay scallop was transplanted from Sandong province in China from October 17, 1996 to March 18, 1997 at Duekrang Bay in Janghung gun and Kamak Bay in Y대녀 City on Chollanam province, Sumjin river estuary in Hadong gun and Gejae Bay in Keoje city on Kyongsangnam proince. Temperature was decreased from 20.5$^{\circ}C$ to 5.1$^{\circ}C$ in February and then it was increased to 12.0 in March. Ranges of salinity, DO and Chlorophyll-a were 22.40-34.70 psu, 5.24-9.77 mg/l and 1.27-22.28 $\mu\textrm{g}$/l, respectively, and low temperature, sudden changes of salinity and low concentration of chlorophyll-a influenced the growth of bay scallop. bay scallop in the rearing period showed the fastest growth from October 17 to November 18 through the every size rages, while it grew slowly or stopped growing from December 18 to March 18. Among 4 transplanted areas, young scallop at Duekrang Bay showed the fastest growth and then Kamak Bay, Gejae Bay, Sumjin estuary in order. The daily growth rate of young scallop in the middle size range (5.70%) was higher than those in large (2.07%) and small (5.49%) size range. The meat weight index showed the highest in December. Survival rates from October to December were high, not related to the size ranges, but survival rate of the small young scallop from January to March was higher than Those of the rest. As the Result, transplanted bay scallop at South Sea was shown to grow by the middle of December (around 1$0^{\circ}C$ temperature).

• 한국지반공학회논문집
• /
• 제33권9호
• /
• pp.23-34
• /
• 2017

도심지 지하공간 개발을 위해서는 안정성 확보를 위해 암반 또는 암주의 미세균열까지도 보강해야 한다. 본 논문에서는 그라우팅 재료의 점도 및 입경, 주입압력, 균열 폭 등을 고려한 미세균열 그라우팅의 주입성능에 대한 연구를 수행하였다. 미세균열 보강에 사용되는 대표적인 그라우팅 재료는 용액형인 약액형 그라우팅 재료와 현탁액형인 시멘트계 그라우팅 재료가 있다. 약액형 그라우팅 재료와 시멘트계 그라우팅 재료의 주입성능은 공통적으로 점도에 영향을 받으며, 시멘트계 그라우팅 재료의 주입성능은 추가적으로 주입 재료의 입경에 영향을 받는다. 실내실험을 통해 점도를 역계산하여 재료별로 적합한 점도 측정 방법을 제시하였고, 균열 폭과 재료의 입경 간의 관계를 이용한 groutability ratio로 시멘트계 그라우팅 재료의 그라우팅 가능여부를 평가하였다.

• 디지털융복합연구
• /
• 제11권8호
• /
• pp.41-52
• /
• 2013

도시형생활주택은 1~2인 가구의 주거 안정을 목적으로 규정을 완화한 새로운 주거형태의 주택이다. 본 연구에서는 도시형생활주택의 거주 후 평가(POE;Post Occupancy Evaluation)를 비교 실시하고 결과를 토대로 정책적 시사점을 검토하였다. 연구대상지역은 서울의 강남, 강북의 4곳을 선정하여 총 200명을 대상으로 설문조사를 실시하였다. POE분석 결과, 교통문제, 주차공간, 경제성이 문제점으로 나타났다. 강남지역과 강북지역의 차이점은 독립표본 t-test 분석 결과 입지특성, 건물상태, 시공상태, 주택규모, 유지관리, 경제성에서 강남지역이 만족도가 높은 것으로 나타났으며, 지역간 차이는 크지 않게 나타났다. 따라서 도시형생활주택은 지역적 차이는 별반 없으며 도시형생활주택 전체적으로는 공급면적의 상향조정, 주차공간의 확보를 위한 강제조항의 도입, 설계기술의 개선이 실시되어야 한다.

• 디지털융복합연구
• /
• 제13권8호
• /
• pp.9-20
• /
• 2015

본 논의는 단락분석법을 차용하여 한국의 빌린도시 현상의 유물화로서 그 점검사항의 추출을 목적으로 두 도시지하철출입문면을 융복합적으로 해석하였다. 본 논의의 주제와 근접하다고 사료되는 논의들을 정리 요약하였다. 또한 '신뢰', '생활세계', '과잉커뮤니케이션'이론을 기반으로 빌린도시 현상의 재정의를 시도하였다. 그 정의에 입각하여 가장 대표적인 서울 런던지하철 차량의 내부 출입문면에 조성된 옥외광고의 시각 물리적 비중을 해석하였다. 해석결과 서울지하철의 경우는 공공정보(노선도, 대피요령, 수화기 위치, 비상시출입문, 등)와 상업정보(옥외광고)의 경계가 매우 모호했으며, 그런 만큼 빌린도시 현상이 매우 일반적인 사회로 해석되었다. 그러나 런던지하철의 경우는 한국지하철과는 매우 다른 양상으로 해석되었다. 결국 본 논의는 두 도시지하철 차량의 출입문을 통하여 높이, 크기, 색채, 간격, 여백, 그리고 영구성이라는 한국의 빌린도시 현상의 점검사항을 추출하게 했으며, 난립된 한국의 옥외광고를 제한해야 하는 제안기여도를 갖는다.

• 한국정보통신설비학회:학술대회논문집
• /
• 한국정보통신설비학회 2007년도 학술대회
• /
• pp.181-184
• /
• 2007

Up to now, a lot of houses, roads and other urban facilities have been damaged by natural disasters such as flash floods and landslides. It is reported that the size and frequency of disasters are growing greatly due to global warming. In order to mitigate such disaster, flood forecasting and alerting systems have been developed for the Han river, Geum river, Nak-dong river and Young-san river. These systems, however, do not help small municipal departments cope with the threat of flood. In this study, a real-time urban flood forecasting service (U-FFS) is developed for ubiquitous computing city which includes small river basins. A test bed is deployed at Tan-cheon in Gyeonggido to verify U-FFS. Wireless sensors such as rainfall gauge and water lever gauge are installed to develop hydrologic forecasting model and CCTV camera systems are also incorporated to capture high definition images of river basins. U-FFS is based on the ANFIS (Adaptive Neuro-Fuzzy Inference System) that is data-driven model and is characterized by its accuracy and adaptability. It is found that U-FFS can forecast the water level of outlet of river basin and provide real-time data through internet during heavy rain. It is revealed that U-FFS can predict the water level of 30 minutes and 1 hour later very accurately. Unlike other hydrologic forecasting model, this newly developed U-FFS has advantages such as its applicability and feasibility. Furthermore, it is expected that U-FFS presented in this study can be applied to ubiquitous computing city (U-City) and/or other cities which have suffered from flood damage for a long time.

• Asian Journal of Atmospheric Environment
• /
• 제3권1호
• /
• pp.52-58
• /
• 2009

Airborne particulates were collected in three different size fractions (>7 ${\mu}m$; 2.1-7 ${\mu}m$; < 2.1 ${\mu}m$) by using Andersen low-volume air samplers at three sites in Tieling city, Liaoning Province, a typical local city in northeast China, in every season during the period from July 2003 to May 2004. Nine polycyclic aromatic hydrocarbons (PAHs) and seven nitropolycyclic aromatic hydrocarbons (NPAHs) in the airborne particulates were determined by HPLC with fluorescence and chemiluminescence detection, respectively. The mean total concentrations of the nine PAHs and seven NPAHs were highest at The mixed residential and light industrial site, and lowest at the residential site near the suburbs. At all sites, more than 70% of the total PAHs and more than 60% of the total NPAHs were found in the finest particulate (< 2.1 ${\mu}m$) fraction. Both cluster analysis and several diagnostic ratios showed that the major contributors of PAHs and NPAHs in airborne particulates were coal combustion systems such as domestic stoves and coal boilers in all seasons in Tieling city.

• 건축역사연구
• /
• 제9권1호
• /
• pp.27-46
• /
• 2000

This study aims at examining the background and development process of Masan city after Koryo Dynasty, making a reconstructive map of Original Masan using the first registration maps made in 1912 and analyzing the urban structure of the Original Masan area. The origin of Masan city went back to Koryo dynasty. Around 1040 Koryo government placed an official shipping facility in Masan to transport the taxed grain to the capital city. After that Masan became an important port covering the southern part of KyungSang-Do. And the urbanization of the Original Masan began to bud after a shipping facility was again established by the Chosun Dynasty in 1760 and strengthened in the 19th century after the social standing system was broken and many peasants moved to cities as daily workers. In 1899 Masan was forced to be opened to foreign powers and they placed an international settlement distanced from the area(Original Masan). After this many Japanese advanced to the international settlement and further to the area. The advancement of Japanese brought a critical change in the urban structure of the area. Land was owned by Japanese and many modern sysytems were introduced such as modern buildings, new roads, railroad and modern factories. According to the reconstructive map of the area, 80.5% of land lots are less than $200m^2$ showing the size of each land lot is comparatively small. And Japanese occupied 31.5% of the land in the area. Their land was located on the stratigic points near the port and the center of commerce. The ratio of the road area to the whole land was around 14%, not so low for urban areas in that time. The reconstructive map reveals the exact coastline of the year 1912 erased now due to filling the sea and extending the land, Present Masan city has been developed having the Original Masan as its nucleus. The area has been always the center of urban activities for Masan city. Making an exact reconstructive map for the area and analyzing the urban structure of the area in 1912 is a very important work to understand Masan city wholy.