• Journal of IKEEE
• /
• v.23 no.4
• /
• pp.1448-1456
• /
• 2019

In this study, when applying LED light sources within a single-span glass greenhouse for growing crops, the illumination simulation was performed on the ceiling and side of the glass greenhouse to determine the selective placement and effective light transmission of Si series solar cells and dye-sensitive solar cells (DSSC) for supplying LED power source. In addition, energy saving effects of glass greenhouses were analyzed for optimum lighting control when both daylight and LED light sources are considered in glass greenhouses.

• Journal of the Korean Society of Safety
• /
• v.21 no.3 s.75
• /
• pp.73-80
• /
• 2006

Generally beam design depends on the yielding and maximum strength of each member varying with its section shape. Web plate of H-shape beam has not been substituted with glass plate, because it is known that its strength and heat properties are different and it is limited to substitute the existing steel web with glass element. Ceiling height of each room should be decreased with more than 60-80cm due to the beam. Differently from this condition, glass web beam has a good point to see through it and sunshine can be penetrate into the other size especially when it is installed as of outside wall. And also, it can be safer due to controlling room inside easier, if the strength is applicate. This study is to show some applicability after finding out the properties using the test. The test members with a size of $1,600{\times}200{\times}300{\times}9mm$ being SS41 rolled steel having THK 9mm flange while having 8,10mm and reinforced glass 12mm thickness is bonded with epoxy bond under the condition of temperature $28^{\circ}C$, humidity 50%, bonding power 24Mpa. It is show reinforced glass has 5 times of fracture stress more than the common glass but $50{\sim}150%$ difference between these 2 kinds of glass was shown. Reinforce glass did not support the original upper flange after fracture but the common glass did the upper flange after unloading. Generally reinforced glass is stronger than the common one but the common glass having a part of crack on it, compared with reinforced glass having the overall fracture could be more useful in case of needing ductility.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2003.11a
• /
• pp.923-927
• /
• 2003

The aim of this study is to investigate the characteristics and quantity of the noise reduction by pipe material, wrapped pipe with glass wool and installed pipe height The characteristics of noise emission from drain-pipes is as follows. The noise reduction pipe in PVC can reduce noise levels in 7-10㏈ and the cast-iron pipe can reduce in 14㏈compared with the normal PVC pipe. In these days, the glass wool was used for preventing the burst and the noise reduction. But the glass wool for wrapping pipe is not effective to the noise reduction. The characteristics of noise emission from various installed pipe height were measured As the ceiling space of the remodeled building was raised, the noise level was troubled by increasing of the vertical pipe length.

• Journal of Korea Game Society
• /
• v.17 no.6
• /
• pp.173-188
• /
• 2017

This study explores the gender status of $Pok{\acute{e}}mon$ Series by analyzing the aspects of male/male-dominated $Pok{\acute{e}}mons$ and female/female-dominated $Pok{\acute{e}}mons$. Counting from the First Generation to the Seventh Generation $Pok{\acute{e}}mon$, there are 802 characters. Each $Pok{\acute{e}}mon$ has different gender ratio; the one $Pok{\acute{e}}mon$ could have more "possibility" to become male, female, equal, or genderless when he/she is born. This study examines those $Pok{\acute{e}}mons$ in three criteria: 1) Frequency 2) Stats 3) Diversification of Type, and it compares them based on their gender. $Pok{\acute{e}}mon$ Series is different than other video games as it provides many characters ($Pok{\acute{e}}mons$). Thus, it helps the audience to view the gender status of video game characters more closely and meaningfully.

• Proceedings of the SAREK Conference
• /
• 2009.06a
• /
• pp.1507-1512
• /
• 2009

Flow field in a roller conveyor system, induced from the movement of a cassette in which glasses for flat panel display are loaded, is numerically studied in this paper. Contamination on the glass surface by dust particles produced from mechanical friction between roller and cassette is predicted from the analysis results of flow fields. Results show that a large swirl flow is formed under the moving cassette with constant speed. This swirl flow is confined only under the cassette because two main streams from the backward and the fan filter unit on the top ceiling are sufficiently strong. Therefore, it can be said that possibility of the contamination by the particles originated from the friction is relatively low. It is also revealed that flow direction between glass plates is changed according to the speed of the cassette movement due to the shear force of glass plates.

• Journal of Korean Society of Occupational and Environmental Hygiene
• /
• v.5 no.2
• /
• pp.137-146
• /
• 1995

Twenty(20) large commercial buildings located in Seoul with friable sprayed-on surface insulation material on ceilings were investigated for asbestos content in bulk material by polarized light microscopy and for airborne fiber concentrations in buildings by phase contrast microscopy. In addition, such building-related variables as building age, numbers of traffic, airflow, surface conditions of the ceiling, temperature, and humidity were studied for any correlation with airborne fiber concentrations. The results were as follows: 1. Chrysotile asbestos was found in two bulk samples with 3-5% content and with <1%in one sample out of total 20 bulk samples collected. Glass fiber and mineral wool were the two major constituents of the bulk samples. 2. The ceiling surfaces were very friable in 16 buildings and were relatively hard in 4 buildings. The friability of the surface material was dependent upon the type and the amount of binder that had been mixed with the sprayed-on surface material. 3. Airborne fiber concentrations were log-normally distributed and the geometric mean(geometric standard deviation) fiber concentrations in the underground parking lots, inside buildings, and outdoor ambient air were 0.0063(1.97)f/cc, 0.0068(2.29)f/cc, and 0.0033(2.36)f/cc, respectively. 4. No significant relationship of airborne fiber concentrations and all building-related variables studied except humidity was found. The results of this study suggest that the sprayed-on surface insulation material found in some commercial buildings may possibly be contaminated with asbestos. Since most of the ceiling surfaces surveyed were very friable and poorly maintained and the airborne fiber concentrations were relatively high, there is a possibility of asbestos fiber contamination in these buildings, particularly at those buildings with asbestos-contaminated surface material. Since poorly maintained surface conditions were thought to be a source of high airborne fiber concentrations, there is a urgent need of a systematic operation and maintenance program. Further study of non-occupational asbestos exposure in general population utilizing advanced analytical technique such as transmission electron microscopy is highly recommended.

• Fire Science and Engineering
• /
• v.17 no.4
• /
• pp.124-130
• /
• 2003

This research focuses on analysis of a interaction fracture of various glasses due to contact of water sprayed curtain on hot glass surface with high temperature produced from convective heat source near glass wall. A large scaled experimental test was done in order to find the range of the glass surface temperature to be able to cause the breakage of the glasses when water droplets reach on the hot surface. This paper shows the allowable temperature of the glass surface for prevention of the cooling down breakage before water curtain droplets contact the surface. Allowable Temperature if $250^{\circ}C$ for the tempered glass but general glass is very relatively low. Therefore if the water curtain spray system was adequately activated by a thermal detector installed below ceiling adjacent glass wall with water curtain nozzle system, all hot glass would not break out by cooling water droplet's contact on the hot surface due to convective heat released by adjacent fire source near the glass wall.

• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.66 no.4
• /
• pp.242-246
• /
• 2017

In this study, it was investigated about optical simulation in high brightness and high uniformity general lighting using glass light guide plate. And we adopt edge-light emission type light plate. Edge-light type lighting has been used LCD application, especially note PC or smart phone backlight unit. Because it had the good properties such as slim shape and light weight. We thought this type was suitable for general lighting application such as wall attached type or ceiling mount type. But many of edge-light type lighting had problems. It called slanted output light rays. That was main key parameter how could control the direction of output light rays. We investigated the solution of this problems, using ray tracing method, we recognized the major fact of the solution relied on the geometric structure of diffusing dot shape. We set the conditions of aspect ratio in diffusing dot shape such as 0.5 to 1. And, at first, we designed diffusing dots shape based on the results of optical simulation and made specimen. as above condition, and acquired good result in confirming dots shape such as the value of the output rays's peak angle was around 75 degrees. And good light distribution characteristics were measured by slated spectro-radiometer. It was shown that the effective ways of designing light distribution characteristics using optical simulation such as ray tracing linear method for making general lighting using glass light guide plate.

• Venture DIGEST
• /
• s.23
• /
• pp.4-5
• /
• 2003

사회활동을 왕성히 펼치는 여성들이 흔히 쓰는 말 중에‘유리천장(glass ceiling)’이라는 말이 있다. 위를 쳐다보면 한 없이 올라갈 수 있을 것같지만 막상 그 곳에 다다르면 보이지 않는 장벽이 머리를 누른다는 뜻이다. 법이나 규정상으로는 평등이 이루어진 것처럼 보이나‘실제상황’은 그렇지 않음을 의미하는 자조적인 말이다. 특히 국내에서 회사를 경영하는 여성CEO라면 누구나‘유리천장’의 도를 넘어‘콘크리트 천장’, 혹은 이보다 더한‘강철천장’을 실감하게 된다. 그러나 이런 사회적인 편견과 제도적인 불평등 속에서도 자신만의 확고한 입지와 영역을 구축하며 벤처를 이끄는 당당한 여성CEO가 점점 늘고 있다. 서버판매 및 서버호스팅, VPN 등 사업으로 성장일로를 걷고 있는 e-Business 전문업체인 씨앤에스 김태희(46) 대표가 그 대표적인 우먼파워에 속한다. 김 대표는 지난해‘제6회 여성경제인의 날’을 맞아 모범여성기업으로 선정되어‘대통령 표창’을 수상하는 등 여성기업분야 우수중소기업으로 탄탄한 기술력과 탁월한 경영능력을 인정받고 있다. 뿐만 아니라 그는 IT업계의 성공 키워드인 기술과 경영, 마케팅의 삼박자를 고루 갖춘 전문 경영인으로도 유명하다.

• Special Issue of the Society of Naval Architects of Korea
• /
• 2008.09a
• /
• pp.112-117
• /
• 2008

The Insulation, which is consist of the glass wool, mineral wool or perforated SUS plate, installed on the wall or under ceiling for the protecting heat and the blocking the noise of engine room area. In our shipyard, designing the structure model of insulation is hard and difficult, Because designed the insulation model is considered of any factors which are hull model properties of panel shape, direction and thickness and service of area. In this paper, We issue the way to utilize shape and direction of the hull model information and specific character of working space in engine room.