• 한국태양에너지학회:학술대회논문집
• /
• 한국태양에너지학회 2008년도 추계학술발표대회 논문집
• /
• pp.90-95
• /
• 2008

An SHGC(Solar Heat Gain Coefficient) is a determinant of total flux of solar radiation coming indoor and a critical factor in evaluating heating and cooling load. U-value represents heat loss while SHGC denominates heat gain. Recently, windows with high solar gain, mid solar gain or low solar gain are being produced with the development of Low-E coating technology. This study evaluated changes in energy consumption for heating and cooling according to changes in SHGC when using double-layered Low-E glass and triple layered Low-E glass in relation to double layered clear glass as base glass. An Office was chosen for the evaluation. For deriving optical properties of each window, WINDOW 5 by LBNL, an U.S. based company. and the results were analyzed to evaluate performance of heat and cooling energy on anannual basis using ESP-r, an energy interpretation program. Compared to the energy consumption of the double layered clear glass, the double layered Low-E glass with high solar gain consumed $69.5kWh/m^2,yr$, 9% more than the double layered clear glass in cooling energy. The one with mid solar gain consumed $63.1kWh/m^2,yr$, 1% less than the base glass while the one with low solar gain consumed $57.6kWh/m^2,yr$, 10% less than the base glass. When it comes to tripled layered glass, the ones with high solar showed 2% of increase respectively while the one with mid solar gain and low solar gain resulted 5% and 11% in decrease in energy consumption due to low acquisition of solar radiation. With respect to cooling energy. it was found that the lower the SHGC. the less energy consumption becomes.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
• /
• pp.282-285
• /
• 2007

Satellite observed brightness temperature simulation using a radiative transfer model (here after, RTM) is useful for various fields, for example sensor design and channel selection by using theoretically calculated radiance data, development of satellite data processing algorithm and algorithm parameter determination before launch. This study is focused on elaborating the simulation procedure, and analyzing of difference between observed and modelled clear sky brightness temperatures. For the CMDPS (COMS Meteorological Data Processing System) development, the simulated clear sky brightness temperatures are used to determine whether the corresponding pixels are cloud-contaminated in cloud mask algorithm as a reference data. Also it provides important information for calibrating satellite observed radiances. Meanwhile, simulated brightness temperatures of COMS channels plan to be used for assessing the CMDPS performance test. For these applications, the RTM requires fast calculation and high accuracy. The simulated clear sky brightness temperatures are compared with those of MTSAT-1R observation to assess the model performance and the quality of the observation. The results show that there is good agreement in the ocean mostly, while in the land disagreement is partially found due to surface characteristics such as land surface temperature, surface vegetation, terrain effect, and so on.

• 반도체디스플레이기술학회지
• /
• 제17권3호
• /
• pp.75-84
• /
• 2018

According to IHS, the overall display market is expected to grow at an average annual rate of 6% from $ 104 billion in 2016, to $ 138 billion in 2021. Among them, the OLED display panel will grow from $ 15 billion to $ 41 billion over the same period, forecasting a high annual growth rate of 22%. However, the refraction index, light leakage, bubble generation, adhesion deterioration, peeling phenomenon, moisture resistance, light transmittance, low turbidity. OCA (optically clear adhesive), which solves problems such as improving the resistance of the conductive film, is largely dependent on imported products. In addition, in 2016, the world market is worth KRW4.3 trillion, and the adhesive market has a large market effect. In this study, we tried to analyze the technical competitiveness of patent and thesis by classifying OCA (optically clear adhesive, optical adhesive) for display panel by curing method. As a result of the study, the amount of patents and papers in Korea was found to be superior to other competitors, but the quality level was low. In particular, it was found that the achievements of the papers in the hot melt field are lacking and the government should expand its support.

• International Journal of Oral Biology
• /
• 제44권3호
• /
• pp.77-80
• /
• 2019

Clear cell odontogenic carcinoma (CCOC), a very rare neoplasm located mostly in the mandible, has been regarded as a benign tumor. However, due to the accumulation of case reports, CCOC has been reclassified as a malignant entity by the World Health Organization. Patients with CCOC present with regional swelling and periodontal indications with variable pain, often remaining misdiagnosed for a long period. CCOC has slow growth but aggressive behavior, requiring radical resection. Histologic analysis revealed the monophasic, biphasic, and ameloblastic types of CCOC with clear cells and a mixed combination of polygonal and palisading cells. At the molecular level, CCOC shows the expression of cytokeratin and epithelial membrane antigen, along with markers that assign CCOC to the sarcoma family. At the genetic level, Ewing sarcoma breakpoint region 1-activating transcription factor 1 fusion is regarded as the key feature for identification. Nevertheless, the scarcity of cases and dependence on histological data delay the development of an efficient therapy. Regarding the high recurrence rate and the potential of distant metastasis, further characterization of CCOC is necessary for an early and accurate diagnosis.

• 한국융합학회논문지
• /
• 제8권12호
• /
• pp.425-430
• /
• 2017

본 연구는 토복령 추출물의 여드름 균에 대한 항균활성 및 방부효과를 측정하여 최근 논란이 되고 있는 합성방부제의 대체 가능한 천연 항균 추출물의 개발을 위해 연구하였다. 토복령은 국내산으로 건조한 후 증류수와 95% EeOH 두 가지 용매를 각각 사용하여 실온에서 추출하였다. 그 결과 2종 P ropionibacterium acnes 3314, Propionibacterium acnes 3320의 여드름 균에 대한 항균 효과가 매우 우수하였으며, 특히 증류수 추출물의 clear zone이 16.61 mm로 가장 높은 활성을 나타내었다. 또 피부오염 군집을 채취한 결과에서는 24.48 mm의 clear zone을 보여 토복령 추출물은 여드름균에 대한 항균 활성뿐 아니라 그 외 피부 상재균에 대한 항균 활성도 높음을 알 수 있었다. 이 상의 결과로 토복령 추출물은 항균효능 및 방부 효능을 갖는 화장품 원료로서의 가능을 확인할 수 있었고, 향후 천연 방부제 개발을 위한 기초 연구 자료가 될 것으로 사료된다.

• 한국작물학회지
• /
• 제27권2호
• /
• pp.169-174
• /
• 1982

일복내의 광환경과 포장상태에서의 물질생산 실태를 파악하기 위하여 5년근 개체군의 층별(상, 중, 하층), 재식립치별(1, 3, 5행)로 맑은 날 및 흐린날 각각 일복내외의 조도를 측정하고 대상조도를 구하였으며 포장에서의 광합성 호흡속도를 측정하였다. 1. 개체군 상부와 조도는 1행이 상대적으로 높고 3, 5행간에는 큰 차이가 없었으나, 중앙부의 경우는 1, 3, 5행간에 뚜렷한 차이를 보였다. 2. 쾌청일에 비해, 맑으나 산광이 많은 날은 일복내 조도가 높고 흐린날은 낮았으나 외부조도에 대한 비율은 양자 모두 쾌청일보다 높았다. 3. 광합성속도는 행별로 차이가 커서 후행일수록 낮았다. 그러나 전행에서도 광합성 최대능력을 나타내는 것으로는 생각되지 않았다.

• Journal of Forest and Environmental Science
• /
• 제18권1호
• /
• pp.45-52
• /
• 2001

본 논문은 솔잎혹파리 피해임지에서 수목의 외형적인자(수고, 수관폭, 흉고직경, 지하고)와 shigometer를 이용한 전기 저항치 ($k{\Omega}$)의 관계를 조사하였다. 외형적인자와 저항치간의 관계는 수고, 수관폭, 흉고직경은 높은 상관관계가 있었고, 지하고는 뚜렷한 관계가 나타나지 않았다. 수고, 수관폭, 흉고직경은 큰 수목이 전기저항치가 낮았고(수목의 활력이 높음) 작은 수목이 전기저항치가 높았다(수목의 활력이 낮음). 솔잎혹파리 피해임지의 고사목과 생존목을 비교하면 고사목이 생존목에 비하여 수관폭과 흉고직경의 크기는 작았고, 지하고는 높았다. 전기저항치를 3등급으로 구분 한 결과(< $14{\Omega}$, 생존가능성 양호, $14{\sim}20{\Omega}$, > $20k{\Omega}$고사 가능성 있음), 외형적인자의 크기는 낮은등급(< $14{\Omega}$)에서 수고, 수관폭, 흉고직경이 컸으며, 지하고는 낮았다. 조사한 외형적인자와 수세와의 관계를 직선회귀 방정식으로 산출한 결과 Y=-0.572${\times}$수고-1.163${\times}$수관폭-0.242${\times}$흉고직경+0.757${\times}$지하고+25.765이였으며 이들의 회귀식은 5%의 수준에서 유의성이 인정된다.

• 한국소성가공학회:학술대회논문집
• /
• 한국소성가공학회 2001년도 추계학술대회 논문집
• /
• pp.260-263
• /
• 2001

Mechanical properties have been accepted to be major factor to improve wear resistance. The effect of mechanical properties on wear resistance of 0.27C-0.70Ni-1.42Cr-0.20Mo steel was studied under various test conditions. It is clear that yield strength, tensile strength, impact value, and hardness are strongly related each other. Wear resistance tests as pin on plate type and dry sand / rubber wheel type proved to be that wear depends on mechanical properties. Microstructures were also observed to make clear the wear properties. At quenching and low temperature tempering, the specimen has a good wear resistance.

• 대한두개안면성형외과학회지
• /
• 제19권4호
• /
• pp.283-286
• /
• 2018

Malignant pilomatricoma (pilomatrical carcinoma) is a rare, locally occurring malignant tumor with a high rate of recurrence in the case of incomplete excision. This tumor has two characteristics. First, recurrences of pilomatrical carcinoma are common; second, distant metastasis is rare, but if it occurs, it is very fatal. It has characteristic features of high mitotic counts, cellular atypia, and local invasion. Although fine needle aspiration and excisional biopsy could help to confirm this tumor diagnosis, pathologic findings are critical. Pilomatricomas have some characteristic features in histological aspect, such as epithelial islands of basaloid cells and shadow cells or ghost cell. Also, various types of immunohistochemical staining are used to confirm the diagnosis. Despite the lack of clear surgical criteria, treatment is a wide local excision with histologically clear resection margins with or without adjuvant radiotherapy.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2021년도 가을 학술논문 발표대회
• /
• pp.160-161
• /
• 2021

To prepare polyurethane coatings for top coatings of automobiles, acrylic resins containing 75% of solids were synthesized by a radical polymerization. The viscosity of the acrylic resins was increased with increasing OH values. Crosslinked acrylic-urethane clear coatings were obtained by curing reaction between the synthesized acrylic resins and hexamethylene diisocyanate(HDI) trimer(Desmodur N-3600). The physical properties from the following studies were carried out : viscosity(Zahn cup #2), adhesion, pensil hardness, and 60° specular gloss. Various properties of the acrylic-urethane clear coatings as top coatings of mobile coat were evaluated on the coating specimens. Adhesion property to a substrate, 60° specular gloss, and pencil hardness of prepared paint showed quite good properties.