이논문에서는 metal organic chemical vapor deposition(MOCVD)에 의해서 성장된 InGaAsP/InP이종접합구조의 격자부정합이 Photoluminescence(PL)효율에 미치는 영향을 연구하였다. 격자부정합은 (400)과 511 x-ray reflection을 통해 측정하였고, 부정합 전위의 유무는 x-ray to-pography와 PL imaging을 통해 확인했다. PL강도 측정결과, 상대적으로 높은 PL강도는 탄성적으로 스트레인을 받은 시료에, 낮은 PL강도는 전위로 인해 비탄성적으로 변형된 시료에서 얻어졌다. 성장온도에서 격자정합된 시료의 PL효율이 실온에서 가장 높은 것을 알 수 있었다. PL강도와 X-ray반치폭과 관계에서, 시료의 광전자 특성이 구조적 특성과 밀접하게 연관됨을 알 수 있었다.

흰쥐로부터 뇌, 심장, 관장, 폐, 신장 및 흉선 등 12종류의 기관을 계통별로 해부하여 homogenates를 만들고 cytosol을 분획한 다음, 이것을 효소원으로 하여 inosltol phosphates 대사회로에서 핵심효소인 PLC, IP_3K 및 Ins(1, 4, 5)P_3 5-phosphatase의 활성도를 조직별로 비교 측정하였다. 흰쥐의 뇌에서 분리 정제된 53KDa의 IP_3K를 Balb/c 마우스에 면역 후 비장 세포를 얻어서 골수암세포인 myeloma cells (SP_2/Ag 0-14)에 세포융합, 스크리닝 및 클로닝과정을 거쳐서 anti IP_3K murine monoclonal antibodies를 만들었다. 이 과정에서 18개의 hybridoma clone이 얻어졌고 그 중 10개의 clone만이 nonspecific binding에 기인되는background가 낮았다. Ascitic fluid를 생산시킨 후 그 Ab를 Affi-gel 15로 정제하여 IgG의 subtype을 결정하였다. 이 항체들 중에서 IgG_1과 IgG_2b를 함께 사용하여 조직의 IP_3K에 대한 immuno 반응성을 검증한 결과 대체로 비슷한 비경쟁적 저해를 보였으며 뇌조직의 IP_3K가 예민한 반응을나타내었고, 심장조직에서는 현저히 activity가 낮았다. 흰쥐의 뇌로부터 16, 100배로 정제된IP_3K효소를 사용하여 얻어진 Km값은 1.8mM, 최대반응속도V_max 값은 5.41μ㏖/mln/㎖이었다. Western blot 결과 심장조직에서는 40KDa의 IP_3K만이 관찰되었으며, 뇌속에는 면역학적으로 서로 다른 3가지의 IP_3K(53, 51 및 40KDa)가 존재하였다. 그 중 53KDa의 단백질이 활성이 큰 주 효소이며, 1.8Kb의 IP_3K gene을 완전히 encoding하는 ^32P-labeled cDNA를 probe로 만들어 Northern blot법으로 IP_3K의 mRNA를 정량한 결과 성장단계별로 이들은 모두 transcriptional 수준으로 조절받고 있음을 밝혔다.

This study evaluates the quality of surface air temperature, relative humidity, and precipitation detection observed by 22 internet of thing (IoT)-based mini-weather stations in Seoul in 2020 summer. The automatic weather station (AWS) closest to each IoT-based station is used as reference. The IoT-based observations show surface air temperature and relative humidity are about 0.2-4.0°C higher and about -1--22% lower than the AWS observations, respectively. However, they exhibit temporal variability similar to the AWS observations on both diurnal and daily time scales, with daily correlations greater than 0.90 for temperature and 0.82 for relative humidity. Given these strong linear relationships, it show that temperature and relative humidity biases can be effectively corrected by applying a simple bias correction method. For IoT-based precipitation detection, we found that precipitation conductivity value (PCV) during precipitation events is well separated from that during non-precipitation events, providing a basis for distinguishing precipitation events from non-precipitation events. When the PCV threshold is set to 250 for precipitation detection, the highest critical success index and the bias score index close to one, suitable for operational precipitation detection, are obtained. These results demonstrate that IoT-based mini-weather stations can successfully measure surface air temperature, relative humidity, and precipitation detection with appropriate bias corrections.

The purpose of this experimental study is to chloride ion penetration resistance performance of concrete using Nano-TiO2 Carrier. As a result, concrete using Nano-TiO2 Carrier was confirmed to be superior than ordinary concrete and commercial TiO2 concrete chloride ion penetration resistance performance.

The purpose of this study is to investigate the mechanical properties of cold-mixed recycled asphalt (CMRA) using Nano-TiO2 carrier. As a result, mechanical properties of CMRA using Nano-TiO2 carrier was confirmed to be superior than CMRA using commercial TiO2. Also, it was confirmed to be performance of equal or higher than of existing technology.

본 연구에서는 분쇄한 순환골재 분말(RAP)을 건설소재로 활용하기 위하여 순환골재 및 RAP의 재료적 특성을 파악하고, 시멘트 대체재로 RAP를 적용한 모르타르의 물리·역학적 특성을 분석하였다. RAP 입도분석결과, 볼밀 시간이 증가함에 따라 0.6mm 입도의 분포량이 증가하고, 조립률은 감소하는 것으로 나타났다. RAP를 치환한 모르타르의 유동성은 Plain 보다 향상되었으며, 이는 RAP를 결합재 대체재로 적용함으로서 잉여수의 증가하고 이로 인해 유동성이 증가된 것으로 판단된다. RAP를 적용한 모르타르의 압축강도 평가 결과, 치환율이 증가함에 따라 압축강도가 낮아지는 경향을 나타내었지만, 약 10%까지는 치환하여 사용가능한 것으로 판단된다. 이상의 연구로부터 분말화한 순환골재는 잔골재 대체재로서도 품질특성을 만족할 수 있는 것으로 나타났으며, 본 연구 범위에서는 결합재 대체재로 약 10% 적용시 유동성 개선 및 강도 확보가 가능할 것으로 판단된다.

Background: Recently, jujube (Zizyphus jujuba Mill.) has been attracting attention as a fruit, and its cultivation in rain shelter house is increasing to produce the high quality fresh jujube. This study was carried out to investigate the growth and fruit characteristics of jujube according to the types of rain shelter house. Methods and Results: The characteristics of 5-year-old Bokjo cultivar cultivated in 3 types of rain shelter house, multi span rain shelter house with roof vent (Type I), single span house with a column in the center and roof vent (Type II) and single span house with a column in the center and without roof vent (Type III), and open field were examined. The sprouting and blooming period were different among the types of rain shelter house. The diameter of main stem was higher in rain shelter houses than in the open field. There was no a significant difference in fruit number per leaf stem among the types of cultivation. The incidence of fruit cracking in open field cultivation which was 51.2% was much higher than that in Type I 21.6%, Type II 19.3%, and Type III 25.5%. The fruit size and weight in rain shelter houses, especially in Type III rain shelter house were higher than those in the open field and the soluble solids content of fruit in Type I and Type II was higher than in Type III rain shelter house and the open field. Conclusions: The results show that the growth and fruit quality of jujube were improved by cultivation in rain shelter house, and affected by the types of rain shelter house.

Background : The rhizome of ginger (Zingiber officinale) is widely used as a spice or a traditional medicine. It contains the phenolic compounds, such as gingerol, zingerone and shogaols as the major pungent compound. Ginger is commonly used for various types of "stomach problems," including motion sickness, colic, upset stomach, gas, diarrhea, irritable bowel syndrome (IBS), nausea. The cultivation area of ginger is 1,046 ha, and it is cultivated as 5th of 55 medicinal crops in Korea (2016). When ginger is cultivated in a vinyl house, the growing periods can be prolonged by early sowing and the yield is improved compared to the conventional cultivation. This experiment was carried out to investigated on growth, rhizome shape and yield as affected by the soil covering in rain-shelter greenhouse. Methods and Results : Seed ginger was planted on March 10 at 75 × 15 ㎝ planting density in greenhouse. The soil covering on furrow area was carried out on June 20, July 20 and August 20. The control, conventional cultivation was planted four rows on 120 ㎝ wide ridge. As a results of applying the soil covering, emergence was 2 - 3 days earlier than that of conventional cultivation. On November 5, samples were harvested for each treatment, and growth characteristics, tuber shape, and yield were investigated. As the number of soil-cover increased up to 3-times, the weight of the tuber increased to 44.4% and the length to 21.9% as compared with the control. However, as the number of soil-cover increased, workspace was needed, resulting in fewer seeding gingers and lower total yield. Therefore, it was advantageous to perform two times soil-cover to obtain the maximum yield. In the case of soil cultivation, the length of the foot was longer than that of conventional cultivation, and the quality was improved. Conclusion : From the above results, it is recommended that the soil covering is carried out twice at greenhouse’s cultivation. The first covering is in mid-June, and the second is in mid-July.

Background : Zingiber officinale is known as the source of the pungent, aromatic spice called ginger. Ginger, especially dried rhizomes, has been widely used for many medicinal purposes. The pungent principles in ginger are the non-volatile phenolic compounds gingerol, gingeridione and shogaol. It is cultivated 1,046 ha as 5 th of 55 medicinal crops in Korea (2016). Ginger has been successfully propagated using internodal cuttings. Ginger emergences at 18℃ or higher, and it takes about 40 - 50 days to emerges after sowing. Therefore, it is required a cultivation method that promote the emergence. Methods and Results : The internodal cuttings with 25 – 35 g was planted on 30 April at 30 × 30 ㎝ on 120 ㎝ broad bed. Five covering materials included the illite non-woven fabric (18 g/㎡), rice straw and vinyl were treated to promote emergence and early growth. Soil temperature covered by illite non-woven fabric was higher by 2.6 - 2.8℃ than that of rice straw covering, and lower by 2.2 - 2.4℃ than that of the transparent vinyl mulching. Emergence was faster in the illite non-woven fabric mulching by 5 - 6 days compared to vinyl mulching. It was presumed to be due to the small diurnal difference with increasing soil temperature. The covering with illite non-woven fabric had a large plant height and a large leaf number. So, the early growth in the covering of illite non-woven fabric was better than other treatments. There was a differences in rhizome’s yield among treatments. The content of gingerol was 2.29 – 2.37 ㎎/g and there was no significant difference. Conclusion : From the above results, covering illite non-woven fabric until sprouting after planting promoted its emergence and early growth.

The purpose of this experimental study is to investigate performance for atmosphere purification of concrete sidewalk block using high performance Nano TiO2 Carrier. As a result, concrete sidewalk block using high performance Nano TiO2 Carrier was confirmed to be superior than commercial TiO2 concrete sidewalk block to atmosphere purification.

The purpose of this experimental study is to investigate the influence of chemical resistance of porous concrete using high performance nano TiO2 Carrier. As a result, porous concrete using high performance nano TiO2 Carrier was confirmed to be superior than ordinary concrete and TiO2 concrete chemical resistance.

In this paper, the effect of steel fiber-reinforced cement composite (SFRCC) on damage resistance of steel tube member. Test results show that the cumulative energy dissipation of SFRCC specimen was about 14% higher than that of Con specimen.

The purpose of this experimental study is to carry out test for the surface finishing material of parking lot using Cross-linking agent(Zinc Oxide). The specimen was fabricated by KS F 4937, Cross-linking agent 2%, 3%, 4% is mixed in water soluble acrylic resin. As a result, bond strength of surface finishing material using Zinc oxide 4% was confirmed to be superior than surface finishing material using ordinary Acrylic resin.

The purpose of this experimental study is to investigate the application of materials of construction using TiO2. The functional Al2O3-TiO2 carrier powder was fabricated by sol-gel method, this is mixed in a cement mortar. As a result, compressive strength of mortar using Al2O3-TiO2 powder was confirmed to be superior than mortar using ordinary TiO2.

In recent years, not only the cultivation area of Jujube in Korea but also the number of pest species has increased. The farmers farming environmentally friendly are in great difficulty because there are no effective control devices. This study was conducted to investigate the control effect of the insect screen net on three pest species (Apolygus spinolae, Dasineura sp. and Carposina sasakii) in Jujube orchard when the pests were blocked by insect screen net. For the first and second surveys, the damage rates by A. spinolae were 9.06, 13.95% in 50 mesh, 4.75, 10.17% in 25 mesh, 5.68, 11.84% in 18mesh mesh of insect screen net and 21.6, 36.34% in untreated insect screen net, respectively. The damage rates by Dasineura sp. were 0.54, 0.13% in 50 mesh, 0.93, 2.84% in 25 mesh, 1.05, 13.45% in 18 mesh mesh of insect screen net and 11.1, 26.65% in untreated insect screen net. Carposina sasakii were completely blocked in all the treatments. Damages on Jujube were not observed by insect screen net. Therefore, insect screen net is effective on insect pest control for Jujube.

Background: This study were performed to determine the effect of root pruning of Zizyphus jujuba var. inermis (Bunge) Rehder. Root cutting inhibit vegetative growth and promote reproductive growth as temporarily reducing growth, net assimilation, water potential of leaf and cytokinin level. Methods and Results: The root pruning was treated of the root cutting widths 50, and 80㎝ and the root cutting depths 10, and 20㎝. The amount of root pruning and the number of suckers were the highest in the root-pruning treatment at a width of 50㎝ and a depth of 20㎝. The blooming time was from June 18 to 20, and no difference was observed in the blooming time among the rootpruning treatments. The number of flowers was rather higher in the root-pruning treatment at a width of 50㎝ and a depth of 20㎝ and at a width of 80㎝ and a depth of 20㎝. The percentage of fruit setting was higher in the plants whose roots were pruned at a depth of 20㎝ than in the untreated plants. The fruit size, fruit weight, and sugar content showed no difference among the root-pruning treatments. Conclusions: The results showed that percentage of fruit setting increased with root pruning, while no difference was observed in the growth and fruit quality of plants.

The purpose of this experimental study is to investigate the application of materials of construction with MWNT and TiO2. high performance nano MWNT-TiO2 carrier was fabricated by sol-gel method and performance analyzed by XRD and SEM. As a result, high performance nano MWNT-TiO2 carrier was no significant differences in coating state, crystallinity and microstructure.

In this study, Early compressive strength analysis of low carbon mortar using industrial byproducts and describes relationships between strength property and CO2 indices to evaluate eco-efficient of low carbon binder mortar. Based on the results, this study is to give fundamental data for ability of eco-efficient low carbon binder.

The purpose of this experimental study is to investigate the application of materials of construction with MWNT and TiO2. high performance nano MWNT-TiO2 carrier was fabricated by sol-gel method and performance analyzed by XRD and SEM. As a result, high performance nano MWNT-TiO2 carrier was no significant differences in coating state, crystallinity and microstructure.