This paper was evaluated manufacturing properties for core material of self-healing capsules using cement powder, it was found that coagulants for coagulation of core materials were important factors in manufacturing core materials.

As a first step of mapping genes conferring resistance to the brown planthopper, Nilaparvata lugens Stål, in Gayabyeo using a population derived from a cross between Gayabyeo and Taebaegbyeo, we performed the whole genome resequencing of these two Tongil-type rice varieties. The amount of raw sequence data was about 18.5X109 bp and 17.9X109 bp in Gayabyeo and Taebaegbyeo, respectively. After quality trimming and read mapping onto Nipponbare reference genome sequence, 9.3X109 bp was mapped in Gayabyeo with mapping depth of 25.0X, and 9.5X109 bp was mapped in Taebaegbyeo with mapping depth of 25.5X. Between Gayabyeo and Nipponbare, 1,585,880 SNPs were detected, while 1,416,898 SNPs were detected between Taebaegbyeo and Nipponbare. Between Gayabyeo and Taebaegbyeo, 284,501 SNPs were detected. Among the SNPs between Gayabyeo and Taebaegbyeo, 21.2% were in genic region and 78.8% were in intergenic region. In CDS region, 15,924 SNPs were detected, among which synonymous SNPs covered 47.3% and non-synonymous SNPs covered 52.7%. We designed Cleaved Amplified Polymorphic Sequences (CAPS) markers with SNPs in the restriction enzyme recognition sites, and 20 CAPS markers were tested. Of the 20 markers, 19 markers showed polymorphism and one marker showed monomorphism between Gayabyeo and Taebaegbyeo. It is expected that sufficient DNA markers for mapping genes with a population derived from a cross between Gayabyeo and Taebaegbyeo can be developed based on the results of the study.

This study was examined the variation of unit water content and fine aggregate ratio in concrete for nuclear power structure using a large amoung of crushed sand.

With the development of nanotechnology, nanomaterials are used in various fields. Therefore, the interest regarding the safety of nanomaterial use is increasing and much effort is diverted toward establishment of exposure assessment and management methods. Occupational exposure limits (OELs) are effectively used to protect the health of workers in various industrial workplaces. This study aimed to propose an OEL for domestic multi-walled carbon nanotubes (MWCNTs) based on animal inhalation toxicity test. Basic procedure for development of OELs was examined. For OEL estimation, epidemiological study and quantitative risk assessment are generally performed based on toxicity data. In addition, inhalation toxicity data-based no observed adverse effect level (NOAEL) and benchmark dose (BMD) are estimated to obtain the OEL. Three different estimation processes (NEDO in Japan, NIOSH in USA, and Baytubes in Germany) of OELs for carbon nanotubes (CNTs) were intensively reviewed. From the rat inhalation toxicity test for MWCNTs manufactured in Korea, a NOAEL of 0.98 mg/㎥ was derived. Using the simple equation for estimation of OEL suggested by NEDO, the OEL of 142 μg/㎥ was estimated for the MWCNT manufacturing workplace. Here, we used test rat and Korean human data and adopted 36 as an uncertainty factor. The OEL for MWCNT estimated in this work is higher than those (2-80 μg/㎥) suggested by previous investigators. It may be greatly caused by different physicochemical properties of MWCNT and their dispersion method and test rat data. For setting of regulatory OELs in CNT workplaces, further epidemiological studies in addition to animal studies are needed. More advanced technical methods such as CNT dispersion in air and liquid should be also developed.

In this paper, analyzed the effect on repair mortar by anhydrite blain, by observing workability.

본 논문은 강섬유의 일부를 철근집합체로 대체하여 초고강도 섬유보강 철근 콘크리트 I 형보의 연성거동을 유도하는 것을 목적으 로 한다. 강섬유와 철근집합체의 조합을 가진 초고강도 콘크리트 I 형보 대한 휨거동 실험을 수행하였다. 강섬유의 혼입률은 0%, 0.7%, 1%, 1.5%, 2%이다. 철근집합체와 PS강연선 집합체가 압축구역에서 콘크리트를 구속하기 위해 사용되었다. 철근집합체와 강연선 집합체의 길이 도 실험요소 중 하나이다. 이러한 실험요소를 조합하여 9개의 초고강도 철근 콘크리트 I 형보를 제작하였다. 강섬유 뿐만 아니라 종방향의 철근 집합체도 초고강도 철근 콘크리트 I형 보의 연성거동을 유도하는데 효과를 가지고 있다. 강섬유 혼입률 0.7% 또는 1%와 철근집합체를 사용한 조합이 I형 보의 효과적인 연성 거동을 보여주고 있다. 하중과 처짐관계 및 균열양상 등이 좁은 간격을 가진 작은 직경의 종방향 철근 집합체의 유용성을 나타내고 있다.

This study was investigated the influence of increase in compressive strength according to water reducing ratio. As a result of the analysis, it is determined that compressive strength according to water reducing ratio was increased by increasing the efficiency of cement.

This study was evaluated compressive strength of age 28 days of binary blended concrete according to there type of superplasticizer and there type of w/c. In addition, we are proposed modification prediction model equation that can reflect efficiency of water reducing and influence of binders using Lyse equation to predict the compression strength through the conventional W/C.

Recently, in Seoul there is a growing interest in the L type gutter between the street and the sidewalk because the broken gutter spoils the appearance of the city. The gutter has been viewed as an unimportant attached facility of the road despite an important drainage facility. Also, the gutter lost function by various deterioration actions is becoming hideous objects of streets. Accordingly, many engineers recognized problems about the gutter and tried to seek for solution. In this study, we desired to confirm that the inside of the gutter concrete was not deteriorated even if the surface of the gutter concrete was deteriorated by the de-icing salts. We could obtain thirty core specimens deteriorated by de-icing salts in Seongbuk-gu which is old downtown, has many hills such as Arirang-Hill, Miari-Hill, etc. in Seoul and test compressive strength. It was confirmed that the compressive strength of the gutter concrete follows normal distribution and it is statistically significant 1% level that the population mean of the compressive strength of the gutter concrete is more than 18MPa.

농업에 있어서 기술혁신이 필요한 시기이다. 전 세계적으로 자유무역경쟁체제가 심화되고 있다. 양질의 농산물을 저렴하게 생산 공급하는 국가와 기업이 경쟁력을 더 가지게 된다. 또한 농업 생산에 도전적인 요소로 가뭄 등 심각한 기후변화 상황에 직면하고 있다. 미래 농업은 ‘고생산력’, ‘고품질’ 그리고 ‘고경쟁력’을 마련하여 줄 수 있는 있는 기술혁신을 필요로 한다. 그 기술혁신은 식량 작물을 정밀하게 이해하는 것에서 시작한다. 󰡔피노믹스󰡕는 작물의 표현이나 기능을 로봇+영상+정보 기술을 농업에 융합하여 정밀하게 측정하는 시스템이다. 식물 표현 및 기능 관찰에 있어서 기존의 아날로그식 육안 관찰 방식으로부터 디지털 통합 융합기술시스템으로 진화를 한 것이다. 피노믹스는 기존 아날로그 방식에서 얻는 단순 정보보다 수십 배에서 수백 배에 상당한 생산성 및 품질 관련 정보를 획득 가능하게 하여 준다. 이는 농업 전 분야에 있어서 새로운 성장 동력이면서 경쟁력 향상에 큰 도움이 된다. 유럽의 여러 국가는 이런 점에서 피노믹스 관련 기술개발과 세계시장 확보에 전력을 다하고 있다. 특히, 현재는 종자산업 분야와 농업 생산물의 품질 관리에 적극 적용하고 있다. 피노믹스는 또한 우리나라 스마트 자동 팜의 기초기반기술이다. 피노믹스는 수천가지 작물 표현 및 기능 특성을 담은 빅데이터 생산이 가능하게 하여 준다. 작물 생장 반응 빅데이터는 최고의 생산성 획득을 위한 스마트 팜 환경 조절에 활용 가능하다. 피노믹스에서 얻은 식물 생산 능력 정보에다 생산물의 유통정보를 더하면 소비자 맞춤형 농업생산 공급이 가능하도록 하여줄 수 있다. 농촌진흥청은 2017년까지 80억을 피노믹스 인프라 구축에 투자 예정이다. 현재 농업 관련 연구개발 규모를 고려하면 더욱 큰 규모의 확실한 투자가 필요하다고 본다. 튼튼한 미래 혁신농업 구현을 위해서는 신속한 피노믹스 인프라의 구축 및 활용이 필요한 때이다.

In this paper, was examined the basic properties of mortar using perlite, vermiculite, natural and artificial lightweight aggregate as a part of the basic study for development of lightweight repair mortar.

This study evaluated the lateral thermal deformation induced by environmental factors for a precast I-girder. Lateral temperature gradients across the cross-section of the girder were calculated using analytical equations based on daily solar radiation, temperature variation, and wind speed. Then the lateral thermal deformation showed an average of approximately 40% to 71% of the tolerance for the initial lateral deformation of the girder, defined in the PCI bridge design standard.

This study evaluated the fracture strength of GFRP-strengthened RC beams caused by the debonding failure of the GFRP. The fracture strength of RC beams calculated using FRP debonding strains suggested by several main design guidelines were higher than those of experiments. The result might indicate the need of some reduction in the values of the debonding strain or the strength reduction factor.

콘크리트용 무기계 방수제는 내부 막을 형성하지 않기 때문에 무기계 방수제의 침투깊이 정량적으로 평가하기 어렵다. 그러나 무기계 방수제의 침투깊이 평가는 일관된 침투효율을 확보하는데 있어서 매우 중요한 평가지표 중 하나이다. 따라서 본 논문에서는 콘크리트용 무기계 방수제의 침투깊이 측정방법을 고안하였으며, 고안된 침투깊이 측정방법을 통하여 기존 무기계 방수제의 침투깊이를 평가하였다. 실험결과 고안된 무기계 방수제의 침투깊이 측정방법을 통하여 평가된 침투깊이는 90% 이상의 신뢰성이 있는 것으로 나타났다.

An experimental study was performed to evaluate the ultimate strength of GFRP-strengthened RC beams compared to those obtained from main design guidelines. The results of this study indicated that ultimate strength method requires accounting for the stiffness of the applied FRP and the value of concrete compressive stain for its application to strengthened beams.

Recently, the amount of the mineral admixture including fly ash and ground granulated blast-furnace slag was increased for the purpose of CO2 gas emission reduction in the concrete industry. However, in the case of korea, estimation model of strength development in concrete structural design code was prescribed a constant value according to cement type and curing method about the portland cement. therefore, the properties of strength development according to time of concrete using fly ash and ground granulated blast-furnace slag does not reflected estimation model of strength development. Accordingly, this paper was evaluated strength according to time on the concrete strength range using fly ash and ground granulated blast-furnace Slag and the strength development constant Bsc of concrete according to the kind of the mineral admixture and mixing ratio was proposed

본 연구에서는 2차원 수치모형을 이용하여 폭풍해일고에 따른 해안도시지역 내에서의 범람모의 및 분석을 수행하였으며, 적용된 대상지역은 2003년 태풍 "매미" 내습 시 가장 피해가 컸던 지역인 경남 창원시 마산 합포구 신도시 지역 일부이다. 적용된 수치모형의 검증차원에서 태풍 "매미" 발생기간 동안 관측된 폭풍해일고 자료와 대상지역 내의 주요 지점에 대한 침수흔적 자료를 이용하여 비교 분석을 수행하였다. 또한 향후 발생 가능한 수퍼 태풍에 의한 영향을 분

제4기 동안 지구적 규모에 걸쳐 진행된 빙하의 소장은 육상 및 해안의 지형발달에 큰 영향을 끼쳤다. 이와 같은 기후의 변화는 한반도의 비대칭 요곡융기와 결부되어 동해안에서 관찰할 수 있는 여러 단의 단구 형성 과정에 영향을 주었고, 하천의 침식기준면 변화를 가져와 하천 양안에 독특한 지형을 형성하였다. 또한 내륙 산지 사면에서 동결ㆍ융해가 반복되는 환경을 조성하여 다양한 사면 상 지형의 발달을 촉진하였다. 특히 제4기의 특수한 환경은 영남 지역의 해안과 내륙에 다양한 모습으로 그 흔적을 남겨놓았다. 제4기 환경과 관련하여 관찰할 수 있는 일련의 지표환경은 영남지방 일대에서 다수 나타난다.

The growth performance of Eastern white pine (Pinus storbus L.) was studied with six provenances in four plantations. All growth performances were significantly different among provenances and plantations. The most outstanding source in volume growth at age 39 is North Carolina in all plantations and this trends had been started from four years old seedlings. In plantations, the growth is best in ChunCheon plantation while that is worst in GunPo plantation. The Effect of plantations was thought to be larger than that of provenances growth of P. strobus. A pattern of growth by ages was different by among plantations and even ate age about 40, the growth was still vigorous. Annual precipitation, foggy days, altitude and sand contents in soil are positively correlated with growth and the correlations between by ages were very high.