• 지질공학
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• 제16권2호
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• pp.153-159
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• 2006

수질오염이 심각해지면서 수자원의 이용을 어렵게 하며 수자원의 관리를 위해 사용되는 시간적 기술적 경제적 부하도 증대시키고 있다. 그러므로 본 논문에서는 간단하고 신속하게 수질을 파악 할 수 있는 미규제 수질인자($E_{260}$과 입자수)를 도입하여 정수공정의 효율성을 평가하고자 하였다. 탁도저감을 목적으로 주입하는 알루미늄에 의해 용존성 알루미늄의 잔존량이 증가하는 경향이 있으므로 탁도 모니터링만으로는 안전한 수질을 기대하기가 어려움을 명확히 알 수 있었으며, 잔존알루미늄의 농도를 모니터링 하는 대신 간단 신속하게 분석할 수 있는 $E_{260}$인자를 이용할 수 있음을 밝혔다. 또한 탁도 뿐만 아니라 용존성 비소화합물의 모니터링에도 $E_{260}$은 효율적으로 사용되었다. 수처리공정의 효율을 개선하기 위해 수처리제의 교환을 고려할 때에도 탁도 자료만으로는 질적인 개선정도를 평가하기 어려웠으나, 수중의 입자를 계수함으로써 재선정도의 평가가 용이해져 적절한 수처리제의 선택을 가능하게 하므로 수질개선과 경제적 절약을 모두 달성하게 하였다. 따라서 효율적인 정수처리 뿐만 아니라 수자원의 관리 측면에서도 이들 인자는 매우 유용하게 사용될 수 있을 것으로 기대된다.

• Archives of Pharmacal Research
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• 제10권1호
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• pp.9-13
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• 1987

From the aerial parts of Melilotus officinalis (Leguminosae) soyasapogenols B, mp 259-260.deg., and E, mp 246-247, were isolated along with coumarin and kaempferol. This is the first report of the isolation of soyasapogenols from the genus Meliotus.

• 한국수학교육학회지시리즈B:순수및응용수학
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• 제18권3호
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• pp.255-260
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• 2011

In this paper, we define the intuitionistic fuzzy contraction, and obtain some fixed point theorem using common property(E.A.) and weakly compatibility in intuitionistic fuzzy metric space.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제15권4호
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• pp.260-267
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• 2015

In the past, we implemented a web-based smart education platform, but this is not efficient in a smart or mobile education environment. Therefore, in this paper, we propose an Android-based e-board smart platform for a smart or mobile education system. Here, we use Anoto digital pen- and dot pattern-based technologies. This Android-based smart education platform is efficient for a smart education environment. Further, we implement the hardware and software parts of the technologies, an Anoto-based trajectory recognition algorithm, and a probabilistic neural network for handwritten digit and hand gesture recognition.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2012년도 추계총회 및 학술대회 논문집
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• pp.131-133
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• 2012

The photoluminescence (PT) properties of Al-doped ZnO thin films grown by the sol-gel dip-coating method have been investigated. At 12 K, nine distinct PL peaks were observed at 2.037, 2.592, 2.832, 3.027, 3.177, 3.216, 3.260, 3.303, and 3.354 eV. The deep-level emissions (2.037, 2.592, 2.832, and 3.027 eV) were attributed to native defects. The near-band-edge (NBE) emission peaks at 3.354, 3.303, 3.260, 3.216, and 3.177 eV were attributed to the emission of the neutral-donor-bound excitons (D0X), two-electron satellite (TES), free-to-neutral-acceptors (e,A0), donor-acceptor pairs (DAP), and second-order longitudinal optical (2LO) phonon replicas of the TES (TES-2LO), respectively. According to Haynes' empirical rule, we calculated the energy of a free exciton (FX) to be 3.374 eV. The thermal activation energy for D0X in the nanocrystalline ZnO thin film was found to be ~25 meV, corresponding to the thermal dissociation energy required for D0X transitions.

• 농업과학연구
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• 제38권3호
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• pp.453-458
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• 2011

The MC1R (Melanocortin 1 receptor) gene has been known as a causative gene of the coat colors in mammals and responsible for the E (Extension) locus which has three alleles ($E^D$, $E^+$, e) that determines coat colors. The dominant allele $E^D$ produces black or brown colors due to the missense mutation and the recessive e allele has frameshift mutation which shows red or yellow coat colors. Whereas the wild type $E^+$ produces variety of colors due to the interaction with A (Agouti) locus. In this study, PCR-RFLP was performed using two restriction enzymes (BsrF I and MspA1 I) in order to obtain MC1R genotypes in Korean brindle cattle and black cattle. The results showed that all of the animals have the $E^+$ alleles, indicating the $E^+$ allele might related with black coat colors. Later on, the experiments expanded to the 260 Korean candidate bulls whether these animals have the same $E^+$ allele. Among 260 samples investigated, 5% (13/260) of the animals had $E^+$e genotypes, indicating the $E^+$ allele is also present in the candidate bulls in a low frequency. Even though we expected that A locus also affect the black coat color in cattle, all the black coat color animals (brindle and black) have $E^+$ alleles in this study. Therefore, the genotyping of the MC1R gene in candidate bulls will recommended be applied for eliminating of black coat colors in Hanwoo population, if the farmers need to have the brown coat colors only.

• 한국콘텐츠학회논문지
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• 제8권5호
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• pp.260-267
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• 2008

포트폴리오는 장기간에 걸친 학생의 학습과 성장을 타당하게 평가할 수 있는 방법을 제공하며 자기반성을 통하여 실제적 학습을 가능하게 한다. 하지만 포트폴리오의 운영 실태에 따르면 실시에 있어 시간 소요, 장기 보관의 어려움 등으로 인하여 일회적이고 평가를 위해 형식적으로 운영되고 있는 실정이다. 본 논문에서는 학생의 학습 과정과 성장 결과를 총체적으로 파악한 후에 포트폴리오 실시에 따른 물리적 제약요인을 줄이기 위해 학습과 평가를 통합한 e-포트폴리오를 설계한다. 설계한 e-포트폴리오 모델의 효과성을 검증하기 위해 블로그를 기반으로 e-포트폴리오를 운영한 결과 학생들의 학업 성취도에 유의미한 변화가 있었으며 교사를 대상으로 한 활용 가능성도 긍정적으로 나타났다. 따라서 본 연구에서 제안한 e-포트폴리오 운영으로 학습과 평가 기능이 상호 작용적으로 통합된 보다 진전되고 의미 있는 포트폴리오 활용 교육이 기대된다.

• International Journal of Concrete Structures and Materials
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• 제18권2E호
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• pp.133-142
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• 2006

An experimental study was conducted to investigate the effectiveness of transverse steel in reinforced concrete tied columns subjected to monotonically increasing axial compression. Eighteen large-scale columns($260{\times}260{\times}1,200mm$) were tested. Effects of such main variables as concrete compressive strength, configurations of transverse steel, transverse reinforcement ratio, spacing of transverse steel, and spalling of concrete cover were investigated. High-strength concrete columns under concentric axial loads show extremely brittle behavior unless the columns are confined with transverse steel that can provide sufficiently high lateral confinement pressure. A consistent decrease in the deformability of the column test specimens was observed with increasing concrete strength. Test results of this study were compared with existing confinement models of modified Kent-Park, Sheikh-Uzumeri, Mander, and Saatcioglu-Razvi. The comparison indicates many existing models to predict the behavior of confined concrete overestimate or underestimate the ductility of confined concrete.

• 한국염색가공학회지
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• 제15권1호
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• pp.1-7
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• 2003

To study the dyeability(ΔE value) and color depth of silk fabrics dyed with Impatiens balsamina extracts. its flower, leaf and stem was extracted by water. This paper investigated some experiments under the various dyeing conditions such as dyeing temperature, dyeing time, repetition of dyeing, dyeing pH with silk fabrics dyed with Impatiens balsamina extracts. The results obtained were as follows 1. It was found that $\lambda_{max}$ of silk fabrics dyed with Impatiens balsamina extract was 260nm and its flower, leaf , stem and different colored flower(white, pint violet) had same $\lambda_{max}$ at 260nm. 2. $\Delta{E}$ values were increased when dyeing temperature, repetition of dyeing and time was higher, value of munsell of silk fabrics dyed with Impatiens balsamina extract was Yellow-Red. But dyeing temperature, repetition of dyeing and time was higher, shifted to longer wavelenth side. 3. Silk fabric dyed with Impatiens balsamina extracts at acidic pH was colored reddish Yellow-Red, alkali bath colored yellowish Yellow-Red in silk fabrics dyed with Impatiens balsamina extract.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2003년도 춘계학술발표회
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• pp.205-209
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• 2003

The various pretreatment processes were evaluated for removal of oil pollutants with weathered oil contaminated seawater in a reverse osmosis desalination process. Weathered oil contaminated seawater was made by biodegradation and photooxidation with oil containing seawater. Coagulation, ultrafiltration, advanced oxidation processes and granular activated carbon filtration was used with pretreatment for dissolved organic carbon. Crude oil was removed but. weathered oil contaminated seawater was not removed by biodegradation and coagulation. DOC and E260 was removed with about 20 % and 40 % by membrane filter of cut off molecular weight 500. So, the most of dissolved organic carbon in weathered oil contaminated seawater was revealed that molecular weight was lower than 500. It is difficult to remove DOC in weathered oil contaminated seawater by advanced oxidation processes treatment, but, E260 was removed more high. However, DOC in weathered oil contaminated seawater was easily adsorbed to GAC. It is revealed that DOC was removed by adsorption.