• Microbiology and Biotechnology Letters
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• v.3 no.3
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• pp.135-140
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• 1975

For the purpose of producing single cell protein out of an agricultural waste, chestnut-bur was hydrolyzed with 4％ H$_2$SO$_4$, solution for 30 min under the steam pressure of 1.5kg/$\textrm{cm}^2$, and 21％ saccharification of the original carbon source was obtained. When Candida tropicalis was grown in the hydrolyzate the cell yield remained only 21％ of the original sugar suggesting a necessity of further treatments.

• Resources Recycling
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• v.6 no.2
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• pp.47-59
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• 1997

Thc paper points oul ever increasing amounts of plastics used in dex, clopmg countries and the prohlelns associated with such increase. Tl~e current status of the production and usc of plaslic materials is reviewed. Also reviewed lncludc thc pahcicies and gu~dclmcs canccrning the treatment of used plastics which have already bccn mstitutcd.

• Research in Plant Disease
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• v.14 no.3
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• pp.201-204
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• 2008

We've been involved in collection and domestication of Agrimonia pilosa from 2005 to 2007. We observed agrimony powdery mildew caused by Sphaerotheca aphanis. The powdery mildew developed twice a year, in May to June and mid August to September on whole plants of A. pilosa plants, that is, leaves, stem and floral part. We sprayed the Cooking Oil & Yolk mixture (COY) to control the agrimony powdery mildew. When COY was single-sprayed to control agrimony powdery mildew, its control value was 26.9%. However when it was double-sprayed and triple-sprayed at seven days interval, its control value increased up to 80.8 and 82.7%, respectively. Upon the first spray, symptoms of powdery mildew disappeared within three days and suppressive effect of COY was persisted for only seven days. Thereafter, powdery mildew was relapsed to develop. However, on double to triple sprays, powdery mildew was suppressed more than 28 days after final treatment. Therefore, it is concluded that double spray of COY at seven days interval can control effectively agrimony powdery mildew.

• The Korean Journal of Malacology
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• v.31 no.2
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• pp.129-136
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• 2015

To introduce an oyster rack culture in tidal flat of Wando-gun, Korea, we investigated sanitary conditions from 2012 April to 2013 March in oyster growing waters and adjacent area in Wando. Average seawater temperature and salinity ranged $8.6-28.0^{\circ}C$ and 26.2-33.6 psu, respectively. The coliform group and fecal coliform of seawater ranged < 1.8-13.0 MPN/100 mL each. Only one of 60 samples was exceeded in the European criteria of fecal coliform. Influence of adjunct basin's pollution load on cultural waters was negligible, which half radius of dilution was not above 300 m. According to our observation, however, landing of oyster should be banned for at least 5 days after the heavy rainfall. Our findings meet the sanitary seawater criteria for domestic use and export of shellfish and classified as 'Class A' in European Community regulations for bivalve culture.

• Phonetics and Speech Sciences
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• v.14 no.3
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• pp.41-49
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• 2022

The average acoustic distribution of American English speakers was statistically compared with the English-speaking patterns of gifted students in a Science Academy in Korea. By analyzing speech recordings, the duration time of which is much longer than in previous studies, this research identified the degree of acoustic proximity between the two parties and the predictability of English academic achievement of gifted high school students. Long-term spectral acoustic power distribution vectors were obtained for 2,048 center frequencies in the range of 20 Hz to 20,000 Hz by applying an long-term average speech spectrum (LTASS) MATLAB code. Three more variables were statistically compared to discover additional indices that can predict future English academic achievement: the receptive vocabulary size test, the cumulative vocabulary scores of English formative assessment, and the English Speaking Proficiency Test scores. Linear regression and correlational analyses between the four variables showed that the receptive vocabulary size test and the low-frequency vocabulary formative assessments which require both lexical and domain-specific science background knowledge are relatively more significant variables than a basic suprasegmental level English fluency in the predictability of gifted students' academic achievement.

• Fire Science and Engineering
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• v.27 no.2
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• pp.89-96
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• 2013

In this research, the fire mistaken dispatch records for the past 11 years have been analyzed by using a statistic technique. Fire mistaken dispatch occurred yearly average $48,371{\pm}5,763$ time at 95 % confidence level. This is 1.2 times more than the dispatch for extinguishing the fire. Fire mistaken dispatch has been increased mainly by malfunctioning alarm among other various reasons and the reason of mistaken dispatch is different depending on the population of the region. In big cities, the burning smell accounts for the most of mistaken dispatch but in rural areas, the garbage incineration is the major reason for mistaken dispatch. As a result of calculating the mean time between fire mistaken dispatches (MTBFmd) by region, MTBFmd of Daejeon is 20.61 hr/time and its reliability is 95.26 % at t=1 hr. On the other hand, the MTBFmd of Gyeonggi is 0.58 hr/time and its reliability is 17.91 % at t=1 hr.

• Korean Journal of Health Education and Promotion
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• v.2 no.1
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• pp.93-106
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• 1984

Today, elderly people has desperately felt isolation and desolation due to the loss of activity at home and society by the change of social structure and the tendancy of nuclear family. The mutual-relationship between parants and their children is important to solve the problem of eldery people's isolation and desolation. The present study was conducted to investigate the status of mutual-communication by visiting, telephone and letter on 678 parents over 55 years of age and 1,316 their adult children from September 1st to 30th, 1982. It was investigated with questionaire by students. The frequency of communication from children to parents was highest in 25.4% by telephone and 21.6% by visiting, 4 times a month. Correspondence of letter showed only 18.1% in a year. The frequency of communication from parents to children was highest 16.1％ by telephone and 15.6％ by visiting, 4 times a month. Correspondence of letter showed only 11.3％ in a year. Urban parents showed higher frequency than rural parents by visiting and telephone, but lower by letter. The older age group of children showed higher frequency than the younger by visiting and telephone but 3rd decade was highest by letter. The younger age group of parents showed higher frequency than older age group. Mother was showed higher frequency than father by visiting and telephone, but father by letter. Higher education level group showed higher frequency than lower education level group. Merchants and factory workers showed the highest frequency by visiting and telephone, but officials by letter. Upper class group in socio-economic status showed higher frequency than lower class group generally, but lower class group dy letter from parents to children. The group within samedistrict between parents and children showed the highest frequency by visiting and telephone, but the group within long distance by letter.

• Korean Journal of Food Science and Technology
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• v.53 no.6
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• pp.792-798
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• 2021

This study was conducted to determine the washing conditions in which surfactants were not detected after washing fruits and vegetables with detergent. Residual surfactants were analyzed using LC-MS/MS. The analyzed surfactants were LAS, SLES, AOS, SLS, CAPB, and LDAO. The survey found that 14% of the respondents used detergent correctly according to the directions indicated. After soaking the samples with 0.2% detergent, the average residual surfactant content was 2.61%. Soaking under 1% and 5% of the detergent, 4.68-5.50% of surfactant remained in the sample. In cherry tomatoes, the surfactants were below the LOD after rinsing twice. However, lettuce was rinsed three times. These results suggest that when using detergent for washing fruits and vegetables, following the labelled usage and rinsing at least three times in 30 seconds could minimize residual surfactants.

• Journal of Korean Library and Information Science Society
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• v.54 no.1
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• pp.1-24
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• 2023

The history of modern libraries in Korea is less than 150 years. Nevertheless, there are various issues about when the word library appeared, how it was transformed, and the name and overall appearance of the library opened by the Busanpo branch of the Nihon Kodo-kai during the enlightenment period. Therefore, this study analyzed and argued many issues. As a result, it was found that the word library appeared in poetry collections, tombstones, and diaries from the early Joseon dynasty. Although it was widely held that the library was first introduced by Yu Gil-jun's 「Seoyugyeonmun, 1895」, it appeared in Lee Hun-young's 「Iisajipryak」 and was also introduced in 「Hanseongsunbo, 1884」. And the first name given to the facility was Kodo library, which was opened by the Busanpo branch on October 10, 1901. Book club, reading club (library), Busan(Busan district) library, Kodo bookstore, Kodo-kai library, etc. which are described in many documents are all errors. The location of the library was a temporary house on a leased site in Seosanhajeong of Yongdusan mountain. And it is presumed that it has secured about one room and 1,000 Japanese and Western books, and provided fee-based services to Japanese residents. Although the Kodo library is not the first public library established by a Korean, it is undeniable that it was the first public library to exist in Korea. Therefore, when defining the character of the Kodo library, it is necessary to have a coolness and discernment beyond national emotions, historical conflicts, and ideological frames.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 1998.05a
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• pp.60-60
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• 1998

아연도금강판은 내식성이 우수하여 자동차용 강판으로 널리 쓰이고 있다. 자동차용 강판은 spot 용접에 의해서 각 부분들이 접합되는데 도금층으로 사용되는 아연은 강판보다 융점이 낮아서 용접작업을 저하시킨다. 현재 사용되는 작업조건에서 용접 타 접수가 평균 2000회를 넘게되면 용접되는 부위의 면적이 감소되어 접합강도가 떨어지게된다. 따라서, 아연이 도금된 강판을 용접하게되면 작업성이 저하되므로 도금층의 성분에 대한 변화를 주므로서 이에 대한 개선을 할 필요가 있다.. Cole, Dickenson 및 Kimchi 등은 도금충내의 알루미늄을 0.1~0.5%(중량비) 함유하는 아연도금강판은 저항용접시 도금충내의 알루미늄 함량에 따라 용접성이 영향을 받는다고 보고하였다. 전극수명은 도금층내의 알루미늄 함량이 증가할수록 떨어지는데 알루미늄이 0.5% 이 하로 함유된 아연도금강판의 경우는 용접타접수가 2000~6000회에 이르르나 알루미늄 이 50%이상 함유된 합금도금강판은 200-600회에 불과한 것으로 나타난다. H. M Matsuda 등은 도금층의 알루미늄이 용접성에 영향을 미치는 이유로서 도금층의 용융 온도 변화를 지적하였다. 도금충내에 알루미늄의 함량이 높게되면 철과 아연의 확산에 의한 합금화 반응이 저하되어 도금층의 용융온도가 높아지지 못하므로 용접성이 나빠지게 된다. 본 연구에서는 아연도금욕의 조성은 기존의 상태로 유지하고 제3의 원소를 첨가하여 도금층에 함유되는 알루미늄의 양에 미치는 효과를 조사하였다. 도금층의 불성변화 및 그에 따른 내식성을 조사하였으며 도금층의 조직변화도 함께 관찰하였다. 아울러 첨가원소에 의한 도금욕의 특성도 평가하였다. 첨가원소에 의해서 도금충내의 알루미늄 함량은 감소하는 경향을 나타내었으며 도금층의 물성은 주어진 조성범위 내에서 별다른 변화를 나타내지 않았다.brittlement)기구도 제안되고 었다. 원전의 냉각수는 고 순도의 물이지만 수 처리 과정과 웅축기 배관의 누수로 인한 산소, $Cu^{2+},{\;}S_xO_6{\;}^{2-}(x=3~6)$ 등이 유입되어 오염되는데 이려한 오염물질들이 수 ppm정도 소량 포함된 경우 응 력부식민감도는 상당히 증가된다. 산성분위기 흑은 산소, $Cu^{2+}$, 등이 소량 포합된 산화성 분위기 그리고 sufur oxyanion 에 오염된 고온의 물에서 600 의 IGSCC 민감도는 예민화도가 증가할 수록 민감하여 304 의 IGSCC 와 매우 유사한 거동을 보인다. 본 강연에서는 304 와 600 의 고온 물에서 일어나는 IGSCC 민감도에 미치는 환경, 예민화처리, 합금원소의 영향을 고찰하고 이에 대한 최근의 연구 동향과 방식 방법을 다룬다.다.의 목적과 지식)보다 미학적 경험에 주는 영향이 큰 것으로 나타났으며, 모든 사람들에게 비슷한 미학적 경험을 발생시키는 것 이 밝혀졌다. 다시 말하면 모든 사람들은 그들의 문화적인 국적과 사회적 인 직업의 차이, 목적의 차이, 또한 환경의 의미의 차이에 상관없이 아름다 운 경관(High-beauty landscape)을 주거지나 나들이 장소로서 선호했으며, 아름답다고 평가했다. 반면에, 사람들이 갖고 있는 문화의 차이, 직업의 차 이, 목적의 차이, 그리고 환경의 의미의 차이에 따라 경관의 미학적 평가가 달라진 것으로 나타났다.corner$적 의도에 의한 경관구성의 일면을 확인할수 있지만 엄밀히 생각하여 보면 이러한 예의 경우도 최락의 총체적인 외형은 마찬가지로 $\ulcorner$순응$\lrcorner$의 범위를 벗어나지 않는다. 그렇기 때문에도 $\ulcorner$