• Fire Science and Engineering
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• v.31 no.2
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• pp.82-88
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• 2017

Manpower will need to be increased to conduct special fire inspections. The aim of this study was to predict the manpower required. According to the estimate, 20,332 inspectors will be needed to conduct special fire inspection on a two-person team basis for a year. If the entire object is to be inspected for five-years, it will be inspected at 20% per year. The currently manpower is not enough to inspect all the objects, which will result in a poor inspection. Therefore, the adoption of a full and partial inspection system will be considered. If 10% full inspection and 10% partial inspection will be conducted, 2,734 inspectors will be needed, whereas if 2% of full inspection and 18% partial inspection are conducted, 1,669 inspectors will be needed.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.332-332
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• 2016

수공구조물 설계시 hardware와 software의 발달로 수리계산과 수치해석의 오차율이 감소함에 따라 수치해석을 이용하는 빈도가 높아지고, 신뢰도가 향상되고 있는 추세에 있다. 그러나 댐 설계에 있어 수위별 방유량 관계 검토시 수치해석값은 각 수위에 해당하는 몇 개의 유량값을 대응시켜 경향만 비교하고 수리계산 결과를 설계에 반영해 왔다. 이러한 방법은 여수로 주변에 인접구조물이 없고, 여수로 각 수문별 균등한 유량이 방류될 경우 문제가 되지 않지만, 여수로 직상류 지형에 만곡부나 지형적 특성이 여수로 방류에 영향을 미치거나, 취수탑 등 여수로에 인접한 수리구조물이 설치되어 접근수로에서 복잡한 유동을 형성하는 경우 각 문비마다 방류량의 분배율은 달라질 수밖에 없고, 수리계산 결과를 일괄 반영하기에는 오차가 증가할 수밖에 없다. 이에 본 연구에서는 댐 운영시 중요한 인자 중 하나인 수위-방류량 관계에 대하여 수치모형을 이용한 정밀한 분석을 통하여 댐 여수로 운영시 오차율을 저감시키고, 적용성을 향상시키는 방안을 검토하였다. 첫째, 수위별 방류량 관계 검토시 여수로 상류에서 일정한 시간에 따라 선형적으로 수위가 증가하도록 경계조건을 설정한 후 3차원 수치해석 모형의 Output data를 단위시간에 따라 수위와 방류량이 산정되도록 하고, 기존 검토 방식대로 각 수위별 모형을 steady 상태로 수행하여 비교분석하였다. 수리계산과 기존 방식, 본 연구에서 제시한 방법에 대한 오차율 검토 결과 오차는 3 % 이내로 검토되었다. 둘째, 수치해석을 이용하여 수위별 방류량 산정시 접근유속에 대한 영향을 받게 되므로 수리계산시 에너지 경사를 이용하여 수위값을 반영하지만, 수치해석을 이용하여 수위별 방류량 산정시 경계조건을 부여한 수위값을 반영하거나, 임의의 지점에서의 수위값을 반영하는 경우 등 일괄적이지 않은 수위값을 반영하여 오차율이 증가하는 경향이 있다. 따라서, 본 연구에서는 여수로 지점별 전수두를 측정하여 방류량 값을 산정하여 비교하였다.

• The Journal of the Korea Contents Association
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• v.21 no.10
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• pp.332-343
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• 2021

This study shows that reality in interactive documentaries can be distinguished between narrative reality and visual reality, which can be defined as a feature of reality-based interactive documentaries. This study reveals the visual reality in that all audiences who visually watched "The Maribor Uprisings" were immersed in the movie presented by the producer, and thus sympathized with the problems of non-violent protests and social conflicts through two-way communication between the audience and the actors. This study also confirms that epic reality in that it can selectively participate in the narrative of movies through questions about democracy in action. Besides, this study finds that the reality expressed in the interactive documentary deepens the audience's 'immersion', showing that the direction of the narrative can be determined by reflecting the opinions of the audience on an event or narrative of the movie. In this process, the audience was found to have the characteristics of being able to recognize and rediscover events in the movie as if they were close to them.

• The Journal of the Acoustical Society of Korea
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• v.29 no.5
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• pp.332-338
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• 2010

Previous studies have investigated the effect of empathy on relations. However, there have been few studies that found the effect of empathy on subjective well-being. This study aimed to investigate relations between empathy and subjective well-being. It was hypothesized that empathy had effects on subjective well-being in the mediation of self-esteem. Heo, J.H. and Lee, C.J. (2010) investigated the psychometric properties of EQ. However they did not do confirmatory analysis. So confirmatory analysis needs to be done in this study. Data was collected from 421 College student (male 192, female 225), and analyzed by SEM and path analysis. Results revealed that 3 factors model of EQ was proper, and EQ had effects on subjective well-being in the mediation of self-esteem. This suggested that empathy be a very important factor in our culture, and fulfillment of cultural task enhance self-esteem, which improve subjectve well-being. And cultural features should be considered in the study of empathy.

• Journal of Korean Society for Atmospheric Environment
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• v.12 no.3
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• pp.323-332
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• 1996

Precipitation samples were collected by the wet-only sampling method at Seoul from September 1993 to June 1995. Sample were analysed for the anions $(NO_3^-, NO_2^-, SO_4^{2-}, Cl^-, and F^-)$ and cations $(Na^+, K^+, Ca^{2+}, Mg^{2+}, and NH_4^+)$ in addition to pH and electric conductivity. In order to establish the chemical analysis data of high quality, the assurance checks for analytical data of precipitation were performed by considering the ion balance and by comparing the measured conductivity with the calculated conductivity. As we applied the various assurance checking methods by the ion balance used until recently to a data set measured in this study, the f value expressed as $\Sigma C/\Sigma A$ was found to be not appropriate for the data screening. Also, the scattering plot between cations and anions in each sample was found to show the general tendency of ion balance but was proved to not quantitate the standard of data screening at a data set of samples of various concentration levels. The h value defined as (A-C)/C for C $\geq$ A and (A-C)/A for C < A was used to check the ion balance. However, the standard of data screening by h value must very in response to total ion concentration of samples. In this study, the quality assurance of chemical analysis data was checked by considering both the ion balance of evaluating by h value and the conductivity balance. Further the quality control was achieved by these quality assurance methods. As the result, 67 samples among total 77 were obtained as valid. As the central tendency value for a statistical summary in the analytical parametr of samples, the volume-weighted mean value was found to represent more the general chemistry of precipitation rather than the arithmetic mean. The volume-weighted mean pH was 5.0 and 25% of samples was less than this mean. The concentrations of sufate and nitrate in precipitation were 90.4 ueq/L and 32.4 ueq/L which made up 59% and 21% of all anions. The raion of $SO_4^{2-}/(NO_3^- + NO_2^-)$ in precipitation was 2.7, which indicates that the contributions of $H_2SO_4$ and $HNO_3$ to the acidity of precipitation are 70% and 30%, respectively.

• The Korean Journal of Ecology
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• v.18 no.3
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• pp.323-332
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• 1995

Effects of wintering and temperature on nitrogen fixation activity of nodules of Melilotus suaveolens Ledeb. grown in the field and growth chamber conditions were investigated. The biennial plants transfered to the growth chamber from winter field recovered the activity in 3 weeks of incubation and attained the maximum rate of $153{\mu}mol\;C_2H_4{\cdot}g$ fr wt $nodule^{-1}{\cdot}h^{-1}$ in 5 weeks. When root nodules which adapted to different temperatures, were pretreated with 10, 20 and $30^{\circ}C$ for 1 hour, and then transfered to $30^{\circ}C$, nitrogen fixation activity was promoted in the nodules exposed to lower field temperature ($12^{\circ}C$) with 1$0^{\circ}C$ pretreatment. M. suaveolens maintained nitrogen fixation activity in the wide range of temperatures, and was more tolerant to lower temperature than those of other woody leguminous plants, Diurnal changes of nodule activity showed increase with sunrise and decrease with sunset during spring and autumn, but the activity was inhibited during July and August because of high temperature with stron irradiation. Nitrogen fixation activity of annual plant appeared in mid-April, and showed two peaks (104 and 43 mol $C_2H_4{\cdot}g$ fr wt $nodule^{-1}{\cdot}h^{-1}$) in July and September, and then disappeared after October. Nitrogen fixation activity of biennial plant reappeared in mid-March after wintering and attained two peaks (102 and 82 ${\mu}mol\;C_2H_4{\cdot}g$ fr wt $nodule^{-1}{\cdot}h^{-1}$) in April and June of flowering period, and then disappeared after July due to plant withering by severe drought.

• Journal of Korean Society on Water Environment
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• v.22 no.2
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• pp.328-332
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• 2006

Fe(III)-impregnated activated carbon (Fe-AC) was applied in the treatment of synthetic wastewater containing Cu(II). To investigate the stability of Fe-AC at acidic condition, dissolution of Fe was studied with a variation of solution pH ranging from 2 to 4. Fe-AC was unstable at pH 2, showing a gradual increase of the dissoluted Fe as reaction time increased, while negligible amount of Fe was dissoluted above pH 3. This stability test suggests the applicability of Fe-AC in the treatment of wastewater above pH 3. Adsorption capacity of Cu(II) onto activated carbon (AC) and Fe-AC was investigated in a batch and a column test. In the adsorption kinetics, rapid adsorption of Cu(II) onto AC and Fe-AC was noted at initial reaction time and then reached a near complete equilibrium after 6 hrs. Adsorption trends of Cu(II) onto AC and Fe-AC were similar, showing an increased Cu(II) adsorption at higher pH. Compared with AC, Fe-AC showed a greater Cu(II) adsorption over the entire pH range studied in this research. From the adsorption isotherm obtained with variation of the concentration of Cu(II), the maximum adsorption capacity was identified as 61,700 mg/kg.

• Journal of Korean Society on Water Environment
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• v.20 no.3
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• pp.251-255
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• 2004

Laboratory experiments were performed to investigate oxidation system using ozone and hydrogen peroxide for treating water contaminated with phenol. We were able to greatly improve the oxidation efficiency of the aqueous phenol using hydrogen peroxide and ozone. Two methods were compared and analyzed in this study. In the consequence through the methods, we concluded that the $O_3/UV$ is superior to the hydrogen the results. The decomposition efficiency of aqueous phenol by $H_2O_2$. was exceeded at 83.3% in the concentration of phenol, 5, 15, 25 ppm, respectively. The rate of decomposition reaction by $H_2O_2$. was very slow. In the occasion of the fractional life, it was determined the value that $1.61{\times}10^{-5}(l/mol)^{1.172}sec^{-1}$, $3.75{\times}10^{-5}(l/mol)^{0.792}sec^{-1}$, $4.11{\times}10^{-5}(l/mol)^{1.782}sec^{-1}$. The rate of decomposition reaction of aqueous phenol by $O_3$ was fast compared to the $H_2O_2$. We concluded that the $O_3$ method is useful with the consideration of the reaction time 30 minutes. In the occasion of the fractional life, it was determined the value that $1.094{\times}10^{-4}(l/mol)^{0.933}sec^{-1}$, $2.1{\times}10^{-4}(l/mol)^{0.842}sec^{-1}$, $7.22{\times}10^{-4}(l/mol)^{1.332}sec^{-1}$.

• Journal of Microbiology and Biotechnology
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• v.7 no.5
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• pp.329-332
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• 1997

Cell-free extracts of Streptomyces neyagawaensis SL-387 grown on a chemically defined medium supplemented with DL-3-amino-3-phenylpropionic acid (APP) produced N-acetyl-APP (Ac-APP) in the presence of APP and acetyl coenzyme A. The APP obtained by acid hydrolysis of the Ac-APP was D-configuration: $[\alpha]_D+6.5^{\circ}(H_2O)\;at\;20^{\circ}C$, optical purity 92% enantiomeric excesses (ee). These results suggest that an N-acetyltransferase exists in the cell-free extract as a novel enzyme with specificity for D-APP.

• Proceedings of the Korean Society for Quality Management Conference
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• 1998.11a
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• pp.325-332
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• 1998

In the context of total quality management, customer satisfaction is a key factor of success. Customer needs have been in the past described with rather vague words. In order to lead in the competitive market, product designers must be willing to interpret and reflect customer perceptions of a product on the design. The objective of this research is to develop a systematic process capable of linking customer preferences on a product to the design of product elements or specifications. The design process consists of multivariate statistical analyses, semantic differentials, and multidimensional scaling techniques under the framework of a methodology known as quality function deployment which is frequently used to construct a quality design process. The process being established is expected to serve as an effective means to communicate between the customer and the designer through proper representational schemes of design elements.