• Membrane and Water Treatment
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• 제9권3호
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• pp.155-162
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• 2018

Process modeling with activated sludge models (ASMs) is useful for the design and operational improvement of biological nutrient removal (BNR) processes. Effective utilization of ASMs requires the influent fraction analysis (IFA) of the wastewater treatment plant (WWTP). However, this is difficult due to the time and cost involved in the design and operation steps, thereby declining the simulation reliability. Harmony Search (HS) algorithm was utilized herein to determine the relationships between composite variables and state variables of the model IWA ASM1. Influent fraction analysis was used in estimating fractions of the state variables of the WWTP influent and its application to 9 wastewater treatment processes in South Korea. The results of influent $S_s$ and $Xs+X_{BH}$, which are the most sensitive variables for design of activated sludge process, are estimated within the error ranges of 8.9-14.2% and 3.8-6.4%, respectively. Utilizing the chemical oxygen demand (COD) fraction analysis for influent wastewater, it was possible to predict the concentrations of treated organic matter and nitrogen in 9 full scale BNR processes with high accuracy. In addition, the results of daily influent fraction analysis (D-IFA) method were superior to those of the constant influent fraction analysis (C-IFA) method.

• 수산경영론집
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• 제49권4호
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• pp.1-17
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• 2018

The Korean fisheries industry is a traditional business, the majority of which are small and medium-sized enterprises (SMEs). It has played an important role in the South Korean economies in the past several decades, but it currently faces the limitations of growth potential and profitability due to declining workforce, aging populations, deteriorating fishery environments, climate changes, and rapid changes in the global industrial ecosystem. Many studies have suggested solutions for the fisheries industry in macro perspective, but there are rarely any studies taking the strategic approaches for the problem. If it is possible for governments to support the companies that are likely to increase their value-added selectively, it will break through the current situation more effectively. This paper introduces a study on the selection method utilizing data envelopment analysis (DEA) to find SMEs with potentials to increase profits and growth. We suggest selecting SMEs with high management efficiency and ability to utilize intangible assets as the target companies. We also suggest policy objectives for SMEs in the domestic fisheries industry based on the results of DEA analysis and propose a data-based method for the policy decisions.

• Journal of Plant Biology
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• 제20권4호
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• pp.141-149
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• 1977

In this sampling obtained 7,108 measurements for all trees larger than 2.5cm (1.0 inch) dbh from seven stands in Kwhangnung. In terms of similarity indices seven stands are classified into three kind of forest coniferous, mixed, and broadleaved froest communiteis. For ten major tree species in a three forest communities the size distributions are studied. Two forms of size distributions were observed: (1) linear relationships of log numbers of stem vs. size indicating stablesize distributions; (2) convex to bell shaped size distributions reflecting declining populaitons with a low natality rate. Survivorship analyses showed that successional trends seem to be: Pinus densilfloralongrightarrowQuercus aliena and Q. serratalongrightarrowCarpinus laxifloralongrightarrowC. erosalongrightarrowAcer pseudo-sieboldianum var. Koreanum. These results agree with the results from ordination method. An alternate pathways that Pinus koraiensis seems to be replaced by C. laxiflora were observed. It seems that successional trend is not unidireciton, but rather multi-directional.

• 천문학회보
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• 제36권1호
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• pp.59.2-59.2
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• 2011

Constraining physical (or stellar population) properties - such as stellar mass, star-formation rate, stellar population age, and dust-extinction - of galaxies from observation is crucial in the study of galaxy evolution. This is very challenging especially for high-redshift galaxies, and a widely-used method to estimate physical properties of high-redshift galaxies is to compare their photometric spectral energy distributions (SEDs) to spectral templates from stellar population synthesis models. I will show that the SED-fitting results of high-redshift galaxies are strongly dependent on the assumed forms of star-formation histories. I will also present the results of SED-fitting analysis of observed Lyman-break galaxies which show that parametric models with gradually increasing star-formation histories provide better estimates of physical parameters of high-redshift (z>3) star-forming galaxies than traditionally-used exponentially declining star-formation histories. This result is also consistent with the predictions from the modern galaxy formation models.

• 기본간호학회지
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• 제18권1호
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• pp.87-96
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• 2011

Purpose: The purpose of this study was to investigate the subjectivity of Koreans about well-dying by dividing the cognition and attitudes of Koreans about well-dying into five types and analyzing and interpreting each type. Method: Q-methodology, which is effective in scientifically measuring individual subjectivity, was used. The result of the Q-shorting of the 34 Q-statements by 42 participants was analyzed with the PQM program. Result: Five cognitive types of the subjectivity about well-dying were identified and labeled as follows. Type I: Individual and preparation for the other world. Type II: Receptive to nature and fate. Type III: Oriental and family centered. Type IV: Realistic and self-independent. Type V: Altruistic and preparing for the other world. Conclusions: This study generally show that traditional family connections and blood relationship are declining, and western rationalism and the pursuit of the positive meaning of well-dying are beginning to be accepted in the cognition of modern Koreans.

• 전기학회논문지P
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• 제64권3호
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• pp.153-158
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• 2015

Lights from cities have been a grateful outcome of industrialization and a barometer of how developed the city is. However, indiscriminate exposure to artificial lights caused displeasure to people, ecological crisis to the nature, and overuse of energy. for example, excessive light is cause serious diseases such as sleep disorders, cancer in human, declining populations caused by reducing the ability to reproduce for animals and Plant yield is reduced. Therefore, each local governments have came up with ordinances in accordance with the law "Light Pollution Prevention Act". Accordingly, we've analyzed current Chungcheongbuk-do's current states investigation and reduction method proposed for the light pollution act.

• 농촌계획
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• 제10권4호
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• pp.1-7
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• 2004

In Korea, rural community has been becomming unstable by declining of agriculture. In order to solve this problem, there were some trials to activate rural communities by maintaining rural amenities. But, it is difficult to use rural amenities as a development factor to promote rural communities because there are few researches about quantifying rural amenities. In this study, a method fer quantifying rural amenities is suggested using database normalization technique. Previous thirty seven surveying items of rural amenity resources are formally reduced to five common surveying items, seven resources, and eleven surveying tables. Finally, big picture of rural amenity resource map with surveying data for rural development is suggested.

• 한국간호교육학회지
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• 제10권2호
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• pp.183-193
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• 2004

Purpose: This study attempted to describe the essential structure of male students' experience as nursing majors. Method: The data were collected through the in-depth interviews of seven male students majoring in nursing. The analysis of data were made using phenomenological analytic method suggested by Colaizzi(1978). Result: In this study, five essential themes emerged. They are: $\ulcorner$Strong initial -though subsequently declining- hesitation over choice of major$\lrcorner$, $\ulcorner$Challenging, ongoing effort to survive in an environment of new and unaccustomed experiences and relationships$\lrcorner$, $\ulcorner$Recurring sense of reassurance and relief upon occasions of unexpected success$\lrcorner$, $\ulcorner$Growing internalization and acceptance of their role as nursing students or as future nurses$\lrcorner$, $\ulcorner$Ambivalent feelings resulting from the contradiction between their vision concerning their future as nurses and their worry concerning their future as male nurses$\lrcorner$Conclusion: With an increasing number of male students majoring in nursing, this study will prove helpful not only in understanding male students' experience while majoring in nursing but also in describing their needs for systemic and emotional support.

• 한국실내디자인학회논문집
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• 제25권3호
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• pp.21-30
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• 2016

For the elderly with declining sensory due to aging, various sense stimulation factors provided in indoor environment is desirable healing environment. This study aims to propose the direction of sensory healing environment by adapting the richness of natural environment in indoor place based on the biophilic design theory with implementation method of sensory richness environment. The healing environment was limited to the ward in the beginning, but it has widened its range to the whole place, and the lobby is considered quiet important to healing. Therefore, this study selected lobby space of geriatric hospital as study subject. As for the study method, we deducted the analytic matrix focusing on the property and elements of the direct and indirect experience of nature appearing in the biophilic design theory, and analyzed the field investigation of subject space. Also, this study paid attention to point where the hotel lobby leads the change of emotional environment, and conducted analysis and comparison by deciding this is what the hotel and geriatric hospital should direct to. As the result, the biophilic design factor of hotel is actively expressed by complex direction of various factors, but as for the geriatric hospital, it was rather passive and simple in expression. The adaptation ratio between hotel and geriatric hospital was almost more than twice times difference in average.

• 한국주거학회논문집
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• 제24권5호
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• pp.39-48
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• 2013

The goal of this paper is to assess the monetary value of each of the programs, by estimating the amount of willingnessto- pay for the urban regeneration programs that are being carried out in the art media space. Using the Sajik 2-dong in the City of Cheongju that is undergoing urban regeneration through 4 art mediated programs as the subject of this study, the monetary value was calculated through a contingent valuation method (CVM) that used double double-bounded question method. As a result of the analysis, the amount of willingness-to-pay for urban regeneration programs was found to be 36,250 won monthly average per household and, when this was converted to reflect all the households in the Sajik 2-dong area, the amount was estimated to be approximately 117 million won. In addition, in the case of the respondents who have experienced such programs, the amount of willingness-to-pay was found to be monthly average wise 12,880 won higher than those respondents who have not. As a result of the measurement of values based on art mediated urban regeneration programs, the Byeol-ddong-dae for children culture exploration program showed as having the highest value, followed by the local resident festival program, street puppet program and the resident autobiography program.