• Journal of Microbiology and Biotechnology
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• 제15권5호
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• pp.1115-1119
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• 2005

The photoheterotrophic $H_2$ production of Rhodobacter sphaeroides was significantly increased through disruption of the genes coding for uptake hydrogenase and poly-${\beta}$-hydroxybutyrate (PHB) synthase (Lee et al., Appl. Microbiol. Biotechnol. 60: 147-153, 2002). In this work, we further removed the B800-850 light-harvesting (LH) complex from the strain and found an increase in $H_2$ production at the light-saturating cell growth (${\ge}10$ Watts $[W]/m^2$). Neither the mutant nor the wild-type produced more $H_2$ at the brighter light. Accordingly, light does not appear to be limited for the $H_2$ production by the presence of B800-850. However, increase in the level of the spectral complexes resulted in decrease of $H_2$ production. Thus, although the B875 is essential for light harvesting, the consumption of cellular energy for the synthesis of B800-850 and the surplus LH complexes may reduce the energy flow into the $H_2$ production of R. sphaeroides.

• Journal of Electrochemical Science and Technology
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• 제9권3호
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• pp.169-175
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• 2018

Cu-Salen complex was prepared and attached into chitosan (Cs) polymer backbone. Nanocomposite of the synthesized polymer was prepared with functionalized carbon nano-particles (Cs-Cu-sal/C) to modify the electrode surface. The surface morphology of (Cs-Cu-sal/C) nanocomposite film showed a homogeneous distribution of carbon nanoparticles within the polymeric matrix. The cyclic voltammogram of the modified electrode exhibited a redox behavior at -0.1 V vs. Ag/AgCl (3 M KCl) in 0.1 M PB (pH 7) and showed an excellent hydrogen peroxide reduction activity. The Cs-Cu-sal/C electrode displays a linear response from $5{\times}10^{-6}$ to $5{\times}10^{-4}M$, with a correlation coefficient of 0.993 and detection limit of $0.9{\mu}M$ (at S/N = 3). The sensitivity of the electrode was found to be $0.356{\mu}A\;{\mu}M^{-1}\;cm^{-2}$.

• 한국전기전자재료학회논문지
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• 제33권6호
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• pp.510-514
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• 2020

Vocational education needs to be transformed to cultivate talents with diverse fusion competencies, which is in line with the recent changes that have become a part of the complex technological developments in the 4th Industrial Revolution. Therefore, it is very important for college graduates to obtain employment skills as they are required to prepare for careers within the complex environments of future societies. With the transition to the Internet of Things (IoT)-based control in the manufacturing industry, the development of technological education and related training programs is required to cultivate practical talents for students who have acquired not only the information on existing programmable logic controller (PLC)-based technology, but also that on embedded programming technology. Therefore, to develop an NCS-based education program for analog signal processing to ensure that programming can easily be learned for cultivating practical talent, this study summarizes the opinions of field experts, selects the appropriate NCS competency unit, and designs an adequate technology education training program.

• Molecules and Cells
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• 제43권2호
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• pp.182-187
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• 2020

When cells are stimulated by growth factors, they make a critical choice in early G₁ phase: proceed forward to S phase, remain in G₁, or revert to G₀ phase. Once the critical decision is made, cells execute a fixed program independently of extracellular signals. The specific stage at which the critical decision is made is called the restriction point or R-point. The existence of the R-point raises a major question: what is the nature of the molecular machinery that decides whether or not a cell in G₁ will continue to advance through the cell cycle or exit from the cell cycle? The R-point program is perturbed in nearly all cancer cells. Therefore, exploring the nature of the R-point decision-making machinery will provide insight into how cells consult extracellular signals and intracellular status to make an appropriate R-point decision, as well into the development of cancers. Recent studies have shown that expression of a number of immediate early genes is associated with the R-point decision, and that the decision-making program constitutes an oncogene surveillance mechanism. In this review, we briefly summarize recent findings regarding the mechanisms underlying the context-dependent R-point decision.

• Bulletin of the Korean Chemical Society
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• 제34권6호
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• pp.1875-1878
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• 2013

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1998년도 추계종합학술대회 논문집
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• pp.71-74
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• 1998

In this paper, an interface method for MMS on ATM networks is proposed. It can apply to the realtime communication and the remote control in wide-area manufacturing complex and virtual factory. It is used for the downloading program, the reporting and gathering of data and the remote control for the remote client. The developed interface rule is basd on the rule for MMS on TCP/IP. The main goals of implementation are to verify whether MMS on ATM is able to meet the requirements of factory automation and manufacturing complex.

• 한국어업기술학회:학술대회논문집
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• 한국어업기술학회 2001년도 춘계 수산관련학회 공동학술대회발표요지집
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• pp.252-254
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• 2001

A great deal of effort has been put into the identification of Alexandrium tamarense/fundyense/catenella complex by understanding correlation between morphological and subcellular characteristics. To date, the most promising tool for the study of these species is sequence analyses of rRNA genes that have been useful for various organisms' taxonomy and phylogeny, and its application such as in situ hybridization. (omitted)

• 가정과삶의질연구
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• 제22권6호
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• pp.89-97
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• 2004

The purpose of this study was to investigate the characteristics of leisure facilities and to examine residents' needs for leisure facilities in apartment complex. The questionnaire survey and content analysis were used. The Data for content analysis were 476 site plans, and the subjects of questionnaire survey were 673 residents lilving in 35 apartment complex. Frequency, Percentage, and mean, ANOVA-A, x^{2}-test, and multiple regression were used for data analysis. The major results were as follows. 1) Facilities for children play, and senior, sports facilities, community center, green area, and resting place were included in leisure facilities in apartment complex. These facilities were different according to complex site and built-period. 2)The degree of satisfaction of leisure facilities was lower than neutral. The satisfaction of leisure facilities related with diversity of leisure facilities and program, and poor environment. 3) Subjects needed the facilities recommended in housing act including diverse leisure facilities such as sports center and resident's self government facilities. And they needed divers facilities for sports. 4) In terms of location, they needed leisure facilities which was closer to their house.

• 대한통합의학회지
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• 제9권2호
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• pp.173-181
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• 2021

Purpose : The purpose of this study was to identify the clinical effect, assessment, method, and recent trend of the programs by systematically reviewed community-based programs for the elderly's quality of life conducted in the last ten years, and to present comprehensive basic data for occupational therapists who want to apply community-based programs improving quality of life. Methods : This study identified 811 studies from among those registered in the RISS, KISS, DBpia, NDSL, and KCI databases from January to September 2020, using "elderly," "community elderly," "65 aged," "quality of life," "occupational therapy," "occupational therapy program," "intervention," and "intervention program" as keywords. From these results, 11 documents were selected. Results : It was found that studies of occupational therapy programs for the quality of life of the elderly have been continuously conducted since 2010, and most of them were non-random control studies. The quality of life evaluation tool used most frequently was SF-36, and WHOQOL-BREF and SF-8 were also used. The selected programs were classified as were exercise programs and complex programs. For most of the exercise programs, interventions were carried out for 12 weeks, three times a week for 30~60 minutes. In the case of the complex programs, the duration of interventions was nine weeks, and the frequency and time per session varied. All of the exercise programs showed significant effects. Among the complex programs, two studies showed significant effects, but the remaining one study did not. Conclusion : Through this study, the types and effects of occupational therapy programs for the quality of life of the elderly were examined. Hereafter, studies of the development and to verify the effects of these programs should be actively carried out.

• 한국안전학회지
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• 제22권5호
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• pp.21-26
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• 2007

The computer program is developed to simulate the evacauation time for a building which is made geometrically complex. The program is intended for use both as a search and a design tool to analyze the evacuation safety through a wide range of structure environments. The computer program has a function of importing FDS's result to each individual resident in the building. These attributes include a walking speed reduction by producing visibility reduction for each person on the fire. $A^*$ pathfinding algorithm is adopted to calculate the simulation of escape movement, overtaking, route deviation, and adjustments to individual speeds due to the proximity of crowd members. Finally, a case study for a theater is presented to compared the calculated evacuation time with SIMULEX in detail. This program contribute to a computer program that evaluates the evacuation time of individual occupants as they walk towards, and through the exits especially for building, underground spaces like a subway or tunnel.