• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.2
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• pp.319-325
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• 2021

A fine dust measurement using drones is becoming an increasingly common technology, and air pollutants can be identified through dust monitoring in partial industrial areas. A station for measuring fine dust provides information at large construction site offices. On the other hand, it was difficult to check the fine dust in the pollutant source accurately. Therefore, the drone took measurements directly after been placed at the site. While measuring fine dust, monitoring noise occurred due to the influence of the drone's down-wind during landing, but the measurements were similar to the numerical value of the grounded pollution source on the height of 30 m. The field applicability to the study area has limitations in periodic updates using satellite images because the terrain was constantly changing due to considerable flattening fieldwork. Therefore, this study implemented a system that can reflect real-time field information through GIS mapping using drones.

• The Korean Journal of Archival Studies
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• no.16
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• pp.97-146
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• 2007

Those days when people used paper to make up and manage all kinds of documents in the process of their jobs are gone now. Today electronic types of documents have replaced paper. Unlike paper documents, electronic ones contribute to the maximum job efficiency with their convenience in production and storage. But they too have some disadvantages; it's difficult to distinguish originals and copies like paper documents; it's not easy to examine if there is a change or damage to the documents; they are also prone to alteration and damage by the external influences in the electronic environment; and electronic documents require enormous amounts of workforce and costs for immediate measures to be taken according to the changes to the S/W and H/W environment. Despite all those weaknesses, however, electronic documents increasingly account for more percentage in the current job environment thanks to their job convenience and efficiency of production costs. Both the government and private sector have made efforts to come up with plans to maximize their advantages and minimize their risks at the same time. One of the methods is the Authorized Retention Center which is described in the study. There are a couple of prerequisites for its smooth operation; they should guarantee the legal validity of electronic documents in the administrative aspects and first secure the reliability and authenticity of electronic documents in the technological aspects. Responding to those needs, the Ministry of Commerce, Industry and Energy and the Korea Institute for Electronic Commerce, which were the two main bodies to drive the Authorized Retention Center project, revised the Electronic Commerce Act and supplemented the provisions to guarantee the legal validity of electronic documents in 2005 and conducted researches on the ways to preserve electronic documents for a long term and secure their reliability, which had been demanded by the users of the center, in 2006. In an attempt to fulfill those goals of the Authorized Retention Center, this study researched technical standard for electronic record information package of the center and applied the ISO 14721 information package model that's the standard for the long-term preservation of digital data. It also suggested a process to produce and manage information package so that there would be the SIP, AIP and DIP metadata features for the production, preservation, and utilization by users points of electronic documents and they could be implemented according to the center's policies. Based on the previous study, the study introduced the flow charts among the production and progress process, application methods and packages of technical standard for electronic record information package at the center and suggested some issues that should be consistently researched in the field of records management based on the results.

• Journal of Gifted/Talented Education
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• v.25 no.5
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• pp.749-765
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• 2015

This study is aimed at validation of the Korean Version of the Perfectionism Inventory which was developed by Hill et al.(2004). To do so, exploratory factor analysis and confirmatory factor analysis with 167 science high school and 161 middle school gifted students were conducted. It appeared 6 factor structure consisting of 'Self-Evaluative Perfection Strivings', 'Parental Pressure', 'Planfulness', 'Striving for Excellence', 'High Standards for Others', and 'Organization', which does not support 8 factor of the original scale. As a result, Cronbach's ${\alpha}$ ranged from .78 to .92 for subscale of PI and .93 for the total scale. The fit of measurement model was found to be ${\chi}^2=1257.618$ (df=792, p=.00), TLI=.903, CFI=.911, RMSEA=.047, indicating most of fit indexes were acceptable. Also, the validity of the scale was examined by the correlations between the PI and MPS. PI Korean version is significant to confirm the factor structure and validity of perfectionism which was influenced by characteristics of gifted students and Korean culture. These results show that the PI is quite reliable and valid tool for measuring perfectionism for gifted students.

• Journal of Korea Soil Environment Society
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• v.3 no.1
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• pp.11-20
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• 1998

Inorganic nitrogens resulting from fertilizers are possible contaminants of bank-filtered ground water, which is an alternative source of safe drinking water. We conducted a laboratory study to determine the fate of inorganic nitrogens in the near field of bank filtration sites and we consequently illustrated the effects of these possible contaminants on the water quailty of bank filtration. Soil properties were found to be well equivalent to those of other cultivated field soils in Korea. Surface soil pH was about 4.3 which is slightly lower than average level. Overall, diverse concentrations of $NO_3$-N and $NH_3$-N were measured, and $NO_2$-N was nearly undetected. $NH_3$-N level in the field decreased, while $NO_3$-N increased along with increasing depth of unsaturated zone. Numbers of viable and nitrifying bacteria ranged from 6.73$\times$$10^{6}$to 10.7$\times$$10^{6}$ and 0.44$\times$$10^{4}$ to 5.21$\times$$10^{4}$ respectively, and both of them were highly correlated ($R^{2}$=0.992). Nitrifying potential assayed by batch test showed relatively lower than other reported results. The oxygen uptake potential of surface and subsurface soil was measured in the presence of ${(NH_4)_2}$$SO_4$. The results demonstrated that surface soil required shorter lag period and uptaked more oxygen than subsurface's.

• Korean small business review
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• v.41 no.3
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• pp.151-172
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• 2019

The changes in the 4th industrial revolution era are not limited to specific sectors, but affect all sectors of industry. Thus all companies are required to respond effectively to changes. Some companies response by adopting cutting-edge ICT and some companies improve the organizational structure, or enhance the competence of individual employees. This study is based on the assumption that the responses to the change in the 4th industrial revolution era should not be uniform, and that the response strategies and priorities should vary according to the characteristics of the companies. The purpose of this study is to suggest both different response strategies and the priority of the responding factors(areas) to small and medium-sized enterprises. Data were collected through the semi-Delphi method. As a result of data analysis, the priorities of the medium-sized enterprises were as follows: introduction of IT-strengthening the competence of the individuals - establishing technology infrastructure-improving organizational structure - efficiency of work - improving organizational culture. While the priorities of the response factors(area) of the small-sized companies were as follows: strengthening the competence of the individuals - efficiency of work - introduction of IT - establishing technology infrastructure - improving organizational structure - improving organizational culture.

• The Journal of the Korea Contents Association
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• v.8 no.12
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• pp.246-255
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• 2008

The purpose of this study is to suggest the way of effective management of real estate brokerage business by establishing the Job Model in real estate brokerage business in Korea. The AHP method, designed for professionals in a field, is used to establish the Job Model. The main result and implication of the study are as follows. The study found that real estate brokers recognize the importance of getting knowledge and information about the patterns and changes of the real estate market and economy, for the effective management of real estate brokerage business. The study therefore suggest that it is necessary to provide the brokers with education chance for the knowledge about the real estate market and economy.

• Journal of the Korean Society for Marine Environment & Energy
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• v.12 no.4
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• pp.296-301
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• 2009

The ENCs, which is a database for the use of maritime navigation within the ECDIS on the ships are recently being utilized in wide marine applications. But, even though official ENCs have been produced according to the IHO S-57 and S-52 standards, current ENCs are limited to their static characteristics of contents and structures being inherited from the analog media style of the traditional paper charts. Thus these limitations are often recognized as barriers to the full use of high resolution and advanced digital technologies. This paper presents prototype development results which demonstrate dynamic ENC features using high density ENCs and simulated tidal information to support various marine GIS fields as well as efficient and safe navigation purpose.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.7
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• pp.4478-4488
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• 2015

This paper aims to develop and validate a situational judgement test to diagnose the Competencey of public ethics for undergraduates. A criterion group composing of high performers was formed. Critical incidents and responses were developed from interviews with members of the criterion group. Also an expert committee was composed of six university members who have professional knowledge and experience on Competencey based selection or education. This committee reviewed all the items developed and selected some of them for the final test. Item validity and reliability were examined through the final test that 519 college students took. The result of the confirmatory as well as exploratory factor analysis showed that the Competencey of public ethics consisted of 2 sub-elements which were work ethics and democratic citizenship. The correlation between results of the test and the HEXACO model was statistically significant. Overall, the findings of the study highlight that a situational judgement test can be developed and utilized to diagnose Competencey levels of public ethics for undergraduates.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.39 no.6
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• pp.709-717
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• 2002

A new multi constant modulus algorithm (MCMA) for a blind decision feedback equalizer is proposed. In order to avoid the error propagation problem in the conventional DFE structure, Feed-Back Filter coefficients are updated only after Feed-Forward Filter coefficients are sufficiently converged to the steady state. Therefore, it has the problem of slow convergence speed characteristics. To overcome this drawback, the proposed MCMA algorithm uses not only new cost function considering the minimum distance between the received signal and the representative value containing the statistical characteristics of the transmitted signal, but also adaptive step-size according to the equalizer outputs to fast convergence speed of FBF. Simulations were carried out under the certified communication channel environment to evaluate a performance of the proposed equalizer. The simulation results show that the proposed equalizer has an improved convergence and SER performance compared with previous methods. The proposed techniques offer the possibility of practical equalization for cable modem and terrestrial HDTV broadcast (using 8-VSB or 64-QAM) applications.

• Journal of Korea Soil Environment Society
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• v.4 no.3
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• pp.35-43
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• 1999

Biotransformation of inorganic nitrogens, which are possible contaminants of bank filtered water, in soil of near bank filtration site was investigated based on oxygen consumption and changes of chemical parameters in respirometer. Biotransformation activities of inorganic nitrogens at different conditions of pH. water content. and added initial${NH_4}_2$$SO_4$were compared. At original low pH and 20% of water content, nearly no biotransformation activity of inorganic nitrogen was observed, in addition, control and NH$_4$-added sets did not show any significant differences of oxygen consumption. Among tested conditions, the highest activity was observed at 25% water content and pH 8. Nearly 98% nitrification activity was observed at sets amended with 400 mg $NH_4$-N/kg soil as${NH_4}_2$$SO_4$in the condition of pH 8 and 20~23% water content. However, considerable activity of subsequent denitrification was not observed.