• Journal of Powder Materials
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• v.8 no.3
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• pp.207-209
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• 2001

Nano particles have recently been a major research interest, motivated by their unusual physical and chemical properties. Such particles can be synthesized using physical and chemical methods. The physical methods need expensive installation like vacuum induction furnace, whereas in chemical methods the process in generally very simple and low cost. In this study, simple and new fabrication process by using ultrasound was investigated to prepare the nano-sized metal particles on various powders at room temperature.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.10a
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• pp.199-201
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• 2015

Nowadays, the issue of maritime safety is an extremely important issue in the maritime industry and Human' Stress is one of the biggest causes of maritime accidents. The purpose of this study was to research and compare the risk marine accidents analysis methods and find the methods which used to analysis data of the human' stress and obtained the relationship between it and the risk of maritime accidents.

• Culinary science and hospitality research
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• v.21 no.6
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• pp.49-62
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• 2015

Give that statistical analysis is an essential component of foodservice-related research, the purpose of this review is to analyse research trends of statistical methods applied to foodservice-related research. To achieve these objective, this study carried out a content analysis on a total of 251 out of 415 research articles published in The Korean Journal of Culinary Research(TKJCR) from January 2010 to December 2013. Of the total 164 research articles focussing on natural science research, qualitative research, articles written in English were excluded from the scope of this study. The results of this study are as follows. First, it turned out that 269 research articles applied quantitative research methods, and only 10 articles applied qualitative research methods among the 279 research articles based on social science research methods. Second, 20 article (8.0%) among the 251 did not specify the statistical methods or computer programs that were used for statistical analysis. Third, it was found that 228 articles (90.8%) used the SPSS program for data analysis. Fourth, in terms of frequency of use, it was revealed frequency analysis was most used, followed in order by reliability analysis, exploratory factor analysis, correlation analysis, regression analysis, structural equation modeling, confirmatory factor analysis, t-test, variance analysis, and cross tabs analysis, However, 3 out of 56 research articles that used a t-test did not suggest a t-value. 10 out of 64 articles that used ANOVA and demonstrated a significant difference in between-group mean did not conducted post-hoc test. Therefore, the researchers with interest in foodservice fields need to keep in mind that choosing and applying the correct statistical technique both determine the value and the success or failure of a study. To enhance the value and success of a study, it is necessary to use the proper statistical technique in an efficient way in order to prevent statistical errors.

• Korean Journal of Child Studies
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• v.30 no.5
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• pp.1-8
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• 2009

For the purpose of this analysis of trends in research on creativity of preschool children, 98 volumes with articles on the creativity of preschool children were selected from 6 reliable Korean academic journals. Analysis was for year, content, research methods, research design, and subjects. Results showed that (1) the changes by year were that the number of qualitative researches increased from 4 articles in 1998 to 24 articles in 2006. (2) The greatest amount of research content concerned educational methods for the generation of creativity. (3) Most research methods were empirical studies. (4) The most used measurement scale was the Korean Comprehensive Creativity Test for Young Children (Jeon, 2000). (5) Most data analyses were by t-test.

• Journal of Korean Academy of Nursing Administration
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• v.7 no.3
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• pp.561-569
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• 2001

This study was designed to analyze all the papers that were in the Journal of the Korean Nursing Administration Academic Society from the first publication edition (1995) to 2000. Analyses methods are research designs, data collection methods, research subjects and key words. all papers were 145. The results of the study are as follows : First, research designs, nonexperimentals are 106 papers, experimentals are 9, qualitatives are 9 papers. Research subjects that all subjects in each paper were accepted are as follows, hospital staffs including nurses, doctors, and other employees are 115 paper(59.28%), adults including patient's family, medical, nursing students are 44 papers(22.68%), informatic systems including medical record sheets, database, and management system are 8 papers(4.12%), others including country, literature, researches are 21 papers(10.82%). Second, data collection methods that all methods in each paper were accepted that questionnaires are 93 papers(57.76%), interviews are 13 papers(8.07%), observations are 10 papers(6.21%), scale & psycholgical are 8 papers(4.97%), and self-reportings are 6 papers(3.73%), etc. Conclusion : Even though research topics are various, the fields of informatics and financial management are poor. Therefore studying for those fields and its practical implication are needed.

• Journal of the Korea Furniture Society
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• v.15 no.2
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• pp.1-17
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• 2004

This paper attempted to review measuring methods of formaldehyde emission from wood-based panel products. Methods included for the discussion were desiccator methods, extraction method, and various chamber methods. First, the procedures and testing conditions of 24-hour desiccator method was critically reviewed, and an improvement of this method was proposed to meet international standards. Two different small chamber methods ($20\ell$ and $1m^3$ chamber methods) were also compared in terms of their advantages and disadvantages. In addition, the regulation levels of formaldehyde emission of wood-based composite panels were compared for different countries. The selection of a reference method of measuring formaldehyde emission of wood panel products should consider the ease of conducting test and cost required. Results should be exchangeable for different methods.

• Journal of The Korea Institute of Healthcare Architecture
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• v.17 no.2
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• pp.35-44
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• 2011

The aim of this study is to review the literature addressed the methodology to measure and evaluate the health outcomes as evidences for health benefits through the study on the healing environment, garden, therapeutic garden and viewing landscape and so forth. The research methods and measures used to assess health effects in the reviewed studies have applied in a different way ranged from quantitative methods (physical measures or quantitative observations) to qualitative methods (qualitative observations and surveys). In a literature review of research articles on the health outcomes have been found various research methods and measures used to assess health effects. This study will be concentrated mainly on methodological considerations in order to find the significant evidences related to evidence-based design (EBD). Future research should build the body of methodological knowledge to find more empirical evidences as sound scientific data and to improve the effectiveness of design interventions.

• Environmental Analysis Health and Toxicology
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• v.24 no.3
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• pp.261-270
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• 2009

To make measurable regulatory decisions of chemicals, it is necessary to consider their effect on the human health and ecosystem. In principle, this is based on relevant toxicity studies conducted by accepted guidelines. However, current regulatory programs in various countries confront challenges related to risk assessment of large numbers of chemicals within the restricted resources and time. Therefore there is a need for more efficient approach to limit the number of tests to be conducted. This promotes the development of powerful nontesting methods (e.g. (Q)SARs) and permits to use the predicted data for regulatory purpose. In this article, current status of non-testing methods in various chemical regulatory programs was reviewed in terms of their application and research activity on them. Finally, their usefulness associated with development of domestic regulatory program was suggested.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.25 no.12
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• pp.679-684
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• 2013

Hazardous chemicals emitted from building materials and furniture have led to social problems such as sick house syndrome. Test methods for the evaluation of pollutant emissions from furniture-like products have been applied using various national and international standards and classifications, but they are not currently unified. This research has been done to organize the various standards and certification methods and to make new classification systems. Proper test methods have been proposed, tested, and analyzed through this research.

• ETRI Journal
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• v.26 no.3
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• pp.241-251
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• 2004

We propose two improved scalar multiplication methods on elliptic curves over $F_{{q}^{n}}$ $q= 2^{m}$ using Frobenius expansion. The scalar multiplication of elliptic curves defined over subfield $F_q$ can be sped up by Frobenius expansion. Previous methods are restricted to the case of a small m. However, when m is small, it is hard to find curves having good cryptographic properties. Our methods are suitable for curves defined over medium-sized fields, that is, $10{\leq}m{\leq}20$. These methods are variants of the conventional multiple-base binary (MBB) method combined with the window method. One of our methods is for a polynomial basis representation with software implementation, and the other is for a normal basis representation with hardware implementation. Our software experiment shows that it is about 10% faster than the MBB method, which also uses Frobenius expansion, and about 20% faster than the Montgomery method, which is the fastest general method in polynomial basis implementation.