• Architectural research
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• v.14 no.1
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• pp.11-18
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• 2012

College of Architecture, Georgia Institute of Technology, Atlanta, GA, US Abstract The intermittent heating and cooling energy need calculation of the ISO 13790 monthly method was examined. The current ISO 13790 method applies a reduction factor to the continuous heating and cooling need calculation result to derive the intermittent heating and cooling for each month. This paper proposes a method for the intermittent energy need calculation based on the internal mean temperature calculation. The internal temperature calculation procedure was introduced considering the heat-balance taking into account of heat gain, heat loss, and thermal inertia for reduced heating and cooling period. Then, the calculated internal mean temperature was used for the intermittent heating and cooling energy need calculation. The calculation results from the proposed method were compared to the current ISO 13790 method and validated with a dynamic simulation using EnergyPlus. The study indicates that the intermittent heating and cooling energy need calculation method using the proposed model improves transparency of the current ISO 13790 method and draws more rational outcomes in the monthly heating and cooling energy need calculation.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.13 no.5
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• pp.38-48
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• 2004

Recently the use of high-speed equipment in machine-tool industry has greatly increased, which requires the development of prognostics and prediction methods on the design stage. Conversion of the test/experiments stage from real to virtual reality will not only significantly reduce the design and manufacturing cost, but will also increase design quality. This paper shows how it is possible to develop the automated system for the design calculations of the air-bearing spindles. First, the general calculation method is introduced. It contains several steps, namely, geometry identification, pressure calculation, stiffiness calculation, dynamics characteristics calculation. For geometry identification reducing spindle shaft to rings was proposed, which helps to automate the calculation process. For pressure calculation the Peshti method was implemented. For stiffiness calculation the analysis was made, which shown the necessity of correct calculation step selection. Then the system of ordinary differential equations containing influence coefficients was evolved, which is used for trjectories calculation. The graphical representation of the calculation results shows the dynamic behavior of the spindle unit concerning various working conditions. Finally, this automated system is illustrated by an example of the air-bearing spindle calculation.

• The Journal of the Korea Contents Association
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• v.20 no.4
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• pp.111-123
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• 2020

It is very important to ensure usability and inclusion in product design and development. Exclusion Calculation, developed by Simon Keates and P. John Clarkson at Cambridge University's Engineering Design Center, assesses the usability and inclusiveness of the product. In context of inadequate research on effectiveness of Exclusion Calculation, this study carried out the experimental evaluation of electric iron and discussed the effectiveness of the Exclusion Calculation from usefulness, accuracy of its evaluation results and the intuitiveness of the evaluation items. 11 designers used Exclusion Calculation in product evaluation and estimated the intuitiveness of 14 evaluation items in Exclusion Calculation by questionnaire. Then usefulness of the evaluation results was discussed and the accuracy of the evaluation results was analyzed by standard deviation. From the evaluation results, the research found that Exclusion Calculation could help designers identify the usability problems and the generality of usability problems related to the physical characteristics of the products, but it can not find the problems from logical aspect of using. In addition, the ambiguity of the evaluation scale in Exclusion Calculation leads to lower accuracy of the evaluation results. Most of evaluation items in Exclusion Calculation were easy to be identified and judged, while evaluation items related to cognitive abilities are less intuitive.

• Journal of Korean Biological Nursing Science
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• v.15 no.4
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• pp.155-163
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• 2013

Purpose: The purpose of this study was to identify the mediating effect of confidence for drug calculation in the relationship between interest in medication and drug calculation competency using learning style. Methods: Participants in this study were 421 nursing students from Busan and Kyungnam province. The scales of learning style, interest in medication, importance of perception, confidence for drug calculation, and drug calculation competency for nursing students were used in this study. Descriptive statistics, $X^2$-test, t-test, Pearson correlation coefficient, and stepwise multiple regression were used for data analysis. Results: Learning styles of the participants were diverger 19.0%, accommodator 30.9%, converger 21.1%, and assimilator 29.0%. The drug dose calculation competency of participants was relatively low with a mean score 66.73. There were significant positive correlations among drug dose calculation competency, interest in medication (r=.31, p<.001), and confidence for drug calculation (r=.44, p<.001). Confidence for drug calculation was a moderator between interests in medication and drug calculation competency. Conclusion: Based on the result of this study, confidence for drug calculation promoting strategy such as medication reconciliation and various learning technology for improving drug calculation competency are needed.

• Journal of the Society of Naval Architects of Korea
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• v.34 no.1
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• pp.102-110
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• 1997

In a shipyard, computer calculation is not frequently used for the grain stability calculation because of large difference between calculation values and real values. Therefore, the necessary calculation process for grain stability is done manually. GUI(Graphical User Interface) is adopted for the convenience of users and interactive data I/O. The hold shape (girder, hold, etc.)needed for calculation are visualized using GLBAX which is a 3 dimensional graphic library. The interface with the ship basic calculation package is also implemented. The aim of this paper is to develop a reliable interactive grain stability calculation program which reduces computational time, and is to computerize the grain stability calculation procedure.

• Bulletin of the Society of Naval Architects of Korea
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• v.15 no.1
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• pp.7-9
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• 1978

In this calculation of statical stability of a ship, mechanical integrator was used most popularly and the direct calculation method such as a Barn's wedge method was also adopted in some cases. Both of the above method was developed for manual calculation which include mechanical integration or drafting procedure on body plan. Therefore, the computerization of stability calculation by the above method is very difficult. In this paper a simplified method for stability calculation is suggested, with based on hydrostatic data and immerged wedged characteristics.

• Management & Information Systems Review
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• v.23
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• pp.201-231
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• 2007

Taxi is one of the representative transpotation method in Korea. This is the study on the method of taxi fare calculation. So this study tries to find out the resonable method of taxi fare calculation. Many research institutes have tried to find out good method of taxi fare calculation. Until now, there has not been any standard method of taxi fare calculation. So the purpose of this study is to provide the best method of taxi fare calculation. This is the example of the method of taxi fare calculation. Both studies of related literature and empirical investigation have been reviewed to accomplish the purpose of this study.

• Journal of Korean Academy of Nursing
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• v.42 no.5
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• pp.689-698
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• 2012

Purpose: This study was done to develop and evaluate a drug dosage calculation training program using cognitive loading theory based on a smartphone application. Calculation ability, dosage calculation related self-efficacy and anxiety were measured. Methods: A nonequivalent control group design was used. Smartphone application and a handout for self-study were developed and administered to the experimental group and only a handout was provided for control group. Intervention period was 4 weeks. Data were analyzed using descriptive analysis, ${\chi}^2$-test, t-test, and ANCOVA with the SPSS 18.0. Results: The experimental group showed more 'self-efficacy for drug dosage calculation' than the control group (t=3.82, p<.001). Experimental group students had higher ability to perform drug dosage calculations than control group students (t=3.98, p<.001), with regard to 'metric conversion' (t=2.25, p =.027), 'table dosage calculation' (t=2.20, p =.031) and 'drop rate calculation' (t=4.60, p<.001). There was no difference in improvement in 'anxiety for drug dosage calculation'. Mean satisfaction score for the program was 86.1. Conclusion: These results indicate that this drug dosage calculation training program using smartphone application is effective in improving dosage calculation related self-efficacy and calculation ability. Further study should be done to develop additional interventions for reducing anxiety.

• Journal of Korean Biological Nursing Science
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• v.14 no.3
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• pp.174-182
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• 2012

Purpose: The objective of this study was to identify predictors of drug calculation competence of nursing students. Methods: A total of 120 students were recruited from 3 universities from November 10 to 20, 2011. The instruments for this study were drug calculation competence, self-efficacy for drug dosage calculation, anxiety for drug dosage calculation, and the academic self-efficacy scale. The data were analyzed by descriptive analysis, chi-square test, t-test, Scheffe test, partial correlation coefficients, and stepwise multiple regression using the SPSS 18.0 program. Results: The mean score of good competence group was $0.67{\pm}0.08$ and the mean score of no-good competence group was $0.42{\pm}0.10$. The drug calculation competence was positively related to self-efficacy for drug dosage calculation and academic self-efficacy scale, but negatively related to anxiety for drug dosage calculation after controlling personal attributes. The main predictors of drug calculation competence in nursing students were identified as anxiety for drug dosage calculation (${\beta}$=-.25, p=.046), academic self-efficacy (${\beta}$=.19, p=.035). These two factors explained about 10% of variance in drug calculation competence. Conclusion: Based on the results, the strategies reducing the anxiety for drug dosage calculation and improving the academic self-efficacy should be developed and implemented.

• Journal of the Korean Applied Science and Technology
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• v.39 no.4
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• pp.535-541
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• 2022

The radical reaction position was calculated by varying the calculation level for ACEL and ANT, which are detected with the highest frequency and concentration in PAHs pollution sites. The results of each calculation level were compared and evaluated with the existing literature. HF, B3LYP, B3LYP-D, and MP2 were used as the method for each level used for calculation. Except for HF, the MK charge by B3LYP, B3LYP-D, and MP2 was consistent with the experimental results. It was found that the dispersion effect was negligible in the calculation of ACEL and ANT because the calculation results by the B3LYP and B3LYP-D methods were the same. In particular, it was found that the MK charge calculation result by MP2 agrees well with the product/PAH ratio obtained as a result of the experiment. Considering the calculation cost, it would be preferable to use B3LYP to predict the radical reaction site of ACEL and ANT. However, considering the product/PAH ratio, it takes more time to calculate, but it is judged that it is better to use the MP2.