• The Transactions of The Korean Institute of Electrical Engineers
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• v.66 no.5
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• pp.745-749
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• 2017

Climate change and energy security are major factors for future national energy policy. To resolve these issues, many countries are focusing on creating new growth industries and energy services such as smartgrid, renewable energy, microgrid, energy management system, and peer to peer energy trading. The financial and economic evaluation of new energy services basically requires energy savings estimation technologies. This paper presents the baseline load estimation method, which is used to calculate energy savings resulted from participating in the new energy program, using moving average model with heating degree days (HDD) and cooling degree days (CDD) adjustment. To demonstrate the improvement of baseline load estimation accuracy, the proposed method is tested. The results of case studies are presented to show the effectiveness of the proposed baseline load estimation method.

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.3
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• pp.107-113
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• 2016

Visual discomfort is a common problem in three-dimensional videos. Among the methods to overcome visual discomfort presented in current research, disparity adjustment methods provide little guidance in determining the condition for disparity control. We propose a diaprity adjustment based on the characteristics of disparity distribution on visual comfort, where the visual comfort level is used as the adjustment paramter, in parallax barrier type auto-stereoscopic 3D display. In this paper, we use the horizontal image shift method for disparity adjustment to enhance visual comfort. The speeded-up robust feature is used to estimate the disparity distribution of 3D sequences, and the required amount for disparity control is chosen based on the pre-defined characteristics of disparity distribution on visual comfort. To evaluate the performance of the proposed method, we used a 3D equipment. Subjective tests were conducted at the fixed optimal viewing distance. The results show that comfortable videos were generated based on the proposed disparity adjustment method.

• Journal of Korean Association for Spatial Structures
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• v.19 no.1
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• pp.109-116
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• 2019

In this paper, the shape adjustment algorithm of the spoked wheel cable structures with retractable membrane system is studied. The initial tension of the membrane or cable is necessary to form the structure and its value is determined by the design shape. However, due to internal and external environmental influences, its shape may be different from the initial designed shape. In the case of the cable structures covered in this study, tension adjustment is necessary to maintain the designed shape because it influences the tension of the cable depending on the state of the retractable membrane. Therefore, we proposed an adjustment algorithm of an initial shape based on the force method. The effectiveness and validity of the methodology were examined through the applicable cable structures. The results of the shape adjustment analysis of the symmetric spoked wheel cable model were reliable and accurate results were obtained.

• The Korean Journal of Applied Statistics
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• v.22 no.6
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• pp.1301-1313
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• 2009

Efficiency and sensitivity of BLS adjustment method have been studied and the method is known to provide more accurate estimate of total by using properly adjusted weights of samples. However, BLS methods provide different efficiencies according to the magnitudes of correlation coefficients and the sizes of samples in strata. In this paper we study the efficiency of the BLS adjustment according to the sample sizes and correlations in strata. For this study, 2007 monthly labor survey data is used.

• The Korean Journal of Applied Statistics
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• v.36 no.5
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• pp.457-471
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• 2023

The monthly series is an aggregation of daily values. In the absence of observable daily data, calendar effects such as trading day and holidays are estimated using a RegARIMA model. However, if the daily series were observable, these calendar effects could be estimated directly from the daily series, potentially improving the seasonal adjustment of the monthly time series. In this paper, we propose a method to improve the seasonal adjustment of monthly time series by using calendar variation estimation based on daily time series. We apply this seasonal adjustment method to three monthly time series and compare our results with those obtained using X-13ARIMA-SEATS.

• Journal of Environmental Policy
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• v.6 no.2
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• pp.27-45
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• 2007

This paper presents a method for developing the performance assessment of energy conservation and efficiency based on baseline and target adjustment approach. Energy consumption is related with output level and production structure. This paper suggests improvement for target establishment and performance assessment with regard to real output level in target year. Numerical illustrations of baseline and target adjustment method are shown different compared with the general assessment results. This study will contribute to applying the conformity assessment and Greenhouse Gas Emissions verification system.

• Journal of the Ergonomics Society of Korea
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• v.30 no.6
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• pp.757-764
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• 2011

Objective: The aim of this study was to provide a method to improve the compliance and reduce the time by reducing the workload during the model change work. Background: The enterprises are constructing the small quantity batch production system by increasing the number of model change and reducing model-changing. However, the compliance is low because the work is strenuous and high skills are needed, so the system management is facing with many difficulties. Method: After classifying the model change work according to the purposes(preparation, change and adjustment) with the target of mascara filling machine, element tasks time were measured and the motion analysis(therblig symbol) and REBA analysis were performed. The study incorporated 3 independent variables as the number of motion, REBA score and the element time. The dependent variable is the type of element work as preparation, change and adjustment. The statistical test was performed by one-way ANOVA(${\alpha}$ < 0.05). Results: For the preparation, the number of motions appeared in the order of Use(U), Transport Loaded(TL), and Position(P). The order appeared in change is Use(U), Release Load(RL), and Grasp (G). The adjustment appeared in the order of Position(P) and Use(U). The results of average motion time as the element work times divided by the number of motion appeared in the order of adjustment(1.85sec/motion), preparation(1.11sec/motion), and change(0.62sec/motion). The results of REBA showed that the average risk level of change and adjustment were medium, but 53.1% of change and 42.9% of adjustment were evaluated as high. Conclusion: Reducing the avoidance and improving the compliance of work could be expected if the job autonomy were improved by improving the working postures with high risk level. Application: It is expected to solve the problem of reducing the time of model change work in the small quantity batch production system. The future work is to carry out the improvement directions found in the results and compare the results after improvement.

• Korean Journal of Adult Nursing
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• v.14 no.4
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• pp.635-644
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• 2002

Purpose: This research was done to establish a theoretical foundation for the adjustment process of patients with hemophilia. Method: For this study, 14 patients with hemophilia participated. The data was collected through the in-depth interviews and analysed in terms of Strauss and Corbin's grounded theory methodology. Result: The core category was identified with "uncertainty". The adjustment process was classified into two stages: the 'unstable stage' before the moment they learn about the Hemophilia Foundation and the 'stable stage' since then. The two stages were further divided into four groups, namely 'the stage of isolation ', 'the stage of maintaining survival', 'the stage of pursuing hope', 'the stage of ambivalence'. The categories of these stages include a series of subcategories to describe the adjustment of patients. The quality of life for these patients has increasingly improved based on support from hemophiliac organizations. But due to the uncertainty of disease, the patients have four stages of adjustment process from the stage of isolation to that of ambivalence and might turn to feedback. Conclusion: Therefore the nursing interventions reflecting adjustment process of patients with hemophilia should be developed.

• Journal of the Korean Home Economics Association
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• v.41 no.2
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• pp.199-210
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• 2003

The purpose of this study was to investigate the effects of perceived relationships of the adolescents with their parents, peer and the teachers on their school adjustment. The data were collected from 385 male and female high school students in Seoul through the questionnaire method. The major result of the study were as follows: 1. About sixty percents of the respondents came from middle-class families who were being brought up by their parents. 2. Analysis of data revealed that degrees of relationship of the respondents with their parents and peer were higher than moderate, while the degrees of relationship with teacher was found to be moderate. 3. The adolescent' overall level of school adjustment was found to be at a moderate level. 4. The adolescents' levels of school adjustment were differed by birth order, father's occupations, family structures, economic status of the family, grade point average and religion. 5. The stepwise regression analyses yielded the results that relationship with the teacher, relationship with the peer, father's caring, birth order and economic status of family were significant factors in explaining the adolescents' school adjustment. On the base of the results of the study, the following suggestions were made in order to enhance adolescents' school adjustment: 1. Teacher education focused on guidance and counseling should be included in the teacher education and training program. 2. Parents education focused on fatherhood should be more emphasized.

• Journal of Institute of Control, Robotics and Systems
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• v.4 no.4
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• pp.448-457
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• 1998

A neural network based control algorithm with fuzzy compensation is proposed for the automated adjustment in the production of electronic end-products. The process of adjustment is to tune the variable devices in order to examine the specified performances of the products ready prior to packing. Camcorder is considered as a target product. The required test and adjustment system is developed. The adjustment system consists of a NNC(neural network controller), a sub-NNC, and an auxiliary algorithm utilizing the fuzzy logic. The neural network is trained by means of errors between the outputs of the real system and the network, as well as on the errors between the changing rate of the outputs. Control algorithm is derived to speed up the learning dynamics and to avoid the local minima at higher energy level, and is able to converge to the global minimum at lower energy level. Many unexpected problems in the application of the real system are resolved by the auxiliary algorithms. As the adjustments of multiple items are related to each other, but the significant effect of performance by any specific item is not observed. The experimental result shows that the proposed method performs very effectively and are advantageous in simple architecture, extracting easily the training data without expertise, adapting to the unstable system that the input-output properties of each products are slightly different, with a wide application to other similar adjustment processes.