• Communications for Statistical Applications and Methods
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• v.25 no.6
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• pp.659-671
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• 2018

In this study, we consider the extension of the heterogeneous autoregressive (HAR) model for realized volatility by incorporating a neural network (NN) structure. Since HAR is a linear model, we expect that adding a neural network term would explain the delicate nonlinearity of the realized volatility. Three neural network-based HAR models, namely HAR-NN, $HAR({\infty})-NN$, and HAR-AR(22)-NN are considered with performance measured by evaluating out-of-sample forecasting errors. The results of the study show that HAR-NN provides a slightly wider interval than traditional HAR as well as shows more peaks and valleys on the turning points. It implies that the HAR-NN model can capture sharper changes due to higher volatility than the traditional HAR model. The HAR-NN model for prediction interval is therefore recommended to account for higher volatility in the stock market. An empirical analysis on the multinational realized volatility of stock indexes shows that the HAR-NN that adds daily, weekly, and monthly volatility averages to the neural network model exhibits the best performance.

• The Korean Journal of Applied Statistics
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• v.8 no.1
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• pp.51-60
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• 1995

Given an $n \times p$ data matrix, if we add the $p_s$ variables somewhat different nature than the p variables to this matrix, we have a new $n \times (p+p_s)$ data matrix. Because of these $p_s$ variables, the traditional principal component analysis can't provide its efficient results. In this study, to improve this problem we review the supplementary principal component analysis putting $p_s$ variables to supplementary variable. This technique is based on the algebraic and geometric aspects of the traditional principal component analysis. So we provide a type of statistical data analysis for the records of eight teams and fourteen fields of the 1982-1992 Korean Pro Baseball Data based on the supplementary principal component analysis and the traditional principal component analysis. And we compare the their results.

• Nutrition Research and Practice
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• v.3 no.2
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• pp.162-166
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• 2009

The objectives of this study were to identify the dietary patterns associated with hypertension among Korean males. Data from the 2001 Korean National Health and Nutrition Survey of 1,869 men aged 20-65 years were used for the analysis. As an initial analysis, a factor analysis was applied to identify major dietary patterns among the subjects. Then logistic regression analysis was conducted to identify the pattern related with hypertension. As a result of the initial analysis, three major dietary patterns were identified. Dietary pattern 1 (traditional) was heavily loaded with vegetables, fish and cereal. Dietary pattern 2 (Western) was loaded with fast foods, bread, meats and dairy products. Dietary pattern 3 (Drinker) was loaded with mostly pork, beer and soju (Korean liquor). From the second stage of the analysis, there was a tendency of positive association between traditional patterns and hypertension risks. However, the tendency did not meet statistical significance level (p<0.05). In summary, unlikely findings from European and American studies, vegetables rich traditional dietary patterns did not show any protective effect on hypertension in Korean males. The Korean dietary practice, which is consuming salted vegetables instead of fresh vegetables, might have played a role in these findings. However, the full explanation of the findings remained to be answered with further investigation since none of the dietary patterns identified showed any statistical significance.

• The Journal of the Society of Korean Medicine Diagnostics
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• v.19 no.2
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• pp.125-132
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• 2015

Objective This study investigated the effect of Korean Traditional medicine treatment with Acupuncture, Cupping, Physical Therapy and Ganghwalijetong-yeum(Qianghuochutong-yin) on Knee joint Osteoarthritis patients. Methods 5 Knee joint Osteoarthritis patients were treated with Ganghwalijetong-yeum(Qianghuochutong-yin), acupunture, cupping, physical therapy and exercise for Knee joint Osteoarthritis. K-WOMAC(Western Ontario and McMasters Universitis) Index, VAS(Visual Analogue Scale) were checked to evaluate the effectiveness of the treatment. Results K-WOMAC of patients treated with Ganghwalijetong-yeum(Qianghuochutong-yin) is improved from $67.00{\pm}24.41$ to $44.80{\pm}21.18$ and there was statistical significance(p<0.05). VAS of patients treated with Ganghwalijetong-yeum(Qianghuochutong-yin) is also improved from $4.20{\pm}1.79$ to $2.30{\pm}1.10$ but there was no statistical significance(p>0.05). Conclusions According to the study, Korean Traditional complex therapy with Ganghwalijetong-yeum(Qianghuochutong-yin) might improve Knee joint Osteoarthritis.

• Journal of Information Management
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• v.40 no.4
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• pp.93-108
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• 2009

In order to achieve the growth of traditional Chinese medicine, the chinese government has annually released "China Statistical Yearbook of Chinese Medicine" to the world since "State Administration of Traditional Chinese Medicine of the People's Republic of China" established in 1988. It is believed that the chinese government intends to secure the early dominance of the global medical market by systematic management of its own medicine infrastructures. Although the statistics of "China Statistical Yearbook of Chinese Medicine" weren't systematically organized at the beginning, it has becoming richer, more systematic, and more standardized in the data construction and system as time has passed. Furthermore, we can take a look at China's effort to take the initiative of oriental medicine by expanding investment in several core areas - medicine resources, operation of medical instruments, service, medicine education, medicine science research, and working expenses. This article will show how china has been trying to develop the chinese medicine, focusing on two parts. One is specific analysis of the book "China Statistical Yearbook of Chinese Medicine". It is divided into analysis of its construction system, the degree of data construction, and its statistical system. The other is analysis of annual changes in areas of medicine resources, operation of medical instruments, service, medicine education, medicine science research, and working expenses.

• Journal of the Korean Dietetic Association
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• v.26 no.2
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• pp.101-115
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• 2020

The purpose of this study was to increase the utilization of traditional snacks in the Daejeon, Chungnam and Sejong regions by investigating the awareness of traditional snacks by parents and teachers of Children's foodservice facilities. The survey method was a self-monitored survey, and 576 people (298 parents, 278 teachers) were used for statistical analyses. 66.4% of parents believed that the snacks provided at facilities are nutritious, and that traditional snacks are rich in nutrition but difficult to cook (66.1%). Further, 77% of parents preferred traditional snacks, and 92% thought that traditional snacks should be passed on to future generations and continuously developed. Increasing the number of stores selling traditional snacks (41%) and a generalized awareness of traditional snacks (34%) are needed to expand the use consumption of traditional snacks. For teachers of Children's foodservice facilities, 92.8% said that the number of snacks provided per day was twice, and snacks were made and served more than twice a week (77.7%). The reasons for not making these traditional snacksit more often were the long cooking time (47.1%) and lack of labor (20.5%). There were no differences in the perceptions of traditional snacks among the types of children's foodservice facilities, but the private and public facilities showed a higher usage demand than the family type foodservice facilities for of traditional snack-focused food education programs. In order to increase the utilization of traditional snacks, it is necessary to create programs according to the facility types and to develop traditional snacks to meet the needs of consumers. The results of this study are expected to be used as basic data for the development of instructions and programs for increasing the consumption of traditional snacks at children's foodservice facilities.

• Journal of the Korean Society of Radiology
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• v.16 no.5
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• pp.505-512
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• 2022

In this study, a 3D printed assistive device was applied to X-ray examinations to diagnose human diseases. Based on the results of evaluating the device, statistical and regression analyses were conducted to evaluate its clinical utility and purchase intention, respectively. In the experiment, 90 radiologists performed X-ray examinations on patients who agreed with the use of the assistive device in oblique view X-rays of the lumbar spine, and then statistical analyses were undertaken with a traditional aid and factor analysis. The non-standardized coefficient values of the multiple regression analysis performed by setting the purchase intention of the 3D printed device as the dependent variable and the 3D printed device and traditional aid calculated by factor analysis as independent variables were 0.893 (p<0.001) and 0.269 (p<0.001), indicating statistically significant results. The results show that the 3D printed assistive device proposed in this study has higher clinical utility than traditional aids used in oblique view X-rays of the lumbar spine.

• Journal of Oriental Neuropsychiatry
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• v.28 no.4
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• pp.303-318
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• 2017

Objectives: To establish a base for further research by reviewing studies on traditional Chinese medicine treatment for Tourette Syndrome. This is the purpose of this study. Methods: Clinical studies involving the effects of traditional Chinese medicine treatment for Tourette Syndrome, published January 2010~June 2017, were obtained from CNKI, Pubmed. Selected Studies were evaluated by the Jadad Scale. Results: Among a total of 252 articles, 39 articles that meet the criteria were selected. 'Diagnostic and Statistical Manual for Mental Disorders, 4th edition (DSM-IV)' was most frequently used as diagnosis criteria. 'Yale Global Tic Severity Scale (YGTSS)' was primarily used for outcome measurements. Most of the studies showed effective results of traditional Chinese medicine therapy. However, the quality of a selected clinical studies was low. Conclusions: Despite several limitations, various studies to prove limited yet effective traditional Chinese medicine treatment on Tourette Syndrome provides much significance. Subsequent studies conducted by the complementary systematic review and well-designed clinical trials using the methodological quality will be needed to more firmly validate the effect of traditional Chinese medicine therapy.

• The Korean Journal of Community Living Science
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• v.14 no.2
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• pp.93-106
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• 2003

The main purpose of this research was to study and analyze the actual utilization of traditional knowledge resources and to search for methods to activate local communities through utilization of traditional knowledge resources best suited for us. For this study, data listed on the internal web sites during August 2002 to October 2002 were searched and analyzed. In terms of statistical analysis, frequency, percentage, and x$^2$-test were operated using the SPSS 10.0 program. The major results of this study are as follows: 1) Traditional knowledge resources utilized throughout the nation totaled to 8,906 cases. These utilized resources composed of 48.0% of tangible resources, 32.3% of environmental resources, and 19.8% of intangible resources and such utilized resources were in order of life-skill, scenery, ruins and relics, community activity, exhibition, and folklores. 2) Tourism, merchandising, and festival were the major types of utilization of traditional knowledge resources, while education was the relatively minor portion in utilization type. 3) Compound linking of traditional knowledge resources, utilization type, and utilizing body showed links such as life skill-merchandising-civilian, ruins and relics-tourism-government, folklore-festival-civilian, scenery-tourism-government, and exhibition-education-civilian.

• Journal of Distribution Science
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• v.10 no.11
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• pp.55-60
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• 2012

Purpose - This study aims to suggest policy directions for small retail markets in Korea by statistical analysis, which would help small retailers who are facing various difficulties. Research design, data, methodology - This study diagnoses the problems faced by small retail industries in Korea based on government statistics. In addition, this study identifies three areas for successful collaboration between the SSMs and traditional markets-information distribution, products, and fair trade. Results - This study makes three recommendations-information distribution, products, and fair trade. This includes activation of the existing mutual collaboration efforts, channels, CSR report writing and publicity, ethical management cooperation seminars, contract systems of no return, establishment of staff outsourcing standards, and support for suppliers' organizations. Conclusions - Our suggestions for a collaborative system (based on the three suggestions) show that collaboration rather than confrontation between large and small markets can lead to a sales increase of 2,258.2 billion Won, which is equivalent to the sales loss in 11 traditional markets in one year in Busan.