• Journal of the Korean Society for Library and Information Science
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• v.46 no.2
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• pp.245-260
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• 2012

This study aims to analyze the change in the correlation between the index values and qualitative quantitative evaluation elements by applying 'the decile of total number of articles' instead of the average annual number of articles in Kor-Factor2, and to evaluate the distinction ability between registered journals and register nominee journals of the KCI. The correlation between the index values and qualitative quantitative evaluation elements was analyzed by calculating the correlation coefficient between the index values and the evaluation elements, and then the correlation was compared with that of Kor-Factor2. To evaluate the distinction ability, we carried out independent samples t-test on the mean difference between index values of register nominee journal group and registered journal group and compared the mean difference with that of Kor-Factor2, IF and journal h-index. As a result, we found that the modified index applying the decile of total number of articles was effective in improving the balance among the correlation between the index values and qualitative quantitative evaluation elements compared to Kor-Factor2, and the new index appeared to be superior to other indexes on distinction ability of the journal's registration condition in the KCI.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.536-547
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• 2020

This study analyzed the correlation between adolescents' smartphone addiction as well as depression, self-esteem, and self-regulation based on QEEG (Quantitative Electroencephalogram) analysis. The study period was from March 19 to July 12, 2019, and the subjects were 76 students at P Middle School in Gyeonggi-do (normal group 47, risk group 29) who filled out a questionnaire and were subjected to quantitative EEG. The data analysis was performed via frequency analysis, independent t-test, correlation analysis, and path analysis of the IBM SPSS Statics 21.0 program. First, smartphone addiction had a positive correlation with depression. Second, smartphone addiction showed a negative correlation with self-esteem and α wave. Third, depression showed a negative correlation with self-esteem, which did not show a significant correlation with self-regulation. Fourth, depression was higher in the risk group than the normal group. For self-esteem, the normal group scored higher than the risk group. Self-regulation showed higher significant differences with the normal group than the risk group. Fifth, for α wave and SMR, the normal group scored higher than the risk group. Sixth, α waves had a negative effect on smartphone addiction. This study is meaningful in that it applied a brain science approach using quantitative analysis for objective evaluation of smartphone addiction.

• Korean Journal of Biological Psychiatry
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• v.23 no.4
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• pp.193-198
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• 2016

Objectives Obsessive-compulsive disorder (OCD) and schizophrenia have many common clinical and neurocognitive features. However, not all of them share the same underlying mechanism. The aim of this study was to discover evidences that indicate a pathophysiological mechanism specific to OCD by comparing correlations of quantitative electroencephalography (QEEG) patterns and neurocognitive function in patients with OCD and schizophrenia. Methods Resting-state QEEG data of total 265 patients were acquired retrospectively and parameters such as absolute power, relative power and peak frequency were analyzed from the data. Stroop test and Trail Making Test results as well as demographic features were reviewed for this study. The correlation of neurocognitive functions and brain electrical activities in each group were assessed and compared by correlation analysis. Results Compared with the OCD group, the schizophrenia group performed poorly in neurocognitive tests. Mean values of QEEG parameters in patients with OCD and schizophrenia did not show significant differences. Both absolute and relative power of alpha rhythm in central and frontal regions showed significant positive correlation with Stroop test results in OCD patients. Conclusions Findings in this study shows distinctive correlations between frontal executive dysfunction and frontal alpha rhythm in the OCD patients, both of which might be a candidate for endophenotype underlying obsessive rumination.

• Korean Journal of Community Nutrition
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• v.7 no.1
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• pp.58-66
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• 2002

The purpose of the study was to develop and evaluate the reliability of a semi-quantitative food frequency questionnaire (SFFQ) intended to measure mainly nutrient intake (energy, protein, fat, calcium and iron) related to growth in pre-schoolers in Korea. Based on foods with up to 90 cumulative percent contribution of the 5 nutrients, we developed a SFFQ for 86 foods. In order to evaluate the reliability of both nutrient and food intakes, caregivers of a sample of 101 children aged 4 to 6 years completed the SFFQ repeatedly at 3 month intervals. There were small differences in the nutrient intakes assessed by the SFFQ ranging from 0.55% to 9.91%. There were no significant differences in nutrient values calculated from the repeat questionnaires, except in the case of niacin and vitamin C. The Pearson correlation coefficients of most of the nutrients ranged form 0.54 to 0.75 (mean = 0.66). When energy intake was adjusted, there was approximately a 0.2 decrease in the correlation coefficient of most nutrients, due to the high correlation of energy intake with other nutrients (r=0.7-0.9). The amount of food intake differed by 0.1 to 66.4% (mean = 17.5%), depending on the food item. Out of 86 foods, 74 foods (86%) showed less than a 30% difference in intake and 30 foods (35%) showed less than a 10% difference. Only 6 (7%) out of the 86 foods presented statistically significant differences in intake. The Spearman correlation coefficients of most food intakes assessed repeatedly by the SFFQ ranged from 0.4 to 0.7. Reproducibility of the nutrient and food intakes found in this study was better or similar to those found in cases of Korean adults. Therefore, the SFFQ developed in the present study can be a useful tool to assess the dietary intake of pre-schoolers in Korea.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.24 no.5
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• pp.470-482
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• 2021

Purpose: We investigated the relationship between sonographic measurements of fatty liver and body mass index standard deviation score (BMI-Z score), abdominal wall fat thickness (AWFT), and serum biochemical parameters in childhood obesity. Methods: Anthropometric, laboratory, and ultrasonography data were obtained from 174 children with BMI-Z score >1. After the qualitative grading of hepatosteatosis (grades 0-3), the quantitative liver-kidney echogenicity ratio (LKER) was calculated using a software tool. Groups according to sex, age (AG-I to AG-III), BMI-Z score (BMG-I to BMG-III), and hepatosteatosis degree (HS-I and HS-II) were formed. The differences and distributions of the variables were statistically analyzed and compared among the groups. Results: Serum transaminase and glucose levels showed a positive correlation with LKER, whereas the HDL level showed a negative correlation. BMI-Z score and AWFT showed a positive correlation with fasting insulin level and HOMA-IR value. LKER was significantly higher in girls than in boys (p=0.008). In the AG-I group (age 3-8.9 years), the BMI-Z score was significantly higher, whereas AWFT was significantly lower than in the other age groups (p<0.001). The cutoff point of LKER for predicting grade 2 or higher steatosis (HS-II group) was determined to be 1.83. Cardiovascular disease risk was significantly higher in the HS-II group (p=0.035). Conclusion: As a valuable quantitative measurement tool, LKER can be used for the sonographic screening of fatty liver. AWFT, on the basis of its correlation with fasting insulin level and HOMA-IR value, may be a useful sonographic parameter in the management of childhood obesity.

• Journal of Korean Physical Therapy Science
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• v.15 no.2
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• pp.1-13
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• 2008

Background: This study had been carried out with 18 ischemic stroke patients as its object for about eight months from October, 2006 to May, 2007 in order to observe the recovery of motor function and the change of important blood factors according to the different quantitative exercises. Methods: Subjects were assigned randomly either experimental group (n＝19) or the control group (n＝19), when the study began the halfway on this study dropout 20 patients, and final subjects remained experimental group's 9 patients and control group's 9 patients. Both groups received thermotherapy and functional electrical stimulation (FES), also taken different quantitative exercise therapy (experimental group 180 minutes, control group 80 minutes). Subjects were assessed for upper and lower extremities motor function Fugl－Meyer Scale; FMS), blood test (white blood count; WBC, low density lipoprotein －cholesterol; LDL-C, high density lipoprotein-cholesterol; HDL-C, Troponin) during pretest, after 2 months, after 3 months. Results: The results of this study were as follows; 1. FMS has no statistically significant difference with intergroup(p>.05). But there was a statistically significant difference with each groups (p<.05). 2. WBC has no statistically significant difference with intergroup (p>.05). But there was a statistically significant difference in control group (p<.05), without experimental group (p>.05). 3. LDL-C has no statistically significant difference with intergroup (p>.05). But there was a statistically significant difference in control group (p<.05), without experimental group (p>.05). 4. HDL-C has no statistically significant difference with intergroup (p<.05). But there was a statistically significant difference with each groups (p>.05). 5. Troponin Ⅰ has no statistically significant difference with intergroup (p>.05). Also there was no statistically significant difference with each groups (p>.05). Conclusion: These findings suggest that different quantitative exercises has no effect on FMS, LDL-C, HDL-C, WBC, Troponin Ⅰ with ischemic stroke patients. But the treatment period that there's less correlation between the recovery of motor function and the different quantitative exercise, also less correlation between the change of important blood factors and the different quantitative exercises with ischemic stroke patients.

• Journal of Society of Preventive Korean Medicine
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• v.24 no.3
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• pp.1-13
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• 2020

Objectives : The objective of this survey was to examine students' perception of the clinical performance examination (CPX) in college of traditional Korean medicine using student standardized patients. Methods : College of traditional Korean medicine students who completed the first-semester clinical practice education were selected as the subjects, and they participated in a survey asking questions about the following matters: satisfaction with CPX, self-evaluation, difficulties experienced during the CPX course, level of prior knowledge of clinical practice education, and usefulness of and intimacy with Student Standardized Patients (SSP). Results : Satisfaction with CPX was calculated to be 4.10 (5 being the perfect score), and self-evaluation of CPX was calculated to be 4.12. The subjects chose physical examination as the most difficult item relating to CPX. 80.5% responded positively to the question relating to diverse experiences in practice education, and 52.8% responded positively to the question relating to prior knowledge of diverse standardized patients. 55.6% responded positively to the question relating to performance proficiency of SSP, 63.9% responded positively to the question relating to usefulness of SSP to prepare for CPX, and 69.4% responded positively to the question relating to usefulness of SSP in evaluating CPX, and 55.6% responded positively to the questions relating to intimacy with SSP. It was confirmed that there was a strong quantitative correlation between prior knowledge of clinical practice education and usefulness of SSP, and that there was a strong quantitative correlation between performance proficiency of SSP and usefulness of SSP. It was confirmed that there was a middle-level correlation between performance proficiency of SSP and intimacy with SSP, and that there was a middle-level quantitative correlation between intimacy with SSP and usefulness of SSP. Conclusions : It was confirmed that senior students enrolled in college of traditional Korean medicine were mostly satisfied with the clinical performance examination in college of traditional Korean medicine using SSP, and that usefulness of SSP had a quantitative correlation with prior knowledge of diverse clinical practice educations, performance proficiency of SSP, and intimacy with SSP.

• The Journal of Information Systems
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• v.20 no.3
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• pp.63-79
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• 2011

Deducting the risk level of infrastructure and buildings based on past human disaster risk cases and implementing prevention measures are important activities for disaster prevention. The object of this study is to measure the confidence to proceed quantitative analysis of various disaster risk cases through text mining methodology. Indeed, by examining confidence calculation process and method, this study suggests also a basic quantitative framework. The framework to measure the confidence is composed into four stages. First step describes correlation by categorizing basic elements based on human disaster ontology. Secondly, terms and cases of Term-Document Matrix will be created and the frequency of certain cases and terms will be quantified, the correlation value will be added to the missing values. In the third stage, association rules will be created according to the basic elements of human disaster risk cases. Lastly, the confidence value of disaster risk cases will be measured through association rules. This kind of confidence value will become a key element when deciding a risk level of a new disaster risk, followed up by preventive measures. Through collection of human disaster risk cases related to road infrastructure, this study will demonstrate a case where the four steps of the quantitative framework and process had been actually used for verification.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.21 no.2
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• pp.129-139
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• 1995

To confirm the usefulness of partial least-squares(PLS) and multiple scattering correction(MSC) method for quantitation of surfactants in [quantitative methods using FT-lR, reconsitituted mixtures of LAS, MES and ELA-9 were tested. Each mixture was dissolved in 50% EtOH, dried, and applied to the KBr cell. From the IR spectra of these mixture, the variance spectrum was obtained. After repeated calibrations for the various regios of this spectrum, we found that 1245-1130cm-1 and 1070-1010cm-1 showed the strong correlation with each component of the sample mixture: all the correlation coefficients were 1.000 and quantitative errors did not exceed 0.32%. From this result, we concluded that PLS method and MSC method are very useful and can be successfully applied to Quality control.

• Journal of Integrative Natural Science
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• v.4 no.3
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• pp.210-215
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• 2011

Holographic quantitative structure-activity relationships (HQSAR) is a useful tool to correlates structures with their biological activities. HQSAR is a two dimensional (2D) QSAR methodology, which generates QSAR equations through 2D fingerprint and correlates it with biological activity. Here, we report a 2D-QSAR model for a series of fifty-one 3,4-dihydroxychalcones derivatives utilizing HQSAR methodology. We developed HQSAR model with 6 optimum numbers of components (ONC), which resulted in cross-validated correlation coefficient ($q^2$) of 0.855 with 0.283 standard error of estimate (SEE). The non-cross-validated correlation coefficient (r2) with 0.966 indicates the model is predictive enough for analysis. Developed HQSAR model was binned in to a hologram length of 257. Atomic contribution map revealed the importance of dihydroxy substitution on phenyl ring.