• Journal of Korean Home Economics Education Association
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• v.29 no.4
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• pp.133-147
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• 2017

The purpose of this study was to investigate the perception and intake of Kimchi in middle school students in Gwangju area and analyzed the difference of Kimchi intake according to Kimchi perception level to provide basic data to help middle school students develop proper dietary behavior. The data were collected from middle school students in Gwangju area and 374 questionnaires were used for analysis. The main results of this study are as follows. First, the perception of Kimchi of middle school students was 4.10 for first grade and 3.92 for third grade, showed significant difference (p<0.001) between first grade and third grade. Second, the preference of Kimchi of middle school students by grade showed significant difference between first grade and third grade at 'Kimchi preference' (p<0.001) and 'Reasons for not eating Kimchi' (p<0.05) respectively. 81.7% in the first graders and 59.8% in the third graders, and the first graders more preferred Kimchi than the third graders. Third, the pattern of Kimchi intake of middle school students by grade showed significant difference between first grade and third grade at 'Frequency of Kimchi intake' (p<0.05) and 'Amount of Kimchi taken at one time' (p<0.05) respectively. Fourth, the education of Kimchi of middle school students by grade showed significant difference between first grade and third grade at 'My attitude toward Kimchi recommendation' (p<0.05), 'Necessity of Kimchi intake education' (p<0.05), 'Whether you think it is good food for Kimchi information' (p<0.001), 'Preferred method for the Kimchi education' (p<0.001) and 'Methods for increasing Kimchi intake' (p<0.05) respectively. Fifth, the preference of Kimchi of middle school students by the degree of Kimchi recognition showed significant difference at 'Kimchi preference' (p<0.001), 'Reasons for liking Kimchi' (p<0.05) and 'Reasons for disliking Kimchi' (p<0.05) respectively. The pattern of Kimchi intake of middle school students by the degree of Kimchi recognition showed significant difference at 'Frequency of Kimchi intake' (p<0.001) and 'Amount of Kimchi taken at one time'(p<0.05) respectively. The the education of Kimchi of middle school students by the degree of Kimchi recognition showed significant difference at 'My attitude toward Kimchi recommendation' (p<0.05), 'The experience of making Kimchi' (p<0.05), 'Necessity of Kimchi intake education' (p<0.001) and 'Whether you think it is good food for Kimchi information' (p<0.001) respectively.

• Proceedings of the KIEE Conference
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• 2001.07a
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• pp.249-251
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• 2001

This paper presents performance analysis on a low pass filter of a CT saturation detecting algorithm using difference. At the instants of beginning/end of saturation, the shapes of the secondary current are changed significantly though secondary currents are continuous. At the instants, the second-order or third-order difference of the secondary current has big values because of discontinuity of the first order difference. Thus, the third difference of the current is used to detect the beginning/end of CT saturation. An antialiasing low pass filter removes high frequency components and causes phase lag. A CT saturation detecting algorithm using difference of CT secondary currents is affected by the low pass filter. The algorithm is tested with cutoff frequencies of the filter for the two sampling rates of 64[S/C] and 32 [S/C]. The results of various test cases indicate satisfactory performance of the algorithm.

• Journal of the korean academy of Pediatric Dentistry
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• v.2 no.1
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• pp.35-46
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• 1975

The third year dental caries survey of "K" primary school children was performed in June 1975, and evaluated their transitional trends of three consecutive past years, statistically. 1,421 children (782 boys and 639 girls) 6 to 12 years of age was surveyed at the third year. The results were as follows: 1) The average df person rate was 89.97%(boy 88.19%, girl 92.42%). It showed significant increment(P<0.005) compare to 1973 and nonsignificant to 1974. 2) The average dft index was 3.82(boy 3.76, girl 3.90). It showed nonsignificant difference compare to 1973 and 1974. 3) The average DMF person rate was 66.57%(boy 63.84%, girl 69.89%). It showed significant decrement(P<0.005) compare to 1973 and 1974. 4) The average DMFT index was 2.03(boy 1.88, girl 2.20). It showed significant decrement(P<0.005) compare to 1973 and 1974. 5) The sexual difference of df and DMF person rates, female showed a little higher value than male. It showed significant difference(P<0.005). 6) The increment of df and DMF person rates, the 7 to 8 year group showed the most and the 7 to 8 year group showed the least.

• Proceedings of the KIEE Conference
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• 2002.11b
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• pp.274-276
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• 2002

This paper proposes a current differential relaying algorithm for power transformers using the third difference function of a differential current. The algorithm observes the instants when the wave-shape of the differential current is changed due to the change of the magnetization inductance. If the value of the third difference is bigger than the threshold, the output of a current differential relay is blocked for a cycle. In the cases of magnetic inrush and overexcitation, the blocking signal is maintained: however, for internal faults, reset in a cycle. The test results clearly show that the algorithm successfully distinguishes internal faults from magnetizing inrush.

• Fashion & Textile Research Journal
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• v.6 no.5
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• pp.595-604
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• 2004

This study is to investigate complaining behavior of consumers who purchase fashion products on the internet, as well as to find how the complaining behaviors are related to the consumers' characteristics. The subjects of this study are limited to the consumers who have experienced dissatisfaction when purchasing fashion products through the internet. The questionnaires were administered to male and female respondents using the internet shopping mall. The results can be summarized as follows: The factor analysis shows that consumer complaining behaviors are fitted well into four factors(direct complaining behavior, private complaining behavior, third-party complaining behavior, and no response). In the difference analysis by consumer's complaining behavior styles and gender, private complaining and third-party complaining behavior were significant statistically. In the difference analysis between consumer's complaining behavior styles and internet self-efficacy. Internet self-efficacy was significantly different according to consumer's complaining behavior styles, especially for direct complaining, third-party complaining and no response. Private complaining behavior, third-party complaining behavior and no response were negatively related to consumer retention, while direct complaining behavior was not.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.34 no.3
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• pp.365-369
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• 2008

This study analyzed the incidence of wound infection after the operation of mandibular third molar extraction in relation with antibiotic prophylaxis with the object of young and healthy patients. The study object was 1,177 mandibular third molars of 850 men of 20 to 25 years old without any specific systemic disease. Three methods of preventive antibiotic medication were selected according to the preventive antibiotic medication previously reported; three experimental groups were selected based on them, and the antibiotic used was amoxicillin($^{(R)}Kymoxin$, Yuhanyanghaeng, Seoul). The group 1 includes the patients that took the antibiotic orally before the operation(one hour earlier, 500mg) and for three days after the operation(250mg per time, three times/day), the group 2 is the ones that took the same antibiotic orally only once about one hour before the operation(500mg), and the group 3 did not take any antibiotics before and after the operation. And to compare the difficulties and the degrees of extraction during operations which can be possibly related to the wound infection after the operations, the mandibular third molars' impacted depths and extraction methods were investigated as well. To check if the wound was infected, observations with an internal of one week were performed twice after the operation, and the meaningfulness of the infection incidence was verified through Chi-square test using SPSS program(SPSS Inc., IL, USA). There was no statistically significant difference between the antibiotic medication methods and the wound infection incidence after the operation among the experimental groups. As examining the relations between the mandibular third molar operation methods and the wound infection incidence after the operation, there existed a statistically meaningful difference in the infection incidence according to the operation methods(p=0.020). And there was no statistically significant difference in the wound infection incidence according to the impacted depth of the mandibular third molar. Therefore, it is thought that there exists little necessity of prophylatic antibiotics medication when extracting the mandibular third molar of young and healthy men without any systemic disease in general; however, in case when it is expected that the possibility of infection will be high or the wound on the tissue will be severe, it is sure that the prophylactic antibiotics medication will be necessary.

• Journal of Society of Preventive Korean Medicine
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• v.7 no.1
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• pp.1-15
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• 2003

This study tried to evaluate the difference of stress degree by Sasang constitution and lifestyle for workplace labors, and suggested the preventive oriental medicine approaches in occupational health area. 479 data for research were collected through the process of oriental health examination with questionnaire in workplace, and collected data were analyzed with frequency, crosstab, and Two-Way ANOVA. The results were as follows: 1) All subjects, total 479 were men, and constitutional distributions were 39.2% of Taeumin, 32.4% of Soumin, and 28.4% of Soyangin. The distributions of stress score were 13.2% of normal group, 13.4% of high risk group, and 73.5% of potential risk group. 2) There were no statistically significant differences for stress by constitution(p=0.085). By the results of optimal scaling and homogeneity analysis, Soyangin was close to potential risk group compared to other constitution, and Soumin and Taeumin were close to high risk and normal group, respectively. 3) For the difference of stress score by Sasang constitution and lifestyle, Soumin who exercised nearly everyday had the highest stress score with interaction in Factor 4 area(p<0.05), and there was no interaction in other area. 4) For the difference of PWI score by lifestyle, there were statistically significant differences for drinking(p<0.01), smoking(p<0.01), and obesity index(p<0.01)

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.7
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• pp.4255-4259
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• 2013

Background: Soft tissue sarcomas (STS) are a heterogeneous group of tumors, and approximately 40-50% of patients with STS develop metastatic disease. The median overall survival of those patients was 12 months and their 5-year survival rate was 8%. Therefore, study on more effective treatment, especially the targeting therapies, is urgently needed. Objective: To evaluate the efficacy and safety of Endostar$^{(R)}$ combined with chemotherapy in patients with advanced STS. Methods: A retrospective case-series study was conducted in Cancer Institute of PLA, Xinqiao Hospital. A total of 71 patients suffering from advanced STS (IIB - IV) were included, of whom 49 cases treated with chemotherapy alone were defined as the control group and the rest 22 cases treated with the traditional chemotherapy combined with Endostar$^{(R)}$ were defined as the test group. The short-term therapeutic effects including objective response rate (ORR), disease control rate (DCR) and safety were evaluated in the two groups. In the follow-up, progression-free survival (PFS) and overall survival (OS) were also observed. Results: In the test and control groups, the ORR was 18.2% and 12.2%, respectively (P=0.767), and the DCR was 86.4% and 61.2%, respectively (P=0.034). The median time to progression in the test and control groups was 120 days and 70 days with significant difference (P = 0.017), while the median overall survival was 452 days and 286 days without significant difference (P=0.503). The one-year survival rate in the test group and control group was 56.2% and 35.4%, respectively, while the two-year survival rate was 30.2% and 26.5%, respectively. No significant difference in the side effects was found between the two groups. Conclusions: Endostar$^{(R)}$ combined with chemotherapy resulted in a higher DCR and longer PFS in the patients with advanced STS, and the toxicity was tolerable.

• The Journal of the Korean dental association
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• v.52 no.12
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• pp.753-761
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• 2014

Purpose: This study was performed to examine distribution of accessory mandibular canal and its characteristics in mandibular third molars. Materials and methods: A total of 251 subjects (166 males and 85 females) having mandibular third molars bilaterally were included in the study. Cone-beam computed tomographic images were reviewed for bifid or trifid accessory mandibular canal. The prevalence of accessory mandibular canal was evaluated according to gender, side and its branching type. Proximity and crosssectional position of accessory mandibular canal to mandibular third molar was analyzed. Results: Accessory mandibular canals were found in 66 (26.3%) of 251 patients and 86 (17.1%) of 502 hemi-mandibles. Gender and sides showed no statistically significant differences in prevalence. Retromolar canal (46.1%) was the most common branching type. Proximity of accessory canal to mandibular third molars showed mean distance of 2.8 mm from third molar and a statistically significant difference was found among types of accessory canal. Dental canal was the closest to tooth among branching types and closer to tooth than main canal. On cross-sectional view, accessory canal was generally located on buccal side of mandibular third molar. Conclusion: Accessory mandibular canal was common and well detected with cone-beam computed tomography. Their localization is significant in all anesthetic and surgical procedures involving mandibular third molars.

• The korean journal of orthodontics
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• v.24 no.4 s.47
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• pp.773-785
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• 1994

It has been generally believed that the impaction or eruption of mandibular third molars has significant correlations with the growth of the mandible, size of mandibular arch and size of teeth. The purpose of this study was to examine if there is any correlation between the status of eruption of mandibular third molars and the amount of mandibular crowding. The effect of missing of third moalrs to mandibular crowding was studied as well. 140 adult students of Yonsei University were selected and divided into three groups according to the status of mandibular third molars, Group 1) congenital missing group, Group 2) eruption group, and Group 3) impaction group. The tooth size, dimensions of the mandibular dental arch, and the amount of crowding were measured and compared. Results were as follows ; 1. There was no statistically significant difference in tooth size between the missing group and the eruption group(p<0.05). Impaction group showed larger total tooth material, inci- sal tooth material, and individual tooth size except central incisors compared to missing group (p<0.05). Impaction group showed larger total tooth material, incisal tooth material compared to eruption group as well(p<0.05). When individual tooth size was compared, impaction group had larger central incisors, canines, and second premolars than eruption group(p<0.05). 2. Missing group showed larger intermolar width than impaction group and it was stati- stically significant(p<0.05). 3. When compared the amount of total crowding, impaction group showed the largest am- ount of crowding, then eruption group, and missing group showed the least amount of crowding respectively(p<0.05). There was no statistically significant difference between missing stoup and eruption group in the amount of incisal crowding(p<0.05). Impaction group show- ed the largest amount of incisal crowding among all three groups(p<0.05).