• 한방안이비인후피부과학회지
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• 제29권1호
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• pp.93-102
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• 2016

Objective : This study performed to evaluate that duration of acne scars effects on Qualitative Global Acne Scarring Grading System(QGASC) grade changing and treatment duration. Also this study performed to evaluate the relationship between dysmenorrhea and acne scars, and the effects of each treatment on treatment duration and Korean Acne Grading System(KAGS) and QGASC grade.Methods : 95 patients with acne scars were understood by medical records and case photos, and we evaluated pre and post acne scar grade based on KAGS and QGASC. We analyzed data by SPSS 22 for windows program, and figured out the relation between duration of acne and QGASC grade and treatment duration by Spearman correlation analysis, and performed Mann-Whitney U-test to figure out the relation between dysmenorrhea and QGASC grade. We performed Wilcoxon test to evaluate that treatment of acne scars effects on KAGS grade and QGASC grade, and performed Kruskal-Wallis test to figure out the difference of each treatment which effects on KAGS grade and QGASC grade, and performed Post-hoc analysis to figure out the group comparison.Results & Conclusions : QGASC grade depending on duration of acne was statistically significance. Subcision and Microneedle Therapy System(MTS) and pharmacopuncture were significantly improved acne scars. Other treatments were significantly more effective than subcision and pharmacopuncture combined treatment. Treatment duration of Subcision and MTS combined treatment was significantly most shortest than other treatment.

• 사상체질의학회지
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• 제29권1호
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• pp.40-49
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• 2017

Objectives Sleep duration and sleep quality are closely related to obesity, however there are few studies considering the Sasang constitution. This study is to investigate the relationship between sleep status and obesity according to Sasang constitution. Methods This cross-sectional research studied 2,672 participants (1,293 men and 1,379 women) using the Korean Medicine Data Center (KDC) of the KIOM. Sasang constitution was diagnosed by KS-15 questionnaire. Obesity was divided into two categories: general obesity was defined as Body Mass Index(BMI) ${\geq}25kg/m^2$, and abdominal obesity was defined as waist circumference ${\geq}90cm$ in men and ${\geq}85cm$ in women. Sleep quality was assessed using the Pittsburgh Sleep Quality Index. Results The distribution of the subjects was 56.9% for Taeumin and 43.1% for non-Taeeumin., Poor sleep quality increased both BMI and waist circumference in Taeeumin. In men Taeeumin, sleep duration was correlated with BMI, and sleep quality was correlated with waist circumference. The prevalence of obesity was significant difference according to sleeping duration in men Taeeumin, it was the highest at 6 hours of sleeping time. Conclusions Sleep duration and sleep quality was associated with obesity in Taeeumin. Especially, in men Taeeumin, adequate sleep duration was an important factor for prevention and treatment of obesity.

• 한국기계기술학회지
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• 제20권6호
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• pp.783-789
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• 2018

This paper investigates the relationship of voltage and current waveform between normal piezo injector and deterioration abnormal piezo injector. The experimental methods using Pico oscilloscope and GDS scan tool are employed to measure current and voltage waveform and fuel pressure of piezo injector. The experiment is carried out during no-load condition. A summary of the important results are as follows. 1) In case of normal injector, the fluctuation of duration time of piezo injector was linearly and regularly decreased with increasing engine speed, but the that of deterioration piezo injector was irregularly decreased with increasing engine speed. 2) In main injection, the peak value of the current waveform of abnormal injector was larger than that of normal injector, the duration time of deteriorated abnormal injector was less than that of normal injector at 800rpm and 1500rpm, but the duration time of deteriorated abnormal injector was larger than that of normal injector at 2000rpm and 3000rpm. This irregularity appears to be caused by the deterioration of the injector.

• 말소리와 음성과학
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• 제15권3호
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• pp.9-16
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• 2023

The current study investigated the influence of age of L2 acquisition (AOA) and length of residence (LOR) in the L2 setting country on the production of voicing-conditioned vowel duration and spectral qualities in English by Korean learners. The primary aim was to explore the ways in which the language-specific phonetic features are acquired by the age of onset and L2 experience. Analyses of the archived corpus data produced by 45 native speakers of Korean showed that, regardless of AOA or LOR, absolute vowel duration was used as a salient correlate of voicing contrast in English for Korean learners. The accuracy of relative vowel duration was influenced more by onset age than by L2 experience, suggesting that being exposed to English at an early age may benefit the acquisition of temporal dimension. On the other hand, the spectral characteristics of English vowels were more consistently influenced by L2 experience, indicating that immersive experience in the L2 speaking environment are likely to improve the accurate production of vowel quality. The distinct influence of the onset age and L2 experience on the specific phonetic cues in L2 vowel production provides insight into the intricate relationship between the two factors on the manifestation of L2 phonological knowledge.

• 한국자동차공학회논문집
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• 제9권6호
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• pp.40-46
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• 2001

An experimental investigation is proceeded to study on the relationship between spark ignition characteristics and the performances of an S. I. engine. The ignition parameters examined in this study are the ignition energy and discharging duration. The combustion pressure and exhaust gas are measured during the experiment. From the measured data of cylinder pressure, the heat release rate, the mass fraction burned, and the COV of IMEP are calculated. The dwell time and the injection time are varied. A single cylinder engine and a 30kW dynamometer are employed. Four different kinds of ignition systems are assembled, and one commercial ignition system is adopted. The experimental results show that the ignition energy is increased as the dwell time extended until the ignition energy is saturated. The higher ignition energy is effective in achieving the laster burning velocity and less producing HC emission. However, when the amount of ignition energy is similar, while the discharge duration becomes longer, the burning velocity is reduced but the engine operation becomes stable in terms of the COV of IMEP.

• 한국유통학회지:유통연구
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• 제10권2호
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• pp.99-120
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• 2005

이 연구에서는 기존 연구의 검토를 통해 인터넷 쇼핑몰의 서비스품질 차원으로 환경적 품직, 고객-기업간의 일반적인 상호작용, 고객-기업간의 개인화된 상호작용, 고객간의 상호작용 및 결과적 품질을 도출하였다. 먼저 인터넷 쇼핑몰 서비스품질의 각 차원이 고객관계의 질을 구성하는 만족, 신뢰, 몰입에 미치는 영향을 실증하였다. 이들의 관계를 이용기간으로 측정한 관계지속기간이 조절하는지의 여부를 검토하였다. 만족과 신뢰 및 몰입 간의 관계를 분석하였다. 또한 관계의 질을 구성하는 세 요인과 관계지속에 대한 미래의도의 관계를 실증하였다. 기존 연구들에 바탕을 두고 구성한 측정척도들로 구성된 설문지를 이용하여 대학생 및 일반 성인을 대상으로 수집한 유효설문지를 349부를 이용하여 회귀분석을 실시하였다. 환경적 품질과 만족, 개인화된 상호작용과 신뢰를 제외한 서비스 품질 차원과 관계의 질 구성요소 사이의 관계는 통계적으로 유의한 결과를 얻었다. 관계의 강도는 차원마다 다른것도 확인하였다. 이용기간의 조절효과는 일반적인 상호작용과 신뢰의 관계에서만 확인할 수 있었다. 만족은 신뢰와 몰입과, 그리고 신뢰는 몰입과 정의 상관관계를 갖는 것으로 나타났다. 신뢰와 몰입은 관계지속에 대한 미래의도에 영향을 미치는 것으로 나타났지만, 만족과 미래의도 사이에는 직접적인 관계를 확인할 수 없었다. 이상의 연구결과를 토대로 시사점과 향후 연구과제를 제시하였다.

• 한국식생활문화학회지
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• 제28권5호
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• pp.539-546
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• 2013

The aim of this study was to investigate the effect of sleep duration on dietary habits and body composition of university students. Sleep duration has recently been added to the list of risk factors for obesity. However, studies on this topic are fairly limited particularly in Korea. We studied the relationship between the duration of sleep and obesity principally based on body mass index and %body fat in university students. For this purpose, a survey was conducted on a total of 312 university students. The subjects enrolled for this study were divided into two groups: (1) those with sleep duration of <7 hours (148 students) and (2) those with sleep duration of >7 hours (164 students). Based on a self-reporting method, the participants filled up the questionnaires for more than 20 minutes. Based on the overall data obtained, we observed that most students (52.88%) skipped breakfast. This was mainly due to shortage of time (60.58%). We also observed that self-reporting dietary preferences included eating irregular meals (49.04%), overeating (19.55%), imbalanced diet (16.35%), and skipping meals (9.94%). It was found that cookies were the favorite snacks in the majority of the participants (50%). Our data reveal that the body mass index, fat mass, visceral fat, and subcutaneous fat, respectively of the shorter sleep duration group (<7 h/day) were 23.78 $kg/m^2$, 19.13 kg, 2.23 kg, and 11.15 kg. In contrast, in those of the control group (7 h/day), these values were found to be 21.84 $kg/m^2$, 13.88 kg, 1.56 kg, and 12.11 kg. We also observed that there were significant correlations of sleep duration with body mass index (p<0.05), fat mass (p<0.01), visceral fat (p<0.01), and beck depression score (p<0.01). Our data suggest that the body mass index in the shorter sleep duration group was higher than that of the control group; however, %fat, visceral fat, and subcutaneous fat in the shorter sleep duration group were found to be higher than those of the control group. The data obtained through our study suggest that short sleep duration is clearly associated with a modest increase in general and abdominal obesity particularly in university students.

• 한국수정란이식학회지
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• 제23권3호
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• pp.141-145
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• 2008

The objective of this study was to investigate the relationship between behavioral signs and duration of estrous in Hanwoo and Holstein cattle for the prediction of optical insemination. Fifty two of 58 and 71 of 89 in Hanwoo and Holstein cows or heifers showed estrous exhibition within 72 h after 2 days following $PGF_{2}\alpha$ administration, respectively. The number of mounting and standing heat were 54.2 and 57.6, 59.4 and 53.5, 42.0 and 30.8 and 16.2 and 10.7 times in Hanwoo cows, Hanwoo heifers, Holstein cows and Holstein heifers, respectively. Duration of mounting were no significantly difference for Hanwoo cows ($21.2\pm11.3$), Hanwoo heifers ($19.9\pm11.4$), Holstein cows ($8.7\pm4.4$) and Holstein heifers ($16.9\pm8.0$). Duration of standing heat were significantly (p<0.05) shorter for Holstein cows ($5.4\pm3.4$) than for Hanwoo cows ($17.1\pm9.6$), Hanwoo heifers ($16.5\pm6.3$) and Holstein heifers ($15.0\pm7.2$). Time until mounting after injection of $PGF_{2}\alpha$ were significantly (p<0.05) longer for Holstein cows ($56.3\pm11.45$) than for Hanwoo cows ($42.71\pm10.44$), Hanwoo heifers ($36.6\pm8.21$) and Holstein heifers ($40.70\pm6.15$). Time until standing heat after injection of $PGF_{2}\alpha$ were significantly (p<0.05) longer for Holstein cows ($61.6\pm8.92$) than for Hanwoo cows ($46.2\pm11.49$), Hanwoo heifers ($42.7\pm6.06$) and Holstein heifers ($44.1\pm6.72$). In the results of this study, duration of standing heat was the shortest in Holstein cows ($5.4\pm3.4$). The estimation of estrous with Holstein cows has more difficulty because to significantly shorter duration of standing heat than for Hanwoo cows, Hanwoo heifers and Holstein heifers. The standing heat can be a good predictor for time of ovulation but it is concluded that mounting behavior could be the best predictor for time of ovulation.

• 대한한방소아과학회지
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• 제18권2호
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• pp.1-9
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• 2004

Objectives: The objective of this study is to assess the clinical effect of Gagamjeonsibaekchul-san on child diarrhea. Methods: This clinical study was carried out with 42 cases(31male, 11female) of children aged 0 to 14 years old who visited the Department of Pediatrics, Dongguk University Bundang Oriental Hospital and were diagnosed as the diarrhea. Assessments were made with reference to sex, age, the duration of symptoms and physical history. To assess the impact of Gagamjeonsibaekchul-san, the complicated signs, the duration of treatment, the correlation between the use of Gagamjeonsibaekchul- san, san and the duration of symptom were examined before and after the treatment. Results: There were 31 males and 11 females in the incidence by sex. It showed that males were more than females. The most numerous age group was 0-2(19) followed by 3-7 (11) and 9-12 (12). According to the duration of symptom, 12 children have symptom for 0-7 days, 10 for 8-14 days, 11 for 15-20 days, 4 for 22-28 days and 5 over 28 days. With regard to the physical history of the sample, 5 children had atopic dermatitis, 3 children had enteritis, 3 children had rhinitis, 2 children had tonsillitis, 1 child had otitis media, 1 child had asthma and 1 child had pneumonia. The children also had the complicated signs: 22 children had anorexia, 17 children had abdominal pain, 13 children had vomiting and 8 children had nausea in digestive organ. In addition 11 children had dizziness, 7 children had general weakness, 1 child had enuresis and 1 child had sweat in general symptoms. For the duration of the treatment, 14 children were treated for 7 days, 13 for 8-10 days, 8 for 11-14 days, 3 for 15-21 days, 2 for 22-28 days and 2 for 29-40 days. No distinct relationship between the use of Gagamjeonsibaekchul-san and the duration of the symptom was found. Conclusion: Gagamjeonsibaekchul-san is effective in the treatment of intestine mucous membrane and improves the function of digestive system. It is also an effective short-term treatment for child diarrhea.

• 대한한방소아과학회지
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• 제18권2호
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• pp.11-11
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• 2004

Objectives: The objective of this study is to assess the clinical effect of Gagamjeonsibaekchulsan on child diarrhea. Methods: This clinical study was carried out with 42 cases(31male, 11female) of children aged 0 to 14 years old who visited the Department of Pediatrics, Dongguk University Bundang Oriental Hospital and were diagnosed as the diarrhea. Assessments were made with reference to sex, age, the duration of symptoms and physical history. To assess the impact of Gagamjeonsibaekchulsan, the complicated signs, the duration of treatment, the correlation between the use of Gagamjeonsibaekchul- san and the duration of symptom were examined before and after the treatment. Results: There were 31 males and 11 females in the incidence by sex. It showed that males were more than females. The most numerous age group was 0-2(19) followed by 3-7 (11) and 9-12 (12). According to the duration of symptom, 12 children have symptom for 0-7 days, 10 for 8-14 days, 11 for 15-20 days, 4 for 22-28 days and 5 over 28 days. With regard to the physical history of the sample, 5 children had atopic dermatitis, 3 children had enteritis, 3 children had rhinitis, 2 children had tonsillitis, 1 child had otitis media, 1 child had asthma and 1 child had pneumonia. The children also had the complicated signs: 22 children had anorexia, 17 children had abdominal pain, 13 children had vomiting and 8 children had nausea in digestive organ. In addition 11 children had dizziness, 7 children had general weakness, 1 child had enuresis and 1 child had sweat in general symptoms. For the duration of the treatment, 14 children were treated for 7 days, 13 for 8-10 days, 8 for 11-14 days, 3 for 15-21 days, 2 for 22-28 days and 2 for 29-40 days. No distinct relationship between the use of Gagamjeonsibaekchul-san and the duration of the symptom was found. Conclusion: Gagamjeonsibaeichul-san is effective in the treatment of intestine mucous membrane and improves the function of digestive system. It is also an effective short-term treatment for child diarrhea.