• Restorative Dentistry and Endodontics
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• v.6 no.1
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• pp.63-70
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• 1980

This study was to determine the incidence of pulp stone in each tooth by means of analyzing 375 orthopantomograph taken from 375 patients (252 male), 125 female). The pictures were grouped by age, 20s, 30s, 40s, 50s, and sex. The results were as follows 1. In the group of 20s, male showed the highest incidence in the first molar (40~50%) and the second highest was in the 2nd molar about 35%~50%. In the female group, the first molar and the second molar showed 25%~40%. 2. In the group of 30s, the highest value was found on the first molar and the next was the 2nd molar which appeared 30%~40% in male. In the female, the first molar was 55%~70% and the 2nd molar 30%~50% 3. In the group of 40s, the first molar represented highest value about 45%~60% and the 2nd molar was 40~60% in the male. Female group also showed in the first molar 30%~50% and the second molar 25~30%. 4. In the group of 50s, the highest incidence was 40%~60% on the first molar and next was 35%~50% on the second molar in male, in femalegroup showed 30%~50% on the first molar and 25%~50% on the second molar. 5. The incidence in upper was higher than that of lower. 6. Comparison between right and left showed right was slightly higher than left side.

• Journal of the Korean Society of Clothing and Textiles
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• v.35 no.2
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• pp.125-135
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• 2011

This study compares the expected values of appearance management for the suit buying behavior of men in two age groups: (20s-30s and 40s-50s) to investigate the effect of male consumers' expected values in regards to appearance management on the purchase behavior of men's suits between two generations. A survey was carried out with male consumers between the ages of 20 and 50; a total of 135 responses were analyzed by descriptive analysis, factor analysis, a reliability test, an independent samples t-test, MANOVA, ANOVA, and regression analysis. The results of this study were as follows: 1) From a result of the factor analysis on male consumers' expected value of appearance management and the information sources and purchase evaluative criteria for buying men's suits, each of three variance assessments clearly showed factorial structures. 2) There were significant differences between those in their 20s-30s and those in their 40s-50s in terms of male consumers' expected values of appearance management, their information sources, and their purchase evaluative criteria when buying men's suits. 3) As a result of looking at the differences in the effects of expected values of appearance management on men's suit buying behavior according to age (generation), the younger generation in this study showed that men's suit purchasing tendency was affected by the managing appearance factor for internal reasons such as enjoyment and self-satisfaction. On the other hand, the assessment of the older generation revealed that appearance management for external reasons such as showing social power, good human relationships, and conformity influenced their suit purchase behaviors.

• Journal of Oral Medicine and Pain
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• v.8 no.1
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• pp.127-142
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• 1983

This thesis was to investigate sex defferencd by employing the methodes of Bernadskij's and it's modification by means of the evaluation of pH of dentin in 162 extracted teeth. The obtained were as follows: 1. In 72% of all experinments, pH of human dentin substance was higher in female than in male. Mean pH was 13.175±0.031 in male and 13.245±0.030 in female. 2. After comparative studies on each pH in anatomical region of tooth arrangement, the sex difference of pH was most obviously showed in molars. 3. In pH change according to ages, the 30's was the highest in male and the 20's in female, also pH showed decresing tendency by the increasing of age in both male and female. 4. There was no pH difference in anatomical regions of tooth arrangment. 5. Mean pH was 13.282±0.013 in under 50 years of age and 13.282±0.022 over 50. It proved that pH was higher in under 50 years of age than in over 50.

• Journal of Fashion Business
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• v.25 no.4
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• pp.36-60
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• 2021

This study aimed to provide basic data for establishing a sizing system for menswear by investigating body size changes and body shapes in adult men in their 30s to 50s. Data on 52 different upper body categories collected from 4,314 people during the 5-7th Size Korea surveys were analyzed. The waist height, hip height, torso and arm lengths, and torso and upper limb circumferences increased while the arm joint sizes decreased. According to factor analysis, factors 1 and 2 referred to 'the horizontal size of the upper body and limbs' and the 'torso height and upper limb length', respectively, while factors 3 and 4 represented 'shoulder size' and 'upper body length' respectively. In clustering analysis, types 1 and 2 were 'short and fat' and 'tall and thin,' respectively, while types 3 and 4 represented 'tallest and chubby' and 'shortest and small' respectively. Torso length increased in the 30 to 40s in type 1 while torso circumference increased in the 30s and late 40s in type 2. In type 3, shoulders got bigger in the 30s. In type 4, torso circumference increased in the early 30s, and torso length increased in the late 40s. 'Thin' was a typical body shape in the early 30s. Among early 40s men, distribution evolved from 'small' to 'thin.' In the late 40s, while the percentage of 'small' decreased, the ratio of 'obese' increased. In the 50s, 'small' was the most common.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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• v.16 no.1
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• pp.130-140
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• 2003

Objectives : Lately the oriental medical treatment of Bell's palsy is various. In various treatments. this study reports the effect of our clinical treatment using aqua-acupuncture with hominis placenta and electroacupuncture treatment for Bell's palsy, The other purpose of this study is to compare the outcome of inpatient group with that of outpatient group. Materials and Methods : From March 1, 2003 to June 30, 2003, we observe 25 patients who visited to the department of oriental medical surgery, ophthalmology & otolaryngology, in oriental medicine hospital Sang-ji university with Bell's palsy. limited to patients who receive treatment more than 5th times and 4 weeks poured aqua-acupunture with homonis placenta both inpatient group and outpatient group, Inpatient group used electroacupunture treatment after 1 week after onset and outpatient group used electroacupunture treatment after 4 weeks after onset. Results and Conclusions : 40$\%$ were male and 60$\%$ female. Of 25 cases. 30's and 50's were 24$\%$ respectively, 40's, 60's and over 70 were 16$\%$ respectively, 20's were 4$\%$. 50$\%$ of male and 60$\%$ of female had the affected side at left side and right occured at 50$\%$ of male and 40$\%$ of female. The most common cause of Bell's palsy was nonspecific 36$\%$, followed by labor 28$\%$, stress 20$\%$, In 48$\%$ of all cases, 2~3 days were spent before a patient visited the hospital after onset, followed by 4~7 days (24$\%$), 44$\%$ were treated 11~20 times followed by those who received 21~30 times (28$\%$). The results of treatment with aqua-acupunture wth hominis placenta and electroacupunture treatment showed that 21 of 25(84$\%$) patients achived fair or more recovery. the overall therapeutic rate of inpatient group was 90.9$\%$, which was higher than that of outpatient group(78.6$\%$).

• Korean journal of applied entomology
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• v.30 no.2
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• pp.106-110
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• 1991

The mode of inheritance of resistance to fenvalerate in the diamondback moth (Plutella xylostella L.) was studied using insecticide susceptibility and mixed function oxidase tests. Tehre were no differences in the concentration-mortality relationships between $F_1$ progenies $(S_{female}\timesR_{male},\;R_{female}\timesS_{male})$ obtained from reciprocal crosses with the susceptible and fenvalerate-selected strains(R), indicating the absence of sex-linked inheritance. Degree of dominance of the $F_1$ progenies $(S_{female}\timesR_{male},\;R_{female}\timesS_{male})$ were -0.50 and -0.46, respectively, in the insecticide susceptibility test and -0.85 and -0.81, respectively, in the mixed function oxidase test. These results suggest that inheritance of fenvalerate resistance is controlled by and incompletely recessive autosomal gene.

• Korean Journal of Community Nutrition
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• v.14 no.5
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• pp.495-508
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• 2009

The purpose of this study was to evaluate the eating behaviors and dietary quality of various aged adults. This study conducted through questionnaire and dietary survey by 24-hr recall to 850 adults residing in Samcheok. Subjects were divided into four groups according to the age in male and female, which included 20~29 yrs group (male n = 94, female n = 66), 30~49 yrs group (male n = 201, female n = 216), 50~64 yrs group (male n = 88, female n = 96), and $\geq65$ yrs group (n = 46, female n = 43). In male, 20~29 yrs group had a larger proportion of subjects who skipped breakfast, lunch and dinner compared to other groups (p < 0.001, p < 0.05, p < 0.01). The daily food and energy intakes in $\geq50$ yrs group were significantly lower than those of < 50 yrs. Protein and fat intakes of 20~29 yrs group were significantly higher than those of the other groups. But ND (Nutrient Density) of minerals as like calcium, iron and plant iron in 20~29 yrs group were significantly lower than those of other groups. The KDDS (Korean's Dietary Diversity Score) of 20~29 yrs group, 30~49 yrs group, 50~64 yrs group and $\geq65$ yrs group in male were 4.1, 3.8, 3.7 and 3.5 respectively and there was significant difference (p < 0.001). In female, skipping breakfast and dinner were significantly higher in 20~29 yrs group than in other groups (p < 0.001, p < 0.001). And the use of nutrient supplementation was higher in 30~49 yrs group than that of other groups (p < 0.05). The daily energy intakes was higher in 20~49 yrs group than that of $\geq65$ yrs group. The ND (Nutrient Density) of animal protein, vitamins A and $B_1$ in 20~29 yrs group were significantly lower than those of other groups. The KDDS of 20~29 yrs group, 30~49 yrs group, 50~64 yrs group and $\geq65$ yrs group in female were 4.0, 3.9, 3.9 and 3.6 respectively and $\geq65$ yrs group was significant lower than other groups. According to these results, $\geq65$ yrs and 20~29 yrs group had more dietary habit problems and poor nutrition status than 30~64 yrs group. The results of this study revealed that nutritional management and education for adequate meals should be emphasized in adults and elderly.

• Korean Journal of Human Ecology
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• v.14 no.5
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• pp.847-858
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• 2005

The purpose of this study was to compare the differences in recognition of sexy body parts and apparel designs by age and to discover the correlations between sexy body parts and apparel designs. Data were collected through a survey of 265 males and 303 females. Analyses included t-tests, f-tests, and Pearson's correlations. The results were as followings; 1. The 20's-30's age group found female body parts were sexier than 40's-50's did. 20's-30's believed the male body was sexier than 40's-50's did. 2. The age groups found men's clothing designs were different by different age groups. Also, differences in female clothing designs were recognized by different age groups. 3. The 40's-50's age group recognized see-through sexier than 20's-30s did. Differences in sexy color recognition by age were also found. 4. There were correlations between most of sexy body parts and designs which emphasized the body parts. The results of this study show the differences in recognition and correlation by age. The results may be applied to developing sexy designs for different targeted age groups.

• Journal of Families and Better Life
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• v.20 no.6
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• pp.197-208
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• 2002

The purpose of this study was to investigate the economic lives of single households with the age of 30 through less than 50. The economic life was examined in three aspects; income, assets, and consumption expenditures and patterns. One hundred sixty single households were surveyed, with questionnaires for 15days from April 1 to April 15 of 2002, and analyzed with descriptive statistics. The results were as follows: about 30.8% of total single households in the sample were in the income group of 1,500,000 thought less than 2,000,000 won. The size of income for the 30's was less than that for the 40's. Compared with male single households, female single households were more in both low and high levels of income. The saving rate tended more or less to be low. The more the age, the higher the saving rate. As for debt, the 40's single households, male single households, high school single households (compared to the 30's single households, female single households, university and graduate single households, respectively) were relatively higher. In general, the single households tended to have debts due to preparation for housing, credit over use. The assets tended to be managed by themselves. The economic preparation for the old life was done by banking system rather than insurance. The average monthly living costs was higher in the age of the 40's single than the age of the 30's single. The living costs of the female single households was higher or lower than those of the male single households. As for consumption patterns, there was the most in the expenditure allocation for food away from home, then for culture entertainmentㆍsocial life, and for clothing and shoes. As for the convenience of the consumption life in overall, there were more responses in moderation and inconvenience than in convenience.

• Journal of the Korean Academy of Clinical Electrophysiology
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• v.2 no.3
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• pp.13-24
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• 2004

The purpose of this study is to reveal the effect of electrical stimulation of body composition in obese person. Subjects were 30s to 40s aged healthy workers(2004. 3. 8~4. 17) in the S general Hospital in Suwon and they were brought to manage obesity. Subjects were divided into control group(Female<0.85, Male<0.90) and study group(Female>0.85, Male>0.90) by WHR(waist-hip ratio) that is measured by Automatic body composition analyzer(InBody 3.0). And we divided the study group with randomized methods into group A(n=8) and group B(n=8). Then we compared and analyzed the change of muscle mass, body fat, abdominal girth, WHR, BMI(body mass index) after application of electrical stimulation, three times a week, for 30 minutes in each session with 50 Hz of pulse frequency, $20\;{\mu}s$ or $250\;{\mu}s$ of pulse duration. There was statistically meaningful decrement of body fat(p<0.05) and abdominal girth(p<0.05) but not of body weight, muscle mass, WHR and BMI in the control group after application of electrical stimulation with 50 Hz, $20\;{\mu}s$. There were meaningful change of abdominal girth(p<0.05), WHR(p<0.05) and BMI(p<0.05), but not of body weight, muscle mass and body fat after application of electrical stimulation with 50 Hz, $20\;{\mu}s$ in group A. We applied electrical stimulation with 50 Hz, $250\;{\mu}s$ in group B, then there were meaningful change of body weight(p<0.05), body fat(p<0.01), abdominal girth(p<0.01), WHR(p<0.05) and BMI(p<0.01) but not of muscle mass only. Consequently, the pulse duration is the main parameter of electrical stimulation that affect the body composition of obese person in this study and if we combined the diet control to reduce blood components we could have better result. So it would be more effective to manage localized obesity(in abdomen, thigh, upper arm, etc.) if you apply electrical stimulation considering the pulse duration.