• 대한치과의사협회지
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• 제17권7호통권122호
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• pp.521-524
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• 1979

The Author measured the position of the mandibular foramen with oblique cephalography in 41 8-aged, and 45 12-aged Korean children. The results of the studies were as follows; 1) The distance from the posterior occlusal plane to the mandibular foramen was 1.85±1.23mm. in age 8 and 1.85±1.21mm. in age 12 to the below. 2) The meeting point of the occlusal plane and anterior of the ramus to the mandibular foramen was 16.68±1.68mm. in age 8 and 16.84±2.09mm. in age 12. 3) the angulation between the occlusal plane and the line connecting the mandibular foramen and the meeting point of anterior of the ramus with occlusal plane was 8.15±1.87˚ in age 8 and 7.11±1.89˚ in age 12 to the below. 4) % depth was 53.98 ±3.40% in age 8 and 53.81±4.05% in age 12.

• BMB Reports
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• 제50권11호
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• pp.546-553
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• 2017

Aging is a natural and gradual process in human life. It is influenced by heredity, environment, lifestyle, and disease. DNA methylation varies with age, and the ability to predict the age of donor using DNA from evidence materials at a crime scene is of considerable value in forensic investigations. Recently, many studies have reported age prediction models based on DNA methylation from various tissues and body fluids. Those models seem to be very promising because of their high prediction accuracies. In this review, the changes of age-associated DNA methylation and the age prediction models for various tissues and body fluids were examined, and then the applicability of the DNA methylation-based age prediction method to the forensic investigations was discussed. This will improve the understandings about DNA methylation markers and their potential to be used as biomarkers in the forensic field, as well as the clinical field.

• 한국주거학회논문집
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• 제6권1호
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• pp.89-101
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• 1995

This study is to analyze dwelling environmental planning in old age of middle age. For this purpose. the data were collected by using questionnaire distributed to 332. The data were analyzed by Chisquare test. The major findings of this research were as follow: 1. In housing plan of old age. they prefer new house .that is not exisiting house. independent house and ordindry housing region in the suburbs of urban. 2. It is 69.3～99 square meter what size of house is suitable for independent life of aged person for living with children. it is 102.3～132 square meter. 3. In the stage of independent or semi-independent life. they want aged couple-independent life. In the stage of dependent life. they want to be cared with children. 4. The garden(madang) is the most important space for age couple in establishing housing plan. They want to amplity life recuperation center and job providing facilities. In old age housing project. they prefer housing type with facility that combine old age house with young age house. According to increasement of dependence. the service support system required flexi-care-system.

• 가정과삶의질연구
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• 제15권1호
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• pp.161-172
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• 1997

The purpose of this study was to explore the effect of the sex, age, degree of social support on self-esteem of the old aged and to provide information for finding out ways of developing their self-esteem. The subject of this study were 504 old aged in Kwang-ju and Jun-nam. The statistics used for data analysis were frequency percentage mean standard deviation reliability ANOVA stepwise and multiple regression analysis through the SAS package program, . The major findings of this study can be summarized as follows; 1) The self-esteem of old aged was 27, 2 which was above the median 22.5 2) According to the results related to the old aged the effect were by sex, age, social support, . There were also significant interaction effects by $age^{\star}$social support $sex^{\star}\;age^{\star}$aocial support $sex^{\star}$social support $sex^{\star}$age it was shown that influencing variable on their self-esteem was sex social support $sex^{\star}$social support $sex^{\star}$age age.

• 대한물리치료과학회지
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• 제2권1호
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• pp.375-381
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• 1995

The purpose of this study was to investigate the muscle power and muscle endurance, situp and bend of back in age group and regional group. The mesurment of muscle power and muscle endurance was performed on 156 males and 160 fimales. The results of study were as follows. 1. Right grip showed significant difference by age group, but no significant differ ence by reginal group in male's case. 2. Left grip showed significant difference by age group but no significiant differ ence by regional group in male's case. 3. Back strength showed significant difference by age group and reginal group. 4. Sit-up showed significant difference by age group but no significant difference by regional group in male's case. 5. Bed of back showed significant difference by age group but no significant differ ence by regional group in male's case. 6. Jump showed significant difference by age group and reginal group.

• The International Journal of Costume Culture
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• 제9권1호
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• pp.39-51
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• 2006

The purpose of this study is to investigate the fit of ready-to-wear garment for girls at the age of puberty and to find out the respective differences by age and locality. For this study, a questionnaire survey was conducted to 547 girls in Seoul and Gyeonggi-do. As a whole. the largest parts of complaints for unfitness were height, waist circumference and, next hip circumference. According to the result of comparing the fit of ready-to-wear garment by items, the fit of clothing for girls at the age of puberty gets relatively worse with the increase of age in all items except one-piece. As for the fit by parts of ready-to-wear garment, significant differences were observed according to age in the length of sleeve, crotch and the length of upper garments. That is, girls at the age of 10${\sim}$11 were found to think that their clothes are long in the three measures.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제8권7호
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• pp.2480-2495
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• 2014

This paper describes a hierarchical method for image-based age estimation that combines age group classification and age value estimation. The proposed method uses a coarse-to-fine strategy with different appearance features to describe facial shape and texture. Considering the damage to continuity between neighboring groups caused by fixed divisions during age group classification, a dynamic grouping technique is employed to allow non-fixed groups. Based on the given group, an ordinal hyperplane ranking (OHRank) model is employed to transform age estimation into a series of binary enquiry problems that can take advantage of the intrinsic correlation and ordinal information of age. A set of experiments on FG-NET are presented and the results demonstrate the validity of our solution.

• International journal of advanced smart convergence
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• 제9권2호
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• pp.203-211
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• 2020

This study proposes a method for estimating gender and age that is robust to various external environment changes by applying deep learning-based learning. To improve the accuracy of the proposed algorithm, an improved CNN network structure and learning method are described, and the performance of the algorithm is also evaluated. In this study, in order to improve the learning method based on CNN composed of 6 layers of hidden layers, a network using GoogLeNet's inception module was constructed. As a result of the experiment, the age estimation accuracy of 5,328 images for the performance test of the age estimation method is about 85%, and the gender estimation accuracy is about 98%. It is expected that real-time age recognition will be possible beyond feature extraction of face images if studies on the construction of a larger data set, pre-processing methods, and various network structures and activation functions have been made to classify the age classes that are further subdivided according to age.

• 대한가정학회지
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• 제19권2호
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• pp.1-9
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• 1981

The phenomena of memory have been shown to come out early in life and to develop drastically for early childhood. Therefore, the purpose of this study were examine the development of memory of Korean children and also to see the memory span of Korean children. the subjects in this study were 80 children (male and female each 40 children) from age 3 to age 6. These subjects were devide into two age groups (3~4 age, 5~6 age). the stimulus materials were the numbers and the words. The numbers in this study were chosen from the number problems of WISC. The 42 words which consisted of two phonemes were selected. The number of items was 3 to 9 on the first through the last trial. altogether 14 trials, 7 trials for numbers and 7 trials for words, were given to each subject. Free recall method was sued. The following conclusions could be made. 1. The memory span of Korean early childhood increased as the age of the children increased. 2. The primacy effect was appeared when the age increased. Therefore, rehearsal was appeared as the age of the Korean early childhood increased.

• International Journal of Reliability and Applications
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• 제10권1호
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• pp.33-42
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• 2009

In most of literatures of age replacement policy, the authors consider the case that a new item starts operating at time zero and is to be replaced by new one at time T. It is, however, often to purchase used items because of the limited budget. In this paper, we consider age replacement policy of a used item whose age is $t_0$. The mathematical formulas of the expected cost rate per unit time are derived for both infinite-horizon case and finite-horizon case. For each case, we show that the optimal replacement age exists and is finite and investigate the effect of the age of the used item.