• Journal of Oral Medicine and Pain
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• v.20 no.2
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• pp.399-406
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• 1995

The author studied to determine the tooth-age according to the degree of attrition. This study was performed on 247 subjects over forties. Upper and lower posterior teeth were clinically examined and transferred to a store model on which degree of attrition was measured with a magnifier respectively. The obtained results were as follows : The attrition by aging was increased in both male and female. The degree of attrition in male was higher than that in female for same age group. The coefficients of correlation and relation equations by the degree of attrition were obtained.

• Journal of the Korea Fashion and Costume Design Association
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• v.2 no.1
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• pp.97-112
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• 2000

The purpose of this study was to make basic data for the activation of saenghwal Hanbok industry through the survey on the present condition of saenghwal Hanbok works. Data were collected and analyzed from 124 works. The results were as follows: (1) Most works was small scale. Most works solo it 5,000,000 won and less per month, and was 20 pyung and less. (2) In 75 works the material used saenghwal Hanbok was cotton and hemp cloth, and in 53 worked. (3) Most works varied in design and materials mainly, preserved the traditional line, and preferred the active and practical design. (4) Saenghwal Hanbok wore it for plain clothes in the thirties and forties.

• Phonetics and Speech Sciences
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• v.5 no.2
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• pp.53-58
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• 2013

The purpose of this study is to compare the first two vowel formants of the stressed and unstressed English vowels produced by ten young males (in their twenties and thirties) and ten old males (in their forties or fifties) from the Buckeye Corpus of Conversational Speech. The results indicate that the stressed and unstressed vowels, /i/ and $/{\ae}/$ in particular, from the two groups are different in their formant frequencies. In addition, the vowel space of the unstressed vowels is somewhat smaller than that of the stressed vowels. Specifically, the range of the second formant of the unstressed vowels and that of the first formant of the unstressed front vowels were compressed. The findings from this study can be applied to the pronunciation training for the Korean learners of English vowels. We propose that teachers of English pay attention to the stress patterns of English vowels as well as their formant frequencies.

• Journal of the Korean Society of Costume
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• v.53 no.1
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• pp.77-85
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• 2003

The following results are from a research on the influences of the political parties on the fashion styles. which political power was strugg1ed with each other were one of the political Phenomena featuring Chosun Dynasty. Partisan fashion styles are mainly divided into two groups : NohRon (노론) and SohRon (소론). Nonetheless. NmIn (남인) also shows several unique traits. BukIn (북인). however, does not seem to be retaining any unique styling features. which believed to be caused by lack of political Power. The style of NohRon represents the status of a ruling party, which generally had abundant resources and the image of a conservatism. On the contrary, with SohRon's style, swiftness and reform-minded images could be found. Moreover, the NohRon's style is generally known to present, as the representing the way of noble men of Chosun Dynasty wore in the past. The reason seems to have stemmed from its status as the last ruling party in Chosun Dynasty. Thus, many people of the age mimicked the style, and it gained general acceptance in turns. Consequently, it is still deemed as the prevalent style of Chosun Dynasty.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.27 no.3
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• pp.52-58
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• 2004

This study investigated the influence of package design of female cosmetics on the purchasing preferences of view The subjects of this study were the consumers of female cosmetics from their twenties to the forties, and were 195 consumers who dropped into beauty counters to buy their cosmetics. With this study, it can be said that package design Is an effective factor on purchasing of female cosmetics. In general, most consumers prefer to practical and useful package design. But the younger consumers tend to be more influenced by luxury and expensive package design than an elderly consumers on purchasing cosmetics. And it made a little difference in purchasing preferences by academic background.

• Journal of the Korean Society of Clothing and Textiles
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• v.27 no.11
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• pp.1307-1317
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• 2003

The level of consumer knowledge has been gradually increased with the growth of living standard of consumer and the development of communication technology. The purpose of this study was to investigate the structure and measure of consumer knowledge and to find out relationship between objective knowledge and subjective knowledge. The subjects of this study were female adults from theirs twenties to theirs forties who lived in Seoul, Kyunggi or Incheon areas and Quota sampling method was used age and areas. The data were obtained from 603 questionnaires. Data were statistically analyzed using SPSS 10 and major statistical methods are mean, frequency, Pearson correlation coefficient, and Cronbach's $\alpha$ coefficient. The results are as follows: 1. Objective knowledge consisted of the product knowledge, brand knowledge, purchase knowledge and usage knowledge, and subjective knowledge consisted of experience and self-evaluation knowledge. 2. Consumer knowledge was related to the subjective knowledge and objective knowledge. But, there was relatively a low relationship between subjective knowledge and objective knowledge of apparel.

• Journal of Chest Surgery
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• v.23 no.4
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• pp.736-744
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• 1990

From Jan. 1985 to Sep. 1989, four hundred and ten patients were admitted to the department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine with a diagnosis of nonpenetrating chest trauma. The most common cause of injury were motor vehicle accidents(75.1%) with the prevalent age group being their forties. The four most common findings were rib fracture(83.4%), hemothorax(50.7%), pneumothorax(24.6%) and clavicle fracture(12.0%), Fifty piratory insufficiency and the ventilation time was correlated with 6 fators : 1) shock 2) endotracheal intubation or tracheostomy 3) hemothorax 4) clavicle fracture 5) flail chest 6) more than three combined injuries or combined head injury. Ventilatory care was also related with mortality and complications such as pneumonia sepsis and empyema thoracis(p<0.05). The most common organism of post-traumatic infection were Pseudomonas and Staphylococcus.

• Korean Journal of Child Studies
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• v.22 no.2
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• pp.195-203
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• 2001

This study examined parental perceptions and use of traditional play songs for infants by parent's age and gender. The 464 subjects living in Daejeon City provided data via questionnaires and recorded tapes. Of 13 play songs for infants, parents were really acquainted only with Jjak-jjak-kkung, Do-ri Do-ri, Gon-ji Gon-ji, and Jam-jam. However, most parents thought traditional play songs are important for the education of the whole child. Mothers and parents in their thirties and forties considered traditional play songs to be more important than did fathers and parents in their twenties. Though infants liked traditional play songs, most parents didn't use them with their infants because parents knew few traditional play songs and they had little time to play with their infants. Lack of time was a more serious problem for fathers than for mothers.

• Phonetics and Speech Sciences
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• v.4 no.4
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• pp.29-35
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• 2012

The purpose of this study was to measure the first two vowel formants of the forty male and female speakers (twenty young vs. old male speakers and twenty young vs. old female speakers) from the Buckeye Corpus of Conversational Speech and to examine the vowel formant changes across two generations (younger vs. older). The results indicated that the vowel space of the younger generation (in their thirties or less) shifted to the lower left position compared to those of the older generation (in their forties or more) in both male and female speakers. When the results were compared to those of Peterson & Barney (1952), it appears that differences can be found in the size of the vowel spaces through time.

• Journal of Korean Society for Quality Management
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• v.30 no.2
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• pp.47-59
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• 2002

The purpose of this paper is to investigate the customers' requirements for shoe products using the survey method, to analyze customers' needs, and to suggest information to make the shoe that they want. For this work, we made 38 survey items for the degree of shoe satisfaction, for foot care and shoe control, for shoe characteristics, and for shoe purchase in future. For the purchase of shoe products in future, customers in their twenties gave the highest score for shoe design among price, design, size, fashion, fitness, color, brand, so forth. However, respondents in their forties selected the degree of fitness instead of shoe design. In the question for the buying price of shoe products in future, all customers wanted shoe products between 30,000 won and 50,000 won.