• 기본간호학회지
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• 제10권3호
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• pp.283-291
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• 2003

Purpose: This study was conducted to identify the relationship between climacteric symptoms and sexual satisfaction in middle-aged women. Method: Self-selection was used to recruit, for the study, 272 middle-aged women between 40 and 59 years of age from 2 metropolitan areas and 2 provinces in Korea. The questionnaire included information on demographic characteristics, climacteric symptoms and sexual satisfaction. Result: The results are as follows: 1. The mean/item climacteric symptom score was 1.91 and the mean sexual satisfaction score was 38.19.2. Climacteric symptoms were significantly influenced by age, education, economic status, frequency of abortions and menopausal status. Sexual satisfaction was influenced significantly by age, education, economic status and menopausal status. 3. There was a significant negative correlation between climacteric symptoms and sexual satisfaction (r=-.24, p =.0002). Conclusion: Sexuality should be considered when developing nursing strategies for middle-aged women, especially when dealing with climacteric symptoms.

• 벤처창업연구
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• 제1권1호
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• pp.105-125
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• 2006

This paper relates recent empirical research on the growth. Smaller and younger firms have been growing more quickly than larger and older firms, thus, generating proportionately more new jobs. It is not difficult to understand why small and medium firms receive so much attention. Because SMEs provide about 80 percent of private sector employment so SMEs performance is an important economic and social factor. Despite this, they are subject to higher risk and mobility than those at the large firms. This paper is analyzes the relationship between firm growth measured as growth in employment, sales and production and firms age, size and R&D investment. The growth and its relationship with the determinants is linked to industrial policy in Korea. Empirical results are based on an unbalanced panel data covering period 1999-2002. Results show significant relationship between growth, size and age of firm.

• 열처리공학회지
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• 제24권4호
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• pp.193-198
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• 2011

Effect of CaO addition on age hardening response has been studied by using optical microscopy, scanning electron microscopy and differential thermal analysis in AZ91 and CaO-containing ECO-AZ91 alloys. After solution treatment, the ${\beta}$($Mg_{17}Al_{12}$) phase formed during solidification mostly disappeared in the microstructure in the AZ91 alloy, whereas numerous ${\beta}$ precipitates containing Ca were still observed in the ECO-AZ91 alloy due to its enhanced thermal stability. The ECO-AZ91 alloy showed the delayed peak aging time and higher peak hardness compared with those of the AZ91 alloy. The activation energies for ${\beta}$ precipitation calculated by means of Kissinger method increased from 71.4 to 85.6 kJ/mole by the addition of CaO, which implies that CaO plays a role in reducing ${\beta}$ precipitation rate in the AZ91 alloy.

• 음성과학
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• 제2권
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• pp.89-94
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• 1997

This study was attempted to analyze the acoustic characteristics of profoundly deaf students. The 59 profoundly hearing-impaired and 36 normal subjects were divided into 3 age groups: 6-10 yrs group, 11-15 yrs group, and 16-20 yrs group. The voice was sampled in /a/ prolongation, counting, reading, and conversation using the Computerized Speech ,Lab (CSL). The vocal pitch of the deaf subjects was significantly higher than the normal subjects. The younger in age was tended to be higher in pitch and jitter values of the deaf subjects. The three age groups of the deaf subjects did not show any difference in loudness and shimmer, excepted to minimum loudness. The pitch mean of males was significantly lower than that for females.

• Structural Engineering and Mechanics
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• 제66권2호
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• pp.263-271
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• 2018

Compressive strength and elastic modulus of concrete are constantly changing with age. In order to determine long-term development of compressive strength and elastic modulus of concrete, an investigation of C30 concrete cured in air conditions was carried out. Changes of compressive strength and elastic modulus up to 975 days were given. The results indicated that compressive strength and elastic modulus of concrete rapidly increased with age during the initial 150 days and then increased slowly. The gain in elastic modulus was slower than that of compressive strength. Then relationships of time-compressive strength, time-elastic modulus and compressive strength-elastic modulus were proposed by regression analysis and compared with other investigations. The trends of time-compressive strength and time-elastic modulus with age agreed best with ACI 209R-92. Finally, factors contributed to long-term development of compressive strength and elastic modulus of concrete were proposed and briefly analyzed.

• 설비공학논문집
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• 제11권1호
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• pp.117-124
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• 1999

In this study, three different supply diffuser types(desktop, floor and ceiling) are compared in view of their ability to distribute supply air to the workstation breathing zone. The measurements on the age of air and the air change effectiveness using the tracer gas method are carried out to analyze the ventilation performance for provision of fresh air between the diffusers. The desktop diffuser type could deliver air directly to the occupants breathing zone with a high degree of effectiveness. The measured local air change effectiveness of the desktop diffuser in the breathing zone was usually 1.13 to 1.23 times greater than that of ceiling and floor diffusers. When the minimum outside air change rate as specified using ASHRAE Standard 62R is supplied with a desktop diffuser type, the volume of outside air can be reduced 13 to 23%, resulting in a commensurate in ventilation energy use.

• Mycobiology
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• 제42권4호
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• pp.416-421
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• 2014

In this study, we examined arbuscular mycorrhizal fungal (AMF) community structure colonizing field-cultivated ginseng roots according of different ages, such as 1- to 5-year-old plant, collected from Geumsan-gun, Korea. A total of seven AMF species namely, Funnelliformis caledonium, F. moseae, Gigaspora margarita, Paraglomus laccatum, P. occultum, Rhizophagus irregularis, and Scutellospora heterogama were identified from the roots using cloning, PCR-restriction fragment length polymorphism and sequence analysis of the large subunit region in rDNA. AMF species diversity in the ginseng roots decreased with the increase in root age because of the decreased species evenness. In addition, the community structures of AMF in the roots became more uniform. These results suggest that the age of ginseng affects mycorrhizal colonization and its community structure.

• 아동학회지
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• 제23권3호
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• pp.171-186
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• 2002

This study of variables associated with maternal monitoring of child's whereabouts and daily activities was conducted with 1500 children (8 and 13 years of age) and their mothers. They responded to questionnaires on monitoring knowledge, sources of maternal information (maternal solicitation and/or child disclosure), and demographic variables. Data were analyzed by Pearson's r, ANOVA, and regression analysis. Mothers' knowledge of her child's activities and whereabouts and the sources of her knowledge were associated with mothers' higher level of education. Child's age was related to mother's knowledge and maternal solicitation. Maternal solicitation and child's age were highly predictive of mothers' knowledge of her child's whereabouts and activities. Results of this study may have applications for parental supervision and child rearing attitudes.

• International Journal of Industrial Entomology and Biomaterials
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• 제7권2호
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• pp.203-208
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• 2003

Rearing temperature influences food consumption, conversion and cocoon production in silkworm Bombyx mori L. Young age $({1^st}to{3^rd} instar)$ worms of Pure Mysore, a multivoltine were reared at 26, 28, 30 and $32^{\circ}C$ followed by combinations of these temperature levels during late age $({4^th} and {5^th} instar)$. Food consumption, conversion, larval duration and growth for each instar were recorded. The influence of combinations of these temperature levels during rearing on survival and cocoon production was assessed. Food consumption increased with the temperature up to $4^th$ instar and decreased during $5^th$ instar. Temperature beyond $28^{\circ}C$ during young age followed by higher temperature ($30^{\circ}C$ and above) has shown deleterious effect on cocoon production. The paper discusses the rearing performance in relation to food intake and conversion under the tested temperature levels.

• 가정과삶의질연구
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• 제16권1호
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• pp.51-62
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• 1998

The purposes of this study were to investigate the difference of maternal parenting stress and social support according to infant's age and to examine the effect of social support and infant's age on parenting stress. The subjects were 145 mothers who have 2-5 olds children. The questionnaire was used as a methodological instrument and the statistics used for data analysis were frequency percentile mean t-test Pearson's r-coefficient and multiple regression. Results of this study indicate that mothers with 2-3 olds child perceived more child's demandingness and mothers with 4-5 olds child perceived more mother's competence. Mothers with 2-3 olds child perceived more social support than mothers with 4-5 olds child. Husbahd's support and infant's age were found to be important variables in predicting parenting stress.