• Journal of the Korean Society of Costume
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• v.60 no.2
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• pp.144-158
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• 2010

The concept and the typical characteristics of ethnic fashion were studied. 267 fashion designs from pret-$\grave{a}$-porter collections in Milan and New York from 2001 S/S to 2005 F/W were analyzed. The major conclusions of the study are as the following: The major types of ethnic fashion are Africa, American Indian, Japan, India, China, and Inca. Among these types, the first volume is Africa, the second is American Indian and others are Japan, India, China and Inca in order. Ethnic fashion changes in years showed reduction from 2001 to 2004, but much rise in 2005 showed more than 30% from 2001. Much more ethnic fashion designs were presented in S/S seasons than in F/W seasons. Africa ethnic fashion designs were more popular in S/S seasons. India ethnic fashion designs were more popular in F/W seasons. In the comparison of the Milan and New York collection, ethnic fashion designs appeared more in Milan collections than in New York from 2001 to 2003. But ethnic fashion designs appeared more in New York collections than in Milan in the year of 2005.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.25 no.1
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• pp.96-107
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• 2001

An unsteady numerical simulation was performed to analyze flow structures behind a local suction/blowing in a flat-plate turbulent boundary layer. The local forcing was given to the boundary layer flow by means of sinusoidally oscillating jet. A version of the unsteady $\kappa$-$\xi$-f(sub)u model (Rhee and Sung 2000) was employed. The Reynolds number based on the momentum thickness was about Re(sub)$\theta$=1700. The forcing frequency was varied in the range 0.011$\leq$f(sup)+$\leq$0.044 with a fixed forcing amplitude A(sub)o=0.4. The predicted results were compared and validated with the experimental data. It was shown that the unsteady locally-forced boundary layer flow is predicted well by the $\kappa$-$\xi$-f(sub)u model. The effect of the pitch angle of local forcing on the reduction of skin friction was also examined.

• Proceedings of the KIEE Conference
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• 1995.11a
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• pp.235-237
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• 1995

The demands of minimizing the reactive power and reducing. the current harmonics are increasing nowadays. The inverter airconditioner needs high power and it operates with wide load range. Conventionally, ah huge LC passive filter is used in airconditioner to improve the P.F and to reduce current harmonics which doesn't gives good results. In this paper, a design of active power factor correction(PFC) circuit for inverter air conditioner is described. To improve the P.F and to reduce the THD, an average current controlled active PFC is designed and tested. Experimental results show that the developed system achieves almost unity P.F and low THD for all load range.

• Child Health Nursing Research
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• v.11 no.1
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• pp.109-116
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• 2005

Purpose: The purpose of this study was to identify the effects of hand acupuncture therapy on dysmenorrhea(pain, related symptoms, ADL). Method: A quasi experimental pre-test and post-test design(experimental group 20, control group 20 by convenience assignment) was used. Data were collected from March to October 2004. The experimental group participated in the treatment(acupuncture & moxibustion on A1(haeum), A4(jaso), A5(samsin), A6(samcho), A8(sinje), A12(wijung), A16(simgyeok), F4(gongson), F6(eumryeom) and ALTENS which is an acupuncture like transcutaneous nerve stimulation), while the control group did not receive any treatment. Data were analyzed using the SAS programme with Fisher's exact χ2 test, paired t-test, and ANCOVA. Results: In the experimental group, pain intensity(f=33.31 p=0.00), related symptoms(t=4.06 p=0.00), ADL difficulty(t=3.85 p=0.00), and medication requirements(χ2=21.00 p=0.00) were significantly lower than those in the control group. Conclusion: These findings indicate that hand acupuncture therapy is effective for reduction of dysmenorrhea. Therefore, hand acupuncture therapy is considered as an independent nursing intervention for reducing dysmenorrhea.

• Child Health Nursing Research
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• v.23 no.4
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• pp.449-458
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• 2017

Purpose: The purpose of this study was to identify factors related to level of satisfaction among mothers of preschoolers. Methods: Participants were 359 mothers of firstborn healthy preschoolers. The questionnaires were collected from August 1 to November 21, 2012. Data were analyzed using SPSS 20.0. Results: The mean score for degree of mothers' parenting satisfaction was 5.94 out of 7. There were significant differences in the level of parenting satisfaction according to mother's job (t=2.48, p=.014), planned pregnancy (t=3.07, p=.002), number of children (t=2.22, p=.027), and parenting education (F=4.33, p=.005). The environmental variables of age of spouse (F=3.06, p=.048) and monthly income of the household (F=2.87, p=.036) also seemed to have an influence. Analysis of predictors such as the mother's job, planned pregnancy, parenting education, overall health problems, parenting stress, perception of emotional status and behaviors in children, age of spouse, and spouse's support explained 31.5% of the variance in mother's parenting satisfaction. Conclusion: The results suggest a need to develop nursing intervention programs for parenting stress reduction, and health programs for fathers to support mothers' child rearing.

• Korean Journal of Adult Nursing
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• v.20 no.5
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• pp.697-706
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• 2008

Purpose: The purpose of this study was to identify the effects of the phytoncides on serum cortisol level, vital signs and life stress of college students. Methods: This study was nonequivalent control group non-synchronized design. The subjects consisted of 60(control group: 28, experimental group: 32). The phytoncides mixed the pine(pinus sylvestris) oil with the cypress(cupressus sempervirens) oil in the same rate. In the experiment, it was put in an aroma-necklace bottle and inhaled 3 times per day(9AM, at noon, before going to bed) for 2 weeks. The data were analyzed by the SPSS version 12.0 program. Results: In the experimental group systolic BP(F=15.603, p=.000), diastolic BP(F=29.489, p=.000) and serum cortisol level(F=4.968, p=.000) were significantly decreased. Conclusion: The phytoncides inhalation is a partly help to reduce college students' life stress. The phytoncides is the incense of the familial tree. We recommended to examine what differences between the green shower and the phytoncides inhalation for the stress reduction.

• Journal of the korean Society of Automotive Engineers
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• v.13 no.5
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• pp.51-64
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• 1991

In this paper, an attempt is made to analyze the impulsive stress directly underneath the concentrated impact point for a supported square plate by using the three-dimensional dynamic theory of elasticity and the potential theory of displacement (stress function) on the supposition that the load, F$_{*}$0 sin .omega.t, acted on the central part of it. The results obtained from this study are as follows: 1. The impulsive stress cannot be analyzed directly underneath the acting point of concenrated impact load in privious theories, but can be analyzed by using the three-dimensional dynamic theory of elasticity and the potential theory of displacement. 2. Theorically, with increasing the pulse width of applied load, it was possible to clarify that the amount of stress in the point of concentrated impact load was increased and that of stress per unit impulse was decreased. 3. The numerical inversion of laplace transformation by the use of the F.F.T algorithm contributes the reduction of C.P.U time and the improvement of the accuracy or results. 4. In this paper recommended, it is found that the approximate equation of impact load function P (.tau.) = A.tau. exp (-B.tau.), and P (.tau.) =0.85A exp (-B.tau.) sinC.tau. could actually apply to all impact problem. In compared with the experimental results, the propriety of the analytical method is reasonable.

• Speech Sciences
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• v.13 no.4
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• pp.69-87
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• 2006

This study aims to describe the vowel system of present-day American English and to discuss some of its phonetic variations due to regional differences. Fifteen speakers of American English from various regions of the United States produced the monophthongs of English. The vowel duration and the frequencies of the first and the second formant were measured. The results indicate that the distinction between the vowels [c] and [a] has been merged in most parts of the U.S. except in some speakers from eastern and southeastern parts of the U.S., resulting in the general loss of phonemic distinction between the vowels. The phonemic merger of the two vowels can be interpreted as the result of the relatively small functional load of the [c]-[a] contrast, and the smaller back vowel space in comparison to the front vowel space. The study also shows that the F2 frequencies of the high back vowel [u] were extremely high in most of the speakers from the eastern region of the U.S., resulting in the overall reduction of their acoustic space for high vowels. From the viewpoint of the Adaptive Dispersion Theory proposed by Liljencrants & Lindblom (1972) and Lindblom (1986), the high back vowel [u] appeared to have been fronted in order to satisfy the economy of articulatory gesture to some extent without blurring any contrast between [i] and [u] in the high vowel region.

• Journal of the Optical Society of Korea
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• v.19 no.6
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• pp.629-637
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• 2015

Compact system cameras (CSCs) are commonly used nowadays and feature enhanced video functions and thin yet light interchangeable lenses. They differ from digital single-lens reflex (DSLR) cameras in their lack of mirror boxes. CSCs, however, have autofocus (AF) speeds lower than those of conventional DSLRs, requiring weight reduction of their AF groups. To ensure the marketability of large telephoto zoom lenses with fixed f/2.8 regardless of field angle variation, in particular, light weight AF groups are essential. In this paper, we introduce a paraxial optical design method and present a new, large, telephoto zoom lens with f/2.8 regardless of the field angle variation, plus a lightweight AF group consisting of only one lens. Using the basic paraxial optical design and optimization methods, we fabricated a new and lighter zoom lens system, including a single-lens, lightweight AF group with almost the same performance.

• Korean Journal of Digital Imaging in Medicine
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• v.14 no.2
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• pp.75-81
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• 2012

The purpose of this study was administered to the body for examination and treatment, high-energy radioactive isotope(F-18, I-131) in vitro discharge experiments. Increasing exposed dose of radiation to health professionals is caused by the increase of PET/CT use and a radioactive isotope. Therefore, the high-energy isotope F-18 and I-131 after administration about using Metabolite excretion was studied. As a results of this study, patients had plenty of fluids for testing and treatment alone administered radiopharmaceuticals can be more than twice as fast excretion induced emissions. Also was able to get a better image space to reduce the dose rate.