• The Journal of Korean Academic Society of Nursing Education
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• v.19 no.4
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• pp.498-507
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• 2013

Purpose: This study was conducted to investigate the relationship of aging knowledge, attitudes and awareness about supporting the aged in undergraduate students. Method: The participants were 385 undergraduate students in H University in G city. Data were collected from March 1 to April 30, 2012, and analyzed using SPSS/WIN 18.0. Results: The mean of the aging knowledge score was 51.40, the mean of aging attitudes score was 3.06, and the mean of awareness about supporting the aged score was 4.11. Awareness about supporting the aged showed a positive correlation with aging knowledge (r=.299, p<.001). Awareness about supporting the aged showed a positive correlation with aging attitudes (r=.244, p<.001). Conclusion: The findings of this study indicate a need to develop programs for undergraduate students to increase correct aging knowledge, to encourage appropriate aging attitudes and awareness about supporting the aged. In addition, the need for further studies to examine effects of programs are needed.

• Proceedings of the Korea Concrete Institute Conference
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• 2000.10a
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• pp.503-507
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• 2000

The corrosion protection methods of reinforcing steel in concrete are the various methods such as increasing thickness of cover concrete, using of reinforcing bars coated with epoxy, dosage of corrosion inhibitor as concrete admixture, cathodic protection method and etc. In this study, the performance of corrosion protection was investigated for the test specimens using corrosion inhibitors and cathodic protection, respectively. For this purpose, the accelerated corrosion tests for reinforcing steel were conducted according to the periodic cycles(140 days) of wetting($65^{\circ}C$, 90% R.H) and drying period($15^{\circ}C$, 65% R.H) for the test specimens. As a result, it can be concluded from the test that the effect of corrosion inhibitor was found to be variable with products, the cathodic protection method was found to be independent of salt concentration in concrete.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.45 no.5
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• pp.507-512
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• 2012

One leptocephalus (TL 59.9 mm) from the family Ophichthidae collected from Jeju Island, Korea, was identified using morphological and molecular methods. Our ophichthid leptocephalus was identified as belonging to the genus Muraenichthys based on morphological characters: 157 myomeres; the origin of the dorsal fin located a little in front of the anus; a distinct melanophore present on the opercle; and six gut swellings present. An analysis of 886 base pairs of the 12S rRNA mtDNA sequences showed that our leptocephalus must be Muraenichthys gymnopterus, because its sequences were concordant with those of an adult M. gymnopterus (d=0.001) and next to those of Muraenichthys sp. leptocephalus (d=0.034). Here, we are the first to describe the morphological characteristics of the M. gymnopterus leptocephalus.

• Journal of Korea Technology Innovation Society
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• v.6 no.4
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• pp.492-507
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• 2003

Material is enabling technology that creates the product performance and the service of most industrial sectors and fields of technology. However, compared to the other fields such as IT, BT, and NT etc., relatively little attention has been paid to the research on strategy and innovation of materials technology. This bias should have resulted in the misfit of policy and less than enough investment in materials innovation. This paper discusses the characteristics, process, and future of the materials innovation. The process and status of materials technology in Korea are analyzed based on the discussions above. Finally, some suggestions for R＆D strategies of Korea are presented on the basis of the nature, trend and barriers of materials innovation.

• Bulletin of the Korean Mathematical Society
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• v.60 no.2
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• pp.507-514
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• 2023

Suppose that a line passing through a given point P intersects a given circle 𝓒 at Q and R in the Euclidean plane. It is well known that |PQ||P R| is independent of the choice of the line as long as the line meets the circle at two points. It is also known that similar properties hold in the 2-sphere and in the hyperbolic plane. New proofs for the similar properties in the 2-sphere and in the hyperbolic plane are given.

• Archives of Pharmacal Research
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• v.29 no.6
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• pp.503-507
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• 2006

Flavonoids are known as natural anti-inflammatory agents. In this investigation, an anti-inflammatory potential of new topical preparation (SK Ato $Formula^{\circledR}$) containing flavonoid mixtures from Scutellaria baicalensis Georgi roots and Ginkgo biloba L. leaves with an extract of Gentiana scabra Bunge roots was evaluated in an animal model of chronic skin inflammation. Multiple 12-O-tetradecanoylphorbol-13-acetate treatments for 7 consecutive days on ICR mouse ear provoked a chronic type of skin inflammation: dermal edema, epidermal hyperplasia and infiltration of inflammatory cells. When topically applied in this model, this row formulation $(5-20\;{\mu}L/ear/treatment)$ reduced these responses. Furthermore, it inhibited prostaglandin $E_2$ generation (17.1-33.3%) and suppressed the expression of proinflammatory genes, cyclooxygenase-2 and $interleulin-1{\beta}$ in the skin lesion. Although the potency of inhibition was lower than that of prednisolone, all these results suggest that Ato $Formula^{\circledR}$ may be beneficial for treating chronic skin inflammatory disorders such as atopic dermatitis.

• Journal of Physiology & Pathology in Korean Medicine
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• v.16 no.3
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• pp.507-513
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• 2002

Jaeumgenby-tang(JGT) have been used in oriental medicine for many centries as a a therapeutic agent of vertigo caused by deficiency of qi and blood. The effects of JGT on the regional cerebral blood flow(rCBF), mean arterial blood pressure(MABP) and cardiac muscle contractile force(CMF) is not known. The purpose of this Study was to investigate effects of JGT on the rCBF, MABP, CMF and mechanism of JGT induced changed rCBF, MABP, CMF. The changes of rCBF, MABP and CMF were determinated by Laser-Doppler Flowmetry(LDF). The results were as follows; JGT extract was increased rCBF, MABP and CMF in a dose-dependent, specially JGT extract was significantly increased rCBF and MABP. Pretreatment with propranolol was significantly inhibited JGT induced increase of rCBF but pretreatment with indomethacin and methylene blue were accelerated JGT induced increase of rCBF. Pretreatment with propranolol and indomethacin were inhibited JGT induced increase of MABP, but pretreatment with methylene blue was accelerated JGT induced increase of MABP. Pretreatment with propranolol was significantly inhibited JGT induced increase of CMF but pretreatment with indomethacin and methylene blue were accelerated JGT induced increase of CMF. This results suggest that JGT increased rCBF by increasing MABP and CMF and the action of JGT is mediated by adrenergic β-receptor.

• The korean journal of orthodontics
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• v.30 no.2 s.79
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• pp.223-233
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• 2000

An epidemiological investigation was carried out at Yongin, Kyungkido, South Korea to determine the prevalence of symptoms of temporomandibular disorders and parafunctional habits in adolescent aged 16, 17 and 18 years. 2,098 students(male 507, female 1,591) were randomly selected and investigated with the questionnaire. The results were obtained as follows, 1. The prevalence of symptoms of temporomandibular disorders was $80.9\%$ total, $77.3\%$ for male and $82.0\%$ for female with significance between male and female(P<0.05). 2. The prevalence of symptoms of temporomandibular disorders was gradually increased according to increasing age with significant difference among ages(P<0.001) 3. The most frequent symptom in the temporomandibular disorders is pain on chewing($65.9\%$), and then clicking($50.7\%$), Pain on mouth opening($41.8\%$), and pain on TMJ($36.8\%$) 4. There was little corelationship between clenching habits and symptoms of temporomandibular disorders(r=0.166), and also between bruxing habits and those(r=0.057).

• Korean Journal of Weed Science
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• v.32 no.1
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• pp.44-51
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• 2012

This study was conducted to predict the rice yield loss and to determine the economic threshold levels for direct-seeding flooded rice cultivation from competition to the most serious perennial weeds, Cyperus serotinus Rottb. and Echinochloa crus-galli L. The rice yield loss model of C. serotinus and E. crus-galli were predicted as Y = 560 kg/(1+0.001883x), $r^2$=0.933, and Y = 507 kg/(1+0.001734x), $r^2$=0.867, respectively. In comparison of the competitiveness represented by parameter ${\beta}$, it was 0.001883 in C. serotinus and 0.001734 in E. crus-galli, respectively. Economic thresholds calculated using Cousens' equation were negatively related with the competitiveness of weed. The economic thresholds of C. serotinus and E. crus-galli were 15.5 and 2.3 plants per $m^2$, respectively.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.6
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• pp.231-239
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• 2018

This study was conducted to examine the influence of personal characteristics of infant-toddler and mother, social support and mother-child interaction on mother-child attachment. A descriptive study was implemented, and data were gathered from March 1 to September 30, 2016. The subjects were 215 mothers whose children were in infancy or toddlers. A survey was conducted with self-administered questionnaires regarding general characteristics, social support, mother-child interaction and attachment. SPSS 24.0 was used for descriptive statistics, intergroup comparisons of average scores, correlation analysis and multiple regression analysis. Statistically significant differences in average attachment scores according to gender (t=3.200, p<0.002), age (t=4.037, p<0.001) and temperament (F=4.614, p<0.011) were observed among the characteristics of infant-toddlers, as well as according to age (F=18.028, p<0.001) and academic credentials (F=4.241, p<0.016) among the characteristics of mother. Attachment was correlated with social support (r=0.507, p<0.001) and with mother-child interaction (r=0.571, p<0.001). The factors that affected attachment were mother-child interaction (${\beta}=0.361$, p<0.001), social support (${\beta}=0.309$, p<0.001), age (under the age of 30)(${\beta}=-0.370$, p<0.001) and marriage duration (less than 10 years)(${\beta}=-0.179$, p<0.033). Overall, the results indicate that interaction programs that bolster social support and mother-child interactions that exert a crucial influence on attachment should be developed.