• Bulletin of the Korean Mathematical Society
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• v.47 no.5
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• pp.1011-1023
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• 2010

In this paper we define the $L_p$-mixed curvature function of a convex body. We develop a formula connection the support function of $L_p$-mixed projection body with Fourier transform of the $L_p$-mixed curvature function. Using this formula we solve an analog of the Shephard projection problem for $L_p$-mixed projection bodies.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.42 no.10 s.340
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• pp.9-18
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• 2005

Analytical expressions for breakdown voltages of abrupt $p^{+}n$ junction of Si, GaAs, InP and In$In_{0.53}Ga_{0.47}AS$ were induced. Getting analytical breakdown voltages, effective ionization coefficients were extracted using lucky drift parameters of Marsland for each materials. The results of analytical breakdown voltages followed by ionization integral agreed well with experimental result within 10$\%$ in error for the doping concentration in the range of $10^{14}cm\;^{-3}\~5\times10\;^{17}cm\;^{-3}$.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.4
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• pp.103-107
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• 2008

Purpose: This research measured the near addition powers of presbyopia in wearing the near spectacle for the first time. Methods: We evaluated age, sex, working group, spherical power and cylindrical power and measured the power of refractive error performed the both eyes (310 eyes) of 155 subjects subjectively noncycloplegic and power of addition using the cross cylinder method. Results: There were measured the near addition powers in the range of +0.75D ~ +1.75D. In case of the average addition, they were measured with +1.06D in subjects under 43 years of age, +1.08D in 44 to 46 years, +1.23D in 47 to 49 years and +1.46D in over 50 years of age. The average age in subjects was 47.6 years old and 74 male, 81 female, 71 near sighted working group and 83 far sighted working group. Conclusions: Near addition was correlated with age, working group and cylindrical power (P<0.05, P<0.05, P<0.05).

• Journal of Industrial Convergence
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• v.21 no.9
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• pp.103-111
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• 2023

This study was therefore undertaken to investigate the effects of club activities on the communication skills and psychological well-being of nursing students. Convenience sampling method was applied for 101 students enrolled in the nursing department of university in K city, of which 78 subjects participated in club activities. Data was collected from October 31 to November 30, 2022. Data were analyzed by t-test, and hierarchical multiple regression.The average score for Communication skill was 3.97±0.47, psychological well-being values was 3.62±0.44. Statistically communication skill showed a significantly environmental control(β=.27,p=.010) and positive interpersonal relationships(β=.23, p=.026)accounting for 46.8% of the total change and psychological well-being were significantly influenced by communication(β=.29, p=.009) accounting for 47% of the total change. Based on the results of this study, educational strategies and programs are needed to improve the communication skill and psychological well-being of nursing students.

• 대한약리학회:학술대회논문집
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• 2006.11a
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• pp.47-47
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• 2006

• Proceedings of the Korean Vacuum Society Conference
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• 1997.07a
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• pp.47-47
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• 1997

• Proceedings of the Korean Nuclear Society Conference
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• 1998.10a
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• pp.47.2-47
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• 1998

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2002.05a
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• pp.47-47
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• 2002

• Korean Journal of Medicinal Crop Science
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• v.13 no.1
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• pp.30-34
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• 2005

Polygonatum species are a useful medical crop in Korea but basic study in the species was not well conducted. The study was carried out to analyse genetic diversity and intraspecific relationship of 47 Polygonatum species collected from Gyeongnam province. Their analysis was done through principle component analysis and average linkage cluster analysis with their twelve morphological traits. The result of principle component analysis showed the Prin 1, Prin 2 and Prin 3 represented 79% of total variation. By the 0.7 average distance of the cluster analysis and the calculated Euclidian distance, the 47 collected species were grouped into five groups. Group I included 22 collected species representing P. ordoratum var. pluriflorum, group II did 5 ones representing P. involucratum, group III was divided into two subclasses, 2 species including P. inflatum and 7 species including P. thunbergii, group IV also consisted of 2 subclasses, a species similar to P. thunbergii and P.involucratum, respectively, and finally group V included 8 species representing P.lasianthum var. coreanum. meaning that the useful germplasms can be collected from relatively small area.

• 에너지협의회보
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• s.16
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• pp.36-47
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• 1990