• Journal of the Korean Society of Radiology
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• v.11 no.5
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• pp.313-319
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• 2017

The purpose of this study is to confirm the double of optic foramen in Korean and apply it to the Rhese method. First, the angle between the right optic foramen and the MSP was measured on the axial image using MPR technique of the 3D CT. Second, we measured the angle between the right optic foramen and OML in sagittal of MPR images. As a result, the angle between the optic foramen and the MSP was $39.9{\pm}4.63^{\circ}$ on average, which was different from the $53^{\circ}$ presented by Rhese method(p<0.05). The angle between optic foramen and OML was $40.8{\pm}6.6^{\circ}$. In conclusion, this study confirms that the standard of the Rhese method proposed in current textbook is difficult to apply to Koreans. Therefore, it is necessary to study angle of Korean standard in various general x-ray technique.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.7 no.1
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• pp.59-69
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• 1997

The growth and microstructural characterization of epitaxial yttrium silicide ($YSi_2$) on the (100)Si substrate are investigated. The $YSi_2$ film grow epitaxilly through the solid phase reaction during vacuum annealing above $400^{\circ}C$. The epitaxial relationships between the hexagonal $YSi_2$ film and the (100)Si substrate are [0001]$YSi_2$//[011]Si and [0001]$YSi_2$//[011]Si in the (1100)$YSi_2$//(100)Si plane relation. The YSi$_2$ film consists of the two types of domains which have two different azimuthal orientations making an angle of $90^{\circ}$ to each other. The two types of domains in the $YSi_2$film are equivalent in volume fraction and crystalline quality, which has been proved from the equivalent integrated intensities of (2201) asymmetric reflection of X-ray diffraction. The formation of a double -domain structure is discussed on the basis of geometrical matching at interface between the (1100)$YSi_2$ film and the (100)Si substrate, and growth model is proposed.

• Journal of Magnetics
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• v.10 no.1
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• pp.10-13
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• 2005

We have studied effects of the partial substitution of $La^{3+}$ for $A^{2+}$ on the magnetic properties of double perovskites $A_2FeMoO_6$ (A=Ca, Sr and Ba). Polycrystalline $A_{2-x}La_xFeMoO_6(0{\leq}x{\leq}0.2)$ samples have been prepared by the conventional solid-state reaction in a stream of 5% $H_2$/Ar gas. The x-ray data indicate that A=Ca is monoclinic with the space group P$2_1$/n, A=Sr is tetragonal with the space group I4/mmm, and A=Ba is cubic with the space group Fm3m. The substitution of $La^{3+}$ for $A^{2+}$ results in a cell volume increase for A=Ca and a cell volume reduction for A=Ba. The decrease of saturation magnetization with increasing x arises from the reduction of magnetic moment associated with the electron doping and the disorder at the Fe and Mo sites. The partial substitution of magnetic $La^{3+}$ for $A^{2+}$ considerably enhances the Curie temperature $T_c$ from 316 K for x = 0 to 334 K for x = 0.2. This enhancement of $T_c$ with $La^{3+}$ doping originates from electron doping effects in addition to ionic size ones.

• Korean Journal of Materials Research
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• v.28 no.8
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• pp.445-451
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• 2018

We report the structural, magnetic and magnetocaloric properties of $Sr_{1.8}Pr_{0.2}FeMo_{1-x}W_xO_6$($0.0{\leq}x{\leq}0.4$) samples prepared by the conventional solid state reaction method. The X-ray diffraction analysis confirms the formation of the tetragonal double perovskite structure with a I4/mmm space group in all the synthesized samples. The temperature dependent magnetization measurements reveal that all the samples go through a ferromagnetic to paramagnetic phase transition with an increasing temperature. The Arrott plot obtained for each synthesized sample demonstrates the second order nature of the magnetic phase transition. A magnetic entropy change is obtained from the magnetic isotherms. The values of maximum magnetic entropy change and relative cooling power at an applied field of 2.5 T are found to be $0.40Jkg^{-1}K^{-1}$ and $69Jkg^{-1}$ respectively for the $Sr_{1.8}Pr_{0.2}FeMoO_6$ sample. The tunability of magnetization and excellent magnetocaloric features at low applied magnetic field make these materials attractive for use in magnetic refrigeration technology.

• Korean Journal of Optics and Photonics
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• v.9 no.4
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• pp.236-239
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• 1998

We constructed a frequency doubler with a frequency-stabilized Nd:YAG Laser, a nonlinear crystal KTP, and an external resonant cavity. Using type II phase-making method and a resonant cavity, one usually have a serious problem that the second harmonic conversion efficiency is decreased greatly, for under usual circumstances ordinary ray and extraorninary ray cannot be resonated in a cavity simultaneously. With the change of temperature and incident angle of KTP, we found an optimized condition for the phase-matching and double-resonance. As a result we produced 26 mW of green light with 318 mW of fundamental laser power from a cw Nd:YAG laser.

• Journal of Practical Agriculture & Fisheries Research
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• v.20 no.2
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• pp.99-104
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• 2018

A new gerbera cultivar 'Ringgo' was bred by the 'Seohaenongsan' in 2013. 'Ma' with yellow and 'Caravan' with salmon orange, which have semi-double flower, were artificially crossed in 2010. After investigation of the characteristics for four years (from 2010 to 2013), it was selected specially for the use of cut flower. The 'Ringgo' had brilliant orange color (RHS O24A) with dark brown center. The flower was semi-double and 11.1 cm in diameter. And inner ray floret and disc diameter are 6.6 cm and 2.8 cm, respectively. It is a vigorous cultivar having a long and thick peduncle of which length and upper width were 54.7 cm and 4.6 mm, respectively. The vase life of 'Harmony' was 10.1 days, which was 1.2 days longer than the standard cultivar 'Dune'. And its average yield was 55.3 stems per plant, which were 6.6 stems more than the control.

• The Journal of Churna Manual Medicine for Spine and Nerves
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• v.5 no.2
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• pp.33-41
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• 2010

Objectives : This study is designed to find out the relationship of scoliotic curve, cervical lordosis, lumbar lordosis and Ferguson's angle. Method : The study was composed of 46 scoliosis patients who had single curvature(Group I) on their lumbar spine(Group I-A) or thoracic spine(Group I-B) and 38 patients who had double curvature(Group II) on their lumbar and thoracic spine. The patients were evaluated with X-ray findings of full spine AP and Lateral views and statistically analyzed. Results : 1. Group II showed a significant increase in scoliotic curve angle as compared with Group I(P<0.05). 2. Scoliotic curve has a negative relationship with cervical lordosis in group II. Conclusion : 1. The patients who has double curvature of spine had higher scoliotic curve angle compared with who has single curvature. 2. The Scoliotic curve and cervical lordosis was statistically concerned on patients who has double curvature of spine.

• Korean Journal of Breeding Science
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• v.42 no.6
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• pp.703-706
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• 2010

A new gerbera cultivar 'Sunny Lemon' was released by the National Institute of Horticultural and Herbal Science (NIHHS) in 2009. A cross was made between 'Pavlov' and 'Patrick' with pink and semi-double in 2006. After investigation of the characteristics for four years (from 2006 to 2009), it was selected for the use of cut flower. 'Sunny Lemon' is a vigorous cultivar with yellow flower color (RHS Y9C), brown center and semi-double. The average flower diameter is 11.0 cm. And inner ray floret and disc diameter are 7.63 cm and 2.59 cm, respectively. Days to first blooming are 84.5, approximately 2 weeks earlier than the standard cultivar. It produces a large yield with continuous supply of cut flowers and has adequate peduncle height. We believe that 'Sunny Lemon' has a great potential for expanding cultivated area of domestic gerbera cultivars and increasing farmers' income.

• FLOWER RESEARCH JOURNAL
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• v.17 no.4
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• pp.316-319
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• 2009

A new gerbera cultivar 'Lovely Moon' was released by the National Institute of Horticultural & Herbal Science (NIHHS) in 2008. A cross was made between 'Sever Line' and 'Angel' with yellow and semi-double flower in 2005. After investigation of the characteristics for four years (from 2005 to 2008), it was selected specially for the use of cut flowers. 'Lovely Moon' is a vigorous cultivar with yellow (RHS Y13B), yellow green center and semi-double flower. The average flower diameter is 12.7 cm, a large flower. And inner ray floret and disc diameter are 6.10 cm and 2.80 cm, respectively. It produces a large number of flowers with continuous supply of flowers and has a long peduncle height. We believe that 'Lovely Moon' has a great potential for expanding cultivated area of domestic gerbera cultivars and increasing farm income.

• Korean Journal of Breeding Science
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• v.43 no.3
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• pp.206-209
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• 2011

A new gerbera cultivar 'Noble Pink' was released by the National Institute of Horticultural & Herbal Science (NIHHS) in 2009. A cross was made between 'Himalaya' with white and semi-double and 'Vital' with pastel cream and single in 2006. After investigation of the characteristics for four years (from 2006 to 2009), it was selected specially for the use of cut flower. 'Noble Pink' is a vigorous cultivar with pastel pink flower color (RHS R48B), brilliant green disc floret and semi-double. The average flower diameter is 11.8 cm, large flower. And inner ray floret and disc diameter are 4.77 cm and 2.17 cm, respectively. It produces a large yield with continuous supply of cut flowers and has adequate peduncle height. We believe that 'Noble Pink' has a great potential for expanding cultivated area of domestic gerbera cultivars and increasing farmers-income.