• Korean Journal of Soil Science and Fertilizer
• /
• v.30 no.1
• /
• pp.62-66
• /
• 1997

This study was designed to obtain the mean values of thirteen soil physico-chemical properties for different paddy soil management groups, and to serve the basic information for improving the soil using amendments. Computerized data on the results of detailed soil survey were used in this study. The clay contents in the B horizon of paddy soil management groups were 28.3% in the well adapted type, 11.8% in the sandy textured type, and 26.8% in the newly reclaimed type. Soil pH of B horizon in the paddy soil management groups except poorly drained type and acid sulfate type were higher than those of A horizon. In the river side paddy soils of well adapted type, the clay contents of A and B horizons were 16.8%, 23.1%, respectively, and soil organic matter contents of those horizons were 42g/kg, 18g/kg, respectively. And also available phosphate content of well adapted type was higher than the other types. Frequency of distribution of soil organic matter content levels in the B horizons of sandy textured type and newly reclaimed type were higher in the organic matter content range of below 10g/kg. And those of well adapted, poorly drained, and saline type were higher in the organic matter content range of 10~20g/kg. Correlation coefficients between 13 variables in the B horizon of well adapted type were all highly significant at 1% or 5% level, respectively.

• Economic and Environmental Geology
• /
• v.13 no.2
• /
• pp.69-79
• /
• 1980

Granitic rocks, from the Eonyang and the northwestern part of Ulsan area, were mainly studied from the petrochemical point of view. From field work, microscopic observation and the result of K-Ar ages, these granitic rocks are divided into six rock types of a, b, c, d, e and e', of which modal composition are given. Type a, c, e and e' are mainly granodiorite, type b is adamellite, and type d is granodiorite, adamellite and others (porphyritic rock, porphyry and felsitic rocks). Bulk chemical analyses of 22 samples of the granitic rocks are given. The petrographical and petrochemical characteristics of these rocks are discussed briefly. In the petrochemical compositions with their characteristic variation trends of several oxides and norm Or-Ab-An triangular diagram, type a, b and c show some similarity to that of San-yo granite of Japan and younger granite of Ogcheon geosynclinal zone, and then, type e and e', to San-in granite of Japan. But, some of granitic rock samples of type d are similar to San-yo granite and the others of type d to San-in granite because this type is composed of porphyritic rock, porphyry and felsitic rocks. According to the result of K-Ar ages (1976, Lee et al.) of rock samples from type a, b and care Cretaceous, on the otherwise, type d, e and e', are Tertiary granitic rocks. Judging from these evidences, granitic rocks in the area are correlated to the Cretaceous and Tertiary granitic rocks in the, southwestern Japan, that is, type a, band c are correlated to San-yo granite, and type d, e and e' to San-in granite.

• Korean Journal of Applied Biomechanics
• /
• v.13 no.3
• /
• pp.199-215
• /
• 2003

The purpose of this study was to attempt new starting motion and supply present starting motion in the 500M short track speed skating according to the center of gravity position. The center of gravity position ratio was divided starting motion into five(type A : front 80%-back 20%, type B front 70%-back 30%, type C : front 50%-back 50%, type D : front 30%-back 70%, type E : front 20%-back 80%). The three dimension motion analysis with DLT(direct linear transformation) method was executed using two video cameras. The following conclusion was that It was appear that reaction and execution time in starting motion was the most short in type B. It was characteristic that step of skaters was shorten and center of gravity position ratio was not effect to change of the step in each event. It was appear that the displacement of type D and type E were longer than that type A and type B during the starting motion. It was appear that skill types of center of gravity position ratio to the front were lower than that to the back and contract a posture. Observing the above, it was conclusion that skill type B of center of gravity position ratio to the tent was more effect than that to the back. But it is important that these skill type was most used to the competition and estimate the result.

• Journal of Korean Foot and Ankle Society
• /
• v.12 no.1
• /
• pp.80-85
• /
• 2008

Purpose: To evaluate and compare the outcome between interlocking IM nailing and LCP fixation in the treatment of distal metaphyseal tibial fracture. Materials and Methods: From January 2000 to December 2007, 17 patient were treated by interlocking IM nail and 13 patient were treated by LCP fixation for distal metaphyseal tibial fracture. Results: According to AO classification, there were 2 type A1 fracture (12%), 6 type A2 fracture (36%), 3 type A3 fracture (18%), 4 type B1 fracture (24%), 1 type B3 fracture (6%), 1 type C1 fracture (6%) in interlocking IM nailing group and 1 type A2 fracture (7.7%), 2 type A3 fracture (15.4%), 3 type B1 fracture (23%), 3 type B2 fracture (23%), 3 type C1 fracture (23%), 1 type C2 fracture (7.7%) in LCP fixation group. The clinical functional outcome (according to AOFAS score) is 75.6 point in IM nailing group and 81.5 point in LCP fixation group. In IM nailing group, 65% of patient showed satisfactory result and In LCP fixation group, 77% of patient showed satisfactory result. Conclusion: There is no difference on clinical results between IM nailing and MIPPO (minimal invasive percutaneous plate osteosynthesis) group in the treatment of distal tibia fracture. But MIPPO group have higher subjective satisfactory score and less complication rate. The weakness of our study is a small case number and limited follow-up and we believe a better designed prospective study will be needed.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.12 no.1
• /
• pp.183-192
• /
• 2008

Generally, application of steel pipe pile as deep foundation member needs special requirement for the connection method between steel pipe pile and concrete footing. Even though two types of connection method are suggested in the korea highway bridge code, type-B method is prevalent. In this study, vertical, lateral, and tension loading test are done for two types of type B connection to review stress concentration, formation and behavior of imaginary RC column in the footing. Welding type and hook type as the connection method are considered in this study. Test results show that welding type have the more reserve capacity than hook type and the specimens connected by the welding type behave as the imaginary RC column in the footing. However, the specimens connected by the hook type did not behave as the imaginary RC column in the footing but behave as the hinge.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.34 no.8
• /
• pp.1233-1241
• /
• 2010

This study analyzes the body characteristics of high school boys according to 3 different body types in order to improve the fit of upper garments. First, among the lateral body types, the straight body type was selected from the SizeKorea 3D scanned data and 2D measurement data. Second, high school boys (classified as straight lateral body type) were grouped into type B, A, and Y drop groups. The percentages of type B, type A, type Y are 17.8%, 48.1%, 32.1% respectively. The characteristics of the body types were analyzed. While the bust circumference were the same among the three body types (chest width, back width, back across shoulder, and bust width did not show a significant difference); however, waist and hip measurements showed a significant difference among the three body types. Third, the height of the high school boys ranged between 165cm and 180cm and the bust circumference between 85cm and 97cm. For the bust size categories, type B and type Y are distributed similarly; however, type A is distributed in the smaller bust size categories.

• Korean Journal of Veterinary Research
• /
• v.27 no.1
• /
• pp.47-52
• /
• 1987

The serological typing of staphylococcus hyicus subsp. hyicus isolated from pigs with exudative epidermitis and healthy pigs was attempted by slide agglutination technique with absorbed sera prepared from antisera against swine strains of the organism. Of 204 Staph. hyicus subsp. hyicus isolated, 202 (99.0%) were classified into 6 serotypes tentatively designated as A, B, C, D, E and F. The organisms were found to possess common antigens and a strain specific antigen. In 26 epizootics of exudative epidermitis, type A was found in 4(15.4%), type B in 12(46.2%), type C in 9(34.6%) and type E in 1(3.8%). All of the piglets of each affected litter were infected by serologically identical strain. In 178 strains isolated from the skin of healthy pigs, type A was found in 14.1%, type B in 23.0%, type C in 30.3%, type D in 1.7%, type E in 7.9% and type F in 21.9%, and 2 strains were untypable. There was a difference in the occurrence of serotypes of Staph. hyicus subsp. hyicus among the farms examined.

• Journal of the Korean Mathematical Society
• /
• v.38 no.6
• /
• pp.1191-1204
• /
• 2001

The paper is devoted to the study of fractional integration and differentiation on a finite interval [a, b] of the real axis in the frame of Hadamard setting. The constructions under consideration generalize the modified integration $\int_{a}^{x}(t/x)^{\mu}f(t)dt/t$ and the modified differentiation ${\delta}+{\mu}({\delta}=xD,D=d/dx)$ with real $\mu$, being taken n times. Conditions are given for such a Hadamard-type fractional integration operator to be bounded in the space $X^{p}_{c}$(a, b) of Lebesgue measurable functions f on $R_{+}=(0,{\infty})$ such that for c${\in}R=(-{\infty}{\infty})$, in particular in the space $L^{p}(0,{\infty})\;(1{\le}{\le}{\infty})$. The existence almost every where is established for the coorresponding Hadamard-type fractional derivative for a function g(x) such that $x^{p}$g(x) have $\delta$ derivatives up to order n-1 on [a, b] and ${\delta}^{n-1}[x^{\mu}$g(x)] is absolutely continuous on [a, b]. Semigroup and reciprocal properties for the above operators are proved.

• Proceedings of the IEEK Conference
• /
• 2005.11a
• /
• pp.119-122
• /
• 2005

In this paper, we investigated the recognition range according to modulation index for the ISO(International Standards Organization) 14443 13.56MHz contactless Type B RFID(Radio Frequency IDentification) system. We measured recognition range with changing modulation index step by step from 5% to 24% where we used 4 samples of Type B transponder with different resonance frequencies between 13.838MHz and 17.200MHz. While gradually increasing a distance in vertical direction from the center of the reader antenna, we measured the distance where the transponder's PUPI(Pseudo Unique PICC(Proximity IC Card) Identifier) is recognized continuously during 10 seconds and the distance where the transponder's PUPI is recognized at least two times during 5 seconds. From the measurement results, we found that the best recognition ranges were achieved when the reader had modulation index between 11% and 14%.

• Korean Journal of Microbiology
• /
• v.20 no.4
• /
• pp.183-188
• /
• 1982

The neurotoxin of Clostridium botulinum type B was purified from a liquid culture. The purification steps consist of ammonium sulfate precipitation of whole culture, treatment of Polymin P(0.15%, v/v), gel filtration on Sephadex G-100 at pH5.6 and DEAE-Sephadex charomatography at pH8.0. The procedure recovered 17% of the toxin assayed in the starting culture. The toxin was homogeneous by sodium dodecyl sulfate(SDS)-polyacrylamide gel electrophoresis and had a molecular weight of 163, 000. Subunits of 106, 000 and 56, 000 molecular weight were found when purified toxin was treated with a disulfide-reducing agent and electro phoresed on SDS-polyacrylamide gels.