• Proceedings of the Korea Concrete Institute Conference
• /
• 2002.10a
• /
• pp.99-104
• /
• 2002

This paper presents an analytical prediction of the fatigue damage of reinforced concrete bridge columns subjected to cyclic load. Material nonlinearity is taken into account by comprising tensile, compressive and shear models of cracked concrete and a model of reinforcing steel. The smeared crack approach is incorporated. In boundary plane at which each member with different thickness is connected, local discontinuity in deformation due to the abrupt change in their stiffness can be taken into account by introducing interface element. The effect of number of load reversals with the same displacement amplitude has been also taken into account to model the reinforcing steel and concrete. The proposed numerical method for fatigue damage of reinforced concrete bridge columns subjected to cyclic load is verified by comparison with reliable experimental results.

• The Korean Journal of Food And Nutrition
• /
• v.14 no.4
• /
• pp.311-316
• /
• 2001

This study was designed to investigate the effective ratio of healthy bread wish green tea powder. The weight. volume, and colon difference of bread with various contents of green tea powder were measured. And the picture of bread and the panel test were taken. To avoid the decrease of volume, the experiment was taken with active gluten. The weight to bread was increased and the volume was decreased significantly according to increase of green tea powder ratio. But, the volume of the group with active gluten(3%+ and 4%+) was higher than that of the group with green tea powder 2%. That is which the correction of the volute was taken by active gluten in green tea powder bread. In the result of panel test and volume measurement. addition of 3% green tea powder was appropriate, and the addition of active gluten corrected the decrease of volume. Therefore. using the green tea powder, the diversity of bread by functionality, nutritional composition. taste, color. flavor of green tea powder can be developed. This result will support the background the development of green tea bread of good quality.

• The Journal of the Korean dental association
• /
• v.48 no.9
• /
• pp.654-663
• /
• 2010

The success in periodontal-prosthetic therapy lies in patient satisfaction with subjective and customized treatment regimen that has been refined for individual needs. To fulfill these requirements, multiple predictors may have to be taken into consideration in the comprehensive treatment planning. Incorporation of complex factors that guarantee the evidence-based therapy would include, but not limited to, osseous morphology, biotype of gingival around abutment, bone morphology of interdental bone and those around furcation area, abutment or bridge mobility. The periodontal-restorative interface should be of mutually protective. Also strategic and esthetic value of abutment teeth to be restored should also be taken into consideration. Taken together, all these should work in concert to enhance the predictability and longevity of abutment teeth in periodontal-prosthetic therapy.

• Korean Journal of Oriental Medicine
• /
• v.3 no.1
• /
• pp.321-333
• /
• 1997

Clinical studies were performed on 119 cases who had HIVD and chronic back pain cured by chuna treatment from August 1984 to June 1997. The results were as follows 1. In 119 cases of HIVD and chronic back pain, 39 cases(32.8%) were male and 80 cases (67.2%) were female. 2. In 119 cases of HIVD and chronic back pain, 19 cases were under the age of 30 and 30 cases were under the age of 40 and 42 cases were under the age of 50 and 28 cases were older than 60 years old. 3. On Duration of Treatment in a Step, 29 cases were taken I -step treatment and 53 cases were taken II -step treatment and 31 cases were taken III -step treatment. 4. In 119 cases of HIVD and chronic back pain, recurrent rate was 12.6%.

• Proceedings of the Earthquake Engineering Society of Korea Conference
• /
• 2001.09a
• /
• pp.131-138
• /
• 2001

The purpose of this study is to investigate size effect on inelastic behavior of reinf bridge piers subjected to cyclic load. A computer program, named RCAHEST(Reinforced Co Analysis in Higher Evaluation System Technologr), for the analysis of reinforced concret was used. Material nonlinearity is taken into account by comprising tensile, compressiv models of cracked concrete and a model of reinforcing steel The smeared crack app incorporated. In boundary plane at which each member with different thickness is conne discontinuous deformation due to the abrupt change in their stiffness can be taken into introducing interface element. The effect of number of load reversals with the same d amplitude has been also taken into account to model the reinforcing steel. To determine th on bridge pier inelastic behavior, a 1/4-scale replicate model was also loaded for compar full-scale bridge pier behavior.

• Proceedings of the Earthquake Engineering Society of Korea Conference
• /
• 2002.09a
• /
• pp.133-140
• /
• 2002

The purpose of this study is to investigate the seismic behavior of reinforced concrete bridge piers and to provide the data for developing improved seismic design criteria. A computer program, named RCAHEST(Reinforced Concrete Analysis in Higher Evaluation System Technology), for the analysis of reinforced concrete structures was used. Material nonlinearity is taken into account by comprising tensile, compressive and shear models of cracked concrete and a model of reinforcing steel. The smeared crack approach is incorporated. In boundary plane at which each member with different thickness is connected. local discontinuity in deformation due to the abrupt change in their stiffness can be taken into account by introducing interface element. The effect of number of load reversals with the same displacement amplitude has been also taken into account to model the reinforcing steel and concrete. The proposed numerical method for the prediction of seismic behavior for reinforced concrete bridge piers is veri fief by comparison with the reliable experimental results.

• International Journal of Safety
• /
• v.7 no.1
• /
• pp.26-29
• /
• 2008

The purpose of this study is the measurement of whole-body vibration for different road surfaces. Experimental measurements were taken on asphalt, cement, and off-road surfaces as defined by ISO 2631-1. Each experiment was conducted under the same set of conditions (measurement duration, times, speed, vehicle type). Measurement duration was 10 minutes and 3 separate measurements were taken on each road surface. Vehicle speed was 60km/h. In accordance with ISO 2631-1, an acceleration sensor is set up between the driver's seat and the human body. For evaluation, RMS(root-mean-square) values were taken as suggested by ISO 2631-1. The results suggest "health guidance caution zones", and the evaluation was based on obtaining the vector sum with "health guidance caution zones".

• Journal of Korea Multimedia Society
• /
• v.18 no.2
• /
• pp.106-112
• /
• 2015

In this paper, we propose a method for correction of perspective distortion on a taken image. An image taken by a camera is caused perspective distortion depending on the direction of the camera when objects are projected onto the image. The proposed method in this paper is to obtain the normal vector of the plane through the depth information using a depth camera and calculate the direction of the camera based on this normal vector. Then the method corrects the perspective distortion to the view taken from the front side by performing a rotation transformation on the image according to the direction of the camera. Through the proposed method, it is possible to increase the processing speed than the conventional method such as correction of perspective distortion based on color information.

• Journal of Korean Society of Forest Science
• /
• v.85 no.2
• /
• pp.300-308
• /
• 1996

This study was conducted to identify factors involved in rooting of Japanese larch cuttings. Cuttings were taken every week from June 24th to July 25th before and after the 10th of July which supposed to be best time for cutting. The content of IAA, carbohydrate, nitrogen and inorganic elements such as $Mg^{{+}{+}}$, $K^+$ and $Ca^{{+}{+}}$ within cutting materials were analyzed. After the cuttings were planted, the root development was observed every week. Cuttings of easy-to-root clones were higher in IAA contents than the cuttings of hard-to-root clones at the time of cuttings were taken. There were significant differences in moisture content of cuttings taken on June 24th and July 25th between easy-to-root and hard-to-root clones, however no significant differences in moisture contents were observed between them taken on the 8th and 15th of July which supposed to be the best time for cutting. Inorganic matters and carbohydrate contents of cuttings taken from hedged trees were higher than those of non-hedged trees. The ratios K/C and C/N of cuttings taken from hedged trees were higher than those of non-hedged trees. Cuttings taken from easy-to-root clones showed higher content of carbohydrate and nitrogen than those of hard-to-root clones. The contents of inorganic elements, such as $Mg^{{+}{+}}$, $K^+$, and $Ca^{{+}{+}}$ in cutting taken from hard-to-root clones were slightly higher than that of easy-to-root clones. The ratio C/N and K/C of cuttings which were taken from easy-to-root clones have shown a similar trend of carbohydrate and nitrogen. These data indicate that there was no one dominant factor that affect rooting of cutting, but many factors such as contents of IAA, carbohydrate, nitrogen, phosphate, and ratios of C/N and K/C appeared to affect on rooting of cuttings variously. Most of root initials were formed from phloem tissue within one week after cutting, and few were formed from callus tissue. Root primordia were developed from root initials within two weeks after cutting, and most of new roots were developed from root primordia within about five weeks after cutting.

• Korean journal of food and cookery science
• /
• v.1 no.1
• /
• pp.82-93
• /
• 1985

An investigation was conducted on Seoulites' meals outside home by age group and sex, and the resultant findings are as follows: 1. To effectively conduct this survey were taken 201 teen males, 242 teen females, 202 young males, 232 young females, 219 men and 195 women. 2. For the kinds of meals they have outside home, breakfast forms 0.7%, lunch 35.7%, supper 22.2%, and snacks 14.4%. 3. Men subjects "lunch out everyday" by 39.9%, young males by 30.7%, and young females by 29%. 4. The reason why they lunch out indicates "convenient" by 37.4%, "carrying a lunch box is inconvenient" by 21.2%, "hard to prepare the lunch box" by 12.9%. 5. Regarding the favorite food taken for lunch, almost all the men prefer Korean food by 73.9% 6. Ra Myun and noodle occupy the highest Percentage of young females by 79.3% ; Chinese food the highest percentage of women by 27.7%, but the lowest percentage come from Japanese food by 1.1%. 7. The preference of kinds of food when having a meal outside home is ascribed to "prefer"by 50~75.7%, the highest percentage of all. 9. The price they pay for lunch outside home amounts to less than 900 wons in teens and young males 1, 000~2, 000 wons in men and women. The price of a meal outside home per capita a day, when taken by family unit, averages to 3, 694 wons. For the number of meals outside home, "more than once a month" forms 41.7%. 9. On the mooted points raised when having a meal outside home, "unsanitary' forms 36.7%, "expensive in prices" 26.1%, "lack of nutritution" 10.6%. 10. Teen males, when viewed from food preference for lunch outside home, take Ra Myun, Ddokbokki, Chinese noodle, while teen females, Ddokbokki, bread, Chinese noodle: young males, Sundubu Baekban, Bibim Bab, Ra Myun, Yokge Jang; young females, Sundubu Baekban, pork cutlet, Bibin Bab: men, Solnone Tang, Daenjang Chikae, Baekban, Kalbi Jongsik Bibim Bab : women, Bulkogi Jongsik, Neang Moyn, and Chinese noodle. 11. When seen from the nutrition of meals taken outside home, the prices of noodle and boiled rice range from 600 to 1, 000 wons, while their energy ranges from 407 to 745 kcal, Protein from 14.2 to 30.3g. On the other hand, the Price of western food averages to 1, 900~2, 500 wons, while its energy ranges from 1, 061 to 1, 129 kcal, proteio from 45.9 to 72.9g. It is revealed that noodle or boiled rice is not nutritious enough to be taken as a meal.s revealed that noodle or boiled rice is not nutritious enough to be taken as a meal.