• Journal of the Korea institute for structural maintenance and inspection
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• v.5 no.3
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• pp.181-189
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• 2001

Recently, the need for strengthening reinforced concrete(R.C.) structure has been increased, particularly when there is an increase in load requirements, a change in use, a degradation problem, or design/construction defects. The use of composite materials for structural repair presents several advantages and has been investigated all over the world. It is well known that the incorporation of carbon fiber sheet(CFS) with concrete is one of the most effective ways to strengthen the R.C. structure. In this papers, experimentally investigated the ductile behavior of the R.C. beams strengthened with CFS, and provided the basic data for design of R.C. beams strengthened with CFS. Tests were carried out with 15 beams ($20cm{\times}30cm{\times}240cm$) reinforced with CFS, and with parameters including and the ratio of tensile reinforcement to that of balanced condition and number of CFS. The results show that strengthened and non-strengthened beams exhibit different ductile behovior. Non-strengthened beams showed increase of ductility as amount of the tensile reinforcement decreased. However, bearing capacity of the CFS-strengthened beams are dictated by the strength of the CFS layers that a very high ductility is indicated for the beams with large number of CFS.

• Tribology and Lubricants
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• v.14 no.3
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• pp.59-64
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• 1998

This paper presents the deformation characteristics of cam ring in a balanced type vane pump. Cam ring is operated in the high-pressure condition. Therefore the local deformation of cam ring affects the characteristics of compression, vane motion and noise and vibration. We analyzed the deformation of cam ring for the three types by using the finite element method. The deformed shape of cam ring and the effects of deformation on the compression are presented. As a result of analysis, we know that the right hole of the cam ring has advantage for reducing the pressure overshoot.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.1954-1961
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• 2007

This project of total city plan is developed for the area of DONGDAEGU station in the field of new city-core which is adapted for a forefront city and rational restructuring of the city space and improving for balanced growth according to the first phase operation of Korean high speed line and its complete construction to BUSAN. Bring a new heart of this city of the area of DONGDAEGU station which is a gateway to DAEGU city so that the area contrives a new creation of the city space, balanced developing and activation of a region economy. Deliberate for plan of private capital for harmonious to develop a territory of station therefore it raises an emblem of DAEGU city and activates an economy of the city according to the new trend of the condition of transportation integrated administration of a large regionand new development of DONGDAEGU station.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.1254-1266
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• 2007

This project of total city plan is developed for the area of DONGDAEGU station in the field of new city-core which is adapted for a forefront city and rational restructuring of the city space and improving for balanced growth according to the first phase operation of Korean high speed line and its complete construction to BUSAN. Bring a new heart of this city of the area of DONGDAEGU station which is a gateway to DAEGU city so that the area contrives a new creation of the city space, balanced developing and activation of a region economy. Deliberate for plan of private capital for harmonious to develop a territory of station therefore it raises an emblem of DAEGU city and activates an economy of the city according to the new trend of the condition of transportation integrated administration of a large regionand new development of DONGDAEGU station.

• Journal of Korean Society for Quality Management
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• v.23 no.3
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• pp.126-139
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• 1995

We describe a formal approach to the construction of optimal classification rule for the two-group normal classification with equal population mean problem. Based on the utility function of Bernardo, we suggest a balanced design for the classification and construct the optimal rule under the balanced design condition. The rule is characterized by a constrained minimization of total risk of misclassification, the constraint of which is constructed by the process of equation between expected utilities of the two group conditional densities. The efficacy of the suggested rule is examined through numerical studies. This indicates that, in case little is known about the relative population sizes, dramatic gains in accuracy of classification result can be achieved.

• East Asian mathematical journal
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• v.5 no.1
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• pp.95-110
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• 1989

In a general variance component model, nonnegative quadratic estimators of the components of variance are considered which are invariant with respect to mean value translaion and have minimum bias (analogously to estimation theory of mean value parameters). Here the minimum is taken over an appropriate cone of positive semidefinite matrices, after having made a reduction by invariance. Among these estimators, which always exist the one of minimum norm is characterized. This characterization is achieved by systems of necessary and sufficient condition, and by a cone restricted pseudoinverse. In models where the decomposing covariance matrices span a commutative quadratic subspace, a representation of the considered estimator is derived that requires merely to solve an ordinary convex quadratic optimization problem. As an example, we present the two way nested classification random model. An unbiased estimator is derived for the mean squared error of any unbiased or biased estimator that is expressible as a linear combination of independent sums of squares. Further, it is shown that, for the classical balanced variance component models, this estimator is the best invariant unbiased estimator, for the variance of the ANOVA estimator and for the mean squared error of the nonnegative minimum biased estimator. As an example, the balanced two way nested classification model with ramdom effects if considered.

• Transactions of Materials Processing
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• v.13 no.7
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• pp.580-585
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• 2004

Almost all injection molds have multi-cavity runner system fur productivity and are designed with geometrically balanced runner system in order to minimize filling imbalance between cavity to cavity during processing. However, filling imbalances have been observed though geometrically balanced runner lay-out. Generally, these filling imbalances are due to thermal unbalance, viscosity, characteristic of polymers and so on. These kinds of filling imbalances have already been reported by Beaumont since 1997, but his research has mainly focused on filling imbalance at binary runner. In this study, we conducted an experimental study about the filling imbalances in unary branch runner as well as binary branch runner and inquired into the causes of filling imbalances. The results could be summarized as fellowing: Filling imbalances existed in multi-cavity mold with unary branch runner, it could be decreased by optimizing processing condition such as increasing injection rate, and it is almost proportion to each polymer's temperature sensibility.

• Journal of the Korean Society of School Health
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• v.5 no.1
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• pp.111-119
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• 1992

The study examined the difference of the physique, the physical strength, and the physical constitution between meal and non-meal service schools at the countryside, and concluded as follows: 1) The effects on the physical development Meal service school student's height was 0.41~2.38cm taller, weight 0.21~1.58kg heavier, and the chests 0.15~2.55cm bigger than the non-meal service school students. Therefore, the effects of the school meal service on the student's physique development proved positive. 2) The effects on the physical strength Today, the student's physical growth is reinforced by consuming high calorie food, while their physical exercise is decreased. As a result, obesity becomes another problem. In this respect, physical strength is a significant factor in judging the physical condition of the students. This study compared the meal service schools with the non-meal service schools by suing six items of the physical strength test those schools. In comparison, the meal service school students were better than the others in most items except in the eleven year old girl's 100 meter running and the ball throwing, and the ten year old boy's 600meter running. It means that school meal service affects the physical growth in a positive manner. 3) The effects on the physical constitution The students in their growing period should have their meals not only balanced, but regularly since this helps to maintain their health. Insufficient nutrition may disturb the balanced physical growth of cause a weak or powerless physical constitution. As shown at the table 6, meal service school students who had a balanced meal have 0.01% lower incidence of disease. and 3.11~7.32% less myophia than the other. The average 0.39 to 0.63 cavity of the meal service school students also show that their constitutions are better than the non-meal service ones. In conclusion, the school meal service program gives every student a regular nutritious meal which results in a balanced physical growth. Erentually, the healthier students could be the healthier social menbers which promise a brighter society in the future.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.8 no.4
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• pp.323-331
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• 1997

In this paper, the high efficiency balanced amplifier is presented as high efficiency power amplifier. This amplifier is basically composed of two FETs, an input power divider, output power combiner, input matching circuits, output matching circuits, second harmonic interconnection circuit and lowpass filter. The second harmonic interconnection circuit is composed of second harmonic frequency bandpass filter and transmission line. This circuit is inserted between the output terminals of the two FEF's output matching circuit, there is a second harmonic standing wave generated between two FET outputs. The electric wall termination is equivalent to the short circuit termination. As a result, the FET output termination condition needed to attain high efficiency is realized. Experimental high efficiency balanced amplifier is constructed to determine its practically attainable efficiency. The input VSWR is 1.27, and the output VSWR is 1.18. Power added efficiency of 75% is attained at 1.75 GHz band about 3W to balanced amplifier.

• Journal of the Korean Society of Costume
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• v.66 no.8
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• pp.138-156
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• 2016

This study analyzed the effects of CEO's authentic leadership on job satisfaction and organizational performance in a fashion company, and the differences in the CEO's authentic leadership, job satisfaction and organizational performance by the size of the companies. The study analyzed responses collected from questionnaires filled out by 440 employees of fashion companies. The results of this study were as follows; First, the transparency, future orientation, self-awareness, balanced process, and ethicality of CEO's authentic leadership positively influenced the wages or system satisfaction. The CEO's transparency, future orientation, self-awareness, and ethicality positively influenced job satisfaction. Also, the CEO's transparency, future orientation, self-awareness positively influenced the working condition or environmental satisfaction. Second, the wages or system satisfaction and working condition or environmental satisfaction of employees positively influenced the management performance of fashion companies. And the wages or system satisfaction, job satisfaction and working condition or environmental satisfaction of employees positively influenced the new product performance and job performance. Third, the CEO's authentic leadership of fashion companies positively influenced the management performance, and the CEO's transparency and future orientation positively influenced the new product performance. In addition, the CEO's self-awareness, balanced process and ethicality influenced the job performance. Fourth, there were significant differences in the CEO's authentic leadership, job satisfaction, management performance and new product performance by fashion companies' size. The results of this study will be useful in successful business strategy and improving the performance of fashion companies.