• Journal of Navigation and Port Research
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• v.26 no.1
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• pp.43-49
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• 2002

In this Paper, the mechanical behavior of two reかangular plates spot-welded under free vibration is investigated in detail. The focus of the analysis is to evaluate the effect of thickness of reinforced plates with equivalent thickness. The results of this the investigation are compared with detailed finite element analysis end experiments of the plates spot-welded for various parameters, such as aspect ratio, arm ratio, and distance ratio of spot-welding Points. The conclusion obtained are as followed. 1. The effect thickness due to spot-weld is very large, such as 55% in comparison with area ratio of spot-welding joint is just 4.52%. 2 The effect of thickness with respect to the distance ratio is maximized when the distance ratio is 0.4.

• Journal of the Korean Institute of Landscape Architecture
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• v.27 no.1
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• pp.1-10
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• 1999

There is no official landscape architectural organization in the current government organization in Korea. Therefore, it is necessary to establish the landscape architectural organization which will carry out the works of the special landscape architectural interest and create the new services with other interested government offices. The contents of the study are as follows; 1. A legal basis for the establishment of the landscape architectural organization is the demand for the introduction of the landscape architectural organization which has 5 types(urban planning, architecture, land register, land surveying, civil work) of the special groups to official organization by changing the 1 article of the Official Appointment Regulations. 2. Theories of law of equality for everyone(the Constitution of Korea : §11(1)), the rights of having pleasant residential life(the Constitution of Korea : §35(3)) and the national duty of employment increase(the Constitution of Korea : §32(1)) are reviewed to provide the legal reason of establishing the landscape architectural organization. 3. With the addition of new landscape architectural organization, it could expand the areas of landscape architects by adding of new landscape architectural subjects into official examinations for government employees. Also it is necessary to exempt the test for those who have licenses and to give additional points in evaluation their works at the end of year to the people who have licenses. 4. The reasons for the creation of new landscape architectural organization into the present official organization are acquired from the derivation of 23 present regulations referring to the landscape architects, the existence of the landscape architectural administrative departments belonging to the Metropolis of Seoul, and the favorable result of the questionnaire on the establishment of the new organization. Hereafter the lawyers should be cooperated with landscape architects to initiate the related principles of law, and it is necessary to analyze each text of the related laws in detail to establish the landscape architectural organization by means of the joint studies.

• Journal of Korean society of Dental Hygiene
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• v.7 no.4
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• pp.595-609
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• 2007

The purpose of this study was to classify the courses of the dental-hygiene curricula into several categories by field, to incorporate the subjects in the same category into an integrated course, and to suggest how to ensure the successful phase-in application of integrative education according to Ronald M. Harden's 11-stage integrative ladder model. The findings of the study were as follows: 1. When the existing curricula were analyzed, it's found that many credits were provided to the courses in the area of basic dentistry that offered both theory and practice. In particular, the subjects tested by the national examination were offered by every college. In the field of public oral health, the largest number of credits was allocated to theory of oral prophylaxis and practice courses. In clinical area, clinical practice, in the area of dental office management, dental insurance course was given the largest credit. There were 31 to 61 major subjects in the colleges, which indicated that the major subjects were segmented in detail. 2. It seemed necessary to incorporate the subjects in the field of basic dentistry into oral biology, and theory of oral prophylaxis/practice, preventive dentistry/practice, preclinical stage, emergency treatment and introduction to dental hygiene should be integrated in to clinical dental hygiene. The courses in clinical area should be combined into clinical dentistry, and in the field of medical management, dental insurance, hospital management and medical relation law should be incorporated into management of dental clinic. 3. In the 11-stage integrative ladder, the subjects in the same field could perfectly be incorporated as the stages advanced. Each of the subjects was less emphasized, and communication and joint plans among teachers who were respectively in charge of the courses were increasingly considered important. Specifically, there should be a consensus among the teachers in regard to the outline of teaching programs, order of education. objects and objectives of programs and what and how to evaluate.

• Journal of the Korean Society of Propulsion Engineers
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• v.10 no.3
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• pp.18-25
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• 2006

In order to perform system requirements quickly and accurately, an automatic design program of solid rocket motors(SRM) structure designated as the 'ProDes software' has been developed and verified. from given system design criteria and constraints, it has the capabilities to design, analysis, simulation and drawing process to greatly reduce the over 'design cycle time' and manpower of a project. The conception of the program is modular, and calculations are performed step by step allowing parametric design studies and providing final selected design goal. Each configurations of SRM components and joint types composed of various master models is obtained from the data base module of the library. Between the design results of the ProDes software and those of the previous detail design of the established motor showed good agreements.

• Journal of Digital Convergence
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• v.11 no.3
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• pp.189-197
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• 2013

Weak competitive Small Business are getting attention for their ability to enhance the brand power and marketing co-brand. Under these circumstances, in this study examined the operational status of the domestic co-branded. Also enable co-branding strategy was proposed. First, learn the various aspects of the concept of co-branding, and looked at the advantages and disadvantages of co-branding. Second, the type of co-branded partner combined, joint venture between companies Union type, a leading company driven and private companies and state agencies co-branded. Looked at the type of advantages and disadvantages of each. Thirdly, we presented the current status of the important co-branded domestic. Fourth, we examined the status of the Small and Medium Business Administration supports a co-branded Examined in detail by year look at the status of support for this type of co-branded Industry Distribution and co-branded interrupted. Finally, the short-term aspects and long-term perspective on the domestic co-brand activation strategy based on these materials are presented. The results of this study is expected to be the foundation of domestic co-branded business in the future to explore the ways to improve the system of government support will help to raise.

• Steel and Composite Structures
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• v.27 no.4
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• pp.495-508
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• 2018

In this paper, cyclic loading tests on composite frame inner joints of steel-reinforced recycled concrete (SRRC) column-steel beam were conducted. The main objective of the test was to obtain the shear behavior and analyze the shear strength of the joints. The main design parameters in the test were recycled coarse aggregate (RCA) replacement percentage and axial compression ratio. The failure process, failure modes, hysteresis curves and strain characteristics of the joints were obtained, and the influences of design parameters on the shear strength of the joints have been also analysed in detail. Results show that the failure modes of the joints area are typical shear failure. The shear bearing capacity of the joints maximally decreased by 10.07% with the increase in the RCA replacement percentage, whereas the shear bearing capacity of the joints maximally increased by 16.6% with the increase in the axial compression ratio. A specific strain analysis suggests that the shear bearing capacity of the joints was mainly provided by the three shear elements of the recycled aggregate concrete (RAC) diagonal compression strut, steel webs and stirrups of the joint area. According to the shear mechanism and test results, the calculation formulas of the shear bearing capacity of the three main shear elements were deduced separately. Thus, the calculation model of the shear bearing capacity of the composite joints considering the adverse effects of the RCA replacement percentage was established through a superposition method. The calculated values of shear strength based on the calculation model were in good agreement with the test values. It indicates that the calculation method in this study can reasonably predict the shear bearing capacity of the composite frame inner joints of SRRC column-steel beam.

• Journal of Korean Association for Spatial Structures
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• v.7 no.1 s.23
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• pp.71-78
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• 2007

Stainless steel is very famous for using of industrials structure and joint elements. Stainless steel wire drawing is one of the most ancient crafts. But there's not any standard size of tapered die during tile drawing. This paper was studied die angle and dimension of whole die by using AFDEX drawing simulator. Stress, metal flow and strain rate was analyzed by AFDEX tools during the wire drawing. So optimum data of during dies was taken from them. Simulation data was correspond with experimental data. The results of the optimum dies are shown that (1) Reduction angle is $13.8^{\circ}$ (2) Bark relief angle is $20^{\circ}$ (3) Bearing length is 0.7975mm (4) Bearing dia is 0.2393mm The research of the optimum result when the make dies is connected an enterprise. After researching, I hope that indirection effect creation make development situation of the manufactural technical, practical application of the other die size by the detail data, utility factor and economical efficiency.

• Journal of the Korean Institute of Landscape Architecture
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• v.25 no.1
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• pp.47-61
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• 1997

This study was conducted to grasp the present condition of the name and the related text of the domestic laws (97 statutes, 1 examination, 1 guide, 3 ordinances, 1 leading case) in force which were connected with landscape plant and planting. Examining the general tree-planting system of America, the related foreign laws(1 constitution, 44 statutes, 31 ordinances, 6 leading cases) were arranged in the name and the text and classified by nations of regional groups and it was considered to the mutual relation with lots of laws which are scattered with the various laws. To examine the points at issue of the related domestic laws and to study the related foreign laws, the remedies for the domestic laws being at issue were proposed. That is : A change of the landscape planting concept, the introduction of the landscape planting cost compared with the total construction cost, the unification of the landscape planting ordinances as the unit of city, the clarification of the completion period for the depect of the replaced trees. putting the conservation and production of the top soil under an obligation the adoption of a licence system for the tree planting within the river area, the introduction of the allotment system for landscape architectural expenses, the encouragement of making a hedge, the settlement for the problems of the trees loss compensation, the necessity for the quality test to the landscape planting works, the intensification of the punitive rules to the illegal felling and planting of the trees in the greenzone area, the application of the Labor Standard Act to the landscape planting laborers. The laws relating to landscape plant and planting are prescribed dispersedly in the many other related laws and it is concluded to be impossible for the legislation of the singular law which is applied uniformly to the department of the tree-planting. Hereafter it should be required to analyze concretely in detail the each text of the related laws by means of the joint studies between the professional landscape architects and the lawyers.

• Journal of Korean Society of Steel Construction
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• v.15 no.6 s.67
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• pp.629-637
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• 2003

This s paper presented the results of the three phases of fatigue tests to determine the fatigue strength of in-plane welded gusset joints, which are the most common details inevitably existing in the region of high stress range. A total of 57 fatigue specimens with varying thickness and strengths were made and tensile fatigue tests performed. One full-scale beam fatigue test was also performed. The validity of the fatigue strength of those details in the specification was confirmed, with the effects of thickness of flanges and welded attachments, length of attachments, and strength of applied steel examined. The characteristics of crack initiation and propagation were also observed. The test result was evaluated by comparing it with other test data and fatigue criteria of other countries. To determine the degree of stress concentration in the weld toe depending on geometric configuration such as attachment length and transition radius, analyses were performed. Compared to the present specification, analytical results indicate the need to revise and subdivide the detail categories.

• Computers and Concrete
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• v.24 no.5
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• pp.459-468
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• 2019

The stability and safety of concrete plug structure of diversion tunnel is crucial for the impoundment of upstream reservoir in hydropower projects. The ongoing Wudongde hydropower plant in China plans to adopt straight column plugs and curved column plugs to replace the traditional expanded wedge-shaped plugs. The performance of the proposed new plug structures under high water head is then a critical issue and attracts the attentions of engineers. This paper firstly studied the joint bearing mechanism of plug and surrounding rock mass and found that the quality and mechanical properties of the interfaces among plug concrete, shotcrete, and surrounding rock mass play a key role in the performance of plug structures. By performing geophysical and mechanical experiments, the contact state and the mechanical parameters of the interfaces were analyzed in detail and provide numerical analysis with rational input parameters. The safety evaluation is carried out through numerical calculation of plug stability under both construction and operation period. The results indicate that the allowable water head acting on columnar plugs is 3.1 to 7.4 times of the designed water head. So the stability of the new plug structure meets the design code requirement. Based on above findings, it is concluded that for the studied project, it is feasible to adopt columnar plugs to replace the traditional expanded wedge-shaped plugs. It is hoped that this study can provide reference for other projects with similar engineering background and problems.