• Journal of the Korean Operations Research and Management Science Society
• /
• v.30 no.2
• /
• pp.1-11
• /
• 2005

The network structures of a hyperlinked environment can be a rich source of information about the contents of the environment and it provides effective means for understanding it. Recently, there have been a number of algorithms proposed analyzing hypertext link structure so as to determine the best authorities for a given topic or query. In this paper, we review the algorithm of mutual reinforcement relationship for finding hubs and authorities from World Wide Web, and suggest SHA, a new approach for link-structure analysis, which uses the relationships among a set of relative authoritative pages, a set of hub pages, and a set of super hub pages.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2010.05a
• /
• pp.19-20
• /
• 2010

Post-tensioning is an effective way to reduce both the depth and reinforcement contents for the reinforced concrete member. In this research, we applied post-tensioning to transfer slab in shear wall type apartment building to reduce depth and reinforcement of transfer slab.

• Proceedings of the Korean Society of Agricultural Engineers Conference
• /
• 2000.10a
• /
• pp.471-476
• /
• 2000

Long-term behavior of reinforced clayey soil by model tests were performed to investigate the effect of reinforcement during loads and under static loads. In order to determine proper contents by weight of monofilament polypropylene fiber and calcium carbonate, the drying shrinkage and compressive strength tests had been conducted before model tests. Model tests were run on a clayey soil mixed with or without reinforcement and test specimen in test apparatus was placed in air dry for 7days before load application. In the case of fiber reinforced soil, the horizontal strain was lower than others during loads because the presence of fibers increased the soil's resistance to deformation. All of reinforced clayey soil, horizontal strain decreased as the water content decrease under static loads.

• Electronics and Telecommunications Trends
• /
• v.38 no.4
• /
• pp.104-115
• /
• 2023

Communication for multiagent reinforcement learning (MARL) has emerged to promote understanding of an entire environment. Through communication for MARL, agents can cooperate by choosing the best action considering not only their surrounding environment but also the entire environment and other agents. Hence, MARL with communication may outperform conventional MARL. Many communication algorithms have been proposed to support MARL, but current analyses remain insufficient. This paper presents existing communication algorithms for MARL according to various criteria such as communication methods, contents, and restrictions. In addition, we consider several experimental environments that are primarily used to demonstrate the MARL performance enhanced by communication.

• Journal of the Society of Disaster Information
• /
• v.9 no.3
• /
• pp.315-323
• /
• 2013

Recently, FRB is being used more as reinforcement of RC beam thanks to its material advantages in construction industry. The external attachment reinforcement of FRP is a construction method with advantages such as high strength, stiffness, excellent durability and construction practicability, despite of its weight. However, the reinforcement has a disadvantage to cause damage on permanent structure as its structure is water-tight by low water permeability reinforcement, preventing water from draining outside. The study attempted flexural failure test for GP of which material properties are equally same as the existing FRP and that with permeability, shows good binding with the concrete structure, durable performance and durability, comparably analyzing the improvement of durability and ductility according to changes of fiber contents of composite strip.

• Journal of the Society of Disaster Information
• /
• v.9 no.3
• /
• pp.290-299
• /
• 2013

This study is to present an improvement of security for the National Assembly by survey of persons who use the National Assembly facilities. Most of respondent said that their security consciousness level is above average, and they know National Assembly building is National Major Facility First class but they did not know well what the Major Facility First class is. Many of respondents thought security design of National Assembly building is inadequate, so reinforcement of access control management is necessary. For reinforcement of access control management, security gate and preparing of some obstacles are required. They said that they could put up with inconveniences incurred as a result of reinforcement of access control management, that could be affected positively for the reinforcement. The recognition on the necessity of security education is high, but there is no proper security education program. For practical security education, contents and different method followed by different facilities user should be considered.

• Geotechnical Engineering
• /
• v.12 no.5
• /
• pp.137-154
• /
• 1996

Pull-out tests for three different types of strip reinforcements are performed to investigate variation of the apparent coefficient of friction which occurs between the reinforcements and the weathered granite soils with different contents of fine materials. The contents of fine materials for the soil sample are varied from 7% to 36% and the reinforcements used for the pullout tests are smooth, ribbed steel strips and a textured shape Paraweb 1 Friction tie. Test results show that the apparent coefficient of friction tends to decrease with the increase of the content of fine meterials. It is known, however, that the minimum apparent coefficient of friction required to the design of reinforced earth structures can be achieved even at 35% fine contents by using appropriate reinforcements. The ribbed strip reinforcement is found to be the most effective in mobilizing the apparent friction when interacting to finer weathered granite soils. The textured reinforcement is also useful for 35% fine con tents if the textured depth is increased.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1999.10a
• /
• pp.759-762
• /
• 1999

The concrete structures possessing good structural integrity can face durability problems due to deteriorations of concrete structures under various environmental conditions. The durability problems weaken the structural integrity in the long run. Especially, the excessive use of sea sand causes serious reinforcement corrosion and carbonation in concrete structures. An accelerated test is often used to predict deterioration as a qualitative measure, but without long term exposure test results or understanding of the relationship between the accelerated test and the long term exposure test, the accelerated test result alone can not be used effectively as a quantitative measure. In this paper, a methodology is proposed to predict the long term deteriorations, based on the result of the short-term accelerated test, of concrete containing different contents of chloride ions. Then, the correlation between two results on the steel corrosion ratio and the carbonation depth is analyzed for concrete with different chloride contents.

• Perspectives in Nursing Science
• /
• v.9 no.2
• /
• pp.61-70
• /
• 2012

This article describes the development, evaluation and dissemination of biological nursing (bionursing) science courses established in Korea. Prior to this innovation the subject such as anatomy, physiology, biochemistry, microbiology, pharmacology and pathology were taught by non-nursing faculties, such as basic medical science faculty members. And it often did not meet and satisfy the needs of most undergraduate nursing students. To meet these needs, we have developed four bionursing courses by overhauling individual courses and integrating these by creating new titles, objectives, and contents. In this process, the Korean Society of Biological Nursing has made enormous efforts to standardize the contents of the courses and to develop standard syllabus of four bionursing subjects. This article also suggests for further development of bionursing science such as enhanced linkage of the contents of bionursing science courses with clinical practice, reinforcement of teaching competency of professors, and activation of researches using various biological measurement to provide concrete evidences for nursing practice.

• Journal of the Korea Institute of Building Construction
• /
• v.11 no.2
• /
• pp.127-135
• /
• 2011

In this study, the engineering characteristics of outer wall insulation panels according to type of insulation materials, their combination, and the contents of insulation materials were tested. Vermiculate, ceramic bead, perlite and expanded polystyrene were used as insulation materials. Flexural strength and thermal conductivity depending on the insulation materials used were measured. It was found that the flow of fresh mortar significantly decreased with an increase in the contents of insulation materials. In terms of the effect of insulation materials on thermal conductivity, an increase in insulation materials resulted in a decrease of thermal conductivity. In particular, PL and EPS, when used together, have lower thermal conductivity than other materials. Regarding the flexural strength of the hardened mortar, the strength showed a tendency to gradually decrease according to the increase in contents of insulation materials, compared to that of the plain mortar. In terms of the flexural strength depending on various types of insulation materials and its combination, it was found that the flexural strength of cement mortar containing 3% of vermiculate(V)+ceramic bead(CB)+perlite(PL) was the highest among the specimens tested.