• Composites Research
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• v.29 no.2
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• pp.79-84
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• 2016

An adhesive can be used to connect two different materials in structures. In comparing with other connecting methods, such as bolt, rivet, and hot melting, the adhesive does not need to use them. It leads to reduce the weight and decrease the stress concentration along the connecting line. This work studied the comparison of mechanical and interfacial properties of commonly-used two adhesives, acrylic type and bisphenol-A epoxy type. Tensile and flexural strength of neat adhesives were also compared. Lap shear test of two adhesives was deduced from the measurement of tensile and fatigue tests. After testing, the failure patterns of adhesive surfaces were observed by a microscope. Tensile strength and mechanical fatigue resistance at using bisphenol-A epoxy adhesive were better than acrylic adhesive. Also adding CNT reinforcement in epoxy adhesive can anticipate mechanical improvement.

• Investigative Magnetic Resonance Imaging
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• v.4 no.1
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• pp.14-19
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• 2000

Purpose : This study was to present the functional brain mapping of both functional magnetic resonance imaging(MRI) and transcranial magnetic stimulation(TMS) in a case of schizencephaly. Materials and methods : A 28-year-old man, who had left hemiplegia and schizencephaly in right cerebral hemisphere, was exacted with both functional MRI and TMS. Motor function of left hand was decreased whereas right hand was within normal limit. For functional MRI, gradient-echo echo planar imaging($TR/TE/{\alpha}$=1.2 sec/90 msec/90) was employed. The paradigm of motor task consisted of repetitive self-paseo hand flexion-extension exercises with 1-2 Hz periods. An image set of 10 slices was repetitively acquired with 15 seconds alternating periods of task performance and rest and total 6 cycles (three ON periods and three OFF periods) were performed. In brain mapping, TMS was performed with the round magnetic stimulator (mean diameter; 90mm). The magnetic stimulation was done with 80% of maximal output. The latency and amplitude of motor evoked potential(MEP)s were obtained from both abductor pollicis brevis(APB) muscles. Results : Functional MRI revealed activation of the left primary motor cortex with flexion-extension exercises of healthy right hand. On the other hand, the left primary motor cortex, left supplementary motor cortex, and left promoter areas were activated with flexion-extension exercises of left hand. In TMS, magnetic evoked potentials were induced in no areas of right cerebral hemisphere, but in 5 areas of left corebral hemisphere from both abductor pollicis brevis. Latency, amplitude, and contour of response of the magnetic evoked potentials in both hands were similar. Conclusion : Functional MRI and TMS in a patient with schizencephaly were successfully used to localize cortical motor function. Ipsilateral motor pathway is thought to be secondary to reinforcement of the corticospinal tract of the ipsilateral motor cortex.

• Journal of Korean Tunnelling and Underground Space Association
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• v.8 no.4
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• pp.365-375
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• 2006

The structural analysis for the secondary lining of tunnels is generally performed by a frame analysis model. This model requires a ground loosening load estimated by some empirical methods, but the load is likely to be subjective and too large. The ground load acting on the secondary lining is due to the loss of the supporting function of the first support members such as shotcrete and rockbolts. Therefore, the equilibrium condition of the ground and the first support members should be considered to estimate the ground load acting on the secondary lining. Ground-lining interaction model, shortly GLI model, is developed on the basis of the concept that the secondary lining supports the ground deformation triggered by the loss of the support capacity of the first support members. Accordingly, the GLI model can take into account the ground load reflecting effectively not only the complex ground conditions but the installed conditions of the first support members. The load acting on the secondary lining besides the ground load includes the groundwater pressure and earthquake load. For the structural reinforcement of the secondary lining based on the ultimate strength design method, the factored load and various load combination should be considered. Since the GLI model has difficulty in dealing with the factored load, introduced in this study is the superposition principle in which the section moment and force of the secondary lining estimated for individual loads are multiplied by the load factors. Finally, the design method of the secondary lining using the GLI model is applied to the case of a shallow subway tunnel.

• Korean Journal of Agricultural Science
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• v.23 no.1
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• pp.13-24
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• 1996

The following results were obtained by analyzing the displacement, strain and stability of ground at the soft ground excavation using sheet pile. 1. Before setting the strut, the horizontal displacement was large on the upper part of excavated side, but after setting the strut, it showed concentrated phenomenon while being moved to go down to the excavated side. 2. After setting the strut, the displacement of sheet pile was rapidly decreased about a half compared with before setting the strut. The limitation of excavation depth was shown approximately GL-8m after setting double stair strut. 3. Maximum shear strain was gradually increased with depth of excavation, and local failure possibility due to shear deformation at the bottom of excavation was decreased by reinforcement of strut. 4. Maximum horizontal displacement of sheet pile at GL-7.5m was shown 0.2% of excavation depth in elasto-plastic method, and 0.6% in finite-element methods, and the maximum displacement was occurred around the bottom of excavation. 5. To secure the safety factor about penetration depth in the ground of modeling, D/H should be more than 0.89 in the case of one stair strut, and more than 0.77 in the case of double stair strut. 6. The relation of safety factor and D/H about the penetration depth was appeared, Fs=0.736(D/H) + 0.54 in the case of one stair strut, and Fs=0.750(D/H) + 0.62 in the case of double stair strut.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.29 no.5
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• pp.447-454
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• 2016

In the meantime, looking at the present status of how to estimationte the quantity of rebar based on 3D BIM getting the limelight in these days, commercial BIM tools provide rebar modeling functions however it takes a vast amount of modeling time for modeling of rebar in use of that function hence there is no BIM software at present for practical use. Therefore, in this study, we organized and presented a practical rebar quantity estimationtion process in BIM-based design work-site and intended to develop a program named Rebar Automatic Arrangement Program - hereinafter called RAAP - which enables automatic rebar arrangement based on much more precise cross-sectional information of bars in column, beam, slab and wall than the one from existing 2D method under the conditions without any cross-sectional information in the initial design phase. In addition, we intended to establish rebar quantity estimationtion process in the initial design phase through interworking of modeling & quantity estimationtion functions in consideration of joint, anchoring length of BuilderHUB as a BIM software with RAAP. The results from this study are practical in developing a technology that is able to estimationte quantity with more improved reliability than the one from existing 2D-based methods with less effort when the quantity of framework is estimationted in the uncompleted state of cross-sectional design for structural members in the initial design phase of a construction project. And it is expected that it could be utilized as a basic study from which a reasonable quantity estimationtion program can be established in the initial design phase.

• Journal of Families and Better Life
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• v.20 no.4
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• pp.37-52
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• 2002

This study is preliminary study of the status of school counseling and demands for service at middle and high schools from universities to provide the youth middle and high schools in Changwon with counseling and educational service. The results of this research are below, First, the excessive workload became the most difficulties for operateschool counseling systems and counseling activities. Second, school counseling activities focused mainly on the formal and narrow areas of counseling such as career guidance, personality programs and intelligence test and so on. Third, the most problems which we have counselled, were friendship problems in the personal relationship, school absences in the delinquent, lack of information of sex in the sexual field, conflicts with Parents, in the family relationship, poor academic progresses in the academical and future directional problems and. character of personality difficulties in the psychological field. Fourth, the major offers from the teachers to counsel students in the school were advices, suggestions, career guidance, Preventative activities, and providing information through school counseling. Fifth, though the middle and high schools were in need of outside institutions related to counseling, It was difficult to get help because of being Ignorant of procedures or methods for using counseling and being lacking in enough information on such organizations. Sixth, ordinary students and students in danger of maladjustment besides problem students wanted to get a lot of help. Seventh, the counseling which are the most wanted from out of school was an opposite-sex relationship in the personal relationship, a lack of information on sex in the sexual fields, conflict with parents in the family problems, a strong unwillingness of study in the academical and future directional fields, and personalty difficulties In the psychological fields. Eighth, the subjects wanted to get counseling and educational service in regard to sex, addiction to PC, smoking, and ostracism and so on in counseling and education for young people. Ninth, education designed to have an adequate understanding of children turned out to be mostly needed as educational programs for parents Based on the above results, the proposals from universities for provide youth counseling and educational services are below. 1) setting up the positive publicity strategies E) developing and execution of various counseling and educational programs 3) expanding the counseling and education from maladjusted students to general students 4) expanding youth counseling and education to parental education and family counseling 5) continuous human resources improvement and training 6) reinforcement relationships with middle and high school organizations 7) building cooperation with local counseling organizations

• Journal of the Korean GEO-environmental Society
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• v.10 no.7
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• pp.151-158
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• 2009

In the early 1990s, soil nailing was first introduced as method of reinforcement for the slope stability and ground excavation, and as its application was increased the improved soil nailing was also developed. Most recently used for grout soil nailing greatly improve the methods and techniques for self-improvement techniques are classified as soil nailing. As the representative for the grout pressure method to improve the join method pressure grouting and improved method for the self-drilled soil nailing, removable soil nailing, upward soil nailing combined with horizontal drainage system. This paper is to compare upward soil nailing combined with horizontal drainage system with downward direction of the soil nailing. In order to study the limit equilibrium slope stability analysis and comparison with factor of safage, excavation for the vertical displacement for comparison with continuous analysis. According to this study, safage factor is decreased considerably using limit equilibrium analysis and makes no odds for the horizontal displacement when soil nail was installed upward.

• Journal of Korean Clinical Health Science
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• v.2 no.1
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• pp.59-71
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• 2014

Purpose. Medical tourism is recently becoming a new industry with great growth potential. The South Korean government is shifting medical tourism from simple cultural tourism to a high value-added industry with a new paradigm. Methods. The government has been providing positive support and marketing policies since the introduction of the article concerning foreign patient attraction to the medical law in 2009, and various types of medical institutions around the country has participated actively in medical tourism by themselves or in cooperation of government bodies and made increasingly greater performance. Results. This study obtained the following results. The medical institutions in Korea have been making efforts to see more development and profitability in diverse ways, including medical tourism for foreign patients and the advance of the Korean medical institutions into foreign markets. However, many local governing bodies and medical institutions participating in medical tourism around the country have primarily focused on examination and treatment on the basis of foreign patients' visit to South Korea and rarely built a medical network with other countries directly for medical tourism. This study presents a case of building a local medical network and a network for international medical tourism successfully on the basis of the local medical association, CMP, which has been formed naturally in Busan. The success factors for CMP included 1) enthusiasm of the official in charge; 2) the medical level, the service level, and open-mindedness of participant medical institutions; 3) cost efficiency due to executive office management with no costs, no conflicts, and constant partnership; 4) security of non-competitive expertise for participants; 5) local factors of CMP; 6) participation of good agencies; 7) reinforcement of participation networks; and 8) post facto management and local doctor management. Conclusions. Its positive effects included patient introduction and greater profitability on an internal basis as well as construction of the collaboration system with the institutions related to medical tourism and confidence. However, there are some limitations: it is still difficult to predict performance due to the short period of their activities, and it is necessary to continue to observe their constant activities since a single medical association was involved.

• The Journal of the Korea Contents Association
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• v.13 no.11
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• pp.106-118
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• 2013

I discussed how the Zen training could be used to previous acting training methods focused on the way draw efficiently subconsciousness in the process of the training of actors. It is believed that the practice of the Zen would contribute to the development of training subconsciousness of actors. I examined the validities of the Zen practices which could be helpful to young students and existing actors' training processes and started from the existing proven analyses of mental and psychological effects of it. It is certain that the practices of Zen is a new continent which has infinite possibilities of analyzing and studying in terms of thinking highly of the Zen and brain science together. If we would utilize the Zen efficiently in the course of training actors, we could achieve four elements: the first, a trigger to operate actors' subconsciousness, the second, establishing the presence of actors through the reinforcement of concentration, the third, overcoming any mental and psychological obstacles, and the fourth, the establishment of transformation skills through the combined use of left and right brains. Additionally, actors could have mental and psychological stability through the Zen practice in their daily lives. I believe that we could also find a unique Eastern actor training way through vigorous and practical following analyses and practices which are based on the Zen tradition for training actors' subconsciousness and unconsciousness.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.10
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• pp.259-266
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• 2020

In this study, required drill bits and excavation methods were developed for an uneven drilling method that can solve the problem of performance degradation of rock bolts. The developed drill bit's excavation performance was verified using rock with a strength of 100 MPa or more. In addition, for the relative evaluation of the uneven excavation method, experimental specimens were prepared for models with and without irregularities, and tests were performed. As a result of the experiment, the model with unevenness exhibited an average critical draw resistance of 801.6 kN, which is about 1.7 times the value of 468.7 kN for the model without unevenness, thus confirming the effect sufficiently. Therefore, it is expected that the resistance performance will significantly increase despite an increase in the uneven hole diameter of 20 mm. In the future, the results of this study could be used as basic data when performing other studies using numerical analysis models and performance verification through experiments to obtain an optimized rock forming method.