• The Korean Journal of Air & Space Law and Policy
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• no.spc
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• pp.105-135
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• 2007

The Convention on International Interests in Mobile Equipment and the Protocol to the Convention on International Interests in Mobile Equipment on Matters specific to Aircraft Equipment were adopted on 16 November 2001 at a diplomatic conference held in Cape Town under the joint auspices of UNIDROIT and ICAO. The entry into force of the Cape Town Convention and Protocol have occurred on 1 March 2006. The Cape Town Convention and Protocol provides an international legal regime for the creation, perfection and priority of security, title retention and leasing interests in aircraft equipment, which will be underpinned by an international registry. The purpose of this paper is to explain the objectives and principles of the Cape Town Convention and Protocol, to review the provisions relating to the international interests in aircraft equipment and international registry for their protection under the Cape Town Convention and Protocol, and to discuss the Issues on Korea's accession to the Cape Town Convention and Protocol. As the anticipated results of this paper, it will contribute to facilitate the financing of the acquisition and use of aircraft equipment of high value or particular economic significance in an efficient manner, and to save very large sums of money annually in financing charges, also the international interests in aircraft equipment will be recognized and protected universally.

• Journal of the Korean Society of Safety
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• v.15 no.2
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• pp.111-117
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• 2000

In this study, the bearing capacity behavior of strip footing located above a continuous cavity in sand was investigated experimentally. The model footing test was performed in a model box made by using raining method in sand. The model footing test results were compared with those obtained from theoretically proposed equations. The results of the analysis indicate that there is a critical region under the footing. For strip footing, there exists a critical depth below which the presence of the cavity has negligible influence on the footing performance. Only when the cavity is located within this region will the footing performance be significantly affected by the presence of the cavity. The size of the critical region depends on several factors such as footing shape, soil property, cavity size and cavity shape. When the cavity is located within the critical region, the bearing capacity of the footing varies with various factors, such as the size and location of the cavity and the depth of foundation. Based on the experimental study, the following conclusions were induced. 1. The ultimate bearing capacity due to the eccentricity of a underground cavity increases at the rate of the small rather than that due to the depth of a underground cavity. This indicates that the bearing capacity of a strip footing is influenced on the depth rather than the eccentricity of a underground cavity. 2. The critical $depth(D/B)_{cr}$, by underground cavity in sand soil ground that is made by the relative density($D_r$)=55%, 65%, 75%, approaches a range of about 8~10 in case of W/B=1, and about 11~13 in case of W/B=2. 3. In case of the relative density($D_r$) 75%, the most outstanding differential settlement trend is shown in the depth of 4~8cm regardless of the size of cavity, namely, when the value of D/B is 1~2. Therefore, a underground cavity influences on not only the decrease of the bearing capacity but also the differential settlement of a strip footing.

• Journal of the Korean GEO-environmental Society
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• v.15 no.9
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• pp.87-92
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• 2014

The Ground anchor is reinforcement to resist pull-out through ground that is used supports structure. The pull-out resistance of anchor is constructed by skin friction resistance from compression borehole wall in expanded wings and bearing pressure from the ground. Especially, underreamed ground anchor is reinforcement that adopts active reinforcement to prevent deformation of ground using bearing resistance generated reaming anchorage. This study is conducted to calculate bearing resistance of underreamed ground anchor. Realistic model tests were fulfilled to determine bearing resistance of anchor, and correlate results of tests to Uniaxial Compressive Strengths (UCS) of ground models that assumed weathered rock condition in 8 case. In a comprehensive series of the tests, the bearing resistances were measured by pull-out tests. The bearing resistances derived from tests have a linear correlation with UCS. We also suggest empirical equation between bearing resistance and UCS of rocks by single linear regression analyses. In test results of this study, the bearing resistances were evaluated approximately 13 times higher than UCS of the grounds, and it is qualitatively similar to numerical values of pull-out force derived from theory.

• Journal of the Korean GEO-environmental Society
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• v.15 no.9
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• pp.69-75
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• 2014

Rock fall protection system installed against rock slope is one of the most conventional way to protect nearby infra structures. Despite of wide application of typical rectangular nets, virtually installed to protect rock slope face, several problems have also been pointed out up to date. Rectangular draped nets are vulnerable to a sudden external shock such as rock fall, because it doesn't have any systematical buffers or shock absorbers. Furthermore, it has been widely recognized from the some cases of rock fall accident in Korea that rock fall protection nets cause wide range of failure in the rock slope faces due to insufficient pullout bearing capacity of fixing parts. Therefore, in this study, we tried to make a consideration about the problems of existing standard rock fall protection nets in Korea, and develop a new type of hexagonal net with a shock absorber based on design rock fall energy. In this paper, laboratory and full scale test procedure is described to analysis the performance of newly developed hexagonal rock fall net, and the key results are presented and discussed.

• Journal of the Korean Geosynthetics Society
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• v.8 no.2
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• pp.47-54
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• 2009

The ballast track, the most common type of conventional railroad track in Korea, is deteriorated by abrasion of ballast, it's penetration into roadbed, and rugged surface of roadbed caused by cyclic loading of train. Persistent occurrence of those phenomena lead to insufficient drain capacity, one of major factors in track design, and it increases pore water pressure and decreases of shear strength under rainfall condition leading to unstable roadbed. In this study, cylindrical model tests are executed for 3 types of geotextile applying cyclic loading in order to observe the characteristics of displacement and bearing capacity of geotextile, and undrained condition has been applied for 0 day, 3 days and 7 days to each geotextiles. The results showed that there was about 1% difference at the final displacement rates between reinforced soils and nature soils and the displacement of the ground surface increases along with the degrees of the saturation. And in case that water contents exceeds the threshold, it is also apparent that weight and tensile strength of geotextile influences displacement of the ground surface. And the larger weight of geotextile is, the smaller plastic displacement. It is evaluated that non-woven fabric comes into effect on reducing the bearing capacity but, the weight of geotextile has little influence on it.

• Journal of Korean Tunnelling and Underground Space Association
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• v.14 no.5
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• pp.485-501
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• 2012

This study aims to experimentally investigate ground settlement and ground movement around the square pipe by its penetration in sandy ground. A series of laboratory model tests were carried out with a small-scale auger equipment for penetration of a square pipe as well as a newly designed test box with a sand raining equipment. From the experiments, it is shown that a square pipe induces ground movement evenly around it in a low overburden condition. However, as the overburden becomes higher, ground movement by a square pipe is concentrated mainly above it. Especially, horizontal strain above the square pipe was mainly dominated by its penetration. In addition, sand surface movement is the smallest in case of the dimensionless penetration rate equal to 0.2. When its penetration rate of the square pipe is fixed, the rotation speed of auger controls surface movement whether it is settlement or heaving. Therefore, the selection of an optimal dimensionless rate for the square pipe is a key design factor to minimize ground settlement in a trenchless construction.

• The Journal of the Korea Contents Association
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• v.10 no.3
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• pp.454-462
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• 2010

The current curriculum in the 7th informatics, which simply highlights the use of applied programs rather than enhancing creativity through learning several principles in information science and thus making it hard to have optimism on the future as a powerhouse in IT. By diagnosing these problems, Education Ministry revised the existing curriculum to have a more scientific access to the informatics. However, the curricular revision fails to meet the needs of learners sufficiently because it tends to put the considerations of theoretical specialists before the learners them selves. This paper compares and analyzes the overall understanding of learners on informatics, current-curriculum and 7th revised curriculum and that of college-level, thus offering the student-centered one. Also, the research tries to bridge the opinion gap between developer and learner by looking into the understanding level of university majors about the current curriculum. In doing so, thesis may provide the basis on exploring new approaches and contribute to establishing 7th revised curriculum in school.

• Journal of Distribution Research
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• v.16 no.5
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• pp.211-231
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• 2011

RYUTSUKEIRETSUKA(Vertical Marketing System) developed by the Japanese Leading Manufacturers began to turn weak with the presence of the large- scaled retail enterprises since 1980’s. Therefore the alliances between major manufacturers & large distributors that were in the conflict relations for a long time began to progress. In accordance with this change in the distribution channel practice, the stance of the distribution channel theory in Japan had also changed. As the normative researcher group who had been critical to RYUTSUKEIRETSUKA and sympathetic to the task of merchant judged that it would disappear sooner or later, they considered positively the alliances between major manufacturers & large distributors which the latter were in dominant position. On the other hand, even the empirical researchers who supported the affirmative function of RYUTSUKEIRETSUKA changed their standpoint. They recognized the new channel practice, in other words the vertical alliances between the power companies, would be the frontier of research in accordance with the impetus of positivism in terms of the Marketing methodology. Thus, researchers of distribution channel theory in Japan who supported the normative approach become few and even changed to hurry to absorb in the empirical research, while moving the main focus of the research from RYUTSUKEIRETSUKA to the Alliances. In the long run, the distribution channel theory which was regarded as the leading principle of the Japanese Marketing has just made the methodological paradigm shift. The author suggests a critical viewpoint against the current Japan’s academism with the assumption that RYUTSUKEIRETSUKA has negative aspects.

• The Journal of the Korea Contents Association
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• v.20 no.2
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• pp.534-546
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• 2020

The purpose of this study is to prove the positive effect of mind and body healing through the modified meditation method of Southern Buddhism as a systematic practice to concentrate or empty consciousness of the Buddhist temple in Dhammakaya, Thailand. To investigate the effects of the program on the participants, the experimental measurement tools in this study include the Immeasurable scale, spirituality scale, simple mental test scale, and blood pressure scale, pulse meter, thermometer, and recorder. When the measured values were compared with the corresponding t-test, there were some differences before and after the measurements based on the significance probability p <0.05. As a result, there was a significant correlation between spiritual support scale and the Immeasurable scale. In addition, the results of analyzing the data through interviews showed that the body and physiologically effective concentration was well after the meditation experience, and the intention to actively utilize this meditation method was confirmed. In this study, it was confirmed that there was a positive effect of the Samata practice method of Concentration meditation(CM), and thus the theoretical and experimental effects of intensive meditation were presented. I hope that these studies will accumulate and follow-up studies will be conducted through intensive meditation as a healing effect.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.6
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• pp.465-475
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• 2018

The purpose of this study was to explore predictors of positive changes in children with divorced parents and to demonstrate the structural path among the perceived experience of social discrimination, parenting difficulties, parent-child communication, and internet use of children that related to positive changes based on family incomes. The subjects for this study were 1,114 single parents from divorced families sourced from a study on the status of single-parent families in 2015. The results of this study by using the structural equation model of the moderating effect verification with family incomes and multi group analysis are as follows. First, single-parent's perceived experience of social discrimination turned had a significant positive effect on parenting difficulties( =.354) and children's internet use ( =.234). Single-parent's perceived parenting difficulties also had a significant positive effect on children's internet use ( =.440) but a significant negative effect on both parent-child communication( =.192) and positive changes of children( =.218). Interestingly, internet use of children demonstrated a significant negative effect on their positive changes. Second, parent-child communication, parenting difficulties, and children's internet use had a negative mediating effect with the relationship where single-parent's perceived experience of social discrimination had an effect on positive changes of children( =.167). Second, between the family groups based on family incomes, there was no statistically significant difference in the structural relationship. Based on these results, this study presented a practical proposal to help single parents not experience social discrimination and to help decrease the internet use of children to improve positive changes.