• Journal of the Korea Convergence Society
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• v.8 no.12
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• pp.283-289
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• 2017

In this study, a general program has been developed to calculate the static design factor of a vehicle suspension system. The partial derivatives of Jacobians for constraint equations are calculated using the symbolic technique. In the commercial program, finite difference method is used to calculate the Jacobian matrix of Jacobian. But in this study, it is calculated by using the symbol calculation method to precisely consider it. The calculated Jacobian matrix for the system has proved its accuracy through the solution of the numerical example. A simulation was performed for a double wishbone suspension of a 1/4 vehicle. The result can be used to calculate the static design factor of the suspension, and also add a convergence module that can perform virtual tests.

• Journal of the Korean earth science society
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• v.31 no.1
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• pp.1-7
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• 2010

Many studies have successfully developed a number of terrain correction programs in gravity data. Furthermore, terrain data that is a basic data for terrain correction has widely been provided through internet. We have also developed our own precise gravity terrain correction program. The currently existing gravity terrain correction programs have been developed for regional scale gravity survey, thus a more precise gravity terrain correction program needs to be developed to correct terrain effect. This precise gravity terrain program can be applied on small size geologic targets, such as small scale underground resources or underground cavities. The multiquadric equation has been applied to create a mathematical terrain surface from basic terrain data. Users of this terrain correction program can put additional terrain data to make more precise terrain correction. In addition, height differences between terrain and base of gravity meter can be corrected in this program.

• Archives of design research
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• v.13 no.4
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• pp.33-41
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• 2000

More recently, the ecocide like an environmental shocks of acid rain, oil spills and now the ozone layer have driven home the fact that we're all responsible for looking after our natural environment and threaten the our right to live. At such a situation enterprises has been to develop techniques of enhancing environment friendly design. However it is difficult to producing environment friendly product - especially at electronic product like a high accumulated thing and produced with a small amount - while they know the importance of environment. Because of a direct and actual disadvantage of enterprise and customer. Moreover it is rare and negative for physical point that an adaptation case of recycled material or natural one for designing. Therefore it is important to positive consideration and action of design process for the nature. In this paper the focus of interest is find out the active and real environmental friendly design practice scheme as a designer and understanding of basic of the environmental friendly design for a coexistence of the enterprise, customer, and environment.

• Journal of Korean Society of Transportation
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• v.28 no.6
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• pp.99-108
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• 2010

Due to the recent emergence of global warming concerns, the UN has made the issue of climate change its top priority. Accordingly, Korea has announced a new national master plan titled, 'Participation in global efforts in climate change through -Low Carbon, Green Growth-'. As part of the plan, the constructions of bicycle path networks are being pushed forward. Although the building of bicycle paths and infrastructure is being implemented, little consideration has been given for bicycle path signage. This essay is the study of methodology in the installation of signs on bicycle paths. The research includes a theoretical study of the standard and installation position of signs with consideration of the geometry of bicycles as well issues such as the distance required for the bicyclist to recognize and understand the road sign and to take actions like stopping, In addition, experimental verification of the test results has been carried out. Also, the test on height of signs by changing the installation heights according to a bicyclist's forward vision angle has been conducted.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.24 no.10B
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• pp.1937-1945
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• 1999

In paper, we propose a 3D polygonal mesh simplification technique based on vertex clustering. The proposed method differentiates the size of each cluster according to the local property of a 3D object. We determine the size of clusters by considering the normal vector of triangles and the vertex distribution. The subdivisions of cluster are represented by octree. In this paper, we use the Harsdorff distance between the original mesh and the simplified one as a meaningful error value. Because proposed method adaptively determine the size of cluster according to the local property of the mesh, it has smaller error as compared with the previous methods and represent the small regions on detail. Also it can generate a multiresolution model and selectively refine the local regions.

• Journal of Korean Library and Information Science Society
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• v.44 no.4
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• pp.29-44
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• 2013

The Joseon Dynasty suffered a great loss from the Japan invasion of Korea in 1592. At that time so many precious books were plundered by Japanese Army. And that plundered books, now in Japan, include a lot of complete titles of the books were given by the Kings - the Naesabon (內賜本) - of the early Joseon Dynasty period. If we could find out the quantities and the contents of them, it could be helpful for studying the same books remained incompletely now in Korea. In this respect, understanding current situation of the Naesabon(內賜本) is an important subject of the Korean bibliographic and historical studies. The purpose of this study is finding out the current situation of the Naesabon(內賜本) now in Japan, especially published in 16th century.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.127-131
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• 2003

In this study, I intend to analyze to cultural phenomenon centering around a digital photo. Especially, I consider digital camera and digital photo's culture of N-generation by studying a case of digital camera's internet silt, DCINSIDE.COM A digital photo in daily life is one of the remarkable phenomenon of digital culture. Photography that is faster to understand and more familiar than letter leads 0 digital culture. Digital photo takes charge of a group at display phone with sound. N generation who is familiar to image takes with a digital photo in every ways of communication. Recently our communication culture use a image to new communication through digital camera and development of digital photo. Digital photo deeply comes into our ordinary life when we never recognize in advance. And it let us recognize a lot of changes and communication. In this point of time, it demand that we must have a responsible attitude for development of digital photographic culture.

• Nuclear Engineering and Technology
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• v.11 no.1
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• pp.1-20
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• 1979

Neutron inelastic scattering studies on polycrystalline hydrates, NaBr-2$H_2O$ and BaCl$_2$-2$H_2O$ have been performed to observe librational modes. Assuming all observed peaks are from the $H_2O$ librational origin, the weighted frequency distribution functions are obtained by eliminating the contributions from the higher order processes. All of theoretical frequencies obtained using FG matrix method are dus to highly mixed modes, and therefore the modes identified as significant $H_2O$ librationat modes from their large potential energy distributions are assigned to the observed peaks. The H-bond interactions are estimated using a modified Lippincott Schroeder potential function, and the applicability of the potential function to the H-bond with highly bent or bifurcated configuration is examined on the basis of the shape of $H_2O$ librational potential energies. Some discussions are given on the usefulness of introducing O-H…Y bending terms in addition to the H…Y stretching in similar frequency calculation in order to obtain more information on the nature of H-bond. Also the purity and symmetry properties of the $H_2O$ librational modes are discussed using group theoretical analyses.

• Parasites, Hosts and Diseases
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• v.32 no.2
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• pp.117-120
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• 1994

Two rare cases of human infection with parvum (dwarf) type of Diphyllobothnum Iatum [syn. D. panpum (Stephens, 1908)], were discovered in Korea. The first case was a 46-year old housewife, from whom a kind of pseudophyllidean tapeworm eggs was detected in the feces. She was treated with praziquantel and purged, and a complete strobila with scolex, 120 cm in total length, was recovered. She recalled that she had eaten raw trouts at a raw-fish restaurant near the Chungju Lake. Another patient was a 22-year old medical student (male), who used to eat raw sea-foods. He discovered a chain of tapeworm proglottids, 15 cm in length, discharged spontaneously in his stool and brought it for identification. The worms from the two cases were compatible with D. pan)urn (Stephens, 1908) of which the taxonomic significance has long been questioned. After a detailed morphological study and review of literature, we designated the worms as D. datum prom type. This is the first report on the occurrence of this rare type of D. lotunl infection in Korea.

• 한국해양학회지
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• v.12 no.1
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• pp.48-53
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• 1977

Various types of iron were determined in 5 meters interval from surface to bottom layers in Yeongil Bay water of Korea, late October 1973. The contents of every type of iron decreased outward from the inner part to the entrance of the bay. But there was not any difference in iron contents among the water masses. Particulate iron and ferric iron were lower in the entrance and central parts than in the inner parts of the bay. It seemed to be caused by turbidity. The concentration of soluble iron showed higher value at the area of entrance of harbour than those of any other stations. It suggests that there may be the origin of pollutants.