• Management & Information Systems Review
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• v.17
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• pp.83-105
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• 2005

인터넷은 한국사회 전반에 많은 변화를 초래하였다. 인터넷이 빠르게 확산되어 2004년 말에 인터넷 이용자 3,000만 명 시대를 열었고 이동전화, 초고속 인터넷 등 새로운 정보기술이 보편적으로 활용되는 단계에 이르렀다. 그에 따라 개인 홈페이지가 커뮤니케이션의 새로운 수단으로 자리 잡았고, 이에 따른 새로운 네티즌 문화를 탄생시켰다. 사회문화적 측면에서 그동안 정보화가 창출한 가장 큰 변화는 조직사회의 변화, 교육환경의 변화, 문화생활의 변화를 들 수 있다. 인터넷이 조직사회에 미친 영향은 전통적인 연공서열식 피라미드형 조직구조가 새로운 네트워크형 조직으로 발전하였으며, 노동시장도 장소에 구애받지 않고 이동원격근무(mobile Office)로 발전하는 추세이다. 그리고 교육환경은 가상공간을 통한 다양한 교육정보 접근기회를 확대하고 있으며, 사람들의 사고방식, 생활양식, 가치관의 변화도 수반하고 있다. 반면에 인터넷 사회는 한국사회 전반의 변화와 함께 정보화의 역기능 현상도 다양하고 광범위하게 확산되고 있다. 인터넷이라는 온라인상에서 다양한 주제로 서로 만나고 정보를 교환하는 사이버 공동체(Cyber Community)는 온라인 공간에 한정되는 것이 아니라 현실공간으로 확장되어 나타나고 있으며, 인터넷 중독문제는 개인뿐만 아니라 가정과 사회에도 부정적 영향을 끼치고 있을 뿐만 아니라 안티사이트도 진정한 대안문화로 자리 잡지 못하고 인터넷의 익명성을 이용해 무차별적인 비방과 욕설이 난무한 과도기적 현상을 보이고 있다. 이제 인터넷은 한국사회의 모든 것과 깊은 관련을 맺는 매우 중요한 일부분이 된 것이다. 인터넷은 20세기 공학기술이 성취한 위대한 업적 중의 하나이다. 인터넷은 단순히 정보화 사회를 실현하는 것이 아니라 인간의 삶의 가치, 생활의 편익 등을 증대한다는 믿음 때문이다. 한편 현실은 여러 가지 역기능이 함께 나타나고 있다. '네티즌 윤리강령'까지 선포했지만, 진정한 네티즌 윤리는 강령을 선포했다고 저절로 확립되는 것이 아니다. 네티즌 각자의 실천의지가 있어야 한다. 인류가 새로운 이상향이라고 추구하는 가상사회는 윤리적인 사고와 행동으로 질서를 유지하지 못하면 인류의 밝은 미래는 보장할 길이 없다. 21세기 정보화 사회, 인터넷 사회를 맞이한 우리는 이 세상을 참으로 살기 좋은 세상으로 만들어야 할 고귀한 책무를 안고 있다. 아무리 험한 길, 어려운 과제라 할지라도 그 목표를 잃어서는 안 되며, 그 해답을 얻는 노력을 결코 게을리 해서는 안 된다.

• Journal of the Korean association of regional geographers
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• v.9 no.4
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• pp.592-607
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• 2003

This study on land use and regeneration of urban central district in Daegu investigates the current trend of those changes, and examines the change of urban core on land use, Since the 1980s, large cities in Korea have experienced the decline of spatial economic activities as well as population. Such urban decline has a relation with land use which can be classified with urban land use district and actual land use. This study tried to capture urban land use in three aspects; downtown business, residence, and the change of land use conversion. Based on land use characteristics, the size of residence land use has played a major role in hindering of the efficiency of land use. Also, this study has reviewed urban renewal projects in Daegu, especially urban core renewal projects, and discussed the problems of the projects.

• Journal of Astronomy and Space Sciences
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• v.11 no.1
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• pp.93-106
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• 1994

A three-dimensional box model has been developed to study the MHD wave coupling in the magnetosphere. In this model, the effects of the ring current are included by assuming the pressure gradients in the MHD equations. It is found that the axisymmetric ring current may play an important role in producing spectral noises in compressional waves, while field line resonances have no such disturbances. These results may explain the current observational characteristics that compressional cavity modes hardly appear in the satellite experiment, while field line resonances often occur. Our numerical resluts also suggest that any discrete spectral peaks such as the global cavity modes can hardly occur where the pressure distribution of the ring current becomes important. The continuous band of transverse waves is found to be unperturbed until the ring current becomes significantly asymmetric with respect to the dipole axis. In addition, our results in the absence of the pressure gradient are found to be consistent with the previous results from the box-like and dipole models.

• Journal of the Korean Geotechnical Society
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• v.19 no.5
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• pp.199-210
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• 2003

The development of strain localization within shear zones is frequently observed during soil deformation. In fact, the phenomenon appears to be more often the norm rather than the exception. Conceptually, any soil condition that renders negative work increment is prone to localization. In this study, a broad range of soil and loading conditions are investigated to test this criterion, including: dilative soil subjected to drained shear (standard case), contractive soil sheared under undrained conditions, cavitation in dilative soil in undrained shear, inhomogeneous soils, particle alignment in contractive soils made of platy particles, soils that experience particle crushing, and the shear of low-moisture and/or lightly cemented loose soils. Unique specimens and test procedures are designed to separately test each of these soil conditions in the laboratory According to experimental test results, soil specimens with post-peak strain softening behavior are prone to progressive failure, localization of deformations, and shear banding. The state of stress, the soil density, inherent mechanical and geometrical properties of soil particles, low water content, and heterogeneity can contribute to triggering strain localization. Considering all possible cases of localization, the best method to obtain the critical state line in the laboratory is to use contractive homogeneous specimens subjected to drained shear.

• Journal of the Korean housing association
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• v.20 no.3
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• pp.37-45
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• 2009

For the young period, privacy is a crucial factor in establishing one's own identities, values and relationships. The capacity of residential environment to protect individual's privacy takes considerable part in influencing psychological and physiological development of adolescents. This study analyzed adolescents residential values and the elements of spatial plans for the passage and outdoor in Apartment Design Competition of Suwon A district in 2008. One hundred and ten middle and high school students living in Metropolitan area were selected and questionnaire was conducted during February 7 to February 15 in 2009. The data was analyzed by SPSS 11.0 program using one-way ANOVA and crosstab. The study results were summarized as follows; First, the adolescents valued 'safety' the most, regardless of their age and gender and the safety of adolescents commuting should be considered. Second, protecting their own private territories was next important element among other elements. Privacy can be protected by using movable walls, changing the doorway, dividing parents' and adolescents independent territory. Third, in terms of convenience, choosing location of children's room and walking way should be considered. Forth, from the survey, demand for indoors leisure activity was highly valued and required for aesthetic point of view. Considering the sculptures and facilities must satisfy the aesthetics and practicality. Fifth, in terms of social needs, 61.6% of people answered positively to the community facilities for social relationship. Residential environment affects enormous part of adolescents emotional and academic development. Therefore, designing residential areas for adolescents friendly should reflect the demands for safety, territory, convenience, aesthetic and social life.

• Journal of the Korean Geotechnical Society
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• v.30 no.9
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• pp.67-75
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• 2014

Methane gas hydrate which is considered energy source for the next generation has an urgent need to develop reliable numerical simulator for coupled THM phenomena in the porous media, to minimize problems arising during the production and optimize production procedures. International collaborations to improve previous numerical codes are in progress, but they still have mismatch in the predicted value and unstable convergence. In this paper, FEM code for fully coupled THM phenomena is developed to analyze methane hydrate dissociation in the porous media. Coupled partial differential equations are derived from four mass balance equations (methane hydrate, soil, water, and hydrate gas), energy balance equation, and force equilibrium equation. Five main variables (displacement, gas saturation, fluid pressure, temperature, and hydrate saturation) are chosen to give higher numerical convergence through trial combinations of variables, and they can analyze the whole region of a phase change in hydrate bearing porous media. The kinetic model is used to predict dissociation of methane hydrate. Developed THM FEM code is applied to the comparative study on a Masuda's laboratory experiment for the hydrate production, and verified for the stability and convergence.

• Geophysics and Geophysical Exploration
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• v.9 no.2
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• pp.148-154
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• 2006

The effect of small-scale near surface inhomogeneity on Rayleigh wave propagation and dispersion has been investigated in this study using two-dimensional FEM elastic modeling. Various inhomogeneity models with a variety of geometrical shape and embedment depth which exist in homogeneous half-space and two-layered media are considered. Results show that any near surface inhomogeneity greater than one wavelength in terms of minimum wavelength of Rayleigh wave shows dispersion characteristics. Such dispersion effect become stronger as the dimensions of the inhomogeneity increase. The effect of horizontal dimension is more dominant factor governing the dispersion characteristics than vertical dimension. However, the dispersion effect can not be identifiable in seismogram if the horizontal dimension is not wide enough. Nonetheless, even in this case, the existence of inhomogeneity can be inferred by the reflection or transmission event of Rayleigh wave. The results can be expected to provide insights on the behavior of Rayleigh wave which may be helpful for designating field work or new processing scheme to detect near surface inhomogeneity by surface wave method.

• Fire Science and Engineering
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• v.30 no.5
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• pp.26-35
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• 2016

Sprinkler installations shall be operated at normal operating temperature of the atmosphere as a fire sprinkler head in any facility to control and extinguish the fire when the fire initially. Recently, however, some flush type quick response automatic sprinkler heads in slow fire place is a problem that can not be normal operation are raised. In this paper, by using the experimental model of the Apartment house of Commons and Cabinet burner size bedrooms fire conditions to form a slow growth rate and can supply more than 0.2 MPa pressure is the minimum pressure that can be applied inside the pipe in the field experiment was conducted. In the majority of experiments lush type quick response automatic sprinkler heads which is used in the country it was confirmed to be incompletely opened as the Cold Soldering occur. This phenomenon is likely to fail early fire suppression and control because they can cause the spread of fire and casualties needed to complement domestic product testing and type approval standards through additional research.

• Spatial Information Research
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• v.11 no.2
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• pp.185-201
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• 2003

The purpose of this study is to seek the methods of constructing a cultural information system based on GIS. It is impossible for regional culture to be formed apart from its surrounding space, so a study of culture should be based on realizing the features of its space. It is important to note that the elements composing a culture complicatedly interact with each other in their function and continuously change. Also they are interrelated in space and plentiful in their amount. Nevertheless, those studies practised so far in relation to culture and constructing cultural database are too limited in establishing cultural area or community life area required to recognize the regional identity So it is now essential that we should study the methods of cultural expression surpassing objective historical and cultural site maps instead of simple maps depicting historical remains or sites. From this viewpoint, this study tries to find various cultural phenomena in relation to their space through seeking the methods of constructing the cultural database model using XML. In addition, this study tries to construct a base for increasing the utilization of information in making the cultural contents.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.4
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• pp.759-764
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• 2017

The paper is intended to explore the spatial relations between flooded buildings and urban expansion phenomena by employing urban expansion intensity index and hotspot analysis methods for the case of Gangneung. Two major results are as followed; first, flooding susceptible areas are found in the regions where the highly intense development occurs within a short period of time, so called pseudo-urbanization. Second, less flooded buildings exist in old towns where it is believed that there is the lack of urban infrastructure services. This study indicates the possibility that the highly intense development and pseudo-urbanization with a relatively short time period relate to flooded building events. In addition, the possibility leads to another issue that new developments might be increasing the flooding vulnerability worse than before, particularly, to the adjacent old towns. For the better understanding, it is desirable to have further related case studies in the near future.