• Korean Journal of Materials Research
• /
• v.18 no.8
• /
• pp.417-421
• /
• 2008

$Al_2O_3$ sol with long-term stability was prepared by mechanical milling. Thin films were evaluated and created for use as coating materials. The particle size of the manufactured sol was 98 nm when 2 wt% of nitric acid was added. This indicates that the viscosity of the sol is 12 cps and that it has long-term stability. The thickness of the thin films, which varied from 100 nm to 500 nm, could be managed by adjusting the draw rate and the amount of an organic additive. A thin film heated to $500^{\circ}C$ indicated a hydrophilic property against water and excellent permeability against a visible ray.

• Journal of the Semiconductor & Display Technology
• /
• v.12 no.2
• /
• pp.1-6
• /
• 2013

The effects of interlayer formation and thermal treatment on the field-emission properties of carbon nanotubes (CNTs) were investigated. The CNTs were prepared on tungsten (W) micro-tip substrates using the electrophoretic deposition (EPD) method. The interlayers, such as aluminum (Al) and hafnium (Hf) were coated on the W-tips prior to CNT deposition and after the deposition of CNTs all the species were thermally treated at $700^{\circ}C$ for 30 min. The field-emission properties of CNTs were significantly improved by thermal treatment. The threshold electric field for igniting the electron emission was decreased and the emission current was increased. The Raman spectroscopy results indicated that this was attributed mainly to the enhancement of CNTs by thermal treatment. Also, the CNTs deposited on the interlayers showed the remarkably improved results in the long-term emission stability, especially when they were thermally treated. The X-ray photoelectron spectroscopy (XPS) measurement confirmed that this was resulted from the formation of the additional cohesive forces between the CNTs and the underlying interlayers.

• Journal of the Korea Institute of Building Construction
• /
• v.11 no.5
• /
• pp.442-451
• /
• 2011

Blast furnace slag is recycled as a high value-added material, while steel slag is difficult to recycle or is recycled as a low-grade filler material due to its expansive characteristics. Its property is caused by the high content of free lime and instable steel oxides. Recently, an innovative and rapid cooling method for melting steel slag has been developed in Korea, which reduces free lime content to a minimum level and increases the stability of steel oxides. However, researches on the long-term stability are not sufficient so far. Therefore, this study, focusing on the electric arc furnace oxidizing slag in the steel slag, aims to investigate the properties of the steel slag aggregate, its long-term volume stability and the engineering strength of mortar, and using it as a fine aggregate. This study result indicated that it was possible for it to be used as concrete aggregate because the volume change of the steel slag appeared to be stable.

• Asian Journal of Innovation and Policy
• /
• v.7 no.3
• /
• pp.564-580
• /
• 2018

The creation of academic start-up firms is an important and practical issue in the management of technology in Japan. The present study designs a model for creating academic start-up firms that fits into the social context. It focuses on the case of FIRST Program, an initiative that consists of 30 projects in innovative arenas, analyses the presence of large-scale public funding, and investigates the role of venture capitalists as support personnel in each project. As a result, the presence and significance of 'long-term escort' by an 'entrepreneurial venture capitalist (EP-VCist)' were confirmed as common features across the cases observed. EP-VCist refers to a person who can maintain and fulfil dual roles at a university and a venture capital firm, and who can take the lead throughout the venturing process as a risk taker. 'Long-term escort' is a form of support that reduces risks in the venturing process by supporting university researchers in the pre-entrepreneurial stage and by exerting a robust bridging role between a university and an industry.

• Journal of Korean Society for Atmospheric Environment
• /
• v.2 no.3
• /
• pp.19-26
• /
• 1986

The degree of air pollution is usually presented in terms of concentration. But, in evaluating the environmental impacts or air pollution control policies, the concentration values need to be interpreted in terms of damage effects on property and human health. The damage effect varies with the types of pollution, subjects and land use pattern of an affected area. Therefore, this study is aimed at developing a method of analyzing effects of various types of air pollutions on surrounding environmental setting with the EIMS (Environmental Information Management System) developed for land suitability analysis. Using the method formulated in this study, the long- term effects of such pollutants as $SO_2$ and HF on types of vegetation and residents, and potential, short-term effects of HCl leak accidents from manufacturing facilities in Ulsan and Onsan Industrial complex are analyzed. The presentation of the damage effects of air pollution rather than the concentration of pollutants will be useful for the preparation of environmental impact statements, the formulation of environmental policies, and the development of land use plans in heavily industrialized areas.

• Journal of Environmental Science International
• /
• v.12 no.2
• /
• pp.157-162
• /
• 2003

Boeun-gun is hard to develop, because of large numbers of mountains and vast distribution of limited development districts. However it is easy to access from the entire country, and there are large conservation area such as national park and dams. Short-term plans such as attraction of tourists can be established using these advantages. Long-term plans can be planed with stable establishment of continuous considerations and supports. These supports will be rewarded while it demands some time and costs. Private owned mountains can be converted from negligence upkeep of property to utilization of mountains with basic consideration of mountain conservation. This may contribute the essential function of mountain.

• Korean Journal of Remote Sensing
• /
• v.17 no.4
• /
• pp.335-344
• /
• 2001

Texture is extensively studied in a variety of image processing applications such as image segmentation and classification because it is an important property to perceive regions and surfaces. This paper focused on the analysis and synthesis of textured single and multiband images using Markov Random Field model considering the existent spatial correlation. Especially, for multiband images, the cross-channel correlation existing between bands as well as the spatial correlation within band should be considered in the model. Although a local interaction is assumed between the specified neighboring pixels in MRF models, during the maximization process, short-term correlations among neighboring pixels develop into long-term correlations. This result in exhibiting phase transition. In this research, the role of temperature to obtain the most probable state during the sampling procedure in discrete Markov Random Fields and the stopping rule were also studied.

• The Korean Journal of Archival Studies
• /
• no.38
• /
• pp.265-309
• /
• 2013

In response to the current electronic record environment, storing electronic records for necessary long terms have been the topic of the times. Especially, the method to preserving original form such as original functional property and bit stream becomes the key to long term preservation of electronic records. Until now in Korea migration methods were chosen as long term preservation strategy for public records, but the limitations were that the functionality and the original bit stream could not be maintained. Among the strategies for long term preservation of electronic records, emulation has significant strengths in that it can replicate the original form of electronic records without changes in the bit stream, and that unlike migration it can establish a single preservation strategy without needing to apply individual strategies according to type of electronic record. Especially because it can replicate the functional components that cannot be implemented in the current long term preservation format, there is a need to study the application method based on the studies of electronic record types currently used by public institutions. This study, to explore the methods for applying emulation as a strategy for the long term preservation of electronic records, reviews the latest study cases from the west about emulation as base study, and tries to analyze the specific cases about the feasibility, target, and methods of emulation. Through this the study tries to explore the implications for domestic application as well as the strengths and weaknesses of emulation. To do this, the study analyses the concept, strengths and weaknesses of emulation as a long term preservation strategy, the analyses the latest best cases of emulation in the west; CAMiLEON, KB, Planets, and KEEP project. Based on these analysis this study tries to suggest implications and application methods for electronic records in the future in Korea.

• Proceedings of the KSR Conference
• /
• 2007.11a
• /
• pp.1248-1253
• /
• 2007

Urban transit or subway stations generally service for a long period of several decades. And, the urban transit or subway is public transportation which lots of people takes every day. During the service time, they are inevitably damaged from environmental corrosion, material aging, fatigue, and the coupling effects with long-term loads and extreme loads. The included damage accumulates and performance degenerates due to the above factors. They would inevitably reduce the resisting capacity of station against the disaster; even they result in collapse with the structural failure under extreme loads. And, if disaster such as earthquake, fire, etc. happens, it causes huge property damage and threatens the human lives. Because of these above reasons, the intelligent health surveillance system should be researched and developed for ensuring the safety of station. In this paper, the research plans of the intelligent health surveillance system of urban transit station are presented. And also, the development or establishment directions of this system are suggested.

• Journal of Korea Technology Innovation Society
• /
• v.11 no.1
• /
• pp.23-45
• /
• 2008

The object of this study is to present a strategy against technology protectionism of advanced countries focusing on international cooperation policy of KIPO and infringement of overseas intellectual property rights on the notion that a policy performed without a long-term plan will not lead to industrial growth in the long run. There is a high possibility that aggressive patent policy and black box strategy of Japanese enterprise can be a burden to Korean enterprises. Thus, a policy should be established against the technology protectionism. The policy can be based on a strategy about international cooperation policy of KIPO and strategy against infringement of overseas intellectual property rights. Of course, collaboration and cooperation will be activated among the advanced countries including technical cooperation. However, a systematic strategy of intellectual property rights should be focused on international cooperation and countermeasure against infringement of overseas intellectual property rights because national interest takes precedence over any other interest especially in case of strategically owing industry. A strategy against technology protectionism of advanced countries is as follows. A strategy is required to cope with infringement of overseas intellectual property rights. Korean government has to strengthen the function of overseas intellectual property rights protection center, strengthen boundary restriction of infringement goods, promote international dispute study, train international dispute specialist, construct confidence as social capital etc. Enterprises have to maintain no Patent no Future policy, specialize on application and countermeasure against infringement dispute, participate for formation and standardization of patent pool, strive for specialization regarding technical transfer and license management.