• 대한공업교육학회지
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• v.31 no.1
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• pp.46-62
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• 2006

The purpose of this study is to propose the new direction in the curriculum and framework of information & communication department in technical high schools through analyzing the propriety of curriculum contents, the relationship among the subjects and the time difference in major subjects and mathematics, respectively. The main results of this study are as follows: (1) The common curriculum to include the number of selective and major subjects were different according to the curriculum and studying hours in each school. The differences were caused by the results of managing the curriculum by which was considered characteristics of schools, department and so on. (2) Mathematical contents are evenly found in 3 units in general communication subjects. The mathematical factors are shown similarly in every item in mathematics10-A, mathematics10-B, and mathematics I. The mathematical contents are found most frequently by 41.2% in the communication basis unit, also there were four items which do not exist in the technical high school mathematics. (3) Mathematical contents are evenly found in every unit of electron circuit subject. The mathematical factors in mathematics10-A are shown more than in mathematics I by 8 items. Mathematical contents are found most frequently in the amplification circuit unit by 22.2% of the electron circuit subject.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.41 no.2
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• pp.55-63
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• 2009

This study was performed to evaluate the heavy metal contents in various packaging board. Domestic and foreign OCC (old corrugated containers) and old duplex boards were used as raw materials. Tests were made for the printed and unprinted parts of the sample. Heavy metal contents of old food packaging boards made from virgin pulp fibers were also evaluated. The contents of heavy metals including lead (Pb), cadmium (Cd), barium (Ba), arsenic (As), antimony (Sb), selenium (Se), and mercury (Hg) were determined using ICP-AES (Inductively Coupled Plasma - Atomic Emission Spectrometer), and CV-AAS (Cold vapor-atomic absorption spectrometer) after digesting the samples in a microwave oven. The contents of heavy metals contained in domestic packaging board were higher than those in overseas samples, and OCC showed higher contents of heavy metals than old duplex boards. Printed parts gave greater heavy metal contents than unprinted parts. Results indicate that recycling of paper and paperboard products increases the heavy metal contamination of the paper packaging products and this derives mostly from the heavy metals contained in printing inks. Recycling processes that decrease heavy metals in recycled fibers and new printing inks that contains less heavy metals should be developed to solve the problem associated with the heavy metals in packaging paper products.

• The Journal of the Korea Contents Association
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• v.12 no.8
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• pp.13-19
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• 2012

This paper introduces a test-bed toolkit for evaluating and enhancing text analysis engines which extract technological knowledge from articles, patents, reports and so forth. The toolkit consists of two test-beds for technical entity recognition and relation extraction engines, which are capable of identifying technical entities and predicting semantic relation types between the entities. With using the introduced toolkits, users and developers can efficiently perform the execution monitoring and error analysis of the technical text analysis engines.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.356-361
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• 2010

The RFID/USN is an area which the government tries to develop as part of new grown-up energy of IT convergence system. The government has a policy which raises a world market share of the RFID/USN 14 percent by 2013, 20 percent by 2018, expands companies with more than 5 billion won in annual sales, and increases employment of 44,000 people by 2013, 120,000 people of 2018. The difficulties of new grown-up energy industry entrants are 'costs of technical development', 'lack of technical experts', and, 'worries to find market', and so on. In this paper, we propose an education program that is systematic and has senses of the spot in order to train technical experts in the field of RFID.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.855-858
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• 2008

It can be said that indicator of national competitiveness in 21C knowledge-based society is a ability to create various values of knowledge. Investment of R&D in Korea is located at very high position in the world, and RAND Corporation classified Korea as a industrialized country in science & technology fields because of having potentiality to future technology with major industrialized countries. But globalization status of science and technology is badly lower position among OECD nations. To disseminate Korea's scientific and technical information in the world, this paper's purpose is to examine efforts of non-english speaking countries. And it introduces KoreaScience, gateway to scientific and technical information in korea.

• Journal of Welding and Joining
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• v.28 no.5
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• pp.93-98
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• 2010

The properties of GTA weld for ferritic stainless steel have been studied with different $O_2$ contents in Ar shielding gas at the constant welding speed. A small amount of $O_2$ (0.01~1.0%) was mixed in Ar shielding gas in order to improve the weld penetration. The fully penetrated GTA weld was acquired at 160A weld current shielded by pure Ar gas. Addition of oxygen larger than 0.1% made a full penetration at lower weld current than 160A. The small addition of $O_2$ in Ar shielding gas improved the penetration properties of GTA weld because the $O_2$ in the molten pool accelerated the flow of molten pool and changed the flow pattern from outward to inward direction. The impact energy and DBTT (Ductile- Brittle- Transition-Temperature) of the GTA weld shielded by Ar+$O_2$ (less 0.3%) was similar and the corrosion properties of GTA weld was slightly inferior to those of GTA weld shielded by pure Ar gas.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.29 no.3
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• pp.8-21
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• 2015

Technology for electric lighting has been evolving from Incandescent Lamp(IL) through Fluorescent Lamp(FL) and currently to Solid State Lighting(SSL) such as LED for more than 130 years of time. However, it took more than 100 years until the transition from IL to FL across overall society. That is because the transition is the Socio-Technical Transition(STT) which involves various social elements. This study investigated and analyzed the theories regarding STT, and applied the Multi-Level Perspective(MLP) theory to the case of electric lighting. A qualitative contents analysis was used with secondary data as research method, and the analyzed result was visualized based on the frame of MLP theory. The STT of electric lighting from IL to FL took place as the order of Technical Niche, Socio-Technical Regime and Landscape. Specifically, in Technical Niche level: Establishing Market Niche, Price-Performance Improvement, Learning Process and Support of Powerful Group took place. In Socio-Technical Regime level: Changes in Social Network, Changes in Technology and Changes in Rules. In Landscape level: Macro-Political Development, Socio-Economic Trends and Macro-Economic Trends took place in consecutive order.

• Journal of Korea Society of Digital Industry and Information Management
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• v.9 no.4
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• pp.177-188
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• 2013

Since the world entered the age called "Smart Revolution", there has also been a lot of changes in the field of education. In educational environment, there is a growing interest in smart learning based on mobile contents, with the development of Smart Devices and ubiquitous technology. This paper is about a research on what effects smart learning has on leaner side when learners make active use of mobile contents in this age of Smart Revolution. First, we embodied teaching plans for some practical classes in forms of mobile contents using M-bizmaker. After the learning process based on the embodied contents for students, we analyzed the survey results on 4 sections-their use of apps, screen composition, technical support, interactions. We also studied the results of a questionnaire on 4 sections-contents, information offering, feedback systems, learner assessment-to evaluate their satisfaction. The research suggests that learner satisfaction can be improved with smart learning based on mobile contents embodied for leaners.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.591-593
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• 2006

With a rapid developing speed of science technology field, related technical terminology is growing continuously. So it's increasingly difficult to search proper meaning of terminology. This paper tries to develop and implement a application that user can retrieve the technical terminology meaningly and visually.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• v.30 no.2
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• pp.74-84
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• 1998

This study was carried out to investigate the papermaking characteristics of paper mulberry(Broussonetia kazinoki) for new Korean traditional paper(Hanji). Hanji has been traditionally made only with the bast fiber of paper mulberry. Besides mulberry bast part, wood core was utilized separately or in mixed forms as raw materials for the new Hanji. Hanjis made from the solfomethylated pulp were shown higher brightness and sheet strengths than those from alkali and alkali-hydrogen peroxide pulps. The brightness of solfomethylated pulp was found to be high enough not to need additional bleaching. In the physical properties of the Hanjis mixed with bast part and wood core pulps, the handsheet strengths were decreased as the increase of the wood core pulp contents. But the sheet strengths of Hanjis containing 10∼30% of wood core pulps were higher than those of the Hanji containing bast part pulp only. The sheet formations were improved as the increase of wood core pulp contents, while the sheet strengths were decreased.