• Journal of The Korean Association For Science Education
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• v.24 no.1
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• pp.76-89
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• 2004

Recent studies of science and technology "in-the-making" revealed that the process of designing material artifacts is not a straightforward application of prior images or theories by one (or more) person(s) isolated from his or her (their) environment. Rather, designing is a process contingent on the social and material setting for both engineering designers and students. Over the past decade, designing technological artifacts has emerged as an important learning environment in science classrooms. Through the analyses of a large database concerning an innovative simple machines curriculum for sixth-and seventh-grade students, we accumulated valid evidence for the nature of the designing process and science learning through it. In this paper, we show that design actions intertwine with the transformation of the objectified raw materials and artifact, the designer collective, and the mediating tools enabling that transformation, which constitute the elements of an activity from the perspective of cultural-historical activity theory. We conceptualize the continuous change of relation between material artifacts, designers, and tools throughout the design activity as co-evolution. Two episodes were selected to exemplify synchronic and diachronic change of relations inherent in co-evolving activity system. Finally, we discuss the implications of co-evolution during design activity for science learning.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.303-303
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• 2009

As the technology advances, the product design process is also being complicated. These days, it is common for engineers to consider socio-psychological factors as well as technological elements in the design process. In this work, I will explain why and how engineers make allowances for human factors in developing and designing technological products.

• Journal of Korean Elementary Science Education
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• v.38 no.2
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• pp.287-304
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• 2019

Teaching with technology has been widespread in practical classroom settings, and increased the needs to enhance pre-service teachers' capability with a variety of technologies. The purpose of this study is focused on designing and implementing a training program to develop pre-service teachers' Technological Pedagogical Content Knowledge(TPACK) which promotes them use technologies tactically in integrated science classes. Based on the theoretical framework of TPACK and Practitioner's Guide to TPACK, the authors developed ten periods of lessons comprised instructional skills in elementary science education. Subsequently, the program was applied into a teacher trainee course in Korea. The results of this study indicate that the TPACK training program for pre-service teachers significantly influenced on attitude toward convergence, TPACK, and science teaching efficacy of the engaged participants. The developed program, meanwhile, caused a significant TPACK improvement of female participants of the teachers college more effectively. Furthermore, it mitigated the gap between science and humanity tracks coming from their high schools. Consequently, there are possibilities to improve pre-service teachers' teaching strategies for integrated classes, if they have opportunities to review the comprehensibility of technological, pedagogical, content knowledge, and intersected areas with metacognitive perspectives.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.38 no.6
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• pp.436-445
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• 2001

In this paper, we introduce modulo ( 2$^n$-1) parallel-processing residue multipliers, using Op Amp circuits, and their technological application to designing binary multipliers. The limit of multiplying speed in computational processing is a serious harrier in the advances of VLSI technology. To solve this problem, we implement a class of modulo ( 2$^n$-1) parallel multipliers having superior time complexity to O( log$_2$( log$_2$( log$_2$$^n$))) by applying Op Amp circuits, while investigating their technological application to binary multipliers. Since they have excellent time & area complexity compared with previous parallel multipliers, and are applicable to designing binary multipliers of the same efficiency, such parallel multipliers possess high academic value. Indexing Terms Modular Multipliers. Binary Multipliers. Parallel Processing, Operational Amplifiers, Mersenne Numbers.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.2
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• pp.105-114
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• 2013

Expansion and growth of body information monitoring service based on WBAN technology speeds up technological evolution in bio-signal detection and measurement, real time monitoring of vital sign and telemedicine control. It is essential for taking action against such technological evolution that newest technology trend and standardization issue should be included in designing and materializing body-information monitoring system strategically to secure preceding technology and to preoccupy market. This paper investigates and analyzes technological trend & issues, and suggests task to take action technologically.

• International Journal of High-Rise Buildings
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• v.7 no.1
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• pp.75-84
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• 2018

For over 100 years, the tall building has largely advanced in technological innovation; however very little has been done in the terms of understanding the changing needs of the occupant needs and experience. The vast changes occurring due to technology and mobility demand reconsidering the tall building today and for the future. This paper will briefly survey the past eras of tall building design and will propose considerations and solutions for the future.

• Journal of Animal Environmental Science
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• v.2 no.1
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• pp.13-25
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• 1996

This study was conducted to analyze the technological levels of the domestic industries manufacturing the machinery and equipment for livestock production facilities and to lay out a scheme for upgrading the technical improvement. The results of this study are as follows : 1 . According to the study results, the technological levels of the domestic industries for livestock production facilities lag far behind those of the advanced countries in this field. 2. It was found that the ratio engaged in the areas of R&D was 10.7% and lower than that engaged in the other areas and the ratio of junior college graduated engineers engaged in the areas of research and design was 44.4%. Therefore, the amounts of investment for the areas of R&D and design should be increased. 3. In the design area, it was found from the study that the most weakness technologies which should be developed in near future were the universal harvester and the mechanical designing. Therefore, the multipurpose universal harvester suitable to the domestic farmland conditions should be developed and strength, hardness, and durability of materials in the mechanical designing should be improved.

• Industrial Engineering and Management Systems
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• v.13 no.1
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• pp.107-115
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• 2014

Offshore wind power has been extremely popular in recent years, and in the energy technology field, relevant research has been increasingly conducted. However, research regarding patent portfolios is still insufficient. The purpose of this research is to study the status of mainstream offshore wind power technology and patent portfolios and to investigate major assignees and countries to obtain a thorough understanding of the developmental trends of offshore wind power technology. The findings may be used by the government and industry for designing additional strategic development proposals. Data mining methods, such as multiple correspondence analyses and k-means clustering, were implemented to explore the competing technological and strategic-group relationships within the offshore wind power industry. The results indicate that the technological positions and patent portfolios of the countries and manufacturers are different. Additional technological development strategy recommendations were proposed for the offshore wind power industry.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.1104-1107
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• 2003

Normally white TN-LCD is the preferred solution in active matrix display thanks to easy production, fast response and good white balance. However, it is has poor viewing angle properties and correction films are difficult to design. We present the mathematics of designing a compensating film and discuss various technological solutions for making

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.05a
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• pp.395-399
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• 2009

Advanced afterburner used in the most modernized gas turbine has new designing paradigm to cope with reinforced power density. The most distinct change is the designing trend to integrate fuel injectors and flame holder in order to manage higher temperature of inlet air. F414 and F110-GE-132 engine adopted this methodology and installed a variable nozzle utilizing CMC(Ceramic Matric Composite) material and active cooling of nozzle flap with ejector nozzle in order to enhance the life cycle of engine components and an economical aspect. These technological trends can be utilized for an advanced ramjet engine and combined cycle engine like TBCC.