• Journal of Digital Contents Society
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• v.2 no.2
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• pp.147-156
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• 2001

This study aims to examine the environmental aspect of users of PDA, an information device whose use is on the rise. The focus is put on the display of PDA products to see how it considered effectiveness and visual effect for users. A better environment will be presented for users by analyzing problems in interface design, such as how easily users can access information and how simply and clearly users can process such information. Additionally, each of PDA products will be tested to see what difficulties users can face while carrying out tasks and how easily users can cope with a problem when facing it. In this study, the utilization of PDA was analyzed in terms of its basic functions such as information input and the output and use of wanted information. Based on the analysis results, a better alternative for uses of PDA will be presented.

• Advances in Computational Design
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• v.5 no.2
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• pp.111-125
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• 2020

The flow behavior of polymer melts within a slit die is an important consideration when designing a die geometry. The quality of the extruded polymer product can be determined through an evaluation of the flow homogeneity, wall shear rate and pressure drop across the central height of the die. However, mathematical formulations cannot fully determine the behavior of the flow due to the complex nature of fluid dynamics and the nonlinear physical properties of the polymer melts. This paper examines two slit die geometries in terms of outlet velocity uniformity, shear rate uniformity at the walls and pressure drop by using the licensed computational fluid dynamics package, Ansys POLYFLOW, based on the finite element method. The Carreau-Yasuda viscosity model was used for the rheological properties of the polypropylene. Comparative analysis of the simulation results will conclude that the modified die design performs better in all three aspects providing uniform exit velocity, uniform wall shear rates, and lower pressure drop.

• Korean Institute of Interior Design Journal
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• v.21 no.4
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• pp.121-128
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• 2012

Interactive space became one of the modern contemporary society design paradigms. For elevating the interactive effect, we need Interactive design development which uses the influential factors on the interactivity. Digital technology is resulted in a change to a society as well as to the life of human and its way of communication. This study is inquiry into the relations and the common characteristics between ecological architecture space and eco-centric environmental philosophy by making a comparative research. This aims to examine type of spatial contexts for performed through literature research for theory by interactive space and case studies for ecological construction elements to design. And the range of case study is limited to interaction space in addition of interactive elements and user interface. And analysis conclusion is show the many type. Five principles that draw at ecological design conceptualization process, whole unity, variety of organic at ecological design conceptualization process, circularity, homeostasis, allness, biological evolution, diversity have involved with concept that presents in ecological esthetics and organic property of ecology-system.

• Korean Journal of Computational Design and Engineering
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• v.4 no.3
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• pp.180-189
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• 1999

Solid freeform fabrication technology, widely known as rapid prototyping an rapid tooling, can create physical part directly from digital model by accumulating layers of a given material. Providing a tremendous flexibility of a part geometry that they can fabricate, these technologies present a opportunity or the creation of new products that can not be made with existing technologies. For this to be possible, however, various design environments including different fabrication processes needs to be considered at the time of design, and finding an appropriate design solution for the new product by combining necessary design communications become increasingly complex as environmental condition become diverse. This paper proposes a geometric modeling paradigm for design and fabrication of a new product, honeycomb structural geometry.

• Clean Technology
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• v.28 no.1
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• pp.63-78
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• 2022

Electronics industrial wastewater treatment facilities release organic wastewaters containing high concentrations of organic pollutants and more than 20 toxic non-biodegradable pollutants. One of the major challenges of the fourth industrial revolution era for the electronics industry is how to treat electronics industrial wastewater efficiently. Therefore, it is necessary to develop an electronics industrial wastewater modeling technique that can evaluate the removal efficiency of organic pollutants, such as chemical oxygen demand (COD), total nitrogen (TN), total phosphorous (TP), and tetramethylammonium hydroxide (TMAH), by digital twinning an electronics industrial organic wastewater treatment facility in a cyber physical system (CPS). In this study, an electronics industrial wastewater activated sludge model (e-ASM) was developed based on the theoretical reaction rates for the removal mechanisms of electronics industrial wastewater considering the growth and decay of micro-organisms. The developed e-ASM can model complex biological removal mechanisms, such as the inhibition of nitrification micro-organisms by non-biodegradable organic pollutants including TMAH, as well as the oxidation, nitrification, and denitrification processes. The proposed e-ASM can be implemented as a Water Digital Twin for real electronics industrial wastewater treatment systems and be utilized for process modeling, effluent quality prediction, process selection, and design efficiency across varying influent characteristics on a CPS.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.389-391
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• 2022

Efforts by the Ministry of Environment and local governments in Korea are continuing to manage the aging of water supply and sewage buried underground. With the support of the Korea Institute of Environmental Industry and Technology's water and sewage innovation technology development project, it is conducting a project to predict and exchange accidents due to aging, and to apply smart functions to new buried pipes. As one of these studies, this paper proposes the design of a dashboard concept model for digital twin-based smart pipe health monitoring, one of the key features of the entire study. Since remote control and monitoring are one of the main functions, distributed transmission and reception agents are deployed to visualize monitoring situations in real time and to increase user affinity by deploying intuitive UI. To validate the design of this proposed special digital twin based smart pipe state monitoring, we construct the conceptual model level and measure the agent effectiveness to validate its excellence.

• Archives of design research
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• v.17 no.1
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• pp.5-14
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• 2004

The study addressed a direction that environmental facilities along avenues will make a progress via urban environment as well as location marketing. The space is specified the campus avenue, which is located in Jongro-gu at Seoul. With the emergence of digital information era, both people' life style and behaviors have been changing in many different ways. As the first approach to the direction, the historical study of the avenue is examined by focusing on the change. All possible related status such as location marketing strategy and various spatial characteristics, environment of the avenue and its facilities are investigated and users' characteristics are analyzed. Through these processes, a new direction and role of design are proposed and are believed to improve the avenue' image and to rediscover its own identity and to make the avenue alive as it used to be. The new proposed direction showed how to approach to design as well as to system of environmental facilities along avenues and in addition to highlighting continuous and synthetic plan. Furthermore, It is expected that both the efforts to improve the avenue' image based on its own cultural characteristic and to foster the cultural-commercialized facilities will contribute to the local residents' life standard and its economic status.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.10 no.3
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• pp.251-259
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• 1998

Environmental control facilities are used to simulate an environment or combination of environments under which many kinds of research and tests can be performed. The design of the control system to maintain desired environmental conditions is essential to proper operation of the facility. A simulation model of the facility has been developed by analyzing each component of the system thermodynamically with necessary properties and heat transfer relations. Using the system simulation model, the required characteristics of the control system has been investigated. PI controller is considered as the most probable controller for this kind of the facility, and electric heater power is shown as the Proper manipulated variable for temperature control.

• International Journal of Air-Conditioning and Refrigeration
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• v.8 no.1
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• pp.62-72
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• 2000

Environmental control facilities are used to simulate an environment or combination of environments under which many kinds of research and tests can be performed. The design of the control system to maintain desired environmental conditions is essential to proper operation of the facility. A simulation model of the facility has been developed by analyzing each component of the system thermodynamically. with necessary properties and heat transfer relations. Using the system simulation model, the required characteristics of the control system has been investigated. PI controller is considered as the most probable controller for this kind of the facility, and electric heater power is shown as the proper manipulated variable for temperature control.

• Korean Institute of Interior Design Journal
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• no.38
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• pp.3-13
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• 2003

Now that 15 years have passed since its introduction to 4 year college in Korea and we have 51 majors in the field of Intoner design established at 47 universities as of 2003, we are in the position to seek the improvement of its educational qualify. With a view to provide data for the setup of proper educational purpose, it has classified their divisions(departments) according to their major names and belonged colleges of the universities and considered their geographical distributions, groupings of curriculum, their framing and features of a standard curriculum. 1)Divisions of the universities where the major of interior design belongs are divided into three categories of design division (design 8t arts, arts), home economics division (home economics, natural science) and architectural division. For the development of the major, universities to which circumstances permit are recommended to establish an independent college of interior design following the . cases in the US. 2) Geographical preponderance of interior design major on Seoul and Gyeongsang Province is desired to be improved. 3) Curriculum of interior design, which is classified into introduction, history of interior design, theory of interior design, design of interior space, digital technology, design elements of inner space, technology of interior design, behavior of environmental psychology, design management and other subjects, was made into a table by divisions. To sum up, curriculum of interior design concentrates on basic design theory throughout all divisions. In connection with the selection of division by high school-graduates or their parents, design division is recommended for those who desire to major in design elements and design management, home economics division for those who desire to major in space design and behavior of environmental psychology and architectural division for those who desire to major in Interior space design, interior design technology and regulations. 4) This research can contribute to the settlement of desirable curriculum for the interior design education, thus upgrading the education level of the major in Korea.