• Transactions of the Korean Society of Mechanical Engineers A
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• v.30 no.4 s.247
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• pp.373-378
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• 2006

We present the design, fabrication, and characterization of a multi-chip microelectrofluidic bench, achieving both electrical and fluidic interconnections with a simple, low-loss and low-temperature electrofluidic interconnection method. We design 4-chip microelectrofluidic bench, having three electrical pads and two fluidic I/O ports. Each device chip, having three electrical interconnections and a pair of two fluidic I/O interconnections, can be assembled to the microelectofluidic bench with electrical and fluidic interconnections. In the fluidic and electrical characterization, we measure the average pressure drop of $13.6{\sim}125.4$ Pa/mm with the nonlinearity of 3.1 % for the flow-rates of $10{\sim}100{\mu}l/min$ in the fluidic line. The pressure drop per fluidic interconnection is measured as 0.19kPa. Experimentally, there are no significant differences in pressure drops between straight channels and elbow channels. The measured average electrical resistance is $0.26{\Omega}/mm$ in the electrical line. The electrical resistance per each electrical interconnection is measured as $0.64{\Omega}$. Mechanically, the maximum pressure, where the microelectrofluidic bench endures, reaches up to $115{\pm}11kPa$.

• Journal of the Korea Furniture Society
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• v.23 no.1
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• pp.75-83
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• 2012

Space dominates all the art activities human do and plays a role of providing aesthetic emotion. Architecture, sculpture, painting, and furniture, etc. these two and three dimensional works are represented in space and interpreted the role of its form, structure and function. Each area is different, but space has been studied in philosophy, physics, geometry, and mathematical studies, etc. and has been consistently interpreted and represented relating to a variety of human creative activity. Furniture is also three dimensional art being dependent on space. In the United States in 2004, I made the living room bench by applying the spatial concept at Rochester Institute of Technology. Two years later, this design was adopted by wendell Castle Collection, an American furniture company, then prototype were made and tested three times during a year, and then since 2007 as indoor benches it has been manufactured in the United States. The study's purpose is to order the process of its development based on the experience of bench production applied the spatial concept, and by analyzing the properties of spatial concept, I am planning to propose a new concept on interaction with the space and furniture for next.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.05a
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• pp.242-245
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• 2006

This paper is an assessment on the dynamic test results of optical bench for LEO satellite. According to the design requirements, optical bench was designed and manufactured. Dynamic test was performed to verify stability of optical bench. Low level random vibration test, sine burst test and sine vibration test are carried out to identify dynamic characteristics and to verify static strength and safety under quasi-static load conditions. From the result it can be stated that the optical bench is well qualified under the launch environmental conditions.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.10a
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• pp.123-127
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• 2002

In order to set up the design rule of micro optical bench, optical coupling efficiencies of two sets of test benches are calculated. Simple linear connections of incoming and outgoing optical fibers with and without ball lenses are designed. Positional errors that are possible in actual fabrication processes are considered in the calculations and their tolerances are determined from 3dB conditions. For a simple fiber-to-fiber connection, the working distance is limited to $2.7\mu\textrm{m}$ and tilt error $5.8^{\circ}$. When ball lenses are located in front of each fiber, the working distance can be extended over $60\mu\textrm{m}$ , but the positional errors have the strong interaction among position parameters and thus should be considered simultaneously for tolerance design.

• Journal of the Korea Furniture Society
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• v.20 no.6
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• pp.566-574
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• 2009

Recent tendency in modern society for urban design and public space forming it recommended diversity of studies and design development, for the interest in urban design is increasing. In particular, street furniture being one of the important components to construct public space has been researched and developed in aspects of formative and emotional style, broken from the old way of the function-oriented purpose. It could be said that this results from the desire of human pursuing a well-off life, the new value standard regarding design and the life styles in mode. The new development of street furniture could be a creating the value-added source potentially being able to raise community, identity of nation and international competitiveness, beyond the primary purpose, namely the improvement of surrounding environment, and therefore the most of countries in the world are concentrating their life and death on development of design in reality. For this investigation the concept of city design, the basic content analysis of the street furniture and also the contents in the related sectors were reported. In order to develop the bench design, one of the representative items of the street furniture furthermore it was proceeded that basic process for the design like data searching for the object place and the existing case studies. On the basis of this the series of the design development processes such as idea sketch, computer rendering and drawing work were described step by step. The aim of this study is therefore to contribute in compiling the development processes of bench design as a new shape into a data and in utilizing it as a design case study and research material in the related sectors.

• The Journal of the Korea Contents Association
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• v.18 no.8
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• pp.658-670
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• 2018

Busan Citizen Park has been taken as the research object in this paper to learn about the categories and types of resting facilities such as seats and Pergolas in the park and analyze the visitors' use patterns of bench and Pergolas. In addition, the analysis of the cultural features and preferences of bench and Pergolas will provide the basic data for the future design of resting facilities. After the research on the categories and types of bench and Pergolas and the evaluation factors through literature surveys, the type, location, and number of resting facilities including bench, Pergolas, sheds, etc. in the entire park have been investigated through field surveys. In addition, the behavioral map analysis has been created through the observation of the use patterns of bench and Pergolas in the morning and afternoon of each month, and the degree of preference and satisfaction of park bench and Pergolas has been grasped through questionnaires. The research results are as follows. Among the ten types of bench and Pergolas, the citizens like the mats and awnings + mats best. The environment is the most important factor for the mats with highest score, followed by the functional and regional factors. In addition, various activities such as eating in mats and sheds that block sunlight are Korean use patterns, which is very common in Korean daily life. These results show that bench and Pergolas in urban parks are not placed arbitrarily and the layout and design of bench and Pergolas should be completed based on behavior and preferences, which are influenced by cultural characteristics.

• Proceedings of the KSR Conference
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• 1999.05a
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• pp.315-321
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• 1999

The railway signaling system consists of microcomputerized vital devices on board and ground, which are connected to one another by track circuits, and interlocking equipment for route control, The software plays a major role in these microcomputer-based vital systems. Therefore it is important to design the software and validate the required levels of safety and reliability To verify the conditions and functions of signaling logic, the laboratory prototype test bench, which consists of personal computers, VME system and Ethernet LAN, will be developed. In this paper general design of signaling system test bench for high-speed rail is described and some developed subprogram is presented.

• Explosives and Blasting
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• v.31 no.2
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• pp.1-5
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• 2013

Parameters of Swedish bench blast design was analyzed by robust design method. Orthogonal array which is adopted in this study was $L_9(3^4)$ and the parameters were hole diameter, explosive type, hole inclination and rock factor of 3 levels. Result of analysis showed that maximum and minimum burden are most affected by hole diameter, followed by explosive type, rock type and inclination of hole. Parameters affecting specific charge are in the order of rock type, explosive type and to specific drilling are hole diameter and explosive type. Cost analysis showed that robust design is capable of parameter optimization.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.36 no.7
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• pp.705-710
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• 2012

In this study, an experiment on an air conditioning test bench was performed to verify the possibility of fuel economy simulation for the SC03 mode, North America fuel economy certification mode with a/c on condition, one of the vehicle fuel economy evaluation modes. The air conditioning test bench used in this study had each chamber simulating the actual vehicle air conditioning system and the controlling temperature, humidity, and air flow velocity to reproduce environmental conditions. Reliable results were obtained about the compressor RPM and inlet air velocity in front of the condenser corresponding to vehicle speed and air velocity in front of the vehicle, respectively, in the simulation of the SC03 mode, previously performed in CWT, in an air conditioning test bench. It was also discovered that there was a distinct difference in the fuel economy depending on the difference in the compressor displacement in the simulation test of the SC03 mode in the air conditioning test bench under various displacement conditions of the compressor.

• Journal of the Korea Furniture Society
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• v.25 no.1
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• pp.28-35
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• 2014

The most widely used material in furniture is wood. It is not only because it has good machinability and can be easily accessed, but also it is eco-friendly and human-friendly. Such material has been continuously being used for furniture and its machining method has been being actively researched and developed. Lumber has and has developed its own machining method. The conventional lumber machining method is difficult to make various types of furniture because it focuses on solving lumber's own modification problem due to the swelling and shrinking, and durability. Considering such characteristic of the material, a method to make it light and durable has been being researched and possibilities were found in wooden ships. Wooden ships are ships made of lumber, and are light and strong to be used in water. Also, in order to reduce the water resistance, it has streamlined curves so is formatively beautiful. The elegant curves and light and strong structure showed sufficient possibility to be used in furniture. Thus, the purpose of this study is to find a method to make various shapes of lumber lightly and strongly, using the production method of wooden ships, and to use this production method in designing furniture to propose a new form and structure of bench design, differentiating from conventional monotypic furniture.