• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.212-214
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• 2015

Nowadays, while digital fabrication opens a new paradigm, this study is to review the trend of open source hardwares. and then, it is to understand the background of digital fabrication and to suggest the related policies and orientation of our government.

• Journal of KIBIM
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• v.9 no.3
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• pp.8-18
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• 2019

Precast concrete manufacturing has proved economies of scale through the repetitive production by means of standardization, automation, and prefabrication. Advanced digital design and fabrication technologies can empower its benefits by enabling mass customization in the building design and construction. This study analyzed five case studies in terms of 1) design intent and background, 2) module development and facade construction, 3) integrated process among project stakeholder. This article has attempted to establish the following three points in conclusion: 1) Form generating digital design tools such as Rhino, CATIA, Generative Component, and Digital Project were implemented to produce parametric surface pattern and rationalization to maximize existing precast manufacturing benefits. Also, BIM program has been used to promote coordination and communication among engineering consultants and contractors, 2) In addition to traditional precast concrete materials, GFRC, RFP, brick cladding precast and 3D printed mould have been introduced to reduce the weight and cost and to comply the code from the zoning, seismic, and fireproof requirements, 3) Design-assist contract, design-assist financial support, and co-location measures have been introduced to facilitate collaboration between architect, fabricator, and contractor from the beginning of the project.

• Laser Solutions
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• v.9 no.1
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• pp.1-7
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• 2006

In order to increase the productivity of conventional microstereolithography (MSL), digital micromirror device($DMD^{TM}$) based MSL is proposed and the feasibility of 3D rnicrocomponents fabrication is demonstrated in two ways; free surface and constrained surface techniques. The clearness of optical images at the exposure plane was confirmed for the fabrication of an accurate 3D structure by controlling the dynamic viscosity of FA1260T and the shape accuracy of a structure fabricated with epoxy-based resin ($Somos^{\circledR}$ 10120) was analyzed to determine the optimum curing conditions. After finding the appropriate process variables, the feasibility of multiple microstructures is then demonstrated. Due to the high productivity, MSL using $DMD^{TM}$ showed the potential to replace the existing focused laser beam MSL.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2014.11a
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• pp.69-70
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• 2014

For the curved concrete track construction of 2018 winter Olympic sliding center in Pyeongchang, in this study proposed the digital fabrication technology using CNC. This method can control the 3D geometries of the curved concrete structure based on the digital design. Conventional method generates the construction errors because this method fabricates many temporary zig bar using 1:1 full size drawing for install frozen pipes and sets up each zig bars at the construction site. Propose method is effective to ensure the precise fabrication and construction of zig bars. Also this method can eliminate errors of the frozen pipes position and curved concrete construction.

• Journal of the Korean Institute of Telematics and Electronics
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• v.23 no.6
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• pp.747-753
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• 1986

This paper describes the design and fabrication of a digital volume control integrated circuit which replaces a mechanical volume control. The integrated circuit can be controlled volume by up/down switch. It has been fabricated by SST bipolar standard process. Its chip size is 2.5x2.5 mm\ulcorner As a result, we succeeded in fabrication of integrated circuit which satisfied DC characteristics and proper operation of volume control.

• JSTS:Journal of Semiconductor Technology and Science
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• v.2 no.4
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• pp.280-287
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• 2002

We present technical issues involved in the development of actuators and sensors for applications to high-precision Micro Electro Mechanical System (MEMS). The technical issues include fabrication uncertainty and noise disturbance, causing major difficulties for MEMS to achieve high-precision actuation and detection functions. For nano-precision actuators, we solve the fabrication instability and electrical noise problems using digital actuators coupled with nonlinear mechanical modulators. For the high-precision capacitive sensors, we present a branched finger electrodes using high-amplitude anti-phase sensing signals. We also demonstrate the potential applications of the nanoactuators and nanodetectors to high-precision positioning MEMS.

• Journal of the Korean Society of Safety
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• v.26 no.5
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• pp.27-32
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• 2011

Recently new technological development needs the advances in the fields of new materials. The most advanced design is not useful if new material's performance is not realized adequately for bearing the service loads and conditions. FGMs suggests the reasonable solution for the those requirements because of its wide range microstructure and the continuous constitutions. It's especially good for the heat-resisting components, piezoelectricity and aerocraft fields. However the fabrication and its experimental estimation methods have not been established because of its various freedom of material's properties. Therefore it is necessary to develope the fabrication method and estimation of strength and deformation. The experiments are conducted under a four point flexural test. According to results, this study shows that FGMs is well fabricated and the deformation and strain fields are expressed very well by digital image correlation method.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2015.11a
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• pp.175-176
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• 2015

Starting from Guggenheim Bilbao Museum in 1997, it has been increased steadily that complex geometry buildings using digital designs and construction process. Since 2010, the domestic Freeform design has been widely used for buildings such as Dongdaemoon Design Plaza, Seoul City Hall, Tri-Bowl, and etc. But there are many defects such as the increased cost and period of construction, and the declined quality of construction because of the lack of optimized method and engineering experiences. Therefore, this study has an effort to review case study of the recent freeform buildings and construction methods using digital fabrications. And this study proposed the improve method for the construction quality for freeform buildings.

• JSTS:Journal of Semiconductor Technology and Science
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• v.16 no.3
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• pp.300-311
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• 2016

The analog-to-digital-converter-based (ADC-based) backplane receivers that consist of a front-end ADC followed by a digital equalizer are gaining more popularity in recent years, as they support more sophisticated equalization required for high data rates, scale better with fabrication technology, and are more immune to PVT variations. Unfortunately, designing an ADC-based receiver that meets tight power and performance budgets of high-speed backplane link systems is non-trivial as both front-end ADC and digital equalizer can be power consuming and complex when running at high speed. This paper reviews the state of art designs for the front-end ADC and digital equalizers to suggest implementation choices that can achieve high speed while maintaining low power consumption and complexity. Design-space exploration using system-level models of the ADC-based receiver allows through analysis on the impact of design parameters, providing useful information in optimizing the power and performance of the receiver at the early stage of design. The system-level simulation results with newer device parameters reveal that, although the power consumption of the ADC-based receiver may not comparable to the receivers with analog equalizers yet, they will become more attractive as the fabrication technology continues to scale as power consumption of digital equalizer scales well with process.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1376-1379
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• 2007

The effects of the MgO fabrication process on the properties of AC-PDPs were examined. MgO films were deposited by e-beam evaporation with various substrate temperatures and oxygen flow rates. MgO films were analyzed by XRD, CL and ellipsometer. Panel properties such as luminance, efficiency, discharge voltage and discharge delay time were measured with test panels. MgO films with higher temperature, smaller oxygen flow rate showed shorter discharge delay time. Also they showed smaller XRD peak intensity. These results revealed that the discharge delay time was strongly influenced by temperature and oxygen flow rate of the MgO fabrication process.