• Journal of Information Technology Services
• /
• v.7 no.2
• /
• pp.149-164
• /
• 2008

As the computing landscape is shifting to ubiquitous computing environments, there is increasingly growing the demand for a variety of device controls that react to user's implicit activities without excessively drawing user attentions. We developed an EMG-based car interface that enables the physically handicapped to drive a car using their functioning peripheral nerves. Our method extracts electromyogram signals caused by wrist movements from four places in the user's forearm and then infers the user's intent from the signals using multi-layered neural nets. By doing so, it makes it possible for the user to control the operation of car equipments and thus to drive the car. It also allows the user to enter inputs into the embedded computer through a user interface like an instrument LCD panel. We validated the effectiveness of our method through experimental use in a car built with the EMG-based interface.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.15 no.1
• /
• pp.89-98
• /
• 2011

In this paper, a new touch user interface which is based on the hand operations of dragging and diversion is presented. With it, convenience and quickness for inputting of texts as well as searching and selecting of multi-layered menus are improved. The new interface also applies relative coordinate systems which display texts on the touch positions corresponding to the moving of touch location. It accommodates more text codes than those in conventional fixed coordinate systems which allocates texts to fixed location on touch screen. The suggested interface is implemented to IPTV remote control and set-top box to prove its practicality and effectiveness.

• Journal of the Korea Society of Computer and Information
• /
• v.5 no.4
• /
• pp.13-20
• /
• 2000

There are many security problems with Electronic Commerce since insecure public networks, especially Internet, are used. Therefore, for implementing secure Electronic Commerce, CAPI(Cryptographic Application Programming Interfaces) is expected to use various form of security applications. The Cryptographic Application Programming Interface supports cryptographic services for each level and various security services. The CSSM API(Common Security Service Management Application Programming Interface) Provides modularity, simplicity, and extensibility in terms of various add-in modules and interfaces in contract to other CAPIs. This paper proposed an applying method of CSSM API having various extensibility and supporting multi-platforms to Electronic Commerce. we describe encryption, digital signature operation of CSSM API's CSP interface and evaluate secureness by matching relation of theratening factors to security services.

• Journal of the Korea Computer Graphics Society
• /
• v.19 no.1
• /
• pp.1-9
• /
• 2013

Color plays a fundamental and important role in various areas, it has become important to choose colors which fits the purpose and also harmonious. The goal of this study is to reduce the difficulties of choosing the color and get the colors with high satisfaction when users want to choose multiple colors. To do this, we extracted and analysed a large number of colors in color database. And We designed an interface applied to high preference color combination rule. We also evaluated the usability and user satisfaction of the interface. The results showed that the functionality of the developed interface is more useful and is more satisfied than that of the conventional interface.

• Journal of the Institute of Convergence Signal Processing
• /
• v.17 no.2
• /
• pp.67-70
• /
• 2016

This paper discusses a graphic user interface(GUI) for the concealed target segmentation. The human subject hiding a metal gun is captured by the passive millimeter wave(MMW) imaging system. The imaging system operates on the regime of 8 mm wavelength. The MMW image is analyzed by the multi-level segmentation to segment and identify a concealed weapon under clothing. The histogram of the passive MMW image is modeled with the Gaussian mixture distribution. LBG vector quantization(VQ) and expectation and maximization(EM) algorithms are sequentially applied to segment the body and the object area. In the experiment, the GUI is implemented by the MFC(Microsoft Foundation Class) and the OpenCV(Computer Vision) libraries and tested in real-time showing the efficiency of the system.

• Proceedings of the IEEK Conference
• /
• 2005.11a
• /
• pp.699-702
• /
• 2005

This paper describes a high speed interface using redundant multi-valued logic for high speed communication ICs. This circuit is composed of encoding circuit and decoding circuit. Because of the multi-valued data conversion, this circuit makes it possible to achieve higher operating speeds than that of a conventional binary logic. Using this logic, a 1:4 DEMUX (demultiplexer) was designed using a 0.35um standard CMOS technology. Proposed circuit is achieved an operating speed of 4.5Gb/s with a supply voltage of 3.3V and with power consumption of 53mW.

• The KSFM Journal of Fluid Machinery
• /
• v.1 no.1 s.1
• /
• pp.72-80
• /
• 1998

Computational analysis of incompressible flows by numerically solving Navier-Stokes equations using multi-block finite volume method is conducted on a parallel computing system. Numerical algorithms adopted in this study $include^{(1)}$ QUICK upwinding scheme for convective $terms,^{(2)}$ central differencing for other terms $and^{(3)}$ the second-order Euler differencing for time-marching procedure. Structured grids are used on the body-fitted coordinate with multi-block concept which uses overlaid grids on the block-interfacing boundaries. Computational code is parallelized on the MPI environment. Numerical accuracy of the computational method is verified by solving a benchmark test case of the flow inside two-dimensional rectangular cavity. Computation in the axial compressor cascade is conducted by using 4 PE's md, as results, no numerical instabilities are observed and it is expected that the present computational method can be applied to the turbomachinery flow problems without major difficulties.

• Journal of Korea Society of Industrial Information Systems
• /
• v.10 no.4
• /
• pp.90-96
• /
• 2005

This paper develops a multi-casting system could be used in a school and hospital and government and municipal public offices. The developed multi-casting system uses various educational multimedia titles effectively and is capable of remote control by using a network(LAN). The developed system includes speaker control module that make individual or group broadcasting, AV contents control module for using a diverse educational multimedia title effectively and light control module. The system uses RS-485C communication module and the effective control system interface based on GUI.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.14 no.1
• /
• pp.106-113
• /
• 2011

This paper describes Data Acquisition & Analysis System(DAS) for analysis of the multi-function radar. There are various information - beam probing data, clutter map data, plot data, target tracking data, RT tracking data, radar signal processing data, interface data - this device saves. The most important thing of data analysis is that a researcher gets a view of the whole data. The DAS intergrates with all of the data and provides overall information on the time matters occur. This is very useful advantage for approaching the matter easily. System algorithms of multi-function radar are improved by using this advantage. As a result of, range blank region have fallen about 72% and it is able to keep track in jammer environment.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.11 no.5
• /
• pp.116-123
• /
• 2008

Hydrocodes are large computer programs that can be used to solve a wide variety of highly transient problems such as high-speed impact and explosion events. This paper describes the recent activity to develop a Multi-material hydrocode in Korea. The code consists of two stages; Lagrangian, and remap stages. Although a sophisticated contact algorithm has been developed for Lagrangian calculations, a relatively simple mechanics at the interfaces of materials are used in the multi-material Eulerian code. Volume of fluid interface reconstruction methods are used to resolve the interfaces between different materials. For the advection stage of the cell centered properties, one-dimensional hyperbolic equation is used. Test problems demonstrated here are the high-speed impact/penetration and explosion problems.