• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.56-61
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• 2009

According to the target object for designer to sketch, an effective style or shape of input device can be defined differently. The general spatial sketching system that support various types of wand assist sketching effectively as changing suitable wand shape to the part of a target object. We suggest the idea of changing wand style by altering the posture of a 3D wand. This allows a designer to work in an intuitive way without being interrupted by complicated menus. We implement the various wand styles to the spatial sketching system with cubic-based drawing technique.

• Journal of Industrial Technology
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• v.28 no.A
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• pp.75-80
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• 2008

This paper describes the mechanical and control design of a robotic device for providing therapeutic assistance to arm movement following stroke. This is a new robot for arm therapy applicable to the training of activities of daily living in homes and clinics. This instrument has one degrees of freedom, and is equipped with position and force sensors. Repetitive movement can improve movement performance in patients with neurological or orthopaedic lesions. The application of robotics can serve to assist, enhance, evaluate, and document neurological and orthopaedic rehabilitation of movements. The new robot, the mechanical structure, the control circuit, the sensors and actuators and some safety aspects.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.833-836
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• 1998

The propose of this paper is to implement the master slave control with non-actuated Master Arm scheme by using spaceball. The spaceball is a device which can receive all 6-DOF at once and was selected because it isn't dependent to robot type or it's DOF but can be used to produce information about 3D coordiante system The proposed method's main benefit is that one who has no idea about robot structure can control the manipulator with easy. The simulation is supported with 3 modes of control to accomodate unexpected situation. The proposed implementation has probed that a non-trained user can manipulate the slave with intuition without much difficults.

• The Journal of Korean Physical Therapy
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• v.18 no.6
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• pp.33-41
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• 2006

Purpose: To measure the cervical isometric force generation capacity of men and women, IsoTract was used. Also the aim of this study was to compare manual muscle testing with isometric muscle strength in women. Methods: Forty seven healthy subjects(25 men, 22 women; age range, 18-29) were recruited in two sessions, one for flexion and the other extension. The cervical strength was measured using a force measuring device as IsoTract. Results: Cervical isometric strength was found to be measure for flexion(27.78 Ibs maximum and 24.52 Ibs average) and extension(33.22 Ibs maximum and 29.90 Ibs average) in mans. And isometic muscle strength for women exerted significantly higher in the grade 4 over than in the grade 3 in women. Conclusion: We concluded that there were difference in isometric muscle strength for the grade of manual muscle testing. So this findings may assist in the measure of whole body muscle strength.

• Proceedings of the KOSOMBE Conference
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• v.1994 no.05
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• pp.146-147
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• 1994

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2007.05a
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• pp.157-160
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• 2007

Based on Nisbett and his colleagues' theoretical model "Holistic" and "Analytic" which show the differences in cognitive style of Eastern Asian and Westerners, the author hypothesized that the differences in cognitive style of people from diverse cultural backgrounds may influence their perception and usage of webpage. An experiment was carried out and the Eye-gaze device was used to assist to explore the relationship. The results revealed the relationship between cognitive style and webpage design. different cognitive style results different viewing pattern on webpage. Chinese people are more likely to have a holistic view of the whole page first and then focus on detail, while French people tend to read the heading information first and then proceeding down the page. Chinese emphasized the background as well as the whole look and feel of the webpage more, while French noticed the independent contents and element designs more on the webpage.

• Journal of Biomedical Engineering Research
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• v.3 no.1
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• pp.43-48
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• 1982

Ventricular assist device(VAD) has been clinically applied as a temporary circulatory sup- porting system in the patients with severe heart failure, but small sized VAD for infant is not available. The purpose of this paper is to introduce small sized VAD and presents the result of in vitro test. Sejong VAD is diaphragmatic type of pneumatic pump and stroke volume is 11cc. Cardiac outputs of the Sejong VAD were measured by overflow tank under variable conditions of driving parameters. The cardiac output was 1.3 1/min at the heart rate of 120 per minute, left atrial pressure of 15cmH2O, percent systole of 43%, driving pressure of 240 mmHg, vacuum pressure of -40 mmHg, and mean aortic pressure of 70 mmHg. No mechanical problem was developed during the continuous in vitro test for 3 months.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.04a
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• pp.366-370
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• 1997

This paper descibes a micro groove machining process on the polyurethane biopolymer by KrF excimer laser. To investigate the etch charcteristics of polyurethane biopolymer quantitatively,laser system for ablation was installed with high precison moter and then polymer ablation experiment, in which paramteters were fluence,pulse repetition rate,numbers of pulses and assist gas, was carred out. In this experiment, we found out that the value of critical energy density for ablation is 30mJ/cmsup2/ and the etching rate is more dependent on the pulse number and fluence than any other pamameter. Finally, we machined micro grooves for fiexibility as width 300.mu.m depth 100.mu.m and port for micro-devices mounting as length 100.mu.m width 300.mu.m depth .mu.m on the outer wallof polyurethane biopolymer tube which is used as medical device.

• Journal of Korean Library and Information Science Society
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• v.31 no.3
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• pp.185-211
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• 2000

This paper describes methods on effective design and positive usability that accompanied the development of cooperative digital library project to be comprised of 7 university in north area. In order to accomplish this object I want to suggest that the nation must assist positively the development for an cooperative digital library model.

• Proceedings of the KOSOMBE Conference
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• v.1997 no.11
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• pp.113-117
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• 1997

In this paper we detected the thrombosis formation by spectral analysis and neural network. Using microphone and amplifier, we measured the sound from the mechanical valve which is attached to the pneumatic ventricular assist device. The sound was sampled by A/D converter and the periodogram is the main algorithm or obtaining spectrum. We made the valvular thrombosis models using pellethane and silicon and they are thrombosis model on the disk, around the sewing ring and fibrous tissue growth across the orifice of valve. The spectrum of normal and 5 kinds of thrombotic valve were obtained and primary and secondary peak appeared in each spectrum waveform. So to distinguish the secondary peak of normal and thrombotic valve quantatively, 3 layer back propagation neural network.