• Proceedings of the KOSOMBE Conference
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• v.1991 no.11
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• pp.66-69
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• 1991

This paper describes a design of transducer for non-invasively detecting pressure radial pulse wave in aterial system and a recording system that for the studing the aterial pulse diagnosis of korean traditional medicine. The mechanism of transducer is composed of sensing mechanism, pressure sensor, conditioning amplifier. The variation of radial pulse pressure in the sensing mechanism is converted to the electric signal by piezo-resistive pressure sensor and it converted to the digital signal after preprocessing via A/D converter. The converted signals inputed to the computer as data files and then it display to the monitor for waveform watching and this datas can be used as the aterial pulse diagnosis data. This system effectively detect non-differential radial pulse wave and we conside that if analizing the recorded radial pulse wave, compared each other, it can be helpful in quantify radial pulse wave diagonosis of the Korean traditional medicine.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.10a
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• pp.48-53
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• 2014

Rocket, held using the CCA for the mission, a plurality of recording devices, and navigation equipment. In case of a projectile which is entered the water after fired into the air, after performing stages and fairing separated in flight to enter the underwater. It is caused by the explosion of gunpowder mainly, vibration phenomenon of a large transition is induced structurally very, also on entering the water, have a significant shock structurally separated. If shock is transmitted directly to the CCA through the body, it can be caused malfunction of payloads, resulting in failure of the mission of the projectile. In order to ensure the stability against shock, in this paper, Calculating a target resonacne frequency of the CCA, and verified through modal test and analysis. Maximum acceleration position of CCA is checked by SRS analysis. In addition, effectiveness of shock isolation system through shock analysis.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.607-609
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• 2005

본 논문에서는 실시간으로 다채널의 카메라에서 입력되는 영상을 동시에 압축 및 복원할 수 있는 PC 기반의 DVR (Digital Video Recording) 시스템을 위한 MPEG-4 방식의 코덱을 구현하고자 한다. 현재까지의 일반적인 압축 방식은 화상회의 용도의 H.263, VCD 화질의 MPEG-1, DVD급 화질인 MPEG-2가 널리 적용되고 있다. 하지만 이러한 방법들은 저장 데이터의 양이 커서 효율적인 저장이 어렵다. 따라서 본 논문에서는 이러한 문제점을 해결하면서 실시간적으로 다채널 영상 데이터 저장이 가능한 MPEG-4 압축 방식을 적용한 코덱을 제작한다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1996.11a
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• pp.143-146
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• 1996

In (GeTe)$_{100-x}$(Sb$_2$Te$_3$)$_{x}$(x=33.5, 50, 66.5, 80 at.%) thin films, the optical properties of amorphous and crystalline thin film, XRD were studied. Also, the application for the phase change optical recording materials with the high stability and rapid erasing ability were studied. In the (GeTe)$_{100-x}$(Sb$_2$Te$_{3}$)$_{x}$ the transmittance was decreased with the increase of x. In all thin films, the transmittance was decreased and the reflectance was increased by annealing and particularly, the reflectance before and after annealing showed the large reflectance ratio. The XRD pattern, it was confined that these change of optical properties was due to the crystallization of amorphous thin films. The reflectance change was investigated using isothermal annealing condition.ion.ion.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2002.11a
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• pp.103-106
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• 2002

We prepared $Co_{77}Cr_{20}Ta_{3}$ thin film with Facing Targets Sputtering Apparatus. which can deposit a high quality thin film CoCrTa magnetic layer for Perpendicular magnetic recording media. In order to obtain Good Crystal orientation of CoCrTa thin films. We prepared Thin Films on slide glass substrate. The thickness of Buffer-layer were varied from 10 to 50 nm and Magnetic layer thickness fixed 100[nm]. input current was varied from 0.2[A] to 0.5[A]. Substrate temperature was varied from room temperature to ${250^{\circ}C}$ respectively. The crystal orientation of the CoCrTa film were examined with XRD. Introduce Buffer-layer thin films showed improvement of dispersion angle of c-axis orientation (${\Delta\theta}_{50}$).

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.34-36
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• 2004

인터넷의 확산과 더불어 인터넷을 이용한 음성전달 기술은 급속히 발전하고 있으며 음성전달 기술을 이용해 개발된 소프트웨어를 통칭해 인터넷 전화라 부른다. 인터넷 전화는 비싼 전화요금 대신 인터넷 사용료나 매우 저렴한 요금으로 음성 대화를 가능하게 한다. 저렴한 요금이라는 큰 장점으로 인해 콜센터나 일반고객들이 인터넷전화를 이용할 가능성이 커지게 되었고 시장의 변화에 따라 녹음장비도 인터넷 상의 음성을 녹음 할 필요성을 가지게 되었다. 본 논문에서는 인터넷 상의 음성전달 기술인 VoIP Protocol H.323 을 지원하는 단말간의 통화를 녹음할 수 있도록 녹음 장비의 핵심인 IP Packet을 Capture 하여 음성데이터를 추출하는 모듈을 구현 하였다.인터넷의 확산과 더불어 인터넷을 이용한 음성전달 기술은 급속히 발전하고 있으며 음성전달 기술을 이용해 개발된 소프트웨어를 통칭해 인터넷 전화라 부른다. 인터넷 전화는 비싼 전화요금 대신 인터넷 사용료나 매우 저렴한 요금으로 음성 대화를 가능하게 한다. 저렴한 요금이라는 큰 장점으로 인해 콜센터나 일반고객들이 인터넷전화를 이용할 가능성이 커지게 되었고 시장의 변화에 따라 녹음장비도 인터넷 상의 음성을 녹음 할 필요성을 가지게 되었다. 본 논문에서는 인터넷 상의 음성전달 기술인 VoIP Protocol H.323 을 지원하는 단말간의 통화를 녹음할 수 있도록 녹음 장비의 핵심인 IP Packet을 Capture 하여 음성데이터를 추출하는 모듈을 구현 하였다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2008.06a
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• pp.445-446
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• 2008

In this paper, we investigated the diffraction grating efficiency on Ag-doped amorphous chalcogenide Ag/AsSeS thin film for used to volume hologram. The film thickness was 2 um and diffraction efficiency was obtained from He-Ne (632.8nm) and DPSS(532nm) (P:P) polarized laser beam on Ag/AsSeS thin films. As a result, for the films, the maximum grating diffraction efficiency using He-Ne laser(632nm) is 0.15%[2000sec]. And then The recording speed of DPSS laser was about 40s which of batter than He-Ne lasers.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2010.11a
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• pp.181-185
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• 2010

The behavior of combustion-induced internal flow of SRM equipped with fin-slot grain and submerged nozzle is very complex and diverse. Cold air-flow test for 2D and 3D scale models of SRM has been done in order to specify the visualization method to analyze particular internal flow patterns such as roll-torque inducing flow. Swirl flow induced by asymmetric vortical tube also has been visualized through employing various light source and recording directions.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1993.05a
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• pp.72-72
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• 1993

Among the various diagnostic methods for the voice disorders, video laryngo-stroboscopy is one of the most practical techniques for clinical examination of the vocal fold vibration. It provides valuable informations about the nature of vocal folds' vibration, the extent of pathologic change and data recording for analysis. To obtain the stroboscopic characteristics of several voice disorders, and apply those informations to the diagnosis and management of disorders, we reviewed the stroboscopic findings obtained from the patients with voice disorders at Voice laboratory, the Institute of Logopedics and Phoniatrics form April 1992 to March 1993.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2007.10b
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• pp.89-93
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• 2007

In the Japanese garden, a unique planting design has been used to improve visual harmony with the surrounding landscape by planting plants around the objects that are not harmonious with surrounding landscape. In this study, physiopsychological effects of plants caused by a traditional planting skill used in Japanese garden was verified in terms of visual relaxation using eye movement recording and semantic differential method. A total of fourteen Japanese volunteers(seven male and seven female) who have normal vision(aged $21{\sim}28$) participated as subjects. Experiment was carried out in the sealed room of Chiba University in Japan. Four different types of scenery models were presented which were created by combination of the three landscape factors of the surrounding background, the object that disturbs visual harmony, and the trees planted for improving visual harmony with the surrounding landscape. In the results, significantly more gaze fixations were measured on the trees than on the object and higher values in positive feelings were recorded for the stimuli with proper planting combination. Our results indicated that proper tree planting can cause physiopsychological relaxation by improving visual harmony with the surrounding landscape and provided new evidence for supporting scientific validity of the traditional planting skills.