• 한국진공학회:학술대회논문집
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• 한국진공학회 2015년도 제49회 하계 정기학술대회 초록집
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• pp.171.1-171.1
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• 2015

Carbon nanotube emitters is very promising electron emitter for electron beam applications. We introduced the carbon nanotube electron beam (C-beam) exposure technic using triode structure. As a source, the electron beam emit from CNT emitters placed at the cathode by high electric field. Through the gate mesh, with high accelerating energy, the electron can be extracted easily and impact at the anode plate. For thin film modification, after the C-beam exposure on the amorphous silicon thin film, we found phase changes and it showed a high crystallinity from the Raman measurement. We expect that this crystallized film will be a good candidate as a new active layer of TFT.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2006년도 추계 종합학술대회 논문집
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• pp.642-646
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• 2006

본 연구는 생산 공정의 입출고관리시스템에 관한 연구이다. 기존의 자재 관리 시스템은 바코드를 이용하는 경우가 많지만 대부분의 업체는 많은 불편함을 호소하고 있다. RFID 기술을 입출고관리시스템에 적용하면 자재의 정보를 효율적으로 관리할 수 있고 수작업의 감소로 인해 시간과 비용을 절약할 수 있다. 본 연구는 생산 공정의 입출고관리시스템을 위해 입고 프로세서, 출고 프로세서, 제고 프로세서, 자재소요량프로세서를 설계하였다. 이러한 프로세서를 검증할 수 있도록 사용자 입장에서 평가하여 검증한다.

• 한국추진공학회지
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• 제5권2호
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• pp.8-15
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• 2001

터보기계의 효율 향상을 위한 끊임없는 노력에서 익형 형상 설계는 대단히 중요한 부분을 차지하고 있다. 이와 관련하여 천음속 풍동에서 층류 및 난류 경계층 거동(충격파-경계층 상호작용)에 대한 실험적 연구가 CTA 열전대 측정을 통해 이루어졌다. 압축기 익형에 부착된 열전대 실험 결과는 유동의 복잡성에 기인하는 신호의 불명확성 때문에 해석이 대단히 어려운 점이 있으므로 설계자에게 열전대 신호 특성에 대한 정확한 정보를 주기 위해서 다른 측정장치 결과와 비교 분석을 통한 해석기법 이 개발되었다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.251-256
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• 1993

In KACC'91 and '92 conference, we proposed a method of automatically detecting the shape of the faulty holes in a shadow mask by use of CCD ca.mera and image data processing technic. In this method, two adjoining test areas from one image data. of the shadow mask are taken and comparing the shape of holes in these two areas, we can detect the faults in the shadow mask. In this paper, a method is described by use of spatial filtering of effectively finding the faulty holes from the difference image data between the two tested image data. The main role of the filter is to remove sampling errors occurring at the edge of the holes. And the second role is not only to find the existence of faulty holes but also exactly express the shape of faulty holes. Computer simulations and actual experiments with shadow masks have shown that this method of fault detection is very effective for practical use.

• 대한치과의사협회지
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• 제12권2호
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• pp.107-111
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• 1974

In order to collect some necessary data to promote correcting the toothbrushing technic on the Korean public, the author had examined the number of present teeth on which had cervical abrasion and the most basic home dental care in 2,000 Korean male and female adults from 19 to 52 years in the age. Then, the cervical abrasion experience rate and the cervical abrasion experience teeth rate were calculated and evaluated. The obtained results were as follows: 1. Cervical abrasion experience rate was 32.45% 2. Cervical abrasion experience rate was gradually increased by ageing. 3. Cervical abrasion experience rate in male adults was higher than that in female adults. 4. Cervical abrasion experience rate in the lower jaw was higher than that in the upper jaw. 5. Cervical abrasion experience rate of the teeth at the right side was higher than that of the teeth at the left side. 6. Cervical abrasion experience teeth rate was 3.82%. 7. Cervical abrasion experience rate was highest on the first bicuspid, and followed in the sequence of the second bicuspid, canine, first molar, incisors, and 2nd and 3rd molars.

• 한국게임학회 논문지
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• 제5권2호
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• pp.11-18
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• 2005

카지노에서 성행하고 있는 블랙잭 게임을 이기기 위한 노력이 전세계적으로 경주되어 왔다. 본 논문에서는 하이 로우(high-low) true count 기법 에 의거하여 게임을 유리하게 전개하기 위한 게임 전략을 선보인다. 켈리 기준이 왜 필요하며 그 기준에 의거한 베팅 전략을 강원랜드 블랙잭 규칙을 엄격히 적용하여 공격적 및 보수적인 베팅으로 구분하여 210만슈 이상 시뮬레이션을 수행하였다. 그 결과 공격적인 베팅이 이익면에서는 가장 유리하였으나 반면에 단기간의 위험도는 가장 크다는 사실을 알 수 있었다.

• 치과방사선
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• 제17권1호
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• pp.175-181
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• 1987

The purpose of this study is to know the value of the photographic subtraction technic in the transcranial oblique lateral projection of the TMJ. The author examined the transcranial oblique lateral projection radiographs which comprise 50 cases of 32 persons, compared the transcranial oblique lateral projection films and those subtraction films. The following results were obtained. 1) The condyle at closed jaw position had showed a reversed tone image, but the condyle at the opening position had showed a re-reversed ordinary image. Both condyles had showed one subtraction film because radiographic interpretation of TMJ was easy. 2) On 50 cases of subtraction films, 46 cases had showed same radiographic images compared with trascranial oblique lateral projection films. Four cases (3 cases of erosion, 1 cases of sclerosis) had showed additional changes of images so that capability of interpretation was improved.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1991년도 하계학술대회 논문집
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• pp.548-551
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• 1991

The Sliding Mode Control of Variable Structure System is applied to robot manipulators or servo system for its merits of robustness to variable system parameters and disturbances. But Switching frequency of control input is excessively high during sliding mode operation. In this paper, a new control algorithm usings fuzzy logic is proposed to solve this problem. With the proposed algorithm, a dc motor speed control system has been simulated and the result shows expected performances.

• Journal of Chest Surgery
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• 제6권2호
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• pp.195-202
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• 1973

Two patients were admitted with chief complaints of exertional dyspnea and palpitation respectively. Physical examination showed Grade III and Grade II to III systolic rumbling murmur at apex in each case. Chest X-ray and EKG findings were compatible with mitral insufficiency in both cases. The diseased valves were replaced with Beall mitral valve prosthesis under cardiopulmonary bypass using hemodilution technic. The first patient died of asphyxia due to tracheomalacia complicated after tracheostomy 3 months after operation and the 2nd patient was discharged in good condition one month after operation-Autopsy of the 1st patient showed no thrombus formation, no disc variance, and good epithelization of valve cuffs. In the second case clinical improvement was remarkable with decreased heart size.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.2130-2131
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• 2011

Electric fire breaks out by various causes such as electric short, overload(over current), leakage current, poor contact, static electricity, insulation deterioration, partial disconnection and etc. In this paper, we studied analysis technique for scientific and systematic judgment for distinction of electricity fire existence and nonexistence, and described about electricity fire cause analysis process for collecting physical evidences. We handled external form analysis, Substance extension analysis, X-ray transmission analysis, cross-section analysis, thermal analysis, chemical structure analysis, surface structure analysis, component analysis, electrical properties analysis, and circuit analysis by analysis technique for electricity fire cause judgment. We expect that analysis technic elevation and correct cause of fire analysis of scene of a fire investigators and analysts through this paper which see help.