• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2007년도 추계학술대회 논문집
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• pp.319-320
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• 2007

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1999년도 제14차 학술회의논문집
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• pp.65-68
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• 1999

In this study, an off-line automatic teaching method using vision information for robotic assembly task is proposed. Many of industrial robots are still taught and programmed by a teaching pendant. The robot is guided by a human operator to the desired application locations. These motions are recorded and are later edited, within the robotic language using in the robot controller, and played back repetitively to perform the robot task. This conventional teaching method is time-consuming and somewhat dangerous. In the proposed method, the operator teaches the desired locations on the image acquired through CCD camera mounted on the robot hand. The robotic language program is automatically generated and transferred to the robot controller. This teaching process is implemented through an off-line programming(OLP) software. The OLP is developed for the robotic assembly system used in this study. In order to transform the location on image coordinates into robot coordinates, a calibration process is established. The proposed teaching method is implemented and evaluated on the assembly system for soldering electronic parts on a circuit board. A six-axis articulated robot executes assembly task according to the off-line automatic teaching.

• 한국정밀공학회지
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• 제19권10호
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• pp.66-76
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• 2002

Automated welding and soldering are an important manufacturing issue in order to lower the cost, increase the quality, and avoid labor problems. An off-line programming, OLP, is one of the powerful methods to solve this kind of diversity problem. Unless an OLP system is ready for the path optimization in welding and soldering, the waste of time and cost is unavoidable due to inefficient paths in welding and soldering processes. Therefore, this study attempts to obtain path optimization using a genetic algorithm based on artificial intelligences. The problem of welding path optimization is defined as a conventional TSP (traveling salesman problem), but still paths have to go through welding lines. An improved genetic algorithm was suggested and the problem was formulated as a TSP problem considering the both end points of each welding line read from database files, and then the transit problem of welding line was solved using the improved suggested genetic algorithm.

• 한국추진공학회지
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• 제13권4호
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• pp.36-44
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• 2009

광학 선형 패터네이터 및 광학 토모그래피 기법을 사용하여 높은 주위 기체 압력 조건에서 분무단면을 측정하였다. 레이저 직선광이 분무 영역을 지나도록 하여 발생하는 Mie 산란 신호 및 직선광의 투과율을 측정하였으며, 이로부터 Beer-Lambert 법칙 및 수학적 단면 재구성 기법을 이용하여 분무 단면의 감쇠 계수 분포를 재구성하였다. 높은 주위 기체 압력 조건에서 광학적으로 밀한 분무가 발생하며, 그 결과 산란 신호의 감쇠 효과가 크게 증가한다. 따라서 미 산란 신호를 이용하는 광학 선형 패터네이터의 경우 감쇠 효과를 완화하는 데 한계를 보인다. 광학 토모그래피의 경우 분무를 통과하는 레이저광의 투과율 정보만을 이용하여 성공적으로 분무 단면을 재구성하였다.

• Journal of Oral Medicine and Pain
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• 제37권1호
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• pp.27-33
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• 2012

피부와 구강점막에서 발견되는 편평태선은 만성 염증성 질환으로 세포매개성 면역반응이 주로 언급되고 있으나 아직 정확한 원인은 밝혀지지 않았다. 따라서 완전한 치료법은 아직 없으며 증상의 완화를 치료목표로 하고 있다. 본 연구에서는 구강편평태선의 일차적인 치료법으로 사용되는 corticosteroid의 두 가지 가글용액의 효과를 비교하였다. 2002년부터 2010년까지 부산대학교 치과병원 구강내과에서 구강편평태선으로 진단받은 환자들 중 corticosteroid 가글용액을 처방받은 환자들 총 180명의 환자기록을 조사하였다. 사용된 두 종류의 가글용액은 각각 dexamethasone(dexamethasone disodium phosphate, 0.05%)과 prednisolone($solondo^{(R)}$)을 포함하는 용액이었으며 약물 사용 후 증상의 완화 및 재발의 시기를 기록하여 분석하였다. Dexamethasone gargle(dexa gargle) 처방군은 33명(여성 25명, 남성 8명), prednisolone gargle(solon gargle)처방군은 147명(여성 114명, 남성 33명)이었으며 환자군의 평균연령대는 50대였다. 약물투여 후 초기 2주이내에 증상이 호전된 경우는 dexa gargle을 사용한 환자군에서 유의성 있게 나타났으나 증상재발의 경우는 두가지 가글용액의 차이가 나타나지 않았다. 구강편평태선 환자에 대한 도포용 스테로이드 가글을 이용한 치료에서 증상의 빠른 호전을 기대하기 위해서는 solon gargle보다는 dexa gargle을 사용할 수 있으나 재발율에 있어서는 두 약물의 차이가 발견되지 않았다.

• Journal of Oral Medicine and Pain
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• 제42권4호
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• pp.102-108
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• 2017

Purpose: Many metal ions released from dental casting alloys have been reported to influence the intraoral symptoms of oral lichen planus (OLP) and burning mouth syndrome (BMS). The aim of this study was to investigate the relationship between salivary metal ion levels and the prosthetic duration as well as to evaluate the time-dependent morbid effects of metal ions in OLP and BMS patients. Methods: Three study groups consist of the following subjects respectively: 17 OLP patients, 12 BMS patients, and 12 patients without oral symptoms. The salivary concentrations of 13 metal ions (copper, cobalt, zinc, chromium, nickel, aluminum, silver, iron, titanium [Ti], platinum, tin, palladium, and gold) were measured by Laser Ablation Microprobe Inductively coupled Plasma Mass Spectrometry. Results: The Ti ions had statistically significant differences among the groups with a prosthetic duration of less than 5 years. There were no significant differences between all ion levels among the groups wearing dental cast alloys for over 5 years. In the BMS group, the level of Ti ions in patients with prosthetic restorations less than 5 years old were significantly high (p<0.05). Conclusions: In the BMS group, 3-60 months during which salivary Ti levels were higher were matched with the duration of burning symptoms ($15.6{\pm}17.1months$). Furthermore, Ti ions were statistically high in the oral cavity of BMS patients fitted with dental casting alloys for 5 years. These results suggest that Ti ions released from dental implants and oral prostheses could attribute to burning sensation of BMS.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
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• pp.724-727
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• 1997

In this paper, we developed a Windows 95 version Off-Line Programming System which can simulate a Robot model in 3D Graphic space. 4 axes SCARA Robot (especially FARA SM5)was adopted as an objective model. Forward kinematics, inverse kinematics and robot dynamics modeling were included in the developed program. The interface between users and the OLP system in the Windows 95's GUI environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by Silicon Graphics, Inc. were utilized for 3D Graphics.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 1999년도 추계학술대회 논문집 - 한국공작기계학회
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• pp.565-570
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• 1999

In this paper, we developed a windows 95 version Off-Line Programming system which can simulate a Robot model in 3D Graphics space. 4axes SCARA Robot (especially FARA SM5) was adopted as an objective model. Forward kinematics, inverse kinematics and robot dynamics modeling were included in the developed program. The interface between users and the OLP system in the Windows 95's GUI environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by silicon Graphics, Inc. were utilized for 3D Graphics.

• Journal of Oral Medicine and Pain
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• 제46권1호
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• pp.1-8
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• 2021

Purpose: The purpose of this study was to assess the relationship between psychological factors and symptoms of oral mucosal diseases by means of the revised version of the Minnesota Multiphasic Personality Inventory (MMPI-2). Methods: Three hundred and eighteen college students in Gyeonggi-do completed the MMPI-2 and a questionnaire related to symptoms of oral mucosal diseases and collected data were analyzed by Student's t-test and one way ANOVA. Results: Subjects who have experienced herpetic stomatitis revealed significantly higher mean values of T-scores than subjects who have not on hypochondriasis (Hs) and hysteria (Hy) clinical scales of the MMPI-2 (p<0.05). In comparison with subjects who have had recurrent aphthous ulceration, subjects who have not had it manifested significantly higher elevations on the schizophrenia (Sc) clinical scale (p<0.05). Subjects who have suffered oral lichen planus (OLP) showed significantly higher mean values of T-scores than subjects who have not on paranoia (Pa) (p<0.05) and hypomania (Ma) (p<0.01) clinical scales. Mean values of T-scores on Ma clinical scale were significantly higher in subjects having experienced glossodynia than in subjects having not experienced (p<0.05). Subjects having felt taste disturbance exhibited significantly higher elevations on Hs (p<0.0001) and Hy (p<0.01) clinical scales compared to subjects having not. Conclusions: Symptoms of oral mucosal diseases such as herpetic stomatitis, taste disturbance, OLP, and glossodynia were found to be related to Hs, Hy, Pa, Ma clinical scales of the MMPI-2. Therefore, comprehensive psychological evaluations of those oral mucosal diseases may be beneficial in a therapeutic approach.

• 한국공작기계학회논문집
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• 제10권3호
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• pp.19-25
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• 2001

In this paper, we developed a Windows 98 version Off-Line Programming System which can simulate a Robot model in 3D Graphics space. 4 axes SCARA Robot (especially FARA SM5) was adopted as an objective model. Forward kinemat-ics, inverse kinematics and robot dynamics modeling were included in the developed program. The interface between users and the OLP system in the Windows 98s GUI environment was also studied. The developing is Microsoft Visual C++. Graphic libraries, OpernGL, by silicon Graphics, Inc. were utilized for 3D Graphics.