• Korean Architects
• /
• s.470
• /
• pp.94-96
• /
• 2008

• Applied Chemistry for Engineering
• /
• v.9 no.1
• /
• pp.6-12
• /
• 1998

A FET(Field Effect Transistor) type dissolved $CO_2$ sensor based on Severinghaus type $CO_2$ sensor was fabricated by the photolithographic process. The sensor consists of Ag/AgCl reference electrode and membranes (hydrogel membrane and $CO_2$ gas permeable membrane) on the pH-ISFET base chip. Ag/AgCl reference electrode was fabricated as follows. Ag layer was thermally evaporated and then its upper surface was chemically chloridized into the AgCl. The hydrogel used as an internal electrolyte solution was fabricated by a photolithographic method using 2-hydroxyethyl methacrylate(HEMA) and acrylamide. $CO_2$ permeable membrane on the top of the hydrogel layer was formed by photolithographic process with UV-oligomer. The FET type $pCO_2$ sensor fabricated by photolithographic method showed good linearity within the concentration range of $10^{-3}{\sim}10^0mole/{\ell}$ of dissolved $CO_2$ in aqueous solution with high sensitivity.

• The korean journal of orthodontics
• /
• v.35 no.5 s.112
• /
• pp.341-350
• /
• 2005

The Purpose of this study was to compare the degree of vortical head rotation and to evaluate the reproducibility of natural Head posture (NHP) according to two guiding methods, the head posture aligner (HPA) method and the solf balance posture (SBP) method. The subjects consisted of 30 adults. On the first day. lateral and frontal cephalometric radiographs were obtained through the two guiding methods. One mouth later. lateral and frontal cephalometric radiographs were obtained again through both guiding methods. The degrees of vertical head rotation of both guiding methods were compared and the reproducibility was evaluated for each guiding method. A comparison of the degrees of vortical head rotation for the two methods revealed that the vertical head posture was lower in the SBP method than in the HPA method by an average of $2.79^{\circ}$. All measurements obtained using the HPA and SBP methods with a time interval of one north did not show any significant difierence in lateral and frortal cephalometric radiographs. The results of the present study suggest that the SBP method may be used as an alternative to the HPA method in case the HPA method can not be applied.

• Nuclear industry
• /
• v.6 no.4 s.38
• /
• pp.42-48
• /
• 1986

Manhattan프로젝트 보고서이기도 한 Katz와 Rabinowitch의 'The Chemistry of Uranium'에서는 우라늄발생 분광스펙트럼에 대한 흥미있는 사진을 게재하였는데 이 사진은 동위체가 빛에 의해 분리될 가능성을 시사하고 있는 것으로 평가되었다. 다음 내용은 최근 각국이 개발에 참여하고 있는 레이저를 이용한 동위체분리법의 소개이다.

• Venture DIGEST
• /
• s.35
• /
• pp.18-19
• /
• 2003

시간이 한번 스치고 지나간 것들 속에서 한국인의 심성이라는 섬세한 정신의 직물을 짜온 사진작가가 한 명 있다. 김대벽씨가 바로 그다. 그는 사력(寫歷)만 얼추 따져봐도 불혹의 세월을 훌쩍 넘게 국토를 떠돌며 고풍스런 역사의 흔적들을 기록하고 증언해왔다.

• The Journal of the Korean dental association
• /
• v.27 no.8 s.243
• /
• pp.691-695
• /
• 1989

Raper가 1925년 소개한 교익방사선사진 촬영법은 나름대로의 독특한 특성을 갖고 있으므로 적절히 이용한다면 환자진료에 많은 도움을 받을 수 있을 것으로 생각되어 재조명해 보고자 한다.

• The Optical Journal
• /
• s.128
• /
• pp.66-69
• /
• 2010

황금비율은 가장 조화롭고 균형 잡힌 아름다움을 만들어내는 비율로서 회화나 사진 같은 시각예술분야에서 사용되고 있다. 이번호에서는 가장 기본적인 황금분할 법칙과 이를 응용한 삼분할법, 여백과 공간 등을 활용한 안정적인 구도를 잡는 법에 대해 알아보자.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
• /
• 2002.04a
• /
• pp.67-75
• /
• 2002

Digital photogrammetry is one of the powerful tools for surveying in more perceptual ways and exploiting the continuously developing computer technology. Nowadays, digital photogrammetry is being used for a number of industrial measurements and inspections but the automation aspect of this technique is not fully developed yet. Photogrammetric work, which is obtained through usual workflow, delays for a big amount of CGP surveying, interpretation and cadastral information. Therefore through studying ways of reducing the volume of photogrammetric works, financial opportunities for digital photogrammetry can be found. This research is focused on the development of the new workflow and study algorithm in digital photogrammetry. Using this result we can reduce financial expenses and improve technologies of topographic and cadastral plans creation.

• Journal of Korean Society for Geospatial Information Science
• /
• v.5 no.2 s.10
• /
• pp.99-110
• /
• 1997

Image matching to determine the conjugate points in stereo photos is the one of the most important subject in digital photogrammetry and many researches In digital photogrammetric field are on going to automate the image matching process. In this study, we analyzes the effect of allowable correlation coefficient, which controls the accuracy in areal based image matching, on the accuracy of digital photogrammetry. So, some areal based matching methods such as image correlation coefficient matching, image Pyramid matching and interest point matching, are implemented, and the effect of allowable correlation coefficient on accuracy of digital photogrammetry in each method is analyzed. As a result of this study, a method to determine the optimal correlation coefficient is presented.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.38 no.4
• /
• pp.305-315
• /
• 2020

The purpose of this study is to compare algorithms of single photo resection, which determines the exterior orientation parameters used in fields such as photogrammetry, computer vision, robotics, etc. To this end, the algorithms were compared by generating experimental data by simulating terrain based on a camera used in aerial and close-range photogrammetry. Through experiments on aerial photographic camera that was taken almost vertically, it was possible to determine the exterior orientation parameters using three ground control points, but the Procrustes algorithm was sensitive to the configuration of the ground control points. Even in experiments with a close-range amateur camera where the attitude angles of the camera change significantly, the algorithm was sensitive to the configuration of the ground control points, and the other algorithms required at least six ground control points. Through experiments with two types of cameras, it was found that cosine lawbased spatial resection shows performance similar to that of a traditional photogrammetry algorithm because the number of iterations is short and no explicit initial values are required.