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키넥트 센서를 이용한 실용적인 3차원 안면 진단기 연구
장준수(Jun-Su Jang),도준형(Jun-Hyeong Do),김장웅(Jang-Woong Kim),남지호(Jiho Nam) 한의병리학회 2015 동의생리병리학회지 Vol.22 No.2
Facial diagnosis based on quantitative facial features has been studied in many Korean medicine fields, especially in Sasang constitutional medicine. By the rapid growing of 3D measuring technology, generic and cheap 3D sensors, such as Microsoft Kinect, is popular in many research fields. In this study, the possibility of using Kinect in facial diagnosis is examined. We introduce the development of facial feature extraction system and verify its accuracy and repeatability of measurement. Furthermore, we compare Sasang constitution diagnosis results between DSLR-based system and the developed Kinect-based system. A Sasang constitution diagnosis algorithm applied in the experiment was previously developed by a huge database containing 2D facial images acquired by DSLR cameras. Interrater reliability analysis result shows almost perfect agreement (Kappa = 0.818) between the two systems. This means that Kinect can be utilized to the diagnosis algorithm, even though it was originally derived from 2D facial image data. We conclude that Kinect can be successfully applicable to practical facial diagnosis.
전기투석 시스템에서 고농도 수용액의 한계 농축에 대한 연구
장준수 ( Junsu Jang ),김범주 ( Bumjoo Kim ) 한국공업화학회 2023 공업화학 Vol.34 No.1
전기투석에서 농축 공정은 전기 에너지를 이용하여 전해질 수용액 상의 이온의 농도를 증가시키는 기술로, 이온교환막에서 일어나는 이온과 물 분자의 전달 현상에 대해 많은 연구들이 진행되고 있다. 본 연구에서는 전기투석 시스템에서 고농도 전해질 수용액의 전기 삼투에 의한 농축 현상에 대한 실험을 통해 한계 농축 현상에 대한 변수를 분석한다. 두 가지 전해질 수용액(NaCl 2M / 4M)에 대해 이온과 물 분자의 투과량을 측정해 전기 삼투 현상을 분석하였고, 농축조 대비 탈염조의 부피 비에 따른 한계 농축 현상을 관찰하였다. 실험 결과, 전해질 수용액의 농도가 높을수록 전기 삼투가 감소하였고, 부피 비가 클수록 탈염수의 농도가 높게 유지되기 때문에 한계 농축 농도가 증가하고 비에너지 소모가 감소됨을 확인하였다. The salt concentration process in electrodialysis, which uses electrical energy to enhance ion concentrations in an aqueous electrolyte solution, has been studied on the transfer phenomenon of ions and water molecules over the ion exchange membrane. In this paper, we investigated various parameters for limiting concentration of electrolyte solution and the electroosmosis phenomenon in an electrodialysis system by varying salt concentration of electrolyte solution. The electroosmotic water transport was analyzed by measuring the ions and water fluxes in electrolyte solutions having two different NaCl concentrations (NaCl 2M/4M), and concentration change was observed for various volume ratios of the diluted reservoir to the concentration one As a result, it was found that the higher concentration of the aqueous electrolyte solution, the lower electroosmosis, and the higher volume ratio led to a higher concentration in the dilute reservoir, so the limiting concentration was enhanced and the specific energy consumption decreased.