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수용액에서의 질소산화물 흡수 : 1 . 다공판탑의 흡수효율 1 . Absorption efficiency of No x for a Sieve Tray Column
이후근,박현수,전관식,정명수 한국화학공학회 1986 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.24 No.4
다공판탑을 이용하여 물에 의한 질소산화물의 흡수에 관한 연구를 수행하였다. 질소산화물의 농도, 기체의 유량, 다공판의 기공율의 변화에 따른 질소산화물의 흡수효율을 측정·분석하였다. 질소산화물이 물에 흡수되는 과정은 H₂O와의 화학반응을 수반하여 액상에서 HNO₃와 HNO₂를 생성하고 생성된 HNO₂는 HNO₃와 NO로 분해되며 분해된 NO는 단사이의 공간에서 담체로 사용된 공기중 산소와 반응하여 NO₂로 산화되는 과정이 흡수탑의 단내에서 반복된다고 하여 전개한 흡수모델로부터 얻은 이론값과 실험치를 비교한 결과 비교적 잘 일치하는 경향을 나타내었다. An absorption efficiency of sieve plate column to remove nitrogen oxides with water was studied. The experimental tests were conducted at varying system conditions such as gas concentrations, flowrates as well as sieve porosities. The data collected from experimental measurements were analysed to give an account of nitrogen oxides removal efficiencies. The absorption process was supposed to accompany chemicat reaction of Nox with water to produce HNO₃ and HNO₂ in the liquid phase. The subsequent dissociation of HNO₂ resulting in the formation of HNO₃ and giving off gas product NO, the latter is oxidized in the free boad by O₂of air flow thus completing the process. It is assumed that this process repeats in the course of absorber operation. The validity of the theoretical model proposed in this study was shown by the good agreement with expermental results.
IdMapper: A Java Application for ID Mapping across Multiple Cross-referencing Providers
이후근,김현진,유웅식 한국유전체학회 2009 Genomics & informatics Vol.7 No.4
We developed an identifier mapping application for bioinformatics research in Java programming language. It is easy to use and provides many usability functionalities that are expected as essentials for a professional application. It supports three widely used mapping services and can convert many ids from one source database into many target databases at once. Id mapping across service providers is possible by remapping the resultant ids. Because it adheres to the NetBeans platform architecture, it can be incorporated into other NetBeans platform applications as an id mapping provider without adaption or modification.
이후근(Hoo Geun Lee),조종민(Jong Min Cho) 대한CT영상기술학회 2010 대한CT영상기술학회지 Vol.12 No.1
Purpose Intervertebral foramina disc disease and it’s degeneration cause myelopathy or radiculopathy with lumbar back pain. These makes stenosis or obstruction of nerve root pad1way. It is in1portant structure for the decompression during minimal invasive surgery or surgical operation. We used to two dimensional(2D) sagittal reformation of multi-detector computed tomography(MDCT) helical scan in foraminal stenosis or foraminal disc cases. At this time, We obtain derail informations of intervertebral foramina(IVF) with spine disease and study IVF images by reformation angle. Materials and methods We studied lumbar spine CT(men: 20 cases, average age: 33.8 years) with helical scan using Philips Brilliance 16 channel MDCT, from Jun 2009 to Aug 2009. We examined helical scan and performed 2D sagittal reformation. At this time, We established six reformation angle techniques; midsagittal plane(MSP), L4 pedicle, L4-5 facet, L5 pedicle, L5-S1 facet, S1 pedicle. And we established L4-5, L5-S1 IVF and tested both them with comparison. Image analysis was measured three portions of IVF. We measured superior inferior dimension; length of straight line from upper margin to lower margin in IVF, superior anterior posterior; length of distance in straight line at facet joint level and inferior anterior posterior; length of distance in straight line at posterior body margin. Results As results, 2D sagittal reformation with six reformation angle techniques, case of parallel L5-S1 facer was measured right 41.6, left 42.9° mostly and case of parallel L4 pedicle was measured right 12.2, left 13.7° to bottom. As results, measuring three portions of IVF, in L4-5 IVF, case of parallel L4-5 facet was measured increasing superior to inferior dimension measurement(SID; right 21.86, left 21.61 mm) and case of parallel L5-S1 facet was measured increasing SID(right 22.34, left 22.26 mm) with comparison of parallel midsagittal plane. As results, measuring three portions of IVF, in L5-S1 IVF, case of parallel L4-5 facet was measured increasing SID(right 21.71, left 20.67 mm) and case of parallel L5-S1 facet was measured increasing SID(right 21.66, left 21.00 mm) with comparison of parallel midsagittal plane. Superior anterior-posterior measurement(SAP), inferior anterior-posterior measurement(IAP) of IVF in L4-5, L5-S1 are unremarkable. Conclusion Cases of parallel facet joint are checked increasing SID with comparison other conditions. So we established useful reformation angle techniques that these increased diameter of upper-lower structure of IVF and expanded space of passing nerve root.