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Nonporous Hydroxyapatite를 이용한 전두골 함몰개선의 치험례
양인석,김영균,이철우,유시봉,박정열,Yang, In-Seok,Kim, Young-Kyun,Lee, Chul-Woo,Yoo, Si-Bong,Park, Cheung-Yeoul 대한악안면성형재건외과학회 1992 Maxillofacial Plastic Reconstructive Surgery Vol.14 No.3
This is a case report of correction of traumatic right frontal bone depression. Traditionally, autogenous and homogenous corticocancellous bone have been inlaid or onlaid. This patient who had frontal bone depression of right forehead was operated with an extracranial augmentation procedure using Hydroxyapatite materials. The postoperative course was unremarkble and the patient was satisfied with a good facial contour. Now We will report the results.
양인석(ln Seok Yang),여환호(Hwan Ho Yeo),김영균(Yong Gyun Kim),이철우(Chul Woo Lee),박인순(In Sun Park) 대한구강악안면외과학회 1994 대한구강악안면외과학회지 Vol.20 No.2
This is a retrospective study on 53 facial bone fracture patients with head injuries treated in Chosun university hospital, Department of Oral & Maxillofacial Surgery and Neurosurgery from Jan. 1991 to Dec. 1992, and the obtained results were as follows. 1. Of the 355 patients with facial bone fractures, 63 patients suffered from head injures(17.7%) and male to female ration was 5.7:1. 2. The most frequently affected was midface area(71%) including zygoma(32%), nasal bone(21%), and maxilla(19%). 3. The age frequency was the highest in the third decade(40%). 4. In the zygomatic fracture, the most frequent site was zygomatic arch area(47%), It was Lefort II type fracture(53%) in the maxilla and symphyseal & body area(66%) in the mandible. 5. The most frequent cause was traffic accidents(66%). 6. The most frequently traumatic sign was closed head injury(46%) involving cerebral contusion, subdural hematoma. Intracerebral hemorrage. 7. The most frequently associated injuries were facial laceration(43%), and other associated injuries included spine injury(17%), whole body contusion(16%), chest injury(13%), extremities injury(9%), abdomen injury(2%). 8. Of 25 patients below drowsy mentation, the mean Glassgow Coma Scale score was 10.8. 9. In the classification of clinical mental state by De Jong, alert state was 31 cases, drowsy state 12 cases, semicoma 7 cases, coma 3 cases. 10. GCS score was low in the patients of craniocerebral injury concomittant with combined midfacial bone fracture. 11. The open reduction to the facial bone fractures was performed in about 8 days after the injury in the 13 of total 25 cases(52%) due to neurosurgical problems. 12. The complications were maloccusion(2 cases), malunion(1 case), nonunion(1 case) and deep space infection(1 case), and the complication rate was 19.2%.
양인석 ( In Seok Yang ),김용규 ( Yong Gyoo Kim ),감기술 ( Kee Sool Gam ),이영희 ( Young Hee Lee ) 한국센서학회 2012 센서학회지 Vol.21 No.2
We propose an improved interpolating equation to express temperature-resistance characteristics for modern industrial platinum resistance thermometers (PRTs). Callendar-van Dusen equation which has been widely used for platinum resistance thermometer fails to fully describe temperature characteristics of high quality PRTs and leaves systematic residual when the calibration point include temperatures above 300 °C. Expanding Callendar-van Dusen to higher-order polynomial drastically improves the uncertainty of the fitting even with reduced degrees of freedom of the fitting. We found that in the fourth-order polynomial fitting, the third-order and fourth-order coefficients have a strong correlation. Using the correlation, we suggest an improved interpolating equation in the form of fourth-order polynomial, but with three fitting parameters. Applying this interpolating equation reduced the uncertainty of the fitting to 32 % of that resulted from the traditional Callendar-van Dusen. This improvement was better than that from a simple third-order polynomial despite that the degrees of the freedom of the fitting was the same.
질소의 끓는점에서의 산업용 온도계 비교 교정과 불확도 평가
양인석 ( In Seok Yang ),감기술 ( Kee Sool Gam ),정욱철 ( Wu Kchul Joung ),김용규 ( Yong Gyoo Kim ) 한국센서학회 2013 센서학회지 Vol.22 No.6
We devised calibration procedure for industrial thermometers by a comparison method at the boiling point of nitrogen (~-196°C). The uncertainty of the calibration was 4 mK (k = 2). As experimentally demonstrated in this work, the effect of the atmospheric pressure on the boiling point of nitrogen can be easily detected by the thermometer. Therefore, when the boiling point of nitrogen is used for calibration of thermometer by comparison, either a reference thermometer must be used to provide the reference temperature or the effect of atmospheric pressure should be carefully considered. The use of a copper block with a large thermal mass soaked into the liquid nitrogen was proven to be more reliable, and the stability of the temperature immersed into the copper block was 1.4 mK. The temperatures at the thermometer wells, evaluated by the crossed-measurement method to compensate for the inaccuracy of the thermometers and the linear drift of the temperature of the copper block, were equivalent within 0.23 mK of standard uncertainty.