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안면 비대칭의 평가를 위한 기준에 관한 정보 두부 방사선 계측학적 연구
백선호,안병근,김선해,손홍범,한호진,강수만 대한치과교정학회 1993 대한치과교정학회지 Vol.23 No.1
This study was undertaken to investigate the middle having the least difference between the right and left structures among the lines that had been used in the study of the craniomaxillofacial asymmetry. The sample of this study consisted of twenty six Korean girls(average 18.9 years old) having normal facial appearance and occlusion. On the frontal cephalometric films of the sample, we divided the whole craniomaxillifacial area into four portions, i.e., cranial, upper facial, lower facial, and dental portion. So, we have found the midlines having the least difference in the whole craniomaxillofacial area itself, and in the each divided four portions, furtherly in the other portions from aimed portion. The findings were as follow : 1. In the whole craniomaxillofacial area, the connecting line between crista galli and anterior nasal spine and the perpendicular bisecting line between right and left foramen rotundrums were suitable for the midline. 2. In the cranial portion, established all six lines were suitable for midlines. In the other portions, the perpendicular bisection line between both condylion, the line passing the contact point between right and left mandibular central insisiors among the perpendicular lines between right and left mandibular central incisial tips were suitable midlines for evaluating the asymmetry of cranial portion. 3. In the upper facial portion, the perpendicular bisecting line between right and left zygions was the most suitable midline. In the other portions, the line between the crista galli and the most superior point of the odontoid process, the perpendicular bisecting line between right and left gonions, the perpendicular bisecting line between right and left condylions, and perpendicular bisecting line between right and left foramens rotundum were suitable midlines for evaluating the asymmetry of the upper facial portion. 4. In the dental portion, the perpendicular bisecting lines between right and left buccal cusps of both maxillary first molars and between right and left mandibular first molars were suitable midlines. In the other portions, the perpendicular bisecting line between right and left landmarks crossing the lesser wing of the connecting line between crista galli and prosthion were suitable midlines for evaluating the asymmetry of dental portion. 5. In the lower facial portion, the perpendicular bisecting lines between right and left condylions and between right and left gonions were suitable midlines. In the other portions, the line between the crista galli and anterior nasal spine, the perpendicular bisecting line between right and left foramen rotundums, and the perpendicular bisecting lines between right and left buccal cusps of both mandibular first molars and between right and left maxillary first molars were suitable midlines for evaluating the asymmetry of the lower facial portion.
홍영습,김정만,김성률,정갑열,김준연,김병권,담도온 동아대학교 부설 산업의학연구소 1997 산업의학연구소 논총 Vol.- No.3
In order to study the effect of welding fume exposure upon the pulmonary function test, we examined 131 shielded arc welding workers, and 152 CO₂arc welding workers as cases and 177 control workers for their general characteristics, and forced vital capacity (FVC), forced expiratory volume in one second (FEV 1.0), forced expiratory volume in one second as a percent of FVC (FEV1.0%), and maximal mid-expiratory flow (MMF) were obtained from the spirogram. In shielded arc welding group and CO₂arc welding group, FVC,FEV 1.0,FEV 1.0%, and MMF were significantly decreased than control group, especially marked in the MMF finding. The distribution of workers below normal range was as follows: in the shielded arc welding group, 2 workers(1.5%) for FVC, 17 workers(13.0%) for FEV 1.0, 5 workers(3.8%) for FEV 1.0, 28 workers(21.4%) for MMF, and in the CO₂arc welding group, 3 workers(2.0%) for FVC, 25 workers(16.4%) for FEV 1.0, 8 workers(5.3%) for FEV 1.0%, and 37 workers(24.3%) for MMF, and significant increase by exposure duration was found in MMF. The distribution of workers who had ventilation impairment was as follows: 5 workers(3.8%) for obstructive type, 2 workers(1.5%) for restrictive type in the shielded arc welding group, and 7 workers(4.6%) for obstructive type, 2 workers(1.3%) for restrictive type, and 1 worker(0.6%) was combined type of the CO₂arc welding group. In the respect of these results, the significant pulmonary function and ventilatory impairment were observed in welding fume exposed workers who had not abnormal finding in chest X-ray, and MMF considered as the most sensitive pulmonary function index by welding fume exposure. Therefore even if it is hard to doing pulmonary function test in the first health examination of workers according to the Industrial Safety Health Act in the welding fume exposure workers, it is desirable to consider doing PFT. Also evaluating the ventilation impairment, it is necessary to observe the change of MMF that marker of effort independent portion.
An Intelligent control of Non-holonomic Mobile Robot Based on Fuzzy Perception
Byoung-Kyun Shim,Jun-Hong Kim,In-Man Park,Sung-Hyun Han 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
This paper present the theoretical development of a complete navigation problem of a non-holonomic mobile robot by using sonar sensors. To solve this problem, a new method to compute a fuzzy perception of the environment is presented, dealing with the uncertainties and imprecision from the sensory system and taking into account nonholonomic constraints of the robot. Fuzzy perception, fuzzy controller are applied, both in the design of each reactive behavior and solving the problem of behavior combination, to implement a fuzzy behavior-based control architecture. Different experiments in populated environments have proved to be very successful. Our method is able to guide the KUM-Robo safety and efficiently during long experimental time.
김병권,김정만,홍영습,정갑열,김준연,김성률,나서희 동아대학교 부설 산업의학연구소 1997 산업의학연구소 논총 Vol.- No.3
We experienced a case of nephropathy in chronic lead poisoning The patient was 43-year-old male who has been working in secondary lead smelting plant for 14 years. On admission, blood pressure was 160/90 mmHg and the others were non-specific. In past history, he received chelating agent administration for lead poisoning irregularly and medicated for gout, and the blood lead concentration was 180.0 ㎍/dl on 2 months before admission. Smoking habit has been 1 pack per day for 15 years and drinking habit has been 1 bottle of Soju per day but less now. In liver function test, AST/ALT were 27/28 IU/l and γ-GT was 456 IU/l. In blood test, Hb : 11.5 g/dl, Hct : 34.0% and basophilic stipplings were found in peripheral blood smear. Chest PA was normal and abdominal ultrasonographic finding was non-specific except fatty liver. In the test of lead exposure indices, PbB : 83.0 ㎍/dl, PbU : 28.3 ㎍/l, and blood ZPP was 300.0 ㎍/dl. And in renal function test, BUN : 31.4 ㎎/dl, blood creatinine : 2.7 ㎎/dl, blood uric acid : 9.1 ㎎/dl, urinary albumin : 100.0 ㎎/g creatinine, urinary α-microglobulin : 120.5 ㎎/g creatininte, urinary β₂-microglobulin : 183.8 ㎍/g creatinine, and 24 hours urinary creatinine clearance was 31.9 ml/min. The ultrasonoguided renal biopsy showed the global sclerosis of glomerulus, moderate atrophy and loss of tubule, and interstitial fibrosis in light microscopy.