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DC Servo Motor를 이용한 초정밀 위치결정기구의 컴퓨터 시뮬레이션 및 제어성능 평가
박기형,김재열,윤성운,이규태,곽이구,송인석,한재호 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.6
Recently, High accuracy and precision arc required in various industrial field especially, semiconductor manufacturing apparatus, Ulna precision positioning apparatus, Information field and so on. Positioning technology is a very important one among them. As such technology has been rapidly developed, this field needs the positioning accuracy as high as submicron. It is expected that the accuracy of 10nm and 1nm is required in precision work and ultra precision work field, respectively by the beginning of 2000s. High speed and low vibration arc also needed. This work deals with the design method and control system of Ultra precision positioning apparatus. Control perfor-mance and stability analysis were performed in advance by modeling and designing the controller with Simulink.
Micro-Bumintest 및 방사면역 측정법을 이용한 미세단백뇨의 진단 및 비교
송소향,윤석중,윤건호,강무일,홍관수,차봉연,이광우,손호영,강성구 대한내과학회 1992 대한내과학회지 Vol.42 No.1
이상과 같이 미세단백뇨의 측정에 있어서 소변으로의 크레아티닌 배설양을 고려하여 보정한다면 spot urine만으로도 일정시간 동안 모든 소변이나 24시간 소변에서의 미세단백뇨량과 유사한 결과를 얻을 수 있을 것 같으며, spot urine을 대상으로 간편하고 신속하게 Micro-Bumintest를 실시하여 미세단백뇨 유무를 판단함으로써 당뇨병성 신증의 조기발견, 예방 및 치료에 도움을 줄 것으로 생각된다. Microalbuminuria may be a useful predictor of nephropathy in diabetes. Moreover, recent interventional studies have demonstrated that intensive insulin regimens may correct the increased albumin excretion in diabetes. Studies of microalbuminuria have relied on either spot urine samples, timed collection, or 24 hr urine collections. Although the validity of single-void urine samples in quantitating gross proteinuria has been established, confirmation of the utility of a single-void specimen in estimating microalbuminuria has been performed. We conducted a study to determine whether singlevoid urine samples (corrected for creatinine) can be used to estimate 24 hr excretion and to evaluate the performance of Micro-Bumintest in screening for microalbuminuria in diabetic patients. Also, the results of the Micro-Bumintest were compared with quantitative RIA determinations of the urinary microalbumin concentration. The results were as follows: 1) The age, duration of the diabetes, degree of diabetic control measured by HbA_(IC), serum creatinine and microalbuminuria by radioimmunoassay are shown in Table 1. 2) The overall correlation of spot urine sample results expressed as microgram albumin per milligram creatinine (r=0.54, p=0.0001) and with 24 hr urine microalbuminuria expressed as microgram per milligram (r=0.55, p=0.0001) was good (Fig. 2, 3). 3) When 20 mg/min (24 hr albumin excretion) was used as the upper limit of normal, the sensitivity and specificity of Micro-Bumintest in 24 hr urine specimen were 93.8% and 64.7%, respectively (Table 2). 4) BMI, serum creatinine, and microalbuminuria were significantly associated between positive and negative Micro-Bumintest results (p<0.01, p<0.05, p<0.01) (Table 3). In summary, spot urine specimens are useful in estimating the excretion in place of 24 hr urine collections, and the Micro-Bumintest is a reasonable screening method for microalbuminuria.