woman, twenty-two years of age, who was delivered on July 4th, 1892, of her first child. July 8th she practised coitus, and was again delivered, March 10th, 1893, of a healthy child. Calculating from the date of coitus, the second pregnancy lasted two hundred and forty-three days, that is, twenty-seven days less thau the normal. This case has caused considerable discussion. Ovulation must have ...

accurate interpretation of radiographic images is dependent on viewing conditions. recently the number of radiology departments has been increased so it needs to use a workstation for reporting. the aim of this study was assess monitor performance and the effect of viewing conditions on object detection. this investigation aimed to quantify the effects of changes in box brightness and ambient l...

The state estimation of a quantized system (Q.S.) is a challenging problem for designing feedback control and model-based fault diagnosis algorithms. The core of a Q.S. is a continuous variable system whose inputs and outputs are represented by their corresponding quantized values. This paper concerns with state estimation of a Q.S. by a qualitative observer. The presented observer in this pape...

In this paper, an observer based fuzzy adaptive controller (FAC) is designed fora class of large scale systems with non-canonical non-affine nonlinear subsystems. It isassumed that functions of the subsystems and the interactions among subsystems areunknown. By constructing a new class of state observer for each follower, the proposedconsensus control method solves the problem of unmeasured sta...

this paper presents a new observer-based control scheme for a class of nonlinear systems. in the proposed method, nonlinear observer and twisting algorithm controller are employed to realize a sensor-less control strategy for complex systems which makes use of non measurable process information instead of installing as many sensors as possible. due to lack of availability of the complex system ...

This paper presents a new observer based fuzzy terminal sliding mode controller design for a class of fractional order nonlinear systems. Robustness against uncertainty and disturbance, the stability of the close loop system and the convergence of both the tracking and observer errors to zero are the merits of the proposed the observer and the controller. The high gain observer is applied to es...

more thau an hour at a time, and sometimes she lias been obliged to use the urinal every half hour or so. Mrs. B. had been under the care of several physicians, regular aud irregular. Although naturally of a placid, happy disposition, her face showed marks of suffering and anxiety. Her pulse was 85 ; the temperature 99,5?. Her urine, drawn with a soft catheter, contained pus, mucus, and crystal...

this study aimed to evaluate the reliability factors, and identify causes of error in direct anthropometry method. after training three beginner anthropometrists and following the instructions of anthropometric standards, 48 body dimensions of 42 male students were measured three times. in other words, the physical dimensions of each subject were measured for 9 times. all participants were wear...

K e y w o r d s O u t p u t regulation, Observer design, Exponential observers, Discrete-time systems. 1. I N T R O D U C T I O N O u t p u t regula t ion problem is the problem of controlling the ou tpu t of a control system so as to achieve asympto t i c t racking of prescribed reference t ra jec tor ies a n d / o r asympot ic rejection of undesired d is turbance signals. I t is a central pro...