normal 0 false false false en-us x-none ar-sa spinal hematoma is a rare and usually severe neurological disorder that, without adequate treatment, often leads to death or permanent neurological deficit. epidural as well as subdural and subarachnoid hematomas have been investigated in some studies. a 66-year-old man referred to our hospital because of acute onset paraplegia and incontinency star...

The time-optimal trajectory for an airplane from some starting point to some final point is studied by many authors. Here, we consider the extension of robot planer motion of Dubins model in three dimensional spaces. In this model, the system has independent bounded control over both the altitude velocity and the turning rate of airplane movement in a non-obstacle space. Here, in this paper a g...

Abstract Exercise addiction (EA) involves excessive concerns for exercise routines, an abusive practice, and the inability to control one’s own behavior, as well presence of psychological processes that are typical behavioral addictions such abstinence. EA is further associated with alteration individual’s personal, social, professional functioning a higher risk several pathologies, including p...

in this paper, lie group structure and lie algebra structure of unit complex 3-sphere     are studied. in order to do this, adjoint representations of unit biquaternions (complexified quaternions) are obtained. also, a correspondence between the elements of     and the special complex unitary matrices    (2) is given by expressing biquaternions as 2-dimensional bicomplex numbers    .  the relat...

If a dynamic system has active constraints on the state vector and they are known, then taking them into account during modeling is often advantageous. Unfortunately, in constrained discrete-time state-space estimation, equality constraint defined for parameter matrix not as commonly found regression problems. To address this problem, firstly, we show how to rewrite matrices be estimated. Then,...