Sökresultat

Even though the development of B lymphoid cells from hematopoietic stem cells is one of the most carefully investigated models of cell differentiation in adult mammalians, a set of recent findings has to a large extent increased our understanding for how B lymphoid commitment is achieved. These include the identification of IKAROS, PU.1 and E2A as transcription factors responsible for lymphoid lin

This thesis discusses a number of robot touch perception systems. All these systems are self-organizing and model different aspects of human touch perception. The thesis starts out with introductions to the anatomy and the physiology of the human hand. It proceeds with an overview of the human touch perception from both a neurophysiological and a behavioural perspective. Then related robotic resea

A presentation of two Danish books on biology and humansities.

The torque-maximizing field-weakening control scheme proposed by Kim and Sul is developed further. The performance under imperfect field orientation conditions is investigated, and it is shown that an overestimated-rather than an underestimated-model leakage inductance should be used. A slightly modified algorithm, which offers better robustness and reduced computational complexity, is presented.

Abstract Knowledge of glomerular filtration rate (GFR) is required to detect and follow impairment of renal function, to allow correct dosage of drugs cleared by the kidneys, and for the use of nephrotoxic contrast media. Correct determination of GFR requires invasive techniques, which are expensive, slow and not risk-free. Therefore, GFR-prediction equations based solely upon cystatin C or creati

Background: The hyperdense middle cerebral artery sign (HMCAS) is one of the early changes seen on the computed tomography in acute ischemic stroke of MCA territory. Aims: To evaluate the reliability of subjective evaluation of HMCAS on CT performed at multidetector CT (MDCT) and evaluated in the Picture Archiving Communication Systems, to define objective criteria for HMCAS and to find out if the

The issues involved in supporting real-time wireless Internet services go beyond the problem of forwarding packets to the correct destination of a mobile host. These issues include handover latency, availability of network resources after moving, and a proper charging and accounting infrastructure. Through a survey of current research in these areas, we discuss various concerns of integrating mobi

Loss of cognitive function and hypertension are two common conditions in the elderly and both significantly contribute to loss of personal independency. Microvascular brain damage - the result of age-associated alteration in large arteries and the progressive mismatch of their cross-talk with small cerebral arteries - represents a potent risk factor for cognitive decline and for the onset of demen