The closed solution for the internal electric field and the total charge density has been derived in the drift-diffusion approximation for the model of a single layer organic semiconductor structure characterized by the bulk shallow single trap-charge energy level is presented. On the basis of the published empirical electron mobilities and the diffusion term revoked it is shown that the steady state electron current density within the single layer organic structure may well be pictured in the drift-only interpretation.
COBISS.SI-ID: 23363879
A one-dimensional fluid model was developed for the potential formation in front of a negative electrode that emits monoenergetic electrons and is immersed in plasma tha contains a mono-energetic electron beam perpendicular to the surface of the electrode. For the description of the step of the electron current at the beam energy tanh(x) was used. The model explains triple floating potential of an electron emitting electrode. Hypothesis is presented that this phenomenon does not depend on the details of the physical mechanism of the electtron emission.
COBISS.SI-ID: 7590996
A one-dimensional fluid model was developed, which was used for the anlysis of the potential formation in front of an electron emitting electrode immersed in a plasma that contains a mono-energetic electron beam with an isotropic velocity distribution. Our model explains triple floating potentials of electron emitting electrodes, which were observed experimentally, but so far the explanation has been only qualitative. The new model offers a quantitative explanation taking into account space charge effects of emitted electrons.
COBISS.SI-ID: 7855956
Imaging can provide quantitative assessment of radiation-induced normal tissue effects. Identifying an early sign of normal tissue damage with imaging would have the potential to predict organ dysfunction, thereby allowing reoptimization of treatment strategies based on individual patients' risks and benefits. Early detection with noninvasive imaging may enable interventions to mitigate therapy-associated injury before its clinical manifestation. Furthermore, successive imaging may provide an objective assessment of the impact of such mitigation therapies.
COBISS.SI-ID: 24433191
This work deals with an important, albeit often neglected issue in Positron Emission Tomography, the so-called mid-frame approximation. The paper first provides the theoretical basis to analyze the issue from a mathematical point of view. Then it assesses the errors which are obtained using simplified mid-frame approximation approaches, using simulated data.
COBISS.SI-ID: 24421927