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Comparative study of p-type 4H-SiC epitaxial layers grown simultaneously on two different 4H-SiC substrates, namely n-type and semi-insulating have been done by different structural, optical and electrical experimental techniques.
The Jagiellonian-PET (J-PET) collaboration is developing a novel TOF-PET tomography scanner based mainly on the timing of signals instead of their amplitudes for the reconstruction of Lines-of-Response, therefore a very precise time resolution is one of the main challenges of the project. The novelty of the concept lies in employing long strips of plastic scintillators instead of crystals as detectors...
This paper describes the design of the wireless sensor network node (WSN) for distributed active vibration control (AVC) system for the automotive application. The approach of the system is presented in details. A WSN node using one piezoelectric element provides several features (sensing, shunting and energy harvesting). Integration of the vibration sensing capability for active vibration control...
This paper describes design of the wireless sensor network (WSN) node for distributed active vibration control system for the automotive application. The node using one piezoelectric element provides several features (sensing, shunting and energy harvesting). The implementation of the WSN node with designed SSHI circuit is presented. Vibration measurements and shunting the piezoelectric element capabilities...
Nowadays, much attention is paid to thin films surface wettability parameter. Hydrophobic coatings are well used for water repellant materials, while hydrophilic thin films are often used in anti-fogging applications. Titanium dioxide is one of the best materials for thin film coatings applications, due to its electrical, optical, chemical and physical properties such as photocatalysis, high transparency...
In this work structural properties of TiO2 thin films doped with different amounts of Nd have been presented. Thin films were deposited on silicon substrates using high energy reactive magnetron sputtering process and for the measurements TiO2 doped with 0.84 at. % and 8.51 at. % of Nd have been selected. Diversification of the thin film surface was investigated using atomic force microscope. The...
We observed second harmonic generation from semiconducting CdTe(CdS) nanocrystals with a diameter below 15 nm. Their submicron size, high nonlinearity and orientation sensitive SHG response are adapted for ultrafast, high-resolution probing of optical near-fields.
In nuclei of eukaryotic cells, DNA molecules are tightly packed up to a concentration level of several hundreds of mg/ml. At high concentration, in order to decrease the intermolecular volume the DNA strands self- organize and form domains containing molecules oriented along preferential directions. These self-organizing properties give rise to various liquid crystalline phases, similar to the process...
We observed second harmonic generation from semiconducting CdTe/CdS nanocrystals with a diameter below 15 nm. Their submicron size, high nonlinearity and orientation sensitive SHG response are adapted for ultrafast, high resolution probing of optical near-fields.
In the article a post of the radio monitoring leaning against the receiver and a direction finder of the Rhode&Schwarc company as the element were described of system of the electronic diagnosis. The post was widened for the computer recording of radio emissions. At the Academy works on choice last for the navy methods of the recording of sound. At the same time abilities of controlling of a few...
Detecting the presence of buffer overflow attacks in network messages has been a major focus. Only knowing whether a message contains an attack, however, is not always enough to mitigate the threat. It may also be critical to know what it does. Unfortunately, shell code is written in low-level assembly language, and can be obfuscated. The current method of analyzing shell code, manual reverse engineering,...
In measuring the field dependence of DC conductivity in amorphous dielectrics one often finds, that the logarithm of current plotted vs. square root of electric field yields a straight line. This effect may be due to decrease of occupation probability of a trap, charged when empty, under the influence of the external field. Frenkel and Poole (1) discussed this phenomenon in terms of the Coulomb interactions...
Poly (N-vinylcarbazole), PVK, is a condensed ring heteroaromatic polymeric photoconductor. It has been the subject of many recent investigations, particularly in relation to usage in electrophotography. Its photoconductive properties are fairly well known. However, only a minimum effort has been made to determine its trap structure.1
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