With the existing GPR systems it is possible to detect the structural irregularities several meters under the earth surface or behind the wall. Unfortunately, the image reconstruction is slow and not reliable. It takes several minutes and the obtained image does not allow judging what type of object is under the earth surface. We therefore developed a new neural network based algorithm, which reduced the time necessary to evaluate the radar image to less than one minute and allows for further significatn reduction of this time with implication of this algorithm in the FPGA circuit.
COBISS.SI-ID: 22973223
14N NQR frequencies and spin–lattice relaxation times were measured in technologically important 5-aminotetrazole and 5-aminotetrazole monohydrate at different temperatures between 77 K and 300 K. Five NQR triplets frequencies were found for the five inequivalent nitrogen atoms in each compound between 0.7 MHz and 4 MHz. Assignment of the frequencies to atomic positions was made and the results are analysed in relation to the molecular chemical bonds and possible H-bonds in the crystal structures.
COBISS.SI-ID: 15286873
The field application of a 14N nuclear quadrupole resonance (NQR) detector needed for the detection of different explosives, including trinitrotoluene (TNT), requires the examination of the distribution of 14N NQR lines stemming from the monoclinic and/or orthorhombic modifications of TNT, as well as from a mixture of both. In this work, 30 different TNT samples up to 70 years old were measured. The main result of this study is that the measured 14N NQR spectrum is strongly influenced by the environmental conditions to which the explosive was subject during its history.
COBISS.SI-ID: 15313753
The surface-spin magnetism of the antiferromagnetic (AFM) material NiO in nanoparticle and bulk morphology was investigated by magnetic measurements. Performing experiments on the NiO nanoparticles of different sizes and bulk NiO grains, we show that coercivity enhancement and hysteresis loop shift in the fc experiments, considered to be the key experimental manifestations of multisublattice ordering and the EB effect, are true nanoscale phenomena only present in the nanoparticles and absent in the bulk.
COBISS.SI-ID: 22587943
We present a concept of a new kind of memory element, a thermal memory cell. Thermal inscription of information employs a specific temperature-time profile that involves continuous cooling and isothermal waiting time periods in the absence of any external magnetic or electric field. Our storage media are magnetically frustrated solids. Besides for data storage, the concept may be employed for secure data transfer and for retrieving cosmological information from extraterrestrial dust particles.
COBISS.SI-ID: 22832167