Henryk Noga

Germanium modified BaTiO3 as a promising electroceramics

ABSTRACT The polycrystalline sample of BaTi0.95Ge0.05O3 was prepared by solid-phase reaction using a conventional method. The morphology of investigated sample was characterised by scanning electron microscopy (SEM). The results allowed to determining the stoichiometry of the material and evaluate their microstructure. High quality samples were investigated, the grains are well shaped without of a glassy phase. The dielectric properties of the BaTi0.95Ge0.05O3 ceramics were determined. The results were compared with these ones obtained for pure BaTiO3. The obtained data indicated that the substitution of Ge+4 ions had an influence on the values of the real (ϵ′) and imaginary (ϵ″) parts of electric permittivity.

Investigation of mechanical and electrical properties of Li doped sodium niobate ceramic system

ABSTRACT The Na0.96Li0.04NbO3 ceramic solid solution was prepared by means of a two-stage hot-pressing technology. The X-ray diffraction analysis showed the formation of a single perovskite phase with an orthorhombic symmetry in the investigated composition. The microstructure and EDS measurements were performed. They confirmed the high purity and the expected qualitative composition. A good homogeneity of the microstructures and a small degree of porosity were observed. The elastic modulus (the Youngs modulus E, shear modulus G, and Poissons ratio ν) of Na0.96Li0.04NbO3 were determined with the use of an ultrasonic method. The electrical properties of Na0.96Li0.04NbO3 ceramics were investigated at the frequency ranging from 0.5 kHz to 200 kHz, and the temperature ranging from room temperature to 750 K. The test sample shows a dielectric dispersion.

Neuro — Didactic perspective of creative attitude towards education in the third millennium — Examination of individual cases

The aim of the study was to demonstrate whether and how information technology affects human development, particularly in the shaping of creative attitudes. Creative attitudes were examined by standardized questionnaire of KANH creative attitudes. The study aimed to demonstrate how Biofeedback training method affects the level of creative attitudes. In the group with predominance of reproductive attitudes, after training there was an increase of creative attitudes, some people slightly decreased level of creative attitudes. The important news is that there has been a decline in reproductive activities. In the group of patients with a predominance of creative activities, in certain individuals, there was an increase in creative behavior. In more than a dozen people was minimal decline of creative attitudes. There was a decline of reproductive behavior in a few subjects, while in a few, this attitude remained unchanged. The paper pointed out that in most subjects, under the influence of biofeedback training method there has been a decline in reproductive behavior. Only in one of the individuals, reconstructive operations have not changed. It is noteworthy that decreased reproductive attitudes even among those who interrupted therapy.

The Use of Filtration Theory for Performance Optimization of Volume

Experimental data reveal that dry filters utilizing filter papers tend to change their operational characteristics whilst in service. When the airflow stream in the filter is constant, the pressure losses, and hence energy losses, will increase. On the other hand, when a constant pressure head is maintained to induce the flow, the flow rate of the flowing medium will decrease. A possible solution is a filter made from several filtering layers, their density varying along the dusted air flow path. Basing on the theory of filtration, the density of filter layers shall be chosen such that the amount of particulate matter settling on individual filter layers should be identical. The paper summaries the results of experimental testing of five-layered filters. Of particular interest is the distribution of collected dust mass along the airflow path in the filter in relation to the layer density.

Examination of the theta index during solving IT issues

The theta waves are formed in the thalamus and in the limbic system. It seems, it is linked with a data retrieval from the memory along with ability to impulse control. These waves dominate in EEG scan from 6 months of life till the age of 6-7. At elderly people the dominance of these waves can be related to drowsiness and excluding from discussion and fully awareness of environment. In the theta state person can think very creatively because its related with the hypnologic state of mind. These waves can be also observed during visualization. The theta state lies on the edge of our consciousness. In Biofeedback, they are associated with the deepest level of meditation. The Theta is also considered as entrance to memory and learning ability. [1-4] Theta meditation increase creativity and allow learning faster. Theta reduce stress level, unlock the understanding, and other none physical senses. It also helps to release the endorphins, strengthening the immune system.