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In the paper, the results of investigations of temperature and frequency dependences of dielectric permeability and dielectric loss of compositions LDPE + xvol%Bi2Te3 are stated. The investigations were carried out at frequency 10 – 105 Hz and temperature 20°C - 150°C intervals, respectively. It was revealed that increase of percentage of the filler Bi2Te3 in the matrix, reduces to increase of dielectric permeability and dielectric loss of composites LDPE + xvol%Bi2Te3 in connection with the change reducing to Maxwell-Wagner’s volume polarization and emergence of comparative strong inner field in semiconductor clusters.
The g.s. of heavy and superheavy hydrogen isotopes, namely 4-7 H, are successfully examined by applying the Isomorphic Shell Model. Properties examined are binding energies and effective radii. The novelty of the present work is that, due to the small number of nucleons involved and the subsequently large deformation, an internal collective rotation appears which is inseparable from the usual internal motion even in the ground states of these nuclei, i.e., for such nuclei the adiabatic approximation is not valid. This extra degree of freedom leads to a reduction of binding energies, an increase of effective radii, and an increase of level widths.
A thorough study of regular and quasi-regular polyhedra shows that the
symmetries of these polyhedra identically describe the quantization of orbital
angular momentum, of spin, and of total angular momentum, a fact which
permits one to assign quantum states at the vertices of these polyhedra assumed
as the average particle positions.
Furthermore, if the particles are fermions, their wave function is
anti-symmetric and its maxima are identically the same as those of repulsive
particles, e.g., on a sphere like the spherical shape of closed shells, which implies equilibrium of these
particles having average positions at the aforementioned maxima. Such
equilibria on a sphere are solely satisfied at the vertices of regular and
quasi-regular polyhedra which can be associated with the most probable forms of
shells both in Nuclear Physics and in Atomic Cluster Physics when the
constituent atoms possess half integer spins. If the average sizes of the
constituent particles are known, then the average sizes of the resulting shells
become known as well. This association of Symmetry with Quantum Mechanics leads
to many applications and excellent results.
The purpose of this
study is to identify pedagogical formation students’ (teacher candidates’)
communication skills based on their perceptions. The study sought answers to
the following research question: What are the perceptions of pedagogical
formation students (teacher candidates) related to their communication skills?
Assessment of pedagogical formation students’ (teacher candidates’) perceptions
regarding their communication skills was undertaken through qualitative
research methods. Qualitative data collected with the help of semi-structured
interview form were analyzed in terms of content. The study was conducted with
the participation of 48 teacher candidates attending pedagogical formation
classes at Düzce University during 2013-2014 academic year. According to the
data obtained at the end of the study, teacher candidates are aware of the
necessity and importance of communication. They are aware that the prerequisite
for being contented, successful and social individuals and professionals is
healthy and good communication with others. Teacher candidates know the
importance and necessity of body language in effective communication and
generally prefer to use it. They are also aware of the need for written and
oral communication when required. Psychological situations such as anxiety,
stress, lack of self-efficacy, timidity, fear and excitement are regarded as
barriers that inhibit communication. These barriers are followed by being
misunderstood, lack of feedback and language, culture, prior information and
prejudices related to inappropriate context/environment and persons involved in
communication. Teacher candidates express that they can develop communication
skills by participating in social activities. They also state that they can
develop communication skills by reading books/articles/research findings,
participating in courses/seminars/conferences, meeting new and different people
and taking training-expert support.