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Wyszukujesz frazę "Buczko, P." wg kryterium: Wszystkie pola


Wyświetlanie 1-5 z 5
Tytuł:
Evaluation of occlusion and orthodontic needs of thirteen-year-old children from Podlaskie voivodeship
Autorzy:
Dargiewicz, E.
Szarmach, I.
Kaczyńska, J.
Buczko, P.
Powiązania:
https://bibliotekanauki.pl/articles/1917506.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Malocclusion
epidemiological study
children
Opis:
Purpose: One of the main research aims of epidemiological studies is to prove the prevalence of diseases and physiological conditions among people. The results of these studies enable to implement efficient prophylaxis and to plan proper health care management. Information about the prevalence of malocclusions in children and adolescents is a very important aspect of the planning of preventive care in health policy. In addition, evaluation of malocclusion allows for determining current treatment effectiveness and orthodontic treatment need after the completion of free orthodontic treatment under the Polish National Health Fund, which the legislator provided for children up to 13 years of age.Materials and methods: The study included 500 children, aged 13 years (249 girls, 251 boys) from the Podlaskie voivodeship. The study was conducted in nine junior high schools, in a school nursing surgery using basic diagnostic tools (periodontal probe, dental mirror, laryngological spatula). The rules of Polish orthodontic diagnosis by Orlik-Grzybowska were applied in diagnosis of malocclusion. Dental abnormalities were also determined.Results: Malocclusions were found in 57.8% of patients. 34% of children had distal occlusion belonged to the most frequent irregularities, while lingual occlusions (1.6%) was observed the most rarely. Dental abnormalities, including teeth rotations (81.8%) as most frequent were reported in 82.8% of the respondents.Conclusions: The prevalence of malocclusion in 13 - year old school children from the Podlaskie voivodeship is high and indicates the inadequacy of orthodontic health care program. Distal occlusion is the most common malocclusion No significant differences were found between the prevalence of malocclusion and the place of residence.
Źródło:
Progress in Health Sciences; 2015, 5, 2; 84-92
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of Small Diameter Semiconductor Nanowires
Autorzy:
Bukała, M.
Galicka, M.
Buczko, R.
Kacman, P.
Powiązania:
https://bibliotekanauki.pl/articles/2047717.pdf
Data publikacji:
2007-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.21.Hb
73.43.Cd
73.61.Ey
Opis:
The properties of very thin (up to 16Å diameter) wires, cut out from the bulk in either zinc-blende or wurtzite material, are studied theoretically. In the total energy calculations we use ab initio methods and consider three different crystallographic growth axes for the zinc-blende and one for the wurtzite structure. We show that the most stable zinc-blende nanowires are those growing along (111) direction, however, the wurtzite structure is found to be energetically more favorable than the zinc-blende for wires of the same diameter. In addition, the band structure of the wires was calculated.
Źródło:
Acta Physica Polonica A; 2007, 112, 2; 425-430
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantum Spin Hall Effect in Strained (111)-Oriented SnSe Layers
Autorzy:
Safaei, S.
Galicka, M.
Kacman, P.
Buczko, R.
Powiązania:
https://bibliotekanauki.pl/articles/1398549.pdf
Data publikacji:
2016-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.55.jd
71.20.-b
73.20.-r
Opis:
Recently, the quantum spin Hall effect has been predicted in (111)-oriented thin films of SnSe and SnTe topological crystalline insulators. It was shown that in these films the energy gaps in the two-dimensional band spectrum depend in an oscillat ory fashion on the layer thickness - the calculated topological invariant indexes and edge state spin polarizations show that for films 20-40 monolayers thick a two-dimensional topological insulator phase appears. Edge states with the Dirac cones with opposite spin polarization in their two branches are obtained for both materials. However, for all but the (111)-oriented SnTe films with an even number of monolayers an overlapping of bands in Γ̅ and M̅ diminishes the final band gap and the edge states appear either against the background of the bands or within a very small energy gap. Here we show that this problem in SnSe films can be removed by applying an appropriate strain. This should enable observation of the quantum spin Hall effect also in SnSe layers.
Źródło:
Acta Physica Polonica A; 2016, 129, 1a; A-150-A-152
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phonon Effects on the Weak Measurement of Charge States in Quantum Dots with a Quantum Point Contact
Autorzy:
Marcinowski, Ł.
Krzyżosiak, M.
Machnikowski, P.
Buczko, R.
Mostowski, J.
Roszak, K.
Powiązania:
https://bibliotekanauki.pl/articles/2048072.pdf
Data publikacji:
2011-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
73.63.Kv
03.65.Ta
63.20.kd
Opis:
We study theoretically the process of a weak measurement of charge states in a double quantum dot performed by coupling to a quantum point contact. We focus on the interplay of the measurement process with phonon-induced dephasing of delocalized superpositions of electron states and compare the time scales relevant for the dynamics of the open system and for the measurement process: the decoherence rate, the localization rate of the state conditioned on the measurement outcome and the time scale on which information on the system state is gained in the process of the measurement.
Źródło:
Acta Physica Polonica A; 2011, 119, 5; 640-643
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and Theoretical Analysis οf PbTe-CdTe Solid Solution Grown by Physical Vapour Transport Method
Autorzy:
Szot, M.
Szczerbakow, A.
Dybko, K.
Kowalczyk, L.
Smajek, E.
Domukhovski, V.
Łusakowska, E.
Dziawa, P.
Mycielski, A.
Story, T.
Bukała, M.
Galicka, M.
Sankowski, P.
Buczko, R.
Kacman, P.
Powiązania:
https://bibliotekanauki.pl/articles/1791366.pdf
Data publikacji:
2009-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.10.Bk
61.50.Ah
71.20.Nr
78.60.Lc
72.20.Fr
Opis:
Bulk monocrystals of $Pb_{1-x}Cd_{x}Te$, with the Cd content x up to 0.11, were grown by physical vapour transport method. The structural, electrical and optical properties of these ternary crystals were studied experimentally and theoretically. All investigated samples exhibit rock-salt structure and high crystal quality, which was confirmed by X-ray rocking curve width parameter of about 100 arcsec. The decrease of the lattice parameter with increasing Cd content x was found experimentally, in agreement with ab initio calculations. The band structures of $Pb_{1-x}Cd_{x}Te$ mixed crystals for x values up to 0.2 were calculated using tight binding approach. The calculated band gap in the L-point increases with the Cd content in qualitative agreement with photoluminescence measurements in the infrared. For all studied $Pb_{1-x}Cd_{x}Te$ samples, the Hall effect and electrical conductivity measurements, performed in the temperature range from 4 to 300 K, revealed p-type conductivity.
Źródło:
Acta Physica Polonica A; 2009, 116, 5; 959-961
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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