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    Tytuł:
    Formation of Mn-Related Defect Band in InP
    Autorzy:
    Macieja, B.
    Korona, K. P.
    Piersa, M.
    Witowski, A. M.
    Wasik, D.
    Wysmołek, A.
    Strzelecka, G.
    Hruban, A.
    Surma, B.
    Palczewska, M.
    Kamińska, M.
    Twardowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2036033.pdf
    Data publikacji:
    2003-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.55.Eq
    72.20.Ee
    72.20.Jv
    Opis:
    Electron paramagnetic resonance, optical absorption, luminescence and electrical studies of InP highly doped with Mn were performed. Electron paramagnetic resonance revealed presence of manganese in Mn$\text{}^{2+}$(d$\text{}^{5}$) configuration. In optical absorption, systematic reduction of InP band gap was observed with increase in Mn content. This was correlated with increase in photoionization-type absorption band starting at 0.2 eV. Time-resolved photoluminescence measurements showed decrease in photoexcited carrier lifetime and shortening of donor-acceptor pair recombination time with increase in Mn content. Moreover, photoluminescence band was shifted to lower energies, similarly to optical band gap. In electrical transport two mechanisms of conductivity were observed. Valence band transport dominated at higher temperatures, above 160 K, and activation energy of free-hole concentration was determined as about 0.20 eV. At lower temperatures hopping conductivity, clearly related to Mn defect band, was present. All these results were consistent with assumption of creation of Mn-related defect-band at 0.2 eV above InP valence band. It was found that Mn centers responsible for this band were in configurations of either d$\text{}^{5}$ or d$\text{}^{5}$ plus a hole localized about 7Å around corresponding Mn core.
    Źródło:
    Acta Physica Polonica A; 2003, 103, 6; 637-642
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Infrared Spectroscopy of GaAs Doped with Mn
    Autorzy:
    Rutkowska, A.
    Wasik, D.
    Witowski, A.
    Sadowski, M.
    Orłowski, W.
    Strzelecka, G.
    Hruban, A.
    Kamińska, M.
    Twardowski, A.
    Potemski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044531.pdf
    Data publikacji:
    2005-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.70.Ej
    78.20.Ls
    78.30.Fs
    Opis:
    We found that the fine structure related to Lyman spectra of [Mn$\text{}^{2+}$(d$\text{}^{5}$) + a hole] centers in GaAs was present only for samples with low Mn concentration. Such samples, at low temperature, did not show any hopping conductance within Mn impurity band. Magnetooptical measurements revealed that magnetic field induced splitting of the Lyman optical transitions was larger than Zeeman splitting observed for typical shallow acceptors in GaAs, like Be, Zn, and C. This experimental result proved that in the case of Mn acceptor impurity, the exchange coupling of a hole and the S = 5/2 Mn$\text{}^{2+}$(d$\text{}^{5}$) core could not be neglected, which was in accordance with the [Mn$\text{}^{2+}$(d$\text{}^{5}$) + a hole] model of the neutral Mn center in GaAs.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 5; 845-849
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mn Impurity in Bulk GaAs Crystals
    Autorzy:
    Pawłowski, M.
    Piersa, M.
    Wołoś, A.
    Palczewska, M.
    Strzelecka, G.
    Hruban, A.
    Gosk, J.
    Kamińska, M.
    Twardowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044520.pdf
    Data publikacji:
    2005-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.55.Eq
    72.20.Ee
    75.50.Pp
    76.30.Fc
    Opis:
    Magnetic and electron transport properties of GaAs:Mn crystals grown by Czochralski method were studied. Electron spin resonance showed the presence of Mn acceptor A in two charge states: singly ionized A$\text{}^{-}$ in the form of Mn$\text{}^{2+}$(d$\text{}^{5}$), and neutral A$\text{}^{0}$ in the form of Mn$\text{}^{2+}$(d$\text{}^{5}$) plus a bound hole (h). It was possible to determine the relative concentration of both types of centers from intensity of the corresponding electron spin resonance lines. Magnetization measured as a function of magnetic field (up to 6 T) in the temperature range of 2-300 K revealed overall paramagnetic behavior of the samples. Effective spin was found to be about 1.5 value, which was consistent with the presence of two types of Mn configurations. In most of the studied samples the dominance of Mn$\text{}^{2+}$(d$\text{}^{5}$)+h configuration was established and it increased after annealing of native donors. The total value of Mn content was obtained from fitting of magnetization curves with the use of parameters obtained from electron spin resonance. In electron transport, two mechanisms of conductivity were observed: valence band transport dominated above 70 K, and hopping conductivity within Mn impurity band at lower temperatures. From the analysis of the hopping conductivity and using the obtained values of the total Mn content, the effective radius of Mn acceptor in GaAs was estimated as a = 11±3Å.
    Źródło:
    Acta Physica Polonica A; 2005, 108, 5; 825-830
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Observation of Superconductivity in Highly Cr-Doped GaP Single Crystals
    Autorzy:
    Gosk, J. B.
    Strzelecka, G.
    Kowalski, G.
    Hruban, A.
    Kamińska, M.
    Twardowski, A.
    Gronkowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2046913.pdf
    Data publikacji:
    2006-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.10.+v
    75.50.Pp
    61.72.Vv
    61.72.Dd
    81.10.Dn
    Opis:
    Studying bulk GaP, highly doped with Cr, and searching for possible ferromagnetic semiconductor in view of spintronic applications, we found superconducting behavior of this material unexpectedly. Magnetization techniques and X-ray diffraction were applied to study these crystals. Magnetization revealed superconducting features up to about 6 K and X-ray studies showed that superconductivity might be related to small size Cr precipitates.
    Źródło:
    Acta Physica Polonica A; 2006, 110, 2; 189-193
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Chemical Composition of Liquid Phase and Growth Process on Physical Properties of $Bi_2Se_3,$ $Bi_2Te_3$ and $Bi_2Te_2Se$ Compounds
    Autorzy:
    Hruban, A.
    Materna, A.
    Dalecki, W.
    Strzelecka, G.
    Piersa, M.
    Jurkiewicz-Wegner, E.
    Diduszko, R.
    Romaniec, M.
    Orłowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492965.pdf
    Data publikacji:
    2011-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.55.-i
    72.10.-d
    72.15.-v
    72.20.-I
    73.20.-r
    Opis:
    We studied synthesis and crystal growth of $Bi_2Te_3,$ $Bi_2Se_3$ and $Bi_2Te_2Se$ compounds by means of vertical Bridgman method. Crystals were grown from stoichiometric melts and under different molar ratio of Bi:Te, Bi:Se or Bi:Te:Se. The obtained crystals were characterized by X-ray diffraction analysis, energy dispersive X-ray spectroscopy, scanning electron microscopy, atomic force microscopy, and the Hall effect measurements. Some of the samples demonstrated insulating bulk behavior, by means of resistivity versus temperature measurements.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 5; 950-953
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A patients expectations of and satisfaction from primary care medical services
    Autorzy:
    Strzelecka, A.
    Nowak-Starz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1917341.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    satisfaction of patient
    Patient Request Form (PRF)
    patient
    Opis:
    Purpose: To establish the relation between the reasons one registers to a primary care physician and a patient's expectations of and satisfaction from the medical services provided. Material and methods: A total of 422 patients from public and non-public health care centres participated in the research. The research was carried out in 20 institutions of public and non-public centres for primary care in the Swiętokrzyskie Voivodeship. A Patient Request Form was used as the research tool. The Polish version of the Patient Request Form (PRF) is composed of 18 statements concerning different reasons for the present contacting of a general practitioner. Comparative analysis of interval or ratio scale type variables was performed using variance analysis, which in the case of significance of the main effects or interactions was supplemented by post-hoc analysisResults: After a repeated measures analysis of variance was done, a significant variation was found in terms of the type of institution: a public and non-public health care centre (p=0.01955). The effect of the type of expectation also proved significant (p=0.00000). A significant interaction was also found between the type of institution and the kind of PRF (Patient Request Form) (p=0.00985). A significant effect (p=0.00805) was obtained using single-classification analysis of variance upon analysing the assessment of the treatment conditions at a primary care clinic (JUM2) in terms of the type of institution.Conclusions. Patients participating in the study indicated expectations related with an explanation of the illness and obtaining information about test results and further treatment as the reasons for the present registration to a primary care physician. As regards assessment of the treatment conditions (JUM2) at primary care clinics in view of the type of institution and area of services, the patients participating in the study assessed non-public health care centres more highly.
    Źródło:
    Progress in Health Sciences; 2015, 5, 1; 107-113
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using affinity analysis in diagnosing the needs of patients as regards e-Health
    Autorzy:
    Strzelecka, A.
    Stachura, M.
    Wójcik, T.
    Pacian, A.B.
    Kulik, T.
    Pacian, J.
    Kaczoruk, M.
    Galińska, E.M.
    Kawiak-Jawor, E.
    Nowak-Starz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086058.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    patient
    primary health care
    e-health
    affinity analysis
    Opis:
    Introduction. E-Health tools allow a medical facility to set a given patient’s data in order using ICT techniques, and the patient to use those techniques when contacting a given organisation. Materials and method. Secondary statistical data was used in the research. The study was carried out among primary health care patients. Mining for affinity rules was done in the R programme. The apriori and inspect functions from the arules package were used. Moreover, any redundant rules were removed from thoseobtained using the afero-mentioned method. Applying the general description of the affinity analysis method onto the survey described herein, it should be stressed that the aim of using affinity analysis was to discover the rules which contain the sub-transaction B={V_6=1} as a consequent. This was determined by the intention to discover associations regarding the knowledge about a uniform information system that the patients under study might have. Results. In the discovered rules, the antecedent most often contained an indication of the need for introducing a uniform solution as regards telemedicine. Moreover, according to the opinions of ‚conscious‘patients, a uniform IT system should improve the work at primary health care institutions, introducing an on-line booking system for visits should improve the productivity and comfort of doctors, and an IT system should provide unambiguous identification of a patient. Conclusions. There is potential in using affinity analysis within e-Health. The example of affinity analysis described in his study led to the discovery of interesting and important (from the point of view of a medical facility) regularities regarding the knowledge and expectations of patients as regards e-Health.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2020, 27, 3; 435-441
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determinants of primary healthcare patients’ dissatisfaction with the quality of provided medical services
    Autorzy:
    Strzelecka, A.
    Stachura, M.
    Wójcik, T.
    Kordyzon, M.
    Chmielewski, J.P.
    Florek-Łuszczki, M.
    Nowak-Starz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/28762841.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2021, 28, 1; 142-148
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quality of life, health, eating habits and physical development of middle school adolescents in the Świetokrzyskie
    Autorzy:
    Jasińska, M.
    Strzelecka, A.
    Chmielewski, J.
    Wolak, P.
    Stanisławska, I.
    Choina, P.
    Kordyzon, M.
    Nowak-Starz, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/28762515.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2021, 28, 4; 659-666
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of selected factors related to emotions and general health on the health behaviours of paramedics
    Autorzy:
    Gonczaryk, A.
    Chmielewski, J.P.
    Strzelecka, A.
    Fiks, J.
    Nowak-Starz, G.
    Florek-Łuszczki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/28761752.pdf
    Data publikacji:
    2022
    Wydawca:
    Instytut Medycyny Wsi
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2022, 29, 3; 424-432
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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