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Wyszukujesz frazę "Trybula, J." wg kryterium: Autor


Wyświetlanie 1-12 z 12
Tytuł:
Optimal consumption problem in the Vasicek model
Autorzy:
Trybuła, J.
Powiązania:
https://bibliotekanauki.pl/articles/255083.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
stochastic control
interest rate model
optimal consumption
HJB equation
Opis:
We consider the problem of an optimal consumption strategy on the infinite time horizon based on the hyperbolic absolute risk aversion utility when the interest rate is an Ornstein-Uhlenbeck process. Using the method of subsolution and supersolution we obtain the existence of solutions of the dynamic programming equation. We illustrate the paper with a numerical example of the optimal consumption strategy and the value function.
Źródło:
Opuscula Mathematica; 2015, 35, 4; 547-560
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wrażliwość Trichomonas vaginalis na wysychanie
Sensitivity of Trichomonas vaginalis to dessication
Autorzy:
Zajac, Z.
Malyszko, E.
Trybula, J.
Treszczotko, I.
Bernacka, B.
Powiązania:
https://bibliotekanauki.pl/articles/838043.pdf
Data publikacji:
1988
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parazytologia lekarska
pasozyty czlowieka
rzesistek pochwowy
Trichomonas vaginalis
zywotnosc
wysychanie
srodowisko zewnetrzne
Opis:
Twelve strains of T. vaginalis were tested for their sensitivity to dessication at room temperature. Each of them, in the quantity of 0.5 cm³ of 36 hrs old culture (containing 2.5 mln cells) was placed in 5 sterilized tubes containing 2:5 cm³ of: sterilized Roiron medium, urine, 0.9% NaCl, tap water and distilled water. After shaking, the suspension of Trichomonas of each tube in the quantity of 0.15 cm³ was placed on depression slides. The slides were then placed in sterilized, not tightly covered Petri dishes, which were kept at room temperature. The suspension of 3 slides was examined under microscope and inoculated on Roiron medium prior to complete dessication. The same procedure was followed with respect to the fourth slide but only after the suspension had, dried. The suspension remaining in the tube (2.4 cm³) served as control. The experiment showed that in a drop of 0.9% NaCl, urine and Roiron medium, Trichomonas remains active for 120 min. When transferred to Roiron medium within that time, Trichomonas reproduces in a normal way which was not observed after a transfer from the suspension dried up. In a drop of water Trichomonas loses its ability to reproduce within a time shorter than 120 min. The results speak in favour of a possibility of a non-sexual infection with Trichomonas.
Źródło:
Annals of Parasitology; 1988, 34, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wrażliwość Trichomonas vaginalis na wysychanie
Sensitivity of Trichomonas vaginalis to dessication
Autorzy:
Zając, Z.
Małyszko, E.
Trybuła, J.
Treszczotko, I.
Bernacka, B.
Powiązania:
https://bibliotekanauki.pl/articles/2152634.pdf
Data publikacji:
1988
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parazytologia lekarska
pasozyty czlowieka
rzesistek pochwowy
Trichomonas vaginalis
zywotnosc
wysychanie
srodowisko zewnetrzne
Opis:
Twelve strains of T. vaginalis were tested for their sensitivity to dessication at room temperature. Each of them, in the quantity of 0.5 cm³ of 36 hrs old culture (containing 2.5 mln cells) was placed in 5 sterilized tubes containing 2:5 cm³ of: sterilized Roiron medium, urine, 0.9% NaCl, tap water and distilled water. After shaking, the suspension of Trichomonas of each tube in the quantity of 0.15 cm³ was placed on depression slides. The slides were then placed in sterilized, not tightly covered Petri dishes, which were kept at room temperature. The suspension of 3 slides was examined under microscope and inoculated on Roiron medium prior to complete dessication. The same procedure was followed with respect to the fourth slide but only after the suspension had, dried. The suspension remaining in the tube (2.4 cm³) served as control. The experiment showed that in a drop of 0.9% NaCl, urine and Roiron medium, Trichomonas remains active for 120 min. When transferred to Roiron medium within that time, Trichomonas reproduces in a normal way which was not observed after a transfer from the suspension dried up. In a drop of water Trichomonas loses its ability to reproduce within a time shorter than 120 min. The results speak in favour of a possibility of a non-sexual infection with Trichomonas.
Źródło:
Wiadomości Parazytologiczne; 1988, 34, 3; 249-254
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal axial tension and internal pressure stabilizing post-buckling path for cylindrical shells under torsion
Optymalne rozciąganie osiowe i ciśnienie wewnętrzne stabilizujące ścieżkę pokrytyczną dla skręcanych powłok cylindrycznych
Autorzy:
Krużelecki, J.
Trybuła, D.
Powiązania:
https://bibliotekanauki.pl/articles/279987.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
post-buckling path
stabilization
cylindrical shell
torsion
tension
pressure
Opis:
The effect of stabilization of unstable post-buckling behavior of a structure usually is obtained by changing its geometry. In this paper, a possibility of stabilization of the initially unstable post-buckling path for a cylindrical shell under torsion by application of additional independent loadings acting on the structure without changing the shape and size of the shell is investigated. It occurred that axial tension improves the resistance against buckling for the cylindrical shell under torsion and can stabilize the unstable post-buckling path. On the other hand, internal pressure does not stabilize the post-buckling path but it improves the resistance of such a structure against instability.
Efekt stabilizacji niestatecznego zachowania konstrukcji osiągany jest zazwyczaj przez modyfikację jej geometrii. W pracy tej badana jest możliwość stabilizacji pierwotnie niestatecznej ścieżki równowagi dla cylindrycznych powłok skręcanych bez zmiany jej geometrii i wymiarów, mianowicie przez zastosowanie niezależnych, dodatkowych obciążeń przyłożonych do konstrukcji. Okazało się, że rozciąganie osiowe poprawia odporność na wyboczenie powłoki skręcanej i może prowadzić do stabili zacji jej niestatecznej ścieżki równowagi. Natomiast dodatkowe ciśnienie wewnętrzne nie powoduje stabilizacji pokrytycznej ścieżki, ale podnosi odporność konstrukcji na utratę stateczności.
Źródło:
Journal of Theoretical and Applied Mechanics; 2010, 48, 3; 645-658
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pseudorotational Averaging of EPR Spectrum of Cu(II)O$\text{}_{5}$ Complex in YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ in Low Temperatures
Autorzy:
Stankowski, J.
Kempiński, W.
Trybuła, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1891644.pdf
Data publikacji:
1991-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.50.-f
74.70.Vy
76.30.Fe
Opis:
In low temperatures the condensation of oxygen was found to occur at 05 site in an elementary cell of YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ being the fifth ligand forming the CuO$\text{}_{5}$ complex around Cul copper in chain. This change of coordinantion from CuO$\text{}_{4}$ to CuO$\text{}_{5}$ is the origin of a pseudorotation related to a strong vibronic coupling of two distorted configurations: a tetragonal pyramid C$\text{}_{4v}$ and a trigonal bipyramid D$\text{}_{3h}$, which yields a pseudocubic EPR spectrum in low temperatures. The averaged spectroscopic splitting coefficient is related to a superposition of vibronically coupled orbital states |x$\text{}^{2}$ - y$\text{}^{2}$〉 and |3z$\text{}^{2}$ - r$\text{}^{2}$〉. The averaged spectrum was for the first time observed in low temperatures since the oxygen condensation in YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ at 05 site of the chain occur only when oxygen undergoing fast diffusion among the chains, gets localized with decreasing temperature. The activation energy of oxygen desorption from the 05 site is 36 K.
Źródło:
Acta Physica Polonica A; 1991, 80, 4; 571-581
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dielectric Properties of K$\text{}_{1-x}$(NH$\text{}_{4}$)$\text{}_{x}$H$\text{}_{2}$PO$\text{}_{4}$ (x= 0.095) Crystal
Autorzy:
Kaszyński, J.
Trybuła, Z.
Małuszyńska, H.
Powiązania:
https://bibliotekanauki.pl/articles/2043401.pdf
Data publikacji:
2005-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.84.Fa
77.22.-d
77.22.Ch
77.22.Gm
77.80.-e
64.70.Pf
Opis:
Temperature dependences of the dielectric permittivity were studied for the ferroelectric K$\text{}_{1-x}$(NH$\text{}_{4}$)$\text{}_{x}$H$\text{}_{2}$PO$\text{}_{4}$ mixed crystal. The experiments revealed presence of the beginning of the dipolar glass - embryos in the concentration of ammonium x=0.095. Observations of the dielectric relaxations show much bigger effect domain mechanism than the one related to the growth of clusters of the dipolar glass.
Źródło:
Acta Physica Polonica A; 2005, 108, 1; 103-106
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dielectric Properties of Triglycine Sulphate Crystals Admixtured With D- and DL-Phenylalanine
Autorzy:
Stankowska, J.
Peter, E.
Trybula, M.
Powiązania:
https://bibliotekanauki.pl/articles/2014028.pdf
Data publikacji:
2000-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
77.22.-d
Opis:
The paper reports studies on the effect of D-phenylalanine and DL-phenylalanine admixtures on dielectric properties and domain structure of triglycine sulphate crystals. Permittivity ε and loss tangent tgδ were measured in a wide range of temperatures (10-340 K) as a function of measuring field varied from 1 to 10000 kHz, for samples cut out from two growth pyramids (001) and (110) from triglycine sulphate crystals containing different concentrations of admixtures. A comparison of the effects of D-phenylalanine and DL-phenylalanine admixtures on dielectric properties of triglycine sulphate crystals was made. With increasing concentrations of admixtures in the crystals, the values of ε$\text{}_{max}$ decreased while E$\text{}_{c}$ and E$\text{}_{b}$ (bias field) increased, and P$\text{}_{s}$ and T$\text{}_{c}$ showed insignificant changes. Observations of the domain structure of the admixtured crystals by the liquid crystal method proved its refinement and irregularity. Changes in the domain structure of the crystals occurring in the process of spontaneous ageing were analysed.
Źródło:
Acta Physica Polonica A; 2000, 97, 6; 1061-1072
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free Radicals in K and Rb Admixtured Fullerene C$\text{}_{60}$
Autorzy:
Stankowski, J.
Kempiński, W.
Byszewski, P.
Trybuła, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1929831.pdf
Data publikacji:
1993-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
76.30.Rn
74.70.Wz
Opis:
Molecules of C$\text{}_{60}$ form Van der Waals type crystals. The observations reported here concern EPR investigations of such C$\text{}_{60}$ samples with only a slight amount of Rb or K. Detected defects are (C$\text{}_{60}$)$\text{}^{+}$ or (C$\text{}_{60}$)$\text{}^{y-}$ ion-radicals. A hole (h) or trapped electron (t) are localized on one fullerene ball. In the case of potassium fullerites C$\text{}_{60}$:K the line shape of EPR signal was of the Dysonian form which is characteristic of conducting electrons in metal. The EPR lines of holes (C$\text{}_{60}$)$\text{}^{+}$ are characterized by g$\text{}_{h}$ ≥ g$\text{}_{0}$ whereas for electrons g$\text{}_{t}$ is below the value g$\text{}_{0}$ = 2.0023 characteristic of a free electron (g$\text{}_{t}$ ≤ g$\text{}_{0}$). The EPR linewidth 2ΔB$\text{}_{1s}^{h}$ of the (C$\text{}_{60}$)$\text{}^{+}$ weakly increased with decreasing temperature whereas the EPR linewidth attributed to the electron 2ΔB$\text{}^{t}$$\text{}_{1s}$ significantly decreases with decreasing temperature. The C$\text{}_{60}$:K sample reached superconducting phase below T$\text{}_{c}$ = 11 K which is significantly less than T$\text{}_{c}$ = 16.5 K observed for K$\text{}_{x}$C$\text{}_{60}$ where 2 ≤ x ≤ 4.
Źródło:
Acta Physica Polonica A; 1993, 84, 6; 1117-1123
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superconductivity of $MgB_2$ Layers Prepared on Silicon Substrate by Implantation of Magnesium Ions into Boron Substrate
Autorzy:
Trybuła, Z.
Kempiński, W.
Łoś, Sz.
Kaszyńska, K.
Trybuła, M.
Piekoszewski, J.
Werner, Z.
Barlak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1536977.pdf
Data publikacji:
2010-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.70.-b
74.78.-w
Opis:
The results of investigation of the $MgB_2$ layers prepared on silicon substrate by implantation of Mg ions into boron substrate are presented. After implantation the annealing processes were carried out at temperatures 673 K, 773 K, and 873 K in a furnace in an atmosphere of flowing Ar-4%$H_2$ gas mixture. The samples were characterized by: four-probe electric conductivity measurements and magnetically modulated microwave absorption. Our results showed that due to silicon substrate the diffusion of implanted Mg ions into boron materials should be limited, and the superconducting phase forms a continuous $MgB_2$ layer and the resistivity for all samples fall down to zero below $T_{c}$. The transition temperature $T_{c}$ becomes higher with increasing annealing temperature: $T_{c}$=18 K (for annealing at $T_{A}$=673 K), $T_{c}$=20 K (for annealing at $T_{A}$=773 K), and $T_{c}$=27 K (for annealing at $T_{A}$=873 K).
Źródło:
Acta Physica Polonica A; 2010, 118, 2; 323-325
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superconducting Regions and Kondo Effect of MgB$\text{}_{2}$ Formed by Implantation of Magnesium Ions into Boron Substrate
Autorzy:
Trybuła, Z.
Kempiński, W.
Andrzejewski, B.
Piekara-Sady, L.
Kaszyński, J.
Trybuła, M.
Piekoszewski, J.
Stanisławski, J.
Barlak, M.
Richter, E.
Powiązania:
https://bibliotekanauki.pl/articles/2046803.pdf
Data publikacji:
2006-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.70.-b
74.78.-w
Opis:
The results of investigation of the polycrystalline boron implanted by magnesium and argon plasma pulse treatment are presented. The four-probe electric conductivity measurements and magnetically modulated microwave absorption showed the presence of superconducting islands below the temperature of 25 K. Below T=23 K we detected the Kondo effect, a logarithmic increase in the resistivity as the temperature is lowered, due to iron impurity.
Źródło:
Acta Physica Polonica A; 2006, 109, 4-5; 657-660
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Formation of Superconducting Regions of MgB_2 by Implantation of Boron Ions into Magnesium Substrate
Autorzy:
Trybuła, Z.
Kempiński, W.
Andrzejewski, B.
Piekara-Sady, L.
Kaszyński, J.
Piekoszewski, J.
Werner, Z.
Richter, E.
Prokert, F.
Stanisławski, J.
Barlak, M.
Powiązania:
https://bibliotekanauki.pl/articles/2043433.pdf
Data publikacji:
2005-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.70.-b
74.78.-w
Opis:
The results of investigation of the MgB$\text{}_{2}$ inter-metallic compound with the use of boron ions implantation and plasma pulse treatment are presented. The samples were characterized by: four-probe electric conductivity measurements, magnetically modulated microwave absorption, and magnetic measurements. For hydrogen and argon pulsed plasma treatment the samples with T$\text{}_{c}$ ranging from 10 K to 32 K were obtained. The superconducting phase does not form a continuous layer since the resistivity does not fall down to zero. Apparently, separate islands of superconducting phase are connected through metallic Mg paths. All samples are still below the percolation threshold.
Źródło:
Acta Physica Polonica A; 2005, 108, 1; 165-170
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time Correlated Single Photon Counting System for Optical Measurements
Autorzy:
Trybuła, A.
Domański, G.
Konarzewski, B.
Marzec, J.
Zaremba, K.
Kurjata, R.
Dziewiecki, M.
Smolnik, A.
Ziembicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/226833.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
time correlated single photon counting
photomultiplier tube
optical techniques
Opis:
The high sensitivity time correlated single photon counting system (with photomultiplier tube) for biomedical measurements was designed and tested. Photon time of flight through a parafine wax phantom was modeled by Monte Carlo simulation and next measured by the device. Mean time delay introduced by a phantom is in a good agreement with simulation results. The results presented in this paper demonstrate the feasibility of measuring the optical response with the device.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 3; 301-306
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-12 z 12

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