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Wyświetlanie 1-15 z 79
Tytuł:
Preparation of mares colostrum and milk sample for 2-DE separation without acetone precipitation
Przygotowanie próbek siary i mleka klaczy do rozdziału 2-DE, z pominięciem precypitacji acetonem
Autorzy:
Cichy, A.
Dratwa-Chałupnik, A.
Medeńska, W.
Ożgo, M.
Pikuła, R.
Powiązania:
https://bibliotekanauki.pl/articles/2621587.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
electrophoretic separation
colostrum
mare milk
proteomic analysis
precipitation
acetone
2-D electrophoresis
Źródło:
Acta Scientiarum Polonorum. Zootechnica; 2020, 19, 3; 71-77
1644-0714
Pojawia się w:
Acta Scientiarum Polonorum. Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aulus Gellius, "Noctes atticae 2.24. De vetere parsimonia; deque antiquis legibus sumptuariis" / Aulus Gelliusz, "Noce attyckie, 2.24. O dawnej oszczędności i o starożytnych ustawach dotyczących wydatków"
Autorzy:
Tadajczyk, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/682242.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Źródło:
Studia Ceranea; 2013, 3; 237-237
2084-140X
2449-8378
Pojawia się w:
Studia Ceranea
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
De la Vallée Poussin Summability, the Combinatorial Sum $\sum_{k=n}^{2n-1}$ (2k/k) and the de la Vallée Poussin Means Expansion
Autorzy:
Ali, Z. S.
Powiązania:
https://bibliotekanauki.pl/articles/357696.pdf
Data publikacji:
2017
Wydawca:
Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:
complete metric space
hyperbolic space
infinite product
nonexpansive mapping
random weak ergodic property
przestrzeń metryczna całkowita
przestrzeń hiperboliczna
produkt nieskończony
mapowanie
własności ergodyczne
Opis:
In this paper we apply the de la Vallee Poussin sum to a combinatorial Chebyshev sum by Ziad S. Ali in [1]. One outcome of this consideration is the main lemma proving the following combinatorial identity: with $Re(z)$ standing for the real part of z we have \[ \sum_{k=n}^{2n-1}\left({2k \atop k}\right) = Re\left(\left({2k \atop k}\right) \text{}_{2}F_{1}(1, 1/2 + n; 1 + n; 4\right) - \left({4n \atop 2n}\right) \text{}_{2}F_{1}(1, 1/2 + 2n; 1 + 2n; 4) \] Our main lemma will indicate in its proof that the hypergeometric factors \[ _{2}F_{1}(1, 1/2 + n; 1 + n; 4); \text{ and } _{2}F_{1}(1, 1/2 + 2n; 1 + 2n; 4) \] are complex, each having a real and imaginary part. As we apply the de la Vallee Poussin sum to the combinatorial Chebyshev sum generated in the Key lemma by Ziad S. Ali in [1], we see in the proof of the main lemma the extreme importance of the use of the main properties of the gamma function. This represents a second important consideration. A third new outcome are two interesting identities of the hypergeometric type with their new Meijer G function analogues. A fourth outcome is that by the use of the Cauchy integral formula for the derivatives we are able to give a dierent meaning to the sum: \[ \sum_{k=n}^{2n-1}\left({2k \atop k}\right) \] A fifth outcome is that by the use of the Gauss-Kummer formula we are able to make better sense of the expressions \[ \left({2n \atop n}\right)\text{}_{2}F_{1}(1, 1/2 + n; 1 + n; 4), \text{ and } \left({4n \atop 2n}\right)\text{}_{2}F_{1}(1, 1/2 + 2n; 1 + 2n; 4) \] by making use of the series denition of the hypergeometric function. As we continue we notice a new close relation of the Key lemma, and the de la Vallee Poussin means. With this close relation we were able to talk about P the de la Vallee Poussin summability of the two innite series $\sum_{n=0}^{\infty}\cos n\theta$ and $\sum_{n=0}^{\infty}(-1)^{n}\cos n\theta$. Furthermore the application of the de la Vallee Poussin sum to the Key lemma has created two new expansions representing the following functions: \[ \frac{2^{(n-1)}(1+x)^{n}(-1+2^{n}(1+x)^{n})}{n(2x+1)}, \text{ where } x=\cos \theta \] and \[ \frac {-2^{(n-1)}(-1 + 2^{n}(1-x)^{n})(1-x)^{n}} {n(2x - 1)}, \text{ where } x=\cos \theta \] in terms of the de la Vall´ee Poussin means of the two infinite series \[ \sum_{n=0}^{\infty}\cos\theta, \] and \[ \sum_{n=0}^{\infty}(-1)^{n}\cos\theta, \]
Źródło:
Journal of Mathematics and Applications; 2017, 40; 5-20
1733-6775
2300-9926
Pojawia się w:
Journal of Mathematics and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anisotropy of Magnetoresistance and Shubnikov-de Haas Oscillations in Organic Metal (ET)$\text{}_{3}$CuCl$\text{}_{4}$ • H$\text{}_{2}$O
Autorzy:
Pesotskii, S.
Kovalev, A. E.
Lyubovskii, R. B.
Kushch, N. D.
Powiązania:
https://bibliotekanauki.pl/articles/1933340.pdf
Data publikacji:
1995-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.90.+w
Opis:
Behavior of the magnetoresistance has been studied in organic quasi two-dimensional metal (ET)$\text{}_{3}$CuCl$\text{}_{4}$•H$\text{}_{2}$O. Shubnikov-de Haas oscillations have been observed at the magnetic field directions near H ∥ c*. The oscillations frequency at H ∥ c* equals 45 T that corresponds approximately to 1% of the first Brillouin zone cross-section. The angle dependence of the oscillations frequency allows one to imagine at least the part of Fermi surface in the form of cylinder with an axis along c*.
Źródło:
Acta Physica Polonica A; 1995, 87, 4-5; 773-776
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deformed solitons of a typical set of (2+1)-dimensional complex modified Korteweg–de Vries equations
Autorzy:
Yuan, Feng
Zhu, Xiaoming
Wang, Yulei
Powiązania:
https://bibliotekanauki.pl/articles/329954.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
Korteweg–de Vries equation
Darboux transformation
deformed soliton solution
równanie Kortewega-de Vries
transformacja Darboux
soliton zdeformowany
Opis:
Deformed soliton solutions are studied in a typical set of (2+1)-dimensional complex modified Korteweg–de Vries (cmKdV) equations. Through constructing the determinant form of the n-fold Darboux transformation for these (2+1)-dimensional cmKdV equations, we obtain general order-n deformed soliton solutions using zero seeds. With no loss of generality, we focus on order-1 and order-2 deformed solitons. Three types of order-1 deformed solitons, namely, the polynomial type, the trigonometric type, and the hyperbolic type, are derived. Meanwhile, their dynamical behaviors, including amplitude, velocity, direction, periodicity, and symmetry, are also investigated in detail. In particular, the formulas of |q[1]| and trajectories are provided analytically, which are involved by an arbitrary smooth function f(y + 4λ2t). For order-2 cases, we obtain the general analytical expressions of deformed solitons. Two typical solitons, possessing different properties in temporal symmetry, are discussed.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2020, 30, 2; 337-350
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vocabulary development in a CLIL context: A comparison between French and English L2
Autorzy:
Baten, Kristof
Van Hiel, Silke
De Cuypere, Ludovic
Powiązania:
https://bibliotekanauki.pl/articles/780771.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
CLIL
vocabulary
L2 English
L2 French
productive and receptive levels tests
Opis:
Content and language integrated learning (CLIL) has expanded in Europe, favored by the large body of research, often showing positive effects of CLIL on L2 development. However, critical voices have recently questioned whether these positive findings apply to any language, given that most research focuses on English. Taking into account this concern, the present study investigated the (productive and receptive) vocabulary development in L2 English and L2 French of the same group of learners within a CLIL context. The aim was not to evaluate the benefits of CLIL over non-CLIL, but, instead, to examine whether vocabulary gains in CLIL learning are language-dependent. More specifically, this study included 75 Flemish eight-grade pupils who had CLIL lessons in both English and French. The results show that although the pupils have a larger English vocabulary, the level of improvement (from pretest to posttest) is not different across the languages. The findings indicate that within CLIL vocabulary knowledge also develops in languages other than English.
Źródło:
Studies in Second Language Learning and Teaching; 2020, 10, 2; 307-336
2083-5205
2084-1965
Pojawia się w:
Studies in Second Language Learning and Teaching
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photocatalytic Activity of $TiO_2$ Powders Synthesized by Supercritical Gas Antisolvent Method
Autorzy:
Tuncer, M.
Ozdemir, B.
Powiązania:
https://bibliotekanauki.pl/articles/1293650.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.33.De
Opis:
Synthesis of nanocrystalline, spherical, and anatase type $TiO_2$ photocatalyst were performed by supercritical gas antisolvent process in the range of 50-150C and 100-150 bar. As-prepared samples were calcined at 500C and characterized by X-ray diffraction, scanning electron microscopy, Brunauer-Emmett-Teller method, differential thermal analysis/thermal gravimetry. In X-ray diffraction analysis, the anatase crystalline phase of titanium dioxide has been detected. The mean crystalline size of powders is about 13 nm. The photoactivity test of the powders was evaluated by the photodegradation of aqueous RR 180 (reactive red 180) solution under UV light. While the photocatalytic performance of $TiO_2$ powders (Brunauer-Emmett-Teller surface area of 69.2 $m^2$/g) produced at 150 bar and 150C was found to be 98%, only 25% degradation was observed with powder produced at 150 bar and 100°C. Results showed that the powder properties and photocatalytic activity can be tuned by controlling the supercritical conditions such as temperature and pressure.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 608-610
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling Thermal Expansion of $Ni_{2}MnGe$
Autorzy:
Pugaczowa-Michalska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1810454.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Lp
71.20.Be
65.40.De
Opis:
The present study of $Ni_{2}MnGe$ is focused on describing the thermal properties of the alloy in the framework of first-principles electronic structure calculations coupled with a Debye treatment of the vibrating lattice. The electronic structure of $Ni_{2}MnGe$ has been studied using the full-potential nonorthogonal local-orbital minimum basis method. Two approximations for Grüneisen parameter γ, i.e. Slater's and Dugdale and MacDonald's expressions were assumed.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 194-196
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jean-Pierre Coriat, Les constitutions des Sévères: Règne de Septime Sévère. I, Constitutions datées de la première période du règne (juin 193 – automne 197 ap. J-C) et constitutions non datées de Septime Sévère cité comme seul auteur de la décision [= Sources et Documents publiés par l’École française de Rome 1], Rome 2014, xxvi + 422 pp., ISBN 978-2-7283-0969-6. (Review)
Autorzy:
Wojtczak, Marzena
Powiązania:
https://bibliotekanauki.pl/articles/1195083.pdf
Data publikacji:
2014
Wydawca:
Fundacja im. Rafała Taubenschlaga
Źródło:
The Journal of Juristic Papyrology; 2014, 44; 191-196
0075-4277
Pojawia się w:
The Journal of Juristic Papyrology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Pressure Induced B1-B2 Phase Transition of CdO
Autorzy:
Bhardwaj, P.
Powiązania:
https://bibliotekanauki.pl/articles/1399274.pdf
Data publikacji:
2013-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.de
62.20.dq
62.50.-p
Opis:
In this paper, the structural, elastic and thermodynamic properties of CdO under different pressure range have been reported. An extended interaction potential model (including the zero point energy effect) has been used for this study. Phase transition pressures are associated with a sudden collapse in volume. At compressed volume, the present oxide is found in cesium chloride (CsCl) phase. The calculated second order elastic constants and their various combinations have been reported in different pressure range. The calculated values have been compared with available results. Our values have been found in good agreement with existing findings.
Źródło:
Acta Physica Polonica A; 2013, 124, 4; 677-684
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Support of active ageing through P2P learning
Autorzy:
Baschiera, Barbara
De Meyer, Willem
Powiązania:
https://bibliotekanauki.pl/articles/954222.pdf
Data publikacji:
2016
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
Older Adults
Peer to peer learning
Key competences
Opis:
Personal development throughout the course of life is at the core of several important policy documents that have shaped European cooperation in economic, social and educational sciences over the last decade. The paradigm of Lifelong Learning implies learning at any age of life and underlines the importance of achieving continuous knowledge and self-care. Pedagogy has started taking into account the age of older adults only in recent years. The European project we are going to illustrate sought to test how well peer to peer learning can be useful to define new training and learning models for older adults. The HiHtaST (Hand in Hand to a Social Tomorrow) project provides an example of peer to peer learning among older adults. We provided training for adult learners to teach IT among other older adults as a means for social inclusion in five European countries. Each country had 20 learners / trainers who had other older students in turn. Multiple choice questionnaires and focus groups were used to collect data. The project was run in the theoretical framework of active ageing, considering the paradigm of Vygotsky’s zone of proximal development and co-construction of knowledge.The project results showed that adults can acquire knowledge in peer to peer group situations with no drop-outs especially when learning real and practical tasks, which suggests that peer to peer learning works better than a frontal class in formal as well as non-formal or informal situations.
Źródło:
Journal of Education Culture and Society; 2016, 7, 1; 180-192
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of Fermi Surfaces and Effective Masses of the Organic Superconductors (BEDO-TTF)$\text{}_{2}$ReO$\text{}_{4}$(H$\text{}_{2}$O) and κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ by Shubnikov-de Haas and de Haas-van Alphen Measurements
Autorzy:
Schweitzer, D.
Balthes, E.
Karlich, S.
Heinen, I.
Keller, H.
Strunz, W.
Biberacher, W.
Jansen, A.G.M.
Steep, E.
Powiązania:
https://bibliotekanauki.pl/articles/1933332.pdf
Data publikacji:
1995-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.25.Jd
71.25.Hc
74.70.Kn
Opis:
The Fermi surfaces and effective masses of (BEDO-TTF)$\text{}_{2}$ReO$\text{}_{4}$(H$\text{}_{2}$0) and κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ were investigated by Shubnikov–de Haas (SdH) and de Haas–van Alphen (dHvA) measurements in magnetic fields up to 27 T in the temperature range from 0.5 K to 4.2 K. Two small closed pockets (0.7% and 1.5% of the first Brillouin zone) are observed in (BEDO-TTF)$\text{}_{2}$ReO$\text{}_{4}$(H$\text{}_{2}$0) corresponding very well with two cross-sectional areas of the Fermi surfaces obtained for a hole and an electron pocket from tight binding calculations. In contrast, in κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ two relatively large closed sections (13% and 85% of the first Brillouin zone) of the Fermi surfaces are observed, again confirming the tight binding calculations. For κ-(BEDT-TTF)$\text{}_{2}$I$\text{}_{3}$ in magnetic fields above 12 T the effective mass for the larger orbit, as obtained from the temperature dependence of the SdH-oscillation amplitudes, is magnetic field dependent as long as the field is arranged perpendicular to the conducting planes (Θ = 0°). In contrast, from dHvA measurements - which were performed by turning the magnetic field by 27° with respect to the SdH experiments - the observed effective mass is field independent. We suppose that the occurrence of anyons at temperatures below 1 K and in fields above 12 T might be the reason for the observed field dependence of the effective mass in the SdH investigations under the special angle 0°.
Źródło:
Acta Physica Polonica A; 1995, 87, 4-5; 749-759
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First-principle study of structural, elastic anisotropic, and thermodynamic properties of P4̅m2-BC₇
Autorzy:
Zhang, Quan
Wei, Qun
Yan, Haiyan
Zhang, Zixia
Fan, Qingyang
Jia, Xiaofei
Zhang, Junqin
Zhang, Dongyun
Powiązania:
https://bibliotekanauki.pl/articles/1070533.pdf
Data publikacji:
2016-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.15.Mb
65.40.De
62.20.de
Opis:
The structural, elastic anisotropy and thermodynamic properties of the P4̅m2-BC₇ are investigated using first-principles density functional calculations and the quasi-harmonic Debye model. The obtained structural parameters and elastic modulus are in consistency with the available theoretical data. Elastic constants calculations show that P4̅m2-BC₇ is elastic anisotropic. The bulk modulus as well as other thermodynamic quantities of P4̅m2-BC₇ (including the Grüneisen constant, heat capacity and thermal expansion) on temperatures and pressures have also been obtained.
Źródło:
Acta Physica Polonica A; 2016, 129, 3; 329-333
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An incentives model based on reputation for P2P systems
Autorzy:
Asís López-Fuentes de, F.
Powiązania:
https://bibliotekanauki.pl/articles/308354.pdf
Data publikacji:
2013
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
content distribution
incentive model
reputation
peer-to-peer networks
Opis:
In this paper an incentive model to improve the collaboration in peer-to-peer networks is introduced. The proposed solution uses an incentives model associated with reputation issues as a way to improve the performance of a P2P system. The reputation of the all peers in the system is based on their donated resources and on their behavior. Supplying peers use these rules as a way to assign its outgoing bandwidth to the requesting peers during a content distribution. Each peer can build its best paths by using a best-neighbor policy within its neighborhood. A peer can use its best paths to obtain best services related to content search or download. The obtained results show that proposed scheme insulates the misbehaving peers and reduces the free-riding so that the systems performance is maximized.
Źródło:
Journal of Telecommunications and Information Technology; 2013, 4; 92-101
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 79

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