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Tytuł:
Renal assessment in teenage patients with cystic fibrosis – preliminary report
Ocena funkcji nerek u nastolatków z mukowiscydozą – doniesienie wstępne
Autorzy:
Sands, Dorota
Jaworska, Joanna
Ozimek, Małgorzata
Urzykowska, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1032962.pdf
Data publikacji:
2015
Wydawca:
Wydawnictwo ALUNA
Tematy:
CF
renal function
Opis:
Background: Together with increasing life expectancy of patients with cystic fibrosis (CF), there is a growing need to deal with unforeseen problems and complications. Among others renal dysfunction has become of great concern. Aim: Evaluation of renal function in CF children. Material and methods: We performed cross-sectional study on a group of 11 teenage inpatients with CF. Physical examination, past medical history analysis, renal function measurements and analysis were conducted in all of them. Renal assessment included: serum cystatin C and creatinine levels, measured and estimated creatinine clearance, estimated cystatin C clearance, urine indicators of crystallization risk and renal ultrasonography. Results: One patient had elevated serum cystatin C level and diminished McIsaac equation. Renal ultrasound revealed non-congenital anomaly in 1 case – it was nephrolithiasis. All the individuals had elevated at least 1 urine indicator of crystallization risk. Conclusion: There is a great need of good, standardized test of renal function in cystic fibrosis patients. The focus of research should turn towards finding a tool similar to faecal elastase, which is cheap, easy to perform, sensitive and specific, and can be used to confirm the diagnosis.
Wstęp: Wraz z wzrastającą długością życia chorych na mukowiscydozę (CF), zaistniała potrzeba radzenia sobie z nowymi jej powikłaniami. Między innymi zaburzenie czynności nerek stało się nowym wyzwaniem. Cel: Ocena czynności nerek u dzieci z mukowiscydozą. Materiał i metody: Przeprowadzono badanie przekrojowe na grupie jedenastu nastoletnich pacjentów z CF hospitalizowanych w IMiDz. U wszystkich przeprowadzono dokładny wywiad dotyczący przebiegu choroby, wywiad rodzinny, badanie fizykalne oraz pomiary czynności nerek. Ocena nerek polegała na oznaczeniu: cystatyny C i kreatyniny w surowicy, klirensu kreatyniny oraz klirensu cystatyny C, wskaźników ryzyka krystalizacji moczu i USG nerek. Wyniki: Jeden pacjent miał podwyższone stężenie cystatyny C w surowicy oraz obniżony klirens cystatyny McIsaaca. W 1 przypadku USG nerek wykazało nieprawidłowość − była to kamica nerkowa. U wszystkich badanych pacjentów co najmniej jeden wskaźnik ryzyka krystalizacji moczu był podwyższony. Wniosek: Istnieje wielka potrzeba dobrego, wystandaryzowanego badania czynności nerek u pacjentów z mukowiscydozą. Przedmiotem badań powinno być znalezienie narzędzia podobnego do oznaczenia stężenia elastazy w kale – testu, który jest łatwy do wykonania, czuły i specyficzny oraz może być stosowany w celu potwierdzenia diagnozy.
Źródło:
Developmental Period Medicine; 2015, 1; 98-104
1428-345X
Pojawia się w:
Developmental Period Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Three-Dimensional Simulations of the Anisotropic Etching Profile Evolution for Producing Nanoscale Devices
Autorzy:
Radjenović, B.
Radmilović-Radjenović, M.
Powiązania:
https://bibliotekanauki.pl/articles/1505422.pdf
Data publikacji:
2011-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.65.Cf
Opis:
Refined control of etched profiles is one of the most important tasks of micro (nano) electro mechanical systems manufacturing process. In spite of its wide use, the simulation of etching for micro (nano) electro mechanical systems applications has been so far a partial success only, although a great number of commercial and academic research tools dedicated to this problem are developed. In this paper we describe an application of the sparse field method for solving level set equations in 3D anisotropic wet etching of silicon with potassium hydroxide (KOH). Angular dependence of the silicon etching rate is determined on the basis of the silicon crystal symmetry properties. Some examples illustrating developed methodology are given.
Źródło:
Acta Physica Polonica A; 2011, 119, 3; 447-450
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowa kategoria pacjentów w diagnostyce mukowiscydozy
A new category of patients in the diagnostic process of cystic fibrosis
Autorzy:
Ciastkowska, Martyna
Ciastkowski, Mariusz
Kalicki, Bolesław
Powiązania:
https://bibliotekanauki.pl/articles/1034444.pdf
Data publikacji:
2017
Wydawca:
Medical Communications
Tematy:
CF NBS
CFSPID
CRMS
mukowiscydoza
Opis:
Cystic fibrosis is a congenital genetically determined disorder caused by pathogenic mutations in both alleles of the CFTR protein gene. Due to its common occurrence in the European population as well as severe and chronic course, all neonates in Poland have been screened for this disease since 2009. This enables early diagnosis and specialist care over patients. The introduction of newborn screening has also resulted in distinguishing a new category of patients with the following diagnosis: cystic fibrosis screen positive, inconclusive diagnosis or CFTR-related metabolic syndrome. This group includes children with positive newborn screen results who do not present clinical symptoms suggestive of cystic fibrosis and in whom a mutation of unknown clinical consequences is detected and/or borderline sweat test results arrive in the course of further diagnosis. The prognosis in these patients is uncertain since some of them may develop symptoms of cystic fibrosis or CFTR-related metabolic syndrome at some point in the future while other may remain fully healthy. Patients with an inconclusive diagnosis of cystic fibrosis require specialist care, which enables their further observation, diagnosis or possible verification of the diagnosis and implementation of proper treatment. This strategy gradually supplements the knowledge on mutations that have uncertain clinical consequences. It is also significant that the patient’s family understand possible consequences of a cystic fibrosis screen positive, inconclusive diagnosis (CFSPID).
Mukowiscydoza jest wrodzonym, uwarunkowanym genetycznie zaburzeniem, spowodowanym obecnością patogennych mutacji w obu allelach genu kodującego białko CFTR. Z uwagi na jej częste występowanie w populacji europejskiej oraz ciężki, przewlekły przebieg od połowy 2009 roku wprowadzono w Polsce, na terenie całego kraju, badanie przesiewowe noworodków w kierunku mukowiscydozy. Umożliwia ono wczesne rozpoznawanie chorych i objęcie ich specjalistyczną opieką. Konsekwencją wprowadzenia badania przesiewowego jest również wyodrębnienie nowej kategorii pacjentów, z rozpoznaniem: pozytywny wynik przesiewu, niejednoznaczna diagnoza mukowiscydozy lub zespół metaboliczny zależny od genu CFTR. Są to dzieci z pozytywnym wynikiem przesiewu noworodkowego, u których nie obserwuje się objawów klinicznych sugerujących występowanie mukowiscydozy, a w trakcie dalszej diagnostyki stwierdza się obecność mutacji o nieznanych konsekwencjach klinicznych i/lub graniczne wyniki testu potowego. Rokowanie w przypadku tych dzieci jest niejasne, gdyż u niektórych z nich w przyszłości mogą się rozwinąć objawy mukowiscydozy bądź zespołów zależnych od genu CFTR, inne zaś pozostaną w pełni zdrowe. Pacjenci z niejednoznaczną diagnozą mukowiscydozy wymagają specjalistycznej opieki, co umożliwi ich dalszą obserwację, diagnostykę, a także ewentualną weryfikację rozpoznania i wdrożenie odpowiedniego leczenia. Taka strategia pozwala na stopniowe uzupełnianie wiedzy na temat mutacji o niepewnych konsekwencjach klinicznych. Istotną kwestią jest również zrozumienie przez rodzinę pacjenta, jakie możliwe następstwa niesie ze sobą pozytywny wynik przesiewu noworodkowego.
Źródło:
Pediatria i Medycyna Rodzinna; 2017, 13, 2; 163-169
1734-1531
2451-0742
Pojawia się w:
Pediatria i Medycyna Rodzinna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Predicting Gross Domestic Product Components through Tsallis Entropy Econometrics
Autorzy:
Bwanakare, S.
Cierpiał-Wolan, M.
Mantaj, A.
Powiązania:
https://bibliotekanauki.pl/articles/1398884.pdf
Data publikacji:
2016-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.65.Gh
89.70.cf
Opis:
This article proposes the Tsallis non-extensive entropy econometric approach to forecast components of the country gross domestic product based on the knowledge of time series macroeconomic aggregates of the past period, plus some sparse and imperfect information of the current period. Non-extensive entropy technique has proved to remain a good modelling device not only in the case of high frequency series, but also in the case of aggregated series. To predict the missing GDP components, we set up a q-generalized Kullback-Leibler information divergence criterion function with a priori consistency, GDP related macroeconomic constraints and regular conditions. The model forecasts are compared to the official Polish GDP components of the corresponding period. The proposed Tsallis entropy approach leads to high predictive performance and shows a stronger estimation stability through different model simulations than the traditional Shannon model. Furthermore, as expected this Tsallis related approach seems to reflect a higher stability through parameter computation and simulation in comparison with the traditional Shannon-Gibbs entropy technique.
Źródło:
Acta Physica Polonica A; 2016, 129, 5; 993-996
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Greenhouse Emission Forecast as an Inverse Stochastic Problem: A Cross-Entropy Econometrics Approach
Autorzy:
Bwanakare, S.
Powiązania:
https://bibliotekanauki.pl/articles/1388232.pdf
Data publikacji:
2015-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.65.Gh
89.70.cf
Opis:
This paper proposes the non-extensive entropy econometric approach to predict regional cross-industry greenhouse emissions within a country, based on imperfect knowledge of industrial and regional aggregates. The solution of this stochastic inverse problem is applied to Poland. Non-extensive entropy should remain a valuable device for econometric modelling even in the case of low frequency series since outputs provided by the Gibbs-Shannon entropy approach correspond to the Tsallis entropy limiting case of the Gaussian law when the Tsallis q-parameter equals unity. We, therefore, set up a q-Tsallis-Kullback-Leibler entropy criterion function with a priori consistency constraints, including the environmental Kuznets econometric model and regular conditions. As in the case of Shannon-Gibbs-based entropy models, we found that the Tsallis entropy estimator also belongs to the family of Stein estimators, meaning that smaller probabilities are shrunk and higher probabilities dominate in the solution space. Fortunately, adding more pertinent data to the model priors will enhance parameter precision and then allow for the recovery of the real influence of smaller events. The q-Tsallis-Kullback-Leibler entropy index is computed for different scenarios of the Kuznets model. The model outputs continue to conform to empirical expectations. In spite of the close to unity q-Tsallis parameter, this Tsallis related approach reflects higher stability for parameter computation in comparison with the Shannon-Gibbs entropy econometrics technique.
Źródło:
Acta Physica Polonica A; 2015, 127, 3A; A-13-A-20
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The SAXS and Rheological Studies of HEWL Amyloid Formation
Autorzy:
Szymańska, A.
Ślósarek, G.
Hornowski, T.
Kozak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1812257.pdf
Data publikacji:
2008-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cf
87.14.E-
Opis:
We performed small angle X-ray scattering and rheological experiments in order to analyze the aggregation and denaturation processes of hen egg white lysozyme initiated by the presence of ethanol molecule. At low ethanol concentrations (below 60% (v/v)) we did not observe any change of the radius of gyration of lysozyme and no drastic changes in viscosity of the protein solution. With the increase in ethanol concentration up to the final concentration of 85% (v/v) the viscosity of protein solution dramatically increased. For high ethanol concentration a pseudoplastic behavior of lysozyme solution was observed, indicating a process of aggregation and reorientation of the protein molecules. Similar effects were observed in small angle X-ray scattering experiments. We assume that the analysis of the aggregation processes of the hen egg white lysozyme could contribute to our understanding of the mechanism of lysozyme amyloid formation.
Źródło:
Acta Physica Polonica A; 2008, 114, 2; 447-454
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Dependence of the Self-Broadened 540.06 nm Neon Line
Autorzy:
Leo, P. J.
Mullamphy, D. F. T.
Peach, G.
Venturi, V.
Whittingham, I. B.
Powiązania:
https://bibliotekanauki.pl/articles/1968841.pdf
Data publikacji:
1998-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Jz
34.20.Cf
Opis:
Quantum close-coupled calculations of the collisional self-broadening of the 540.06 nm neon line (3s[3/2]$\text{}_{1}$-3p'[1/2]$\text{}_{0}$) are presented for temperatures from 70 K to 900 K. These calculations are based on the quantum-mechanical impact theory of Baranger and represent the interatomic interaction by adiabatic molecular potentials calculated using model potentials for the electron- atom and atomic core-core interactions. The calculated widths and shifts vary smoothly with temperature and are accurately given across the temperature range by fourth order polynomial fits.
Źródło:
Acta Physica Polonica A; 1998, 93, 3; 459-464
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Structure of KMgH$\text{}_{3}$, KMgH$\text{}_{2}$F, KMgF$\text{}_{3}$ with the Perovskite Structure
Autorzy:
Balawender, R.
Gupta, M.
Orgaz, E.
Komorowski, L.
Powiązania:
https://bibliotekanauki.pl/articles/1943944.pdf
Data publikacji:
1995-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Cf
71.25.Pi
Opis:
The electronic structures of fluoroperovskite KMgF$\text{}_{3}$, hydridoperovskite KMgH$\text{}_{3}$ and the dihydrido-fluoro derivated KΜgH$\text{}_{2}$F have been investigated. The energy bands, density of electronic states and partial wave analysis of the density of electronic states have been determined by means of the non-self-consistent augmented plane wave method with the von Barth-Hedin parametrization for the exchange-correlation term. Our results indicate that all three compounds are ionic insulators. Replacing the hydrogen atom by fluorine atom leads to increasing in the energy gap.
Źródło:
Acta Physica Polonica A; 1995, 88, 6; 1133-1141
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Non-Extensive Entropy Econometric Model (NEE): the Case of Labour Demand in the Podkarpackie Province
Autorzy:
Bwanakare, S.
Powiązania:
https://bibliotekanauki.pl/articles/1538500.pdf
Data publikacji:
2010-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.65.Gh
89.70.cf
Opis:
The non-extensive entropy (NEE) principle has been successfully applied in the case of high frequency financial market analysis. I try to extend the approach to empirical social sciences and propose a competitive estimation approach with respect to classical econometrical methods. This article constitutes a limited extension of Jaynes-Shannon-Gibbs' (JSG) ergodic system formalism already applied to classical econometrics. The Podkarpackie private labour demand model is then developed and its outputs presented. A constrained weighted dual criterion function maximising entropy probabilities for parameter and disturbance components is derived and its inferential information indexes are proposed and computed. We note that the increase of relative weights on disturbance component leads to higher values of q, the entropic index of generalized Tsallis entropy. Smaller disturbance weights produce q values closer to unity. Outputs then converge to those displayed by the competitive JSG and least squares (LS) approaches. However, finding out an inferential rule delimiting the critical q values for Gaussian distribution interval remains of high interest. In terms of economics, the results of the proposed model show a realistic adjusting speed mechanism of actual lever of employment to its long run targeted equilibrium level owing to expected market profits.
Źródło:
Acta Physica Polonica A; 2010, 117, 4; 647-651
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Stochastic Non-Homogeneous Constant Elasticity of Substitution Production Function as an Inverse Problem: A Non-Extensive Entropy Estimation Approach
Autorzy:
Bwanakare, S.
Powiązania:
https://bibliotekanauki.pl/articles/1400164.pdf
Data publikacji:
2013-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.65.Gh
89.70.cf
Opis:
The document proposes a new entropy-based approach for estimating the parameters of nonlinear and complex models, i.e. those whose no transformation renders linear in parameters. Presently, for estimating such class of functions, various iterative technics like the Gauss-Newton algorithm are applied and completed by the least square methods approaches. Due to conceptual nature of such methods, definitely estimated functions are different from the original nonlinear one and the estimated values of parameters are in most of cases far from the true values. The proposed approach, being related to the statistical theory of information, is very different from those so far applied for that class of functions. To apply the approach, we select a stochastic non-homogeneous constant elasticity of substitution aggregated production function of the 27 EU countries which we estimate maximizing a non-extensive entropy model under consistency restrictions related to the constant elasticity of substitution model plus regular normality conditions. The procedure might be seen as an attempt to generalize the recent works (e.g. Golan et al. 1996) on entropy econometrics in the case of ergodic systems, related to the Gibbs-Shannon maximum entropy principle. Since this nonlinear constant elasticity of substitution estimated model contains four parameters in one equation and statistical observations are limited to twelve years, we have to deal with an inverse problem and the statistical distribution law of the data generating system is unknown. Because of the above reasons, our approach moves away from the normal Gaussian hypothesis to the more general Levy instable time (or space) processes characterized by long memory, complex correlation and by a convergence, in relative long range, to the attraction basin of the central theorem limit. In such a case, fractal properties may eventually exist and the q non extensive parameter could give us useful information. Thus, as already suggested, we will propose to solve for a stochastic inverse problem through the generalized minimum entropy divergence under the constant elasticity of substitution model and other normalization factor restrictions. At the end, an inferential confidence interval for parameters is proposed. The output parameters from entropy formalism represent the long-run state of the system in equilibrium, and so, their interpretation is slightly different from the "ceteris paribus" interpretation related to the classical econometrical modeling. The approach seems to produce very efficient parameters in comparison to those obtained from the classical iterative nonlinear method which will be presented, too.
Źródło:
Acta Physica Polonica A; 2013, 123, 3; 502-507
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Characterization of Hybrid Tunnel Magnetoresistance Structures with Embedded Self-Assembled Nanoparticle Templates
Autorzy:
Siffalovic, P.
Majkova, E.
Chitu, L.
Halahovets, Y.
Jergel, M.
Senderak, R.
Luby, S.
Weis, M.
Satka, A.
Szymański, B.
Stobiecki, F.
Timmann, A.
Roth, S.
Powiązania:
https://bibliotekanauki.pl/articles/1810565.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cf
61.46.Df
Opis:
We report on an incorporation of self-assembled templates of superparamagnetic Fe-O nanoparticles into tunnel magnetoresistance devices. We fabricated a multilayer stack composed of the following layer sequence: Cr/Au/Co/NP/Co/Cu on Si(100) substrate where NP stands for a self-assembled layer of nanoparticles deposited by the Langmuir-Blodgett technique. The X-ray reflectivity and grazing-incidence small angle X-ray scattering were employed to study the layers thicknesses and interface morphology in each preparation step. In particular, the grazing-incidence small angle X-ray scattering was measured before and after the nanoparticle incorporation as well as on the complete tunnel magnetoresistance stack. In this way, in-depth morphology profile during subsequent preparation steps was obtained. We demonstrate that X-ray analysis of the deposited tunnel magnetoresistance stack is essential for successful fabrication of novel hybrid devices consisting of self-assembled nanoparticles.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 332-335
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cystic fibrosis and pregnancy – literature review
Mukowiscydoza a ciąża – przegląd piśmiennictwa
Autorzy:
Krawczyk, Patrycja
Sioma-Markowska, Urszula
Krówka, Dominika
Machura, Mariola
Kubaszewska, Sylwia
Skrzypulec-Plinta, Violetta
Sodowska, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/1036488.pdf
Data publikacji:
2016
Wydawca:
Śląski Uniwersytet Medyczny w Katowicach
Tematy:
cystic fibrosis
pregnancy
labor
diet of pregnant women with cf
ciąża
poród
mukowiscydoza
dieta ciężarnej z cf
Opis:
This paper reviews the literature on the course of pregnancy how to sustaining it as well as delivery in women with diagnosed Cystic fibrosis. Cystic fibrosis (CF) is a recessive autosomal disease occurring mostly among Caucasians. 1500 cases of the disease have been recorded in Poland and almost 70.000 people around the world suffer from it. The latest research shows that the average life span is 30 and is growing steadily due to proper diagnostics and appropriate treatment. A particular challenge for medicine is to sustain pregnancy in women with diagnosed CF. The paper collects and summarizes reccomendations for sustaining pregnancy and for childbirth in CF patients.
Mukowiscydoza jest chorobą autosomalną recesywną występującą najczęściej wśród rasy kaukaskiej. W Polsce zanotowano około 1500 przypadków choroby, na świecie na mukowiscydozę choruje blisko 70 tys. osób. Z najnowszych badań wynika, że średni okres przeżywalności szacuje się na 30 lat i ciągle wzrasta za sprawą prawidłowej diagnostyki oraz odpowiedniego leczenia. Szczególnym wyzwaniem dla medycyny staje się prowadzenie ciąży u kobiety z rozpoznaną mukowisydozą (CF – cystic fibrosis). Ciąża u kobiety chorej na CF jest ciążą wysokiego ryzyka. W pracy dokonano przeglądu danych literaturowych dotyczących przebiegu i prowadzenia ciąży oraz porodu u kobiet z rozpoznaną mukowiscydozą.
Źródło:
Annales Academiae Medicae Silesiensis; 2016, 70; 84-88
1734-025X
Pojawia się w:
Annales Academiae Medicae Silesiensis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The initiatives supported by reward-based crowdfunding in Poland
Autorzy:
Kędzierska-Szczepaniak, Angelika
Powiązania:
https://bibliotekanauki.pl/articles/420088.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
community
crowdfunding
CF platforms
reward-based crowdfunding
Opis:
Crowdfunding is a type of financing that is popular not only among entrepreneurs. There are examples of financing sport, culture, music or just someone’s dreams, and many good projects could not have been realized without crowdfunding. The analysis of the largest projects realized on one of the Poland’s oldest and biggest Polish crowdfunding platform – polakpotrafi.pl will be made in the article. It will be the background to formulate some conclusions about the initiatives supported by reward-based crowdfunding platforms. It can be hypothesized that crowdfunding in Poland is developing rapidly but the value and number of projects is still lower than in Western Europe countries and the USA. The research methods used in the article are primarily a statistical and comparative method and case study analysis. The data from the European Commission, the World Bank and crowdfunding platforms will be used.
Źródło:
Nauki o Zarządzaniu; 2018, vol. 23 no. 4; 18-27
2080-6000
Pojawia się w:
Nauki o Zarządzaniu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of obstruent voicing on vowel F0: Implications for laryngeal realism
Autorzy:
Kirby, James
Ladd, D. Robert
Powiązania:
https://bibliotekanauki.pl/articles/2134961.pdf
Data publikacji:
2018-12-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
laryngeal realism
voicing
CF0
phonetic grounding
privativity
Opis:
In this paper, we present data on obstruent-intrinsic F0 perturbations (CF0) in two [voice] languages, French and Italian. Voiceless obstruents in both languages are found to raise F0, while F0 following (pre)voiced obstruents patterns together with sonorants, similar to the voiceless unaspirated stops of [spread glottis] languages like German and English. The contextual stability of this cue implies that an active de-voicing gesture is common to languages of both the [voice] and [spread glottis] types, and undermines the idea that a strict binary dichotomy between true voicing and aspirating languages can be reliably inferred based on properties of the surface phonetics.
Źródło:
Yearbook of the Poznań Linguistic Meeting; 2018, 4, 1; 213-235
2449-7525
Pojawia się w:
Yearbook of the Poznań Linguistic Meeting
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low Resolution Structure of RAR1-GST-Tag Fusion Protein in Solution
Autorzy:
Taube, M.
Jarmołowski, A.
Kozak, M.
Powiązania:
https://bibliotekanauki.pl/articles/1538891.pdf
Data publikacji:
2010-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cf
87.14.E-
87.14.et
Opis:
RAR1 is a protein required for resistance mediated by many R genes and function upstream of signaling pathways leading to $H_{2}O_{2}$ accumulation. The structure and conformation of RAR1-GST-Tag fusion protein from barley (Hordeum vulgare) in solution was studied by the small angle scattering of synchrotron radiation. It was found that the dimer of RAR1-GST-Tag protein is characterized in solution by radius of gyration $R_G$ = 6.19 nm and maximal intramolecular vector $D_{max}$ = 23 nm. On the basis of the small angle scattering of synchrotron radiation SAXS data two bead models obtained by ab initio modeling are proposed. Both models show elongated conformations. We also concluded that molecules of fusion protein form dimers in solution via interaction of GST domains.
Źródło:
Acta Physica Polonica A; 2010, 117, 2; 307-310
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Silicon Etching in $XeF_2$ Environment
Autorzy:
Knizikevičius, R.
Powiązania:
https://bibliotekanauki.pl/articles/1400495.pdf
Data publikacji:
2013-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.65.Cf
82.35.Gh
82.65.+r
Opis:
Enhancement of silicon etching rate in $XeF_2$ environment is considered by a proposed model, which includes processes of adsorption, activation, chemical reactions, relaxation, desorption, and sputtering. The enhancement of silicon etching rate is explained by considering hydrocarbon molecules from background gas contamination in the vacuum chamber, and assuming that hydrocarbon radicals enhance the etching rate. The composition of the adsorbed layer during silicon etching in $XeF_2$ environment is calculated. It is found that hydrocarbon radicals intensify reaction of $XeF_2$ molecules with Si atoms on the surface and that this changes the kinetics of the etching rate. Using the obtained theoretical results the difference in kinetics of the etching rates of first and subsequent run is explained.
Źródło:
Acta Physica Polonica A; 2013, 124, 1; 137-140
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Small-Angle X-Ray Scattering Studies of Pore Structure in Cellulose Membranes
Autorzy:
Ślusarczyk, Cz.
Fryczkowska, B.
Sieradzka, M.
Janicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1398822.pdf
Data publikacji:
2016-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cf
68.55.J-
82.35.Pq
Opis:
Small-angle X-ray scattering experiments were carried out on cellulose membranes obtained by phase inversion from a solution of the polymer in 1-ethyl-3-methylimidazolium acetate, by coagulation in water and selected primary alcohols. The invariant, Q, and the Guinier radius, $R_{G}$, computed directly from the small-angle X-ray scattering curve allowed us to estimate the pore dimensions and the pore volume fraction. It was found that both content and dimensions of pores depend on molecular mass of the coagulant used. Also, it was found that the dipole moment of coagulant molecules has a large influence on the volume content of the pores.
Źródło:
Acta Physica Polonica A; 2016, 129, 2; 229-232
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of Shallow Dislocations on 4H-SiC Substrate by Etching Method
Autorzy:
Ishikawa, Y.
Yao, Y.
Sato, K.
Sugawara, Y.
Danno, K.
Suzuki, H.
Bessho, T.
Kawai, Y.
Shibata, N.
Powiązania:
https://bibliotekanauki.pl/articles/1492539.pdf
Data publikacji:
2011-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.uj
81.65.Cf
68.37.Lp
Opis:
Correlation between dislocation types in epitaxial 4H-SiC and etch pit types on the 4H-SiC wafer surface were investigated by etch pit method and transmission electron microscope. Shallow dislocation on the wafer was found to form round pit without core. The shallow dislocation was estimated half-loop type in wafer and this estimation explains that step-flow growth converts half-loop dislocation into complex dislocation composed by threading dislocation and basal plane dislocation.
Źródło:
Acta Physica Polonica A; 2011, 120, 6A; A-025-A-027
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some Remarks on Pressure Effects on 2p$\text{}^{5}$3p-2p$\text{}^{5}$ns (n=5, 6, 7) Transitions in Neon
Autorzy:
Bielski, A.
Szudy, J.
Trawiński, R. S.
Wolnikowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1920507.pdf
Data publikacji:
1992-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Jz
33.70.Jg
34.20.Cf
Opis:
The collisional broadening and shift of 494.5 nm spectral line of neon arising from 2p$\text{}^{5}$3p-2p$\text{}^{5}$ns7s transition, emitted from a low-pressure glow discharge in pure neon and neon-helium mixtures have been measured. The values of pressure broadening and shift coefficients were determined. Experimental data of 494.5 nm line as well as our earlier results for spectral lines originating from the 2p$\text{}^{5}$3p-2p$\text{}^{5}$ns7s (n = 5, 6) transitions are compared with those resulting from the Kaulakys and Ueda theories of pressure effects on Rydberg states.
Źródło:
Acta Physica Polonica A; 1992, 81, 3; 369-378
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automation and Remote Synchrotron Data Collection
Autorzy:
Gilski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1812241.pdf
Data publikacji:
2008-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.85.Qe
61.05.cp
61.05.cf
Opis:
X-ray crystallography is the natural choice for macromolecular structure determination by virtue of its accuracy, speed, and potential for further speed gains, while synchrotron radiation is indispensable because of its intensity and tuneability. Good X-ray crystallographic diffraction patterns are essential and frequently this is achievable through using the few large synchrotrons located worldwide. Beamline time on these facilities have long queues, and increasing the efficiency of utilization of these facilities will help in expediting the structure determination process. Automation and remote data collection are therefore essential steps in ensuring that macromolecular structure determination becomes a very high throughput process.
Źródło:
Acta Physica Polonica A; 2008, 114, 2; 331-338
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Mo-Ni Alloys by X-Ray Spectroscopies
Autorzy:
Ławniczak-Jabłońska, K.
Heinonen, M.
Inoue, J.
Tohyama, T.
Powiązania:
https://bibliotekanauki.pl/articles/1924333.pdf
Data publikacji:
1993-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.Cf
78.70.En
79.60.-i
Opis:
Band structure investigations of the random MoNi$\text{}_{4}$ and MoNi$\text{}_{3}$ alloys, performed by emission and photoelectron spectroscopy, is reported. The X-ray emission and X-ray photoelectron spectra allowed to study the occupied valence band states below Fermi level. These techniques gave the full description of changes in the density of valence electron states distribution due to substitution of Mo atoms into the fcc Ni lattice up to 25 at%. The analysis of the emission and photoelectron spectra led to clear distinction between the changes in spectra caused by density of states structure and by additional effects involved in creation of the particular spectra. The experimental data are compared with the density of states calculated using coherent potential approximation and linear muffin-tin orbital methods.
Źródło:
Acta Physica Polonica A; 1993, 83, 1; 115-124
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A New Approach to Deriving Interatomic Many-Body Interactions in Metals
Autorzy:
Gurskii, Z.
Krawczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/1992708.pdf
Data publikacji:
1998-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.15.Nc
71.15.Hx
34.20.Cf
Opis:
An original method of treating the kinetic and exchange-correlation energies functionals in terms of many particle interactions was developed. It is based on utilizing the local density approximation. The total electron density, extracted from the ab initio band structure calculations, is expressed as a linear superposition of contributions from the individual pseudoions embedded in the uniform background. The explicit expressions for the pair and triplet potentials are presented. The general form for the part of the pair interatomic interactions caused by the kinetic and the exchange-correlation effects is obtained. Relationship between the developing approach and the perturbation theory in pseudopotential is analysed. Unlike the perturbation theory the advanced approach allows one to calculate accurately the so-called reducible contributions to the pair potential arising from the n -particle (n>2) interactions. It corresponds to summing certain series in pseudopotential. Contribution of the electron-nonlocal pseudopotential interactions to the pair interatomic ones is considered within the concept of the fully separable pseudopotentials.
Źródło:
Acta Physica Polonica A; 1998, 94, 4; 671-682
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of Imperfections in ⟨100⟩ SrLaAlO$\text{}_{4}$ Crystals
Autorzy:
Doerschel, J.
Hähnert, I.
Uecker, R.
Powiązania:
https://bibliotekanauki.pl/articles/1964346.pdf
Data publikacji:
1997-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.65.Cf
81.30.Mn
61.72.Ff
Opis:
In Czochralski-grown SrLaAlO$\text{}_{4}$ crystals with ⟨100⟩ orientation, (001) planar faults extending through the entire crystal boule can frequently be observed. Chemical etching and transmission electron microscopy including energy dispersive X-ray spectroscopy were used to characterise their nucleation sites, these being located in the upper part of the crystal cone. Three serious sources were found: (1) lateral {001} facets, (2) grown-in defects in the seed, and (3) small particles of a second phase in the interior of the cone. These particles were identified as trigonal and cubic form of lanthanum oxide with a different Sr content.
Źródło:
Acta Physica Polonica A; 1997, 92, 1; 157-162
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Asymmetric Voigt Profile and Complex Error Functions in Terms of the Kummer Functions
Autorzy:
Di Rocco, H. O.
Aguirre Téllez, M.
Powiązania:
https://bibliotekanauki.pl/articles/2041591.pdf
Data publikacji:
2004-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Jz
33.70.Jg
34.20.Cf
Opis:
In this work we present the explicit representations of the Voigt function K(a,b) (the convolution between a Gaussian and a Lorentzian function), the function N(a,b) defined as the convolution of Gaussian and dispersion distributions as well as the complex error function erf(a+ib), all in terms of the Kummer functions M(α,γ,a$\text{}^{2}$). The expansions are valid for all values of the parameter a (the relation between Lorentzian and Gaussian widths at the half maxima). Previous analytical works were known only when the parameter a≤1, or were based on numerical interpolations or empirical approximations. Also, new series and asymptotic expansions are presented.
Źródło:
Acta Physica Polonica A; 2004, 106, 6; 817-826
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response of Scanning Fabry-Pérot Interferometer to Speed-Dependent Asymmetric Voigt Profile
Autorzy:
Bielski, A.
Brym, S.
Ciuryło, R.
Jurkowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1945728.pdf
Data publikacji:
1996-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Jz
33.70.Jg
34.20.Cf
Opis:
A detailed analysis of the deviations from the Voigt profile caused by the correlation effects and collision-time asymmetry observed by means of a Fabry-P'erot interferometer is presented. An expression for the response of scanning Fabry-P'erot interferometer to the speed-dependent asymmetric Voigt profile is derived.
Źródło:
Acta Physica Polonica A; 1996, 90, 3; 523-529
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Structure of Zinc-Blende Zn$\text{}_{0.5}$Co$\text{}_{0.5}$Se: Theoretical Study
Autorzy:
Hołda, A.
Markowski, R.
Dębowska, D.
Kisiel, A.
Zimnal-Starnawska, M.
Piacentini, M.
Zema, N.
Lama, F.
Powiązania:
https://bibliotekanauki.pl/articles/1950806.pdf
Data publikacji:
1996-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.-b
71.20.Cf
71.70.-d
Opis:
In this paper we present partial densities of states for spin-polarized antiferromagnetic phase of Zn$\text{}_{0.5}$Co$\text{}_{0.5}$Se as well as schematic layouts of the bands, obtained using the ab initio self-consistent semi-relativistic linear muffin tin orbital method. We also present, from theoretical point of view, the analysis of influence of the transition metal cobalt on the electronic structure of a pure ZnSe.
Źródło:
Acta Physica Polonica A; 1996, 90, 4; 817-820
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Broadening and Shift of the 326.1 nm Cd Line by He and Ne
Autorzy:
Bielski, A.
Brym, S.
Ciurylo, R.
Domysławska, J.
Lednev, M. G.
Trawiński, R. S.
Powiązania:
https://bibliotekanauki.pl/articles/1952749.pdf
Data publikacji:
1996-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Jz
33.70.Jg
34.20.Cf
Opis:
The experimental values of pressure broadening and shift parameters of the 326.1 nm Cd line perturbed by He and Ne, are compared with those calculated from the adiabatic and nonadiabatic approaches to the impact theory for different interaction potentials.
Źródło:
Acta Physica Polonica A; 1996, 90, 6; 1155-1167
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electronic Structure of Zinc-Blende Zn$\text{}_{0.5}$V$\text{}_{0.5}$Se: Theoretical Study
Autorzy:
Markowski, R.
Hołda, A.
Dębowska, D.
Kisiel, A.
Zimnal-Starnawska, M.
Piacentini, M.
Zema, N.
Lama, F.
Powiązania:
https://bibliotekanauki.pl/articles/1934068.pdf
Data publikacji:
1995-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.20.-b
71.70.-d
71.20.Cf
Opis:
In this paper we present a comprehensive study of electronic structure of Zn$\text{}_{0.5}$V$\text{}_{0.5}$Se from the theoretical point of view. Partial and total density of states for spin-polarized antiferromagnetic phase of Zn$\text{}_{0.5}$V$\text{}_{0.5}$Se as well as schematic layouts of the bands have been obtained using the ab initio self-consistent semirelativistic linear muffin-tin orbital method.
Źródło:
Acta Physica Polonica A; 1995, 88, 5; 1023-1027
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The C$\text{}^{1}$Σ$\text{}^{+}$ State of KLi Studied by Polarisation Labelling Spectroscopy Technique
Autorzy:
Grochola, A.
Kowalczyk, P.
Jastrzębski, W.
Crozet, P.
Ross, A. J.
Powiązania:
https://bibliotekanauki.pl/articles/2035622.pdf
Data publikacji:
2002-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.20.Kf
33.15.-e
34.20.Cf
Opis:
The polarisation labelling spectroscopy method is applied to study the C$\text{}^{1}$Σ$\text{}^{+}$← X$\text{}^{1}$ Σ$\text{}^{+}$ band system of the KLi molecule. Rotationally resolved polarisation spectra are observed in the spectral range of 17150-20350 cm$\text{}^{-1}$. A set of Dunham coefficients describes the C$\text{}^{1}$Σ$\text{}^{+}$ state to 95% of its potential well depth, and the potential curve is constructed by the Rydberg-Klein-Rees procedure. The molecular parameters deduced from this work are compared with theoretical calculations.
Źródło:
Acta Physica Polonica A; 2002, 102, 6; 729-738
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differential Equation for Asymmetric Voigt Profile
Autorzy:
Ciuryło, R.
Domysławska, J.
Trawiński, R. S.
Powiązania:
https://bibliotekanauki.pl/articles/1929159.pdf
Data publikacji:
1993-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
32.70.Jz
33.70.Jg
34.20.Cf
Opis:
The second-order differential equation for the asymmetric Voigt profile is presented, leading to a powerful and accurate method of determining the line shape parameters.
Źródło:
Acta Physica Polonica A; 1993, 83, 4; 425-430
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of Intrinsic Defects in CaYAl₃O₇
Autorzy:
da C. Bispo, G.
Jackson, R.
Valerio, M.
Powiązania:
https://bibliotekanauki.pl/articles/1029677.pdf
Data publikacji:
2018-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Bn
61.72.-y
34.20.Cf
Opis:
CaYAl₃O₇ presents a challenge for computer modelling techniques because of its site-occupancy disorder related to the Ca/Y shared site. Supercells were built to reproduce experimental results which have the best agreement and lowest lattice energy. The potential parameters were obtained by empirical fitting, and reproduced the structure to within 1.09%. Results obtained by supercell and the Mott-Littleton methods were compared. Both methods predict oxygen Frenkel defects are likely to be formed.
Źródło:
Acta Physica Polonica A; 2018, 133, 4; 781-784
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Pressure Effect on Glass Formation and Cluster Structure Evolution during Cooling Process of PdNi Alloy: A Molecular Dynamics Study
Autorzy:
Kazanc, S.
Celik, F.
Powiązania:
https://bibliotekanauki.pl/articles/1195946.pdf
Data publikacji:
2014-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.pe
83.10.Rs
34.20.Cf
Opis:
Based on the embedded atom method a molecular dynamics simulation technique has been used to study the glass formation and atomic short range order in Pd-Ni binary alloy. By using radial distribution functions and Honeycutt-Andersen pair analysis methods, the structural development of this alloy is studied by quenching from the liquid at two different cooling rates and under 0 and 5 GPa pressures. The results show that the variation of local atomic bonded pairs is of great importance to understand the glass formation process and increase of the number of the ideal icosahedra under high pressure contributes to more ideal glass formation of model alloy.
Źródło:
Acta Physica Polonica A; 2014, 125, 1; 49-53
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Micropatterning of Silicon Surface by Direct Laser Interference Lithography
Autorzy:
Lorens, M.
Zabila, Y.
Krupiński, M.
Perzanowski, M.
Suchanek, K.
Marszałek, K.
Marszałek, M.
Powiązania:
https://bibliotekanauki.pl/articles/1490253.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.55.-a
81.16.-c
81.65.Cf
Opis:
Direct laser interference lithography is a new and low cost technique which can generate the line- or dot-like periodic patterns over large areas. In the present work, we report on direct fabrication of micrometer structures on Si surface. In the experiments the pulsed high power Nd:YAG laser operating at 1064 nm wavelength was used. Two-beam configuration with an angle of incidence of 40° was employed and different laser fluences up to 2.11 J/$cm^2$ were tested. Areas about 1 cm in diameter have been processed with a single pulse of 10 ns. The laser treated samples were analyzed by atomic force microscopy to investigate the surface topography and to measure the size and depth of the achieved structures. We observed periodic line-like arrays with grating period of the order of 1 μm.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 543-545
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of the Red Light on Reactive Oxygen Species Production by Neutrophils in Vitro
Autorzy:
Nawrocka-Bogusz, H.
Jaroszyk, F.
Powiązania:
https://bibliotekanauki.pl/articles/1490445.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.50.W-
87.17.-d
82.30.Cf
Opis:
The aim of this study was to investigate the effect of the red light (630 nm) upon reactive oxygen species production by neutrophils in vitro. Blood samples were used for the study. The flow cytometry method was used for estimation of hydrogen peroxide production. A statistically significant decrease of reactive oxygen species production by neutrophils was observed. The level of the decrease varied and it was dependent on the kind of spectrum of applied signals and different levels of energy light.
Źródło:
Acta Physica Polonica A; 2012, 121, 1A; A-057-A-060
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Accurate Displacement Detection with a Computer-Aided Interferometric Measuring System
Autorzy:
Gökhan Böcekçi, V.
Selçuk Varol, H.
Powiązania:
https://bibliotekanauki.pl/articles/1490989.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
06.30.Bp
42.87.Bg
42.62.Cf
Opis:
In this study, real time measurement of the linear expansion of industrial material undergoing temperature change by using a computer-aided interferometric measuring technique with micrometer accuracy is attempted. Aluminum and copper were subjected to temperature change in the thermal expansion experiment unit (LETI-1) causing them to expand linearly. The fringe number in the interference symbol, which includes the information about linear expansion and temperature change were transferred to a computer via a data acquisition card, graphed by a program created in the LabVIEW environment, and the amount of linear expansion was detected in real time.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 181-183
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Efficiency of Polish Stock Market: Ordinal Patterns Approach
Autorzy:
Graff, G.
Kaczkowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/1400169.pdf
Data publikacji:
2013-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
89.65.Gh
89.70.Cf
89.75.Kd
Opis:
Zunino et al. analyzed the problem of discrimination of developed and emergent markets by the use of ordinal patterns methods: number of forbidden patterns and ordinal pattern probability distribution as a basis for entropy and statistical measure of complexity. In this paper we apply the same methodology for the analysis of Polish stock market (index WIG). The results indicate that Polish market belongs neither to developed, nor to emergent groups of markets. It represents hybrid market, the third group distinguished in the paper by Zunino et al.
Źródło:
Acta Physica Polonica A; 2013, 123, 3; 526-528
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Desorption Activation Energy of $SiBr_2$ Molecules according to Steady-State Approximation
Autorzy:
Knizikevičius, R.
Powiązania:
https://bibliotekanauki.pl/articles/1365355.pdf
Data publikacji:
2014-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.65.Cf
82.20.Db
82.20.Pm
Opis:
The chemical etching of intrinsic and n-type polycrystalline silicon in $Br_2$ ambient is considered. The theoretically calculated dependences of silicon etching rates on pressure of $Br_2$ molecules at different temperatures are compared with experimentally measured ones. The reaction and desorption activation energies are evaluated. It is found that activation energy of Si + $Br_2$ → $SiBr_2$ reaction for intrinsic silicon is equal to (1.82 ± 0.24) eV, and decreases to (1.45 ± 0.24) eV when n-type silicon films are used. Desorption activation energy of $SiBr_2$ molecules for intrinsic silicon is equal to (1.94 ± 0.17) eV, and decreases to (1.51 ± 0.17) eV when n-type silicon films are used. Desorption of $SiBr_2$ molecules is an etching-rate limiting process at high pressure of $Br_2$ molecules.
Źródło:
Acta Physica Polonica A; 2014, 125, 5; 1240-1243
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Broadening and Shift of 326.1 nm Cd Line by Ar and Kr
Autorzy:
Brym, S.
Powiązania:
https://bibliotekanauki.pl/articles/1858145.pdf
Data publikacji:
1997-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
33.70.Jg
32.70.Jz
34.20.Cf
Opis:
Using the Baranger nonadiabatic impact theory for different interaction potentials the values of pressure broadening and shift parameters for the 326.1 nm Cd line perturbed by Ar and Kr were calculated. Results are compared with both experimental values and those calculated in our previous papers using an adiabatic treatment.
Źródło:
Acta Physica Polonica A; 1997, 91, 3; 505-511
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Study of Positronic Atoms with Adiabatic Separation of Positronic Motion
Autorzy:
Strasburger, K.
Wołcyrz, M.
Powiązania:
https://bibliotekanauki.pl/articles/1812552.pdf
Data publikacji:
2008-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
34.20.Cf
31.50.Bc
36.10.Dr
Opis:
A modified adiabatic approximation, with the positron treated as a light nucleus and its charge included only partially in the electronic Hamiltonian, was applied to compute the energies and properties of bound states of lithium positride, positronic beryllium and positronic magnesium. The electronic Schrödinger equation was solved with the configuration interaction method. No bound state was obtained for lithium positride, while the dissociation energies of positronic beryllium and positronic magnesium were underestimated by 2.6 and 7 millihartrees, respectively. Consequences for the applicability of the adiabatic approximation to describe positronic systems are discussed.
Źródło:
Acta Physica Polonica A; 2008, 113, 5; 1533-1542
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Electroporation Threshold for Different Cell Lines in vitro
Autorzy:
Saulis, G.
Saulė, R.
Powiązania:
https://bibliotekanauki.pl/articles/1807913.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.50.cj
87.80.Fe
87.50.cf
Opis:
The electroporation threshold was compared at various electric pulse durations for three cell lines: two non-tumor cell lines (human erythrocytes and Chinese hamster ovary cells) and one tumor cell line (rat glioma C6 cells). First, the dependences of the fraction of electroporated cells on the pulse intensity were obtained for the cells exposed to single square-wave electric pulses with the durations of 0.02-2 ms. Then, the average cell radii were measured for each cell line and the transmembrane potential induced by the external electric field was calculated. The obtained values of the transmembrane potential were in the range of 480-930 mV and decreased with increasing pulse duration. The obtained dependences of the transmembrane potential required to electroporate 50% of cells on the pulse duration were close to each other for all cell lines studied.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1056-1058
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-Voltage Pulses Potentiate Bleomycin Cytotoxicity Towards Cancer Cells in vitro
Autorzy:
Saulė, R.
Saulis, G.
Batiuškaitė, D.
Powiązania:
https://bibliotekanauki.pl/articles/1807930.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
87.50.cj
87.80.Fe
87.50.cf
Opis:
In this study the influence of high-voltage pulses on bleomycin cytotoxicity towards mouse hepatoma MH-22A and rat glioma C6 cells in vitro was determined. It was obtained that combining bleomycin with pulses of strong electric field significantly enhances the number of cells killed by bleomycin. Bleomycin alone was cytotoxic to both cell lines at concentrations above 1 μM. Treatment of cells by electric pulses in the presence of bleomycin greatly potentiated its cytotoxicity towards both cell lines tested - the bleomycin concentration required to reduce cell survival by 50% was 3.5-3.8 nM only. Exposure of cells to electric pulses only did not reduce cell viability.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1098-1100
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxidation of Stainless Steel by Laser Cutting
Autorzy:
Amulevičius, A.
Mažeika, K.
Sipavičius, Č.
Powiązania:
https://bibliotekanauki.pl/articles/1808017.pdf
Data publikacji:
2009-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
42.62.Cf
82.80.Ej
81.65.Mq
Opis:
Oxidation of erosion products was studied by means of the Mössbauer spectroscopy and X-ray diffraction methods when the strip of stainless steel was cut with the laser. Different content of wustite and chromium doped magnetite $Fe_{3-x}Cr_{x}O_{4}$ was found in the samples of erosion products depending on the place where the erosion products were collected in relation to the cutting slot. Conversion electron Mössbauer spectroscopy data showed that more magnetite was found at the surface while wustite distributes in the whole volume of particles of erosion products.
Źródło:
Acta Physica Polonica A; 2009, 115, 5; 880-885
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TP53 and mutations in human cancer.
Autorzy:
Szymańska, Katarzyna
Hainaut, Pierre
Powiązania:
https://bibliotekanauki.pl/articles/1043670.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
CF DNA
cancer
mutation fingerprint
mutation
Ser-249
TP53
Opis:
TP53 is the most frequently mutated gene in human cancer, with a predominance of missense mutations scattered over 200 codons. In many cancers, specific mutation patterns can be identified, which are shaped by site-specific mutagenesis and by biological selection. In tobacco-related cancers (lung, head and neck), organ-specific patterns are observed, with many mutations compatible with the ones experimentally induced by tobacco carcinogens. In several other cancers, such as squamous cell carcinoma of the oesophagus or hepatocellular carcinoma (HCC), mutation patterns show geographic variations between regions of high and low incidence, suggesting a role for region-specific risk factors. HCC from high-incidence regions showing also a high prevalence of a specific Ser-249 TP53 mutation is one of the most striking examples of a mutagen fingerprint. All such assessments are useful to generate clues on the mutagenic mechanisms involved in human cancer. Moreover, it has been shown that DNA retrieved from plasma can be successfully used for detection of TP53 mutations, which gives hope for earlier more accurate detection of human cancers.
Źródło:
Acta Biochimica Polonica; 2003, 50, 1; 231-238
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomonitoring Borów Dolnośląskich
Biomonitoring of the Bory Dolnoslaskie forest
Autorzy:
Jerz, D.
Rajfur, M.
Kłos, A.
Powiązania:
https://bibliotekanauki.pl/articles/125859.pdf
Data publikacji:
2012
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
biomonitoring
mchy Pleurozium schreberi
porosty Hypogymnia physodes
metale ciężkie
współczynnik porównawczy (CF)
moss Pleurozium schreberi
lichen Hypogymnia physodes
heavy metals
comparison factor (CF)
Opis:
Zbadano stężenia metali ciężkich: Zn, Ni i Cd zakumulowanych w porostach Hypogymnia physodes i w mchach Pleurozium schreberi, porastających kompleks leśny Borów Dolnośląskich. Stężenia metali oznaczano metodą absorpcyjnej spektometrii atomowej (AAS). Wyniki zinterpretowano za pomocą współczynników porównawczych (CF). Na ich podstawie wykazano, że na terenach leśnych położonych w kierunku północnym od miejscowości Węgliniec mogą być deponowane zanieczyszczenia, których źródłem jest emisja liniowa i obszarowa z tej miejscowości.
Concentrations of the following heavy metals was studied: Ni, Zn and Cd, which were accumulated in lichen Hypogymnia physodes and moss Pleurozium schreberi. The plants were growing in the Bory Dolnoslaskie (Lower Silesia Forest) area. Concentrations of the metals were determined with Atomic Absorption Spectrometry (AAS). The results were interpreted using the comparison factors (CF). The CF values demonstrated that in the forest areas located in the north direction from the town Wegliniec, pollutants can be deposited from the linear and surface emission sources, located in this town.
Źródło:
Proceedings of ECOpole; 2012, 6, 2; 738-741
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie anizotropii in situ w procesie selektywnego spiekania laserem proszków tworzyw PA12-CF
Study of in situ anisotropy in the selective laser sintering process of powder PA12-CF
Autorzy:
Zimniak, P.
Powiązania:
https://bibliotekanauki.pl/articles/95424.pdf
Data publikacji:
2016
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydawnictwo PB
Tematy:
selektywne spiekanie laserowe
tworzywo proszkowe PA12-CF
analiza obrazu
ukierunkowanie włókien
selective laser sintering (SLS)
powdered polymer PA12-CF
image analysis
fiber orientation
Opis:
W pracy omówiono podstawy laserowego, selektywnego spiekania proszkowego tworzywa polimerowego jako jednej z wiodących technologii przyrostowego wytwarzania modeli użytkowych i prototypów. Wadą techniki SLS jest zjawisko anizotropii, wynikające z mechanizmu nakładania kolejnych warstw za pomocą narzędzia rozprowadzającego tworzywo proszkowego, kompozytu na bazie poliamidu 12 z dodatkiem włókien węglowych PA12-CF, tj. klingi lub walca, co istotnie wpływa na właściwości mechaniczne uzyskanych wyrobów. W dalszej części pracy opisano unikatowe stanowisko badawcze do nakładania tworzywa proszkowego oraz zaproponowano odpowiednią metodę analizy obrazu, pomocną w zakresie wyznaczenia ukierunkowania włókien tworzywa proszkowego PA12-CF w ujęciu ilościowym i jakościowym.
The grounds of selective laser sintering (SLS) method, as one of the leading methods of rapid prototyping have been discussed in this paper. The greatest disadvantage of SLS method is anisotropy caused by mechanism of laying sequential layers using distributing tool for PA12-CF powder, i.e. a blade or a roller what may considerably influence the mechanical properties of the obtained products. Consequently this paper also describes the unique test stand for laying powdered polymer and presents the convenient method of image analysis which may help in checking behavior of reinforcing fibers in separate layers of PA12-CF polymer in the product regarding qualitative as well as quantitative aspects.
Źródło:
Postępy w Inżynierii Mechanicznej; 2016, 7(4); 33-45
2300-3383
Pojawia się w:
Postępy w Inżynierii Mechanicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semionotus cf. bergeri Agassiz from the Lias of the Holy Cross Mountains, Poland
Semionotus cf. bergeri Agassiz z liasu Gór Świętokrzyskich
Semionotus cf. bergeri Agassiz iz lejasa Sventokrzhiskikh Gor (Polsha)
Autorzy:
Maslankiewiczowa, Z.
Powiązania:
https://bibliotekanauki.pl/articles/20633.pdf
Data publikacji:
1965
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
paleontology
fish
Semionotus cf.bergeri
Lias
sediment
Holy Cross Mountains
Polska
Źródło:
Acta Palaeontologica Polonica; 1965, 10, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Analysis of Procedures and Solutions to Improve Energy Efficiency of Massive MIMO
Autorzy:
Phogat, Ritu Singh
Joshi, Rutvij
Powiązania:
https://bibliotekanauki.pl/articles/2200684.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
EE
Uplink-Downlink Transmission
power control
linear precoding
CF Massive MIMO
Opis:
The blustery growth of high data rate applications leads to more energy consumption in wireless networks to satisfy service quality. Therefore, energy-efficient communications have been paid more attention to limited energy resources and environmentally friendly transmission functioning. Countless publications are present in this domain which focuses on intensifying network energy efficiency for uplink-downlink transmission. It is done either by using linear precoding schemes, by amending the number of antennas per BS, by power control problem formulation, antenna selection schemes, level of hardware impairments, and by considering cell-free (CF) Massive-MIMO. After reviewing these techniques, still there are many barriers to implement them practically. The strategies mentioned in this review show the performance of EE under the schemes as raised above. The chief contribution of this work is the comparative study of how Massive MIMO EE performs under the background of different methods and architectures and the solutions to few problem formulations that affect the EE of network systems. This study will help choose the best criteria to improve EE of Massive MIMO while formulating a newer edition of testing standards. This survey provides the base for interested readers in energy efficient Massive MIMO.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 4; 677--686
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
“I Understood You, But There was This Pronunciation Thing…”: L2 Pronunciation Feedback in English/French Tandem Interactions
Autorzy:
Horgues, Céline
Scheuer, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/620808.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Tandem learning
L2 pronunciation
Corrective Feedback (CF)
French learners of English
Opis:
The role of corrective feedback (CF) in L2 development has been the topic of much discussion in SLA literature (see for example Sheen and Ellis 2011 for a recent overview). Researchers have focused their attention on CF provided either by language teachers or by fellow L2 learners, whereas relatively little is known about phonetic feedback offered in a non-institutional setting during peer-to-peer native/non-native interactions as is the case with tandem language learning. Tandem language exchanges represent a special learning environment, as each participant takes turns being the native and the non-native side of the dialogue. Thus, in contrast to the typical L2 learning setting, the hierarchical structure between the participants is fluid: the expert-novice power relationship evolves as the meeting progresses and the conversation switches from one language to the other. In order to see how the distinguishing characteristics of tandem learning (such as solidarity and reciprocity) shape the process of L2 phonetic development in their own specific ways, we collected an English-French Tandem Corpus as part of the SITAF project (Spécificités des Interactions verbales dans le cadre de Tandems linguistiques Anglais-Français), launched at the University of Sorbonne Nouvelle-Paris 3 in October 2012. We gathered linguistic data – both video and audio recorded – from face-to-face conversational exchanges held by 21 pairs of undergraduate students, with each ‘tandem’ consisting of a native speaker of English and a native speaker of French. The dialogues and reading passages were recorded on two occasions separated by a 3-month interval. The present paper offers a preliminary analysis of L2 pronunciation feedback on several renditions of the same text (The North Wind and the Sun), given to the French speakers by their English tandem partners. The passage was produced by each French participant three times: (1) during the ‘monitored’ reading, which was supervised by the English-speaking partner and which led to (2) the ‘second reading’ in the course of the first recording session, and then (3) the ‘final reading’ performed during the second recording session 3 months later. Data analysis will allow us to address the following questions relating to the study of phonetic corrective feedback: What is corrected by the native-speaking partner (henceforth NS)? Segmental or prosodic errors? Phonemic or allophonic deviations? What is the corrective strategy adopted by the NS? Is it explicit correction, recast, or elicitation? What is the learner’s uptake after receiving feedback? We hope that our data brings a valuable and fairly unique contribution to SLA research, helping to establish which errors get corrected and how it may have implications for setting priorities in L2 pronunciation teaching.
Źródło:
Research in Language; 2014, 12, 2; 145-161
1731-7533
Pojawia się w:
Research in Language
Dostawca treści:
Biblioteka Nauki
Artykuł
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