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Wyszukujesz frazę "Parity" wg kryterium: Temat


Wyświetlanie 1-7 z 7
Tytuł:
Preterm discharge effects: Relationship between the maternal experience and newborn’s psychobiological regulation
Autorzy:
Sparano, Ausilia
Nieznanska, Agnieszka A.
De Berardinis, Daniela
Panetta, Valentina
Ferri, Rosa
Agostino, Rocco
Powiązania:
https://bibliotekanauki.pl/articles/430252.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
preterm
parity of mother
self-regulation
cognitive development
Opis:
The purpose of this study is to investigate how the past experiences of mothers and their potentially traumatic events during pregnancy may have influenced the processes of psychobiological self-regulation and cognitive development in a child born preterm. Eighty children who had a gestational age of < 32 weeks were examined at the 9th month of the corrected age. The mothers and children were divided in two groups: multipara mothers and their children and the primipara mothers and their children. These children were examined on the basis of sleep disorders, nutritional problems and mental development. Perinatal data from clinical observations and data from standardized developmental tests (BSID, II ed.) were used to describe the differences. The children of primipara mothers who had unexpected preterm delivery presented major incidences of sleep disorders while the children of primipara mothers, who programmed preterm delivery, presented a major incidences of nutrition problems. The predictability of preterm delivery has a major influence on the capacity of newborns for self-regulation in the case of primipara mothers.
Źródło:
Polish Psychological Bulletin; 2011, 42, 2; 81-85
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deviations from Triangular Arbitrage Parity in Foreign Exchange and Bitcoin Markets
Autorzy:
Reynolds, Julia
Sögner, Leopold
Wagner, Martin
Powiązania:
https://bibliotekanauki.pl/articles/2075371.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
triangular arbitrage parity
foreign exchange markets
cryptocurrencies
cointegration
monitoring
Opis:
This paper applies recently developed procedures to monitor and date so-called “financial market dislocations”, defined as periods in which substantial deviations from arbitrage parities take place. In particular, we use a cointegration perspective to focus on deviations from the triangular arbitrage parity for exchange rate triplets. Due to increasing attention on and importance of mispricing in the market for cryptocurrencies, we include the cryptocurrency Bitcoin in addition to fiat currencies in our analysis. We do not find evidence for substantial deviations from the triangular arbitrage parity when only traditional fiat currencies are considered, but document significant deviations from triangular arbitrage parities in the newer market for Bitcoin. We tentatively confirm the importance of our results for portfolio strategies by showing that a currency portfolio that trades based on our detected break-points outperforms a simple buy-and-hold strategy.
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2021, 2; 105-146
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Purchasing Power Parity Puzzle and Imperfect Knowledge: The Case of the Polish Zloty
Autorzy:
Kelm, Robert
Powiązania:
https://bibliotekanauki.pl/articles/2076449.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
purchasing power parity
expectations
econometric modelling
cointegration
transition economies
Nauki Humanistyczne i Społeczne
Opis:
A review of the contemporary mainstream literature on exchange rate modelling clearly indicates that the rational expectations hypothesis (RE) is almost invariably taken as a point of reference in empirical investigations. This paper tests the RE hypothesis for the Polish foreign exchange market within the Roman Frydman and Michael Goldberg model that builds on the hypothesis of imperfect knowledge economics (IKE). The employed modelling strategy consists in the formulation of assumptions about the persistence of nominal rate, prices and interest rates and of the verification of competing scenarios congruent with RE and IKE. As a result of the analysis, the RE hypothesis is rejected in favour of the IKE alternative
Źródło:
Central European Journal of Economic Modelling and Econometrics; 2017, 1; 1-27
2080-0886
2080-119X
Pojawia się w:
Central European Journal of Economic Modelling and Econometrics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimizing the Bit-flipping Method for Decoding Low-density Parity-check Codes in Wireless Networks by Using the Artificial Spider Algorithm
Autorzy:
Ghaffoori, Ali Jasim
Abdul-Adheem, Wameedh Riyadh
Powiązania:
https://bibliotekanauki.pl/articles/2055251.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
low-density parity-check
LDPC
hard-decision Bit-Flipping
BF
particle swarm optimization
PSO
artificial spider algorithm
ASA
Opis:
In this paper, the performance of Low-Density Parity-Check (LDPC) codes is improved, which leads to reduce the complexity of hard-decision Bit-Flipping (BF) decoding by utilizing the Artificial Spider Algorithm (ASA). The ASA is used to solve the optimization problem of decoding thresholds. Two decoding thresholds are used to flip multiple bits in each round of iteration to reduce the probability of errors and accelerate decoding convergence speed while improving decoding performance. These errors occur every time the bits are flipped. Then, the BF algorithm with a low-complexity optimizer only requires real number operations before iteration and logical operations in each iteration. The ASA is better than the optimized decoding scheme that uses the Particle Swarm Optimization (PSO) algorithm. The proposed scheme can improve the performance of wireless network applications with good proficiency and results. Simulation results show that the ASA-based algorithm for solving highly nonlinear unconstrained problems exhibits fast decoding convergence speed and excellent decoding performance. Thus, it is suitable for applications in broadband wireless networks.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 1; 109--114
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gestational length in Carthusian broodmares: effect of breeding season, foal gender, age of mare, year of parturition, parity and sire
Autorzy:
Satue, K.
Felipe, M.
Mota, J.
Munoz, A.
Powiązania:
https://bibliotekanauki.pl/articles/31208.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gestational length
broodmare
breeding season
foal gender
foal sex
animal age
age
mare
parturition
parity
sire
Carthusian horse
Opis:
The length of gestation in Carthusian broodmares was calculated on the basis of 339 spontaneous full-term deliveries taking place in the 8-year period 1998-2005 from 158 broodmares and 29 stallions in a major farm of Spanish horses of Carthusian strain in southern Spain. Ultrasonography was used to determine follicular dehiscence, 1st day of pregnancy and to confirm conception in mares. Mean GL was 332.4 ± 12.1 days, and a normal interval of 297-358 days was established for this breed. GL records were grouped on the basis of foal sex (colts or fillies), mating month (between November and January; February and April; May and July), age of the mare (4 to 7 years; 8 to 12 years; 13 to 17 years), breeding year, stallion and parity (primiparous vs. multiparous). GLs were 12.9 days shorter in mares mated between May and July than those mated between November and January and 15.3 days in mares mated between February and April (p<0.001). Mares aged between 8-12 years had 5.3 days shorter GLs than those aged between 13-17 years (p<0.05). Pregnancy was significantly 5.7 days longer when the mare gave birth to colts than fillies (p<0.05). GL was 14.5 days longer in primiparous than in multiparous mares (p<0.001). No statistical differences in GL were found between the studied years. This study shows the influence of certain stallion on GL.
Źródło:
Polish Journal of Veterinary Sciences; 2011, 14, 2
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wokół koncepcji demokracji. Parytet płci w świetle polskiego dyskursu prasowego
Conceptualising Democracy? Constructions of Gender Parity in Polish Press Discourse
Autorzy:
Krzyżanowska, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/427458.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gender parity
representation of women
democracy
media discourse
critical discourse analysis
parytet płci
reprezentacja kobiet
demokracja
dyskurs medialny
Krytyczna Analiza Dyskursu
Opis:
This article analyses Polish media discourse about gender parity by arguing that the latter is not only a call for the increased participation of women in Polish public life but also a reason for the discursive redefinition of different visions of Polish democracy. The analysis focuses on a period between the first and second Polish Women’s Congress (2009–2010) when the idea of gender parity – and, later on, of the related official legal acts – became one of the central elements of Polish public debates. Anchored in the Discourse-Historical Approach in critical discourse analysis (CDA), the qualitative discourse analysis focuses on the constructions of arguments against gender parity in selected articles from key Polish broadsheet newspapers. The systematic analysis of those arguments allows establishing that gender is, in fact, treated as a decisive factor for one’s participation in the Polish public life. By the same token, the article explicates that media-based perceptions of parity as vital or marginal are directly related to broader definitions of gender as either social/cultural or biological. These, as the article shows, influence relevant conceptions of democracy and constructions of its key principles in acts of either discursively supporting or rejecting gender parity.
Artykuł skupia się na analizie dyskursu medialnego o parytecie płci jako kwestii, która odnosi się zarówno do sposobów zwiększenia udziału kobiet w sprawowaniu władzy oraz, szerzej, do polskiej wizji demokracji. Analiza obejmuje okres między pierwszym a drugim Kongresem Kobiet Polskich (2009–2010), kiedy idea parytetu (bądź rozwiązań kwotowych) została nagłośniona w polskim życiu publicznym oraz w – będącym jego częścią – dyskursie medialnym. Podstawą jakościowej analizy, przeprowadzonej zgodnie z założeniami podejścia dyskursywno-historycznego w krytycznej analizie dyskursu (KAD), są wybrane publikacje prasowe, w których zostały zrekonstruowane aporie wysuwane przez przeciwników paryte- tu płci. Systematyczna analiza argumentów przeciw parytetowi płci w dyskursie medialnym uwidacznia nie tylko to, że płeć może decydować o wymaganiach stawianych różnym uczestnikom sfery publicznej, ale też fakt, że postrzeganie ważności lub nieważności kategorii płci w kontekście problematyki związanej z demokracją w Polsce powiązane jest ze sposobem, w jaki płeć jest definiowana (np. jako atrybut jednostki proweniencji społecznej lub kultu- rowej czy biologicznej). Jednocześnie dyskursywnie konstruowany sposób rozumienia płci może wpływać zarówno na to, jak rozumie się demokrację oraz czy akceptuje się lub odrzuca ideę parytetu, jako jej przejaw.
Źródło:
Studia Socjologiczne; 2012, 1(204); 199-223
0039-3371
Pojawia się w:
Studia Socjologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The design of structured LDPC codes with algorithmic graph construction
Autorzy:
Sułek, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2173691.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
channel coding
low density parity check code
LDPC
nonbinary code
quasi-cyclic code
kodowanie kanałowe
kodowanie niebinarne
kodowanie quasi-cykliczne
kodowanie korekcyjne
Opis:
Low-Density Parity-Check (LDPC) codes are among the most effective modern error-correcting codes due to their excellent correction performance and highly parallel decoding scheme. Moreover, the nonbinary extension of such codes further increases performance in the short-block regime. In this paper, we review the key elements for the construction of implementation-oriented binary and nonbinary codes. These Quasi-Cyclic LDPC (QC-LDPC) codes additionally feature efficient encoder and decoder implementation frameworks. We then present a versatile algorithm for the construction of both binary and nonbinary QC-LDPC codes that have low encoding complexity and an optimized corresponding graph structure. Our algorithm uses a progressive edge growth algorithm, modified for QC-LDPC graph construction, and then performs an iterative global search for optimized cyclic shift values within the QC-LDPC circulants. Strong error correction performance is achieved by minimizing the number of short cycles, and cycles with low external connectivity, within the code graph. We validate this approach via error rate simulations of a transmission system model featuring an LDPC coder-decoder, digital modulation, and additive white Gaussian noise channels. The obtained numerical results validate the effectiveness of the proposed construction algorithm, with a number of constructed codes exhibiting either similar or superior performance to industry standard binary codes and selected nonbinary codes from the literature.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e141592
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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