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Wyświetlanie 1-50 z 1552
Tytuł:
Stochastic viability and a comparison theorem
Autorzy:
Milian, Anna
Powiązania:
https://bibliotekanauki.pl/articles/967108.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Opis:
We give explicit necessary and sufficient conditions for the viability of polyhedrons with respect to Itô equations. Using the viability criterion we obtain a comparison theorem for multi-dimensional Itô processes
Źródło:
Colloquium Mathematicum; 1995, 68, 2; 297-316
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of some weighted sieves
Autorzy:
Greaves, G.
Powiązania:
https://bibliotekanauki.pl/articles/719860.pdf
Data publikacji:
1985
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Źródło:
Banach Center Publications; 1985, 17, 1; 143-153
0137-6934
Pojawia się w:
Banach Center Publications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of two notions of porosity
Autorzy:
Strobin, Filip
Powiązania:
https://bibliotekanauki.pl/articles/745819.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
porosity
ball smallness
normed linear space
Opis:
In the paper we compare two notions of porosity: the R-ball porosity \((R \rt 0)\) defined by Preiss and Zajı́ček, and the porosity which was introduced by Olevskii (here it will be called the O-porosity). We find this comparison interesting since in the literature there are two similar results concerning these two notions. We restrict our discussion to normed linear spaces since the R-ball porosity was originally defined in such spaces.
Źródło:
Commentationes Mathematicae; 2008, 48, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of some conditional functional equations
Autorzy:
Chmieliński, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/746394.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Conditional functional equations
isometries
additive functions
Wigner equation
Opis:
For real inner product spaces we consider and compare the classes of mappings satisfying some conditional and unconditional functional equations.
Źródło:
Commentationes Mathematicae; 2005, 45, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Income tax: a comparison of the forecasting methodologies
Autorzy:
Pavlik, Martin
Powiązania:
https://bibliotekanauki.pl/articles/425078.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
income tax
forecasting
ARCH models
GARCH models
EGARCH models
Akaike information criteria
Opis:
The author focuses on income tax forecasting. He compares the different forecasting methodologies. He also compares his solution to the official annual forecasts in the Slovak Republic. He chose the quarters of years as the time units.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 3(41); 104-112
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison between profile and areal surface roughness parameters
Autorzy:
He, Baofeng
Ding, Siyuan
Shi, Zhaoyao
Powiązania:
https://bibliotekanauki.pl/articles/1849053.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
profile surface roughness
areal surface roughness
filtration techniques
evaluation parameters
Opis:
Surface roughness has an important influence on the service performance and life of parts. Areal surface roughness has the advantage of accurately and comprehensively characterizing surface microtopography. Understanding the relationship and distinction between profile and areal surface roughness is conducive to deepening the study of areal surface roughness and improving its application. In this paper, the concepts, development, and applications of surface roughness in the profile and the areal are summarized from the aspect of evaluation parameters. The relationships and differences between surface roughness in the profile and the areal are analyzed for each aspect, and future development trends are identified.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 413-438
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison between profile and areal surface roughness parameters
Autorzy:
He, Baofeng
Ding, Siyuan
Shi, Zhaoyao
Powiązania:
https://bibliotekanauki.pl/articles/1849106.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
profile surface roughness
areal surface roughness
filtration techniques
evaluation parameters
Opis:
Surface roughness has an important influence on the service performance and life of parts. Areal surface roughness has the advantage of accurately and comprehensively characterizing surface microtopography. Understanding the relationship and distinction between profile and areal surface roughness is conducive to deepening the study of areal surface roughness and improving its application. In this paper, the concepts, development, and applications of surface roughness in the profile and the areal are summarized from the aspect of evaluation parameters. The relationships and differences between surface roughness in the profile and the areal are analyzed for each aspect, and future development trends are identified.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 413-438
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of hole-filling methods in 3D
Autorzy:
Pérez, E.
Salamanca, S.
Merchán, P.
Adán, A.
Powiązania:
https://bibliotekanauki.pl/articles/331035.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
3D polygonal model
repairing meshes
hole filling
restoration algorithm
model wielokątny 3D
renowacja siatki
algorytm renowacji
Opis:
This paper presents a review of the most relevant current techniques that deal with hole-filling in 3D models. Contrary to earlier reports, which approach mesh repairing in a sparse and global manner, the objective of this review is twofold. First, a specific and comprehensive review of hole-filling techniques (as a relevant part in the field of mesh repairing) is carried out. We present a brief summary of each technique with attention paid to its algorithmic essence, main contributions and limitations. Second, a solid comparison between 34 methods is established. To do this, we define 19 possible meaningful features and properties that can be found in a generic hole-filling process. Then, we use these features to assess the virtues and deficiencies of the method and to build comparative tables. The purpose of this review is to make a comparative hole-filling state-of-the-art available to researchers, showing pros and cons in a common framework.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2016, 26, 4; 885-903
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of numerical solutions of dead reckoning navigation
Autorzy:
Banachowicz, A.
Wolski, A.
Powiązania:
https://bibliotekanauki.pl/articles/225181.pdf
Data publikacji:
2012
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
pomiary nawigacyjne
metody numeryczne
navigation measurements
numerical methods
Opis:
Calculations of position coordinates in dead reckoning navigation essentially comes down to the integration of ship movements assuming an initial condition (position) of the ship. This corresponds to Cauchy’s problem. However, in this case the ship’s velocity vector as a derivative of its track (trajectory) is not a given function, but comes from navigational measurements performed in discrete time instants. Due to the discrete character of velocity vector or acceleration measurements, ship’s movement equations particularly qualify for numerical calculations. In this, case the equation nodes are the time instants of measurements and navigational parameter values read out at those instants. This article presents the applications of numerical integration of differential equations (movement) for measurements of velocity vectors and acceleration vector (inertial navigation systems). The considerations are illustrated with navigational measurements recorded during sea trials of the rescue ship integrated system.
Źródło:
Reports on Geodesy; 2012, z. 2/93; 49-55
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of two systems of point-free topology
Autorzy:
Gruszczyński, Rafał
Pietruszczak, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/749986.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
point-free topology
region-based topology
foundations of topology
mereology
mereological structures
separation structures
connection structures
Grzegorczyk structures
Biacino-Gerla structures.
Opis:
This is a spin-off paper to [3, 4] in which we carried out an extensive analysis of Andrzej Grzegorczyk’s point-free topology from [5]. In [1] Loredana Biacino and Giangiacomo Gerla presented an axiomatization which was inspired by the Grzegorczyk’s system, and which is its variation. Our aim is to compare the two approaches and show that they are slightly different. Except for pointing to dissimilarities, we also demonstrate that the theories coincide (in the sense that their axioms are satisfied in the same class of structures) in presence of axiom stipulating non-existence of atoms.
Źródło:
Bulletin of the Section of Logic; 2018, 47, 3
0138-0680
2449-836X
Pojawia się w:
Bulletin of the Section of Logic
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of algorithms for separation of synchronous subspaces
Autorzy:
Almeida, M.
Bioucas-Dias, J.
Vigário, R.
Oja, E.
Powiązania:
https://bibliotekanauki.pl/articles/201566.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
phase locking
synchrony
source separation
subspaces
Independent Component Analysis (ICA)
Independent Subspace Analysis (ISA)
magnetoencephalogram (MEG)
Opis:
Independent Subspace Analysis (ISA) consists in separating sets (subspaces) of dependent sources, with different sets being independent of each other. While a few algorithms have been proposed to solve this problem, they are all completely general in the sense that they do not make any assumptions on the intra-subspace dependency. In this paper, we address the ISA problem in the specific context of Separation of Synchronous Sources (SSS), i.e., we aim to solve the ISA problem when the intra-subspace dependency is known to be perfect phase synchrony between all sources in that subspace. We compare multiple algorithmic solutions for this problem, by analyzing their performance on an MEG-like dataset.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 455-460
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Different Estimation Methods for Hysteresis Modelling
Autorzy:
Jastrzębski, R.
Chwastek, K.
Biondić, I.
Miličević, K.
Powiązania:
https://bibliotekanauki.pl/articles/1030241.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.-d
75.60.Ej
Opis:
The paper focuses on the estimation techniques for a low-dimensional phenomenological model of ferromagnetic hysteresis proposed by the Brazilian research group GRUCAD. The description is expressed with an ordinary differential equation and some auxiliary relationships. It describes both irreversible and reversible magnetization processes and addresses some problems inherent in the well-known Jiles-Atherton model. It is found that the differential evolution method is the most competitive technique for recovery of optimal model parameters.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1228-1231
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison between profile and areal surface roughness parameters
Autorzy:
He, Baofeng
Ding, Siyuan
Shi, Zhaoyao
Powiązania:
https://bibliotekanauki.pl/articles/1849009.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
profile surface roughness
areal surface roughness
filtration techniques
evaluation parameters
Opis:
Surface roughness has an important influence on the service performance and life of parts. Areal surface roughness has the advantage of accurately and comprehensively characterizing surface microtopography. Understanding the relationship and distinction between profile and areal surface roughness is conducive to deepening the study of areal surface roughness and improving its application. In this paper, the concepts, development, and applications of surface roughness in the profile and the areal are summarized from the aspect of evaluation parameters. The relationships and differences between surface roughness in the profile and the areal are analyzed for each aspect, and future development trends are identified.
Źródło:
Metrology and Measurement Systems; 2021, 28, 3; 413-438
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forecasting industrial production in Poland – a comparison of different methods
Autorzy:
Acedański, Jan
Powiązania:
https://bibliotekanauki.pl/articles/425092.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
forecasting
industrial production
leading indicators
factor models
Opis:
In this paper we compared the accuracy of a few forecasting methods of the industrial production index in Poland. Naïve forecasts, simple autoregressive models, leading indicator models, factor models as well as joint models were included in the considerations. We used the out-of-sample RMSE and CPA tests as the main measures of the predictions accuracy. We found that three models provided the best predictions in most cases – the models with the PMI index and with the PMI and German IFO indexes as leading indicators as well as joint forecasts.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 1(39); 40-51
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marketing-type and recruitment advertising: a comparison of two genres
Autorzy:
Łącka-Badura, Jolanta
Powiązania:
https://bibliotekanauki.pl/articles/2049952.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The present paper aims to discuss recruitment advertising as a promotional genre, as well as to investigate its rhetorical structure and provide a tentative comparison between job ads and the central promotional genre, i.e. marketing-type (or ‘mainstream’) advertising. Based on an analysis of a corpus comprising 400 online job advertisements, the study discusses the communicative purposes of the genre (juxtaposed with the general goals of promotional genres), and attempts to identify and describe the prevalent structural patterns found in the sample. It also offers a rough comparison between job ads and prototypical/marketing-type advertisements in terms of the rhetorical structure and other defining characteristics, following Bhatia (2004, 2005) and Cook (2001). The analysis confi rms numerous similarities between job advertising and the central promotional genre, yet it also identifies major differences, particularly those pertaining to the communicative goals, structural elements (company identifi cation, targeting the market, justifying the ‘product’, offering benefits/incentives, making use of testimonials and pressure tactics), as well as other signifi cant features including the level of ‘artistry’, the number of voices involved, generic stability, provoking controversy, being parasitic upon other genres, occupying the space at the centre/periphery of attention.
Źródło:
Linguistica Silesiana; 2015, 36; 275-294
0208-4228
Pojawia się w:
Linguistica Silesiana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of two enzymatic methods of clinical dextran production
Autorzy:
Sikora, B.
Kubik, C.
Bielecki, S.
Powiązania:
https://bibliotekanauki.pl/articles/410412.pdf
Data publikacji:
2017
Wydawca:
Politechnika Łódzka. Wydawnictwo Politechniki Łódzkiej
Tematy:
dextransucrase
dextranase
acceptor dextrans
clinical dextran
dekstranosacharaza
dekstranaza
dekstran kliniczny
Opis:
The aim of this study was to evaluate and compare of the two enzymatic methods of clinical dextran production were compared. The reactions were performed at 30°C and pH 5.4 in solutions containing different amounts of sucrose, using dextransucrase (DS, in the presence of dextranase (D) (method 1) or acceptor dextrans (method 2). The activity of Leuconostoc mesenteroides L dextransucrase (DS), which converts sucrose to dextran, was 0.4 U ml-1 in both the methods. As much as 53-56% of clinical dextran fractions were obtained for 28 h from 10% sucrose solutions, which contained 1.5% or 2.5% acceptor dextrans with molecular mass of 10 and 15 kDa, respectively. Approximately 50% of these fractions was obtained (also in 28 h) from 10% sucrose solutions by using 0.004 U ml-1 of DN, added to reaction mixtures 5 h later than our experiments indicate that the clinical dextran can be efficiently produced by using both the compared methods, which employ either acceptor dextrans with definite molecular mass, or the dextranase. Because consumption of the latter enzyme is rather small, and it is easily available, thus this method should be attractive for clinical dextran manufacturers.
Źródło:
Biotechnology and Food Science; 2017, 81, 2; 125-136
2084-0136
2299-6818
Pojawia się w:
Biotechnology and Food Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of SMT-solvers for timed weighted interpreted systems
Autorzy:
Zbrzezny, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/122082.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
SMT
model (BMC)
system wieloagentowy (MAS)
multi-agent (MAS)
Opis:
We compare four SMT-solvers for the same SMT-based bounded model checking algorithm for multi-agent systems modelled by timed weighted interpreted systems and for properties expressed in the existential fragment of epistemic weighted linear-time temporal logic (WELTLK). To this end, we use the timed weighted generic pipeline paradigm (TWGPP) and the timed weighted train controller system (TWTCS). We consider several properties of the problems that can be expressed in WELTLK, and we present the performance evaluation of the mentioned bounded model checking method using four different SMT-solvers: Z3, Yices, CVC4 and Mathsat, by means of the running time and the memory used.
Źródło:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2016, 21; 189-206
2450-9302
Pojawia się w:
Scientific Issues of Jan Długosz University in Częstochowa. Mathematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Higher Education System between China and Ukraine
Autorzy:
Shatska, Oksana
Powiązania:
https://bibliotekanauki.pl/articles/644764.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
higher education
degree system
studying process
China
Ukraine
Opis:
This article compares the higher education systems between China and Ukraine, discusses some important peculiarities of the two, and points out the differences between the two. The purpose is to help us get a better understanding of the two countries’ higher education systems and to improve the educational exchange and collaboration of the two countries. Special attention is paid to structures of two universities, their facilities, rules of admission, the organization of studying process and some approaches, and levels of acknowledgements by governments which show us the differences and similarities between the two.
Źródło:
Kultura-Społeczeństwo-Edukacja; 2014, 6, 2; 9-22
2300-0422
Pojawia się w:
Kultura-Społeczeństwo-Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Small Area and Calibration Estimators via Simulation
Autorzy:
Hidiroglou, Michael A.
Estevao, Victor M.
Powiązania:
https://bibliotekanauki.pl/articles/465930.pdf
Data publikacji:
2016
Wydawca:
Główny Urząd Statystyczny
Tematy:
area level
unit level
calibration estimates
small area estimates
simulation
Opis:
Domain estimates are typically obtained using calibration estimators that are direct or modified direct. They are direct if they strictly use data within the domain of interest. They are modified direct if they use both data within and outside the domain of interest. An alternative way of producing these estimates is through small area procedures. In this article, we compare the performance of these two approaches via a simulation. The population is generated using a hierarchical model that includes both area effects and unit level random errors. The population is made up of mutually exclusive domains of different sizes, ranging from a small number of units to a large number of units. We select many independent simple random samples of fixed size from the population and compute various estimates for each sample using the available auxiliary information. The estimates computed for the simulation included the Horvitz-Thompson estimator, the synthetic estimator (indirect estimate), calibration estimators, and unit level based estimators (small area estimate). The performance of these estimators is summarized based on their design- based properties
Źródło:
Statistics in Transition new series; 2016, 17, 1; 133-154
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Discrete and Continuous Analysis of Positron Lifetime Spectra: a Comparison
Autorzy:
Consolati, G.
Quasso, F.
Powiązania:
https://bibliotekanauki.pl/articles/2007998.pdf
Data publikacji:
1999-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
36.10.Dr
71.60.+z
78.70.Bj
Opis:
Positron lifetime spectra in poly[1-(trimethylsilyl)]propine membranes were collected at different temperatures and various number of accumulated counts, in order to compare the results from analyses obtained by different decay models: discrete (that is, purely exponential) or continuous (with at least one distribution of lifetimes). Analysis into four discrete components is inadequate, unless a low number of counts (1 to 2 millions) is accumulated. Conversely, deconvolutions which allow the ortho-positronium lifetime to be distributed give satisfactory fits, even at the highest statistics (60 millions). An equivalent good fit in terms of χ$\text{}^{2}$ test is obtained with a five discrete components analysis, from which it is possible to extract information on the first moments (centroid and standard deviation) of ortho -positronium lifetime distribution.
Źródło:
Acta Physica Polonica A; 1999, 95, 4; 505-508
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bandwidth Trading: A Comparison of the Combinatorial and Multicommodity Approach
Autorzy:
Kołtyś, K.
Pałka, P.
Toczyłowski, E.
Żółtowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/309152.pdf
Data publikacji:
2010
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
bandwidth allocation
combinatorial auction
computational efficiency
ndivisible resources
multicommodity trade
Opis:
Since the telecommunication market becomes more complex and dynamic, a strong need for a new, efficient and flexible bandwidth trading mechanisms appears. We believe that good mechanisms, that allow effective and fair allocation of bandwidth between market participants will help to develop the real competitive bandwidth market. In this paper we compare two different double-sided bandwidth auction mechanisms, that seem to be well suited approaches for trading indivisible units of bandwidth: combinatorial auction c-SeBiDA and multicommodity mechanism BACBR-I. The c-SeBiDA mechanism considers two types of commodities: inter-node links and paths consisting of particular links. Market participants may bid a single link, or a bundle of links, constituting a specific path. The BACBR-I mechanism is a multicommodity exchange model, that allows bidders to place buy offers not only for individual or bundled links, but rather for end-to-end connections. Therefore, it is the decision model that allocates the most efficient links to connections. We run a large set of experiments to test the allocation and computational efficiency obtained under both approaches.
Źródło:
Journal of Telecommunications and Information Technology; 2010, 2; 67-72
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Alternative investments during turbulent times - a comparison of dynamic relationships
Autorzy:
Siemaszkiewicz, Karolina
Powiązania:
https://bibliotekanauki.pl/articles/2176611.pdf
Data publikacji:
2023-02-28
Wydawca:
Główny Urząd Statystyczny
Tematy:
safe haven instruments
gold
silver
Bitcoin
dynamic correlation
global financial crisis
eurozone debt crisis
COVID-19 pandemic
Opis:
The COVID-19 pandemic, like the Russian aggression against Ukraine, had a significant impact on many financial markets and asset prices. The latter additionally led to large fluctuations on financial markets. In our paper, we try to compare the performance of 'safe haven' assets during turbulent times, such as the recent global financial crisis, the eurozone debt crisis, the COVID-19 pandemic and the Russian aggression against Ukraine. We investigate the dynamic relationship between indices from several European countries (Czech Republic, France, Germany, Great Britain, Poland, Slovakia and Spain), and popular financial instruments (gold, silver, Brent and WTI crude oil, US dollar, Swiss franc and Bitcoin). The study further estimates the parameters of DCC or CCC models to compare dynamic relationships between the above-mentioned stock markets and financial instruments. The results demonstrate that in most cases, the US dollar and Swiss franc were able to protect investors from stock market losses during turbulent times. In addition, investors from France, Poland, the Czech Republic and Slovakia saw gold as a 'safe haven' asset throughout all the abovementioned crises. Our findings are in line with other literature which points out that 'safe haven' instruments can change over time and across countries. In the literature, we can find research performed for the USA, China, Canada, and Great Britain, but there is no such research for Poland, France, the Czech Republic or Slovakia. The purpose of this paper is to try to fill this research gap.
Źródło:
Przegląd Statystyczny; 2022, 69, 3; 23-43
0033-2372
Pojawia się w:
Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Small Area Estimation Methods for Poverty Mapping
Autorzy:
Guadarrama, María
Molina, Isabel
Rao, J. N. K.
Powiązania:
https://bibliotekanauki.pl/articles/465671.pdf
Data publikacji:
2016
Wydawca:
Główny Urząd Statystyczny
Tematy:
area level model
non-linear parameters
empirical best estimator
hierarchical Bayes
poverty mapping
unit level models
Opis:
We review main small area estimation methods for the estimation of general nonlinear parameters focusing on FGT family of poverty indicators introduced by Foster, Greer and Thorbecke (1984). In particular, we consider direct estimation, the Fay-Herriot area level model (Fay and Herriot, 1979), the method of Elbers, Lanjouw and Lanjouw (2003) used by the World Bank, the empirical Best/Bayes (EB) method of Molina and Rao (2010) and its extension, the Census EB, and finally the hierarchical Bayes proposal of Molina, Nandram and Rao (2014). We put ourselves in the point of view of a practitioner and discuss, as objectively as possible, the benefits and drawbacks of each method, illustrating some of them through simulation studies.
Źródło:
Statistics in Transition new series; 2016, 17, 1; 41-66
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Selected Aspects of Finnish and Polish Public Libraries
Autorzy:
Antczak, Mariola
Powiązania:
https://bibliotekanauki.pl/articles/1164255.pdf
Data publikacji:
2014-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Opis:
The article presents and compares the general situation of public libraries and readership in Finland and Poland at the beginning of the 21st century, based on selected statistical data on the topic. In order to correctly understand the library policy of Finland - a country in which it is impossible to implement cultural policy without taking into account the geographical and natural conditions of individual regions - the most important data on the country are presented and compared with data on Poland.Statistical schedules, online reports on the activity of public libraries, libraries’ homepages, legislative acts and professional library science magazines, among others, served as source materials for the conducted analysis. The comparative method, documentation analysis method and statistical method were used to achieve the assumed objectives.Considering the limitations on the article size, a decision was made to select a few specific aspects of the topic for analysis - the most important ones in the author’s opinion. Among others, these included information on public libraries made available in both countries, contemporary government policies implemented towards the institutions that the author is interested in, conducting qualitative and quantitative research, generating reports on the research, as well as the governments’ compliance with international and national standards of the quality of library collections, personnel and services.
Źródło:
Folia Scandinavica Posnaniensia; 2014, 16
1230-4786
2299-6885
Pojawia się w:
Folia Scandinavica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of methods solving repeatable inverse kinematics for robot manipulators
Autorzy:
Duleba, I.
Karcz-Duleba, I.
Powiązania:
https://bibliotekanauki.pl/articles/229288.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
manipulator
inverse kinematics
repeatability
optimization
algorithms
Opis:
In this paper two recent methods of solving a repeatable inverse kinematic task are compared. The methods differ substantially although both are rooted in optimization techniques. The first one is based on a paradigm of continuation methods while the second one takes advantage of consecutive approximations. The methods are compared based on a quality of provided results and other quantitative and qualitative factors. In order to get a statistically valuable comparison, some data are collected from simulations performed on pendula robots with different paths to follow, initial configurations and a degree of redundancy.
Źródło:
Archives of Control Sciences; 2018, 28, 1; 5-18
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fluxes and Structures: Which Relational Gaze? A Comparison between Relational Sociologies
Autorzy:
Donati, Pierpaolo
Powiązania:
https://bibliotekanauki.pl/articles/1790391.pdf
Data publikacji:
2020-06-24
Wydawca:
Polskie Towarzystwo Socjologiczne
Tematy:
relational gaze
critical realism
social constructivism
relational sociology
relational reflexivity
Opis:
Many scholars today share a view of relational sociology as a processual-transactional approach whose basic tenet is the fluid, relativistic, contingent, transactional character of social relations. They invite sociologists to see our so-called objects (societies, institutions, social patterns, conflicts, social movements, social classes, etc.) in a processual way. In this contribution the author objects that relationalism offers a reductive vision of social reality, because it supports a flat social ontology rather than a stratified social ontology. Relationalism reduces relationships to pure flows, considering structures as purely contingent, while relational sociology attributes a structure to relationships and gives autonomy to structures, even if they are produced by processes. We have to distinguish between different orders of reality: the processual-interactional (relationalist) and the relational orders. To see all of this, it is necessary to assume a relational gaze that is only possible if a supra-functional, morphogenetic framework is adopted.
Źródło:
Polish Sociological Review; 2020, 210, 2; 179-198
1231-1413
2657-4276
Pojawia się w:
Polish Sociological Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Two Methods of Determining Thermal Properties of Footwear
Autorzy:
Kuklane, K.
Holmer, I.
Afanasieva, R.
Powiązania:
https://bibliotekanauki.pl/articles/90826.pdf
Data publikacji:
1999
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
standard
thermal insulation
footwear
thermal foot model
stopy
obuwie
izolacja cieplna
Opis:
The present European Standard for footwear testing (Standard No. EN 344:1992; European Committee for Standardization [CEN], 1992) classifies footwear thermally by a temperature drop inside the footwear during 30 min at defined conditions. Today, other methods for footwear thermal testing are also available. The aim of this study was to compare EN 344:1992 with a thermal foot method. Six boots were tested according to both methods. Additional tests with modified standard tests were also carried out. The methods ranked the footwear in a similar way. However, the test according to standard EN 344:1992 is a pass-or-fail test, whereas data that is gained from the thermal foot method gives more information and allows further use in research and product development. A change of the present standard method is suggested.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1999, 5, 4; 477-484
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Data Traffic in Standardized Personal Health Monitoring Solutions
Autorzy:
Schuler, A.
Franz, B.
Krauss, O.
Powiązania:
https://bibliotekanauki.pl/articles/227023.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fast healthcare interoperability resources
integrating the healthcare enterprise
continua health alliance
telemonitoring
electronic health record
SOAP
representational state transfer
m-health
e-health
Opis:
The publication of the HL7-FHIR standard offers new possibilities for integrated applications in healthcare. Although trial implementations have only recently started, the application of FHIR in context of a Personal Health Monitoring solution is worth investigating. Most of the existing telemonitoring solutions in healthcare rely on guidelines defined by the Continua Health Alliance (CHA). This paper compares the requirements of CHA and HL7-FHIR with respect to data traffic between client devices and server side applications. Therefore an existing CHA-compliant telemonitoring solution is extended towards supporting HL7-FHIR. Both approaches were simultaneously evaluated in a live system with 68 participants. The results of the evaluation show that the FHIR approach offers the possibility of reducing data traffic in comparison to the CHA solution.
Źródło:
International Journal of Electronics and Telecommunications; 2015, 61, 2; 143-149
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of outliers on inequality measures – a comparison between Polish Voivodeships
Autorzy:
Ostasiewicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/434056.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
inequality
outliers
Gini index
Theil index
Atkinson indexes
Opis:
It is known that outlying (large) incomes strongly influence the results of inequality measuring. Thus, there is a question how to deal with such observations. In this paper the rule of excluding observations based on (Q1 – 1.5Q; Q3 + 1.5Q) interval is investigated, for data from household budget survey in 2011, for Polish voivodeships. It is shown that although including more observations obviously changes the values of inequality measures, the relative values of them are surprisingly quite stable, with the rank correlation coefficient never over 0.9.
Źródło:
Śląski Przegląd Statystyczny; 2014, 12(18); 105-120
1644-6739
Pojawia się w:
Śląski Przegląd Statystyczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Nisga’a Self-Government and International Standards of Indigenous Self-Determination
Autorzy:
Szpak, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2015613.pdf
Data publikacji:
2020-09-30
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
indigenous peoples
Nisga’a Nation
right to self-determination
self-governance
Opis:
The paper concentrates on the right to self-determination of indigenous peoples on the basis of the Nisga’a Nation. The author analyzes the most important provisions of the Nisga’a Final Agreement, in particular those envisaging self-determination of the Nisga’a Nation. Then the author briefly examines the Nisga’a Constitution which may be regarded as a means to implement the Nisga’a Final Agreement. It shows how the Nisga’a selfgovernance model fits into the provisions on self-determination of indigenous peoples. The thesis of this paper is that the Nisga’a self-governance is consonant with international legal standards expressed in the UN Declaration on the Rights of Indigenous Peoples. Nisga’a selfgovernment model is much more than just cultural autonomy: it actually amounts to political autonomy. This subject is worth exploring because it may serve as a pattern to be followed with reference to other indigenous peoples, not only in Canada.
Źródło:
Polish Political Science Yearbook; 2020, 3 (49); 77-95
0208-7375
Pojawia się w:
Polish Political Science Yearbook
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of thermogravimetric characteristics of fresh and used engine oils
Autorzy:
Kozak, Miłosław
Powiązania:
https://bibliotekanauki.pl/articles/133176.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
engine oil
thermogravimetric analysis
TGA
soot content
olej silnikowy
analiza termograwimetryczna
zawartość sadzy
Opis:
The requirements set for engine oils are nowadays very high, varied, often contradictory and significantly go beyond the classic functions of engine oils. Also for the testing of engine oils, many different and advanced research methods are currently used. This article describes tests of fresh and used oil from a diesel engine using thermogravimetric analysis. This method was also used to determine the soot content of the used oil. The tests showed that the thermograms of fresh and used oil are similar, however in the oil used in the diesel engine the soot content increases.
Źródło:
Combustion Engines; 2019, 58, 3; 289-292
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inter-provincial migration in Italy: a comparison between Italians and foreigners
Autorzy:
Casacchia, Oliviero
Reynaud, Cecilia
Strozza, Salvatore
Tucci, Enrico
Powiązania:
https://bibliotekanauki.pl/articles/623673.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Internal migration
foreign population
gravity model
Italy
Opis:
Internal migration in Italy increased in the 2000s due to foreigners residing in the country. Foreigners have changed the characteristics of Italy’s internal migration. Extended gravity models were run to highlight the differences between the migratory behaviours of Italians and foreigners. The model was implemented to detect the different effects of the Italian and foreign populations, and the distances between the provinces of origin and destinations of the inter-provincial migration of Italians and foreigners. Estimations obtained for the years 1995, 2000, 2005, 2010, and 2015 highlight the different evolutions of the phenomenon.
Źródło:
European Spatial Research and Policy; 2019, 26, 1; 101-126
1231-1952
1896-1525
Pojawia się w:
European Spatial Research and Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of karateka’s and judoka’s foot arch dynamics
Autorzy:
Šenkýř, Jan
Čihounková, Jitka
Reguli, Zdenko
Powiązania:
https://bibliotekanauki.pl/articles/772724.pdf
Data publikacji:
2016
Wydawca:
PPHU Projack Jacek Wąsik
Tematy:
barefooted activity
dexterity
drop test
judo
karate
martial art
Opis:
The benefits of barefoot walking is widely known. Our purpose was to examine the foot arch dynamics of sportsmen, who perform barefooted. The research sample consists of 25 skilled male judoka and 25 karateka (age 18 - 32 years, minimum 6 hours of training a week). We used navicular drop test to determine the level of foot arch dynamics. Results showed the significant differences between left and right foot of judoka and karateka and between two groups of participants as well (judoka ́s foot arch dynamics is bigger than karateka ́s). The differences could be caused by different way of shifting, diff erent softness of the mats and different dynamics of each performance.
Źródło:
Physical Activity Review; 2016, 4; 172-177
2300-5076
Pojawia się w:
Physical Activity Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evidence-Based Ergonomics. A Comparison of Japanese and American Office Layouts
Autorzy:
Noro, K.
Fujimaki, G.
Kishi, S.
Powiązania:
https://bibliotekanauki.pl/articles/89780.pdf
Data publikacji:
2003
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
evidence based ergonomics design
work style
eye movement
warunki pracy
ergonomia
komputer
projektowanie miejsc pracy
pomieszczenie biurowe
Opis:
There is a variety of alternatives in office layouts. Yet the theoretical basis and criteria for predicting how well these layouts accommodate employees are poorly understood. The objective of this study was to evaluate criteria for selecting office layouts. Intensive computer workers worked in simulated office layouts in a controlled experimental laboratory. Eye movement measures indicate that knowledge work requires both concentration and interaction. Findings pointed to one layout as providing optimum balance between these 2 requirements. Recommendations for establishing a theoretical basis and design criteria for selecting office layouts based on work style are suggested.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2003, 9, 4; 527-538
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of nature inspired algorithms for the quadratic assignment problem
Autorzy:
Chmiel, W.
Kadłuczka, P.
Kwiecień, J.
Filipowicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/202135.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
permutation problem
quadratic assignment problem
ant algorithm
bees algorithm
problem permutacji
problem przydziału kwadratowego
algorytm Ant Colony
algorytm pszczół
Opis:
This paper presents an application of the ant algorithm and bees algorithm in optimization of QAP problem as an example of NP-hard optimization problem. The experiments with two types of algorithms: the bees algorithm and the ant algorithm were performed for the test instances of the quadratic assignment problem from QAPLIB, designed by Burkard, Karisch and Rendl. On the basis of the experiments results, an influence of particular elements of algorithms, including neighbourhood size and neighbourhood search method, will be determined.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 4; 513-522
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a comparison principle for a quasilinear elliptic boundary value problem of a nonmonotone type
Autorzy:
Křížek, Michal
Liu, Liping
Powiązania:
https://bibliotekanauki.pl/articles/1339322.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
comparison principle
anisotropic heat conduction
nonlinear boundary value problem
Opis:
A nonlinear elliptic partial differential equation with the Newton boundary conditions is examined. We prove that for greater data we get a greater weak solution. This is the so-called comparison principle. It is applied to a steady-state heat conduction problem in anisotropic magnetic cores of large transformers.
Źródło:
Applicationes Mathematicae; 1996-1997, 24, 1; 97-107
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Different Theoretical Models of Positron Lifetime Spectra for Polymers
Autorzy:
Kansy, J.
Powiązania:
https://bibliotekanauki.pl/articles/1812531.pdf
Data publikacji:
2008-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
Opis:
The same reference positron lifetime spectra of polyurethane, measured in temperature range 112 to 390 K, were analyzed with three theoretical models: the "conventional" model with three exponential decay component of discrete values of lifetimes, a model with one discrete exponential component and two "packages" of exponentials with log-normal distribution of annihilation rates, and a model considering positronium slow localization, positronium internal relaxation as well as "delayed" formation of positronium. It turns out that the two latter models fit to the experimental data with the same excellent quality, in spite of the fact that in both models the ratio of intensities related to para-positronium and ortho-positronium was constrained to be as 1:3.
Źródło:
Acta Physica Polonica A; 2008, 113, 5; 1397-1407
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of interpolation methods for flood zones adjacent to a stream
Autorzy:
Grzelak, D.
Kwinta, A.
Powiązania:
https://bibliotekanauki.pl/articles/100717.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie
Tematy:
flood zones
terrain modeling
interpolation method
strefa zalewowa
modelowanie terenu
Opis:
Even small streams may cause severe flooding. The evaluation of the safety of people and objects in the area of a watercourse is related to modelling of flood zones. The area of potential flood zones is calculated on the basis of a Digital Terrain Model (DTM). This paper presents interpolation methods for creating DTMs based on land surveying data. The result of sample modelling is compared with selected interpolation methods.
Źródło:
Geomatics, Landmanagement and Landscape; 2013, 3; 49-58
2300-1496
Pojawia się w:
Geomatics, Landmanagement and Landscape
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison study on a new five-parameter generalized Lindley distribution with its sub-models
Autorzy:
Tharshan, Ramajeyam
Wijekoon, Pushpakanthie
Powiązania:
https://bibliotekanauki.pl/articles/1363562.pdf
Data publikacji:
2020-06-05
Wydawca:
Główny Urząd Statystyczny
Tematy:
Lindley distribution
mixture distributions
size-biased distributions
maximum likelihood estimation
Opis:
In recent years, modifications of the classical Lindley distribution have been considered by many authors. In this paper, we introduce a new generalization of the Lindley distribution based on a mixture of exponential and gamma distributions with different mixing proportions and compare its performance with its sub-models. The new distribution accommodates the classical Lindley, Quasi Lindley, Two-parameter Lindley, Shanker, Lindley distribution with location parameter, and Three-parameter Lindley distributions as special cases. Various structural properties of the new distribution are discussed and the size-biased and the lengthbiased are derived. A simulation study is conducted to examine the mean square error for the parameters by means of the method of maximum likelihood. Finally, simulation studies and some real-world data sets are used to illustrate its flexibility in terms of its location, scale and shape parameters.
Źródło:
Statistics in Transition new series; 2020, 21, 2; 89-117
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Controversial advertising of medicines. A comparison between Poland and the United States
Autorzy:
Makowska, Marta
Powiązania:
https://bibliotekanauki.pl/articles/653027.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
pharmaceutical industry
advertisement
drugs
law
ethics
Opis:
For many years, the subject of aggressive marketing campaigns conducted by pharmaceutical companies has been raised in Poland. Drug ads are everywhere, on television, the radio, magazines and on the Internet. Therefore, it is extremely important is to ensure both their legal and ethical dimension. This article will present the differences between direct-to-consumer advertising of medicines in Poland and in the US. The dissimilarities result mainly from differences in legislation. In Poland, the law is much stricter than in the US. For example, in the United States companies are allowed to advertise prescription drugs directly to patients. In the whole of the European Union, and thus in Poland, it is strictly prohibited. The article will also present other regulations existing in Poland and in the United States and it will compare them. It will offer examples of violations of the law and ethics in the advertising of medicine in both countries. Lastly, it will briefly outline the negative consequences of unacceptable pharmaceutical marketing.
Źródło:
Annales. Etyka w Życiu Gospodarczym; 2018, 21, 5; 67-79
1899-2226
2353-4869
Pojawia się w:
Annales. Etyka w Życiu Gospodarczym
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concert Hall Sound Clarity: A Comparison of Auditory Judgments and Objective Measures
Autorzy:
Miśkiewicz, A.
Rogala, T.
Rościszewska, T.
Rudzki, T.
Fidecki, T.
Powiązania:
https://bibliotekanauki.pl/articles/177211.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
sound clarity
room acoustics
psychoacoustics
Opis:
The purpose of the study was to compare auditory judgments of sound clarity of music examples recorded in a concert hall with predictions of clarity made from the impulse response signal recorded in the same hall. Auditory judgments were made with the use of two methods: by rating sound clarity on a numerical scale with two endpoints, and by absolute magnitude estimation. Results obtained by both methods were then compared against the values of clarity indices, C80 and C50, determined from the impulse response of the concert hall, measured in places in which the microphone was located during recording of music examples. Results show that auditory judgments of sound clarity and predictions made from the C80 index yield a similar rank order of data, but the relation between the C80 scale and perceived sound clarity is nonlinear. The data also show that the values of C80 and C50 indices are in very close agreement.
Źródło:
Archives of Acoustics; 2012, 37, 1; 41-46
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Fake News Detecting and Fact-Checking AI Based Solutions
Autorzy:
Školkay, Andrej
Filin, Juraj
Powiązania:
https://bibliotekanauki.pl/articles/484700.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Warszawski. Wydział Dziennikarstwa, Informacji i Bibliologii
Tematy:
artificial intelligence
comparison
fact-checking
fake news
testing
Opis:
Scientific objective of this paper is to analyse how advanced are Artificial Intelligence (AI) tools to fight successfully information disorder. More specifically, this is an overview and ranking on existing tools based on AI in this specific area. Research method is comparative analytics. We compare the most developed and publicly available fake-news detecting and fact-checking AI based solutions (intelligent machines). The comparison is based on two key parameters: accuracy and comprehensiveness. Results and conclusions: Analyse show that a third of the examined AI systems are, in terms of comprehensiveness, in the top category, while the majority are in the medium category. As far as accuracy is concerned, very few AI machine developers are interested in providing further details about their products and functionalities for studies such as ours which raises suspicions about their actual performance. Surprisingly, one of the most discussed AI systems among EU leaders seems to actually belong to the least developed. Cognitive value: There is a need for a larger and more detailed study with involvement of AI specialists who would be able, and allowed, to test all available AI machines with their key features and functionalities.
Źródło:
Studia Medioznawcze; 2019, 4; 365-383
2451-1617
Pojawia się w:
Studia Medioznawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Social efficiency of employment in three sectors ? a comparison of Polish regions
Autorzy:
Cyrek, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/1833825.pdf
Data publikacji:
2017-09-30
Wydawca:
Instytut Badań Gospodarczych
Tematy:
social efficiency
employment
three sectors
regions
DEA method
Opis:
Research background: Regions that are able to use their resources in the most efficient way could be perceived as valuable benchmarks when shaping socio-economic policy. The concept of efficiency, however, may be related not only to pure economic categories but to social goals as well. The economic and social spheres overlap and often have some common origins, among which, the sectoral structure of employment seems to be an important one. Purpose of the article: The aim of the study was to compare the social efficiency of employment in three sectors in Polish voivodeships. Not only were we evaluating the relative performance of each region, but we were also paying attention to the efficiency of engagement of human resources in the agricultural, industrial and service sectors. Methods: We adopted the DEA method to assess the social efficiency of Polish regions. We have evaluated social cohesion concerning its two output dimensions: positive, which may be described by social activity, and negative, which may be reflected in the form of social exclusion stemming from material sources. We took into account the level of employment in agricultural, industrial and service sectors as inputs in the model and thus focused our attention on the three sectoral structure of the regional economies. Our model assumed non-radial developmental paths and was input oriented (NR-CCR). The data described the 16 Polish voivodeships in the year 2015, and were extracted from the Central Statistical Office of Poland?s databases. Findings & value added: The research conducted indicates that Polish regions which were the most efficient in terms of social integration were simultaneously those with the best economic results in terms of GDP per capita. The highest social efficiency level was characteristic for employment in the service sector, while agriculture was placed at the lowest level. The same pattern was revealed when social activity and the danger of poverty were considered separately. Thus, structural development appears to be favourable for regional economies also in terms of social cohesion, which is a factor often neglected in the literature.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2017, 12, 3
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparison of truck driver safety between the EU and the USA
Autorzy:
Kapusta, J.
Kalašová, A.
Powiązania:
https://bibliotekanauki.pl/articles/198153.pdf
Data publikacji:
2016
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
truck
road transportation
accident rate
regulations
safety system
ciężarówka
transport drogowy
wypadkowość
przepisy
system bezpieczeństwa
Opis:
Road transportation is playing an important role in almost all freight movements and contributes to the economy. It has the highest share in the modal division of transported goods. This situation is not about to change in the coming years. Therefore, it is necessary to change the current situation and modify rules and regulations, which could lead to a decrease in the number of accidents in either the EU or the USA. This paper identifies and compares different safety measures, rules and regulations governing the safety of truck transport in the EU and the USA. The number of accidents is a good safety indicator. Finally, suggestions for improvements in terms of truck drivers’ safety in the EU and the USA are proposed.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2016, 93; 49-58
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Underdiagnosis of childhood asthma: A comparison of survey estimates to clinical evaluation
Autorzy:
Brożek, Grzegorz M.
Farnik, Małgorzata
Lawson, Joshua
Zejda, Jan E.
Powiązania:
https://bibliotekanauki.pl/articles/2179065.pdf
Data publikacji:
2013-12-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
children
asthma
clinical epidemiology
underdiagnosis
Opis:
Objectives: Diagnostic patterns play a role in asthma prevalence estimates and could have implications for disease management. We sought to determine the extent to which questionnaire-derived estimates of childhood asthma reflect the disease's true occurrence. Materials and Methods: Children aged 6-12 years from Katowice, Poland, were recruited from a crosssectional survey (N = 1822) via primary schools. Students were categorized into three mutually exclusive groups based on survey responses: "Asthma" (previously diagnosed asthma); "Respiratory symptoms" (no previous diagnosis of asthma and one or more respiratory symptoms during last year), "No respiratory symptoms" (no previous diagnosis of asthma or respiratory symptoms). A sample of children from each group (total N = 456) completed clinical testing to determine asthma presence according to GINA recommendations. Results: Based on the survey, 5.4% of children were classified with asthma, 27.9% with respiratory symptoms, and 66.7% with no respiratory symptoms or asthma. All previously known 41 cases of asthma were confirmed. New diagnoses of asthma were made in 21 (10.9%) and 8 (3.6%) of subjects from the "Respiratory symptoms" (N = 192) and "No respiratory symptoms" (N = 223) groups, respectively. The overall prevalence of childhood asthma, incorporating the results of clinical examination, was 10.8% (95% CI: 9.4-12.2), compared to the questionnaire-derived figure of 5.4% (95% CI: 4.4-6.5%) and affected females more than males. Conclusions: Asthma prevalence was underestimated in this population possibly resulting from under-presentation or under-diagnosis. This could have potential implications for proper management and well-being of children. Questionnaire estimates of prevalence should be considered carefully in the context of regional diagnostic patterns.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2013, 26, 6; 900-909
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Comparison of Proximity Sensors for a Bicycle-to-Car Distance Rangefinder
Autorzy:
Zieliński, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/1844684.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
distance measurement
road traffic
proximity sensors
Opis:
In the article, three types of proximity sensors that might be used in bicycle rangefinder to measure the distance between the bicycle and an overtaking car are compared. The influence of various factors on the accuracy of the distance measurements obtained using ultrasonic, infrared and laser sensors is tested, among others, light conditions, car surface type and colour, rain, pollination and vibrations.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 2; 277-282
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aerosol optical properties over Svalbard: a comparison between Ny-Alesund and Hornsund
Autorzy:
Pakszys, P.
Zielinski, T.
Powiązania:
https://bibliotekanauki.pl/articles/47955.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
aerosol optical property
Svalbard
Arctic aerosol
optical property
Spitsbergen fjord
Kongsfjorden
Hornsund
Opis:
This paper presents the CAMS model based aerosol optical properties calculated for two Spitsbergen fjords, Kongsfjorden (Ny-Ålesund) and Hornsund (Polish Polar Station in Hornsund) measured between 2010 and 2015. A small decrease in Aerosol Optical Depth (AOD) is shown throughout the study period leading to an alteration of the state of the polar atmosphere. However, the potential differences observed between the stations were not statistically significant. While during the studied period no significant differences in chemical composition between the stations were observed, increasing mean values of Black Carbon (BC) were found to be associated with an increasing number of wild forest fires in remote areas producing smoke plumes, which are further transported over vast distances and reach Spitsbergen.
Źródło:
Oceanologia; 2017, 59, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 1552

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