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Tytuł:
Schemes of social insurance system
Autorzy:
Peto, Zhaklina
Katro, Kestrin
Powiązania:
https://bibliotekanauki.pl/articles/1035758.pdf
Data publikacji:
2010
Wydawca:
Academicus. International Scientific Journal publishing house
Tematy:
social Insurance
Disease scheme
the scheme of work accident and occupational diseases
Pregnancy scheme
Pension scheme
Unemployment scheme
Opis:
In this article we will analyzed the social security schemes as important elements of this system but also to the individuals. Social security schemes have been established and developed for a very important purpose, to protect individuals and their families against the attack of social risks. For the effect of organizing better social security, the Social Insurance System provides benefits to individuals divided into three groups, or otherwise termed, into three schemes: The scheme of special benefits. The scheme of general benefits. The scheme of unemployment. Analysis of elements of these schemes is treated in detail by virtue of the basic principles of this system the directives of the Council of Europe, as well as international conventions.
Źródło:
Academicus International Scientific Journal; 2010, 02; 49-62
2079-3715
2309-1088
Pojawia się w:
Academicus International Scientific Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Long Message Threshold Scheme with a Low Degree Polynomial
Podział progowy długich wiadomości z wykorzystaniem wielomianów niskiego stopnia
Autorzy:
Kryński, J.
Maćków, W.
Powiązania:
https://bibliotekanauki.pl/articles/153576.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
schemat podziału progowego sekretu
schemat wielosekretowy
schemat Shamira
threshold secret sharing scheme
multi-secret scheme
Shamir's scheme
Opis:
The standard threshold sharing schemes applied directly to large secret are ineffective and dangerous. Ineffectiveness of standard methods results from the need to generate and store a large number of shadows. In turn, the low security level of standard methods may be caused by not taking into account the properties of large files, such as file format and multiple reduplication of the same information contained in it. For these reasons extended methods are used to share large secrets, methods belonging to class of so called multi-secret threshold schemes. Most of them are based on generalized Shamir's scheme. The paper introduces a new threshold secret sharing scheme belonging to the mentioned class. An efficiency of our solution is comparable to other analyzed solutions based on generalized Shamir's scheme while degree of interpolation polynomial is decreased. The performance of the implemented method was additionally compared with the implementation of method using 3DES encryption and classic Shamir scheme to share the encryption key.
Standardowe schematy podziału sekretu stosowane bezpośrednio do długich wiadomości są nieefektywne i potencjalnie niebezpieczne. Ich niska efektywność wynika głównie z konieczności generowania i przechowywania dużej ilości cieni. Z kolei niski poziom bezpieczeństwa jest następstwem nieuwzględniania właściwości długich wiadomości, takich jak format pliku czy powtarzalność fragmentów informacji w niej zawartej. Z tego powodu w praktyce do podziału długich wiadomości stosuje się metody rozszerzone, tzw. wielosekretowe schematy podziału. Większość z nich oparta jest na uogólnionym schemacie Shamira. W artykule zaproponowano nowy schemat podziału należący do tej klasy metod. Wydajność proponowanego rozwiązania jest porównywalna z innymi przeanalizowanymi rozwiązaniami wykorzystującymi uogólniony schemat Shamira, natomiast wyraźnie niższy jest stopień wykorzystywanych w schemacie wielomianów interpolacyjnych. Efektywność zaimplementowanej metody została dodatkowo porównana z metodą hybrydową wykorzystującą szyfrowani 3DES i klasyczny schemat Shamira do podziału klucza.
Źródło:
Pomiary Automatyka Kontrola; 2010, R. 56, nr 12, 12; 1529-1532
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Двовимірна типологія частково фразеологізованих речень
Two‑Dimensional Typology of Partially Phraseologized Sentences
Autorzy:
Личук, Марія
Powiązania:
https://bibliotekanauki.pl/articles/16511489.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
partially phraseologized sentence
structural type
semantic type
structural scheme
phrase‑scheme
Opis:
The article is devoted to research into the systematization of the structural and semantic types of partially phraseologized sentences. Partially phraseologized sentences have been ascertained to have their functional and communicative purpose in language and speech. The formal and semantic principles of the typology of partially phraseologized sentences have been determined. Structural typologies of partially phraseologized sentences are based on quantitative and morphological criteria. Analyzed have been the structural types of partly phraseologized sentences. Partially phraseologized sentences are formed by two‑, three‑, four‑, and five‑part phrase‑complexes. The semantic types of partially phraseologized sentences are based on the type of syntactic relations between their two parts, depending on which we can single out: 1) sentences with temporal relations; 2) sentences with relations of generalized condition; 3) sentences with explanatory relations; 4) sentences with applicative relations.
Źródło:
Slavia Orientalis; 2022, LXXI, 2; 359-371
0037-6744
Pojawia się w:
Slavia Orientalis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diffusion approximation of recurrent schemes for financial markets, with application to the Ornstein-Uhlenbeck process
Autorzy:
Mishura, Y.
Powiązania:
https://bibliotekanauki.pl/articles/952778.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
diffusion approximation
semimartingale
recurrent scheme
financial market
multiplicative scheme
Ornstein-Uhlenbeck process
Opis:
We adapt the general conditions of the weak convergence for the sequence of processes with discrete time to the diffusion process towards the weak convergence for the discrete-time models of a financial market to the continuous-time diffusion model. These results generalize a classical scheme of the weak convergence for discrete-time markets to the Black-Scholes model. We give an explicit and direct method of approximation by a recurrent scheme. As an example, an Ornstein-Uhlenbeck process is considered as a limit model.
Źródło:
Opuscula Mathematica; 2015, 35, 1; 99-116
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the compact explicit filtering method on the perturbations growth in temporal shear-layer flow
Wpływ jawnej filtracji metodą kompactową na wzrost zaburzeń w nieustalonym przepływie z warstwą ścinającą
Autorzy:
Tyliszczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/281098.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
compact scheme
filtering
aliasing removal
Opis:
In this paper the effect of the explicit filtering of high frequency phenomena performed by means of the high order compact filters is presented. A 2D unsteady incompressible flow in which the perturbations super-imposed on the mean velocity profile evolve in time is considered. The dependence of the amplitudes of disturbances is analysed for various filtering procedures and compared with other methods intended to remove high frequency waves.
W pracy przedstawiono efektywność jawnej filtracji zjawisk wysokoczęstotliwościowych przy zastosowaniu filtracji kompaktowej. Analizie poddano nieściśliwy dwuwymiarowy przepływ z warstwą ścinającą w którym rozpatrywano ewolucję zaburzeń nałożonych na pole prędkości średniej. Przedstawiono porównania wartości amplitud zaburzeń obliczonych przy zastosowaniu różnych procedur filtracji oraz dla innych metod stosowanych do eliminowania zjawisk wysokoczęstotliwościowych.
Źródło:
Journal of Theoretical and Applied Mechanics; 2003, 41, 1; 19-32
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensitivities of the Tiedtke and Kain-Fritsch Convection Schemes for RegCM4.5 over West Africa
Autorzy:
Adeniyi, Mojisola Oluwayemisi
Powiązania:
https://bibliotekanauki.pl/articles/108457.pdf
Data publikacji:
2019
Wydawca:
Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
Tematy:
convective precipitation
West African monsoon
Kain-Fritsch convection scheme
Tiedtke convection scheme
African easterly jet
Opis:
Realistic simulation of weather and climate parameters over West Africa is daunting, so the performance of the Tiedtke and Kain-Fritsch convection schemes within version 4.5 of the Regional Climate Model (RegCM4.5) of the International Centre for Theoretical Physics, Trieste is evaluated over West Africa for improved simulation. The two schemes are compared to two traditional mixture schemes (Grell on land and Emanuel on Ocean), outperforming the mixture schemes with reduced magnitude and spatial coverage of dry bias. Both schemes simulate precipitation over West Africa with a low dry bias, however, the Kain-Fritsch convection scheme simulates more realistic precipitation in the West African convective environment. This is associated with the inclusion of a variable cloud radius and the convective available potential energy closure for the Kain-Fritsch in contrast to a fixed cloud radius and moisture convergence of the of the Tiedtke scheme. The simulated outgoing longwave radiation and omega lend support to the spatial variations and amount of simulated precipitation in the different areas by the schemes. The spatial variation of simulated temperature over the target region shows lower bias than precipitation by all the convection schemes. Soil moisture is more accurately simulated (correlation coefficient ~1) in the savannah (8-10°N) and Sahel (22-28°N) environments by all the convection schemes. Tiedtke performs the most accurate simulations of the pattern and profile of zonal wind which controls climate circulation, with slightly weaker simulations of the Africa easterly jet with core magnitude less than 10 m·s-1. The accuracy of the KF and Tiedtke in RegCM4.5 in simulating the climate of West Africa is documented for the first time for application in future studies over the region.
Źródło:
Meteorology Hydrology and Water Management. Research and Operational Applications; 2019, 7, 2; 27-37
2299-3835
2353-5652
Pojawia się w:
Meteorology Hydrology and Water Management. Research and Operational Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Norwegian National Insurance Scheme as the main element of the Norwegian “welfare state”
Autorzy:
Nowiak, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1178195.pdf
Data publikacji:
1996
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Norway
Welfare state
National Insurance Scheme
Opis:
The National Insurance Scheme is the main element of the Norwegian ’’welfare state”. The Scheme secures people’s finance when they are sick, disabled, unemployed or old, or when they have no one to support them and are unable to support themselves. The National Insurance Scheme is the most fundamental cornerstone of the structure represented by the ’’welfare state”. The Scheme consists of long-term benefits; pensions and transitional allowances; short-term benefits; daily allowances for the sick, and daily cash benefits for the unemployed and benefits in kind; and expenditure for health care and rehabilitation.
Źródło:
Folia Scandinavica Posnaniensia; 1996, 3; 57-66
1230-4786
2299-6885
Pojawia się w:
Folia Scandinavica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Convergence results for unbounded solutions of first order non-linear differential-functional equations
Autorzy:
Leszczyński, Henryk
Powiązania:
https://bibliotekanauki.pl/articles/1311094.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
error estimates
recurrence inequalities
difference scheme
Opis:
We consider the Cauchy problem in an unbounded region for equations of the type either $D_{t}z(t,x) = f(t,x,z(t,x),z_{(t,x)},D_{x}z(t,x))$ or $D_{t}z(t,x)= f(t,x,z(t,x),z,D_{x}z(t,x))$. We prove convergence of their difference analogues by means of recurrence inequalities in some wide classes of unbounded functions.
Źródło:
Annales Polonici Mathematici; 1996, 64, 1; 1-16
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Looking for big money in the grey zone. Simulation of high yield investment programs strategies
Autorzy:
Gniadzik, K.
Kowalik, G.
Jarczyk, O.
Nielek, R.
Powiązania:
https://bibliotekanauki.pl/articles/305658.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
HYIP
Ponzi Scheme
fraud
simulation
strategy
Opis:
High Yield Investment Programs (HYIPs) are online versions of a Ponzi scheme, a fraud that offers extremely high interest rates to attract investors – and pays them up to the moment when HYIP owner decides to run away with the money accumulated in the account. This article presents a simulation focused on the connections between investments in appealing websites, advertising, and run- away strategies to explore and describe one of the grey zone areas. The model is based to a large extent on real-life data acquired from HYIP monitors. In this paper, we have proven that advertising and layout have a great impact on an HYIP’s balance. Moreover, most HYIPs are capable of gaining similar balance; however, there are also conservative strategies that significantly reduce profits.
Źródło:
Computer Science; 2015, 16 (3); 237-251
1508-2806
2300-7036
Pojawia się w:
Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A scheme for congruence semidistributivity
Autorzy:
Chajda, Ivan
Horváth, Eszter
Powiązania:
https://bibliotekanauki.pl/articles/728970.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
∧ -semidistributivity
generalized semidistribitive law
triangular scheme
Opis:
A diagrammatic statement is developed for the generalized semidistributive law in case of single algebras assuming that their congruences are permutable. Without permutable congruences, a diagrammatic statement is developed for the ∧-semidistributive law.
Źródło:
Discussiones Mathematicae - General Algebra and Applications; 2003, 23, 1; 13-18
1509-9415
Pojawia się w:
Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Arystoteles i Tarski
Aristotle and Tarski
Autorzy:
Woleński, Jan
Powiązania:
https://bibliotekanauki.pl/articles/938501.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
truth
semantics
definition
correspondence
scheme (T)
Opis:
Alfred Tarski frequently declared that his semantic definition of truth was inspired by Aristotle’s views. The present paper discusses this issue in the context of Marian Wesoły’s criticism of the thesis that there is an affinity between Tarski’s views and those of Aristotle. The article concludes with an inquiry into whether Aristotle’s definition of truthfulness can be identified with the correspondence theory of truth. 
Źródło:
Peitho. Examina Antiqua; 2017, 8, 1; 261-270
2082-7539
Pojawia się w:
Peitho. Examina Antiqua
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ID-based, Proxy, Threshold Signature Scheme
Autorzy:
Pomykała, Jacek
Kułakowski, Henryk
Sapiecha, Piotr
Grela, Błażej
Powiązania:
https://bibliotekanauki.pl/articles/1844644.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ID-based
proxy
threshold
signature
scheme
Opis:
We propose the proxy threshold signature scheme with the application of elegant construction of verifiable delegating key in the ID-based infrastructure, and also with the bilinear pairings. The protocol satisfies the classical security requirements used in the proxy delegation of signing rights. The description of the system architecture and the possible application of the protocol in edge computing designs is enclosed.
Źródło:
International Journal of Electronics and Telecommunications; 2021, 67, 2; 201-205
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quaternion Feistel Cipher with an Infinite Key Space Based on Quaternion Julia Sets
Autorzy:
Dzwonkowski, M.
Rykaczewski, R.
Powiązania:
https://bibliotekanauki.pl/articles/308071.pdf
Data publikacji:
2015
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
cryptography
lossless scheme
multimedia encryption
security
Opis:
In this paper Quaternion Feistel Cipher (QFC) with an infinite key space based on quaternion Julia sets is proposed. The basic structure of the algorithm is based on the scheme proposed in 2012 by Sastry and Kumar. The proposed algorithm uses special properties of quaternions to perform rotations of data sequences in 3D space for each of the cipher rounds. It also uses Julia sets to form an infinite key space. The plaintext is divided into two square matrices of equal size and written using Lipschitz quaternions. A modular arithmetic was implemented for operations with quaternions. A computer-based analysis has been carried out and obtained results are shown at the end of this paper.
Źródło:
Journal of Telecommunications and Information Technology; 2015, 4; 15-21
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Probabilistic Scheme with Uniform Correlation Structure
Autorzy:
Calabrese, Raffaella
Powiązania:
https://bibliotekanauki.pl/articles/465800.pdf
Data publikacji:
2013
Wydawca:
Główny Urząd Statystyczny
Tematy:
probabilistic scheme
uniform correlation
binary event
Opis:
The probabilistic schemes with independence between the trials show different dispersion characteristics depending on the behaviour of the probabilities of the binary event in the trials. This work proposes a probabilistic scheme with uniform correlation structure that leads to different dispersion characteristics depending on the sign of the linear correlation. Finally, a hypothesis test is proposed to identify the type of the dispersion of the probabilistic scheme.
Źródło:
Statistics in Transition new series; 2013, 14, 1; 129-138
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Piramidy finansowe – pojęcie i modele funkcjonowania
Pyramid schemes – concept and functioning models
Autorzy:
Bojarski, Leszek
Powiązania:
https://bibliotekanauki.pl/articles/698213.pdf
Data publikacji:
2020
Wydawca:
Szkoła Główna Handlowa w Warszawie
Tematy:
financial scheme
financial fraud
Ponzi scheme
investment hedging
piramida finansowa
oszustwo finansowe
schemat Ponziego
zabezpieczanie inwestycji
Opis:
The progressive development of financial markets contributes to the emergence of economic operators which, by offering substantial returns, encourage potential investors who are not fully aware of the risks associated with a particular financial investment. As a result, there are more and more entities whose activities can be described as pyramid schemes. The aim of this article is to present the key features of pyramid schemes in the context of their models and the bases of their functioning. The analysis of the pyramid schemes in Poland indicates that these entities have similar features and models of operation enabling them to attract as many investors as possible. In most cases they offer a high return on investment with a relatively or very low investment risk. Their offer is based on unsecured investments and complex or unclear investment strategies.
Postępujący rozwój rynków finansowych przyczynia się do powstawania podmiotów gospodarczych, które oferując osiągnięcie znaczących zysków, zachęcają potencjalnych inwestorów nieposiadających pełnej świadomości ryzyka związanego z daną inwestycją finansową. W konsekwencji pojawia się coraz więcej podmiotów, których działalność można określić jako piramidy finansowe. Celem niniejszego artykułu jest przedstawienie kluczowych cech piramid finansowych w kontekście modeli i podstaw ich funkcjonowania. Analiza piramid finansowych w Polsce wskazuje, że podmioty te mają podobne cechy i modele działania umożliwiające im pozyskanie jak największej liczby inwestorów. W większości przypadków oferują one wysoki zwrot z inwestycji przy stosunkowo lub bardzo niskim ryzyku inwestycyjnym. Ich oferta jest oparta o niezabezpieczone inwestycje oraz skomplikowane lub niejasne strategie inwestycyjne.
Źródło:
Kwartalnik Nauk o Przedsiębiorstwie; 2020, 54, 1; 91-97
1896-656X
Pojawia się w:
Kwartalnik Nauk o Przedsiębiorstwie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Low-Frequency Sound Absorption Potential of Subwavelength Absorbers Based on Coupled Micro-Slit Panels
Autorzy:
Qian, Yujie
Gao, Zhengyuan
Zhang, Jie
Powiązania:
https://bibliotekanauki.pl/articles/31339748.pdf
Data publikacji:
2024
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
coupled MSP
CMSP
cavity-depth optimal scheme COS
panel thickness optimal scheme TOS
low frequency
absorption performance
Opis:
Due to space limitations during installation, reducing low-frequency noise has always been a challenging area. Sub-wavelength structures are typically favored in such scenarios for noise reduction. This paper explores the potential of micro-slit panels (MSP) for low-frequency sound absorption. To further optimize the panel thickness, coupled MSPs (CMSP) with a distance between two MSPs of less than 1 mm are proposed. Firstly, the low-frequency absorption performances of a single MSP based on two optimized schemes – the cavity-depth optimal scheme (COS) and the panel thickness optimal scheme (TOS) – are examined and compared with those of existing ultrathin metamaterials. The results demonstrate that MSP has significant potential for low frequency sound absorption, and COS allows for a smaller overall structural thickness but a larger panel thickness than TOS. Secondly, to reduce the panel thickness, the CMSP is developed and the theoretical model of its acoustic impedance is established and validated by experiments. Then, based on the theoretical model, the low-frequency absorption potential of CMSP is optimized using COS. The results show that both the overall thickness and the panel thickness of the CMSP absorber are reduced while maintaining better performance. Furthermore, the proposed absorber achieves a subwavelength scale since its total thickness can be as small as 0.138λ.
Źródło:
Archives of Acoustics; 2024, 49, 1; 121-128
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient implementation of a compact-pseudospectral method for turbulence modeling
Autorzy:
Tyliszczak, A.
Powiązania:
https://bibliotekanauki.pl/articles/1955215.pdf
Data publikacji:
2006
Wydawca:
Politechnika Gdańska
Tematy:
large eddy simulation
compact scheme
channel flow
Opis:
The paper is devoted to parallel implementation of a compact discretization scheme com-bined with the Fourier pseudospectral method. The idle time of processors resulting from the method of computating derivatives using compact schemes is eliminated by proper ordering of subtasks and by performing useful computations when processors are waiting for data from their neighbors. The correctnes of the algorithm is confirmed by comparison of results of LES simulations with DNS data for flow in a 3D channel with periodic non-slip wall boundary conditions.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2006, 10, 2; 125-138
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czy w Gnieźnie wszyscy jeździli na łyżwach? Łyżwy z osady Targowisko w Gnieźnie – przyczynek do sposobów ich użytkowania w okresie średniowiecza
Autorzy:
Waszczuk, Kamilla
Żychliński, Daniel
Prawniczak, Robert
Pachulski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1038460.pdf
Data publikacji:
2014-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Bone ice skates
use
interpretation
research scheme
Opis:
Did Everybody in Gniezno Ice-Skate? Ice Skates from the Settlement Targowisko in Gniezno– on the Means of Their Use in the Middle Ages and Not Only When writing the present article, the question was posed how common the use of ice skates had been in the period of the Middle Ages, confirmed in the literature on the subject by numerous references and information.It has been assumed that the issue is very complex. On the one hand, ice-skating was treated cursorily– any object made of bone whose shape resembled a “boat” must have been an ice-skate – on the other hand, the common use of skates found no confirmation in interdisciplinary studies. Meanwhile, our micro- and macroscopic analyses of the finds originating from the settlement in Gniezno called Targowisko, supported in full the conjecture that, in very wet places, surrounded by water, “ice-skating”, both as a means of transportation and as a form of recreation (!) was a part of everyday life. Moreover, a definite scheme of research has been developed which can be applied to all artefacts designated as ice skates; in all periods of history. Simultaneously, during our research, there arose many new questions which shall be answered, we hope, as a result of further analyses and related considerations. They are very intriguing questions as they concern man.
Źródło:
Slavia Antiqua: rocznik poświęcony starożytnościom słowiańskim; 2014, 55; 179-209
0080-9993
Pojawia się w:
Slavia Antiqua: rocznik poświęcony starożytnościom słowiańskim
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of copper sulfide flotation using a new collector in an optimized addition scheme
Autorzy:
Bazmandeh, Mehdi
Sam, Abbas
Powiązania:
https://bibliotekanauki.pl/articles/2146863.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
copper sulfide
reagents addition scheme
DMDT
Opis:
Selection of appropriate types of collectors as the main basis of flotation can have a significant impact on the process efficiency. In this regard, 2, 5-Dimercapto-1, 3, 4-thiadiazole (DMDT) was introduced as a new collector. And, its performance was compared with the prevalent collector C7240 (a mixture of 10–20 wt% sodium alkyl dithiophosphate and 20–30 wt% sodium mercaptobenzothiozole) and Sodium Isobutyl Xanthate (SIBX) on the flotation of copper sulfide ores. The effect of the reagent dosage (collector and frother) and pH level were studied using a design of experiment (DOE). Results showed effect of factors was significant in the case of copper recovery and grade of product. Consequently, the optimum range of the DMDT was 8 g/t at pH=11.8 in which the maximum grade and recovery were obtained. Also, the application of chemical agents also had a significant effect on flotation performance, so that the result of sequential addition of the collector indicated significantly improved recovery and grade. The use of a combination of collectors resulting in both physisorbed and chemisorbed surface products can also affect the froth structure and influence the final grade achieved. Accordingly, the best route of collector addition was DMDT at first, then C7240, and finally SIBX. Through this offer, the maximum recovery and grade of product were achieved 86.2% and 14.1% respectively. So, DMDT as a mixture of two others has a positive effect on the copper flotation efficiency.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 6; 71--79
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ajdukiewicz and the Notion of Conceptual Apparatus
Autorzy:
Marsonet, Michele
Powiązania:
https://bibliotekanauki.pl/articles/1968691.pdf
Data publikacji:
2021-07-01
Wydawca:
Academicus. International Scientific Journal publishing house
Tematy:
language
conceptual apparatus
conceptual scheme
ontology
empiricism
Opis:
The Polish philosopher Kazimierz Ajdukiewicz adopted the notion of “conceptual apparatus”, which is very similar to the idea of “conceptual scheme” put forward by Donald Davidson, Willard V. Quine, Nicholas Rescher and others. Ajdukiewicz’s theses are, in this regard, very important although less known, and he treated cognitive processes as inseparably connected with language.
Źródło:
Academicus International Scientific Journal; 2021, 12, 24; 226-229
2079-3715
2309-1088
Pojawia się w:
Academicus International Scientific Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Efficient Data Transmission in VANET Using Clustering Method
Autorzy:
Suganthi Evangeline, C.
Appu, S.
Powiązania:
https://bibliotekanauki.pl/articles/227295.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
VANET
RSU
2-layer stable clustering scheme
Opis:
A special type of Mobile Ad-hoc Networks (MANETs) which has frequent changes of topology and higher mobility is known as Vehicular Ad-hoc Networks (VANETs). In order to divide the network into groups of mobile vehicles and improve routing, data gathering, clustering is applied in VANETs. A stable clustering scheme based on adaptive multiple metric combining both the features of static and dynamic clustering methods is proposed in this work. Based on a new multiple metric method, a cluster head is selected among the cluster members which is taken from the mobility metrics such as position and time to leave the road segment, relative speed and Quality of Service metrics which includes neighborhood degree, link quality of the RSU and bandwidth. A higher QoS and cluster stability are achieved through the adaptive multiple metric. The results are simulated using NS2 and shows that this technique provides more stable cluster structured with the other methods.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 3; 309-313
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Europejska sieć bezpieczeństwa finansowego. Rozwiązania pokryzysowe
European system of financial supervision
Autorzy:
Iwanicz-Drozdowska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/11364430.pdf
Data publikacji:
2018
Wydawca:
Kancelaria Sejmu. Biuro Analiz Sejmowych
Tematy:
central bank
supervision
guarantee scheme
resolution
regulation
Opis:
The author reviews the EU financial supervisory and regulatory architecture which was introduced in 2010 as a response to the global financial crisis. The aim of this paper is to discuss the gaps identified in the financial safety net, as well as the decisions made by policymakers to strengthen financial regulation and supervision. Special attention is given to the financial stability mandate, micro- and macroprudential supervision, and resolution mechanism. The changes implemented are expected to reduce the severity of any future financial crisis.
Źródło:
Studia BAS; 2018, 1(53); 7-24
2080-2404
2082-0658
Pojawia się w:
Studia BAS
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
La magie du temps et des saisons dans la dramaturgie de Paul Willems
The magic of weather and seasons in the theater of Paul Willems
Autorzy:
Jakubczuk, Renata
Powiązania:
https://bibliotekanauki.pl/articles/1368151.pdf
Data publikacji:
2021-06-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Paul Willems
theater
rain
snow
transitivity scheme
Opis:
In the current article we are examining the presence, importance and significance of weather and seasons in dramatic works of the Belgian writer, Paul Willems. Our study relies upon the methodology of patternsof transitivity proposed by Jean-Pierre Richard. After explaining the principals of our approach, then presenting the corpus of the studied texts and formulating our basic hypothesis concerning the weather, we are reviewing four weather phenomena: the rain, the wind, the snow, and the sun. The completedanalysis confirmed the calming role of the rain, the soothing role of the sun and the warning role of the wind. However, we realized, besides the liberating role of the snow in the introduction, its more complex significance because it “weighs heavily” on the life of the characters.
Źródło:
Studia Romanica Posnaniensia; 2021, 48, 1; 105-117
0137-2475
2084-4158
Pojawia się w:
Studia Romanica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nonlinear boundary condition in electromagnetic theory - analytical scheme of formulation
Autorzy:
Sowa, M.
Spałek, D.
Powiązania:
https://bibliotekanauki.pl/articles/141200.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nonlinear boundary condition
nonlinear conductivity
analytical scheme
Opis:
The paper presents a method of how the nonlinear boundary condition [1] may be applied in nonlinear problems of electromagnetic field theory. It is introduced for problems with nonlinear conductivity. An analytical procedure has been constructed, which seeks to reduce calculations related with the nonlinear region. In order to verify the proposed solutions, two problems have been formulated: one of linear and the other of cylindrical symmetry. These have been additionally solved by the authors’ modification of the perturbation method that has been described in previous papers [7, 8, 10]. The electromagnetic field distribution obtained thereby has served as a referential result since it can obtain very accurate solutions [10]. Relative errors of electric and magnetic field strength are introduced to verify the results.
Źródło:
Archives of Electrical Engineering; 2013, 62, 1; 163-177
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Volume-spatial compositions of buildings poltava of the late nineteen – early twenty centuries
Autorzy:
Savchenko, Tetiana
Powiązania:
https://bibliotekanauki.pl/articles/1836688.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
three-dimensional composition
frontal construction
compositional scheme
Opis:
The article presents studies of the formation patterns of the buildings composition in Poltava in the late 19th – early 20th centuries. The main types of volume-spatial compositions and factors that influenced its formation are identified: urban (location in the system of urban development), and functional (typology of buildings). The means of organization of the volume-spatial structure of the buildings of Poltava have been studied.
Źródło:
Przestrzeń i Forma; 2020, 44; 143-162
1895-3247
2391-7725
Pojawia się w:
Przestrzeń i Forma
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 324

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