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Wyświetlanie 1-15 z 3480
Tytuł:
Balancing Bilinearly Interfering Elements
Autorzy:
Carfì, D.
Gambarelli, G.
Powiązania:
https://bibliotekanauki.pl/articles/375967.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
bargaining problems
game theory
antagonist elements
interfering elements
optimal dosage
synergies
Opis:
Many decisions in various fields of application have to take into account the joint effects of two elements that can interfere with each other. This happens, for example, in Medicine (synergic or antagonistic drugs), Agriculture (anti-cryptogamics), Public Economics (interfering economic policies), Industrial Economics (where the demand of an asset can be influenced by the supply of another asset), Zootechnics, and so on. When it is necessary to decide about the dosage of such elements, there is sometimes a primary interest for one effect rather than another; more precisely, it may be of interest that the effects of an element are in a certain proportion with respect to the effects of the other. It may also be necessary to take into account minimum quantities that must be assigned. In Carfì, Gambarelli and Uristani (2013), a mathematical model was proposed to solve the above problem in its exact form. In this paper, we present a solution in closed form for the case in which the function of the effects is bilinear.
Źródło:
Decision Making in Manufacturing and Services; 2015, 9, 1; 27-49
1896-8325
2300-7087
Pojawia się w:
Decision Making in Manufacturing and Services
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sur les elements bornants et les ideaux formes delements bornants joints dans les algebres bornologiques
Autorzy:
Zinedine, Ahmed
Tajmouati, Abdelaziz
Powiązania:
https://bibliotekanauki.pl/articles/746663.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
permanently singular elements, bounding elements, non-removable ideals, ideals consisting of joint bounding elements
Opis:
Bounding elements and ideals consisting of joint bounding elements were essential tools in the study of permanent singularity in the class of all bornological algebras ([1], [6], [7], [8] and [12]). In this paper we give some important properties of these two notions. Especially, we compare boundings elements with some similar known notions such as bornological divisors of zero and topological divisors of zero. Then we show that these elements can be seen as algebraic divisor of zero in some suitable extension of the initial algebra. This result is analogous to a well-known result of Żelazko [11] concerning topological divisors of zero in Banach algebras. Finaly, we show that a maximal ideal is a prime ideal among ideals consisting of joint bounding elements. This is analougous to the result given in [4] concerning ideals consisting of joint topological divisors of zero in the case of Banach algebras.
Źródło:
Commentationes Mathematicae; 2013, 53, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sulfur in railway elements
Autorzy:
Mikłaszewicz, I.
Czarnecki, M.
Powiązania:
https://bibliotekanauki.pl/articles/215627.pdf
Data publikacji:
2018
Wydawca:
Instytut Kolejnictwa
Tematy:
sulfur
Baumann test
railway elements
Opis:
The article presents the influence of sulfur as a harmful chemical element in railway elements working under load. The Baumann test shows the segregation of sulfur in the cross-section of the wheelset axle pivot, rail, wheel tyre and coupling elements. The tests were carried out in accordance with the standards PN-87/H-05414, ISO 4968:1979, PN EN 13674-1 + A1:2017, PN EN 13261: 2011, PN-84/H-84027/06, PN-EN 10083-3: 2006 and PN-EN 15566:2016-11, which require the determination of sulfur content and its distribution in those elements.
Źródło:
Problemy Kolejnictwa; 2018, 180; 101-104
0552-2145
2544-9451
Pojawia się w:
Problemy Kolejnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Banach *-algebras generated by semicircular elements induced by certain orthogonal projections
Autorzy:
Cho, I.
Jorgensen, P. E. T.
Powiązania:
https://bibliotekanauki.pl/articles/256025.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
free probability
orthogonal projections
weighted-semicircular elements
semicircular elements
Opis:
The main purpose of this paper is to study structure theorems of Banach *-algebras generated by semicircular elements. In particular, we are interested in the cases where given semicircular elements are induced by orthogonal projections in a C*-probability space.
Źródło:
Opuscula Mathematica; 2018, 38, 4; 501-535
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pre-assembly for FEM 2D non-curvilinear quadrilateral Lagrangian elements
Autorzy:
Sowa, M.
Typańska, D.
Powiązania:
https://bibliotekanauki.pl/articles/97541.pdf
Data publikacji:
2014
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
pre-assembly
finite element method
higher order elements
quadrilateral Lagrangian elements
Opis:
The paper concerns an idea of preparing auxiliary equations and data for the finite element method assembly. This is made for a specific element type and element order and is referred to as the pre-assembly. Most importantly the prepared auxiliary equations require that only the element’s placement (coordinates) needs to be known, while the remaining coefficients that are required are stored in data sheets. The pre-assembly allows programmers who implement the FEM to significantly reduce the effort put into the assembly algorithm through its replacement by a few simple equations and the application of the prepared data. These data sheets can be prepared and can be utilized by FEM programmers. The construction of these data sheets for non-curvilinear quadrilateral Lagrangian elements (of any selected order) is explained in this paper.
Źródło:
Computer Applications in Electrical Engineering; 2014, 12; 106-119
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phytoextraction of rare earth elements
Autorzy:
Gmur, Dominika
Siebielec, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2143646.pdf
Data publikacji:
2022-09
Wydawca:
Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:
rare earth elements
phytoextraction
hyperaccumulation
environmental remediation
Opis:
Rare earth elements (REE) are a group of 17 elements with similar physicochemical properties. Most of the world’s REE extraction belongs to China. Due to the growing demand for REE and limited resources, the European Commission has identified REE as critical materials. On the other hand, little is known so far about the possible effects of long-term exposure of living organisms and the ecosystem to REE. Therefore, potential solutions for the recovery of distributed REE are being sought. Phytoextraction is a method that allows the recovery of elements from the environment. For this purpose, two strategies are gener- ally used: the use of plants with the natural ability to accumulate REE (hyperaccumulators) and the support of the process through the use of chelators. Twenty two species have been identified as REE hyperaccumulators, e.g. Phytolacca americana, Dicranop- teris linearis, Blechnum niponicum or Carya tomentosa. For the total REE, an accumulation limit of 100 mg kg-1 dry weight was established. Natural chelators are used as additives, e.g. humic acids or low molecular weight acids, as well as synthetic ones: EDTA or EGTA. In addition, the efficiency of the process is also influenced by other factors, such as the sorption capacity of the soil, the content of organic matter in the soil or soil pH. The aim of this article is to present the plant species useful in REE phy- toextraction and the potential for enhancing the method with the use of chelators.
Źródło:
Polish Journal of Agronomy; 2022, 50; 3-11
2081-2787
Pojawia się w:
Polish Journal of Agronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vertical distribution patterns of trace and major elements within soil profile in Lithuania
Autorzy:
Gregorauskiene, V.
Kadunas, V.
Powiązania:
https://bibliotekanauki.pl/articles/2058924.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Lithuania
complete soil profile
accumulative elements
removable elements
total element contents
variability
Opis:
The vertical distribution of the total contents assayed by Dc-Arc ES analysis of 28 trace elements and 6 major elements measured by ICP-MS within 53 complete soil profiles in Lithuania are presented. Models of the soil profiles were created, each having the master soil horizons A, E, B and C. Median values of elements in the master horizons of different texture were used in place of missing samples, while aberrant samples were discarded. The absolute average deviation () was taken to measure the variability of the data subsets and thus to check the reliability of location of the element contents within the soil profile. Within the context of the different actions of the various soil-forming processes (podzolization, lessivage, gleyfication, humification and so on) the general patterns of vertical element distribution were revealed. Element depletion is dominant in the soils of Lithuania. Themost easily removed are the alkaline elements Ca and Mg, while U, B, Th, As, Co, Cr, Sr, Y, Mo, La, Sc, Yb, Ti, P and K are depleted through the whole soil profile. Ag, Pb, Sn and Mn were defined as the accumulative elements in the surface A-horizon and might be influenced by anthropogenic or biogenic processes. A relative accumulation of Zr, Ba and Nb was observed in the surface A-horizon, and this seems to be related to the weathering of resistant minerals. Levels of Fe, Li, Al, V, Zn, Ga, Ni, Cu and Rb were ascribed to elements precipitated in the soil illuvial B-horizon due to soil formation processes. Na, K, Sr, B, U, As, Co Rb and Yb were found to be the most immobile elements within typical soil profiles, while Ag, Zn, Sc, Ba, Cu, Zr, Fe La, Th and Ca are themostmobile elements and affected by a variety of natural and human factors.
Źródło:
Geological Quarterly; 2006, 50, 2; 229-237
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Culture-bound elements: Rendering and preserving in translation
Autorzy:
Maksvytytė, Jūratė
Powiązania:
https://bibliotekanauki.pl/articles/1191841.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Wrocławski. Oficyna Wydawnicza ATUT – Wrocławskie Wydawnictwo Oświatowe
Tematy:
culture-bound elements
translation
strategies
rendering
preserving
Opis:
Each culture is unique and has its own unique objects or phenomena related to its history, traditions, and cultural identity. These specific objects, otherwise called culture-bound elements, may be strange and unrecognizable to another culture. Translators are often challenged to translate the text of one culture to another and to convey the names of cultural elements, while still preserving their unique meaning, as well as their national and cultural colour. The aim of the article is to analyse the strategies and techniques by means of which the names of Lithuanian culture-bound elements are translated into English in a work devoted to public affairs. To what extent the original is preserved in the foreign-language environment clarifies the (dis)harmony. In short, the name of a culture-bound element is an integral part of such work that otherwise would not accomplish its purpose.
Źródło:
Studia Translatorica; 2019, 10; 253-264
2084-3321
2657-4802
Pojawia się w:
Studia Translatorica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Okresowy układ pierwiastków chemicznych
Periodic system of chemical elements
Autorzy:
Rurarz, E.
Powiązania:
https://bibliotekanauki.pl/articles/214493.pdf
Data publikacji:
2018
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
okresowy układ pierwiastków chemicznych
pierwiastki promieniotwórcze
pierwiastki super ciężkie
Międzynarodowa Unia Chemii Czystej i Stosowanej
periodic system of chemical elements
radioactive elements
super heavy elements
International Union of Pure and Applied Chemistry
Opis:
W roku bieżącym przypada 120. rocznica odkrycia polonu i radu. Liczby atomowe tych pierwiastków to odpowiednio: Z= 84 i Z=88. Dziś znamy 118 pierwiastków. W artykule przypomniano ważniejsze fakty z historii odkrycia nowych pierwiastków i badania ich właściwości. Szczególną uwagę poświęcono pierwiastkom promieniotwórczym z obszaru liczb atomowych Z= 104 -118, które odkryto w ostatnich kilkudziesięciu latach. Autor artykułu zwraca uwagę na złożoność i ważność procedur decydujących o ustalaniu nazwy nowych pierwiastków.
In the current year is 120. anniversary of the discovery of polonium and radium. Atomic numbers of these elements is: Z = 84 and Z = 88. Today we know the 118 elements. The article pointed out important facts from the history of the discovery of new elements and study their properties. Particular attention was given to radioactive elements with atomic numbers Z = 104-118, which was discovered in recent decades. The author of the article draws attention to the complexity and validity procedures for determining the names of new elements.
Źródło:
Postępy Techniki Jądrowej; 2018, 2; 37-40
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities of recovery and separation of rare earth elements
Autorzy:
Fila, Dominika
Powiązania:
https://bibliotekanauki.pl/articles/2079965.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
rare earth elements
resources
recovery
separation
Opis:
Rare earth metals are a group of elements widely used in high technology products. They are included in the group of critical mineral resources for the EU economy. Rare earth elements are found in computers and mobile phones, as well as in low-emission energy technologies. They are also applied in chemical processes as catalysts in the oil refining. Some of them occur even in considerable quantities in the earth's crust but not very often in the concentrations justifying the profitability of their extraction. Additionally, the constantly growing demand and the current market situation cause that alternative resources of rare earth elements recovery are sought after. Therefore, the recovery and separation methods as well as recovery from the secondary sources are becoming more and more important. The following paper presents the possibilities of recovery and separation of rare earth elements from primary and secondary sources.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2018, 73, 1; 99-110
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustical Boundary Elements : Theory and Virtual Experiments
Autorzy:
Piscoya, R.
Ochmann, M.
Powiązania:
https://bibliotekanauki.pl/articles/178118.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
boundary elements
Green's functions
non-uniqueness
Opis:
This paper presents an overview of basic concepts, features and difficulties of the boundary element method (BEM) and examples of its application to exterior and interior problems. The basic concepts of the BEM are explained firstly, and different methods for treating the non-uniqueness problem are described. The application of the BEM to half-space problems is feasible by considering a Green’s Function that satisfies the boundary condition on the infinite plane. As a special interior problem, the sound field in an ultrasonic homogenizer is computed. A combination of the BEM and the finite element method (FEM) for treating the problem of acoustic-structure interaction is also described. Finally, variants of the BEM are presented, which can be applied to problems arising in flow acoustics.
Źródło:
Archives of Acoustics; 2014, 39, 4; 453-465
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minkowski difference and Sallee elements in an ordered semigroup
Autorzy:
Borowska, Danuta
Grzybowski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/745931.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Minkowski difference
Sallee elements
semigroups
Opis:
In the manner of Pallaschke and Urbański ([5], chapter 3) we generalize the notions of the Minkowski difference and Sallee sets to a semigroup. Sallee set (see [7], definition of the family \(S\) on p. 2) is a compact convex subset \(A\) of a topological vector space \(X\) such that for all subsets \(B\) the Minkowski difference \(A -B\) of the sets \(A\) and \(B\) is a summand of \(A\). The family of Sallee sets characterizes the Minkowski subtraction, which is important to the arithmetic of compact convex sets (see [5]). Sallee polytopes are related to monotypic polytopes (see [4]). We generalize properties of Minkowski difference and Sallee sets to semigroup and investigate the families of Sallee elements in several specific semigroups.
Źródło:
Commentationes Mathematicae; 2007, 47, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Semicircular elements induced by p-adic number fields
Autorzy:
Cho, I.
Jorgensen, P. E. T.
Powiązania:
https://bibliotekanauki.pl/articles/255340.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
free probability
primes
p-adic number fields Qp
Hilbert-space representations
C*-algebras
wighted-semicircular elements
semicircular elements
Opis:
In this paper, we study semicircular-like elements, and semicircular elements induced by p-adic analysis, for each prime p. Starting from a p-adic number field Qp, we construct a Banach *-algebra [formula], for a fixed prime p, and show the generating elements Qpj of [formula] form weighted-semicircular elements, and the corresponding scalar-multiples Θpj of Qpj become semicircular elements, for all j ∈ Z. The main result of this paper is the very construction of suitable linear functionals [formula] on [formula], making Qpj be weighted-semicircular, for all j ∈ Z.
Źródło:
Opuscula Mathematica; 2017, 37, 5; 665-703
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prognosis of environmental impact of trace elements from brown coal-fired power plant Bełchatów
Autorzy:
Konieczyński, J.
Komosiński, B.
Jabłońska, M.
Cieślik, E.
Powiązania:
https://bibliotekanauki.pl/articles/204574.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
environment protection
brown coal
trace elements
combustion products
fl ue gas desulphurization (FGD) gypsum
forecast of trace elements emission
forecast of trace elements transfer
Opis:
A forecast of the negative impact exerted on the environment by selected trace elements in "Bełchatów" Power Plant has been prepared on the basis of the results of investigations into these elements’ distribution carried out as part of earlier research on coal from “Bełchatów” Field and the data on updated analyses of the content of these elements in 55 brown coal samples from test boreholes. Work in "Bełchatów" Power Plant, which is supplied with coal from "Szczerców" Field, will be accompanied by trace elements transfer. On the basis of the conducted investigations it has been found that the biosphere is most threatened by mercury emissions. As shown by the presented results of analyses and calculations, the emissions of mercury in "Bełchatów" Power Plant are low. Mercury is accumulated chiefly in gypsum produced in the FGD plant. The content of mercury in slag and ash is low.
Źródło:
Archives of Environmental Protection; 2012, 38, 3; 59-72
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 3480

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