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Wyświetlanie 1-15 z 242
Tytuł:
Concepts Arising from Strong Efficient Domination Number. Part I
Autorzy:
Meena, N.
Gayathri, A.
Powiązania:
https://bibliotekanauki.pl/articles/1030980.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
domination
strong efficient bondage number
strong efficient domination
Opis:
Let G=(V,E) be a simple graph. A subset S of V(G) is called a strong (weak) efficient dominating set of G if for every v∈V(G),|N_s [v]∩S|=1.(|N_w [v]∩S|=1) , where N_s [v]={u∈V(G) ∶uv ∈E(G),deg〖u ≥degv 〗 }. (N_w [v]={u∈V(G) ∶uv ∈E(G), degv ≥degu The minimum cardinality of a strong (weak) efficient dominating set of G is called the strong (weak) efficient dominating set of G and is denoted by γ_se (G) (γ_we (G)). A graph G is strong efficient if there exists a strong efficient dominating set of G. The strong efficient bondage number b_se (G) of a non empty graph G is the minimum cardinality among all sets of edges X⊆E such that γ_se (G-X)>γ_se (G). In this paper, the strong efficient bondage number of some path related graphs and some special graphs are studied.
Źródło:
World Scientific News; 2020, 145; 342-353
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concepts Arising from Strong Efficient Domination Number. Part II
Autorzy:
Meena, N.
Priyanka, G. Jeba
Powiązania:
https://bibliotekanauki.pl/articles/1031591.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Domination
strong efficient domination
strong efficient non bondage number
Opis:
Let G = (V,E) be a simple graph. A subset S of V(G) is called a strong (weak) efficient dominating set of G if for every v∈V(G),|N_s [v]∩S|=1.( |N_w [v]∩S|=1), where〖 N〗_s (v)={u∈V(G):uv∈E(G),degu≥degv}(N_w (v){u∈V(G),uv∈E(G),degv≥degu}. The minimum cardinality of a strong (weak) efficient dominating set of G is called the strong (weak) efficient domination number of G and denoted by γ_se (G)(γ_we (G)). The strong efficient non bondage number b_sen (G) is the maximum cardinality of all sets of edge X⊆E such that γ_se (G-X) = γ_se (G). In this paper, the strong efficient non bondage number of some corona related graphs are studied.
Źródło:
World Scientific News; 2020, 146; 22-35
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strong Efficient Co-Bondage Number of Some Graphs
Autorzy:
Meena, N.
Vignesh, M. Madhan
Powiązania:
https://bibliotekanauki.pl/articles/1030836.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
domination
strong efficient co-bondage number
strong efficient domination
Opis:
Let G = (V, E) be a simple graph. A subset S of V(G) is called a strong (weak) efficient dominating set of G if for every v ∈ V(G), |N_s [v]∩ S|=1. (|N_w [v]∩ S|=1), where N_s (v) = {u ∈V(G) : uv∈ E(G), deg u ≥ deg v}. (N_w (v) = {u ∈V(G) : uv∈ E(G), deg v ≥ deg u}). The minimum cardinality of a strong (weak) efficient dominating set of G is called the strong (weak) efficient domination number of G and is denoted by γ_se(G) (γ_we(G)). A graph G is strong efficient if there exists a strong efficient dominating set of G. The strong efficient co-bondage number 〖bc〗_se(G) is the maximum cardinality of all sets of edges X ⊆ E such that γ_se (G+X) γ_se(G). In this paper, the strong efficient co-bondage number of some standard graphs and some special graphs are determined.
Źródło:
World Scientific News; 2020, 145; 234-244
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Concepts Arising from Strong Efficient Domination Number. Part – III
Autorzy:
Vignesh, M. Madhan
Meena, N.
Powiązania:
https://bibliotekanauki.pl/articles/1031631.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
domination
strong efficient co-bondage number
strong efficient domination
Opis:
Let G = (V, E) be a simple graph. A subset S of V(G) is called a strong (weak) efficient dominating set of G if for every v ∈ V(G), |N_s[] ∩ S|=1. (|N_w [] ∩ S|=1), where N_s () = {u ∈V(G) : uv ∈ E(G), deg u ≥ deg v}. (N_w () = {u ∈V(G) : uv ∈ E(G), deg v ≥ deg u}). The minimum cardinality of a strong (weak) efficient dominating set of G is called the strong (weak) efficient domination number of G and is denoted by γ_se(G) (γ_we(G)). A graph G is strong efficient if there exists a strong efficient dominating set of G. The strong efficient co-bondage number (G) is the maximum cardinality of all sets of edges X ⊆ E such that γ_se( + ) ≤ γ_se(G). In this paper, further results on strong efficient co-bondage number of some special graphs are determined.
Źródło:
World Scientific News; 2020, 146; 110-120
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient (j,k)-domination
Autorzy:
Rubalcaba, Robert
Slater, Peter
Powiązania:
https://bibliotekanauki.pl/articles/743411.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
efficient domination
multiple domination
Opis:
A dominating set S of a graph G is called efficient if |N[v]∩ S| = 1 for every vertex v ∈ V(G). That is, a dominating set S is efficient if and only if every vertex is dominated exactly once. In this paper, we investigate efficient multiple domination. There are several types of multiple domination defined in the literature: k-tuple domination, {k}-domination, and k-domination. We investigate efficient versions of the first two as well as a new type of multiple domination.
Źródło:
Discussiones Mathematicae Graph Theory; 2007, 27, 3; 409-423
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient structural forms as a result of architect and engineer collaboration
Autorzy:
Kozikowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/398452.pdf
Data publikacji:
2018
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
collaborative design
shaping forms
efficient structures
Opis:
Structure is an essential element of most architecture works, but beyond its main function to carry loads, it can also enrich and animate the architectural space. The architect, in cooperation with the engineer, may expand awareness of the architectural potential of the load-bearing system and design efficient structural forms that are based on the natural flow of forces and are simultaneously functional, unique, and aesthetic. The article shows how to design such forms and attempts to demonstrate that they can have a positive impact on the originality and beauty of an architectural object.
Źródło:
Architecturae et Artibus; 2018, 10, 2; 35-46
2080-9638
Pojawia się w:
Architecturae et Artibus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Changing Efficiency of the European Stock Markets
Autorzy:
Karasiński, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/957597.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
efficient markets hypothesis
evolving efficiency
stock markets
Opis:
The purpose of this article is to examine how the weak-form efficiency of the European stock markets has changed over the years. The study focuses its attention not on answering the question if the markets were efficient but on explaining how efficiency evolved. With a process based on the random walk model proposed by Louis Bachelier in 1900 still commonly applied in this research, market efficiency was examined using three different tests of the normality of the distribution for the returns of 20 selected European stock market indexes. The tests were performed for each year and for additional two-year sub-periods during the 20-year research period (1999–2018). Moreover, the tests were run for one-, two-, three- and four-day returns’ intervals. The study allowed for a partial rejection of the research hypothesis, finding that on a long-term basis the efficiency of European stock markets tends to improve. Indeed, the results indicate that overall efficiency tended to improve but only since the end of the 2008 global financial crisis. From the very beginning of the research period until 2008, overall efficiency was shown to decrease.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia; 2020, 54, 1; 41-51
0459-9586
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio H – Oeconomia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of Stochastic Dominance in Financial Analysis
Analiza efektywności dominacji stochastycznych w zastosowaniach finansowych
Autorzy:
Trzpiot, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/905072.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
asymmetric distribution
stochastic dominance criterion
efficient set
Opis:
Analiza portfelowa stawia problem wyboru najlepszego spośród możliwych losowych projektów inwestycyjnych. Wybór len zależy od, jedynej dla każdego inwestora, funkcji użyteczności oraz od rozkładu prawdopodobieństwa rozważanej inwestycji. W niniejszym opracowaniu skoncentrowano się na scharakteryzowaniu zbioru optymalnych efektywnych inwestycji. W odróżnieniu od zbioru efektywnych inwestycji zgodnego z kryterium momentów MV, zbiór efektywnych inwestycji zgodny z kryterium SD jest optymalny dla całych ogólnych klas funkcji użyteczności (nie tylko dla funkcji kwadratowej). Dodatkowo kryterium SD wykorzystuje wszystkie wartości rozkładu prawdopodobieństwa projektu inwestycyjnego. Wiele prac empirycznych omawia zależności pomiędzy zbiorem efektywnych inwestycji z kryterium momentów MV a zbiorem efektywnych inwestycji zgodnym z kryterium SD. W tym artykule przedstawione zostały wyniki analiz wybranych typów rozkładów asymetrycznych.
I ortfolio analysis can be regarded as a problem of choosing the best investment project from all possible investments. I his choice depends on, the unique for each investor, utility function and the distribution оf the return оГ the investment project. Unlike MV criterion, SD criterion is optimal for a class of utility function and additionally we elaborate with all value of the return of the investment project. We will present the results of analysis the properties ol the optimal efficient set according SD criteria for asymmetric distribution.
Źródło:
Acta Universitatis Lodziensis. Folia Oeconomica; 2005, 194
0208-6018
2353-7663
Pojawia się w:
Acta Universitatis Lodziensis. Folia Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the connectivity of efficient point sets
Autorzy:
Song, Wen
Powiązania:
https://bibliotekanauki.pl/articles/1339089.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
vector optimization
efficient point sets
density
connectivity
Opis:
The connectivity of the efficient point set and of some proper efficient point sets in locally convex spaces is investigated.
Źródło:
Applicationes Mathematicae; 1998-1999, 25, 1; 121-127
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polimorficzność motywacji osób twórczych. Implikacje pedagogiczne
Autorzy:
Bartnicka-Michalska, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/1789867.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
interpreting artist
efficient personality
polymorphism of motivation
Opis:
In the article the hypothesis of motivational polymorphism in creativity is formulated and confirmed. The hypothesis assumes that activation of creative behaviour needs many different types of motivation, which are variations of one main motivation. The theoretical basis of this article rests on Józef Kozielecki’s concept of psychotransgressionism, which assumes that creative behaviour can be activated by three motivations: self-esteem motivation (hubristic), motivation of the meaning of life and motivation of self-efficiency. In this study on a sample of interpreting artists (N = 133), creative behaviour was measured using the STZ questionnaire (Strzałecki 2003). The motivational orientations were measured using the Polish adaptation of Power Motivation Scale (PMS) by Tokarz and Trzebińska (2011), the Polish adaptation of Life Attitude Profile questionnaire (LAP-R) by Klamut (2010) and the Polish adaptation of General Self- Efficacy Scale questionnaire (GSES) by Juczyński (2001). The results confirmed the hypothesis of a polymorphic nature of motivation in creative people. Educational implications of results are discussed.
Źródło:
Kwartalnik Pedagogiczny; 2015, 60(3 (237)); 34-52
0023-5938
Pojawia się w:
Kwartalnik Pedagogiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biologically Inspired Energy Efficient Routing Protocol in Disaster Situation
Autorzy:
Chavan, Shankar D.
Thorat, Amruta S.
Gunjal, Monica S.
Vibhute, Anup S.
Desai, Kamalakar R.
Powiązania:
https://bibliotekanauki.pl/articles/2202999.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
WSN
ACO
AAR
path optimization
efficient routing
Opis:
Wireless sensor network (WSN) plays a crucial role in many industrial, commercial, and social applications. However, increasing the number of nodes in a WSN increases network complexity, making it harder to acquire all relevant data in a timely way. By assuming the end node as a base station, we devised an Artificial Ant Routing (AAR) method that overcomes such network difficulties and finds an ideal routing that gives an easy way to reach the destination node in our situation. The goal of our research is to establish WSN parameters that are based on the biologically inspired Ant Colony Optimization (ACO) method. The proposed AAR provides the alternating path in case of congestion and high traffic requirement. In the event of node failures in a wireless network, the same algorithm enhances the efficiency of the routing path and acts as a multipath data transmission approach. We simulated network factors including Packet Delivery Ratio (PDR), Throughput, and Energy Consumption to achieve this. The major objective is to extend the network lifespan while data is being transferred by avoiding crowded areas and conserving energy by using a small number of nodes. The result shows that AAR is having improved performance parameters as compared to LEACH, LEACH-C, and FCM-DS-ACO.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 1; 163--168
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rynki finansowe w warunkach ograniczonej racjonalności
Financial markets in the conditionsof bounded rationality
Autorzy:
Ambroziak, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/569972.pdf
Data publikacji:
2014
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
financial markets
bounded rationality
efficient market hypothesis
Opis:
In this paper an attempt was made to clarify the reasons of price movements on financial markets in the conditions of decision-makers bounded rationality. The emphasis of rationality of individuals, which is limited by information they have and the cognitive limitations of their minds, allowed to discuss the hypothesis of efficient markets and an assumption of their rational expectations. As a results of these considerations a model of financial markets was formulated in which an investor could choose different investment strategies and decide to change originally chosen ones as a consequence of their bounded rationality.
Źródło:
Ekonomia XXI Wieku; 2014, 3(3); 76-93
2353-8929
Pojawia się w:
Ekonomia XXI Wieku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polimorficzność motywacji osób twórczych. Implikacje pedagogiczne
Autorzy:
Aneta, Bartnicka-Michalska,
Powiązania:
https://bibliotekanauki.pl/articles/892405.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
interpreting artist
efficient personality
polymorphism of motivation
Opis:
In the article the hypothesis of motivational polymorphism in creativity is formulated and confirmed. The hypothesis assumes that activation of creative behaviour needs many different types of motivation, which are variations of one main motivation. The theoretical basis of this article rests on Józef Kozielecki’s concept of psychotransgressionism, which assumes that creative behaviour can be activated by three motivations: self-esteem motivation (hubristic), motivation of the meaning of life and motivation of self-efficiency. In this study on a sample of interpreting artists (N = 133), creative behaviour was measured using the STZ questionnaire (Strzałecki 2003). The motivational orientations were measured using the Polish adaptation of Power Motivation Scale (PMS) by Tokarz and Trzebińska (2011), the Polish adaptation of Life Attitude Profile questionnaire (LAP-R) by Klamut (2010) and the Polish adaptation of General Self- Efficacy Scale questionnaire (GSES) by Juczyński (2001). The results confirmed the hypothesis of a polymorphic nature of motivation in creative people. Educational implications of results are discussed.
Źródło:
Kwartalnik Pedagogiczny; 2015, 60(3 (237)); 34-52
0023-5938
Pojawia się w:
Kwartalnik Pedagogiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SCMNPs@Uridine/Zn: An efficient and reusable heterogeneous nanocatalyst for the rapid one-pot synthesis of tricyclic fused pyrazolopyranopyrimidine and 3-methyl carboxylate substituted pyrano[2,3-c]pyrazole derivatives under solvent-free conditions
Autorzy:
Wei, Jia
Gui, Wenjun
Cui, Yanjun
Zhang, Zhifang
Yousif, Qahtan A.
Powiązania:
https://bibliotekanauki.pl/articles/778587.pdf
Data publikacji:
2020
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
nanocatalyst
synthesis of tricyclic
carboxylate
efficient heterogeneous
Opis:
SCMNPs@Uridine/Zn is utilized as an environmental-friendly and efficient heterogeneous nanocatalyst for two one-pot four-component condensation reactions, containing hydrazine hydrate, arylaldehyde, ethyl acetoacetate, and barbituric acid to yield tricyclic fused pyrazolopyranopyrimidine derivatives (5a-q), and hydrazine hydrate, arylaldehyde, malononitrile, and dimethyl acetylenedicarboxylate/diethyl acetylenedicarboxylate to yield 3-methyl carboxylate substituted pyrano[2,3-c]pyrazole derivatives (8a-y) under solvent-free conditions with high to excellent yields. The main advantages of this process are easy work-up, short reaction times, no chromatographic purifications, and recyclability of the catalyst for a minimum of six runs without any signifcant decrease in yields of the products. Also, the prepared catalyst SCMNPs@Uridine/Zn was synthesized and fully characterized by various techniques including Fourier transform infrared spectroscopy (FT-IR), energy dispersive X-ray (EDX), thermogravimetric analysis (TGA), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and Raman spectroscopy.
Źródło:
Polish Journal of Chemical Technology; 2020, 22, 2; 20-33
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Psychological factors influence on energy efficiency in households
Autorzy:
Simanaviciene, Zaneta
Dirma, Virgilijus
Simanavicius, Arturas
Powiązania:
https://bibliotekanauki.pl/articles/18797266.pdf
Data publikacji:
2017
Wydawca:
Instytut Badań Gospodarczych
Tematy:
psychological factors
efficient use of electricity
households
Opis:
Research background: Most of the studies and their authors focus on the social and economic impacts of energy-saving behavior. However, they do not focus on the psychological factors affecting the efficiency of energy consumption in households. Lithuania has a lack of a unified and justified opinion on psychological factors that affect the energy efficiency of households. Purpose of the article: The main objective of the article is to identify the psychological factors that influence energy efficiency in households and to identify the appropriate measures to change the individual's energy consumption behavior. Methods: The article was based on analysis of scientific literature and expert evaluation, when experts selected the most influencing psychological factors. Expert valuation allowed to set the right conditions in which individuals are more easily assimilated by means of energy saving. Findings: In most cases, economic and technological factors significantly influence household energy consumption. Increased energy-efficient equipment production and supply is causing an energy consumption growth in households, because they are more inclined to buy and use more efficient electrical equipment. An investigation has showed that the energy consumption is strongly influenced by some cultural and psychological factors: with greater public openness to innovation, the households tend to use energy more efficiently. Also, some psychological indicators have significant impact on energy consumption has - frequently the more pronounced neuroticism or extraversion rate. Since the research was performed only in Lithuania, in the future it will seek to carry out an investigation in several countries and to compare a various factors on the proposed measures and the efficiency of household energy consumption.
Źródło:
Oeconomia Copernicana; 2017, 8, 4; 671-684
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 242

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