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291.
Efficient open domination in graph products
Dorota Kuziak, Iztok Peterin, Ismael G. Yero, 2014, izvirni znanstveni članek

Opis: A graph ▫$G$▫ is an efficient open domination graph if there exists a subset ▫$D$▫ of ▫$V(G)$▫ for which the open neighborhoods centered in vertices of ▫$D$▫ form a partition of ▫$V(G)$▫. We completely describe efficient open domination graphs among lexicographic, strong, and disjunctive products of graphs. For the Cartesian product we give a characterization when one factor is ▫$K_2$▫.
Ključne besede: graph theory, efficient open domination, graph products, total domination
Objavljeno: 10.07.2017; Ogledov: 262; Prenosov: 40
.pdf Celotno besedilo (804,78 KB)
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292.
Linear recognition of generalized Fibonacci cubes $Q_h (111)$
Yoomi Rho, Aleksander Vesel, 2016, izvirni znanstveni članek

Opis: The generalized Fibonacci cube $Q_h(f)$ is the graph obtained from the $h$-cube $Q_h$ by removing all vertices that contain a given binary string $f$ as a substring. In particular, the vertex set of the 3rd order generalized Fibonacci cube $Q_h(111)$ is the set of all binary strings $b_1b_2 ... b_h$ containing no three consecutive 1’s. We present a new characterization of the 3rd order generalized Fibonacci cubes based on their recursive structure. The characterization is the basis for an algorithm which recognizes these graphs in linear time.
Ključne besede: graph theory, Fibonacci cubes, recognition algorithm
Objavljeno: 10.07.2017; Ogledov: 315; Prenosov: 52
.pdf Celotno besedilo (803,81 KB)
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293.
HRM model in tourism, based on Dialectical systems theory
Simona Šarotar Žižek, Sonja Treven, Matjaž Mulej, 2015, izvirni znanstveni članek

Opis: A human resources management (HRM) model integrating trends in HRM with trends in tourism into a dialectical system by the Dialectical Systems Theory (DST). HRM strategy, integrated within the tourism organization´s (TO´S) strategy is implemented through functional strategies helping their users to achieve a requisitely holistic (RH) HRM strategy replacing the prevailing one-sided ones. TO´S strategy covers: employees (1) planning, (2) acquisition and selection, (3) development and training, (4) diversity management, (5) teamwork and creativity, (6) motivation and rewarding, (7) stress reduction and health, (8) relationships, (9) personal holism, (10) well-being, (11) work and results assessment; etc. Everyone matters; their synergy is crucial. An innovated HRM model for TOs, which applies employees´, organizations´ RH and integrates new knowledge about HRM. HRM belongs to central managers´ tools. Their HRM must be adapted for TOs, where employees are crucial.
Ključne besede: tourism, human resources management, well-being, Dialectical Systems Theory, social responsibility, organizational cybernetics
Objavljeno: 13.07.2017; Ogledov: 309; Prenosov: 36
.pdf Celotno besedilo (126,73 KB)
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294.
Culture change in construction industry: from 2D toward BIM based construction
Nenad Čuš Babič, Danijel Rebolj, 2016, izvirni znanstveni članek

Opis: Building Information Modelling (BIM) has become accepted as an approach that should deliver substantial gains to all the stakeholders within the architecture, engineering and construction (AEC) industry. Recently, several researchers have pointed out the need for cultural changes as a necessary step for radically transforming the industry. In order to provide answers to these requests, the culture should be described in a more explicit way, and industry issues interpreted correctly. This paper via qualitative research of variety of sources explores the stability and persistence of a traditional 2D paper-based approach in the light of Institutional theory. The paper illustrates how the traditional approach is embedded within AEC culture by considering the regulative, normative, and cultural-cognitive aspects. These aspects support each other, thus providing even more stability and support for the existing values and ways of working. The aim of this work is to provide some insight into reasons for slower penetration of the BIM based construction. The paper also explains the local character of the industry, which slows down transference of best practices within the AEC industry. Understanding of existing patterns reveals new insights into how to make the transition easier and more functional, especially within the contexts of existing priorities and values.
Ključne besede: building information modelling, BIM, institutional theory, 2D paper based working
Objavljeno: 07.08.2017; Ogledov: 307; Prenosov: 45
.pdf Celotno besedilo (331,19 KB)
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295.
The number of moves of the largest disc in shortest paths on Hanoi graphs
Simon Aumann, Katharina Götz, Andreas Hinz, Ciril Petr, 2014, izvirni znanstveni članek

Opis: In contrast to the widespread interest in the Frame-Stewart conjecture (FSC) about the optimal number of moves in the classical Tower of Hanoi task with more than three pegs, this is the first study of the question of investigating shortest paths in Hanoi graphs ▫$H_p^n$▫ in a more general setting. Here ▫$p$▫ stands for the number of pegs and ▫$n$▫ for the number of discs in the Tower of Hanoi interpretation of these graphs. The analysis depends crucially on the number of largest disc moves (LDMs). The patterns of these LDMs will be coded as binary strings of length ▫$p-1$▫ assigned to each pair of starting and goal states individually. This will be approached both analytically and numerically. The main theoretical achievement is the existence, at least for all ▫$n \geqslant p(p-2)$▫, of optimal paths where ▫$p-1$▫ LDMs are necessary. Numerical results, obtained by an algorithm based on a modified breadth-first search making use of symmetries of the graphs, lead to a couple of conjectures about some cases not covered by our ascertained results. These, in turn, may shed some light on the notoriously open FSC.
Ključne besede: graph theory, Tower of Hanoi, Hanoi graphs, shortest paths, symmetries, breadth-first search
Objavljeno: 14.08.2017; Ogledov: 425; Prenosov: 32
.pdf Celotno besedilo (376,70 KB)
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296.
Roman domination number of the Cartesian products of paths and cycles
Polona Repolusk, Janez Žerovnik, 2012, izvirni znanstveni članek

Opis: Roman domination is a historically inspired variety of general domination such that every vertex is labeled with labels from $\{0,1,2\}$. Roman domination number is the smallest of the sums of labels fulfilling condition that every vertex, labeled 0, has a neighbor, labeled 2. Using algebraic approach we give ▫$O(C)$▫ time algorithm for computing Roman domination number of special classes of polygraphs (rota- and fasciagraphs). By implementing the algorithm we give formulas for Roman domination number of the Cartesian products of paths and cycles ▫$P_n \Box P_k$▫, ▫$P_n \Box C_k$▫ for ▫$k \leq 8$▫ and ▫$n \in {\mathbb N}$▫ and for ▫$C_n \Box P_k$▫ and ▫$C_n \Box C_k$▫ for ▫$k \leq 5$▫, ▫$n \in {\mathbb N}$▫. We also give a list of Roman graphs among investigated families.
Ključne besede: graph theory, Roman domination number, Cartesian product, polygraphs, path algebra
Objavljeno: 23.08.2017; Ogledov: 250; Prenosov: 35
.pdf Celotno besedilo (719,06 KB)
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297.
Altered Wiener indices
Damir Vukičević, Janez Žerovnik, 2005, izvirni znanstveni članek

Opis: Recently Nikolić, Trinajstić and Randić put forward a novel modification ▫$^mW(G)$▫ of the Wiener number ▫$W(G)$▫, called modified Wiener index, which definition was generalized later by Gutman and the present authors. Here we study another class of modified indices defined as ▫$W_{min,λ}(G) = ∑(V(G)^λm_G(u,ν)^λ−m_G(u,ν)^{2λ})$▫ and show that some of the important properties of ▫$W(G)$▫, ▫$^mW(G)$▫ and ▫$^λW(G)$▫ are also properties of ▫$W_{min,λ}(G)$▫, valid for most values of the parameter λ. In particular, if ▫$T_n$▫ is any n-vertex tree, different from the n-vertex path ▫$P_n$▫ and the n-vertex star ▫$S_n$▫, then for any λ ≥ 1 or λ < 0, ▫$^W_{min,λ}(P_n) > W_{min,λ}(T_n)>W_{min,λ}(S_n)$▫. Thus for these values of the parameter λ, ▫$W_{min,λ}(G)$▫ provides a novel class of structure-descriptors, suitable for modeling branching-dependent properties of organic compounds, applicable in QSPR and QSAR studies. We also demonstrate that if trees are ordered with regard to ▫$W_{min,λ}(G)$▫ then, in the general case, this ordering is different for different λ.
Ključne besede: mathematics, chemical graph theory, Wiener index, modified Wiener index
Objavljeno: 17.08.2017; Ogledov: 214; Prenosov: 44
.pdf Celotno besedilo (991,46 KB)
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298.
Omega polynomial revisited
Mircea V. Diudea, Sandi Klavžar, 2010, izvirni znanstveni članek

Opis: Omega polynomial was proposed by Diudea (Omega Polynomial, Carpath. J. Math., 2006, 22, 43-47) to count the opposite topologically parallel edges in graphs, particularly to describe the polyhedral nanostructures. In this paper, the main definitions are re-analyzed and clear relations with other three related polynomials are established. These relations are supported by close formulas and appropriate examples.
Ključne besede: mathematics, chemical graph theory, counting polynomials, Ommega polynomial, Theta polynomial, Pi polynomial, PI index, Sadhana polynomial, Cluj-Ilmenau index, CI index
Objavljeno: 24.08.2017; Ogledov: 211; Prenosov: 40
.pdf Celotno besedilo (263,85 KB)
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299.
Knowledge-cum-values management belongs to the way out from global crisis
Zdenka Ženko, Matjaž Mulej, Vojko Potočan, 2017, izvirni znanstveni članek

Opis: Background: The contemporary world-wide socio-economic crisis tends to escalate and contribute to the global crisis. Limitation of education to one-sided ‘knowledge management’ rather than socially responsible ‘knowledge-cum-values-management’ is one of the crisis’s causes. Objectives: The limitations to current knowledge management should be analyzed with systemic thinking. Which values are prevailing in it now and which values will enable the survival of humankind? Methods/Approach: In the first part, literature is reviewed for analysis and conceptual generalization of knowledge management. The theoretical framework based on ‘system theory’, ‘knowledge management’ and ‘knowledge-cum-values management’, and ‘values of social responsibility’ is introduced. In the second part a new theoretical concept “A potential methodological support for human transition from one-sided to requisitely holistic behavior via social responsibility” is discussed. Results: Knowledge management is a too narrow concept, it tends to leave aside human values, an impact on the natural environment, and extremely growing differences. Humankind needs consideration of responsibility, interdependence and holism in order to minimize detrimental impact of individual behaviour on society, i.e. humans and nature. Conclusions: The research indicates that individuals should attain more requisite holism, and should not be irrational by trying to attain only rationalism in human decision-making and action.
Ključne besede: knowledge-cum-values management, Dialectical Systems Theory, corporate social responsibility
Objavljeno: 31.08.2017; Ogledov: 286; Prenosov: 174
.pdf Celotno besedilo (241,28 KB)
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300.
The analysis of barriers in succession processes of family business with the use of grey incidence analysis (Polish Perspective)
Ewa Więcek-Janka, Rafał Mierzwiak, Joanna Kijewska, 2016, izvirni znanstveni članek

Opis: The article presents results of research on the identification and evaluation of barriers faced by successors in family businesses during the first process of succession. The analysis of empirical material used grey systems theory, which was considered as an equivalent for the analysis of small samples and qualitative research. While conducting the literature review and empirical study, the authors concentrated on (a) the identification of barriers in the development of family firms and (b) eliciting the perspective of the new generation of owners in family firms entering the succession process through an empirical analysis of the assessed level of risk in relationships with family and business.
Ključne besede: family business, company performance, business efficiency, leadership, ownership, family, risk, research, grey incidence analysis, grey system theory
Objavljeno: 14.11.2017; Ogledov: 456; Prenosov: 169
.pdf Celotno besedilo (695,38 KB)
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