1. Plants in danger : floral and other plant traits as drivers of vulnerability in Mediterranean countriesAmparo Lázaro, Anastasia Stefanaki, Martha Charitonidou, Joana Cursach, Maria Panitsa, Ioannis Bazos, Rosa Ranalli, Mauro Fois, Marta Galloni, Gianluigi Bacchetta, Živa Fišer, 2026, izvirni znanstveni članek Opis: Plants with complex floral morphologies are adapted to be pollinated by restricted pollinator assemblages and may suffer pollinator limitation. Understanding how floral traits and other variables relate to plant vulnerability can provide a powerful tool for predicting the conservation status and prioritizing the assessment of plants with scarce field data. Using circa 3000 records of rare and threatened (sensu IUCN) entomophilous plant taxa from seven Mediterranean countries, we evaluated how six floral traits and other eight intrinsic and extrinsic variables were related to plant vulnerability (less vs. more threatened plants). Besides, we analyzed 29 experts' opinions regarding the floral traits most related to floral complexity. Floral shape, reproductive unit, and flowering duration were good vulnerability indicators. Taxa with lip- and flag-shaped flowers were the most threatened, which agrees with the opinion of experts who considered lip- and flag-shaped flowers to have more complex morphologies. Also, plants with cylindrical inflorescences or solitary flowers were more threatened than those with flat-spherical inflorescences; and longer flowering durations reduced the probability of being threatened. Regarding extrinsic variables, coastal and freshwater habitats, i.e. habitats heavily impacted by human activities, had the highest percentage of highly threatened taxa. Yet, plant vulnerability decreased with maximum elevation and total distribution range. These results may serve as a basis for managers and practitioners when field data are scarce or unavailable, so that, depending on their traits, species could be provisionally listed in Red Lists as deserving priority for assessment to ascertain conservation status and actions.
Ključne besede: floral complexity, floral shape, flowering duration, functional reproductive unit, plant conservation, red data books, threatened Mediterranean vascular flora
Objavljeno v RUP: 02.12.2025; Ogledov: 237; Prenosov: 3
 Celotno besedilo (5,45 MB)
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2. Passing from plat closure to standard closure of braids in R^3, in handlebodies and in thickened surfacesPaolo Cavicchioli, Sofia Lambropoulou, 2025, izvirni znanstveni članek Opis: Given a knot or link in the form of plat closure of a braid, we describe an algorithm to obtain a braid representing the same knot or link with the standard closure, and vice-versa. We analyze the three cases of knots and links in ℝ^3, in handlebodies and in thickened surfaces, and we give for each one a detailed construction of the relative algorithm, with proofs of the results and the calculation of the computational complexity. Indeed, we show that the algorithm has quadratic computational complexity in the number of crossings and loop generators of the braid when passing from plat to standard closure, while it has linear computational complexity in the number of crossings generators of the braid when passing from standard to plat closure. The article includes numerous illustrations to facilitate the understanding of the results, as well as an example of implementation of the algorithm for the general case.
Ključne besede: standard closure of braids, plat closure of braids, classical knots and links, knots and links in the handlebody, knots and links in thickened surfaces, algorithms and complexity
Objavljeno v RUP: 03.11.2025; Ogledov: 299; Prenosov: 2
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4. Systems approach to cultural tourism and eventsTadeja Jere Jakulin, 2019, izvirni znanstveni članek Opis: In this paper, we will present the systems approach methodology, which has been widely used in the natural sciences and engineering for the last seven decades since Ludwig von Bertalanffy published his manifesto on general systems theory (1952) and Norbert Wiener his on cybernetics (1948). The intention of general systems theory and cybernetics is the "ontology" of action, which is shown by feedback information. Its goal is to find a method to predict the consequence of a decision-making action. Industrial engineering recognised it when Forrester published Industrial Dynamics (1961), and social sciences rediscovered it with Senge`s work on the learning organisation The Fifth Discipline (1990). Cultural tourism is an element of a complex tourism system within global and local dimensions, in which cultural events, as even smaller elements, play essential roles within the range of tourism goods and services. As a methodology for the research of complex phenomena, the systems approach will explain two of its methods, systems thinking and modelling, as those that can significantly influence decision-making when taken into account.We will show the appropriateness of the methodology within cultural tourism decision-making and modelling.
Ključne besede: systems approach, analytical and systems thinking, complexity, cultural tourism and events, modelling
Objavljeno v RUP: 30.11.2021; Ogledov: 2379; Prenosov: 26
Celotno besedilo (1,71 MB) |
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6. On girth and the parameterized complexity of token sliding and token jumpingValentin Bartier, Nicolas Bousquet, Clément Jean Dallard, Kyle Lomer, Amer E. Mouawad, 2021, izvirni znanstveni članek Ključne besede: combinatorial reconfiguration, independent set, token jumping, token sliding, parameterized complexity
Objavljeno v RUP: 16.07.2021; Ogledov: 2363; Prenosov: 31
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7. On girth and the parameterized complexity of token sliding and token jumpingValentin Bartier, Nicolas Bousquet, Clément Jean Dallard, Kyle Lomer, Amer E. Mouawad, 2020, objavljeni znanstveni prispevek na konferenci Ključne besede: combinatorial reconfiguration, independent set, token jumping, token sliding, parameterized complexity
Objavljeno v RUP: 17.12.2020; Ogledov: 2546; Prenosov: 35
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8. Scaffolding problems revisited : complexity, approximation and fixed parameter tractable algorithms, and some special casesMathias Weller, Annie Chateau, Clément Jean Dallard, Rodolphe Giroudeau, 2018, izvirni znanstveni članek Ključne besede: complexity, approximation, lower bound, kernel, scaffolding, {ISK4, wheel}-free graph
Objavljeno v RUP: 11.02.2020; Ogledov: 2922; Prenosov: 65
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