61. Toward the first documented extinction of a marine macroalga in the Mediterranean Sea?Emmanuelle Patricia Descourvières, Vinko Bandelj, Adriano Sfriso, Martina Orlando-Bonaca, Vesna Mačić, Ljiljana Iveša, Silvija Kipson, Edi Gljušćić, Claudio Battelli, Isabella Moro, Cosimo Solidoro, Annalisa Falace, 2024, izvirni znanstveni članek Povzetek: Fucus virsoides is a glacial relict-species endemic to the Adriatic that was widespread from northern Italy to southern Albania. In recent decades, however, it has suffered an alarming decline. In this study, all available records were reviewed to reconstruct its historical and current occurrence and to investigate the possible causes of its decline. Comprehensive mapping revealed a continuing decline with a significant shift, leaving only about 20 fragmented populations. While the species is already classified as critically endangered in Albania, F. virsoides could be considered functionally extinct in Istria (Croatia), critically threatened with extinction in Italy and Montenegro and locally extinct in Slovenia. The status of the species in the rest of Croatia is still unclear. The remaining populations are located in areas characterised by low temperatures, low salinity and high nutrient concentrations. Long-term analyses of these key abiotic factors revealed profound changes that suggest a link to the species' decline. This study provides a thorough assessment of the overall status of F. virsoides and argues for its inclusion on the IUCN Red List. Immediate conservation measures are needed for the long-term survival of this species.
Ključne besede: Adriatic sea, endangered species, distribution, hydrobiology, marine biology
Objavljeno v DiRROS: 28.08.2024; Ogledov: 156; Prenosov: 363
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65. Role of isotropic lipid phase in the fusion of photosystem II membranesKinga Böde, Uroš Javornik, Ondřej Dlouhý, Ottó Zsiros, Avratanu Biswas, Ildikó Domonkos, Primož Šket, Václav Karlický, Bettina Ughy, Petar H. Lambrev, Vladimír Špunda, Janez Plavec, Győző Garab, 2024, izvirni znanstveni članek Objavljeno v DiRROS: 27.08.2024; Ogledov: 123; Prenosov: 151
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67. Graphs with total mutual-visibility number zero and total mutual-visibility in Cartesian productsJing Tian, Sandi Klavžar, 2024, izvirni znanstveni članek Povzetek: If $G$ is a graph and $X\subseteq V(G)$, then $X$ is a total mutual-visibility set if every pair of vertices $x$ and $y$ of $G$ admits a shortest $x,y$-path $P$ with $V(P) \cap X \subseteq \{x,y\}$. The cardinality of a largest total mutual-visibility set of $G$ is the total mutual-visibility number $\mu_{\rm t}(G)$ of $G$. Graphs with $\mu_{\rm t}(G) = 0$ are characterized as the graphs in which no vertex is the central vertex of a convex $P_3$. The total mutual-visibility number of Cartesian products is bounded and several exact results proved. For instance, $\mu_{\rm t}(K_n\,\square\, K_m) = \max\{n,m\}$ and $\mu_{\rm t}(T\,\square\, H) = \mu_{\rm t}(T)\mu_{\rm t}(H)$, where $T$ is a tree and $H$ an arbitrary graph. It is also demonstrated that $\mu_{\rm t}(G\,\square\, H)$ can be arbitrary larger than $\mu_{\rm t}(G)\mu_{\rm t}(H)$.
Ključne besede: mutual-visibility set, total mutual-visibility set, bypass vertex, Cartesian product of graphs, trees
Objavljeno v DiRROS: 26.08.2024; Ogledov: 134; Prenosov: 66
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68. Persistent homology with selective Rips complexes detects geodesic circlesŽiga Virk, 2024, izvirni znanstveni članek Povzetek: This paper introduces a method to detect each geometrically significant loop that is a geodesic circle (an isometric embedding of $S^1$) and a bottleneck loop (meaning that each of its perturbations increases the length) in a geodesic space using persistent homology. Under fairly mild conditions, we show that such a loop either terminates a 1- dimensional homology class or gives rise to a 2-dimensional homology class in persistent homology. The main tool in this detection technique are selective Rips complexes, new custom made complexes that function as an appropriate combinatorial lens for persistent homology to detect the above mentioned loops. The main argument is based on a new concept of a local winding number, which turns out to be an invariant of certain homology classes.
Ključne besede: simple closed geodesic, Rips complex, persistent homology, local winding number
Objavljeno v DiRROS: 26.08.2024; Ogledov: 140; Prenosov: 68
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69. Complexity of 2-rainbow total domination problemTadeja Kraner Šumenjak, Aleksandra Tepeh, 2024, izvirni znanstveni članek Povzetek: In this paper,we extend the findings of recent studies on $k$-rainbow total domination by placing our focus on its computational complexity aspects. We show that the problem of determining whether a graph has a $2$-rainbow total dominating function of a given weight is NP-complete. This complexity result holds even when restricted to planar graphs. Along the way tight bounds for the $k$-rainbow total domination number of rooted product graphs are established. In addition, we obtain the closed formula for the $k$-rainbow total domination number of the corona product $G ∗ H$, provided that $H$ has enough vertices.
Ključne besede: domination, rainbow domination, rooted product, NP-complete
Objavljeno v DiRROS: 26.08.2024; Ogledov: 139; Prenosov: 68
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70. The remedy for a world without transcendence : Georges Bataille on sacrifice and the theology of transgressionLuka Trebežnik, 2024, izvirni znanstveni članek Povzetek: Georges Bataille is undoubtedly a key reference for all relevant contemporary thoughts about sacrifice. This article attempts to follow his impulses and intuitions, which are often misunderstood because they are highly personal, provocative, and suggestive. The problem of sacrifice is approached in three concentric circles. The first presents a view from a distance, from the cosmic standpoint of “base materialism” and “general economy.” The second takes a closer look at the sacrificial site and deals with Bataille’s fascination with Aztec sacrificial culture. The concluding third part looks at sacrifice from the point of the altar, the place of communication and communal consumption of death, as a site of the emergence of the sacred and of community. In this way, the article seeks to highlight Bataille’s transgressive thinking as a worthwhile contribution to post-metaphysical theology.
Ključne besede: sacrifice, transgression, violence, sacred, communication, Aztecs, Bataille
Objavljeno v DiRROS: 26.08.2024; Ogledov: 123; Prenosov: 173
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