Iskanje po repozitoriju

A+ | A- | | SLO | ENG

Objavljeno v DiRROS: 07.05.2025; Ogledov: 498; Prenosov: 233
Celotno besedilo (5,79 MB)

Povzetek: Eno temeljnih vprašanje je, kdo naj bo odgovoren za zagotavljanje varnosti dohodka ob nastanku bolezni ali poškodbe. Oboje lahko predstavlja zasebno tveganje, za katerega je odgovorna oseba sama, njen delodajalec in zasebna zavarovanja, ali socialno tveganje, za katerega varnost zagotavljajo javni sistemi, predvsem sistem socialne varnosti, pa tudi občina in država neposredno. Naš zakonodajalec se je najprej lotil preureditve izvajanja zdravstvene dejavnosti, z namenom povečanja vseh vrst dostopnosti do zdravstvenih storitev in medicinskih stvari. Z vidika obveznega zdravstvenega zavarovanja se je torej najprej osredotočil na postopek uveljavljanja pravic, šele kasneje je predvidena dopolnitev obveznega zdravstvenega zavarovanja. To mora bolj podrobno urediti vsebinske pravice in nadzor nad njihovim uresničevanjem. Pri zakonskem urejanju je treba izhajati iz potreb pacientov in ne zgolj sistema zdravstvene dejavnosti ali njenih izvajalcev.
Ključne besede: zdravstvena dejavnost, mreža javne zdravstvene službe, izvajalec zdravstvene dejavnosti, izvajalec zdravstvenih storitev, obvezno zdravstveno zavarovanje
Objavljeno v DiRROS: 07.05.2025; Ogledov: 471; Prenosov: 150
Celotno besedilo (185,50 KB)

Povzetek: Although geographically well apart, there are interesting similarities between the ecosystems of the Sea of Marmara and the Adriatic Sea. In this study, following an evaluation of the ecological problems as well as oceanography, productivity, plankton biomass of these seas, macro-jellyfish ecology of the two ecosystems were discussed comparatively. The Sea of Marmara and the Adriatic Sea are among the areas where increases in jellyfish and mucilage events have been observed in recent decades. Environmental problems such as global warming, oxygen depletion, eutrophication, overfishing, intense maritime traffic, and habitat destruction are causing opportunistic and alien species to increase in both abundance and number of species. As biodiversity declines due to habitat destruction, so does the ecosystem’s means and ability to combat the invasion of alien species in both ecosystems. Accordingly, disruption of lower food chains can put pressure on the entire ecosystem and affect socio-ecological prospects. The number of species of Scyphozoa and Ctenophora was found to be higher in the Adraitic Sea compared to the Sea of Marmara. Mass occurrences with a clear seasonal pattern and related to the geographical location were observed for Aurelia aurita, Rhizostoma pulmo, Chrysaora hysoscella and non-native Mnemiopsis leidyi in the Marmara Sea. However, although A. aurita and R. pulmo show widespread blooms according to the seasons and regions in the Adriatic Sea, C. hysoscella and M. leidyi produced blooms limited to a few areas. Negative and positive interactions of macrojelyfishes with human were also considered. Semi-enclosed seas such as the Sea of Marmara and the Adriatic Sea are representative of many temperate coastal waters where climate change and anthropogenic stressors are increasing, and the ecosystem has changed from a fish-dominated to a jellyfish-dominated ecosystem.
Ključne besede: jellyfish, eutrophication, diversity, introduce, fisheries
Objavljeno v DiRROS: 07.05.2025; Ogledov: 579; Prenosov: 369
Celotno besedilo (3,51 MB)
Gradivo ima več datotek! Več...

Povzetek: The $\Delta$-edge stability number ${\rm es}_{\Delta}(G)$ of a graph $G$ is the minimum number of edges of $G$ whose removal results in a subgraph $H$ with $\Delta(H) = \Delta(G)-1$. Sets whose removal results in a subgraph with smaller maximum degree are called mitigating sets. It is proved that there always exists a mitigating set which induces a disjoint union of paths of order $2$ or $3$. Minimum mitigating sets which induce matchings are characterized. It is proved that to obtain an upper bound of the form ${\rm es}_{\Delta}(G) \leq c |V(G)|$ for an arbitrary graph $G$ of given maximum degree $\Delta$, where $c$ is a given constant, it suffices to prove the bound for $\Delta$-regular graphs. Sharp upper bounds of this form are derived for regular graphs. It is proved that if $\Delta(G) \geq\frac{|V(G)|-2}{3}$ or the induced subgraph on maximum degree vertices has a $\Delta(G)$-edge coloring, then ${\rm es}_{\Delta}(G) \le {\lceil |V(G)|/2\rceil}$.
Ključne besede: vertex degree, $\Delta$-edge stability number, matching, edge coloring
Objavljeno v DiRROS: 07.05.2025; Ogledov: 414; Prenosov: 214
Celotno besedilo (611,25 KB)
Gradivo ima več datotek! Več...

Povzetek: The maintenance of variation (i.e., different phenotypes) for heritable traits that are under selection, despite expectations of selection eroding variation and favouring only the fittest phenotype, represents an evolutionary paradox. Here, we studied variation in life-history traits in five populations of colour polymorphic tawny owls (Strix aluco) across Europe that have been individually studied for 13 years. Tawny owls show heritable plumage colour variation ranging from less pigmented (grey) to more heavily pigmented (brown-red). The breeding life span (BLS), lifetime egg production (LEP), lifetime reproductive success (LRS) and the number of years skipped between breeding attempts (NYS) varied between the study populations, with LEP and LRS varying across colour morphs in a population-specific fashion. Thus, grey tawny owl females have higher lifetime fledgling and egg production than brown-red females in some populations, but vice versa in others. Hence, our findings demonstrate disruptive selection of tawny owl plumage colourations across their European range, which may be one factor maintaining variation in heritable tawny owl colourations.
Ključne besede: colour polymorphism, fitness, geographical range, life-history traits, reproductive investment
Objavljeno v DiRROS: 07.05.2025; Ogledov: 413; Prenosov: 363
Celotno besedilo (828,83 KB)
Gradivo ima več datotek! Več...