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Povzetek: Interfacing ferromagnetic metals with organic molecules is a versatile strategy to control key parameters in magnetic and spintronic technologies. Hybridization between the metal’s surface d orbitals and molecular p orbitals profoundly alters both the interfacial molecular layer and adjacent metal interface atomic layers, causing substantial changes in the magnetic properties of metal/molecule heterostructures. While magnetic modifications within the metallic layer are relatively well understood, the interfacial magnetism remains elusive. Using ultrafast time-resolved magneto-optical spectroscopy, we investigate the magnetic dynamics in such heterostructures and identify a distinct interfacial magnetic component that appears universal across various cobalt/molecule combinations. Our findings reveal a highly anisotropic magnetic layer localized at the interface, which has remained undetected in static measurements. This interfacial layer likely originates from strong chemical modifications in the cobalt surface induced by chemisorbed molecules. These results underscore the crucial role of molecular chemisorption in shaping interfacial magnetic properties, offering further opportunities for tuning functionalities in molecule-based spintronic devices.
Ključne besede: magnetism
Objavljeno v DiRROS: 19.08.2025; Ogledov: 298; Prenosov: 209
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Povzetek: By the Lindeberg–Lévy central limit theorem, standardized partial sums of a sequence of mutually independent and identically distributed random variables converge in law to the standard normal distribution. It is known that mutual independence cannot be relaxed to pairwise independence, nor even to triplewise independence. Counterexamples have been constructed for most marginal distributions: a recent construction works under a condition which excludes certain probability distributions with atomic parts, in particular almost all distributions on a fixed finite set. In the present paper, we show that this condition can be lifted: for any probability distribution $F$ on the real line, which has finite variance and is not concentrated in a single point, there exists a sequence of triplewise independent random variables with distribution $F$, such that its standardized partial sums converge in law to a distribution which is not normal. There is also scope for extension to $k$-tuplewise independence.
Ključne besede: central limit theorem, mutual independence, triplewise independence
Objavljeno v DiRROS: 18.08.2025; Ogledov: 305; Prenosov: 152
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Ključne besede: pigs, autochthonous breed, fitness, heterozygosity-rich regions, runs of heterozygosity, Sus scrofa
Objavljeno v DiRROS: 18.08.2025; Ogledov: 393; Prenosov: 221
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Ključne besede: human diet, edible insects, demographic inference, insect breeding, population management, farming insects, review, selection cheme, human nutrition
Objavljeno v DiRROS: 18.08.2025; Ogledov: 397; Prenosov: 286
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Povzetek: Anthropogenic litter causes significant harm to the environment on a global scale. Achieving international agreements and es-tablishing corresponding national legislation is essential for solving this prevalent environmental problem. Effective monitoringprogrammes are also critical for evaluating the environmental status in aquatic (marine and freshwater) environments, as re-quired by the Water Framework Directive (WFD) and the Marine Strategy Framework Directive (MSFD) in Europe. In contrastto the MSFD, the current version of the WFD does not yet include anthropogenic litter pollution as an indicator to evaluate thestatus of aquatic environments. In order to overcome these shortcomings, we recommend using existing litter data generated bycitizen science initiatives as a baseline to establish relevant indicators in the WFD. Further, citizen scientists could contribute tothe WFD by taking complimentary samples, for example, at underrepresented smaller streams, adding context and value to datacollected at established monitoring stations. The involvement of citizens as actors within an EU Directive would not only help toobtain valuable data on a significant spatial and temporal scale but could potentially also increase the environmental awarenessand political engagement of the public. The upcoming revision cycle of the WFD in 2028 presents a unique opportunity to givecitizens a voice and opportunity to partake in EU legislative frameworks.
Ključne besede: anthropogenic litter, citizen science, EU legislation participation, plastic pollution, Water Framework Directive (WFD)
Objavljeno v DiRROS: 18.08.2025; Ogledov: 378; Prenosov: 208
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