Digital repository of Slovenian research organizations
Not a member yet
17604 research outputs found
Sort by
Microwaves assisted synthesis of IrRu alloy nanoparticles for acidic oxygen evolution reaction: a balance between activity and stability
Get PDFUnder the background of renewable hydrogen generation through proton exchange membrane water electrolysis, here we report highly efficient and stable iridium (Ir) and ruthenium (Ru) alloy based electrocatalysts for the acidic OER. The electrocatalysts were synthesized by a facile microwave-assisted sodium borohydride (MW-NaBH4) reduction method with 98 % reaction conversion efficiency. The ultrafine IrRu alloy nanoparticles have shown transfer of electron from Ru to Ir and d-band structure modification. Benefiting from the electron transfer between the active metals, the synthesized electrocatalysts have exhibited superior OER performance in acidic electrolyte. Among the combinations, the Ir-Ru (30:70) demonstrated mass activity as high as 481 A g−1 and requiring overpotential of 270 mV to deliver a current density of 10 mA cm−2, better performance compared to other synthesized and commercial electrocatalyst. Further, Ir-Ru (50:50) have exhibited the best OER performance of 425 A g−1 mass activity, double to that of commercial IrO2 and retained around 50 % of their initial current density (IrO2 remains only 31 %) in long-term AST tests. Based on the solution electrochemical performance such as low overpotential (310 mV vs. 330 for IrO2), high mass activity and long-term stability the Ir-Ru (50:50) alloy combination can be considered a promising electrocatalyst for PEMWE applications
A representation learning approach to feature drift detection in wireless networks
Get PDFArtificial Intelligence (AI) is foreseen to be a centerpiece in next generation wireless networks enabling ubiquitous communication as well as new services. However, in real deployment, feature distribution changes may degrade the performance of Artificial Intelligence (AI) models and lead to undesired behaviors. To counter for undetected model degradation, we propose ALERTa method that can detect feature distribution changes and trigger model re-training that works well on two wireless network use cases: wireless fingerprinting and link anomaly detection. ALERT includes three components: representation learning, statistical testing and utility assessment. We rely on Multi-layer Perceptron (MLP) for designing the representation learning component, on Kolmogorov-Smirnov (KS) and Population Stability Index (PSI) tests for designing the statistical testing and a new function for utility assessment. We show the superiority of the proposed method against ten standard drift detection methods available in the literature on two wireless network use cases
Effects of a LaNaY catalyst on the pyrolysis product distribution and reaction mechanism of oil-prone coal
Get PDF
Polisemija agentivnyh suffiksov v slavjanskih jazykah
Get PDFPrispevek analizira večpomenskost priponskih obrazil s pomenom AGENT v šestih slovanskih jezikih (ruščini, ukrajinščini, poljščini, češčini, srbščini in slovenščini) z uporabo »metonimičnega« pristopa k besedotvorju, ki ga je razvila L. Janda (2011). Obravnavamo pomenske značilnosti glagolov, ki se jim lahko dodajajo priponska obrazila s pomenom AGENT, in opisujemo pomenske tipe, ki jih predstavljajo samostalniške izpeljanke. Pokažemo, da priponska obrazila s pomenom AGENT služijo za tvorbo samostalnikov, ki pripadajo širokemu spektru kategorij, razen AGENT, tvorbo teh samostalnikov pa je mogoče analizirati skozi prizmo metonimičnih prenosov.This article analyses the polysemy of agent noun suffixes in six Slavic languages (Russian, Ukrainian, Polish, Czech, Serbian, and Slovenian) by using the “metonymic” approach to word formation developed by Laura Janda (2011). It discusses the semantic features of verbs that agentive suffixes can be attached to, and it describes the semantic types represented by the derived nouns. It is demonstrated that agentive suffixes serve to form nouns that belong to a broad range of categories other than agent, and that the formation of these nouns can be analyzed through the lens of metonymy patterns
Anizotropni razvoj mikrostrukture na ravninah (001), (110) in (111) v monokristalni superzlitini tipa SRR99
Get PDFDesign and Construction of the Corpus of Scientific Texts of Contemporary Slovenian
Get PDFV prispevku predstavljamo Korpus znanstvenih besedil sodobne slovenščine, specializirani pisni korpus slovenščine, ki obsega 33.604.256 pojavnic iz 884 znanstvenih in strokovnih besedil zlasti s področij družboslovja in humanistike, nastalih predvsem med letoma 2000 in 2023. Osredotočamo se na prikaz besedilnotipske sestave korpusa, tehničnih postopkov predpriprave korpusnih besedil, korpusne anotacije, formatov zapisa korpusnih besedil in dostopnosti korpusa. Predstavljamo tudi motivacijo za izgradnjo korpusa in njegovo aplikativno vrednost, pri čemer skušamo opredeliti specifike in prednosti Korpusa znanstvenih besedil sodobne slovenščine glede na druge slovenske korpuse, ki vključujejo strokovna in znanstvena besedila.This paper presents the Corpus of Scientific Texts of Contemporary Slovenian, a specialized written corpus of Slovenian comprising 33,604,256 tokens from 884 scientific and expert texts, primarily in the fields of social sciences and the humanities, published mainly between 2000 and 2023. We focus on describing the text-type composition of the corpus, the technical procedures used in the preprocessing of corpus texts, corpus annotation, text encoding formats and corpus accessibility. We also discuss the rationale for constructing the corpus and its practical applications, aiming to outline the specific characteristics and advantages of the Corpus of Scientific Texts of Contemporary Slovenian in comparison with other Slovenian corpora that include specialized texts
Assessing the role of recycled tyre polymer fibres (RTPFs) on the key hydration processes governing autogenous shrinkage
Get PDFThe incorporation of recycled tyre polymer fibres (RTPF) in cementitious composites provides an effective and sustainable approach in tyre waste management while offering potential benefits in mitigating early-age volume deformations. This study evaluates the influence of RTPFs, used in dry (RTPFd) and pre-wetted (RTPFw) states, on key hydration processes governing autogenous shrinkage in cement pastes with w/c of 0.4 and 0.22. The results show that RTPF reduced workability and altered the setting process due to the fibre–matrix mechanical interactions. Incorporation of RTPFs induced changes in water distribution at the fibre surface, delaying self-desiccation and maintaining higher internal relative humidity. While RTPFs offer a beneficial reduction in autogenous shrinkage by 12–41% in mixtures with w/c of 0.4 and by 15–34% in mixtures with w/c of 0.22, RTPFs also increased porosity, which contributed to a reduction in 28-day compressive strength of up to 16%. These findings highlight the dual effect of RTPF on early-age performance and provide insight into their potential application in sustainable cementitious composites