201. Why are the Early Gothic murals in St. Jacob’s Church in Ormož, Slovenia, almost entirely black?Anabelle Križnar, Katja Kavkler, Sabina Dolenec, 2024, izvirni znanstveni članek Povzetek: In St. Jacob’s parish church in Ormož, Slovenia, mural paintings from around 1350–1370 are partially conserved in the northeastern corner of the main nave. They are almost completely black, indicating a large-scale pigment degradation. They were studied as a part of a larger research project aiming to identify materials applied and their possible degradation. First, they were studied in situ, and next, extracted samples of plaster, pigments, and colour layers were analysed by optical microscopy, Raman spectroscopy, FTIR spectroscopy, SEM-EDS, and XRD. Haematite, green earth, malachite, azurite, and tenorite were identified, showing that azurite and perhaps also malachite degraded to black tenorite, probably due to their fine grinding and their application directly on the fresh plaster. The plaster is made with small and large amounts of aggregate with mostly quartz with some impurities, which makes it fragile. The original appearance of these murals was of bright blue and green colours.
Ključne besede: mural painting, medieval painting, Gothic art, St. Jacob's Church, Ormož, Slovenia, pigments, chemical structure, colour degradation, optical microscopy, Raman microspectroscopy, FTIR, XRD
Objavljeno v DiRROS: 17.04.2024; Ogledov: 101; Prenosov: 75
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202. Model uncertainty in a parametric fire curve approach : a stochastic correction factor for the compartment fire load densityFlorian Put, Andrea Lucherini, Bart Merci, Ruben Van Coile, 2024, izvirni znanstveni članek Povzetek: A commonly used approach to represent the thermal load in a compartment fire is the Eurocode Parametric Fire Curve (EPFC), which specifies gas temperatures (or rather adiabatic surface temperatures). Recognizing the significant deviations between real fires and the EPFC framework, the concept of model uncertainty is explored. This study does not aim to assess or improve the EPFC, but introduces a model uncertainty, allowing for reliability-based structural fire engineering (SFE). It presents a stochastic correction factor for the fire load density, based on the maximum temperature in steel sections. The focus is on the fire load density, but in general other parameters can be jointly taken into account as well. This correction factor considers protected and un- protected sections, incorporating variations in section factor and protection thickness. The findings reveal that the fire load density within the EPFC framework can be modified to better represent the severity of fire ex- periments. This approach ensures physical consistency of the obtained compartment gas temperatures, as opposed to alternative approaches for addressing the EPFC model uncertainty. While promising results are evident in this proof of concept, exploration for other types of structural elements and evaluation for structural systems is necessary before integration into design practices.
Ključne besede: structural fire engineering, compartment fires, fire load density, steel structures, reliability, probability of failure
Objavljeno v DiRROS: 17.04.2024; Ogledov: 73; Prenosov: 24
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203. Modelling intumescent coatings for the fire protection of structural systems : a reviewAndrea Lucherini, Donatella de Silva, 2024, pregledni znanstveni članek Povzetek: Purpose
Intumescent coatings are nowadays a dominant passive system used to protect structural materials in case of fire. Due to their reactive swelling behaviour, intumescent coatings are particularly complex materials to be modelled and predicted, which can be extremely useful especially for performance-based fire safety designs. In addition, many parameters influence their performance, and this challenges the definition and quantification of their material properties. Several approaches and models of various complexities are proposed in the literature, and they are reviewed and analysed in a critical literature review.
Design/methodology/approach
Analytical, finite-difference and finite-element methods for modelling intumescent coatings are compared, followed by the definition and quantification of the main physical, thermal, and optical properties of intumescent coatings: swelled thickness, thermal conductivity and resistance, density, specific heat capacity, and emissivity/absorptivity.
Findings
The study highlights the scarce consideration of key influencing factors on the material properties, and the tendency to simplify the problem into effective thermo-physical properties, such as effective thermal conductivity. As a conclusion, the literature review underlines the lack of homogenisation of modelling approaches and material properties, as well as the need for a universal modelling method that can generally simulate the performance of intumescent coatings, combine the large amount of published experimental data, and reliably produce fire-safe performance-based designs.
Research limitations/implications
Due to their limited applicability, high complexity and little comparability, the presented literature review does not focus on analysing and comparing different multi-component models, constituted of many model-specific input parameters. On the contrary, the presented literature review compares various approaches, models and thermo-physical properties which primarily focusses on solving the heat transfer problem through swelling intumescent systems.
Originality/value
The presented literature review analyses and discusses the various modelling approaches to describe and predict the behaviour of swelling intumescent coatings as fire protection for structural materials. Due to the vast variety of available commercial products and potential testing conditions, these data are rarely compared and combined to achieve an overall understanding on the response of intumescent coatings as fire protection measure. The study highlights the lack of information and homogenisation of various modelling approaches, and it underlines the research needs about several aspects related to the intumescent coating behaviour modelling, also providing some useful suggestions for future studies.
Ključne besede: intumescent coatings, fire protection, modelling, structural fire engineering, fire safety, performance-based design
Objavljeno v DiRROS: 17.04.2024; Ogledov: 118; Prenosov: 40
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204. Položaj priseljencev na področju zdravja in zdravstvenega varstva v SlovenijiRomana Bešter, Mojca Medvešek, Janez Pirc, 2020, samostojni znanstveni sestavek ali poglavje v monografski publikaciji Ključne besede: integracija priseljencev, priseljenci, zdravje, zdravstveno varstvo, Slovenija, integracijska politika
Objavljeno v DiRROS: 16.04.2024; Ogledov: 94; Prenosov: 26
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206. Razvoj integracijskih programov za priseljence v SlovenijiMojca Medvešek, Romana Bešter, Janez Pirc, 2020, samostojni znanstveni sestavek ali poglavje v monografski publikaciji Ključne besede: integracija, integracijska politika, integracijski programi, državljani držav nečlanic Evropske unije, začetna integracija priseljencev, slovenski jezik, Slovenija
Objavljeno v DiRROS: 16.04.2024; Ogledov: 102; Prenosov: 32
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207. The influence of cytokine gene polymorphisms on the risk of developing gastric cancer in patients with Helicobacter pylori infectionDavid Štubljar, Samo Jeverica, Tomislav Jukić, Miha Skvarč, Tadeja Pintar, Bojan Tepeš, Rajko Kavalar, Borut Štabuc, Alojz Ihan, 2015, izvirni znanstveni članek Ključne besede: cytokine gene, gastric cancer, Helicobacter pylori infection
Objavljeno v DiRROS: 16.04.2024; Ogledov: 93; Prenosov: 23
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208. The role of PET-CT in radiotherapy planning of solid tumoursStaša Jelerčič, Mirjana Rajer, 2015, pregledni znanstveni članek Povzetek: PET-CT is becoming more and more important in various aspects of oncology. Until recently it was used mainly as part of diagnostic procedures and for evaluation of treatment results. With development of personalized radiotherapy, volumetric and radiobiological characteristics of individual tumour have become integrated in the multistep radiotherapy (RT) planning process. Standard anatomical imaging used to select and delineate RT target volumes can be enriched by the information on tumour biology gained by PET-CT. In this review we explore the current and possible future role of PET-CT in radiotherapy treatment planning. After general explanation, we assess its role in radiotherapy of those solid tumours for which PET-CT is being used most. Conclusions. In the nearby future PET-CT will be an integral part of the most radiotherapy treatment planning procedures in an every-day clinical practice. Apart from a clear role in radiation planning of lung cancer, with forthcoming clinical trials, we will get more evidence of the optimal use of PET-CT in radiotherapy planning of other solid tumours.
Ključne besede: positron emission therapy, radiotherapy, radiotherapy planning, tumour biology
Objavljeno v DiRROS: 16.04.2024; Ogledov: 108; Prenosov: 27
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209. Analysis of risk factors for perifocal oedema after endovascular embolization of unruptured intracranial arterial aneurysmsSnezana Lukic, Slobodan Janković, Katarina Šurlan Popović, Dušan Dragič Banković, Peter Popović, Milan Mijailović, 2015, izvirni znanstveni članek Ključne besede: intracranial aneurysms, enovascular embolization, perianeurysmal oedema, hypertension
Objavljeno v DiRROS: 16.04.2024; Ogledov: 77; Prenosov: 27
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210. Enhancing balance in Parkinson’s disease patients : a comprehensive literature review on the efficacy of exercise in an enriched environmentAna Ponebšek, Friderika Kresal, Luka Šlosar, 2023, pregledni znanstveni članek Povzetek: Various physiotherapeutic methods and approaches play a significant role in the
treatment of patients with Parkinson’s disease, including the use of enriched environments. Virtual reality (VR) as a type of enriched environment has the potential to create
multiple sensory experiences and feedback, influencing various aspects of the patient’s
information processing and response. The suitability for home use and the considerable impact on motivation highlight its advantages over alternative approaches. The
objective of this review is to investigate the impact of VR-based exercise on balance
outcomes among individuals with Parkinson’s disease. The inclusion criteria consisted Parkinson’s disease. The comparable improvements in balance observed between the
experimental and control groups signify the potential effectiveness of VR-based exercises. This underscores the encouragement for further development in this technology,
particularly focusing on fully immersive VR environments, which may yield superior
effects in enhancing balance among individuals with Parkinson’s disease.
of randomized controlled trials (RCTs) that examined the effects of exercise in a VR
environment on individuals’ static and dynamic balance outcomes. In order to gather
relevant studies, we conducted a comprehensive search across three databases. From a
dataset of 625 records, we conducted a comprehensive full-text screening based on specific inclusion and exclusion criteria. This process resulted in the inclusion of 14 RCTs
in our review. The emerging evidence regarding exercising in a VR environment does
not definitively prove its superiority over standard exercise routines. However, studies
have demonstrated that both the experimental and control groups showed comparable improvements in enhancing static and dynamic balance among individuals with
Ključne besede: virtual reality, Parkinson's disease, balance, rehabilitation
Objavljeno v DiRROS: 16.04.2024; Ogledov: 89; Prenosov: 42
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