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Characterization of hFOB 1.19 cell line for studying Zn-based degradable metallic biomaterials
Eva Jablonská, Lucie Mrázková, Jiří Kubásek, Dalibor Vojtěch, Irena Paulin, Tomáš Ruml, Jan Lipov, 2024, izvirni znanstveni članek

Povzetek: In vitro testing is the first important step in the development of new biomaterials. The human fetal osteoblast cell line hFOB 1.19 is a very promising cell model; however, there are vast discrepancies in cultivation protocols, especially in the cultivation temperature and the presence of the selection reagent, geneticin (G418). We intended to use hFOB 1.19 for the testing of Zn-based degradable metallic materials. However, the sensitivity of hFOB 1.19 to zinc ions has not yet been studied. Therefore, we compared the toxicity of zinc towards hFOB 1.19 under different conditions and compared it with that of the L929 mouse fibroblast cell line. We also tested the cytotoxicity of three types of Zn-based biomaterials in two types of media. The presence of G418 used as a selection reagent decreased the sensitivity of hFOB 1.19 to Zn2+. hFOB 1.19 cell line was more sensitive to Zn2+ at elevated (restrictive) temperatures. hFOB 1.19 cell line was less sensitive to Zn2+ than L929 cell line (both as ZnCl2 and extracts of alloys). Therefore, the appropriate cultivation conditions of hFOB 1.19 during biomaterial testing should be chosen with caution.
Ključne besede: zinc degradable materials, in vitro cytotoxicity testing, hFOB 1.19 osteoblasts
Objavljeno v DiRROS: 28.02.2024; Ogledov: 76; Prenosov: 37
.pdf Celotno besedilo (1,81 MB)
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Grain size distribution of DP 600 steel using single-pass asymmetrical wedge test
Urška Klančnik, Peter Fajfar, Jan Foder, Heinz Palkowski, Jaka Burja, Grega Klančnik, 2023, izvirni znanstveni članek

Ključne besede: wedge test, hot-rolling, grain size distribution, dual-phase steel
Objavljeno v DiRROS: 07.02.2024; Ogledov: 130; Prenosov: 52
.pdf Celotno besedilo (4,64 MB)
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Vehicle–bridge interaction modelling using precise 3D road surface analysis
Maja Kreslin, Peter Češarek, Aleš Žnidarič, Darko Kokot, Jan Kalin, Rok Vezočnik, 2024, izvirni znanstveni članek

Povzetek: Uneven road surfaces are the primary source of excitation in the dynamic interaction between a bridge and a vehicle and can lead to errors in bridge weigh-in-motion (B-WIM) systems. In order to correctly reproduce this interaction in a numerical model of a bridge, it is essential to know the magnitude and location of the various roadway irregularities. This paper presents a methodology for measuring the 3D road surface using static terrestrial laser scanning and a numerical model for simulating vehicle passage over a bridge with a measured road surface. This model allows the evaluation of strain responses in the time domain at any bridge location considering different parameters such as vehicle type, lateral position and speed, road surface unevenness, bridge type, etc. Since the time domain strains are crucial for B-WIM algorithms, the proposed approach facilitates the analysis of the different factors affecting the B-WIM results. The first validation of the proposed methodology was carried out on a real bridge, where extensive measurements were performed using different sensors, including measurements of the road surface, the response of the bridge when crossed by a test vehicle and the dynamic properties of the bridge and vehicle. The comparison between the simulated and measured bridge response marks a promising step towards investigating the influence of unevenness on the results of B-WIM.
Ključne besede: interakcija vozilo in most, terestično lasersko skeniranje, neravnost vozišča, numerično modeliranje
Objavljeno v DiRROS: 26.01.2024; Ogledov: 176; Prenosov: 69
.pdf Celotno besedilo (12,08 MB)
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Comprehensive permanent remote monitoring system of a multi-span highway bridge
Andrej Anžlin, Uroš Bohinc, Doron Hekič, Maja Kreslin, Jan Kalin, Aleš Žnidarič, 2021, objavljeni znanstveni prispevek na konferenci

Povzetek: As part of the reconstruction of a multi-span viaduct on a Slovenian highway, a permanent remote monitoring system with over 200 sensors was established. Several parameters are monitored on different parts of the viaduct by means of temperature sensors, accelerometers, strain gauges, long-gauge deformation and Fibre Bragg Grating (FBG) sensors. In this way strains, frequencies and temperatures on external prestressed beam cables, carbon fibre rebarsused for the flexural strengthening of a deck overhang, pier caps and prestressed beams are measured and stored into the on-site central data acquisition system. This paper presents architecture of the permanent bridge monitoring system and preliminary results of the measurements.
Ključne besede: permanent monitoring, structural health monitoring, bridge WIM, sensors, viaduct
Objavljeno v DiRROS: 22.01.2024; Ogledov: 163; Prenosov: 91
.pdf Celotno besedilo (9,29 MB)
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Extending BIM for air quality monitoring
Michael Nicolas Mrissa, Jan Vcelak, László Hajdu, Balázs Dávid, Miklós Ferenz Krész, Jakub Michal Sandak, Anna Malgorzata Sandak, Rok Kanduti, Monika Varkonji, Anja Jutraž, Katja Malovrh Rebec, 2020, objavljeni znanstveni prispevek na konferenci

Povzetek: As we spend more than 90% of our time inside buildings, indoor environmental quality is a major concern for healthy living. Recent studies show that almost 80% of people in European countries and the United States suffer from SBS (Sick Building Syndrome), which affects physical health, productivity and psychological well-being. In this context, environmental quality monitoring provides stakeholders with crucial information about indoor living conditions, thus facilitating building management along its lifecycle, from design, construction and commissioning to usage, maintenance and end-of-life. However, currently available modelling tools for building management remain limited to static models and lack integration capacities to efficiently exploit environmental quality monitoring data. In order to overcome these limitations, we designed and implemented a generic software architecture that relies on accessible Building Information Model (BIM) attributes to add a dynamic layer that integrates environmental quality data coming from deployed sensors. Merging sensor data with BIM allows creation of a digital twin for the monitored building where live information about environmental quality enables evaluation through numerical simulation. Our solution allows accessing and displaying live sensor data, thus providing advanced functionality to the end-user and other systems in the building. In order to preserve genericity and separation of concerns, our solution stores sensor data in a separate database available through an application programming interface (API), which decouples BIM models from sensor data. Our proof-of-concept experiments were conducted with a cultural heritage building located in Bled, Slovenia. We demonstrated that it is possible to display live information regarding environmental quality (temperature, relative humidity, CO2, particle matter, light) using Revit as an example, thus enabling end-users to follow the conditions of their living environment and take appropriate measures to improve its quality
Ključne besede: Building Information Model, internet of things, environmental quality monitoring, healthy living
Objavljeno v DiRROS: 19.01.2024; Ogledov: 128; Prenosov: 65
.pdf Celotno besedilo (18,89 MB)
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A sodium/potassium switch for G4-prone G/C-rich sequences
Yu Luo, Martina Lenarčič Živković, Jiawei Wang, Jan Ryneš, Silvie Foldynová-Trantírková, Lukáš Trantírek, Daniela Verga, Jean-Louis Mergny, 2024, izvirni znanstveni članek

Objavljeno v DiRROS: 16.01.2024; Ogledov: 152; Prenosov: 65
.pdf Celotno besedilo (2,17 MB)
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Tehnične smernice za ohranjanje in rabo genskih virov : lipe = Tilia spp.
Jan Svejgaard Jensen, 2013, strokovni članek

Ključne besede: genski viri, drevesne vrste, tehnične smernice, lipa, Tilia spp.
Objavljeno v DiRROS: 20.12.2023; Ogledov: 242; Prenosov: 43
.pdf Celotno besedilo (827,29 KB)

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