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Ključne besede: Picea abies, spruce needles, extracellular particles, extracellular vesicles, small cellular particles, interferometric light microscopy, exosomes, cell-to-cell communication, drug delivery
Objavljeno v DiRROS: 07.02.2024; Ogledov: 158; Prenosov: 106
Celotno besedilo (2,49 MB)
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Objavljeno v DiRROS: 02.02.2024; Ogledov: 156; Prenosov: 68
Celotno besedilo (9,44 MB)
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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: 235; Prenosov: 97
Celotno besedilo (12,08 MB)
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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: 251; Prenosov: 116
Celotno besedilo (9,29 MB)
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Povzetek: Background. A computer system HIPSTRESS is described. The system can be used for the determination of the contact stress distribution in the hip joint for a known body weight and some characteristic pelvic and hip geometrical parameters which can be determined directly from the standard antero-posteriorradiograph. Conclusions. The system can be applied in clinicalpractice to predict an optimal stress distribution in different operative interventions in the hip.
Objavljeno v DiRROS: 22.01.2024; Ogledov: 150; Prenosov: 42
Celotno besedilo (349,89 KB)