1,721,000 research outputs found
Metodologie ICT per lo studio e la fruizione di siti archeologici nel Mediterraneo
No full textNel presente contributo si intende fornire una panoramica su come sono state ideate e realizzate le due guide mobili per i siti archeologici di Arslatepe e Elaiussa Sebaste in Turchia. I prototipi sono stati prodotti attraverso la combinazione tra strumenti ICT e il sistema GPS in modo da cercare di fornire una risposta ai due quesiti seguenti:
1. come valorizzare il patrimonio archeologico del Mediterraneo?
2. è possibile trovare nuovi metodi per soddisfare la necessità del turista culturalmente preparato di aumentare la conoscenza in campo archeologico
Kinematic DGNSS Feasibility and Applications
No full textREPORTS ON GEODESY, POLITECHNIKA WARSZAWSKA,WARSHA
EGNOS ESTB field tests in static and kinematic modes
No full textEGNOS (European Geostationary Navigation Overlay System) ESTB (EGNOS System Test Bed) static and kinematic tests were performed in order to analyse the signal transmission capabilities coming from the lnmarsat Geostationary Satellite PRN120.
The data were stored in the Stand-alone mode and compared with the a priori known co-ordinates of the control point used for the experiment, or with the post-processed phase data relative to the same point.
The results demonstrate that EGNOS, even though enhancing the accuracies with respect to the Standalone positioning, cannot completely meet the required standards yet
EXTRACTION OF ROAD GEOMETRIC PARAMETERS FROM HIGH RESOLUTION IMAGES VALIDATED BY GEODETIC TECHNIQUES
No full textAssessment of Design Consistency for Two-Lane Rural Highways with Low Tortuosity Alignment
Full text linkOne technique employed to enhance road safety involves assessing the alignment’s consistency. A prevalent measure of consistency is evaluating speed variations along the alignment. A key consideration in this assessment is determining the speed upon which the road alignment should be based. This research reveals that on two-lane rural highways with low tortuosity alignments, operating speeds on horizontal curves and tangents consistently exceeded not only the design speeds but also the maximum permissible design speed for the road category. Consequently, using the design speed to assess consistency on these roads is deemed impractical, and utilizing operating speed poses challenges due to speeds exceeding the maximum permissible limit. The objectives of this paper are twofold: to explore the relationship between design consistency and safety levels on two-lane rural highways with low tortuosity alignments (which have been insufficiently covered in research) and to propose speed-control measures to limit the maximum operating speed to the maximum permissible speed. The study findings suggest that on roads with a low tortuosity alignment, operating speeds depend much more on the general characteristics of the alignment (evaluated in the operating speed models through the desired speed). Further, assessing speed consistency is feasible only with a rigorous control of the maximum operating speed (desired speed). Additionally, a specific type of speed control is recommended, achieved by limiting the curvature change rate (CCR) of the road section based on the desired speed (environmental speed), whose evaluation becomes a crucial factor
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