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Iskalni niz: "avtor" (Norbert Kr%C3%BCger) .

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1.
Underwater measurements with UX robots; a new and available tool developed by UNEXUP
Norbert Zajzon, Boglárka Anna Topa, Richárd Zoltán Papp, Jussi Aaltonen, José Miguel Almeida, Carlos Almeida, Alfredo Martins, Balázs Bodó, Stephen Henley, Márcio Tameirão Pinto, Gorazd Žibret, 2023, izvirni znanstveni članek

Povzetek: The UNEXMIN (Horizon 2020) and UNEXUP (EIT RawMaterials) projects developed a novel technology to send robots and even autonomously deliver optical images, 3D maps and other georeferenced scientific data from flooded underground environments, like abandoned mines, caves or wells. The concept turned into a market ready solution in seven years, where the last few years of field trials of the development beautifully demonstrating the technology's premier capabilities. Here in this paper, we focus on the wide variety of environments, circumstances and measurements where the UNEXMIN technology can be the best solution or the only solution to deliver certain research or engineering data. These are obtained from both simple and complex environments like different mines and caves, small and large cavities, long and tight tunnels and shafts, different visibility conditions, even different densities of the liquid medium where UX robots operated.
Ključne besede: autonomous robot, underwater measurements, UNEXUP project
Objavljeno v DiRROS: 07.09.2023; Ogledov: 286; Prenosov: 102
.pdf Celotno besedilo (8,86 MB)

2.
Quality-assurance of heat-flow data: the new structure and evaluation scheme of the IHFC Global Heat Flow Database
Sven Fuchs, Ben Norden, Florian Neumann, Norbert Kaul, Akiko Tanaka, Ilmo T. Kukkonen, Christophe Pascal, Rodolfo Christiansen, Gianluca Gola, Dušan Rajver, 2023, izvirni znanstveni članek

Povzetek: Since 1963, the International Heat Flow Commission has been fostering the compilation of the Global Heat Flow Database to provide reliable heat-flow data. Over time, techniques and methodologies evolved, calling for a reorganization of the database structure and for a reassessment of stored heat-flow data. Here, we provide the results of a collaborative, community-driven approach to set-up a new, quality-approved global heat-flow database. We present background information on how heat-flow is determined and how this important thermal parameter could be systematically evaluated. The latter requires appropriate documentation of metadata to allow the application of a consistent evaluation scheme. The knowledge of basic data (name and coordinates of the site, depth range of temperature measurements, etc.), details on temperature and thermal-conductivity data and possible perturbing effects need to be given. The proposed heat-flow quality evaluation scheme can discriminate between different quality aspects affecting heat flow: numerical uncertainties, methodological uncertainties, and environmental effects. The resulting quality codes allow the evaluation of every stored heat-flow data entry. If mandatory basic data are missing, the entry is marked accordingly. In cases where more than one heat-flow determination is presented for one specific site, and all of them are considered for the site, the poorest evaluation score is inherited to the site level. The required data and the proposed scheme are presented in this paper. Due to the requirements of the newly developed evaluation scheme, the database structure as presented in 2021 has been updated and is available in the appendix of this paper. The new quality scheme will allow a comprehensible evaluation of the stored heat-flow data for the first time.
Ključne besede: heat-flow density, quality scheme, thermal geophysics, global heat flow database (GHFD), thermal parameter, data information system, International Heat Flow Commission (IHFC)
Objavljeno v DiRROS: 09.08.2023; Ogledov: 305; Prenosov: 114
.pdf Celotno besedilo (4,78 MB)

3.
UNEXUP: robot-based exploration technology for underground flooded mines
Márcio Tameirão Pinto, Gorazd Žibret, Luís Lopes, Balázs Bodó, Norbert Zajzon, 2020, izvirni znanstveni članek

Povzetek: UNEXUP is a direct continuation of the UNEXMIN project. In UNEXMIN efforts were made towards the design, development and testing of a robotic exploration technology for underground flooded mines, with navigational and geoscientific instruments. In UNEXUP the main goal is to raise commercial interest and improve the system's hardware, software and capabilities. The UX-1 NEO, to be developed and tested in 2020, will address the limitations detected during UNEXMIN field missions, and will meet the needs and requirements from mining companies, geological surveys and other potential customers. In addition, a new robot will be built and added to the system, to be ready in 2021, which will open further mineral exploration possibilities.
Objavljeno v DiRROS: 07.01.2021; Ogledov: 1422; Prenosov: 694
.pdf Celotno besedilo (1,68 MB)

4.
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