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1461 - 1470 / 2000
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1461.
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1464.
Indoor navigation with a Smartphone
Drago Torkar, 2024, independent scientific component part or a chapter in a monograph

Abstract: This chapter presents a cost-effective system for indoor localization and navigation that does not require the use of satellite positioning or data communication networks. The system, implemented as a smartphone app, relies on QR codes that are pre-generated and attached to the walls inside the building. By utilizing the information from these codes and the smartphone’s inertial motion unit (IMU) sensors processed by the Pedestrian Dead-Reckoning (PDR) algorithm, the user’s current position can be determined. The Dijkstra navigation algorithm is then used to guide the user to the desired destination. The smartphone app can also be used as a healthcare logistics service in mass-casualty incidents for collecting and reporting georeferenced triage decisions to the cloud.
Keywords: internet thinks, indoor navigation, systems, QR codes
Published in DiRROS: 02.07.2024; Views: 275; Downloads: 142
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1465.
Explainable anomaly detection of 12-Lead ECG signals using denoising autoencoder
Rok Hribar, Drago Torkar, 2024, independent scientific component part or a chapter in a monograph

Abstract: The basic idea was to create a proof of concept demonstrating that the indoor navigation and localisation is possible using only passive tags. For this purpose, a smartphone navigation app was developed to be used in inner parts of the buildings and which can operate with no satellite positioning service available and no communication network present. The satellite navigation systems (GPS, GLONASS, Galileo, BeiDou, QZSS, IRNSS) inside buildings, at least on lower floors and cellars, in central parts, and away from windows, usually do not work, or their accuracy is very reduced due to a small number of visible satellites. The communication networks (WiFi, LTE, 5G…) might not be available in some circumstances such as catastrophic incidents, power reductions, or similar, which disables the localisation systems based on them. The purpose of the smartphone app was twofold. First, to develop a reliable, simple-to-use, and cheap indoor navigation system that could be used in large buildings like hospitals, shopping malls, trade centres, fairs, etc. where no other positioning service is available. Second, to develop an indoor position reporting system that can be used in accidents and mass-casualty incidents for reporting triage decisions to the server. Both functionalities are based on the QR codes [1] holding all the information needed.
Keywords: internet thinks, indoor navigation, systems, QR codes
Published in DiRROS: 02.07.2024; Views: 284; Downloads: 179
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1466.
The powerful class of groups
Primož Moravec, 2024, original scientific article

Abstract: Pro-$p$ groups of finite powerful class are studied. We prove that these are $p$-adic analytic, and further describe their structure when their powerful class is small. It is also shown that there are only finitely many finite $p$-groups of fixed coclass and powerful class.
Keywords: finite p-groups, powerful class, pro-p groups
Published in DiRROS: 02.07.2024; Views: 256; Downloads: 132
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1468.
Depolimerizacija PET-a z aminolizo : diplomsko delo
Nika Bizilj, 2023, undergraduate thesis

Keywords: aminoliza, depolimerizacija, PET, amini, karakterizacija, tereftalamidi, diplomsko delo
Published in DiRROS: 01.07.2024; Views: 291; Downloads: 183
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1469.
Optimization of starch–tannin adhesives for solid wood gluing
Annalisa Magnabosco, Illya Kulyk, Maurizio Avancini, Primož Šket, Jonas Eckardt, Emanuele Cesprini, Francesco Marinello, Gianluca Tondi, 2024, original scientific article

Published in DiRROS: 01.07.2024; Views: 295; Downloads: 214
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1470.
Influence of 0.25% indium addition to ▫$Ni/CeO_2$▫ catalysts for dry reforming of methane
Anita Horváth, Andrea Beck, Miklós Németh, Györgyi Sáfrán, Matevž Roškarič, Gregor Žerjav, Albin Pintar, 2024, original scientific article

Published in DiRROS: 01.07.2024; Views: 334; Downloads: 198
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