Browsing by Subject "precision"

Now showing 1 - 4 of 4

Access status: Open Access ,
Comparative analysis of different trust metrics of user-user trust-based recommendation system
(Wydawnictwa AGH, 2022) Roy, Falguni; Hasan, Mahamudul
Information overload is the biggest challenge nowadays for any website – especially e-commerce websites. However, this challenge has arisen due to the fast growth of information on the web (WWW) along with easier access to the internet. A collaborative filtering-based recommender system is the most useful application for solving the information overload problem by filtering relevant information for users according to their interests. However, the current system faces some significant limitations such as data sparsity, low accuracy, cold-start, and malicious attacks. To alleviate the above-mentioned issues, the relationship of trust incorporates in the system where it can be among users or items, such a system is known as a trust-based recommender system (TBRS). From the user perspective, the motive of a TBRS is to utilize the reliability among users to generate more-accurate and trusted recommendations. However, the study aims to present a comparative analysis of different trust metrics in the context of the type of trust definition of TBRS. Also, the study accomplishes 24 trust metrics in terms of the methodology, trust properties & measurements, validation approaches, and the experimented data set.
Access status: Open Access ,
Evaluation of Post-Processing Kinematic (PPK) Accuracy in Urban Area in Turgutlu, Manisa, Türkiye
(Wydawnictwa AGH, 2025) Pırtı, Atınç; Yücel, Mehmet Ali
In recent years, global navigation satellite systems (GNSSs) have emerged as a prominent technology for geolocation applications and services in urban settings. Urban environments should also be classified under difficult situations. Densely populated metropolitan areas such as urban centers obstruct the receipt of GNSS signals; these obstacles often result in the congestion of line-of-sight (LOS) signals and give rise to the receipt of diffracted or reflected echoes (often known as the multipath phenomenon). PPK (post-processing kinematic) is a GNSS data-processing method that achieves high-accuracy positioning by correcting errors in raw positioning data. Post-processing is widely used in applications that require precise geospatial information, such as surveying, mapping, and UAV operations. This research aims to evaluate the accuracy of the PPK application method in urban areas. For this aim, surveys were carried out in Turgutlu’s province of Manisa on July 15, 2020, in Türkiye. The analysis compared the PPK surveys’ results with those that were obtained from static surveys. PPK is very effective in difficult situations, but we were likely to encounter certain accuracy problems. Nevertheless, it is worth noting that achieving urban surveys with an accuracy from ±1 cm to ±2 cm may not always be feasible due to the challenging circumstances that might result in more-significant inaccuracies from ±10 cm to ±100 cm for both the horizontal and vertical components.
Access status: Restricted ,
Experimental evaluation of the precision of mobile terminal location techniques in contemporary wireless local area networks
(Data obrony: 2021-03-25) Dybowicz, Michał
Wydział Informatyki, Elektroniki i Telekomunikacji
Access status: Restricted ,
Ocena przydatności metod ICP- MS ICP- OES do oznaczenia ołowiu w wodzie przeznaczonej do spożycia przez ludzi
(Data obrony: 2014-04-25) Murzyn, Weronika
Wydział Geologii, Geofizyki i Ochrony Środowiska
The aim of the study is validation of methods ICP-MS and ICP-OES for their use for the determination of lead in water intended for human consumption. For this purpose an assessment parameters that are unique to the above-mentioned methods: accuracy, limit of detection, limit of quantification, accuracy, uncertainty and the range of methods. We analyzed the results of lead in laboratory control samples - blind, blind field duplicate, and collected and analyzed in an accredited hydrogeology laboratory of cathedral Hydrogeology and engineering Geology AGH. With regard to precision parameters, validation methods and scope (for ICP-OES), these parameters are not compatible conditions acceptance of Polish standards and regulations. While the uncertainty and limit of detection are in accordance with the guidelines (are < 10% of the value of parameter). The analyzes carried out it was found the usefulness of ICP-MS in determining lead in potable waters.