Search results for "2R"
showing 3 items of 93 documents
Vizuālu semantisku vaicājumu izpilde pār relāciju datubāzēm
2021
Maģistra darba mērķis ir padziļināti izpētīt esošās metodes, rīkus un optimizācijas semantisko vaicājumu tulkošanai uz SQL un izpildei pār relāciju datubāzēm, un, veicot praktiskus eksperimentus, atrast galvenos cēloņus tam, kāpēc rīku ģenerētie vaicājumi nav optimāli. Vizuālu semantiska līmeņa (ontoloģijas izmantojošu) vaicājumu pār datiem veidošana var ļaut gala lietotājam tieši piekļūt ontoloģiju formā organizētiem datiem. Uz ontoloģijām balstīta piekļuve datiem piedāvā iespējas pārveidot semantiskus SPARQL vaicājumus par SQL vaicājumiem, kas var tikt izpildīti pār relāciju datubāzēm. Tomēr pieejamās tehnoloģijas, piemēram, rīks Ontop, atbalsta tikai ierobežotu vaicājumu klašu translācij…
Assessment of Sentinel-2-MSI Atmospheric Correction Processors and In Situ Spectrometry Waters Quality Algorithms
2022
The validation of algorithms developed from in situ reflectance to estimate water quality variables has the challenge of atmospheric correction (AC) when applied to satellite images. Estimating water quality variables from satellite images requires an accurate estimation of remote sensing reflectances (Rrs) which vary according to the AC applied. Validation processes for both Rrs and water quality algorithms were carried out, relating the in situ Rrs (convoluted to Sentinel-2-MSI spectral response function) with the satellite Rrs coming from different ACs (C2RCC, C2X, C2XC, and Polymer), and also relating the in situ water quality variable data with estimated water quality variable values, …
Psychometric Properties of the Scoliosis Research Society Questionnaire (Version 22r) Domains Among Adults With Spinal Deformity : A Rasch Measuremen…
2022
Objective: Adults with degenerative spinal deformity (ASD) have lower health-related quality of life (HRQL) compared to the general population. Applying Rasch Measurement Theory (RMT), this study tested the revised Scoliosis Research Society-22 (SRS-22r) HRQL instrument among symptomatic adult patients with degenerative spinal disorders and varying degrees of ASD. Methods: SRS-22r data from 637 outpatient spine clinic patients with degenerative spine conditions were investigated for unidimensionality, item/scale fit, differential item functioning (DIF), scale coverage/targeting, and person separation index (PSI) using RMT. Results: Unidimensionality of the SRS-22r was not supported for eith…