Search results for "Quality assessment"
showing 10 items of 63 documents
Image Quality Assessment by saliency maps
2012
Image Quality Assessment (IQA) is an interesting challenge for image processing applications. The goal of IQA is to replace human judgement of perceived image quality with a machine evaluation. A large number of methods have been proposed to evaluate the quality of an image which may be corrupted by noise, distorted during acquisition, transmission, compression, etc. Many methods, in some cases, do not agree with human judgment because they are not correlated with human visual perception. In the last years the most modern IQA models and metrics considered visual saliency as a fundamental issue. The aim of visual saliency is to produce a saliency map that replicates the human visual system (…
Visual quality with corneo-scleral contact lenses after intracorneal ring segment (ICRS) implantation for keratoconus management
2019
Purpose: To evaluate the visual quality results when fitting a corneo-scleral contact lens (CScL) after intracorneal ring segment (ICRS) implantation for keratoconus management. Methods: Twenty-seven eyes of 27 patients with keratoconus underwent ICRS implantation and had CScL fitted as their visual quality was unsatisfactory with their spectacles or contact lenses. Patients received a complete eye examination, refraction and visual acuity assessment, anterior eye biomicroscopy, ocular fundus examination, corneal topographic analysis, endothelial-cell count, and visual quality assessment using contrast sensitivity and aberrometry tests. A diagnostic trial set was used in the fitting process…
Evaluation and Quality Assurance in Finnish and Italian Universities in the Bologna Process
2008
Abstract The purpose of the study is to describe the evaluation and quality assurance practices employed in the basic units of Finnish and Italian universities and analyse the impact of the Bologna process on quality assessment. The data consist of interviews (n=30) conducted in Finland and Italy. The results suggest that: (1) evaluation and quality assurance were primarily seen in connection with the educational provision of the university; (2) although the respondents were familiar with evaluation, they were unsure about the procedures and effects of quality assurance in their unit; and (3) despite the harmonising aim of the Bologna process, evaluation, and quality assurance appeared to m…
Validación y verificación analítica de los métodos microbiológicos
2015
Clinical microbiologists should ensure, to the maximum level allowed by the scientific and technical development, the reliability of the results. This implies that, in addition to meeting the technical criteria to ensure their validity, they must be performed with a number of conditions that allows comparable results to be obtained, regardless of the laboratory that performs the test. In this sense, the use of recognized and accepted reference methodsis the most effective tool for these guarantees. The activities related to verification and validation of analytical methods has become very important, as there is continuous development, as well as updating techniques and increasingly complex …
Quality assessment of protein NMR structures.
2013
Biomolecular NMR structures are now routinely used in biology, chemistry, and bioinformatics. Methods and metrics for assessing the accuracy and precision of protein NMR structures are beginning to be standardized across the biological NMR community. These include both knowledge-based assessment metrics, parameterized from the database of protein structures, and model versus data assessment metrics. On line servers are available that provide comprehensive protein structure quality assessment reports, and efforts are in progress by the world-wide Protein Data Bank (wwPDB) to develop a biomolecular NMR structure quality assessment pipeline as part of the structure deposition process. These qu…
Wykorzystanie ram jakości M.J. Epplera do ewaluacji jakości informacji serwisów internetowych PWSZ
2019
The article presents the evaluation of information quality on the websites of the State Higher Vocational Schools (PWSZ) in Poland. The information quality framework proposed by M.J. Eppler was adopted as a diagnostic tool to identify gaps in information quality. The assessment was conducted from the user's perspective. Firstly, the ranking of the PWSZ sites in Poland was created. Secondly, the criteria for the quality of information in the website infrastructure were analysed. The conclusions result in a statement that most websites demonstrate a low level of information quality. The scope of synthetic measures ranges from 60.0% to 90.8% which indicates a wide variation in the information …
The use of two-diode substitute model in predicting the efficiency of PV conversion in low solar conditions
2017
The article presents theoretical foundations of a two-diode equivalent model of a photovoltaic cell/module (PV), together with calculation procedures. A physical interpretation of individual components of an equivalent model was presented. Its practical application in predicting efficiency of operation of various PV cells and modules in low insulation conditions was demonstrated. The obtained predictions were verified with the actual results of their operation in open space (outdoor). The practical suitability of the “model” in early detection of ageing phenomena, such as, for example, absorber degradation taking place in PV modules, was demonstrated. The article was prepared on the basis o…
Application of the reduced I-V Blaesser’s characteristics in predicting PV modules and cells conversion efficiency in medium and high insolation cond…
2017
The article presents theoretical foundations of application of the reduced I-V Blaesser’s characteristics in predicting a photovoltaic cell/module (PV) efficiency, together with calculation procedures. A detailed analysis of the error of this transformation method of characteristics was carried out. Its practical application in predicting efficiency of operation of various PV cells and modules in medium and high insulation conditions was demonstrated. The practical suitability of the presented method in early detection of ageing phenomena, such as, for example, absorber degradation taking place in PV modules, was demonstrated. The article was prepared on the basis of the results of testing …
Sea Water Quality Assessment Based on Tidal Condition in Sawaibu Bay Manokwari
2018
Pasar Sanggeng yang terletak di pesisir Teluk Doreri Kota Manokwari, menjadi salah satu pusat perdagangan yang melayani kebutuhan masyarakat. Secara umum dagangan di Pasar Sanggeng terdiri dari kebutuhan rumah tangga, jual beli sayur dan tempat penjualan ikan. Pasar tersebut merupakan jantung kota yang setiap hari dipenuhi masyarakat untuk berbelanja. Akibat adanya aktivitas yang tinggi tersebut menyebabkan pembungan sampah-sampah organik tidak terawasi atau terkontrol dengan baik. Sampah- sampah tersebut seperti sisa-sisa makanan, sayuran, buah-buahan dan sisa-sisa buangan ikan mentah dari tempat penjualan ikan. Kondisi ini berlangsung secara terus menerus setiap hari sehingga dapat menyeb…
Protein Biomarkers of Bovine Defective Meats at a Glance: Gel-Free Hybrid Quadrupole-Orbitrap Analysis for Rapid Screening
2021
An understanding of biological mechanisms that could be involved in the stress response of animal cattle prior to slaughter is critical to create effective strategies aiming at the production of high-quality meat. The sarcoplasmic proteome of directly extracted samples from normal and high ultimate pH (pHu) meat groups was studied through a straightforward gel-free strategy supported by liquid chromatography hybrid quadrupole-Orbitrap high-resolution mass spectrometry (LC-HRMS) analysis. A stepped proteomic pipeline combining rapid biomarker hunting supported by qualitative protein Mascot scores followed by targeted label-free peptide quantification revealed 26 descriptors that characterize…