Search results for "Sensitivity"

showing 10 items of 3059 documents

Dataset relative to article "Sensitivity and specificity of a commercial ELISA test for anti-MAG antibodies in patients with neuropathy"

2021

This record contains data related to article “Sensitivity and specificity of a commercial ELISA test for anti-MAG antibodies in patients with neuropathy". Abstract For the diagnosis of anti-MAG polyneuropathy the commercial ELISA manufacturer currently recommends a cut-off of 1000 Bühlmann Titer Units (BTU). We analyzed sera from 80 anti-MAG neuropathy patients and 383 controls (with other neuropathies or healthy controls) to assess the ELISA sensitivity and specificity at different thresholds. A better combination of sensitivity/specificity was found at a threshold >1500 BTU than at >1000 BTU. The best value of specificity was obtained at threshold >7000 BTU. There…

chronic inflammatory demyelinating polyradiculoneuropathySensitivitynervous systemAnti-MAG polyneuropathyELISASpecificity.
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Upper limits on the isotropic gravitational-wave background from Advanced LIGO and Advanced Virgo's third observing run

2021

We report results of a search for an isotropic gravitational-wave background (GWB) using data from Advanced LIGO's and Advanced Virgo's third observing run (O3) combined with upper limits from the earlier O1 and O2 runs. Unlike in previous observing runs in the advanced detector era, we include Virgo in the search for the GWB. The results are consistent with uncorrelated noise, and therefore we place upper limits on the strength of the GWB. We find that the dimensionless energy density $\Omega_{\rm GW}\leq 5.8\times 10^{-9}$ at the 95% credible level for a flat (frequency-independent) GWB, using a prior which is uniform in the log of the strength of the GWB, with 99% of the sensitivity comi…

coalescencePhysics and Astronomy (miscellaneous)gravitation: modelAstronomypopulationAstrophysicspower spectrum01 natural sciencesGeneral Relativity and Quantum CosmologyPhysics Particles & FieldsGravitational wave backgroundbackground: magneticenergy: densitycorrelation functionLIGOQCPOPULATIONQBPhysicsSettore FIS/01education.field_of_studySpectral indexPhysicsstar-formation ratestatistical analysis: BayesianIsotropicSTAR-FORMATION RATE; BLACK-HOLE; MASS; COALESCENCE; POPULATION; EVOLUTION; RADIATION; PROSPECTSCOALESCENCEPhysical Sciences[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]LIGO; Virgo; isotropic gravitational-wave backgroundIsotropic gravitational wave backgrounds with LIGO and VirgoAstrophysics - Cosmology and Nongalactic Astrophysicsgravitational radiation: polarizationdata analysis methodCosmology and Nongalactic Astrophysics (astro-ph.CO)black-holePopulationFOS: Physical sciencesGravitational Waves LIGO Virgo Stochastic Background IsotropicGeneral Relativity and Quantum Cosmology (gr-qc)Astronomy & AstrophysicsMASSSTAR-FORMATION RATEBinary black holebinary: coalescence0103 physical sciencesevolutionddc:530SDG 7 - Affordable and Clean Energy2ND010306 general physicseducationGravitational Waves/dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energyScience & Technology010308 nuclear & particles physicsGravitational waveVirgogravitational radiation: backgroundSpectral densityprospectsbinary: compactnoise: magneticLIGOEVOLUTIONisotropic gravitational-wave backgroundBlack holeradiationdetector: sensitivityPROSPECTSVIRGOpolarization: scalarblack hole: binaryGravitation Cosmology AstrophysicsBLACK-HOLEpolarization: vectorRADIATIONmassStochastic BackgroundDewey Decimal Classification::500 | Naturwissenschaften::530 | Physik[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
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Inducing Cold-Sensitivity in the Frigophilic Fly Drosophila montana by RNAi

2016

The work was supported by CNPq (Fellowship to FMV) and a NERC Studentship to DJP. Cold acclimation is a critical physiological adaptation for coping with seasonal cold. By increasing their cold tolerance individuals can remain active for longer at the onset of winter and can recover more quickly from a cold shock. In insects, despite many physiological studies, little is known about the genetic basis of cold acclimation. Recently, transcriptomic analyses in Drosophila virilis and D.montana revealed candidate genes for cold acclimation by identifying genes upregulated during exposure to cold. Here, we test the role of myo-inositol-1-phosphate synthase (Inos), in cold tolerance in D. montana …

cold-sensitivityQH301 Biologycold acclimationselviytyminenlcsh:Rfungilcsh:MedicineQH426 Geneticscold toleranceseasonal coldThermal adaptationQH301RNAitalvihyönteisetlcsh:Qlcsh:ScienceDrosophiliaQH426
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Differences in Chromatic Sensitivity Estimated Using Static and Dynamic Colour Stimuli

2017

Abstract The current study reports on a novel computerised colour vision test employing static and dynamic stimuli. The aim of the study was to assess if static and dynamic stimuli result in comparable chromatic discrimination thresholds when participant’s age is taken into account. Participants (n = 20) were 21 to 77 years old, had normal colour vision and no history of any eye disease. They all participated in two sessions estimating chromatic sensitivity with static and dynamic stimuli, respectively, with six directions in colour space varying either along the red-green (RG) or yellow- blue (YB) directions. We found no significant differences in chromatic thresholds along a tritan axis o…

computerised colour vision testMultidisciplinaryGeneral interestScienceQstatic and dynamic stimuliChromatic scaleSensitivity (control systems)Biological systempsyhophysicsMathematicsProceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.
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Presbiopijas korekcija ar multifokālajām intraokulārajām lēcām

2017

Bakalaura darbs ir uzrakstīts angļu valodā uz 47 lapaspusēm. Tas satur 3 zīmējumus, 20 tabulas, 39 literatūras avotus un pielikumu. Darba mērķis ir salīdzināt divu jaunu intraokulāro lēcu (difraktīvā trifokālā lēca un paplašināta fokusa dziļuma multifokālā lēca) efektivitāti presbiopija korekcijā pēc kataraktas operācijas. Pētījumi tika veikti 3 mēnešu periodā pēc kataraktas operācijas, kad tika novērtēta redzes kvalitāte, mērot redzes asumu un kontrasta redzi fotopiskos gaismas un mezopiskos krēslas apstākļos. Abi introokulāro lēcu veidi nodrošināja lielisku redzes asumu visos skata attālumos un pilnu neatkarību no brillēm. Taču kontrasta jūtība un redzes asums mezopiskos krēslas apstākļos…

contrast sensitivityIOLspresbyopiacataract surgeryOptometrijaphotopic and mesopic visual acuity
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Visual Acuity and Contrast Sensitivity Depending from Keratoconus Apex Position

2017

Abstract Various studies have demonstrated that patients with keratoconus have significant loss of contrast sensitivity while its value varies in different studies. None of these studies has analysed reduced contrast sensitivity depending on the position of apex of corneal conus. Visual acuity and contrast sensitivity were evaluated for patients with keratoconus using the FrACT software. Contrast sensitivity was assessed at the following frequencies: 1, 3, 5, 7, 9, 11, 13, and 15 cycles per degree (cpd). Twenty-four eyes with keratoconus were analysed. Contrast sensitivity was significantly lower for patients with the apex at the centre compared with apex on the periphery both with (p = 0.0…

contrast sensitivityKeratoconusmedicine.medical_specialtyMultidisciplinaryVisual acuitygenetic structuresGeneral interestbusiness.industrykeratoconusSciencemedia_common.quotation_subjectQapex on the peripherymedicine.diseaseeye diseasesApex (geometry)apex at the centreOpticsOphthalmologymedicineContrast (vision)medicine.symptombusinessSensitivity (electronics)media_commonProceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.
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Pelēki tonētu lēcu ietekme uz redzes funkcijām

2017

Darbs ir uzrakstīts andļu valodā uz 27 lapaspusēm, tajā ir 12 attēli, 2 tabulas un 36 litteratūras avoti. Darba mērķis bija novērtēt, kā samazināta apgaismojuma apstākļi ietekmē redzes funkcijas gados jaunākiem un vecākiem dalībniekiem. Gados jauniem (21 – 35 gadi) un vecākiem (60 – 75 gadi) dalībniekiem tika mērīts augsta un zema kontrasta redzes asums. Mērījumi tika veikti ar un bez pelēki tonētām lēcām, kuru gaismas caurlaidība bija 50 %. Rezultāti parādīja, ka lielāks redzes asuma samazinājums, samazinoties optotipu kontrastam, bija novērojams gados vecākiem dalībniekiem. Skatoties caur tonētajām lēcām, standarta kontrasta redzes asums vairāk samazinājās gados vecākiem nekā jaunākiem da…

contrast sensitivityVisual acuitycolored filteragingOptometrija
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Acs optiskās kvalitātes ietekme uz kontrastjutību un redzes asumu

2017

Darbs ir uzrakstīts angļu valodā uz 50 lapaspusēm, satur 37 figūras, 1 tabula un 41 literatūras avotus. Pētījuma mērķis bija novērtēt redzes kvalitāti dalībniekiem ar dažādām izmaiņām acs optiskajās vidēs. Augsta kontrasta redzes asums, mezopiskais redzes asums un kontrastjutība ir labi parametri acs optiskās kvalitātes novērtēšanai. Mezopiskais redzes asums ir ar augstu jutību, lai atklātu dalībniekus ar nelielas pakāpes apduļķojumiem acs optiskajās vidēs (agrīna katarakta). Kontrastjutības tests ir jutīgs uz izmaiņām acs optiskajās vidēs dalībniekiem ar ortokeratoloģijas lēcām. Augsta kontrasta redzes asums ir pietiekami jutīgs uz cita veida izmaiņām acs struktūrās

contrast sensitivitydisability glarevisual acuityhigher order aberrationsOptometrijamesopic visual acuity
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Entrenamiento perceptual, test de caras sonrientes

2016

Este software es una programa de entrenamiento perceptual con estímulos acromáticos de contraste variable, sobre ruído aleatorio sintonizado a una banda de frecuencia. La aplicación ha sido desarrollada dentro en el marco de un estudio sobre la ambliopía, realizado por la profesora Rosa Hernández, y está todavía en proceso de evaluación. This is perceptual training software using achromatic stimuli with variable contrast and random noise tuned to a particular frequency bandwith. This app has been developed in the context of a study of amblyopia, carried out by professor Rosa Hernández, and is still under testing.

contrast sensitivityperceptual trainingamblyopiaUNESCO::FÍSICA::Óptica ::Optometría
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Redzes funkciju izvērtējums pacientiem agrīnā presbiopijas vecumā ar vienas dienas multifokālajām kontaktlēcām

2017

Bakalaura darbs uzrakstīts uz 27 lapaspusēm, satur 18 zīmējumus, 1 tabulu un 20 literatūras avotus. Darba mērķis ir novērtēt redzes asumu un kontrasta jūtību fotopiskos un mezopiskos apstākļos pacientiem, koriģētiem ar brillēm un vienas dienas multifokālajām kontaktlēcām. Mūsu pētījumi parādīja, ka fotopiskos apstākļos pacientiem pēc korekcijas ar multifokālajām kontaktlēcām redzes asums vidēji samazinājās par 0,02 logMAR vienībām. Mezopiskos krēslas apstākļos pacientiem koriģētiem ar multifokālajām kontaktlēcām redzes asuma samazinājums vidēji bija 0.05 logMAR vienības. Atšķirības redzes asumā ir statistiski nozīmīgas. Kontrasta jūtības vidējie lielumi pēc kontaktlēcu uzlikšanas vidēji sam…

contrast sensitivityphotopic conditionpresbyopia correctionmesopic conditionOptometrijamultifocal contact lenses
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