Search results for "Eye"
showing 10 items of 2511 documents
Deducing self-interaction in eye movement data using sequential spatial point processes
2016
Eye movement data are outputs of an analyser tracking the gaze when a person is inspecting a scene. These kind of data are of increasing importance in scientific research as well as in applications, e.g. in marketing and man-machine interface planning. Thus the new areas of application call for advanced analysis tools. Our research objective is to suggest statistical modelling of eye movement sequences using sequential spatial point processes, which decomposes the variation in data into structural components having interpretation. We consider three elements of an eye movement sequence: heterogeneity of the target space, contextuality between subsequent movements, and time-dependent behaviou…
<title>Assessment of ocular stereovision prevalence and eye dominance stability</title>
2005
The paper reports on the development of the equipment for studies of the eye dominance and ocular stereoprevalence by using black-and-white and color stereostimuli. The stereostimuli are separated either by color-filter goggles or phase separating liquid-crystal-shutter goggles. The stability of the stereoprevalence is studied by artificial step-by-step deterioration of the retinal image quality, particularly in the dominant eye. The stimuli are blurred using spatial Gaussian filtering. The polymer-dispersed-liquid-crystal cell placed in front of the dominant eye induces a controllable light scattering. The stimuli-blurring and light-scattering methods exhibit different influence on the eye…
Zemes un vides zinātnes (Latvijas Universitātes Raksti; 783. sēj.)
2012
Šis LU Rakstu speciālais sējums satur rakstus, kas balstās uz dažiem 8. Baltijas stratigrāfijas konferences sniegtiem ziņojumiem un aptver galvenokārt paleontoloģijas un stratigrāfijas tēmas, kā arī lietišķās ģeoloģijas aspektus. Daži no ziņojumiem jau ir publicēti vai tuvākā nākotnē tiks iespiesti arī citos zinātniskos žurnālos. The current special volume of the Acta Universitatis Latviensis comprises the papers submitted by participants of the Eighth Baltic Stratigraphical Conference (8 th BSC) held in Riga, Latvia, on 28 August – 2 September 2011.
Safety of sublingual immunotherapy started during the pollen season
2009
Sublingual immunotherapy (SLIT) is safer than subcutaneous immunotherapy (SCIT) and this has lead to the reconsideration of the use of ultra-rush schedules for SLIT. The aim of this study was to assess the safety of ultra-rush SLIT in pollen-allergic children according to different timing of administration in relation to the pollen season.In total, 34 children with pollen-induced rhinitis and 36 with pollen-induced asthma and rhinitis, were enrolled and assigned to three study groups: group 1 (n = 17 patients): conventional pre-seasonal-SLIT treatment; group 2 (n = 23 patients), seasonal SLIT ended before the pollen seasonal peak; group 3 (n = 30 patients), SLIT began after the pollen seaso…
Baeyer—Villiger Oxidation in Supercritical CO2 with Potassium Peroxomonosulfate Supported on Acidic Silica Gel.
2006
Supercritical carbon dioxide (scCO2) is an efficient reaction medium to perform the Baeyer-Villiger oxidation with hydrated silica-supported potassium peroxomonosulfate (h-SiO2.KHSO5) under flow-through conditions. Hydration modulates the reactivity of the active surface by softening the acidity of the KHSO4 present in the supported reagent. The reaction in scCO2 is much more efficient than in n-hexane under similar conditions, which is attributed to better transport and solvating properties of the supercritical medium with regard to n-hexane.
Baeyer–Villiger oxidation of ketones with a silica-supported peracid in supercritical carbon dioxide under flow conditions
2009
[2-Percarboxyethyl]-functionalized silica reacts with ketones in supercritical carbon dioxide at 250 bar and 40 °C under flow conditions to yield the corresponding esters and lactones. The solid reagent can be easily recycled through treatment with 70% hydrogen peroxide in the presence of an acid at 0 °C. This procedure not only simplifies the isolation of the reaction products, but has the advantage of using only water and carbon dioxide as solvents under mild conditions.
Classification of SD-OCT volumes with multi pyramids, LBP and HOG descriptors: application to DME detections.
2016
This paper deals with the automated detection of Diabetic Macular Edema (DME) on Optical Coherence Tomography (OCT) volumes. Our method considers a generic classification pipeline with preprocessing for noise removal and flattening of each B-Scan. Features such as Histogram of Oriented Gradients (HOG) and Local Binary Patterns (LBP) are extracted and combined to create a set of different feature vectors which are fed to a linear-Support Vector Machines (SVM) Classifier. Experimental results show a promising sensitivity/specificity of 0.75/0.87 on a challenging dataset.
Refractive analysis of the human cornea through propagated fields
2001
A new technique for analysing the optical quality of the human cornea is presented. Corneal maps are obtained through keratographies and then converted into phase maps. The propagated fields generated from this surface are plotted and studied. It is shown that any irregularity in the cornea affects the propagated field and the energy distribution at the focal plane. Simple applications are also indicated.
Spontaneous extrusion of male genital pearling
2021
Pearling is a practice of inserting small beads beneath the skin of the genitalia. Patients generally underwent this practice believing that this would have made their penis bigger and able to better satisfy their partners during intercourse. Pearling can cause complications. We report a case of spontaneous extrusion of genital pearling exiting in a granuloma of the inner face of the foreskin.
Słowo, które staje się obrazem, w tradycji chrześcijan syryjskich
2017
Artykuł podejmuje problematykę sztuki figuratywnej w teologicznej przestrzeni tradycji Kościołów syryjskich. Chociaż wspólnoty te w początkowym stadium rozwoju stanowiły integralną część Cesarstwa Wschodniorzymskiego, to jednak wypracowały zupełnie inny model obrazowania, którym nie są ikony czy też inne formy malarskie. Głównym sposobem malowania teologii było dla Syryjczyków słowo. Taki stan rzeczy nie wynikał bezpośrednio z odziedziczonego po judaizmie zakazu wyobrażeń sacrum czy jakiegoś wewnętrznego ikonoklazmu, ale z mentalności i wrażliwości ludów Bliskiego Wschodu. Autor, odwołując się do trzech pisarzy syryjskich – Efrema, Afrahata i Jakuba z Sarug – prezentuje kilka przykładów tek…