Search results for "Eye"
showing 10 items of 2511 documents
Identification of Chinese fresh-water pearls using MN2+ activated cathodoluminescence
2000
Fresh-water tissue graft-cultured pearls from China were investigated using hot cathode and cold cathode cathodoluminescence microscopes. Supplementary investigations were done using X-radiography, a Scanning Electron Microscope, an optical microscope, and an Atomic Force Microscope (AFM). The results were compared with those of natural fresh-water pearls from the Mississippi river. Thin sections of fresh-water natural pearls from the Mississippi river could be distinguished from those of fresh-water tissue graft cultured pearls from China using a hot cathode cathodoluminescence microscope according to the distribution of Mn2+ as follows: (1) Fresh-water tissue graft cultured pearls from Ch…
A real-time webcam based Eye Ball Tracking System using MATLAB
2015
Eye Ball Tracking System is a device which is intended to assist patients that cannot perform any voluntary tasks related to daily life. Patients who only can control their eyes can still communicate with the real-world using the assistive devices like one proposed in this paper. This device provides a human computer interface in order to take decisions based on their eye movement. A real time data stream is captured via webcam that transfers data serially to MATLAB. Then a sequential image processing scheme segments the iris of the eye and calculates the centroid, thereby generating control signal with the help of a reference axis. The control signals are then used to manipulate the positi…
Hearing-impaired pupils in mainstream education in Finland: teachers’ experiences of inclusion and support
2017
Today, in Finland, the majority of hearing-impaired pupils attend regular schools. This is in line with inclusive policy. This study aims to investigate do these pupils receive support from teacher ...
Tecnologie e valori dello sguardo. Occhiali e discorsività
2021
What is that very special object in our daily lives that is a pair of spectacles all about? It accompanies us faithfully through every moment of the day, it crouches beside us when we do without, or it is stowed away in a bag, momentarily resting on a shelf. But it is always ready to come back and ride our noses and ears in order to perform its inalienable function to the best of its ability. Function? A notion as pernicious as it is indispensable when dealing with a sure design product such as spectacles. An unfortunate, polysemic, inflated term, problematised in a thousand ways; an intrusive and unwelcome guest, with whom one never ends up coming to terms. One sends him away and finds him…
Nxnl2 splicing results in dual functions in neuronal cell survival and maintenance of cell integrity
2012
International audience; The rod-derived cone viability factors, RdCVF and RdCVF2, have potential therapeutical interests for the treatment of inherited photoreceptor degenerations. In the mouse lacking Nxnl2, the gene encoding RdCVF2, the progressive decline of the visual performance of the cones in parallel with their degeneration, arises due to the loss of trophic support from RdCVF2. In contrary, the progressive loss of rod visual function of the Nxnl2-/- mouse results from a decrease in outer segment length, mediated by a cell autonomous mechanism involving the putative thioredoxin protein RdCVF2L, the second spliced product of the Nxnl2 gene. This novel signaling mechanism extends to o…
SOMATOTOPIC ORGANIZATION OF THE CRANIAL NERVE NUCLEI INVOLVED IN EYE MOVEMENTS: III, IV, VI.
2017
The oculomotor nucleus is divided into: 1. somatic medial column innervating the superior rectus muscle and somatic lateral column, further subdivided into a lateral column innervating the inferior rectus, inferior oblique and medial rectus muscles; 2. central nucleus innervating the levator palpebrae superioris muscle; 3. visceral nucleus innervating the pupillary sphincter muscle, consisting of the following two groups of neurons: cholinergic, preganglionic neurons supplying the ciliary ganglion, termed the Edinger- Westphal preganglionic (EWpg) neuron population, and the centrally projecting, peptidergic neurons, termed the Edinger-Westphal centrally projecting (EWcp) population. A detai…
Montatura polifunzionale per occhiali
2018
La presente invenzione ha come oggetto una montatura polifunzionale per occhiali, del tipo che consente la rapida sostituzione delle parti che la compongono. Tutti i componenti sono realizzabili con stampa ad iniezione, processo che ne rende i costi di produzione estremamente contenuti. L'assemblaggio avviene senza uso di viti o perni metallici. The present invention has as its object a multifunctional frame for eyeglasses, of the type which allows the rapid replacement of the parts that compose it. All components can be produced with injection molding, a process that makes production costs extremely low. Assembly is carried out without using screws or metal pins.
Cities inside the City on River Amstel
2017
Paramaribo, Curaçao, Jakarta. Se utilizzassimo il linguaggio gastronomico, potrebbero suonare rispettivamente come moksie alesie (il coloratissimo riso misto a carne, pollo, verdure, fagioli bianchi, peperoncino e latte di cocco), planteur (il rinfrescante long drink con il frutto di guava, ananas, melograno, arancia, rum agricolo, cannella e noce moscata), nasi goreng (il classico piatto unico indonesiano a base di riso fritto, pollo e gamberetti). Per gustarli tutti dovremmo compiere un impegnativo tour attorno al pianeta, dal Suriname alle isole caraibiche e spingerci fino all'Indonesia. Oppure potremmo scegliere un'alternativa forse più interessante: passeggiare comodamente tra i canali…
Exploiting Visual Saliency Algorithms for Object-Based Attention: A New Color and Scale-Based Approach
2017
Visual Saliency aims to detect the most important regions of an image from a perceptual point of view. More in detail, the goal of Visual Saliency is to build a Saliency Map revealing the salient subset of a given image by analyzing bottom-up and top-down factors of Visual Attention. In this paper we proposed a new method for Saliency detection based on colour and scale analysis, extending our previous work based on SIFT spatial density inspection. We conducted several experiments to study the relationships between saliency methods and the object attention processes and we collected experimental data by tracking the eye movements of thirty viewers in the first three seconds of observation o…
An on-line learning method for face association in personal photo collection
2012
Due to the widespread use of cameras, it is very common to collect thousands of personal photos. A proper organization is needed to make the collection usable and to enable an easy photo retrieval. In this paper, we present a method to organize personal photo collections based on ''who'' is in the picture. Our method consists in detecting the faces in the photo sequence and arranging them in groups corresponding to the probable identities. This problem can be conveniently modeled as a multi-target visual tracking where a set of on-line trained classifiers is used to represent the identity models. In contrast to other works where clustering methods are used, our method relies on a probabilis…