35 research outputs found
New Generation Software-Only Architecture for Gaze-Contingent Eyetracking Experimentation
No full textThe author shares 10+ years of experience in eyetracking research. Most crucial technicalities are described, different programming approaches are discussed. Network Time Protocol [19] application to data stream synchronization is reviewed separately, which renders phototransistor on-screen sensors partially redundant in some of psychophysics disciplines (known as TTL hardware).</p
The Demidoff Church in the San Donato Estate in Florence
Get PDFThe article is about the decoration of the former Demidoffs’ house church in the villa of San
Donato. A part of it is now located in the church of the Nativity of Christ and St. Nicholas
the Thaumaturge in Florence (architect M. T. Preobrazhensky). The author has suggested the
probable appearance of the house church in the villa of San Donato based on notes of contemporaries,
analysis of the palace’s blueprints and the remaining elements of the decoration.
The ecclesiastical purpose of the surviving building of the “Demidoffs ex-chapel” has been
questioned and analyzed, based on D. Silvestri’s original sketches, from which it follows that
this is the building of the Odeon — a concert and theater hall. Particular attention is paid to
the carved decoration of the church, made in A. Barbetti’s workshop, to the iconostasis and
the gallery of local and small icons. Local icons of the iconostasis and icons of the apostles executed
in an academic manner by famous religious painter V. V. Vasilyev. However, the gallery
of small icons of the second tier of the iconostasis and the doors-kiots is stylistically close to
the icon-painting of the 17th century. Also, based on historical analysis and analysis of style,
the author sets up a hypothesis that the gallery of small icons from Demidoffs’ church belong
to “Nevyansk” or “Peshekhonovsk” icon-painting schools
Visual Perception of Facial Emotional Expressions during Saccades
No full textThe regularities of visual perception of both complex and ecologically valid objects during extremely short photo expositions are studied. Images of a person experiencing basic emotions were displayed for as low as 14 ms amidst a saccade spanning 10 degrees of visual angle. The observers had a main task to recognize the emotion depicted, and a secondary task to point at the perceived location of the photo on the screen. It is shown that probability of correct recognition of emotion is above chance (0.62), and that it depends on its type. False localizations of stimuli and their compression in the direction of the saccade were also observed. According to the acquired data, complex environmentally valid objects are perceived differently during saccades in comparison to isolated dots, lines or gratings. The rhythmic structure of oculomotor activity (fixation–saccade–fixation) does not violate the continuity of the visual processing. The perceptual genesis of facial expressions does not take place only during gaze fixation, but also during peak speed of rapid eye movements both at the center and in closest proximity of the visual acuity area
Pattern recognition of electromagnetic field scattering from anthropogenic objects on underlying surface
No full textSupport subspaces method for synthetic aperture radar automatic target recognition
No full textThis article offers a new object recognition approach that gives high quality using synthetic aperture radar images. The approach includes image preprocessing, clustering and recognition stages. At the image preprocessing stage, we compute the mass centre of object images for better image matching. A conjugation index of a recognition vector is used as a distance function at clustering and recognition stages. We suggest a construction of the so-called support subspaces, which provide high recognition quality with a significant dimension reduction. The results of the experiments demonstrate that the proposed method provides higher recognition quality (97.8%) than such methods as support vector machine (95.9%), deep learning based on multilayer auto-encoder (96.6%) and adaptive boosting (96.1%). The proposed method is stable for objects processed from different angles
Probability of Visually Perceiving Emotional Expression During Saccade is Rising, not Being Suppressed
No full textComparative pharmacokinetics and pharmacodinamics of noopept, its activity metabolite cycloprolylglycine and piracetam
Get PDFWhile studing of experimental pharmacokinetics of the peptide analogues piracetam noopept - N-phenylacetyl-L-prolyl-glycine ethyl ester, was found the active metabolite that identificated as cyclo-L-prolylglycine (CPG). At that thime CPG was detected as the endogenous compound in plasma and brain. It was found that the pharmacokinetic parameters of CPG have the better characteristics than noopept and its prototype piracetam for the longer period of eliminations and the best bioavailability for the brain. It is found that the spectrum of nootropic and anxiolytic activity CPG and piracetam are composed. For piracetam also found antihypoxic and neuroprotective effects that were not investigated for CPG. Furthermore while studying of the pharmacological activity was found significant differences in the effective doses of comparable drugs that were no described by their different pharmacokinetics. This paper presents the results of comparative study of the antihypoxic and neuroprotective effects of CPG and piracetam in comparision wich pharmacokinetic parameters of studied compounds
