active vision
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Technology within the home environment is becoming widely accepted as a means to facilitate independent living. Nevertheless, practical issues of detecting different tasks between multiple persons within the same environment along with managing instances of uncertainty associated with recorded sensor data are two key challenges yet to be fully solved. This work presents details of how computer vision techniques can be used as both alternative and complementary means in the assessment of behaviour in home based sensorised environments. Within our work we assessed the ability of vision processing techniques in conjunction with sensor based data to deal with instances of multiple occupancy. Our Results indicate that the inclusion of the video data improved the overall process of task identification by detecting and recognizing multiple people in the environment using color based tracking algorithm.
- MeSH
- algoritmy MeSH
- audiovizuální záznam MeSH
- činnosti denního života MeSH
- lidé MeSH
- pohyb MeSH
- pomůcky pro sebeobsluhu MeSH
- postižení zákonodárství a právo MeSH
- reprodukovatelnost výsledků MeSH
- studie pohybu a času MeSH
- vnímání pohybu fyziologie MeSH
- životní prostředí MeSH
- zrak * MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The field of advanced digital signal processing methods is one of the fastest developing scientific and technical disciplines, and is important in the field of Shunt Active Power Filter control methods. Shunt active power filters are highly desirable to minimize losses due to the increase in the number of nonlinear loads (deformed power). Currently, there is rapid development in new adaptive, non-adaptive, and especially hybrid methods of digital signal processing. Nowadays, modern methods of digital signal processing maintain a key role in research and industrial applications. Many of the best practices that have been used to control shunt active power in industrial practice for decades are now being surpassed in favor of new progressive approaches. This systematic research review classifies the importance of using advanced signal processing methods in the field of shunt active power filter control methods and summarizes the extant harmonic extraction methods, from the conventional approach to new progressive methods using genetic algorithms, artificial intelligence, and machine learning. Synchronization techniques are described and compared as well.
In a retrospective study of 397 children operated in the course of 10 years (1985-1995) on account of essential infantile esotropia the authors evaluate the effect of early surgery implemented before the age of two years on the quality of binocular vision as compared with a later operation. The group of children was divided into three sub-groups. Group A comprised 75 children with the operation during the first six months of life (mean 3.8 months), sub-group B 194 children with the operation at the age of 6-24 months and in group C 128 children operated at the age of 2-6 years (mean 3.56 years). In group A binocular vision was recorded in 80% children (15% superposition, 60% fusion, 5% stereopsy). In groups B binocular vision was recorded in 76% children (18% superposition, 50% fusion, 8% stereopsy). In group C simple binocular vision in the form of superposition was present in 24% and fusion only in 21% children. The results of binocular vision after surgery of essential infantile esotropia are in favour of early surgery, preferably by the age of 6 months, not later than at the age of 2 years. An essential part of comprehensive treatment is active and positive pleoptic and orthoptic care incl. supplementary surgical correction of residual horizontal or vertical deviations. Early surgery of an adequate extent with a safeguarded parallel position of the eyes implies in the long run more frequent achievement of a higher quality of binocular vision incl. stereopsy.
Since 2012, the European Radiation Dosimetry Group (EURADOS) has developed its Strategic Research Agenda (SRA), which contributes to the identification of future research needs in radiation dosimetry in Europe. Continued scientific developments in this field necessitate regular updates and, consequently, this paper summarises the latest revision of the SRA, with input regarding the state of the art and vision for the future contributed by EURADOS Working Groups and through a stakeholder workshop. Five visions define key issues in dosimetry research that are considered important over at least the next decade. They include scientific objectives and developments in (i) updated fundamental dose concepts and quantities, (ii) improved radiation risk estimates deduced from epidemiological cohorts, (iii) efficient dose assessment for radiological emergencies, (iv) integrated personalised dosimetry in medical applications and (v) improved radiation protection of workers and the public. This SRA will be used as a guideline for future activities of EURADOS Working Groups but can also be used as guidance for research in radiation dosimetry by the wider community. It will also be used as input for a general European research roadmap for radiation protection, following similar previous contributions to the European Joint Programme for the Integration of Radiation Protection Research, under the Horizon 2020 programme (CONCERT). The full version of the SRA is available as a EURADOS report (www.eurados.org).
- MeSH
- dávka záření MeSH
- ionizující záření MeSH
- lidé MeSH
- monitorování radiace * MeSH
- radiační ochrana * MeSH
- radiometrie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Evropa MeSH
The neural encoding of visual features in primary visual cortex (V1) is well understood, with strong correlates to low-level perception, making V1 a strong candidate for vision restoration through neuroprosthetics. However, the functional relevance of neural dynamics evoked through external stimulation directly imposed at the cortical level is poorly understood. Furthermore, protocols for designing cortical stimulation patterns that would induce a naturalistic perception of the encoded stimuli have not yet been established. Here, we demonstrate a proof of concept by solving these issues through a computational model, combining (1) a large-scale spiking neural network model of cat V1 and (2) a virtual prosthetic system transcoding the visual input into tailored light-stimulation patterns which drive in situ the optogenetically modified cortical tissue. Using such virtual experiments, we design a protocol for translating simple Fourier contrasted stimuli (gratings) into activation patterns of the optogenetic matrix stimulator. We then quantify the relationship between spatial configuration of the imposed light pattern and the induced cortical activity. Our simulations in the absence of visual drive (simulated blindness) show that optogenetic stimulation with a spatial resolution as low as 100 [Formula: see text]m, and light intensity as weak as [Formula: see text] photons/s/cm[Formula: see text] is sufficient to evoke activity patterns in V1 close to those evoked by normal vision.
- MeSH
- lidé MeSH
- oční protézy MeSH
- optogenetika metody MeSH
- ověření koncepční studie MeSH
- světelná stimulace metody MeSH
- teoretické modely MeSH
- zraková percepce MeSH
- zrakové dráhy MeSH
- zrakové korové centrum fyziologie MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Klíčová slova
- CENTRAL NERVOUS SYSTEM *, DECEREBRATE STATE *, HEARING *, REFLEX, CONDITIONED *, SURGERY, OPERATIVE *, VISION *,
- MeSH
- centrální nervový systém * MeSH
- chirurgie operační * MeSH
- decerebrační rigidita * MeSH
- klasické podmiňování * MeSH
- psi MeSH
- reflex * MeSH
- sluch * MeSH
- vyšší nervová činnost * MeSH
- zrak * MeSH
- zvířata MeSH
- Check Tag
- psi MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Klíčová slova
- VISION/physiology *,
- MeSH
- klasické podmiňování * MeSH
- lidé MeSH
- oči - fyziologické jevy * MeSH
- zrak fyziologie MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- Klíčová slova
- ADAPTATION, OCULAR *, CATS *, CEREBRAL CORTEX *, ELECTROPHYSIOLOGY *, EXPERIMENTAL LAB STUDY *, VISION *,
- MeSH
- adaptace oční * MeSH
- elektrofyziologie * MeSH
- evokované potenciály * MeSH
- kočky MeSH
- mozková kůra * MeSH
- výzkum * MeSH
- zrak * MeSH
- Check Tag
- kočky MeSH
- Publikační typ
- časopisecké články MeSH
AIM: To monitor and evaluate the differences in the evaluation of monitored indicators of quality of life of patients with proliferative and non-proliferative diabetic retinopathy (DR). METHODS: The research sample comprised a total of 80 patients with DR.The first group consisted of 27 patients with proliferative diabetic retinopathy and the second group of 53 patients with non-proliferative diabetic retinopathy. The comparison was carried out according to the degree of DR. The data were collected using the standardized National Eye Institute Visual Function Questionnaire (NEI VFQ-25). RESULTS: In both compared patient groups, T-tests showed significant differences in all studied quality of life parameters: general health and vision, difficulty seeing far away and up close, the impact of the disease on achieving life goals, being limited in control over and in length of their activities, being limited to their homes, relying on the information provided by other people and needing help from others. CONCLUSION: In a holistic concept, i.e. biological, psychological and social dimensions, partial or complete loss of the ability to see due to diabetes has a negative impact on the quality of life of patients with proliferative DR. Therefore, this chronic complication must be prevented by any available means.
- Klíčová slova
- Vision, diabetic macula edema, diabetic retinopathy, quality of life, visual impairment,
- MeSH
- diabetes mellitus * MeSH
- diabetická retinopatie * MeSH
- kvalita života MeSH
- lidé MeSH
- průzkumy a dotazníky MeSH
- zrak MeSH
- zraková ostrost MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
