Conjugated Cavity with the Wide Field of Vision

Author(s):  
A. F. Kornev ◽  
V. P. Pokrovsky ◽  
L. N. Soms ◽  
V. K. Stupnikov ◽  
V. Yu. Venediktov
Keyword(s):  
2019 ◽  
Vol 141 (7-8) ◽  
pp. 196-204

Functional dizziness is noted for its frequency and is the second most common cause of dizziness in the general population, most prevalent in the age group of 30–50 years. The classic diagnostic process is aimed at finding a medical or surgical diagnosis, and in case it is not found, it is said to be caused by a “psychogenic” disease. In recent decades, using a new, integrative way of thinking, there has been a discovery of functional vestibular disorders. They have always been overcome by acute or back vestibular disease due to poor readout of the postural system. The reason for this lies in a close connection to the brain of nerve projections responsible for controlling motion and position of the body in space with those responsible for danger and fear. The Nomenclature and Classification Committee of Barany’s Vestibular Disorders recently established diagnostic criteria for persistent postural-perceptive dizziness (PPPD). This is the most common functional vestibular disorder, which includes the previously established: persistent postural dizziness, visual and chronic subjective dizziness. The dominant symptom of PPPD is non-rotatory dizziness that lasts for at least three months continuously and is always associated with the condition of the body. The hypersensitivity to moving stimuli occurs, including the movements of large visual objects or complex visual stimuli in a wide field of vision and the difficulty of performing precision visual actions. For mild and moderate interferences it is advisable to conduct vestibular rehabilitation, as most patients have provocative factors related to vision and movement. Individually tailored exercises are used to reduce susceptibility to provocative movements, and conditioning exercises are very useful for repairing disturbed body posture. Pharmacotherapeutic treatment with selective serotonin or serotonin and norepinephrine reuptake inhibitors is also indicated. Good results are achieved by the use of cognitive-behavioural psychotherapy, changing of negative automatic thoughts, refocusing attention, re-allocation, systematic and gradual exposure or exposure at once, biofeedback etc. The prognosis of the disease is better in patients without comorbidity, while in those with comorbidity it is significantly worse.


PEDIATRICS ◽  
1959 ◽  
Vol 23 (5) ◽  
pp. 985-989
Author(s):  
Frank Duncan Costenbader

I AM PLEASED to be included on a panel discussing the special senses in conjunction with intelligence and certain skills. It would seem that in so grouping these subjects, the eyes, the ears and the other senses have no longer been considered isolated phenomena but as parts of an integrated whole. It seems important at this early point in the discussion to emphasize the fact that the term "vision" is frequently misused, usually only connoting visual acuity. It should be emphasized that vision in its broadest sense includes visual acuity, the extent of the fields of vision, the normality or abnormality of binocular vision, and the adequacy of the visual associations such as recognition, identification and memory. It seems superfluous to point out that excellent visual acuity, if seen through a gun barrel, is by no means satisfying. Also, that a full, wide field of vision, when the object of interest is blurred, is most unsatisfactory. Having two eyes, each of which is a perfect unit, but not seeing together well and comfortably, is most annoying and handicapping. Finally, referring back to the brain a perfect visual image, which cannot be properly recognized and identified and then correlated with similar images previously received, is a totally frustrating experience. Thus, for a child "to see well" he must see clearly the thing he looks straight at, he must see widely the things about him, as well as the object of interest, he must have his two eyes properly co-ordinated, and he must be able to recognize, identify and associate this image with related images and activities of the past.


Author(s):  
Stefano Cagnoni ◽  
Monica Mordonini ◽  
Luca Mussi ◽  
Giovanni Adorni

Many of the known visual systems in nature are characterized by a wide field of view allowing animals to keep the whole surrounding environment under control. In this sense, dragonflies are one of the best examples: their compound eyes are made up of thousands of separate light-sensing organs arranged to give nearly a 360° field of vision. However, animals with eyes on the sides of their head have high periscopy but low binocularity, that is their views overlap very little. Differently, raptors’ eyes have a central part that permits them to see far away details with an impressive resolution and their views overlap by about ninety degrees. Those characteristics allow for a globally wide field of view and for accurate stereoscopic vision at the same time, which in turn allows for determination of distance, leading to the ability to develop a sharp, three-dimensional image of a large portion of their view. In mobile robotics applications, autonomous robots are required to react to visual stimuli that may come from any direction at any moment of their activity. In surveillance applications, the opportunity to obtain a field of view as wide as possible is also a critical requirement. For these reasons, a growing interest in omnidirectional vision systems (Benosman 2001), which is still a particularly intriguing research field, has emerged. On the other hand, requirements to be able to carry out object/pattern recognition and classification tasks are opposite, high resolution and accuracy and low distortion being possibly the most important ones. Finally, three-dimensional information extraction can be usually achieved by vision systems that combine the use of at least two sensors at the same time. This article presents the class of hybrid dual camera vision systems. This kind of sensors, inspired by existing visual systems in nature, combines an omnidirectional sensor with a perspective moving camera. In this way it is possible to observe the whole surrounding scene at low resolution, while, at the same time, the perspective camera can be directed to focus on objects of interest with higher resolution.


2020 ◽  
Vol 2 (3) ◽  
pp. 23-24
Author(s):  
Meric Balikoglu ◽  
Burak Bayraktar ◽  
Esra Saygılı ◽  
Emrah Beyan

Abdominal pregnancy is a rare form of ectopic pregnancy. maternal deaths due to an abdominal ectopic pregnancy are 8 times higher than tubal ectopic pregnancy. Greater awareness is required in the diagnosis and treatment of abdominal pregnancy. Thirtyseven years old and the multiparous patient who was admitted to the emergency room with the findings of the acute abdomen. In the evaluation, ectopic pregnancy focus was not detected clearly in the patient who had bleeding in the abdomen. In the laparoscopic surgery of the patient who was hypotensive, abdominal pregnancy in the posterior surface of uterine was resected successfully. Due to abdominal pregnancy can be observed on the surface of the spleen, omentum and appendix, the laparoscopic approach should be preferred in the treatment because it provides a wide field of vision.


1997 ◽  
Author(s):  
A. F. Kornev ◽  
V. P. Pokrovsky ◽  
V. K. Stupnikov ◽  
Vladimir Y. Venediktov
Keyword(s):  

2021 ◽  
Vol 1 (2) ◽  
pp. 99-108
Author(s):  
Hocine Chebi ◽  
Dalila Acheli ◽  
Mohamed Kesraoui

The analysis of the human behavior from video is a wide field of the vision by computer. In this work, we are presenting mainly a new approach and method of detects behavior or abnormal events continuous of crowd in the case of the dangerous situations. These scenes are characterized by the presence of a great number of people in the camera’s field of vision. A major problem is the development of an autonomous approach for the management of a great number of anomalies which is almost impossible to carry out by operators. We present in this paper an approach for the anomalies detection, the visual sequences of the video are detected like behavior normal or abnormal based on the measurement and the extraction of the points by the optical flow, then calculations of the distance between the matrices of covariance of the distributions of the vectors of movement calculated on the consecutive reinforcements.


Biologia ◽  
2012 ◽  
Vol 67 (3) ◽  
Author(s):  
Hong Li ◽  
Ping Zhang

AbstractSystems genetics is a new discipline based on the transcription mapping, which is also called “genetical genomics”. In recent years, systems genetics has become more practical because of advances in science and technology. Analysis of expression quantitative trait loci (eQTLs) is an emerging technique in which individuals are genotyped across a panel of genetic markers and, simultaneously, phenotyped using DNA microarrays. Depending on eQTL mapping, one can infer the underlying regulatory network responsible for complex diseases or quantitative trait phenotypes. Systems genetics approaches integrate DNA sequence variation, variation in transcript abundance and other molecular phenotypes and variation in organismal phenotypes in a linkage or association mapping population, and allow us to interpret quantitative genetic variation in terms of biologically meaningful causal networks of correlated transcripts. These approaches have been made possible due to the development of massively parallel technologies for quantifying genome-wide levels of transcript abundance. The predictive power of the networks could be enhanced by more systematically integrating protein-protein interactions, protein-DNA interactions, protein-RNA interactions, RNA-RNA interactions, protein state information, methylation state, and interactions with metabolites. Systems genetics research will change the traditional approaches based on reductionism, and allows us to reconsider the living phenomenon and complex disease mechanism. Systems genetics benefits from varied “omics” researches (such as transcriptomics, metabolomics, and phenomics) and the development of bioinformatics tools and mathematical modeling, and will become mature in the near future like many other branches of genetics. Systems genetics is leading researchers to understand genetics systems from holism’s viewpoint, and will open a wide field of vision for genetics researchers in systems biology era.


Author(s):  
A.F. Kornev ◽  
V.P. Pokrovsky ◽  
V.K. Stoupnikov ◽  
V.Y. Venediktov
Keyword(s):  

Author(s):  
M. G. Lagally

It has been recognized since the earliest days of crystal growth that kinetic processes of all Kinds control the nature of the growth. As the technology of crystal growth has become ever more refined, with the advent of such atomistic processes as molecular beam epitaxy, chemical vapor deposition, sputter deposition, and plasma enhanced techniques for the creation of “crystals” as little as one or a few atomic layers thick, multilayer structures, and novel materials combinations, the need to understand the mechanisms controlling the growth process is becoming more critical. Unfortunately, available techniques have not lent themselves well to obtaining a truly microscopic picture of such processes. Because of its atomic resolution on the one hand, and the achievable wide field of view on the other (of the order of micrometers) scanning tunneling microscopy (STM) gives us this opportunity. In this talk, we briefly review the types of growth kinetics measurements that can be made using STM. The use of STM for studies of kinetics is one of the more recent applications of what is itself still a very young field.


2013 ◽  
Vol 183 (8) ◽  
pp. 888-894
Author(s):  
G.M. Beskin ◽  
S.V. Karpov ◽  
V.L. Plokhotnichenko ◽  
S.F. Bondar ◽  
A.V. Perkov ◽  
...  

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