2,250 research outputs found

    Video Resolution Enhancement using DWT, SWT and CLAHE

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    One of an image details which has been always an vital concern in various image and video-processing applications, such as video resolution enhancement, feature extraction, and satellite image resolution enhancement is resolution. In recent advances Video Resolution enhancement has been envisioned to help in numerous applications and has turned out to be a hot research area. This opens up several technical challenges and immense application possibilities. The paper describes the three main categories - Contrast limited adaptive histogram equalisation (CLAHE), Discrete Wavelet Transform(DWT), Stationary Wavelet Transform(SWT). DWT uses filter for building the multi-resolution. SWT is an extension of the Standard Discrete Wavelet Transform to enhance the general details of an image. This study presents a novel resolution enhancement methods with future research are

    Structure of the herpes-simplex virus portal-vertex

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    Herpesviruses include many important human pathogens such as herpes simplex virus, cytomegalovirus, varicella-zoster virus, and the oncogenic Epstein–Barr virus and Kaposi sarcoma–associated herpesvirus. Herpes virions contain a large icosahedral capsid that has a portal at a unique 5-fold vertex, similar to that seen in the tailed bacteriophages. The portal is a molecular motor through which the viral genome enters the capsid during virion morphogenesis. The genome also exits the capsid through the portal-vertex when it is injected through the nuclear pore into the nucleus of a new host cell to initiate infection. Structural investigations of the herpesvirus portal-vertex have proven challenging, owing to the small size of the tail-like portal-vertex–associated tegument (PVAT) and the presence of the tegument layer that lays between the nucleocapsid and the viral envelope, obscuring the view of the portal-vertex. Here, we show the structure of the herpes simplex virus portal-vertex at subnanometer resolution, solved by electron cryomicroscopy (cryoEM) and single-particle 3D reconstruction. This led to a number of new discoveries, including the presence of two previously unknown portal-associated structures that occupy the sites normally taken by the penton and the Ta triplex. Our data revealed that the PVAT is composed of 10 copies of the C-terminal domain of pUL25, which are uniquely arranged as two tiers of star-shaped density. Our 3D reconstruction of the portal-vertex also shows that one end of the viral genome extends outside the portal in the manner described for some bacteriophages but not previously seen in any eukaryote viruses. Finally, we show that the viral genome is consistently packed in a highly ordered left-handed spool to form concentric shells of DNA. Our data provide new insights into the structure of a molecular machine critical to the biology of an important class of human pathogens

    Uniplanar nystagmus associated with perceptual and cognitive visual dysfunction due to presumed focal ischemic occipital cortical atrophy: a missed diagnosis and new observation

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    Uniplanar nystagmus has been described in relation to pathology of the brain stem, retina, optic nerve, sensory visual deprivation, periventricular leucomalacia, and drug toxicity. This paper describes a case of uniplanar nystagmus associated with features of higher visual dysfunction and a presumed focal insult to the occipital lobes following an episode of neonatal apnea

    Redesigning the Brain: The Effect of Bilingualism on Neuroplasticity

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    Neuroplasticity is a relatively new subject of study in the past few decades. One’s genetic background and environmental adaptations, are known to lay the foundation for one’s capacity for neuroplasticity. This study focuses on bilingualism to examine the relative effects of genetic expression and environmental background on cognitive performance in those who are bilingual. Peer-reviewed scientific journals and recent studies were referenced to understand these correlations. Bilingualism has been found to have physiological effects that leads to greater connectivity in the brain, and ultimately, greater ability for cognitive development. Although concrete ratios of the influences of genetics to environment on neuroplasticity have not been found, future research on academic performance in relation to genetics and environment could help bolster current research findings on fostering neuroplasticity.https://scholarscompass.vcu.edu/uresposters/1031/thumbnail.jp

    Turning function and shape recognition

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    The technique of turning function is a powerful method for measuring similarity between two dimensional shapes. The method works well when the boundary of the shape does not contain noise edges. We propose an algorithm for smoothing noise edges by decomposing the boundary into monotone components and smoothing the noise edges in each component. We also present an implementation of the proposed smoothing algorithm

    BETWEEN THE SKY AND EARTH

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    Between The Sky And Earth is a collection of short stories that takes place in India, and in America, capturing the lives of Indian immigrants, and a cat, from different walks of life, some made up of students who came to pursue the American dream. The time span ranges between the early to late 2000s, capturing some significant events like farmer suicide and undocumented immigrants. These stories explore grief, trauma, identity, displacement, and relationships, focusing primarily on the consequences of losing loved ones, and unexpected mishaps that lead to a life and death situation. A couple of the stories grapple with the idea of establishing an identity through a profession or battling societal prejudices regarding gender and sexuality. The setting ranges from rural landscapes in India, a literary awards night, the desert, underwater, and to the Bay Area. The protagonists’ lives intersect in the most unexpected manner—they believe that their lives still have a purpose despite facing tragic moments
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