نتایج جستجو برای: cone models

تعداد نتایج: 946938  

Journal: :Physical review 2023

The chiral and superconducting gaps are studied in the context of a planar fermion model with four-fermion interactions. effect tilt Dirac cone on both is shown discussed. Our results point to two different behaviors exhibited by fermionic systems. We show that there threshold value $\tilde{t}^*$ for effective parameter such when $|{\bf \tilde{t}}| < \tilde{t}^*$, phase persists negative values...

2015
Manoj Kulkarni Timm Schubert Tom Baden Bernd Wissinger Thomas Euler Francois Paquet-Durand

Retinal cone photoreceptors (cones) serve daylight vision and are the basis of color discrimination. They are subject to degeneration, often leading to blindness in many retinal diseases. Calcium (Ca(2+)), a key second messenger in photoreceptor signaling and metabolism, has been proposed to be indirectly linked with photoreceptor degeneration in various animal models. Systematically studying t...

2010
J. Lakowski M. Baron J. Bainbridge A.C. Barber R.A. Pearson R.R. Ali J.C. Sowden

Retinal degenerative disease causing loss of photoreceptor cells is the leading cause of untreatable blindness in the developed world, with inherited degeneration affecting 1 in 3000 people. Visual acuity deteriorates rapidly once the cone photoreceptors die, as these cells provide daylight and colour vision. Here, in proof-of-principle experiments, we demonstrate the feasibility of cone photor...

Journal: :Investigative ophthalmology & visual science 2003
Aristofanis Pallikaris David R Williams Heidi Hofer

PURPOSE Individual cones were imaged in the living human eye with the Rochester adaptive optics ophthalmoscope. In all eyes, there were large differences in the reflectance of different cones, even when all the photopigment was bleached. To help understand what produces this spatial variation, the investigators explored whether it is a static or a dynamic property of the cone mosaic. METHODS ...

In this paper, we introduce the cone normed spaces and cone bounded linear mappings. Among other things, we prove the Baire category theorem and the Banach--Steinhaus theorem in cone normed spaces.

Journal: :Comp. Opt. and Appl. 2010
A. Pinto da Costa Alberto Seeger

Equilibria in mechanics or in transportation models are not always expressed through a system of equations, but sometimes they are characterized by means of complementarity conditions involving a convex cone. This work deals with the analysis of cone-constrained eigenvalue problems. We discuss some theoretical issues like, for instance, the estimation of the maximal number of eigenvalues in a c...

2008
Ashok Balasundaram André Mol

Ashok Balasundaram: Cone beam Computed Tomography imaging of periodontal bone (Under the direction of Dr. André Mol) Cone beam computed tomography (CBCT) is a low-dose, low-cost three dimensional imaging modality used for several oral and maxillofacial applications. This project evaluated the accuracy of Cone-Beam CT imaging to assess periodontal alveolar bone. In Phase I, ground truth measurem...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2011
Sammy C S Lee Erin J Cowgill Ali Al-Nabulsi Emma J Quinn Sylvia M Evans Benjamin E Reese

The establishment of neuronal circuitry during development relies upon the action of cell-intrinsic mechanisms that specify neuronal form as well as plastic processes that require the transmission of neural activity between afferents and their targets. Here, we examine the role of interactions between neighboring like-type cells within the mouse retina upon neuronal differentiation and circuit ...

Journal: :Investigative ophthalmology & visual science 2010
Susanne C Beck Karin Schaeferhoff Stylianos Michalakis M Dominik Fischer Gesine Huber Norman Rieger Olaf Riess Bernd Wissinger Martin Biel Michael Bonin Mathias W Seeliger Naoyuki Tanimoto

PURPOSE To identify individual cone photoreceptors in a transgenic mouse line in vivo based on selective expression of green fluorescent protein (GFP) using cSLO (confocal scanning laser ophthalmoscopy) and to use this approach to monitor cone cell fate in mouse models of retinal degeneration. METHODS Transgenic mice expressing GFP under the control of a red-green opsin promoter (RG-GFP mice)...

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