In many retinal diseases, the malfunction that results in photoreceptor loss occurs only in either rods or cones, but degeneration can progress from the affected cell type to its healthy neighbors. Specifically, in human and mouse models of Retinitis Pigmentosa the loss of rods results in the death of neighboring healthy cones. Significantly less is known about cone-initiated degenerations and ...

Using the T -algebra machinery we show that the only strictly convex homogeneous cones in R with n ≥ 3 are the 2-cones, also known as Lorentz cones or second order cones. In particular, this shows that the p-cones are not homogeneous when p 6= 2, 1 < p <∞ and n ≥ 3, thus answering a problem proposed by Gowda and Trott.

OBJECTIVES To evaluate the effectiveness of chlorhexidine (CHX) or sodium hypochlorite (NaOCl) in disinfecting gutta-percha cones, to verify contamination of gutta-percha cones in their boxes, and to identify microorganisms after intentional contamination by handling cones. STUDY DESIGN Gutta-percha cones contaminated in vitro with several microorganisms were left in contact with tested disin...

We consider two models of random cones together with their duals. Let Y 1 , ⋯ n $Y_1,\dots ,Y_n$ be independent and identically distributed vectors in R d $\mathbb {R}^d$ whose distribution satisfies some mild condition. The G A $G_{n,d}^A$ B $G_{n,d}^B$ are defined as the positive hulls pos { − 2 } $\mbox{pos}\lbrace Y_1-Y_2,\dots ,Y_{n-1}-Y_n\rbrace$ respectively, ,Y_{n-1}-Y_n,Y_n\rbrace$ con...

We investigated the physical and burning characteristics of sugar pine (Pinus lambertiana Douglas) cones and their contribution to woody surface fuel loadings. Field sampling was conducted at the Yosemite Forest Dynamics Plot (YFDP), a 25.6 ha mapped study plot in Yosemite National Park, California, USA. We developed a classification system to describe sugar pine cones of different sizes and de...

Under constant light-adapted conditions, vision seems to be rather linear. However, the processes underlying the synaptic transmission between cones and second-order neurons (bipolar cells and horizontal cells) are highly nonlinear. In this paper, the gain-characteristics of the transmission from cones to horizontal cells and from horizontal cells to cones are determined with and without negati...