We fully characterize orthogonal projections of infinite right circular (round) cones in real Hilbert spaces. Another interpretation is that, given two vectors in a real Hilbert space, we establish the optimal estimate on the angle between the orthogonal projections of the two vectors. The estimate depends on the angle between the two vectors and the position of only one of the two vectors. Our...

Background:Antioxidant effects of cypress cones extract have been previously demonstrated. In this study, the protective effect of cypress cones extract was investigated. Gentamicin, an aminoglycoside antibiotic administrated for the treatment of gram-negative bacteria infections, was used for nephrotoxicity induction. Methods: In this study, 60 wistar male ra...

In this work, we study the weak and strong gravitational lensing in presence of an accelerating black hole a universe with positive cosmological constant $\Lambda$. First all, derive new perturbative formulae for event horizons terms Schwarzschild, acceleration scales. agreement previous results literature, find that null circular orbits certain families orbital cones originating from saddle po...

In this study, we provide a mathematical description of the onset of counter-rotating circular vortices observed for a family of slender rotating cones (of half-angles 15◦, 30◦ and 45◦) in quiescent fluid. In particular, we apply appropriate scalings and apply a change of coordinates, accounting for the effects of streamline curvature. A combined large Reynolds number and large vortex wavenumbe...

The big eye kilka, Clupeonella grimmi, is a marine fish living in depth of 20 to 200 meter of the Caspian Sea. Its eye and retina were processed for histological and SEM studies. Paraffin embedded retina was cut radially and tangentially in 5 ?m thickness and stained with hematoxylin and eosin method. The unstained sections were manipulated for SEM image observations. Tangential retinal sect...

Cones and wedges inserted between an ultrasonic transducer and the specimen provide the transducer (circular or rectangular shape) with enhanced capability for point or line contact with the specimen. Such an arrangement is useful in that the transducer can be used for transmitting to and receiving from a point (or line) source, and that it can eliminate the undesirable aperture effect that mak...

Scoria cones are favorite targets of morphometric research. However, in-depth, DTM-based studies have appeared only recently, and new methods being developed. This study provides a classic evaluation the Chaîne des Puys (Auvergne, France) as well introduces more detailed statistics-based set properties. Beside parameters, sectorial approach is applied to slope distributions calculated from high...

On 15 May 2021, the Zhurong rover of China’s first Mars mission, Tianwen-1 (TW-1), successfully landed in southern Utopia Planitia on Mars. Various landforms were present landing area, and this area recorded a complex geological history. Cones are one typical Planitia, they have great significance to local processes due diversity their origins. Using High-Resolution Imaging Camera (HiRIC) image...

Shatter Cones; history and significance: A distinct, striated conical rock failure occurs at many terrestrial impact structures. Conical limestone fragments with radiating surface grooves were first reported by Branco and Frass [1] at Steinheim Basin, Germany in 1905. They ascribed the 4 km wide depression to deeply buried explosive magma which failed to reach the surface during a ‘crypto volca...

Characterizing the shape and evolution of pulsar radio emission beams is important for understanding the observed emission. The various attempts by earlier workers investigating beam shapes have resulted in widely different conclusions. Using a carefully selected subset of the recently published multifrequency polarimetry observations of 300 radio pulsars (Gould & Lyne, 1998), we attempt to mod...