نتایج جستجو برای: conical fracture

تعداد نتایج: 101901  

2009
Claude A. Pruneau

We discuss the sensitivity of the three-particle azimuthal cumulant method for a search and study of conical emission in central relativistic A+A collisions. Our study is based on a multicomponent Monte Carlo model which include flow background, Gaussian mono-jets, jet-flow, and Gaussian conical signals. We find the observation of conical emission is hindered by the presence of flow harmonics o...

Journal: :Adv. Comput. Math. 2008
Helmut Pottmann Johannes Wallner

Circular meshes are quadrilateral meshes all of whose faces possess a circumcircle,whereas conicalmeshes areplanar quadrilateralmeshes where the faces which meet in a vertex are tangent to a right circular cone. Both are amenable to geometricmodeling – recently surface approximation and subdivision-like refinement processes have been studied. In this paper we extend the original defining proper...

Journal: :The journal of physical chemistry. A 2005
Spiridoula Matsika

The involvement of three-state conical intersections in the photophysics and radiationless decay processes of the nucleobases has been investigated using multireference configuration interaction methods. Three-state conical intersections have been located for the pyrimidine base, uracil, and the purine base, adenine. In uracil, a three-state degeneracy between the S(0), S(1), and S(2) states ha...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2010
Alexander P Petroff Min Sub Sim Andrey Maslov Mikhail Krupenin Daniel H Rothman Tanja Bosak

Stromatolites may be Earth's oldest macroscopic fossils; however, it remains controversial what, if any, biological processes are recorded in their morphology. Although the biological interpretation of many stromatolite morphologies is confounded by the influence of sedimentation, conical stromatolites form in the absence of sedimentation and are, therefore, considered to be the most robust rec...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Ivan Vlassiouk Pavel Y Apel Sergey N Dmitriev Ken Healy Zuzanna S Siwy

Single- and multiple-nanopore membranes are both highly interesting for biosensing and separation processes, as well as their ability to mimic biological membranes. The density of pores, their shape, and their surface chemistry are the key factors that determine membrane transport and separation capabilities. Here, we report silicon nitride (SiN) membranes with fully controlled porosity, pore g...

2000
Yutake Hiramine Norman L. Johnson

This article provides a classification of the partial conical flocks in PG(3,q) of (q-1) conics of a quadratic cone which admit a linear regular automorphism group on the conics.

Journal: :Eur. J. Comb. 2012
Mario Marietti Damiano Testa

We introduce and study the notions of conical and spherical graphs. We show that these mutually exclusive properties, which have a geometric interpretation, provide links between apparently unrelated classical concepts such as dominating sets, independent dominating sets, edge covers, and the homotopy type of an associated simplicial complex. In particular, we solve the problem of characterizin...

Journal: :Geomechanics and geophysics for geo-energy and geo-resources 2022

Stress conditions are critical in deep hard rock mining and significantly influence cuttability. The peak cutting force (PCF), work (CW), specific energy (SE) can reflect cuttability determine the feasibility saving of mechanized to some extent. In this paper, uniaxial lateral stress on was investigated by an indentation experiment cuboid using a conical pick, theoretical model proposed analyze...

2012
George S. Kliros

The need of ultrawideband (UWB) antennas with omni-directional coverage is increasing for both military and commercial applications (Wiesbeck et. al., 2009; Minin, 2010). The UWB radio technology promises high resolution radar applications, sensor networks with a large number of sensors for industrial or home surveillance as well as high data-rate communication over short range for personal are...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2013
Yuanlin Zheng Zhuangqi Cao Xianfeng Chen

Novel conical reflection of light by a thick three-layered metal-clad optical waveguide is observed. A symmetrical metal-cladding optical waveguide is used, which exhibits extraordinary conical reflection during free-space coupling of light to the waveguide. The phenomenon is attributed to the leakage of excited ultrahigh-order guided modes and their inter- and intramode coupling interaction.

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