Point-Particle Catalysis
نویسندگان
چکیده
منابع مشابه
Point - source inertial particle dispersion
The dispersion of inertial particles continuously emitted from a point source is analytically investigated in the limit of small inertia. Our focus is on the evolution equation of the particle joint probability density function p(x,v, t), x and v being the particle position and velocity, respectively. For finite inertia, position and velocity variables are coupled, with the result that p(x,v, t...
متن کاملParticle physics catalysis of thermal big bang nucleosynthesis.
We point out that the existence of metastable, tau>10(3) s, negatively charged electroweak-scale particles (X-) alters the predictions for lithium and other primordial elemental abundances for A>4 via the formation of bound states with nuclei during big bang nucleosynthesis. In particular, we show that the bound states of X- with helium, formed at temperatures of about T=10(8) K, lead to the ca...
متن کاملAsymmetric Catalysis with a Mechanically Point-Chiral Rotaxane
Mechanical point-chirality in a [2]rotaxane is utilized for asymmetric catalysis. Stable enantiomers of the rotaxane result from a bulky group in the middle of the thread preventing a benzylic amide macrocycle shuttling between different sides of a prochiral center, creating point chirality in the vicinity of a secondary amine group. The resulting mechanochirogenesis delivers enantioselective o...
متن کاملParticle swarm optimization for point pattern matching
The technique for point pattern matching (PPM) is essential to many image analysis and computer vision tasks. Given two point patterns, the PPM technique finds an optimal transformation for one point pattern such that a distance measure from the transformed point pattern to the other is minimized. This paper presents a new PPM algorithm based on particle swarm optimization (PSO). The set of tra...
متن کاملProper Dynamics of a Rigid Point Particle
A spinor formulation of the classical Lorentz force is given which describes the presession of an electron’s spin as well as its velocity. Solutions are worked out applicable to an electron in a
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Frontiers in Physics
سال: 2019
ISSN: 2296-424X
DOI: 10.3389/fphy.2019.00167