Aggregation always occurs in industrial processes with fractal-like particles, especially dense systems (the volume fraction, ϕ>1%). However, the classic aggregation theory, established by Smoluchowski 1917, cannot sufficiently simulate particle dynamics systems, particularly those of generat ed particles. In this article, Langevin dynamic was applied to study collision rate aggregations as ...

The scattering of ortho positronium (Ps) by H2 has been investigated using a threePs-state [Ps(1s,2s,2p)H2(X Σg )] coupled-channel model and using Born approximation for higher excitations and ionization of Ps and B Σu and b Σu excitations of H2. We employ a recently proposed time-reversal-symmetric nonlocal electron-exchange model potential. We present a calculational scheme for solving the bo...

Resonance-enhanced multiphoton ionization coupled with time-of-flight product imaging has been used to study the O2(Σg) + O(Pj) product channel in the UV photodissociation of ozone at photolysis wavelengths of 226, 230, 240, and 266 nm. For dissociation at 226 and 230 nm the O(P2) fragment is produced with a strongly bimodal velocity distribution, in keeping with the previous findings of Miller...

We study the bending motion in the tetratomic molecules C2H2 (X̃ (1)Σg (+)), C2H2 (Ã (1)Au) trans-S1, C2H2 (Ã (1)A2) cis-S1, and X̃ (1)A1 H2CO. We show that the algebraic operator expansion method with only linear terms comprised of the basic operators is able to describe the main features of the level energies in these molecules in terms of two (linear) or three (trans-bent, cis-bent, and branch...

Non-adiabatic dynamics of the acetylene cation is investigated using mixed quantum-classical dynamics based on trajectory surface hopping. To describe the non-adiabatic effects, two surface hopping methods are used, namely, Tully's fewest switches and Landau-Zener surface hopping. Similarities and differences between the results based on those two methods are discussed. We find that the photoio...

+ [BRW08, GAI08, TBM01]. 1.9 Å [YKS12]. 10 [AGO07]. 1s [UYT97]. 2 [SRZE04]. 20 [AGO07]. 217 [Gos02a]. 21 [KvH99]. 3 [KMR01, SRZE04]. 3d [MTA00, TSON00]. 5d [SED98]. 5f [MCC03]. = [HOI08, KIT08]. + [ARS99, KM98, SJO05]. − [CCM05, Miy03, SEL01]. 1 [BRW08]. 13 [CPBS05]. Σg [Kom05]. 2 [SP99]. 2+ [SCTH07]. 2− [CSZ99]. 2h [DE05]. 3+ [ADA03]. 4+ [IOA03, TBM01]. n [CPBS05]. n+ [LM03]. n± [NM03]. 0 [MFM...

Topological Strings I am going to tell you about some work I have been doing with Kirill Saraikin and Cumrun Vafa, the first part of which has appeared in [1] and the second part will appear soon [2]. Since this is the first talk in this workshop about topological strings, I would like to start by introducing topological strings and describing some of their properties. For our purposes we will ...

We consider cross-product II1 factors M = N⋊σG, with G discrete ICC groups that contain infinite normal subgroups with the relative property (T) and σ : G → AutN trace preserving actions of G on finite von Neumann algebras N that are “malleable” and mixing. Examples are the weighted Bernoulli and Bogoliubov shifts. We prove a rigidity result, showing the uniqueness of the position of L(G) insid...

A single-effect diffusion still, instead of a multiple-effect (MED) combined with tilted wick (TW) still was investigated experimentally under actual weather conditions to investigate whether the natural convection can transport vapor from TW an MED adequately. It found that be heated by and solar radiation absorbed on still. From experiments in summer autumn, it both seasons absorbs directly o...

We calculate the first homology group of the mapping class group with coefficients in the first rational homology group of the universal abelian Z/LZ-cover of the surface. If the surface has one marked point, then the answer is Qτ(L), where τ(L) is the number of positive divisors of L. If the surface instead has one boundary component, then the answer is Q. We also perform the same calculation ...