N-body simulations of major spiral-spiral mergers with different mass ratios q = M1 : M2 ≤ 4 : 1 are presented. All mergers lead to spheroidal stellar systems with r1/4-like surface density profiles, resembling elliptical galaxies. The internal dynamical structure of the remnants does however depend critically on the adopted mass ratio. Equal-mass mergers with q ≤ 2 : 1 form radially anisotropi...

An analysis is presented of a numerical investigation of the dynamics and geometry of accretion discs in binary systems with mass ratios q = M2/M1 < 0.1, applicable to ultra-compact X-ray binaries, AM CVn stars and very short period cataclysmic variables. The steady-state geometry of the disc in the binary reference frame is found to be quite different from that expected at higher mass ratios. ...

Bellare and Micciancio proposed compressing m1, m2, . . . to f1(m1) ⊕ f2(m2) ⊕ . . .. Collisions are easy to find for long messages but are much more difficult to find for short messages. Exactly how secure is the 4-xor compression function (m1, m2, m3, m4) 7→ f1(m1) ⊕ f2(m2) ⊕ f3(m3) ⊕ f4(m4), with an output size of 4b bits? This paper analyzes, under constraints on machine cost and computatio...

The morphologic relationship of the crown structures of the maxillary second deciduous molar (m2) and the first permanent molar (M1) was investigated with odontometric methods. Materials used were 124 male dental casts taken from Chinese living in Kaohsiung (Taiwan). The mesiodistal and buccolingual diameters, cusp sizes, and intercusp distances were measured. The mean crown diameters were larg...

Results of the survey mollusks in rocky tidal zones at 22 sites along Phu Quoc island April 2019 has identified 42 taxa Mollusks, belonging to 3 classes: Gastropoda (25 taxa), Bivalvia (16 taxa) and Polyplacophora (1 taxon). Species composition between stations varies from 2 9 species. The average density was 21.07 individuals/m2, ranging 3.67 individuals/m2 Southeastern Kim Qui 84.22 Hon Dam N...

We use a set of high-resolution N-body simulations of binary galaxy mergers to show that the morphologies of the tidal features that are seen around a large fraction of nearby, massive ellipticals in the field, cannot be reproduced by equalmass dissipationless mergers; rather, they are well explained by the accretion of disk-dominated galaxies. In particular, the armand loop-like morphologies o...