Matter is what we call all of the “stuff” that makes up the universe. Ordinary matter, such as atoms, makes up only about 15% of all the matter in the universe. The other 85% is called “dark matter”—it is invisible but important enough to hold our galaxy, the Milky Way, together so it does not break apart. What is dark matter? For decades, astronomers have been thinking of ideas and trying to t...

We develop a detailed model of the Milky Way (a “prototypical” disk galaxy) and extend it to other disks with the help of some simple scaling relations, obtained in the framework of Cold Dark Matter models. This phenomenological (“hybrid”) approach to the study of disk galaxy evolution allows us to reproduce successfully a large number of observed properties of disk galaxies in the local Univer...

The general equations describing hydrostatic equilibrium are developed for Non-singular Gravity. A new type of astrophysical structure, a Super Dense Object (SDO) or “Dark Star”, is shown to exist beyond Neutron star field strengths. These structures are intrinsically stable against gravitational collapse and represent the non-singular alternative to General Relativity’s Black Holes. Typeset us...

casimir forces of massive ferrnionic dirac fields are calculated for parallel plates geometry in spatial space with dimension d and imposing bag model boundary conditions. it is shown that in the range of ma>>l where m is mass of fields quanta and a is the separation distance of the plates, it is equal to massive bosonic fields casimir force for each degree of freedom. we argue this equality ex...

Casimir forces of massive ferrnionic Dirac fields are calculated for parallel plates geometry in spatial space with dimension d and imposing bag model boundary conditions. It is shown that in the range of ma>>l where m is mass of fields quanta and a is the separation distance of the plates, it is equal to massive bosonic fields Casimir force for each degree of freedom. We argue this equalit...

on the verge of the constitutionalist revolution in iran, the three social forces existing in the socio-political arena were competing with each other and at the same time, struggling with the monarchy to increase their share of power: independent intellectuals, traditional followers of religion, and merchants. this rivalry set the scene for a discursive battle in which, each social force was t...

objective : the aim of this study was to evaluate fracture characteristics of rigid two-tooth segments splinted with fiber reinforced composite (frc), with and without application of simulated masticatory forces. material and methods: in this experimental study, 80 extracted maxillary bicuspids were joined in pairs from the buccal aspect using frc. the specimens were divided into two groups. in...

Conspiracy theories can form a monological belief system: A self-sustaining worldview comprised of a network of mutually supportive beliefs. The present research shows that even mutually incompatible conspiracy theories are positively correlated in endorsement. In Study 1 (n 1⁄4 137), the more participants believed that Princess Diana faked her own death, the more they believed that she was mur...

We investigate the welfare implications of operating alternative market structures known as electronic crossing networks or “dark pools” alongside traditional “lit” markets. We study equilibria of a market where intrinsic traders and speculators, endowed with heterogeneous fine-grained information, endogenously choose between dark and lit venues. We establish that while the dark pool attracts r...