Some Aspects of Laboratory Permeability Test

Some Aspects of Laboratory Testing of Two-Stage Reciprocating Compressors

The dynamic testing of a two stage reciprocating air compressor with interand after-cooling during the steady and transient state operation is reported and the encountered problems discussed. Measurements and recordings of the instantaneous temperature and pressure in cylinders, suction and discharge chambers and in the associated pipework and air-coolers were carried out together with the inst...

Some Dynamical Aspects of a Test Theory of Special Relativity

Kinemat ica l ly viable space-t ime theories a d m i t t i n g a ve loc i ty-dependent d i la ta t ion fac tor in addi t ion to t h e Loren tz t r ans fo rma t ion between the inertial sys tems a re considered. I t is shown t h a t these theories a re very unsa t i s fac tory , in the sense of leading nei ther to a un ique defini t ion of t ime nor to a unique fo rmula t ion of a dynamics . As ...

Some combinatorial aspects of finite Hamiltonian groups

In this paper we provide explicit formulas for the number of elements/subgroups/cyclic subgroups of a given order and for the total number of subgroups/cyclic subgroups in a finite Hamiltonian group. The coverings with three proper subgroups and the principal series of such a group are also counted. Finally, we give a complete description of the lattice of characteristic subgroups of a finite H...

Some aspects of cosheaves on diffeological spaces

We define a notion of cosheaves on diffeological spaces by cosheaves on the site of plots. This provides a framework to describe diffeological objects such as internal tangent bundles, the Poincar'{e} groupoids, and furthermore, homology theories such as cubic homology in diffeology by the language of cosheaves. We show that every cosheaf on a diffeological space induces a cosheaf in terms of t...

Investigation of Test Methods , Pavements , and Laboratory Design Related to Asphalt Permeability