We employ UV and optical photometry, from the GALEX and SDSS surveys respectively, to study the star formation histories (SFHs) of 561 luminous infrared galaxies (LIR > 10 11L⊙) in the nearby (z < 0.2) Universe. Visual inspection of a subsample of galaxies with r < 16.8 and z < 0.1 (for which eyeball classification of galaxy morphologies is reliable) indicates that a small fraction (∼ 4%) have ...

The time dependent tidal interaction of the Local Group Dwarf Spheroidal (dS) Galaxies with the Milky Way (MW) can fundamentally affect their dynamical properties. The model developed here extends earlier numerical descriptions of dS-MW tidal interactions. We explore the dynamical evolution of dS systems in circular or elliptical MW orbits in the framework of a parametric oscillator. An analyti...

Spheroidal graphite cast iron is a material with wide range of uses such as in automobile parts. By applying active screen plasma nitriding (ASPN) treatment, the use spheroidal expanded, and it can be expected to used under special load conditions. In this study, we evaluated effect ASPN treatment on mechanical properties iron. With nitride layer was formed sample surface diffusion further insi...

Abstract There is little information on pollen morphological analysis of papaya cultivars with different flesh color and origins. We observed characters 17 through scanning electron microscopy. The results showed that grains were monads, tricolporate, small medium-sized. oblate-spheroidal to spheroidal. Foveolate, reticulate, fossulate exine ornamentation observed. Colpi width had maximum coeff...

In this paper, we discuss the progress in the numerical simulation of the socalled ‘whispering gallery’ modes (WGMs) occurring inside a prolate spheroidal cavity. These modes are mainly concentrated in a narrow domain along the equatorial line of a spheroid and they are famous because of their extremely high quality factor. The scalar Helmholtz equation provides a sufficient accuracy for WGM si...

Formation of alpha-synuclein aggregates is proposed to be a crucial event in the pathogenesis of Parkinson's disease. Large soluble oligomeric species are observed as probable intermediates during fibril formation and these, or related aggregates, may constitute the toxic element that triggers neurodegeneration. Unfortunately, there is a paucity of information regarding the structure and compos...