For some physics students, the concept of a particle travelling faster than the speed of light holds endless fascination, and Čerenkov radiation is a visible consequence of a charged particle travelling through a medium at locally superluminal velocities. The Heaviside–Feynman equations for calculating the magnetic and electric fields of a moving charge have been known for many decades, but it ...

This work reports on a surprising and abnormal increase of the Raman intensity when the probing area is moved to the edge of a mechanically cleaved Si wafer. Our detailed surface structure study based on atomic force microscope and scanning electron microscope rules out any effect from surface morphology. Systematic study of the Raman system focusing effect with a range of μm finds no focusing ...

The glomerular basement membrane (GBM) is a crucial component of the kidney's filtration barrier that separates the vasculature from the urinary space. During glomerulogenesis, the GBM is formed from fusion of two distinct basement membranes, one synthesized by the glomerular epithelial cell (podocyte) and the other by the glomerular endothelial cell. The main components of the GBM are laminin-...

It is an open problem whether a separating operator acting between semiprime f-algebras weighted composition operator. In this respect, we have been largely motivated by the recent paper (Abid et al. in Positivity 21:521–537, 2017) which give positive answer when f-algebra domain unital. general case, prove that if and only almost contractive. As consequence, generalizes improve some well-known...

The impact flux over the last 3 Ga in inner Solar System is commonly assumed to be constant through time. However, asteroid break-up events main belt may have been responsible for cratering spikes ~2 on Earth-Moon system. We investigate here possible variations of size frequency distributions impactors from record small craters 521 martian larger than 20 km diameter. show that 49 (out 521) corr...

To explore the association between DRD4 polymorphisms and schizophrenia risk, a meta-analysis was carried out with 41 case-control articles. Specifically, we included 28 articles (5,735 cases and 5,278 controls) that pertained to the 48 bp variable number tandem repeat (VNTR) polymorphism, nine articles (1,517 cases and 1,746 controls) that corresponded to the 12 bp tandem repeat (TR), six arti...

521 patients suffering from frequent urinary tract infections were included in this study. Patients were treated for 3 months with one capsule daily of Uro-Vaxom, together with any eventual antibiotic or chemotherapeutic, and observed for further 3 months. During this 6-month trial the number of recurrences was significantly reduced in comparison with the 6month pretrial period ( P < 0.001). Th...