Guglielmo Marconi probably made the first spread spectrum transmission without even realizing it. His primitive spark-gap transmitter used an RF bandwidth that was much wider than the information bandwidth. Little did he know that his experiment would spark a revolution in communications technology. Today, wireless communications plays an integral part in our daily lives. Cellular phones are qu...

Although previous works have discussed the benefits of precolonial centralization for development in Africa, the findings and the mechanisms provided do not explain the heterogeneity in development outcomes of formerly centralized states. Using new survey data from Nigeria, I find a significant negative effect of precolonial centralization on access to certain public services for centralized re...

Tuberculosis (TB) is still responsible for 2 million deaths every year despite being a treatable airborne infectious disease. "Consumption" and "Phthisis" were terms historically used to describe TB, which was responsible for one in four deaths in the 19th century. Due to its infectious nature, chronic progression and long treatment, TB is a great burden for society. Moreover the emergence of m...

Cancers are a leading cause of death today as they will be in the future. Chemotherapy is one of the major weapons we have in the ill equipped battle against this important human threat. Despite several drawbacks, nanoparticle based drug delivery systems (DDS) hold promise to ameliorate anticancer chemotherapy. From the beginning of “Nano medicine” by the discovery of liposomes by Bangham et al...

Till today we dreamt of imperceptible delay in a network. The computer science research grows today faster than ever offering more and more services (computational representational, graphical, intelligent implication etc) to its user. But the problem lies in “greater the volume of services greater the problem of delay”. So tracing delay, or performance analysis focusing on time required for com...

Two photon decay widths of the J = O scalar mesons a0(980), f0(980), f0(1370) and χc0 are calculated in a covariant model which is characterized by the quark antiquark structure. Previously such models were used to calculate current form factors. Here a different application is tried. A simple version of the model uses adjusted nonrelativistic model parameters with small quark masses. The resul...

The isosinglet scalar mesons f0(1710), f0(1500), f0(1370) and their mixing are studied. Two recent lattice results are employed as the starting point; one is the approximate SU(3) symmetry in the scalar sector above 1 GeV for the connected insertion part without qq̄ annihilation, and the other is the scalar glueball mass at 1710 MeV in the quenched approximation. In the SU(3) symmetry limit, f0(...