In this paper, we consider a discrete-time queue of Geo/Geo/c type with geometric repeated attempts. It is known that its continuous counterpart, namely the M/M/c queue with exponential retrials, is analytically intractable due to the spatial heterogeneity of the underlying Markov chain, caused from the retrial feature. In discrete-time, the occurrence of multiple events at each slot increases ...

Alfred Marshall (1842-1924) was one of the earliest professional economists at the University of Cambridge in the nineteenth century, and a founder of the Cambridge School of economics which nurtured leading economists such as A. C. Pigou and J. M. Keynes. However, in his early research, before becoming a professional economist, Marshall explored what psychology had to say about the human facul...

Accumulating evidence suggests that RA is a T-cell-mediated autoimmune disease. Early attempts at disease modulation using strategies such as CD4 mAbs were severely hampered by a lack of biomarkers of autoreactivity. Recently, however, co-stimulation blockade has emerged as an effective treatment for RA. Alongside a greatly improved mechanistic understanding of immune regulation, this has rekin...

Geo-features play a key role in object-oriented or feature-based geo-processing system. So the strategy for how-tomanage and how-to-model the geo-features builds the main architecture of the entire system and also supports the efficiency and functionality of the system. Unlike the conventional 2D geo-processing system, geo-features in 3D GIS have lots to be considered to model regarding the eff...

The role of mathematics in economic analysis is not yet a settled question. Smith, Ricardo, Mill and other eminent classical economists did not use mathematics in their economic theorizations. We have defined classical mathematical economics as the whole body of literature in mathematical treatment of economics originating mainly from the contributions of Cournot,  Jevons and Walras. There are ...

Between 2001 and 2009, the area of Naples, South Italy, repeatedly hit the headlines of national and international media due to the waste management crisis that on many occasions filled up the streets of the region with huge piles of waste. What soon emerged as the main bone of contention concerned the connections between the population's health and the presence of dumps on the territory. What ...

Cyrille Boyer, May Lim, and co-workers highlight recent advances in upconversion nanoparticles (UCNPs) as NIR-initiated controlled drug delivery systems. Surface modification strategies are reviewed alongside with the influence of the laser power intensity and illumination time on the drug release pattern in article 1500437. NIRto-UV/visible UCNPs have emerged as potential remotecontrolled nano...