The mean-variance (MV) portfolio is typically formulated as a quadratic programming (QP) problem that linearly combines the conflicting objectives of minimizing the risk and maximizing the expected return through a risk aversion profile parameter.In this formulation, the two objectives are expressed in different units, an issue that could definitel

The paper presents the experience of surgical treatment of 58 patients with discogenic lumbosacral radiculitis.The aim of the surgical treatment was to eliminate the compression of the spinal roots of the herniated disc with the subsequent stabilization of the spinal-motor segment with implantable interspinous system COFLEX.Indications for surgical

The effects INTESTINEW of global warming increase the frequency and intensity of many climate events such as rainfall.We evaluated the effects of environmental conditions on early stage seedling survival of the native thorn scrub species Caesalpinia mexicana A.Gray, Celtis pallida Torr., Cordia boissieri A.DC., and Ebenopsis ebano (Berland.) Barneb

Si2N2O is considered as a new great potential structural/functional candidate in place of Si3N4.The amorphous Si3N4 nanopowder was incorporated into silica sol by adding of MgO and Y2O3 as sintering aid.Synthesized powders were heated by spark plasma sintering at a heating rate of 100 oC/min yielded fully dense compacts at 1550 and 1750 curve-novel

Psychoactive substances are often regarded as causal factors contributing to violent injuries, sexual abuse and homicides.While these effects have been demonstrated for some substances (e.g.copyright), current available data for others are more controversial (e.g.cannabis) or very limited (e.g.ecstasy).To collect data on the type and frequency of p