BACKGROUND: Psychiatric magnetic resonance spectroscopy (MRS) is based on the assumption that controls are sufficiently homogeneous that they can be pooled, and compared as a uniform group to a disordered second group. This assumption is central to the assessment of disorders of inhibition such as depression or obsessive-compulsive disorder, using MRS-obtained estimates of the highly coupled Gl...

Raman spectroscopy was used to measure the frequencies of phonons in Si24 with an open clathrate structure at temperatures from 80 to 400 K with simultaneous pressures of 0 to 8 GPa. The frequency shifts of the different phonons were substantially different under either temperature or pressure. The quasiharmonic behavior was isolated by varying pressure at low temperatures, and the anharmonic b...

We discuss the problem of embedding planar graphs onto the plane with pre-specified vertex locations. In particular, we introduce a method for constructing such an embedding for both the case where the mapping from the vertices onto the vertex locations is fixed and the case where this mapping can be chosen. Moreover, the technique we present is sufficiently abstract to generalize to a method f...

nearly three decades ago, the master of public health (mph) academic degree was introduced to tehran university of medical sciences' school of public health, tehran, iran. a new program for simultaneous education of medical, pharmaceutical and dental students was initiated in 2006. talented students had the opportunity to study mph simultaneously. there were some concerns about this kind of adm...

Background: For every pregnant woman, it is possible to have a child with chromosomal abnormalities. Although this possibility is not very high, by performing screening tests and considering the mother's background factors, we can largely realize the real extent of this possibility. Many comorbidities (like high blood pressure, diabetes, and obesity) and high-risk exposures (like alcohol consu...