Two measures are commonly used to describe scale-invariant complexity in images: fractal dimension (D) and power spectrum decay rate (β). Although a relationship between these measures has been derived mathematically, empirical validation across measurements is lacking. Here, we determine the relationship between D and β for 1and 2-dimensional fractals. We find that for 1-dimensional fractals, ...

The multivariable feedback system tracking error is related to the sensitivity matrix S = [I + L]–1and to the uncertainty of plant and instrumentation. The ‘popular' highly interacting 2×2 distillation column problem is solved in a novel manner.

Aripiprazole has been used effectively to treat schizophrenia in the clinic ; however, its mechanisms of action are not clear. This study examined how shortand long-term aripiprazole treatment affects dopaminergic transmission in mesolimbic and nigrostriatal pathways. For comparison, the effects of haloperidol and olanzapine treatment were also examined. Aripiprazole significantly increased D2 ...

A novel, simple and economic reverse phase high performance liquid chromatography (RP-HPLC) Stability indicating method has been developed for the estimation of zolpidem tartrate in bulk and tablet dosage form with greater precision and accuracy. Separation was achieved on C18 column (250X4.6mm i.d.,5μm) in isocratic mode using methanol and acetonitrile in the ratio 50:50 (v/v) as mobile phase,...

Conversion of 1and 2-tetralone was investigated over acid HY zeolite under various reaction conditions in the vapor phase. Reactions were conducted in a fixed-bed reactor at 300, 400 and 500 C in hydrogen atmospheric pressure. It was found that 1and 2-tetralone are thermally unstable and thermal reaction has a contribution, particularly at high temperatures. The reactivity of 2-tetralone was si...