Abstract We present and discuss two exact, but perhaps unfamiliar, representations of thermal radiation. The first has the form a superposition quantum vacuum stochastic classical field second is pure-state thermofield representation introduced by Takahashi Umezawa. It interesting that former is, essentially, opposite Planck’s original conception blackbody

Membrane separation is known as an efficient technique for the oily wastewater treatment. Therefore, in the present study, sulfonated poly (ether ether ketone) (SPEEK) was introduced into the polysulfone (PSF) solution in order to enhance the hydrophilicity and the membrane structure for the oil–water separation. The hollow fiber membranes were fabricated via a phase-inversion process. The memb...

The in vitro activity of rac-mefloquine hydrochloride and its pure enantiomers was tested against a chloroquine-resistant (PF.IBS2) strain of Plasmodium falciparum. The parasite isolated from Iranian patients was cultured in vitro by the candle jar method described by Tranger and Jensen and was exposed to the racemic mefloquine or its enantiomers over the concentration range of 10-9 to 10-4 M. ...

For a given set M of positive integers, a well-known problem of Motzkin asks for determining the maximal density μ(M) among sets of nonnegative integers in which no two elements differ by M . The problem is completely settled when |M | ≤ 2, and some partial results are known for several families of M for |M | ≥ 3. In this paper, we consider the case M = {a, b, c}, with c a multiple of a or b. I...

fateme derakhshan-panah was born in hamedan (iran) in 1987. she received her b.s. in pure chemistry (2009) and m.s. in organic chemistry (2011) from bu-ali sina university, iran. she is currently working towards her ph.d. under the supervision of professor m. a. zolfigol. her research interest is organic methodology especially the application of solid acids and ionic liquids in organic synthesis.

In many geographical applications there is a need to model spatial phenomena not simply by sharp objects but rather through indeterminate or vague concepts. To support such applications we present a model of vague regions which covers and extends previous approaches. The formal framework is based on a general exact model of spatial data types. On the one hand, this simplifies the definition of ...

In this paper we proved that every g-Riesz basis for Hilbert space $H$ with respect to $K$ by adding a condition is a Riesz basis for Hilbert $B(K)$-module $B(H,K)$. This is an extension of [A. Askarizadeh, M. A. Dehghan, {em G-frames as special frames}, Turk. J. Math., 35, (2011) 1-11]. Also, we derived similar results for g-orthonormal and orthogonal bases. Some relationships between dual fra...

in this paper we proved that every g-riesz basis for hilbert space $h$ with respect to $k$ by adding a condition is a riesz basis for hilbert $b(k)$-module $b(h,k)$. this is an extension of [a. askarizadeh,m. a. dehghan, {em g-frames as special frames}, turk. j. math., 35, (2011) 1-11]. also, we derived similar results for g-orthonormal and orthogonal bases. some relationships between dual fram...