The electrical isolation of Zn-doped GaAs layers grown by metalorganic chemical vapor deposition was studied using H, Li, C, and O ion implantation. The ion mass did not play a significant role in the stability of isolation, and a similar activation energy of ;(0.6360.03 eV) was obtained for isolation using either H or O ions. Furthermore, the isolation was stable against isochronal annealing u...

in present study, molecular dynamics simulation of cadmium (ii), lead (ii) and copper (ii) removal from aqueous electrolyte solutions using the ion-exchange process with the zeolite particles was done. the results showed that, most of the particles had the highest affinity of ion exchanging with lead (ii) and the lowest affinity with copper (ii). the calculated mean ion-exchange ratios showed t...

One class of theore t ica l accounts of associative l ea rn ing suggests tha t re in forcers are p rocessed accord ing to l ea rn ing rules tha t min imize the predic t ive e r r o r be tween the expec ted s t r eng th of future r e i n fo r cemen t and its actual s t rength . The omis s ion of r e i n f o r c e m e n t in a s i tua t ion w h e r e it is expec ted leads to i nh ib i to ry l ea ...

‎suppose $n$ is a fixed positive integer‎. ‎we introduce the relative n-th non-commuting graph $gamma^{n} _{h,g}$‎, ‎associated to the non-abelian subgroup $h$ of group $g$‎. ‎the vertex set is $gsetminus c^n_{h,g}$ in which $c^n_{h,g} = {xin g‎ : ‎[x,y^{n}]=1 mbox{~and~} [x^{n},y]=1mbox{~for~all~} yin h}$‎. ‎moreover‎, ‎${x,y}$ is an edge if $x$ or $y$ belong to $h$ and $xy^{n}eq y^{n}x$ or $x...

Acqui r ing diver se sensor y infor mat ion fr om any machiner y, such tha t da ta fr om di ffer ent sensor s i s synchr oni sed wi th each other as wel l as wi th the ins tant angular pos i t ion of the machiner y i s a t ask fr aught wi th sever a l l ayer s of compl ica t ion. Thi s paper d i scusses the da ta acqui s i t ion se t up for a h igh speed diese l engine . Cyl inder pr essur es ,...

In this article, preparation of polypyrrole and its nanocomposites as adsorbents werediscussed and the capability of separation of copper ions from aqueous solution were studied.Polypyrrole was prepared by chemical oxidative polymerization method of pyrrole usingFeCl3 as an oxidant. The removal of Cu (II) was investigated using PPy, PPy/TiO2 andPPy/TiO2/DHSNa nanocomposites. The products were i...

In this study, Response Surface Methodology (RSM) using Central Composite Design (CCD) was employed to optimize the conditions of independent variables (adsorption time and ion solution concentration) for the removal of Zinc (II) and Ag ions from the aqueous solutions using analcime and modified analcime zeolites (Fe-ANA and Ni-ANA) as efficient and low cost adsor...

76 Vegetated buff ers are a well-studied and widely used agricultural management practice for reducing nonpointsource pollution. A wealth of literature provides experimental data on their mitigation effi cacy. Th is paper aggregated many of these results and performed a meta-analysis to quantify the relationships between pollutant removal effi cacy and buff er width, buff er slope, soil type, a...

Video o n demand (VOD) sys t ems are becoming popular. T h e y have special requirements for receiving VOD data steadily, but c o m m o n general communicat ion protocols canno t m e e t the ir requirements. Several n e w protocols have been designed t o fulfill th i s service requirem e n t , bu t it takes a long t i m e f o r a protocol t o be supported f r o m end t o end . W e propose a VOD...