in this paper, we study cyclic surfaces in 5 1 e generated by homothetic motions of a lorentziancircle. the properties of these cyclic surfaces up to first order are investigated. we show that, as it is shown ine5 , cyclic 2-surfaces in 5 1 e , in general, are contained in canal hypersurfaces. finally, we give an example.

carbonate materials are mostly found in tropical areas, where exploiting gas and oil resources are of high concern. their unique behavior under shear loading first was recognised during oil resources investigations in the persian gulf. off-shore structures have been placed on carbonate soils which are highly crushable.during storms cyclic loading imposes on the bases of structures lied down on ...

in this paper, the effect of cyclic loading on punching strength of flat slabs strengthened with carbon fiber reinforced polymer (cfrp) sheets is studied. experimental results of ten slab specimens under monotonic and cyclic loading are analyzed. eight specimens were strengthened with cfrp sheets on the tensile face of the slabs and the two other specimens were kept un-strengthened as control s...

Abstract Y 4 O 2 (CN ) 3 Cl and some isotypic rare earth ( RE carbodiimides = Sm, Gd, Tb) were prepared by solid-state metathesis reaction between , OCl Li CN . The crystal structure of was solved refined from single-crystal XRD data with the monocline space group C2/m Homologous compounds Tb assigned isotypically means powder diffraction. is characterized one-dimensional cluster chains which a...

Abstract New rare earth (RE) carbodiimides having the formula RE 8 O(CN 2 ) 10 Br were synthesized by solid-state metathesis reactions. Structure determinations and refinements, based on single-crystal X-ray diffraction data, are performed with space group P ͞3 c1 . Homologous compounds = La, Ce, Pr, Nd assigned isotypically. The refined crystal structure appears most unusual for carbodiimide co...

of, say, the meaning and significance of first order differential equations or the use of series expansions for the approximation of functions. In general this small book will not be of great technical assistance to the non-mathematical reader. To those whose concept of mathematics begins to falter at the Henderson-Hasselbach equation, it may serve a purpose in showing that mathematics has noth...

12-molybdophosphoric acid (pmo12) was encaged into hmor zeolite by “ship in a bottle”method in aqueous phase which is strongly retained and not easily leached from the host channels.the solid was characterized by xrd prior to using it for the electrode preparation. this compoundwas incorporated with a carbon paste electrode for cyclic voltammetric measurements. pmo12immobilized on the support u...