An analysis of silver candlesticks from a casting point of view： originals, copies, forgeries

Collecting silver artefacts has traditionally been a very popular hobby.Silver is addictive,therefore the number of potential collectors and investors appears to grow each year.Unfortunately,increases in the interest and buying potentials resulted in a number of forgeries manufactured and introduced to the open antique market.The items such as early silver candlesticks dictate a very high price,for many high quality fakes show very good appearances and matching similarities with originals.Such copies are tr...     

Sex therapy for the spinal cord injured client: Suggestions for professionals.

Reviews the literature that discusses the treatment of sexual problems experienced by spinal-cord-injured (SCI) persons. The effects of SCIs on sexual response and performance are described. Sex therapy interventions including support, education, behavioral and couple modifications, and intrapsychic changes are outlined. Suggestions for helping SCI clients express their sexuality are offered. (31 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

UTRA/FDD RF Transceiver Requirements

Unified RF requirements are derived for an UMTS Terrestrial RadioAccess/Frequency Division Duplex (UTRA/FDD) compliant mobile transceiver. Aset of transceiver requirements are proposed with consideration to systemissues including duplex aspects. From these design-compatible requirements areproposed for each functional block in the transceiver.     

An isoparametric Hermitian element for the solution of field problems

A two-dimensional isoparametric Hermitian element is investigated for use in potential field problems with irregular geometry. Nodal degrees-of-freedom are the potential, the gradients in the directions normal and tangential to the element sides, and the twist. In applying the isoparametric principle a simple approximation is used which in general guarantees C¹ continuity only at the element corners. The present version is restricted to 90-degree interior angles. The element is applied in the Galerkin solution of the steady-state continuity equation and several examples are presented. It is found that in cases where the potential field is simple but the element is strongly distorted, gradients obtained from the Hermite are not as accurate as those from the Lagrange-type cubic element having the same number of degrees-of-freedom. When the potential field is complex and the distortion is small, the Hermitian gradients are comparable to those of the Lagrange cubic; with increasing distortion they are comparable at the boundaries but less so in the interior. The errors in the potentials themselves are very similar, both elements giving a high degree of accuracy. Since all of its degrees-of-freedom are shared by four elements in the interior of a grid, the Hermite element is approximately 20 per cent more efficient than the Lagrange cubic for all but the smallest grids. Also, since the Hermite uses fewer nodes, data handling is greatly reduced. The element appears to be attractive at least in the area of groundwater flow.     

Studium der alkalischen hydrolyse der ester-bindungen in einem acrylsäureethylester-acrylnitril-divinylbenzol-perlcopolymeren

In consideration of results of a preceding paper the mathematical evaluation of conversion curves obtained by alkaline hydrolysis of ester bonds of ethyl acrylateacrylonitrile-divinylbenzene bead copolymers was carried out. The influence of individual factors (reaction temperature, molecular ratio between the hydrolytic agent and the macromolecular substance, the size of copolymer particles, and the density of its network) was determined by means of reaction constants and diffusion coefficients.     

高氯酸杂环配合物金属盐的激光起爆（英）

1 IntroductionNowadays the electrical way of blast-caps initiation istraditional. But the devices used for this process are in-herently susceptible to an accident initiation by externalstimuli such as an electrostatic discharge (ESD), elec-tromagnetic interference (EMI), and radio wave irradia-tion (RI). Pulse laser initiation of explosives is a newperspective method. Pulse lasers provide practical meansof electrical isolation of the energetic materials, therebyeliminating hazards associat…     

Einflu? des Pectins auf die elektrokinetischen Eigenschaften von Pulpesuspensionen aus ?pfeln

Apple pulp suspensions to which different kinds of pectin in concentration up to 500 g.m^–3 was added were studied electrophoretically. It was shown that the natural pectin exerts an essential influence upon the adsorption ability of the pectin added, and upon the electrokinetic potential of the tissue particles respectively.

     

Landsat digital enhancements for change detection in urban environments

Comparison of Landsat digital classifications from two dates has met with limited success for change detection in urban environments. The capabilities of digital enhancements for displaying change were therefore investigated as an alternative procedure for this task. Three different color enhancements, an overlay of band 5, ratios of bands 5 and 7, and a vegetation index, were generated using 1974 and 1978 Landsat data of Hamilton, Ontario. The ratios only emphasize major changes. The band 5 overlay shows change most clearly, but the vegetation index enhancement is almost as good and in addition to showing change also emphasizes the urban boundary and the major road network. It is suggested that change enhancements could be used effectively by agencies responsible for monitoring urban development over large areas.     

Determination of fexofenadine in tablets by capillary electrophoresis in free solution and in solution with cyclodextrins as analyte carriers

Capillary electrophoresis (CE) methods for the determination of fexofenadine (FEX) in commercial pharmaceuticals were developed. It was demonstrated that FEX could be effectively analyzed in free solution cationic CE at low pH. Another analytical approach studied was based on cyclodextrin (CD) modified CE where highly charged CD derivatives served as analyte carriers. In this way, the separation range was spread to physiological pH region and a CE analysis of FEX, present actually in its zwitterionic form, could be accomplished. Several parameters affecting the separations were studied, including the type and concentration of carrier ion, counterion, analyte carrier, and pH of the buffer. The methods based on the free solution CE and CD-modified CE were compared each other, validated, and applied for the determination of FEX in tablets.