The purpose of this note is to propose an improvement to the widely-used Steinberg-Lund model for rate-dependent plasticity. The improved model is rate-dependent above, as well as below, the Peierls stress. As a result of this change, one material constant in the Steinberg-Lund model acquires a new value, and we thereby obtain a revised estimate for the dislocation density in tantalum. 1. Intro...

We show that, for the purpose of pricing Swaptions, the Swap rate and the corresponding Forward rates can be considered lognormal under a single martingale measure. Swaptions can then be priced as options on a basket of lognormal assets and an approximation formula is derived for such options. This formula is centered around a Black-Scholes price with an appropriate volatility, plus a correctio...

With circulation assumed to imply use and thus need, multiple regression analysis was employed to determine which variables best correlate with circulation. Three were identified: number of books added; full-time equivalent size of student body; and undergraduate and graduate courses offered. A "T'' test showed no significant difference between the means of per student circulation differentiate...

Preliminary notes A research was conducted, for the paper, in two countries in the South-Eastern Europe region, at multiple pedestrian crossing locations in order to determine the value of motorist yield rate (MYR). The data gathered at 32 locations were used to define a mathematical model for MYR depending on location characteristics and vehicular and pedestrian traffic flow characteristics. U...

Audio-rate modulation of the parameters of physical models is investigated. For example, the resonance frequency of a simple resonator can be modulated smoothly at an audio rate to produce a brighter tone. As with traditional frequency modulation (FM) signal models, complex spectra can be produced through variation of the resonator’s frequency. It is possible to create such hybrid physical/sign...

Scalable video coding (SVC) has become more and more important with the enrichment of multimedia data and the diversification of network and terminal devices. In current MPEG SVC activities, a scalable extension of H.264/AVC, called scalable video model (SVM), is proposed by HHI and has shown further coding efficiency improvement and scalability functionality. However, the SVM model doesn’t pro...

A new simple analytical model for prediction of cooling rate in the solidification process based on the local heat flux density extracted during solidification is introduced. In the modeling procedure, a solidifying control volume is considered in the mushy zone in which a heat balance equation is used to derive the present model. As the local heat flux density is a measurable parameter, the pr...

the exchange rate unification is one of the most important instruments of economic adjustment, which is used in many countries. this paper shows the effects of the exchange rate unification on price level (inflation), gross domestic production (gdp), non-oil exports, private conception, government expenditure and stock of money. the data, is used related to the period 1959-2000. to analyze the ...