To date the usual method for checking variation among populations of somatic cells grown in vitro has been gross microscopic examination . In a previous paper an attempt was made to characterize cell populations in a more quantitative way by measuring cell diameters under the microscope (Simons, 1967) . This kind of characterization can be obtained faster and more exactly when an electronic cou...

The 2-dimensional logarithmic number system (2DLNS), a subset of the multi-DLNS (MDLNS), which has similar properties to the classical Logarithmic Number System (LNS), provides more degrees of freedom than the LNS by virtue of having two orthogonal bases and has the ability to use multiple 2DLNS components, or digits. The second base in 2DLNS can be adjusted to improve the representation space ...

objective: yield components and genetic contribution have the most important in final yield and breeding programs of crop plants. for this purpose, 20 varieties of grapevines with russia origin were evaluated in urmia and takestan research station (under full irrigation and drought stress). methods: twenty grapevine genotypes were evaluated in urmia and takestan research station (under full irr...

The ability of Xenorhabdus nematophilus 19061/1 to be transformed by pHK17 plasmid DNA was studied and optimized. A number of factors, including culture conditions, stage of growth, transformation buffer pH, cation type and concentration required for the production of competency, washing, heat shock conditions, and cell-DNA ratio, were found to affect transformation significantly. On the basis ...

Pattern descriptors invariant to rotation, scaling, and translation represents an important direction in the elaboration of real time object recognition systems. In this article, new kinds based on chord transformation are presented. There described methods image presentation - Central Logarithmic Image Chord Transformations (CICT LCICT). It is shown that CICToperation makes it possible achieve...

The paper investigates whether transforming a time series leads to an improvement in forecasting accuracy. The class of transformations that is considered is the Box-Cox power transformation, which applies to series measured on a ratio scale. We propose a nonparametric approach for estimating the optimal transformation parameter based on the frequency domain estimation of the prediction error v...