for the first time, a multi-residue methodfor simultaneous determination of 41lc-amenable pesticides in rice, belonging to different chemical classes has been developed in iran by lc-ms/ms. the pesticides were analyzed simultaneously in a single run using positive electrospray ionization with multiple reaction monitoring (mrm) after extraction with slightly modified quechers method. the calibra...

After a brief introduction to hash-coding (scatter storage) and discussion of methods described in the literature, it is shown that for hash tables of length p >2, prime, the primitive roots r of the cyclic group Z/p of prime residues mod p can be used for a simple collision strategy q(p,i) = r mod p for fi(k) = f0(k) +q(p,i) mod p. It is similar to the strategy which uses quadratic residues q(...

introduction integrated nutrient management involving crop residue/green manures and chemical fertilizer is potential alternative to provide a balanced supply of nutrients, enhance soil quality and thereby sustain higher productivity. the present experiment was undertaken to evaluate the effect of different crop residue management practices and npk levels on yield components and yield of wheat....

local information about tillage intensity and ground residue coverage is useful for policies in agricultural extension, tillage implement design and upgrading management methods. the current methods for assessing crop residue coverage and tillage intensity such as residue weighing methods, line-transect and photo comparison methods are tedious and time-consuming. the present study was devoted t...

introduction various factors like climatic conditions, vegetation, soil properties, topography, time, plant residue quality and crop management strategies affect the decomposition rate of organic carbon (oc) and its residence time in soil. plant residue management concerns nutrients recycling, carbon recycling in ecosystems and the increasing co2 concentration in the atmosphere. plant residue d...

We find that the minimum distance of the binary [137; 69] quadratic residue code is 21.

Logical candidates for residue number system (RNS) implementations are applications which require very high data rates and are numerically intensive. The quadratic residue number system (QRNS) is specifically designed for fast complex arithmetic. In a previous paper by Dubois and Venetsanopoulos the use of Eisenstein complex numbers was proposed for the implementation of a radix-3 fast Fourier ...