the molecular geometry of complex of adenine with 8 water molecules was calculated with hartree-fock (hf). the standard 6-31g(d) basis set has been employed. the existence of c-h…o hydrogen bonds between the water molecules and the hydrophobic part of nucleobase is stablished. we optimized structures and computed interaction energies of all complexes of adenine with water molecules step by step...

a watershed management program is usually based on the results of watershed modeling. accurate modeling results are decided by the appropriate parameters and input data. precipitation is the most important input for watershed modeling. precipitation characteristics usually exhibit significant spatial variation, even within small watersheds. therefore, properly describing the spatial variation o...

COVID-19’s global spread had numerous negative consequences for the industry. At present, many antivirus products and technologies have been proposed, among which ultraviolet has proven effective does not pollute environment. Most disinfection devices use fixed-point methods disinfection, is very labor-intensive inflexible. Mobile robots are often optimized because movement trajectory of robot ...

One of the major obstacles to the micropropagation of Prunus rootstocks has, up until now, been the lack of a suitable tissue culture medium. Therefore, reformulation of culture media or modification of the mineral content might be a breakthrough to improve in vitro multiplication of G × N15 (garnem). We found artificial neural network in combination of genetic algorithm (ANN-GA) as a very prec...

This study aimed to analyze the outcomes of stress intensity factor (KI) and new bond strength tests oil well cement (class H) with a water-to-cement ratio (w/c) 0.38. Mechanical properties paste, such as compressive flexural strengths, were tested qualified at 1, 7, 28 days curing. The relationship between elastic modulus axial strain using differential Vipulanandan p-q model for paste was obt...

This paper presents a proof of Stirling's formula using Haar wavelets and some properties of Hilbert space, such as Parseval's identity. The present paper shows a connection between Haar wavelets and certain sequences.