Search

Given set of samples grammatical inference aims at finding underlying automaton or equivalent grammar of theunknown language. Traditional approaches to this problem have made use of both positive and negative samples and the least time complexity that has been reported is O(n3). In this paper, O(n4) algorithm is presented that finds the equivalentregular grammar and subsequently the minimal DFA for a specific set of regular languages which uses only a finite set of positive samples of the unknown language. We presented our proposed algorithm with an example. And time complexity computation is derived. [ABSTRACT FROM AUTHOR]

Grammatical inference aims at finding the minimal DFA corresponding to a given set of samples. Traditional approaches to this problem have made use of both positive and negative samples and the least time complexity that has been reported is O(n3). In this paper, we present a O(n) algorithm that finds the minimal DFA, for a specific set of regular languages which use only a finite set of positive samples of the unknown target language. [ABSTRACT FROM AUTHOR]

A virtual classroom is an online learning environment in which students and teachers collaborate using technological equipment provided by software. A virtual classroom transmits real-time teachings while also providing the same collaboration tools and level of involvement as a traditional classroom. Virtual classroom software allows students who are unable to attend in-person classes to participate. Teachers can interact with students and interact with instructional materials, view presentations and videos, and take tests in real time using the virtual classroom environment. [ABSTRACT FROM AUTHOR]

We needed electricity at high rate for our day to day life and for our wellbeing life. Because of this lot of electricity is becoming waste daily. proposal for usage of waste electricity from foot step energy with human action was very much useful and important for more crowded countries were public places are over populated and more number of peoples move around the world this total human energy is being wasted and it can be made for usage of daily life by great innovation and populated power lands will become very useful power sources in populated countries. In this project we kept the piezoelectric tile in the staircase, so that the outcome will be more when compared to the piezoelectric tile kept on normal platform. The voltage produced while kept at staircase is 24V while if we kept it in the normal platform the voltage would be 14V. [ABSTRACT FROM AUTHOR]

Aluminum alloys are used primarily to produce rings, structural components, automotive systems, and aerospace components. Fusion welds are difficult to perform on these alloys due to their poor joint efficiency, solidification cracking, and alloy segregation in aluminum joints. Thus, solid-state welding techniques are preferred for their higher performance with fewer defects, as well as their eco-friendliness. In the present study, solid-state friction stir welding (FSW) process is used for joining dissimilar aluminum alloys AA5083/AA6061. Weld specimens were fabricated for dimensions of 150 x 150 x 6 mm. The rotational speed, the transverse speed, and the tilt angle were set to 1000 rpm, 25 mm/min, and 2°, respectively. The welded specimens were evaluated for their microstructural and mechanical properties. The mode of failure was observed by scanning electron microscope (SEM). As a result, the dissimilar joints showed a maximum tensile strength of 194.3 MPa and a maximum hardness of 86 Hv in the nugget zone. The maximum hardness was caused by recrystallizing grains in the nugget zone, and the rupture occurred at the heat-affected zone (HAZ) on the retreating side. [ABSTRACT FROM AUTHOR]

ENBHNHM crystals are properly and in a well manner grown by the solution growth methodology and are analyzed for XRD, NLO, CHNSO and computational methodologies and found that XRD gives the lattice parameters information and monoclinic type of system and NLO gives the nonlinearity as 1.74 than KDP for second harmonic generative crystal and CHNSO gives the composition of titled crystal by experimental and by theoretical way and software for elucidation and enactment of structure of the titled crystal. [ABSTRACT FROM AUTHOR]

Citric acid assisted barium titanate (CABT) nanostructured materials are prepared by facile hydrothermal route. The synthesized CABT samples are subjected to various characterization analyses such as XRD, SEM, TEM, UV, RTPL and dielectric studies. Powder XRD analysis revealed a single crystalline perovskite cubic crystal structure in the CABT sample. The elongated spherical-like morphology of the CABT sample was revealed by SEM and TEM analysis. CABT sample's band gap energy is estimated by the UV absorption analysis. RTPL emission studies showed the luminescence behavior of the nanostructured CABT sample. CABT sample has a low dielectric constant (εr) value at high frequencies, indicating improved optical quality with lesser defects. [ABSTRACT FROM AUTHOR]

Increasing insulin resistance in this sedentary era had led to an escalating growth of diabetes mellitus. The biocompatible nanomaterials with antidiabetic properties which control hyperglycemia should possess high antioxidant properties, Ag-dopedZnO nonmaterial's synthesized by using simple and cost-effective co-precipitation methoddoblige this purpose. The XRD characterization fortifies the pristine and purity ofboth pure and dopedZnOnanoparticles. SEM images spectacles its uniform size distribution all over the sample. The average crystal size around 20 nm without any protuberances. Anti-diabetic (AD) activity of pure and Ag-dopedZnOsamples are analyzedforalpha-amylase inhibition along with acrobase which is formerly used potent inhibitor. According to perusal, the Inhibitory Concentration (IC 50) of every individual sample is been analyzed as 15.96 for acarbose and 22.20 for pure ZnO and 21.77 for the case of Ag- dopedZnO nanoparticles. All the case inhibition surges with the enhancement in concentration, however Ag doped ZnO is best behoves for enhanced AD activity. [ABSTRACT FROM AUTHOR]

The combined liquid illustration of cough syrup is analyzed for the parameters such as ultrasonic velocity (U) with frequency range of 2 MHz, density (ρ), viscosity (η) for commercial as well as herbal cough syrup. Acoustical parameters for instance adiabatic compressibility (βa), intermolecular free length (Lf), acoustic impedance (Z), relaxation time (τ) were determined using the normal forms and procedures of data. In understanding the proper intermolecular interactions, density, viscosity, ultrasonic velocity and other parameters high frequency ultra sound interferometer is used which plays an imperative role and FTIR spectra have been used to categorize the functional groups in the liquid specimens of various cough syrups of synthetic and commercial ones. In order to prevent the dental degradation, the pH value is found to measure the acidity/basicity of cough syrups of all categories. [ABSTRACT FROM AUTHOR]

The ZnO-CA nanocomposite film was fabricated using solution casting method. The crystalline nature of the nanofilm was characterized using x-ray diffraction technique and surface morphology was studied by using scanning electron microscopy. The factors affecting Cd (II) ion adsorption in a batch mode were studied including the solution pH, and contact time for determining removal efficiency. The adsorption isotherm could be described well with Langmuir. The maximum monolayer adsorption capacity for the removal of Cd (II) ions was found to be 104.36 mg/g. This shows that, this fabricated nanofilm is capable for using in real time application. [ABSTRACT FROM AUTHOR]

The optically transparent single crystals of Glycine Phosphite (GPI) doped with metals, rare earths, dyes and amino acid were grown by both solvent evaporation and temperature lowering techniques. Concentration of dopants was chosen depending on the category of dopants and quality of crystallization during the growth process. Incorporation of dopants was identified using ESR, AAS, ICP, XRF and UV-Visible spectral analyses. Single crystal XRD was carried out to determine the lattice parameters and to analyze the structural morphology of GPI with dopants. Crystalline perfection of crystals was determined by HRXRD analysis by means of FWHM values. Ferroelectric transition temperature was identified by dielectric and DSC measurements. Piezoelectric charge coefficient d33 and Hysteresis (P-E) loop was measured for crystals. Microhardness measurement was carried out for understanding the mechanical stability of the crystals, the mechanical properties such as elastic stiffness constant 'C11', yield strength 'σy' were calculated from hardness value. Meyer's index number was in the range of 1.6 to 2 for all the crystals. This indicates that the grown crystals are relatively soft materials. [ABSTRACT FROM AUTHOR]