(1, 3) solid burst-correcting optimal linear codes over GF(5)

TARUN LATA 장전수학회 2018 Proceedings of the Jangjeon mathematical society Vol.21 No.4

In 2012, Das [5] had obtained a lower bound on the neces- sary number of parity-check digits in an (n = n₁ + n₁, k) linear codes over GF(2) which are optimal in a specic sense viz. which are capa- ble to correct single errors in the rst sub-block of length n1 and solid bursts of length 3 or less in the second sub-block of length n2 as well as gave sucient condition for the existence of such codes. Later, Lata and Tyagi [9] had studied these codes over GF(3). In this paper, the author examines the possibility of the existence of such codes over GF(5).

Orthotropic magneto-thermoelastic solid with multi-dual-phase-lag model and hall current

Lata, Parveen,Himanshi, Himanshi Techno-Press 2021 Coupled systems mechanics Vol.10 No.2

The present research deals with the investigation of the effect of hall current in an orthotropic magneto-thermoelastic medium with two temperature in the context of multi-phase-lag heat transfer due to thermomechanical sources. The bounding surface is subjected to linearly distributed and concentrated loads(mechanical and thermal source).Laplace and Fourier transform techniques are used to solve the problem. The expressions for displacement components,stress components and conductive temperature are derived in transformed domain and furtherin physical domain with the help of numerical inversion techniques. The effect ofrotation and hall parameter hasshown with the help of graphs.

Time harmonic interactions in fractional thermoelastic diffusive thick circular plate

Lata, Parveen Techno-Press 2019 Coupled systems mechanics Vol.8 No.1

Here in this investigation, a two-dimensional thermoelastic problem of thick circular plate of finite thickness under fractional order theory of thermoelastic diffusion has been considered in frequency domain. The effect of frequency in the axisymmetric thick circular plate has been depicted. The upper and lower surfaces of the thick plate are traction free and subjected to an axisymmetric heat supply. The solution is found by using Hankel transform techniques. The analytical expressions of displacements, stresses and chemical potential, temperature change and mass concentration are computed in transformed domain. Numerical inversion technique has been applied to obtain the results in the physical domain. Numerically simulated results are depicted graphically. The effect frequency has been shown on the various components.

Effect of hall current in Transversely Isotropic magneto thermoelastic rotating medium with fractional order heat transfer due to normal force

Lata, Parveen,Kaur, Iqbal Techno-Press 2018 Advances in materials research Vol.7 No.3

This investigation is focused on the study of effect of hall current in transversely isotropic magneto thermoelastic homogeneous medium with fractional order heat transfer and rotation. As an application the bounding surface is subjected to normal force. The research becomes more interesting due to interaction of Hall current with the effect of rotation as it has found various applications. Laplace and Fourier transform is used for solving field equations. The analytical expressions of temperature, displacement components, stress components and current density components are computed in the transformed domain. The effects of hall current and fractional order parameter at different values are represented graphically.

Plane wave propagation in transversely isotropic magneto-thermoelastic rotating medium with fractional order generalized heat transfer

Lata, Parveen,Kaur, Iqbal Techno-Press 2019 Structural monitoring and maintenance Vol.6 No.3

The aim of the present investigation is to examine the propagation of plane waves in transversely isotropic homogeneous magneto thermoelastic rotating medium with fractional order heat transfer. It is found that, for two dimensional assumed model, there exist three types of coupled longitudinal waves (quasi-longitudinal, quasi-transverse and quasi-thermal waves). The wave characteristics such as phase velocity, attenuation coefficients, specific loss, penetration depths, energy ratios and amplitude ratios of various reflected and transmitted waves are computed and depicted graphically. The conservation of energy at the free surface is verified. The effects of rotation and fractional order parameter by varying different values are represented graphically.

Effect of rotation and inclined load in a nonlocal magneto-thermoelastic solid with two temperature

Lata, Parveen,Singh, Sukhveer Techno-Press 2022 Advances in materials research Vol.11 No.1

This work deals with the two-dimensional deformation in a homogeneous isotropic nonlocal magneto-thermoelastic solid with two temperatures under the effects of inclined load at different inclinations. The mathematical model has been formulated by subjecting the bounding surface to a concentrated load. The Laplace and Fourier transform techniques have been used for obtaining the solution to the problem in transformed domain. The expressions for nonlocal thermal stresses, displacements and temperature are obtained in the physical domain using a numerical inversion technique. The effects of nonlocal parameter, rotation and inclined load in the physical domain are depicted and illustrated graphically. The results obtained in this paper can be useful for the people who are working in the field of nonlocal thermoelasticity, nonlocal material science, physicists and new material designers. It is found that there is a significant difference due to presence and absence of nonlocal parameter.

Effect of inclined load on transversely isotropic magneto thermoelastic rotating solid with time harmonic source

Lata, Parveen,Kaur, Iqbal Techno-Press 2019 Advances in materials research Vol.8 No.2

The present research deals with the time harmonic deformation in transversely isotropic magneto thermoelastic solid with two temperature (2T), rotation and without energy dissipation due to inclined load. Lord-Shulman theory has been formulated for this mathematical model. The entire thermo-elastic medium is rotating with a uniform angular velocity. The Fourier transform techniques have been used to find the solution to the problem. The displacement components, stress components and conductive temperature distribution with the horizontal distance are computed in the transformed domain and further calculated in the physical domain using numerical inversion techniques. The effect of time harmonic source and rotation is depicted graphically on the resulting quantities.

Larvicidal Efficiency of Certain Seed Extracts Against Anopheles Stephensi, with Reference to Azadirachta indica

Lata Batabyal,Preeti Sharma,Lalit Mohan,Prejwltta Maurya,C.N. Srivastava 한국응용곤충학회 2007 Journal of Asia-Pacific Entomology Vol.10 No.3

The toxicity of seed extracts of three Indian medicinal plants, Azadirachta indica, Momordica charantia and Ricinus communis, was evaluated for their larvicidal efficacy against Anopheles stephensi. The methanol extract of A. indica exhibited potent larvicidal activity with LC50 15.25 and 12.70 ppm and LC90 46.79 and 45.56 ppm after 24 and 48 hrs, respectively, followed by methanol extract of R. communis with LC50 54.95 and 23.06 ppm and LC90 251.03 and 144.54 ppm after 24 and 48 hrs of post treatment, respectively. In case of M. charantia, the carbon tetrachloride extract possess potential larvicidal efficacy with LC50 values 87.00 and 57.53 ppm and LC90 301.20 and 262.21 ppm after 24 and 48 hrs of exposure period. The results indicate that A. indica methanol extract was most potential mosquito larvicide and can be use as alternate potential to synthetic insecticides.

Propagation of plane wave in transversely isotropic magneto-thermoelastic material with multi-dual-phase lag and two temperature

Lata, Parveen,Kaur, Iqbal,Singh, Kulvinder Techno-Press 2020 Coupled systems mechanics Vol.9 No.5

This research is devoted to the study of plane wave propagation in homogeneous transversely isotropic (HTI) magneto-thermoelastic rotating medium with combined effect of Hall current and two temperature due to multi-dual-phase lag heat transfer. It is analysed that, for 2-D assumed model, three types of coupled longitudinal waves (quasi-longitudinal, quasi-transverse and quasi-thermal) are present. The wave characteristics like phase velocity, specific loss, attenuation coefficients, energy ratios, penetration depths and amplitude ratios of transmitted and reflected waves are computed numerically and illustrated graphically and compared for different theories of thermoelasticity. Some particular cases are also derived from this research.

Effect of thermal laser pulse in transversely isotropic Magneto-thermoelastic solid due to Time-Harmonic sources

Lata, Parveen,Kaur, Iqbal,Singh, Kulvinder Techno-Press 2020 Coupled systems mechanics Vol.9 No.4

The present research deals with the time-harmonic deformation in transversely isotropic magneto thermoelastic solid with two temperature (2T), rotation due to inclined load and laser pulse. Generalized theory of thermoelasticity has been formulated for this mathematical model. The entire thermo-elastic medium is rotating with uniform angular velocity and subjected to thermally insulated and isothermal boundaries. The inclined load is supposed to be a linear combination of a normal load and a tangential load. The Fourier transform techniques have been used to find the solution to the problem. The displacement components, stress components, and conductive temperature distribution with the horizontal distance are computed in the transformed domain and further calculated in the physical domain using numerical inversion techniques. The effect of angle of inclination of normal and tangential load for Green Lindsay Model and time-harmonic source for Lord Shulman model is depicted graphically on the resulting quantities.