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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 201 - 265 of 265 Journals sorted by number of followers
Revista Científica de la Universidad Nacional del Este     Open Access   (Followers: 9)
Patterns     Open Access   (Followers: 5)
History of Science and Technology     Open Access   (Followers: 5)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Research Policy : X     Open Access   (Followers: 4)
Data     Open Access   (Followers: 4)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 4)
Frontiers in Climate     Open Access   (Followers: 4)
Research     Open Access   (Followers: 4)
MUST : Journal of Mathematics Education, Science and Technology     Open Access   (Followers: 4)
People and Nature     Open Access   (Followers: 4)
Journal of Composites Science     Open Access   (Followers: 3)
Discover Sustainability     Open Access   (Followers: 3)
Science & Technology Studies     Open Access   (Followers: 3)
Journal of Big History     Open Access   (Followers: 3)
Orbis Cógnita : Revista Científica     Open Access   (Followers: 3)
International Journal of Culture and Modernity     Open Access   (Followers: 2)
Citizen Science : Theory and Practice     Open Access   (Followers: 2)
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 2)
Jaunujų mokslininkų darbai     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Journal of Science and Technology     Open Access   (Followers: 1)
Uluslararası Bilimsel Araştırmalar Dergisi (IBAD)     Open Access   (Followers: 1)
International Journal of Research in Science     Open Access   (Followers: 1)
Scientonomy : Journal for the Science of Science     Open Access   (Followers: 1)
Revista Vivências em Ensino de Ciências     Open Access   (Followers: 1)
Global Journal of Science Frontier Research     Open Access   (Followers: 1)
Journal of Science and Engineering     Open Access   (Followers: 1)
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 1)
Rafidain Journal of Science     Open Access   (Followers: 1)
iScience     Open Access   (Followers: 1)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
ARPHA Conference Abstracts     Open Access   (Followers: 1)
Impact     Open Access   (Followers: 1)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
Revista Saber Digital     Open Access   (Followers: 1)
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
Experimental Results     Open Access   (Followers: 1)
AAS Open Research     Open Access   (Followers: 1)
Fundamental Research     Open Access  
BJHS Themes     Open Access  
South American Sciences     Open Access  
Middle European Scientific Bulletin     Open Access  
Journal of Alasmarya University     Open Access  
Research Integrity and Peer Review     Open Access  
Natural Sciences Education     Hybrid Journal  
Proceedings of the Indian National Science Academy     Full-text available via subscription  
Indian Journal of History of Science     Hybrid Journal  
RAC: Revista Angolana de Ciências     Open Access  
The Innovation     Open Access  
Journal of Responsible Technology     Open Access  
Natural Sciences     Open Access  
Revista de la Sociedad Científica del Paraguay     Open Access  
Rekayasa     Open Access  
Rihan Journal for Scientific Publishing     Open Access  
Türk Bilim ve Mühendislik Dergisi     Open Access  
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access  
Vilnius University Proceedings     Open Access  
Sciential     Open Access  
ARPHA Proceedings     Open Access  
Gaudium Sciendi     Open Access  
Crea Ciencia Revista Científica     Open Access  
Journal of Al-Qadisiyah for Pure Science     Open Access  
Revista Tecnológica     Open Access  
Himalayan Journal of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access  
Universidad, Ciencia y Tecnología     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access  
Acta Nova     Open Access  
Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Revista Politécnica     Open Access  
Reportes Científicos de la FaCEN     Open Access  
Jurnal Ilmiah Ilmu Terapan Universitas Jambi : JIITUJ     Open Access  
Revista Eletrônica Ludus Scientiae     Open Access  
Emergent Scientist     Open Access  
Journal of Scientific Research and Reports     Open Access  
Asian Journal of Advanced Research and Reports     Open Access  
Archives of Current Research International     Open Access  
Advances in Research     Open Access  
International Journal of Applied Science     Open Access  
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
J : Multidisciplinary Scientific Journal     Open Access  
Revista Binacional Brasil - Argentina: Diálogo entre as ciências     Open Access  
Revista Ciencia y Tecnología     Open Access  
Journal of Institute of Science and Technology     Open Access  
Journal of Science (JSc)     Open Access  
WikiJournal of Science     Open Access  
Acta Materialia Transilvanica     Open Access  
Integrated Research Advances     Open Access  
PENDIPA : Journal of Science Education     Open Access  
Open Conference Proceedings Journal     Open Access  
Naturen     Full-text available via subscription  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Sci     Open Access  
Maskana     Open Access  
Hoosier Science Teacher     Open Access  
Reports in Advances of Physical Sciences     Open Access  
Facets     Open Access  
Adıyaman University Journal of Science     Open Access  
Revista Brasileira de Iniciação Científica     Open Access  
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Scientific African     Open Access  
Scientific Journal of Mehmet Akif Ersoy University     Open Access  
Black Sea Journal of Engineering and Science     Open Access  
Fırat University Turkish Journal of Science & Technology     Open Access  
Gazi University Journal of Science     Open Access  
Middle East Journal of Science     Open Access  
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Engineering, Technology and Natural Sciences     Open Access  
Bulletin of the National Research Centre     Open Access  
Uni-pluriversidad     Open Access  
ConCiencia     Open Access  
Ciencia y Tecnología     Open Access  
Revista Bases de la Ciencia     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Ciência ET Praxis     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
International Annals of Science     Open Access  
Science Heritage Journal     Open Access  
Avrasya Terim Dergisi     Open Access  
International Scientific and Vocational Studies Journal     Open Access  
TÜBAV Bilim Dergisi     Open Access  
LOGIKA Jurnal Ilmiah Lemlit Unswagati Cirebon     Open Access  
Dalat University Journal of Science     Open Access  
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Respuestas     Open Access  
Science Diliman     Open Access  
Instruments     Open Access  
Revista Científica y Tecnológica UPSE     Open Access  
HardwareX     Open Access  
Sultan Qaboos University Journal for Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Sainstek : Jurnal Sains dan Teknologi     Open Access  
Revista de Información Científica     Open Access  
Indonesian Journal of Fundamental Sciences     Open Access  
Sainteknol : Jurnal Sains dan Teknologi     Open Access  
Jurnal Natural     Open Access  
Frontiers for Young Minds     Open Access  
Revista Ciência, Tecnologia & Ambiente     Open Access  
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Negative and No Positive Results     Open Access  
Revista Conhecimento Online     Open Access  
Nova     Open Access  
CienciaUAT     Open Access  
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Makara Journal of Science     Open Access  
Jurnal Sains Dasar     Open Access  
Indonesian Journal of Science and Technology     Open Access  
Ethiopian Journal of Science and Technology     Open Access  
Jurnal Matematika, Sains, Dan Teknologi     Open Access  
Heidelberger Jahrbücher Online     Open Access  
ARO. The Scientific Journal of Koya University     Open Access  
International Journal of Recent Contributions from Engineering, Science & IT     Open Access  
Estação Científica (UNIFAP)     Open Access  
The Winnower     Open Access  

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Journal of Scientific Research
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2070-0237 - ISSN (Online) 2070-0245
Published by Bangladesh Journals Online Homepage  [87 journals]
  • A Unified Approach to the Sandor-Smarandache Function

    • Authors: S. M. S. Islam, A. K. Z. Ahmed, H. Gunarto, A. A. K. Majumdar
      Pages: 699 - 720
      Abstract: The Sandor-Smarandache function, SS(n), is a recently introduced Smarandache-type arithmetic function, which involves binomial coefficients. It is known that SS(n) does not possess many of the common properties of the classical arithmetic functions of the theory of numbers. Sandor gave the expression of SS(n) when n ( ³ 3) is an odd integer. It is found that SS(n) has a simple form when n is even and not divisible by 3. In the previous papers, some closed-form expressions of SS(n) have been derived for some particular cases of n. This paper continues to find more forms of SS(n), starting from the function SS(24m). Particular attention is given to finding necessary and sufficient conditions such that SS(n) = n–5 and SS(n) = n–6. Based on the properties of SS(n), some interesting Diophantine equations have been studied. The study reveals that the form of SS(n) depends on the prime factors of the integer n in the natural order of the primes.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.56205
      Issue No: Vol. 14, No. 3 (2022)
       
  • Role of f(R,T) Gravity in Bianchi Type-V Dark Energy Model with
           Electromagnetic Field based on Lyra Geometry

    • Authors: B. P. Brahma, M. Dewri
      Pages: 721 - 733
      Abstract: In this paper, a Bianchi type V Dark energy cosmological model scenario is studied with the electromagnetic field in Lyra based on f(R,T) gravity. The source of the magnetic field is along the x axis. Field equations found in Lyra geometry with electromagnetic field (F23 ≠ 0) in f(R,T) gravity, by choosing f(R~,T) = f1(R~) + f2(T) with f1(R~) + μR~ and f2(T) = μT. A hybrid scale factor discusses the physical and dynamical aspects of f(R,T) gravity.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.56416
      Issue No: Vol. 14, No. 3 (2022)
       
  • Temperature-Dependent Ultrasonic Properties of Semiconducting M2CO2 (M=
           Ti, Zr, Hf) MXenes

    • Authors: P. K. Yadawa, N. Chaurasiya, S. Rai, A. K. Prajapati
      Pages: 735 - 748
      Abstract: Here, we have studied the elastic, ultrasonic, mechanical, and thermal behavior of temperature-dependent hexagonal oxygen-functionalized M2CO2 (M= Ti, Zr, Hf) MXenes. The higher-order linear and nonlinear elastic constants, viz., second-order (SOECs), and third-order (TOECs) have been computed using the Lenard Jones interaction potential model. For mechanical characterization, bulk modulus (B), shear modulus (G), Young's modulus (Y), Pugh's ratio (B / G), Poisson's ratio, and anisotropic index are evaluated using SOECs. Born's stability and Pugh's criteria are used to examine the nature and strength of the MXenes in all the temperatures. For the investigation of anisotropic behavior and its thermophysical properties, temperature-dependent ultrasonic velocities and thermal relaxation time have been calculated along with different orientations from the unique axis of the crystal. The ultrasonic attenuation (UA) of a longitudinal and shear wave due to phonon-phonon (p-p) interaction and thermoelastic relaxation mechanism were investigated for these oxygen-functionalized MXenes. Thermal conductivity is a principal contributor to the behavior of UA due to p-p interactions. Our analysis suggests that semiconductor Ti2CO2 MXenes show superior mechanical properties to other oxygen-functionalized MXenes. Computed elastic, ultrasonic, and thermal properties are correlated to evaluate the microstructural behavior of the materials useful for industrial applications.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.56976
      Issue No: Vol. 14, No. 3 (2022)
       
  • Gravitoelectromagnetism and Gravitomagnetic Clock Effect

    • Authors: B. K. Chakravorti, S. B. Faruque
      Pages: 749 - 754
      Abstract: We present a new and elegant method of derivation of the gravitomagnetic clock effect using gravitational Lorentz force, which appears in gravitoelectromagnetism. The result is precisely the same as that of general relativity in the Kerr field.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.57972
      Issue No: Vol. 14, No. 3 (2022)
       
  • Ranking Fuzzy Numbers with Mean Value of Points and Comparative Reviews

    • Authors: S. Prasad, A. Sinha
      Pages: 755 - 771
      Abstract: Even though various ranking fuzzy numbers approaches have been presented so far, none of them can always provide satisfactory results in every situation. Some are counterintuitive, and some are inconsistent for the same circumstances. To overcome the issues mentioned above, we present a new technique for ranking fuzzy numbers using the mean value of the two points. The points are taken on the left and the right membership functions (reference functions) such that they divide the respective membership function in the same ratio . The proposed technique determines the order of the fuzzy numbers significantly. To use this technique, the membership functions need not be normal and linear.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58133
      Issue No: Vol. 14, No. 3 (2022)
       
  • Existence Solutions of ABC-Fractional Differential Equations with Periodic
           and Integral Boundary Conditions

    • Authors: M. O. Muhammad, A. Rafeeq
      Pages: 773 - 784
      Abstract: The nonlinear fractional differential equation (FDE) is discussed in this study. First, we will investigate the existence and uniqueness solution of the nonlinear differential equation to the Atangana-Baleanu fractional derivative in the sense of Caputo with the initial periodic condition and integral boundary condition by Krasnoselskii’s and Banach fixed point theorems. Then, we will study the Hyers-Ulam stability of our problem. Finally, we presented an example to demonstrate the use of our main theorems.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58210
      Issue No: Vol. 14, No. 3 (2022)
       
  • Unbiased Modified Two-Parameter Estimator for the Linear Regression Model

    • Authors: A. O. Abidoye, I. M. Ajayi, F. L. Adewale, J. O. Ogunjobi
      Pages: 785 - 795
      Abstract: This study centers on estimating parameters in a linear regression model in the presence of multicollinearity. Multicollinearity poses a threat to the efficiency of the Ordinary Least Squares (OLS) estimator. Some alternative estimators have been developed as remedial measures to the earlier mentioned problem. This study introduces a new unbiased modified two-parameter estimator based on prior information. Its properties are also considered; the new estimator was compared with other estimators’ Mean Square Error (MSE). A numerical example and Monte Carlo simulation were used to illustrate the performance of the new estimator.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58234
      Issue No: Vol. 14, No. 3 (2022)
       
  • Effects on Unsteady MHD Flow of a Nanofluid for Free Convection past an
           Inclined Plate

    • Authors: S. M. O. Gani, M. Y. Ali, M. A. Islam
      Pages: 797 - 812
      Abstract: This paper deals with a similarity solution of unsteady magneto hydrodynamics two-dimensional boundary layer flow of a nanofluid for free convection past an inclined plate. Using similarity transformations, the governing equations are reduced into a set of non-linear ordinary differential equations. The transformed dimensionless equations are then solved numerically using the Nachtsheim-Swigert iteration technique and the order Runga-Kutta method. The effects of buoyancy-ratio parameter, Magnetic parameter, Brownian motion parameter, Thermophoresis parameter, Brownian diffusion parameter, unsteadiness, and other driving parameters on the velocity profile, temperature profile, and concentration profile are represented graphically and discussed in detail. The numerical values of several involved parameters on Skin-friction co-efficient, local Nusselt, and Sherwood numbers are presented in tabular form.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58301
      Issue No: Vol. 14, No. 3 (2022)
       
  • Interpretation of Acousting Sounding Records with Meterological Parameters
           and Ventilation Coefficient Over Delhi

    • Authors: P. Singh, K. Soni, A. S. Nair, N. Kumar, R. Sharma
      Pages: 813 - 830
      Abstract: Atmospheric Boundary Layer (ABL) height is an important parameter in defining the Ventilation Coefficient (VC) of any area. In this work, SODAR (Sound Detection and Ranging) observed data of different echograms for the year 2020 has been used for structure identification. The interpretation of ecograms is often not straight-forward. In this paper, an interpretation of different echograms along with meteorological parameters over Delhi is described. The ecogram structures were interpreted along with VC analysis. It is observed from the structures that during foggy days, VC values vary from day to day in the winter, with daily maximum values occurring between 13:00 and 15:00 h. The daytime values varied significantly from sunrise to sunset, while the night-time values remained relatively stable (200 m2/s). However, due to fog diurnal variation from 16:00 h to 11:00 h, that is from evening to all night and then the next morning until 12:00 h, the atmospheric condition remained stable. At maximal wind speeds, a maximum VC of 1600 m2/s (at 12:00 h) was observed during extended fumigation. With minimal wind speeds and ABL height, a minimum VC of 100 m2/s (at 20:00 h) was observed. However, both VCs were smaller than the optimal VC for 6000 m2/s safe dispersion.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58317
      Issue No: Vol. 14, No. 3 (2022)
       
  • Microstructure, Optical and Electrical Properties of Cu-Cu2O
           Core-Shell Nanostructures

    • Authors: O. Mondal
      Pages: 831 - 842
      Abstract: Composites of nanometre-sized copper core–copper oxide (Cu-Cu2O) shell with different diameters were synthesized by a facile one step co-solvent technique. By the analysis of X-ray diffraction (XRD) and transmission electron microscope (TEM) data, the resultant particles were confirmed to be pure and nanocrystalline in nature. The perfect core-shell structure of nanocrystalline Cu-Cu2O was confirmed by using high resolution TEM. The presence of pure Cu and Cu2O was further confirmed from optical absorbance spectrum and Fourier transform infrared (FT-IR) spectroscopy. The tailoring of position of optical absorption peaks, originating from Cu or Cu2O nanoparticles, is possible by modulating the oil to water ratio, which controls the size of the composite particles and thickness of Cu2O. Drastic change of electrical resistivity with change in thickness of shell, has been observed. Variation of resistivity with temperature delineates a semiconducting nature with two distinct activation processes. Results demonstrate that the activation energies for the core-shell nanostructure composites were found to be smaller than the bulk Cu2O. Photoluminescence spectrum further confirms the semiconducting nature of the composite. In addition, the kinetic of core-shell morphology formation is also discussed briefly.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58384
      Issue No: Vol. 14, No. 3 (2022)
       
  • Self Adaptive Fuzzy Controller for Supplementary Oxygen Supply to the
           Respiratory Distress Patients

    • Authors: I. Naskar, A. K. Pal
      Pages: 843 - 860
      Abstract: In this paper, respiratory irregularities of humans are investigated, and a self Adaptive Fuzzy Logic-based Proportional plus Derivative Controller (AFLPDC) is designed to provide a controlled supply of oxygen to the patient, suffering from breathlessness. The Fuzzy Logic-based Proportional plus Derivative Controller (FLPDC) is tuned, by implementing an adaptive scheme, which provides desired control action according to the process parameter variations. The electrical equivalent model of the respiratory system is developed, and the model is validated with the help of a Spirometer and MATLAB System Identification Toolbox. To build up this model, the respiratory tract is well thought out into four sections: the nasal cavity, trachea, bronchi, and finally, the alveolar sacs. Each of these sections is represented as a series of combinations of Resistance, Inductance, and Compliance. The control capability of the proposed AFLPDC is investigated on the derived respiratory model. The supply of the desired level of supplemental oxygen by AFLPDC to the patients suffering from the diseases like Bronchitis and Emphysema during respiratory dysfunction is observed in the MATLAB SIMULINK environment without human intervention. The response revealed by AFLPDC is compared with the responses of the conventional PD controller and the Fuzzy Logic-based PD controller (FLPDC).
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58391
      Issue No: Vol. 14, No. 3 (2022)
       
  • Does the Solution to the Non-linear Diophantine Equation 3x+35y=Z2
           Exist'

    • Authors: D. Biswas
      Pages: 861 - 865
      Abstract: This paper investigates the solutions (if any) of the Diophantine equation 3x + 35y = Z2, where , x, y, and z are whole numbers. Diophantine equations are drawing the attention of researchers in diversified fields over the years. These are equations that have more unknowns than a number of equations. Diophantine equations are found in cryptography, chemistry, trigonometry, astronomy, and abstract algebra. The absence of any generalized method by which each Diophantine equation can be solved is a challenge for researchers. In the present communication, it is found with the help of congruence theory and Catalan’s conjecture that the Diophantine equation 3x + 35y = Z2 has only two solutions of (x, y, z) as (1, 0, 2) and (0, 1, 6) in non-negative integers.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58535
      Issue No: Vol. 14, No. 3 (2022)
       
  • Impact of Zn-doped Manganese Oxide Nanoparticles on Structural and Optical
           Properties

    • Authors: V. Yadav, R. Shukla, K. S. Sharma
      Pages: 867 - 876
      Abstract: In the present work, the structural and optical properties of pure and zinc-doped manganese oxide nanoparticles prepared by the sol-gel method have been studied for doping concentrations of 5, 10, and 15 %. The XRD patterns reveal that the cubic phase of pure manganese oxide nanoparticles is changed to tetragonal on doping with Zn. The surface morphology of pure and Zn doped manganese oxide nanoparticles has been studied by Scanning Electron Microscopy (SEM), which reveals appreciable changes in size and shape of the nanoparticles as the doping level of Zn is increased. The optical properties studied by UV-Visible spectroscopy further reveal that the energy band gap increases with a decrease in the size of nanoparticles.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58542
      Issue No: Vol. 14, No. 3 (2022)
       
  • Laminar Forced Convection MHD Couette-Poiseuille Flow with Viscous and
           Joule Dissipations

    • Authors: B. C. Sarkar
      Pages: 877 - 889
      Abstract: The laminar forced convection MHD Couette-Poiseuille flow of a viscous incompressible fluid with the viscous and Joule dissipations has been studied. Two different orientations of the wall thermal boundary-conditions have been considered, namely: the constant heat-flux at the upper moving plate with the adiabatic stationary lower plate and the constant heat flux at the stationary lower plate with an adiabatic moving upper plate. The governing equations are solved analytically. It is observed that the fluid velocity increases near the stationary plate and it decreases near the moving plate with an increase in magnetic parameter. The temperature field is significantly affected by the modified Brinkman number. The fluid temperature increases when the lower plate is adiabatic and the upper plate is at positive constant heat flux while it decreases in case the lower plate is at negative constant heat flux and the upper plate is adiabatic with an increase in modified Brinkman number for the combined effects of viscous and Joule dissipations. Further, the fluid temperature decreases for positive heat flux case while it increases for negative heat flux case with an increase in either magnetic parameter or velocity parameter when the combined effects of viscous and Joule dissipations are taken into account.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58945
      Issue No: Vol. 14, No. 3 (2022)
       
  • Study on Estimation of Inhalation and Ingestion Dose due to 222Rn
           Concentration in Different Types of Ground Water of Some Taluks of Uttara
           Kannada District, Karnataka, India

    • Authors: S. Suresh, E. Srinivasa
      Pages: 891 - 900
      Abstract: The primary goal of this study was to determine the risk due to radon concentration in drinking water. Water is essential for most of the life on the Earth, and the quality of drinking water is a key criterion for one's health. Radon (222Rn) and radium (226Ra) are the radioactive elements that can be found in water. Thirty samples of drinking water were collected in Haliyal, Joida, and Mundgod taluks of Uttara Kannada district. Emanometry technique was used to determine the concentration of 222Rn activity. The activity concentration of 222Rn in water varies between 3.78 ± 0.38 Bq l-1. and 135.96 ± 1.72 Bq l-1 with a mean value of 26.23 ± 0.65 Bq l-1. The cumulative average annual effective doses for all of the samples under investigation are well below the safe limit of 100 µSv y-1 suggested by WHO.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.57163
      Issue No: Vol. 14, No. 3 (2022)
       
  • Photocrosslinking Property of Certain Synthesized
           Bis(arylidene)cycloalkanone based Random Copolyesters with Computational
           Support and their Anticancer Study

    • Authors: B. Kiruba, S. Chidambaravinayagam
      Pages: 901 - 915
      Abstract: The synthesis of random copolyesters involves polycondensation of arylidene diol with curcumin and glutaryl chloride in 1:1:2 ratio. For this monomers, 2,6-bis-(4-hydroxy benzylidene) cyclohexanone, 2,6-bis-(4-hydroxy-3-methoxybenzylidene)cyclohexanone, 2,5-bis-(4-hydroxybenzylidene)cyclopentanone and 2,5-bis-(4-hydroxy-3-methoxy benzylidene)cyclopentanone were synthesized using acid catalyzed Claisen-Schmidt reaction. Qualitative solubility tests reveal that prepared copolyesters dissolve well in polar solvents. The successful formation of copolyesters was confirmed by Fourier transform-infrared spectroscopy and proton nuclear magnetic resonance spectroscopic techniques. Glass transition temperature of prepared polymers was calculated using differential scanning calorimetric analysis. Further, the prepared copolyesters were utilized as in vitro anticancer agents against breast cancer MCF7 cells. The experimental results of phototcrosslinking property of the copolyesters was compared with that of computational method by DFT calculations which shows coincidence of both.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.57161
      Issue No: Vol. 14, No. 3 (2022)
       
  • Comparative Study of Molecular Interaction in Ternary Liquid Mixtures of
           Polar and Non-Polar Solvents

    • Authors: B. Samantaray, M. K. Praharaj, B. R. Das, S. P. Das
      Pages: 917 - 929
      Abstract: Ultrasonic velocity measurements, density measurements, and viscometric studies were conducted for the ternary mixture of pyridine and toluene separately with N, N-dimethylformamide (DMF) in butanol, at different temperatures and for different concentrations of component liquids. Using these basic experimental data, various acoustic and thermodynamic parameters, such as adiabatic compressibility (β), free length (Lf,), free volume (Vf), etc. were calculated. Also, Excess thermo-acoustical parameters were calculated from the experimentally measured data. The outcomes were expressed in terms of the molecular interactions and the variations in parameters under varying solute concentrations. A comparative study is discussed. Variation in the above parameters for the different mixtures is indicative of the nature of the interactions between the components in the liquid mixture. Concluding remarks regarding intermolecular interactions are provided.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.57587
      Issue No: Vol. 14, No. 3 (2022)
       
  • Excess Thermodynamic Properties of Binary Mixtures of Dimethyl Malonate
           with some Branched Alkanols

    • Authors: K. P. Krishna, P. B. Sandhyasri, K. Anitha, G. R. Babu, K. R. Kumar, R. R. Raju
      Pages: 931 - 941
      Abstract: The intermolecular hydrogen bond interactions in the dimethyl malonate with some branched alkanols (2-methyl-1-propanol, 2-propanol, and 2-butanol) binary mixture have been studied experimentally and theoretically. The ultrasonic velocities U, densities ρ of binary mixtures of dimethyl malonate with 2-methyl-1-propanol, 2-propanol, 2-butanol from 303.15 K to 318.15 K were measured. Excess molar volume (VE), deviation in adiabatic compressibility (Δβad) and excess intermolecular free length ( LEf) have been calculated from the measured experimental data. It is observed that the order of interactions in dimethyl malonate – branched alkanols mixtures is 2-methyl-1-propanol > 2-propanol > 2-butanol.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.57976
      Issue No: Vol. 14, No. 3 (2022)
       
  • Lifestyle and Dietary Factors Causing Microsatellite Instability Gastric
           Cancer Detected using Ensemble Modeling

    • Authors: S. K. Brindha, P. Charkarborthy, S. Chenkual, J. Zohmingthanga, J. L. Pautu, P. Nath, A. Maitra, N. S. Kumar, L. Hmingliana
      Pages: 943 - 958
      Abstract: Aim of this study is to identify diet and lifestyle patterns that cause microsatellite instability gastric cancer (MSI-GC) using supervised machine learning algorithms. There were 142 genetic variants acquired via targeted resequencing of 60 biomarker genes from gastric tumor samples and tabulated with respect to MSI status, diet and lifestyle characteristics. Four classifiers (logistic regression, random forest, logistic regression, multilayer perceptron) were used to train the data and evaluated based on their classification efficiency. Data analysis revealed features extracted using ridge regression: extra salt, smoked food, smokeless tobacco products (Khaini /sadha), alcohol and betel nut leaf with lime (khuva) were the core factors for causing MSI-GC. The extracted features were exploited using random forest and multilayer perceptron classifiers, which has produced accuracy, precision, recall, F1 score, and Receiver operating characteristics (ROC) curve of 96 %. The brier score was 0.04 and Matthews correlation coefficient (MCC) was +0.91. Linear regression results revealed khuva was main driving factor and extra salt, smoked food, khaini/sadha and alcohol were confounding factors to cause MSI-GC. This is a first-time report that integrates mutation and diet-lifestyle data using machine learning, to precisely identify the driving and confounding factors for causing MSI-GC.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58331
      Issue No: Vol. 14, No. 3 (2022)
       
  • Quantum Dialogue Protocols: A Review

    • Authors: S. Chauhan , G. Ahmed, N. L. Gupta
      Pages: 959 - 972
      Abstract: In recent years, quantum cryptography (QC) has received much attention in academic and commercial fields. It has proved to be a promising technology for ensuring the security of future data transmission. In this paper, we review the development of a remarkable area of quantum cryptography, i.e., Quantum dialogue (QD), which is currently in the theoretical stage but is of great interest to academics. We will discuss the quantum dialogue protocols in two categories, single photon-based protocols, and entanglement-based protocols, depending on the quantum resource employed. Finally, experimental implementation, comparison and analysis, security and practical feasibility, and future work for the above-mentioned branch will also be discussed.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.53280
      Issue No: Vol. 14, No. 3 (2022)
       
  • Polymer-Based Nanocomposite Coating Methods: A Review

    • Authors: S. Mathai, P. S. Shaji
      Pages: 973 - 1002
      Abstract: Coating technology is widely recognized as the most cost-effective and efficient method of preventing metal corrosion. Polymers have been regarded as a powerful coating material owing to their excellent barrier qualities, simplicity of modification, and large-scale production. Nanomaterials differ significantly from their physical and chemical properties, and have been hailed as highly promising functional materials in a wide range of applications, affecting nearly every aspect of science and technology. The addition of organic or inorganic nanofiller particles to polymer nanocomposite coatings may improve corrosion protection and lower the possibility of blistering or delamination. High hardness for polymer coatings, on the other hand, could be achieved by forming hard nanocrystalline phases inside the matrix. This article provides an overview of recent developments in polymer nanocomposite coatings in terms of their history, coating methods, properties, features, and drawbacks.
      PubDate: 2022-09-01
      DOI: 10.3329/jsr.v14i3.58338
      Issue No: Vol. 14, No. 3 (2022)
       
 
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