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Publisher: Sri Lanka Journals Online   (Total: 50 journals)   [Sort by number of followers]

Showing 1 - 50 of 50 Journals sorted alphabetically
Anuradhapura Medical J.     Open Access  
Bhumi : The Planning Research J.     Open Access   (Followers: 3)
Built-Environment Sri Lanka     Full-text available via subscription  
Ceylon J. of Otolaryngology     Open Access   (Followers: 1)
Ceylon Medical J.     Open Access   (SJR: 0.186, CiteScore: 0)
Engineer : J. of the Institution of Engineers, Sri Lanka     Open Access  
Galle Medical J.     Open Access  
Intl. J. of Prevention and Treatment of Substance Use Disorders     Open Access   (Followers: 5)
Intl. J. on Advances in ICT for Emerging Regions (ICTer)     Open Access   (Followers: 2)
J. of Agricultural Sciences     Open Access   (Followers: 1)
J. of Diagnostic Pathology     Open Access   (Followers: 8)
J. of Environmental Professionals Sri Lanka     Open Access  
J. of Management     Open Access   (Followers: 17)
J. of Science of the University of Kelaniya Sri Lanka     Open Access  
J. of the Ceylon College of Physicians     Open Access  
J. of the College of Community Physicians of Sri Lanka     Open Access  
J. of the National Science Foundation of Sri Lanka     Open Access   (Followers: 2, SJR: 0.157, CiteScore: 0)
J. of the Postgraduate Institute of Medicine     Open Access  
J. of the University Librarians Association of Sri Lanka     Open Access   (Followers: 4)
J. of the University of Ruhuna     Open Access   (Followers: 1)
Kelaniya J. of Management     Open Access  
Medico-Legal J. of Sri Lanka     Open Access  
Ruhuna J. of Science     Open Access  
Sabaragamuwa University J.     Open Access  
South-East Asian J. of Medical Education     Open Access  
Sri Lanka J. of Advanced Social Studies     Open Access   (Followers: 1)
Sri Lanka J. of Aquatic Sciences     Open Access   (Followers: 1)
Sri Lanka J. of Bio-Medical Informatics     Open Access  
Sri Lanka J. of Child Health     Open Access   (SJR: 0.112, CiteScore: 0)
Sri Lanka J. of Development Administration     Open Access  
Sri Lanka J. of Diabetes Endocrinology and Metabolism     Open Access  
Sri Lanka J. of Forensic Medicine, Science & Law     Open Access   (Followers: 1)
Sri Lanka J. of Obstetrics and Gynaecology     Open Access   (Followers: 1)
Sri Lanka J. of Psychiatry     Open Access   (Followers: 2)
Sri Lanka J. of Sexual Health and HIV Medicine     Open Access  
Sri Lanka J. of Social Sciences     Open Access   (Followers: 3, SJR: 0.185, CiteScore: 0)
Sri Lanka J. of Surgery     Open Access  
Sri Lanka J. of the Humanities     Open Access  
Sri Lankan J. of Anaesthesiology     Open Access   (Followers: 1, SJR: 0.11, CiteScore: 0)
Sri Lankan J. of Applied Statistics     Open Access  
Sri Lankan J. of Biology     Open Access  
Sri Lankan J. of Human Resource Management     Open Access   (Followers: 1)
Sri Lankan J. of Infectious Diseases     Open Access  
Sri Lankan J. of Medical Administration     Open Access  
Sri Lankan J. of Physics     Open Access  
Taprobanica : The J. of Asian Biodiversity     Open Access  
Tropical Agricultural Research     Open Access   (Followers: 1)
Tropical Agricultural Research and Extension     Open Access   (Followers: 2)
Vidyodaya J. of Management     Open Access  
Wayamba J. of Management     Open Access  
Similar Journals
Journal Cover
Sri Lankan Journal of Physics
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1391-5800 - ISSN (Online) 1391-5880
Published by Sri Lanka Journals Online Homepage  [50 journals]
  • Influence of Non -thermal Electron Parameter on Heavier Masses of Negative
           Ion Plasma

    • Abstract: In presence of non-thermal electrons, theoretical investigations on ion-acoustic solitary waves are made in a collisionless unmagnetized warm plasma consisting of positive and negative ions by the well known pseudopotential technique. The influence of non-thermal electron parameter on heavier masses (Q) of negative ion plasma for Sagdeev potential function, first and second order solitary wave solutions are mainly analysed and discussed here properly. Published on 2019-03-28 00:00:00
  • Applicability of natural rubber based polymer electrolyte for
           electrochemical double layer capacitors

    • Abstract: Natural rubber has received a great interest to be used for electrochemical applications recently. But, Sri Lankan natural rubber has not yet been considered for such activity other than exporting and using for some manufacturing processes. Main objective of the present study is investigating the candidacy of Sri Lankan natural rubber in electrochemical double layer capacitors. Methyl grafted natural rubber was dissolved in tetrahydrofuran and it was later mixed with a Li salt. Using the solvent casting method, it was possible to prepare a thin, bubble free film. It was sandwiched in between two identical Sri Lankan natural graphite electrodes. Performance evaluation was accomplished with cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge discharge test. Single electrode specific capacitance was depending on the potential window and the scan rate of cycling. Nyquist plots confirmed the capacitive behavior at low frequency region. The average specific discharge capacity was 0.31 Fg-1. Obtained results show that natural rubber electrolytes are suitable candidates for electrochemical double layer capacitors and they are also encouraging to proceed towards improving the performance further. Published on 2019-03-28 00:00:00
  • Approximate l-States Solutions to the Schrodinger Equation with
           Manning-Rosen plus Hellmann Potential via WKB Approximation Scheme

    • Abstract: The approximate analytical solutions of the radial Schrodinger equation have been obtained by the interaction of Manning-Rosen and Hellmann potentials which is a newly proposed potential. Using the Wentzel-Kramers-Brillouin WKB approach, we obtained the eigenstates solutions for any arbitrary angular momentum. Special cases of potential consideration have been discussed. Eigenenergy solutions to equations obtained play an important role in quantum mechanics because they contain a wealth of vital information regarding the system under consideration. Published on 2018-08-08 00:00:00
  • Dirac Equation with Unequal Scalar and Vector Potentials under Spin and
           Pseudospin Symmetry

    • Abstract: An approximate solution of the Dirac equation in the D-dimensional space is obtained under spin and pseudospin symmetry limits for the scalar and vector inversely quadratic Yukawa potential within the framework of parametric Nikiforov-Uvarov method using a suitable approximation scheme to the spin-orbit centrifugal term. The two components spinor of the wave function and their energy equations are fully obtained. Some numerical results are obtained for the energy level with various dimensions (D), quantum number (n), vector potential  and scalar potential. The results obtained under spin symmetry using either  or  are equal to the results obtained using. But under the pseudospin symmetry, the results obtained using or are not equal to the results obtained using. Published on 2018-05-15 00:00:00
  • Approximate Analytical Solutions of the Effective Mass Klein-Gordon
           Equation for Two Interacting Potentials

    • Abstract: In this study, the approximate analytical solutions of the relativistic Klein-Gordon equation in the spatial dimensions with unequal Coulomb-inverse Trigonometry scarf scalar and vector potentials for an effective mass function is investigated in the framework of supersymmetric and shape invariance method by employing a suitable approximation scheme to the centrifugal term. The energy equation for some special cases such as the Coulomb potential and inverse Trigonometry scarf potential are obtained. Using a certain transformation, the non-relativistic energy equation is obtained which is identical to the energy equation of the Hellmann potential. Published on 2018-02-15 00:00:00
  • Zn rechargeable cell with a gel polymer electrolyte based on an ionic

    • Abstract: Lithium rechargeable cells based on liquid electrolytes have been used for numerous applications due to their high performance. At present, it has been identified the possible hazardous effects of those cells. As an alternative, much research is focused on non-lithium rechargeable cells based on Gel Polymer Electrolytes (GPEs). Basically, a GPE is consisted of a salt and solvent mixture entrapped inside a polymer network. However, these solvents are toxic and flammable. This imposes a limitation for the safety of GPEs. This paper, reported about a Zn rechargeable cell having a GPE based on an ionic liquid which eliminates the need of solvents. The polymer used was Poly-Vinylidene Fluoride co Hexa FluoroPropylene (PVdF-co-HFP). As the salt, Zinc Tri-Fluoromethanesulfonate (Zn(CF3SO3)2 – ZnTF) was used and 1 Butyl 3 Methyl Immidazolium Tri-Fluoromethanesulfonate (1B3MITF) was used as the Ionic Liquid (IL). It was observed that there is an optimum salt concentration that results the highest conductivity in IL. A Zn rechargeable cell was fabricated using the optimized composition of the GPE. It was observed that the cell is suitable for low power requirements. Published on 2017-12-27 00:00:00
  • Capacitive and Bioenzymevoltaic Characteristics of Photosynthetic
           Chromolena Odorata – Nanostructured Zinc Oxide System

    • Abstract: Zinc Oxide nanoparticles (ZnO) have been successfully synthesized by a chemical method at a low temperature of 60°C and dried at 80°C. The matching of the observed 2q value with the JCPDS value of the XRD pattern showed that ZnO was synthesized. The pattern obtained showed high peaks as an indication of crystallinity at low temperature without annealing. The average grain size of the crystal obtained using Debye scherrer formular is 18.6 nm. The crystal structure lattice system is hexagonal wurzite structure. The SEM images obtained showed that the material is made up of agglomerated grains resulting in nanostructured islands. The direct optical band gap was obtained using Tauc’s relationship to be 2.4 eV. A bioenzymevoltaic cell was developed in form of a Dye Sensitized Solar Cell but with a photosynthetic material: Chromolaena Odorata acting as both the dye and the electrolyte. The short circuit current of 1.5 mA and open circuit voltage of 170 mV were obtained for the continuous and residual energy on the system. We found that the device exhibited a bio-capacitive effect, as the photosynthetic material generates electron and the energy is being stored in the system as much as 39 mA with a corresponding voltage of 196 mV. Published on 2017-10-17 00:00:00
  • Impact of Coronal Mass Ejection on different characteristic parameters of
           lower thermospheric region

    • Abstract: Protons, electrons, alpha particles, and heavier ions in the solar wind are emitted from the Sun’s coronal plasma. Energetic phenomenon such as a Coronal Mass Ejection (CME) releases high energy as electromagnetic radiation in the form of solar X-rays and γ-ray bursts. This intense radiation is responsible for ionizing the constituent particles of the various layers of Earth’s ionosphere. In the presence of perturbations of the thermospheric region produced by CME, different characteristic parameters are theoretically investigated through momentum and energy balance equations, equation of continuity and equation of state. Dispersive nature of the medium is investigated and altitude variations of resulting electric field are carried out. In the computation processes, data of the latest International Reference Ionosphere (IRI) models are used. The results obtained are to be compared and supported by the experimental findings from other researchers to understand the nature of the medium in detail. Published on 2017-08-16 00:00:00
  • Polyvinylidene fluoride based gel polymer electrolyte to be used in solar
           energy to electrical energy conversion

    • Abstract: There is a great attention towards fulfilling energy requirement via renewable energy sources. Solar energy is one of the uprising renewable energy sources for the planet earth. Dye sensitized solar cells (DSSCs) have been identified as a promising technology to harvest solar energy and to convert that to electricity. In this study, it was attempted to optimize the composition of a gel polymer electrolyte consisting with polyvinylidene fluoride (PVdF), ethylene carbonate (EC), propylene carbonate (PC), tetrahexylammonium iodide (Hex4NI) and iodide (I2) to be utilized for DSSC application. The composition was fine tuned to get the highest conductivity by varying the salt concentration. The composition, 100 PVdF / 400 EC / 400 PC / 150 Hex4NI / 7.3 I2 exhibited the highest conductivity of 3.43 x 10-3 Scm-1 at room temperature. Sample was purely an anionic conductor. DSSCs were fabricated in the configuration, FTO / TiO2 / Dye / GPE / Pt / FTO. The open circuit voltage and short circuit current density were 799 mV and 1.06 mA respectively. The calculated fill factor was 0.62 and the efficiency was 2.08%. Published on 2017-01-08 00:00:00
  • Temperature dependent structural Phase transition in Lead Mono Hydrogen
           Aresenate crystal

    • Abstract: With the use of the modified pseudospin lattice coupled-mode (PLCM) model by adding third-order and fourth-order phonon anharmonic interactions terms and the statistical Green’s function technique a phenomenological explanation of phase transition of the lead monohydrogen arsenate (PbHAsO4) crystal has been given. Expressions for shift, width, dielectric constant, loss tangent and modified ferroelectric soft mode frequency have been derived theoretically. By fitting model values of various quantities obtained from literature in these derived expressions, their temperature dependence has been evaluated numerically. Present theoretically results agree well with the experimental results of others. Published on 2017-01-08 00:00:00
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Heriot-Watt University
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