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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 1 - 200 of 265 Journals sorted alphabetically
AAS Open Research     Open Access   (Followers: 1)
Accountability in Research: Policies and Quality Assurance     Hybrid Journal   (Followers: 19)
Acta Materialia Transilvanica     Open Access  
Acta Nova     Open Access   (Followers: 2)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
Acta Scientifica Naturalis     Open Access   (Followers: 4)
Adıyaman University Journal of Science     Open Access  
Advanced Science     Open Access   (Followers: 15)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Research     Open Access  
Advances in Science and Technology     Full-text available via subscription   (Followers: 18)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 7)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 3)
Alfarama Journal of Basic & Applied Sciences     Open Access   (Followers: 12)
American Academic & Scholarly Research Journal     Open Access   (Followers: 4)
American Journal of Applied Sciences     Open Access   (Followers: 22)
American Journal of Humanities and Social Sciences     Open Access   (Followers: 14)
ANALES de la Universidad Central del Ecuador     Open Access   (Followers: 1)
Anales del Instituto de la Patagonia     Open Access  
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 2)
Apuntes de Ciencia & Sociedad     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 1)
Archives Internationales d'Histoire des Sciences     Partially Free   (Followers: 5)
Archives of Current Research International     Open Access  
ARO. The Scientific Journal of Koya University     Open Access  
ARPHA Conference Abstracts     Open Access   (Followers: 1)
ARPHA Proceedings     Open Access  
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access  
Asian Journal of Advanced Research and Reports     Open Access  
Asian Journal of Scientific Research     Open Access   (Followers: 2)
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 5)
Australian Field Ornithology     Full-text available via subscription   (Followers: 1)
Australian Journal of Social Issues     Hybrid Journal   (Followers: 6)
Avrasya Terim Dergisi     Open Access  
Bangladesh Journal of Scientific Research     Open Access  
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 1)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 11)
BIBECHANA     Open Access  
Bilge International Journal of Science and Technology Research     Open Access  
Bioethics Research Notes     Full-text available via subscription   (Followers: 15)
BJHS Themes     Open Access   (Followers: 2)
Black Sea Journal of Engineering and Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of the National Research Centre     Open Access  
Butlletí de la Institució Catalana d'Història Natural     Open Access  
Chain Reaction     Full-text available via subscription  
Ciencia Amazónica (Iquitos)     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia Ergo Sum     Open Access  
Ciência ET Praxis     Open Access  
Ciencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Citizen Science : Theory and Practice     Open Access   (Followers: 3)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Applied Sciences     Open Access  
Comunicata Scientiae     Open Access  
ConCiencia     Open Access  
Conference Papers in Science     Open Access  
Configurations     Full-text available via subscription   (Followers: 11)
COSMOS     Hybrid Journal   (Followers: 1)
Crea Ciencia Revista Científica     Open Access  
Cuadernos de Investigación UNED     Open Access  
Current Issues in Criminal Justice     Hybrid Journal   (Followers: 15)
Current Research in Geoscience     Open Access   (Followers: 6)
Dalat University Journal of Science     Open Access  
Data     Open Access   (Followers: 4)
Data Curation Profiles Directory     Open Access   (Followers: 9)
Dhaka University Journal of Science     Open Access  
Diálogos Interdisciplinares     Open Access  
Digithum     Open Access   (Followers: 2)
Discover Sustainability     Open Access   (Followers: 5)
Einstein (São Paulo)     Open Access  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Emergent Scientist     Open Access  
Enhancing Learning in the Social Sciences     Open Access   (Followers: 7)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Epiphany     Open Access   (Followers: 1)
Estação Científica (UNIFAP)     Open Access  
Ethiopian Journal of Education and Sciences     Open Access   (Followers: 5)
Ethiopian Journal of Science and Technology     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access  
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 4)
European Scientific Journal     Open Access   (Followers: 7)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Exchanges : the Warwick Research Journal     Open Access   (Followers: 1)
Experimental Results     Open Access   (Followers: 1)
Facets     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access  
Fırat University Turkish Journal of Science & Technology     Open Access  
Fontanus     Open Access   (Followers: 1)
Forensic Science Policy & Management: An International Journal     Hybrid Journal   (Followers: 242)
Frontiers for Young Minds     Open Access  
Frontiers in Climate     Open Access   (Followers: 5)
Frontiers in Science     Open Access   (Followers: 1)
Fundamental Research     Open Access  
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
Gaudium Sciendi     Open Access  
Gazi University Journal of Science     Open Access  
Ghana Studies     Full-text available via subscription   (Followers: 15)
Global Journal of Pure and Applied Sciences     Full-text available via subscription  
Global Journal of Science Frontier Research     Open Access   (Followers: 1)
Globe, The     Full-text available via subscription   (Followers: 4)
HardwareX     Open Access  
Heidelberger Jahrbücher Online     Open Access  
Heliyon     Open Access   (Followers: 1)
Himalayan Journal of Science and Technology     Open Access  
History of Science and Technology     Open Access   (Followers: 5)
Hoosier Science Teacher     Open Access  
Impact     Open Access   (Followers: 1)
Indian Journal of History of Science     Hybrid Journal   (Followers: 2)
Indonesian Journal of Fundamental Sciences     Open Access  
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 2)
Indonesian Journal of Science and Technology     Open Access  
Ingenieria y Ciencia     Open Access   (Followers: 1)
Innovare : Revista de ciencia y tecnología     Open Access  
Instruments     Open Access  
Integrated Research Advances     Open Access  
Interciencia     Open Access  
Interface Focus     Full-text available via subscription  
International Annals of Science     Open Access  
International Archives of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access  
International Journal of Advanced Multidisciplinary Research and Review     Open Access  
International Journal of Applied Science     Open Access  
International Journal of Basic and Applied Sciences     Open Access   (Followers: 1)
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Culture and Modernity     Open Access   (Followers: 5)
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Engineering, Technology and Natural Sciences     Open Access  
International Journal of Innovation and Applied Studies     Open Access   (Followers: 4)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
International Journal of Network Science     Hybrid Journal   (Followers: 3)
International Journal of Recent Contributions from Engineering, Science & IT     Open Access  
International Journal of Research in Science     Open Access   (Followers: 1)
International Journal of Social Sciences and Management     Open Access   (Followers: 2)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 10)
International Letters of Social and Humanistic Sciences     Open Access  
International Science and Technology Journal of Namibia     Open Access   (Followers: 1)
International Scientific and Vocational Studies Journal     Open Access  
InterSciencePlace     Open Access  
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Investigacion y Ciencia     Open Access   (Followers: 1)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
iScience     Open Access   (Followers: 2)
Issues in Science & Technology     Free   (Followers: 8)
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Jaunujų mokslininkų darbai     Open Access   (Followers: 2)
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription  
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 9)
Journal of Advanced Research     Open Access   (Followers: 2)
Journal of Al-Qadisiyah for Pure Science     Open Access  
Journal of Alasmarya University     Open Access   (Followers: 2)
Journal of Analytical Science & Technology     Open Access   (Followers: 5)
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 1)
Journal of Big History     Open Access   (Followers: 4)
Journal of Composites Science     Open Access   (Followers: 4)
Journal of Diversity Management     Open Access   (Followers: 4)
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Institute of Science and Technology     Open Access  
Journal of Integrated Science and Technology     Open Access  
Journal of King Saud University - Science     Open Access  
Journal of Mathematical and Fundamental Sciences     Open Access  
Journal of Natural Sciences Research     Open Access   (Followers: 2)
Journal of Negative and No Positive Results     Open Access  
Journal of Responsible Technology     Open Access  
Journal of Science (JSc)     Open Access  
Journal of Science and Engineering     Open Access   (Followers: 1)
Journal of Science and Technology     Open Access   (Followers: 2)
Journal of Science and Technology     Open Access   (Followers: 1)
Journal of Science and Technology (Ghana)     Open Access   (Followers: 3)
Journal of Science and Technology Policy Management     Hybrid Journal   (Followers: 1)
Journal of Science Foundation     Open Access   (Followers: 1)
Journal of Science of the University of Kelaniya Sri Lanka     Open Access  
Journal of Scientific Research     Open Access   (Followers: 1)
Journal of Scientific Research and Reports     Open Access   (Followers: 1)
Journal of Scientometric Research     Open Access   (Followers: 22)
Journal of Shanghai Jiaotong University (Science)     Hybrid Journal  
Journal of Social Science Research     Open Access   (Followers: 2)
Journal of Taibah University for Science     Open Access  
Journal of the Asiatic Society of Bangladesh, Science     Open Access  
Journal of the Ghana Science Association     Full-text available via subscription   (Followers: 3)
Journal of the History of Ideas     Full-text available via subscription   (Followers: 166)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Journal of the National Science Foundation of Sri Lanka     Open Access  
Journal of the Royal Society of New Zealand     Hybrid Journal   (Followers: 49)
Journal of the South Carolina Academy of Science     Open Access  
Journal of Unsolved Questions     Open Access  
Jurnal Ilmiah Ilmu Terapan Universitas Jambi : JIITUJ     Open Access  
Jurnal Matematika, Sains, Dan Teknologi     Open Access  

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Arabian Journal for Science and Engineering
Journal Prestige (SJR): 0.303
Citation Impact (citeScore): 1
Number of Followers: 1  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2193-567X - ISSN (Online) 2191-4281
Published by Springer-Verlag Homepage  [2468 journals]
  • Optimisation of a Cascade Refrigeration System with Natural Refrigerants,
           Based on Nature-Inspired Algorithms

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      Abstract: Abstract Refrigeration at low temperatures is an important requirement for long storage duration where compression cascade systems can offer very efficient and eco-friendly solution opportunities in the context of the current environmental preoccupations, by using innocuous refrigerants pairs as working fluids. In the present work, energy- and exergy-based modelling is performed for fluid pairs of natural refrigerants with low or no GWP and ODP effects. R744/R717, R744/R290, R744/R600, R744/R600a, R744/R1270 pairs are considered, where the low-temperature loop (LT) is filled with carbon dioxide, while the high-temperature loop (HT) employs either ammonia, propane, butane, isobutene or propylene. Optimised system performance is assessed for the effect of temperature variations in the evaporator–condenser. To this aim, several optimisation methods are evaluated to best determine the evaporation temperature in the HT loop that maximises the system’s COP. With the suitable optimising method selected, optimal operating conditions are successively computed for each refrigerant pair, and the resulting performances are determined for condensation and evaporation temperatures in the respective ranges of 25–50 °C and − 55 to − 30 °C. It can be observed that for these conditions, the highest optimised performances are achieved with the R744/R1270 and R744/R717 pairs.
      PubDate: 2024-02-23
       
  • A New Voltage Compensation and State of Charge-Assisted Power Sharing
           Strategy for DC Microgrids

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      Abstract: Abstract Direct current (DC) microgrid has recently gained potential interest since it supports easy integration of distributed generators (DGs) and energy storage devices (ESDs). However, most DGs and ESDs are integrated into the DC bus with the power electronic converter/inverter. Thus, controlling large-scale power electronic-based generators, loads, and ESDs becomes a challenging task. This paper introduces a new control strategy for the DC microgrid to regulate the bus voltage and power sharing among the DGs, ESDs, resistive loads, and constant power loads (CPLs). Each battery’s state of charge (SoC) is utilized in the double control loop to determine the charging/discharging speed. Besides, an additional fractional-order proportional-integral voltage compensation loop is introduced to regulate the DC bus voltage. The SoC-based inner loops assist in the automatic balancing of battery charges, while the compensation loop minimizes the DC bus voltage deviation. A detailed small-signal model is derived to design the controller parameter. The optimization approach is applied to the developed model with the objective of reducing the integral square error of the step response. The DC microgrid system with the designed controller is tested with the simulation study. The results depict that the bus voltage deviation is reduced by 63.27% while the SoC balancing is faster for both charging and discharging modes.
      PubDate: 2024-02-23
       
  • Adsorption of Flue Gas on Carbonate and Sandstone Rocks at Typical
           Reservoir Conditions: Influence of Feed Composition

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      Abstract: Abstract Flue gas generated by power plants is considered one of the primary sources of CO2 emissions. Flue gas can be injected into depleted gas reservoirs to minimize the impact of CO2 and other pollutants such as sulfur dioxide (SO2) and nitrogen oxides (NOx). This work investigates the impact of gas impurities in flue gas on CO2 enhanced gas recovery in sandstone and carbonate reservoirs. Sorption analysis was conducted using flue gas with and without gas impurities on carbonate and sandstone rock samples at a temperature range between 50 and 100 °C and pressure up to 45 bar. The results showed that low clay content sandstone has the highest adsorption (17.3 mg/g) of purified flue gas (80%N2/20%CO2) compared to about 13 mg/g for clay-rich sandstone at a temperature of 50 °C and a pressure of 45 bar, which is believed to be a result of pore filling mechanism besides the van der Waals forces between the gas molecules and rock surface. Indiana limestone with low permeability revealed about 11 mg/g at similar conditions. The total gas uptake decreased by an average of 56% in sandstone rocks and 31% in limestone by injecting the flue gas that contained SO2 and NOx, which could be attributed to the higher affinity of these gas impurities to rock surface compared to CO2 and N2. The adsorption/desorption hysteresis in sandstone and carbonate rocks showed that the adsorption is physisorption in all cases. Increasing the temperature decreased the flue gas adsorption without any effect on its nature.
      PubDate: 2024-02-23
       
  • The Photocatalytic Performance of Ag /TiO2/Nylon 6/PMMA System

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      Abstract: Abstract Herein, Ag/TiO2/Nylon 6/PMMA catalyst system was developed, and its photocatalytic properties were fully analyzed. XRD, SEM, EDS, and PL analyses were carried out to get information on crystal structure, micromorphology, elemental composition, and band gap energy. Photocatalytic degradation was followed by UV–vis spectrophotometry. The band gap of the catalyst was found to be between 2.51 and 3.1 eV. Up to 80% degradation was achieved under UV light irradiation. No bulk adsorption was observed, which means that the reaction was completely carried by the photocatalytic process. pH 3 value was determined to be suitable for a high rate. Reaction kinetic was determined to be matched with the first-order rate law. The newly developed polymer blend matrix system here may have broad application prospects in the remediation of water resources.
      PubDate: 2024-02-23
       
  • Transport Phenomena Study of Low-Prandtl-Number Fluid Flow Using Thermal
           Lattice Boltzmann Technique

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      Abstract: Abstract The impetus of this paper is to examine the natural convection of low-Prandtl-number fluid flow driven by buoyancy force in a differentially heated enclosure using the single-relaxation-time thermal lattice Boltzmann method owing to the broad range of applications of convective-based problems in industry, such as melting processes as well as energy storage systems. In this study, a proper force term incorporated in the collision operator has been utilized for computer code convergence (especially for Prandtl numbers less than 0.71). The side walls of the geometry are maintained by constant temperatures, Th and Tc, and the upper and lower walls are thermally insulated. The effects of Prandtl ( \(0.05\le {\text{Pr}}\le 0.71\) ) and Rayleigh numbers ( \({10}^{4}\le {\text{Ra}}\le {5\times 10}^{5}\) ) on the temperature fields, streamline functions, and average Nusselt number have been studied and found that at a given Prandtl number, the magnitude of vortices at the corner of the enclosure rises while those could disappear by Prandtl number increase. In addition, in the vicinity of hot and cold walls, the isotherms concentration increases due to rising temperature gradient and Prandtl number. The heat transfer coefficient grows with an increase in Ra and Pr numbers, experiencing a dramatic rise of 66.67% at the hot wall for Pr = 0.1. Similarly, the maximum velocity values near the cold wall rose by 185.71%. The suggested scheme has been validated by results shown in the literature, and excellent agreement has been found.
      PubDate: 2024-02-22
       
  • A Novel Hybrid RERNN-SCSO Technique-based Unified Power Quality
           Conditioner of Microgrid in an EV Charging Station

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      Abstract: Abstract According to recent power quality studies, voltage sags and voltage unbalance in medium-voltage and low-voltage distribution grids are the most common type of power quality problems. Power quality is an essential concern in the modern power system that can affect consumers and utility. In modern age, with an increase in sensitive and expensive electronic equipment, power quality is essential for the power system’s reliable and safe operation. This paper proposes a hybrid technique-based unified power quality conditioner (UPQC) of microgrid in an EV charging station (EVCS), and it is the combination of recalling-enhanced recurrent neural network (RERNN) and sand cat swarm optimization (SCSO), together called as RERNN-SCSO. The SCSO creates the converter control signal, and the RERNN method forecasts the control signal from SCSO method. The proposed technique consists of series-active power filter (Se-APF), shunt-active power filter (Sh-APF), and DC-side capacitor as the parts of proposed technique. The major purpose of RERNN-SCSO technique is used to increase the power quality. Many loads, like highly inductive NLL, nonlinear loads (NLL) as well as unbalanced NLL (UNLL), are all linked at the point of common coupling (PCC). When the major structure of UPQC is built into the EVCS, an additional alternating current (AC)/DC converter will help with initialization. At this, the charging position provides charging service to the EVs as well as discharges the EVs into the power grid. The novelty of the proposed work consists in connecting EVs in parallel to the UPQC DC-side using double-layer microgrid (MC) and DC–DC converter. The proposed method ensures EV charging while efficiently handling quality of power issues like harmonic current, voltage disturbance, voltage sag and swell and voltage unbalance. RERNN-SCSO method performance is performed on the MATLAB/Simulink software to analyze the working performances and related with present techniques. RERNN-SCSO method-based THD under voltage sag condition as 2.03% and swell as 2.01%, which is lower than the existing methods.
      PubDate: 2024-02-22
       
  • Detection and Mitigation of Denial of Service Attacks in Internet of
           Things Networks

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      Abstract: Abstract The increasing number of sensors and Internet of Things (IoT) devices have made the Denial of Service (DoS) attacks in IoT networks a significant security threat. The inherent characteristics of IoT networks such as the large number of end nodes, the heterogeneous nature of IoT networks, resource limitations in routers, and the multiplicity of application areas in daily life, make the investigation of attacks in these networks a major and important research problem. This paper presents a new approach for detecting and mitigating DoS attacks in IoT networks. The proposed approach is implemented on an Field Programmable Gate Array (FPGA)-based platform and tested for performance against different types of DoS attacks. The approach can respond quickly to attacks specific to IoT networks and can be easily implemented on hardware with low resource requirements.
      PubDate: 2024-02-22
       
  • A Multi-start Variable Neighbourhood Search with a New Solution
           Construction Method for Solving Inter-Domain Path Computation Problem

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      Abstract: Abstract Inter-Domain Path Computation under Node-Defined Domain Uniqueness Constraint (IDPC-NDU) is one of the routing cost optimization problems in multi-domain networks that has been proposed and received much attention by researchers. Because the IDPC-NDU is NP-Hard, the approaches using approximation algorithms are frequently used. These approximation algorithms often construct solutions based on connecting edges between adjacent domains, with little consideration of edges between non-adjacent domains. Furthermore, this study investigates how to combine an algorithm with the capability of exploration with another algorithm with the capability of exploiting in order to balance the ability to explore and exploit the search space. As a result, based on new encoding and decoding solution methods, this study proposes combinations of the algorithms Multi-start Method and Variable Neighbourhood Search Method. By considering the inter-domain edges connecting non-adjacent domains, the new encoding and decoding methods help to examine more possible paths between the source node and the destination node. The proposed algorithm is evaluated by comparing it to the most recent algorithms that were proposed to solve the IDPC-NDU. Analysis of experimental results on various instances shows that the proposed algorithm exceeds other algorithms in most of the experimental cases. In particular, one-fifth of the test cases on which the proposed algorithm finds the optimal solution. Besides, the study also analyses the influence of the attributes of the input data on the efficiency of the proposed algorithm.
      PubDate: 2024-02-22
       
  • Strength, Permeability and Multiscale Pore Characteristics of Cement-Based
           Materials with High-Volume Fly Ash Contents and Different Water-Binder
           Ratios

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      Abstract: Abstract Fly ash (FA) contents and water-binder ratio (w/b) are the important factors influencing the mechanical characteristics of cement-based materials, meanwhile the porous structure of material plays a vital role. The compressive strength and water permeability of cement-based samples with high-volume FA contents (0%, 30%, 40%) and different w/b (0.3, 0.4, 0.5) were measured. The results demonstrated that higher FA contents or greater w/b led to lower compressive strength and higher water permeability at an early stage. The pore structure features of samples were obtained using mercury intrusion porosimetry and low-temperature nitrogen gas adsorption (LT-NGA). The pore size distributions (PSDs) and the matrix compressibility in cementitious materials were also analyzed, with the compression coefficient KC ranging from 11.919 to 1.249 × 10−4 MPa−1. Increasing the FA content and reducing the w/b resulted in an optimized pore structure of the samples, characterized by changing the main pore type from mesopores (10–50 nm) to micropores (< 10 nm). The pores and fractures in the samples also had distinct multifractal characteristics. The strongest negative correlation between the compressive strength and the width of the multifractal generalized spectrum was proved by Pearson correlation analysis, and the correlation coefficient (ρ) was − 0.93. Furthermore, the water permeability had the strongest positive correlation with porosity, with ρ of 0.91. The content of macropores (50–10 μm) had greater influence on its macroscopic properties. The dense structure accompanied by homogeneous PSDs is advantageous for enhancing the strength and anti-permeability properties of cement-based materials.
      PubDate: 2024-02-21
       
  • Enhancing the Hydrophobicity and Surface Roughness of Synthesized PVDF
           Membrane Using Evaporation and Non-solvent-Induced Phase Separation

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      Abstract: Abstract This study focuses on the synthesis of a PVDF membrane using DMAc as the solvent through a combination of evaporation-induced phase separation (EIPS) and non solvent-induced phase separation (NIPS) techniques. The experimental findings underscore the significant role of thermodynamic and kinetic parameters in the phase inversion process, influencing the surface and transport properties of the resulting membrane. By precisely controlling the combined processes of EIPS and NIPS, a customized membrane with specific characteristics such as a rough surface (roughness of up to 725.9 µm) and hydrophobicity (water contact angle up to 117°) was successfully achieved. The synthesized membrane exhibits good membrane properties (total porosity ≥ 50%, mean pore size ranging from 0.01 to 0.35 μm) with well-connected pores. To assess its quality, the membranes permeate flux, reaching up to 12.8 kgh−1 m−2, and salt rejection rate of 99.8% were evaluated using Vacuum Membrane Distillation (VMD). Furthermore, a fouling study was conducted to investigate the impact of operating time on membrane performance, revealing a negligible decline in membrane fouling over a 200-h run.
      PubDate: 2024-02-21
       
  • Narrator2Vec: An Efficient Narrator Representation in Hadith Literature
           Using Word Embedding

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      Abstract: Abstract Our proposed method, Narrator2Vec, uses a novel approach to examine the narrators involved in transmitting Islamic hadith. This method utilizes a distributed representation of narrators through word embedding, by training a 100-dimensional vector representation based uniquely on the names of hadith narrators found in over 650,000 hadiths. These vectors can effectively capture the relatedness and internal structure among narrators’ names, such as identifying the different names of the same narrator and predicting missing or unknown narrators in incomplete transmission chains. Additionally, Narrator2Vec can be used to detect patterns and relationships within the transmission chains of hadith, providing valuable insights into the historical context and evolution of these important religious texts. Furthermore, it can be applied to other historical texts and research fields, where the identification of key actors and their relationships are important. The ability to quickly and efficiently analyze large amounts of hadith data through Narrator2Vec can greatly enhance the accuracy and speed of hadith studies, making it a valuable tool for scholars and researchers in the field.
      PubDate: 2024-02-20
       
  • Synthesis and Application of an Eco-Friendly Cellulose Diacrylate-Carbon
           Nanocomposite: A Highly Effective Inhibitor for Clay Swelling in
           Water-Based Drilling Fluids

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      Abstract: Abstract The wellbore vulnerability while drilling triggered by the swelling of the shale formations could lead to significant non-productive time and high costs to overcome. In our present study, acrylic acid-functionalized cellulose diacrylate-carbon nanocomposite (AA-Cellulose-NC) was synthesized in-house for application as a clay swelling inhibitor. The characteristics of the AA-Cellulose-NC were evaluated by scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The inhibition potential was assessed by employing linear swelling. The drilling mud’s performance was also examined by means of rheological studies and fluid loss assessment. It was noticed that the decrease in linear swelling of bentonite clay (Na-Ben) was dependent on the concentration of AA-Cellulose-NC; for instance, 0.2%, 0.5%, and 1.0% AA-Cellulose-NC decreased the linear swelling by 37%, 47%, and 57%, respectively, as compared to water. With the addition of 1.0% AA-Cellulose-NC, the fluid loss declined from 10.0 to 7.4 mL. The zeta potential increased in negative value from −27.3 to −41.4 mV that confirms the formation of stable dispersion of nanocomposite with bentonite clay. The very high capillary suction time approves the strong swelling inhibition performance of nanocomposite. The light scattering technique confirmed the slow settling rate and prolonged suspension of AA-Cellulose-NC in water that is indication of better drilling fluid performance. Consequently, it can be deduced that AA-Cellulose-NC is a robust contender that might assist as an environment-friendly shale inhibitor for water-based drilling muds.
      PubDate: 2024-02-20
       
  • Dynamic Analysis of a Multi-span Pipe Conveying Fluid Using Wavelet Based
           Finite Element Method

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      Abstract: Abstract A wavelet based finite element method (WBFEM) using B-spline wavelet on the interval is developed in this paper for modeling multi-span pipes conveying fluid with different support conditions. The pipe element is considered as a beam element which is formulated based on Euler–Bernoulli and Timoshenko beam theories. The generalized eigenvalue problem is formulated and solved to obtain the modal characteristics of the multi-span pipe. In comparison to the conventional finite element method, the developed WBFEM discretization scheme uses appreciably less elements for modeling the multi-span pipe. Numerical solutions are obtained and compared with some available results in the literature and those obtained by ANSYS to verify the accuracy and efficiency of the developed method.
      PubDate: 2024-02-20
       
  • Geometric Optimization of SLM-Printed AlSi10Mg Radial Heat Sinks: A
           Numerical and Experimental Approach for Natural Convection Conditions

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      Abstract: Abstract The current study explores the thermal performance and geometric optimization of radial heat sinks manufactured through selective laser melting process of AlSi10Mg material, primarily intended for cooling applications in light-emitting diodes (LEDs). Few studies have systematically approached the geometric optimization of radial heat sink designs, particularly considering variable fin heights (both fin outer and fin inner height), in conjunction with other geometric parameters like fin length, fin thickness, and the number of fins tested across a broad spectrum of heat flux values. Through comprehensive experimentation and numerical simulations, the independent and combined impact of these considered key geometric parameters was investigated on the heat sink performance. The experimental design, guided by Response Surface Methodology, encompasses a wide range of heat flux levels, varying from 300 to 1800 W/m2, to ensure the broad applicability of the findings. The results underscore the significance of fin thickness, which notably influences the base temperature of the heat sink, particularly at higher heat flux levels. The interaction between heat flux and fin length also plays a pivotal role in base temperature control, with additional fins contributing to lower temperatures. Furthermore, it was revealed that higher fin outer heights, combined with lower fin inner heights, lead to superior heat sink performance, aligning with practical LED cooling requirements. The optimization process results in configurations that consistently maintain base temperatures below the critical 70 °C threshold, thus contributing to effective thermal management in LED devices.
      PubDate: 2024-02-20
       
  • Performance of Carbon Nanotube on Nickel-Plated Copper Substrate Using
           Electrophoretic Deposition Process for Electronic Cooling Application:
           Response Surface Method Optimization

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      Abstract: Abstract Thermal interface materials (TIMs) have emerged as a potential material for heat dissipation in the cooling system due to their good materials in heat transfer and help protect devices from damage. The main challenge of TIMs is the lower thermal conductivity of materials and poor surface contact, resulting in high internal thermal resistance. Therefore, carbon nanotubes (CNTs) are the best candidate due to their good thermal conductivity. However, the method for deposition of CNTs on the substrate involves high operating temperature and produces unwanted impurities. This study introduces electrophoretic deposition due to the convenient process with operation at room temperature, fast deposition time, simple equipment setup and production of fewer impurities. Pristine CNTs were deposited on the nickel-plated copper substrate using a direct current. The deposition yield can be varied by the variation of CNT-solvent concentration (< 1.0 mg CNT/ml) and applied voltage. The interaction between parameters of electrophoretic deposition (EPD) was optimized using Design of Experiment (DOE) software through the response surface method (RSM) to have maximum deposition of CNTs. Field emission scanning electron microscopy (SEM) was performed to analyze the surface morphology of the deposition and observe the maximum thickness of 56.95 µm with 11.0 mg of CNTs deposited on nickel substrate when operated under 175 V applied voltage, 10 min deposition time for 0.50 mg/ml concentration.
      PubDate: 2024-02-19
       
  • Exploring Microstructural, Textural, and Mechanical Properties in
           Bulk-Area Stir Zone Fabrication Through Overlapping Friction Stir
           Processing with Water Cooling

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      Abstract: Abstract In this study, a bulk-area stirring zone (BSZ) was generated within the Al–Mg–Si alloy using friction stir processing with a combination of pin overlapping and water cooling. Detailed examinations were conducted on various aspects, including microstructural evolution, intermetallic behavior, crystallographic texture, and mechanical properties. The bulk-area stir zone (BSZ) microstructure contains an equiaxed fine-grained structure with more fraction of high-angle grain boundaries due to intense plastic straining and dynamic recrystallization. The grain refinement remained consistent across each overlapping pass, typically within the range of 3 to 4 µm. Notably, the BSZ exhibited the formation of A1-{111}(112) texture components with a maximum intensity of 5.4 owing to the material flow caused by the tool’s revoluting nature around the pin. The hardness distribution across the BSZ was found to be uniform and aligned with the grain size values. The combined effects of material softening and intermetallic dissolution in the BSZ led to a substantial enhancement of 127% in ductility.
      PubDate: 2024-02-19
       
  • Stabilization of Expansive Clays with Basalt Fibers and Prediction of
           Strength by Machine Learning

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      Abstract: Abstract Expansive clays with high plasticity need to be stabilized to prevent hazards that may arise due to the extreme volume changes experienced with moisture fluctuations. Utilizing a kind of natural and eco-friendly sustainable fiber named as basalt fiber into the soils has become a new issue that needs to be expanded in scope. In this paper, a high plastic soil was stabilized by these natural basalt fibers to reduce possible soil-induced disasters. Basalt fibers in different lengths were mixed into the clay at varied amounts. Due to the soil’s sensitivity to water, the samples were prepared at distinct water contents, 2 on the dry and 3 on the wet side of the optimum. To question whether the strength loss due to the moisture change can be regained with basalt fibers or not, the strength tests were performed on both natural and stabilized samples. Through the tests, it was revealed that the strength of the expansive clays can be enhanced up to 280% at a fiber content of 2%. The highest strength was obtained at approximately 880 kPa by mixing 24 mm fibers with 15% water at 1 and 2% ratios. As anticipated, the long fibers (24 mm) supplied a real reinforcement even at high water contents. In addition, the obtained data set was used to train machine learning algorithms (linear, ridge, lasso, support vector, decision tree) that have just started to be applied in geotechnical engineering. Results have proved that, the decision tree regression outperformed the stress and strain with 0.85 R-squared (R2) in stress and 0.91 R2 in strain estimation. Additionally, it was revealed from the feature importance analyses that water content has an importance of approximately 85% on stress and up to 97% on strain.
      PubDate: 2024-02-19
       
  • Path-Loss Model for Wireless Sensor Networks in Air Pollution Environments
           Leveraging of Drones

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      Abstract: Abstract Recently, interest in wireless sensor networks (WSNs) and applications has grown significantly. The path loss caused by buildings and tall trees is a major obstacle in the distribution of sensor nodes. Because of absorption, dispersion, and attenuation by the structures or trees, a degradation occurs in the reliability of the communication link. In this paper, four path-loss models (PLMs) were developed for a LoRa (long-range) wireless sensor node mounted on the drone as a part of a WSN for monitoring air pollution over a distance of approximately 1,000 m utilising the received signal strength indicator (RSSI). Four novel PLMs were created using MATLAB’s curve-fitting tools, employing polynomial (POLY), exponential (EXP), Gaussian, and power equations. To improve the accuracy of these equations, their coefficients were fine-tuned using the particle swarm optimisation (PSO) algorithm, resulting in the development of hybrid algorithms—EXP-PSO, POLY-PSO, Gaussian-PSO, and power-PSO. The results demonstrated that PSO-enhanced PLMs achieved an outstanding correlation coefficient (R2) value of 1, indicating their exceptional ability to represent PLMs accurately in the tested air population environment utilising WSNs. Notably, the POLY-PSO algorithm outperformed other algorithms, achieving the lowest root-mean-square error (RMSE) of 1.945 × 10−4 and sum of squares error (SSE) of 1.853 × 10−26. The PLMs based on hybridisation algorithms outperformed existing PLMs regarding the correlation coefficient. These findings hold significant implications for designing and optimising WSNs in air pollution applications, offering valuable insights into radio path-loss modelling in this area.
      PubDate: 2024-02-19
       
  • Superconductivity for Nuclear Fusion: Past, Present, and Future

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      Abstract: Abstract Within fusion research and development, there are three main categories of fusion devices: magnetic confinement fusion, inertial confinement fusion, and magneto-inertial confinement. The focus on achieving power production has historically centered around magnetic confinement fusion, employing devices such as tokamaks, stellarators, and spheromaks. The plasma confinement in these machines relies on powerful magnetic fields generated from large, complex electromagnetic systems containing superconducting coils. Superconductivity, or the flow of current without resistance at low temperatures, allows the electromagnets to fulfill the demanding requirements of fusion devices. Analyzing the history of superconducting magnets in the application of fusion energy production provides necessary insight into the current state of the technology and allows for identification of current and future trends in research and development. Throughout its history, fusion research has experienced cyclic periods of depression followed by renewed interest. Breakthroughs in superconducting technologies have played a part in stimulating these periods of renaissance, cementing its role as an enabling technology for fusion. Future trends in research aim to address several challenges in using superconducting magnets in fusion devices, including manufacturing difficulties, irradiation and long-term availability, quench detection and protection, and finally the high cost of the materials and cryogenic cooling. The resolution of these issues is crucial for advancing fusion devices toward practical energy production.
      PubDate: 2024-02-18
       
  • Prevention of Casing Heading in Gas Lift Under Uncertainty Using the
           Square Root Unscented Kalman Filter for State and Parameter Estimation

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      Abstract: Abstract Gas lift is one of the most common artificial lift methods used to enhance oil well production. Oscillations in production flow rate, known as casing heading instability, are a common issue in gas lift systems. Designing an automatic control system is a recommended solution to prevent casing heading and improve the performance of a gas lift system. One of the major challenges in designing such a control system is the uncertainty of the system parameters and state variables. In this paper, the analytical gas lift model presented in previous studies was modified to account for the real gas flow in the annulus. Then, a parameter estimator and a state observer were designed using a square root Kalman filter to estimate the uncertain parameter and state variables. The simulation results have shown that the improved model is more reliable. The designed Linear Quadratic Gaussian (LQG) control, along with the estimator and observer, can stabilize the gas lift system under uncertain conditions. The main contribution of this work is the development of an integrated system for controlling and estimating the gas lift system. This system ensures reliable performance even in the presence of changes in wellbore and reservoir conditions.
      PubDate: 2024-02-17
       
 
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  Subjects -> SCIENCES: COMPREHENSIVE WORKS (Total: 374 journals)
Showing 1 - 200 of 265 Journals sorted alphabetically
AAS Open Research     Open Access   (Followers: 1)
Accountability in Research: Policies and Quality Assurance     Hybrid Journal   (Followers: 19)
Acta Materialia Transilvanica     Open Access  
Acta Nova     Open Access   (Followers: 2)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
Acta Scientifica Naturalis     Open Access   (Followers: 4)
Adıyaman University Journal of Science     Open Access  
Advanced Science     Open Access   (Followers: 15)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Research     Open Access  
Advances in Science and Technology     Full-text available via subscription   (Followers: 18)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 7)
Afrique Science : Revue Internationale des Sciences et Technologie     Open Access   (Followers: 1)
AFRREV STECH : An International Journal of Science and Technology     Open Access   (Followers: 3)
Alfarama Journal of Basic & Applied Sciences     Open Access   (Followers: 12)
American Academic & Scholarly Research Journal     Open Access   (Followers: 4)
American Journal of Applied Sciences     Open Access   (Followers: 22)
American Journal of Humanities and Social Sciences     Open Access   (Followers: 14)
ANALES de la Universidad Central del Ecuador     Open Access   (Followers: 1)
Anales del Instituto de la Patagonia     Open Access  
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 2)
Apuntes de Ciencia & Sociedad     Open Access  
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 1)
Archives Internationales d'Histoire des Sciences     Partially Free   (Followers: 5)
Archives of Current Research International     Open Access  
ARO. The Scientific Journal of Koya University     Open Access  
ARPHA Conference Abstracts     Open Access   (Followers: 1)
ARPHA Proceedings     Open Access  
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access  
Asian Journal of Advanced Research and Reports     Open Access  
Asian Journal of Scientific Research     Open Access   (Followers: 2)
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 5)
Australian Field Ornithology     Full-text available via subscription   (Followers: 1)
Australian Journal of Social Issues     Hybrid Journal   (Followers: 6)
Avrasya Terim Dergisi     Open Access  
Bangladesh Journal of Scientific Research     Open Access  
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 1)
Berichte Zur Wissenschaftsgeschichte     Hybrid Journal   (Followers: 11)
BIBECHANA     Open Access  
Bilge International Journal of Science and Technology Research     Open Access  
Bioethics Research Notes     Full-text available via subscription   (Followers: 15)
BJHS Themes     Open Access   (Followers: 2)
Black Sea Journal of Engineering and Science     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of the National Research Centre     Open Access  
Butlletí de la Institució Catalana d'Història Natural     Open Access  
Chain Reaction     Full-text available via subscription  
Ciencia Amazónica (Iquitos)     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia Ergo Sum     Open Access  
Ciência ET Praxis     Open Access  
Ciencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Citizen Science : Theory and Practice     Open Access   (Followers: 3)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Applied Sciences     Open Access  
Comunicata Scientiae     Open Access  
ConCiencia     Open Access  
Conference Papers in Science     Open Access  
Configurations     Full-text available via subscription   (Followers: 11)
COSMOS     Hybrid Journal   (Followers: 1)
Crea Ciencia Revista Científica     Open Access  
Cuadernos de Investigación UNED     Open Access  
Current Issues in Criminal Justice     Hybrid Journal   (Followers: 15)
Current Research in Geoscience     Open Access   (Followers: 6)
Dalat University Journal of Science     Open Access  
Data     Open Access   (Followers: 4)
Data Curation Profiles Directory     Open Access   (Followers: 9)
Dhaka University Journal of Science     Open Access  
Diálogos Interdisciplinares     Open Access  
Digithum     Open Access   (Followers: 2)
Discover Sustainability     Open Access   (Followers: 5)
Einstein (São Paulo)     Open Access  
Ekaia : EHUko Zientzia eta Teknologia aldizkaria     Open Access  
Elkawnie : Journal of Islamic Science and Technology     Open Access  
Emergent Scientist     Open Access  
Enhancing Learning in the Social Sciences     Open Access   (Followers: 7)
Enseñanza de las Ciencias : Revista de Investigación y Experiencias Didácticas     Open Access  
Entramado     Open Access  
Entre Ciencia e Ingeniería     Open Access  
Epiphany     Open Access   (Followers: 1)
Estação Científica (UNIFAP)     Open Access  
Ethiopian Journal of Education and Sciences     Open Access   (Followers: 5)
Ethiopian Journal of Science and Technology     Open Access  
Ethiopian Journal of Sciences and Sustainable Development     Open Access  
European Online Journal of Natural and Social Sciences     Open Access   (Followers: 4)
European Scientific Journal     Open Access   (Followers: 7)
Evidência - Ciência e Biotecnologia - Interdisciplinar     Open Access  
Exchanges : the Warwick Research Journal     Open Access   (Followers: 1)
Experimental Results     Open Access   (Followers: 1)
Facets     Open Access  
Fides et Ratio : Revista de Difusión Cultural y Científica     Open Access  
Fırat University Turkish Journal of Science & Technology     Open Access  
Fontanus     Open Access   (Followers: 1)
Forensic Science Policy & Management: An International Journal     Hybrid Journal   (Followers: 242)
Frontiers for Young Minds     Open Access  
Frontiers in Climate     Open Access   (Followers: 5)
Frontiers in Science     Open Access   (Followers: 1)
Fundamental Research     Open Access  
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
Gaudium Sciendi     Open Access  
Gazi University Journal of Science     Open Access  
Ghana Studies     Full-text available via subscription   (Followers: 15)
Global Journal of Pure and Applied Sciences     Full-text available via subscription  
Global Journal of Science Frontier Research     Open Access   (Followers: 1)
Globe, The     Full-text available via subscription   (Followers: 4)
HardwareX     Open Access  
Heidelberger Jahrbücher Online     Open Access  
Heliyon     Open Access   (Followers: 1)
Himalayan Journal of Science and Technology     Open Access  
History of Science and Technology     Open Access   (Followers: 5)
Hoosier Science Teacher     Open Access  
Impact     Open Access   (Followers: 1)
Indian Journal of History of Science     Hybrid Journal   (Followers: 2)
Indonesian Journal of Fundamental Sciences     Open Access  
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 2)
Indonesian Journal of Science and Technology     Open Access  
Ingenieria y Ciencia     Open Access   (Followers: 1)
Innovare : Revista de ciencia y tecnología     Open Access  
Instruments     Open Access  
Integrated Research Advances     Open Access  
Interciencia     Open Access  
Interface Focus     Full-text available via subscription  
International Annals of Science     Open Access  
International Archives of Science and Technology     Open Access  
International Journal of Academic Research in Business, Arts & Science     Open Access  
International Journal of Advanced Multidisciplinary Research and Review     Open Access  
International Journal of Applied Science     Open Access  
International Journal of Basic and Applied Sciences     Open Access   (Followers: 1)
International Journal of Computational and Experimental Science and Engineering (IJCESEN)     Open Access  
International Journal of Culture and Modernity     Open Access   (Followers: 5)
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Engineering, Technology and Natural Sciences     Open Access  
International Journal of Innovation and Applied Studies     Open Access   (Followers: 4)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
International Journal of Network Science     Hybrid Journal   (Followers: 3)
International Journal of Recent Contributions from Engineering, Science & IT     Open Access  
International Journal of Research in Science     Open Access   (Followers: 1)
International Journal of Social Sciences and Management     Open Access   (Followers: 2)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 10)
International Letters of Social and Humanistic Sciences     Open Access  
International Science and Technology Journal of Namibia     Open Access   (Followers: 1)
International Scientific and Vocational Studies Journal     Open Access  
InterSciencePlace     Open Access  
Investiga : TEC     Open Access  
Investigación Joven     Open Access  
Investigacion y Ciencia     Open Access   (Followers: 1)
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
iScience     Open Access   (Followers: 2)
Issues in Science & Technology     Free   (Followers: 8)
Ithaca : Viaggio nella Scienza     Open Access  
J : Multidisciplinary Scientific Journal     Open Access  
Jaunujų mokslininkų darbai     Open Access   (Followers: 2)
Journal de la Recherche Scientifique de l'Universite de Lome     Full-text available via subscription  
Journal of Chromatography & Separation Techniques     Open Access   (Followers: 9)
Journal of Advanced Research     Open Access   (Followers: 2)
Journal of Al-Qadisiyah for Pure Science     Open Access  
Journal of Alasmarya University     Open Access   (Followers: 2)
Journal of Analytical Science & Technology     Open Access   (Followers: 5)
Journal of Applied Science and Technology     Full-text available via subscription   (Followers: 1)
Journal of Applied Sciences and Environmental Management     Open Access   (Followers: 1)
Journal of Big History     Open Access   (Followers: 4)
Journal of Composites Science     Open Access   (Followers: 4)
Journal of Diversity Management     Open Access   (Followers: 4)
Journal of Indian Council of Philosophical Research     Hybrid Journal  
Journal of Institute of Science and Technology     Open Access  
Journal of Integrated Science and Technology     Open Access  
Journal of King Saud University - Science     Open Access  
Journal of Mathematical and Fundamental Sciences     Open Access  
Journal of Natural Sciences Research     Open Access   (Followers: 2)
Journal of Negative and No Positive Results     Open Access  
Journal of Responsible Technology     Open Access  
Journal of Science (JSc)     Open Access  
Journal of Science and Engineering     Open Access   (Followers: 1)
Journal of Science and Technology     Open Access   (Followers: 2)
Journal of Science and Technology     Open Access   (Followers: 1)
Journal of Science and Technology (Ghana)     Open Access   (Followers: 3)
Journal of Science and Technology Policy Management     Hybrid Journal   (Followers: 1)
Journal of Science Foundation     Open Access   (Followers: 1)
Journal of Science of the University of Kelaniya Sri Lanka     Open Access  
Journal of Scientific Research     Open Access   (Followers: 1)
Journal of Scientific Research and Reports     Open Access   (Followers: 1)
Journal of Scientometric Research     Open Access   (Followers: 22)
Journal of Shanghai Jiaotong University (Science)     Hybrid Journal  
Journal of Social Science Research     Open Access   (Followers: 2)
Journal of Taibah University for Science     Open Access  
Journal of the Asiatic Society of Bangladesh, Science     Open Access  
Journal of the Ghana Science Association     Full-text available via subscription   (Followers: 3)
Journal of the History of Ideas     Full-text available via subscription   (Followers: 166)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Journal of the National Science Foundation of Sri Lanka     Open Access  
Journal of the Royal Society of New Zealand     Hybrid Journal   (Followers: 49)
Journal of the South Carolina Academy of Science     Open Access  
Journal of Unsolved Questions     Open Access  
Jurnal Ilmiah Ilmu Terapan Universitas Jambi : JIITUJ     Open Access  
Jurnal Matematika, Sains, Dan Teknologi     Open Access  

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