A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

  First | 1 2        [Sort alphabetically]   [Restore default list]

  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: 6)
Patterns     Open Access   (Followers: 6)
Quantum Science and Technology     Hybrid Journal   (Followers: 5)
Research     Open Access   (Followers: 5)
History of Science and Technology     Open Access   (Followers: 5)
Data     Open Access   (Followers: 4)
Research Policy : X     Open Access   (Followers: 4)
Frontiers in Climate     Open Access   (Followers: 4)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 4)
MUST : Journal of Mathematics Education, Science and Technology     Open Access   (Followers: 4)
People and Nature     Open Access   (Followers: 4)
Journal of the Indian Institute of Science     Hybrid Journal   (Followers: 4)
Journal of Composites Science     Open Access   (Followers: 4)
Journal of Big History     Open Access   (Followers: 3)
Science & Technology Studies     Open Access   (Followers: 3)
Orbis Cógnita : Revista Científica     Open Access   (Followers: 3)
Discover Sustainability     Open Access   (Followers: 3)
International Journal of Culture and Modernity     Open Access   (Followers: 2)
Citizen Science : Theory and Practice     Open Access   (Followers: 2)
Middle European Scientific Bulletin     Open Access   (Followers: 2)
Indonesian Journal of Science and Mathematics Education     Open Access   (Followers: 2)
iScience     Open Access   (Followers: 1)
ARPHA Conference Abstracts     Open Access   (Followers: 1)
Acta Scientifica Malaysia     Open Access   (Followers: 1)
International Journal of Research in Science     Open Access   (Followers: 1)
AAS Open Research     Open Access   (Followers: 1)
Uluslararası Bilimsel Araştırmalar Dergisi (IBAD)     Open Access   (Followers: 1)
Scientonomy : Journal for the Science of Science     Open Access   (Followers: 1)
Jaunujų mokslininkų darbai     Open Access   (Followers: 1)
Revista Saber Digital     Open Access   (Followers: 1)
Revista Vivências em Ensino de Ciências     Open Access   (Followers: 1)
Experimental Results     Open Access   (Followers: 1)
Futures & Foresight Science     Hybrid Journal   (Followers: 1)
International Journal of Innovative Research and Scientific Studies     Open Access   (Followers: 1)
Applied Mathematics and Nonlinear Sciences     Open Access   (Followers: 1)
Impact     Open Access   (Followers: 1)
Journal of Science and Engineering     Open Access   (Followers: 1)
Global Journal of Science Frontier Research     Open Access   (Followers: 1)
Logo STI Science, Technology and Innovation     Open Access   (Followers: 1)
International Science and Technology Journal of Namibia     Open Access   (Followers: 1)
Journal of Science and Technology     Open Access   (Followers: 1)
Alfarama Journal of Basic & Applied Sciences     Open Access  
Fundamental Research     Open Access  
BJHS Themes     Open Access  
South American Sciences     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  
Rafidain Journal of Science     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  
Bilge International Journal of Science and Technology Research     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  

  First | 1 2        [Sort alphabetically]   [Restore default list]

Similar Journals
Journal Cover
Journal of Science and Technology
Number of Followers: 2  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2229-8460
Published by Universiti Tun Hussein Onn Malaysia Homepage  [2 journals]
  • Wind Characteristics and Potentials of Two-Parameter Weibull Distribution
           and Maximum Entropy-Based Distribution Functions at an Equatorial Location
           

    • Authors: Taofeek Otunla, Abasikeme Kenneth Umoren
      Pages: 40 - 51
      Abstract: Thorough knowledge of the wind characteristics and variations are of great importance in the development of wind energy resource in any location. This study examines the wind characteristics and assess the potential of two distribution functions in a low wind equatorial region of West Africa. High resolution wind speed and direction data were obtained from a site in Nsukka, a location chosen in the region of study. Diurnal, seasonal and annual variations of both the wind speed and directions were examined. The potentials of two-parameter Weibull distribution and another distribution function based on Maximum Entropy principle (MEP) were assessed using R2 and root mean squared error (RMSE). The results indicated that day-time is windier than night-time. The transitions months of February, March and April have the highest wind speed. The dry season has greater energy potential than rainy season. The predominant wind direction lay within the sectors: South-South-West and East. The predominant wind sector for February, March and April is South-East. The R2 for daily, sub-seasonal day-time and night-time, monthly, and annual ranged between 0.90 and 0.99 for both MEP-based and Weibull distributions. The daily, sub-seasonal day-time and night-time, monthly, and annual RMSE also ranged between 0.011 to 0.075 for MEP-based and Weibull distribution respectively. Thus, both MEP-based and Weibull two-parameter distribution functions can be used to model wind data at the location of study.
      PubDate: 2023-01-01
      Issue No: Vol. 14, No. 2 (2023)
       
  • Application of Backward Differentiation Formula on Fourth-Order
           Differential Equations

    • Authors: Khadeejah James Audu , Jamiu Garba, Abdgafar Tunde Tiamiyu, Blessing Ashiodime Thomas
      Pages: 52 - 65
      Abstract: Higher order ordinary differential equations are typically encountered in engineering, physical science, biological sciences, and numerous other fields. The analytical solution of the majority of engineering problems involving higher-order ordinary differential equations is not a simple task. Various numerical techniques have been proposed for higher-order initial value problems (IVP), but a higher degree of precision is still required. In this paper, we propose a novel two-step backward differentiation formula in the class of linear multistep schemes with a higher order of accuracy for solving ordinary differential equations of the fourth order. The proposed method was created by combining interpolation and collocation techniques with the use of power series as the basis function at some grid and off-grid locations to generate a hybrid continuous two-step technique. The method's fundamental properties, such as order, zero stability, error constant, consistency, and convergence, were explored, and the analysis showed that it is zero stable, consistent and convergent. The developed method is suitable for numerically integrating linear and nonlinear differential equations of the fourth order. Four Numerical tests are presented to demonstrate the efficiency and accuracy of the proposed scheme in comparison to some existing block methods. Based on what has been observed, the numerical results indicate that the proposed scheme is a superior method for estimating fourth-order problems than the method previously employed, confirming its convergence.
      PubDate: 2023-01-01
      Issue No: Vol. 14, No. 2 (2023)
       
  • Study the Different Concentrations of Hydrochloric and Sulphuric Acid as
           Dopants For Polyaniline

    • Authors: Nur ‘Izqa Ashiqin Mohd Najib, Siti Amira Othman
      Pages: 1 - 7
      Abstract: Conducting polymers have previously been employed in biosensors because they may be used as immobilisation matrices as well as redox systems. Also have numerous uses in medical, pharmacy, environmental monitoring, food and process control. The conductivity of polyaniline-based compositions may be precisely regulated over a broad range. Polyaniline is ease to synthesis, has high conductivity and good performance in biosensor applications. However, polyaniline is not entirely perfect because of its poor solubility in many solvents and low adhesion to different substrate. In this study, hydrochloric acid (HCl) and sulphuric acid (H2SO4) were prepared with different concentration (0.2M, 0.4M, 0.6M, 0.8, 1.0M) for doping process of polyaniline. Fourier-transform Spectroscopy (FTIR), Ultraviolet Spectroscopy (UV-Vis) and Scanning Electron Microscopy (SEM) were used to characterize the properties and morphology of the polyaniline. Four point probe was used to identify the conductivity of the polyaniline sample. FTIR shows a shift peak at benzenoid rings and quioniod rings. Both acids represent that 1.0 M have high absorbance properties. While SEM shows significant different of agglomeration rate for HCl compared to H2SO4. Lastly, the results showed that the conductivity increasing when the concentration of acids increasing. Doping process helps in enhancing the conductivity properties of polyaniline for biosensor application.
      PubDate: 2022-11-10
      Issue No: Vol. 14, No. 2 (2022)
       
  • Characteristics of VHF Line-Of-Sight Propagation for Point-To-Area Network
           in A Tropical Atmosphere

    • Authors: K. C. Igwe
      Pages: 8 - 19
      Abstract: This paper investigates the degree of influence of weather and the environment on radio signal propagation between a Very High Frequency (VHF) band transmitter and a receiver in the North Central region of Nigeria. Signal strength measurements were made from a Frequency Modulation (FM) station broadcasting at 100.5 MHz using a digital signal level meter. The results obtained showed that received signal strength (RSS) values were higher during the wet season with average values ranging between 41 dBµV and 50 dBµV as compared to lower values of between 36 dBµV and 48 dBµV recorded during the dry season. The computed radio refractivity revealed similar trend of low dry season values in the range of 291 N-units to 345 N-units and high wet season values ranging between 350 N-units and 363 N-units. Also, the cumulative frequency distribution of the signal level computed showed that 50 dBµV had the highest number of samples, while 60 dBµV and 70 dBµV recorded the lowest number of samples. In addition, dry season values of attenuation deduced ranged between 1.6 dB and 2.8 dB, while average wet season attenuation values vary from 1.4 dB to 2.3 dB. Finally, the RSS was modeled using ITU-R P.526-12 to predict losses due to diffraction over the earth’s curvature, and the results obtained revealed that the model underestimated the RSS for the radio link.
      PubDate: 2022-11-10
      Issue No: Vol. 14, No. 2 (2022)
       
  • An Interactive Visualization Web Application for Industrial-Focused
           Statistical Process Control Analysis

    • Authors: Dharshini Devi Subramaniam, Soon Chong Johnson Lim
      Pages: 20 - 30
      Abstract: Statistical process control (SPC) implementation plays a major role in quality assurance during the manufacturing process. Nevertheless, the adoption rate of SPC commercial software solutions is unsatisfactory in most Malaysian manufacturing companies due to high software subscription costs and difficulties in applying the software without proper know-how, guidance, and training. This study proposes the development of a purpose-built interactive data visualization web application for rapid SPC analysis in the manufacturing industry using open-sourced software packages. An agile software development model is applied as the software development methodology. In the requirement phase, an interview session was conducted to identify project requirements among stakeholders, i.e. industrial practitioners that are involved with SPC analysis. Based on the feedback and expectations from stakeholders, a design of a web application for SPC analysis that incorporates interactive parameter settings and automated reporting was proposed. The web application was developed using the R programming language and the Shiny package library, and deployed at ShinyApps.io, a web service provider. For evaluation, a usability testing procedure was designed and conducted with five industrial SPC practitioners to determine the usefulness of the web application. The outcome of the usability testing indicated positive results and feedback from evaluators. In conclusion, the developed web-app can assist users, particularly from the manufacturing industry sectors, to perform fast SPC data analytics, visualization, and reporting with ease.
      PubDate: 2022-11-10
      Issue No: Vol. 14, No. 2 (2022)
       
  • Analysis of Soil Nitrate Ion Selective Electrode (ISE) Sensor using
           Arduino UNO

    • Authors: Awang Mohd Ashraffarhan, Mohd Hazimin Mohd Salleh, Nur Shuhada Muhamad Tajudin
      Pages: 31 - 39
      Abstract: The ecological concern over soil and groundwater pollution caused by agricultural activities has led to the growing interest in precision agriculture. One of the most common types of fertilizer is the nitrogen fertilizer which needed in major amount for plant growth. Over fertilization will contaminate soil and groundwater which can have adverse effect on environment and human health. The main purpose of this research is to measure soil nitrate concentration using nitrate ion-selective electrode (ISE) sensor and Arduino programmable microcontroller. The optimum soil-to-water ratio and the effect of soil solution clarity will be investigated. Standard sampling procedures was conducted at oil palm plantation area, Felda Bukit Goh, Pahang, Malaysia. Validation of the results were carried out in the laboratory. The recorded data indicated accurate readings for Nitrate ISE Arduino was R² = 0.84. The soil-to-water ratio of 1:2.5 was observed as an optimal proportion ISE analysis. A clear soil solution was crucial for maintaining the accuracy of ISE sensor, to avoid declining of 46.2% accuracy. These results could assist researchers and farmers to accurately monitor the concentrations of soil nitrate on the field effectively as well as an insight to ISE sensor with Arduino technologies.
      PubDate: 2022-11-10
      Issue No: Vol. 14, No. 2 (2022)
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 44.212.99.248
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-