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  Subjects -> ENGINEERING (Total: 2312 journals)
    - CHEMICAL ENGINEERING (196 journals)
    - CIVIL ENGINEERING (192 journals)
    - ELECTRICAL ENGINEERING (104 journals)
    - ENGINEERING (1213 journals)
    - ENGINEERING MECHANICS AND MATERIALS (389 journals)
    - HYDRAULIC ENGINEERING (55 journals)
    - INDUSTRIAL ENGINEERING (70 journals)
    - MECHANICAL ENGINEERING (93 journals)

ENGINEERING (1213 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 7)
3D Research     Hybrid Journal   (Followers: 19)
AAPG Bulletin     Hybrid Journal   (Followers: 7)
AASRI Procedia     Open Access   (Followers: 14)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 2)
ACS Nano     Full-text available via subscription   (Followers: 260)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 5)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 2)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 11)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 6)
Advanced Science     Open Access   (Followers: 5)
Advanced Science Focus     Free   (Followers: 3)
Advanced Science Letters     Full-text available via subscription   (Followers: 9)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 18)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 2)
Advances in Catalysis     Full-text available via subscription   (Followers: 6)
Advances in Complex Systems     Hybrid Journal   (Followers: 7)
Advances in Engineering Software     Hybrid Journal   (Followers: 27)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 11)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 22)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 27)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 10)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 30)
Advances in Operations Research     Open Access   (Followers: 12)
Advances in OptoElectronics     Open Access   (Followers: 5)
Advances in Physics Theories and Applications     Open Access   (Followers: 12)
Advances in Polymer Science     Hybrid Journal   (Followers: 41)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Remote Sensing     Open Access   (Followers: 41)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 2)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 6)
AIChE Journal     Hybrid Journal   (Followers: 32)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access   (Followers: 1)
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 28)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 11)
American Journal of Engineering Education     Open Access   (Followers: 9)
American Journal of Environmental Engineering     Open Access   (Followers: 17)
American Journal of Industrial and Business Management     Open Access   (Followers: 23)
Analele Universitatii Ovidius Constanta - Seria Chimie     Open Access  
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 2)
Annals of Regional Science     Hybrid Journal   (Followers: 8)
Annals of Science     Hybrid Journal   (Followers: 7)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 18)
Applied Clay Science     Hybrid Journal   (Followers: 5)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 12)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access   (Followers: 1)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 3)
Applied Sciences     Open Access   (Followers: 2)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 5)
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 4)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 8)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 8)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Current Engineering & Maths     Open Access  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 9)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 5)
Batteries     Open Access   (Followers: 6)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 24)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Motor Trade Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 2)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 2)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 4)
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Biofuels Engineering     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 11)
Biomedical Engineering     Hybrid Journal   (Followers: 15)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 14)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 18)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 34)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 9)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomedizinische Technik - Biomedical Engineering     Hybrid Journal  
Biomicrofluidics     Open Access   (Followers: 4)
BioNanoMaterials     Hybrid Journal   (Followers: 2)
Biotechnology Progress     Hybrid Journal   (Followers: 39)
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 10)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 14)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 14)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers, Droit, Sciences et Technologies     Open Access  
Calphad     Hybrid Journal  
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 30)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 44)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 8)
Case Studies in Thermal Engineering     Open Access   (Followers: 4)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 8)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 7)
CEAS Space Journal     Hybrid Journal   (Followers: 2)
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal   (Followers: 1)
CFD Letters     Open Access   (Followers: 6)
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 2)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencias Holguin     Open Access   (Followers: 1)
CienciaUAT     Open Access  
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 24)
Clay Minerals     Full-text available via subscription   (Followers: 10)
Clean Air Journal     Full-text available via subscription   (Followers: 2)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 5)
Coatings     Open Access   (Followers: 4)
Cogent Engineering     Open Access   (Followers: 2)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 2)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 13)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 27)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Composite Structures     Hybrid Journal   (Followers: 274)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 203)
Composites Part B : Engineering     Hybrid Journal   (Followers: 260)
Composites Science and Technology     Hybrid Journal   (Followers: 195)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access  
Computational Geosciences     Hybrid Journal   (Followers: 15)
Computational Optimization and Applications     Hybrid Journal   (Followers: 7)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 8)
Computer Science and Engineering     Open Access   (Followers: 19)
Computers & Geosciences     Hybrid Journal   (Followers: 30)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 7)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 5)
Computers and Geotechnics     Hybrid Journal   (Followers: 11)
Computing and Visualization in Science     Hybrid Journal   (Followers: 6)
Computing in Science & Engineering     Full-text available via subscription   (Followers: 33)
Conciencia Tecnologica     Open Access  
Concurrent Engineering     Hybrid Journal   (Followers: 3)
Continuum Mechanics and Thermodynamics     Hybrid Journal   (Followers: 8)
Control and Dynamic Systems     Full-text available via subscription   (Followers: 9)
Control Engineering Practice     Hybrid Journal   (Followers: 43)
Control Theory and Informatics     Open Access   (Followers: 8)
Corrosion Science     Hybrid Journal   (Followers: 25)
Corrosion Series     Full-text available via subscription   (Followers: 6)
CT&F Ciencia, Tecnologia y Futuro     Open Access   (Followers: 1)

        1 2 3 4 5 6 7 | Last

Journal Cover American Journal of Engineering and Applied Sciences
  [11 followers]  Follow
    
  This is an Open Access Journal Open Access journal
   ISSN (Print) 1941-7020 - ISSN (Online) 1941-7039
   Published by Science Publications Homepage  [31 journals]
  • Poly(3,4-Ethylenedioxythiophene):Poly(4-Styrenesulfonate) Anode for
           ITO-Free Organic Light-Emitting Diodes

    • Abstract: Organic Light-Emitting Diodes (OLEDs) devices using flexible substrates are envisioned for flexible, low-cost and roll-to-roll mass production. However, transparent conductive oxides such as indium tin oxide (ITO) do not fit the requirements of flexible devices, fabricated without vacuum-based technology. Hence, conductive polymer poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) has been proposed as an alternative approach to transparent conductive electrodes. The secondary doping of PEDOT:PSS shows improvement of conductivity to reasonable level and due to lower injection barrier devices with polymer anode exhibit even better performance.
       
  • Stress Analysis of an Artificial Human Elbow Joint: Application of Finite
           Element Analysis

    • Abstract: The elbow joint is frequently affected by two kinds of arthritis (degenerative arthritis and rheumatoid arthritis) following some kind of injuries. There have been efforts since the eighteenth century by various individuals and organizations in modeling permanent implants for the elbow joint, but some of the prostheses have been disappointing because of lack of understanding of the biomechanics of the elbow joint. This paper presents investigation of the stress analysis of the fixation of artificial elbow joint into the humerus bone of the human arm. The Finite Element Analysis (FEA) technique is used to study the stress distribution. The Amira software is used to develop the humerus bone model from a Computed Tomography (CT) data set. Then, the MSC Marc Mentat software is used to create implant and cement-mantle models from geometrical entities. The Magics software is used alongside to achieve appropriate models for the analysis. The maximum principal and von Mises stresses are obtained for varying lengths of the implant at a fixed diameter and with the elbow at an angle of fixation.
       
  • A Simulation Study of Enhanced Distillation Using Ultrasound Waves for the
           Separation of Azeotropic Mixtures

    • Abstract: The potential of ultrasound waves to enhance distillation system for azeotropic mixture is examined through process flowsheeting using Aspen Plus. Since sonication is not a standard feature in the software library, a mathematical model of the proposed distillation system is developed based on first principles in Aspen Custom Modeler and later exported to Aspen Plus environment for process simulation and design studies. Ethyl acetate and ethanol mixture is used as a case study, with a target of producing 99% pure top product from a feed containing 65% ethyl acetate. Sensitivity analyses are carried out to examine the influence of various design and operating variables of the top product’s purity and heat duties. When compared to extractive distillation, the proposed ultrasonic distillation process offers a 14.6% savings of operation costs. The proposed distillation system has also been tested for other azeotropic mixtures with similar success.
       
  • Trend Analysis of Some Indices of Extreme Rainfall Events

    • Abstract: Climate change events results in increased temperature, changing rainfall patterns, floods and droughts. These will not only affect human but also affect how environment responds to the events. In this study, analyses of the trend change of 10 indices of Extreme Rainfall Events were carried in three stations of middle belt of Nigeria namely Jos, Lokoja and Makurdi using the RclimDex software. Daily rainfall data for the 3 stations were collected for the period of 1971 to 2005. The results from analyses of trend change of extreme rainfall indices depicted a sequence of alternating decrease and increase trends in the variables with a varying value due to population and size distribution for the study period. This inevitable climate effect needs to be adapted in order to make life and environment worthwhile.
       
  • NASA Started a Propeller set on Board Voyager 1 After 37 Years of Break

    • Abstract: If you try to start a car that has been in the garage for decades, you expect the engine not to respond. But a set of propellers onboard the NASA Voyager 1 spacecraft was launched on Wednesday, November 29, 37 years after its last use without any problems. Voyager 1 is the only man-made object that has arrived in interstellar space, being also the space probe created by NASA, which travels at the highest speed and is at the highest distance from Terra. The probe flies for 40 years and can change its position to keep its antenna pointing to the Terra using some small propellers operating in very short halves, in the order of milliseconds. NASA's Voyager team has been able to launch a set of back-up propellants that had not been in use since 1980. The test succeeds in extending Voyager 1's life to a minimum of 2-3 years. In 2014, NASA engineers noticed that Voyager's propellers used to change direction degraded. Over time, propellers end up working longer than normal to get the same effect on the direction of the probe. NASA experts have designed several working scenarios to solve the problem and concluded that it is best to use a series of back-up engines to control the probe's direction. These propellants had not been used for 37 years. NASA has been forced to search for decades old archives and use an obsolete programming language that no one uses to compile commands that have been transmitted by radio waves to the small computer on board to Voyager 1. The probe is more than 20 billion km from Terra. In the early years of the mission, Voyager 1 passed past Jupiter, Saturn and some of the satellites of these planets. In order to maintain the correct distance and orientation of on-board instruments, engineers used a series of Trajectory Correction Maneuvers (TCM) with dedicated, but identical size and functionality to those used for small flight corrections. These propellers used to correct the trajectory are placed on the back of the probe. After the encounter with Saturn, Voyager 1 did not need them, the last use being on November 8, 1980. These propellers had been used in a different way, meaning they were operating for long periods, not for very short-lived pulses. All engines on board Voyager were produced by Aerojet Rocketdyne, the same type of engine being installed on other spacecraft such as Cassini and Dawn. On November 28, Voyager engineers started the four TCM engines and tested their ability to steer the probe using 10 millisecond pulses. Researchers were then forced to wait for the test results to travel through space, in the form of radio waves, to be received after 19 h and 35 min by an antenna from Goldstone, California, part of NASA's Deep Space network.
       
  • There is Life on Mars'

    • Abstract: If you can live on Mars, or if there was life on this planet, it's a natural question. The population of our planet has far outstripped the boundaries from which the planet begins to overcrow. Global resources are decreasing, while their consumption is rising more and more. The world's population is growing, it needs housing, food, water, air, clothes, transport, energy and the possibilities offered by our planet are getting smaller. Because we have long been behind the "conquering space" chapter, we are now seriously thinking about limiting the existing resources for the current and future population and those who are looking for extensions on water or in desert areas. In order to conquer the cosmic space with the current technologies, it is necessary a very large financial, sustained financial effort, but unfortunately, it is not at the level of necessity. Under these circumstances, it is natural to wonder whether there is a possibility of living on Mars, which is a subject of particular interest for astrobiology due to the proximity of the planet and its similarities to the Earth. So far, no concrete evidence of past or present life has been found on Mars, but the evidence now shows clearly that during the Noachian Ancient Period, Mars' surface environment had liquid water and could be useful to microorganisms. Surely the existence of living conditions does not necessarily imply the presence of life. ExoMars (Mars Exobiology) is a two-part astrobiology project to look for Martian life proofs, a joint mission of the European Space Agency (ESA) and the Rosice Rosice Space Agency. The first part of the project, launched in 2016, placed a research and communication satellite on Marte's orbit and launched a stationary experimental landing vehicle (which collapsed). The second part of the project is planned for 2020 when a rover will be launched and landed on the surface of Mars, sustaining a scientific mission that is expected to last until 2022 or even later. The major goals of ExoMars programs are to look for previous life signs on Mars, to investigate how martian waters and geochemical environments, atmospheric gas studies and their sources vary. It will search for old biosigns in Martian life, using several elements of spacecraft that will be sent to Mars in two launches. ExoMars Trace Gas Examiners (TGO) and a stationary testator named Schiaparelli were launched on March 14, 2016. TGO entered Mars orbit on October 19, 2016 and will continue to capture methane (CH 4) and other gas pathways present in the Martian Atmosphere that could be a proof of possible biological or geological activity.
       
  • A STING Algorithm and Multi-dimensional Vectors Used for English Sentiment
           Classification in a Distributed System

    • Abstract: Sentiment classification is significant in everyday life, such as in political activities, commodity production and commercial activities. Finding a fast, highly accurate solution to classify emotion has been a challenge for scientists. In this research, we have proposed a new model for Big Data sentiment classification in the parallel network environment - a Cloudera system with Hadoop Map (M) and Hadoop Reduce (R). Our new model has used a Statistical Information Grid Algorithm (STING) with multi-dimensional vector and 2,000,000 English documents of our English training data set for English document-level sentiment classification. Our new model can classify sentiment of millions of English documents based on many English documents in the parallel network environment. However, we tested our new model on our testing data set (including 1,000,000 English reviews, 500,000 positive and 500,000 negative) and achieved 83.92% accuracy.
       
  • English Sentiment Classification using Only the Sentiment Lexicons with a
           JOHNSON Coefficient in a Parallel Network Environment

    • Abstract: Sentiment classification is significant in everyday life, such as in political activities, commodity production and commercial activities. In this survey, we have proposed a new model for Big Data sentiment classification. We use many sentiment lexicons of our basis English Sentiment Dictionary (bESD) to classify 5,000,000 documents including 2,500,000 positive and 2,500,000 negative of our testing data set in English. We do not use any training data set in English. We do not use any one-dimensional vector in both a sequential environment and a distributed network system. We also do not use any multi-dimensional vector in both a sequential system and a parallel network environment. We use a JOHNSON Coefficient (JC) through a Google search engine with AND operator and OR operator to identify many sentiment values of the sentiment lexicons of the bESD in English. One term (a word or a phrase in English) is clustered into either the positive polarity or the negative polarity if this term is very close to either the positive or the negative by using many similarity measures of the JC. It means that this term is very similar to either the positive or the negative. We tested the proposed model in both a sequential environment and a distributed network system. We achieved 87.56% accuracy of the testing data set. The execution time of the model in the parallel network environment is faster than the execution time of the model in the sequential system. Our new model can classify sentiment of millions of English documents based on the sentiment lexicons of the bESD in a parallel network environment. The proposed model is not depending on both any special domain and any training stage. This survey used many similarity coefficients of a data mining field. The results of this work can be widely used in applications and research of the English sentiment classification.
       
  • Remediation of Heavy Metals by using Industrial Waste by Products in Acid
           Mine Drainage

    • Abstract: Acid Mine Drainage (AMD) is one of the main important problems being combated today. Laboratory tank experiments were conducted to evaluate the use of industry waste to adsorb and control the mobilization of metals from contaminated acid mine water. The main physical conditions such as pH and treatment performance are displayed. The solution of acid mine were sampled from the sites and their concentrations of heavy metals were determined. Three types of industrial waste were used as low-cost adsorbent materials in the treatment process which are Ladle Furnace Slag (LFS), Fly Ash (FA) and Biomass Ash (BA). The materials were described by X-Ray Diffraction (XRD), FESEM images and X-Ray Fluorescence (XRF). A comparative study between the removal efficiencies of heavy metals were evaluated. The results showed that about 78 to 99% removal efficiencies of metals were achieved from FA tank, 88 to 99% for LFS tank and 86 to 99% for BA tank. Tank experiment displays huge range of pH changes from acidity to nearly neutral phases when adsorbent was in contact with AMD. Remediation of AMD by using FA showed pH changes from pH 2.12 to 7.09, pH 7.3 for LFS and pH 6.8 for BA within 50 days of operation. From the removal rate, it is found that FA, LFS and BA have different efficiencies of heavy metal removing. The removal of heavy metals by using FA are more efficient to remove Fe, Mn, Cu, Ni and Zn. Meanwhile, LFS sample displayed as an effective adsorbent for treat Pb and Cd in acid mine drainage. The industrial waste used in this study increased and neutralized the pH to control AMD and improve water quality.
       
  • Triton for Nuclear Fusion

    • Abstract: In the nuclear fusion process that is permanently produced in the stars (suns) there is a thermonuclear reaction that uses as the main raw material the very first isotope of hydrogen, namely the Protium. This process is possible due to the huge temperatures and the unimaginably high pressures existing inside a star. At very high temperatures and pressures, matter begins to break even at the nuclear level. The nucleons split off and then reunited to form other types of nuclei. If it was initially thought that temperatures of tens or even hundreds of millions of degrees would be needed, today it is already proven that a minimum needed is about 40 trillion degrees. Such huge temperature is very difficult to be achieved on the Earth right now. For this reason, a compensatory solution would be the production of the nuclear fusion reaction with accelerated particles. For this reason, we want to express a major idea, namely the shift to the next hydrogen isotope, 3H, Tritium, which is much less stable compared to the first two, with its widespread use for the achievement of nuclear-merging energy, here on the Earth. We can’t achieve such temperatures yet, on earth, in safety, but especially to keep them. Only through dangerous bombs they can produce and maintain. Then the only method of achieving nuclear fusion power on the ground remains the use of particle accelerators. For this reason, modern physics power stations must look like or contain a nuclear particle accelerator. Whether we produce the cold or hot fusion reaction, we will need at least one particle accelerator. For a long time, I thought that Tokamak-type installations that have a toroidal shape represent the optimal solution for modern fusion power plants. Today, however, we doubt this, because the achieved tor has a small radius of action (the diameter of the tor is too small). But that is not the main issue that this paper proposes. In this study we want to propose the transition to experimentation of nuclear fusion energy, by exploiting (use) of tritium, namely the triton. The idea is to use triton nuclear fuel. But not the triton resulting from the presence of deuterium, but only pure triton, obtained from other methods than deuterium reactions. We propose, therefore, the elimination of deuterium as fuel and the use of Triton in its place.
       
  • Equilibrium Studies and Optimization of Phosphate Adsorption from
           Synthetic Effluent Using Acid Modified Bio-Sorbent

    • Abstract: Adsorption potential of periwinkle shell (PRW), an agricultural waste, for the removal of phosphate from aqueous solution was investigated through equilibrium studies at various experimental conditions. PRW was carbonized and chemically activated with 1MH2SO4 before it was subjected to characterization using Fourier Transform Infrared (FT-IR), Energy Dispersive X-ray (EDX) and Scanning Electron Microscopy (SEM). Adsorption data were analyzed using various kinetic and isotherm models. Statistical modeling through Central Composite Design (CCD) was also employed. The results showed that, FT-IR spectrum of the activated PRW shows many absorption peaks and a variety of functional groups such as –OH, -NH, C = O, C-H, C-N, CH3 and CH2 which explains its improved adsorption behavior on the colloidal particles. SEM shows the morphological changes with respect to the shape and sizes of the adsorption sites.EDX indicates the higher percentage composition of carbon (11.66%), Oxygen (63.18%) as important constituent elements for adsorption. Equilibrium data were well fitted to pseudo second order kinetic model and were best described by Langmuir Isotherm model at the temperature of 303K. Removal efficiency of 95.90% was obtained. A statistical model equation was developed for the adsorption process which reveals contact time as the most significant main effect for performance of the adsorbent.
       
  • George (Gogu) Constantinescu

    • Abstract: George (Gogu) Constantinescu (October 4, 1891 - December 11, 1965) was a Romanian scientist and engineer, often considered to be one of the most important Romanian engineers. He was responsible for creating a new field of mechanics, called "sonicity," which describes the transmission of energy through vibrations in fluid or solid bodies. He applied the new theory to numerous inventions: sonic, sonic hammer, sonic pomp and others. Among other achievements, there is also a pulling device among the propeller blades regardless of its speed and the first automatic gearshift. He has actively participated in the construction of English aircraft, the Bristol type, while he lived in England. He was the first to use reinforced concrete in the construction of buildings in Romania (among the buildings he built, we can mention: the Patriarchal Palace, the Athénée Palace Hotel and the Great Mosque in Constanta). Gogu Constantinescu was one of those brilliant minds, whose ideas have long outstripped his physical existence, but which today preserves its topicality, surprising by its accuracy, inventiveness and applicability. Gogu Constantinescu's account includes over 317 patents patented in the USA, Denmark, Switzerland, Austria, Germany, Great Britain, France, Romania, etc., as well as others that have never been published. A small calculation shows that since the first invention (1907), until the date of transition to eternity (1965), on average every 4 months a patent was made and if we count only the most prolific years, it results in invention per month. We can say that what Tesla did in electronics, Constantinescu succeeded in mechanics. If Nicolae Tesla invented and transmitted electromagnetic waves (electromagnetic oscillations) through the atmosphere, George Constantinescu invented mechanical sonic oscillations with which he transmitted sonic waves only through continuous media (tubes or pipes, water, oil, various liquids, air, gas, or full bars). Both transmit the waves (produced by oscillations), as well as the energy and power included in these waves, thus managing to transmit energy and power at small, medium, large, even very large distances, controlling and controlling the phenomena and processes from a distance or a large distance.
       
  • Estimating the Scouring Depth of Bridge Pier Using Self-Organizing Neural
           Networks (SOM)

    • Abstract: Scouring is caused as a result of erosion of river bed by water flow and materials carried by water. This research estimates the scouring depth using self-organizing neural network (SOM). The obtained findings were compared with findings of other models. It was found that self- organizing neural network (SOM) has higher correlation coefficient (0.98), compared to other methods. It was also found that root mean square error (RMSE = 0.112) is less than other methods. Estimating the depth of scouring using self-organizing neural network (SOM) method indicated that this method gives better findings, in a way that correlation coefficient in implementing the program with dimensional data is higher value compared to state in which program is implemented with non-dimensional data. In addition, Root Mean Square Error (RSME = 0.09) was seen less in the state of dimensional data. In the current research, using the sensitivity analysis showed that when SOM program is implemented with dimensional data, it will be more sensitive to parameter of average diameter of particles.
       
  • Optimizing an E-Waste Reverse Supply Chain Model while Incorporating Risk
           Costs

    • Abstract: The rapid growth of Electronic Waste (E-waste) in recent years has created serious influences on the environment and society. The highly potential solution to mitigate this issue is the Reverse Supply Chain (RSC) which can reuse and recover E-waste materials. Risks generally derive from a RSC operation such as collection, transportation and treatment risks, but most studies ignore risk effects on the total cost of E-waste treatment in the RSC model. This paper aims to develop a mathematical model for an E-waste RSC considering risk costs. This proposed model applied mixed integer linear programming and solved by a mathematical programming language. An illustrative example is examined to demonstrate the effectiveness of the proposed model. Sensitive analysis is also presented. The results can determine the optimal locations of facilities and the flow of materials or items in a RSC network. Furthermore, the network design decisions have been changed considerably while risk costs are incorporated.
       
  • SFAD2H: Selective Forwarding or Dropping Attack Detection with 2-Hop
           Acknowledgment Support in Wireless Sensor Networks

    • Abstract: Security in wireless sensor networks is critical due to its way of open communication. In this study we have proposed a technique based on a sensor node having alternate path knowledge and 2-hop acknowledgement mechanism to detect adversary nodes which perform selective forwarding and dropping attacks. In selective forwarding attack nodes on the forwarding path refuses to transfer packets selectively. The proposed approach starts with network initialization where every node decides the list of parent nodes through which Sink can be reached with equal distance. Each node chooses a parent node among selected parents to forward the data and establishes pairwise keys with 2-hop parent nodes. During data forwarding, child forwards the packet to 1-hop distance parent, handles acknowledgement from 2-hop distance node and decides the number of packets forwarded and dropped based on successful and unsuccessful transactions. Every node sends a transaction report containing observations on the parent via alternate path to Sink at a particular interval of time called an evaluation period. Sink identifies the malicious node by comparing report received from each node with number of data packets received. Simulated the algorithm in NS-3 and performance analysis compared with other recently proposed approach. Simulation results show that proposed method detects the malicious nodes efficiently and early.
       
  • Management of Renewable Energies and Environmental Protection

    • Abstract: The purpose of this project is to present an overview of renewable energy sources, major technological developments and case studies, accompanied by applicable examples of the use of sources. Renewable energy is the energy that comes from natural resources: The wind, sunlight, rain, sea waves, tides, geothermal heat, regenerated naturally, automatically. Greenhouse gas emissions pose a serious threat to climate change, with potentially disastrous effects on humanity. The use of Renewable Energy Sources (RES) together with improved Energy Efficiency (EE) can contribute to reducing energy consumption, reducing greenhouse gas emissions and, as a consequence, preventing dangerous climate change. At least one-third of global energy must come from different renewable sources by 2050: The wind, solar, geothermal, hydroelectric, tidal, wave, biomass, etc. Oil and natural gas, classical sources of energy, have fluctuating developments on the international market. A second significant aspect is given by the increasingly limited nature of oil resources. It seems that this energy source will be exhausted in about 50 years from the consumption of oil reserves in exploitation or prospecting. "Green" energy is at the fingertips of both economic operators and individuals. In fact, an economic operator can use such a system for both own consumption and energy trading on the domestic energy market. The high cost of deploying these systems is generally depreciated in about 5-10 years, depending on the installed production capacity. The "sustainability" condition is met when projects based on renewable energy have a negative CO2 or at least neutral CO2 over the life cycle. Emissions of Greenhouse Gases (GHG) are one of the environmental criteria included in a sustainability analysis, but is not enough. The concept of sustainability must also include in the assessment various other aspects, such as environmental, cultural, health, but must also integrate economic aspects. Renewable energy generation in a sustainable way is a challenge that requires compliance with national and international regulations. Energy independence can be achieved: - Large scale (for communities); - small-scale (for individual houses, vacation homes or cabins without electrical connection).
       
  • Adaptive Video Quality Model for UHD Video Broadcasting Using the
           Principle of Inclusion

    • Abstract: In this study, an adaptive video quality algorithm is developed for Ultra High Definition (UHD) video broadcasting through Digital Video Broadcasting by Satellite 2nd Generation (DVB-S2), where three conditions are responsible for enhancing or reducing the quality of a video signal received by the DVB-S2 Set-Top-Box (STB). The conditions are: Coverage area, Distance between transmitter and receiver and Separation distance. These conditions are responsible for the required Signal to Noise Ratio (SNR), resultant Bit Error Rate (BER) and the overall capacity of the system. Based on these conditions, received parameters of an HD or UHD video vary; and the quality viewed by the user changes. Therefore, in this study, we have proposed an algorithm based on the future broadcast scenario where the broadcasters will be dealing with simulcasting of multiple video standards of HD and UHD, varying in resolution, frame rate, codec and more. This algorithm is developed using the Principle of Inclusion.
       
  • Comparative Analysis of Skid Resistance for Different Roadway Surface
           Treatments

    • Abstract: Pavement skid resistance impacts road functionality and can affect user safety and vehicle operation costs. This study was an investigation of the effect of sealcoats on skid resistance. Seven different sealcoats-fog seal, chip seal, slurry seal, sand seal, high-friction seal, cape seal, and glass seal-were lab and field tested. Laboratory samples were further tested in the field on pavement sections. To validate lab and field tests, high-friction seal was tested on recently placed pavement sections in Anchorage, Alaska. The British Pendulum tester was used to measure sealcoat skid resistance. A minimum of 40 randomized readings from the lab and field were sorted. Statistical analysis of lab and field data showed insignificant differences between all sealcoat types with the exception of cape seal. The mean skid resistance of sealcoats indicated a preference for high-friction and glass seals. On average, high-friction and glass seals had skid numbers close to 40, providing effective skid resistance as well as safer riding quality. The field and lab data of high-friction sealcoat were validated on recently paved roads in Anchorage. The results highlighted the consistency of skid resistance measurements for the three types of testing conditions (lab, field, and real roadway) for high-friction sealcoat.
       
  • Nikola TESLA

    • Abstract: Nicolae Tesla, has remained and spent most of his life, making it hard to pronounce "Teslea"), is considered to be the inventor of the alternating current and uncovered cableless power transmission. It is attributed to the transmission of energy through monophase, biphasic, polyphase alternating currents and transmission of non-wired energy by electromagnetic waves (oscillations) in the industrial alternating current frequency band (102-109 [Hz]), overlapping band with radio frequencies (the radio band being even more extensive than that of alternative industrial currents). He discovered the spinning magnetic field (simultaneously with the Italian Galileo Ferraris, 1847-1897), Tesla invented both the biphasic and polyphase alternating electric currents and studied the high-frequency current. He built the first two-phase asynchronous motors, the electric generators, the high-frequency electric transformer and so on. In atomic, he researched the atomic nucleus fission, with the help of the high voltage electrostatic generator and was also a pioneer of nuclear power based on nuclear fission reactions. (Einstein was contacted and visited personally by his research in this field). By working permanently in industrial bands, Tesla has inevitably given over radio waves whose frequencies overlap with those of alternating currents. Even though Marconi made the first radio broadcasts over the ocean, a little before Tesla, yet at the basis of his achievements were all the patents and works of Tesla, which Marconi had studied in detail. Tesla is also the first and foremost builder of the world's first and largest radio stations. In 1899, Tesla builds a large 200kw radio station in Colorado, conducts wireless telegraphy transmissions over 1,000km and manages to get 12 million volts of volumes to produce the first artificial lightning (lightning). He drives the first unmanned ship by radio, from a distance to a public demonstration on the ocean, in New York. Transmits concentrated energy through long-distance electromagnetic waves, the energy it uses to power remote consumers or remote control. Tesla deals with natural energy, the production of artificial earthquakes based on huge energies using very low frequency waves (Tesla is the first to accurately determine the resonance frequency of our planet), acceleration of nuclear particles to very high energies and targeting them or microwaves concentrated in beam (deadly rays) capable of reaching and destroying a target at a great distance (airplane, rocket, ship, etc.). He proposes to build a defensive shield to defend America, but even the planet, if needed (the current US defense shield of the Earth is a continuation of his work). It imagines, presents and designs wireless audio-video transmissions (but was too early to implement them massively, technologies were a long way from discovering it; the pieces were then lamps and tubes, there were no chips or integrated circuits, not even transistors).
       
  • Measuring Hydraulic Conductivity Using Geotechnical Centrifuge

    • Abstract: This study investigated the validity of hydraulic conductivity value using Mini Column Infiltration Test. Granitic residual soils from Broga Selangor, Malaysia were tested to obtain the hydraulic conductivity value in relatively shorter time. Soil samples were physically characterized before being tested using Centrifuge Mini Column Infiltration Technique. A normal 1-g Falling Head Permeability Test (Kf) was also being performed as a comparison with hydraulic conductivity value from Centrifuge Test (Kcen). For centrifuge test (Kcen), there were three factors involved; rotation speed, soil thickness and type of solution (single or mixture solution). Hydraulic conductivity value from Centrifuge Test (Kcen) also was highly depending on the Scale Factor Value (SFV). The results from Centrifuge Test showed that the higher rotation speed, the lower SFV would be. Hydraulic conductivity was decreasing with an increasing of rotation speed. The increment of soil thickness also contributed to the decrement of SFV and hydraulic conductivity value. Thus, the hydraulic conductivity value would be more accurate when higher rotation speed and higher soil thickness were applied. Hydraulic conductivity, Kcen for a single solution also showed higher values compared to mixture solutions. However, some of hydraulic conductivity value (Kcen) showed overestimated values due to the presence of cracks in the soil (mudcakes). Most of the scale factors gave low values (x<1.00) which meant x values were close to unity. The value of hydraulic conductivity for 1-g Permeability Test (Kf) was 2.08×10-6 m/s. While for 10mm soil thickness and 2500 RPM (1440 -g) velocity of a single solution, the value of hydraulic conductivity (Kcen) was 6.82×10-4 m/s. Since the scale factor obtained was less than 1 (x = 0.74), the value of Kcen could be used as a valid number to replace the value of Kf from 1-g Permeability Test. This study concluded that by using scale factor, the relationship between HCV from Centrifuge Tests and Falling Head Permeability Tests could be known; thus, Centrifuge modeling could be developed as a valid method in determining the hydraulic conductivity of the soils.
       
  • Interpretation of Double Langmuir Probe I-V Characteristics at Different
           Ionospheric Plasma Temperatures

    • Abstract: Where the plasma potential is fluctuating significantly, Single Langmuir probe method is not relevant to determine the plasma characteristics. This weakness was overcome by the development of the floating double probe. A distortion of the probe characteristics due to varying potential is eliminated, while the whole probe system is floating. This supports probe operation also in discharges with strongly varying potential. Double Langmuir probes provide valuable information on the behavior of space plasmas including ionospheres and the interstellar medium. This research paper focuses on the study of Spherical Double Langmuir Probe I-V characteristics in Maxwellian interstellar plasma. To generate the exact plasma conditions of the experimental testing environments computational procedures is adopted. The investigations address the development of a technique to model Maxwellian plasma. Three different ionospheric plasma temperatures are theoretically taken and its effects on floating potential are studied in this research. The variation of floating potential and ion saturation current due to temperature is clearly depicted. A noticeable trail in the I-V curves is the bump that occurs right after the floating potential. This feature in the transition region affects ability to determine the electron temperature, ion saturation current and plasma potential. Symmetric characteristic when both tips are of equal geometry is an important advantage of the double probe. Generally, all surfaces adjacent to the plasma become contaminated with deposits, so also does any probe. Here I have also deliver some sense of how one might proceed to use these results in the analysis of experimental I-V curves acquired in space.
       
  • Evaluation of Geometric and Environmental Parameters in Reuse of
           Deactivated Railway for LRV Implantation

    • Abstract: A portion of the origin-destination matrix of freight transport in Brazil corresponds to the railway mode; however, a small part of the matrix of passengers is represented by the modalities that use railway lines. The country has an extensive railway network, mainly in the southeast, but some parts are deactivated. This article aims to present a study of the possibility of implementation of a Light Rail Vehicle (LRV) on a stretch that is not in use, since the superstructure has a long useful life and therefore the railroad can be reused for a new use. For this analysis, the geometric parameters of the radius and velocity of the track and the environmental parameters of the domain range, such as the altimetry, amplitude, slope and susceptibility to sliding of the soil according to the Shalstab model, were used.
       
  • Multimode Controller Design for DSTATCOM integrated  with Battery
           Energy Storage for Smart Grid Applications

    • Abstract: A Distribution Static Compensator (DSTATCOM) can provide reactive power support, power factor correction and voltage regulation to a distribution system feeder. In this paper, a multimode multifunctional control algorithm is proposed for the controller of the Voltage Source Converter (VSC) to provide DSTATCOM and load leveling functionalities for smart grid applications through a Battery Energy Storage System (BESS) connected to the grid through the VSC. The designed controller enables the VSC to function in both grid-connected and standalone modes of operation. In grid-connected mode, the VSC provides load leveling, dynamic reactive power exchange and unity power factor functionalities based on consumer's choice. When a fault occurs on the grid, the controller opens the circuit breaker and isolates the load from the grid and then switches to the voltage controller for the standalone mode of operation. The novelty of the proposed controller is, the inverter structure which provides load leveling and DSTATCOM functionalities during grid-connected mode will also serve the load during a grid failure, thereby providing uninterrupted power supply to the load. The simulation results show the ability of the proposed multimode controller to successfully operate the multifunctional DSTATCOM-BESS system in various modes.
       
  • Hysteresis, resonant oscillations and bifurcation mode of a system modeled
           by a forced modified Van der Pol-Duffing oscillator

    • Abstract: Nonlinear oscillations and its applications in physics, chemistry, engineering, biophysics, communications are studied with some analytical, numerical and experimental methods. In the present paper, hysteresis, resonant oscillations and bifurcation mode of a system modeled by a forced modified Van der Pol-Duffing oscillator are considered. The plasma oscillations are considered and are described by a nonlinear differential equation. By using the harmonic balance technique and the multiple time scales methods, the amplitudes of the forced harmonic, superharmonic and subharmonic oscillatory states are obtained. Then, we derived admissible values of the amplitude of the external strength. Some bifurcation structures and transition to chaos of the model have been investigated. The model presented several dynamics motions which are influenced by nonlinear parameters. It can be concluded that the nonlinear parameters have a real impact on the dynamics of the model.
       
  • Development of a Hybrid Power Module for Mobile Wireless Sensor Networks:
           Towards a Livestock Tracking and Identification System

    • Abstract: Smart technology and Internet of Things (IoT) applications have gained popularity in the development of agricultural systems with Wireless Sensor Networks (WSNs) increasingly becoming the building blocks for IoT applications. However, WSNs have a limited power supply. As a result, these systems have a short lifespan, limited memory and low computing power. This paper describes the development of a hybrid power module for WSN to be utilized in a livestock tracking and identification system. Mathematical and MATLAB-Simulink models are developed and used to simulate the characteristics of a lithium ion (Li-ion) battery; to power the mobile sensor node (eartag), a nickel metal hydrate (NimH) battery used to power the static sensor nodes, a solar cell and the hybrid power module. Simulation results show that individually, the power sources provide limited power but the hybrid system coupled with a switching block generates enough power for the system, this implies that the system is viable but a prolonged operation of the system will depend on the battery limitations and climatic conditions. Future work will focus on the development of a prototype that can be tested and validated in real environment.
       
 
 
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