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  Subjects -> ENGINEERING (Total: 1957 journals)
    - CHEMICAL ENGINEERING (150 journals)
    - CIVIL ENGINEERING (146 journals)
    - ELECTRICAL ENGINEERING (84 journals)
    - ENGINEERING (1124 journals)
    - ENGINEERING MECHANICS AND MATERIALS (284 journals)
    - HYDRAULIC ENGINEERING (43 journals)
    - INDUSTRIAL ENGINEERING (53 journals)
    - MECHANICAL ENGINEERING (73 journals)

ENGINEERING (1124 journals)            First | 1 2 3 4 5 6 7 8 | Last

Developments in Geotechnical Engineering     Full-text available via subscription   (1 follower)
Developments in Mineral Processing     Full-text available via subscription  
Diálogos Interdisciplinares     Open Access  
Diamond Light Source Proceedings     Full-text available via subscription  
Digital Signal Processing     Hybrid Journal   (3 followers)
Discrete Optimization     Full-text available via subscription   (4 followers)
Doct-Us Journal     Open Access  
Documents pour l'histoire des techniques     Open Access   (1 follower)
Dyes and Pigments     Hybrid Journal   (3 followers)
Dyna     Open Access  
Dynamical Systems: An International Journal     Hybrid Journal   (1 follower)
El Hombre y la Máquina     Open Access  
Electromagnetics     Hybrid Journal   (2 followers)
Electrophoresis     Hybrid Journal   (5 followers)
Elsevier Geo-Engineering Book Series     Full-text available via subscription   (2 followers)
Elsevier Ocean Engineering Series     Full-text available via subscription  
Embedded Systems Letters, IEEE     Hybrid Journal   (14 followers)
Energies     Open Access   (1 follower)
Energy and Power Engineering     Open Access   (6 followers)
Energy Conversion and Management     Hybrid Journal   (6 followers)
Energy Engineering     Full-text available via subscription   (8 followers)
Energy for Sustainable Development     Hybrid Journal   (8 followers)
Energy Procedia     Open Access   (2 followers)
Energy Science & Engineering     Open Access   (2 followers)
Energy Science and Technology     Open Access   (9 followers)
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects     Hybrid Journal   (2 followers)
Energy Sources, Part B: Economics, Planning, and Policy     Hybrid Journal   (5 followers)
Energy Systems     Hybrid Journal   (7 followers)
ENGEVISTA     Open Access  
ENGI : Revista Electrónica de la Facultad de Ingenieria     Open Access  
Engineer : Journal of the Institution of Engineers, Sri Lanka     Open Access  
Engineering     Open Access   (2 followers)
Engineering & Technology     Hybrid Journal   (15 followers)
Engineering Analysis with Boundary Elements     Hybrid Journal   (1 follower)
Engineering Computations     Hybrid Journal   (4 followers)
Engineering Economics     Open Access   (4 followers)
Engineering Economist, The     Hybrid Journal   (3 followers)
Engineering Education     Open Access  
Engineering Failure Analysis     Hybrid Journal   (21 followers)
Engineering Geology     Hybrid Journal   (8 followers)
Engineering Journal     Open Access   (1 follower)
Engineering Management Journal     Hybrid Journal   (12 followers)
Engineering Management Research     Open Access   (4 followers)
Engineering Management Reviews     Open Access   (1 follower)
Engineering Optimization     Hybrid Journal   (5 followers)
Engineering Sciences     Open Access  
Engineering Studies     Hybrid Journal  
Engineering With Computers     Hybrid Journal   (5 followers)
Engineering, Technology & Applied Science Research     Open Access  
Entramado     Open Access  
Entropy     Open Access   (3 followers)
Environmental & Engineering Geoscience     Full-text available via subscription   (2 followers)
Environmental and Ecological Statistics     Hybrid Journal   (5 followers)
Environmetrics     Hybrid Journal  
Épités - Épitészettudomány     Full-text available via subscription   (1 follower)
EPJ Photovoltaics     Open Access  
Ergonomics in Design: The Quarterly of Human Factors Applications     Hybrid Journal   (5 followers)
ESAIM: Control Optimisation and Calculus of Variations     Full-text available via subscription  
ESAIM: Mathematical Modelling and Numerical Analysis     Full-text available via subscription   (3 followers)
ESAIM: Proceedings     Open Access  
Estuaries and Coasts     Hybrid Journal   (1 follower)
EURASIP Journal on Advances in Signal Processing     Open Access   (3 followers)
European Journal of Combinatorics     Full-text available via subscription  
European Journal of Engineering Education     Hybrid Journal   (1 follower)
European Journal of Lipid Science and Technology     Hybrid Journal   (1 follower)
European Journal of Mass Spectrometry     Full-text available via subscription   (9 followers)
European Medical Device Technology     Full-text available via subscription   (2 followers)
European Physical Journal - Applied Physics     Full-text available via subscription   (4 followers)
European Transport Research Review     Open Access   (9 followers)
Evolutionary Intelligence     Hybrid Journal  
Evolving Systems     Hybrid Journal  
Exacta     Open Access  
Experimental Techniques     Hybrid Journal   (15 followers)
Experiments in Fluids     Hybrid Journal   (3 followers)
Fibers and Polymers     Full-text available via subscription   (3 followers)
Filtration & Separation     Full-text available via subscription   (1 follower)
Finite Fields and Their Applications     Full-text available via subscription   (2 followers)
Fire Science Reviews     Open Access   (1 follower)
First Monday     Open Access   (108 followers)
Flexible Services and Manufacturing Journal     Hybrid Journal   (3 followers)
Flow, Turbulence and Combustion     Hybrid Journal   (13 followers)
Fluid Dynamics     Hybrid Journal   (5 followers)
Fluid Dynamics Research     Full-text available via subscription   (7 followers)
Fluid Phase Equilibria     Hybrid Journal   (1 follower)
Focus on Catalysts     Full-text available via subscription  
Focus on Pigments     Full-text available via subscription   (3 followers)
Focus on Powder Coatings     Full-text available via subscription   (2 followers)
Focus on Surfactants     Full-text available via subscription   (3 followers)
Food Engineering Reviews     Hybrid Journal   (2 followers)
Formación Universitaria     Open Access   (3 followers)
FORMakademisk     Open Access  
Formal Methods in System Design     Hybrid Journal   (6 followers)
Forschung     Hybrid Journal  
Forschung im Ingenieurwesen     Hybrid Journal  
Foundations and Trends in Systems and Control     Full-text available via subscription  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (5 followers)
Foundations and Trends® in Electronic Design Automation     Full-text available via subscription  
Foundations of Science     Hybrid Journal  
Frontiers in Aerospace Engineering     Open Access   (2 followers)
Frontiers in Energy     Hybrid Journal   (2 followers)

  First | 1 2 3 4 5 6 7 8 | Last

Engineering Journal    [3 followers]  Follow    
  This is an Open Access Journal Open Access journal
     ISSN (Print) 0125-8281 - ISSN (Online) 0125-8281
     Published by Chulalongkorn University Homepage  [2 journals]   [SJR: 0.153]   [H-I: 3]
  • Hybrid Neural Network Controller Design for a Batch Reactor to Produce
           Methyl Methacrylate
    • Authors: Paisan Kittisupakorn, Thanutchaporn Charoenniyom, Wachira Daosud
      Abstract: Methyl methacrylate (MMA) production in an exothermic batch reactor provides a challenging problem for studying its dynamics behavior and temperature control. This work presents a neural network forward model (NN) to predict a concentration of methyl methacrylate, a jacket temperature and temperature profile in the reactor. An optimal NN model has been employed to predict state variables incorporating into a model predictive control (MPC) algorithm to determine optimal control actions. To control the temperature, neural network based control approaches: a neural network direct inverse control (NNDIC) and a neural network based model predictive control (NNMPC) have been formulated. In addition, a dynamic optimization approach has been applied to find out an optimal operating temperature to achieve maximizing the MMA product at specified final time. Simulation results have indicated that the NNMPC is robust and gives the best control results among the PID and NNDIC in all cases.
      PubDate: 2013-10-15
      Issue No: Vol. 18 (2013)
       
  • Surface Completion Using Laplacian Transform
    • Authors: Pongsagon Vichitvejpaisal, Pizzanu Kanongchaiyos
      Abstract: Model acquisition process usually produce incomplete surfaces due to the technical constrains. This research presents the algorithm to perform surface completion using the available surface’s context. Previous works on surface completions do not handle surfaces with near-regular pattern or irregular patterns well. The main goal of this research is to synthesize surface for hole that will have similar surface’s context or geometric details as the hole’s surrounding. This research uses multi-resolution approach to decompose the model into low-frequency part and high-frequency part. The low-frequency part is filled smoothly. The high-frequency part are transformed it into the Laplacian coordinate and filled using example-based synthesize approach. The algorithm is tested with planar surfaces and curve surfaces with all kind of relief patterns. The results indicate that the holes can be completed with the geometric detail similar to the surrounding surface.
      PubDate: 2013-07-09
      Issue No: Vol. 18 (2013)
       
  • An Investigation on the Human Thermal Comfort from a Glass Window
    • Authors: Nopparat Khamporn, Somsak Chaiyapinunt
      Abstract: The effect of the glass window on the thermal comfort of a person sitting near the glass window is investigated by performing the experiment in a test room. A clear glass window and a tinted glass window are chosen to be the test windows in this study. The index chosen to describe the thermal comfort is the percentage of people dissatisfied (PPD). The important parameter for evaluating the human thermal comfort condition is the mean radiant temperature. The mathematical model for predicting the mean radiant temperature is presented. The predicted mean radiant temperature and the mean radiant temperature evaluated from the operative temperature are compared. The agreement is good. It is found that the mean radiant temperature, the predicted mean vote (PMV) and the PPD are all dependent on the transmitted solar radiation and the surface temperature of the glass window. Higher value of the mean radiant temperature yields higher value of the PMV and the PPD. The room with a clear glass window installed has high thermal discomfort condition mainly from the solar radiation. The amount of the thermal discomfort is directly varied with the amount of the transmitted solar radiation. For a high transmittance glass window, the thermal discomfort due to solar radiation is greater than the thermal discomfort due to surface temperature. For a low transmittance (high absorptance) glass window, the thermal discomfort due to surface temperature becomes important when compared to the thermal discomfort in the part of solar radiation.
      PubDate: 2013-07-09
      Issue No: Vol. 18 (2013)
       
  • Synthesis and Characterization of a Phosphonated Graft Copolyimide
    • Authors: Nathinee Srinate, Supakanok Thongyai, Piyasan Praserthdam, Robert A Weiss
      Abstract: A new synthesis route of phosphonated multiblock, branched copolyimide is proposed in this research. The synthesis and characterization of the series of new phosphonated graft copolyimides were prepared by combination of one-step high temperature polymerization and phosphonation method by lithiation and reaction with excess diethylchlorophosphate. The phosphonate ester product was converted to the phosphonic acid by hydrolysis. A branched polyimide structure was achieved by coupling the two polyimides with 3, 3’-diaminobenzidine. A phosphonated branched copolyimide with 32 % mol phosphonation exhibited high thermal stability, with a decomposition temperature in nitrogen of ~475°C. Proton exchange membranes prepared from these copolyimides had proton conductivity of 0.02 – 0.03 S/cm at 100% humidity over a temperature range of 40 – 100°C.
      PubDate: 2013-06-13
      Issue No: Vol. 18 (2013)
       
  • Characterizations of Poly(vinyl chloride)/Acrylonitrile Styrene Acrylate
           Blends for Outdoor Applications
    • Authors: Sarawut Rimdusit, Patima Wongmanit, Siriporn Damrongsakkul, Duangporn Saramas, Chanchira Jubsilp, Isala Dueramae
      Abstract: Significant enhancement on impact property of poly(vinyl chloride)/acrylonitrile styrene acrylate (PVC/ASA) blends was observed. The effect of ASA content on mechanical characteristics, including impact strength, themomechanical properties, water absorption, and outdoor weathering durability were investigated. The results suggested that the impact strength of the PVC/ASA blends increased drastically at the ASA content of about 30-40 wt% and at the ASA content of 50 wt%, the significant high impact strength of up to 77.6 kJ/m2 was obtained. The modulus and strength under tensile and flexural loads of PVC/ASA blends were found to increase with the PVC fraction while glass transition temperature and heat deflection temperature systematically increased with increasing ASA content. The blends are partially miscible in nature as evidenced from the shift of the two glass transition temperatures towards each other in the dynamic mechanical analysis. In addition, ASA fraction in the blends provides improved resistance to UV radiation for the PVC/ASA blend sample under natural weathering. The obtained PVC/ASA blends clearly showed a potential use as high impact plastic products for outdoor application.
      PubDate: 2013-06-13
      Issue No: Vol. 18 (2013)
       
  • Interpolation-based Off-line Robust MPC for Uncertain Polytopic
           Discrete-time Systems
    • Authors: Pornchai Bumroongsri, Soorathep Kheawhom
      Abstract: In this paper, interpolation-based off-line robust MPC for uncertain polytopic discrete-time systems is presented. Instead of solving an on-line optimization problem at each sampling time to find a state feedback gain, a sequence of state feedback gains is pre-computed off-line in order to reduce the on-line computational time. At each sampling time, the real-time state feedback gain is calculated by linear interpolation between the pre-computed state feedback gains. Three interpolation techniques are proposed. In the first technique, the smallest ellipsoids containing the measured state are approximated and the corresponding real-time state feedback gain is calculated. In the second technique, the pre-computed state feedback gains are interpolated in order to get the largest possible real-time state feedback gain while robust stability is still guaranteed. In the last technique, the real-time state feedback gain is calculated by minimizing the violation of the constraints of the adjacent inner ellipsoids so the real-time state feedback gain calculated has to regulate the state from the current ellipsoids to the adjacent inner ellipsoids as fast as possible. As compared to on-line robust MPC, the proposed techniques can significantly reduce on-line computational time while the same level of control performance is still ensured.
      PubDate: 2013-06-13
      Issue No: Vol. 18 (2013)
       
  • Performance Evaluation of Alkali Activated Fly Ash Lightweight Aggregates
    • Authors: Gomathi Perumal, Anandan Sivakumar
      Abstract: The potential use of fly-ash obtained from thermal power plant for producing artificial lightweight aggregate has been systematically investigated in this study. Use of processed artificial aggregates from industrial wastes instead of natural aggregates can significantly reduce the cost of concrete production. Flyash has been used in concrete either as supplementary cementitious material or as fine aggregate substitution. This study deals with the use of flyash as aggregate by means of artificial production using pelletization process. The influence of alkali activator on the production and strength enhancement was studied. Also, the properties of alkali- activated aggregate using various binder materials such as cement, bentonite, metakaolin and blast furnace slag were studied. Moreover, the study emphasizes the efficient production of cold-bonded fly-ash aggregate using cement, bentonite, furnace slag and metakaolin. Mechanical strength properties of various fly-ash aggregate were tested for crushing strength and impact strength. The investigation results suggested that the cold-bonded fly-ash lightweight aggregate using slag showed a highest crushing strength of 22.81 MPa and also exhibited lower water absorption of 13.01%. The influence of binary blends of flyash and a binder was observed to be an important parameter for achieving a high strength aggregate.
      PubDate: 2013-06-03
      Issue No: Vol. 18 (2013)
       
  • Reliability Analysis of Link Stability in Secured Routing Protocols for
           MANETs
    • Authors: Menaka Sivakumar, M. K. Jayanthi
      Abstract: The prime characteristics of Mobile Ad Hoc Network (MANET) are infrastructure free, absence of centralized authority and dynamic nature of nodes which are more vulnerable to security attacks. Reliability and security are prime issues to protect information and nodes in a network during communication which has received more research interest in designing a dynamic secured routing scheme. QoS is set of service requirement that needs to be satisfied by the network during the data transmission in the network. From the perception of QoS best effort protocols ensure optimum network operation in a unpredictable mobile environment. The multimedia applications are intolerable towards delay and reliability which are the features of mobile network, hence the potentials of MANET were not utilized in multimedia applications. These issues of delay and reliability of packet transmission in MANET are contributed by stability of the communication link even during the mobility of the nodes Its a necessity to analyze the performance of various secured routing protocols based on the stability of the communication link in case of mobility of nodes during data transfer. This paper is focused on a comparative study of various secured reactive routing protocols in MANET signifying the connectivity stability during the mobility of the nodes.
      PubDate: 2013-05-14
      Issue No: Vol. 18 (2013)
       
  • Public Transportation Improvement Validation Model for Metropolitan City
           Karachi
    • Authors: Zubair Iqbal Rao, Kamran Khan, Syed Faraz Jafri, Khawaja Sheeraz
      Abstract: Any metropolitan city is identified by its effective operational transportation modes. In between that, public transportation plays vital role for getting the proper scale of the economy and in all aspects. Lesser the rate of vehicle ownership increases the improvement rate in public transport system. But the system should be linked with the effective controlled strategy that resembles with the meaningful and user friendly environment. Choice of mode of transport is selected by the road user which in turn dependent on the facilities provided in the passenger cars. Unfortunately the system of public transportation is diversified due to number of reasons. This not only predominates the Enforcement action but transforms the Engineering measures as well. According to the survey, more than 80% road users are the direct passengers of Buses and Mini buses. Not only that, they are forced to use more than two vehicles during the whole day for their complete trip accommodation. Apart from that, users are not satisfied with the existing network due to several reasons. These include improper route network, illegal work imposition, imbalanced fare collection, adverse vehicle condition, lack of Engineering and Enforcement measures etc. This paper focuses on the main legendary actions that need to be adopted by concerned stakeholders for the effective public transportation system. For the sake of reason, a detailed public opinion survey has been done in which number of associated matters is discussed and recommendations are formulated based on the analyzed results in the paper. The thematic idea of the paper also covers the balanced between the improvement in existing condition and bringing the new innovative solutions that are more realistic to the nature of local users of Karachi city.
      PubDate: 2013-05-07
      Issue No: Vol. 18 (2013)
       
  • Separation of PVC from PET/PVC Mixtures Using Flotation by Calcium
           Lignosulfonate Depressant
    • Authors: Somsak Saisinchai
      Abstract: Recycling is an important activity in the minimization of waste that results from human activities. In the United States, 103.2 billion pounds of plastic are produced in 2011. Unfortunately, the majority of this plastic ends up in landfills where its decomposition process can take anywhere from 10 to 30 years. In this work, froth flotation was used to treat PVC (polyvinyl chloride) and PET (polyethylene terephthalate) mixtures. The parameters studied are fed mixtures component ratios, concentration of Calcium Lignosulfonate as wetting reagent and a number of cleaning flotation. The results show a yield of 100% pure PVC separated from PET.
      PubDate: 2013-04-26
      Issue No: Vol. 18 (2013)
       
  • Mathematical Modeling of Induction Period of the Olefins Hydroalumination
           Reaction by Diisobutylaluminiumchloride Catalyzed with
           Cp2ZrCl2
    • Authors: Irek Gubaydullin, Kamila Koledina, Leniza Sayfullina
      Abstract: Method of mathematical modeling of induction period for reaction of olefins hydroalumination by alkylalanes in presence Cp2ZrCl2 was developed. The kinetic model of reaction of olefins hydroalumination by alkylalanes with presence the catalyst Cp2ZrCl2 was built. The values of kinetic parameters of reaction of olefins hydroalumination by alkylalanes in presence Cp2ZrCl2 which describes well an experimental data were determined. Obtained values are allowed to describe an induction period in all experimentally investigated area. The stages of mechanism of reaction of olefins hydroalumination by alkylalanes in presence Cp2ZrCl2 which determine an existence of induction period were found. The software of mathematical modeling of induction period which allows to define stages determined an existence of induction period was developed. It can be used for wide class of investigated reactions.
      PubDate: 2013-04-26
      Issue No: Vol. 18 (2013)
       
  • Synthesis and Testing of Zeolite from Industrial-Waste Coal Fly Ash as
           Sorbent For Water Adsorption from Ethanol Solution
    • Authors: Panu Panitchakarn, Thepparat Klamrassamee, Navadol Laosiripojana, Nawin Viriya-empikul, Prasert Pavasant
      Abstract: In the present work, zeolite was prepared from industrial-waste coal fired ash (CFA) by fusion technique with and without acid-washing pretreatment under various conditions. The synthesized materials were then tested for water adsorption from bioethanol solution with an aim to produce a high purity ethanol (>99.5%) for later utilization in gasohol production manufacturing. From our studies, it was found that the impurities (i.e., Fe2O3, TiO2, MgO, CaO, K2O and SO3) in CFA could be efficiently removed by acid-washing pretreatment. Among three different acids studied (i.e. HCl, HNO3, and H2SO4), HCl exhibited the highest pretreatment performance, while the most suitable pretreatment conditions to enhance high purity raw material (up to 85% purity) were by using 20%HCl with the acid to CFA ratio of 25 mlHCl/gCFA at 80°C for 3 h. After fusion at 550ºC with NaOH/CFA mass ratio of 2.25 and further crystallization at 90ºC for 4 h, the pretreated CFA was converted to zeolite; from which the main phases were sodium aluminum silicate hydrate (1.08Na2O•Al2O3•1.68SiO2•1.8H2O) and faujasite-Na (Na2Al2Si2.4O8.8•6.7H2O). Regarding water adsorption testing, the synthesized zeolite provided comparable adsorption performance with the commercial grade molecular sieve. Under three adsorption cycles testing at 85ºC, high ethanol purity (99.8%) could be achieved without deactivation being observed.
      PubDate: 2013-04-18
      Issue No: Vol. 18 (2013)
       
 
 
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