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  Subjects -> ENGINEERING (Total: 2160 journals)
    - CHEMICAL ENGINEERING (186 journals)
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    - ENGINEERING (1165 journals)
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    - MECHANICAL ENGINEERING (81 journals)

ENGINEERING (1165 journals)            First | 1 2 3 4 5 6 7 8 | Last

Data Handling in Science and Technology     Full-text available via subscription   (Followers: 3)
Design Journal     Full-text available via subscription   (Followers: 21)
Designed Monomers and Polymers     Hybrid Journal   (Followers: 2)
Designs, Codes and Cryptography     Hybrid Journal   (Followers: 8)
Developments in Clay Science     Full-text available via subscription  
Developments in Geotechnical Engineering     Full-text available via subscription   (Followers: 1)
Developments in Mineral Processing     Full-text available via subscription   (Followers: 1)
Diálogos Interdisciplinares     Open Access  
Diamond Light Source Proceedings     Full-text available via subscription  
Digital Signal Processing     Hybrid Journal   (Followers: 11)
Discrete Optimization     Full-text available via subscription   (Followers: 5)
Doct-Us Journal     Open Access  
Documents pour l'histoire des techniques     Open Access   (Followers: 1)
Dyes and Pigments     Hybrid Journal   (Followers: 3)
Dyna     Open Access  
Dynamical Systems: An International Journal     Hybrid Journal   (Followers: 1)
E&S Engineering and Science     Open Access  
El Hombre y la Máquina     Open Access  
Electromagnetics     Hybrid Journal   (Followers: 2)
Electrophoresis     Hybrid Journal   (Followers: 5)
Elsevier Geo-Engineering Book Series     Full-text available via subscription   (Followers: 2)
Elsevier Ocean Engineering Series     Full-text available via subscription   (Followers: 1)
Embedded Systems Letters, IEEE     Hybrid Journal   (Followers: 23)
Energies     Open Access   (Followers: 2)
Energy and Power Engineering     Open Access   (Followers: 10)
Energy Conversion and Management     Hybrid Journal   (Followers: 9)
Energy Engineering     Full-text available via subscription   (Followers: 8)
Energy for Sustainable Development     Hybrid Journal   (Followers: 9)
Energy Procedia     Open Access   (Followers: 4)
Energy Science & Engineering     Open Access   (Followers: 4)
Energy Science and Technology     Open Access   (Followers: 12)
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects     Hybrid Journal   (Followers: 2)
Energy Sources, Part B: Economics, Planning, and Policy     Hybrid Journal   (Followers: 6)
Energy Systems     Hybrid Journal   (Followers: 11)
ENGEVISTA     Open Access   (Followers: 1)
ENGI : Revista Electrónica de la Facultad de Ingenieria     Open Access  
Engineer : Journal of the Institution of Engineers, Sri Lanka     Open Access  
Engineering     Open Access   (Followers: 2)
Engineering     Open Access   (Followers: 1)
Engineering & Technology     Hybrid Journal   (Followers: 19)
Engineering Analysis with Boundary Elements     Hybrid Journal   (Followers: 1)
Engineering Computations     Hybrid Journal   (Followers: 3)
Engineering Economics     Open Access   (Followers: 4)
Engineering Economist, The     Hybrid Journal   (Followers: 2)
Engineering Education     Open Access   (Followers: 1)
Engineering Failure Analysis     Hybrid Journal   (Followers: 41)
Engineering Geology     Hybrid Journal   (Followers: 7)
Engineering International     Open Access  
Engineering Journal     Open Access   (Followers: 1)
Engineering Management Journal     Hybrid Journal   (Followers: 13)
Engineering Management Research     Open Access   (Followers: 4)
Engineering Management Reviews     Open Access   (Followers: 1)
Engineering Optimization     Hybrid Journal   (Followers: 8)
Engineering Science and Technology, an International Journal     Open Access  
Engineering Sciences     Open Access  
Engineering Studies     Hybrid Journal  
Engineering With Computers     Hybrid Journal   (Followers: 5)
Engineering, Technology & Applied Science Research     Open Access  
Entramado     Open Access  
Entropy     Open Access   (Followers: 3)
Environmental & Engineering Geoscience     Full-text available via subscription   (Followers: 2)
Environmental and Ecological Statistics     Hybrid Journal   (Followers: 5)
Environmetrics     Hybrid Journal  
Épités - Épitészettudomány     Full-text available via subscription   (Followers: 1)
EPJ Photovoltaics     Open Access   (Followers: 2)
Épsilon     Open Access  
Ergonomics in Design: The Quarterly of Human Factors Applications     Hybrid Journal   (Followers: 10)
ESAIM: Control Optimisation and Calculus of Variations     Full-text available via subscription  
ESAIM: Mathematical Modelling and Numerical Analysis     Full-text available via subscription   (Followers: 2)
ESAIM: Proceedings     Open Access  
Estuaries and Coasts     Hybrid Journal   (Followers: 7)
European Journal of Combinatorics     Full-text available via subscription   (Followers: 3)
European Journal of Engineering Education     Hybrid Journal   (Followers: 2)
European Journal of Lipid Science and Technology     Hybrid Journal   (Followers: 1)
European Journal of Mass Spectrometry     Full-text available via subscription   (Followers: 11)
European Medical Device Technology     Full-text available via subscription   (Followers: 3)
European Physical Journal - Applied Physics     Full-text available via subscription   (Followers: 5)
European Transport Research Review     Open Access   (Followers: 15)
Evolutionary Intelligence     Hybrid Journal  
Evolving Systems     Hybrid Journal   (Followers: 1)
Exacta     Open Access  
Experimental Techniques     Hybrid Journal   (Followers: 46)
Experiments in Fluids     Hybrid Journal   (Followers: 8)
Fibers and Polymers     Full-text available via subscription   (Followers: 3)
Filtration & Separation     Full-text available via subscription   (Followers: 6)
Finite Fields and Their Applications     Full-text available via subscription   (Followers: 3)
Fire Science Reviews     Open Access   (Followers: 3)
First Monday     Open Access   (Followers: 77)
Flexible Services and Manufacturing Journal     Hybrid Journal   (Followers: 1)
Flow, Turbulence and Combustion     Hybrid Journal   (Followers: 19)
Fluid Dynamics     Hybrid Journal   (Followers: 5)
Fluid Dynamics Research     Full-text available via subscription   (Followers: 7)
Fluid Phase Equilibria     Hybrid Journal   (Followers: 3)
Focus on Catalysts     Full-text available via subscription   (Followers: 1)
Focus on Pigments     Full-text available via subscription   (Followers: 3)
Focus on Powder Coatings     Full-text available via subscription   (Followers: 3)
Focus on Surfactants     Full-text available via subscription   (Followers: 4)
Food Engineering Reviews     Hybrid Journal   (Followers: 2)
Food Science and Technology     Open Access   (Followers: 3)
Formación Universitaria     Open Access   (Followers: 4)

  First | 1 2 3 4 5 6 7 8 | Last

Journal Cover   Engineering Journal
  [SJR: 0.269]   [H-I: 16]   [1 followers]  Follow
  This is an Open Access Journal Open Access journal
   ISSN (Print) 0125-8281 - ISSN (Online) 0125-8281
   Published by Chulalongkorn University Homepage  [1 journal]
  • Meshless Method Based on Moving Kriging Interpolation for Solving Simply
           Supported Thin Plate Problems

    • Authors: Supanut Kaewumpai
      Abstract: Meshless method choosing Heaviside function as a test function for solving simply supported thin plates under various loads as well as on regular and irregular domains is presented in this paper. The shape functions using regular and irregular nodal arrangements as well as the order of polynomial basis choice are constructed by moving Kriging interpolation. Alternatively, two-field-variable local weak forms are used in order to decompose the governing equation, biharmonic equation, into a couple of Poisson equations and then impose straightforward boundary conditions. Selected mechanical engineering thin plate problems are considered to examine the applicability and the accuracy of this method. This robust approach gives significantly accurate numerical results, implementing by maximum relative error and root mean square relative error.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • Pharmacognostic Specification and Coumarin Content of Alyxia
    Inner Bark

    • Authors: Kanyarat Peng-ngummuang, Chanida Palanuvej, Nijsiri Ruangrungsi
      Abstract: Alyxia reinwardtii Blume is used in traditional medicine for a long time. This study was carried out to investigate the standardization parameters by qualitative and quantitative analyses as well as coumarin content of A. reinwardtii inner bark. Loss on drying, total ash, acid-insoluble ash, water soluble extractives, ethanol soluble extractives and moisture contents were found to be 8.1 ± 0.2, 7.6 ± 0.1, 1.4 ± 0.1, 16.5 ± 0.1 , 8.9 ± 0.3 and 11.9 ± 0.2% by dry weight, respectively. Coumarin in dichloromethane extract of A. reinwardtii inner bark was analysed by thin layer chromatography (TLC) using silica gel 60 F254 as stationary phase, hexane and ethyl acetate (1 : 1) as mobile phase. The content was evaluated by image analysis using image J software. The regression line of method was polynomial in range of 0.075 - 1.2 mg/spot, and correlation coefficients (R2) were 0.99. The repeatability and intermediate precisions were between 0.5 - 7.1% RSD. The percent recovery was found to be 96.8 - 107.3%. The robustness evaluated by slightly variation in mobile phase ratio was 1.3% RSD. Limit of detection (LOD) and limit of quantitation (LOQ) were 0.05 and 0.16 mg/spot respectively. The coumarin content in A. reinwardtii inner bark crude drug was found to be 0.75 ± 0.01% by dry weight. This study provided pharmacognostic specification toward fundamental standardization of A. reinwardtii inner bark. Additionally, the simple TLC with image analysis can be applied to quantitatively determine coumarin in plant material.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • Effect of Alkaline and Alkaline-Earth Metal Oxides Addition on the Glass
           Formation and Crystallization of

    • Authors: Panitpicha Yaowakulpattana, Takashi Wakasugi, Shinya Kondo, Kohei Kadono
      Abstract: The effect of alkaline and alkaline-earth metal oxides addition to the ZnO-Al2O3-SiO2 system on the glass formation has been studied and the crystallization behaviour of these glasses was investigated by DTA and XRD. The addition of alkaline metal oxides tends to hinder the glass formation and only the system containing Li2O forms glass. The addition of Li2O changes the crystallization behaviour and the precipitation of LiAlSi3O8 is caused together with gahnite which is a typical precipitation phase in the ZnO-Al2O3-SiO2 system. TiO2 added as a nucleating agent tends to form a compound with ZnO when extra ZnO exists. All glasses could be formed when alkaline-earth metal oxides were added and the colour was changed to be brown by the addition of TiO2. In case of no TiO2 addition, glasses changed the form and melted before finish DTA because of low viscosity or high nucleation rate. However, crystallization peaks were clearer after added TiO2 due to the effect of nucleating agent. To conclusion, some glasses could not be formed when alkaline metal oxide was added because crystal growth rate was higher than alkaline-earth metal oxide addition; however, transparent glasses could not be obtained in all samples.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • Comparison of Properties of Fresh and Hardened Concrete Containing Finely
           Ground Glass Powder, Fly Ash, or Silica Fume

    • Authors: Rungrawee Wattanapornprom, Boonchai Stitmannaithum
      Abstract: Waste glass has potential for use in building materials, for example, as an aggregate replacement, a filler in concrete, or a cement replacement. Finely ground glass powder (particle size of less than 38 µm) can be used as a pozzolan material in concrete because of its high reactive silica content. This paper studied the properties of concrete containing finely ground glass powder (approximate particle size, 12–15 µm) of admixture Type D following ASTM C494. The fresh concrete’s compressive strength, ability to resist chloride penetration, and free drying shrinkage were evaluated. The experiment showed that using 10% or 20% glass powder reduced the workability of fresh concrete and accelerated its setting time. However, concrete containing 10% finely ground glass powder exhibited greater compressive strength and improved resistance to the penetration of chloride ions than normal concrete and concrete containing fly ash at the same replacement level. Concrete with 10% glass powder also had lower shrinkage than normal concrete and concrete containing fly ash but higher shrinkage than concrete with 10% silica fume.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • Asymmetric Lanthanum Doped Ceria Membrane with Proton Conductive and
           Hydrogen Separation Capability for Solid Oxide Fuel Cell

    • Authors: Warit Ua-amnueychai, Keishi Asada, Katsunori Hanamura
      Abstract: An asymmetric lanthanum doped ceria (LDC) membrane was prepared by sintering process. The membrane consisted of two layers, dense LDC and porous Ni-LDC layers with a total thickness of approximately 850 μm. According to the XRD pattern, sintering process did not cause any chemical changes to the membrane. The membrane had a crystalline dense LDC layer with a highest hydrogen permeation flux of 1.3 × 10-3 mol∙m-2∙s-1, observed at a hydrogen partial pressure of 65.9 kPa and operating temperature of 800oC. The hydrogen permeation increased as the partial pressure of the hydrogen gas increased. The proton conducting permeation became more dominant as the hydrogen partial pressure decreased. The highest value was observed at 20.3 kPa of hydrogen partial pressure, where 50.6% of the total permeation came from proton conducting ability of the membrane. While, the decreased in the operating temperature decreased the proton conductive permeation flux. With the decrease in the sintering temperature, the amount of pores in the dense LDC layer increased. The LDC membrane with both proton conductivity and hydrogen separation capability shows a promising potential as a hydrogen separation membrane and as a solid electrolyte for the solid oxide fuel cell.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • Ambipolar Organic Field-Effect Transistors Based on Indigo Derivatives

    • Authors: Oratai Pitayatanakul, Iijima Kodai, Tomofumi Kadoya, Ashizawa Minoru, Tadashi Kawamoto, Hidetoshi Matsumoto, Takehiko Mori
      Abstract: In order to improve the ambipolar performance of indigo-based semiconductors, we have investigated halogen-substituted (1 - 4) and phenyl-substituted (5) indigo derivatives at the 5-position. We show that introduction of iodine atoms, namely 5,5’-diiodoindigo (4), leads to the strong halogen-halogen interaction (iodine-iodine interaction) that gives a significant effect on the molecular packing. Thanks to the supramolecular network coming from the extra iodine-iodine interaction, the molecules are arranged approximately perpendicular to the substrate in the thin film. This results in remarkable transistor performance of the maximum hole and electron mobilities (µh/µe) = 0.42/0.85 cm2V–1s–1, which are one of the highest among small-molecule ambipolar organic transistors. Furthermore, introducing phenyl groups, 5 improves the transistor performances up to the maximum mobilities µh/µe = 0.56/0.95 cm2V–1s–1. We have found that the phenyl groups destroy the standard molecular packing of indigo to achieve a unique structure that is a hybrid of the herringbone and brickwork structures.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • Effect of Trace Addition of Ag on the Precipitation Behavior of Al-Mg-Cu

    • Authors: Mami Mihara, Equo Kobayashi, Tatsuo Sato
      Abstract: Effect of Ag addition on the age-hardening response and precipitate microstructure of the Al-3.0Mg-1.0Cu (wt%) alloy has been investigated by micro Vickers hardness and transmission electron microscopy (TEM). The alloy compositions located in the (α+S+T) phase field of the Al-Mg-Cu phase diagram are known to be effective to harden in two stages separated by a distinct and often prolonged hardness plateau. The first stage of hardening occurs very rapidly (e.g. within 60 s at 443 K) and contributes to increase the hardness as much as 50% of the total age-hardening. Trace addition of Ag changes the age hardening response of the Al-3.0Mg-1.0Cu alloy dramatically. In the Ag-added alloy, the hardness change during the first stage of hardening is larger and the plateau stage is shortened as a result of the fast arrival at the second stage of hardness. The microstructure at the plateau stage of hardening for the Al-3.0Mg-1.0Cu alloy exhibits no clear evidence of any precipitates contributing to the first rapid hardening. On the other hand, lath-shaped S phase was observed at the peak hardness. In the Ag-added alloy, fine distributed precipitates were obtained from the beginning of age-hardening.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • Use of Native Promoter-eGFP as a Gene Reporter on Onion Epidermis to
           Analyze Gene Expression of AVR-Pia, an Avirulence
           Effector of Rice Blast Pathogen

    • Authors: Worawan Sornkom, Kozo Asano, Teruo Sone
      Abstract: Rice blast disease, caused by Magnaporthe oryzae, is a major rice disease over the world. Recent studies have identified avirulence effectors from the blast fungus that trigger rice immune against the pathogen invasion after specific interaction with resistance (R) proteins in rice. AVR-Pia is one of avirulence effectors that correspond to Pia-resistant protein, inducing hypersensitive response (HR). Enhanced Green fluorescent protein (eGFP) was used as a reporter of AVR-Pia expression in this study. We synthesized expression vector containing native promoter of AVR-Pia (PRR) fused to eGFP gene. Rice sheath assay was done to observe the fluorescence and the signal was found in appressoria and invasive hypha of M. oryzae, suggesting that AVR-Pia is expressed in appressorium and invasive hyphae after penetration. Although, rice sheath assay is a reliable way to study rice-pathogen interaction, it is a consuming-time method. Onion epidermis was tested to check the availability to use as model system instead of rice sheath. After inoculation M. oryzae containing PPR::eGFP on onion epidermis, fluorescence was observed in appressoria and invasive hypha of transformants similar to observation on rice sheath. Therefore, onion epidermis can be used as plant cell model to study M. oryzae effectors expression by fluorescence observation.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • Mesoporous RF-Xerogels by Facile Hydrothermal Synthesis

    • Authors: Sakhon Ratchahat, Satoshi Kodama, Hidetoshi Sekiguchi, Wiwut Tanthapanichakoon, Khalid Al-Ali, Tawatchai Charinpanitkul, Apinan Soottitantawat, Apiluck Eiad-Ua, Kajornsak Faungnawakij
      Abstract: Mesoporous resorcinol-formaldehyde (RF) xerogels were difficult to obtain by conventional sol-gel polymerization at atmospheric pressure because the resulting tenuous RF-gel structures tended to shrink or collapse during subsequent hot-air drying. To avoid this problem, costly and energy-intensive supercritical drying and freeze-drying are often used. In this work the main goal was to produce high-quality RF xerogels with good mesoporosity and high surface area by employing a hydrothermal process. The hydrogel synthesis was carried out in an autoclave at elevated temperature and pressure in order to sufficiently strengthen its network structure. The initial reactant ratio was held constant to search for most suitable hydrothermal temperature and initial pH. The experimental results showed that the reaction in the autoclave at 140 ºC and initial pH of 6 could successfully produce RF xerogels with good mesoporosity (peaking pore radius rpeak = 2.38 nm), high specific surface area and large pore volume. The hydrothermal process was on the overall relatively simple, low-cost, and less time-consuming compared to the conventional atmospheric method.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
  • A Study on Influential Factors on Building Damage in Kesennuma, Japan from
           the 2011 Great East Japan Tsunami

    • Authors: Natt Leelawat, Anawat Suppasri, Ingrid Charvet, Takayuki Kimura, Daisuke Sugawara, Fumihiko Imamura
      Abstract: A number of buildings were damaged by the 2011 Great East Japan tsunami in the Tohoku area. The research objective is to determine the significant predictor variables of the level of building damage. This paper used detailed data on damaged buildings in Kesennuma City, Japan, collected by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT). The tested explanatory parameters included the inundation depth, number of floors, volume of the building, debris flow, structural material, and function of the building. Through multinomial logistic regression, the results found that the number of floors was significantly associated with the damage level; the inundation depth, structural material (reinforced concrete and masonry), and function of the building (commercial facility, transportation/storage facility, and public facility) were partially associated with the damage level. This study can contribute to academic research by assessing the contribution of different variables to observed damage data by applying statistical analysis, as well as the practical contribution of providing an examination of the predominant factors driving tsunami damage to buildings.
      PubDate: 2015-05-28
      Issue No: Vol. 19 (2015)
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