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  Subjects -> ENGINEERING (Total: 2246 journals)
    - CHEMICAL ENGINEERING (187 journals)
    - CIVIL ENGINEERING (178 journals)
    - ELECTRICAL ENGINEERING (100 journals)
    - ENGINEERING (1206 journals)
    - ENGINEERING MECHANICS AND MATERIALS (374 journals)
    - HYDRAULIC ENGINEERING (53 journals)
    - INDUSTRIAL ENGINEERING (61 journals)
    - MECHANICAL ENGINEERING (87 journals)

ENGINEERING (1206 journals)            First | 1 2 3 4 5 6 7 | Last

Showing 401 - 600 of 1205 Journals sorted alphabetically
IET Generation, Transmission & Distribution     Hybrid Journal   (Followers: 2)
IET Image Processing     Hybrid Journal   (Followers: 13)
IET Micro and Nano Letters     Hybrid Journal   (Followers: 5)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 7)
IET Optoelectronics     Hybrid Journal   (Followers: 1)
IET Radar, Sonar & Navigation     Hybrid Journal   (Followers: 18)
IET Renewable Power Generation     Hybrid Journal   (Followers: 9)
IET Science, Measurement & Technology     Hybrid Journal   (Followers: 1)
IET Signal Processing     Hybrid Journal   (Followers: 13)
IETE Journal of Research     Open Access   (Followers: 7)
IETE Technical Review     Open Access   (Followers: 4)
IIE Transactions     Hybrid Journal   (Followers: 2)
IIUM Engineering Journal     Open Access  
Implementation Science     Open Access   (Followers: 12)
Indian Journal of Biotechnology (IJBT)     Open Access   (Followers: 2)
Industrial Data     Open Access  
Industrial Robot An International Journal     Hybrid Journal   (Followers: 3)
Industrie et Technologies     Full-text available via subscription   (Followers: 17)
InfoCiencia     Open Access  
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Ingeniare : Revista Chilena de Ingenieria     Open Access  
Ingenieria     Open Access  
Ingeniería     Open Access  
Ingenieria de Recursos Naturales y del Ambiente     Open Access  
Ingeniería e Investigación     Open Access  
Ingeniería Energética     Open Access  
Ingenieria Industrial. Actualidad y Nuevas Tendencias     Open Access  
Ingeniería Investigación y Desarrollo     Open Access  
Ingeniería solidaria     Open Access  
Ingenieria y Ciencia     Open Access  
Ingeniería y Desarrollo     Open Access  
Ingenieria y Universidad     Open Access  
Ingeniería, Investigación y Tecnología     Open Access  
Ingenio Magno     Open Access  
Ingenius : Revista de Ciencia y Tecnología     Open Access  
Innovare : Revista de ciencia y tecnología     Open Access  
Instrumentation Science & Technology     Hybrid Journal   (Followers: 5)
Integration, the VLSI Journal     Hybrid Journal   (Followers: 4)
Intelligent Control and Automation     Open Access   (Followers: 4)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 5)
Interface Science and Technology     Full-text available via subscription  
Intermetallics     Hybrid Journal   (Followers: 23)
International Archives of Science and Technology     Open Access  
International Communications in Heat and Mass Transfer     Hybrid Journal   (Followers: 6)
International Heat Treatment and Surface Engineering     Hybrid Journal   (Followers: 1)
International Journal for Numerical Methods in Engineering     Hybrid Journal   (Followers: 27)
International Journal for Numerical Methods in Fluids     Hybrid Journal   (Followers: 16)
International Journal for Simulation and Multidisciplinary Design Optimization     Full-text available via subscription  
International Journal for the History of Engineering & Technology     Hybrid Journal   (Followers: 6)
International Journal of Abrasive Technology     Hybrid Journal   (Followers: 2)
International Journal of Adaptive Control and Signal Processing     Hybrid Journal   (Followers: 2)
International Journal of Adhesion and Adhesives     Hybrid Journal   (Followers: 16)
International Journal of Advancements in Technology     Open Access   (Followers: 1)
International Journal of Advances in Applied Sciences     Open Access   (Followers: 1)
International Journal of Advances in Engineering Sciences     Open Access   (Followers: 3)
International Journal of Advances in Engineering Sciences and Applied Mathematics     Hybrid Journal   (Followers: 1)
International Journal of Advances in Engineering, Science and Technology     Open Access   (Followers: 3)
International Journal of Aerodynamics     Hybrid Journal   (Followers: 12)
International Journal of Aerospace Innovations     Full-text available via subscription   (Followers: 12)
International Journal of Air-Conditioning and Refrigeration     Hybrid Journal   (Followers: 4)
International Journal of Antennas and Propagation     Open Access   (Followers: 7)
International Journal of Applied Ceramic Technology     Hybrid Journal   (Followers: 7)
International Journal of Applied Power Engineering     Open Access   (Followers: 4)
International Journal of Architectural Computing     Full-text available via subscription   (Followers: 3)
International Journal of Automation and Control Engineering     Open Access   (Followers: 2)
International Journal of Automotive Technology and Management     Hybrid Journal   (Followers: 5)
International Journal of Autonomic Computing     Hybrid Journal   (Followers: 1)
International Journal of Autonomous and Adaptive Communications Systems     Hybrid Journal   (Followers: 4)
International Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
International Journal of Bifurcation and Chaos     Hybrid Journal   (Followers: 2)
International Journal of Biomedical and Clinical Engineering     Full-text available via subscription   (Followers: 3)
International Journal of Biomedical Imaging     Open Access   (Followers: 5)
International Journal of Biomedical Nanoscience and Nanotechnology     Hybrid Journal   (Followers: 5)
International Journal of Cast Metals Research     Hybrid Journal  
International Journal of Circuit Theory and Applications     Hybrid Journal   (Followers: 2)
International Journal of Coal Science & Technology     Open Access   (Followers: 1)
International Journal of Collaborative Engineering     Hybrid Journal  
International Journal of Combinatorics     Open Access   (Followers: 1)
International Journal of Communication Systems     Hybrid Journal   (Followers: 1)
International Journal of Computer Aided Engineering and Technology     Hybrid Journal  
International Journal of Computer Applications in Technology     Hybrid Journal   (Followers: 3)
International Journal of Control Science and Engineering     Open Access   (Followers: 4)
International Journal of Control, Automation and Systems     Hybrid Journal   (Followers: 10)
International Journal of Corrosion     Open Access   (Followers: 10)
International Journal of Crashworthiness     Hybrid Journal   (Followers: 6)
International Journal of Design Engineering     Hybrid Journal   (Followers: 14)
International Journal of Digital Multimedia Broadcasting     Open Access   (Followers: 4)
International Journal of Education and Management Engineering     Open Access   (Followers: 1)
International Journal of Education Economics and Development     Hybrid Journal   (Followers: 3)
International Journal of Embedded Systems     Hybrid Journal   (Followers: 3)
International Journal of Emerging Multidisciplinary Fluid Sciences     Full-text available via subscription  
International Journal of Energy Optimization and Engineering     Hybrid Journal   (Followers: 3)
International Journal of Engine Research     Hybrid Journal   (Followers: 1)
International Journal of Engineering & Technology     Open Access   (Followers: 4)
International Journal of Engineering and Manufacturing     Open Access   (Followers: 1)
International Journal of Engineering Education     Full-text available via subscription   (Followers: 6)
International Journal of Engineering Management and Economics     Hybrid Journal   (Followers: 3)
International Journal of Engineering Mathematics     Open Access  
International Journal of Engineering Pedagogy     Open Access  
International Journal of Engineering Practical Research     Open Access  
International Journal of Engineering Research in Africa     Full-text available via subscription  
International Journal of Engineering Science     Hybrid Journal   (Followers: 6)
International Journal of Engineering Systems Modelling and Simulation     Hybrid Journal   (Followers: 7)
International Journal of Engineering, Science and Technology     Open Access  
International Journal of Engineering, Social Justice, and Peace     Open Access   (Followers: 5)
International Journal of Environmental Engineering     Hybrid Journal   (Followers: 4)
International Journal of Experimental Design and Process Optimisation     Hybrid Journal   (Followers: 4)
International Journal of Fatigue     Hybrid Journal   (Followers: 34)
International Journal of Flow Control     Full-text available via subscription   (Followers: 3)
International Journal of Foresight and Innovation Policy     Hybrid Journal   (Followers: 8)
International Journal of Fracture     Hybrid Journal   (Followers: 9)
International Journal of Geo-Engineering     Open Access  
International Journal of Geotechnical Engineering     Hybrid Journal   (Followers: 4)
International Journal of Grid and Utility Computing     Hybrid Journal  
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 24)
International Journal of Heat and Mass Transfer     Hybrid Journal   (Followers: 122)
International Journal of Heavy Vehicle Systems     Hybrid Journal   (Followers: 6)
International Journal of Hypersonics     Full-text available via subscription   (Followers: 4)
International Journal of Imaging Systems and Technology     Hybrid Journal   (Followers: 1)
International Journal of Impact Engineering     Hybrid Journal   (Followers: 7)
International Journal of Information Acquisition     Hybrid Journal   (Followers: 1)
International Journal of Innovation and Applied Studies     Open Access   (Followers: 5)
International Journal of Innovation Science     Full-text available via subscription   (Followers: 8)
International Journal of Innovative Technology and Research     Open Access   (Followers: 1)
International Journal of Integrated Engineering     Open Access  
International Journal of Intelligent Engineering Informatics     Hybrid Journal  
International Journal of Intelligent Systems and Applications in Engineering     Open Access   (Followers: 2)
International Journal of Lifecycle Performance Engineering     Hybrid Journal   (Followers: 1)
International Journal of Machine Tools and Manufacture     Hybrid Journal   (Followers: 4)
International Journal of Manufacturing Research     Hybrid Journal   (Followers: 6)
International Journal of Manufacturing Technology and Management     Hybrid Journal   (Followers: 8)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 4)
International Journal of Mathematical Education in Science and Technology     Hybrid Journal   (Followers: 8)
International Journal of Mathematics in Operational Research     Hybrid Journal  
International Journal of Medical Engineering and Informatics     Hybrid Journal   (Followers: 3)
International Journal of Micro Air Vehicles     Full-text available via subscription   (Followers: 5)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 1)
International Journal of Microwave Science and Technology     Open Access   (Followers: 4)
International Journal of Mobile Network Design and Innovation     Hybrid Journal   (Followers: 1)
International Journal of Multiphase Flow     Hybrid Journal   (Followers: 4)
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal   (Followers: 2)
International Journal of Nanotechnology     Hybrid Journal   (Followers: 4)
International Journal of Nanotechnology and Molecular Computation     Full-text available via subscription   (Followers: 2)
International Journal of Navigation and Observation     Open Access   (Followers: 13)
International Journal of Network Management     Hybrid Journal   (Followers: 1)
International Journal of Nonlinear Sciences and Numerical Simulation     Hybrid Journal  
International Journal of Numerical Methods for Heat & Fluid Flow     Hybrid Journal   (Followers: 7)
International Journal of Optics     Open Access   (Followers: 1)
International Journal of Organisational Design and Engineering     Hybrid Journal   (Followers: 6)
International Journal of Pattern Recognition and Artificial Intelligence     Hybrid Journal   (Followers: 6)
International Journal of Pavement Engineering     Hybrid Journal   (Followers: 3)
International Journal of Physical Modelling in Geotechnics     Hybrid Journal   (Followers: 3)
International Journal of Plasticity     Hybrid Journal   (Followers: 6)
International Journal of Plastics Technology     Hybrid Journal   (Followers: 1)
International Journal of Polymer Analysis and Characterization     Hybrid Journal   (Followers: 5)
International Journal of Polymer Science     Open Access   (Followers: 20)
International Journal of Precision Engineering and Manufacturing     Hybrid Journal   (Followers: 6)
International Journal of Precision Engineering and Manufacturing-Green Technology     Hybrid Journal  
International Journal of Precision Technology     Hybrid Journal  
International Journal of Pressure Vessels and Piping     Hybrid Journal   (Followers: 7)
International Journal of Production Economics     Hybrid Journal   (Followers: 13)
International Journal of Quality and Innovation     Hybrid Journal   (Followers: 5)
International Journal of Quality Assurance in Engineering and Technology Education     Full-text available via subscription   (Followers: 3)
International Journal of Quality Engineering and Technology     Hybrid Journal   (Followers: 2)
International Journal of Quantum Information     Hybrid Journal   (Followers: 1)
International Journal of Rapid Manufacturing     Hybrid Journal   (Followers: 4)
International Journal of Reliability, Quality and Safety Engineering     Hybrid Journal   (Followers: 8)
International Journal of Renewable Energy Technology     Hybrid Journal   (Followers: 7)
International Journal of Robust and Nonlinear Control     Hybrid Journal   (Followers: 3)
International Journal of Science Engineering and Advance Technology     Open Access  
International Journal of Sediment Research     Full-text available via subscription   (Followers: 2)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal   (Followers: 2)
International Journal of Signal and Imaging Systems Engineering     Hybrid Journal  
International Journal of Six Sigma and Competitive Advantage     Hybrid Journal   (Followers: 2)
International Journal of Social Robotics     Hybrid Journal   (Followers: 2)
International Journal of Software Engineering and Knowledge Engineering     Hybrid Journal   (Followers: 2)
International Journal of Space Science and Engineering     Hybrid Journal   (Followers: 1)
International Journal of Speech Technology     Hybrid Journal   (Followers: 6)
International Journal of Spray and Combustion Dynamics     Full-text available via subscription   (Followers: 7)
International Journal of Surface Engineering and Interdisciplinary Materials Science     Full-text available via subscription   (Followers: 1)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Engineering     Hybrid Journal   (Followers: 7)
International Journal of Sustainable Manufacturing     Hybrid Journal   (Followers: 5)
International Journal of Systems and Service-Oriented Engineering     Full-text available via subscription  
International Journal of Systems Assurance Engineering and Management     Hybrid Journal  
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 2)
International Journal of Technoethics     Full-text available via subscription   (Followers: 1)
International Journal of Technology Management and Sustainable Development     Hybrid Journal   (Followers: 1)
International Journal of Technology Policy and Law     Hybrid Journal   (Followers: 5)
International Journal of Telemedicine and Applications     Open Access   (Followers: 3)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 7)
International Journal of Thermodynamics     Open Access   (Followers: 4)
International Journal of Turbo & Jet-Engines     Hybrid Journal   (Followers: 3)
International Journal of Ultra Wideband Communications and Systems     Hybrid Journal  
International Journal of Vehicle Autonomous Systems     Hybrid Journal  
International Journal of Vehicle Design     Hybrid Journal   (Followers: 6)
International Journal of Vehicle Information and Communication Systems     Hybrid Journal   (Followers: 2)
International Journal of Vehicle Noise and Vibration     Hybrid Journal   (Followers: 3)
International Journal of Vehicle Safety     Hybrid Journal   (Followers: 4)

  First | 1 2 3 4 5 6 7 | 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]
  • Effect of the Molten Metal Stream’s Shape on Particle Size
           Distribution of Water Atomized Metal Powder

    • Authors: Suchart Yenwiset, Tawichart Yenwiset
      Abstract: The current knowledge indicated that water pressure, molten metal temperature, water flow rate and water jet configuration are very important factors which affect on the particle size distribution and shapes of atomized powder. This study aimed to investigate whether the shape of molten affects the particle size of atomized powder. The experiments were the production of copper powder with the fixed atomization process conditions, but varied the shape of molten metal by using two different shapes of tundish nozzle’s orifice to make the round and rectangular cross section of molten metal stream. There were three sizes for each orifice shape to determine the rate of production (metal flow rate) at 13 kg/min, 19 kg/min and 26 kg/min. The results showed that at the same flow rate of molten metal the production of flat metal stream from rectangular orifice made higher yield of finer particle, smaller median size (D50) and narrower range of size distribution than the production with the round cross section orifice for every production rates.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Facile Hydrothermal Synthesis of Zeolitic ANA Membrane from Raw Kaolin

    • Authors: Thapanee Khumbudda, Aphiruk Chaisena, Kunwadee Rangsriwatananon
      Abstract: The present paper reported a preparation of zeolitic ANA (analcime) membrane on porous ceramic support by in situ synthesis method using raw kaolin as SiO2 and Al2O3 source with the molar composition of Al2O3 ∙ 2.3SiO2 ∙ 3.6Na2O ∙ 140.4H2O at hydrothermal temperature 200 ºC. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the ANA membrane. The effects of aging time and hydrothermal time on the synthesis were investigated. The porous ceramic supports were prepared by adding 10.0 wt% of cristobalite and varying an amount of pore formers (activated carbon and calcite) by sintering at 1400 ºC. This resulted in the high crystallinity of ANA observed on the support which was prepared from mixing of 2.5 wt% of activated carbon and 2.5 wt% of calcite. In addition to aging, it was observable that small crystals seemed to spread completely on the support within 3 days of aging. It seems that the longer the hydrothermal time is, the more obvious the crystals tightly bound with the support becomes.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Numerical Study of the Oregonator Models on the Basis of the Two-Phase
           Rozenbrock’s Method with Complex Coefficients

    • Authors: Rustam Djamolovich Ikramov, Svetlana Anatolievna Mustafina
      Abstract: Chemical transformations typically occur according to multiphase schemes. Changes in the concentrations of the starting materials and intermediates with time are not always described with increasing or decreasing functions. A detailed study of a complex process kinetics showed that at the presence of feedback far from equilibrium there may occur vibrational modes - periodic increase or decrease in the concentration of one of the components in time. In a numerical study of oscillating reactions there appears a problem in solving a rigid system of typical differential equations. The purpose of this study is to develop an algorithm and a program to solve the direct kinetic problem and to investigate multicomponent chemical systems with complex nonlinear dynamics.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Hydraulics, Dimensional Analysis and Visualization of Flow through
           Unpressurized Gating Systems Using Water Models

    • Authors: Venkataramani Jaiganesh, Kalakkath Prakasan
      Abstract: During recent years, foundry industry has witnessed an increasing awareness about the importance of the filling stage for the production of metallurgically sound and dimensionally stable castings. The metallurgical soundness of a casting is strongly influenced by the way the liquid metal flows through various parts of the gating system and fills the mould cavity. Owing to the importance of filling stage, extensive research has been directed towards the determination of optimum filling conditions as well as on the influence of gating parameters. In this study, the hydraulics and flow behaviour of an aluminium alloy in a pressurized, horizontal gating system with a gating ratio of 1:2:1 incorporating multiple ingates attached to a horizontally cast plate mould is investigated using transparent water models. Similitude considerations between water and aluminium were invoked in the design of water models so that the conclusions drawn from water model experiments become applicable to real casting. Runners with two different aspect ratios and four different types of ingates were examined for their influence on hydraulics and flow behaviour. Flow behaviour was visualized using a high speed camera capable of capturing images up to 10,000 frames per second. Comparison of the filling patterns between water model experiments and real time experiments with molten metal in sand moulds provided useful insights into the performance of pressurized, horizontal gating system with multiple ingates and on the utility of flow visualization using water models.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Performance Analysis of Adaptive Location Update Schemes for Continuous
           Cell Zooming Algorithm in Wireless Networks

    • Authors: Khin Cho Tun, Kunagorn Kunavut
      Abstract: To reduce the transmitted power of base stations in mobile wireless networks, continuous cell zooming algorithm is a feasible dynamic cell zooming algorithm. In this algorithm, location management is required in order to know the locations of users. Movement-based Update is not compatible and the application of Convention Periodic Update (CPU) scheme in continuous cell zooming algorithm can lead to a high signaling cost. Thus, aiming to highlight the effectiveness of newly proposed location update schemes, Time-Adaptive Periodic Update (TAPU) and Location-Adaptive Periodic Update (LAPU), a simulation-based performance analysis is conducted. Applying in continuous cell zooming algorithm, the performances of TAPU and LAPU are compared to that of Convention Periodic Update (CPU) scheme in terms of transmitted power ratio, outage ratio and the number of update messages. The performances of TAPU and LAPU are analyzed in a network with different number of users and in a network with different average moving speeds of users. The results show that compared to CPU, both TAPU and LAPU have no significant effect on power saving capability of continuous cell zooming algorithm in every scenario. Meanwhile, LAPU and TAPU give a significant reduction of update messages in every scenario. In terms of QoS effect, LAPU gives approximately the same outage ratio as CPU and a higher outage ratio occurs in TAPU.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Sensitivity Analysis of Coastal Flooding to Geographical Factors:
           Numerical Model Study on Idealized Beaches

    • Authors: Chanyut Kalakan, Anurak Sriariyawat, Sittichai Naksuksakul, Thamnoon Rasmeemasmuang
      Abstract: This study evaluated the potential of coastal trees to reduce flooding areas caused by waves with abnormal heights, such as storm surges, using a numerical model applied to idealized beaches. The study considered 5 factors that affect sensitivity of coastal areas to flooding: slope of the beach, bottom friction coefficient, length of tree lines, width of tree lines, and shape of tree areas. The results indicate that slope of the beaches can reduce flooding areas, as steep slopes can transform wave energy into potential energy. With regard to the friction coefficient, beaches with higher bottom friction factors will have fewer flooding areas. Relative to beaches with no trees at all, increasing the length and width of tree lines can reduce flooding areas by as much as 30%. However, the shapes of tree areas have no significant effect on flooding areas.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Two-Dimensional Mathematical Modeling of the Oxidative Coupling of Methane
           in a Membrane Reactor

    • Authors: Wisitsree Wiyaratn, Salamah Manundawee, Amornchai Arpornwichanop, Suttichai Assabumrungrat, Anucha Watanapa, Chidporn Worawimut
      Abstract: The oxidative coupling of methane (OCM) in a dense BSCFO membrane reactor (MR) was theoretically studied using a two-dimensional reactor model. The simulation results indicated that increasing the operating temperature results in increased CH4 conversion and decreased C2 selectivity. An increase in the methane feed flow rate lowers the CH4 conversion but increases the C2 selectivity; however, the effect of the air flow rate on the OCM membrane reactor exhibits an opposite trend. The optimum configuration of the dense BSCFO-MR to provide the best performance was 0.018 m in diameter and 0.2 m in length at a GHSV of 38904.54 h-1 and temperature of 1073 K. Under these optimal conditions, the CH4 conversion is 43.713 %, the C2 selectivity is 61.352 % and the C2 yield is 26.82 %.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • A Numerical Investigation of the Temperature Uniformity of a Billet due to
           Thermal Radiation in a Reheating Furnace

    • Authors: Tanawat Khoukit, Chittin Tangthieng
      Abstract: In Thailand, the iron and steel industry is one of the major industries to provide raw materials to other ones. In order to heat a billet to a proper temperature, it is fed into a reheating furnace, which generates heat by the combustion of fuel from direct-fired burners. After the temperature uniformity of the billet is achieved, it will be sent to the rolling process. The major mechanism of heat transfer in the reheating furnace is the thermal radiation because of the high combustion gas temperature. The temperature distribution of a billet subjected to the thermal radiation of the enclosure surfaces in a reheating furnace is presented in this study. The 2-D steady-state heat conduction equation is numerically solved by the finite volume method together with the Gauss-seidel iterative technique. A qualitative agreement between the numerical result and the data from filed measurement is presented. The variations of the temperature uniformity of the billet with different insulation thicknesses, flame temperatures and furnace floor temperatures are investigated. The result indicates the hot spot at the middle of billet originated from the position of combustion flame. When the wall insulation thickness is decreased, the thermal radiation of combustion flame is decreased, leading to the higher degree of the temperature uniformity of the billet. In case of the lower flame temperature or the higher the floor temperature, the degree of the temperature uniformity of the billet also increases.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Using Czech TCT to Access Safety Impact of Deceleration Lane at Thai
           U-Turns

    • Authors: Inder Pal Meel, Dussadee Satirasetthavee, Kunnawee Kanitpong, Pichai Taneerananon
      Abstract: The purpose of this study is to evaluate the safety impact of the deceleration lane at the Upstream Zone of at-grade U-turns on 4-lane divided highways of Thailand. A substantial speed reduction is required by the vehicles for diverging and making U-turn, and the deceleration lanes are provided for this purpose. These are also provides a storage space for the U-turning vehicle to avoid unnecessary blockage of the through lanes and reduce the potential of rear-end collisions. The safety at the U-turn is greatly influenced by the proper or improper uses of the deceleration lanes. Depending on their length, not only either the full or partial speed adjustment can occur within the deceleration lane also it influence the road users’ behavior. To assess the safety impact, the four groups of U-turns with the varying length of deceleration lanes were identified. Due to the limitations of availability and reliability of road crash data in Thailand a surrogate approach, based on traffic conflict was adopted for the study. Although the Traffic Conflict Technique (TCT) is widely accepted as an alternative and proactive approach but subjective nature of its parameters is debatable since its origin. The U-turns’ geometric data, traffic conflicts and volume data were recorded in the field. The Severity Conflict Rate (SCR) is assessed by applying weighing factor (based on severity grades according to the Czech TCT) to the observed conflicts exposed to the conflicting traffic volumes. A comparative higher value of SCR represents a lower level of traffic safety at a U-turn facility and a significant relationship was obtained between the length of deceleration lanes of the U-turns and the level of road traffic safety.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Evolution Toward 5G Mobile Networks – A Survey on Enabling
           Technologies

    • Authors: Rony Kumer Saha, Poompat Saengudomlert, Chaodit Aswakul
      Abstract: In this paper, an extensive review has been carried out on the trends of existing as well as proposed potential enabling technologies that are expected to shape the fifth generation (5G) mobile wireless networks. Based on the classification of the trends, we develop a 5G network architectural evolution framework that comprises three evolutionary directions, namely, (1) radio access network node and performance enabler, (2) network control programming platform, and (3) backhaul network platform and synchronization. In (1), we discuss node classification including low power nodes in emerging machine-type communications, and network capacity enablers, e.g., millimeter wave communications and massive multiple-input multiple-output. In (2), both logically distributed cell/device-centric platforms, and logically centralized conventional/wireless software defined networking control programming approaches are discussed. In (3), backhaul networks and network synchronization are discussed. A comparative analysis for each direction as well as future evolutionary directions and challenges toward 5G networks are discussed. This survey will be helpful for further research exploitations and network operators for a smooth evolution of their existing networks toward 5G networks.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • A Study of Liquid Sloshing in an Automotive Fuel Tank under Uniform
           Acceleration

    • Authors: Rajamani Rajagounder, Guru Vignesh Mohanasundaram, Prakasan Kalakkath
      Abstract: This paper presents the liquid free surface behaviour in a partially filled automotive fuel tank under uniformly accelerated motion. The liquid in the fuel tank is subjected to violent sloshing during sudden acceleration or stopping of the vehicle which will produce structural vibration and noise in the passenger compartment. To reduce this sloshing, baffles are to be used inside the tank. The objective of this work is to study the influence of vertical baffles and fill levels on free surface elevation of liquid in a partially filled fuel tank. The simulation of liquid free surface behaviour under uniform acceleration is done using ANSYS-FLUENT software. A numerical model has been developed based on Volume of Fluid (VOF) technique to track the free surface motion of liquid. The explicit time discretization scheme is employed to solve the volume fraction equation. From the numerical analysis, amplitude of free surface elevation and slope of free surface are predicted. Experiments are carried out with transparent fuel tank which is fabricated using glass fibre and epoxy resin. A uniform acceleration is applied to the tank and free surface displacements of liquid are captured using high speed camera. Also, an analytical model is formulated to find position of the free surface of liquid under uniform acceleration. The free surface profiles obtained from the simulations are compared with the experimental results and analytical solution. These results are found to be in good agreement.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Hybrid-lens for Terahertz Subwavelength Focusing beyond the Diffraction
           Limit

    • Authors: Piyawath Tapsanit, Masatsugu Yamashita, Chiko Otani
      Abstract: The relatively low energy of the terahertz light (THz, 1 THz=4.14 meV) promises the non-invasive optical imaging of the biomedical objects. However, the THz light inherently suffers the optical diffraction limit and the subwavelength microstructures cannot be resolved. We propose the planar hybrid-lens comprising the multiple slits and the two-dimensional rod array for the subwavelength focusing of the THz light beyond the diffraction limit. The hybrid-lens is investigated by the finite difference time domain simulation (FDTD). The spectra of the rod array obtained by FDTD are compared with the spectra calculated by the analytical model. The subwavelength focal spot about 20 µm (λ/7.5) at the frequency 2 THz is demonstrated by FDTD. The array of the subwavelength focal spots on the opposite side of the multiple slits are generated by the interferences of the Floquet-Bloch waves which can be guided through the rod array. The hybrid-lens can function as the subwavelength focusing and the substrate simultaneously which may serve as the new tool in the high-speed imaging and sensing of the subwavelength biomedical objects by using the THz light.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
  • Neural Network Based Model Predictive Control of Batch Extractive
           Distillation Process for Improving Purity of Acetone

    • Authors: Wachira Daosud, Kosit Jariyaboon, Paisan Kittisupakorn, Mohd Azlan Hussain
      Abstract: In a pharmaceutical industry, batch extractive distillation (BED), a combination process between extraction and distillation processes, has been widely implemented to separate waste solvent mixture of acetone-methanol because of minimum-boiling azeotrope properties. Normally, water is used as solvent and semi-continues mode is proposed to improve purity of acetone. The solvent is charged into the BED column until the purity of a desired product is achieved. After the total reflux start-up period is ended, a dynamic optimization strategy is applied to determine an acetone distillate composition profile maximizing the weight of the distillate product (acetone). The acetone distillate composition profile is used as the set point of neural network model-based controllers: the neural network direct inverse model control (NNDIC) and neural network based model predictive control (NNMPC) in order to provide the acetone composition with the purity of 94.0% by mole within 9.5 hours. It has been found that although both NNDIC and proportional integral derivative (PID) control can maintain the distillate purity on its specification for the set point tracking and in presence of plant uncertainties, the NNMPC provides much more satisfactory control performance and gives the smoothest controller action without any fluctuation when compared to the NNDIC and PID.
      PubDate: 2016-01-29
      Issue No: Vol. 20 (2016)
       
 
 
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