21 articles in this issue
Prinyanee Suttibut, Piyasan Praserthdam, Joongjai Panpranot
The performances of MgO admixed WO3/SiO2 catalysts were investigated in the cross metathesis of ethylene and 2-butene to propylene at 450oC atmospheric pressure. Compared to the WO3/SiO2 + silica gel, the conversion of 2-butene and the propylene selectivi... see more
Jittraporn Kruatim, Sasiradee Jantasee, Bunjerd Jongsomjit
The Co/SBA-15 and the Co/SBA-16 catalysts having 20 wt% of cobalt were prepared by the conventional impregnation method. Then, the post-impregnation treatments including vacuum and ultrasound treatments were applied. The synthesized catalysts were charact... see more
Doonyapong Wongsawaeng, Sarayut Khemngern, Naraporn Somboonna
A 13.56 MHz RF plasma discharge was successfully utilized to activate and coat Thai silk fabrics with chitosan for durable antibacterial property. Uncolored and untreated Thai silk fabrics were activated in Ar plasma for 5 minutes with an optimized RF pow... see more
Hanifrahmawan Sudibyo, Rochmadi Rochmadi, Mohammad Fahrurrozi
Palm Fatty Acid Distillate (PFAD) is a byproduct of CPO production. PFAD conversion into monoglyceride would give significant economic added value to it. With free fatty acid as the major component which composes the PFAD, then the esterification process ... see more
Ashok B., Denis Ashok S., Ramesh Kumar C.
Nowadays, electronic throttle control system is widely adapted in the motorcycle for better drivability, fuel economy and reduces the emissions. In such systems, pedal follower or torque based approach are used for calculating the required throttle angle ... see more
Natkritta Boonprakob, Weerasak Chomkitichai, Jiraporn Ketwaraporn, Aimon Wanaek, Burapat Inceesungvorn, Sukon Phanichphant
BiOI/TiO2 nanocomposites were successfully prepared by the two-step method, co-precipitation/solvothermal method. The amount of BiOI in the composites were varied as 0, 5.0, 7.5, 10.0 and 12.5 mol%. XRD results exhibited sharp and narrow diffraction peaks... see more
Kitjapat Phuvoravan, Phattaraphong Ponsorn
In evaluation the lateral torsional buckling moment of Elliptical Cellular beams, it cannot be directly accurately calculated because the sectional properties of the Elliptical Cellular beam are not constant along the beam length. Consideration of section... see more
Kanokporn Pintobtang, Tumrong Puttapitukporn
Water-filled containers have long known for its structural characteristic of impact load absorption. This paper presents design of structures resisting to impact load resulting from a high-velocity tennis ball. One cubic meter water containers consisting ... see more
Wachira Daosud, Jedsada Thampasato, Paisan Kittisupakorn
Crystallization processes have been widely used for separation in many fields to provide a high purity product. In this work, dynamic optimization and neural network (NN) have been applied to improve the quality of the product: citric acid. In the dynamic... see more
Alongkorn Pimpin, Werayut Srituravanich
This study aims to demonstrate a simple fabrication technique of freestanding electroplated metallic microstructures by modifying a substrate roughness. The proposed technique utilizes counter effects between two forces, i.e. an intrinsic force causing sh... see more
Dayanand M. Goudar, V. C. Srivastava, G. B. Rudrakshi
Abstract: In the present work the effect of process parameters on the characteristics of Al-17Si alloy powder produced by gas atomization using a free fall nozzle of different apex angles. The axial gas velocity away from the nozzle exit is measured for d... see more
Supachai Lakkam, Phupoom Puangcharoenchai, Kullayot Suwantaroj
The purpose of this study was to investigate the vibration characteristics caused by front and back vented brake disc which were physical shape difference. According to theory of heat transfer, the heat transfer rates of two types of brake disc were diffe... see more
Suppachai Chainarong, Chaiyoot Meengam, Muhamad Tehyo
The objective of research is to investigate the parameters, microstructure and mechanical properties of butt joint SSM356 with SSM6061 aluminum alloy by using RFW processes. The main parameters for rotation speeds are 1550, 1700 and 1850 rpm and for burn ... see more
Yannis L. Karnavas, Ioannis D. Chasiotis
Most of the electrical machines design studies found in literature lie on the concept that the design under investigation (and optimization) focuses mainly on the geometrical aspects of the machine and thus takes into account only a certain ferromagnetic ... see more
Withit Chatlatanagulchai
Input shaping convolutes the reference signal with a sequence of impulses, whose amplitudes and timings are designed to produce a shaped reference that avoids exciting lightly-damped modes to reduce residual vibration from a quick movement. The input shap... see more
Wasan Suwannahong, Chakrit Suvanjumrat
Roller chain and sprockets has important components of the drive system in production lines for any industries. Many problems which concerned to failure of roller chain and sprockets would break down the producing process. To understand every failure beha... see more
Abdul Hadi N. Khalifa, Johain J. Fataj, Ali K. Shaker
In this work, a performance study was achieved on air cooled condenser of an air-conditioning unit. An experimental investigation was carried out on two condenser designs aided by a controlled environmental zone, which was designed and constructed for the... see more
Jidsucha Darayen, Panaaek Athichalinthorn, Ratchatee Techapiesancharoenkij, Sasawat Mahabunphachai, Chedtha Puncreobutr, Gobboon Lothongkum, Boonrat Lohwongwatana
Diffusion couples of pure gold and pure tin were created by mechanical cold rolling method. The couples were isothermally treated at temperatures slightly above and below the eutectic temperature near tin-rich region of the equilibrium phase diagram. Diff... see more
Jirapol Klinbun, Pradit Terdtoon
A new way to remove the intense heat by developing and implementing an innovative low cost compact loop thermosyphon has been widely observed. Especially, it was concluded that nano-fluids are potential heat transfer fluids to be used as working fluid in ... see more
Piti Chantruthai, Thananan Areepong, Sasitorn Issaro, Saravut Jaritngam
This paper details the impact arising from the lateritic soil quarrying activity in many communities within Songkhla province of Southern Thailand. The affected communities of Ban Khuan Chong, Ban Huay Oan and Ban Thung Don were selected as target areas f... see more
Soamsiri Chantaraskul, Chayaphon Tanwongvarl
One of the major problems in Wireless Sensor Networks (WSNs) is the traffic congestion caused by increasing number of devices sharing the limited spectrum of the ISM (Industrial, Scientific, and Medical radio) band. As a result, a new concept of Cognitive... see more