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Uttaradit, Thailand

Uttaradit Rajabhat University or URU is a Thai public university under the Rajabhat system. The campus is located just within of Uttaradit, a small city north of Bangkok. It was established in 1936 in the name of The Uttaradit Teachers College Uttaradit. Rajabhat University is the first university of Uttaradit ProvinceOn 14 June 2004, all Rajabhat institutes nationwide were graciously upgraded by His Majesty the King, who signed the Rajabhat University Act, B.E 2547 , which was announced in the Royal Gazette for implementation starting from 15 June 2004. This promoted all Rajabhat institutes to become a Rajabhat University, a closely knitted group of Thai universities dedicated to the preservation of Thai heritage and subject to the National Tertiary Education Commission of the Ministry of Education. Wikipedia.

Tangjuank S.,Uttaradit Rajabhat University
International Journal of Physical Sciences | Year: 2011

The aims of this research were to study the production processes and properties of thermal insulation produced from pineapple leaves using natural rubber latex as a binder. Thermal insulation boards were made by spraying the pretreated natural rubber latex onto pineapple fiber to form a squared thermal insulation with the size of 20 and 1.5 cm thickness. Test results on thermal and physical properties showed that the thermal insulation produced from pineapple leaves fiber exhibited a considerably good thermal insulation. The thermal conductivity of the thermal insulation was 0.035 W/m.K with density of 210 kg/m3, which was closed to the commercial insulator. The result showed that pineapple fibrous insulator was extremely potential to replace the synthesis fibrous insulator. © 2011 Academic Journals. Source

Pinyaphong P.,Uttaradit Rajabhat University | Sriburi P.,Chiang Mai University | Phutrakul S.,Chiang Mai University
World Academy of Science, Engineering and Technology | Year: 2011

In this paper, naturally immobilized lipase, Carica papaya lipase, catalyzed biodiesel production from fish oil was studied. The refined fish oil, extracted from the discarded parts of fish, was used as a starting material for biodiesel production. The effects of molar ratio of oil: methanol, lipase dosage, initial water activity of lipase, temperature and solvent were investigated. It was found that Carica papaya lipase was suitable for methanolysis of fish oil to produce methyl ester. The maximum yield of methyl ester could reach up to 83% with the optimal reaction conditions: oil: methanol molar ratio of 1: 4, 20% (based on oil) of lipase, initial water activity of lipase at 0.23 and 20% (based on oil) of tert-butanol at 40°C after 18 h of reaction time. There was negligible loss in lipase activity even after repeated use for 30 cycles. Source

Maneewan S.,Buriram Rajabhat University | Udorn N.,Nakhon Phanom University | Duangmalai D.,Nakhon Phanom University | Silapan P.,Uttaradit Rajabhat University | Jaikla W.,King Mongkuts University of Technology Thonburi
Advances in Electrical and Electronic Engineering | Year: 2014

This article presents a new voltage-mode first order allpass filter (APF) employing voltage differencing transconductance amplifier (VDTA). The advantages of the circuit are that: the circuit description is very compact, consists of merely a VDTA and a capacitor: the phase shift can be electronically adjusted by current bias: it provides the lower THD of the output signal. Without any component matching conditions, the proposed circuit is very appropriate to further develop into an integrated circuit. Moreover, the proposed APF can provide the output current with high output impedance without modification of the circuit topology. The PSpice simulation results are depicted. The given results agree well with the theoretical anticipation. The maximum power consumption is 400μ W at ±1.25V power supplies. © 2014 Advances in electrical and electronic engineering. Source

Khampanit A.,King Mongkuts University of Technology Thonburi | Leelataviwat S.,King Mongkuts University of Technology Thonburi | Kochanin J.,Uttaradit Rajabhat University | Warnitchai P.,Asian Institute of Technology
Engineering Structures | Year: 2014

This paper presents the application of an energy-based seismic design procedure to strengthen non-ductile reinforced concrete frames using buckling-restrained braces. An experimental study was conducted to examine the seismic behavior of a large-scale non-ductile RC specimen strengthened with BRBs. For the analytical study, a large number of dynamic analyses of non-ductile systems that were strengthened using ductile elements with varying strength were conducted to investigate the overall response behavior. Finally, a practical strengthening design method was presented. The method was based on the modified performance-based plastic design approach. A design example was presented. Nonlinear pushover and nonlinear time history analyses were conducted to evaluate the performance of a non-ductile RC frame strengthened with BRBs. Both the test and analysis results indicated that BRBs significantly increased the stiffness, lateral force capacity and energy dissipation. The analysis results of the strengthened frame exhibited significant response improvement in terms of structural performance and story drifts. The results were used to verify the effectiveness of the presented design approach. © 2014 Elsevier Ltd. Source

Kanyamee K.,King Mongkuts University of Technology Thonburi | Kanyamee K.,Uttaradit Rajabhat University | Sathitwiriyawong C.,King Mongkuts University of Technology Thonburi
International Arab Journal of Information Technology | Year: 2014

This paper proposes two versions for the implementation of a novel High-Availability Decentralized cryptographic Multi-agent Key Recovery System (HADM-KRS) that do not require a key recovery centre: HADM-KRSv1 and HADM-KRSv2. They have been enhanced from our previous work and entirely comply with the latest key recovery system in the National Institute of Standards and Technologies (NIST's) framework. System administrators can specify the minimum number of Key Recovery Agents (KRAs) according to security policies and requirements while maintaining compliance with legal requirements. This feature is achieved by applying the concept of secret sharing and power set to distribute the session key to participating KRAs. It uses the principle of secure session key management with an appropriate design of key recovery function. The system is designed to achieve high availability despite the failure of some KRAs. The performance evaluation results show that the proposed systems incur little processing times. They provide a security platform with good performance, fault tolerance, and robustness in terms of secrecy and availability. Source

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