Muban Chombueng Rajabhat University
Ratchaburi, Thailand

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Akatimagool S.,King Mongkut's University of Technology Bangkok | Intarawiset N.,King Mongkut's University of Technology Bangkok | Inchan S.,Muban Chombueng Rajabhat University
APCAP 2016 - 2016 IEEE 5th Asia-Pacific Conference on Antennas and Propagation, Conference Proceedings | Year: 2016

In this research, a bandpass waveguide filter using cascaded inductive and capacitive irises, is designed and fabricated for satellite communication system. The bandpass filters in rectangular waveguide were studied and analyzed by the CST Microwave Studio®. Thus, the proposed bandpass filters was implemented and measured by using network analyzer. The results shown that the center frequency of bandpass filter is at 4.0 GHz, and the bandwidth is equal to 100 MHz. The measured results are successfully in comparing to simulation program. © 2016 IEEE.

Ketcham M.,KING.INFO | Yimyam W.,Phetchaburi Rajabhat University | Chumuang N.,Muban Chombueng Rajabhat University
Advances in Intelligent Systems and Computing | Year: 2016

The segmentation is the first important step for optical character recognition (OCR) system. It separate the image text documents into line, characters and word. The accuracy of the recognition system mainly rely on the algorithm in segmentation. The challenge of segmentation is overlapping therefore this paper presents a new high performance algorithm in the segmentation on Palm leaf manuscript’s Isan Dhamma overlap characters. © Springer International Publishing Switzerland 2016.

Kaewkhao J.,Nakhon Pathom Rajabhat University | Siriprom W.,Kasetsart University | Insiripong S.,Muban Chombueng Rajabhat University | Ratana T.,King Mongkut's University of Technology Thonburi | And 2 more authors.
Journal of Physics: Conference Series | Year: 2011

Glasses based on borosilicate system were prepared by melt-quenching method in the composition range of (mol%) 20Na2O : 1.0Al2O 3 : 13B2O3 : 6.3CaO : 0.2Sb2O 3 : 4.5BaO : (55-X)SiO2 : xFe2O3 (where x 0, 5, 10, 15, 20 and 25) and the structural, optical and magnetic properties were investigated. The result showed that the density and molar volume of glasses increased with increasing of Fe2O3 concentration. This might be due to an increase of Fe2O3 concentration at the expense of SiO2 caused the opened glass network structure. Fe2O3 also affected the change of B 2O3 structure detected by FTIR technique. The magnetic measurement revealed that the glass sample exhibited a ferrimagnetic behavior when doping with 25 % mol Fe2O3. © Published under licence by IOP Publishing Ltd.

Ruengsri S.,Nakhon Pathom Rajabhat University | Insiripong S.,Muban Chombueng Rajabhat University | Sangwaranatee N.,Suan Sunandha Rajabhat University | Kaewkhao J.,Nakhon Pathom Rajabhat University
Progress in Nuclear Energy | Year: 2015

In this work, barium borosilicate glasses produced by using rice husk ash in the compositions xBaO:(80-x)B2O3:20RHA (where x = 30, 35, 40 and 45 wt%) were prepared by melt quenching technique and investigated for their radiation shielding properties. The mass attenuation coefficients, effective atomic numbers and effective electron densities of the glasses were found to increase with the increasing of BaO concentration and the decreasing of gamma rays energy. The glasses in this work exhibited good radiation shielding properties by providing shorter mean free paths (MFP) than all commercial windows; ordinary, hematite and Ilmanite-limonite concretes. The shorter MFP in the glasses with higher BaO in glass matrices reflects the better gamma rays shielding properties. The radiation shielding results and optical transparency of the glasses indicate that the glasses in the present study can be used as radiation shielding materials with higher transparency. © 2015 Elsevier Ltd.

Sitthikhankaew R.,King Mongkut's University of Technology Thonburi | Sitthikhankaew R.,Muban Chombueng Rajabhat University | Chadwick D.,Imperial College London | Assabumrungrat S.,Chulalongkorn University | And 2 more authors.
Fuel Processing Technology | Year: 2014

In the present work, low grade activated carbon was upgraded by steam activation to improve its surface properties and further impregnated with potassium hydroxide (KOH) to promote the H2S chemisorption for desulfurization applications. The H2S adsorption performance of these prepared samples was tested at ambient temperature under various operating conditions i.e. in the presence of isolated and integrated relative humidity (70%), O2 (2%), and CO2 (40%). It was found that the KOH impregnated activated carbons provide significantly higher H2S adsorption capacity and breakthrough time than the non-impregnated sample. Importantly, the presence of O2 in the gas stream greatly increases the breakthrough time of H2S adsorption, while the presence of humidity significantly increases the H2S adsorption capacity; these positive effects are related to the promotion of H2S oxidation to elemental sulfur and H2S dissociation. In contrast, the presence of CO2 strongly inhibited H2S adsorption due to competitive adsorption and reaction between CO2 and H2S, particularly for the KOH impregnated samples. Nevertheless, it was revealed from the study that the presence of O2 and humidity along with CO2 can efficiently minimize this negative effect; therefore, this highlights the importance of O2 and humidity addition for biogas purification. © 2014 Elsevier B.V. All rights reserved.

Namboonruang W.,Muban Chombueng Rajabhat University
Advanced Materials Research | Year: 2014

In this paper the scope of the study is grounded on the conceptual ideas of Cradle to Grave and discussion on the full process of the local pozzolanics soil blocks or Muban Chombueng Product, MCP. First, the raw materials extraction and acquisition process, followed by using an end product and the process of natural degradation. The goal of this carbon footprint, CF study is to be compare the best products between MCP and commercial cement block, CB with the least effect on the environment and to guide the development of masonry unit towards a net reduction of resource requirement and emissions. © (2014) Trans Tech Publications, Switzerland.

Weerapol,Muban Chombueng Rajabhat University | Namboonruang,Muban Chombueng Rajabhat University
MATEC Web of Conferences | Year: 2016

The study of an infrastructure development is continuously one of the targets of the national economic and social development plan. The purpose is to develop the local area sustainably and increase the ability of local authorities who have a direct role to promote and plan the other factors effectively. To success this plan the government agencies have to focus on the development dimension and taking into account other factors that may affect the way of life of the community. © 2016 The Authors, published by EDP Sciences.

Namboonruang W.,Muban Chombueng Rajabhat University | Yongam-Nuai P.,Muban Chombueng Rajabhat University
Key Engineering Materials | Year: 2016

This research studies on the possibility of producing a more sustainable lightweight brick. Natural cellulose fibre produced from leaf and wood aggregates, lime and soil from local area of Thailand were added into the brick with minimizing Portland cement content. Effects of varied amount of cellulose fibre contents typically (10, 15, 20, 25, 30, 35, 40, 45, 50, 55 and 60 %) on mechanical and thermal properties of bricks are studied. Mechanical performances have been investigated with compressive, flexural strength and thermal conductivity of the samples. Also, the Leachate Extraction Procedure is observed. Results showed that adding more cellulose fibre contents can reduce the thermal conductivity, density including the compressive and flexural strength of the brick. On the other hand, the water absorption increases. It is also shown that the composite bricks can add fibre contents up to 55% by weight that can be used as non-load bearing concrete masonry units considered by the compressive strength. By conclusion, this application may be an interesting solution in order to improve sustainability and energy efficiency of the low cost house in local area of Thailand. © 2016 Trans Tech Publications, Switzerland.

Chai-ittipornwong T.,Muban Chombueng Rajabhat University
Computing, Control, Information and Education Engineering - Proceedings of the 2015 2nd International Conference on Computer, Intelligent and Education Technology, CICET 2015 | Year: 2015

Eco-design within sustainability of bottled water is not new, however, the constructive application has not been largely adopted. The paper was thus aimed to provide the evidence-based application using eco-design for developing the product and process of PET–bottled water, in comparison. Three ways to understand the implications include (i) minimum resource consumption, (ii) maximum resource benefits (iii) waste and impact reduction, with the research method of in-depth interview and field survey. The prominent findings are that the comparative results between the product and the process development somewhat differ, the success goes into the process over the product term, and that the approach of maximum resource benefits is highly valued over the other two indexes. In Thai market, recycled-PET is less considered significant to any new application among the bottlers and the improvement of efficiency in water resource is needed. In conclusion, eco-design can be a primary stage of responsible industry development in the realm of sustainability in which environmental consciousness among all concerns shall be fully developed. KEYWORDS Bottled water; Eco-design; Polyethylene terephthalate bottle. © 2015 Taylor & Francis Group, London.

Namboonruang W.,Muban Chombueng Rajabhat University
MATEC Web of Conferences | Year: 2016

This work emphasizes on the studying of using silica to develop for the production of refractory materials. Materials are tested at the cured times of 7, 14 and 28 days. Results show that the cold crushing strength, flexural strength and bulk density increase with increasing cured times. On the other hand, the permanent linear change (PLC) decreases with increasing cured times. It is also found that adding more silica contents can increase the durability of cracking property due to temperature changing. This study concludes that the silica refractory materials (SRM) shows the enough quality to produce as the refractory material, type of the Conventional Cast/Pound (815 °C) for the agroindustry using the thermal energy of Thailand. © The Authors, published by EDP Sciences, 2016.

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