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Udomariyasap P.,Chaiyaphum Rajabhat University | Noppanakeepong S.,King Mongkut's University of Technology Thonburi | Pornsuwancharoen N.,Rajamangala University of Technology Isan Sakon Nakhon Campus
Advanced Materials Research | Year: 2014

Propose the simulation of THz carrier frequencies using the small device and a Gaussian beam propagating within the device system. We found that the generated output power with the high frequency can be achieved. This consisted of a serial nonlinear micro ring resonator system for generating pulse and signal filter by Add/Drop filter, a technology optical communication by the micro ring resonator which generates the THz frequency multiple, whereas channel capacity in term of multi frequency bands can be provided by optical Add/Drop multiplexing. The increase in the number of channel capacity can be obtained by the increase in frequency density, while the security was introduced by the specific frequency filter, which was operated by the central operator. The optical micro ring resonators for THz frequency generation and enhancement are reviewed. The advantage of proposed system can be implemented by using the simultaneous optical communication system. © (2014) Trans Tech Publications, Switzerland.


Pattra S.,Chaiyaphum Rajabhat University | Sittijunda S.,Udon Thani Rajabhat University
Energy Procedia | Year: 2015

Response surface methodology (RSM) with central composite design (CCD) was applied to optimize hydrolysis conditions of water-hyacinth stem (WHS). Firstly, the effects of reaction time (h), % diluted H2SO4 concentration (v/v) and shaking speed (rpm) for hydrolyze WHS were investigated. The optimum condition for WHS hydrolysis was reaction time of 7.73 h, H2SO4 concentration of 1.31% (v/v) and stirring speed of 264.41 rpm in which a maximum total sugar of 13 g/L was obtained. Secondly, the hydrolysate WHS obtained from the optimum hydrolysis condition was further used as the substrate for hydrogen production by heat-treated anaerobic sludge. Results showed that the maximum HP of 127. 6 mmol H2/L was obtained. © 2015 The Authors. Published by Elsevier Ltd.


Chansanam W.,Chaiyaphum Rajabhat University | Tuamsuk K.,Khon Kaen University | Kwiecien K.,Khon Kaen University | Ruangrajitpakorn T.,National Electronics and Computer Technology Center | Supnithi T.,National Electronics and Computer Technology Center
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2015

This paper proposes a semantic knowledge retrieval methodology that comprises of the evaluation of resources and relationships between association resources, the identification of applicable information based on belief culture ontology, a semantic system of resources, attributes, and properties. The proposed method is based on a newly developed ontology focused on tacit knowledge of belief culture. From this study, domain experts can search semantically associated resources for their terminology query. © Springer International Publishing Switzerland 2015.


Reungsang A.,Khon Kaen University | Pattra S.,Chaiyaphum Rajabhat University | Sittijunda S.,Burapha University
Energies | Year: 2012

Response surface methodology with a central composite design was applied to optimize the key factors affecting methane production from the acidic effluent coming from the sugarcane juice hydrogen fermentation process. The parameters studied were substrate concentration, ratio of NaHCO3 to substrate concentration and initial pH. The experimental results showed that substrate concentration and initial pH had significant individual (p < 0.05) effect on methane yield (MY). However, there was no interactive effect between these variables (p > 0.05). The maximum MY of 367 mL CH4/g-volatile solid (VS)added was obtained at the optimum conditions of 13,823 mg-COD/L, an NaHCO3 to substrate concentration ratio of 3.09 and an initial pH of 7.07. Under the optimum conditions, MY was enhanced 4.4-fold in comparison to raw effluent. © 2012 by the authors.


Yingram M.,Chaiyaphum Rajabhat University | Chansanam W.,Chaiyaphum Rajabhat University | Chinnabutr K.,Rajamangala University of Technology at Tawan-ok | Kudpik R.,Rajamangala University of Technology at Lanna
ECTI-CON 2015 - 2015 12th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology | Year: 2015

The objective of this paper show perturbation of active islanding detection techniques in power system network on Matlab/Simulink, voltage shift islanding detection technique represents active islanding detection techniques. Simulation results on Matlab/Simulink show that voltage shift of active islanding detection technique has detect the island fast and it has not nondetection zone. But, it perturbed the system every time which the control system of inverter injected a signal of voltage shift to check that occurrence condition is islanding condition or not. Similarly, active islanding detection techniques have perturbed the power system network to check occurrence condition. © 2015 IEEE.


Srichaiwong P.,Chaiyaphum Rajabhat University | Kwewjai L.,Chaiyaphum Rajabhat University | Kroeksakul P.,Srinakharinwirot University
Asian Social Science | Year: 2014

This biodiversity study of natural food production to supporting the communities upstream of Chi River Basin aims at collecting the name and species of natural food plants in the forest around the upstream areas of Chi River Basin. This is a phenomenal study of species and potential benefits of forest food. Qualitative methodology was mainly used to collect data; the study relied on the knowledge of the local people had to recall the local data, which significantly focused on the species of natural food plant. The study site was located in the Nongbuadaeng district of Chaiyaphum province, Thailand. It was found that almost all the villagers in the Isaan region (northeastern Thailand) are in the agricultural sector, growing cash crops, such as cassava and sugarcane, the farming of which has affected deforestation and therefore natural food production since the forest is the source of local food. The research focused on species of natural food plants in the community upstream of the Chi River Basin. The information of natural food production biodiversity is in a database for use as guidelines for introducing natural conservation in food security planning with sustainable livelihood in the future. The biodiversity of natural food production to support the community in the upstream forest of the Chi River Basin has 109 species, which can be separated into the following categories: tree (22.9%), plant in wetlands (20.18%), climber (19.27%), mushroom (19.27%), shrub and annual crops (12.84%), and bamboo (5.50%). The taste of natural food plant production includes 5 tastes: tasteless, bitter, astringent, sour, and spicy, and how plants are used for food depends on the species of plant. However, almost all natural food in the forest are seasonal products; for example, the bamboo shoot villagers can collect the whole year, while fruits primarily flourish between August and September.


Srichaiwong P.,Chaiyaphum Rajabhat University | Kwawjai L.,Chaiyaphum Rajabhat University | Kroeksakul P.,Srinakharinwirot University
Asian Social Science | Year: 2014

The study of guideline for natural food conservation of communities around the upstream forest of the Chi river basin has aimed to find a way to cultivate the natural food plants of a community in the buffer zone between a national park and the community around and upstream forest in the Nongbuadang District, Chaiyaphum Province, Thailand. This study was phenomenological, with a, qualitative method used to collect data from four key informant (KI) groups; local wisdom (10 persons), government officials form Phukeaw National Park (two persons), village headmen (seven persons) and villagers using natural product in forest (40 persons). It was found that there are two patterns of natural food use for villagers from the forest; 1) consumption in the household; and 2) finding for sale in the local market. There are two levels of problems: 1) impact from government policy with national development relating to land use for increasing potential of agriculture production; and 2) behavior of villagers regarding resource use. However, the present government is mainly organized to conserve resources. Nevertheless, the guidelines of natural food conservation are created so the government must empower communities with villager participation, create cognizance in villagers around the forest, use local wisdom as a mechanism for transferring knowledge, set up a public network for learning and working including group responsibility, and create a pattern of demonstration plots.


Assawamongkholsiri T.,Khon Kaen University | Reungsang A.,Khon Kaen University | Pattra S.,Chaiyaphum Rajabhat University
International Journal of Hydrogen Energy | Year: 2013

Activated sludge (AS) from wastewater treatment plant of brewery industry was used as substrate for hydrogen production by anaerobic mixed cultures in batch fermentation process. The AS (10% TS) was pretreated by acid, heat and combined acid and heat. Combined acid- heat treatment (0.5% (w/v) HCl, 110 °C, 60 min) gave the highest soluble COD (sCOD) of 1785.6 ± 27.1 mg/L with the highest soluble protein and carbohydrate of 8.1 ± 0.1 and 38.5 ± 0.8 mg/L, respectively. After the pretreatment, the pretreated sludge was used to produce hydrogen by heat treated upflow anaerobic sludge blanket (UASB) granules. A maximum hydrogen production potential of 481 mL H 2/L was achieved from the AS pretreated with acid (0.5% (w/v) HCl) for 6 h. Copyright © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.


Chansanam W.,Chaiyaphum Rajabhat University | Tuamsuk K.,Khon Kaen University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2015

This paper presents an Imaginary Beings knowledge structure, expanded from the knowledge domain of “Belief Culture” in the authors’ previous study. The knowledge was derived from several resources, content analysis was used, and then the knowledge structure was implemented in the KOS using the Idealized Cognitive model. This preliminary study found that the structure of knowledge on imaginary beings contains 5 sub-categories and 120 instances. © Springer International Publishing Switzerland 2015.


Jansri S.,Chaiyaphum Rajabhat University
Energy Procedia | Year: 2015

A suitable heterogeneous catalyst for reducing 20 wt.% of free fatty acid (FFA) that is contained in vegetable oil to less than 3 wt.% through re-esterification was investigated. There were two groups of heterogeneous catalyst used to reduce FFA: 1) zinc compound: Zn, ZnCl2, ZnO and ZnSO4·7H2O, and 2) stannum compound: SnCl4·5H2O and SnCl2·2H2O. The reaction was operated at 150°C under ambient pressure, stirred at 600 rpm. with spent retention time of approximately 180 min. Final FFA in re-esterification of products, which were cleaned up with centrifuging and hot wet washing, was monitored. The results after centrifuge indicated that only two catalysts (Zn and ZnO) were capable of promoting the reaction and achieving the requirement. Moreover, final FFA in re-esterification of products, which were cleaned up with hot wet washing, was also monitored. It was found that no significant differences existed in the two purification techniques except for the heterogeneous Zn catalyst in re-esterification product. The results showed that thin layer chromatography with a flame ionization detector (TLC/FID) could not detect all of the compositions in the pre-treatment product using Zn as a catalyst. Therefore, ZnO was the most suitable catalyst for effectively reducing FFA via a re-esterification process. © 2015 The Authors. Published by Elsevier Ltd.

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