Browsing by Author "Thailand National Electronics and Computer Technology Center"
Now showing 1 - 20 of 145
- Results Per Page
- Sort Options
Publication Metadata only 3D-printed guided mode resonance readout system for biomedical and environmental applications(2021-06-30) Hironmay Deb; Nantarat Srisuai; Sakoolkan Bonruang; Romuald Jolivot; Chamras Promptmas; Waleed S. Mohammed; Mahidol University; Bangkok University; Thailand National Electronics and Computer Technology CenterThis paper demonstrates design and development of an open-source platform-based reflection spectroscopy readout system for guided mode resonance (GMR) sensing applications. The GMR dimensions, reflection grating period, imaging system and components orientations are optimized to enhance the angular resolution while sustaining resonance excitation within the visible range. To achieve the needed arrangement of the multiple components, 3D printing is utilized to build the mechanical mounting. The reflection spectra are extracted from the webcam images and processed using a software written on raspberry-pi computational unit. This ensures the compactness and portability of the system. The system performance of the transducer is tested by measuring the changes in the refractive index of the environment at the GMR chip interface.Publication Metadata only AAO-CNTs electrode on microfluidic flow injection system for rapid iodide sensing(2011-06-15) Ditsayut Phokharatkul; Chanpen Karuwan; Tanom Lomas; Duangjai Nacapricha; Anurat Wisitsoraat; Adisorn Tuantranont; Thailand National Electronics and Computer Technology Center; Mahidol University; Faculty of PharmacyIn this work, carbon nanotubes (CNTs) nanoarrays in anodized aluminum oxide (AAO-CNTs) nanopore is integrated on a microfluidic flow injection system for in-channel electrochemical detection of iodide. The device was fabricated from PDMS (polydimethylsiloxane) microchannel bonded on glass substrates that contains three-electrode electrochemical system, including AAO-CNTs as a working electrode, silver as a reference electrode and platinum as an auxiliary electrode. Aluminum, stainless steel catalyst, silve r and platinum layers were sputtered on the glass substrate through shadow masks. Aluminum layer was then anodized by two-step anodization process to form nanopore template. CNTs were then grown in AAO template by thermal chemical vapor deposition. The amperometric detection of iodide was performed in 500-μm-wide and 100-μm-deep microchannels on the microfluidic chip. The influences of flow rate, injection volume and detection potential on the current response were optimized. From experimental results, AAO-CNTs electrode on chip offers higher sensitivity and wider dynamic range than CNTs electrode with no AAO template. © 2011 Elsevier B.V. All rights reserved.Publication Metadata only Ab initio calculation of high pressure phases and electronic properties of CuInSe2(2012-01-01) Prayoonsak Pluengphon; Thiti Bovornratanaraks; Sornthep Vannarat; Kajornyod Yoodee; David Ruffolo; Udomsilp Pinsook; Chulalongkorn University; South Carolina Commission on Higher Education; Thailand National Electronics and Computer Technology Center; Mahidol UniversityWe used an ab initio method to calculate the high pressure phases of CuInSe 2 . By using the experimentally suggested phases, the enthalpy difference showed that the I4̄2d structure transforms into Fm3̄m at 12 GPa and then into Cmcm at 42 GPa. The volume reductions at each phase transition are 13.9% and 1.9% respectively, compared with 11% and 1% from experiments. By using the sX-LDA functional, we found that the bandgap in the I4̄2d structure increases at the rate of 39.6 meV/GPa, in fair agreement with photoabsorption experiments. The band gap is closed in the Fm3̄m and Cmcm structures. The bond lengths between Cu-Se and In-Se were investigated. We found that the bond lengths can be related to the behavior of the energy gap under high pressure. The path of transformation from Fm3̄m to Cmcm was proposed. The energy barrier between the two phases was estimated. The upper bound of the energy barrier is 17 meV which is equivalent to 198 K. This finding can explain the existence of two phases at room temperature reported by experimental study. © 2012 Published by Elsevier Ltd.Publication Metadata only ABO blood-typing using an antibody array technique based on surface plasmon resonance imaging(2013-09-09) Nongluck Houngkamhang; Apirom Vongsakulyanon; Patjaree Peungthum; Krisda Sudprasert; Pimpun Kitpoka; Mongkol Kunakorn; Boonsong Sutapun; Ratthasart Amarit; Armote Somboonkaew; Toemsak Srikhirin; Mahidol University; Suranaree University of Technology; Thailand National Electronics and Computer Technology CenterIn this study, readily available antibodies that are used in standard agglutination tests were evaluated for their use in ABO blood typing by a surface plasmon resonance imaging (SPR imaging) technique. Five groups of antibodies, including mixed clones of anti-A, anti-B, and anti-AB, and single clones of anti-A and anti-B, were used to construct the five-line detection arrays using a multichannel flow cell in the SPR imager. The red blood cell (RBC) samples were applied to a multichannel flow cell that was orthogonal to the detection line arrays for blood group typing. We found that the blood samples were correctly grouped in less than 12 min by the SPR imaging technique, and the results were consistent with those of the standard agglutination technique for all 60 samples. We found that mixed clones of antibodies provided 33%-68% greater change in the SPR signal than the single-clone antibodies. Applying the SPR imaging technique using readily available antibodies may reduce the costs of the antibodies, shorten the measurement time, and increase the throughput. © 2013 by the authors; licensee MDPI, Basel, Switzerland.Publication Metadata only Adaptive bandwidth allocation for per-station fairness on wireless access router(2010-12-01) Vasaka Visoottiviseth; Akkasit Trunganont; Siwaruk Siwamogsatham; Mahidol University; Thailand National Electronics and Computer Technology CenterAccording to the nature of IEEE 802.11 wireless LAN, the bandwidth is shared among wireless devices. However, the bandwidth could not be fairly shared among stations, because some users may use greedy applications which prevent other applications from connecting to the Internet. These applications are for example, video streaming applications, download accelerators and P2P applications. Moreover, Distributed Coordination Function (DCF) mechanism provided in the 802.11 MAC protocol originates the per-flow unfairness problem between uplink and downlink flows, as uplink flows usually dominate downlink flows and leads to unfair bandwidth allocation among wireless stations. In this paper, we propose an adaptive bandwidth allocation mechanism to provide per-station fairness. The proposed scheme can control the wireless traffic for fairness bandwidth allocation among stations. The bandwidth of each station can be adjusted to minimize the remaining bandwidth. The proposed scheme also covers a method to prevent domination of uplink flow which affects per-station fairness. Furthermore, the proposed scheme can be implemented on wireless access router. Hence, in order to support legacy wireless clients, our solution can be efficiently used. ©2010 IEEE.Publication Metadata only Adsorption of bovine serum albumin (BSA) on polystyrene (PS) and its acid copolymer(2012-01-01) Thidarat Wangkam; Sirasa Yodmongkol; Jarupat Disrattakit; Boonsong Sutapun; Rathasart Amarit; Armote Somboonkaew; Toemsak Srikhirin; Mahidol University; Materials Science and Engineering Programme; Thailand National Electronics and Computer Technology CenterThe effect of surface polarity on the adsorption of bovine serum albumin (BSA) on polystyrene (PS), 7% polystyrene-co-maleic anhydride (7%PSMAn) and 50% polystyrene-co-maleic acid (50%PSMA), at pH 7.4, was investigated. Polystyrene represented the non-polar surface while 7%PSMAn and 50%PSMA represented a low and high acid content copolymer. The amount of the adsorbed BSA depended on the amount of the acid content in the copolymer. BSA formed a monolayer with a side-on orientation on the low polarity PS surface, a mixed side-on and end-on orientation on 7%PSMAn and a predominantly side-on orientation on 50%PSMA. The thickness of adsorbed BSA, measured with an atomic force microscope (AFM), varied from 3 nm to 5 nm for the side-on orientation and from 10 nm to 15 nm for the end-on orientation. The average area occupied per BSA molecule was consistent with the proposed orientation, and was 34.8 nm 2 , 27.8 nm 2 and 18.0 nm 2 for PS, 7%PSMAn and 50%PSMA, respectively. The adsorption showed a concentration dependency following the Freundlich isotherm, which indicated the interactions among adsorbed BSA molecules on the polymer surface. The adsorption took place as an island-like morphology and started to fuse into a patch-like morphology at higher concentrations before achieving a complete monolayer formation. A non-uniform surface coverage and defects were observed in all cases. It is recommended that for an effective blocking of PS, 7%PSMAn and 50%PSMA, the BSA concentration should be higher than 3 mg/mL. © 2011 Elsevier B.V. All rights reserved.Publication Metadata only Advantages of using voiced questionnaire and image capture application for data collection from a minority group in rural areas along the Thailand-Myanmar border(2014-01-01) Siriporn Monyarit; Wirichada Pan-Ngum; Saranath Lawpoolsri; Surapon Yimsamran; Suporn Pongnumkul; Jaranit Kaewkungwal; Pratap Singhasivanon; Mahidol University; Thailand National Electronics and Computer Technology CenterCopyright © 2014 The Author(s). Aims To compare the quality of data collection via electronic data capture (EDC) with voiced questionnaire (QNN) and data image capture features using a tablet versus standard paper-based QNN, to assess the user's perception of using the EDC tool, and to compare user satisfaction with the two methods.Study design Randomised cross-over study.Study sites This study was conducted in two villages along the Thailand-Myanmar border.Methodology This study included 30 community health volunteers (CHVs) and 120 Karen hill tribe villagers. Employing a cross-over study design, the CHVs were allocated randomly to two groups, in which they performed interviews in different sequences using EDC and QNN.Results Data discrepancies were found between the two data-collection methods, when data from the paper-based and image-capture methods were compared, and when conducting skip pattern questions. More than 90% of the CHVs perceived the EDC to be useful and easy to use. Both interviewers and interviewees were more satisfied with the EDC compared with QNN in terms of format, ease of use, and system speed.Conclusion The EDC can effectively be used as an alternative method to paperbased QNNs for data collection. It produces more accurate data that can be considered evidence-based.Publication Metadata only Amperometric acetylcholine biosensor based on graphene-PEDOT:PSS modified electrode(2015-01-01) Piyawat Pitikultham; Chakrit Sriprachuabwong; Pornpimol Sritongkham; Mahidol University; Thailand National Electronics and Computer Technology Center© 2014 IEEE. A promising acetylcholine biosensor based on graphene-PEDOT:PSS (GR-PEDOT:PSS) and bienzyme, choline oxidase (ChOx) and acetylcholine esterase (AChE), modified electrode was successfully fabricated. GR-PEDOT:PSS ink was directly dropped on the screen printed carbon electrode (SPE), and then ChOx and AChE in the optimized loading ratio were immobilized on GR-PEDOT:PSS/SPE by the 10% glutar-aldehyde (GA) vapor cross-linked for 8 minutes. 1% Nafion was coated on the outermost layer of AChE-ChOx/GR-PEDOT:PSS/SPE for performing as a protective film. For amperometric responding, our acetylcholine biosensor showed a low limit detection, high linearity and sensitivity, which were 50 μM, 50 to 250 μM and 486.1 nA/mM, respectively, at -200 mV versus Ag/AgCl reference electrode. Moreover, this biosensor has a simple preparation, low-cost fabrication, and stable detection, thus it is a novel tool for acetylcholine determination.Publication Metadata only Analysis and classification of web proxy logs based on patterns of traffic rates(2015-01-01) Nattapol Kiatkumjounwong; Sudsanguan Ngamsuriyaroj; Anon Plangprasopchok; Apirak Hoonlor; Mahidol University; Thailand National Electronics and Computer Technology Center© 2014 IEEE. Logs are typically used for performing post mortem for abnormal activities. Most Internet service providers keep the history of users' web accesses in terms of proxy logs for investigating a misuse or fraud. However, the majority of the logs represent normal behavior, and no thorough analysis of such logs is usually performed, keeping them on storage would consume very big space. This paper analyzes the characteristics of such logs and classifies them into normal, medium, high and burst rate using five main attributes: IP address, bandwidth, duration, file category, and file type. Our experimental results show different rates for each file type in five popular file categories. The results will be used in classifying web access logs and filtering out abnormal from normal logs so that only abnormal logs are kept for fast investigation.Publication Metadata only Application of surface plasmon resonance biosensor for the detection of Candida albicans(2016-02-01) Sirasa Yodmongkol; Sroisiri Thaweboon; Boonyanit Thaweboon; Chokchai Puttharugsa; Boonsong Sutapun; Ratthasart Amarit; Armote Somboonkaew; Toemsak Srikhirin; Mahidol University; Srinakharinwirot University; Suranaree University of Technology; Thailand National Electronics and Computer Technology Center© 2016 The Japan Society of Applied Physics. In this study, surface plasmon resonance imaging (SPR imaging) was developed for the detection of Candida albicans which is a causal agent of oral infection. The detection was based on the sandwich assay. The capture antibody was covalently immobilized on the mixed self assemble monolayers (SAMs). The ratio of mixed SAMs between 11-mercaptoundecanoic acid and 3-mercaptopropanol was varied to find the optimal ratio for use as a sensor surface. The results showed that the suitable surface for C. albicans detection was SAM of carboxylic (mixed SAMs 1 : 0), even though mixed SAMs 1 : 40 had a high detection signal in comparison to mixed SAMs 1 : 0, but the non-specific signal was higher. The detection limit was 107cells/ml for direct detection, and was increased to 106cells/ml with sandwich antibody. The use of polyclonal C. albicans antibody as capture and sandwich antibody showed good selectivity against the relevant oral bacteria including Escherichia coli, Streptococcus mutan, Staphylococcus aureus, β-streptococci, and Lactobacillus casei. SPR platform in this study could detect C. albicans from the mixed microbial suspension without requirement of skillful technician. This SPR imaging biosensor could be applied for Candida identification after cultivation.Publication Metadata only Application of Wavelet Transform to identify motor unit recruitment pattern(2010-12-01) Ninlawan Paobthong; Rumpa Boonsinsukh; Vitoon Saengsirisuwan; Sirod Sirisup; Mahidol University; Srinakharinwirot University; Thailand National Electronics and Computer Technology CenterMotor unit recruitment pattern represents the time-frequency characteristics of muscle contraction. The Continuous Wavelet Transform (CWT) is a time-frequency signal analysis but its ability to identify motor unit recruitment pattern is still unclear. The purpose of this study was to validate the CWT in identifying the differences in motor unit recruitment pattern, regarding time-space domains, between young and elderly healthy subjects during maximum voluntary knee extension. Ten elderly and 10 young subjects participated in this study. They were asked to perform isometric knee extension at 100% maximum voluntary contraction for 10 seconds. CWT analysis was presented as scalogram. Results showed that the presence of red color spectrum in the young subjects was less than that in the elderly group, indicating that the major recruitments occur more frequently in the elderly. When considering the neuronal firing frequency, the elderly subject operates the firing frequency at a lower range than the young group. The findings in this study confirmed that the CWT can be used to identify the age-related changes in motor unit recruitment pattern. © 2010 IEEE.Publication Metadata only Assessment of the accuracy and reliability of cephsmile v.2 in cephalograms and model measurements(2012-02-20) Orrathai Watcharinporn; Surachai Dechkunakorn; Niwat Anuwongnukroh; Chanjira Sinthanayothin; Peerapong Santiwong; Wisarut Bholsithi; Wanna Suchato; Mahidol University; Thailand National Electronics and Computer Technology CenterObjective: The study compared the measurement values from lateral cephalometric analysis, postero-anterior cephalometric analysis and study models between CephSmile version 2.0 and hand-traced method. Materials and Methods: Thirty sets of digital lateral, postero-anterior cephalograms and plaster models were selected randomly, uploaded and measured with CephSmile version 2.0 Program. All dental measurements were compared with manual measurements. Manual cephalometic measurements were obtained with a cepholomatic protractor and model measurements with vernier calipers. Both groups were assessed for accuracy and reliability. Mean and SD were calculated using SPSS version 11.0. Results: All CephSmile and hand-traced radiograph coefficients of variation were less than 0.10 suggesting high interexaminer reliability. No significant differences were found comparing lateral cephalograms, postero-anterior cephalograms, and plaster models between manual measurements and CephSmile Program version 2.0. Conclusion: CephSmile Software version 2.0 is as accurate and reliable as manual measurements for cephalometric analysis in orthodontic clinical treatment and planning. © 2012 Springer-Verlag GmbH.Publication Metadata only Bibliometrics and social network analysis supporting the research development of emerging areas: Case studies from Thailand(2018-01-22) Nathasit Gerdsri; Alisa Kongthon; Mahidol University; Thailand National Electronics and Computer Technology Center© 2018 by World Scientific Publishing Europe Ltd. All rights reserved. This chapter focuses on applying bibliometric analysis and text mining technique to generate technology intelligence from publication databases. The intelligence represents the research profile and landscape by highlighting active research areas and revealing professional communities along with their social networks. Professional communities are both hidden and promoted. In developing countries, such as Thailand in particular, the number of experts in science and technology is quite limited. The mobility of talent between academia, government, and industry is therefore essential for knowledge transfer and technology diffusion. The main challenge is how to identify the potential groups of experts leading to future research collaboration. In this chapter, the case analysis of two emerging research areas in Thailand are presented; Biomedical Engineering (BME) and Data Science. The findings are used as key inputs for the development of effective policies and incentives to promote the research activities as well as research collaboration among different groups of experts.Publication Metadata only Blue photoluminescent carbon nanodots from limeade(2016-12-01) Phitsini Suvarnaphaet; Chandra Sekhar Tiwary; Jutaphet Wetcharungsri; Supanit Porntheeraphat; Rassmidara Hoonsawat; Pulickel Madhavapanicker Ajayan; I. Ming Tang; Piyapong Asanithi; Mahidol University; Rice University; Thailand National Electronics and Computer Technology Center; Kasetsart University; King Mongkut s University of Technology Thonburi; Commission of Higher Education© 2016 Elsevier B.V. Carbon-based photoluminescent nanodot has currently been one of the promising materials for various applications. The remaining challenges are the carbon sources and the simple synthetic processes that enhance the quantum yield, photostability and biocompatibility of the nanodots. In this work, the synthesis of blue photoluminescent carbon nanodots from limeade via a single-step hydrothermal carbonization process is presented. Lime carbon nanodot (L-CnD), whose the quantum yield exceeding 50% for the 490 nm emission in gram-scale amounts, has the structure of graphene core functionalized with the oxygen functional groups. The micron-sized flake of the as-prepared L-CnD powder exhibits multicolor emission depending on an excitation wavelength. The L-CnDs are demonstrated for rapidly ferric-ion (Fe3 +) detection in water compared to Fe2 +, Cu2 +, Co2 +, Zn2 +, Mn2 + and Ni2 + ions. The photoluminescence quenching of L-CnD solution under UV light is used to distinguish the Fe3 + ions from others by naked eyes as low concentration as 100 μM. Additionally, L-CnDs provide exceptional photostability and biocompatibility for imaging yeast cell morphology. Changes in morphology of living yeast cells, i.e. cell shape variation, and budding, can be observed in a minute-period until more than an hour without the photoluminescent intensity loss.Publication Metadata only Boronic acid Functionalized Guided Mode Resonance Sensor for HbA1c Detection(2019-01-10) Boonrasri Seeleang; Songpol Ongwattanakul; Chamras Promptmas; Sakoolkan Boonruang; Waleed S. Mohammed; Romuald Jolivot; Mahidol University; Bangkok University; Thailand National Electronics and Computer Technology Center© 2018 IEEE. An alternative optical label-free sensor, Guided Mode Resonance (GMR), is demonstrated in this paper for detection of glycated hemoglobin (HbA1c). The GMR sensor surface is modified by cross-linking with 3-amino phenylboronic acids (3-APBA) using 3-(glycidyloxypropyl) trimethoxysilane (GOPTMS). 3-APBA provides a specific interaction with HbA1c under alkaline condition. The sensing scheme is performed by tracking a peak resonance in a reflection spectrum. That relies on changes in refractive index on the sensor's surface. Percent of HbA1c in total hemoglobin can be estimated using a ration of resonance shift due to absorbed HbA1c and the shift from changes in a bulk refractive index of a whole blood (Δλ HbA1c /Δλ TotalHb ). In the measurement, Lypochek diabetes controls having 5.1% (range: 4.6-5.6% measured by HPLC) and 9.5% (range: 8.5-10.4% measured by HPLC) HbA1c are used. The results from a resonance shift ration is linearly proportional to the measurement from the HPLC standard method with a precision of 7.71-20.77% CV. This guarantees boronate-modified GMR affinity sensor for the monitoring of glycemic status in diabetes management.Publication Metadata only Carbon doped tungsten oxide nanorods NO2sensor prepared by glancing angle RF sputtering(2013-03-25) Chatchawal Wongchoosuk; Anurat Wisitsoraat; Ditsayut Phokharatkul; Mati Horprathum; Adisorn Tuantranont; Teerakiat Kerdcharoen; Kasetsart University; Thailand National Electronics and Computer Technology Center; Mahidol UniversityMetal oxide semiconductor nanostructures offer potential advantages in sensing applications due to their large surface to volume ratio, lower electron recombination rate, and high stability. However, most methods produce nanostructures with random sizes, distribution and orientations, which are not reliable for practical applications because of poor reproducibility. In this work, homogeneous carbon-doped WO3nanorods are developed based on the glancing angle deposition (GLAD) technique using radio-frequency magnetron sputtering and investigated for NO2gas sensing application. The carbon doping is achieved by using acetylene gas as a carbon source. Characterization based on scanning electron microscopy, Auger electron spectroscopy and X-ray diffraction confirm the formation of uniform carbon-doped crystalline WO3nanorods. The gas-sensing results reveal that carbon-doped WO3nanorods sensor exhibits not only high response and selectivity to NO2(0.5-5 ppm) but also at low operating temperature (150 °C) compared with the undoped ones. The observed gas-sensing enhancement may be attributed to the increase of specific surface area and the decrease of activation energy by carbon doping. © 2013 Elsevier B.V.Publication Metadata only Cholesterol biosensor based on direct electron transfer of cholesterol oxidase on multi-wall carbon nanotubes(2011-12-01) Saithip Pakapongpan; Adisorn Tuantranont; Pornpimol Sritongkham; Thailand National Electronics and Computer Technology Center; Mahidol UniversityCholesterol biosensor based on direct electron of cholesterol oxidase(ChOx) covalently funtionalized on multi-wall carbon nanotubes(MWNTs) modified screen printed electrode(SPE) was studied. The MWNTs/ChOx/SPE has been characterized using electrochemical method including cyclic voltammetry and amperometry. Carbon Nanotubes can improve the direct electron transfer of ChOx and the electrode surface. This biosensor has good electrochemical behaviour and stability. In addition, the interferences compound in real sample such as ascorbic acid (AA), uric acid (UA), 4-acetamidophenol (AP), etc. did not cause any interference of this biosensor due to the use of a low potential from direct electron transfer of ChOx which is -0.4 V. © 2011 IEEE.Publication Metadata only Comparison of digitized images for cephalometric analysis from scanner and digital cameras(2011-09-23) Niwat Anuwongnukroh; Surachai Dechkunakorn; Chanjira Sinthanayothin; Lada Shinawatra.; Mahidol University; Thailand National Electronics and Computer Technology CenterObjective: The aim of the study was to compare the manual tracing of lateral cephalometric radiographs with the use of cephalometric software obtained by 2 methods: use of a scanner and use of cameras to test the accuracy of measurement for clinical orthodontic diagnosis. Material and Methods: The original method of manual tracing was compared to 2 radiographic digitization methods: A) captured from a scanner, B) captured from digital cameras applied to 40 randomly selected cephalograms of orthodontic patients at Mahidol University. The digital images from cameras and scanner were analyzed with image processing software (CephSmile). The repeatability test was obtained for all methods, and the paired t-test determined the statistical significance between digitized images and original manual tracings for thirty-four measurements. Results: The paired t-test showed no significant differences among all 34 variables. Most mean differences were less than 0.25 mm and 0.25 degrees. Conclusion: The results demonstrated that there were no significant differences on measurement parameters for cephalometric analysis among manual tracing and computerized digital images from scanner and cameras. © (2011) Trans Tech Publications.Publication Metadata only Cross-layer based adaptive wireless traffic control for per-flow and per-station fairness(2011-12-01) Vasaka Visoottiviseth; Akkasit Trunganont; Siwaruk Siwamogsatham; Mahidol University; Thailand National Electronics and Computer Technology Center© 2011, Visoottiviseth et al; licensee Springer. In the IEEE 802.11 wireless LANs, the bandwidth is not fairly shared among stations due to the distributed coordination function (DCF) mechanism in the IEEE 802.11 MAC protocol. It introduces the per-flow and per-station unfairness problems between uplink and downlink flows, as the uplink flows usually dominate the downlink flows. In addition, some users may use greedy applications such as video streaming, which may prevent other applications from connecting to the Internet. In this article, we propose an adaptive cross-layer bandwidth allocation mechanism to provide per-station and per-flow fairness. To verify the effectiveness and scalability, our scheme is implemented on a wireless access router and numerous experiments in a typical wireless environment with both TCP and UDP traffic are conducted to evaluate performance of the proposed scheme.Publication Metadata only DAA: Distributed address auto-configuration for mobile ad hoc networks(2011-07-21) Vasaka Visoottiviseth; Chaiwat Yanprasop; Panita Pongpaibool; Mahidol University; Thailand National Electronics and Computer Technology CenterWe implement a new IP address auto-configuration mechanism for MANET. The proposed mechanism lets any nodes in a MANET distribute address pools to a new node. The proposed algorithm can guarantee address uniqueness and achieve fast address assignment. The protocol is implemented on the Optimized Link State Routing protocol and supports both IPv4 and IPv6. This paper extends the previous work [6] by providing reliability, optimizing the codes and validating the protocol performance with more experiments and more nodes on the real wireless testbed. We also discuss concerns about security vulnerabilities of this proposed protocol. © 2011 IEEE.
