Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597915
S. Prakash, P. Abshire
We describe a CMOS capacitance sensor for measuring the capacitive behavior of living cells in a culture environment, in the presence of weak electric fields. The underlying physical phenomenon results primarily from polarization of the ionic cloud surrounding the cell in aqueous medium. The measured capacitance depends on a variety of factors including cell morphology, membrane integrity, medium pH and extra cellular ionic concentration and serves as an indicator of cell health. The capacitance sensor uses the principle of charge sharing and maps sensed capacitance values to voltages. The sensor chip has been fabricated in a commercially available 0.5 mum, 2-poly 3-metal CMOS technology. The sensors have been successfully used for long term monitoring of cell viability in vitro
{"title":"A CMOS capacitance sensor that monitors cell viability","authors":"S. Prakash, P. Abshire","doi":"10.1109/ICSENS.2005.1597915","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597915","url":null,"abstract":"We describe a CMOS capacitance sensor for measuring the capacitive behavior of living cells in a culture environment, in the presence of weak electric fields. The underlying physical phenomenon results primarily from polarization of the ionic cloud surrounding the cell in aqueous medium. The measured capacitance depends on a variety of factors including cell morphology, membrane integrity, medium pH and extra cellular ionic concentration and serves as an indicator of cell health. The capacitance sensor uses the principle of charge sharing and maps sensed capacitance values to voltages. The sensor chip has been fabricated in a commercially available 0.5 mum, 2-poly 3-metal CMOS technology. The sensors have been successfully used for long term monitoring of cell viability in vitro","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"154 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124291846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597718
T. Nakamoto, Y. Hirota, J. Ide
Although GC/MS is a standard technique to analyze gases, a combination of mass spectrometry with a pattern recognition technique enables us to evaluate smells rapidly because lengthy measurement of gas chromatography is eliminated. Although several researchers have reported the classification of smells only using mass spectrometry, the estimation of the sensory-test result has not been studied. A neural network enables us to map the mass spectrum into the human sensory space. In this study, mint flavors were focused on. Four spearmint flavors and their mixtures were successfully separated and quantified only using the mass spectrum. Then, the mixtures of those flavors and peppermint flavor were evaluated. The scores of the sensory test such as QDA (quantitative descriptive analysis) method were estimated using the mass spectrometry and SOM (self-organized map). It was found that the accuracy of the estimated value using the SOM was better than that obtained according to the linear superposition theorem
{"title":"Record of mint flavor using mass spectrometry","authors":"T. Nakamoto, Y. Hirota, J. Ide","doi":"10.1109/ICSENS.2005.1597718","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597718","url":null,"abstract":"Although GC/MS is a standard technique to analyze gases, a combination of mass spectrometry with a pattern recognition technique enables us to evaluate smells rapidly because lengthy measurement of gas chromatography is eliminated. Although several researchers have reported the classification of smells only using mass spectrometry, the estimation of the sensory-test result has not been studied. A neural network enables us to map the mass spectrum into the human sensory space. In this study, mint flavors were focused on. Four spearmint flavors and their mixtures were successfully separated and quantified only using the mass spectrum. Then, the mixtures of those flavors and peppermint flavor were evaluated. The scores of the sensory test such as QDA (quantitative descriptive analysis) method were estimated using the mass spectrometry and SOM (self-organized map). It was found that the accuracy of the estimated value using the SOM was better than that obtained according to the linear superposition theorem","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125802818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597831
A. Goyal, P. Joshi, S. Tadigadapa, A. Gupta, P. Eklund
Single walled carbon nanotubes (SWNTs) are reservoirs of gases as they can adsorb on their walls as well as retain gas molecules in their hollow cylindrical interior. This has important applications for example in fuel cell technology for hydrogen storage, as a gas sensor for realization of artificial nose, etc. Storage of gases by carbon nanotubes have been recently investigated by monitoring changes in their thermoelectric power and electrical resistivity due to their interaction with gas molecules. In this paper we present a gravimetric study of interaction of gas molecules with isolated SWNTs using a micromachined ultrasensitive quartz crystal microbalance (QCM). The adsorption and desorption of gas molecules with different molecular weights from carbon nanotubes revealed that changes in resonance frequency and quality factor of the resonating crystal scale as approximately M0.45, where M is the mass the of the gas molecule as compared to M1/3 dependence observed in case of changes in thermoelectric power and electrical resistance for thin films of the carbon nanotubes. The use of QCM enables room temperature probing of gas interaction with isolated single walled carbon nanotubes. Specific interaction of gases with carbon nanotubes on QCM provides potential application of the device as a gas sensor
{"title":"Micromachined quartz resonator functionalized with single walled carbon nanotubes","authors":"A. Goyal, P. Joshi, S. Tadigadapa, A. Gupta, P. Eklund","doi":"10.1109/ICSENS.2005.1597831","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597831","url":null,"abstract":"Single walled carbon nanotubes (SWNTs) are reservoirs of gases as they can adsorb on their walls as well as retain gas molecules in their hollow cylindrical interior. This has important applications for example in fuel cell technology for hydrogen storage, as a gas sensor for realization of artificial nose, etc. Storage of gases by carbon nanotubes have been recently investigated by monitoring changes in their thermoelectric power and electrical resistivity due to their interaction with gas molecules. In this paper we present a gravimetric study of interaction of gas molecules with isolated SWNTs using a micromachined ultrasensitive quartz crystal microbalance (QCM). The adsorption and desorption of gas molecules with different molecular weights from carbon nanotubes revealed that changes in resonance frequency and quality factor of the resonating crystal scale as approximately M0.45, where M is the mass the of the gas molecule as compared to M1/3 dependence observed in case of changes in thermoelectric power and electrical resistance for thin films of the carbon nanotubes. The use of QCM enables room temperature probing of gas interaction with isolated single walled carbon nanotubes. Specific interaction of gases with carbon nanotubes on QCM provides potential application of the device as a gas sensor","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125872576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597885
K. Hou, Chih-Hsiung Shen
In this paper, a novel architecture of a thermopile array imager for high speed target's position identification is presented. The sensor array fully integrated in CMOS standard technology, features pixel access and in a particular topology also position detection. According to the description given, with larger absorbing area of floating membrane and therefore less thermal conductance per pixel, is used for the quick estimation of the rough values for spot position and intensity. The winner-take-all (WTA) circuit is used in combination with readout circuit for determining which of the 16 times 16 pixels have received the largest amount of infrared radiation. It is a parallel structure of 16 times 16 cells connected to a common control line. The results obtained so far have shown that integrated thermopile array have reached a high level of development and reliability that are suited for high accuracy infrared tracking applications
{"title":"A new architecture of thermopiles array with WTA implementation","authors":"K. Hou, Chih-Hsiung Shen","doi":"10.1109/ICSENS.2005.1597885","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597885","url":null,"abstract":"In this paper, a novel architecture of a thermopile array imager for high speed target's position identification is presented. The sensor array fully integrated in CMOS standard technology, features pixel access and in a particular topology also position detection. According to the description given, with larger absorbing area of floating membrane and therefore less thermal conductance per pixel, is used for the quick estimation of the rough values for spot position and intensity. The winner-take-all (WTA) circuit is used in combination with readout circuit for determining which of the 16 times 16 pixels have received the largest amount of infrared radiation. It is a parallel structure of 16 times 16 cells connected to a common control line. The results obtained so far have shown that integrated thermopile array have reached a high level of development and reliability that are suited for high accuracy infrared tracking applications","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129382119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597910
M. Hofmann, R. Schlierf, W. Mokwa, U. Schnakenberg, F. Kensy, J. Buchs
A flew method for measuring the impedance spectra of biological cell cultures in microtiter plates (MTP) is proposed. The application offers the opportunity of measuring the complex impedance of aqueous solutions without galvanic contact. A thin polyimide film is used as dielectric layer between two metal electrodes and the solutions. The impedance of these cells or aqueous solutions is determined by measuring the impedance of the whole application and subtracting the constant capacitance of the dielectric layer. This calculation is based on a newly developed equivalent electrical circuit. To show the applicability of the sensor, yeast cells (Hansenula polymorpha wt) are monitored at frequencies between 500 kHz and 15 MHz. The results demonstrate the ability of the sensor to measure even the relaxation step of the capacitance of living cells. Because of possible side effects, the influence of aqueous solutions on the polyimide film in general is investigated as well
{"title":"Galvanically decoupled impedance spectroscopy for biological high-throughput-screening in microtiter plates","authors":"M. Hofmann, R. Schlierf, W. Mokwa, U. Schnakenberg, F. Kensy, J. Buchs","doi":"10.1109/ICSENS.2005.1597910","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597910","url":null,"abstract":"A flew method for measuring the impedance spectra of biological cell cultures in microtiter plates (MTP) is proposed. The application offers the opportunity of measuring the complex impedance of aqueous solutions without galvanic contact. A thin polyimide film is used as dielectric layer between two metal electrodes and the solutions. The impedance of these cells or aqueous solutions is determined by measuring the impedance of the whole application and subtracting the constant capacitance of the dielectric layer. This calculation is based on a newly developed equivalent electrical circuit. To show the applicability of the sensor, yeast cells (Hansenula polymorpha wt) are monitored at frequencies between 500 kHz and 15 MHz. The results demonstrate the ability of the sensor to measure even the relaxation step of the capacitance of living cells. Because of possible side effects, the influence of aqueous solutions on the polyimide film in general is investigated as well","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130561407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597811
J. Spannhake, O. Schulz, A. Helwig, G. Miiller, T. Doll
Miniaturized non-dispersive infrared (NDIR) gas sensing systems require as key components bright thermal infrared (IR) sources that can be modulated at reasonably high speed to allow high-sensitivity lock-in detection to be applied. In addition such sources should provide a stable emission naffected by both short-term environmental changes as well as long-term drift. As miniaturized light bulbs, widely used in commercial NDIR gas sensing systems, cannot fulfil these requirements we have developed miniaturized thermal IR emitters with built-in monitoring and self-test features
{"title":"Design, development and operational concept of an advanced MEMS IR source for miniaturized gas sensor systems","authors":"J. Spannhake, O. Schulz, A. Helwig, G. Miiller, T. Doll","doi":"10.1109/ICSENS.2005.1597811","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597811","url":null,"abstract":"Miniaturized non-dispersive infrared (NDIR) gas sensing systems require as key components bright thermal infrared (IR) sources that can be modulated at reasonably high speed to allow high-sensitivity lock-in detection to be applied. In addition such sources should provide a stable emission naffected by both short-term environmental changes as well as long-term drift. As miniaturized light bulbs, widely used in commercial NDIR gas sensing systems, cannot fulfil these requirements we have developed miniaturized thermal IR emitters with built-in monitoring and self-test features","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121652236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597905
S. Moon, Y. Han, Kuntae Kim, Seunghun Lee, H. Shin
In this work, high-performance uncooled microbolometer was fabricated by using vanadium tungsten oxide as a infrared-sensitive material and its bolometric properties was characterized. As a bolometric material, the optimized V0.95W0.05Ox thin film has a high TCR value over - 3.0%/K and low noise properties compared with VOx thin film. The fabricated V0.95W0.05Ox-based microbolometer was vacuum-packaged and equipped with thermal electric cooler for the measurement of bolometric properties. The TCR value of the fabricated device was -3.49%/K at room temperature resistance of 71 kOmega and the measured thermal conductance was 6.1times10-7 W/K. Finally, we obtained high responsivity over 1.8times104 W/K and high detectivity over 1.3times109 cmHzfrac12/W at a chopper frequency of 10 Hz and a bias current of 7.4 muA
{"title":"Enhanced Characteristics of V0.95W0.05OX-Based Uncooled Microbolometer","authors":"S. Moon, Y. Han, Kuntae Kim, Seunghun Lee, H. Shin","doi":"10.1109/ICSENS.2005.1597905","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597905","url":null,"abstract":"In this work, high-performance uncooled microbolometer was fabricated by using vanadium tungsten oxide as a infrared-sensitive material and its bolometric properties was characterized. As a bolometric material, the optimized V<sub>0.95</sub>W<sub>0.05</sub>O<sub>x</sub> thin film has a high TCR value over - 3.0%/K and low noise properties compared with VOx thin film. The fabricated V<sub>0.95</sub>W<sub>0.05</sub>O<sub>x</sub>-based microbolometer was vacuum-packaged and equipped with thermal electric cooler for the measurement of bolometric properties. The TCR value of the fabricated device was -3.49%/K at room temperature resistance of 71 kOmega and the measured thermal conductance was 6.1times10<sup>-7 </sup> W/K. Finally, we obtained high responsivity over 1.8times10<sup>4</sup> W/K and high detectivity over 1.3times10<sup>9</sup> cmHz<sup>frac12</sup>/W at a chopper frequency of 10 Hz and a bias current of 7.4 muA","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116309611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597765
B. Bahreyni, C. Shafai
A novel design of a resonant magnetic field sensor and complete modeling of its behavior are presented along with a description of the experimental set up and results. The sensor output is a shift in frequency, which is robust against interference and easy to be read by digital systems. An analytic model is derived for the sensor behavior using novel and existing techniques. This model takes advantage of the ability of Dunkerley's method to model complex structures. Devices were fabricated in an SOI bulk micromachining process. Experimental results for the performance of the devices are in good agreement with modeling predictions. The minimum detected field is 80muT with simple electronics. However, the theoretical minimum detectable signal for different devices is on the order of 10's of nano-teslas at 1Torr measured with a noiseless spectrum analyzer with a 100Hz bandwidth. This level of sensitivity is a consequence of the frequency modulation of the output signal
{"title":"A micromachined magnetometer with frequency modulation at the output","authors":"B. Bahreyni, C. Shafai","doi":"10.1109/ICSENS.2005.1597765","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597765","url":null,"abstract":"A novel design of a resonant magnetic field sensor and complete modeling of its behavior are presented along with a description of the experimental set up and results. The sensor output is a shift in frequency, which is robust against interference and easy to be read by digital systems. An analytic model is derived for the sensor behavior using novel and existing techniques. This model takes advantage of the ability of Dunkerley's method to model complex structures. Devices were fabricated in an SOI bulk micromachining process. Experimental results for the performance of the devices are in good agreement with modeling predictions. The minimum detected field is 80muT with simple electronics. However, the theoretical minimum detectable signal for different devices is on the order of 10's of nano-teslas at 1Torr measured with a noiseless spectrum analyzer with a 100Hz bandwidth. This level of sensitivity is a consequence of the frequency modulation of the output signal","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126365600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597921
A. Kolmakov, Dmitri O. Klenov, Y. Lilach, S. Stemmer, M. Moskovits
We have developed the technique for in situ monitoring of the process of surface functionalization of the pre-selected 1-D nanostructure with catalytic particles of Pd. The method allows us to compare directly the sensing performance of the individual SnO2 nanobelt chemical sensor before and after surface sensitization. The conductance evolution at early stages of the metal deposition before percolation indicates that Pd nanoparticles formed on the nanowire surface induce regions depleted with electrons which narrow the effective conduction channel and therefore are responsible for the conductance drop. After being functionalized with Pd the nanostructure exhibited drastic improvement of the sensitivity toward oxygen and hydrogen due to enhanced activation of molecules on Pd nanoparticle surface and diffusion of resultant reactive species to the oxide surface
{"title":"Surface sensitization of metal oxide quasi-1D sensors: in situ comparative study of pristine and Pd doped individual SnO/sub 2/ nanostructure","authors":"A. Kolmakov, Dmitri O. Klenov, Y. Lilach, S. Stemmer, M. Moskovits","doi":"10.1109/ICSENS.2005.1597921","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597921","url":null,"abstract":"We have developed the technique for in situ monitoring of the process of surface functionalization of the pre-selected 1-D nanostructure with catalytic particles of Pd. The method allows us to compare directly the sensing performance of the individual SnO2 nanobelt chemical sensor before and after surface sensitization. The conductance evolution at early stages of the metal deposition before percolation indicates that Pd nanoparticles formed on the nanowire surface induce regions depleted with electrons which narrow the effective conduction channel and therefore are responsible for the conductance drop. After being functionalized with Pd the nanostructure exhibited drastic improvement of the sensitivity toward oxygen and hydrogen due to enhanced activation of molecules on Pd nanoparticle surface and diffusion of resultant reactive species to the oxide surface","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"54 51","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120813940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-10-31DOI: 10.1109/ICSENS.2005.1597764
F. Koushanfar, M. Potkonjak
We have developed Markov chain-based techniques for infield modeling the missing and faulty data for the widely used MICA2 sensor motes. These models help designers of sensor nodes and sensor networks to gain insights into the behavior of any particular sensor platform. The models also enable users of sensor networks to collect high integrity data from the deployed networks in a more efficient and reliable way. The new approach for development and validation of faults and missing data has two phases. In the first phase, we conduct exploratory analysis of data traces collected from the deployed sensor networks. In the second phase, we use the density estimation-based procedure to derive semi Markov models that best capture the patterns and statistics of missing and faulty data in the analyzed sensor data streams. We have applied the fault detection and missing data modeling procedure on light, temperature and humidity sensors on MICA2 motes in sensor networks deployed in office space and natural habitats. The technical highlight of the research presented in this paper include: (i) exploratory data analysis and studying the properties of the sensor data streams; and (ii) adoption of a new class of semi Markov-chain models for capturing and predicting missing and faulty data in actual data trace streams
{"title":"Markov chain-based models for missing and faulty data in MICA2 sensor motes","authors":"F. Koushanfar, M. Potkonjak","doi":"10.1109/ICSENS.2005.1597764","DOIUrl":"https://doi.org/10.1109/ICSENS.2005.1597764","url":null,"abstract":"We have developed Markov chain-based techniques for infield modeling the missing and faulty data for the widely used MICA2 sensor motes. These models help designers of sensor nodes and sensor networks to gain insights into the behavior of any particular sensor platform. The models also enable users of sensor networks to collect high integrity data from the deployed networks in a more efficient and reliable way. The new approach for development and validation of faults and missing data has two phases. In the first phase, we conduct exploratory analysis of data traces collected from the deployed sensor networks. In the second phase, we use the density estimation-based procedure to derive semi Markov models that best capture the patterns and statistics of missing and faulty data in the analyzed sensor data streams. We have applied the fault detection and missing data modeling procedure on light, temperature and humidity sensors on MICA2 motes in sensor networks deployed in office space and natural habitats. The technical highlight of the research presented in this paper include: (i) exploratory data analysis and studying the properties of the sensor data streams; and (ii) adoption of a new class of semi Markov-chain models for capturing and predicting missing and faulty data in actual data trace streams","PeriodicalId":119985,"journal":{"name":"IEEE Sensors, 2005.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120963210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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