Pub Date : 2017-06-15DOI: 10.1109/IWASI.2017.7974204
S. Stramaglia, I. Bassez, L. Faes, Daniele Marinazzo
Since interactions in neural systems occur across multiple temporal scales, it is likely that information flow will exhibit a multiscale structure, thus requiring a multiscale generalization of classical causality analysis like Granger's approach. However, the computation of multiscale measures of information dynamics is complicated by theoretical and practical issues such as filtering and undersampling: to overcome these problems, we propose a wavelet-based approach for multiscale Granger causality analysis, which is characterized by the following properties: (i) only the candidate driver variable is wavelet transformed (ii) the decomposition is performed using the à trous wavelet transform with cubic B-spline filter. We measure the causality, at a given scale, by including the wavelet coefficients of the driver times series, at that scale, in the regression model of the target. To validate our method, we apply it to public scalp EEG signals, and we find that the condition of closed eyes, at rest, is characterized by an enhanced Granger causality among channels at slow scales w.r.t. eye open condition, whilst the standard Granger causality is not significantly different in the two conditions.
{"title":"Multiscale Granger causality analysis by à trous wavelet transform","authors":"S. Stramaglia, I. Bassez, L. Faes, Daniele Marinazzo","doi":"10.1109/IWASI.2017.7974204","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974204","url":null,"abstract":"Since interactions in neural systems occur across multiple temporal scales, it is likely that information flow will exhibit a multiscale structure, thus requiring a multiscale generalization of classical causality analysis like Granger's approach. However, the computation of multiscale measures of information dynamics is complicated by theoretical and practical issues such as filtering and undersampling: to overcome these problems, we propose a wavelet-based approach for multiscale Granger causality analysis, which is characterized by the following properties: (i) only the candidate driver variable is wavelet transformed (ii) the decomposition is performed using the à trous wavelet transform with cubic B-spline filter. We measure the causality, at a given scale, by including the wavelet coefficients of the driver times series, at that scale, in the regression model of the target. To validate our method, we apply it to public scalp EEG signals, and we find that the condition of closed eyes, at rest, is characterized by an enhanced Granger causality among channels at slow scales w.r.t. eye open condition, whilst the standard Granger causality is not significantly different in the two conditions.","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121473048","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 : 2017-06-15DOI: 10.1109/IWASI.2017.7974261
F. Criscuolo, I. Taurino, Tugba Kilic, S. Carrara, G. Micheli
The Hemolytic Disease of the Fetus and Newborn (HDFN), if untreated, can have severe consequences on baby's health, eventually causing death. Prevention and diagnosis of pregnancies at risk of HDFN consists in quantitative analysis in hospital every 2–4 weeks of blood group antibodies in maternal serum. The most important antibodies to be monitored are anti-Rhesus D (or anti-RhD) ones. Nowadays several portable systems for different healthcare applications have been developed towards decentralization of diagnosis thanks to the enormous advances in electrochemical biosensing. Home-monitoring of pregnancies at risk of HDFN could significantly improve patients' life quality. Here we demonstrate for the first time label-free quantitative detection of anti-RhD antibodies by means of electrochemical impedance spectroscopy (EIS), suitable for integration within a complete portable device. The specificity of the sensor was also proved.
{"title":"An electrochemical sensor for quantitative analysis of Rhesus D antibodies in blood","authors":"F. Criscuolo, I. Taurino, Tugba Kilic, S. Carrara, G. Micheli","doi":"10.1109/IWASI.2017.7974261","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974261","url":null,"abstract":"The Hemolytic Disease of the Fetus and Newborn (HDFN), if untreated, can have severe consequences on baby's health, eventually causing death. Prevention and diagnosis of pregnancies at risk of HDFN consists in quantitative analysis in hospital every 2–4 weeks of blood group antibodies in maternal serum. The most important antibodies to be monitored are anti-Rhesus D (or anti-RhD) ones. Nowadays several portable systems for different healthcare applications have been developed towards decentralization of diagnosis thanks to the enormous advances in electrochemical biosensing. Home-monitoring of pregnancies at risk of HDFN could significantly improve patients' life quality. Here we demonstrate for the first time label-free quantitative detection of anti-RhD antibodies by means of electrochemical impedance spectroscopy (EIS), suitable for integration within a complete portable device. The specificity of the sensor was also proved.","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130809005","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 : 2017-06-15DOI: 10.1109/IWASI.2017.7974229
M. Rossi, M. Nardello, L. Lorenzelli, D. Brunelli
In this work we present an electronic system to simultaneously measure dynamic and static normal pressure at the interface between prosthetic limbs and the patient's body. Monitoring the contact forces that occur in between prosthesis's sockets and residual limb is crucial to ease their customization process and eventually to reduce the pain and the stress for the amputee. We propose a novel sensing unit design that jointly exploits piezo-electric and piezo-resistive technologies to detect and to discriminate dynamic and static stimuli. A dedicated and digitally configurable electronic interface has been designed to interface the sensing unit with any microcontroller.
{"title":"Dual mode pressure sensing for prosthetic interfaces","authors":"M. Rossi, M. Nardello, L. Lorenzelli, D. Brunelli","doi":"10.1109/IWASI.2017.7974229","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974229","url":null,"abstract":"In this work we present an electronic system to simultaneously measure dynamic and static normal pressure at the interface between prosthetic limbs and the patient's body. Monitoring the contact forces that occur in between prosthesis's sockets and residual limb is crucial to ease their customization process and eventually to reduce the pain and the stress for the amputee. We propose a novel sensing unit design that jointly exploits piezo-electric and piezo-resistive technologies to detect and to discriminate dynamic and static stimuli. A dedicated and digitally configurable electronic interface has been designed to interface the sensing unit with any microcontroller.","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128972231","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 : 2017-06-01DOI: 10.1109/IWASI.2017.7974241
F. Dell’Olio, G. Brunetti, D. Conteduca, N. Sasanelli, C. Ciminelli, M. Armenise
Planar photonic gyros have a crucial enabling role in many areas of spacecraft engineering, due to their important characteristics, such as small size and weight, reduced driving power and high reliability and overall performance. For these reasons, they are currently the topic of a quickly increasing research effort. This effort is critically reviewed in this paper where the new patented concept of miniaturized photonic gyro based on a Bragg grating ring resonator, where a 1D photonic crystal is included in the circular resonant path, is also briefly discussed.
{"title":"Planar photonic gyroscopes for satellite attitude control","authors":"F. Dell’Olio, G. Brunetti, D. Conteduca, N. Sasanelli, C. Ciminelli, M. Armenise","doi":"10.1109/IWASI.2017.7974241","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974241","url":null,"abstract":"Planar photonic gyros have a crucial enabling role in many areas of spacecraft engineering, due to their important characteristics, such as small size and weight, reduced driving power and high reliability and overall performance. For these reasons, they are currently the topic of a quickly increasing research effort. This effort is critically reviewed in this paper where the new patented concept of miniaturized photonic gyro based on a Bragg grating ring resonator, where a 1D photonic crystal is included in the circular resonant path, is also briefly discussed.","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114280270","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 : 2017-06-01DOI: 10.1109/IWASI.2017.7974265
D. Caputo, A. Nascetti, C. Fanelli, G. Cesare, R. Scipinotti, A. Ricelli
In this paper, we report on the design, fabrication and characterization of a low cost, portable detection system able to quantify, in a rapid and reliable way, the contamination level of Ochratoxin A (OTA) in red wine. The operating principle is the real-time monitoring of the natural fluorescence of OTA molecules during a chromatographic run on a thin layer chromatographic plate. The fluorescence is detected by an array of amorphous silicon photosensors whose photocurrents are directly proportional to the amount of OTA molecules present in the sample under analysis. By comparison with a reference sample the system is able to determine if the OTA contamination level is below or above the limit law for each food commodity. The system performances have been verified in real matrices analyzing several samples extracted from red wines obtaining a minimum detectable quantity of 0.2ng.
{"title":"Portable detection system for Ochratoxin A by real time chromatography and a-Si:H photodiodes","authors":"D. Caputo, A. Nascetti, C. Fanelli, G. Cesare, R. Scipinotti, A. Ricelli","doi":"10.1109/IWASI.2017.7974265","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974265","url":null,"abstract":"In this paper, we report on the design, fabrication and characterization of a low cost, portable detection system able to quantify, in a rapid and reliable way, the contamination level of Ochratoxin A (OTA) in red wine. The operating principle is the real-time monitoring of the natural fluorescence of OTA molecules during a chromatographic run on a thin layer chromatographic plate. The fluorescence is detected by an array of amorphous silicon photosensors whose photocurrents are directly proportional to the amount of OTA molecules present in the sample under analysis. By comparison with a reference sample the system is able to determine if the OTA contamination level is below or above the limit law for each food commodity. The system performances have been verified in real matrices analyzing several samples extracted from red wines obtaining a minimum detectable quantity of 0.2ng.","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128520698","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 : 2017-06-01DOI: 10.1109/IWASI.2017.7974263
M. Grossi, B. Riccò, C. Parolin, B. Vitali
The detection of bacterial concentration is important in different fields since high microbial contamination or the presence of particular pathogens can seriously endanger human health. The reference technique to measure bacterial concentration is Standard Plate Count (SPC) that, however, has long response times (24 to 72 hours) and is not suitable for automatic implementation. This paper presents a portable embedded system for bacterial concentration measurement based on Impedance Microbiology that is suitable for in-situ measurements and does not require trained personnel. The system has been tested with samples inoculated with different concentrations ot Escherichia cott and its response correlates very well (R2 = 0.9185) with results from SPC.
{"title":"Bacterial concentration detection using a portable embedded sensor system for environmental monitoring","authors":"M. Grossi, B. Riccò, C. Parolin, B. Vitali","doi":"10.1109/IWASI.2017.7974263","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974263","url":null,"abstract":"The detection of bacterial concentration is important in different fields since high microbial contamination or the presence of particular pathogens can seriously endanger human health. The reference technique to measure bacterial concentration is Standard Plate Count (SPC) that, however, has long response times (24 to 72 hours) and is not suitable for automatic implementation. This paper presents a portable embedded system for bacterial concentration measurement based on Impedance Microbiology that is suitable for in-situ measurements and does not require trained personnel. The system has been tested with samples inoculated with different concentrations ot Escherichia cott and its response correlates very well (R2 = 0.9185) with results from SPC.","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128756532","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 : 2017-06-01DOI: 10.1109/IWASI.2017.7974232
G. Mezzina, V. L. Gallo, D. Venuto
This paper describes the architecture of a wearable, wireless embedded system for the Diabetic Peripheral Neuropathy (DPN) assessment in ordinary dynamic movements, such as a fluid gait. In this context, the EMG analysis can provide information about the nerves status by estimating the linked Muscle Fiber Conduction Velocity (MFCV). The system operates with synchronized and digitized data samples from 4 EMG channels, which are positioned on each leg of the person under test, exploiting the guidelines provided by an embedded positional scanning algorithm. This work presents a novel algorithm for the estimation of MFCV that is based on the classic 2-electrodes comparative measurement principle. The system uses dynamic thresholds bit-stream conversion of the EMG signals and a low computational solution for the implementation of the bitstream cross-correlator. The entire system fully operates on Altera Cyclone V FPGA. The experimental results on 3 subjects demonstrate the ability of the proposed method for matching the physiological MFCV values, as reported in medical literature. In particular, comparing the medical values, obtained in controlled environments, with the system extracted MFCV, in the same experimental conditions: the absolute error is, on average, 0.2m/s. The system returns a probability of invalid real-time measures below of 4% (worst case).
本文描述了一种可穿戴的无线嵌入式系统的架构，该系统用于糖尿病周围神经病变(DPN)在普通动态运动(如流体步态)中的评估。在这种情况下，肌电图分析可以通过估计连接的肌纤维传导速度(MFCV)来提供有关神经状态的信息。该系统使用来自4个EMG通道的同步和数字化数据样本进行操作，这些数据样本位于被测者的每条腿上，利用嵌入式位置扫描算法提供的指导方针。本文提出了一种基于经典两电极比较测量原理的MFCV估计新算法。该系统采用动态阈值对肌电信号进行比特流转换，并采用低计算解决方案实现比特流交叉相关器。整个系统在Altera Cyclone V FPGA上完全运行。对3名受试者的实验结果表明，所提出的方法能够匹配医学文献中报道的生理MFCV值。特别是，将受控环境下获得的医学值与系统提取的MFCV进行比较，在相同的实验条件下，绝对误差平均为0.2m/s。系统返回无效实时度量的概率低于4%(最坏情况)。
{"title":"Real-time muscle fiber conduction velocity tracker for diabetic neuropathy monitoring","authors":"G. Mezzina, V. L. Gallo, D. Venuto","doi":"10.1109/IWASI.2017.7974232","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974232","url":null,"abstract":"This paper describes the architecture of a wearable, wireless embedded system for the Diabetic Peripheral Neuropathy (DPN) assessment in ordinary dynamic movements, such as a fluid gait. In this context, the EMG analysis can provide information about the nerves status by estimating the linked Muscle Fiber Conduction Velocity (MFCV). The system operates with synchronized and digitized data samples from 4 EMG channels, which are positioned on each leg of the person under test, exploiting the guidelines provided by an embedded positional scanning algorithm. This work presents a novel algorithm for the estimation of MFCV that is based on the classic 2-electrodes comparative measurement principle. The system uses dynamic thresholds bit-stream conversion of the EMG signals and a low computational solution for the implementation of the bitstream cross-correlator. The entire system fully operates on Altera Cyclone V FPGA. The experimental results on 3 subjects demonstrate the ability of the proposed method for matching the physiological MFCV values, as reported in medical literature. In particular, comparing the medical values, obtained in controlled environments, with the system extracted MFCV, in the same experimental conditions: the absolute error is, on average, 0.2m/s. The system returns a probability of invalid real-time measures below of 4% (worst case).","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122269578","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 : 2017-06-01DOI: 10.1109/IWASI.2017.7974244
N. Zaccheo
The continuous development of Earth Observation technologies has paved the way to a wide range of science and civil applications which have changed and improved our lives in many ways. Nowadays VIS, IR, SWIR and SAR payloads ensure the production of images/data characterized by very high geometrical and spectral standard even when coupled with Small Satellite S/C (<200 kg); differently, in the past 20 years only few improvements have been done in technologies and performance related to TIR optical sensors. The main technical obstacles were related to the necessity to cool down the TIR detector up to cryogenic temperature, thermal noise management, optical and mechanical complexity and reliability: these are critical issues, in contrast with small satellites' performance and budgets. ELISIR (Enhanced Leap-frog Imaging Stationary Interferometer in the InfraRed spectral Range) is a Fourier Transform Spectrometer designed by SITAEL for optical observations in the TIR region of the electromagnetic spectrum. The advanced technology onboard the instrument make it able to overcome the difficulties listed above and fill the observational gap highlighted by previous TIR instruments. ELISIR could be able to collect more than 40 spectral bands with a resolution from 120nm up to 400nm over the 8μm to 14μm wavelength range (the atmospheric window), and assuring 40m of spatial resolution. The high number of spectral bands and across-track pixels allow to classify ELISIR as a hyperspectral imaging sensor. With more bands available, a hyperspectral imager can have wider spectrum of applications and be useful to both the civilian and scientific communities. Given current trends in population growth and climate change, accurate monitoring of the Earth's greenhouse gases, freshwater resources, sea, land and atmosphere pollutants at field-to-global scales become increasingly critical. The emitted energy from the exposed terrestrial surface of the Earth can be also uniquely helpful in identifying rocks, minerals, and soils and in monitoring transient thermal phenomena crucial in premonitory clues of impending volcanoes eruptions. TIR imaging can provide accurate estimates of consumptive water use at the spatial scale of human management and time scale of vegetation growth. Three priority main families of TIR-related user products have been identified: Land surface temperature; Spectral emissivity; Sea surface temperature. The ELISIR compliance to the small-satellite platform is guaranteed by the adoption of design and development criteria as well as by the selected sensor configuration. The triangular Sagnac layout makes the sensor robust against mechanical and thermal stresses, vibrations and shocks while the absence of moving parts prevents any lens misalignments. Moreover the microbolometer technology does not require an active cooling system in favor of a lower power consumption. The result is a compact (670 × 400 × 150 mm3), low-mass (<20 kg), low-power (<50 W) p
{"title":"Innovative technologies for a new generation of small satellites: New concept of a thermal infrared","authors":"N. Zaccheo","doi":"10.1109/IWASI.2017.7974244","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974244","url":null,"abstract":"The continuous development of Earth Observation technologies has paved the way to a wide range of science and civil applications which have changed and improved our lives in many ways. Nowadays VIS, IR, SWIR and SAR payloads ensure the production of images/data characterized by very high geometrical and spectral standard even when coupled with Small Satellite S/C (<200 kg); differently, in the past 20 years only few improvements have been done in technologies and performance related to TIR optical sensors. The main technical obstacles were related to the necessity to cool down the TIR detector up to cryogenic temperature, thermal noise management, optical and mechanical complexity and reliability: these are critical issues, in contrast with small satellites' performance and budgets. ELISIR (Enhanced Leap-frog Imaging Stationary Interferometer in the InfraRed spectral Range) is a Fourier Transform Spectrometer designed by SITAEL for optical observations in the TIR region of the electromagnetic spectrum. The advanced technology onboard the instrument make it able to overcome the difficulties listed above and fill the observational gap highlighted by previous TIR instruments. ELISIR could be able to collect more than 40 spectral bands with a resolution from 120nm up to 400nm over the 8μm to 14μm wavelength range (the atmospheric window), and assuring 40m of spatial resolution. The high number of spectral bands and across-track pixels allow to classify ELISIR as a hyperspectral imaging sensor. With more bands available, a hyperspectral imager can have wider spectrum of applications and be useful to both the civilian and scientific communities. Given current trends in population growth and climate change, accurate monitoring of the Earth's greenhouse gases, freshwater resources, sea, land and atmosphere pollutants at field-to-global scales become increasingly critical. The emitted energy from the exposed terrestrial surface of the Earth can be also uniquely helpful in identifying rocks, minerals, and soils and in monitoring transient thermal phenomena crucial in premonitory clues of impending volcanoes eruptions. TIR imaging can provide accurate estimates of consumptive water use at the spatial scale of human management and time scale of vegetation growth. Three priority main families of TIR-related user products have been identified: Land surface temperature; Spectral emissivity; Sea surface temperature. The ELISIR compliance to the small-satellite platform is guaranteed by the adoption of design and development criteria as well as by the selected sensor configuration. The triangular Sagnac layout makes the sensor robust against mechanical and thermal stresses, vibrations and shocks while the absence of moving parts prevents any lens misalignments. Moreover the microbolometer technology does not require an active cooling system in favor of a lower power consumption. The result is a compact (670 × 400 × 150 mm3), low-mass (<20 kg), low-power (<50 W) p","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"43 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132399126","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 : 2017-06-01DOI: 10.1109/IWASI.2017.7974256
N. Lovecchio, G. Sacco, G. Petrucci, V. Fiore, C. Toti, G. Cesare, D. Caputo, M. Nardecchia, F. Costantini, A. Nascetti
This paper presents a low temperature technological process ahle to integrate an all-glass microfluidic network with an ElectroWetting On Dielectric (EWOD) structure for the digital handling of liquids. The fluidic channels result from the wet-etching of the glass, while the electrodes necessary for the droplet movement are deposited on the bottom and top surfaces of the microfluidic structure. The bottom electrodes are produced by a selective and sequential photolithographic pattern of a stack of metals, insulation layer and hydrophobic film. The top common electrode is made by a continuous transparent conductive oxide, covered by a hydrophobic layer. Compatibility of the technological steps and mechanical robustness of the proposed device have been tested designing and fabricating a microfluidic network integrating a central chamber, with a volume of about 9 μΐ, two reservoirs, two microfluidic channels and 26 EWOD electrodes. The maximum temperature reached during the device fabrication was 330°C, which is two times lower than the one used for the anodic bonding of glass-based microfluidic network.
{"title":"Integration of electrowetting technology inside an all-glass microfluidic network","authors":"N. Lovecchio, G. Sacco, G. Petrucci, V. Fiore, C. Toti, G. Cesare, D. Caputo, M. Nardecchia, F. Costantini, A. Nascetti","doi":"10.1109/IWASI.2017.7974256","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974256","url":null,"abstract":"This paper presents a low temperature technological process ahle to integrate an all-glass microfluidic network with an ElectroWetting On Dielectric (EWOD) structure for the digital handling of liquids. The fluidic channels result from the wet-etching of the glass, while the electrodes necessary for the droplet movement are deposited on the bottom and top surfaces of the microfluidic structure. The bottom electrodes are produced by a selective and sequential photolithographic pattern of a stack of metals, insulation layer and hydrophobic film. The top common electrode is made by a continuous transparent conductive oxide, covered by a hydrophobic layer. Compatibility of the technological steps and mechanical robustness of the proposed device have been tested designing and fabricating a microfluidic network integrating a central chamber, with a volume of about 9 μΐ, two reservoirs, two microfluidic channels and 26 EWOD electrodes. The maximum temperature reached during the device fabrication was 330°C, which is two times lower than the one used for the anodic bonding of glass-based microfluidic network.","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134390918","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 : 2017-06-01DOI: 10.1109/IWASI.2017.7974238
A. D’Alessandro, G. Vitale, S. Scudero, R. D'Anna, Antonio Costanza, A. Fagiolini, L. Greco
In this paper, we have studied the sources of error of a low-cost 3-axis MEMS accelerometer by means of Power Spectral Density and Allan Variance techniques. These techniques were applied to the signals acquired from ten identical devices to characterize the variability of the sensor produced by the same manufacturer. Our analysis showed as identically produced accelerometer have somehow variable behavior in particular at low frequency. It is therefore of paramount importance before their use in Inertial Navigation or Earthquakes Monitoring System, a complete characterization of each single sensors.
{"title":"Characterization of MEMS accelerometer self-noise by means of PSD and Allan Variance analysis","authors":"A. D’Alessandro, G. Vitale, S. Scudero, R. D'Anna, Antonio Costanza, A. Fagiolini, L. Greco","doi":"10.1109/IWASI.2017.7974238","DOIUrl":"https://doi.org/10.1109/IWASI.2017.7974238","url":null,"abstract":"In this paper, we have studied the sources of error of a low-cost 3-axis MEMS accelerometer by means of Power Spectral Density and Allan Variance techniques. These techniques were applied to the signals acquired from ten identical devices to characterize the variability of the sensor produced by the same manufacturer. Our analysis showed as identically produced accelerometer have somehow variable behavior in particular at low frequency. It is therefore of paramount importance before their use in Inertial Navigation or Earthquakes Monitoring System, a complete characterization of each single sensors.","PeriodicalId":332606,"journal":{"name":"2017 7th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126260672","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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