Reham A. Eltuhamy, M. Rady, K. Ibrahim, Haitham A. Mahmoud
Regarding the fault diagnosis of Copper Indium Gallium Selenide (CIGS) PV modules, previously published articles focused on employing statistical analysis of thermography images. This approach failed in many cases to distinguish among fault types. This article presents a novel methodology to diagnose and predict faults of thin-film CIGS PV modules using infrared thermography analysis combined with measurements of I-V characteristics. The proposed methodology encompasses a comprehensive site work to capture images that cover many fault types of the PV module under study. The novelty of the technique depends on utilizing processing and analysis of the captured images using new proposed mathematical parameters to extract different faults’ features. Using I-V measurements combined with thermography analysis, the differences between different types of faults are detected. Then, a general classification matrix of CIGS fault detection and diagnosis, using features based on mathematical parameters and IV measurements has been established. Results show that the analysis of the temperature distribution is proved to be insufficient to identify specific modes of different faults. In addition, the proposed procedure for fault detection and classification, which depends on the pattern of faults, can be used for any type of PV module. This results in more reliance on the proposed technique to increase the confidence level of fault detection.
{"title":"Novel Features Extraction for Fault Detection Using Thermography Characteristics and IV Measurements of CIGS Thin-Film Module","authors":"Reham A. Eltuhamy, M. Rady, K. Ibrahim, Haitham A. Mahmoud","doi":"10.18280/i2m.190501","DOIUrl":"https://doi.org/10.18280/i2m.190501","url":null,"abstract":"Regarding the fault diagnosis of Copper Indium Gallium Selenide (CIGS) PV modules, previously published articles focused on employing statistical analysis of thermography images. This approach failed in many cases to distinguish among fault types. This article presents a novel methodology to diagnose and predict faults of thin-film CIGS PV modules using infrared thermography analysis combined with measurements of I-V characteristics. The proposed methodology encompasses a comprehensive site work to capture images that cover many fault types of the PV module under study. The novelty of the technique depends on utilizing processing and analysis of the captured images using new proposed mathematical parameters to extract different faults’ features. Using I-V measurements combined with thermography analysis, the differences between different types of faults are detected. Then, a general classification matrix of CIGS fault detection and diagnosis, using features based on mathematical parameters and IV measurements has been established. Results show that the analysis of the temperature distribution is proved to be insufficient to identify specific modes of different faults. In addition, the proposed procedure for fault detection and classification, which depends on the pattern of faults, can be used for any type of PV module. This results in more reliance on the proposed technique to increase the confidence level of fault detection.","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44942321","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}
M. Ghodbane, Djamel Benmenine, A. Khechekhouche, B. Boumeddane
In light of the global crises that the world suffers from, the renewable energy exploitation is a viable solution to remedy the various energy crises, knowing that renewable energy is a source of environmental credibility, as it does not cause any pollution or any emissions harmful to the environment. Among the most important renewable energy sources, solar energy is the most important type as it can be exploited thermally by adopting various solar collectors, especially solar concentrators. This paper has been devoted to illustrate the types of solar concentrators, namely point-focus concentrators (Heliostat Field Collectors and Parabolic Dish Collectors) and linear concentrators (Linear Fresnel Reflectors and Parabolic Trough Collectors), in an attempt to clarify its principle and its multiple uses domestically and industrially, especially in areas that are characterized by the abundance of its direct solar radiation. The solar concentrator is a solar thermal energy concentration system, because its use reduces the consumption of fossil fuels harmful to the environment and directly contributes to climate change. Solar thermal concentrators are an effective alternative to fossil generators for thermal energy, as they have many important uses such as the solar electricity production of solar electricity in power plants, industrial and domestic water heating, and have many other industrial uses.
{"title":"Brief on Solar Concentrators: Differences and Applications","authors":"M. Ghodbane, Djamel Benmenine, A. Khechekhouche, B. Boumeddane","doi":"10.18280/i2m.190507","DOIUrl":"https://doi.org/10.18280/i2m.190507","url":null,"abstract":"In light of the global crises that the world suffers from, the renewable energy exploitation is a viable solution to remedy the various energy crises, knowing that renewable energy is a source of environmental credibility, as it does not cause any pollution or any emissions harmful to the environment. Among the most important renewable energy sources, solar energy is the most important type as it can be exploited thermally by adopting various solar collectors, especially solar concentrators. This paper has been devoted to illustrate the types of solar concentrators, namely point-focus concentrators (Heliostat Field Collectors and Parabolic Dish Collectors) and linear concentrators (Linear Fresnel Reflectors and Parabolic Trough Collectors), in an attempt to clarify its principle and its multiple uses domestically and industrially, especially in areas that are characterized by the abundance of its direct solar radiation. The solar concentrator is a solar thermal energy concentration system, because its use reduces the consumption of fossil fuels harmful to the environment and directly contributes to climate change. Solar thermal concentrators are an effective alternative to fossil generators for thermal energy, as they have many important uses such as the solar electricity production of solar electricity in power plants, industrial and domestic water heating, and have many other industrial uses.","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44579351","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}
The aim of this work is to show the effectiveness of a new algorithm named as modified grey wolf optimization (MGWO) algorithm to determine the optimum combination parameters values of a linear antenna array which is widely used in the communication systems. The selection part of the classical GWO has been modified by adopting the competitive exclusion selection inspired from genetic algorithm. The objective to be attained is a directional array factor with a very low level of lateral lobs. To this effect, a Gaussian function centered at 90° with the total absence of secondary lobs is considered as a desired diagram in our simulation. To matches the desired pattern as closely as possible, we considered the optimization of interspacing elements, weights amplitude and phase excitation of the linear antenna array factor. It has been demonstrated that the performance of a printed linear antenna array depends on all parameters, in which simultaneous optimization is imperative to maximize its characteristics. The obtained results show the effectiveness and the flexibility of the proposed algorithm in terms of minimized lateral lobe level compared to PSO algorithm and the convergence speed towards the desired solution.
{"title":"Optimal Pattern Synthesis of Linear Antenna Arrays Using Modified Grey Wolf Optimization Algorithm","authors":"N. Lakhlef, H. Oudira, C. Dumond","doi":"10.18280/i2m.190402","DOIUrl":"https://doi.org/10.18280/i2m.190402","url":null,"abstract":"The aim of this work is to show the effectiveness of a new algorithm named as modified grey wolf optimization (MGWO) algorithm to determine the optimum combination parameters values of a linear antenna array which is widely used in the communication systems. The selection part of the classical GWO has been modified by adopting the competitive exclusion selection inspired from genetic algorithm. The objective to be attained is a directional array factor with a very low level of lateral lobs. To this effect, a Gaussian function centered at 90° with the total absence of secondary lobs is considered as a desired diagram in our simulation. To matches the desired pattern as closely as possible, we considered the optimization of interspacing elements, weights amplitude and phase excitation of the linear antenna array factor. It has been demonstrated that the performance of a printed linear antenna array depends on all parameters, in which simultaneous optimization is imperative to maximize its characteristics. The obtained results show the effectiveness and the flexibility of the proposed algorithm in terms of minimized lateral lobe level compared to PSO algorithm and the convergence speed towards the desired solution.","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46919309","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}
Houssein Mariam, P. Poulichet, H. Takhedmit, E. Richalot, O. Français
https://doi.org/10.18280/i2m.190301 ABSTRACT: Received: 24 October 2019 Accepted: 2 March 2020 This article reports an open-ended coplanar waveguide line (OE-CPW) allowing the characterization of a liquid medium by dielectric spectroscopy within the 0.4-6 GHz frequency range. This proposed technology allows characterization of a medium placed in an integrated microfluidic channel located at the end of the CPW line. The medium under test occupies a volume of analysis of less than one nanoliter, scale allowing measurements of one to a few biological cells.
{"title":"Dielectric Property Characterization of Liquid Media Using an Open-Ended Probe Within a Microfluidic Chip","authors":"Houssein Mariam, P. Poulichet, H. Takhedmit, E. Richalot, O. Français","doi":"10.18280/i2m.190301","DOIUrl":"https://doi.org/10.18280/i2m.190301","url":null,"abstract":"https://doi.org/10.18280/i2m.190301 ABSTRACT: Received: 24 October 2019 Accepted: 2 March 2020 This article reports an open-ended coplanar waveguide line (OE-CPW) allowing the characterization of a liquid medium by dielectric spectroscopy within the 0.4-6 GHz frequency range. This proposed technology allows characterization of a medium placed in an integrated microfluidic channel located at the end of the CPW line. The medium under test occupies a volume of analysis of less than one nanoliter, scale allowing measurements of one to a few biological cells.","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45577007","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}
C. Zacharie, V. Schick, B. Remy, G. Bergin, T. Mazet, Renaud Egal
{"title":"Identification of Transfer Functions in a Vacuum Brazed Load with ARX Models","authors":"C. Zacharie, V. Schick, B. Remy, G. Bergin, T. Mazet, Renaud Egal","doi":"10.18280/i2m.190308","DOIUrl":"https://doi.org/10.18280/i2m.190308","url":null,"abstract":"","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43831389","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}
J. Perrin, S. Leclerc, M. Ferrari, C. Moyne, D. Stemmelen
Le champ d'application de la Resonance Magnetique Nucleaire est vaste : elle est utilisee couramment comme methode spectroscopique d'analyse en chimie, pour la resolution de structures d'echantillons solides et biologiques ou encore, plus recemment, pour des etudes metaboliques. Le grand public connait l'existence de la RMN par les images anatomiques et fonctionnelles dans le domaine medical. Si ces methodes ont conquis une grande variete d'utilisateurs, c'est parce qu'elles donnent acces a des parametres a la fois a l'echelle moleculaire et macroscopique et qu'elles permettent de suivre des phenomenes dans le temps. L'imagerie par resonance magnetique (IRM) permet notamment d'acceder aux heterogeneites structurales a l'echelle de quelques centaines de microns, aux cartographies de concentration, de vitesse, voire de temperature. Alors que l'IRM est utilisee de facon efficace dans des systemes du genie civil et de l'agroalimentaire, nous developpons ici quelques exemples d'etudes dans le domaine des sciences pour l'ingenieur au sens large : transport en milieux poreux, rheologie de fluides complexes et transport d'eau dans des membranes polymeres. Ces etudes ont en commun de mettre en oeuvre des appareillages et methodologies dedies aux objets et aux conditions experimentales. Elles ont ete realisees sur des spectrometres operant a des champs magnetiques de 2.34 T (Bruker Biospec 24/40, 100 MHz) et 14.1T (Bruker AVANCE III a large entrefer, 600 MHz). Ecoulements diphasiques en milieu poreux L'etude des ecoulements diphasiques en milieu poreux revet un interet considerable dans l'industrie petroliere (estimation des reserves exploitables, optimisation des techniques de recuperation…) mais egalement dans le secteur de l'industrie chimique (reacteurs catalytiques, separation et extraction) ou dans le domaine de l'hydrogeologie (pollution des aquiferes par les NAPL). Ceci explique l'importance des travaux visant a ameliorer la description des ecoulements multiphasiques en milieu poreux. En particulier, l'ecoulement simultane de deux fluides non miscibles (eau-huile) dans un milieu poreux n'est pas toujours bien decrit par la loi de Darcy generalisee qui ne prend en compte que la saturation en eau-huile en tant que variable descriptive supplementaire. En utilisant la technique d'IRM, nous avons cherche a etudier le deplacement de deux fluides non miscibles, l'eau et l'huile, dans un milieu poreux en examinant les effets simultanes des forces de gravite, de viscosite et de tension superficielle. Il est connu que le caractere mouillant ou non-mouillant de chacun des fluides, a l'egard de la phase solide composant le milieu poreux, est un facteur important et joue par exemple un role essentiel dans la recuperation assistee des hydrocarbures. Nous nous sommes interesses plus particulierement a la dynamique du front de deplacement eau-huile, a sa deformation et au piegeage de l'huile.
{"title":"Magnetic Resonance Imaging Measurements in Engineering Science","authors":"J. Perrin, S. Leclerc, M. Ferrari, C. Moyne, D. Stemmelen","doi":"10.18280/i2m.190304","DOIUrl":"https://doi.org/10.18280/i2m.190304","url":null,"abstract":"Le champ d'application de la Resonance Magnetique Nucleaire est vaste : elle est utilisee couramment comme methode spectroscopique d'analyse en chimie, pour la resolution de structures d'echantillons solides et biologiques ou encore, plus recemment, pour des etudes metaboliques. Le grand public connait l'existence de la RMN par les images anatomiques et fonctionnelles dans le domaine medical. Si ces methodes ont conquis une grande variete d'utilisateurs, c'est parce qu'elles donnent acces a des parametres a la fois a l'echelle moleculaire et macroscopique et qu'elles permettent de suivre des phenomenes dans le temps. L'imagerie par resonance magnetique (IRM) permet notamment d'acceder aux heterogeneites structurales a l'echelle de quelques centaines de microns, aux cartographies de concentration, de vitesse, voire de temperature. Alors que l'IRM est utilisee de facon efficace dans des systemes du genie civil et de l'agroalimentaire, nous developpons ici quelques exemples d'etudes dans le domaine des sciences pour l'ingenieur au sens large : transport en milieux poreux, rheologie de fluides complexes et transport d'eau dans des membranes polymeres. Ces etudes ont en commun de mettre en oeuvre des appareillages et methodologies dedies aux objets et aux conditions experimentales. Elles ont ete realisees sur des spectrometres operant a des champs magnetiques de 2.34 T (Bruker Biospec 24/40, 100 MHz) et 14.1T (Bruker AVANCE III a large entrefer, 600 MHz). Ecoulements diphasiques en milieu poreux L'etude des ecoulements diphasiques en milieu poreux revet un interet considerable dans l'industrie petroliere (estimation des reserves exploitables, optimisation des techniques de recuperation…) mais egalement dans le secteur de l'industrie chimique (reacteurs catalytiques, separation et extraction) ou dans le domaine de l'hydrogeologie (pollution des aquiferes par les NAPL). Ceci explique l'importance des travaux visant a ameliorer la description des ecoulements multiphasiques en milieu poreux. En particulier, l'ecoulement simultane de deux fluides non miscibles (eau-huile) dans un milieu poreux n'est pas toujours bien decrit par la loi de Darcy generalisee qui ne prend en compte que la saturation en eau-huile en tant que variable descriptive supplementaire. En utilisant la technique d'IRM, nous avons cherche a etudier le deplacement de deux fluides non miscibles, l'eau et l'huile, dans un milieu poreux en examinant les effets simultanes des forces de gravite, de viscosite et de tension superficielle. Il est connu que le caractere mouillant ou non-mouillant de chacun des fluides, a l'egard de la phase solide composant le milieu poreux, est un facteur important et joue par exemple un role essentiel dans la recuperation assistee des hydrocarbures. Nous nous sommes interesses plus particulierement a la dynamique du front de deplacement eau-huile, a sa deformation et au piegeage de l'huile.","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49044942","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}
Received: 10 May 2019 Accepted: 24 September 2019 The aim of this work is to obtain an indirect evaluation of the pressures and flow rates in the coronary network, in locations where direct measurements are not possible, or invasive, or too expansive, ... More precisely, the study is focused on the role of collateral flows in three-vessel disease patients, before and after bypass grafting, depending on the severity of the stenoses and thromboses. A model of the coronary circulation based on hydraulic / electric analogy has been developed; it is patient’s specific because some of the parameters are determined using per-operative classical measurements. Results show that the complete revascularization is fully justified for these patients, that collateral flows remain low in any cases, and that capillary and collateral resistances have a major impact on the flows and pressures everywhere in the network. The simulations also bring some arguments to current medical debates, such as flow competitions between the grafts and native vessels, or long-term effect of Drug Eluting Stents, or the use of the FFR index to evaluate the severity of stenoses.
{"title":"Quantification of Collateral Flows in Patients with Severe Coronaropathies","authors":"A. Drochon, A. Anselmi, H. Corbineau, J. Verhoye","doi":"10.18280/i2m.190309","DOIUrl":"https://doi.org/10.18280/i2m.190309","url":null,"abstract":"Received: 10 May 2019 Accepted: 24 September 2019 The aim of this work is to obtain an indirect evaluation of the pressures and flow rates in the coronary network, in locations where direct measurements are not possible, or invasive, or too expansive, ... More precisely, the study is focused on the role of collateral flows in three-vessel disease patients, before and after bypass grafting, depending on the severity of the stenoses and thromboses. A model of the coronary circulation based on hydraulic / electric analogy has been developed; it is patient’s specific because some of the parameters are determined using per-operative classical measurements. Results show that the complete revascularization is fully justified for these patients, that collateral flows remain low in any cases, and that capillary and collateral resistances have a major impact on the flows and pressures everywhere in the network. The simulations also bring some arguments to current medical debates, such as flow competitions between the grafts and native vessels, or long-term effect of Drug Eluting Stents, or the use of the FFR index to evaluate the severity of stenoses.","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43234401","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}
D. Ligot, Christine Marguet, B. Favre, B. Messaoudi, D. Gervasoni, P. Litaudon
L’etude du lien entre la respiration et les rythmes cerebraux fait l’objet d’un interet croissant. Pour etudier, chez les rongeurs, l’impact de ce lien sur les fonctions cognitives, l’activite respiratoire doit etre enregistree chez un animal libre de ses mouvements. Nous avons choisi d’utiliser un capteur EPIC qui detecte les changements du potentiel electrique spatial environnant, sans perturbations, et donc les deplacements de charges electriques induits par les mouvements respiratoires. Apres avoir valide l’utilisation de ce capteur sur un animal anesthesie, nous avons caracterise sa sensibilite grâce a l’utilisation d’un fantome permettant de simuler les mouvements respiratoires a differentes frequences. La derniere serie d’experiences menee chez un animal vigile demontre que ce capteur permet de recueillir a distance l’activite respiratoire tant pendant les periodes de respiration lente (eveil calme – sommeil) que lors des phases de flairage (respiration rapide) lorsque l’animal explore son environnement.
{"title":"Noninvasive Instrumentation for Respiratory Activity Recording in Freely Moving Rats Placed a Large Experimental Space","authors":"D. Ligot, Christine Marguet, B. Favre, B. Messaoudi, D. Gervasoni, P. Litaudon","doi":"10.18280/i2m.190303","DOIUrl":"https://doi.org/10.18280/i2m.190303","url":null,"abstract":"L’etude du lien entre la respiration et les rythmes cerebraux fait l’objet d’un interet croissant. Pour etudier, chez les rongeurs, l’impact de ce lien sur les fonctions cognitives, l’activite respiratoire doit etre enregistree chez un animal libre de ses mouvements. Nous avons choisi d’utiliser un capteur EPIC qui detecte les changements du potentiel electrique spatial environnant, sans perturbations, et donc les deplacements de charges electriques induits par les mouvements respiratoires. Apres avoir valide l’utilisation de ce capteur sur un animal anesthesie, nous avons caracterise sa sensibilite grâce a l’utilisation d’un fantome permettant de simuler les mouvements respiratoires a differentes frequences. La derniere serie d’experiences menee chez un animal vigile demontre que ce capteur permet de recueillir a distance l’activite respiratoire tant pendant les periodes de respiration lente (eveil calme – sommeil) que lors des phases de flairage (respiration rapide) lorsque l’animal explore son environnement.","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68083174","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}
Kedi Zhou, Patrick Bouriat, Nelly Hobeika, A. Touil, Anthony Ranchou-Peyruse, D. Broseta, Ross Brown
Received: 19 December 2019 Accepted: 28 March 2020 Glass micro-capillaries are the simplest yet most versatile, robust, practical and cheap microfluidic devices. Their small size and high optical quality favour detailed investigation under the optical microscope. Here we first review some of their applications, such as determining contact angles and the observation of tenuous wetting films under harsh conditions of pressure and temperature. We further explore how an optical cusp formed by reflection off the inner wall of a glass capillary may be used to monitor the refractive index of its fluid content. Finally, we illustrate how the above advantages may be put to use in the study of extremophile microorganisms, for example in recreating under the microscope the conditions prevailing on the ocean floors.
{"title":"Small But Powerful Optically: Glass Microcapillaries for Studying Complex Fluids or Biological Systems with Submicrolitre Samples under Harsh Conditions","authors":"Kedi Zhou, Patrick Bouriat, Nelly Hobeika, A. Touil, Anthony Ranchou-Peyruse, D. Broseta, Ross Brown","doi":"10.18280/i2m.190307","DOIUrl":"https://doi.org/10.18280/i2m.190307","url":null,"abstract":"Received: 19 December 2019 Accepted: 28 March 2020 Glass micro-capillaries are the simplest yet most versatile, robust, practical and cheap microfluidic devices. Their small size and high optical quality favour detailed investigation under the optical microscope. Here we first review some of their applications, such as determining contact angles and the observation of tenuous wetting films under harsh conditions of pressure and temperature. We further explore how an optical cusp formed by reflection off the inner wall of a glass capillary may be used to monitor the refractive index of its fluid content. Finally, we illustrate how the above advantages may be put to use in the study of extremophile microorganisms, for example in recreating under the microscope the conditions prevailing on the ocean floors.","PeriodicalId":38637,"journal":{"name":"Instrumentation Mesure Metrologie","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45387588","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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