Pub Date : 2016-10-01DOI: 10.1109/ETCM.2016.7750866
R. Contreras, M. Huerta, G. Sagbay, C. Llumiguano, M. Bravo, A. Bermeo, R. Clotet, Á. Soto
Parkinson's disease is a neurological disorder that affects about 1% of people over 60 years. The complexity of the disease difficult to carry out objective medical assessments of the level of tremors. This article presents a system which uses the accelerometer and gyroscope sensors in smartwatches to quantify the tremors in patients with Parkinson's disease. The system is based on a Wireless Body Area Network composed by multiple sensor nodes (Android Wears) and one sink node (Android Smartphone). The system integrates four processes: user authentication, placement of sensors on the body, movement sensing and data uploading. The system was evaluated in 12 patients with PD (five males and seven females) while they were doing several activities, but in this article we only analyses when the patients were seated at rest. The patients had an average disease duration of 6.25 years, an average age of 66.33 years and a range of 5186 years. The tremor magnitudes were presented in the form of linear acceleration and angular velocity in the time domain. The results indicate that these variables can determine Parkinson's disease evolution in a patient diagnosed with stage 3 and 4.
{"title":"Tremors quantification in parkinson patients using smartwatches","authors":"R. Contreras, M. Huerta, G. Sagbay, C. Llumiguano, M. Bravo, A. Bermeo, R. Clotet, Á. Soto","doi":"10.1109/ETCM.2016.7750866","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750866","url":null,"abstract":"Parkinson's disease is a neurological disorder that affects about 1% of people over 60 years. The complexity of the disease difficult to carry out objective medical assessments of the level of tremors. This article presents a system which uses the accelerometer and gyroscope sensors in smartwatches to quantify the tremors in patients with Parkinson's disease. The system is based on a Wireless Body Area Network composed by multiple sensor nodes (Android Wears) and one sink node (Android Smartphone). The system integrates four processes: user authentication, placement of sensors on the body, movement sensing and data uploading. The system was evaluated in 12 patients with PD (five males and seven females) while they were doing several activities, but in this article we only analyses when the patients were seated at rest. The patients had an average disease duration of 6.25 years, an average age of 66.33 years and a range of 5186 years. The tremor magnitudes were presented in the form of linear acceleration and angular velocity in the time domain. The results indicate that these variables can determine Parkinson's disease evolution in a patient diagnosed with stage 3 and 4.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"73 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80922535","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750833
Gaudi Morantes, Jose Cappelleto, Gerardo Fernández, R. Clotet, Rafael R. Torrealba, Simon Guerrero
A Central Pattern Generator (CPG) is a network of neurons capable of producing oscillatory signals without oscillatory inputs. This paper proposes of gait generator for lower lumbar exoskeleton, based on neurophysiological principles. In this manner, based in an Amplitude Controlled Phase Oscillator (ACPO) implementation for a CPG, acting as trajectory generator in normal gait for hip and knee joints of a lower lumbar exoskeleton. Three types of topologies are evaluated to determine the most suitable for this system. The results indicated that the “A” topology exhibits a smoother reaction to perturbations, which is desirable for a safe and comfortable human-machine interaction. It is also proposed as future work, the evaluation of the trajectories generator in the exoskeleton model and control.
{"title":"Comparison of CPG topologies for bipedal gait","authors":"Gaudi Morantes, Jose Cappelleto, Gerardo Fernández, R. Clotet, Rafael R. Torrealba, Simon Guerrero","doi":"10.1109/ETCM.2016.7750833","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750833","url":null,"abstract":"A Central Pattern Generator (CPG) is a network of neurons capable of producing oscillatory signals without oscillatory inputs. This paper proposes of gait generator for lower lumbar exoskeleton, based on neurophysiological principles. In this manner, based in an Amplitude Controlled Phase Oscillator (ACPO) implementation for a CPG, acting as trajectory generator in normal gait for hip and knee joints of a lower lumbar exoskeleton. Three types of topologies are evaluated to determine the most suitable for this system. The results indicated that the “A” topology exhibits a smoother reaction to perturbations, which is desirable for a safe and comfortable human-machine interaction. It is also proposed as future work, the evaluation of the trajectories generator in the exoskeleton model and control.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"326 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80373825","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750840
J. Villacrés, M. Viscaino, M. Herrera, O. Camacho, D. Chávez
This paper presents experimental results of a two-wheeled inverted pendulum path planning. The model of the robot, which has six identified variables, is linearized by least squares estimation. A Linear-quadratic Regulator is designed to maintain the robot stabilized, while it moves over a path. Furthermore, an integral part is added to the controller in order to achieve steady state equal to zero. Thus the result is an optimal PI controller. The path planning is designed using a Rapidly Exploring Random Tree Connect method. In addition, two algorithms are presented to improve the quality of the path, the first algorithm reduces the redundant paths and the second algorithm uses the Bezier curves to smooth the path.
{"title":"Two-wheeled inverted pendulum path planning: An experimental validation","authors":"J. Villacrés, M. Viscaino, M. Herrera, O. Camacho, D. Chávez","doi":"10.1109/ETCM.2016.7750840","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750840","url":null,"abstract":"This paper presents experimental results of a two-wheeled inverted pendulum path planning. The model of the robot, which has six identified variables, is linearized by least squares estimation. A Linear-quadratic Regulator is designed to maintain the robot stabilized, while it moves over a path. Furthermore, an integral part is added to the controller in order to achieve steady state equal to zero. Thus the result is an optimal PI controller. The path planning is designed using a Rapidly Exploring Random Tree Connect method. In addition, two algorithms are presented to improve the quality of the path, the first algorithm reduces the redundant paths and the second algorithm uses the Bezier curves to smooth the path.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"44 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76363577","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750831
S. Falcones, R. Ayyanar
In this paper, the design of a linear quadratic regulator (LQR) controller for the DC-DC stage of a Solid State Transformer (SST) based on a quad-active-bridge (QAB) to integrate both photovoltaic (PV) power generation and battery energy storage is presented. The gyrator-based average model is used for deriving the state-space representation of the plant. The dynamic performance of the designed controller is verified through extensive simulation of the switching model and validated with experimental results.
{"title":"LQR control of a quad-active-bridge converter for renewable integration","authors":"S. Falcones, R. Ayyanar","doi":"10.1109/ETCM.2016.7750831","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750831","url":null,"abstract":"In this paper, the design of a linear quadratic regulator (LQR) controller for the DC-DC stage of a Solid State Transformer (SST) based on a quad-active-bridge (QAB) to integrate both photovoltaic (PV) power generation and battery energy storage is presented. The gyrator-based average model is used for deriving the state-space representation of the plant. The dynamic performance of the designed controller is verified through extensive simulation of the switching model and validated with experimental results.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"4 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87478472","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750817
Angel A. Recalde L, Diana Cervantes, S. Falcones
Electrical power systems must balance demand and generation almost instantly to maintain frequency. This task is performed at each power station with the load frequency controller. On wider areas, the energy management systems supervise generation control automatically to preserve stability and reliability. Due to the unpredictability of the demand, the control response must be as fast as possible to prevent larger deviations that could lead to cascading failures and outages. In order to understand the dynamic behavior and capabilities of the controllers, real time simulation offers a great advantage over its offline predecessors, not only for operational training but also for prototyping. This paper studies the effectiveness of the real time simulator in the analysis of a power system load frequency control.
{"title":"Internal mode control for power system load frequency regulation assessment and real time simulation","authors":"Angel A. Recalde L, Diana Cervantes, S. Falcones","doi":"10.1109/ETCM.2016.7750817","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750817","url":null,"abstract":"Electrical power systems must balance demand and generation almost instantly to maintain frequency. This task is performed at each power station with the load frequency controller. On wider areas, the energy management systems supervise generation control automatically to preserve stability and reliability. Due to the unpredictability of the demand, the control response must be as fast as possible to prevent larger deviations that could lead to cascading failures and outages. In order to understand the dynamic behavior and capabilities of the controllers, real time simulation offers a great advantage over its offline predecessors, not only for operational training but also for prototyping. This paper studies the effectiveness of the real time simulator in the analysis of a power system load frequency control.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"33 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78584541","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750829
Ricardo Linares, Jose Herrera, Luis Alfaro
Researchers share their results through articles that are published and indexed in scientific databases, which are useful to consult in future research. Generally, the user interface of these databases are traditional, restrict user interaction and limit their field of view. In this paper a new interface model is proposed, based on virtual reality and natural language processing, which together provide a excellent user experience and better use of human capabilities, such as intuition and spatial cognition. In this research they are used the devices Oculus Rif and Leap Motion hardware. The case study is the exploration of scientific articles using Alicia, which is the scientific database of Peru. The motivation for this research is to contribute with better tools to optimize the tasks of literature review and facilitate the work of researchers.
{"title":"AliciaVR: Exploration of scientific articles in an immersive virtual environment with natural user interfaces","authors":"Ricardo Linares, Jose Herrera, Luis Alfaro","doi":"10.1109/ETCM.2016.7750829","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750829","url":null,"abstract":"Researchers share their results through articles that are published and indexed in scientific databases, which are useful to consult in future research. Generally, the user interface of these databases are traditional, restrict user interaction and limit their field of view. In this paper a new interface model is proposed, based on virtual reality and natural language processing, which together provide a excellent user experience and better use of human capabilities, such as intuition and spatial cognition. In this research they are used the devices Oculus Rif and Leap Motion hardware. The case study is the exploration of scientific articles using Alicia, which is the scientific database of Peru. The motivation for this research is to contribute with better tools to optimize the tasks of literature review and facilitate the work of researchers.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"61 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88663018","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750841
J. Triana-Dopico, J. Founes-Merchan, L. Garces-Villon, Nadia Mendieta-Villalba, Tania Rojas-Parraga, F. Terán-Alvarado
From the topological perspective, the availability of genome-scale metabolic network models assists to the large-scale analysis of the metabolites connections, and thus, the evaluation of the cell metabolic capabilities to produce high added-value molecules. In this study, a comprehensive connectivity analysis of the published genome-scale metabolic model of Synechococcus elongatus PCC7942 (iSyf715) is presented, highlighting the most connected metabolites of this biological system. To get a suitable fit, the connectivity distribution of the metabolic model is evaluated using the cumulative distribution function (Pareto's law), verifying a power-law distribution in iSyf715 metabolic network (3=2.203). Additionally, through the comparison of the connectivity distributions in different microbial metabolic network models, the scale-free behavior of these metabolic networks is verified. The prediction of the metabolic network connectivity could supports the determination of the underlying functioning principles of certain cellular processes.
{"title":"Large-scale network connectivity of Synechococcus elongatus PCC7942 metabolism","authors":"J. Triana-Dopico, J. Founes-Merchan, L. Garces-Villon, Nadia Mendieta-Villalba, Tania Rojas-Parraga, F. Terán-Alvarado","doi":"10.1109/ETCM.2016.7750841","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750841","url":null,"abstract":"From the topological perspective, the availability of genome-scale metabolic network models assists to the large-scale analysis of the metabolites connections, and thus, the evaluation of the cell metabolic capabilities to produce high added-value molecules. In this study, a comprehensive connectivity analysis of the published genome-scale metabolic model of Synechococcus elongatus PCC7942 (iSyf715) is presented, highlighting the most connected metabolites of this biological system. To get a suitable fit, the connectivity distribution of the metabolic model is evaluated using the cumulative distribution function (Pareto's law), verifying a power-law distribution in iSyf715 metabolic network (3=2.203). Additionally, through the comparison of the connectivity distributions in different microbial metabolic network models, the scale-free behavior of these metabolic networks is verified. The prediction of the metabolic network connectivity could supports the determination of the underlying functioning principles of certain cellular processes.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"42 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83659399","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750852
Daniel P. Benalcazar, L. Eguiguren, M. B. Alvarez, E. Arteaga, F. Jácome, M. Grunauer
This work introduces the engineering design of a device capable to detect serum turbidity. We hypothesized that an electronic, portable, and low cost device that can provide objective, quantitative measurements of serum turbidity might have the potential to improve the early detection of neonatal sepsis. The design features, testing methodologies, and the obtained results are described. The final electronic device was evaluated in two experiments. The first one consisted in recording the turbidity value measured by the device for different solutions with known concentrations and different degrees of turbidity. The second analysis demonstrates a positive correlation between visual turbidity estimation and electronic turbidity measurement. Furthermore, our device demonstrated high turbidity in serum from two neonates with sepsis (one with a confirmed positive blood culture; the other one with a clinical diagnosis). We conclude that our electronic device may effectively measure serum turbidity at the bedside. Future studies will widen the possibility of additional clinical implications.
{"title":"Design of an electronic device for turbidity detection in blood serum in newborns","authors":"Daniel P. Benalcazar, L. Eguiguren, M. B. Alvarez, E. Arteaga, F. Jácome, M. Grunauer","doi":"10.1109/ETCM.2016.7750852","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750852","url":null,"abstract":"This work introduces the engineering design of a device capable to detect serum turbidity. We hypothesized that an electronic, portable, and low cost device that can provide objective, quantitative measurements of serum turbidity might have the potential to improve the early detection of neonatal sepsis. The design features, testing methodologies, and the obtained results are described. The final electronic device was evaluated in two experiments. The first one consisted in recording the turbidity value measured by the device for different solutions with known concentrations and different degrees of turbidity. The second analysis demonstrates a positive correlation between visual turbidity estimation and electronic turbidity measurement. Furthermore, our device demonstrated high turbidity in serum from two neonates with sepsis (one with a confirmed positive blood culture; the other one with a clinical diagnosis). We conclude that our electronic device may effectively measure serum turbidity at the bedside. Future studies will widen the possibility of additional clinical implications.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"23 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78180022","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750839
Viviana Moya, V. Espinosa, D. Chávez, P. Leica, O. Camacho
The aim of this paper is to analyze the performance through the ISE index between the two techniques SMC and PD control for quadcopters formation based on a virtual structure by establishing geometrical relationships between the virtual leader (centroid) and quadcopters located in each vertex. The controllers are used for stabilization and trajectory tracking. To analyze the stability, the direct method of Lyapunov is used.
{"title":"Trajectory tracking for quadcopter's formation with two control strategies","authors":"Viviana Moya, V. Espinosa, D. Chávez, P. Leica, O. Camacho","doi":"10.1109/ETCM.2016.7750839","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750839","url":null,"abstract":"The aim of this paper is to analyze the performance through the ISE index between the two techniques SMC and PD control for quadcopters formation based on a virtual structure by establishing geometrical relationships between the virtual leader (centroid) and quadcopters located in each vertex. The controllers are used for stabilization and trajectory tracking. To analyze the stability, the direct method of Lyapunov is used.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"18 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74114750","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750828
H. Nieto-Chaupis
We present a model of Probability of Success Call Completion (PSCC) from a typical I/O procedure and computationally tested through Monte Carlo simulation with Gaussian profiles. Under the I/O view the input and transfer functions are prepared without to abandon the randomness nature of the phenomenology. Because kernels are required by the I/O formulation, we have assumed that the Dirac-Delta functions play the role of kernels in according to the I/O representation. The results would indicate that under certain circumstances the formulation I/O is valid by a 10% of error respect to the Meo-Ajmone model. However, the weakness of the I/O approach would be in the extraction of a large number of free parameters, which do not necessarily encompasses the dynamic of phenomenon.
{"title":"Modeling and Monte Carlo simulation of call completion success probabilities under the input-output scheme","authors":"H. Nieto-Chaupis","doi":"10.1109/ETCM.2016.7750828","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750828","url":null,"abstract":"We present a model of Probability of Success Call Completion (PSCC) from a typical I/O procedure and computationally tested through Monte Carlo simulation with Gaussian profiles. Under the I/O view the input and transfer functions are prepared without to abandon the randomness nature of the phenomenology. Because kernels are required by the I/O formulation, we have assumed that the Dirac-Delta functions play the role of kernels in according to the I/O representation. The results would indicate that under certain circumstances the formulation I/O is valid by a 10% of error respect to the Meo-Ajmone model. However, the weakness of the I/O approach would be in the extraction of a large number of free parameters, which do not necessarily encompasses the dynamic of phenomenon.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"77 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82059203","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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