A Sub-μVRms Chopper Front-End for ECoG Recording

This paper presents a low-noise, low-power fully differential chopper-modulated front-end circuit intended for ECoG signal recording. Among other features, it uses a subthreshold source-follower biquad in the forward path to reduce noise and avoid the implementation of a ripple rejection loop. The prototype was designed in 0.18μm CMOS technology with a 1V supply. Post-layout simulations were carried out showing a power consumption below 2μW and an integrated input-referred noise of 0.75μV rms , with a noise floor below 50 nV√Hz, over a bandwidth from 1 to 200Hz, for a noise efficiency factor of 2.7.Ministerio de Economía y Empresa TEC2016-80923-

Low Budget Respirometer Chamber Design Based on Wireless Sensor Network

Fresh fruit respiration information is essential optimizing food storage systems. Meanwhile, respiration is defined as the process of oxygen production and carbon dioxide release during storage in a closed respiratory chamber. Therefore, this study aims to design a low-budget computerized respiratory chamber for enhancing fruit packaging and storage system. Real-time fruit respiration can be measured by applying wireless gas sensors network. The respirometer consisted of 3,600 mL glass jar with a screw stainless lid, while the electrochemical and non-dispersive infrared sensors were mounted on the cover of the glass jar for collecting data on the oxygen, carbon dioxide, and temperature during mangoes’ respiration. Arduino USB port was used to record all measured parameters consisting of oxygen (%) and carbon dioxide concentrations (ppm, as well as temperature in the respiration chamber. Additionally, a controlled cooling chamber was applied to maintain the temperature during storage, while data communication was supported by Xbee S2C based on radio frequency. According to the respirometer real-time reading, there was a decrease in oxygen concentration caused by increasing carbon dioxide release with temperature. The low-budget respirometer was used to measure the respiration rate and record the data through a wireless sensor network system. The data plot shows that the respiration rate increased as the storage temperature and the respiratory quotient ranged from 0.32-0.44

Diseño e implementación de un Sistema embebido

This article presents the design and implementation of an embedded system called TES ROv2.0 non-invasive, capable of capturing and transmitting relevant biomedical signals such as: electrocardiography signals, heart rate, oxygen saturation in the blood and arterial pressure with the Support from the Clinical Information System called "SARURO", in which a detailed process of these biomedical signals is visualized and carried out by a doctor or specialist, without direct contact with the patient. Therefore, researchers have been able to affirm that integrated systems are tools that offer great versatility in the medical information market, allowing acquisition, adaptation, transformation in remote places, without linking operation to a single communication alternative, making the Telemonitoring system more versatile in its functionality to transmit over WPAN, WLAN, LAN and CELULARE networks.Este articulo presenta el diseño e implementación de un sistema embebido llamado TES ROv2.0 no invasivo, capaz de capturar y transmitir señales biomédicas relevantes como: las señales de electrocardiografía, frecuencia cardíaca, la saturación de oxígeno en la sangre y la presión arterial con el apoyo del  Sistema de Información clínico llamado "SARURO", en el cual se visualiza y efectúa un proceso detallado de estas señales biomédicas por parte de un médico o especialista, sin el contacto  directo con el paciente. Por tanto, los investigadores han podido afirmar que los sistemas integrados son herramientas que ofrecen una gran versatilidad en el mercado de la información médica, lo que permite la adquisición, adaptación, transformación en lugares remotos, sin ligar el funcionamiento a una única alternativa de comunicación, haciendo al sistema de telemonitorización más versátil en su funcionalidad para transmitir por redes WPAN, WLAN, LAN y CELULARES