133 research outputs found
Verification of the method to determine the moisture content in meat products
MotivationThere are various reason why food industries can determine humidity, becoming highly important the issue of growing microorganisms caused by an excess on water in raw materials. The normative ISO 9001:2015 is essential for the implantation of an improved orientated system having guarantees to comply with the requirements of the product or service as well as meeting customer´s expectations.MethodsThe drying methods are the most common ones to asses food moisture content. Although these methods give good results, it is difficult sometimes to remove all the humidity by drying. It is also important to mention that food can decompose at certain temperature so other substances can volatilize apart from water. Thus, the measurement of weight loss of the sample caused by water evaporation is made with a forced air circulation heater at atmospheric pressure, according to ISO 1442:1997.ResultsDuring the evaluation the checking of the procedures requires the application of uniform and consistent technical criteria.Due to the importance of meat and meat products because of its high protein in the human diet and its huge quantify demand that is analyzed in laboratories, it is observed by graphical representation the tendency of the obtained data. The proper temperature is 105ºC.ConclusionsThe method to quantify the moisture content of various meat products is valid obtaining reliable results with the possibility of itsfuture accreditation
Incidental computed tomography diagnosis of a rare triad consisting of absence of coronary sinus, persistent left superior vena cava, and scimitar syndrome
We report a case of an unusual congenital triad consisting of absence of coronary sinus, persistent left superior vena cava and scimitar
syndrome incidentally found in a CT-scan performed on a female complaining of exertional dyspnea
Cardiac resynchronization therapy and valvular cardiomyopathy after corrective surgery
Cardiac resynchronization therapy (CRT) has been
shown to have clinical benefits in certain groups of
patients with advanced heart failure (HF). However,
patients with valvular cardiomyopathy are
underrepresented in randomized clinical studies. The aim
of this study was to assess the medium-term (i.e., at 6
months) effects of CRT in patients with HF exclusively
due to valvular disease. The study included 40
consecutive patients who underwent CRT device
implantation. At 6 months, there were improvements in
functional class, left ventricular remodeling, and
intraventricular dyssynchrony parameters in treated
patients. In this particular subgroup of patients, the
benefits of CRT were similar to those observed in patients
with HF due to other etiologies
Online System for Power Quality Operational Data Management in Frequency Monitoring Using Python and Grafana
This article proposes a measurement solution designed to monitor the instantaneous
frequency in power systems. It uses a data acquisition module and a GPS receiver for time stamping
and traceability. A Python-based module receives data, computes the frequency, and finally transfers
the measurement results to a database. The frequency is calculated with two different methods,
which are compared in the article. The stored data is visualized using the Grafana platform, thus
demonstrating its potential for comparing scientific data. The system as a whole constitutes an
efficient, low-cost solution as a data acquisition system.This research is funded by the Spanish Ministry of Science and Education through the project PID2019-108953RB-C21; has been co-financed by the European Union under the 2014-2020 ERDF Operational Program. Additionally, funding for frequency monitoring comes from the Andalusian-FEDER project FEDER-UCA18-108516 (Intelligent Techniques for visualization and data compression of PQ data in the smart grid)
Design and Test of a High-Performance Wireless Sensor Network for Irradiance Monitoring
Cloud-induced photovoltaic variability can affect grid stability and power quality, especially
in electricity systems with high penetration levels. The availability of irradiance field forecasts in the
scale of seconds and meters is fundamental for an adequate control of photovoltaic systems in order
to minimize their impact on distribution networks. Irradiance sensor networks have proved to be
efficient tools for supporting these forecasts, but the costs of monitoring systems with the required
specifications are economically justified only for large plants and research purposes. This study deals
with the design and test of a wireless irradiance sensor network as an adaptable operational solution
for photovoltaic systems capable of meeting the measurement specifications necessary for capturing
the clouds passage. The network was based on WiFi, comprised 16 pyranometers, and proved to be
stable at sampling periods up to 25 ms, providing detailed spatial representations of the irradiance
field and its evolution. As a result, the developed network was capable of achieving comparable
specifications to research wired irradiance monitoring network with the advantages in costs and
flexibility of the wireless technology, thus constituting a valuable tool for supporting nowcasting
systems for photovoltaic management and control
Reconfigurable Web-Interface Remote Lab for Instrumentation and Electronic Learning
Lab sessions in Engineering education are designed to reinforce theoretical concepts. However, there is usually not enough time to reinforce all of them. Remote and virtual labs give students more time to reinforce those concepts. In particular, with remote labs, this can be done interacting with real lab instruments and specific configurations. This work proposes a flexible configuration for Remote Lab Sessions, based on some of 2019 most popular programming languages (Python and JavaScript). This configuration needs minimal network privileges, it is easy to scale and reconfigure. Its structure is based on a unique Reception-Server (which hosts User database, and Time Shift Manager, it is accessible from The Internet, and connects Users with Instruments-Servers) and some Instrument-Servers (which manage hardware connection and host experiences). Users always connect to the Reception-Server, and book a shift for an experience. During the time range associate to that shift, User is internally forwarded to Instrument-Server associated with the selected experience, so User is still connected to the Reception-Serer. In this way, Reception-Server acts as a firewall, protecting Instrument-Servers, which never are open to The Internet. A triple evaluation system is implemented, User session logging with auto-evaluation (objectives accomplished), a knowledge test and an interaction survey. An example experience is implemented, controlling a DC source using Standard Commands for Programmable Instruments
Site Characterization Index for Continuous Power Quality Monitoring Based on Higher-order Statistics
The high penetration of distributed generation (DG) has set up a challenge for energy management and consequently for the monitoring and assessment of power quality (PQ). Besides, there are new types of disturbances owing to the uncontrolled connections of non-linear loads. The stochastic behaviour triggers the need for new holistic indicators which also deal with big data of PQ in terms of compression and scalability so as to extract the useful information regarding different network states and the prevailing PQ disturbances for future risk assessment and energy management systems. Permanent and continuous monitoring would guarantee the report to claim for damages and to assess the risk of PQ distortions. In this context, we propose a measurement method that postulates the use of two-dimensional (2D) diagrams based on higher-order statistics (HOSs) and a previous voltage quality index that assesses the voltage supply waveform in a continous monitoring campaign. Being suitable for both PQ and reliability applications, the results conclude that the inclusion of HOS measurements in the industrial metrological reports helps characterize the deviations of the voltage supply waveform, extracting the individual customers' pattern fingerprint, and compressing the data from both time and spatial aspects. The method allows a continuous and robust performance needed in the SG framework. Consequently, the method can be used by an average consumer as a probabilistic method to assess the risk of PQ deviations in site characterization.This work was supported by the Spanish Ministry of Science and Innovation (Statal Agency for Research), and the EU (AEI/FEDER/UE) via project PID2019-108953RB-C21 Strategies for Aggregated Generation of Photovoltaic Plants: Energy and Meteorological Operational Data (SAGPVEMOD), and the precedent TEC2016-77632-C3-3-R
Miocarditis aguda: diagnóstico mediante resonancia magnética cardiaca
Cardiomyopathies are a common cause of morbidity
and mortality. Myocarditis, which is included
among specific cardiomyopathies, frequently presents
non-specific clinical manifestations and thus may be
difficult to diagnose, or even be misdiagnosed. Traditionally
employed diagnostic techniques, including
endomyocardial biopsy, have been shown to be of limited
value. Following its overall implantation in clinical
practice, cardiac magnetic resonance imaging (MRI) is
nowadays widely considered to be the best non-invasive
diagnostic tool available for diagnosing myocarditi
Protein crystallization in short-peptide supramolecular hydrogels: A versatile strategy towards biotechnological composite materials
Protein crystallization in hydrogels has been explored with the main purpose of facilitating the growth of high quality crystals while increasing their size to enhance their manipulation. New avenues are currently being built for the use of protein crystals as source materials to create sensors and drug delivery vehicles, to name just a few. In this sense, short-peptide supramolecular hydrogels may play a crucial role in integrating protein crystals within a wider range of applications. In this article, we show that protein crystallization in short-peptide supramolecular hydrogels is feasible and independent of the type of peptide that forms the hydrogel and/or the protein, although the output is not always the same. As a general trend, it is confirmed that hydrogel fibers are always incorporated within crystals so that novel composite materials for biotechnological applications with enhanced properties are produced.This research was funded by the MICINN (Spain) projects
BIO2010-6800 (JAG), CTQ2012-34778 (JJDM), and “Factoría
Española de Cristalización” Consolider-Ingenio 2010 (JAG &
MCM), and by Junta de Andalucía (Spain) project P12-FQM-
2721 (LAC). EDRF funds JAG, LAC & JMC. JJDM thanks
MICINN for a Ramon y Cajal Fellowship and MCM thanks
CSIC for her JAE Fellowshi
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