Top PDF Device for Monitoring - Warning Frequency Generator

Device for Monitoring - Warning Frequency Generator

Device for Monitoring - Warning Frequency Generator

Power quality was assessed by two parameters voltage and frequency, the voltage changes are of a local property, and change the frequency – systematic. Frequency deviation in the grid due to an imbalance in power between the generator and the load will affect the economic and technical indicators of power stations, as well as consumers. To ensure the stability and reliability of the electric system and generator protection to prevent damage during the operation, it is necessary and indispensable device monitoringwarning frequency generator in power stations.
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Preliminary study of a non-invasive portable device for continuous monitoring of blood alcohol concentration

Preliminary study of a non-invasive portable device for continuous monitoring of blood alcohol concentration

evaluated and tested on real alcoholic beverage samples. The results agreed with those certified by the suppliers. The ethanol biosensor has a promising application in ethanol analysis due to the simple, practical and disposable features of the device without requiring laborious sample pre- treatment producers. Gamella et al. [19] developed an electrochemical biosensing device for determining the blood’s ethanol content (BAC). The prototype is based on bienzyme amperometric composite biosensors that are sensitive to the variation of ethanol concentration. Thus, the determination of BAC is performed by amperometric monitoring of ethanol in sweat. The BAC determination in single measurement or in continuous modes. The validation of the obtained results using the proposed device was performed by 40 volunteers. The obtained results were compared with results obtained by the gas chromatographic reference method. No significant differences between both methods was found. This paper describes a portable non- invasive device intended for real-time detection of alcohol in the blood. Although the mobile feature was part of the technical specifications of the above-mentioned devices, the portability feature is only common to the device developed by Gamella et al. [19]. After ingestion 80% of the alcohol is absorbed by the stomach and the intestine [20]. After being absorbed, is then released by the sweat, urine and breathe [21]. In this way, this device uses the sweat to monitor the ingested alcohol. This device causes sweating at the site of measurement and subsequently carries out the measurement of the amount of alcohol in sweat and relates it with the existing amount in the blood. The goal is that the user, as soon as it starts to ingest alcohol, turns on the device so that
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Monitoring device of ice formation in evaporator surface of refrigeration systems

Monitoring device of ice formation in evaporator surface of refrigeration systems

Experimental tests using an air-handling unit (AHU) and its respective evaporator were developed for air velocities of 2 m/s. The sensor is able to distinguish between the different physical states of water for this air velocity. The device indicated the presence of ice formation when the temperature of the air at the evaporator outlet began to rise for the test with air velocity of 2 m/s. Note that cooling capacity loss that is consequence of the ice formation. Upon the ice formation on the surface of the evaporator is expected that the temperature of its surface undergo an abrupt decrease. This condition occurs at the same time that the sensor detects the ice formation and increasing the outlet temperature of the evaporator starts to rise. The range of voltage results related to the ice formation was determined. An electronic circuit capable of automating the entire process is designed and sized. The results show that both the circuit configuration and the concept have potential to be used as ice formation monitoring devices. Some adjustments have to be included in the device to achieve a widespread application level.
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Development of a monitoring device of fruit products along the cold chain

Development of a monitoring device of fruit products along the cold chain

During food transportation, products are often subject to conditions which in no way promote the conservation of their biological properties. As a result of this loss of quality, there is a decrease in appreciation under the product. But more important than the loss of economic value is food waste. Remote monitoring systems, whose fundamental requirements relate to range and autonomy, make use of communications technologies to map characteristic crop parameters to reduce unnecessary application of resources or materials. This article proposes a monitoring system to record the conservation conditions inside refrigeration plants and vehicles, transmitting them via the internet of Things (IoT). This device is composed of an ARDUINO UNO Rev3 microcontroller that acquires the temperature and relative humidity every 5 minutes by means of a DHT 11 sensor, and uses the SIM800L module that provides real time communication data via GSM. It also incorporates a 3.7 V - 2600mAh battery which gives you an approximate 60 hour power range.
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IP Based Device Control and Monitoring System Using Raspberry Pi Based On IOT

IP Based Device Control and Monitoring System Using Raspberry Pi Based On IOT

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A noninvasive monitoring device for anesthetics in fish

A noninvasive monitoring device for anesthetics in fish

to monitor and record fish activity accurately (see Figure 1). The device was capable of recording both gill and lateral fin movements, which were then analyzed in terms of initial and post-treatment activity frequency (Hz). Activity signals were recorded via an ML 132 amplifier connected to a ML 780 PowerLab/8S A/D converter connected to an iBook G4 running Chart5 v.5.4 Software (AD Instruments, Australia). The data recording was at a sampling speed of 40,000 data samples per second (40 kHz) and the input impedance of the amplifier was 200 m Ω differential. Decline in activity was defined as being either or both a reduction in signal amplitude (mV, constituting less powerful fin and gill movements), or signal frequency (Hz, constituting an increase in time between repeated movements of fins and gills).
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Rev. Bras. Anestesiol.  vol.62 número6 en v62n6a15

Rev. Bras. Anestesiol. vol.62 número6 en v62n6a15

presents limitations, augmented reality represents a starting point for future clinical trials of HMD device use by anesthesi- ologists for intraoperative monitoring, providing all the [r]

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Characterization of Physiological Glucose Concentration Using Electrical Impedance Spectroscopy

Characterization of Physiological Glucose Concentration Using Electrical Impedance Spectroscopy

The first complete non invasive glucose monitoring device was approved in 2003 [13] in EU named Pendra by Pendragon Medical Ltd. was based on EIS presented in [14]. The device was based on the measurement of modulus of impedance at resonant frequency (minimum impedance) which was a variable of blood glucose concentration. But when it was in the market for home use, showed less precision as the correlation coefficient was only 0.64 with only 56% data in acceptable range [15]. This is because the resonant frequency can be changed in blood due to elements other than glucose which has not been compensated in Pendra. On the other hand, impedance spectroscopy using voltage current pulse technique presented in this paper, directly measures the electrical nature of blood where the effect of other elements than blood can be compensated easily using proper circuit modeling.
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On the applications of a compact autonomous acoustic recorder

On the applications of a compact autonomous acoustic recorder

the sense that it has been a significant factor for the design of effective measurement strategies, due to its funcionality and easy availability of multiple units. It responds to a widespread tendency where miniaturized and portable devices are required for allowing small teams, often of one or two person, to carry on there activities when reduced material resources are available to cover a large area (let’s say 10 km×10 km). This paper describes this new recording device, and reviews a number potential applications of this device, including underwater noise monitoring, acoustic inversions, and passive acoustic monitoring of marine mammals.
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Zebrafish on a chip: a novel platform for real-time monitoring of drug-induced developmental toxicity.

Zebrafish on a chip: a novel platform for real-time monitoring of drug-induced developmental toxicity.

[13]. Recently, a multi-channel microfluidic perfusion platform was developed for culturing single zebrafish embryos and capturing live images of various tissues and organs inside the embryo [14–16]. Another approach for single embryo observation was developed by immobilizing individual eggs in microfabricated holes with culture solution flowing underneath [17]. Regrettably, both the chamber and the micro-hole are too small to manipulate dozens of embryos at one concentration. To address these issues, we fabricated an integrated microfluidic device composed of two parts [18]. One part of the device was composed of an open culture room array containing several embryos. Each culture room was simultaneously exposed to an upstream gradient of doxoru- bicin generated from another part of the chip. However, we found that the sloped chip design that facilitated the removal of waste did not allow for the real-time imaging of the fish embryo. Additionally, the glass based chip material was not biocompatible, to some extent, with live system that required gas exchange.
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Radio frequency system for remote fish monitoring in aquaculture

Radio frequency system for remote fish monitoring in aquaculture

Radio frequency identification (RFID) is a wireless technology which uses radio frequency (RF) signals for communication between the device attached to objects or animals (including humans), and a receiving equipment placed at a distance away. RFID technology does not require the transmitter to be in direct contact or in line-of-sight with a receiver in order to transmit data. Comparing with conventional methods of identification such as bar-code and optical character recognition systems, RFID technology provides several advantages. Higher read range, identification of devices in remote locations, reliable reading in harsh environments, faster data transmission and the possibility of reading multiple devices at the same time are some of the advantages [37]. RFID technology provides a wide range of applications such as access control, electronic toll collection and animal identification, tracking and sensing [38].
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Rev. Bras. Eng. Bioméd.  vol.30 número2

Rev. Bras. Eng. Bioméd. vol.30 número2

Abstract Introduction: When a gas is used for therapy, often the kinetic behavior and their distribution in biological systems is not known, leading to unsatisfactory results for clinical application. The use of ozone in living organisms has been scientiically released worldwide under the name of ozone therapy. The eficacy of this technique is determined primarily by the diffusion of gas within the tissues or luids and which determines their action in the entire target region. We propose the development of technique to monitoring the O 3 dissolved in the biological luid using an optical device operating in the red-infrared region. Methods: The recombination of O 3 in O 2 enables the monitoring of the latter by the measurement of SpO 2 , and, based on this phenomenon, we propose to use an optical device operating in the red-infrared region to monitoring indirectly the diffusion of O 3 in luids. The system was based on optomechanical arrangement using a capsule containing luid that was ozonated or oxygenated during the process. A pulse oximeter is a noninvasive device used for continuously measure of SpO 2 resulting from the recombination of ozone. Results: The measurements of SpO 2 when subjected to ozone and oxygen, showed an increased rate of SpO 2 function of time for both cases reaching its peak in 80s and 160s, respectively. The experimental data concerning the SpO 2 saturation as a function of time can be itted by the theoretical model, showing a good correlation between them. Conclusion: A technique was developed using an optical device operating in the red-infrared region to monitoring ozone dissolved in biological luid, showing a simple and effective way to indirectly monitoring the presence of ozone in luids. Keywords Ozone, Biological luid, Diffusion, Recombination, Optical device, Red-infrared region.
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Licenciatura em Ciência dos Materiais

Licenciatura em Ciência dos Materiais

EIS studies were performed in Ag/paper/Zn-Ag with 5 M KOH device. The obtained Nyquist plot shape, in figure 26, is very similar to the ones obtained for Li-ion batteries [53]–[55]. As in Li-ion batteries, Ag/paper/Zn-Ag 5 M KOH device Nyquist plot forms in the high frequency region (frequency increases from right to left) a small curvature that intersects the abscissa axis, revealing battery’s inductance and ohmic resistance. The charge transfer reactions at electrodes’ surfaces are reflected by the presence of a depressed semi-circle in the middle-frequency region, that in the case of the device in study, is not as pronounced as in for Li-ion batteries. In the meddle-low-frequency region it is possible to see a straight line with positive slope, which is caused by diffusion. Although, it was not possible to set an equivalent electric circuit for Ag/paper/Zn-Ag device, it is clear that the working mechanism is similar to Li-ion batteries. Moreover, it is important to remember that the compared devices are different among each other, starting with their structure; fabrication; encapsulation; electrolyte; separator; electrodes and other key characteristics and/or components.
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Arq. Bras. Cardiol.  vol.92 número1

Arq. Bras. Cardiol. vol.92 número1

explanation for this behavior has not been fully defined in the literature. On the other hand, in relation to DBP, a significant difference was only found in the first measurement. Despite these differences, the SBP and DBP values provided by the Omron HEM 742 and by the mercury device were not significantly different between the three measurements when compared with each other, thus suggesting good data reproducibility in both devices.

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Early Warning System para distress bancário no Brasil

Early Warning System para distress bancário no Brasil

Para estimar um early warning system para bancos brasileiros, o presente estudo adota a abordagem proposta por González-Hermosillo (1999) a partir de um novo conjunto de dados de eventos de distress bancário que engloba 359 bancos, sendo detectados 179 episódios de distress, utilizando indicadores microeconômicos do tipo CAMELS dos bancos brasileiros, juntamente com indicadores macroeconômicos e com indicadores do sistema bancário brasileiro. Além de considerar os casos de insolvência (Liquidação Extrajudicial) como episódios de distress, o conjunto de dados é complementado por casos de Regime Especial de Administração Temporária (RAET), intervenção, Programa de Estímulo à Reestruturaão e e a o Fortalecimento do Sistema Financeiro Nacional (PROER), privatizações no âmbito do Programa de Incentivo à Redução do Setor Público Estadual na Atividade Bancária (PROES), fusões e incorporações, transformação em outro tipo de instituição financeira e em instituições não-financeiras, além de cancelamentos da licença para funcionamento. O foco do estudo está na detecção das vulnerabilidades adjacentes e em encontrar padrões comuns que possam preceder crises financeiras.
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Damping Of Low Frequency Oscillations In Power System Using  Device Upfc With Fuzzy Logic

Damping Of Low Frequency Oscillations In Power System Using Device Upfc With Fuzzy Logic

type of fuzzy rules used. If a fuzzy controller uses the TS type of fuzzy rules, it is called a TS fuzzy controller. Otherwise, the controller is named a Mamdani fuzzy controller. Throughout this paper, attention is focused on the Mamdani type fuzzy controller in order to damp the low frequency oscillationsof the power system.

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Automatic implementation of a re-configurable logic over ASIC design flow

Automatic implementation of a re-configurable logic over ASIC design flow

One of the solutions to transform an ASIC fixed logic design to programmable devices is to buy eFPGA devices to act as replacements. However, sellers usually sell architecture that may not be ideal for a application as some parameters like number of LUTs are often predefined by the seller. While this approach can be seen fit for developing a device capable of implementing a broad range of application, it is not ideal for the case of an ASIC developer. Therefore, a need arises to create a design flow, which could be included in a normal workflow of an ASIC designer, giving him the ability to produce a re-programmable device without many designer interventions. So, this dissertation following main objectives will be materialized in the purposed design flow:
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DYNAMIC RESPONSE OF WIND POWER GENARATORS USING STATCOM

DYNAMIC RESPONSE OF WIND POWER GENARATORS USING STATCOM

generator, there are certain requirements for minimum rotor speed and capacitance value that must be met. When capacitors are connected across the stator terminals of an induction machine, driven by an external prime mover, voltage will be induced at its terminals. The induced emf and current in the stator windings will continue to rise until steady state is attained. At this operating point the voltage and current will continue to oscillate at a given peak value and frequency. The rise of the voltage and current is influenced by the magnetic saturation of the machine. In order for self-excitation to occur with a particular capacitance value there is a corresponding minimum speed.
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Interferência em comunicações Device-to-Device D2D

Interferência em comunicações Device-to-Device D2D

Para tal, esta análise apoiou-se no desenvolvimento de vários cenários da comunicação D2D dentro da estrutura de rede celular LTE-A usando simuladores já existentes, de sis[r]

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