This document summarizes research on multiphase flow instrumentation and measurement techniques being developed in Brazil. It describes three sensors: 1) A resonant cavity sensor that measures water cut using resonance frequency shifts; 2) An electrical capacitance tomograph that estimates phase fractions using capacitance measurements between electrode pairs; 3) A wire-mesh sensor that provides 2D phase distribution images using conductivity or capacitance measurements at wire crossings. Experiments show the techniques can accurately measure phase fractions in oil-water and air-water flows.
BCST can make compact electromagnetic flow meter , insertion electromagnetic flow meter , JC090, JC091 , welcome to visit our website www.bcstgroup.com
Concentration measurements of bubbles in a water column using an optical tomo...ISA Interchange
Optical tomography provides a means for the determination of the spatial distribution of materials with different optical density in a volume by non-intrusive means. This paper presents results of concentration measurements of gas bubbles in a water column using an optical tomography system. A hydraulic flow rig is used to generate vertical air–water two-phase flows with controllable bubble flow rate. Two approaches are investigated. The first aims to obtain an average gas concentration at the measurement section, the second aims to obtain a gas distribution profile by using tomographic imaging. A hybrid back-projection algorithm is used to calculate concentration profiles from measured sensor values to provide a tomographic image of the measurement cross-section. The algorithm combines the characteristic of an optical sensor as a hard field sensor and the linear back projection algorithm.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
Sensoring Leakage Current to Predict Pollution Levels to Improve Transmission...Yayah Zakaria
Pollution insulator is a serious threat to the safety operations of electric power systems. Leakage current detection is widely employed in transmission line insulators to assess pollution levels. This paper presents the prediction of pollution levels on insulators based on simulated leakage current and voltage in a transmission tower.The simulation parameters are based on improved transmission line model with leakage current resistance insertion between buses. Artificial neural network (ANN) is employed to predict the level of pollution with different locations of simulated leakage current and voltage between two buses. With a sufficient number of training, the test results showed a significant potential for pollution level prediction
with more than 95% Correct Classification Rate (CCR) and output of the ANN showed high agreement with Simulink results.
BCST can make compact electromagnetic flow meter , insertion electromagnetic flow meter , JC090, JC091 , welcome to visit our website www.bcstgroup.com
Concentration measurements of bubbles in a water column using an optical tomo...ISA Interchange
Optical tomography provides a means for the determination of the spatial distribution of materials with different optical density in a volume by non-intrusive means. This paper presents results of concentration measurements of gas bubbles in a water column using an optical tomography system. A hydraulic flow rig is used to generate vertical air–water two-phase flows with controllable bubble flow rate. Two approaches are investigated. The first aims to obtain an average gas concentration at the measurement section, the second aims to obtain a gas distribution profile by using tomographic imaging. A hybrid back-projection algorithm is used to calculate concentration profiles from measured sensor values to provide a tomographic image of the measurement cross-section. The algorithm combines the characteristic of an optical sensor as a hard field sensor and the linear back projection algorithm.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
Sensoring Leakage Current to Predict Pollution Levels to Improve Transmission...Yayah Zakaria
Pollution insulator is a serious threat to the safety operations of electric power systems. Leakage current detection is widely employed in transmission line insulators to assess pollution levels. This paper presents the prediction of pollution levels on insulators based on simulated leakage current and voltage in a transmission tower.The simulation parameters are based on improved transmission line model with leakage current resistance insertion between buses. Artificial neural network (ANN) is employed to predict the level of pollution with different locations of simulated leakage current and voltage between two buses. With a sufficient number of training, the test results showed a significant potential for pollution level prediction
with more than 95% Correct Classification Rate (CCR) and output of the ANN showed high agreement with Simulink results.
Sensoring Leakage Current to Predict Pollution Levels to Improve Transmission...IJECEIAES
Pollution insulator is a serious threat to the safety operations of electric power systems. Leakage current detection is widely employed in transmission line insulators to assess pollution levels. This paper presents the prediction of pollution levels on insulators based on simulated leakage current and voltage in a transmission tower.The simulation parameters are based on improved transmission line model with leakage current resistance insertion between buses. Artificial neural network (ANN) is employed to predict the level of pollution with different locations of simulated leakage current and voltage between two buses. With a sufficient number of training, the test results showed a significant potential for pollution level prediction with more than 95% Correct Classification Rate (CCR) and output of the ANN showed high agreement with Simulink results.
Moisture content investigation in the soil samples using microwave dielectric...IJECEIAES
The microwaves of typical frequency ranges of 3 GHz to 30 GHz have been in use for remote sensing applications which are progressing rapidly. The microwaves can sense existing moisture in any material that absorbs moisture such as soil or vegetation. In case of soils which may be comprised of variable mix proportionate of solids, liquids or gases and distinct textures subjected to the associated size and the arrangements of soil particles. Hence, the moisture absorption by a specific type of soil used to be different. The inherent physical and electrical properties such as color, texture, grains, dielectric constant, conductivity or permeability, etc. differentiate various soils. In this work, authors present soil moisture measurement by simple estimation of emissivity i.e. the ratio of energy radiated by an object to absorbing the body of same physical temperature. A strategic method of measuring dielectric constant using a microwave signal is used in this research work. The measurement of the dielectric constant of the soils collected from the specific regions and analysis of results has been reported. The proposed method is less complex and can further be used for the identification of soil moisture and agricultural applications.
Rogowski coil sensor in the digitization process to detect partial dischargeTELKOMNIKA JOURNAL
This paper presents the construction of a Rogowski Coil sensor with an air core to detect partial discharge using a digital oscilloscope. Two types of sensors are used. The first is the primary sensor winding with back wire, and the second is without back wire, labeled BW and WBW, respectively. The numbers of primary-turn in the sensors are 5, 10, 20, and 40 turns. The performance of the sensors is tested using two types of tests. First, the wave response test with a fixed imitation partial discharge magnitude input is used to select the optimum sensitivity with the lower sampling rate, aims to select the peak or valley value as a magnitude partial discharge value. The second test is using an imitation partial discharge ramp to check the linearity of the sensors. The imitation of the partial discharge inputs is generated by a commercial charge calibrator. The wave response test results show an increase in the number of turns that corresponds to an increase of the sensor output for both sensors in a non-linear trend. In determining the sampling rate, the detection of magnitude in the valley is better than the peak. All sensors act linear toward the imitation partial discharge ramp either in BW or WBW conditions.
Dielectric Spectroscopy in Time and Frequency DomainGirish Gupta
This presentation describes the basics and technicalities of Dielectric Spectroscopy in both time and frequency domain. IT also includes the procedure and results involved in Dielectric Spectroscopy on different dielectrics.
Total Harmonic Distortion Analysis of Multilevel Inverter Fed To Induction Mo...IJERA Editor
This paper presents the control of a multilevel inverter supplied by a Photovoltaic (PV) panel and a batteries
bank. It is well known that the power quality of multilevel inverter signals depends on their number of levels.
However, the question that arises is whether there is a limit beyond which it is not necessary to increase the
number of level. This question is addressed in this paper. Three, nine and fifteen-level converters are studied.
The harmonics content of the output signals are analyzed. A simplified Pulse Width Modulation (SPWM)
method for a multilevel inverter that supplied an induction motor is developed. The controller equations are such
that the SPWM pulses are generated automatically for any number of levels. The effectiveness of the propose
method is evaluated in simulation. Matlab®/ Simulink is used to implement the control algorithm and simulate
the system.
A novel fuzzy based controller to reduce circulating currents in parallel int...IJECEIAES
This paper exhibits suppression strategy of low frequency circulating current components for parallel inter-leaved converters. Here inverters are parallelized by magnetically coupled inductors. Traditionally, carrier interleaved technique was used to get lower distorted output voltage, but it gives a higher circulating currents to flow through the Two-VSC‘s. The mutual inductance of the coupled inductors (CI) is utilized for minimizing circulating currents of high frequency components. Nevertheless, CI can‘t have capability to riddle the components generated by low frequency. When these circulating currents extremely increases may leads to CI saturation, elevated switching losses and diminishes the entire performance of system. Here author identified a novel control technique for a grid-connected parallel inter-leaved converter depending on approach of energy shaping control (ECS). This controller diminishes the value of the low frequency components of circulating current (LFCC). The performance of the proposed circuit is evaluated in simulation mode and correlated with the conventional proportional integral control (PIC) and the linear quadratic control (LQC). The Fuzzy controller is also included in this work to enhance the converter performance effectively and to diminish the circulating currents along with the healthy harmonic performance analysis.
The study made in this paper concerns the use of the voltage-oriented control (VOC) of three-phase pulse width modulation (PWM) rectifier with constant switching frequency. This control method, called voltage-oriented controlwith space vector modulation (VOC-SVM). The proposed control scheme has been founded on the transformation between stationary (α-β) and and synchronously rotating (d-q) coordinate system, it is based on two cascaded control loops so that a fast inner loop controls the grid current and an external loop DC-link voltage, while the DC-bus voltage is maintained at the desired level and ansured the unity power factor operation. So, the stable state performance and robustness against the load’s disturbance of PWM rectifiers are boths improved. The proposed scheme has been implemented and simulated in MATLAB/Simulink environment. The control system of the VOC-SVM strategy has been built based on dSPACE system with DS1104 controller board. The results obtained show the validity of the model and its control method. Compared with the conventional SPWM method, the VOC-SVM ensures high performance and fast transient response.
Resonant-tunneling-diode effect in Si-based double-barrier structure sputtere...IJRES Journal
This paper presents the resonant-tunneling-diode (RTD) effect in a SiO2/n-Si/SiO2/p-Si double-barrier structural thin films fabricated using radio frequency (RF) magnetron sputtering at room temperature (300 K). The implementation of a circuit prototype is first accomplished by modulating a Si-based RTD with a solar-cell bias voltage. The important electrical properties of the peak current density and peak-to-valley current ratio (PVCR) are 184 nA/cm2 and 1.67, respectively. The connection between the two RTDs in series is biased by a solar cell. The value of the switching transition time is 24.37 μs; oscillation occurs with an operating frequency of 41.6 KHz. In semiconductor applications, the developed RTD is characterized by stability, enduring environmentally elevated temperature and relative humidity.
Ultrasonic transducers are a key element that governs the performances of both generating and receiving ultrasound in an ultrasonic measurement system. Electrical impedance is a parameter sensitive to the environment of the transducer; it contains information about the transducer but also on the medium in which it is immersed. Several practical applications exploit this property. For this study, the model is implemented with the VHDL-AMS behavioral language. The simulations approaches presented in this work are based on the electrical Redwood model and its parameters are deduced from the transducer electroacoustic characteristics.
At the applied voltage a disc-shaped cavity with partial discharges are measured at variable frequency (0.01-50 Hz). By varying the frequency it was observed that measured PD phase, magnitude of distributions and number of PDs per voltage cycles are varied. In the cavity, sequence of Partial discharge is simulated dynamically. For that purpose a model is presented with charge consistent. Simulated results shows that cavity surface and emission properties are effected by varying the magnitude of applied frequency, mainly conductivity of surface. This paper is illustrating the frequency dependence of PD in a cavity. The paper illustrates how the applied voltage amplitude and the cavity size can influence the frequency dependence PD activity.
A Smart Flow Measurement System Adaptive to Different Variation Using Ultraso...Sheikh R Manihar Ahmed
This Paper Explain the Design of a Smart Flow measurement Technique using Ultrasonic Flow Meter for custody transfer quality. The objective of the work are; (i) to extend the linearity range of measurement to 100% of the input range, (ii) to make the measurement system adaptive to variations in pipe diameter, liquid density, and liquid temperature. An Accurate flow measurement is an essential requirement both from qualitative and economic points of view. Among the non contact type of flow measurement, ultrasonic flow measurement is widely used to measure flow, because of its advantage like high resolution and less interference of noise on output. However, non linear characteristics of Ultrasonic flow meters have restricted its use. An optimal Computational Logic is considered by comparing various schemes and algorithms based on minimization of Mean Square Error and Regression close to one. The output of ultrasonic flow meter is frequency. It is converted to voltage by using a frequency to voltage converter. An optimal Computational logic block is added in cascade to frequency to voltage converter. This arrangement helps to linearise the overall system for 100% of full scale and makes it adaptive to variations in pipe diameter, liquid density, and liquid temperature. Since the proposed Smart flow measurement technique produces output which is adaptive to variations in pipe diameter, liquid density, and liquid temperature, the present technique avoids the requirement of repeated calibration every time there is change in liquid, and/or pipe diameter, and/or liquid temperature. The results show that proposed measurement technique achieves the objectives quite satisfactorily.
Sensoring Leakage Current to Predict Pollution Levels to Improve Transmission...IJECEIAES
Pollution insulator is a serious threat to the safety operations of electric power systems. Leakage current detection is widely employed in transmission line insulators to assess pollution levels. This paper presents the prediction of pollution levels on insulators based on simulated leakage current and voltage in a transmission tower.The simulation parameters are based on improved transmission line model with leakage current resistance insertion between buses. Artificial neural network (ANN) is employed to predict the level of pollution with different locations of simulated leakage current and voltage between two buses. With a sufficient number of training, the test results showed a significant potential for pollution level prediction with more than 95% Correct Classification Rate (CCR) and output of the ANN showed high agreement with Simulink results.
Moisture content investigation in the soil samples using microwave dielectric...IJECEIAES
The microwaves of typical frequency ranges of 3 GHz to 30 GHz have been in use for remote sensing applications which are progressing rapidly. The microwaves can sense existing moisture in any material that absorbs moisture such as soil or vegetation. In case of soils which may be comprised of variable mix proportionate of solids, liquids or gases and distinct textures subjected to the associated size and the arrangements of soil particles. Hence, the moisture absorption by a specific type of soil used to be different. The inherent physical and electrical properties such as color, texture, grains, dielectric constant, conductivity or permeability, etc. differentiate various soils. In this work, authors present soil moisture measurement by simple estimation of emissivity i.e. the ratio of energy radiated by an object to absorbing the body of same physical temperature. A strategic method of measuring dielectric constant using a microwave signal is used in this research work. The measurement of the dielectric constant of the soils collected from the specific regions and analysis of results has been reported. The proposed method is less complex and can further be used for the identification of soil moisture and agricultural applications.
Rogowski coil sensor in the digitization process to detect partial dischargeTELKOMNIKA JOURNAL
This paper presents the construction of a Rogowski Coil sensor with an air core to detect partial discharge using a digital oscilloscope. Two types of sensors are used. The first is the primary sensor winding with back wire, and the second is without back wire, labeled BW and WBW, respectively. The numbers of primary-turn in the sensors are 5, 10, 20, and 40 turns. The performance of the sensors is tested using two types of tests. First, the wave response test with a fixed imitation partial discharge magnitude input is used to select the optimum sensitivity with the lower sampling rate, aims to select the peak or valley value as a magnitude partial discharge value. The second test is using an imitation partial discharge ramp to check the linearity of the sensors. The imitation of the partial discharge inputs is generated by a commercial charge calibrator. The wave response test results show an increase in the number of turns that corresponds to an increase of the sensor output for both sensors in a non-linear trend. In determining the sampling rate, the detection of magnitude in the valley is better than the peak. All sensors act linear toward the imitation partial discharge ramp either in BW or WBW conditions.
Dielectric Spectroscopy in Time and Frequency DomainGirish Gupta
This presentation describes the basics and technicalities of Dielectric Spectroscopy in both time and frequency domain. IT also includes the procedure and results involved in Dielectric Spectroscopy on different dielectrics.
Total Harmonic Distortion Analysis of Multilevel Inverter Fed To Induction Mo...IJERA Editor
This paper presents the control of a multilevel inverter supplied by a Photovoltaic (PV) panel and a batteries
bank. It is well known that the power quality of multilevel inverter signals depends on their number of levels.
However, the question that arises is whether there is a limit beyond which it is not necessary to increase the
number of level. This question is addressed in this paper. Three, nine and fifteen-level converters are studied.
The harmonics content of the output signals are analyzed. A simplified Pulse Width Modulation (SPWM)
method for a multilevel inverter that supplied an induction motor is developed. The controller equations are such
that the SPWM pulses are generated automatically for any number of levels. The effectiveness of the propose
method is evaluated in simulation. Matlab®/ Simulink is used to implement the control algorithm and simulate
the system.
A novel fuzzy based controller to reduce circulating currents in parallel int...IJECEIAES
This paper exhibits suppression strategy of low frequency circulating current components for parallel inter-leaved converters. Here inverters are parallelized by magnetically coupled inductors. Traditionally, carrier interleaved technique was used to get lower distorted output voltage, but it gives a higher circulating currents to flow through the Two-VSC‘s. The mutual inductance of the coupled inductors (CI) is utilized for minimizing circulating currents of high frequency components. Nevertheless, CI can‘t have capability to riddle the components generated by low frequency. When these circulating currents extremely increases may leads to CI saturation, elevated switching losses and diminishes the entire performance of system. Here author identified a novel control technique for a grid-connected parallel inter-leaved converter depending on approach of energy shaping control (ECS). This controller diminishes the value of the low frequency components of circulating current (LFCC). The performance of the proposed circuit is evaluated in simulation mode and correlated with the conventional proportional integral control (PIC) and the linear quadratic control (LQC). The Fuzzy controller is also included in this work to enhance the converter performance effectively and to diminish the circulating currents along with the healthy harmonic performance analysis.
The study made in this paper concerns the use of the voltage-oriented control (VOC) of three-phase pulse width modulation (PWM) rectifier with constant switching frequency. This control method, called voltage-oriented controlwith space vector modulation (VOC-SVM). The proposed control scheme has been founded on the transformation between stationary (α-β) and and synchronously rotating (d-q) coordinate system, it is based on two cascaded control loops so that a fast inner loop controls the grid current and an external loop DC-link voltage, while the DC-bus voltage is maintained at the desired level and ansured the unity power factor operation. So, the stable state performance and robustness against the load’s disturbance of PWM rectifiers are boths improved. The proposed scheme has been implemented and simulated in MATLAB/Simulink environment. The control system of the VOC-SVM strategy has been built based on dSPACE system with DS1104 controller board. The results obtained show the validity of the model and its control method. Compared with the conventional SPWM method, the VOC-SVM ensures high performance and fast transient response.
Resonant-tunneling-diode effect in Si-based double-barrier structure sputtere...IJRES Journal
This paper presents the resonant-tunneling-diode (RTD) effect in a SiO2/n-Si/SiO2/p-Si double-barrier structural thin films fabricated using radio frequency (RF) magnetron sputtering at room temperature (300 K). The implementation of a circuit prototype is first accomplished by modulating a Si-based RTD with a solar-cell bias voltage. The important electrical properties of the peak current density and peak-to-valley current ratio (PVCR) are 184 nA/cm2 and 1.67, respectively. The connection between the two RTDs in series is biased by a solar cell. The value of the switching transition time is 24.37 μs; oscillation occurs with an operating frequency of 41.6 KHz. In semiconductor applications, the developed RTD is characterized by stability, enduring environmentally elevated temperature and relative humidity.
Ultrasonic transducers are a key element that governs the performances of both generating and receiving ultrasound in an ultrasonic measurement system. Electrical impedance is a parameter sensitive to the environment of the transducer; it contains information about the transducer but also on the medium in which it is immersed. Several practical applications exploit this property. For this study, the model is implemented with the VHDL-AMS behavioral language. The simulations approaches presented in this work are based on the electrical Redwood model and its parameters are deduced from the transducer electroacoustic characteristics.
At the applied voltage a disc-shaped cavity with partial discharges are measured at variable frequency (0.01-50 Hz). By varying the frequency it was observed that measured PD phase, magnitude of distributions and number of PDs per voltage cycles are varied. In the cavity, sequence of Partial discharge is simulated dynamically. For that purpose a model is presented with charge consistent. Simulated results shows that cavity surface and emission properties are effected by varying the magnitude of applied frequency, mainly conductivity of surface. This paper is illustrating the frequency dependence of PD in a cavity. The paper illustrates how the applied voltage amplitude and the cavity size can influence the frequency dependence PD activity.
A Smart Flow Measurement System Adaptive to Different Variation Using Ultraso...Sheikh R Manihar Ahmed
This Paper Explain the Design of a Smart Flow measurement Technique using Ultrasonic Flow Meter for custody transfer quality. The objective of the work are; (i) to extend the linearity range of measurement to 100% of the input range, (ii) to make the measurement system adaptive to variations in pipe diameter, liquid density, and liquid temperature. An Accurate flow measurement is an essential requirement both from qualitative and economic points of view. Among the non contact type of flow measurement, ultrasonic flow measurement is widely used to measure flow, because of its advantage like high resolution and less interference of noise on output. However, non linear characteristics of Ultrasonic flow meters have restricted its use. An optimal Computational Logic is considered by comparing various schemes and algorithms based on minimization of Mean Square Error and Regression close to one. The output of ultrasonic flow meter is frequency. It is converted to voltage by using a frequency to voltage converter. An optimal Computational logic block is added in cascade to frequency to voltage converter. This arrangement helps to linearise the overall system for 100% of full scale and makes it adaptive to variations in pipe diameter, liquid density, and liquid temperature. Since the proposed Smart flow measurement technique produces output which is adaptive to variations in pipe diameter, liquid density, and liquid temperature, the present technique avoids the requirement of repeated calibration every time there is change in liquid, and/or pipe diameter, and/or liquid temperature. The results show that proposed measurement technique achieves the objectives quite satisfactorily.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Welocme to ViralQR, your best QR code generator.ViralQR
Welcome to ViralQR, your best QR code generator available on the market!
At ViralQR, we design static and dynamic QR codes. Our mission is to make business operations easier and customer engagement more powerful through the use of QR technology. Be it a small-scale business or a huge enterprise, our easy-to-use platform provides multiple choices that can be tailored according to your company's branding and marketing strategies.
Our Vision
We are here to make the process of creating QR codes easy and smooth, thus enhancing customer interaction and making business more fluid. We very strongly believe in the ability of QR codes to change the world for businesses in their interaction with customers and are set on making that technology accessible and usable far and wide.
Our Achievements
Ever since its inception, we have successfully served many clients by offering QR codes in their marketing, service delivery, and collection of feedback across various industries. Our platform has been recognized for its ease of use and amazing features, which helped a business to make QR codes.
Our Services
At ViralQR, here is a comprehensive suite of services that caters to your very needs:
Static QR Codes: Create free static QR codes. These QR codes are able to store significant information such as URLs, vCards, plain text, emails and SMS, Wi-Fi credentials, and Bitcoin addresses.
Dynamic QR codes: These also have all the advanced features but are subscription-based. They can directly link to PDF files, images, micro-landing pages, social accounts, review forms, business pages, and applications. In addition, they can be branded with CTAs, frames, patterns, colors, and logos to enhance your branding.
Pricing and Packages
Additionally, there is a 14-day free offer to ViralQR, which is an exceptional opportunity for new users to take a feel of this platform. One can easily subscribe from there and experience the full dynamic of using QR codes. The subscription plans are not only meant for business; they are priced very flexibly so that literally every business could afford to benefit from our service.
Why choose us?
ViralQR will provide services for marketing, advertising, catering, retail, and the like. The QR codes can be posted on fliers, packaging, merchandise, and banners, as well as to substitute for cash and cards in a restaurant or coffee shop. With QR codes integrated into your business, improve customer engagement and streamline operations.
Comprehensive Analytics
Subscribers of ViralQR receive detailed analytics and tracking tools in light of having a view of the core values of QR code performance. Our analytics dashboard shows aggregate views and unique views, as well as detailed information about each impression, including time, device, browser, and estimated location by city and country.
So, thank you for choosing ViralQR; we have an offer of nothing but the best in terms of QR code services to meet business diversity!
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
3. Introduction...
In many industrial activities, the so-called multiphase flow is commonly found, which denotes the
simultaneous stream of two or more distinct substances. A typical example is oil-gas and/or oil-water
mixtures flowing through production pipelines in the petroleum industry. Flow behavior often
determines the efficiency and safety of plants and equipment where multiphase flow is present.
Therefore, monitoring of such flows and derived parameters is highly desired in many applications. In
the past, a number of measurement techniques and instruments have been developed and applied .
Multiphase flow instrumentation relies on a number of physical principles, including common
instrumentation and measurements that are based on electrical, sonic or radiation methods. This
paper shows three different sensors currently being developed in Brazil, which are based on electrical
measurements. They range from a simple phase concentration measurement up to multiphase flow
imaging. Each instrument offers a tailored solution with potential either for field applications or for
detailed multiphase flow investigation in pilot plant studies.
4. Resonant Cavity Water-cut Sensor...
Resonant cavities are metallic devices where energy is stored in the electromagnetic
fields inside them. The resonance occurs when the average energy stored in the
electric field is equal to the average energy stored in the magnetic field, resulting in a
maximum concentration of energy inside the cavity. The geometry of the cavity, as well
as the dielectric characteristics of the material inside it, define its resonance frequency.
The resonance frequency is used as the measurement parameter, and it is related to
different measurement quantities, for instance, the water fraction in two-phase flows.
Measurements using water/oil and water/air stratified mixtures with fresh water and
seawater were performed in , showing that this technology presents adequate
accuracy for this application.
5. In , impedance matching networks for the resonant cavity sensor presented in were implemented
to of the measurements. The resonant cavity sensor consists of a PVC pipe inside a metallic
cylinder, as shown in detail in Fig. 1. The resonance frequency fr, considering the TE111
(transverse electric propagation mode in a circular waveguide), is given by
where k=5.69 m−1 is a constant dependent on the geometry of the cavity, c is the speed of the light
in vacuum, and εm is the effective permittivity of the mixture flowing inside the sensor's PVC
pipeline which is a function of the water fraction. In this case, as a function of the effective
permittivity, the resonance frequency is measured by an external circuit using the amplitude or
phase information of the transmission signal
6. Finally, the information is processed by a digital signal processing (DSP) stage and is associated with
the current water fraction. Fig. 1 shows the sensor (in detail) coupled to the circuit, which consists of a
phase locked-loop mechanism, where the resonance frequency is tracking according to the phase shift
caused by the water fraction flowing inside the PVC pipe. we can see the response curve of the
system, which relates the output voltage signal of the circuit to the percentage of water. This curve can
be identified and approximated by a fourth-degree polynomial equation.
7. Electrical Capacitance Tomometry
In conventional volume-fraction measurement methods based on classical
electrical capacitance tomography (ECT), volume fraction values are
estimated by the cross-sectional images of permittivity distribution in two-
phase flow. A high-quality image is necessary to determine the volume fraction
precisely . Because reconstructing a high-quality image needs a complex and
time-consuming image reconstruction algorithm, it is difficult to meet the real-
time requirement of the on-line measurement Unlike the combining electrode
strategy applied to an ECT sensor, in the proposed method known as
electrical capacitance tomometry (ECTM), the number of grouped electrodes
is fixed, resulting in all measurements from just two electrodes . Thus, the
SNR remains the same as that of the two electrode sensor
8. Resonant cavity water cut meter coupled to
measurement circuit and the system response
9. A) COMBINING
CONFIGURATIONS FOR
AN ECTM SENSOR. THE
CIRCLED “1” AND “2”
DENOTE RESULTING
EXCITATION AND
MEASURING
ELECTRODES.
(B) SCHEMATIC
DIAGRAM OF THE
MEASUREMENT CHAIN.
10. • After carrying out N capacitance measurements, the Landweber Iteration method [6] is
used to estimate the normalized permittivity distribution (or normalized pixel values, gˆ(i))
and the water volume fraction is calculated by
• where Φ is the water volume fraction, M is the total number of pixels, gˆ(i) is the value of
the I'th pixel, and gˆ h (i) is the value of the I'th pixel when the sensor is filled with the
higher permittivity material (nominally 1)
• Thus, the SNR remains the same as that of the twoelectrode sensor. After measuring the
capacitance value (Fig. 2a), the electrodes are recombined, as shown in Configuration 2.
The same measurement procedure is carried out until the total number of non-combined
electrodes (N) rotations is implemented. For this work, the available number of
capacitance measurements is twelve
11. Experimental Results
Experiments were carried out to evaluate the performance of the proposed method by using
static and dynamic stratified flow patterns. The ECTM sensor was built on a 76 mm
diameter polypropylene pipe. The twelve electrodes were fixed on the outer surface of the
pipe, each covered 28° along the circumference and 100 mm along the axial direction. At
each end of the electrodes, a 50 mm wide circular copper foil was fixed as grounded guard-
electrodes. Involving an external part of the sensor, a grounded shield was mounted to
protect the circuit from external electromagnetic fields. The ECTM system included a
500kHz sine wave generator, electrode control and DAQ modules. The NI PCI6259 DAQ
card was used to send switching control commands to the circuit and acquire the ac voltage
signal proportional to the capacitance. Fig. 3 shows the developed system
12. Overview of the ECTM system: (1) A sensor
with 12 electrodes, (2) Data acquisition, (3)
Electrode control module, and (4) Waveform
generator
13. 4. Static experimental results for stratified two-
phase oil-water mixture
5. ECTM sensor response in dynamic
experiments for air-water twophase flow.
14. Wire-mesh Sensor...
Wire-mesh Sensor A technique similar to flow tomography is a wire mesh sensor . It
provides two-dimensional phase images of multiphase flow without the need to solve an
inverse problem. The sensor is a hybrid solution between invasive local measurement of
phase fraction and tomographic cross-sectional imaging. The sensor comprises of two sets
of wires stretched over the cross-section of a vessel or pipe. The planes of wires are
perpendicular to each other, thus forming a grid of electrodes. The associated electronics
measure an electrical property of the flowing media at each crossing point. Based on those
measurements and knowing a priori the electrical properties of the substances involved in
the flow, the sensor is thus able to determine instantaneous fluid distribution over the cross-
section. The first generation of wire-mesh sensors is based on conductivity measurements
[6], thus able to investigate electrically conducting fluids only. They are typically air-water
and steam-water systems, since it is only suitable to investigate flows where one phase is a
conductive medium
15. Typically the medium has electrical conductivity of at least 0.5 μS/cm. Wire-mesh sensors based
on capacitance (permittivity) measurements were introduced by Da Silva et al. due to the
importance of investigating the occurrence of non-conducting fluids, for instance, oil or organic
liquids, in several industry applications. The phase fraction distributions in a flow cross section,
such as in a pipe or another vessel, can be determined by discriminating fluids with different
permittivity values. However, this technique presents some limitations, and up to now investigated
flow phenomena could comprise only two substances, mainly gas-liquid or liquid-liquid but also
solid liquid flows In recent years, some efforts have been made to improve the range of application
by applying dual-modality. measuring techniques in which two different sensing techniques are
used to distinguish more than two substances. Therefore, a capacitive/conductive wire-mesh
sensor was proposed in by which signal excitation composed of two distinct frequencies is applied
to interrogate each crossing point of a mesh sensor. Each frequency is linked to either the
conductive or the capacitive part of the fluid's electrical property.
17. 7. Visualization of wire-mesh sensor data for
superficial gas velocity of jG = 2.5 m/s and
different liquid superficial velocity range of 0.25
m/s to 2.50 m/s.
18. Flow Measurement...
The measurements were conducted in a test facility of the Multiphase Flow Research
Center at Federal University of Technology - Paraná (NUEM/UTFPR). The facility
consisted of a horizontal acrylic pipe of 25.8 mm internal diameter and total length of
~9 m. Tap water was circulated in a closed loop with the help of a pump and a
gravitational separator/storage tank. Air was injected into the pipe through a
compressor to form a two-phase flow. Flow rates of both fluids were independently
measured. The wire-mesh sensor was located at 7.5 m from the pipe entrance.
Experiments were performed at gas superficial velocities of 2.5 m/s and at liquid
superficial velocity range of 0.25 m/s to 2.50 m/s. The wire-mesh sensor (with 12 × 12
wires) was set up to acquire images of the flow at 5,000 fps during 5 s.
19. . Axial slice images of flow experiment: (a)
Permittivity distribution. (b) Conductivity
distribution. (c) Fused image of phase
distribution
20. The transition of a few different flow regimes can be visualized in the
temporal evolution of the phase fraction values taken from the crossing
points along the central electrode. Thus, such an image provides a side
view of the flow on a horizontal plane cut through the pipe along its
vertical axis. The gaseous phase is represented by a dark color and the
liquid phase by a bright one. The horizontal axis represents the time of
5 s. show the system's capability, dynamic tests were also performed. A
multiphase flow loop at Federal University of Santa Catarina was
capable of providing gas-water flows at several flow regimes (bubble,
annular, slug, and stratified). This flow loop had a 3 in (7.62 cm) inner
diameter and a 5 m long test section. Air and water mixtures at different
conditions were monitored with the ECTM sensor. For each
experimental test, a reference water volume fraction was obtained by
means of a quick closing valve method. The estimated water volume
fraction is depicted
This Photo by Unknown author is licensed under CC BY-SA.
21. Gas-Liquid-Liquid Three-phase Mixtures
Dual-modality wire-mesh sensors have been used to investigate three-phase gas-oil-water
flows, generating images of conductivity and permittivity distributions over a pipe cross
section . A pipe segment was filled with air, oil, and water and was shaken in such way to
produce waves on the stratified mixture. The agitation process was monitored by the wire-
mesh sensor (with 16 × 16 wires) installed in the middle of the pipe section. depicts axial
slice images which were produced by taking the values from electrode number 4, i.e.,
along a central chord of the pipe. show measured permittivity and conductivity,
respectively. To convert this pair of images into phase fraction distributions, appropriate
methods of data fusion must be employed, obtaining individual phase fraction of gas-oil-
water flow. In, a parameter model is fitted to the measured electrical parameters
distributions, which is then applied to obtain phase fraction from measured data. shows
the obtained fused image for the phase fractions.
22. CONCLUSION
a short review is given of the Brazilian research landscape of multiphase
flow instrumentation. Three different sensor systems for multiphase flow
monitoring based on electrical measurements have been presented.
Hence, water content in oil-water flow can be correctly determined by a
microwave resonant cavity sensor. A second sensor based on multiple
capacitance measurements, known as an ECTM sensor, correctly
determines the void fraction of gas-liquid two-phase flow. Finally, a wire-
mesh sensor allows detailed images to be generated of flow behavior
based on impedance or complex permittivity measurements. Each of the
instrumentation presented can produce reliable data for future application
in research studies or industry
23. This Photo by Unknown author is licensed under CC BY-SA.