This document describes the design and construction of a concentric cylinder viscometer that allows for highly accurate viscosity measurements at extremely low shear stresses. The viscometer uses a single rotating cylinder (rotor) inside a fixed outer cylinder (stator) and can measure viscosities with shear stresses as low as 0.003-0.0008 dynes/cm2. Experimental results show the viscometer was able to detect a phase transition in solutions of poly-(butylisocyanate) in carbon tetrachloride as temperature was varied.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
The document discusses unsaturated water flow in pavements. It aims to understand how water moves through pavement structures, how long it remains, and what factors control moisture conditions. It compares saturated versus unsaturated flow, and notes unsaturated flow is slower. It describes using actual pavement geometries and material properties in a finite element model to calibrate predictions of water content from sensors to observed field data. The model is adjusted based on precipitation data and material densities to improve prediction accuracy at different sensor locations within the pavement structure.
The document describes the Volume of Fluid (VOF) model for simulating flows with interfaces between multiple immiscible fluids. The VOF model tracks the volume fraction of each fluid throughout the domain using a single set of momentum equations shared between the fluids. It is designed for fluids where the interface is of interest, such as large bubbles, dam breaks, or liquid-gas interfaces. The document provides examples of simulating a dam break using the VOF model and discusses the model's steady state and time dependent capabilities as well as auxiliary models that can be used with it.
This document presents experimental research on streamer propagation and breakdown in synthetic ester, natural ester, and mineral oil liquids with pressboard interfaces under lightning impulse voltages. Tests were conducted using a point-plane electrode system with pressboard placed parallel to the electric field. Results show that:
1) Streamers on ester/pressboard interfaces propagate further than on mineral oil/pressboard interfaces at the same voltage levels.
2) Introducing parallel pressboard does not influence streamer stopping length or weaken breakdown voltage up to gap distances of 75mm under both polarities.
3) Presence of parallel pressboard reduces acceleration voltage in mineral oil but has little influence on esters under positive polarity
1. Ultracentrifugation uses high centrifugal forces to separate particles in solution based on differences in size, shape, density, and other properties.
2. It was invented in the 1920s and allows for separations not possible with lower speed centrifuges.
3. There are two main types - analytical ultracentrifugation which analyzes samples during centrifugation, and preparative ultracentrifugation which isolates and purifies particles.
Floating power plants (FPPs) are mobile offshore power generation facilities that can be rapidly deployed to supply electricity to areas in need. One of the earliest FPPs was constructed in 1940 in the Philippines and is still operational today in Ecuador. Countries in Southeast Asia and South America have utilized FPPs to address severe power shortages. FPPs are designed to operate like ships on water, generating power while remaining stable without rotational movement as water levels change. Recent FPP developments include diesel, wind, and tidal energy powered models.
This document discusses different types of viscometers used to measure the viscosity of fluids. It describes the theory, operation, and applications of three common viscometers: the Redwood viscometer, Ubbelohde viscometer, and Hoppler viscometer. The Redwood viscometer measures viscosity based on the flow of liquid through an orifice. The Ubbelohde viscometer is a capillary tube viscometer that times liquid flow between marks. The Hoppler viscometer determines viscosity from the terminal velocity of a ball falling through a liquid in a tube. Each viscometer has advantages for certain applications like petroleum analysis, polymer testing, or nanofluid viscosity measurement.
IJERA (International journal of Engineering Research and Applications) is International online, ... peer reviewed journal. For more detail or submit your article, please visit www.ijera.com
The document discusses unsaturated water flow in pavements. It aims to understand how water moves through pavement structures, how long it remains, and what factors control moisture conditions. It compares saturated versus unsaturated flow, and notes unsaturated flow is slower. It describes using actual pavement geometries and material properties in a finite element model to calibrate predictions of water content from sensors to observed field data. The model is adjusted based on precipitation data and material densities to improve prediction accuracy at different sensor locations within the pavement structure.
The document describes the Volume of Fluid (VOF) model for simulating flows with interfaces between multiple immiscible fluids. The VOF model tracks the volume fraction of each fluid throughout the domain using a single set of momentum equations shared between the fluids. It is designed for fluids where the interface is of interest, such as large bubbles, dam breaks, or liquid-gas interfaces. The document provides examples of simulating a dam break using the VOF model and discusses the model's steady state and time dependent capabilities as well as auxiliary models that can be used with it.
This document presents experimental research on streamer propagation and breakdown in synthetic ester, natural ester, and mineral oil liquids with pressboard interfaces under lightning impulse voltages. Tests were conducted using a point-plane electrode system with pressboard placed parallel to the electric field. Results show that:
1) Streamers on ester/pressboard interfaces propagate further than on mineral oil/pressboard interfaces at the same voltage levels.
2) Introducing parallel pressboard does not influence streamer stopping length or weaken breakdown voltage up to gap distances of 75mm under both polarities.
3) Presence of parallel pressboard reduces acceleration voltage in mineral oil but has little influence on esters under positive polarity
1. Ultracentrifugation uses high centrifugal forces to separate particles in solution based on differences in size, shape, density, and other properties.
2. It was invented in the 1920s and allows for separations not possible with lower speed centrifuges.
3. There are two main types - analytical ultracentrifugation which analyzes samples during centrifugation, and preparative ultracentrifugation which isolates and purifies particles.
Floating power plants (FPPs) are mobile offshore power generation facilities that can be rapidly deployed to supply electricity to areas in need. One of the earliest FPPs was constructed in 1940 in the Philippines and is still operational today in Ecuador. Countries in Southeast Asia and South America have utilized FPPs to address severe power shortages. FPPs are designed to operate like ships on water, generating power while remaining stable without rotational movement as water levels change. Recent FPP developments include diesel, wind, and tidal energy powered models.
This document discusses different types of viscometers used to measure the viscosity of fluids. It describes the theory, operation, and applications of three common viscometers: the Redwood viscometer, Ubbelohde viscometer, and Hoppler viscometer. The Redwood viscometer measures viscosity based on the flow of liquid through an orifice. The Ubbelohde viscometer is a capillary tube viscometer that times liquid flow between marks. The Hoppler viscometer determines viscosity from the terminal velocity of a ball falling through a liquid in a tube. Each viscometer has advantages for certain applications like petroleum analysis, polymer testing, or nanofluid viscosity measurement.
This laboratory report summarizes an experiment analyzing the residence time distribution of a continuously stirred tank reactor (CSTR) using a tracer method. Sodium chloride was injected as an inert tracer and its concentration over time was measured in the reactor effluent. The data was used to calculate residence time distribution and cumulative distribution functions, which provide insight into how real reactors operate compared to ideal models. Mean residence time and a tanks-in-series model were also determined to diagnose any non-ideal reactor behaviors like dead volumes or bypassing.
This document discusses several types of viscometers used to measure viscosity, including rotational viscometers, cone and plate viscometers, and falling ball viscometers. Rotational viscometers measure viscosity by sensing the torque resistance of a spindle rotating in a fluid sample at constant speeds. Cone and plate viscometers measure the torque required to rotate a cone in highly viscous fluids and pastes at varying angular velocities. Falling ball viscometers time the fall of a ball between marks in a temperature-controlled fluid sample to calculate viscosity.
Rotational viscometers measure viscosity by measuring the resistance of a spindle rotating in a fluid sample. They can measure both Newtonian and non-Newtonian fluids. Vibrational viscometers continuously measure viscosity in pipes and tanks by creating shear waves in the fluid and measuring the lost energy. Falling piston viscometers measure the time it takes for a piston to fall through a fluid, and falling ball viscometers measure the time it takes a ball to fall a set distance in a fluid. Different types of viscometers are suited to different applications and fluid properties.
This document provides recommendations for measuring the dynamic modulus of elasticity of plain concrete specimens in a laboratory. It outlines the test method, which involves applying a variable frequency force to a prismatic concrete sample and measuring its resonant frequency. This frequency is then used in an equation to calculate the dynamic modulus of elasticity. The document specifies the required test apparatus, sample preparation procedures, measurement and calculation methods, and reporting requirements.
1) The document discusses an experimental study on vibration control of rotating beams using semi-fluids.
2) In the experiment, different grades of grease were embedded between aluminum plates to form a sandwich beam structure. This was tested on a setup with a stepper motor that could rotate the beam at varying RPM.
3) Vibration responses measured using an accelerometer were plotted using LabVIEW software. Results showed that beams with higher viscosity grease embedded had greater vibration attenuation capacity compared to ones with lower viscosity grease or no grease.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Effect of Nanocellulose as an Additive in CementIRJET Journal
This document discusses using nanocellulose as an additive in cement to improve its compressive strength. The author conducted experiments adding varying amounts of nanocellulose suspension to cement slurries. Testing showed that adding up to 5% nanocellulose increased the compressive strength of the cured cement cubes by 50% compared to neat cement cubes without nanocellulose. Rheological testing also showed that nanocellulose additions did not significantly change the thickening time of the cement slurries. The document concludes that nanocellulose is an effective and inexpensive additive for applications requiring high compressive strength cement.
Rheology is the study of deformation and flow of matter. It involves measuring the viscosity and viscoelastic properties of materials under different conditions like temperature, pressure and shear rates. Various types of instruments called rheometers are used to measure rheological properties including rotational viscometers, capillary rheometers and other moving body viscometers. The document discusses different types of viscometers and rheometers used for measuring rheological properties of polymers and other materials.
This document summarizes the results of experiments measuring the rheological properties of rayon and nylon fibers in water using a torque rheometer and Parr reactor. Both rayon and nylon exhibited negative plastic viscosity and high yield stress. Rayon showed high temperature dependence of plastic viscosity, while nylon's plastic viscosity was independent of temperature. Fiber length was found to not impact rayon's viscosity, yield stress, or plastic viscosity at 10wt% solid level. Results from the two rheometers deviated from each other.
This experiment aimed to determine the viscosity of a drilling mud composed of bentonite and water using a viscometer. A mud was prepared and mixed, then tested using a rotational viscometer to obtain readings at 600 RPM and 300 RPM. Equations were used to calculate the apparent viscosity, plastic viscosity, and yield point from the readings. The results found the apparent viscosity was 77.5 cP, plastic viscosity was 3 cP, and yield point was 149 lb/ft2. In conclusion, a rotational viscometer can be used to determine important rheological properties of drilling mud.
Viscosity is a measure of a liquid's resistance to flow. It is defined as the shear stress divided by the rate of shear strain. There are several methods to measure viscosity, including using capillary viscometers, rotating viscometers, and falling ball viscometers. Rotating viscometers rotate an object immersed in the liquid, such as a spindle or concentric cylinders, and measure the torque required at different rotational speeds to determine viscosity.
Viscosity is a measure of a liquid's resistance to flow. It is defined as the shear stress divided by the rate of shear strain. There are several methods to measure viscosity, including using capillary tubes, rotating viscometers, and falling ball viscometers. The measurement involves determining the time required for liquid to flow through a capillary or for a ball to fall between marks in a viscometer tube, from which the dynamic viscosity in mPa·s can be calculated. Viscosity measurements require controlling the temperature accurately, usually within 0.1°C.
MEMS sensors can be used to detect various stimuli through mechanical, optical, electrical, or chemical methods. Common MEMS sensor types include accelerometers, pressure sensors, and chemical sensors. Pressure sensors typically use a diaphragm that deforms in response to pressure changes, which can be measured through capacitive or piezoresistive techniques. Chemical sensors often utilize polymers that absorb target chemicals, causing a change such as mass that is detected via methods like measuring cantilever resonance frequency shifts. Fabrication involves depositing layers like polysilicon and sacrificial oxides, which are patterned using lithography and etched to form the sensor structure.
This document summarizes different types of viscometers used to measure viscosity. It discusses capillary viscometers like Ostwald's viscometer which measures flow through a capillary tube. Falling and rising body viscometers like the Hoeppler ball viscometer measure the terminal velocity of a ball. Rotational viscometers like the cup and bob viscometer apply shear between two surfaces, one stationary and one rotating. Other viscometers described include cone and plate, vibrational, bubble, and oscillating viscometers. The document provides formulas, working principles, advantages and disadvantages of various viscometer types used to characterize fluids.
This document discusses rheology and viscosity. It defines rheology as the science of flow of fluids and deformation of solids under stress. Viscosity is a measure of a fluid's resistance to flow and is important in formulation of products like creams, ointments, and suspensions. The document describes different types of fluid flow based on viscosity, such as Newtonian, plastic, and pseudoplastic flow. It also discusses instruments used to measure viscosity like capillary, falling sphere, cup and bob, and cone and plate viscometers. Thixotropy, where the viscosity of a fluid decreases under shear stress over time, is also covered.
AJK2011-03023 (Conference Paper DR) Modelling Multiphase Jet Flows for High V...David Ryan
This document summarizes CFD simulations of flow inside an industrial static mixer called a Sonolator. Single-phase steady-state simulations were performed for three mass flow rates through a fixed nozzle orifice. Streamline data was used to calculate residence times and turbulent energy dissipation rates, which can provide insight into droplet breakup for emulsification processes. Validation was done against experimental discharge coefficients and predicted droplet sizes may depend on inlet conditions for multiphase mixtures.
Turbine flow meters measure volumetric flow by detecting the rotation of a rotor within a housing as fluid passes through. They provide accurate, repeatable measurements with a fast response time. To ensure high accuracy, turbine meters must be calibrated using a positive displacement calibrator that can achieve errors of 0.05% or less. Viscosity affects turbine performance, so meters should be calibrated at the operating viscosity or equipped with technology to correct for viscosity and density variations caused by temperature changes. With proper calibration and correction methods, turbine meters can accurately measure varying flows.
1) The document discusses using a soap film experiment to visualize and understand the wake interactions between multiple piezoelectric cantilevers used for wind energy harvesting.
2) Two models were tested in the soap film tunnel - a single cantilever and two cantilevers placed 8 mm apart.
3) The soap film experiment setup includes a vertical tunnel with divergent, test, and convergent sections to produce a constant velocity soap film for visualizing vortex shedding and flows.
This experiment studied the effect of step change input on the concentration in a continuous stirred tank reactor (CSTR) system consisting of three reactors in series. Sodium chloride solution was introduced to the first reactor and deionized water was pumped through the system. Conductivity readings were taken from each reactor every 3 minutes. The results showed that the conductivity increased over time as the salt solution spread through the reactors. After 84 minutes, the conductivity values equalized across the three reactors, indicating the input had achieved steady state distribution. Issues with data recording affected the smoothness of the plotted results graph.
Freshworks Rethinks NoSQL for Rapid Scaling & Cost-EfficiencyScyllaDB
Freshworks creates AI-boosted business software that helps employees work more efficiently and effectively. Managing data across multiple RDBMS and NoSQL databases was already a challenge at their current scale. To prepare for 10X growth, they knew it was time to rethink their database strategy. Learn how they architected a solution that would simplify scaling while keeping costs under control.
Northern Engraving | Nameplate Manufacturing Process - 2024Northern Engraving
Manufacturing custom quality metal nameplates and badges involves several standard operations. Processes include sheet prep, lithography, screening, coating, punch press and inspection. All decoration is completed in the flat sheet with adhesive and tooling operations following. The possibilities for creating unique durable nameplates are endless. How will you create your brand identity? We can help!
This laboratory report summarizes an experiment analyzing the residence time distribution of a continuously stirred tank reactor (CSTR) using a tracer method. Sodium chloride was injected as an inert tracer and its concentration over time was measured in the reactor effluent. The data was used to calculate residence time distribution and cumulative distribution functions, which provide insight into how real reactors operate compared to ideal models. Mean residence time and a tanks-in-series model were also determined to diagnose any non-ideal reactor behaviors like dead volumes or bypassing.
This document discusses several types of viscometers used to measure viscosity, including rotational viscometers, cone and plate viscometers, and falling ball viscometers. Rotational viscometers measure viscosity by sensing the torque resistance of a spindle rotating in a fluid sample at constant speeds. Cone and plate viscometers measure the torque required to rotate a cone in highly viscous fluids and pastes at varying angular velocities. Falling ball viscometers time the fall of a ball between marks in a temperature-controlled fluid sample to calculate viscosity.
Rotational viscometers measure viscosity by measuring the resistance of a spindle rotating in a fluid sample. They can measure both Newtonian and non-Newtonian fluids. Vibrational viscometers continuously measure viscosity in pipes and tanks by creating shear waves in the fluid and measuring the lost energy. Falling piston viscometers measure the time it takes for a piston to fall through a fluid, and falling ball viscometers measure the time it takes a ball to fall a set distance in a fluid. Different types of viscometers are suited to different applications and fluid properties.
This document provides recommendations for measuring the dynamic modulus of elasticity of plain concrete specimens in a laboratory. It outlines the test method, which involves applying a variable frequency force to a prismatic concrete sample and measuring its resonant frequency. This frequency is then used in an equation to calculate the dynamic modulus of elasticity. The document specifies the required test apparatus, sample preparation procedures, measurement and calculation methods, and reporting requirements.
1) The document discusses an experimental study on vibration control of rotating beams using semi-fluids.
2) In the experiment, different grades of grease were embedded between aluminum plates to form a sandwich beam structure. This was tested on a setup with a stepper motor that could rotate the beam at varying RPM.
3) Vibration responses measured using an accelerometer were plotted using LabVIEW software. Results showed that beams with higher viscosity grease embedded had greater vibration attenuation capacity compared to ones with lower viscosity grease or no grease.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Effect of Nanocellulose as an Additive in CementIRJET Journal
This document discusses using nanocellulose as an additive in cement to improve its compressive strength. The author conducted experiments adding varying amounts of nanocellulose suspension to cement slurries. Testing showed that adding up to 5% nanocellulose increased the compressive strength of the cured cement cubes by 50% compared to neat cement cubes without nanocellulose. Rheological testing also showed that nanocellulose additions did not significantly change the thickening time of the cement slurries. The document concludes that nanocellulose is an effective and inexpensive additive for applications requiring high compressive strength cement.
Rheology is the study of deformation and flow of matter. It involves measuring the viscosity and viscoelastic properties of materials under different conditions like temperature, pressure and shear rates. Various types of instruments called rheometers are used to measure rheological properties including rotational viscometers, capillary rheometers and other moving body viscometers. The document discusses different types of viscometers and rheometers used for measuring rheological properties of polymers and other materials.
This document summarizes the results of experiments measuring the rheological properties of rayon and nylon fibers in water using a torque rheometer and Parr reactor. Both rayon and nylon exhibited negative plastic viscosity and high yield stress. Rayon showed high temperature dependence of plastic viscosity, while nylon's plastic viscosity was independent of temperature. Fiber length was found to not impact rayon's viscosity, yield stress, or plastic viscosity at 10wt% solid level. Results from the two rheometers deviated from each other.
This experiment aimed to determine the viscosity of a drilling mud composed of bentonite and water using a viscometer. A mud was prepared and mixed, then tested using a rotational viscometer to obtain readings at 600 RPM and 300 RPM. Equations were used to calculate the apparent viscosity, plastic viscosity, and yield point from the readings. The results found the apparent viscosity was 77.5 cP, plastic viscosity was 3 cP, and yield point was 149 lb/ft2. In conclusion, a rotational viscometer can be used to determine important rheological properties of drilling mud.
Viscosity is a measure of a liquid's resistance to flow. It is defined as the shear stress divided by the rate of shear strain. There are several methods to measure viscosity, including using capillary viscometers, rotating viscometers, and falling ball viscometers. Rotating viscometers rotate an object immersed in the liquid, such as a spindle or concentric cylinders, and measure the torque required at different rotational speeds to determine viscosity.
Viscosity is a measure of a liquid's resistance to flow. It is defined as the shear stress divided by the rate of shear strain. There are several methods to measure viscosity, including using capillary tubes, rotating viscometers, and falling ball viscometers. The measurement involves determining the time required for liquid to flow through a capillary or for a ball to fall between marks in a viscometer tube, from which the dynamic viscosity in mPa·s can be calculated. Viscosity measurements require controlling the temperature accurately, usually within 0.1°C.
MEMS sensors can be used to detect various stimuli through mechanical, optical, electrical, or chemical methods. Common MEMS sensor types include accelerometers, pressure sensors, and chemical sensors. Pressure sensors typically use a diaphragm that deforms in response to pressure changes, which can be measured through capacitive or piezoresistive techniques. Chemical sensors often utilize polymers that absorb target chemicals, causing a change such as mass that is detected via methods like measuring cantilever resonance frequency shifts. Fabrication involves depositing layers like polysilicon and sacrificial oxides, which are patterned using lithography and etched to form the sensor structure.
This document summarizes different types of viscometers used to measure viscosity. It discusses capillary viscometers like Ostwald's viscometer which measures flow through a capillary tube. Falling and rising body viscometers like the Hoeppler ball viscometer measure the terminal velocity of a ball. Rotational viscometers like the cup and bob viscometer apply shear between two surfaces, one stationary and one rotating. Other viscometers described include cone and plate, vibrational, bubble, and oscillating viscometers. The document provides formulas, working principles, advantages and disadvantages of various viscometer types used to characterize fluids.
This document discusses rheology and viscosity. It defines rheology as the science of flow of fluids and deformation of solids under stress. Viscosity is a measure of a fluid's resistance to flow and is important in formulation of products like creams, ointments, and suspensions. The document describes different types of fluid flow based on viscosity, such as Newtonian, plastic, and pseudoplastic flow. It also discusses instruments used to measure viscosity like capillary, falling sphere, cup and bob, and cone and plate viscometers. Thixotropy, where the viscosity of a fluid decreases under shear stress over time, is also covered.
AJK2011-03023 (Conference Paper DR) Modelling Multiphase Jet Flows for High V...David Ryan
This document summarizes CFD simulations of flow inside an industrial static mixer called a Sonolator. Single-phase steady-state simulations were performed for three mass flow rates through a fixed nozzle orifice. Streamline data was used to calculate residence times and turbulent energy dissipation rates, which can provide insight into droplet breakup for emulsification processes. Validation was done against experimental discharge coefficients and predicted droplet sizes may depend on inlet conditions for multiphase mixtures.
Turbine flow meters measure volumetric flow by detecting the rotation of a rotor within a housing as fluid passes through. They provide accurate, repeatable measurements with a fast response time. To ensure high accuracy, turbine meters must be calibrated using a positive displacement calibrator that can achieve errors of 0.05% or less. Viscosity affects turbine performance, so meters should be calibrated at the operating viscosity or equipped with technology to correct for viscosity and density variations caused by temperature changes. With proper calibration and correction methods, turbine meters can accurately measure varying flows.
1) The document discusses using a soap film experiment to visualize and understand the wake interactions between multiple piezoelectric cantilevers used for wind energy harvesting.
2) Two models were tested in the soap film tunnel - a single cantilever and two cantilevers placed 8 mm apart.
3) The soap film experiment setup includes a vertical tunnel with divergent, test, and convergent sections to produce a constant velocity soap film for visualizing vortex shedding and flows.
This experiment studied the effect of step change input on the concentration in a continuous stirred tank reactor (CSTR) system consisting of three reactors in series. Sodium chloride solution was introduced to the first reactor and deionized water was pumped through the system. Conductivity readings were taken from each reactor every 3 minutes. The results showed that the conductivity increased over time as the salt solution spread through the reactors. After 84 minutes, the conductivity values equalized across the three reactors, indicating the input had achieved steady state distribution. Issues with data recording affected the smoothness of the plotted results graph.
Freshworks Rethinks NoSQL for Rapid Scaling & Cost-EfficiencyScyllaDB
Freshworks creates AI-boosted business software that helps employees work more efficiently and effectively. Managing data across multiple RDBMS and NoSQL databases was already a challenge at their current scale. To prepare for 10X growth, they knew it was time to rethink their database strategy. Learn how they architected a solution that would simplify scaling while keeping costs under control.
Northern Engraving | Nameplate Manufacturing Process - 2024Northern Engraving
Manufacturing custom quality metal nameplates and badges involves several standard operations. Processes include sheet prep, lithography, screening, coating, punch press and inspection. All decoration is completed in the flat sheet with adhesive and tooling operations following. The possibilities for creating unique durable nameplates are endless. How will you create your brand identity? We can help!
Have you ever been confused by the myriad of choices offered by AWS for hosting a website or an API?
Lambda, Elastic Beanstalk, Lightsail, Amplify, S3 (and more!) can each host websites + APIs. But which one should we choose?
Which one is cheapest? Which one is fastest? Which one will scale to meet our needs?
Join me in this session as we dive into each AWS hosting service to determine which one is best for your scenario and explain why!
"Scaling RAG Applications to serve millions of users", Kevin GoedeckeFwdays
How we managed to grow and scale a RAG application from zero to thousands of users in 7 months. Lessons from technical challenges around managing high load for LLMs, RAGs and Vector databases.
"$10 thousand per minute of downtime: architecture, queues, streaming and fin...Fwdays
Direct losses from downtime in 1 minute = $5-$10 thousand dollars. Reputation is priceless.
As part of the talk, we will consider the architectural strategies necessary for the development of highly loaded fintech solutions. We will focus on using queues and streaming to efficiently work and manage large amounts of data in real-time and to minimize latency.
We will focus special attention on the architectural patterns used in the design of the fintech system, microservices and event-driven architecture, which ensure scalability, fault tolerance, and consistency of the entire system.
"Choosing proper type of scaling", Olena SyrotaFwdays
Imagine an IoT processing system that is already quite mature and production-ready and for which client coverage is growing and scaling and performance aspects are life and death questions. The system has Redis, MongoDB, and stream processing based on ksqldb. In this talk, firstly, we will analyze scaling approaches and then select the proper ones for our system.
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor IvaniukFwdays
At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...Alex Pruden
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
The Department of Veteran Affairs (VA) invited Taylor Paschal, Knowledge & Information Management Consultant at Enterprise Knowledge, to speak at a Knowledge Management Lunch and Learn hosted on June 12, 2024. All Office of Administration staff were invited to attend and received professional development credit for participating in the voluntary event.
The objectives of the Lunch and Learn presentation were to:
- Review what KM ‘is’ and ‘isn’t’
- Understand the value of KM and the benefits of engaging
- Define and reflect on your “what’s in it for me?”
- Share actionable ways you can participate in Knowledge - - Capture & Transfer
Monitoring and Managing Anomaly Detection on OpenShift.pdfTosin Akinosho
Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
1. Introduction to Anomaly Detection
- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
- Learn about edge computing and IoT, and how they enable real-time data processing and decision-making at the source.
3. What is ArgoCD?
- Discover ArgoCD, a declarative, GitOps continuous delivery tool for Kubernetes, and its role in deploying applications on edge devices.
4. Deployment Using ArgoCD for Edge Devices
- Step-by-step guide on deploying anomaly detection models on edge devices using ArgoCD.
5. Introduction to Apache Kafka and S3
- Explore Apache Kafka for real-time data streaming and Amazon S3 for scalable storage solutions.
6. Viewing Kafka Messages in the Data Lake
- Learn how to view and analyze Kafka messages stored in a data lake for better insights.
7. What is Prometheus?
- Get to know Prometheus, an open-source monitoring and alerting toolkit, and its application in monitoring edge devices.
8. Monitoring Application Metrics with Prometheus
- Detailed instructions on setting up Prometheus to monitor the performance and health of your anomaly detection system.
9. What is Camel K?
- Introduction to Camel K, a lightweight integration framework built on Apache Camel, designed for Kubernetes.
10. Configuring Camel K Integrations for Data Pipelines
- Learn how to configure Camel K for seamless data pipeline integrations in your anomaly detection workflow.
11. What is a Jupyter Notebook?
- Overview of Jupyter Notebooks, an open-source web application for creating and sharing documents with live code, equations, visualizations, and narrative text.
12. Jupyter Notebooks with Code Examples
- Hands-on examples and code snippets in Jupyter Notebooks to help you implement and test anomaly detection models.
inQuba Webinar Mastering Customer Journey Management with Dr Graham HillLizaNolte
HERE IS YOUR WEBINAR CONTENT! 'Mastering Customer Journey Management with Dr. Graham Hill'. We hope you find the webinar recording both insightful and enjoyable.
In this webinar, we explored essential aspects of Customer Journey Management and personalization. Here’s a summary of the key insights and topics discussed:
Key Takeaways:
Understanding the Customer Journey: Dr. Hill emphasized the importance of mapping and understanding the complete customer journey to identify touchpoints and opportunities for improvement.
Personalization Strategies: We discussed how to leverage data and insights to create personalized experiences that resonate with customers.
Technology Integration: Insights were shared on how inQuba’s advanced technology can streamline customer interactions and drive operational efficiency.
Northern Engraving | Modern Metal Trim, Nameplates and Appliance PanelsNorthern Engraving
What began over 115 years ago as a supplier of precision gauges to the automotive industry has evolved into being an industry leader in the manufacture of product branding, automotive cockpit trim and decorative appliance trim. Value-added services include in-house Design, Engineering, Program Management, Test Lab and Tool Shops.
Taking AI to the Next Level in Manufacturing.pdfssuserfac0301
Read Taking AI to the Next Level in Manufacturing to gain insights on AI adoption in the manufacturing industry, such as:
1. How quickly AI is being implemented in manufacturing.
2. Which barriers stand in the way of AI adoption.
3. How data quality and governance form the backbone of AI.
4. Organizational processes and structures that may inhibit effective AI adoption.
6. Ideas and approaches to help build your organization's AI strategy.
JavaLand 2024: Application Development Green Masterplan
35 2 0274(1)
1. Instrumentation Journal of Physics 35 No. 2 (1989) 274-281
Concentric Cylinder Viscometer Extremely
Low Shear Stress.
R. T. Rodriguez, Raul Montiel C. and A. Romo U.
Department of Physics, University Autonomy Metropolitan - Iztapalapa,
PO Box 55-534, 09340 Mexico, DF
(Received August 2, 1988; accepted January 13, 1989)
Summary.
This paper describes the design and construction of a viscometer of Zimm-
Crothers type, which allows very accurate viscosity measurements at various values
of shear stressesusing only an extremely small rotor.
Abstract
We describe the design and construction of a Zimm Crothers type viscosimeter which
permits us to get very accurate neasurements of viscosity at several values of the
extremely low shear stress, using only one rotor.
1. Introduction directly proportional to viscosity.
One of the oldest techniques and used It may happen, however, that the
in the characterization of materials in viscosity of the polymer solution is
solution is plyometrics viscometry. This dependent on the flow conditions of the
is based on the fact that the presence instrument used: in these cases it is
of large particles dissolved or said that the non-Newtonian
suspended in a liquid produced a viscosity. This type of behavior is found
radical change in the flow property mainly in solutions of highly asymmetric
of the system. molecules rigid or flexible molecules in
solutions of very high molecular
A very important advantage of this weight.
technique is that the amount is
determined experimentally, either The capillary viscometer has proven to
viscous or the torque flow time is be a versatile and inexpensive,
2. however, due to progress in the study
of biological macromolecules, has been
found that many of these molecules are
degraded under the action of even
small shear forces found in the FIGURE 1. The diagram shows the
viscometers capillaries. Furthermore, position of the rotor in the
some biological and synthetic stator.
molecules have non-Newtonian
behavior when subjected to shear 2. Design and construction
stresses experienced in regular sized
capillaries. The viscometer of Zimm-Crothers
type [1], is a concentric cylinder
viscometer, which is made entirely
In view of this, there is need for a of glass, this feature provides the
viscosity comparable to convenience facility to work with almost any
and availability of a capillary solvent.
viscometer, but operating at high shear The outer cylinder (called the stator)
rates of several orders of magnitude remains fixed, while the inner
lower than the capillary. cylinder (called the rotor) is rotating
(Fig.1).
The instrument described herein is
cheap, puts the solution in contact with At the bottom of the stator was
only glass, runs at different shear placed a tube for introducing the
stresses and has been used in cutting sample is from the bottom of the
forces from 0.003 to 0.0008 dynes/cm2, viscometer. This device also
which are several orders of magnitude facilitate filling, very accurately
less than commonly, used capillary adjusts the height of the rotor on the
viscometers. stator core to be reproducible in the
viscosity measurements, in general,
the relative viscosity measurements
have an accuracy of no more than
0.2% .
All the viscometer is introduced into
a heating jacket (Fig. 2) which
allows the device to operate at
different temperatures. As
temperature control was used brand
Haake recirculating bath with
platinum resistance control, which
3. controls with accuracy of
±0.05°C.
The viscometer should be mounted
rigidly to preserve the geometry of
the system. For this is supported
with a nylon ring which is mounted
on a bracket that allows five
movements: first, the position of the
viscosity on the external magnetic
field is carried out through three
platforms that move in the x - y -
z; second, the orientation thereof
with respect to the magnet takes
place by three screws placed in the
nylon ring which allow movement
zenithal and azimuthal (θ, φ) (Fig. FIGURE 2. The figure shows a
2). It is important to note that the cross section of the concentric
alignment of the viscometer with cylinder viscometer and the
respect to the external magnetic description of its components.
field is vital to prevent movement of
precession of the rotor.
where P is the period of revolution
for the solution to the solvent P0 and
By determining the viscosity is Pm to the external magnetic field. In
directly proportional to the time of our case having us that Pm = 0.1
revolution of the rotor as shown in second, thus a negligible amount is
the following expression: about P which is on the order of 300
seconds and P0 is the order of 90
− seconds.
=
−
To determine this period of
revolution is made a small mark on
the aluminum which is observed
using a cathetometer, which is fixed
to the worktable. Was used
additionally an electronic counting,
which operates in the following
manner: a disk mounted with
regularly spaced perforations on the
4. synchronous motor, and through an supported solely by flotation, can be
optocoupler mounted on the base of used
the viscometer (Fig. 2), the
frequency was measured angle of only a single rotor with liquids
rotation of the disc which resulted to whose densities vary in a range of
be of 16.4-Hz, the signal obtained less than five percent. Fig 5 shows
by rotating the disc is sent to an a schematic diagram of the
electronic counter, the reading of experimental equipment and Figs. 6
this is proportional to the viscosity of and 7 show graphs of the calibration
the solution in the viscometer. In Fig curves of viscosity for toluene and
3 shows a photograph of the carbon tetrachloride, respectively. In
instrument, and in Figs. 4a and 4b Tables I, II, III summarizes some of
show schematic diagrams of the physical characteristics of the
electronics involved in this device. instrument.
It is very important to keep a careful There have been several attempts
cleaning of the rotor in operation, it by other authors [2, 3], in order to
should not be touched with fingers automate this instrument by adding
while the viscometer is placed in, as optical devices, which allow more
this will cause problems in flotation precise measurements.
and centered.
Figure 3. The photograph shows the
viscometer mounted on its base.
It should be noted that the density of
the liquid is very important in the use of
this viscometer, because the rotor is
5. 3. Experimental results. tetrachloride (CCl4 PBIC on.
Molecules of poly-(butylisocyanate)
As mentioned above, some of the for not too high molecular weights
systems suitable for use in this type (less than 105) have the form rigid
viscometers are those in which the rod.
molecules are asymmetrical, or
polymer molecules which have the Due to the asymmetrical shape of
form of rigid rods, this is because the molecules, they have a phase
the analysis of viscometer these transition, which was predicted by
solutions must be made extremely Flory [4] of an isotropic state in
low cutting speed. which all the molecules have
random orientations to a nematic
Because of this, we used this type state in which there is a
viscometer on solutions of poly- direction privileged along which the
(butylisocyanate) in carbon polymer chains tend to align.
This phase transition modifies the viscosity of the solution, and is intended to detect
this by viscometric measurements. However, the viscosity must
Perforated disc
output
FIGURE 4a. The photo detector output signal is
a square type of 0-5V.
FIGURE 4b. Electronics concentric cylinder
viscometer.
6. Have very low shear for the velocity field does not induce the phase transition.
Two solutions were prepared in CCl4 PBIC. Was analyzed each of these solutions
at different temperatures in the range of 18°C to 42°C.
In Figure 8a shows a graph of experimental results obtained for the system in CCI4
PBIC. Clearly shows that there is a discontinuity in the viscosity when the
temperature changes. This graph was made at a concentration of 8.6 x 10-4g / g. In
Figure 8b shows the detail of the transition for the same system at a concentration
of 9x10-4g/g.
FIGURE 5. The figure shows the
experimental setup used.
FIGURE 6. Calibration curve of toluene.
FIGURE 7. Calibration curve for carbon tetrachloride.
FIGURE 8A. Log graph of viscosity vs. reciprocal
temperature for the solution-CCI4 PBIC the
concentration of 8.6x10-4g/g.
7. FIGURE 8. Log graph of viscosity
vs. reciprocal temperature for the
solution-CCI4 PBlC the
concentration 9.0x10-4g/g.
TABLE 1. Physical data of the stator and TABLE 2. Details of the aluminum
rotor comprising the concentric cylinder core of the rotor.
viscometer.
TABLE 3. Comparative data between the concentric cylinder viscometer and a
capillary viscometer typical.
4. Conclusions
The concentric cylinder viscometer presented here, despite being a little more difficult
than using a capillary viscometer, practically does not disturb the system under study,
the shear so small that they can be obtained with this instrument at all, in some cases ,
the only means which can measure the viscosity of solutions or suspensions of large
particles.
8. 5. References:
1. H. H. Zimm & C.M.Crothers, Proc. Nat. Acad. Sci. 48 (1962) 905.
2. W. H. J. Stork & H. Vroome, J. Phys. E: Sci lnst 5 (1972) 314.
3. H. J. Seherr, H. C. Vautine & L.P. Witnaver, J. Phys E: Sci Inst 3
(1970) 322.
4. P. J. Flory, Proc. Roy. Soc. London A234 (1956) 73.