A comprehensive study of the numerical properties of high-order residual-based dissipation terms for unsteady compressible flows leads to the design of well-behaved, low dissipative schemes of third-, fifth- and seventh-order accuracy. The dissipation and dispersion properties of the schemes are then evaluated theoreticaly, through Fourier space analysis, and numerically, through selected test cases including the inviscid Taylor-Green Vortex flow.
Quality Assurance in LOINC® using Description LogicTomasz Adamusiak
When multiple LOINC parts map to the same SNOMED CT concept, it indicates that those LOINC parts are semantically equivalent according to SNOMED CT. Even though they are represented separately in LOINC, SNOMED CT provides the integration by grouping them under a single concept. This enriches the representation and allows for more complete reasoning and quality assurance across terminologies.
Using Dynochem to determine a suitable sampling endpoint in a DoE. David Place.Scale-up Systems
The document discusses using Dynochem software to determine suitable sampling endpoints for design of experiments (DOEs) investigating chemical reactions. It provides a case study of a Finkelstein alkylation reaction where an impurity forms. Dynochem is used to fit rate constants and activation energies to the reaction mechanism. This allows simulating different experimental conditions to identify suitable reaction times that control impurity formation before committing resources to a DOE. The kinetic model can then refine the factor ranges investigated in the DOE to efficiently establish critical process parameters.
This paper will focus on Cooperative learning in science education.
Curcumin extract is subjected to 1H NMR, 13C NMR, and 2D -HSQC FT-NMR analysis for structure
the 2D NMR specra may be obtained that indicate coupling between hydrogens and carbons to which they are attached. In this case it is called heteronuclear correlation spectroscopy (HECTOR, HSQC, or C-H HECTOR).
Application Note: Gross Alpha Measurements in Aqueous Samples Using Extractio...PerkinElmer, Inc.
A new approach to the measurement of gross alphas in liquid samples, which combines Eichrom's extraction technology with PerkinElmer's liquid scintillation analysis technology, is presented. Difficulties with sample preparation and detection efficiency have always been problematic with the traditional method of gas flow proportional counting (GPC). The use of Eichrom's extraction resins and alpha liquid scintillation counting (LCS) has resolved the sample preparation problems, associated with drying the sample on a planchet. With its superior detection efficiency over GPC, this combination provides a better counting platform. Thus, many of the inherent limitations associated with the traditional GPC method are overcome by using this new approach and results demonstrate faster sample preparation, lower detection limits and shorter counting times.
From Live Sequence Chart Specifications to Distributed ComponentsDirk Fahland
This document proposes a method to synthesize a decentralized system from a specification of Live Sequence Charts (LSCs). It introduces distributed LSCs (dLSCs) which use partial orders and local states instead of global states. A two-step process first synthesizes a Petri net structure from LSC main charts, then adds guards to tokens based on LSC precharts. This extracts autonomous components while preserving behaviors. A prototype tool demonstrates the approach on an emergency management example. Future work includes code generation and increasing dLSC expressiveness.
The document examines the effect of mass loading and deposition technique on the polymorphic phase of RDX and C4 explosive materials using Raman spectroscopy. Direct deposits of RDX and C4 solutions at various mass loadings produced α-RDX and β-RDX at higher masses, but only β-RDX at lower masses. Dry transfer of deposits consistently produced α-RDX, indicating this technique is needed to create a standard with solely the α-RDX phase for fingerprint detection. The results show that deposition method impacts the polymorph observed and must be considered to produce accurate trace explosive standards.
Microsoft Exchange Server 2007 High Availability And Disaster Recovery Deep Diversnarayanan
This document discusses various Exchange Server disaster recovery and high availability solutions such as continuous replication (CCR), standby continuous replication (SCR), local continuous replication (LCR), and single copy cluster (SCC). It provides details on how each solution works, when to use each one, advantages and disadvantages of CCR versus SCC, and basics of how continuous replication functions in Exchange. It also covers topics like transport dumpster redelivery, lost log resilience, and circular logging.
La autora admira a su abuela por haber estado presente en los momentos más importantes de su vida desde pequeña, dándole un buen ejemplo y apoyo incondicional. A pesar de los momentos difíciles, su abuela siempre tiene una sonrisa y un abrazo para ella, y ha sido fundamental en su formación como persona.
Quality Assurance in LOINC® using Description LogicTomasz Adamusiak
When multiple LOINC parts map to the same SNOMED CT concept, it indicates that those LOINC parts are semantically equivalent according to SNOMED CT. Even though they are represented separately in LOINC, SNOMED CT provides the integration by grouping them under a single concept. This enriches the representation and allows for more complete reasoning and quality assurance across terminologies.
Using Dynochem to determine a suitable sampling endpoint in a DoE. David Place.Scale-up Systems
The document discusses using Dynochem software to determine suitable sampling endpoints for design of experiments (DOEs) investigating chemical reactions. It provides a case study of a Finkelstein alkylation reaction where an impurity forms. Dynochem is used to fit rate constants and activation energies to the reaction mechanism. This allows simulating different experimental conditions to identify suitable reaction times that control impurity formation before committing resources to a DOE. The kinetic model can then refine the factor ranges investigated in the DOE to efficiently establish critical process parameters.
This paper will focus on Cooperative learning in science education.
Curcumin extract is subjected to 1H NMR, 13C NMR, and 2D -HSQC FT-NMR analysis for structure
the 2D NMR specra may be obtained that indicate coupling between hydrogens and carbons to which they are attached. In this case it is called heteronuclear correlation spectroscopy (HECTOR, HSQC, or C-H HECTOR).
Application Note: Gross Alpha Measurements in Aqueous Samples Using Extractio...PerkinElmer, Inc.
A new approach to the measurement of gross alphas in liquid samples, which combines Eichrom's extraction technology with PerkinElmer's liquid scintillation analysis technology, is presented. Difficulties with sample preparation and detection efficiency have always been problematic with the traditional method of gas flow proportional counting (GPC). The use of Eichrom's extraction resins and alpha liquid scintillation counting (LCS) has resolved the sample preparation problems, associated with drying the sample on a planchet. With its superior detection efficiency over GPC, this combination provides a better counting platform. Thus, many of the inherent limitations associated with the traditional GPC method are overcome by using this new approach and results demonstrate faster sample preparation, lower detection limits and shorter counting times.
From Live Sequence Chart Specifications to Distributed ComponentsDirk Fahland
This document proposes a method to synthesize a decentralized system from a specification of Live Sequence Charts (LSCs). It introduces distributed LSCs (dLSCs) which use partial orders and local states instead of global states. A two-step process first synthesizes a Petri net structure from LSC main charts, then adds guards to tokens based on LSC precharts. This extracts autonomous components while preserving behaviors. A prototype tool demonstrates the approach on an emergency management example. Future work includes code generation and increasing dLSC expressiveness.
The document examines the effect of mass loading and deposition technique on the polymorphic phase of RDX and C4 explosive materials using Raman spectroscopy. Direct deposits of RDX and C4 solutions at various mass loadings produced α-RDX and β-RDX at higher masses, but only β-RDX at lower masses. Dry transfer of deposits consistently produced α-RDX, indicating this technique is needed to create a standard with solely the α-RDX phase for fingerprint detection. The results show that deposition method impacts the polymorph observed and must be considered to produce accurate trace explosive standards.
Microsoft Exchange Server 2007 High Availability And Disaster Recovery Deep Diversnarayanan
This document discusses various Exchange Server disaster recovery and high availability solutions such as continuous replication (CCR), standby continuous replication (SCR), local continuous replication (LCR), and single copy cluster (SCC). It provides details on how each solution works, when to use each one, advantages and disadvantages of CCR versus SCC, and basics of how continuous replication functions in Exchange. It also covers topics like transport dumpster redelivery, lost log resilience, and circular logging.
La autora admira a su abuela por haber estado presente en los momentos más importantes de su vida desde pequeña, dándole un buen ejemplo y apoyo incondicional. A pesar de los momentos difíciles, su abuela siempre tiene una sonrisa y un abrazo para ella, y ha sido fundamental en su formación como persona.
1064nm 532nm portable nd yag laser machine for toenail fungus tattoo removalStarry Liu
This document provides information on the Nd yag 1064nm laser toenail fungus treatment system. It details the technical specifications of the laser including its wavelength, pulse energy, frequency, dimensions and voltage requirements. It also describes the features such as its cooling system, portable design, safety, and ability to remove pigmentation without side effects. The document summarizes the training, after sales service including a one year warranty and lifetime maintenance that is provided. It also includes technical parameters, accessories details, before and after pictures and information about the reliable manufacturing company.
Build, Test, Deploy, Run, Scale! Sua App na Nuvem com OpenShift, o PaaS da Re...Fabiano Franz
Houve um tempo em que publicar e gerenciar aplicações na internet era um processo caro, complexo e demorado. Em tempos de Cloud Computing essa possibilidade pode estar mais próxima do que você imagina. Nesta palestra abordaremos uma introdução e showcase do projeto OpenShift, a solução de Plataforma como Serviço open source da Red Hat. Veremos como é possível desenvolver, testar, publicar, rodar e escalar aplicações na nuvem desenvolvidas em Java, Ruby, Node.js, Python, PHP, Perl e muitas outras tecnologias de forma simples, gratuita e open source. Seja para sua próxima idéia de app revolucionária, seu projeto open source ou mesmo como infraestrutura corporativa, venha descobrir como o OpenShift pode ajudá-lo em suas necessidades de plataforma de aplicativos.
Get requirements from the Contracting Authority regarding allowable costs, prohibited items, and legal/policy restrictions. Identify stakeholders like students, faculty, cleaning staff, security, and administration. Observe current locker users to understand how they are used and determine if lockers are the best solution or if an alternative could better meet user needs. Create a diverse design team to discuss and test feasible alternatives that meet stakeholder requirements, establish costs, and select the optimal technology solution with a schedule and budget.
This deck explains how gift certificates can be sold and redeemed via the web store as well as Manager Panel for Hitachi Solutions Ecommerce. A mobile friendly feature, it used QR codes to make redemption easier.
Este documento presenta las instrucciones para crear un programa en Scratch que controla el movimiento de un objeto mediante las teclas de flecha. El programa genera números aleatorios y muestra mensajes cuando el objeto toca otro.
This document discusses the future of shipbuilding and the driving forces necessitating changes, including:
1. Hard times in the shipbuilding industry and need to remove obstacles and reevaluate challenges.
2. New customer requirements around the environment, automation, and new markets.
3. Evolving industry trends like distributed work, replacing retiring workers, and increased automation.
4. Broad innovation enabled by technology advances and feedback relationships allowing more mature solutions.
The future of shipbuilding is predicted to involve infinite computing power, generative designs, virtual reality, digital twins, cyber-physical systems, automation, IoT, and 3D printing transforming engineering design, detail design, and manufacturing over the next 15 years.
El documento ofrece consejos para navegar de forma segura en Internet. Recomienda evitar enlaces sospechosos, no acceder a sitios web de dudosa reputación, mantener actualizados el sistema operativo y las aplicaciones, descargar aplicaciones solo de sitios web oficiales, usar tecnologías de seguridad como antivirus y firewall, y no ingresar información personal en formularios dudosos. En resumen, promueve navegar con cuidado en Internet para prevenir amenazas a la seguridad.
The document provides guidance on writing effective essays. It discusses:
1. Developing a clear structure is essential, with a solid introduction, logical flow of ideas between paragraphs, and a concluding paragraph that ties everything together.
2. The structure should organize the material into related themes or arguments rather than just defining terms or stating pros and cons in a formulaic way.
3. When getting started, brainstorming and grouping ideas into a coherent order can help develop an outline to guide writing.
Archer South Africa - benefits of mms overview 2012Johann Venter
The document discusses the benefits of Archer Mobile's digital statement solution (DSS) for sending statements via MMS, SMS, email and mobile websites. The key benefits highlighted include being more cost effective and environmentally friendly than printing, providing instant and personalized communication, and allowing for complete measurability of statement campaigns. Archer Mobile offers end-to-end services including data scrubbing, campaign management, reporting and hosting mobile websites to view statements for customers. Sample case studies show DSS increasing collections and responsiveness from customers in the banking and retail sectors.
The Administrative Commission announced three new interpretative decisions on the aggregation of periods, benefits in kind and major appliances, and reimbursement mechanisms for unemployment benefits that took effect in 2011. They also adopted a practical guide on applicable legislation and began discussions on new provisions regarding child-raising periods and cooperation in recovery efforts. Cooperation was also reinforced on issues of fraud and the international dimension of social security.
1064nm 532nm portable nd yag laser machine for toenail fungus tattoo removalStarry Liu
This document provides information on the Nd yag 1064nm laser toenail fungus treatment system. It details the technical specifications of the laser including its wavelength, pulse energy, frequency, dimensions and voltage requirements. It also describes the features such as its cooling system, portable design, safety, and ability to remove pigmentation without side effects. The document summarizes the training, after sales service including a one year warranty and lifetime maintenance that is provided. It also includes technical parameters, accessories details, before and after pictures and information about the reliable manufacturing company.
Build, Test, Deploy, Run, Scale! Sua App na Nuvem com OpenShift, o PaaS da Re...Fabiano Franz
Houve um tempo em que publicar e gerenciar aplicações na internet era um processo caro, complexo e demorado. Em tempos de Cloud Computing essa possibilidade pode estar mais próxima do que você imagina. Nesta palestra abordaremos uma introdução e showcase do projeto OpenShift, a solução de Plataforma como Serviço open source da Red Hat. Veremos como é possível desenvolver, testar, publicar, rodar e escalar aplicações na nuvem desenvolvidas em Java, Ruby, Node.js, Python, PHP, Perl e muitas outras tecnologias de forma simples, gratuita e open source. Seja para sua próxima idéia de app revolucionária, seu projeto open source ou mesmo como infraestrutura corporativa, venha descobrir como o OpenShift pode ajudá-lo em suas necessidades de plataforma de aplicativos.
Get requirements from the Contracting Authority regarding allowable costs, prohibited items, and legal/policy restrictions. Identify stakeholders like students, faculty, cleaning staff, security, and administration. Observe current locker users to understand how they are used and determine if lockers are the best solution or if an alternative could better meet user needs. Create a diverse design team to discuss and test feasible alternatives that meet stakeholder requirements, establish costs, and select the optimal technology solution with a schedule and budget.
This deck explains how gift certificates can be sold and redeemed via the web store as well as Manager Panel for Hitachi Solutions Ecommerce. A mobile friendly feature, it used QR codes to make redemption easier.
Este documento presenta las instrucciones para crear un programa en Scratch que controla el movimiento de un objeto mediante las teclas de flecha. El programa genera números aleatorios y muestra mensajes cuando el objeto toca otro.
This document discusses the future of shipbuilding and the driving forces necessitating changes, including:
1. Hard times in the shipbuilding industry and need to remove obstacles and reevaluate challenges.
2. New customer requirements around the environment, automation, and new markets.
3. Evolving industry trends like distributed work, replacing retiring workers, and increased automation.
4. Broad innovation enabled by technology advances and feedback relationships allowing more mature solutions.
The future of shipbuilding is predicted to involve infinite computing power, generative designs, virtual reality, digital twins, cyber-physical systems, automation, IoT, and 3D printing transforming engineering design, detail design, and manufacturing over the next 15 years.
El documento ofrece consejos para navegar de forma segura en Internet. Recomienda evitar enlaces sospechosos, no acceder a sitios web de dudosa reputación, mantener actualizados el sistema operativo y las aplicaciones, descargar aplicaciones solo de sitios web oficiales, usar tecnologías de seguridad como antivirus y firewall, y no ingresar información personal en formularios dudosos. En resumen, promueve navegar con cuidado en Internet para prevenir amenazas a la seguridad.
The document provides guidance on writing effective essays. It discusses:
1. Developing a clear structure is essential, with a solid introduction, logical flow of ideas between paragraphs, and a concluding paragraph that ties everything together.
2. The structure should organize the material into related themes or arguments rather than just defining terms or stating pros and cons in a formulaic way.
3. When getting started, brainstorming and grouping ideas into a coherent order can help develop an outline to guide writing.
Archer South Africa - benefits of mms overview 2012Johann Venter
The document discusses the benefits of Archer Mobile's digital statement solution (DSS) for sending statements via MMS, SMS, email and mobile websites. The key benefits highlighted include being more cost effective and environmentally friendly than printing, providing instant and personalized communication, and allowing for complete measurability of statement campaigns. Archer Mobile offers end-to-end services including data scrubbing, campaign management, reporting and hosting mobile websites to view statements for customers. Sample case studies show DSS increasing collections and responsiveness from customers in the banking and retail sectors.
The Administrative Commission announced three new interpretative decisions on the aggregation of periods, benefits in kind and major appliances, and reimbursement mechanisms for unemployment benefits that took effect in 2011. They also adopted a practical guide on applicable legislation and began discussions on new provisions regarding child-raising periods and cooperation in recovery efforts. Cooperation was also reinforced on issues of fraud and the international dimension of social security.
The document describes research on modeling synthetic genetic AND gates using computational modeling. It discusses two approaches to modeling - assisting with analysis and design, or describing existing system behavior. It then details the development of a model for a synthetic genetic AND gate using elementary chemical reactions and stochastic simulation. The model was able to capture experimental results but required refinements to account for promoter leakiness. Overall, modeling helped understand the genetic components and could be applied to larger designs.
Study and development of a distributed hydrologic model, WetSpa, applied to t...Alireza Safari
This document summarizes Alireza Safari's PhD thesis on developing and applying the distributed hydrologic model WetSpa to basins in Oklahoma, USA as part of the DMIP2 modeling framework. The thesis involved applying WetSpa to both parent basins and interior subbasins using radar rainfall data, calibrating the model with PEST and an ARIMA error model, and analyzing model predictions, with a focus on improving high and low flow simulations. Key conclusions were that WetSpa performed well but underestimated extremes, and a modified WetSpa structure improved prediction, especially for subbasins.
Validation of a Low-Cost Transitional Turbulence Model for Low-Reynolds-Numb...counse
This is a slide show I presented at the 2011 AIAA CFD Conference in Honolulu, Hawaii. The research herein was published and presented in 2 journal articles, 6 conferences, and an award-nominated thesis. The presentation focuses on the use of the SST gamma-Re_theta turbulence model and its applicability to the low-Reynolds-number regime.
A QSAR is a mathematical relationship between a biological activity of a molecular system and its geometric and chemical characteristics.
QSAR attempts to find consistent relationship between biological activity and molecular properties, so that these “rules” can be used to evaluate the activity of new compounds.
This document discusses best practices for conducting and reporting on computational fluid dynamics (CFD) analyses to achieve credible and confident results. It emphasizes the importance of verification and validation to demonstrate acceptable levels of error and uncertainty. It provides guidance on quantifying various sources of error in CFD simulations and outlines recommended steps for grid convergence studies, reporting results, and validating simulations against experimental data.
The document summarizes one-dimensional sediment modelling conducted for the Chuzachen and Devsari hydroelectric power projects in India to evaluate the feasibility of using project reservoirs as pseudo-desanders. The modelling was performed using the DOSSBAS tool within the SHARC software. Input parameters were optimized and deposition and sluicing models were run to simulate sedimentation over time. The results provided longitudinal bed profiles and estimates of sediment volumes, trap efficiencies, and times required to flush sediments from the reservoirs.
Technical calculations for the biological treatment plantAlex Tagbo
This document discusses the design and operation of a decentralized wastewater treatment plant in Chennai, India that uses biological treatment processes. The plant serves 55,000 people and uses principles of carbon elimination, nitrification, and denitrification. It follows guidelines from ATV 131, the German technical standard for wastewater treatment plant design. The document outlines the treatment process, design considerations, and compares German and Indian wastewater treatment standards. It also analyzes how treatment plant size and volume requirements vary with influent temperature and population size.
NASA has developed cryogenic fluid management technologies to support future exploration missions. Recent accomplishments include validating computational models against past cryogenic storage experiments, demonstrating long term liquid hydrogen storage with minimal boil-off, and testing a radio frequency mass gauge that accurately measured propellant levels in liquid hydrogen. Future work will focus on technologies for storing and transferring cryogens in low gravity environments to support propulsion and surface systems, with the goals of reducing launch mass and simplifying vehicle operations for missions to the Moon and Mars.
This document summarizes a research paper on modeling DC-DC converters with high frequencies using state space analysis. The paper presents an approach to modeling that avoids assuming constant current ripples, allowing for a better representation at high frequencies. State space averaging is commonly used to model PWM DC-DC converters but has limitations. The presented approach generalizes state space averaging to account for harmonics' effects, transforming time-varying models into time-invariant linear models. Equations for the state space model of a buck converter are provided both when operating and when turned off, and the average state model is derived. The goal is to improve performance for load and input variations through implicit feedforward compensation.
Signal Integrity Analysis of LC lopass Filterjose0055
This document analyzes signal integrity of a 2nd order low pass filter circuit. It develops the transfer function of a simple 2nd order LC filter circuit and compares the frequency responses of 3 different filter designs. It then extends the analysis to consider multiple identical filter sections separated by an ideal transmission line, and how the delay of the transmission line can tune the data-dependent jitter to local maximums and minimums. Breaking the circuit at a point of minimum jitter shows the input impedance into the transmission line is nearly conjugately matched to the terminated filter output at the data rate fundamental frequency.
Optimal Capacitor Placement in a Radial Distribution System using Shuffled Fr...IDES Editor
This paper presents a new and efficient approach
for capacitor placement in radial distribution systems that
determine the optimal locations and size of capacitor with an
objective of improving the voltage profile and reduction of
power loss. The solution methodology has two parts: in part
one the loss sensitivity factors are used to select the candidate
locations for the capacitor placement and in part two a new
algorithm that employs Shuffle Frog Leaping Algorithm
(SFLA) and Particle Swarm Optimization are used to estimate
the optimal size of capacitors at the optimal buses determined
in part one. The main advantage of the proposed method is
that it does not require any external control parameters. The
other advantage is that it handles the objective function and
the constraints separately, avoiding the trouble to determine
the barrier factors. The proposed method is applied to 45-bus
radial distribution systems.
Similar to Analysis of High-Order Residual-Based Dissipation for Unsteady Compressible Flows (15)
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...DanBrown980551
This LF Energy webinar took place June 20, 2024. It featured:
-Alex Thornton, LF Energy
-Hallie Cramer, Google
-Daniel Roesler, UtilityAPI
-Henry Richardson, WattTime
In response to the urgency and scale required to effectively address climate change, open source solutions offer significant potential for driving innovation and progress. Currently, there is a growing demand for standardization and interoperability in energy data and modeling. Open source standards and specifications within the energy sector can also alleviate challenges associated with data fragmentation, transparency, and accessibility. At the same time, it is crucial to consider privacy and security concerns throughout the development of open source platforms.
This webinar will delve into the motivations behind establishing LF Energy’s Carbon Data Specification Consortium. It will provide an overview of the draft specifications and the ongoing progress made by the respective working groups.
Three primary specifications will be discussed:
-Discovery and client registration, emphasizing transparent processes and secure and private access
-Customer data, centering around customer tariffs, bills, energy usage, and full consumption disclosure
-Power systems data, focusing on grid data, inclusive of transmission and distribution networks, generation, intergrid power flows, and market settlement data
Session 1 - Intro to Robotic Process Automation.pdfUiPathCommunity
👉 Check out our full 'Africa Series - Automation Student Developers (EN)' page to register for the full program:
https://bit.ly/Automation_Student_Kickstart
In this session, we shall introduce you to the world of automation, the UiPath Platform, and guide you on how to install and setup UiPath Studio on your Windows PC.
📕 Detailed agenda:
What is RPA? Benefits of RPA?
RPA Applications
The UiPath End-to-End Automation Platform
UiPath Studio CE Installation and Setup
💻 Extra training through UiPath Academy:
Introduction to Automation
UiPath Business Automation Platform
Explore automation development with UiPath Studio
👉 Register here for our upcoming Session 2 on June 20: Introduction to UiPath Studio Fundamentals: https://community.uipath.com/events/details/uipath-lagos-presents-session-2-introduction-to-uipath-studio-fundamentals/
High performance Serverless Java on AWS- GoTo Amsterdam 2024Vadym Kazulkin
Java is for many years one of the most popular programming languages, but it used to have hard times in the Serverless community. Java is known for its high cold start times and high memory footprint, comparing to other programming languages like Node.js and Python. In this talk I'll look at the general best practices and techniques we can use to decrease memory consumption, cold start times for Java Serverless development on AWS including GraalVM (Native Image) and AWS own offering SnapStart based on Firecracker microVM snapshot and restore and CRaC (Coordinated Restore at Checkpoint) runtime hooks. I'll also provide a lot of benchmarking on Lambda functions trying out various deployment package sizes, Lambda memory settings, Java compilation options and HTTP (a)synchronous clients and measure their impact on cold and warm start times.
Essentials of Automations: Exploring Attributes & Automation ParametersSafe Software
Building automations in FME Flow can save time, money, and help businesses scale by eliminating data silos and providing data to stakeholders in real-time. One essential component to orchestrating complex automations is the use of attributes & automation parameters (both formerly known as “keys”). In fact, it’s unlikely you’ll ever build an Automation without using these components, but what exactly are they?
Attributes & automation parameters enable the automation author to pass data values from one automation component to the next. During this webinar, our FME Flow Specialists will cover leveraging the three types of these output attributes & parameters in FME Flow: Event, Custom, and Automation. As a bonus, they’ll also be making use of the Split-Merge Block functionality.
You’ll leave this webinar with a better understanding of how to maximize the potential of automations by making use of attributes & automation parameters, with the ultimate goal of setting your enterprise integration workflows up on autopilot.
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!
Fueling AI with Great Data with Airbyte WebinarZilliz
This talk will focus on how to collect data from a variety of sources, leveraging this data for RAG and other GenAI use cases, and finally charting your course to productionalization.
Conversational agents, or chatbots, are increasingly used to access all sorts of services using natural language. While open-domain chatbots - like ChatGPT - can converse on any topic, task-oriented chatbots - the focus of this paper - are designed for specific tasks, like booking a flight, obtaining customer support, or setting an appointment. Like any other software, task-oriented chatbots need to be properly tested, usually by defining and executing test scenarios (i.e., sequences of user-chatbot interactions). However, there is currently a lack of methods to quantify the completeness and strength of such test scenarios, which can lead to low-quality tests, and hence to buggy chatbots.
To fill this gap, we propose adapting mutation testing (MuT) for task-oriented chatbots. To this end, we introduce a set of mutation operators that emulate faults in chatbot designs, an architecture that enables MuT on chatbots built using heterogeneous technologies, and a practical realisation as an Eclipse plugin. Moreover, we evaluate the applicability, effectiveness and efficiency of our approach on open-source chatbots, with promising results.
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.
"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.
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
Your One-Stop Shop for Python Success: Top 10 US Python Development Providersakankshawande
Simplify your search for a reliable Python development partner! This list presents the top 10 trusted US providers offering comprehensive Python development services, ensuring your project's success from conception to completion.
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.
Discover top-tier mobile app development services, offering innovative solutions for iOS and Android. Enhance your business with custom, user-friendly mobile applications.
Crafting Excellence: A Comprehensive Guide to iOS Mobile App Development Serv...
Analysis of High-Order Residual-Based Dissipation for Unsteady Compressible Flows
1. DynFluid
Fluid Dynamics Laboratory
Analysis of high-order residual-based
dissipation for unsteady
compressible flows
Karim GRIMICH
Joint Work with:
Paola CINNELLA
Alain LERAT
ICCFD-2804
1
2. Introduction
• Two usual ways for constructing high-accurate schemes on a structured grid:
Extend the grid stencil
use compact approximations (directional compact, DG, RBC …)
• Owing to their narrow stencil, compact approximations:
greatly reduce the error coefficient with respect to a non-compact
approximation of the same accuracy order
improve treatment of irregular meshes
• Here we use centered compact approximation:
With no filter,
No artificial viscosity or limiter
• A Residual-Based Compact (RBC) scheme [Lerat, Corre, JCP 2001] can be
expressed only in terms of approximations of the exact residual (sum of all the
terms in the governing eqns), even for the numerical dissipation.
• Use of residual based approach enables genuinely multi dimensional dissipation.
DynFluid
Fluid Dynamics Laboratory 2
3. Aims and motivations
• A queer feature is that the residual-based dissipation behaves as the discrete
residual, i.e. it is consistent with a null function
When residual tends to zero high-order dissipation terms are left.
• Need for
identifying the actual dissipation operator through suitable expansions
finding the necessary and sufficient conditions ensuring that this
operator is really dissipative for all flow conditions.
studying the spectral properties of RBC schemes for a multidimensional
problem to get information on the evolution of Fourier modes supported
on a given grid.
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Fluid Dynamics Laboratory 3
4. Summary
I. High-order RBC schemes
II. The χ-criterion for RBC dissipation
III. Spectral properties of RBC schemes
IV. Numerical experiments
DynFluid
Fluid Dynamics Laboratory 4
5. Summary
I. High-order RBC schemes
II. The χ-criterion for RBC dissipation
III. Spectral properties of RBC schemes
IV. Numerical experiments
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Fluid Dynamics Laboratory 5
6. High-order RBC schemes
Initial value problem
on a uniform mesh
~
~ ~
~
Mean and difference operators:
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Fluid Dynamics Laboratory 6
7. High-order RBC schemes
Exact residual:
Residual-Based Compact schemes:
Third-order of accuracy using 3x3 points: RBC3
Fifth-order of accuracy using 5x5 points: RBC5
Seventh-order accuracy using 5x5 points: RBC7
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Fluid Dynamics Laboratory 7
8. High-order RBC schemes
Spatial approximation of the main residual:
Pade approximation of first order derivatives
where
Applying to the all left hand side gives
Which truncation error is
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Fluid Dynamics Laboratory 8
9. High-order RBC schemes
Residual based dissipation operator:
Mid-point residuals using the same technique as for the main residual
Where and are designed once for all [Lerat, Corre, JCP 2001]
with no tuning parameter
depending only on A=df/dw, B=dg/dw, and
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Fluid Dynamics Laboratory 9
10. High-order RBC schemes
A peculiar feature of unsteady RBC schemes:
A mass matrix appears due to difference operators applied to wt.
Operators applied to Operators applied to spatial
temporal derivatives derivatives
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Fluid Dynamics Laboratory 10
11. High-order RBC schemes
The residual-based operator is consistent with the first order and dissipative
operator [Lerat, Corre, JCP 2001]:
For an exact solution the residual is null
is consistent with some higher
order term
To which high order term is it consistent with?
Is this high-order term dissipative or not?
How this high-order dissipation behaves?
DynFluid
Fluid Dynamics Laboratory 11
12. Summary
I. High-order RBC schemes
II. The χ-criterion for RBC dissipation
III. Spectral properties of RBC schemes
IV. Numerical experiments
DynFluid
Fluid Dynamics Laboratory 12
13. The χ-criterion for dissipation
Role of the x-discretization in r1 and the y-discretization in r2:
We define
With
Doing Taylor expansion of r1x around the point (j+1/2,k)
Similar result for
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Fluid Dynamics Laboratory 13
14. The χ-criterion for dissipation
Fully discretized RBC dissipation:
The full dissipation of a RBCq scheme can be expressed as:
with:
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Fluid Dynamics Laboratory 14
15. The χ-criterion for dissipation
The χ-criterion for dissipation:
In the linear case:
With
Since all derivatives in being even, its Fourier symbol is real.
Definition: The operator dq is said to be dissipative if
DynFluid
Fluid Dynamics Laboratory 15
16. The χ-criterion for dissipation
The χ-criterion for dissipation [Lerat, Grimich, Cinnella, submitted to JCP 2012]:
Theorem: The operator dq is dissipative for any order q=2p-1, any pair (A,B)
and any functions Φ1 and Φ2 such that
if and only if
Criterion easily satisfied through a proper choice of Pade coefficients
RBC3 and RBC7 presented in [Corre, Falissard, Lerat, C&F 2007]
do not satisfy the χ-criterion (weak instability for unsteady flows)
RBC5 presented in [Corre, Falissard, Lerat, C&F 2007] satisfies
the χ-criterion
Analogous results proved in 3D
DynFluid
Fluid Dynamics Laboratory 16
17. Summary
I. High-order RBC schemes
II. The χ-criterion for RBC dissipation
III. Spectral properties of RBC schemes
IV. Numerical experiments
DynFluid
Fluid Dynamics Laboratory 17
18. Spectral properties of RBC
RBC schemes spatial discretization expresses as
and can be rewritten as
Where is the operator applied to wt and the operator applied to w.
In a more compact way:
with
along with initial condition these ordinary differential equations define a Cauchy
problem that is studied in the following.
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Fluid Dynamics Laboratory 18
19. Spectral properties of RBC
We study the linear problem
Its Fourier transform is
(1)
Where is the velocity vector and is a 2D wave
vector.
We introduce
which is the reduced wave number aligned aligned with advection direction
where and are the CFL numbers
and is the reduced wave number vector
Thus (1) rewrites:
DynFluid
Fluid Dynamics Laboratory 19
20. Spectral properties of RBC
Taking the Fourier transform of the spatial discretization of RBC schemes
(2)
Introducing the modified reduced wave number along the advection direction
(2) re-writes
We define the error with respect to the exact wave number
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Fluid Dynamics Laboratory 20
21. Spectral properties of RBC
Cauchy stability of RBC schemes
Dispersion properties of RBC schemes
Dissipation properties of RBC schemes
If RBC schemes were infinitely accurate we would have
DynFluid
Fluid Dynamics Laboratory 21
22. Spectral properties of RBC
Cauchy stability of RBC schemes
unstable
unstable
stable
stable
RBC7 with χ≠0
RBC7 with χ=0
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Fluid Dynamics Laboratory 22
23. Spectral properties of RBC
Advection along a mesh direction
Dispersion and dissipation properties of RBC schemes (example of RBC7)
1D cut 1D cut
Dispersion Dissipation
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Fluid Dynamics Laboratory 23
24. Spectral properties of RBC
Advection along a mesh direction
1D cut
Dispersion Dissipation
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Fluid Dynamics Laboratory 24
25. Spectral properties of RBC
Advection along the mesh diagonal
Dispersion and dissipation properties of RBC schemes (example of RBC7)
Dispersion Dissipation
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Fluid Dynamics Laboratory 25
26. Spectral properties of RBC
Resolvability
: cutoff reduced wavelength for an
error lower than 10-3
: minimum number of points per
wavelength for an error lower than 10-3
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Fluid Dynamics Laboratory 26
27. Summary
I. High-order RBC schemes
II. The χ-criterion for RBC dissipation
III. Spectral properties of RBC schemes
IV. Numerical experiments
DynFluid
Fluid Dynamics Laboratory 27
28. Numerical experiments
The discretization has to be completed by selecting a time
approximation method
Here, we choose the 2nd-order accurate, A-stable Gear scheme
Stability region includes the complex stable half-plane
• Coupled with a dissipative scheme, this results in an unconditionally
stable discretization
Associated nonlinear system solved via a dual-time stepping technique
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Fluid Dynamics Laboratory 28
29. Advection of a sine wave
Validation of the χ-criterion for dissipation:
χ≠0
χ≠0
25x25 mesh λ
χ=0
χ=0
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Fluid Dynamics Laboratory 29
30. Advection of a sine wave
Resolvability of RBC schemes:
6 points per wavelength 8 points per wavelength 16 points per wavelength
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Fluid Dynamics Laboratory 30
31. Inviscid Taylor-Green vortex
Representative model to within the inertial range
Periodic boundary conditions +
t=0 t=3 t=5
RBC5 scheme
1283 mesh
Q-criterion colored by kinetic energy M=0.3 (Shu et al, J.Sci.Comput. 2005)
DynFluid
Fluid Dynamics Laboratory 31
34. Conclusion
• RBC schemes unsteady high-order dissipation has been identified
the χ-criterion for dissipation has been demonstrated ensuring that this
operator is really dissipative for all flow conditions.
the spectral properties of RBC schemes for a multidimensional problem
gave information on the evolution of Fourier modes supported on a given
grid: stability, dissipation, dispersion.
• Numerical experiments confirmed
the validity of the χ-criterion.
the low dissipative and dispersive behavior of high-order RBC
schemes
the high resolvability of high-order RBC schemes
• Perspectives
LES, DES simulations
design a suitable high-order time integration technique
DynFluid
Fluid Dynamics Laboratory 34
35. Thank you for your attention
Any question?
DynFluid
Fluid Dynamics Laboratory 35
37. Converging cylindrical shock
Converging cylindrical shock [Chisnell, JFM 1957] analytical estimation of the
pressure behind a moving
cylindrical shock
No filter
No Artificial Viscosity
No Tuning parameter
Shock strength becomes infinite when it reaches the axis
DynFluid
Fluid Dynamics Laboratory 37