This document describes a Meshless Local Petrov-Galerkin (MLPG) Mixed Collocation Method for solving Cauchy inverse heat transfer problems. The method independently interpolates temperature and heat flux fields using the same meshless basis functions. Balance and compatibility equations are enforced through collocation at nodes. Numerical examples demonstrate the accuracy, convergence, and stability of the method for inverse heat transfer problems where both temperature and heat flux are prescribed on part of the boundary.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
Numerical modeling of the welding defect influence on fatigue life of the wel...inventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
MHD Nanofluid Flow Analysis in a Semi-Porous Channel by a Combined Series Sol...A Behzadmehr
In this paper, Least Square Method (LSM) and Differential Transformation Method (DTM) are used to solve the problem of laminar nanofluid flow in a semi-porous channel in the presence of transverse magnetic field. Due to existence some shortcomings in each method, a novel and efficient method named LS-DTM is introduced which omitted those defects and has an excellent agreement with numerical solution. In the present study, the effective thermal conductivity and viscosity of nanofluid are calculated by Maxwell–Garnetts (MG) and Brinkman models, respectively. The influence of the three dimensionless numbers: the nanofluid volume friction, Hartmann number and Reynolds number on non-dimensional velocity profile are considered. The results show that velocity boundary layer thickness decrease with increase of Reynolds number and nanoparticle volume friction and it increases as Hartmann number increases.
International journal of engineering and mathematical modelling vol2 no1_2015_2IJEMM
This paper is devoted to the homogenization of the Maxwell equations with periodically oscillating coefficients in the bianisotropic media which represents the most general linear media. In the first time, the limiting homogeneous constitutive law is rigorously justified in the frequency domain and is found from the solution of a local problem on the unit cell. The homogenization process is based on the two-scale convergence conception. In the second time, the implementation of the homogeneous
constitutive law by using the finite element method and the introduction of the boundary conditions in the discrete problem are introduced. Finally, the numerical results associated of the perforated chiral media are presented.
Alternative and Explicit Derivation of the Lattice Boltzmann Equation for the...ijceronline
A lattice Boltzmann equation for fully incompressible flows is derived through the utilization of appropriate ansatzes. The result is a singular equilibrium distribution function which clarifies the algorithm for general implementation, and ensures correct steady and unsteady behavior. Through the Chapman-Enskog expansion, the exact incompressible Navier-Stokes equations are recovered. With 2D and 3D canonical numerical simulations, the application, accuracy, and workable boundary conditions are shown. Several unique benefits over the standard equation and alternative forms presented in literature are found, including faster convergence rate and greater stability.
International Journal of Computational Engineering Research (IJCER) is dedicated to protecting personal information and will make every reasonable effort to handle collected information appropriately. All information collected, as well as related requests, will be handled as carefully and efficiently as possible in accordance with IJCER standards for integrity and objectivity.
Numerical modeling of the welding defect influence on fatigue life of the wel...inventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
MHD Nanofluid Flow Analysis in a Semi-Porous Channel by a Combined Series Sol...A Behzadmehr
In this paper, Least Square Method (LSM) and Differential Transformation Method (DTM) are used to solve the problem of laminar nanofluid flow in a semi-porous channel in the presence of transverse magnetic field. Due to existence some shortcomings in each method, a novel and efficient method named LS-DTM is introduced which omitted those defects and has an excellent agreement with numerical solution. In the present study, the effective thermal conductivity and viscosity of nanofluid are calculated by Maxwell–Garnetts (MG) and Brinkman models, respectively. The influence of the three dimensionless numbers: the nanofluid volume friction, Hartmann number and Reynolds number on non-dimensional velocity profile are considered. The results show that velocity boundary layer thickness decrease with increase of Reynolds number and nanoparticle volume friction and it increases as Hartmann number increases.
International journal of engineering and mathematical modelling vol2 no1_2015_2IJEMM
This paper is devoted to the homogenization of the Maxwell equations with periodically oscillating coefficients in the bianisotropic media which represents the most general linear media. In the first time, the limiting homogeneous constitutive law is rigorously justified in the frequency domain and is found from the solution of a local problem on the unit cell. The homogenization process is based on the two-scale convergence conception. In the second time, the implementation of the homogeneous
constitutive law by using the finite element method and the introduction of the boundary conditions in the discrete problem are introduced. Finally, the numerical results associated of the perforated chiral media are presented.
Alternative and Explicit Derivation of the Lattice Boltzmann Equation for the...ijceronline
A lattice Boltzmann equation for fully incompressible flows is derived through the utilization of appropriate ansatzes. The result is a singular equilibrium distribution function which clarifies the algorithm for general implementation, and ensures correct steady and unsteady behavior. Through the Chapman-Enskog expansion, the exact incompressible Navier-Stokes equations are recovered. With 2D and 3D canonical numerical simulations, the application, accuracy, and workable boundary conditions are shown. Several unique benefits over the standard equation and alternative forms presented in literature are found, including faster convergence rate and greater stability.
A general approach is presented to describing nonlinear classical Maxwell electrodynamics with conformal symmetry. We introduce generalized nonlinear constitutive equations, expressed in terms of constitutive tensors dependent on conformal-invariant functionals of the field strengths. This allows a characterization of Lagrangian and non-Lagrangian theories. We obtain a general formula for possible Lagrangian densities in nonlinear conformal-invariant electrodynamics. This generalizes the standard Lagrangian of classical linear electrodynamics so as to preserve the conformal symmetry.
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.
A class of boundary value methods for the complex delay differential equationijscmcj
In this paper, a class of boundary value methods (BVMs) for delay differential equations (DDEs) is considered. The delay dependent stable regions of the extended trapezoidal rules of second kind (ETR2s), which are a class of BVMs, are displayed for the test equation of DDEs. Furthermore, it is showed ETR2s cannot preserve the delay-dependent stability of the complex coefficient test equation considered. Some numerical experiments are given to confirm the theoretical results.
AMS 2000 Mathematics Subject Classification: 65L20, 65M12
Effect of Bond Layer on Tri-Layered Assembly Subjected To Differential Unifor...IJERA Editor
In the present analytical and numerical study, the thermal mismatching stress induced under differential
temperature conditions of tri-layered assembly with bond is investigated. The thermal mismatching stresses are
one of the reasons for structural failures between two or more connected devices. Therefore it is very essential to
understand variation of these stresses and estimation in the interfaces play an important role in design and
reliability studies of microelectronic assemblies. In this paper, a physical model is proposed for the interfacial
shearing and peeling stresses occurring at the interfaces of tri-layered dissimilar materials with the effect of
bonding subjected to differential uniform temperature in the layer. It observed from both analytical and
numerical study that the shearing stress reduced in the range of 60% to 70% at interface (1-2) and 35% to 40%
at (2-3) interface. Peeling stress are continuously reduced in the range of 10% - 20% at (1-2) interface and 13%
- 35% at (2-3) interface due to the influence of bond layer. Thus, it indicates that, the bond layer consideration
may influence significantly on interfacial stress. It is found that the both interfacial shearing stresses and peeling
stresses decreased considerably at the interface with the increase of bond layer thickness.
Measuring Plastic Properties from Sharp Nanoindentation: A Finite-Element Stu...CrimsonPublishersRDMS
Measuring Plastic Properties from Sharp Nanoindentation: A Finite-Element Study on the Uniqueness of Inverse Solutions by Fabian Pöhl* in Crimson Publishers: Peer Reviewed Material Science Journals
-type and -type four dimensional plane wave solutions of Einstein's field eq...inventy
In the present paper, we have studied - type and -type plane wave solutions of Einstein's field equations in general theory of relativity in the case where the zero mass scalar field coupled with gravitational field and zero mass scalar field coupled with gravitational & electromagnetic field and established the existence of these two types of plane wave solutions in . Furthermore we have considered the case of massive scalar field and shown that the non-existence of these two types of plane wave solutions in GR theory.
EVALUATING STRUCTURAL, OPTICAL & ELECTRICAL CHARACTERIZATION OF ZINC CHALCOGE...Editor IJCATR
To evaluate the structural, optical & electrical properties of the zinc chalcogenides (ZnO, ZnS, ZnSe & ZnTe), the Full
Potential Linearized – Augumented Plane Wave plus Local Orbits (FP – LAPW+lo) method. For the purpose of exchange-correlation
energy (Exc) determination in Kohn–Sham calculation, the standard local density approximation (LDA) formalism has been utilized.
Murnaghan’s equation of state (EOS) has been used for volume optimization by minimizing the total energy with respect to the unit
cell volume. With the result of electronic density of states (DOS), the structural, optical and electrical properties of Zinc chalcogenides
have been calculated. The second derivative of energy, as a function of lattice strain has been successfully used to estimate the elastic
constants of these binary compounds. The results are in good agreement with other theoretical calculations as well as available
experimental data.
Integral transform methods for inverse problem of heat conduction with known ...IJLT EMAS
Three dimensional inverse transient thermoelastic problem of a semi-infinite hollow cylinder is considered within the context of the theory of generalized thermoelasticity. The lower surface, upper surface and inner surface of the semi-infinite hollow cylinder occupying the space D={(x,y,z)E R<sup>3</sup>: a≤(x<sup>2</sup>+y<sup>2</sup>)<sup>1/2</sup> ≤b, 0≤z≤∞} are known boundary conditions. Finite Marchi-Zgrablich transform and Fourier sine transform techniques are used to determine the unknown temperature gradient, temperature distribution, displacement and thermal stresses on outer curved surface of a cylinder. The distribution of the considered physical variables are obtained and represented graphically.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Galerkin’s indirect variational method in elastic stability analysis of all e...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Implementation Of Geometrical Nonlinearity in FEASTSMTiosrjce
Analysis of the structures used in aerospace applications is done using finite element
method. These structures may face unexpected loads because of variable environmental situations.
These loads could lead to large deformation and inelastic manner. The aim of this research is to
formulate the finite elements considering the effect of large deformation and strain. Here total
Lagrangian method is used to consider the effect of large deformation. After deriving required
relations, implementation of formulated equation is done in FEASTSMT(Finite Element Analysis of
Structures - Substructured and Multi-Threading). .Newton-Raphson method was utilized to solve
nonlinear finite element equations. The validation is carried out with the results obtained from the
Marc Software.
In July 2011, Dr. Younger became the executive director for the Catholic Research Resources Alliance (CRRA) after serving as the first chair of the Board of Directors. Prior to that, she led the Libraries at the University of Notre Dame where she and the expert library staff successfully carried out many initiatives that enhanced services and collections locally, nationally and internationally. She continues her affiliation with Notre Dame as the Edward H. Arnold Director of Hesburgh Libraries Emerita. Prior to that she served in administrative positions at The Ohio State University and the University of Wisconsin-Madison, where she also received her education and degrees in librarianship.
Dr. Younger continues as a leader in state, national, and international library organizations, having served on the boards of the Center for Research Libraries (CRL), the Association of Research Libraries (ARL), the Academic Libraries of Indiana (ALI) and the OCLC, a global library cooperative. She has published numerous articles on topics including cataloging and metadata, the challenges of cooperation and transforming libraries for the global information society and is invited frequently to speak at conferences. Most recently, for the second year, she was a co-presenter on best practices in digital archiving at the Catholic Media Conference, the annual conference of the Catholic Press Association of the United States and Canada.
A general approach is presented to describing nonlinear classical Maxwell electrodynamics with conformal symmetry. We introduce generalized nonlinear constitutive equations, expressed in terms of constitutive tensors dependent on conformal-invariant functionals of the field strengths. This allows a characterization of Lagrangian and non-Lagrangian theories. We obtain a general formula for possible Lagrangian densities in nonlinear conformal-invariant electrodynamics. This generalizes the standard Lagrangian of classical linear electrodynamics so as to preserve the conformal symmetry.
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.
A class of boundary value methods for the complex delay differential equationijscmcj
In this paper, a class of boundary value methods (BVMs) for delay differential equations (DDEs) is considered. The delay dependent stable regions of the extended trapezoidal rules of second kind (ETR2s), which are a class of BVMs, are displayed for the test equation of DDEs. Furthermore, it is showed ETR2s cannot preserve the delay-dependent stability of the complex coefficient test equation considered. Some numerical experiments are given to confirm the theoretical results.
AMS 2000 Mathematics Subject Classification: 65L20, 65M12
Effect of Bond Layer on Tri-Layered Assembly Subjected To Differential Unifor...IJERA Editor
In the present analytical and numerical study, the thermal mismatching stress induced under differential
temperature conditions of tri-layered assembly with bond is investigated. The thermal mismatching stresses are
one of the reasons for structural failures between two or more connected devices. Therefore it is very essential to
understand variation of these stresses and estimation in the interfaces play an important role in design and
reliability studies of microelectronic assemblies. In this paper, a physical model is proposed for the interfacial
shearing and peeling stresses occurring at the interfaces of tri-layered dissimilar materials with the effect of
bonding subjected to differential uniform temperature in the layer. It observed from both analytical and
numerical study that the shearing stress reduced in the range of 60% to 70% at interface (1-2) and 35% to 40%
at (2-3) interface. Peeling stress are continuously reduced in the range of 10% - 20% at (1-2) interface and 13%
- 35% at (2-3) interface due to the influence of bond layer. Thus, it indicates that, the bond layer consideration
may influence significantly on interfacial stress. It is found that the both interfacial shearing stresses and peeling
stresses decreased considerably at the interface with the increase of bond layer thickness.
Measuring Plastic Properties from Sharp Nanoindentation: A Finite-Element Stu...CrimsonPublishersRDMS
Measuring Plastic Properties from Sharp Nanoindentation: A Finite-Element Study on the Uniqueness of Inverse Solutions by Fabian Pöhl* in Crimson Publishers: Peer Reviewed Material Science Journals
-type and -type four dimensional plane wave solutions of Einstein's field eq...inventy
In the present paper, we have studied - type and -type plane wave solutions of Einstein's field equations in general theory of relativity in the case where the zero mass scalar field coupled with gravitational field and zero mass scalar field coupled with gravitational & electromagnetic field and established the existence of these two types of plane wave solutions in . Furthermore we have considered the case of massive scalar field and shown that the non-existence of these two types of plane wave solutions in GR theory.
EVALUATING STRUCTURAL, OPTICAL & ELECTRICAL CHARACTERIZATION OF ZINC CHALCOGE...Editor IJCATR
To evaluate the structural, optical & electrical properties of the zinc chalcogenides (ZnO, ZnS, ZnSe & ZnTe), the Full
Potential Linearized – Augumented Plane Wave plus Local Orbits (FP – LAPW+lo) method. For the purpose of exchange-correlation
energy (Exc) determination in Kohn–Sham calculation, the standard local density approximation (LDA) formalism has been utilized.
Murnaghan’s equation of state (EOS) has been used for volume optimization by minimizing the total energy with respect to the unit
cell volume. With the result of electronic density of states (DOS), the structural, optical and electrical properties of Zinc chalcogenides
have been calculated. The second derivative of energy, as a function of lattice strain has been successfully used to estimate the elastic
constants of these binary compounds. The results are in good agreement with other theoretical calculations as well as available
experimental data.
Integral transform methods for inverse problem of heat conduction with known ...IJLT EMAS
Three dimensional inverse transient thermoelastic problem of a semi-infinite hollow cylinder is considered within the context of the theory of generalized thermoelasticity. The lower surface, upper surface and inner surface of the semi-infinite hollow cylinder occupying the space D={(x,y,z)E R<sup>3</sup>: a≤(x<sup>2</sup>+y<sup>2</sup>)<sup>1/2</sup> ≤b, 0≤z≤∞} are known boundary conditions. Finite Marchi-Zgrablich transform and Fourier sine transform techniques are used to determine the unknown temperature gradient, temperature distribution, displacement and thermal stresses on outer curved surface of a cylinder. The distribution of the considered physical variables are obtained and represented graphically.
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology.
Galerkin’s indirect variational method in elastic stability analysis of all e...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Implementation Of Geometrical Nonlinearity in FEASTSMTiosrjce
Analysis of the structures used in aerospace applications is done using finite element
method. These structures may face unexpected loads because of variable environmental situations.
These loads could lead to large deformation and inelastic manner. The aim of this research is to
formulate the finite elements considering the effect of large deformation and strain. Here total
Lagrangian method is used to consider the effect of large deformation. After deriving required
relations, implementation of formulated equation is done in FEASTSMT(Finite Element Analysis of
Structures - Substructured and Multi-Threading). .Newton-Raphson method was utilized to solve
nonlinear finite element equations. The validation is carried out with the results obtained from the
Marc Software.
In July 2011, Dr. Younger became the executive director for the Catholic Research Resources Alliance (CRRA) after serving as the first chair of the Board of Directors. Prior to that, she led the Libraries at the University of Notre Dame where she and the expert library staff successfully carried out many initiatives that enhanced services and collections locally, nationally and internationally. She continues her affiliation with Notre Dame as the Edward H. Arnold Director of Hesburgh Libraries Emerita. Prior to that she served in administrative positions at The Ohio State University and the University of Wisconsin-Madison, where she also received her education and degrees in librarianship.
Dr. Younger continues as a leader in state, national, and international library organizations, having served on the boards of the Center for Research Libraries (CRL), the Association of Research Libraries (ARL), the Academic Libraries of Indiana (ALI) and the OCLC, a global library cooperative. She has published numerous articles on topics including cataloging and metadata, the challenges of cooperation and transforming libraries for the global information society and is invited frequently to speak at conferences. Most recently, for the second year, she was a co-presenter on best practices in digital archiving at the Catholic Media Conference, the annual conference of the Catholic Press Association of the United States and Canada.
Relativistic Mean Field Study of SM Isotopes with FTBCS Approach ijrap
A theoretical study of the thermal pairing correlation as a function of temperature is performed for eveneven
148-154Sm isotopes using Finite Temperature Bardeen-Cooper-Schrieffer (FTBCS) approach within the
Relativistic Mean Field (RMF) model. Numerical results obtained at T=0 are found to be consistent with
the available experimental values. Further, results show the thermal dependency of various nuclear
parameters like gap parameter, pairing energy, binding energy, deformation and density. At T≠0.0 MeV,
the destruction of Cooper pairs and the pairing phase transition as well as shape transition is observed in
148-154Sm nuclei at critical temperature Tc≠0.
Adomian Decomposition Method for Solving the Nonlinear Heat EquationIJERA Editor
This paper studies the application of the Adomian Decomposition Method to find the exact and approximate solutions of the heat equation with power nonlinearity. First, the relevant literature is studied in understanding the importance and extent of applicability of the method in the applied science. The literature review has been incorporated in the introduction of the paper. The rest of the paper is divided in three further sections. The first part Adomian Decomposition Method provides a step-by-step guide of applying the method on any heat equation with nonlinearity. The second section is labeled as Applications. It considers two examples from the previous works of Pumak (2005) and Hetmaniok et al. (2010) to find the exact and approximate solutions of the equations respectively.
This is the plenary talk given by Prof Shyue Ping Ong at the 57th Sanibel Symposium held on St Simon's Island in Georgia, USA.
Abstract: Powered by methodological breakthroughs and computing advances, electronic structure methods have today become an indispensable toolkit in the materials designer’s arsenal. In this talk, I will discuss two emerging trends that holds the promise to continue to push the envelope in computational design of materials. The first trend is the development of robust software and data frameworks for the automatic generation, storage and analysis of materials data sets. The second is the advent of reliable central materials data repositories, such as the Materials Project, which provides the research community with efficient access to large quantities of property information that can be mined for trends or new materials. I will show how we have leveraged on these new tools to accelerate discovery and design in energy and structural materials as well as our efforts in contributing back to the community through further tool or data development. I will also provide my perspective on future challenges in high-throughput computational materials design.
RELATIVISTIC MEAN FIELD STUDY OF SM ISOTOPES WITH FTBCS APPROACHijrap
A theoretical study of the thermal pairing correlation as a function of temperature is performed for eveneven
148-154Sm isotopes using Finite Temperature Bardeen-Cooper-Schrieffer (FTBCS) approach within the
Relativistic Mean Field (RMF) model. Numerical results obtained at T=0 are found to be consistent with
the available experimental values. Further, results show the thermal dependency of various nuclear
parameters like gap parameter, pairing energy, binding energy, deformation and density. At T≠0.0 MeV,
the destruction of Cooper pairs and the pairing phase transition as well as shape transition is observed in
148-154Sm nuclei at critical temperature Tc≠0.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
Generative AI Deep Dive: Advancing from Proof of Concept to ProductionAggregage
Join Maher Hanafi, VP of Engineering at Betterworks, in this new session where he'll share a practical framework to transform Gen AI prototypes into impactful products! He'll delve into the complexities of data collection and management, model selection and optimization, and ensuring security, scalability, and responsible use.
Enchancing adoption of Open Source Libraries. A case study on Albumentations.AIVladimir Iglovikov, Ph.D.
Presented by Vladimir Iglovikov:
- https://www.linkedin.com/in/iglovikov/
- https://x.com/viglovikov
- https://www.instagram.com/ternaus/
This presentation delves into the journey of Albumentations.ai, a highly successful open-source library for data augmentation.
Created out of a necessity for superior performance in Kaggle competitions, Albumentations has grown to become a widely used tool among data scientists and machine learning practitioners.
This case study covers various aspects, including:
People: The contributors and community that have supported Albumentations.
Metrics: The success indicators such as downloads, daily active users, GitHub stars, and financial contributions.
Challenges: The hurdles in monetizing open-source projects and measuring user engagement.
Development Practices: Best practices for creating, maintaining, and scaling open-source libraries, including code hygiene, CI/CD, and fast iteration.
Community Building: Strategies for making adoption easy, iterating quickly, and fostering a vibrant, engaged community.
Marketing: Both online and offline marketing tactics, focusing on real, impactful interactions and collaborations.
Mental Health: Maintaining balance and not feeling pressured by user demands.
Key insights include the importance of automation, making the adoption process seamless, and leveraging offline interactions for marketing. The presentation also emphasizes the need for continuous small improvements and building a friendly, inclusive community that contributes to the project's growth.
Vladimir Iglovikov brings his extensive experience as a Kaggle Grandmaster, ex-Staff ML Engineer at Lyft, sharing valuable lessons and practical advice for anyone looking to enhance the adoption of their open-source projects.
Explore more about Albumentations and join the community at:
GitHub: https://github.com/albumentations-team/albumentations
Website: https://albumentations.ai/
LinkedIn: https://www.linkedin.com/company/100504475
Twitter: https://x.com/albumentations
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Maruthi Prithivirajan, Head of ASEAN & IN Solution Architecture, Neo4j
Get an inside look at the latest Neo4j innovations that enable relationship-driven intelligence at scale. Learn more about the newest cloud integrations and product enhancements that make Neo4j an essential choice for developers building apps with interconnected data and generative AI.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
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3. Meshless Local Petrov-Galerkin Mixed Collocation Method 511
to first ignore the over-specified boundary conditions, guess the missing boundary
conditions, so that one can iteratively solve a direct problem, and minimize the dif-
ference between the solution and over-prescribed boundary conditions by adjusting
the guessed boundary fields, see [Kozlov, Maz’ya and Fomin (1991); Cimetiere,
Delvare, Jaoua and Pons (2001)] for example. This procedure is cumbersome and
expensive, and in many cases highly-dependent on the initial guess of the boundary
fields.
Recently, simple non-iterative methods have been under development for solv-
ing inverse problems without using the primal symmetric weak-form: with global
RBF as the trial function, collocation of the differential equation and boundary
conditions leads to the global primal RBF collocation method [Cheng and Cabral
(2005)]; with Kelvin’s solutions as trial function, collocation of the boundary con-
ditions leads to the method of fundamental solutions [Marin and Lesnic (2004)];
with non-singular general solutions as trial function, collocation of the boundary
conditions leads to the boundary particle method [Chen and Fu (2009)]; with Tr-
efftz trial functions, collocation of the boundary conditions leads to Trefftz collo-
cation method [Yeih, Liu, Kuo and Atluri (2010); Dong and Atluri (2012)]. The
common idea they share is that the collocation method is used to satisfy either the
differential equations and/or the boundary conditions at discrete points. Moreover,
collocation method is also more suitable for inverse problems because measure-
ments are most often made at discrete locations.
However, the above-mentioned direct collocation methods are mostly limited to
simple geometries, simple constitutive relations, and text-book problems, because:
(1) these methods are based on global trial functions, and lead to a fully-populated
coefficient matrix of the system of equations; (2) the general solutions and particu-
lar solutions cannot be easily found for general nonlinear problems, and problems
with arbitrary boundary conditions; (3) it is difficult to derive general solutions that
are complete for arbitrarily shaped domains, within a reasonable computational
burden. With this understanding, more suitable ways of constructing the trial func-
tions should be explored.
One of the most simple and flexible ways is to construct the trial functions through
meshless interpolations. Meshless interpolations have been combined with the
global Symmetric Galerkin Weak Form to develop the so-called Element-Free Ga-
lerkin (EFG) method, see [Belytschko, Lu, and Gu (1994)]. However, as shown
in the Weak Form (2), because temperatures and heat fluxes cannot be prescribed
at the same location, cumbersome iterative guessing and optimization will also be
necessary if EFG is used to solve inverse problems. Thus EFG is not suitable for
solving inverse problems, for the same reason why FEM is not suitable for solving
inverse problems.
5. Meshless Local Petrov-Galerkin Mixed Collocation Method 513
node using collocation method. The temperature and heat flux boundary condi-
tions are also enforced by collocation method at each measurement location along
the boundary. The proposed method is conceptually simple, numerically accurate,
and can directly solve the inverse problem without using any iterative optimization.
The outline of this paper is as follows: we start in section 2 by introducing the
meshless interpolation method with emphasis on the Moving Least Squares in-
terpolation. In section 3, the detailed algorithm of the MLPG mixed collocation
method for inverse heat transfer problem is given. In section 4, several numerical
examples are given to demonstrate the effectiveness of the current method involv-
ing direct and inverse heat transfer problems. Finally, we present some conclusions
in section 5.
2 Meshless Interpolation
Among the available meshless approximation schemes, the Moving Least Squares
(MLS) is generally considered to be one of the best methods to interpolate random
data with a reasonable accuracy, because of its locality, completeness, robustness
and continuity. The MLS is adopted in the current MLPG collocation formulation,
while the implementation of other meshless interpolation schemes is straightfor-
ward within the present framework. For completeness, the MLS formulation is
briefly reviewed here, while more detailed discussions on the MLS can be found in
[Atluri (2004)]
The MLS method starts by expressing the variable T(x) as polynomials:
T(x) = pT
(x)a(x) (3)
where pT (x) is the monomial basis. In this study, we use first-order interpolation,
so that pT (x) = [1,x,y] for two-dimensional problems. a(x) is a vector containing
the coefficients of each monomial basis, which can be determined by minimizing
the following weighted least square objective function, defined as:
J(a(x)) =
m
∑
I=1
wI
(x)[pT
(xI
)a(x)− ˆTI
]2
= [Pa(x)− ˆT]T
W[Pa(x)− ˆT]
(4)
where, xI,I = 1,2,··· ,m is a group of discrete nodes within the influence range of
node x, ˆTI is the fictitious nodal value, wI(x) is the weight function. A fourth order
7. Meshless Local Petrov-Galerkin Mixed Collocation Method 515
3.2 MLPG Mixed Collocation Method
We start by interpolating the temperature as well as the heat flux fields, using the
same MLS shape function, as discussed in section 2:
T(x) =
m
∑
J=1
ΦJ
(x) ˆTJ
(11)
qi(x) =
m
∑
J=1
ΦJ
(x) ˆqJ
i (12)
where, ˆTJand ˆqJ
i are the fictitious temperatures and heat fluxes at node J.
We rewrite equations (11) and (12) in matrix-vector form:
T = ΦΦΦ ˆT (13)
q = ΦΦΦˆq (14)
With the heat flux – temperature gradient relation as shown in equation (8), the heat
fluxes at node I can be expressed as:
qi(xI
) = −kT,i(xI
) = −k
m
∑
J=1
ΦJ
,i(xI
) ˆTJ
; I = 1,2,··· ,N (15)
where N is the total number of nodes in the domain.
This allows us to relate nodal heat fluxes to nodal temperatures, which is written
here in matrix-vector form:
q = Ka
ˆT (16)
And the balance equation of heat transfer is independently enforced at each node,
as:
m
∑
J=1
ΦJ
,x(xI
) ˆqJ
x +
m
∑
J=1
ΦJ
,y(xI
) ˆqJ
y = 0; I = 1,2,··· ,N (17)
or, in an equivalent Matrix-Vector from:
KS ˆq = 0 (18)
By substituting equation (16) and (14) into equation(18), we can obtain a dis-
cretized system of equations in term of nodal temperatures:
Keq
ˆT = 0 (19)
From equation (15) and (17), we see that both the heat transfer balance equation,
and the heat flux temperature-gradient relation are enforced by the collocation
method, at each node of the MLS interpolation. In the following subsection, the
same collocation method will be carried out to enforce the boundary conditions of
the inverse problem.
9. Meshless Local Petrov-Galerkin Mixed Collocation Method 517
This leads to the regularized solution:
T = KT
K+γI
−1
KT
f (24)
4 Numerical Examples
In this section, we firstly apply the proposed method to solve a direct problem with
an analytical solution, in order to verify the accuracy and efficiency of the method.
Then we apply the proposed method to solve three inverse Cauchy problems with
noisy measurements, in order to explore the accuracy, stability, and converge of the
MLPG mixed collocation method for solving inverse problems of heat transfer.
4.1 MLPG mixed collocation method for the direct heat transfer problem
Example 1: Patch Test
In this case, we consider a rectangular domain Ω = {(x,y)|0 ≤ x ≤ a,0 ≤ y ≤ b},
as shown in Figure 1. Its left boundary is maintained at the temperatureT = 0◦C,
and the right boundary is prescribed with a temperature distribution as T = Ay◦C
. The upper and lower boundaries are adiabatic. There is no heat source in the
domain. The thermal conductivity is k = 1w/(m·◦C). The analytical solution is:
T(x,y) =
Abx
2a
+
∞
∑
n=1
2Ab[cos(nπ)−1]
n2π2
sinh[nπx/b]cos[nπy/b]
sinh[anπ/b]
(25)
Figure 1: Heat conduction in a rectangular domain.
11. Meshless Local Petrov-Galerkin Mixed Collocation Method 519
In this example, we consider that a = b = 10, A = 5, and use a uniform nodal
configuration of 30×30nodes. When the support domain is too small or too large,
the relative computational error will become unacceptably large. It was found that
r = 2.5−3.0 is an economical choice that gives good results without significantly
increasing the computational burden, see [Wu, Shen, and Tao (2007)]. We select a
support size of 25 times of the nodal distance, and use the first-order polynomial
basis is used in the MLS approximations.
We solve this problem by using the MLPG mixed collocation method. Figure 2
gives the analytically and numerically solved temperature and heat fluxes, normal-
ized to their maximum values. It can be seen that the computational results with
MLPG mixed collocation method agrees well with the analytical solutions.
4.2 MLPG mixed collocation method for Cauchy inverse problem of heat trans-
fer
Example 2: An L-shaped Domain
Figure 3: Heat transfer in an L-shape domain.
The second example is a Cauchy inverse heat transfer problem in the L-shaped
domain as illustrated in Figure 3 The exact solution is given in the polar coordinates
by:
T(r,θ) = r
2
3 sin(
2θ −π
3
) (26)
13. Meshless Local Petrov-Galerkin Mixed Collocation Method 521
Figure 5: T, qx, and qy along the line y = −1, normalized to their maximum values,
for the inverse problem of Example2.
15. Meshless Local Petrov-Galerkin Mixed Collocation Method 523
Figure 8: T qx, and qy along the line y = 0.5, normalized to their maximum values,
for the inverse problem of Example 3.
17. Meshless Local Petrov-Galerkin Mixed Collocation Method 525
Figure 9: The numerically identified (a) T (b) qx, (c)qy along the line y = 3 with
various levels of noise added into the prescribed temperatures (the Dirichlet data),
i.e. pT ∈ {1%,3%,5%} for the Cauchy problem given by example 4.
19. Meshless Local Petrov-Galerkin Mixed Collocation Method 527
Figure 11: The numerically identified (a) T (b) qx, (c) qy along the line y = 3with
various levels of noise added into the prescribed temperatures and heat fluxes (the
Cauchy data), i.e. pq = pT ∈ {1%,3%,5%} for the Cauchy problem given by
example 4.
21. Meshless Local Petrov-Galerkin Mixed Collocation Method 529
where Tqx, qy and Tqx, qy represent, respectively, the numerical and exact values.
Table 1 and figure 12 present the numerical error of identified temperatures and heat
fluxes with different number of the collocation points, from where the numerical
convergence can be observed. It can be seen that all errors Eqx Eqy and ET keep
decreasing as the number of the collocation points increases. When nc is more than
102, the convergence rate of the aforementioned slows down, which is possibly due
to the presence of noisy measurements.
c. Influence of the size of SC
Figure 13: Four different sizes of accessible boundary (S1
c,S2
c,S3
c,S4
c), respectively.
In this case, we investigate how the size of SC affects the accuracy of the numerical
solution. For the given Cauchy problem, measured temperatures and heat fluxes are
contaminated with with 5% random noise. Four different sizes of Sc are considered
23. Meshless Local Petrov-Galerkin Mixed Collocation Method 531
method. It is shown that the proposed method is simple, accurate, stable, and thus
is suitable for solving inverse problems of heat transfer.
Acknowledgement: The first author acknowledges the financial Supported by
the National High Technology research and Development Program of China (863
Program, grant No. 2012AA112201) . This work was funded by the Deanship of
Scientific Research (DSR), King Abdulaziz University, under grant No. (3-130-25-
HiCi). The authors, therefore, acknowledge the technical and financial support of
KAU.
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