Концепция проекта помощи окружающим. Я помогу трем людям, и другие люди помогут мне в осуществлении моей Мечты. Если вам интересен проект и вы готовы его поддержать, пишите мне на почту или в соц сети!;)
Desenvolvimento de aço com usinabilidade melhoria para moldes para plástico d...Lepuufu
A fabricação de moldes de grande porte exige a produção na aciaria de lingotes de
dimensões acima do usual. De forma a garantir a polibilidade do produto acabado, o material
não pode apresentar forte segregação, nível elevado de inclusões não metálicas ou
porosidades. Para tanto, é necessária a obtenção de reduzidos teores de enxofre e a execução
de elevada deformação mecânica no processo de conformação, principalmente em se
tratando de grandes lingotes. Contudo, a redução do teor de enxofre prejudica a
usinabilidade o que, sem outras alterações, encarece a fabricação do molde. Neste trabalho, é
apresentada a tecnologia de fabricação do bloco para o maior molde já produzido com aço
manufaturado no Brasil no qual o teor de enxofre foi reduzido abaixo de 50 ppm e a
usinabilidade foi mantida através da modificação da morfologia das inclusões através da
desoxidação por cálcio.
Концепция проекта помощи окружающим. Я помогу трем людям, и другие люди помогут мне в осуществлении моей Мечты. Если вам интересен проект и вы готовы его поддержать, пишите мне на почту или в соц сети!;)
Desenvolvimento de aço com usinabilidade melhoria para moldes para plástico d...Lepuufu
A fabricação de moldes de grande porte exige a produção na aciaria de lingotes de
dimensões acima do usual. De forma a garantir a polibilidade do produto acabado, o material
não pode apresentar forte segregação, nível elevado de inclusões não metálicas ou
porosidades. Para tanto, é necessária a obtenção de reduzidos teores de enxofre e a execução
de elevada deformação mecânica no processo de conformação, principalmente em se
tratando de grandes lingotes. Contudo, a redução do teor de enxofre prejudica a
usinabilidade o que, sem outras alterações, encarece a fabricação do molde. Neste trabalho, é
apresentada a tecnologia de fabricação do bloco para o maior molde já produzido com aço
manufaturado no Brasil no qual o teor de enxofre foi reduzido abaixo de 50 ppm e a
usinabilidade foi mantida através da modificação da morfologia das inclusões através da
desoxidação por cálcio.
The behaviour of materials in machining the influence of small tellurium ad...Lepuufu
The behaviour of materials in machining - the influence of small tellurium additions on the microstructure and machining behaviour of low carbon free cutting steels
Historical analysis of metal cutting shows that metal removal rates have been increasing in the course of the century, predicated by the advancement in tool materials but the steel design has lagged behind. This paper examines the mechanisms of chip formation and tool wear as a function of cutting speed in metal cutting. Chemical wear is identified as the dominant mechanism of tool wear at high cutting speeds caused by temperature rise due to shear localisation in the primary and secondary shear zones of chip. Shear localisation in the primary shear zone is shown to be influenced by both microstructural parameters, i.e. matrix hardening and second phase particles, and metal cutting variables, i.e. cutting speed (strain rate) and feed (pressure).
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
The behaviour of materials in machining the influence of small tellurium ad...Lepuufu
The behaviour of materials in machining - the influence of small tellurium additions on the microstructure and machining behaviour of low carbon free cutting steels
Historical analysis of metal cutting shows that metal removal rates have been increasing in the course of the century, predicated by the advancement in tool materials but the steel design has lagged behind. This paper examines the mechanisms of chip formation and tool wear as a function of cutting speed in metal cutting. Chemical wear is identified as the dominant mechanism of tool wear at high cutting speeds caused by temperature rise due to shear localisation in the primary and secondary shear zones of chip. Shear localisation in the primary shear zone is shown to be influenced by both microstructural parameters, i.e. matrix hardening and second phase particles, and metal cutting variables, i.e. cutting speed (strain rate) and feed (pressure).
The ability to recreate computational results with minimal effort and actionable metrics provides a solid foundation for scientific research and software development. When people can replicate an analysis at the touch of a button using open-source software, open data, and methods to assess and compare proposals, it significantly eases verification of results, engagement with a diverse range of contributors, and progress. However, we have yet to fully achieve this; there are still many sociotechnical frictions.
Inspired by David Donoho's vision, this talk aims to revisit the three crucial pillars of frictionless reproducibility (data sharing, code sharing, and competitive challenges) with the perspective of deep software variability.
Our observation is that multiple layers — hardware, operating systems, third-party libraries, software versions, input data, compile-time options, and parameters — are subject to variability that exacerbates frictions but is also essential for achieving robust, generalizable results and fostering innovation. I will first review the literature, providing evidence of how the complex variability interactions across these layers affect qualitative and quantitative software properties, thereby complicating the reproduction and replication of scientific studies in various fields.
I will then present some software engineering and AI techniques that can support the strategic exploration of variability spaces. These include the use of abstractions and models (e.g., feature models), sampling strategies (e.g., uniform, random), cost-effective measurements (e.g., incremental build of software configurations), and dimensionality reduction methods (e.g., transfer learning, feature selection, software debloating).
I will finally argue that deep variability is both the problem and solution of frictionless reproducibility, calling the software science community to develop new methods and tools to manage variability and foster reproducibility in software systems.
Exposé invité Journées Nationales du GDR GPL 2024
Toxic effects of heavy metals : Lead and Arsenicsanjana502982
Heavy metals are naturally occuring metallic chemical elements that have relatively high density, and are toxic at even low concentrations. All toxic metals are termed as heavy metals irrespective of their atomic mass and density, eg. arsenic, lead, mercury, cadmium, thallium, chromium, etc.
Professional air quality monitoring systems provide immediate, on-site data for analysis, compliance, and decision-making.
Monitor common gases, weather parameters, particulates.
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
What is greenhouse gasses and how many gasses are there to affect the Earth.moosaasad1975
What are greenhouse gasses how they affect the earth and its environment what is the future of the environment and earth how the weather and the climate effects.
Remote Sensing and Computational, Evolutionary, Supercomputing, and Intellige...University of Maribor
Slides from talk:
Aleš Zamuda: Remote Sensing and Computational, Evolutionary, Supercomputing, and Intelligent Systems.
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/
