chemistry gcse Particles and Purification.pptx
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The document discusses various methods of separating mixtures and determining purity, including paper chromatography, distillation, crystallization, filtration, and decanting. Paper chromatography can separate pigments in a mixture using their differing solubilities and attractions to filter paper. Distillation and fractional distillation can separate liquids based on their different boiling points. The purity of a substance can be determined by its sharp melting or boiling point compared to a mixture which melts or boils over a range. Methods like filtration and crystallization are used to purify mixtures by separating solids from liquids.
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Inter-Society Networking Panel GRSS/MTT-S/CIS Panel Session: Promoting Connection and Cooperation
https://www.etran.rs/2024/en/home-english/Equivariant neural networks and representation theory
Or: Beyond linear.
Abstract: Equivariant neural networks are neural networks that incorporate symmetries. The nonlinear activation functions in these networks result in interesting nonlinear equivariant maps between simple representations, and motivate the key player of this talk: piecewise linear representation theory.
Disclaimer: No one is perfect, so please mind that there might be mistakes and typos.
dtubbenhauer@gmail.com
Corrected slides: dtubbenhauer.com/talks.html
EWOCS-I: The catalog of X-ray sources in Westerlund 1 from the Extended Weste...
Context. With a mass exceeding several 104 M⊙ and a rich and dense population of massive stars, supermassive young star clusters
represent the most massive star-forming environment that is dominated by the feedback from massive stars and gravitational interactions
among stars.
Aims. In this paper we present the Extended Westerlund 1 and 2 Open Clusters Survey (EWOCS) project, which aims to investigate
the influence of the starburst environment on the formation of stars and planets, and on the evolution of both low and high mass stars.
The primary targets of this project are Westerlund 1 and 2, the closest supermassive star clusters to the Sun.
Methods. The project is based primarily on recent observations conducted with the Chandra and JWST observatories. Specifically,
the Chandra survey of Westerlund 1 consists of 36 new ACIS-I observations, nearly co-pointed, for a total exposure time of 1 Msec.
Additionally, we included 8 archival Chandra/ACIS-S observations. This paper presents the resulting catalog of X-ray sources within
and around Westerlund 1. Sources were detected by combining various existing methods, and photon extraction and source validation
were carried out using the ACIS-Extract software.
Results. The EWOCS X-ray catalog comprises 5963 validated sources out of the 9420 initially provided to ACIS-Extract, reaching a
photon flux threshold of approximately 2 × 10−8 photons cm−2
s
−1
. The X-ray sources exhibit a highly concentrated spatial distribution,
with 1075 sources located within the central 1 arcmin. We have successfully detected X-ray emissions from 126 out of the 166 known
massive stars of the cluster, and we have collected over 71 000 photons from the magnetar CXO J164710.20-455217.
Shallowest Oil Discovery of Turkiye.pptx
The Petroleum System of the Çukurova Field - the Shallowest Oil Discovery of Türkiye, Adana
Describing and Interpreting an Immersive Learning Case with the Immersion Cub...
Current descriptions of immersive learning cases are often difficult or impossible to compare. This is due to a myriad of different options on what details to include, which aspects are relevant, and on the descriptive approaches employed. Also, these aspects often combine very specific details with more general guidelines or indicate intents and rationales without clarifying their implementation. In this paper we provide a method to describe immersive learning cases that is structured to enable comparisons, yet flexible enough to allow researchers and practitioners to decide which aspects to include. This method leverages a taxonomy that classifies educational aspects at three levels (uses, practices, and strategies) and then utilizes two frameworks, the Immersive Learning Brain and the Immersion Cube, to enable a structured description and interpretation of immersive learning cases. The method is then demonstrated on a published immersive learning case on training for wind turbine maintenance using virtual reality. Applying the method results in a structured artifact, the Immersive Learning Case Sheet, that tags the case with its proximal uses, practices, and strategies, and refines the free text case description to ensure that matching details are included. This contribution is thus a case description method in support of future comparative research of immersive learning cases. We then discuss how the resulting description and interpretation can be leveraged to change immersion learning cases, by enriching them (considering low-effort changes or additions) or innovating (exploring more challenging avenues of transformation). The method holds significant promise to support better-grounded research in immersive learning.
waterlessdyeingtechnolgyusing carbon dioxide chemicalspdf
The technology uses reclaimed CO₂ as the dyeing medium in a closed loop process. When pressurized, CO₂ becomes supercritical (SC-CO₂). In this state CO₂ has a very high solvent power, allowing the dye to dissolve easily.
Micronuclei test.M.sc.zoology.fisheries.
Current Ms word generated power point presentation covers major details about the micronuclei test. It's significance and assays to conduct it. It is used to detect the micronuclei formation inside the cells of nearly every multicellular organism. It's formation takes place during chromosomal sepration at metaphase.
20240520 Planning a Circuit Simulator in JavaScript.pptx
Evaporation step counter work. I have done a physical experiment.
(Work in progress.)
The binding of cosmological structures by massless topological defects
Assuming spherical symmetry and weak field, it is shown that if one solves the Poisson equation or the Einstein field
equations sourced by a topological defect, i.e. a singularity of a very specific form, the result is a localized gravitational
field capable of driving flat rotation (i.e. Keplerian circular orbits at a constant speed for all radii) of test masses on a thin
spherical shell without any underlying mass. Moreover, a large-scale structure which exploits this solution by assembling
concentrically a number of such topological defects can establish a flat stellar or galactic rotation curve, and can also deflect
light in the same manner as an equipotential (isothermal) sphere. Thus, the need for dark matter or modified gravity theory is
mitigated, at least in part.
Bob Reedy - Nitrate in Texas Groundwater.pdf
Presented at June 6-7 Texas Alliance of Groundwater Districts Business Meeting
Compexometric titration/Chelatorphy titration/chelating titration
Classification
Metal ion ion indicators
Masking and demasking reagents
Estimation of Magnisium sulphate
Calcium gluconate
Complexometric Titration/ chelatometry titration/chelating titration, introduction, Types-
1.Direct Titration
2.Back Titration
3.Replacement Titration
4.Indirect Titration
Masking agent, Demasking agents
formation of complex
comparition between masking and demasking agents,
Indicators/Metal ion indicators/ Metallochromic indicators/pM indicators,
Visual Technique,PM indicators (metallochromic), Indicators of pH, Redox Indicators
Instrumental Techniques-Photometry
Potentiometry
Miscellaneous methods.
Complex titration with EDTA.
Travis Hills' Endeavors in Minnesota: Fostering Environmental and Economic Pr...
Travis Hills of Minnesota developed a method to convert waste into high-value dry fertilizer, significantly enriching soil quality. By providing farmers with a valuable resource derived from waste, Travis Hills helps enhance farm profitability while promoting environmental stewardship. Travis Hills' sustainable practices lead to cost savings and increased revenue for farmers by improving resource efficiency and reducing waste.
Deep Software Variability and Frictionless Reproducibility
Deep Software Variability and Frictionless ReproducibilityUniversity of Rennes, INSA Rennes, Inria/IRISA, CNRS
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
Phenomics assisted breeding in crop improvement
As the population is increasing and will reach about 9 billion upto 2050. Also due to climate change, it is difficult to meet the food requirement of such a large population. Facing the challenges presented by resource shortages, climate
change, and increasing global population, crop yield and quality need to be improved in a sustainable way over the coming decades. Genetic improvement by breeding is the best way to increase crop productivity. With the rapid progression of functional
genomics, an increasing number of crop genomes have been sequenced and dozens of genes influencing key agronomic traits have been identified. However, current genome sequence information has not been adequately exploited for understanding
the complex characteristics of multiple gene, owing to a lack of crop phenotypic data. Efficient, automatic, and accurate technologies and platforms that can capture phenotypic data that can
be linked to genomics information for crop improvement at all growth stages have become as important as genotyping. Thus,
high-throughput phenotyping has become the major bottleneck restricting crop breeding. Plant phenomics has been defined as the high-throughput, accurate acquisition and analysis of multi-dimensional phenotypes
during crop growing stages at the organism level, including the cell, tissue, organ, individual plant, plot, and field levels. With the rapid development of novel sensors, imaging technology,
and analysis methods, numerous infrastructure platforms have been developed for phenotyping.
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chemistry gcse Particles and Purification.pptx
- 2. 1.PARTICLES AND PURIFICATION PART 1 1.1 SOLIDS, LIQUID, GASES 1.2 DIFFUSION 1.3 APPARATUS FOR MEASURING PART 2 1.4 PAPER CHROMATOGRAPHY 1.5 PURITY OF SUBSTANCE 1.6 METHOD OF PURIFICATION
- 3. Paper chromatography the method of separating pigments(coloured substances) using filter paper
- 4. FACTORS DETERMINING HOW FAST THE PIGMENTS MOVE ACROSS THE FILTER PAPER The pigment have different solubilities in the solvent The pigment have different degrees of attraction for the the filter paprer The type of solvent also effect how far the pigment will travel across the paper USES OF CHROMATOGRAPHY: 1.identifing the substances in the mixture 2.Seperation and purification of the substance in the mixture
- 7. PURE SUBSTANCES • A PURE SUBSTANCE CONSISTS ONLY OF ONE ELEMENT OR ONE COMPOUND • A MIXTURE CONSISTS OF TWO OR MORE DIFFERENT SUBSTANCES, NOT CHEMICALLY JOINED TOGETHER • DIFFERENT TYPES OF CHEMICAL SUBSTANCE • AN ELEMENT CONTAINS JUST ONE TYPE OF ATOM • A COMPOUND CONTAINS TWO OR MORE TYPES OF ATOM JOINED TOGETHER • A MIXTURE CONTAINS TWO OR MORE DIFFERENT SUBSTANCES THAT ARE NOT JOINED TOGETHER • THE DIFFERENT SUBSTANCES IN A MIXTURE CAN BE ELEMENTS OR COMPOUNDS
- 8. THE DIFFERENCE BETWEEN COMPOUND AND MIXTURE COMPOUND • COMPOUND HAVE A FIXED COMPOSITION(THE RATIO OF ELEMENTS PRESENT IS ALWAYS THE SAME IN ANY PARTICULAR COMPOUND). • CHEMICAL REACTION MUST BE USED TO SEPARATE THE ELEMENTS IN A COMPOUND. • THERE ARE CHEMICAL BOUNDS BETWEEN ATOMS OF THE DIFFERENT ELEMENTS IN THE COMPOUND. MIXTURE • MIXTURES HAVE NO FIXED COMPOSITION(THE PROPORTIONS VARY DEPENDING ON THE AMOUNT OF EACH SUBSTANCE MIXED TOGETHER) • THE DIFFERENT ELEMENT OR COMPOUNDS IN A MIXTURE CAN BE SEPARATED AGAIN MORE EASILY ( BY PHYSICAL MEANS USING THE DIFFERENCES IN PROPERTIES OF EACH SUBSTANCE IN A MIXTURE) • THERE ARE NO CHEMICAL BONDS BETWEEN ATOMS OF DIFFERENT SUBSTANCES IN A MIXTURE.
- 9. PURITY OF SUBSTANCE • WHY PURITY IS IMPORTANT • PURE ORANGE JUICE • DISTILLED WATER • MEDICINAL DRUGS • PURE SILICON • HOW DO WE KNOW IF THE SUBSTANCE IS PURE • CHROMATOGRAPHY • MELTING AND BOILING POINT • EFFECT OF IMPURITIES ON MELTING AND BOILING POINT • THE MP AND BP ARE NOT SHARP IN IMPURE SUBSTANCE • THE BP INCREASED BY IMPURITIES • THE MP DECREASES BY IMPURITIES
- 10. Distinguishing between pure substances and mixtures Pure substances have a sharp melting point but mixtures melt over a range of temperatures. This difference is most easily seen when the temperature of a hot liquid is measured as it cools and freezes. The graph shows the cooling curve for a sample of a compound called salol. A cooling curve for salol The temperature stays the same while a pure substance changes state The horizontal part of the graph shows that the salol has a sharp melting point, so it is pure. Impure salol (a mixture of salol and other substances) would produce a gradual decrease over a range of temperatures as it freezes. Graph of the freezing and melting range of a sunstance, between 40 c and 50 c. The temperature changes slightly as an impure substance changes state
- 11. HOW DO WE PURIFY MIXTURES • SOLIDS FROM LIQUIDS • FILTRATION • DECANTING • CENTRIFUGATION • WASHED AND REMOVED • DISSOLVED SOLIDS FROM LIQUIDS • EVAPORATION • LIQUIDS FROM LIQUIDS • FRACTIONAL DISTILLATION
- 12. SEPARATING A SOLID FROM A SOLUTION FILTRATION DECANTING CENTRIFUGE CRYSTALLIZATION
- 14. PURIFICATION SIMPLE DISTILLATION AND FRACTIONAL DISTILLATION
- 15. PURIFICATION PURIFY THE MIXTURE OF SALT AND SAND • ADD WATER TO DISSOLVE THE SALT • SEPARATE SANT AND SALT BY FILLTRATION • USE THE PROCESS OF CRYSTALLIZATION TO FORM SALT CRYSTALS • RISN THE SAND WITH DISTILLED WATER • DRY THE SAND AND SALT CRYSTALS SEPERATELY ON FILTER