Matter is anything that occupies space and has mass. It is the substance of which physical objects are composed. Matter is made up of atoms, which are the basic building blocks of all elements. At the atomic and subatomic levels, matter exhibits particle-like behavior.
There are three classical states of matter:
Solid: In a solid state, particles are closely packed together, and they vibrate but do not move from their fixed positions. Solids have a definite shape and volume.
Liquid: In a liquid state, particles are still close together, but they have more freedom to move. Liquids have a definite volume, but they take the shape of their container.
Gas: In a gaseous state, particles have a lot of freedom to move. Gases do not have a definite shape or volume and expand to fill the shape of their container.
cing:
Dereferencing a pointer means accessing the value stored at the memory address it points to.
The dereference operator (*) is used to retrieve the value from a pointer. For example, int y = *ptr; assigns the value at the memory location pointed to by ptr to the variable y.
Null Pointers:
A null pointer does not point to any memory location. It is often used to indicate that the pointer is not currently pointing to a valid object.
Initializing a pointer to nullptr (in C++) or NULL (in C) sets it to a null value.
Pointer Arithmetic:
Pointer arithmetic involves m
Matter is anything that occupies space and has mass. It is the substance of which physical objects are composed. Matter is made up of atoms, which are the basic building blocks of all elements. At the atomic and subatomic levels, matter exhibits particle-like behavior.
There are three classical states of matter:
Solid: In a solid state, particles are closely packed together, and they vibrate but do not move from their fixed positions. Solids have a definite shape and volume.
Liquid: In a liquid state, particles are still close together, but they have more freedom to move. Liquids have a definite volume, but they take the shape of their container.
Gas: In a gaseous state, particles have a lot of freedom to move. Gases do not have a definite shape or volume and expand to fill the shape of their container.
cing:
Dereferencing a pointer means accessing the value stored at the memory address it points to.
The dereference operator (*) is used to retrieve the value from a pointer. For example, int y = *ptr; assigns the value at the memory location pointed to by ptr to the variable y.
Null Pointers:
A null pointer does not point to any memory location. It is often used to indicate that the pointer is not currently pointing to a valid object.
Initializing a pointer to nullptr (in C++) or NULL (in C) sets it to a null value.
Pointer Arithmetic:
Pointer arithmetic involves m
Enhancing Performance with Globus and the Science DMZGlobus
ESnet has led the way in helping national facilities—and many other institutions in the research community—configure Science DMZs and troubleshoot network issues to maximize data transfer performance. In this talk we will present a summary of approaches and tips for getting the most out of your network infrastructure using Globus Connect Server.
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.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
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.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
The Metaverse and AI: how can decision-makers harness the Metaverse for their...Jen Stirrup
The Metaverse is popularized in science fiction, and now it is becoming closer to being a part of our daily lives through the use of social media and shopping companies. How can businesses survive in a world where Artificial Intelligence is becoming the present as well as the future of technology, and how does the Metaverse fit into business strategy when futurist ideas are developing into reality at accelerated rates? How do we do this when our data isn't up to scratch? How can we move towards success with our data so we are set up for the Metaverse when it arrives?
How can you help your company evolve, adapt, and succeed using Artificial Intelligence and the Metaverse to stay ahead of the competition? What are the potential issues, complications, and benefits that these technologies could bring to us and our organizations? In this session, Jen Stirrup will explain how to start thinking about these technologies as an organisation.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Climate Impact of Software Testing at Nordic Testing DaysKari Kakkonen
My slides at Nordic Testing Days 6.6.2024
Climate impact / sustainability of software testing discussed on the talk. ICT and testing must carry their part of global responsibility to help with the climat warming. We can minimize the carbon footprint but we can also have a carbon handprint, a positive impact on the climate. Quality characteristics can be added with sustainability, and then measured continuously. Test environments can be used less, and in smaller scale and on demand. Test techniques can be used in optimizing or minimizing number of tests. Test automation can be used to speed up testing.
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.
zkStudyClub - Reef: Fast Succinct Non-Interactive Zero-Knowledge Regex ProofsAlex Pruden
This paper presents Reef, a system for generating publicly verifiable succinct non-interactive zero-knowledge proofs that a committed document matches or does not match a regular expression. We describe applications such as proving the strength of passwords, the provenance of email despite redactions, the validity of oblivious DNS queries, and the existence of mutations in DNA. Reef supports the Perl Compatible Regular Expression syntax, including wildcards, alternation, ranges, capture groups, Kleene star, negations, and lookarounds. Reef introduces a new type of automata, Skipping Alternating Finite Automata (SAFA), that skips irrelevant parts of a document when producing proofs without undermining soundness, and instantiates SAFA with a lookup argument. Our experimental evaluation confirms that Reef can generate proofs for documents with 32M characters; the proofs are small and cheap to verify (under a second).
Paper: https://eprint.iacr.org/2023/1886
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdf
(Lesson 1) intro to matter
1. •Matter is everywhere-even in the air!
•What are the following familiar objects? How can you
describe them if you didn't know what they were?
• Describing objects by using:
1) Size
2) Shape
3) Color
4) Texture
2. •We used an object's properties. A property describes
how an object looks, feels, or acts.
•Lets check out some objects to see if we can get their
properties:
http://www.nyu.edu/pages/mathmol/textbook/whatismatter.html
3. •Properties of all objects
1) Objects take up space.
All objects take up space. Your computer is taking up
space on the desk. You are taking up space on the
chair.
2) Objects have mass.
Mass is how much there is of an object. Mass is
related to how much something weighs. Mass and
weight are two different things. The unit for mass is a
gram. A nickel has the mass of about one gram.
4. •Anything that takes up space and has mass is matter.
• Everything around you is made up of matter.
•Chocolate cake is made up of matter.
•You are made of matter.
•If you are having trouble understanding matter, look
all around you.
•You can see matter makes up the walls of your house
and your classroom.
•Matter is large and matter is small. Do you get it yet?
5. Let's take this carrot:
•Let's get closer and closer to the smaller parts of the
carrot: carrot atoms!
•These small parts of the carrot are called atoms.
•Anything you see and can feel is made of atoms.
•All atoms are too small to be seen with the naked eye or
even a microscope, although there are some new types of
microscopes that are now able to see larger atoms such as
gold.
6. •All matter is the same because all matter is made up
of atoms.
•Matter is also different because objects can be made
up of different kinds of atoms.
•Gold is made of one kind of atom-gold atoms.
•Salt is made up of two different kinds of atoms-
sodium atoms and chloride atoms.
7. HOMEWORK
1) How would you describe your desk?
2) What is the definition of matter?
3) Give 3 examples of matter.
4) What are atoms?
5) Why is matter different?
