1. The document discusses the history of the idea of black holes, from early proposals by John Michell and Pierre-Simon Laplace to modern understanding through Einstein's theory of general relativity.
2. It describes how black holes are formed when massive stars collapse under their own gravity after exhausting their nuclear fuel. This can cause the star to completely disappear within an event horizon.
3. The document explores how astronomers can observe black holes through their effects on nearby matter like heating gas to high temperatures visible through X-ray and gamma ray emissions, and through the orbital motions of companion stars.
"Planet Formation in Dense Star Clusters" presented by Dr. Henry Throop (Uni...Rene Kotze
NITheP WITS node seminar
"Planet Formation in Dense Star Clusters"
to be presented by Dr. Henry Throop (University of Pretoria)
http://www.nithep.ac.za/4hu.htm
"Planet Formation in Dense Star Clusters" presented by Dr. Henry Throop (Uni...Rene Kotze
NITheP WITS node seminar
"Planet Formation in Dense Star Clusters"
to be presented by Dr. Henry Throop (University of Pretoria)
http://www.nithep.ac.za/4hu.htm
Astronomy - State of the Art - GalaxiesChris Impey
Astronomy - State of the Art is a course covering the hottest topics in astronomy. In this section, the properties of galaxies are discussed, including supermassive black holes and dark matter.
search on NASA site also go through the latest news related to black holes before presenting your seminar.
many queries are asked related to black holes.
present the astronomical data's for Good delivery of seminar.In the 18th century John Michell and Pierre-Simon Laplace first mentioned about the objects with a huge gravitation, from which even light cannot escape.
In 1915 Albert Einstein developed the theory of general relativity.
Karl Schwarzschild finds black holes as a solution to Einstein’s equations (1916)
Robert Oppenheimer and Hartland Snyder predict that massive stars can collapse into black holes (1939)
A black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull.”
Black holes are exotic structures whose gravitational fields are so powerful that they trap everything, even light. They were first postulated by Albert Einstein's theory of general relativity.”
This can happen when a star is dying.
Though they are black they are invisible to us.
The density of a black hole is so great it would be like taking the whole Earth and crushing into a volume smaller than a 1” marble!.
Stellar-mass: 3 to 20 times the mass of our Sun
Supermassive: Black holes with millions to billions of times the mass of our Sun
Mid-mass: In between stellar-mass and supermassive.
Quasar and Microquasar Series - Microquasars in our GalaxySérgio Sacani
Microquasars are stellar-mass black holes in our Galaxy that mimic, on a smaller scale, many of the phenomena seen in
quasars. Their discovery opens the way for a new understanding of the connection between the accretion of matter
onto black holes and the origin of the relativistic jets observed in remote quasars.
FROM UNDERSTANDING BASIC PARTICLE PHYSICS —to exploring the Universe During the first half of 2013, a number of startling advances in astro-particle physics have been announced. In addition to this--the next ultra large cosmic ray experiment is being developed, regions of the world (including southwest Kansas) tested for their suitability to host such an experiment. In this talk you will get a brief introduction of the ideas of particle physics and how they are being transformed into astro-particle measurements to further understand the Universe and the forces within it.
In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
UiPath Test Automation using UiPath Test Suite series, part 6DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 6. In this session, we will cover Test Automation with generative AI and Open AI.
UiPath Test Automation with generative AI and Open AI webinar offers an in-depth exploration of leveraging cutting-edge technologies for test automation within the UiPath platform. Attendees will delve into the integration of generative AI, a test automation solution, with Open AI advanced natural language processing capabilities.
Throughout the session, participants will discover how this synergy empowers testers to automate repetitive tasks, enhance testing accuracy, and expedite the software testing life cycle. Topics covered include the seamless integration process, practical use cases, and the benefits of harnessing AI-driven automation for UiPath testing initiatives. By attending this webinar, testers, and automation professionals can gain valuable insights into harnessing the power of AI to optimize their test automation workflows within the UiPath ecosystem, ultimately driving efficiency and quality in software development processes.
What will you get from this session?
1. Insights into integrating generative AI.
2. Understanding how this integration enhances test automation within the UiPath platform
3. Practical demonstrations
4. Exploration of real-world use cases illustrating the benefits of AI-driven test automation for UiPath
Topics covered:
What is generative AI
Test Automation with generative AI and Open AI.
UiPath integration with generative AI
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
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.
Pushing the limits of ePRTC: 100ns holdover for 100 daysAdtran
At WSTS 2024, Alon Stern explored the topic of parametric holdover and explained how recent research findings can be implemented in real-world PNT networks to achieve 100 nanoseconds of accuracy for up to 100 days.
A tale of scale & speed: How the US Navy is enabling software delivery from l...sonjaschweigert1
Rapid and secure feature delivery is a goal across every application team and every branch of the DoD. The Navy’s DevSecOps platform, Party Barge, has achieved:
- Reduction in onboarding time from 5 weeks to 1 day
- Improved developer experience and productivity through actionable findings and reduction of false positives
- Maintenance of superior security standards and inherent policy enforcement with Authorization to Operate (ATO)
Development teams can ship efficiently and ensure applications are cyber ready for Navy Authorizing Officials (AOs). In this webinar, Sigma Defense and Anchore will give attendees a look behind the scenes and demo secure pipeline automation and security artifacts that speed up application ATO and time to production.
We will cover:
- How to remove silos in DevSecOps
- How to build efficient development pipeline roles and component templates
- How to deliver security artifacts that matter for ATO’s (SBOMs, vulnerability reports, and policy evidence)
- How to streamline operations with automated policy checks on container images
How to Get CNIC Information System with Paksim Ga.pptxdanishmna97
Pakdata Cf is a groundbreaking system designed to streamline and facilitate access to CNIC information. This innovative platform leverages advanced technology to provide users with efficient and secure access to their CNIC details.
GraphSummit Singapore | The Future of Agility: Supercharging Digital Transfor...Neo4j
Leonard Jayamohan, Partner & Generative AI Lead, Deloitte
This keynote will reveal how Deloitte leverages Neo4j’s graph power for groundbreaking digital twin solutions, achieving a staggering 100x performance boost. Discover the essential role knowledge graphs play in successful generative AI implementations. Plus, get an exclusive look at an innovative Neo4j + Generative AI solution Deloitte is developing in-house.
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.
Building RAG with self-deployed Milvus vector database and Snowpark Container...Zilliz
This talk will give hands-on advice on building RAG applications with an open-source Milvus database deployed as a docker container. We will also introduce the integration of Milvus with Snowpark Container Services.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
GridMate - End to end testing is a critical piece to ensure quality and avoid...ThomasParaiso2
End to end testing is a critical piece to ensure quality and avoid regressions. In this session, we share our journey building an E2E testing pipeline for GridMate components (LWC and Aura) using Cypress, JSForce, FakerJS…
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
Goodbye Windows 11: Make Way for Nitrux Linux 3.5.0!SOFTTECHHUB
As the digital landscape continually evolves, operating systems play a critical role in shaping user experiences and productivity. The launch of Nitrux Linux 3.5.0 marks a significant milestone, offering a robust alternative to traditional systems such as Windows 11. This article delves into the essence of Nitrux Linux 3.5.0, exploring its unique features, advantages, and how it stands as a compelling choice for both casual users and tech enthusiasts.
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
Communications Mining Series - Zero to Hero - Session 1DianaGray10
This session provides introduction to UiPath Communication Mining, importance and platform overview. You will acquire a good understand of the phases in Communication Mining as we go over the platform with you. Topics covered:
• Communication Mining Overview
• Why is it important?
• How can it help today’s business and the benefits
• Phases in Communication Mining
• Demo on Platform overview
• Q/A
Unlock the Future of Search with MongoDB Atlas_ Vector Search Unleashed.pdfMalak Abu Hammad
Discover how MongoDB Atlas and vector search technology can revolutionize your application's search capabilities. This comprehensive presentation covers:
* What is Vector Search?
* Importance and benefits of vector search
* Practical use cases across various industries
* Step-by-step implementation guide
* Live demos with code snippets
* Enhancing LLM capabilities with vector search
* Best practices and optimization strategies
Perfect for developers, AI enthusiasts, and tech leaders. Learn how to leverage MongoDB Atlas to deliver highly relevant, context-aware search results, transforming your data retrieval process. Stay ahead in tech innovation and maximize the potential of your applications.
#MongoDB #VectorSearch #AI #SemanticSearch #TechInnovation #DataScience #LLM #MachineLearning #SearchTechnology
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
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
3. The idea of a Black hole John Michell (1783), Pierre-Simon Laplace (1796):
What happens if the escape speed from an object is greater than the
speed of light?
If light consist of particles of matter, they would not be able to escape
Dark star
The cath: early 19th cent-light is a wave (a disturbance), not a particle
Black hole idea forgotten
…until Einstein comes along
63. If Black Holes Are Black, How Do We See Them?
How Do We Know They are Black Holes?
63
64. La velocidad de escape de la luz desde una
estrella depende tanto de la masa de la
estrella como de su radio.
La gravedad es una fuerza básica de la
naturaleza creada entre objetos que tienen
masa.
La velocidad de la luz, 300.000 Km./s, es la
“velocidad límite” universal
Las leyes del movimiento y de la gravitación se
utilizan para estudiar los efectos de los
agujeros negros sobre su entorno inmediato.
64
66. Black Holes Come in Two Sizes:
“Stellar Mass”
– 5 - 20 times the mass of the sun
– Result from supernova explosion of massive star
Massive (“Active Galaxies”)
– Millions times the mass of the sun
– Lie in centers of galaxies
66
69. • Remolinos de materia alrededor de
un agujero negro central.
• El gas próximo a un agujero negro
hace que se caliente a temperaturas
de ultravioleta y rayos X.
• Esto calienta el gas que lo rodea,
por lo que se muestra rojo en el
óptico.
69
71. Radio tells us about motions of particles in magnetic fields.
Using many radio dishes allows us to see small details
A portion of the Very Large Array, Socorro NM 71
72. Many black holes emit jets.
Jet likely composed of electrons and positrons.
Magnetic fields surrounding black hole expel material and
form the jet.
Interaction of jet material with magnetic field gives rise to
Radio emission.
72
77. X-rays reveal high temperatures and highly energetic phenomena.
Chandra X-ray Observatory
77
78. • Los agujeros negros capturan el material estelar cercano.
• Como el gas se mantiene cerca del agujero negro, lo calienta.
• El gas se calienta hasta temperaturas de millones de grados.
• El gas calentado a estas temperaturas deja escapar tremendas
cantidades de energía en forma de rayos X.
78
80. La materia en el disco gana energía cuando cae en el interior
del agujero negro.
La energía gravitacional se convierte en energía cinética.
– La energía cinética se transforma en calor y rayos X.
Hasta el 42% de la masa de la materia que cae se convierte
en energía.
Esto es, 1038 erg/s (100.000 veces más que el Sol)
80
81. What force causes material to be pulled toward the black hole ?
Gravity
Why is there a disk surrounding the black hole ?
Gas flows according to rotational motion from orbit of star
What happens to the mass of the black hole as it takes in
material from the companion ?
Black hole mass increases
How much material is it ? (a lot or a little ?)
A little (compared to mass of Companion Star)
What makes it possible for us to “see” the black hole ?
The disk emits X-rays
81
82. We expect everything in the Universe to rotate. Nonrotating
black holes are different from rotating ones.
Non-rotating black hole Rotating black hole
82
83. • Detection of a period in GRO J1655-40 due to
precession of the disk.
• Este periodo de precesión concuerda con lo esperado
para el arrastre de imagen de espacio-tiempo alrededor
de un agujero negro.
83
84. Cen A is known to be a peculiar galaxy with strong radio emission.
Optical image of Cen A
Chandra image of Cen A
But it is also a strong X-ray emitter, and has an X-ray jet.
84
85. • Black Holes with masses a few hundred to a few thousand
times the mass of the sun have been found outside the
central regions of a number of galaxies.
Optical and X-ray images of NGC 253
• Often found in Starburst galaxies.
• May be precursors to Active Galaxies.
85
86. Gamma Rays reveal the highest energy phenomena
Jets in active galaxies emit gamma-rays as well as radio.
Compton Gamma-Ray Observatory
86
87. Active Galaxies
Seyferts - viewing the jet sideways
Gamma rays are extension of thermal emission seen
in X-ray.
Blazars - looking down the jet
Highly variable gamma-ray luminosity
Gamma rays arise from lower energy photons gaining
energy from fast moving electrons in the jet.
87
92. Middle mass black holes
http://antwrp.gsfc.nasa.gov/apod/ap000914.html
92
93. • Los agujeros negros son a
menudo parte de un sistema de
estrellas binarias, en los que
dos estrellas giran una en torno
a la otra.
• Lo que vemos desde la Tierra
es una estrella visible que orbita
alrededor de lo que parece ser
la nada.
• Podemos deducir la masa del
agujero negro por la órbita de la
estrella visible que gira en torno
a él.
• Cuanto mayor es un agujero
negro, mayor es el empuje
gravitacional y mayor el efecto
sobre la estrella visible.
93
94. • Gravitational effect of Black
Hole on Companion star is
measured through the orbital
velocity of the Companion.
• What’s the connection ?
Orbital Velocity of Optical Companion Star in Cygnus X-1
3 3 3
m bh sin i vc P
2
(m c m bh ) 2 G
94
95. Stars near the center of a galaxy have varied speeds and directions of their orbital
motions - that is termed their “velocity dispersion.”
The cause of all this chaotic behavior appears to be a super-massive black hole that
lurks at the galactic center!
95
96. • Hubble Space Telescope can precisely measure the speed of gas and
stars around a black hole.
• It discovered a correlation between a black hole's mass and the average
speed of the stars in the galaxy's central bulge.
• The faster the stars are moving, the larger the black hole.
96
97. Imagine the Universe – “An Introduction to Black Holes”
http://imagine.gsfc.nasa.gov/docs/science/know_l1/black_holes.html
Amazing Space – “ The Truth About Black Holes”
http://amazing-space.stsci.edu/
Hubble Space Telescope Institute
http://hubble.stsci.edu/news_.and._views/cat.cgi.black_holes
Adler Planertarium - “Astronomy Connections - Gravity and
Black Holes”
http://www.adlerplanetarium.org/education/ac/gravity/index.html
Gravity Probe B
http://einstein.stanford.edu/
97
98. Constellation X-ray Observatory
http://constellation.gsfc.nasa.gov/ga/black_holes.html#what
Imagine the Universe: “You be the Astrophysicist” - Determine
the Mass of Cygnus X-1
http://imagine.gsfc.nasa.gov/YBA/cyg-X1-mass/intro.html
Imagine the Universe – “Taking a Black Hole for a Spin”
http://imagine.gsfc.nasa.gov/docs/features/movies/spinning_blackhole.html
Starchild – “Black Holes”
http://starchild.gsfc.nasa.gov/docs/StarChild/universe_level2/black_holes.h
tml
“Virtual Trips to Black Holes and Neutron Stars”
http://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html
98
99. Universe! – “Voyage to a Black Hole”
http://cfa-www.harvard.edu/seuforum/explore/blackhole/blackhole.htm
Falling Into a Black Hole
http://casa.colorado.edu/~ajsh/schw.shtml
Massive Black Hole Information Center
http://arise.jpl.nasa.gov/arise/infocenter/info-center.html
Everything you need to know about Black Holes
http://www.astro.keele.ac.uk/workx/blackholes/index3.html
Black Holes in a Different Light (this presentation)
http://imagine.gsfc.nasa.gov/docs/teachers/blackholes/blackholes.html
99