The document discusses several key concepts about electricity and circuits:
- Phase changes like melting and boiling absorb energy without changing temperature. This energy is called latent heat and allows substances to change state.
- Electric circuits allow electric current to flow through a conductive loop. Current is the flow of electric charge and is measured in amps. It flows from high to low voltage according to Ohm's Law.
- Circuits can be connected in series, where there is one path, or parallel, where there are multiple paths. This determines how components influence each other. Fuses and circuit breakers protect parallel circuits if too much current flows.
Kohēzijas politikas ES fondu un ārvalstu finanšu palīdzības investīciju progr...Finanšu ministrija
Otrdien, 16. septembrī, Ministru kabinetā (MK) tika izskatīts Finanšu ministrijas (FM) sagatavotais informatīvais ziņojums par Eiropas Savienības (ES) struktūrfondu un Kohēzijas fonda, Eiropas Ekonomikas zonas (EEZ) finanšu instrumenta, Norvēģijas finanšu instrumenta un Latvijas un Šveices sadarbības programmas apguvi līdz 2014. gada 30. jūnijam. Šādu ziņojumu FM iesniedz MK reizi ceturksnī.
Social media workshop; hoe ontwikkel ik een strategie?Refreshed
Workshop social media bij BBC Fides in Zeewolde. Hoe ontwikkel je een social media strategie? In deze workshop vind je een stappenplan om een social media strategie te ontwikkelen!
Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of computer cpu..it consists of various parts of cpu ..it is basically the internal organ of our computer Hardware is the part that is inside of com
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.
GraphSummit Singapore | The Art of the Possible with Graph - Q2 2024Neo4j
Neha Bajwa, Vice President of Product Marketing, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
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.
Unlocking Productivity: Leveraging the Potential of Copilot in Microsoft 365, a presentation by Christoforos Vlachos, Senior Solutions Manager – Modern Workplace, Uni Systems
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…
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.
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
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.
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!
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
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.
Dr. Sean Tan, Head of Data Science, Changi Airport Group
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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
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.
2. • During this odd state of
water there are small
domains within the liquid
that still have the very
open, ordered solid
structure.
• The decrease in density
is caused by these
“melting”.
4. Phase Changes:
• We know the distribution of particle energies
changes with temperature.
• We also know from evaporation that particles
with more energy than can be held will escape.
• So temperature of the liquid reaches an upper
limit and thereafter does not change as a liquid
boils away.
• What about melting?
5. Boiling
• Molecules attain enough
energy to escape liquid.
• Temperature of liquid
does not change while
boiling.
• Energy is still absorbed!
6. • Melting: ordered solid state breaks apart.
• Energy absorbed to melt even though, like boiling,
temperature does not change.
• Energy released when freezing.
Melting and Freezing
7. Energy and Phase Change
• Although temperature does
not change (c*m*ΔT = 0)
heat energy is still
absorbed/released.
• Energy to melt/freeze is
called heat of fusion.
• Energy required to
boil/condense is called heat
of vaporization.
8. Conclusion:
Around Freezing water has unusual thermal expansion
characteristics.
Actually becomes less dense as it gets colder, which is why ice floats.
Phase changes are similar to Evaporation/Condensation.
No temperature change may occur while a phase change is
underway.
All heat energy transferred into (out of) a system during a
phase change is used to change the phase. Process similar to
H = m*c*ΔT, instead H = m*L: heat = mass time latent heat
(fusion/vaporization).
10. Work and the Electric Force
• Work: force taking place
over distance.
– W = F * d
• Imagine two particles of
opposite charge.
– If we separate them have
we done work?
q1 q2
d1
q1 q2
d2
11. Electric Potential Energy
• Unlike gravitational
potential energy, we
have different charges.
• By pushing two of the
same charge (both
positive or both
negative) closer together
we store energy.
12. What is a Volt?
(Measuring Electric Potential Energy)
• A volt is a way of measuring how much
potential energy is present per charge.
– Potential (voltage) = Electric Potential Energy
amount of charge
– A Volt is a Joule per Coulomb
When we think about a 1.5 Volt battery, what is it the
number is telling us?
• Each Coulomb of charge passing through the battery
carries 1.5 Joules of energy.
13. High Voltage
• Voltages between earth and
various objects may be quite
high.
– 5,000 V on a balloon
– 100,000 V on a van de graaf
generator
• Why aren’t these high
voltages dangerous?
– Very few charges involved,
much less than one coulomb
(~10^18 electrons)
– Even if you get shocked the
current is very small.
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5,000 V
14. The Flow of Electric Energy
• Just as heat flows from warm to cold and as
material flows from high to low pressure
electric charges will flow from high potential to
low potential.
• Charges move from one pole of a battery to
another, trying to make the potential difference
(voltage difference) smaller.
15. • A plumbing analogy can be very useful when thinking
about circuits.
– Pressure = voltage
– Flow = current
– Size of pipe = resistance.
16. Electron Flow in a Circuit
• A current carrying wire is not electrically charged
– It’s just a conduit.
– Whenever a charge is pushed on at one end one will leave
at the other end..
– Net charge remains zero.
18. Electric Current
• The electrons which flow through a wire are already
present.
• Electric Potential simply forces them to flow.
• Current is measured in Amperes
– One Amp means One Coulomb of charge passes through a
point on the wire each second. (Coulomb/second)
19. Electron Speed
The speed of an electron through a circuit is quite low;
measured in cm/s
The speed at which the circuit reacts to changes in the
potential, however, is near the speed of light! (This is why
electric appliances will react almost instantaneously to being
switched on/off.)
20. DC and AC
• Direct Current: the current
remains constant over time.
• Alternating Current: the
direction the current flows
reverses.
– Alternating current has the
advantage of easy conversion
of voltages: low voltage to high
and high to low.
– We’ll talk more about this later.
21. Electrical Resistance
• Current in a circuit depends both on Voltage
and on Resistance
– Resistance is sort of like a constriction in a pipe.
– Less water flows through a clogged drain despite
having the same pressure.
• Resistance is measured in Ohms.
22. Resistance
• Electrical resistance depends upon:
– Length
– Type of material
• Copper conducts well, rubber does not
– Temperature
• In general resistance rises with temperature.
• Some materials exhibit zero resistance at very low
temperature.
23. Ohm’s Law
• There is a simple relationship between Voltage,
Current and Resistance in a circuit:
– V = I*R or I = V/R
• The greater the resistance, the smaller the
current.
24. Example Problem
• The bulbs are identical.
• Which bulb will be
brighter.
• How much more current
will flow in the 2nd
circuit?
6 V
12 V
25. Electric Circuits
• The flow of electrons requires a pathway.
• Pathway goes from and returns to pump.
– This is why it is a circuit: it makes a full circle, return
trip.
Experiment time: each group will receive one bulb,
one battery and ONE wire. Find ways to connect
them which light the bulb (there are 4 ways, all very
similar).
26. Circuits
Circuits can have two major forms of
organization:
Series: everything comes one after the other
Parallel: different paths through each device
27. Series Circuits
• Current has a single pathway.
• The current is resisted by all resistances
– In V = I*R, R = R1 + R2 + ...
• Each device experiences a ‘voltage drop’ depending on the
size of its resistance.
28. Experiment: Simple Series
• Two bulbs in series
• What happens if we unscrew one bulb?
12 V
There is only one path for electrons to take.
Unscrew one bulb and you break the road
they were following: both go out.
29. Example Problem
• All 3 bulbs are identical.
• Which will be brighter,
the bulb in the top circuit
or the bulbs in the
bottom circuit?
• Why?
12 V
12 V
30. Experiment: Different Resistance
Bulbs In Series
• Tall Bulb has higher resistance than short.
• Place one tall and one short in a series circuit.
• Now try putting them the other way around.
Does it make a difference?
31. Different Resistances in Series
• One bulb will be brighter than the other.
• It isn’t the one you might expect. Why not?
12 V
100 Ohm 200 Ohm
Total Resistance = 300 Ohm
Current = V/R = 40 mA
Find the voltage drop across each.
We know the resistance of each bulb and
we know the current through both bulbs
must be the same (only one path for the
flow to take).
First bulb: v = I*R = 0.040Amp*100Ohm
4 Volts
Second bulb: V = 0.040Amp*200Ohm
8 Volts
Note: the sum is 12. The total voltage around
a loop must equal the voltage of the supply
(battery in this case).
Result: 200Ohm bulb is brighter.
32. Parallel Circuits
• Each device connects across the same two points.
• Each device experiences the same voltage drop.
• The current in each branch is inversely proportional to the
resistance in the branch.
• As number of branches increases overall resistance
decreases.
33. Exercise: Bulbs in Parallel
• 2 bulbs in parallel
• What happens if we unscrew one bulb?
Only one bulb will go out. In a parallel circuit you have two possible paths
the electron flow may take, so stopping one up does not affect the other.
34. Example Problem
• What happens when a
car headlight burns out?
• Does this imply the lights
are in a series or parallel
circuit?
• Why?
12 V
12 V
Homework problem, so if you’re not sure
ask in class.
35. What fuses do
• Fuses prevent the total
current through a circuit from
exceeding the rating of the
wire.
• If total current through circuit
too high, the fuse will burn
out first.
• Circuit breakers (as you
likely have at home) work
like fuses, but are resettable.
36. Demo
Thin piece of metal used as fuse.
What happens?
If you can get a thin enough piece of steel wool (without cutting yourself on it)
and put enough current through it the ‘fuse’ (steel wool) will melt, protecting
the circuit from having too much current flow for the size of wire used (too
small a wire will heat up and may catch fire).
37. Power
• P = I * V
– P = Power
– I = Current
– V = Voltage
• Power is the amount of energy being used by
that component per second. Higher power
tends to mean hotter or brighter.
12 V
I = 1 Amp
38. Example Problem
If the voltage drop across the bulb is 12 Volts
and the current is 1 Amp, what is the power
drawn?
This is simpler than a question I might ask on a test.
Answer here is 12 Watts.
Test problem more likely to be like 12 Volts and 0.75 Amp or such.
39. Conclude
• Electric Potential is the energy moved per coulomb:
volts
• Ohm’s Law: V(voltage) = I(current)*R(resistance)
• Series Circuits: each component follows one after the
other. If one component burns out no current can flow.
• Parallel Circuits: each component has its own loop
between the same two points. If one component blows,
others continue to function.