Waves transfer energy from one place to another through repeated vibrations. There are two main types of waves - transverse waves where the vibrations are perpendicular to the direction of travel, and longitudinal waves where the vibrations are parallel. Waves can be described using terms like amplitude, wavelength, frequency, period and speed. Waves reflect when they hit obstacles and refract when changing speed in different mediums. The electromagnetic spectrum ranges from gamma rays to radio waves, with visible light in between. All electromagnetic waves travel at the speed of light and have wave-like properties.
WAVES
INTRODUCTION
A wave is a period disturbance which transfers energy from one place to another.
There are two types of waves:
1. Mechanical waves
2. Electromagnetic waves
WAVES
INTRODUCTION
A wave is a period disturbance which transfers energy from one place to another.
There are two types of waves:
1. Mechanical waves
2. Electromagnetic waves
An overview of Doppler Effect in Ultrasonography - the medical imaging of the body using Ultrasound.
Includes Colour Doppler, Power Doppler, Spectral Doppler, Continuous Wave Doppler, Pulsed Wave Doppler, and comparisons with other Radiographic imaging modalities.
An overview of Doppler Effect in Ultrasonography - the medical imaging of the body using Ultrasound.
Includes Colour Doppler, Power Doppler, Spectral Doppler, Continuous Wave Doppler, Pulsed Wave Doppler, and comparisons with other Radiographic imaging modalities.
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
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:
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Welocme to ViralQR, your best QR code generator.ViralQR
Welcome to ViralQR, your best QR code generator available on the market!
At ViralQR, we design static and dynamic QR codes. Our mission is to make business operations easier and customer engagement more powerful through the use of QR technology. Be it a small-scale business or a huge enterprise, our easy-to-use platform provides multiple choices that can be tailored according to your company's branding and marketing strategies.
Our Vision
We are here to make the process of creating QR codes easy and smooth, thus enhancing customer interaction and making business more fluid. We very strongly believe in the ability of QR codes to change the world for businesses in their interaction with customers and are set on making that technology accessible and usable far and wide.
Our Achievements
Ever since its inception, we have successfully served many clients by offering QR codes in their marketing, service delivery, and collection of feedback across various industries. Our platform has been recognized for its ease of use and amazing features, which helped a business to make QR codes.
Our Services
At ViralQR, here is a comprehensive suite of services that caters to your very needs:
Static QR Codes: Create free static QR codes. These QR codes are able to store significant information such as URLs, vCards, plain text, emails and SMS, Wi-Fi credentials, and Bitcoin addresses.
Dynamic QR codes: These also have all the advanced features but are subscription-based. They can directly link to PDF files, images, micro-landing pages, social accounts, review forms, business pages, and applications. In addition, they can be branded with CTAs, frames, patterns, colors, and logos to enhance your branding.
Pricing and Packages
Additionally, there is a 14-day free offer to ViralQR, which is an exceptional opportunity for new users to take a feel of this platform. One can easily subscribe from there and experience the full dynamic of using QR codes. The subscription plans are not only meant for business; they are priced very flexibly so that literally every business could afford to benefit from our service.
Why choose us?
ViralQR will provide services for marketing, advertising, catering, retail, and the like. The QR codes can be posted on fliers, packaging, merchandise, and banners, as well as to substitute for cash and cards in a restaurant or coffee shop. With QR codes integrated into your business, improve customer engagement and streamline operations.
Comprehensive Analytics
Subscribers of ViralQR receive detailed analytics and tracking tools in light of having a view of the core values of QR code performance. Our analytics dashboard shows aggregate views and unique views, as well as detailed information about each impression, including time, device, browser, and estimated location by city and country.
So, thank you for choosing ViralQR; we have an offer of nothing but the best in terms of QR code services to meet business diversity!
Le nuove frontiere dell'AI nell'RPA con UiPath Autopilot™UiPathCommunity
In questo evento online gratuito, organizzato dalla Community Italiana di UiPath, potrai esplorare le nuove funzionalità di Autopilot, il tool che integra l'Intelligenza Artificiale nei processi di sviluppo e utilizzo delle Automazioni.
📕 Vedremo insieme alcuni esempi dell'utilizzo di Autopilot in diversi tool della Suite UiPath:
Autopilot per Studio Web
Autopilot per Studio
Autopilot per Apps
Clipboard AI
GenAI applicata alla Document Understanding
👨🏫👨💻 Speakers:
Stefano Negro, UiPath MVPx3, RPA Tech Lead @ BSP Consultant
Flavio Martinelli, UiPath MVP 2023, Technical Account Manager @UiPath
Andrei Tasca, RPA Solutions Team Lead @NTT Data
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
2. Waves
• Waves are repeated to-and-fro vibrations that
transfer energy away from an energy source
3. Describing wave motion
Term
Description
SI units
Amplitude, A
The maximum displacement of the rope
from the rest position
Metre (m)
Wavelength, λ The shortest distance between 2 successive
crests or troughs
Metre (m)
Frequency, f
The number of complete waves produced
per second
Hertz (Hz)
Period, T
The time taken to produce one complete
wave
Second (s)
Wave speed, v The distance travelled by a wave in 1 second Second (s)
5. Types of Waves
• Transverse waves
o The vibration of the particles in the medium is perpendicular to the
direction in which the wave travels
o Eg. water waves, rope waves, all types of electromagnetic waves
including light waves, microwaves, X-rays, gamma rays
o The highest point reached by a vibrating particle in a transverse wave is
called crest or peak while the lowest point is called trough
• Longitudinal waves
o The vibration of the particles in the medium is parallel to the direction in
which the wave travels
o Eg. sound waves
o The section in which the vibrating particles in a longitudinal wave are
closest together is called compression while the section in which the
vibrating particles are furthest apart is called rarefaction
7. Wavefronts
• Any line or surface over which all the vibrating
particles are in the same phase
• Particles in the same phase have the same speed
and are at equal distances from their source
• In transverse waves, wavefronts are normally lines
joining all the peaks at equal distance from their
source
• The distance between successive wavefronts
equals a wavelength
• The direction of travel of a wave is always
perpendicular to its wavefronts as indicated by lines
drawn perpendicular to the wavefronts.
9. Wave Equation
• Velocity of wave, v = fλ
Example: The speed of light in vacuum is 3 x 108 m/s
Calculate the frequency of orange light, given that its
wavelength in vacuum is 6 x 107 m.
3 x 108 = f x 6 x 10-7
f = (3 x 108)/(6 x 10-7) = 5 x 1014 Hz
10. Ripple Tank
• The properties of waves in general and water
waves in particular are most easily studied in a
ripple tank
11. Reflection of waves
• Waves are reflected when an obstacle is placed in
their paths
• All reflected waves obey the law of reflection which
states
o The angle of reflection equals the angle of incidence
o The incident wave, the reflected wave, and the normal all lie on the same
plane
12. Properties of reflected
waves
• The reflected wave the same wavelength,
frequency, and speed as the incident wave
• The velocities of the reflected and incident waves
are different because they travel in different
directions
• The angle of reflection equal to the angle of
incidence
13. Refraction of waves
• Waves are refracted when their speeds are changed
• The speed of a wave is changed when the wave moves
from a dense medium into a less dense medium or from
deep water to shallower water
• If the incident wave is travelling along the normal, it will
continue to travel along the normal after entering water
of a different depth
• In all other cases, refraction produces a change in wave
direction
• On entering shallower water, the wave direction bends
towards the normal.
• On entering deeper water, the wave direction bends
away from the normal
15. Refraction of waves
Properties
Shallower to deeper
water
Deeper to shallower
water
Wavelength
Increases
Decreases
Frequency
Unchanged
Unchanged
Speed
Increases
Decreases
Velocity
Increases
Decreases
Direction of travel
Bends away from normal Bends towards normal
17. Sound
• Production of sound waves by vibrating
sources: sound is produced by vibrating
sources (eg tuning fork) placed in a medium
(solid, liquid, gas)
• Nature of sound waves
o It is a form of energy that can be transferred from one point to
another
o It is an example of longitudinal waves consisting of compressions
and rarefactions
o Compressions are regions where air pressure is slightly higher than
he surrounding air pressure
o Rarefactions are regions where air pressure is slightly lower than
the surrounding air pressure
20. Transmission of sound in
a medium
• Sound waves require a medium for transmission
• Sound waves cannot travel through a vacuum
Vacuum jar
21. Speed of sound in solid,
liquid, gas
Medim
Speed in m/s
Air (gas)
300
Water (liquid)
1500
Iron (solid)
5000
Speed of sound changes with changes in temperature or humidity
Change in
Explanation
Temperature
Sound travels faster when
temperature rises
Humidity
Sound travels faster when humidity
increases
Pressure
A change in pressure does not affect
speed of sound
22. Experiments to determine
speed of sound in air
• Pistol method
o Observer A and B are positioned at a distance s apart and with a
measuring tape, measure and record s. (must be more than 1km)
o A fires a starting pistol
o B starts the stopwatch on seeing the flash of the pistol and stops
the stopwatch when he hears the sound
o The time t, is recorded
o The speed of sound v can be calculated by
• Speed = distance / time
• For better accuracy, the experiment should be repeated and the
average speed of sound can be calculated.
• The experiment can be repeated by interchanging the positions of
A and B so as to minimise the effect of the wind direction.
23. Experiments to determine
speed of sound in air
• Echo method
o Observer A and B are positioned at a distance s from the wall
and with a measuring tape, measure and record s
o A claps two wooden blocks.
o On hearing the echo (reflected from the wall), he repeats the
clap
o B starts the stopwatch and also starts counting from zero till the
nth clap.
o The time interval tn is recorded
o The average time between successive claps is t = t n/n
o The speed of sound v can be calculated by
• speed = distance/time
24. Reflection of sound
• An echo is a reflection of sound
• Reverberation is the effect of a prolonged sound
due to the merging of many echoes
• Echoes are used in determining the depth of sea
and locations of shoals of fish
26. Properties of
electromagnetic waves
• They are generated by accelerating charged
particles
• They travel at 3 x 108 m/s in vacuum
• They obey the laws of reflection and refraction
• They show wave properties such as diffraction and
interference
• They obey the equation v = fλ
• They are progressive transverse waves carrying
energy in the form of oscillating electrical and
magnetic fields vibrating at right angles to one
another and to the direction of travel of the waves
27. Radiation Wavelength Sources
/m
Detectors
Uses
Gamma rays
10-15 – 10-11
Cosmic rays radioactive
substances, nuclear
changes
G M tubes with
counters,
bubble/cloud
chambers
Checking welds, killing
cancer cells in radiology,
photography
X-rays
10-13 – 10-8
X-ray tubes: stopping of
fast-moving electrons
by a heavy metal target
Photographic film,
fluorescent screen
X-ray photography,
analysis of crystal structure
Ultraviolet
10-8 – 10-7
Mercury vapor
lamps, sun, spark
discharges
Fluorescent
screens/dyes
Forgery detection, sun
lamps
Visible
light
10-7
Hot bodies, lasers,
fluorescent screens,
sun
Photographic
film,
photodiodes
Chemical spectral
analysis, fibre optics
Infra-red
10-7 – 10-3
Warm bodies, sun,
fires, furnaces
Blackened
thermometers,
thermocouples
TV remote control,
radiant heaters
VHF and
UHF (TV)
waves
10-4 – 10-1
TV transmitters
Aerials and TV
sets
Communications,
entertainment
Radio
waves
10-3 – 103
Radio transmitters
Aerials and
radio sets
Radio, telescope, radar,
communications