This document discusses the physics concepts of interference and diffraction of light waves. It covers Young's double slit experiment and how constructive and destructive interference creates bright and dark bands on the detection screen. Thin film interference is also discussed, where light reflecting off the top and bottom of a thin film can interfere due to a path length difference of half a wavelength or a multiple thereof.
This PowerPoint summarizes double-slit interference by transforming the interference patterns formed by Young's experiment into a right triangle. It is an attempt to clarify the significance of all of its components in order to determine different angles of which bright fringes appear on a screen L distance away from the two slits and eventually to conceptualize the distance between bright fringes by knowing the value of the wavelength of light.
Social Media Marketing: una semplice formula per il successo. Tratto da Marie...Giuseppe Fattori
Marie Ennis-O'Connor, @JBBC, in un post apparso su LinkedIn dal titolo "A Simple Formula For Social Media Marketing Success" illustra i punti per una strategia di social media marketing vincente e fornisce una formula per raggiungere obiettivi a lungo termine. Si propone una versione italiana del post.
This PowerPoint summarizes double-slit interference by transforming the interference patterns formed by Young's experiment into a right triangle. It is an attempt to clarify the significance of all of its components in order to determine different angles of which bright fringes appear on a screen L distance away from the two slits and eventually to conceptualize the distance between bright fringes by knowing the value of the wavelength of light.
Social Media Marketing: una semplice formula per il successo. Tratto da Marie...Giuseppe Fattori
Marie Ennis-O'Connor, @JBBC, in un post apparso su LinkedIn dal titolo "A Simple Formula For Social Media Marketing Success" illustra i punti per una strategia di social media marketing vincente e fornisce una formula per raggiungere obiettivi a lungo termine. Si propone una versione italiana del post.
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All of this illustrated with link prediction over knowledge graphs, but the argument is general.
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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
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👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
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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/
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UI automation Introduction,
UI automation Sample
Desktop automation flow
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Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
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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.
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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.
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Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
7. Demo: Interference for Sound … For example, a pair of speakers, driven in phase, producing a tone of a single f and : But this won’t work for light--can’t get coherent sources l 1 l 2 hmmm… I’m just far enough away that l 2 - l 1 = /2, and I hear no sound at all!
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9. Young’s double slit/rays This is not what is actually seen! Monochromatic light travels through 2 slits onto a screen What pattern emerges on the screen? Bright spots Shadow
10. Young’s double slit/Huygens Recall Huygens’ principle: Every point on a wave front acts as a source of tiny wavelets that move forward. Wave crests in phase = constructive interference Bright and dark spots on screen! • • Constructive = bright Destructive = dark
11. Young’s double slit: Key idea Key for interference is this small extra distance. Consider two rays traveling at an angle : θ • • Bottom ray travels a little further (2 in this case)
12. Young’s double slit: Quantitative Constructive : dsin( ) = m Destructive : dsin( ) = (m+1/2) Consider two rays traveling at an angle Assume screen is very far away (L>>d): θ ≈ ≈ ≈ L where m = 0, 1, 2 m = + 2 Need < d Path length difference = dsin( ) θ
13. Young’s double slit: Quantitative Constructive : dsin( ) = m Destructive : dsin( ) = (m+1/2) Assume screen is very far away (L>>d), angles are small: θ L m = 0, 1, 2 sin( ) tan( ) = y/L y ≈ m L/d y ≈ (m+1/2) L/d dsin( ) θ m = 0 m = +1 m = -1 m = -2 m = +2 y
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16. ACT: Preflight 20.3 1) increases 2) same 3) decreases θ L When this Young’s double slit experiment is placed under water, the separation y between minima and maxima: dsin( ) θ m = 0 m = +1 m = -1 m = -2 m = +2 y
17. Preflight 20.2 In the Young double slit experiment, is it possible to see interference maxima when the distance between slits is smaller than the wavelength of light? 1) Yes 2) No
18. Thin Film Interference n 1 (thin film) n 2 n 0 =1.0 (air) t Get two waves by reflection off two different interfaces: interference! Ray 2 travels approximately 2t further than ray 1. Light is incident normal to a thin film 1 2 Note: angles exaggerated for clarity
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20. Thin Film Summary n 1 (thin film) n 2 n = 1.0 (air) t 1 2 Ray 1: 1 = 0 or ½ Determine , number of extra wavelengths for each ray. If | 2 – 1 | = ½ , 1 ½, 2 ½ …. (m + ½) destructive If | 2 – 1 | = 0, 1, 2, 3 …. (m) constructive Note: this is wavelength in film! ( film = o /n 1 ) + 2 t/ film Ray 2: 2 = 0 or ½ + 0 Reflection Distance This is important!
21. ACT: Thin Film Practice n 1 (thin film) n 2 n = 1.0 (air) t 1 2 Blue light ( 0 = 500 nm ) incident on a glass ( n 1 = 1.5 ) cover slip ( t = 167 nm ) floating on top of water ( n 2 = 1.3 ). A) 1 = 0 B) 1 = ½ C) 1 = 1 What is 1 , the total phase shift for ray 1
22. Thin Film Practice Is the interference constructive or destructive or neither ? n 1 (thin film) n 2 n = 1.0 (air) t 1 2 Blue light ( 0 = 500 nm ) incident on a glass ( n 1 = 1.5 ) cover slip ( t = 167 nm ) floating on top of water ( n 2 = 1.3 ). Example 1 = 2 = Phase shift = | 2 – 1 | =
23. ACT: Thin Film Practice II n 1 (thin film) n 2 n = 1.0 (air) t 1 2 Blue light ( 0 = 500 nm ) incident on a glass ( n 1 = 1.5 ) cover slip ( t = 167 nm ) floating on top of plastic ( n 2 = 1.8 ). Example 1 = 2 = Phase shift = | 2 – 1 | = Is the interference : 1) constructive 2) destructive 3) neither?