Laser Communication is an emerging area of wireless communication .It refers to transmission of modulated visible and IR beams through atmosphere.Its data rate is 30 times higher than Radio waves.
Laser communications offer a viable alternative to RF communications for inter satellite links and other applications where high-performance links are a necessity.
Laser Communication is an emerging area of wireless communication .It refers to transmission of modulated visible and IR beams through atmosphere.Its data rate is 30 times higher than Radio waves.
Laser communications offer a viable alternative to RF communications for inter satellite links and other applications where high-performance links are a necessity.
Visible light communication (vlc) systemsCKSunith1
The attached narrated power point presentation attempts to explain the working principle, block diagram, layer model, standards, advantages, disadvantages and modulation schemes as applicable to Visible Light Communication Systems (VLC). The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Free Space Optics (FSO) communications, also called Free Space Photonics (FSP) or Optical Wireless, refers to the transmission of modulated visible or infrared (IR) beams through the atmosphere to obtain optical communications. Like fiber, Free Space Optics (FSO) uses lasers to transmit data, but instead of enclosing the data stream in a glass fiber, it is transmitted through the air. Free Space Optics (FSO) works on the same basic principle as Infrared television remote controls, wireless keyboards
Free-space optical communication is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking. It is a technology that can be installed license-free worldwide and can be installed in less than a day. A technology that offers a fast, high ROI. There is no Frequency License Required in it.
This narrated power point presentation attempts to explain the various dispersion mechanisms that are observed in optical fibers. Some fundamental terms and concepts are also discussed. The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Optical Wireless Communications - from the space to the chip.Joaquin Perez
A short introduction to the applications of the OWC in to the short-range to the deep-space applications. Form visible light communications to wearables, OWC is a way to reuse our natural space of communications the free space and the light.
Seminar presented at Universitat Politecnica de Valencia, Spain during the OQCG regular seminars' series, March 2014. by Dr Joaquin Perez
Visible light communication (vlc) systemsCKSunith1
The attached narrated power point presentation attempts to explain the working principle, block diagram, layer model, standards, advantages, disadvantages and modulation schemes as applicable to Visible Light Communication Systems (VLC). The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Free Space Optics (FSO) communications, also called Free Space Photonics (FSP) or Optical Wireless, refers to the transmission of modulated visible or infrared (IR) beams through the atmosphere to obtain optical communications. Like fiber, Free Space Optics (FSO) uses lasers to transmit data, but instead of enclosing the data stream in a glass fiber, it is transmitted through the air. Free Space Optics (FSO) works on the same basic principle as Infrared television remote controls, wireless keyboards
Free-space optical communication is an optical communication technology that uses light propagating in free space to wirelessly transmit data for telecommunications or computer networking. It is a technology that can be installed license-free worldwide and can be installed in less than a day. A technology that offers a fast, high ROI. There is no Frequency License Required in it.
This narrated power point presentation attempts to explain the various dispersion mechanisms that are observed in optical fibers. Some fundamental terms and concepts are also discussed. The material will be useful for KTU final year B Tech students who prepare for the subject EC 405, Optical Communications.
Optical Wireless Communications - from the space to the chip.Joaquin Perez
A short introduction to the applications of the OWC in to the short-range to the deep-space applications. Form visible light communications to wearables, OWC is a way to reuse our natural space of communications the free space and the light.
Seminar presented at Universitat Politecnica de Valencia, Spain during the OQCG regular seminars' series, March 2014. by Dr Joaquin Perez
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
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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.
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Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
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.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
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/
Search and Society: Reimagining Information Access for Radical FuturesBhaskar Mitra
The field of Information retrieval (IR) is currently undergoing a transformative shift, at least partly due to the emerging applications of generative AI to information access. In this talk, we will deliberate on the sociotechnical implications of generative AI for information access. We will argue that there is both a critical necessity and an exciting opportunity for the IR community to re-center our research agendas on societal needs while dismantling the artificial separation between the work on fairness, accountability, transparency, and ethics in IR and the rest of IR research. Instead of adopting a reactionary strategy of trying to mitigate potential social harms from emerging technologies, the community should aim to proactively set the research agenda for the kinds of systems we should build inspired by diverse explicitly stated sociotechnical imaginaries. The sociotechnical imaginaries that underpin the design and development of information access technologies needs to be explicitly articulated, and we need to develop theories of change in context of these diverse perspectives. Our guiding future imaginaries must be informed by other academic fields, such as democratic theory and critical theory, and should be co-developed with social science scholars, legal scholars, civil rights and social justice activists, and artists, among others.
Search and Society: Reimagining Information Access for Radical Futures
Laser communication
1. RAHUL DOGRA
ECE-18/13
Communication is
connecting two distant
points to transmit and
receive data accurately.
Lasers are used in LC.PRE Known :
LASERs(Light Amplification
through Stimulated
Emission of Radiations)
Basic Communication
terminology
2. Introduction
• Laser communications systems are wireless or optical connections.
• Use Laser Beams to exchange information between two locations
• No fibers compulsion, a wireless technology
• Communication over long distances, such as between planets
• Laser Communication Terminals (LCTs) transmit a laser beam and are
capable of receiving laser beams.
6. Laser Transmitter
• The Transmitter involves a signal
processing circuit, and a laser.
• A laser diode is used to create the laser
signal (Typical material Nd:YAG).
• Gas Lasers may also be used.
10. Mounting Systems
• Mounts and stands need only be as accurate as beam divergence
• Since quarter turns (even eighth turns) are possible in mounting
threads, this is more than accurate enough
• Higher thread pitches allow shorter mounts which may be more stable
(against wind, vibration, wires)
• Mounts should be stable against natural varsities like rain, strong winds
etc.
12. • The system is set up to
send voice data.
• A person's voice is input
into a conditioning
circuit to consume 8 bit
range of ADC
• Once the digital signal is
obtained from the ADC,
the MCU passes the
signal to the UART.
13. • The UART sets a transmit
pin high or low according
to the serial protocol.
• Some conditioning is
applied to this signal as
well in order to ensure
constant current to the
laser.
• On the receiver side, the
signal is read by a photo
transistor and basically the
signal goes through an
opposite sequence to
output a sound instead of
receiving one and using the
DAC will change the digital
signal to an analog one.
14. • Not always possible to lay fiber lines
Satellites
Combat zones
Physically / Economically not practical
Emergencies
• Laser Communication is being incorporated even into fiber optic
networks whenever fiber is not practical.
Why not Fiber Optics?
15. • Bandwidth
• for Laser Communication 100 times greater than for RF.
=>More data travels at one time
• Power
• Laser beam is directed at target, much less transmission power required.
• Also the power loss is less.
• Size / Weight
• LC antenna is much smaller than RF.
• LC does not need Long towers
• Security
• Due to low divergence of laser beam, LC is more secure than RF.
Why not RF?
17. Applications
• Defense and sensitive areas.
• At airports for communication across the
runways.
• GPS through satellites then rf for different
users
• Free-space optical communication
• Space probe are being designed to use
optical rather than radio communication.
• Laser communication has also been
utilised on aircraft and high altitude
platforms.
18. Lunar Atmosphere and Dust Environment Explorer
(LADEE)
• Lunar Laser Communication Demonstration
(LLCD) equipment on LADEE set a space
communication bandwidth record in
October 2013.
• Early tests using a pulsed laser beam to
transmit data over the 385,000 kilometres
(239,000 mi) between the Moon and Earth.
• Passed data at a "record-breaking download
rate of 622 megabits per second (Mbps)“
• Demonstrated an error-free data upload
rate of 20 Mbps from an Earth ground
station to LADEE in Lunar orbit.
19. Advantages
• Ease of deployment
• Can be used to power devices
• License-free long-range operation (in contrast with radio communication)
• High bit rates
• Low bit error rates
• Immunity to electromagnetic interference
• Full duplex operation
• Protocol transparency
• Increased security when working with narrow beam(s)[citation needed]
• No Fresnel zone necessary
20. Disadvantages
• For terrestrial applications, the principal limiting factors are:
• Beam dispersion
• Atmospheric absorption
• Rain
• Fog
• Snow
• Interference from background light sources (including the Sun)
• Shadowing
• Pointing stability in wind
• Pollution / smog
21. Conclusion
• With the dramatic increase in the data handling requirements for
satellite communication services, laser
• Inter satellite links offer an attractive alternative to RF with virtually
unlimited potential and an unregulated spectrum.
• The system and component technology necessary for successful inter
satellite link exists today.