Sambit Kumar Mishra presented on Wi-Vi (wireless vision) technology, which uses Wi-Fi signals to capture moving objects behind walls. Wi-Vi relies on a 3 antenna device that transmits identical signals from two antennas, while receiving interference at the third antenna. This allows it to detect human movement by canceling static reflections from walls and furniture. Some challenges are flash effects from walls and tracking complex human motion. Wi-Vi overcomes these by transmitting signals that destructively interfere for static objects but not moving humans. It has advantages like low-cost use of existing Wi-Fi hardware and extending vision capabilities, but limitations include low resolution and short detection ranges.
Wi-Vi or wireless vision is one of the most modern technologies which use wireless fidelity or Wi-Fi as the core principle. Basically, it deals with tracking and manipulation of Wi-Fi signals.
Wi-Vi is used to image the obstacles or solids behind any wall or obstructions. The most important advantage of this is it is completely wireless and no cables or wires are used. Hence it becomes more suitable for usage in mobile devices and other lightweight technologies. Wireless facility also allows it to use in armed force and other security agencies.
As we know that SOANR and RADAR uses the principle of transmission and reflected waves, the Wi-Vi which uses the same principle can be called as an adaptation of those. But it also posses several differences and simpler apparatus. We will see those modifications on the coming pages of the paper.
Wireless vision is a device which operates wirelessly and captures the moving objects behind the wall. WiFi or Wireless Fidelity signals are information carriers between a transmitter and a receiver. Through Wireless Vision, WiFi can be extended to our senses thereby allowing visualizing moving objects through closed doors and walls. These signals are helpful in identifying the people number and their locations while they are in a closed room. It can also help in identifying gestures behind the wall and also it combines gestures to communicate the messages to the wireless receiver without carrying any transmitting device.
Wi-Vi or wireless vision is one of the most modern technologies which use wireless fidelity or Wi-Fi as the core principle. Basically, it deals with tracking and manipulation of Wi-Fi signals.
Wi-Vi is used to image the obstacles or solids behind any wall or obstructions. The most important advantage of this is it is completely wireless and no cables or wires are used. Hence it becomes more suitable for usage in mobile devices and other lightweight technologies. Wireless facility also allows it to use in armed force and other security agencies.
As we know that SOANR and RADAR uses the principle of transmission and reflected waves, the Wi-Vi which uses the same principle can be called as an adaptation of those. But it also posses several differences and simpler apparatus. We will see those modifications on the coming pages of the paper.
Wireless vision is a device which operates wirelessly and captures the moving objects behind the wall. WiFi or Wireless Fidelity signals are information carriers between a transmitter and a receiver. Through Wireless Vision, WiFi can be extended to our senses thereby allowing visualizing moving objects through closed doors and walls. These signals are helpful in identifying the people number and their locations while they are in a closed room. It can also help in identifying gestures behind the wall and also it combines gestures to communicate the messages to the wireless receiver without carrying any transmitting device.
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Researchers have always tried to build a device capable of seeing people through walls. However, previous efforts to develop such a system have involved the use of expensive and bulky radar technology that uses a part of the electromagnetic spectrum only available to the military. Now a system is being developed by Dina Katabi and Fadel Adib, could give all of us the ability to spot people in different rooms using low-cost Wi-Fi technology. The device is low-power, portable and simple enough for anyone to use, to give people the ability to see through walls and closed doors. The system, called “Wi-Vi,” stands for "Wi-Fi" and "vision." is based on a concept similar to radar and sonar imaging. But in contrast to radar and sonar, it transmits a low-power Wi-Fi signal and uses its reflections to track moving humans. It can do so even if the humans are in closed rooms or hiding behind a wall.
Simple definition for Wi-Vi is, as a Wi-Fi signal is transmitted at a wall, a portion of the signal penetrates through it, reflecting off any humans on the other side. However, only a tiny fraction of the signal makes it through to the other room, with the rest being reflected by the wall, or by other objects. Wi-Vi cancels out all these other reflections, and keeps only those from the moving human body. Previous work demonstrated that the subtle reflections of wireless inter signals bouncing off a human could be used to track that person's movements, but those previous experiments either required that a wireless router was already in the room of the person being tracked. Wi-Fi signals and recent advances in MIMO communications are used to build a device that can capture the motion of humans behind a wall and in closed rooms. Law enforcement personnel can use the device to avoid walking into an ambush, and minimize casualties in standoffs and hostage situations. Emergency responders can use it to see through rubble and collapsed structures. Ordinary users can leverage the device for gaming, intrusion detection, privacy-enhanced monitoring of children and elderly, or personal security when stepping into dark alleys and unknown places.
The concept underlying seeing through opaque obstacles is similar to radar and sonar imaging. Specifically, when faced with a non-metallic wall, a fraction of the RF signal would traverse the wall, reflect off objects and humans, and come back imprinted with a signature of what is inside a closed room. By capturing these reflections, we can image objects behind a wall.
Wi-Vi is a see-through-wall technology that is low-bandwidth, low-power, compact, and accessible to non-military entities. Wi-Vi is a see-through-wall device that employs Wi-Fi signals in the 2.4 GHz ISM band.
Seeing through walls using Wireless Vision Technology. Wi-Fi signals are typically information carriers between a transmitter
and a receiver. In this paper, we show that Wi-Fi can also
extend our senses, enabling us to see moving objects through walls and behind closed doors.
This presentation was prepared to support IoT developments for post-graduation students @ IT and Telco Strategic Management. It aims to get an overview on what IoT is, its technology and market innovative applications
This is all about the whole system which is capable the count the entry of threats to a particular secured area.
The final product will be the model of "laser security alarm". The project model consists of mainly two parts-
1. laser security alarm
2. person counter
Laser security alarm will notify that someone has trespassed secured area and analog counter will give the count that how many persons have trespassed that particular area.
This project will give us effective protected area to us. Once this protected area will be breached, the alarm will sound.
We made the laser security in low budget. It had been protect in full security. Laser security systems are a high tech technology that used to be a part of home security only available to the wealthy. It is manually switch dependent sensors and a basic alarm unit.
Laser has several advantages as compared to other light sources like cheap, less manpower; efficient, easily available, design is quite easy.
Imagine touching the armrest of your sofa to change the channel on your television, or pressing against a lightbulb stencil on
the wall to turn on your smart light – these functions and many more like them are now possible thanks to research from a
team from the Computer Science and Artixcial Intelligence Laboratory (CSAIL) at MIT, and the University of Bristol and the
University of Bath in the UK.
WiMAX -- An Emerging Technology for Broadband WMAN
1. Why
1.1. Technology Evolution
1.2. Market Forecast
2. Who
2.1. The Players
2.2. The Subscribers
2.3. The Value Chain and Taiwan’s Position
3. What
3.1. Concept, Architecture and Salient Features
3.2. Terminology
4. The Future Perspective
4.1. Challenge
4.2. Standard and Technical Evolution
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
Want similar presentation ideas? Interact and follow me in Quora : https://www.quora.com/profile/Liju-Thomas-13 or
Connect with me through Facebook : http://www.facebook.com
/lijuthomas24
Researchers have always tried to build a device capable of seeing people through walls. However, previous efforts to develop such a system have involved the use of expensive and bulky radar technology that uses a part of the electromagnetic spectrum only available to the military. Now a system is being developed by Dina Katabi and Fadel Adib, could give all of us the ability to spot people in different rooms using low-cost Wi-Fi technology. The device is low-power, portable and simple enough for anyone to use, to give people the ability to see through walls and closed doors. The system, called “Wi-Vi,” stands for "Wi-Fi" and "vision." is based on a concept similar to radar and sonar imaging. But in contrast to radar and sonar, it transmits a low-power Wi-Fi signal and uses its reflections to track moving humans. It can do so even if the humans are in closed rooms or hiding behind a wall.
Simple definition for Wi-Vi is, as a Wi-Fi signal is transmitted at a wall, a portion of the signal penetrates through it, reflecting off any humans on the other side. However, only a tiny fraction of the signal makes it through to the other room, with the rest being reflected by the wall, or by other objects. Wi-Vi cancels out all these other reflections, and keeps only those from the moving human body. Previous work demonstrated that the subtle reflections of wireless inter signals bouncing off a human could be used to track that person's movements, but those previous experiments either required that a wireless router was already in the room of the person being tracked. Wi-Fi signals and recent advances in MIMO communications are used to build a device that can capture the motion of humans behind a wall and in closed rooms. Law enforcement personnel can use the device to avoid walking into an ambush, and minimize casualties in standoffs and hostage situations. Emergency responders can use it to see through rubble and collapsed structures. Ordinary users can leverage the device for gaming, intrusion detection, privacy-enhanced monitoring of children and elderly, or personal security when stepping into dark alleys and unknown places.
The concept underlying seeing through opaque obstacles is similar to radar and sonar imaging. Specifically, when faced with a non-metallic wall, a fraction of the RF signal would traverse the wall, reflect off objects and humans, and come back imprinted with a signature of what is inside a closed room. By capturing these reflections, we can image objects behind a wall.
Wi-Vi is a see-through-wall technology that is low-bandwidth, low-power, compact, and accessible to non-military entities. Wi-Vi is a see-through-wall device that employs Wi-Fi signals in the 2.4 GHz ISM band.
Seeing through walls using Wireless Vision Technology. Wi-Fi signals are typically information carriers between a transmitter
and a receiver. In this paper, we show that Wi-Fi can also
extend our senses, enabling us to see moving objects through walls and behind closed doors.
This presentation was prepared to support IoT developments for post-graduation students @ IT and Telco Strategic Management. It aims to get an overview on what IoT is, its technology and market innovative applications
This is all about the whole system which is capable the count the entry of threats to a particular secured area.
The final product will be the model of "laser security alarm". The project model consists of mainly two parts-
1. laser security alarm
2. person counter
Laser security alarm will notify that someone has trespassed secured area and analog counter will give the count that how many persons have trespassed that particular area.
This project will give us effective protected area to us. Once this protected area will be breached, the alarm will sound.
We made the laser security in low budget. It had been protect in full security. Laser security systems are a high tech technology that used to be a part of home security only available to the wealthy. It is manually switch dependent sensors and a basic alarm unit.
Laser has several advantages as compared to other light sources like cheap, less manpower; efficient, easily available, design is quite easy.
Imagine touching the armrest of your sofa to change the channel on your television, or pressing against a lightbulb stencil on
the wall to turn on your smart light – these functions and many more like them are now possible thanks to research from a
team from the Computer Science and Artixcial Intelligence Laboratory (CSAIL) at MIT, and the University of Bristol and the
University of Bath in the UK.
WiMAX -- An Emerging Technology for Broadband WMAN
1. Why
1.1. Technology Evolution
1.2. Market Forecast
2. Who
2.1. The Players
2.2. The Subscribers
2.3. The Value Chain and Taiwan’s Position
3. What
3.1. Concept, Architecture and Salient Features
3.2. Terminology
4. The Future Perspective
4.1. Challenge
4.2. Standard and Technical Evolution
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
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Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
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This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
3. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-02
Introduction
The history of WI-VI lies in the campus of MIT.
It was developed by Professor Dina Katabi and her graduate
student Fadel Atib.
Wi-Vi stands for wireless vision.
It captures moving objects behind the wall.
Device uses typically Wi-Fi hardware devices.
Roll no.-201568030
4. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-04
Working
Wi-Vi is essentially a 3 antenna MIMO device: two of the
antenna are used for transmitting and one is used for receiving.
Wi-Vi relies on simple 2.4 GHz Wi-Fi hardware radio.
Simply this can be decoded on handheld device.
Transmitting signals are low power Wi-Fi signals
The two antennas transmit almost identical signals, except
the second antenna’s signal is inverse of the first, resulting in
interference.
Roll no.-201568030
7. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-07
Challenges
The major challenges faced are
1.Flash effect
2.Tracking of human movement
Due to the obstructions and intermediate object it is essential to
generate more sharper output rays.
Roll no.-201568030
8. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-08
Flash Effect:
When you take a device point it at a wall and transmit Wi-Fi signals, a huge
amount of reflection is going to come the wall itself.
Tracking human movement:
When we get reflections from behind the wall, we get reflections from
everything in the environment: the chairs, tables etc. How can we tease out
the person’s reflections from all these reflections? And once we do that, how
can we track a person based on these reflections.
Roll no.-201568030
9. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-09
Method used to overcome the challenges
Transmit two waves that cancel each other when they reflect off
the static object but not the moving object.
Wall is Static Disappears
People tend Detectable
to move
Roll no.-201568030
10. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-10
Transmit
antenna
Receive antenna
x
αx
Eliminating the wall’s Reflection
x
αx
α= -h1/h2
static objects(wall,
furniture, etc) have
constant channels.
Y=h1x+h2(-h1/h2)x=0
people move, therefore their
channel change.
Y=h1’x+h2’(-h1/h2)x ≠ 0
Y=h1x+h2αx
h1
h2
Roll no.-201568030
11. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-11
Tracking Reflection
Reflection from human behaves like it is the
source.
Antenna used to trace a radio frequency
source.
We can find the direction of the signal
movement by steering the beam of antennas.
Roll no.-201568030
12. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-12
Advantages
Wi-Vi can perform through wall imaging without access to any device on
other side of wall.
Wi-Vi employs signals whose wavelengths are 12.5 cm.
Extend human vision beyond the visible electromagnetic range, allowing us
to detect
objects in the dark or in smoke.
Wi-Vi requires only few MHz of bandwidth and operates in the same range
as Wi-Fi.
It operates in ISM band.
Roll no.-201568030
13. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-13
Limitations
Display has very low resolution.
We can’t detect humans behind concrete walls thicker than 8”.
To achieve a narrow beam the human needs to move by about 4
wavelengths(i.e., about 50 cm).
Short range of communication is possible.
Roll no.-201568030
14. NATIONALINSTITUTEOFSCIENCEANDTECHNOLOGY
MCA TECHNICAL PRESENTATION 2017
NAME- SAMBIT KU. MISHRA PAGE-14
Conclusion
Wi-Vi or wireless vision technology is the simplest evolution for
communication.
Rather than RADARS and old measures, it can be afforded simply and cheaply.
Its operation in Ism band makes it easily accessible to public without any
specially built transmitting devices.
Hence in most ways, it makes a sense that Wi-Vi technology is one further step
in the fields of electronics and has the most scope of improvements and
applications an far considered.
Roll no.-201568030