This document summarizes the design and implementation of a CubeSat satellite. It describes the key specifications of a CubeSat, including its small size of 10x10x10 cm and weight of less than 1.33kg. The document outlines the main components and subsystems that need to be designed for the CubeSat, including its structure, payload, ground station, attitude control, thermal management, and telemetry software. It provides details on the structural design concepts considered and analysis done to optimize the design within cost constraints.
This document summarizes the development of a 3-axis attitude determination and control system and frictionless test bed for a CubeSat prototype. The objectives were to refine the attitude control system from a previous year and develop a one-dimensional test bed using air bearings. A PID controller was implemented and tested using a simulator and the new test bed, which was constructed using air bearings, a CO2 tank, and a leveled glass plate to allow low-friction translation and rotation of the CubeSat prototype. Data on position, acceleration, and magnetic flux over time was collected during testing.
Senior Design - Europa Mission ProposalMatt Bergman
This proposal outlines a mission to map Europa's interior by placing seismometers on its surface. An orbiter carrying 8 solar-powered landers would launch on a Falcon Heavy in 2020. It would use Venus-Earth gravity assists to arrive at Europa in 2026, then follow the "Banzai Pipeline" tour of Jovian moons. The landers would be placed in a Legendre-Gauss-Lobatto distribution and collect seismic and imaging data for 90 days. The orbiter would relay data to Earth and transport the landers to their locations using a full-sun polar orbit. An analysis of requirements and design trades was conducted to develop a compliant mission within constraints.
The document discusses the management of small secondary payloads, called CubeSats, on launch vehicles through the use of Poly Pico Orbital Deployers (PPODs). It provides the history of small satellite missions and challenges in managing auxiliary payloads. It describes studies conducted on integrating PPODs and outlines the PPOD design concept. It discusses opportunities for flying PPODs on upcoming missions and how risks to the primary payload will be analyzed and mitigated in order to manage PPODs as auxiliary payloads.
Louise Anderson's presentation at the October 2014 INCOSE Colorado Front Range Chapter Meeting, held at the Laboratory for Atmospheric and Space Physics (LASP), University of Colorado Boulder.
Louise is the Systems Engineering Product Owner (Inventory & Production) at DigitalGlobe; Lead for the INCOSE Space Systems Working Group (SSWG) CubeSat Challenge Team
This presentation provides an overview of small satellites, including microsatellites, nanosatellites, and picosatellites. It discusses the history and increasing use of small satellites worldwide. Key points include:
- Small satellites are less than 100kg and have smaller electronic components, making them more cost-effective for certain space missions.
- India has launched several small satellites in recent years including Jugnu in 2011, the first Indian nanosatellite developed by IIT Kanpur.
- Small satellites have applications in areas like weather measurement, communication, and earth observation and can provide efficient access to space for educational institutions and corporations.
- Advantages of small satellites include lower cost, easier launch
Micro air vehicles (MAVs) are small, lightweight, autonomous unmanned aerial vehicles that can fit in a backpack. MAVs are small enough to fit in the hand and can transmit pictures back to a portable base station over a range of several kilometers. They have a projected airspeed below most radar detection and can operate within 600 meters of the launch point. MAVs use electric motors powered by batteries and rely on sensors and flight control for stabilization. They communicate with a ground station using Ka-band frequencies. Potential applications of MAVs include disaster management, commercial uses like photography, and defense/security purposes such as surveillance and explosive detection.
This document summarizes the design and implementation of a CubeSat satellite. It describes the key specifications of a CubeSat, including its small size of 10x10x10 cm and weight of less than 1.33kg. The document outlines the main components and subsystems that need to be designed for the CubeSat, including its structure, payload, ground station, attitude control, thermal management, and telemetry software. It provides details on the structural design concepts considered and analysis done to optimize the design within cost constraints.
This document summarizes the development of a 3-axis attitude determination and control system and frictionless test bed for a CubeSat prototype. The objectives were to refine the attitude control system from a previous year and develop a one-dimensional test bed using air bearings. A PID controller was implemented and tested using a simulator and the new test bed, which was constructed using air bearings, a CO2 tank, and a leveled glass plate to allow low-friction translation and rotation of the CubeSat prototype. Data on position, acceleration, and magnetic flux over time was collected during testing.
Senior Design - Europa Mission ProposalMatt Bergman
This proposal outlines a mission to map Europa's interior by placing seismometers on its surface. An orbiter carrying 8 solar-powered landers would launch on a Falcon Heavy in 2020. It would use Venus-Earth gravity assists to arrive at Europa in 2026, then follow the "Banzai Pipeline" tour of Jovian moons. The landers would be placed in a Legendre-Gauss-Lobatto distribution and collect seismic and imaging data for 90 days. The orbiter would relay data to Earth and transport the landers to their locations using a full-sun polar orbit. An analysis of requirements and design trades was conducted to develop a compliant mission within constraints.
The document discusses the management of small secondary payloads, called CubeSats, on launch vehicles through the use of Poly Pico Orbital Deployers (PPODs). It provides the history of small satellite missions and challenges in managing auxiliary payloads. It describes studies conducted on integrating PPODs and outlines the PPOD design concept. It discusses opportunities for flying PPODs on upcoming missions and how risks to the primary payload will be analyzed and mitigated in order to manage PPODs as auxiliary payloads.
Louise Anderson's presentation at the October 2014 INCOSE Colorado Front Range Chapter Meeting, held at the Laboratory for Atmospheric and Space Physics (LASP), University of Colorado Boulder.
Louise is the Systems Engineering Product Owner (Inventory & Production) at DigitalGlobe; Lead for the INCOSE Space Systems Working Group (SSWG) CubeSat Challenge Team
This presentation provides an overview of small satellites, including microsatellites, nanosatellites, and picosatellites. It discusses the history and increasing use of small satellites worldwide. Key points include:
- Small satellites are less than 100kg and have smaller electronic components, making them more cost-effective for certain space missions.
- India has launched several small satellites in recent years including Jugnu in 2011, the first Indian nanosatellite developed by IIT Kanpur.
- Small satellites have applications in areas like weather measurement, communication, and earth observation and can provide efficient access to space for educational institutions and corporations.
- Advantages of small satellites include lower cost, easier launch
Micro air vehicles (MAVs) are small, lightweight, autonomous unmanned aerial vehicles that can fit in a backpack. MAVs are small enough to fit in the hand and can transmit pictures back to a portable base station over a range of several kilometers. They have a projected airspeed below most radar detection and can operate within 600 meters of the launch point. MAVs use electric motors powered by batteries and rely on sensors and flight control for stabilization. They communicate with a ground station using Ka-band frequencies. Potential applications of MAVs include disaster management, commercial uses like photography, and defense/security purposes such as surveillance and explosive detection.
The document discusses nano unmanned aerial vehicles (UAVs or drones). It defines nano drones as extremely small drones less than 15cm intended for use in urban areas. They are remotely controlled and equipped with cameras and microphones. The document outlines the mechanisms of nano drones, including flapping wing designs. It discusses the advantages of nano drones like low cost and ability to operate in constrained environments, as well as disadvantages such as lack of self-power and risk of spying. Examples of specific nano drone models are provided.
Best ppt on Micro air vehicle with flapping wingsRonak Thakare
This document discusses micro air vehicles (MAVs) with flapping wings. It defines MAVs as unmanned aerial vehicles that are less than 15cm long and weigh less than 4 ounces. They can perform military, commercial, and urban surveillance missions with lightweight designs. MAVs require high resolution sensors, lightweight materials like balsa wood and composites, electric motors and batteries. Flapping wing designs provide more lift than fixed wings. Future work aims to further minimize size and weight while improving flight speed, stability, and battery life. Kelvin's circulation theorem and how flapping wings generate lift through diverting airflow are also summarized.
This document discusses digital hologram image processing techniques. It begins with an introduction to digital holography and why image processing is needed to extract 3D information from digital holograms. Key topics covered include reconstructing digital holograms, focusing and segmentation techniques, and removing unwanted twin images and other artifacts from reconstructions. The document provides an overview of recording digital holograms and sources of error, as well as outlining various image processing approaches that can be applied.
This document discusses research on micro air vehicles (MAVs), which are small unmanned aerial vehicles. It provides an overview of MAV applications such as reconnaissance, surveillance, and chemical/biological sensing. The document outlines key MAV technologies including flight control, propulsion, communication, and guidance/navigation systems. It also discusses aerodynamic challenges at low Reynolds numbers and potential solutions involving MEMS and adaptive wing shaping. Overall, the document presents MAVs as a promising new class of unmanned system that could provide military utility through a variety of potential reconnaissance and sensing missions.
Wi-Vi is a technique developed by researchers at MIT that uses standard Wi-Fi signals to detect motion behind walls. It transmits two Wi-Fi waves that cancel each other when reflecting off static objects but not moving objects. This allows it to determine the number and locations of moving humans in a closed room without any devices on the other side of the wall. It was implemented with off-the-shelf USRP radios and shown to detect humans moving behind walls up to 8 inches thick. Wi-Vi has applications for search and rescue, security, and interactive interfaces and operates within the unlicensed Wi-Fi spectrum.
The document discusses diagnostic procedures used in dentistry. It outlines various tests like thermal tests, electric pulp tests, mobility tests, and radiographs that are used to diagnose dental issues like pulp vitality, periapical lesions, and periodontal disease. The goal of diagnosis is to accurately identify the disease through signs, symptoms, and test results to determine the appropriate treatment.
This document discusses nanobiosensors, including their classification, working principles, history, and applications. Nanobiosensors combine biological components with nano-scale physicochemical detectors. They are classified based on the type of nanomaterial used, such as nanoparticles, nanotubes, or nanowires. Carbon nanotube-based biosensors that function as field-effect transistors are described. The document also reviews recent developments in electrochemical, fiber-optic, and carbon nanotube biosensors, as well as potential applications in biological and environmental detection.
The document discusses nanosensor technology, specifically cantilever array, nanotube, and nanowire sensors. It describes how each type of nanosensor works at the molecular level to detect various targets. Examples of applications mentioned include using cantilever arrays to detect diabetes and cancer biomarkers, nanotubes to detect molecules in liquids, and nanowires to detect single viruses or proteins. The document concludes by outlining some future challenges for improving nanosensor sensitivity and design.
This document discusses nanosensors, including their definition, types, and applications. It describes four main types of nanosensors: optical nanosensors, bio-nanosensors, chemical nanosensors, and physical nanosensors. Specific examples are given for each type, such as proximity sensors for optical nanosensors. Applications discussed include PEPPLES for intracellular sensing, a twin-action nanosensor that responds to both metal ions and temperature, and a multimodal nanosensor capable of detecting multiple electromagnetic characteristics.
Wi-VI is a technology developed by researchers at MIT that uses Wi-Fi signals to track moving objects behind walls. It uses two transmitting antennas that emit inverse signals and a single receiver. Reflections from static objects cancel out, while reflections from moving objects like people are detected. As a person moves, changes in the reflected signal's time of arrival allow their location to be calculated. Potential applications include incorporating it into smartphones for through-wall motion sensing and monitoring situations in places like hospitals. It provides a basic perspective on movement with relatively low resolution compared to cameras but can still trace simple gestures.
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.
Wi-Vi is a device developed at MIT that uses low-power Wi-Fi signals to detect and track moving objects behind walls. It operates on the principles of radar and sonar by transmitting Wi-Fi signals that reflect off objects and return to antennas. The difference in arrival times of the reflected signals at the receiver allows the device to locate and monitor movements through walls. Potential applications of this low-cost, low-power technology include use in smartphones, hospitals, malls, and the military. Further improvements could enhance Wi-Vi's capabilities for virtual reality and defense purposes.
The document discusses the design and development of quadcopter unmanned aerial vehicles (UAVs). It describes the prototypes created, including improvements made to reduce weight and increase lift. Sensors and controllers are discussed, including sensors for position, proximity, and navigation. The final prototype achieved stable hovering with a weight of 43 grams and incorporated an inertial measurement unit, ultrasonic sensors, GPS, and radio frequency transmission for control and data transmission.
The document discusses satellite communications, including the basic components and orbits of communication satellites, how they are used to transmit signals, and some of their applications such as television, radio, and mobile phones. Key orbits discussed include LEO, MEO, and GEO orbits, and the advantages and disadvantages of each for communication purposes. The document also covers frequency allocation and some of the challenges of using satellites for communication.
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.
Internet of Things (IoT) - We Are at the Tip of An IcebergDr. Mazlan Abbas
You are likely benefitting from The Internet of Things (IoT) today, whether or not you’re familiar with the term. If your phone automatically connects to your car radio, or if you have a smartwatch counting your steps, congratulations! You have adopted one small piece of a very large IoT pie, even if you haven't adopted the name yet.
IoT may sound like a business buzzword, but in reality, it’s a real technological revolution that will impact everything we do. It's the next IT Tsunami of new possibility that is destined to change the face of technology, as we know it. IoT is the interconnectivity between things using wireless communication technology (each with their own unique identifiers) to connect objects, locations, animals, or people to the Internet, thus allowing for the direct transmission of and seamless sharing of data.
IoT represents a massive wave of technical innovation. Highly valuable companies will be built and new ecosystems will emerge from bridging the offline world with the online into one gigantic new network. Our limited understanding of the possibilities hinders our ability to see future applications for any new technology. Mainstream adoption of desktop computers and the Internet didn’t take hold until they became affordable and usable. When that occurred, fantastic and creative new innovation ensued. We are on the cusp of that tipping point with the Internet of Things.
IoT matters because it will create new industries, new companies, new jobs, and new economic growth. It will transform existing segments of our economy: retail, farming, industrial, logistics, cities, and the environment. It will turn your smartphone into the command center for the both digital and physical objects in your life. You will live and work smarter, not harder – and what we are seeing now is only the tip of the iceberg.
This document summarizes a presentation about satellite communication. It discusses the basic concept of a communication satellite, how satellites are used as relay stations to transmit signals between Earth stations, and the different types of satellite orbits including geostationary, low Earth, and medium Earth orbits. It also covers topics like inter-satellite links, routing between satellites, common modulation techniques, and recent developments in satellite communication technology.
This document discusses Li-Fi technology, which uses LED light bulbs to transmit data by varying the intensity of light faster than what the human eye can detect. Li-Fi was pioneered in the 1990s and demonstrated by Harald Haas in 2011. It provides several advantages over Wi-Fi such as higher speed potential and no interference with radio frequencies. Li-Fi works by encoding binary data in the on-off states of an LED and can achieve speeds of over 100 Mbps. Potential applications include use in planes, hospitals, and as public internet hotspots through street lamps. However, challenges include light not passing through solid objects and interference from other light sources.
The document discusses nano unmanned aerial vehicles (UAVs or drones). It defines nano drones as extremely small drones less than 15cm intended for use in urban areas. They are remotely controlled and equipped with cameras and microphones. The document outlines the mechanisms of nano drones, including flapping wing designs. It discusses the advantages of nano drones like low cost and ability to operate in constrained environments, as well as disadvantages such as lack of self-power and risk of spying. Examples of specific nano drone models are provided.
Best ppt on Micro air vehicle with flapping wingsRonak Thakare
This document discusses micro air vehicles (MAVs) with flapping wings. It defines MAVs as unmanned aerial vehicles that are less than 15cm long and weigh less than 4 ounces. They can perform military, commercial, and urban surveillance missions with lightweight designs. MAVs require high resolution sensors, lightweight materials like balsa wood and composites, electric motors and batteries. Flapping wing designs provide more lift than fixed wings. Future work aims to further minimize size and weight while improving flight speed, stability, and battery life. Kelvin's circulation theorem and how flapping wings generate lift through diverting airflow are also summarized.
This document discusses digital hologram image processing techniques. It begins with an introduction to digital holography and why image processing is needed to extract 3D information from digital holograms. Key topics covered include reconstructing digital holograms, focusing and segmentation techniques, and removing unwanted twin images and other artifacts from reconstructions. The document provides an overview of recording digital holograms and sources of error, as well as outlining various image processing approaches that can be applied.
This document discusses research on micro air vehicles (MAVs), which are small unmanned aerial vehicles. It provides an overview of MAV applications such as reconnaissance, surveillance, and chemical/biological sensing. The document outlines key MAV technologies including flight control, propulsion, communication, and guidance/navigation systems. It also discusses aerodynamic challenges at low Reynolds numbers and potential solutions involving MEMS and adaptive wing shaping. Overall, the document presents MAVs as a promising new class of unmanned system that could provide military utility through a variety of potential reconnaissance and sensing missions.
Wi-Vi is a technique developed by researchers at MIT that uses standard Wi-Fi signals to detect motion behind walls. It transmits two Wi-Fi waves that cancel each other when reflecting off static objects but not moving objects. This allows it to determine the number and locations of moving humans in a closed room without any devices on the other side of the wall. It was implemented with off-the-shelf USRP radios and shown to detect humans moving behind walls up to 8 inches thick. Wi-Vi has applications for search and rescue, security, and interactive interfaces and operates within the unlicensed Wi-Fi spectrum.
The document discusses diagnostic procedures used in dentistry. It outlines various tests like thermal tests, electric pulp tests, mobility tests, and radiographs that are used to diagnose dental issues like pulp vitality, periapical lesions, and periodontal disease. The goal of diagnosis is to accurately identify the disease through signs, symptoms, and test results to determine the appropriate treatment.
This document discusses nanobiosensors, including their classification, working principles, history, and applications. Nanobiosensors combine biological components with nano-scale physicochemical detectors. They are classified based on the type of nanomaterial used, such as nanoparticles, nanotubes, or nanowires. Carbon nanotube-based biosensors that function as field-effect transistors are described. The document also reviews recent developments in electrochemical, fiber-optic, and carbon nanotube biosensors, as well as potential applications in biological and environmental detection.
The document discusses nanosensor technology, specifically cantilever array, nanotube, and nanowire sensors. It describes how each type of nanosensor works at the molecular level to detect various targets. Examples of applications mentioned include using cantilever arrays to detect diabetes and cancer biomarkers, nanotubes to detect molecules in liquids, and nanowires to detect single viruses or proteins. The document concludes by outlining some future challenges for improving nanosensor sensitivity and design.
This document discusses nanosensors, including their definition, types, and applications. It describes four main types of nanosensors: optical nanosensors, bio-nanosensors, chemical nanosensors, and physical nanosensors. Specific examples are given for each type, such as proximity sensors for optical nanosensors. Applications discussed include PEPPLES for intracellular sensing, a twin-action nanosensor that responds to both metal ions and temperature, and a multimodal nanosensor capable of detecting multiple electromagnetic characteristics.
Wi-VI is a technology developed by researchers at MIT that uses Wi-Fi signals to track moving objects behind walls. It uses two transmitting antennas that emit inverse signals and a single receiver. Reflections from static objects cancel out, while reflections from moving objects like people are detected. As a person moves, changes in the reflected signal's time of arrival allow their location to be calculated. Potential applications include incorporating it into smartphones for through-wall motion sensing and monitoring situations in places like hospitals. It provides a basic perspective on movement with relatively low resolution compared to cameras but can still trace simple gestures.
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.
Wi-Vi is a device developed at MIT that uses low-power Wi-Fi signals to detect and track moving objects behind walls. It operates on the principles of radar and sonar by transmitting Wi-Fi signals that reflect off objects and return to antennas. The difference in arrival times of the reflected signals at the receiver allows the device to locate and monitor movements through walls. Potential applications of this low-cost, low-power technology include use in smartphones, hospitals, malls, and the military. Further improvements could enhance Wi-Vi's capabilities for virtual reality and defense purposes.
The document discusses the design and development of quadcopter unmanned aerial vehicles (UAVs). It describes the prototypes created, including improvements made to reduce weight and increase lift. Sensors and controllers are discussed, including sensors for position, proximity, and navigation. The final prototype achieved stable hovering with a weight of 43 grams and incorporated an inertial measurement unit, ultrasonic sensors, GPS, and radio frequency transmission for control and data transmission.
The document discusses satellite communications, including the basic components and orbits of communication satellites, how they are used to transmit signals, and some of their applications such as television, radio, and mobile phones. Key orbits discussed include LEO, MEO, and GEO orbits, and the advantages and disadvantages of each for communication purposes. The document also covers frequency allocation and some of the challenges of using satellites for communication.
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.
Internet of Things (IoT) - We Are at the Tip of An IcebergDr. Mazlan Abbas
You are likely benefitting from The Internet of Things (IoT) today, whether or not you’re familiar with the term. If your phone automatically connects to your car radio, or if you have a smartwatch counting your steps, congratulations! You have adopted one small piece of a very large IoT pie, even if you haven't adopted the name yet.
IoT may sound like a business buzzword, but in reality, it’s a real technological revolution that will impact everything we do. It's the next IT Tsunami of new possibility that is destined to change the face of technology, as we know it. IoT is the interconnectivity between things using wireless communication technology (each with their own unique identifiers) to connect objects, locations, animals, or people to the Internet, thus allowing for the direct transmission of and seamless sharing of data.
IoT represents a massive wave of technical innovation. Highly valuable companies will be built and new ecosystems will emerge from bridging the offline world with the online into one gigantic new network. Our limited understanding of the possibilities hinders our ability to see future applications for any new technology. Mainstream adoption of desktop computers and the Internet didn’t take hold until they became affordable and usable. When that occurred, fantastic and creative new innovation ensued. We are on the cusp of that tipping point with the Internet of Things.
IoT matters because it will create new industries, new companies, new jobs, and new economic growth. It will transform existing segments of our economy: retail, farming, industrial, logistics, cities, and the environment. It will turn your smartphone into the command center for the both digital and physical objects in your life. You will live and work smarter, not harder – and what we are seeing now is only the tip of the iceberg.
This document summarizes a presentation about satellite communication. It discusses the basic concept of a communication satellite, how satellites are used as relay stations to transmit signals between Earth stations, and the different types of satellite orbits including geostationary, low Earth, and medium Earth orbits. It also covers topics like inter-satellite links, routing between satellites, common modulation techniques, and recent developments in satellite communication technology.
This document discusses Li-Fi technology, which uses LED light bulbs to transmit data by varying the intensity of light faster than what the human eye can detect. Li-Fi was pioneered in the 1990s and demonstrated by Harald Haas in 2011. It provides several advantages over Wi-Fi such as higher speed potential and no interference with radio frequencies. Li-Fi works by encoding binary data in the on-off states of an LED and can achieve speeds of over 100 Mbps. Potential applications include use in planes, hospitals, and as public internet hotspots through street lamps. However, challenges include light not passing through solid objects and interference from other light sources.
2. Introduction
• Introduction to Satellites
• CubeSATs?
o Why Cubesats?
o C.O.T.S.
• How fast is the pace?
• By Whom?
• Interplanetary spacetravel
3. Satellites
Satellite is an artificial object which has been intentionally placed into orbit
-Wikipedia
Should be able to stay in Orbit and with stand the Space
Environment for various purposes
6. CubeSAT=큐브위성
1kg~3kg의 무게
10cmX10cmX10cm
크기 초소형 인공위성을
CubeSAT이라고 부른다.
기존 인공위성:
대형위성 ~5t
소형위성~500kg
개발 및 운영비 연간 7000억원 이상
CubeSAT
• 개발 기간 및 비용이 기존 대형위성에 비해
저렴하다.
• 국가 이외에 우주에서 위성을 운용해야 할
필요성이 있다. 위성의 보다 더 융통성있는
용도
• 기업, 학교, 개인이 자유롭게 우주를 탐사하고
위성을 운용할 수 있도록 하기 위한 기술
7. 기존인공위성 발사절차
CubeSAT 발사절차
Why CubeSATs?
• P-pod을 이용하여 인공위성 규격화
• 다른 인공위성과 같이 발사되는 Piggy
Back
• 궤도를 결정하지 않는다.
• 저궤도(LEO)에서 운용
• 한꺼번에 수십 대의 큐브위성 발사 가능
• 규격을 만족한다면 발사체
회사와 추가작업을 요하지 않음
• 무게~수t or ~수백kg
• 임무에 따라 다양한 형태, 무게, 기능
• 다양한 궤도로의 발사 및 정확한 궤도 로 발사
• 발사체 회사와 인공위성 개발
회사간의 긴밀한 작업을 요함
8. Why CubeSATs?
Consumer Off The Shelf
-상용 제품을 사용함으로써 제작비용의 절감 가능
-보다 융통성 있고 다양한 미션을 가능하게 함
-기존의 인공위성은 개발비용이 비싸기 때문에
우주환경에서의 수명을 연장하기 위해서
Space Qualified
Military Specification 의 값비싼 우주제품 사용
CubeSAT: 임무기간이 짧고 고성능 부품을
사용하지 않기 때문에 상용제품사용가능