Wearable Health Care System on Textile Platform

ABSTRACT

A comfortable health monitoring system is based on a wearable interface implemented by integrating fabric sensors, advanced signal processing techniques and modern telecommunication systems, on a textile platform. Conducting and piezoresistive materials in form of fiber and yarn are integrated in a garment and used as sensors, connectors and electrode elements. Simultaneous recording of vital signs allows extrapolation of more complex parameters and inter-signal elaboration that contribute to produce alert message and synoptic patient table. The system is designed to be minimally invasive, comfortable and wearable, where the knitted fabric sensors and electrodes are distributed and connected to an electronic portable unit, the acquired signals can then be transmitted to a monitoring system.

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Unified Theory of Electrification in Natural Processes

ABSTRACT

Electrification in natural processes is explained by photochemical reactions initiated by electromagnetic (EM) radiation induced in nanoparticles (NPs) by quantum electrodynamics (QED). The NPs ubiquitous to natural processes produce EM radiation depending on the thermal kT of atoms that at ambient temperature is emitted in the far infrared (FIR). However, EM radiation at vacuum ultraviolet (VUV) levels is required to initiate photochemical reactions, and therefore a mechanism is required to increase the frequency from the FIR to VUV levels – the mechanism called QED induced EM radiation. How the NPs form depends on the specific natural process, but all processes are unified by the VUV radiation induced in NPs by QED. For example, static electricity comprising positive and negative charges is produced from VUV induced in NPs that form in the rubbing of dissimilar solids, atmospheric electricity is produced by hydronium and hydroxyl ions from VUV induced in ice NPs as water vapor freezes at high altitudes, and flow electricity is produced by cations and electrons from VUV induced in NPs that form as clusters in turbulence. Prior applications of QED induced EM radiation were based on the EM confinement of FIR radiation in nanovoids (NVs) – bubbles in liquids and gaps in solids. But difficulties with NVs in this regard led to the conclusion that NPs whether liquid or solid are the most likely EM confinement of FIR radiation in natural processes. Compared to NVs, NPs assure EM confinement of FIR radiation to allow frequency up-conversion to VUV levels. Electrification first occurs at the instant the NPs form as the thermal kT energy of the atoms forming the NP is released in a burst of VUV radiation. Steady VUV is then produced as the NP recovers the thermal kT energy lost in the burst from blackbody (BB) radiation in the ambient surroundings. Either way, FIR radiation from the atoms within the NP is suppressed by QED because the FIR frequency is lower than the EM confinement frequency of NPs. To conserve EM energy, QED requires the kT energy loss corresponding to the suppressed IR radiation to be gained at the EM confinement frequency of the NP – typically in the VUV. In this way, the NPs produce the VUV radiation that by photochemical reaction with chemical species to produce charge in natural processes.

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Haptics

ABSTRACT

‘Haptics’ is a technology that adds the sense of touch to virtual environments. Users are given the illusion that they are touching or manipulating a real physical object.
This seminar discusses the important concepts in haptics, some of the most commonly used haptics systems like ‘Phantom’, ‘Cyberglove’, ‘Novint Falcon’ and such similar devices. Following this, a description about how sensors and actuators are used for tracking the position and movement of the haptic systems, is provided.
The different types of force rendering algorithms are discussed next. The seminar explains the blocks in force rendering. Then a few applications of haptic systems are taken up for discussion.

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AUDIO SPOTLIGHTING

ABSTRACT


Audio spot lighting is a very recent technology that creates focused beams of sound similar to light beams coming out of a flashlight. By ‘shining’ sound to one location, specific listeners can be targeted with sound without others nearby hearing it. It uses a combination of non-linear acoustics and some fancy mathematics. But it is real and is fine to knock the socks of any conventional loud speaker. This acoustic device comprises a speaker that fires inaudible ultrasound pulses with very small wavelength which act in a manner very similar to that of a narrow column. The ultra sound beam acts as an airborne speaker and as the beam moves through the air gradual distortion takes place in a predictable way due to the property of non-linearity of air. This gives rise to audible components that can be accurately predicted and precisely controlled. Joseph Pompei’s Holosonic Research Labs invented the Audio Spotlight that is made of a sound processor, an amplifier and the transducer. The American Technology Corporation developed the Hyper Sonic Sound-based Directed Audio Sound System. Both use ultrasound based solutions to beam sound into a focused beam. Audio spotlight can be either directed at a particular listener or to a point where it is reflected.

The targeted or directed audio technology is going to a huge commercial market in entertainment and consumer electronics and technology developers are scrambling to tap in to the market. Being the most recent and dramatic change in the way we perceive sound since the invention of coil loud speaker, audio spot light technology can do many miracles in various fields like Private messaging system, Home theatre audio system, Navy and military applications, museum displays, ventriloquist systems etc. Thus audio spotlighting helps us to control where sound comes from and where it goes!



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Protein Memories for Computers

ABSTRACT


The world’s most advanced super computer doesn’t require a single semiconductor chip.
The human brain consists of organic molecules that combines to form a highly sophisticated network able to calculate, perceive, manipulate, self-repair, think and feel. Digital computers can certainly perform calculations much faster and more precisely than humans, but even simple organisms are superior to computers in the other five domains. Computer designers may never be able to make machines having all the facilities of natural brain,but we can exploit some special properties of biological molecular-particularly proteins-to build computer components that are faster ,smaller and more powerful than any electronic devices .
Devices fabricated from biological molecules promise compact size and faster data storage. They lead themselves to use in parallel processing computers,3Dmemories and neural networks.
As the trend towards miniaturization continues, the cost of manufacturing a chip increases considerably. On the other hand ,the use of biological molecules as the active components in a computer circuitry may offer an alternative approach that is more economical.



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Halo Networks

ABSTRACT


The High Altitude Long Operation Network is a broadband wireless metropolitan area network, with a star topology, whose solitary hub is located in the atmosphere above the service area at an altitude higher than commercial airline traffic. The HALO/Proteus airplane is the central node of this network. It will fly at altitudes higher than 51,000 ft. The signal footprint of the network, its “Cone of Commerce,” will have a diameter on the scale of 100 km. The initial capacity of the network will be on the scale of 10 Gb/s, with growth beyond 100 Gb/s. The network will serve the communications needs of each subscriber with bit rates in the multimegabit per second range. A variety of spectrum bands licensed by the FCC for commercial wireless services could provide the needed millimeter wavelength carrier bandwidth. An attractive choice for the subscriber links is the LMDS band.

The airplane’s fuselage can house switching circuitry and fast digital network functions. An MMW antenna array and its related components will be located in a pod suspended below the aircraft fuselage. The antenna array will produce many beams, typically more than 100. Adjacent beams will be separated in frequency. Electronic beamforming techniques can be used to stabilize the beams on the ground, as the airplane flies within its station keeping volume. For the alternative of aircraft-fixed beams, the beams will traverse over a user location, while the airplane maintains station overhead, and the virtual path will be changed to accomplish the beam-to-beam handoff. For each isolated city to be served, a fleet of three aircraft will be operated in shifts to achieve around-the-clock service. In deployments where multiple cities will be served from a common primary flight base, the fleet will be sized for allocating, on average, two aircraft per city to be served. Flight operational tactics will be steadily evolved and refined to achieve continuous presence of the node above each city. Many services will be provided, including but not limited to T1 access, ISDN access, Web browsing, high-resolution videoconferencing, large file transfers, and Ethernet LAN bridging.



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Beamed Power Transmission from Solar Power Satellites

ABSTRACT


Beamed micro wave power transmission may be thought of as extending our two dimensional power transmission networks to the three dimensional power transmission system in which power is beamed from earth to space or power collected in space is beamed back to the earth.

Solar energy is an unlimited source of energy. The electrical energy obtained from the sun by satellites in geostationary orbits is transmitted to earth. Unlike x-rays or ultra-violet radiation, microwaves are non-ionizing and are one million times too weak to cause harm (SUNSAT Energy). The only perceivable effect is heating, but since the power density of the beam near the receivers on Earth is about 20 milliwatts per square centimeter, one-fourth of natural sunlight, the heat generated is so slight that a person walking through would feel nothing. Manufacturing costs are not a problem either since materials would be negligible (when compared with the relatively giant profits that a solar power satellite would generate).

A complete microwave power transmission system is defined as a three step process in which: (1) DC power at input of the system is converted into microwave power (2) the microwave power is spread out over a transmitting aperture (antenna), the beam formed and directed at the receiver and (3) microwave power is captured from the beam and converted back into DC power at the receiving location. The efficiency of the system is then defined as the ratio of DC power output to the input.



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