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S-Hybrid Step-Down DC-DC Converter-Analysis of Operation and Design Considerations
Wearable, small, and robust: the circular quarter-mode textile antenna
A miniaturized wearable antenna, entirely implemented in textile materials, is proposed that relies on a quarter-mode substrate integrated waveguide topology. The design combines compact dimensions with high body-antenna isolation, making it excellently suited for off-body communication in wearable electronics/smart textile applications. The fabricated antenna achieves stable on-body performance. A measured on-body impedance matching bandwidth of 5.1% is obtained, versus 4.8% in free space. The antenna gain equals 3.8 dBi in the on-body and 4.2 dBi for the free-space scenario. High radiation efficiency, measured to be 81% in free space, is combined with a low calculated specific absorption rate of 0.45 mW/g, averaged over 1 g of tissue, with 500 mW input power
Force-Guiding Particle Chains for Shape-Shifting Displays
We present design and implementation of a chain of particles that can be
programmed to fold the chain into a given curve. The particles guide an
external force to fold, therefore the particles are simple and amenable for
miniaturization. A chain can consist of a large number of such particles. Using
multiple of these chains, a shape-shifting display can be constructed that
folds its initially flat surface to approximate a given 3D shape that can be
touched and modified by users, for example, enabling architects to
interactively view, touch, and modify a 3D model of a building.Comment: 6 pages, 5 figure, submitted to IROS 201
Nanoelectronics
In this chapter we intend to discuss the major trends in the evolution of
microelectronics and its eventual transition to nanoelectronics. As it is well
known, there is a continuous exponential tendency of microelectronics towards
miniaturization summarized in G. Moore's empirical law. There is consensus that
the corresponding decrease in size must end in 10 to 15 years due to physical
as well as economical limits. It is thus necessary to prepare new solutions if
one wants to pursue this trend further. One approach is to start from the
ultimate limit, i.e. the atomic level, and design new materials and components
which will replace the present day MOS (metal-oxide-semi- conductor) based
technology. This is exactly the essence of nanotechnology, i.e. the ability to
work at the molecular level, atom by atom or molecule by molecule, to create
larger structures with fundamentally new molecular orga- nization. This should
lead to novel materials with improved physical, chemi- cal and biological
properties. These properties can be exploited in new devices. Such a goal would
have been thought out of reach 15 years ago but the advent of new tools and new
fabrication methods have boosted the field. We want to give here an overview of
two different subfields of nano- electronics. The first part is centered on
inorganic materials and describes two aspects: i) the physical and economical
limits of the tendency to miniaturiza- tion; ii) some attempts which have
already been made to realize devices with nanometric size. The second part
deals with molecular electronics, where the basic quantities are now molecules,
which might offer new and quite interest- ing possibilities for the future of
nanoelectronicsComment: HAL : hal-00710039, version 2. This version corrects some aspect
concerning the metal-insulator-metal without dot
Beyond Moore's technologies: operation principles of a superconductor alternative
The predictions of Moore's law are considered by experts to be valid until
2020 giving rise to "post-Moore's" technologies afterwards. Energy efficiency
is one of the major challenges in high-performance computing that should be
answered. Superconductor digital technology is a promising post-Moore's
alternative for the development of supercomputers. In this paper, we consider
operation principles of an energy-efficient superconductor logic and memory
circuits with a short retrospective review of their evolution. We analyze their
shortcomings in respect to computer circuits design. Possible ways of further
research are outlined.Comment: OPEN ACCES
A direct-sequence spread-spectrum communication system for integrated sensor microsystems
Some of the most important challenges in health-care technologies have been identified to be development of noninvasive systems and miniaturization. In developing the core technologies, progress is required in pushing the limits of miniaturization, minimizing the costs and power consumption of microsystems components, developing mobile/wireless communication infrastructures and computing technologies that are reliable. The implementation of such miniaturized systems has become feasible by the advent of system-on-chip technology, which enables us to integrate most of the components of a system on to a single chip. One of the most important tasks in such a system is to convey information reliably on a multiple-access-based environment. When considering the design of telecommunication system for such a network, the receiver is the key performance critical block. The paper describes the application environment, the choice of the communication protocol, the implementation of the transmitter and receiver circuitry, and research work carried out on studying the impact of input data characteristics and internal data path complexity on area and power performance of the receiver. We provide results using a test data recorded from a pH sensor. The results demonstrate satisfying functionality, area, and power constraints even when a degree of programmability is incorporated in the system
Prospects for the Application of Nanotechnologies to the Computer System Architecture
Computer system architecture essentially influences the comfort of our everyday living. Developmental
transition from electromechanical relays to vacuum tubes, from transistors to integrated circuits has significantly
changed technological standards for the architecture of computer systems. Contemporary information
technologies offer huge potential concerning miniaturization of electronic circuits. Presently, a
modern integrated circuit includes over a billion of transistors, each of them smaller than 100 nm . Stepping
beyond the symbolic 100 nm limit means that with the onset of the 21 century we have entered a new
scientific area that is an era of nanotechnologies. Along with the reduction of transistor dimensions their
operation speed and efficiency grow. However, the hitherto observed developmental path of classical electronics
with its focus on the miniaturization of transistors and memory cells seems arriving at the limits of
technological possibilities because of technical problems as well as physical limitations related to the appearance
of new nano-scale phenomena as e.g. quantum effects.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2488
Prospects for the Application of Nanotechnologies to the Computer System Architecture
Computer system architecture essentially influences the comfort of our everyday living. Developmental
transition from electromechanical relays to vacuum tubes, from transistors to integrated circuits has significantly
changed technological standards for the architecture of computer systems. Contemporary information
technologies offer huge potential concerning miniaturization of electronic circuits. Presently, a
modern integrated circuit includes over a billion of transistors, each of them smaller than 100 nm . Stepping
beyond the symbolic 100 nm limit means that with the onset of the 21 century we have entered a new
scientific area that is an era of nanotechnologies. Along with the reduction of transistor dimensions their
operation speed and efficiency grow. However, the hitherto observed developmental path of classical electronics
with its focus on the miniaturization of transistors and memory cells seems arriving at the limits of
technological possibilities because of technical problems as well as physical limitations related to the appearance
of new nano-scale phenomena as e.g. quantum effects.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2488
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