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The vast reduction in size and power consumption of CMOS circuitry
has led to a large research effort based around the vision of
ubiquitous networks of wireless communication nodes. The wireless
devices are usually designed to run on batteries. However, as the
networks increase in number and the devices decrease in size, the
replacement of depleted batteries is not practical. Furthermore, a
battery that is large enough to last the lifetime of the device
would dominate the overall system size, and thus is not very
attractive. There is clearly a need to explore alternative methods
of powering these small communication nodes. This book, therefore,
focuses on potential "ambient" sources of power that can be
scavenged or harvested and subsequently used to run low power
electronics and wireless transceivers.
A wide range of potential power sources are briefly explored. Based
on a comparison of these many potential sources, commonly occurring
vibrations was chosen as an attractive, and little explored, power
source. Models for different types of power converters using both
electrostatic and piezoelectric conversion mechanisms have been
developed. The models have been validated by testing prototypes
driven at vibrations similar to those found in many industrial and
commercial building environments. Finally, integration of a
piezoelectric generator, power circuit, and custom design radio
transceiver is demonstrated.
Power sources are becoming a bottleneck to the widespread
deployment of wireless sensor networks. This work reviews many
potential alternative sources of ambient power that can be
scavenged. Vibration to electricity converters are explored in
great detail, and based onstudies and experiments, are shown to be
an attractive power source in many applications.
Energy Scavenging for Wireless Sensor Networks with Special Focus
on Vibrations will be of interest to researchers and professionals
in the areas of wireless electronics, smart structures and MEMS as
well as power electronics.
Mirroring and Attunement offers a new approach to
psychoanalysis, artistic creation and religion. Viewing these
activities from a broadly relational perspective, Wright proposes
that each provides a medium for creative dialogue: the artist
discovers himself within his self-created forms, the religious
person through an internal dialogue with God, and the analysand
through the inter-subjective medium of the analysis.
Building on the work of Winnicott, Stern and Langer, the author
argues that each activity is rooted in the infant 's preverbal
relationship with the mother who holds the emerging self in an
ambience of mirroring forms, thereby providing a place for the self
to be . He suggests that the need for subjective reflection
persists throughout the life cycle and that psychoanalysis,
artistic creation and religion can be seen as cultural attempts to
provide the self with resonant containment. They thus provide
renewed opportunities for holding and emotional growth.
Mirroring and Attunement will provide essential reading for
psychoanalysts, psychotherapists, and art therapists and be of
interest to anyone working at the interface between psychoanalysis,
art and religion.
Mirroring and Attunement offers a new approach to
psychoanalysis, artistic creation and religion. Viewing these
activities from a broadly relational perspective, Wright proposes
that each provides a medium for creative dialogue: the artist
discovers himself within his self-created forms, the religious
person through an internal dialogue with God, and the analysand
through the inter-subjective medium of the analysis.
Building on the work of Winnicott, Stern and Langer, the author
argues that each activity is rooted in the infant s preverbal
relationship with the mother who holds the emerging self in an
ambience of mirroring forms, thereby providing a place for the self
to be . He suggests that the need for subjective reflection
persists throughout the life cycle and that psychoanalysis,
artistic creation and religion can be seen as cultural attempts to
provide the self with resonant containment. They thus provide
renewed opportunities for holding and emotional growth.
Mirroring and Attunement will provide essential reading for
psychoanalysts, psychotherapists, and art therapists and be of
interest to anyone working at the interface between psychoanalysis,
art and religion.
Lola Dutch is always bursting with creative ideas - and she has so many exciting plans about what she'll be when she grows up!
She could be a magnificent performer, or a daring inventor, or a brilliant botanist! Or maybe an astronaut, a pastry chef or an Egyptologist. Lola wants to try everything! How will she ever decide what she is supposed to be? Luckily, she has the help of her animal friends and her own brilliant imagination. Maybe Lola won't have to wait until she grows up to explore the world's excitements.
Inspired by their own children, Sarah Jane and Kenneth Wright are thrilled to continue this fun series about the unstoppable, larger-than-life Lola Dutch, perfect for fans of Eloise and Olivia.
The vast reduction in size and power consumption of CMOS circuitry
has led to a large research effort based around the vision of
wireless sensor networks. The proposed networks will be comprised
of thousands of small wireless nodes that operate in a multi-hop
fashion, replacing long transmission distances with many low power,
low cost wireless devices. The result will be the creation of an
intelligent environment responding to its inhabitants and ambient
conditions. Wireless devices currently being designed and built for
use in such environments typically run on batteries. However, as
the networks increase in number and the devices decrease in size,
the replacement of depleted batteries will not be practical. The
cost of replacing batteries in a few devices that make up a small
network about once per year is modest. However, the cost of
replacing thousands of devices in a single building annually, some
of which are in areas difficult to access, is simply not practical.
Another approach would be to use a battery that is large enough to
last the entire lifetime of the wireless sensor device. However, a
battery large enough to last the lifetime of the device would
dominate the overall system size and cost, and thus is not very
attractive. Alternative methods of powering the devices that will
make up the wireless networks are desperately needed.
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Lola Dutch (Hardcover)
Kenneth Wright; Illustrated by Sarah Jane Wright
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R514
R443
Discovery Miles 4 430
Save R71 (14%)
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