23,060 research outputs found
A Light Dilaton in Walking Gauge Theories
We analyze the existence of a dilaton in gauge theories with approximate
infrared conformal symmetry. To the extent that these theories are governed in
the infrared by an approximate fixed point (walking), the explicit breaking of
the conformal symmetry at these scales is vanishingly small. If confinement and
spontaneous chiral-symmetry breaking set in at some infrared scale, the
resultant breaking of the approximate conformal symmetry can lead to the
existence of a dilaton with mass parametrically small compared to the
confinement scale, and potentially observable at the LHC.Comment: 5 pages, references added, final version in PR
MIMO In Vivo
We present the performance of MIMO for in vivo environments, using ANSYS HFSS
and their complete human body model, to determine the maximum data rates that
can be achieved using an IEEE 802.11n system. Due to the lossy nature of the in
vivo medium, achieving high data rates with reliable performance will be a
challenge, especially since the in vivo antenna performance is strongly
affected by near field coupling to the lossy medium and the signals levels will
be limited by specified specific absorption rate (SAR) levels. We analyzed the
bit error rate (BER) of a MIMO system with one pair of antennas placed in vivo
and the second pair placed inside and outside the body at various distances
from the in vivo antennas. The results were compared to SISO simulations and
showed that by using MIMO in vivo, significant performance gain can be
achieved, and at least two times the data rate can be supported with SAR
limited transmit power levels, making it possible to achieve target data rates
in the 100 Mbps.Comment: WAMICON 201
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Variability of Universal Life Cash Flows under Higher Risk Investment Strategies
This integrated project studied the offsetting elements of higher nominal yields, greater credit loss expectations, and higher capital requirements on the profitability of the life insurer that pursues a higher yield investment strategy. Profitability measures were developed for a Universal Life product. The report provides an attribution of profit drivers for the insurer. The effects of credit rating migration on credit loss rates and bond capital charges were examined, and investment strategies were tested under credit stress scenarios
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