2,964 research outputs found
Content addressable memory project
The progress on the Rutgers CAM (Content Addressable Memory) Project is described. The overall design of the system is completed at the architectural level and described. The machine is composed of two kinds of cells: (1) the CAM cells which include both memory and processor, and support local processing within each cell; and (2) the tree cells, which have smaller instruction set, and provide global processing over the CAM cells. A parameterized design of the basic CAM cell is completed. Progress was made on the final specification of the CPS. The machine architecture was driven by the design of algorithms whose requirements are reflected in the resulted instruction set(s). A few of these algorithms are described
The relational complexity of linear groups acting on subspaces
The relational complexity of a subgroup of is a
measure of the way in which the orbits of on for various
determine the original action of . Very few precise values of relational
complexity are known. This paper determines the exact relational complexity of
all groups lying between and
, for an arbitrary field , acting on
the set of -dimensional subspaces of . We also bound the
relational complexity of all groups lying between and
, and generalise these results to the action
on -spaces for .Comment: 19 page
Beyond the Mean Field Approximation for Spin Glasses
We study the d-dimensional random Ising model using a Bethe-Peierls
approximation in the framework of the replica method. We take into account the
correct interaction only inside replicated clusters of spins. Our ansatz is
that the interaction of the borders of the clusters with the external world can
be described via an effective interaction among replicas. The Bethe-Peierls
model is mapped into a single Ising model with a random gaussian field, whose
strength (related to the effective coupling between two replicas) is determined
via a self-consistency equation. This allows us to obtain analytic estimates of
the internal energy and of the critical temperature in d dimensions.Comment: plane TeX file,19 pages. 3 figures may be requested to Paladin at
axscaq.aquila.infn.i
Impairments to Thermoregulation in the Elderly During Heat Exposure Events
Heat waves represent a public health risk to elderly people, and typically result in an increased rate of hospital admissions and deaths. Studies of thermoregulation in this cohort have generally focused on single elements such as sweating capacity. Sweating capacity and skin blood flow reduce with age, reducing ability to dissipate heat. Perception of effort during heat exposure is emerging as an area that needs further investigation as the elderly appear to lack the ability to adequately perceive increased physiological strain during heat exposure. The role of the gut and endotoxemia in heat stress has received attention in young adults, while the elderly population has been neglected. This shortcoming offers another potential avenue for identifying effective integrated health interventions to reduce heat illnesses. Increasing numbers of elderly individuals in populations worldwide are likely to increase the incidence of heat wave-induced deaths if adequate interventions are not developed, evaluated, and implemented. In this narrative-style review we identify and discuss health-related interventions for reducing the impact of heat illnesses in the elderly
Transhepatic Access to the Atrioventricular Ring for Delivery of Radiofrequency Energy
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73723/1/j.1540-8167.1997.tb00819.x.pd
Eddington-Limited Accretion in z~2 WISE-selected Hot, Dust-Obscured Galaxies
Hot, Dust-Obscured Galaxies, or "Hot DOGs", are a rare, dusty, hyperluminous
galaxy population discovered by the WISE mission. Predominantly at redshifts
2-3, they include the most luminous known galaxies in the universe. Their high
luminosities likely come from accretion onto highly obscured super massive
black holes (SMBHs). We have conducted a pilot survey to measure the SMBH
masses of five z~2 Hot DOGs via broad H_alpha emission lines, using
Keck/MOSFIRE and Gemini/FLAMINGOS-2. We detect broad H_alpha emission in all
five Hot DOGs. We find substantial corresponding SMBH masses for these Hot DOGs
(~ 10^{9} M_sun), and their derived Eddington ratios are close to unity. These
z~2 Hot DOGs are the most luminous AGNs at given BH masses, suggesting they are
accreting at the maximum rates for their BHs. A similar property is found for
known z~6 quasars. Our results are consistent with scenarios in which Hot DOGs
represent a transitional, high-accretion phase between obscured and unobscured
quasars. Hot DOGs may mark a special evolutionary stage before the red quasar
and optical quasar phases, and they may be present at other cosmic epochs.Comment: 15 pages, 9 figures. Accepted by Ap
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