590 research outputs found
A Four Layer Bayesian Network for Product Model Based Information Mining
Business and engineering knowledge in AEC/FM is captured mainly implicitly in project and corporate document repositories. Even with the increasing integration of model-based systems with project information spaces, a large percentage of the information exchange will further on rely on isolated and rather poorly structured text documents. In this paper we propose an approach enabling the use of product model data as a primary source of engineering knowledge to support information externalisation from relevant construction documents, to provide for domain-specific information retrieval, and to help in re-organising and re-contextualising documents in accordance to the user’s discipline-specific tasks and information needs. Suggested is a retrieval and mining framework combining methods for analysing text documents, filtering product models and reasoning on Bayesian networks to explicitly represent the content of text repositories in personalisable semantic content networks. We describe the proposed basic network that can be realised on short-term using minimal product model information as well as various extensions towards a full-fledged added value integration of document-based and model-based information
The Effect of Changes in the Federal Disability Programs on State and Local General Assistance Programs
Since early 1981, there has been a large-scale removal of persons from the SSI and Social Security disability programs as a result of the Social Security Disability Amendments of 1980. This article reports on the findings of a national survey designed to determine whether the removal of persons from the federal disability programs had an impact on state and local General Assistance programs and the extent to which older recipients of General Assistance are in need of long-term income assistance for health and other reasons.
Some states and jurisdictions have noticed an increase in applications as a result of federal cutoffs and tightened administrative policies which is an indicator that state and local programs are sensitive to changes in federal policies. Since General Assistance programs are serving persons terminated from federal disability programs and a significant number of older clients who are in need of long-term income assistance, this article suggests that consideration should be given to modifying the disability criteria for the SSI program, at least for older persons
The Effect of Changes in the Federal Disability Programs on State and Local General Assistance Programs
Since early 1981, there has been a large-scale removal of persons from the SSI and Social Security disability programs as a result of the Social Security Disability Amendments of 1980. This article reports on the findings of a national survey designed to determine whether the removal of persons from the federal disability programs had an impact on state and local General Assistance programs and the extent to which older recipients of General Assistance are in need of long-term income assistance for health and other reasons.
Some states and jurisdictions have noticed an increase in applications as a result of federal cutoffs and tightened administrative policies which is an indicator that state and local programs are sensitive to changes in federal policies. Since General Assistance programs are serving persons terminated from federal disability programs and a significant number of older clients who are in need of long-term income assistance, this article suggests that consideration should be given to modifying the disability criteria for the SSI program, at least for older persons
Analysis of the Tuning Sensitivity of Silicon-on-Insulator Optical Ring Resonators
High-quality-factor optical ring resonators have recently been fabricated in thin silicon-on-insulator (SOI). Practical applications of such devices will require careful tuning of the precise location of the resonance peaks. In particular, one often wants to maximize the resonance shift due to the presence of an active component and minimize the resonance shift due to temperature changes. This paper presents a semianalytic formalism that allows the prediction of such resonance shifts from the waveguide geometry. This paper also presents the results of experiments that show the tuning behavior of several ring resonators and find that the proposed semianalytic formalism agrees with the observed behavior
Concrete resource analysis of the quantum linear system algorithm used to compute the electromagnetic scattering cross section of a 2D target
We provide a detailed estimate for the logical resource requirements of the
quantum linear system algorithm (QLSA) [Phys. Rev. Lett. 103, 150502 (2009)]
including the recently described elaborations [Phys. Rev. Lett. 110, 250504
(2013)]. Our resource estimates are based on the standard quantum-circuit model
of quantum computation; they comprise circuit width, circuit depth, the number
of qubits and ancilla qubits employed, and the overall number of elementary
quantum gate operations as well as more specific gate counts for each
elementary fault-tolerant gate from the standard set {X, Y, Z, H, S, T, CNOT}.
To perform these estimates, we used an approach that combines manual analysis
with automated estimates generated via the Quipper quantum programming language
and compiler. Our estimates pertain to the example problem size N=332,020,680
beyond which, according to a crude big-O complexity comparison, QLSA is
expected to run faster than the best known classical linear-system solving
algorithm. For this problem size, a desired calculation accuracy 0.01 requires
an approximate circuit width 340 and circuit depth of order if oracle
costs are excluded, and a circuit width and depth of order and
, respectively, if oracle costs are included, indicating that the
commonly ignored oracle resources are considerable. In addition to providing
detailed logical resource estimates, it is also the purpose of this paper to
demonstrate explicitly how these impressively large numbers arise with an
actual circuit implementation of a quantum algorithm. While our estimates may
prove to be conservative as more efficient advanced quantum-computation
techniques are developed, they nevertheless provide a valid baseline for
research targeting a reduction of the resource requirements, implying that a
reduction by many orders of magnitude is necessary for the algorithm to become
practical.Comment: 37 pages, 40 figure
Can drying and re-wetting of magnesium sulfate salts lead to damage of stone?
Magnesium sulfate salts have been linked to the decay of stone in the field and in laboratory experiments, but the mechanism of damage is still poorly understood. Thermomechanical analysis shows that expansion of stone contaminated with magnesium sulfate salts occurs during drying, followed by relaxation of the stress during dehydration of the precipitated salts. We applied thermogravimetric analysis and X-ray diffractometry to identify the salt phases that precipitate during drying of bulk solutions. The results show the formation of 11 different crystal phases. A novel experiment in which a plate of salt-laden stone is bonded to a glass plate is used to demonstrate the existence of crystallization pressure: warping of the composite reveals significant deformation of the stone during re-wetting of lower hydrates of magnesium sulfate. Environmental scanning electronic microscope (ESEM)/STEM experiments show that hydration of single crystals of the lower hydrates of magnesium sulfate is a through-solution crystallization process that is only visible at a small scale (~ÎĽm). It is followed by growth of the crystal prior to deliquescence. This demonstrates that crystallization pressure is the main cause of the stress induced by salt hydration. In addition, we found that drying-induced crystallization is kinetically hindered at high concentration, which we attribute to the low nucleation rate in a highly viscous magnesium sulfate solutio
Learning-on-the-Drive: Self-supervised Adaptation of Visual Offroad Traversability Models
Autonomous off-road driving requires understanding traversability, which
refers to the suitability of a given terrain to drive over. When offroad
vehicles travel at high speed (), they need to reason at long-range
(-) for safe and deliberate navigation. Moreover, vehicles often
operate in new environments and under different weather conditions. LiDAR
provides accurate estimates robust to visual appearances, however, it is often
too noisy beyond 30m for fine-grained estimates due to sparse measurements.
Conversely, visual-based models give dense predictions at further distances but
perform poorly at all ranges when out of training distribution. To address
these challenges, we present ALTER, an offroad perception module that
adapts-on-the-drive to combine the best of both sensors. Our visual model
continuously learns from new near-range LiDAR measurements. This
self-supervised approach enables accurate long-range traversability prediction
in novel environments without hand-labeling. Results on two distinct real-world
offroad environments show up to 52.5% improvement in traversability estimation
over LiDAR-only estimates and 38.1% improvement over non-adaptive visual
baseline.Comment: 8 page
Teachers' voicing and silence periods during continuous speech in classrooms with different reverberation times
The relationship between reverberation times and the voicing and silence
accumulations of continuous speech was quantified in 22 primary-school teachers.
Teachers were divided into a high and a low reverberation time groups based on their
classroom reverberation time (higher and lower than 0.90 s). Reverberation times
higher than 0.90 s implicate higher voicing accumulations and higher accumulations of
the silences typical of turn taking in dialogue. These results suggest that vocal load,
which can lead to vocal fatigue, is influenced by classroom reverberation time.
Therefore, it may be considered a risk factor for occupational voice users
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