2,578 research outputs found
Hydraulic Model Study: Saint Joseph Harbor Lighthouse Marina Project Investigation
https://deepblue.lib.umich.edu/bitstream/2027.42/154170/1/39015099114970.pd
Charge Symmetry Breaking in 500 MeV Nucleon-Trinucleon Scattering
Elastic nucleon scattering from the 3He and 3H mirror nuclei is examined as a
test of charge symmetry violation. The differential cross-sections are
calculated at 500 MeV using a microsopic, momentum-space optical potential
including the full coupling of two spin 1/2 particles and an exact treatment of
the Coulomb force. The charge-symmetry-breaking effects investigated arise from
a violation within the nuclear structure, from the p-nucleus Coulomb force, and
from the mass-differences of the charge symmetric states. Measurements likely
to reveal reliable information are noted.Comment: 5 page
Atomic Properties of Lu
Singly ionised Lutetium has recently been suggested as a potential clock
candidate. Here we report a joint experimental and theoretical investigation of
\ce{Lu^+}. Measurements relevant to practical clock operation are made and
compared to atomic structure calculations. Calculations of scalar and tensor
polarizabilities for clock states over a range of wavelengths are also given.
These results will be useful for future work with this clock candidate.Comment: 12 pages, 5 figure
Disorder Effect On The Anisotropic Resistivity Of Phosphorene Determined By A Tight-binding Model
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)In this work we develop a compact multiorbital tight-binding model for phosphorene that accurately describes states near the main band gap. The model parameters are adjusted using as reference the band structure obtained by a density functional theory calculation with the hybrid HSE06 functional. We use the optimized tight-binding model to study the effects of disorder on the anisotropic transport properties of phosphorene. In particular, we evaluate how the longitudinal resistivity depends on the lattice orientation for two typical disorder models: dilute scatterers with high potential fluctuation amplitudes, mimicking screened charges in the substrate, and dense scatterers with lower amplitudes, simulating weakly bounded adsorbates. We show that the intrinsic anisotropy associated to the band structure of this material, although sensitive to the type and intensity of the disorder, is robust.9416FAPESP [2015/12974-5]DOE [DE-FG02-07ER46354]Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP
Zigzag Phosphorene Nanoribbons: One-dimensional Resonant Channels In Two-dimensional Atomic Crystals
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)We theoretically investigate phosphorene zigzag nanoribbons as a platform for constriction engineering. In the presence of a constriction at one of the edges, quantum confinement of edge-protected states reveals conductance peaks, if the edge is uncoupled from the other edge. If the constriction is narrow enough to promote coupling between edges, it gives rise to Fano-like resonances as well as antiresonances in the transmission spectrum. These effects are shown to mimic an atomic chain like behavior in a two dimensional atomic crystal.719831990FAPESP [2012/19060-0, 2012/50259-8, 2010/50646-6]CNPqFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq
On the unimportance of commitment for monetary policy
In a New Keynesian model where the trade-off between stabilising the aggregate inflation rate and the output gap arises from sectoral asymmetries, the gains from commitment are either zero or negligible. Thus, to the extent that economic fluctuations are caused by sectoral shocks, policies designed to overcome the stabilisation bias are aiming to correct an unimportant problem
Taylor rules, central bank preferences and inflation targeting
The objective of this paper is to infer the policy preferences of three inflation targeting central banks, Australia, Canada and New Zealand, using an estimated New Keynesian small open economy model. While I assume that the monetary authorities optimise, I depart from previous research by assuming that monetary policy is implemented via simple Taylor-type rules, as suggested by most of the empirical literature. I then derive the weights in the objective function that make the resulting optimal interest rate rule coincide with its estimated counterpart. Therefore, from the central bank’s point of view, actual policy is optimal
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Validation of self-reported weights and heights in the avoiding diabetes after pregnancy trial (ADAPT)
Background: Randomized controlled trials that test the effectiveness of mobile health-based weight loss programs are attractive to participants, funders, and researchers because of the low implementation cost, minimal participant burden, and the ability to recruit participants from longer distances. Collecting weight data from geographically dispersed participants is a challenge. Relying on participant self-report is one approach to data collection, but epidemiologic studies indicate that self-reported anthropometric data may be inaccurate. Methods: We provided women enrolled in a randomized controlled trial (RCT) of postpartum weight loss after gestational diabetes with a digital scale and training to collect and report weight via a web-based survey. To validate self-reported weights and heights, we visited 30 randomly selected women in their homes, with a reference scale and stadiometer, a mean of 34 days after the self-report. We ran linear regression models to identify characteristics that were associated with underreporting or overreporting of anthropometric measures. Results: Of the 30 women we visited, 11 women (37%) were assigned to the weight loss intervention group and 19 women (63%) were in the control group. Mean age was 38.5 years (SD 4.5). The overall mean difference between participants’ self-reported weights and the weights obtained at their home visit was 0.70 kg (+1.92). Women assigned to the intervention group underreported their weight in comparison with the control group by 1.29 kg (95% CI −2.52, −0.06). The overall difference in collected to self-reported height was −0.56 cm (±1.91). No characteristics were associated with underreporting or overreporting of height. Conclusions: Our research suggests that by providing a digital scale and developing a weight collection protocol, researchers can train women to collect and record their own study weights with reasonable validity. To achieve the level of validity required for clinical trials, researchers should consider additional strategies to assure the validity of the data. Trial registration NCT01923350
Hydraulic Model Study: Wyandotte Wastewater Treatment Plant Influent Pump Station Wet Well
https://deepblue.lib.umich.edu/bitstream/2027.42/154185/1/39015101405044.pd
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