2,323 research outputs found
Labor Guide to Labor Law
[Excerpt] This book is a practical guide to labor law in the private sector. The first 8 chapters present a discussion of legal principles primarily based on the Labor Management Relations Act (LMRA), 1947, as amended, commonly referred to as the “Act.” The remaining chapters discuss principles based on the Labor Management Reporting and Disclosure Act and the Civil Rights Act of 1964, as amended, as well as on the LMRA
Formation of Cosmic Dust Bunnies
Planetary formation is an efficient process now thought to take place on a
relatively short astronomical time scale. Recent observations have shown that
the dust surrounding a protostar emits more efficiently at longer wavelengths
as the protoplanetary disk evolves, suggesting that the dust particles are
coagulating into fluffy aggregates, "much as dust bunnies form under a bed."
One poorly understood problem in this coagulation process is the manner in
which micron-sized, charged grains form the fractal aggregate structures now
thought to be the precursors of protoplanetary disk evolution. This study
examines the characteristics of such fractal aggregates formed by the collision
of spherical monomers and aggregates where the charge is distributed over the
aggregate structure. The aggregates are free to rotate due to collisions and
dipole-dipole electrostatic interactions. Comparisons are made for different
precursor size distributions and like-charged, oppositelycharged, and neutral
grains
Aqueous-Based Extrusion Fabrication of Ceramics on Demand
Aqueous-Based Extrusion Fabrication is an additive manufacturing technique that
extrudes ceramic slurries of high solids loading layer by layer for part fabrication. The
material reservoir in a previously developed system has been modified to allow for
starting and stopping of the extrusion process on demand. Design pros and cons are
examined and a comparison between two material reservoir designs is made. Tests are
conducted to determine the optimal deposition parameters for starting and stopping the
extrudate on demand. The collected test data is used for the development of a deposition
strategy that improves material deposition consistency, including reduced material
buildup at sharp corners. Example parts are fabricated using the deposition strategy and
hardware design.Mechanical Engineerin
Bidirectional ventricular tachycardia in cardiac sarcoidosis.
A 73-year-old man with history of pulmonary sarcoidosis was found to have runs of non-sustained bidirectional ventricular tachycardia (BVT) with two different QRS morphologies on a Holter monitor. Cardiac magnetic resonance delayed gadolinium imaging revealed a region of patchy mid-myocardial enhancement within the left ventricular basal inferolateral myocardium. An 18-fluorodeoxyglucose positron emission tomography (FDG-PET) showed increased uptake in the same area, consistent with active sarcoid, with no septal involvement. Follow-up FDG-PET one year later showed disease progression with new septal involvement. Cardiac sarcoidosis, characterized by myocardial inflammation and interstitial fibrosis that can lead to conduction system disturbance and macro re-entrant arrhythmias, should be considered in differential diagnosis of BVT. BVT may indicate septal involvement with sarcoidosis before the lesions are large enough to be detected radiologically
Is there a north-south divide between schools in England?
The article is an opinion piece which examines the extent to which rhetoric about a north-south divide in performance between schools in England is justified. Starting with the catalyst, Sir Michael Wilshaw’s final annual Ofsted reports in 2015 and 2016, it traces how the divide rhetoric has been assimilated into popular discourse by the media and subsequent policy reports, notably in connection with the Northern Powerhouse agenda. The article uses regional school performance data to examine whether claims about the divide are convincing, focusing on the North East which has been recognised as an outlier in both primary and secondary performance. It concludes that the case for a north-south divide is not proven and with an appeal for more contextually sensitive and flexible approaches to assessing local, regional and national school performance to counter the negative effects of this divisive rhetoric
Summary of a Crew-Centered Flight Deck Design Philosophy for High-Speed Civil Transport (HSCT) Aircraft
Past flight deck design practices used within the U.S. commercial transport aircraft industry have been highly successful in producing safe and efficient aircraft. However, recent advances in automation have changed the way pilots operate aircraft, and these changes make it necessary to reconsider overall flight deck design. Automated systems have become more complex and numerous, and often their inner functioning is partially or fully opaque to the flight crew. Recent accidents and incidents involving autoflight system mode awareness Dornheim, 1995) are an example. This increase in complexity raises pilot concerns about the trustworthiness of automation, and makes it difficult for the crew to be aware of all the intricacies of operation that may impact safe flight. While pilots remain ultimately responsible for mission success, performance of flight deck tasks has been more widely distributed across human and automated resources. Advances in sensor and data integration technologies now make far more information available than may be prudent to present to the flight crew
Ex. 280-US-416
A report on the movement of Lost River and shortnose suckers through the Sprague River ladder at the Chiloquin Dam, Spring 2000
Fast Dynamic System Identification with Karhunen-Lo\`eve Decomposed Gaussian Processes
A promising approach for scalable Gausian processes (GPs) is the
Karhunen-Lo\`eve (KL) decomposition, in which the GP kernel is represented by a
set of basis functions which are the eigenfunctions of the kernel operator.
Such decomposed kernels have the potential to be very fast, and do not depend
on the selection of a reduced set of inducing points. However KL decompositions
lead to high dimensionality, and variable selection becomes paramount. This
paper reports a new method of forward variable selection, enabled by the
ordered nature of the basis functions in the KL expansion of the Bayesian
Smoothing Spline ANOVA kernel (BSS-ANOVA), coupled with fast Gibbs sampling in
a fully Bayesian approach. It quickly and effectively limits the number of
terms, yielding a method with competitive accuracies, training and inference
times for tabular datasets of low feature set dimensionality. The inference
speed and accuracy makes the method especially useful for dynamic systems
identification, by modeling the dynamics in the tangent space as a static
problem, then integrating the learned dynamics using a high-order scheme. The
methods are demonstrated on two dynamic datasets: a `Susceptible, Infected,
Recovered' (SIR) toy problem, with the transmissibility used as forcing
function, along with the experimental `Cascaded Tanks' benchmark dataset.
Comparisons on the static prediction of time derivatives are made with a random
forest (RF), a residual neural network (ResNet), and the Orthogonal Additive
Kernel (OAK) inducing points scalable GP, while for the timeseries prediction
comparisons are made with LSTM and GRU recurrent neural networks (RNNs) along
with a number of basis set / optimizer combinations within the SINDy package
Ex. 280-US-416
A report on the movement of Lost River and shortnose suckers through the Sprague River ladder at the Chiloquin Dam, Spring 2000
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