Browsing MIT Open Access Articles by Title
Now showing items 35338-35357 of 55842
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On the use of simulation in robotics: Opportunities, challenges, and suggestions for moving forward
(Proceedings of the National Academy of Sciences, 2021)© 2021 National Academy of Sciences. All rights reserved. The last five years marked a surge in interest for and use of smart robots, which operate in dynamic and unstructured environments and might interact with humans. ... -
On the use of tally servers in Monte Carlo simulations of light-water reactors
(EDP Sciences, 2014-06)An algorithm for decomposing tally data in Monte Carlo simulations using servers has recently been proposed and analyzed. In the present work, we make a number of refinements to a theoretical performance model of the tally ... -
On the Use of Two-Way Fixed Effects Regression Models for Causal Inference with Panel Data
(Cambridge University Press (CUP), 2021)The two-way linear fixed effects regression (2FE) has become a default method for estimating causal effects from panel data. Many applied researchers use the 2FE estimator to adjust for unobserved unit-specific and ... -
On the Use of Two-Way Fixed Effects Regression Models for Causal Inference with Panel Data
(Cambridge University Press (CUP), 2021)The two-way linear fixed effects regression (2FE) has become a default method for estimating causal effects from panel data. Many applied researchers use the 2FE estimator to adjust for unobserved unit-specific and ... -
On the validity of ion selective membrane simplification in concentration polarization
(AIP Publishing, 2021)Ion selective membrane (ISM) is widely used in electrochemical engineering and micro-fluidic processes, yet accurate modeling of the ISM is still challenging due to many scientific issues. So far, assumptions on the "ideal ... -
On the Variability of Wind Power Input to the Oceans with a Focus on the Subpolar North Atlantic
(American Meteorological Society, 2013-06)Variations in power input to the ocean using a recent global “reanalysis” extending back to 1871 show a strong trend in the net power input since then, a trend dominated by the Southern Ocean region. This trend is interpreted ... -
On the vertex functions of type A quiver varieties
(Springer Netherlands, 2024-02-01)The goal of this paper is to better understand the quasimap vertex functions of type A Nakajima quiver varieties. To that end, we construct an explicit embedding of any type A quiver variety into a type A quiver variety ... -
ON THE WEAK-WIND PROBLEM IN MASSIVE STARS: X-RAY SPECTRA REVEAL A MASSIVE HOT WIND IN μ COLUMBAE
(IOP Publishing, 2012-08)μ Columbae is a prototypical weak-wind O star for which we have obtained a high-resolution X-ray spectrum with the Chandra LETG/ACIS instrument and a low-resolution spectrum with Suzaku. This allows us, for the first time, ... -
On the weakest failure detector ever
(Springer Berlin Heidelberg, 2009-01)Many problems in distributed computing are impossible to solve when no information about process failures is available. It is common to ask what information about failures is necessary and sufficient to circumvent some ... -
On the Wind Power Input to the Ocean General Circulation
(American Meteorological Society, 2012-08)The wind power input to the ocean general circulation is usually calculated from the time-averaged wind products. Here, this wind power input is reexamined using available observations, focusing on the role of the synoptically ... -
On thermal performance of seawater cooling towers
(American Society of Mechanical Engineers, 2011-04)Seawater cooling towers have been used since the 1970s in power generation and other industries, so as to reduce the consumption of freshwater. The salts in seawater are known to create a number of operational problems, ... -
On thermally forced flows in urban street canyons
(Springer Netherlands, 2014-04)During sunny days with periods of low synoptic wind, buoyancy forces can play a critical role on the air flow, and thus on the dispersion of pollutants in the built urban environments. Earlier studies provide evidence that ... -
On Time Domain Analysis of Photoplethysmogram Signals for Monitoring Heat Stress
(Multidisciplinary Digital Publishing Institute (MDPI), 2015-09)There are a limited number of studies on heat stress dynamics during exercise using the photoplethysmogram (PPG) and its second derivative (APG). However, we investigate the most suitable index from short PPG signal ... -
On total Springer representations for classical types
(Springer International Publishing, 2018-08-31)Abstract We give explicit formulas on total Springer representations for classical types. We also describe the characters of restrictions of such representations to a maximal parabolic subgroup isomorphic ... -
ON TWO FINITENESS CONDITIONS FOR HOPF ALGEBRAS WITH NONZERO INTEGRAL
(Scuola normale superiore di Pisa, 2015-06)A Hopf algebra is co-Frobenius when it has a nonzero integral. It is proved that the composition length of the indecomposable injective comodules over a co-Frobenius Hopf algebra is bounded. As a consequence, the coradical ... -
On two problems in graph Ramsey theory
(Springer-Verlag, 2012-05)We study two classical problems in graph Ramsey theory, that of determining the Ramsey number of bounded-degree graphs and that of estimating the induced Ramsey number for a graph with a given number of vertices. The ... -
On uniqueness of tangent cones for Einstein manifolds
(Springer-Verlag, 2013-06)We show that for any Ricci-flat manifold with Euclidean volume growth the tangent cone at infinity is unique if one tangent cone has a smooth cross-section. Similarly, for any noncollapsing limit of Einstein manifolds with ... -
On universal Lie nilpotent associative algebras
(Elsevier B.V., 2009-01)We study the quotient Qi(A) of a free algebra A by the ideal Mi (A) generated by the i th commutator of any elements. In particular, we completely describe such quotient for i=4 (for i 3 this was done previously by ... -
On unlimited sampling
(Institute of Electrical and Electronics Engineers (IEEE), 2017-07)© 2017 IEEE. Shannon's sampling theorem provides a link between the continuous and the discrete realms stating that bandlimited signals are uniquely determined by its values on a discrete set. This theorem is realized in ... -
On unlimited sampling
(Institute of Electrical and Electronics Engineers (IEEE), 2017-07)© 2017 IEEE. Shannon's sampling theorem provides a link between the continuous and the discrete realms stating that bandlimited signals are uniquely determined by its values on a discrete set. This theorem is realized in ...
