Improved Measurement of Muon Antineutrino Disappearance in MINOS

We report an improved measurement of ν̅_μ disappearance over a distance of 735 km using the MINOS detectors and the Fermilab Main Injector neutrino beam in a ν̅_μ-enhanced configuration. From a total exposure of 2.95×10^20 protons on target, of which 42% have not been previously analyzed, we make the most precise measurement of Δm̅^2=[2.62_(-0.28)^(+0.31)(stat)±0.09(syst)]×10^(-3)  eV^2 and constrain the ν_μ mixing angle sin^(2)(2θ̅)>0.75 (90% C.L.). These values are in agreement with Δm^2 and sin^(2)(2θ) measured for νμ, removing the tension reported in [ P. Adamson et al. Phys. Rev. Lett. 107 021801 (2011)]

Search for Lorentz Invariance and CPT Violation with the MINOS Far Detector

We searched for a sidereal modulation in the MINOS far detector neutrino rate. Such a signal would be a consequence of Lorentz and CPT violation as described by the standard-model extension framework. It also would be the first detection of a perturbative effect to conventional neutrino mass oscillations. We found no evidence for this sidereal signature, and the upper limits placed on the magnitudes of the Lorentz and CPT violating coefficients describing the theory are an improvement by factors of 20–510 over the current best limits found by using the MINOS near detector

Pruning Neural Networks via Coresets and Convex Geometry: Towards No Assumptions

Pruning is one of the predominant approaches for compressing deep neural networks (DNNs). Lately, coresets (provable data summarizations) were leveraged for pruning DNNs, adding the advantage of theoretical guarantees on the trade-off between the compression rate and the approximation error. However, coresets in this domain were either data-dependent or generated under restrictive assumptions on both the model's weights and inputs. In real-world scenarios, such assumptions are rarely satisfied, limiting the applicability of coresets. To this end, we suggest a novel and robust framework for computing such coresets under mild assumptions on the model's weights and without any assumption on the training data. The idea is to compute the importance of each neuron in each layer with respect to the output of the following layer. This is achieved by a combination of L\"{o}wner ellipsoid and Caratheodory theorem. Our method is simultaneously data-independent, applicable to various networks and datasets (due to the simplified assumptions), and theoretically supported. Experimental results show that our method outperforms existing coreset based neural pruning approaches across a wide range of networks and datasets. For example, our method achieved a $62\%$ compression rate on ResNet50 on ImageNet with $1.09\%$ drop in accuracy

Literary Writing and Personal Identity in Borges and Pessoa

In a famous passage in “The Death of the Author,” Roland Barthes describes the writing process as embodying the disintegration of the author’s personal identity: “Writing is that neutral, composite, oblique space where our subject slips away, the negative where all identity is lost, starting with the very identity of the body writing” (142). This postmodern position is deeply rooted in classical Greek thought, in particular Plato’s harsh critique of poetic inspiration, conceived as “holy madness.” Is this equation valid, however? Does writing necessarily serve as the ultimate act of self-negation? This essay seeks to elucidate Jorge Luis Borges’ and Fernando Pessoa’s alternative views of authorial subjectivity. Borges and Pessoa – arguably two of the greatest writers of the twentieth century – conceive the interplay between writing and self-identity in rather complex fashion. Pessoa’s term “heteronym” relates to the way in which an author’s subjectivity abruptly gives way to an idiosyncratic identity who composes the poem. This recalls the Kabbalistic idea of God’s contraction (tzimzum), the creator preserving his or her passive self-identity while giving birth to other beings from his or her inner void. Discussing Shakespeare and Whitman, Borges proposes that the act of writing is a form of self-creation in which the writer begets a unique narrative identity out of himself or herself that, transfigured, is simultaneously both the same and the other

Search for Sterile Neutrinos in MINOS and MINOS+ Using a Two-Detector Fit

A search for mixing between active neutrinos and light sterile neutrinos has been performed by looking for muon neutrino disappearance in two detectors at baselines of 1.04 and 735 km, using a combined MINOS and MINOS+ exposure of 16.36×10^(20) protons on target. A simultaneous fit to the charged-current muon neutrino and neutral-current neutrino energy spectra in the two detectors yields no evidence for sterile neutrino mixing using a 3+1 model. The most stringent limit to date is set on the mixing parameter sin^2θ_(24) for most values of the sterile neutrino mass splitting Δm^2_(41) > 10^(−4)  eV^2